145095Ssos/*- 2230132Suqs * Copyright (c) 1998 - 2008 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 * 1545095Ssos * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1645095Ssos * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1745095Ssos * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1845095Ssos * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 1945095Ssos * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2045095Ssos * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2145095Ssos * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2245095Ssos * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2345095Ssos * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2445095Ssos * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2545095Ssos */ 2645095Ssos 27119418Sobrien#include <sys/cdefs.h> 28119418Sobrien__FBSDID("$FreeBSD$"); 29119418Sobrien 3045095Ssos#include <sys/param.h> 3145095Ssos#include <sys/systm.h> 3274302Ssos#include <sys/ata.h> 33111188Ssos#include <sys/kernel.h> 3495533Smike#include <sys/endian.h> 3545095Ssos#include <sys/malloc.h> 36117126Sscottl#include <sys/lock.h> 37124403Ssos#include <sys/sema.h> 38119404Ssos#include <sys/taskqueue.h> 39124534Ssos#include <vm/uma.h> 4045798Ssos#include <sys/bus.h> 4166106Ssos#include <machine/bus.h> 4272106Ssos#include <sys/rman.h> 4345095Ssos#include <dev/ata/ata-all.h> 4445095Ssos 4552067Ssos/* prototypes */ 46178278Ssosstatic void ata_dmasetupc_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int error); 47178067Ssosstatic void ata_dmaalloc(device_t dev); 48178067Ssosstatic void ata_dmafree(device_t dev); 49178067Ssosstatic void ata_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs, int error); 50178067Ssosstatic int ata_dmaload(struct ata_request *request, void *addr, int *nsegs); 51178067Ssosstatic int ata_dmaunload(struct ata_request *request); 5252067Ssos 53111188Ssos/* local vars */ 54151897Srwatsonstatic MALLOC_DEFINE(M_ATADMA, "ata_dma", "ATA driver DMA"); 55111188Ssos 5652067Ssos/* misc defines */ 57144330Ssos#define MAXTABSZ PAGE_SIZE 58145713Ssos#define MAXWSPCSZ PAGE_SIZE*2 5945720Speter 6093882Ssosstruct ata_dc_cb_args { 6193882Ssos bus_addr_t maddr; 6293882Ssos int error; 6393882Ssos}; 6493882Ssos 65119453Ssosvoid 66145713Ssosata_dmainit(device_t dev) 67111188Ssos{ 68145713Ssos struct ata_channel *ch = device_get_softc(dev); 69178278Ssos struct ata_dc_cb_args dcba; 70145713Ssos 71216013Smarius if (ch->dma.alloc == NULL) 72216013Smarius ch->dma.alloc = ata_dmaalloc; 73216013Smarius if (ch->dma.free == NULL) 74216013Smarius ch->dma.free = ata_dmafree; 75216013Smarius if (ch->dma.setprd == NULL) 76216013Smarius ch->dma.setprd = ata_dmasetprd; 77216013Smarius if (ch->dma.load == NULL) 78216013Smarius ch->dma.load = ata_dmaload; 79216013Smarius if (ch->dma.unload == NULL) 80216013Smarius ch->dma.unload = ata_dmaunload; 81216013Smarius if (ch->dma.alignment == 0) 82216013Smarius ch->dma.alignment = 2; 83216013Smarius if (ch->dma.boundary == 0) 84216013Smarius ch->dma.boundary = 65536; 85216013Smarius if (ch->dma.segsize == 0) 86216013Smarius ch->dma.segsize = 65536; 87216013Smarius if (ch->dma.max_iosize == 0) 88216013Smarius ch->dma.max_iosize = MIN((ATA_DMA_ENTRIES - 1) * PAGE_SIZE, MAXPHYS); 89216013Smarius if (ch->dma.max_address == 0) 90216013Smarius