Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/ide/ide-dma.c Version 4.10 June 9, 2000 |
| 3 | * |
| 4 | * Copyright (c) 1999-2000 Andre Hedrick <andre@linux-ide.org> |
| 5 | * May be copied or modified under the terms of the GNU General Public License |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * Special Thanks to Mark for his Six years of work. |
| 10 | * |
| 11 | * Copyright (c) 1995-1998 Mark Lord |
| 12 | * May be copied or modified under the terms of the GNU General Public License |
| 13 | */ |
| 14 | |
| 15 | /* |
| 16 | * This module provides support for the bus-master IDE DMA functions |
| 17 | * of various PCI chipsets, including the Intel PIIX (i82371FB for |
| 18 | * the 430 FX chipset), the PIIX3 (i82371SB for the 430 HX/VX and |
| 19 | * 440 chipsets), and the PIIX4 (i82371AB for the 430 TX chipset) |
| 20 | * ("PIIX" stands for "PCI ISA IDE Xcellerator"). |
| 21 | * |
| 22 | * Pretty much the same code works for other IDE PCI bus-mastering chipsets. |
| 23 | * |
| 24 | * DMA is supported for all IDE devices (disk drives, cdroms, tapes, floppies). |
| 25 | * |
| 26 | * By default, DMA support is prepared for use, but is currently enabled only |
| 27 | * for drives which already have DMA enabled (UltraDMA or mode 2 multi/single), |
| 28 | * or which are recognized as "good" (see table below). Drives with only mode0 |
| 29 | * or mode1 (multi/single) DMA should also work with this chipset/driver |
| 30 | * (eg. MC2112A) but are not enabled by default. |
| 31 | * |
| 32 | * Use "hdparm -i" to view modes supported by a given drive. |
| 33 | * |
| 34 | * The hdparm-3.5 (or later) utility can be used for manually enabling/disabling |
| 35 | * DMA support, but must be (re-)compiled against this kernel version or later. |
| 36 | * |
| 37 | * To enable DMA, use "hdparm -d1 /dev/hd?" on a per-drive basis after booting. |
| 38 | * If problems arise, ide.c will disable DMA operation after a few retries. |
| 39 | * This error recovery mechanism works and has been extremely well exercised. |
| 40 | * |
| 41 | * IDE drives, depending on their vintage, may support several different modes |
| 42 | * of DMA operation. The boot-time modes are indicated with a "*" in |
| 43 | * the "hdparm -i" listing, and can be changed with *knowledgeable* use of |
| 44 | * the "hdparm -X" feature. There is seldom a need to do this, as drives |
| 45 | * normally power-up with their "best" PIO/DMA modes enabled. |
| 46 | * |
| 47 | * Testing has been done with a rather extensive number of drives, |
| 48 | * with Quantum & Western Digital models generally outperforming the pack, |
| 49 | * and Fujitsu & Conner (and some Seagate which are really Conner) drives |
| 50 | * showing more lackluster throughput. |
| 51 | * |
| 52 | * Keep an eye on /var/adm/messages for "DMA disabled" messages. |
| 53 | * |
| 54 | * Some people have reported trouble with Intel Zappa motherboards. |
| 55 | * This can be fixed by upgrading the AMI BIOS to version 1.00.04.BS0, |
| 56 | * available from ftp://ftp.intel.com/pub/bios/10004bs0.exe |
| 57 | * (thanks to Glen Morrell <glen@spin.Stanford.edu> for researching this). |
| 58 | * |
| 59 | * Thanks to "Christopher J. Reimer" <reimer@doe.carleton.ca> for |
| 60 | * fixing the problem with the BIOS on some Acer motherboards. |
| 61 | * |
| 62 | * Thanks to "Benoit Poulot-Cazajous" <poulot@chorus.fr> for testing |
| 63 | * "TX" chipset compatibility and for providing patches for the "TX" chipset. |
| 64 | * |
| 65 | * Thanks to Christian Brunner <chb@muc.de> for taking a good first crack |
| 66 | * at generic DMA -- his patches were referred to when preparing this code. |
| 67 | * |
| 68 | * Most importantly, thanks to Robert Bringman <rob@mars.trion.com> |
| 69 | * for supplying a Promise UDMA board & WD UDMA drive for this work! |
| 70 | * |
| 71 | * And, yes, Intel Zappa boards really *do* use both PIIX IDE ports. |
| 72 | * |
| 73 | * ATA-66/100 and recovery functions, I forgot the rest...... |
| 74 | * |
| 75 | */ |
| 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | #include <linux/module.h> |
| 78 | #include <linux/types.h> |
| 79 | #include <linux/kernel.h> |
| 80 | #include <linux/timer.h> |
| 81 | #include <linux/mm.h> |
| 82 | #include <linux/interrupt.h> |
| 83 | #include <linux/pci.h> |
| 84 | #include <linux/init.h> |
| 85 | #include <linux/ide.h> |
| 86 | #include <linux/delay.h> |
| 87 | #include <linux/scatterlist.h> |
| 88 | |
| 89 | #include <asm/io.h> |
| 90 | #include <asm/irq.h> |
| 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | static const struct drive_list_entry drive_whitelist [] = { |
| 93 | |
Junio C Hamano | c2d3ce8 | 2007-07-09 23:17:56 +0200 | [diff] [blame] | 94 | { "Micropolis 2112A" , NULL }, |
| 95 | { "CONNER CTMA 4000" , NULL }, |
| 96 | { "CONNER CTT8000-A" , NULL }, |
| 97 | { "ST34342A" , NULL }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | { NULL , NULL } |
| 99 | }; |
| 100 | |
| 101 | static const struct drive_list_entry drive_blacklist [] = { |
| 102 | |
Junio C Hamano | c2d3ce8 | 2007-07-09 23:17:56 +0200 | [diff] [blame] | 103 | { "WDC AC11000H" , NULL }, |
| 104 | { "WDC AC22100H" , NULL }, |
| 105 | { "WDC AC32500H" , NULL }, |
| 106 | { "WDC AC33100H" , NULL }, |
| 107 | { "WDC AC31600H" , NULL }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | { "WDC AC32100H" , "24.09P07" }, |
| 109 | { "WDC AC23200L" , "21.10N21" }, |
Junio C Hamano | c2d3ce8 | 2007-07-09 23:17:56 +0200 | [diff] [blame] | 110 | { "Compaq CRD-8241B" , NULL }, |
| 111 | { "CRD-8400B" , NULL }, |
| 112 | { "CRD-8480B", NULL }, |
| 113 | { "CRD-8482B", NULL }, |
| 114 | { "CRD-84" , NULL }, |
| 115 | { "SanDisk SDP3B" , NULL }, |
| 116 | { "SanDisk SDP3B-64" , NULL }, |
| 117 | { "SANYO CD-ROM CRD" , NULL }, |
| 118 | { "HITACHI CDR-8" , NULL }, |
| 119 | { "HITACHI CDR-8335" , NULL }, |
| 120 | { "HITACHI CDR-8435" , NULL }, |
| 121 | { "Toshiba CD-ROM XM-6202B" , NULL }, |
| 122 | { "TOSHIBA CD-ROM XM-1702BC", NULL }, |
| 123 | { "CD-532E-A" , NULL }, |
| 124 | { "E-IDE CD-ROM CR-840", NULL }, |
| 125 | { "CD-ROM Drive/F5A", NULL }, |
| 126 | { "WPI CDD-820", NULL }, |
| 127 | { "SAMSUNG CD-ROM SC-148C", NULL }, |
| 128 | { "SAMSUNG CD-ROM SC", NULL }, |
| 129 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM", NULL }, |
| 130 | { "_NEC DV5800A", NULL }, |
Junio C Hamano | 5a6248c | 2007-05-24 02:42:38 +0200 | [diff] [blame] | 131 | { "SAMSUNG CD-ROM SN-124", "N001" }, |
Junio C Hamano | c2d3ce8 | 2007-07-09 23:17:56 +0200 | [diff] [blame] | 132 | { "Seagate STT20000A", NULL }, |
Bartlomiej Zolnierkiewicz | b0bc65b | 2007-11-27 21:35:56 +0100 | [diff] [blame] | 133 | { "CD-ROM CDR_U200", "1.09" }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | { NULL , NULL } |
| 135 | |
| 136 | }; |
| 137 | |
| 138 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | * ide_dma_intr - IDE DMA interrupt handler |
| 140 | * @drive: the drive the interrupt is for |
| 141 | * |
| 142 | * Handle an interrupt completing a read/write DMA transfer on an |
| 143 | * IDE device |
| 144 | */ |
| 145 | |
| 146 | ide_startstop_t ide_dma_intr (ide_drive_t *drive) |
| 147 | { |
| 148 | u8 stat = 0, dma_stat = 0; |
| 149 | |
| 150 | dma_stat = HWIF(drive)->ide_dma_end(drive); |
| 151 | stat = HWIF(drive)->INB(IDE_STATUS_REG); /* get drive status */ |
| 152 | if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) { |
| 153 | if (!dma_stat) { |
| 154 | struct request *rq = HWGROUP(drive)->rq; |
| 155 | |
Tejun Heo | 4d7a984 | 2008-01-26 20:13:11 +0100 | [diff] [blame] | 156 | task_end_request(drive, rq, stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | return ide_stopped; |
| 158 | } |
| 159 | printk(KERN_ERR "%s: dma_intr: bad DMA status (dma_stat=%x)\n", |
| 160 | drive->name, dma_stat); |
| 161 | } |
| 162 | return ide_error(drive, "dma_intr", stat); |
| 163 | } |
| 164 | |
| 165 | EXPORT_SYMBOL_GPL(ide_dma_intr); |
| 166 | |
Bartlomiej Zolnierkiewicz | 75d7d96 | 2007-10-13 17:47:50 +0200 | [diff] [blame] | 167 | static int ide_dma_good_drive(ide_drive_t *drive) |
| 168 | { |
| 169 | return ide_in_drive_list(drive->id, drive_whitelist); |
| 170 | } |
| 171 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | #ifdef CONFIG_BLK_DEV_IDEDMA_PCI |
| 173 | /** |
| 174 | * ide_build_sglist - map IDE scatter gather for DMA I/O |
| 175 | * @drive: the drive to build the DMA table for |
| 176 | * @rq: the request holding the sg list |
| 177 | * |
| 178 | * Perform the PCI mapping magic necessary to access the source or |
| 179 | * target buffers of a request via PCI DMA. The lower layers of the |
| 180 | * kernel provide the necessary cache management so that we can |
| 181 | * operate in a portable fashion |
| 182 | */ |
| 183 | |
| 184 | int ide_build_sglist(ide_drive_t *drive, struct request *rq) |
| 185 | { |
| 186 | ide_hwif_t *hwif = HWIF(drive); |
| 187 | struct scatterlist *sg = hwif->sg_table; |
| 188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | ide_map_sg(drive, rq); |
| 190 | |
| 191 | if (rq_data_dir(rq) == READ) |
| 192 | hwif->sg_dma_direction = PCI_DMA_FROMDEVICE; |
| 193 | else |
| 194 | hwif->sg_dma_direction = PCI_DMA_TODEVICE; |
| 195 | |
| 196 | return pci_map_sg(hwif->pci_dev, sg, hwif->sg_nents, hwif->sg_dma_direction); |
| 197 | } |
| 198 | |
| 199 | EXPORT_SYMBOL_GPL(ide_build_sglist); |
| 200 | |
| 201 | /** |
| 202 | * ide_build_dmatable - build IDE DMA table |
| 203 | * |
| 204 | * ide_build_dmatable() prepares a dma request. We map the command |
| 205 | * to get the pci bus addresses of the buffers and then build up |
| 206 | * the PRD table that the IDE layer wants to be fed. The code |
| 207 | * knows about the 64K wrap bug in the CS5530. |
| 208 | * |
| 209 | * Returns the number of built PRD entries if all went okay, |
| 210 | * returns 0 otherwise. |
| 211 | * |
| 212 | * May also be invoked from trm290.c |
| 213 | */ |
| 214 | |
| 215 | int ide_build_dmatable (ide_drive_t *drive, struct request *rq) |
| 216 | { |
| 217 | ide_hwif_t *hwif = HWIF(drive); |
| 218 | unsigned int *table = hwif->dmatable_cpu; |
| 219 | unsigned int is_trm290 = (hwif->chipset == ide_trm290) ? 1 : 0; |
| 220 | unsigned int count = 0; |
| 221 | int i; |
| 222 | struct scatterlist *sg; |
| 223 | |
| 224 | hwif->sg_nents = i = ide_build_sglist(drive, rq); |
| 225 | |
| 226 | if (!i) |
| 227 | return 0; |
| 228 | |
| 229 | sg = hwif->sg_table; |
| 230 | while (i) { |
| 231 | u32 cur_addr; |
| 232 | u32 cur_len; |
| 233 | |
| 234 | cur_addr = sg_dma_address(sg); |
| 235 | cur_len = sg_dma_len(sg); |
| 236 | |
| 237 | /* |
| 238 | * Fill in the dma table, without crossing any 64kB boundaries. |
| 239 | * Most hardware requires 16-bit alignment of all blocks, |
| 240 | * but the trm290 requires 32-bit alignment. |
| 241 | */ |
| 242 | |
| 243 | while (cur_len) { |
| 244 | if (count++ >= PRD_ENTRIES) { |
| 245 | printk(KERN_ERR "%s: DMA table too small\n", drive->name); |
| 246 | goto use_pio_instead; |
| 247 | } else { |
| 248 | u32 xcount, bcount = 0x10000 - (cur_addr & 0xffff); |
| 249 | |
| 250 | if (bcount > cur_len) |
| 251 | bcount = cur_len; |
| 252 | *table++ = cpu_to_le32(cur_addr); |
| 253 | xcount = bcount & 0xffff; |
| 254 | if (is_trm290) |
| 255 | xcount = ((xcount >> 2) - 1) << 16; |
| 256 | if (xcount == 0x0000) { |
| 257 | /* |
| 258 | * Most chipsets correctly interpret a length of 0x0000 as 64KB, |
| 259 | * but at least one (e.g. CS5530) misinterprets it as zero (!). |
| 260 | * So here we break the 64KB entry into two 32KB entries instead. |
| 261 | */ |
| 262 | if (count++ >= PRD_ENTRIES) { |
| 263 | printk(KERN_ERR "%s: DMA table too small\n", drive->name); |
| 264 | goto use_pio_instead; |
| 265 | } |
| 266 | *table++ = cpu_to_le32(0x8000); |
| 267 | *table++ = cpu_to_le32(cur_addr + 0x8000); |
| 268 | xcount = 0x8000; |
| 269 | } |
