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dmanegine: idxd: add software command status

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Enabling device and wq returns standard errno and that does not provide
enough details to indicate what exactly failed. The hardware command status
is only 8bits. Expand the command status to 32bits and use the upper 16
bits to define software errors to provide more details on the exact
failure. Bit 31 will be used to indicate the error is software set as the
driver is using some of the spec defined hardware error as well.

Cc: Ramesh Thomas <ramesh.thomas@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162681373579.1968485.5891788397526827892.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Dave Jiang
2021-07-20 13:42:15 -07:00
committed by Vinod Koul
parent a9c171527a
commit 125d10373a
7 changed files with 63 additions and 6 deletions
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5
drivers/dma/idxd/cdev.c
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@@ -320,9 +320,12 @@ static int idxd_user_drv_probe(struct idxd_dev *idxd_dev)
goto err;
rc = idxd_wq_add_cdev(wq);
if (rc < 0)
if (rc < 0) {
idxd->cmd_status = IDXD_SCMD_CDEV_ERR;
goto err_cdev;
}
idxd->cmd_status = 0;
mutex_unlock(&wq->wq_lock);
return 0;