1
2
3
4#include <linux/iova.h>
5#include <linux/mlx5/driver.h>
6#include "mlx5_vdpa.h"
7
8static int alloc_pd(struct mlx5_vdpa_dev *dev, u32 *pdn, u16 uid)
9{
10 struct mlx5_core_dev *mdev = dev->mdev;
11
12 u32 out[MLX5_ST_SZ_DW(alloc_pd_out)] = {};
13 u32 in[MLX5_ST_SZ_DW(alloc_pd_in)] = {};
14 int err;
15
16 MLX5_SET(alloc_pd_in, in, opcode, MLX5_CMD_OP_ALLOC_PD);
17 MLX5_SET(alloc_pd_in, in, uid, uid);
18
19 err = mlx5_cmd_exec_inout(mdev, alloc_pd, in, out);
20 if (!err)
21 *pdn = MLX5_GET(alloc_pd_out, out, pd);
22
23 return err;
24}
25
26static int dealloc_pd(struct mlx5_vdpa_dev *dev, u32 pdn, u16 uid)
27{
28 u32 in[MLX5_ST_SZ_DW(dealloc_pd_in)] = {};
29 struct mlx5_core_dev *mdev = dev->mdev;
30
31 MLX5_SET(dealloc_pd_in, in, opcode, MLX5_CMD_OP_DEALLOC_PD);
32 MLX5_SET(dealloc_pd_in, in, pd, pdn);
33 MLX5_SET(dealloc_pd_in, in, uid, uid);
34 return mlx5_cmd_exec_in(mdev, dealloc_pd, in);
35}
36
37static int get_null_mkey(struct mlx5_vdpa_dev *dev, u32 *null_mkey)
38{
39 u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {};
40 u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)] = {};
41 struct mlx5_core_dev *mdev = dev->mdev;
42 int err;
43
44 MLX5_SET(query_special_contexts_in, in, opcode, MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
45 err = mlx5_cmd_exec_inout(mdev, query_special_contexts, in, out);
46 if (!err)
47 *null_mkey = MLX5_GET(query_special_contexts_out, out, null_mkey);
48 return err;
49}
50
51static int create_uctx(struct mlx5_vdpa_dev *mvdev, u16 *uid)
52{
53 u32 out[MLX5_ST_SZ_DW(create_uctx_out)] = {};
54 int inlen;
55 void *in;
56 int err;
57
58 if (MLX5_CAP_GEN(mvdev->mdev, umem_uid_0))
59 return 0;
60
61
62 if (!MLX5_CAP_GEN(mvdev->mdev, log_max_uctx))
63 return -EOPNOTSUPP;
64
65 inlen = MLX5_ST_SZ_BYTES(create_uctx_in);
66 in = kzalloc(inlen, GFP_KERNEL);
67 if (!in)
68 return -ENOMEM;
69
70 MLX5_SET(create_uctx_in, in, opcode, MLX5_CMD_OP_CREATE_UCTX);
71 MLX5_SET(create_uctx_in, in, uctx.cap, MLX5_UCTX_CAP_RAW_TX);
72
73 err = mlx5_cmd_exec(mvdev->mdev, in, inlen, out, sizeof(out));
74 kfree(in);
75 if (!err)
76 *uid = MLX5_GET(create_uctx_out, out, uid);
77
78 return err;
79}
80
81static void destroy_uctx(struct mlx5_vdpa_dev *mvdev, u32 uid)
82{
83 u32 out[MLX5_ST_SZ_DW(destroy_uctx_out)] = {};
84 u32 in[MLX5_ST_SZ_DW(destroy_uctx_in)] = {};
85
86 if (!uid)
87 return;
88
89 MLX5_SET(destroy_uctx_in, in, opcode, MLX5_CMD_OP_DESTROY_UCTX);
90 MLX5_SET(destroy_uctx_in, in, uid, uid);
91
92 mlx5_cmd_exec(mvdev->mdev, in, sizeof(in), out, sizeof(out));
93}
94
95int mlx5_vdpa_create_tis(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tisn)
96{
97 u32 out[MLX5_ST_SZ_DW(create_tis_out)] = {};
98 int err;
99
100 MLX5_SET(create_tis_in, in, opcode, MLX5_CMD_OP_CREATE_TIS);
101 MLX5_SET(create_tis_in, in, uid, mvdev->res.uid);
102 err = mlx5_cmd_exec_inout(mvdev->mdev, create_tis, in, out);
103 if (!err)
104 *tisn = MLX5_GET(create_tis_out, out, tisn);
105
106 return err;
107}
108
109void mlx5_vdpa_destroy_tis(struct mlx5_vdpa_dev *mvdev, u32 tisn)
110{
111 u32 in[MLX5_ST_SZ_DW(destroy_tis_in)] = {};
112
