diff mbox series

[v3,13/17] dma/idxd: add vchan status function

Message ID 20210908103016.1661914-14-kevin.laatz@intel.com (mailing list archive)
State Superseded, archived
Delegated to: Thomas Monjalon
Headers show
Series add dmadev driver for idxd devices | expand

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Kevin Laatz Sept. 8, 2021, 10:30 a.m. UTC
When testing dmadev drivers, it is useful to have the HW device in a known
state. This patch adds the implementation of the function which will wait
for the device to be idle (all jobs completed) before proceeding.

Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>

---
v3: update API name to vchan_status
---
 drivers/dma/idxd/idxd_bus.c      |  1 +
 drivers/dma/idxd/idxd_common.c   | 14 ++++++++++++++
 drivers/dma/idxd/idxd_internal.h |  2 ++
 drivers/dma/idxd/idxd_pci.c      |  1 +
 4 files changed, 18 insertions(+)

Comments

Walsh, Conor Sept. 9, 2021, 11:26 a.m. UTC | #1
> When testing dmadev drivers, it is useful to have the HW device in a known
> state. This patch adds the implementation of the function which will wait
> for the device to be idle (all jobs completed) before proceeding.
>
> Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>

<snip>

> +int
> +idxd_vchan_status(const struct rte_dmadev *dev, uint16_t vchan __rte_unused,
> +		enum rte_dmadev_vchan_status *status)
> +{
> +	struct idxd_dmadev *idxd = dev->dev_private;
> +	uint16_t last_batch_write = idxd->batch_idx_write == 0 ? idxd->max_batches :
> +			idxd->batch_idx_write - 1;
> +	uint8_t bstatus = (idxd->batch_comp_ring[last_batch_write].status != 0);
> +
> +	*status = bstatus ? RTE_DMA_VCHAN_IDLE : RTE_DMA_VCHAN_ACTIVE;
> +
> +	return 0;
> +}

Should there be a comment noting that RTE_DMA_VCHAN_HALTED_ERROR does 
not apply to IDXD?

Reviewed-by: Conor Walsh <conor.walsh@intel.com>
diff mbox series

Patch

diff --git a/drivers/dma/idxd/idxd_bus.c b/drivers/dma/idxd/idxd_bus.c
index 8781195d59..8f0fcad87a 100644
--- a/drivers/dma/idxd/idxd_bus.c
+++ b/drivers/dma/idxd/idxd_bus.c
@@ -101,6 +101,7 @@  static const struct rte_dmadev_ops idxd_vdev_ops = {
 		.dev_info_get = idxd_info_get,
 		.stats_get = idxd_stats_get,
 		.stats_reset = idxd_stats_reset,
+		.vchan_status = idxd_vchan_status,
 };
 
 static void *
diff --git a/drivers/dma/idxd/idxd_common.c b/drivers/dma/idxd/idxd_common.c
index 66d1b3432e..e20b41ae54 100644
--- a/drivers/dma/idxd/idxd_common.c
+++ b/drivers/dma/idxd/idxd_common.c
@@ -165,6 +165,20 @@  get_comp_status(struct idxd_completion *c)
 	}
 }
 
+int
+idxd_vchan_status(const struct rte_dmadev *dev, uint16_t vchan __rte_unused,
+		enum rte_dmadev_vchan_status *status)
+{
+	struct idxd_dmadev *idxd = dev->dev_private;
+	uint16_t last_batch_write = idxd->batch_idx_write == 0 ? idxd->max_batches :
+			idxd->batch_idx_write - 1;
+	uint8_t bstatus = (idxd->batch_comp_ring[last_batch_write].status != 0);
+
+	*status = bstatus ? RTE_DMA_VCHAN_IDLE : RTE_DMA_VCHAN_ACTIVE;
+
+	return 0;
+}
+
 static __rte_always_inline int
 batch_ok(struct idxd_dmadev *idxd, uint8_t max_ops, enum rte_dma_status_code *status)
 {
diff --git a/drivers/dma/idxd/idxd_internal.h b/drivers/dma/idxd/idxd_internal.h
index c04ee002d8..fcc0235a1d 100644
--- a/drivers/dma/idxd/idxd_internal.h
+++ b/drivers/dma/idxd/idxd_internal.h
@@ -101,5 +101,7 @@  uint16_t idxd_completed_status(struct rte_dmadev *dev, uint16_t qid __rte_unused
 int idxd_stats_get(const struct rte_dmadev *dev, uint16_t vchan,
 		struct rte_dmadev_stats *stats, uint32_t stats_sz);
 int idxd_stats_reset(struct rte_dmadev *dev, uint16_t vchan);
+int idxd_vchan_status(const struct rte_dmadev *dev, uint16_t vchan,
+		enum rte_dmadev_vchan_status *status);
 
 #endif /* _IDXD_INTERNAL_H_ */
diff --git a/drivers/dma/idxd/idxd_pci.c b/drivers/dma/idxd/idxd_pci.c
index a84232b6e9..f3a5d2a970 100644
--- a/drivers/dma/idxd/idxd_pci.c
+++ b/drivers/dma/idxd/idxd_pci.c
@@ -118,6 +118,7 @@  static const struct rte_dmadev_ops idxd_pci_ops = {
 	.stats_reset = idxd_stats_reset,
 	.dev_start = idxd_pci_dev_start,
 	.dev_stop = idxd_pci_dev_stop,
+	.vchan_status = idxd_vchan_status,
 };
 
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