kolibrios/drivers/video/drm/i915/i915_drv.c

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/* i915_drv.c -- i830,i845,i855,i865,i915 driver -*- linux-c -*-
*/
/*
*
* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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, sub license, 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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/device.h>
#include <drm/drmP.h>
#include <drm/i915_drm.h>
#include "i915_drv.h"
#include "intel_drv.h"
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <errno-base.h>
#include <linux/pci.h>
#include <drm/drm_crtc_helper.h>
#include <syscall.h>
#define __read_mostly
int init_display_kms(struct drm_device *dev);
static int i915_modeset __read_mostly = 1;
module_param_named(modeset, i915_modeset, int, 0400);
MODULE_PARM_DESC(modeset,
"Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
"1=on, -1=force vga console preference [default])");
unsigned int i915_fbpercrtc __always_unused = 0;
module_param_named(fbpercrtc, i915_fbpercrtc, int, 0400);
int i915_panel_ignore_lid __read_mostly = 1;
module_param_named(panel_ignore_lid, i915_panel_ignore_lid, int, 0600);
MODULE_PARM_DESC(panel_ignore_lid,
"Override lid status (0=autodetect, 1=autodetect disabled [default], "
"-1=force lid closed, -2=force lid open)");
unsigned int i915_powersave __read_mostly = 1;
module_param_named(powersave, i915_powersave, int, 0600);
MODULE_PARM_DESC(powersave,
"Enable powersavings, fbc, downclocking, etc. (default: true)");
int i915_semaphores __read_mostly = -1;
module_param_named(semaphores, i915_semaphores, int, 0600);
MODULE_PARM_DESC(semaphores,
"Use semaphores for inter-ring sync (default: -1 (use per-chip defaults))");
int i915_enable_rc6 __read_mostly = -1;
module_param_named(i915_enable_rc6, i915_enable_rc6, int, 0400);
MODULE_PARM_DESC(i915_enable_rc6,
"Enable power-saving render C-state 6. "
"Different stages can be selected via bitmask values "
"(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
"For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
"default: -1 (use per-chip default)");
int i915_enable_fbc __read_mostly = -1;
module_param_named(i915_enable_fbc, i915_enable_fbc, int, 0600);
MODULE_PARM_DESC(i915_enable_fbc,
"Enable frame buffer compression for power savings "
"(default: -1 (use per-chip default))");
unsigned int i915_lvds_downclock __read_mostly = 0;
module_param_named(lvds_downclock, i915_lvds_downclock, int, 0400);
MODULE_PARM_DESC(lvds_downclock,
"Use panel (LVDS/eDP) downclocking for power savings "
"(default: false)");
int i915_lvds_channel_mode __read_mostly;
module_param_named(lvds_channel_mode, i915_lvds_channel_mode, int, 0600);
MODULE_PARM_DESC(lvds_channel_mode,
"Specify LVDS channel mode "
"(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
int i915_panel_use_ssc __read_mostly = -1;
module_param_named(lvds_use_ssc, i915_panel_use_ssc, int, 0600);
MODULE_PARM_DESC(lvds_use_ssc,
"Use Spread Spectrum Clock with panels [LVDS/eDP] "
"(default: auto from VBT)");
int i915_vbt_sdvo_panel_type __read_mostly = -1;
module_param_named(vbt_sdvo_panel_type, i915_vbt_sdvo_panel_type, int, 0600);
MODULE_PARM_DESC(vbt_sdvo_panel_type,
"Override/Ignore selection of SDVO panel mode in the VBT "
"(-2=ignore, -1=auto [default], index in VBT BIOS table)");
