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linux_dsm_epyc7002/drivers/gpu/drm/i915/i915_drv.c
Ville Syrjälä c457d9cf25 drm/i915: Make sure we have enough memory bandwidth on ICL 
ICL has so many planes that it can easily exceed the maximum
effective memory bandwidth of the system. We must therefore check
that we don't exceed that limit.

The algorithm is very magic number heavy and lacks sufficient
explanation for now. We also have no sane way to query the
memory clock and timings, so we must rely on a combination of
raw readout from the memory controller and hardcoded assumptions.
The memory controller values obviously change as the system
jumps between the different SAGV points, so we try to stabilize
it first by disabling SAGV for the duration of the readout.

The utilized bandwidth is tracked via a device wide atomic
private object. That is actually not robust because we can't
afford to enforce strict global ordering between the pipes.
Thus I think I'll need to change this to simply chop up the
available bandwidth between all the active pipes. Each pipe
can then do whatever it wants as long as it doesn't exceed
its budget. That scheme will also require that we assume that
any number of planes could be active at any time.

TODO: make it robust and deal with all the open questions

v2: Sleep longer after disabling SAGV
v3: Poll for the dclk to get raised (seen it take 250ms!)
    If the system has 2133MT/s memory then we pointlessly
    wait one full second :(
v4: Use the new pcode interface to get the qgv points rather
    that using hardcoded numbers
v5: Move the pcode stuff into intel_bw.c (Matt)
    s/intel_sagv_info/intel_qgv_info/
    Do the NV12/P010 as per spec for now (Matt)
    s/IS_ICELAKE/IS_GEN11/
v6: Ignore bandwidth limits if the pcode query fails

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Acked-by: Clint Taylor <Clinton.A.Taylor@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190524153614.32410-1-ville.syrjala@linux.intel.com
2019-05-27 20:51:48 +03:00

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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/acpi.h>
#include <linux/device.h>
#include <linux/oom.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/pnp.h>
#include <linux/slab.h>
#include <linux/vgaarb.h>
#include <linux/vga_switcheroo.h>
#include <linux/vt.h>
#include <acpi/video.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_irq.h>
#include <drm/drm_probe_helper.h>
#include <drm/i915_drm.h>
#include "gt/intel_gt_pm.h"
#include "gt/intel_reset.h"
#include "gt/intel_workarounds.h"
#include "i915_debugfs.h"
#include "i915_drv.h"
#include "i915_irq.h"
#include "i915_pmu.h"
#include "i915_query.h"
#include "i915_trace.h"
#include "i915_vgpu.h"
#include "intel_acpi.h"
#include "intel_audio.h"
#include "intel_bw.h"
#include "intel_cdclk.h"
#include "intel_csr.h"
#include "intel_dp.h"
#include "intel_drv.h"
#include "intel_fbdev.h"
#include "intel_gmbus.h"
#include "intel_hotplug.h"
#include "intel_overlay.h"
#include "intel_pipe_crc.h"
#include "intel_pm.h"
#include "intel_sprite.h"
#include "intel_uc.h"
static struct drm_driver driver;
#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
static unsigned int i915_load_fail_count;
bool __i915_inject_load_failure(const char *func, int line)
{
if (i915_load_fail_count >= i915_modparams.inject_load_failure)
return false;
if (++i915_load_fail_count == i915_modparams.inject_load_failure) {
DRM_INFO("Injecting failure at checkpoint %u [%s:%d]\n",
i915_modparams.inject_load_failure, func, line);
i915_modparams.inject_load_failure = 0;
return true;
}
return false;
}
bool i915_error_injected(void)
{
return i915_load_fail_count && !i915_modparams.inject_load_failure;
}
#endif
#define FDO_BUG_URL "https://bugs.freedesktop.org/enter_bug.cgi?product=DRI"
#define FDO_BUG_MSG "Please file a bug at " FDO_BUG_URL " against DRM/Intel " \
"providing the dmesg log by booting with drm.debug=0xf"
void
__i915_printk(struct drm_i915_private *dev_priv, const char *level,
const char *fmt, ...)
{
static bool shown_bug_once;
struct device *kdev = dev_priv->drm.dev;
bool is_error = level[1] <= KERN_ERR[1];
bool is_debug = level[1] == KERN_DEBUG[1];
struct va_format vaf;
va_list args;
if (is_debug && !(drm_debug & DRM_UT_DRIVER))
return;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
if (is_error)
dev_printk(level, kdev, "%pV", &vaf);
else
dev_printk(level, kdev, "[" DRM_NAME ":%ps] %pV",
__builtin_return_address(0), &vaf);
va_end(args);
if (is_error && !shown_bug_once) {
/*
* Ask the user to file a bug report for the error, except
* if they may have caused the bug by fiddling with unsafe
* module parameters.
*/
if (!test_taint(TAINT_USER))
dev_notice(kdev, "%s", FDO_BUG_MSG);
shown_bug_once = true;
}
}
/* Map PCH device id to PCH type, or PCH_NONE if unknown. */
static enum intel_pch
intel_pch_type(const struct drm_i915_private *dev_priv, unsigned short id)
{
switch (id) {
case INTEL_PCH_IBX_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
WARN_ON(!IS_GEN(dev_priv, 5));
return PCH_IBX;
case INTEL_PCH_CPT_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found CougarPoint PCH\n");
WARN_ON(!IS_GEN(dev_priv, 6) && !IS_IVYBRIDGE(dev_priv));
return PCH_CPT;
case INTEL_PCH_PPT_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found PantherPoint PCH\n");
WARN_ON(!IS_GEN(dev_priv, 6) && !IS_IVYBRIDGE(dev_priv));
/* PantherPoint is CPT compatible */
return PCH_CPT;
case INTEL_PCH_LPT_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found LynxPoint PCH\n");
WARN_ON(!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
WARN_ON(IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv));
return PCH_LPT;
case INTEL_PCH_LPT_LP_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
WARN_ON(!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
WARN_ON(!IS_HSW_ULT(dev_priv) && !IS_BDW_ULT(dev_priv));
return PCH_LPT;
case INTEL_PCH_WPT_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found WildcatPoint PCH\n");
WARN_ON(!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
WARN_ON(IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv));
/* WildcatPoint is LPT compatible */
return PCH_LPT;
case INTEL_PCH_WPT_LP_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found WildcatPoint LP PCH\n");
WARN_ON(!IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
WARN_ON(!IS_HSW_ULT(dev_priv) && !IS_BDW_ULT(dev_priv));
/* WildcatPoint is LPT compatible */
return PCH_LPT;
case INTEL_PCH_SPT_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found SunrisePoint PCH\n");
WARN_ON(!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv));
return PCH_SPT;
case INTEL_PCH_SPT_LP_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found SunrisePoint LP PCH\n");
WARN_ON(!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv));
return PCH_SPT;
case INTEL_PCH_KBP_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found Kaby Lake PCH (KBP)\n");
WARN_ON(!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv) &&
!IS_COFFEELAKE(dev_priv));
/* KBP is SPT compatible */
return PCH_SPT;
case INTEL_PCH_CNP_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found Cannon Lake PCH (CNP)\n");
WARN_ON(!IS_CANNONLAKE(dev_priv) && !IS_COFFEELAKE(dev_priv));
return PCH_CNP;
case INTEL_PCH_CNP_LP_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found Cannon Lake LP PCH (CNP-LP)\n");
WARN_ON(!IS_CANNONLAKE(dev_priv) && !IS_COFFEELAKE(dev_priv));
return PCH_CNP;
case INTEL_PCH_CMP_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found Comet Lake PCH (CMP)\n");
WARN_ON(!IS_COFFEELAKE(dev_priv));
/* CometPoint is CNP Compatible */
return PCH_CNP;
case INTEL_PCH_ICP_DEVICE_ID_TYPE:
DRM_DEBUG_KMS("Found Ice Lake PCH\n");
WARN_ON(!IS_ICELAKE(dev_priv));
return PCH_ICP;
default:
return PCH_NONE;
}
}
static bool intel_is_virt_pch(unsigned short id,
unsigned short svendor, unsigned short sdevice)
{
return (id == INTEL_PCH_P2X_DEVICE_ID_TYPE ||
id == INTEL_PCH_P3X_DEVICE_ID_TYPE ||
(id == INTEL_PCH_QEMU_DEVICE_ID_TYPE &&
svendor == PCI_SUBVENDOR_ID_REDHAT_QUMRANET &&
sdevice == PCI_SUBDEVICE_ID_QEMU));
}
static unsigned short
intel_virt_detect_pch(const struct drm_i915_private *dev_priv)
{
unsigned short id = 0;
/*
* In a virtualized passthrough environment we can be in a
* setup where the ISA bridge is not able to be passed through.
* In this case, a south bridge can be emulated and we have to
* make an educated guess as to which PCH is really there.
*/
if (IS_ICELAKE(dev_priv))
id = INTEL_PCH_ICP_DEVICE_ID_TYPE;
else if (IS_CANNONLAKE(dev_priv) || IS_COFFEELAKE(dev_priv))
id = INTEL_PCH_CNP_DEVICE_ID_TYPE;
else if (IS_KABYLAKE(dev_priv) || IS_SKYLAKE(dev_priv))
id = INTEL_PCH_SPT_DEVICE_ID_TYPE;
else if (IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv))
id = INTEL_PCH_LPT_LP_DEVICE_ID_TYPE;
else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
id = INTEL_PCH_LPT_DEVICE_ID_TYPE;
else if (IS_GEN(dev_priv, 6) || IS_IVYBRIDGE(dev_priv))
id = INTEL_PCH_CPT_DEVICE_ID_TYPE;
else if (IS_GEN(dev_priv, 5))
id = INTEL_PCH_IBX_DEVICE_ID_TYPE;
if (id)
DRM_DEBUG_KMS("Assuming PCH ID %04x\n", id);
else
DRM_DEBUG_KMS("Assuming no PCH\n");
return id;
}
static void intel_detect_pch(struct drm_i915_private *dev_priv)
{
struct pci_dev *pch = NULL;
/*
* 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.
*/
while ((pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, pch))) {
unsigned short id;
enum intel_pch pch_type;
if (pch->vendor != PCI_VENDOR_ID_INTEL)
continue;
id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
pch_type = intel_pch_type(dev_priv, id);
if (pch_type != PCH_NONE) {
dev_priv->pch_type = pch_type;
dev_priv->pch_id = id;
break;
} else if (intel_is_virt_pch(id, pch->subsystem_vendor,
pch->subsystem_device)) {
id = intel_virt_detect_pch(dev_priv);
pch_type = intel_pch_type(dev_priv, id);
/* Sanity check virtual PCH id */
if (WARN_ON(id && pch_type == PCH_NONE))
id = 0;
dev_priv->pch_type = pch_type;
dev_priv->pch_id = id;
break;
}
}
/*
* Use PCH_NOP (PCH but no South Display) for PCH platforms without
* display.
