mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 15:12:45 +07:00
7e60590208
when i915 driver unloading, it will shutdown all CRTCs and it will introudce kernel panic when conducting igt drv_module_reload test case under guest environment (bug reported by XENGT-468) as below: BUG: unable to handle kernel NULL pointer dereference at 0000000000000070 IP: intel_edp_backlight_off+0xe/0x7c [i915] RIP: 0010:intel_edp_backlight_off+0xe/0x7c [i915] Call Trace: intel_disable_ddi+0xb3/0xbc [i915] intel_modeset_setup_hw_state+0x654/0xb4c [i915] intel_modeset_init+0x9f1/0xe69 [i915] ? intel_i2c_reset+0x3d/0x40 [i915] ? intel_setup_gmbus+0xba/0x249 [i915] i915_driver_load+0xae5/0xcc0 [i915] i915_pci_probe+0x3a/0x3c [i915] local_pci_probe+0x38/0x7b pci_device_probe+0xec/0x12b driver_probe_device+0x134/0x294 __driver_attach+0x6a/0x8c ? driver_probe_device+0x294/0x294 bus_for_each_dev+0x68/0x80 driver_attach+0x19/0x1b bus_add_driver+0xea/0x1d3 ? 0xffffffffa03cd000 driver_register+0x85/0xc1 ? 0xffffffffa03cd000 __pci_register_driver+0x55/0x57 i915_init+0x57/0x5a [i915] do_one_initcall+0x8a/0x12e ? __vunmap+0x8d/0x93 ? kmem_cache_alloc_trace+0x96/0x11c do_init_module+0x5a/0x1e1 in this case, active connector detected but no active pipe available, so it will hang to disable connector. to fix, on vgpu creating, to report active pipe available for guest. Signed-off-by: Xiaolin Zhang <xiaolin.zhang@intel.com> Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
460 lines
14 KiB
C
460 lines
14 KiB
C
/*
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* Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Ke Yu
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* Zhiyuan Lv <zhiyuan.lv@intel.com>
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*
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* Contributors:
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* Terrence Xu <terrence.xu@intel.com>
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* Changbin Du <changbin.du@intel.com>
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* Bing Niu <bing.niu@intel.com>
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* Zhi Wang <zhi.a.wang@intel.com>
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*
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*/
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#include "i915_drv.h"
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#include "gvt.h"
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static int get_edp_pipe(struct intel_vgpu *vgpu)
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{
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u32 data = vgpu_vreg(vgpu, _TRANS_DDI_FUNC_CTL_EDP);
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int pipe = -1;
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switch (data & TRANS_DDI_EDP_INPUT_MASK) {
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case TRANS_DDI_EDP_INPUT_A_ON:
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case TRANS_DDI_EDP_INPUT_A_ONOFF:
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pipe = PIPE_A;
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break;
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case TRANS_DDI_EDP_INPUT_B_ONOFF:
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pipe = PIPE_B;
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break;
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case TRANS_DDI_EDP_INPUT_C_ONOFF:
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pipe = PIPE_C;
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break;
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}
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return pipe;
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}
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static int edp_pipe_is_enabled(struct intel_vgpu *vgpu)
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{
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struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
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if (!(vgpu_vreg(vgpu, PIPECONF(_PIPE_EDP)) & PIPECONF_ENABLE))
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return 0;
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if (!(vgpu_vreg(vgpu, _TRANS_DDI_FUNC_CTL_EDP) & TRANS_DDI_FUNC_ENABLE))
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return 0;
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return 1;
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}
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static int pipe_is_enabled(struct intel_vgpu *vgpu, int pipe)
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{
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struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
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if (WARN_ON(pipe < PIPE_A || pipe >= I915_MAX_PIPES))
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return -EINVAL;
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if (vgpu_vreg(vgpu, PIPECONF(pipe)) & PIPECONF_ENABLE)
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return 1;
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if (edp_pipe_is_enabled(vgpu) &&
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get_edp_pipe(vgpu) == pipe)
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return 1;
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return 0;
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}
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static unsigned char virtual_dp_monitor_edid[GVT_EDID_NUM][EDID_SIZE] = {
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{
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/* EDID with 1024x768 as its resolution */
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/*Header*/
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0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
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/* Vendor & Product Identification */
