#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/timer.h>
-#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/compat.h>
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3351},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3352},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3353},
- {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x334D},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3354},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3355},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSF, 0x103C, 0x3356},
{0x3351103C, "Smart Array P420", &SA5_access},
{0x3352103C, "Smart Array P421", &SA5_access},
{0x3353103C, "Smart Array P822", &SA5_access},
- {0x334D103C, "Smart Array P822se", &SA5_access},
{0x3354103C, "Smart Array P420i", &SA5_access},
{0x3355103C, "Smart Array P220i", &SA5_access},
{0x3356103C, "Smart Array P721m", &SA5_access},
static int number_of_controllers;
-static struct list_head hpsa_ctlr_list = LIST_HEAD_INIT(hpsa_ctlr_list);
-static spinlock_t lockup_detector_lock;
-static struct task_struct *hpsa_lockup_detector;
-
static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
}
if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
- if (check_for_unit_attention(h, cp)) {
- cmd->result = DID_SOFT_ERROR << 16;
+ if (check_for_unit_attention(h, cp))
break;
- }
if (sense_key == ILLEGAL_REQUEST) {
/*
* SCSI REPORT_LUNS is commonly unsupported on
"MSA2312",
"MSA2324",
"P2000 G3 SAS",
+ "MSA 2040 SAS",
NULL,
};
hpsa_pci_unmap(h->pdev, c, i,
PCI_DMA_BIDIRECTIONAL);
status = -ENOMEM;
- goto cleanup1;
+ goto cleanup0;
}
c->SG[i].Addr.lower = temp64.val32.lower;
c->SG[i].Addr.upper = temp64.val32.upper;
/* Copy the error information out */
memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
if (copy_to_user(argp, ioc, sizeof(*ioc))) {
- cmd_special_free(h, c);
status = -EFAULT;
- goto cleanup1;
+ goto cleanup0;
}
if (ioc->Request.Type.Direction == XFER_READ && ioc->buf_size > 0) {
/* Copy the data out of the buffer we created */
BYTE __user *ptr = ioc->buf;
for (i = 0; i < sg_used; i++) {
if (copy_to_user(ptr, buff[i], buff_size[i])) {
- cmd_special_free(h, c);
status = -EFAULT;
- goto cleanup1;
+ goto cleanup0;
}
ptr += buff_size[i];
}
}
- cmd_special_free(h, c);
status = 0;
+cleanup0:
+ cmd_special_free(h, c);
cleanup1:
if (buff) {
for (i = 0; i < sg_used; i++)
c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
(void) check_for_unit_attention(h, c);
}
+
+static int increment_passthru_count(struct ctlr_info *h)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&h->passthru_count_lock, flags);
+ if (h->passthru_count >= HPSA_MAX_CONCURRENT_PASSTHRUS) {
+ spin_unlock_irqrestore(&h->passthru_count_lock, flags);
+ return -1;
+ }
+ h->passthru_count++;
+ spin_unlock_irqrestore(&h->passthru_count_lock, flags);
+ return 0;
+}
+
+static void decrement_passthru_count(struct ctlr_info *h)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&h->passthru_count_lock, flags);
+ if (h->passthru_count <= 0) {
+ spin_unlock_irqrestore(&h->passthru_count_lock, flags);
+ /* not expecting to get here. */
+ dev_warn(&h->pdev->dev, "Bug detected, passthru_count seems to be incorrect.\n");
+ return;
+ }
+ h->passthru_count--;
+ spin_unlock_irqrestore(&h->passthru_count_lock, flags);
+}
+
/*
* ioctl
*/
{
struct ctlr_info *h;
void __user *argp = (void __user *)arg;
+ int rc;
h = sdev_to_hba(dev);
case CCISS_GETDRIVVER:
return hpsa_getdrivver_ioctl(h, argp);
case CCISS_PASSTHRU:
- return hpsa_passthru_ioctl(h, argp);
+ if (increment_passthru_count(h))
+ return -EAGAIN;
+ rc = hpsa_passthru_ioctl(h, argp);
+ decrement_passthru_count(h);
+ return rc;
case CCISS_BIG_PASSTHRU:
- return hpsa_big_passthru_ioctl(h, argp);
+ if (increment_passthru_count(h))
+ return -EAGAIN;
+ rc = hpsa_big_passthru_ioctl(h, argp);
+ decrement_passthru_count(h);
+ return rc;
default:
return -ENOTTY;
}
c = list_entry(h->reqQ.next, struct CommandList, list);
/* can't do anything if fifo is full */
if ((h->access.fifo_full(h))) {
+ h->fifo_recently_full = 1;
dev_warn(&h->pdev->dev, "fifo full\n");
break;
}
+ h->fifo_recently_full = 0;
/* Get the first entry from the Request Q */
removeQ(c);
static inline void finish_cmd(struct CommandList *c)
{
unsigned long flags;
+ int io_may_be_stalled = 0;
+ struct ctlr_info *h = c->h;
- spin_lock_irqsave(&c->h->lock, flags);
+ spin_lock_irqsave(&h->lock, flags);
removeQ(c);
- spin_unlock_irqrestore(&c->h->lock, flags);
+
+ /*
+ * Check for possibly stalled i/o.