static bool i915_try_reset __read_mostly = true;
module_param_named(reset, i915_try_reset, bool, 0600);
MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
bool i915_enable_hangcheck __read_mostly = false;
module_param_named(enable_hangcheck, i915_enable_hangcheck, bool, 0644);
MODULE_PARM_DESC(enable_hangcheck,
"Periodically check GPU activity for detecting hangs. "
"WARNING: Disabling this can cause system wide hangs. "
"(default: true)");
int i915_enable_ppgtt __read_mostly = 0;
module_param_named(i915_enable_ppgtt, i915_enable_ppgtt, int, 0600);
MODULE_PARM_DESC(i915_enable_ppgtt,
"Enable PPGTT (default: true)");
int i915_enable_psr __read_mostly = 0;
module_param_named(enable_psr, i915_enable_psr, int, 0600);
MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");
unsigned int i915_preliminary_hw_support __read_mostly = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT);
module_param_named(preliminary_hw_support, i915_preliminary_hw_support, int, 0600);
MODULE_PARM_DESC(preliminary_hw_support,
"Enable preliminary hardware support.");
int i915_disable_power_well __read_mostly = 0;
module_param_named(disable_power_well, i915_disable_power_well, int, 0600);
MODULE_PARM_DESC(disable_power_well,
"Disable the power well when possible (default: true)");
int i915_enable_ips __read_mostly = 1;
module_param_named(enable_ips, i915_enable_ips, int, 0600);
MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
bool i915_fastboot __read_mostly = 0;
module_param_named(fastboot, i915_fastboot, bool, 0600);
MODULE_PARM_DESC(fastboot, "Try to skip unnecessary mode sets at boot time "
"(default: false)");
int i915_enable_pc8 __read_mostly = 0;
module_param_named(enable_pc8, i915_enable_pc8, int, 0600);
MODULE_PARM_DESC(enable_pc8, "Enable support for low power package C states (PC8+) (default: true)");
int i915_pc8_timeout __read_mostly = 5000;
module_param_named(pc8_timeout, i915_pc8_timeout, int, 0600);
MODULE_PARM_DESC(pc8_timeout, "Number of msecs of idleness required to enter PC8+ (default: 5000)");
bool i915_prefault_disable __read_mostly;
module_param_named(prefault_disable, i915_prefault_disable, bool, 0600);
MODULE_PARM_DESC(prefault_disable,
"Disable page prefaulting for pread/pwrite/reloc (default:false). For developers only.");
static struct drm_driver driver;
extern int intel_agp_enabled;
#define PCI_VENDOR_ID_INTEL 0x8086
static const struct intel_device_info intel_i915g_info = {
.gen = 3, .is_i915g = 1, .cursor_needs_physical = 1, .num_pipes = 2,
.has_overlay = 1, .overlay_needs_physical = 1,
};
static const struct intel_device_info intel_i915gm_info = {
.gen = 3, .is_mobile = 1, .num_pipes = 2,
.cursor_needs_physical = 1,
.has_overlay = 1, .overlay_needs_physical = 1,
.supports_tv = 1,
};
static const struct intel_device_info intel_i945g_info = {
.gen = 3, .has_hotplug = 1, .cursor_needs_physical = 1, .num_pipes = 2,
.has_overlay = 1, .overlay_needs_physical = 1,
};
static const struct intel_device_info intel_i945gm_info = {
.gen = 3, .is_i945gm = 1, .is_mobile = 1, .num_pipes = 2,
.has_hotplug = 1, .cursor_needs_physical = 1,
.has_overlay = 1, .overlay_needs_physical = 1,
.supports_tv = 1,
};
static const struct intel_device_info intel_i965g_info = {
.gen = 4, .is_broadwater = 1, .num_pipes = 2,
.has_hotplug = 1,
