lkml.org 
[lkml]   [2014]   [Aug]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH v1.3 10/18] arcmsr: clear outbound doorbell buffer completely
From
Date
From: Ching Huang <ching2048@areca.com.tw>

Clear outbound doorbell buffer completely for adapter type C.
This is to prevent getting bad data input from IOP before ioctl command beginning.

Signed-off-by: Ching Huang <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 2014-08-04 16:44:50.000000000 +0800
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2014-08-04 16:45:00.000000000 +0800
@@ -2888,11 +2888,23 @@ 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(&reg->outbound_doorbell);
writel(outbound_doorbell, &reg->outbound_doorbell_clear);
writel(ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK, &reg->inbound_doorbell);
+ for (i = 0; i < 200; i++) {
+ msleep(20);
+ outbound_doorbell = readl(&reg->outbound_doorbell);
+ if (outbound_doorbell &
+ ARCMSR_HBCMU_IOP2DRV_DATA_WRITE_OK) {
+ writel(outbound_doorbell,
+ &reg->outbound_doorbell_clear);
+ writel(ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK,
+ &reg->inbound_doorbell);
+ } else
+ break;
+ }
}
}
}
@@ -3120,9 +3132,7 @@ sleep:
arcmsr_get_firmware_spec(acb);
arcmsr_start_adapter_bgrb(acb);
/* clear Qbuffer if door bell ringed */
- outbound_doorbell = readl(&reg->outbound_doorbell);
- writel(outbound_doorbell, &reg->outbound_doorbell_clear); /*clear interrupt */
- writel(ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK, &reg->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);



\
 
 \ /
  Last update: 2014-08-04 12:01    [W:0.028 / U:1.552 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site