diff mbox series

[v7,10/12] dma/ioat: add burst capacity function

Message ID 20211014094902.489159-11-conor.walsh@intel.com (mailing list archive)
State Superseded, archived
Delegated to: Thomas Monjalon
Headers
Series dma: add dmadev driver for ioat devices |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Conor Walsh Oct. 14, 2021, 9:49 a.m. UTC 
  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(-)
diff mbox series

Patch

diff --git a/drivers/dma/ioat/ioat_dmadev.c b/drivers/dma/ioat/ioat_dmadev.c
index 17ac3217c7..a230496b11 100644
--- a/drivers/dma/ioat/ioat_dmadev.c
+++ b/drivers/dma/ioat/ioat_dmadev.c
@@ -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;