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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/vdpa/mlx5/core/resources.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/vdpa/mlx5/core/resources.c')
-rw-r--r-- | drivers/vdpa/mlx5/core/resources.c | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/drivers/vdpa/mlx5/core/resources.c b/drivers/vdpa/mlx5/core/resources.c new file mode 100644 index 000000000..9800f9bec --- /dev/null +++ b/drivers/vdpa/mlx5/core/resources.c @@ -0,0 +1,322 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* Copyright (c) 2020 Mellanox Technologies Ltd. */ + +#include <linux/iova.h> +#include <linux/mlx5/driver.h> +#include "mlx5_vdpa.h" + +static int alloc_pd(struct mlx5_vdpa_dev *dev, u32 *pdn, u16 uid) +{ + struct mlx5_core_dev *mdev = dev->mdev; + + u32 out[MLX5_ST_SZ_DW(alloc_pd_out)] = {}; + u32 in[MLX5_ST_SZ_DW(alloc_pd_in)] = {}; + int err; + + MLX5_SET(alloc_pd_in, in, opcode, MLX5_CMD_OP_ALLOC_PD); + MLX5_SET(alloc_pd_in, in, uid, uid); + + err = mlx5_cmd_exec_inout(mdev, alloc_pd, in, out); + if (!err) + *pdn = MLX5_GET(alloc_pd_out, out, pd); + + return err; +} + +static int dealloc_pd(struct mlx5_vdpa_dev *dev, u32 pdn, u16 uid) +{ + u32 in[MLX5_ST_SZ_DW(dealloc_pd_in)] = {}; + struct mlx5_core_dev *mdev = dev->mdev; + + MLX5_SET(dealloc_pd_in, in, opcode, MLX5_CMD_OP_DEALLOC_PD); + MLX5_SET(dealloc_pd_in, in, pd, pdn); + MLX5_SET(dealloc_pd_in, in, uid, uid); + return mlx5_cmd_exec_in(mdev, dealloc_pd, in); +} + +static int get_null_mkey(struct mlx5_vdpa_dev *dev, u32 *null_mkey) +{ + u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {}; + u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)] = {}; + struct mlx5_core_dev *mdev = dev->mdev; + int err; + + MLX5_SET(query_special_contexts_in, in, opcode, MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS); + err = mlx5_cmd_exec_inout(mdev, query_special_contexts, in, out); + if (!err) + *null_mkey = MLX5_GET(query_special_contexts_out, out, null_mkey); + return err; +} + +static int create_uctx(struct mlx5_vdpa_dev *mvdev, u16 *uid) +{ + u32 out[MLX5_ST_SZ_DW(create_uctx_out)] = {}; + int inlen; + void *in; + int err; + + if (MLX5_CAP_GEN(mvdev->mdev, umem_uid_0)) + return 0; + + /* 0 means not supported */ + if (!MLX5_CAP_GEN(mvdev->mdev, log_max_uctx)) + return -EOPNOTSUPP; + + inlen = MLX5_ST_SZ_BYTES(create_uctx_in); + in = kzalloc(inlen, GFP_KERNEL); + if (!in) + return -ENOMEM; + + MLX5_SET(create_uctx_in, in, opcode, MLX5_CMD_OP_CREATE_UCTX); + MLX5_SET(create_uctx_in, in, uctx.cap, MLX5_UCTX_CAP_RAW_TX); + + err = mlx5_cmd_exec(mvdev->mdev, in, inlen, out, sizeof(out)); + kfree(in); + if (!err) + *uid = MLX5_GET(create_uctx_out, out, uid); + + return err; +} + +static void destroy_uctx(struct mlx5_vdpa_dev *mvdev, u32 uid) +{ + u32 out[MLX5_ST_SZ_DW(destroy_uctx_out)] = {}; + u32 in[MLX5_ST_SZ_DW(destroy_uctx_in)] = {}; + + if (!uid) + return; + + MLX5_SET(destroy_uctx_in, in, opcode, MLX5_CMD_OP_DESTROY_UCTX); + MLX5_SET(destroy_uctx_in, in, uid, uid); + + mlx5_cmd_exec(mvdev->mdev, in, sizeof(in), out, sizeof(out)); +} + +int mlx5_vdpa_create_tis(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tisn) +{ + u32 out[MLX5_ST_SZ_DW(create_tis_out)] = {}; + int err; + + MLX5_SET(create_tis_in, in, opcode, MLX5_CMD_OP_CREATE_TIS); + MLX5_SET(create_tis_in, in, uid, mvdev->res.uid); + err = mlx5_cmd_exec_inout(mvdev->mdev, create_tis, in, out); + if (!err) + *tisn = MLX5_GET(create_tis_out, out, tisn); + + return err; +} + +void mlx5_vdpa_destroy_tis(struct mlx5_vdpa_dev *mvdev, u32 tisn) +{ + u32 in[MLX5_ST_SZ_DW(destroy_tis_in)] = {}; + + MLX5_SET(destroy_tis_in, in, opcode, MLX5_CMD_OP_DESTROY_TIS); + MLX5_SET(destroy_tis_in, in, uid, mvdev->res.uid); + MLX5_SET(destroy_tis_in, in, tisn, tisn); + mlx5_cmd_exec_in(mvdev->mdev, destroy_tis, in); +} + +int mlx5_vdpa_create_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 *rqtn) +{ + u32 out[MLX5_ST_SZ_DW(create_rqt_out)] = {}; + int err; + + MLX5_SET(create_rqt_in, in, opcode, MLX5_CMD_OP_CREATE_RQT); + err = mlx5_cmd_exec(mvdev->mdev, in, inlen, out, sizeof(out)); + if (!err) + *rqtn = MLX5_GET(create_rqt_out, out, rqtn); + + return err; +} + +int mlx5_vdpa_modify_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 rqtn) +{ + u32 out[MLX5_ST_SZ_DW(create_rqt_out)] = {}; + + MLX5_SET(modify_rqt_in, in, uid, mvdev->res.uid); + MLX5_SET(modify_rqt_in, in, rqtn, rqtn); + MLX5_SET(modify_rqt_in, in, opcode, MLX5_CMD_OP_MODIFY_RQT); + return mlx5_cmd_exec(mvdev->mdev, in, inlen, out, sizeof(out)); +} + +void mlx5_vdpa_destroy_rqt(struct mlx5_vdpa_dev *mvdev, u32 rqtn) +{ + u32 in[MLX5_ST_SZ_DW(destroy_rqt_in)] = {}; + + MLX5_SET(destroy_rqt_in, in, opcode, MLX5_CMD_OP_DESTROY_RQT); + MLX5_SET(destroy_rqt_in, in, uid, mvdev->res.uid); + MLX5_SET(destroy_rqt_in, in, rqtn, rqtn); + mlx5_cmd_exec_in(mvdev->mdev, destroy_rqt, in); +} + +int mlx5_vdpa_create_tir(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tirn) +{ + u32 out[MLX5_ST_SZ_DW(create_tir_out)] = {}; + int err; + + MLX5_SET(create_tir_in, in, opcode, MLX5_CMD_OP_CREATE_TIR); + err = mlx5_cmd_exec_inout(mvdev->mdev, create_tir, in, out); + if (!err) + *tirn = MLX5_GET(create_tir_out, out, tirn); + + return err; +} + +void mlx5_vdpa_destroy_tir(struct mlx5_vdpa_dev *mvdev, u32 tirn) +{ + u32 in[MLX5_ST_SZ_DW(destroy_tir_in)] = {}; + + MLX5_SET(destroy_tir_in, in, opcode, MLX5_CMD_OP_DESTROY_TIR); + MLX5_SET(destroy_tir_in, in, uid, mvdev->res.uid); + MLX5_SET(destroy_tir_in, in, tirn, tirn); + mlx5_cmd_exec_in(mvdev->mdev, destroy_tir, in); +} + +int mlx5_vdpa_alloc_transport_domain(struct mlx5_vdpa_dev *mvdev, u32 *tdn) +{ + u32 out[MLX5_ST_SZ_DW(alloc_transport_domain_out)] = {}; + u32 in[MLX5_ST_SZ_DW(alloc_transport_domain_in)] = {}; + int err; + + MLX5_SET(alloc_transport_domain_in, in, opcode, MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN); + MLX5_SET(alloc_transport_domain_in, in, uid, mvdev->res.uid); + + err = mlx5_cmd_exec_inout(mvdev->mdev, alloc_transport_domain, in, out); + if (!err) + *tdn = MLX5_GET(alloc_transport_domain_out, out, transport_domain); + + return err; +} + +void mlx5_vdpa_dealloc_transport_domain(struct mlx5_vdpa_dev *mvdev, u32 tdn) +{ + u32 