patch-2.4.22 linux-2.4.22/drivers/scsi/aic7xxx/aic7xxx_osm.c
Next file: linux-2.4.22/drivers/scsi/aic7xxx/aic7xxx_osm.h
Previous file: linux-2.4.22/drivers/scsi/aic7xxx/aic7xxx_inline.h
Back to the patch index
Back to the overall index
- Lines: 5663
- Date:
2003-08-25 04:44:42.000000000 -0700
- Orig file:
linux-2.4.21/drivers/scsi/aic7xxx/aic7xxx_osm.c
- Orig date:
2003-06-13 07:51:36.000000000 -0700
diff -urN linux-2.4.21/drivers/scsi/aic7xxx/aic7xxx_osm.c linux-2.4.22/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -1,7 +1,7 @@
/*
* Adaptec AIC7xxx device driver for Linux.
*
- * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#103 $
+ * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#234 $
*
* Copyright (c) 1994 John Aycock
* The University of Calgary Department of Computer Science.
@@ -108,7 +108,7 @@
* but are not limited to:
*
* 1: Import of the latest FreeBSD sequencer code for this driver
- * 2: Modification of kernel code to accomodate different sequencer semantics
+ * 2: Modification of kernel code to accommodate different sequencer semantics
* 3: Extensive changes throughout kernel portion of driver to improve
* abort/reset processing and error hanndling
* 4: Other work contributed by various people on the Internet
@@ -119,36 +119,37 @@
*
*/
-/*
- * This is the only file where module.h should
- * embed module global version info.
- */
-#define AHC_MODVERSION_FILE
-
#include "aic7xxx_osm.h"
#include "aic7xxx_inline.h"
+#include <scsi/scsicam.h>
+
+/*
+ * Include aiclib.c as part of our
+ * "module dependencies are hard" work around.
+ */
+#include "aiclib.c"
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
#include <linux/init.h> /* __setup */
#endif
-#include "../sd.h" /* For geometry detection */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+#include "sd.h" /* For geometry detection */
+#endif
#include <linux/mm.h> /* For fetching system memory size */
#include <linux/blk.h> /* For block_size() */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0)
/*
* Lock protecting manipulation of the ahc softc list.
*/
spinlock_t ahc_list_spinlock;
-#endif
-/*
- * To generate the correct addresses for the controller to issue
- * on the bus. Originally added for DEC Alpha support.
- */
-#define VIRT_TO_BUS(a) (uint32_t)virt_to_bus((void *)(a))
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+/* For dynamic sglist size calculation. */
+u_int ahc_linux_nseg;
+#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)
struct proc_dir_entry proc_scsi_aic7xxx = {
@@ -280,6 +281,39 @@
};
/*
+ * DV option:
+ *
+ * positive value = DV Enabled
+ * zero = DV Disabled
+ * negative value = DV Default for adapter type/seeprom
+ */
+#ifdef CONFIG_AIC7XXX_DV_SETTING
+#define AIC7XXX_CONFIGED_DV CONFIG_AIC7XXX_DV_SETTING
+#else
+#define AIC7XXX_CONFIGED_DV -1
+#endif
+
+static int8_t aic7xxx_dv_settings[] =
+{
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV,
+ AIC7XXX_CONFIGED_DV
+};
+
+/*
* There should be a specific return value for this in scsi.h, but
* it seems that most drivers ignore it.
*/
@@ -325,31 +359,26 @@
* disabled at the very end. That should fix everyone up unless there are
* really strange cirumstances.
*/
-static int aic7xxx_reverse_scan = 0;
+static uint32_t aic7xxx_reverse_scan;
/*
* Should we force EXTENDED translation on a controller.
* 0 == Use whatever is in the SEEPROM or default to off
* 1 == Use whatever is in the SEEPROM or default to on
*/
-static uint32_t aic7xxx_extended = 0;
+static uint32_t aic7xxx_extended;
/*
* PCI bus parity checking of the Adaptec controllers. This is somewhat
* dubious at best. To my knowledge, this option has never actually
* solved a PCI parity problem, but on certain machines with broken PCI
- * chipset configurations, it can generate tons of false error messages.
+ * chipset configurations where stray PCI transactions with bad parity are
+ * the norm rather than the exception, the error messages can be overwelming.
* It's included in the driver for completeness.
- * 0 = Shut off PCI parity check
- * -1 = Normal polarity pci parity checking
- * 1 = reverse polarity pci parity checking
- *
- * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
- * variable to -1 you would actually want to simply pass the variable
- * name without a number. That will invert the 0 which will result in
- * -1.
+ * 0 = Shut off PCI parity check
+ * non-0 = reverse polarity pci parity checking
*/
-static int aic7xxx_pci_parity = 0;
+static uint32_t aic7xxx_pci_parity = ~0;
/*
* Certain newer motherboards have put new PCI based devices into the
@@ -362,15 +391,20 @@
* would result in never finding any devices :)
*/
#ifndef CONFIG_AIC7XXX_PROBE_EISA_VL
-#define CONFIG_AIC7XXX_PROBE_EISA_VL n
-#endif
-#if CONFIG_AIC7XXX_PROBE_EISA_VL == n
-static int aic7xxx_no_probe = 1;
+uint32_t aic7xxx_probe_eisa_vl;
#else
-static int aic7xxx_no_probe;
+uint32_t aic7xxx_probe_eisa_vl = ~0;
#endif
/*
+ * There are lots of broken chipsets in the world. Some of them will
+ * violate the PCI spec when we issue byte sized memory writes to our
+ * controller. I/O mapped register access, if allowed by the given
+ * platform, will work in almost all cases.
+ */
+uint32_t aic7xxx_allow_memio = ~0;
+
+/*
* aic7xxx_detect() has been run, so register all device arrivals
* immediately with the system rather than deferring to the sorted
* attachment performed by aic7xxx_detect().
@@ -387,7 +421,7 @@
* We default to 256ms because some older devices need a longer time
* to respond to initial selection.
*/
-static int aic7xxx_seltime = 0x00;
+static uint32_t aic7xxx_seltime;
/*
* Certain devices do not perform any aging on commands. Should the
@@ -397,7 +431,7 @@
* force all outstanding transactions to be serviced prior to a new
* transaction.
*/
-int aic7xxx_periodic_otag;
+uint32_t aic7xxx_periodic_otag;
/*
* Module information and settable options.
@@ -413,49 +447,99 @@
MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,10)
+#ifdef MODULE_LICENSE
MODULE_LICENSE("Dual BSD/GPL");
#endif
MODULE_PARM(aic7xxx, "s");
-MODULE_PARM_DESC(aic7xxx, "period delimited, options string.\n"
+MODULE_PARM_DESC(aic7xxx,
+"period delimited, options string.\n"
" verbose Enable verbose/diagnostic logging\n"
-" no_probe Disable EISA/VLB controller probing\n"
+" allow_memio Allow device registers to be memory mapped\n"
+" debug Bitmask of debug values to enable\n"
+" no_probe Toggle EISA/VLB controller probing\n"
+" probe_eisa_vl Toggle EISA/VLB controller probing\n"
" no_reset Supress initial bus resets\n"
" extended Enable extended geometry on all controllers\n"
-" periodic_otag Send an ordered tagged transaction periodically\n"
-" to prevent tag starvation. This may be\n"
-" required by some older disk drives/RAID arrays.\n"
+" periodic_otag Send an ordered tagged transaction\n"
+" periodically to prevent tag starvation.\n"
+" This may be required by some older disk\n"
+" drives or RAID arrays.\n"
" reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
" tag_info:<tag_str> Set per-target tag depth\n"
-" seltime:<int> Selection Timeout(0/256ms,1/128ms,2/64ms,3/32ms)\n"
+" global_tag_depth:<int> Global tag depth for every target\n"
+" on every bus\n"
+" dv:<dv_settings> Set per-controller Domain Validation Setting.\n"
+" seltime:<int> Selection Timeout\n"
+" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
"\n"
" Sample /etc/modules.conf line:\n"
-" Enable verbose logging\n"
-" Disable EISA/VLB probing\n"
-" Set tag depth on Controller 2/Target 2 to 10 tags\n"
-" Shorten the selection timeout to 128ms from its default of 256\n"
+" Toggle EISA/VLB probing\n"
+" Set tag depth on Controller 1/Target 1 to 10 tags\n"
+" Shorten the selection timeout to 128ms\n"
"\n"
-" options aic7xxx='\"verbose.no_probe.tag_info:{{}.{}.{..10}}.seltime:1\"'"
+" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
);
#endif
static void ahc_linux_handle_scsi_status(struct ahc_softc *,
struct ahc_linux_device *,
struct scb *);
-static void ahc_linux_filter_command(struct ahc_softc*, Scsi_Cmnd*,
- struct scb*);
+static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
+ Scsi_Cmnd *cmd);
+static void ahc_linux_filter_inquiry(struct ahc_softc*, struct ahc_devinfo*);
static void ahc_linux_sem_timeout(u_long arg);
-static void ahc_linux_freeze_sim_queue(struct ahc_softc *ahc);
-static void ahc_linux_release_sim_queue(u_long arg);
+static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
+static void ahc_linux_release_simq(u_long arg);
static void ahc_linux_dev_timed_unfreeze(u_long arg);
static int ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag);
static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
-static void ahc_linux_select_queue_depth(struct Scsi_Host *host,
- Scsi_Device *scsi_devs);
+static void ahc_linux_size_nseg(void);
+static void ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc);
+static void ahc_linux_start_dv(struct ahc_softc *ahc);
+static void ahc_linux_dv_timeout(struct scsi_cmnd *cmd);
+static int ahc_linux_dv_thread(void *data);
+static void ahc_linux_kill_dv_thread(struct ahc_softc *ahc);
+static void ahc_linux_dv_target(struct ahc_softc *ahc, u_int target);
+static void ahc_linux_dv_transition(struct ahc_softc *ahc,
+ struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo,
+ struct ahc_linux_target *targ);
+static void ahc_linux_dv_fill_cmd(struct ahc_softc *ahc,
+ struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo);
+static void ahc_linux_dv_inq(struct ahc_softc *ahc,
+ struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo,
+ struct ahc_linux_target *targ,
+ u_int request_length);
+static void ahc_linux_dv_tur(struct ahc_softc *ahc,
+ struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo);
+static void ahc_linux_dv_rebd(struct ahc_softc *ahc,
+ struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo,
+ struct ahc_linux_target *targ);
+static void ahc_linux_dv_web(struct ahc_softc *ahc,
+ struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo,
+ struct ahc_linux_target *targ);
+static void ahc_linux_dv_reb(struct ahc_softc *ahc,
+ struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo,
+ struct ahc_linux_target *targ);
+static void ahc_linux_dv_su(struct ahc_softc *ahc,
+ struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo,
+ struct ahc_linux_target *targ);
+static int ahc_linux_fallback(struct ahc_softc *ahc,
+ struct ahc_devinfo *devinfo);
+static void ahc_linux_dv_complete(Scsi_Cmnd *cmd);
+static void ahc_linux_generate_dv_pattern(struct ahc_linux_target *targ);
static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
struct ahc_devinfo *devinfo);
+static u_int ahc_linux_user_dv_setting(struct ahc_softc *ahc);
static void ahc_linux_device_queue_depth(struct ahc_softc *ahc,
- Scsi_Device *device);
+ struct ahc_linux_device *dev);
static struct ahc_linux_target* ahc_linux_alloc_target(struct ahc_softc*,
u_int, u_int);
static void ahc_linux_free_target(struct ahc_softc*,
@@ -467,34 +551,60 @@
struct ahc_linux_device*);
static void ahc_linux_run_device_queue(struct ahc_softc*,
struct ahc_linux_device*);
-static void ahc_linux_setup_tag_info(char *p, char *end);
-static int ahc_linux_next_unit(void);
+static void ahc_linux_setup_tag_info_global(char *p);
+static aic_option_callback_t ahc_linux_setup_tag_info;
+static aic_option_callback_t ahc_linux_setup_dv;
+static int aic7xxx_setup(char *s);
+static int ahc_linux_next_unit(void);
static void ahc_runq_tasklet(unsigned long data);
-static int ahc_linux_halt(struct notifier_block *nb, u_long event, void *buf);
+static struct ahc_cmd *ahc_linux_run_complete_queue(struct ahc_softc *ahc);
+/********************************* Inlines ************************************/
+static __inline void ahc_schedule_runq(struct ahc_softc *ahc);
static __inline struct ahc_linux_device*
ahc_linux_get_device(struct ahc_softc *ahc, u_int channel,
u_int target, u_int lun, int alloc);
-static __inline void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
- Scsi_Cmnd *cmd);
-static __inline void ahc_linux_run_complete_queue(struct ahc_softc *ahc,
- struct ahc_cmd *acmd);
+static __inline void ahc_schedule_completeq(struct ahc_softc *ahc);
static __inline void ahc_linux_check_device_queue(struct ahc_softc *ahc,
struct ahc_linux_device *dev);
static __inline struct ahc_linux_device *
ahc_linux_next_device_to_run(struct ahc_softc *ahc);
static __inline void ahc_linux_run_device_queues(struct ahc_softc *ahc);
-static __inline void ahc_linux_sniff_command(struct ahc_softc*, Scsi_Cmnd*,
- struct scb*);
static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
struct ahc_dma_seg *sg,
bus_addr_t addr, bus_size_t len);
+static __inline void
+ahc_schedule_completeq(struct ahc_softc *ahc)
+{
+ if ((ahc->platform_data->flags & AHC_RUN_CMPLT_Q_TIMER) == 0) {
+ ahc->platform_data->flags |= AHC_RUN_CMPLT_Q_TIMER;
+ ahc->platform_data->completeq_timer.expires = jiffies;
+ add_timer(&ahc->platform_data->completeq_timer);
+ }
+}
+
+/*
+ * Must be called with our lock held.
+ */
+static __inline void
+ahc_schedule_runq(struct ahc_softc *ahc)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ tasklet_schedule(&ahc->platform_data->runq_tasklet);
+#else
+ /*
+ * Tasklets are not available, so run inline.
+ */
+ ahc_runq_tasklet((unsigned long)ahc);
+#endif
+}
+
static __inline struct ahc_linux_device*
ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target,
- u_int lun, int alloc)
+ u_int lun, int alloc)
{
struct ahc_linux_target *targ;
struct ahc_linux_device *dev;
@@ -518,62 +628,43 @@
return (dev);
}
-static __inline void
-ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd)
+#define AHC_LINUX_MAX_RETURNED_ERRORS 4
+static struct ahc_cmd *
+ahc_linux_run_complete_queue(struct ahc_softc *ahc)
{
- /*
- * Typically, the complete queue has very few entries
- * queued to it before the queue is emptied by
- * ahc_linux_run_complete_queue, so sorting the entries
- * by generation number should be inexpensive.
- * We perform the sort so that commands that complete
- * with an error are retuned in the order origionally
- * queued to the controller so that any subsequent retries
- * are performed in order. The underlying ahc routines do
- * not guarantee the order that aborted commands will be
- * returned to us.
- */
- struct ahc_completeq *completeq;
- struct ahc_cmd *list_cmd;
- struct ahc_cmd *acmd;
-
- /*
- * If we want the request requeued, make sure there
- * are sufficent retries. In the old scsi error code,
- * we used to be able to specify a result code that
- * bypassed the retry count. Now we must use this
- * hack.
- */
- if (cmd->result == (CAM_REQUEUE_REQ << 16))
- cmd->retries--;
- completeq = &ahc->platform_data->completeq;
- list_cmd = TAILQ_FIRST(completeq);
- acmd = (struct ahc_cmd *)cmd;
- while (list_cmd != NULL
- && acmd_scsi_cmd(list_cmd).serial_number
- < acmd_scsi_cmd(acmd).serial_number)
- list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
- if (list_cmd != NULL)
- TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
- else
- TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
-}
-
-static __inline void
-ahc_linux_run_complete_queue(struct ahc_softc *ahc, struct ahc_cmd *acmd)
-{
- u_long done_flags;
+ struct ahc_cmd *acmd;
+ u_long done_flags;
+ int with_errors;
+ with_errors = 0;
ahc_done_lock(ahc, &done_flags);
- while (acmd != NULL) {
+ while ((acmd = TAILQ_FIRST(&ahc->platform_data->completeq)) != NULL) {
Scsi_Cmnd *cmd;
+ if (with_errors > AHC_LINUX_MAX_RETURNED_ERRORS) {
+ /*
+ * Linux uses stack recursion to requeue
+ * commands that need to be retried. Avoid
+ * blowing out the stack by "spoon feeding"
+ * commands that completed with error back
+ * the operating system in case they are going
+ * to be retried. "ick"
+ */
+ ahc_schedule_completeq(ahc);
+ break;
+ }
+ TAILQ_REMOVE(&ahc->platform_data->completeq,
+ acmd, acmd_links.tqe);
cmd = &acmd_scsi_cmd(acmd);
- acmd = TAILQ_NEXT(acmd, acmd_links.tqe);
cmd->host_scribble = NULL;
+ if (ahc_cmd_get_transaction_status(cmd) != DID_OK
+ || (cmd->result & 0xFF) != SCSI_STATUS_OK)
+ with_errors++;
+
cmd->scsi_done(cmd);
}
ahc_done_unlock(ahc, &done_flags);
+ return (acmd);
}
static __inline void
@@ -598,7 +689,8 @@
{
if ((ahc->flags & AHC_RESOURCE_SHORTAGE) != 0
- || ahc->platform_data->qfrozen != 0)
+ || (ahc->platform_data->qfrozen != 0
+ && AHC_DV_SIMQ_FROZEN(ahc) == 0))
return (NULL);
return (TAILQ_FIRST(&ahc->platform_data->device_runq));
}
@@ -616,19 +708,6 @@
}
static __inline void
-ahc_linux_sniff_command(struct ahc_softc *ahc, Scsi_Cmnd *cmd, struct scb *scb)
-{
- /*
- * Determine whether we care to filter
- * information out of this command. If so,
- * pass it on to ahc_linux_filter_command() for more
- * heavy weight processing.
- */
- if (cmd->cmnd[0] == INQUIRY)
- ahc_linux_filter_command(ahc, cmd, scb);
-}
-
-static __inline void
ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
{
Scsi_Cmnd *cmd;
@@ -662,906 +741,2808 @@
consumed = 1;
sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
scb->platform_data->xfer_len += len;
+
if (sizeof(bus_addr_t) > 4
- && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
- /*
- * Due to DAC restrictions, we can't
- * cross a 4GB boundary.
- */
- if ((addr ^ (addr + len - 1)) & ~0xFFFFFFFF) {
- struct ahc_dma_seg *next_sg;
- uint32_t next_len;
-
- printf("Crossed Seg\n");
- if ((scb->sg_count + 2) > AHC_NSEG)
- panic("Too few segs for dma mapping. "
- "Increase AHC_NSEG\n");
-
- consumed++;
- next_sg = sg + 1;
- next_sg->addr = 0;
- next_len = 0x100000000 - (addr & 0xFFFFFFFF);
- len -= next_len;
- next_len |= ((addr >> 8) + 0x1000000) & 0x7F000000;
- next_sg->len = ahc_htole32(next_len);
- }
- len |= (addr >> 8) & 0x7F000000;
- }
+ && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
+ len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
+
sg->len = ahc_htole32(len);
return (consumed);
}
-/**************************** Tasklet Handler *********************************/
+/************************ Host template entry points *************************/
+static int ahc_linux_detect(Scsi_Host_Template *);
+static int ahc_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
+static const char *ahc_linux_info(struct Scsi_Host *);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+static int ahc_linux_slave_alloc(Scsi_Device *);
+static int ahc_linux_slave_configure(Scsi_Device *);
+static void ahc_linux_slave_destroy(Scsi_Device *);
+#if defined(__i386__)
+static int ahc_linux_biosparam(struct scsi_device*,
+ struct block_device*,
+ sector_t, int[]);
+#endif
+#else
+static int ahc_linux_release(struct Scsi_Host *);
+static void ahc_linux_select_queue_depth(struct Scsi_Host *host,
+ Scsi_Device *scsi_devs);
+#if defined(__i386__)
+static int ahc_linux_biosparam(Disk *, kdev_t, int[]);
+#endif
+#endif
+static int ahc_linux_bus_reset(Scsi_Cmnd *);
+static int ahc_linux_dev_reset(Scsi_Cmnd *);
+static int ahc_linux_abort(Scsi_Cmnd *);
+/*
+ * Calculate a safe value for AHC_NSEG (as expressed through ahc_linux_nseg).
+ *
+ * In pre-2.5.X...
+ * The midlayer allocates an S/G array dynamically when a command is issued
+ * using SCSI malloc. This array, which is in an OS dependent format that
+ * must later be copied to our private S/G list, is sized to house just the
+ * number of segments needed for the current transfer. Since the code that
+ * sizes the SCSI malloc pool does not take into consideration fragmentation
+ * of the pool, executing transactions numbering just a fraction of our
+ * concurrent transaction limit with list lengths aproaching AHC_NSEG will
+ * quickly depleat the SCSI malloc pool of usable space. Unfortunately, the
+ * mid-layer does not properly handle this scsi malloc failures for the S/G
+ * array and the result can be a lockup of the I/O subsystem. We try to size
+ * our S/G list so that it satisfies our drivers allocation requirements in
+ * addition to avoiding fragmentation of the SCSI malloc pool.
+ */
static void
-ahc_runq_tasklet(unsigned long data)
+ahc_linux_size_nseg(void)
{
- struct ahc_softc* ahc;
- struct ahc_linux_device *dev;
- u_long flags;
-
- ahc = (struct ahc_softc *)data;
- ahc_lock(ahc, &flags);
- while ((dev = ahc_linux_next_device_to_run(ahc)) != NULL) {
-
- TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links);
- dev->flags &= ~AHC_DEV_ON_RUN_LIST;
- ahc_linux_check_device_queue(ahc, dev);
- /* Yeild to our interrupt handler */
- ahc_unlock(ahc, &flags);
- ahc_lock(ahc, &flags);
- }
- ahc_unlock(ahc, &flags);
-}
-
-/************************ Shutdown/halt/reboot hook ***************************/
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-
-static struct notifier_block ahc_linux_notifier = {
- ahc_linux_halt, NULL, 0
-};
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ u_int cur_size;
+ u_int best_size;
-static int ahc_linux_halt(struct notifier_block *nb, u_long event, void *buf)
-{
- struct ahc_softc *ahc;
+ /*
+ * The SCSI allocator rounds to the nearest 512 bytes
+ * an cannot allocate across a page boundary. Our algorithm
+ * is to start at 1K of scsi malloc space per-command and
+ * loop through all factors of the PAGE_SIZE and pick the best.
