| // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB |
| /* Copyright (c) 2020 Mellanox Technologies Ltd. */ |
| |
| #include <linux/vdpa.h> |
| #include <uapi/linux/virtio_ids.h> |
| #include <linux/virtio_config.h> |
| #include <linux/mlx5/qp.h> |
| #include <linux/mlx5/device.h> |
| #include <linux/mlx5/vport.h> |
| #include <linux/mlx5/fs.h> |
| #include <linux/mlx5/device.h> |
| #include "mlx5_vnet.h" |
| #include "mlx5_vdpa_ifc.h" |
| #include "mlx5_vdpa.h" |
| |
| #define to_mvdev(__vdev) container_of((__vdev), struct mlx5_vdpa_dev, vdev) |
| |
| #define VALID_FEATURES_MASK \ |
| (BIT_ULL(VIRTIO_NET_F_CSUM) | BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) | \ |
| BIT_ULL(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) | BIT_ULL(VIRTIO_NET_F_MTU) | BIT_ULL(VIRTIO_NET_F_MAC) | \ |
| BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) | BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) | \ |
| BIT_ULL(VIRTIO_NET_F_GUEST_ECN) | BIT_ULL(VIRTIO_NET_F_GUEST_UFO) | BIT_ULL(VIRTIO_NET_F_HOST_TSO4) | \ |
| BIT_ULL(VIRTIO_NET_F_HOST_TSO6) | BIT_ULL(VIRTIO_NET_F_HOST_ECN) | BIT_ULL(VIRTIO_NET_F_HOST_UFO) | \ |
| BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) | BIT_ULL(VIRTIO_NET_F_STATUS) | BIT_ULL(VIRTIO_NET_F_CTRL_VQ) | \ |
| BIT_ULL(VIRTIO_NET_F_CTRL_RX) | BIT_ULL(VIRTIO_NET_F_CTRL_VLAN) | \ |
| BIT_ULL(VIRTIO_NET_F_CTRL_RX_EXTRA) | BIT_ULL(VIRTIO_NET_F_GUEST_ANNOUNCE) | \ |
| BIT_ULL(VIRTIO_NET_F_MQ) | BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) | BIT_ULL(VIRTIO_NET_F_HASH_REPORT) | \ |
| BIT_ULL(VIRTIO_NET_F_RSS) | BIT_ULL(VIRTIO_NET_F_RSC_EXT) | BIT_ULL(VIRTIO_NET_F_STANDBY) | \ |
| BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX) | BIT_ULL(VIRTIO_F_NOTIFY_ON_EMPTY) | \ |
| BIT_ULL(VIRTIO_F_ANY_LAYOUT) | BIT_ULL(VIRTIO_F_VERSION_1) | BIT_ULL(VIRTIO_F_ACCESS_PLATFORM) | \ |
| BIT_ULL(VIRTIO_F_RING_PACKED) | BIT_ULL(VIRTIO_F_ORDER_PLATFORM) | BIT_ULL(VIRTIO_F_SR_IOV)) |
| |
| #define VALID_STATUS_MASK \ |
| (VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_DRIVER_OK | \ |
| VIRTIO_CONFIG_S_FEATURES_OK | VIRTIO_CONFIG_S_NEEDS_RESET | VIRTIO_CONFIG_S_FAILED) |
| |
| struct mlx5_vdpa_net_resources { |
| u32 tisn; |
| u32 tdn; |
| u32 tirn; |
| u32 rqtn; |
| bool valid; |
| }; |
| |
| struct mlx5_vdpa_cq_buf { |
| struct mlx5_frag_buf_ctrl fbc; |
| struct mlx5_frag_buf frag_buf; |
| int cqe_size; |
| int nent; |
| }; |
| |
| struct mlx5_vdpa_cq { |
| struct mlx5_core_cq mcq; |
| struct mlx5_vdpa_cq_buf buf; |
| struct mlx5_db db; |
| int cqe; |
| }; |
| |
| struct mlx5_vdpa_umem { |
| struct mlx5_frag_buf_ctrl fbc; |
| struct mlx5_frag_buf frag_buf; |
| int size; |
| u32 id; |
| }; |
| |
| struct mlx5_vdpa_qp { |
| struct mlx5_core_qp mqp; |
| struct mlx5_frag_buf frag_buf; |
| struct mlx5_db db; |
| u16 head; |
| bool fw; |
| }; |
| |
| struct mlx5_vq_restore_info { |
| u32 num_ent; |
| u64 desc_addr; |
| u64 device_addr; |
| u64 driver_addr; |
| u16 avail_index; |
| bool ready; |
| struct vdpa_callback cb; |
| bool restore; |
| }; |
| |
| struct mlx5_vdpa_virtqueue { |
| bool ready; |
| u64 desc_addr; |
| u64 device_addr; |
| u64 driver_addr; |
| u32 num_ent; |
| struct vdpa_callback event_cb; |
| |
| /* Resources for implementing the notification channel from the device |
| * to the driver. fwqp is the firmware end of an RC connection; the |
| * other end is vqqp used by the driver. cq is is where completions are |
| * reported. |
| */ |
| struct mlx5_vdpa_cq cq; |
| struct mlx5_vdpa_qp fwqp; |
| struct mlx5_vdpa_qp vqqp; |
| |
| /* umem resources are required for the virtqueue operation. They're use |
| * is internal and they must be provided by the driver. |
| */ |
| struct mlx5_vdpa_umem umem1; |
| struct mlx5_vdpa_umem umem2; |
| struct mlx5_vdpa_umem umem3; |
| |
| bool initialized; |
| int index; |
| u32 virtq_id; |
| struct mlx5_vdpa_net *ndev; |
| u16 avail_idx; |
| int fw_state; |
| |
| /* keep last in the struct */ |
| struct mlx5_vq_restore_info ri; |
| }; |
| |
| /* We will remove this limitation once mlx5_vdpa_alloc_resources() |
| * provides for driver space allocation |
| */ |
| #define MLX5_MAX_SUPPORTED_VQS 16 |
| |
| struct mlx5_vdpa_net { |
| struct mlx5_vdpa_dev mvdev; |
| struct mlx5_vdpa_net_resources res; |
| struct virtio_net_config config; |
| struct mlx5_vdpa_virtqueue vqs[MLX5_MAX_SUPPORTED_VQS]; |
| |
| /* Serialize vq resources creation and destruction. This is required |
| * since memory map might change and we need to destroy and create |
| * resources while driver in operational. |
| */ |
| struct mutex reslock; |
| struct mlx5_flow_table *rxft; |
| struct mlx5_fc *rx_counter; |
| struct mlx5_flow_handle *rx_rule; |
| bool setup; |
| u16 mtu; |
| }; |
| |
| static void free_resources(struct mlx5_vdpa_net *ndev); |
| static void init_mvqs(struct mlx5_vdpa_net *ndev); |
| static int setup_driver(struct mlx5_vdpa_net *ndev); |
| static void teardown_driver(struct mlx5_vdpa_net *ndev); |
| |
| static bool mlx5_vdpa_debug; |
| |
| #define MLX5_LOG_VIO_FLAG(_feature) \ |
| do { \ |
| if (features & BIT_ULL(_feature)) \ |
| mlx5_vdpa_info(mvdev, "%s\n", #_feature); \ |
| } while (0) |
| |
| #define MLX5_LOG_VIO_STAT(_status) \ |
| do { \ |
| if (status & (_status)) \ |
| mlx5_vdpa_info(mvdev, "%s\n", #_status); \ |
| } while (0) |
| |
| static void print_status(struct mlx5_vdpa_dev *mvdev, u8 status, bool set) |
| { |
| if (status & ~VALID_STATUS_MASK) |
| mlx5_vdpa_warn(mvdev, "Warning: there are invalid status bits 0x%x\n", |
| status & ~VALID_STATUS_MASK); |
| |
| if (!mlx5_vdpa_debug) |
| return; |
| |
| mlx5_vdpa_info(mvdev, "driver status %s", set ? "set" : "get"); |
| if (set && !status) { |
| mlx5_vdpa_info(mvdev, "driver resets the device\n"); |
| return; |
| } |
| |
| MLX5_LOG_VIO_STAT(VIRTIO_CONFIG_S_ACKNOWLEDGE); |
| MLX5_LOG_VIO_STAT(VIRTIO_CONFIG_S_DRIVER); |
| MLX5_LOG_VIO_STAT(VIRTIO_CONFIG_S_DRIVER_OK); |
| MLX5_LOG_VIO_STAT(VIRTIO_CONFIG_S_FEATURES_OK); |
| MLX5_LOG_VIO_STAT(VIRTIO_CONFIG_S_NEEDS_RESET); |
| MLX5_LOG_VIO_STAT(VIRTIO_CONFIG_S_FAILED); |
| } |
| |
| static void print_features(struct mlx5_vdpa_dev *mvdev, u64 features, bool set) |
| { |
| if (features & ~VALID_FEATURES_MASK) |
| mlx5_vdpa_warn(mvdev, "There are invalid feature bits 0x%llx\n", |
| features & ~VALID_FEATURES_MASK); |
| |
| if (!mlx5_vdpa_debug) |
| return; |
| |
| mlx5_vdpa_info(mvdev, "driver %s feature bits:\n", set ? "sets" : "reads"); |
| if (!features) |
| mlx5_vdpa_info(mvdev, "all feature bits are cleared\n"); |
