1 files changed, 65 insertions, 143 deletions

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index dd12486ba520..a64fb5085882 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -72,6 +72,7 @@
 #include <linux/moduleparam.h>
 #include <linux/libata.h>
 #include <linux/hdreg.h>
+#include <linux/reboot.h>
 #include <linux/stringify.h>
 #include <asm/io.h>
 #include <asm/irq.h>
@@ -92,7 +93,6 @@ static unsigned int ipr_max_speed = 1;
 static int ipr_testmode = 0;
 static unsigned int ipr_fastfail = 0;
 static unsigned int ipr_transop_timeout = 0;
-static unsigned int ipr_enable_cache = 1;
 static unsigned int ipr_debug = 0;
 static unsigned int ipr_max_devs = IPR_DEFAULT_SIS64_DEVS;
 static unsigned int ipr_dual_ioa_raid = 1;
@@ -175,8 +175,6 @@ module_param_named(fastfail, ipr_fastfail, int, S_IRUGO | S_IWUSR);
 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_param_named(debug, ipr_debug, int, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(debug, "Enable device driver debugging logging. Set to 1 to enable. (default: 0)");
 module_param_named(dual_ioa_raid, ipr_dual_ioa_raid, int, 0);
@@ -3097,105 +3095,6 @@ 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
- * @dev:	device struct
- * @buf:	buffer
- *
- * Return value:
- *	number of bytes printed to buffer
- **/
-static ssize_t ipr_show_write_caching(struct device *dev,
-				      struct device_attribute *attr, char *buf)
-{
-	struct Scsi_Host *shost = class_to_shost(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
- * @dev:	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 device *dev,
-				       struct device_attribute *attr,
-				       const char *buf, size_t count)
-{
-	struct Scsi_Host *shost = class_to_shost(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 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
  * @dev:	class device struct
@@ -3797,7 +3696,6 @@ static struct device_attribute *ipr_ioa_attrs[] = {
 	&ipr_ioa_state_attr,
 	&ipr_ioa_reset_attr,
 	&ipr_update_fw_attr,
-	&ipr_ioa_cache_attr,
 	NULL,
 };
 
@@ -6293,36 +6191,6 @@ 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
@@ -6522,7 +6390,9 @@ 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_setup_write_cache;
+	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_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
 
 	LEAVE;
@@ -6590,10 +6460,13 @@ static int ipr_reset_cmd_failed(struct ipr_cmnd *ipr_cmd)
  **/
 static int ipr_reset_mode_sense_failed(struct ipr_cmnd *ipr_cmd)
 {
+	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
 	u32 ioasc = be32_to_cpu(ipr_cmd->ioasa.ioasc);
 
 	if (ioasc == IPR_IOASC_IR_INVALID_REQ_TYPE_OR_PKT) {
-		ipr_cmd->job_step = ipr_setup_write_cache;
+		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);
 		return IPR_RC_JOB_CONTINUE;
 	}
 
@@ -6944,13 +6817,9 @@ static int ipr_ioafp_cap_inquiry(struct ipr_cmnd *ipr_cmd)
 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_cap_inquiry;
 
 	ipr_ioafp_inquiry(ipr_cmd, 1, 3,
@@ -8209,10 +8078,6 @@ static void __devinit ipr_init_ioa_cfg(struct ipr_ioa_cfg *ioa_cfg,
 	init_waitqueue_head(&ioa_cfg->reset_wait_q);
 	init_waitqueue_head(&ioa_cfg->msi_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);
 	ioa_cfg->max_devs_supported = ipr_max_devs;
@@ -8842,6 +8707,61 @@ static struct pci_driver ipr_driver = {
 };
 
 /**
+ * ipr_halt_done - Shutdown prepare completion
+ *
+ * Return value:
+ * 	none
+ **/
+static void ipr_halt_done(struct ipr_cmnd *ipr_cmd)
+{
+	struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
+
+	list_add_tail(&ipr_cmd->queue, &ioa_cfg->free_q);
+}
+
+/**
+ * ipr_halt - Issue shutdown prepare to all adapters
+ *
+ * Return value:
+ * 	NOTIFY_OK on success / NOTIFY_DONE on failure
+ **/
+static int ipr_halt(struct notifier_block *nb, ulong event, void *buf)
+{
+	struct ipr_cmnd *ipr_cmd;
+	struct ipr_ioa_cfg *ioa_cfg;
+	unsigned long flags = 0;
+
+	if (event != SYS_RESTART && event != SYS_HALT && event != SYS_POWER_OFF)
+		return NOTIFY_DONE;
+
+	spin_lock(&ipr_driver_lock);
+
+	list_for_each_entry(ioa_cfg, &ipr_ioa_head, queue) {
+		spin_lock_irqsave(ioa_cfg->host->host_lock, flags);
+		if (!ioa_cfg->allow_cmds) {
+			spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
+			continue;
+		}
+
+		ipr_cmd = ipr_get_free_ipr_cmnd(ioa_cfg);
+		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_halt_done, ipr_timeout, IPR_DEVICE_RESET_TIMEOUT);
+		spin_unlock_irqrestore(ioa_cfg->host->host_lock, flags);
+	}
+	spin_unlock(&ipr_driver_lock);
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block ipr_notifier = {
+	ipr_halt, NULL, 0
+};
+
+/**
  * ipr_init - Module entry point
  *
  * Return value:
@@ -8852,6 +8772,7 @@ static int __init ipr_init(void)
 	ipr_info("IBM Power RAID SCSI Device Driver version: %s %s\n",
 		 IPR_DRIVER_VERSION, IPR_DRIVER_DATE);
 
+	register_reboot_notifier(&ipr_notifier);
 	return pci_register_driver(&ipr_driver);
 }
 
@@ -8865,6 +8786,7 @@ static int __init ipr_init(void)
  **/
 static void __exit ipr_exit(void)
 {
+	unregister_reboot_notifier(&ipr_notifier);
 	pci_unregister_driver(&ipr_driver);
 }