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authorAsai Thambi S P <asamymuthupa@micron.com>2011-11-23 08:29:24 +0100
committerJens Axboe <axboe@kernel.dk>2011-11-23 08:29:24 +0100
commit60ec0eecfa8968d0f1188e3730979196ac28b9de (patch)
tree59c1f3df77df31dc9d851f41ed658952150998b1 /drivers/block
parenta71f483d7957c74368a76a3a88ae54d524fa3b49 (diff)
mtip32xx: updates based on feedback
* queue ncq commands when a non-ncq is in progress or error handling is active * merge variables 'internal_cmd_in_progress' and 'eh_active' into new variable 'flags' * get rid of read/write semaphore 'internal_sem' * new service thread to issue queued commands * use macros from ata.h for command codes * return ENOTTY for BLKFLSBUF ioctl * style changes Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com> Signed-off-by: Sam Bradshaw <sbradshaw@micron.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/mtip32xx/mtip32xx.c342
-rw-r--r--drivers/block/mtip32xx/mtip32xx.h42
2 files changed, 230 insertions, 154 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 880facbb0534..b5d843a02bfa 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -34,6 +34,7 @@
#include <linux/bio.h>
#include <linux/dma-mapping.h>
#include <linux/idr.h>
+#include <linux/kthread.h>
#include <../drivers/ata/ahci.h>
#include "mtip32xx.h"
@@ -99,15 +100,6 @@ struct mtip_compat_ide_task_request_s {
};
#endif
-static int mtip_exec_internal_command(struct mtip_port *port,
- void *fis,
- int fisLen,
- dma_addr_t buffer,
- int bufLen,
- u32 opts,
- gfp_t atomic,
- unsigned long timeout);
-
/*
* This function check_for_surprise_removal is called
* while card is removed from the system and it will
@@ -414,9 +406,9 @@ static void mtip_init_port(struct mtip_port *port)
port->mmio + PORT_FIS_ADDR_HI);
}
- writel(port->command_list_dma & 0xffffffff,
+ writel(port->command_list_dma & 0xFFFFFFFF,
port->mmio + PORT_LST_ADDR);
- writel(port->rxfis_dma & 0xffffffff, port->mmio + PORT_FIS_ADDR);
+ writel(port->rxfis_dma & 0xFFFFFFFF, port->mmio + PORT_FIS_ADDR);
/* Clear SError */
writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR);
@@ -541,7 +533,7 @@ static void mtip_timeout_function(unsigned long int data)
if (atomic_read(&port->commands[tag].active) &&
(time_after(jiffies, port->commands[tag].comp_time))) {
group = tag >> 5;
- bit = tag & 0x1f;
+ bit = tag & 0x1F;
command = &port->commands[tag];
fis = (struct host_to_dev_fis *) command->command;
@@ -551,7 +543,7 @@ static void mtip_timeout_function(unsigned long int data)
cmdto_cnt++;
if (cmdto_cnt == 1)
- atomic_inc(&port->dd->eh_active);
+ set_bit(MTIP_FLAG_EH_ACTIVE_BIT, &port->flags);
/*
* Clear the completed bit. This should prevent
@@ -589,7 +581,8 @@ static void mtip_timeout_function(unsigned long int data)
"%d commands timed out: restarting port",
cmdto_cnt);
mtip_restart_port(port);
- atomic_dec(&port->dd->eh_active);
+ clear_bit(MTIP_FLAG_EH_ACTIVE_BIT, &port->flags);
+ wake_up_interruptible(&port->svc_wait);
}
/* Restart the timer */
@@ -728,7 +721,7 @@ static void mtip_handle_tfe(struct driver_data *dd)
del_timer(&port->cmd_timer);
/* Set eh_active */
- atomic_inc(&dd->eh_active);
+ set_bit(MTIP_FLAG_EH_ACTIVE_BIT, &port->flags);
/* Loop through all the groups */
for (group = 0; group < dd->slot_groups; group++) {
@@ -835,8 +828,9 @@ static void mtip_handle_tfe(struct driver_data *dd)
}
print_tags(dd, "TFE tags reissued:", tagaccum);
- /* Decrement eh_active */
- atomic_dec(&dd->eh_active);
+ /* clear eh_active */
+ clear_bit(MTIP_FLAG_EH_ACTIVE_BIT, &port->flags);
+ wake_up_interruptible(&port->svc_wait);
mod_timer(&port->cmd_timer,
jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD));
@@ -871,7 +865,6 @@ static inline void mtip_process_sdbf(struct driver_data *dd)
continue;
command = &port->commands[tag];
-
/* make internal callback */
if (likely(command->comp_func)) {
command->comp_func(
@@ -904,9 +897,8 @@ static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat)
struct mtip_port *port = dd->port;
struct mtip_cmd *cmd = &port->commands[MTIP_TAG_INTERNAL];
- if (port->internal_cmd_in_progress &&
- cmd != NULL &&
- !(readl(port->cmd_issue[MTIP_TAG_INTERNAL])
+ if (test_bit(MTIP_FLAG_IC_ACTIVE_BIT, &port->flags) &&
+ (cmd != NULL) && !(readl(port->cmd_issue[MTIP_TAG_INTERNAL])
& (1 << MTIP_TAG_INTERNAL))) {
if (cmd->comp_func) {
cmd->comp_func(port,
@@ -1038,11 +1030,15 @@ static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
to = jiffies + msecs_to_jiffies(timeout);
do {
+ if (test_bit(MTIP_FLAG_SVC_THD_ACTIVE_BIT, &port->flags)) {
+ msleep(20);
+ continue; /* svc thd is actively issuing commands */
+ }
/*
* Ignore s_active bit 0 of array element 0.
