Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is provided under a dual BSD/GPLv2 license. When using or |
| 3 | * redistributing this file, you may do so under either license. |
| 4 | * |
| 5 | * GPL LICENSE SUMMARY |
| 6 | * |
| 7 | * Copyright(c) 2004 - 2009 Intel Corporation. All rights reserved. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms and conditions of the GNU General Public License, |
| 11 | * version 2, as published by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 16 | * more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along with |
| 19 | * this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 21 | * |
| 22 | * The full GNU General Public License is included in this distribution in |
| 23 | * the file called "COPYING". |
| 24 | * |
| 25 | * BSD LICENSE |
| 26 | * |
| 27 | * Copyright(c) 2004-2009 Intel Corporation. All rights reserved. |
| 28 | * |
| 29 | * Redistribution and use in source and binary forms, with or without |
| 30 | * modification, are permitted provided that the following conditions are met: |
| 31 | * |
| 32 | * * Redistributions of source code must retain the above copyright |
| 33 | * notice, this list of conditions and the following disclaimer. |
| 34 | * * Redistributions in binary form must reproduce the above copyright |
| 35 | * notice, this list of conditions and the following disclaimer in |
| 36 | * the documentation and/or other materials provided with the |
| 37 | * distribution. |
| 38 | * * Neither the name of Intel Corporation nor the names of its |
| 39 | * contributors may be used to endorse or promote products derived |
| 40 | * from this software without specific prior written permission. |
| 41 | * |
| 42 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 43 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 44 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 45 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 46 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 47 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 48 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 49 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 50 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 51 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 52 | * POSSIBILITY OF SUCH DAMAGE. |
| 53 | */ |
| 54 | |
| 55 | /* |
| 56 | * Support routines for v3+ hardware |
| 57 | */ |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 58 | #include <linux/module.h> |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 59 | #include <linux/pci.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 60 | #include <linux/gfp.h> |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 61 | #include <linux/dmaengine.h> |
| 62 | #include <linux/dma-mapping.h> |
Paul Gortmaker | 70c7160 | 2011-05-22 16:47:17 -0400 | [diff] [blame] | 63 | #include <linux/prefetch.h> |
Vinod Koul | 949ff5b | 2012-03-13 11:58:12 +0530 | [diff] [blame] | 64 | #include "../dmaengine.h" |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 65 | #include "registers.h" |
| 66 | #include "hw.h" |
| 67 | #include "dma.h" |
| 68 | #include "dma_v2.h" |
| 69 | |
Dan Williams | 59056e8 | 2013-11-13 10:57:18 -0800 | [diff] [blame] | 70 | extern struct kmem_cache *ioat3_sed_cache; |
| 71 | |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 72 | /* ioat hardware assumes at least two sources for raid operations */ |
| 73 | #define src_cnt_to_sw(x) ((x) + 2) |
| 74 | #define src_cnt_to_hw(x) ((x) - 2) |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 75 | #define ndest_to_sw(x) ((x) + 1) |
| 76 | #define ndest_to_hw(x) ((x) - 1) |
| 77 | #define src16_cnt_to_sw(x) ((x) + 9) |
| 78 | #define src16_cnt_to_hw(x) ((x) - 9) |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 79 | |
| 80 | /* provide a lookup table for setting the source address in the base or |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 81 | * extended descriptor of an xor or pq descriptor |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 82 | */ |
Dan Williams | d0b0c8c | 2011-07-22 14:20:46 -0700 | [diff] [blame] | 83 | static const u8 xor_idx_to_desc = 0xe0; |
Andi Kleen | 9b487ce | 2011-06-07 15:26:33 -0700 | [diff] [blame] | 84 | static const u8 xor_idx_to_field[] = { 1, 4, 5, 6, 7, 0, 1, 2 }; |
| 85 | static const u8 pq_idx_to_desc = 0xf8; |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 86 | static const u8 pq16_idx_to_desc[] = { 0, 0, 1, 1, 1, 1, 1, 1, 1, |
| 87 | 2, 2, 2, 2, 2, 2, 2 }; |
Andi Kleen | 9b487ce | 2011-06-07 15:26:33 -0700 | [diff] [blame] | 88 | static const u8 pq_idx_to_field[] = { 1, 4, 5, 0, 1, 2, 4, 5 }; |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 89 | static const u8 pq16_idx_to_field[] = { 1, 4, 1, 2, 3, 4, 5, 6, 7, |
| 90 | 0, 1, 2, 3, 4, 5, 6 }; |
| 91 | |
Dave Jiang | 3f09ede | 2013-03-26 15:43:09 -0700 | [diff] [blame] | 92 | static void ioat3_eh(struct ioat2_dma_chan *ioat); |
| 93 | |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 94 | static void xor_set_src(struct ioat_raw_descriptor *descs[2], |
| 95 | dma_addr_t addr, u32 offset, int idx) |
| 96 | { |
| 97 | struct ioat_raw_descriptor *raw = descs[xor_idx_to_desc >> idx & 1]; |
| 98 | |
| 99 | raw->field[xor_idx_to_field[idx]] = addr + offset; |
| 100 | } |
| 101 | |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 102 | static dma_addr_t pq_get_src(struct ioat_raw_descriptor *descs[2], int idx) |
| 103 | { |
| 104 | struct ioat_raw_descriptor *raw = descs[pq_idx_to_desc >> idx & 1]; |
| 105 | |
| 106 | return raw->field[pq_idx_to_field[idx]]; |
| 107 | } |
| 108 | |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 109 | static dma_addr_t pq16_get_src(struct ioat_raw_descriptor *desc[3], int idx) |
| 110 | { |
| 111 | struct ioat_raw_descriptor *raw = desc[pq16_idx_to_desc[idx]]; |
| 112 | |
| 113 | return raw->field[pq16_idx_to_field[idx]]; |
| 114 | } |
| 115 | |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 116 | static void pq_set_src(struct ioat_raw_descriptor *descs[2], |
| 117 | dma_addr_t addr, u32 offset, u8 coef, int idx) |
| 118 | { |
| 119 | struct ioat_pq_descriptor *pq = (struct ioat_pq_descriptor *) descs[0]; |
| 120 | struct ioat_raw_descriptor *raw = descs[pq_idx_to_desc >> idx & 1]; |
| 121 | |
| 122 | raw->field[pq_idx_to_field[idx]] = addr + offset; |
| 123 | pq->coef[idx] = coef; |
| 124 | } |
| 125 | |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 126 | static bool is_jf_ioat(struct pci_dev *pdev) |
| 127 | { |
| 128 | switch (pdev->device) { |
| 129 | case PCI_DEVICE_ID_INTEL_IOAT_JSF0: |
| 130 | case PCI_DEVICE_ID_INTEL_IOAT_JSF1: |
| 131 | case PCI_DEVICE_ID_INTEL_IOAT_JSF2: |
| 132 | case PCI_DEVICE_ID_INTEL_IOAT_JSF3: |
| 133 | case PCI_DEVICE_ID_INTEL_IOAT_JSF4: |
| 134 | case PCI_DEVICE_ID_INTEL_IOAT_JSF5: |
| 135 | case PCI_DEVICE_ID_INTEL_IOAT_JSF6: |
| 136 | case PCI_DEVICE_ID_INTEL_IOAT_JSF7: |
| 137 | case PCI_DEVICE_ID_INTEL_IOAT_JSF8: |
| 138 | case PCI_DEVICE_ID_INTEL_IOAT_JSF9: |
| 139 | return true; |
| 140 | default: |
| 141 | return false; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | static bool is_snb_ioat(struct pci_dev *pdev) |
| 146 | { |
| 147 | switch (pdev->device) { |
| 148 | case PCI_DEVICE_ID_INTEL_IOAT_SNB0: |
| 149 | case PCI_DEVICE_ID_INTEL_IOAT_SNB1: |
| 150 | case PCI_DEVICE_ID_INTEL_IOAT_SNB2: |
| 151 | case PCI_DEVICE_ID_INTEL_IOAT_SNB3: |
| 152 | case PCI_DEVICE_ID_INTEL_IOAT_SNB4: |
| 153 | case PCI_DEVICE_ID_INTEL_IOAT_SNB5: |
| 154 | case PCI_DEVICE_ID_INTEL_IOAT_SNB6: |
| 155 | case PCI_DEVICE_ID_INTEL_IOAT_SNB7: |
| 156 | case PCI_DEVICE_ID_INTEL_IOAT_SNB8: |
| 157 | case PCI_DEVICE_ID_INTEL_IOAT_SNB9: |
| 158 | return true; |
| 159 | default: |
| 160 | return false; |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | static bool is_ivb_ioat(struct pci_dev *pdev) |
| 165 | { |
| 166 | switch (pdev->device) { |
| 167 | case PCI_DEVICE_ID_INTEL_IOAT_IVB0: |
| 168 | case PCI_DEVICE_ID_INTEL_IOAT_IVB1: |
| 169 | case PCI_DEVICE_ID_INTEL_IOAT_IVB2: |
| 170 | case PCI_DEVICE_ID_INTEL_IOAT_IVB3: |
| 171 | case PCI_DEVICE_ID_INTEL_IOAT_IVB4: |
| 172 | case PCI_DEVICE_ID_INTEL_IOAT_IVB5: |
| 173 | case PCI_DEVICE_ID_INTEL_IOAT_IVB6: |
| 174 | case PCI_DEVICE_ID_INTEL_IOAT_IVB7: |
| 175 | case PCI_DEVICE_ID_INTEL_IOAT_IVB8: |
| 176 | case PCI_DEVICE_ID_INTEL_IOAT_IVB9: |
| 177 | return true; |
| 178 | default: |
| 179 | return false; |
| 180 | } |
| 181 | |
| 182 | } |
| 183 | |
| 184 | static bool is_hsw_ioat(struct pci_dev *pdev) |
| 185 | { |
| 186 | switch (pdev->device) { |
| 187 | case PCI_DEVICE_ID_INTEL_IOAT_HSW0: |
| 188 | case PCI_DEVICE_ID_INTEL_IOAT_HSW1: |
| 189 | case PCI_DEVICE_ID_INTEL_IOAT_HSW2: |
| 190 | case PCI_DEVICE_ID_INTEL_IOAT_HSW3: |
| 191 | case PCI_DEVICE_ID_INTEL_IOAT_HSW4: |
| 192 | case PCI_DEVICE_ID_INTEL_IOAT_HSW5: |
| 193 | case PCI_DEVICE_ID_INTEL_IOAT_HSW6: |
| 194 | case PCI_DEVICE_ID_INTEL_IOAT_HSW7: |
| 195 | case PCI_DEVICE_ID_INTEL_IOAT_HSW8: |
| 196 | case PCI_DEVICE_ID_INTEL_IOAT_HSW9: |
| 197 | return true; |
| 198 | default: |
| 199 | return false; |
| 200 | } |
| 201 | |
| 202 | } |
| 203 | |
| 204 | static bool is_xeon_cb32(struct pci_dev *pdev) |
| 205 | { |
| 206 | return is_jf_ioat(pdev) || is_snb_ioat(pdev) || is_ivb_ioat(pdev) || |
| 207 | is_hsw_ioat(pdev); |
| 208 | } |
| 209 | |
| 210 | static bool is_bwd_ioat(struct pci_dev *pdev) |
| 211 | { |
| 212 | switch (pdev->device) { |
| 213 | case PCI_DEVICE_ID_INTEL_IOAT_BWD0: |
| 214 | case PCI_DEVICE_ID_INTEL_IOAT_BWD1: |
| 215 | case PCI_DEVICE_ID_INTEL_IOAT_BWD2: |
| 216 | case PCI_DEVICE_ID_INTEL_IOAT_BWD3: |
| 217 | return true; |
| 218 | default: |
| 219 | return false; |
| 220 | } |
| 221 | } |
| 222 | |
Dave Jiang | d302398 | 2013-04-10 16:44:32 -0700 | [diff] [blame] | 223 | static bool is_bwd_noraid(struct pci_dev *pdev) |
| 224 | { |
| 225 | switch (pdev->device) { |
| 226 | case PCI_DEVICE_ID_INTEL_IOAT_BWD2: |
| 227 | case PCI_DEVICE_ID_INTEL_IOAT_BWD3: |
| 228 | return true; |
| 229 | default: |
| 230 | return false; |
| 231 | } |
| 232 | |
| 233 | } |
| 234 | |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 235 | static void pq16_set_src(struct ioat_raw_descriptor *desc[3], |