.has_overlay = 1,
};
static const struct intel_device_info intel_i965gm_info = {
.gen = 4, .is_crestline = 1, .num_pipes = 2,
.is_mobile = 1, .has_fbc = 1, .has_hotplug = 1,
.has_overlay = 1,
.supports_tv = 1,
};
static const struct intel_device_info intel_g33_info = {
.gen = 3, .is_g33 = 1, .num_pipes = 2,
.need_gfx_hws = 1, .has_hotplug = 1,
.has_overlay = 1,
};
static const struct intel_device_info intel_g45_info = {
.gen = 4, .is_g4x = 1, .need_gfx_hws = 1, .num_pipes = 2,
.has_pipe_cxsr = 1, .has_hotplug = 1,
.has_bsd_ring = 1,
};
static const struct intel_device_info intel_gm45_info = {
.gen = 4, .is_g4x = 1, .num_pipes = 2,
.is_mobile = 1, .need_gfx_hws = 1, .has_fbc = 1,
.has_pipe_cxsr = 1, .has_hotplug = 1,
.supports_tv = 1,
.has_bsd_ring = 1,
};
static const struct intel_device_info intel_pineview_info = {
.gen = 3, .is_g33 = 1, .is_pineview = 1, .is_mobile = 1, .num_pipes = 2,
.need_gfx_hws = 1, .has_hotplug = 1,
.has_overlay = 1,
};
static const struct intel_device_info intel_ironlake_d_info = {
.gen = 5, .num_pipes = 2,
.need_gfx_hws = 1, .has_hotplug = 1,
.has_bsd_ring = 1,
};
static const struct intel_device_info intel_ironlake_m_info = {
.gen = 5, .is_mobile = 1, .num_pipes = 2,
.need_gfx_hws = 1, .has_hotplug = 1,
.has_fbc = 1,
.has_bsd_ring = 1,
};
static const struct intel_device_info intel_sandybridge_d_info = {
.gen = 6, .num_pipes = 2,
.need_gfx_hws = 1, .has_hotplug = 1,
.has_bsd_ring = 1,
.has_blt_ring = 1,
.has_llc = 1,
.has_force_wake = 1,
};
static const struct intel_device_info intel_sandybridge_m_info = {
.gen = 6, .is_mobile = 1, .num_pipes = 2,
.need_gfx_hws = 1, .has_hotplug = 1,
.has_fbc = 1,
.has_bsd_ring = 1,
.has_blt_ring = 1,
.has_llc = 1,
.has_force_wake = 1,
};
#define GEN7_FEATURES \
.gen = 7, .num_pipes = 3, \
.need_gfx_hws = 1, .has_hotplug = 1, \
.has_bsd_ring = 1, \
.has_blt_ring = 1, \
.has_llc = 1, \
.has_force_wake = 1
static const struct intel_device_info intel_ivybridge_d_info = {
GEN7_FEATURES,
.is_ivybridge = 1,
};
static const struct intel_device_info intel_ivybridge_m_info = {
GEN7_FEATURES,
.is_ivybridge = 1,
.is_mobile = 1,
.has_fbc = 1,
};
static const struct intel_device_info intel_ivybridge_q_info = {
GEN7_FEATURES,
.is_ivybridge = 1,
.num_pipes = 0, /* legal, last one wins */
};
static const struct intel_device_info intel_valleyview_m_info = {
GEN7_FEATURES,
.is_mobile = 1,
.num_pipes = 2,
.is_valleyview = 1,
.display_mmio_offset = VLV_DISPLAY_BASE,
.has_llc = 0, /* legal, last one wins */
};
static const struct intel_device_info intel_valleyview_d_info = {
GEN7_FEATURES,
.num_pipes = 2,
.is_valleyview = 1,
.display_mmio_offset = VLV_DISPLAY_BASE,
.has_llc = 0, /* legal, last one wins */
};
static const struct intel_device_info intel_haswell_d_info = {
GEN7_FEATURES,
.is_haswell = 1,
.has_ddi = 1,
.has_fpga_dbg = 1,
.has_vebox_ring = 1,
};
static const struct intel_device_info intel_haswell_m_info = {
GEN7_FEATURES,
.is_haswell = 1,
.is_mobile = 1,
.has_ddi = 1,
.has_fpga_dbg = 1,
.has_fbc = 1,
.has_vebox_ring = 1,
};
/*
* Make sure any device matches here are from most specific to most
* general. For example, since the Quanta match is based on the subsystem
* and subvendor IDs, we need it to come before the more general IVB
* PCI ID matches, otherwise we'll use the wrong info struct above.