+ *
+ * If a fifo_full condition is encountered, requests will back up
+ * in h->reqQ. This queue is only emptied out by start_io which is
+ * only called when a new i/o request comes in. If no i/o's are
+ * forthcoming, the i/o's in h->reqQ can get stuck. So we call
+ * start_io from here if we detect such a danger.
+ *
+ * Normally, we shouldn't hit this case, but pounding on the
+ * CCISS_PASSTHRU ioctl can provoke it. Only call start_io if
+ * commands_outstanding is low. We want to avoid calling
+ * start_io from in here as much as possible, and esp. don't
+ * want to get in a cycle where we call start_io every time
+ * through here.
+ */
+ if (unlikely(h->fifo_recently_full) &&
+ h->commands_outstanding < 5)
+ io_may_be_stalled = 1;
+
+ spin_unlock_irqrestore(&h->lock, flags);
+
dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
if (likely(c->cmd_type == CMD_SCSI))
complete_scsi_command(c);
else if (c->cmd_type == CMD_IOCTL_PEND)
complete(c->waiting);
+ if (unlikely(io_may_be_stalled))
+ start_io(h);
}
static inline u32 hpsa_tag_contains_index(u32 tag)
*/
dev_info(&pdev->dev, "using doorbell to reset controller\n");
writel(use_doorbell, vaddr + SA5_DOORBELL);
+
+ /* PMC hardware guys tell us we need a 5 second delay after
+ * doorbell reset and before any attempt to talk to the board
+ * at all to ensure that this actually works and doesn't fall
+ * over in some weird corner cases.
+ */
+ msleep(5000);
} else { /* Try to do it the PCI power state way */
/* Quoting from the Open CISS Specification: "The Power
need a little pause here */
msleep(HPSA_POST_RESET_PAUSE_MSECS);
- /* Wait for board to become not ready, then ready. */
- dev_info(&pdev->dev, "Waiting for board to reset.\n");
- rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY);
- if (rc) {
- dev_warn(&pdev->dev,
- "failed waiting for board to reset."
- " Will try soft reset.\n");
- rc = -ENOTSUPP; /* Not expected, but try soft reset later */
- goto unmap_cfgtable;
- }
rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
if (rc) {
dev_warn(&pdev->dev,
return true;
}
-/* Need to enable prefetch in the SCSI core for 6400 in x86 */
-static inline void hpsa_enable_scsi_prefetch(struct ctlr_info *h)
+static inline void hpsa_set_driver_support_bits(struct ctlr_info *h)
{
-#ifdef CONFIG_X86
- u32 prefetch;
+ u32 driver_support;
- prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
- prefetch |= 0x100;
- writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
+#ifdef CONFIG_X86
+ /* Need to enable prefetch in the SCSI core for 6400 in x86 */
+ driver_support = readl(&(h->cfgtable->driver_support));
+ driver_support |= ENABLE_SCSI_PREFETCH;
#endif
+ driver_support |= ENABLE_UNIT_ATTN;
+ writel(driver_support, &(h->cfgtable->driver_support));
}
/* Disable DMA prefetch for the P600. Otherwise an ASIC bug may result
err = -ENODEV;
goto err_out_free_res;
}
- hpsa_enable_scsi_prefetch(h);
+ hpsa_set_driver_support_bits(h);
hpsa_p600_dma_prefetch_quirk(h);
err = hpsa_enter_simple_mode(h);
if (err)
kfree(h);
}
-static void remove_ctlr_from_lockup_detector_list(struct ctlr_info *h)
-{
- assert_spin_locked(&lockup_detector_lock);
- if (!hpsa_lockup_detector)
- return;
- if (h->lockup_detected)
- return; /* already stopped the lockup detector */
- list_del(&h->lockup_list);
-}
-
/* Called when controller lockup detected. */
static void fail_all_cmds_on_list(struct ctlr_info *h, struct list_head *list)
{
{
unsigned long flags;
- assert_spin_locked(&lockup_detector_lock);
- remove_ctlr_from_lockup_detector_list(h);
h->access.set_intr_mask(h, HPSA_INTR_OFF);
spin_lock_irqsave(&h->lock, flags);
h->lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
u32 heartbeat;
unsigned long flags;
- assert_spin_locked(&lockup_detector_lock);
now = get_jiffies_64();
/* If we've received an interrupt recently, we're ok. */
if (time_after64(h->last_intr_timestamp +
h->last_heartbeat_timestamp = now;
