diff mbox series

[v3,3/6] dma/ioat: fix incorrect error reporting on restart

Message ID 20230216110919.373385-4-bruce.richardson@intel.com (mailing list archive)
State Accepted, archived
Delegated to: Thomas Monjalon
Headers
Series dma/ioat: fix issues with stopping and restarting device |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Bruce Richardson Feb. 16, 2023, 11:09 a.m. UTC 
  When the DMA device was stopped and restarted by the driver, the control
register specifying the behaviour on error was not getting correctly
reset. This caused unit tests to fail as explicitly introduced errors
were got getting reported back.

Fix by moving the setting of the register to the start function from the
probe function.

Fixes: 583f046dd404 ("dma/ioat: add start and stop")
Cc: conor.walsh@intel.com
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Reviewed-by: Conor Walsh <conor.walsh@intel.com>
Acked-by: Kevin Laatz <kevin.laatz@intel.com>
---
 drivers/dma/ioat/ioat_dmadev.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/dma/ioat/ioat_dmadev.c b/drivers/dma/ioat/ioat_dmadev.c
index 072eb17cd9..57c18c081d 100644
--- a/drivers/dma/ioat/ioat_dmadev.c
+++ b/drivers/dma/ioat/ioat_dmadev.c
@@ -142,6 +142,9 @@  ioat_dev_start(struct rte_dma_dev *dev)
 	ioat->regs->chainaddr = ioat->ring_addr;
 	/* Inform hardware of where to write the status/completions. */
 	ioat->regs->chancmp = ioat->status_addr;
+	/* Ensure channel control is set to abort on error, so we get status writeback. */
+	ioat->regs->chanctrl = IOAT_CHANCTRL_ANY_ERR_ABORT_EN |
+			IOAT_CHANCTRL_ERR_COMPLETION_EN;
 
 	/* Prime the status register to be set to the last element. */
 	ioat->status = ioat->ring_addr + ((ioat->qcfg.nb_desc - 1) * DESC_SZ);
@@ -682,8 +685,6 @@  ioat_dmadev_create(const char *name, struct rte_pci_device *dev)
 			return -EIO;
 		}
 	}
-	ioat->regs->chanctrl = IOAT_CHANCTRL_ANY_ERR_ABORT_EN |
-			IOAT_CHANCTRL_ERR_COMPLETION_EN;
 
 	dmadev->fp_obj->dev_private = ioat;