Paul Bolle | e6a5fa6 | 2013-07-20 20:05:05 +0200 | [diff] [blame] | 236 | dma_addr_t addr, u32 offset, u8 coef, unsigned idx) |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 237 | { |
| 238 | struct ioat_pq_descriptor *pq = (struct ioat_pq_descriptor *)desc[0]; |
| 239 | struct ioat_pq16a_descriptor *pq16 = |
| 240 | (struct ioat_pq16a_descriptor *)desc[1]; |
| 241 | struct ioat_raw_descriptor *raw = desc[pq16_idx_to_desc[idx]]; |
| 242 | |
| 243 | raw->field[pq16_idx_to_field[idx]] = addr + offset; |
| 244 | |
| 245 | if (idx < 8) |
| 246 | pq->coef[idx] = coef; |
| 247 | else |
| 248 | pq16->coef[idx - 8] = coef; |
| 249 | } |
| 250 | |
Fengguang Wu | e6a30fe | 2013-04-16 13:41:26 +0800 | [diff] [blame] | 251 | static struct ioat_sed_ent * |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 252 | ioat3_alloc_sed(struct ioatdma_device *device, unsigned int hw_pool) |
| 253 | { |
| 254 | struct ioat_sed_ent *sed; |
| 255 | gfp_t flags = __GFP_ZERO | GFP_ATOMIC; |
| 256 | |
Dan Williams | 59056e8 | 2013-11-13 10:57:18 -0800 | [diff] [blame] | 257 | sed = kmem_cache_alloc(ioat3_sed_cache, flags); |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 258 | if (!sed) |
| 259 | return NULL; |
| 260 | |
| 261 | sed->hw_pool = hw_pool; |
| 262 | sed->hw = dma_pool_alloc(device->sed_hw_pool[hw_pool], |
| 263 | flags, &sed->dma); |
| 264 | if (!sed->hw) { |
Dan Williams | 59056e8 | 2013-11-13 10:57:18 -0800 | [diff] [blame] | 265 | kmem_cache_free(ioat3_sed_cache, sed); |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 266 | return NULL; |
| 267 | } |
| 268 | |
| 269 | return sed; |
| 270 | } |
| 271 | |
Fengguang Wu | e6a30fe | 2013-04-16 13:41:26 +0800 | [diff] [blame] | 272 | static void ioat3_free_sed(struct ioatdma_device *device, struct ioat_sed_ent *sed) |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 273 | { |
| 274 | if (!sed) |
| 275 | return; |
| 276 | |
| 277 | dma_pool_free(device->sed_hw_pool[sed->hw_pool], sed->hw, sed->dma); |
Dan Williams | 59056e8 | 2013-11-13 10:57:18 -0800 | [diff] [blame] | 278 | kmem_cache_free(ioat3_sed_cache, sed); |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 279 | } |
| 280 | |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 281 | static bool desc_has_ext(struct ioat_ring_ent *desc) |
| 282 | { |
| 283 | struct ioat_dma_descriptor *hw = desc->hw; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 284 | |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 285 | if (hw->ctl_f.op == IOAT_OP_XOR || |
| 286 | hw->ctl_f.op == IOAT_OP_XOR_VAL) { |
| 287 | struct ioat_xor_descriptor *xor = desc->xor; |
| 288 | |
| 289 | if (src_cnt_to_sw(xor->ctl_f.src_cnt) > 5) |
| 290 | return true; |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 291 | } else if (hw->ctl_f.op == IOAT_OP_PQ || |
| 292 | hw->ctl_f.op == IOAT_OP_PQ_VAL) { |
| 293 | struct ioat_pq_descriptor *pq = desc->pq; |
| 294 | |
| 295 | if (src_cnt_to_sw(pq->ctl_f.src_cnt) > 3) |
| 296 | return true; |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | return false; |
| 300 | } |
| 301 | |
Dave Jiang | 3f09ede | 2013-03-26 15:43:09 -0700 | [diff] [blame] | 302 | static u64 ioat3_get_current_completion(struct ioat_chan_common *chan) |
| 303 | { |
| 304 | u64 phys_complete; |
| 305 | u64 completion; |
| 306 | |
| 307 | completion = *chan->completion; |
| 308 | phys_complete = ioat_chansts_to_addr(completion); |
| 309 | |
| 310 | dev_dbg(to_dev(chan), "%s: phys_complete: %#llx\n", __func__, |
| 311 | (unsigned long long) phys_complete); |
| 312 | |
| 313 | return phys_complete; |
| 314 | } |
| 315 | |
| 316 | static bool ioat3_cleanup_preamble(struct ioat_chan_common *chan, |
| 317 | u64 *phys_complete) |
| 318 | { |
| 319 | *phys_complete = ioat3_get_current_completion(chan); |
| 320 | if (*phys_complete == chan->last_completion) |
| 321 | return false; |
| 322 | |
| 323 | clear_bit(IOAT_COMPLETION_ACK, &chan->state); |
| 324 | mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT); |
| 325 | |
| 326 | return true; |
| 327 | } |
| 328 | |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 329 | static void |
| 330 | desc_get_errstat(struct ioat2_dma_chan *ioat, struct ioat_ring_ent *desc) |
| 331 | { |
| 332 | struct ioat_dma_descriptor *hw = desc->hw; |
| 333 | |
| 334 | switch (hw->ctl_f.op) { |
| 335 | case IOAT_OP_PQ_VAL: |
| 336 | case IOAT_OP_PQ_VAL_16S: |
| 337 | { |
| 338 | struct ioat_pq_descriptor *pq = desc->pq; |
| 339 | |
| 340 | /* check if there's error written */ |
| 341 | if (!pq->dwbes_f.wbes) |
| 342 | return; |
| 343 | |
| 344 | /* need to set a chanerr var for checking to clear later */ |
| 345 | |
| 346 | if (pq->dwbes_f.p_val_err) |
| 347 | *desc->result |= SUM_CHECK_P_RESULT; |
| 348 | |
| 349 | if (pq->dwbes_f.q_val_err) |
| 350 | *desc->result |= SUM_CHECK_Q_RESULT; |
| 351 | |
| 352 | return; |
| 353 | } |
| 354 | default: |
| 355 | return; |
| 356 | } |
| 357 | } |
| 358 | |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 359 | /** |
| 360 | * __cleanup - reclaim used descriptors |
| 361 | * @ioat: channel (ring) to clean |
| 362 | * |
| 363 | * The difference from the dma_v2.c __cleanup() is that this routine |
| 364 | * handles extended descriptors and dma-unmapping raid operations. |
| 365 | */ |
Dan Williams | 2750293 | 2012-03-23 13:36:42 -0700 | [diff] [blame] | 366 | static void __cleanup(struct ioat2_dma_chan *ioat, dma_addr_t phys_complete) |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 367 | { |
| 368 | struct ioat_chan_common *chan = &ioat->base; |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 369 | struct ioatdma_device *device = chan->device; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 370 | struct ioat_ring_ent *desc; |
| 371 | bool seen_current = false; |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 372 | int idx = ioat->tail, i; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 373 | u16 active; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 374 | |
| 375 | dev_dbg(to_dev(chan), "%s: head: %#x tail: %#x issued: %#x\n", |
| 376 | __func__, ioat->head, ioat->tail, ioat->issued); |
| 377 | |
Dave Jiang | 3f09ede | 2013-03-26 15:43:09 -0700 | [diff] [blame] | 378 | /* |
| 379 | * At restart of the channel, the completion address and the |
| 380 | * channel status will be 0 due to starting a new chain. Since |
| 381 | * it's new chain and the first descriptor "fails", there is |
| 382 | * nothing to clean up. We do not want to reap the entire submitted |
| 383 | * chain due to this 0 address value and then BUG. |
| 384 | */ |
| 385 | if (!phys_complete) |
| 386 | return; |
| 387 | |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 388 | active = ioat2_ring_active(ioat); |
| 389 | for (i = 0; i < active && !seen_current; i++) { |
| 390 | struct dma_async_tx_descriptor *tx; |
| 391 | |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 392 | smp_read_barrier_depends(); |
| 393 | prefetch(ioat2_get_ring_ent(ioat, idx + i + 1)); |
| 394 | desc = ioat2_get_ring_ent(ioat, idx + i); |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 395 | dump_desc_dbg(ioat, desc); |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 396 | |
| 397 | /* set err stat if we are using dwbes */ |
| 398 | if (device->cap & IOAT_CAP_DWBES) |
| 399 | desc_get_errstat(ioat, desc); |
| 400 | |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 401 | tx = &desc->txd; |
| 402 | if (tx->cookie) { |
Russell King - ARM Linux | f7fbce0 | 2012-03-06 22:35:07 +0000 | [diff] [blame] | 403 | dma_cookie_complete(tx); |
Dan Williams | d38a8c6 | 2013-10-18 19:35:23 +0200 | [diff] [blame] | 404 | dma_descriptor_unmap(tx); |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 405 | if (tx->callback) { |
| 406 | tx->callback(tx->callback_param); |
| 407 | tx->callback = NULL; |
| 408 | } |
| 409 | } |
| 410 | |
| 411 | if (tx->phys == phys_complete) |
| 412 | seen_current = true; |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 413 | |
| 414 | /* skip extended descriptors */ |
| 415 | if (desc_has_ext(desc)) { |
| 416 | BUG_ON(i + 1 >= active); |
| 417 | i++; |
| 418 | } |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 419 | |
| 420 | /* cleanup super extended descriptors */ |
| 421 | if (desc->sed) { |
| 422 | ioat3_free_sed(device, desc->sed); |
| 423 | desc->sed = NULL; |
| 424 | } |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 425 | } |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 426 | smp_mb(); /* finish all descriptor reads before incrementing tail */ |
| 427 | ioat->tail = idx + i; |
Dan Williams | aa75db0 | 2010-03-03 21:21:10 -0700 | [diff] [blame] | 428 | BUG_ON(active && !seen_current); /* no active descs have written a completion? */ |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 429 | chan->last_completion = phys_complete; |
Dan Williams | b9cc986 | 2010-03-03 21:21:13 -0700 | [diff] [blame] | 430 | |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 431 | if (active - i == 0) { |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 432 | dev_dbg(to_dev(chan), "%s: cancel completion timeout\n", |
| 433 | __func__); |
| 434 | clear_bit(IOAT_COMPLETION_PENDING, &chan->state); |
| 435 | mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT); |
| 436 | } |
Dan Williams | b9cc986 | 2010-03-03 21:21:13 -0700 | [diff] [blame] | 437 | /* 5 microsecond delay per pending descriptor */ |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 438 | writew(min((5 * (active - i)), IOAT_INTRDELAY_MASK), |
Dan Williams | b9cc986 | 2010-03-03 21:21:13 -0700 | [diff] [blame] | 439 | chan->device->reg_base + IOAT_INTRDELAY_OFFSET); |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 440 | } |
| 441 | |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 442 | static void ioat3_cleanup(struct ioat2_dma_chan *ioat) |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 443 | { |
| 444 | struct ioat_chan_common *chan = &ioat->base; |
Dave Jiang | 3f09ede | 2013-03-26 15:43:09 -0700 | [diff] [blame] | 445 | u64 phys_complete; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 446 | |
Dan Williams | b9cc986 | 2010-03-03 21:21:13 -0700 | [diff] [blame] | 447 | spin_lock_bh(&chan->cleanup_lock); |