}
-static int detect_controller_lockup_thread(void *notused)
+static void hpsa_monitor_ctlr_worker(struct work_struct *work)
{
- struct ctlr_info *h;
unsigned long flags;
-
- while (1) {
- struct list_head *this, *tmp;
-
- schedule_timeout_interruptible(HEARTBEAT_SAMPLE_INTERVAL);
- if (kthread_should_stop())
- break;
- spin_lock_irqsave(&lockup_detector_lock, flags);
- list_for_each_safe(this, tmp, &hpsa_ctlr_list) {
- h = list_entry(this, struct ctlr_info, lockup_list);
- detect_controller_lockup(h);
- }
- spin_unlock_irqrestore(&lockup_detector_lock, flags);
- }
- return 0;
-}
-
-static void add_ctlr_to_lockup_detector_list(struct ctlr_info *h)
-{
- unsigned long flags;
-
- h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
- spin_lock_irqsave(&lockup_detector_lock, flags);
- list_add_tail(&h->lockup_list, &hpsa_ctlr_list);
- spin_unlock_irqrestore(&lockup_detector_lock, flags);
-}
-
-static void start_controller_lockup_detector(struct ctlr_info *h)
-{
- /* Start the lockup detector thread if not already started */
- if (!hpsa_lockup_detector) {
- spin_lock_init(&lockup_detector_lock);
- hpsa_lockup_detector =
- kthread_run(detect_controller_lockup_thread,
- NULL, HPSA);
- }
- if (!hpsa_lockup_detector) {
- dev_warn(&h->pdev->dev,
- "Could not start lockup detector thread\n");
+ struct ctlr_info *h = container_of(to_delayed_work(work),
+ struct ctlr_info, monitor_ctlr_work);
+ detect_controller_lockup(h);
+ if (h->lockup_detected)
+ return;
+ spin_lock_irqsave(&h->lock, flags);
+ if (h->remove_in_progress) {
+ spin_unlock_irqrestore(&h->lock, flags);
return;
}
- add_ctlr_to_lockup_detector_list(h);
-}
-
-static void stop_controller_lockup_detector(struct ctlr_info *h)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&lockup_detector_lock, flags);
- remove_ctlr_from_lockup_detector_list(h);
- /* If the list of ctlr's to monitor is empty, stop the thread */
- if (list_empty(&hpsa_ctlr_list)) {
- spin_unlock_irqrestore(&lockup_detector_lock, flags);
- kthread_stop(hpsa_lockup_detector);
- spin_lock_irqsave(&lockup_detector_lock, flags);
- hpsa_lockup_detector = NULL;
- }
- spin_unlock_irqrestore(&lockup_detector_lock, flags);
+ schedule_delayed_work(&h->monitor_ctlr_work,
+ h->heartbeat_sample_interval);
+ spin_unlock_irqrestore(&h->lock, flags);
}
static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
INIT_LIST_HEAD(&h->reqQ);
spin_lock_init(&h->lock);
spin_lock_init(&h->scan_lock);
+ spin_lock_init(&h->passthru_count_lock);
rc = hpsa_pci_init(h);
if (rc != 0)
goto clean1;
hpsa_hba_inquiry(h);
hpsa_register_scsi(h); /* hook ourselves into SCSI subsystem */
- start_controller_lockup_detector(h);
+
+ /* Monitor the controller for firmware lockups */
+ h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
+ INIT_DELAYED_WORK(&h->monitor_ctlr_work, hpsa_monitor_ctlr_worker);
+ schedule_delayed_work(&h->monitor_ctlr_work,
+ h->heartbeat_sample_interval);
return 0;
clean4:
{
char *flush_buf;
struct CommandList *c;
+ unsigned long flags;
+
+ /* Don't bother trying to flush the cache if locked up */
+ spin_lock_irqsave(&h->lock, flags);
+ if (unlikely(h->lockup_detected)) {
+ spin_unlock_irqrestore(&h->lock, flags);
+ return;
+ }
+ spin_unlock_irqrestore(&h->lock, flags);
flush_buf = kzalloc(4, GFP_KERNEL);
if (!flush_buf)
static void hpsa_remove_one(struct pci_dev *pdev)
{
struct ctlr_info *h;
+ unsigned long flags;
if (pci_get_drvdata(pdev) == NULL) {
dev_err(&pdev->dev, "unable to remove device\n");
return;
}
h = pci_get_drvdata(pdev);
- stop_controller_lockup_detector(h);
+
+ /* Get rid of any controller monitoring work items */
+ spin_lock_irqsave(&h->lock, flags);
+ h->remove_in_progress = 1;
+ cancel_delayed_work(&h->monitor_ctlr_work);
+ spin_unlock_irqrestore(&h->lock, flags);
+
hpsa_unregister_scsi(h); /* unhook from SCSI subsystem */
hpsa_shutdown(pdev);
iounmap(h->vaddr);
projects / firefly-linux-kernel-4.4.55.git / blobdiff