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linux_dsm_epyc7002/drivers/gpu/drm/i915/i915_irq.c
Chris Wilson 67b807a892 drm/i915: Delay disabling the user interrupt for breadcrumbs 
A significant cost in setting up a wait is the overhead of enabling the
interrupt. As we disable the interrupt whenever the queue of waiters is
empty, if we are frequently waiting on alternating batches, we end up
re-enabling the interrupt on a frequent basis. We do want to disable the
interrupt during normal operations as under high load it may add several
thousand interrupts/s - we have been known in the past to occupy whole
cores with our interrupt handler after accidentally leaving user
interrupts enabled. As a compromise, leave the interrupt enabled until
the next IRQ, or the system is idle. This gives a small window for a
waiter to keep the interrupt active and not be delayed by having to
re-enable the interrupt.

v2: Restore hangcheck/missed-irq detection for continuations
v3: Be more careful restoring the hangcheck timer after reset
v4: Be more careful restoring the fake irq after reset (if required!)
v5: Redo changes to intel_engine_wakeup()
v6: Factor out __intel_engine_wakeup()
v7: Improve commentary for declaring a missed wakeup

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170227205850.2828-4-chris@chris-wilson.co.uk
2017-02-27 21:57:23 +00:00

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/* i915_irq.c -- IRQ support for the I915 -*- 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.
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/sysrq.h>
#include <linux/slab.h>
#include <linux/circ_buf.h>
#include <drm/drmP.h>
#include <drm/i915_drm.h>
#include "i915_drv.h"
#include "i915_trace.h"
#include "intel_drv.h"
/**
* DOC: interrupt handling
*
* These functions provide the basic support for enabling and disabling the
* interrupt handling support. There's a lot more functionality in i915_irq.c
* and related files, but that will be described in separate chapters.
*/
static const u32 hpd_ilk[HPD_NUM_PINS] = {
[HPD_PORT_A] = DE_DP_A_HOTPLUG,
};
static const u32 hpd_ivb[HPD_NUM_PINS] = {
[HPD_PORT_A] = DE_DP_A_HOTPLUG_IVB,
};
static const u32 hpd_bdw[HPD_NUM_PINS] = {
[HPD_PORT_A] = GEN8_PORT_DP_A_HOTPLUG,
};
static const u32 hpd_ibx[HPD_NUM_PINS] = {
[HPD_CRT] = SDE_CRT_HOTPLUG,
[HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
[HPD_PORT_B] = SDE_PORTB_HOTPLUG,
[HPD_PORT_C] = SDE_PORTC_HOTPLUG,
[HPD_PORT_D] = SDE_PORTD_HOTPLUG
};
static const u32 hpd_cpt[HPD_NUM_PINS] = {
[HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
[HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
[HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
[HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
[HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT
};
static const u32 hpd_spt[HPD_NUM_PINS] = {
[HPD_PORT_A] = SDE_PORTA_HOTPLUG_SPT,
[HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
[HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
[HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT,
[HPD_PORT_E] = SDE_PORTE_HOTPLUG_SPT
};
static const u32 hpd_mask_i915[HPD_NUM_PINS] = {
[HPD_CRT] = CRT_HOTPLUG_INT_EN,
[HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
[HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
[HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
[HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
[HPD_PORT_D] = PORTD_HOTPLUG_INT_EN
};
static const u32 hpd_status_g4x[HPD_NUM_PINS] = {
[HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
[HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
[HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
[HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
[HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
[HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
};
static const u32 hpd_status_i915[HPD_NUM_PINS] = {
[HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
[HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
[HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
[HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
[HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
[HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
};
/* BXT hpd list */
static const u32 hpd_bxt[HPD_NUM_PINS] = {
[HPD_PORT_A] = BXT_DE_PORT_HP_DDIA,
[HPD_PORT_B] = BXT_DE_PORT_HP_DDIB,
[HPD_PORT_C] = BXT_DE_PORT_HP_DDIC
};
/* IIR can theoretically queue up two events. Be paranoid. */
#define GEN8_IRQ_RESET_NDX(type, which) do { \
I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
POSTING_READ(GEN8_##type##_IMR(which)); \
I915_WRITE(GEN8_##type##_IER(which), 0); \
I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
POSTING_READ(GEN8_##type##_IIR(which)); \
I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
POSTING_READ(GEN8_##type##_IIR(which)); \
} while (0)
#define GEN5_IRQ_RESET(type) do { \
I915_WRITE(type##IMR, 0xffffffff); \
POSTING_READ(type##IMR); \
I915_WRITE(type##IER, 0); \
I915_WRITE(type##IIR, 0xffffffff); \
POSTING_READ(type##IIR); \
I915_WRITE(type##IIR, 0xffffffff); \
POSTING_READ(type##IIR); \
} while (0)
/*
* We should clear IMR at preinstall/uninstall, and just check at postinstall.
*/
static void gen5_assert_iir_is_zero(struct drm_i915_private *dev_priv,
i915_reg_t reg)
{
u32 val = I915_READ(reg);
if (val == 0)
return;
WARN(1, "Interrupt register 0x%x is not zero: 0x%08x\n",
i915_mmio_reg_offset(reg), val);
I915_WRITE(reg, 0xffffffff);
POSTING_READ(reg);
I915_WRITE(reg, 0xffffffff);
POSTING_READ(reg);
}
#define GEN8_IRQ_INIT_NDX(type, which, imr_val, ier_val) do { \
gen5_assert_iir_is_zero(dev_priv, GEN8_##type##_IIR(which)); \
I915_WRITE(GEN8_##type##_IER(which), (ier_val)); \
I915_WRITE(GEN8_##type##_IMR(which), (imr_val)); \
POSTING_READ(GEN8_##type##_IMR(which)); \
} while (0)
#define GEN5_IRQ_INIT(type, imr_val, ier_val) do { \
gen5_assert_iir_is_zero(dev_priv, type##IIR); \
I915_WRITE(type##IER, (ier_val)); \
I915_WRITE(type##IMR, (imr_val)); \
POSTING_READ(type##IMR); \
} while (0)
static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
static void gen9_guc_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
/* For display hotplug interrupt */
static inline void
i915_hotplug_interrupt_update_locked(struct drm_i915_private *dev_priv,
uint32_t mask,
uint32_t bits)
{
uint32_t val;
assert_spin_locked(&dev_priv->irq_lock);
WARN_ON(bits & ~mask);
val = I915_READ(PORT_HOTPLUG_EN);
val &= ~mask;
val |= bits;
I915_WRITE(PORT_HOTPLUG_EN, val);
}
/**
* i915_hotplug_interrupt_update - update hotplug interrupt enable
* @dev_priv: driver private
* @mask: bits to update
* @bits: bits to enable
* NOTE: the HPD enable bits are modified both inside and outside
* of an interrupt context. To avoid that read-modify-write cycles
* interfer, these bits are protected by a spinlock. Since this
* function is usually not called from a context where the lock is
* held already, this function acquires the lock itself. A non-locking
* version is also available.
*/
void i915_hotplug_interrupt_update(struct drm_i915_private *dev_priv,
uint32_t mask,
uint32_t bits)
{
spin_lock_irq(&dev_priv->irq_lock);
i915_hotplug_interrupt_update_locked(dev_priv, mask, bits);
spin_unlock_irq(&dev_priv->irq_lock);
}
/**
* ilk_update_display_irq - update DEIMR
* @dev_priv: driver private
* @interrupt_mask: mask of interrupt bits to update
* @enabled_irq_mask: mask of interrupt bits to enable
*/
void ilk_update_display_irq(struct drm_i915_private *dev_priv,
uint32_t interrupt_mask,
uint32_t enabled_irq_mask)
{
uint32_t new_val;
assert_spin_locked(&dev_priv->irq_lock);
WARN_ON(enabled_irq_mask & ~interrupt_mask);
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return;
new_val = dev_priv->irq_mask;
new_val &= ~interrupt_mask;
new_val |= (~enabled_irq_mask & interrupt_mask);
if (new_val != dev_priv->irq_mask) {
dev_priv->irq_mask = new_val;
I915_WRITE(DEIMR, dev_priv->irq_mask);
POSTING_READ(DEIMR);
}
}
/**
* ilk_update_gt_irq - update GTIMR
* @dev_priv: driver private
* @interrupt_mask: mask of interrupt bits to update
* @enabled_irq_mask: mask of interrupt bits to enable
*/
static void ilk_update_gt_irq(struct drm_i915_private *dev_priv,
uint32_t interrupt_mask,
uint32_t enabled_irq_mask)
{
assert_spin_locked(&dev_priv->irq_lock);
WARN_ON(enabled_irq_mask & ~interrupt_mask);
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return;
dev_priv->gt_irq_mask &= ~interrupt_mask;
dev_priv->gt_irq_mask |= (~enabled_irq_mask & interrupt_mask);
I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
}
void gen5_enable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
{
ilk_update_gt_irq(dev_priv, mask, mask);
POSTING_READ_FW(GTIMR);
}
void gen5_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
{
ilk_update_gt_irq(dev_priv, mask, 0);
}
static i915_reg_t gen6_pm_iir(struct drm_i915_private *dev_priv)
{
return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IIR(2) : GEN6_PMIIR;
}
static i915_reg_t gen6_pm_imr(struct drm_i915_private *dev_priv)
{
return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IMR(2) : GEN6_PMIMR;
}
static i915_reg_t gen6_pm_ier(struct drm_i915_private *dev_priv)
{
return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IER(2) : GEN6_PMIER;
}
/**
* snb_update_pm_irq - update GEN6_PMIMR
* @dev_priv: driver private
* @interrupt_mask: mask of interrupt bits to update
* @enabled_irq_mask: mask of interrupt bits to enable
*/
static void snb_update_pm_irq(struct drm_i915_private *dev_priv,
uint32_t interrupt_mask,
uint32_t enabled_irq_mask)
{
uint32_t new_val;
WARN_ON(enabled_irq_mask & ~interrupt_mask);
assert_spin_locked(&dev_priv->irq_lock);
new_val = dev_priv->pm_imr;
new_val &= ~interrupt_mask;
new_val |= (~enabled_irq_mask & interrupt_mask);
if (new_val != dev_priv->pm_imr) {
dev_priv->pm_imr = new_val;
I915_WRITE(gen6_pm_imr(dev_priv), dev_priv->pm_imr);
POSTING_READ(gen6_pm_imr(dev_priv));
}
}
void gen6_unmask_pm_irq(struct drm_i915_private *dev_priv, u32 mask)
{
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return;
snb_update_pm_irq(dev_priv, mask, mask);
}
static void __gen6_mask_pm_irq(struct drm_i915_private *dev_priv, u32 mask)
{
snb_update_pm_irq(dev_priv, mask, 0);
}
void gen6_mask_pm_irq(struct drm_i915_private *dev_priv, u32 mask)
{
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return;
__gen6_mask_pm_irq(dev_priv, mask);
}
void gen6_reset_pm_iir(struct drm_i915_private *dev_priv, u32 reset_mask)
{
i915_reg_t reg = gen6_pm_iir(dev_priv);
assert_spin_locked(&dev_priv->irq_lock);
I915_WRITE(reg, reset_mask);
I915_WRITE(reg, reset_mask);
POSTING_READ(reg);
}
void gen6_enable_pm_irq(struct drm_i915_private *dev_priv, u32 enable_mask)
{
assert_spin_locked(&dev_priv->irq_lock);
dev_priv->pm_ier |= enable_mask;
I915_WRITE(gen6_pm_ier(dev_priv), dev_priv->pm_ier);
gen6_unmask_pm_irq(dev_priv, enable_mask);
/* unmask_pm_irq provides an implicit barrier (POSTING_READ) */
}
void gen6_disable_pm_irq(struct drm_i915_private *dev_priv, u32 disable_mask)
{
assert_spin_locked(&dev_priv->irq_lock);
dev_priv->pm_ier &= ~disable_mask;
__gen6_mask_pm_irq(dev_priv, disable_mask);
I915_WRITE(gen6_pm_ier(dev_priv), dev_priv->pm_ier);
/* though a barrier is missing here, but don't really need a one */
}
void gen6_reset_rps_interrupts(struct drm_i915_private *dev_priv)
{
spin_lock_irq(&dev_priv->irq_lock);
gen6_reset_pm_iir(dev_priv, dev_priv->pm_rps_events);
dev_priv->rps.pm_iir = 0;
spin_unlock_irq(&dev_priv->irq_lock);
}
void gen6_enable_rps_interrupts(struct drm_i915_private *dev_priv)
{
if (READ_ONCE(dev_priv->rps.interrupts_enabled))
return;
spin_lock_irq(&dev_priv->irq_lock);
WARN_ON_ONCE(dev_priv->rps.pm_iir);
WARN_ON_ONCE(I915_READ(gen6_pm_iir(dev_priv)) & dev_priv->pm_rps_events);
dev_priv->rps.interrupts_enabled = true;
gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
spin_unlock_irq(&dev_priv->irq_lock);
}
u32 gen6_sanitize_rps_pm_mask(struct drm_i915_private *dev_priv, u32 mask)
{
return (mask & ~dev_priv->rps.pm_intr_keep);
}
void gen6_disable_rps_interrupts(struct drm_i915_private *dev_priv)
{
if (!READ_ONCE(dev_priv->rps.interrupts_enabled))
return;
spin_lock_irq(&dev_priv->irq_lock);
dev_priv->rps.interrupts_enabled = false;
I915_WRITE(GEN6_PMINTRMSK, gen6_sanitize_rps_pm_mask(dev_priv, ~0u));
gen6_disable_pm_irq(dev_priv, dev_priv->pm_rps_events);
spin_unlock_irq(&dev_priv->irq_lock);
synchronize_irq(dev_priv->drm.irq);
/* Now that we will not be generating any more work, flush any
* outsanding tasks. As we are called on the RPS idle path,
* we will reset the GPU to minimum frequencies, so the current
* state of the worker can be discarded.