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0x22, 0xf0, 0x54, 0x29, 0x00, 0x00, 0x00, 0x00, 0x04, 0x17,
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/* Version & Revision */
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0x01, 0x04,
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/* Basic Display Parameters & Features */
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0xa5, 0x34, 0x20, 0x78, 0x23,
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/* Color Characteristics */
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0xfc, 0x81, 0xa4, 0x55, 0x4d, 0x9d, 0x25, 0x12, 0x50, 0x54,
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/* Established Timings: maximum resolution is 1024x768 */
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0x21, 0x08, 0x00,
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/* Standard Timings. All invalid */
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0x00, 0xc0, 0x00, 0xc0, 0x00, 0x40, 0x00, 0x80, 0x00, 0x00,
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0x00, 0x40, 0x00, 0x00, 0x00, 0x01,
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/* 18 Byte Data Blocks 1: invalid */
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0x00, 0x00, 0x80, 0xa0, 0x70, 0xb0,
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0x23, 0x40, 0x30, 0x20, 0x36, 0x00, 0x06, 0x44, 0x21, 0x00, 0x00, 0x1a,
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/* 18 Byte Data Blocks 2: invalid */
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0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 0x3c, 0x18, 0x50, 0x11, 0x00, 0x0a,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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/* 18 Byte Data Blocks 3: invalid */
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0x00, 0x00, 0x00, 0xfc, 0x00, 0x48,
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0x50, 0x20, 0x5a, 0x52, 0x32, 0x34, 0x34, 0x30, 0x77, 0x0a, 0x20, 0x20,
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/* 18 Byte Data Blocks 4: invalid */
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0x00, 0x00, 0x00, 0xff, 0x00, 0x43, 0x4e, 0x34, 0x33, 0x30, 0x34, 0x30,
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0x44, 0x58, 0x51, 0x0a, 0x20, 0x20,
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/* Extension Block Count */
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0x00,
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/* Checksum */
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0xef,
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},
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{
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/* EDID with 1920x1200 as its resolution */
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/*Header*/
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0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
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/* Vendor & Product Identification */
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0x22, 0xf0, 0x54, 0x29, 0x00, 0x00, 0x00, 0x00, 0x04, 0x17,
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/* Version & Revision */
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0x01, 0x04,
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/* Basic Display Parameters & Features */
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0xa5, 0x34, 0x20, 0x78, 0x23,
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/* Color Characteristics */
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0xfc, 0x81, 0xa4, 0x55, 0x4d, 0x9d, 0x25, 0x12, 0x50, 0x54,
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/* Established Timings: maximum resolution is 1024x768 */
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0x21, 0x08, 0x00,
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/*
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* Standard Timings.
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* below new resolutions can be supported:
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* 1920x1080, 1280x720, 1280x960, 1280x1024,
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* 1440x900, 1600x1200, 1680x1050
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*/
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0xd1, 0xc0, 0x81, 0xc0, 0x81, 0x40, 0x81, 0x80, 0x95, 0x00,
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0xa9, 0x40, 0xb3, 0x00, 0x01, 0x01,
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/* 18 Byte Data Blocks 1: max resolution is 1920x1200 */
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0x28, 0x3c, 0x80, 0xa0, 0x70, 0xb0,
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0x23, 0x40, 0x30, 0x20, 0x36, 0x00, 0x06, 0x44, 0x21, 0x00, 0x00, 0x1a,
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/* 18 Byte Data Blocks 2: invalid */
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0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 0x3c, 0x18, 0x50, 0x11, 0x00, 0x0a,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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/* 18 Byte Data Blocks 3: invalid */
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0x00, 0x00, 0x00, 0xfc, 0x00, 0x48,
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0x50, 0x20, 0x5a, 0x52, 0x32, 0x34, 0x34, 0x30, 0x77, 0x0a, 0x20, 0x20,
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/* 18 Byte Data Blocks 4: invalid */
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0x00, 0x00, 0x00, 0xff, 0x00, 0x43, 0x4e, 0x34, 0x33, 0x30, 0x34, 0x30,
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0x44, 0x58, 0x51, 0x0a, 0x20, 0x20,
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/* Extension Block Count */
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0x00,
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/* Checksum */
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0x45,
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},
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};