| 270 | *table++ = cpu_to_le32(xcount); |
| 271 | cur_addr += bcount; |
| 272 | cur_len -= bcount; |
| 273 | } |
| 274 | } |
| 275 | |
Jens Axboe | 55c16a7 | 2007-07-25 08:13:56 +0200 | [diff] [blame] | 276 | sg = sg_next(sg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | i--; |
| 278 | } |
| 279 | |
| 280 | if (count) { |
| 281 | if (!is_trm290) |
| 282 | *--table |= cpu_to_le32(0x80000000); |
| 283 | return count; |
| 284 | } |
Bartlomiej Zolnierkiewicz | f6fb786 | 2008-02-01 23:09:31 +0100 | [diff] [blame^] | 285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | printk(KERN_ERR "%s: empty DMA table?\n", drive->name); |
Bartlomiej Zolnierkiewicz | f6fb786 | 2008-02-01 23:09:31 +0100 | [diff] [blame^] | 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | use_pio_instead: |
Bartlomiej Zolnierkiewicz | f6fb786 | 2008-02-01 23:09:31 +0100 | [diff] [blame^] | 289 | ide_destroy_dmatable(drive); |
| 290 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | return 0; /* revert to PIO for this request */ |
| 292 | } |
| 293 | |
| 294 | EXPORT_SYMBOL_GPL(ide_build_dmatable); |
| 295 | |
| 296 | /** |
| 297 | * ide_destroy_dmatable - clean up DMA mapping |
| 298 | * @drive: The drive to unmap |
| 299 | * |
| 300 | * Teardown mappings after DMA has completed. This must be called |
| 301 | * after the completion of each use of ide_build_dmatable and before |
| 302 | * the next use of ide_build_dmatable. Failure to do so will cause |
| 303 | * an oops as only one mapping can be live for each target at a given |
| 304 | * time. |
| 305 | */ |
| 306 | |
| 307 | void ide_destroy_dmatable (ide_drive_t *drive) |
| 308 | { |
| 309 | struct pci_dev *dev = HWIF(drive)->pci_dev; |
| 310 | struct scatterlist *sg = HWIF(drive)->sg_table; |
| 311 | int nents = HWIF(drive)->sg_nents; |
| 312 | |
| 313 | pci_unmap_sg(dev, sg, nents, HWIF(drive)->sg_dma_direction); |
| 314 | } |
| 315 | |
| 316 | EXPORT_SYMBOL_GPL(ide_destroy_dmatable); |
| 317 | |
| 318 | /** |
| 319 | * config_drive_for_dma - attempt to activate IDE DMA |
| 320 | * @drive: the drive to place in DMA mode |
| 321 | * |
| 322 | * If the drive supports at least mode 2 DMA or UDMA of any kind |
| 323 | * then attempt to place it into DMA mode. Drives that are known to |
| 324 | * support DMA but predate the DMA properties or that are known |
| 325 | * to have DMA handling bugs are also set up appropriately based |
| 326 | * on the good/bad drive lists. |
| 327 | */ |
| 328 | |
| 329 | static int config_drive_for_dma (ide_drive_t *drive) |
| 330 | { |
Bartlomiej Zolnierkiewicz | 1116fae | 2007-08-20 22:42:55 +0200 | [diff] [blame] | 331 | ide_hwif_t *hwif = drive->hwif; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | struct hd_driveid *id = drive->id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
Bartlomiej Zolnierkiewicz | 33c1002 | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 334 | if (drive->media != ide_disk) { |
| 335 | if (hwif->host_flags & IDE_HFLAG_NO_ATAPI_DMA) |
Bartlomiej Zolnierkiewicz | bcbf6ee | 2007-11-05 21:42:30 +0100 | [diff] [blame] | 336 | return 0; |
Bartlomiej Zolnierkiewicz | 33c1002 | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 337 | } |
Bartlomiej Zolnierkiewicz | 1116fae | 2007-08-20 22:42:55 +0200 | [diff] [blame] | 338 | |
Bartlomiej Zolnierkiewicz | 0ae2e17 | 2007-10-16 22:29:55 +0200 | [diff] [blame] | 339 | /* |
| 340 | * Enable DMA on any drive that has |
| 341 | * UltraDMA (mode 0/1/2/3/4/5/6) enabled |
| 342 | */ |
| 343 | if ((id->field_valid & 4) && ((id->dma_ultra >> 8) & 0x7f)) |
| 344 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
Bartlomiej Zolnierkiewicz | 0ae2e17 | 2007-10-16 22:29:55 +0200 | [diff] [blame] | 346 | /* |
| 347 | * Enable DMA on any drive that has mode2 DMA |
| 348 | * (multi or single) enabled |
| 349 | */ |
| 350 | if (id->field_valid & 2) /* regular DMA */ |
| 351 | if ((id->dma_mword & 0x404) == 0x404 || |
| 352 | (id->dma_1word & 0x404) == 0x404) |
| 353 | return 1; |
Bartlomiej Zolnierkiewicz | 3608b5d | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 354 | |
Bartlomiej Zolnierkiewicz | 0ae2e17 | 2007-10-16 22:29:55 +0200 | [diff] [blame] | 355 | /* Consult the list of known "good" drives */ |
| 356 | if (ide_dma_good_drive(drive)) |
| 357 | return 1; |
| 358 | |
| 359 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } |
| 361 | |
| 362 | /** |
| 363 | * dma_timer_expiry - handle a DMA timeout |
| 364 | * @drive: Drive that timed out |
| 365 | * |
| 366 | * An IDE DMA transfer timed out. In the event of an error we ask |
| 367 | * the driver to resolve the problem, if a DMA transfer is still |
| 368 | * in progress we continue to wait (arguably we need to add a |
| 369 | * secondary 'I don't care what the drive thinks' timeout here) |
| 370 | * Finally if we have an interrupt we let it complete the I/O. |
| 371 | * But only one time - we clear expiry and if it's still not |
| 372 | * completed after WAIT_CMD, we error and retry in PIO. |
| 373 | * This can occur if an interrupt is lost or due to hang or bugs. |
| 374 | */ |
| 375 | |
| 376 | static int dma_timer_expiry (ide_drive_t *drive) |
| 377 | { |
| 378 | ide_hwif_t *hwif = HWIF(drive); |
| 379 | u8 dma_stat = hwif->INB(hwif->dma_status); |
| 380 | |
| 381 | printk(KERN_WARNING "%s: dma_timer_expiry: dma status == 0x%02x\n", |
| 382 | drive->name, dma_stat); |
| 383 | |
| 384 | if ((dma_stat & 0x18) == 0x18) /* BUSY Stupid Early Timer !! */ |
| 385 | return WAIT_CMD; |
| 386 | |
| 387 | HWGROUP(drive)->expiry = NULL; /* one free ride for now */ |
| 388 | |
| 389 | /* 1 dmaing, 2 error, 4 intr */ |
| 390 | if (dma_stat & 2) /* ERROR */ |
| 391 | return -1; |
| 392 | |
| 393 | if (dma_stat & 1) /* DMAing */ |
| 394 | return WAIT_CMD; |
| 395 | |
| 396 | if (dma_stat & 4) /* Got an Interrupt */ |
| 397 | return WAIT_CMD; |
| 398 | |
| 399 | return 0; /* Status is unknown -- reset the bus */ |
| 400 | } |
| 401 | |
