Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. |
Jack Morgenstein | 51a379d | 2008-07-25 10:32:52 -0700 | [diff] [blame] | 3 | * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved. |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 4 | * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. |
| 5 | * |
| 6 | * This software is available to you under a choice of one of two |
| 7 | * licenses. You may choose to be licensed under the terms of the GNU |
| 8 | * General Public License (GPL) Version 2, available from the file |
| 9 | * COPYING in the main directory of this source tree, or the |
| 10 | * OpenIB.org BSD license below: |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or |
| 13 | * without modification, are permitted provided that the following |
| 14 | * conditions are met: |
| 15 | * |
| 16 | * - Redistributions of source code must retain the above |
| 17 | * copyright notice, this list of conditions and the following |
| 18 | * disclaimer. |
| 19 | * |
| 20 | * - Redistributions in binary form must reproduce the above |
| 21 | * copyright notice, this list of conditions and the following |
| 22 | * disclaimer in the documentation and/or other materials |
| 23 | * provided with the distribution. |
| 24 | * |
| 25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 32 | * SOFTWARE. |
| 33 | */ |
| 34 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 35 | #include <linux/errno.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/slab.h> |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 37 | |
| 38 | #include <linux/mlx4/cmd.h> |
| 39 | |
| 40 | #include "mlx4.h" |
| 41 | #include "icm.h" |
| 42 | |
| 43 | /* |
| 44 | * Must be packed because mtt_seg is 64 bits but only aligned to 32 bits. |
| 45 | */ |
| 46 | struct mlx4_mpt_entry { |
| 47 | __be32 flags; |
| 48 | __be32 qpn; |
| 49 | __be32 key; |
Roland Dreier | 95d04f0 | 2008-07-23 08:12:26 -0700 | [diff] [blame] | 50 | __be32 pd_flags; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 51 | __be64 start; |
| 52 | __be64 length; |
| 53 | __be32 lkey; |
| 54 | __be32 win_cnt; |
| 55 | u8 reserved1[3]; |
| 56 | u8 mtt_rep; |
| 57 | __be64 mtt_seg; |
| 58 | __be32 mtt_sz; |
| 59 | __be32 entity_size; |
| 60 | __be32 first_byte_offset; |
Eric Dumazet | ba2d358 | 2010-06-02 18:10:09 +0000 | [diff] [blame^] | 61 | } __packed; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 62 | |
| 63 | #define MLX4_MPT_FLAG_SW_OWNS (0xfUL << 28) |
Roland Dreier | 95d04f0 | 2008-07-23 08:12:26 -0700 | [diff] [blame] | 64 | #define MLX4_MPT_FLAG_FREE (0x3UL << 28) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 65 | #define MLX4_MPT_FLAG_MIO (1 << 17) |
| 66 | #define MLX4_MPT_FLAG_BIND_ENABLE (1 << 15) |
| 67 | #define MLX4_MPT_FLAG_PHYSICAL (1 << 9) |
| 68 | #define MLX4_MPT_FLAG_REGION (1 << 8) |
| 69 | |
Vladimir Sokolovsky | c925743 | 2008-09-02 13:38:29 -0700 | [diff] [blame] | 70 | #define MLX4_MPT_PD_FLAG_FAST_REG (1 << 27) |
| 71 | #define MLX4_MPT_PD_FLAG_RAE (1 << 28) |
Roland Dreier | 95d04f0 | 2008-07-23 08:12:26 -0700 | [diff] [blame] | 72 | #define MLX4_MPT_PD_FLAG_EN_INV (3 << 24) |
| 73 | |
Jack Morgenstein | 8ad11fb | 2007-08-01 12:29:05 +0300 | [diff] [blame] | 74 | #define MLX4_MPT_STATUS_SW 0xF0 |
| 75 | #define MLX4_MPT_STATUS_HW 0x00 |
| 76 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 77 | static u32 mlx4_buddy_alloc(struct mlx4_buddy *buddy, int order) |
