From ae09a6c1fd421887fa4885adb7c55ccc8074c441 Mon Sep 17 00:00:00 2001 From: "Sumit.Saxena@avagotech.com" Date: Mon, 5 Jan 2015 20:06:23 +0530 Subject: [PATCH] megaraid_sas: reserve commands for IOCTLs and internal DCMDs 1) For fusion adapters, limit reserved frames for non SCSI commands to 8 (3 for parallel IOCTLs + 5 for driver's internal DCMDs). Earlier reserved commands for non SCSI IO frames was set to 32, so with this implementation, increased per controller "can_queue". Behavior of MFI controllers will remain unchanged. 2) Optimize the code related to per controller's 'can_queue' setting. Signed-off-by: Sumit Saxena Signed-off-by: Chaitra Basappa Reviewed-by: Martin K. Petersen Signed-off-by: Christoph Hellwig --- drivers/scsi/megaraid/megaraid_sas.h | 7 ++- drivers/scsi/megaraid/megaraid_sas_base.c | 69 +++++++++++---------- drivers/scsi/megaraid/megaraid_sas_fusion.c | 8 ++- 3 files changed, 45 insertions(+), 39 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index b8b378dec7ec..793b2b3552ff 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -1082,6 +1082,8 @@ enum MR_SCSI_CMD_TYPE { */ #define MEGASAS_INT_CMDS 32 #define MEGASAS_SKINNY_INT_CMDS 5 +#define MEGASAS_FUSION_INTERNAL_CMDS 5 +#define MEGASAS_FUSION_IOCTL_CMDS 3 #define MEGASAS_MAX_MSIX_QUEUES 128 /* @@ -1687,9 +1689,8 @@ struct megasas_instance { u16 max_num_sge; u16 max_fw_cmds; - /* For Fusion its num IOCTL cmds, for others MFI based its - max_fw_cmds */ u16 max_mfi_cmds; + u16 max_scsi_cmds; u32 max_sectors_per_req; struct megasas_aen_event *ev; @@ -1765,7 +1766,7 @@ struct megasas_instance { u8 requestorId; char PlasmaFW111; char mpio; - int throttlequeuedepth; + u16 throttlequeuedepth; u8 mask_interrupts; u8 is_imr; }; diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index d4e9c4e1bf58..bf31dde554ce 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -78,7 +78,7 @@ static int allow_vf_ioctls; module_param(allow_vf_ioctls, int, S_IRUGO); MODULE_PARM_DESC(allow_vf_ioctls, "Allow ioctls in SR-IOV VF mode. Default: 0"); -static int throttlequeuedepth = MEGASAS_THROTTLE_QUEUE_DEPTH; +static unsigned int throttlequeuedepth = MEGASAS_THROTTLE_QUEUE_DEPTH; module_param(throttlequeuedepth, int, S_IRUGO); MODULE_PARM_DESC(throttlequeuedepth, "Adapter queue depth when throttled due to I/O timeout. Default: 16"); @@ -1764,6 +1764,7 @@ void megasas_check_and_restore_queue_depth(struct megasas_instance *instance) { unsigned long flags; + if (instance->flag & MEGASAS_FW_BUSY && time_after(jiffies, instance->last_time + 5 * HZ) && atomic_read(&instance->fw_outstanding) < @@ -1771,13 +1772,8 @@ megasas_check_and_restore_queue_depth(struct megasas_instance *instance) spin_lock_irqsave(instance->host->host_lock, flags); instance->flag &= ~MEGASAS_FW_BUSY; - if (instance->is_imr) { - instance->host->can_queue = - instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS; - } else - instance->host->can_queue = - instance->max_fw_cmds - MEGASAS_INT_CMDS; + instance->host->can_queue = instance->max_scsi_cmds; spin_unlock_irqrestore(instance->host->host_lock, flags); } } @@ -4685,23 +4681,38 @@ static int megasas_init_fw(struct megasas_instance *instance) if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors)) instance->max_sectors_per_req = tmp_sectors; - /* Check for valid throttlequeuedepth module parameter */ - if (instance->is_imr) { - if (throttlequeuedepth > (instance->max_fw_cmds - - MEGASAS_SKINNY_INT_CMDS)) - instance->throttlequeuedepth = - MEGASAS_THROTTLE_QUEUE_DEPTH; - else - instance->throttlequeuedepth = throttlequeuedepth; + /* + * 1. For fusion adapters, 3 commands for IOCTL and 5 commands + * for driver's internal DCMDs. + * 2. For MFI skinny adapters, 5 commands for IOCTL + driver's + * internal DCMDs. + * 3. For rest of MFI adapters, 27 commands reserved for IOCTLs + * and 5 commands for drivers's internal DCMD. + */ + if (instance->ctrl_context) { + instance->max_scsi_cmds = instance->max_fw_cmds - + (MEGASAS_FUSION_INTERNAL_CMDS + + MEGASAS_FUSION_IOCTL_CMDS); + sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS); + } else if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) || + (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) { + instance->max_scsi_cmds = instance->max_fw_cmds - + MEGASAS_SKINNY_INT_CMDS; + sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS); } else { - if (throttlequeuedepth > (instance->max_fw_cmds - - MEGASAS_INT_CMDS)) - instance->throttlequeuedepth = - MEGASAS_THROTTLE_QUEUE_DEPTH; - else - instance->throttlequeuedepth = throttlequeuedepth; + instance->max_scsi_cmds = instance->max_fw_cmds - + MEGASAS_INT_CMDS; + sema_init(&instance->ioctl_sem, (MEGASAS_INT_CMDS - 5)); } + /* Check for valid throttlequeuedepth module parameter */ + if (throttlequeuedepth && + throttlequeuedepth <= instance->max_scsi_cmds) + instance->throttlequeuedepth = throttlequeuedepth; + else + instance->throttlequeuedepth = + MEGASAS_THROTTLE_QUEUE_DEPTH; + /* * Setup tasklet for cmd completion */ @@ -4996,12 +5007,7 @@ static int megasas_io_attach(struct megasas_instance *instance) */ host->irq = instance->pdev->irq; host->unique_id = instance->unique_id; - if (instance->is_imr) { - host->can_queue = - instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS; - } else - host->can_queue = - instance->max_fw_cmds - MEGASAS_INT_CMDS; + host->can_queue = instance->max_scsi_cmds; host->this_id = instance->init_id; host->sg_tablesize = instance->max_num_sge; @@ -5264,12 +5270,10 @@ static int megasas_probe_one(struct pci_dev *pdev, instance->init_id = MEGASAS_DEFAULT_INIT_ID; instance->ctrl_info = NULL; + if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) || - (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) { + (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) instance->flag_ieee = 1; - sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS); - } else - sema_init(&instance->ioctl_sem, (MEGASAS_INT_CMDS - 5)); megasas_dbg_lvl = 0; instance->flag = 0; @@ -6264,9 +6268,6 @@ static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg) goto out_kfree_ioc; } - /* - * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds - */ if (down_interruptible(&instance->ioctl_sem)) { error = -ERESTARTSYS; goto out_kfree_ioc; diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index df280b1d263f..675b5e7aba94 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -1019,8 +1019,12 @@ megasas_init_adapter_fusion(struct megasas_instance *instance) * does not exceed max cmds that the FW can support */ instance->max_fw_cmds = instance->max_fw_cmds-1; - /* Only internal cmds (DCMD) need to have MFI frames */ - instance->max_mfi_cmds = MEGASAS_INT_CMDS; + + /* + * Only Driver's internal DCMDs and IOCTL DCMDs needs to have MFI frames + */ + instance->max_mfi_cmds = + MEGASAS_FUSION_INTERNAL_CMDS + MEGASAS_FUSION_IOCTL_CMDS; max_cmd = instance->max_fw_cmds; -- 2.39.5