scsi: megaraid_sas: Enable coalescing for high IOPS queues

Driver should enable interrupt coalescing (during driver load and after
Controller Reset) for High IOPS queues by masking appropriate bits in IOC
INIT frame.

Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Chandrakanth Patil <chandrakanth.patil@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index 5b17d0fa162bc3be4f702aecea1270e1857ff193..02e6e15d8c2ad9ac0fdf9d758b98f882c02995cf 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -1819,7 +1819,7 @@ struct megasas_init_frame {
        __le32 pad_0;           /*0Ch */
 
        __le16 flags;           /*10h */
-       __le16 reserved_3;              /*12h */
+       __le16 replyqueue_mask;         /*12h */
        __le32 data_xfer_len;   /*14h */
 
        __le32 queue_info_new_phys_addr_lo;     /*18h */

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 44bfbe8d2ce52d3e44240cbec9db60a7f82556f1..845ca2f94e5c5dc838caa416f9caa622e5d15134 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -1186,6 +1186,14 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
                cpu_to_le32(lower_32_bits(ioc_init_handle));
        init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST));
 
+       /*
+        * Each bit in replyqueue_mask represents one group of MSI-x vectors
+        * (each group has 8 vectors)
+        */
+       if (instance->balanced_mode)
+               init_frame->replyqueue_mask =
+                      cpu_to_le16(~(~0 << instance->low_latency_index_start / 8));
+
        req_desc.u.low = cpu_to_le32(lower_32_bits(cmd->frame_phys_addr));
        req_desc.u.high = cpu_to_le32(upper_32_bits(cmd->frame_phys_addr));
        req_desc.MFAIo.RequestFlags =