/* * Copyright(c) 2011-2016 Intel Corporation. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include #include "i915_drv.h" #include "gvt.h" /* * Note: Only for GVT-g virtual VBT generation, other usage must * not do like this. */ #define _INTEL_BIOS_PRIVATE #include "display/intel_vbt_defs.h" #define OPREGION_SIGNATURE "IntelGraphicsMem" #define MBOX_VBT (1<<3) /* device handle */ #define DEVICE_TYPE_CRT 0x01 #define DEVICE_TYPE_EFP1 0x04 #define DEVICE_TYPE_EFP2 0x40 #define DEVICE_TYPE_EFP3 0x20 #define DEVICE_TYPE_EFP4 0x10 struct opregion_header { u8 signature[16]; u32 size; u32 opregion_ver; u8 bios_ver[32]; u8 vbios_ver[16]; u8 driver_ver[16]; u32 mboxes; u32 driver_model; u32 pcon; u8 dver[32]; u8 rsvd[124]; } __packed; struct bdb_data_header { u8 id; u16 size; /* data size */ } __packed; /* For supporting windows guest with opregion, here hardcode the emulated * bdb header version as '186', and the corresponding child_device_config * length should be '33' but not '38'. */ struct efp_child_device_config { u16 handle; u16 device_type; u16 device_class; u8 i2c_speed; u8 dp_onboard_redriver; /* 158 */ u8 dp_ondock_redriver; /* 158 */ u8 hdmi_level_shifter_value:4; /* 169 */ u8 hdmi_max_data_rate:4; /* 204 */ u16 dtd_buf_ptr; /* 161 */ u8 edidless_efp:1; /* 161 */ u8 compression_enable:1; /* 198 */ u8 compression_method:1; /* 198 */ u8 ganged_edp:1; /* 202 */ u8 skip0:4; u8 compression_structure_index:4; /* 198 */ u8 skip1:4; u8 slave_port; /* 202 */ u8 skip2; u8 dvo_port; u8 i2c_pin; /* for add-in card */ u8 slave_addr; /* for add-in card */ u8 ddc_pin; u16 edid_ptr; u8 dvo_config; u8 efp_docked_port:1; /* 158 */ u8 lane_reversal:1; /* 184 */ u8 onboard_lspcon:1; /* 192 */ u8 iboost_enable:1; /* 196 */ u8 hpd_invert:1; /* BXT 196 */ u8 slip3:3; u8 hdmi_compat:1; u8 dp_compat:1; u8 tmds_compat:1; u8 skip4:5; u8 aux_channel; u8 dongle_detect; u8 pipe_cap:2; u8 sdvo_stall:1; /* 158 */ u8 hpd_status:2; u8 integrated_encoder:1; u8 skip5:2; u8 dvo_wiring; u8 mipi_bridge_type; /* 171 */ u16 device_class_ext; u8 dvo_function; } __packed; struct vbt { /* header->bdb_offset point to bdb_header offset */ struct vbt_header header; struct bdb_header bdb_header; struct bdb_data_header general_features_header; struct bdb_general_features general_features; struct bdb_data_header general_definitions_header; struct bdb_general_definitions general_definitions; struct efp_child_device_config child0; struct efp_child_device_config child1; struct efp_child_device_config child2; struct efp_child_device_config child3; struct bdb_data_header driver_features_header; struct bdb_driver_features driver_features; }; static void virt_vbt_generation(struct vbt *v) { int num_child; memset(v, 0, sizeof(struct vbt)); v->header.signature[0] = '$'; v->header.signature[1] = 'V'; v->header.signature[2] = 'B'; v->header.signature[3] = 'T'; /* there's features depending on version! */ v->header.version = 155; v->header.header_size = sizeof(v->header); v->header.vbt_size = sizeof(struct vbt); v->header.bdb_offset = offsetof(struct vbt, bdb_header); strcpy(&v->bdb_header.signature[0], "BIOS_DATA_BLOCK"); v->bdb_header.version = 