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Subject[PATCH 4/8] drm/i915/gvt: Retrieve the guest gm base address from PVINFO
Date
From: Yulei Zhang <yulei.zhang@intel.com>

As after migration the host gm base address will be changed due
to resource re-allocation, in order to make sure the guest gm
address doesn't change with that to retrieve the guest gm base
address from PVINFO.

Signed-off-by: Yulei Zhang <yulei.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
---
drivers/gpu/drm/i915/gvt/cfg_space.c | 3 ++-
drivers/gpu/drm/i915/gvt/gtt.c | 8 ++++----
drivers/gpu/drm/i915/gvt/gvt.h | 22 ++++++++++++++++++----
3 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/cfg_space.c b/drivers/gpu/drm/i915/gvt/cfg_space.c
index 19cf1bbe059d..272f8dba7b21 100644
--- a/drivers/gpu/drm/i915/gvt/cfg_space.c
+++ b/drivers/gpu/drm/i915/gvt/cfg_space.c
@@ -33,6 +33,7 @@

#include "i915_drv.h"
#include "gvt.h"
+#include "i915_pvinfo.h"

enum {
INTEL_GVT_PCI_BAR_GTTMMIO = 0,
@@ -133,7 +134,7 @@ static int map_aperture(struct intel_vgpu *vgpu, bool map)
else
val = *(u32 *)(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_2);

- first_gfn = (val + vgpu_aperture_offset(vgpu)) >> PAGE_SHIFT;
+ first_gfn = (val + vgpu_guest_aperture_offset(vgpu)) >> PAGE_SHIFT;

ret = intel_gvt_hypervisor_map_gfn_to_mfn(vgpu, first_gfn,
aperture_pa >> PAGE_SHIFT,
diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
index 8a5d26d1d402..753ad975c958 100644
--- a/drivers/gpu/drm/i915/gvt/gtt.c
+++ b/drivers/gpu/drm/i915/gvt/gtt.c
@@ -70,10 +70,10 @@ int intel_gvt_ggtt_gmadr_g2h(struct intel_vgpu *vgpu, u64 g_addr, u64 *h_addr)

if (vgpu_gmadr_is_aperture(vgpu, g_addr))
*h_addr = vgpu_aperture_gmadr_base(vgpu)
- + (g_addr - vgpu_aperture_offset(vgpu));
+ + (g_addr - vgpu_guest_aperture_gmadr_base(vgpu));
else
*h_addr = vgpu_hidden_gmadr_base(vgpu)
- + (g_addr - vgpu_hidden_offset(vgpu));
+ + (g_addr - vgpu_guest_hidden_gmadr_base(vgpu));
return 0;
}

@@ -85,10 +85,10 @@ int intel_gvt_ggtt_gmadr_h2g(struct intel_vgpu *vgpu, u64 h_addr, u64 *g_addr)
return -EACCES;

if (gvt_gmadr_is_aperture(vgpu->gvt, h_addr))
- *g_addr = vgpu_aperture_gmadr_base(vgpu)
+ *g_addr = vgpu_guest_aperture_gmadr_base(vgpu)
+ (h_addr - gvt_aperture_gmadr_base(vgpu->gvt));
else
- *g_addr = vgpu_hidden_gmadr_base(vgpu)
+ *g_addr = vgpu_guest_hidden_gmadr_base(vgpu)
+ (h_addr - gvt_hidden_gmadr_base(vgpu->gvt));
return 0;
}
diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index 8621d0f5fd26..1f5ef59a36ac 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -424,6 +424,20 @@ int intel_gvt_load_firmware(struct intel_gvt *gvt);
#define vgpu_fence_base(vgpu) (vgpu->fence.base)
#define vgpu_fence_sz(vgpu) (vgpu->fence.size)

+/* Aperture/GM space definitions for vGPU Guest view point */
+#define vgpu_guest_aperture_offset(vgpu) \
+ vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.mappable_gmadr.base))
+#define vgpu_guest_hidden_offset(vgpu) \
+ vgpu_vreg_t(vgpu, vgtif_reg(avail_rs.nonmappable_gmadr.base))
+
+#define vgpu_guest_aperture_gmadr_base(vgpu) (vgpu_guest_aperture_offset(vgpu))
+#define vgpu_guest_aperture_gmadr_end(vgpu) \
+ (vgpu_guest_aperture_gmadr_base(vgpu) + vgpu_aperture_sz(vgpu) - 1)
+
+#define vgpu_guest_hidden_gmadr_base(vgpu) (vgpu_guest_hidden_offset(vgpu))
+#define vgpu_guest_hidden_gmadr_end(vgpu) \
+ (vgpu_guest_hidden_gmadr_base(vgpu) + vgpu_hidden_sz(vgpu) - 1)
+
struct intel_vgpu_creation_params {
__u64 handle;
__u64 low_gm_sz; /* in MB */
@@ -499,12 +513,12 @@ void intel_gvt_deactivate_vgpu(struct intel_vgpu *vgpu);

/* validating GM functions */
#define vgpu_gmadr_is_aperture(vgpu, gmadr) \
- ((gmadr >= vgpu_aperture_gmadr_base(vgpu)) && \
- (gmadr <= vgpu_aperture_gmadr_end(vgpu)))
+ ((gmadr >= vgpu_guest_aperture_gmadr_base(vgpu)) && \
+ (gmadr <= vgpu_guest_aperture_gmadr_end(vgpu)))

#define vgpu_gmadr_is_hidden(vgpu, gmadr) \
- ((gmadr >= vgpu_hidden_gmadr_base(vgpu)) && \
- (gmadr <= vgpu_hidden_gmadr_end(vgpu)))
+ ((gmadr >= vgpu_guest_hidden_gmadr_base(vgpu)) && \
+ (gmadr <= vgpu_guest_hidden_gmadr_end(vgpu)))

#define vgpu_gmadr_is_valid(vgpu, gmadr) \
((vgpu_gmadr_is_aperture(vgpu, gmadr) || \
--
2.17.1
\
 
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