1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2022, Microsoft Corporation. All rights reserved. 4 */ 5 6 #include "mana_ib.h" 7 8 #define VALID_MR_FLAGS (IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | IB_ACCESS_REMOTE_READ |\ 9 IB_ACCESS_REMOTE_ATOMIC | IB_ZERO_BASED) 10 11 #define VALID_DMA_MR_FLAGS (IB_ACCESS_LOCAL_WRITE) 12 13 static enum gdma_mr_access_flags 14 mana_ib_verbs_to_gdma_access_flags(int access_flags) 15 { 16 enum gdma_mr_access_flags flags = GDMA_ACCESS_FLAG_LOCAL_READ; 17 18 if (access_flags & IB_ACCESS_LOCAL_WRITE) 19 flags |= GDMA_ACCESS_FLAG_LOCAL_WRITE; 20 21 if (access_flags & IB_ACCESS_REMOTE_WRITE) 22 flags |= GDMA_ACCESS_FLAG_REMOTE_WRITE; 23 24 if (access_flags & IB_ACCESS_REMOTE_READ) 25 flags |= GDMA_ACCESS_FLAG_REMOTE_READ; 26 27 if (access_flags & IB_ACCESS_REMOTE_ATOMIC) 28 flags |= GDMA_ACCESS_FLAG_REMOTE_ATOMIC; 29 30 return flags; 31 } 32 33 static int mana_ib_gd_create_mr(struct mana_ib_dev *dev, struct mana_ib_mr *mr, 34 struct gdma_create_mr_params *mr_params) 35 { 36 struct gdma_create_mr_response resp = {}; 37 struct gdma_create_mr_request req = {}; 38 struct gdma_context *gc = mdev_to_gc(dev); 39 int err; 40 41 mana_gd_init_req_hdr(&req.hdr, GDMA_CREATE_MR, sizeof(req), 42 sizeof(resp)); 43 req.pd_handle = mr_params->pd_handle; 44 req.mr_type = mr_params->mr_type; 45 46 switch (mr_params->mr_type) { 47 case GDMA_MR_TYPE_GPA: 48 break; 49 case GDMA_MR_TYPE_GVA: 50 req.gva.dma_region_handle = mr_params->gva.dma_region_handle; 51 req.gva.virtual_address = mr_params->gva.virtual_address; 52 req.gva.access_flags = mr_params->gva.access_flags; 53 break; 54 case GDMA_MR_TYPE_ZBVA: 55 req.zbva.dma_region_handle = mr_params->zbva.dma_region_handle; 56 req.zbva.access_flags = mr_params->zbva.access_flags; 57 break; 58 default: 59 ibdev_dbg(&dev->ib_dev, 60 "invalid param (GDMA_MR_TYPE) passed, type %d\n", 61 req.mr_type); 62 return -EINVAL; 63 } 64 65 err = mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp), &resp); 66 67 if (err || resp.hdr.status) { 68 ibdev_dbg(&dev->ib_dev, "Failed to create mr %d, %u", err, 69 resp.hdr.status); 70 if (!err) 71 err = -EPROTO; 72 73 return err; 74 } 75 76 mr->ibmr.lkey = resp.lkey; 77 mr->ibmr.rkey = resp.rkey; 78 mr->mr_handle = resp.mr_handle; 79 80 return 0; 81 } 82 83 static int mana_ib_gd_destroy_mr(struct mana_ib_dev *dev, u64 mr_handle) 84 { 85 struct gdma_destroy_mr_response resp = {}; 86 struct gdma_destroy_mr_request req = {}; 87 struct gdma_context *gc = mdev_to_gc(dev); 88 int err; 89 90 mana_gd_init_req_hdr(&req.hdr, GDMA_DESTROY_MR, sizeof(req), 91 sizeof(resp)); 92 93 req.mr_handle = mr_handle; 94 95 err = mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp), &resp); 96 if (err || resp.hdr.status) { 97 dev_err(gc->dev, "Failed to destroy MR: %d, 0x%x\n", err, 98 resp.hdr.status); 99 if (!err) 100 err = -EPROTO; 101 return err; 102 } 103 104 return 0; 105 } 106 107 struct ib_mr *mana_ib_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 length, 108 u64 iova, int access_flags, 109 struct ib_dmah *dmah, 110 struct ib_udata *udata) 111 { 112 struct mana_ib_pd *pd = container_of(ibpd, struct mana_ib_pd, ibpd); 113 struct gdma_create_mr_params mr_params = {}; 114 struct ib_device *ibdev = ibpd->device; 115 struct mana_ib_dev *dev; 116 struct mana_ib_mr *mr; 117 u64 dma_region_handle; 118 int err; 119 120 if (dmah) 121 return ERR_PTR(-EOPNOTSUPP); 122 123 dev = container_of(ibdev, struct mana_ib_dev, ib_dev); 124 125 ibdev_dbg(ibdev, 126 "start 0x%llx, iova 0x%llx length 0x%llx access_flags 0x%x", 127 start, iova, length, access_flags); 128 129 access_flags &= ~IB_ACCESS_OPTIONAL; 130 if (access_flags & ~VALID_MR_FLAGS) 131 return ERR_PTR(-EINVAL); 132 133 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 134 if (!mr) 135 return ERR_PTR(-ENOMEM); 136 137 mr->umem = ib_umem_get(ibdev, start, length, access_flags); 138 if (IS_ERR(mr->umem)) { 139 err = PTR_ERR(mr->umem); 140 ibdev_dbg(ibdev, 141 "Failed to get umem for register user-mr, %d\n", err); 142 goto err_free; 143 } 144 145 err = mana_ib_create_dma_region(dev, mr->umem, &dma_region_handle, iova); 146 if (err) { 147 ibdev_dbg(ibdev, "Failed create dma region for user-mr, %d\n", 148 err); 149 goto err_umem; 150 } 151 152 ibdev_dbg(ibdev, 153 "created dma region for user-mr 0x%llx\n", 154 dma_region_handle); 155 156 mr_params.pd_handle = pd->pd_handle; 157 if (access_flags & IB_ZERO_BASED) { 158 mr_params.mr_type = GDMA_MR_TYPE_ZBVA; 159 mr_params.zbva.dma_region_handle = dma_region_handle; 160 mr_params.zbva.access_flags = 161 mana_ib_verbs_to_gdma_access_flags(access_flags); 162 } else { 163 mr_params.mr_type = GDMA_MR_TYPE_GVA; 164 mr_params.gva.dma_region_handle = dma_region_handle; 165 mr_params.gva.virtual_address = iova; 166 mr_params.gva.access_flags = 167 mana_ib_verbs_to_gdma_access_flags(access_flags); 168 } 169 170 err = mana_ib_gd_create_mr(dev, mr, &mr_params); 171 if (err) 172 goto err_dma_region; 173 174 /* 175 * There is no need to keep track of dma_region_handle after MR is 176 * successfully created. The dma_region_handle is tracked in the PF 177 * as part of the lifecycle of this MR. 178 */ 179 180 return &mr->ibmr; 181 182 err_dma_region: 183 mana_gd_destroy_dma_region(mdev_to_gc(dev), dma_region_handle); 184 185 err_umem: 186 ib_umem_release(mr->umem); 187 188 err_free: 189 kfree(mr); 190 return ERR_PTR(err); 191 } 192 193 struct ib_mr *mana_ib_reg_user_mr_dmabuf(struct ib_pd *ibpd, u64 start, u64 length, 194 u64 iova, int fd, int access_flags, 195 struct ib_dmah *dmah, 196 struct uverbs_attr_bundle *attrs) 197 { 198 struct mana_ib_pd *pd = container_of(ibpd, struct mana_ib_pd, ibpd); 199 struct gdma_create_mr_params mr_params = {}; 200 struct ib_device *ibdev = ibpd->device; 201 struct ib_umem_dmabuf *umem_dmabuf; 202 struct mana_ib_dev *dev; 203 struct mana_ib_mr *mr; 204 u64 dma_region_handle; 