| Current Path : /sys/dev/drm2/i915/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/dev/drm2/i915/i915_drv.c |
/* i915_drv.c -- Intel i915 driver -*- linux-c -*-
* Created: Wed Feb 14 17:10:04 2001 by gareth@valinux.com
*/
/*-
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* 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
* VA LINUX SYSTEMS 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.
*
* Authors:
* Gareth Hughes <gareth@valinux.com>
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/drm2/i915/i915_drv.c 241093 2012-10-01 10:52:10Z mav $");
#include <dev/drm2/drmP.h>
#include <dev/drm2/drm.h>
#include <dev/drm2/drm_mm.h>
#include <dev/drm2/i915/i915_drm.h>
#include <dev/drm2/i915/i915_drv.h>
#include <dev/drm2/drm_pciids.h>
#include <dev/drm2/i915/intel_drv.h>
/* drv_PCI_IDs comes from drm_pciids.h, generated from drm_pciids.txt. */
static drm_pci_id_list_t i915_pciidlist[] = {
i915_PCI_IDS
};
static const struct intel_device_info intel_i830_info = {
.gen = 2, .is_mobile = 1, .cursor_needs_physical = 1,
.has_overlay = 1, .overlay_needs_physical = 1,
};
static const struct intel_device_info intel_845g_info = {
.gen = 2,
.has_overlay = 1, .overlay_needs_physical = 1,
};
static const struct intel_device_info intel_i85x_info = {
.gen = 2, .is_i85x = 1, .is_mobile = 1,
.cursor_needs_physical = 1,
.has_overlay = 1, .overlay_needs_physical = 1,
};
static const struct intel_device_info intel_i865g_info = {
.gen = 2,
.has_overlay = 1, .overlay_needs_physical = 1,
};
static const struct intel_device_info intel_i915g_info = {
.gen = 3, .is_i915g = 1, .cursor_needs_physical = 1,
.has_overlay = 1, .overlay_needs_physical = 1,
};
static const struct intel_device_info intel_i915gm_info = {
.gen = 3, .is_mobile = 1,
.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,
.has_overlay = 1, .overlay_needs_physical = 1,
};
static const struct intel_device_info intel_i945gm_info = {
.gen = 3, .is_i945gm = 1, .is_mobile = 1,
.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,
.has_hotplug = 1,
.has_overlay = 1,
};
static const struct intel_device_info intel_i965gm_info = {
.gen = 4, .is_crestline = 1,
.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,
.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,
.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,
.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,
.need_gfx_hws = 1, .has_hotplug = 1,
.has_overlay = 1,
};
static const struct intel_device_info intel_ironlake_d_info = {
.gen = 5,
.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,
.need_gfx_hws = 1, .has_hotplug = 1,
.has_fbc = 0, /* disabled due to buggy hardware */
.has_bsd_ring = 1,
};
static const struct intel_device_info intel_sandybridge_d_info = {
.gen = 6,
.need_gfx_hws = 1, .has_hotplug = 1,
.has_bsd_ring = 1,
.has_blt_ring = 1,
.has_llc = 1,
};
static const struct intel_device_info intel_sandybridge_m_info = {
.gen = 6, .is_mobile = 1,
