2 * Copyright (c) 1998 - 2008 Søren Schmidt <sos@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer,
10 * without modification, immediately at the beginning of the file.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/endian.h>
35 #include <sys/malloc.h>
38 #include <sys/taskqueue.h>
41 #include <machine/bus.h>
43 #include <dev/ata/ata-all.h>
46 static void ata_dmasetupc_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int error);
47 static void ata_dmaalloc(device_t dev);
48 static void ata_dmafree(device_t dev);
49 static void ata_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs, int error);
50 static int ata_dmaload(struct ata_request *request, void *addr, int *nsegs);
51 static int ata_dmaunload(struct ata_request *request);
54 static MALLOC_DEFINE(M_ATADMA, "ata_dma", "ATA driver DMA");
57 #define MAXTABSZ PAGE_SIZE
58 #define MAXWSPCSZ PAGE_SIZE*2
60 struct ata_dc_cb_args {
66 ata_dmainit(device_t dev)
68 struct ata_channel *ch = device_get_softc(dev);
69 struct ata_dc_cb_args dcba;
71 if (ch->dma.alloc == NULL)
72 ch->dma.alloc = ata_dmaalloc;
73 if (ch->dma.free == NULL)
74 ch->dma.free = ata_dmafree;
75 if (ch->dma.setprd == NULL)
76 ch->dma.setprd = ata_dmasetprd;
77 if (ch->dma.load == NULL)
78 ch->dma.load = ata_dmaload;
79 if (ch->dma.unload == NULL)
80 ch->dma.unload = ata_dmaunload;
81 if (ch->dma.alignment == 0)
82 ch->dma.alignment = 2;
83 if (ch->dma.boundary == 0)
84 ch->dma.boundary = 65536;
85 if (ch->dma.segsize == 0)
86 ch->dma.segsize = 65536;
87 if (ch->dma.max_iosize == 0)
88 ch->dma.max_iosize = MIN((ATA_DMA_ENTRIES - 1) * PAGE_SIZE, MAXPHYS);
89 if (ch->dma.max_address == 0)
90 ch->dma.max_address = BUS_SPACE_MAXADDR_32BIT;
91 if (ch->dma.dma_slots == 0)
92 ch->dma.dma_slots = 1;
94 if (bus_dma_tag_create(bus_get_dma_tag(dev), ch->dma.alignment, 0,
95 ch->dma.max_address, BUS_SPACE_MAXADDR,
96 NULL, NULL, ch->dma.max_iosize,
97 ATA_DMA_ENTRIES, ch->dma.segsize,
98 0, NULL, NULL, &ch->dma.dmatag))
101 if (bus_dma_tag_create(ch->dma.dmatag, PAGE_SIZE, 64 * 1024,
102 ch->dma.max_address, BUS_SPACE_MAXADDR,
103 NULL, NULL, MAXWSPCSZ, 1, MAXWSPCSZ,
104 0, NULL, NULL, &ch->dma.work_tag))
107 if (bus_dmamem_alloc(ch->dma.work_tag, (void **)&ch->dma.work,
108 BUS_DMA_WAITOK | BUS_DMA_COHERENT,
112 if (bus_dmamap_load(ch->dma.work_tag, ch->dma.work_map, ch->dma.work,
113 MAXWSPCSZ, ata_dmasetupc_cb, &dcba, 0) ||
115 bus_dmamem_free(ch->dma.work_tag, ch->dma.work, ch->dma.work_map);
118 ch->dma.work_bus = dcba.maddr;
122 device_printf(dev, "WARNING - DMA initialization failed, disabling DMA\n");
127 ata_dmafini(device_t dev)
129 struct ata_channel *ch = device_get_softc(dev);
131 if (ch->dma.work_bus) {
132 bus_dmamap_unload(ch->dma.work_tag, ch->dma.work_map);
133 bus_dmamem_free(ch->dma.work_tag, ch->dma.work, ch->dma.work_map);
134 ch->dma.work_bus = 0;
135 ch->dma.work_map = NULL;
138 if (ch->dma.work_tag) {
139 bus_dma_tag_destroy(ch->dma.work_tag);
140 ch->dma.work_tag = NULL;
142 if (ch->dma.dmatag) {
143 bus_dma_tag_destroy(ch->dma.dmatag);
144 ch->dma.dmatag = NULL;
149 ata_dmasetupc_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
151 struct ata_dc_cb_args *dcba = (struct ata_dc_cb_args *)xsc;
153 if (!(dcba->error = error))
154 dcba->maddr = segs[0].ds_addr;
158 ata_dmaalloc(device_t dev)
160 struct ata_channel *ch = device_get_softc(dev);
161 struct ata_dc_cb_args dcba;
164 /* alloc and setup needed dma slots */
165 bzero(ch->dma.slot, sizeof(struct ata_dmaslot) * ATA_DMA_SLOTS);
166 for (i = 0; i < ch->dma.dma_slots; i++) {
167 struct ata_dmaslot *slot = &ch->dma.slot[i];
169 if (bus_dma_tag_create(ch->dma.dmatag, PAGE_SIZE, PAGE_SIZE,
170 ch->dma.max_address, BUS_SPACE_MAXADDR,
171 NULL, NULL, PAGE_SIZE, 1, PAGE_SIZE,
172 0, NULL, NULL, &slot->sg_tag)) {
173 device_printf(ch->dev, "FAILURE - create sg_tag\n");
177 if (bus_dmamem_alloc(slot->sg_tag, (void **)&slot->sg, BUS_DMA_WAITOK,