186; /* child_dev_size = 33 */ v->bdb_header.header_size = sizeof(v->bdb_header); v->bdb_header.bdb_size = sizeof(struct vbt) - sizeof(struct vbt_header); /* general features */ v->general_features_header.id = BDB_GENERAL_FEATURES; v->general_features_header.size = sizeof(struct bdb_general_features); v->general_features.int_crt_support = 0; v->general_features.int_tv_support = 0; /* child device */ num_child = 4; /* each port has one child */ v->general_definitions.child_dev_size = sizeof(struct efp_child_device_config); v->general_definitions_header.id = BDB_GENERAL_DEFINITIONS; /* size will include child devices */ v->general_definitions_header.size = sizeof(struct bdb_general_definitions) + num_child * v->general_definitions.child_dev_size; /* portA */ v->child0.handle = DEVICE_TYPE_EFP1; v->child0.device_type = DEVICE_TYPE_DP; v->child0.dvo_port = DVO_PORT_DPA; v->child0.aux_channel = DP_AUX_A; v->child0.dp_compat = true; v->child0.integrated_encoder = true; /* portB */ v->child1.handle = DEVICE_TYPE_EFP2; v->child1.device_type = DEVICE_TYPE_DP; v->child1.dvo_port = DVO_PORT_DPB; v->child1.aux_channel = DP_AUX_B; v->child1.dp_compat = true; v->child1.integrated_encoder = true; /* portC */ v->child2.handle = DEVICE_TYPE_EFP3; v->child2.device_type = DEVICE_TYPE_DP; v->child2.dvo_port = DVO_PORT_DPC; v->child2.aux_channel = DP_AUX_C; v->child2.dp_compat = true; v->child2.integrated_encoder = true; /* portD */ v->child3.handle = DEVICE_TYPE_EFP4; v->child3.device_type = DEVICE_TYPE_DP; v->child3.dvo_port = DVO_PORT_DPD; v->child3.aux_channel = DP_AUX_D; v->child3.dp_compat = true; v->child3.integrated_encoder = true; /* driver features */ v->driver_features_header.id = BDB_DRIVER_FEATURES; v->driver_features_header.size = sizeof(struct bdb_driver_features); v->driver_features.lvds_config = BDB_DRIVER_FEATURE_NO_LVDS; } /** * intel_vgpu_init_opregion - initialize the stuff used to emulate opregion * @vgpu: a vGPU * * Returns: * Zero on success, negative error code if failed. */ int intel_vgpu_init_opregion(struct intel_vgpu *vgpu) { u8 *buf; struct opregion_header *header; struct vbt v; const char opregion_signature[16] = OPREGION_SIGNATURE; gvt_dbg_core("init vgpu%d opregion\n", vgpu->id); vgpu_opregion(vgpu)->va = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(INTEL_GVT_OPREGION_SIZE)); if (!vgpu_opregion(vgpu)->va) { gvt_err("fail to get memory for vgpu virt opregion\n"); return -ENOMEM; } /* emulated opregion with VBT mailbox only */ buf = (u8 *)vgpu_opregion(vgpu)->va; header = (struct opregion_header *)buf; memcpy(header->signature, opregion_signature, sizeof(opregion_signature)); header->size = 0x8; header->opregion_ver = 0x02000000; header->mboxes = MBOX_VBT; /* for unknown reason, the value in LID field is incorrect * which block the windows guest, so workaround it by force * setting it to "OPEN" */ buf[INTEL_GVT_OPREGION_CLID] = 0x3; /* emulated vbt from virt vbt generation */ virt_vbt_generation(&v); memcpy(buf + INTEL_GVT_OPREGION_VBT_OFFSET, &v, sizeof(struct vbt)); return 0; } static int map_vgpu_opregion(struct intel_vgpu *vgpu, bool map) { u64 mfn; int i, ret; for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++) { mfn = intel_gvt_hypervisor_virt_to_mfn(vgpu_opregion(vgpu)->va + i * PAGE_SIZE); if (mfn == INTEL_GVT_INVALID_ADDR) { gvt_vgpu_err("fail to get MFN from VA\n"); return -EINVAL; } ret = intel_gvt_hypervisor_map_gfn_to_mfn(vgpu, vgpu_opregion(vgpu)->gfn[i], mfn, 1, map); if (ret) { gvt_vgpu_err("fail to map GFN to MFN, errno: %d\n", ret); return ret; } } vgpu_opregion(vgpu)->mapped = map; return 0; } /** * intel_vgpu_opregion_base_write_handler - Opregion base register write handler * * @vgpu: a vGPU * @gpa: guest physical address of opregion * * Returns: * Zero on success, negative error code if failed. */ int intel_vgpu_opregion_base_write_handler(struct intel_vgpu *vgpu, u32 gpa) { int i, ret = 0; gvt_dbg_core("emulate opregion from kernel\n"); switch (intel_gvt_host.hypervisor_type) { case INTEL_GVT_HYPERVISOR_KVM: for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++) vgpu_opregion(vgpu)->gfn[i] = (gpa >> PAGE_SHIFT) + i; break; case INTEL_GVT_HYPERVISOR_XEN: /** * Wins guest on Xengt will write this register twice: xen * hvmloader and windows graphic driver. */ if (vgpu_opregion(vgpu)->mapped) map_vgpu_opregion(vgpu, false); for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++) vgpu_opregion(vgpu)->gfn[i] = (gpa >> PAGE_SHIFT) + i; ret = map_vgpu_opregion(vgpu, true); break; default: ret = -EINVAL; gvt_vgpu_err("not supported hypervisor\n"); } return ret; } /** * intel_vgpu_clean_opregion - clean the stuff used to emulate opregion * @vgpu: a vGPU * */ void intel_vgpu_clean_opregion(struct intel_vgpu *vgpu) { gvt_dbg_core("vgpu%d: clean vgpu opregion\n", vgpu->id); if (!vgpu_opregion(vgpu)->va) return; if (intel_gvt_host.hypervisor_type == INTEL_GVT_HYPERVISOR_XEN) { if (vgpu_opregion(vgpu)->mapped) map_vgpu_opregion(vgpu, false); } else if (intel_gvt_host.hypervisor_type == INTEL_GVT_HYPERVISOR_KVM) { /* Guest opregion is released by VFIO */ } free_pages((unsigned long)vgpu_opregion(vgpu)->va, get_order(INTEL_GVT_OPREGION_SIZE)); vgpu_opregion(vgpu)->va = NULL; } #define GVT_OPREGION_FUNC(scic) \ ({ \ u32 __ret; \ __ret = (scic & OPREGION_SCIC_FUNC_MASK) >> \ OPREGION_SCIC_FUNC_SHIFT; \ __ret; \ }) #define GVT_OPREGION_SUBFUNC(scic) \ ({ \ u32 __ret; \ __ret = (scic & OPREGION_SCIC_SUBFUNC_MASK) >> \ OPREGION_SCIC_SUBFUNC_SHIFT; \ __ret; \ }) static const char *opregion_func_name(u32 func) { const char *name = NULL; switch (func) { case 0 ... 3: case 5: case 7 ... 15: name = "Reserved"; break; case 4: name = "Get BIOS Data"; break; case 6: name = "System BIOS Callbacks"; break; default: name = "Unknown"; break; } return name; } static const char *opregion_subfunc_name(u32 subfunc) { const char *name = NULL; switch (subfunc) { case 0: name = "Supported Calls"; break; case 1: name = "Requested Callbacks"; break; case 2 ... 3: case 8 ... 