+ */
+ best_size = 0;
+ for (cur_size = 1024; cur_size <= PAGE_SIZE; cur_size *= 2) {
+ u_int nseg;
+
+ nseg = cur_size / sizeof(struct scatterlist);
+ if (nseg < AHC_LINUX_MIN_NSEG)
+ continue;
+
+ if (best_size == 0) {
+ best_size = cur_size;
+ ahc_linux_nseg = nseg;
+ } else {
+ u_int best_rem;
+ u_int cur_rem;
- if (event == SYS_DOWN || event == SYS_HALT) {
- TAILQ_FOREACH(ahc, &ahc_tailq, links) {
- ahc_shutdown(ahc);
+ /*
+ * Compare the traits of the current "best_size"
+ * with the current size to determine if the
+ * current size is a better size.
+ */
+ best_rem = best_size % sizeof(struct scatterlist);
+ cur_rem = cur_size % sizeof(struct scatterlist);
+ if (cur_rem < best_rem) {
+ best_size = cur_size;
+ ahc_linux_nseg = nseg;
+ }
}
}
- return (NOTIFY_OK);
+#endif
}
-/******************************** Macros **************************************/
-#define BUILD_SCSIID(ahc, cmd) \
- ((((cmd)->target << TID_SHIFT) & TID) \
- | (((cmd)->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
- | (((cmd)->channel == 0) ? 0 : TWIN_CHNLB))
-
-/******************************** Bus DMA *************************************/
-int
-ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
- bus_size_t alignment, bus_size_t boundary,
- bus_addr_t lowaddr, bus_addr_t highaddr,
- bus_dma_filter_t *filter, void *filterarg,
- bus_size_t maxsize, int nsegments,
- bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
+/*
+ * Try to detect an Adaptec 7XXX controller.
+ */
+static int
+ahc_linux_detect(Scsi_Host_Template *template)
{
- bus_dma_tag_t dmat;
-
- dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
- if (dmat == NULL)
- return (ENOMEM);
+ struct ahc_softc *ahc;
+ int found;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/*
- * Linux is very simplistic about DMA memory. For now don't
- * maintain all specification information. Once Linux supplies
- * better facilities for doing these operations, or the
- * needs of this particular driver change, we might need to do
- * more here.
+ * It is a bug that the upper layer takes
+ * this lock just prior to calling us.
*/
- dmat->alignment = alignment;
- dmat->boundary = boundary;
- dmat->maxsize = maxsize;
- *ret_tag = dmat;
- return (0);
-}
-
-void
-ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
-{
- free(dmat, M_DEVBUF);
-}
-
-int
-ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
- int flags, bus_dmamap_t *mapp)
-{
- bus_dmamap_t map;
+ spin_unlock_irq(&io_request_lock);
+#endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
- map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT);
- if (map == NULL)
- return (ENOMEM);
/*
- * Although we can dma data above 4GB, our
- * "consistent" memory is below 4GB for
- * space efficiency reasons (only need a 4byte
- * address). For this reason, we have to reset
- * our dma mask when doing allocations.
+ * Sanity checking of Linux SCSI data structures so
+ * that some of our hacks^H^H^H^H^Hassumptions aren't
+ * violated.
*/
- if (ahc->dev_softc != NULL) {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,3)
- pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF);
-#else
- ahc->dev_softc->dma_mask = 0xFFFFFFFF;
-#endif
- }
- *vaddr = pci_alloc_consistent(ahc->dev_softc,
- dmat->maxsize, &map->bus_addr);
- if (ahc->dev_softc != NULL) {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,3)
- pci_set_dma_mask(ahc->dev_softc,
- ahc->platform_data->hw_dma_mask);
-#else
- ahc->dev_softc->dma_mask = ahc->platform_data->hw_dma_mask;
-#endif
+ if (offsetof(struct ahc_cmd_internal, end)
+ > offsetof(struct scsi_cmnd, host_scribble)) {
+ printf("ahc_linux_detect: SCSI data structures changed.\n");
+ printf("ahc_linux_detect: Unable to attach\n");
+ return (0);
}
-#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) */
+ ahc_linux_size_nseg();
+#ifdef MODULE
/*
- * At least in 2.2.14, malloc is a slab allocator so all
- * allocations are aligned. We assume for these kernel versions
- * that all allocations will be bellow 4Gig, physically contiguous,
- * and accessable via DMA by the controller.
+ * If we've been passed any parameters, process them now.
*/
- map = NULL; /* No additional information to store */
- *vaddr = malloc(dmat->maxsize, M_DEVBUF, M_NOWAIT);
+ if (aic7xxx)
+ aic7xxx_setup(aic7xxx);
+ if (dummy_buffer[0] != 'P')
+ printk(KERN_WARNING
+"aic7xxx: Please read the file /usr/src/linux/drivers/scsi/README.aic7xxx\n"
+"aic7xxx: to see the proper way to specify options to the aic7xxx module\n"
+"aic7xxx: Specifically, don't use any commas when passing arguments to\n"
+"aic7xxx: insmod or else it might trash certain memory areas.\n");
#endif
- if (*vaddr == NULL)
- return (ENOMEM);
- *mapp = map;
- return(0);
-}
-void
-ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
- void* vaddr, bus_dmamap_t map)
-{
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
- pci_free_consistent(ahc->dev_softc, dmat->maxsize,
- vaddr, map->bus_addr);
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
+ template->proc_name = "aic7xxx";
#else
- free(vaddr, M_DEVBUF);
+ template->proc_dir = &proc_scsi_aic7xxx;
#endif
-}
-int
-ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
- void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
- void *cb_arg, int flags)
-{
/*
- * Assume for now that this will only be used during
- * initialization and not for per-transaction buffer mapping.
+ * Initialize our softc list lock prior to
+ * probing for any adapters.
*/
- bus_dma_segment_t stack_sg;
+ ahc_list_lockinit();
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
- stack_sg.ds_addr = map->bus_addr;
-#else
- stack_sg.ds_addr = VIRT_TO_BUS(buf);
+#ifdef CONFIG_PCI
+ ahc_linux_pci_init();
+#endif
+
+#ifdef CONFIG_EISA
+ ahc_linux_eisa_init();
#endif
- stack_sg.ds_len = dmat->maxsize;
- cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
- return (0);
-}
-void
-ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
-{
/*
- * The map may is NULL in our < 2.3.X implementation.
+ * Register with the SCSI layer all
+ * controllers we've found.
*/
- if (map != NULL)
- free(map, M_DEVBUF);
-}
+ found = 0;
+ TAILQ_FOREACH(ahc, &ahc_tailq, links) {
-int
-ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
-{
- /* Nothing to do */
- return (0);
+ if (ahc_linux_register_host(ahc, template) == 0)
+ found++;
+ }
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ spin_lock_irq(&io_request_lock);
+#endif
+ aic7xxx_detect_complete++;
+ return (found);
}
-/********************* Platform Dependent Functions ***************************/
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+/*
+ * Free the passed in Scsi_Host memory structures prior to unloading the
+ * module.
+ */
int
-ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
+ahc_linux_release(struct Scsi_Host * host)
{
- int value;
- int rvalue;
- int lvalue;
-
- /*
- * Under Linux, cards are ordered as follows:
- * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
- * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
- * 3) All remaining VLB/EISA devices sorted by ioport.
- * 4) All remaining PCI devices sorted by bus/slot/func.
- */
- value = (lahc->flags & AHC_BIOS_ENABLED)
- - (rahc->flags & AHC_BIOS_ENABLED);
- if (value != 0)
- /* Controllers with BIOS enabled have a *higher* priority */
- return (-value);
-
- /*
- * Same BIOS setting, now sort based on bus type.
- * EISA and VL controllers sort together. EISA/VL
- * have higher priority than PCI.
- */
- rvalue = (rahc->chip & AHC_BUS_MASK);
- if (rvalue == AHC_VL)
- rvalue = AHC_EISA;
- lvalue = (lahc->chip & AHC_BUS_MASK);
- if (lvalue == AHC_VL)
- lvalue = AHC_EISA;
- value = lvalue - rvalue;
- if (value != 0)
- return (value);
+ struct ahc_softc *ahc;
+ u_long l;
- /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
- switch (rvalue) {
- case AHC_PCI:
- {
- char primary_channel;
+ ahc_list_lock(&l);
+ if (host != NULL) {
- if (aic7xxx_reverse_scan != 0)
- value = ahc_get_pci_bus(rahc->dev_softc)
- - ahc_get_pci_bus(lahc->dev_softc);
- else
- value = ahc_get_pci_bus(lahc->dev_softc)
- - ahc_get_pci_bus(rahc->dev_softc);
- if (value != 0)
- break;
- if (aic7xxx_reverse_scan != 0)
- value = ahc_get_pci_slot(rahc->dev_softc)
- - ahc_get_pci_slot(lahc->dev_softc);
- else
- value = ahc_get_pci_slot(lahc->dev_softc)
- - ahc_get_pci_slot(rahc->dev_softc);
- if (value != 0)
- break;
/*
- * On multi-function devices, the user can choose
- * to have function 1 probed before function 0.
- * Give whichever channel is the primary channel
- * the lowest priority.
+ * We should be able to just perform
+ * the free directly, but check our
+ * list for extra sanity.
*/
- primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
- value = 1;
- if (lahc->channel == primary_channel)
- value = -1;
- break;
- }
- case AHC_EISA:
- if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
- value = lahc->platform_data->bios_address
- - rahc->platform_data->bios_address;
- } else {
- value = lahc->bsh.ioport
- - rahc->bsh.ioport;
+ ahc = ahc_find_softc(*(struct ahc_softc **)host->hostdata);
+ if (ahc != NULL) {
+ u_long s;
+
+ ahc_lock(ahc, &s);
+ ahc_intr_enable(ahc, FALSE);
+ ahc_unlock(ahc, &s);
+ ahc_free(ahc);
}
- break;
- default:
- panic("ahc_softc_sort: invalid bus type");
}
- return (value);
+ ahc_list_unlock(&l);
+ return (0);
}
+#endif
-static void
-ahc_linux_setup_tag_info(char *p, char *end)
+/*
+ * Return a string describing the driver.
+ */
+static const char *
+ahc_linux_info(struct Scsi_Host *host)
{
- char *base;
- char *tok;
- char *tok_end;
- char *tok_end2;
- int i;
- int instance;
- int targ;
- int done;
- char tok_list[] = {'.', ',', '{', '}', '\0'};
+ static char buffer[512];
+ char ahc_info[256];
+ char *bp;
+ struct ahc_softc *ahc;
- if (*p != ':')
- return;
+ bp = &buffer[0];
+ ahc = *(struct ahc_softc **)host->hostdata;
+ memset(bp, 0, sizeof(buffer));
+ strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
+ strcat(bp, AIC7XXX_DRIVER_VERSION);
+ strcat(bp, "\n");
+ strcat(bp, " <");
+ strcat(bp, ahc->description);
+ strcat(bp, ">\n");
+ strcat(bp, " ");
+ ahc_controller_info(ahc, ahc_info);
+ strcat(bp, ahc_info);
+ strcat(bp, "\n");
- instance = -1;
- targ = -1;
- done = FALSE;
- base = p;
- /* Forward us just past the ':' */
- tok = base + 1;
- tok_end = strchr(tok, '\0');
- if (tok_end < end)
- *tok_end = ',';
- while (!done) {
- switch (*tok) {
- case '{':
- if (instance == -1)
- instance = 0;
- else if (targ == -1)
- targ = 0;
- tok++;
- break;
- case '}':
- if (targ != -1)
- targ = -1;
- else if (instance != -1)
- instance = -1;
- tok++;
- break;
- case ',':
- case '.':
- if (instance == -1)
- done = TRUE;
- else if (targ >= 0)
- targ++;
- else if (instance >= 0)
- instance++;
- if ((targ >= AHC_NUM_TARGETS) ||
- (instance >= NUM_ELEMENTS(aic7xxx_tag_info)))
- done = TRUE;
- tok++;
- if (!done) {
- base = tok;
- }
- break;
- case '\0':
- done = TRUE;
- break;
- default:
- done = TRUE;
- tok_end = strchr(tok, '\0');
- for (i = 0; tok_list[i]; i++) {
- tok_end2 = strchr(tok, tok_list[i]);
- if ((tok_end2) && (tok_end2 < tok_end)) {
- tok_end = tok_end2;
- done = FALSE;
- }
- }
- if ((instance >= 0) && (targ >= 0)
- && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
- && (targ < AHC_NUM_TARGETS)) {
- aic7xxx_tag_info[instance].tag_commands[targ] =
- simple_strtoul(tok, NULL, 0) & 0xff;
- }
- tok = tok_end;
- break;
- }
- }
- while ((p != base) && (p != NULL))
- p = strtok(NULL, ",.");
+ return (bp);
}
/*
- * Handle Linux boot parameters. This routine allows for assigning a value
- * to a parameter with a ':' between the parameter and the value.
- * ie. aic7xxx=stpwlev:1,extended
+ * Queue an SCB to the controller.
*/
-int
-aic7xxx_setup(char *s)
+static int
+ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
{
- int i, n;
- char *p;
- char *end;
+ struct ahc_softc *ahc;
+ struct ahc_linux_device *dev;
+ u_long flags;
- static struct {
- const char *name;
- uint32_t *flag;
- } options[] = {
- { "extended", &aic7xxx_extended },
- { "no_reset", &aic7xxx_no_reset },
- { "verbose", &aic7xxx_verbose },
- { "reverse_scan", &aic7xxx_reverse_scan },
- { "no_probe", &aic7xxx_no_probe },
- { "periodic_otag", &aic7xxx_periodic_otag },
- { "pci_parity", &aic7xxx_pci_parity },
- { "seltime", &aic7xxx_seltime },
- { "tag_info", NULL }
- };
+ ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
- end = strchr(s, '\0');
+ /*
+ * Save the callback on completion function.
+ */
+ cmd->scsi_done = scsi_done;
- for (p = strtok(s, ",."); p; p = strtok(NULL, ",.")) {
- for (i = 0; i < NUM_ELEMENTS(options); i++) {
- n = strlen(options[i].name);
+ ahc_midlayer_entrypoint_lock(ahc, &flags);
- if (strncmp(options[i].name, p, n) != 0)
- continue;
+ /*
+ * Close the race of a command that was in the process of
+ * being queued to us just as our simq was frozen. Let
+ * DV commands through so long as we are only frozen to
+ * perform DV.
+ */
+ if (ahc->platform_data->qfrozen != 0
+ && AHC_DV_CMD(cmd) == 0) {
- if (strncmp(p, "tag_info", n) == 0) {
- ahc_linux_setup_tag_info(p + n, end);
- } else if (p[n] == ':') {
- *(options[i].flag) =
- simple_strtoul(p + n + 1, NULL, 0);
- } else if (!strncmp(p, "verbose", n)) {
- *(options[i].flag) = 1;
- } else {
- *(options[i].flag) = ~(*(options[i].flag));
- }
- break;
- }
+ ahc_cmd_set_transaction_status(cmd, CAM_REQUEUE_REQ);
+ ahc_linux_queue_cmd_complete(ahc, cmd);
+ ahc_schedule_completeq(ahc);
+ ahc_midlayer_entrypoint_unlock(ahc, &flags);
+ return (0);
}
- return 1;
+ dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
+ cmd->device->lun, /*alloc*/TRUE);
+ if (dev == NULL) {
+ ahc_cmd_set_transaction_status(cmd, CAM_RESRC_UNAVAIL);
+ ahc_linux_queue_cmd_complete(ahc, cmd);
+ ahc_schedule_completeq(ahc);
+ ahc_midlayer_entrypoint_unlock(ahc, &flags);
+ printf("%s: aic7xxx_linux_queue - Unable to allocate device!\n",
+ ahc_name(ahc));
+ return (0);
+ }
+ cmd->result = CAM_REQ_INPROG << 16;
+ TAILQ_INSERT_TAIL(&dev->busyq, (struct ahc_cmd *)cmd, acmd_links.tqe);
+ if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
+ TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
+ dev->flags |= AHC_DEV_ON_RUN_LIST;
+ ahc_linux_run_device_queues(ahc);
+ }
+ ahc_midlayer_entrypoint_unlock(ahc, &flags);
+ return (0);
}
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
-__setup("aic7xxx=", aic7xxx_setup);
-#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+static int
+ahc_linux_slave_alloc(Scsi_Device *device)
+{
+ struct ahc_softc *ahc;
-int aic7xxx_verbose;
+ ahc = *((struct ahc_softc **)device->host->hostdata);
+ if (bootverbose)
+ printf("%s: Slave Alloc %d\n", ahc_name(ahc), device->id);
+ return (0);
+}
-/*
- * Try to detect an Adaptec 7XXX controller.
- */
-int
-ahc_linux_detect(Scsi_Host_Template *template)
+static int
+ahc_linux_slave_configure(Scsi_Device *device)
{
struct ahc_softc *ahc;
- int found;
+ struct ahc_linux_device *dev;
+ u_long flags;
+ ahc = *((struct ahc_softc **)device->host->hostdata);
+ if (bootverbose)
+ printf("%s: Slave Configure %d\n", ahc_name(ahc), device->id);
+ ahc_midlayer_entrypoint_lock(ahc, &flags);
/*
- * It is a bug that the upper layer takes
- * this lock just prior to calling us.
+ * Since Linux has attached to the device, configure
+ * it so we don't free and allocate the device
+ * structure on every command.
*/
- spin_unlock_irq(&io_request_lock);
+ dev = ahc_linux_get_device(ahc, device->channel,
+ device->id, device->lun,
+ /*alloc*/TRUE);
+ if (dev != NULL) {
+ dev->flags &= ~AHC_DEV_UNCONFIGURED;
+ dev->scsi_device = device;
+ ahc_linux_device_queue_depth(ahc, dev);
+ }
+ ahc_midlayer_entrypoint_unlock(ahc, &flags);
+ return (0);
+}
+
+static void
+ahc_linux_slave_destroy(Scsi_Device *device)
+{
+ struct ahc_softc *ahc;
+ struct ahc_linux_device *dev;
+ u_long flags;
+ ahc = *((struct ahc_softc **)device->host->hostdata);
+ if (bootverbose)
+ printf("%s: Slave Destroy %d\n", ahc_name(ahc), device->id);
+ ahc_midlayer_entrypoint_lock(ahc, &flags);
+ dev = ahc_linux_get_device(ahc, device->channel,
+ device->id, device->lun,
+ /*alloc*/FALSE);
/*
- * Sanity checking of Linux SCSI data structures so
- * that some of our hacks^H^H^H^H^Hassumptions aren't
- * violated.
+ * Filter out "silly" deletions of real devices by only
+ * deleting devices that have had slave_configure()
+ * called on them. All other devices that have not
+ * been configured will automatically be deleted by
+ * the refcounting process.
*/
- if (offsetof(struct ahc_cmd_internal, end)
- > offsetof(struct scsi_cmnd, host_scribble)) {
- printf("ahc_linux_detect: SCSI data structures changed.\n");
- printf("ahc_linux_detect: Unable to attach\n");
- return (0);
+ if (dev != NULL
+ && (dev->flags & AHC_DEV_SLAVE_CONFIGURED) != 0) {
+ dev->flags |= AHC_DEV_UNCONFIGURED;
+ if (TAILQ_EMPTY(&dev->busyq)
+ && dev->active == 0
+ && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
+ ahc_linux_free_device(ahc, dev);
}
-#ifdef MODULE
- /*
- * If we've been passed any parameters, process them now.
- */
- if (aic7xxx)
- aic7xxx_setup(aic7xxx);
- if (dummy_buffer[0] != 'P')
- printk(KERN_WARNING
-"aic7xxx: Please read the file /usr/src/linux/drivers/scsi/README.aic7xxx\n"
-"aic7xxx: to see the proper way to specify options to the aic7xxx module\n"
-"aic7xxx: Specifically, don't use any commas when passing arguments to\n"
-"aic7xxx: insmod or else it might trash certain memory areas.\n");
+ ahc_midlayer_entrypoint_unlock(ahc, &flags);
+}
+#else
+/*
+ * Sets the queue depth for each SCSI device hanging
+ * off the input host adapter.
+ */
+static void
+ahc_linux_select_queue_depth(struct Scsi_Host *host, Scsi_Device *scsi_devs)
+{
+ Scsi_Device *device;
+ Scsi_Device *ldev;
+ struct ahc_softc *ahc;
+ u_long flags;
+
+ ahc = *((struct ahc_softc **)host->hostdata);
+ ahc_lock(ahc, &flags);
+ for (device = scsi_devs; device != NULL; device = device->next) {
+
+ /*
+ * Watch out for duplicate devices. This works around
+ * some quirks in how the SCSI scanning code does its
+ * device management.
+ */
+ for (ldev = scsi_devs; ldev != device; ldev = ldev->next) {
+ if (ldev->host == device->host
+ && ldev->channel == device->channel
+ && ldev->id == device->id
+ && ldev->lun == device->lun)
+ break;
+ }
+ /* Skip duplicate. */
+ if (ldev != device)
+ continue;
+
+ if (device->host == host) {
+ struct ahc_linux_device *dev;
+
+ /*
+ * Since Linux has attached to the device, configure
+ * it so we don't free and allocate the device
+ * structure on every command.
+ */
+ dev = ahc_linux_get_device(ahc, device->channel,
+ device->id, device->lun,
+ /*alloc*/TRUE);
+ if (dev != NULL) {
+ dev->flags &= ~AHC_DEV_UNCONFIGURED;
+ dev->scsi_device = device;
+ ahc_linux_device_queue_depth(ahc, dev);
+ device->queue_depth = dev->openings
+ + dev->active;
+ if ((dev->flags & (AHC_DEV_Q_BASIC
+ | AHC_DEV_Q_TAGGED)) == 0) {
+ /*
+ * We allow the OS to queue 2 untagged
+ * transactions to us at any time even
+ * though we can only execute them
+ * serially on the controller/device.
+ * This should remove some latency.