* This bit will always be set
*/
- active = readl(port->s_active[0]) & 0xfffffffe;
+ active = readl(port->s_active[0]) & 0xFFFFFFFE;
for (n = 1; n < port->dd->slot_groups; n++)
active |= readl(port->s_active[n]);
@@ -1060,9 +1056,9 @@ static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
*
* @port Pointer to the port data structure.
* @fis Pointer to the FIS that describes the command.
- * @fisLen Length in WORDS of the FIS.
+ * @fis_len Length in WORDS of the FIS.
* @buffer DMA accessible for command data.
- * @bufLen Length, in bytes, of the data buffer.
+ * @buf_len Length, in bytes, of the data buffer.
* @opts Command header options, excluding the FIS length
* and the number of PRD entries.
* @timeout Time in ms to wait for the command to complete.
@@ -1075,9 +1071,9 @@ static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
*/
static int mtip_exec_internal_command(struct mtip_port *port,
void *fis,
- int fisLen,
+ int fis_len,
dma_addr_t buffer,
- int bufLen,
+ int buf_len,
u32 opts,
gfp_t atomic,
unsigned long timeout)
@@ -1100,7 +1096,7 @@ static int mtip_exec_internal_command(struct mtip_port *port,
"Internal command already active\n");
return -EBUSY;
}
- port->internal_cmd_in_progress = 1;
+ set_bit(MTIP_FLAG_IC_ACTIVE_BIT, &port->flags);
if (atomic == GFP_KERNEL) {
/* wait for io to complete if non atomic */
@@ -1108,7 +1104,8 @@ static int mtip_exec_internal_command(struct mtip_port *port,
dev_warn(&port->dd->pdev->dev,
"Failed to quiesce IO\n");
release_slot(port, MTIP_TAG_INTERNAL);
- port->internal_cmd_in_progress = 0;
+ clear_bit(MTIP_FLAG_IC_ACTIVE_BIT, &port->flags);
+ wake_up_interruptible(&port->svc_wait);
return -EBUSY;
}
@@ -1123,19 +1120,23 @@ static int mtip_exec_internal_command(struct mtip_port *port,
}
/* Copy the command to the command table */
- memcpy(int_cmd->command, fis, fisLen*4);
+ memcpy(int_cmd->command, fis, fis_len*4);
/* Populate the SG list */
int_cmd->command_header->opts =
- cpu_to_le32(opts | fisLen);
- if (bufLen) {
+ __force_bit2int cpu_to_le32(opts | fis_len);
+ if (buf_len) {
command_sg = int_cmd->command + AHCI_CMD_TBL_HDR_SZ;
- command_sg->info = cpu_to_le32((bufLen-1) & 0x3fffff);
- command_sg->dba = cpu_to_le32(buffer & 0xffffffff);
- command_sg->dba_upper = cpu_to_le32((buffer >> 16) >> 16);
+ command_sg->info =
+ __force_bit2int cpu_to_le32((buf_len-1) & 0x3FFFFF);
+ command_sg->dba =
+ __force_bit2int cpu_to_le32(buffer & 0xFFFFFFFF);
+ command_sg->dba_upper =
+ __force_bit2int cpu_to_le32((buffer >> 16) >> 16);
- int_cmd->command_header->opts |= cpu_to_le32((1 << 16));
+ int_cmd->command_header->opts |=
+ __force_bit2int cpu_to_le32((1 << 16));
}
/* Populate the command header */
@@ -1151,8 +1152,9 @@ static int mtip_exec_internal_command(struct mtip_port *port,
&wait,
msecs_to_jiffies(timeout)) == 0) {
dev_err(&port->dd->pdev->dev,
- "Internal command did not complete [%d]\n",
- atomic);
+ "Internal command did not complete [%d] "
+ "within timeout of %lu ms\n",
+ atomic, timeout);
rv = -EAGAIN;
}
@@ -1184,7 +1186,8 @@ static int mtip_exec_internal_command(struct mtip_port *port,
/* Clear the allocated and active bits for the internal command. */
atomic_set(&int_cmd->active, 0);
release_slot(port, MTIP_TAG_INTERNAL);
- port->internal_cmd_in_progress = 0;
