Merge branch 'master' into for-next

Fast-forward merge with Linus to be able to merge patches
based on more recent version of the tree.

8 files changed, 86 insertions, 36 deletions

diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
index 26072f1e9852..6981b773a88d 100644
--- a/drivers/scsi/isci/host.c
+++ b/drivers/scsi/isci/host.c
@@ -531,6 +531,9 @@ static void sci_controller_process_completions(struct isci_host *ihost)
 			break;
 
 		case SCU_COMPLETION_TYPE_EVENT:
+			sci_controller_event_completion(ihost, ent);
+			break;
+
 		case SCU_COMPLETION_TYPE_NOTIFY: {
 			event_cycle ^= ((event_get+1) & SCU_MAX_EVENTS) <<
 				       (SMU_COMPLETION_QUEUE_GET_EVENT_CYCLE_BIT_SHIFT - SCU_MAX_EVENTS_SHIFT);
@@ -1091,6 +1094,7 @@ static void isci_host_completion_routine(unsigned long data)
 	struct isci_request *request;
 	struct isci_request *next_request;
 	struct sas_task     *task;
+	u16 active;
 
 	INIT_LIST_HEAD(&completed_request_list);
 	INIT_LIST_HEAD(&errored_request_list);
@@ -1181,6 +1185,13 @@ static void isci_host_completion_routine(unsigned long data)
 		}
 	}
 
+	/* the coalesence timeout doubles at each encoding step, so
+	 * update it based on the ilog2 value of the outstanding requests
+	 */
+	active = isci_tci_active(ihost);
+	writel(SMU_ICC_GEN_VAL(NUMBER, active) |
+	       SMU_ICC_GEN_VAL(TIMER, ISCI_COALESCE_BASE + ilog2(active)),
+	       &ihost->smu_registers->interrupt_coalesce_control);
 }
 
 /**
@@ -1471,7 +1482,7 @@ static void sci_controller_ready_state_enter(struct sci_base_state_machine *sm)
 	struct isci_host *ihost = container_of(sm, typeof(*ihost), sm);
 
 	/* set the default interrupt coalescence number and timeout value. */
-	sci_controller_set_interrupt_coalescence(ihost, 0x10, 250);
+	sci_controller_set_interrupt_coalescence(ihost, 0, 0);
 }
 
 static void sci_controller_ready_state_exit(struct sci_base_state_machine *sm)
diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h
index 062101a39f79..9f33831a2f04 100644
--- a/drivers/scsi/isci/host.h
+++ b/drivers/scsi/isci/host.h
@@ -369,6 +369,9 @@ static inline struct isci_host *dev_to_ihost(struct domain_device *dev)
 #define ISCI_TAG_SEQ(tag) (((tag) >> 12) & (SCI_MAX_SEQ-1))
 #define ISCI_TAG_TCI(tag) ((tag) & (SCI_MAX_IO_REQUESTS-1))
 
+/* interrupt coalescing baseline: 9 == 3 to 5us interrupt delay per command */
+#define ISCI_COALESCE_BASE 9
+
 /* expander attached sata devices require 3 rnc slots */
 static inline int sci_remote_device_node_count(struct isci_remote_device *idev)
 {
diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c
index 61e0d09e2b57..29aa34efb0f5 100644
--- a/drivers/scsi/isci/init.c
+++ b/drivers/scsi/isci/init.c
@@ -59,10 +59,19 @@
 #include <linux/firmware.h>
 #include <linux/efi.h>
 #include <asm/string.h>
+#include <scsi/scsi_host.h>
 #include "isci.h"
 #include "task.h"
 #include "probe_roms.h"
 
+#define MAJ 1
+#define MIN 0
+#define BUILD 0
+#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
+	__stringify(BUILD)
+
+MODULE_VERSION(DRV_VERSION);
+
 static struct scsi_transport_template *isci_transport_template;
 
 static DEFINE_PCI_DEVICE_TABLE(isci_id_table) = {
@@ -113,6 +122,22 @@ unsigned char max_concurr_spinup = 1;
 module_param(max_concurr_spinup, byte, 0);
 MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup");
 
+static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev);
+	struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
+	struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id);
+}
+
+static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL);
+
+struct device_attribute *isci_host_attrs[] = {
+	&dev_attr_isci_id,
+	NULL
+};
+
 static struct scsi_host_template isci_sht = {
 
 	.module				= THIS_MODULE,
@@ -138,6 +163,7 @@ static struct scsi_host_template isci_sht = {
 	.slave_alloc			= sas_slave_alloc,
 	.target_destroy			= sas_target_destroy,
 	.ioctl				= sas_ioctl,
+	.shost_attrs			= isci_host_attrs,
 };
 
 static struct sas_domain_function_template isci_transport_ops  = {
@@ -232,17 +258,6 @@ static int isci_register_sas_ha(struct isci_host *isci_host)
 	return 0;
 }
 