| 402 | /** |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 403 | * ide_dma_host_set - Enable/disable DMA on a host |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | * @drive: drive to control |
| 405 | * |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 406 | * Enable/disable DMA on an IDE controller following generic |
| 407 | * bus-mastering IDE controller behaviour. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | */ |
| 409 | |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 410 | void ide_dma_host_set(ide_drive_t *drive, int on) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | { |
| 412 | ide_hwif_t *hwif = HWIF(drive); |
| 413 | u8 unit = (drive->select.b.unit & 0x01); |
| 414 | u8 dma_stat = hwif->INB(hwif->dma_status); |
| 415 | |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 416 | if (on) |
| 417 | dma_stat |= (1 << (5 + unit)); |
| 418 | else |
| 419 | dma_stat &= ~(1 << (5 + unit)); |
| 420 | |
| 421 | hwif->OUTB(dma_stat, hwif->dma_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
| 423 | |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 424 | EXPORT_SYMBOL_GPL(ide_dma_host_set); |
Bartlomiej Zolnierkiewicz | 4a546e0 | 2008-01-26 20:13:01 +0100 | [diff] [blame] | 425 | #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
| 427 | /** |
Bartlomiej Zolnierkiewicz | 7469aaf | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 428 | * ide_dma_off_quietly - Generic DMA kill |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | * @drive: drive to control |
| 430 | * |
| 431 | * Turn off the current DMA on this IDE controller. |
| 432 | */ |
| 433 | |
Bartlomiej Zolnierkiewicz | 7469aaf | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 434 | void ide_dma_off_quietly(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | { |
| 436 | drive->using_dma = 0; |
| 437 | ide_toggle_bounce(drive, 0); |
| 438 | |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 439 | drive->hwif->dma_host_set(drive, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | } |
| 441 | |
Bartlomiej Zolnierkiewicz | 7469aaf | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 442 | EXPORT_SYMBOL(ide_dma_off_quietly); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
| 444 | /** |
Bartlomiej Zolnierkiewicz | 7469aaf | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 445 | * ide_dma_off - disable DMA on a device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | * @drive: drive to disable DMA on |
| 447 | * |
| 448 | * Disable IDE DMA for a device on this IDE controller. |
| 449 | * Inform the user that DMA has been disabled. |
| 450 | */ |
| 451 | |
Bartlomiej Zolnierkiewicz | 7469aaf | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 452 | void ide_dma_off(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | { |
| 454 | printk(KERN_INFO "%s: DMA disabled\n", drive->name); |
Bartlomiej Zolnierkiewicz | 4a546e0 | 2008-01-26 20:13:01 +0100 | [diff] [blame] | 455 | ide_dma_off_quietly(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | } |
| 457 | |
Bartlomiej Zolnierkiewicz | 7469aaf | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 458 | EXPORT_SYMBOL(ide_dma_off); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | /** |
Bartlomiej Zolnierkiewicz | 4a546e0 | 2008-01-26 20:13:01 +0100 | [diff] [blame] | 461 | * ide_dma_on - Enable DMA on a device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | * @drive: drive to enable DMA on |
| 463 | * |
| 464 | * Enable IDE DMA for a device on this IDE controller. |
| 465 | */ |
Bartlomiej Zolnierkiewicz | 4a546e0 | 2008-01-26 20:13:01 +0100 | [diff] [blame] | 466 | |
| 467 | void ide_dma_on(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | drive->using_dma = 1; |
| 470 | ide_toggle_bounce(drive, 1); |
| 471 | |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 472 | drive->hwif->dma_host_set(drive, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | } |
| 474 | |
Bartlomiej Zolnierkiewicz | 4a546e0 | 2008-01-26 20:13:01 +0100 | [diff] [blame] | 475 | #ifdef CONFIG_BLK_DEV_IDEDMA_PCI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | * ide_dma_setup - begin a DMA phase |
| 478 | * @drive: target device |
| 479 | * |
| 480 | * Build an IDE DMA PRD (IDE speak for scatter gather table) |
| 481 | * and then set up the DMA transfer registers for a device |
| 482 | * that follows generic IDE PCI DMA behaviour. Controllers can |
| 483 | * override this function if they need to |
| 484 | * |
| 485 | * Returns 0 on success. If a PIO fallback is required then 1 |
| 486 | * is returned. |
| 487 | */ |
| 488 | |
| 489 | int ide_dma_setup(ide_drive_t *drive) |
| 490 | { |
| 491 | ide_hwif_t *hwif = drive->hwif; |
| 492 | struct request *rq = HWGROUP(drive)->rq; |
| 493 | unsigned int reading; |
| 494 | u8 dma_stat; |
| 495 | |
| 496 | if (rq_data_dir(rq)) |
| 497 | reading = 0; |
| 498 | else |
| 499 | reading = 1 << 3; |
| 500 | |
| 501 | /* fall back to pio! */ |
| 502 | if (!ide_build_dmatable(drive, rq)) { |
| 503 | ide_map_sg(drive, rq); |
| 504 | return 1; |
| 505 | } |
| 506 | |
| 507 | /* PRD table */ |
Bartlomiej Zolnierkiewicz | 2ad1e55 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 508 | if (hwif->mmio) |
Bartlomiej Zolnierkiewicz | 0ecdca2 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 509 | writel(hwif->dmatable_dma, (void __iomem *)hwif->dma_prdtable); |
| 510 | else |
| 511 | outl(hwif->dmatable_dma, hwif->dma_prdtable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
| 513 | /* specify r/w */ |
| 514 | hwif->OUTB(reading, hwif->dma_command); |
| 515 | |
| 516 | /* read dma_status for INTR & ERROR flags */ |
| 517 | dma_stat = hwif->INB(hwif->dma_status); |
| 518 | |
| 519 | /* clear INTR & ERROR flags */ |
| 520 | hwif->OUTB(dma_stat|6, hwif->dma_status); |
| 521 | drive->waiting_for_dma = 1; |
| 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | EXPORT_SYMBOL_GPL(ide_dma_setup); |
