[09/13] dma/idxd: add start and stop functions for pci devices
Checks
Commit Message
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>
---
drivers/dma/idxd/idxd_pci.c | 52 +++++++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)
@@ -59,11 +59,63 @@ 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_dmadev *dev)
+{
+ struct idxd_dmadev *idxd = dev->dev_private;
+ uint8_t err_code;
+
+ if (!idxd_is_wq_enabled(idxd)) {
+ IDXD_PMD_ERR("Work queue %d already disabled", idxd->qid);
+ return -EALREADY;
+ }
+
+ 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;
+ }
+ IDXD_PMD_DEBUG("Work queue %d disabled OK", idxd->qid);
+
+ return 0;
+}
+
+static int
+idxd_pci_dev_start(struct rte_dmadev *dev)
+{
+ struct idxd_dmadev *idxd = dev->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 const struct rte_dmadev_ops idxd_pci_ops = {
.dev_dump = idxd_dump,
.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 */