324 lines
8.5 KiB
C
324 lines
8.5 KiB
C
|
// 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;
|
||
|
|
|
||
|
|
spin_lock_init(&mvdev->cvq.iommu_lock);
|
||
|
|
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;
|
||
|
|
}
|