+ clear_bit(MTIP_FLAG_IC_ACTIVE_BIT, &port->flags);
+ wake_up_interruptible(&port->svc_wait);
return rv;
}
@@ -1233,8 +1236,6 @@ static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer)
int rv = 0;
struct host_to_dev_fis fis;
- down_write(&port->dd->internal_sem);
-
/* Build the FIS. */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
@@ -1292,7 +1293,6 @@ static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer)
}
out:
- up_write(&port->dd->internal_sem);
return rv;
}
@@ -1310,8 +1310,6 @@ static int mtip_standby_immediate(struct mtip_port *port)
int rv;
struct host_to_dev_fis fis;
- down_write(&port->dd->internal_sem);
-
/* Build the FIS. */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
@@ -1328,8 +1326,6 @@ static int mtip_standby_immediate(struct mtip_port *port)
GFP_KERNEL,
15000);
- up_write(&port->dd->internal_sem);
-
return rv;
}
@@ -1430,7 +1426,7 @@ static void mtip_dump_identify(struct mtip_port *port)
((u64)sectors) * ATA_SECT_SIZE >> 20);
pci_read_config_word(port->dd->pdev, PCI_REVISION_ID, &revid);
- switch (revid & 0xff) {
+ switch (revid & 0xFF) {
case 0x1:
strlcpy(cbuf, "A0", 3);
break;
@@ -1470,15 +1466,12 @@ static inline void fill_command_sg(struct driver_data *dd,
if (dma_len > 0x400000)
dev_err(&dd->pdev->dev,
"DMA segment length truncated\n");
- command_sg->info = cpu_to_le32((dma_len-1) & 0x3fffff);
-#if (BITS_PER_LONG == 64)
- *((unsigned long *) &command_sg->dba) =
- cpu_to_le64(sg_dma_address(sg));
-#else
- command_sg->dba = cpu_to_le32(sg_dma_address(sg));
- command_sg->dba_upper =
- cpu_to_le32((sg_dma_address(sg) >> 16) >> 16);
-#endif
+ command_sg->info = __force_bit2int
+ cpu_to_le32((dma_len-1) & 0x3FFFFF);
+ command_sg->dba = __force_bit2int
+ cpu_to_le32(sg_dma_address(sg));
+ command_sg->dba_upper = __force_bit2int
+ cpu_to_le32((sg_dma_address(sg) >> 16) >> 16);
command_sg++;
sg++;
}
@@ -1495,9 +1488,6 @@ static int exec_drive_task(struct mtip_port *port, u8 *command)
struct host_to_dev_fis fis;
struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG);
- /* Lock the internal command semaphore. */
- down_write(&port->dd->internal_sem);
-
/* Build the FIS. */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
@@ -1532,7 +1522,6 @@ static int exec_drive_task(struct mtip_port *port, u8 *command)
0,
GFP_KERNEL,
MTIP_IOCTL_COMMAND_TIMEOUT_MS) < 0) {
- up_write(&port->dd->internal_sem);
return -1;
}
@@ -1549,7 +1538,6 @@ static int exec_drive_task(struct mtip_port *port, u8 *command)
command[4],
command[5]);
- up_write(&port->dd->internal_sem);
return 0;
}
@@ -1572,9 +1560,6 @@ static int exec_drive_command(struct mtip_port *port, u8 *command,
struct host_to_dev_fis fis;
struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG);
- /* Lock the internal command semaphore. */
- down_write(&port->dd->internal_sem);
-
/* Build the FIS. */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
@@ -1584,8 +1569,8 @@ static int exec_drive_command(struct mtip_port *port, u8 *command,
fis.sect_count = command[3];
if (fis.command == ATA_CMD_SMART) {
fis.sector = command[1];
- fis.cyl_low = 0x4f;
- fis.cyl_hi = 0xc2;
+ fis.cyl_low = 0x4F;
+ fis.cyl_hi = 0xC2;
}
dbg_printk(MTIP_DRV_NAME
@@ -1609,7 +1594,6 @@ static int exec_drive_command(struct mtip_port *port, u8 *command,