| |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_CSUM); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_GUEST_CSUM); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_MTU); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_MAC); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_GUEST_TSO4); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_GUEST_TSO6); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_GUEST_ECN); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_GUEST_UFO); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_HOST_TSO4); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_HOST_TSO6); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_HOST_ECN); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_HOST_UFO); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_MRG_RXBUF); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_STATUS); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_CTRL_VQ); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_CTRL_RX); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_CTRL_VLAN); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_CTRL_RX_EXTRA); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_GUEST_ANNOUNCE); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_MQ); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_CTRL_MAC_ADDR); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_HASH_REPORT); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_RSS); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_RSC_EXT); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_STANDBY); |
| MLX5_LOG_VIO_FLAG(VIRTIO_NET_F_SPEED_DUPLEX); |
| MLX5_LOG_VIO_FLAG(VIRTIO_F_NOTIFY_ON_EMPTY); |
| MLX5_LOG_VIO_FLAG(VIRTIO_F_ANY_LAYOUT); |
| MLX5_LOG_VIO_FLAG(VIRTIO_F_VERSION_1); |
| MLX5_LOG_VIO_FLAG(VIRTIO_F_ACCESS_PLATFORM); |
| MLX5_LOG_VIO_FLAG(VIRTIO_F_RING_PACKED); |
| MLX5_LOG_VIO_FLAG(VIRTIO_F_ORDER_PLATFORM); |
| MLX5_LOG_VIO_FLAG(VIRTIO_F_SR_IOV); |
| } |
| |
| static int create_tis(struct mlx5_vdpa_net *ndev) |
| { |
| struct mlx5_vdpa_dev *mvdev = &ndev->mvdev; |
| u32 in[MLX5_ST_SZ_DW(create_tis_in)] = {}; |
| void *tisc; |
| int err; |
| |
| tisc = MLX5_ADDR_OF(create_tis_in, in, ctx); |
| MLX5_SET(tisc, tisc, transport_domain, ndev->res.tdn); |
| err = mlx5_vdpa_create_tis(mvdev, in, &ndev->res.tisn); |
| if (err) |
| mlx5_vdpa_warn(mvdev, "create TIS (%d)\n", err); |
| |
| return err; |
| } |
| |
| static void destroy_tis(struct mlx5_vdpa_net *ndev) |
| { |
| mlx5_vdpa_destroy_tis(&ndev->mvdev, ndev->res.tisn); |
| } |
| |
| #define MLX5_VDPA_CQE_SIZE 64 |
| #define MLX5_VDPA_LOG_CQE_SIZE ilog2(MLX5_VDPA_CQE_SIZE) |
| |
| static int cq_frag_buf_alloc(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_cq_buf *buf, int nent) |
| { |
| struct mlx5_frag_buf *frag_buf = &buf->frag_buf; |
| u8 log_wq_stride = MLX5_VDPA_LOG_CQE_SIZE; |
| u8 log_wq_sz = MLX5_VDPA_LOG_CQE_SIZE; |
| int err; |
| |
| err = mlx5_frag_buf_alloc_node(ndev->mvdev.mdev, nent * MLX5_VDPA_CQE_SIZE, frag_buf, |
| ndev->mvdev.mdev->priv.numa_node); |
| if (err) |
| return err; |
| |
| mlx5_init_fbc(frag_buf->frags, log_wq_stride, log_wq_sz, &buf->fbc); |
| |
| buf->cqe_size = MLX5_VDPA_CQE_SIZE; |
| buf->nent = nent; |
| |
| return 0; |
| } |
| |
| static int umem_frag_buf_alloc(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_umem *umem, int size) |
| { |
| struct mlx5_frag_buf *frag_buf = &umem->frag_buf; |
| |
| return mlx5_frag_buf_alloc_node(ndev->mvdev.mdev, size, frag_buf, |
| ndev->mvdev.mdev->priv.numa_node); |
| } |
| |
| static void cq_frag_buf_free(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_cq_buf *buf) |
| { |
| mlx5_frag_buf_free(ndev->mvdev.mdev, &buf->frag_buf); |
| } |
| |
| static void *get_cqe(struct mlx5_vdpa_cq *vcq, int n) |
| { |
| return mlx5_frag_buf_get_wqe(&vcq->buf.fbc, n); |
| } |
| |
| static void cq_frag_buf_init(struct mlx5_vdpa_cq *vcq, struct mlx5_vdpa_cq_buf *buf) |
| { |
| struct mlx5_cqe64 *cqe64; |
| void *cqe; |
| int i; |
| |
| for (i = 0; i < buf->nent; i++) { |
| cqe = get_cqe(vcq, i); |
| cqe64 = cqe; |
| cqe64->op_own = MLX5_CQE_INVALID << 4; |
| } |
| } |
| |
| static void *get_sw_cqe(struct mlx5_vdpa_cq *cq, int n) |
| { |
| struct mlx5_cqe64 *cqe64 = get_cqe(cq, n & (cq->cqe - 1)); |
| |
| if (likely(get_cqe_opcode(cqe64) != MLX5_CQE_INVALID) && |
| !((cqe64->op_own & MLX5_CQE_OWNER_MASK) ^ !!(n & cq->cqe))) |
| return cqe64; |
| |
| return NULL; |
| } |
| |
| static void rx_post(struct mlx5_vdpa_qp *vqp, int n) |
| { |
| vqp->head += n; |
| vqp->db.db[0] = cpu_to_be32(vqp->head); |
| } |
| |
| static void qp_prepare(struct mlx5_vdpa_net *ndev, bool fw, void *in, |
| struct mlx5_vdpa_virtqueue *mvq, u32 num_ent) |
| { |
| struct mlx5_vdpa_qp *vqp; |
| __be64 *pas; |
| void *qpc; |
| |
| vqp = fw ? &mvq->fwqp : &mvq->vqqp; |
| MLX5_SET(create_qp_in, in, uid, ndev->mvdev.res.uid); |
| qpc = MLX5_ADDR_OF(create_qp_in, in, qpc); |
| if (vqp->fw) { |
| /* Firmware QP is allocated by the driver for the firmware's |
| * use so we can skip part of the params as they will be chosen by firmware |
| */ |
| qpc = MLX5_ADDR_OF(create_qp_in, in, qpc); |
| MLX5_SET(qpc, qpc, rq_type, MLX5_ZERO_LEN_RQ); |
| MLX5_SET(qpc, qpc, no_sq, 1); |
| return; |
| } |
| |
| MLX5_SET(qpc, qpc, st, MLX5_QP_ST_RC); |
| MLX5_SET(qpc, qpc, pm_state, MLX5_QP_PM_MIGRATED); |
| MLX5_SET(qpc, qpc, pd, ndev->mvdev.res.pdn); |
| MLX5_SET(qpc, qpc, mtu, MLX5_QPC_MTU_256_BYTES); |
| MLX5_SET(qpc, qpc, uar_page, ndev->mvdev.res.uar->index); |
| MLX5_SET(qpc, qpc, log_page_size, vqp->frag_buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT); |
| MLX5_SET(qpc, qpc, no_sq, 1); |
| MLX5_SET(qpc, qpc, cqn_rcv, mvq->cq.mcq.cqn); |
| MLX5_SET(qpc, qpc, log_rq_size, ilog2(num_ent)); |
| MLX5_SET(qpc, qpc, rq_type, MLX5_NON_ZERO_RQ); |
| pas = (__be64 *)MLX5_ADDR_OF(create_qp_in, in, pas); |
| mlx5_fill_page_frag_array(&vqp->frag_buf, pas); |
| } |
| |
| static int rq_buf_alloc(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_qp *vqp, u32 num_ent) |
| { |
| return mlx5_frag_buf_alloc_node(ndev->mvdev.mdev, |
| num_ent * sizeof(struct mlx5_wqe_data_seg), &vqp->frag_buf, |
| ndev->mvdev.mdev->priv.numa_node); |
| } |
| |
| static void rq_buf_free(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_qp *vqp) |
| { |
| mlx5_frag_buf_free(ndev->mvdev.mdev, &vqp->frag_buf); |
| } |
| |
| static int qp_create(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq, |
| struct mlx5_vdpa_qp *vqp) |
| { |
| struct mlx5_core_dev *mdev = ndev->mvdev.mdev; |
| int inlen = MLX5_ST_SZ_BYTES(create_qp_in); |
| u32 out[MLX5_ST_SZ_DW(create_qp_out)] = {}; |
| void *qpc; |
| void *in; |
| int err; |
| |
| if (!vqp->fw) { |
| vqp = &mvq->vqqp; |
| err = rq_buf_alloc(ndev, vqp, mvq->num_ent); |
| if (err) |
| return err; |
| |
| err = mlx5_db_alloc(ndev->mvdev.mdev, &vqp->db); |
| if (err) |
| goto err_db; |
| inlen += vqp->frag_buf.npages * sizeof(__be64); |
| } |
| |
| in = kzalloc(inlen, GFP_KERNEL); |
| if (!in) { |
| err = -ENOMEM; |
| goto err_kzalloc; |
| } |
| |
| qp_prepare(ndev, vqp->fw, in, mvq, mvq->num_ent); |
| qpc = MLX5_ADDR_OF(create_qp_in, in, qpc); |
| MLX5_SET(qpc, qpc, st, MLX5_QP_ST_RC); |
| MLX5_SET(qpc, qpc, pm_state, MLX5_QP_PM_MIGRATED); |
| MLX5_SET(qpc, qpc, pd, ndev->mvdev.res.pdn); |
| MLX5_SET(qpc, qpc, mtu, MLX5_QPC_MTU_256_BYTES); |
| if (!vqp->fw) |
| MLX5_SET64(qpc, qpc, dbr_addr, vqp->db.dma); |
| MLX5_SET(create_qp_in, in, opcode, MLX5_CMD_OP_CREATE_QP); |
| err = mlx5_cmd_exec(mdev, in, inlen, out, sizeof(out)); |
| kfree(in); |
| if (err) |
| goto err_kzalloc; |
| |
| vqp->mqp.uid = ndev->mvdev.res.uid; |
| vqp->mqp.qpn = MLX5_GET(create_qp_out, out, qpn); |
| |
| if (!vqp->fw) |
| rx_post(vqp, mvq->num_ent); |
| |
| return 0; |
| |
| err_kzalloc: |
| if (!vqp->fw) |
| mlx5_db_free(ndev->mvdev.mdev, &vqp->db); |
| err_db: |
| if (!vqp->fw) |
| rq_buf_free(ndev, vqp); |
| |
| return err; |
| } |
| |
| static void qp_destroy(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_qp *vqp) |
| { |