*/
if (pch && !HAS_DISPLAY(dev_priv)) {
DRM_DEBUG_KMS("Display disabled, reverting to NOP PCH\n");
dev_priv->pch_type = PCH_NOP;
dev_priv->pch_id = 0;
}
if (!pch)
DRM_DEBUG_KMS("No PCH found.\n");
pci_dev_put(pch);
}
static int i915_getparam_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct pci_dev *pdev = dev_priv->drm.pdev;
drm_i915_getparam_t *param = data;
int value;
switch (param->param) {
case I915_PARAM_IRQ_ACTIVE:
case I915_PARAM_ALLOW_BATCHBUFFER:
case I915_PARAM_LAST_DISPATCH:
case I915_PARAM_HAS_EXEC_CONSTANTS:
/* Reject all old ums/dri params. */
return -ENODEV;
case I915_PARAM_CHIPSET_ID:
value = pdev->device;
break;
case I915_PARAM_REVISION:
value = pdev->revision;
break;
case I915_PARAM_NUM_FENCES_AVAIL:
value = dev_priv->num_fence_regs;
break;
case I915_PARAM_HAS_OVERLAY:
value = dev_priv->overlay ? 1 : 0;
break;
case I915_PARAM_HAS_BSD:
value = !!dev_priv->engine[VCS0];
break;
case I915_PARAM_HAS_BLT:
value = !!dev_priv->engine[BCS0];
break;
case I915_PARAM_HAS_VEBOX:
value = !!dev_priv->engine[VECS0];
break;
case I915_PARAM_HAS_BSD2:
value = !!dev_priv->engine[VCS1];
break;
case I915_PARAM_HAS_LLC:
value = HAS_LLC(dev_priv);
break;
case I915_PARAM_HAS_WT:
value = HAS_WT(dev_priv);
break;
case I915_PARAM_HAS_ALIASING_PPGTT:
value = INTEL_PPGTT(dev_priv);
break;
case I915_PARAM_HAS_SEMAPHORES:
value = !!(dev_priv->caps.scheduler & I915_SCHEDULER_CAP_SEMAPHORES);
break;
case I915_PARAM_HAS_SECURE_BATCHES:
value = capable(CAP_SYS_ADMIN);
break;
case I915_PARAM_CMD_PARSER_VERSION:
value = i915_cmd_parser_get_version(dev_priv);
break;
case I915_PARAM_SUBSLICE_TOTAL:
value = sseu_subslice_total(&RUNTIME_INFO(dev_priv)->sseu);
if (!value)
return -ENODEV;
break;
case I915_PARAM_EU_TOTAL:
value = RUNTIME_INFO(dev_priv)->sseu.eu_total;
if (!value)
return -ENODEV;
break;
case I915_PARAM_HAS_GPU_RESET:
value = i915_modparams.enable_hangcheck &&
intel_has_gpu_reset(dev_priv);
if (value && intel_has_reset_engine(dev_priv))
value = 2;
break;
case I915_PARAM_HAS_RESOURCE_STREAMER:
value = 0;
break;
case I915_PARAM_HAS_POOLED_EU:
value = HAS_POOLED_EU(dev_priv);
break;
case I915_PARAM_MIN_EU_IN_POOL:
value = RUNTIME_INFO(dev_priv)->sseu.min_eu_in_pool;
break;
case I915_PARAM_HUC_STATUS:
value = intel_huc_check_status(&dev_priv->huc);
if (value < 0)
return value;
break;
case I915_PARAM_MMAP_GTT_VERSION:
/* Though we've started our numbering from 1, and so class all
* earlier versions as 0, in effect their value is undefined as
* the ioctl will report EINVAL for the unknown param!
*/
value = i915_gem_mmap_gtt_version();
break;
case I915_PARAM_HAS_SCHEDULER:
value = dev_priv->caps.scheduler;
break;
case I915_PARAM_MMAP_VERSION:
/* Remember to bump this if the version changes! */
case I915_PARAM_HAS_GEM:
case I915_PARAM_HAS_PAGEFLIPPING:
case I915_PARAM_HAS_EXECBUF2: /* depends on GEM */
case I915_PARAM_HAS_RELAXED_FENCING:
case I915_PARAM_HAS_COHERENT_RINGS:
case I915_PARAM_HAS_RELAXED_DELTA:
case I915_PARAM_HAS_GEN7_SOL_RESET:
case I915_PARAM_HAS_WAIT_TIMEOUT:
case I915_PARAM_HAS_PRIME_VMAP_FLUSH:
case I915_PARAM_HAS_PINNED_BATCHES:
case I915_PARAM_HAS_EXEC_NO_RELOC:
case I915_PARAM_HAS_EXEC_HANDLE_LUT:
case I915_PARAM_HAS_COHERENT_PHYS_GTT:
case I915_PARAM_HAS_EXEC_SOFTPIN:
case I915_PARAM_HAS_EXEC_ASYNC:
case I915_PARAM_HAS_EXEC_FENCE:
case I915_PARAM_HAS_EXEC_CAPTURE:
case I915_PARAM_HAS_EXEC_BATCH_FIRST:
case I915_PARAM_HAS_EXEC_FENCE_ARRAY:
case I915_PARAM_HAS_EXEC_SUBMIT_FENCE:
/* For the time being all of these are always true;
* if some supported hardware does not have one of these
* features this value needs to be provided from
* INTEL_INFO(), a feature macro, or similar.
*/
value = 1;
break;
case I915_PARAM_HAS_CONTEXT_ISOLATION:
value = intel_engines_has_context_isolation(dev_priv);
break;
case I915_PARAM_SLICE_MASK:
value = RUNTIME_INFO(dev_priv)->sseu.slice_mask;
if (!value)
return -ENODEV;
break;
case I915_PARAM_SUBSLICE_MASK:
value = RUNTIME_INFO(dev_priv)->sseu.subslice_mask[0];
if (!value)
return -ENODEV;
break;
case I915_PARAM_CS_TIMESTAMP_FREQUENCY:
value = 1000 * RUNTIME_INFO(dev_priv)->cs_timestamp_frequency_khz;
break;
case I915_PARAM_MMAP_GTT_COHERENT:
value = INTEL_INFO(dev_priv)->has_coherent_ggtt;
break;
default:
DRM_DEBUG("Unknown parameter %d\n", param->param);
return -EINVAL;
}
if (put_user(value, param->value))
return -EFAULT;
return 0;
}
static int i915_get_bridge_dev(struct drm_i915_private *dev_priv)
{
int domain = pci_domain_nr(dev_priv->drm.pdev->bus);
dev_priv->bridge_dev =
pci_get_domain_bus_and_slot(domain, 0, PCI_DEVFN(0, 0));
if (!dev_priv->bridge_dev) {
DRM_ERROR("bridge device not found\n");
return -1;
}
return 0;
}
/* Allocate space for the MCH regs if needed, return nonzero on error */
static int
intel_alloc_mchbar_resource(struct drm_i915_private *dev_priv)
{
int reg = INTEL_GEN(dev_priv) >= 4 ? MCHBAR_I965 : MCHBAR_I915;
u32 temp_lo, temp_hi = 0;
u64 mchbar_addr;
int ret;
if (INTEL_GEN(dev_priv) >= 4)
pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi);
pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo);
mchbar_addr = ((u64)temp_hi << 32) | temp_lo;
/* If ACPI doesn't have it, assume we need to allocate it ourselves */
#ifdef CONFIG_PNP
if (mchbar_addr &&
pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE))
return 0;
#endif
/* Get some space for it */
dev_priv->mch_res.name = "i915 MCHBAR";
dev_priv->mch_res.flags = IORESOURCE_MEM;
ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus,
&dev_priv->mch_res,
MCHBAR_SIZE, MCHBAR_SIZE,
PCIBIOS_MIN_MEM,
0, pcibios_align_resource,
dev_priv->bridge_dev);
if (ret) {
DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret);
dev_priv->mch_res.start = 0;
return ret;
}
if (INTEL_GEN(dev_priv) >= 4)
pci_write_config_dword(dev_priv->bridge_dev, reg + 4,
upper_32_bits(dev_priv->mch_res.start));
pci_write_config_dword(dev_priv->bridge_dev, reg,
lower_32_bits(dev_priv->mch_res.start));
return 0;
}
/* Setup MCHBAR if possible, return true if we should disable it again */
static void
intel_setup_mchbar(struct drm_i915_private *dev_priv)
{
int mchbar_reg = INTEL_GEN(dev_priv) >= 4 ? MCHBAR_I965 : MCHBAR_I915;
u32 temp;
bool enabled;
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
return;
dev_priv->mchbar_need_disable = false;
if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) {
pci_read_config_dword(dev_priv->bridge_dev, DEVEN, &temp);
enabled = !!(temp & DEVEN_MCHBAR_EN);
} else {
pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
enabled = temp & 1;
}
/* If it's already enabled, don't have to do anything */
if (enabled)
return;
if (intel_alloc_mchbar_resource(dev_priv))
return;
dev_priv->mchbar_need_disable = true;
/* Space is allocated or reserved, so enable it. */
if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) {
pci_write_config_dword(dev_priv->bridge_dev, DEVEN,
temp | DEVEN_MCHBAR_EN);
} else {
pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp);
pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1);
}
}
static void
intel_teardown_mchbar(struct drm_i915_private *dev_priv)
{
int mchbar_reg = INTEL_GEN(dev_priv) >= 4 ? MCHBAR_I965 : MCHBAR_I915;
if (dev_priv->mchbar_need_disable) {
if (IS_I915G(dev_priv) || IS_I915GM(dev_priv)) {
u32 deven_val;
pci_read_config_dword(dev_priv->bridge_dev, DEVEN,
&deven_val);
deven_val &= ~DEVEN_MCHBAR_EN;
pci_write_config_dword(dev_priv->bridge_dev, DEVEN,
deven_val);
} else {
u32 mchbar_val;
pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg,
&mchbar_val);
mchbar_val &= ~1;
pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg,
mchbar_val);
}
}
if (dev_priv->mch_res.start)
release_resource(&dev_priv->mch_res);
}
/* true = enable decode, false = disable decoder */
static unsigned int i915_vga_set_decode(void *cookie, bool state)
{
struct drm_i915_private *dev_priv = cookie;
intel_modeset_vga_set_state(dev_priv, state);
if (state)
return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
else
return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
}
static int i915_resume_switcheroo(struct drm_device *dev);
static int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state);
static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
{
struct drm_device *dev = pci_get_drvdata(pdev);
pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
if (state == VGA_SWITCHEROO_ON) {
pr_info("switched on\n");
dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
/* i915 resume handler doesn't set to D0 */
pci_set_power_state(pdev, PCI_D0);
i915_resume_switcheroo(dev);
dev->switch_power_state = DRM_SWITCH_POWER_ON;
} else {
pr_info("switched off\n");
dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
i915_suspend_switcheroo(dev, pmm);
dev->switch_power_state = DRM_SWITCH_POWER_OFF;
}
}
static bool i915_switcheroo_can_switch(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
/*
* FIXME: open_count is protected by drm_global_mutex but that would lead to
* locking inversion with the driver load path. And the access here is
* completely racy anyway. So don't bother with locking for now.
*/
return dev->open_count == 0;
}
static const struct vga_switcheroo_client_ops i915_switcheroo_ops = {
.set_gpu_state = i915_switcheroo_set_state,
.reprobe = NULL,
.can_switch = i915_switcheroo_can_switch,
};
static int i915_load_modeset_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct pci_dev *pdev = dev_priv->drm.pdev;
int ret;
if (i915_inject_load_failure())
return -ENODEV;
if (HAS_DISPLAY(dev_priv)) {
ret = drm_vblank_init(&dev_priv->drm,
INTEL_INFO(dev_priv)->num_pipes);
if (ret)
goto out;
}
intel_bios_init(dev_priv);
/* If we have > 1 VGA cards, then we need to arbitrate access
* to the common VGA resources.
*
* If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
* then we do not take part in VGA arbitration and the
* vga_client_register() fails with -ENODEV.
*/
ret = vga_client_register(pdev, dev_priv, NULL, i915_vga_set_decode);
if (ret && ret != -ENODEV)
goto out;
intel_register_dsm_handler();
ret = vga_switcheroo_register_client(pdev, &i915_switcheroo_ops, false);
if (ret)
goto cleanup_vga_client;
/* must happen before intel_power_domains_init_hw() on VLV/CHV */
intel_update_rawclk(dev_priv);
intel_power_domains_init_hw(dev_priv, false);
intel_csr_ucode_init(dev_priv);
ret = intel_irq_install(dev_priv);
if (ret)
goto cleanup_csr;
intel_gmbus_setup(dev_priv);
/* Important: The output setup functions called by modeset_init need
* working irqs for e.g. gmbus and dp aux transfers. */
ret = intel_modeset_init(dev);
if (ret)
goto cleanup_irq;
ret = i915_gem_init(dev_priv);
if (ret)
goto cleanup_modeset;
intel_overlay_setup(dev_priv);
if (!HAS_DISPLAY(dev_priv))
return 0;
ret = intel_fbdev_init(dev);
if (ret)
goto cleanup_gem;
/* Only enable hotplug handling once the fbdev is fully set up. */
intel_hpd_init(dev_priv);
intel_init_ipc(dev_priv);
return 0;
cleanup_gem:
i915_gem_suspend(dev_priv);
i915_gem_fini(dev_priv);
cleanup_modeset:
intel_modeset_cleanup(dev);
cleanup_irq:
drm_irq_uninstall(dev);
intel_gmbus_teardown(dev_priv);
cleanup_csr:
intel_csr_ucode_fini(dev_priv);
intel_power_domains_fini_hw(dev_priv);
vga_switcheroo_unregister_client(pdev);
cleanup_vga_client:
vga_client_register(pdev, NULL, NULL, NULL);
out:
return ret;
}
static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
{
struct apertures_struct *ap;
struct pci_dev *pdev = dev_priv->drm.pdev;
struct i915_ggtt *ggtt = &dev_priv->ggtt;
bool primary;
int ret;
ap = alloc_apertures(1);
if (!ap)
return -ENOMEM;
ap->ranges[0].base = ggtt->gmadr.start;
ap->ranges[0].size = ggtt->mappable_end;
primary =
pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
ret = drm_fb_helper_remove_conflicting_framebuffers(ap, "inteldrmfb", primary);
kfree(ap);
return ret;
}
static void intel_init_dpio(struct drm_i915_private *dev_priv)
{
/*
* IOSF_PORT_DPIO is used for VLV x2 PHY (DP/HDMI B and C),
* CHV x1 PHY (DP/HDMI D)
* IOSF_PORT_DPIO_2 is used for CHV x2 PHY (DP/HDMI B and C)
*/
if (IS_CHERRYVIEW(dev_priv)) {
DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO_2;
DPIO_PHY_IOSF_PORT(DPIO_PHY1) = IOSF_PORT_DPIO;
} else if (IS_VALLEYVIEW(dev_priv)) {
DPIO_PHY_IOSF_PORT(DPIO_PHY0) = IOSF_PORT_DPIO;
}
}
static int i915_workqueues_init(struct drm_i915_private *dev_priv)
{
/*
* The i915 workqueue is primarily used for batched retirement of
* requests (and thus managing bo) once the task has been completed
* by the GPU. i915_retire_requests() is called directly when we
* need high-priority retirement, such as waiting for an explicit
* bo.
