diff options
author | Asai Thambi S P <asamymuthupa@micron.com> | 2012-04-09 08:35:38 +0200 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2012-04-09 08:35:38 +0200 |
commit | 45038367c271f83b649b16551bf2d8174b203cb9 (patch) | |
tree | 3669503784863f51df047f82d4cbce1b4576e65e /drivers/block/mtip32xx | |
parent | 6d27f09a6398ee086b11804aa3a16609876f0c7c (diff) | |
download | linux-stable-45038367c271f83b649b16551bf2d8174b203cb9.tar.gz linux-stable-45038367c271f83b649b16551bf2d8174b203cb9.tar.bz2 linux-stable-45038367c271f83b649b16551bf2d8174b203cb9.zip |
mtip32xx: Add new bitwise flag 'dd_flag'
* Merged the following flags into one variable 'dd_flag':
* drv_cleanup_done
* resumeflag
* Added the following flags into 'dd_flag'
* remove pending
* init done
* Removed 'ftlrebuildflag' (similar flag is already part of mti_port->flags)
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/mtip32xx')
-rw-r--r-- | drivers/block/mtip32xx/mtip32xx.c | 211 | ||||
-rw-r--r-- | drivers/block/mtip32xx/mtip32xx.h | 12 |
2 files changed, 168 insertions, 55 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index c37073ddf7d4..34b395d2d98d 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -36,6 +36,7 @@ #include <linux/idr.h> #include <linux/kthread.h> #include <../drivers/ata/ahci.h> +#include <linux/export.h> #include "mtip32xx.h" #define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32) @@ -44,6 +45,7 @@ #define HW_PORT_PRIV_DMA_SZ \ (HW_CMD_SLOT_SZ + HW_CMD_TBL_AR_SZ + AHCI_RX_FIS_SZ) +#define HOST_CAP_NZDMA (1 << 19) #define HOST_HSORG 0xFC #define HSORG_DISABLE_SLOTGRP_INTR (1<<24) #define HSORG_DISABLE_SLOTGRP_PXIS (1<<16) @@ -139,6 +141,12 @@ static void mtip_command_cleanup(struct driver_data *dd) int group = 0, commandslot = 0, commandindex = 0; struct mtip_cmd *command; struct mtip_port *port = dd->port; + static int in_progress; + + if (in_progress) + return; + + in_progress = 1; for (group = 0; group < 4; group++) { for (commandslot = 0; commandslot < 32; commandslot++) { @@ -165,7 +173,8 @@ static void mtip_command_cleanup(struct driver_data *dd) up(&port->cmd_slot); - atomic_set(&dd->drv_cleanup_done, true); + set_bit(MTIP_DD_FLAG_CLEANUP_BIT, &dd->dd_flag); + in_progress = 0; } /* @@ -262,6 +271,9 @@ static int hba_reset_nosleep(struct driver_data *dd) && time_before(jiffies, timeout)) mdelay(1); + if (test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, &dd->dd_flag)) + return -1; + if (readl(dd->mmio + HOST_CTL) & HOST_RESET) return -1; @@ -451,6 +463,9 @@ static void mtip_restart_port(struct mtip_port *port) && time_before(jiffies, timeout)) ; + if (test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, &port->dd->dd_flag)) + return; + /* * Chip quirk: escalate to hba reset if * PxCMD.CR not clear after 500 ms @@ -479,6 +494,9 @@ static void mtip_restart_port(struct mtip_port *port) while (time_before(jiffies, timeout)) ; + if (test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, &port->dd->dd_flag)) + return; + /* Clear PxSCTL.DET */ writel(readl(port->mmio + PORT_SCR_CTL) & ~1, port->mmio + PORT_SCR_CTL); @@ -490,6 +508,9 @@ static void mtip_restart_port(struct mtip_port *port) && time_before(jiffies, timeout)) ; + if (test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, &port->dd->dd_flag)) + return; + if ((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0) dev_warn(&port->dd->pdev->dev, "COM reset failed\n"); @@ -520,7 +541,7 @@ static void mtip_timeout_function(unsigned long int data) if (unlikely(!port)) return; - if (atomic_read(&port->dd->resumeflag) == true) { + if (test_bit(MTIP_DD_FLAG_RESUME_BIT, &port->dd->dd_flag)) { mod_timer(&port->cmd_timer, jiffies + msecs_to_jiffies(30000)); return; @@ -970,6 +991,9 @@ static inline irqreturn_t mtip_handle_irq(struct driver_data *data) /* don't proceed further */ return IRQ_HANDLED; } + if (test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, + &dd->dd_flag)) + return rv; mtip_process_errors(dd, port_stat & PORT_IRQ_ERR); } @@ -1040,6 +1064,9 @@ static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout) msleep(20); continue; /* svc thd is actively issuing commands */ } + if (test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, + &port->dd->dd_flag)) + return -EFAULT; /* * Ignore s_active bit 0 of array element 0. * This bit will always be set @@ -1161,6 +1188,12 @@ static int mtip_exec_internal_command(struct mtip_port *port, "Internal command did not complete [%d] " "within timeout of %lu ms\n", atomic, timeout); + if (mtip_check_surprise_removal(port->dd->pdev) || + test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, + &port->dd->dd_flag)) { + rv = -ENXIO; + goto exec_ic_exit; + } rv = -EAGAIN; } @@ -1168,6 +1201,15 @@ static int mtip_exec_internal_command(struct mtip_port *port, & (1 << MTIP_TAG_INTERNAL)) { dev_warn(&port->dd->pdev->dev, "Retiring internal command but CI is 1.\n"); + if (test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, + &port->dd->dd_flag)) { + hba_reset_nosleep(port->dd); + rv = -ENXIO; + } else { + mtip_restart_port(port); + rv = -EAGAIN; + } + goto exec_ic_exit; } } else { @@ -1177,8 +1219,14 @@ static int mtip_exec_internal_command(struct mtip_port *port, while ((readl( port->cmd_issue[MTIP_TAG_INTERNAL]) & (1 << MTIP_TAG_INTERNAL)) - && time_before(jiffies, timeout)) - ; + && time_before(jiffies, timeout)) { + if (mtip_check_surprise_removal(port->dd->pdev) || + test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, + &port->dd->dd_flag)) { + rv = -ENXIO; + goto exec_ic_exit; + } + } if (readl(port->cmd_issue[MTIP_TAG_INTERNAL]) & (1 << MTIP_TAG_INTERNAL)) { @@ -1186,9 +1234,17 @@ static int mtip_exec_internal_command(struct mtip_port *port, "Internal command did not complete [%d]\n", atomic); rv = -EAGAIN; + if (test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, + &port->dd->dd_flag)) { + hba_reset_nosleep(port->dd); + rv = -ENXIO; + } else { + mtip_restart_port(port); + rv = -EAGAIN; + } } } - +exec_ic_exit: /* Clear the allocated and active bits for the internal command. */ atomic_set(&int_cmd->active, 0); release_slot(port, MTIP_TAG_INTERNAL); @@ -1242,6 +1298,9 @@ static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer) int rv = 0; struct host_to_dev_fis fis; + if (test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, &port->dd->dd_flag)) + return -EFAULT; + /* Build the FIS. */ memset(&fis, 0, sizeof(struct host_to_dev_fis)); fis.type = 0x27; @@ -1507,9 +1566,7 @@ static int exec_drive_task(struct mtip_port *port, u8 *command) fis.device = command[6] & ~0x10; /* Clear the dev bit*/ - dbg_printk(MTIP_DRV_NAME "%s: User Command: cmd %x, feat %x, " - "nsect %x, sect %x, lcyl %x, " - "hcyl %x, sel %x\n", + dbg_printk(MTIP_DRV_NAME "%s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n", __func__, command[0], command[1], @@ -1536,8 +1593,7 @@ static int exec_drive_task(struct mtip_port *port, u8 *command) command[4] = reply->cyl_low; command[5] = reply->cyl_hi; - dbg_printk(MTIP_DRV_NAME "%s: Completion