ata-dma.c revision 144800
145095Ssos/*- 2144330Ssos * Copyright (c) 1998 - 2005 S�ren Schmidt <sos@FreeBSD.org> 345095Ssos * All rights reserved. 445095Ssos * 545095Ssos * Redistribution and use in source and binary forms, with or without 645095Ssos * modification, are permitted provided that the following conditions 745095Ssos * are met: 845095Ssos * 1. Redistributions of source code must retain the above copyright 945095Ssos * notice, this list of conditions and the following disclaimer, 1045095Ssos * without modification, immediately at the beginning of the file. 1145095Ssos * 2. Redistributions in binary form must reproduce the above copyright 1245095Ssos * notice, this list of conditions and the following disclaimer in the 1345095Ssos * documentation and/or other materials provided with the distribution. 1445095Ssos * 3. The name of the author may not be used to endorse or promote products 1545095Ssos * derived from this software without specific prior written permission. 1645095Ssos * 1745095Ssos * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1845095Ssos * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1945095Ssos * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2045095Ssos * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2145095Ssos * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2245095Ssos * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2345095Ssos * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2445095Ssos * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2545095Ssos * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2645095Ssos * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2745095Ssos */ 2845095Ssos 29119418Sobrien#include <sys/cdefs.h> 30119418Sobrien__FBSDID("$FreeBSD: head/sys/dev/ata/ata-dma.c 144800 2005-04-08 12:16:51Z sos $"); 31119418Sobrien 3245095Ssos#include <sys/param.h> 3345095Ssos#include <sys/systm.h> 3474302Ssos#include <sys/ata.h> 35111188Ssos#include <sys/kernel.h> 3695533Smike#include <sys/endian.h> 3745095Ssos#include <sys/malloc.h> 38117126Sscottl#include <sys/lock.h> 39124403Ssos#include <sys/sema.h> 40119404Ssos#include <sys/taskqueue.h> 41124534Ssos#include <vm/uma.h> 4245798Ssos#include <sys/bus.h> 4366106Ssos#include <machine/bus.h> 4472106Ssos#include <sys/rman.h> 45119404Ssos#include <dev/pci/pcivar.h> 4645095Ssos#include <dev/ata/ata-all.h> 47111188Ssos#include <dev/ata/ata-pci.h> 4845095Ssos 4952067Ssos/* prototypes */ 50119453Ssosstatic void ata_dmaalloc(struct ata_channel *); 51112791Ssosstatic void ata_dmafree(struct ata_channel *); 52133637Ssosstatic void ata_dmasetprd(void *, bus_dma_segment_t *, int, int); 53121310Ssosstatic int ata_dmaload(struct ata_device *, caddr_t, int32_t, int); 54121310Ssosstatic int ata_dmaunload(struct ata_channel *); 5552067Ssos 56111188Ssos/* local vars */ 57111188Ssosstatic MALLOC_DEFINE(M_ATADMA, "ATA DMA", "ATA driver DMA"); 58111188Ssos 5952067Ssos/* misc defines */ 60144330Ssos#define MAXTABSZ PAGE_SIZE 61144330Ssos#define MAXWSPCSZ PAGE_SIZE 6245720Speter 6393882Ssosstruct ata_dc_cb_args { 6493882Ssos bus_addr_t maddr; 6593882Ssos int error; 6693882Ssos}; 6793882Ssos 68119453Ssosvoid 69111188Ssosata_dmainit(struct ata_channel *ch) 70111188Ssos{ 71119453Ssos if ((ch->dma = malloc(sizeof(struct ata_dma), M_ATADMA, M_NOWAIT|M_ZERO))) { 72119453Ssos ch->dma->alloc = ata_dmaalloc; 73119453Ssos ch->dma->free = ata_dmafree; 74133637Ssos ch->dma->setprd = ata_dmasetprd; 75121310Ssos ch->dma->load = ata_dmaload; 76121310Ssos ch->dma->unload = ata_dmaunload; 77119453Ssos ch->dma->alignment = 2; 78135034Ssos ch->dma->max_iosize = 128 * DEV_BSIZE; 79135034Ssos ch->dma->boundary = 128 * DEV_BSIZE; 80119453Ssos } 81111188Ssos} 82111188Ssos 8393882Ssosstatic void 8493882Ssosata_dmasetupc_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int error) 8566070Ssos{ 8693882Ssos struct ata_dc_cb_args *cba = (struct ata_dc_cb_args *)xsc; 8766070Ssos 8893882Ssos if (!