-static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev);
-	struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
-	struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha);
-
-	return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id);
-}
-
-static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL);
-
 static void isci_unregister(struct isci_host *isci_host)
 {
 	struct Scsi_Host *shost;
@@ -251,7 +266,6 @@ static void isci_unregister(struct isci_host *isci_host)
 		return;
 
 	shost = isci_host->shost;
-	device_remove_file(&shost->shost_dev, &dev_attr_isci_id);
 
 	sas_unregister_ha(&isci_host->sas_ha);
 
@@ -415,14 +429,8 @@ static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
 	if (err)
 		goto err_shost_remove;
 
-	err = device_create_file(&shost->shost_dev, &dev_attr_isci_id);
-	if (err)
-		goto err_unregister_ha;
-
 	return isci_host;
 
- err_unregister_ha:
-	sas_unregister_ha(&(isci_host->sas_ha));
  err_shost_remove:
 	scsi_remove_host(shost);
  err_shost:
@@ -540,7 +548,8 @@ static __init int isci_init(void)
 {
 	int err;
 
-	pr_info("%s: Intel(R) C600 SAS Controller Driver\n", DRV_NAME);
+	pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n",
+		DRV_NAME, DRV_VERSION);
 
 	isci_transport_template = sas_domain_attach_transport(&isci_transport_ops);
 	if (!isci_transport_template)
diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c
index 8d9192d49f4a..09e61134037f 100644
--- a/drivers/scsi/isci/phy.c
+++ b/drivers/scsi/isci/phy.c
@@ -104,6 +104,7 @@ sci_phy_link_layer_initialization(struct isci_phy *iphy,
 	u32 parity_count = 0;
 	u32 llctl, link_rate;
 	u32 clksm_value = 0;
+	u32 sp_timeouts = 0;
 
 	iphy->link_layer_registers = reg;
 
@@ -211,6 +212,18 @@ sci_phy_link_layer_initialization(struct isci_phy *iphy,
 	llctl |= SCU_SAS_LLCTL_GEN_VAL(MAX_LINK_RATE, link_rate);
 	writel(llctl, &iphy->link_layer_registers->link_layer_control);
 
+	sp_timeouts = readl(&iphy->link_layer_registers->sas_phy_timeouts);
+
+	/* Clear the default 0x36 (54us) RATE_CHANGE timeout value. */
+	sp_timeouts &= ~SCU_SAS_PHYTOV_GEN_VAL(RATE_CHANGE, 0xFF);
+
+	/* Set RATE_CHANGE timeout value to 0x3B (59us).  This ensures SCU can
+	 * lock with 3Gb drive when SCU max rate is set to 1.5Gb.
+	 */
+	sp_timeouts |= SCU_SAS_PHYTOV_GEN_VAL(RATE_CHANGE, 0x3B);
+
+	writel(sp_timeouts, &iphy->link_layer_registers->sas_phy_timeouts);
+
 	if (is_a2(ihost->pdev)) {
 		/* Program the max ARB time for the PHY to 700us so we inter-operate with
 		 * the PMC expander which shuts down PHYs if the expander PHY generates too
diff --git a/drivers/scsi/isci/registers.h b/drivers/scsi/isci/registers.h
index 9b266c7428e8..00afc738bbed 100644
--- a/drivers/scsi/isci/registers.h
+++ b/drivers/scsi/isci/registers.h
@@ -1299,6 +1299,18 @@ struct scu_transport_layer_registers {
 #define SCU_AFE_XCVRCR_OFFSET       0x00DC
 #define SCU_AFE_LUTCR_OFFSET        0x00E0
 
+#define SCU_SAS_PHY_TIMER_TIMEOUT_VALUES_ALIGN_DETECTION_SHIFT          (0UL)
+#define SCU_SAS_PHY_TIMER_TIMEOUT_VALUES_ALIGN_DETECTION_MASK           (0x000000FFUL)
+#define SCU_SAS_PHY_TIMER_TIMEOUT_VALUES_HOT_PLUG_SHIFT                 (8UL)
+#define SCU_SAS_PHY_TIMER_TIMEOUT_VALUES_HOT_PLUG_MASK                  (0x0000FF00UL)
+#define SCU_SAS_PHY_TIMER_TIMEOUT_VALUES_COMSAS_DETECTION_SHIFT         (16UL)
+#define SCU_SAS_PHY_TIMER_TIMEOUT_VALUES_COMSAS_DETECTION_MASK          (0x00FF0000UL)
+#define SCU_SAS_PHY_TIMER_TIMEOUT_VALUES_RATE_CHANGE_SHIFT              (24UL)
+#define SCU_SAS_PHY_TIMER_TIMEOUT_VALUES_RATE_CHANGE_MASK               (0xFF000000UL)
+
+#define SCU_SAS_PHYTOV_GEN_VAL(name, value) \
+	SCU_GEN_VALUE(SCU_SAS_PHY_TIMER_TIMEOUT_VALUES_##name, value)
+
 #define SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_SHIFT                  (0)
 #define SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_MASK                   (0x00000003)
 #define SCU_SAS_LINK_LAYER_CONTROL_MAX_LINK_RATE_GEN1                   (0)
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index a46e07ac789f..b5d3a8c4d329 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -732,12 +732,20 @@ sci_io_request_terminate(struct isci_request *ireq)
 		sci_change_state(&ireq->sm, SCI_REQ_ABORTING);
 		return SCI_SUCCESS;
 	case SCI_REQ_TASK_WAIT_TC_RESP:
+		/* The task frame was already confirmed to have been
+		 * sent by the SCU HW.  Since the state machine is
+		 * now only waiting for the task response itself,
+		 * abort the request and complete it immediately
+		 * and don't wait for the task response.
+		 */
 		sci_change_state(&ireq->sm, SCI_REQ_ABORTING);
 		sci_change_state(&ireq->sm, SCI_REQ_COMPLETED);
 		return SCI_SUCCESS;
 	case SCI_REQ_ABORTING:
-		sci_change_state(&ireq->sm, SCI_REQ_COMPLETED);
-		return SCI_SUCCESS;
+		/* If a request has a termination requested twice, return
+		 * a failure indication, since HW confirmation of the first
+		 * abort is still outstanding.
+		 */
 	case SCI_REQ_COMPLETED:
 	default:
 		dev_warn(&ireq->owning_controller->pdev->dev,
@@ -2399,22 +2407,19 @@ static void isci_task_save_for_upper_layer_completion(
 	}
 }
 