GFP_KERNEL,
MTIP_IOCTL_COMMAND_TIMEOUT_MS)
< 0) {
- up_write(&port->dd->internal_sem);
return -1;
}
@@ -1630,12 +1614,10 @@ static int exec_drive_command(struct mtip_port *port, u8 *command,
if (copy_to_user(user_buffer,
port->sector_buffer,
ATA_SECT_SIZE * command[3])) {
- up_write(&port->dd->internal_sem);
return -EFAULT;
}
}
- up_write(&port->dd->internal_sem);
return 0;
}
@@ -1658,26 +1640,28 @@ static unsigned int implicit_sector(unsigned char command,
/* list of commands that have an implicit sector count of 1 */
switch (command) {
- case 0xF1:
- case 0xF2:
- case 0xF3:
- case 0xF4:
- case 0xF5:
- case 0xF6:
- case 0xE4:
- case 0xE8:
+ case ATA_CMD_SEC_SET_PASS:
+ case ATA_CMD_SEC_UNLOCK:
+ case ATA_CMD_SEC_ERASE_PREP:
+ case ATA_CMD_SEC_ERASE_UNIT:
+ case ATA_CMD_SEC_FREEZE_LOCK:
+ case ATA_CMD_SEC_DISABLE_PASS:
+ case ATA_CMD_PMP_READ:
+ case ATA_CMD_PMP_WRITE:
rv = 1;
break;
- case 0xF9:
- if (features == 0x03)
+ case ATA_CMD_SET_MAX:
+ if (features == ATA_SET_MAX_UNLOCK)
rv = 1;
break;
- case 0xB0:
- if ((features == 0xD0) || (features == 0xD1))
+ case ATA_CMD_SMART:
+ if ((features == ATA_SMART_READ_VALUES) ||
+ (features == ATA_SMART_READ_THRESHOLDS))
rv = 1;
break;
- case 0xB1:
- if ((features == 0xC2) || (features == 0xC3))
+ case ATA_CMD_CONF_OVERLAY:
+ if ((features == ATA_DCO_IDENTIFY) ||
+ (features == ATA_DCO_SET))
rv = 1;
break;
}
@@ -1777,9 +1761,6 @@ static int exec_drive_taskfile(struct driver_data *dd,
goto abort;
}
- /* Lock the internal command semaphore. */
- down_write(&dd->internal_sem);
-
/* Build the FIS. */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
@@ -1818,7 +1799,6 @@ static int exec_drive_taskfile(struct driver_data *dd,
dev_warn(&dd->pdev->dev,
"data movement but "
"sect_count is 0\n");
- up_write(&dd->internal_sem);
err = -EINVAL;
goto abort;
}
@@ -1838,19 +1818,25 @@ static int exec_drive_taskfile(struct driver_data *dd,
fis.device);
switch (fis.command) {
- case 0x92: /* Change timeout for Download Microcode to 60 seconds.*/
+ case ATA_CMD_DOWNLOAD_MICRO:
+ /* Change timeout for Download Microcode to 60 seconds.*/
timeout = 60000;
break;
- case 0xf4: /* Change timeout for Security Erase Unit to 4 minutes.*/
+ case ATA_CMD_SEC_ERASE_UNIT:
+ /* Change timeout for Security Erase Unit to 4 minutes.*/
timeout = 240000;
break;
- case 0xe0: /* Change timeout for standby immediate to 10 seconds.*/
+ case ATA_CMD_STANDBYNOW1:
+ /* Change timeout for standby immediate to 10 seconds.*/
timeout = 10000;
break;
- case 0xf7: /* Change timeout for vendor unique command to 10 secs */
+ case 0xF7:
+ case 0xFA:
+ /* Change timeout for vendor unique command to 10 secs */
timeout = 10000;
break;
- case 0xfa: /* Change timeout for vendor unique command to 10 secs */
+ case ATA_CMD_SMART:
+ /* Change timeout for vendor unique command to 10 secs */
timeout = 10000;
break;
default:
@@ -1873,7 +1859,6 @@ static int exec_drive_taskfile(struct driver_data *dd,
0,
GFP_KERNEL,
timeout) < 0) {
- up_write(&dd->internal_sem);
err = -EIO;
goto abort;
}
@@ -1916,7 +1901,7 @@ static int exec_drive_taskfile(struct driver_data *dd,
}
/* Com rest after secure erase or lowlevel format */
- if (((fis.command == 0xF4) ||
+ if (((fis.command == ATA_CMD_SEC_ERASE_UNIT) ||