Dave Jiang | 3f09ede | 2013-03-26 15:43:09 -0700 | [diff] [blame] | 448 | |
| 449 | if (ioat3_cleanup_preamble(chan, &phys_complete)) |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 450 | __cleanup(ioat, phys_complete); |
Dave Jiang | 3f09ede | 2013-03-26 15:43:09 -0700 | [diff] [blame] | 451 | |
| 452 | if (is_ioat_halted(*chan->completion)) { |
| 453 | u32 chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET); |
| 454 | |
| 455 | if (chanerr & IOAT_CHANERR_HANDLE_MASK) { |
| 456 | mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT); |
| 457 | ioat3_eh(ioat); |
| 458 | } |
| 459 | } |
| 460 | |
Dan Williams | b9cc986 | 2010-03-03 21:21:13 -0700 | [diff] [blame] | 461 | spin_unlock_bh(&chan->cleanup_lock); |
| 462 | } |
| 463 | |
Dan Williams | aa4d72a | 2010-03-03 21:21:13 -0700 | [diff] [blame] | 464 | static void ioat3_cleanup_event(unsigned long data) |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 465 | { |
Dan Williams | aa4d72a | 2010-03-03 21:21:13 -0700 | [diff] [blame] | 466 | struct ioat2_dma_chan *ioat = to_ioat2_chan((void *) data); |
Dan Williams | da87ca4 | 2014-02-19 16:19:35 -0800 | [diff] [blame] | 467 | struct ioat_chan_common *chan = &ioat->base; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 468 | |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 469 | ioat3_cleanup(ioat); |
Dan Williams | da87ca4 | 2014-02-19 16:19:35 -0800 | [diff] [blame] | 470 | if (!test_bit(IOAT_RUN, &chan->state)) |
| 471 | return; |
Dan Williams | 773d9e2 | 2010-03-03 11:47:42 -0700 | [diff] [blame] | 472 | writew(IOAT_CHANCTRL_RUN, ioat->base.reg_base + IOAT_CHANCTRL_OFFSET); |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 473 | } |
| 474 | |
| 475 | static void ioat3_restart_channel(struct ioat2_dma_chan *ioat) |
| 476 | { |
| 477 | struct ioat_chan_common *chan = &ioat->base; |
Dave Jiang | 3f09ede | 2013-03-26 15:43:09 -0700 | [diff] [blame] | 478 | u64 phys_complete; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 479 | |
Dan Williams | b372ec2 | 2010-03-03 11:47:42 -0700 | [diff] [blame] | 480 | ioat2_quiesce(chan, 0); |
Dave Jiang | 3f09ede | 2013-03-26 15:43:09 -0700 | [diff] [blame] | 481 | if (ioat3_cleanup_preamble(chan, &phys_complete)) |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 482 | __cleanup(ioat, phys_complete); |
| 483 | |
| 484 | __ioat2_restart_chan(ioat); |
| 485 | } |
| 486 | |
Dave Jiang | 3f09ede | 2013-03-26 15:43:09 -0700 | [diff] [blame] | 487 | static void ioat3_eh(struct ioat2_dma_chan *ioat) |
| 488 | { |
| 489 | struct ioat_chan_common *chan = &ioat->base; |
| 490 | struct pci_dev *pdev = to_pdev(chan); |
| 491 | struct ioat_dma_descriptor *hw; |
| 492 | u64 phys_complete; |
| 493 | struct ioat_ring_ent *desc; |
| 494 | u32 err_handled = 0; |
| 495 | u32 chanerr_int; |
| 496 | u32 chanerr; |
| 497 | |
| 498 | /* cleanup so tail points to descriptor that caused the error */ |
| 499 | if (ioat3_cleanup_preamble(chan, &phys_complete)) |
| 500 | __cleanup(ioat, phys_complete); |
| 501 | |
| 502 | chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET); |
| 503 | pci_read_config_dword(pdev, IOAT_PCI_CHANERR_INT_OFFSET, &chanerr_int); |
| 504 | |
| 505 | dev_dbg(to_dev(chan), "%s: error = %x:%x\n", |
| 506 | __func__, chanerr, chanerr_int); |
| 507 | |
| 508 | desc = ioat2_get_ring_ent(ioat, ioat->tail); |
| 509 | hw = desc->hw; |
| 510 | dump_desc_dbg(ioat, desc); |
| 511 | |
| 512 | switch (hw->ctl_f.op) { |
| 513 | case IOAT_OP_XOR_VAL: |
| 514 | if (chanerr & IOAT_CHANERR_XOR_P_OR_CRC_ERR) { |
| 515 | *desc->result |= SUM_CHECK_P_RESULT; |
| 516 | err_handled |= IOAT_CHANERR_XOR_P_OR_CRC_ERR; |
| 517 | } |
| 518 | break; |
| 519 | case IOAT_OP_PQ_VAL: |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 520 | case IOAT_OP_PQ_VAL_16S: |
Dave Jiang | 3f09ede | 2013-03-26 15:43:09 -0700 | [diff] [blame] | 521 | if (chanerr & IOAT_CHANERR_XOR_P_OR_CRC_ERR) { |
| 522 | *desc->result |= SUM_CHECK_P_RESULT; |
| 523 | err_handled |= IOAT_CHANERR_XOR_P_OR_CRC_ERR; |
| 524 | } |
| 525 | if (chanerr & IOAT_CHANERR_XOR_Q_ERR) { |
| 526 | *desc->result |= SUM_CHECK_Q_RESULT; |
| 527 | err_handled |= IOAT_CHANERR_XOR_Q_ERR; |
| 528 | } |
| 529 | break; |
| 530 | } |
| 531 | |
| 532 | /* fault on unhandled error or spurious halt */ |
| 533 | if (chanerr ^ err_handled || chanerr == 0) { |
| 534 | dev_err(to_dev(chan), "%s: fatal error (%x:%x)\n", |
| 535 | __func__, chanerr, err_handled); |
| 536 | BUG(); |
| 537 | } |
| 538 | |
| 539 | writel(chanerr, chan->reg_base + IOAT_CHANERR_OFFSET); |
| 540 | pci_write_config_dword(pdev, IOAT_PCI_CHANERR_INT_OFFSET, chanerr_int); |
| 541 | |
| 542 | /* mark faulting descriptor as complete */ |
| 543 | *chan->completion = desc->txd.phys; |
| 544 | |
| 545 | spin_lock_bh(&ioat->prep_lock); |
| 546 | ioat3_restart_channel(ioat); |
| 547 | spin_unlock_bh(&ioat->prep_lock); |
| 548 | } |
| 549 | |
Dave Jiang | 4dec23d | 2013-02-07 14:38:32 -0700 | [diff] [blame] | 550 | static void check_active(struct ioat2_dma_chan *ioat) |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 551 | { |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 552 | struct ioat_chan_common *chan = &ioat->base; |
| 553 | |
Dave Jiang | 4dec23d | 2013-02-07 14:38:32 -0700 | [diff] [blame] | 554 | if (ioat2_ring_active(ioat)) { |
| 555 | mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT); |
| 556 | return; |
| 557 | } |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 558 | |
Dave Jiang | 4dec23d | 2013-02-07 14:38:32 -0700 | [diff] [blame] | 559 | if (test_and_clear_bit(IOAT_CHAN_ACTIVE, &chan->state)) |
| 560 | mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT); |
| 561 | else if (ioat->alloc_order > ioat_get_alloc_order()) { |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 562 | /* if the ring is idle, empty, and oversized try to step |
| 563 | * down the size |
| 564 | */ |
Dave Jiang | 4dec23d | 2013-02-07 14:38:32 -0700 | [diff] [blame] | 565 | reshape_ring(ioat, ioat->alloc_order - 1); |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 566 | |
| 567 | /* keep shrinking until we get back to our minimum |
| 568 | * default size |
| 569 | */ |
| 570 | if (ioat->alloc_order > ioat_get_alloc_order()) |
| 571 | mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT); |
| 572 | } |
Dave Jiang | 4dec23d | 2013-02-07 14:38:32 -0700 | [diff] [blame] | 573 | |
| 574 | } |
| 575 | |
Fengguang Wu | a20702b | 2013-02-13 09:40:03 +0800 | [diff] [blame] | 576 | static void ioat3_timer_event(unsigned long data) |
Dave Jiang | 4dec23d | 2013-02-07 14:38:32 -0700 | [diff] [blame] | 577 | { |
| 578 | struct ioat2_dma_chan *ioat = to_ioat2_chan((void *) data); |
| 579 | struct ioat_chan_common *chan = &ioat->base; |
| 580 | dma_addr_t phys_complete; |
| 581 | u64 status; |
| 582 | |
| 583 | status = ioat_chansts(chan); |
| 584 | |
| 585 | /* when halted due to errors check for channel |
| 586 | * programming errors before advancing the completion state |
| 587 | */ |
| 588 | if (is_ioat_halted(status)) { |
| 589 | u32 chanerr; |
| 590 | |
| 591 | chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET); |
| 592 | dev_err(to_dev(chan), "%s: Channel halted (%x)\n", |
| 593 | __func__, chanerr); |
| 594 | if (test_bit(IOAT_RUN, &chan->state)) |
| 595 | BUG_ON(is_ioat_bug(chanerr)); |
| 596 | else /* we never got off the ground */ |
| 597 | return; |
| 598 | } |
| 599 | |
| 600 | /* if we haven't made progress and we have already |
| 601 | * acknowledged a pending completion once, then be more |
| 602 | * forceful with a restart |
| 603 | */ |
| 604 | spin_lock_bh(&chan->cleanup_lock); |
| 605 | if (ioat_cleanup_preamble(chan, &phys_complete)) |
| 606 | __cleanup(ioat, phys_complete); |
| 607 | else if (test_bit(IOAT_COMPLETION_ACK, &chan->state)) { |
| 608 | spin_lock_bh(&ioat->prep_lock); |
| 609 | ioat3_restart_channel(ioat); |
| 610 | spin_unlock_bh(&ioat->prep_lock); |
| 611 | spin_unlock_bh(&chan->cleanup_lock); |
| 612 | return; |
| 613 | } else { |
| 614 | set_bit(IOAT_COMPLETION_ACK, &chan->state); |
| 615 | mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT); |
| 616 | } |
| 617 | |
| 618 | |
| 619 | if (ioat2_ring_active(ioat)) |
| 620 | mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT); |
| 621 | else { |
| 622 | spin_lock_bh(&ioat->prep_lock); |
| 623 | check_active(ioat); |
| 624 | spin_unlock_bh(&ioat->prep_lock); |
| 625 | } |
| 626 | spin_unlock_bh(&chan->cleanup_lock); |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 627 | } |
| 628 | |
| 629 | static enum dma_status |
Linus Walleij | 0793448 | 2010-03-26 16:50:49 -0700 | [diff] [blame] | 630 | ioat3_tx_status(struct dma_chan *c, dma_cookie_t cookie, |
| 631 | struct dma_tx_state *txstate) |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 632 | { |
| 633 | struct ioat2_dma_chan *ioat = to_ioat2_chan(c); |
Russell King - ARM Linux | 96a2af4 | 2012-03-06 22:35:27 +0000 | [diff] [blame] | 634 | enum dma_status ret; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 635 | |
Russell King - ARM Linux | 96a2af4 | 2012-03-06 22:35:27 +0000 | [diff] [blame] | 636 | ret = dma_cookie_status(c, cookie, txstate); |
Vinod Koul | 2f16f80 | 2013-10-16 20:48:52 +0530 | [diff] [blame] | 637 | if (ret == DMA_COMPLETE) |
Russell King - ARM Linux | 96a2af4 | 2012-03-06 22:35:27 +0000 | [diff] [blame] | 638 | return ret; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 639 | |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 640 | ioat3_cleanup(ioat); |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 641 | |
Russell King - ARM Linux | 96a2af4 | 2012-03-06 22:35:27 +0000 | [diff] [blame] | 642 | return dma_cookie_status(c, cookie, txstate); |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 643 | } |
| 644 | |
| 645 | static struct dma_async_tx_descriptor * |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 646 | __ioat3_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result, |
| 647 | dma_addr_t dest, dma_addr_t *src, unsigned int src_cnt, |
| 648 | size_t len, unsigned long flags) |
| 649 | { |
| 650 | struct ioat2_dma_chan *ioat = to_ioat2_chan(c); |
| 651 | struct ioat_ring_ent *compl_desc; |
| 652 | struct ioat_ring_ent *desc; |
| 653 | struct ioat_ring_ent *ext; |