| u32 in[MLX5_ST_SZ_DW(destroy_qp_in)] = {}; |
| |
| MLX5_SET(destroy_qp_in, in, opcode, MLX5_CMD_OP_DESTROY_QP); |
| MLX5_SET(destroy_qp_in, in, qpn, vqp->mqp.qpn); |
| MLX5_SET(destroy_qp_in, in, uid, ndev->mvdev.res.uid); |
| if (mlx5_cmd_exec_in(ndev->mvdev.mdev, destroy_qp, in)) |
| mlx5_vdpa_warn(&ndev->mvdev, "destroy qp 0x%x\n", vqp->mqp.qpn); |
| if (!vqp->fw) { |
| mlx5_db_free(ndev->mvdev.mdev, &vqp->db); |
| rq_buf_free(ndev, vqp); |
| } |
| } |
| |
| static void *next_cqe_sw(struct mlx5_vdpa_cq *cq) |
| { |
| return get_sw_cqe(cq, cq->mcq.cons_index); |
| } |
| |
| static int mlx5_vdpa_poll_one(struct mlx5_vdpa_cq *vcq) |
| { |
| struct mlx5_cqe64 *cqe64; |
| |
| cqe64 = next_cqe_sw(vcq); |
| if (!cqe64) |
| return -EAGAIN; |
| |
| vcq->mcq.cons_index++; |
| return 0; |
| } |
| |
| static void mlx5_vdpa_handle_completions(struct mlx5_vdpa_virtqueue *mvq, int num) |
| { |
| mlx5_cq_set_ci(&mvq->cq.mcq); |
| rx_post(&mvq->vqqp, num); |
| if (mvq->event_cb.callback) |
| mvq->event_cb.callback(mvq->event_cb.private); |
| } |
| |
| static void mlx5_vdpa_cq_comp(struct mlx5_core_cq *mcq, struct mlx5_eqe *eqe) |
| { |
| struct mlx5_vdpa_virtqueue *mvq = container_of(mcq, struct mlx5_vdpa_virtqueue, cq.mcq); |
| struct mlx5_vdpa_net *ndev = mvq->ndev; |
| void __iomem *uar_page = ndev->mvdev.res.uar->map; |
| int num = 0; |
| |
| while (!mlx5_vdpa_poll_one(&mvq->cq)) { |
| num++; |
| if (num > mvq->num_ent / 2) { |
| /* If completions keep coming while we poll, we want to |
| * let the hardware know that we consumed them by |
| * updating the doorbell record. We also let vdpa core |
| * know about this so it passes it on the virtio driver |
| * on the guest. |
| */ |
| mlx5_vdpa_handle_completions(mvq, num); |
| num = 0; |
| } |
| } |
| |
| if (num) |
| mlx5_vdpa_handle_completions(mvq, num); |
| |
| mlx5_cq_arm(&mvq->cq.mcq, MLX5_CQ_DB_REQ_NOT, uar_page, mvq->cq.mcq.cons_index); |
| } |
| |
| static int cq_create(struct mlx5_vdpa_net *ndev, u16 idx, u32 num_ent) |
| { |
| struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx]; |
| struct mlx5_core_dev *mdev = ndev->mvdev.mdev; |
| void __iomem *uar_page = ndev->mvdev.res.uar->map; |
| u32 out[MLX5_ST_SZ_DW(create_cq_out)]; |
| struct mlx5_vdpa_cq *vcq = &mvq->cq; |
| unsigned int irqn; |
| __be64 *pas; |
| int inlen; |
| void *cqc; |
| void *in; |
| int err; |
| int eqn; |
| |
| err = mlx5_db_alloc(mdev, &vcq->db); |
| if (err) |
| return err; |
| |
| vcq->mcq.set_ci_db = vcq->db.db; |
| vcq->mcq.arm_db = vcq->db.db + 1; |
| vcq->mcq.cqe_sz = 64; |
| |
| err = cq_frag_buf_alloc(ndev, &vcq->buf, num_ent); |
| if (err) |
| goto err_db; |
| |
| cq_frag_buf_init(vcq, &vcq->buf); |
| |
| inlen = MLX5_ST_SZ_BYTES(create_cq_in) + |
| MLX5_FLD_SZ_BYTES(create_cq_in, pas[0]) * vcq->buf.frag_buf.npages; |
| in = kzalloc(inlen, GFP_KERNEL); |
| if (!in) { |
| err = -ENOMEM; |
| goto err_vzalloc; |
| } |
| |
| MLX5_SET(create_cq_in, in, uid, ndev->mvdev.res.uid); |
| pas = (__be64 *)MLX5_ADDR_OF(create_cq_in, in, pas); |
| mlx5_fill_page_frag_array(&vcq->buf.frag_buf, pas); |
| |
| cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context); |
| MLX5_SET(cqc, cqc, log_page_size, vcq->buf.frag_buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT); |
| |
| /* Use vector 0 by default. Consider adding code to choose least used |
| * vector. |
| */ |
| err = mlx5_vector2eqn(mdev, 0, &eqn, &irqn); |
| if (err) |
| goto err_vec; |
| |
| cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context); |
| MLX5_SET(cqc, cqc, log_cq_size, ilog2(num_ent)); |
| MLX5_SET(cqc, cqc, uar_page, ndev->mvdev.res.uar->index); |
| MLX5_SET(cqc, cqc, c_eqn, eqn); |
| MLX5_SET64(cqc, cqc, dbr_addr, vcq->db.dma); |
| |
| err = mlx5_core_create_cq(mdev, &vcq->mcq, in, inlen, out, sizeof(out)); |
| if (err) |
| goto err_vec; |
| |
| vcq->mcq.comp = mlx5_vdpa_cq_comp; |
| vcq->cqe = num_ent; |
| vcq->mcq.set_ci_db = vcq->db.db; |
| vcq->mcq.arm_db = vcq->db.db + 1; |
| mlx5_cq_arm(&mvq->cq.mcq, MLX5_CQ_DB_REQ_NOT, uar_page, mvq->cq.mcq.cons_index); |
| kfree(in); |
| return 0; |
| |
| err_vec: |
| kfree(in); |
| err_vzalloc: |
| cq_frag_buf_free(ndev, &vcq->buf); |
| err_db: |
| mlx5_db_free(ndev->mvdev.mdev, &vcq->db); |
| return err; |
| } |
| |
| static void cq_destroy(struct mlx5_vdpa_net *ndev, u16 idx) |
| { |
| struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx]; |
| struct mlx5_core_dev *mdev = ndev->mvdev.mdev; |
| struct mlx5_vdpa_cq *vcq = &mvq->cq; |
| |
| if (mlx5_core_destroy_cq(mdev, &vcq->mcq)) { |
| mlx5_vdpa_warn(&ndev->mvdev, "destroy CQ 0x%x\n", vcq->mcq.cqn); |
| return; |
| } |
| cq_frag_buf_free(ndev, &vcq->buf); |
| mlx5_db_free(ndev->mvdev.mdev, &vcq->db); |
| } |
| |
| static int umem_size(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq, int num, |
| struct mlx5_vdpa_umem **umemp) |
| { |
| struct mlx5_core_dev *mdev = ndev->mvdev.mdev; |
| int p_a; |
| int p_b; |
| |
| switch (num) { |
| case 1: |
| p_a = MLX5_CAP_DEV_VDPA_EMULATION(mdev, umem_1_buffer_param_a); |
| p_b = MLX5_CAP_DEV_VDPA_EMULATION(mdev, umem_1_buffer_param_b); |
| *umemp = &mvq->umem1; |
| break; |
| case 2: |
| p_a = MLX5_CAP_DEV_VDPA_EMULATION(mdev, umem_2_buffer_param_a); |
| p_b = MLX5_CAP_DEV_VDPA_EMULATION(mdev, umem_2_buffer_param_b); |
| *umemp = &mvq->umem2; |
| break; |
| case 3: |
| p_a = MLX5_CAP_DEV_VDPA_EMULATION(mdev, umem_3_buffer_param_a); |
| p_b = MLX5_CAP_DEV_VDPA_EMULATION(mdev, umem_3_buffer_param_b); |
| *umemp = &mvq->umem3; |
| break; |
| } |
| return p_a * mvq->num_ent + p_b; |
| } |
| |
| static void umem_frag_buf_free(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_umem *umem) |
| { |
| mlx5_frag_buf_free(ndev->mvdev.mdev, &umem->frag_buf); |
| } |
| |
| static int create_umem(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq, int num) |
| { |
| int inlen; |
| u32 out[MLX5_ST_SZ_DW(create_umem_out)] = {}; |
| void *um; |
| void *in; |
| int err; |
| __be64 *pas; |
| int size; |
| struct mlx5_vdpa_umem *umem; |
| |
| size = umem_size(ndev, mvq, num, &umem); |
| if (size < 0) |
| return size; |
| |
| umem->size = size; |
| err = umem_frag_buf_alloc(ndev, umem, size); |
| if (err) |
| return err; |
| |
| inlen = MLX5_ST_SZ_BYTES(create_umem_in) + MLX5_ST_SZ_BYTES(mtt) * umem->frag_buf.npages; |
| |
| in = kzalloc(inlen, GFP_KERNEL); |
| if (!in) { |
| err = -ENOMEM; |
| goto err_in; |
| } |
| |
| MLX5_SET(create_umem_in, in, opcode, MLX5_CMD_OP_CREATE_UMEM); |
| MLX5_SET(create_umem_in, in, uid, ndev->mvdev.res.uid); |
| um = MLX5_ADDR_OF(create_umem_in, in, umem); |
| MLX5_SET(umem, um, log_page_size, umem->frag_buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT); |
| MLX5_SET64(umem, um, num_of_mtt, umem->frag_buf.npages); |
| |
| pas = (__be64 *)MLX5_ADDR_OF(umem, um, mtt[0]); |
| mlx5_fill_page_frag_array_perm(&umem->frag_buf, pas, MLX5_MTT_PERM_RW); |
| |
| err = mlx5_cmd_exec(ndev->mvdev.mdev, in, inlen, out, sizeof(out)); |
| if (err) { |
| mlx5_vdpa_warn(&ndev->mvdev, "create umem(%d)\n", err); |
| goto err_cmd; |
| } |
| |
| kfree(in); |
| umem->id = MLX5_GET(create_umem_out, out, umem_id); |
| |
| return 0; |
| |
| err_cmd: |
| kfree(in); |
| err_in: |
| umem_frag_buf_free(ndev, umem); |
| return err; |
| } |
| |
| static void umem_destroy(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq, int num) |
