mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 18:52:54 +07:00
8f89743bdd
Current GVT contains some obsolete logic originally cooked to support the old, non-vfio kvmgt, which is actually workarounds. We don't support that anymore, so it's safe to remove it and make a better framework. Signed-off-by: Jike Song <jike.song@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
321 lines
7.3 KiB
C
321 lines
7.3 KiB
C
/*
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* Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/acpi.h>
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#include "i915_drv.h"
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#include "gvt.h"
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static int init_vgpu_opregion(struct intel_vgpu *vgpu, u32 gpa)
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{
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void __iomem *host_va = vgpu->gvt->opregion.opregion_va;
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u8 *buf;
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int i;
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if (WARN((vgpu_opregion(vgpu)->va),
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"vgpu%d: opregion has been initialized already.\n",
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vgpu->id))
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return -EINVAL;
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vgpu_opregion(vgpu)->va = (void *)__get_free_pages(GFP_ATOMIC |
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GFP_DMA32 | __GFP_ZERO,
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INTEL_GVT_OPREGION_PORDER);
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if (!vgpu_opregion(vgpu)->va)
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return -ENOMEM;
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memcpy_fromio(vgpu_opregion(vgpu)->va, host_va,
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INTEL_GVT_OPREGION_SIZE);
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for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++)
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vgpu_opregion(vgpu)->gfn[i] = (gpa >> PAGE_SHIFT) + i;
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/* for unknown reason, the value in LID field is incorrect
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* which block the windows guest, so workaround it by force
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* setting it to "OPEN"
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*/
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buf = (u8 *)vgpu_opregion(vgpu)->va;
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buf[INTEL_GVT_OPREGION_CLID] = 0x3;
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return 0;
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}
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static int map_vgpu_opregion(struct intel_vgpu *vgpu, bool map)
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{
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u64 mfn;
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int i, ret;
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for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++) {
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mfn = intel_gvt_hypervisor_virt_to_mfn(vgpu_opregion(vgpu)
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+ i * PAGE_SIZE);
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if (mfn == INTEL_GVT_INVALID_ADDR) {
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gvt_err("fail to get MFN from VA\n");
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return -EINVAL;
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}
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ret = intel_gvt_hypervisor_map_gfn_to_mfn(vgpu,
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vgpu_opregion(vgpu)->gfn[i],
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mfn, 1, map);
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if (ret) {
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gvt_err("fail to map GFN to MFN, errno: %d\n", ret);
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return ret;
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}
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}
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return 0;
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}
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/**
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* intel_vgpu_clean_opregion - clean the stuff used to emulate opregion
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* @vgpu: a vGPU
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*
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*/
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void intel_vgpu_clean_opregion(struct intel_vgpu *vgpu)
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{
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gvt_dbg_core("vgpu%d: clean vgpu opregion\n", vgpu->id);
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if (!vgpu_opregion(vgpu)->va)
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return;
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if (intel_gvt_host.hypervisor_type == INTEL_GVT_HYPERVISOR_XEN) {
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map_vgpu_opregion(vgpu, false);
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free_pages((unsigned long)vgpu_opregion(vgpu)->va,
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INTEL_GVT_OPREGION_PORDER);
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vgpu_opregion(vgpu)->va = NULL;
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}
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}
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/**
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* intel_vgpu_init_opregion - initialize the stuff used to emulate opregion
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* @vgpu: a vGPU
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* @gpa: guest physical address of opregion
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*
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* Returns:
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* Zero on success, negative error code if failed.
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*/
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int intel_vgpu_init_opregion(struct intel_vgpu *vgpu, u32 gpa)
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{
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int ret;
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gvt_dbg_core("vgpu%d: init vgpu opregion\n", vgpu->id);
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if (intel_gvt_host.hypervisor_type == INTEL_GVT_HYPERVISOR_XEN) {
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gvt_dbg_core("emulate opregion from kernel\n");
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ret = init_vgpu_opregion(vgpu, gpa);
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if (ret)
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return ret;
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ret = map_vgpu_opregion(vgpu, true);
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if (ret)
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return ret;
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}
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return 0;
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}
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/**
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* intel_gvt_clean_opregion - clean host opergion related stuffs
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* @gvt: a GVT device
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*
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*/
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void intel_gvt_clean_opregion(struct intel_gvt *gvt)
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{
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memunmap(gvt->opregion.opregion_va);
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gvt->opregion.opregion_va = NULL;
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}
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/**
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* intel_gvt_init_opregion - initialize host opergion related stuffs
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* @gvt: a GVT device
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*
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* Returns:
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* Zero on success, negative error code if failed.