*/
#define INTEL_PCI_IDS \
INTEL_I915G_IDS(&intel_i915g_info), \
INTEL_I915GM_IDS(&intel_i915gm_info), \
INTEL_I945G_IDS(&intel_i945g_info), \
INTEL_I945GM_IDS(&intel_i945gm_info), \
INTEL_I965G_IDS(&intel_i965g_info), \
INTEL_G33_IDS(&intel_g33_info), \
INTEL_I965GM_IDS(&intel_i965gm_info), \
INTEL_GM45_IDS(&intel_gm45_info), \
INTEL_G45_IDS(&intel_g45_info), \
INTEL_PINEVIEW_IDS(&intel_pineview_info), \
INTEL_IRONLAKE_D_IDS(&intel_ironlake_d_info), \
INTEL_IRONLAKE_M_IDS(&intel_ironlake_m_info), \
INTEL_SNB_D_IDS(&intel_sandybridge_d_info), \
INTEL_SNB_M_IDS(&intel_sandybridge_m_info), \
INTEL_IVB_Q_IDS(&intel_ivybridge_q_info), /* must be first IVB */ \
INTEL_IVB_M_IDS(&intel_ivybridge_m_info), \
INTEL_IVB_D_IDS(&intel_ivybridge_d_info), \
INTEL_HSW_D_IDS(&intel_haswell_d_info), \
INTEL_HSW_M_IDS(&intel_haswell_m_info), \
INTEL_VLV_M_IDS(&intel_valleyview_m_info), \
INTEL_VLV_D_IDS(&intel_valleyview_d_info)
static const struct pci_device_id pciidlist[] = { /* aka */
INTEL_PCI_IDS,
{0, 0, 0}
};
#define INTEL_PCH_DEVICE_ID_MASK 0xff00
#define INTEL_PCH_IBX_DEVICE_ID_TYPE 0x3b00
#define INTEL_PCH_CPT_DEVICE_ID_TYPE 0x1c00
#define INTEL_PCH_PPT_DEVICE_ID_TYPE 0x1e00
#define INTEL_PCH_LPT_DEVICE_ID_TYPE 0x8c00
void intel_detect_pch(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct pci_dev *pch;
/* In all current cases, num_pipes is equivalent to the PCH_NOP setting
* (which really amounts to a PCH but no South Display).
*/
if (INTEL_INFO(dev)->num_pipes == 0) {
dev_priv->pch_type = PCH_NOP;
return;
}
/*
* The reason to probe ISA bridge instead of Dev31:Fun0 is to
* make graphics device passthrough work easy for VMM, that only
* need to expose ISA bridge to let driver know the real hardware
* underneath. This is a requirement from virtualization team.
*
* In some virtualized environments (e.g. XEN), there is irrelevant
* ISA bridge in the system. To work reliably, we should scan trhough
* all the ISA bridge devices and check for the first match, instead
* of only checking the first one.
*/
pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
while (pch) {
struct pci_dev *curr = pch;
if (pch->vendor == PCI_VENDOR_ID_INTEL) {
unsigned short id;
id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
dev_priv->pch_id = id;
if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {
dev_priv->pch_type = PCH_IBX;
DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
WARN_ON(!IS_GEN5(dev));
} else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
dev_priv->pch_type = PCH_CPT;
DRM_DEBUG_KMS("Found CougarPoint PCH\n");
WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
} else if (id == INTEL_PCH_PPT_DEVICE_ID_TYPE) {
/* PantherPoint is CPT compatible */
dev_priv->pch_type = PCH_CPT;
DRM_DEBUG_KMS("Found PatherPoint PCH\n");
WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
} else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
dev_priv->pch_type = PCH_LPT;
DRM_DEBUG_KMS("Found LynxPoint PCH\n");
WARN_ON(!IS_HASWELL(dev));
WARN_ON(IS_ULT(dev));
} else if (id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
dev_priv->pch_type = PCH_LPT;
DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
WARN_ON(!IS_HASWELL(dev));
WARN_ON(!IS_ULT(dev));
} else {
goto check_next;
}
break;
}
check_next:
pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, curr);
// pci_dev_put(curr);
}
if (!pch)
DRM_DEBUG_KMS("No PCH found?\n");
}
bool i915_semaphore_is_enabled(struct drm_device *dev)
{
if (INTEL_INFO(dev)->gen < 6)
return 0;
if (i915_semaphores >= 0)
return i915_semaphores;
#ifdef CONFIG_INTEL_IOMMU
/* Enable semaphores on SNB when IO remapping is off */
if (INTEL_INFO(dev)->gen == 6 && intel_iommu_gfx_mapped)
return false;
#endif
return 1;
}
#if 0
static int i915_drm_freeze(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_crtc *crtc;
/* ignore lid events during suspend */
mutex_lock(&dev_priv->modeset_restore_lock);
dev_priv->modeset_restore = MODESET_SUSPENDED;
mutex_unlock(&dev_priv->modeset_restore_lock);
/* We do a lot of poking in a lot of registers, make sure they work
* properly. */
hsw_disable_package_c8(dev_priv);
intel_set_power_well(dev, true);
drm_kms_helper_poll_disable(dev);
pci_save_state(dev->pdev);
/* If KMS is active, we do the leavevt stuff here */
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
int error;
mutex_lock(&dev->struct_mutex);
error = i915_gem_idle(dev);
mutex_unlock(&dev->struct_mutex);
if (error) {
dev_err(&dev->pdev->dev,
"GEM idle failed, resume might fail\n");
return error;
}
cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work);
drm_irq_uninstall(dev);
dev_priv->enable_hotplug_processing = false;
/*
* Disable CRTCs directly since we want to preserve sw state
* for _thaw.
