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linux/drivers/gpu/drm/i915/gvt/opregion.c
Xiong Zhang b2d6ef7061 drm/i915/gvt: Let each vgpu has separate opregion memory 
Currently every vgpu share a common gvt opregion memory, but
it is freed at vgpu destroy, then the later vgpu doesn't have
opregion memory once the first vgpu is destroyed. This cause
guest function failure like reboot, second or later boot.

This patch allocate and init virt opregion memory for each
vgpu, so this memory could be freed at vgpu destroy.

Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
2017-11-16 11:48:35 +08:00

497 lines
12 KiB
C
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/*
* 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 <linux/acpi.h>
#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 "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
#define DEV_SIZE 38
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;
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;
u8 dp_usb_type_c:1; /* 195 */
u8 skip6:7;
u8 dp_usb_type_c_2x_gpio_index; /* 195 */
u16 dp_usb_type_c_2x_gpio_pin; /* 195 */
u8 iboost_dp:4; /* 196 */
u8 iboost_hdmi:4; /* 196 */
} __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) - sizeof(v->header);
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 = 38 */
v->bdb_header.header_size = sizeof(v->bdb_header);
v->bdb_header.bdb_size = sizeof(struct vbt) - sizeof(struct vbt_header)
- sizeof(struct bdb_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_header.id = BDB_GENERAL_DEFINITIONS;
/* size will include child devices */
v->general_definitions_header.size =
sizeof(struct bdb_general_definitions) + num_child * DEV_SIZE;
v->general_definitions.child_dev_size = 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;
}
static int alloc_and_init_virt_opregion(struct intel_vgpu *vgpu)
{
u8 *buf;
struct opregion_header *header;
struct vbt v;
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 init_vgpu_opregion(struct intel_vgpu *vgpu, u32 gpa)
{
int i, ret;
if (WARN((vgpu_opregion(vgpu)->va),
"vgpu%d: opregion has been initialized already.\n",
vgpu->id))
return -EINVAL;
ret = alloc_and_init_virt_opregion(vgpu);
if (ret < 0)
return ret;
for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++)
vgpu_opregion(vgpu)->gfn[i] = (gpa >> PAGE_SHIFT) + i;
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;
}
}
return 0;
}
/**
* 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) {
map_vgpu_opregion(vgpu, false);
free_pages((unsigned long)vgpu_opregion(vgpu)->va,
get_order(INTEL_GVT_OPREGION_SIZE));
vgpu_opregion(vgpu)->va = NULL;
}
}
/**
* intel_vgpu_init_opregion - initialize the stuff used to emulate opregion
* @vgpu: a vGPU
* @gpa: guest physical address of opregion
*
* Returns:
* Zero on success, negative error code if failed.
*/
int intel_vgpu_init_opregion(struct intel_vgpu *vgpu, u32 gpa)
{
int ret;
gvt_dbg_core("vgpu%d: init vgpu opregion\n", vgpu->id);
if (intel_gvt_host.hypervisor_type == INTEL_GVT_HYPERVISOR_XEN) {
gvt_dbg_core("emulate opregion from kernel\n");
ret = init_vgpu_opregion(vgpu, gpa);
if (ret)
return ret;
ret = map_vgpu_opregion(vgpu, true);
if (ret)
return ret;
}
return 0;
}
#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;
scic = vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_SCIC;
parm = vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_PARM;
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;
return 0;
}
*scic = 0;
*parm = 0;
return 0;
}
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