| 654 | size_t total_len = len; |
| 655 | struct ioat_xor_descriptor *xor; |
| 656 | struct ioat_xor_ext_descriptor *xor_ex = NULL; |
| 657 | struct ioat_dma_descriptor *hw; |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 658 | int num_descs, with_ext, idx, i; |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 659 | u32 offset = 0; |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 660 | u8 op = result ? IOAT_OP_XOR_VAL : IOAT_OP_XOR; |
| 661 | |
| 662 | BUG_ON(src_cnt < 2); |
| 663 | |
| 664 | num_descs = ioat2_xferlen_to_descs(ioat, len); |
| 665 | /* we need 2x the number of descriptors to cover greater than 5 |
| 666 | * sources |
| 667 | */ |
| 668 | if (src_cnt > 5) { |
| 669 | with_ext = 1; |
| 670 | num_descs *= 2; |
| 671 | } else |
| 672 | with_ext = 0; |
| 673 | |
| 674 | /* completion writes from the raid engine may pass completion |
| 675 | * writes from the legacy engine, so we need one extra null |
| 676 | * (legacy) descriptor to ensure all completion writes arrive in |
| 677 | * order. |
| 678 | */ |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 679 | if (likely(num_descs) && ioat2_check_space_lock(ioat, num_descs+1) == 0) |
| 680 | idx = ioat->head; |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 681 | else |
| 682 | return NULL; |
Dan Williams | cdef57d | 2009-09-21 09:22:29 -0700 | [diff] [blame] | 683 | i = 0; |
| 684 | do { |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 685 | struct ioat_raw_descriptor *descs[2]; |
| 686 | size_t xfer_size = min_t(size_t, len, 1 << ioat->xfercap_log); |
| 687 | int s; |
| 688 | |
| 689 | desc = ioat2_get_ring_ent(ioat, idx + i); |
| 690 | xor = desc->xor; |
| 691 | |
| 692 | /* save a branch by unconditionally retrieving the |
| 693 | * extended descriptor xor_set_src() knows to not write |
| 694 | * to it in the single descriptor case |
| 695 | */ |
| 696 | ext = ioat2_get_ring_ent(ioat, idx + i + 1); |
| 697 | xor_ex = ext->xor_ex; |
| 698 | |
| 699 | descs[0] = (struct ioat_raw_descriptor *) xor; |
| 700 | descs[1] = (struct ioat_raw_descriptor *) xor_ex; |
| 701 | for (s = 0; s < src_cnt; s++) |
| 702 | xor_set_src(descs, src[s], offset, s); |
| 703 | xor->size = xfer_size; |
| 704 | xor->dst_addr = dest + offset; |
| 705 | xor->ctl = 0; |
| 706 | xor->ctl_f.op = op; |
| 707 | xor->ctl_f.src_cnt = src_cnt_to_hw(src_cnt); |
| 708 | |
| 709 | len -= xfer_size; |
| 710 | offset += xfer_size; |
| 711 | dump_desc_dbg(ioat, desc); |
Dan Williams | cdef57d | 2009-09-21 09:22:29 -0700 | [diff] [blame] | 712 | } while ((i += 1 + with_ext) < num_descs); |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 713 | |
| 714 | /* last xor descriptor carries the unmap parameters and fence bit */ |
| 715 | desc->txd.flags = flags; |
| 716 | desc->len = total_len; |
| 717 | if (result) |
| 718 | desc->result = result; |
| 719 | xor->ctl_f.fence = !!(flags & DMA_PREP_FENCE); |
| 720 | |
| 721 | /* completion descriptor carries interrupt bit */ |
| 722 | compl_desc = ioat2_get_ring_ent(ioat, idx + i); |
| 723 | compl_desc->txd.flags = flags & DMA_PREP_INTERRUPT; |
| 724 | hw = compl_desc->hw; |
| 725 | hw->ctl = 0; |
| 726 | hw->ctl_f.null = 1; |
| 727 | hw->ctl_f.int_en = !!(flags & DMA_PREP_INTERRUPT); |
| 728 | hw->ctl_f.compl_write = 1; |
| 729 | hw->size = NULL_DESC_BUFFER_SIZE; |
| 730 | dump_desc_dbg(ioat, compl_desc); |
| 731 | |
| 732 | /* we leave the channel locked to ensure in order submission */ |
Dan Williams | 49954c1 | 2009-11-19 17:11:03 -0700 | [diff] [blame] | 733 | return &compl_desc->txd; |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 734 | } |
| 735 | |
| 736 | static struct dma_async_tx_descriptor * |
| 737 | ioat3_prep_xor(struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src, |
| 738 | unsigned int src_cnt, size_t len, unsigned long flags) |
| 739 | { |
| 740 | return __ioat3_prep_xor_lock(chan, NULL, dest, src, src_cnt, len, flags); |
| 741 | } |
| 742 | |
| 743 | struct dma_async_tx_descriptor * |
| 744 | ioat3_prep_xor_val(struct dma_chan *chan, dma_addr_t *src, |
| 745 | unsigned int src_cnt, size_t len, |
| 746 | enum sum_check_flags *result, unsigned long flags) |
| 747 | { |
| 748 | /* the cleanup routine only sets bits on validate failure, it |
| 749 | * does not clear bits on validate success... so clear it here |
| 750 | */ |
| 751 | *result = 0; |
| 752 | |
| 753 | return __ioat3_prep_xor_lock(chan, result, src[0], &src[1], |
| 754 | src_cnt - 1, len, flags); |
| 755 | } |
| 756 | |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 757 | static void |
| 758 | dump_pq_desc_dbg(struct ioat2_dma_chan *ioat, struct ioat_ring_ent *desc, struct ioat_ring_ent *ext) |
| 759 | { |
| 760 | struct device *dev = to_dev(&ioat->base); |
| 761 | struct ioat_pq_descriptor *pq = desc->pq; |
| 762 | struct ioat_pq_ext_descriptor *pq_ex = ext ? ext->pq_ex : NULL; |
| 763 | struct ioat_raw_descriptor *descs[] = { (void *) pq, (void *) pq_ex }; |
| 764 | int src_cnt = src_cnt_to_sw(pq->ctl_f.src_cnt); |
| 765 | int i; |
| 766 | |
| 767 | dev_dbg(dev, "desc[%d]: (%#llx->%#llx) flags: %#x" |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 768 | " sz: %#10.8x ctl: %#x (op: %#x int: %d compl: %d pq: '%s%s'" |
| 769 | " src_cnt: %d)\n", |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 770 | desc_id(desc), (unsigned long long) desc->txd.phys, |
| 771 | (unsigned long long) (pq_ex ? pq_ex->next : pq->next), |
| 772 | desc->txd.flags, pq->size, pq->ctl, pq->ctl_f.op, pq->ctl_f.int_en, |
| 773 | pq->ctl_f.compl_write, |
| 774 | pq->ctl_f.p_disable ? "" : "p", pq->ctl_f.q_disable ? "" : "q", |
| 775 | pq->ctl_f.src_cnt); |
| 776 | for (i = 0; i < src_cnt; i++) |
| 777 | dev_dbg(dev, "\tsrc[%d]: %#llx coef: %#x\n", i, |
| 778 | (unsigned long long) pq_get_src(descs, i), pq->coef[i]); |
| 779 | dev_dbg(dev, "\tP: %#llx\n", pq->p_addr); |
| 780 | dev_dbg(dev, "\tQ: %#llx\n", pq->q_addr); |
Dave Jiang | 50f9f97 | 2013-03-04 10:59:54 -0700 | [diff] [blame] | 781 | dev_dbg(dev, "\tNEXT: %#llx\n", pq->next); |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 782 | } |
| 783 | |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 784 | static void dump_pq16_desc_dbg(struct ioat2_dma_chan *ioat, |
| 785 | struct ioat_ring_ent *desc) |
| 786 | { |
| 787 | struct device *dev = to_dev(&ioat->base); |
| 788 | struct ioat_pq_descriptor *pq = desc->pq; |
| 789 | struct ioat_raw_descriptor *descs[] = { (void *)pq, |
| 790 | (void *)pq, |
| 791 | (void *)pq }; |
| 792 | int src_cnt = src16_cnt_to_sw(pq->ctl_f.src_cnt); |
| 793 | int i; |
| 794 | |
| 795 | if (desc->sed) { |
| 796 | descs[1] = (void *)desc->sed->hw; |
| 797 | descs[2] = (void *)desc->sed->hw + 64; |
| 798 | } |
| 799 | |
| 800 | dev_dbg(dev, "desc[%d]: (%#llx->%#llx) flags: %#x" |
| 801 | " sz: %#x ctl: %#x (op: %#x int: %d compl: %d pq: '%s%s'" |
| 802 | " src_cnt: %d)\n", |
| 803 | desc_id(desc), (unsigned long long) desc->txd.phys, |
| 804 | (unsigned long long) pq->next, |
| 805 | desc->txd.flags, pq->size, pq->ctl, |
| 806 | pq->ctl_f.op, pq->ctl_f.int_en, |
| 807 | pq->ctl_f.compl_write, |
| 808 | pq->ctl_f.p_disable ? "" : "p", pq->ctl_f.q_disable ? "" : "q", |
| 809 | pq->ctl_f.src_cnt); |
| 810 | for (i = 0; i < src_cnt; i++) { |
| 811 | dev_dbg(dev, "\tsrc[%d]: %#llx coef: %#x\n", i, |
| 812 | (unsigned long long) pq16_get_src(descs, i), |
| 813 | pq->coef[i]); |
| 814 | } |
| 815 | dev_dbg(dev, "\tP: %#llx\n", pq->p_addr); |
| 816 | dev_dbg(dev, "\tQ: %#llx\n", pq->q_addr); |
| 817 | } |
| 818 | |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 819 | static struct dma_async_tx_descriptor * |
| 820 | __ioat3_prep_pq_lock(struct dma_chan *c, enum sum_check_flags *result, |
| 821 | const dma_addr_t *dst, const dma_addr_t *src, |
| 822 | unsigned int src_cnt, const unsigned char *scf, |
| 823 | size_t len, unsigned long flags) |
| 824 | { |
| 825 | struct ioat2_dma_chan *ioat = to_ioat2_chan(c); |
| 826 | struct ioat_chan_common *chan = &ioat->base; |
Dave Jiang | e088477 | 2013-04-10 16:44:20 -0700 | [diff] [blame] | 827 | struct ioatdma_device *device = chan->device; |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 828 | struct ioat_ring_ent *compl_desc; |
| 829 | struct ioat_ring_ent *desc; |
| 830 | struct ioat_ring_ent *ext; |
| 831 | size_t total_len = len; |
| 832 | struct ioat_pq_descriptor *pq; |
| 833 | struct ioat_pq_ext_descriptor *pq_ex = NULL; |
| 834 | struct ioat_dma_descriptor *hw; |
| 835 | u32 offset = 0; |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 836 | u8 op = result ? IOAT_OP_PQ_VAL : IOAT_OP_PQ; |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 837 | int i, s, idx, with_ext, num_descs; |
Dave Jiang | e088477 | 2013-04-10 16:44:20 -0700 | [diff] [blame] | 838 | int cb32 = (device->version < IOAT_VER_3_3) ? 1 : 0; |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 839 | |
| 840 | dev_dbg(to_dev(chan), "%s\n", __func__); |
| 841 | /* the engine requires at least two sources (we provide |
| 842 | * at least 1 implied source in the DMA_PREP_CONTINUE case) |
| 843 | */ |
| 844 | BUG_ON(src_cnt + dmaf_continue(flags) < 2); |
| 845 | |
| 846 | num_descs = ioat2_xferlen_to_descs(ioat, len); |
| 847 | /* we need 2x the number of descriptors to cover greater than 3 |
Dan Williams | cd78809 | 2009-12-17 13:52:39 -0700 | [diff] [blame] | 848 | * sources (we need 1 extra source in the q-only continuation |
| 849 | * case and 3 extra sources in the p+q continuation case. |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 850 | */ |
Dan Williams | cd78809 | 2009-12-17 13:52:39 -0700 | [diff] [blame] | 851 | if (src_cnt + dmaf_p_disabled_continue(flags) > 3 || |
| 852 | (dmaf_continue(flags) && !dmaf_p_disabled_continue(flags))) { |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 853 | with_ext = 1; |
| 854 | num_descs *= 2; |
| 855 | } else |
| 856 | with_ext = 0; |
| 857 | |
| 858 | /* completion writes from the raid engine may pass completion |
| 859 | * writes from the legacy engine, so we need one extra null |
| 860 | * (legacy) descriptor to ensure all completion writes arrive in |
| 861 | * order. |
| 862 | */ |
| 863 | if (likely(num_descs) && |