*/
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
dev_priv->display.crtc_disable(crtc);
intel_modeset_suspend_hw(dev);
}
i915_save_state(dev);
intel_opregion_fini(dev);
console_lock();
intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED);
console_unlock();
return 0;
}
int i915_suspend(struct drm_device *dev, pm_message_t state)
{
int error;
if (!dev || !dev->dev_private) {
DRM_ERROR("dev: %p\n", dev);
DRM_ERROR("DRM not initialized, aborting suspend.\n");
return -ENODEV;
}
if (state.event == PM_EVENT_PRETHAW)
return 0;
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
error = i915_drm_freeze(dev);
if (error)
return error;
if (state.event == PM_EVENT_SUSPEND) {
/* Shut down the device */
pci_disable_device(dev->pdev);
pci_set_power_state(dev->pdev, PCI_D3hot);
}
return 0;
}
void intel_console_resume(struct work_struct *work)
{
struct drm_i915_private *dev_priv =
container_of(work, struct drm_i915_private,
console_resume_work);
struct drm_device *dev = dev_priv->dev;
console_lock();
intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING);
console_unlock();
}
static void intel_resume_hotplug(struct drm_device *dev)
{
struct drm_mode_config *mode_config = &dev->mode_config;
struct intel_encoder *encoder;
mutex_lock(&mode_config->mutex);
DRM_DEBUG_KMS("running encoder hotplug functions\n");
list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
if (encoder->hot_plug)
encoder->hot_plug(encoder);
mutex_unlock(&mode_config->mutex);
/* Just fire off a uevent and let userspace tell us what to do */
drm_helper_hpd_irq_event(dev);
}
static int __i915_drm_thaw(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int error = 0;
i915_restore_state(dev);
intel_opregion_setup(dev);
/* KMS EnterVT equivalent */
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
intel_init_pch_refclk(dev);
mutex_lock(&dev->struct_mutex);
error = i915_gem_init_hw(dev);
mutex_unlock(&dev->struct_mutex);
/* We need working interrupts for modeset enabling ... */
drm_irq_install(dev);
intel_modeset_init_hw(dev);
drm_modeset_lock_all(dev);
intel_modeset_setup_hw_state(dev, true);
drm_modeset_unlock_all(dev);
/*
* ... but also need to make sure that hotplug processing
* doesn't cause havoc. Like in the driver load code we don't
* bother with the tiny race here where we might loose hotplug
* notifications.
* */
intel_hpd_init(dev);
dev_priv->enable_hotplug_processing = true;
/* Config may have changed between suspend and resume */
intel_resume_hotplug(dev);
}
intel_opregion_init(dev);
/*
* The console lock can be pretty contented on resume due
* to all the printk activity. Try to keep it out of the hot
* path of resume if possible.