*/
cancel_work_sync(&dev_priv->rps.work);
gen6_reset_rps_interrupts(dev_priv);
}
void gen9_reset_guc_interrupts(struct drm_i915_private *dev_priv)
{
spin_lock_irq(&dev_priv->irq_lock);
gen6_reset_pm_iir(dev_priv, dev_priv->pm_guc_events);
spin_unlock_irq(&dev_priv->irq_lock);
}
void gen9_enable_guc_interrupts(struct drm_i915_private *dev_priv)
{
spin_lock_irq(&dev_priv->irq_lock);
if (!dev_priv->guc.interrupts_enabled) {
WARN_ON_ONCE(I915_READ(gen6_pm_iir(dev_priv)) &
dev_priv->pm_guc_events);
dev_priv->guc.interrupts_enabled = true;
gen6_enable_pm_irq(dev_priv, dev_priv->pm_guc_events);
}
spin_unlock_irq(&dev_priv->irq_lock);
}
void gen9_disable_guc_interrupts(struct drm_i915_private *dev_priv)
{
spin_lock_irq(&dev_priv->irq_lock);
dev_priv->guc.interrupts_enabled = false;
gen6_disable_pm_irq(dev_priv, dev_priv->pm_guc_events);
spin_unlock_irq(&dev_priv->irq_lock);
synchronize_irq(dev_priv->drm.irq);
gen9_reset_guc_interrupts(dev_priv);
}
/**
* bdw_update_port_irq - update DE port interrupt
* @dev_priv: driver private
* @interrupt_mask: mask of interrupt bits to update
* @enabled_irq_mask: mask of interrupt bits to enable
*/
static void bdw_update_port_irq(struct drm_i915_private *dev_priv,
uint32_t interrupt_mask,
uint32_t enabled_irq_mask)
{
uint32_t new_val;
uint32_t old_val;
assert_spin_locked(&dev_priv->irq_lock);
WARN_ON(enabled_irq_mask & ~interrupt_mask);
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return;
old_val = I915_READ(GEN8_DE_PORT_IMR);
new_val = old_val;
new_val &= ~interrupt_mask;
new_val |= (~enabled_irq_mask & interrupt_mask);
if (new_val != old_val) {
I915_WRITE(GEN8_DE_PORT_IMR, new_val);
POSTING_READ(GEN8_DE_PORT_IMR);
}
}
/**
* bdw_update_pipe_irq - update DE pipe interrupt
* @dev_priv: driver private
* @pipe: pipe whose interrupt to update
* @interrupt_mask: mask of interrupt bits to update
* @enabled_irq_mask: mask of interrupt bits to enable
*/
void bdw_update_pipe_irq(struct drm_i915_private *dev_priv,
enum pipe pipe,
uint32_t interrupt_mask,
uint32_t enabled_irq_mask)
{
uint32_t new_val;
assert_spin_locked(&dev_priv->irq_lock);
WARN_ON(enabled_irq_mask & ~interrupt_mask);
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return;
new_val = dev_priv->de_irq_mask[pipe];
new_val &= ~interrupt_mask;
new_val |= (~enabled_irq_mask & interrupt_mask);
if (new_val != dev_priv->de_irq_mask[pipe]) {
dev_priv->de_irq_mask[pipe] = new_val;
I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
}
}
/**
* ibx_display_interrupt_update - update SDEIMR
* @dev_priv: driver private
* @interrupt_mask: mask of interrupt bits to update
* @enabled_irq_mask: mask of interrupt bits to enable
*/
void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
uint32_t interrupt_mask,
uint32_t enabled_irq_mask)
{
uint32_t sdeimr = I915_READ(SDEIMR);
sdeimr &= ~interrupt_mask;
sdeimr |= (~enabled_irq_mask & interrupt_mask);
WARN_ON(enabled_irq_mask & ~interrupt_mask);
assert_spin_locked(&dev_priv->irq_lock);
if (WARN_ON(!intel_irqs_enabled(dev_priv)))
return;
I915_WRITE(SDEIMR, sdeimr);
POSTING_READ(SDEIMR);
}
static void
__i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
u32 enable_mask, u32 status_mask)
{
i915_reg_t reg = PIPESTAT(pipe);
u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK;
assert_spin_locked(&dev_priv->irq_lock);
WARN_ON(!intel_irqs_enabled(dev_priv));
if (WARN_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
status_mask & ~PIPESTAT_INT_STATUS_MASK,
"pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
pipe_name(pipe), enable_mask, status_mask))
return;
if ((pipestat & enable_mask) == enable_mask)
return;
dev_priv->pipestat_irq_mask[pipe] |= status_mask;
/* Enable the interrupt, clear any pending status */
pipestat |= enable_mask | status_mask;
I915_WRITE(reg, pipestat);
POSTING_READ(reg);
}
static void
__i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
u32 enable_mask, u32 status_mask)
{
i915_reg_t reg = PIPESTAT(pipe);
u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK;
assert_spin_locked(&dev_priv->irq_lock);
WARN_ON(!intel_irqs_enabled(dev_priv));
if (WARN_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
status_mask & ~PIPESTAT_INT_STATUS_MASK,
"pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
pipe_name(pipe), enable_mask, status_mask))
return;
if ((pipestat & enable_mask) == 0)
return;
dev_priv->pipestat_irq_mask[pipe] &= ~status_mask;
pipestat &= ~enable_mask;
I915_WRITE(reg, pipestat);
POSTING_READ(reg);
}
static u32 vlv_get_pipestat_enable_mask(struct drm_device *dev, u32 status_mask)
{
u32 enable_mask = status_mask << 16;
/*
* On pipe A we don't support the PSR interrupt yet,
* on pipe B and C the same bit MBZ.
*/
if (WARN_ON_ONCE(status_mask & PIPE_A_PSR_STATUS_VLV))
return 0;
/*
* On pipe B and C we don't support the PSR interrupt yet, on pipe
* A the same bit is for perf counters which we don't use either.
*/
if (WARN_ON_ONCE(status_mask & PIPE_B_PSR_STATUS_VLV))
return 0;
enable_mask &= ~(PIPE_FIFO_UNDERRUN_STATUS |
SPRITE0_FLIP_DONE_INT_EN_VLV |
SPRITE1_FLIP_DONE_INT_EN_VLV);
if (status_mask & SPRITE0_FLIP_DONE_INT_STATUS_VLV)
enable_mask |= SPRITE0_FLIP_DONE_INT_EN_VLV;
if (status_mask & SPRITE1_FLIP_DONE_INT_STATUS_VLV)
enable_mask |= SPRITE1_FLIP_DONE_INT_EN_VLV;
return enable_mask;
}
void
i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
u32 status_mask)
{
u32 enable_mask;
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
enable_mask = vlv_get_pipestat_enable_mask(&dev_priv->drm,
status_mask);
else
enable_mask = status_mask << 16;
__i915_enable_pipestat(dev_priv, pipe, enable_mask, status_mask);
}
void
i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
u32 status_mask)
{
u32 enable_mask;
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
enable_mask = vlv_get_pipestat_enable_mask(&dev_priv->drm,
status_mask);
else
enable_mask = status_mask << 16;
__i915_disable_pipestat(dev_priv, pipe, enable_mask, status_mask);
}
/**
* i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
* @dev_priv: i915 device private
*/
static void i915_enable_asle_pipestat(struct drm_i915_private *dev_priv)
{
if (!dev_priv->opregion.asle || !IS_MOBILE(dev_priv))
return;
spin_lock_irq(&dev_priv->irq_lock);
i915_enable_pipestat(dev_priv, PIPE_B, PIPE_LEGACY_BLC_EVENT_STATUS);
if (INTEL_GEN(dev_priv) >= 4)
i915_enable_pipestat(dev_priv, PIPE_A,
PIPE_LEGACY_BLC_EVENT_STATUS);
spin_unlock_irq(&dev_priv->irq_lock);
}
/*
* This timing diagram depicts the video signal in and
* around the vertical blanking period.
*
* Assumptions about the fictitious mode used in this example:
* vblank_start >= 3
* vsync_start = vblank_start + 1
* vsync_end = vblank_start + 2
* vtotal = vblank_start + 3
*
* start of vblank:
* latch double buffered registers
* increment frame counter (ctg+)
* generate start of vblank interrupt (gen4+)
* |
* | frame start:
* | generate frame start interrupt (aka. vblank interrupt) (gmch)
* | may be shifted forward 1-3 extra lines via PIPECONF
* | |
* | | start of vsync:
* | | generate vsync interrupt
* | | |
* ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx
* . \hs/ . \hs/ \hs/ \hs/ . \hs/
* ----va---> <-----------------vb--------------------> <--------va-------------
* | | <----vs-----> |
* -vbs-----> <---vbs+1---> <---vbs+2---> <-----0-----> <-----1-----> <-----2--- (scanline counter gen2)
* -vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2---> <-----0--- (scanline counter gen3+)
* -vbs-2---> <---vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2- (scanline counter hsw+ hdmi)
* | | |
* last visible pixel first visible pixel
* | increment frame counter (gen3/4)
* pixel counter = vblank_start * htotal pixel counter = 0 (gen3/4)
*
* x = horizontal active
* _ = horizontal blanking
* hs = horizontal sync
* va = vertical active
* vb = vertical blanking
* vs = vertical sync
* vbs = vblank_start (number)
*
* Summary:
* - most events happen at the start of horizontal sync
* - frame start happens at the start of horizontal blank, 1-4 lines
* (depending on PIPECONF settings) after the start of vblank
* - gen3/4 pixel and frame counter are synchronized with the start
* of horizontal active on the first line of vertical active
*/
/* Called from drm generic code, passed a 'crtc', which
* we use as a pipe index
*/
static u32 i915_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
{
struct drm_i915_private *dev_priv = to_i915(dev);
i915_reg_t high_frame, low_frame;
u32 high1, high2, low, pixel, vbl_start, hsync_start, htotal;
struct intel_crtc *intel_crtc = intel_get_crtc_for_pipe(dev_priv,
pipe);
const struct drm_display_mode *mode = &intel_crtc->base.hwmode;
htotal = mode->crtc_htotal;
hsync_start = mode->crtc_hsync_start;
vbl_start = mode->crtc_vblank_start;
if (mode->flags & DRM_MODE_FLAG_INTERLACE)
vbl_start = DIV_ROUND_UP(vbl_start, 2);
/* Convert to pixel count */
vbl_start *= htotal;
/* Start of vblank event occurs at start of hsync */
vbl_start -= htotal - hsync_start;
high_frame = PIPEFRAME(pipe);
low_frame = PIPEFRAMEPIXEL(pipe);
/*
* High & low register fields aren't synchronized, so make sure
* we get a low value that's stable across two reads of the high
* register.
*/
do {
high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
low = I915_READ(low_frame);
high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
} while (high1 != high2);
high1 >>= PIPE_FRAME_HIGH_SHIFT;
pixel = low & PIPE_PIXEL_MASK;
low >>= PIPE_FRAME_LOW_SHIFT;
/*
* The frame counter increments at beginning of active.
* Cook up a vblank counter by also checking the pixel
* counter against vblank start.
*/
return (((high1 << 8) | low) + (pixel >= vbl_start)) & 0xffffff;
}
static u32 g4x_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
{
struct drm_i915_private *dev_priv = to_i915(dev);
return I915_READ(PIPE_FRMCOUNT_G4X(pipe));
}
/* I915_READ_FW, only for fast reads of display block, no need for forcewake etc. */
static int __intel_get_crtc_scanline(struct intel_crtc *crtc)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
const struct drm_display_mode *mode = &crtc->base.hwmode;
enum pipe pipe = crtc->pipe;
int position, vtotal;
vtotal = mode->crtc_vtotal;
if (mode->flags & DRM_MODE_FLAG_INTERLACE)
vtotal /= 2;
if (IS_GEN2(dev_priv))
position = I915_READ_FW(PIPEDSL(pipe)) & DSL_LINEMASK_GEN2;
else
position = I915_READ_FW(PIPEDSL(pipe)) & DSL_LINEMASK_GEN3;
/*
* On HSW, the DSL reg (0x70000) appears to return 0 if we
* read it just before the start of vblank. So try it again
* so we don't accidentally end up spanning a vblank frame
* increment, causing the pipe_update_end() code to squak at us.
*
* The nature of this problem means we can't simply check the ISR
* bit and return the vblank start value; nor can we use the scanline
* debug register in the transcoder as it appears to have the same
* problem. We may need to extend this to include other platforms,
* but so far testing only shows the problem on HSW.
*/
if (HAS_DDI(dev_priv) && !position) {
int i, temp;
for (i = 0; i < 100; i++) {
udelay(1);
temp = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) &
DSL_LINEMASK_GEN3;
if (temp != position) {
position = temp;
break;
}
}
}
/*
* See update_scanline_offset() for the details on the
* scanline_offset adjustment.
*/
return (position + crtc->scanline_offset) % vtotal;
}
static int i915_get_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe,
unsigned int flags, int *vpos, int *hpos,
ktime_t *stime, ktime_t *etime,
const struct drm_display_mode *mode)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_crtc *intel_crtc = intel_get_crtc_for_pipe(dev_priv,
pipe);
int position;
int vbl_start, vbl_end, hsync_start, htotal, vtotal;
bool in_vbl = true;
int ret = 0;
unsigned long irqflags;
if (WARN_ON(!mode->crtc_clock)) {
DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
"pipe %c\n", pipe_name(pipe));
return 0;
}
htotal = mode->crtc_htotal;
hsync_start = mode->crtc_hsync_start;
vtotal = mode->crtc_vtotal;
vbl_start = mode->crtc_vblank_start;
vbl_end = mode->crtc_vblank_end;
if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
vbl_start = DIV_ROUND_UP(vbl_start, 2);
vbl_end /= 2;
vtotal /= 2;
}
ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
/*
* Lock uncore.lock, as we will do multiple timing critical raw
* register reads, potentially with preemption disabled, so the
* following code must not block on uncore.lock.
*/
spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
/* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
/* Get optional system timestamp before query. */
if (stime)
*stime = ktime_get();
if (IS_GEN2(dev_priv) || IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5) {
/* No obvious pixelcount register. Only query vertical
* scanout position from Display scan line register.
*/
position = __intel_get_crtc_scanline(intel_crtc);
} else {
/* Have access to pixelcount since start of frame.
* We can split this into vertical and horizontal
* scanout position.
*/
position = (I915_READ_FW(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
/* convert to pixel counts */
vbl_start *= htotal;
vbl_end *= htotal;
vtotal *= htotal;
/*
* In interlaced modes, the pixel counter counts all pixels,
* so one field will have htotal more pixels. In order to avoid
* the reported position from jumping backwards when the pixel
* counter is beyond the length of the shorter field, just
* clamp the position the length of the shorter field. This
* matches how the scanline counter based position works since
* the scanline counter doesn't count the two half lines.
*/
if (position >= vtotal)
position = vtotal - 1;
/*
* Start of vblank interrupt is triggered at start of hsync,
* just prior to the first active line of vblank. However we
* consider lines to start at the leading edge of horizontal
* active. So, should we get here before we've crossed into
* the horizontal active of the first line in vblank, we would
* not set the DRM_SCANOUTPOS_INVBL flag. In order to fix that,
* always add htotal-hsync_start to the current pixel position.
