1 /* 2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #include "mlx4_ib.h" 34 35 static u32 convert_access(int acc) 36 { 37 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC : 0) | 38 (acc & IB_ACCESS_REMOTE_WRITE ? MLX4_PERM_REMOTE_WRITE : 0) | 39 (acc & IB_ACCESS_REMOTE_READ ? MLX4_PERM_REMOTE_READ : 0) | 40 (acc & IB_ACCESS_LOCAL_WRITE ? MLX4_PERM_LOCAL_WRITE : 0) | 41 MLX4_PERM_LOCAL_READ; 42 } 43 44 struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc) 45 { 46 struct mlx4_ib_mr *mr; 47 int err; 48 49 mr = kmalloc(sizeof *mr, GFP_KERNEL); 50 if (!mr) 51 return ERR_PTR(-ENOMEM); 52 53 err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0, 54 ~0ull, convert_access(acc), 0, 0, &mr->mmr); 55 if (err) 56 goto err_free; 57 58 err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr); 59 if (err) 60 goto err_mr; 61 62 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; 63 mr->umem = NULL; 64 65 return &mr->ibmr; 66 67 err_mr: 68 mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr); 69 70 err_free: 71 kfree(mr); 72 73 return ERR_PTR(err); 74 } 75 76 int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt, 77 struct ib_umem *umem) 78 { 79 u64 *pages; 80 struct ib_umem_chunk *chunk; 81 int i, j, k; 82 int n; 83 int len; 84 int err = 0; 85 86 pages = (u64 *) __get_free_page(GFP_KERNEL); 87 if (!pages) 88 return -ENOMEM; 89 90 i = n = 0; 91 92 list_for_each_entry(chunk, &umem->chunk_list, list) 93 for (j = 0; j < chunk->nmap; ++j) { 94 len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift; 95 for (k = 0; k < len; ++k) { 96 pages[i++] = sg_dma_address(&chunk->page_list[j]) + 97 umem->page_size * k; 98 /* 99 * Be friendly to mlx4_write_mtt() and 100 * pass it chunks of appropriate size. 101 */ 102 if (i == PAGE_SIZE / sizeof (u64)) { 103 err = mlx4_write_mtt(dev->dev, mtt, n, 104 i, pages); 105 if (err) 106 goto out; 107 n += i; 108 i = 0; 109 } 110 } 111 } 112 113 if (i) 114 err = mlx4_write_mtt(dev->dev, mtt, n, i, pages); 115 116 out: 117 free_page((unsigned long) pages); 118 return err; 119 } 120 121 struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, 122 u64 virt_addr, int access_flags, 123 struct ib_udata *udata) 124 { 125 struct mlx4_ib_dev *dev = to_mdev(pd->device); 126 struct mlx4_ib_mr *mr; 127 int shift; 128 int err; 129 int n; 130 131 mr = kmalloc(sizeof *mr, GFP_KERNEL); 132 if (!mr) 133 return ERR_PTR(-ENOMEM); 134 135 mr->umem = ib_umem_get(pd->uobject->context, start, length, 136 access_flags, 0); 137 if (IS_ERR(mr->umem)) { 138 err = PTR_ERR(mr->umem); 139 goto err_free; 140 } 141 142 n = ib_umem_page_count(mr->umem); 143 shift = ilog2(mr->umem->page_size); 144 145 err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length, 146 convert_access(access_flags), n, shift, &mr->mmr); 147 if (err) 148 goto err_umem; 149 150 err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem); 151 if (err) 152 goto err_mr; 153 154 err = mlx4_mr_enable(dev->dev, &mr->mmr); 155 if (err) 156 goto err_mr; 157 158 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; 159 160 return &mr->ibmr; 161 162 err_mr: 163 mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr); 164 165 err_umem: 166 ib_umem_release(mr->umem); 167 168 err_free: 169 kfree(mr); 170 171 return ERR_PTR(err); 172 } 173 174 int mlx4_ib_dereg_mr(struct ib_mr *ibmr) 175 { 176 struct mlx4_ib_mr *mr = to_mmr(ibmr); 177 178 mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr); 179 if (mr->umem) 180 ib_umem_release(mr->umem); 181 kfree(mr); 182 183 return 0; 184 } 185 186 struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc, 187 struct ib_fmr_attr *fmr_attr) 188 { 189 struct mlx4_ib_dev *dev = to_mdev(pd->device); 190 struct mlx4_ib_fmr *fmr; 191 int err = -ENOMEM; 192 193 fmr = kmalloc(sizeof *fmr, GFP_KERNEL); 194 if (!fmr) 195 return ERR_PTR(-ENOMEM); 196 197 err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc), 198 fmr_attr->max_pages, fmr_attr->max_maps, 199 fmr_attr->page_shift, &fmr->mfmr); 200 if (err) 201 goto err_free; 202 203 err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr); 204 if (err) 205 goto err_mr; 206 207 fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key; 208 209 return &fmr->ibfmr; 210 211 err_mr: 212 mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr); 213 214 err_free: 215 kfree(fmr); 216 217 return ERR_PTR(err); 218 } 219 220 int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, 221 int npages, u64 iova) 222 { 223 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); 224 struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device); 225 226 return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova, 227 &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey); 228 } 229 230 int mlx4_ib_unmap_fmr(struct list_head *fmr_list) 231 { 232 struct ib_fmr *ibfmr; 233 int err; 234 struct mlx4_dev *mdev = NULL; 235 236 list_for_each_entry(ibfmr, fmr_list, list) { 237 if (mdev && to_mdev(ibfmr->device)->dev != mdev) 238 return -EINVAL; 239 mdev = to_mdev(ibfmr->device)->dev; 240 } 241 242 if (!mdev) 243 return 0; 244 245 list_for_each_entry(ibfmr, fmr_list, list) { 246 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); 247 248 mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey); 249 } 250 251 /* 252 * Make sure all MPT status updates are visible before issuing 253 * SYNC_TPT firmware command. 254 */ 255 wmb(); 256 257 err = mlx4_SYNC_TPT(mdev); 258 if (err) 259 printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when " 260 "unmapping FMRs\n", err); 261 262 return 0; 263 } 264 265 int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr) 266 { 267 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); 268 struct mlx4_ib_dev *dev = to_mdev(ibfmr->device); 269 int err; 270 271 err = mlx4_fmr_free(dev->dev, &ifmr->mfmr); 272 273 if (!err) 274 kfree(ifmr); 275 276 return err; 277 } 278