Dave Jiang | e088477 | 2013-04-10 16:44:20 -0700 | [diff] [blame] | 864 | ioat2_check_space_lock(ioat, num_descs + cb32) == 0) |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 865 | idx = ioat->head; |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 866 | else |
| 867 | return NULL; |
Dan Williams | cdef57d | 2009-09-21 09:22:29 -0700 | [diff] [blame] | 868 | i = 0; |
| 869 | do { |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 870 | struct ioat_raw_descriptor *descs[2]; |
| 871 | size_t xfer_size = min_t(size_t, len, 1 << ioat->xfercap_log); |
| 872 | |
| 873 | desc = ioat2_get_ring_ent(ioat, idx + i); |
| 874 | pq = desc->pq; |
| 875 | |
| 876 | /* save a branch by unconditionally retrieving the |
| 877 | * extended descriptor pq_set_src() knows to not write |
| 878 | * to it in the single descriptor case |
| 879 | */ |
| 880 | ext = ioat2_get_ring_ent(ioat, idx + i + with_ext); |
| 881 | pq_ex = ext->pq_ex; |
| 882 | |
| 883 | descs[0] = (struct ioat_raw_descriptor *) pq; |
| 884 | descs[1] = (struct ioat_raw_descriptor *) pq_ex; |
| 885 | |
| 886 | for (s = 0; s < src_cnt; s++) |
| 887 | pq_set_src(descs, src[s], offset, scf[s], s); |
| 888 | |
| 889 | /* see the comment for dma_maxpq in include/linux/dmaengine.h */ |
| 890 | if (dmaf_p_disabled_continue(flags)) |
| 891 | pq_set_src(descs, dst[1], offset, 1, s++); |
| 892 | else if (dmaf_continue(flags)) { |
| 893 | pq_set_src(descs, dst[0], offset, 0, s++); |
| 894 | pq_set_src(descs, dst[1], offset, 1, s++); |
| 895 | pq_set_src(descs, dst[1], offset, 0, s++); |
| 896 | } |
| 897 | pq->size = xfer_size; |
| 898 | pq->p_addr = dst[0] + offset; |
| 899 | pq->q_addr = dst[1] + offset; |
| 900 | pq->ctl = 0; |
| 901 | pq->ctl_f.op = op; |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 902 | /* we turn on descriptor write back error status */ |
| 903 | if (device->cap & IOAT_CAP_DWBES) |
| 904 | pq->ctl_f.wb_en = result ? 1 : 0; |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 905 | pq->ctl_f.src_cnt = src_cnt_to_hw(s); |
| 906 | pq->ctl_f.p_disable = !!(flags & DMA_PREP_PQ_DISABLE_P); |
| 907 | pq->ctl_f.q_disable = !!(flags & DMA_PREP_PQ_DISABLE_Q); |
| 908 | |
| 909 | len -= xfer_size; |
| 910 | offset += xfer_size; |
Dan Williams | cdef57d | 2009-09-21 09:22:29 -0700 | [diff] [blame] | 911 | } while ((i += 1 + with_ext) < num_descs); |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 912 | |
| 913 | /* last pq descriptor carries the unmap parameters and fence bit */ |
| 914 | desc->txd.flags = flags; |
| 915 | desc->len = total_len; |
| 916 | if (result) |
| 917 | desc->result = result; |
| 918 | pq->ctl_f.fence = !!(flags & DMA_PREP_FENCE); |
| 919 | dump_pq_desc_dbg(ioat, desc, ext); |
| 920 | |
Dave Jiang | e088477 | 2013-04-10 16:44:20 -0700 | [diff] [blame] | 921 | if (!cb32) { |
| 922 | pq->ctl_f.int_en = !!(flags & DMA_PREP_INTERRUPT); |
| 923 | pq->ctl_f.compl_write = 1; |
| 924 | compl_desc = desc; |
| 925 | } else { |
| 926 | /* completion descriptor carries interrupt bit */ |
| 927 | compl_desc = ioat2_get_ring_ent(ioat, idx + i); |
| 928 | compl_desc->txd.flags = flags & DMA_PREP_INTERRUPT; |
| 929 | hw = compl_desc->hw; |
| 930 | hw->ctl = 0; |
| 931 | hw->ctl_f.null = 1; |
| 932 | hw->ctl_f.int_en = !!(flags & DMA_PREP_INTERRUPT); |
| 933 | hw->ctl_f.compl_write = 1; |
| 934 | hw->size = NULL_DESC_BUFFER_SIZE; |
| 935 | dump_desc_dbg(ioat, compl_desc); |
| 936 | } |
| 937 | |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 938 | |
| 939 | /* we leave the channel locked to ensure in order submission */ |
Dan Williams | 49954c1 | 2009-11-19 17:11:03 -0700 | [diff] [blame] | 940 | return &compl_desc->txd; |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 941 | } |
| 942 | |
| 943 | static struct dma_async_tx_descriptor * |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 944 | __ioat3_prep_pq16_lock(struct dma_chan *c, enum sum_check_flags *result, |
| 945 | const dma_addr_t *dst, const dma_addr_t *src, |
| 946 | unsigned int src_cnt, const unsigned char *scf, |
| 947 | size_t len, unsigned long flags) |
| 948 | { |
| 949 | struct ioat2_dma_chan *ioat = to_ioat2_chan(c); |
| 950 | struct ioat_chan_common *chan = &ioat->base; |
| 951 | struct ioatdma_device *device = chan->device; |
| 952 | struct ioat_ring_ent *desc; |
| 953 | size_t total_len = len; |
| 954 | struct ioat_pq_descriptor *pq; |
| 955 | u32 offset = 0; |
| 956 | u8 op; |
| 957 | int i, s, idx, num_descs; |
| 958 | |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 959 | /* this function is only called with 9-16 sources */ |
| 960 | op = result ? IOAT_OP_PQ_VAL_16S : IOAT_OP_PQ_16S; |
| 961 | |
| 962 | dev_dbg(to_dev(chan), "%s\n", __func__); |
| 963 | |
| 964 | num_descs = ioat2_xferlen_to_descs(ioat, len); |
| 965 | |
| 966 | /* |
| 967 | * 16 source pq is only available on cb3.3 and has no completion |
| 968 | * write hw bug. |
| 969 | */ |
| 970 | if (num_descs && ioat2_check_space_lock(ioat, num_descs) == 0) |
| 971 | idx = ioat->head; |
| 972 | else |
| 973 | return NULL; |
| 974 | |
| 975 | i = 0; |
| 976 | |
| 977 | do { |
| 978 | struct ioat_raw_descriptor *descs[4]; |
| 979 | size_t xfer_size = min_t(size_t, len, 1 << ioat->xfercap_log); |
| 980 | |
| 981 | desc = ioat2_get_ring_ent(ioat, idx + i); |
| 982 | pq = desc->pq; |
| 983 | |
| 984 | descs[0] = (struct ioat_raw_descriptor *) pq; |
| 985 | |
Dan Williams | 5d48b9b | 2013-11-13 10:15:42 -0800 | [diff] [blame] | 986 | desc->sed = ioat3_alloc_sed(device, (src_cnt-2) >> 3); |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 987 | if (!desc->sed) { |
| 988 | dev_err(to_dev(chan), |
| 989 | "%s: no free sed entries\n", __func__); |
| 990 | return NULL; |
| 991 | } |
| 992 | |
| 993 | pq->sed_addr = desc->sed->dma; |
| 994 | desc->sed->parent = desc; |
| 995 | |
| 996 | descs[1] = (struct ioat_raw_descriptor *)desc->sed->hw; |
| 997 | descs[2] = (void *)descs[1] + 64; |
| 998 | |
| 999 | for (s = 0; s < src_cnt; s++) |
| 1000 | pq16_set_src(descs, src[s], offset, scf[s], s); |
| 1001 | |
| 1002 | /* see the comment for dma_maxpq in include/linux/dmaengine.h */ |
| 1003 | if (dmaf_p_disabled_continue(flags)) |
| 1004 | pq16_set_src(descs, dst[1], offset, 1, s++); |
| 1005 | else if (dmaf_continue(flags)) { |
| 1006 | pq16_set_src(descs, dst[0], offset, 0, s++); |
| 1007 | pq16_set_src(descs, dst[1], offset, 1, s++); |
| 1008 | pq16_set_src(descs, dst[1], offset, 0, s++); |
| 1009 | } |
| 1010 | |
| 1011 | pq->size = xfer_size; |
| 1012 | pq->p_addr = dst[0] + offset; |
| 1013 | pq->q_addr = dst[1] + offset; |
| 1014 | pq->ctl = 0; |
| 1015 | pq->ctl_f.op = op; |
| 1016 | pq->ctl_f.src_cnt = src16_cnt_to_hw(s); |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 1017 | /* we turn on descriptor write back error status */ |
| 1018 | if (device->cap & IOAT_CAP_DWBES) |
| 1019 | pq->ctl_f.wb_en = result ? 1 : 0; |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1020 | pq->ctl_f.p_disable = !!(flags & DMA_PREP_PQ_DISABLE_P); |
| 1021 | pq->ctl_f.q_disable = !!(flags & DMA_PREP_PQ_DISABLE_Q); |
| 1022 | |
| 1023 | len -= xfer_size; |
| 1024 | offset += xfer_size; |
| 1025 | } while (++i < num_descs); |
| 1026 | |
| 1027 | /* last pq descriptor carries the unmap parameters and fence bit */ |
| 1028 | desc->txd.flags = flags; |
| 1029 | desc->len = total_len; |
| 1030 | if (result) |
| 1031 | desc->result = result; |
| 1032 | pq->ctl_f.fence = !!(flags & DMA_PREP_FENCE); |
| 1033 | |
| 1034 | /* with cb3.3 we should be able to do completion w/o a null desc */ |
| 1035 | pq->ctl_f.int_en = !!(flags & DMA_PREP_INTERRUPT); |
| 1036 | pq->ctl_f.compl_write = 1; |
| 1037 | |
| 1038 | dump_pq16_desc_dbg(ioat, desc); |
| 1039 | |
| 1040 | /* we leave the channel locked to ensure in order submission */ |
| 1041 | return &desc->txd; |
| 1042 | } |
| 1043 | |
Dan Williams | 21e96c7 | 2013-11-13 10:37:36 -0800 | [diff] [blame] | 1044 | static int src_cnt_flags(unsigned int src_cnt, unsigned long flags) |
| 1045 | { |
| 1046 | if (dmaf_p_disabled_continue(flags)) |
| 1047 | return src_cnt + 1; |
| 1048 | else if (dmaf_continue(flags)) |
| 1049 | return src_cnt + 3; |
| 1050 | else |
| 1051 | return src_cnt; |
| 1052 | } |
| 1053 | |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1054 | static struct dma_async_tx_descriptor * |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 1055 | ioat3_prep_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src, |
| 1056 | unsigned int src_cnt, const unsigned char *scf, size_t len, |
| 1057 | unsigned long flags) |
| 1058 | { |
Dan Williams | de581b6 | 2009-11-19 17:08:45 -0700 | [diff] [blame] | 1059 | /* specify valid address for disabled result */ |
| 1060 | if (flags & DMA_PREP_PQ_DISABLE_P) |
| 1061 | dst[0] = dst[1]; |
| 1062 | if (flags & DMA_PREP_PQ_DISABLE_Q) |
| 1063 | dst[1] = dst[0]; |
| 1064 | |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 1065 | /* handle the single source multiply case from the raid6 |
| 1066 | * recovery path |
| 1067 | */ |
Dan Williams | de581b6 | 2009-11-19 17:08:45 -0700 | [diff] [blame] | 1068 | if ((flags & DMA_PREP_PQ_DISABLE_P) && src_cnt == 1) { |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 1069 | dma_addr_t single_source[2]; |
| 1070 | unsigned char single_source_coef[2]; |
| 1071 | |
| 1072 | BUG_ON(flags & DMA_PREP_PQ_DISABLE_Q); |
| 1073 | single_source[0] = src[0]; |
| 1074 | single_source[1] = src[0]; |
| 1075 | single_source_coef[0] = scf[0]; |
| 1076 | single_source_coef[1] = 0; |
| 1077 | |
Dan Williams | 21e96c7 | 2013-11-13 10:37:36 -0800 | [diff] [blame] | 1078 | return src_cnt_flags(src_cnt, flags) > 8 ? |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1079 | __ioat3_prep_pq16_lock(chan, NULL, dst, single_source, |
| 1080 | 2, single_source_coef, len, |
| 1081 | flags) : |
| 1082 | __ioat3_prep_pq_lock(chan, NULL, dst, single_source, 2, |
| 1083 | single_source_coef, len, flags); |
| 1084 | |
| 1085 | } else { |
Dan Williams | 21e96c7 | 2013-11-13 10:37:36 -0800 | [diff] [blame] | 1086 | return src_cnt_flags(src_cnt, flags) > 8 ? |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1087 | __ioat3_prep_pq16_lock(chan, NULL, dst, src, src_cnt, |
| 1088 | scf, len, flags) : |
| 1089 | __ioat3_prep_pq_lock(chan, NULL, dst, src, src_cnt, |
