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-rw-r--r--linux/gamma_dma.c316
1 files changed, 282 insertions, 34 deletions
diff --git a/linux/gamma_dma.c b/linux/gamma_dma.c
index 7510e2b5..094f51d6 100644
--- a/linux/gamma_dma.c
+++ b/linux/gamma_dma.c
@@ -37,28 +37,25 @@
#include <linux/interrupt.h> /* For task queue support */
#include <linux/delay.h>
-
static inline void gamma_dma_dispatch(drm_device_t *dev, unsigned long address,
unsigned long length)
{
drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
-
- GAMMA_WRITE(GAMMA_DMAADDRESS, virt_to_phys((void *)address));
- while (GAMMA_READ(GAMMA_GCOMMANDSTATUS) != 4)
- ;
+ (drm_gamma_private_t *)dev->dev_private;
+ mb();
+ while ( GAMMA_READ(GAMMA_INFIFOSPACE) < 2);
+ GAMMA_WRITE(GAMMA_DMAADDRESS, address);
+ while (GAMMA_READ(GAMMA_GCOMMANDSTATUS) != 4);
GAMMA_WRITE(GAMMA_DMACOUNT, length / 4);
}
void gamma_dma_quiescent_single(drm_device_t *dev)
{
drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
+ (drm_gamma_private_t *)dev->dev_private;
+ while (GAMMA_READ(GAMMA_DMACOUNT));
- while (GAMMA_READ(GAMMA_DMACOUNT))
- ;
- while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
- ;
+ while (GAMMA_READ(GAMMA_INFIFOSPACE) < 2);
GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
GAMMA_WRITE(GAMMA_SYNC, 0);
@@ -72,56 +69,50 @@ void gamma_dma_quiescent_single(drm_device_t *dev)
void gamma_dma_quiescent_dual(drm_device_t *dev)
{
drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
+ (drm_gamma_private_t *)dev->dev_private;
+ while (GAMMA_READ(GAMMA_DMACOUNT));
- while (GAMMA_READ(GAMMA_DMACOUNT))
- ;
- while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
- ;
+ while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3);
GAMMA_WRITE(GAMMA_BROADCASTMASK, 3);
-
GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
GAMMA_WRITE(GAMMA_SYNC, 0);
- /* Read from first MX */
+ /* Read from first MX */
do {
- while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
- ;
+ while (!GAMMA_READ(GAMMA_OUTFIFOWORDS));
} while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG);
- /* Read from second MX */
+ /* Read from second MX */
do {
- while (!GAMMA_READ(GAMMA_OUTFIFOWORDS + 0x10000))
- ;
+ while (!GAMMA_READ(GAMMA_OUTFIFOWORDS + 0x10000));
} while (GAMMA_READ(GAMMA_OUTPUTFIFO + 0x10000) != GAMMA_SYNC_TAG);
}
void gamma_dma_ready(drm_device_t *dev)
{
drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
-
- while (GAMMA_READ(GAMMA_DMACOUNT))
- ;
+ (drm_gamma_private_t *)dev->dev_private;
+ while (GAMMA_READ(GAMMA_DMACOUNT));
}
static inline int gamma_dma_is_ready(drm_device_t *dev)
{
drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
-
- return !GAMMA_READ(GAMMA_DMACOUNT);
+ (drm_gamma_private_t *)dev->dev_private;
+ return(!GAMMA_READ(GAMMA_DMACOUNT));
}
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;
+ drm_device_t *dev = (drm_device_t *)device;
+ drm_device_dma_t *dma = dev->dma;
drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
+ (drm_gamma_private_t *)dev->dev_private;
atomic_inc(&dev->counts[6]); /* _DRM_STAT_IRQ */
+
+ while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3);
GAMMA_WRITE(GAMMA_GDELAYTIMER, 0xc350/2); /* 0x05S */
GAMMA_WRITE(GAMMA_GCOMMANDINTFLAGS, 8);
GAMMA_WRITE(GAMMA_GINTFLAGS, 0x2001);
@@ -165,7 +156,9 @@ static int gamma_do_dma(drm_device_t *dev, int locked)
}
buf = dma->next_buffer;
- address = (unsigned long)buf->address;
+ /* WE NOW ARE ON LOGICAL PAGES!! - using page table setup in dma_init */