((fis.command == 0xFC) &&
(fis.features == 0x27 || fis.features == 0x72 ||
fis.features == 0x62 || fis.features == 0x26))) &&
@@ -1937,8 +1922,6 @@ static int exec_drive_taskfile(struct driver_data *dd,
req_task->io_ports[5],
req_task->io_ports[6]);
- up_write(&dd->internal_sem);
-
if (taskout) {
if (copy_to_user(buf + outtotal, outbuf, taskout)) {
err = -EFAULT;
@@ -2052,7 +2035,8 @@ static int mtip_hw_ioctl(struct driver_data *dd, unsigned int cmd,
ret = exec_drive_taskfile(dd, (void __user *) arg,
&req_task, outtotal);
- if (copy_to_user((void __user *) arg, &req_task, sizeof(req_task)))
+ if (copy_to_user((void __user *) arg, &req_task,
+ sizeof(req_task)))
return -EFAULT;
return ret;
@@ -2117,13 +2101,13 @@ static void mtip_hw_submit_io(struct driver_data *dd, sector_t start,
fis->opts = 1 << 7;
fis->command =
(dir == READ ? ATA_CMD_FPDMA_READ : ATA_CMD_FPDMA_WRITE);
- *((unsigned int *) &fis->lba_low) = (start & 0xffffff);
- *((unsigned int *) &fis->lba_low_ex) = ((start >> 24) & 0xffffff);
+ *((unsigned int *) &fis->lba_low) = (start & 0xFFFFFF);
+ *((unsigned int *) &fis->lba_low_ex) = ((start >> 24) & 0xFFFFFF);
fis->device = 1 << 6;
if (barrier)
fis->device |= FUA_BIT;
- fis->features = nsect & 0xff;
- fis->features_ex = (nsect >> 8) & 0xff;
+ fis->features = nsect & 0xFF;
+ fis->features_ex = (nsect >> 8) & 0xFF;
fis->sect_count = ((tag << 3) | (tag >> 5));
fis->sect_cnt_ex = 0;
fis->control = 0;
@@ -2132,8 +2116,9 @@ static void mtip_hw_submit_io(struct driver_data *dd, sector_t start,
fill_command_sg(dd, command, nents);
/* Populate the command header */
- command->command_header->opts = cpu_to_le32(
- (nents << 16) | 5 | AHCI_CMD_PREFETCH);
+ command->command_header->opts =
+ __force_bit2int cpu_to_le32(
+ (nents << 16) | 5 | AHCI_CMD_PREFETCH);
command->command_header->byte_count = 0;
/*
@@ -2152,10 +2137,15 @@ static void mtip_hw_submit_io(struct driver_data *dd, sector_t start,
command->async_callback = callback;
/*
- * Lock used to prevent this command from being issued
- * if an internal command is in progress.
+ * To prevent this command from being issued
+ * if an internal command is in progress or error handling is active.
*/
- down_read(&port->dd->internal_sem);
+ if (unlikely(test_bit(MTIP_FLAG_IC_ACTIVE_BIT, &port->flags) ||
+ test_bit(MTIP_FLAG_EH_ACTIVE_BIT, &port->flags))) {
+ set_bit(tag, port->cmds_to_issue);
+ set_bit(MTIP_FLAG_ISSUE_CMDS_BIT, &port->flags);
+ return;
+ }
/* Issue the command to the hardware */
mtip_issue_ncq_command(port, tag);
@@ -2163,8 +2153,6 @@ static void mtip_hw_submit_io(struct driver_data *dd, sector_t start,
/* Set the command's timeout value.*/
port->commands[tag].comp_time = jiffies + msecs_to_jiffies(
MTIP_NCQ_COMMAND_TIMEOUT_MS);
-
- up_read(&port->dd->internal_sem);
}
/*
@@ -2400,10 +2388,9 @@ static int mtip_ftl_rebuild_poll(struct driver_data *dd)
timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS);
do {
-#ifdef CONFIG_HOTPLUG
if (mtip_check_surprise_removal(dd->pdev))
return -EFAULT;
-#endif
+
if (mtip_get_identify(dd->port, NULL) < 0)
return -EFAULT;
@@ -2439,6 +2426,74 @@ static int mtip_ftl_rebuild_poll(struct driver_data *dd)
}
/*
+ * service thread to issue queued commands
+ *
+ * @data Pointer to the driver data structure.
