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>
29 * Note: Only for GVT-g virtual VBT generation, other usage must
32 #define _INTEL_BIOS_PRIVATE
33 #include "intel_vbt_defs.h"
35 #define OPREGION_SIGNATURE "IntelGraphicsMem"
36 #define MBOX_VBT (1<<3)
39 #define DEVICE_TYPE_CRT 0x01
40 #define DEVICE_TYPE_EFP1 0x04
41 #define DEVICE_TYPE_EFP2 0x40
42 #define DEVICE_TYPE_EFP3 0x20
43 #define DEVICE_TYPE_EFP4 0x10
47 struct opregion_header {
61 struct bdb_data_header {
63 u16 size; /* data size */
66 struct efp_child_device_config {
71 u8 dp_onboard_redriver; /* 158 */
72 u8 dp_ondock_redriver; /* 158 */
73 u8 hdmi_level_shifter_value:4; /* 169 */
74 u8 hdmi_max_data_rate:4; /* 204 */
75 u16 dtd_buf_ptr; /* 161 */
76 u8 edidless_efp:1; /* 161 */
77 u8 compression_enable:1; /* 198 */
78 u8 compression_method:1; /* 198 */
79 u8 ganged_edp:1; /* 202 */
81 u8 compression_structure_index:4; /* 198 */
83 u8 slave_port; /* 202 */
86 u8 i2c_pin; /* for add-in card */
87 u8 slave_addr; /* for add-in card */
91 u8 efp_docked_port:1; /* 158 */
92 u8 lane_reversal:1; /* 184 */
93 u8 onboard_lspcon:1; /* 192 */
94 u8 iboost_enable:1; /* 196 */
95 u8 hpd_invert:1; /* BXT 196 */
104 u8 sdvo_stall:1; /* 158 */
106 u8 integrated_encoder:1;
109 u8 mipi_bridge_type; /* 171 */
110 u16 device_class_ext;
112 u8 dp_usb_type_c:1; /* 195 */
114 u8 dp_usb_type_c_2x_gpio_index; /* 195 */
115 u16 dp_usb_type_c_2x_gpio_pin; /* 195 */
116 u8 iboost_dp:4; /* 196 */
117 u8 iboost_hdmi:4; /* 196 */
121 /* header->bdb_offset point to bdb_header offset */
122 struct vbt_header header;
123 struct bdb_header bdb_header;
125 struct bdb_data_header general_features_header;
126 struct bdb_general_features general_features;
128 struct bdb_data_header general_definitions_header;
129 struct bdb_general_definitions general_definitions;
131 struct efp_child_device_config child0;
132 struct efp_child_device_config child1;
133 struct efp_child_device_config child2;
134 struct efp_child_device_config child3;
136 struct bdb_data_header driver_features_header;
137 struct bdb_driver_features driver_features;
140 static void virt_vbt_generation(struct vbt *v)
144 memset(v, 0, sizeof(struct vbt));
146 v->header.signature[0] = '$';
147 v->header.signature[1] = 'V';
148 v->header.signature[2] = 'B';
149 v->header.signature[3] = 'T';
151 /* there's features depending on version! */
152 v->header.version = 155;
153 v->header.header_size = sizeof(v->header);
154 v->header.vbt_size = sizeof(struct vbt) - sizeof(v->header);
155 v->header.bdb_offset = offsetof(struct vbt, bdb_header);
157 strcpy(&v->bdb_header.signature[0], "BIOS_DATA_BLOCK");
158 v->bdb_header.version = 186; /* child_dev_size = 38 */
159 v->bdb_header.header_size = sizeof(v->bdb_header);
161 v->bdb_header.bdb_size = sizeof(struct vbt) - sizeof(struct vbt_header)
162 - sizeof(struct bdb_header);
164 /* general features */
165 v->general_features_header.id = BDB_GENERAL_FEATURES;
166 v->general_features_header.size = sizeof(struct bdb_general_features);
167 v->general_features.int_crt_support = 0;
168 v->general_features.int_tv_support = 0;
171 num_child = 4; /* each port has one child */
172 v->general_definitions_header.id = BDB_GENERAL_DEFINITIONS;