113 MLX5_SET(destroy_tis_in, in, opcode, MLX5_CMD_OP_DESTROY_TIS);
114 MLX5_SET(destroy_tis_in, in, uid, mvdev->res.uid);
115 MLX5_SET(destroy_tis_in, in, tisn, tisn);
116 mlx5_cmd_exec_in(mvdev->mdev, destroy_tis, in);
117}
118
119int mlx5_vdpa_create_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 *rqtn)
120{
121 u32 out[MLX5_ST_SZ_DW(create_rqt_out)] = {};
122 int err;
123
124 MLX5_SET(create_rqt_in, in, opcode, MLX5_CMD_OP_CREATE_RQT);
125 err = mlx5_cmd_exec(mvdev->mdev, in, inlen, out, sizeof(out));
126 if (!err)
127 *rqtn = MLX5_GET(create_rqt_out, out, rqtn);
128
129 return err;
130}
131
132int mlx5_vdpa_modify_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 rqtn)
133{
134 u32 out[MLX5_ST_SZ_DW(create_rqt_out)] = {};
135
136 MLX5_SET(modify_rqt_in, in, uid, mvdev->res.uid);
137 MLX5_SET(modify_rqt_in, in, rqtn, rqtn);
138 MLX5_SET(modify_rqt_in, in, opcode, MLX5_CMD_OP_MODIFY_RQT);
139 return mlx5_cmd_exec(mvdev->mdev, in, inlen, out, sizeof(out));
140}
141
142void mlx5_vdpa_destroy_rqt(struct mlx5_vdpa_dev *mvdev, u32 rqtn)
143{
144 u32 in[MLX5_ST_SZ_DW(destroy_rqt_in)] = {};
145
146 MLX5_SET(destroy_rqt_in, in, opcode, MLX5_CMD_OP_DESTROY_RQT);
147 MLX5_SET(destroy_rqt_in, in, uid, mvdev->res.uid);
148 MLX5_SET(destroy_rqt_in, in, rqtn, rqtn);
149 mlx5_cmd_exec_in(mvdev->mdev, destroy_rqt, in);
150}
151
152int mlx5_vdpa_create_tir(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tirn)
153{
154 u32 out[MLX5_ST_SZ_DW(create_tir_out)] = {};
155 int err;
156
157 MLX5_SET(create_tir_in, in, opcode, MLX5_CMD_OP_CREATE_TIR);
158 err = mlx5_cmd_exec_inout(mvdev->mdev, create_tir, in, out);
159 if (!err)
160 *tirn = MLX5_GET(create_tir_out, out, tirn);
161
162 return err;
163}
164
165void mlx5_vdpa_destroy_tir(struct mlx5_vdpa_dev *mvdev, u32 tirn)
166{
167 u32 in[MLX5_ST_SZ_DW(destroy_tir_in)] = {};
168
169 MLX5_SET(destroy_tir_in, in, opcode, MLX5_CMD_OP_DESTROY_TIR);
170 MLX5_SET(destroy_tir_in, in, uid, mvdev->res.uid);
171 MLX5_SET(destroy_tir_in, in, tirn, tirn);
172 mlx5_cmd_exec_in(mvdev->mdev, destroy_tir, in);
173}
174
175int mlx5_vdpa_alloc_transport_domain(struct mlx5_vdpa_dev *mvdev, u32 *tdn)
176{
177 u32 out[MLX5_ST_SZ_DW(alloc_transport_domain_out)] = {};
178 u32 in[MLX5_ST_SZ_DW(alloc_transport_domain_in)] = {};
179 int err;
180
181 MLX5_SET(alloc_transport_domain_in, in, opcode, MLX5_CMD_OP_ALLOC_TRANSPORT_DOMAIN);
182 MLX5_SET(alloc_transport_domain_in, in, uid, mvdev->res.uid);
183
184 err = mlx5_cmd_exec_inout(mvdev->mdev, alloc_transport_domain, in, out);
185 if (!err)
186 *tdn = MLX5_GET(alloc_transport_domain_out, out, transport_domain);
187
188 return err;
189}
190
191void mlx5_vdpa_dealloc_transport_domain(struct mlx5_vdpa_dev *mvdev, u32 tdn)
192{
193 u32 in[MLX5_ST_SZ_DW(dealloc_transport_domain_in)] = {};
194
195 MLX5_SET(dealloc_transport_domain_in, in, opcode, MLX5_CMD_OP_DEALLOC_TRANSPORT_DOMAIN);
196 MLX5_SET(dealloc_transport_domain_in, in, uid, mvdev->res.uid);
197 MLX5_SET(dealloc_transport_domain_in, in, transport_domain, tdn);
198 mlx5_cmd_exec_in(mvdev->mdev, dealloc_transport_domain, in);
199}
200