+ *
+ * return value
+ * 0
+ */
+
+static int mtip_service_thread(void *data)
+{
+ struct driver_data *dd = (struct driver_data *)data;
+ unsigned long slot, slot_start, slot_wrap;
+ unsigned int num_cmd_slots = dd->slot_groups * 32;
+ struct mtip_port *port = dd->port;
+
+ while (1) {
+ /*
+ * the condition is to check neither an internal command is
+ * is in progress nor error handling is active
+ */
+ wait_event_interruptible(port->svc_wait, (port->flags) &&
+ !test_bit(MTIP_FLAG_IC_ACTIVE_BIT, &port->flags) &&
+ !test_bit(MTIP_FLAG_EH_ACTIVE_BIT, &port->flags));
+
+ if (kthread_should_stop())
+ break;
+
+ if (test_bit(MTIP_FLAG_ISSUE_CMDS_BIT, &port->flags)) {
+ set_bit(MTIP_FLAG_SVC_THD_ACTIVE_BIT, &port->flags);
+ slot = 1;
+ /* used to restrict the loop to one iteration */
+ slot_start = num_cmd_slots;
+ slot_wrap = 0;
+ while (1) {
+ slot = find_next_bit(port->cmds_to_issue,
+ num_cmd_slots, slot);
+ if (slot_wrap == 1) {
+ if ((slot_start >= slot) ||
+ (slot >= num_cmd_slots))
+ break;
+ }
+ if (unlikely(slot_start == num_cmd_slots))
+ slot_start = slot;
+
+ if (unlikely(slot == num_cmd_slots)) {
+ slot = 1;
+ slot_wrap = 1;
+ continue;
+ }
+
+ /* Issue the command to the hardware */
+ mtip_issue_ncq_command(port, slot);
+
+ /* Set the command's timeout value.*/
+ port->commands[slot].comp_time = jiffies +
+ msecs_to_jiffies(MTIP_NCQ_COMMAND_TIMEOUT_MS);
+
+ clear_bit(slot, port->cmds_to_issue);
+ }
+
+ clear_bit(MTIP_FLAG_ISSUE_CMDS_BIT, &port->flags);
+ clear_bit(MTIP_FLAG_SVC_THD_ACTIVE_BIT, &port->flags);
+ }
+ }
+ return 0;
+}
+
+/*
* Called once for each card.
*
* @dd Pointer to the driver data structure.
@@ -2463,13 +2518,6 @@ static int mtip_hw_init(struct driver_data *dd)
hba_setup(dd);
- /*
- * Initialize the internal semaphore
- * Use a rw semaphore to enable prioritization of
- * mgmnt ioctl traffic during heavy IO load
- */
- init_rwsem(&dd->internal_sem);
-
tasklet_init(&dd->tasklet, mtip_tasklet, (unsigned long)dd);
dd->port = kzalloc(sizeof(struct mtip_port), GFP_KERNEL);
@@ -2541,10 +2589,11 @@ static int mtip_hw_init(struct driver_data *dd)
if (readl(dd->mmio + HOST_CAP) & HOST_CAP_64)
dd->port->commands[i].command_header->ctbau =
- cpu_to_le32(
+ __force_bit2int cpu_to_le32(
(dd->port->commands[i].command_dma >> 16) >> 16);
- dd->port->commands[i].command_header->ctba = cpu_to_le32(
- dd->port->commands[i].command_dma & 0xffffffff);
+ dd->port->commands[i].command_header->ctba =
+ __force_bit2int cpu_to_le32(
+ dd->port->commands[i].command_dma & 0xFFFFFFFF);
/*
* If this is not done, a bug is reported by the stock
@@ -2597,6 +2646,8 @@ static int mtip_hw_init(struct driver_data *dd)
dd->mmio + HOST_CTL);
init_timer(&dd->port->cmd_timer);
+ init_waitqueue_head(&dd->port->svc_wait);
+
dd->port->cmd_timer.data = (unsigned long int) dd->port;
dd->port->cmd_timer.function = mtip_timeout_function;
mod_timer(&dd->port->cmd_timer,
@@ -2667,12 +2718,12 @@ static int mtip_hw_exit(struct driver_data *dd)
del_timer_sync(&dd->port->cmd_timer);
- /* Stop the bottom half tasklet. */
- tasklet_kill(&dd->tasklet);
-
/* Release the IRQ. */
devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
+ /* Stop the bottom half tasklet. */
+ tasklet_kill(&dd->tasklet);
+
/* Free the command/command header memory. */
dmam_free_coherent(&dd->pdev->dev,
HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 2),
@@ -2835,7 +2886,7 @@ static int mtip_block_ioctl(struct block_device *dev,
switch (cmd) {
case BLKFLSBUF:
- return 0;
+ return -ENOTTY;
default:
return mtip_hw_ioctl(dd, cmd, arg);
}
@@ -2870,19 +2921,20 @@ static int mtip_block_compat_ioctl(struct block_device *dev,
switch (cmd) {
case BLKFLSBUF:
- return 0;
+ return -ENOTTY;
case HDIO_DRIVE_TASKFILE: {
- struct mtip_compat_ide_task_request_s *compat_req_task;
+ struct mtip_compat_ide_task_request_s __user *compat_req_task;
ide_task_request_t req_task;
int compat_tasksize, outtotal, ret;
- compat_tasksize = sizeof(struct mtip_compat_ide_task_request_s);
+ compat_tasksize =