*
* It is also used for periodic low-priority events, such as
* idle-timers and recording error state.
*
* All tasks on the workqueue are expected to acquire the dev mutex
* so there is no point in running more than one instance of the
* workqueue at any time. Use an ordered one.
*/
dev_priv->wq = alloc_ordered_workqueue("i915", 0);
if (dev_priv->wq == NULL)
goto out_err;
dev_priv->hotplug.dp_wq = alloc_ordered_workqueue("i915-dp", 0);
if (dev_priv->hotplug.dp_wq == NULL)
goto out_free_wq;
return 0;
out_free_wq:
destroy_workqueue(dev_priv->wq);
out_err:
DRM_ERROR("Failed to allocate workqueues.\n");
return -ENOMEM;
}
static void i915_engines_cleanup(struct drm_i915_private *i915)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
for_each_engine(engine, i915, id)
kfree(engine);
}
static void i915_workqueues_cleanup(struct drm_i915_private *dev_priv)
{
destroy_workqueue(dev_priv->hotplug.dp_wq);
destroy_workqueue(dev_priv->wq);
}
/*
* We don't keep the workarounds for pre-production hardware, so we expect our
* driver to fail on these machines in one way or another. A little warning on
* dmesg may help both the user and the bug triagers.
*
* Our policy for removing pre-production workarounds is to keep the
* current gen workarounds as a guide to the bring-up of the next gen
* (workarounds have a habit of persisting!). Anything older than that
* should be removed along with the complications they introduce.
*/
static void intel_detect_preproduction_hw(struct drm_i915_private *dev_priv)
{
bool pre = false;
pre |= IS_HSW_EARLY_SDV(dev_priv);
pre |= IS_SKL_REVID(dev_priv, 0, SKL_REVID_F0);
pre |= IS_BXT_REVID(dev_priv, 0, BXT_REVID_B_LAST);
pre |= IS_KBL_REVID(dev_priv, 0, KBL_REVID_A0);
if (pre) {
DRM_ERROR("This is a pre-production stepping. "
"It may not be fully functional.\n");
add_taint(TAINT_MACHINE_CHECK, LOCKDEP_STILL_OK);
}
}
/**
* i915_driver_init_early - setup state not requiring device access
* @dev_priv: device private
*
* Initialize everything that is a "SW-only" state, that is state not
* requiring accessing the device or exposing the driver via kernel internal
* or userspace interfaces. Example steps belonging here: lock initialization,
* system memory allocation, setting up device specific attributes and
* function hooks not requiring accessing the device.
*/
static int i915_driver_init_early(struct drm_i915_private *dev_priv)
{
int ret = 0;
if (i915_inject_load_failure())
return -ENODEV;
intel_device_info_subplatform_init(dev_priv);
intel_uncore_init_early(&dev_priv->uncore);
spin_lock_init(&dev_priv->irq_lock);
spin_lock_init(&dev_priv->gpu_error.lock);
mutex_init(&dev_priv->backlight_lock);
mutex_init(&dev_priv->sb_lock);
pm_qos_add_request(&dev_priv->sb_qos,
PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
mutex_init(&dev_priv->av_mutex);
mutex_init(&dev_priv->wm.wm_mutex);
mutex_init(&dev_priv->pps_mutex);
mutex_init(&dev_priv->hdcp_comp_mutex);
i915_memcpy_init_early(dev_priv);
intel_runtime_pm_init_early(dev_priv);
ret = i915_workqueues_init(dev_priv);
if (ret < 0)
goto err_engines;
ret = i915_gem_init_early(dev_priv);
if (ret < 0)
goto err_workqueues;
/* This must be called before any calls to HAS_PCH_* */
intel_detect_pch(dev_priv);
intel_wopcm_init_early(&dev_priv->wopcm);
intel_uc_init_early(dev_priv);
intel_pm_setup(dev_priv);
intel_init_dpio(dev_priv);
ret = intel_power_domains_init(dev_priv);
if (ret < 0)
goto err_uc;
intel_irq_init(dev_priv);
intel_hangcheck_init(dev_priv);
intel_init_display_hooks(dev_priv);
intel_init_clock_gating_hooks(dev_priv);
intel_init_audio_hooks(dev_priv);
intel_display_crc_init(dev_priv);
intel_detect_preproduction_hw(dev_priv);
return 0;
err_uc:
intel_uc_cleanup_early(dev_priv);
i915_gem_cleanup_early(dev_priv);
err_workqueues:
i915_workqueues_cleanup(dev_priv);
err_engines:
i915_engines_cleanup(dev_priv);
return ret;
}
/**
* i915_driver_cleanup_early - cleanup the setup done in i915_driver_init_early()
* @dev_priv: device private
*/
static void i915_driver_cleanup_early(struct drm_i915_private *dev_priv)
{
intel_irq_fini(dev_priv);
intel_power_domains_cleanup(dev_priv);
intel_uc_cleanup_early(dev_priv);
i915_gem_cleanup_early(dev_priv);
i915_workqueues_cleanup(dev_priv);
i915_engines_cleanup(dev_priv);
pm_qos_remove_request(&dev_priv->sb_qos);
mutex_destroy(&dev_priv->sb_lock);
}
/**
* i915_driver_init_mmio - setup device MMIO
* @dev_priv: device private
*
* Setup minimal device state necessary for MMIO accesses later in the
* initialization sequence. The setup here should avoid any other device-wide
* side effects or exposing the driver via kernel internal or user space
* interfaces.
*/
static int i915_driver_init_mmio(struct drm_i915_private *dev_priv)
{
int ret;
if (i915_inject_load_failure())
return -ENODEV;
if (i915_get_bridge_dev(dev_priv))
return -EIO;
ret = intel_uncore_init_mmio(&dev_priv->uncore);
if (ret < 0)
goto err_bridge;
/* Try to make sure MCHBAR is enabled before poking at it */
intel_setup_mchbar(dev_priv);
intel_device_info_init_mmio(dev_priv);
intel_uncore_prune_mmio_domains(&dev_priv->uncore);
intel_uc_init_mmio(dev_priv);
ret = intel_engines_init_mmio(dev_priv);
if (ret)
goto err_uncore;
i915_gem_init_mmio(dev_priv);
return 0;
err_uncore:
intel_teardown_mchbar(dev_priv);
intel_uncore_fini_mmio(&dev_priv->uncore);
err_bridge:
pci_dev_put(dev_priv->bridge_dev);
return ret;
}
/**
* i915_driver_cleanup_mmio - cleanup the setup done in i915_driver_init_mmio()
* @dev_priv: device private
*/
static void i915_driver_cleanup_mmio(struct drm_i915_private *dev_priv)
{
intel_teardown_mchbar(dev_priv);
intel_uncore_fini_mmio(&dev_priv->uncore);
pci_dev_put(dev_priv->bridge_dev);
}
static void intel_sanitize_options(struct drm_i915_private *dev_priv)
{
intel_gvt_sanitize_options(dev_priv);
}
#define DRAM_TYPE_STR(type) [INTEL_DRAM_ ## type] = #type
static const char *intel_dram_type_str(enum intel_dram_type type)
{
static const char * const str[] = {
DRAM_TYPE_STR(UNKNOWN),
DRAM_TYPE_STR(DDR3),
DRAM_TYPE_STR(DDR4),
DRAM_TYPE_STR(LPDDR3),
DRAM_TYPE_STR(LPDDR4),
};
if (type >= ARRAY_SIZE(str))
type = INTEL_DRAM_UNKNOWN;
return str[type];
}
#undef DRAM_TYPE_STR
static int intel_dimm_num_devices(const struct dram_dimm_info *dimm)
{
return dimm->ranks * 64 / (dimm->width ?: 1);
}
/* Returns total GB for the whole DIMM */
static int skl_get_dimm_size(u16 val)
{
return val & SKL_DRAM_SIZE_MASK;
}
static int skl_get_dimm_width(u16 val)
{
if (skl_get_dimm_size(val) == 0)
return 0;
switch (val & SKL_DRAM_WIDTH_MASK) {
case SKL_DRAM_WIDTH_X8:
case SKL_DRAM_WIDTH_X16:
case SKL_DRAM_WIDTH_X32:
val = (val & SKL_DRAM_WIDTH_MASK) >> SKL_DRAM_WIDTH_SHIFT;
return 8 << val;
default:
MISSING_CASE(val);
return 0;
}
}
static int skl_get_dimm_ranks(u16 val)
{
if (skl_get_dimm_size(val) == 0)
return 0;
val = (val & SKL_DRAM_RANK_MASK) >> SKL_DRAM_RANK_SHIFT;
return val + 1;
}
/* Returns total GB for the whole DIMM */
static int cnl_get_dimm_size(u16 val)
{
return (val & CNL_DRAM_SIZE_MASK) / 2;
}
static int cnl_get_dimm_width(u16 val)
{
if (cnl_get_dimm_size(val) == 0)
return 0;
switch (val & CNL_DRAM_WIDTH_MASK) {
case CNL_DRAM_WIDTH_X8:
case CNL_DRAM_WIDTH_X16:
case CNL_DRAM_WIDTH_X32:
val = (val & CNL_DRAM_WIDTH_MASK) >> CNL_DRAM_WIDTH_SHIFT;
return 8 << val;
default:
MISSING_CASE(val);
return 0;
}
}
static int cnl_get_dimm_ranks(u16 val)
{
if (cnl_get_dimm_size(val) == 0)
return 0;
val = (val & CNL_DRAM_RANK_MASK) >> CNL_DRAM_RANK_SHIFT;
return val + 1;
}
static bool
skl_is_16gb_dimm(const struct dram_dimm_info *dimm)
{
/* Convert total GB to Gb per DRAM device */
return 8 * dimm->size / (intel_dimm_num_devices(dimm) ?: 1) == 16;
}
static void
skl_dram_get_dimm_info(struct drm_i915_private *dev_priv,
struct dram_dimm_info *dimm,
int channel, char dimm_name, u16 val)
{
if (INTEL_GEN(dev_priv) >= 10) {
dimm->size = cnl_get_dimm_size(val);
dimm->width = cnl_get_dimm_width(val);
dimm->ranks = cnl_get_dimm_ranks(val);
} else {
dimm->size = skl_get_dimm_size(val);
dimm->width = skl_get_dimm_width(val);
dimm->ranks = skl_get_dimm_ranks(val);
}
DRM_DEBUG_KMS("CH%u DIMM %c size: %u GB, width: X%u, ranks: %u, 16Gb DIMMs: %s\n",
channel, dimm_name, dimm->size, dimm->width, dimm->ranks,
yesno(skl_is_16gb_dimm(dimm)));
}
static int
skl_dram_get_channel_info(struct drm_i915_private *dev_priv,
struct dram_channel_info *ch,
int channel, u32 val)
{
skl_dram_get_dimm_info(dev_priv, &ch->dimm_l,
channel, 'L', val & 0xffff);
skl_dram_get_dimm_info(dev_priv, &ch->dimm_s,
channel, 'S', val >> 16);
if (ch->dimm_l.size == 0 && ch->dimm_s.size == 0) {
DRM_DEBUG_KMS("CH%u not populated\n", channel);
return -EINVAL;
}
if (ch->dimm_l.ranks == 2 || ch->dimm_s.ranks == 2)
ch->ranks = 2;
else if (ch->dimm_l.ranks == 1 && ch->dimm_s.ranks == 1)
ch->ranks = 2;
else
ch->ranks = 1;
ch->is_16gb_dimm =
skl_is_16gb_dimm(&ch->dimm_l) ||
skl_is_16gb_dimm(&ch->dimm_s);
DRM_DEBUG_KMS("CH%u ranks: %u, 16Gb DIMMs: %s\n",
channel, ch->ranks, yesno(ch->is_16gb_dimm));
return 0;
}
static bool
intel_is_dram_symmetric(const struct dram_channel_info *ch0,
const struct dram_channel_info *ch1)
{
return !memcmp(ch0, ch1, sizeof(*ch0)) &&
(ch0->dimm_s.size == 0 ||
!memcmp(&ch0->dimm_l, &ch0->dimm_s, sizeof(ch0->dimm_l)));
}
static int
skl_dram_get_channels_info(struct drm_i915_private *dev_priv)
{
struct dram_info *dram_info = &dev_priv->dram_info;
struct dram_channel_info ch0 = {}, ch1 = {};
u32 val;
int ret;
val = I915_READ(SKL_MAD_DIMM_CH0_0_0_0_MCHBAR_MCMAIN);
ret = skl_dram_get_channel_info(dev_priv, &ch0, 0, val);
if (ret == 0)
dram_info->num_channels++;
val = I915_READ(SKL_MAD_DIMM_CH1_0_0_0_MCHBAR_MCMAIN);
ret = skl_dram_get_channel_info(dev_priv, &ch1, 1, val);
if (ret == 0)
dram_info->num_channels++;
if (dram_info->num_channels == 0) {
DRM_INFO("Number of memory channels is zero\n");
return -EINVAL;
}
/*
* If any of the channel is single rank channel, worst case output
* will be same as if single rank memory, so consider single rank
* memory.