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#define DPCD_HEADER_SIZE 0xb
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/* let the virtual display supports DP1.2 */
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static u8 dpcd_fix_data[DPCD_HEADER_SIZE] = {
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0x12, 0x014, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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static void emulate_monitor_status_change(struct intel_vgpu *vgpu)
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{
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struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
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vgpu_vreg(vgpu, SDEISR) &= ~(SDE_PORTB_HOTPLUG_CPT |
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SDE_PORTC_HOTPLUG_CPT |
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SDE_PORTD_HOTPLUG_CPT);
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if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
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vgpu_vreg(vgpu, SDEISR) &= ~(SDE_PORTA_HOTPLUG_SPT |
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SDE_PORTE_HOTPLUG_SPT);
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vgpu_vreg(vgpu, SKL_FUSE_STATUS) |=
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SKL_FUSE_DOWNLOAD_STATUS |
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SKL_FUSE_PG_DIST_STATUS(SKL_PG0) |
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SKL_FUSE_PG_DIST_STATUS(SKL_PG1) |
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SKL_FUSE_PG_DIST_STATUS(SKL_PG2);
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vgpu_vreg(vgpu, LCPLL1_CTL) |=
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LCPLL_PLL_ENABLE |
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LCPLL_PLL_LOCK;
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vgpu_vreg(vgpu, LCPLL2_CTL) |= LCPLL_PLL_ENABLE;
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}
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if (intel_vgpu_has_monitor_on_port(vgpu, PORT_B)) {
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vgpu_vreg(vgpu, SFUSE_STRAP) |= SFUSE_STRAP_DDIB_DETECTED;
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vgpu_vreg(vgpu, TRANS_DDI_FUNC_CTL(TRANSCODER_A)) &=
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~(TRANS_DDI_BPC_MASK | TRANS_DDI_MODE_SELECT_MASK |
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TRANS_DDI_PORT_MASK);
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vgpu_vreg(vgpu, TRANS_DDI_FUNC_CTL(TRANSCODER_A)) |=
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(TRANS_DDI_BPC_8 | TRANS_DDI_MODE_SELECT_DP_SST |
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(PORT_B << TRANS_DDI_PORT_SHIFT) |
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TRANS_DDI_FUNC_ENABLE);
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if (IS_BROADWELL(dev_priv)) {
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vgpu_vreg(vgpu, PORT_CLK_SEL(PORT_B)) &=
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~PORT_CLK_SEL_MASK;
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vgpu_vreg(vgpu, PORT_CLK_SEL(PORT_B)) |=
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PORT_CLK_SEL_LCPLL_810;
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}
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vgpu_vreg(vgpu, DDI_BUF_CTL(PORT_B)) |= DDI_BUF_CTL_ENABLE;
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vgpu_vreg(vgpu, DDI_BUF_CTL(PORT_B)) &= ~DDI_BUF_IS_IDLE;
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vgpu_vreg(vgpu, SDEISR) |= SDE_PORTB_HOTPLUG_CPT;
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}
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if (intel_vgpu_has_monitor_on_port(vgpu, PORT_C)) {
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vgpu_vreg(vgpu, SDEISR) |= SDE_PORTC_HOTPLUG_CPT;
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vgpu_vreg(vgpu, TRANS_DDI_FUNC_CTL(TRANSCODER_A)) &=
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~(TRANS_DDI_BPC_MASK | TRANS_DDI_MODE_SELECT_MASK |
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TRANS_DDI_PORT_MASK);
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vgpu_vreg(vgpu, TRANS_DDI_FUNC_CTL(TRANSCODER_A)) |=
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(TRANS_DDI_BPC_8 | TRANS_DDI_MODE_SELECT_DP_SST |
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(PORT_C << TRANS_DDI_PORT_SHIFT) |
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TRANS_DDI_FUNC_ENABLE);
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if (IS_BROADWELL(dev_priv)) {
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vgpu_vreg(vgpu, PORT_CLK_SEL(PORT_C)) &=
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~PORT_CLK_SEL_MASK;
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vgpu_vreg(vgpu, PORT_CLK_SEL(PORT_C)) |=
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PORT_CLK_SEL_LCPLL_810;
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}
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vgpu_vreg(vgpu, DDI_BUF_CTL(PORT_C)) |= DDI_BUF_CTL_ENABLE;
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vgpu_vreg(vgpu, DDI_BUF_CTL(PORT_C)) &= ~DDI_BUF_IS_IDLE;
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vgpu_vreg(vgpu, SFUSE_STRAP) |= SFUSE_STRAP_DDIC_DETECTED;
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}
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if (intel_vgpu_has_monitor_on_port(vgpu, PORT_D)) {
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vgpu_vreg(vgpu, SDEISR) |= SDE_PORTD_HOTPLUG_CPT;
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vgpu_vreg(vgpu, TRANS_DDI_FUNC_CTL(TRANSCODER_A)) &=
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~(TRANS_DDI_BPC_MASK | TRANS_DDI_MODE_SELECT_MASK |
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TRANS_DDI_PORT_MASK);
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vgpu_vreg(vgpu, TRANS_DDI_FUNC_CTL(TRANSCODER_A)) |=