+ */
+ device->queue_depth = 2;
+ }
+ }
+ }
+ }
+ ahc_unlock(ahc, &flags);
+}
#endif
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
- template->proc_name = "aic7xxx";
+#if defined(__i386__)
+/*
+ * Return the disk geometry for the given SCSI device.
+ */
+static int
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
+ sector_t capacity, int geom[])
+{
+ uint8_t *bh;
#else
- template->proc_dir = &proc_scsi_aic7xxx;
+ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
+{
+ struct scsi_device *sdev = disk->device;
+ u_long capacity = disk->capacity;
+ struct buffer_head *bh;
+#endif
+ int heads;
+ int sectors;
+ int cylinders;
+ int ret;
+ int extended;
+ struct ahc_softc *ahc;
+ u_int channel;
+
+ ahc = *((struct ahc_softc **)sdev->host->hostdata);
+ channel = sdev->channel;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ bh = scsi_bios_ptable(bdev);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17)
+ bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev));
+#else
+ bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024);
+#endif
+
+ if (bh) {
+ ret = scsi_partsize(bh, capacity,
+ &geom[2], &geom[0], &geom[1]);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ kfree(bh);
+#else
+ brelse(bh);
+#endif
+ if (ret != -1)
+ return (ret);
+ }
+ heads = 64;
+ sectors = 32;
+ cylinders = aic_sector_div(capacity, heads, sectors);
+
+ if (aic7xxx_extended != 0)
+ extended = 1;
+ else if (channel == 0)
+ extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
+ else
+ extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
+ if (extended && cylinders >= 1024) {
+ heads = 255;
+ sectors = 63;
+ cylinders = aic_sector_div(capacity, heads, sectors);
+ }
+ geom[0] = heads;
+ geom[1] = sectors;
+ geom[2] = cylinders;
+ return (0);
+}
#endif
+/*
+ * Abort the current SCSI command(s).
+ */
+static int
+ahc_linux_abort(Scsi_Cmnd *cmd)
+{
+ int error;
+
+ error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
+ if (error != 0)
+ printf("aic7xxx_abort returns 0x%x\n", error);
+ return (error);
+}
+
+/*
+ * Attempt to send a target reset message to the device that timed out.
+ */
+static int
+ahc_linux_dev_reset(Scsi_Cmnd *cmd)
+{
+ int error;
+
+ error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
+ if (error != 0)
+ printf("aic7xxx_dev_reset returns 0x%x\n", error);
+ return (error);
+}
+
+/*
+ * Reset the SCSI bus.
+ */
+static int
+ahc_linux_bus_reset(Scsi_Cmnd *cmd)
+{
+ struct ahc_softc *ahc;
+ u_long s;
+ int found;
+
+ ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
+ ahc_midlayer_entrypoint_lock(ahc, &s);
+ found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
+ /*initiate reset*/TRUE);
+ ahc_linux_run_complete_queue(ahc);
+ ahc_midlayer_entrypoint_unlock(ahc, &s);
+
+ if (bootverbose)
+ printf("%s: SCSI bus reset delivered. "
+ "%d SCBs aborted.\n", ahc_name(ahc), found);
+
+ return SUCCESS;
+}
+
+Scsi_Host_Template aic7xxx_driver_template = {
+ .module = THIS_MODULE,
+ .name = "aic7xxx",
+ .proc_info = ahc_linux_proc_info,
+ .info = ahc_linux_info,
+ .queuecommand = ahc_linux_queue,
+ .eh_abort_handler = ahc_linux_abort,
+ .eh_device_reset_handler = ahc_linux_dev_reset,
+ .eh_bus_reset_handler = ahc_linux_bus_reset,
+#if defined(__i386__)
+ .bios_param = ahc_linux_biosparam,
+#endif
+ .can_queue = AHC_MAX_QUEUE,
+ .this_id = -1,
+ .cmd_per_lun = 2,
+ .use_clustering = ENABLE_CLUSTERING,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,7)
/*
* We can only map 16MB per-SG
* so create a sector limit of
* "16MB" in 2K sectors.
*/
- template->max_sectors = 8192;
+ .max_sectors = 8192,
#endif
-
- /*
- * Initialize our softc list lock prior to
- * probing for any adapters.
- */
- ahc_list_lockinit();
-
-#ifdef CONFIG_PCI
- ahc_linux_pci_probe(template);
+#if defined CONFIG_HIGHIO || LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,10)
+/* Assume RedHat Distribution with its different HIGHIO conventions. */
+ .can_dma_32 = 1,
+ .single_sg_okay = 1,
+#else
+ .highmem_io = 1,
+#endif
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ .slave_alloc = ahc_linux_slave_alloc,
+ .slave_configure = ahc_linux_slave_configure,
+ .slave_destroy = ahc_linux_slave_destroy,
+#else
+ .detect = ahc_linux_detect,
+ .release = ahc_linux_release,
+ .select_queue_depths = ahc_linux_select_queue_depth,
+ .use_new_eh_code = 1,
#endif
+};
- if (aic7xxx_no_probe == 0)
- aic7770_linux_probe(template);
+/**************************** Tasklet Handler *********************************/
- /*
- * Register with the SCSI layer all
- * controllers we've found.
- */
- spin_lock_irq(&io_request_lock);
- found = 0;
- TAILQ_FOREACH(ahc, &ahc_tailq, links) {
+/*
+ * In 2.4.X and above, this routine is called from a tasklet,
+ * so we must re-acquire our lock prior to executing this code.
+ * In all prior kernels, ahc_schedule_runq() calls this routine
+ * directly and ahc_schedule_runq() is called with our lock held.
+ */
+static void
+ahc_runq_tasklet(unsigned long data)
+{
+ struct ahc_softc* ahc;
+ struct ahc_linux_device *dev;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ u_long flags;
+#endif
- if (ahc_linux_register_host(ahc, template) == 0)
- found++;
+ ahc = (struct ahc_softc *)data;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ ahc_lock(ahc, &flags);
+#endif
+ while ((dev = ahc_linux_next_device_to_run(ahc)) != NULL) {
+
+ TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links);
+ dev->flags &= ~AHC_DEV_ON_RUN_LIST;
+ ahc_linux_check_device_queue(ahc, dev);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ /* Yeild to our interrupt handler */
+ ahc_unlock(ahc, &flags);
+ ahc_lock(ahc, &flags);
+#endif
}
- aic7xxx_detect_complete++;
- return (found);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ ahc_unlock(ahc, &flags);
+#endif
}
+/******************************** Macros **************************************/
+#define BUILD_SCSIID(ahc, cmd) \
+ ((((cmd)->device->id << TID_SHIFT) & TID) \
+ | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
+ | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
+
+/******************************** Bus DMA *************************************/
int
-ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
+ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
+ bus_size_t alignment, bus_size_t boundary,
+ bus_addr_t lowaddr, bus_addr_t highaddr,
+ bus_dma_filter_t *filter, void *filterarg,
+ bus_size_t maxsize, int nsegments,
+ bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
{
- char buf[80];
- struct Scsi_Host *host;
- char *new_name;
- u_long s;
-
+ bus_dma_tag_t dmat;
- template->name = ahc->description;
- host = scsi_register(template, sizeof(struct ahc_softc *));
- if (host == NULL)
+ dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
+ if (dmat == NULL)
return (ENOMEM);
- ahc_lock(ahc, &s);
- *((struct ahc_softc **)host->hostdata) = ahc;
- ahc->platform_data->host = host;
- host->can_queue = AHC_MAX_QUEUE;
- host->cmd_per_lun = 2;
- host->sg_tablesize = AHC_NSEG;
- host->select_queue_depths = ahc_linux_select_queue_depth;
- /* XXX No way to communicate the ID for multiple channels */
- host->this_id = ahc->our_id;
- host->irq = ahc->platform_data->irq;
- host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
- host->max_lun = AHC_NUM_LUNS;
- host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
- ahc_set_unit(ahc, ahc_linux_next_unit());
- sprintf(buf, "scsi%d", host->host_no);
- new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
- if (new_name != NULL) {
- strcpy(new_name, buf);
- ahc_set_name(ahc, new_name);
- }
- host->unique_id = ahc->unit;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,4)
- scsi_set_pci_device(host, ahc->dev_softc);
-#endif
- ahc_linux_initialize_scsi_bus(ahc);
- ahc_unlock(ahc, &s);
+ /*
+ * Linux is very simplistic about DMA memory. For now don't
+ * maintain all specification information. Once Linux supplies
+ * better facilities for doing these operations, or the
+ * needs of this particular driver change, we might need to do
+ * more here.
+ */
+ dmat->alignment = alignment;
+ dmat->boundary = boundary;
+ dmat->maxsize = maxsize;
+ *ret_tag = dmat;
return (0);
}
-uint64_t
-ahc_linux_get_memsize()
+void
+ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
{
- struct sysinfo si;
-
- si_meminfo(&si);
- return (si.totalram << PAGE_SHIFT);
+ free(dmat, M_DEVBUF);
}
-/*
- * Find the smallest available unit number to use
- * for a new device. We don't just use a static
- * count to handle the "repeated hot-(un)plug"
- * scenario.
- */
-static int
-ahc_linux_next_unit()
+int
+ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
+ int flags, bus_dmamap_t *mapp)
{
- struct ahc_softc *ahc;
- int unit;
+ bus_dmamap_t map;
- unit = 0;
-retry:
- TAILQ_FOREACH(ahc, &ahc_tailq, links) {
- if (ahc->unit == unit) {
- unit++;
- goto retry;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+ map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT);
+ if (map == NULL)
+ return (ENOMEM);
+ /*
+ * Although we can dma data above 4GB, our
+ * "consistent" memory is below 4GB for
+ * space efficiency reasons (only need a 4byte
+ * address). For this reason, we have to reset
+ * our dma mask when doing allocations.
+ */
+ if (ahc->dev_softc != NULL)
+ ahc_pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF);
+ *vaddr = pci_alloc_consistent(ahc->dev_softc,
+ dmat->maxsize, &map->bus_addr);
+ if (ahc->dev_softc != NULL)
+ ahc_pci_set_dma_mask(ahc->dev_softc,
+ ahc->platform_data->hw_dma_mask);
+#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) */
+ /*
+ * At least in 2.2.14, malloc is a slab allocator so all
+ * allocations are aligned. We assume for these kernel versions
+ * that all allocations will be bellow 4Gig, physically contiguous,
+ * and accessible via DMA by the controller.
+ */
+ map = NULL; /* No additional information to store */
+ *vaddr = malloc(dmat->maxsize, M_DEVBUF, M_NOWAIT);
+#endif
+ if (*vaddr == NULL)
+ return (ENOMEM);
+ *mapp = map;
+ return(0);
+}
+
+void
+ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
+ void* vaddr, bus_dmamap_t map)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+ pci_free_consistent(ahc->dev_softc, dmat->maxsize,
+ vaddr, map->bus_addr);
+#else
+ free(vaddr, M_DEVBUF);
+#endif
+}
+
+int
+ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
+ void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
+ void *cb_arg, int flags)
+{
+ /*
+ * Assume for now that this will only be used during
+ * initialization and not for per-transaction buffer mapping.
+ */
+ bus_dma_segment_t stack_sg;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+ stack_sg.ds_addr = map->bus_addr;
+#else
+#define VIRT_TO_BUS(a) (uint32_t)virt_to_bus((void *)(a))
+ stack_sg.ds_addr = VIRT_TO_BUS(buf);
+#endif
+ stack_sg.ds_len = dmat->maxsize;
+ cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
+ return (0);
+}
+
+void
+ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
+{
+ /*
+ * The map may is NULL in our < 2.3.X implementation.
+ */
+ if (map != NULL)
+ free(map, M_DEVBUF);
+}
+
+int
+ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
+{
+ /* Nothing to do */
+ return (0);
+}
+
+/********************* Platform Dependent Functions ***************************/
+/*
+ * Compare "left hand" softc with "right hand" softc, returning:
+ * < 0 - lahc has a lower priority than rahc
+ * 0 - Softcs are equal
+ * > 0 - lahc has a higher priority than rahc
+ */
+int
+ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
+{
+ int value;
+ int rvalue;
+ int lvalue;
+
+ /*
+ * Under Linux, cards are ordered as follows:
+ * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
+ * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
+ * 3) All remaining VLB/EISA devices sorted by ioport.
+ * 4) All remaining PCI devices sorted by bus/slot/func.
+ */
+ value = (lahc->flags & AHC_BIOS_ENABLED)
+ - (rahc->flags & AHC_BIOS_ENABLED);
+ if (value != 0)
+ /* Controllers with BIOS enabled have a *higher* priority */
+ return (value);
+
+ /*
+ * Same BIOS setting, now sort based on bus type.
+ * EISA and VL controllers sort together. EISA/VL
+ * have higher priority than PCI.
+ */
+ rvalue = (rahc->chip & AHC_BUS_MASK);
+ if (rvalue == AHC_VL)
+ rvalue = AHC_EISA;
+ lvalue = (lahc->chip & AHC_BUS_MASK);
+ if (lvalue == AHC_VL)
+ lvalue = AHC_EISA;
+ value = rvalue - lvalue;
+ if (value != 0)
+ return (value);
+
+ /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
+ switch (rvalue) {
+ case AHC_PCI:
+ {
+ char primary_channel;
+
+ if (aic7xxx_reverse_scan != 0)
+ value = ahc_get_pci_bus(lahc->dev_softc)
+ - ahc_get_pci_bus(rahc->dev_softc);
+ else
+ value = ahc_get_pci_bus(rahc->dev_softc)
+ - ahc_get_pci_bus(lahc->dev_softc);
+ if (value != 0)
+ break;
+ if (aic7xxx_reverse_scan != 0)
+ value = ahc_get_pci_slot(lahc->dev_softc)
+ - ahc_get_pci_slot(rahc->dev_softc);
+ else
+ value = ahc_get_pci_slot(rahc->dev_softc)
+ - ahc_get_pci_slot(lahc->dev_softc);
+ if (value != 0)
+ break;
+ /*
+ * On multi-function devices, the user can choose
+ * to have function 1 probed before function 0.
+ * Give whichever channel is the primary channel
+ * the highest priority.
+ */
+ primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
+ value = -1;
+ if (lahc->channel == primary_channel)
+ value = 1;
+ break;
+ }
+ case AHC_EISA:
+ if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
+ value = rahc->platform_data->bios_address
+ - lahc->platform_data->bios_address;
+ } else {
+ value = rahc->bsh.ioport
+ - lahc->bsh.ioport;
+ }
+ break;
+ default:
+ panic("ahc_softc_sort: invalid bus type");
+ }
+ return (value);
+}
+
+static void
+ahc_linux_setup_tag_info_global(char *p)
+{
+ int tags, i, j;
+
+ tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
+ printf("Setting Global Tags= %d\n", tags);
+
+ for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
+ for (j = 0; j < AHC_NUM_TARGETS; j++) {
+ aic7xxx_tag_info[i].tag_commands[j] = tags;
+ }
+ }
+}
+
+static void
+ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
+{
+
+ if ((instance >= 0) && (targ >= 0)
+ && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
+ && (targ < AHC_NUM_TARGETS)) {
+ aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
+ if (bootverbose)
+ printf("tag_info[%d:%d] = %d\n", instance, targ, value);
+ }
+}
+
+static void
+ahc_linux_setup_dv(u_long arg, int instance, int targ, int32_t value)
+{
+
+ if ((instance >= 0)
+ && (instance < NUM_ELEMENTS(aic7xxx_dv_settings))) {
+ aic7xxx_dv_settings[instance] = value;
+ if (bootverbose)
+ printf("dv[%d] = %d\n", instance, value);
+ }
+}
+
+/*
+ * Handle Linux boot parameters. This routine allows for assigning a value
+ * to a parameter with a ':' between the parameter and the value.
+ * ie. aic7xxx=stpwlev:1,extended
+ */
+static int
+aic7xxx_setup(char *s)
+{
+ int i, n;
+ char *p;
+ char *end;
+
+ static struct {
+ const char *name;
+ uint32_t *flag;
+ } options[] = {
+ { "extended", &aic7xxx_extended },
+ { "no_reset", &aic7xxx_no_reset },
+ { "verbose", &aic7xxx_verbose },
+ { "allow_memio", &aic7xxx_allow_memio},
+#ifdef AHC_DEBUG
+ { "debug", &ahc_debug },
+#endif
+ { "reverse_scan", &aic7xxx_reverse_scan },
+ { "no_probe", &aic7xxx_probe_eisa_vl },
+ { "probe_eisa_vl", &aic7xxx_probe_eisa_vl },
+ { "periodic_otag", &aic7xxx_periodic_otag },
+ { "pci_parity", &aic7xxx_pci_parity },
+ { "seltime", &aic7xxx_seltime },
+ { "tag_info", NULL },
+ { "global_tag_depth", NULL },
+ { "dv", NULL }
+ };
+
+ end = strchr(s, '\0');
+
+ /*
+ * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
+ * will never be 0 in this case.
+ */
+ n = 0;
+
+ while ((p = strsep(&s, ",.")) != NULL) {
+ if (*p == '\0')
+ continue;
+ for (i = 0; i < NUM_ELEMENTS(options); i++) {
+
+ n = strlen(options[i].name);
+ if (strncmp(options[i].name, p, n) == 0)
+ break;
+ }
+ if (i == NUM_ELEMENTS(options))
+ continue;
+
+ if (strncmp(p, "global_tag_depth", n) == 0) {
+ ahc_linux_setup_tag_info_global(p + n);
+ } else if (strncmp(p, "tag_info", n) == 0) {
+ s = aic_parse_brace_option("tag_info", p + n, end,
+ 2, ahc_linux_setup_tag_info, 0);
+ } else if (strncmp(p, "dv", n) == 0) {
+ s = aic_parse_brace_option("dv", p + n, end, 1,
+ ahc_linux_setup_dv, 0);
+ } else if (p[n] == ':') {
+ *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
+ } else if (strncmp(p, "verbose", n) == 0) {
+ *(options[i].flag) = 1;
+ } else {
+ *(options[i].flag) ^= 0xFFFFFFFF;
+ }
+ }
+ return 1;
+}
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
+__setup("aic7xxx=", aic7xxx_setup);
+#endif
+
+uint32_t aic7xxx_verbose;
+
+int
+ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
+{
+ char buf[80];
+ struct Scsi_Host *host;
+ char *new_name;
+ u_long s;
+ u_int targ_offset;
+
+ template->name = ahc->description;
+ host = scsi_register(template, sizeof(struct ahc_softc *));
+ if (host == NULL)
+ return (ENOMEM);
+
+ *((struct ahc_softc **)host->hostdata) = ahc;
+ ahc_lock(ahc, &s);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ scsi_assign_lock(host, &ahc->platform_data->spin_lock);
+#elif AHC_SCSI_HAS_HOST_LOCK != 0
+ host->lock = &ahc->platform_data->spin_lock;
+#endif
+ ahc->platform_data->host = host;
+ host->can_queue = AHC_MAX_QUEUE;
+ host->cmd_per_lun = 2;
+ /* XXX No way to communicate the ID for multiple channels */
+ host->this_id = ahc->our_id;
+ host->irq = ahc->platform_data->irq;
+ host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
+ host->max_lun = AHC_NUM_LUNS;
+ host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
+ host->sg_tablesize = AHC_NSEG;
+ ahc_set_unit(ahc, ahc_linux_next_unit());
+ sprintf(buf, "scsi%d", host->host_no);
+ new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
+ if (new_name != NULL) {
+ strcpy(new_name, buf);
+ ahc_set_name(ahc, new_name);
+ }
+ host->unique_id = ahc->unit;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,4) && \
+ LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ scsi_set_pci_device(host, ahc->dev_softc);
+#endif
+ ahc_linux_initialize_scsi_bus(ahc);
+ ahc_unlock(ahc, &s);
+ ahc->platform_data->dv_pid = kernel_thread(ahc_linux_dv_thread, ahc, 0);
+ ahc_lock(ahc, &s);
+ if (ahc->platform_data->dv_pid < 0) {
+ printf("%s: Failed to create DV thread, error= %d\n",
+ ahc_name(ahc), ahc->platform_data->dv_pid);
+ return (-ahc->platform_data->dv_pid);
+ }
+ /*
+ * Initially allocate *all* of our linux target objects
+ * so that the DV thread will scan them all in parallel
+ * just after driver initialization. Any device that
+ * does not exist will have its target object destroyed
+ * by the selection timeout handler. In the case of a
+ * device that appears after the initial DV scan, async
+ * negotiation will occur for the first command, and DV
+ * will comence should that first command be successful.
+ */
+ for (targ_offset = 0;
+ targ_offset < host->max_id * (host->max_channel + 1);
+ targ_offset++) {
+ u_int channel;
+ u_int target;
+
+ channel = 0;
+ target = targ_offset;
+ if (target > 7
+ && (ahc->features & AHC_TWIN) != 0) {
+ channel = 1;
+ target &= 0x7;
+ }
+ /*
+ * Skip our own ID. Some Compaq/HP storage devices
+ * have enclosure management devices that respond to
+ * single bit selection (i.e. selecting ourselves).
+ * It is expected that either an external application
+ * or a modified kernel will be used to probe this
+ * ID if it is appropriate. To accommodate these
+ * installations, ahc_linux_alloc_target() will allocate
+ * for our ID if asked to do so.
+ */
+ if ((channel == 0 && target == ahc->our_id)
+ || (channel == 1 && target == ahc->our_id_b))
+ continue;
+
+ ahc_linux_alloc_target(ahc, channel, target);
+ }
+ ahc_intr_enable(ahc, TRUE);
+ ahc_linux_start_dv(ahc);
+ ahc_unlock(ahc, &s);
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
+#endif
+ return (0);
+}
+
+uint64_t
+ahc_linux_get_memsize(void)
+{
+ struct sysinfo si;
+
+ si_meminfo(&si);
+ return ((uint64_t)si.totalram << PAGE_SHIFT);
+}
+
+/*
+ * Find the smallest available unit number to use
+ * for a new device. We don't just use a static
+ * count to handle the "repeated hot-(un)plug"
+ * scenario.
+ */
+static int
+ahc_linux_next_unit(void)
+{
+ struct ahc_softc *ahc;
+ int unit;
+
+ unit = 0;
+retry:
+ TAILQ_FOREACH(ahc, &ahc_tailq, links) {
+ if (ahc->unit == unit) {
+ unit++;
+ goto retry;
+ }
+ }
+ return (unit);
+}
+
+/*
+ * Place the SCSI bus into a known state by either resetting it,
+ * or forcing transfer negotiations on the next command to any
+ * target.