*/
position = (position + htotal - hsync_start) % vtotal;
}
/* Get optional system timestamp after query. */
if (etime)
*etime = ktime_get();
/* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
in_vbl = position >= vbl_start && position < vbl_end;
/*
* While in vblank, position will be negative
* counting up towards 0 at vbl_end. And outside
* vblank, position will be positive counting
* up since vbl_end.
*/
if (position >= vbl_start)
position -= vbl_end;
else
position += vtotal - vbl_end;
if (IS_GEN2(dev_priv) || IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5) {
*vpos = position;
*hpos = 0;
} else {
*vpos = position / htotal;
*hpos = position - (*vpos * htotal);
}
/* In vblank? */
if (in_vbl)
ret |= DRM_SCANOUTPOS_IN_VBLANK;
return ret;
}
int intel_get_crtc_scanline(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
unsigned long irqflags;
int position;
spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
position = __intel_get_crtc_scanline(crtc);
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
return position;
}
static int i915_get_vblank_timestamp(struct drm_device *dev, unsigned int pipe,
int *max_error,
struct timeval *vblank_time,
unsigned flags)
{
struct drm_i915_private *dev_priv = to_i915(dev);
struct intel_crtc *crtc;
if (pipe >= INTEL_INFO(dev_priv)->num_pipes) {
DRM_ERROR("Invalid crtc %u\n", pipe);
return -EINVAL;
}
/* Get drm_crtc to timestamp: */
crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
if (crtc == NULL) {
DRM_ERROR("Invalid crtc %u\n", pipe);
return -EINVAL;
}
if (!crtc->base.hwmode.crtc_clock) {
DRM_DEBUG_KMS("crtc %u is disabled\n", pipe);
return -EBUSY;
}
/* Helper routine in DRM core does all the work: */
return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
vblank_time, flags,
&crtc->base.hwmode);
}
static void ironlake_rps_change_irq_handler(struct drm_i915_private *dev_priv)
{
u32 busy_up, busy_down, max_avg, min_avg;
u8 new_delay;
spin_lock(&mchdev_lock);
I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
new_delay = dev_priv->ips.cur_delay;
I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
busy_up = I915_READ(RCPREVBSYTUPAVG);
busy_down = I915_READ(RCPREVBSYTDNAVG);
max_avg = I915_READ(RCBMAXAVG);
min_avg = I915_READ(RCBMINAVG);
/* Handle RCS change request from hw */
if (busy_up > max_avg) {
if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
new_delay = dev_priv->ips.cur_delay - 1;
if (new_delay < dev_priv->ips.max_delay)
new_delay = dev_priv->ips.max_delay;
} else if (busy_down < min_avg) {
if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
new_delay = dev_priv->ips.cur_delay + 1;
if (new_delay > dev_priv->ips.min_delay)
new_delay = dev_priv->ips.min_delay;
}
if (ironlake_set_drps(dev_priv, new_delay))
dev_priv->ips.cur_delay = new_delay;
spin_unlock(&mchdev_lock);
return;
}
static void notify_ring(struct intel_engine_cs *engine)
{
struct drm_i915_gem_request *rq = NULL;
struct intel_wait *wait;
atomic_inc(&engine->irq_count);
set_bit(ENGINE_IRQ_BREADCRUMB, &engine->irq_posted);
rcu_read_lock();
spin_lock(&engine->breadcrumbs.lock);
wait = engine->breadcrumbs.first_wait;
if (wait) {
/* We use a callback from the dma-fence to submit
* requests after waiting on our own requests. To
* ensure minimum delay in queuing the next request to
* hardware, signal the fence now rather than wait for
* the signaler to be woken up. We still wake up the
* waiter in order to handle the irq-seqno coherency
* issues (we may receive the interrupt before the
* seqno is written, see __i915_request_irq_complete())
* and to handle coalescing of multiple seqno updates
* and many waiters.
*/
if (i915_seqno_passed(intel_engine_get_seqno(engine),
wait->seqno))
rq = wait->request;
wake_up_process(wait->tsk);
} else {
__intel_engine_disarm_breadcrumbs(engine);
}
spin_unlock(&engine->breadcrumbs.lock);
if (rq)
dma_fence_signal(&rq->fence);
rcu_read_unlock();
trace_intel_engine_notify(engine, wait);
}
static void vlv_c0_read(struct drm_i915_private *dev_priv,
struct intel_rps_ei *ei)
{
ei->cz_clock = vlv_punit_read(dev_priv, PUNIT_REG_CZ_TIMESTAMP);
ei->render_c0 = I915_READ(VLV_RENDER_C0_COUNT);
ei->media_c0 = I915_READ(VLV_MEDIA_C0_COUNT);
}
static bool vlv_c0_above(struct drm_i915_private *dev_priv,
const struct intel_rps_ei *old,
const struct intel_rps_ei *now,
int threshold)
{
u64 time, c0;
unsigned int mul = 100;
if (old->cz_clock == 0)
return false;
if (I915_READ(VLV_COUNTER_CONTROL) & VLV_COUNT_RANGE_HIGH)
mul <<= 8;
time = now->cz_clock - old->cz_clock;
time *= threshold * dev_priv->czclk_freq;
/* Workload can be split between render + media, e.g. SwapBuffers
* being blitted in X after being rendered in mesa. To account for
* this we need to combine both engines into our activity counter.
*/
c0 = now->render_c0 - old->render_c0;
c0 += now->media_c0 - old->media_c0;
c0 *= mul * VLV_CZ_CLOCK_TO_MILLI_SEC;
return c0 >= time;
}
void gen6_rps_reset_ei(struct drm_i915_private *dev_priv)
{
vlv_c0_read(dev_priv, &dev_priv->rps.down_ei);
dev_priv->rps.up_ei = dev_priv->rps.down_ei;
}
static u32 vlv_wa_c0_ei(struct drm_i915_private *dev_priv, u32 pm_iir)
{
struct intel_rps_ei now;
u32 events = 0;
if ((pm_iir & (GEN6_PM_RP_DOWN_EI_EXPIRED | GEN6_PM_RP_UP_EI_EXPIRED)) == 0)
return 0;
vlv_c0_read(dev_priv, &now);
if (now.cz_clock == 0)
return 0;
if (pm_iir & GEN6_PM_RP_DOWN_EI_EXPIRED) {
if (!vlv_c0_above(dev_priv,
&dev_priv->rps.down_ei, &now,
dev_priv->rps.down_threshold))
events |= GEN6_PM_RP_DOWN_THRESHOLD;
dev_priv->rps.down_ei = now;
}
if (pm_iir & GEN6_PM_RP_UP_EI_EXPIRED) {
if (vlv_c0_above(dev_priv,
&dev_priv->rps.up_ei, &now,
dev_priv->rps.up_threshold))
events |= GEN6_PM_RP_UP_THRESHOLD;
dev_priv->rps.up_ei = now;
}
return events;
}
static bool any_waiters(struct drm_i915_private *dev_priv)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
for_each_engine(engine, dev_priv, id)
if (intel_engine_has_waiter(engine))
return true;
return false;
}
static void gen6_pm_rps_work(struct work_struct *work)
{
struct drm_i915_private *dev_priv =
container_of(work, struct drm_i915_private, rps.work);
bool client_boost;
int new_delay, adj, min, max;
u32 pm_iir;
spin_lock_irq(&dev_priv->irq_lock);
/* Speed up work cancelation during disabling rps interrupts. */
if (!dev_priv->rps.interrupts_enabled) {
spin_unlock_irq(&dev_priv->irq_lock);
return;
}
pm_iir = dev_priv->rps.pm_iir;
dev_priv->rps.pm_iir = 0;
/* Make sure not to corrupt PMIMR state used by ringbuffer on GEN6 */
gen6_unmask_pm_irq(dev_priv, dev_priv->pm_rps_events);
client_boost = dev_priv->rps.client_boost;
dev_priv->rps.client_boost = false;
spin_unlock_irq(&dev_priv->irq_lock);
/* Make sure we didn't queue anything we're not going to process. */
WARN_ON(pm_iir & ~dev_priv->pm_rps_events);
if ((pm_iir & dev_priv->pm_rps_events) == 0 && !client_boost)
return;
mutex_lock(&dev_priv->rps.hw_lock);
pm_iir |= vlv_wa_c0_ei(dev_priv, pm_iir);
adj = dev_priv->rps.last_adj;
new_delay = dev_priv->rps.cur_freq;
min = dev_priv->rps.min_freq_softlimit;
max = dev_priv->rps.max_freq_softlimit;
if (client_boost || any_waiters(dev_priv))
max = dev_priv->rps.max_freq;
if (client_boost && new_delay < dev_priv->rps.boost_freq) {
new_delay = dev_priv->rps.boost_freq;
adj = 0;
} else if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
if (adj > 0)
adj *= 2;
else /* CHV needs even encode values */
adj = IS_CHERRYVIEW(dev_priv) ? 2 : 1;
if (new_delay >= dev_priv->rps.max_freq_softlimit)
adj = 0;
} else if (client_boost || any_waiters(dev_priv)) {
adj = 0;
} else if (pm_iir & GEN6_PM_RP_DOWN_TIMEOUT) {
if (dev_priv->rps.cur_freq > dev_priv->rps.efficient_freq)
new_delay = dev_priv->rps.efficient_freq;
else if (dev_priv->rps.cur_freq > dev_priv->rps.min_freq_softlimit)
new_delay = dev_priv->rps.min_freq_softlimit;
adj = 0;
} else if (pm_iir & GEN6_PM_RP_DOWN_THRESHOLD) {
if (adj < 0)
adj *= 2;
else /* CHV needs even encode values */
adj = IS_CHERRYVIEW(dev_priv) ? -2 : -1;
if (new_delay <= dev_priv->rps.min_freq_softlimit)
adj = 0;
} else { /* unknown event */
adj = 0;
}
dev_priv->rps.last_adj = adj;
/* sysfs frequency interfaces may have snuck in while servicing the
* interrupt
*/
new_delay += adj;
new_delay = clamp_t(int, new_delay, min, max);
if (intel_set_rps(dev_priv, new_delay)) {
DRM_DEBUG_DRIVER("Failed to set new GPU frequency\n");
dev_priv->rps.last_adj = 0;
}
mutex_unlock(&dev_priv->rps.hw_lock);
}
/**
* ivybridge_parity_work - Workqueue called when a parity error interrupt
* occurred.
* @work: workqueue struct
*
* Doesn't actually do anything except notify userspace. As a consequence of
* this event, userspace should try to remap the bad rows since statistically
* it is likely the same row is more likely to go bad again.
*/
static void ivybridge_parity_work(struct work_struct *work)
{
struct drm_i915_private *dev_priv =
container_of(work, struct drm_i915_private, l3_parity.error_work);
u32 error_status, row, bank, subbank;
char *parity_event[6];
uint32_t misccpctl;
uint8_t slice = 0;
/* We must turn off DOP level clock gating to access the L3 registers.
* In order to prevent a get/put style interface, acquire struct mutex
* any time we access those registers.
