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/init.h> 35 #include <linux/errno.h> 36 #include <linux/export.h> 37 #include <linux/io-mapping.h> 38 39 #include <asm/page.h> 40 41 #include "mlx4.h" 42 #include "icm.h" 43 44 enum { 45 MLX4_NUM_RESERVED_UARS = 8 46 }; 47 48 int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn) 49 { 50 struct mlx4_priv *priv = mlx4_priv(dev); 51 52 *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap); 53 if (*pdn == -1) 54 return -ENOMEM; 55 56 return 0; 57 } 58 EXPORT_SYMBOL_GPL(mlx4_pd_alloc); 59 60 void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn) 61 { 62 mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn); 63 } 64 EXPORT_SYMBOL_GPL(mlx4_pd_free); 65 66 int __mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn) 67 { 68 struct mlx4_priv *priv = mlx4_priv(dev); 69 70 *xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap); 71 if (*xrcdn == -1) 72 return -ENOMEM; 73 74 return 0; 75 } 76 77 int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn) 78 { 79 u64 out_param; 80 int err; 81 82 if (mlx4_is_mfunc(dev)) { 83 err = mlx4_cmd_imm(dev, 0, &out_param, 84 RES_XRCD, RES_OP_RESERVE, 85 MLX4_CMD_ALLOC_RES, 86 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 87 if (err) 88 return err; 89 90 *xrcdn = get_param_l(&out_param); 91 return 0; 92 } 93 return __mlx4_xrcd_alloc(dev, xrcdn); 94 } 95 EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc); 96 97 void __mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn) 98 { 99 mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn); 100 } 101 102 void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn) 103 { 104 u64 in_param = 0; 105 int err; 106 107 if (mlx4_is_mfunc(dev)) { 108 set_param_l(&in_param, xrcdn); 109 err = mlx4_cmd(dev, in_param, RES_XRCD, 110 RES_OP_RESERVE, MLX4_CMD_FREE_RES, 111 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 112 if (err) 113 mlx4_warn(dev, "Failed to release xrcdn %d\n", xrcdn); 114 } else 115 __mlx4_xrcd_free(dev, xrcdn); 116 } 117 EXPORT_SYMBOL_GPL(mlx4_xrcd_free); 118 119 int mlx4_init_pd_table(struct mlx4_dev *dev) 120 { 121 struct mlx4_priv *priv = mlx4_priv(dev); 122 123 return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds, 124 (1 << NOT_MASKED_PD_BITS) - 1, 125 dev->caps.reserved_pds, 0); 126 } 127 128 void mlx4_cleanup_pd_table(struct mlx4_dev *dev) 129 { 130 mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap); 131 } 132 133 int mlx4_init_xrcd_table(struct mlx4_dev *dev) 134 { 135 struct mlx4_priv *priv = mlx4_priv(dev); 136 137 return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16), 138 (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0); 139 } 140 141 void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev) 142 { 143 mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap); 144 } 145 146 int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar) 147 { 148 int offset; 149 150 uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap); 151 if (uar->index == -1) 152 return -ENOMEM; 153 154 if (mlx4_is_slave(dev)) 155 offset = uar->index % ((int) pci_resource_len(dev->pdev, 2) / 156 dev->caps.uar_page_size); 157 else 158 offset = uar->index; 159 uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + offset; 160 uar->map = NULL; 161 return 0; 162 } 163 EXPORT_SYMBOL_GPL(mlx4_uar_alloc); 164 165 void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar) 166 { 167 mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index); 168 } 169 EXPORT_SYMBOL_GPL(mlx4_uar_free); 170 171 int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf) 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(sizeof *uar, GFP_KERNEL); 190 if (!uar) { 191 err = -ENOMEM; 192 goto out; 193 } 194 err = mlx4_uar_alloc(dev, uar); 195 if (err) 196 goto free_kmalloc; 197 198 uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE); 199 if (!uar->map) { 200 err = -ENOMEM; 201 goto free_uar; 202 } 203 204 uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT); 205 if (!uar->bf_map) { 206 err = -ENOMEM; 207 goto unamp_uar; 208 } 209 uar->free_bf_bmap = 0; 210 list_add(&uar->bf_list, &priv->bf_list); 211 } 212 213 bf->uar = uar; 214 idx = ffz(uar->free_bf_bmap); 215 uar->free_bf_bmap |= 1 << idx; 216 bf->uar = uar; 217 bf->offset = 0; 218 bf->buf_size = dev->caps.bf_reg_size / 2; 219 bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size; 220 if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1) 221 list_del_init(&uar->bf_list); 222 223 goto out; 224 225 unamp_uar: 226 bf->uar = NULL; 227 iounmap(uar->map); 228 229 free_uar: 230 mlx4_uar_free(dev, uar); 231 232 free_kmalloc: 233 kfree(uar); 234 235 out: 236 mutex_unlock(&priv->bf_mutex); 237 return err; 238 } 239 EXPORT_SYMBOL_GPL(mlx4_bf_alloc); 240 241 void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf) 242 { 243 struct mlx4_priv *priv = mlx4_priv(dev); 244 int idx; 245 246 if (!bf->uar || !bf->uar->bf_map) 247 return; 248 249 mutex_lock(&priv->bf_mutex); 250 idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size; 251 bf->uar->free_bf_bmap &= ~(1 << idx); 252 if (!bf->uar->free_bf_bmap) { 253 if (!list_empty(&bf->uar->bf_list)) 254 list_del(&bf->uar->bf_list); 255 256 io_mapping_unmap(bf->uar->bf_map); 257 iounmap(bf->uar->map); 258 mlx4_uar_free(dev, bf->uar); 259 kfree(bf->uar); 260 } else if (list_empty(&bf->uar->bf_list)) 261 list_add(&bf->uar->bf_list, &priv->bf_list); 262 263 mutex_unlock(&priv->bf_mutex); 264 } 265 EXPORT_SYMBOL_GPL(mlx4_bf_free); 266 267 int mlx4_init_uar_table(struct mlx4_dev *dev) 268 { 269 if (dev->caps.num_uars <= 128) { 270 mlx4_err(dev, "Only %d UAR pages (need more than 128)\n", 271 dev->caps.num_uars); 272 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n"); 273 return -ENODEV; 274 } 275 276 return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap, 277 dev->caps.num_uars, dev->caps.num_uars - 1, 278 dev->caps.reserved_uars, 0); 279 } 280 281 void mlx4_cleanup_uar_table(struct mlx4_dev *dev) 282 { 283 mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap); 284 } 285