+ */
+void
+ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
+{
+ int i;
+ int numtarg;
+
+ i = 0;
+ numtarg = 0;
+
+ if (aic7xxx_no_reset != 0)
+ ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
+
+ if ((ahc->flags & AHC_RESET_BUS_A) != 0)
+ ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
+ else
+ numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
+
+ if ((ahc->features & AHC_TWIN) != 0) {
+
+ if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
+ ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
+ } else {
+ if (numtarg == 0)
+ i = 8;
+ numtarg += 8;
+ }
+ }
+
+ /*
+ * Force negotiation to async for all targets that
+ * will not see an initial bus reset.
+ */
+ for (; i < numtarg; i++) {
+ struct ahc_devinfo devinfo;
+ struct ahc_initiator_tinfo *tinfo;
+ struct ahc_tmode_tstate *tstate;
+ u_int our_id;
+ u_int target_id;
+ char channel;
+
+ channel = 'A';
+ our_id = ahc->our_id;
+ target_id = i;
+ if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
+ channel = 'B';
+ our_id = ahc->our_id_b;
+ target_id = i % 8;
+ }
+ tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
+ target_id, &tstate);
+ ahc_compile_devinfo(&devinfo, our_id, target_id,
+ CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
+ ahc_update_neg_request(ahc, &devinfo, tstate,
+ tinfo, AHC_NEG_ALWAYS);
+ }
+ /* Give the bus some time to recover */
+ if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
+ ahc_linux_freeze_simq(ahc);
+ init_timer(&ahc->platform_data->reset_timer);
+ ahc->platform_data->reset_timer.data = (u_long)ahc;
+ ahc->platform_data->reset_timer.expires =
+ jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
+ ahc->platform_data->reset_timer.function =
+ ahc_linux_release_simq;
+ add_timer(&ahc->platform_data->reset_timer);
+ }
+}
+
+int
+ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
+{
+
+ ahc->platform_data =
+ malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
+ if (ahc->platform_data == NULL)
+ return (ENOMEM);
+ memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
+ TAILQ_INIT(&ahc->platform_data->completeq);
+ TAILQ_INIT(&ahc->platform_data->device_runq);
+ ahc->platform_data->irq = AHC_LINUX_NOIRQ;
+ ahc->platform_data->hw_dma_mask = 0xFFFFFFFF;
+ ahc_lockinit(ahc);
+ ahc_done_lockinit(ahc);
+ init_timer(&ahc->platform_data->completeq_timer);
+ ahc->platform_data->completeq_timer.data = (u_long)ahc;
+ ahc->platform_data->completeq_timer.function =
+ (ahc_linux_callback_t *)ahc_linux_thread_run_complete_queue;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+ init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
+ init_MUTEX_LOCKED(&ahc->platform_data->dv_sem);
+ init_MUTEX_LOCKED(&ahc->platform_data->dv_cmd_sem);
+#else
+ ahc->platform_data->eh_sem = MUTEX_LOCKED;
+ ahc->platform_data->dv_sem = MUTEX_LOCKED;
+ ahc->platform_data->dv_cmd_sem = MUTEX_LOCKED;
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ tasklet_init(&ahc->platform_data->runq_tasklet, ahc_runq_tasklet,
+ (unsigned long)ahc);
+#endif
+ ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
+ ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
+ if (aic7xxx_pci_parity == 0)
+ ahc->flags |= AHC_DISABLE_PCI_PERR;
+
+ return (0);
+}
+
+void
+ahc_platform_free(struct ahc_softc *ahc)
+{
+ struct ahc_linux_target *targ;
+ struct ahc_linux_device *dev;
+ int i, j;
+
+ if (ahc->platform_data != NULL) {
+ del_timer_sync(&ahc->platform_data->completeq_timer);
+ ahc_linux_kill_dv_thread(ahc);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ tasklet_kill(&ahc->platform_data->runq_tasklet);
+#endif
+ if (ahc->platform_data->host != NULL) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ scsi_remove_host(ahc->platform_data->host);
+#endif
+ scsi_unregister(ahc->platform_data->host);
+ }
+
+ /* destroy all of the device and target objects */
+ for (i = 0; i < AHC_NUM_TARGETS; i++) {
+ targ = ahc->platform_data->targets[i];
+ if (targ != NULL) {
+ /* Keep target around through the loop. */
+ targ->refcount++;
+ for (j = 0; j < AHC_NUM_LUNS; j++) {
+
+ if (targ->devices[j] == NULL)
+ continue;
+ dev = targ->devices[j];
+ ahc_linux_free_device(ahc, dev);
+ }
+ /*
+ * Forcibly free the target now that
+ * all devices are gone.
+ */
+ ahc_linux_free_target(ahc, targ);
+ }
+ }
+
+ if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
+ free_irq(ahc->platform_data->irq, ahc);
+ if (ahc->tag == BUS_SPACE_PIO
+ && ahc->bsh.ioport != 0)
+ release_region(ahc->bsh.ioport, 256);
+ if (ahc->tag == BUS_SPACE_MEMIO
+ && ahc->bsh.maddr != NULL) {
+ u_long base_addr;
+
+ base_addr = (u_long)ahc->bsh.maddr;
+ base_addr &= PAGE_MASK;
+ iounmap((void *)base_addr);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+ release_mem_region(ahc->platform_data->mem_busaddr,
+ 0x1000);
+#endif
+ }
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0) && \
+ LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ /*
+ * In 2.4 we detach from the scsi midlayer before the PCI
+ * layer invokes our remove callback. No per-instance
+ * detach is provided, so we must reach inside the PCI
+ * subsystem's internals and detach our driver manually.
+ */
+ if (ahc->dev_softc != NULL)
+ ahc->dev_softc->driver = NULL;
+#endif
+ free(ahc->platform_data, M_DEVBUF);
+ }
+}
+
+void
+ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
+{
+ ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
+ SCB_GET_CHANNEL(ahc, scb),
+ SCB_GET_LUN(scb), SCB_LIST_NULL,
+ ROLE_UNKNOWN, CAM_REQUEUE_REQ);
+}
+
+void
+ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
+ ahc_queue_alg alg)
+{
+ struct ahc_linux_device *dev;
+ int was_queuing;
+ int now_queuing;
+
+ dev = ahc_linux_get_device(ahc, devinfo->channel - 'A',
+ devinfo->target,
+ devinfo->lun, /*alloc*/FALSE);
+ if (dev == NULL)
+ return;
+ was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
+ switch (alg) {
+ default:
+ case AHC_QUEUE_NONE:
+ now_queuing = 0;
+ break;
+ case AHC_QUEUE_BASIC:
+ now_queuing = AHC_DEV_Q_BASIC;
+ break;
+ case AHC_QUEUE_TAGGED:
+ now_queuing = AHC_DEV_Q_TAGGED;
+ break;
+ }
+ if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
+ && (was_queuing != now_queuing)
+ && (dev->active != 0)) {
+ dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
+ dev->qfrozen++;
+ }
+
+ dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
+ if (now_queuing) {
+ u_int usertags;
+
+ usertags = ahc_linux_user_tagdepth(ahc, devinfo);
+ if (!was_queuing) {
+ /*
+ * Start out agressively and allow our
+ * dynamic queue depth algorithm to take
+ * care of the rest.
+ */
+ dev->maxtags = usertags;
+ dev->openings = dev->maxtags - dev->active;
+ }
+ if (dev->maxtags == 0) {
+ /*
+ * Queueing is disabled by the user.
+ */
+ dev->openings = 1;
+ } else if (alg == AHC_QUEUE_TAGGED) {
+ dev->flags |= AHC_DEV_Q_TAGGED;
+ if (aic7xxx_periodic_otag != 0)
+ dev->flags |= AHC_DEV_PERIODIC_OTAG;
+ } else
+ dev->flags |= AHC_DEV_Q_BASIC;
+ } else {
+ /* We can only have one opening. */
+ dev->maxtags = 0;
+ dev->openings = 1 - dev->active;
+ }
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ if (dev->scsi_device != NULL) {
+ switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
+ case AHC_DEV_Q_BASIC:
+ scsi_adjust_queue_depth(dev->scsi_device,
+ MSG_SIMPLE_TASK,
+ dev->openings + dev->active);
+ break;
+ case AHC_DEV_Q_TAGGED:
+ scsi_adjust_queue_depth(dev->scsi_device,
+ MSG_ORDERED_TASK,
+ dev->openings + dev->active);
+ break;
+ default:
+ /*
+ * We allow the OS to queue 2 untagged transactions to
+ * us at any time even though we can only execute them
+ * serially on the controller/device. This should
+ * remove some latency.
+ */
+ scsi_adjust_queue_depth(dev->scsi_device,
+ /*NON-TAGGED*/0,
+ /*queue depth*/2);
+ break;
+ }
+ }
+#endif
+}
+
+int
+ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
+ int lun, u_int tag, role_t role, uint32_t status)
+{
+ int chan;
+ int maxchan;
+ int targ;
+ int maxtarg;
+ int clun;
+ int maxlun;
+ int count;
+
+ if (tag != SCB_LIST_NULL)
+ return (0);
+
+ chan = 0;
+ if (channel != ALL_CHANNELS) {
+ chan = channel - 'A';
+ maxchan = chan + 1;
+ } else {
+ maxchan = (ahc->features & AHC_TWIN) ? 2 : 1;
+ }
+ targ = 0;
+ if (target != CAM_TARGET_WILDCARD) {
+ targ = target;
+ maxtarg = targ + 1;
+ } else {
+ maxtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
+ }
+ clun = 0;
+ if (lun != CAM_LUN_WILDCARD) {
+ clun = lun;
+ maxlun = clun + 1;
+ } else {
+ maxlun = AHC_NUM_LUNS;
+ }
+
+ count = 0;
+ for (; chan < maxchan; chan++) {
+
+ for (; targ < maxtarg; targ++) {
+
+ for (; clun < maxlun; clun++) {
+ struct ahc_linux_device *dev;
+ struct ahc_busyq *busyq;
+ struct ahc_cmd *acmd;
+
+ dev = ahc_linux_get_device(ahc, chan,
+ targ, clun,
+ /*alloc*/FALSE);
+ if (dev == NULL)
+ continue;
+
+ busyq = &dev->busyq;
+ while ((acmd = TAILQ_FIRST(busyq)) != NULL) {
+ Scsi_Cmnd *cmd;
+
+ cmd = &acmd_scsi_cmd(acmd);
+ TAILQ_REMOVE(busyq, acmd,
+ acmd_links.tqe);
+ count++;
+ cmd->result = status << 16;
+ ahc_linux_queue_cmd_complete(ahc, cmd);
+ }
+ }
+ }
+ }
+
+ return (count);
+}
+
+static void
+ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc)
+{
+ u_long flags;
+
+ ahc_lock(ahc, &flags);
+ del_timer(&ahc->platform_data->completeq_timer);
+ ahc->platform_data->flags &= ~AHC_RUN_CMPLT_Q_TIMER;
+ ahc_linux_run_complete_queue(ahc);
+ ahc_unlock(ahc, &flags);
+}
+
+static void
+ahc_linux_start_dv(struct ahc_softc *ahc)
+{
+
+ /*
+ * Freeze the simq and signal ahc_linux_queue to not let any
+ * more commands through.
+ */
+ if ((ahc->platform_data->flags & AHC_DV_ACTIVE) == 0) {
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV)
+ printf("%s: Waking DV thread\n", ahc_name(ahc));
+#endif
+
+ ahc->platform_data->flags |= AHC_DV_ACTIVE;
+ ahc_linux_freeze_simq(ahc);
+
+ /* Wake up the DV kthread */
+ up(&ahc->platform_data->dv_sem);
+ }
+}
+
+static void
+ahc_linux_kill_dv_thread(struct ahc_softc *ahc)
+{
+ u_long s;
+
+ ahc_lock(ahc, &s);
+ if (ahc->platform_data->dv_pid != 0) {
+ ahc->platform_data->flags |= AHC_DV_SHUTDOWN;
+ ahc_unlock(ahc, &s);
+ up(&ahc->platform_data->dv_sem);
+
+ /*
+ * Use the eh_sem as an indicator that the
+ * dv thread is exiting. Note that the dv
+ * thread must still return after performing
+ * the up on our semaphore before it has
+ * completely exited this module. Unfortunately,
+ * there seems to be no easy way to wait for the
+ * exit of a thread for which you are not the
+ * parent (dv threads are parented by init).
+ * Cross your fingers...
+ */
+ down(&ahc->platform_data->eh_sem);
+
+ /*
+ * Mark the dv thread as already dead. This
+ * avoids attempting to kill it a second time.
+ * This is necessary because we must kill the
+ * DV thread before calling ahc_free() in the
+ * module shutdown case to avoid bogus locking
+ * in the SCSI mid-layer, but we ahc_free() is
+ * called without killing the DV thread in the
+ * instance detach case, so ahc_platform_free()
+ * calls us again to verify that the DV thread
+ * is dead.
+ */
+ ahc->platform_data->dv_pid = 0;
+ } else {
+ ahc_unlock(ahc, &s);
+ }
+}
+
+static int
+ahc_linux_dv_thread(void *data)
+{
+ struct ahc_softc *ahc;
+ int target;
+ u_long s;
+
+ ahc = (struct ahc_softc *)data;
+
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV)
+ printf("Launching DV Thread\n");
+#endif
+
+ /*
+ * Complete thread creation.
+ */
+ lock_kernel();
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ /*
+ * Don't care about any signals.
+ */
+ siginitsetinv(¤t->blocked, 0);
+
+ daemonize();
+ sprintf(current->comm, "ahc_dv_%d", ahc->unit);
+#else
+ daemonize("ahc_dv_%d", ahc->unit);
+#endif
+ unlock_kernel();
+
+ while (1) {
+ /*
+ * Use down_interruptible() rather than down() to
+ * avoid inclusion in the load average.
+ */
+ down_interruptible(&ahc->platform_data->dv_sem);
+
+ /* Check to see if we've been signaled to exit */
+ ahc_lock(ahc, &s);
+ if ((ahc->platform_data->flags & AHC_DV_SHUTDOWN) != 0) {
+ ahc_unlock(ahc, &s);
+ break;
+ }
+ ahc_unlock(ahc, &s);
+
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV)
+ printf("%s: Beginning Domain Validation\n",
+ ahc_name(ahc));
+#endif
+
+ /*
+ * Wait for any pending commands to drain before proceeding.
+ */
+ ahc_lock(ahc, &s);
+ while (LIST_FIRST(&ahc->pending_scbs) != NULL) {
+ ahc->platform_data->flags |= AHC_DV_WAIT_SIMQ_EMPTY;
+ ahc_unlock(ahc, &s);
+ down_interruptible(&ahc->platform_data->dv_sem);
+ ahc_lock(ahc, &s);
+ }
+
+ /*
+ * Wait for the SIMQ to be released so that DV is the
+ * only reason the queue is frozen.
+ */
+ while (AHC_DV_SIMQ_FROZEN(ahc) == 0) {
+ ahc->platform_data->flags |= AHC_DV_WAIT_SIMQ_RELEASE;
+ ahc_unlock(ahc, &s);
+ down_interruptible(&ahc->platform_data->dv_sem);
+ ahc_lock(ahc, &s);
+ }
+ ahc_unlock(ahc, &s);
+
+ for (target = 0; target < AHC_NUM_TARGETS; target++)
+ ahc_linux_dv_target(ahc, target);
+
+ ahc_lock(ahc, &s);
+ ahc->platform_data->flags &= ~AHC_DV_ACTIVE;
+ ahc_unlock(ahc, &s);
+
+ /*
+ * Release the SIMQ so that normal commands are
+ * allowed to continue on the bus.
+ */
+ ahc_linux_release_simq((u_long)ahc);
+ }
+ up(&ahc->platform_data->eh_sem);
+ return (0);
+}
+
+#define AHC_LINUX_DV_INQ_SHORT_LEN 36
+#define AHC_LINUX_DV_INQ_LEN 256
+#define AHC_LINUX_DV_TIMEOUT (HZ / 4)
+
+#define AHC_SET_DV_STATE(ahc, targ, newstate) \
+ ahc_set_dv_state(ahc, targ, newstate, __LINE__)
+
+static __inline void
+ahc_set_dv_state(struct ahc_softc *ahc, struct ahc_linux_target *targ,
+ ahc_dv_state newstate, u_int line)
+{
+ ahc_dv_state oldstate;
+
+ oldstate = targ->dv_state;
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV)
+ printf("%s:%d: Going from state %d to state %d\n",
+ ahc_name(ahc), line, oldstate, newstate);
+#endif
+
+ if (oldstate == newstate)
+ targ->dv_state_retry++;
+ else
+ targ->dv_state_retry = 0;
+ targ->dv_state = newstate;
+}
+
+static void
+ahc_linux_dv_target(struct ahc_softc *ahc, u_int target_offset)
+{
+ struct ahc_devinfo devinfo;
+ struct ahc_linux_target *targ;
+ struct scsi_cmnd *cmd;
+ struct scsi_device *scsi_dev;
+ struct scsi_sense_data *sense;
+ uint8_t *buffer;
+ u_long s;
+ u_int timeout;
+ int echo_size;
+
+ sense = NULL;
+ buffer = NULL;
+ echo_size = 0;
+ ahc_lock(ahc, &s);
+ targ = ahc->platform_data->targets[target_offset];
+ if (targ == NULL || (targ->flags & AHC_DV_REQUIRED) == 0) {
+ ahc_unlock(ahc, &s);
+ return;
+ }
+ ahc_compile_devinfo(&devinfo,
+ targ->channel == 0 ? ahc->our_id : ahc->our_id_b,
+ targ->target, /*lun*/0, targ->channel + 'A',
+ ROLE_INITIATOR);
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, &devinfo);
+ printf("Performing DV\n");
+ }
+#endif
+
+ ahc_unlock(ahc, &s);
+
+ cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
+ scsi_dev = malloc(sizeof(struct scsi_device), M_DEVBUF, M_WAITOK);
+ scsi_dev->host = ahc->platform_data->host;
+ scsi_dev->id = devinfo.target;
+ scsi_dev->lun = devinfo.lun;
+ scsi_dev->channel = devinfo.channel - 'A';
+ ahc->platform_data->dv_scsi_dev = scsi_dev;
+
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_INQ_SHORT_ASYNC);
+
+ while (targ->dv_state != AHC_DV_STATE_EXIT) {
+ timeout = AHC_LINUX_DV_TIMEOUT;
+ switch (targ->dv_state) {
+ case AHC_DV_STATE_INQ_SHORT_ASYNC:
+ case AHC_DV_STATE_INQ_ASYNC:
+ case AHC_DV_STATE_INQ_ASYNC_VERIFY:
+ /*
+ * Set things to async narrow to reduce the
+ * chance that the INQ will fail.
+ */
+ ahc_lock(ahc, &s);
+ ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
+ AHC_TRANS_GOAL, /*paused*/FALSE);
+ ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
+ AHC_TRANS_GOAL, /*paused*/FALSE);
+ ahc_unlock(ahc, &s);
+ timeout = 10 * HZ;
+ targ->flags &= ~AHC_INQ_VALID;
+ /* FALLTHROUGH */
+ case AHC_DV_STATE_INQ_VERIFY:
+ {
+ u_int inq_len;
+
+ if (targ->dv_state == AHC_DV_STATE_INQ_SHORT_ASYNC)
+ inq_len = AHC_LINUX_DV_INQ_SHORT_LEN;
+ else
+ inq_len = targ->inq_data->additional_length + 5;
+ ahc_linux_dv_inq(ahc, cmd, &devinfo, targ, inq_len);
+ break;
+ }
+ case AHC_DV_STATE_TUR:
+ case AHC_DV_STATE_BUSY:
+ timeout = 5 * HZ;
+ ahc_linux_dv_tur(ahc, cmd, &devinfo);
+ break;
+ case AHC_DV_STATE_REBD:
+ ahc_linux_dv_rebd(ahc, cmd, &devinfo, targ);
+ break;
+ case AHC_DV_STATE_WEB:
+ ahc_linux_dv_web(ahc, cmd, &devinfo, targ);
+ break;
+
+ case AHC_DV_STATE_REB:
+ ahc_linux_dv_reb(ahc, cmd, &devinfo, targ);
+ break;
+
+ case AHC_DV_STATE_SU:
+ ahc_linux_dv_su(ahc, cmd, &devinfo, targ);
+ timeout = 50 * HZ;
+ break;
+
+ default:
+ ahc_print_devinfo(ahc, &devinfo);
+ printf("Unknown DV state %d\n", targ->dv_state);
+ goto out;
+ }
+
+ /* Queue the command and wait for it to complete */
+ /* Abuse eh_timeout in the scsi_cmnd struct for our purposes */
+ init_timer(&cmd->eh_timeout);
+#ifdef AHC_DEBUG
+ if ((ahc_debug & AHC_SHOW_MESSAGES) != 0)
+ /*
+ * All of the printfs during negotiation
+ * really slow down the negotiation.
+ * Add a bit of time just to be safe.
+ */
+ timeout += HZ;
+#endif
+ scsi_add_timer(cmd, timeout, ahc_linux_dv_timeout);
+ /*
+ * In 2.5.X, it is assumed that all calls from the
+ * "midlayer" (which we are emulating) will have the
+ * ahc host lock held. For other kernels, the
+ * io_request_lock must be held.
+ */
+#if AHC_SCSI_HAS_HOST_LOCK != 0
+ ahc_lock(ahc, &s);
+#else
+ spin_lock_irqsave(&io_request_lock, s);
+#endif
+ ahc_linux_queue(cmd, ahc_linux_dv_complete);
+#if AHC_SCSI_HAS_HOST_LOCK != 0
+ ahc_unlock(ahc, &s);
+#else
+ spin_unlock_irqrestore(&io_request_lock, s);
+#endif
+ down_interruptible(&ahc->platform_data->dv_cmd_sem);
+ /*
+ * Wait for the SIMQ to be released so that DV is the
+ * only reason the queue is frozen.