*/
mutex_lock(&dev_priv->drm.struct_mutex);
/* If we've screwed up tracking, just let the interrupt fire again */
if (WARN_ON(!dev_priv->l3_parity.which_slice))
goto out;
misccpctl = I915_READ(GEN7_MISCCPCTL);
I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
POSTING_READ(GEN7_MISCCPCTL);
while ((slice = ffs(dev_priv->l3_parity.which_slice)) != 0) {
i915_reg_t reg;
slice--;
if (WARN_ON_ONCE(slice >= NUM_L3_SLICES(dev_priv)))
break;
dev_priv->l3_parity.which_slice &= ~(1<<slice);
reg = GEN7_L3CDERRST1(slice);
error_status = I915_READ(reg);
row = GEN7_PARITY_ERROR_ROW(error_status);
bank = GEN7_PARITY_ERROR_BANK(error_status);
subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
I915_WRITE(reg, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE);
POSTING_READ(reg);
parity_event[0] = I915_L3_PARITY_UEVENT "=1";
parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
parity_event[4] = kasprintf(GFP_KERNEL, "SLICE=%d", slice);
parity_event[5] = NULL;
kobject_uevent_env(&dev_priv->drm.primary->kdev->kobj,
KOBJ_CHANGE, parity_event);
DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n",
slice, row, bank, subbank);
kfree(parity_event[4]);
kfree(parity_event[3]);
kfree(parity_event[2]);
kfree(parity_event[1]);
}
I915_WRITE(GEN7_MISCCPCTL, misccpctl);
out:
WARN_ON(dev_priv->l3_parity.which_slice);
spin_lock_irq(&dev_priv->irq_lock);
gen5_enable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv));
spin_unlock_irq(&dev_priv->irq_lock);
mutex_unlock(&dev_priv->drm.struct_mutex);
}
static void ivybridge_parity_error_irq_handler(struct drm_i915_private *dev_priv,
u32 iir)
{
if (!HAS_L3_DPF(dev_priv))
return;
spin_lock(&dev_priv->irq_lock);
gen5_disable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv));
spin_unlock(&dev_priv->irq_lock);
iir &= GT_PARITY_ERROR(dev_priv);
if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1)
dev_priv->l3_parity.which_slice |= 1 << 1;
if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
dev_priv->l3_parity.which_slice |= 1 << 0;
queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
}
static void ilk_gt_irq_handler(struct drm_i915_private *dev_priv,
u32 gt_iir)
{
if (gt_iir & GT_RENDER_USER_INTERRUPT)
notify_ring(dev_priv->engine[RCS]);
if (gt_iir & ILK_BSD_USER_INTERRUPT)
notify_ring(dev_priv->engine[VCS]);
}
static void snb_gt_irq_handler(struct drm_i915_private *dev_priv,
u32 gt_iir)
{
if (gt_iir & GT_RENDER_USER_INTERRUPT)
notify_ring(dev_priv->engine[RCS]);
if (gt_iir & GT_BSD_USER_INTERRUPT)
notify_ring(dev_priv->engine[VCS]);
if (gt_iir & GT_BLT_USER_INTERRUPT)
notify_ring(dev_priv->engine[BCS]);
if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
GT_BSD_CS_ERROR_INTERRUPT |
GT_RENDER_CS_MASTER_ERROR_INTERRUPT))
DRM_DEBUG("Command parser error, gt_iir 0x%08x\n", gt_iir);
if (gt_iir & GT_PARITY_ERROR(dev_priv))
ivybridge_parity_error_irq_handler(dev_priv, gt_iir);
}
static __always_inline void
gen8_cs_irq_handler(struct intel_engine_cs *engine, u32 iir, int test_shift)
{
if (iir & (GT_RENDER_USER_INTERRUPT << test_shift))
notify_ring(engine);
if (iir & (GT_CONTEXT_SWITCH_INTERRUPT << test_shift)) {
set_bit(ENGINE_IRQ_EXECLIST, &engine->irq_posted);
tasklet_hi_schedule(&engine->irq_tasklet);
}
}
static irqreturn_t gen8_gt_irq_ack(struct drm_i915_private *dev_priv,
u32 master_ctl,
u32 gt_iir[4])
{
irqreturn_t ret = IRQ_NONE;
if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
gt_iir[0] = I915_READ_FW(GEN8_GT_IIR(0));
if (gt_iir[0]) {
I915_WRITE_FW(GEN8_GT_IIR(0), gt_iir[0]);
ret = IRQ_HANDLED;
} else
DRM_ERROR("The master control interrupt lied (GT0)!\n");
}
if (master_ctl & (GEN8_GT_VCS1_IRQ | GEN8_GT_VCS2_IRQ)) {
gt_iir[1] = I915_READ_FW(GEN8_GT_IIR(1));
if (gt_iir[1]) {
I915_WRITE_FW(GEN8_GT_IIR(1), gt_iir[1]);
ret = IRQ_HANDLED;
} else
DRM_ERROR("The master control interrupt lied (GT1)!\n");
}
if (master_ctl & GEN8_GT_VECS_IRQ) {
gt_iir[3] = I915_READ_FW(GEN8_GT_IIR(3));
if (gt_iir[3]) {
I915_WRITE_FW(GEN8_GT_IIR(3), gt_iir[3]);
ret = IRQ_HANDLED;
} else
DRM_ERROR("The master control interrupt lied (GT3)!\n");
}
if (master_ctl & (GEN8_GT_PM_IRQ | GEN8_GT_GUC_IRQ)) {
gt_iir[2] = I915_READ_FW(GEN8_GT_IIR(2));
if (gt_iir[2] & (dev_priv->pm_rps_events |
dev_priv->pm_guc_events)) {
I915_WRITE_FW(GEN8_GT_IIR(2),
gt_iir[2] & (dev_priv->pm_rps_events |
dev_priv->pm_guc_events));
ret = IRQ_HANDLED;
} else
DRM_ERROR("The master control interrupt lied (PM)!\n");
}
return ret;
}
static void gen8_gt_irq_handler(struct drm_i915_private *dev_priv,
u32 gt_iir[4])
{
if (gt_iir[0]) {
gen8_cs_irq_handler(dev_priv->engine[RCS],
gt_iir[0], GEN8_RCS_IRQ_SHIFT);
gen8_cs_irq_handler(dev_priv->engine[BCS],
gt_iir[0], GEN8_BCS_IRQ_SHIFT);
}
if (gt_iir[1]) {
gen8_cs_irq_handler(dev_priv->engine[VCS],
gt_iir[1], GEN8_VCS1_IRQ_SHIFT);
gen8_cs_irq_handler(dev_priv->engine[VCS2],
gt_iir[1], GEN8_VCS2_IRQ_SHIFT);
}
if (gt_iir[3])
gen8_cs_irq_handler(dev_priv->engine[VECS],
gt_iir[3], GEN8_VECS_IRQ_SHIFT);
if (gt_iir[2] & dev_priv->pm_rps_events)
gen6_rps_irq_handler(dev_priv, gt_iir[2]);
if (gt_iir[2] & dev_priv->pm_guc_events)
gen9_guc_irq_handler(dev_priv, gt_iir[2]);
}
static bool bxt_port_hotplug_long_detect(enum port port, u32 val)
{
switch (port) {
case PORT_A:
return val & PORTA_HOTPLUG_LONG_DETECT;
case PORT_B:
return val & PORTB_HOTPLUG_LONG_DETECT;
case PORT_C:
return val & PORTC_HOTPLUG_LONG_DETECT;
default:
return false;
}
}
static bool spt_port_hotplug2_long_detect(enum port port, u32 val)
{
switch (port) {
case PORT_E:
return val & PORTE_HOTPLUG_LONG_DETECT;
default:
return false;
}
}
static bool spt_port_hotplug_long_detect(enum port port, u32 val)
{
switch (port) {
case PORT_A:
return val & PORTA_HOTPLUG_LONG_DETECT;
case PORT_B:
return val & PORTB_HOTPLUG_LONG_DETECT;
case PORT_C:
return val & PORTC_HOTPLUG_LONG_DETECT;
case PORT_D:
return val & PORTD_HOTPLUG_LONG_DETECT;
default:
return false;
}
}
static bool ilk_port_hotplug_long_detect(enum port port, u32 val)
{
switch (port) {
case PORT_A:
return val & DIGITAL_PORTA_HOTPLUG_LONG_DETECT;
default:
return false;
}
}
static bool pch_port_hotplug_long_detect(enum port port, u32 val)
{
switch (port) {
case PORT_B:
return val & PORTB_HOTPLUG_LONG_DETECT;
case PORT_C:
return val & PORTC_HOTPLUG_LONG_DETECT;
case PORT_D:
return val & PORTD_HOTPLUG_LONG_DETECT;
default:
return false;
}
}
static bool i9xx_port_hotplug_long_detect(enum port port, u32 val)
{
switch (port) {
case PORT_B:
return val & PORTB_HOTPLUG_INT_LONG_PULSE;
case PORT_C:
return val & PORTC_HOTPLUG_INT_LONG_PULSE;
case PORT_D:
return val & PORTD_HOTPLUG_INT_LONG_PULSE;
default:
return false;
}
}
/*
* Get a bit mask of pins that have triggered, and which ones may be long.
* This can be called multiple times with the same masks to accumulate
* hotplug detection results from several registers.
*
* Note that the caller is expected to zero out the masks initially.
*/
static void intel_get_hpd_pins(u32 *pin_mask, u32 *long_mask,
u32 hotplug_trigger, u32 dig_hotplug_reg,
const u32 hpd[HPD_NUM_PINS],
bool long_pulse_detect(enum port port, u32 val))
{
enum port port;
int i;
for_each_hpd_pin(i) {
if ((hpd[i] & hotplug_trigger) == 0)
continue;
*pin_mask |= BIT(i);
if (!intel_hpd_pin_to_port(i, &port))
continue;
if (long_pulse_detect(port, dig_hotplug_reg))
*long_mask |= BIT(i);
}
DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x, dig 0x%08x, pins 0x%08x\n",
hotplug_trigger, dig_hotplug_reg, *pin_mask);
}
static void gmbus_irq_handler(struct drm_i915_private *dev_priv)
{
wake_up_all(&dev_priv->gmbus_wait_queue);
}
static void dp_aux_irq_handler(struct drm_i915_private *dev_priv)
{
wake_up_all(&dev_priv->gmbus_wait_queue);
}
#if defined(CONFIG_DEBUG_FS)
static void display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
enum pipe pipe,
uint32_t crc0, uint32_t crc1,
uint32_t crc2, uint32_t crc3,
uint32_t crc4)
{
struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
struct intel_pipe_crc_entry *entry;
struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
struct drm_driver *driver = dev_priv->drm.driver;
uint32_t crcs[5];
int head, tail;
spin_lock(&pipe_crc->lock);
if (pipe_crc->source) {
if (!pipe_crc->entries) {
spin_unlock(&pipe_crc->lock);
DRM_DEBUG_KMS("spurious interrupt\n");
return;
}
head = pipe_crc->head;
tail = pipe_crc->tail;
if (CIRC_SPACE(head, tail, INTEL_PIPE_CRC_ENTRIES_NR) < 1) {
spin_unlock(&pipe_crc->lock);
DRM_ERROR("CRC buffer overflowing\n");
return;
}
entry = &pipe_crc->entries[head];
entry->frame = driver->get_vblank_counter(&dev_priv->drm, pipe);
entry->crc[0] = crc0;
entry->crc[1] = crc1;
entry->crc[2] = crc2;
entry->crc[3] = crc3;
entry->crc[4] = crc4;
head = (head + 1) & (INTEL_PIPE_CRC_ENTRIES_NR - 1);
pipe_crc->head = head;
spin_unlock(&pipe_crc->lock);
wake_up_interruptible(&pipe_crc->wq);
} else {
/*
* For some not yet identified reason, the first CRC is
* bonkers. So let's just wait for the next vblank and read
* out the buggy result.
*
* On CHV sometimes the second CRC is bonkers as well, so
* don't trust that one either.
*/
if (pipe_crc->skipped == 0 ||
(IS_CHERRYVIEW(dev_priv) && pipe_crc->skipped == 1)) {
pipe_crc->skipped++;
spin_unlock(&pipe_crc->lock);
return;
}
spin_unlock(&pipe_crc->lock);
crcs[0] = crc0;
crcs[1] = crc1;
crcs[2] = crc2;
crcs[3] = crc3;
crcs[4] = crc4;
drm_crtc_add_crc_entry(&crtc->base, true,
drm_accurate_vblank_count(&crtc->base),
crcs);
}
}
#else
static inline void
display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
enum pipe pipe,
uint32_t crc0, uint32_t crc1,
uint32_t crc2, uint32_t crc3,
uint32_t crc4) {}
#endif
static void hsw_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
enum pipe pipe)
{
display_pipe_crc_irq_handler(dev_priv, pipe,
I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
0, 0, 0, 0);
}
static void ivb_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
enum pipe pipe)
{
display_pipe_crc_irq_handler(dev_priv, pipe,
I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
I915_READ(PIPE_CRC_RES_2_IVB(pipe)),
I915_READ(PIPE_CRC_RES_3_IVB(pipe)),
I915_READ(PIPE_CRC_RES_4_IVB(pipe)),
I915_READ(PIPE_CRC_RES_5_IVB(pipe)));
}
static void i9xx_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
enum pipe pipe)
{
uint32_t res1, res2;
if (INTEL_GEN(dev_priv) >= 3)
res1 = I915_READ(PIPE_CRC_RES_RES1_I915(pipe));
else
res1 = 0;
if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv))
res2 = I915_READ(PIPE_CRC_RES_RES2_G4X(pipe));
else
res2 = 0;
display_pipe_crc_irq_handler(dev_priv, pipe,
I915_READ(PIPE_CRC_RES_RED(pipe)),
I915_READ(PIPE_CRC_RES_GREEN(pipe)),
I915_READ(PIPE_CRC_RES_BLUE(pipe)),
res1, res2);
}
/* The RPS events need forcewake, so we add them to a work queue and mask their
* IMR bits until the work is done. Other interrupts can be processed without
* the work queue. */
static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
{
if (pm_iir & dev_priv->pm_rps_events) {
spin_lock(&dev_priv->irq_lock);
gen6_mask_pm_irq(dev_priv, pm_iir & dev_priv->pm_rps_events);
if (dev_priv->rps.interrupts_enabled) {
dev_priv->rps.pm_iir |= pm_iir & dev_priv->pm_rps_events;
schedule_work(&dev_priv->rps.work);
}
spin_unlock(&dev_priv->irq_lock);
}
if (INTEL_INFO(dev_priv)->gen >= 8)
return;
if (HAS_VEBOX(dev_priv)) {
if (pm_iir & PM_VEBOX_USER_INTERRUPT)
notify_ring(dev_priv->engine[VECS]);
if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT)
DRM_DEBUG("Command parser error, pm_iir 0x%08x\n", pm_iir);
}
}
static void gen9_guc_irq_handler(struct drm_i915_private *dev_priv, u32 gt_iir)
{
if (gt_iir & GEN9_GUC_TO_HOST_INT_EVENT) {
/* Sample the log buffer flush related bits & clear them out now
* itself from the message identity register to minimize the
* probability of losing a flush interrupt, when there are back
* to back flush interrupts.
* There can be a new flush interrupt, for different log buffer
* type (like for ISR), whilst Host is handling one (for DPC).
* Since same bit is used in message register for ISR & DPC, it
* could happen that GuC sets the bit for 2nd interrupt but Host
* clears out the bit on handling the 1st interrupt.
*/
u32 msg, flush;
msg = I915_READ(SOFT_SCRATCH(15));
flush = msg & (INTEL_GUC_RECV_MSG_CRASH_DUMP_POSTED |
INTEL_GUC_RECV_MSG_FLUSH_LOG_BUFFER);
if (flush) {
/* Clear the message bits that are handled */
I915_WRITE(SOFT_SCRATCH(15), msg & ~flush);
/* Handle flush interrupt in bottom half */
queue_work(dev_priv->guc.log.flush_wq,
&dev_priv->guc.log.flush_work);
dev_priv->guc.log.flush_interrupt_count++;
} else {
/* Not clearing of unhandled event bits won't result in
* re-triggering of the interrupt.
*/
}
}
}
static bool intel_pipe_handle_vblank(struct drm_i915_private *dev_priv,
enum pipe pipe)
{
bool ret;
ret = drm_handle_vblank(&dev_priv->drm, pipe);
if (ret)
intel_finish_page_flip_mmio(dev_priv, pipe);
return ret;
}
static void valleyview_pipestat_irq_ack(struct drm_i915_private *dev_priv,
u32 iir, u32 pipe_stats[I915_MAX_PIPES])
{
int pipe;
spin_lock(&dev_priv->irq_lock);
if (!dev_priv->display_irqs_enabled) {
spin_unlock(&dev_priv->irq_lock);
return;
}
for_each_pipe(dev_priv, pipe) {
i915_reg_t reg;
u32 mask, iir_bit = 0;
/*
* PIPESTAT bits get signalled even when the interrupt is
* disabled with the mask bits, and some of the status bits do
* not generate interrupts at all (like the underrun bit). Hence
* we need to be careful that we only handle what we want to
* handle.