*/
if (console_trylock()) {
intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING);
console_unlock();
} else {
schedule_work(&dev_priv->console_resume_work);
}
/* Undo what we did at i915_drm_freeze so the refcount goes back to the
* expected level. */
hsw_enable_package_c8(dev_priv);
mutex_lock(&dev_priv->modeset_restore_lock);
dev_priv->modeset_restore = MODESET_DONE;
mutex_unlock(&dev_priv->modeset_restore_lock);
return error;
}
static int i915_drm_thaw(struct drm_device *dev)
{
int error = 0;
intel_uncore_sanitize(dev);
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
mutex_lock(&dev->struct_mutex);
i915_gem_restore_gtt_mappings(dev);
mutex_unlock(&dev->struct_mutex);
}
__i915_drm_thaw(dev);
return error;
}
int i915_resume(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int ret;
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
if (pci_enable_device(dev->pdev))
return -EIO;
pci_set_master(dev->pdev);
intel_uncore_sanitize(dev);
/*
* Platforms with opregion should have sane BIOS, older ones (gen3 and
* earlier) need this since the BIOS might clear all our scratch PTEs.
*/
if (drm_core_check_feature(dev, DRIVER_MODESET) &&
!dev_priv->opregion.header) {
mutex_lock(&dev->struct_mutex);
i915_gem_restore_gtt_mappings(dev);
mutex_unlock(&dev->struct_mutex);
}
ret = __i915_drm_thaw(dev);
if (ret)
return ret;
drm_kms_helper_poll_enable(dev);
return 0;
}
/**
* i915_reset - reset chip after a hang
* @dev: drm device to reset
*
* Reset the chip. Useful if a hang is detected. Returns zero on successful
* reset or otherwise an error code.
*
* Procedure is fairly simple:
* - reset the chip using the reset reg
* - re-init context state
* - re-init hardware status page
* - re-init ring buffer
* - re-init interrupt state
* - re-init display
*/
int i915_reset(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
bool simulated;
int ret;
if (!i915_try_reset)
return 0;
mutex_lock(&dev->struct_mutex);
i915_gem_reset(dev);
simulated = dev_priv->gpu_error.stop_rings != 0;
if (!simulated && get_seconds() - dev_priv->gpu_error.last_reset < 5) {
DRM_ERROR("GPU hanging too fast, declaring wedged!\n");
ret = -ENODEV;
} else {
ret = intel_gpu_reset(dev);
/* Also reset the gpu hangman. */
if (simulated) {
DRM_INFO("Simulated gpu hang, resetting stop_rings\n");
dev_priv->gpu_error.stop_rings = 0;
if (ret == -ENODEV) {
DRM_ERROR("Reset not implemented, but ignoring "
"error for simulated gpu hangs\n");
ret = 0;
}
} else
dev_priv->gpu_error.last_reset = get_seconds();
}
if (ret) {
DRM_ERROR("Failed to reset chip.\n");
mutex_unlock(&dev->struct_mutex);
return ret;
}
/* Ok, now get things going again... */
/*
* Everything depends on having the GTT running, so we need to start
* there. Fortunately we don't need to do this unless we reset the
* chip at a PCI level.
*
* Next we need to restore the context, but we don't use those
* yet either...
*
* Ring buffer needs to be re-initialized in the KMS case, or if X
* was running at the time of the reset (i.e. we weren't VT
* switched away).
*/
if (drm_core_check_feature(dev, DRIVER_MODESET) ||
!dev_priv->ums.mm_suspended) {
struct intel_ring_buffer *ring;
int i;
dev_priv->ums.mm_suspended = 0;
i915_gem_init_swizzling(dev);
for_each_ring(ring, dev_priv, i)
ring->init(ring);
i915_gem_context_init(dev);
if (dev_priv->mm.aliasing_ppgtt) {
ret = dev_priv->mm.aliasing_ppgtt->enable(dev);
if (ret)
i915_gem_cleanup_aliasing_ppgtt(dev);
}
/*
* It would make sense to re-init all the other hw state, at
* least the rps/rc6/emon init done within modeset_init_hw. For
* some unknown reason, this blows up my ilk, so don't.
*/
mutex_unlock(&dev->struct_mutex);
drm_irq_uninstall(dev);
drm_irq_install(dev);
intel_hpd_init(dev);
} else {
mutex_unlock(&dev->struct_mutex);
}
return 0;
}
static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct intel_device_info *intel_info =
(struct intel_device_info *) ent->driver_data;
/* Only bind to function 0 of the device. Early generations
* used function 1 as a placeholder for multi-head. This causes
* us confusion instead, especially on the systems where both
* functions have the same PCI-ID!