| { |
| u32 in[MLX5_ST_SZ_DW(destroy_umem_in)] = {}; |
| u32 out[MLX5_ST_SZ_DW(destroy_umem_out)] = {}; |
| struct mlx5_vdpa_umem *umem; |
| |
| switch (num) { |
| case 1: |
| umem = &mvq->umem1; |
| break; |
| case 2: |
| umem = &mvq->umem2; |
| break; |
| case 3: |
| umem = &mvq->umem3; |
| break; |
| } |
| |
| MLX5_SET(destroy_umem_in, in, opcode, MLX5_CMD_OP_DESTROY_UMEM); |
| MLX5_SET(destroy_umem_in, in, umem_id, umem->id); |
| if (mlx5_cmd_exec(ndev->mvdev.mdev, in, sizeof(in), out, sizeof(out))) |
| return; |
| |
| umem_frag_buf_free(ndev, umem); |
| } |
| |
| static int umems_create(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq) |
| { |
| int num; |
| int err; |
| |
| for (num = 1; num <= 3; num++) { |
| err = create_umem(ndev, mvq, num); |
| if (err) |
| goto err_umem; |
| } |
| return 0; |
| |
| err_umem: |
| for (num--; num > 0; num--) |
| umem_destroy(ndev, mvq, num); |
| |
| return err; |
| } |
| |
| static void umems_destroy(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq) |
| { |
| int num; |
| |
| for (num = 3; num > 0; num--) |
| umem_destroy(ndev, mvq, num); |
| } |
| |
| static int get_queue_type(struct mlx5_vdpa_net *ndev) |
| { |
| u32 type_mask; |
| |
| type_mask = MLX5_CAP_DEV_VDPA_EMULATION(ndev->mvdev.mdev, virtio_queue_type); |
| |
| /* prefer split queue */ |
| if (type_mask & MLX5_VIRTIO_EMULATION_CAP_VIRTIO_QUEUE_TYPE_PACKED) |
| return MLX5_VIRTIO_EMULATION_VIRTIO_QUEUE_TYPE_PACKED; |
| |
| WARN_ON(!(type_mask & MLX5_VIRTIO_EMULATION_CAP_VIRTIO_QUEUE_TYPE_SPLIT)); |
| |
| return MLX5_VIRTIO_EMULATION_VIRTIO_QUEUE_TYPE_SPLIT; |
| } |
| |
| static bool vq_is_tx(u16 idx) |
| { |
| return idx % 2; |
| } |
| |
| static u16 get_features_12_3(u64 features) |
| { |
| return (!!(features & BIT_ULL(VIRTIO_NET_F_HOST_TSO4)) << 9) | |
| (!!(features & BIT_ULL(VIRTIO_NET_F_HOST_TSO6)) << 8) | |
| (!!(features & BIT_ULL(VIRTIO_NET_F_CSUM)) << 7) | |
| (!!(features & BIT_ULL(VIRTIO_NET_F_GUEST_CSUM)) << 6); |
| } |
| |
| static int create_virtqueue(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq) |
| { |
| int inlen = MLX5_ST_SZ_BYTES(create_virtio_net_q_in); |
| u32 out[MLX5_ST_SZ_DW(create_virtio_net_q_out)] = {}; |
| void *obj_context; |
| void *cmd_hdr; |
| void *vq_ctx; |
| void *in; |
| int err; |
| |
| err = umems_create(ndev, mvq); |
| if (err) |
| return err; |
| |
| in = kzalloc(inlen, GFP_KERNEL); |
| if (!in) { |
| err = -ENOMEM; |
| goto err_alloc; |
| } |
| |
| cmd_hdr = MLX5_ADDR_OF(create_virtio_net_q_in, in, general_obj_in_cmd_hdr); |
| |
| MLX5_SET(general_obj_in_cmd_hdr, cmd_hdr, opcode, MLX5_CMD_OP_CREATE_GENERAL_OBJECT); |
| MLX5_SET(general_obj_in_cmd_hdr, cmd_hdr, obj_type, MLX5_OBJ_TYPE_VIRTIO_NET_Q); |
| MLX5_SET(general_obj_in_cmd_hdr, cmd_hdr, uid, ndev->mvdev.res.uid); |
| |
| obj_context = MLX5_ADDR_OF(create_virtio_net_q_in, in, obj_context); |
| MLX5_SET(virtio_net_q_object, obj_context, hw_available_index, mvq->avail_idx); |
| MLX5_SET(virtio_net_q_object, obj_context, queue_feature_bit_mask_12_3, |
| get_features_12_3(ndev->mvdev.actual_features)); |
| vq_ctx = MLX5_ADDR_OF(virtio_net_q_object, obj_context, virtio_q_context); |
| MLX5_SET(virtio_q, vq_ctx, virtio_q_type, get_queue_type(ndev)); |
| |
| if (vq_is_tx(mvq->index)) |
| MLX5_SET(virtio_net_q_object, obj_context, tisn_or_qpn, ndev->res.tisn); |
| |
| MLX5_SET(virtio_q, vq_ctx, event_mode, MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE); |
| MLX5_SET(virtio_q, vq_ctx, queue_index, mvq->index); |
| MLX5_SET(virtio_q, vq_ctx, event_qpn_or_msix, mvq->fwqp.mqp.qpn); |
| MLX5_SET(virtio_q, vq_ctx, queue_size, mvq->num_ent); |
| MLX5_SET(virtio_q, vq_ctx, virtio_version_1_0, |
| !!(ndev->mvdev.actual_features & VIRTIO_F_VERSION_1)); |
| MLX5_SET64(virtio_q, vq_ctx, desc_addr, mvq->desc_addr); |
| MLX5_SET64(virtio_q, vq_ctx, used_addr, mvq->device_addr); |
| MLX5_SET64(virtio_q, vq_ctx, available_addr, mvq->driver_addr); |
| MLX5_SET(virtio_q, vq_ctx, virtio_q_mkey, ndev->mvdev.mr.mkey.key); |
| MLX5_SET(virtio_q, vq_ctx, umem_1_id, mvq->umem1.id); |
| MLX5_SET(virtio_q, vq_ctx, umem_1_size, mvq->umem1.size); |
| MLX5_SET(virtio_q, vq_ctx, umem_2_id, mvq->umem2.id); |
| MLX5_SET(virtio_q, vq_ctx, umem_2_size, mvq->umem1.size); |
| MLX5_SET(virtio_q, vq_ctx, umem_3_id, mvq->umem3.id); |
| MLX5_SET(virtio_q, vq_ctx, umem_3_size, mvq->umem1.size); |
| MLX5_SET(virtio_q, vq_ctx, pd, ndev->mvdev.res.pdn); |
| if (MLX5_CAP_DEV_VDPA_EMULATION(ndev->mvdev.mdev, eth_frame_offload_type)) |
| MLX5_SET(virtio_q, vq_ctx, virtio_version_1_0, 1); |
| |
| err = mlx5_cmd_exec(ndev->mvdev.mdev, in, inlen, out, sizeof(out)); |
| if (err) |
| goto err_cmd; |
| |
| kfree(in); |
| mvq->virtq_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id); |
| |
| return 0; |
| |
| err_cmd: |
| kfree(in); |
| err_alloc: |
| umems_destroy(ndev, mvq); |
| return err; |
| } |
| |
| static void destroy_virtqueue(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq) |
| { |
| u32 in[MLX5_ST_SZ_DW(destroy_virtio_net_q_in)] = {}; |
| u32 out[MLX5_ST_SZ_DW(destroy_virtio_net_q_out)] = {}; |
| |
| MLX5_SET(destroy_virtio_net_q_in, in, general_obj_out_cmd_hdr.opcode, |
| MLX5_CMD_OP_DESTROY_GENERAL_OBJECT); |
| MLX5_SET(destroy_virtio_net_q_in, in, general_obj_out_cmd_hdr.obj_id, mvq->virtq_id); |
| MLX5_SET(destroy_virtio_net_q_in, in, general_obj_out_cmd_hdr.uid, ndev->mvdev.res.uid); |
| MLX5_SET(destroy_virtio_net_q_in, in, general_obj_out_cmd_hdr.obj_type, |
| MLX5_OBJ_TYPE_VIRTIO_NET_Q); |
| if (mlx5_cmd_exec(ndev->mvdev.mdev, in, sizeof(in), out, sizeof(out))) { |
| mlx5_vdpa_warn(&ndev->mvdev, "destroy virtqueue 0x%x\n", mvq->virtq_id); |
| return; |
| } |
| umems_destroy(ndev, mvq); |
| } |
| |
| static u32 get_rqpn(struct mlx5_vdpa_virtqueue *mvq, bool fw) |
| { |
| return fw ? mvq->vqqp.mqp.qpn : mvq->fwqp.mqp.qpn; |
| } |
| |
| static u32 get_qpn(struct mlx5_vdpa_virtqueue *mvq, bool fw) |
| { |
| return fw ? mvq->fwqp.mqp.qpn : mvq->vqqp.mqp.qpn; |
| } |
| |
| static void alloc_inout(struct mlx5_vdpa_net *ndev, int cmd, void **in, int *inlen, void **out, |
| int *outlen, u32 qpn, u32 rqpn) |
| { |
| void *qpc; |
| void *pp; |
| |
| switch (cmd) { |
| case MLX5_CMD_OP_2RST_QP: |
| *inlen = MLX5_ST_SZ_BYTES(qp_2rst_in); |
| *outlen = MLX5_ST_SZ_BYTES(qp_2rst_out); |
| *in = kzalloc(*inlen, GFP_KERNEL); |
| *out = kzalloc(*outlen, GFP_KERNEL); |
| if (!*in || !*out) |
| goto outerr; |
| |
| MLX5_SET(qp_2rst_in, *in, opcode, cmd); |
| MLX5_SET(qp_2rst_in, *in, uid, ndev->mvdev.res.uid); |
| MLX5_SET(qp_2rst_in, *in, qpn, qpn); |
| break; |
| case MLX5_CMD_OP_RST2INIT_QP: |
| *inlen = MLX5_ST_SZ_BYTES(rst2init_qp_in); |
| *outlen = MLX5_ST_SZ_BYTES(rst2init_qp_out); |
| *in = kzalloc(*inlen, GFP_KERNEL); |
| *out = kzalloc(MLX5_ST_SZ_BYTES(rst2init_qp_out), GFP_KERNEL); |
| if (!*in || !*out) |
| goto outerr; |
| |
| MLX5_SET(rst2init_qp_in, *in, opcode, cmd); |
| MLX5_SET(rst2init_qp_in, *in, uid, ndev->mvdev.res.uid); |
| MLX5_SET(rst2init_qp_in, *in, qpn, qpn); |
| qpc = MLX5_ADDR_OF(rst2init_qp_in, *in, qpc); |
| MLX5_SET(qpc, qpc, remote_qpn, rqpn); |
| MLX5_SET(qpc, qpc, rwe, 1); |
| pp = MLX5_ADDR_OF(qpc, qpc, primary_address_path); |
| MLX5_SET(ads, pp, vhca_port_num, 1); |
| break; |
| case MLX5_CMD_OP_INIT2RTR_QP: |
