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ata-dma.c (174576) ata-dma.c (178067)
1/*-
1/*-
2 * Copyright (c) 1998 - 2007 S�ren Schmidt <sos@FreeBSD.org>
2 * Copyright (c) 1998 - 2008 S�ren Schmidt <sos@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.

--- 9 unchanged lines hidden (view full) ---

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.
25 */
26
27#include <sys/cdefs.h>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.

--- 9 unchanged lines hidden (view full) ---

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.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/dev/ata/ata-dma.c 174576 2007-12-13 11:47:36Z sos $");
28__FBSDID("$FreeBSD: head/sys/dev/ata/ata-dma.c 178067 2008-04-10 13:05:05Z sos $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/ata.h>
33#include <sys/kernel.h>
34#include <sys/endian.h>
35#include <sys/malloc.h>
36#include <sys/lock.h>
37#include <sys/sema.h>
38#include <sys/taskqueue.h>
39#include <vm/uma.h>
40#include <sys/bus.h>
41#include <machine/bus.h>
42#include <sys/rman.h>
43#include <dev/pci/pcivar.h>
44#include <dev/ata/ata-all.h>
45#include <dev/ata/ata-pci.h>
46
47/* prototypes */
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/ata.h>
33#include <sys/kernel.h>
34#include <sys/endian.h>
35#include <sys/malloc.h>
36#include <sys/lock.h>
37#include <sys/sema.h>
38#include <sys/taskqueue.h>
39#include <vm/uma.h>
40#include <sys/bus.h>
41#include <machine/bus.h>
42#include <sys/rman.h>
43#include <dev/pci/pcivar.h>
44#include <dev/ata/ata-all.h>
45#include <dev/ata/ata-pci.h>
46
47/* prototypes */
48static void ata_dmaalloc(device_t);
49static void ata_dmafree(device_t);
50static void ata_dmasetprd(void *, bus_dma_segment_t *, int, int);
51static int ata_dmaload(device_t, caddr_t, int32_t, int, void *, int *);
52static int ata_dmaunload(device_t);
48static void ata_dmaalloc(device_t dev);
49static void ata_dmafree(device_t dev);
50static void ata_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs, int error);
51static int ata_dmaload(struct ata_request *request, void *addr, int *nsegs);
52static int ata_dmaunload(struct ata_request *request);
53
54/* local vars */
55static MALLOC_DEFINE(M_ATADMA, "ata_dma", "ATA driver DMA");
56
57/* misc defines */
58#define MAXTABSZ PAGE_SIZE
59#define MAXWSPCSZ PAGE_SIZE*2
60
61struct ata_dc_cb_args {
62 bus_addr_t maddr;
63 int error;
64};
65
66void
67ata_dmainit(device_t dev)
68{
69 struct ata_channel *ch = device_get_softc(dev);
70
53
54/* local vars */
55static MALLOC_DEFINE(M_ATADMA, "ata_dma", "ATA driver DMA");
56
57/* misc defines */
58#define MAXTABSZ PAGE_SIZE
59#define MAXWSPCSZ PAGE_SIZE*2
60
61struct ata_dc_cb_args {
62 bus_addr_t maddr;
63 int error;
64};
65
66void
67ata_dmainit(device_t dev)
68{
69 struct ata_channel *ch = device_get_softc(dev);
70
71 if ((ch->dma = malloc(sizeof(struct ata_dma), M_ATADMA, M_NOWAIT|M_ZERO))) {
72 ch->dma->alloc = ata_dmaalloc;
73 ch->dma->free = ata_dmafree;
74 ch->dma->setprd = ata_dmasetprd;
75 ch->dma->load = ata_dmaload;
76 ch->dma->unload = ata_dmaunload;
77 ch->dma->alignment = 2;
78 ch->dma->boundary = 65536;
79 ch->dma->segsize = 128 * DEV_BSIZE;
80 ch->dma->max_iosize = 128 * DEV_BSIZE;