*/
if (PCI_FUNC(pdev->devfn))
return -ENODEV;
/* We've managed to ship a kms-enabled ddx that shipped with an XvMC
* implementation for gen3 (and only gen3) that used legacy drm maps
* (gasp!) to share buffers between X and the client. Hence we need to
* keep around the fake agp stuff for gen3, even when kms is enabled. */
if (intel_info->gen != 3) {
driver.driver_features &=
~(DRIVER_USE_AGP | DRIVER_REQUIRE_AGP);
} else if (!intel_agp_enabled) {
DRM_ERROR("drm/i915 can't work without intel_agp module!\n");
return -ENODEV;
}
return drm_get_pci_dev(pdev, ent, &driver);
}
static void
i915_pci_remove(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
drm_put_dev(dev);
}
static int i915_pm_suspend(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct drm_device *drm_dev = pci_get_drvdata(pdev);
int error;
if (!drm_dev || !drm_dev->dev_private) {
dev_err(dev, "DRM not initialized, aborting suspend.\n");
return -ENODEV;
}
if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
error = i915_drm_freeze(drm_dev);
if (error)
return error;
pci_disable_device(pdev);
pci_set_power_state(pdev, PCI_D3hot);
return 0;
}
static int i915_pm_resume(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct drm_device *drm_dev = pci_get_drvdata(pdev);
return i915_resume(drm_dev);
}
static int i915_pm_freeze(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct drm_device *drm_dev = pci_get_drvdata(pdev);
if (!drm_dev || !drm_dev->dev_private) {
dev_err(dev, "DRM not initialized, aborting suspend.\n");
return -ENODEV;
}
return i915_drm_freeze(drm_dev);
}
static int i915_pm_thaw(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct drm_device *drm_dev = pci_get_drvdata(pdev);
return i915_drm_thaw(drm_dev);
}
static int i915_pm_poweroff(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct drm_device *drm_dev = pci_get_drvdata(pdev);
return i915_drm_freeze(drm_dev);
}
#endif
static struct drm_driver driver = {
/* Don't use MTRRs here; the Xserver or userspace app should
* deal with them for Intel hardware.
*/
.driver_features =
DRIVER_USE_AGP | DRIVER_REQUIRE_AGP |
DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME |
DRIVER_RENDER,
.load = i915_driver_load,
// .unload = i915_driver_unload,
.open = i915_driver_open,
// .lastclose = i915_driver_lastclose,
// .preclose = i915_driver_preclose,
// .postclose = i915_driver_postclose,
/* Used in place of i915_pm_ops for non-DRIVER_MODESET */
// .suspend = i915_suspend,
// .resume = i915_resume,
// .device_is_agp = i915_driver_device_is_agp,
// .master_create = i915_master_create,
// .master_destroy = i915_master_destroy,
#if defined(CONFIG_DEBUG_FS)
.debugfs_init = i915_debugfs_init,
.debugfs_cleanup = i915_debugfs_cleanup,
#endif
.gem_init_object = i915_gem_init_object,
.gem_free_object = i915_gem_free_object,
// .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
// .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
// .gem_prime_export = i915_gem_prime_export,
// .gem_prime_import = i915_gem_prime_import,
// .dumb_create = i915_gem_dumb_create,
// .dumb_map_offset = i915_gem_mmap_gtt,
// .dumb_destroy = i915_gem_dumb_destroy,
// .ioctls = i915_ioctls,
// .fops = &i915_driver_fops,
// .name = DRIVER_NAME,
// .desc = DRIVER_DESC,
// .date = DRIVER_DATE,
// .major = DRIVER_MAJOR,
// .minor = DRIVER_MINOR,
// .patchlevel = DRIVER_PATCHLEVEL,
};
int i915_init(void)
{
static pci_dev_t device;
const struct pci_device_id *ent;
int err;
ent = find_pci_device(&device, pciidlist);
if( unlikely(ent == NULL) )
{
dbgprintf("device not found\n");
return -ENODEV;
};
drm_core_init();
DRM_INFO("device %x:%x\n", device.pci_dev.vendor,
device.pci_dev.device);
/*
if (intel_info->gen != 3) {
} else if (init_agp() != 0) {
DRM_ERROR("drm/i915 can't work without intel_agp module!\n");
return -ENODEV;
}
*/
err = drm_get_pci_dev(&device.pci_dev, ent, &driver);
return err;
}
/* We give fast paths for the really cool registers */
#define NEEDS_FORCE_WAKE(dev_priv, reg) \
((HAS_FORCE_WAKE((dev_priv)->dev)) && \
((reg) < 0x40000) && \
((reg) != FORCEWAKE))
static bool IS_DISPLAYREG(u32 reg)
{
/*
* This should make it easier to transition modules over to the
* new register block scheme, since we can do it incrementally.
