drm: rework radeon memory map (radeon 1.23)
This code reworks the radeon memory map so it works better
for newer r300 chips and for a lot of older PCI chips.
It really requires a new X driver in order to take advantage of this code.
From: Ben Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/r300_cmdbuf.c b/drivers/char/drm/r300_cmdbuf.c
index 9fbadb9..20b6cb3 100644
--- a/drivers/char/drm/r300_cmdbuf.c
+++ b/drivers/char/drm/r300_cmdbuf.c
@@ -242,8 +242,10 @@
return 0;
}
- /* we expect offsets passed to the framebuffer to be either within video memory or
- within AGP space */
+/*
+ * we expect offsets passed to the framebuffer to be either within video
+ * memory or within AGP space
+ */
static __inline__ int r300_check_offset(drm_radeon_private_t *dev_priv,
u32 offset)
{
@@ -251,11 +253,11 @@
but this value is not being kept.
This code is correct for now (does the same thing as the
code that sets MC_FB_LOCATION) in radeon_cp.c */
- if ((offset >= dev_priv->fb_location) &&
- (offset < dev_priv->gart_vm_start))
+ if (offset >= dev_priv->fb_location &&
+ offset < (dev_priv->fb_location + dev_priv->fb_size))
return 0;
- if ((offset >= dev_priv->gart_vm_start) &&
- (offset < dev_priv->gart_vm_start + dev_priv->gart_size))
+ if (offset >= dev_priv->gart_vm_start &&
+ offset < (dev_priv->gart_vm_start + dev_priv->gart_size))
return 0;
return 1;
}
@@ -490,6 +492,7 @@
return 0;
}
+
static __inline__ int r300_emit_bitblt_multi(drm_radeon_private_t *dev_priv,
drm_radeon_kcmd_buffer_t *cmdbuf)
{
diff --git a/drivers/char/drm/radeon_cp.c b/drivers/char/drm/radeon_cp.c
index 9bb8ae0..cc4942a 100644
--- a/drivers/char/drm/radeon_cp.c
+++ b/drivers/char/drm/radeon_cp.c
@@ -1118,14 +1118,20 @@
{
u32 ring_start, cur_read_ptr;
u32 tmp;
-
- /* Initialize the memory controller */
- RADEON_WRITE(RADEON_MC_FB_LOCATION,
- ((dev_priv->gart_vm_start - 1) & 0xffff0000)
- | (dev_priv->fb_location >> 16));
+
+ /* Initialize the memory controller. With new memory map, the fb location
+ * is not changed, it should have been properly initialized already. Part
+ * of the problem is that the code below is bogus, assuming the GART is
+ * always appended to the fb which is not necessarily the case
+ */
+ if (!dev_priv->new_memmap)
+ RADEON_WRITE(RADEON_MC_FB_LOCATION,
+ ((dev_priv->gart_vm_start - 1) & 0xffff0000)
+ | (dev_priv->fb_location >> 16));
#if __OS_HAS_AGP
if (dev_priv->flags & CHIP_IS_AGP) {
+ RADEON_WRITE(RADEON_AGP_BASE, (unsigned int)dev->agp->base);
RADEON_WRITE(RADEON_MC_AGP_LOCATION,
(((dev_priv->gart_vm_start - 1 +
dev_priv->gart_size) & 0xffff0000) |
@@ -1153,8 +1159,6 @@
#if __OS_HAS_AGP
if (dev_priv->flags & CHIP_IS_AGP) {
- /* set RADEON_AGP_BASE here instead of relying on X from user space */
- RADEON_WRITE(RADEON_AGP_BASE, (unsigned int)dev->agp->base);
RADEON_WRITE(RADEON_CP_RB_RPTR_ADDR,
dev_priv->ring_rptr->offset
- dev->agp->base + dev_priv->gart_vm_start);
@@ -1174,6 +1178,17 @@
entry->handle + tmp_ofs);
}
+ /* Set ring buffer size */
+#ifdef __BIG_ENDIAN
+ RADEON_WRITE(RADEON_CP_RB_CNTL,
+ dev_priv->ring.size_l2qw | RADEON_BUF_SWAP_32BIT);
+#else
+ RADEON_WRITE(RADEON_CP_RB_CNTL, dev_priv->ring.size_l2qw);
+#endif
+
+ /* Start with assuming that writeback doesn't work */
+ dev_priv->writeback_works = 0;
+
/* Initialize the scratch register pointer. This will cause
* the scratch register values to be written out to memory
* whenever they are updated.
@@ -1190,7 +1205,38 @@
RADEON_WRITE(RADEON_SCRATCH_UMSK, 0x7);
- /* Writeback doesn't seem to work everywhere, test it first */
+ /* Turn on bus mastering */
+ tmp = RADEON_READ(RADEON_BUS_CNTL) & ~RADEON_BUS_MASTER_DIS;
+ RADEON_WRITE(RADEON_BUS_CNTL, tmp);
+
+ dev_priv->sarea_priv->last_frame = dev_priv->scratch[0] = 0;
+ RADEON_WRITE(RADEON_LAST_FRAME_REG, dev_priv->sarea_priv->last_frame);
+
+ dev_priv->sarea_priv->last_dispatch = dev_priv->scratch[1] = 0;
+ RADEON_WRITE(RADEON_LAST_DISPATCH_REG,
+ dev_priv->sarea_priv->last_dispatch);
+
+ dev_priv->sarea_priv->last_clear = dev_priv->scratch[2] = 0;
+ RADEON_WRITE(RADEON_LAST_CLEAR_REG, dev_priv->sarea_priv->last_clear);
+
+ radeon_do_wait_for_idle(dev_priv);
+
+ /* Sync everything up */
+ RADEON_WRITE(RADEON_ISYNC_CNTL,
+ (RADEON_ISYNC_ANY2D_IDLE3D |
+ RADEON_ISYNC_ANY3D_IDLE2D |
+ RADEON_ISYNC_WAIT_IDLEGUI |
+ RADEON_ISYNC_CPSCRATCH_IDLEGUI));
+
+}
+
+static void radeon_test_writeback(drm_radeon_private_t * dev_priv)
+{
+ u32 tmp;
+
+ /* 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(RADEON_SCRATCH_REG1, 0xdeadbeef);
@@ -1203,46 +1249,15 @@
if (tmp < dev_priv->usec_timeout) {
dev_priv->writeback_works = 1;
- DRM_DEBUG("writeback test succeeded, tmp=%d\n", tmp);
+ DRM_INFO("writeback test succeeded in %d usecs\n", tmp);
} else {
dev_priv->writeback_works = 0;
- DRM_DEBUG("writeback test failed\n");
+ DRM_INFO("writeback test failed\n");
}
if (radeon_no_wb == 1) {
dev_priv->writeback_works = 0;
- DRM_DEBUG("writeback forced off\n");
+ DRM_INFO("writeback forced off\n");
}
-
- dev_priv->sarea_priv->last_frame = dev_priv->scratch[0] = 0;
- RADEON_WRITE(RADEON_LAST_FRAME_REG, dev_priv->sarea_priv->last_frame);
-
- dev_priv->sarea_priv->last_dispatch = dev_priv->scratch[1] = 0;
- RADEON_WRITE(RADEON_LAST_DISPATCH_REG,
- dev_priv->sarea_priv->last_dispatch);
-
- dev_priv->sarea_priv->last_clear = dev_priv->scratch[2] = 0;
- RADEON_WRITE(RADEON_LAST_CLEAR_REG, dev_priv->sarea_priv->last_clear);
-
- /* Set ring buffer size */
-#ifdef __BIG_ENDIAN
- RADEON_WRITE(RADEON_CP_RB_CNTL,
- dev_priv->ring.size_l2qw | RADEON_BUF_SWAP_32BIT);
-#else
- RADEON_WRITE(RADEON_CP_RB_CNTL, dev_priv->ring.size_l2qw);
-#endif
-
- radeon_do_wait_for_idle(dev_priv);
-
- /* Turn on bus mastering */
- tmp = RADEON_READ(RADEON_BUS_CNTL) & ~RADEON_BUS_MASTER_DIS;
- RADEON_WRITE(RADEON_BUS_CNTL, tmp);
-
- /* Sync everything up */
- RADEON_WRITE(RADEON_ISYNC_CNTL,
- (RADEON_ISYNC_ANY2D_IDLE3D |
- RADEON_ISYNC_ANY3D_IDLE2D |
- RADEON_ISYNC_WAIT_IDLEGUI |
- RADEON_ISYNC_CPSCRATCH_IDLEGUI));
}
/* Enable or disable PCI-E GART on the chip */
@@ -1496,6 +1511,9 @@
dev_priv->fb_location = (RADEON_READ(RADEON_MC_FB_LOCATION)
& 0xffff) << 16;
+ dev_priv->fb_size =
+ ((RADEON_READ(RADEON_MC_FB_LOCATION) & 0xffff0000u) + 0x10000)
+ - dev_priv->fb_location;
dev_priv->front_pitch_offset = (((dev_priv->front_pitch / 64) << 22) |
((dev_priv->front_offset
@@ -1510,8 +1528,46 @@
+ dev_priv->fb_location) >> 10));
dev_priv->gart_size = init->gart_size;
- dev_priv->gart_vm_start = dev_priv->fb_location
- + RADEON_READ(RADEON_CONFIG_APER_SIZE);
+
+ /* New let's set the memory map ... */
+ if (dev_priv->new_memmap) {
+ u32 base = 0;
+
+ DRM_INFO("Setting GART location based on new memory map\n");
+
+ /* If using AGP, try to locate the AGP aperture at the same
+ * location in the card and on the bus, though we have to
+ * align it down.