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(TRANS_DDI_BPC_8 | TRANS_DDI_MODE_SELECT_DP_SST |
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(PORT_D << TRANS_DDI_PORT_SHIFT) |
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TRANS_DDI_FUNC_ENABLE);
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if (IS_BROADWELL(dev_priv)) {
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vgpu_vreg(vgpu, PORT_CLK_SEL(PORT_D)) &=
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~PORT_CLK_SEL_MASK;
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vgpu_vreg(vgpu, PORT_CLK_SEL(PORT_D)) |=
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PORT_CLK_SEL_LCPLL_810;
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}
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vgpu_vreg(vgpu, DDI_BUF_CTL(PORT_D)) |= DDI_BUF_CTL_ENABLE;
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vgpu_vreg(vgpu, DDI_BUF_CTL(PORT_D)) &= ~DDI_BUF_IS_IDLE;
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vgpu_vreg(vgpu, SFUSE_STRAP) |= SFUSE_STRAP_DDID_DETECTED;
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}
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if ((IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) &&
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intel_vgpu_has_monitor_on_port(vgpu, PORT_E)) {
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vgpu_vreg(vgpu, SDEISR) |= SDE_PORTE_HOTPLUG_SPT;
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}
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if (intel_vgpu_has_monitor_on_port(vgpu, PORT_A)) {
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if (IS_BROADWELL(dev_priv))
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vgpu_vreg(vgpu, GEN8_DE_PORT_ISR) |=
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GEN8_PORT_DP_A_HOTPLUG;
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else
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vgpu_vreg(vgpu, SDEISR) |= SDE_PORTA_HOTPLUG_SPT;
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vgpu_vreg(vgpu, DDI_BUF_CTL(PORT_A)) |= DDI_INIT_DISPLAY_DETECTED;
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}
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/* Clear host CRT status, so guest couldn't detect this host CRT. */
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if (IS_BROADWELL(dev_priv))
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vgpu_vreg(vgpu, PCH_ADPA) &= ~ADPA_CRT_HOTPLUG_MONITOR_MASK;
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}
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static void clean_virtual_dp_monitor(struct intel_vgpu *vgpu, int port_num)
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{
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struct intel_vgpu_port *port = intel_vgpu_port(vgpu, port_num);
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kfree(port->edid);
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port->edid = NULL;
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kfree(port->dpcd);
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port->dpcd = NULL;
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}
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static int setup_virtual_dp_monitor(struct intel_vgpu *vgpu, int port_num,
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int type, unsigned int resolution)
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{
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struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
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struct intel_vgpu_port *port = intel_vgpu_port(vgpu, port_num);
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if (WARN_ON(resolution >= GVT_EDID_NUM))
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return -EINVAL;
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port->edid = kzalloc(sizeof(*(port->edid)), GFP_KERNEL);
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if (!port->edid)
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return -ENOMEM;
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port->dpcd = kzalloc(sizeof(*(port->dpcd)), GFP_KERNEL);
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if (!port->dpcd) {
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kfree(port->edid);
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return -ENOMEM;
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}
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memcpy(port->edid->edid_block, virtual_dp_monitor_edid[resolution],
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EDID_SIZE);
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port->edid->data_valid = true;
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memcpy(port->dpcd->data, dpcd_fix_data, DPCD_HEADER_SIZE);
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port->dpcd->data_valid = true;
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port->dpcd->data[DPCD_SINK_COUNT] = 0x1;
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port->type = type;
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emulate_monitor_status_change(vgpu);
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vgpu_vreg(vgpu, PIPECONF(PIPE_A)) |= PIPECONF_ENABLE;
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return 0;
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}
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/**
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* intel_gvt_check_vblank_emulation - check if vblank emulation timer should
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* be turned on/off when a virtual pipe is enabled/disabled.
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* @gvt: a GVT device
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*
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* This function is used to turn on/off vblank timer according to currently
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* enabled/disabled virtual pipes.