*/
if (ch0.ranks == 1 || ch1.ranks == 1)
dram_info->ranks = 1;
else
dram_info->ranks = max(ch0.ranks, ch1.ranks);
if (dram_info->ranks == 0) {
DRM_INFO("couldn't get memory rank information\n");
return -EINVAL;
}
dram_info->is_16gb_dimm = ch0.is_16gb_dimm || ch1.is_16gb_dimm;
dram_info->symmetric_memory = intel_is_dram_symmetric(&ch0, &ch1);
DRM_DEBUG_KMS("Memory configuration is symmetric? %s\n",
yesno(dram_info->symmetric_memory));
return 0;
}
static enum intel_dram_type
skl_get_dram_type(struct drm_i915_private *dev_priv)
{
u32 val;
val = I915_READ(SKL_MAD_INTER_CHANNEL_0_0_0_MCHBAR_MCMAIN);
switch (val & SKL_DRAM_DDR_TYPE_MASK) {
case SKL_DRAM_DDR_TYPE_DDR3:
return INTEL_DRAM_DDR3;
case SKL_DRAM_DDR_TYPE_DDR4:
return INTEL_DRAM_DDR4;
case SKL_DRAM_DDR_TYPE_LPDDR3:
return INTEL_DRAM_LPDDR3;
case SKL_DRAM_DDR_TYPE_LPDDR4:
return INTEL_DRAM_LPDDR4;
default:
MISSING_CASE(val);
return INTEL_DRAM_UNKNOWN;
}
}
static int
skl_get_dram_info(struct drm_i915_private *dev_priv)
{
struct dram_info *dram_info = &dev_priv->dram_info;
u32 mem_freq_khz, val;
int ret;
dram_info->type = skl_get_dram_type(dev_priv);
DRM_DEBUG_KMS("DRAM type: %s\n", intel_dram_type_str(dram_info->type));
ret = skl_dram_get_channels_info(dev_priv);
if (ret)
return ret;
val = I915_READ(SKL_MC_BIOS_DATA_0_0_0_MCHBAR_PCU);
mem_freq_khz = DIV_ROUND_UP((val & SKL_REQ_DATA_MASK) *
SKL_MEMORY_FREQ_MULTIPLIER_HZ, 1000);
dram_info->bandwidth_kbps = dram_info->num_channels *
mem_freq_khz * 8;
if (dram_info->bandwidth_kbps == 0) {
DRM_INFO("Couldn't get system memory bandwidth\n");
return -EINVAL;
}
dram_info->valid = true;
return 0;
}
/* Returns Gb per DRAM device */
static int bxt_get_dimm_size(u32 val)
{
switch (val & BXT_DRAM_SIZE_MASK) {
case BXT_DRAM_SIZE_4GBIT:
return 4;
case BXT_DRAM_SIZE_6GBIT:
return 6;
case BXT_DRAM_SIZE_8GBIT:
return 8;
case BXT_DRAM_SIZE_12GBIT:
return 12;
case BXT_DRAM_SIZE_16GBIT:
return 16;
default:
MISSING_CASE(val);
return 0;
}
}
static int bxt_get_dimm_width(u32 val)
{
if (!bxt_get_dimm_size(val))
return 0;
val = (val & BXT_DRAM_WIDTH_MASK) >> BXT_DRAM_WIDTH_SHIFT;
return 8 << val;
}
static int bxt_get_dimm_ranks(u32 val)
{
if (!bxt_get_dimm_size(val))
return 0;
switch (val & BXT_DRAM_RANK_MASK) {
case BXT_DRAM_RANK_SINGLE:
return 1;
case BXT_DRAM_RANK_DUAL:
return 2;
default:
MISSING_CASE(val);
return 0;
}
}
static enum intel_dram_type bxt_get_dimm_type(u32 val)
{
if (!bxt_get_dimm_size(val))
return INTEL_DRAM_UNKNOWN;
switch (val & BXT_DRAM_TYPE_MASK) {
case BXT_DRAM_TYPE_DDR3:
return INTEL_DRAM_DDR3;
case BXT_DRAM_TYPE_LPDDR3:
return INTEL_DRAM_LPDDR3;
case BXT_DRAM_TYPE_DDR4:
return INTEL_DRAM_DDR4;
case BXT_DRAM_TYPE_LPDDR4:
return INTEL_DRAM_LPDDR4;
default:
MISSING_CASE(val);
return INTEL_DRAM_UNKNOWN;
}
}
static void bxt_get_dimm_info(struct dram_dimm_info *dimm,
u32 val)
{
dimm->width = bxt_get_dimm_width(val);
dimm->ranks = bxt_get_dimm_ranks(val);
/*
* Size in register is Gb per DRAM device. Convert to total
* GB to match the way we report this for non-LP platforms.
*/
dimm->size = bxt_get_dimm_size(val) * intel_dimm_num_devices(dimm) / 8;
}
static int
bxt_get_dram_info(struct drm_i915_private *dev_priv)
{
struct dram_info *dram_info = &dev_priv->dram_info;
u32 dram_channels;
u32 mem_freq_khz, val;
u8 num_active_channels;
int i;
val = I915_READ(BXT_P_CR_MC_BIOS_REQ_0_0_0);
mem_freq_khz = DIV_ROUND_UP((val & BXT_REQ_DATA_MASK) *
BXT_MEMORY_FREQ_MULTIPLIER_HZ, 1000);
dram_channels = val & BXT_DRAM_CHANNEL_ACTIVE_MASK;
num_active_channels = hweight32(dram_channels);
/* Each active bit represents 4-byte channel */
dram_info->bandwidth_kbps = (mem_freq_khz * num_active_channels * 4);
if (dram_info->bandwidth_kbps == 0) {
DRM_INFO("Couldn't get system memory bandwidth\n");
return -EINVAL;
}
/*
* Now read each DUNIT8/9/10/11 to check the rank of each dimms.
*/
for (i = BXT_D_CR_DRP0_DUNIT_START; i <= BXT_D_CR_DRP0_DUNIT_END; i++) {
struct dram_dimm_info dimm;
enum intel_dram_type type;
val = I915_READ(BXT_D_CR_DRP0_DUNIT(i));
if (val == 0xFFFFFFFF)
continue;
dram_info->num_channels++;
bxt_get_dimm_info(&dimm, val);
type = bxt_get_dimm_type(val);
WARN_ON(type != INTEL_DRAM_UNKNOWN &&
dram_info->type != INTEL_DRAM_UNKNOWN &&
dram_info->type != type);
DRM_DEBUG_KMS("CH%u DIMM size: %u GB, width: X%u, ranks: %u, type: %s\n",
i - BXT_D_CR_DRP0_DUNIT_START,
dimm.size, dimm.width, dimm.ranks,
intel_dram_type_str(type));
/*
* If any of the channel is single rank channel,
* worst case output will be same as if single rank
* memory, so consider single rank memory.
*/
if (dram_info->ranks == 0)
dram_info->ranks = dimm.ranks;
else if (dimm.ranks == 1)
dram_info->ranks = 1;
if (type != INTEL_DRAM_UNKNOWN)
dram_info->type = type;
}
if (dram_info->type == INTEL_DRAM_UNKNOWN ||
dram_info->ranks == 0) {
DRM_INFO("couldn't get memory information\n");
return -EINVAL;
}
dram_info->valid = true;
return 0;
}
static void
intel_get_dram_info(struct drm_i915_private *dev_priv)
{
struct dram_info *dram_info = &dev_priv->dram_info;
int ret;
/*
* Assume 16Gb DIMMs are present until proven otherwise.
* This is only used for the level 0 watermark latency
* w/a which does not apply to bxt/glk.
*/
dram_info->is_16gb_dimm = !IS_GEN9_LP(dev_priv);
if (INTEL_GEN(dev_priv) < 9)
return;
if (IS_GEN9_LP(dev_priv))
ret = bxt_get_dram_info(dev_priv);
else
ret = skl_get_dram_info(dev_priv);
if (ret)
return;
DRM_DEBUG_KMS("DRAM bandwidth: %u kBps, channels: %u\n",
dram_info->bandwidth_kbps,
dram_info->num_channels);
DRM_DEBUG_KMS("DRAM ranks: %u, 16Gb DIMMs: %s\n",
dram_info->ranks, yesno(dram_info->is_16gb_dimm));
}
static u32 gen9_edram_size_mb(struct drm_i915_private *dev_priv, u32 cap)
{
const unsigned int ways[8] = { 4, 8, 12, 16, 16, 16, 16, 16 };
const unsigned int sets[4] = { 1, 1, 2, 2 };
return EDRAM_NUM_BANKS(cap) *
ways[EDRAM_WAYS_IDX(cap)] *
sets[EDRAM_SETS_IDX(cap)];
}
static void edram_detect(struct drm_i915_private *dev_priv)
{
u32 edram_cap = 0;
if (!(IS_HASWELL(dev_priv) ||
IS_BROADWELL(dev_priv) ||
INTEL_GEN(dev_priv) >= 9))
return;
edram_cap = __raw_uncore_read32(&dev_priv->uncore, HSW_EDRAM_CAP);
/* NB: We can't write IDICR yet because we don't have gt funcs set up */
if (!(edram_cap & EDRAM_ENABLED))
return;
/*
* The needed capability bits for size calculation are not there with
* pre gen9 so return 128MB always.
*/
if (INTEL_GEN(dev_priv) < 9)
dev_priv->edram_size_mb = 128;
else
dev_priv->edram_size_mb =
gen9_edram_size_mb(dev_priv, edram_cap);
DRM_INFO("Found %uMB of eDRAM\n", dev_priv->edram_size_mb);
}
/**
* i915_driver_init_hw - setup state requiring device access
* @dev_priv: device private
*
* Setup state that requires accessing the device, but doesn't require
* exposing the driver via kernel internal or userspace interfaces.
*/
static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
{
struct pci_dev *pdev = dev_priv->drm.pdev;
int ret;
if (i915_inject_load_failure())
return -ENODEV;
intel_device_info_runtime_init(dev_priv);
if (HAS_PPGTT(dev_priv)) {
if (intel_vgpu_active(dev_priv) &&
!intel_vgpu_has_full_ppgtt(dev_priv)) {
i915_report_error(dev_priv,
"incompatible vGPU found, support for isolated ppGTT required\n");
return -ENXIO;
}
}
if (HAS_EXECLISTS(dev_priv)) {
/*
* Older GVT emulation depends upon intercepting CSB mmio,
* which we no longer use, preferring to use the HWSP cache
* instead.