| *inlen = MLX5_ST_SZ_BYTES(init2rtr_qp_in); |
| *outlen = MLX5_ST_SZ_BYTES(init2rtr_qp_out); |
| *in = kzalloc(*inlen, GFP_KERNEL); |
| *out = kzalloc(MLX5_ST_SZ_BYTES(init2rtr_qp_out), GFP_KERNEL); |
| if (!*in || !*out) |
| goto outerr; |
| |
| MLX5_SET(init2rtr_qp_in, *in, opcode, cmd); |
| MLX5_SET(init2rtr_qp_in, *in, uid, ndev->mvdev.res.uid); |
| MLX5_SET(init2rtr_qp_in, *in, qpn, qpn); |
| qpc = MLX5_ADDR_OF(rst2init_qp_in, *in, qpc); |
| MLX5_SET(qpc, qpc, mtu, MLX5_QPC_MTU_256_BYTES); |
| MLX5_SET(qpc, qpc, log_msg_max, 30); |
| MLX5_SET(qpc, qpc, remote_qpn, rqpn); |
| pp = MLX5_ADDR_OF(qpc, qpc, primary_address_path); |
| MLX5_SET(ads, pp, fl, 1); |
| break; |
| case MLX5_CMD_OP_RTR2RTS_QP: |
| *inlen = MLX5_ST_SZ_BYTES(rtr2rts_qp_in); |
| *outlen = MLX5_ST_SZ_BYTES(rtr2rts_qp_out); |
| *in = kzalloc(*inlen, GFP_KERNEL); |
| *out = kzalloc(MLX5_ST_SZ_BYTES(rtr2rts_qp_out), GFP_KERNEL); |
| if (!*in || !*out) |
| goto outerr; |
| |
| MLX5_SET(rtr2rts_qp_in, *in, opcode, cmd); |
| MLX5_SET(rtr2rts_qp_in, *in, uid, ndev->mvdev.res.uid); |
| MLX5_SET(rtr2rts_qp_in, *in, qpn, qpn); |
| qpc = MLX5_ADDR_OF(rst2init_qp_in, *in, qpc); |
| pp = MLX5_ADDR_OF(qpc, qpc, primary_address_path); |
| MLX5_SET(ads, pp, ack_timeout, 14); |
| MLX5_SET(qpc, qpc, retry_count, 7); |
| MLX5_SET(qpc, qpc, rnr_retry, 7); |
| break; |
| default: |
| goto outerr_nullify; |
| } |
| |
| return; |
| |
| outerr: |
| kfree(*in); |
| kfree(*out); |
| outerr_nullify: |
| *in = NULL; |
| *out = NULL; |
| } |
| |
| static void free_inout(void *in, void *out) |
| { |
| kfree(in); |
| kfree(out); |
| } |
| |
| /* Two QPs are used by each virtqueue. One is used by the driver and one by |
| * firmware. The fw argument indicates whether the subjected QP is the one used |
| * by firmware. |
| */ |
| static int modify_qp(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq, bool fw, int cmd) |
| { |
| int outlen; |
| int inlen; |
| void *out; |
| void *in; |
| int err; |
| |
| alloc_inout(ndev, cmd, &in, &inlen, &out, &outlen, get_qpn(mvq, fw), get_rqpn(mvq, fw)); |
| if (!in || !out) |
| return -ENOMEM; |
| |
| err = mlx5_cmd_exec(ndev->mvdev.mdev, in, inlen, out, outlen); |
| free_inout(in, out); |
| return err; |
| } |
| |
| static int connect_qps(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq) |
| { |
| int err; |
| |
| err = modify_qp(ndev, mvq, true, MLX5_CMD_OP_2RST_QP); |
| if (err) |
| return err; |
| |
| err = modify_qp(ndev, mvq, false, MLX5_CMD_OP_2RST_QP); |
| if (err) |
| return err; |
| |
| err = modify_qp(ndev, mvq, true, MLX5_CMD_OP_RST2INIT_QP); |
| if (err) |
| return err; |
| |
| err = modify_qp(ndev, mvq, false, MLX5_CMD_OP_RST2INIT_QP); |
| if (err) |
| return err; |
| |
| err = modify_qp(ndev, mvq, true, MLX5_CMD_OP_INIT2RTR_QP); |
| if (err) |
| return err; |
| |
| err = modify_qp(ndev, mvq, false, MLX5_CMD_OP_INIT2RTR_QP); |
| if (err) |
| return err; |
| |
| return modify_qp(ndev, mvq, true, MLX5_CMD_OP_RTR2RTS_QP); |
| } |
| |
| struct mlx5_virtq_attr { |
| u8 state; |
| u16 available_index; |
| }; |
| |
| static int query_virtqueue(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq, |
| struct mlx5_virtq_attr *attr) |
| { |
| int outlen = MLX5_ST_SZ_BYTES(query_virtio_net_q_out); |
| u32 in[MLX5_ST_SZ_DW(query_virtio_net_q_in)] = {}; |
| void *out; |
| void *obj_context; |
| void *cmd_hdr; |
| int err; |
| |
| out = kzalloc(outlen, GFP_KERNEL); |
| if (!out) |
| return -ENOMEM; |
| |
| cmd_hdr = MLX5_ADDR_OF(query_virtio_net_q_in, in, general_obj_in_cmd_hdr); |
| |
| MLX5_SET(general_obj_in_cmd_hdr, cmd_hdr, opcode, MLX5_CMD_OP_QUERY_GENERAL_OBJECT); |
| MLX5_SET(general_obj_in_cmd_hdr, cmd_hdr, obj_type, MLX5_OBJ_TYPE_VIRTIO_NET_Q); |
| MLX5_SET(general_obj_in_cmd_hdr, cmd_hdr, obj_id, mvq->virtq_id); |
| MLX5_SET(general_obj_in_cmd_hdr, cmd_hdr, uid, ndev->mvdev.res.uid); |
| err = mlx5_cmd_exec(ndev->mvdev.mdev, in, sizeof(in), out, outlen); |
| if (err) |
| goto err_cmd; |
| |
| obj_context = MLX5_ADDR_OF(query_virtio_net_q_out, out, obj_context); |
| memset(attr, 0, sizeof(*attr)); |
| attr->state = MLX5_GET(virtio_net_q_object, obj_context, state); |
| attr->available_index = MLX5_GET(virtio_net_q_object, obj_context, hw_available_index); |
| kfree(out); |
| return 0; |
| |
| err_cmd: |
| kfree(out); |
| return err; |
| } |
| |
| static int modify_virtqueue(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq, int state) |
| { |
| int inlen = MLX5_ST_SZ_BYTES(modify_virtio_net_q_in); |
| u32 out[MLX5_ST_SZ_DW(modify_virtio_net_q_out)] = {}; |
| void *obj_context; |
| void *cmd_hdr; |
| void *in; |
| int err; |
| |
| in = kzalloc(inlen, GFP_KERNEL); |
| if (!in) |
| return -ENOMEM; |
| |
| cmd_hdr = MLX5_ADDR_OF(modify_virtio_net_q_in, in, general_obj_in_cmd_hdr); |
| |
| MLX5_SET(general_obj_in_cmd_hdr, cmd_hdr, opcode, MLX5_CMD_OP_MODIFY_GENERAL_OBJECT); |
| MLX5_SET(general_obj_in_cmd_hdr, cmd_hdr, obj_type, MLX5_OBJ_TYPE_VIRTIO_NET_Q); |
| MLX5_SET(general_obj_in_cmd_hdr, cmd_hdr, obj_id, mvq->virtq_id); |
| MLX5_SET(general_obj_in_cmd_hdr, cmd_hdr, uid, ndev->mvdev.res.uid); |
| |
| obj_context = MLX5_ADDR_OF(modify_virtio_net_q_in, in, obj_context); |
| MLX5_SET64(virtio_net_q_object, obj_context, modify_field_select, |
| MLX5_VIRTQ_MODIFY_MASK_STATE); |
| MLX5_SET(virtio_net_q_object, obj_context, state, state); |
| err = mlx5_cmd_exec(ndev->mvdev.mdev, in, inlen, out, sizeof(out)); |
| kfree(in); |
| if (!err) |
| mvq->fw_state = state; |
| |
| return err; |
| } |
| |
| static int setup_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq) |
| { |
| u16 idx = mvq->index; |
| int err; |
| |
| if (!mvq->num_ent) |
| return 0; |
| |
| if (mvq->initialized) { |
| mlx5_vdpa_warn(&ndev->mvdev, "attempt re init\n"); |
| return -EINVAL; |
| } |
| |
| err = cq_create(ndev, idx, mvq->num_ent); |
| if (err) |
| return err; |
| |
| err = qp_create(ndev, mvq, &mvq->fwqp); |
| if (err) |
| goto err_fwqp; |
| |
| err = qp_create(ndev, mvq, &mvq->vqqp); |
| if (err) |
| goto err_vqqp; |
| |
| err = connect_qps(ndev, mvq); |
| if (err) |
| goto err_connect; |
| |
| err = create_virtqueue(ndev, mvq); |
| if (err) |
| goto err_connect; |
| |
| if (mvq->ready) { |
| err = modify_virtqueue(ndev, mvq, MLX5_VIRTIO_NET_Q_OBJECT_STATE_RDY); |
| if (err) { |
| mlx5_vdpa_warn(&ndev->mvdev, "failed to modify to ready vq idx %d(%d)\n", |
| idx, err); |
| goto err_connect; |
| } |
| } |
| |
| mvq->initialized = true; |
| return 0; |
| |
| err_connect: |
| qp_destroy(ndev, &mvq->vqqp); |
| err_vqqp: |
| qp_destroy(ndev, &mvq->fwqp); |
| err_fwqp: |
| cq_destroy(ndev, idx); |
| return err; |
| } |
| |
| static void suspend_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq) |
| { |
| struct mlx5_virtq_attr attr; |
| |
| if (!mvq->initialized) |
| return; |
| |
| if (mvq->fw_state != MLX5_VIRTIO_NET_Q_OBJECT_STATE_RDY) |
| return; |
| |
| if (modify_virtqueue(ndev, mvq, MLX5_VIRTIO_NET_Q_OBJECT_STATE_SUSPEND)) |
| mlx5_vdpa_warn(&ndev->mvdev, "modify to suspend failed\n"); |
| |
| if (query_virtqueue(ndev, mvq, &attr)) { |
| mlx5_vdpa_warn(&ndev->mvdev, "failed to query virtqueue\n"); |
| return; |
| } |
| mvq->avail_idx = attr.available_index; |
| } |
| |
| static void suspend_vqs(struct mlx5_vdpa_net *ndev) |
| { |
| int i; |
| |
| for (i = 0; i < MLX5_MAX_SUPPORTED_VQS; i++) |