201int mlx5_vdpa_create_mkey(struct mlx5_vdpa_dev *mvdev, u32 *mkey, u32 *in,
202 int inlen)
203{
204 u32 lout[MLX5_ST_SZ_DW(create_mkey_out)] = {};
205 u32 mkey_index;
206 int err;
207
208 MLX5_SET(create_mkey_in, in, opcode, MLX5_CMD_OP_CREATE_MKEY);
209 MLX5_SET(create_mkey_in, in, uid, mvdev->res.uid);
210
211 err = mlx5_cmd_exec(mvdev->mdev, in, inlen, lout, sizeof(lout));
212 if (err)
213 return err;
214
215 mkey_index = MLX5_GET(create_mkey_out, lout, mkey_index);
216 *mkey |= mlx5_idx_to_mkey(mkey_index);
217 return 0;
218}
219
220int mlx5_vdpa_destroy_mkey(struct mlx5_vdpa_dev *mvdev, u32 mkey)
221{
222 u32 in[MLX5_ST_SZ_DW(destroy_mkey_in)] = {};
223
224 MLX5_SET(destroy_mkey_in, in, uid, mvdev->res.uid);
225 MLX5_SET(destroy_mkey_in, in, opcode, MLX5_CMD_OP_DESTROY_MKEY);
226 MLX5_SET(destroy_mkey_in, in, mkey_index, mlx5_mkey_to_idx(mkey));
227 return mlx5_cmd_exec_in(mvdev->mdev, destroy_mkey, in);
228}
229
230static int init_ctrl_vq(struct mlx5_vdpa_dev *mvdev)
231{
232 mvdev->cvq.iotlb = vhost_iotlb_alloc(0, 0);
233 if (!mvdev->cvq.iotlb)
234 return -ENOMEM;
235
236 vringh_set_iotlb(&mvdev->cvq.vring, mvdev->cvq.iotlb, &mvdev->cvq.iommu_lock);
237
238 return 0;
239}
240
241static void cleanup_ctrl_vq(struct mlx5_vdpa_dev *mvdev)
242{
243 vhost_iotlb_free(mvdev->cvq.iotlb);
244}
245
246int mlx5_vdpa_alloc_resources(struct mlx5_vdpa_dev *mvdev)
247{
248 u64 offset = MLX5_CAP64_DEV_VDPA_EMULATION(mvdev->mdev, doorbell_bar_offset);
249 struct mlx5_vdpa_resources *res = &mvdev->res;
250 struct mlx5_core_dev *mdev = mvdev->mdev;
251 u64 kick_addr;
252 int err;
253
254 if (res->valid) {
255 mlx5_vdpa_warn(mvdev, "resources already allocated\n");
256 return -EINVAL;
257 }
258 mutex_init(&mvdev->mr.mkey_mtx);
259 res->uar = mlx5_get_uars_page(mdev);
260 if (IS_ERR(res->uar)) {
261 err = PTR_ERR(res->uar);
262 goto err_uars;
263 }
264
265 err = create_uctx(mvdev, &res->uid);
266 if (err)
267 goto err_uctx;
268
269 err = alloc_pd(mvdev, &res->pdn, res->uid);
270 if (err)
271 goto err_pd;
272
273 err = get_null_mkey(mvdev, &res->null_mkey);
274 if (err)
275 goto err_key;
276
277 kick_addr = mdev->bar_addr + offset;
278 res->phys_kick_addr = kick_addr;
279
280 res->kick_addr = ioremap(kick_addr, PAGE_SIZE);
281 if (!res->kick_addr) {
282 err = -ENOMEM;
283 goto err_key;
284 }
285
286 err = init_ctrl_vq(mvdev);
287 if (err)
288 goto err_ctrl;
289
290 res->valid = true;
291
292 return 0;
293
294err_ctrl:
295 iounmap(res->kick_addr);
296err_key:
297 dealloc_pd(mvdev, res->pdn, res->uid);
298err_pd:
299 destroy_uctx(mvdev, res->uid);
300err_uctx:
301 mlx5_put_uars_page(mdev, res->uar);
302err_uars:
303 mutex_destroy(&mvdev->mr.mkey_mtx);
304 return err;
305}
306
307void mlx5_vdpa_free_resources(struct mlx5_vdpa_dev *mvdev)
308{
309 struct mlx5_vdpa_resources *res = &mvdev->res;
310
311 if (!res->valid)
312 return;
313
314 cleanup_ctrl_vq(mvdev);
315 iounmap(res->kick_addr);
316 res->kick_addr = NULL;
317 dealloc_pd(mvdev, res->pdn, res->uid);
318 destroy_uctx(mvdev, res->uid);
319 mlx5_put_uars_page(mvdev->mdev, res->uar);
320 mutex_destroy(&mvdev->mr.mkey_mtx);
321 res->valid = false;
322}
323