*/
if (intel_vgpu_active(dev_priv) &&
!intel_vgpu_has_hwsp_emulation(dev_priv)) {
i915_report_error(dev_priv,
"old vGPU host found, support for HWSP emulation required\n");
return -ENXIO;
}
}
intel_sanitize_options(dev_priv);
/* needs to be done before ggtt probe */
edram_detect(dev_priv);
i915_perf_init(dev_priv);
ret = i915_ggtt_probe_hw(dev_priv);
if (ret)
goto err_perf;
/*
* WARNING: Apparently we must kick fbdev drivers before vgacon,
* otherwise the vga fbdev driver falls over.
*/
ret = i915_kick_out_firmware_fb(dev_priv);
if (ret) {
DRM_ERROR("failed to remove conflicting framebuffer drivers\n");
goto err_ggtt;
}
ret = vga_remove_vgacon(pdev);
if (ret) {
DRM_ERROR("failed to remove conflicting VGA console\n");
goto err_ggtt;
}
ret = i915_ggtt_init_hw(dev_priv);
if (ret)
goto err_ggtt;
ret = i915_ggtt_enable_hw(dev_priv);
if (ret) {
DRM_ERROR("failed to enable GGTT\n");
goto err_ggtt;
}
pci_set_master(pdev);
/* overlay on gen2 is broken and can't address above 1G */
if (IS_GEN(dev_priv, 2)) {
ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(30));
if (ret) {
DRM_ERROR("failed to set DMA mask\n");
goto err_ggtt;
}
}
/* 965GM sometimes incorrectly writes to hardware status page (HWS)
* using 32bit addressing, overwriting memory if HWS is located
* above 4GB.
*
* The documentation also mentions an issue with undefined
* behaviour if any general state is accessed within a page above 4GB,
* which also needs to be handled carefully.
*/
if (IS_I965G(dev_priv) || IS_I965GM(dev_priv)) {
ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
if (ret) {
DRM_ERROR("failed to set DMA mask\n");
goto err_ggtt;
}
}
pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY,
PM_QOS_DEFAULT_VALUE);
intel_uncore_sanitize(dev_priv);
intel_gt_init_workarounds(dev_priv);
i915_gem_load_init_fences(dev_priv);
/* On the 945G/GM, the chipset reports the MSI capability on the
* integrated graphics even though the support isn't actually there
* according to the published specs. It doesn't appear to function
* correctly in testing on 945G.
* This may be a side effect of MSI having been made available for PEG
* and the registers being closely associated.
*
* According to chipset errata, on the 965GM, MSI interrupts may
* be lost or delayed, and was defeatured. MSI interrupts seem to
* get lost on g4x as well, and interrupt delivery seems to stay
* properly dead afterwards. So we'll just disable them for all
* pre-gen5 chipsets.
*
* dp aux and gmbus irq on gen4 seems to be able to generate legacy
* interrupts even when in MSI mode. This results in spurious
* interrupt warnings if the legacy irq no. is shared with another
* device. The kernel then disables that interrupt source and so
* prevents the other device from working properly.
*/
if (INTEL_GEN(dev_priv) >= 5) {
if (pci_enable_msi(pdev) < 0)
DRM_DEBUG_DRIVER("can't enable MSI");
}
ret = intel_gvt_init(dev_priv);
if (ret)
goto err_msi;
intel_opregion_setup(dev_priv);
/*
* Fill the dram structure to get the system raw bandwidth and
* dram info. This will be used for memory latency calculation.
*/
intel_get_dram_info(dev_priv);
intel_bw_init_hw(dev_priv);
return 0;
err_msi:
if (pdev->msi_enabled)
pci_disable_msi(pdev);
pm_qos_remove_request(&dev_priv->pm_qos);
err_ggtt:
i915_ggtt_cleanup_hw(dev_priv);
err_perf:
i915_perf_fini(dev_priv);
return ret;
}
/**
* i915_driver_cleanup_hw - cleanup the setup done in i915_driver_init_hw()
* @dev_priv: device private
*/
static void i915_driver_cleanup_hw(struct drm_i915_private *dev_priv)
{
struct pci_dev *pdev = dev_priv->drm.pdev;
i915_perf_fini(dev_priv);
if (pdev->msi_enabled)
pci_disable_msi(pdev);
pm_qos_remove_request(&dev_priv->pm_qos);
i915_ggtt_cleanup_hw(dev_priv);
}
/**
* i915_driver_register - register the driver with the rest of the system
* @dev_priv: device private
*
* Perform any steps necessary to make the driver available via kernel
* internal or userspace interfaces.
*/
static void i915_driver_register(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = &dev_priv->drm;
i915_gem_shrinker_register(dev_priv);
i915_pmu_register(dev_priv);
/*
* Notify a valid surface after modesetting,
* when running inside a VM.
*/
if (intel_vgpu_active(dev_priv))
I915_WRITE(vgtif_reg(display_ready), VGT_DRV_DISPLAY_READY);
/* Reveal our presence to userspace */
if (drm_dev_register(dev, 0) == 0) {
i915_debugfs_register(dev_priv);
i915_setup_sysfs(dev_priv);
/* Depends on sysfs having been initialized */
i915_perf_register(dev_priv);
} else
DRM_ERROR("Failed to register driver for userspace access!\n");
if (HAS_DISPLAY(dev_priv)) {
/* Must be done after probing outputs */
intel_opregion_register(dev_priv);
acpi_video_register();
}
if (IS_GEN(dev_priv, 5))
intel_gpu_ips_init(dev_priv);
intel_audio_init(dev_priv);
/*
* Some ports require correctly set-up hpd registers for detection to
* work properly (leading to ghost connected connector status), e.g. VGA
* on gm45. Hence we can only set up the initial fbdev config after hpd
* irqs are fully enabled. We do it last so that the async config
* cannot run before the connectors are registered.
*/
intel_fbdev_initial_config_async(dev);
/*
* We need to coordinate the hotplugs with the asynchronous fbdev
* configuration, for which we use the fbdev->async_cookie.
*/
if (HAS_DISPLAY(dev_priv))
drm_kms_helper_poll_init(dev);
intel_power_domains_enable(dev_priv);
intel_runtime_pm_enable(dev_priv);
}
/**
* i915_driver_unregister - cleanup the registration done in i915_driver_regiser()
* @dev_priv: device private
*/
static void i915_driver_unregister(struct drm_i915_private *dev_priv)
{
intel_runtime_pm_disable(dev_priv);
intel_power_domains_disable(dev_priv);
intel_fbdev_unregister(dev_priv);
intel_audio_deinit(dev_priv);
/*
* After flushing the fbdev (incl. a late async config which will
* have delayed queuing of a hotplug event), then flush the hotplug
* events.
*/
drm_kms_helper_poll_fini(&dev_priv->drm);
intel_gpu_ips_teardown();
acpi_video_unregister();
intel_opregion_unregister(dev_priv);
i915_perf_unregister(dev_priv);
i915_pmu_unregister(dev_priv);
i915_teardown_sysfs(dev_priv);
drm_dev_unplug(&dev_priv->drm);
i915_gem_shrinker_unregister(dev_priv);
}
static void i915_welcome_messages(struct drm_i915_private *dev_priv)
{
if (drm_debug & DRM_UT_DRIVER) {
struct drm_printer p = drm_debug_printer("i915 device info:");
drm_printf(&p, "pciid=0x%04x rev=0x%02x platform=%s (subplatform=0x%x) gen=%i\n",
INTEL_DEVID(dev_priv),
INTEL_REVID(dev_priv),
intel_platform_name(INTEL_INFO(dev_priv)->platform),
intel_subplatform(RUNTIME_INFO(dev_priv),
INTEL_INFO(dev_priv)->platform),
INTEL_GEN(dev_priv));
intel_device_info_dump_flags(INTEL_INFO(dev_priv), &p);
intel_device_info_dump_runtime(RUNTIME_INFO(dev_priv), &p);
}
if (IS_ENABLED(CONFIG_DRM_I915_DEBUG))
DRM_INFO("DRM_I915_DEBUG enabled\n");
if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM))
DRM_INFO("DRM_I915_DEBUG_GEM enabled\n");
if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM))
DRM_INFO("DRM_I915_DEBUG_RUNTIME_PM enabled\n");
}
static struct drm_i915_private *
i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent)
{
const struct intel_device_info *match_info =
(struct intel_device_info *)ent->driver_data;
struct intel_device_info *device_info;
struct drm_i915_private *i915;
int err;
i915 = kzalloc(sizeof(*i915), GFP_KERNEL);
if (!i915)
return ERR_PTR(-ENOMEM);
err = drm_dev_init(&i915->drm, &driver, &pdev->dev);
if (err) {
kfree(i915);
return ERR_PTR(err);
}
i915->drm.pdev = pdev;
i915->drm.dev_private = i915;
pci_set_drvdata(pdev, &i915->drm);
/* Setup the write-once "constant" device info */
device_info = mkwrite_device_info(i915);
memcpy(device_info, match_info, sizeof(*device_info));
RUNTIME_INFO(i915)->device_id = pdev->device;
BUG_ON(device_info->gen > BITS_PER_TYPE(device_info->gen_mask));
return i915;
}
static void i915_driver_destroy(struct drm_i915_private *i915)
{
struct pci_dev *pdev = i915->drm.pdev;
drm_dev_fini(&i915->drm);
kfree(i915);
/* And make sure we never chase our dangling pointer from pci_dev */
pci_set_drvdata(pdev, NULL);
}
/**
* i915_driver_load - setup chip and create an initial config
* @pdev: PCI device
* @ent: matching PCI ID entry
*
* The driver load routine has to do several things:
* - drive output discovery via intel_modeset_init()
* - initialize the memory manager
* - allocate initial config memory
* - setup the DRM framebuffer with the allocated memory
*/
int i915_driver_load(struct pci_dev *pdev, const struct pci_device_id *ent)
{
const struct intel_device_info *match_info =
(struct intel_device_info *)ent->driver_data;
struct drm_i915_private *dev_priv;
int ret;
dev_priv = i915_driver_create(pdev, ent);
if (IS_ERR(dev_priv))
return PTR_ERR(dev_priv);
/* Disable nuclear pageflip by default on pre-ILK */
if (!i915_modparams.nuclear_pageflip && match_info->gen < 5)
dev_priv->drm.driver_features &= ~DRIVER_ATOMIC;
ret = pci_enable_device(pdev);
if (ret)
goto out_fini;
ret = i915_driver_init_early(dev_priv);
if (ret < 0)
goto out_pci_disable;
disable_rpm_wakeref_asserts(dev_priv);
ret = i915_driver_init_mmio(dev_priv);
if (ret < 0)
goto out_runtime_pm_put;
ret = i915_driver_init_hw(dev_priv);
if (ret < 0)
goto out_cleanup_mmio;
ret = i915_load_modeset_init(&dev_priv->drm);
if (ret < 0)
goto out_cleanup_hw;
i915_driver_register(dev_priv);
enable_rpm_wakeref_asserts(dev_priv);
i915_welcome_messages(dev_priv);
return 0;
out_cleanup_hw:
i915_driver_cleanup_hw(dev_priv);
out_cleanup_mmio:
i915_driver_cleanup_mmio(dev_priv);
out_runtime_pm_put:
enable_rpm_wakeref_asserts(dev_priv);
i915_driver_cleanup_early(dev_priv);
out_pci_disable:
pci_disable_device(pdev);
out_fini:
i915_load_error(dev_priv, "Device initialization failed (%d)\n", ret);
i915_driver_destroy(dev_priv);
return ret;
}
void i915_driver_unload(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct pci_dev *pdev = dev_priv->drm.pdev;
disable_rpm_wakeref_asserts(dev_priv);
i915_driver_unregister(dev_priv);
/*
* After unregistering the device to prevent any new users, cancel
* all in-flight requests so that we can quickly unbind the active
* resources.
