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From bd2314e40123381058f15b3ae49616d1cccb4f44 Mon Sep 17 00:00:00 2001
From: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Date: Wed, 26 Oct 2016 13:34:38 +0530
Subject: [PATCH 07/11] scsi: mpt3sas: Increased/Additional MSIX support for
 SAS35 devices.

For SAS35 devices MSIX vectors are inceased to 128 from 96. To support this
Reply post host index register count is increased to 16. Also variable
msix96_vector is replaced with combined_reply_queue and variable
combined_reply_index_count is added to set different values for SAS3 and
SAS35 devices.

Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Sathya Prakash <sathya.prakash@broadcom.com>
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/mpt3sas/mpt3sas_base.c  | 14 +++++++-------
 drivers/scsi/mpt3sas/mpt3sas_base.h  |  8 +++++---
 drivers/scsi/mpt3sas/mpt3sas_scsih.c | 11 +++++++++--
 3 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index ac87e12..b26fa23 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -1079,7 +1079,7 @@ _base_interrupt(int irq, void *bus_id)
 	 * new reply host index value in ReplyPostIndex Field and msix_index
 	 * value in MSIxIndex field.
 	 */
-	if (ioc->msix96_vector)
+	if (ioc->combined_reply_queue)
 		writel(reply_q->reply_post_host_index | ((msix_index  & 7) <<
 			MPI2_RPHI_MSIX_INDEX_SHIFT),
 			ioc->replyPostRegisterIndex[msix_index/8]);
@@ -2053,7 +2053,7 @@ mpt3sas_base_unmap_resources(struct MPT3SAS_ADAPTER *ioc)
 	_base_free_irq(ioc);
 	_base_disable_msix(ioc);
 
-	if (ioc->msix96_vector) {
+	if (ioc->combined_reply_queue) {
 		kfree(ioc->replyPostRegisterIndex);
 		ioc->replyPostRegisterIndex = NULL;
 	}
@@ -2163,7 +2163,7 @@ mpt3sas_base_map_resources(struct MPT3SAS_ADAPTER *ioc)
 	/* Use the Combined reply queue feature only for SAS3 C0 & higher
 	 * revision HBAs and also only when reply queue count is greater than 8
 	 */
-	if (ioc->msix96_vector && ioc->reply_queue_count > 8) {
+	if (ioc->combined_reply_queue && ioc->reply_queue_count > 8) {
 		/* Determine the Supplemental Reply Post Host Index Registers
 		 * Addresse. Supplemental Reply Post Host Index Registers
 		 * starts at offset MPI25_SUP_REPLY_POST_HOST_INDEX_OFFSET and
@@ -2171,7 +2171,7 @@ mpt3sas_base_map_resources(struct MPT3SAS_ADAPTER *ioc)
 		 * MPT3_SUP_REPLY_POST_HOST_INDEX_REG_OFFSET from previous one.
 		 */
 		ioc->replyPostRegisterIndex = kcalloc(
-		     MPT3_SUP_REPLY_POST_HOST_INDEX_REG_COUNT,
+		     ioc->combined_reply_index_count,
 		     sizeof(resource_size_t *), GFP_KERNEL);
 		if (!ioc->replyPostRegisterIndex) {
 			dfailprintk(ioc, printk(MPT3SAS_FMT
@@ -2181,14 +2181,14 @@ mpt3sas_base_map_resources(struct MPT3SAS_ADAPTER *ioc)
 			goto out_fail;
 		}
 
-		for (i = 0; i < MPT3_SUP_REPLY_POST_HOST_INDEX_REG_COUNT; i++) {
+		for (i = 0; i < ioc->combined_reply_index_count; i++) {
 			ioc->replyPostRegisterIndex[i] = (resource_size_t *)
 			     ((u8 *)&ioc->chip->Doorbell +
 			     MPI25_SUP_REPLY_POST_HOST_INDEX_OFFSET +
 			     (i * MPT3_SUP_REPLY_POST_HOST_INDEX_REG_OFFSET));
 		}
 	} else
-		ioc->msix96_vector = 0;
+		ioc->combined_reply_queue = 0;
 
 	list_for_each_entry(reply_q, &ioc->reply_queue_list, list)
 		pr_info(MPT3SAS_FMT "%s: IRQ %d\n",
@@ -5161,7 +5161,7 @@ _base_make_ioc_operational(struct MPT3SAS_ADAPTER *ioc, int sleep_flag)
 
 	/* initialize reply post host index */
 	list_for_each_entry(reply_q, &ioc->reply_queue_list, list) {
-		if (ioc->msix96_vector)
+		if (ioc->combined_reply_queue)
 			writel((reply_q->msix_index & 7)<<
 			   MPI2_RPHI_MSIX_INDEX_SHIFT,
 			   ioc->replyPostRegisterIndex[reply_q->msix_index/8]);
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h
index c3a39e8..240c360 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.h
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.h
@@ -304,8 +304,9 @@
  * There are twelve Supplemental Reply Post Host Index Registers
  * and each register is at offset 0x10 bytes from the previous one.
  */
-#define MPT3_SUP_REPLY_POST_HOST_INDEX_REG_COUNT 12
-#define MPT3_SUP_REPLY_POST_HOST_INDEX_REG_OFFSET (0x10)
+#define MPT3_SUP_REPLY_POST_HOST_INDEX_REG_COUNT_G3	12
+#define MPT3_SUP_REPLY_POST_HOST_INDEX_REG_COUNT_G35	16
+#define MPT3_SUP_REPLY_POST_HOST_INDEX_REG_OFFSET	(0x10)
 
 /* OEM Identifiers */
 #define MFG10_OEM_ID_INVALID                   (0x00000000)
@@ -1172,7 +1173,8 @@ struct MPT3SAS_ADAPTER {
 	u8		reply_queue_count;
 	struct list_head reply_queue_list;
 
-	u8		msix96_vector;
+	u8		combined_reply_queue;
+	u8		combined_reply_index_count;
 	/* reply post register index */
 	resource_size_t	**replyPostRegisterIndex;
 
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index eaef45c..980c69d 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -8797,8 +8797,15 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		}
 		if ((ioc->hba_mpi_version_belonged == MPI25_VERSION &&
 			pdev->revision >= SAS3_PCI_DEVICE_C0_REVISION) ||
-			(ioc->hba_mpi_version_belonged == MPI26_VERSION))
-			ioc->msix96_vector = 1;
+			(ioc->hba_mpi_version_belonged == MPI26_VERSION)) {
+			ioc->combined_reply_queue = 1;
+			if (ioc->is_gen35_ioc)
+				ioc->combined_reply_index_count =
+				 MPT3_SUP_REPLY_POST_HOST_INDEX_REG_COUNT_G35;
+			else
+				ioc->combined_reply_index_count =
+				 MPT3_SUP_REPLY_POST_HOST_INDEX_REG_COUNT_G3;
+		}
 		break;
 	default:
 		return -ENODEV;
-- 
1.8.3.1