2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 * Kevin Tian <kevin.tian@intel.com>
29 * Tina Zhang <tina.zhang@intel.com>
30 * Min He <min.he@intel.com>
31 * Niu Bing <bing.niu@intel.com>
32 * Zhi Wang <zhi.a.wang@intel.com>
40 * intel_vgpu_gpa_to_mmio_offset - translate a GPA to MMIO offset
42 * @gpa: guest physical address
45 * Zero on success, negative error code if failed
47 int intel_vgpu_gpa_to_mmio_offset(struct intel_vgpu *vgpu, u64 gpa)
49 u64 gttmmio_gpa = intel_vgpu_get_bar_gpa(vgpu, PCI_BASE_ADDRESS_0);
50 return gpa - gttmmio_gpa;
53 #define reg_is_mmio(gvt, reg) \
54 (reg >= 0 && reg < gvt->device_info.mmio_size)
56 #define reg_is_gtt(gvt, reg) \
57 (reg >= gvt->device_info.gtt_start_offset \
58 && reg < gvt->device_info.gtt_start_offset + gvt_ggtt_sz(gvt))
60 static void failsafe_emulate_mmio_rw(struct intel_vgpu *vgpu, uint64_t pa,
61 void *p_data, unsigned int bytes, bool read)
63 struct intel_gvt *gvt = NULL;
65 unsigned int offset = 0;
71 mutex_lock(&vgpu->vgpu_lock);
72 offset = intel_vgpu_gpa_to_mmio_offset(vgpu, pa);
73 if (reg_is_mmio(gvt, offset)) {
75 intel_vgpu_default_mmio_read(vgpu, offset, p_data,
78 intel_vgpu_default_mmio_write(vgpu, offset, p_data,
80 } else if (reg_is_gtt(gvt, offset)) {
81 offset -= gvt->device_info.gtt_start_offset;
82 pt = vgpu->gtt.ggtt_mm->ggtt_mm.virtual_ggtt + offset;
84 memcpy(p_data, pt, bytes);
86 memcpy(pt, p_data, bytes);
89 mutex_unlock(&vgpu->vgpu_lock);
93 * intel_vgpu_emulate_mmio_read - emulate MMIO read
95 * @pa: guest physical address
96 * @p_data: data return buffer
97 * @bytes: access data length
100 * Zero on success, negative error code if failed
102 int intel_vgpu_emulate_mmio_read(struct intel_vgpu *vgpu, uint64_t pa,
103 void *p_data, unsigned int bytes)
105 struct intel_gvt *gvt = vgpu->gvt;
106 unsigned int offset = 0;
109 if (vgpu->failsafe) {
110 failsafe_emulate_mmio_rw(vgpu, pa, p_data, bytes, true);
113 mutex_lock(&vgpu->vgpu_lock);
115 offset = intel_vgpu_gpa_to_mmio_offset(vgpu, pa);
117 if (WARN_ON(bytes > 8))
120 if (reg_is_gtt(gvt, offset)) {
121 if (WARN_ON(!IS_ALIGNED(offset, 4) && !IS_ALIGNED(offset, 8)))
123 if (WARN_ON(bytes != 4 && bytes != 8))
125 if (WARN_ON(!reg_is_gtt(gvt, offset + bytes - 1)))
128 ret = intel_vgpu_emulate_ggtt_mmio_read(vgpu, offset,
135 if (WARN_ON_ONCE(!reg_is_mmio(gvt, offset))) {
136 ret = intel_gvt_hypervisor_read_gpa(vgpu, pa, p_data, bytes);
140 if (WARN_ON(!reg_is_mmio(gvt, offset + bytes - 1)))
143 if (!intel_gvt_mmio_is_unalign(gvt, offset)) {
144 if (WARN_ON(!IS_ALIGNED(offset, bytes)))
148 ret = intel_vgpu_mmio_reg_rw(vgpu, offset, p_data, bytes, true);
152 intel_gvt_mmio_set_accessed(gvt, offset);
157 gvt_vgpu_err("fail to emulate MMIO read %08x len %d\n",
