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dma/ioat: add burst capacity

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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>
This commit is contained in:
Conor Walsh 2021-10-18 12:38:33 +00:00 committed by Thomas Monjalon
parent 912c204424
commit 96d7833393
1 changed files with 14 additions and 0 deletions
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14
drivers/dma/ioat/ioat_dmadev.c
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@ -516,6 +516,19 @@ 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,
@ -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;