.need_gfx_hws = 1, .has_hotplug = 1,
.has_fbc = 1,
.has_bsd_ring = 1,
.has_blt_ring = 1,
.has_llc = 1,
};
static const struct intel_device_info intel_ivybridge_d_info = {
.is_ivybridge = 1, .gen = 7,
.need_gfx_hws = 1, .has_hotplug = 1,
.has_bsd_ring = 1,
.has_blt_ring = 1,
.has_llc = 1,
};
static const struct intel_device_info intel_ivybridge_m_info = {
.is_ivybridge = 1, .gen = 7, .is_mobile = 1,
.need_gfx_hws = 1, .has_hotplug = 1,
.has_fbc = 0, /* FBC is not enabled on Ivybridge mobile yet */
.has_bsd_ring = 1,
.has_blt_ring = 1,
.has_llc = 1,
};
#define INTEL_VGA_DEVICE(id, info_) { \
.device = id, \
.info = info_, \
}
static const struct intel_gfx_device_id {
int device;
const struct intel_device_info *info;
} pciidlist[] = { /* aka */
INTEL_VGA_DEVICE(0x3577, &intel_i830_info),
INTEL_VGA_DEVICE(0x2562, &intel_845g_info),
INTEL_VGA_DEVICE(0x3582, &intel_i85x_info),
INTEL_VGA_DEVICE(0x358e, &intel_i85x_info),
INTEL_VGA_DEVICE(0x2572, &intel_i865g_info),
INTEL_VGA_DEVICE(0x2582, &intel_i915g_info),
INTEL_VGA_DEVICE(0x258a, &intel_i915g_info),
INTEL_VGA_DEVICE(0x2592, &intel_i915gm_info),
INTEL_VGA_DEVICE(0x2772, &intel_i945g_info),
INTEL_VGA_DEVICE(0x27a2, &intel_i945gm_info),
INTEL_VGA_DEVICE(0x27ae, &intel_i945gm_info),
INTEL_VGA_DEVICE(0x2972, &intel_i965g_info),
INTEL_VGA_DEVICE(0x2982, &intel_i965g_info),
INTEL_VGA_DEVICE(0x2992, &intel_i965g_info),
INTEL_VGA_DEVICE(0x29a2, &intel_i965g_info),
INTEL_VGA_DEVICE(0x29b2, &intel_g33_info),
INTEL_VGA_DEVICE(0x29c2, &intel_g33_info),
INTEL_VGA_DEVICE(0x29d2, &intel_g33_info),
INTEL_VGA_DEVICE(0x2a02, &intel_i965gm_info),
INTEL_VGA_DEVICE(0x2a12, &intel_i965gm_info),
INTEL_VGA_DEVICE(0x2a42, &intel_gm45_info),
INTEL_VGA_DEVICE(0x2e02, &intel_g45_info),
INTEL_VGA_DEVICE(0x2e12, &intel_g45_info),
INTEL_VGA_DEVICE(0x2e22, &intel_g45_info),
INTEL_VGA_DEVICE(0x2e32, &intel_g45_info),
INTEL_VGA_DEVICE(0x2e42, &intel_g45_info),
INTEL_VGA_DEVICE(0x2e92, &intel_g45_info),
INTEL_VGA_DEVICE(0xa001, &intel_pineview_info),
INTEL_VGA_DEVICE(0xa011, &intel_pineview_info),
INTEL_VGA_DEVICE(0x0042, &intel_ironlake_d_info),
INTEL_VGA_DEVICE(0x0046, &intel_ironlake_m_info),
INTEL_VGA_DEVICE(0x0102, &intel_sandybridge_d_info),
INTEL_VGA_DEVICE(0x0112, &intel_sandybridge_d_info),
INTEL_VGA_DEVICE(0x0122, &intel_sandybridge_d_info),
INTEL_VGA_DEVICE(0x0106, &intel_sandybridge_m_info),
INTEL_VGA_DEVICE(0x0116, &intel_sandybridge_m_info),
INTEL_VGA_DEVICE(0x0126, &intel_sandybridge_m_info),
INTEL_VGA_DEVICE(0x010A, &intel_sandybridge_d_info),
INTEL_VGA_DEVICE(0x0156, &intel_ivybridge_m_info), /* GT1 mobile */
INTEL_VGA_DEVICE(0x0166, &intel_ivybridge_m_info), /* GT2 mobile */
INTEL_VGA_DEVICE(0x0152, &intel_ivybridge_d_info), /* GT1 desktop */
INTEL_VGA_DEVICE(0x0162, &intel_ivybridge_d_info), /* GT2 desktop */
INTEL_VGA_DEVICE(0x015a, &intel_ivybridge_d_info), /* GT1 server */
INTEL_VGA_DEVICE(0x016a, &intel_ivybridge_d_info), /* GT2 server */
{0, 0}
};
static int i915_drm_freeze(struct drm_device *dev)
