1
2
3
4#include <linux/mlx5/driver.h>
5#include "mlx5_vdpa.h"
6
7static int alloc_pd(struct mlx5_vdpa_dev *dev, u32 *pdn, u16 uid)
8{
9 struct mlx5_core_dev *mdev = dev->mdev;
10
11 u32 out[MLX5_ST_SZ_DW(alloc_pd_out)] = {};
12 u32 in[MLX5_ST_SZ_DW(alloc_pd_in)] = {};
13 int err;
14
15 MLX5_SET(alloc_pd_in, in, opcode, MLX5_CMD_OP_ALLOC_PD);
16 MLX5_SET(alloc_pd_in, in, uid, uid);
17
18 err = mlx5_cmd_exec_inout(mdev, alloc_pd, in, out);
19 if (!err)
20 *pdn = MLX5_GET(alloc_pd_out, out, pd);
21
22 return err;
23}
24
25static int dealloc_pd(struct mlx5_vdpa_dev *dev, u32 pdn, u16 uid)
26{
27 u32 in[MLX5_ST_SZ_DW(dealloc_pd_in)] = {};
28 struct mlx5_core_dev *mdev = dev->mdev;
29
30 MLX5_SET(dealloc_pd_in, in, opcode, MLX5_CMD_OP_DEALLOC_PD);
31 MLX5_SET(dealloc_pd_in, in, pd, pdn);
32 MLX5_SET(dealloc_pd_in, in, uid, uid);
33 return mlx5_cmd_exec_in(mdev, dealloc_pd, in);
34}
35
36static int get_null_mkey(struct mlx5_vdpa_dev *dev, u32 *null_mkey)
37{
38 u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {};
39 u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)] = {};
40 struct mlx5_core_dev *mdev = dev->mdev;
41 int err;
42
43 MLX5_SET(query_special_contexts_in, in, opcode, MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
44 err = mlx5_cmd_exec_inout(mdev, query_special_contexts, in, out);
45 if (!err)
46 *null_mkey = MLX5_GET(query_special_contexts_out, out, null_mkey);
47 return err;
48}
49
50static int create_uctx(struct mlx5_vdpa_dev *mvdev, u16 *uid)
51{
52 u32 out[MLX5_ST_SZ_DW(create_uctx_out)] = {};
53 int inlen;
54 void *in;
55 int err;
56
57
58 if (!MLX5_CAP_GEN(mvdev->mdev, log_max_uctx))
59 return -EOPNOTSUPP;
60
61 inlen = MLX5_ST_SZ_BYTES(create_uctx_in);
62 in = kzalloc(inlen, GFP_KERNEL);
63 if (!in)
64 return -ENOMEM;
65
66 MLX5_SET(create_uctx_in, in, opcode, MLX5_CMD_OP_CREATE_UCTX);
67 MLX5_SET(create_uctx_in, in, uctx.cap, MLX5_UCTX_CAP_RAW_TX);
68
69 err = mlx5_cmd_exec(mvdev->mdev, in, inlen, out, sizeof(out));
70 kfree(in);
71 if (!err)
72 *uid = MLX5_GET(create_uctx_out, out, uid);
73
74 return err;
75}
76
77static void destroy_uctx(struct mlx5_vdpa_dev *mvdev, u32 uid)
78{
79 u32 out[MLX5_ST_SZ_DW(destroy_uctx_out)] = {};
80 u32 in[MLX5_ST_SZ_DW(destroy_uctx_in)] = {};
81
82 MLX5_SET(destroy_uctx_in, in, opcode, MLX5_CMD_OP_DESTROY_UCTX);
83 MLX5_SET(destroy_uctx_in, in, uid, uid);
84
85 mlx5_cmd_exec(mvdev->mdev, in, sizeof(in), out, sizeof(out));
86}
87
88int mlx5_vdpa_create_tis(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tisn)
89{
90 u32 out[MLX5_ST_SZ_DW(create_tis_out)] = {};
91 int err;
92
93 MLX5_SET(create_tis_in, in, opcode, MLX5_CMD_OP_CREATE_TIS);
94 MLX5_SET(create_tis_in, in, uid, mvdev->res.uid);
95 err = mlx5_cmd_exec_inout(mvdev->mdev, create_tis, in, out);
96 if (!err)
97 *tisn = MLX5_GET(create_tis_out, out, tisn);
98
99 return err;
100}
101