Status: stat %x, " - "err %x , cyl_lo %x cyl_hi %x\n", + dbg_printk(MTIP_DRV_NAME "%s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n", __func__, command[0], command[1], @@ -2082,14 +2138,10 @@ static void mtip_hw_submit_io(struct driver_data *dd, sector_t start, struct host_to_dev_fis *fis; struct mtip_port *port = dd->port; struct mtip_cmd *command = &port->commands[tag]; + int dma_dir = (dir == READ) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; /* Map the scatter list for DMA access */ - if (dir == READ) - nents = dma_map_sg(&dd->pdev->dev, command->sg, - nents, DMA_FROM_DEVICE); - else - nents = dma_map_sg(&dd->pdev->dev, command->sg, - nents, DMA_TO_DEVICE); + nents = dma_map_sg(&dd->pdev->dev, command->sg, nents, dma_dir); command->scatter_ents = nents; @@ -2129,7 +2181,7 @@ static void mtip_hw_submit_io(struct driver_data *dd, sector_t start, */ command->comp_data = dd; command->comp_func = mtip_async_complete; - command->direction = (dir == READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE); + command->direction = dma_dir; /* * Set the completion function and data for the command passed @@ -2193,6 +2245,10 @@ static struct scatterlist *mtip_hw_get_scatterlist(struct driver_data *dd, down(&dd->port->cmd_slot); *tag = get_slot(dd->port); + if (unlikely(test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, &dd->dd_flag))) { + up(&dd->port->cmd_slot); + return NULL; + } if (unlikely(*tag < 0)) return NULL; @@ -2209,7 +2265,7 @@ static struct scatterlist *mtip_hw_get_scatterlist(struct driver_data *dd, * return value * The size, in bytes, of the data copied into buf. */ -static ssize_t hw_show_registers(struct device *dev, +static ssize_t mtip_hw_show_registers(struct device *dev, struct device_attribute *attr, char *buf) { @@ -2255,7 +2311,7 @@ static ssize_t hw_show_registers(struct device *dev, return size; } -static DEVICE_ATTR(registers, S_IRUGO, hw_show_registers, NULL); +static DEVICE_ATTR(registers, S_IRUGO, mtip_hw_show_registers, NULL); /* * Create the sysfs related attributes. @@ -2386,10 +2442,12 @@ static int mtip_ftl_rebuild_poll(struct driver_data *dd) "FTL rebuild in progress. Polling for completion.\n"); start = jiffies; - dd->ftlrebuildflag = 1; timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS); do { + if (unlikely(test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, + &dd->dd_flag))) + return -EFAULT; if (mtip_check_surprise_removal(dd->pdev)) return -EFAULT; @@ -2410,22 +2468,17 @@ static int mtip_ftl_rebuild_poll(struct driver_data *dd) dev_warn(&dd->pdev->dev, "FTL rebuild complete (%d secs).\n", jiffies_to_msecs(jiffies - start) / 1000); - dd->ftlrebuildflag = 0; mtip_block_initialize(dd); - break; + return 0; } ssleep(10); } while (time_before(jiffies, timeout)); /* Check for timeout */ - if (dd->ftlrebuildflag) { - dev_err(&dd->pdev->dev, + dev_err(&dd->pdev->dev, "Timed out waiting for FTL rebuild to complete (%d secs).\n", jiffies_to_msecs(jiffies - start) / 1000); - return -EFAULT; - } - - return 0; + return -EFAULT; } /* @@ -2456,6 +2509,9 @@ static int mtip_service_thread(void *data) if (kthread_should_stop()) break; + if (unlikely(test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, + &dd->dd_flag))) + break; set_bit(MTIP_FLAG_SVC_THD_ACTIVE_BIT, &port->flags); if (test_bit(MTIP_FLAG_ISSUE_CMDS_BIT, &port->flags)) { slot = 1; @@ -2515,6 +2571,7 @@ static int mtip_hw_init(struct driver_data *dd) int i; int rv; unsigned int num_command_slots; + unsigned long