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Diffstat (limited to 'linux/gamma_dma.c')
-rw-r--r--linux/gamma_dma.c81
1 files changed, 42 insertions, 39 deletions
diff --git a/linux/gamma_dma.c b/linux/gamma_dma.c
index 4a2acfb3..ad981bdd 100644
--- a/linux/gamma_dma.c
+++ b/linux/gamma_dma.c
@@ -11,11 +11,11 @@
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
- *
+ *
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
- *
+ *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
@@ -23,7 +23,7 @@
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
- *
+ *
* Authors:
* Rickard E. (Rik) Faith <faith@valinux.com>
*
@@ -97,7 +97,7 @@ static inline void gamma_dma_quiescent_single(drm_device_t *dev)
GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
GAMMA_WRITE(GAMMA_SYNC, 0);
-
+
do {
while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
;
@@ -115,13 +115,13 @@ static inline void gamma_dma_quiescent_dual(drm_device_t *dev)
GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
GAMMA_WRITE(GAMMA_SYNC, 0);
-
+
/* Read from first MX */
do {
while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
;
} while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG);
-
+
/* Read from second MX */
do {
while (!GAMMA_READ(GAMMA_OUTFIFOWORDS + 0x10000))
@@ -144,7 +144,7 @@ static void gamma_dma_service(int irq, void *device, struct pt_regs *regs)
{
drm_device_t *dev = (drm_device_t *)device;
drm_device_dma_t *dma = dev->dma;
-
+
atomic_inc(&dev->total_irq);
GAMMA_WRITE(GAMMA_GDELAYTIMER, 0xc350/2); /* 0x05S */
GAMMA_WRITE(GAMMA_GCOMMANDINTFLAGS, 8);
@@ -183,7 +183,7 @@ static int gamma_do_dma(drm_device_t *dev, int locked)
atomic_inc(&dma->total_missed_dma);
return -EBUSY;
}
-
+
#if DRM_DMA_HISTOGRAM
dma_start = get_cycles();
#endif
@@ -215,7 +215,7 @@ static int gamma_do_dma(drm_device_t *dev, int locked)
clear_bit(0, &dev->dma_flag);
return 0;
}
-
+
if (!gamma_dma_is_ready(dev)) {
clear_bit(0, &dev->dma_flag);
return -EBUSY;
@@ -246,7 +246,7 @@ static int gamma_do_dma(drm_device_t *dev, int locked)
}
retcode = -EBUSY;
goto cleanup;
-
+
/* POST: we will wait for the context
switch and will dispatch on a later call
when dev->last_context == buf->context.
@@ -371,9 +371,9 @@ again:
goto again;
}
}
-
+
clear_bit(0, &dev->interrupt_flag);
-
+
#if DRM_DMA_HISTOGRAM
atomic_inc(&dev->histo.schedule[drm_histogram_slot(get_cycles()
- schedule_start)]);
@@ -461,7 +461,7 @@ static int gamma_dma_priority(drm_device_t *dev, drm_dma_t *d)
goto cleanup;
}
buf->pending = 1;
-
+
if (dev->last_context != buf->context
&& !(dev->queuelist[buf->context]->flags
& _DRM_CONTEXT_PRESERVED)) {
@@ -496,7 +496,7 @@ static int gamma_dma_priority(drm_device_t *dev, drm_dma_t *d)
gamma_dma_dispatch(dev, address, length);
atomic_add(length, &dma->total_bytes);
atomic_inc(&dma->total_dmas);
-
+
if (last_buf) {
drm_free_buffer(dev, last_buf);
}
@@ -509,7 +509,7 @@ cleanup:
gamma_dma_ready(dev);
drm_free_buffer(dev, last_buf);
}
-
+
if (must_free && !dev->context_flag) {
if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT)) {
@@ -531,15 +531,15 @@ static int gamma_dma_send_buffers(drm_device_t *dev, drm_dma_t *d)
last_buf = dma->buflist[d->send_indices[d->send_count-1]];
add_wait_queue(&last_buf->dma_wait, &entry);
}
-
+
if ((retcode = drm_dma_enqueue(dev, d))) {
if (d->flags & _DRM_DMA_BLOCK)
remove_wait_queue(&last_buf->dma_wait, &entry);
return retcode;
}
-
+
gamma_dma_schedule(dev, 0);
-
+
if (d->flags & _DRM_DMA_BLOCK) {
DRM_DEBUG("%d waiting\n", current->pid);
current->state = TASK_INTERRUPTIBLE;
@@ -586,7 +586,8 @@ int gamma_dma(struct inode *inode, struct file *filp, unsigned int cmd,
int retcode = 0;
drm_dma_t d;
- copy_from_user_ret(&d, (drm_dma_t *)arg, sizeof(d), -EFAULT);
+ if (copy_from_user(&d, (drm_dma_t *)arg, sizeof(d)))
+ return -EFAULT;
DRM_DEBUG("%d %d: %d send, %d req\n",
current->pid, d.context, d.send_count, d.request_count);