205 int err; 206 207 if (dmah) 208 return ERR_PTR(-EOPNOTSUPP); 209 210 dev = container_of(ibdev, struct mana_ib_dev, ib_dev); 211 212 access_flags &= ~IB_ACCESS_OPTIONAL; 213 if (access_flags & ~VALID_MR_FLAGS) 214 return ERR_PTR(-EOPNOTSUPP); 215 216 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 217 if (!mr) 218 return ERR_PTR(-ENOMEM); 219 220 umem_dmabuf = ib_umem_dmabuf_get_pinned(ibdev, start, length, fd, access_flags); 221 if (IS_ERR(umem_dmabuf)) { 222 err = PTR_ERR(umem_dmabuf); 223 ibdev_dbg(ibdev, "Failed to get dmabuf umem, %d\n", err); 224 goto err_free; 225 } 226 227 mr->umem = &umem_dmabuf->umem; 228 229 err = mana_ib_create_dma_region(dev, mr->umem, &dma_region_handle, iova); 230 if (err) { 231 ibdev_dbg(ibdev, "Failed create dma region for user-mr, %d\n", 232 err); 233 goto err_umem; 234 } 235 236 mr_params.pd_handle = pd->pd_handle; 237 mr_params.mr_type = GDMA_MR_TYPE_GVA; 238 mr_params.gva.dma_region_handle = dma_region_handle; 239 mr_params.gva.virtual_address = iova; 240 mr_params.gva.access_flags = 241 mana_ib_verbs_to_gdma_access_flags(access_flags); 242 243 err = mana_ib_gd_create_mr(dev, mr, &mr_params); 244 if (err) 245 goto err_dma_region; 246 247 /* 248 * There is no need to keep track of dma_region_handle after MR is 249 * successfully created. The dma_region_handle is tracked in the PF 250 * as part of the lifecycle of this MR. 251 */ 252 253 return &mr->ibmr; 254 255 err_dma_region: 256 mana_gd_destroy_dma_region(mdev_to_gc(dev), dma_region_handle); 257 258 err_umem: 259 ib_umem_release(mr->umem); 260 261 err_free: 262 kfree(mr); 263 return ERR_PTR(err); 264 } 265 266 struct ib_mr *mana_ib_get_dma_mr(struct ib_pd *ibpd, int access_flags) 267 { 268 struct mana_ib_pd *pd = container_of(ibpd, struct mana_ib_pd, ibpd); 269 struct gdma_create_mr_params mr_params = {}; 270 struct ib_device *ibdev = ibpd->device; 271 struct mana_ib_dev *dev; 272 struct mana_ib_mr *mr; 273 int err; 274 275 dev = container_of(ibdev, struct mana_ib_dev, ib_dev); 276 277 if (access_flags & ~VALID_DMA_MR_FLAGS) 278 return ERR_PTR(-EINVAL); 279 280 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 281 if (!mr) 282 return ERR_PTR(-ENOMEM); 283 284 mr_params.pd_handle = pd->pd_handle; 285 mr_params.mr_type = GDMA_MR_TYPE_GPA; 286 287 err = mana_ib_gd_create_mr(dev, mr, &mr_params); 288 if (err) 289 goto err_free; 290 291 return &mr->ibmr; 292 293 err_free: 294 kfree(mr); 295 return ERR_PTR(err); 296 } 297 298 int mana_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) 299 { 300 struct mana_ib_mr *mr = container_of(ibmr, struct mana_ib_mr, ibmr); 301 struct ib_device *ibdev = ibmr->device; 302 struct mana_ib_dev *dev; 303 int err; 304 305 dev = container_of(ibdev, struct mana_ib_dev, ib_dev); 306 307 err = mana_ib_gd_destroy_mr(dev, mr->mr_handle); 308 if (err) 309 return err; 310 311 if (mr->umem) 312 ib_umem_release(mr->umem); 313 314 kfree(mr); 315 316 return 0; 317 } 318