Messages in this thread Patch in this message | | | Subject | [PATCH v1.0 10/16] arcmsr: clear outbound doorbell buffer | From | ching <> | Date | Wed, 30 Apr 2014 19:19:25 +0800 |
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From: Ching<ching2048@areca.com.tw>
Clearing outbound doorbell buffer completely for adapter type C.
Signed-off-by: Ching<ching2048@areca.com.tw> ---
diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c --- a/drivers/scsi/arcmsr/arcmsr_hba.c 2014-04-30 15:12:36.000000000 +0800 +++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2014-04-30 15:13:30.000000000 +0800 @@ -2934,11 +2934,23 @@ static void arcmsr_clear_doorbell_queue_ break; case ACB_ADAPTER_TYPE_C: { struct MessageUnit_C *reg = (struct MessageUnit_C *)acb->pmuC; - uint32_t outbound_doorbell; + uint32_t outbound_doorbell, i; /* empty doorbell Qbuffer if door bell ringed */ outbound_doorbell = readl(®->outbound_doorbell); writel(outbound_doorbell, ®->outbound_doorbell_clear); writel(ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK, ®->inbound_doorbell); + for (i = 0; i < 200; i++) { + msleep(20); + outbound_doorbell = readl(®->outbound_doorbell); + if (outbound_doorbell & + ARCMSR_HBCMU_IOP2DRV_DATA_WRITE_OK) { + writel(outbound_doorbell, + ®->outbound_doorbell_clear); + writel(ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK, + ®->inbound_doorbell); + } else + break; + } } } } @@ -3166,9 +3178,7 @@ sleep: arcmsr_get_firmware_spec(acb); arcmsr_start_adapter_bgrb(acb); /* clear Qbuffer if door bell ringed */ - outbound_doorbell = readl(®->outbound_doorbell); - writel(outbound_doorbell, ®->outbound_doorbell_clear); /*clear interrupt */ - writel(ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK, ®->inbound_doorbell); + arcmsr_clear_doorbell_queue_buffer(acb); /* enable outbound Post Queue,outbound doorbell Interrupt */ arcmsr_enable_outbound_ints(acb, intmask_org); atomic_set(&acb->rq_map_token, 16);
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