d/numam-dpdk
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

dma/idxd: add start and stop for PCI devices

Browse Source 
Add device start/stop functions for DSA devices bound to vfio. For devices
bound to the IDXD kernel driver, these are not required since the IDXD
kernel driver takes care of this.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Reviewed-by: Conor Walsh <conor.walsh@intel.com>
This commit is contained in:
Kevin Laatz 2021-10-20 16:30:05 +00:00 committed by Thomas Monjalon
parent 2f7d42c6e1
commit a42ac7e31e
2 changed files with 54 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
doc/guides/dmadevs/idxd.rst
View File

@ -135,3 +135,6 @@ IDXD configuration requirements:
* Only one ``vchan`` is supported per device (work queue).
* IDXD devices do not support silent mode.
* The transfer direction must be set to ``RTE_DMA_DIR_MEM_TO_MEM`` to copy from memory to memory.
Once configured, the device can then be made ready for use by calling the
``rte_dma_start()`` API.

51
drivers/dma/idxd/idxd_pci.c
View File

@ -60,6 +60,55 @@ idxd_is_wq_enabled(struct idxd_dmadev *idxd)
return ((state >> WQ_STATE_SHIFT) & WQ_STATE_MASK) == 0x1;
}
static int
idxd_pci_dev_stop(struct rte_dma_dev *dev)
{
struct idxd_dmadev *idxd = dev->fp_obj->dev_private;
uint8_t err_code;
if (!idxd_is_wq_enabled(idxd)) {
IDXD_PMD_ERR("Work queue %d already disabled", idxd->qid);
return 0;
}
err_code = idxd_pci_dev_command(idxd, idxd_disable_wq);
if (err_code || idxd_is_wq_enabled(idxd)) {
IDXD_PMD_ERR("Failed disabling work queue %d, error code: %#x",
idxd->qid, err_code);
return err_code == 0 ? -1 : -err_code;
}
IDXD_PMD_DEBUG("Work queue %d disabled OK", idxd->qid);
return 0;
}
static int
idxd_pci_dev_start(struct rte_dma_dev *dev)
{
struct idxd_dmadev *idxd = dev->fp_obj->dev_private;
uint8_t err_code;
if (idxd_is_wq_enabled(idxd)) {
IDXD_PMD_WARN("WQ %d already enabled", idxd->qid);
return 0;
}
if (idxd->desc_ring == NULL) {
IDXD_PMD_ERR("WQ %d has not been fully configured", idxd->qid);
return -EINVAL;
}
err_code = idxd_pci_dev_command(idxd, idxd_enable_wq);
if (err_code || !idxd_is_wq_enabled(idxd)) {
IDXD_PMD_ERR("Failed enabling work queue %d, error code: %#x",
idxd->qid, err_code);
return err_code == 0 ? -1 : -err_code;
}
IDXD_PMD_DEBUG("Work queue %d enabled OK", idxd->qid);
return 0;
}
static int
idxd_pci_dev_close(struct rte_dma_dev *dev)
{
@ -88,6 +137,8 @@ static const struct rte_dma_dev_ops idxd_pci_ops = {
.dev_configure = idxd_configure,
.vchan_setup = idxd_vchan_setup,
.dev_info_get = idxd_info_get,
.dev_start = idxd_pci_dev_start,
.dev_stop = idxd_pci_dev_stop,
};
/* each portal uses 4 x 4k pages */