179 device_printf(ch->dev, "FAILURE - alloc sg_map\n");
183 if (bus_dmamap_load(slot->sg_tag, slot->sg_map, slot->sg, MAXTABSZ,
184 ata_dmasetupc_cb, &dcba, 0) || dcba.error) {
185 device_printf(ch->dev, "FAILURE - load sg\n");
188 slot->sg_bus = dcba.maddr;
190 if (bus_dma_tag_create(ch->dma.dmatag,
191 ch->dma.alignment, ch->dma.boundary,
192 ch->dma.max_address, BUS_SPACE_MAXADDR,
193 NULL, NULL, ch->dma.max_iosize,
194 ATA_DMA_ENTRIES, ch->dma.segsize,
195 BUS_DMA_ALLOCNOW, NULL, NULL, &slot->data_tag)) {
196 device_printf(ch->dev, "FAILURE - create data_tag\n");
200 if (bus_dmamap_create(slot->data_tag, 0, &slot->data_map)) {
201 device_printf(ch->dev, "FAILURE - create data_map\n");
209 device_printf(dev, "WARNING - DMA allocation failed, disabling DMA\n");
214 ata_dmafree(device_t dev)
216 struct ata_channel *ch = device_get_softc(dev);
219 /* free all dma slots */
220 for (i = 0; i < ATA_DMA_SLOTS; i++) {
221 struct ata_dmaslot *slot = &ch->dma.slot[i];
224 bus_dmamap_unload(slot->sg_tag, slot->sg_map);
228 bus_dmamem_free(slot->sg_tag, slot->sg, slot->sg_map);
229 bus_dmamap_destroy(slot->sg_tag, slot->sg_map);
233 if (slot->data_map) {
234 bus_dmamap_destroy(slot->data_tag, slot->data_map);
235 slot->data_map = NULL;
238 bus_dma_tag_destroy(slot->sg_tag);
241 if (slot->data_tag) {
242 bus_dma_tag_destroy(slot->data_tag);
243 slot->data_tag = NULL;
249 ata_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
251 struct ata_dmasetprd_args *args = xsc;
252 struct ata_dma_prdentry *prd = args->dmatab;
255 if ((args->error = error))
258 for (i = 0; i < nsegs; i++) {
259 prd[i].addr = htole32(segs[i].ds_addr);
260 prd[i].count = htole32(segs[i].ds_len);
262 prd[i - 1].count |= htole32(ATA_DMA_EOT);
263 KASSERT(nsegs <= ATA_DMA_ENTRIES, ("too many DMA segment entries\n"));
268 ata_dmaload(struct ata_request *request, void *addr, int *entries)
270 struct ata_channel *ch = device_get_softc(request->parent);
271 struct ata_dmasetprd_args dspa;
274 ATA_DEBUG_RQ(request, "dmaload");
277 device_printf(request->parent,
278 "FAILURE - already active DMA on this device\n");
281 if (!request->bytecount) {
282 device_printf(request->parent,
283 "FAILURE - zero length DMA transfer attempted\n");
286 if (request->bytecount & (ch->dma.alignment - 1)) {
287 device_printf(request->parent,
288 "FAILURE - odd-sized DMA transfer attempt %d %% %d\n",
289 request->bytecount, ch->dma.alignment);
292 if (request->bytecount > ch->dma.max_iosize) {
293 device_printf(request->parent,
294 "FAILURE - oversized DMA transfer attempt %d > %d\n",
295 request->bytecount, ch->dma.max_iosize);
299 /* set our slot. XXX SOS NCQ will change that */
300 request->dma = &ch->dma.slot[0];
305 dspa.dmatab = request->dma->sg;
308 if (request->flags & ATA_R_DATA_IN_CCB)
309 error = bus_dmamap_load_ccb(request->dma->data_tag,
310 request->dma->data_map, request->ccb,
311 ch->dma.setprd, &dspa, BUS_DMA_NOWAIT);
314 error = bus_dmamap_load(request->dma->data_tag, request->dma->data_map,
315 request->data, request->bytecount,
316 ch->dma.setprd, &dspa, BUS_DMA_NOWAIT);
317 if (error || (error = dspa.error)) {
318 device_printf(request->parent, "FAILURE - load data\n");
323 *entries = dspa.nsegs;
325 bus_dmamap_sync(request->dma->sg_tag, request->dma->sg_map,
326 BUS_DMASYNC_PREWRITE);
327 bus_dmamap_sync(request->dma->data_tag, request->dma->data_map,
328 (request->flags & ATA_R_READ) ?
329 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
333 ata_dmaunload(request);
338 ata_dmaunload(struct ata_request *request)
340 ATA_DEBUG_RQ(request, "dmaunload");
343 bus_dmamap_sync(request->dma->sg_tag, request->dma->sg_map,
344 BUS_DMASYNC_POSTWRITE);
345 bus_dmamap_sync(request->dma->data_tag, request->dma->data_map,
346 (request->flags & ATA_R_READ) ?
347 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
349 bus_dmamap_unload(request->dma->data_tag, request->dma->data_map);