[dpdk-dev] [PATCH v5 08/12] dma/ioat: add statistics

[Conor Walsh]

Add statistic tracking for operations in IOAT.

Signed-off-by: Conor Walsh <conor.wa...@intel.com>
Reviewed-by: Kevin Laatz <kevin.la...@intel.com>
Acked-by: Bruce Richardson <bruce.richard...@intel.com>
---
 drivers/dma/ioat/ioat_dmadev.c | 43 ++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/drivers/dma/ioat/ioat_dmadev.c b/drivers/dma/ioat/ioat_dmadev.c
index b2b7ebb3db..20ae364318 100644
--- a/drivers/dma/ioat/ioat_dmadev.c
+++ b/drivers/dma/ioat/ioat_dmadev.c
@@ -77,6 +77,9 @@ ioat_vchan_setup(struct rte_dma_dev *dev, uint16_t vchan 
__rte_unused,
        ioat->offset = 0;
        ioat->failure = 0;
 
+       /* Reset Stats. */
+       ioat->stats = (struct rte_dma_stats){0};
+
        /* Configure descriptor ring - each one points to next. */
        for (i = 0; i < ioat->qcfg.nb_desc; i++) {
                ioat->desc_ring[i].next = ioat->ring_addr +
@@ -222,6 +225,8 @@ __submit(struct ioat_dmadev *ioat)
 {
        *ioat->doorbell = ioat->next_write - ioat->offset;
 
+       ioat->stats.submitted += (uint16_t)(ioat->next_write - 
ioat->last_write);
+
        ioat->last_write = ioat->next_write;
 }
 
@@ -352,6 +357,10 @@ ioat_dev_dump(const struct rte_dma_dev *dev, FILE *f)
        fprintf(f, "    Dest: 0x%"PRIx64"\n", ioat->desc_ring[ioat->next_read & 
mask].dest_addr);
        fprintf(f, "    Next: 0x%"PRIx64"\n", ioat->desc_ring[ioat->next_read & 
mask].next);
        fprintf(f, "  }\n");
+       fprintf(f, "  Key Stats { submitted: %"PRIu64", comp: %"PRIu64", 
failed: %"PRIu64" }\n",
+                       ioat->stats.submitted,
+                       ioat->stats.completed,
+                       ioat->stats.errors);
 
        return 0;
 }
@@ -441,6 +450,9 @@ ioat_completed(struct rte_dma_dev *dev, uint16_t qid 
__rte_unused, const uint16_
                *last_idx = ioat->next_read - 2;
        }
 
+       ioat->stats.completed += count;
+       ioat->stats.errors += fails;
+
        return count;
 }
 
@@ -491,9 +503,38 @@ ioat_completed_status(struct rte_dma_dev *dev, uint16_t 
qid __rte_unused,
 
        *last_idx = ioat->next_read - 1;
 
+       ioat->stats.completed += count;
+       ioat->stats.errors += fails;
+
        return count;
 }
 
+/* Retrieve the generic stats of a DMA device. */
+static int
+ioat_stats_get(const struct rte_dma_dev *dev, uint16_t vchan __rte_unused,
+               struct rte_dma_stats *rte_stats, uint32_t size)
+{
+       struct rte_dma_stats *stats = (&((struct ioat_dmadev 
*)dev->dev_private)->stats);
+
+       if (size < sizeof(rte_stats))
+               return -EINVAL;
+       if (rte_stats == NULL)
+               return -EINVAL;
+
+       *rte_stats = *stats;
+       return 0;
+}
+
+/* Reset the generic stat counters for the DMA device. */
+static int
+ioat_stats_reset(struct rte_dma_dev *dev, uint16_t vchan __rte_unused)
+{
+       struct ioat_dmadev *ioat = dev->dev_private;
+
+       ioat->stats = (struct rte_dma_stats){0};
+       return 0;
+}
+
 /* Create a DMA device. */
 static int
 ioat_dmadev_create(const char *name, struct rte_pci_device *dev)
@@ -505,6 +546,8 @@ ioat_dmadev_create(const char *name, struct rte_pci_device 
*dev)
                .dev_info_get = ioat_dev_info_get,
                .dev_start = ioat_dev_start,
                .dev_stop = ioat_dev_stop,
+               .stats_get = ioat_stats_get,
+               .stats_reset = ioat_stats_reset,
                .vchan_setup = ioat_vchan_setup,
        };
 
-- 
2.25.1