+ /* So we pass the buffer index value into the physical page offset */
+ address = buf->idx << 12;
length = buf->used;
DRM_DEBUG("context %d, buffer %d (%ld bytes)\n",
@@ -232,6 +225,9 @@ static int gamma_do_dma(drm_device_t *dev, int locked)
buf->time_dispatched = get_cycles();
#endif
+ /* WE NOW ARE ON LOGICAL PAGES!!! - overriding address */
+ address = buf->idx << 12;
+
gamma_dma_dispatch(dev, address, length);
gamma_free_buffer(dev, dma->this_buffer);
dma->this_buffer = buf;
@@ -582,3 +578,255 @@ int gamma_dma(struct inode *inode, struct file *filp, unsigned int cmd,
return retcode;
}
+
+/* =============================================================
+ * DMA initialization, cleanup
+ */
+
+static int gamma_do_init_dma( drm_device_t *dev, drm_gamma_init_t *init )
+{
+ drm_gamma_private_t *dev_priv;
+ drm_device_dma_t *dma = dev->dma;
+ drm_buf_t *buf;
+ int i;
+ struct list_head *list;
+ unsigned int *pgt;
+
+ DRM_DEBUG( "%s\n", __FUNCTION__ );
+
+ dev_priv = DRM(alloc)( sizeof(drm_gamma_private_t),
+ DRM_MEM_DRIVER );
+ if ( !dev_priv )
+ return -ENOMEM;
+
+ dev->dev_private = (void *)dev_priv;
+
+ memset( dev_priv, 0, sizeof(drm_gamma_private_t) );
+
+ list_for_each(list, &dev->maplist->head) {
+ drm_map_list_t *r_list = (drm_map_list_t *)list;
+ if( r_list->map &&
+ r_list->map->type == _DRM_SHM &&
+ r_list->map->flags & _DRM_CONTAINS_LOCK ) {
+ dev_priv->sarea = r_list->map;
+ break;
+ }
+ }
+
+ DRM_FIND_MAP( dev_priv->mmio0, init->mmio0 );
+ DRM_FIND_MAP( dev_priv->mmio1, init->mmio1 );
+ DRM_FIND_MAP( dev_priv->mmio2, init->mmio2 );
+ DRM_FIND_MAP( dev_priv->mmio3, init->mmio3 );
+
+ dev_priv->sarea_priv = (drm_gamma_sarea_t *)
+ ((u8 *)dev_priv->sarea->handle +
+ init->sarea_priv_offset);
+
+ if (init->pcimode) {
+ buf = dma->buflist[GLINT_DRI_BUF_COUNT];
+ pgt = buf->address;
+
+ for (i = 0; i < GLINT_DRI_BUF_COUNT; i++) {
+ buf = dma->buflist[i];
+ *pgt = virt_to_phys((void*)buf->address) | 0x07;
+ pgt++;
+ }
+
+ buf = dma->buflist[GLINT_DRI_BUF_COUNT];
+ } else {
+ DRM_FIND_MAP( dev_priv->buffers, init->buffers_offset );
+
+ DRM_IOREMAP( dev_priv->buffers );
+
+ buf = dma->buflist[GLINT_DRI_BUF_COUNT];
+ pgt = buf->address;
+
+ for (i = 0; i < GLINT_DRI_BUF_COUNT; i++) {
+ buf = dma->buflist[i];
+ *pgt = (unsigned int)buf->address + 0x07;
+ pgt++;
+ }
+
+ buf = dma->buflist[GLINT_DRI_BUF_COUNT];
+
+ while (GAMMA_READ(GAMMA_INFIFOSPACE) < 1);
+ GAMMA_WRITE( GAMMA_GDMACONTROL, 0xe);
+ }
+ while (GAMMA_READ(GAMMA_INFIFOSPACE) < 2);
+ GAMMA_WRITE( GAMMA_PAGETABLEADDR, virt_to_phys((void*)buf->address) );
+ GAMMA_WRITE( GAMMA_PAGETABLELENGTH, 2 );
+
+ return 0;
+}
+
+int gamma_do_cleanup_dma( drm_device_t *dev )
+{
+ DRM_DEBUG( "%s\n", __FUNCTION__ );
+
+ if ( dev->dev_private ) {
+ drm_gamma_private_t *dev_priv = dev->dev_private;
+
+ DRM_IOREMAPFREE( dev_priv->buffers );
+
+ DRM(free)( dev->dev_private, sizeof(drm_gamma_private_t),
+ DRM_MEM_DRIVER );
+ dev->dev_private = NULL;
+ }
+
+ return 0;
+}
+
+int gamma_dma_init( struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg )
+{
+ drm_file_t *priv = filp->private_data;
+ drm_device_t *dev = priv->dev;
+ drm_gamma_init_t init;
+
+ if ( copy_from_user( &init, (drm_gamma_init_t *)arg, sizeof(init) ) )
+ return -EFAULT;
+
+ switch ( init.func ) {
+ case GAMMA_INIT_DMA:
+ return gamma_do_init_dma( dev, &init );
+ case GAMMA_CLEANUP_DMA:
+ return gamma_do_cleanup_dma( dev );
+ }
+
+ return -EINVAL;
+}
+
+static int gamma_do_copy_dma( drm_device_t *dev, drm_gamma_copy_t *copy )
+{
+ drm_device_dma_t *dma = dev->dma;
