!Fdrivers/gpu/drm/i915/i915_irq.c intel_runtime_pm_disable_interrupts
!Fdrivers/gpu/drm/i915/i915_irq.c intel_runtime_pm_enable_interrupts
</sect2>
+ <sect2>
+ <title>Intel GVT-g Guest Support(vGPU)</title>
+!Pdrivers/gpu/drm/i915/i915_vgpu.c Intel GVT-g guest support
+!Idrivers/gpu/drm/i915/i915_vgpu.c
+ </sect2>
</sect1>
<sect1>
<title>Display Hardware Handling</title>
intel_sdvo.o \
intel_tv.o
+# virtual gpu code
+i915-y += i915_vgpu.o
+
# legacy horrors
i915-y += i915_dma.o \
i915_ums.o
u32 count;
};
+struct i915_virtual_gpu {
+ bool active;
+};
+
struct drm_i915_private {
struct drm_device *dev;
struct kmem_cache *slab;
struct intel_uncore uncore;
+ struct i915_virtual_gpu vgpu;
+
struct intel_gmbus gmbus[GMBUS_NUM_PORTS];
void intel_uncore_forcewake_put(struct drm_i915_private *dev_priv,
enum forcewake_domains domains);
void assert_forcewakes_inactive(struct drm_i915_private *dev_priv);
+static inline bool intel_vgpu_active(struct drm_device *dev)
+{
+ return to_i915(dev)->vgpu.active;
+}
void
i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
--- /dev/null
+/*
+ * Copyright(c) 2011-2015 Intel Corporation. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "intel_drv.h"
+#include "i915_vgpu.h"
+
+/**
+ * DOC: Intel GVT-g guest support
+ *
+ * Intel GVT-g is a graphics virtualization technology which shares the
+ * GPU among multiple virtual machines on a time-sharing basis. Each
+ * virtual machine is presented a virtual GPU (vGPU), which has equivalent
+ * features as the underlying physical GPU (pGPU), so i915 driver can run
+ * seamlessly in a virtual machine. This file provides vGPU specific
+ * optimizations when running in a virtual machine, to reduce the complexity
+ * of vGPU emulation and to improve the overall performance.
+ *
+ * A primary function introduced here is so-called "address space ballooning"
+ * technique. Intel GVT-g partitions global graphics memory among multiple VMs,
+ * so each VM can directly access a portion of the memory without hypervisor's
+ * intervention, e.g. filling textures or queuing commands. However with the
+ * partitioning an unmodified i915 driver would assume a smaller graphics
+ * memory starting from address ZERO, then requires vGPU emulation module to
+ * translate the graphics address between 'guest view' and 'host view', for
+ * all registers and command opcodes which contain a graphics memory address.
+ * To reduce the complexity, Intel GVT-g introduces "address space ballooning",
+ * by telling the exact partitioning knowledge to each guest i915 driver, which
+ * then reserves and prevents non-allocated portions from allocation. Thus vGPU
+ * emulation module only needs to scan and validate graphics addresses without
+ * complexity of address translation.
+ *
+ */
+
+/**
+ * i915_check_vgpu - detect virtual GPU
+ * @dev: drm device *
+ *
+ * This function is called at the initialization stage, to detect whether
+ * running on a vGPU.
+ */
+void i915_check_vgpu(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ uint64_t magic;
+ uint32_t version;
+
+ BUILD_BUG_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
+
+ if (!IS_HASWELL(dev))
+ return;
+
+ magic = readq(dev_priv->regs + vgtif_reg(magic));
+ if (magic != VGT_MAGIC)
+ return;
+
+ version = INTEL_VGT_IF_VERSION_ENCODE(
+ readw(dev_priv->regs + vgtif_reg(version_major)),
+ readw(dev_priv->regs + vgtif_reg(version_minor)));
+ if (version != INTEL_VGT_IF_VERSION) {
+ DRM_INFO("VGT interface version mismatch!\n");
+ return;
+ }
+
+ dev_priv->vgpu.active = true;
+ DRM_INFO("Virtual GPU for Intel GVT-g detected.\n");
+}
--- /dev/null
+/*
+ * Copyright(c) 2011-2015 Intel Corporation. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _I915_VGPU_H_
+#define _I915_VGPU_H_
+
+/* The MMIO offset of the shared info between guest and host emulator */
+#define VGT_PVINFO_PAGE 0x78000
+#define VGT_PVINFO_SIZE 0x1000
+
+/*
+ * The following structure pages are defined in GEN MMIO space
+ * for virtualization. (One page for now)
+ */
+#define VGT_MAGIC 0x4776544776544776 /* 'vGTvGTvG' */
+#define VGT_VERSION_MAJOR 1
+#define VGT_VERSION_MINOR 0
+
+#define INTEL_VGT_IF_VERSION_ENCODE(major, minor) ((major) << 16 | (minor))
+#define INTEL_VGT_IF_VERSION \
+ INTEL_VGT_IF_VERSION_ENCODE(VGT_VERSION_MAJOR, VGT_VERSION_MINOR)
+
+struct vgt_if {
+ uint64_t magic; /* VGT_MAGIC */
+ uint16_t version_major;
+ uint16_t version_minor;
+ uint32_t vgt_id; /* ID of vGT instance */
+ uint32_t rsv1[12]; /* pad to offset 0x40 */
+ /*
+ * Data structure to describe the balooning info of resources.
+ * Each VM can only have one portion of continuous area for now.
+ * (May support scattered resource in future)
+ * (starting from offset 0x40)
+ */
+ struct {
+ /* Aperture register balooning */
+ struct {
+ uint32_t base;
+ uint32_t size;
+ } mappable_gmadr; /* aperture */
+ /* GMADR register balooning */
+ struct {
+ uint32_t base;
+ uint32_t size;
+ } nonmappable_gmadr; /* non aperture */
+ /* allowed fence registers */
+ uint32_t fence_num;
+ uint32_t rsv2[3];
+ } avail_rs; /* available/assigned resource */
+ uint32_t rsv3[0x200 - 24]; /* pad to half page */
+ /*
+ * The bottom half page is for response from Gfx driver to hypervisor.
+ * Set to reserved fields temporarily by now.
+ */
+ uint32_t rsv4;
+ uint32_t display_ready; /* ready for display owner switch */
+ uint32_t rsv5[0x200 - 2]; /* pad to one page */
+} __packed;
+
+#define vgtif_reg(x) \
+ (VGT_PVINFO_PAGE + (long)&((struct vgt_if *)NULL)->x)
+
+extern void i915_check_vgpu(struct drm_device *dev);
+
+#endif /* _I915_VGPU_H_ */
#include "i915_drv.h"
#include "intel_drv.h"
+#include "i915_vgpu.h"
#include <linux/pm_runtime.h>
{
struct drm_i915_private *dev_priv = dev->dev_private;
+ i915_check_vgpu(dev);
+
intel_uncore_ellc_detect(dev);
intel_uncore_fw_domains_init(dev);
__intel_uncore_early_sanitize(dev, false);
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff