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drm/amdgpu: Enable DISABLE_BARRIER_WAITCNT for Arcturus 

In previous gfx9 parts, S_BARRIER shader instructions are implicitly
S_WAITCNT 0 instructions as well. This setting turns off that
mechanism in Arcturus and beyond. With this, shaders must follow the
ISA guide insofar as putting in explicit S_WAITCNT operations even
after an S_BARRIER.

v2: Fix patch title to list component

Signed-off-by: Joseph Greathouse <Joseph.Greathouse@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Joseph Greathouse 2020-01-27 16:08:11 -06:00 committed by Alex Deucher
parent 269a0bf79b
commit 18c6b74e7c
2 changed files with 21 additions and 2 deletions
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17
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
View File

@ -2441,6 +2441,22 @@ static void gfx_v9_0_init_gds_vmid(struct amdgpu_device *adev)
}
}
static void gfx_v9_0_init_sq_config(struct amdgpu_device *adev)
{
uint32_t tmp;
switch (adev->asic_type) {
case CHIP_ARCTURUS:
tmp = RREG32_SOC15(GC, 0, mmSQ_CONFIG);
tmp = REG_SET_FIELD(tmp, SQ_CONFIG,
DISABLE_BARRIER_WAITCNT, 1);
WREG32_SOC15(GC, 0, mmSQ_CONFIG, tmp);
break;
default:
break;
};
}
static void gfx_v9_0_constants_init(struct amdgpu_device *adev)
{
u32 tmp;
@ -2486,6 +2502,7 @@ static void gfx_v9_0_constants_init(struct amdgpu_device *adev)
gfx_v9_0_init_compute_vmid(adev);
gfx_v9_0_init_gds_vmid(adev);
gfx_v9_0_init_sq_config(adev);
}
static void gfx_v9_0_wait_for_rlc_serdes(struct amdgpu_device *adev)

6
drivers/gpu/drm/amd/include/asic_reg/gc/gc_9_0_sh_mask.h
View File

@ -2060,7 +2060,8 @@
// addressBlock: gc_sqdec
//SQ_CONFIG
#define SQ_CONFIG__UNUSED__SHIFT 0x0
#define SQ_CONFIG__DISABLE_BARRIER_WAITCNT__SHIFT 0x0
#define SQ_CONFIG__UNUSED__SHIFT 0x1
#define SQ_CONFIG__OVERRIDE_ALU_BUSY__SHIFT 0x7
#define SQ_CONFIG__DEBUG_EN__SHIFT 0x8
#define SQ_CONFIG__DEBUG_SINGLE_MEMOP__SHIFT 0x9
@ -2079,7 +2080,8 @@
#define SQ_CONFIG__DISABLE_SP_REDUNDANT_THREAD_GATING__SHIFT 0x1d
#define SQ_CONFIG__DISABLE_FLAT_SOFT_CLAUSE__SHIFT 0x1e
#define SQ_CONFIG__DISABLE_MIMG_SOFT_CLAUSE__SHIFT 0x1f
#define SQ_CONFIG__UNUSED_MASK 0x0000007FL
#define SQ_CONFIG__DISABLE_BARRIER_WAITCNT_MASK 0x00000001L
#define SQ_CONFIG__UNUSED_MASK 0x0000007EL
#define SQ_CONFIG__OVERRIDE_ALU_BUSY_MASK 0x00000080L
#define SQ_CONFIG__DEBUG_EN_MASK 0x00000100L
#define SQ_CONFIG__DEBUG_SINGLE_MEMOP_MASK 0x00000200L