{
struct drm_i915_private *dev_priv;
int error;
dev_priv = dev->dev_private;
drm_kms_helper_poll_disable(dev);
#if 0
pci_save_state(dev->pdev);
#endif
DRM_LOCK(dev);
/* If KMS is active, we do the leavevt stuff here */
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
error = -i915_gem_idle(dev);
if (error) {
DRM_UNLOCK(dev);
device_printf(dev->device,
"GEM idle failed, resume might fail\n");
return (error);
}
drm_irq_uninstall(dev);
}
i915_save_state(dev);
intel_opregion_fini(dev);
/* Modeset on resume, not lid events */
dev_priv->modeset_on_lid = 0;
DRM_UNLOCK(dev);
return 0;
}
static int
i915_suspend(device_t kdev)
{
struct drm_device *dev;
int error;
dev = device_get_softc(kdev);
if (dev == NULL || dev->dev_private == NULL) {
DRM_ERROR("DRM not initialized, aborting suspend.\n");
return -ENODEV;
}
DRM_DEBUG_KMS("starting suspend\n");
error = i915_drm_freeze(dev);
if (error)
return (error);
error = bus_generic_suspend(kdev);
DRM_DEBUG_KMS("finished suspend %d\n", error);
return (error);
}
static int i915_drm_thaw(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int error = 0;
DRM_LOCK(dev);
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
i915_gem_restore_gtt_mappings(dev);
}
i915_restore_state(dev);
intel_opregion_setup(dev);
/* KMS EnterVT equivalent */
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
dev_priv->mm.suspended = 0;
error = i915_gem_init_hw(dev);
if (HAS_PCH_SPLIT(dev))
ironlake_init_pch_refclk(dev);
DRM_UNLOCK(dev);
sx_xlock(&dev->mode_config.mutex);
drm_mode_config_reset(dev);
sx_xunlock(&dev->mode_config.mutex);
drm_irq_install(dev);
sx_xlock(&dev->mode_config.mutex);
/* Resume the modeset for every activated CRTC */
drm_helper_resume_force_mode(dev);
sx_xunlock(&dev->mode_config.mutex);
if (IS_IRONLAKE_M(dev))
ironlake_enable_rc6(dev);
DRM_LOCK(dev);
}
intel_opregion_init(dev);
dev_priv->modeset_on_lid = 0;
DRM_UNLOCK(dev);
return error;
}
static int
i915_resume(device_t kdev)
{
struct drm_device *dev;
int ret;
dev = device_get_softc(kdev);
DRM_DEBUG_KMS("starting resume\n");
#if 0
if (pci_enable_device(dev->pdev))
return -EIO;
pci_set_master(dev->pdev);
#endif
ret = -i915_drm_thaw(dev);
if (ret != 0)
return (ret);
drm_kms_helper_poll_enable(dev);
ret = bus_generic_resume(kdev);
DRM_DEBUG_KMS("finished resume %d\n", ret);
return (ret);
}
static int
i915_probe(device_t kdev)
{
return drm_probe(kdev, i915_pciidlist);
}
int i915_modeset;
static int
i915_attach(device_t kdev)
{
struct drm_device *dev;
dev = device_get_softc(kdev);
if (i915_modeset == 1)
i915_driver_info.driver_features |= DRIVER_MODESET;
dev->driver = &i915_driver_info;
return (drm_attach(kdev, i915_pciidlist));
}
const struct intel_device_info *
i915_get_device_id(int device)
{
const struct intel_gfx_device_id *did;
for (did = &pciidlist[0]; did->device != 0; did++) {
if (did->device != device)
continue;
return (did->info);
}
return (NULL);
}