+ sizeof(struct mtip_compat_ide_task_request_s);
compat_req_task =
(struct mtip_compat_ide_task_request_s __user *) arg;
if (copy_from_user(&req_task, (void __user *) arg,
- compat_tasksize - (2 * sizeof(compat_long_t))))
+ compat_tasksize - (2 * sizeof(compat_long_t))))
return -EFAULT;
if (get_user(req_task.out_size, &compat_req_task->out_size))
@@ -2950,12 +3002,8 @@ static int mtip_block_getgeo(struct block_device *dev,
geo->heads = 224;
geo->sectors = 56;
-#if BITS_PER_LONG == 64
- geo->cylinders = capacity / (geo->heads * geo->sectors);
-#else
- do_div(capacity, (geo->heads * geo->sectors));
+ sector_div(capacity, (geo->heads * geo->sectors));
geo->cylinders = capacity;
-#endif
return 0;
}
@@ -2999,11 +3047,6 @@ static void mtip_make_request(struct request_queue *queue, struct bio *bio)
return;
}
- if (unlikely(atomic_read(&dd->eh_active))) {
- bio_endio(bio, -EBUSY);
- return;
- }
-
sg = mtip_hw_get_scatterlist(dd, &tag);
if (likely(sg != NULL)) {
blk_queue_bounce(queue, &bio);
@@ -3032,7 +3075,7 @@ static void mtip_make_request(struct request_queue *queue, struct bio *bio)
tag,
bio_endio,
bio,
- bio->bi_rw & REQ_FLUSH,
+ bio->bi_rw & REQ_FUA,
bio_data_dir(bio));
} else
bio_io_error(bio);
@@ -3055,6 +3098,7 @@ static int mtip_block_initialize(struct driver_data *dd)
sector_t capacity;
unsigned int index = 0;
struct kobject *kobj;
+ unsigned char thd_name[16];
/* Initialize the protocol layer. */
rv = mtip_hw_init(dd);
@@ -3082,6 +3126,7 @@ static int mtip_block_initialize(struct driver_data *dd)
blk_queue_max_segments(dd->queue, MTIP_MAX_SG);
blk_queue_physical_block_size(dd->queue, 4096);
blk_queue_io_min(dd->queue, 4096);
+ blk_queue_flush(dd->queue, 0);
dd->disk = alloc_disk(MTIP_MAX_MINORS);
if (dd->disk == NULL) {
@@ -3142,6 +3187,18 @@ static int mtip_block_initialize(struct driver_data *dd)
kobject_put(kobj);
}
+ sprintf(thd_name, "mtip_svc_thd_%02d", index);
+
+ dd->mtip_svc_handler = kthread_run(mtip_service_thread,
+ dd, thd_name);
+
+ if (IS_ERR(dd->mtip_svc_handler)) {
+ printk(KERN_ERR "mtip32xx: service thread failed to start\n");
+ dd->mtip_svc_handler = NULL;
+ rv = -EFAULT;
+ goto read_capacity_error;
+ }
+
return rv;
read_capacity_error:
@@ -3183,6 +3240,13 @@ protocol_init_error:
static int mtip_block_remove(struct driver_data *dd)
{
struct kobject *kobj;
+
+ if (dd->mtip_svc_handler) {
+ set_bit(MTIP_FLAG_SVC_THD_SHOULD_STOP_BIT, &dd->port->flags);
+ wake_up_interruptible(&dd->port->svc_wait);
+ kthread_stop(dd->mtip_svc_handler);
+ }
+
/* Clean up the sysfs attributes managed by the protocol layer. */
kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
if (kobj) {
@@ -3275,7 +3339,6 @@ static int mtip_pci_probe(struct pci_dev *pdev,
atomic_set(&dd->drv_cleanup_done, true);
atomic_set(&dd->resumeflag, false);
- atomic_set(&dd->eh_active, 0);
/* Attach the private data to this PCI device. */
pci_set_drvdata(pdev, dd);
@@ -3317,7 +3380,6 @@ static int mtip_pci_probe(struct pci_dev *pdev,
/* Copy the info we may need later into the private data structure. */
dd->major = mtip_major;
- dd->protocol = ent->driver_data;
dd->instance = instance;
dd->pdev = pdev;
diff --git a/drivers/block/mtip32xx/mtip32xx.h b/drivers/block/mtip32xx/mtip32xx.h
index 17be4f444e7d..933192abe178 100644
--- a/drivers/block/mtip32xx/mtip32xx.h
+++ b/drivers/block/mtip32xx/mtip32xx.h
@@ -47,11 +47,11 @@
/* ftl rebuild */
#define MTIP_FTL_REBUILD_OFFSET 142
-#define MTIP_FTL_REBUILD_MAGIC 0xed51
+#define MTIP_FTL_REBUILD_MAGIC 0xED51
#define MTIP_FTL_REBUILD_TIMEOUT_MS 2400000
/* Macro to extract the tag bit number from a tag value. */
-#define MTIP_TAG_BIT(tag) (tag & 0x1f)
+#define MTIP_TAG_BIT(tag) (tag & 0x1F)
/*
* Macro to extract the tag index from a tag value. The index
@@ -81,7 +81,7 @@
/* Driver name and version strings */
#define MTIP_DRV_NAME "mtip32xx"
-#define MTIP_DRV_VERSION "1.2.6os2"
+#define MTIP_DRV_VERSION "1.2.6os3"
/* Maximum number of minor device numbers per device. */
#define MTIP_MAX_MINORS 16
@@ -114,6 +114,15 @@
#define dbg_printk(format, arg...)
