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drm/amdgpu: Add support for resuming SDMA queues w/o HWS 

Save wptr in hqd_sdma_destroy, restore it in hqd_sdma_load. Also
read updated wptr from user mode when resuming an SDMA queue.

Signed-off-by: Jay Cornwall <Jay.Cornwall@amd.com>
Signed-off-by: Yong Zhao <yong.zhao@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
hifive-unleashed-5.1
Felix Kuehling 2017-11-01 19:21:59 -04:00 committed by Oded Gabbay
parent 7ce66118aa
commit fd0f0762dc
2 changed files with 23 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c
View File

@ -412,10 +412,17 @@ static int kgd_hqd_sdma_load(struct kgd_dev *kgd, void *mqd,
WREG32(mmSDMA0_GFX_CONTEXT_CNTL, data);
}
WREG32(sdma_base_addr + mmSDMA0_RLC0_DOORBELL,
m->sdma_rlc_doorbell);
WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_RPTR, 0);
WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_WPTR, 0);
data = REG_SET_FIELD(m->sdma_rlc_doorbell, SDMA0_RLC0_DOORBELL,
ENABLE, 1);
WREG32(sdma_base_addr + mmSDMA0_RLC0_DOORBELL, data);
WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_RPTR, m->sdma_rlc_rb_rptr);
if (read_user_wptr(mm, wptr, data))
WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_WPTR, data);
else
WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_WPTR,
m->sdma_rlc_rb_rptr);
WREG32(sdma_base_addr + mmSDMA0_RLC0_VIRTUAL_ADDR,
m->sdma_rlc_virtual_addr);
WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_BASE, m->sdma_rlc_rb_base);
@ -425,8 +432,10 @@ static int kgd_hqd_sdma_load(struct kgd_dev *kgd, void *mqd,
m->sdma_rlc_rb_rptr_addr_lo);
WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_RPTR_ADDR_HI,
m->sdma_rlc_rb_rptr_addr_hi);
WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_CNTL,
m->sdma_rlc_rb_cntl);
data = REG_SET_FIELD(m->sdma_rlc_rb_cntl, SDMA0_RLC0_RB_CNTL,
RB_ENABLE, 1);
WREG32(sdma_base_addr + mmSDMA0_RLC0_RB_CNTL, data);
return 0;
}
@ -577,7 +586,7 @@ static int kgd_hqd_sdma_destroy(struct kgd_dev *kgd, void *mqd,
struct cik_sdma_rlc_registers *m;
uint32_t sdma_base_addr;
uint32_t temp;
int timeout = utimeout;
unsigned long end_jiffies = (utimeout * HZ / 1000) + jiffies;
m = get_sdma_mqd(mqd);
sdma_base_addr = get_sdma_base_addr(m);
@ -590,10 +599,9 @@ static int kgd_hqd_sdma_destroy(struct kgd_dev *kgd, void *mqd,
temp = RREG32(sdma_base_addr + mmSDMA0_RLC0_CONTEXT_STATUS);
if (temp & SDMA0_STATUS_REG__RB_CMD_IDLE__SHIFT)
break;
if (timeout <= 0)
if (time_after(jiffies, end_jiffies))
return -ETIME;
msleep(20);
timeout -= 20;
usleep_range(500, 1000);
}
WREG32(sdma_base_addr + mmSDMA0_RLC0_DOORBELL, 0);
@ -601,6 +609,8 @@ static int kgd_hqd_sdma_destroy(struct kgd_dev *kgd, void *mqd,
RREG32(sdma_base_addr + mmSDMA0_RLC0_RB_CNTL) |
SDMA0_RLC0_RB_CNTL__RB_ENABLE_MASK);
m->sdma_rlc_rb_rptr = RREG32(sdma_base_addr + mmSDMA0_RLC0_RB_RPTR);
return 0;
}

7
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c
View File

@ -514,7 +514,7 @@ static int kgd_hqd_sdma_destroy(struct kgd_dev *kgd, void *mqd,
struct cik_sdma_rlc_registers *m;
uint32_t sdma_base_addr;
uint32_t temp;
int timeout = utimeout;
unsigned long end_jiffies = (utimeout * HZ / 1000) + jiffies;
m = get_sdma_mqd(mqd);
sdma_base_addr = get_sdma_base_addr(m);
@ -527,10 +527,9 @@ static int kgd_hqd_sdma_destroy(struct kgd_dev *kgd, void *mqd,
temp = RREG32(sdma_base_addr + mmSDMA0_RLC0_CONTEXT_STATUS);
if (temp & SDMA0_STATUS_REG__RB_CMD_IDLE__SHIFT)
break;
if (timeout <= 0)
if (time_after(jiffies, end_jiffies))
return -ETIME;
msleep(20);
timeout -= 20;
usleep_range(500, 1000);
}
WREG32(sdma_base_addr + mmSDMA0_RLC0_DOORBELL, 0);