in[MLX5_ST_SZ_DW(dealloc_transport_domain_in)] = {}; + + MLX5_SET(dealloc_transport_domain_in, in, opcode, MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN); + MLX5_SET(dealloc_transport_domain_in, in, uid, mvdev->res.uid); + MLX5_SET(dealloc_transport_domain_in, in, transport_domain, tdn); + mlx5_cmd_exec_in(mvdev->mdev, dealloc_transport_domain, in); +} + +int mlx5_vdpa_create_mkey(struct mlx5_vdpa_dev *mvdev, u32 *mkey, u32 *in, + int inlen) +{ + u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {}; + u32 mkey_index; + int err; + + MLX5_SET(create_mkey_in, in, opcode, MLX5_CMD_OP_CREATE_MKEY); + MLX5_SET(create_mkey_in, in, uid, mvdev->res.uid); + + err = mlx5_cmd_exec(mvdev->mdev, in, inlen, lout, sizeof(lout)); + if (err) + return err; + + mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index); + *mkey |= mlx5_idx_to_mkey(mkey_index); + return 0; +} + +int mlx5_vdpa_destroy_mkey(struct mlx5_vdpa_dev *mvdev, u32 mkey) +{ + u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)] = {}; + + MLX5_SET(destroy_mkey_in, in, uid, mvdev->res.uid); + MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY); + MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey)); + return mlx5_cmd_exec_in(mvdev->mdev, destroy_mkey, in); +} + +static int init_ctrl_vq(struct mlx5_vdpa_dev *mvdev) +{ + mvdev->cvq.iotlb = vhost_iotlb_alloc(0, 0); + if (!mvdev->cvq.iotlb) + return -ENOMEM; + + vringh_set_iotlb(&mvdev->cvq.vring, mvdev->cvq.iotlb, &mvdev->cvq.iommu_lock); + + return 0; +} + +static void cleanup_ctrl_vq(struct mlx5_vdpa_dev *mvdev) +{ + vhost_iotlb_free(mvdev->cvq.iotlb); +} + +int mlx5_vdpa_alloc_resources(struct mlx5_vdpa_dev *mvdev) +{ + u64 offset = MLX5_CAP64_DEV_VDPA_EMULATION(mvdev->mdev, doorbell_bar_offset); + struct mlx5_vdpa_resources *res = &mvdev->res; + struct mlx5_core_dev *mdev = mvdev->mdev; + u64 kick_addr; + int err; + + if (res->valid) { + mlx5_vdpa_warn(mvdev, "resources already allocated\n"); + return -EINVAL; + } + mutex_init(&mvdev->mr.mkey_mtx); + res->uar = mlx5_get_uars_page(mdev); + if (IS_ERR(res->uar)) { + err = PTR_ERR(res->uar); + goto err_uars; + } + + err = create_uctx(mvdev, &res->uid); + if (err) + goto err_uctx; + + err = alloc_pd(mvdev, &res->pdn, res->uid); + if (err) + goto err_pd; + + err = get_null_mkey(mvdev, &res->null_mkey); + if (err) + goto err_key; + + kick_addr = mdev->bar_addr + offset; + res->phys_kick_addr = kick_addr; + + res->kick_addr = ioremap(kick_addr, PAGE_SIZE); + if (!res->kick_addr) { + err = -ENOMEM; + goto err_key; + } + + err = init_ctrl_vq(mvdev); + if (err) + goto err_ctrl; + + res->valid = true; + + return 0; + +err_ctrl: + iounmap(res->kick_addr); +err_key: + dealloc_pd(mvdev, res->pdn, res->uid); +err_pd: + destroy_uctx(mvdev, res->uid); +err_uctx: + mlx5_put_uars_page(mdev, res->uar); +err_uars: + mutex_destroy(&mvdev->mr.mkey_mtx); + return err; +} + +void mlx5_vdpa_free_resources(struct mlx5_vdpa_dev *mvdev) +{ + struct mlx5_vdpa_resources *res = &mvdev->res; + + if (!res->valid) + return; + + cleanup_ctrl_vq(mvdev); + iounmap(res->kick_addr); + res->kick_addr = NULL; + dealloc_pd(mvdev, res->pdn, res->uid); + destroy_uctx(mvdev, res->uid); + mlx5_put_uars_page(mvdev->mdev, res->uar); + mutex_destroy(&mvdev->mr.mkey_mtx); + res->valid = false; +} |