9: name = "Reserved"; break; case 5: name = "Boot Display"; break; case 6: name = "TV-Standard/Video-Connector"; break; case 7: name = "Internal Graphics"; break; case 10: name = "Spread Spectrum Clocks"; break; case 11: name = "Get AKSV"; break; default: name = "Unknown"; break; } return name; }; static bool querying_capabilities(u32 scic) { u32 func, subfunc; func = GVT_OPREGION_FUNC(scic); subfunc = GVT_OPREGION_SUBFUNC(scic); if ((func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSDATA && subfunc == INTEL_GVT_OPREGION_SCIC_SF_SUPPRTEDCALLS) || (func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSDATA && subfunc == INTEL_GVT_OPREGION_SCIC_SF_REQEUSTEDCALLBACKS) || (func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSCALLBACKS && subfunc == INTEL_GVT_OPREGION_SCIC_SF_SUPPRTEDCALLS)) { return true; } return false; } /** * intel_vgpu_emulate_opregion_request - emulating OpRegion request * @vgpu: a vGPU * @swsci: SWSCI request * * Returns: * Zero on success, negative error code if failed */ int intel_vgpu_emulate_opregion_request(struct intel_vgpu *vgpu, u32 swsci) { u32 scic, parm; u32 func, subfunc; u64 scic_pa = 0, parm_pa = 0; int ret; switch (intel_gvt_host.hypervisor_type) { case INTEL_GVT_HYPERVISOR_XEN: scic = *((u32 *)vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_SCIC); parm = *((u32 *)vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_PARM); break; case INTEL_GVT_HYPERVISOR_KVM: scic_pa = (vgpu_opregion(vgpu)->gfn[0] << PAGE_SHIFT) + INTEL_GVT_OPREGION_SCIC; parm_pa = (vgpu_opregion(vgpu)->gfn[0] << PAGE_SHIFT) + INTEL_GVT_OPREGION_PARM; ret = intel_gvt_hypervisor_read_gpa(vgpu, scic_pa, &scic, sizeof(scic)); if (ret) { gvt_vgpu_err("guest opregion read error %d, gpa 0x%llx, len %lu\n", ret, scic_pa, sizeof(scic)); return ret; } ret = intel_gvt_hypervisor_read_gpa(vgpu, parm_pa, &parm, sizeof(parm)); if (ret) { gvt_vgpu_err("guest opregion read error %d, gpa 0x%llx, len %lu\n", ret, scic_pa, sizeof(scic)); return ret; } break; default: gvt_vgpu_err("not supported hypervisor\n"); return -EINVAL; } if (!(swsci & SWSCI_SCI_SELECT)) { gvt_vgpu_err("requesting SMI service\n"); return 0; } /* ignore non 0->1 trasitions */ if ((vgpu_cfg_space(vgpu)[INTEL_GVT_PCI_SWSCI] & SWSCI_SCI_TRIGGER) || !(swsci & SWSCI_SCI_TRIGGER)) { return 0; } func = GVT_OPREGION_FUNC(scic); subfunc = GVT_OPREGION_SUBFUNC(scic); if (!querying_capabilities(scic)) { gvt_vgpu_err("requesting runtime service: func \"%s\"," " subfunc \"%s\"\n", opregion_func_name(func), opregion_subfunc_name(subfunc)); /* * emulate exit status of function call, '0' means * "failure, generic, unsupported or unknown cause" */ scic &= ~OPREGION_SCIC_EXIT_MASK; goto out; } scic = 0; parm = 0; out: switch (intel_gvt_host.hypervisor_type) { case INTEL_GVT_HYPERVISOR_XEN: *((u32 *)vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_SCIC) = scic; *((u32 *)vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_PARM) = parm; break; case INTEL_GVT_HYPERVISOR_KVM: ret = intel_gvt_hypervisor_write_gpa(vgpu, scic_pa, &scic, sizeof(scic)); if (ret) { gvt_vgpu_err("guest opregion write error %d, gpa 0x%llx, len %lu\n", ret, scic_pa, sizeof(scic)); return ret; } ret = intel_gvt_hypervisor_write_gpa(vgpu, parm_pa, &parm, sizeof(parm)); if (ret) { gvt_vgpu_err("guest opregion write error %d, gpa 0x%llx, len %lu\n", ret, scic_pa, sizeof(scic)); return ret; } break; default: gvt_vgpu_err("not supported hypervisor\n"); return -EINVAL; } return 0; }