+ */
+#if __OS_HAS_AGP
+ if (dev_priv->flags & CHIP_IS_AGP) {
+ base = dev->agp->base;
+ /* Check if valid */
+ if ((base + dev_priv->gart_size) > dev_priv->fb_location &&
+ base < (dev_priv->fb_location + dev_priv->fb_size)) {
+ DRM_INFO("Can't use AGP base @0x%08lx, won't fit\n",
+ dev->agp->base);
+ base = 0;
+ }
+ }
+#endif
+ /* If not or if AGP is at 0 (Macs), try to put it elsewhere */
+ if (base == 0) {
+ base = dev_priv->fb_location + dev_priv->fb_size;
+ if (((base + dev_priv->gart_size) & 0xfffffffful)
+ < base)
+ base = dev_priv->fb_location
+ - dev_priv->gart_size;
+ }
+ dev_priv->gart_vm_start = base & 0xffc00000u;
+ if (dev_priv->gart_vm_start != base)
+ DRM_INFO("GART aligned down from 0x%08x to 0x%08x\n",
+ base, dev_priv->gart_vm_start);
+ } else {
+ DRM_INFO("Setting GART location based on old memory map\n");
+ dev_priv->gart_vm_start = dev_priv->fb_location +
+ RADEON_READ(RADEON_CONFIG_APER_SIZE);
+ }
#if __OS_HAS_AGP
if (dev_priv->flags & CHIP_IS_AGP)
@@ -1596,6 +1652,7 @@
dev_priv->last_buf = 0;
radeon_do_engine_reset(dev);
+ radeon_test_writeback(dev_priv);
return 0;
}
diff --git a/drivers/char/drm/radeon_drm.h b/drivers/char/drm/radeon_drm.h
index 9c177a6..bb63e68 100644
--- a/drivers/char/drm/radeon_drm.h
+++ b/drivers/char/drm/radeon_drm.h
@@ -697,6 +697,7 @@
#define RADEON_SETPARAM_FB_LOCATION 1 /* determined framebuffer location */
#define RADEON_SETPARAM_SWITCH_TILING 2 /* enable/disable color tiling */
#define RADEON_SETPARAM_PCIGART_LOCATION 3 /* PCI Gart Location */
+#define RADEON_SETPARAM_NEW_MEMMAP 4 /* Use new memory map */
/* 1.14: Clients can allocate/free a surface
*/
diff --git a/drivers/char/drm/radeon_drv.h b/drivers/char/drm/radeon_drv.h
index 1f7d2ab..a0c1988 100644
--- a/drivers/char/drm/radeon_drv.h
+++ b/drivers/char/drm/radeon_drv.h
@@ -38,7 +38,7 @@
#define DRIVER_NAME "radeon"
#define DRIVER_DESC "ATI Radeon"
-#define DRIVER_DATE "20051229"
+#define DRIVER_DATE "20060225"
/* Interface history:
*
@@ -91,9 +91,10 @@
* 1.20- Add support for r300 texrect
* 1.21- Add support for card type getparam
* 1.22- Add support for texture cache flushes (R300_TX_CNTL)
+ * 1.23- Add new radeon memory map work from benh
*/
#define DRIVER_MAJOR 1
-#define DRIVER_MINOR 22
+#define DRIVER_MINOR 23
#define DRIVER_PATCHLEVEL 0
/*
@@ -138,7 +139,8 @@
CHIP_IS_PCIE = 0x00200000UL,
};
-#define GET_RING_HEAD(dev_priv) DRM_READ32( (dev_priv)->ring_rptr, 0 )
+#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 {
@@ -199,6 +201,8 @@
drm_radeon_sarea_t *sarea_priv;
u32 fb_location;
+ u32 fb_size;
+ int new_memmap;
int gart_size;
u32 gart_vm_start;
diff --git a/drivers/char/drm/radeon_state.c b/drivers/char/drm/radeon_state.c
index 7bc2751..56e56b8 100644
--- a/drivers/char/drm/radeon_state.c
