[v7,10/12] dma/ioat: add burst capacity function
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Commit Message
Adds the ability to find the remaining space in the IOAT ring.
Signed-off-by: Conor Walsh <conor.walsh@intel.com>
Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
---
drivers/dma/ioat/ioat_dmadev.c | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
@@ -516,12 +516,25 @@ ioat_completed_status(void *dev_private, uint16_t qid __rte_unused,
return count;
}
+/* Get the remaining capacity of the ring. */
+static uint16_t
+ioat_burst_capacity(const void *dev_private, uint16_t vchan __rte_unused)
+{
+ const struct ioat_dmadev *ioat = dev_private;
+ unsigned short size = ioat->qcfg.nb_desc - 1;
+ unsigned short read = ioat->next_read;
+ unsigned short write = ioat->next_write;
+ unsigned short space = size - (write - read);
+
+ return space;
+}
+
/* 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);
+ struct rte_dma_stats *stats = (&((struct ioat_dmadev *)dev->fp_obj->dev_private)->stats);
if (size < sizeof(rte_stats))
return -EINVAL;
@@ -536,7 +549,7 @@ ioat_stats_get(const struct rte_dma_dev *dev, uint16_t vchan __rte_unused,
static int
ioat_stats_reset(struct rte_dma_dev *dev, uint16_t vchan __rte_unused)
{
- struct ioat_dmadev *ioat = dev->dev_private;
+ struct ioat_dmadev *ioat = dev->fp_obj->dev_private;
ioat->stats = (struct rte_dma_stats){0};
return 0;
@@ -548,7 +561,7 @@ 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->dev_private;
+ 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);
@@ -601,6 +614,7 @@ ioat_dmadev_create(const char *name, struct rte_pci_device *dev)
dmadev->dev_ops = &ioat_dmadev_ops;
+ dmadev->fp_obj->burst_capacity = ioat_burst_capacity;
dmadev->fp_obj->completed = ioat_completed;
dmadev->fp_obj->completed_status = ioat_completed_status;
dmadev->fp_obj->copy = ioat_enqueue_copy;