*/
/* fifo underruns are filterered in the underrun handler. */
mask = PIPE_FIFO_UNDERRUN_STATUS;
switch (pipe) {
case PIPE_A:
iir_bit = I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
break;
case PIPE_B:
iir_bit = I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
break;
case PIPE_C:
iir_bit = I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
break;
}
if (iir & iir_bit)
mask |= dev_priv->pipestat_irq_mask[pipe];
if (!mask)
continue;
reg = PIPESTAT(pipe);
mask |= PIPESTAT_INT_ENABLE_MASK;
pipe_stats[pipe] = I915_READ(reg) & mask;
/*
* Clear the PIPE*STAT regs before the IIR
*/
if (pipe_stats[pipe] & (PIPE_FIFO_UNDERRUN_STATUS |
PIPESTAT_INT_STATUS_MASK))
I915_WRITE(reg, pipe_stats[pipe]);
}
spin_unlock(&dev_priv->irq_lock);
}
static void valleyview_pipestat_irq_handler(struct drm_i915_private *dev_priv,
u32 pipe_stats[I915_MAX_PIPES])
{
enum pipe pipe;
for_each_pipe(dev_priv, pipe) {
if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
intel_pipe_handle_vblank(dev_priv, pipe))
intel_check_page_flip(dev_priv, pipe);
if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV)
intel_finish_page_flip_cs(dev_priv, pipe);
if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
i9xx_pipe_crc_irq_handler(dev_priv, pipe);
if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
}
if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
gmbus_irq_handler(dev_priv);
}
static u32 i9xx_hpd_irq_ack(struct drm_i915_private *dev_priv)
{
u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
if (hotplug_status)
I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
return hotplug_status;
}
static void i9xx_hpd_irq_handler(struct drm_i915_private *dev_priv,
u32 hotplug_status)
{
u32 pin_mask = 0, long_mask = 0;
if (IS_G4X(dev_priv) || IS_VALLEYVIEW(dev_priv) ||
IS_CHERRYVIEW(dev_priv)) {
u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_G4X;
if (hotplug_trigger) {
intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
hotplug_trigger, hpd_status_g4x,
i9xx_port_hotplug_long_detect);
intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
}
if (hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X)
dp_aux_irq_handler(dev_priv);
} else {
u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
if (hotplug_trigger) {
intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
hotplug_trigger, hpd_status_i915,
i9xx_port_hotplug_long_detect);
intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
}
}
}
static irqreturn_t valleyview_irq_handler(int irq, void *arg)
{
struct drm_device *dev = arg;
struct drm_i915_private *dev_priv = to_i915(dev);
irqreturn_t ret = IRQ_NONE;
if (!intel_irqs_enabled(dev_priv))
return IRQ_NONE;
/* IRQs are synced during runtime_suspend, we don't require a wakeref */
disable_rpm_wakeref_asserts(dev_priv);
do {
u32 iir, gt_iir, pm_iir;
u32 pipe_stats[I915_MAX_PIPES] = {};
u32 hotplug_status = 0;
u32 ier = 0;
gt_iir = I915_READ(GTIIR);
pm_iir = I915_READ(GEN6_PMIIR);
iir = I915_READ(VLV_IIR);
if (gt_iir == 0 && pm_iir == 0 && iir == 0)
break;
ret = IRQ_HANDLED;
/*
* Theory on interrupt generation, based on empirical evidence:
*
* x = ((VLV_IIR & VLV_IER) ||
* (((GT_IIR & GT_IER) || (GEN6_PMIIR & GEN6_PMIER)) &&
* (VLV_MASTER_IER & MASTER_INTERRUPT_ENABLE)));
*
* A CPU interrupt will only be raised when 'x' has a 0->1 edge.
* Hence we clear MASTER_INTERRUPT_ENABLE and VLV_IER to
* guarantee the CPU interrupt will be raised again even if we
* don't end up clearing all the VLV_IIR, GT_IIR, GEN6_PMIIR
* bits this time around.
*/
I915_WRITE(VLV_MASTER_IER, 0);
ier = I915_READ(VLV_IER);
I915_WRITE(VLV_IER, 0);
if (gt_iir)
I915_WRITE(GTIIR, gt_iir);
if (pm_iir)
I915_WRITE(GEN6_PMIIR, pm_iir);
if (iir & I915_DISPLAY_PORT_INTERRUPT)
hotplug_status = i9xx_hpd_irq_ack(dev_priv);
/* Call regardless, as some status bits might not be
* signalled in iir */
valleyview_pipestat_irq_ack(dev_priv, iir, pipe_stats);
/*
* VLV_IIR is single buffered, and reflects the level
* from PIPESTAT/PORT_HOTPLUG_STAT, hence clear it last.
*/
if (iir)
I915_WRITE(VLV_IIR, iir);
I915_WRITE(VLV_IER, ier);
I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
POSTING_READ(VLV_MASTER_IER);
if (gt_iir)
snb_gt_irq_handler(dev_priv, gt_iir);
if (pm_iir)
gen6_rps_irq_handler(dev_priv, pm_iir);
if (hotplug_status)
i9xx_hpd_irq_handler(dev_priv, hotplug_status);
valleyview_pipestat_irq_handler(dev_priv, pipe_stats);
} while (0);
enable_rpm_wakeref_asserts(dev_priv);
return ret;
}
static irqreturn_t cherryview_irq_handler(int irq, void *arg)
{
struct drm_device *dev = arg;
struct drm_i915_private *dev_priv = to_i915(dev);
irqreturn_t ret = IRQ_NONE;
if (!intel_irqs_enabled(dev_priv))
return IRQ_NONE;
/* IRQs are synced during runtime_suspend, we don't require a wakeref */
disable_rpm_wakeref_asserts(dev_priv);
do {
u32 master_ctl, iir;
u32 gt_iir[4] = {};
u32 pipe_stats[I915_MAX_PIPES] = {};
u32 hotplug_status = 0;
u32 ier = 0;
master_ctl = I915_READ(GEN8_MASTER_IRQ) & ~GEN8_MASTER_IRQ_CONTROL;
iir = I915_READ(VLV_IIR);
if (master_ctl == 0 && iir == 0)
break;
ret = IRQ_HANDLED;
/*
* Theory on interrupt generation, based on empirical evidence:
*
* x = ((VLV_IIR & VLV_IER) ||
* ((GEN8_MASTER_IRQ & ~GEN8_MASTER_IRQ_CONTROL) &&
* (GEN8_MASTER_IRQ & GEN8_MASTER_IRQ_CONTROL)));
*
* A CPU interrupt will only be raised when 'x' has a 0->1 edge.
* Hence we clear GEN8_MASTER_IRQ_CONTROL and VLV_IER to
* guarantee the CPU interrupt will be raised again even if we
* don't end up clearing all the VLV_IIR and GEN8_MASTER_IRQ_CONTROL
* bits this time around.
*/
I915_WRITE(GEN8_MASTER_IRQ, 0);
ier = I915_READ(VLV_IER);
I915_WRITE(VLV_IER, 0);
gen8_gt_irq_ack(dev_priv, master_ctl, gt_iir);
if (iir & I915_DISPLAY_PORT_INTERRUPT)
hotplug_status = i9xx_hpd_irq_ack(dev_priv);
/* Call regardless, as some status bits might not be
* signalled in iir */
valleyview_pipestat_irq_ack(dev_priv, iir, pipe_stats);
/*
* VLV_IIR is single buffered, and reflects the level
* from PIPESTAT/PORT_HOTPLUG_STAT, hence clear it last.
*/
if (iir)
I915_WRITE(VLV_IIR, iir);
I915_WRITE(VLV_IER, ier);
I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
POSTING_READ(GEN8_MASTER_IRQ);
gen8_gt_irq_handler(dev_priv, gt_iir);
if (hotplug_status)
i9xx_hpd_irq_handler(dev_priv, hotplug_status);
valleyview_pipestat_irq_handler(dev_priv, pipe_stats);
} while (0);
enable_rpm_wakeref_asserts(dev_priv);
return ret;
}
static void ibx_hpd_irq_handler(struct drm_i915_private *dev_priv,
u32 hotplug_trigger,
const u32 hpd[HPD_NUM_PINS])
{
u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
/*
* Somehow the PCH doesn't seem to really ack the interrupt to the CPU
* unless we touch the hotplug register, even if hotplug_trigger is
* zero. Not acking leads to "The master control interrupt lied (SDE)!"
* errors.
*/
dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
if (!hotplug_trigger) {
u32 mask = PORTA_HOTPLUG_STATUS_MASK |
PORTD_HOTPLUG_STATUS_MASK |
PORTC_HOTPLUG_STATUS_MASK |
PORTB_HOTPLUG_STATUS_MASK;
dig_hotplug_reg &= ~mask;
}
I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
if (!hotplug_trigger)
return;
intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
dig_hotplug_reg, hpd,
pch_port_hotplug_long_detect);
intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
}
static void ibx_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
{
int pipe;
u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
ibx_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_ibx);
if (pch_iir & SDE_AUDIO_POWER_MASK) {
int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
SDE_AUDIO_POWER_SHIFT);
DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
port_name(port));
}
if (pch_iir & SDE_AUX_MASK)
dp_aux_irq_handler(dev_priv);
if (pch_iir & SDE_GMBUS)
gmbus_irq_handler(dev_priv);
if (pch_iir & SDE_AUDIO_HDCP_MASK)
DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
if (pch_iir & SDE_AUDIO_TRANS_MASK)
DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
if (pch_iir & SDE_POISON)
DRM_ERROR("PCH poison interrupt\n");
if (pch_iir & SDE_FDI_MASK)
for_each_pipe(dev_priv, pipe)
DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
pipe_name(pipe),
I915_READ(FDI_RX_IIR(pipe)));
if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
if (pch_iir & SDE_TRANSA_FIFO_UNDER)
intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_A);
if (pch_iir & SDE_TRANSB_FIFO_UNDER)
intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_B);
}
static void ivb_err_int_handler(struct drm_i915_private *dev_priv)
{
u32 err_int = I915_READ(GEN7_ERR_INT);
enum pipe pipe;
if (err_int & ERR_INT_POISON)
DRM_ERROR("Poison interrupt\n");
for_each_pipe(dev_priv, pipe) {
if (err_int & ERR_INT_FIFO_UNDERRUN(pipe))
intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
if (err_int & ERR_INT_PIPE_CRC_DONE(pipe)) {
if (IS_IVYBRIDGE(dev_priv))
ivb_pipe_crc_irq_handler(dev_priv, pipe);
else
hsw_pipe_crc_irq_handler(dev_priv, pipe);
}
}
I915_WRITE(GEN7_ERR_INT, err_int);
}
static void cpt_serr_int_handler(struct drm_i915_private *dev_priv)
{
u32 serr_int = I915_READ(SERR_INT);
if (serr_int & SERR_INT_POISON)
DRM_ERROR("PCH poison interrupt\n");
if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_A);
if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_B);
if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_C);
I915_WRITE(SERR_INT, serr_int);
}
static void cpt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
{
int pipe;
u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
ibx_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_cpt);
if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
SDE_AUDIO_POWER_SHIFT_CPT);
DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
port_name(port));
}
if (pch_iir & SDE_AUX_MASK_CPT)
dp_aux_irq_handler(dev_priv);
if (pch_iir & SDE_GMBUS_CPT)
gmbus_irq_handler(dev_priv);
if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
if (pch_iir & SDE_FDI_MASK_CPT)
for_each_pipe(dev_priv, pipe)
DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
pipe_name(pipe),
I915_READ(FDI_RX_IIR(pipe)));
if (pch_iir & SDE_ERROR_CPT)
cpt_serr_int_handler(dev_priv);
}
static void spt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
{
u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_SPT &
~SDE_PORTE_HOTPLUG_SPT;
u32 hotplug2_trigger = pch_iir & SDE_PORTE_HOTPLUG_SPT;
u32 pin_mask = 0, long_mask = 0;
if (hotplug_trigger) {
u32 dig_hotplug_reg;
dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
dig_hotplug_reg, hpd_spt,
spt_port_hotplug_long_detect);
}
if (hotplug2_trigger) {
u32 dig_hotplug_reg;
dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG2);
I915_WRITE(PCH_PORT_HOTPLUG2, dig_hotplug_reg);
intel_get_hpd_pins(&pin_mask, &long_mask, hotplug2_trigger,
dig_hotplug_reg, hpd_spt,
spt_port_hotplug2_long_detect);
}
if (pin_mask)
intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
if (pch_iir & SDE_GMBUS_CPT)
gmbus_irq_handler(dev_priv);
}
static void ilk_hpd_irq_handler(struct drm_i915_private *dev_priv,
u32 hotplug_trigger,
const u32 hpd[HPD_NUM_PINS])
{
u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
dig_hotplug_reg = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, dig_hotplug_reg);
intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
dig_hotplug_reg, hpd,
ilk_port_hotplug_long_detect);
intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
}
static void ilk_display_irq_handler(struct drm_i915_private *dev_priv,
u32 de_iir)
{
enum pipe pipe;
u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG;
if (hotplug_trigger)
ilk_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_ilk);
if (de_iir & DE_AUX_CHANNEL_A)
dp_aux_irq_handler(dev_priv);
if (de_iir & DE_GSE)
intel_opregion_asle_intr(dev_priv);
if (de_iir & DE_POISON)
DRM_ERROR("Poison interrupt\n");
for_each_pipe(dev_priv, pipe) {
if (de_iir & DE_PIPE_VBLANK(pipe) &&
intel_pipe_handle_vblank(dev_priv, pipe))
intel_check_page_flip(dev_priv, pipe);
if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe))
intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
if (de_iir & DE_PIPE_CRC_DONE(pipe))
i9xx_pipe_crc_irq_handler(dev_priv, pipe);
/* plane/pipes map 1:1 on ilk+ */
if (de_iir & DE_PLANE_FLIP_DONE(pipe))
intel_finish_page_flip_cs(dev_priv, pipe);
}
/* check event from PCH */
if (de_iir & DE_PCH_EVENT) {
u32 pch_iir = I915_READ(SDEIIR);
if (HAS_PCH_CPT(dev_priv))
cpt_irq_handler(dev_priv, pch_iir);
else
ibx_irq_handler(dev_priv, pch_iir);
/* should clear PCH hotplug event before clear CPU irq */
I915_WRITE(SDEIIR, pch_iir);
}
if (IS_GEN5(dev_priv) && de_iir & DE_PCU_EVENT)
ironlake_rps_change_irq_handler(dev_priv);
}
static void ivb_display_irq_handler(struct drm_i915_private *dev_priv,
u32 de_iir)
{
enum pipe pipe;
u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG_IVB;
if (hotplug_trigger)
ilk_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_ivb);
if (de_iir & DE_ERR_INT_IVB)
ivb_err_int_handler(dev_priv);
if (de_iir & DE_AUX_CHANNEL_A_IVB)
dp_aux_irq_handler(dev_priv);
if (de_iir & DE_GSE_IVB)
intel_opregion_asle_intr(dev_priv);
for_each_pipe(dev_priv, pipe) {
if (de_iir & (DE_PIPE_VBLANK_IVB(pipe)) &&
intel_pipe_handle_vblank(dev_priv, pipe))
intel_check_page_flip(dev_priv, pipe);
/* plane/pipes map 1:1 on ilk+ */
if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe))
intel_finish_page_flip_cs(dev_priv, pipe);
}
/* check event from PCH */
if (!HAS_PCH_NOP(dev_priv) && (de_iir & DE_PCH_EVENT_IVB)) {
u32 pch_iir = I915_READ(SDEIIR);
cpt_irq_handler(dev_priv, pch_iir);
/* clear PCH hotplug event before clear CPU irq */
I915_WRITE(SDEIIR, pch_iir);
}
}
/*
* To handle irqs with the minimum potential races with fresh interrupts, we:
* 1 - Disable Master Interrupt Control.
* 2 - Find the source(s) of the interrupt.
* 3 - Clear the Interrupt Identity bits (IIR).