static device_method_t i915_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, i915_probe),
DEVMETHOD(device_attach, i915_attach),
DEVMETHOD(device_suspend, i915_suspend),
DEVMETHOD(device_resume, i915_resume),
DEVMETHOD(device_detach, drm_detach),
DEVMETHOD_END
};
static driver_t i915_driver = {
"drmn",
i915_methods,
sizeof(struct drm_device)
};
extern devclass_t drm_devclass;
DRIVER_MODULE_ORDERED(i915kms, vgapci, i915_driver, drm_devclass, 0, 0,
SI_ORDER_ANY);
MODULE_DEPEND(i915kms, drmn, 1, 1, 1);
MODULE_DEPEND(i915kms, agp, 1, 1, 1);
MODULE_DEPEND(i915kms, iicbus, 1, 1, 1);
MODULE_DEPEND(i915kms, iic, 1, 1, 1);
MODULE_DEPEND(i915kms, iicbb, 1, 1, 1);
int intel_iommu_enabled = 0;
TUNABLE_INT("drm.i915.intel_iommu_enabled", &intel_iommu_enabled);
int i915_semaphores = -1;
TUNABLE_INT("drm.i915.semaphores", &i915_semaphores);
static int i915_try_reset = 1;
TUNABLE_INT("drm.i915.try_reset", &i915_try_reset);
unsigned int i915_lvds_downclock = 0;
TUNABLE_INT("drm.i915.lvds_downclock", &i915_lvds_downclock);
int i915_vbt_sdvo_panel_type = -1;
TUNABLE_INT("drm.i915.vbt_sdvo_panel_type", &i915_vbt_sdvo_panel_type);
unsigned int i915_powersave = 1;
TUNABLE_INT("drm.i915.powersave", &i915_powersave);
int i915_enable_fbc = 0;
TUNABLE_INT("drm.i915.enable_fbc", &i915_enable_fbc);
int i915_enable_rc6 = 0;
TUNABLE_INT("drm.i915.enable_rc6", &i915_enable_rc6);
int i915_panel_use_ssc = -1;
TUNABLE_INT("drm.i915.panel_use_ssc", &i915_panel_use_ssc);
int i915_panel_ignore_lid = 0;
TUNABLE_INT("drm.i915.panel_ignore_lid", &i915_panel_ignore_lid);
int i915_modeset = 1;
TUNABLE_INT("drm.i915.modeset", &i915_modeset);
int i915_enable_ppgtt = -1;
TUNABLE_INT("drm.i915.enable_ppgtt", &i915_enable_ppgtt);
int i915_enable_hangcheck = 1;
TUNABLE_INT("drm.i915.enable_hangcheck", &i915_enable_hangcheck);
#define PCI_VENDOR_INTEL 0x8086
#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
void
intel_detect_pch(struct drm_device *dev)
{
struct drm_i915_private *dev_priv;
device_t pch;
uint32_t id;
dev_priv = dev->dev_private;
pch = pci_find_class(PCIC_BRIDGE, PCIS_BRIDGE_ISA);
if (pch != NULL && pci_get_vendor(pch) == PCI_VENDOR_INTEL) {
id = pci_get_device(pch) & INTEL_PCH_DEVICE_ID_MASK;
if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {
dev_priv->pch_type = PCH_IBX;
DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
} else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
dev_priv->pch_type = PCH_CPT;
DRM_DEBUG_KMS("Found CougarPoint PCH\n");
} 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");
} else
DRM_DEBUG_KMS("No PCH detected\n");
} else
DRM_DEBUG_KMS("No Intel PCI-ISA bridge found\n");
}
void
__gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
{
int count;
count = 0;
while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_ACK) & 1))
DELAY(10);
I915_WRITE_NOTRACE(FORCEWAKE, 1);
POSTING_READ(FORCEWAKE);
count = 0;
while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_ACK) & 1) == 0)
DELAY(10);
}
void
__gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv)
{
int count;
count = 0;
while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_MT_ACK) & 1))
DELAY(10);
I915_WRITE_NOTRACE(FORCEWAKE_MT, (1<<16) | 1);
POSTING_READ(FORCEWAKE_MT);
count = 0;
while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_MT_ACK) & 1) == 0)
DELAY(10);
}
void
gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
{
mtx_lock(&dev_priv->gt_lock);
if (dev_priv->forcewake_count++ == 0)
dev_priv->display.force_wake_get(dev_priv);
mtx_unlock(&dev_priv->gt_lock);
}
static void
gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
{
u32 gtfifodbg;
gtfifodbg = I915_READ_NOTRACE(GTFIFODBG);
if ((gtfifodbg & GT_FIFO_CPU_ERROR_MASK) != 0) {
printf("MMIO read or write has been dropped %x\n", gtfifodbg);
I915_WRITE_NOTRACE(GTFIFODBG, GT_FIFO_CPU_ERROR_MASK);
}
}
void
__gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)
{
I915_WRITE_NOTRACE(FORCEWAKE, 0);
/* The below doubles as a POSTING_READ */
gen6_gt_check_fifodbg(dev_priv);
}
void
__gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv)
{
I915_WRITE_NOTRACE(FORCEWAKE_MT, (1<<16) | 0);
/* The below doubles as a POSTING_READ */
gen6_gt_check_fifodbg(dev_priv);
}
void
gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)
{
mtx_lock(&dev_priv->gt_lock);
if (--dev_priv->forcewake_count == 0)
dev_priv->display.force_wake_put(dev_priv);
mtx_unlock(&dev_priv->gt_lock);
}
int
__gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
{
int ret = 0;
if (dev_priv->gt_fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) {
int loop = 500;
u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
DELAY(10);
fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
}
if (loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES) {
printf("%s loop\n", __func__);
++ret;
}
dev_priv->gt_fifo_count = fifo;
}
dev_priv->gt_fifo_count--;
return (ret);
}
static int
i8xx_do_reset(struct drm_device *dev, u8 flags)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int onems;
if (IS_I85X(dev))
return -ENODEV;
onems = hz / 1000;
if (onems == 0)
onems = 1;
I915_WRITE(D_STATE, I915_READ(D_STATE) | DSTATE_GFX_RESET_I830);
POSTING_READ(D_STATE);
if (IS_I830(dev) || IS_845G(dev)) {
I915_WRITE(DEBUG_RESET_I830,
DEBUG_RESET_DISPLAY |
DEBUG_RESET_RENDER |
DEBUG_RESET_FULL);
POSTING_READ(DEBUG_RESET_I830);
pause("i8xxrst1", onems);
I915_WRITE(DEBUG_RESET_I830, 0);
POSTING_READ(DEBUG_RESET_I830);
}
pause("i8xxrst2", onems);
I915_WRITE(D_STATE, I915_READ(D_STATE) & ~DSTATE_GFX_RESET_I830);
POSTING_READ(D_STATE);
return 0;
}
static int
i965_reset_complete(struct drm_device *dev)
{
u8 gdrst;
gdrst = pci_read_config(dev->device, I965_GDRST, 1);
return (gdrst & 0x1);
}
static int
i965_do_reset(struct drm_device *dev, u8 flags)
{
u8 gdrst;
/*
* Set the domains we want to reset (GRDOM/bits 2 and 3) as
* well as the reset bit (GR/bit 0). Setting the GR bit
* triggers the reset; when done, the hardware will clear it.