| suspend_vq(ndev, &ndev->vqs[i]); |
| } |
| |
| static void teardown_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq) |
| { |
| if (!mvq->initialized) |
| return; |
| |
| suspend_vq(ndev, mvq); |
| destroy_virtqueue(ndev, mvq); |
| qp_destroy(ndev, &mvq->vqqp); |
| qp_destroy(ndev, &mvq->fwqp); |
| cq_destroy(ndev, mvq->index); |
| mvq->initialized = false; |
| } |
| |
| static int create_rqt(struct mlx5_vdpa_net *ndev) |
| { |
| int log_max_rqt; |
| __be32 *list; |
| void *rqtc; |
| int inlen; |
| void *in; |
| int i, j; |
| int err; |
| |
| log_max_rqt = min_t(int, 1, MLX5_CAP_GEN(ndev->mvdev.mdev, log_max_rqt_size)); |
| if (log_max_rqt < 1) |
| return -EOPNOTSUPP; |
| |
| inlen = MLX5_ST_SZ_BYTES(create_rqt_in) + (1 << log_max_rqt) * MLX5_ST_SZ_BYTES(rq_num); |
| in = kzalloc(inlen, GFP_KERNEL); |
| if (!in) |
| return -ENOMEM; |
| |
| MLX5_SET(create_rqt_in, in, uid, ndev->mvdev.res.uid); |
| rqtc = MLX5_ADDR_OF(create_rqt_in, in, rqt_context); |
| |
| MLX5_SET(rqtc, rqtc, list_q_type, MLX5_RQTC_LIST_Q_TYPE_VIRTIO_NET_Q); |
| MLX5_SET(rqtc, rqtc, rqt_max_size, 1 << log_max_rqt); |
| MLX5_SET(rqtc, rqtc, rqt_actual_size, 1); |
| list = MLX5_ADDR_OF(rqtc, rqtc, rq_num[0]); |
| for (i = 0, j = 0; j < ndev->mvdev.max_vqs; j++) { |
| if (!ndev->vqs[j].initialized) |
| continue; |
| |
| if (!vq_is_tx(ndev->vqs[j].index)) { |
| list[i] = cpu_to_be32(ndev->vqs[j].virtq_id); |
| i++; |
| } |
| } |
| |
| err = mlx5_vdpa_create_rqt(&ndev->mvdev, in, inlen, &ndev->res.rqtn); |
| kfree(in); |
| if (err) |
| return err; |
| |
| return 0; |
| } |
| |
| static void destroy_rqt(struct mlx5_vdpa_net *ndev) |
| { |
| mlx5_vdpa_destroy_rqt(&ndev->mvdev, ndev->res.rqtn); |
| } |
| |
| static int create_tir(struct mlx5_vdpa_net *ndev) |
| { |
| #define HASH_IP_L4PORTS \ |
| (MLX5_HASH_FIELD_SEL_SRC_IP | MLX5_HASH_FIELD_SEL_DST_IP | MLX5_HASH_FIELD_SEL_L4_SPORT | \ |
| MLX5_HASH_FIELD_SEL_L4_DPORT) |
| static const u8 rx_hash_toeplitz_key[] = { 0x2c, 0xc6, 0x81, 0xd1, 0x5b, 0xdb, 0xf4, 0xf7, |
| 0xfc, 0xa2, 0x83, 0x19, 0xdb, 0x1a, 0x3e, 0x94, |
| 0x6b, 0x9e, 0x38, 0xd9, 0x2c, 0x9c, 0x03, 0xd1, |
| 0xad, 0x99, 0x44, 0xa7, 0xd9, 0x56, 0x3d, 0x59, |
| 0x06, 0x3c, 0x25, 0xf3, 0xfc, 0x1f, 0xdc, 0x2a }; |
| void *rss_key; |
| void *outer; |
| void *tirc; |
| void *in; |
| int err; |
| |
| in = kzalloc(MLX5_ST_SZ_BYTES(create_tir_in), GFP_KERNEL); |
| if (!in) |
| return -ENOMEM; |
| |
| MLX5_SET(create_tir_in, in, uid, ndev->mvdev.res.uid); |
| tirc = MLX5_ADDR_OF(create_tir_in, in, ctx); |
| MLX5_SET(tirc, tirc, disp_type, MLX5_TIRC_DISP_TYPE_INDIRECT); |
| |
| MLX5_SET(tirc, tirc, rx_hash_symmetric, 1); |
| MLX5_SET(tirc, tirc, rx_hash_fn, MLX5_RX_HASH_FN_TOEPLITZ); |
| rss_key = MLX5_ADDR_OF(tirc, tirc, rx_hash_toeplitz_key); |
| memcpy(rss_key, rx_hash_toeplitz_key, sizeof(rx_hash_toeplitz_key)); |
| |
| outer = MLX5_ADDR_OF(tirc, tirc, rx_hash_field_selector_outer); |
| MLX5_SET(rx_hash_field_select, outer, l3_prot_type, MLX5_L3_PROT_TYPE_IPV4); |
| MLX5_SET(rx_hash_field_select, outer, l4_prot_type, MLX5_L4_PROT_TYPE_TCP); |
| MLX5_SET(rx_hash_field_select, outer, selected_fields, HASH_IP_L4PORTS); |
| |
| MLX5_SET(tirc, tirc, indirect_table, ndev->res.rqtn); |
| MLX5_SET(tirc, tirc, transport_domain, ndev->res.tdn); |
| |
| err = mlx5_vdpa_create_tir(&ndev->mvdev, in, &ndev->res.tirn); |
| kfree(in); |
| return err; |
| } |
| |
| static void destroy_tir(struct mlx5_vdpa_net *ndev) |
| { |
| mlx5_vdpa_destroy_tir(&ndev->mvdev, ndev->res.tirn); |
| } |
| |
| static int add_fwd_to_tir(struct mlx5_vdpa_net *ndev) |
| { |
| struct mlx5_flow_destination dest[2] = {}; |
| struct mlx5_flow_table_attr ft_attr = {}; |
| struct mlx5_flow_act flow_act = {}; |
| struct mlx5_flow_namespace *ns; |
| int err; |
| |
| /* for now, one entry, match all, forward to tir */ |
| ft_attr.max_fte = 1; |
| ft_attr.autogroup.max_num_groups = 1; |
| |
| ns = mlx5_get_flow_namespace(ndev->mvdev.mdev, MLX5_FLOW_NAMESPACE_BYPASS); |
| if (!ns) { |
| mlx5_vdpa_warn(&ndev->mvdev, "get flow namespace\n"); |
| return -EOPNOTSUPP; |
| } |
| |
| ndev->rxft = mlx5_create_auto_grouped_flow_table(ns, &ft_attr); |
| if (IS_ERR(ndev->rxft)) |
| return PTR_ERR(ndev->rxft); |
| |
| ndev->rx_counter = mlx5_fc_create(ndev->mvdev.mdev, false); |
| if (IS_ERR(ndev->rx_counter)) { |
| err = PTR_ERR(ndev->rx_counter); |
| goto err_fc; |
| } |
| |
| flow_act.action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST | MLX5_FLOW_CONTEXT_ACTION_COUNT; |
| dest[0].type = MLX5_FLOW_DESTINATION_TYPE_TIR; |
| dest[0].tir_num = ndev->res.tirn; |
| dest[1].type = MLX5_FLOW_DESTINATION_TYPE_COUNTER; |
| dest[1].counter_id = mlx5_fc_id(ndev->rx_counter); |
| ndev->rx_rule = mlx5_add_flow_rules(ndev->rxft, NULL, &flow_act, dest, 2); |
| if (IS_ERR(ndev->rx_rule)) { |
| err = PTR_ERR(ndev->rx_rule); |
| ndev->rx_rule = NULL; |
| goto err_rule; |
| } |
| |
| return 0; |
| |
| err_rule: |
| mlx5_fc_destroy(ndev->mvdev.mdev, ndev->rx_counter); |
| err_fc: |
| mlx5_destroy_flow_table(ndev->rxft); |
| return err; |
| } |
| |
| static void remove_fwd_to_tir(struct mlx5_vdpa_net *ndev) |
| { |
| if (!ndev->rx_rule) |
| return; |
| |
| mlx5_del_flow_rules(ndev->rx_rule); |
| mlx5_fc_destroy(ndev->mvdev.mdev, ndev->rx_counter); |
| mlx5_destroy_flow_table(ndev->rxft); |
| |
| ndev->rx_rule = NULL; |
| } |
| |
| static void mlx5_vdpa_kick_vq(struct vdpa_device *vdev, u16 idx) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx]; |
| |
| if (unlikely(!mvq->ready)) |
| return; |
| |
| iowrite16(idx, ndev->mvdev.res.kick_addr); |
| } |
| |
| static int mlx5_vdpa_set_vq_address(struct vdpa_device *vdev, u16 idx, u64 desc_area, |
| u64 driver_area, u64 device_area) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx]; |
| |
| mvq->desc_addr = desc_area; |
| mvq->device_addr = device_area; |
| mvq->driver_addr = driver_area; |
| return 0; |
| } |
| |
| static void mlx5_vdpa_set_vq_num(struct vdpa_device *vdev, u16 idx, u32 num) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| struct mlx5_vdpa_virtqueue *mvq; |
| |
| mvq = &ndev->vqs[idx]; |
| mvq->num_ent = num; |
| } |
| |
| static void mlx5_vdpa_set_vq_cb(struct vdpa_device *vdev, u16 idx, struct vdpa_callback *cb) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| struct mlx5_vdpa_virtqueue *vq = &ndev->vqs[idx]; |
| |
| vq->event_cb = *cb; |
| } |
| |
| static void mlx5_vdpa_set_vq_ready(struct vdpa_device *vdev, u16 idx, bool ready) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx]; |
| |
| if (!ready) |
| suspend_vq(ndev, mvq); |
| |
| mvq->ready = ready; |
| } |
| |
| static bool mlx5_vdpa_get_vq_ready(struct vdpa_device *vdev, u16 idx) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx]; |
| |
| return mvq->ready; |
| } |
| |
| static int mlx5_vdpa_set_vq_state(struct vdpa_device *vdev, u16 idx, |
| const struct vdpa_vq_state *state) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx]; |
| |
| if (mvq->fw_state == MLX5_VIRTIO_NET_Q_OBJECT_STATE_RDY) { |
| mlx5_vdpa_warn(mvdev, "can't modify available index\n"); |
| return -EINVAL; |
| } |
| |
| mvq->avail_idx = state->avail_index; |
| return 0; |
| } |
| |
| static int mlx5_vdpa_get_vq_state(struct vdpa_device *vdev, u16 idx, struct vdpa_vq_state *state) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| struct mlx5_vdpa_virtqueue *mvq = &ndev->vqs[idx]; |