* 4 - Process the interrupt(s) that had bits set in the IIRs.
* 5 - Re-enable Master Interrupt Control.
*/
static irqreturn_t ironlake_irq_handler(int irq, void *arg)
{
struct drm_device *dev = arg;
struct drm_i915_private *dev_priv = to_i915(dev);
u32 de_iir, gt_iir, de_ier, sde_ier = 0;
irqreturn_t ret = IRQ_NONE;
if (!intel_irqs_enabled(dev_priv))
return IRQ_NONE;
/* IRQs are synced during runtime_suspend, we don't require a wakeref */
disable_rpm_wakeref_asserts(dev_priv);
/* disable master interrupt before clearing iir */
de_ier = I915_READ(DEIER);
I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
POSTING_READ(DEIER);
/* Disable south interrupts. We'll only write to SDEIIR once, so further
* interrupts will will be stored on its back queue, and then we'll be
* able to process them after we restore SDEIER (as soon as we restore
* it, we'll get an interrupt if SDEIIR still has something to process
* due to its back queue). */
if (!HAS_PCH_NOP(dev_priv)) {
sde_ier = I915_READ(SDEIER);
I915_WRITE(SDEIER, 0);
POSTING_READ(SDEIER);
}
/* Find, clear, then process each source of interrupt */
gt_iir = I915_READ(GTIIR);
if (gt_iir) {
I915_WRITE(GTIIR, gt_iir);
ret = IRQ_HANDLED;
if (INTEL_GEN(dev_priv) >= 6)
snb_gt_irq_handler(dev_priv, gt_iir);
else
ilk_gt_irq_handler(dev_priv, gt_iir);
}
de_iir = I915_READ(DEIIR);
if (de_iir) {
I915_WRITE(DEIIR, de_iir);
ret = IRQ_HANDLED;
if (INTEL_GEN(dev_priv) >= 7)
ivb_display_irq_handler(dev_priv, de_iir);
else
ilk_display_irq_handler(dev_priv, de_iir);
}
if (INTEL_GEN(dev_priv) >= 6) {
u32 pm_iir = I915_READ(GEN6_PMIIR);
if (pm_iir) {
I915_WRITE(GEN6_PMIIR, pm_iir);
ret = IRQ_HANDLED;
gen6_rps_irq_handler(dev_priv, pm_iir);
}
}
I915_WRITE(DEIER, de_ier);
POSTING_READ(DEIER);
if (!HAS_PCH_NOP(dev_priv)) {
I915_WRITE(SDEIER, sde_ier);
POSTING_READ(SDEIER);
}
/* IRQs are synced during runtime_suspend, we don't require a wakeref */
enable_rpm_wakeref_asserts(dev_priv);
return ret;
}
static void bxt_hpd_irq_handler(struct drm_i915_private *dev_priv,
u32 hotplug_trigger,
const u32 hpd[HPD_NUM_PINS])
{
u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
dig_hotplug_reg, hpd,
bxt_port_hotplug_long_detect);
intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
}
static irqreturn_t
gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
{
irqreturn_t ret = IRQ_NONE;
u32 iir;
enum pipe pipe;
if (master_ctl & GEN8_DE_MISC_IRQ) {
iir = I915_READ(GEN8_DE_MISC_IIR);
if (iir) {
I915_WRITE(GEN8_DE_MISC_IIR, iir);
ret = IRQ_HANDLED;
if (iir & GEN8_DE_MISC_GSE)
intel_opregion_asle_intr(dev_priv);
else
DRM_ERROR("Unexpected DE Misc interrupt\n");
}
else
DRM_ERROR("The master control interrupt lied (DE MISC)!\n");
}
if (master_ctl & GEN8_DE_PORT_IRQ) {
iir = I915_READ(GEN8_DE_PORT_IIR);
if (iir) {
u32 tmp_mask;
bool found = false;
I915_WRITE(GEN8_DE_PORT_IIR, iir);
ret = IRQ_HANDLED;
tmp_mask = GEN8_AUX_CHANNEL_A;
if (INTEL_INFO(dev_priv)->gen >= 9)
tmp_mask |= GEN9_AUX_CHANNEL_B |
GEN9_AUX_CHANNEL_C |
GEN9_AUX_CHANNEL_D;
if (iir & tmp_mask) {
dp_aux_irq_handler(dev_priv);
found = true;
}
if (IS_GEN9_LP(dev_priv)) {
tmp_mask = iir & BXT_DE_PORT_HOTPLUG_MASK;
if (tmp_mask) {
bxt_hpd_irq_handler(dev_priv, tmp_mask,
hpd_bxt);
found = true;
}
} else if (IS_BROADWELL(dev_priv)) {
tmp_mask = iir & GEN8_PORT_DP_A_HOTPLUG;
if (tmp_mask) {
ilk_hpd_irq_handler(dev_priv,
tmp_mask, hpd_bdw);
found = true;
}
}
if (IS_GEN9_LP(dev_priv) && (iir & BXT_DE_PORT_GMBUS)) {
gmbus_irq_handler(dev_priv);
found = true;
}
if (!found)
DRM_ERROR("Unexpected DE Port interrupt\n");
}
else
DRM_ERROR("The master control interrupt lied (DE PORT)!\n");
}
for_each_pipe(dev_priv, pipe) {
u32 flip_done, fault_errors;
if (!(master_ctl & GEN8_DE_PIPE_IRQ(pipe)))
continue;
iir = I915_READ(GEN8_DE_PIPE_IIR(pipe));
if (!iir) {
DRM_ERROR("The master control interrupt lied (DE PIPE)!\n");
continue;
}
ret = IRQ_HANDLED;
I915_WRITE(GEN8_DE_PIPE_IIR(pipe), iir);
if (iir & GEN8_PIPE_VBLANK &&
intel_pipe_handle_vblank(dev_priv, pipe))
intel_check_page_flip(dev_priv, pipe);
flip_done = iir;
if (INTEL_INFO(dev_priv)->gen >= 9)
flip_done &= GEN9_PIPE_PLANE1_FLIP_DONE;
else
flip_done &= GEN8_PIPE_PRIMARY_FLIP_DONE;
if (flip_done)
intel_finish_page_flip_cs(dev_priv, pipe);
if (iir & GEN8_PIPE_CDCLK_CRC_DONE)
hsw_pipe_crc_irq_handler(dev_priv, pipe);
if (iir & GEN8_PIPE_FIFO_UNDERRUN)
intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
fault_errors = iir;
if (INTEL_INFO(dev_priv)->gen >= 9)
fault_errors &= GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
else
fault_errors &= GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
if (fault_errors)
DRM_ERROR("Fault errors on pipe %c: 0x%08x\n",
pipe_name(pipe),
fault_errors);
}
if (HAS_PCH_SPLIT(dev_priv) && !HAS_PCH_NOP(dev_priv) &&
master_ctl & GEN8_DE_PCH_IRQ) {
/*
* FIXME(BDW): Assume for now that the new interrupt handling
* scheme also closed the SDE interrupt handling race we've seen
* on older pch-split platforms. But this needs testing.
*/
iir = I915_READ(SDEIIR);
if (iir) {
I915_WRITE(SDEIIR, iir);
ret = IRQ_HANDLED;
if (HAS_PCH_SPT(dev_priv) || HAS_PCH_KBP(dev_priv))
spt_irq_handler(dev_priv, iir);
else
cpt_irq_handler(dev_priv, iir);
} else {
/*
* Like on previous PCH there seems to be something
* fishy going on with forwarding PCH interrupts.
*/
DRM_DEBUG_DRIVER("The master control interrupt lied (SDE)!\n");
}
}
return ret;
}
static irqreturn_t gen8_irq_handler(int irq, void *arg)
{
struct drm_device *dev = arg;
struct drm_i915_private *dev_priv = to_i915(dev);
u32 master_ctl;
u32 gt_iir[4] = {};
irqreturn_t ret;
if (!intel_irqs_enabled(dev_priv))
return IRQ_NONE;
master_ctl = I915_READ_FW(GEN8_MASTER_IRQ);
master_ctl &= ~GEN8_MASTER_IRQ_CONTROL;
if (!master_ctl)
return IRQ_NONE;
I915_WRITE_FW(GEN8_MASTER_IRQ, 0);
/* IRQs are synced during runtime_suspend, we don't require a wakeref */
disable_rpm_wakeref_asserts(dev_priv);
/* Find, clear, then process each source of interrupt */
ret = gen8_gt_irq_ack(dev_priv, master_ctl, gt_iir);
gen8_gt_irq_handler(dev_priv, gt_iir);
ret |= gen8_de_irq_handler(dev_priv, master_ctl);
I915_WRITE_FW(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
POSTING_READ_FW(GEN8_MASTER_IRQ);
enable_rpm_wakeref_asserts(dev_priv);
return ret;
}
static void i915_error_wake_up(struct drm_i915_private *dev_priv)
{
/*
* Notify all waiters for GPU completion events that reset state has
* been changed, and that they need to restart their wait after
* checking for potential errors (and bail out to drop locks if there is
* a gpu reset pending so that i915_error_work_func can acquire them).
*/
/* Wake up __wait_seqno, potentially holding dev->struct_mutex. */
wake_up_all(&dev_priv->gpu_error.wait_queue);
/* Wake up intel_crtc_wait_for_pending_flips, holding crtc->mutex. */
wake_up_all(&dev_priv->pending_flip_queue);
}
/**
* i915_reset_and_wakeup - do process context error handling work
* @dev_priv: i915 device private
*
* Fire an error uevent so userspace can see that a hang or error
* was detected.
*/
static void i915_reset_and_wakeup(struct drm_i915_private *dev_priv)
{
struct kobject *kobj = &dev_priv->drm.primary->kdev->kobj;
char *error_event[] = { I915_ERROR_UEVENT "=1", NULL };
char *reset_event[] = { I915_RESET_UEVENT "=1", NULL };
char *reset_done_event[] = { I915_ERROR_UEVENT "=0", NULL };
kobject_uevent_env(kobj, KOBJ_CHANGE, error_event);
DRM_DEBUG_DRIVER("resetting chip\n");
kobject_uevent_env(kobj, KOBJ_CHANGE, reset_event);
/*
* In most cases it's guaranteed that we get here with an RPM
* reference held, for example because there is a pending GPU
* request that won't finish until the reset is done. This
* isn't the case at least when we get here by doing a
* simulated reset via debugs, so get an RPM reference.
*/
intel_runtime_pm_get(dev_priv);
intel_prepare_reset(dev_priv);
do {
/*
* All state reset _must_ be completed before we update the
* reset counter, for otherwise waiters might miss the reset
* pending state and not properly drop locks, resulting in
* deadlocks with the reset work.
*/
if (mutex_trylock(&dev_priv->drm.struct_mutex)) {
i915_reset(dev_priv);
mutex_unlock(&dev_priv->drm.struct_mutex);
}
/* We need to wait for anyone holding the lock to wakeup */
} while (wait_on_bit_timeout(&dev_priv->gpu_error.flags,
I915_RESET_IN_PROGRESS,
TASK_UNINTERRUPTIBLE,
HZ));
intel_finish_reset(dev_priv);
intel_runtime_pm_put(dev_priv);
if (!test_bit(I915_WEDGED, &dev_priv->gpu_error.flags))
kobject_uevent_env(kobj,
KOBJ_CHANGE, reset_done_event);
/*
* Note: The wake_up also serves as a memory barrier so that
* waiters see the updated value of the dev_priv->gpu_error.
*/
wake_up_all(&dev_priv->gpu_error.reset_queue);
}
static inline void
i915_err_print_instdone(struct drm_i915_private *dev_priv,
struct intel_instdone *instdone)
{
int slice;
int subslice;
pr_err(" INSTDONE: 0x%08x\n", instdone->instdone);
if (INTEL_GEN(dev_priv) <= 3)
return;
pr_err(" SC_INSTDONE: 0x%08x\n", instdone->slice_common);
if (INTEL_GEN(dev_priv) <= 6)
return;
for_each_instdone_slice_subslice(dev_priv, slice, subslice)
pr_err(" SAMPLER_INSTDONE[%d][%d]: 0x%08x\n",
slice, subslice, instdone->sampler[slice][subslice]);
for_each_instdone_slice_subslice(dev_priv, slice, subslice)
pr_err(" ROW_INSTDONE[%d][%d]: 0x%08x\n",
slice, subslice, instdone->row[slice][subslice]);
}
static void i915_clear_error_registers(struct drm_i915_private *dev_priv)
{
u32 eir;
if (!IS_GEN2(dev_priv))
I915_WRITE(PGTBL_ER, I915_READ(PGTBL_ER));
if (INTEL_GEN(dev_priv) < 4)
I915_WRITE(IPEIR, I915_READ(IPEIR));
else
I915_WRITE(IPEIR_I965, I915_READ(IPEIR_I965));
I915_WRITE(EIR, I915_READ(EIR));
eir = I915_READ(EIR);
if (eir) {
/*
* some errors might have become stuck,
* mask them.
*/
DRM_DEBUG_DRIVER("EIR stuck: 0x%08x, masking\n", eir);
I915_WRITE(EMR, I915_READ(EMR) | eir);
I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
}
}
/**
* i915_handle_error - handle a gpu error
* @dev_priv: i915 device private
* @engine_mask: mask representing engines that are hung
* @fmt: Error message format string
*
* Do some basic checking of register state at error time and
* dump it to the syslog. Also call i915_capture_error_state() to make
* sure we get a record and make it available in debugfs. Fire a uevent
* so userspace knows something bad happened (should trigger collection
* of a ring dump etc.).
*/
void i915_handle_error(struct drm_i915_private *dev_priv,
u32 engine_mask,
const char *fmt, ...)
{
va_list args;
char error_msg[80];
va_start(args, fmt);
vscnprintf(error_msg, sizeof(error_msg), fmt, args);
va_end(args);
i915_capture_error_state(dev_priv, engine_mask, error_msg);
i915_clear_error_registers(dev_priv);
if (!engine_mask)
return;
if (test_and_set_bit(I915_RESET_IN_PROGRESS,
&dev_priv->gpu_error.flags))
return;
/*
* Wakeup waiting processes so that the reset function
* i915_reset_and_wakeup doesn't deadlock trying to grab
* various locks. By bumping the reset counter first, the woken
* processes will see a reset in progress and back off,
* releasing their locks and then wait for the reset completion.
* We must do this for _all_ gpu waiters that might hold locks
* that the reset work needs to acquire.
*
* Note: The wake_up also provides a memory barrier to ensure that the
* waiters see the updated value of the reset flags.