*/
i915_gem_set_wedged(dev_priv);
/* Flush any external code that still may be under the RCU lock */
synchronize_rcu();
i915_gem_suspend(dev_priv);
drm_atomic_helper_shutdown(dev);
intel_gvt_cleanup(dev_priv);
intel_modeset_cleanup(dev);
intel_bios_cleanup(dev_priv);
vga_switcheroo_unregister_client(pdev);
vga_client_register(pdev, NULL, NULL, NULL);
intel_csr_ucode_fini(dev_priv);
/* Free error state after interrupts are fully disabled. */
cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
i915_reset_error_state(dev_priv);
i915_gem_fini(dev_priv);
intel_power_domains_fini_hw(dev_priv);
i915_driver_cleanup_hw(dev_priv);
i915_driver_cleanup_mmio(dev_priv);
enable_rpm_wakeref_asserts(dev_priv);
intel_runtime_pm_cleanup(dev_priv);
}
static void i915_driver_release(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
i915_driver_cleanup_early(dev_priv);
i915_driver_destroy(dev_priv);
}
static int i915_driver_open(struct drm_device *dev, struct drm_file *file)
{
struct drm_i915_private *i915 = to_i915(dev);
int ret;
ret = i915_gem_open(i915, file);
if (ret)
return ret;
return 0;
}
/**
* i915_driver_lastclose - clean up after all DRM clients have exited
* @dev: DRM device
*
* Take care of cleaning up after all DRM clients have exited. In the
* mode setting case, we want to restore the kernel's initial mode (just
* in case the last client left us in a bad state).
*
* Additionally, in the non-mode setting case, we'll tear down the GTT
* and DMA structures, since the kernel won't be using them, and clea
* up any GEM state.
*/
static void i915_driver_lastclose(struct drm_device *dev)
{
intel_fbdev_restore_mode(dev);
vga_switcheroo_process_delayed_switch();
}
static void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
{
struct drm_i915_file_private *file_priv = file->driver_priv;
mutex_lock(&dev->struct_mutex);
i915_gem_context_close(file);
i915_gem_release(dev, file);
mutex_unlock(&dev->struct_mutex);
kfree(file_priv);
}
static void intel_suspend_encoders(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = &dev_priv->drm;
struct intel_encoder *encoder;
drm_modeset_lock_all(dev);
for_each_intel_encoder(dev, encoder)
if (encoder->suspend)
encoder->suspend(encoder);
drm_modeset_unlock_all(dev);
}
static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
bool rpm_resume);
static int vlv_suspend_complete(struct drm_i915_private *dev_priv);
static bool suspend_to_idle(struct drm_i915_private *dev_priv)
{
#if IS_ENABLED(CONFIG_ACPI_SLEEP)
if (acpi_target_system_state() < ACPI_STATE_S3)
return true;
#endif
return false;
}
static int i915_drm_prepare(struct drm_device *dev)
{
struct drm_i915_private *i915 = to_i915(dev);
/*
* NB intel_display_suspend() may issue new requests after we've
* ostensibly marked the GPU as ready-to-sleep here. We need to
* split out that work and pull it forward so that after point,
* the GPU is not woken again.
*/
i915_gem_suspend(i915);
return 0;
}
static int i915_drm_suspend(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct pci_dev *pdev = dev_priv->drm.pdev;
pci_power_t opregion_target_state;
disable_rpm_wakeref_asserts(dev_priv);
/* We do a lot of poking in a lot of registers, make sure they work
* properly. */
intel_power_domains_disable(dev_priv);
drm_kms_helper_poll_disable(dev);
pci_save_state(pdev);
intel_display_suspend(dev);
intel_dp_mst_suspend(dev_priv);
intel_runtime_pm_disable_interrupts(dev_priv);
intel_hpd_cancel_work(dev_priv);
intel_suspend_encoders(dev_priv);
intel_suspend_hw(dev_priv);
i915_gem_suspend_gtt_mappings(dev_priv);
i915_save_state(dev_priv);
opregion_target_state = suspend_to_idle(dev_priv) ? PCI_D1 : PCI_D3cold;
intel_opregion_suspend(dev_priv, opregion_target_state);
intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED, true);
dev_priv->suspend_count++;
intel_csr_ucode_suspend(dev_priv);
enable_rpm_wakeref_asserts(dev_priv);
return 0;
}
static enum i915_drm_suspend_mode
get_suspend_mode(struct drm_i915_private *dev_priv, bool hibernate)
{
if (hibernate)
return I915_DRM_SUSPEND_HIBERNATE;
if (suspend_to_idle(dev_priv))
return I915_DRM_SUSPEND_IDLE;
return I915_DRM_SUSPEND_MEM;
}
static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct pci_dev *pdev = dev_priv->drm.pdev;
int ret;
disable_rpm_wakeref_asserts(dev_priv);
i915_gem_suspend_late(dev_priv);
intel_uncore_suspend(&dev_priv->uncore);
intel_power_domains_suspend(dev_priv,
get_suspend_mode(dev_priv, hibernation));
ret = 0;
if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv))
bxt_enable_dc9(dev_priv);
else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
hsw_enable_pc8(dev_priv);
else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
ret = vlv_suspend_complete(dev_priv);
if (ret) {
DRM_ERROR("Suspend complete failed: %d\n", ret);
intel_power_domains_resume(dev_priv);
goto out;
}
pci_disable_device(pdev);
/*
* During hibernation on some platforms the BIOS may try to access
* the device even though it's already in D3 and hang the machine. So
* leave the device in D0 on those platforms and hope the BIOS will
* power down the device properly. The issue was seen on multiple old
* GENs with different BIOS vendors, so having an explicit blacklist
* is inpractical; apply the workaround on everything pre GEN6. The
* platforms where the issue was seen:
* Lenovo Thinkpad X301, X61s, X60, T60, X41
* Fujitsu FSC S7110
* Acer Aspire 1830T
*/
if (!(hibernation && INTEL_GEN(dev_priv) < 6))
pci_set_power_state(pdev, PCI_D3hot);
out:
enable_rpm_wakeref_asserts(dev_priv);
if (!dev_priv->uncore.user_forcewake.count)
intel_runtime_pm_cleanup(dev_priv);
return ret;
}
static int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state)
{
int error;
if (!dev) {
DRM_ERROR("dev: %p\n", dev);
DRM_ERROR("DRM not initialized, aborting suspend.\n");
return -ENODEV;
}
if (WARN_ON_ONCE(state.event != PM_EVENT_SUSPEND &&
state.event != PM_EVENT_FREEZE))
return -EINVAL;
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
error = i915_drm_suspend(dev);
if (error)
return error;
return i915_drm_suspend_late(dev, false);
}
static int i915_drm_resume(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
int ret;
disable_rpm_wakeref_asserts(dev_priv);
intel_sanitize_gt_powersave(dev_priv);
i915_gem_sanitize(dev_priv);
ret = i915_ggtt_enable_hw(dev_priv);
if (ret)
DRM_ERROR("failed to re-enable GGTT\n");
intel_csr_ucode_resume(dev_priv);
i915_restore_state(dev_priv);
intel_pps_unlock_regs_wa(dev_priv);
intel_init_pch_refclk(dev_priv);
/*
* Interrupts have to be enabled before any batches are run. If not the
* GPU will hang. i915_gem_init_hw() will initiate batches to
* update/restore the context.
*
* drm_mode_config_reset() needs AUX interrupts.
*
* Modeset enabling in intel_modeset_init_hw() also needs working
* interrupts.
*/
intel_runtime_pm_enable_interrupts(dev_priv);
drm_mode_config_reset(dev);
i915_gem_resume(dev_priv);
intel_modeset_init_hw(dev);
intel_init_clock_gating(dev_priv);
spin_lock_irq(&dev_priv->irq_lock);
if (dev_priv->display.hpd_irq_setup)
dev_priv->display.hpd_irq_setup(dev_priv);
spin_unlock_irq(&dev_priv->irq_lock);
intel_dp_mst_resume(dev_priv);
intel_display_resume(dev);
drm_kms_helper_poll_enable(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 lose hotplug
* notifications.
* */
intel_hpd_init(dev_priv);
intel_opregion_resume(dev_priv);
intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING, false);
intel_power_domains_enable(dev_priv);
enable_rpm_wakeref_asserts(dev_priv);
return 0;
}
static int i915_drm_resume_early(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct pci_dev *pdev = dev_priv->drm.pdev;
int ret;
/*
* We have a resume ordering issue with the snd-hda driver also
* requiring our device to be power up. Due to the lack of a
* parent/child relationship we currently solve this with an early
* resume hook.
*
* FIXME: This should be solved with a special hdmi sink device or
* similar so that power domains can be employed.
*/
/*
* Note that we need to set the power state explicitly, since we
* powered off the device during freeze and the PCI core won't power
* it back up for us during thaw. Powering off the device during
* freeze is not a hard requirement though, and during the
* suspend/resume phases the PCI core makes sure we get here with the
* device powered on. So in case we change our freeze logic and keep
* the device powered we can also remove the following set power state
* call.
*/
ret = pci_set_power_state(pdev, PCI_D0);
if (ret) {
DRM_ERROR("failed to set PCI D0 power state (%d)\n", ret);
return ret;
}
/*
* Note that pci_enable_device() first enables any parent bridge
* device and only then sets the power state for this device. The
* bridge enabling is a nop though, since bridge devices are resumed
* first. The order of enabling power and enabling the device is
* imposed by the PCI core as described above, so here we preserve the
* same order for the freeze/thaw phases.
*
* TODO: eventually we should remove pci_disable_device() /
* pci_enable_enable_device() from suspend/resume. Due to how they
* depend on the device enable refcount we can't anyway depend on them
* disabling/enabling the device.
*/
if (pci_enable_device(pdev))
return -EIO;
pci_set_master(pdev);
disable_rpm_wakeref_asserts(dev_priv);
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
ret = vlv_resume_prepare(dev_priv, false);
if (ret)
DRM_ERROR("Resume prepare failed: %d, continuing anyway\n",
ret);
intel_uncore_resume_early(&dev_priv->uncore);
i915_check_and_clear_faults(dev_priv);
if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv)) {
gen9_sanitize_dc_state(dev_priv);
bxt_disable_dc9(dev_priv);
} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
hsw_disable_pc8(dev_priv);
}
intel_uncore_sanitize(dev_priv);
intel_power_domains_resume(dev_priv);
intel_gt_sanitize(dev_priv, true);
enable_rpm_wakeref_asserts(dev_priv);
return ret;
}
static int i915_resume_switcheroo(struct drm_device *dev)
{
int ret;
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
ret = i915_drm_resume_early(dev);
if (ret)
return ret;
return i915_drm_resume(dev);
}
static int i915_pm_prepare(struct device *kdev)
{
struct pci_dev *pdev = to_pci_dev(kdev);
struct drm_device *dev = pci_get_drvdata(pdev);
if (!dev) {
dev_err(kdev, "DRM not initialized, aborting suspend.\n");
return -ENODEV;
}
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
return i915_drm_prepare(dev);
}
static int i915_pm_suspend(struct device *kdev)
{
struct pci_dev *pdev = to_pci_dev(kdev);
struct drm_device *dev = pci_get_drvdata(pdev);
if (!dev) {
dev_err(kdev, "DRM not initialized, aborting suspend.\n");
return -ENODEV;
}
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
return i915_drm_suspend(dev);
}
static int i915_pm_suspend_late(struct device *kdev)
{
struct drm_device *dev = &kdev_to_i915(kdev)->drm;
/*
* We have a suspend ordering issue with the snd-hda driver also
* requiring our device to be power up. Due to the lack of a
* parent/child relationship we currently solve this with an late
* suspend hook.
*
* FIXME: This should be solved with a special hdmi sink device or
* similar so that power domains can be employed.
*/
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
return i915_drm_suspend_late(dev, false);
}
static int i915_pm_poweroff_late(struct device *kdev)
{
struct drm_device *dev = &kdev_to_i915(kdev)->drm;
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
return i915_drm_suspend_late(dev, true);
}
static int i915_pm_resume_early(struct device *kdev)
{
struct drm_device *dev = &kdev_to_i915(kdev)->drm;
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
return i915_drm_resume_early(dev);
}
static int i915_pm_resume(struct device *kdev)
{
struct drm_device *dev = &kdev_to_i915(kdev)->drm;
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
return i915_drm_resume(dev);
}
/* freeze: before creating the hibernation_image */
static int i915_pm_freeze(struct device *kdev)
{
struct drm_device *dev = &kdev_to_i915(kdev)->drm;
int ret;
if (dev->switch_power_state != DRM_SWITCH_POWER_OFF) {
ret = i915_drm_suspend(dev);
if (ret)
return ret;
}
ret = i915_gem_freeze(kdev_to_i915(kdev));
if (ret)
return ret;
return 0;
}
static int i915_pm_freeze_late(struct device *kdev)
{
struct drm_device *dev = &kdev_to_i915(kdev)->drm;
int ret;
if (dev->switch_power_state != DRM_SWITCH_POWER_OFF) {
ret = i915_drm_suspend_late(dev, true);
if (ret)
return ret;
}
ret = i915_gem_freeze_late(kdev_to_i915(kdev));
if (ret)
return ret;
return 0;
}
/* thaw: called after creating the hibernation image, but before turning off. */
static int i915_pm_thaw_early(struct device *kdev)
{
return i915_pm_resume_early(kdev);
}
static int i915_pm_thaw(struct device *kdev)
{
return i915_pm_resume(kdev);
}
/* restore: called after loading the hibernation image. */
static int i915_pm_restore_early(struct device *kdev)
{
return i915_pm_resume_early(kdev);
}
static int i915_pm_restore(struct device *kdev)
{
return i915_pm_resume(kdev);
}
/*
* Save all Gunit registers that may be lost after a D3 and a subsequent
* S0i[R123] transition. The list of registers needing a save/restore is
* defined in the VLV2_S0IXRegs document. This documents marks all Gunit
* registers in the following way:
* - Driver: saved/restored by the driver
* - Punit : saved/restored by the Punit firmware
* - No, w/o marking: no need to save/restore, since the register is R/O or
* used internally by the HW in a way that doesn't depend
* keeping the content across a suspend/resume.