102void mlx5_vdpa_destroy_tis(struct mlx5_vdpa_dev *mvdev, u32 tisn)
103{
104 u32 in[MLX5_ST_SZ_DW(destroy_tis_in)] = {};
105
106 MLX5_SET(destroy_tis_in, in, opcode, MLX5_CMD_OP_DESTROY_TIS);
107 MLX5_SET(destroy_tis_in, in, uid, mvdev->res.uid);
108 MLX5_SET(destroy_tis_in, in, tisn, tisn);
109 mlx5_cmd_exec_in(mvdev->mdev, destroy_tis, in);
110}
111
112int mlx5_vdpa_create_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 *rqtn)
113{
114 u32 out[MLX5_ST_SZ_DW(create_rqt_out)] = {};
115 int err;
116
117 MLX5_SET(create_rqt_in, in, opcode, MLX5_CMD_OP_CREATE_RQT);
118 err = mlx5_cmd_exec(mvdev->mdev, in, inlen, out, sizeof(out));
119 if (!err)
120 *rqtn = MLX5_GET(create_rqt_out, out, rqtn);
121
122 return err;
123}
124
125void mlx5_vdpa_destroy_rqt(struct mlx5_vdpa_dev *mvdev, u32 rqtn)
126{
127 u32 in[MLX5_ST_SZ_DW(destroy_rqt_in)] = {};
128
129 MLX5_SET(destroy_rqt_in, in, opcode, MLX5_CMD_OP_DESTROY_RQT);
130 MLX5_SET(destroy_rqt_in, in, uid, mvdev->res.uid);
131 MLX5_SET(destroy_rqt_in, in, rqtn, rqtn);
132 mlx5_cmd_exec_in(mvdev->mdev, destroy_rqt, in);
133}
134
135int mlx5_vdpa_create_tir(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tirn)
136{
137 u32 out[MLX5_ST_SZ_DW(create_tir_out)] = {};
138 int err;
139
140 MLX5_SET(create_tir_in, in, opcode, MLX5_CMD_OP_CREATE_TIR);
141 err = mlx5_cmd_exec_inout(mvdev->mdev, create_tir, in, out);
142 if (!err)
143 *tirn = MLX5_GET(create_tir_out, out, tirn);
144
145 return err;
146}
147
148void mlx5_vdpa_destroy_tir(struct mlx5_vdpa_dev *mvdev, u32 tirn)
149{
150 u32 in[MLX5_ST_SZ_DW(destroy_tir_in)] = {};
151
152 MLX5_SET(destroy_tir_in, in, opcode, MLX5_CMD_OP_DESTROY_TIR);
153 MLX5_SET(destroy_tir_in, in, uid, mvdev->res.uid);
154 MLX5_SET(destroy_tir_in, in, tirn, tirn);
155 mlx5_cmd_exec_in(mvdev->mdev, destroy_tir, in);
156}
157
158int mlx5_vdpa_alloc_transport_domain(struct mlx5_vdpa_dev *mvdev, u32 *tdn)
159{
160 u32 out[MLX5_ST_SZ_DW(alloc_transport_domain_out)] = {};
161 u32 in[MLX5_ST_SZ_DW(alloc_transport_domain_in)] = {};
162 int err;
163
164 MLX5_SET(alloc_transport_domain_in, in, opcode, MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN);
165 MLX5_SET(alloc_transport_domain_in, in, uid, mvdev->res.uid);
166
167 err = mlx5_cmd_exec_inout(mvdev->mdev, alloc_transport_domain, in, out);
168 if (!err)
169 *tdn = MLX5_GET(alloc_transport_domain_out, out, transport_domain);
170
171 return err;
172}
173
174void mlx5_vdpa_dealloc_transport_domain(struct mlx5_vdpa_dev *mvdev, u32 tdn)
175{
176 u32 in[MLX5_ST_SZ_DW(dealloc_transport_domain_in)] = {};
177
178 MLX5_SET(dealloc_transport_domain_in, in, opcode, MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
179 MLX5_SET(dealloc_transport_domain_in, in, uid, mvdev->res.uid);
180 MLX5_SET(dealloc_transport_domain_in, in, transport_domain, tdn);
181 mlx5_cmd_exec_in(mvdev->mdev, dealloc_transport_domain, in);
182}
183
