dma/ioat: add vchan status

Add support for the rte_dmadev_vchan_status API call.

Signed-off-by: Conor Walsh <conor.walsh@intel.com>
Reviewed-by: Kevin Laatz <kevin.laatz@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

diff --git a/drivers/dma/ioat/ioat_dmadev.c b/drivers/dma/ioat/ioat_dmadev.c
index 48126a1..3d4d7b6 100644 (file)
--- a/drivers/dma/ioat/ioat_dmadev.c
+++ b/drivers/dma/ioat/ioat_dmadev.c
@@ -542,6 +542,26 @@ ioat_stats_reset(struct rte_dma_dev *dev, uint16_t vchan __rte_unused)
        return 0;
 }
 
+/* Check if the IOAT device is idle. */
+static int
+ioat_vchan_status(const struct rte_dma_dev *dev, uint16_t vchan __rte_unused,
+               enum rte_dma_vchan_status *status)
+{
+       int state = 0;
+       const struct ioat_dmadev *ioat = dev->fp_obj->dev_private;
+       const uint16_t mask = ioat->qcfg.nb_desc - 1;
+       const uint16_t last = __get_last_completed(ioat, &state);
+
+       if (state == IOAT_CHANSTS_HALTED || state == IOAT_CHANSTS_SUSPENDED)
+               *status = RTE_DMA_VCHAN_HALTED_ERROR;
+       else if (last == ((ioat->next_write - 1) & mask))
+               *status = RTE_DMA_VCHAN_IDLE;
+       else
+               *status = RTE_DMA_VCHAN_ACTIVE;
+
+       return 0;
+}
+
 /* Create a DMA device. */
 static int
 ioat_dmadev_create(const char *name, struct rte_pci_device *dev)
@@ -555,6 +575,7 @@ ioat_dmadev_create(const char *name, struct rte_pci_device *dev)
                .dev_stop = ioat_dev_stop,
                .stats_get = ioat_stats_get,
                .stats_reset = ioat_stats_reset,
+               .vchan_status = ioat_vchan_status,
                .vchan_setup = ioat_vchan_setup,
        };