(cba->error = error)) 8993882Ssos cba->maddr = segs[0].ds_addr; 9093882Ssos} 9193882Ssos 92119453Ssosstatic void 93112791Ssosata_dmaalloc(struct ata_channel *ch) 9493882Ssos{ 9593882Ssos struct ata_dc_cb_args ccba; 9693882Ssos 97134090Ssos if (bus_dma_tag_create(NULL, ch->dma->alignment, 0, 98120883Ssos BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, 99135034Ssos NULL, NULL, 256 * DEV_BSIZE, 100134090Ssos ATA_DMA_ENTRIES, ch->dma->max_iosize, 101137809Sscottl 0, NULL, NULL, &ch->dma->dmatag)) 102119453Ssos goto error; 103119453Ssos 104120883Ssos if (bus_dma_tag_create(ch->dma->dmatag, PAGE_SIZE, PAGE_SIZE, 105119453Ssos BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, 106120883Ssos NULL, NULL, MAXTABSZ, 1, MAXTABSZ, 107144330Ssos 0, NULL, NULL, &ch->dma->sg_tag)) 108119453Ssos goto error; 109119453Ssos 110123034Ssos if (bus_dma_tag_create(ch->dma->dmatag,ch->dma->alignment,ch->dma->boundary, 111119453Ssos BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, 112135034Ssos NULL, NULL, 256 * DEV_BSIZE, 113134090Ssos ATA_DMA_ENTRIES, ch->dma->max_iosize, 114144330Ssos BUS_DMA_ALLOCNOW, NULL, NULL, &ch->dma->data_tag)) 115119453Ssos goto error; 116119453Ssos 117144330Ssos if (bus_dmamem_alloc(ch->dma->sg_tag, (void **)&ch->dma->sg, 0, 118144330Ssos &ch->dma->sg_map)) 119119453Ssos goto error; 120119453Ssos 121144330Ssos if (bus_dmamap_load(ch->dma->sg_tag, ch->dma->sg_map, ch->dma->sg, 122119453Ssos MAXTABSZ, ata_dmasetupc_cb, &ccba, 0) || ccba.error) { 123144330Ssos bus_dmamem_free(ch->dma->sg_tag, ch->dma->sg, ch->dma->sg_map); 124119453Ssos goto error; 125112791Ssos } 126144330Ssos ch->dma->sg_bus = ccba.maddr; 127128183Ssos 128144330Ssos if (bus_dmamap_create(ch->dma->data_tag, 0, &ch->dma->data_map)) 129119453Ssos goto error; 130128183Ssos 131128183Ssos if (bus_dma_tag_create(ch->dma->dmatag, PAGE_SIZE, PAGE_SIZE, 132128183Ssos BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, 133128183Ssos NULL, NULL, MAXWSPCSZ, 1, MAXWSPCSZ, 134144330Ssos 0, NULL, NULL, &ch->dma->work_tag)) 135128183Ssos goto error; 136128183Ssos 137144330Ssos if (bus_dmamem_alloc(ch->dma->work_tag, (void **)&ch->dma->work, 0, 138144330Ssos &ch->dma->work_map)) 139128183Ssos goto error; 140128183Ssos 141144330Ssos if (bus_dmamap_load(ch->dma->work_tag, ch->dma->work_map,ch->dma->work, 142128183Ssos MAXWSPCSZ, ata_dmasetupc_cb, &ccba, 0) || ccba.error) { 143144330Ssos bus_dmamem_free(ch->dma->work_tag,ch->dma->work, ch->dma->work_map); 144128183Ssos goto error; 145128183Ssos } 146144330Ssos ch->dma->work_bus = ccba.maddr; 147128183Ssos 148119453Ssos return; 14993882Ssos 150119453Ssoserror: 151144330Ssos device_printf(ch->dev, "WARNING - DMA allocation failed, disabling DMA\n"); 152119453Ssos ata_dmafree(ch); 153119453Ssos free(ch->dma, M_ATADMA); 154119453Ssos ch->dma = NULL; 15566070Ssos} 15666070Ssos 157111188Ssosstatic void 158112791Ssosata_dmafree(struct ata_channel *ch) 15945095Ssos{ 160144330Ssos if (ch->dma->work_bus) { 161144330Ssos bus_dmamap_unload(ch->dma->work_tag, ch->dma->work_map); 162144330Ssos bus_dmamem_free(ch->dma->work_tag, ch->dma->work, ch->dma->work_map); 163144330Ssos ch->dma->work_bus = 0; 164144330Ssos ch->dma->work_map = NULL; 165144330Ssos ch->dma->work = NULL; 166128183Ssos } 167144330Ssos if (ch->dma->work_tag) { 168144330Ssos bus_dma_tag_destroy(ch->dma->work_tag); 169144330Ssos ch->dma->work_tag = NULL; 170128183Ssos } 171144330Ssos if (ch->dma->sg_bus) { 172144330Ssos bus_dmamap_unload(ch->dma->sg_tag, ch->dma->sg_map); 173144330Ssos bus_dmamem_free(ch->dma->sg_tag, ch->dma->sg, ch->dma->sg_map); 