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linux_dsm_epyc7002/drivers/gpu/drm/i915/gvt/display.c
Zhenyu Wang feddf6e866 drm/i915/gvt: clean up intel_gvt.h as interface for i915 core 
i915 core should only call functions and structures exposed through
intel_gvt.h. Remove internal gvt.h and i915_pvinfo.h.

Change for internal intel_gvt structure as private handler which
not requires to expose gvt internal structure for i915 core.

v2: Fix per Chris's comment
- carefully handle dev_priv->gvt assignment
- add necessary bracket for macro helper
- forward declartion struct intel_gvt
- keep free operation within same file handling alloc

v3: fix use after free and remove intel_gvt.initialized

v4: change to_gvt() to an inline

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
2016-10-20 17:18:30 +08:00

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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.
*
* Authors:
* Ke Yu
* Zhiyuan Lv <zhiyuan.lv@intel.com>
*
* Contributors:
* Terrence Xu <terrence.xu@intel.com>
* Changbin Du <changbin.du@intel.com>
* Bing Niu <bing.niu@intel.com>
* Zhi Wang <zhi.a.wang@intel.com>
*
*/
#include "i915_drv.h"
#include "gvt.h"
static int get_edp_pipe(struct intel_vgpu *vgpu)
{
u32 data = vgpu_vreg(vgpu, _TRANS_DDI_FUNC_CTL_EDP);
int pipe = -1;
switch (data & TRANS_DDI_EDP_INPUT_MASK) {
case TRANS_DDI_EDP_INPUT_A_ON:
case TRANS_DDI_EDP_INPUT_A_ONOFF:
pipe = PIPE_A;
break;
case TRANS_DDI_EDP_INPUT_B_ONOFF:
pipe = PIPE_B;
break;
case TRANS_DDI_EDP_INPUT_C_ONOFF:
pipe = PIPE_C;
break;
}
return pipe;
}
static int edp_pipe_is_enabled(struct intel_vgpu *vgpu)
{
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
if (!(vgpu_vreg(vgpu, PIPECONF(_PIPE_EDP)) & PIPECONF_ENABLE))
return 0;
if (!(vgpu_vreg(vgpu, _TRANS_DDI_FUNC_CTL_EDP) & TRANS_DDI_FUNC_ENABLE))
return 0;
return 1;
}
static int pipe_is_enabled(struct intel_vgpu *vgpu, int pipe)
{
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
if (WARN_ON(pipe < PIPE_A || pipe >= I915_MAX_PIPES))
return -EINVAL;
if (vgpu_vreg(vgpu, PIPECONF(pipe)) & PIPECONF_ENABLE)
return 1;
if (edp_pipe_is_enabled(vgpu) &&
get_edp_pipe(vgpu) == pipe)
return 1;
return 0;
}
/* EDID with 1024x768 as its resolution */
static unsigned char virtual_dp_monitor_edid[] = {
/*Header*/
0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00,
/* Vendor & Product Identification */
0x22, 0xf0, 0x54, 0x29, 0x00, 0x00, 0x00, 0x00, 0x04, 0x17,
/* Version & Revision */
0x01, 0x04,
/* Basic Display Parameters & Features */
0xa5, 0x34, 0x20, 0x78, 0x23,
/* Color Characteristics */
0xfc, 0x81, 0xa4, 0x55, 0x4d, 0x9d, 0x25, 0x12, 0x50, 0x54,
/* Established Timings: maximum resolution is 1024x768 */
0x21, 0x08, 0x00,
/* Standard Timings. All invalid */
0x00, 0xc0, 0x00, 0xc0, 0x00, 0x40, 0x00, 0x80, 0x00, 0x00,
0x00, 0x40, 0x00, 0x00, 0x00, 0x01,
/* 18 Byte Data Blocks 1: invalid */
0x00, 0x00, 0x80, 0xa0, 0x70, 0xb0,
0x23, 0x40, 0x30, 0x20, 0x36, 0x00, 0x06, 0x44, 0x21, 0x00, 0x00, 0x1a,
/* 18 Byte Data Blocks 2: invalid */
0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 0x3c, 0x18, 0x50, 0x11, 0x00, 0x0a,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
/* 18 Byte Data Blocks 3: invalid */
0x00, 0x00, 0x00, 0xfc, 0x00, 0x48,
0x50, 0x20, 0x5a, 0x52, 0x32, 0x34, 0x34, 0x30, 0x77, 0x0a, 0x20, 0x20,
/* 18 Byte Data Blocks 4: invalid */
0x00, 0x00, 0x00, 0xff, 0x00, 0x43, 0x4e, 0x34, 0x33, 0x30, 0x34, 0x30,
0x44, 0x58, 0x51, 0x0a, 0x20, 0x20,
/* Extension Block Count */
0x00,
/* Checksum */
0xef,
};
#define DPCD_HEADER_SIZE 0xb
