diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/lib/aso.c')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/lib/aso.c | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/aso.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/aso.c new file mode 100644 index 000000000..c215252f2 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/aso.c @@ -0,0 +1,432 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +// Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved. + +#include <linux/mlx5/device.h> +#include <linux/mlx5/transobj.h> +#include "clock.h" +#include "aso.h" +#include "wq.h" + +struct mlx5_aso_cq { + /* data path - accessed per cqe */ + struct mlx5_cqwq wq; + + /* data path - accessed per napi poll */ + struct mlx5_core_cq mcq; + + /* control */ + struct mlx5_core_dev *mdev; + struct mlx5_wq_ctrl wq_ctrl; +} ____cacheline_aligned_in_smp; + +struct mlx5_aso { + /* data path */ + u16 cc; + u16 pc; + + struct mlx5_wqe_ctrl_seg *doorbell_cseg; + struct mlx5_aso_cq cq; + + /* read only */ + struct mlx5_wq_cyc wq; + void __iomem *uar_map; + u32 sqn; + + /* control path */ + struct mlx5_wq_ctrl wq_ctrl; + +} ____cacheline_aligned_in_smp; + +static void mlx5_aso_free_cq(struct mlx5_aso_cq *cq) +{ + mlx5_wq_destroy(&cq->wq_ctrl); +} + +static int mlx5_aso_alloc_cq(struct mlx5_core_dev *mdev, int numa_node, + void *cqc_data, struct mlx5_aso_cq *cq) +{ + struct mlx5_core_cq *mcq = &cq->mcq; + struct mlx5_wq_param param; + int err; + u32 i; + + param.buf_numa_node = numa_node; + param.db_numa_node = numa_node; + + err = mlx5_cqwq_create(mdev, ¶m, cqc_data, &cq->wq, &cq->wq_ctrl); + if (err) + return err; + + mcq->cqe_sz = 64; + mcq->set_ci_db = cq->wq_ctrl.db.db; + mcq->arm_db = cq->wq_ctrl.db.db + 1; + + for (i = 0; i < mlx5_cqwq_get_size(&cq->wq); i++) { + struct mlx5_cqe64 *cqe = mlx5_cqwq_get_wqe(&cq->wq, i); + + cqe->op_own = 0xf1; + } + + cq->mdev = mdev; + + return 0; +} + +static int create_aso_cq(struct mlx5_aso_cq *cq, void *cqc_data) +{ + u32 out[MLX5_ST_SZ_DW(create_cq_out)]; + struct mlx5_core_dev *mdev = cq->mdev; + struct mlx5_core_cq *mcq = &cq->mcq; + void *in, *cqc; + int inlen, eqn; + int err; + + err = mlx5_vector2eqn(mdev, 0, &eqn); + if (err) + return err; + + inlen = MLX5_ST_SZ_BYTES(create_cq_in) + + sizeof(u64) * cq->wq_ctrl.buf.npages; + in = kvzalloc(inlen, GFP_KERNEL); + if (!in) + return -ENOMEM; + + cqc = MLX5_ADDR_OF(create_cq_in, in, cq_context); + + memcpy(cqc, cqc_data, MLX5_ST_SZ_BYTES(cqc)); + + mlx5_fill_page_frag_array(&cq->wq_ctrl.buf, + (__be64 *)MLX5_ADDR_OF(create_cq_in, in, pas)); + + MLX5_SET(cqc, cqc, cq_period_mode, MLX5_CQ_PERIOD_MODE_START_FROM_EQE); + MLX5_SET(cqc, cqc, c_eqn_or_apu_element, eqn); + MLX5_SET(cqc, cqc, uar_page, mdev->priv.uar->index); + MLX5_SET(cqc, cqc, log_page_size, cq->wq_ctrl.buf.page_shift - + MLX5_ADAPTER_PAGE_SHIFT); + MLX5_SET64(cqc, cqc, dbr_addr, cq->wq_ctrl.db.dma); + + err = mlx5_core_create_cq(mdev, mcq, in, inlen, out, sizeof(out)); + + kvfree(in); + + return err; +} + +static void mlx5_aso_destroy_cq(struct mlx5_aso_cq *cq) +{ + mlx5_core_destroy_cq(cq->mdev, &cq->mcq); + mlx5_wq_destroy(&cq->wq_ctrl); +} + +static int mlx5_aso_create_cq(struct mlx5_core_dev *mdev, int numa_node, + struct mlx5_aso_cq *cq) +{ + void *cqc_data; + int err; + + cqc_data = kvzalloc(MLX5_ST_SZ_BYTES(cqc), GFP_KERNEL); + if (!cqc_data) + return -ENOMEM; + + MLX5_SET(cqc, cqc_data, log_cq_size, 1); + MLX5_SET(cqc, cqc_data, uar_page, mdev->priv.uar->index); + if (MLX5_CAP_GEN(mdev, cqe_128_always) && cache_line_size() >= 128) + MLX5_SET(cqc, cqc_data, cqe_sz, CQE_STRIDE_128_PAD); + + err = mlx5_aso_alloc_cq(mdev, numa_node, cqc_data, cq); + if (err) { + mlx5_core_err(mdev, "Failed to alloc aso wq cq, err=%d\n", err); + goto err_out; + } + + err = create_aso_cq(cq, cqc_data); + if (err) { + mlx5_core_err(mdev, "Failed to create aso wq cq, err=%d\n", err); + goto err_free_cq; + } + + kvfree(cqc_data); + return 0; + +err_free_cq: + mlx5_aso_free_cq(cq); +err_out: + kvfree(cqc_data); + return err; +} + +static int mlx5_aso_alloc_sq(struct mlx5_core_dev *mdev, int numa_node, + void *sqc_data, struct mlx5_aso *sq) +{ + void *sqc_wq = MLX5_ADDR_OF(sqc, sqc_data, wq); + struct mlx5_wq_cyc *wq = &sq->wq; + struct mlx5_wq_param param; + int err; + + sq->uar_map = mdev->mlx5e_res.hw_objs.bfreg.map; + + param.db_numa_node = numa_node; + param.buf_numa_node = numa_node; + err = mlx5_wq_cyc_create(mdev, ¶m, sqc_wq, wq, &sq->wq_ctrl); + if (err) + return err; + wq->db = &wq->db[MLX5_SND_DBR]; + + return 0; +} + +static int create_aso_sq(struct mlx5_core_dev *mdev, int pdn, + void *sqc_data, struct mlx5_aso *sq) +{ + void *in, *sqc, *wq; + int inlen, err; + u8 ts_format; + + inlen = MLX5_ST_SZ_BYTES(create_sq_in) + + sizeof(u64) * sq->wq_ctrl.buf.npages; + in = kvzalloc(inlen, GFP_KERNEL); + if (!in) + return -ENOMEM; + + sqc = MLX5_ADDR_OF(create_sq_in, in, ctx); + wq = MLX5_ADDR_OF(sqc, sqc, wq); + + memcpy(sqc, sqc_data, MLX5_ST_SZ_BYTES(sqc)); + MLX5_SET(sqc, sqc, cqn, sq->cq.mcq.cqn); + + MLX5_SET(sqc, sqc, state, MLX5_SQC_STATE_RST); + MLX5_SET(sqc, sqc, flush_in_error_en, 1); + + ts_format = mlx5_is_real_time_sq(mdev) ? + MLX5_TIMESTAMP_FORMAT_REAL_TIME : + MLX5_TIMESTAMP_FORMAT_FREE_RUNNING; + MLX5_SET(sqc, sqc, ts_format, ts_format); + + MLX5_SET(wq, wq, wq_type, MLX5_WQ_TYPE_CYCLIC); + MLX5_SET(wq, wq, uar_page, mdev->mlx5e_res.hw_objs.bfreg.index); + MLX5_SET(wq, wq, log_wq_pg_sz, sq->wq_ctrl.buf.page_shift - + MLX5_ADAPTER_PAGE_SHIFT); + MLX5_SET64(wq, wq, dbr_addr, sq->wq_ctrl.db.dma); + + mlx5_fill_page_frag_array(&sq->wq_ctrl.buf, + (__be64 *)MLX5_ADDR_OF(wq, wq, pas)); + + err = mlx5_core_create_sq(mdev, in, inlen, &sq->sqn); + + kvfree(in); + + return err; +} + +static int mlx5_aso_set_sq_rdy(struct mlx5_core_dev *mdev, u32 sqn) +{ + void *in, *sqc; + int inlen, err; + + inlen = MLX5_ST_SZ_BYTES(modify_sq_in); + in = kvzalloc(inlen, GFP_KERNEL); + if (!in) + return -ENOMEM; + + MLX5_SET(modify_sq_in, in, sq_state, MLX5_SQC_STATE_RST); + sqc = MLX5_ADDR_OF(modify_sq_in, in, ctx); + MLX5_SET(sqc, sqc, state, MLX5_SQC_STATE_RDY); + + err = mlx5_core_modify_sq(mdev, sqn, in); + + kvfree(in); + + return err; +} + +static int mlx5_aso_create_sq_rdy(struct mlx5_core_dev *mdev, u32 pdn, + void *sqc_data, struct mlx5_aso *sq) +{ + int err; + + err = create_aso_sq(mdev, pdn, sqc_data, sq); + if (err) + return err; + + err = mlx5_aso_set_sq_rdy(mdev, sq->sqn); + if (err) + mlx5_core_destroy_sq(mdev, sq->sqn); + + return err; +} + +static void mlx5_aso_free_sq(struct mlx5_aso *sq) +{ + mlx5_wq_destroy(&sq->wq_ctrl); +} + +static void mlx5_aso_destroy_sq(struct mlx5_aso *sq) +{ + mlx5_core_destroy_sq(sq->cq.mdev, sq->sqn); + mlx5_aso_free_sq(sq); +} + +static int mlx5_aso_create_sq(struct mlx5_core_dev *mdev, int numa_node, + u32 pdn, struct mlx5_aso *sq) +{ + void *sqc_data, *wq; + int err; + + sqc_data = kvzalloc(MLX5_ST_SZ_BYTES(sqc), GFP_KERNEL); + if (!sqc_data) + return -ENOMEM; + + wq = MLX5_ADDR_OF(sqc, sqc_data, wq); + MLX5_SET(wq, wq, log_wq_stride, ilog2(MLX5_SEND_WQE_BB)); + MLX5_SET(wq, wq, pd, pdn); + MLX5_SET(wq, wq, log_wq_sz, 1); + + err = mlx5_aso_alloc_sq(mdev, numa_node, sqc_data, sq); + if (err) { + mlx5_core_err(mdev, "Failed to alloc aso wq sq, err=%d\n", err); + goto err_out; + } + + err = mlx5_aso_create_sq_rdy(mdev, pdn, sqc_data, sq); + if (err) { + mlx5_core_err(mdev, "Failed to open aso wq sq, err=%d\n", err); + goto err_free_asosq; + } + + mlx5_core_dbg(mdev, "aso sq->sqn = 0x%x\n", sq->sqn); + + kvfree(sqc_data); + return 0; + +err_free_asosq: + mlx5_aso_free_sq(sq); +err_out: + kvfree(sqc_data); + return err; +} + +struct mlx5_aso *mlx5_aso_create(struct mlx5_core_dev *mdev, u32 pdn) +{ + int numa_node = dev_to_node(mlx5_core_dma_dev(mdev)); + struct mlx5_aso *aso; + int err; + + aso = kzalloc(sizeof(*aso), GFP_KERNEL); + if (!aso) + return ERR_PTR(-ENOMEM); + + err = mlx5_aso_create_cq(mdev, numa_node, &aso->cq); + if (err) + goto err_cq; + + err = mlx5_aso_create_sq(mdev, numa_node, pdn, aso); + if (err) + goto err_sq; + + return aso; + +err_sq: + mlx5_aso_destroy_cq(&aso->cq); +err_cq: + kfree(aso); + return ERR_PTR(err); +} + +void mlx5_aso_destroy(struct mlx5_aso *aso) +{ + if (IS_ERR_OR_NULL(aso)) + return; + + mlx5_aso_destroy_sq(aso); + mlx5_aso_destroy_cq(&aso->cq); + kfree(aso); +} + +void mlx5_aso_build_wqe(struct mlx5_aso *aso, u8 ds_cnt, + struct mlx5_aso_wqe *aso_wqe, + u32 obj_id, u32 opc_mode) +{ + struct mlx5_wqe_ctrl_seg *cseg = &aso_wqe->ctrl; + + cseg->opmod_idx_opcode = cpu_to_be32((opc_mode << MLX5_WQE_CTRL_WQE_OPC_MOD_SHIFT) | + (aso->pc << MLX5_WQE_CTRL_WQE_INDEX_SHIFT) | + MLX5_OPCODE_ACCESS_ASO); + cseg->qpn_ds = cpu_to_be32((aso->sqn << MLX5_WQE_CTRL_QPN_SHIFT) | ds_cnt); + cseg->fm_ce_se = MLX5_WQE_CTRL_CQ_UPDATE; + cseg->general_id = cpu_to_be32(obj_id); +} + +void *mlx5_aso_get_wqe(struct mlx5_aso *aso) +{ + u16 pi; + + pi = mlx5_wq_cyc_ctr2ix(&aso->wq, aso->pc); + return mlx5_wq_cyc_get_wqe(&aso->wq, pi); +} + +void mlx5_aso_post_wqe(struct mlx5_aso *aso, bool with_data, + struct mlx5_wqe_ctrl_seg *doorbell_cseg) +{ + doorbell_cseg->fm_ce_se |= MLX5_WQE_CTRL_CQ_UPDATE; + /* ensure wqe is visible to device before updating doorbell record */ + dma_wmb(); + + if (with_data) + aso->pc += MLX5_ASO_WQEBBS_DATA; + else + aso->pc += MLX5_ASO_WQEBBS; + *aso->wq.db = cpu_to_be32(aso->pc); + + /* ensure doorbell record is visible to device before ringing the + * doorbell + */ + wmb(); + + mlx5_write64((__be32 *)doorbell_cseg, aso->uar_map); + + /* Ensure doorbell is written on uar_page before poll_cq */ + WRITE_ONCE(doorbell_cseg, NULL); +} + +int mlx5_aso_poll_cq(struct mlx5_aso *aso, bool with_data) +{ + struct mlx5_aso_cq *cq = &aso->cq; + struct mlx5_cqe64 *cqe; + + cqe = mlx5_cqwq_get_cqe(&cq->wq); + if (!cqe) + return -ETIMEDOUT; + + /* sq->cc must be updated only after mlx5_cqwq_update_db_record(), + * otherwise a cq overrun may occur + */ + mlx5_cqwq_pop(&cq->wq); + + if (unlikely(get_cqe_opcode(cqe) != MLX5_CQE_REQ)) { + struct mlx5_err_cqe *err_cqe; + + mlx5_core_err(cq->mdev, "Bad OP in ASOSQ CQE: 0x%x\n", + get_cqe_opcode(cqe)); + + err_cqe = (struct mlx5_err_cqe *)cqe; + mlx5_core_err(cq->mdev, "vendor_err_synd=%x\n", + err_cqe->vendor_err_synd); + mlx5_core_err(cq->mdev, "syndrome=%x\n", + err_cqe->syndrome); + print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET, + 16, 1, err_cqe, + sizeof(*err_cqe), false); + } + + mlx5_cqwq_update_db_record(&cq->wq); + + /* ensure cq space is freed before enabling more cqes */ + wmb(); + + if (with_data) + aso->cc += MLX5_ASO_WQEBBS_DATA; + else + aso->cc += MLX5_ASO_WQEBBS; + + return 0; +} |