*/
gdrst = pci_read_config(dev->device, I965_GDRST, 1);
pci_write_config(dev->device, I965_GDRST, gdrst | flags | 0x1, 1);
return (_intel_wait_for(dev, i965_reset_complete(dev), 500, 1,
"915rst"));
}
static int
ironlake_do_reset(struct drm_device *dev, u8 flags)
{
struct drm_i915_private *dev_priv;
u32 gdrst;
dev_priv = dev->dev_private;
gdrst = I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR);
I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR, gdrst | flags | 0x1);
return (_intel_wait_for(dev,
(I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) & 0x1) != 0,
500, 1, "915rst"));
}
static int
gen6_do_reset(struct drm_device *dev, u8 flags)
{
struct drm_i915_private *dev_priv;
int ret;
dev_priv = dev->dev_private;
/* Hold gt_lock across reset to prevent any register access
* with forcewake not set correctly
*/
mtx_lock(&dev_priv->gt_lock);
/* Reset the chip */
/* GEN6_GDRST is not in the gt power well, no need to check
* for fifo space for the write or forcewake the chip for
* the read
*/
I915_WRITE_NOTRACE(GEN6_GDRST, GEN6_GRDOM_FULL);
/* Spin waiting for the device to ack the reset request */
ret = _intel_wait_for(dev,
(I915_READ(GEN6_GDRST) & GEN6_GRDOM_FULL) == 0,
500, 1, "915rst");
/* If reset with a user forcewake, try to restore, otherwise turn it off */
if (dev_priv->forcewake_count)
dev_priv->display.force_wake_get(dev_priv);
else
dev_priv->display.force_wake_put(dev_priv);
/* Restore fifo count */
dev_priv->gt_fifo_count = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
mtx_unlock(&dev_priv->gt_lock);
return (ret);
}
int
i915_reset(struct drm_device *dev, u8 flags)
{
drm_i915_private_t *dev_priv = dev->dev_private;
/*
* We really should only reset the display subsystem if we actually
* need to
*/
bool need_display = true;
int ret;
if (!i915_try_reset)
return (0);
if (!sx_try_xlock(&dev->dev_struct_lock))
return (-EBUSY);
i915_gem_reset(dev);
ret = -ENODEV;
if (time_second - dev_priv->last_gpu_reset < 5) {
DRM_ERROR("GPU hanging too fast, declaring wedged!\n");
} else {
switch (INTEL_INFO(dev)->gen) {
case 7:
case 6:
ret = gen6_do_reset(dev, flags);
break;
case 5:
ret = ironlake_do_reset(dev, flags);
break;
case 4:
ret = i965_do_reset(dev, flags);
break;
case 2:
ret = i8xx_do_reset(dev, flags);
break;
}
}
dev_priv->last_gpu_reset = time_second;
if (ret) {
DRM_ERROR("Failed to reset chip.\n");
DRM_UNLOCK(dev);
return (ret);
}
if (drm_core_check_feature(dev, DRIVER_MODESET) ||
!dev_priv->mm.suspended) {
dev_priv->mm.suspended = 0;
i915_gem_init_swizzling(dev);
dev_priv->rings[RCS].init(&dev_priv->rings[RCS]);
if (HAS_BSD(dev))
dev_priv->rings[VCS].init(&dev_priv->rings[VCS]);
if (HAS_BLT(dev))
dev_priv->rings[BCS].init(&dev_priv->rings[BCS]);
i915_gem_init_ppgtt(dev);
drm_irq_uninstall(dev);
drm_mode_config_reset(dev);
DRM_UNLOCK(dev);
drm_irq_install(dev);
DRM_LOCK(dev);
}
DRM_UNLOCK(dev);
if (need_display) {
sx_xlock(&dev->mode_config.mutex);
drm_helper_resume_force_mode(dev);
sx_xunlock(&dev->mode_config.mutex);
}
return (0);
}
#define __i915_read(x, y) \
u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \
u##x val = 0; \
if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
mtx_lock(&dev_priv->gt_lock); \
if (dev_priv->forcewake_count == 0) \
dev_priv->display.force_wake_get(dev_priv); \
val = DRM_READ##y(dev_priv->mmio_map, reg); \
if (dev_priv->forcewake_count == 0) \
dev_priv->display.force_wake_put(dev_priv); \
mtx_unlock(&dev_priv->gt_lock); \
} else { \
val = DRM_READ##y(dev_priv->mmio_map, reg); \
} \
trace_i915_reg_rw(false, reg, val, sizeof(val)); \
return val; \
}
__i915_read(8, 8)
__i915_read(16, 16)
__i915_read(32, 32)
__i915_read(64, 64)
#undef __i915_read
#define __i915_write(x, y) \
void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \
u32 __fifo_ret = 0; \
trace_i915_reg_rw(true, reg, val, sizeof(val)); \
if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
__fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
} \
DRM_WRITE##y(dev_priv->mmio_map, reg, val); \
if (__predict_false(__fifo_ret)) { \
gen6_gt_check_fifodbg(dev_priv); \
} \
}
__i915_write(8, 8)
__i915_write(16, 16)
__i915_write(32, 32)
__i915_write(64, 64)
#undef __i915_write