#include <unistd.h>
#include <stdint.h>
#include <fcntl.h>
+#include <sys/eventfd.h>
#include <rte_malloc.h>
#include <rte_errno.h>
#include <rte_atomic.h>
#include <rte_common.h>
#include <rte_io.h>
+#include <rte_alarm.h>
#include <mlx5_common.h>
mlx5_glue->devx_free_uar(priv->uar);
priv->uar = NULL;
}
+#ifdef HAVE_IBV_DEVX_EVENT
if (priv->eventc) {
+ union {
+ struct mlx5dv_devx_async_event_hdr event_resp;
+ uint8_t buf[sizeof(struct mlx5dv_devx_async_event_hdr)
+ + 128];
+ } out;
+
+ /* Clean all pending events. */
+ while (mlx5_glue->devx_get_event(priv->eventc, &out.event_resp,
+ sizeof(out.buf)) >=
+ (ssize_t)sizeof(out.event_resp.cookie))
+ ;
mlx5_glue->devx_destroy_event_channel(priv->eventc);
priv->eventc = NULL;
}
+#endif
priv->eqn = 0;
}
memset(cq, 0, sizeof(*cq));
}
-static inline void
+static inline void __rte_unused
mlx5_vdpa_cq_arm(struct mlx5_vdpa_priv *priv, struct mlx5_vdpa_cq *cq)
{
uint32_t arm_sn = cq->arm_sn << MLX5_CQ_SQN_OFFSET;
*((uint32_t *)addr + 1) = db_be >> 32;
#endif
cq->arm_sn++;
+ cq->armed = 1;
}
static int
struct mlx5_devx_cq_attr attr;
size_t pgsize = sysconf(_SC_PAGESIZE);
uint32_t umem_size;
- int ret;
uint16_t event_nums[1] = {0};
+ uint16_t cq_size = 1 << log_desc_n;
+ int ret;
cq->log_desc_n = log_desc_n;
- umem_size = sizeof(struct mlx5_cqe) * (1 << log_desc_n) +
- sizeof(*cq->db_rec) * 2;
+ umem_size = sizeof(struct mlx5_cqe) * cq_size + sizeof(*cq->db_rec) * 2;
cq->umem_buf = rte_zmalloc(__func__, umem_size, 4096);
if (!cq->umem_buf) {
DRV_LOG(ERR, "Failed to allocate memory for CQ.");
}
attr.q_umem_valid = 1;
attr.db_umem_valid = 1;
- attr.use_first_only = 0;
+ attr.use_first_only = 1;
attr.overrun_ignore = 0;
attr.uar_page_id = priv->uar->page_id;
attr.q_umem_id = cq->umem_obj->umem_id;
attr.q_umem_offset = 0;
attr.db_umem_id = cq->umem_obj->umem_id;
- attr.db_umem_offset = sizeof(struct mlx5_cqe) * (1 << log_desc_n);
+ attr.db_umem_offset = sizeof(struct mlx5_cqe) * cq_size;
attr.eqn = priv->eqn;
attr.log_cq_size = log_desc_n;
attr.log_page_size = rte_log2_u32(pgsize);
rte_errno = errno;
goto error;
}
- /* Subscribe CQ event to the guest FD only if it is not in poll mode. */
- if (callfd != -1) {
- ret = mlx5_glue->devx_subscribe_devx_event_fd(priv->eventc,
- callfd,
- cq->cq->obj, 0);
- if (ret) {
- DRV_LOG(ERR, "Failed to subscribe CQE event fd.");
- rte_errno = errno;
- goto error;
- }
- }
+ cq->callfd = callfd;
+ /* Init CQ to ones to be in HW owner in the start. */
+ cq->cqes[0].op_own = MLX5_CQE_OWNER_MASK;
+ cq->cqes[0].wqe_counter = rte_cpu_to_be_16(cq_size - 1);
/* First arming. */
mlx5_vdpa_cq_arm(priv, cq);
return 0;
return -1;
}
-static inline void __rte_unused
-mlx5_vdpa_cq_poll(struct mlx5_vdpa_priv *priv __rte_unused,