| 78 | { |
| 79 | int o; |
| 80 | int m; |
| 81 | u32 seg; |
| 82 | |
| 83 | spin_lock(&buddy->lock); |
| 84 | |
Roland Dreier | e4044cf | 2008-07-22 14:19:40 -0700 | [diff] [blame] | 85 | for (o = order; o <= buddy->max_order; ++o) |
| 86 | if (buddy->num_free[o]) { |
| 87 | m = 1 << (buddy->max_order - o); |
| 88 | seg = find_first_bit(buddy->bits[o], m); |
| 89 | if (seg < m) |
| 90 | goto found; |
| 91 | } |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 92 | |
| 93 | spin_unlock(&buddy->lock); |
| 94 | return -1; |
| 95 | |
| 96 | found: |
| 97 | clear_bit(seg, buddy->bits[o]); |
Roland Dreier | e4044cf | 2008-07-22 14:19:40 -0700 | [diff] [blame] | 98 | --buddy->num_free[o]; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 99 | |
| 100 | while (o > order) { |
| 101 | --o; |
| 102 | seg <<= 1; |
| 103 | set_bit(seg ^ 1, buddy->bits[o]); |
Roland Dreier | e4044cf | 2008-07-22 14:19:40 -0700 | [diff] [blame] | 104 | ++buddy->num_free[o]; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | spin_unlock(&buddy->lock); |
| 108 | |
| 109 | seg <<= order; |
| 110 | |
| 111 | return seg; |
| 112 | } |
| 113 | |
| 114 | static void mlx4_buddy_free(struct mlx4_buddy *buddy, u32 seg, int order) |
| 115 | { |
| 116 | seg >>= order; |
| 117 | |
| 118 | spin_lock(&buddy->lock); |
| 119 | |
| 120 | while (test_bit(seg ^ 1, buddy->bits[order])) { |
| 121 | clear_bit(seg ^ 1, buddy->bits[order]); |
Roland Dreier | e4044cf | 2008-07-22 14:19:40 -0700 | [diff] [blame] | 122 | --buddy->num_free[order]; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 123 | seg >>= 1; |
| 124 | ++order; |
| 125 | } |
| 126 | |
| 127 | set_bit(seg, buddy->bits[order]); |
Roland Dreier | e4044cf | 2008-07-22 14:19:40 -0700 | [diff] [blame] | 128 | ++buddy->num_free[order]; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 129 | |
| 130 | spin_unlock(&buddy->lock); |
| 131 | } |
| 132 | |
Roland Dreier | e8f9b2e | 2008-02-04 20:20:41 -0800 | [diff] [blame] | 133 | static int mlx4_buddy_init(struct mlx4_buddy *buddy, int max_order) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 134 | { |
| 135 | int i, s; |
| 136 | |
| 137 | buddy->max_order = max_order; |
| 138 | spin_lock_init(&buddy->lock); |
| 139 | |
| 140 | buddy->bits = kzalloc((buddy->max_order + 1) * sizeof (long *), |
| 141 | GFP_KERNEL); |
Roland Dreier | e4044cf | 2008-07-22 14:19:40 -0700 | [diff] [blame] | 142 | buddy->num_free = kzalloc((buddy->max_order + 1) * sizeof (int *), |
| 143 | GFP_KERNEL); |
| 144 | if (!buddy->bits || !buddy->num_free) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 145 | goto err_out; |
| 146 | |
| 147 | for (i = 0; i <= buddy->max_order; ++i) { |
| 148 | s = BITS_TO_LONGS(1 << (buddy->max_order - i)); |
| 149 | buddy->bits[i] = kmalloc(s * sizeof (long), GFP_KERNEL); |
| 150 | if (!buddy->bits[i]) |
| 151 | goto err_out_free; |
| 152 | bitmap_zero(buddy->bits[i], 1 << (buddy->max_order - i)); |
| 153 | } |
| 154 | |
| 155 | set_bit(0, buddy->bits[buddy->max_order]); |
Roland Dreier | e4044cf | 2008-07-22 14:19:40 -0700 | [diff] [blame] | 156 | buddy->num_free[buddy->max_order] = 1; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 157 | |
| 158 | return 0; |
| 159 | |
| 160 | err_out_free: |
| 161 | for (i = 0; i <= buddy->max_order; ++i) |
| 162 | kfree(buddy->bits[i]); |
