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raw/ioat: start and stop idxd device

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Add the start and stop functions for DSA hardware devices using the
vfio/uio kernel drivers. For vdevs using the idxd kernel driver, the device
must be started using sysfs before the device node appears for vdev use -
making start/stop functions in the driver unnecessary.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Reviewed-by: Kevin Laatz <kevin.laatz@intel.com>
Acked-by: Radu Nicolau <radu.nicolau@intel.com>
This commit is contained in:
Bruce Richardson 2020-10-08 10:51:26 +01:00 committed by Thomas Monjalon
parent 69c4162643
commit 2f22aeb197
1 changed files with 50 additions and 0 deletions
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50
drivers/raw/ioat/idxd_pci.c
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@ -51,11 +51,61 @@ idxd_is_wq_enabled(struct idxd_rawdev *idxd)
return ((state >> WQ_STATE_SHIFT) & WQ_STATE_MASK) == 0x1;
}
static void
idxd_pci_dev_stop(struct rte_rawdev *dev)
{
struct idxd_rawdev *idxd = dev->dev_private;
uint8_t err_code;
if (!idxd_is_wq_enabled(idxd)) {
IOAT_PMD_ERR("Work queue %d already disabled", idxd->qid);
return;
}
err_code = idxd_pci_dev_command(idxd, idxd_disable_wq);
if (err_code || idxd_is_wq_enabled(idxd)) {
IOAT_PMD_ERR("Failed disabling work queue %d, error code: %#x",
idxd->qid, err_code);
return;
}
IOAT_PMD_DEBUG("Work queue %d disabled OK", idxd->qid);
}
static int
idxd_pci_dev_start(struct rte_rawdev *dev)
{
struct idxd_rawdev *idxd = dev->dev_private;
uint8_t err_code;
if (idxd_is_wq_enabled(idxd)) {
IOAT_PMD_WARN("WQ %d already enabled", idxd->qid);
return 0;
}
if (idxd->public.batch_ring == NULL) {
IOAT_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)) {
IOAT_PMD_ERR("Failed enabling work queue %d, error code: %#x",
idxd->qid, err_code);
return err_code == 0 ? -1 : err_code;
}
IOAT_PMD_DEBUG("Work queue %d enabled OK", idxd->qid);
return 0;
}
static const struct rte_rawdev_ops idxd_pci_ops = {
.dev_close = idxd_rawdev_close,
.dev_selftest = idxd_rawdev_test,
.dump = idxd_dev_dump,
.dev_configure = idxd_dev_configure,
.dev_start = idxd_pci_dev_start,
.dev_stop = idxd_pci_dev_stop,
};
/* each portal uses 4 x 4k pages */