On 1/11/19 12:05 AM, Hannes Reinecke wrote:
> Fusion adapters can steer completions to individual queues, so
> we can enable blk-mq for those adapters.
> And in doing so we can rely on the interrupt affinity from the
> block layer and drop the hand-crafted 'reply_map' construct.
>
> Signed-off-by: Hannes Reinecke <hare@xxxxxxxx>
> ---
> drivers/scsi/megaraid/megaraid_sas.h | 1 -
> drivers/scsi/megaraid/megaraid_sas_base.c | 34 ++---------------------------
> drivers/scsi/megaraid/megaraid_sas_fusion.c | 8 +++----
> 3 files changed, 6 insertions(+), 37 deletions(-)
>
> diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
> index 16536c41f0c5..28ffcd5fcca2 100644
> --- a/drivers/scsi/megaraid/megaraid_sas.h
> +++ b/drivers/scsi/megaraid/megaraid_sas.h
> @@ -2166,7 +2166,6 @@ enum MR_PD_TYPE {
>
> struct megasas_instance {
>
> - unsigned int *reply_map;
> __le32 *producer;
> dma_addr_t producer_h;
> __le32 *consumer;
> diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
> index f7bdd783360a..d2612e6358ec 100644
> --- a/drivers/scsi/megaraid/megaraid_sas_base.c
> +++ b/drivers/scsi/megaraid/megaraid_sas_base.c
> @@ -5299,26 +5299,6 @@ megasas_setup_jbod_map(struct megasas_instance *instance)
> instance->use_seqnum_jbod_fp = false;
> }
>
> -static void megasas_setup_reply_map(struct megasas_instance *instance)
> -{
> - const struct cpumask *mask;
> - unsigned int queue, cpu;
> -
> - for (queue = 0; queue < instance->msix_vectors; queue++) {
> - mask = pci_irq_get_affinity(instance->pdev, queue);
> - if (!mask)
> - goto fallback;
> -
> - for_each_cpu(cpu, mask)
> - instance->reply_map[cpu] = queue;
> - }
> - return;
> -
> -fallback:
> - for_each_possible_cpu(cpu)
> - instance->reply_map[cpu] = cpu % instance->msix_vectors;
> -}
> -
> /**
> * megasas_init_fw - Initializes the FW
> * @instance: Adapter soft state
> @@ -5524,8 +5504,6 @@ static int megasas_init_fw(struct megasas_instance *instance)
> goto fail_init_adapter;
> }
>
> - megasas_setup_reply_map(instance);
> -
> dev_info(&instance->pdev->dev,
> "firmware supports msix\t: (%d)", fw_msix_count);
> dev_info(&instance->pdev->dev,
> @@ -6164,6 +6142,8 @@ static int megasas_io_attach(struct megasas_instance *instance)
> host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
> host->max_lun = MEGASAS_MAX_LUN;
> host->max_cmd_len = 16;
> + if (instance->adapter_type != MFI_SERIES && instance->msix_vectors > 0)
> + host->nr_hw_queues = instance->msix_vectors;
>
> /*
> * Notify the mid-layer about the new controller
> @@ -6331,11 +6311,6 @@ static inline int megasas_alloc_mfi_ctrl_mem(struct megasas_instance *instance)
> */
> static int megasas_alloc_ctrl_mem(struct megasas_instance *instance)
> {
> - instance->reply_map = kcalloc(nr_cpu_ids, sizeof(unsigned int),
> - GFP_KERNEL);
> - if (!instance->reply_map)
> - return -ENOMEM;
> -
> switch (instance->adapter_type) {
> case MFI_SERIES:
> if (megasas_alloc_mfi_ctrl_mem(instance))
> @@ -6352,8 +6327,6 @@ static int megasas_alloc_ctrl_mem(struct megasas_instance *instance)
>
> return 0;
> fail:
> - kfree(instance->reply_map);
> - instance->reply_map = NULL;
> return -ENOMEM;
> }
>
> @@ -6366,7 +6339,6 @@ static int megasas_alloc_ctrl_mem(struct megasas_instance *instance)
> */
> static inline void megasas_free_ctrl_mem(struct megasas_instance *instance)
> {
> - kfree(instance->reply_map);
> if (instance->adapter_type == MFI_SERIES) {
> if (instance->producer)
> dma_free_coherent(&instance->pdev->dev, sizeof(u32),
> @@ -6988,8 +6960,6 @@ megasas_resume(struct pci_dev *pdev)
> if (rval < 0)
> goto fail_reenable_msix;
>
> - megasas_setup_reply_map(instance);
> -
> if (instance->adapter_type != MFI_SERIES) {
> megasas_reset_reply_desc(instance);
> if (megasas_ioc_init_fusion(instance)) {
> diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
> index 211c17c33aa0..dd89fa4dd328 100644
> --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
> +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
> @@ -2629,6 +2629,7 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
> struct MR_PRIV_DEVICE *mrdev_priv;
> struct RAID_CONTEXT *rctx;
> struct RAID_CONTEXT_G35 *rctx_g35;
> + u32 tag = blk_mq_unique_tag(scp->request);
>
> device_id = MEGASAS_DEV_INDEX(scp);
>
> @@ -2724,8 +2725,7 @@ megasas_build_ldio_fusion(struct megasas_instance *instance,
> fp_possible = (io_info.fpOkForIo > 0) ? true : false;
> }
>
> - cmd->request_desc->SCSIIO.MSIxIndex =
> - instance->reply_map[raw_smp_processor_id()];
> + cmd->request_desc->SCSIIO.MSIxIndex = blk_mq_unique_tag_to_hwq(tag);
>
> if (instance->adapter_type >= VENTURA_SERIES) {
> /* FP for Optimal raid level 1.
> @@ -2971,6 +2971,7 @@ megasas_build_syspd_fusion(struct megasas_instance *instance,
> u16 pd_index = 0;
> u16 os_timeout_value;
> u16 timeout_limit;
> + u32 tag = blk_mq_unique_tag(scmd->request);
> struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
> struct RAID_CONTEXT *pRAID_Context;
> struct MR_PD_CFG_SEQ_NUM_SYNC *pd_sync;
> @@ -3038,8 +3039,7 @@ megasas_build_syspd_fusion(struct megasas_instance *instance,
>
> cmd->request_desc->SCSIIO.DevHandle = io_request->DevHandle;
>
> - cmd->request_desc->SCSIIO.MSIxIndex =
> - instance->reply_map[raw_smp_processor_id()];
> + cmd->request_desc->SCSIIO.MSIxIndex = blk_mq_unique_tag_to_hwq(tag);
>
> if (!fp_possible) {
> /* system pd firmware path */
>
Does what it says it'll do ...
Reviewed-by: Lee Duncan <lduncan@xxxxxxxx>