| 163 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 164 | err_out: |
Roland Dreier | e4044cf | 2008-07-22 14:19:40 -0700 | [diff] [blame] | 165 | kfree(buddy->bits); |
| 166 | kfree(buddy->num_free); |
| 167 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 168 | return -ENOMEM; |
| 169 | } |
| 170 | |
| 171 | static void mlx4_buddy_cleanup(struct mlx4_buddy *buddy) |
| 172 | { |
| 173 | int i; |
| 174 | |
| 175 | for (i = 0; i <= buddy->max_order; ++i) |
| 176 | kfree(buddy->bits[i]); |
| 177 | |
| 178 | kfree(buddy->bits); |
Roland Dreier | e4044cf | 2008-07-22 14:19:40 -0700 | [diff] [blame] | 179 | kfree(buddy->num_free); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | static u32 mlx4_alloc_mtt_range(struct mlx4_dev *dev, int order) |
| 183 | { |
| 184 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; |
| 185 | u32 seg; |
| 186 | |
| 187 | seg = mlx4_buddy_alloc(&mr_table->mtt_buddy, order); |
| 188 | if (seg == -1) |
| 189 | return -1; |
| 190 | |
| 191 | if (mlx4_table_get_range(dev, &mr_table->mtt_table, seg, |
| 192 | seg + (1 << order) - 1)) { |
| 193 | mlx4_buddy_free(&mr_table->mtt_buddy, seg, order); |
| 194 | return -1; |
| 195 | } |
| 196 | |
| 197 | return seg; |
| 198 | } |
| 199 | |
| 200 | int mlx4_mtt_init(struct mlx4_dev *dev, int npages, int page_shift, |
| 201 | struct mlx4_mtt *mtt) |
| 202 | { |
| 203 | int i; |
| 204 | |
| 205 | if (!npages) { |
| 206 | mtt->order = -1; |
| 207 | mtt->page_shift = MLX4_ICM_PAGE_SHIFT; |
| 208 | return 0; |
| 209 | } else |
| 210 | mtt->page_shift = page_shift; |
| 211 | |
Eli Cohen | ab6bf42 | 2009-05-27 14:38:34 -0700 | [diff] [blame] | 212 | for (mtt->order = 0, i = dev->caps.mtts_per_seg; i < npages; i <<= 1) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 213 | ++mtt->order; |
| 214 | |
| 215 | mtt->first_seg = mlx4_alloc_mtt_range(dev, mtt->order); |
| 216 | if (mtt->first_seg == -1) |
| 217 | return -ENOMEM; |
| 218 | |
| 219 | return 0; |
| 220 | } |
| 221 | EXPORT_SYMBOL_GPL(mlx4_mtt_init); |
| 222 | |
| 223 | void mlx4_mtt_cleanup(struct mlx4_dev *dev, struct mlx4_mtt *mtt) |
| 224 | { |
| 225 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; |
| 226 | |
| 227 | if (mtt->order < 0) |
| 228 | return; |
| 229 | |
| 230 | mlx4_buddy_free(&mr_table->mtt_buddy, mtt->first_seg, mtt->order); |
| 231 | mlx4_table_put_range(dev, &mr_table->mtt_table, mtt->first_seg, |
| 232 | mtt->first_seg + (1 << mtt->order) - 1); |
| 233 | } |
| 234 | EXPORT_SYMBOL_GPL(mlx4_mtt_cleanup); |
| 235 | |
| 236 | u64 mlx4_mtt_addr(struct mlx4_dev *dev, struct mlx4_mtt *mtt) |
| 237 | { |
| 238 | return (u64) mtt->first_seg * dev->caps.mtt_entry_sz; |
| 239 | } |
| 240 | EXPORT_SYMBOL_GPL(mlx4_mtt_addr); |
| 241 | |
| 242 | static u32 hw_index_to_key(u32 ind) |
| 243 | { |
| 244 | return (ind >> 24) | (ind << 8); |
| 245 | } |
| 246 | |
| 247 | static u32 key_to_hw_index(u32 key) |
| 248 | { |
| 249 | return (key << 24) | (key >> 8); |
| 250 | } |
| 251 | |
| 252 | static int mlx4_SW2HW_MPT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, |
| 253 | int mpt_index) |
| 254 | { |
| 255 | return mlx4_cmd(dev, mailbox->dma, mpt_index, 0, MLX4_CMD_SW2HW_MPT, |
| 256 | MLX4_CMD_TIME_CLASS_B); |
| 257 | } |
| 258 | |
| 259 | static int mlx4_HW2SW_MPT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, |
| 260 | int mpt_index) |
| 261 | { |