| struct mlx5_virtq_attr attr; |
| int err; |
| |
| /* If the virtq object was destroyed, use the value saved at |
| * the last minute of suspend_vq. This caters for userspace |
| * that cares about emulating the index after vq is stopped. |
| */ |
| if (!mvq->initialized) { |
| state->avail_index = mvq->avail_idx; |
| return 0; |
| } |
| |
| err = query_virtqueue(ndev, mvq, &attr); |
| if (err) { |
| mlx5_vdpa_warn(mvdev, "failed to query virtqueue\n"); |
| return err; |
| } |
| state->avail_index = attr.available_index; |
| return 0; |
| } |
| |
| static u32 mlx5_vdpa_get_vq_align(struct vdpa_device *vdev) |
| { |
| return PAGE_SIZE; |
| } |
| |
| enum { MLX5_VIRTIO_NET_F_GUEST_CSUM = 1 << 9, |
| MLX5_VIRTIO_NET_F_CSUM = 1 << 10, |
| MLX5_VIRTIO_NET_F_HOST_TSO6 = 1 << 11, |
| MLX5_VIRTIO_NET_F_HOST_TSO4 = 1 << 12, |
| }; |
| |
| static u64 mlx_to_vritio_features(u16 dev_features) |
| { |
| u64 result = 0; |
| |
| if (dev_features & MLX5_VIRTIO_NET_F_GUEST_CSUM) |
| result |= BIT_ULL(VIRTIO_NET_F_GUEST_CSUM); |
| if (dev_features & MLX5_VIRTIO_NET_F_CSUM) |
| result |= BIT_ULL(VIRTIO_NET_F_CSUM); |
| if (dev_features & MLX5_VIRTIO_NET_F_HOST_TSO6) |
| result |= BIT_ULL(VIRTIO_NET_F_HOST_TSO6); |
| if (dev_features & MLX5_VIRTIO_NET_F_HOST_TSO4) |
| result |= BIT_ULL(VIRTIO_NET_F_HOST_TSO4); |
| |
| return result; |
| } |
| |
| static u64 mlx5_vdpa_get_features(struct vdpa_device *vdev) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| u16 dev_features; |
| |
| dev_features = MLX5_CAP_DEV_VDPA_EMULATION(mvdev->mdev, device_features_bits_mask); |
| ndev->mvdev.mlx_features = mlx_to_vritio_features(dev_features); |
| if (MLX5_CAP_DEV_VDPA_EMULATION(mvdev->mdev, virtio_version_1_0)) |
| ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_F_VERSION_1); |
| ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_F_ACCESS_PLATFORM); |
| print_features(mvdev, ndev->mvdev.mlx_features, false); |
| return ndev->mvdev.mlx_features; |
| } |
| |
| static int verify_min_features(struct mlx5_vdpa_dev *mvdev, u64 features) |
| { |
| if (!(features & BIT_ULL(VIRTIO_F_ACCESS_PLATFORM))) |
| return -EOPNOTSUPP; |
| |
| return 0; |
| } |
| |
| static int setup_virtqueues(struct mlx5_vdpa_net *ndev) |
| { |
| int err; |
| int i; |
| |
| for (i = 0; i < 2 * mlx5_vdpa_max_qps(ndev->mvdev.max_vqs); i++) { |
| err = setup_vq(ndev, &ndev->vqs[i]); |
| if (err) |
| goto err_vq; |
| } |
| |
| return 0; |
| |
| err_vq: |
| for (--i; i >= 0; i--) |
| teardown_vq(ndev, &ndev->vqs[i]); |
| |
| return err; |
| } |
| |
| static void teardown_virtqueues(struct mlx5_vdpa_net *ndev) |
| { |
| struct mlx5_vdpa_virtqueue *mvq; |
| int i; |
| |
| for (i = ndev->mvdev.max_vqs - 1; i >= 0; i--) { |
| mvq = &ndev->vqs[i]; |
| if (!mvq->initialized) |
| continue; |
| |
| teardown_vq(ndev, mvq); |
| } |
| } |
| |
| /* TODO: cross-endian support */ |
| static inline bool mlx5_vdpa_is_little_endian(struct mlx5_vdpa_dev *mvdev) |
| { |
| return virtio_legacy_is_little_endian() || |
| (mvdev->actual_features & (1ULL << VIRTIO_F_VERSION_1)); |
| } |
| |
| static int mlx5_vdpa_set_features(struct vdpa_device *vdev, u64 features) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| int err; |
| |
| print_features(mvdev, features, true); |
| |
| err = verify_min_features(mvdev, features); |
| if (err) |
| return err; |
| |
| ndev->mvdev.actual_features = features & ndev->mvdev.mlx_features; |
| ndev->config.mtu = __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev), |
| ndev->mtu); |
| return err; |
| } |
| |
| static void mlx5_vdpa_set_config_cb(struct vdpa_device *vdev, struct vdpa_callback *cb) |
| { |
| /* not implemented */ |
| mlx5_vdpa_warn(to_mvdev(vdev), "set config callback not supported\n"); |
| } |
| |
| #define MLX5_VDPA_MAX_VQ_ENTRIES 256 |
| static u16 mlx5_vdpa_get_vq_num_max(struct vdpa_device *vdev) |
| { |
| return MLX5_VDPA_MAX_VQ_ENTRIES; |
| } |
| |
| static u32 mlx5_vdpa_get_device_id(struct vdpa_device *vdev) |
| { |
| return VIRTIO_ID_NET; |
| } |
| |
| static u32 mlx5_vdpa_get_vendor_id(struct vdpa_device *vdev) |
| { |
| return PCI_VENDOR_ID_MELLANOX; |
| } |
| |
| static u8 mlx5_vdpa_get_status(struct vdpa_device *vdev) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| |
| print_status(mvdev, ndev->mvdev.status, false); |
| return ndev->mvdev.status; |
| } |
| |
| static int save_channel_info(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq) |
| { |
| struct mlx5_vq_restore_info *ri = &mvq->ri; |
| struct mlx5_virtq_attr attr; |
| int err; |
| |
| if (!mvq->initialized) |
| return 0; |
| |
| err = query_virtqueue(ndev, mvq, &attr); |
| if (err) |
| return err; |
| |
| ri->avail_index = attr.available_index; |
| ri->ready = mvq->ready; |
| ri->num_ent = mvq->num_ent; |
| ri->desc_addr = mvq->desc_addr; |
| ri->device_addr = mvq->device_addr; |
| ri->driver_addr = mvq->driver_addr; |
| ri->cb = mvq->event_cb; |
| ri->restore = true; |
| return 0; |
| } |
| |
| static int save_channels_info(struct mlx5_vdpa_net *ndev) |
| { |
| int i; |
| |
| for (i = 0; i < ndev->mvdev.max_vqs; i++) { |
| memset(&ndev->vqs[i].ri, 0, sizeof(ndev->vqs[i].ri)); |
| save_channel_info(ndev, &ndev->vqs[i]); |
| } |
| return 0; |
| } |
| |
| static void mlx5_clear_vqs(struct mlx5_vdpa_net *ndev) |
| { |
| int i; |
| |
| for (i = 0; i < ndev->mvdev.max_vqs; i++) |
| memset(&ndev->vqs[i], 0, offsetof(struct mlx5_vdpa_virtqueue, ri)); |
| } |
| |
| static void restore_channels_info(struct mlx5_vdpa_net *ndev) |
| { |
| struct mlx5_vdpa_virtqueue *mvq; |
| struct mlx5_vq_restore_info *ri; |
| int i; |
| |
| mlx5_clear_vqs(ndev); |
| init_mvqs(ndev); |
| for (i = 0; i < ndev->mvdev.max_vqs; i++) { |
| mvq = &ndev->vqs[i]; |
| ri = &mvq->ri; |
| if (!ri->restore) |
| continue; |
| |
| mvq->avail_idx = ri->avail_index; |
| mvq->ready = ri->ready; |
| mvq->num_ent = ri->num_ent; |
| mvq->desc_addr = ri->desc_addr; |
| mvq->device_addr = ri->device_addr; |
| mvq->driver_addr = ri->driver_addr; |
| mvq->event_cb = ri->cb; |
| } |
| } |
| |
| static int mlx5_vdpa_change_map(struct mlx5_vdpa_net *ndev, struct vhost_iotlb *iotlb) |
| { |
| int err; |
| |
| suspend_vqs(ndev); |
| err = save_channels_info(ndev); |
| if (err) |
| goto err_mr; |
| |
| teardown_driver(ndev); |
| mlx5_vdpa_destroy_mr(&ndev->mvdev); |
| err = mlx5_vdpa_create_mr(&ndev->mvdev, iotlb); |
| if (err) |
| goto err_mr; |
| |
| restore_channels_info(ndev); |
| err = setup_driver(ndev); |
| if (err) |
| goto err_setup; |
| |
| return 0; |
| |
| err_setup: |
| mlx5_vdpa_destroy_mr(&ndev->mvdev); |
| err_mr: |
| return err; |
| } |
| |
| static int setup_driver(struct mlx5_vdpa_net *ndev) |
| { |
| int err; |
| |
| mutex_lock(&ndev->reslock); |
| if (ndev->setup) { |
| mlx5_vdpa_warn(&ndev->mvdev, "setup driver called for already setup driver\n"); |
| err = 0; |
| goto out; |
| } |
| err = setup_virtqueues(ndev); |
| if (err) { |
| mlx5_vdpa_warn(&ndev->mvdev, "setup_virtqueues\n"); |
| goto out; |
| } |
| |
| err = create_rqt(ndev); |
| if (err) { |
| mlx5_vdpa_warn(&ndev->mvdev, "create_rqt\n"); |
| goto err_rqt; |
| } |
| |
| err = create_tir(ndev); |
| if (err) { |
| mlx5_vdpa_warn(&ndev->mvdev, "create_tir\n"); |
| goto err_tir; |
| } |
| |
| err = add_fwd_to_tir(ndev); |
