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Date: Thu, 12 Feb 2009 02:15:37 -0800 (PST)
From: David Miller <davem@...emloft.net>
To: airlied@...ux.ie
CC: benh@...nel.crashing.org, dri-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org
Subject: [PATCH 3/5]: drm: radeon: Fix ring_rptr accesses.
The memory behind ring_rptr can either be in ioremapped memory
or a vmalloc() normal kernel memory buffer.
However, the code unconditionally uses DRM_{READ,WRITE}32() (and thus
readl() and writel()) to access it.
Basically, if RADEON_IS_AGP then it's ioremap()'d memory else it's
vmalloc'd memory.
Adjust all of the ring_rptr access code as needed.
While we're here, kill the 'scratch' pointer in drm_radeon_private.
It's only used in the one place where it is initialized.
Signed-off-by: David S. Miller <davem@...emloft.net>
---
drivers/gpu/drm/radeon/radeon_cp.c | 70 +++++++++++++++++++++++++++------
drivers/gpu/drm/radeon/radeon_drv.h | 17 ++++----
drivers/gpu/drm/radeon/radeon_state.c | 6 +-
3 files changed, 70 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_cp.c b/drivers/gpu/drm/radeon/radeon_cp.c
index ae4ffa1..9053755 100644
--- a/drivers/gpu/drm/radeon/radeon_cp.c
+++ b/drivers/gpu/drm/radeon/radeon_cp.c
@@ -43,6 +43,52 @@
static int radeon_do_cleanup_cp(struct drm_device * dev);
static void radeon_do_cp_start(drm_radeon_private_t * dev_priv);
+static u32 radeon_read_ring_rptr(drm_radeon_private_t *dev_priv, u32 off)
+{
+ u32 val;
+
+ if (dev_priv->flags & RADEON_IS_AGP) {
+ val = DRM_READ32(dev_priv->ring_rptr, off);
+ } else {
+ val = *(((volatile u32 *)
+ dev_priv->ring_rptr->handle) +
+ (off / sizeof(u32)));
+ val = le32_to_cpu(val);
+ }
+ return val;
+}
+
+u32 radeon_get_ring_head(drm_radeon_private_t *dev_priv)
+{
+ if (dev_priv->writeback_works)
+ return radeon_read_ring_rptr(dev_priv, 0);
+ else
+ return RADEON_READ(RADEON_CP_RB_RPTR);
+}
+
+static void radeon_write_ring_rptr(drm_radeon_private_t *dev_priv, u32 off, u32 val)
+{
+ if (dev_priv->flags & RADEON_IS_AGP)
+ DRM_WRITE32(dev_priv->ring_rptr, off, val);
+ else
+ *(((volatile u32 *) dev_priv->ring_rptr->handle) +
+ (off / sizeof(u32))) = cpu_to_le32(val);
+}
+
+void radeon_set_ring_head(drm_radeon_private_t *dev_priv, u32 val)
+{
+ radeon_write_ring_rptr(dev_priv, 0, val);
+}
+
+u32 radeon_get_scratch(drm_radeon_private_t *dev_priv, int index)
+{
+ if (dev_priv->writeback_works)
+ return radeon_read_ring_rptr(dev_priv,
+ RADEON_SCRATCHOFF(index));
+ else
+ return RADEON_READ(RADEON_SCRATCH_REG0 + 4*index);
+}
+
static u32 R500_READ_MCIND(drm_radeon_private_t *dev_priv, int addr)
{
u32 ret;
@@ -647,10 +693,6 @@ static void radeon_cp_init_ring_buffer(struct drm_device * dev,
RADEON_WRITE(RADEON_SCRATCH_ADDR, RADEON_READ(RADEON_CP_RB_RPTR_ADDR)
+ RADEON_SCRATCH_REG_OFFSET);
- dev_priv->scratch = ((__volatile__ u32 *)
- dev_priv->ring_rptr->handle +
- (RADEON_SCRATCH_REG_OFFSET / sizeof(u32)));
-
RADEON_WRITE(RADEON_SCRATCH_UMSK, 0x7);
/* Turn on bus mastering */
@@ -668,13 +710,13 @@ static void radeon_cp_init_ring_buffer(struct drm_device * dev,
RADEON_WRITE(RADEON_BUS_CNTL, tmp);
} /* PCIE cards appears to not need this */
- dev_priv->scratch[0] = 0;
+ radeon_write_ring_rptr(dev_priv, RADEON_SCRATCHOFF(0), 0);
RADEON_WRITE(RADEON_LAST_FRAME_REG, 0);
- dev_priv->scratch[1] = 0;
+ radeon_write_ring_rptr(dev_priv, RADEON_SCRATCHOFF(1), 0);
RADEON_WRITE(RADEON_LAST_DISPATCH_REG, 0);
- dev_priv->scratch[2] = 0;
+ radeon_write_ring_rptr(dev_priv, RADEON_SCRATCHOFF(2), 0);
RADEON_WRITE(RADEON_LAST_CLEAR_REG, 0);
radeon_do_wait_for_idle(dev_priv);
@@ -698,12 +740,15 @@ static void radeon_test_writeback(drm_radeon_private_t * dev_priv)
/* Writeback doesn't seem to work everywhere, test it here and possibly
* enable it if it appears to work
