diff options
| -rw-r--r-- | drivers/scsi/ipr.c | 201 | ||||
| -rw-r--r-- | drivers/scsi/ipr.h | 18 |
2 files changed, 210 insertions, 9 deletions
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index 8817ea06adbf..7149aada3f3c 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -91,6 +91,7 @@ static unsigned int ipr_max_speed = 1; static int ipr_testmode = 0; static unsigned int ipr_fastfail = 0; static unsigned int ipr_transop_timeout = IPR_OPERATIONAL_TIMEOUT; +static unsigned int ipr_enable_cache = 1; static DEFINE_SPINLOCK(ipr_driver_lock); /* This table describes the differences between DMA controller chips */ @@ -150,6 +151,8 @@ module_param_named(fastfail, ipr_fastfail, int, 0); MODULE_PARM_DESC(fastfail, "Reduce timeouts and retries"); module_param_named(transop_timeout, ipr_transop_timeout, int, 0); MODULE_PARM_DESC(transop_timeout, "Time in seconds to wait for adapter to come operational (default: 300)"); +module_param_named(enable_cache, ipr_enable_cache, int, 0); +MODULE_PARM_DESC(enable_cache, "Enable adapter's non-volatile write cache (default: 1)"); MODULE_LICENSE("GPL"); MODULE_VERSION(IPR_DRIVER_VERSION); @@ -1937,6 +1940,103 @@ static struct bin_attribute ipr_trace_attr = { }; #endif +static const struct { + enum ipr_cache_state state; + char *name; +} cache_state [] = { + { CACHE_NONE, "none" }, + { CACHE_DISABLED, "disabled" }, + { CACHE_ENABLED, "enabled" } +}; + +/** + * ipr_show_write_caching - Show the write caching attribute + * @class_dev: class device struct + * @buf: buffer + * + * Return value: + * number of bytes printed to buffer + **/ +static ssize_t ipr_show_write_caching(struct class_device *class_dev, char *buf) +{ + struct Scsi_Host *shost = class_to_shost(class_dev); + struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata; + unsigned long lock_flags = 0; + int i, len = 0; + + spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags); + for (i = 0; i < ARRAY_SIZE(cache_state); i++) { + if (cache_state[i].state == ioa_cfg->cache_state) { + len = snprintf(buf, PAGE_SIZE, "%s\n", cache_state[i].name); + break; + } + } + spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags); + return len; +} + + +/** + * ipr_store_write_caching - Enable/disable adapter write cache + * @class_dev: class_device struct + * @buf: buffer + * @count: buffer size + * + * This function will enable/disable adapter write cache. + * + * Return value: + * count on success / other on failure + **/ +static ssize_t ipr_store_write_caching(struct class_device *class_dev, + const char *buf, size_t count) +{ + struct Scsi_Host *shost = class_to_shost(class_dev); + struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata; + unsigned long lock_flags = 0; + enum ipr_cache_state new_state = CACHE_INVALID; + int i; + + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + if (ioa_cfg->cache_state == CACHE_NONE) + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(cache_state); i++) { + if (!strncmp(cache_state[i].name, buf, strlen(cache_state[i].name))) { + new_state = cache_state[i].state; + break; + } + } + + if (new_state != CACHE_DISABLED && new_state != CACHE_ENABLED) + return -EINVAL; + + spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags); + if (ioa_cfg->cache_state == new_state) { + spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags); + return count; + } + + ioa_cfg->cache_state = new_state; + dev_info(&ioa_cfg->pdev->dev, "%s adapter write cache.