@@ -609,7 +610,7 @@ int gamma_dma(struct inode *inode, struct file *filp, unsigned int cmd,
if (d.send_count) {
if (d.flags & _DRM_DMA_PRIORITY)
retcode = gamma_dma_priority(dev, &d);
- else
+ else
retcode = gamma_dma_send_buffers(dev, &d);
}
@@ -621,7 +622,8 @@ int gamma_dma(struct inode *inode, struct file *filp, unsigned int cmd,
DRM_DEBUG("%d returning, granted = %d\n",
current->pid, d.granted_count);
- copy_to_user_ret((drm_dma_t *)arg, &d, sizeof(d), -EFAULT);
+ if (copy_to_user((drm_dma_t *)arg, &d, sizeof(d)))
+ return -EFAULT;
return retcode;
}
@@ -631,7 +633,7 @@ int gamma_irq_install(drm_device_t *dev, int irq)
int retcode;
if (!irq) return -EINVAL;
-
+
down(&dev->struct_sem);
if (dev->irq) {
up(&dev->struct_sem);
@@ -639,13 +641,13 @@ int gamma_irq_install(drm_device_t *dev, int irq)
}
dev->irq = irq;
up(&dev->struct_sem);
-
+
DRM_DEBUG("%d\n", irq);
dev->context_flag = 0;
dev->interrupt_flag = 0;
dev->dma_flag = 0;
-
+
dev->dma->next_buffer = NULL;
dev->dma->next_queue = NULL;
dev->dma->this_buffer = NULL;
@@ -659,7 +661,7 @@ int gamma_irq_install(drm_device_t *dev, int irq)
/* Before installing handler */
GAMMA_WRITE(GAMMA_GCOMMANDMODE, 0);
GAMMA_WRITE(GAMMA_GDMACONTROL, 0);
-
+
/* Install handler */
if ((retcode = request_irq(dev->irq,
gamma_dma_service,
@@ -676,7 +678,7 @@ int gamma_irq_install(drm_device_t *dev, int irq)
GAMMA_WRITE(GAMMA_GINTENABLE, 0x2001);
GAMMA_WRITE(GAMMA_COMMANDINTENABLE, 0x0008);
GAMMA_WRITE(GAMMA_GDELAYTIMER, 0x39090);
-
+
return 0;
}
@@ -688,11 +690,11 @@ int gamma_irq_uninstall(drm_device_t *dev)
irq = dev->irq;
dev->irq = 0;
up(&dev->struct_sem);
-
+
if (!irq) return -EINVAL;
-
+
DRM_DEBUG("%d\n", irq);
-
+
GAMMA_WRITE(GAMMA_GDELAYTIMER, 0);
GAMMA_WRITE(GAMMA_COMMANDINTENABLE, 0);
GAMMA_WRITE(GAMMA_GINTENABLE, 0);
@@ -709,9 +711,10 @@ int gamma_control(struct inode *inode, struct file *filp, unsigned int cmd,
drm_device_t *dev = priv->dev;
drm_control_t ctl;
int retcode;
-
- copy_from_user_ret(&ctl, (drm_control_t *)arg, sizeof(ctl), -EFAULT);
-
+
+ if (copy_from_user(&ctl, (drm_control_t *)arg, sizeof(ctl)))
+ return -EFAULT;
+
switch (ctl.func) {
case DRM_INST_HANDLER:
if ((retcode = gamma_irq_install(dev, ctl.irq)))
@@ -742,7 +745,8 @@ int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
dev->lck_start = start = get_cycles();
#endif
- copy_from_user_ret(&lock, (drm_lock_t *)arg, sizeof(lock), -EFAULT);
+ if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
+ return -EFAULT;
if (lock.context == DRM_KERNEL_CONTEXT) {
DRM_ERROR("Process %d using kernel context %d\n",
@@ -757,7 +761,7 @@ int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
if (lock.context < 0 || lock.context >= dev->queue_count)
return -EINVAL;
q = dev->queuelist[lock.context];
-
+
ret = drm_flush_block_and_flush(dev, lock.context, lock.flags);
if (!ret) {
@@ -787,7 +791,7 @@ int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
atomic_inc(&q->total_locks);
break; /* Got lock */
}
-
+
/* Contention */
atomic_inc(&dev->total_sleeps);
current->state = TASK_INTERRUPTIBLE;
@@ -802,9 +806,8 @@ int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
}
drm_flush_unblock(dev, lock.context, lock.flags); /* cleanup phase */
-
+
if (!ret) {
-#if LINUX_VERSION_CODE >= 0x020400 /* KERNEL_VERSION(2,4,0) */
sigemptyset(&dev->sigmask);
sigaddset(&dev->sigmask, SIGSTOP);
sigaddset(&dev->sigmask, SIGTSTP);
@@ -813,7 +816,7 @@ int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
dev->sigdata.context = lock.context;
dev->sigdata.lock = dev->lock.hw_lock;
block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);
-#endif
+
if (lock.flags & _DRM_LOCK_READY)
gamma_dma_ready(dev);
if (lock.flags & _DRM_LOCK_QUIESCENT) {
@@ -829,6 +832,6 @@ int gamma_lock(struct inode *inode, struct file *filp, unsigned int cmd,
#if DRM_DMA_HISTOGRAM
atomic_inc(&dev->histo.lacq[drm_histogram_slot(get_cycles() - start)]);
#endif
-
+
return ret;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 09:00:25 +0000