*/
- DRM_WRITE32(dev_priv->ring_rptr, RADEON_SCRATCHOFF(1), 0);
+ radeon_write_ring_rptr(dev_priv, RADEON_SCRATCHOFF(1), 0);
+
RADEON_WRITE(RADEON_SCRATCH_REG1, 0xdeadbeef);
for (tmp = 0; tmp < dev_priv->usec_timeout; tmp++) {
- if (DRM_READ32(dev_priv->ring_rptr, RADEON_SCRATCHOFF(1)) ==
- 0xdeadbeef)
+ u32 val;
+
+ val = radeon_read_ring_rptr(dev_priv, RADEON_SCRATCHOFF(1));
+ if (val == 0xdeadbeef)
break;
DRM_UDELAY(1);
}
@@ -1540,7 +1585,7 @@ struct drm_buf *radeon_freelist_get(struct drm_device * dev)
start = dev_priv->last_buf;
for (t = 0; t < dev_priv->usec_timeout; t++) {
- u32 done_age = GET_SCRATCH(1);
+ u32 done_age = GET_SCRATCH(dev_priv, 1);
DRM_DEBUG("done_age = %d\n", done_age);
for (i = start; i < dma->buf_count; i++) {
buf = dma->buflist[i];
@@ -1574,8 +1619,9 @@ struct drm_buf *radeon_freelist_get(struct drm_device * dev)
struct drm_buf *buf;
int i, t;
int start;
- u32 done_age = DRM_READ32(dev_priv->ring_rptr, RADEON_SCRATCHOFF(1));
+ u32 done_age;
+ done_age = radeon_read_ring_rptr(dev_priv, RADEON_SCRATCHOFF(1));
if (++dev_priv->last_buf >= dma->buf_count)
dev_priv->last_buf = 0;
diff --git a/drivers/gpu/drm/radeon/radeon_drv.h b/drivers/gpu/drm/radeon/radeon_drv.h
index c608e22..a253cf0 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.h
+++ b/drivers/gpu/drm/radeon/radeon_drv.h
@@ -160,10 +160,6 @@ enum radeon_chip_flags {
RADEON_IS_IGPGART = 0x01000000UL,
};
-#define GET_RING_HEAD(dev_priv) (dev_priv->writeback_works ? \
- DRM_READ32( (dev_priv)->ring_rptr, 0 ) : RADEON_READ(RADEON_CP_RB_RPTR))
-#define SET_RING_HEAD(dev_priv,val) DRM_WRITE32( (dev_priv)->ring_rptr, 0, (val) )
-
typedef struct drm_radeon_freelist {
unsigned int age;
struct drm_buf *buf;
@@ -248,7 +244,6 @@ typedef struct drm_radeon_private {
drm_radeon_freelist_t *head;
drm_radeon_freelist_t *tail;
int last_buf;
- volatile u32 *scratch;
int writeback_works;
int usec_timeout;
@@ -338,6 +333,12 @@ extern int radeon_no_wb;
extern struct drm_ioctl_desc radeon_ioctls[];
extern int radeon_max_ioctl;
+extern u32 radeon_get_ring_head(drm_radeon_private_t *dev_priv);
+extern void radeon_set_ring_head(drm_radeon_private_t *dev_priv, u32 val);
+
+#define GET_RING_HEAD(dev_priv) radeon_get_ring_head(dev_priv)
+#define SET_RING_HEAD(dev_priv, val) radeon_set_ring_head(dev_priv, val)
+
/* Check whether the given hardware address is inside the framebuffer or the
* GART area.
*/
@@ -639,9 +640,9 @@ extern int r300_do_cp_cmdbuf(struct drm_device *dev,
#define RADEON_SCRATCHOFF( x ) (RADEON_SCRATCH_REG_OFFSET + 4*(x))
-#define GET_SCRATCH( x ) (dev_priv->writeback_works \
- ? DRM_READ32( dev_priv->ring_rptr, RADEON_SCRATCHOFF(x) ) \
- : RADEON_READ( RADEON_SCRATCH_REG0 + 4*(x) ) )
+extern u32 radeon_get_scratch(drm_radeon_private_t *dev_priv, int index);
+
+#define GET_SCRATCH(dev_priv, x) radeon_get_scratch(dev_priv, x)
#define RADEON_GEN_INT_CNTL 0x0040
# define RADEON_CRTC_VBLANK_MASK (1 << 0)
diff --git a/drivers/gpu/drm/radeon/radeon_state.c b/drivers/gpu/drm/radeon/radeon_state.c
index ef940a0..03fea43 100644
--- a/drivers/gpu/drm/radeon/radeon_state.c
+++ b/drivers/gpu/drm/radeon/radeon_state.c
@@ -3010,14 +3010,14 @@ static int radeon_cp_getparam(struct drm_device *dev, void *data, struct drm_fil
break;
case RADEON_PARAM_LAST_FRAME:
dev_priv->stats.last_frame_reads++;
- value = GET_SCRATCH(0);
+ value = GET_SCRATCH(dev_priv, 0);
break;
case RADEON_PARAM_LAST_DISPATCH:
- value = GET_SCRATCH(1);
+ value = GET_SCRATCH(dev_priv, 1);
break;
case RADEON_PARAM_LAST_CLEAR:
dev_priv->stats.last_clear_reads++;
- value = GET_SCRATCH(2);
+ value = GET_SCRATCH(dev_priv, 2);
break;
case RADEON_PARAM_IRQ_NR:
value = drm_dev_to_irq(dev);
--
1.6.1.2.350.g88cc
--
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