| 526 | |
| 527 | static void ide_dma_exec_cmd(ide_drive_t *drive, u8 command) |
| 528 | { |
| 529 | /* issue cmd to drive */ |
| 530 | ide_execute_command(drive, command, &ide_dma_intr, 2*WAIT_CMD, dma_timer_expiry); |
| 531 | } |
| 532 | |
| 533 | void ide_dma_start(ide_drive_t *drive) |
| 534 | { |
| 535 | ide_hwif_t *hwif = HWIF(drive); |
| 536 | u8 dma_cmd = hwif->INB(hwif->dma_command); |
| 537 | |
| 538 | /* Note that this is done *after* the cmd has |
| 539 | * been issued to the drive, as per the BM-IDE spec. |
| 540 | * The Promise Ultra33 doesn't work correctly when |
| 541 | * we do this part before issuing the drive cmd. |
| 542 | */ |
| 543 | /* start DMA */ |
| 544 | hwif->OUTB(dma_cmd|1, hwif->dma_command); |
| 545 | hwif->dma = 1; |
| 546 | wmb(); |
| 547 | } |
| 548 | |
| 549 | EXPORT_SYMBOL_GPL(ide_dma_start); |
| 550 | |
| 551 | /* returns 1 on error, 0 otherwise */ |
| 552 | int __ide_dma_end (ide_drive_t *drive) |
| 553 | { |
| 554 | ide_hwif_t *hwif = HWIF(drive); |
| 555 | u8 dma_stat = 0, dma_cmd = 0; |
| 556 | |
| 557 | drive->waiting_for_dma = 0; |
| 558 | /* get dma_command mode */ |
| 559 | dma_cmd = hwif->INB(hwif->dma_command); |
| 560 | /* stop DMA */ |
| 561 | hwif->OUTB(dma_cmd&~1, hwif->dma_command); |
| 562 | /* get DMA status */ |
| 563 | dma_stat = hwif->INB(hwif->dma_status); |
| 564 | /* clear the INTR & ERROR bits */ |
| 565 | hwif->OUTB(dma_stat|6, hwif->dma_status); |
| 566 | /* purge DMA mappings */ |
| 567 | ide_destroy_dmatable(drive); |
| 568 | /* verify good DMA status */ |
| 569 | hwif->dma = 0; |
| 570 | wmb(); |
| 571 | return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0; |
| 572 | } |
| 573 | |
| 574 | EXPORT_SYMBOL(__ide_dma_end); |
| 575 | |
| 576 | /* returns 1 if dma irq issued, 0 otherwise */ |
| 577 | static int __ide_dma_test_irq(ide_drive_t *drive) |
| 578 | { |
| 579 | ide_hwif_t *hwif = HWIF(drive); |
| 580 | u8 dma_stat = hwif->INB(hwif->dma_status); |
| 581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | /* return 1 if INTR asserted */ |
| 583 | if ((dma_stat & 4) == 4) |
| 584 | return 1; |
| 585 | if (!drive->waiting_for_dma) |
| 586 | printk(KERN_WARNING "%s: (%s) called while not waiting\n", |
| 587 | drive->name, __FUNCTION__); |
| 588 | return 0; |
| 589 | } |
Bartlomiej Zolnierkiewicz | 0ae2e17 | 2007-10-16 22:29:55 +0200 | [diff] [blame] | 590 | #else |
| 591 | static inline int config_drive_for_dma(ide_drive_t *drive) { return 0; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */ |
| 593 | |
| 594 | int __ide_dma_bad_drive (ide_drive_t *drive) |
| 595 | { |
| 596 | struct hd_driveid *id = drive->id; |
| 597 | |
Jordan Crouse | 65e5f2e | 2005-12-15 02:16:18 +0100 | [diff] [blame] | 598 | int blacklist = ide_in_drive_list(id, drive_blacklist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | if (blacklist) { |
| 600 | printk(KERN_WARNING "%s: Disabling (U)DMA for %s (blacklisted)\n", |
| 601 | drive->name, id->model); |
| 602 | return blacklist; |
| 603 | } |
| 604 | return 0; |
| 605 | } |
| 606 | |
| 607 | EXPORT_SYMBOL(__ide_dma_bad_drive); |
| 608 | |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 609 | static const u8 xfer_mode_bases[] = { |
| 610 | XFER_UDMA_0, |
| 611 | XFER_MW_DMA_0, |
| 612 | XFER_SW_DMA_0, |
| 613 | }; |
| 614 | |
Bartlomiej Zolnierkiewicz | 7670df7 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 615 | static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base, u8 req_mode) |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 616 | { |
| 617 | struct hd_driveid *id = drive->id; |
| 618 | ide_hwif_t *hwif = drive->hwif; |
| 619 | unsigned int mask = 0; |
| 620 | |
| 621 | switch(base) { |
| 622 | case XFER_UDMA_0: |
| 623 | if ((id->field_valid & 4) == 0) |
| 624 | break; |
| 625 | |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 626 | if (hwif->udma_filter) |
Sergei Shtylyov | 851dd33 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 627 | mask = hwif->udma_filter(drive); |
| 628 | else |
| 629 | mask = hwif->ultra_mask; |
| 630 | mask &= id->dma_ultra; |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 631 | |
Bartlomiej Zolnierkiewicz | 7670df7 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 632 | /* |
| 633 | * avoid false cable warning from eighty_ninty_three() |
| 634 | */ |
| 635 | if (req_mode > XFER_UDMA_2) { |
| 636 | if ((mask & 0x78) && (eighty_ninty_three(drive) == 0)) |
| 637 | mask &= 0x07; |
| 638 | } |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 639 | break; |
| 640 | case XFER_MW_DMA_0: |
Sergei Shtylyov | b4e4436 | 2007-10-11 23:53:58 +0200 | [diff] [blame] | 641 | if ((id->field_valid & 2) == 0) |
| 642 | break; |
| 643 | if (hwif->mdma_filter) |
| 644 | mask = hwif->mdma_filter(drive); |
| 645 | else |
| 646 | mask = hwif->mwdma_mask; |
| 647 | mask &= id->dma_mword; |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 648 | break; |
| 649 | case XFER_SW_DMA_0: |
Bartlomiej Zolnierkiewicz | 15a4f94 | 2007-07-09 23:17:57 +0200 | [diff] [blame] | 650 | if (id->field_valid & 2) { |
Bartlomiej Zolnierkiewicz | 3649c06 | 2007-05-16 00:51:46 +0200 | [diff] [blame] | 651 | mask = id->dma_1word & hwif->swdma_mask; |
Bartlomiej Zolnierkiewicz | 15a4f94 | 2007-07-09 23:17:57 +0200 | [diff] [blame] | 652 | } else if (id->tDMA) { |
| 653 | /* |
| 654 | * ide_fix_driveid() doesn't convert ->tDMA to the |
| 655 | * CPU endianness so we need to do it here |
| 656 | */ |
| 657 | u8 mode = le16_to_cpu(id->tDMA); |
| 658 | |
| 659 | /* |
| 660 | * if the mode is valid convert it to the mask |
| 661 | * (the maximum allowed mode is XFER_SW_DMA_2) |
| 662 | */ |
| 663 | if (mode <= 2) |
| 664 | mask = ((2 << mode) - 1) & hwif->swdma_mask; |
| 665 | } |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 666 | break; |
| 667 | default: |
| 668 | BUG(); |
| 669 | break; |
| 670 | } |
| 671 | |
| 672 | return mask; |
| 673 | } |
| 674 | |