81 ch->dma->max_address = BUS_SPACE_MAXADDR_32BIT;
82 }
71 ch->dma.alloc = ata_dmaalloc;
72 ch->dma.free = ata_dmafree;
73 ch->dma.setprd = ata_dmasetprd;
74 ch->dma.load = ata_dmaload;
75 ch->dma.unload = ata_dmaunload;
76 ch->dma.alignment = 2;
77 ch->dma.boundary = 65536;
78 ch->dma.segsize = 63536;
79 ch->dma.max_iosize = 128 * DEV_BSIZE;
80 ch->dma.max_address = BUS_SPACE_MAXADDR_32BIT;
83}
84
85static void
86ata_dmasetupc_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
87{
81}
82
83static void
84ata_dmasetupc_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
85{
88 struct ata_dc_cb_args *cba = (struct ata_dc_cb_args *)xsc;
86 struct ata_dc_cb_args *dcba = (struct ata_dc_cb_args *)xsc;
89
87
90 if (!(cba->error = error))
91 cba->maddr = segs[0].ds_addr;
88 if (!(dcba->error = error))
89 dcba->maddr = segs[0].ds_addr;
92}
93
94static void
95ata_dmaalloc(device_t dev)
96{
97 struct ata_channel *ch = device_get_softc(dev);
90}
91
92static void
93ata_dmaalloc(device_t dev)
94{
95 struct ata_channel *ch = device_get_softc(dev);
98 struct ata_dc_cb_args ccba;
96 struct ata_dc_cb_args dcba;
99
97
100 if (bus_dma_tag_create(bus_get_dma_tag(dev), ch->dma->alignment, 0,
101 ch->dma->max_address, BUS_SPACE_MAXADDR,
102 NULL, NULL, ch->dma->max_iosize,
103 ATA_DMA_ENTRIES, ch->dma->segsize,
104 0, NULL, NULL, &ch->dma->dmatag))
98 if (bus_dma_tag_create(bus_get_dma_tag(dev), ch->dma.alignment, 0,
99 ch->dma.max_address, BUS_SPACE_MAXADDR,
100 NULL, NULL, ch->dma.max_iosize,
101 ATA_DMA_ENTRIES, ch->dma.segsize,
102 0, NULL, NULL, &ch->dma.dmatag))
105 goto error;
106
103 goto error;
104
107 if (bus_dma_tag_create(ch->dma->dmatag, PAGE_SIZE, PAGE_SIZE,
108 ch->dma->max_address, BUS_SPACE_MAXADDR,
109 NULL, NULL, MAXTABSZ, 1, MAXTABSZ,
110 0, NULL, NULL, &ch->dma->sg_tag))
111 goto error;
112
113 if (bus_dma_tag_create(ch->dma->dmatag,ch->dma->alignment,ch->dma->boundary,
114 ch->dma->max_address, BUS_SPACE_MAXADDR,
115 NULL, NULL, ch->dma->max_iosize,
116 ATA_DMA_ENTRIES, ch->dma->segsize,
117 0, NULL, NULL, &ch->dma->data_tag))
118 goto error;
119
120 if (bus_dmamem_alloc(ch->dma->sg_tag, (void **)&ch->dma->sg, 0,
121 &ch->dma->sg_map))
122 goto error;
123
124 if (bus_dmamap_load(ch->dma->sg_tag, ch->dma->sg_map, ch->dma->sg,
125 MAXTABSZ, ata_dmasetupc_cb, &ccba, 0) || ccba.error) {
126 bus_dmamem_free(ch->dma->sg_tag, ch->dma->sg, ch->dma->sg_map);
127 goto error;
128 }
129 ch->dma->sg_bus = ccba.maddr;
130
131 if (bus_dmamap_create(ch->dma->data_tag, 0, &ch->dma->data_map))
132 goto error;
133
134 if (bus_dma_tag_create(ch->dma->dmatag, PAGE_SIZE, 64 * 1024,
135 ch->dma->max_address, BUS_SPACE_MAXADDR,
105 if (bus_dma_tag_create(ch->dma.dmatag, PAGE_SIZE, 64 * 1024,
106 ch->dma.max_address, BUS_SPACE_MAXADDR,
136 NULL, NULL, MAXWSPCSZ, 1, MAXWSPCSZ,
107 NULL, NULL, MAXWSPCSZ, 1, MAXWSPCSZ,
137 0, NULL, NULL, &ch->dma->work_tag))
108 0, NULL, NULL, &ch->dma.work_tag))
138 goto error;
139
109 goto error;
110
140 if (bus_dmamem_alloc(ch->dma->work_tag, (void **)&ch->dma->work, 0,
141 &ch->dma->work_map))
111 if (bus_dmamem_alloc(ch->dma.work_tag, (void **)&ch->dma.work, 0,
112 &ch->dma.work_map))
142 goto error;
143
113 goto error;
114
144 if (bus_dmamap_load(ch->dma->work_tag, ch->dma->work_map,ch->dma->work,
145 MAXWSPCSZ, ata_dmasetupc_cb, &ccba, 0) || ccba.error) {
146 bus_dmamem_free(ch->dma->work_tag,ch->dma->work, ch->dma->work_map);
115 if (bus_dmamap_load(ch->dma.work_tag, ch->dma.work_map ,ch->dma.work,
116 MAXWSPCSZ, ata_dmasetupc_cb, &dcba, BUS_DMA_NOWAIT) ||
117 dcba.error) {
118 bus_dmamem_free(ch->dma.work_tag, ch->dma.work, ch->dma.work_map);
147 goto error;
148 }
119 goto error;
120 }
149 ch->dma->work_bus = ccba.maddr;
121 ch->dma.work_bus = dcba.maddr;
150
151 return;
152
153error:
154 device_printf(dev, "WARNING - DMA allocation failed, disabling DMA\n");
155 ata_dmafree(dev);
122
123 return;
124
125error:
126 device_printf(dev, "WARNING - DMA allocation failed, disabling DMA\n");
127 ata_dmafree(dev);
156 free(ch->dma, M_ATADMA);
157 ch->dma = NULL;
158}
159
160static void
161ata_dmafree(device_t dev)
162{
163 struct ata_channel *ch = device_get_softc(dev);
164
128}
129
130static void
131ata_dmafree(device_t dev)
132{
133 struct ata_channel *ch = device_get_softc(dev);
134
165 if (ch->dma->work_bus) {
166 bus_dmamap_unload(ch->dma->work_tag, ch->dma->work_map);
167 bus_dmamem_free(ch->dma->work_tag, ch->dma->work, ch->dma->work_map);
168 ch->dma->work_bus = 0;
169 ch->dma->work_map = NULL;
170 ch->dma->work = NULL;
135 if (ch->dma.work_bus) {
136 bus_dmamap_unload(ch->dma.work_tag, ch->dma.work_map);
137 bus_dmamem_free(ch->dma.work_tag, ch->dma.work, ch->dma.work_map);
138 ch->dma.work_bus = 0;
139 ch->dma.work_map = NULL;
140 ch->dma.work = NULL;
171 }
141 }
172 if (ch->dma->work_tag) {
173 bus_dma_tag_destroy(ch->dma->work_tag);
174 ch->dma->work_tag = NULL;
142 if (ch->dma.work_tag) {
143 bus_dma_tag_destroy(ch->dma.work_tag);
144 ch->dma.work_tag = NULL;
175 }
145 }
176 if (ch->dma->sg_bus) {
177 bus_dmamap_unload(ch->dma->sg_tag, ch->dma->sg_map);
178 bus_dmamem_free(ch->dma->sg_tag, ch->dma->sg, ch->dma->sg_map);
179 ch->dma->sg_bus = 0;
180 ch->dma->sg_map = NULL;
181 ch->dma->sg = NULL;
146 if (ch->dma.dmatag) {
147 bus_dma_tag_destroy(ch->dma.dmatag);
148 ch->dma.dmatag = NULL;
182 }
149 }
183 if (ch->dma->data_map) {
184 bus_dmamap_destroy(ch->dma->data_tag, ch->dma->data_map);
185 ch->dma->data_map = NULL;
186 }
187 if (ch->dma->sg_tag) {
188 bus_dma_tag_destroy(ch->dma->sg_tag);
189 ch->dma->sg_tag = NULL;
190 }
191 if (ch->dma->data_tag) {
192 bus_dma_tag_destroy(ch->dma->data_tag);
193 ch->dma->data_tag = NULL;
194 }
195 if (ch->dma->dmatag) {
196 bus_dma_tag_destroy(ch->dma->dmatag);
197 ch->dma->dmatag = NULL;
198 }
199}
200
201static void
202ata_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
203{
204 struct ata_dmasetprd_args *args = xsc;
205 struct ata_dma_prdentry *prd = args->dmatab;
206 int i;

--- 6 unchanged lines hidden (view full) ---

213 prd[i].count = htole32(segs[i].ds_len);
214 }
215 prd[i - 1].count |= htole32(ATA_DMA_EOT);
216 KASSERT(nsegs <= ATA_DMA_ENTRIES, ("too many DMA segment entries\n"));
217 args->nsegs = nsegs;
218}
219
220static int
150}
151
152static void
153ata_dmasetprd(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
154{
155 struct ata_dmasetprd_args *args = xsc;
156 struct ata_dma_prdentry *prd = args->dmatab;
157 int i;

--- 6 unchanged lines hidden (view full) ---

164 prd[i].count = htole32(segs[i].ds_len);
165 }
166 prd[i - 1].count |= htole32(ATA_DMA_EOT);
167 KASSERT(nsegs <= ATA_DMA_ENTRIES, ("too many DMA segment entries\n"));
168 args->nsegs = nsegs;
169}
170
171static int
221ata_dmaload(device_t dev, caddr_t data, int32_t count, int dir,
222 void *addr, int *entries)
172ata_dmaload(struct ata_request *request, void *addr, int *entries)
223{
173{
224 struct ata_channel *ch = device_get_softc(dev);
225 struct ata_dmasetprd_args cba;
174 struct ata_channel *ch = device_get_softc(request->parent);
175 struct ata_dc_cb_args dcba;
176 struct ata_dmasetprd_args dspa;
226 int error;
227
177 int error;
178
228 if (ch->dma->flags & ATA_DMA_LOADED) {
229 device_printf(dev, "FAILURE - already active DMA on this device\n");
179 ATA_DEBUG_RQ(request, "dmaload");
180
181 if (request->dma.cur_iosize) {
182 device_printf(request->dev,
183 "FAILURE - already active DMA on this device\n");
230 return EIO;
231 }
184 return EIO;
185 }
232 if (!count) {
233 device_printf(dev, "FAILURE - zero length DMA transfer attempted\n");
186 if (!request->bytecount) {
187 device_printf(request->dev,
188 "FAILURE - zero length DMA transfer attempted\n");
234 return EIO;
235 }
189 return EIO;
190 }
236 if (((uintptr_t)data & (ch->dma->alignment - 1)) ||
237 (count & (ch->dma->alignment - 1))) {
238 device_printf(dev, "FAILURE - non aligned DMA transfer attempted\n");
191 if (((uintptr_t)(request->data) & (ch->dma.alignment - 1)) ||
192 (request->bytecount & (ch->dma.alignment - 1))) {
193 device_printf(request->dev,
194 "FAILURE - non aligned DMA transfer attempted\n");
239 return EIO;
240 }
195 return EIO;
196 }
241 if (count > ch->dma->max_iosize) {
242 device_printf(dev, "FAILURE - oversized DMA transfer attempt %d > %d\n",
243 count, ch->dma->max_iosize);
197 if (request->bytecount > ch->dma.max_iosize) {
198 device_printf(request->dev,
199 "FAILURE - oversized DMA transfer attempt %d > %d\n",
200 request->bytecount, ch->dma.max_iosize);
244 return EIO;
245 }
246
201 return EIO;
202 }
203
247 cba.dmatab = addr;
204 if (bus_dma_tag_create(ch->dma.dmatag, PAGE_SIZE, PAGE_SIZE,
205 ch->dma.max_address, BUS_SPACE_MAXADDR,
206 NULL, NULL, MAXTABSZ, 1, MAXTABSZ,
207 0, NULL, NULL, &request->dma.sg_tag)) {
208 device_printf(request->dev, "FAILURE - create sg_tag\n");
209 goto error;
210 }
248
211
249 if ((error = bus_dmamap_load(ch->dma->data_tag, ch->dma->data_map,
250 data, count, ch->dma->setprd, &cba,
251 BUS_DMA_NOWAIT)) || (error = cba.error))
252 return error;
212 if (bus_dmamem_alloc(request->dma.sg_tag, (void **)&request->dma.sg, 0,
213 &request->dma.sg_map)) {
214 device_printf(request->dev, "FAILURE - alloc sg_map\n");
215 goto error;
216 }
253
217
254 *entries = cba.nsegs;
218 if (bus_dmamap_load(request->dma.sg_tag, request->dma.sg_map,
219 request->dma.sg, MAXTABSZ,
220 ata_dmasetupc_cb, &dcba, BUS_DMA_NOWAIT) || dcba.error){
221 bus_dmamem_free(request->dma.sg_tag,
222 request->dma.sg, request->dma.sg_map);
223 device_printf(request->dev, "FAILURE - load sg\n");
224 goto error;
225 }
226 request->dma.sg_bus = dcba.maddr;
255
227
256 bus_dmamap_sync(ch->dma->sg_tag, ch->dma->sg_map, BUS_DMASYNC_PREWRITE);
228 if (bus_dma_tag_create(ch->dma.dmatag, ch->dma.alignment, ch->dma.boundary,
229 ch->dma.max_address, BUS_SPACE_MAXADDR,
230 NULL, NULL, ch->dma.max_iosize,
231 ATA_DMA_ENTRIES, ch->dma.segsize,
232 BUS_DMA_ALLOCNOW, NULL, NULL,
233 &request->dma.data_tag)) {
234 device_printf(request->dev, "FAILURE - create data_tag\n");
235 goto error;
236 }
257
237
258 bus_dmamap_sync(ch->dma->data_tag, ch->dma->data_map,
259 dir ? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
238 if (bus_dmamap_create(request->dma.data_tag, 0, &request->dma.data_map)) {
239 device_printf(request->dev, "FAILURE - create data_map\n");
240 goto error;
241 }
260
242
261 ch->dma->cur_iosize = count;
262 ch->dma->flags = dir ? (ATA_DMA_LOADED | ATA_DMA_READ) : ATA_DMA_LOADED;
243 if (addr)
244 dspa.dmatab = addr;
245 else
246 dspa.dmatab = request->dma.sg;
247
248 if ((error = bus_dmamap_load(request->dma.data_tag, request->dma.data_map,
249 request->data, request->bytecount,
250 ch->dma.setprd, &dspa, BUS_DMA_NOWAIT)) ||
251 (error = dspa.error)) {
252 device_printf(request->dev, "FAILURE - load data\n");
253 goto error;
254 }
255
256 if (entries)
257 *entries = dspa.nsegs;
258
259 bus_dmamap_sync(request->dma.sg_tag, request->dma.sg_map,
260 BUS_DMASYNC_PREWRITE);
261
262 bus_dmamap_sync(request->dma.data_tag, request->dma.data_map,
263 (request->flags & ATA_R_READ) ?
264 BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE);
265
266 request->dma.cur_iosize = request->bytecount;
267
263 return 0;
268 return 0;
269
270error:
271 ata_dmaunload(request);
272 return EIO;
264}
265
266int
273}
274
275int
267ata_dmaunload(device_t dev)
276ata_dmaunload(struct ata_request *request)
268{
277{
269 struct ata_channel *ch = device_get_softc(dev);
278 ATA_DEBUG_RQ(request, "dmaunload");
270
279
271 if (ch->dma->flags & ATA_DMA_LOADED) {
272 bus_dmamap_sync(ch->dma->sg_tag, ch->dma->sg_map,
280 if (request->dma.cur_iosize) {
281 bus_dmamap_sync(request->dma.sg_tag, request->dma.sg_map,
273 BUS_DMASYNC_POSTWRITE);
274
282 BUS_DMASYNC_POSTWRITE);
283
275 bus_dmamap_sync(ch->dma->data_tag, ch->dma->data_map,
276 (ch->dma->flags & ATA_DMA_READ) ?
284 bus_dmamap_sync(request->dma.data_tag, request->dma.data_map,
285 (request->flags & ATA_R_READ) ?
277 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
286 BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
278 bus_dmamap_unload(ch->dma->data_tag, ch->dma->data_map);
287 bus_dmamap_unload(request->dma.data_tag, request->dma.data_map);
279
288
280 ch->dma->cur_iosize = 0;
281 ch->dma->flags &= ~ATA_DMA_LOADED;
289 request->dma.cur_iosize = 0;
282 }
290 }
291 if (request->dma.data_map) {
292 bus_dmamap_destroy(request->dma.data_tag, request->dma.data_map);
293 request->dma.data_map = NULL;
294 }
295 if (request->dma.data_tag) {
296 bus_dma_tag_destroy(request->dma.data_tag);
297 request->dma.data_tag = NULL;
298 }
299 if (request->dma.sg_bus) {
300 bus_dmamap_unload(request->dma.sg_tag, request->dma.sg_map);
301 bus_dmamem_free(request->dma.sg_tag, request->dma.sg,
302 request->dma.sg_map);
303 request->dma.sg = NULL;
304 request->dma.sg_bus = 0;
305 request->dma.sg_map = NULL;
306 }
307 if (request->dma.sg_tag) {
308 bus_dma_tag_destroy(request->dma.sg_tag);
309 request->dma.sg_tag = NULL;
310 }
283 return 0;
284}
311 return 0;
312}