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*/
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int intel_gvt_init_opregion(struct intel_gvt *gvt)
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{
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gvt_dbg_core("init host opregion\n");
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pci_read_config_dword(gvt->dev_priv->drm.pdev, INTEL_GVT_PCI_OPREGION,
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&gvt->opregion.opregion_pa);
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gvt->opregion.opregion_va = memremap(gvt->opregion.opregion_pa,
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INTEL_GVT_OPREGION_SIZE, MEMREMAP_WB);
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if (!gvt->opregion.opregion_va) {
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gvt_err("fail to map host opregion\n");
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return -EFAULT;
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}
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return 0;
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}
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#define GVT_OPREGION_FUNC(scic) \
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({ \
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u32 __ret; \
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__ret = (scic & OPREGION_SCIC_FUNC_MASK) >> \
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OPREGION_SCIC_FUNC_SHIFT; \
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__ret; \
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})
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#define GVT_OPREGION_SUBFUNC(scic) \
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({ \
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u32 __ret; \
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__ret = (scic & OPREGION_SCIC_SUBFUNC_MASK) >> \
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OPREGION_SCIC_SUBFUNC_SHIFT; \
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__ret; \
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})
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static const char *opregion_func_name(u32 func)
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{
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const char *name = NULL;
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switch (func) {
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case 0 ... 3:
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case 5:
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case 7 ... 15:
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name = "Reserved";
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break;
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case 4:
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name = "Get BIOS Data";
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break;
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case 6:
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name = "System BIOS Callbacks";
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break;
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default:
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name = "Unknown";
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break;
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}
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return name;
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}
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static const char *opregion_subfunc_name(u32 subfunc)
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{
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const char *name = NULL;
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switch (subfunc) {
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case 0:
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name = "Supported Calls";
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break;
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case 1:
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name = "Requested Callbacks";
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break;
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case 2 ... 3:
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case 8 ... 9:
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name = "Reserved";
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break;
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case 5:
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name = "Boot Display";
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break;
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case 6:
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name = "TV-Standard/Video-Connector";
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break;
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case 7:
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name = "Internal Graphics";
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break;
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case 10:
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name = "Spread Spectrum Clocks";
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break;
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case 11:
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name = "Get AKSV";
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break;
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default:
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name = "Unknown";
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break;
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}
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return name;
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};
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static bool querying_capabilities(u32 scic)
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{
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u32 func, subfunc;
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func = GVT_OPREGION_FUNC(scic);
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subfunc = GVT_OPREGION_SUBFUNC(scic);
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if ((func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSDATA &&
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subfunc == INTEL_GVT_OPREGION_SCIC_SF_SUPPRTEDCALLS)
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|| (func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSDATA &&
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subfunc == INTEL_GVT_OPREGION_SCIC_SF_REQEUSTEDCALLBACKS)
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|| (func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSCALLBACKS &&
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subfunc == INTEL_GVT_OPREGION_SCIC_SF_SUPPRTEDCALLS)) {
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return true;
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}
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return false;
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}
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/**
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* intel_vgpu_emulate_opregion_request - emulating OpRegion request
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* @vgpu: a vGPU
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* @swsci: SWSCI request
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*
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* Returns:
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* Zero on success, negative error code if failed
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*/
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int intel_vgpu_emulate_opregion_request(struct intel_vgpu *vgpu, u32 swsci)
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{
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u32 *scic, *parm;
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u32 func, subfunc;
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scic = vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_SCIC;
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parm = vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_PARM;
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if (!(swsci & SWSCI_SCI_SELECT)) {
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gvt_err("vgpu%d: requesting SMI service\n", vgpu->id);
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return 0;
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}
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/* ignore non 0->1 trasitions */
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if ((vgpu_cfg_space(vgpu)[INTEL_GVT_PCI_SWSCI]
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& SWSCI_SCI_TRIGGER) ||
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!(swsci & SWSCI_SCI_TRIGGER)) {
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return 0;
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}
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func = GVT_OPREGION_FUNC(*scic);
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subfunc = GVT_OPREGION_SUBFUNC(*scic);
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if (!querying_capabilities(*scic)) {
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gvt_err("vgpu%d: requesting runtime service: func \"%s\","
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" subfunc \"%s\"\n",
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vgpu->id,
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opregion_func_name(func),
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opregion_subfunc_name(subfunc));
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/*
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* emulate exit status of function call, '0' means
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* "failure, generic, unsupported or unknown cause"
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*/
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*scic &= ~OPREGION_SCIC_EXIT_MASK;
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return 0;
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}
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*scic = 0;
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*parm = 0;
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return 0;
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}
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