#endif
+#define __force_bit2int (unsigned int __force)
+
+/* below are bit numbers in 'flags' defined in mtip_port */
+#define MTIP_FLAG_IC_ACTIVE_BIT 0
+#define MTIP_FLAG_EH_ACTIVE_BIT 1
+#define MTIP_FLAG_SVC_THD_ACTIVE_BIT 2
+#define MTIP_FLAG_ISSUE_CMDS_BIT 4
+#define MTIP_FLAG_SVC_THD_SHOULD_STOP_BIT 8
+
/* Register Frame Information Structure (FIS), host to device. */
struct host_to_dev_fis {
/*
@@ -262,7 +271,7 @@ struct mtip_cmd {
unsigned long comp_time; /* command completion time, in jiffies */
- atomic_t active; /* declares if this command sent to the drive. */
+ atomic_t active; /* declares if this command sent to the drive. */
};
/* Structure used to describe a port. */
@@ -278,7 +287,7 @@ struct mtip_port {
void __iomem *mmio;
/* Array of pointers to the memory mapped s_active registers. */
void __iomem *s_active[MTIP_MAX_SLOT_GROUPS];
- /* Array of pointers to the memory mapped completed registers. */
+ /* Array of pointers to the memory mapped completed registers. */
void __iomem *completed[MTIP_MAX_SLOT_GROUPS];
/* Array of pointers to the memory mapped Command Issue registers. */
void __iomem *cmd_issue[MTIP_MAX_SLOT_GROUPS];
@@ -340,13 +349,23 @@ struct mtip_port {
*/
unsigned long allocated[SLOTBITS_IN_LONGS];
/*
+ * used to queue commands when an internal command is in progress
+ * or error handling is active
+ */
+ unsigned long cmds_to_issue[SLOTBITS_IN_LONGS];
+ /*
* Array of command slots. Structure includes pointers to the
* command header and command table, and completion function and data
* pointers.
*/
struct mtip_cmd commands[MTIP_MAX_COMMAND_SLOTS];
- /* Non-zero if an internal command is in progress. */
- int internal_cmd_in_progress;
+ /* Used by mtip_service_thread to wait for an event */
+ wait_queue_head_t svc_wait;
+ /*
+ * indicates the state of the port. Also, helps the service thread
+ * to determine its action on wake up.
+ */
+ unsigned long flags;
/*
* Timer used to complete commands that have been active for too long.
*/
@@ -372,18 +391,11 @@ struct driver_data {
int instance; /* Instance number. First device probed is 0, ... */
- int protocol; /* FIXME: Protocol ops array index. */
-
struct gendisk *disk; /* Pointer to our gendisk structure. */
struct pci_dev *pdev; /* Pointer to the PCI device structure. */
struct request_queue *queue; /* Our request queue. */
- /*
- * Semaphore used to lock out read/write commands during the
- * execution of an internal command.
- */
- struct rw_semaphore internal_sem;
struct mtip_port *port; /* Pointer to the port data structure. */
@@ -403,6 +415,8 @@ struct driver_data {
atomic_t resumeflag; /* Atomic variable to track suspend/resume */
atomic_t eh_active; /* Flag for error handling tracking */
+
+ struct task_struct *mtip_svc_handler; /* task_struct of svc thd */
};
#endif