* Tx queues configuration for mlx4 driver.
*/
-#include <assert.h>
#include <errno.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
+#include <sys/mman.h>
#include <inttypes.h>
+#include <unistd.h>
/* Verbs headers do not support -pedantic. */
#ifdef PEDANTIC
#include "mlx4_rxtx.h"
#include "mlx4_utils.h"
+/**
+ * Initialize Tx UAR registers for primary process.
+ *
+ * @param txq
+ * Pointer to Tx queue structure.
+ */
+static void
+txq_uar_init(struct txq *txq)
+{
+ struct mlx4_priv *priv = txq->priv;
+ struct mlx4_proc_priv *ppriv = MLX4_PROC_PRIV(PORT_ID(priv));
+
+ MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY);
+ MLX4_ASSERT(ppriv);
+ ppriv->uar_table[txq->stats.idx] = txq->msq.db;
+}
+
+#ifdef HAVE_IBV_MLX4_UAR_MMAP_OFFSET
+/**
+ * Remap UAR register of a Tx queue for secondary process.
+ *
+ * Remapped address is stored at the table in the process private structure of
+ * the device, indexed by queue index.
+ *
+ * @param txq
+ * Pointer to Tx queue structure.
+ * @param fd
+ * Verbs file descriptor to map UAR pages.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+txq_uar_init_secondary(struct txq *txq, int fd)
+{
+ struct mlx4_priv *priv = txq->priv;
+ struct mlx4_proc_priv *ppriv = MLX4_PROC_PRIV(PORT_ID(priv));
+ void *addr;
+ uintptr_t uar_va;
+ uintptr_t offset;
+ const size_t page_size = sysconf(_SC_PAGESIZE);
+
+ MLX4_ASSERT(ppriv);
+ /*
+ * As rdma-core, UARs are mapped in size of OS page
+ * size. Ref to libmlx4 function: mlx4_init_context()
+ */
+ uar_va = (uintptr_t)txq->msq.db;
+ offset = uar_va & (page_size - 1); /* Offset in page. */
+ addr = mmap(NULL, page_size, PROT_WRITE, MAP_SHARED, fd,
+ txq->msq.uar_mmap_offset);
+ if (addr == MAP_FAILED) {
+ ERROR("port %u mmap failed for BF reg of txq %u",
+ txq->port_id, txq->stats.idx);
+ rte_errno = ENXIO;
+ return -rte_errno;
+ }
+ addr = RTE_PTR_ADD(addr, offset);
+ ppriv->uar_table[txq->stats.idx] = addr;
+ return 0;
+}
+
+/**
+ * Unmap UAR register of a Tx queue for secondary process.
+ *
+ * @param txq
+ * Pointer to Tx queue structure.
+ */
+static void
+txq_uar_uninit_secondary(struct txq *txq)
+{
+ struct mlx4_proc_priv *ppriv = MLX4_PROC_PRIV(PORT_ID(txq->priv));
+ const size_t page_size = sysconf(_SC_PAGESIZE);
+ void *addr;
+
+ addr = ppriv->uar_table[txq->stats.idx];
+ munmap(RTE_PTR_ALIGN_FLOOR(addr, page_size), page_size);
+}
+
+/**
+ * Initialize Tx UAR registers for secondary process.
+ *
+ * @param dev
+ * Pointer to Ethernet device.
+ * @param fd
+ * Verbs file descriptor to map UAR pages.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx4_tx_uar_init_secondary(struct rte_eth_dev *dev, int fd)
+{
+ const unsigned int txqs_n = dev->data->nb_tx_queues;
+ struct txq *txq;
+ unsigned int i;
+ int ret;
+
+ MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_SECONDARY);
+ for (i = 0; i != txqs_n; ++i) {
+ txq = dev->data->tx_queues[i];
+ if (!txq)
+ continue;
+ MLX4_ASSERT(txq->stats.idx == (uint16_t)i);
+ ret = txq_uar_init_secondary(txq, fd);
+ if (ret)
+ goto error;
+ }
+ return 0;
+error:
+ /* Rollback. */
+ do {
+ txq = dev->data->tx_queues[i];
+ if (!txq)
+ continue;
+ txq_uar_uninit_secondary(txq);
+ } while (i--);
+ return -rte_errno;
+}
+#else
+int
+mlx4_tx_uar_init_secondary(struct rte_eth_dev *dev __rte_unused,
+ int fd __rte_unused)
+{
+ MLX4_ASSERT(rte_eal_process_type() == RTE_PROC_SECONDARY);
+ ERROR("UAR remap is not supported");
+ rte_errno = ENOTSUP;
+ return -rte_errno;
+}
+#endif
+
/**
* Free Tx queue elements.
*
while (elts_tail != elts_head) {
struct txq_elt *elt = &(*elts)[elts_tail++ & elts_m];
- assert(elt->buf != NULL);
+ MLX4_ASSERT(elt->buf != NULL);
rte_pktmbuf_free(elt->buf);
elt->buf = NULL;
elt->wqe = NULL;
sq->owner_opcode = MLX4_OPCODE_SEND | (0u << MLX4_SQ_OWNER_BIT);
sq->stamp = rte_cpu_to_be_32(MLX4_SQ_STAMP_VAL |
(0u << MLX4_SQ_OWNER_BIT));
+#ifdef HAVE_IBV_MLX4_UAR_MMAP_OFFSET
+ sq->uar_mmap_offset = dqp->uar_mmap_offset;
+#else
+ sq->uar_mmap_offset = -1; /* Make mmap() fail. */
+#endif
sq->db = dqp->sdb;
sq->doorbell_qpn = dqp->doorbell_qpn;
cq->buf = dcq->buf.buf;
}
*txq = (struct txq){
.priv = priv,
+ .port_id = dev->data->port_id,
.stats = {
.idx = idx,
},
goto error;
}
/* Retrieve device queue information. */
+#ifdef HAVE_IBV_MLX4_UAR_MMAP_OFFSET
+ dv_qp = (struct mlx4dv_qp){
+ .comp_mask = MLX4DV_QP_MASK_UAR_MMAP_OFFSET,
+ };
+#endif
mlxdv.cq.in = txq->cq;
mlxdv.cq.out = &dv_cq;
mlxdv.qp.in = txq->qp;
" accessing the device queues", (void *)dev);
goto error;
}
+#ifdef HAVE_IBV_MLX4_UAR_MMAP_OFFSET
+ if (!(dv_qp.comp_mask & MLX4DV_QP_MASK_UAR_MMAP_OFFSET)) {
+ WARN("%p: failed to obtain UAR mmap offset", (void *)dev);
+ dv_qp.uar_mmap_offset = -1; /* Make mmap() fail. */
+ }
+#endif
mlx4_txq_fill_dv_obj_info(txq, &mlxdv);
+ txq_uar_init(txq);
/* Save first wqe pointer in the first element. */
(&(*txq->elts)[0])->wqe =
(volatile struct mlx4_wqe_ctrl_seg *)txq->msq.buf;
ret = rte_errno;
mlx4_tx_queue_release(txq);
rte_errno = ret;
- assert(rte_errno > 0);
+ MLX4_ASSERT(rte_errno > 0);
priv->verbs_alloc_ctx.type = MLX4_VERBS_ALLOC_TYPE_NONE;
return -rte_errno;
}
git.droids-corp.org / dpdk.git / blobdiff