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| author | Ben Goz <ben.goz@amd.com> | 2015-01-03 22:12:35 +0200 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@amd.com> | 2015-01-09 22:26:06 +0200 |
| commit | d7a60d8ea5cd4560e0496d2683643d2e4930e609 (patch) | |
| tree | 38f85edea4f1dcd6541456f0fef879821c06abe6 /drivers/gpu/drm/radeon/cik_sdma.c | |
| parent | 85dfaef34179a6449ebce34a1a9f1c032c3e1b88 (diff) | |
| download | linux-d7a60d8ea5cd4560e0496d2683643d2e4930e609.tar.gz linux-d7a60d8ea5cd4560e0496d2683643d2e4930e609.tar.bz2 linux-d7a60d8ea5cd4560e0496d2683643d2e4930e609.zip | |
drm/radeon: Enable sdma preemption
This patch adds to radeon the enablement of sdma preemption.
This is needed to support HWS of SDMA user-mode queues.
Signed-off-by: Ben Goz <ben.goz@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/cik_sdma.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/cik_sdma.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/cik_sdma.c b/drivers/gpu/drm/radeon/cik_sdma.c index dde5c7e29eb2..1f4ded181662 100644 --- a/drivers/gpu/drm/radeon/cik_sdma.c +++ b/drivers/gpu/drm/radeon/cik_sdma.c @@ -283,6 +283,33 @@ static void cik_sdma_rlc_stop(struct radeon_device *rdev) } /** + * cik_sdma_ctx_switch_enable - enable/disable sdma engine preemption + * + * @rdev: radeon_device pointer + * @enable: enable/disable preemption. + * + * Halt or unhalt the async dma engines (CIK). + */ +void cik_sdma_ctx_switch_enable(struct radeon_device *rdev, bool enable) +{ + uint32_t reg_offset, value; + int i; + + for (i = 0; i < 2; i++) { + if (i == 0) + reg_offset = SDMA0_REGISTER_OFFSET; + else + reg_offset = SDMA1_REGISTER_OFFSET; + value = RREG32(SDMA0_CNTL + reg_offset); + if (enable) + value |= AUTO_CTXSW_ENABLE; + else + value &= ~AUTO_CTXSW_ENABLE; + WREG32(SDMA0_CNTL + reg_offset, value); + } +} + +/** * cik_sdma_enable - stop the async dma engines * * @rdev: radeon_device pointer @@ -312,6 +339,8 @@ void cik_sdma_enable(struct radeon_device *rdev, bool enable) me_cntl |= SDMA_HALT; WREG32(SDMA0_ME_CNTL + reg_offset, me_cntl); } + + cik_sdma_ctx_switch_enable(rdev, enable); } /** |