160 mutex_unlock(&vgpu->vgpu_lock);
165 * intel_vgpu_emulate_mmio_write - emulate MMIO write
167 * @pa: guest physical address
168 * @p_data: write data buffer
169 * @bytes: access data length
172 * Zero on success, negative error code if failed
174 int intel_vgpu_emulate_mmio_write(struct intel_vgpu *vgpu, uint64_t pa,
175 void *p_data, unsigned int bytes)
177 struct intel_gvt *gvt = vgpu->gvt;
178 unsigned int offset = 0;
181 if (vgpu->failsafe) {
182 failsafe_emulate_mmio_rw(vgpu, pa, p_data, bytes, false);
186 mutex_lock(&vgpu->vgpu_lock);
188 offset = intel_vgpu_gpa_to_mmio_offset(vgpu, pa);
190 if (WARN_ON(bytes > 8))
193 if (reg_is_gtt(gvt, offset)) {
194 if (WARN_ON(!IS_ALIGNED(offset, 4) && !IS_ALIGNED(offset, 8)))
196 if (WARN_ON(bytes != 4 && bytes != 8))
198 if (WARN_ON(!reg_is_gtt(gvt, offset + bytes - 1)))
201 ret = intel_vgpu_emulate_ggtt_mmio_write(vgpu, offset,
208 if (WARN_ON_ONCE(!reg_is_mmio(gvt, offset))) {
209 ret = intel_gvt_hypervisor_write_gpa(vgpu, pa, p_data, bytes);
213 ret = intel_vgpu_mmio_reg_rw(vgpu, offset, p_data, bytes, false);
217 intel_gvt_mmio_set_accessed(gvt, offset);
221 gvt_vgpu_err("fail to emulate MMIO write %08x len %d\n", offset,
224 mutex_unlock(&vgpu->vgpu_lock);
230 * intel_vgpu_reset_mmio - reset virtual MMIO space
232 * @dmlr: whether this is device model level reset
234 void intel_vgpu_reset_mmio(struct intel_vgpu *vgpu, bool dmlr)
236 struct intel_gvt *gvt = vgpu->gvt;
237 const struct intel_gvt_device_info *info = &gvt->device_info;
238 void *mmio = gvt->firmware.mmio;
241 memcpy(vgpu->mmio.vreg, mmio, info->mmio_size);
242 memcpy(vgpu->mmio.sreg, mmio, info->mmio_size);
244 vgpu_vreg_t(vgpu, GEN6_GT_THREAD_STATUS_REG) = 0;
246 /* set the bit 0:2(Core C-State ) to C0 */
247 vgpu_vreg_t(vgpu, GEN6_GT_CORE_STATUS) = 0;
249 #define GVT_GEN8_MMIO_RESET_OFFSET (0x44200)
250 /* only reset the engine related, so starting with 0x44200
251 * interrupt include DE,display mmio related will not be
254 memcpy(vgpu->mmio.vreg, mmio, GVT_GEN8_MMIO_RESET_OFFSET);
255 memcpy(vgpu->mmio.sreg, mmio, GVT_GEN8_MMIO_RESET_OFFSET);
261 * intel_vgpu_init_mmio - init MMIO space
265 * Zero on success, negative error code if failed
267 int intel_vgpu_init_mmio(struct intel_vgpu *vgpu)
269 const struct intel_gvt_device_info *info = &vgpu->gvt->device_info;
271 vgpu->mmio.vreg = vzalloc(array_size(info->mmio_size, 2));
272 if (!vgpu->mmio.vreg)
275 vgpu->mmio.sreg = vgpu->mmio.vreg + info->mmio_size;
277 intel_vgpu_reset_mmio(vgpu, true);
283 * intel_vgpu_clean_mmio - clean MMIO space
287 void intel_vgpu_clean_mmio(struct intel_vgpu *vgpu)
289 vfree(vgpu->mmio.vreg);
290 vgpu->mmio.vreg = vgpu->mmio.sreg = NULL;