u8 dpcd_fix_data[DPCD_HEADER_SIZE] = {
0x11, 0x0a, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static void emulate_monitor_status_change(struct intel_vgpu *vgpu)
{
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
vgpu_vreg(vgpu, SDEISR) &= ~(SDE_PORTB_HOTPLUG_CPT |
SDE_PORTC_HOTPLUG_CPT |
SDE_PORTD_HOTPLUG_CPT);
if (IS_SKYLAKE(dev_priv))
vgpu_vreg(vgpu, SDEISR) &= ~(SDE_PORTA_HOTPLUG_SPT |
SDE_PORTE_HOTPLUG_SPT);
if (intel_vgpu_has_monitor_on_port(vgpu, PORT_B))
vgpu_vreg(vgpu, SDEISR) |= SDE_PORTB_HOTPLUG_CPT;
if (intel_vgpu_has_monitor_on_port(vgpu, PORT_C))
vgpu_vreg(vgpu, SDEISR) |= SDE_PORTC_HOTPLUG_CPT;
if (intel_vgpu_has_monitor_on_port(vgpu, PORT_D))
vgpu_vreg(vgpu, SDEISR) |= SDE_PORTD_HOTPLUG_CPT;
if (IS_SKYLAKE(dev_priv) &&
intel_vgpu_has_monitor_on_port(vgpu, PORT_E)) {
vgpu_vreg(vgpu, SDEISR) |= SDE_PORTE_HOTPLUG_SPT;
}
if (intel_vgpu_has_monitor_on_port(vgpu, PORT_A)) {
if (IS_BROADWELL(dev_priv))
vgpu_vreg(vgpu, GEN8_DE_PORT_ISR) |=
GEN8_PORT_DP_A_HOTPLUG;
else
vgpu_vreg(vgpu, SDEISR) |= SDE_PORTA_HOTPLUG_SPT;
}
}
static void clean_virtual_dp_monitor(struct intel_vgpu *vgpu, int port_num)
{
struct intel_vgpu_port *port = intel_vgpu_port(vgpu, port_num);
kfree(port->edid);
port->edid = NULL;
kfree(port->dpcd);
port->dpcd = NULL;
}
static int setup_virtual_dp_monitor(struct intel_vgpu *vgpu, int port_num,
int type)
{
struct intel_vgpu_port *port = intel_vgpu_port(vgpu, port_num);
port->edid = kzalloc(sizeof(*(port->edid)), GFP_KERNEL);
if (!port->edid)
return -ENOMEM;
port->dpcd = kzalloc(sizeof(*(port->dpcd)), GFP_KERNEL);
if (!port->dpcd) {
kfree(port->edid);
return -ENOMEM;
}
memcpy(port->edid->edid_block, virtual_dp_monitor_edid,
EDID_SIZE);
port->edid->data_valid = true;
memcpy(port->dpcd->data, dpcd_fix_data, DPCD_HEADER_SIZE);
port->dpcd->data_valid = true;
port->dpcd->data[DPCD_SINK_COUNT] = 0x1;
port->type = type;
emulate_monitor_status_change(vgpu);
return 0;
}
/**
* intel_gvt_check_vblank_emulation - check if vblank emulation timer should
* be turned on/off when a virtual pipe is enabled/disabled.
* @gvt: a GVT device
*
* This function is used to turn on/off vblank timer according to currently
* enabled/disabled virtual pipes.
*
*/
void intel_gvt_check_vblank_emulation(struct intel_gvt *gvt)
{
struct intel_gvt_irq *irq = &gvt->irq;
struct intel_vgpu *vgpu;
bool have_enabled_pipe = false;
int pipe, id;
if (WARN_ON(!mutex_is_locked(&gvt->lock)))
return;
hrtimer_cancel(&irq->vblank_timer.timer);
for_each_active_vgpu(gvt, vgpu, id) {
for (pipe = 0; pipe < I915_MAX_PIPES; pipe++) {
have_enabled_pipe =
pipe_is_enabled(vgpu, pipe);
if (have_enabled_pipe)
break;
}
}
if (have_enabled_pipe)
hrtimer_start(&irq->vblank_timer.timer,
ktime_add_ns(ktime_get(), irq->vblank_timer.period),
HRTIMER_MODE_ABS);
}
static void emulate_vblank_on_pipe(struct intel_vgpu *vgpu, int pipe)
{
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
struct intel_vgpu_irq *irq = &vgpu->irq;
int vblank_event[] = {
[PIPE_A] = PIPE_A_VBLANK,
[PIPE_B] = PIPE_B_VBLANK,
[PIPE_C] = PIPE_C_VBLANK,
};
int event;
if (pipe < PIPE_A || pipe > PIPE_C)
return;
for_each_set_bit(event, irq->flip_done_event[pipe],
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))
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)
{
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
intel_vgpu_init_i2c_edid(vgpu);
if (IS_SKYLAKE(dev_priv))
return setup_virtual_dp_monitor(vgpu, PORT_D, GVT_DP_D);
else
return setup_virtual_dp_monitor(vgpu, PORT_B, GVT_DP_B);
}
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