#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
#include <linux/cciss_ioctl.h>
#include <linux/string.h>
#include <linux/bitmap.h>
#include "hpsa.h"
/* HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.' */
-#define HPSA_DRIVER_VERSION "2.0.1-3"
+#define HPSA_DRIVER_VERSION "2.0.2-1"
#define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
/* How long to wait (in milliseconds) for board to go into simple mode */
static void hpsa_scan_start(struct Scsi_Host *);
static int hpsa_scan_finished(struct Scsi_Host *sh,
unsigned long elapsed_time);
+static int hpsa_change_queue_depth(struct scsi_device *sdev,
+ int qdepth, int reason);
static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
static int hpsa_slave_alloc(struct scsi_device *sdev);
.queuecommand = hpsa_scsi_queue_command,
.scan_start = hpsa_scan_start,
.scan_finished = hpsa_scan_finished,
+ .change_queue_depth = hpsa_change_queue_depth,
.this_id = -1,
- .sg_tablesize = MAXSGENTRIES,
.use_clustering = ENABLE_CLUSTERING,
.eh_device_reset_handler = hpsa_eh_device_reset_handler,
.ioctl = hpsa_ioctl,
return (struct ctlr_info *) *priv;
}
-static struct task_struct *hpsa_scan_thread;
-static DEFINE_MUTEX(hpsa_scan_mutex);
-static LIST_HEAD(hpsa_scan_q);
-static int hpsa_scan_func(void *data);
-
-/**
- * add_to_scan_list() - add controller to rescan queue
- * @h: Pointer to the controller.
- *
- * Adds the controller to the rescan queue if not already on the queue.
- *
- * returns 1 if added to the queue, 0 if skipped (could be on the
- * queue already, or the controller could be initializing or shutting
- * down).
- **/
-static int add_to_scan_list(struct ctlr_info *h)
-{
- struct ctlr_info *test_h;
- int found = 0;
- int ret = 0;
-
- if (h->busy_initializing)
- return 0;
-
- /*
- * If we don't get the lock, it means the driver is unloading
- * and there's no point in scheduling a new scan.
- */
- if (!mutex_trylock(&h->busy_shutting_down))
- return 0;
-
- mutex_lock(&hpsa_scan_mutex);
- list_for_each_entry(test_h, &hpsa_scan_q, scan_list) {
- if (test_h == h) {
- found = 1;
- break;
- }
- }
- if (!found && !h->busy_scanning) {
- INIT_COMPLETION(h->scan_wait);
- list_add_tail(&h->scan_list, &hpsa_scan_q);
- ret = 1;
- }
- mutex_unlock(&hpsa_scan_mutex);
- mutex_unlock(&h->busy_shutting_down);
-
- return ret;
-}
-
-/**
- * remove_from_scan_list() - remove controller from rescan queue
- * @h: Pointer to the controller.
- *
- * Removes the controller from the rescan queue if present. Blocks if
- * the controller is currently conducting a rescan. The controller
- * can be in one of three states:
- * 1. Doesn't need a scan
- * 2. On the scan list, but not scanning yet (we remove it)
- * 3. Busy scanning (and not on the list). In this case we want to wait for
- * the scan to complete to make sure the scanning thread for this
- * controller is completely idle.
- **/
-static void remove_from_scan_list(struct ctlr_info *h)
-{
- struct ctlr_info *test_h, *tmp_h;
-
- mutex_lock(&hpsa_scan_mutex);
- list_for_each_entry_safe(test_h, tmp_h, &hpsa_scan_q, scan_list) {
- if (test_h == h) { /* state 2. */
- list_del(&h->scan_list);
- complete_all(&h->scan_wait);
- mutex_unlock(&hpsa_scan_mutex);
- return;
- }
- }
- if (h->busy_scanning) { /* state 3. */
- mutex_unlock(&hpsa_scan_mutex);
- wait_for_completion(&h->scan_wait);
- } else { /* state 1, nothing to do. */
- mutex_unlock(&hpsa_scan_mutex);
- }
-}
-
-/* hpsa_scan_func() - kernel thread used to rescan controllers
- * @data: Ignored.
- *
- * A kernel thread used scan for drive topology changes on
- * controllers. The thread processes only one controller at a time
- * using a queue. Controllers are added to the queue using
- * add_to_scan_list() and removed from the queue either after done
- * processing or using remove_from_scan_list().