| 262 | return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, mpt_index, |
| 263 | !mailbox, MLX4_CMD_HW2SW_MPT, MLX4_CMD_TIME_CLASS_B); |
| 264 | } |
| 265 | |
| 266 | int mlx4_mr_alloc(struct mlx4_dev *dev, u32 pd, u64 iova, u64 size, u32 access, |
| 267 | int npages, int page_shift, struct mlx4_mr *mr) |
| 268 | { |
| 269 | struct mlx4_priv *priv = mlx4_priv(dev); |
| 270 | u32 index; |
| 271 | int err; |
| 272 | |
| 273 | index = mlx4_bitmap_alloc(&priv->mr_table.mpt_bitmap); |
Jack Morgenstein | 0172e2e | 2007-07-26 11:16:58 +0300 | [diff] [blame] | 274 | if (index == -1) |
| 275 | return -ENOMEM; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 276 | |
| 277 | mr->iova = iova; |
| 278 | mr->size = size; |
| 279 | mr->pd = pd; |
| 280 | mr->access = access; |
| 281 | mr->enabled = 0; |
| 282 | mr->key = hw_index_to_key(index); |
| 283 | |
| 284 | err = mlx4_mtt_init(dev, npages, page_shift, &mr->mtt); |
| 285 | if (err) |
Jack Morgenstein | 0172e2e | 2007-07-26 11:16:58 +0300 | [diff] [blame] | 286 | mlx4_bitmap_free(&priv->mr_table.mpt_bitmap, index); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 287 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 288 | return err; |
| 289 | } |
| 290 | EXPORT_SYMBOL_GPL(mlx4_mr_alloc); |
| 291 | |
| 292 | void mlx4_mr_free(struct mlx4_dev *dev, struct mlx4_mr *mr) |
| 293 | { |
| 294 | struct mlx4_priv *priv = mlx4_priv(dev); |
| 295 | int err; |
| 296 | |
| 297 | if (mr->enabled) { |
| 298 | err = mlx4_HW2SW_MPT(dev, NULL, |
| 299 | key_to_hw_index(mr->key) & |
| 300 | (dev->caps.num_mpts - 1)); |
| 301 | if (err) |
| 302 | mlx4_warn(dev, "HW2SW_MPT failed (%d)\n", err); |
| 303 | } |
| 304 | |
| 305 | mlx4_mtt_cleanup(dev, &mr->mtt); |
| 306 | mlx4_bitmap_free(&priv->mr_table.mpt_bitmap, key_to_hw_index(mr->key)); |
| 307 | } |
| 308 | EXPORT_SYMBOL_GPL(mlx4_mr_free); |
| 309 | |
| 310 | int mlx4_mr_enable(struct mlx4_dev *dev, struct mlx4_mr *mr) |
| 311 | { |
| 312 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; |
| 313 | struct mlx4_cmd_mailbox *mailbox; |
| 314 | struct mlx4_mpt_entry *mpt_entry; |
| 315 | int err; |
| 316 | |
| 317 | err = mlx4_table_get(dev, &mr_table->dmpt_table, key_to_hw_index(mr->key)); |
| 318 | if (err) |
| 319 | return err; |
| 320 | |
| 321 | mailbox = mlx4_alloc_cmd_mailbox(dev); |
| 322 | if (IS_ERR(mailbox)) { |
| 323 | err = PTR_ERR(mailbox); |
| 324 | goto err_table; |
| 325 | } |
| 326 | mpt_entry = mailbox->buf; |
| 327 | |
| 328 | memset(mpt_entry, 0, sizeof *mpt_entry); |
| 329 | |
Roland Dreier | 95d04f0 | 2008-07-23 08:12:26 -0700 | [diff] [blame] | 330 | mpt_entry->flags = cpu_to_be32(MLX4_MPT_FLAG_MIO | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 331 | MLX4_MPT_FLAG_REGION | |
| 332 | mr->access); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 333 | |
| 334 | mpt_entry->key = cpu_to_be32(key_to_hw_index(mr->key)); |
Roland Dreier | 95d04f0 | 2008-07-23 08:12:26 -0700 | [diff] [blame] | 335 | mpt_entry->pd_flags = cpu_to_be32(mr->pd | MLX4_MPT_PD_FLAG_EN_INV); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 336 | mpt_entry->start = cpu_to_be64(mr->iova); |
| 337 | mpt_entry->length = cpu_to_be64(mr->size); |
| 338 | mpt_entry->entity_size = cpu_to_be32(mr->mtt.page_shift); |
Roland Dreier | 95d04f0 | 2008-07-23 08:12:26 -0700 | [diff] [blame] | 339 | |
Jack Morgenstein | b2d9308 | 2007-06-07 23:24:38 -0700 | [diff] [blame] | 340 | if (mr->mtt.order < 0) { |
