1 /**************************************************************************
3 * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
29 #include "vmwgfx_drv.h"
31 #define VMW_FENCE_WRAP (1 << 24)
33 irqreturn_t
vmw_irq_handler(int irq
, void *arg
)
35 struct drm_device
*dev
= (struct drm_device
*)arg
;
36 struct vmw_private
*dev_priv
= vmw_priv(dev
);
37 uint32_t status
, masked_status
;
39 spin_lock(&dev_priv
->irq_lock
);
40 status
= inl(dev_priv
->io_start
+ VMWGFX_IRQSTATUS_PORT
);
41 masked_status
= status
& dev_priv
->irq_mask
;
42 spin_unlock(&dev_priv
->irq_lock
);
45 outl(status
, dev_priv
->io_start
+ VMWGFX_IRQSTATUS_PORT
);
50 if (masked_status
& (SVGA_IRQFLAG_ANY_FENCE
|
51 SVGA_IRQFLAG_FENCE_GOAL
)) {
52 vmw_fences_update(dev_priv
->fman
);
53 wake_up_all(&dev_priv
->fence_queue
);
56 if (masked_status
& SVGA_IRQFLAG_FIFO_PROGRESS
)
57 wake_up_all(&dev_priv
->fifo_queue
);
63 static bool vmw_fifo_idle(struct vmw_private
*dev_priv
, uint32_t seqno
)
66 return (vmw_read(dev_priv
, SVGA_REG_BUSY
) == 0);
69 void vmw_update_seqno(struct vmw_private
*dev_priv
,
70 struct vmw_fifo_state
*fifo_state
)
72 __le32 __iomem
*fifo_mem
= dev_priv
->mmio_virt
;
73 uint32_t seqno
= ioread32(fifo_mem
+ SVGA_FIFO_FENCE
);
75 if (dev_priv
->last_read_seqno
!= seqno
) {
76 dev_priv
->last_read_seqno
= seqno
;
77 vmw_marker_pull(&fifo_state
->marker_queue
, seqno
);
78 vmw_fences_update(dev_priv
->fman
);
82 bool vmw_seqno_passed(struct vmw_private
*dev_priv
,
85 struct vmw_fifo_state
*fifo_state
;
88 if (likely(dev_priv
->last_read_seqno
- seqno
< VMW_FENCE_WRAP
))
91 fifo_state
= &dev_priv
->fifo
;
92 vmw_update_seqno(dev_priv
, fifo_state
);
93 if (likely(dev_priv
->last_read_seqno
- seqno
< VMW_FENCE_WRAP
))
96 if (!(fifo_state
->capabilities
& SVGA_FIFO_CAP_FENCE
) &&
97 vmw_fifo_idle(dev_priv
, seqno
))
101 * Then check if the seqno is higher than what we've actually
102 * emitted. Then the fence is stale and signaled.
105 ret
= ((atomic_read(&dev_priv
->marker_seq
) - seqno
)
111 int vmw_fallback_wait(struct vmw_private
*dev_priv
,
116 unsigned long timeout
)
118 struct vmw_fifo_state
*fifo_state
= &dev_priv
->fifo
;
123 unsigned long end_jiffies
= jiffies
+ timeout
;
124 bool (*wait_condition
)(struct vmw_private
*, uint32_t);
127 wait_condition
= (fifo_idle
) ? &vmw_fifo_idle
:
131 * Block command submission while waiting for idle.
135 down_read(&fifo_state
->rwsem
);
136 signal_seq
= atomic_read(&dev_priv
->marker_seq
);
140 prepare_to_wait(&dev_priv
->fence_queue
, &__wait
,
142 TASK_INTERRUPTIBLE
: TASK_UNINTERRUPTIBLE
);
143 if (wait_condition(dev_priv
, seqno
))
145 if (time_after_eq(jiffies
, end_jiffies
)) {
146 DRM_ERROR("SVGA device lockup.\n");
151 else if ((++count
& 0x0F) == 0) {
153 * FIXME: Use schedule_hr_timeout here for
154 * newer kernels and lower CPU utilization.
157 __set_current_state(TASK_RUNNING
);
159 __set_current_state((interruptible
) ?
