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scsi: cxlflash: Refactor context reset to share reset logic

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As staging for supporting hardware with different context reset
registers but a similar reset procedure, refactor the existing context
reset routine to move the reset logic to a common routine. This will
allow hardware with a different reset register to leverage existing
code.

Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Matthew R. Ochs 2017-01-11 19:19:08 -06:00 committed by Martin K. Petersen
parent 73eba2be92
commit 9c7d1ee5f1
1 changed files with 16 additions and 4 deletions
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20
drivers/scsi/cxlflash/main.c
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@ -188,10 +188,11 @@ static void cmd_complete(struct afu_cmd *cmd)
}
/**
* context_reset_ioarrin() - reset command owner context via IOARRIN register
* context_reset() - reset command owner context via specified register
* @cmd: AFU command that timed out.
* @reset_reg: MMIO register to perform reset.
*/
static void context_reset_ioarrin(struct afu_cmd *cmd)
static void context_reset(struct afu_cmd *cmd, __be64 __iomem *reset_reg)
{
int nretry = 0;
u64 rrin = 0x1;
@ -201,9 +202,9 @@ static void context_reset_ioarrin(struct afu_cmd *cmd)
pr_debug("%s: cmd=%p\n", __func__, cmd);
writeq_be(rrin, &afu->host_map->ioarrin);
writeq_be(rrin, reset_reg);
do {
rrin = readq_be(&afu->host_map->ioarrin);
rrin = readq_be(reset_reg);
if (rrin != 0x1)
break;
/* Double delay each time */
@ -214,6 +215,17 @@ static void context_reset_ioarrin(struct afu_cmd *cmd)
__func__, rrin, nretry);
}
/**
* context_reset_ioarrin() - reset command owner context via IOARRIN register
* @cmd: AFU command that timed out.
*/
static void context_reset_ioarrin(struct afu_cmd *cmd)
{
struct afu *afu = cmd->parent;
context_reset(cmd, &afu->host_map->ioarrin);
}
/**
* send_cmd_ioarrin() - sends an AFU command via IOARRIN register
* @afu: AFU associated with the host.