| 675 | /** |
Bartlomiej Zolnierkiewicz | 7670df7 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 676 | * ide_find_dma_mode - compute DMA speed |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 677 | * @drive: IDE device |
Bartlomiej Zolnierkiewicz | 7670df7 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 678 | * @req_mode: requested mode |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 679 | * |
Bartlomiej Zolnierkiewicz | 7670df7 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 680 | * Checks the drive/host capabilities and finds the speed to use for |
| 681 | * the DMA transfer. The speed is then limited by the requested mode. |
| 682 | * |
| 683 | * Returns 0 if the drive/host combination is incapable of DMA transfers |
| 684 | * or if the requested mode is not a DMA mode. |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 685 | */ |
| 686 | |
Bartlomiej Zolnierkiewicz | 7670df7 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 687 | u8 ide_find_dma_mode(ide_drive_t *drive, u8 req_mode) |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 688 | { |
| 689 | ide_hwif_t *hwif = drive->hwif; |
| 690 | unsigned int mask; |
| 691 | int x, i; |
| 692 | u8 mode = 0; |
| 693 | |
Bartlomiej Zolnierkiewicz | 33c1002 | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 694 | if (drive->media != ide_disk) { |
| 695 | if (hwif->host_flags & IDE_HFLAG_NO_ATAPI_DMA) |
| 696 | return 0; |
| 697 | } |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 698 | |
| 699 | for (i = 0; i < ARRAY_SIZE(xfer_mode_bases); i++) { |
Bartlomiej Zolnierkiewicz | 7670df7 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 700 | if (req_mode < xfer_mode_bases[i]) |
| 701 | continue; |
| 702 | mask = ide_get_mode_mask(drive, xfer_mode_bases[i], req_mode); |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 703 | x = fls(mask) - 1; |
| 704 | if (x >= 0) { |
| 705 | mode = xfer_mode_bases[i] + x; |
| 706 | break; |
| 707 | } |
| 708 | } |
| 709 | |
Bartlomiej Zolnierkiewicz | 75d7d96 | 2007-10-13 17:47:50 +0200 | [diff] [blame] | 710 | if (hwif->chipset == ide_acorn && mode == 0) { |
| 711 | /* |
| 712 | * is this correct? |
| 713 | */ |
| 714 | if (ide_dma_good_drive(drive) && drive->id->eide_dma_time < 150) |
| 715 | mode = XFER_MW_DMA_1; |
| 716 | } |
| 717 | |
Bartlomiej Zolnierkiewicz | 3ab7efe | 2007-12-12 23:31:58 +0100 | [diff] [blame] | 718 | mode = min(mode, req_mode); |
| 719 | |
| 720 | printk(KERN_INFO "%s: %s mode selected\n", drive->name, |
Bartlomiej Zolnierkiewicz | d34887d | 2007-11-05 21:42:27 +0100 | [diff] [blame] | 721 | mode ? ide_xfer_verbose(mode) : "no DMA"); |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 722 | |
Bartlomiej Zolnierkiewicz | 3ab7efe | 2007-12-12 23:31:58 +0100 | [diff] [blame] | 723 | return mode; |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 724 | } |
| 725 | |
Bartlomiej Zolnierkiewicz | 7670df7 | 2007-10-11 23:53:59 +0200 | [diff] [blame] | 726 | EXPORT_SYMBOL_GPL(ide_find_dma_mode); |
Bartlomiej Zolnierkiewicz | 2d5eaa6 | 2007-05-10 00:01:08 +0200 | [diff] [blame] | 727 | |
Bartlomiej Zolnierkiewicz | 0ae2e17 | 2007-10-16 22:29:55 +0200 | [diff] [blame] | 728 | static int ide_tune_dma(ide_drive_t *drive) |
Bartlomiej Zolnierkiewicz | 29e744d | 2007-05-10 00:01:09 +0200 | [diff] [blame] | 729 | { |
Bartlomiej Zolnierkiewicz | 8704de8 | 2008-01-26 20:13:00 +0100 | [diff] [blame] | 730 | ide_hwif_t *hwif = drive->hwif; |
Bartlomiej Zolnierkiewicz | 29e744d | 2007-05-10 00:01:09 +0200 | [diff] [blame] | 731 | u8 speed; |
| 732 | |
Bartlomiej Zolnierkiewicz | c223701 | 2007-10-16 22:29:58 +0200 | [diff] [blame] | 733 | if (noautodma || drive->nodma || (drive->id->capability & 1) == 0) |
Bartlomiej Zolnierkiewicz | 122ab08 | 2007-05-16 00:51:46 +0200 | [diff] [blame] | 734 | return 0; |
| 735 | |
| 736 | /* consult the list of known "bad" drives */ |
| 737 | if (__ide_dma_bad_drive(drive)) |
Bartlomiej Zolnierkiewicz | 29e744d | 2007-05-10 00:01:09 +0200 | [diff] [blame] | 738 | return 0; |
| 739 | |
Bartlomiej Zolnierkiewicz | 3ab7efe | 2007-12-12 23:31:58 +0100 | [diff] [blame] | 740 | if (ide_id_dma_bug(drive)) |
| 741 | return 0; |
| 742 | |
Bartlomiej Zolnierkiewicz | 8704de8 | 2008-01-26 20:13:00 +0100 | [diff] [blame] | 743 | if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA) |
Bartlomiej Zolnierkiewicz | 0ae2e17 | 2007-10-16 22:29:55 +0200 | [diff] [blame] | 744 | return config_drive_for_dma(drive); |
| 745 | |
Bartlomiej Zolnierkiewicz | 29e744d | 2007-05-10 00:01:09 +0200 | [diff] [blame] | 746 | speed = ide_max_dma_mode(drive); |
| 747 | |
Bartlomiej Zolnierkiewicz | 8704de8 | 2008-01-26 20:13:00 +0100 | [diff] [blame] | 748 | if (!speed) { |
| 749 | /* is this really correct/needed? */ |
| 750 | if ((hwif->host_flags & IDE_HFLAG_CY82C693) && |
| 751 | ide_dma_good_drive(drive)) |
| 752 | return 1; |
| 753 | else |
| 754 | return 0; |
| 755 | } |
Bartlomiej Zolnierkiewicz | 29e744d | 2007-05-10 00:01:09 +0200 | [diff] [blame] | 756 | |
Bartlomiej Zolnierkiewicz | 8704de8 | 2008-01-26 20:13:00 +0100 | [diff] [blame] | 757 | if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE) |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 758 | return 0; |
| 759 | |
| 760 | if (ide_set_dma_mode(drive, speed)) |
Bartlomiej Zolnierkiewicz | 4728d54 | 2007-05-16 00:51:46 +0200 | [diff] [blame] | 761 | return 0; |
Bartlomiej Zolnierkiewicz | 29e744d | 2007-05-10 00:01:09 +0200 | [diff] [blame] | 762 | |
Bartlomiej Zolnierkiewicz | 4728d54 | 2007-05-16 00:51:46 +0200 | [diff] [blame] | 763 | return 1; |
Bartlomiej Zolnierkiewicz | 29e744d | 2007-05-10 00:01:09 +0200 | [diff] [blame] | 764 | } |
| 765 | |
Bartlomiej Zolnierkiewicz | 0ae2e17 | 2007-10-16 22:29:55 +0200 | [diff] [blame] | 766 | static int ide_dma_check(ide_drive_t *drive) |
| 767 | { |
| 768 | ide_hwif_t *hwif = drive->hwif; |
| 769 | int vdma = (hwif->host_flags & IDE_HFLAG_VDMA)? 1 : 0; |