161 TASK_UNINTERRUPTIBLE
);
163 if (interruptible
&& signal_pending(current
)) {
168 finish_wait(&dev_priv
->fence_queue
, &__wait
);
169 if (ret
== 0 && fifo_idle
) {
170 __le32 __iomem
*fifo_mem
= dev_priv
->mmio_virt
;
171 iowrite32(signal_seq
, fifo_mem
+ SVGA_FIFO_FENCE
);
173 wake_up_all(&dev_priv
->fence_queue
);
175 up_read(&fifo_state
->rwsem
);
180 void vmw_seqno_waiter_add(struct vmw_private
*dev_priv
)
182 spin_lock(&dev_priv
->waiter_lock
);
183 if (dev_priv
->fence_queue_waiters
++ == 0) {
184 unsigned long irq_flags
;
186 spin_lock_irqsave(&dev_priv
->irq_lock
, irq_flags
);
187 outl(SVGA_IRQFLAG_ANY_FENCE
,
188 dev_priv
->io_start
+ VMWGFX_IRQSTATUS_PORT
);
189 dev_priv
->irq_mask
|= SVGA_IRQFLAG_ANY_FENCE
;
190 vmw_write(dev_priv
, SVGA_REG_IRQMASK
, dev_priv
->irq_mask
);
191 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irq_flags
);
193 spin_unlock(&dev_priv
->waiter_lock
);
196 void vmw_seqno_waiter_remove(struct vmw_private
*dev_priv
)
198 spin_lock(&dev_priv
->waiter_lock
);
199 if (--dev_priv
->fence_queue_waiters
== 0) {
200 unsigned long irq_flags
;
202 spin_lock_irqsave(&dev_priv
->irq_lock
, irq_flags
);
203 dev_priv
->irq_mask
&= ~SVGA_IRQFLAG_ANY_FENCE
;
204 vmw_write(dev_priv
, SVGA_REG_IRQMASK
, dev_priv
->irq_mask
);
205 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irq_flags
);
207 spin_unlock(&dev_priv
->waiter_lock
);
211 void vmw_goal_waiter_add(struct vmw_private
*dev_priv
)
213 spin_lock(&dev_priv
->waiter_lock
);
214 if (dev_priv
->goal_queue_waiters
++ == 0) {
215 unsigned long irq_flags
;
217 spin_lock_irqsave(&dev_priv
->irq_lock
, irq_flags
);
218 outl(SVGA_IRQFLAG_FENCE_GOAL
,
219 dev_priv
->io_start
+ VMWGFX_IRQSTATUS_PORT
);
220 dev_priv
->irq_mask
|= SVGA_IRQFLAG_FENCE_GOAL
;
221 vmw_write(dev_priv
, SVGA_REG_IRQMASK
, dev_priv
->irq_mask
);
222 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irq_flags
);
224 spin_unlock(&dev_priv
->waiter_lock
);
227 void vmw_goal_waiter_remove(struct vmw_private
*dev_priv
)
229 spin_lock(&dev_priv
->waiter_lock
);
230 if (--dev_priv
->goal_queue_waiters
== 0) {
231 unsigned long irq_flags
;
233 spin_lock_irqsave(&dev_priv
->irq_lock
, irq_flags
);
234 dev_priv
->irq_mask
&= ~SVGA_IRQFLAG_FENCE_GOAL
;
235 vmw_write(dev_priv
, SVGA_REG_IRQMASK
, dev_priv
->irq_mask
);
236 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irq_flags
);
238 spin_unlock(&dev_priv
->waiter_lock
);
241 int vmw_wait_seqno(struct vmw_private
*dev_priv
,
242 bool lazy
, uint32_t seqno
,
243 bool interruptible
, unsigned long timeout
)
246 struct vmw_fifo_state
*fifo
= &dev_priv
->fifo
;
248 if (likely(dev_priv
->last_read_seqno
- seqno
< VMW_FENCE_WRAP
))
251 if (likely(vmw_seqno_passed(dev_priv
, seqno
)))
254 vmw_fifo_ping_host(dev_priv
, SVGA_SYNC_GENERIC
);
256 if (!(fifo
->capabilities
& SVGA_FIFO_CAP_FENCE
))
257 return vmw_fallback_wait(dev_priv
, lazy
, true, seqno
,
258 interruptible
, timeout
);
260 if (!(dev_priv
->capabilities
& SVGA_CAP_IRQMASK
))
261 return vmw_fallback_wait(dev_priv
, lazy
, false, seqno
,
262 interruptible
, timeout
);
264 vmw_seqno_waiter_add(dev_priv
);
267 ret
= wait_event_interruptible_timeout
268 (dev_priv
->fence_queue
,
269 vmw_seqno_passed(dev_priv
, seqno
),
272 ret
= wait_event_timeout
273 (dev_priv
->fence_queue
,
274 vmw_seqno_passed(dev_priv
, seqno
),
277 vmw_seqno_waiter_remove(dev_priv
);
279 if (unlikely(ret
== 0))
281 else if (likely(ret
> 0))
287 void vmw_irq_preinstall(struct drm_device
*dev
)
289 struct vmw_private
*dev_priv
= vmw_priv(dev
);
292 if (!(dev_priv
->capabilities
& SVGA_CAP_IRQMASK
))
295 spin_lock_init(&dev_priv
->irq_lock
);
296 status
= inl(dev_priv
->io_start
+ VMWGFX_IRQSTATUS_PORT
);
297 outl(status
, dev_priv
->io_start
+ VMWGFX_IRQSTATUS_PORT
);
300 int vmw_irq_postinstall(struct drm_device
*dev
)
305 void vmw_irq_uninstall(struct drm_device
*dev
)
307 struct vmw_private
*dev_priv
= vmw_priv(dev
);
310 if (!(dev_priv
->capabilities
& SVGA_CAP_IRQMASK
))
313 vmw_write(dev_priv
, SVGA_REG_IRQMASK
, 0);
315 status
= inl(dev_priv
->io_start
+ VMWGFX_IRQSTATUS_PORT
);
316 outl(status
, dev_priv
->io_start
+ VMWGFX_IRQSTATUS_PORT
);