1 /* 2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2005 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/export.h> 36 #include <linux/io-mapping.h> 37 38 #include <asm/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->persist->pdev, 155 2) / 156 dev->caps.uar_page_size); 157 else 158 offset = uar->index; 159 uar->pfn = (pci_resource_start(dev->persist->pdev, 2) >> PAGE_SHIFT) 160 + offset; 161 uar->map = NULL; 162 return 0; 163 } 164 EXPORT_SYMBOL_GPL(mlx4_uar_alloc); 165 166 void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar) 167 { 168 mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index, MLX4_USE_RR); 169 } 170 EXPORT_SYMBOL_GPL(mlx4_uar_free); 171 172 int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf, int node) 173 { 174 struct mlx4_priv *priv = mlx4_priv(dev); 175 struct mlx4_uar *uar; 176 int err = 0; 177 int idx; 178 179 if (!priv->bf_mapping) 180 return -ENOMEM; 181 182 mutex_lock(&priv->bf_mutex); 183 if (!list_empty(&priv->bf_list)) 184 uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list); 185 else { 186 if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) { 187 err = -ENOMEM; 188 goto out; 189 } 190 uar = kmalloc_node(sizeof(*uar), GFP_KERNEL, node); 191 if (!uar) { 192 uar = kmalloc(sizeof(*uar), GFP_KERNEL); 193 if (!uar) { 194 err = -ENOMEM; 195 goto out; 196 } 197 } 198 err = mlx4_uar_alloc(dev, uar); 199 if (err) 200 goto free_kmalloc; 201 202 uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE); 203 if (!uar->map) { 204 err = -ENOMEM; 205 goto free_uar; 206 } 207 208 uar->bf_map = io_mapping_map_wc(priv->bf_mapping, 209 uar->index << PAGE_SHIFT, 210 PAGE_SIZE); 211 if (!uar->bf_map) { 212 err = -ENOMEM; 213 goto unamp_uar; 214 } 215 uar->free_bf_bmap = 0; 216 list_add(&uar->bf_list, &priv->bf_list); 217 } 218 219 idx = ffz(uar->free_bf_bmap); 220 uar->free_bf_bmap |= 1 << idx; 221 bf->uar = uar; 222 bf->offset = 0; 223 bf->buf_size = dev->caps.bf_reg_size / 2; 224 bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size; 225 if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1) 226 list_del_init(&uar->bf_list); 227 228 goto out; 229 230 unamp_uar: 231 bf->uar = NULL; 232 iounmap(uar->map); 233 234 free_uar: 235 mlx4_uar_free(dev, uar); 236 237 free_kmalloc: 238 kfree(uar); 239 240 out: 241 mutex_unlock(&priv->bf_mutex); 242 return err; 243 } 244 EXPORT_SYMBOL_GPL(mlx4_bf_alloc); 245 246 void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf) 247 { 248 struct mlx4_priv *priv = mlx4_priv(dev); 249 int idx; 250 251 if (!bf->uar || !bf->uar->bf_map) 252 return; 253 254 mutex_lock(&priv->bf_mutex); 255 idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size; 256 bf->uar->free_bf_bmap &= ~(1 << idx); 257 if (!bf->uar->free_bf_bmap) { 258 if (!list_empty(&bf->uar->bf_list)) 259 list_del(&bf->uar->bf_list); 260 261 io_mapping_unmap(bf->uar->bf_map); 262 iounmap(bf->uar->map); 263 mlx4_uar_free(dev, bf->uar); 264 kfree(bf->uar); 265 } else if (list_empty(&bf->uar->bf_list)) 266 list_add(&bf->uar->bf_list, &priv->bf_list); 267 268 mutex_unlock(&priv->bf_mutex); 269 } 270 EXPORT_SYMBOL_GPL(mlx4_bf_free); 271 272 int mlx4_init_uar_table(struct mlx4_dev *dev) 273 { 274 int num_reserved_uar = mlx4_get_num_reserved_uar(dev); 275 276 mlx4_dbg(dev, "uar_page_shift = %d", dev->uar_page_shift); 277 mlx4_dbg(dev, "Effective reserved_uars=%d", dev->caps.reserved_uars); 278 279 if (dev->caps.num_uars <= num_reserved_uar) { 280 mlx4_err( 281 dev, "Only %d UAR pages (need more than %d)\n", 282 dev->caps.num_uars, num_reserved_uar); 283 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n"); 284 return -ENODEV; 285 } 286 287 return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap, 288 dev->caps.num_uars, dev->caps.num_uars - 1, 289 dev->caps.reserved_uars, 0); 290 } 291 292 void mlx4_cleanup_uar_table(struct mlx4_dev *dev) 293 { 294 mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap); 295 } 296