- struct mlx5_vdpa_cq *cq)
+static inline uint32_t
+mlx5_vdpa_cq_poll(struct mlx5_vdpa_cq *cq)
{
struct mlx5_vdpa_event_qp *eqp =
container_of(cq, struct mlx5_vdpa_event_qp, cq);
const unsigned int cq_size = 1 << cq->log_desc_n;
const unsigned int cq_mask = cq_size - 1;
- int ret;
-
- do {
- volatile struct mlx5_cqe *cqe = cq->cqes + (cq->cq_ci &
- cq_mask);
+ union {
+ struct {
+ uint16_t wqe_counter;
+ uint8_t rsvd5;
+ uint8_t op_own;
+ };
+ uint32_t word;
+ } last_word;
+ uint16_t next_wqe_counter = cq->cq_ci & cq_mask;
+ uint16_t cur_wqe_counter;
+ uint16_t comp;
- ret = check_cqe(cqe, cq_size, cq->cq_ci);
- switch (ret) {
- case MLX5_CQE_STATUS_ERR:
+ last_word.word = rte_read32(&cq->cqes[0].wqe_counter);
+ cur_wqe_counter = rte_be_to_cpu_16(last_word.wqe_counter);
+ comp = (cur_wqe_counter + 1u - next_wqe_counter) & cq_mask;
+ if (comp) {
+ cq->cq_ci += comp;
+ MLX5_ASSERT(!!(cq->cq_ci & cq_size) ==
+ MLX5_CQE_OWNER(last_word.op_own));
+ MLX5_ASSERT(MLX5_CQE_OPCODE(last_word.op_own) !=
+ MLX5_CQE_INVALID);
+ if (unlikely(!(MLX5_CQE_OPCODE(last_word.op_own) ==
+ MLX5_CQE_RESP_ERR ||
+ MLX5_CQE_OPCODE(last_word.op_own) ==
+ MLX5_CQE_REQ_ERR)))
cq->errors++;
- /*fall-through*/
- case MLX5_CQE_STATUS_SW_OWN:
- cq->cq_ci++;
+ rte_io_wmb();
+ /* Ring CQ doorbell record. */
+ cq->db_rec[0] = rte_cpu_to_be_32(cq->cq_ci);
+ rte_io_wmb();
+ /* Ring SW QP doorbell record. */
+ eqp->db_rec[0] = rte_cpu_to_be_32(cq->cq_ci + cq_size);
+ }
+ return comp;
+}
+
+static void
+mlx5_vdpa_arm_all_cqs(struct mlx5_vdpa_priv *priv)
+{
+ struct mlx5_vdpa_cq *cq;
+ int i;
+
+ for (i = 0; i < priv->nr_virtqs; i++) {
+ cq = &priv->virtqs[i].eqp.cq;
+ if (cq->cq && !cq->armed)
+ mlx5_vdpa_cq_arm(priv, cq);
+ }
+}
+
+static void
+mlx5_vdpa_timer_sleep(struct mlx5_vdpa_priv *priv, uint32_t max)
+{
+ if (priv->event_mode == MLX5_VDPA_EVENT_MODE_DYNAMIC_TIMER) {
+ switch (max) {
+ case 0:
+ priv->timer_delay_us += priv->event_us;
+ break;
+ case 1:
break;
- case MLX5_CQE_STATUS_HW_OWN:
default:
+ priv->timer_delay_us /= max;
break;
}
- } while (ret != MLX5_CQE_STATUS_HW_OWN);
- rte_io_wmb();
- /* Ring CQ doorbell record. */
- cq->db_rec[0] = rte_cpu_to_be_32(cq->cq_ci);
- rte_io_wmb();
- /* Ring SW QP doorbell record. */
- eqp->db_rec[0] = rte_cpu_to_be_32(cq->cq_ci + cq_size);
+ }
+ usleep(priv->timer_delay_us);
+}
+
+static void *
+mlx5_vdpa_poll_handle(void *arg)
+{
+ struct mlx5_vdpa_priv *priv = arg;
+ int i;
+ struct mlx5_vdpa_cq *cq;
+ uint32_t max;
+ uint64_t current_tic;
+
+ pthread_mutex_lock(&priv->timer_lock);
+ while (!priv->timer_on)
+ pthread_cond_wait(&priv->timer_cond, &priv->timer_lock);
+ pthread_mutex_unlock(&priv->timer_lock);
+ priv->timer_delay_us = priv->event_mode ==
+ MLX5_VDPA_EVENT_MODE_DYNAMIC_TIMER ?