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*
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*/
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void intel_gvt_check_vblank_emulation(struct intel_gvt *gvt)
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{
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struct intel_gvt_irq *irq = &gvt->irq;
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struct intel_vgpu *vgpu;
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int pipe, id;
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if (WARN_ON(!mutex_is_locked(&gvt->lock)))
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return;
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for_each_active_vgpu(gvt, vgpu, id) {
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for (pipe = 0; pipe < I915_MAX_PIPES; pipe++) {
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if (pipe_is_enabled(vgpu, pipe))
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goto out;
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}
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}
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/* all the pipes are disabled */
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hrtimer_cancel(&irq->vblank_timer.timer);
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return;
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out:
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hrtimer_start(&irq->vblank_timer.timer,
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ktime_add_ns(ktime_get(), irq->vblank_timer.period),
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HRTIMER_MODE_ABS);
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}
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static void emulate_vblank_on_pipe(struct intel_vgpu *vgpu, int pipe)
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{
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struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
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struct intel_vgpu_irq *irq = &vgpu->irq;
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int vblank_event[] = {
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[PIPE_A] = PIPE_A_VBLANK,
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[PIPE_B] = PIPE_B_VBLANK,
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[PIPE_C] = PIPE_C_VBLANK,
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};
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int event;
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if (pipe < PIPE_A || pipe > PIPE_C)
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return;
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for_each_set_bit(event, irq->flip_done_event[pipe],
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INTEL_GVT_EVENT_MAX) {
|
|
clear_bit(event, irq->flip_done_event[pipe]);
|
|
if (!pipe_is_enabled(vgpu, pipe))
|
|
continue;
|
|
|
|
vgpu_vreg(vgpu, PIPE_FLIPCOUNT_G4X(pipe))++;
|
|
intel_vgpu_trigger_virtual_event(vgpu, event);
|
|
}
|
|
|
|
if (pipe_is_enabled(vgpu, pipe)) {
|
|
vgpu_vreg(vgpu, PIPE_FRMCOUNT_G4X(pipe))++;
|
|
intel_vgpu_trigger_virtual_event(vgpu, vblank_event[pipe]);
|
|
}
|
|
}
|
|
|
|
static void emulate_vblank(struct intel_vgpu *vgpu)
|
|
{
|
|
int pipe;
|
|
|
|
for_each_pipe(vgpu->gvt->dev_priv, pipe)
|
|
emulate_vblank_on_pipe(vgpu, pipe);
|
|
}
|
|
|
|
/**
|
|
* intel_gvt_emulate_vblank - trigger vblank events for vGPUs on GVT device
|
|
* @gvt: a GVT device
|
|
*
|
|
* This function is used to trigger vblank interrupts for vGPUs on GVT device
|
|
*
|
|
*/
|
|
void intel_gvt_emulate_vblank(struct intel_gvt *gvt)
|
|
{
|
|
struct intel_vgpu *vgpu;
|
|
int id;
|
|
|
|
if (WARN_ON(!mutex_is_locked(&gvt->lock)))
|
|
return;
|
|
|
|
for_each_active_vgpu(gvt, vgpu, id)
|
|
emulate_vblank(vgpu);
|
|
}
|
|
|
|
/**
|
|
* intel_vgpu_clean_display - clean vGPU virtual display emulation
|
|
* @vgpu: a vGPU
|
|
*
|
|
* This function is used to clean vGPU virtual display emulation stuffs
|
|
*
|
|
*/
|
|
void intel_vgpu_clean_display(struct intel_vgpu *vgpu)
|
|
{
|
|
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
|
|
|
|
if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
|
|
clean_virtual_dp_monitor(vgpu, PORT_D);
|
|
else
|
|
clean_virtual_dp_monitor(vgpu, PORT_B);
|
|
}
|
|
|
|
/**
|
|
* intel_vgpu_init_display- initialize vGPU virtual display emulation
|
|
* @vgpu: a vGPU
|
|
*
|
|
* This function is used to initialize vGPU virtual display emulation stuffs
|
|
*
|
|
* Returns:
|
|
* Zero on success, negative error code if failed.
|
|
*
|
|
*/
|
|
int intel_vgpu_init_display(struct intel_vgpu *vgpu, u64 resolution)
|
|
{
|
|
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
|
|
|
|
intel_vgpu_init_i2c_edid(vgpu);
|
|
|
|
if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
|
|
return setup_virtual_dp_monitor(vgpu, PORT_D, GVT_DP_D,
|
|
resolution);
|
|
else
|
|
return setup_virtual_dp_monitor(vgpu, PORT_B, GVT_DP_B,
|
|
resolution);
|
|
}
|
|
|
|
/**
|
|
* intel_vgpu_reset_display- reset vGPU virtual display emulation
|
|
* @vgpu: a vGPU
|
|
*
|
|
* This function is used to reset vGPU virtual display emulation stuffs
|
|
*
|
|
*/
|
|
void intel_vgpu_reset_display(struct intel_vgpu *vgpu)
|
|
{
|
|
emulate_monitor_status_change(vgpu);
|
|
}
|