| 1090 | scf, len, flags); |
| 1091 | } |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 1092 | } |
| 1093 | |
| 1094 | struct dma_async_tx_descriptor * |
| 1095 | ioat3_prep_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src, |
| 1096 | unsigned int src_cnt, const unsigned char *scf, size_t len, |
| 1097 | enum sum_check_flags *pqres, unsigned long flags) |
| 1098 | { |
Dan Williams | de581b6 | 2009-11-19 17:08:45 -0700 | [diff] [blame] | 1099 | /* specify valid address for disabled result */ |
| 1100 | if (flags & DMA_PREP_PQ_DISABLE_P) |
| 1101 | pq[0] = pq[1]; |
| 1102 | if (flags & DMA_PREP_PQ_DISABLE_Q) |
| 1103 | pq[1] = pq[0]; |
| 1104 | |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 1105 | /* the cleanup routine only sets bits on validate failure, it |
| 1106 | * does not clear bits on validate success... so clear it here |
| 1107 | */ |
| 1108 | *pqres = 0; |
| 1109 | |
Dan Williams | 21e96c7 | 2013-11-13 10:37:36 -0800 | [diff] [blame] | 1110 | return src_cnt_flags(src_cnt, flags) > 8 ? |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1111 | __ioat3_prep_pq16_lock(chan, pqres, pq, src, src_cnt, scf, len, |
| 1112 | flags) : |
| 1113 | __ioat3_prep_pq_lock(chan, pqres, pq, src, src_cnt, scf, len, |
| 1114 | flags); |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 1115 | } |
| 1116 | |
Dan Williams | ae78662 | 2009-09-08 17:43:00 -0700 | [diff] [blame] | 1117 | static struct dma_async_tx_descriptor * |
| 1118 | ioat3_prep_pqxor(struct dma_chan *chan, dma_addr_t dst, dma_addr_t *src, |
| 1119 | unsigned int src_cnt, size_t len, unsigned long flags) |
| 1120 | { |
| 1121 | unsigned char scf[src_cnt]; |
| 1122 | dma_addr_t pq[2]; |
| 1123 | |
| 1124 | memset(scf, 0, src_cnt); |
Dan Williams | ae78662 | 2009-09-08 17:43:00 -0700 | [diff] [blame] | 1125 | pq[0] = dst; |
Dan Williams | de581b6 | 2009-11-19 17:08:45 -0700 | [diff] [blame] | 1126 | flags |= DMA_PREP_PQ_DISABLE_Q; |
| 1127 | pq[1] = dst; /* specify valid address for disabled result */ |
Dan Williams | ae78662 | 2009-09-08 17:43:00 -0700 | [diff] [blame] | 1128 | |
Dan Williams | 21e96c7 | 2013-11-13 10:37:36 -0800 | [diff] [blame] | 1129 | return src_cnt_flags(src_cnt, flags) > 8 ? |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1130 | __ioat3_prep_pq16_lock(chan, NULL, pq, src, src_cnt, scf, len, |
| 1131 | flags) : |
| 1132 | __ioat3_prep_pq_lock(chan, NULL, pq, src, src_cnt, scf, len, |
| 1133 | flags); |
Dan Williams | ae78662 | 2009-09-08 17:43:00 -0700 | [diff] [blame] | 1134 | } |
| 1135 | |
| 1136 | struct dma_async_tx_descriptor * |
| 1137 | ioat3_prep_pqxor_val(struct dma_chan *chan, dma_addr_t *src, |
| 1138 | unsigned int src_cnt, size_t len, |
| 1139 | enum sum_check_flags *result, unsigned long flags) |
| 1140 | { |
| 1141 | unsigned char scf[src_cnt]; |
| 1142 | dma_addr_t pq[2]; |
| 1143 | |
| 1144 | /* the cleanup routine only sets bits on validate failure, it |
| 1145 | * does not clear bits on validate success... so clear it here |
| 1146 | */ |
| 1147 | *result = 0; |
| 1148 | |
| 1149 | memset(scf, 0, src_cnt); |
Dan Williams | ae78662 | 2009-09-08 17:43:00 -0700 | [diff] [blame] | 1150 | pq[0] = src[0]; |
Dan Williams | de581b6 | 2009-11-19 17:08:45 -0700 | [diff] [blame] | 1151 | flags |= DMA_PREP_PQ_DISABLE_Q; |
| 1152 | pq[1] = pq[0]; /* specify valid address for disabled result */ |
Dan Williams | ae78662 | 2009-09-08 17:43:00 -0700 | [diff] [blame] | 1153 | |
Dan Williams | 21e96c7 | 2013-11-13 10:37:36 -0800 | [diff] [blame] | 1154 | return src_cnt_flags(src_cnt, flags) > 8 ? |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1155 | __ioat3_prep_pq16_lock(chan, result, pq, &src[1], src_cnt - 1, |
| 1156 | scf, len, flags) : |
| 1157 | __ioat3_prep_pq_lock(chan, result, pq, &src[1], src_cnt - 1, |
| 1158 | scf, len, flags); |
Dan Williams | ae78662 | 2009-09-08 17:43:00 -0700 | [diff] [blame] | 1159 | } |
| 1160 | |
Dan Williams | 58c8649 | 2009-09-08 17:43:00 -0700 | [diff] [blame] | 1161 | static struct dma_async_tx_descriptor * |
| 1162 | ioat3_prep_interrupt_lock(struct dma_chan *c, unsigned long flags) |
| 1163 | { |
| 1164 | struct ioat2_dma_chan *ioat = to_ioat2_chan(c); |
| 1165 | struct ioat_ring_ent *desc; |
| 1166 | struct ioat_dma_descriptor *hw; |
Dan Williams | 58c8649 | 2009-09-08 17:43:00 -0700 | [diff] [blame] | 1167 | |
Dan Williams | 074cc47 | 2010-05-01 15:22:55 -0700 | [diff] [blame] | 1168 | if (ioat2_check_space_lock(ioat, 1) == 0) |
| 1169 | desc = ioat2_get_ring_ent(ioat, ioat->head); |
Dan Williams | 58c8649 | 2009-09-08 17:43:00 -0700 | [diff] [blame] | 1170 | else |
| 1171 | return NULL; |
| 1172 | |
| 1173 | hw = desc->hw; |
| 1174 | hw->ctl = 0; |
| 1175 | hw->ctl_f.null = 1; |
| 1176 | hw->ctl_f.int_en = 1; |
| 1177 | hw->ctl_f.fence = !!(flags & DMA_PREP_FENCE); |
| 1178 | hw->ctl_f.compl_write = 1; |
| 1179 | hw->size = NULL_DESC_BUFFER_SIZE; |
| 1180 | hw->src_addr = 0; |
| 1181 | hw->dst_addr = 0; |
| 1182 | |
| 1183 | desc->txd.flags = flags; |
| 1184 | desc->len = 1; |
| 1185 | |
| 1186 | dump_desc_dbg(ioat, desc); |
| 1187 | |
| 1188 | /* we leave the channel locked to ensure in order submission */ |
| 1189 | return &desc->txd; |
| 1190 | } |
| 1191 | |
Greg Kroah-Hartman | 4bf27b8 | 2012-12-21 15:09:59 -0800 | [diff] [blame] | 1192 | static void ioat3_dma_test_callback(void *dma_async_param) |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1193 | { |
| 1194 | struct completion *cmp = dma_async_param; |
| 1195 | |
| 1196 | complete(cmp); |
| 1197 | } |
| 1198 | |
| 1199 | #define IOAT_NUM_SRC_TEST 6 /* must be <= 8 */ |
Greg Kroah-Hartman | 4bf27b8 | 2012-12-21 15:09:59 -0800 | [diff] [blame] | 1200 | static int ioat_xor_val_self_test(struct ioatdma_device *device) |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1201 | { |
| 1202 | int i, src_idx; |
| 1203 | struct page *dest; |
| 1204 | struct page *xor_srcs[IOAT_NUM_SRC_TEST]; |
| 1205 | struct page *xor_val_srcs[IOAT_NUM_SRC_TEST + 1]; |
| 1206 | dma_addr_t dma_srcs[IOAT_NUM_SRC_TEST + 1]; |
Bartlomiej Zolnierkiewicz | 48a9db4 | 2013-07-03 15:05:06 -0700 | [diff] [blame] | 1207 | dma_addr_t dest_dma; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1208 | struct dma_async_tx_descriptor *tx; |
| 1209 | struct dma_chan *dma_chan; |
| 1210 | dma_cookie_t cookie; |
| 1211 | u8 cmp_byte = 0; |
| 1212 | u32 cmp_word; |
| 1213 | u32 xor_val_result; |
| 1214 | int err = 0; |
| 1215 | struct completion cmp; |
| 1216 | unsigned long tmo; |
| 1217 | struct device *dev = &device->pdev->dev; |
| 1218 | struct dma_device *dma = &device->common; |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1219 | u8 op = 0; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1220 | |
| 1221 | dev_dbg(dev, "%s\n", __func__); |
| 1222 | |
| 1223 | if (!dma_has_cap(DMA_XOR, dma->cap_mask)) |
| 1224 | return 0; |
| 1225 | |
| 1226 | for (src_idx = 0; src_idx < IOAT_NUM_SRC_TEST; src_idx++) { |
| 1227 | xor_srcs[src_idx] = alloc_page(GFP_KERNEL); |
| 1228 | if (!xor_srcs[src_idx]) { |
| 1229 | while (src_idx--) |
| 1230 | __free_page(xor_srcs[src_idx]); |
| 1231 | return -ENOMEM; |
| 1232 | } |
| 1233 | } |
| 1234 | |
| 1235 | dest = alloc_page(GFP_KERNEL); |
| 1236 | if (!dest) { |
| 1237 | while (src_idx--) |
| 1238 | __free_page(xor_srcs[src_idx]); |
| 1239 | return -ENOMEM; |
| 1240 | } |
| 1241 | |
| 1242 | /* Fill in src buffers */ |
| 1243 | for (src_idx = 0; src_idx < IOAT_NUM_SRC_TEST; src_idx++) { |
| 1244 | u8 *ptr = page_address(xor_srcs[src_idx]); |
| 1245 | for (i = 0; i < PAGE_SIZE; i++) |
| 1246 | ptr[i] = (1 << src_idx); |
| 1247 | } |
| 1248 | |
| 1249 | for (src_idx = 0; src_idx < IOAT_NUM_SRC_TEST; src_idx++) |
| 1250 | cmp_byte ^= (u8) (1 << src_idx); |
| 1251 | |
| 1252 | cmp_word = (cmp_byte << 24) | (cmp_byte << 16) | |
| 1253 | (cmp_byte << 8) | cmp_byte; |
| 1254 | |
| 1255 | memset(page_address(dest), 0, PAGE_SIZE); |
| 1256 | |
| 1257 | dma_chan = container_of(dma->channels.next, struct dma_chan, |
| 1258 | device_node); |
| 1259 | if (dma->device_alloc_chan_resources(dma_chan) < 1) { |
| 1260 | err = -ENODEV; |
| 1261 | goto out; |
| 1262 | } |
| 1263 | |
| 1264 | /* test xor */ |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1265 | op = IOAT_OP_XOR; |
| 1266 | |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1267 | dest_dma = dma_map_page(dev, dest, 0, PAGE_SIZE, DMA_FROM_DEVICE); |
| 1268 | for (i = 0; i < IOAT_NUM_SRC_TEST; i++) |
| 1269 | dma_srcs[i] = dma_map_page(dev, xor_srcs[i], 0, PAGE_SIZE, |
| 1270 | DMA_TO_DEVICE); |
| 1271 | tx = dma->device_prep_dma_xor(dma_chan, dest_dma, dma_srcs, |
| 1272 | IOAT_NUM_SRC_TEST, PAGE_SIZE, |
Bartlomiej Zolnierkiewicz | 0776ae7 | 2013-10-18 19:35:33 +0200 | [diff] [blame] | 1273 | DMA_PREP_INTERRUPT); |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1274 | |
| 1275 | if (!tx) { |
| 1276 | dev_err(dev, "Self-test xor prep failed\n"); |
| 1277 | err = -ENODEV; |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1278 | goto dma_unmap; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1279 | } |
| 1280 | |
| 1281 | async_tx_ack(tx); |
| 1282 | init_completion(&cmp); |
| 1283 | tx->callback = ioat3_dma_test_callback; |
| 1284 | tx->callback_param = &cmp; |
| 1285 | cookie = tx->tx_submit(tx); |
| 1286 | if (cookie < 0) { |
| 1287 | dev_err(dev, "Self-test xor setup failed\n"); |
| 1288 | err = -ENODEV; |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1289 | goto dma_unmap; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1290 | } |
| 1291 | dma->device_issue_pending(dma_chan); |
| 1292 | |
| 1293 | tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000)); |
| 1294 | |
Vinod Koul | 2f16f80 | 2013-10-16 20:48:52 +0530 | [diff] [blame] | 1295 | if (dma->device_tx_status(dma_chan, cookie, NULL) != DMA_COMPLETE) { |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1296 | dev_err(dev, "Self-test xor timed out\n"); |
| 1297 | err = -ENODEV; |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1298 | goto dma_unmap; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1299 | } |
| 1300 | |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1301 | dma_unmap_page(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE); |