+ MLX5_VDPA_DEFAULT_TIMER_DELAY_US :
+ priv->event_us;
+ while (1) {
+ max = 0;
+ for (i = 0; i < priv->nr_virtqs; i++) {
+ cq = &priv->virtqs[i].eqp.cq;
+ if (cq->cq && !cq->armed) {
+ uint32_t comp = mlx5_vdpa_cq_poll(cq);
+
+ if (comp) {
+ /* Notify guest for descs consuming. */
+ if (cq->callfd != -1)
+ eventfd_write(cq->callfd,
+ (eventfd_t)1);
+ if (comp > max)
+ max = comp;
+ }
+ }
+ }
+ current_tic = rte_rdtsc();
+ if (!max) {
+ /* No traffic ? stop timer and load interrupts. */
+ if (current_tic - priv->last_traffic_tic >=
+ rte_get_timer_hz() * priv->no_traffic_time_s) {
+ DRV_LOG(DEBUG, "Device %s traffic was stopped.",
+ priv->vdev->device->name);
+ mlx5_vdpa_arm_all_cqs(priv);
+ pthread_mutex_lock(&priv->timer_lock);
+ priv->timer_on = 0;
+ while (!priv->timer_on)
+ pthread_cond_wait(&priv->timer_cond,
+ &priv->timer_lock);
+ pthread_mutex_unlock(&priv->timer_lock);
+ priv->timer_delay_us = priv->event_mode ==
+ MLX5_VDPA_EVENT_MODE_DYNAMIC_TIMER ?
+ MLX5_VDPA_DEFAULT_TIMER_DELAY_US :
+ priv->event_us;
+ continue;
+ }
+ } else {
+ priv->last_traffic_tic = current_tic;
+ }
+ mlx5_vdpa_timer_sleep(priv, max);
+ }
+ return NULL;
}
static void
mlx5_vdpa_interrupt_handler(void *cb_arg)
{
-#ifndef HAVE_IBV_DEVX_EVENT
- (void)cb_arg;
- return;
-#else
struct mlx5_vdpa_priv *priv = cb_arg;
+#ifdef HAVE_IBV_DEVX_EVENT
union {
struct mlx5dv_devx_async_event_hdr event_resp;
uint8_t buf[sizeof(struct mlx5dv_devx_async_event_hdr) + 128];
(ssize_t)sizeof(out.event_resp.cookie)) {
struct mlx5_vdpa_cq *cq = (struct mlx5_vdpa_cq *)
(uintptr_t)out.event_resp.cookie;
- rte_spinlock_lock(&cq->sl);
- mlx5_vdpa_cq_poll(priv, cq);
- mlx5_vdpa_cq_arm(priv, cq);
- rte_spinlock_unlock(&cq->sl);
- DRV_LOG(DEBUG, "CQ %d event: new cq_ci = %u.", cq->cq->id,
- cq->cq_ci);
+ struct mlx5_vdpa_event_qp *eqp = container_of(cq,
+ struct mlx5_vdpa_event_qp, cq);
+ struct mlx5_vdpa_virtq *virtq = container_of(eqp,
+ struct mlx5_vdpa_virtq, eqp);
+
+ mlx5_vdpa_cq_poll(cq);
+ /* Notify guest for descs consuming. */
+ if (cq->callfd != -1)
+ eventfd_write(cq->callfd, (eventfd_t)1);
+ if (priv->event_mode == MLX5_VDPA_EVENT_MODE_ONLY_INTERRUPT) {
+ mlx5_vdpa_cq_arm(priv, cq);
+ return;
+ }
+ /* Don't arm again - timer will take control. */
+ DRV_LOG(DEBUG, "Device %s virtq %d cq %d event was captured."
