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
24 #include <linux/acpi.h>
28 static int init_vgpu_opregion(struct intel_vgpu *vgpu, u32 gpa)
30 void __iomem *host_va = vgpu->gvt->opregion.opregion_va;
34 if (WARN((vgpu_opregion(vgpu)->va),
35 "vgpu%d: opregion has been initialized already.\n",
39 vgpu_opregion(vgpu)->va = (void *)__get_free_pages(GFP_KERNEL |
41 get_order(INTEL_GVT_OPREGION_SIZE));
43 if (!vgpu_opregion(vgpu)->va)
46 memcpy_fromio(vgpu_opregion(vgpu)->va, host_va,
47 INTEL_GVT_OPREGION_SIZE);
49 for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++)
50 vgpu_opregion(vgpu)->gfn[i] = (gpa >> PAGE_SHIFT) + i;
52 /* for unknown reason, the value in LID field is incorrect
53 * which block the windows guest, so workaround it by force
54 * setting it to "OPEN"
56 buf = (u8 *)vgpu_opregion(vgpu)->va;
57 buf[INTEL_GVT_OPREGION_CLID] = 0x3;
62 static int map_vgpu_opregion(struct intel_vgpu *vgpu, bool map)
67 for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++) {
68 mfn = intel_gvt_hypervisor_virt_to_mfn(vgpu_opregion(vgpu)->va
70 if (mfn == INTEL_GVT_INVALID_ADDR) {
71 gvt_err("fail to get MFN from VA\n");
74 ret = intel_gvt_hypervisor_map_gfn_to_mfn(vgpu,
75 vgpu_opregion(vgpu)->gfn[i],
78 gvt_err("fail to map GFN to MFN, errno: %d\n", ret);
86 * intel_vgpu_clean_opregion - clean the stuff used to emulate opregion
90 void intel_vgpu_clean_opregion(struct intel_vgpu *vgpu)
92 gvt_dbg_core("vgpu%d: clean vgpu opregion\n", vgpu->id);
94 if (!vgpu_opregion(vgpu)->va)
97 if (intel_gvt_host.hypervisor_type == INTEL_GVT_HYPERVISOR_XEN) {
98 map_vgpu_opregion(vgpu, false);
99 free_pages((unsigned long)vgpu_opregion(vgpu)->va,
100 get_order(INTEL_GVT_OPREGION_SIZE));
102 vgpu_opregion(vgpu)->va = NULL;
107 * intel_vgpu_init_opregion - initialize the stuff used to emulate opregion
109 * @gpa: guest physical address of opregion
112 * Zero on success, negative error code if failed.
114 int intel_vgpu_init_opregion(struct intel_vgpu *vgpu, u32 gpa)
118 gvt_dbg_core("vgpu%d: init vgpu opregion\n", vgpu->id);
120 if (intel_gvt_host.hypervisor_type == INTEL_GVT_HYPERVISOR_XEN) {
121 gvt_dbg_core("emulate opregion from kernel\n");
123 ret = init_vgpu_opregion(vgpu, gpa);
127 ret = map_vgpu_opregion(vgpu, true);
136 * intel_gvt_clean_opregion - clean host opergion related stuffs
140 void intel_gvt_clean_opregion(struct intel_gvt *gvt)
142 memunmap(gvt->opregion.opregion_va);
143 gvt->opregion.opregion_va = NULL;
147 * intel_gvt_init_opregion - initialize host opergion related stuffs
151 * Zero on success, negative error code if failed.
153 int intel_gvt_init_opregion(struct intel_gvt *gvt)
155 gvt_dbg_core("init host opregion\n");
157 pci_read_config_dword(gvt->dev_priv->drm.pdev, INTEL_GVT_PCI_OPREGION,
158 &gvt->opregion.opregion_pa);
160 gvt->opregion.opregion_va = memremap(gvt->opregion.opregion_pa,
161 INTEL_GVT_OPREGION_SIZE, MEMREMAP_WB);
162 if (!gvt->opregion.opregion_va) {
163 gvt_err("fail to map host opregion\n");
169 #define GVT_OPREGION_FUNC(scic) \
172 __ret = (scic & OPREGION_SCIC_FUNC_MASK) >> \
173 OPREGION_SCIC_FUNC_SHIFT; \
177 #define GVT_OPREGION_SUBFUNC(scic) \
180 __ret = (scic & OPREGION_SCIC_SUBFUNC_MASK) >> \
181 OPREGION_SCIC_SUBFUNC_SHIFT; \
185 static const char *opregion_func_name(u32 func)
187 const char *name = NULL;
197 name = "Get BIOS Data";
201 name = "System BIOS Callbacks";
211 static const char *opregion_subfunc_name(u32 subfunc)
213 const char *name = NULL;
217 name = "Supported Calls";
221 name = "Requested Callbacks";
230 name = "Boot Display";
234 name = "TV-Standard/Video-Connector";
238 name = "Internal Graphics";
242 name = "Spread Spectrum Clocks";
256 static bool querying_capabilities(u32 scic)
260 func = GVT_OPREGION_FUNC(scic);
261 subfunc = GVT_OPREGION_SUBFUNC(scic);
263 if ((func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSDATA &&
264 subfunc == INTEL_GVT_OPREGION_SCIC_SF_SUPPRTEDCALLS)
265 || (func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSDATA &&
266 subfunc == INTEL_GVT_OPREGION_SCIC_SF_REQEUSTEDCALLBACKS)
267 || (func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSCALLBACKS &&
268 subfunc == INTEL_GVT_OPREGION_SCIC_SF_SUPPRTEDCALLS)) {
275 * intel_vgpu_emulate_opregion_request - emulating OpRegion request
277 * @swsci: SWSCI request
280 * Zero on success, negative error code if failed
282 int intel_vgpu_emulate_opregion_request(struct intel_vgpu *vgpu, u32 swsci)
287 scic = vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_SCIC;
288 parm = vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_PARM;
290 if (!(swsci & SWSCI_SCI_SELECT)) {
291 gvt_err("vgpu%d: requesting SMI service\n", vgpu->id);
294 /* ignore non 0->1 trasitions */
295 if ((vgpu_cfg_space(vgpu)[INTEL_GVT_PCI_SWSCI]
296 & SWSCI_SCI_TRIGGER) ||
297 !(swsci & SWSCI_SCI_TRIGGER)) {
301 func = GVT_OPREGION_FUNC(*scic);
302 subfunc = GVT_OPREGION_SUBFUNC(*scic);
303 if (!querying_capabilities(*scic)) {
304 gvt_err("vgpu%d: requesting runtime service: func \"%s\","
307 opregion_func_name(func),
308 opregion_subfunc_name(subfunc));
310 * emulate exit status of function call, '0' means
311 * "failure, generic, unsupported or unknown cause"
313 *scic &= ~OPREGION_SCIC_EXIT_MASK;