dma/idxd: add vchan status

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

diff --git a/drivers/dma/idxd/idxd_bus.c b/drivers/dma/idxd/idxd_bus.c
index 78299da..08639e9 100644 (file)
--- a/drivers/dma/idxd/idxd_bus.c
+++ b/drivers/dma/idxd/idxd_bus.c
@@ -102,6 +102,7 @@ static const struct rte_dma_dev_ops idxd_bus_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 60dbd87..5ba0b69 100644 (file)
--- a/drivers/dma/idxd/idxd_common.c
+++ b/drivers/dma/idxd/idxd_common.c
@@ -163,6 +163,23 @@ get_comp_status(struct idxd_completion *c)
        }
 }
 
+int
+idxd_vchan_status(const struct rte_dma_dev *dev, uint16_t vchan __rte_unused,
+               enum rte_dma_vchan_status *status)
+{
+       struct idxd_dmadev *idxd = dev->fp_obj->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);
+
+       /* An IDXD device will always be either active or idle.
+        * RTE_DMA_VCHAN_HALTED_ERROR is therefore not supported by IDXD.
+        */
+       *status = bstatus ? RTE_DMA_VCHAN_IDLE : RTE_DMA_VCHAN_ACTIVE;
+
+       return 0;
+}
+
 static __rte_always_inline int
 batch_ok(struct idxd_dmadev *idxd, uint16_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 a85a1fb..50acb82 100644 (file)
--- a/drivers/dma/idxd/idxd_internal.h
+++ b/drivers/dma/idxd/idxd_internal.h
@@ -102,5 +102,7 @@ uint16_t idxd_completed_status(void *dev_private, uint16_t qid __rte_unused,
 int idxd_stats_get(const struct rte_dma_dev *dev, uint16_t vchan,
                struct rte_dma_stats *stats, uint32_t stats_sz);
 int idxd_stats_reset(struct rte_dma_dev *dev, uint16_t vchan);
+int idxd_vchan_status(const struct rte_dma_dev *dev, uint16_t vchan,
+               enum rte_dma_vchan_status *status);
 
 #endif /* _IDXD_INTERNAL_H_ */

diff --git a/drivers/dma/idxd/idxd_pci.c b/drivers/dma/idxd/idxd_pci.c
index c0b7802..81952cf 100644 (file)
--- a/drivers/dma/idxd/idxd_pci.c
+++ b/drivers/dma/idxd/idxd_pci.c
@@ -141,6 +141,7 @@ static const struct rte_dma_dev_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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