| 341 | mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_PHYSICAL); |
| 342 | mpt_entry->mtt_seg = 0; |
Roland Dreier | 95d04f0 | 2008-07-23 08:12:26 -0700 | [diff] [blame] | 343 | } else { |
Jack Morgenstein | b2d9308 | 2007-06-07 23:24:38 -0700 | [diff] [blame] | 344 | mpt_entry->mtt_seg = cpu_to_be64(mlx4_mtt_addr(dev, &mr->mtt)); |
Roland Dreier | 95d04f0 | 2008-07-23 08:12:26 -0700 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | if (mr->mtt.order >= 0 && mr->mtt.page_shift == 0) { |
| 348 | /* fast register MR in free state */ |
| 349 | mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_FREE); |
Vladimir Sokolovsky | c925743 | 2008-09-02 13:38:29 -0700 | [diff] [blame] | 350 | mpt_entry->pd_flags |= cpu_to_be32(MLX4_MPT_PD_FLAG_FAST_REG | |
| 351 | MLX4_MPT_PD_FLAG_RAE); |
| 352 | mpt_entry->mtt_sz = cpu_to_be32((1 << mr->mtt.order) * |
Eli Cohen | ab6bf42 | 2009-05-27 14:38:34 -0700 | [diff] [blame] | 353 | dev->caps.mtts_per_seg); |
Roland Dreier | 95d04f0 | 2008-07-23 08:12:26 -0700 | [diff] [blame] | 354 | } else { |
| 355 | mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_SW_OWNS); |
| 356 | } |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 357 | |
| 358 | err = mlx4_SW2HW_MPT(dev, mailbox, |
| 359 | key_to_hw_index(mr->key) & (dev->caps.num_mpts - 1)); |
| 360 | if (err) { |
| 361 | mlx4_warn(dev, "SW2HW_MPT failed (%d)\n", err); |
| 362 | goto err_cmd; |
| 363 | } |
| 364 | |
| 365 | mr->enabled = 1; |
| 366 | |
| 367 | mlx4_free_cmd_mailbox(dev, mailbox); |
| 368 | |
| 369 | return 0; |
| 370 | |
| 371 | err_cmd: |
| 372 | mlx4_free_cmd_mailbox(dev, mailbox); |
| 373 | |
| 374 | err_table: |
| 375 | mlx4_table_put(dev, &mr_table->dmpt_table, key_to_hw_index(mr->key)); |
| 376 | return err; |
| 377 | } |
| 378 | EXPORT_SYMBOL_GPL(mlx4_mr_enable); |
| 379 | |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 380 | static int mlx4_write_mtt_chunk(struct mlx4_dev *dev, struct mlx4_mtt *mtt, |
| 381 | int start_index, int npages, u64 *page_list) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 382 | { |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 383 | struct mlx4_priv *priv = mlx4_priv(dev); |
| 384 | __be64 *mtts; |
| 385 | dma_addr_t dma_handle; |
| 386 | int i; |
| 387 | int s = start_index * sizeof (u64); |
| 388 | |
| 389 | /* All MTTs must fit in the same page */ |
| 390 | if (start_index / (PAGE_SIZE / sizeof (u64)) != |
| 391 | (start_index + npages - 1) / (PAGE_SIZE / sizeof (u64))) |
| 392 | return -EINVAL; |
| 393 | |
Eli Cohen | ab6bf42 | 2009-05-27 14:38:34 -0700 | [diff] [blame] | 394 | if (start_index & (dev->caps.mtts_per_seg - 1)) |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 395 | return -EINVAL; |
| 396 | |
| 397 | mtts = mlx4_table_find(&priv->mr_table.mtt_table, mtt->first_seg + |
| 398 | s / dev->caps.mtt_entry_sz, &dma_handle); |
| 399 | if (!mtts) |
| 400 | return -ENOMEM; |
| 401 | |
Roland Dreier | e727f5c | 2009-06-22 23:07:56 -0700 | [diff] [blame] | 402 | dma_sync_single_for_cpu(&dev->pdev->dev, dma_handle, |
| 403 | npages * sizeof (u64), DMA_TO_DEVICE); |
| 404 | |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 405 | for (i = 0; i < npages; ++i) |
| 406 | mtts[i] = cpu_to_be64(page_list[i] | MLX4_MTT_FLAG_PRESENT); |
| 407 | |