+++ b/drivers/char/drm/radeon_state.c
@@ -45,22 +45,53 @@
u32 off = *offset;
struct drm_radeon_driver_file_fields *radeon_priv;
- if (off >= dev_priv->fb_location &&
- off < (dev_priv->gart_vm_start + dev_priv->gart_size))
+ /* Hrm ... the story of the offset ... So this function converts
+ * the various ideas of what userland clients might have for an
+ * offset in the card address space into an offset into the card
+ * address space :) So with a sane client, it should just keep
+ * the value intact and just do some boundary checking. However,
+ * not all clients are sane. Some older clients pass us 0 based
+ * offsets relative to the start of the framebuffer and some may
+ * assume the AGP aperture it appended to the framebuffer, so we
+ * try to detect those cases and fix them up.
+ *
+ * Note: It might be a good idea here to make sure the offset lands
+ * in some "allowed" area to protect things like the PCIE GART...
+ */
+
+ /* First, the best case, the offset already lands in either the
+ * framebuffer or the GART mapped space
+ */
+ if ((off >= dev_priv->fb_location &&
+ off < (dev_priv->fb_location + dev_priv->fb_size)) ||
+ (off >= dev_priv->gart_vm_start &&
+ off < (dev_priv->gart_vm_start + dev_priv->gart_size)))
return 0;
- radeon_priv = filp_priv->driver_priv;
- off += radeon_priv->radeon_fb_delta;
+ /* Ok, that didn't happen... now check if we have a zero based
+ * offset that fits in the framebuffer + gart space, apply the
+ * magic offset we get from SETPARAM or calculated from fb_location
+ */
+ if (off < (dev_priv->fb_size + dev_priv->gart_size)) {
+ radeon_priv = filp_priv->driver_priv;
+ off += radeon_priv->radeon_fb_delta;
+ }
- DRM_DEBUG("offset fixed up to 0x%x\n", off);
+ /* Finally, assume we aimed at a GART offset if beyond the fb */
+ if (off > (dev_priv->fb_location + dev_priv->fb_size))
+ off = off - (dev_priv->fb_location + dev_priv->fb_size) +
+ dev_priv->gart_vm_start;
- if (off < dev_priv->fb_location ||
- off >= (dev_priv->gart_vm_start + dev_priv->gart_size))
- return DRM_ERR(EINVAL);
-
- *offset = off;
-
- return 0;
+ /* Now recheck and fail if out of bounds */
+ if ((off >= dev_priv->fb_location &&
+ off < (dev_priv->fb_location + dev_priv->fb_size)) ||
+ (off >= dev_priv->gart_vm_start &&
+ off < (dev_priv->gart_vm_start + dev_priv->gart_size))) {
+ DRM_DEBUG("offset fixed up to 0x%x\n", off);
+ *offset = off;
+ return 0;
+ }
+ return DRM_ERR(EINVAL);
}
static __inline__ int radeon_check_and_fixup_packets(drm_radeon_private_t *
@@ -3012,6 +3043,9 @@
case RADEON_SETPARAM_PCIGART_LOCATION:
dev_priv->pcigart_offset = sp.value;
break;
+ case RADEON_SETPARAM_NEW_MEMMAP:
+ dev_priv->new_memmap = sp.value;
+ break;
default:
DRM_DEBUG("Invalid parameter %d\n", sp.param);
return DRM_ERR(EINVAL);