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_udata *udata) 110 { 111 struct mana_ib_pd *pd = container_of(ibpd, struct mana_ib_pd, ibpd); 112 struct gdma_create_mr_params mr_params = {}; 113 struct ib_device *ibdev = ibpd->device; 114 struct mana_ib_dev *dev; 115 struct mana_ib_mr *mr; 116 u64 dma_region_handle; 117 int err; 118 119 dev = container_of(ibdev, struct mana_ib_dev, ib_dev); 120 121 ibdev_dbg(ibdev, 122 "start 0x%llx, iova 0x%llx length 0x%llx access_flags 0x%x", 123 start, iova, length, access_flags); 124 125 access_flags &= ~IB_ACCESS_OPTIONAL; 126 if (access_flags & ~VALID_MR_FLAGS) 127 return ERR_PTR(-EINVAL); 128 129 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 130 if (!mr) 131 return ERR_PTR(-ENOMEM); 132 133 mr->umem = ib_umem_get(ibdev, start, length, access_flags); 134 if (IS_ERR(mr->umem)) { 135 err = PTR_ERR(mr->umem); 136 ibdev_dbg(ibdev, 137 "Failed to get umem for register user-mr, %d\n", err); 138 goto err_free; 139 } 140 141 err = mana_ib_create_dma_region(dev, mr->umem, &dma_region_handle, iova); 142 if (err) { 143 ibdev_dbg(ibdev, "Failed create dma region for user-mr, %d\n", 144 err); 145 goto err_umem; 146 } 147 148 ibdev_dbg(ibdev, 149 "created dma region for user-mr 0x%llx\n", 150 dma_region_handle); 151 152 mr_params.pd_handle = pd->pd_handle; 153 if (access_flags & IB_ZERO_BASED) { 154 mr_params.mr_type = GDMA_MR_TYPE_ZBVA; 155 mr_params.zbva.dma_region_handle = dma_region_handle; 156 mr_params.zbva.access_flags = 157 mana_ib_verbs_to_gdma_access_flags(access_flags); 158 } else { 159 mr_params.mr_type = GDMA_MR_TYPE_GVA; 160 mr_params.gva.dma_region_handle = dma_region_handle; 161 mr_params.gva.virtual_address = iova; 162 mr_params.gva.access_flags = 163 mana_ib_verbs_to_gdma_access_flags(access_flags); 164 } 165 166 err = mana_ib_gd_create_mr(dev, mr, &mr_params); 167 if (err) 168 goto err_dma_region; 169 170 /* 171 * There is no need to keep track of dma_region_handle after MR is 172 * successfully created. The dma_region_handle is tracked in the PF 173 * as part of the lifecycle of this MR. 174 */ 175 176 return &mr->ibmr; 177 178 err_dma_region: 179 mana_gd_destroy_dma_region(mdev_to_gc(dev), dma_region_handle); 180 181 err_umem: 182 ib_umem_release(mr->umem); 183 184 err_free: 185 kfree(mr); 186 return ERR_PTR(err); 187 } 188 189 struct ib_mr *mana_ib_reg_user_mr_dmabuf(struct ib_pd *ibpd, u64 start, u64 length, 190 u64 iova, int fd, int access_flags, 191 struct uverbs_attr_bundle *attrs) 192 { 193 struct mana_ib_pd *pd = container_of(ibpd, struct mana_ib_pd, ibpd); 194 struct gdma_create_mr_params mr_params = {}; 195 struct ib_device *ibdev = ibpd->device; 196 struct ib_umem_dmabuf *umem_dmabuf; 197 struct mana_ib_dev *dev; 198 struct mana_ib_mr *mr; 199 u64 dma_region_handle; 200 int err; 201 202 dev = container_of(ibdev, struct mana_ib_dev, ib_dev); 203 204 access_flags &= ~IB_ACCESS_OPTIONAL; 205 if (access_flags & ~VALID_MR_FLAGS) 206 return ERR_PTR(-EOPNOTSUPP); 207 208 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 209 if (!mr) 210 return ERR_PTR(-ENOMEM); 211 212 umem_dmabuf = ib_umem_dmabuf_get_pinned(ibdev, start, length, fd, access_flags); 213 if (IS_ERR(umem_dmabuf)) { 214 err = PTR_ERR(umem_dmabuf); 215 ibdev_dbg(ibdev, "Failed to get dmabuf umem, %d\n", err); 216 goto err_free; 217 } 218 219 mr->umem = &umem_dmabuf->umem; 220 221 err = mana_ib_create_dma_region(dev, mr->umem, &dma_region_handle, iova); 222 if (err) { 223 ibdev_dbg(ibdev, "Failed create dma region for user-mr, %d\n", 224 err); 225 goto err_umem; 226 } 227 228 mr_params.pd_handle = pd->pd_handle; 229 mr_params.mr_type = GDMA_MR_TYPE_GVA; 230 mr_params.gva.dma_region_handle = dma_region_handle; 231 mr_params.gva.virtual_address = iova; 232 mr_params.gva.access_flags = 233 mana_ib_verbs_to_gdma_access_flags(access_flags); 234 235 err = mana_ib_gd_create_mr(dev, mr, &mr_params); 236 if (err) 237 goto err_dma_region; 238 239 /* 240 * There is no need to keep track of dma_region_handle after MR is 241 * successfully created. The dma_region_handle is tracked in the PF 242 * as part of the lifecycle of this MR. 243 */ 244 245 return &mr->ibmr; 246 247 err_dma_region: 248 mana_gd_destroy_dma_region(mdev_to_gc(dev), dma_region_handle); 249 250 err_umem: 251 ib_umem_release(mr->umem); 252 253 err_free: 254 kfree(mr); 255 return ERR_PTR(err); 256 } 257 258 struct ib_mr *mana_ib_get_dma_mr(struct ib_pd *ibpd, int access_flags) 259 { 260 struct mana_ib_pd *pd = container_of(ibpd, struct mana_ib_pd, ibpd); 261 struct gdma_create_mr_params mr_params = {}; 262 struct ib_device *ibdev = ibpd->device; 263 struct mana_ib_dev *dev; 264 struct mana_ib_mr *mr; 265 int err; 266 267 dev = container_of(ibdev, struct mana_ib_dev, ib_dev); 268 269 if (access_flags & ~VALID_DMA_MR_FLAGS) 270 return ERR_PTR(-EINVAL); 271 272 mr = kzalloc(sizeof(*mr), GFP_KERNEL); 273 if (!mr) 274 return ERR_PTR(-ENOMEM); 275 276 mr_params.pd_handle = pd->pd_handle; 277 mr_params.mr_type = GDMA_MR_TYPE_GPA; 278 279 err = mana_ib_gd_create_mr(dev, mr, &mr_params); 280 if (err) 281 goto err_free; 282 283 return &mr->ibmr; 284 285 err_free: 286 kfree(mr); 287 return ERR_PTR(err); 288 } 289 290 int mana_ib_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) 291 { 292 struct mana_ib_mr *mr = container_of(ibmr, struct mana_ib_mr, ibmr); 293 struct ib_device *ibdev = ibmr->device; 294 struct mana_ib_dev *dev; 295 int err; 296 297 dev = container_of(ibdev, struct mana_ib_dev, ib_dev); 298 299 err = mana_ib_gd_destroy_mr(dev, mr->mr_handle); 300 if (err) 301 return err; 302 303 if (mr->umem) 304 ib_umem_release(mr->umem); 305 306 kfree(mr); 307 308 return 0; 309 } 310