Roland Dreier | e727f5c | 2009-06-22 23:07:56 -0700 | [diff] [blame] | 408 | dma_sync_single_for_device(&dev->pdev->dev, dma_handle, |
| 409 | npages * sizeof (u64), DMA_TO_DEVICE); |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 410 | |
| 411 | return 0; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | int mlx4_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt, |
| 415 | int start_index, int npages, u64 *page_list) |
| 416 | { |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 417 | int chunk; |
| 418 | int err; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 419 | |
| 420 | if (mtt->order < 0) |
| 421 | return -EINVAL; |
| 422 | |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 423 | while (npages > 0) { |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 424 | chunk = min_t(int, PAGE_SIZE / sizeof(u64), npages); |
| 425 | err = mlx4_write_mtt_chunk(dev, mtt, start_index, chunk, page_list); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 426 | if (err) |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 427 | return err; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 428 | |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 429 | npages -= chunk; |
| 430 | start_index += chunk; |
| 431 | page_list += chunk; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 432 | } |
| 433 | |
Jack Morgenstein | d7bb58f | 2007-08-01 12:28:53 +0300 | [diff] [blame] | 434 | return 0; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 435 | } |
| 436 | EXPORT_SYMBOL_GPL(mlx4_write_mtt); |
| 437 | |
| 438 | int mlx4_buf_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt, |
| 439 | struct mlx4_buf *buf) |
| 440 | { |
| 441 | u64 *page_list; |
| 442 | int err; |
| 443 | int i; |
| 444 | |
| 445 | page_list = kmalloc(buf->npages * sizeof *page_list, GFP_KERNEL); |
| 446 | if (!page_list) |
| 447 | return -ENOMEM; |
| 448 | |
| 449 | for (i = 0; i < buf->npages; ++i) |
| 450 | if (buf->nbufs == 1) |
Roland Dreier | b57aacf | 2008-02-06 21:17:59 -0800 | [diff] [blame] | 451 | page_list[i] = buf->direct.map + (i << buf->page_shift); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 452 | else |
Roland Dreier | b57aacf | 2008-02-06 21:17:59 -0800 | [diff] [blame] | 453 | page_list[i] = buf->page_list[i].map; |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 454 | |
| 455 | err = mlx4_write_mtt(dev, mtt, 0, buf->npages, page_list); |
| 456 | |
| 457 | kfree(page_list); |
| 458 | return err; |
| 459 | } |
| 460 | EXPORT_SYMBOL_GPL(mlx4_buf_write_mtt); |
| 461 | |
Roland Dreier | 3d73c28 | 2007-10-10 15:43:54 -0700 | [diff] [blame] | 462 | int mlx4_init_mr_table(struct mlx4_dev *dev) |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 463 | { |
| 464 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; |
| 465 | int err; |
| 466 | |
| 467 | err = mlx4_bitmap_init(&mr_table->mpt_bitmap, dev->caps.num_mpts, |
Yevgeny Petrilin | 93fc9e1 | 2008-10-22 10:25:29 -0700 | [diff] [blame] | 468 | ~0, dev->caps.reserved_mrws, 0); |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 469 | if (err) |
| 470 | return err; |
| 471 | |
| 472 | err = mlx4_buddy_init(&mr_table->mtt_buddy, |
| 473 | ilog2(dev->caps.num_mtt_segs)); |
| 474 | if (err) |
| 475 | goto err_buddy; |
| 476 | |
| 477 | if (dev->caps.reserved_mtts) { |
Roland Dreier | cf78237 | 2007-10-09 19:59:16 -0700 | [diff] [blame] | 478 | if (mlx4_alloc_mtt_range(dev, fls(dev->caps.reserved_mtts - 1)) == -1) { |
