diff options
| author | Xiaolin Zhang <xiaolin.zhang@intel.com> | 2019-06-03 10:55:53 +0800 |
|---|---|---|
| committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2019-06-03 13:18:36 +0800 |
| commit | 15e7f52a4596b496ce3da2fa4c1f94c6fb0023f2 (patch) | |
| tree | cd80b905a97fafd33ca1c9bb165a2b51b417cd10 /drivers/gpu/drm/i915/gvt/reg.h | |
| parent | 3fcb01f8ab9d1c1cdd68142078243b675e17041d (diff) | |
drm/i915/gvt: save RING_HEAD into vreg when vgpu switched out
Save RING_HEAD into vgpu reg when vgpu switched out and report
it's value back to guest.
v6: addressed comment for ring head wrap count support. (Zhenyu)
v5: ring head wrap count support.
v4: updated HEAD/TAIL with guest value, not host value. (Yan Zhao)
v3: save RING HEAD/TAIL vgpu reg in save_ring_hw_state. (Zhenyu Wang)
v2: save RING_TAIL as well during vgpu mmio switch to meet ring_is_idle
condition. (Fred Gao)
v1: based on input from Weinan. (Weinan Li)
[zhenyuw: Include this fix for possible future guest kernel that
would utilize RING_HEAD for hangcheck.]
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Xiaolin Zhang <xiaolin.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/reg.h')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/reg.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gvt/reg.h b/drivers/gpu/drm/i915/gvt/reg.h index 33aaa14bfdde..5b66e14c5b7b 100644 --- a/drivers/gpu/drm/i915/gvt/reg.h +++ b/drivers/gpu/drm/i915/gvt/reg.h @@ -102,6 +102,8 @@ #define FORCEWAKE_ACK_MEDIA_GEN9_REG 0x0D88 #define FORCEWAKE_ACK_HSW_REG 0x130044 +#define RB_HEAD_WRAP_CNT_MAX ((1 << 11) - 1) +#define RB_HEAD_WRAP_CNT_OFF 21 #define RB_HEAD_OFF_MASK ((1U << 21) - (1U << 2)) #define RB_TAIL_OFF_MASK ((1U << 21) - (1U << 3)) #define RB_TAIL_SIZE_MASK ((1U << 21) - (1U << 12)) |