+ */
+ ahc_lock(ahc, &s);
+ while (AHC_DV_SIMQ_FROZEN(ahc) == 0) {
+ ahc->platform_data->flags |= AHC_DV_WAIT_SIMQ_RELEASE;
+ ahc_unlock(ahc, &s);
+ down_interruptible(&ahc->platform_data->dv_sem);
+ ahc_lock(ahc, &s);
+ }
+ ahc_unlock(ahc, &s);
+
+ ahc_linux_dv_transition(ahc, cmd, &devinfo, targ);
+ }
+
+out:
+ if ((targ->flags & AHC_INQ_VALID) != 0
+ && ahc_linux_get_device(ahc, devinfo.channel - 'A',
+ devinfo.target, devinfo.lun,
+ /*alloc*/FALSE) == NULL) {
+ /*
+ * The DV state machine failed to configure this device.
+ * This is normal if DV is disabled. Since we have inquiry
+ * data, filter it and use the "optimistic" negotiation
+ * parameters found in the inquiry string.
+ */
+ ahc_linux_filter_inquiry(ahc, &devinfo);
+ if ((targ->flags & (AHC_BASIC_DV|AHC_ENHANCED_DV)) != 0) {
+ ahc_print_devinfo(ahc, &devinfo);
+ printf("DV failed to configure device. "
+ "Please file a bug report against "
+ "this driver.\n");
+ }
+ }
+
+ if (cmd != NULL)
+ free(cmd, M_DEVBUF);
+
+ if (ahc->platform_data->dv_scsi_dev != NULL) {
+ free(ahc->platform_data->dv_scsi_dev, M_DEVBUF);
+ ahc->platform_data->dv_scsi_dev = NULL;
+ }
+
+ ahc_lock(ahc, &s);
+ if (targ->dv_buffer != NULL) {
+ free(targ->dv_buffer, M_DEVBUF);
+ targ->dv_buffer = NULL;
+ }
+ if (targ->dv_buffer1 != NULL) {
+ free(targ->dv_buffer1, M_DEVBUF);
+ targ->dv_buffer1 = NULL;
+ }
+ targ->flags &= ~AHC_DV_REQUIRED;
+ if (targ->refcount == 0)
+ ahc_linux_free_target(ahc, targ);
+ ahc_unlock(ahc, &s);
+}
+
+static void
+ahc_linux_dv_transition(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo,
+ struct ahc_linux_target *targ)
+{
+ u_int32_t status;
+
+ status = aic_error_action(cmd, targ->inq_data,
+ ahc_cmd_get_transaction_status(cmd),
+ ahc_cmd_get_scsi_status(cmd));
+
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Entering ahc_linux_dv_transition, state= %d, "
+ "status= 0x%x, cmd->result= 0x%x\n", targ->dv_state,
+ status, cmd->result);
+ }
+#endif
+
+ switch (targ->dv_state) {
+ case AHC_DV_STATE_INQ_SHORT_ASYNC:
+ case AHC_DV_STATE_INQ_ASYNC:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ {
+ AHC_SET_DV_STATE(ahc, targ, targ->dv_state+1);
+ break;
+ }
+ case SS_INQ_REFRESH:
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_TUR:
+ case SS_RETRY:
+ AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
+ if (ahc_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ)
+ targ->dv_state_retry--;
+ if ((status & SS_ERRMASK) == EBUSY)
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_BUSY);
+ if (targ->dv_state_retry < 10)
+ break;
+ /* FALLTHROUGH */
+ default:
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Failed DV inquiry, skipping\n");
+ }
+#endif
+ break;
+ }
+ break;
+ case AHC_DV_STATE_INQ_ASYNC_VERIFY:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ {
+ u_int xportflags;
+ u_int spi3data;
+
+ if (memcmp(targ->inq_data, targ->dv_buffer,
+ AHC_LINUX_DV_INQ_LEN) != 0) {
+ /*
+ * Inquiry data must have changed.
+ * Try from the top again.
+ */
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ }
+
+ AHC_SET_DV_STATE(ahc, targ, targ->dv_state+1);
+ targ->flags |= AHC_INQ_VALID;
+ if (ahc_linux_user_dv_setting(ahc) == 0)
+ break;
+
+ xportflags = targ->inq_data->flags;
+ if ((xportflags & (SID_Sync|SID_WBus16)) == 0)
+ break;
+
+ spi3data = targ->inq_data->spi3data;
+ switch (spi3data & SID_SPI_CLOCK_DT_ST) {
+ default:
+ case SID_SPI_CLOCK_ST:
+ /* Assume only basic DV is supported. */
+ targ->flags |= AHC_BASIC_DV;
+ break;
+ case SID_SPI_CLOCK_DT:
+ case SID_SPI_CLOCK_DT_ST:
+ targ->flags |= AHC_ENHANCED_DV;
+ break;
+ }
+ break;
+ }
+ case SS_INQ_REFRESH:
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_TUR:
+ case SS_RETRY:
+ AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
+ if (ahc_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ)
+ targ->dv_state_retry--;
+
+ if ((status & SS_ERRMASK) == EBUSY)
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_BUSY);
+ if (targ->dv_state_retry < 10)
+ break;
+ /* FALLTHROUGH */
+ default:
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Failed DV inquiry, skipping\n");
+ }
+#endif
+ break;
+ }
+ break;
+ case AHC_DV_STATE_INQ_VERIFY:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ {
+
+ if (memcmp(targ->inq_data, targ->dv_buffer,
+ AHC_LINUX_DV_INQ_LEN) == 0) {
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ break;
+ }
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ int i;
+
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Inquiry buffer mismatch:");
+ for (i = 0; i < AHC_LINUX_DV_INQ_LEN; i++) {
+ if ((i & 0xF) == 0)
+ printf("\n ");
+ printf("0x%x:0x0%x ",
+ ((uint8_t *)targ->inq_data)[i],
+ targ->dv_buffer[i]);
+ }
+ printf("\n");
+ }
+#endif
+
+ if (ahc_linux_fallback(ahc, devinfo) != 0) {
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ break;
+ }
+ /*
+ * Do not count "falling back"
+ * against our retries.
+ */
+ targ->dv_state_retry = 0;
+ AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
+ break;
+ }
+ case SS_INQ_REFRESH:
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_TUR:
+ case SS_RETRY:
+ AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
+ if (ahc_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ) {
+ targ->dv_state_retry--;
+ } else if ((status & SSQ_FALLBACK) != 0) {
+ if (ahc_linux_fallback(ahc, devinfo) != 0) {
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_EXIT);
+ break;
+ }
+ /*
+ * Do not count "falling back"
+ * against our retries.
+ */
+ targ->dv_state_retry = 0;
+ } else if ((status & SS_ERRMASK) == EBUSY)
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_BUSY);
+ if (targ->dv_state_retry < 10)
+ break;
+ /* FALLTHROUGH */
+ default:
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Failed DV inquiry, skipping\n");
+ }
+#endif
+ break;
+ }
+ break;
+
+ case AHC_DV_STATE_TUR:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ if ((targ->flags & AHC_BASIC_DV) != 0) {
+ ahc_linux_filter_inquiry(ahc, devinfo);
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_INQ_VERIFY);
+ } else if ((targ->flags & AHC_ENHANCED_DV) != 0) {
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_REBD);
+ } else {
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ }
+ break;
+ case SS_RETRY:
+ case SS_TUR:
+ if ((status & SS_ERRMASK) == EBUSY) {
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_BUSY);
+ break;
+ }
+ AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
+ if (ahc_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ) {
+ targ->dv_state_retry--;
+ } else if ((status & SSQ_FALLBACK) != 0) {
+ if (ahc_linux_fallback(ahc, devinfo) != 0) {
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_EXIT);
+ break;
+ }
+ /*
+ * Do not count "falling back"
+ * against our retries.
+ */
+ targ->dv_state_retry = 0;
+ }
+ if (targ->dv_state_retry >= 10) {
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("DV TUR reties exhausted\n");
+ }
+#endif
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ break;
+ }
+ if (status & SSQ_DELAY)
+ scsi_sleep(1 * HZ);
+
+ break;
+ case SS_START:
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_SU);
+ break;
+ case SS_INQ_REFRESH:
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ default:
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ break;
+ }
+ break;
+
+ case AHC_DV_STATE_REBD:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ {
+ uint32_t echo_size;
+
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_WEB);
+ echo_size = scsi_3btoul(&targ->dv_buffer[1]);
+ echo_size &= 0x1FFF;
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Echo buffer size= %d\n", echo_size);
+ }
+#endif
+ if (echo_size == 0) {
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ break;
+ }
+
+ /* Generate the buffer pattern */
+ targ->dv_echo_size = echo_size;
+ ahc_linux_generate_dv_pattern(targ);
+ /*
+ * Setup initial negotiation values.
+ */
+ ahc_linux_filter_inquiry(ahc, devinfo);
+ break;
+ }
+ case SS_INQ_REFRESH:
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_RETRY:
+ AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
+ if (ahc_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ)
+ targ->dv_state_retry--;
+ if (targ->dv_state_retry <= 10)
+ break;
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("DV REBD reties exhausted\n");
+ }
+#endif
+ /* FALLTHROUGH */
+ case SS_FATAL:
+ default:
+ /*
+ * Setup initial negotiation values
+ * and try level 1 DV.
+ */
+ ahc_linux_filter_inquiry(ahc, devinfo);
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_INQ_VERIFY);
+ targ->dv_echo_size = 0;
+ break;
+ }
+ break;
+
+ case AHC_DV_STATE_WEB:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_REB);
+ break;
+ case SS_INQ_REFRESH:
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_RETRY:
+ AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
+ if (ahc_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ) {
+ targ->dv_state_retry--;
+ } else if ((status & SSQ_FALLBACK) != 0) {
+ if (ahc_linux_fallback(ahc, devinfo) != 0) {
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_EXIT);
+ break;
+ }
+ /*
+ * Do not count "falling back"
+ * against our retries.
+ */
+ targ->dv_state_retry = 0;
+ }
+ if (targ->dv_state_retry <= 10)
+ break;
+ /* FALLTHROUGH */
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("DV WEB reties exhausted\n");
+ }
+#endif
+ default:
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ break;
+ }
+ break;
+
+ case AHC_DV_STATE_REB:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ if (memcmp(targ->dv_buffer, targ->dv_buffer1,
+ targ->dv_echo_size) != 0) {
+ if (ahc_linux_fallback(ahc, devinfo) != 0)
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_EXIT);
+ else
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_WEB);
+ break;
+ }
+
+ if (targ->dv_buffer != NULL) {
+ free(targ->dv_buffer, M_DEVBUF);
+ targ->dv_buffer = NULL;
+ }
+ if (targ->dv_buffer1 != NULL) {
+ free(targ->dv_buffer1, M_DEVBUF);
+ targ->dv_buffer1 = NULL;
+ }
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ break;
+ case SS_INQ_REFRESH:
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_RETRY:
+ AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
+ if (ahc_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ) {
+ targ->dv_state_retry--;
+ } else if ((status & SSQ_FALLBACK) != 0) {
+ if (ahc_linux_fallback(ahc, devinfo) != 0) {
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_EXIT);
+ break;
+ }
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_WEB);
+ }
+ if (targ->dv_state_retry <= 10) {
+ if ((status & (SSQ_DELAY_RANDOM|SSQ_DELAY))!= 0)
+ scsi_sleep(ahc->our_id*HZ/10);
+ break;
+ }
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("DV REB reties exhausted\n");
+ }
+#endif
+ /* FALLTHROUGH */
+ default:
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ break;
+ }
+ break;
+
+ case AHC_DV_STATE_SU:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ case SS_INQ_REFRESH:
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ default:
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ break;
+ }
+ break;
+
+ case AHC_DV_STATE_BUSY:
+ switch (status & SS_MASK) {
+ case SS_NOP:
+ case SS_INQ_REFRESH:
+ AHC_SET_DV_STATE(ahc, targ,
+ AHC_DV_STATE_INQ_SHORT_ASYNC);
+ break;
+ case SS_TUR:
+ case SS_RETRY:
+ AHC_SET_DV_STATE(ahc, targ, targ->dv_state);
+ if (ahc_cmd_get_transaction_status(cmd)
+ == CAM_REQUEUE_REQ) {
+ targ->dv_state_retry--;
+ } else if (targ->dv_state_retry < 60) {
+ if ((status & SSQ_DELAY) != 0)
+ scsi_sleep(1 * HZ);
+ } else {
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("DV BUSY reties exhausted\n");
+ }
+#endif
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ }
+ break;
+ default:
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ break;
}
+ break;
+
+ default:
+ printf("%s: Invalid DV completion state %d\n", ahc_name(ahc),
+ targ->dv_state);
+ AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT);
+ break;
}
- return (unit);
+}
+
+static void
+ahc_linux_dv_fill_cmd(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo)
+{
+ memset(cmd, 0, sizeof(struct scsi_cmnd));
+ cmd->device = ahc->platform_data->dv_scsi_dev;
+ cmd->scsi_done = ahc_linux_dv_complete;
}
/*
- * Place the SCSI bus into a known state by either resetting it,
- * or forcing transfer negotiations on the next command to any
- * target.
+ * Synthesize an inquiry command. On the return trip, it'll be
+ * sniffed and the device transfer settings set for us.
*/
-void
-ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
+static void
+ahc_linux_dv_inq(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo, struct ahc_linux_target *targ,
+ u_int request_length)
{
- int i;
- int numtarg;
-
- i = 0;
- numtarg = 0;
-
- if (aic7xxx_no_reset != 0)
- ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
- if ((ahc->flags & AHC_RESET_BUS_A) != 0)
- ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Sending INQ\n");
+ }
+#endif
+ if (targ->inq_data == NULL)
+ targ->inq_data = malloc(AHC_LINUX_DV_INQ_LEN,
+ M_DEVBUF, M_WAITOK);
+ if (targ->dv_state > AHC_DV_STATE_INQ_ASYNC) {
+ if (targ->dv_buffer != NULL)
+ free(targ->dv_buffer, M_DEVBUF);
+ targ->dv_buffer = malloc(AHC_LINUX_DV_INQ_LEN,
+ M_DEVBUF, M_WAITOK);
+ }
+
+ ahc_linux_dv_fill_cmd(ahc, cmd, devinfo);
+ cmd->sc_data_direction = SCSI_DATA_READ;
+ cmd->cmd_len = 6;
+ cmd->cmnd[0] = INQUIRY;
+ cmd->cmnd[4] = request_length;
+ cmd->request_bufflen = request_length;
+ if (targ->dv_state > AHC_DV_STATE_INQ_ASYNC)
+ cmd->request_buffer = targ->dv_buffer;
else
- numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
+ cmd->request_buffer = targ->inq_data;
+ memset(cmd->request_buffer, 0, AHC_LINUX_DV_INQ_LEN);
+}
- if ((ahc->features & AHC_TWIN) != 0) {
+static void
+ahc_linux_dv_tur(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo)
+{
- if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
- ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
- } else {
- if (numtarg == 0)
- i = 8;
- numtarg += 8;
- }
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Sending TUR\n");
}
+#endif
+ /* Do a TUR to clear out any non-fatal transitional state */
+ ahc_linux_dv_fill_cmd(ahc, cmd, devinfo);
+ cmd->sc_data_direction = SCSI_DATA_NONE;
+ cmd->cmd_len = 6;
+ cmd->cmnd[0] = TEST_UNIT_READY;
+}
- for (; i < numtarg; i++) {
- struct ahc_devinfo devinfo;
- struct ahc_initiator_tinfo *tinfo;
- struct ahc_tmode_tstate *tstate;
- u_int our_id;
- u_int target_id;
- char channel;
+#define AHC_REBD_LEN 4
- channel = 'A';
- our_id = ahc->our_id;
- target_id = i;
- if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
- channel = 'B';
- our_id = ahc->our_id_b;
- target_id = i % 8;
- }
- tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
- target_id, &tstate);
- tinfo->goal = tinfo->user;
- /*
- * Don't try negotiations that require PPR messages
- * until we successfully retrieve Inquiry data.
- */
- tinfo->goal.ppr_options = 0;
- if (tinfo->goal.transport_version > SCSI_REV_2)
- tinfo->goal.transport_version = SCSI_REV_2;
- ahc_compile_devinfo(&devinfo, our_id, target_id,
- CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
- ahc_update_neg_request(ahc, &devinfo, tstate,
- tinfo, /*force*/FALSE);
- }
- /* Give the bus some time to recover */
- if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
- ahc_linux_freeze_sim_queue(ahc);
- init_timer(&ahc->platform_data->reset_timer);
- ahc->platform_data->reset_timer.data = (u_long)ahc;
- ahc->platform_data->reset_timer.expires =
- jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
- ahc->platform_data->reset_timer.function =
- ahc_linux_release_sim_queue;
- add_timer(&ahc->platform_data->reset_timer);
+static void
+ahc_linux_dv_rebd(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo, struct ahc_linux_target *targ)
+{
+
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Sending REBD\n");
}
+#endif
+ if (targ->dv_buffer != NULL)
+ free(targ->dv_buffer, M_DEVBUF);
+ targ->dv_buffer = malloc(AHC_REBD_LEN, M_DEVBUF, M_WAITOK);
+ ahc_linux_dv_fill_cmd(ahc, cmd, devinfo);
+ cmd->sc_data_direction = SCSI_DATA_READ;
+ cmd->cmd_len = 10;
+ cmd->cmnd[0] = READ_BUFFER;
+ cmd->cmnd[1] = 0x0b;
+ scsi_ulto3b(AHC_REBD_LEN, &cmd->cmnd[6]);
+ cmd->request_bufflen = AHC_REBD_LEN;
+ cmd->underflow = cmd->request_bufflen;
+ cmd->request_buffer = targ->dv_buffer;
}
-int
-ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
+static void
+ahc_linux_dv_web(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo, struct ahc_linux_target *targ)
{
- ahc->platform_data =
- malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
- if (ahc->platform_data == NULL)
- return (ENOMEM);
- memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
- TAILQ_INIT(&ahc->platform_data->completeq);
- TAILQ_INIT(&ahc->platform_data->device_runq);
- ahc->platform_data->irq = AHC_LINUX_NOIRQ;
- ahc->platform_data->hw_dma_mask = 0xFFFFFFFF;
- ahc_lockinit(ahc);
- ahc_done_lockinit(ahc);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
- init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
-#else
- ahc->platform_data->eh_sem = MUTEX_LOCKED;
-#endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- tasklet_init(&ahc->platform_data->runq_tasklet, ahc_runq_tasklet,
- (unsigned long)ahc);
+
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Sending WEB\n");
+ }
#endif
- ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
- ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
- if (TAILQ_EMPTY(&ahc_tailq))
- register_reboot_notifier(&ahc_linux_notifier);
- return (0);
+ ahc_linux_dv_fill_cmd(ahc, cmd, devinfo);
+ cmd->sc_data_direction = SCSI_DATA_WRITE;
+ cmd->cmd_len = 10;
+ cmd->cmnd[0] = WRITE_BUFFER;
+ cmd->cmnd[1] = 0x0a;
+ scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
+ cmd->request_bufflen = targ->dv_echo_size;
+ cmd->underflow = cmd->request_bufflen;
+ cmd->request_buffer = targ->dv_buffer;
}
-void
-ahc_platform_free(struct ahc_softc *ahc)
+static void
+ahc_linux_dv_reb(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo, struct ahc_linux_target *targ)
{
- if (ahc->platform_data != NULL) {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- tasklet_kill(&ahc->platform_data->runq_tasklet);
-#endif
- if (ahc->platform_data->host != NULL)
- scsi_unregister(ahc->platform_data->host);
- if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
- free_irq(ahc->platform_data->irq, ahc);
- if (ahc->tag == BUS_SPACE_PIO
- && ahc->bsh.ioport != 0)
- release_region(ahc->bsh.ioport, 256);
- if (ahc->tag == BUS_SPACE_MEMIO
- && ahc->bsh.maddr != NULL) {
- u_long base_addr;
- base_addr = (u_long)ahc->bsh.maddr;
- base_addr &= PAGE_MASK;
- iounmap((void *)base_addr);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- release_mem_region(ahc->platform_data->mem_busaddr,
- 0x1000);
-#endif
- }
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- /* XXX Need an instance detach in the PCI code */
- if (ahc->dev_softc != NULL)
- ahc->dev_softc->driver = NULL;
-#endif
- free(ahc->platform_data, M_DEVBUF);
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Sending REB\n");
}
- if (TAILQ_EMPTY(&ahc_tailq)) {
- unregister_reboot_notifier(&ahc_linux_notifier);
-#ifdef CONFIG_PCI
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- pci_unregister_driver(&aic7xxx_pci_driver);
-#endif
#endif
- }
+ ahc_linux_dv_fill_cmd(ahc, cmd, devinfo);
+ cmd->sc_data_direction = SCSI_DATA_READ;
+ cmd->cmd_len = 10;
+ cmd->cmnd[0] = READ_BUFFER;
+ cmd->cmnd[1] = 0x0a;
+ scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
+ cmd->request_bufflen = targ->dv_echo_size;
+ cmd->underflow = cmd->request_bufflen;
+ cmd->request_buffer = targ->dv_buffer1;
}
-void
-ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
-{
- ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
- SCB_GET_CHANNEL(ahc, scb),
- SCB_GET_LUN(scb), SCB_LIST_NULL,
- ROLE_UNKNOWN, CAM_REQUEUE_REQ);
+static void
+ahc_linux_dv_su(struct ahc_softc *ahc, struct scsi_cmnd *cmd,
+ struct ahc_devinfo *devinfo,
+ struct ahc_linux_target *targ)
+{
+ u_int le;
+
+ le = SID_IS_REMOVABLE(targ->inq_data) ? SSS_LOEJ : 0;
+
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Sending SU\n");
+ }
+#endif
+ ahc_linux_dv_fill_cmd(ahc, cmd, devinfo);
+ cmd->sc_data_direction = SCSI_DATA_NONE;
+ cmd->cmd_len = 6;
+ cmd->cmnd[0] = START_STOP_UNIT;
+ cmd->cmnd[4] = le | SSS_START;
}
-void
-ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
- ahc_queue_alg alg)
+static int
+ahc_linux_fallback(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
{
- struct ahc_linux_device *dev;
- int was_queuing;
- int now_queuing;
-
- dev = ahc_linux_get_device(ahc, devinfo->channel - 'A',
- devinfo->target,
- devinfo->lun, /*alloc*/FALSE);
- if (dev == NULL)
- return;
- was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
- now_queuing = alg != AHC_QUEUE_NONE;
- if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
- && (was_queuing != now_queuing)
- && (dev->active != 0)) {
- dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
- dev->qfrozen++;
+ struct ahc_linux_target *targ;
+ struct ahc_initiator_tinfo *tinfo;
+ struct ahc_transinfo *goal;
+ struct ahc_tmode_tstate *tstate;
+ struct ahc_syncrate *syncrate;
+ u_long s;
+ u_int width;
+ u_int period;
+ u_int offset;
+ u_int ppr_options;
+ u_int cur_speed;
+ u_int wide_speed;
+ u_int narrow_speed;
+ u_int fallback_speed;
+
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ ahc_print_devinfo(ahc, devinfo);
+ printf("Trying to fallback\n");
+ }
+#endif
+ ahc_lock(ahc, &s);
+ targ = ahc->platform_data->targets[devinfo->target_offset];
+ tinfo = ahc_fetch_transinfo(ahc, devinfo->channel,
+ devinfo->our_scsiid,
+ devinfo->target, &tstate);
+ goal = &tinfo->goal;
+ width = goal->width;
+ period = goal->period;
+ offset = goal->offset;
+ ppr_options = goal->ppr_options;
+ if (offset == 0)
+ period = AHC_ASYNC_XFER_PERIOD;
+ if (targ->dv_next_narrow_period == 0)
+ targ->dv_next_narrow_period = MAX(period, AHC_SYNCRATE_ULTRA2);
+ if (targ->dv_next_wide_period == 0)
+ targ->dv_next_wide_period = period;
+ if (targ->dv_max_width == 0)
+ targ->dv_max_width = width;
+ if (targ->dv_max_ppr_options == 0)
+ targ->dv_max_ppr_options = ppr_options;
+ if (targ->dv_last_ppr_options == 0)
+ targ->dv_last_ppr_options = ppr_options;
+
+ cur_speed = aic_calc_speed(width, period, offset, AHC_SYNCRATE_MIN);
+ wide_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT,
+ targ->dv_next_wide_period,
+ MAX_OFFSET,
+ AHC_SYNCRATE_MIN);
+ narrow_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT,
+ targ->dv_next_narrow_period,
+ MAX_OFFSET,
+ AHC_SYNCRATE_MIN);
+ fallback_speed = aic_calc_speed(width, period+1, offset,
+ AHC_SYNCRATE_MIN);
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, "
+ "fallback_speed= %d\n", cur_speed, wide_speed,
+ narrow_speed, fallback_speed);
}
+#endif
- dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
- if (now_queuing) {
- u_int usertags;
+ if (cur_speed > 160000) {
+ /*
+ * Paced/DT/IU_REQ only transfer speeds. All we
+ * can do is fallback in terms of syncrate.