Roland Dreier | 225c7b1 | 2007-05-08 18:00:38 -0700 | [diff] [blame] | 479 | mlx4_warn(dev, "MTT table of order %d is too small.\n", |
| 480 | mr_table->mtt_buddy.max_order); |
| 481 | err = -ENOMEM; |
| 482 | goto err_reserve_mtts; |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | return 0; |
| 487 | |
| 488 | err_reserve_mtts: |
| 489 | mlx4_buddy_cleanup(&mr_table->mtt_buddy); |
| 490 | |
| 491 | err_buddy: |
| 492 | mlx4_bitmap_cleanup(&mr_table->mpt_bitmap); |
| 493 | |
| 494 | return err; |
| 495 | } |
| 496 | |
| 497 | void mlx4_cleanup_mr_table(struct mlx4_dev *dev) |
| 498 | { |
| 499 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; |
| 500 | |
| 501 | mlx4_buddy_cleanup(&mr_table->mtt_buddy); |
| 502 | mlx4_bitmap_cleanup(&mr_table->mpt_bitmap); |
| 503 | } |
Jack Morgenstein | 8ad11fb | 2007-08-01 12:29:05 +0300 | [diff] [blame] | 504 | |
| 505 | static inline int mlx4_check_fmr(struct mlx4_fmr *fmr, u64 *page_list, |
| 506 | int npages, u64 iova) |
| 507 | { |
| 508 | int i, page_mask; |
| 509 | |
| 510 | if (npages > fmr->max_pages) |
| 511 | return -EINVAL; |
| 512 | |
| 513 | page_mask = (1 << fmr->page_shift) - 1; |
| 514 | |
| 515 | /* We are getting page lists, so va must be page aligned. */ |
| 516 | if (iova & page_mask) |
| 517 | return -EINVAL; |
| 518 | |
| 519 | /* Trust the user not to pass misaligned data in page_list */ |
| 520 | if (0) |
| 521 | for (i = 0; i < npages; ++i) { |
| 522 | if (page_list[i] & ~page_mask) |
| 523 | return -EINVAL; |
| 524 | } |
| 525 | |
| 526 | if (fmr->maps >= fmr->max_maps) |
| 527 | return -EINVAL; |
| 528 | |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | int mlx4_map_phys_fmr(struct mlx4_dev *dev, struct mlx4_fmr *fmr, u64 *page_list, |
| 533 | int npages, u64 iova, u32 *lkey, u32 *rkey) |
| 534 | { |
| 535 | u32 key; |
| 536 | int i, err; |
| 537 | |
| 538 | err = mlx4_check_fmr(fmr, page_list, npages, iova); |
| 539 | if (err) |
| 540 | return err; |
| 541 | |
| 542 | ++fmr->maps; |
| 543 | |
| 544 | key = key_to_hw_index(fmr->mr.key); |
| 545 | key += dev->caps.num_mpts; |
| 546 | *lkey = *rkey = fmr->mr.key = hw_index_to_key(key); |
| 547 | |
| 548 | *(u8 *) fmr->mpt = MLX4_MPT_STATUS_SW; |
| 549 | |
| 550 | /* Make sure MPT status is visible before writing MTT entries */ |
| 551 | wmb(); |
| 552 | |
Roland Dreier | e727f5c | 2009-06-22 23:07:56 -0700 | [diff] [blame] | 553 | dma_sync_single_for_cpu(&dev->pdev->dev, fmr->dma_handle, |
| 554 | npages * sizeof(u64), DMA_TO_DEVICE); |
| 555 | |
Jack Morgenstein | 8ad11fb | 2007-08-01 12:29:05 +0300 | [diff] [blame] | 556 | for (i = 0; i < npages; ++i) |
| 557 | fmr->mtts[i] = cpu_to_be64(page_list[i] | MLX4_MTT_FLAG_PRESENT); |
| 558 | |
Roland Dreier | e727f5c | 2009-06-22 23:07:56 -0700 | [diff] [blame] | 559 | dma_sync_single_for_device(&dev->pdev->dev, fmr->dma_handle, |
| 560 | npages * sizeof(u64), DMA_TO_DEVICE); |
Jack Morgenstein | 8ad11fb | 2007-08-01 12:29:05 +0300 | [diff] [blame] | 561 | |
| 562 | fmr->mpt->key = cpu_to_be32(key); |
| 563 | fmr->mpt->lkey = cpu_to_be32(key); |
| 564 | fmr->mpt->length = cpu_to_be64(npages * (1ull << fmr->page_shift)); |
| 565 | fmr->mpt->start = cpu_to_be64(iova); |
| 566 | |
| 567 | /* Make MTT entries are visible before setting MPT status */ |
| 568 | wmb(); |
| 569 | |
| 570 | *(u8 *) fmr->mpt = MLX4_MPT_STATUS_HW; |