ch->dma.max_address = BUS_SPACE_MAXADDR_32BIT; 91216013Smarius if (ch->dma.dma_slots == 0) 92216013Smarius ch->dma.dma_slots = 1; 93178278Ssos 94178278Ssos if (bus_dma_tag_create(bus_get_dma_tag(dev), ch->dma.alignment, 0, 95178278Ssos ch->dma.max_address, BUS_SPACE_MAXADDR, 96178278Ssos NULL, NULL, ch->dma.max_iosize, 97178278Ssos ATA_DMA_ENTRIES, ch->dma.segsize, 98178278Ssos 0, NULL, NULL, &ch->dma.dmatag)) 99178278Ssos goto error; 100178278Ssos 101178278Ssos if (bus_dma_tag_create(ch->dma.dmatag, PAGE_SIZE, 64 * 1024, 102178278Ssos ch->dma.max_address, BUS_SPACE_MAXADDR, 103178278Ssos NULL, NULL, MAXWSPCSZ, 1, MAXWSPCSZ, 104178278Ssos 0, NULL, NULL, &ch->dma.work_tag)) 105178278Ssos goto error; 106178278Ssos 107219336Smarius if (bus_dmamem_alloc(ch->dma.work_tag, (void **)&ch->dma.work, 108219336Smarius BUS_DMA_WAITOK | BUS_DMA_COHERENT, 109178278Ssos &ch->dma.work_map)) 110178278Ssos goto error; 111178278Ssos 112178278Ssos if (bus_dmamap_load(ch->dma.work_tag, ch->dma.work_map, ch->dma.work, 113178278Ssos MAXWSPCSZ, ata_dmasetupc_cb, &dcba, 0) || 114178278Ssos dcba.error) { 115178278Ssos bus_dmamem_free(ch->dma.work_tag, ch->dma.work, ch->dma.work_map); 116178278Ssos goto error; 117178278Ssos } 118178278Ssos ch->dma.work_bus = dcba.maddr; 119178278Ssos return; 120178278Ssos 121178278Ssoserror: 122178278Ssos device_printf(dev, "WARNING - DMA initialization failed, disabling DMA\n"); 123178278Ssos ata_dmafini(dev); 124111188Ssos} 125111188Ssos 126178278Ssosvoid 127178278Ssosata_dmafini(device_t dev) 128178278Ssos{ 129178278Ssos struct ata_channel *ch = device_get_softc(dev); 130178278Ssos 131178278Ssos if (ch->dma.work_bus) { 132178278Ssos bus_dmamap_unload(ch->dma.work_tag, ch->dma.work_map); 133178278Ssos bus_dmamem_free(ch->dma.work_tag, ch->dma.work, ch->dma.work_map); 134178278Ssos ch->dma.work_bus = 0; 135178278Ssos ch->dma.work = NULL; 136178278Ssos } 137178278Ssos if (ch->dma.work_tag) { 138178278Ssos bus_dma_tag_destroy(ch->dma.work_tag); 139178278Ssos ch->dma.work_tag = NULL; 140178278Ssos } 141178278Ssos if (ch->dma.dmatag) { 142178278Ssos bus_dma_tag_destroy(ch->dma.dmatag); 143178278Ssos ch->dma.dmatag = NULL; 144178278Ssos } 145178278Ssos} 146178278Ssos 14793882Ssosstatic void 14893882Ssosata_dmasetupc_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int error) 14966070Ssos{ 150178067Ssos struct ata_dc_cb_args *dcba = (struct ata_dc_cb_args *)xsc; 15166070Ssos 152178067Ssos if (!(dcba->error = error)) 153178067Ssos dcba->maddr = segs[0].ds_addr; 15493882Ssos} 15593882Ssos 156119453Ssosstatic void 157145713Ssosata_dmaalloc(device_t dev) 15893882Ssos{ 159145713Ssos struct ata_channel *ch = device_get_softc(dev); 160178067Ssos struct ata_dc_cb_args dcba; 161178278Ssos int i; 16293882Ssos 163178278Ssos /* alloc and setup needed dma slots */ 164178278Ssos bzero(ch->dma.slot, sizeof(struct ata_dmaslot) * ATA_DMA_SLOTS); 165178278Ssos for (i = 0; i < ch->dma.dma_slots; i++) { 166178278Ssos struct ata_dmaslot *slot = &ch->dma.slot[i]; 167178278Ssos 168178278Ssos if (bus_dma_tag_create(ch->dma.dmatag, PAGE_SIZE, PAGE_SIZE, 169178278Ssos ch->dma.max_address, BUS_SPACE_MAXADDR, 170178278Ssos NULL, NULL, PAGE_SIZE, 1, PAGE_SIZE, 171178278Ssos 0, NULL, NULL, &slot->sg_tag)) { 172178278Ssos device_printf(ch->dev, "FAILURE - create sg_tag\n"); 