\n", + new_state == CACHE_ENABLED ? "Enabling" : "Disabling"); + if (!ioa_cfg->in_reset_reload) + ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL); + spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags); + wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload); + + return count; +} + +static struct class_device_attribute ipr_ioa_cache_attr = { + .attr = { + .name = "write_cache", + .mode = S_IRUGO | S_IWUSR, + }, + .show = ipr_show_write_caching, + .store = ipr_store_write_caching +}; + /** * ipr_show_fw_version - Show the firmware version * @class_dev: class device struct @@ -2406,6 +2506,7 @@ static struct class_device_attribute *ipr_ioa_attrs[] = { &ipr_diagnostics_attr, &ipr_ioa_reset_attr, &ipr_update_fw_attr, + &ipr_ioa_cache_attr, NULL, }; @@ -4148,6 +4249,36 @@ static int ipr_set_supported_devs(struct ipr_cmnd *ipr_cmd) } /** + * ipr_setup_write_cache - Disable write cache if needed + * @ipr_cmd: ipr command struct + * + * This function sets up adapters write cache to desired setting + * + * Return value: + * IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN + **/ +static int ipr_setup_write_cache(struct ipr_cmnd *ipr_cmd) +{ + struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg; + + ipr_cmd->job_step = ipr_set_supported_devs; + ipr_cmd->u.res = list_entry(ioa_cfg->used_res_q.next, + struct ipr_resource_entry, queue); + + if (ioa_cfg->cache_state != CACHE_DISABLED) + return IPR_RC_JOB_CONTINUE; + + ipr_cmd->ioarcb.res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE); + ipr_cmd->ioarcb.cmd_pkt.request_type = IPR_RQTYPE_IOACMD; + ipr_cmd->ioarcb.cmd_pkt.cdb[0] = IPR_IOA_SHUTDOWN; + ipr_cmd->ioarcb.cmd_pkt.cdb[1] = IPR_SHUTDOWN_PREPARE_FOR_NORMAL; + + ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT); + + return IPR_RC_JOB_RETURN; +} + +/** * ipr_get_mode_page - Locate specified mode page * @mode_pages: mode page buffer * @page_code: page code to find @@ -4358,10 +4489,7 @@ static int ipr_ioafp_mode_select_page28(struct ipr_cmnd *ipr_cmd) ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, mode_pages), length); - ipr_cmd->job_step = ipr_set_supported_devs; - ipr_cmd->u.res = list_entry(ioa_cfg->used_res_q.next, - struct ipr_resource_entry, queue); - + ipr_cmd->job_step = ipr_setup_write_cache; ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT); LEAVE; @@ -4581,6 +4709,27 @@ static void ipr_ioafp_inquiry(struct ipr_cmnd *ipr_cmd, u8 flags, u8 page, } /** + * ipr_inquiry_page_supported - Is the given inquiry page supported + * @page0: inquiry page 0 buffer + * @page: page code. + * + * This function determines if the specified inquiry page is supported. + * + * Return value: + * 1 if page is supported / 0 if not + **/ +static int ipr_inquiry_page_supported(struct ipr_inquiry_page0 *page0, u8 page) +{ + int i; + + for (i = 0; i < min_t(u8, page0->len, IPR_INQUIRY_PAGE0_ENTRIES); i++) + if (page0->page[i] == page) + return 1; + + return 0; +} + +/** * ipr_ioafp_page3_inquiry - Send a Page 3 Inquiry to the adapter. * @ipr_cmd: ipr command struct * @@ -4593,6 +4742,36 @@ static void ipr_ioafp_inquiry(struct ipr_cmnd *ipr_cmd, u8 flags, u8 page, static int ipr_ioafp_page3_inquiry(struct ipr_cmnd *ipr_cmd) { struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg; + struct ipr_inquiry_page0 *page0 = &ioa_cfg->vpd_cbs->page0_data; + + ENTER; + + if (!ipr_inquiry_page_supported(page0, 1)) + ioa_cfg->cache_state = CACHE_NONE; + + ipr_cmd->job_step = ipr_ioafp_query_ioa_cfg; + + ipr_ioafp_inquiry(ipr_cmd, 1, 3, + ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page3_data), + sizeof(struct ipr_inquiry_page3)); + + LEAVE; + return IPR_RC_JOB_RETURN; +} + +/** + * ipr_ioafp_page0_inquiry - Send a Page 0 Inquiry to the adapter. + * @ipr_cmd: ipr command struct + * + * This function sends a Page 0 inquiry to the adapter + * to retrieve supported inquiry pages. + * + * Return value: + * IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN + **/ +static int ipr_ioafp_page0_inquiry(struct ipr_cmnd *ipr_cmd) +{ + struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg; char type[5]; ENTER; @@ -4602,11 +4781,11 @@ static int ipr_ioafp_page3_inquiry(struct ipr_cmnd *ipr_cmd) type[4] = '\0'; ioa_cfg->type = simple_strtoul((char *)type, NULL, 16); - ipr_cmd->job_step = ipr_ioafp_query_ioa_cfg; + ipr_cmd->job_step = ipr_ioafp_page3_inquiry; - ipr_ioafp_inquiry(ipr_cmd, 1, 3, - ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page3_data), - sizeof(struct ipr_inquiry_page3)); + ipr_ioafp_inquiry(ipr_cmd, 1, 0, + ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page0_data), + sizeof(struct ipr_inquiry_page0)); LEAVE; return IPR_RC_JOB_RETURN; @@ -4626,7 +4805,7 @@ static int ipr_ioafp_std_inquiry(struct ipr_cmnd *ipr_cmd) struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg; ENTER; - ipr_cmd->job_step = ipr_ioafp_page3_inquiry; + ipr_cmd->job_step = ipr_ioafp_page0_inquiry; ipr_ioafp_inquiry(ipr_cmd, 0, 0, ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, ioa_vpd), @@ -5629,6 +5808,10 @@ static void __devinit ipr_init_ioa_cfg(struct ipr_ioa_cfg *ioa_cfg, INIT_WORK(&ioa_cfg->work_q, ipr_worker_thread, ioa_cfg); init_waitqueue_head(&ioa_cfg->reset_wait_q); ioa_cfg->sdt_state = INACTIVE; + if (ipr_enable_cache) + ioa_cfg->cache_state = CACHE_ENABLED; + else + ioa_cfg->cache_state = CACHE_DISABLED; ipr_initialize_bus_attr(ioa_cfg); diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h index b8c1603f99eb..6d9aef001fe7 100644 --- a/drivers/scsi/ipr.h +++ b/drivers/scsi/ipr.h @@ -541,6 +541,15 @@ struct ipr_inquiry_page3 { u8 patch_number[4]; }__attribute__((packed)); +#define IPR_INQUIRY_PAGE0_ENTRIES 20 +struct ipr_inquiry_page0 { + u8 peri_qual_dev_type; + u8 page_code; + u8 reserved1; + u8 len; + u8 page[IPR_INQUIRY_PAGE0_ENTRIES]; +}__attribute__((packed)); + struct ipr_hostrcb_device_data_entry { struct ipr_vpd vpd; struct ipr_res_addr dev_res_addr; @@ -731,6 +740,7 @@ struct ipr_resource_table { struct ipr_misc_cbs { struct ipr_ioa_vpd ioa_vpd; + struct ipr_inquiry_page0 page0_data; struct ipr_inquiry_page3 page3_data; struct ipr_mode_pages mode_pages; struct ipr_supported_device supp_dev; @@ -813,6 +823,13 @@ enum ipr_sdt_state { DUMP_OBTAINED }; +enum ipr_cache_state { + CACHE_NONE, + CACHE_DISABLED, + CACHE_ENABLED, + CACHE_INVALID +}; + /* Per-controller data */ struct ipr_ioa_cfg { char eye_catcher[8]; @@ -829,6 +846,7 @@ struct ipr_ioa_cfg { u8 allow_cmds:1; u8 allow_ml_add_del:1; + enum ipr_cache_state cache_state; u16 type; /* CCIN of the card */ u8 log_level; |