1 /* 2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2005, 2014 Mellanox Technologies. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <linux/errno.h> 35 #include <linux/module.h> 36 #include <linux/io-mapping.h> 37 38 #include <linux/page.h> 39 40 #include "mlx4.h" 41 #include "icm.h" 42 43 enum { 44 MLX4_NUM_RESERVED_UARS = 8 45 }; 46 47 int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn) 48 { 49 struct mlx4_priv *priv = mlx4_priv(dev); 50 51 *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap); 52 if (*pdn == -1) 53 return -ENOMEM; 54 55 return 0; 56 } 57 EXPORT_SYMBOL_GPL(mlx4_pd_alloc); 58 59 void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn) 60 { 61 mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn, MLX4_USE_RR); 62 } 63 EXPORT_SYMBOL_GPL(mlx4_pd_free); 64 65 int __mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn) 66 { 67 struct mlx4_priv *priv = mlx4_priv(dev); 68 69 *xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap); 70 if (*xrcdn == -1) 71 return -ENOMEM; 72 73 return 0; 74 } 75 76 int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn) 77 { 78 u64 out_param; 79 int err; 80 81 if (mlx4_is_mfunc(dev)) { 82 err = mlx4_cmd_imm(dev, 0, &out_param, 83 RES_XRCD, RES_OP_RESERVE, 84 MLX4_CMD_ALLOC_RES, 85 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 86 if (err) 87 return err; 88 89 *xrcdn = get_param_l(&out_param); 90 return 0; 91 } 92 return __mlx4_xrcd_alloc(dev, xrcdn); 93 } 94 EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc); 95 96 void __mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn) 97 { 98 mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn, MLX4_USE_RR); 99 } 100 101 void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn) 102 { 103 u64 in_param = 0; 104 int err; 105 106 if (mlx4_is_mfunc(dev)) { 107 set_param_l(&in_param, xrcdn); 108 err = mlx4_cmd(dev, in_param, RES_XRCD, 109 RES_OP_RESERVE, MLX4_CMD_FREE_RES, 110 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 111 if (err) 112 mlx4_warn(dev, "Failed to release xrcdn %d\n", xrcdn); 113 } else 114 __mlx4_xrcd_free(dev, xrcdn); 115 } 116 EXPORT_SYMBOL_GPL(mlx4_xrcd_free); 117 118 int mlx4_init_pd_table(struct mlx4_dev *dev) 119 { 120 struct mlx4_priv *priv = mlx4_priv(dev); 121 122 return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds, 123 (1 << NOT_MASKED_PD_BITS) - 1, 124 dev->caps.reserved_pds, 0); 125 } 126 127 void mlx4_cleanup_pd_table(struct mlx4_dev *dev) 128 { 129 mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap); 130 } 131 132 int mlx4_init_xrcd_table(struct mlx4_dev *dev) 133 { 134 struct mlx4_priv *priv = mlx4_priv(dev); 135 136 return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16), 137 (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0); 138 } 139 140 void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev) 141 { 142 mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap); 143 } 144 145 int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar) 146 { 147 int offset; 148 149 uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap); 150 if (uar->index == -1) 151 return -ENOMEM; 152 153 if (mlx4_is_slave(dev)) 154 offset = uar->index % ((int) pci_resource_len(dev->pdev, 2) / 155 dev->caps.uar_page_size); 156 else 157 offset = uar->index; 158 uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + offset; 159 uar->map = NULL; 160 return 0; 161 } 162 EXPORT_SYMBOL_GPL(mlx4_uar_alloc); 163 164 void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar) 165 { 166 mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index, MLX4_USE_RR); 167 } 168 EXPORT_SYMBOL_GPL(mlx4_uar_free); 169 170 #ifndef CONFIG_PPC 171 int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf, int node) 172 { 173 struct mlx4_priv *priv = mlx4_priv(dev); 174 struct mlx4_uar *uar; 175 int err = 0; 176 int idx; 177 178 if (!priv->bf_mapping) 179 return -ENOMEM; 180 181 mutex_lock(&priv->bf_mutex); 182 if (!list_empty(&priv->bf_list)) 183 uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list); 184 else { 185 if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) { 186 err = -ENOMEM; 187 goto out; 188 } 189 uar = kmalloc_node(sizeof *uar, GFP_KERNEL, node); 190 if (!uar) { 191 uar = kmalloc(sizeof *uar, GFP_KERNEL); 192 if (!uar) { 193 err = -ENOMEM; 194 goto out; 195 } 196 } 197 err = mlx4_uar_alloc(dev, uar); 198 if (err) 199 goto free_kmalloc; 200 201 uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE); 202 if (!uar->map) { 203 err = -ENOMEM; 204 goto free_uar; 205 } 206 207 uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT); 208 if (!uar->bf_map) { 209 err = -ENOMEM; 210 goto unamp_uar; 211 } 212 uar->free_bf_bmap = 0; 213 list_add(&uar->bf_list, &priv->bf_list); 214 } 215 216 bf->uar = uar; 217 idx = ffz(uar->free_bf_bmap); 218 uar->free_bf_bmap |= 1 << idx; 219 bf->uar = uar; 220 bf->offset = 0; 221 bf->buf_size = dev->caps.bf_reg_size / 2; 222 bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size; 223 if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1) 224 list_del_init(&uar->bf_list); 225 226 goto out; 227 228 unamp_uar: 229 bf->uar = NULL; 230 iounmap(uar->map); 231 232 free_uar: 233 mlx4_uar_free(dev, uar); 234 235 free_kmalloc: 236 kfree(uar); 237 238 out: 239 mutex_unlock(&priv->bf_mutex); 240 return err; 241 } 242 EXPORT_SYMBOL_GPL(mlx4_bf_alloc); 243 244 void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf) 245 { 246 struct mlx4_priv *priv = mlx4_priv(dev); 247 int idx; 248 249 if (!bf->uar || !bf->uar->bf_map) 250 return; 251 252 mutex_lock(&priv->bf_mutex); 253 idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size; 254 bf->uar->free_bf_bmap &= ~(1 << idx); 255 if (!bf->uar->free_bf_bmap) { 256 if (!list_empty(&bf->uar->bf_list)) 257 list_del(&bf->uar->bf_list); 258 259 io_mapping_unmap(bf->uar->bf_map); 260 iounmap(bf->uar->map); 261 mlx4_uar_free(dev, bf->uar); 262 kfree(bf->uar); 263 } else if (list_empty(&bf->uar->bf_list)) 264 list_add(&bf->uar->bf_list, &priv->bf_list); 265 266 mutex_unlock(&priv->bf_mutex); 267 } 268 EXPORT_SYMBOL_GPL(mlx4_bf_free); 269 270 #else 271 int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf, int node) 272 { 273 memset(bf, 0, sizeof *bf); 274 return -ENOSYS; 275 } 276 EXPORT_SYMBOL_GPL(mlx4_bf_alloc); 277 278 void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf) 279 { 280 return; 281 } 282 EXPORT_SYMBOL_GPL(mlx4_bf_free); 283 #endif 284 285 int mlx4_init_uar_table(struct mlx4_dev *dev) 286 { 287 if (dev->caps.num_uars <= 128) { 288 mlx4_err(dev, "Only %d UAR pages (need more than 128)\n", 289 dev->caps.num_uars); 290 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n"); 291 return -ENODEV; 292 } 293 294 return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap, 295 dev->caps.num_uars, dev->caps.num_uars - 1, 296 dev->caps.reserved_uars, 0); 297 } 298 299 void mlx4_cleanup_uar_table(struct mlx4_dev *dev) 300 { 301 mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap); 302 } 303