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scsi: megaraid_sas: 32 bit descriptor fire cmd optimization

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No functional change. Code refactor.

megasas_fire_cmd_fusion can always use 32 bit descriptor write for
ventura. No need to pass extra flag.  Only IOC INIT required 64 bit
Descriptor write.

Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Shivasharan S 2017-02-10 00:59:04 -08:00 committed by Martin K. Petersen
parent 8bf7c65d37
commit 45b8a35eed
1 changed files with 33 additions and 32 deletions
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49
drivers/scsi/megaraid/megaraid_sas_fusion.c
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@ -188,33 +188,28 @@ inline void megasas_return_cmd_fusion(struct megasas_instance *instance,
/**
* megasas_fire_cmd_fusion - Sends command to the FW
* @instance: Adapter soft state
* @req_desc: 32bit or 64bit Request descriptor
*
* Perform PCI Write. Ventura supports 32 bit Descriptor.
* Prior to Ventura (12G) MR controller supports 64 bit Descriptor.
*/
static void
megasas_fire_cmd_fusion(struct megasas_instance *instance,
union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc, bool is_32bit)
union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc)
{
struct megasas_register_set __iomem *regs = instance->reg_set;
unsigned long flags;
if (is_32bit)
if (instance->is_ventura)
writel(le32_to_cpu(req_desc->u.low),
&(regs)->inbound_single_queue_port);
else if (instance->is_ventura) {
spin_lock_irqsave(&instance->hba_lock, flags);
writel(le32_to_cpu(req_desc->u.low),
&(regs)->inbound_low_queue_port);
writel(le32_to_cpu(req_desc->u.high),
&(regs)->inbound_high_queue_port);
mmiowb();
spin_unlock_irqrestore(&instance->hba_lock, flags);
} else {
&instance->reg_set->inbound_single_queue_port);
else {
#if defined(writeq) && defined(CONFIG_64BIT)
u64 req_data = (((u64)le32_to_cpu(req_desc->u.high) << 32) |
le32_to_cpu(req_desc->u.low));
writeq(req_data, &instance->reg_set->inbound_low_queue_port);
#else
unsigned long flags;
spin_lock_irqsave(&instance->hba_lock, flags);
writel(le32_to_cpu(req_desc->u.low),
&instance->reg_set->inbound_low_queue_port);
@ -771,6 +766,7 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
const char *sys_info;
MFI_CAPABILITIES *drv_ops;
u32 scratch_pad_2;
unsigned long flags;
fusion = instance->ctrl_context;
@ -897,7 +893,14 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
break;
}
megasas_fire_cmd_fusion(instance, &req_desc, false);
/* For Ventura also IOC INIT required 64 bit Descriptor write. */
spin_lock_irqsave(&instance->hba_lock, flags);
writel(le32_to_cpu(req_desc.u.low),
&instance->reg_set->inbound_low_queue_port);
writel(le32_to_cpu(req_desc.u.high),
&instance->reg_set->inbound_high_queue_port);
mmiowb();
spin_unlock_irqrestore(&instance->hba_lock, flags);
wait_and_poll(instance, cmd, MFI_POLL_TIMEOUT_SECS);
@ -2577,11 +2580,10 @@ megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
* Issue the command to the FW
*/
megasas_fire_cmd_fusion(instance, req_desc, instance->is_ventura);
megasas_fire_cmd_fusion(instance, req_desc);
if (r1_cmd)
megasas_fire_cmd_fusion(instance, r1_cmd->request_desc,
instance->is_ventura);
megasas_fire_cmd_fusion(instance, r1_cmd->request_desc);
return 0;
@ -3001,7 +3003,7 @@ megasas_issue_dcmd_fusion(struct megasas_instance *instance,
return DCMD_NOT_FIRED;
}
megasas_fire_cmd_fusion(instance, req_desc, instance->is_ventura);
megasas_fire_cmd_fusion(instance, req_desc);
return DCMD_SUCCESS;
}
@ -3294,8 +3296,7 @@ void megasas_refire_mgmt_cmd(struct megasas_instance *instance)
cpu_to_le32(MR_DCMD_SYSTEM_PD_MAP_GET_INFO)))
&& !(cmd_mfi->flags & DRV_DCMD_SKIP_REFIRE);
if (refire_cmd)
megasas_fire_cmd_fusion(instance, req_desc,
instance->is_ventura);
megasas_fire_cmd_fusion(instance, req_desc);
else
megasas_return_cmd(instance, cmd_mfi);
}
@ -3474,7 +3475,7 @@ megasas_issue_tm(struct megasas_instance *instance, u16 device_handle,
mr_request->tmReqFlags.isTMForLD = 1;
init_completion(&cmd_fusion->done);
megasas_fire_cmd_fusion(instance, req_desc, instance->is_ventura);
megasas_fire_cmd_fusion(instance, req_desc);
timeleft = wait_for_completion_timeout(&cmd_fusion->done, 50 * HZ);