173 /* size will include child devices */
174 v->general_definitions_header.size =
175 sizeof(struct bdb_general_definitions) + num_child * DEV_SIZE;
176 v->general_definitions.child_dev_size = DEV_SIZE;
179 v->child0.handle = DEVICE_TYPE_EFP1;
180 v->child0.device_type = DEVICE_TYPE_DP;
181 v->child0.dvo_port = DVO_PORT_DPA;
182 v->child0.aux_channel = DP_AUX_A;
183 v->child0.dp_compat = true;
184 v->child0.integrated_encoder = true;
187 v->child1.handle = DEVICE_TYPE_EFP2;
188 v->child1.device_type = DEVICE_TYPE_DP;
189 v->child1.dvo_port = DVO_PORT_DPB;
190 v->child1.aux_channel = DP_AUX_B;
191 v->child1.dp_compat = true;
192 v->child1.integrated_encoder = true;
195 v->child2.handle = DEVICE_TYPE_EFP3;
196 v->child2.device_type = DEVICE_TYPE_DP;
197 v->child2.dvo_port = DVO_PORT_DPC;
198 v->child2.aux_channel = DP_AUX_C;
199 v->child2.dp_compat = true;
200 v->child2.integrated_encoder = true;
203 v->child3.handle = DEVICE_TYPE_EFP4;
204 v->child3.device_type = DEVICE_TYPE_DP;
205 v->child3.dvo_port = DVO_PORT_DPD;
206 v->child3.aux_channel = DP_AUX_D;
207 v->child3.dp_compat = true;
208 v->child3.integrated_encoder = true;
210 /* driver features */
211 v->driver_features_header.id = BDB_DRIVER_FEATURES;
212 v->driver_features_header.size = sizeof(struct bdb_driver_features);
213 v->driver_features.lvds_config = BDB_DRIVER_FEATURE_NO_LVDS;
217 * intel_vgpu_init_opregion - initialize the stuff used to emulate opregion
219 * @gpa: guest physical address of opregion
222 * Zero on success, negative error code if failed.
224 int intel_vgpu_init_opregion(struct intel_vgpu *vgpu)
227 struct opregion_header *header;
229 const char opregion_signature[16] = OPREGION_SIGNATURE;
231 gvt_dbg_core("init vgpu%d opregion\n", vgpu->id);
232 vgpu_opregion(vgpu)->va = (void *)__get_free_pages(GFP_KERNEL |
234 get_order(INTEL_GVT_OPREGION_SIZE));
235 if (!vgpu_opregion(vgpu)->va) {
236 gvt_err("fail to get memory for vgpu virt opregion\n");
240 /* emulated opregion with VBT mailbox only */
241 buf = (u8 *)vgpu_opregion(vgpu)->va;
242 header = (struct opregion_header *)buf;
243 memcpy(header->signature, opregion_signature,
244 sizeof(opregion_signature));
246 header->opregion_ver = 0x02000000;
247 header->mboxes = MBOX_VBT;
249 /* for unknown reason, the value in LID field is incorrect
250 * which block the windows guest, so workaround it by force
251 * setting it to "OPEN"
253 buf[INTEL_GVT_OPREGION_CLID] = 0x3;
255 /* emulated vbt from virt vbt generation */
256 virt_vbt_generation(&v);
257 memcpy(buf + INTEL_GVT_OPREGION_VBT_OFFSET, &v, sizeof(struct vbt));
262 static int map_vgpu_opregion(struct intel_vgpu *vgpu, bool map)
267 for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++) {
268 mfn = intel_gvt_hypervisor_virt_to_mfn(vgpu_opregion(vgpu)->va
270 if (mfn == INTEL_GVT_INVALID_ADDR) {
271 gvt_vgpu_err("fail to get MFN from VA\n");
274 ret = intel_gvt_hypervisor_map_gfn_to_mfn(vgpu,
275 vgpu_opregion(vgpu)->gfn[i],
278 gvt_vgpu_err("fail to map GFN to MFN, errno: %d\n",
284 vgpu_opregion(vgpu)->mapped = map;
290 * intel_vgpu_opregion_base_write_handler - Opregion base register write handler
293 * @gpa: guest physical address of opregion
296 * Zero on success, negative error code if failed.