- *
- * returns 0.
- **/
-static int hpsa_scan_func(__attribute__((unused)) void *data)
-{
- struct ctlr_info *h;
- int host_no;
-
- while (1) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule();
- if (kthread_should_stop())
- break;
-
- while (1) {
- mutex_lock(&hpsa_scan_mutex);
- if (list_empty(&hpsa_scan_q)) {
- mutex_unlock(&hpsa_scan_mutex);
- break;
- }
- h = list_entry(hpsa_scan_q.next, struct ctlr_info,
- scan_list);
- list_del(&h->scan_list);
- h->busy_scanning = 1;
- mutex_unlock(&hpsa_scan_mutex);
- host_no = h->scsi_host ? h->scsi_host->host_no : -1;
- hpsa_scan_start(h->scsi_host);
- complete_all(&h->scan_wait);
- mutex_lock(&hpsa_scan_mutex);
- h->busy_scanning = 0;
- mutex_unlock(&hpsa_scan_mutex);
- }
- }
- return 0;
-}
-
static int check_for_unit_attention(struct ctlr_info *h,
struct CommandList *c)
{
break;
case REPORT_LUNS_CHANGED:
dev_warn(&h->pdev->dev, "hpsa%d: report LUN data "
- "changed\n", h->ctlr);
+ "changed, action required\n", h->ctlr);
/*
- * Here, we could call add_to_scan_list and wake up the scan thread,
- * except that it's quite likely that we will get more than one
- * REPORT_LUNS_CHANGED condition in quick succession, which means
- * that those which occur after the first one will likely happen
- * *during* the hpsa_scan_thread's rescan. And the rescan code is not
- * robust enough to restart in the middle, undoing what it has already
- * done, and it's not clear that it's even possible to do this, since
- * part of what it does is notify the SCSI mid layer, which starts
- * doing it's own i/o to read partition tables and so on, and the
- * driver doesn't have visibility to know what might need undoing.
- * In any event, if possible, it is horribly complicated to get right
- * so we just don't do it for now.
- *
* Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
*/
break;
struct ctlr_info *h;
struct Scsi_Host *shost = class_to_shost(dev);
h = shost_to_hba(shost);
- if (add_to_scan_list(h)) {
- wake_up_process(hpsa_scan_thread);
- wait_for_completion_interruptible(&h->scan_wait);
- }
+ hpsa_scan_start(h->scsi_host);
return count;
}
spin_lock_init(&h->devlock);
}
+static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
+{
+ int i;
+
+ if (!h->cmd_sg_list)
+ return;
+ for (i = 0; i < h->nr_cmds; i++) {
+ kfree(h->cmd_sg_list[i]);
+ h->cmd_sg_list[i] = NULL;
+ }
+ kfree(h->cmd_sg_list);
+ h->cmd_sg_list = NULL;
+}
+
+static int hpsa_allocate_sg_chain_blocks(struct ctlr_info *h)
+{
+ int i;
+
+ if (h->chainsize <= 0)
+ return 0;
+
+ h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
+ GFP_KERNEL);
+ if (!h->cmd_sg_list)
+ return -ENOMEM;
+ for (i = 0; i < h->nr_cmds; i++) {
+ h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
+ h->chainsize, GFP_KERNEL);
+ if (!h->cmd_sg_list[i])
+ goto clean;
+ }
+ return 0;
+
+clean:
+ hpsa_free_sg_chain_blocks(h);
+ return -ENOMEM;
+}
+
+static void hpsa_map_sg_chain_block(struct ctlr_info *h,
+ struct CommandList *c)
+{
+ struct SGDescriptor *chain_sg, *chain_block;
+ u64 temp64;
+
+ chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
+ chain_block = h->cmd_sg_list[c->cmdindex];
+ chain_sg->Ext = HPSA_SG_CHAIN;
+ chain_sg->Len = sizeof(*chain_sg) *
+ (c->Header.SGTotal - h->max_cmd_sg_entries);
