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| author |  Changbin Du <changbin.du@intel.com>
| 2017-01-13 11:16:01 +0800 |
|---|---|---|
| committer |  Zhenyu Wang <zhenyuw@linux.intel.com>
| 2017-01-13 15:05:38 +0800 |
| commit | 97d58f7dd0ff12e5fddeffb40aed845daa628149 (patch) | |
| tree | a24bebdbe0347fa05edbbc9994f38d71fb8e3164 /drivers/gpu | |
| parent | drm/i915/gvt: move mmio init/clean function to mmio.c (diff) | |
| download | linux-97d58f7dd0ff12e5fddeffb40aed845daa628149.tar.gz linux-97d58f7dd0ff12e5fddeffb40aed845daa628149.tar.bz2 linux-97d58f7dd0ff12e5fddeffb40aed845daa628149.zip | |
drm/i915/gvt: introduce intel_vgpu_reset_mmio() to reset mmio space
This patch introduces a new function intel_vgpu_reset_mmio() to
reset vGPU MMIO space (virtual registers of the vGPU). The default
values are loaded as firmware during gvt inititiation.
Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/mmio.c | 39 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/mmio.h | 1 |
2 files changed, 26 insertions, 14 deletions
diff --git a/drivers/gpu/drm/i915/gvt/mmio.c b/drivers/gpu/drm/i915/gvt/mmio.c index f7da735b7919..4df078bc5d04 100644 --- a/drivers/gpu/drm/i915/gvt/mmio.c +++ b/drivers/gpu/drm/i915/gvt/mmio.c @@ -304,6 +304,26 @@ err: return ret; } + +/** + * intel_vgpu_reset_mmio - reset virtual MMIO space + * @vgpu: a vGPU + * + */ +void intel_vgpu_reset_mmio(struct intel_vgpu *vgpu) +{ + struct intel_gvt *gvt = vgpu->gvt; + const struct intel_gvt_device_info *info = &gvt->device_info; + + memcpy(vgpu->mmio.vreg, gvt->firmware.mmio, info->mmio_size); + memcpy(vgpu->mmio.sreg, gvt->firmware.mmio, info->mmio_size); + + vgpu_vreg(vgpu, GEN6_GT_THREAD_STATUS_REG) = 0; + + /* set the bit 0:2(Core C-State ) to C0 */ + vgpu_vreg(vgpu, GEN6_GT_CORE_STATUS) = 0; +} + /** * intel_vgpu_init_mmio - init MMIO space * @vgpu: a vGPU @@ -315,22 +335,13 @@ int intel_vgpu_init_mmio(struct intel_vgpu *vgpu) { const struct intel_gvt_device_info *info = &vgpu->gvt->device_info; - if (vgpu->mmio.vreg) - memset(vgpu->mmio.vreg, 0, info->mmio_size * 2); - else { - vgpu->mmio.vreg = vzalloc(info->mmio_size * 2); - if (!vgpu->mmio.vreg) - return -ENOMEM; - } - vgpu->mmio.sreg = vgpu->mmio.vreg + info->mmio_size; + vgpu->mmio.vreg = vzalloc(info->mmio_size * 2); + if (!vgpu->mmio.vreg) + return -ENOMEM; - memcpy(vgpu->mmio.vreg, vgpu->gvt->firmware.mmio, info->mmio_size); - memcpy(vgpu->mmio.sreg, vgpu->gvt->firmware.mmio, info->mmio_size); - - vgpu_vreg(vgpu, GEN6_GT_THREAD_STATUS_REG) = 0; + vgpu->mmio.sreg = vgpu->mmio.vreg + info->mmio_size; - /* set the bit 0:2(Core C-State ) to C0 */ - vgpu_vreg(vgpu, GEN6_GT_CORE_STATUS) = 0; + intel_vgpu_reset_mmio(vgpu); return 0; } diff --git a/drivers/gpu/drm/i915/gvt/mmio.h b/drivers/gpu/drm/i915/gvt/mmio.h index 1b74ac9650d5..3bc620f56f35 100644 --- a/drivers/gpu/drm/i915/gvt/mmio.h +++ b/drivers/gpu/drm/i915/gvt/mmio.h @@ -87,6 +87,7 @@ struct intel_gvt_mmio_info *intel_gvt_find_mmio_info(struct intel_gvt *gvt, }) int intel_vgpu_init_mmio(struct intel_vgpu *vgpu); +void intel_vgpu_reset_mmio(struct intel_vgpu *vgpu); void intel_vgpu_clean_mmio(struct intel_vgpu *vgpu); int intel_vgpu_gpa_to_mmio_offset(struct intel_vgpu *vgpu, u64 gpa); |