* - Debug : used for debugging
*
* We save/restore all registers marked with 'Driver', with the following
* exceptions:
* - Registers out of use, including also registers marked with 'Debug'.
* These have no effect on the driver's operation, so we don't save/restore
* them to reduce the overhead.
* - Registers that are fully setup by an initialization function called from
* the resume path. For example many clock gating and RPS/RC6 registers.
* - Registers that provide the right functionality with their reset defaults.
*
* TODO: Except for registers that based on the above 3 criteria can be safely
* ignored, we save/restore all others, practically treating the HW context as
* a black-box for the driver. Further investigation is needed to reduce the
* saved/restored registers even further, by following the same 3 criteria.
*/
static void vlv_save_gunit_s0ix_state(struct drm_i915_private *dev_priv)
{
struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
int i;
/* GAM 0x4000-0x4770 */
s->wr_watermark = I915_READ(GEN7_WR_WATERMARK);
s->gfx_prio_ctrl = I915_READ(GEN7_GFX_PRIO_CTRL);
s->arb_mode = I915_READ(ARB_MODE);
s->gfx_pend_tlb0 = I915_READ(GEN7_GFX_PEND_TLB0);
s->gfx_pend_tlb1 = I915_READ(GEN7_GFX_PEND_TLB1);
for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
s->lra_limits[i] = I915_READ(GEN7_LRA_LIMITS(i));
s->media_max_req_count = I915_READ(GEN7_MEDIA_MAX_REQ_COUNT);
s->gfx_max_req_count = I915_READ(GEN7_GFX_MAX_REQ_COUNT);
s->render_hwsp = I915_READ(RENDER_HWS_PGA_GEN7);
s->ecochk = I915_READ(GAM_ECOCHK);
s->bsd_hwsp = I915_READ(BSD_HWS_PGA_GEN7);
s->blt_hwsp = I915_READ(BLT_HWS_PGA_GEN7);
s->tlb_rd_addr = I915_READ(GEN7_TLB_RD_ADDR);
/* MBC 0x9024-0x91D0, 0x8500 */
s->g3dctl = I915_READ(VLV_G3DCTL);
s->gsckgctl = I915_READ(VLV_GSCKGCTL);
s->mbctl = I915_READ(GEN6_MBCTL);
/* GCP 0x9400-0x9424, 0x8100-0x810C */
s->ucgctl1 = I915_READ(GEN6_UCGCTL1);
s->ucgctl3 = I915_READ(GEN6_UCGCTL3);
s->rcgctl1 = I915_READ(GEN6_RCGCTL1);
s->rcgctl2 = I915_READ(GEN6_RCGCTL2);
s->rstctl = I915_READ(GEN6_RSTCTL);
s->misccpctl = I915_READ(GEN7_MISCCPCTL);
/* GPM 0xA000-0xAA84, 0x8000-0x80FC */
s->gfxpause = I915_READ(GEN6_GFXPAUSE);
s->rpdeuhwtc = I915_READ(GEN6_RPDEUHWTC);
s->rpdeuc = I915_READ(GEN6_RPDEUC);
s->ecobus = I915_READ(ECOBUS);
s->pwrdwnupctl = I915_READ(VLV_PWRDWNUPCTL);
s->rp_down_timeout = I915_READ(GEN6_RP_DOWN_TIMEOUT);
s->rp_deucsw = I915_READ(GEN6_RPDEUCSW);
s->rcubmabdtmr = I915_READ(GEN6_RCUBMABDTMR);
s->rcedata = I915_READ(VLV_RCEDATA);
s->spare2gh = I915_READ(VLV_SPAREG2H);
/* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
s->gt_imr = I915_READ(GTIMR);
s->gt_ier = I915_READ(GTIER);
s->pm_imr = I915_READ(GEN6_PMIMR);
s->pm_ier = I915_READ(GEN6_PMIER);
for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
s->gt_scratch[i] = I915_READ(GEN7_GT_SCRATCH(i));
/* GT SA CZ domain, 0x100000-0x138124 */
s->tilectl = I915_READ(TILECTL);
s->gt_fifoctl = I915_READ(GTFIFOCTL);
s->gtlc_wake_ctrl = I915_READ(VLV_GTLC_WAKE_CTRL);
s->gtlc_survive = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
s->pmwgicz = I915_READ(VLV_PMWGICZ);
/* Gunit-Display CZ domain, 0x182028-0x1821CF */
s->gu_ctl0 = I915_READ(VLV_GU_CTL0);
s->gu_ctl1 = I915_READ(VLV_GU_CTL1);
s->pcbr = I915_READ(VLV_PCBR);
s->clock_gate_dis2 = I915_READ(VLV_GUNIT_CLOCK_GATE2);
/*
* Not saving any of:
* DFT, 0x9800-0x9EC0
* SARB, 0xB000-0xB1FC
* GAC, 0x5208-0x524C, 0x14000-0x14C000
* PCI CFG
*/
}
static void vlv_restore_gunit_s0ix_state(struct drm_i915_private *dev_priv)
{
struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
u32 val;
int i;
/* GAM 0x4000-0x4770 */
I915_WRITE(GEN7_WR_WATERMARK, s->wr_watermark);
I915_WRITE(GEN7_GFX_PRIO_CTRL, s->gfx_prio_ctrl);
I915_WRITE(ARB_MODE, s->arb_mode | (0xffff << 16));
I915_WRITE(GEN7_GFX_PEND_TLB0, s->gfx_pend_tlb0);
I915_WRITE(GEN7_GFX_PEND_TLB1, s->gfx_pend_tlb1);
for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
I915_WRITE(GEN7_LRA_LIMITS(i), s->lra_limits[i]);
I915_WRITE(GEN7_MEDIA_MAX_REQ_COUNT, s->media_max_req_count);
I915_WRITE(GEN7_GFX_MAX_REQ_COUNT, s->gfx_max_req_count);
I915_WRITE(RENDER_HWS_PGA_GEN7, s->render_hwsp);
I915_WRITE(GAM_ECOCHK, s->ecochk);
I915_WRITE(BSD_HWS_PGA_GEN7, s->bsd_hwsp);
I915_WRITE(BLT_HWS_PGA_GEN7, s->blt_hwsp);
I915_WRITE(GEN7_TLB_RD_ADDR, s->tlb_rd_addr);
/* MBC 0x9024-0x91D0, 0x8500 */
I915_WRITE(VLV_G3DCTL, s->g3dctl);
I915_WRITE(VLV_GSCKGCTL, s->gsckgctl);
I915_WRITE(GEN6_MBCTL, s->mbctl);
/* GCP 0x9400-0x9424, 0x8100-0x810C */
I915_WRITE(GEN6_UCGCTL1, s->ucgctl1);
I915_WRITE(GEN6_UCGCTL3, s->ucgctl3);
I915_WRITE(GEN6_RCGCTL1, s->rcgctl1);
I915_WRITE(GEN6_RCGCTL2, s->rcgctl2);
I915_WRITE(GEN6_RSTCTL, s->rstctl);
I915_WRITE(GEN7_MISCCPCTL, s->misccpctl);
/* GPM 0xA000-0xAA84, 0x8000-0x80FC */
I915_WRITE(GEN6_GFXPAUSE, s->gfxpause);
I915_WRITE(GEN6_RPDEUHWTC, s->rpdeuhwtc);
I915_WRITE(GEN6_RPDEUC, s->rpdeuc);
I915_WRITE(ECOBUS, s->ecobus);
I915_WRITE(VLV_PWRDWNUPCTL, s->pwrdwnupctl);
I915_WRITE(GEN6_RP_DOWN_TIMEOUT,s->rp_down_timeout);
I915_WRITE(GEN6_RPDEUCSW, s->rp_deucsw);
I915_WRITE(GEN6_RCUBMABDTMR, s->rcubmabdtmr);
I915_WRITE(VLV_RCEDATA, s->rcedata);
I915_WRITE(VLV_SPAREG2H, s->spare2gh);
/* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
I915_WRITE(GTIMR, s->gt_imr);
I915_WRITE(GTIER, s->gt_ier);
I915_WRITE(GEN6_PMIMR, s->pm_imr);
I915_WRITE(GEN6_PMIER, s->pm_ier);
for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
I915_WRITE(GEN7_GT_SCRATCH(i), s->gt_scratch[i]);
/* GT SA CZ domain, 0x100000-0x138124 */
I915_WRITE(TILECTL, s->tilectl);
I915_WRITE(GTFIFOCTL, s->gt_fifoctl);
/*
* Preserve the GT allow wake and GFX force clock bit, they are not
* be restored, as they are used to control the s0ix suspend/resume
* sequence by the caller.
*/
val = I915_READ(VLV_GTLC_WAKE_CTRL);
val &= VLV_GTLC_ALLOWWAKEREQ;
val |= s->gtlc_wake_ctrl & ~VLV_GTLC_ALLOWWAKEREQ;
I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
val &= VLV_GFX_CLK_FORCE_ON_BIT;
val |= s->gtlc_survive & ~VLV_GFX_CLK_FORCE_ON_BIT;
I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
I915_WRITE(VLV_PMWGICZ, s->pmwgicz);
/* Gunit-Display CZ domain, 0x182028-0x1821CF */
I915_WRITE(VLV_GU_CTL0, s->gu_ctl0);
I915_WRITE(VLV_GU_CTL1, s->gu_ctl1);
I915_WRITE(VLV_PCBR, s->pcbr);
I915_WRITE(VLV_GUNIT_CLOCK_GATE2, s->clock_gate_dis2);
}
static int vlv_wait_for_pw_status(struct drm_i915_private *dev_priv,
u32 mask, u32 val)
{
i915_reg_t reg = VLV_GTLC_PW_STATUS;
u32 reg_value;
int ret;
/* The HW does not like us polling for PW_STATUS frequently, so
* use the sleeping loop rather than risk the busy spin within
* intel_wait_for_register().
*
* Transitioning between RC6 states should be at most 2ms (see
* valleyview_enable_rps) so use a 3ms timeout.
*/
ret = wait_for(((reg_value = I915_READ_NOTRACE(reg)) & mask) == val, 3);
/* just trace the final value */
trace_i915_reg_rw(false, reg, reg_value, sizeof(reg_value), true);
return ret;
}
int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on)
{
u32 val;
int err;
val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
val &= ~VLV_GFX_CLK_FORCE_ON_BIT;
if (force_on)
val |= VLV_GFX_CLK_FORCE_ON_BIT;
I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
if (!force_on)
return 0;
err = intel_wait_for_register(&dev_priv->uncore,
VLV_GTLC_SURVIVABILITY_REG,
VLV_GFX_CLK_STATUS_BIT,
VLV_GFX_CLK_STATUS_BIT,
20);
if (err)
DRM_ERROR("timeout waiting for GFX clock force-on (%08x)\n",
I915_READ(VLV_GTLC_SURVIVABILITY_REG));
return err;
}
static int vlv_allow_gt_wake(struct drm_i915_private *dev_priv, bool allow)
{
u32 mask;
u32 val;
int err;
val = I915_READ(VLV_GTLC_WAKE_CTRL);
val &= ~VLV_GTLC_ALLOWWAKEREQ;
if (allow)
val |= VLV_GTLC_ALLOWWAKEREQ;
I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
POSTING_READ(VLV_GTLC_WAKE_CTRL);
mask = VLV_GTLC_ALLOWWAKEACK;
val = allow ? mask : 0;
err = vlv_wait_for_pw_status(dev_priv, mask, val);
if (err)
DRM_ERROR("timeout disabling GT waking\n");
return err;
}
static void vlv_wait_for_gt_wells(struct drm_i915_private *dev_priv,
bool wait_for_on)
{
u32 mask;
u32 val;
mask = VLV_GTLC_PW_MEDIA_STATUS_MASK | VLV_GTLC_PW_RENDER_STATUS_MASK;
val = wait_for_on ? mask : 0;
/*
* RC6 transitioning can be delayed up to 2 msec (see
* valleyview_enable_rps), use 3 msec for safety.