+ */
+ period++;
+ } else if (cur_speed > 80000) {
+ if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
+ /*
+ * Try without IU_REQ as it may be confusing
+ * an expander.
+ */
+ ppr_options &= ~MSG_EXT_PPR_IU_REQ;
+ } else {
+ /*
+ * Paced/DT only transfer speeds. All we
+ * can do is fallback in terms of syncrate.
+ */
+ period++;
+ ppr_options = targ->dv_max_ppr_options;
+ }
+ } else if (cur_speed > 3300) {
- usertags = ahc_linux_user_tagdepth(ahc, devinfo);
- if (!was_queuing) {
+ /*
+ * In this range we the following
+ * options ordered from highest to
+ * lowest desireability:
+ *
+ * o Wide/DT
+ * o Wide/non-DT
+ * o Narrow at a potentally higher sync rate.
+ *
+ * All modes are tested with and without IU_REQ
+ * set since using IUs may confuse an expander.
+ */
+ if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
+
+ ppr_options &= ~MSG_EXT_PPR_IU_REQ;
+ } else if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
/*
- * Start out agressively and allow our
- * dynamic queue depth algorithm to take
- * care of the rest.
+ * Try going non-DT.
*/
- dev->maxtags = usertags;
- dev->openings = dev->maxtags - dev->active;
+ ppr_options = targ->dv_max_ppr_options;
+ ppr_options &= ~MSG_EXT_PPR_DT_REQ;
+ } else if (targ->dv_last_ppr_options != 0) {
+ /*
+ * Try without QAS or any other PPR options.
+ * We may need a non-PPR message to work with
+ * an expander. We look at the "last PPR options"
+ * so we will perform this fallback even if the
+ * target responded to our PPR negotiation with
+ * no option bits set.
+ */
+ ppr_options = 0;
+ } else if (width == MSG_EXT_WDTR_BUS_16_BIT) {
+ /*
+ * If the next narrow speed is greater than
+ * the next wide speed, fallback to narrow.
+ * Otherwise fallback to the next DT/Wide setting.
+ * The narrow async speed will always be smaller
+ * than the wide async speed, so handle this case
+ * specifically.
+ */
+ ppr_options = targ->dv_max_ppr_options;
+ if (narrow_speed > fallback_speed
+ || period >= AHC_ASYNC_XFER_PERIOD) {
+ targ->dv_next_wide_period = period+1;
+ width = MSG_EXT_WDTR_BUS_8_BIT;
+ period = targ->dv_next_narrow_period;
+ } else {
+ period++;
+ }
+ } else if ((ahc->features & AHC_WIDE) != 0
+ && targ->dv_max_width != 0
+ && wide_speed >= fallback_speed
+ && (targ->dv_next_wide_period <= AHC_ASYNC_XFER_PERIOD
+ || period >= AHC_ASYNC_XFER_PERIOD)) {
+
+ /*
+ * We are narrow. Try falling back
+ * to the next wide speed with
+ * all supported ppr options set.
+ */
+ targ->dv_next_narrow_period = period+1;
+ width = MSG_EXT_WDTR_BUS_16_BIT;
+ period = targ->dv_next_wide_period;
+ ppr_options = targ->dv_max_ppr_options;
+ } else {
+ /* Only narrow fallback is allowed. */
+ period++;
+ ppr_options = targ->dv_max_ppr_options;
}
- if (alg == AHC_QUEUE_TAGGED) {
- dev->flags |= AHC_DEV_Q_TAGGED;
- if (aic7xxx_periodic_otag != 0)
- dev->flags |= AHC_DEV_PERIODIC_OTAG;
- } else
- dev->flags |= AHC_DEV_Q_BASIC;
} else {
- /* We can only have one opening. */
- dev->maxtags = 0;
- dev->openings = 1 - dev->active;
+ ahc_unlock(ahc, &s);
+ return (-1);
+ }
+ offset = MAX_OFFSET;
+ syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
+ AHC_SYNCRATE_DT);
+ ahc_set_width(ahc, devinfo, width, AHC_TRANS_GOAL, FALSE);
+ if (period == 0) {
+ period = 0;
+ offset = 0;
+ ppr_options = 0;
+ if (width == MSG_EXT_WDTR_BUS_8_BIT)
+ targ->dv_next_narrow_period = AHC_ASYNC_XFER_PERIOD;
+ else
+ targ->dv_next_wide_period = AHC_ASYNC_XFER_PERIOD;
}
+ ahc_set_syncrate(ahc, devinfo, syncrate, period, offset,
+ ppr_options, AHC_TRANS_GOAL, FALSE);
+ targ->dv_last_ppr_options = ppr_options;
+ ahc_unlock(ahc, &s);
+ return (0);
}
-int
-ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
- int lun, u_int tag, role_t role, uint32_t status)
+static void
+ahc_linux_dv_timeout(struct scsi_cmnd *cmd)
{
- int chan;
- int maxchan;
- int targ;
- int maxtarg;
- int clun;
- int maxlun;
- int count;
+ struct ahc_softc *ahc;
+ struct scb *scb;
+ u_long flags;
- if (tag != SCB_LIST_NULL)
- return (0);
+ ahc = *((struct ahc_softc **)cmd->device->host->hostdata);
+ ahc_lock(ahc, &flags);
- chan = 0;
- if (channel != ALL_CHANNELS) {
- chan = channel - 'A';
- maxchan = chan + 1;
- } else {
- maxchan = (ahc->features & AHC_TWIN) ? 2 : 1;
- }
- targ = 0;
- if (target != CAM_TARGET_WILDCARD) {
- targ = target;
- maxtarg = targ + 1;
- } else {
- maxtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV) {
+ printf("%s: Timeout while doing DV command %x.\n",
+ ahc_name(ahc), cmd->cmnd[0]);
+ ahc_dump_card_state(ahc);
}
- clun = 0;
- if (lun != CAM_LUN_WILDCARD) {
- clun = lun;
- maxlun = clun + 1;
- } else {
- maxlun = AHC_NUM_LUNS;
+#endif
+
+ /*
+ * Guard against "done race". No action is
+ * required if we just completed.
+ */
+ if ((scb = (struct scb *)cmd->host_scribble) == NULL) {
+ ahc_unlock(ahc, &flags);
+ return;
}
- count = 0;
- for (; chan < maxchan; chan++) {
+ /*
+ * Command has not completed. Mark this
+ * SCB as having failing status prior to
+ * resetting the bus, so we get the correct
+ * error code.
+ */
+ if ((scb->flags & SCB_SENSE) != 0)
+ ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
+ else
+ ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
+ ahc_reset_channel(ahc, cmd->device->channel + 'A', /*initiate*/TRUE);
- for (; targ < maxtarg; targ++) {
+ /*
+ * Add a minimal bus settle delay for devices that are slow to
+ * respond after bus resets.
+ */
+ ahc_linux_freeze_simq(ahc);
+ init_timer(&ahc->platform_data->reset_timer);
+ ahc->platform_data->reset_timer.data = (u_long)ahc;
+ ahc->platform_data->reset_timer.expires = jiffies + HZ / 2;
+ ahc->platform_data->reset_timer.function =
+ (ahc_linux_callback_t *)ahc_linux_release_simq;
+ add_timer(&ahc->platform_data->reset_timer);
+ if (ahc_linux_next_device_to_run(ahc) != NULL)
+ ahc_schedule_runq(ahc);
+ ahc_linux_run_complete_queue(ahc);
+ ahc_unlock(ahc, &flags);
+}
- for (; clun < maxlun; clun++) {
- struct ahc_linux_device *dev;
- struct ahc_busyq *busyq;
- struct ahc_cmd *acmd;
+static void
+ahc_linux_dv_complete(struct scsi_cmnd *cmd)
+{
+ struct ahc_softc *ahc;
- dev = ahc_linux_get_device(ahc, chan,
- targ, clun,
- /*alloc*/FALSE);
- if (dev == NULL)
- continue;
+ ahc = *((struct ahc_softc **)cmd->device->host->hostdata);
- busyq = &dev->busyq;
- while ((acmd = TAILQ_FIRST(busyq)) != NULL) {
- Scsi_Cmnd *cmd;
+ /* Delete the DV timer before it goes off! */
+ scsi_delete_timer(cmd);
- cmd = &acmd_scsi_cmd(acmd);
- TAILQ_REMOVE(busyq, acmd,
- acmd_links.tqe);
- count++;
- cmd->result = status << 16;
- ahc_linux_queue_cmd_complete(ahc, cmd);
- }
- }
- }
- }
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_DV)
+ printf("%s:%d:%d: Command completed, status= 0x%x\n",
+ ahc_name(ahc), cmd->device->channel,
+ cmd->device->id, cmd->result);
+#endif
- return (count);
+ /* Wake up the state machine */
+ up(&ahc->platform_data->dv_cmd_sem);
}
-/*
- * Sets the queue depth for each SCSI device hanging
- * off the input host adapter.
- */
static void
-ahc_linux_select_queue_depth(struct Scsi_Host * host,
- Scsi_Device * scsi_devs)
+ahc_linux_generate_dv_pattern(struct ahc_linux_target *targ)
{
- Scsi_Device *device;
- struct ahc_softc *ahc;
- u_long flags;
- int scbnum;
+ uint16_t b;
+ u_int i;
+ u_int j;
+
+ if (targ->dv_buffer != NULL)
+ free(targ->dv_buffer, M_DEVBUF);
+ targ->dv_buffer = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
+ if (targ->dv_buffer1 != NULL)
+ free(targ->dv_buffer1, M_DEVBUF);
+ targ->dv_buffer1 = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
- ahc = *((struct ahc_softc **)host->hostdata);
- ahc_lock(ahc, &flags);
- scbnum = 0;
- for (device = scsi_devs; device != NULL; device = device->next) {
- if (device->host == host) {
- ahc_linux_device_queue_depth(ahc, device);
- scbnum += device->queue_depth;
+ i = 0;
+ b = 0x0001;
+ for (j = 0 ; i < targ->dv_echo_size; j++) {
+ if (j < 32) {
+ /*
+ * 32bytes of sequential numbers.
+ */
+ targ->dv_buffer[i++] = j & 0xff;
+ } else if (j < 48) {
+ /*
+ * 32bytes of repeating 0x0000, 0xffff.
+ */
+ targ->dv_buffer[i++] = (j & 0x02) ? 0xff : 0x00;
+ } else if (j < 64) {
+ /*
+ * 32bytes of repeating 0x5555, 0xaaaa.
+ */
+ targ->dv_buffer[i++] = (j & 0x02) ? 0xaa : 0x55;
+ } else {
+ /*
+ * Remaining buffer is filled with a repeating
+ * patter of:
+ *
+ * 0xffff
+ * ~0x0001 << shifted once in each loop.
+ */
+ if (j & 0x02) {
+ if (j & 0x01) {
+ targ->dv_buffer[i++] = ~(b >> 8) & 0xff;
+ b <<= 1;
+ if (b == 0x0000)
+ b = 0x0001;
+ } else {
+ targ->dv_buffer[i++] = (~b & 0xff);
+ }
+ } else {
+ targ->dv_buffer[i++] = 0xff;
+ }
}
}
- ahc_unlock(ahc, &flags);
}
static u_int
@@ -1572,17 +3553,17 @@
tags = 0;
if ((ahc->user_discenable & devinfo->target_mask) != 0) {
- if (warned_user == 0
- && ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
+ if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
+ if (warned_user == 0) {
- printf("aic7xxx: WARNING, insufficient "
- "tag_info instances for installed "
- "controllers. Using defaults\n");
- printf("aic7xxx: Please update the "
- "aic7xxx_tag_info array in the "
- "aic7xxx.c source file.\n");
+ printf(KERN_WARNING
+"aic7xxx: WARNING: Insufficient tag_info instances\n"
+"aic7xxx: for installed controllers. Using defaults\n"
+"aic7xxx: Please update the aic7xxx_tag_info array in\n"
+"aic7xxx: the aic7xxx_osm..c source file.\n");
+ warned_user++;
+ }
tags = AHC_MAX_QUEUE;
- warned_user++;
} else {
adapter_tag_info_t *tag_info;
@@ -1595,74 +3576,75 @@
return (tags);
}
+static u_int
+ahc_linux_user_dv_setting(struct ahc_softc *ahc)
+{
+ static int warned_user;
+ int dv;
+
+ if (ahc->unit >= NUM_ELEMENTS(aic7xxx_dv_settings)) {
+ if (warned_user == 0) {
+
+ printf(KERN_WARNING
+"aic7xxx: WARNING: Insufficient dv settings instances\n"
+"aic7xxx: for installed controllers. Using defaults\n"
+"aic7xxx: Please update the aic7xxx_dv_settings array\n"
+"aic7xxx: in the aic7xxx_osm.c source file.\n");
+ warned_user++;
+ }
+ dv = -1;
+ } else {
+
+ dv = aic7xxx_dv_settings[ahc->unit];
+ }
+
+ if (dv < 0) {
+ u_long s;
+
+ /*
+ * Apply the default.
+ */
+ /*
+ * XXX - Enable DV on non-U160 controllers once it
+ * has been tested there.
+ */
+ ahc_lock(ahc, &s);
+ dv = (ahc->features & AHC_DT);
+ if (ahc->seep_config != 0
+ && ahc->seep_config->signature >= CFSIGNATURE2)
+ dv = (ahc->seep_config->adapter_control & CFENABLEDV);
+ ahc_unlock(ahc, &s);
+ }
+ return (dv);
+}
+
/*
* Determines the queue depth for a given device.
*/
static void
-ahc_linux_device_queue_depth(struct ahc_softc *ahc, Scsi_Device * device)
+ahc_linux_device_queue_depth(struct ahc_softc *ahc,
+ struct ahc_linux_device *dev)
{
struct ahc_devinfo devinfo;
u_int tags;
ahc_compile_devinfo(&devinfo,
- device->channel == 0 ? ahc->our_id : ahc->our_id_b,
- device->id, device->lun,
- device->channel == 0 ? 'A' : 'B',
+ dev->target->channel == 0
+ ? ahc->our_id : ahc->our_id_b,
+ dev->target->target, dev->lun,
+ dev->target->channel == 0 ? 'A' : 'B',
ROLE_INITIATOR);
tags = ahc_linux_user_tagdepth(ahc, &devinfo);
if (tags != 0
- && device->tagged_supported != 0) {
+ && dev->scsi_device != NULL
+ && dev->scsi_device->tagged_supported != 0) {
- device->queue_depth = tags;
ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
- printf("scsi%d:%c:%d:%d: Tagged Queuing enabled. Depth %d\n",
- ahc->platform_data->host->host_no, devinfo.channel,
- devinfo.target, devinfo.lun, tags);
+ ahc_print_devinfo(ahc, &devinfo);
+ printf("Tagged Queuing enabled. Depth %d\n", tags);
} else {
- /*
- * We allow the OS to queue 2 untagged transactions to
- * us at any time even though we can only execute them
- * serially on the controller/device. This should remove
- * some latency.
- */
- device->queue_depth = 2;
- }
-}
-
-/*
- * Queue an SCB to the controller.
- */
-int
-ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
-{
- struct ahc_softc *ahc;
- struct ahc_linux_device *dev;
- u_long flags;
-
- ahc = *(struct ahc_softc **)cmd->host->hostdata;
-
- /*
- * Save the callback on completion function.
- */
- cmd->scsi_done = scsi_done;
-
- ahc_lock(ahc, &flags);
- dev = ahc_linux_get_device(ahc, cmd->channel, cmd->target,
- cmd->lun, /*alloc*/TRUE);
- if (dev == NULL) {
- ahc_unlock(ahc, &flags);
- printf("aic7xxx_linux_queue: Unable to allocate device!\n");
- return (-ENOMEM);
- }
- cmd->result = CAM_REQ_INPROG << 16;
- TAILQ_INSERT_TAIL(&dev->busyq, (struct ahc_cmd *)cmd, acmd_links.tqe);
- if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
- TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
- dev->flags |= AHC_DEV_ON_RUN_LIST;
- ahc_linux_run_device_queues(ahc);
+ ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
}
- ahc_unlock(ahc, &flags);
- return (0);
}
static void
@@ -1686,8 +3668,8 @@
* Schedule us to run later. The only reason we are not
* running is because the whole controller Q is frozen.
*/
- if (ahc->platform_data->qfrozen != 0) {
-
+ if (ahc->platform_data->qfrozen != 0
+ && AHC_DV_SIMQ_FROZEN(ahc) == 0) {
TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq,
dev, links);
dev->flags |= AHC_DEV_ON_RUN_LIST;
@@ -1715,7 +3697,7 @@
*/
hscb->control = 0;
hscb->scsiid = BUILD_SCSIID(ahc, cmd);
- hscb->lun = cmd->lun;
+ hscb->lun = cmd->device->lun;
mask = SCB_GET_TARGET_MASK(ahc, scb);
tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
SCB_GET_OUR_ID(scb),
@@ -1728,12 +3710,26 @@
if ((ahc->user_discenable & mask) != 0)
hscb->control |= DISCENB;
+ if (AHC_DV_CMD(cmd) != 0)
+ scb->flags |= SCB_SILENT;
+
if ((tstate->auto_negotiate & mask) != 0) {
scb->flags |= SCB_AUTO_NEGOTIATE;
scb->hscb->control |= MK_MESSAGE;
}
if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ int msg_bytes;
+ uint8_t tag_msgs[2];
+
+ msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
+ if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
+ hscb->control |= tag_msgs[0];
+ if (tag_msgs[0] == MSG_ORDERED_TASK)
+ dev->commands_since_idle_or_otag = 0;
+ } else
+#endif
if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
&& (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
hscb->control |= MSG_ORDERED_TASK;
@@ -1763,7 +3759,7 @@
cur_seg = (struct scatterlist *)cmd->request_buffer;
nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
- scsi_to_pci_dma_dir(cmd ->sc_data_direction));
+ scsi_to_pci_dma_dir(cmd->sc_data_direction));
end_seg = cur_seg + nseg;
/* Copy the segments into the SG list. */
sg = scb->sg_list;
@@ -1867,41 +3863,29 @@
/*
* SCSI controller interrupt handler.
*/
-void
+irqreturn_t
ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
{
struct ahc_softc *ahc;
- struct ahc_cmd *acmd;
u_long flags;
- struct ahc_linux_device *next_dev;
+ int ours;
ahc = (struct ahc_softc *) dev_id;
ahc_lock(ahc, &flags);
- ahc_intr(ahc);
- acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
- TAILQ_INIT(&ahc->platform_data->completeq);
- next_dev = ahc_linux_next_device_to_run(ahc);
+ ours = ahc_intr(ahc);
+ if (ahc_linux_next_device_to_run(ahc) != NULL)
+ ahc_schedule_runq(ahc);
+ ahc_linux_run_complete_queue(ahc);
ahc_unlock(ahc, &flags);
- if (next_dev) {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- tasklet_schedule(&ahc->platform_data->runq_tasklet);
-#else
- ahc_runq_tasklet((unsigned long)ahc);
-#endif
- }
- if (acmd != NULL)
- ahc_linux_run_complete_queue(ahc, acmd);
+ return IRQ_RETVAL(ours);
}
void
ahc_platform_flushwork(struct ahc_softc *ahc)
{
- struct ahc_cmd *acmd;
- acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
- TAILQ_INIT(&ahc->platform_data->completeq);
- if (acmd != NULL)
- ahc_linux_run_complete_queue(ahc, acmd);
+ while (ahc_linux_run_complete_queue(ahc) != NULL)
+ ;
}
static struct ahc_linux_target*
@@ -1910,6 +3894,10 @@
struct ahc_linux_target *targ;
u_int target_offset;
+ target_offset = target;
+ if (channel != 0)
+ target_offset += 8;
+
targ = malloc(sizeof(*targ), M_DEVBUG, M_NOWAIT);
if (targ == NULL)
return (NULL);
@@ -1917,9 +3905,7 @@
targ->channel = channel;
targ->target = target;
targ->ahc = ahc;
- target_offset = target;
- if (channel != 0)
- target_offset += 8;
+ targ->flags = AHC_DV_REQUIRED;
ahc->platform_data->targets[target_offset] = targ;
return (targ);
}
@@ -1927,12 +3913,41 @@
static void
ahc_linux_free_target(struct ahc_softc *ahc, struct ahc_linux_target *targ)
{
+ struct ahc_devinfo devinfo;
+ struct ahc_initiator_tinfo *tinfo;
+ struct ahc_tmode_tstate *tstate;
+ u_int our_id;
u_int target_offset;
+ char channel;
+ /*
+ * Force a negotiation to async/narrow on any
+ * future command to this device unless a bus
+ * reset occurs between now and that command.