| 1302 | for (i = 0; i < IOAT_NUM_SRC_TEST; i++) |
| 1303 | dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, DMA_TO_DEVICE); |
| 1304 | |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1305 | dma_sync_single_for_cpu(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE); |
| 1306 | for (i = 0; i < (PAGE_SIZE / sizeof(u32)); i++) { |
| 1307 | u32 *ptr = page_address(dest); |
| 1308 | if (ptr[i] != cmp_word) { |
| 1309 | dev_err(dev, "Self-test xor failed compare\n"); |
| 1310 | err = -ENODEV; |
| 1311 | goto free_resources; |
| 1312 | } |
| 1313 | } |
Shuah Khan | ac49898 | 2012-10-25 10:22:32 -0600 | [diff] [blame] | 1314 | dma_sync_single_for_device(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE); |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1315 | |
| 1316 | /* skip validate if the capability is not present */ |
| 1317 | if (!dma_has_cap(DMA_XOR_VAL, dma_chan->device->cap_mask)) |
| 1318 | goto free_resources; |
| 1319 | |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1320 | op = IOAT_OP_XOR_VAL; |
| 1321 | |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1322 | /* validate the sources with the destintation page */ |
| 1323 | for (i = 0; i < IOAT_NUM_SRC_TEST; i++) |
| 1324 | xor_val_srcs[i] = xor_srcs[i]; |
| 1325 | xor_val_srcs[i] = dest; |
| 1326 | |
| 1327 | xor_val_result = 1; |
| 1328 | |
| 1329 | for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) |
| 1330 | dma_srcs[i] = dma_map_page(dev, xor_val_srcs[i], 0, PAGE_SIZE, |
| 1331 | DMA_TO_DEVICE); |
| 1332 | tx = dma->device_prep_dma_xor_val(dma_chan, dma_srcs, |
| 1333 | IOAT_NUM_SRC_TEST + 1, PAGE_SIZE, |
Bartlomiej Zolnierkiewicz | 0776ae7 | 2013-10-18 19:35:33 +0200 | [diff] [blame] | 1334 | &xor_val_result, DMA_PREP_INTERRUPT); |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1335 | if (!tx) { |
| 1336 | dev_err(dev, "Self-test zero prep failed\n"); |
| 1337 | err = -ENODEV; |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1338 | goto dma_unmap; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1339 | } |
| 1340 | |
| 1341 | async_tx_ack(tx); |
| 1342 | init_completion(&cmp); |
| 1343 | tx->callback = ioat3_dma_test_callback; |
| 1344 | tx->callback_param = &cmp; |
| 1345 | cookie = tx->tx_submit(tx); |
| 1346 | if (cookie < 0) { |
| 1347 | dev_err(dev, "Self-test zero setup failed\n"); |
| 1348 | err = -ENODEV; |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1349 | goto dma_unmap; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1350 | } |
| 1351 | dma->device_issue_pending(dma_chan); |
| 1352 | |
| 1353 | tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000)); |
| 1354 | |
Vinod Koul | 2f16f80 | 2013-10-16 20:48:52 +0530 | [diff] [blame] | 1355 | if (dma->device_tx_status(dma_chan, cookie, NULL) != DMA_COMPLETE) { |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1356 | dev_err(dev, "Self-test validate timed out\n"); |
| 1357 | err = -ENODEV; |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1358 | goto dma_unmap; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1359 | } |
| 1360 | |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1361 | for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) |
| 1362 | dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, DMA_TO_DEVICE); |
| 1363 | |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1364 | if (xor_val_result != 0) { |
| 1365 | dev_err(dev, "Self-test validate failed compare\n"); |
| 1366 | err = -ENODEV; |
| 1367 | goto free_resources; |
| 1368 | } |
| 1369 | |
Dave Jiang | ac7d631 | 2013-11-06 08:50:09 -0700 | [diff] [blame] | 1370 | memset(page_address(dest), 0, PAGE_SIZE); |
| 1371 | |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1372 | /* test for non-zero parity sum */ |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1373 | op = IOAT_OP_XOR_VAL; |
| 1374 | |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1375 | xor_val_result = 0; |
| 1376 | for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) |
| 1377 | dma_srcs[i] = dma_map_page(dev, xor_val_srcs[i], 0, PAGE_SIZE, |
| 1378 | DMA_TO_DEVICE); |
| 1379 | tx = dma->device_prep_dma_xor_val(dma_chan, dma_srcs, |
| 1380 | IOAT_NUM_SRC_TEST + 1, PAGE_SIZE, |
Bartlomiej Zolnierkiewicz | 0776ae7 | 2013-10-18 19:35:33 +0200 | [diff] [blame] | 1381 | &xor_val_result, DMA_PREP_INTERRUPT); |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1382 | if (!tx) { |
| 1383 | dev_err(dev, "Self-test 2nd zero prep failed\n"); |
| 1384 | err = -ENODEV; |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1385 | goto dma_unmap; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1386 | } |
| 1387 | |
| 1388 | async_tx_ack(tx); |
| 1389 | init_completion(&cmp); |
| 1390 | tx->callback = ioat3_dma_test_callback; |
| 1391 | tx->callback_param = &cmp; |
| 1392 | cookie = tx->tx_submit(tx); |
| 1393 | if (cookie < 0) { |
| 1394 | dev_err(dev, "Self-test 2nd zero setup failed\n"); |
| 1395 | err = -ENODEV; |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1396 | goto dma_unmap; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1397 | } |
| 1398 | dma->device_issue_pending(dma_chan); |
| 1399 | |
| 1400 | tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000)); |
| 1401 | |
Vinod Koul | 2f16f80 | 2013-10-16 20:48:52 +0530 | [diff] [blame] | 1402 | if (dma->device_tx_status(dma_chan, cookie, NULL) != DMA_COMPLETE) { |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1403 | dev_err(dev, "Self-test 2nd validate timed out\n"); |
| 1404 | err = -ENODEV; |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1405 | goto dma_unmap; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1406 | } |
| 1407 | |
| 1408 | if (xor_val_result != SUM_CHECK_P_RESULT) { |
| 1409 | dev_err(dev, "Self-test validate failed compare\n"); |
| 1410 | err = -ENODEV; |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1411 | goto dma_unmap; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1412 | } |
| 1413 | |
Bartlomiej Zolnierkiewicz | 7369f56 | 2012-11-05 10:00:19 +0000 | [diff] [blame] | 1414 | for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) |
| 1415 | dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, DMA_TO_DEVICE); |
| 1416 | |
| 1417 | goto free_resources; |
| 1418 | dma_unmap: |
| 1419 | if (op == IOAT_OP_XOR) { |
| 1420 | dma_unmap_page(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE); |
| 1421 | for (i = 0; i < IOAT_NUM_SRC_TEST; i++) |
| 1422 | dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, |
| 1423 | DMA_TO_DEVICE); |
| 1424 | } else if (op == IOAT_OP_XOR_VAL) { |
| 1425 | for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) |
| 1426 | dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, |
| 1427 | DMA_TO_DEVICE); |
Bartlomiej Zolnierkiewicz | 48a9db4 | 2013-07-03 15:05:06 -0700 | [diff] [blame] | 1428 | } |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1429 | free_resources: |
| 1430 | dma->device_free_chan_resources(dma_chan); |
| 1431 | out: |
| 1432 | src_idx = IOAT_NUM_SRC_TEST; |
| 1433 | while (src_idx--) |
| 1434 | __free_page(xor_srcs[src_idx]); |
| 1435 | __free_page(dest); |
| 1436 | return err; |
| 1437 | } |
| 1438 | |
Greg Kroah-Hartman | 4bf27b8 | 2012-12-21 15:09:59 -0800 | [diff] [blame] | 1439 | static int ioat3_dma_self_test(struct ioatdma_device *device) |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1440 | { |
| 1441 | int rc = ioat_dma_self_test(device); |
| 1442 | |
| 1443 | if (rc) |
| 1444 | return rc; |
| 1445 | |
| 1446 | rc = ioat_xor_val_self_test(device); |
| 1447 | if (rc) |
| 1448 | return rc; |
| 1449 | |
| 1450 | return 0; |
| 1451 | } |
| 1452 | |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1453 | static int ioat3_irq_reinit(struct ioatdma_device *device) |
| 1454 | { |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1455 | struct pci_dev *pdev = device->pdev; |
Dan Williams | 779e561 | 2013-11-13 16:30:43 -0800 | [diff] [blame] | 1456 | int irq = pdev->irq, i; |
| 1457 | |
| 1458 | if (!is_bwd_ioat(pdev)) |
| 1459 | return 0; |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1460 | |
| 1461 | switch (device->irq_mode) { |
| 1462 | case IOAT_MSIX: |
Dan Williams | 779e561 | 2013-11-13 16:30:43 -0800 | [diff] [blame] | 1463 | for (i = 0; i < device->common.chancnt; i++) { |
| 1464 | struct msix_entry *msix = &device->msix_entries[i]; |
| 1465 | struct ioat_chan_common *chan; |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1466 | |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1467 | chan = ioat_chan_by_index(device, i); |
| 1468 | devm_free_irq(&pdev->dev, msix->vector, chan); |
| 1469 | } |
| 1470 | |
| 1471 | pci_disable_msix(pdev); |
| 1472 | break; |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1473 | case IOAT_MSI: |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1474 | pci_disable_msi(pdev); |
Dan Williams | 779e561 | 2013-11-13 16:30:43 -0800 | [diff] [blame] | 1475 | /* fall through */ |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1476 | case IOAT_INTX: |
Dan Williams | 779e561 | 2013-11-13 16:30:43 -0800 | [diff] [blame] | 1477 | devm_free_irq(&pdev->dev, irq, device); |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1478 | break; |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1479 | default: |
| 1480 | return 0; |
| 1481 | } |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1482 | device->irq_mode = IOAT_NOIRQ; |
| 1483 | |
Dan Williams | 779e561 | 2013-11-13 16:30:43 -0800 | [diff] [blame] | 1484 | return ioat_dma_setup_interrupts(device); |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1485 | } |
| 1486 | |
Dan Williams | a6d52d7 | 2009-12-19 15:36:02 -0700 | [diff] [blame] | 1487 | static int ioat3_reset_hw(struct ioat_chan_common *chan) |
| 1488 | { |
| 1489 | /* throw away whatever the channel was doing and get it |
| 1490 | * initialized, with ioat3 specific workarounds |
| 1491 | */ |
| 1492 | struct ioatdma_device *device = chan->device; |
| 1493 | struct pci_dev *pdev = device->pdev; |
| 1494 | u32 chanerr; |
| 1495 | u16 dev_id; |
| 1496 | int err; |
| 1497 | |
| 1498 | ioat2_quiesce(chan, msecs_to_jiffies(100)); |
| 1499 | |
| 1500 | chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET); |
