320 lines
8.2 KiB
C
320 lines
8.2 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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* Authors:
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* Ke Yu
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* Kevin Tian <kevin.tian@intel.com>
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* Dexuan Cui
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*
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* Contributors:
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* Tina Zhang <tina.zhang@intel.com>
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* Min He <min.he@intel.com>
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* Niu Bing <bing.niu@intel.com>
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* Zhi Wang <zhi.a.wang@intel.com>
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*
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*/
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#include "i915_drv.h"
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#include "gvt.h"
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/**
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* intel_vgpu_gpa_to_mmio_offset - translate a GPA to MMIO offset
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* @vgpu: a vGPU
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* @gpa: guest physical address
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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_gpa_to_mmio_offset(struct intel_vgpu *vgpu, u64 gpa)
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{
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u64 gttmmio_gpa = intel_vgpu_get_bar_gpa(vgpu, PCI_BASE_ADDRESS_0);
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return gpa - gttmmio_gpa;
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}
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#define reg_is_mmio(gvt, reg) \
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(reg >= 0 && reg < gvt->device_info.mmio_size)
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#define reg_is_gtt(gvt, reg) \
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(reg >= gvt->device_info.gtt_start_offset \
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&& reg < gvt->device_info.gtt_start_offset + gvt_ggtt_sz(gvt))
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static void failsafe_emulate_mmio_rw(struct intel_vgpu *vgpu, uint64_t pa,
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void *p_data, unsigned int bytes, bool read)
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{
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struct intel_gvt *gvt = NULL;
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void *pt = NULL;
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unsigned int offset = 0;
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if (!vgpu || !p_data)
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return;
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gvt = vgpu->gvt;
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mutex_lock(&vgpu->vgpu_lock);
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offset = intel_vgpu_gpa_to_mmio_offset(vgpu, pa);
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if (reg_is_mmio(gvt, offset)) {
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if (read)
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intel_vgpu_default_mmio_read(vgpu, offset, p_data,
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bytes);
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else
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intel_vgpu_default_mmio_write(vgpu, offset, p_data,
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bytes);
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} else if (reg_is_gtt(gvt, offset)) {
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offset -= gvt->device_info.gtt_start_offset;
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pt = vgpu->gtt.ggtt_mm->ggtt_mm.virtual_ggtt + offset;
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if (read)
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memcpy(p_data, pt, bytes);
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else
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memcpy(pt, p_data, bytes);
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}
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mutex_unlock(&vgpu->vgpu_lock);
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}
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/**
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* intel_vgpu_emulate_mmio_read - emulate MMIO read
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* @vgpu: a vGPU
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* @pa: guest physical address
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* @p_data: data return buffer
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* @bytes: access data length
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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_mmio_read(struct intel_vgpu *vgpu, uint64_t pa,
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void *p_data, unsigned int bytes)
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{
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struct intel_gvt *gvt = vgpu->gvt;
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unsigned int offset = 0;
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int ret = -EINVAL;
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if (vgpu->failsafe) {
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failsafe_emulate_mmio_rw(vgpu, pa, p_data, bytes, true);
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return 0;
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}
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mutex_lock(&vgpu->vgpu_lock);
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offset = intel_vgpu_gpa_to_mmio_offset(vgpu, pa);
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if (WARN_ON(bytes > 8))
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goto err;
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if (reg_is_gtt(gvt, offset)) {
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if (WARN_ON(!IS_ALIGNED(offset, 4) && !IS_ALIGNED(offset, 8)))
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goto err;
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if (WARN_ON(bytes != 4 && bytes != 8))
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goto err;
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if (WARN_ON(!reg_is_gtt(gvt, offset + bytes - 1)))
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goto err;
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ret = intel_vgpu_emulate_ggtt_mmio_read(vgpu, offset,
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p_data, bytes);
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if (ret)
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goto err;
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goto out;
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}
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if (WARN_ON_ONCE(!reg_is_mmio(gvt, offset))) {
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ret = intel_gvt_hypervisor_read_gpa(vgpu, pa, p_data, bytes);
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goto out;
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}
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if (WARN_ON(!reg_is_mmio(gvt, offset + bytes - 1)))
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goto err;
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if (!intel_gvt_mmio_is_unalign(gvt, offset)) {
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if (WARN_ON(!IS_ALIGNED(offset, bytes)))
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goto err;
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}
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ret = intel_vgpu_mmio_reg_rw(vgpu, offset, p_data, bytes, true);
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if (ret < 0)
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goto err;
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intel_gvt_mmio_set_accessed(gvt, offset);
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ret = 0;
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goto out;
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err:
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gvt_vgpu_err("fail to emulate MMIO read %08x len %d\n",
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offset, bytes);
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out:
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mutex_unlock(&vgpu->vgpu_lock);
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return ret;
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}
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/**
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* intel_vgpu_emulate_mmio_write - emulate MMIO write
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* @vgpu: a vGPU
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* @pa: guest physical address
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* @p_data: write data buffer
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* @bytes: access data length
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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_mmio_write(struct intel_vgpu *vgpu, uint64_t pa,
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void *p_data, unsigned int bytes)