+ temp64 = pci_map_single(h->pdev, chain_block, chain_sg->Len,
+ PCI_DMA_TODEVICE);
+ chain_sg->Addr.lower = (u32) (temp64 & 0x0FFFFFFFFULL);
+ chain_sg->Addr.upper = (u32) ((temp64 >> 32) & 0x0FFFFFFFFULL);
+}
+
+static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
+ struct CommandList *c)
+{
+ struct SGDescriptor *chain_sg;
+ union u64bit temp64;
+
+ if (c->Header.SGTotal <= h->max_cmd_sg_entries)
+ return;
+
+ chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
+ temp64.val32.lower = chain_sg->Addr.lower;
+ temp64.val32.upper = chain_sg->Addr.upper;
+ pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
+}
+
static void complete_scsi_command(struct CommandList *cp,
int timeout, u32 tag)
{
h = cp->h;
scsi_dma_unmap(cmd); /* undo the DMA mappings */
+ if (cp->Header.SGTotal > h->max_cmd_sg_entries)
+ hpsa_unmap_sg_chain_block(h, cp);
cmd->result = (DID_OK << 16); /* host byte */
cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
- cmd->result |= (ei->ScsiStatus << 1);
+ cmd->result |= ei->ScsiStatus;
/* copy the sense data whether we need to or not. */
memcpy(cmd->sense_buffer, ei->SenseInfo,
sh->max_id = HPSA_MAX_LUN;
sh->can_queue = h->nr_cmds;
sh->cmd_per_lun = h->nr_cmds;
+ sh->sg_tablesize = h->maxsgentries;
h->scsi_host = sh;
sh->hostdata[0] = (unsigned long) h;
sh->irq = h->intr[PERF_MODE_INT];
if (c == NULL) { /* trouble... */
dev_warn(&h->pdev->dev, "cmd_special_alloc returned NULL!\n");
- return -1;
+ return -ENOMEM;
}
fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0, scsi3addr, TYPE_MSG);
* dma mapping and fills in the scatter gather entries of the
* hpsa command, cp.
*/
-static int hpsa_scatter_gather(struct pci_dev *pdev,
+static int hpsa_scatter_gather(struct ctlr_info *h,
struct CommandList *cp,
struct scsi_cmnd *cmd)
{
unsigned int len;
struct scatterlist *sg;
u64 addr64;
- int use_sg, i;
+ int use_sg, i, sg_index, chained;
+ struct SGDescriptor *curr_sg;
- BUG_ON(scsi_sg_count(cmd) > MAXSGENTRIES);
+ BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
use_sg = scsi_dma_map(cmd);
if (use_sg < 0)
if (!use_sg)
goto sglist_finished;
+ curr_sg = cp->SG;
+ chained = 0;
+ sg_index = 0;
scsi_for_each_sg(cmd, sg, use_sg, i) {
+ if (i == h->max_cmd_sg_entries - 1 &&
+ use_sg > h->max_cmd_sg_entries) {
+ chained = 1;
+ curr_sg = h->cmd_sg_list[cp->cmdindex];
+ sg_index = 0;
+ }
addr64 = (u64) sg_dma_address(sg);
len = sg_dma_len(sg);
- cp->SG[i].Addr.lower =
- (u32) (addr64 & (u64) 0x00000000FFFFFFFF);
- cp->SG[i].Addr.upper =
- (u32) ((addr64 >> 32) & (u64) 0x00000000FFFFFFFF);
- cp->SG[i].Len = len;
- cp->SG[i].Ext = 0; /* we are not chaining */
+ curr_sg->Addr.lower = (u32) (addr64 & 0x0FFFFFFFFULL);
+ curr_sg->Addr.upper = (u32) ((addr64 >> 32) & 0x0FFFFFFFFULL);
+ curr_sg->Len = len;
+ curr_sg->Ext = 0; /* we are not chaining */
+ curr_sg++;
+ }
+
+ if (use_sg + chained > h->maxSG)
+ h->maxSG = use_sg + chained;
+
+ if (chained) {
+ cp->Header.SGList = h->max_cmd_sg_entries;
+ cp->Header.SGTotal = (u16) (use_sg + 1);
+ hpsa_map_sg_chain_block(h, cp);
+ return 0;
}
sglist_finished:
break;
}
- if (hpsa_scatter_gather(h->pdev, c, cmd) < 0) { /* Fill SG list */
+ if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
cmd_free(h, c);
return SCSI_MLQUEUE_HOST_BUSY;
}
return finished;
}
+static int hpsa_change_queue_depth(struct scsi_device *sdev,
+ int qdepth, int reason)
+{
+ struct ctlr_info *h = sdev_to_hba(sdev);
+
+ if (reason != SCSI_QDEPTH_DEFAULT)
+ return -ENOTSUPP;
+
+ if (qdepth < 1)
+ qdepth = 1;
+ else
+ if (qdepth > h->nr_cmds)
+ qdepth = h->nr_cmds;
+ scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
+ return sdev->queue_depth;
+}
+
static void hpsa_unregister_scsi(struct ctlr_info *h)
{
/* we are being forcibly unloaded, and may not refuse. */
return IRQ_HANDLED;
}
-/* Send a message CDB to the firmwart. */
+/* Send a message CDB to the firmware. */
static __devinit int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
unsigned char type)
{
h->intr[PERF_MODE_INT] = pdev->irq;
}
-static int hpsa_pci_init(struct ctlr_info *h, struct pci_dev *pdev)
+static int __devinit hpsa_pci_init(struct ctlr_info *h, struct pci_dev *pdev)
{
ushort subsystem_vendor_id, subsystem_device_id, command;
u32 board_id, scratchpad = 0;
h->board_id = board_id;
h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
+ h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
+
+ /*
+ * Limit in-command s/g elements to 32 save dma'able memory.
+ * Howvever spec says if 0, use 31
+ */
+
+ h->max_cmd_sg_entries = 31;
+ if (h->maxsgentries > 512) {
+ h->max_cmd_sg_entries = 32;
+ h->chainsize = h->maxsgentries - h->max_cmd_sg_entries + 1;
+ h->maxsgentries--; /* save one for chain pointer */
+ } else {
+ h->maxsgentries = 31; /* default to traditional values */
+ h->chainsize = 0;
+ }
+
h->product_name = products[prod_index].product_name;
h->access = *(products[prod_index].access);
/* Allow room for some ioctls */
h->busy_initializing = 1;
INIT_HLIST_HEAD(&h->cmpQ);
INIT_HLIST_HEAD(&h->reqQ);
- mutex_init(&h->busy_shutting_down);
- init_completion(&h->scan_wait);
rc = hpsa_pci_init(h, pdev);
if (rc != 0)
goto clean1;
rc = -ENOMEM;
goto clean4;
}
+ if (hpsa_allocate_sg_chain_blocks(h))
+ goto clean4;
spin_lock_init(&h->lock);
spin_lock_init(&h->scan_lock);
init_waitqueue_head(&h->scan_wait_queue);
return 1;
clean4:
+ hpsa_free_sg_chain_blocks(h);
kfree(h->cmd_pool_bits);
if (h->cmd_pool)
pci_free_consistent(h->pdev,
return;
}
h = pci_get_drvdata(pdev);
- mutex_lock(&h->busy_shutting_down);
- remove_from_scan_list(h);
hpsa_unregister_scsi(h); /* unhook from SCSI subsystem */
hpsa_shutdown(pdev);
iounmap(h->vaddr);
+ hpsa_free_sg_chain_blocks(h);
pci_free_consistent(h->pdev,
h->nr_cmds * sizeof(struct CommandList),
h->cmd_pool, h->cmd_pool_dhandle);
*/
pci_release_regions(pdev);
pci_set_drvdata(pdev, NULL);
- mutex_unlock(&h->busy_shutting_down);
kfree(h);
}
*/
static int __init hpsa_init(void)
{
- int err;
- /* Start the scan thread */
- hpsa_scan_thread = kthread_run(hpsa_scan_func, NULL, "hpsa_scan");
- if (IS_ERR(hpsa_scan_thread)) {
- err = PTR_ERR(hpsa_scan_thread);
- return -ENODEV;
- }
- err = pci_register_driver(&hpsa_pci_driver);
- if (err)
- kthread_stop(hpsa_scan_thread);
- return err;
+ return pci_register_driver(&hpsa_pci_driver);
}
static void __exit hpsa_cleanup(void)
{
pci_unregister_driver(&hpsa_pci_driver);
- kthread_stop(hpsa_scan_thread);
}
module_init(hpsa_init);
git.openpandora.org / pandora-kernel.git / blobdiff