The CMASK RAM is for colorbuffer compression (used in conjunction
with MSAA). Only one user (filp) can access it.
The CMASK RAM access is managed in the same way as Hyper-Z, but there is
a separate ioctl, because an app that uses MSAA does not necessarily
have to use zbuffering.
Signed-off-by: Marek OlÅÃk <maraeo@xxxxxxxxx>
---
drivers/gpu/drm/radeon/r300.c | 9 ++++++++
drivers/gpu/drm/radeon/r300d.h | 1 +
drivers/gpu/drm/radeon/radeon.h | 3 +-
drivers/gpu/drm/radeon/radeon_drv.c | 2 +-
drivers/gpu/drm/radeon/radeon_kms.c | 39 ++++++++++++++++++++++++----------
include/drm/radeon_drm.h | 1 +
6 files changed, 41 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index 36b4f7b..23fee54 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -745,6 +745,11 @@ static int r300_packet0_check(struct radeon_cs_parser *p,
break;
case 0x4E00:
/* RB3D_CCTL */
+ if ((idx_value & (1 << 10)) && /* CMASK_ENABLE */
+ p->rdev->cmask_filp != p->filp) {
+ DRM_ERROR("Invalid RB3D_CCTL: Cannot enable CMASK.\n");
+ return -EINVAL;
+ }
track->num_cb = ((idx_value >> 5) & 0x3) + 1;
break;
case 0x4E38:
@@ -1206,6 +1211,10 @@ static int r300_packet3_check(struct radeon_cs_parser *p,
if (p->rdev->hyperz_filp != p->filp)
return -EINVAL;
break;
+ case PACKET3_3D_CLEAR_CMASK:
+ if (p->rdev->cmask_filp != p->filp)
+ return -EINVAL;
+ break;
case PACKET3_NOP:
break;
default:
diff --git a/drivers/gpu/drm/radeon/r300d.h b/drivers/gpu/drm/radeon/r300d.h
index 0c036c6..1f519a5 100644
--- a/drivers/gpu/drm/radeon/r300d.h
+++ b/drivers/gpu/drm/radeon/r300d.h
@@ -54,6 +54,7 @@
#define PACKET3_3D_DRAW_IMMD_2 0x35
#define PACKET3_3D_DRAW_INDX_2 0x36
#define PACKET3_3D_CLEAR_HIZ 0x37
+#define PACKET3_3D_CLEAR_CMASK 0x38
#define PACKET3_BITBLT_MULTI 0x9B
#define PACKET0(reg, n) (CP_PACKET0 | \
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 431d418..02712bc 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1168,8 +1168,9 @@ struct radeon_device {
bool powered_down;
struct notifier_block acpi_nb;
- /* only one userspace can use Hyperz features at a time */
+ /* only one userspace can use Hyperz features or CMASK at a time */
struct drm_file *hyperz_filp;
+ struct drm_file *cmask_filp;
/* i2c buses */
struct radeon_i2c_chan *i2c_bus[RADEON_MAX_I2C_BUS];
};
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index 520b776..79957ed 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -48,7 +48,7 @@
* - 2.5.0 - add get accel 2 to work around ddx breakage for evergreen
* - 2.6.0 - add tiling config query (r6xx+), add initial HiZ support (r300->r500)
* 2.7.0 - fixups for r600 2D tiling support. (no external ABI change), add eg dyn gpr regs
- * 2.8.0 - pageflip support, r500 US_FORMAT regs. r500 ARGB2101010 colorbuf
+ * 2.8.0 - pageflip support, r500 US_FORMAT regs. r500 ARGB2101010 colorbuf, r300->r500 CMASK
*/
#define KMS_DRIVER_MAJOR 2
#define KMS_DRIVER_MINOR 8
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 4bf423c..9db428b 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -96,9 +96,27 @@ out:
return r;
}
+static void radeon_set_filp_rights(struct drm_device *dev,
+ struct drm_file **owner,
+ struct drm_file *applier,
+ uint32_t *value)
+{
+ mutex_lock(&dev->struct_mutex);
+ if (*value == 1) {
+ /* wants rights */
+ if (!*owner)
+ *owner = applier;
+ } else if (*value == 0) {
+ /* revokes rights */
+ if (*owner == applier)
+ *owner = NULL;
+ }
+ *value = *owner == applier ? 1 : 0;
+ mutex_unlock(&dev->struct_mutex);
+}
/*
- * Userspace get informations ioctl
+ * Userspace get information ioctl
*/
int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
{
@@ -173,18 +191,15 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
DRM_DEBUG_KMS("WANT_HYPERZ: invalid value %d\n", value);
return -EINVAL;
}
- mutex_lock(&dev->struct_mutex);
- if (value == 1) {
- /* wants hyper-z */
- if (!rdev->hyperz_filp)
- rdev->hyperz_filp = filp;
- } else if (value == 0) {
- /* revokes hyper-z */
- if (rdev->hyperz_filp == filp)
- rdev->hyperz_filp = NULL;
+ radeon_set_filp_rights(dev, &rdev->hyperz_filp, filp, &value);
+ break;
+ case RADEON_INFO_WANT_CMASK:
+ /* The same logic as Hyper-Z. */
+ if (value >= 2) {
+ DRM_DEBUG_KMS("WANT_CMASK: invalid value %d\n", value);
+ return -EINVAL;
}
- value = rdev->hyperz_filp == filp ? 1 : 0;
- mutex_unlock(&dev->struct_mutex);
+ radeon_set_filp_rights(dev, &rdev->cmask_filp, filp, &value);
break;
default:
DRM_DEBUG_KMS("Invalid request %d\n", info->request);
diff --git a/include/drm/radeon_drm.h b/include/drm/radeon_drm.h
index 10f8b53..e95a86b 100644
--- a/include/drm/radeon_drm.h
+++ b/include/drm/radeon_drm.h
@@ -906,6 +906,7 @@ struct drm_radeon_cs {
#define RADEON_INFO_ACCEL_WORKING2 0x05
#define RADEON_INFO_TILING_CONFIG 0x06
#define RADEON_INFO_WANT_HYPERZ 0x07
+#define RADEON_INFO_WANT_CMASK 0x08 /* get access to CMASK on r300 */
struct drm_radeon_info {
uint32_t request;
--
1.7.1
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