-static void isci_request_process_stp_response(struct sas_task *task,
-					      void *response_buffer)
+static void isci_process_stp_response(struct sas_task *task, struct dev_to_host_fis *fis)
 {
-	struct dev_to_host_fis *d2h_reg_fis = response_buffer;
 	struct task_status_struct *ts = &task->task_status;
 	struct ata_task_resp *resp = (void *)&ts->buf[0];
 
-	resp->frame_len = le16_to_cpu(*(__le16 *)(response_buffer + 6));
-	memcpy(&resp->ending_fis[0], response_buffer + 16, 24);
+	resp->frame_len = sizeof(*fis);
+	memcpy(resp->ending_fis, fis, sizeof(*fis));
 	ts->buf_valid_size = sizeof(*resp);
 
-	/**
-	 * If the device fault bit is set in the status register, then
+	/* If the device fault bit is set in the status register, then
 	 * set the sense data and return.
 	 */
-	if (d2h_reg_fis->status & ATA_DF)
+	if (fis->status & ATA_DF)
 		ts->stat = SAS_PROTO_RESPONSE;
 	else
 		ts->stat = SAM_STAT_GOOD;
@@ -2428,7 +2433,6 @@ static void isci_request_io_request_complete(struct isci_host *ihost,
 {
 	struct sas_task *task = isci_request_access_task(request);
 	struct ssp_response_iu *resp_iu;
-	void *resp_buf;
 	unsigned long task_flags;
 	struct isci_remote_device *idev = isci_lookup_device(task->dev);
 	enum service_response response       = SAS_TASK_UNDELIVERED;
@@ -2565,9 +2569,7 @@ static void isci_request_io_request_complete(struct isci_host *ihost,
 				task);
 
 			if (sas_protocol_ata(task->task_proto)) {
-				resp_buf = &request->stp.rsp;
-				isci_request_process_stp_response(task,
-								  resp_buf);
+				isci_process_stp_response(task, &request->stp.rsp);
 			} else if (SAS_PROTOCOL_SSP == task->task_proto) {
 
 				/* crack the iu response buffer. */
diff --git a/drivers/scsi/isci/unsolicited_frame_control.c b/drivers/scsi/isci/unsolicited_frame_control.c
index e9e1e2abacb9..16f88ab939c8 100644
--- a/drivers/scsi/isci/unsolicited_frame_control.c
+++ b/drivers/scsi/isci/unsolicited_frame_control.c
@@ -72,7 +72,7 @@ int sci_unsolicited_frame_control_construct(struct isci_host *ihost)
 	 */
 	buf_len = SCU_MAX_UNSOLICITED_FRAMES * SCU_UNSOLICITED_FRAME_BUFFER_SIZE;
 	header_len = SCU_MAX_UNSOLICITED_FRAMES * sizeof(struct scu_unsolicited_frame_header);
-	size = buf_len + header_len + SCU_MAX_UNSOLICITED_FRAMES * sizeof(dma_addr_t);
+	size = buf_len + header_len + SCU_MAX_UNSOLICITED_FRAMES * sizeof(uf_control->address_table.array[0]);
 
 	/*
 	 * The Unsolicited Frame buffers are set at the start of the UF
diff --git a/drivers/scsi/isci/unsolicited_frame_control.h b/drivers/scsi/isci/unsolicited_frame_control.h
index 31cb9506f52d..75d896686f5a 100644
--- a/drivers/scsi/isci/unsolicited_frame_control.h
+++ b/drivers/scsi/isci/unsolicited_frame_control.h
@@ -214,7 +214,7 @@ struct sci_uf_address_table_array {
 	 * starting address of the UF address table.
 	 * 64-bit pointers are required by the hardware.
 	 */
-	dma_addr_t *array;
+	u64 *array;
 
 	/**
 	 * This field specifies the physical address location for the UF