174144330Ssos ch->dma->sg_bus = 0; 175144330Ssos ch->dma->sg_map = NULL; 176144330Ssos ch->dma->sg = NULL; 17793882Ssos } 178144330Ssos if (ch->dma->data_map) { 179144330Ssos bus_dmamap_destroy(ch->dma->data_tag, ch->dma->data_map); 180144330Ssos ch->dma->data_map = NULL; 18193882Ssos } 182144330Ssos if (ch->dma->sg_tag) { 183144330Ssos bus_dma_tag_destroy(ch->dma->sg_tag); 184144330Ssos ch->dma->sg_tag = NULL; 18593882Ssos } 186144330Ssos if (ch->dma->data_tag) { 187144330Ssos bus_dma_tag_destroy(ch->dma->data_tag); 188144330Ssos ch->dma->data_tag = NULL; 18993882Ssos } 190112791Ssos if (ch->dma->dmatag) { 191112791Ssos bus_dma_tag_destroy(ch->dma->dmatag); 192112791Ssos ch->dma->dmatag = NULL; 19393882Ssos } 19493882Ssos} 19593882Ssos 19693882Ssosstatic void 197133637Ssosata_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs, int error) 19893882Ssos{ 199133637Ssos struct ata_dmasetprd_args *args = xsc; 200133637Ssos struct ata_dma_prdentry *prd = args->dmatab; 201133637Ssos int i; 20293882Ssos 203133637Ssos if ((args->error = error)) 20493882Ssos return; 205133637Ssos 20693882Ssos for (i = 0; i < nsegs; i++) { 207133637Ssos prd[i].addr = htole32(segs[i].ds_addr); 208133637Ssos prd[i].count = htole32(segs[i].ds_len); 20993882Ssos } 210133637Ssos prd[i - 1].count |= htole32(ATA_DMA_EOT); 21193882Ssos} 21293882Ssos 213111188Ssosstatic int 214121310Ssosata_dmaload(struct ata_device *atadev, caddr_t data, int32_t count, int dir) 21545095Ssos{ 216144330Ssos struct ata_channel *ch = device_get_softc(device_get_parent(atadev->dev)); 217133637Ssos struct ata_dmasetprd_args cba; 21845095Ssos 219133637Ssos if (ch->dma->flags & ATA_DMA_LOADED) { 220144330Ssos device_printf(atadev->dev, 221144330Ssos "FAILURE - already active DMA on this device\n"); 22245095Ssos return -1; 22366070Ssos } 22445095Ssos if (!count) { 225144330Ssos device_printf(atadev->dev, 226144330Ssos "FAILURE - zero length DMA transfer attempted\n"); 22745095Ssos return -1; 22845095Ssos } 229121310Ssos if (((uintptr_t)data & (ch->dma->alignment - 1)) || 230121310Ssos (count & (ch->dma->alignment - 1))) { 231144330Ssos device_printf(atadev->dev, 232144330Ssos "FAILURE - non aligned DMA transfer attempted\n"); 233121310Ssos return -1; 234121310Ssos } 235119404Ssos if (count > ch->dma->max_iosize) { 236144330Ssos device_printf(atadev->dev, 237144330Ssos "FAILURE - oversized DMA transfer attempted %d > %d\n", 238144330Ssos count, ch->dma->max_iosize); 239119404Ssos return -1; 240119404Ssos } 24145095Ssos 242144330Ssos cba.dmatab = ch->dma->sg; 24395010Ssos 244144330Ssos if (bus_dmamap_load(ch->dma->data_tag, ch->dma->data_map, data, count, 245133637Ssos ch->dma->setprd, &cba, 0) || cba.error) 24695010Ssos return -1; 24793882Ssos 248144800Ssos bus_dmamap_sync(ch->dma->sg_tag, ch->dma->sg_map, BUS_DMASYNC_PREWRITE); 249144800Ssos 250144330Ssos bus_dmamap_sync(ch->dma->data_tag, ch->dma->data_map, 251112791Ssos dir ? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); 25295010Ssos 253121310Ssos ch->dma->cur_iosize = count; 254133184Ssos ch->dma->flags = dir ? (ATA_DMA_LOADED | ATA_DMA_READ) : ATA_DMA_LOADED; 25595010Ssos return 0; 25645095Ssos} 25745095Ssos 25866070Ssosint 259121310Ssosata_dmaunload(struct ata_channel *ch) 26045095Ssos{ 261144330Ssos bus_dmamap_sync(ch->dma->sg_tag, ch->dma->sg_map, BUS_DMASYNC_POSTWRITE); 262119404Ssos 263144330Ssos bus_dmamap_sync(ch->dma->data_tag, ch->dma->data_map, 264112791Ssos (ch->dma->flags & ATA_DMA_READ) != 0 ? 26593882Ssos BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 266144330Ssos bus_dmamap_unload(ch->dma->data_tag, ch->dma->data_map); 267119404Ssos 268121310Ssos ch->dma->cur_iosize = 0; 269133184Ssos ch->dma->flags &= ~ATA_DMA_LOADED; 270112791Ssos return 0; 27145095Ssos} 272