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drm/radeon/kms: wait for cp idle before stopping it.

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If we stop CP and that it's still processing thing GPU hang might
happen, this patch wait for CP idle (the wait can timeout) so we
can avoid shutting down CP at bad time. This is especialy usefull
when reseting the GPU as it seems GPU reset fails to properly reset
CP when the CP wasn't stop after being idle.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jerome Glisse 2009-09-09 22:23:45 +02:00 committed by Dave Airlie
parent 5d93b135fc
commit 45600232b3
2 changed files with 78 additions and 0 deletions
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18
drivers/gpu/drm/radeon/r100.c
View File

@ -487,6 +487,21 @@ int r100_copy_blit(struct radeon_device *rdev,
/*
* CP
*/
static int r100_cp_wait_for_idle(struct radeon_device *rdev)
{
unsigned i;
u32 tmp;
for (i = 0; i < rdev->usec_timeout; i++) {
tmp = RREG32(R_000E40_RBBM_STATUS);
if (!G_000E40_CP_CMDSTRM_BUSY(tmp)) {
return 0;
}
udelay(1);
}
return -1;
}
void r100_ring_start(struct radeon_device *rdev)
{
int r;
@ -715,6 +730,9 @@ int r100_cp_init(struct radeon_device *rdev, unsigned ring_size)
void r100_cp_fini(struct radeon_device *rdev)
{
if (r100_cp_wait_for_idle(rdev)) {
DRM_ERROR("Wait for CP idle timeout, shutting down CP.\n");
}
/* Disable ring */
rdev->cp.ready = false;
WREG32(RADEON_CP_CSQ_CNTL, 0);

60
drivers/gpu/drm/radeon/r100d.h
View File

@ -73,4 +73,64 @@
#define CP_PACKET0_GET_ONE_REG_WR(h) (((h) >> 15) & 1)
#define CP_PACKET3_GET_OPCODE(h) (((h) >> 8) & 0xFF)
/* Registers */
#define R_000E40_RBBM_STATUS 0x000E40
#define S_000E40_CMDFIFO_AVAIL(x) (((x) & 0x7F) << 0)
#define G_000E40_CMDFIFO_AVAIL(x) (((x) >> 0) & 0x7F)
#define C_000E40_CMDFIFO_AVAIL 0xFFFFFF80
#define S_000E40_HIRQ_ON_RBB(x) (((x) & 0x1) << 8)
#define G_000E40_HIRQ_ON_RBB(x) (((x) >> 8) & 0x1)
#define C_000E40_HIRQ_ON_RBB 0xFFFFFEFF
#define S_000E40_CPRQ_ON_RBB(x) (((x) & 0x1) << 9)
#define G_000E40_CPRQ_ON_RBB(x) (((x) >> 9) & 0x1)
#define C_000E40_CPRQ_ON_RBB 0xFFFFFDFF
#define S_000E40_CFRQ_ON_RBB(x) (((x) & 0x1) << 10)
#define G_000E40_CFRQ_ON_RBB(x) (((x) >> 10) & 0x1)
#define C_000E40_CFRQ_ON_RBB 0xFFFFFBFF
#define S_000E40_HIRQ_IN_RTBUF(x) (((x) & 0x1) << 11)
#define G_000E40_HIRQ_IN_RTBUF(x) (((x) >> 11) & 0x1)
#define C_000E40_HIRQ_IN_RTBUF 0xFFFFF7FF
#define S_000E40_CPRQ_IN_RTBUF(x) (((x) & 0x1) << 12)
#define G_000E40_CPRQ_IN_RTBUF(x) (((x) >> 12) & 0x1)
#define C_000E40_CPRQ_IN_RTBUF 0xFFFFEFFF
#define S_000E40_CFRQ_IN_RTBUF(x) (((x) & 0x1) << 13)
#define G_000E40_CFRQ_IN_RTBUF(x) (((x) >> 13) & 0x1)
#define C_000E40_CFRQ_IN_RTBUF 0xFFFFDFFF
#define S_000E40_CF_PIPE_BUSY(x) (((x) & 0x1) << 14)
#define G_000E40_CF_PIPE_BUSY(x) (((x) >> 14) & 0x1)
#define C_000E40_CF_PIPE_BUSY 0xFFFFBFFF
#define S_000E40_ENG_EV_BUSY(x) (((x) & 0x1) << 15)
#define G_000E40_ENG_EV_BUSY(x) (((x) >> 15) & 0x1)
#define C_000E40_ENG_EV_BUSY 0xFFFF7FFF
#define S_000E40_CP_CMDSTRM_BUSY(x) (((x) & 0x1) << 16)
#define G_000E40_CP_CMDSTRM_BUSY(x) (((x) >> 16) & 0x1)
#define C_000E40_CP_CMDSTRM_BUSY 0xFFFEFFFF
#define S_000E40_E2_BUSY(x) (((x) & 0x1) << 17)
#define G_000E40_E2_BUSY(x) (((x) >> 17) & 0x1)
#define C_000E40_E2_BUSY 0xFFFDFFFF
#define S_000E40_RB2D_BUSY(x) (((x) & 0x1) << 18)
#define G_000E40_RB2D_BUSY(x) (((x) >> 18) & 0x1)
#define C_000E40_RB2D_BUSY 0xFFFBFFFF
#define S_000E40_RB3D_BUSY(x) (((x) & 0x1) << 19)
#define G_000E40_RB3D_BUSY(x) (((x) >> 19) & 0x1)
#define C_000E40_RB3D_BUSY 0xFFF7FFFF
#define S_000E40_SE_BUSY(x) (((x) & 0x1) << 20)
#define G_000E40_SE_BUSY(x) (((x) >> 20) & 0x1)
#define C_000E40_SE_BUSY 0xFFEFFFFF
#define S_000E40_RE_BUSY(x) (((x) & 0x1) << 21)
#define G_000E40_RE_BUSY(x) (((x) >> 21) & 0x1)
#define C_000E40_RE_BUSY 0xFFDFFFFF
#define S_000E40_TAM_BUSY(x) (((x) & 0x1) << 22)
#define G_000E40_TAM_BUSY(x) (((x) >> 22) & 0x1)
#define C_000E40_TAM_BUSY 0xFFBFFFFF
#define S_000E40_TDM_BUSY(x) (((x) & 0x1) << 23)
#define G_000E40_TDM_BUSY(x) (((x) >> 23) & 0x1)
#define C_000E40_TDM_BUSY 0xFF7FFFFF
#define S_000E40_PB_BUSY(x) (((x) & 0x1) << 24)
#define G_000E40_PB_BUSY(x) (((x) >> 24) & 0x1)
#define C_000E40_PB_BUSY 0xFEFFFFFF
#define S_000E40_GUI_ACTIVE(x) (((x) & 0x1) << 31)
#define G_000E40_GUI_ACTIVE(x) (((x) >> 31) & 0x1)
#define C_000E40_GUI_ACTIVE 0x7FFFFFFF
#endif