| 1501 | writel(chanerr, chan->reg_base + IOAT_CHANERR_OFFSET); |
| 1502 | |
Dave Jiang | 6ead7e4 | 2013-03-26 15:42:59 -0700 | [diff] [blame] | 1503 | if (device->version < IOAT_VER_3_3) { |
| 1504 | /* clear any pending errors */ |
| 1505 | err = pci_read_config_dword(pdev, |
| 1506 | IOAT_PCI_CHANERR_INT_OFFSET, &chanerr); |
| 1507 | if (err) { |
| 1508 | dev_err(&pdev->dev, |
| 1509 | "channel error register unreachable\n"); |
| 1510 | return err; |
| 1511 | } |
| 1512 | pci_write_config_dword(pdev, |
| 1513 | IOAT_PCI_CHANERR_INT_OFFSET, chanerr); |
Dan Williams | a6d52d7 | 2009-12-19 15:36:02 -0700 | [diff] [blame] | 1514 | |
Dave Jiang | 6ead7e4 | 2013-03-26 15:42:59 -0700 | [diff] [blame] | 1515 | /* Clear DMAUNCERRSTS Cfg-Reg Parity Error status bit |
| 1516 | * (workaround for spurious config parity error after restart) |
| 1517 | */ |
| 1518 | pci_read_config_word(pdev, IOAT_PCI_DEVICE_ID_OFFSET, &dev_id); |
| 1519 | if (dev_id == PCI_DEVICE_ID_INTEL_IOAT_TBG0) { |
| 1520 | pci_write_config_dword(pdev, |
| 1521 | IOAT_PCI_DMAUNCERRSTS_OFFSET, |
| 1522 | 0x10); |
| 1523 | } |
| 1524 | } |
Dan Williams | a6d52d7 | 2009-12-19 15:36:02 -0700 | [diff] [blame] | 1525 | |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1526 | err = ioat2_reset_sync(chan, msecs_to_jiffies(200)); |
Dan Williams | 779e561 | 2013-11-13 16:30:43 -0800 | [diff] [blame] | 1527 | if (!err) |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1528 | err = ioat3_irq_reinit(device); |
Dave Jiang | 1a36306 | 2012-12-03 16:08:37 -0700 | [diff] [blame] | 1529 | |
Dan Williams | 779e561 | 2013-11-13 16:30:43 -0800 | [diff] [blame] | 1530 | if (err) |
| 1531 | dev_err(&pdev->dev, "Failed to reset: %d\n", err); |
| 1532 | |
Dave Jiang | 8a52b9f | 2013-03-26 15:42:47 -0700 | [diff] [blame] | 1533 | return err; |
Dave Jiang | 570727b | 2013-03-25 14:37:31 -0700 | [diff] [blame] | 1534 | } |
| 1535 | |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 1536 | static void ioat3_intr_quirk(struct ioatdma_device *device) |
| 1537 | { |
| 1538 | struct dma_device *dma; |
| 1539 | struct dma_chan *c; |
| 1540 | struct ioat_chan_common *chan; |
| 1541 | u32 errmask; |
| 1542 | |
| 1543 | dma = &device->common; |
| 1544 | |
| 1545 | /* |
| 1546 | * if we have descriptor write back error status, we mask the |
| 1547 | * error interrupts |
| 1548 | */ |
| 1549 | if (device->cap & IOAT_CAP_DWBES) { |
| 1550 | list_for_each_entry(c, &dma->channels, device_node) { |
| 1551 | chan = to_chan_common(c); |
| 1552 | errmask = readl(chan->reg_base + |
| 1553 | IOAT_CHANERR_MASK_OFFSET); |
| 1554 | errmask |= IOAT_CHANERR_XOR_P_OR_CRC_ERR | |
| 1555 | IOAT_CHANERR_XOR_Q_ERR; |
| 1556 | writel(errmask, chan->reg_base + |
| 1557 | IOAT_CHANERR_MASK_OFFSET); |
| 1558 | } |
| 1559 | } |
| 1560 | } |
| 1561 | |
Greg Kroah-Hartman | 4bf27b8 | 2012-12-21 15:09:59 -0800 | [diff] [blame] | 1562 | int ioat3_dma_probe(struct ioatdma_device *device, int dca) |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 1563 | { |
| 1564 | struct pci_dev *pdev = device->pdev; |
Dan Williams | 228c4f5 | 2009-11-19 17:07:10 -0700 | [diff] [blame] | 1565 | int dca_en = system_has_dca_enabled(pdev); |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 1566 | struct dma_device *dma; |
| 1567 | struct dma_chan *c; |
| 1568 | struct ioat_chan_common *chan; |
Dan Williams | e323271 | 2009-09-08 17:43:02 -0700 | [diff] [blame] | 1569 | bool is_raid_device = false; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 1570 | int err; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 1571 | |
| 1572 | device->enumerate_channels = ioat2_enumerate_channels; |
Dan Williams | a6d52d7 | 2009-12-19 15:36:02 -0700 | [diff] [blame] | 1573 | device->reset_hw = ioat3_reset_hw; |
Dan Williams | 9de6fc7 | 2009-09-08 17:42:58 -0700 | [diff] [blame] | 1574 | device->self_test = ioat3_dma_self_test; |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 1575 | device->intr_quirk = ioat3_intr_quirk; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 1576 | dma = &device->common; |
| 1577 | dma->device_prep_dma_memcpy = ioat2_dma_prep_memcpy_lock; |
| 1578 | dma->device_issue_pending = ioat2_issue_pending; |
| 1579 | dma->device_alloc_chan_resources = ioat2_alloc_chan_resources; |
| 1580 | dma->device_free_chan_resources = ioat2_free_chan_resources; |
Dan Williams | 58c8649 | 2009-09-08 17:43:00 -0700 | [diff] [blame] | 1581 | |
| 1582 | dma_cap_set(DMA_INTERRUPT, dma->cap_mask); |
| 1583 | dma->device_prep_dma_interrupt = ioat3_prep_interrupt_lock; |
| 1584 | |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 1585 | device->cap = readl(device->reg_base + IOAT_DMA_CAP_OFFSET); |
Dan Williams | 228c4f5 | 2009-11-19 17:07:10 -0700 | [diff] [blame] | 1586 | |
Brice Goglin | c4dcf0e | 2013-08-02 21:18:03 +0200 | [diff] [blame] | 1587 | if (is_xeon_cb32(pdev) || is_bwd_noraid(pdev)) |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 1588 | device->cap &= ~(IOAT_CAP_XOR | IOAT_CAP_PQ | IOAT_CAP_RAID16SS); |
Dave Jiang | d302398 | 2013-04-10 16:44:32 -0700 | [diff] [blame] | 1589 | |
Dan Williams | 228c4f5 | 2009-11-19 17:07:10 -0700 | [diff] [blame] | 1590 | /* dca is incompatible with raid operations */ |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 1591 | if (dca_en && (device->cap & (IOAT_CAP_XOR|IOAT_CAP_PQ))) |
| 1592 | device->cap &= ~(IOAT_CAP_XOR|IOAT_CAP_PQ); |
Dan Williams | 228c4f5 | 2009-11-19 17:07:10 -0700 | [diff] [blame] | 1593 | |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 1594 | if (device->cap & IOAT_CAP_XOR) { |
Dan Williams | e323271 | 2009-09-08 17:43:02 -0700 | [diff] [blame] | 1595 | is_raid_device = true; |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 1596 | dma->max_xor = 8; |
Dan Williams | b094ad3 | 2009-09-08 17:42:57 -0700 | [diff] [blame] | 1597 | |
| 1598 | dma_cap_set(DMA_XOR, dma->cap_mask); |
| 1599 | dma->device_prep_dma_xor = ioat3_prep_xor; |
| 1600 | |
| 1601 | dma_cap_set(DMA_XOR_VAL, dma->cap_mask); |
| 1602 | dma->device_prep_dma_xor_val = ioat3_prep_xor_val; |
| 1603 | } |
Dave Jiang | eceec44 | 2013-03-26 15:43:15 -0700 | [diff] [blame] | 1604 | |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 1605 | if (device->cap & IOAT_CAP_PQ) { |
Dan Williams | e323271 | 2009-09-08 17:43:02 -0700 | [diff] [blame] | 1606 | is_raid_device = true; |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1607 | |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 1608 | dma->device_prep_dma_pq = ioat3_prep_pq; |
| 1609 | dma->device_prep_dma_pq_val = ioat3_prep_pq_val; |
| 1610 | dma_cap_set(DMA_PQ, dma->cap_mask); |
| 1611 | dma_cap_set(DMA_PQ_VAL, dma->cap_mask); |
| 1612 | |
| 1613 | if (device->cap & IOAT_CAP_RAID16SS) { |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1614 | dma_set_maxpq(dma, 16, 0); |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1615 | } else { |
| 1616 | dma_set_maxpq(dma, 8, 0); |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1617 | } |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 1618 | |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 1619 | if (!(device->cap & IOAT_CAP_XOR)) { |
| 1620 | dma->device_prep_dma_xor = ioat3_prep_pqxor; |
| 1621 | dma->device_prep_dma_xor_val = ioat3_prep_pqxor_val; |
| 1622 | dma_cap_set(DMA_XOR, dma->cap_mask); |
| 1623 | dma_cap_set(DMA_XOR_VAL, dma->cap_mask); |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 1624 | |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 1625 | if (device->cap & IOAT_CAP_RAID16SS) { |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1626 | dma->max_xor = 16; |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1627 | } else { |
| 1628 | dma->max_xor = 8; |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1629 | } |
Dan Williams | ae78662 | 2009-09-08 17:43:00 -0700 | [diff] [blame] | 1630 | } |
Dan Williams | d69d235b | 2009-09-08 17:42:59 -0700 | [diff] [blame] | 1631 | } |
Dave Jiang | eceec44 | 2013-03-26 15:43:15 -0700 | [diff] [blame] | 1632 | |
Dave Jiang | 9a37f64 | 2013-02-26 09:20:36 -0700 | [diff] [blame] | 1633 | dma->device_tx_status = ioat3_tx_status; |
| 1634 | device->cleanup_fn = ioat3_cleanup_event; |
| 1635 | device->timer_fn = ioat3_timer_event; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 1636 | |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1637 | /* starting with CB3.3 super extended descriptors are supported */ |
Dave Jiang | 75c6f0a | 2013-04-10 16:44:39 -0700 | [diff] [blame] | 1638 | if (device->cap & IOAT_CAP_RAID16SS) { |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1639 | char pool_name[14]; |
| 1640 | int i; |
| 1641 | |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1642 | for (i = 0; i < MAX_SED_POOLS; i++) { |
| 1643 | snprintf(pool_name, 14, "ioat_hw%d_sed", i); |
| 1644 | |
| 1645 | /* allocate SED DMA pool */ |
Dan Williams | 59056e8 | 2013-11-13 10:57:18 -0800 | [diff] [blame] | 1646 | device->sed_hw_pool[i] = dmam_pool_create(pool_name, |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1647 | &pdev->dev, |
| 1648 | SED_SIZE * (i + 1), 64, 0); |
| 1649 | if (!device->sed_hw_pool[i]) |
Dan Williams | 59056e8 | 2013-11-13 10:57:18 -0800 | [diff] [blame] | 1650 | return -ENOMEM; |
Dave Jiang | 7727eaa | 2013-04-15 10:25:56 -0700 | [diff] [blame] | 1651 | |
| 1652 | } |
| 1653 | } |
| 1654 | |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 1655 | err = ioat_probe(device); |
| 1656 | if (err) |
| 1657 | return err; |
| 1658 | ioat_set_tcp_copy_break(262144); |
| 1659 | |
| 1660 | list_for_each_entry(c, &dma->channels, device_node) { |
| 1661 | chan = to_chan_common(c); |
| 1662 | writel(IOAT_DMA_DCA_ANY_CPU, |
| 1663 | chan->reg_base + IOAT_DCACTRL_OFFSET); |
| 1664 | } |
| 1665 | |
| 1666 | err = ioat_register(device); |
| 1667 | if (err) |
| 1668 | return err; |
Dan Williams | 5669e31 | 2009-09-08 17:42:56 -0700 | [diff] [blame] | 1669 | |
| 1670 | ioat_kobject_add(device, &ioat2_ktype); |
| 1671 | |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 1672 | if (dca) |
| 1673 | device->dca = ioat3_dca_init(pdev, device->reg_base); |
| 1674 | |
| 1675 | return 0; |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 1676 | } |