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{
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struct intel_gvt *gvt = vgpu->gvt;
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unsigned int offset = 0;
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int ret = -EINVAL;
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if (vgpu->failsafe) {
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failsafe_emulate_mmio_rw(vgpu, pa, p_data, bytes, false);
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return 0;
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}
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mutex_lock(&vgpu->vgpu_lock);
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offset = intel_vgpu_gpa_to_mmio_offset(vgpu, pa);
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if (WARN_ON(bytes > 8))
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goto err;
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if (reg_is_gtt(gvt, offset)) {
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if (WARN_ON(!IS_ALIGNED(offset, 4) && !IS_ALIGNED(offset, 8)))
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goto err;
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if (WARN_ON(bytes != 4 && bytes != 8))
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goto err;
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if (WARN_ON(!reg_is_gtt(gvt, offset + bytes - 1)))
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goto err;
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ret = intel_vgpu_emulate_ggtt_mmio_write(vgpu, offset,
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p_data, bytes);
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if (ret)
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goto err;
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goto out;
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}
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if (WARN_ON_ONCE(!reg_is_mmio(gvt, offset))) {
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ret = intel_gvt_hypervisor_write_gpa(vgpu, pa, p_data, bytes);
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goto out;
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}
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ret = intel_vgpu_mmio_reg_rw(vgpu, offset, p_data, bytes, false);
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if (ret < 0)
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goto err;
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intel_gvt_mmio_set_accessed(gvt, offset);
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ret = 0;
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goto out;
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err:
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gvt_vgpu_err("fail to emulate MMIO write %08x len %d\n", offset,
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bytes);
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out:
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mutex_unlock(&vgpu->vgpu_lock);
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return ret;
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}
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/**
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* intel_vgpu_reset_mmio - reset virtual MMIO space
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* @vgpu: a vGPU
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* @dmlr: whether this is device model level reset
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*/
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void intel_vgpu_reset_mmio(struct intel_vgpu *vgpu, bool dmlr)
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{
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struct intel_gvt *gvt = vgpu->gvt;
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const struct intel_gvt_device_info *info = &gvt->device_info;
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void *mmio = gvt->firmware.mmio;
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if (dmlr) {
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memcpy(vgpu->mmio.vreg, mmio, info->mmio_size);
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memcpy(vgpu->mmio.sreg, mmio, info->mmio_size);
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vgpu_vreg_t(vgpu, GEN6_GT_THREAD_STATUS_REG) = 0;
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/* set the bit 0:2(Core C-State ) to C0 */
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vgpu_vreg_t(vgpu, GEN6_GT_CORE_STATUS) = 0;
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if (IS_BROXTON(vgpu->gvt->dev_priv)) {
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vgpu_vreg_t(vgpu, BXT_P_CR_GT_DISP_PWRON) &=
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~(BIT(0) | BIT(1));
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vgpu_vreg_t(vgpu, BXT_PORT_CL1CM_DW0(DPIO_PHY0)) &=
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~PHY_POWER_GOOD;
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vgpu_vreg_t(vgpu, BXT_PORT_CL1CM_DW0(DPIO_PHY1)) &=
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~PHY_POWER_GOOD;
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vgpu_vreg_t(vgpu, BXT_PHY_CTL_FAMILY(DPIO_PHY0)) &=
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~BIT(30);
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vgpu_vreg_t(vgpu, BXT_PHY_CTL_FAMILY(DPIO_PHY1)) &=
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~BIT(30);
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vgpu_vreg_t(vgpu, BXT_PHY_CTL(PORT_A)) &=
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~BXT_PHY_LANE_ENABLED;
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vgpu_vreg_t(vgpu, BXT_PHY_CTL(PORT_A)) |=
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BXT_PHY_CMNLANE_POWERDOWN_ACK |
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BXT_PHY_LANE_POWERDOWN_ACK;
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vgpu_vreg_t(vgpu, BXT_PHY_CTL(PORT_B)) &=
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~BXT_PHY_LANE_ENABLED;
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vgpu_vreg_t(vgpu, BXT_PHY_CTL(PORT_B)) |=
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BXT_PHY_CMNLANE_POWERDOWN_ACK |
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BXT_PHY_LANE_POWERDOWN_ACK;
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vgpu_vreg_t(vgpu, BXT_PHY_CTL(PORT_C)) &=
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~BXT_PHY_LANE_ENABLED;
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vgpu_vreg_t(vgpu, BXT_PHY_CTL(PORT_C)) |=
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BXT_PHY_CMNLANE_POWERDOWN_ACK |
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BXT_PHY_LANE_POWERDOWN_ACK;
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}
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} else {
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#define GVT_GEN8_MMIO_RESET_OFFSET (0x44200)
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/* only reset the engine related, so starting with 0x44200
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* interrupt include DE,display mmio related will not be
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* touched
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*/
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memcpy(vgpu->mmio.vreg, mmio, GVT_GEN8_MMIO_RESET_OFFSET);
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memcpy(vgpu->mmio.sreg, mmio, GVT_GEN8_MMIO_RESET_OFFSET);
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}
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}
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/**
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* intel_vgpu_init_mmio - init MMIO space
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* @vgpu: a vGPU
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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_mmio(struct intel_vgpu *vgpu)
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{
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const struct intel_gvt_device_info *info = &vgpu->gvt->device_info;
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vgpu->mmio.vreg = vzalloc(array_size(info->mmio_size, 2));
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if (!vgpu->mmio.vreg)
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return -ENOMEM;
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vgpu->mmio.sreg = vgpu->mmio.vreg + info->mmio_size;
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intel_vgpu_reset_mmio(vgpu, true);
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return 0;
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}
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/**
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* intel_vgpu_clean_mmio - clean MMIO space
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* @vgpu: a vGPU
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*
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*/
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void intel_vgpu_clean_mmio(struct intel_vgpu *vgpu)
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{
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vfree(vgpu->mmio.vreg);
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vgpu->mmio.vreg = vgpu->mmio.sreg = NULL;
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}
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