*/
if (reg >= VLV_DISPLAY_BASE)
return false;
if (reg >= RENDER_RING_BASE &&
reg < RENDER_RING_BASE + 0xff)
return false;
if (reg >= GEN6_BSD_RING_BASE &&
reg < GEN6_BSD_RING_BASE + 0xff)
return false;
if (reg >= BLT_RING_BASE &&
reg < BLT_RING_BASE + 0xff)
return false;
if (reg == PGTBL_ER)
return false;
if (reg >= IPEIR_I965 &&
reg < HWSTAM)
return false;
if (reg == MI_MODE)
return false;
if (reg == GFX_MODE_GEN7)
return false;
if (reg == RENDER_HWS_PGA_GEN7 ||
reg == BSD_HWS_PGA_GEN7 ||
reg == BLT_HWS_PGA_GEN7)
return false;
if (reg == GEN6_BSD_SLEEP_PSMI_CONTROL ||
reg == GEN6_BSD_RNCID)
return false;
if (reg == GEN6_BLITTER_ECOSKPD)
return false;
if (reg >= 0x4000c &&
reg <= 0x4002c)
return false;
if (reg >= 0x4f000 &&
reg <= 0x4f08f)
return false;
if (reg >= 0x4f100 &&
reg <= 0x4f11f)
return false;
if (reg >= VLV_MASTER_IER &&
reg <= GEN6_PMIER)
return false;
if (reg >= FENCE_REG_SANDYBRIDGE_0 &&
reg < (FENCE_REG_SANDYBRIDGE_0 + (16*8)))
return false;
if (reg >= VLV_IIR_RW &&
reg <= VLV_ISR)
return false;
if (reg == FORCEWAKE_VLV ||
reg == FORCEWAKE_ACK_VLV)
return false;
if (reg == GEN6_GDRST)
return false;
switch (reg) {
case _3D_CHICKEN3:
case IVB_CHICKEN3:
case GEN7_COMMON_SLICE_CHICKEN1:
case GEN7_L3CNTLREG1:
case GEN7_L3_CHICKEN_MODE_REGISTER:
case GEN7_ROW_CHICKEN2:
case GEN7_L3SQCREG4:
case GEN7_SQ_CHICKEN_MBCUNIT_CONFIG:
case GEN7_HALF_SLICE_CHICKEN1:
case GEN6_MBCTL:
case GEN6_UCGCTL2:
return false;
default:
break;
}
return true;
}
/* We give fast paths for the really cool registers */
#define NEEDS_FORCE_WAKE(dev_priv, reg) \
((HAS_FORCE_WAKE((dev_priv)->dev)) && \
((reg) < 0x40000) && \
((reg) != FORCEWAKE))
static void
ilk_dummy_write(struct drm_i915_private *dev_priv)
{
/* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
* the chip from rc6 before touching it for real. MI_MODE is masked,
* hence harmless to write 0 into. */
I915_WRITE_NOTRACE(MI_MODE, 0);
}
static void
hsw_unclaimed_reg_clear(struct drm_i915_private *dev_priv, u32 reg)
{
if (HAS_FPGA_DBG_UNCLAIMED(dev_priv->dev) &&
(I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
DRM_ERROR("Unknown unclaimed register before writing to %x\n",
reg);
I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
}
}
static void
hsw_unclaimed_reg_check(struct drm_i915_private *dev_priv, u32 reg)
{
if (HAS_FPGA_DBG_UNCLAIMED(dev_priv->dev) &&
(I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
DRM_ERROR("Unclaimed write to %x\n", reg);
I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
}
}