+ unsigned int *screenbuf;
+
+ DRM_DEBUG( "%s\n", __FUNCTION__ );
+
+ /* We've DRM_RESTRICTED this DMA buffer */
+
+ screenbuf = dma->buflist[ GLINT_DRI_BUF_COUNT + 1 ]->address;
+
+#if 0
+ *buffer++ = 0x180; /* Tag (FilterMode) */
+ *buffer++ = 0x200; /* Allow FBColor through */
+ *buffer++ = 0x53B; /* Tag */
+ *buffer++ = copy->Pitch;
+ *buffer++ = 0x53A; /* Tag */
+ *buffer++ = copy->SrcAddress;
+ *buffer++ = 0x539; /* Tag */
+ *buffer++ = copy->WidthHeight; /* Initiates transfer */
+ *buffer++ = 0x53C; /* Tag - DMAOutputAddress */
+ *buffer++ = virt_to_phys((void*)screenbuf);
+ *buffer++ = 0x53D; /* Tag - DMAOutputCount */
+ *buffer++ = copy->Count; /* Reads HostOutFifo BLOCKS until ..*/
+
+ /* Data now sitting in dma->buflist[ GLINT_DRI_BUF_COUNT + 1 ] */
+ /* Now put it back to the screen */
+
+ *buffer++ = 0x180; /* Tag (FilterMode) */
+ *buffer++ = 0x400; /* Allow Sync through */
+ *buffer++ = 0x538; /* Tag - DMARectangleReadTarget */
+ *buffer++ = 0x155; /* FBSourceData | count */
+ *buffer++ = 0x537; /* Tag */
+ *buffer++ = copy->Pitch;
+ *buffer++ = 0x536; /* Tag */
+ *buffer++ = copy->DstAddress;
+ *buffer++ = 0x535; /* Tag */
+ *buffer++ = copy->WidthHeight; /* Initiates transfer */
+ *buffer++ = 0x530; /* Tag - DMAAddr */
+ *buffer++ = virt_to_phys((void*)screenbuf);
+ *buffer++ = 0x531;
+ *buffer++ = copy->Count; /* initiates DMA transfer of color data */
+#endif
+
+ /* need to dispatch it now */
+
+ return 0;
+}
+
+int gamma_dma_copy( struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg )
+{
+ drm_file_t *priv = filp->private_data;
+ drm_device_t *dev = priv->dev;
+ drm_gamma_copy_t copy;
+
+ if ( copy_from_user( &copy, (drm_gamma_copy_t *)arg, sizeof(copy) ) )
+ return -EFAULT;
+
+ return gamma_do_copy_dma( dev, &copy );
+}
+
+/* =============================================================
+ * Per Context SAREA Support
+ */
+
+int gamma_getsareactx(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ drm_file_t *priv = filp->private_data;
+ drm_device_t *dev = priv->dev;
+ drm_ctx_priv_map_t request;
+ drm_map_t *map;
+
+ if (copy_from_user(&request,
+ (drm_ctx_priv_map_t *)arg,
+ sizeof(request)))
+ return -EFAULT;
+
+ down(&dev->struct_sem);
+ if ((int)request.ctx_id >= dev->max_context) {
+ up(&dev->struct_sem);
+ return -EINVAL;
+ }
+
+ map = dev->context_sareas[request.ctx_id];
+ up(&dev->struct_sem);
+
+ request.handle = map->handle;
+ if (copy_to_user((drm_ctx_priv_map_t *)arg, &request, sizeof(request)))
+ return -EFAULT;
+ return 0;
+}
+
+int gamma_setsareactx(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ drm_file_t *priv = filp->private_data;
+ drm_device_t *dev = priv->dev;
+ drm_ctx_priv_map_t request;
+ drm_map_t *map = NULL;
+ drm_map_list_t *r_list;
+ struct list_head *list;
+
+ if (copy_from_user(&request,
+ (drm_ctx_priv_map_t *)arg,
+ sizeof(request)))
+ return -EFAULT;
+
+ down(&dev->struct_sem);
+ r_list = NULL;
+ list_for_each(list, &dev->maplist->head) {
+ r_list = (drm_map_list_t *)list;
+ if(r_list->map &&
+ r_list->map->handle == request.handle) break;
+ }
+ if (list == &(dev->maplist->head)) {
+ up(&dev->struct_sem);
+ return -EINVAL;
+ }
+ map = r_list->map;
+ up(&dev->struct_sem);
+
+ if (!map) return -EINVAL;
+
+ down(&dev->struct_sem);
+ if ((int)request.ctx_id >= dev->max_context) {
+ up(&dev->struct_sem);
+ return -EINVAL;
+ }
+ dev->context_sareas[request.ctx_id] = map;
+ up(&dev->struct_sem);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 09:20:32 +0000