timeout, timetaken; dd->mmio = pcim_iomap_table(dd->pdev)[MTIP_ABAR]; @@ -2625,14 +2682,43 @@ static int mtip_hw_init(struct driver_data *dd) dd->port->mmio + i*0x80 + PORT_SDBV; } - /* Reset the HBA. */ - if (mtip_hba_reset(dd) < 0) { - dev_err(&dd->pdev->dev, - "Card did not reset within timeout\n"); - rv = -EIO; + timetaken = jiffies; + timeout = jiffies + msecs_to_jiffies(30000); + while (((readl(dd->port->mmio + PORT_SCR_STAT) & 0x0F) != 0x03) && + time_before(jiffies, timeout)) { + mdelay(100); + } + if (unlikely(mtip_check_surprise_removal(dd->pdev))) { + timetaken = jiffies - timetaken; + dev_warn(&dd->pdev->dev, + "Surprise removal detected at %u ms\n", + jiffies_to_msecs(timetaken)); + rv = -ENODEV; + goto out2 ; + } + if (unlikely(test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, &dd->dd_flag))) { + timetaken = jiffies - timetaken; + dev_warn(&dd->pdev->dev, + "Removal detected at %u ms\n", + jiffies_to_msecs(timetaken)); + rv = -EFAULT; goto out2; } + /* Conditionally reset the HBA. */ + if (!(readl(dd->mmio + HOST_CAP) & HOST_CAP_NZDMA)) { + if (mtip_hba_reset(dd) < 0) { + dev_err(&dd->pdev->dev, + "Card did not reset within timeout\n"); + rv = -EIO; + goto out2; + } + } else { + /* Clear any pending interrupts on the HBA */ + writel(readl(dd->mmio + HOST_IRQ_STAT), + dd->mmio + HOST_IRQ_STAT); + } + mtip_init_port(dd->port); mtip_start_port(dd->port); @@ -2662,6 +2748,12 @@ static int mtip_hw_init(struct driver_data *dd) mod_timer(&dd->port->cmd_timer, jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD)); + + if (test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, &dd->dd_flag)) { + rv = -EFAULT; + goto out3; + } + if (mtip_get_identify(dd->port, NULL) < 0) { rv = -EFAULT; goto out3; @@ -2714,9 +2806,12 @@ static int mtip_hw_exit(struct driver_data *dd) * Send standby immediate (E0h) to the drive so that it * saves its state. */ - if (atomic_read(&dd->drv_cleanup_done) != true) { + if (!test_bit(MTIP_DD_FLAG_CLEANUP_BIT, &dd->dd_flag)) { - mtip_standby_immediate(dd->port); + if (test_bit(MTIP_FLAG_REBUILD_BIT, &dd->dd_flag)) + if (mtip_standby_immediate(dd->port)) + dev_warn(&dd->pdev->dev, + "STANDBY IMMEDIATE failed\n"); /* de-initialize the port. */ mtip_deinit_port(dd->port); @@ -2894,6 +2989,9 @@ static int mtip_block_ioctl(struct block_device *dev, if (!dd) return -ENOTTY; + if (unlikely(test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, &dd->dd_flag))) + return -ENOTTY; + switch (cmd) { case BLKFLSBUF: return -ENOTTY; @@ -2929,6 +3027,9 @@ static int mtip_block_compat_ioctl(struct block_device *dev, if (!dd) return -ENOTTY; + if (unlikely(test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, &dd->dd_flag))) + return -ENOTTY; + switch (cmd) { case BLKFLSBUF: return -ENOTTY; @@ -3051,6 +3152,11 @@ static void mtip_make_request(struct request_queue *queue, struct bio *bio) int nents = 0; int tag = 0; + if (test_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, &dd->dd_flag)) { + bio_endio(bio, -ENXIO); + return; + } + if (unlikely(!bio_has_data(bio))) { blk_queue_flush(queue, 0); bio_endio(bio, 0); @@ -3063,7 +3169,7 @@ static void mtip_make_request(struct request_queue *queue, struct bio *bio) if (unlikely((bio)->bi_vcnt > MTIP_MAX_SG)) { dev_warn(&dd->pdev->dev, - "Maximum number of SGL entries exceeded"); + "Maximum number of SGL entries exceeded\n"); bio_io_error(bio); mtip_hw_release_scatterlist(dd, tag); return; @@ -3212,8 +3318,10 @@ skip_create_disk: kobject_put(kobj); } - if (dd->mtip_svc_handler) + if (dd->mtip_svc_handler) { + set_bit(MTIP_DD_FLAG_INIT_DONE_BIT, &dd->dd_flag); return rv; /* service thread created for handling rebuild */ + } start_service_thread: sprintf(thd_name, "mtip_svc_thd_%02d", index); @@ -3228,6 +3336,9 @@ start_service_thread: goto kthread_run_error; } + if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC) + rv = wait_for_rebuild; + return rv; kthread_run_error: @@ -3274,10 +3385,12 @@ static int mtip_block_remove(struct driver_data *dd) } /* Clean up the sysfs attributes managed by the protocol layer. */ - kobj = kobject_get(&disk_to_dev(dd->disk)->kobj); - if (kobj) { - mtip_hw_sysfs_exit(dd, kobj); - kobject_put(kobj); + if (test_bit(MTIP_DD_FLAG_INIT_DONE_BIT, &dd->dd_flag)) { + kobj = kobject_get(&disk_to_dev(dd->disk)->kobj); + if (kobj) { + mtip_hw_sysfs_exit(dd, kobj); + kobject_put(kobj); + } } /* @@ -3361,8 +3474,6 @@ static int mtip_pci_probe(struct pci_dev *pdev, return -ENOMEM; } - atomic_set(&dd->resumeflag, false); - /* Attach the private data to this PCI device. */ pci_set_drvdata(pdev, dd); @@ -3419,7 +3530,8 @@ static int mtip_pci_probe(struct pci_dev *pdev, * instance number. */ instance++; - + if (rv != MTIP_FTL_REBUILD_MAGIC) + set_bit(MTIP_DD_FLAG_INIT_DONE_BIT, &dd->dd_flag); goto done; block_initialize_err: @@ -3433,9 +3545,6 @@ iomap_err: pci_set_drvdata(pdev, NULL); return rv; done: - /* Set the atomic variable as 0 */ - atomic_set(&dd->drv_cleanup_done, false); - return rv; } @@ -3451,8 +3560,10 @@ static void mtip_pci_remove(struct pci_dev *pdev) struct driver_data *dd = pci_get_drvdata(pdev); int counter = 0; + set_bit(MTIP_DD_FLAG_REMOVE_PENDING_BIT, &dd->dd_flag); + if (mtip_check_surprise_removal(pdev)) { - while (atomic_read(&dd->drv_cleanup_done) == false) { + while (!test_bit(MTIP_DD_FLAG_CLEANUP_BIT, &dd->dd_flag)) { counter++; msleep(20); if (counter == 10) { @@ -3490,7 +3601,7 @@ static int mtip_pci_suspend(struct pci_dev *pdev, pm_message_t mesg) return -EFAULT; } - atomic_set(&dd->resumeflag, true); + set_bit(MTIP_DD_FLAG_RESUME_BIT, &dd->dd_flag); /* Disable ports & interrupts then send standby immediate */ rv = mtip_block_suspend(dd); @@ -3556,7 +3667,7 @@ static int mtip_pci_resume(struct pci_dev *pdev) dev_err(&pdev->dev, "Unable to resume\n"); err: - atomic_set(&dd->resumeflag, false); + clear_bit(MTIP_DD_FLAG_RESUME_BIT, &dd->dd_flag); return rv; } diff --git a/drivers/block/mtip32xx/mtip32xx.h b/drivers/block/mtip32xx/mtip32xx.h index e0554a8f2233..f4e46cc81d55 100644 --- a/drivers/block/mtip32xx/mtip32xx.h +++ b/drivers/block/mtip32xx/mtip32xx.h @@ -121,6 +121,12 @@ #define MTIP_FLAG_REBUILD_BIT 5 #define MTIP_FLAG_SVC_THD_SHOULD_STOP_BIT 8 +/* below are bit numbers in 'dd_flag' defined in driver_data */ +#define MTIP_DD_FLAG_REMOVE_PENDING_BIT 1 +#define MTIP_DD_FLAG_RESUME_BIT 2 +#define MTIP_DD_FLAG_CLEANUP_BIT 3 +#define MTIP_DD_FLAG_INIT_DONE_BIT 4 + /* Register Frame Information Structure (FIS), host to device. */ struct host_to_dev_fis { /* @@ -404,13 +410,9 @@ struct driver_data { unsigned slot_groups; /* number of slot groups the product supports */ - atomic_t drv_cleanup_done; /* Atomic variable for SRSI */ - unsigned long index; /* Index to determine the disk name */ - unsigned int ftlrebuildflag; /* FTL rebuild flag */ - - atomic_t resumeflag; /* Atomic variable to track suspend/resume */ + unsigned long dd_flag; /* NOTE: use atomic bit operations on this */ struct task_struct *mtip_svc_handler; /* task_struct of svc thd */ }; |