* Copyright 2019 Mellanox Technologies, Ltd
*/
#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
#include <rte_malloc.h>
#include <rte_errno.h>
+#include <rte_io.h>
#include <mlx5_common.h>
#include "mlx5_vdpa.h"
+static void
+mlx5_vdpa_virtq_handler(void *cb_arg)
+{
+ struct mlx5_vdpa_virtq *virtq = cb_arg;
+ struct mlx5_vdpa_priv *priv = virtq->priv;
+ uint64_t buf;
+ int nbytes;
+
+ do {
+ nbytes = read(virtq->intr_handle.fd, &buf, 8);
+ if (nbytes < 0) {
+ if (errno == EINTR ||
+ errno == EWOULDBLOCK ||
+ errno == EAGAIN)
+ continue;
+ DRV_LOG(ERR, "Failed to read kickfd of virtq %d: %s",
+ virtq->index, strerror(errno));
+ }
+ break;
+ } while (1);
+ rte_write32(virtq->index, priv->virtq_db_addr);
+ DRV_LOG(DEBUG, "Ring virtq %u doorbell.", virtq->index);
+}
+
static int
mlx5_vdpa_virtq_unset(struct mlx5_vdpa_virtq *virtq)
{
- int i;
+ unsigned int i;
+ int retries = MLX5_VDPA_INTR_RETRIES;
+ int ret = -EAGAIN;
+ if (virtq->intr_handle.fd != -1) {
+ while (retries-- && ret == -EAGAIN) {
+ ret = rte_intr_callback_unregister(&virtq->intr_handle,
+ mlx5_vdpa_virtq_handler,
+ virtq);
+ if (ret == -EAGAIN) {
+ DRV_LOG(DEBUG, "Try again to unregister fd %d "
+ "of virtq %d interrupt, retries = %d.",
+ virtq->intr_handle.fd,
+ (int)virtq->index, retries);
+ usleep(MLX5_VDPA_INTR_RETRIES_USEC);
+ }
+ }
+ virtq->intr_handle.fd = -1;
+ }
if (virtq->virtq) {
claim_zero(mlx5_devx_cmd_destroy(virtq->virtq));
virtq->virtq = NULL;
}
- for (i = 0; i < 3; ++i) {
+ for (i = 0; i < RTE_DIM(virtq->umems); ++i) {
if (virtq->umems[i].obj)
claim_zero(mlx5_glue->devx_umem_dereg
(virtq->umems[i].obj));
claim_zero(mlx5_devx_cmd_destroy(priv->td));
priv->td = NULL;
}
+ if (priv->virtq_db_addr) {
+ claim_zero(munmap(priv->virtq_db_addr, priv->var->length));
+ priv->virtq_db_addr = NULL;
+ }
priv->features = 0;
}
+int
+mlx5_vdpa_virtq_modify(struct mlx5_vdpa_virtq *virtq, int state)
+{
+ struct mlx5_devx_virtq_attr attr = {
+ .type = MLX5_VIRTQ_MODIFY_TYPE_STATE,
+ .state = state ? MLX5_VIRTQ_STATE_RDY :
+ MLX5_VIRTQ_STATE_SUSPEND,
+ .queue_index = virtq->index,
+ };
+
+ return mlx5_devx_cmd_modify_virtq(virtq->virtq, &attr);
+}
+
static uint64_t
mlx5_vdpa_hva_to_gpa(struct rte_vhost_memory *mem, uint64_t hva)
{
struct mlx5_devx_virtq_attr attr = {0};
uint64_t gpa;
int ret;
- int i;
+ unsigned int i;
uint16_t last_avail_idx;
uint16_t last_used_idx;
" need event QPs and event mechanism.", index);
}
/* Setup 3 UMEMs for each virtq. */
- for (i = 0; i < 3; ++i) {
+ for (i = 0; i < RTE_DIM(virtq->umems); ++i) {
virtq->umems[i].size = priv->caps.umems[i].a * vq.size +
priv->caps.umems[i].b;
virtq->umems[i].buf = rte_zmalloc(__func__,
}
attr.available_addr = gpa;
}
- rte_vhost_get_vring_base(priv->vid, index, &last_avail_idx,
+ ret = rte_vhost_get_vring_base(priv->vid, index, &last_avail_idx,
&last_used_idx);
- DRV_LOG(INFO, "vid %d: Init last_avail_idx=%d, last_used_idx=%d for "
- "virtq %d.", priv->vid, last_avail_idx, last_used_idx, index);
+ if (ret) {
+ last_avail_idx = 0;
+ last_used_idx = 0;
+ DRV_LOG(WARNING, "Couldn't get vring base, idx are set to 0");
+ } else {
+ DRV_LOG(INFO, "vid %d: Init last_avail_idx=%d, last_used_idx=%d for "
+ "virtq %d.", priv->vid, last_avail_idx,
+ last_used_idx, index);
+ }
attr.hw_available_index = last_avail_idx;
attr.hw_used_index = last_used_idx;
attr.q_size = vq.size;
attr.tis_id = priv->tis->id;
attr.queue_index = index;
virtq->virtq = mlx5_devx_cmd_create_virtq(priv->ctx, &attr);
+ virtq->priv = priv;
if (!virtq->virtq)
goto error;
+ if (mlx5_vdpa_virtq_modify(virtq, 1))
+ goto error;
+ virtq->enable = 1;
+ virtq->priv = priv;
+ /* Be sure notifications are not missed during configuration. */
+ claim_zero(rte_vhost_enable_guest_notification(priv->vid, index, 1));
+ rte_write32(virtq->index, priv->virtq_db_addr);
+ /* Setup doorbell mapping. */
+ virtq->intr_handle.fd = vq.kickfd;
+ if (virtq->intr_handle.fd == -1) {
+ DRV_LOG(WARNING, "Virtq %d kickfd is invalid.", index);
+ if (!priv->direct_notifier) {
+ DRV_LOG(ERR, "Virtq %d cannot be notified.", index);
+ goto error;
+ }
+ } else {
+ virtq->intr_handle.type = RTE_INTR_HANDLE_EXT;
+ if (rte_intr_callback_register(&virtq->intr_handle,
+ mlx5_vdpa_virtq_handler,
+ virtq)) {
+ virtq->intr_handle.fd = -1;
+ DRV_LOG(ERR, "Failed to register virtq %d interrupt.",
+ index);
+ goto error;
+ } else {
+ DRV_LOG(DEBUG, "Register fd %d interrupt for virtq %d.",
+ virtq->intr_handle.fd, index);
+ }
+ }
return 0;
error:
mlx5_vdpa_virtq_unset(virtq);
DRV_LOG(ERR, "Failed to configure negotiated features.");
return -1;
}
+ /* Always map the entire page. */
+ priv->virtq_db_addr = mmap(NULL, priv->var->length, PROT_READ |
+ PROT_WRITE, MAP_SHARED, priv->ctx->cmd_fd,
+ priv->var->mmap_off);
+ if (priv->virtq_db_addr == MAP_FAILED) {
+ DRV_LOG(ERR, "Failed to map doorbell page %u.", errno);
+ priv->virtq_db_addr = NULL;
+ goto error;
+ } else {
+ DRV_LOG(DEBUG, "VAR address of doorbell mapping is %p.",
+ priv->virtq_db_addr);
+ }
priv->td = mlx5_devx_cmd_create_td(priv->ctx);
if (!priv->td) {
DRV_LOG(ERR, "Failed to create transport domain.");
git.droids-corp.org / dpdk.git / blobdiff