298 int intel_vgpu_opregion_base_write_handler(struct intel_vgpu *vgpu, u32 gpa)
303 gvt_dbg_core("emulate opregion from kernel\n");
305 switch (intel_gvt_host.hypervisor_type) {
306 case INTEL_GVT_HYPERVISOR_KVM:
307 for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++)
308 vgpu_opregion(vgpu)->gfn[i] = (gpa >> PAGE_SHIFT) + i;
310 case INTEL_GVT_HYPERVISOR_XEN:
312 * Wins guest on Xengt will write this register twice: xen
313 * hvmloader and windows graphic driver.
315 if (vgpu_opregion(vgpu)->mapped)
316 map_vgpu_opregion(vgpu, false);
318 for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++)
319 vgpu_opregion(vgpu)->gfn[i] = (gpa >> PAGE_SHIFT) + i;
321 ret = map_vgpu_opregion(vgpu, true);
325 gvt_vgpu_err("not supported hypervisor\n");
332 * intel_vgpu_clean_opregion - clean the stuff used to emulate opregion
336 void intel_vgpu_clean_opregion(struct intel_vgpu *vgpu)
338 gvt_dbg_core("vgpu%d: clean vgpu opregion\n", vgpu->id);
340 if (!vgpu_opregion(vgpu)->va)
343 if (intel_gvt_host.hypervisor_type == INTEL_GVT_HYPERVISOR_XEN) {
344 if (vgpu_opregion(vgpu)->mapped)
345 map_vgpu_opregion(vgpu, false);
346 } else if (intel_gvt_host.hypervisor_type == INTEL_GVT_HYPERVISOR_KVM) {
347 /* Guest opregion is released by VFIO */
349 free_pages((unsigned long)vgpu_opregion(vgpu)->va,
350 get_order(INTEL_GVT_OPREGION_SIZE));
352 vgpu_opregion(vgpu)->va = NULL;
357 #define GVT_OPREGION_FUNC(scic) \
360 __ret = (scic & OPREGION_SCIC_FUNC_MASK) >> \
361 OPREGION_SCIC_FUNC_SHIFT; \
365 #define GVT_OPREGION_SUBFUNC(scic) \
368 __ret = (scic & OPREGION_SCIC_SUBFUNC_MASK) >> \
369 OPREGION_SCIC_SUBFUNC_SHIFT; \
373 static const char *opregion_func_name(u32 func)
375 const char *name = NULL;
385 name = "Get BIOS Data";
389 name = "System BIOS Callbacks";
399 static const char *opregion_subfunc_name(u32 subfunc)
401 const char *name = NULL;
405 name = "Supported Calls";
409 name = "Requested Callbacks";
418 name = "Boot Display";
422 name = "TV-Standard/Video-Connector";
426 name = "Internal Graphics";
430 name = "Spread Spectrum Clocks";
444 static bool querying_capabilities(u32 scic)
448 func = GVT_OPREGION_FUNC(scic);
449 subfunc = GVT_OPREGION_SUBFUNC(scic);
451 if ((func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSDATA &&
452 subfunc == INTEL_GVT_OPREGION_SCIC_SF_SUPPRTEDCALLS)
453 || (func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSDATA &&
454 subfunc == INTEL_GVT_OPREGION_SCIC_SF_REQEUSTEDCALLBACKS)
455 || (func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSCALLBACKS &&