| if (err) { |
| mlx5_vdpa_warn(&ndev->mvdev, "add_fwd_to_tir\n"); |
| goto err_fwd; |
| } |
| ndev->setup = true; |
| mutex_unlock(&ndev->reslock); |
| |
| return 0; |
| |
| err_fwd: |
| destroy_tir(ndev); |
| err_tir: |
| destroy_rqt(ndev); |
| err_rqt: |
| teardown_virtqueues(ndev); |
| out: |
| mutex_unlock(&ndev->reslock); |
| return err; |
| } |
| |
| static void teardown_driver(struct mlx5_vdpa_net *ndev) |
| { |
| mutex_lock(&ndev->reslock); |
| if (!ndev->setup) |
| goto out; |
| |
| remove_fwd_to_tir(ndev); |
| destroy_tir(ndev); |
| destroy_rqt(ndev); |
| teardown_virtqueues(ndev); |
| ndev->setup = false; |
| out: |
| mutex_unlock(&ndev->reslock); |
| } |
| |
| static void mlx5_vdpa_set_status(struct vdpa_device *vdev, u8 status) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| int err; |
| |
| print_status(mvdev, status, true); |
| if (!status) { |
| mlx5_vdpa_info(mvdev, "performing device reset\n"); |
| teardown_driver(ndev); |
| mlx5_vdpa_destroy_mr(&ndev->mvdev); |
| ndev->mvdev.status = 0; |
| ndev->mvdev.mlx_features = 0; |
| ++mvdev->generation; |
| return; |
| } |
| |
| if ((status ^ ndev->mvdev.status) & VIRTIO_CONFIG_S_DRIVER_OK) { |
| if (status & VIRTIO_CONFIG_S_DRIVER_OK) { |
| err = setup_driver(ndev); |
| if (err) { |
| mlx5_vdpa_warn(mvdev, "failed to setup driver\n"); |
| goto err_setup; |
| } |
| } else { |
| mlx5_vdpa_warn(mvdev, "did not expect DRIVER_OK to be cleared\n"); |
| return; |
| } |
| } |
| |
| ndev->mvdev.status = status; |
| return; |
| |
| err_setup: |
| mlx5_vdpa_destroy_mr(&ndev->mvdev); |
| ndev->mvdev.status |= VIRTIO_CONFIG_S_FAILED; |
| } |
| |
| static void mlx5_vdpa_get_config(struct vdpa_device *vdev, unsigned int offset, void *buf, |
| unsigned int len) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| |
| if (offset + len < sizeof(struct virtio_net_config)) |
| memcpy(buf, (u8 *)&ndev->config + offset, len); |
| } |
| |
| static void mlx5_vdpa_set_config(struct vdpa_device *vdev, unsigned int offset, const void *buf, |
| unsigned int len) |
| { |
| /* not supported */ |
| } |
| |
| static u32 mlx5_vdpa_get_generation(struct vdpa_device *vdev) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| |
| return mvdev->generation; |
| } |
| |
| static int mlx5_vdpa_set_map(struct vdpa_device *vdev, struct vhost_iotlb *iotlb) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev); |
| bool change_map; |
| int err; |
| |
| err = mlx5_vdpa_handle_set_map(mvdev, iotlb, &change_map); |
| if (err) { |
| mlx5_vdpa_warn(mvdev, "set map failed(%d)\n", err); |
| return err; |
| } |
| |
| if (change_map) |
| return mlx5_vdpa_change_map(ndev, iotlb); |
| |
| return 0; |
| } |
| |
| static void mlx5_vdpa_free(struct vdpa_device *vdev) |
| { |
| struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); |
| struct mlx5_vdpa_net *ndev; |
| |
| ndev = to_mlx5_vdpa_ndev(mvdev); |
| |
| free_resources(ndev); |
| mlx5_vdpa_free_resources(&ndev->mvdev); |
| mutex_destroy(&ndev->reslock); |
| } |
| |
| static struct vdpa_notification_area mlx5_get_vq_notification(struct vdpa_device *vdev, u16 idx) |
| { |
| struct vdpa_notification_area ret = {}; |
| |
| return ret; |
| } |
| |
| static int mlx5_get_vq_irq(struct vdpa_device *vdv, u16 idx) |
| { |
| return -EOPNOTSUPP; |
| } |
| |
| static const struct vdpa_config_ops mlx5_vdpa_ops = { |
| .set_vq_address = mlx5_vdpa_set_vq_address, |
| .set_vq_num = mlx5_vdpa_set_vq_num, |
| .kick_vq = mlx5_vdpa_kick_vq, |
| .set_vq_cb = mlx5_vdpa_set_vq_cb, |
| .set_vq_ready = mlx5_vdpa_set_vq_ready, |
| .get_vq_ready = mlx5_vdpa_get_vq_ready, |
| .set_vq_state = mlx5_vdpa_set_vq_state, |
| .get_vq_state = mlx5_vdpa_get_vq_state, |
| .get_vq_notification = mlx5_get_vq_notification, |
| .get_vq_irq = mlx5_get_vq_irq, |
| .get_vq_align = mlx5_vdpa_get_vq_align, |
| .get_features = mlx5_vdpa_get_features, |
| .set_features = mlx5_vdpa_set_features, |
| .set_config_cb = mlx5_vdpa_set_config_cb, |
| .get_vq_num_max = mlx5_vdpa_get_vq_num_max, |
| .get_device_id = mlx5_vdpa_get_device_id, |
| .get_vendor_id = mlx5_vdpa_get_vendor_id, |
| .get_status = mlx5_vdpa_get_status, |
| .set_status = mlx5_vdpa_set_status, |
| .get_config = mlx5_vdpa_get_config, |
| .set_config = mlx5_vdpa_set_config, |
| .get_generation = mlx5_vdpa_get_generation, |
| .set_map = mlx5_vdpa_set_map, |
| .free = mlx5_vdpa_free, |
| }; |
| |
| static int alloc_resources(struct mlx5_vdpa_net *ndev) |
| { |
| struct mlx5_vdpa_net_resources *res = &ndev->res; |
| int err; |
| |
| if (res->valid) { |
| mlx5_vdpa_warn(&ndev->mvdev, "resources already allocated\n"); |
| return -EEXIST; |
| } |
| |
| err = mlx5_vdpa_alloc_transport_domain(&ndev->mvdev, &res->tdn); |
| if (err) |
| return err; |
| |
| err = create_tis(ndev); |
| if (err) |
| goto err_tis; |
| |
| res->valid = true; |
| |
| return 0; |
| |
| err_tis: |
| mlx5_vdpa_dealloc_transport_domain(&ndev->mvdev, res->tdn); |
| return err; |
| } |
| |
| static void free_resources(struct mlx5_vdpa_net *ndev) |
| { |
| struct mlx5_vdpa_net_resources *res = &ndev->res; |
| |
| if (!res->valid) |
| return; |
| |
| destroy_tis(ndev); |
| mlx5_vdpa_dealloc_transport_domain(&ndev->mvdev, res->tdn); |
| res->valid = false; |
| } |
| |
| static void init_mvqs(struct mlx5_vdpa_net *ndev) |
| { |
| struct mlx5_vdpa_virtqueue *mvq; |
| int i; |
| |
| for (i = 0; i < 2 * mlx5_vdpa_max_qps(ndev->mvdev.max_vqs); ++i) { |
| mvq = &ndev->vqs[i]; |
| memset(mvq, 0, offsetof(struct mlx5_vdpa_virtqueue, ri)); |
| mvq->index = i; |
| mvq->ndev = ndev; |
| mvq->fwqp.fw = true; |
| } |
| for (; i < ndev->mvdev.max_vqs; i++) { |
| mvq = &ndev->vqs[i]; |
| memset(mvq, 0, offsetof(struct mlx5_vdpa_virtqueue, ri)); |
| mvq->index = i; |
| mvq->ndev = ndev; |
| } |
| } |
| |
| void *mlx5_vdpa_add_dev(struct mlx5_core_dev *mdev) |
| { |
| struct virtio_net_config *config; |
| struct mlx5_vdpa_dev *mvdev; |
| struct mlx5_vdpa_net *ndev; |
| u32 max_vqs; |
| int err; |
| |
| /* we save one virtqueue for control virtqueue should we require it */ |
| max_vqs = MLX5_CAP_DEV_VDPA_EMULATION(mdev, max_num_virtio_queues); |
| max_vqs = min_t(u32, max_vqs, MLX5_MAX_SUPPORTED_VQS); |
| |
| ndev = vdpa_alloc_device(struct mlx5_vdpa_net, mvdev.vdev, mdev->device, &mlx5_vdpa_ops, |
| 2 * mlx5_vdpa_max_qps(max_vqs)); |
| if (IS_ERR(ndev)) |
| return ndev; |
| |
| ndev->mvdev.max_vqs = max_vqs; |
| mvdev = &ndev->mvdev; |
| mvdev->mdev = mdev; |
| init_mvqs(ndev); |
| mutex_init(&ndev->reslock); |
| config = &ndev->config; |
| err = mlx5_query_nic_vport_mtu(mdev, &ndev->mtu); |
| if (err) |
| goto err_mtu; |
| |
| err = mlx5_query_nic_vport_mac_address(mdev, 0, 0, config->mac); |
| if (err) |
| goto err_mtu; |
| |
| mvdev->vdev.dma_dev = mdev->device; |
| err = mlx5_vdpa_alloc_resources(&ndev->mvdev); |
| if (err) |
| goto err_mtu; |
| |
| err = alloc_resources(ndev); |
| if (err) |
| goto err_res; |
| |
| err = vdpa_register_device(&mvdev->vdev); |
| if (err) |
| goto err_reg; |
| |
| return ndev; |
| |
| err_reg: |
| free_resources(ndev); |
| err_res: |
| mlx5_vdpa_free_resources(&ndev->mvdev); |
| err_mtu: |
| mutex_destroy(&ndev->reslock); |
| put_device(&mvdev->vdev.dev); |
| return ERR_PTR(err); |
| } |
| |
| void mlx5_vdpa_remove_dev(struct mlx5_vdpa_dev *mvdev) |
| { |
| vdpa_unregister_device(&mvdev->vdev); |
| } |