*
* This can fail to turn off the rc6 if the GPU is stuck after a failed
* reset and we are trying to force the machine to sleep.
*/
if (vlv_wait_for_pw_status(dev_priv, mask, val))
DRM_DEBUG_DRIVER("timeout waiting for GT wells to go %s\n",
onoff(wait_for_on));
}
static void vlv_check_no_gt_access(struct drm_i915_private *dev_priv)
{
if (!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEERR))
return;
DRM_DEBUG_DRIVER("GT register access while GT waking disabled\n");
I915_WRITE(VLV_GTLC_PW_STATUS, VLV_GTLC_ALLOWWAKEERR);
}
static int vlv_suspend_complete(struct drm_i915_private *dev_priv)
{
u32 mask;
int err;
/*
* Bspec defines the following GT well on flags as debug only, so
* don't treat them as hard failures.
*/
vlv_wait_for_gt_wells(dev_priv, false);
mask = VLV_GTLC_RENDER_CTX_EXISTS | VLV_GTLC_MEDIA_CTX_EXISTS;
WARN_ON((I915_READ(VLV_GTLC_WAKE_CTRL) & mask) != mask);
vlv_check_no_gt_access(dev_priv);
err = vlv_force_gfx_clock(dev_priv, true);
if (err)
goto err1;
err = vlv_allow_gt_wake(dev_priv, false);
if (err)
goto err2;
if (!IS_CHERRYVIEW(dev_priv))
vlv_save_gunit_s0ix_state(dev_priv);
err = vlv_force_gfx_clock(dev_priv, false);
if (err)
goto err2;
return 0;
err2:
/* For safety always re-enable waking and disable gfx clock forcing */
vlv_allow_gt_wake(dev_priv, true);
err1:
vlv_force_gfx_clock(dev_priv, false);
return err;
}
static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
bool rpm_resume)
{
int err;
int ret;
/*
* If any of the steps fail just try to continue, that's the best we
* can do at this point. Return the first error code (which will also
* leave RPM permanently disabled).
*/
ret = vlv_force_gfx_clock(dev_priv, true);
if (!IS_CHERRYVIEW(dev_priv))
vlv_restore_gunit_s0ix_state(dev_priv);
err = vlv_allow_gt_wake(dev_priv, true);
if (!ret)
ret = err;
err = vlv_force_gfx_clock(dev_priv, false);
if (!ret)
ret = err;
vlv_check_no_gt_access(dev_priv);
if (rpm_resume)
intel_init_clock_gating(dev_priv);
return ret;
}
static int intel_runtime_suspend(struct device *kdev)
{
struct pci_dev *pdev = to_pci_dev(kdev);
struct drm_device *dev = pci_get_drvdata(pdev);
struct drm_i915_private *dev_priv = to_i915(dev);
int ret;
if (WARN_ON_ONCE(!(dev_priv->gt_pm.rc6.enabled && HAS_RC6(dev_priv))))
return -ENODEV;
if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev_priv)))
return -ENODEV;
DRM_DEBUG_KMS("Suspending device\n");
disable_rpm_wakeref_asserts(dev_priv);
/*
* We are safe here against re-faults, since the fault handler takes
* an RPM reference.
*/
i915_gem_runtime_suspend(dev_priv);
intel_uc_runtime_suspend(dev_priv);
intel_runtime_pm_disable_interrupts(dev_priv);
intel_uncore_suspend(&dev_priv->uncore);
ret = 0;
if (INTEL_GEN(dev_priv) >= 11) {
icl_display_core_uninit(dev_priv);
bxt_enable_dc9(dev_priv);
} else if (IS_GEN9_LP(dev_priv)) {
bxt_display_core_uninit(dev_priv);
bxt_enable_dc9(dev_priv);
} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
hsw_enable_pc8(dev_priv);
} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
ret = vlv_suspend_complete(dev_priv);
}
if (ret) {
DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret);
intel_uncore_runtime_resume(&dev_priv->uncore);
intel_runtime_pm_enable_interrupts(dev_priv);
intel_uc_resume(dev_priv);
i915_gem_init_swizzling(dev_priv);
i915_gem_restore_fences(dev_priv);
enable_rpm_wakeref_asserts(dev_priv);
return ret;
}
enable_rpm_wakeref_asserts(dev_priv);
intel_runtime_pm_cleanup(dev_priv);
if (intel_uncore_arm_unclaimed_mmio_detection(&dev_priv->uncore))
DRM_ERROR("Unclaimed access detected prior to suspending\n");
dev_priv->runtime_pm.suspended = true;
/*
* FIXME: We really should find a document that references the arguments
* used below!
*/
if (IS_BROADWELL(dev_priv)) {
/*
* On Broadwell, if we use PCI_D1 the PCH DDI ports will stop
* being detected, and the call we do at intel_runtime_resume()
* won't be able to restore them. Since PCI_D3hot matches the
* actual specification and appears to be working, use it.
*/
intel_opregion_notify_adapter(dev_priv, PCI_D3hot);
} else {
/*
* current versions of firmware which depend on this opregion
* notification have repurposed the D1 definition to mean
* "runtime suspended" vs. what you would normally expect (D3)
* to distinguish it from notifications that might be sent via
* the suspend path.
*/
intel_opregion_notify_adapter(dev_priv, PCI_D1);
}
assert_forcewakes_inactive(&dev_priv->uncore);
if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
intel_hpd_poll_init(dev_priv);
DRM_DEBUG_KMS("Device suspended\n");
return 0;
}
static int intel_runtime_resume(struct device *kdev)
{
struct pci_dev *pdev = to_pci_dev(kdev);
struct drm_device *dev = pci_get_drvdata(pdev);
struct drm_i915_private *dev_priv = to_i915(dev);
int ret = 0;
if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev_priv)))
return -ENODEV;
DRM_DEBUG_KMS("Resuming device\n");
WARN_ON_ONCE(atomic_read(&dev_priv->runtime_pm.wakeref_count));
disable_rpm_wakeref_asserts(dev_priv);
intel_opregion_notify_adapter(dev_priv, PCI_D0);
dev_priv->runtime_pm.suspended = false;
if (intel_uncore_unclaimed_mmio(&dev_priv->uncore))
DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n");
if (INTEL_GEN(dev_priv) >= 11) {
bxt_disable_dc9(dev_priv);
icl_display_core_init(dev_priv, true);
if (dev_priv->csr.dmc_payload) {
if (dev_priv->csr.allowed_dc_mask &
DC_STATE_EN_UPTO_DC6)
skl_enable_dc6(dev_priv);
else if (dev_priv->csr.allowed_dc_mask &
DC_STATE_EN_UPTO_DC5)
gen9_enable_dc5(dev_priv);
}
} else if (IS_GEN9_LP(dev_priv)) {
bxt_disable_dc9(dev_priv);
bxt_display_core_init(dev_priv, true);
if (dev_priv->csr.dmc_payload &&
(dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC5))
gen9_enable_dc5(dev_priv);
} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
hsw_disable_pc8(dev_priv);
} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
ret = vlv_resume_prepare(dev_priv, true);
}
intel_uncore_runtime_resume(&dev_priv->uncore);
intel_runtime_pm_enable_interrupts(dev_priv);
intel_uc_resume(dev_priv);
/*
* No point of rolling back things in case of an error, as the best
* we can do is to hope that things will still work (and disable RPM).
*/
i915_gem_init_swizzling(dev_priv);
i915_gem_restore_fences(dev_priv);
/*
* On VLV/CHV display interrupts are part of the display
* power well, so hpd is reinitialized from there. For
* everyone else do it here.
*/
if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
intel_hpd_init(dev_priv);
intel_enable_ipc(dev_priv);
enable_rpm_wakeref_asserts(dev_priv);
if (ret)
DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret);
else
DRM_DEBUG_KMS("Device resumed\n");
return ret;
}
const struct dev_pm_ops i915_pm_ops = {
/*
* S0ix (via system suspend) and S3 event handlers [PMSG_SUSPEND,
* PMSG_RESUME]
*/
.prepare = i915_pm_prepare,
.suspend = i915_pm_suspend,
.suspend_late = i915_pm_suspend_late,
.resume_early = i915_pm_resume_early,
.resume = i915_pm_resume,
/*
* S4 event handlers
* @freeze, @freeze_late : called (1) before creating the
* hibernation image [PMSG_FREEZE] and
* (2) after rebooting, before restoring
* the image [PMSG_QUIESCE]
* @thaw, @thaw_early : called (1) after creating the hibernation
* image, before writing it [PMSG_THAW]
* and (2) after failing to create or
* restore the image [PMSG_RECOVER]
* @poweroff, @poweroff_late: called after writing the hibernation
* image, before rebooting [PMSG_HIBERNATE]
* @restore, @restore_early : called after rebooting and restoring the
* hibernation image [PMSG_RESTORE]
*/
.freeze = i915_pm_freeze,
.freeze_late = i915_pm_freeze_late,
.thaw_early = i915_pm_thaw_early,
.thaw = i915_pm_thaw,
.poweroff = i915_pm_suspend,
.poweroff_late = i915_pm_poweroff_late,
.restore_early = i915_pm_restore_early,
.restore = i915_pm_restore,
/* S0ix (via runtime suspend) event handlers */
.runtime_suspend = intel_runtime_suspend,
.runtime_resume = intel_runtime_resume,
};
static const struct vm_operations_struct i915_gem_vm_ops = {
.fault = i915_gem_fault,
.open = drm_gem_vm_open,
.close = drm_gem_vm_close,
};
static const struct file_operations i915_driver_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
.mmap = drm_gem_mmap,
.poll = drm_poll,
.read = drm_read,
.compat_ioctl = i915_compat_ioctl,
.llseek = noop_llseek,
};
static int
i915_gem_reject_pin_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
return -ENODEV;
}
static const struct drm_ioctl_desc i915_ioctls[] = {
DRM_IOCTL_DEF_DRV(I915_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_FLUSH, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF_DRV(I915_FLIP, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_SETPARAM, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_ALLOC, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF_DRV(I915_FREE, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, drm_noop, DRM_AUTH),
DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_GEM_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer_ioctl, DRM_AUTH),
DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2_WR, i915_gem_execbuffer2_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_SET_CACHING, i915_gem_set_caching_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_GET_CACHING, i915_gem_get_caching_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id_ioctl, 0),
DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image_ioctl, DRM_MASTER),
DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs_ioctl, DRM_MASTER),
DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey_ioctl, DRM_MASTER),
DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, drm_noop, DRM_MASTER),
DRM_IOCTL_DEF_DRV(I915_GEM_WAIT, i915_gem_wait_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE_EXT, i915_gem_context_create_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY, i915_gem_context_destroy_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATS, i915_gem_context_reset_stats_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_USERPTR, i915_gem_userptr_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_GETPARAM, i915_gem_context_getparam_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_SETPARAM, i915_gem_context_setparam_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_PERF_OPEN, i915_perf_open_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_PERF_ADD_CONFIG, i915_perf_add_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_PERF_REMOVE_CONFIG, i915_perf_remove_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_QUERY, i915_query_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_VM_CREATE, i915_gem_vm_create_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_GEM_VM_DESTROY, i915_gem_vm_destroy_ioctl, DRM_RENDER_ALLOW),
};
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_GEM | DRIVER_PRIME |
DRIVER_RENDER | DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_SYNCOBJ,
.release = i915_driver_release,
.open = i915_driver_open,
.lastclose = i915_driver_lastclose,
.postclose = i915_driver_postclose,
.gem_close_object = i915_gem_close_object,
.gem_free_object_unlocked = i915_gem_free_object,
.gem_vm_ops = &i915_gem_vm_ops,
.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,
.ioctls = i915_ioctls,
.num_ioctls = ARRAY_SIZE(i915_ioctls),
.fops = &i915_driver_fops,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
.patchlevel = DRIVER_PATCHLEVEL,
};
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftests/mock_drm.c"
#endif
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