456 subfunc == INTEL_GVT_OPREGION_SCIC_SF_SUPPRTEDCALLS)) {
463 * intel_vgpu_emulate_opregion_request - emulating OpRegion request
465 * @swsci: SWSCI request
468 * Zero on success, negative error code if failed
470 int intel_vgpu_emulate_opregion_request(struct intel_vgpu *vgpu, u32 swsci)
474 u64 scic_pa = 0, parm_pa = 0;
477 switch (intel_gvt_host.hypervisor_type) {
478 case INTEL_GVT_HYPERVISOR_XEN:
479 scic = *((u32 *)vgpu_opregion(vgpu)->va +
480 INTEL_GVT_OPREGION_SCIC);
481 parm = *((u32 *)vgpu_opregion(vgpu)->va +
482 INTEL_GVT_OPREGION_PARM);
484 case INTEL_GVT_HYPERVISOR_KVM:
485 scic_pa = (vgpu_opregion(vgpu)->gfn[0] << PAGE_SHIFT) +
486 INTEL_GVT_OPREGION_SCIC;
487 parm_pa = (vgpu_opregion(vgpu)->gfn[0] << PAGE_SHIFT) +
488 INTEL_GVT_OPREGION_PARM;
490 ret = intel_gvt_hypervisor_read_gpa(vgpu, scic_pa,
491 &scic, sizeof(scic));
493 gvt_vgpu_err("guest opregion read error %d, gpa 0x%llx, len %lu\n",
494 ret, scic_pa, sizeof(scic));
498 ret = intel_gvt_hypervisor_read_gpa(vgpu, parm_pa,
499 &parm, sizeof(parm));
501 gvt_vgpu_err("guest opregion read error %d, gpa 0x%llx, len %lu\n",
502 ret, scic_pa, sizeof(scic));
508 gvt_vgpu_err("not supported hypervisor\n");
512 if (!(swsci & SWSCI_SCI_SELECT)) {
513 gvt_vgpu_err("requesting SMI service\n");
516 /* ignore non 0->1 trasitions */
517 if ((vgpu_cfg_space(vgpu)[INTEL_GVT_PCI_SWSCI]
518 & SWSCI_SCI_TRIGGER) ||
519 !(swsci & SWSCI_SCI_TRIGGER)) {
523 func = GVT_OPREGION_FUNC(scic);
524 subfunc = GVT_OPREGION_SUBFUNC(scic);
525 if (!querying_capabilities(scic)) {
526 gvt_vgpu_err("requesting runtime service: func \"%s\","
528 opregion_func_name(func),
529 opregion_subfunc_name(subfunc));
531 * emulate exit status of function call, '0' means
532 * "failure, generic, unsupported or unknown cause"
534 scic &= ~OPREGION_SCIC_EXIT_MASK;
542 switch (intel_gvt_host.hypervisor_type) {
543 case INTEL_GVT_HYPERVISOR_XEN:
544 *((u32 *)vgpu_opregion(vgpu)->va +
545 INTEL_GVT_OPREGION_SCIC) = scic;
546 *((u32 *)vgpu_opregion(vgpu)->va +
547 INTEL_GVT_OPREGION_PARM) = parm;
549 case INTEL_GVT_HYPERVISOR_KVM:
550 ret = intel_gvt_hypervisor_write_gpa(vgpu, scic_pa,
551 &scic, sizeof(scic));
553 gvt_vgpu_err("guest opregion write error %d, gpa 0x%llx, len %lu\n",
554 ret, scic_pa, sizeof(scic));
558 ret = intel_gvt_hypervisor_write_gpa(vgpu, parm_pa,
559 &parm, sizeof(parm));
561 gvt_vgpu_err("guest opregion write error %d, gpa 0x%llx, len %lu\n",
562 ret, scic_pa, sizeof(scic));
568 gvt_vgpu_err("not supported hypervisor\n");