184int mlx5_vdpa_create_mkey(struct mlx5_vdpa_dev *mvdev, struct mlx5_core_mkey *mkey, u32 *in,
185 int inlen)
186{
187 u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {};
188 u32 mkey_index;
189 void *mkc;
190 int err;
191
192 MLX5_SET(create_mkey_in, in, opcode, MLX5_CMD_OP_CREATE_MKEY);
193 MLX5_SET(create_mkey_in, in, uid, mvdev->res.uid);
194
195 err = mlx5_cmd_exec(mvdev->mdev, in, inlen, lout, sizeof(lout));
196 if (err)
197 return err;
198
199 mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);
200 mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index);
201 mkey->iova = MLX5_GET64(mkc, mkc, start_addr);
202 mkey->size = MLX5_GET64(mkc, mkc, len);
203 mkey->key |= mlx5_idx_to_mkey(mkey_index);
204 mkey->pd = MLX5_GET(mkc, mkc, pd);
205 return 0;
206}
207
208int mlx5_vdpa_destroy_mkey(struct mlx5_vdpa_dev *mvdev, struct mlx5_core_mkey *mkey)
209{
210 u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)] = {};
211
212 MLX5_SET(destroy_mkey_in, in, uid, mvdev->res.uid);
213 MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY);
214 MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey->key));
215 return mlx5_cmd_exec_in(mvdev->mdev, destroy_mkey, in);
216}
217
218int mlx5_vdpa_alloc_resources(struct mlx5_vdpa_dev *mvdev)
219{
220 u64 offset = MLX5_CAP64_DEV_VDPA_EMULATION(mvdev->mdev, doorbell_bar_offset);
221 struct mlx5_vdpa_resources *res = &mvdev->res;
222 struct mlx5_core_dev *mdev = mvdev->mdev;
223 u64 kick_addr;
224 int err;
225
226 if (res->valid) {
227 mlx5_vdpa_warn(mvdev, "resources already allocated\n");
228 return -EINVAL;
229 }
230 mutex_init(&mvdev->mr.mkey_mtx);
231 res->uar = mlx5_get_uars_page(mdev);
232 if (IS_ERR(res->uar)) {
233 err = PTR_ERR(res->uar);
234 goto err_uars;
235 }
236
237 err = create_uctx(mvdev, &res->uid);
238 if (err)
239 goto err_uctx;
240
241 err = alloc_pd(mvdev, &res->pdn, res->uid);
242 if (err)
243 goto err_pd;
244
245 err = get_null_mkey(mvdev, &res->null_mkey);
246 if (err)
247 goto err_key;
248
249 kick_addr = pci_resource_start(mdev->pdev, 0) + offset;
250 res->kick_addr = ioremap(kick_addr, PAGE_SIZE);
251 if (!res->kick_addr) {
252 err = -ENOMEM;
253 goto err_key;
254 }
255 res->valid = true;
256
257 return 0;
258
259err_key:
260 dealloc_pd(mvdev, res->pdn, res->uid);
261err_pd:
262 destroy_uctx(mvdev, res->uid);
263err_uctx:
264 mlx5_put_uars_page(mdev, res->uar);
265err_uars:
266 mutex_destroy(&mvdev->mr.mkey_mtx);
267 return err;
268}
269
270void mlx5_vdpa_free_resources(struct mlx5_vdpa_dev *mvdev)
271{
272 struct mlx5_vdpa_resources *res = &mvdev->res;
273
274 if (!res->valid)
275 return;
276
277 iounmap(res->kick_addr);
278 res->kick_addr = NULL;
279 dealloc_pd(mvdev, res->pdn, res->uid);
280 destroy_uctx(mvdev, res->uid);
281 mlx5_put_uars_page(mvdev->mdev, res->uar);
282 mutex_destroy(&mvdev->mr.mkey_mtx);
283 res->valid = false;
284}
285