| 770 | |
| 771 | if (!vdma && ide_tune_dma(drive)) |
| 772 | return 0; |
| 773 | |
| 774 | /* TODO: always do PIO fallback */ |
| 775 | if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA) |
| 776 | return -1; |
| 777 | |
| 778 | ide_set_max_pio(drive); |
| 779 | |
| 780 | return vdma ? 0 : -1; |
| 781 | } |
| 782 | |
Bartlomiej Zolnierkiewicz | 3ab7efe | 2007-12-12 23:31:58 +0100 | [diff] [blame] | 783 | int ide_id_dma_bug(ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | { |
Bartlomiej Zolnierkiewicz | 3ab7efe | 2007-12-12 23:31:58 +0100 | [diff] [blame] | 785 | struct hd_driveid *id = drive->id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | |
| 787 | if (id->field_valid & 4) { |
| 788 | if ((id->dma_ultra >> 8) && (id->dma_mword >> 8)) |
Bartlomiej Zolnierkiewicz | 3ab7efe | 2007-12-12 23:31:58 +0100 | [diff] [blame] | 789 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | } else if (id->field_valid & 2) { |
| 791 | if ((id->dma_mword >> 8) && (id->dma_1word >> 8)) |
Bartlomiej Zolnierkiewicz | 3ab7efe | 2007-12-12 23:31:58 +0100 | [diff] [blame] | 792 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | } |
Bartlomiej Zolnierkiewicz | 3ab7efe | 2007-12-12 23:31:58 +0100 | [diff] [blame] | 794 | return 0; |
| 795 | err_out: |
| 796 | printk(KERN_ERR "%s: bad DMA info in identify block\n", drive->name); |
| 797 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | } |
| 799 | |
Bartlomiej Zolnierkiewicz | 3608b5d | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 800 | int ide_set_dma(ide_drive_t *drive) |
| 801 | { |
Bartlomiej Zolnierkiewicz | 3608b5d | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 802 | int rc; |
| 803 | |
Bartlomiej Zolnierkiewicz | 7b90599 | 2008-01-25 22:17:19 +0100 | [diff] [blame] | 804 | /* |
| 805 | * Force DMAing for the beginning of the check. |
| 806 | * Some chipsets appear to do interesting |
| 807 | * things, if not checked and cleared. |
| 808 | * PARANOIA!!! |
| 809 | */ |
Bartlomiej Zolnierkiewicz | 4a546e0 | 2008-01-26 20:13:01 +0100 | [diff] [blame] | 810 | ide_dma_off_quietly(drive); |
Bartlomiej Zolnierkiewicz | 7b90599 | 2008-01-25 22:17:19 +0100 | [diff] [blame] | 811 | |
Bartlomiej Zolnierkiewicz | 0ae2e17 | 2007-10-16 22:29:55 +0200 | [diff] [blame] | 812 | rc = ide_dma_check(drive); |
Bartlomiej Zolnierkiewicz | 7b90599 | 2008-01-25 22:17:19 +0100 | [diff] [blame] | 813 | if (rc) |
| 814 | return rc; |
Bartlomiej Zolnierkiewicz | 3608b5d | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 815 | |
Bartlomiej Zolnierkiewicz | 4a546e0 | 2008-01-26 20:13:01 +0100 | [diff] [blame] | 816 | ide_dma_on(drive); |
| 817 | |
| 818 | return 0; |
Bartlomiej Zolnierkiewicz | 3608b5d | 2007-02-17 02:40:26 +0100 | [diff] [blame] | 819 | } |
| 820 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | #ifdef CONFIG_BLK_DEV_IDEDMA_PCI |
Sergei Shtylyov | 841d2a9 | 2007-07-09 23:17:54 +0200 | [diff] [blame] | 822 | void ide_dma_lost_irq (ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | { |
| 824 | printk("%s: DMA interrupt recovery\n", drive->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | } |
| 826 | |
Sergei Shtylyov | 841d2a9 | 2007-07-09 23:17:54 +0200 | [diff] [blame] | 827 | EXPORT_SYMBOL(ide_dma_lost_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | |
Sergei Shtylyov | c283f5d | 2007-07-09 23:17:54 +0200 | [diff] [blame] | 829 | void ide_dma_timeout (ide_drive_t *drive) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | { |
Sergei Shtylyov | c283f5d | 2007-07-09 23:17:54 +0200 | [diff] [blame] | 831 | ide_hwif_t *hwif = HWIF(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | |
Sergei Shtylyov | c283f5d | 2007-07-09 23:17:54 +0200 | [diff] [blame] | 833 | printk(KERN_ERR "%s: timeout waiting for DMA\n", drive->name); |
| 834 | |
| 835 | if (hwif->ide_dma_test_irq(drive)) |
| 836 | return; |
| 837 | |
| 838 | hwif->ide_dma_end(drive); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | } |
| 840 | |
Sergei Shtylyov | c283f5d | 2007-07-09 23:17:54 +0200 | [diff] [blame] | 841 | EXPORT_SYMBOL(ide_dma_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | |
Bartlomiej Zolnierkiewicz | a02bfd3 | 2007-10-20 00:32:37 +0200 | [diff] [blame] | 843 | static void ide_release_dma_engine(ide_hwif_t *hwif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | { |
| 845 | if (hwif->dmatable_cpu) { |
| 846 | pci_free_consistent(hwif->pci_dev, |
| 847 | PRD_ENTRIES * PRD_BYTES, |
| 848 | hwif->dmatable_cpu, |
| 849 | hwif->dmatable_dma); |
| 850 | hwif->dmatable_cpu = NULL; |
| 851 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | } |
| 853 | |
| 854 | static int ide_release_iomio_dma(ide_hwif_t *hwif) |
| 855 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | release_region(hwif->dma_base, 8); |
Sergei Shtylylov | 020e322 | 2006-10-03 01:14:13 -0700 | [diff] [blame] | 857 | if (hwif->extra_ports) |
| 858 | release_region(hwif->extra_base, hwif->extra_ports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | return 1; |
| 860 | } |
| 861 | |
| 862 | /* |
| 863 | * Needed for allowing full modular support of ide-driver |
| 864 | */ |
Sergei Shtylylov | dc844e0 | 2006-10-03 01:14:14 -0700 | [diff] [blame] | 865 | int ide_release_dma(ide_hwif_t *hwif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | { |
Sergei Shtylylov | dc844e0 | 2006-10-03 01:14:14 -0700 | [diff] [blame] | 867 | ide_release_dma_engine(hwif); |
| 868 | |
Bartlomiej Zolnierkiewicz | 2ad1e55 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 869 | if (hwif->mmio) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | return 1; |
Sergei Shtylylov | dc844e0 | 2006-10-03 01:14:14 -0700 | [diff] [blame] | 871 | else |
| 872 | return ide_release_iomio_dma(hwif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | } |
| 874 | |
| 875 | static int ide_allocate_dma_engine(ide_hwif_t *hwif) |
| 876 | { |
| 877 | hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev, |