| 571 | |
| 572 | /* Make sure MPT status is visible before consumer can use FMR */ |
| 573 | wmb(); |
| 574 | |
| 575 | return 0; |
| 576 | } |
| 577 | EXPORT_SYMBOL_GPL(mlx4_map_phys_fmr); |
| 578 | |
| 579 | int mlx4_fmr_alloc(struct mlx4_dev *dev, u32 pd, u32 access, int max_pages, |
| 580 | int max_maps, u8 page_shift, struct mlx4_fmr *fmr) |
| 581 | { |
| 582 | struct mlx4_priv *priv = mlx4_priv(dev); |
| 583 | u64 mtt_seg; |
| 584 | int err = -ENOMEM; |
| 585 | |
Oren Duer | c5057dd | 2008-05-05 15:56:52 -0700 | [diff] [blame] | 586 | if (page_shift < (ffs(dev->caps.page_size_cap) - 1) || page_shift >= 32) |
Jack Morgenstein | 8ad11fb | 2007-08-01 12:29:05 +0300 | [diff] [blame] | 587 | return -EINVAL; |
| 588 | |
| 589 | /* All MTTs must fit in the same page */ |
| 590 | if (max_pages * sizeof *fmr->mtts > PAGE_SIZE) |
| 591 | return -EINVAL; |
| 592 | |
| 593 | fmr->page_shift = page_shift; |
| 594 | fmr->max_pages = max_pages; |
| 595 | fmr->max_maps = max_maps; |
| 596 | fmr->maps = 0; |
| 597 | |
| 598 | err = mlx4_mr_alloc(dev, pd, 0, 0, access, max_pages, |
| 599 | page_shift, &fmr->mr); |
| 600 | if (err) |
| 601 | return err; |
| 602 | |
| 603 | mtt_seg = fmr->mr.mtt.first_seg * dev->caps.mtt_entry_sz; |
| 604 | |
| 605 | fmr->mtts = mlx4_table_find(&priv->mr_table.mtt_table, |
| 606 | fmr->mr.mtt.first_seg, |
| 607 | &fmr->dma_handle); |
| 608 | if (!fmr->mtts) { |
| 609 | err = -ENOMEM; |
| 610 | goto err_free; |
| 611 | } |
| 612 | |
Jack Morgenstein | 8ad11fb | 2007-08-01 12:29:05 +0300 | [diff] [blame] | 613 | return 0; |
| 614 | |
| 615 | err_free: |
| 616 | mlx4_mr_free(dev, &fmr->mr); |
| 617 | return err; |
| 618 | } |
| 619 | EXPORT_SYMBOL_GPL(mlx4_fmr_alloc); |
| 620 | |
| 621 | int mlx4_fmr_enable(struct mlx4_dev *dev, struct mlx4_fmr *fmr) |
| 622 | { |
Jack Morgenstein | 11e75a7 | 2008-02-14 13:41:29 +0200 | [diff] [blame] | 623 | struct mlx4_priv *priv = mlx4_priv(dev); |
| 624 | int err; |
| 625 | |
| 626 | err = mlx4_mr_enable(dev, &fmr->mr); |
| 627 | if (err) |
| 628 | return err; |
| 629 | |
| 630 | fmr->mpt = mlx4_table_find(&priv->mr_table.dmpt_table, |
| 631 | key_to_hw_index(fmr->mr.key), NULL); |
| 632 | if (!fmr->mpt) |
| 633 | return -ENOMEM; |
| 634 | |
| 635 | return 0; |
Jack Morgenstein | 8ad11fb | 2007-08-01 12:29:05 +0300 | [diff] [blame] | 636 | } |
| 637 | EXPORT_SYMBOL_GPL(mlx4_fmr_enable); |
| 638 | |
| 639 | void mlx4_fmr_unmap(struct mlx4_dev *dev, struct mlx4_fmr *fmr, |
| 640 | u32 *lkey, u32 *rkey) |
| 641 | { |
Jack Morgenstein | 8ad11fb | 2007-08-01 12:29:05 +0300 | [diff] [blame] | 642 | if (!fmr->maps) |
| 643 | return; |
| 644 | |
Jack Morgenstein | 8ad11fb | 2007-08-01 12:29:05 +0300 | [diff] [blame] | 645 | fmr->maps = 0; |
| 646 | |
| 647 | *(u8 *) fmr->mpt = MLX4_MPT_STATUS_SW; |
| 648 | } |
| 649 | EXPORT_SYMBOL_GPL(mlx4_fmr_unmap); |
| 650 | |
| 651 | int mlx4_fmr_free(struct mlx4_dev *dev, struct mlx4_fmr *fmr) |
| 652 | { |
| 653 | if (fmr->maps) |
| 654 | return -EBUSY; |
| 655 | |
| 656 | fmr->mr.enabled = 0; |
| 657 | mlx4_mr_free(dev, &fmr->mr); |
| 658 | |
| 659 | return 0; |
| 660 | } |
| 661 | EXPORT_SYMBOL_GPL(mlx4_fmr_free); |
| 662 | |
| 663 | int mlx4_SYNC_TPT(struct mlx4_dev *dev) |
| 664 | { |
| 665 | return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_SYNC_TPT, 1000); |
| 666 | } |
| 667 | EXPORT_SYMBOL_GPL(mlx4_SYNC_TPT); |