+ */
+ channel = 'A' + targ->channel;
+ our_id = ahc->our_id;
target_offset = targ->target;
- if (targ->channel != 0)
+ if (targ->channel != 0) {
target_offset += 8;
+ our_id = ahc->our_id_b;
+ }
+ tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
+ targ->target, &tstate);
+ ahc_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD,
+ channel, ROLE_INITIATOR);
+ ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
+ AHC_TRANS_GOAL, /*paused*/FALSE);
+ ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
+ AHC_TRANS_GOAL, /*paused*/FALSE);
+ ahc_update_neg_request(ahc, &devinfo, tstate, tinfo, AHC_NEG_ALWAYS);
ahc->platform_data->targets[target_offset] = NULL;
+ if (targ->inq_data != NULL)
+ free(targ->inq_data, M_DEVBUF);
+ if (targ->dv_buffer != NULL)
+ free(targ->dv_buffer, M_DEVBUF);
+ if (targ->dv_buffer1 != NULL)
+ free(targ->dv_buffer1, M_DEVBUF);
free(targ, M_DEVBUF);
}
@@ -1975,43 +3990,16 @@
{
struct ahc_linux_target *targ;
- del_timer(&dev->timer);
+ del_timer_sync(&dev->timer);
targ = dev->target;
targ->devices[dev->lun] = NULL;
free(dev, M_DEVBUF);
targ->refcount--;
- if (targ->refcount == 0)
+ if (targ->refcount == 0
+ && (targ->flags & AHC_DV_REQUIRED) == 0)
ahc_linux_free_target(ahc, targ);
}
-/*
- * Return a string describing the driver.
- */
-const char *
-ahc_linux_info(struct Scsi_Host *host)
-{
- static char buffer[512];
- char ahc_info[256];
- char *bp;
- struct ahc_softc *ahc;
-
- bp = &buffer[0];
- ahc = *(struct ahc_softc **)host->hostdata;
- memset(bp, 0, sizeof(buffer));
- strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
- strcat(bp, AIC7XXX_DRIVER_VERSION);
- strcat(bp, "\n");
- strcat(bp, " <");
- strcat(bp, ahc->description);
- strcat(bp, ">\n");
- strcat(bp, " ");
- ahc_controller_info(ahc, ahc_info);
- strcat(bp, ahc_info);
- strcat(bp, "\n");
-
- return (bp);
-}
-
void
ahc_send_async(struct ahc_softc *ahc, char channel,
u_int target, u_int lun, ac_code code, void *arg)
@@ -2082,7 +4070,31 @@
break;
}
case AC_SENT_BDR:
+ {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ WARN_ON(lun != CAM_LUN_WILDCARD);
+ scsi_report_device_reset(ahc->platform_data->host,
+ channel - 'A', target);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+ Scsi_Device *scsi_dev;
+
+ /*
+ * Find the SCSI device associated with this
+ * request and indicate that a UA is expected.
+ */
+ for (scsi_dev = ahc->platform_data->host->host_queue;
+ scsi_dev != NULL; scsi_dev = scsi_dev->next) {
+ if (channel - 'A' == scsi_dev->channel
+ && target == scsi_dev->id
+ && (lun == CAM_LUN_WILDCARD
+ || lun == scsi_dev->lun)) {
+ scsi_dev->was_reset = 1;
+ scsi_dev->expecting_cc_ua = 1;
+ }
+ }
+#endif
break;
+ }
case AC_BUS_RESET:
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
if (ahc->platform_data->host != NULL) {
@@ -2100,10 +4112,10 @@
* Calls the higher level scsi done function and frees the scb.
*/
void
-ahc_done(struct ahc_softc *ahc, struct scb * scb)
+ahc_done(struct ahc_softc *ahc, struct scb *scb)
{
Scsi_Cmnd *cmd;
- struct ahc_linux_device *dev;
+ struct ahc_linux_device *dev;
LIST_REMOVE(scb, pending_links);
if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
@@ -2125,27 +4137,41 @@
dev = scb->platform_data->dev;
dev->active--;
dev->openings++;
- ahc_linux_unmap_scb(ahc, scb);
- if (scb->flags & SCB_SENSE) {
- memcpy(cmd->sense_buffer, ahc_get_sense_buf(ahc, scb),
- MIN(sizeof(struct scsi_sense_data),
- sizeof(cmd->sense_buffer)));
- cmd->result |= (DRIVER_SENSE << 24);
- } else {
- /*
- * Guard against stale sense data.
- * The Linux mid-layer assumes that sense
- * was retrieved anytime the first byte of
- * the sense buffer looks "sane".
- */
- cmd->sense_buffer[0] = 0;
+ if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
+ cmd->result &= ~(CAM_DEV_QFRZN << 16);
+ dev->qfrozen--;
}
+ ahc_linux_unmap_scb(ahc, scb);
+
+ /*
+ * Guard against stale sense data.
+ * The Linux mid-layer assumes that sense
+ * was retrieved anytime the first byte of
+ * the sense buffer looks "sane".
+ */
+ cmd->sense_buffer[0] = 0;
if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
uint32_t amount_xferred;
amount_xferred =
ahc_get_transfer_length(scb) - ahc_get_residual(scb);
- if (amount_xferred < scb->io_ctx->underflow) {
+ if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
+#ifdef AHC_DEBUG
+ if ((ahc_debug & AHC_SHOW_MISC) != 0) {
+ ahc_print_path(ahc, scb);
+ printf("Set CAM_UNCOR_PARITY\n");
+ }
+#endif
+ ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
+ } else if (amount_xferred < scb->io_ctx->underflow) {
+ u_int i;
+
+ ahc_print_path(ahc, scb);
+ printf("CDB:");
+ for (i = 0; i < scb->io_ctx->cmd_len; i++)
+ printf(" 0x%x", scb->io_ctx->cmnd[i]);
+ printf("\n");
+ ahc_print_path(ahc, scb);
printf("Saw underflow (%ld of %ld bytes). "
"Treated as error\n",
ahc_get_residual(scb),
@@ -2153,20 +4179,21 @@
ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
} else {
ahc_set_transaction_status(scb, CAM_REQ_CMP);
- ahc_linux_sniff_command(ahc, cmd, scb);
}
- } else if (ahc_get_transaction_status(scb) == DID_OK) {
+ } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
ahc_linux_handle_scsi_status(ahc, dev, scb);
- } else if (ahc_get_transaction_status(scb) == DID_NO_CONNECT) {
- /*
- * Should a selection timeout kill the device?
- * That depends on whether the selection timeout
- * is persistent. Since we have no guarantee that
- * the mid-layer will issue an inquiry for this device
- * again, we can't just kill it off.
+ } else if (ahc_get_transaction_status(scb) == CAM_SEL_TIMEOUT) {
dev->flags |= AHC_DEV_UNCONFIGURED;
- */
+ if (AHC_DV_CMD(cmd) == FALSE)
+ dev->target->flags &= ~AHC_DV_REQUIRED;
}
+ /*
+ * Start DV for devices that require it assuming the first command
+ * sent does not result in a selection timeout.
+ */
+ if (ahc_get_transaction_status(scb) != CAM_SEL_TIMEOUT
+ && (dev->target->flags & AHC_DV_REQUIRED) != 0)
+ ahc_linux_start_dv(ahc);
if (dev->openings == 1
&& ahc_get_transaction_status(scb) == CAM_REQ_CMP
@@ -2189,7 +4216,8 @@
if (TAILQ_EMPTY(&dev->busyq)) {
if ((dev->flags & AHC_DEV_UNCONFIGURED) != 0
- && dev->active == 0)
+ && dev->active == 0
+ && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
ahc_linux_free_device(ahc, dev);
} else if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
@@ -2198,17 +4226,38 @@
if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
printf("Recovery SCB completes\n");
- up(&ahc->platform_data->eh_sem);
+ if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
+ || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
+ ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
+ if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
+ ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
+ up(&ahc->platform_data->eh_sem);
+ }
}
ahc_free_scb(ahc, scb);
ahc_linux_queue_cmd_complete(ahc, cmd);
+
+ if ((ahc->platform_data->flags & AHC_DV_WAIT_SIMQ_EMPTY) != 0
+ && LIST_FIRST(&ahc->pending_scbs) == NULL) {
+ ahc->platform_data->flags &= ~AHC_DV_WAIT_SIMQ_EMPTY;
+ up(&ahc->platform_data->dv_sem);
+ }
+
}
static void
ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
struct ahc_linux_device *dev, struct scb *scb)
{
+ struct ahc_devinfo devinfo;
+
+ ahc_compile_devinfo(&devinfo,
+ ahc->our_id,
+ dev->target->target, dev->lun,
+ dev->target->channel == 0 ? 'A' : 'B',
+ ROLE_INITIATOR);
+
/*
* We don't currently trust the mid-layer to
* properly deal with queue full or busy. So,
@@ -2222,6 +4271,45 @@
switch (ahc_get_scsi_status(scb)) {
default:
break;
+ case SCSI_STATUS_CHECK_COND:
+ case SCSI_STATUS_CMD_TERMINATED:
+ {
+ Scsi_Cmnd *cmd;
+
+ /*
+ * Copy sense information to the OS's cmd
+ * structure if it is available.
+ */
+ cmd = scb->io_ctx;
+ if (scb->flags & SCB_SENSE) {
+ u_int sense_size;
+
+ sense_size = MIN(sizeof(struct scsi_sense_data)
+ - ahc_get_sense_residual(scb),
+ sizeof(cmd->sense_buffer));
+ memcpy(cmd->sense_buffer,
+ ahc_get_sense_buf(ahc, scb), sense_size);
+ if (sense_size < sizeof(cmd->sense_buffer))
+ memset(&cmd->sense_buffer[sense_size], 0,
+ sizeof(cmd->sense_buffer) - sense_size);
+ cmd->result |= (DRIVER_SENSE << 24);
+#ifdef AHC_DEBUG
+ if (ahc_debug & AHC_SHOW_SENSE) {
+ int i;
+
+ printf("Copied %d bytes of sense data:",
+ sense_size);
+ for (i = 0; i < sense_size; i++) {
+ if ((i & 0xF) == 0)
+ printf("\n");
+ printf("0x%x ", cmd->sense_buffer[i]);
+ }
+ printf("\n");
+ }
+#endif
+ }
+ break;
+ }
case SCSI_STATUS_QUEUE_FULL:
{
/*
@@ -2267,13 +4355,20 @@
}
ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
ahc_set_scsi_status(scb, SCSI_STATUS_OK);
+ ahc_platform_set_tags(ahc, &devinfo,
+ (dev->flags & AHC_DEV_Q_BASIC)
+ ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
break;
}
/*
* Drop down to a single opening, and treat this
- * as if the target return BUSY SCSI status.
+ * as if the target returned BUSY SCSI status.
*/
dev->openings = 1;
+ ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
+ ahc_platform_set_tags(ahc, &devinfo,
+ (dev->flags & AHC_DEV_Q_BASIC)
+ ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
/* FALLTHROUGH */
}
case SCSI_STATUS_BUSY:
@@ -2301,206 +4396,280 @@
}
static void
-ahc_linux_filter_command(struct ahc_softc *ahc, Scsi_Cmnd *cmd, struct scb *scb)
+ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd)
+{
+ /*
+ * Typically, the complete queue has very few entries
+ * queued to it before the queue is emptied by
+ * ahc_linux_run_complete_queue, so sorting the entries
+ * by generation number should be inexpensive.
+ * We perform the sort so that commands that complete
+ * with an error are retuned in the order origionally
+ * queued to the controller so that any subsequent retries
+ * are performed in order. The underlying ahc routines do
+ * not guarantee the order that aborted commands will be
+ * returned to us.
+ */
+ struct ahc_completeq *completeq;
+ struct ahc_cmd *list_cmd;
+ struct ahc_cmd *acmd;
+
+ /*
+ * Map CAM error codes into Linux Error codes. We
+ * avoid the conversion so that the DV code has the
+ * full error information available when making
+ * state change decisions.
+ */
+ if (AHC_DV_CMD(cmd) == FALSE) {
+ u_int new_status;
+
+ switch (ahc_cmd_get_transaction_status(cmd)) {
+ case CAM_REQ_INPROG:
+ case CAM_REQ_CMP:
+ case CAM_SCSI_STATUS_ERROR:
+ new_status = DID_OK;
+ break;
+ case CAM_REQ_ABORTED:
+ new_status = DID_ABORT;
+ break;
+ case CAM_BUSY:
+ new_status = DID_BUS_BUSY;
+ break;
+ case CAM_REQ_INVALID:
+ case CAM_PATH_INVALID:
+ new_status = DID_BAD_TARGET;
+ break;
+ case CAM_SEL_TIMEOUT:
+ new_status = DID_NO_CONNECT;
+ break;
+ case CAM_SCSI_BUS_RESET:
+ case CAM_BDR_SENT:
+ new_status = DID_RESET;
+ break;
+ case CAM_UNCOR_PARITY:
+ new_status = DID_PARITY;
+ break;
+ case CAM_CMD_TIMEOUT:
+ new_status = DID_TIME_OUT;
+ break;
+ case CAM_UA_ABORT:
+ case CAM_REQ_CMP_ERR:
+ case CAM_AUTOSENSE_FAIL:
+ case CAM_NO_HBA:
+ case CAM_DATA_RUN_ERR:
+ case CAM_UNEXP_BUSFREE:
+ case CAM_SEQUENCE_FAIL:
+ case CAM_CCB_LEN_ERR:
+ case CAM_PROVIDE_FAIL:
+ case CAM_REQ_TERMIO:
+ case CAM_UNREC_HBA_ERROR:
+ case CAM_REQ_TOO_BIG:
+ new_status = DID_ERROR;
+ break;
+ case CAM_REQUEUE_REQ:
+ /*
+ * If we want the request requeued, make sure there
+ * are sufficent retries. In the old scsi error code,
+ * we used to be able to specify a result code that
+ * bypassed the retry count. Now we must use this
+ * hack. We also "fake" a check condition with
+ * a sense code of ABORTED COMMAND. This seems to
+ * evoke a retry even if this command is being sent
+ * via the eh thread. Ick! Ick! Ick!
+ */
+ if (cmd->retries > 0)
+ cmd->retries--;
+ new_status = DID_OK;
+ ahc_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
+ cmd->result |= (DRIVER_SENSE << 24);
+ memset(cmd->sense_buffer, 0,
+ sizeof(cmd->sense_buffer));
+ cmd->sense_buffer[0] = SSD_ERRCODE_VALID
+ | SSD_CURRENT_ERROR;
+ cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
+ break;
+ default:
+ /* We should never get here */
+ new_status = DID_ERROR;
+ break;
+ }
+
+ ahc_cmd_set_transaction_status(cmd, new_status);
+ }
+
+ completeq = &ahc->platform_data->completeq;
+ list_cmd = TAILQ_FIRST(completeq);
+ acmd = (struct ahc_cmd *)cmd;
+ while (list_cmd != NULL
+ && acmd_scsi_cmd(list_cmd).serial_number
+ < acmd_scsi_cmd(acmd).serial_number)
+ list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
+ if (list_cmd != NULL)
+ TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
+ else
+ TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
+}
+
+static void
+ahc_linux_filter_inquiry(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
{
- switch (cmd->cmnd[0]) {
- case INQUIRY:
- {
- struct ahc_devinfo devinfo;
- struct scsi_inquiry *inq;
- struct scsi_inquiry_data *sid;
- struct ahc_initiator_tinfo *tinfo;
- struct ahc_transinfo *user;
- struct ahc_transinfo *goal;
- struct ahc_transinfo *curr;
- struct ahc_tmode_tstate *tstate;
- struct ahc_syncrate *syncrate;
- struct ahc_linux_device *dev;
- u_int scsiid;
- u_int maxsync;
- int transferred_len;
- int minlen;
- u_int width;
- u_int period;
- u_int offset;
- u_int ppr_options;
-
- /*
- * Validate the command. We only want to filter
- * standard inquiry commands, not those querying
- * Vital Product Data.
- */
- inq = (struct scsi_inquiry *)cmd->cmnd;
- if ((inq->byte2 & SI_EVPD) != 0
- || inq->page_code != 0)
- break;
-
- if (cmd->use_sg != 0) {
- printf("%s: SG Inquiry response ignored\n",
- ahc_name(ahc));
- break;
- }
- transferred_len = ahc_get_transfer_length(scb)
- - ahc_get_residual(scb);
- sid = (struct scsi_inquiry_data *)cmd->request_buffer;
+ struct scsi_inquiry_data *sid;
+ struct ahc_initiator_tinfo *tinfo;
+ struct ahc_transinfo *user;
+ struct ahc_transinfo *goal;
+ struct ahc_transinfo *curr;
+ struct ahc_tmode_tstate *tstate;
+ struct ahc_syncrate *syncrate;
+ struct ahc_linux_device *dev;
+ u_int maxsync;
+ u_int width;
+ u_int period;
+ u_int offset;
+ u_int ppr_options;
+ u_int trans_version;
+ u_int prot_version;
- /*
- * Determine if this lun actually exists. If so,
- * hold on to its corresponding device structure.
- * If not, make sure we release the device and
- * don't bother processing the rest of this inquiry
- * command.
- */
- dev = ahc_linux_get_device(ahc, cmd->channel,
- cmd->target, cmd->lun,
- /*alloc*/FALSE);
- if (transferred_len >= 1
- && SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) {
+ /*
+ * Determine if this lun actually exists. If so,
+ * hold on to its corresponding device structure.
+ * If not, make sure we release the device and
+ * don't bother processing the rest of this inquiry
+ * command.
+ */
+ dev = ahc_linux_get_device(ahc, devinfo->channel - 'A',
+ devinfo->target, devinfo->lun,
+ /*alloc*/TRUE);
- dev->flags &= ~AHC_DEV_UNCONFIGURED;
- } else {
- dev->flags |= AHC_DEV_UNCONFIGURED;
- break;
- }
+ sid = (struct scsi_inquiry_data *)dev->target->inq_data;
+ if (SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) {
- /*
- * Update our notion of this device's transfer
- * negotiation capabilities.
- */
- scsiid = BUILD_SCSIID(ahc, cmd);
- ahc_compile_devinfo(&devinfo, SCSIID_OUR_ID(scsiid),
- cmd->target, cmd->lun,
- SCSIID_CHANNEL(ahc, scsiid),
- ROLE_INITIATOR);
- tinfo = ahc_fetch_transinfo(ahc, devinfo.channel,
- devinfo.our_scsiid,
- devinfo.target, &tstate);
- user = &tinfo->user;
- goal = &tinfo->goal;
- curr = &tinfo->curr;
- width = user->width;
- period = user->period;
- offset = user->offset;
- ppr_options = user->ppr_options;
- minlen = offsetof(struct scsi_inquiry_data, version) + 1;
- if (transferred_len >= minlen) {
- curr->protocol_version = SID_ANSI_REV(sid);
+ dev->flags &= ~AHC_DEV_UNCONFIGURED;
+ } else {
+ dev->flags |= AHC_DEV_UNCONFIGURED;
+ return;
+ }
- /*
- * Only attempt SPI3 once we've verified that
- * the device claims to support SPI3 features.
- */
- if (curr->protocol_version < SCSI_REV_2)
- curr->transport_version = SID_ANSI_REV(sid);
- else
- curr->transport_version = SCSI_REV_2;
- }
+ /*
+ * Update our notion of this device's transfer
+ * negotiation capabilities.
+ */
+ tinfo = ahc_fetch_transinfo(ahc, devinfo->channel,
+ devinfo->our_scsiid,
+ devinfo->target, &tstate);
+ user = &tinfo->user;
+ goal = &tinfo->goal;
+ curr = &tinfo->curr;
+ width = user->width;
+ period = user->period;
+ offset = user->offset;
+ ppr_options = user->ppr_options;
+ trans_version = user->transport_version;
+ prot_version = MIN(user->protocol_version, SID_ANSI_REV(sid));
- minlen = offsetof(struct scsi_inquiry_data, flags) + 1;
- if (transferred_len >= minlen
- && (sid->additional_length + 4) >= minlen) {
- if ((sid->flags & SID_WBus16) == 0)
- width = MSG_EXT_WDTR_BUS_8_BIT;
- if ((sid->flags & SID_Sync) == 0) {
- period = 0;
- offset = 0;
- ppr_options = 0;
- }
- } else {
- /* Keep current settings */
- break;
- }
- minlen = offsetof(struct scsi_inquiry_data, spi3data) + 1;
- /*
- * This is a kludge to deal with inquiry requests that
- * are not large enough for us to pull the spi3/4 bits.
- * In this case, we assume that a device that tells us
- * they can provide inquiry data that spans the SPI3
- * bits and says its SCSI3 can handle a PPR request.
- * If the inquiry request has sufficient buffer space to
- * cover SPI3 bits, we honor them regardless of reported
- * SCSI REV. We also allow any device that has had its
- * goal ppr_options set to allow DT speeds to keep that
- * option if a short inquiry occurs that would fail the
- * normal tests outlined above.
- */
- if ((sid->additional_length + 4) >= minlen) {
- if (transferred_len >= minlen) {
- if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0)
- ppr_options = 0;
- } else if ((goal->ppr_options & MSG_EXT_PPR_DT_REQ)== 0)
- ppr_options = 0;
+ /*
+ * Only attempt SPI3/4 once we've verified that
+ * the device claims to support SPI3/4 features.
+ */
+ if (prot_version < SCSI_REV_2)
+ trans_version = SID_ANSI_REV(sid);
+ else
+ trans_version = SCSI_REV_2;
- if (curr->protocol_version > SCSI_REV_2)
- curr->transport_version = 3;
- } else {
- ppr_options = 0;
- }
- ahc_validate_width(ahc, /*tinfo limit*/NULL, &width,
- ROLE_UNKNOWN);
- if ((ahc->features & AHC_ULTRA2) != 0)
- maxsync = AHC_SYNCRATE_DT;
- else if ((ahc->features & AHC_ULTRA) != 0)
- maxsync = AHC_SYNCRATE_ULTRA;
- else
- maxsync = AHC_SYNCRATE_FAST;
+ if ((sid->flags & SID_WBus16) == 0)
+ width = MSG_EXT_WDTR_BUS_8_BIT;
+ if ((sid->flags & SID_Sync) == 0) {
+ period = 0;
+ offset = 0;
+ ppr_options = 0;
+ }
+ if ((sid->spi3data & SID_SPI_QAS) == 0)
+ ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
+ if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0)
+ ppr_options &= MSG_EXT_PPR_QAS_REQ;
+ if ((sid->spi3data & SID_SPI_IUS) == 0)
+ ppr_options &= (MSG_EXT_PPR_DT_REQ
+ | MSG_EXT_PPR_QAS_REQ);
+
+ if (prot_version > SCSI_REV_2
+ && ppr_options != 0)
+ trans_version = user->transport_version;
+
+ ahc_validate_width(ahc, /*tinfo limit*/NULL, &width, ROLE_UNKNOWN);
+ if ((ahc->features & AHC_ULTRA2) != 0)
+ maxsync = AHC_SYNCRATE_DT;
+ else if ((ahc->features & AHC_ULTRA) != 0)
+ maxsync = AHC_SYNCRATE_ULTRA;
+ else
+ maxsync = AHC_SYNCRATE_FAST;
- syncrate = ahc_find_syncrate(ahc, &period,
- &ppr_options, maxsync);
- ahc_validate_offset(ahc, /*tinfo limit*/NULL, syncrate,
- &offset, width, ROLE_UNKNOWN);
- if (offset == 0 || period == 0) {
- period = 0;
- offset = 0;
- ppr_options = 0;
- }
- /* Apply our filtered user settings. */
- ahc_set_width(ahc, &devinfo, width,
- AHC_TRANS_GOAL, /*paused*/FALSE);
- ahc_set_syncrate(ahc, &devinfo, syncrate, period,
- offset, ppr_options, AHC_TRANS_GOAL,
- /*paused*/FALSE);
- break;
- }
- default:
- panic("ahc_linux_filter_command: Unexpected Command type %x\n",
- cmd->cmnd[0]);
- break;
- }
+ syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, maxsync);
+ ahc_validate_offset(ahc, /*tinfo limit*/NULL, syncrate,
+ &offset, width, ROLE_UNKNOWN);
+ if (offset == 0 || period == 0) {
+ period = 0;
+ offset = 0;
+ ppr_options = 0;
+ }
+ /* Apply our filtered user settings. */
+ curr->transport_version = trans_version;
+ curr->protocol_version = prot_version;
+ ahc_set_width(ahc, devinfo, width, AHC_TRANS_GOAL, /*paused*/FALSE);
+ ahc_set_syncrate(ahc, devinfo, syncrate, period,
+ offset, ppr_options, AHC_TRANS_GOAL,
+ /*paused*/FALSE);
}
static void
ahc_linux_sem_timeout(u_long arg)
{
- struct semaphore *sem;
+ struct ahc_softc *ahc;
+ u_long s;
+
+ ahc = (struct ahc_softc *)arg;
- sem = (struct semaphore *)arg;
- up(sem);
+ ahc_lock(ahc, &s);
+ if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
+ ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
+ up(&ahc->platform_data->eh_sem);
+ }
+ ahc_unlock(ahc, &s);
}
static void
-ahc_linux_freeze_sim_queue(struct ahc_softc *ahc)
+ahc_linux_freeze_simq(struct ahc_softc *ahc)
{
ahc->platform_data->qfrozen++;
- if (ahc->platform_data->qfrozen == 1)
+ if (ahc->platform_data->qfrozen == 1) {
scsi_block_requests(ahc->platform_data->host);
+
+ /* XXX What about Twin channels? */
+ ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
+ CAM_LUN_WILDCARD, SCB_LIST_NULL,
+ ROLE_INITIATOR, CAM_REQUEUE_REQ);
+ }
}
static void
-ahc_linux_release_sim_queue(u_long arg)
+ahc_linux_release_simq(u_long arg)
{
struct ahc_softc *ahc;
u_long s;
int unblock_reqs;
ahc = (struct ahc_softc *)arg;
+
unblock_reqs = 0;
ahc_lock(ahc, &s);
if (ahc->platform_data->qfrozen > 0)
ahc->platform_data->qfrozen--;
- if (ahc->platform_data->qfrozen == 0) {
+ if (ahc->platform_data->qfrozen == 0)
unblock_reqs = 1;
+ if (AHC_DV_SIMQ_FROZEN(ahc)
+ && ((ahc->platform_data->flags & AHC_DV_WAIT_SIMQ_RELEASE) != 0)) {
+ ahc->platform_data->flags &= ~AHC_DV_WAIT_SIMQ_RELEASE;
+ up(&ahc->platform_data->dv_sem);
}
+ ahc_schedule_runq(ahc);
ahc_unlock(ahc, &s);
/*
* There is still a race here. The mid-layer
@@ -2508,14 +4677,8 @@
* a bottom half handler to run the queues
* so we can unblock with our own lock held.
*/
- if (unblock_reqs) {
+ if (unblock_reqs)
scsi_unblock_requests(ahc->platform_data->host);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
- tasklet_schedule(&ahc->platform_data->runq_tasklet);
-#else
- ahc_runq_tasklet((unsigned long)ahc);
-#endif
- }
}
static void
@@ -2534,6 +4697,9 @@
if (dev->qfrozen == 0
&& (dev->flags & AHC_DEV_ON_RUN_LIST) == 0)
ahc_linux_run_device_queue(ahc, dev);
+ if (TAILQ_EMPTY(&dev->busyq)
+ && dev->active == 0)
+ ahc_linux_free_device(ahc, dev);
ahc_unlock(ahc, &s);
}
@@ -2549,37 +4715,55 @@
u_int saved_scbptr;
u_int active_scb_index;
u_int last_phase;
+ u_int saved_scsiid;
+ u_int cdb_byte;
int retval;
+ int was_paused;
int paused;
int wait;
int disconnected;
+ pending_scb = NULL;
paused = FALSE;
wait = FALSE;
- ahc = *(struct ahc_softc **)cmd->host->hostdata;
+ ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
acmd = (struct ahc_cmd *)cmd;
printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun,
+ ahc_name(ahc), cmd->device->channel,
+ cmd->device->id, cmd->device->lun,
flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
+ printf("CDB:");
+ for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
+ printf(" 0x%x", cmd->cmnd[cdb_byte]);
+ printf("\n");
+
/*
- * It is a bug that the upper layer takes
- * this lock just prior to calling us.
+ * In all versions of Linux, we have to work around
+ * a major flaw in how the mid-layer is locked down
+ * if we are to sleep successfully in our error handler
+ * while allowing our interrupt handler to run. Since
+ * the midlayer acquires either the io_request_lock or
+ * our lock prior to calling us, we must use the
+ * spin_unlock_irq() method for unlocking our lock.
+ * This will force interrupts to be enabled on the
+ * current CPU. Since the EH thread should not have
+ * been running with CPU interrupts disabled other than
+ * by acquiring either the io_request_lock or our own
+ * lock, this *should* be safe.
*/
- spin_unlock_irq(&io_request_lock);
-
- ahc_lock(ahc, &s);
+ ahc_midlayer_entrypoint_lock(ahc, &s);
/*
* First determine if we currently own this command.
* Start by searching the device queue. If not found
* there, check the pending_scb list. If not found
* at all, and the system wanted us to just abort the
- * command return success.
+ * command, return success.
*/
- dev = ahc_linux_get_device(ahc, cmd->channel, cmd->target,
- cmd->lun, /*alloc*/FALSE);
+ dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
+ cmd->device->lun, /*alloc*/FALSE);
if (dev == NULL) {
/*
@@ -2587,7 +4771,8 @@
* so we must not still own the command.
*/
printf("%s:%d:%d:%d: Is not an active device\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
+ ahc_name(ahc), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
retval = SUCCESS;
goto no_cmd;
}
@@ -2599,7 +4784,8 @@
if (list_acmd != NULL) {
printf("%s:%d:%d:%d: Command found on device queue\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
+ ahc_name(ahc), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
if (flag == SCB_ABORT) {
TAILQ_REMOVE(&dev->busyq, list_acmd, acmd_links.tqe);
cmd->result = DID_ABORT << 16;
@@ -2610,11 +4796,13 @@
}
if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
- && ahc_search_untagged_queues(ahc, cmd, cmd->target,
- cmd->channel + 'A', cmd->lun,
+ && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
+ cmd->device->channel + 'A',
+ cmd->device->lun,
CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
printf("%s:%d:%d:%d: Command found on untagged queue\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
+ ahc_name(ahc), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
retval = SUCCESS;
goto done;
}
@@ -2631,8 +4819,9 @@
/* Any SCB for this device will do for a target reset */
LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
- if (ahc_match_scb(ahc, pending_scb, cmd->target,
- cmd->channel + 'A', CAM_LUN_WILDCARD,
+ if (ahc_match_scb(ahc, pending_scb, cmd->device->id,
+ cmd->device->channel + 'A',
+ CAM_LUN_WILDCARD,
SCB_LIST_NULL, ROLE_INITIATOR) == 0)
break;
}
@@ -2640,7 +4829,8 @@
if (pending_scb == NULL) {
printf("%s:%d:%d:%d: Command not found\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
+ ahc_name(ahc), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
goto no_cmd;
}
@@ -2654,52 +4844,47 @@
/*
* Ensure that the card doesn't do anything
- * behind our back and that no selections have occurred
- * that have not been serviced. Also make sure that we
- * didn't "just" miss an interrupt that would
- * affect this cmd.
- */
- ahc->flags |= AHC_ALL_INTERRUPTS;
- do {
- if (paused)
- ahc_unpause(ahc);
- ahc_intr(ahc);
- ahc_pause(ahc);
- paused = TRUE;
- ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & ~ENSELO);
- ahc_clear_critical_section(ahc);
- } while ((ahc_inb(ahc, INTSTAT) & INT_PEND) != 0
- || (ahc_inb(ahc, SSTAT0) & (SELDO|SELINGO)));
- ahc->flags &= ~AHC_ALL_INTERRUPTS;
-
- ahc_dump_card_state(ahc);
+ * behind our back and that we didn't "just" miss
+ * an interrupt that would affect this cmd.
+ */
+ was_paused = ahc_is_paused(ahc);
+ ahc_pause_and_flushwork(ahc);
+ paused = TRUE;
if ((pending_scb->flags & SCB_ACTIVE) == 0) {
printf("%s:%d:%d:%d: Command already completed\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
+ ahc_name(ahc), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
goto no_cmd;
}
+ printf("%s: At time of recovery, card was %spaused\n",
+ ahc_name(ahc), was_paused ? "" : "not ");
+ ahc_dump_card_state(ahc);
+
disconnected = TRUE;
if (flag == SCB_ABORT) {
- if (ahc_search_qinfifo(ahc, cmd->target, cmd->channel + 'A',
- cmd->lun, pending_scb->hscb->tag,
+ if (ahc_search_qinfifo(ahc, cmd->device->id,
+ cmd->device->channel + 'A',
+ cmd->device->lun,
+ pending_scb->hscb->tag,
ROLE_INITIATOR, CAM_REQ_ABORTED,
SEARCH_COMPLETE) > 0) {
printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
- ahc_name(ahc), cmd->channel, cmd->target,
- cmd->lun);
+ ahc_name(ahc), cmd->device->channel,
+ cmd->device->id, cmd->device->lun);
retval = SUCCESS;
goto done;
}
- } else if (ahc_search_qinfifo(ahc, cmd->target, cmd->channel + 'A',
- cmd->lun, pending_scb->hscb->tag,
+ } else if (ahc_search_qinfifo(ahc, cmd->device->id,
+ cmd->device->channel + 'A',
+ cmd->device->lun, pending_scb->hscb->tag,
ROLE_INITIATOR, /*status*/0,
SEARCH_COUNT) > 0) {
disconnected = FALSE;
}
- if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & IDENTIFY_SEEN) != 0) {
+ if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
struct scb *bus_scb;
bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
@@ -2707,7 +4892,7 @@
disconnected = FALSE;
else if (flag != SCB_ABORT
&& ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
- && ahc_inb(ahc, SAVED_LUN) == pending_scb->hscb->lun)
+ && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
disconnected = FALSE;
}
@@ -2722,10 +4907,11 @@
last_phase = ahc_inb(ahc, LASTPHASE);
saved_scbptr = ahc_inb(ahc, SCBPTR);
active_scb_index = ahc_inb(ahc, SCB_TAG);
+ saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
if (last_phase != P_BUSFREE
&& (pending_scb->hscb->tag == active_scb_index
|| (flag == SCB_DEVICE_RESET
- && SCSIID_TARGET(ahc, ahc_inb(ahc, SAVED_SCSIID)) == cmd->target))) {
+ && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) {
/*
* We're active on the bus, so assert ATN
@@ -2736,7 +4922,8 @@
ahc_outb(ahc, MSG_OUT, HOST_MSG);
ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
+ ahc_name(ahc), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
wait = TRUE;
} else if (disconnected) {
@@ -2766,8 +4953,9 @@
* same element in the SCB, SCB_NEXT, for
* both the qinfifo and the disconnected list.
*/
- ahc_search_disc_list(ahc, cmd->target, cmd->channel + 'A',
- cmd->lun, pending_scb->hscb->tag,
+ ahc_search_disc_list(ahc, cmd->device->id,
+ cmd->device->channel + 'A',
+ cmd->device->lun, pending_scb->hscb->tag,
/*stop_on_first*/TRUE,
/*remove*/TRUE,
/*save_state*/FALSE);
@@ -2790,19 +4978,20 @@
* so we are the next SCB for this target
* to run.
*/
- ahc_search_qinfifo(ahc, cmd->target, cmd->channel + 'A',
- cmd->lun, SCB_LIST_NULL, ROLE_INITIATOR,
- CAM_REQUEUE_REQ, SEARCH_COMPLETE);
- ahc_print_path(ahc, pending_scb);
- printf("Queuing a recovery SCB\n");
+ ahc_search_qinfifo(ahc, cmd->device->id,
+ cmd->device->channel + 'A',
+ cmd->device->lun, SCB_LIST_NULL,
+ ROLE_INITIATOR, CAM_REQUEUE_REQ,
+ SEARCH_COMPLETE);
ahc_qinfifo_requeue_tail(ahc, pending_scb);
ahc_outb(ahc, SCBPTR, saved_scbptr);
- printf("%s:%d:%d:%d: Device is disconnected, re-queuing SCB\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
+ ahc_print_path(ahc, pending_scb);
+ printf("Device is disconnected, re-queuing SCB\n");
wait = TRUE;
} else {
printf("%s:%d:%d:%d: Unable to deliver message\n",
- ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
+ ahc_name(ahc), cmd->device->channel, cmd->device->id,
+ cmd->device->lun);
retval = FAILED;
goto done;
}
@@ -2822,176 +5011,29 @@
struct timer_list timer;
int ret;
- ahc_unlock(ahc, &s);
+ ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
+ spin_unlock_irq(&ahc->platform_data->spin_lock);
init_timer(&timer);
- timer.data = (u_long)&ahc->platform_data->eh_sem;
+ timer.data = (u_long)ahc;
timer.expires = jiffies + (5 * HZ);
timer.function = ahc_linux_sem_timeout;
add_timer(&timer);
printf("Recovery code sleeping\n");
down(&ahc->platform_data->eh_sem);
printf("Recovery code awake\n");
- ret = del_timer(&timer);
+ ret = del_timer_sync(&timer);
if (ret == 0) {
printf("Timer Expired\n");
retval = FAILED;
}
- ahc_lock(ahc, &s);
+ spin_lock_irq(&ahc->platform_data->spin_lock);
}
- acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
- TAILQ_INIT(&ahc->platform_data->completeq);
- ahc_unlock(ahc, &s);
- if (acmd != NULL)
- ahc_linux_run_complete_queue(ahc, acmd);
- ahc_runq_tasklet((unsigned long)ahc);
- spin_lock_irq(&io_request_lock);
+ ahc_schedule_runq(ahc);
+ ahc_linux_run_complete_queue(ahc);
+ ahc_midlayer_entrypoint_unlock(ahc, &s);
return (retval);
}
-/*
- * Abort the current SCSI command(s).
- */
-int
-ahc_linux_abort(Scsi_Cmnd *cmd)
-{
- int error;
-
- error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
- if (error != 0)
- printf("aic7xxx_abort returns 0x%x\n", error);
- return (error);
-}
-
-/*
- * Attempt to send a target reset message to the device that timed out.
- */
-int
-ahc_linux_dev_reset(Scsi_Cmnd *cmd)
-{
- int error;
-
- error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
- if (error != 0)
- printf("aic7xxx_dev_reset returns 0x%x\n", error);
- return (error);
-}
-
-/*
- * Reset the SCSI bus.
- */
-int
-ahc_linux_bus_reset(Scsi_Cmnd *cmd)
-{
- struct ahc_softc *ahc;
- struct ahc_cmd *acmd;
- u_long s;
- int found;
-
- /*
- * It is a bug that the upper layer takes
- * this lock just prior to calling us.
- */
- spin_unlock_irq(&io_request_lock);
-
- ahc = *(struct ahc_softc **)cmd->host->hostdata;
- ahc_lock(ahc, &s);
- found = ahc_reset_channel(ahc, cmd->channel + 'A',
- /*initiate reset*/TRUE);
- acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
- TAILQ_INIT(&ahc->platform_data->completeq);
- ahc_unlock(ahc, &s);
- if (bootverbose)
- printf("%s: SCSI bus reset delivered. "
- "%d SCBs aborted.\n", ahc_name(ahc), found);
-
- if (acmd != NULL)
- ahc_linux_run_complete_queue(ahc, acmd);
-
- spin_lock_irq(&io_request_lock);
- return SUCCESS;
-}
-
-/*
- * Return the disk geometry for the given SCSI device.
- */
-int
-ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
-{
- int heads;
- int sectors;
- int cylinders;
- int ret;
- int extended;
- struct ahc_softc *ahc;
- struct buffer_head *bh;
-
- ahc = *((struct ahc_softc **)disk->device->host->hostdata);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17)
- bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev));
-#else
- bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024);
-#endif
-
- if (bh) {
- ret = scsi_partsize(bh, disk->capacity,
- &geom[2], &geom[0], &geom[1]);
- brelse(bh);
- if (ret != -1)
- return (ret);
- }
- heads = 64;
- sectors = 32;
- cylinders = disk->capacity / (heads * sectors);
-
- if (aic7xxx_extended != 0)
- extended = 1;
- else if (disk->device->channel == 0)
- extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
- else
- extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
- if (extended && cylinders >= 1024) {
- heads = 255;
- sectors = 63;
- cylinders = disk->capacity / (heads * sectors);
- }
- geom[0] = heads;
- geom[1] = sectors;
- geom[2] = cylinders;
- return (0);
-}
-
-/*
- * Free the passed in Scsi_Host memory structures prior to unloading the
- * module.
- */
-int
-ahc_linux_release(struct Scsi_Host * host)
-{
- struct ahc_softc *ahc;
- u_long l;
-
- ahc_list_lock(&l);
- if (host != NULL) {
-
- /*
- * We should be able to just perform
- * the free directly, but check our
- * list for extra sanity.
- */
- ahc = ahc_find_softc(*(struct ahc_softc **)host->hostdata);
- if (ahc != NULL) {
- u_long s;
-
- ahc_lock(ahc, &s);
- ahc_intr_enable(ahc, FALSE);
- ahc_unlock(ahc, &s);
- ahc_free(ahc);
- }
- }
- ahc_list_unlock(&l);
- return (0);
-}
-
void
ahc_platform_dump_card_state(struct ahc_softc *ahc)
{
@@ -3031,8 +5073,57 @@
}
}
-#if defined(MODULE) || LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
-static Scsi_Host_Template driver_template = AIC7XXX;
-Scsi_Host_Template *aic7xxx_driver_template = &driver_template;
-#include "../scsi_module.c"
+static int __init
+ahc_linux_init(void)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+ return (ahc_linux_detect(&aic7xxx_driver_template) ? 0 : -ENODEV);
+#else
+ scsi_register_module(MODULE_SCSI_HA, &aic7xxx_driver_template);
+ if (aic7xxx_driver_template.present == 0) {
+ scsi_unregister_module(MODULE_SCSI_HA,
+ &aic7xxx_driver_template);
+ return (-ENODEV);
+ }
+
+ return (0);
+#endif
+}
+
+static void __exit
+ahc_linux_exit(void)
+{
+ struct ahc_softc *ahc;
+ u_long l;
+
+ /*
+ * Shutdown DV threads before going into the SCSI mid-layer.
+ * This avoids situations where the mid-layer locks the entire
+ * kernel so that waiting for our DV threads to exit leads
+ * to deadlock.
+ */
+ ahc_list_lock(&l);
+ TAILQ_FOREACH(ahc, &ahc_tailq, links) {
+
+ ahc_linux_kill_dv_thread(ahc);
+ }
+ ahc_list_unlock(&l);
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+ /*
+ * In 2.4 we have to unregister from the PCI core _after_
+ * unregistering from the scsi midlayer to avoid dangling
+ * references.
+ */
+ scsi_unregister_module(MODULE_SCSI_HA, &aic7xxx_driver_template);
+#endif
+#ifdef CONFIG_PCI
+ ahc_linux_pci_exit();
+#endif
+#ifdef CONFIG_EISA
+ ahc_linux_eisa_exit();
#endif
+}
+
+module_init(ahc_linux_init);
+module_exit(ahc_linux_exit);
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)