| 878 | PRD_ENTRIES * PRD_BYTES, |
| 879 | &hwif->dmatable_dma); |
| 880 | |
| 881 | if (hwif->dmatable_cpu) |
| 882 | return 0; |
| 883 | |
Sergei Shtylylov | dc844e0 | 2006-10-03 01:14:14 -0700 | [diff] [blame] | 884 | printk(KERN_ERR "%s: -- Error, unable to allocate DMA table.\n", |
| 885 | hwif->cds->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | return 1; |
| 888 | } |
| 889 | |
Sergei Shtylyov | ecf32796 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 890 | static int ide_mapped_mmio_dma(ide_hwif_t *hwif, unsigned long base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | { |
| 892 | printk(KERN_INFO " %s: MMIO-DMA ", hwif->name); |
| 893 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | return 0; |
| 895 | } |
| 896 | |
Sergei Shtylyov | ecf32796 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 897 | static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | { |
| 899 | printk(KERN_INFO " %s: BM-DMA at 0x%04lx-0x%04lx", |
Sergei Shtylyov | ecf32796 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 900 | hwif->name, base, base + 7); |
Sergei Shtylylov | 020e322 | 2006-10-03 01:14:13 -0700 | [diff] [blame] | 901 | |
Sergei Shtylyov | ecf32796 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 902 | if (!request_region(base, 8, hwif->name)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | printk(" -- Error, ports in use.\n"); |
| 904 | return 1; |
| 905 | } |
Sergei Shtylylov | 020e322 | 2006-10-03 01:14:13 -0700 | [diff] [blame] | 906 | |
Sergei Shtylylov | 020e322 | 2006-10-03 01:14:13 -0700 | [diff] [blame] | 907 | if (hwif->cds->extra) { |
| 908 | hwif->extra_base = base + (hwif->channel ? 8 : 16); |
| 909 | |
| 910 | if (!hwif->mate || !hwif->mate->extra_ports) { |
| 911 | if (!request_region(hwif->extra_base, |
| 912 | hwif->cds->extra, hwif->cds->name)) { |
| 913 | printk(" -- Error, extra ports in use.\n"); |
Sergei Shtylyov | ecf32796 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 914 | release_region(base, 8); |
Sergei Shtylylov | 020e322 | 2006-10-03 01:14:13 -0700 | [diff] [blame] | 915 | return 1; |
| 916 | } |
| 917 | hwif->extra_ports = hwif->cds->extra; |
| 918 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | } |
Sergei Shtylylov | 020e322 | 2006-10-03 01:14:13 -0700 | [diff] [blame] | 920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | return 0; |
| 922 | } |
| 923 | |
Sergei Shtylyov | ecf32796 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 924 | static int ide_dma_iobase(ide_hwif_t *hwif, unsigned long base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | { |
Bartlomiej Zolnierkiewicz | 2ad1e55 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 926 | if (hwif->mmio) |
Sergei Shtylyov | ecf32796 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 927 | return ide_mapped_mmio_dma(hwif, base); |
Bartlomiej Zolnierkiewicz | 2ad1e55 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 928 | |
Sergei Shtylyov | ecf32796 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 929 | return ide_iomio_dma(hwif, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | } |
| 931 | |
Sergei Shtylyov | ecf32796 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 932 | void ide_setup_dma(ide_hwif_t *hwif, unsigned long base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | { |
Sergei Shtylyov | 4e5a68a | 2008-02-01 23:09:29 +0100 | [diff] [blame] | 934 | u8 dma_stat; |
| 935 | |
Sergei Shtylyov | ecf32796 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 936 | if (ide_dma_iobase(hwif, base)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | return; |
| 938 | |
| 939 | if (ide_allocate_dma_engine(hwif)) { |
| 940 | ide_release_dma(hwif); |
| 941 | return; |
| 942 | } |
| 943 | |
Bartlomiej Zolnierkiewicz | a02bfd3 | 2007-10-20 00:32:37 +0200 | [diff] [blame] | 944 | hwif->dma_base = base; |
| 945 | |
Sergei Shtylyov | ecf32796 | 2008-02-01 23:09:30 +0100 | [diff] [blame] | 946 | if (!hwif->dma_command) |
| 947 | hwif->dma_command = hwif->dma_base + 0; |
| 948 | if (!hwif->dma_vendor1) |
| 949 | hwif->dma_vendor1 = hwif->dma_base + 1; |
| 950 | if (!hwif->dma_status) |
| 951 | hwif->dma_status = hwif->dma_base + 2; |
| 952 | if (!hwif->dma_vendor3) |
| 953 | hwif->dma_vendor3 = hwif->dma_base + 3; |
| 954 | if (!hwif->dma_prdtable) |
| 955 | hwif->dma_prdtable = hwif->dma_base + 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | |
Bartlomiej Zolnierkiewicz | 15ce926 | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 957 | if (!hwif->dma_host_set) |
| 958 | hwif->dma_host_set = &ide_dma_host_set; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | if (!hwif->dma_setup) |
| 960 | hwif->dma_setup = &ide_dma_setup; |
| 961 | if (!hwif->dma_exec_cmd) |
| 962 | hwif->dma_exec_cmd = &ide_dma_exec_cmd; |
| 963 | if (!hwif->dma_start) |
| 964 | hwif->dma_start = &ide_dma_start; |
| 965 | if (!hwif->ide_dma_end) |
| 966 | hwif->ide_dma_end = &__ide_dma_end; |
| 967 | if (!hwif->ide_dma_test_irq) |
| 968 | hwif->ide_dma_test_irq = &__ide_dma_test_irq; |
Sergei Shtylyov | c283f5d | 2007-07-09 23:17:54 +0200 | [diff] [blame] | 969 | if (!hwif->dma_timeout) |
| 970 | hwif->dma_timeout = &ide_dma_timeout; |
Sergei Shtylyov | 841d2a9 | 2007-07-09 23:17:54 +0200 | [diff] [blame] | 971 | if (!hwif->dma_lost_irq) |
| 972 | hwif->dma_lost_irq = &ide_dma_lost_irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | |
Sergei Shtylyov | 4e5a68a | 2008-02-01 23:09:29 +0100 | [diff] [blame] | 974 | dma_stat = hwif->INB(hwif->dma_status); |
| 975 | printk(KERN_CONT ", BIOS settings: %s:%s, %s:%s\n", |
| 976 | hwif->drives[0].name, (dma_stat & 0x20) ? "DMA" : "PIO", |
| 977 | hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "PIO"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | } |
| 979 | |
| 980 | EXPORT_SYMBOL_GPL(ide_setup_dma); |
| 981 | #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */ |