1 /* drm_dma.c -- DMA IOCTL and function support -*- linux-c -*-
2 * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
4 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice (including the next
16 * paragraph) shall be included in all copies or substantial portions of the
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
28 * Rickard E. (Rik) Faith <faith@valinux.com>
29 * Gareth Hughes <gareth@valinux.com>
31 * $FreeBSD: src/sys/dev/drm/drm_dma.h,v 1.5.2.1 2003/04/26 07:05:28 anholt Exp $
32 * $DragonFly: src/sys/dev/drm/drm_dma.h,v 1.8 2006/09/03 20:29:15 dillon Exp $
35 #include "dev/drm/drmP.h"
37 #ifndef __HAVE_DMA_WAITQUEUE
38 #define __HAVE_DMA_WAITQUEUE 0
40 #ifndef __HAVE_DMA_RECLAIM
41 #define __HAVE_DMA_RECLAIM 0
43 #ifndef __HAVE_SHARED_IRQ
44 #define __HAVE_SHARED_IRQ 0
49 int DRM(dma_setup
)( drm_device_t
*dev
)
53 dev
->dma
= DRM(alloc
)( sizeof(*dev
->dma
), DRM_MEM_DRIVER
);
55 return DRM_ERR(ENOMEM
);
57 memset( dev
->dma
, 0, sizeof(*dev
->dma
) );
59 for ( i
= 0 ; i
<= DRM_MAX_ORDER
; i
++ )
60 memset(&dev
->dma
->bufs
[i
], 0, sizeof(dev
->dma
->bufs
[0]));
65 void DRM(dma_takedown
)(drm_device_t
*dev
)
67 drm_device_dma_t
*dma
= dev
->dma
;
72 /* Clear dma buffers */
73 for (i
= 0; i
<= DRM_MAX_ORDER
; i
++) {
74 if (dma
->bufs
[i
].seg_count
) {
75 DRM_DEBUG("order %d: buf_count = %d,"
78 dma
->bufs
[i
].buf_count
,
79 dma
->bufs
[i
].seg_count
);
80 for (j
= 0; j
< dma
->bufs
[i
].seg_count
; j
++) {
81 DRM(free
)((void *)dma
->bufs
[i
].seglist
[j
],
82 dma
->bufs
[i
].buf_size
,
85 DRM(free
)(dma
->bufs
[i
].seglist
,
86 dma
->bufs
[i
].seg_count
87 * sizeof(*dma
->bufs
[0].seglist
),
90 if(dma
->bufs
[i
].buf_count
) {
91 for(j
= 0; j
< dma
->bufs
[i
].buf_count
; j
++) {
92 if(dma
->bufs
[i
].buflist
[j
].dev_private
) {
93 DRM(free
)(dma
->bufs
[i
].buflist
[j
].dev_private
,
94 dma
->bufs
[i
].buflist
[j
].dev_priv_size
,
98 DRM(free
)(dma
->bufs
[i
].buflist
,
99 dma
->bufs
[i
].buf_count
*
100 sizeof(*dma
->bufs
[0].buflist
),
106 DRM(free
)(dma
->buflist
,
107 dma
->buf_count
* sizeof(*dma
->buflist
),
112 DRM(free
)(dma
->pagelist
,
113 dma
->page_count
* sizeof(*dma
->pagelist
),
116 DRM(free
)(dev
->dma
, sizeof(*dev
->dma
), DRM_MEM_DRIVER
);
121 void DRM(free_buffer
)(drm_device_t
*dev
, drm_buf_t
*buf
)
130 #if !__HAVE_DMA_RECLAIM
131 void DRM(reclaim_buffers
)(drm_device_t
*dev
, DRMFILE filp
)
133 drm_device_dma_t
*dma
= dev
->dma
;
137 for (i
= 0; i
< dma
->buf_count
; i
++) {
138 if (dma
->buflist
[i
]->filp
== filp
) {
139 switch (dma
->buflist
[i
]->list
) {
141 DRM(free_buffer
)(dev
, dma
->buflist
[i
]);
144 dma
->buflist
[i
]->list
= DRM_LIST_RECLAIM
;
147 /* Buffer already on hardware. */
158 int DRM(irq_install
)( drm_device_t
*dev
, int irq
)
163 return DRM_ERR(EINVAL
);
168 return DRM_ERR(EBUSY
);
173 DRM_DEBUG( "%s: irq=%d\n", __func__
, irq
);
175 dev
->context_flag
= 0;
177 dev
->dma
->next_buffer
= NULL
;
178 dev
->dma
->this_buffer
= NULL
;
180 #if __HAVE_DMA_IRQ_BH
181 TASK_INIT(&dev
->task
, 0, DRM(dma_immediate_bh
), dev
);
184 #if __HAVE_VBL_IRQ && 0 /* disabled */
185 DRM_SPININIT( dev
->vbl_lock
, "vblsig" );
186 TAILQ_INIT( &dev
->vbl_sig_list
);
189 /* Before installing handler */
190 DRM(driver_irq_preinstall
)( dev
);
192 /* Install handler */
194 #if defined(__DragonFly__) || defined(__FreeBSD__)
195 dev
->irqr
= bus_alloc_resource(dev
->device
, SYS_RES_IRQ
, &dev
->irqrid
,
196 0, ~0, 1, RF_SHAREABLE
);
198 #elif defined(__NetBSD__)
199 if (pci_intr_map(&dev
->pa
, &dev
->ih
) != 0) {
208 #if defined(__DragonFly__) || defined(__FreeBSD__)
209 #if defined(__DragonFly__) || __FreeBSD_version < 500000
210 retcode
= bus_setup_intr(dev
->device
, dev
->irqr
, 0,
211 DRM(dma_service
), dev
, &dev
->irqh
, NULL
);
213 retcode
= bus_setup_intr(dev
->device
, dev
->irqr
, INTR_MPSAFE
,
214 DRM(dma_service
), dev
, &dev
->irqh
, NULL
);
217 #elif defined(__NetBSD__)
218 dev
->irqh
= pci_intr_establish(&dev
->pa
.pa_pc
, dev
->ih
, IPL_TTY
,
219 (int (*)(DRM_IRQ_ARGS
))DRM(dma_service
), dev
);
223 #if defined(__DragonFly__) || defined(__FreeBSD__)
224 bus_release_resource(dev
->device
, SYS_RES_IRQ
, dev
->irqrid
, dev
->irqr
);
232 /* After installing handler */
233 DRM(driver_irq_postinstall
)( dev
);
238 int DRM(irq_uninstall
)( drm_device_t
*dev
)
245 irqrid
= dev
->irqrid
;
251 return DRM_ERR(EINVAL
);
253 DRM_DEBUG( "%s: irq=%d\n", __func__
, irq
);
255 DRM(driver_irq_uninstall
)( dev
);
257 #if defined(__DragonFly__) || defined(__FreeBSD__)
258 bus_teardown_intr(dev
->device
, dev
->irqr
, dev
->irqh
);
259 bus_release_resource(dev
->device
, SYS_RES_IRQ
, irqrid
, dev
->irqr
);
260 #elif defined(__NetBSD__)
261 pci_intr_disestablish(&dev
->pa
.pa_pc
, dev
->irqh
);
267 int DRM(control
)( DRM_IOCTL_ARGS
)
272 DRM_COPY_FROM_USER_IOCTL( ctl
, (drm_control_t
*) data
, sizeof(ctl
) );
274 switch ( ctl
.func
) {
275 case DRM_INST_HANDLER
:
276 return DRM(irq_install
)( dev
, ctl
.irq
);
277 case DRM_UNINST_HANDLER
:
278 return DRM(irq_uninstall
)( dev
);
280 return DRM_ERR(EINVAL
);
285 int DRM(wait_vblank
)( DRM_IOCTL_ARGS
)
288 drm_wait_vblank_t vblwait
;
293 return DRM_ERR(EINVAL
);
295 DRM_COPY_FROM_USER_IOCTL( vblwait
, (drm_wait_vblank_t
*)data
,
298 if (vblwait
.request
.type
& _DRM_VBLANK_RELATIVE
) {
299 vblwait
.request
.sequence
+= atomic_read(&dev
->vbl_received
);
300 vblwait
.request
.type
&= ~_DRM_VBLANK_RELATIVE
;
303 flags
= vblwait
.request
.type
& _DRM_VBLANK_FLAGS_MASK
;
304 if (flags
& _DRM_VBLANK_SIGNAL
) {
306 drm_vbl_sig_t
*vbl_sig
= DRM_MALLOC(sizeof(drm_vbl_sig_t
));
309 bzero(vbl_sig
, sizeof(*vbl_sig
));
311 vbl_sig
->sequence
= vblwait
.request
.sequence
;
312 vbl_sig
->signo
= vblwait
.request
.signal
;
313 vbl_sig
->pid
= DRM_CURRENTPID
;
315 vblwait
.reply
.sequence
= atomic_read(&dev
->vbl_received
);
317 DRM_SPINLOCK(&dev
->vbl_lock
);
318 TAILQ_INSERT_HEAD(&dev
->vbl_sig_list
, vbl_sig
, link
);
319 DRM_SPINUNLOCK(&dev
->vbl_lock
);
324 ret
= DRM(vblank_wait
)(dev
, &vblwait
.request
.sequence
);
327 vblwait
.reply
.tval_sec
= now
.tv_sec
;
328 vblwait
.reply
.tval_usec
= now
.tv_usec
;
331 DRM_COPY_TO_USER_IOCTL( (drm_wait_vblank_t
*)data
, vblwait
,
337 void DRM(vbl_send_signals
)(drm_device_t
*dev
)
342 void DRM(vbl_send_signals
)( drm_device_t
*dev
)
344 drm_vbl_sig_t
*vbl_sig
;
345 unsigned int vbl_seq
= atomic_read( &dev
->vbl_received
);
348 DRM_SPINLOCK(&dev
->vbl_lock
);
351 vbl_sig
= TAILQ_FIRST(&dev
->vbl_sig_list
);
352 while (vbl_sig
!= NULL
) {
353 drm_vbl_sig_t
*next
= TAILQ_NEXT(vbl_sig
, link
);
355 if ( ( vbl_seq
- vbl_sig
->sequence
) <= (1<<23) ) {
356 p
= pfind(vbl_sig
->pid
);
358 ksignal(p
, vbl_sig
->signo
);
360 TAILQ_REMOVE(&dev
->vbl_sig_list
, vbl_sig
, link
);
361 DRM_SPINUNLOCK(&dev
->vbl_lock
);
362 DRM_FREE(vbl_sig
,sizeof(*vbl_sig
));
368 DRM_SPINUNLOCK(&dev
->vbl_lock
);
372 #endif /* __HAVE_VBL_IRQ */
376 int DRM(control
)( DRM_IOCTL_ARGS
)
380 DRM_COPY_FROM_USER_IOCTL( ctl
, (drm_control_t
*) data
, sizeof(ctl
) );
382 switch ( ctl
.func
) {
383 case DRM_INST_HANDLER
:
384 case DRM_UNINST_HANDLER
:
387 return DRM_ERR(EINVAL
);
391 #endif /* __HAVE_DMA_IRQ */
393 #endif /* __HAVE_DMA */