173178278Ssos goto error; 174178278Ssos } 175178278Ssos 176219336Smarius if (bus_dmamem_alloc(slot->sg_tag, (void **)&slot->sg, BUS_DMA_WAITOK, 177219336Smarius &slot->sg_map)) { 178178278Ssos device_printf(ch->dev, "FAILURE - alloc sg_map\n"); 179178278Ssos goto error; 180178278Ssos } 181178278Ssos 182178278Ssos if (bus_dmamap_load(slot->sg_tag, slot->sg_map, slot->sg, MAXTABSZ, 183178278Ssos ata_dmasetupc_cb, &dcba, 0) || dcba.error) { 184178278Ssos device_printf(ch->dev, "FAILURE - load sg\n"); 185178278Ssos goto error; 186178278Ssos } 187178278Ssos slot->sg_bus = dcba.maddr; 188178278Ssos 189178278Ssos if (bus_dma_tag_create(ch->dma.dmatag, 190178278Ssos ch->dma.alignment, ch->dma.boundary, 191178278Ssos ch->dma.max_address, BUS_SPACE_MAXADDR, 192178278Ssos NULL, NULL, ch->dma.max_iosize, 193178278Ssos ATA_DMA_ENTRIES, ch->dma.segsize, 194178278Ssos BUS_DMA_ALLOCNOW, NULL, NULL, &slot->data_tag)) { 195178278Ssos device_printf(ch->dev, "FAILURE - create data_tag\n"); 196178278Ssos goto error; 197178278Ssos } 198178278Ssos 199178278Ssos if (bus_dmamap_create(slot->data_tag, 0, &slot->data_map)) { 200178278Ssos device_printf(ch->dev, "FAILURE - create data_map\n"); 201178278Ssos goto error; 202178278Ssos } 203178278Ssos } 204178278Ssos 205119453Ssos return; 20693882Ssos 207119453Ssoserror: 208145713Ssos device_printf(dev, "WARNING - DMA allocation failed, disabling DMA\n"); 209145713Ssos ata_dmafree(dev); 21066070Ssos} 21166070Ssos 212111188Ssosstatic void 213145713Ssosata_dmafree(device_t dev) 21445095Ssos{ 215145713Ssos struct ata_channel *ch = device_get_softc(dev); 216178278Ssos int i; 217145713Ssos 218178278Ssos /* free all dma slots */ 219178278Ssos for (i = 0; i < ATA_DMA_SLOTS; i++) { 220178278Ssos struct ata_dmaslot *slot = &ch->dma.slot[i]; 221178278Ssos 222178278Ssos if (slot->sg_bus) { 223178278Ssos bus_dmamap_unload(slot->sg_tag, slot->sg_map); 224178278Ssos slot->sg_bus = 0; 225178278Ssos } 226267340Sjhb if (slot->sg) { 227178278Ssos bus_dmamem_free(slot->sg_tag, slot->sg, slot->sg_map); 228178278Ssos slot->sg = NULL; 229178278Ssos } 230178278Ssos if (slot->data_map) { 231178278Ssos bus_dmamap_destroy(slot->data_tag, slot->data_map); 232178278Ssos slot->data_map = NULL; 233178278Ssos } 234178278Ssos if (slot->sg_tag) { 235178278Ssos bus_dma_tag_destroy(slot->sg_tag); 236178278Ssos slot->sg_tag = NULL; 237178278Ssos } 238178278Ssos if (slot->data_tag) { 239178278Ssos bus_dma_tag_destroy(slot->data_tag); 240178278Ssos slot->data_tag = NULL; 241178278Ssos } 242128183Ssos } 24393882Ssos} 24493882Ssos 24593882Ssosstatic void 246133637Ssosata_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs, int error) 24793882Ssos{ 248133637Ssos struct ata_dmasetprd_args *args = xsc; 249133637Ssos struct ata_dma_prdentry *prd = args->dmatab; 250133637Ssos int i; 25193882Ssos 252133637Ssos if ((args->error = error)) 25393882Ssos return; 254133637Ssos 25593882Ssos for (i = 0; i < nsegs; i++) { 256133637Ssos prd[i].addr = htole32(segs[i].ds_addr); 257133637Ssos prd[i].count = htole32(segs[i].ds_len); 25893882Ssos } 259133637Ssos prd[i - 1].count |= htole32(ATA_DMA_EOT); 260173768Skevlo KASSERT(nsegs <= ATA_DMA_ENTRIES, ("too many DMA segment entries\n")); 261145818Ssos args->nsegs = nsegs; 26293882Ssos} 26393882Ssos 264111188Ssosstatic int 265178067Ssosata_dmaload(struct