diff options
author | Asai Thambi S P <asamymuthupa@micron.com> | 2011-11-23 08:29:24 +0100 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2011-11-23 08:29:24 +0100 |
commit | 60ec0eecfa8968d0f1188e3730979196ac28b9de (patch) | |
tree | 59c1f3df77df31dc9d851f41ed658952150998b1 /drivers/block/mtip32xx | |
parent | a71f483d7957c74368a76a3a88ae54d524fa3b49 (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/mtip32xx')
-rw-r--r-- | drivers/block/mtip32xx/mtip32xx.c | 342 | ||||
-rw-r--r-- | drivers/block/mtip32xx/mtip32xx.h | 42 |
2 files changed, 230 insertions, 154 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index 880facbb053..b5d843a02bf 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 17be4f444e7..933192abe17 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 |