+ " Timer is %s, cq ci is %u.\n",
+ priv->vdev->device->name,
+ (int)virtq->index, cq->cq->id,
+ priv->timer_on ? "on" : "off", cq->cq_ci);
+ cq->armed = 0;
}
-#endif /* HAVE_IBV_DEVX_ASYNC */
+#endif
+
+ /* Traffic detected: make sure timer is on. */
+ priv->last_traffic_tic = rte_rdtsc();
+ pthread_mutex_lock(&priv->timer_lock);
+ if (!priv->timer_on) {
+ priv->timer_on = 1;
+ pthread_cond_signal(&priv->timer_cond);
+ }
+ pthread_mutex_unlock(&priv->timer_lock);
}
int
mlx5_vdpa_cqe_event_setup(struct mlx5_vdpa_priv *priv)
{
- int flags = fcntl(priv->eventc->fd, F_GETFL);
- int ret = fcntl(priv->eventc->fd, F_SETFL, flags | O_NONBLOCK);
+ int flags;
+ int ret;
+
+ if (!priv->eventc)
+ /* All virtqs are in poll mode. */
+ return 0;
+ if (priv->event_mode != MLX5_VDPA_EVENT_MODE_ONLY_INTERRUPT) {
+ pthread_mutex_init(&priv->timer_lock, NULL);
+ pthread_cond_init(&priv->timer_cond, NULL);
+ priv->timer_on = 0;
+ ret = pthread_create(&priv->timer_tid, NULL,
+ mlx5_vdpa_poll_handle, (void *)priv);
+ if (ret) {
+ DRV_LOG(ERR, "Failed to create timer thread.");
+ return -1;
+ }
+ }
+ flags = fcntl(priv->eventc->fd, F_GETFL);
+ ret = fcntl(priv->eventc->fd, F_SETFL, flags | O_NONBLOCK);
if (ret) {
DRV_LOG(ERR, "Failed to change event channel FD.");
- rte_errno = errno;
- return -rte_errno;
+ goto error;
}
priv->intr_handle.fd = priv->eventc->fd;
priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
mlx5_vdpa_interrupt_handler, priv)) {
priv->intr_handle.fd = 0;
DRV_LOG(ERR, "Failed to register CQE interrupt %d.", rte_errno);
- return -rte_errno;
+ goto error;
}
return 0;
+error:
+ mlx5_vdpa_cqe_event_unset(priv);
+ return -1;
}
void
{
int retries = MLX5_VDPA_INTR_RETRIES;
int ret = -EAGAIN;
+ void *status;
if (priv->intr_handle.fd) {
while (retries-- && ret == -EAGAIN) {
DRV_LOG(DEBUG, "Try again to unregister fd %d "
"of CQ interrupt, retries = %d.",
priv->intr_handle.fd, retries);
- usleep(MLX5_VDPA_INTR_RETRIES_USEC);
+ rte_pause();
}
}
memset(&priv->intr_handle, 0, sizeof(priv->intr_handle));
}
+ if (priv->timer_tid) {
+ pthread_cancel(priv->timer_tid);
+ pthread_join(priv->timer_tid, &status);
+ }
+ priv->timer_tid = 0;
}
void
git.droids-corp.org / dpdk.git / blobdiff