ata_request *request, void *addr, int *entries) 26645095Ssos{ 267178067Ssos struct ata_channel *ch = device_get_softc(request->parent); 268178067Ssos struct ata_dmasetprd_args dspa; 269153142Ssos int error; 27045095Ssos 271178067Ssos ATA_DEBUG_RQ(request, "dmaload"); 272178067Ssos 273178278Ssos if (request->dma) { 274198717Smav device_printf(request->parent, 275178067Ssos "FAILURE - already active DMA on this device\n"); 276153142Ssos return EIO; 27766070Ssos } 278178067Ssos if (!request->bytecount) { 279198717Smav device_printf(request->parent, 280178067Ssos "FAILURE - zero length DMA transfer attempted\n"); 281153142Ssos return EIO; 28245095Ssos } 283196893Smav if (request->bytecount & (ch->dma.alignment - 1)) { 284198717Smav device_printf(request->parent, 285196893Smav "FAILURE - odd-sized DMA transfer attempt %d %% %d\n", 286196893Smav request->bytecount, ch->dma.alignment); 287153142Ssos return EIO; 288121310Ssos } 289178067Ssos if (request->bytecount > ch->dma.max_iosize) { 290198717Smav device_printf(request->parent, 291178067Ssos "FAILURE - oversized DMA transfer attempt %d > %d\n", 292178067Ssos request->bytecount, ch->dma.max_iosize); 293153142Ssos return EIO; 294119404Ssos } 29545095Ssos 296198717Smav /* set our slot. XXX SOS NCQ will change that */ 297198717Smav request->dma = &ch->dma.slot[0]; 298145818Ssos 299178067Ssos if (addr) 300178067Ssos dspa.dmatab = addr; 301178067Ssos else 302178278Ssos dspa.dmatab = request->dma->sg; 303178067Ssos 304247165Smav if (request->flags & ATA_R_DATA_IN_CCB) 305246713Skib error = bus_dmamap_load_ccb(request->dma->data_tag, 306246713Skib request->dma->data_map, request->ccb, 307246713Skib ch->dma.setprd, &dspa, BUS_DMA_NOWAIT); 308246713Skib else 309246713Skib error = bus_dmamap_load(request->dma->data_tag, request->dma->data_map, 310246713Skib request->data, request->bytecount, 311246713Skib ch->dma.setprd, &dspa, BUS_DMA_NOWAIT); 312246713Skib if (error || (error = dspa.error)) { 313198717Smav device_printf(request->parent, "FAILURE - load data\n"); 314178067Ssos goto error; 315178067Ssos } 316178067Ssos 317178067Ssos if (entries) 318178067Ssos *entries = dspa.nsegs; 319178067Ssos 320178278Ssos bus_dmamap_sync(request->dma->sg_tag, request->dma->sg_map, 321178067Ssos BUS_DMASYNC_PREWRITE); 322178278Ssos bus_dmamap_sync(request->dma->data_tag, request->dma->data_map, 323178067Ssos (request->flags & ATA_R_READ) ? 324178067Ssos BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); 32595010Ssos return 0; 326178067Ssos 327178067Ssoserror: 328178067Ssos ata_dmaunload(request); 329178067Ssos return EIO; 33045095Ssos} 33145095Ssos 33266070Ssosint 333178067Ssosata_dmaunload(struct ata_request *request) 33445095Ssos{ 335178067Ssos ATA_DEBUG_RQ(request, "dmaunload"); 336119404Ssos 337178278Ssos if (request->dma) { 338178278Ssos bus_dmamap_sync(request->dma->sg_tag, request->dma->sg_map, 339145818Ssos BUS_DMASYNC_POSTWRITE); 340178278Ssos bus_dmamap_sync(request->dma->data_tag, request->dma->data_map, 341178067Ssos (request->flags & ATA_R_READ) ? 342145818Ssos BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); 343145818Ssos 344178278Ssos bus_dmamap_unload(request->dma->data_tag, request->dma->data_map); 345178278Ssos request->dma = NULL; 346145818Ssos } 347112791Ssos return 0; 34845095Ssos} 349