*/
i915_error_wake_up(dev_priv);
i915_reset_and_wakeup(dev_priv);
}
/* Called from drm generic code, passed 'crtc' which
* we use as a pipe index
*/
static int i8xx_enable_vblank(struct drm_device *dev, unsigned int pipe)
{
struct drm_i915_private *dev_priv = to_i915(dev);
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
i915_enable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_STATUS);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
return 0;
}
static int i965_enable_vblank(struct drm_device *dev, unsigned int pipe)
{
struct drm_i915_private *dev_priv = to_i915(dev);
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
i915_enable_pipestat(dev_priv, pipe,
PIPE_START_VBLANK_INTERRUPT_STATUS);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
return 0;
}
static int ironlake_enable_vblank(struct drm_device *dev, unsigned int pipe)
{
struct drm_i915_private *dev_priv = to_i915(dev);
unsigned long irqflags;
uint32_t bit = INTEL_GEN(dev_priv) >= 7 ?
DE_PIPE_VBLANK_IVB(pipe) : DE_PIPE_VBLANK(pipe);
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
ilk_enable_display_irq(dev_priv, bit);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
return 0;
}
static int gen8_enable_vblank(struct drm_device *dev, unsigned int pipe)
{
struct drm_i915_private *dev_priv = to_i915(dev);
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
bdw_enable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
return 0;
}
/* Called from drm generic code, passed 'crtc' which
* we use as a pipe index
*/
static void i8xx_disable_vblank(struct drm_device *dev, unsigned int pipe)
{
struct drm_i915_private *dev_priv = to_i915(dev);
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
i915_disable_pipestat(dev_priv, pipe, PIPE_VBLANK_INTERRUPT_STATUS);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}
static void i965_disable_vblank(struct drm_device *dev, unsigned int pipe)
{
struct drm_i915_private *dev_priv = to_i915(dev);
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
i915_disable_pipestat(dev_priv, pipe,
PIPE_START_VBLANK_INTERRUPT_STATUS);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}
static void ironlake_disable_vblank(struct drm_device *dev, unsigned int pipe)
{
struct drm_i915_private *dev_priv = to_i915(dev);
unsigned long irqflags;
uint32_t bit = INTEL_GEN(dev_priv) >= 7 ?
DE_PIPE_VBLANK_IVB(pipe) : DE_PIPE_VBLANK(pipe);
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
ilk_disable_display_irq(dev_priv, bit);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}
static void gen8_disable_vblank(struct drm_device *dev, unsigned int pipe)
{
struct drm_i915_private *dev_priv = to_i915(dev);
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
bdw_disable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
}
static void ibx_irq_reset(struct drm_i915_private *dev_priv)
{
if (HAS_PCH_NOP(dev_priv))
return;
GEN5_IRQ_RESET(SDE);
if (HAS_PCH_CPT(dev_priv) || HAS_PCH_LPT(dev_priv))
I915_WRITE(SERR_INT, 0xffffffff);
}
/*
* SDEIER is also touched by the interrupt handler to work around missed PCH
* interrupts. Hence we can't update it after the interrupt handler is enabled -
* instead we unconditionally enable all PCH interrupt sources here, but then
* only unmask them as needed with SDEIMR.
*
* This function needs to be called before interrupts are enabled.
*/
static void ibx_irq_pre_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
if (HAS_PCH_NOP(dev_priv))
return;
WARN_ON(I915_READ(SDEIER) != 0);
I915_WRITE(SDEIER, 0xffffffff);
POSTING_READ(SDEIER);
}
static void gen5_gt_irq_reset(struct drm_i915_private *dev_priv)
{
GEN5_IRQ_RESET(GT);
if (INTEL_GEN(dev_priv) >= 6)
GEN5_IRQ_RESET(GEN6_PM);
}
static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
{
enum pipe pipe;
if (IS_CHERRYVIEW(dev_priv))
I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK_CHV);
else
I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
i915_hotplug_interrupt_update_locked(dev_priv, 0xffffffff, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
for_each_pipe(dev_priv, pipe) {
I915_WRITE(PIPESTAT(pipe),
PIPE_FIFO_UNDERRUN_STATUS |
PIPESTAT_INT_STATUS_MASK);
dev_priv->pipestat_irq_mask[pipe] = 0;
}
GEN5_IRQ_RESET(VLV_);
dev_priv->irq_mask = ~0;
}
static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
{
u32 pipestat_mask;
u32 enable_mask;
enum pipe pipe;
pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV |
PIPE_CRC_DONE_INTERRUPT_STATUS;
i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
for_each_pipe(dev_priv, pipe)
i915_enable_pipestat(dev_priv, pipe, pipestat_mask);
enable_mask = I915_DISPLAY_PORT_INTERRUPT |
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
if (IS_CHERRYVIEW(dev_priv))
enable_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
WARN_ON(dev_priv->irq_mask != ~0);
dev_priv->irq_mask = ~enable_mask;
GEN5_IRQ_INIT(VLV_, dev_priv->irq_mask, enable_mask);
}
/* drm_dma.h hooks
*/
static void ironlake_irq_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
I915_WRITE(HWSTAM, 0xffffffff);
GEN5_IRQ_RESET(DE);
if (IS_GEN7(dev_priv))
I915_WRITE(GEN7_ERR_INT, 0xffffffff);
gen5_gt_irq_reset(dev_priv);
ibx_irq_reset(dev_priv);
}
static void valleyview_irq_preinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
I915_WRITE(VLV_MASTER_IER, 0);
POSTING_READ(VLV_MASTER_IER);
gen5_gt_irq_reset(dev_priv);
spin_lock_irq(&dev_priv->irq_lock);
if (dev_priv->display_irqs_enabled)
vlv_display_irq_reset(dev_priv);
spin_unlock_irq(&dev_priv->irq_lock);
}
static void gen8_gt_irq_reset(struct drm_i915_private *dev_priv)
{
GEN8_IRQ_RESET_NDX(GT, 0);
GEN8_IRQ_RESET_NDX(GT, 1);
GEN8_IRQ_RESET_NDX(GT, 2);
GEN8_IRQ_RESET_NDX(GT, 3);
}
static void gen8_irq_reset(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
int pipe;
I915_WRITE(GEN8_MASTER_IRQ, 0);
POSTING_READ(GEN8_MASTER_IRQ);
gen8_gt_irq_reset(dev_priv);
for_each_pipe(dev_priv, pipe)
if (intel_display_power_is_enabled(dev_priv,
POWER_DOMAIN_PIPE(pipe)))
GEN8_IRQ_RESET_NDX(DE_PIPE, pipe);
GEN5_IRQ_RESET(GEN8_DE_PORT_);
GEN5_IRQ_RESET(GEN8_DE_MISC_);
GEN5_IRQ_RESET(GEN8_PCU_);
if (HAS_PCH_SPLIT(dev_priv))
ibx_irq_reset(dev_priv);
}
void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
unsigned int pipe_mask)
{
uint32_t extra_ier = GEN8_PIPE_VBLANK | GEN8_PIPE_FIFO_UNDERRUN;
enum pipe pipe;
spin_lock_irq(&dev_priv->irq_lock);
for_each_pipe_masked(dev_priv, pipe, pipe_mask)
GEN8_IRQ_INIT_NDX(DE_PIPE, pipe,
dev_priv->de_irq_mask[pipe],
~dev_priv->de_irq_mask[pipe] | extra_ier);
spin_unlock_irq(&dev_priv->irq_lock);
}
void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv,
unsigned int pipe_mask)
{
enum pipe pipe;
spin_lock_irq(&dev_priv->irq_lock);
for_each_pipe_masked(dev_priv, pipe, pipe_mask)
GEN8_IRQ_RESET_NDX(DE_PIPE, pipe);
spin_unlock_irq(&dev_priv->irq_lock);
/* make sure we're done processing display irqs */
synchronize_irq(dev_priv->drm.irq);
}
static void cherryview_irq_preinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
I915_WRITE(GEN8_MASTER_IRQ, 0);
POSTING_READ(GEN8_MASTER_IRQ);
gen8_gt_irq_reset(dev_priv);
GEN5_IRQ_RESET(GEN8_PCU_);
spin_lock_irq(&dev_priv->irq_lock);
if (dev_priv->display_irqs_enabled)
vlv_display_irq_reset(dev_priv);
spin_unlock_irq(&dev_priv->irq_lock);
}
static u32 intel_hpd_enabled_irqs(struct drm_i915_private *dev_priv,
const u32 hpd[HPD_NUM_PINS])
{
struct intel_encoder *encoder;
u32 enabled_irqs = 0;
for_each_intel_encoder(&dev_priv->drm, encoder)
if (dev_priv->hotplug.stats[encoder->hpd_pin].state == HPD_ENABLED)
enabled_irqs |= hpd[encoder->hpd_pin];
return enabled_irqs;
}
static void ibx_hpd_detection_setup(struct drm_i915_private *dev_priv)
{
u32 hotplug;
/*
* Enable digital hotplug on the PCH, and configure the DP short pulse
* duration to 2ms (which is the minimum in the Display Port spec).
* The pulse duration bits are reserved on LPT+.
*/
hotplug = I915_READ(PCH_PORT_HOTPLUG);
hotplug &= ~(PORTB_PULSE_DURATION_MASK |
PORTC_PULSE_DURATION_MASK |
PORTD_PULSE_DURATION_MASK);
hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
/*
* When CPU and PCH are on the same package, port A
* HPD must be enabled in both north and south.
*/
if (HAS_PCH_LPT_LP(dev_priv))
hotplug |= PORTA_HOTPLUG_ENABLE;
I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
}
static void ibx_hpd_irq_setup(struct drm_i915_private *dev_priv)
{
u32 hotplug_irqs, enabled_irqs;
if (HAS_PCH_IBX(dev_priv)) {
hotplug_irqs = SDE_HOTPLUG_MASK;
enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_ibx);
} else {
hotplug_irqs = SDE_HOTPLUG_MASK_CPT;
enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_cpt);
}
ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
ibx_hpd_detection_setup(dev_priv);
}
static void spt_hpd_detection_setup(struct drm_i915_private *dev_priv)
{
u32 hotplug;
/* Enable digital hotplug on the PCH */
hotplug = I915_READ(PCH_PORT_HOTPLUG);
hotplug |= PORTA_HOTPLUG_ENABLE |
PORTB_HOTPLUG_ENABLE |
PORTC_HOTPLUG_ENABLE |
PORTD_HOTPLUG_ENABLE;
I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
hotplug = I915_READ(PCH_PORT_HOTPLUG2);
hotplug |= PORTE_HOTPLUG_ENABLE;
I915_WRITE(PCH_PORT_HOTPLUG2, hotplug);
}
static void spt_hpd_irq_setup(struct drm_i915_private *dev_priv)
{
u32 hotplug_irqs, enabled_irqs;
hotplug_irqs = SDE_HOTPLUG_MASK_SPT;
enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_spt);
ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
spt_hpd_detection_setup(dev_priv);
}
static void ilk_hpd_detection_setup(struct drm_i915_private *dev_priv)
{
u32 hotplug;
/*
* Enable digital hotplug on the CPU, and configure the DP short pulse
* duration to 2ms (which is the minimum in the Display Port spec)
* The pulse duration bits are reserved on HSW+.
*/
hotplug = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
hotplug &= ~DIGITAL_PORTA_PULSE_DURATION_MASK;
hotplug |= DIGITAL_PORTA_HOTPLUG_ENABLE |
DIGITAL_PORTA_PULSE_DURATION_2ms;
I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, hotplug);
}
static void ilk_hpd_irq_setup(struct drm_i915_private *dev_priv)
{
u32 hotplug_irqs, enabled_irqs;
if (INTEL_GEN(dev_priv) >= 8) {
hotplug_irqs = GEN8_PORT_DP_A_HOTPLUG;
enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_bdw);
bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
} else if (INTEL_GEN(dev_priv) >= 7) {
hotplug_irqs = DE_DP_A_HOTPLUG_IVB;
enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_ivb);
ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
} else {
hotplug_irqs = DE_DP_A_HOTPLUG;
enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_ilk);
ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
}
ilk_hpd_detection_setup(dev_priv);
ibx_hpd_irq_setup(dev_priv);
}
static void __bxt_hpd_detection_setup(struct drm_i915_private *dev_priv,
u32 enabled_irqs)
{
u32 hotplug;
hotplug = I915_READ(PCH_PORT_HOTPLUG);
hotplug |= PORTA_HOTPLUG_ENABLE |
PORTB_HOTPLUG_ENABLE |
PORTC_HOTPLUG_ENABLE;
DRM_DEBUG_KMS("Invert bit setting: hp_ctl:%x hp_port:%x\n",
hotplug, enabled_irqs);
hotplug &= ~BXT_DDI_HPD_INVERT_MASK;
/*
* For BXT invert bit has to be set based on AOB design
* for HPD detection logic, update it based on VBT fields.
*/
if ((enabled_irqs & BXT_DE_PORT_HP_DDIA) &&
intel_bios_is_port_hpd_inverted(dev_priv, PORT_A))
hotplug |= BXT_DDIA_HPD_INVERT;
if ((enabled_irqs & BXT_DE_PORT_HP_DDIB) &&
intel_bios_is_port_hpd_inverted(dev_priv, PORT_B))
hotplug |= BXT_DDIB_HPD_INVERT;
if ((enabled_irqs & BXT_DE_PORT_HP_DDIC) &&
intel_bios_is_port_hpd_inverted(dev_priv, PORT_C))
hotplug |= BXT_DDIC_HPD_INVERT;
I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
}
static void bxt_hpd_detection_setup(struct drm_i915_private *dev_priv)
{
__bxt_hpd_detection_setup(dev_priv, BXT_DE_PORT_HOTPLUG_MASK);
}
static void bxt_hpd_irq_setup(struct drm_i915_private *dev_priv)
{
u32 hotplug_irqs, enabled_irqs;
enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_bxt);
hotplug_irqs = BXT_DE_PORT_HOTPLUG_MASK;
bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
__bxt_hpd_detection_setup(dev_priv, enabled_irqs);
}
static void ibx_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
u32 mask;
if (HAS_PCH_NOP(dev_priv))
return;
if (HAS_PCH_IBX(dev_priv))
mask = SDE_GMBUS | SDE_AUX_MASK | SDE_POISON;
else
mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
gen5_assert_iir_is_zero(dev_priv, SDEIIR);
I915_WRITE(SDEIMR, ~mask);
if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv) ||
HAS_PCH_LPT(dev_priv))
ibx_hpd_detection_setup(dev_priv);
else
spt_hpd_detection_setup(dev_priv);
}
static void gen5_gt_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
u32 pm_irqs, gt_irqs;
pm_irqs = gt_irqs = 0;
dev_priv->gt_irq_mask = ~0;
if (HAS_L3_DPF(dev_priv)) {
/* L3 parity interrupt is always unmasked. */
dev_priv->gt_irq_mask = ~GT_PARITY_ERROR(dev_priv);
gt_irqs |= GT_PARITY_ERROR(dev_priv);
}
gt_irqs |= GT_RENDER_USER_INTERRUPT;
if (IS_GEN5(dev_priv)) {
gt_irqs |= ILK_BSD_USER_INTERRUPT;
} else {
gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
}
GEN5_IRQ_INIT(GT, dev_priv->gt_irq_mask, gt_irqs);
if (INTEL_GEN(dev_priv) >= 6) {
/*
* RPS interrupts will get enabled/disabled on demand when RPS
* itself is enabled/disabled.
*/
if (HAS_VEBOX(dev_priv)) {
pm_irqs |= PM_VEBOX_USER_INTERRUPT;
dev_priv->pm_ier |= PM_VEBOX_USER_INTERRUPT;
}
dev_priv->pm_imr = 0xffffffff;
GEN5_IRQ_INIT(GEN6_PM, dev_priv->pm_imr, pm_irqs);
}
}
static int ironlake_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
u32 display_mask, extra_mask;
if (INTEL_GEN(dev_priv) >= 7) {
display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
DE_PCH_EVENT_IVB | DE_PLANEC_FLIP_DONE_IVB |
DE_PLANEB_FLIP_DONE_IVB |
DE_PLANEA_FLIP_DONE_IVB | DE_AUX_CHANNEL_A_IVB);
extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB |
DE_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB |
DE_DP_A_HOTPLUG_IVB);
} else {
display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
DE_AUX_CHANNEL_A |
DE_PIPEB_CRC_DONE | DE_PIPEA_CRC_DONE |
DE_POISON);
extra_mask = (DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT |
DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN |
DE_DP_A_HOTPLUG);
}
dev_priv->irq_mask = ~display_mask;
I915_WRITE(HWSTAM, 0xeffe);
ibx_irq_pre_postinstall(dev);
GEN5_IRQ_INIT(DE, dev_priv->irq_mask, display_mask | extra_mask);
gen5_gt_irq_postinstall(dev);
ilk_hpd_detection_setup(dev_priv);
ibx_irq_postinstall(dev);
if (IS_IRONLAKE_M(dev_priv)) {
/* Enable PCU event interrupts
*
* spinlocking not required here for correctness since interrupt
* setup is guaranteed to run in single-threaded context. But we
* need it to make the assert_spin_locked happy. */
spin_lock_irq(&dev_priv->irq_lock);
ilk_enable_display_irq(dev_priv, DE_PCU_EVENT);
spin_unlock_irq(&dev_priv->irq_lock);
}
return 0;
}
void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv)
{
assert_spin_locked(&dev_priv->irq_lock);
if (dev_priv->display_irqs_enabled)
return;
dev_priv->display_irqs_enabled = true;
if (intel_irqs_enabled(dev_priv)) {
vlv_display_irq_reset(dev_priv);
vlv_display_irq_postinstall(dev_priv);
}
}
void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)
{
assert_spin_locked(&dev_priv->irq_lock);
if (!dev_priv->display_irqs_enabled)
return;
dev_priv->display_irqs_enabled = false;
if (intel_irqs_enabled(dev_priv))
vlv_display_irq_reset(dev_priv);
}
static int valleyview_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
gen5_gt_irq_postinstall(dev);
spin_lock_irq(&dev_priv->irq_lock);
if (dev_priv->display_irqs_enabled)
vlv_display_irq_postinstall(dev_priv);
spin_unlock_irq(&dev_priv->irq_lock);
I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
POSTING_READ(VLV_MASTER_IER);
return 0;
}
static void gen8_gt_irq_postinstall(struct drm_i915_private *dev_priv)
{
/* These are interrupts we'll toggle with the ring mask register */
uint32_t gt_interrupts[] = {
GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
GT_CONTEXT_SWITCH_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT |
GT_CONTEXT_SWITCH_INTERRUPT << GEN8_BCS_IRQ_SHIFT,
GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT |
GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS2_IRQ_SHIFT,
0,
GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT |
GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VECS_IRQ_SHIFT
};
if (HAS_L3_DPF(dev_priv))
gt_interrupts[0] |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
dev_priv->pm_ier = 0x0;
dev_priv->pm_imr = ~dev_priv->pm_ier;
GEN8_IRQ_INIT_NDX(GT, 0, ~gt_interrupts[0], gt_interrupts[0]);
GEN8_IRQ_INIT_NDX(GT, 1, ~gt_interrupts[1], gt_interrupts[1]);
/*
* RPS interrupts will get enabled/disabled on demand when RPS itself
* is enabled/disabled. Same wil be the case for GuC interrupts.
*/
GEN8_IRQ_INIT_NDX(GT, 2, dev_priv->pm_imr, dev_priv->pm_ier);
GEN8_IRQ_INIT_NDX(GT, 3, ~gt_interrupts[3], gt_interrupts[3]);
}
static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
{
uint32_t de_pipe_masked = GEN8_PIPE_CDCLK_CRC_DONE;
uint32_t de_pipe_enables;
u32 de_port_masked = GEN8_AUX_CHANNEL_A;
u32 de_port_enables;
u32 de_misc_masked = GEN8_DE_MISC_GSE;
enum pipe pipe;
if (INTEL_INFO(dev_priv)->gen >= 9) {
de_pipe_masked |= GEN9_PIPE_PLANE1_FLIP_DONE |
GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
de_port_masked |= GEN9_AUX_CHANNEL_B | GEN9_AUX_CHANNEL_C |
GEN9_AUX_CHANNEL_D;
if (IS_GEN9_LP(dev_priv))
de_port_masked |= BXT_DE_PORT_GMBUS;
} else {
de_pipe_masked |= GEN8_PIPE_PRIMARY_FLIP_DONE |
GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
}
de_pipe_enables = de_pipe_masked | GEN8_PIPE_VBLANK |
GEN8_PIPE_FIFO_UNDERRUN;
de_port_enables = de_port_masked;
if (IS_GEN9_LP(dev_priv))
de_port_enables |= BXT_DE_PORT_HOTPLUG_MASK;
else if (IS_BROADWELL(dev_priv))
de_port_enables |= GEN8_PORT_DP_A_HOTPLUG;
dev_priv->de_irq_mask[PIPE_A] = ~de_pipe_masked;
dev_priv->de_irq_mask[PIPE_B] = ~de_pipe_masked;
dev_priv->de_irq_mask[PIPE_C] = ~de_pipe_masked;
for_each_pipe(dev_priv, pipe)
if (intel_display_power_is_enabled(dev_priv,
POWER_DOMAIN_PIPE(pipe)))
GEN8_IRQ_INIT_NDX(DE_PIPE, pipe,
dev_priv->de_irq_mask[pipe],
de_pipe_enables);
GEN5_IRQ_INIT(GEN8_DE_PORT_, ~de_port_masked, de_port_enables);
GEN5_IRQ_INIT(GEN8_DE_MISC_, ~de_misc_masked, de_misc_masked);
if (IS_GEN9_LP(dev_priv))
bxt_hpd_detection_setup(dev_priv);
else if (IS_BROADWELL(dev_priv))
ilk_hpd_detection_setup(dev_priv);
}
static int gen8_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
if (HAS_PCH_SPLIT(dev_priv))
ibx_irq_pre_postinstall(dev);
gen8_gt_irq_postinstall(dev_priv);
gen8_de_irq_postinstall(dev_priv);
if (HAS_PCH_SPLIT(dev_priv))
ibx_irq_postinstall(dev);
I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
POSTING_READ(GEN8_MASTER_IRQ);
return 0;
}
static int cherryview_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
gen8_gt_irq_postinstall(dev_priv);
spin_lock_irq(&dev_priv->irq_lock);
if (dev_priv->display_irqs_enabled)
vlv_display_irq_postinstall(dev_priv);
spin_unlock_irq(&dev_priv->irq_lock);
I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
POSTING_READ(GEN8_MASTER_IRQ);
return 0;
}
static void gen8_irq_uninstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
if (!dev_priv)
return;
gen8_irq_reset(dev);
}
static void valleyview_irq_uninstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
if (!dev_priv)
return;
I915_WRITE(VLV_MASTER_IER, 0);
POSTING_READ(VLV_MASTER_IER);
gen5_gt_irq_reset(dev_priv);
I915_WRITE(HWSTAM, 0xffffffff);
spin_lock_irq(&dev_priv->irq_lock);
if (dev_priv->display_irqs_enabled)
vlv_display_irq_reset(dev_priv);
spin_unlock_irq(&dev_priv->irq_lock);
}
static void cherryview_irq_uninstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
if (!dev_priv)
return;
I915_WRITE(GEN8_MASTER_IRQ, 0);
POSTING_READ(GEN8_MASTER_IRQ);
gen8_gt_irq_reset(dev_priv);
GEN5_IRQ_RESET(GEN8_PCU_);
spin_lock_irq(&dev_priv->irq_lock);
if (dev_priv->display_irqs_enabled)
vlv_display_irq_reset(dev_priv);
spin_unlock_irq(&dev_priv->irq_lock);
}
static void ironlake_irq_uninstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
if (!dev_priv)
return;
ironlake_irq_reset(dev);
}
static void i8xx_irq_preinstall(struct drm_device * dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
int pipe;
for_each_pipe(dev_priv, pipe)
I915_WRITE(PIPESTAT(pipe), 0);
I915_WRITE16(IMR, 0xffff);
I915_WRITE16(IER, 0x0);
POSTING_READ16(IER);
}
static int i8xx_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
I915_WRITE16(EMR,
~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
/* Unmask the interrupts that we always want on. */
dev_priv->irq_mask =
~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
I915_WRITE16(IMR, dev_priv->irq_mask);
I915_WRITE16(IER,
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
I915_USER_INTERRUPT);
POSTING_READ16(IER);
/* Interrupt setup is already guaranteed to be single-threaded, this is
* just to make the assert_spin_locked check happy. */
spin_lock_irq(&dev_priv->irq_lock);
i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
spin_unlock_irq(&dev_priv->irq_lock);
return 0;
}
/*
* Returns true when a page flip has completed.
*/
static bool i8xx_handle_vblank(struct drm_i915_private *dev_priv,
int plane, int pipe, u32 iir)
{
u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
if (!intel_pipe_handle_vblank(dev_priv, pipe))
return false;
if ((iir & flip_pending) == 0)
goto check_page_flip;
/* We detect FlipDone by looking for the change in PendingFlip from '1'
* to '0' on the following vblank, i.e. IIR has the Pendingflip
* asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
* the flip is completed (no longer pending). Since this doesn't raise
* an interrupt per se, we watch for the change at vblank.
*/
if (I915_READ16(ISR) & flip_pending)
goto check_page_flip;
intel_finish_page_flip_cs(dev_priv, pipe);
return true;
check_page_flip:
intel_check_page_flip(dev_priv, pipe);
return false;
}
static irqreturn_t i8xx_irq_handler(int irq, void *arg)
{
struct drm_device *dev = arg;
struct drm_i915_private *dev_priv = to_i915(dev);
u16 iir, new_iir;
u32 pipe_stats[2];
int pipe;
u16 flip_mask =
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
irqreturn_t ret;
if (!intel_irqs_enabled(dev_priv))
return IRQ_NONE;
/* IRQs are synced during runtime_suspend, we don't require a wakeref */
disable_rpm_wakeref_asserts(dev_priv);
ret = IRQ_NONE;
iir = I915_READ16(IIR);
if (iir == 0)
goto out;
while (iir & ~flip_mask) {
/* Can't rely on pipestat interrupt bit in iir as it might
* have been cleared after the pipestat interrupt was received.
* It doesn't set the bit in iir again, but it still produces
* interrupts (for non-MSI).
*/
spin_lock(&dev_priv->irq_lock);
if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
DRM_DEBUG("Command parser error, iir 0x%08x\n", iir);
for_each_pipe(dev_priv, pipe) {
i915_reg_t reg = PIPESTAT(pipe);
pipe_stats[pipe] = I915_READ(reg);
/*
* Clear the PIPE*STAT regs before the IIR
*/
if (pipe_stats[pipe] & 0x8000ffff)
I915_WRITE(reg, pipe_stats[pipe]);
}
spin_unlock(&dev_priv->irq_lock);
I915_WRITE16(IIR, iir & ~flip_mask);
new_iir = I915_READ16(IIR); /* Flush posted writes */
if (iir & I915_USER_INTERRUPT)
notify_ring(dev_priv->engine[RCS]);
for_each_pipe(dev_priv, pipe) {
int plane = pipe;
if (HAS_FBC(dev_priv))
plane = !plane;
if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
i8xx_handle_vblank(dev_priv, plane, pipe, iir))
flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
i9xx_pipe_crc_irq_handler(dev_priv, pipe);
if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
intel_cpu_fifo_underrun_irq_handler(dev_priv,
pipe);
}
iir = new_iir;
}
ret = IRQ_HANDLED;
out:
enable_rpm_wakeref_asserts(dev_priv);
return ret;
}
static void i8xx_irq_uninstall(struct drm_device * dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
int pipe;
for_each_pipe(dev_priv, pipe) {
/* Clear enable bits; then clear status bits */
I915_WRITE(PIPESTAT(pipe), 0);
I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
}
I915_WRITE16(IMR, 0xffff);
I915_WRITE16(IER, 0x0);
I915_WRITE16(IIR, I915_READ16(IIR));
}
static void i915_irq_preinstall(struct drm_device * dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
int pipe;
if (I915_HAS_HOTPLUG(dev_priv)) {
i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
}
I915_WRITE16(HWSTAM, 0xeffe);
for_each_pipe(dev_priv, pipe)
I915_WRITE(PIPESTAT(pipe), 0);
I915_WRITE(IMR, 0xffffffff);
I915_WRITE(IER, 0x0);
POSTING_READ(IER);
}
static int i915_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
u32 enable_mask;
I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
/* Unmask the interrupts that we always want on. */
dev_priv->irq_mask =
~(I915_ASLE_INTERRUPT |
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
enable_mask =
I915_ASLE_INTERRUPT |
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
I915_USER_INTERRUPT;
if (I915_HAS_HOTPLUG(dev_priv)) {
i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
POSTING_READ(PORT_HOTPLUG_EN);
/* Enable in IER... */
enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
/* and unmask in IMR */
dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
}
I915_WRITE(IMR, dev_priv->irq_mask);
I915_WRITE(IER, enable_mask);
POSTING_READ(IER);
i915_enable_asle_pipestat(dev_priv);
/* Interrupt setup is already guaranteed to be single-threaded, this is
* just to make the assert_spin_locked check happy. */
spin_lock_irq(&dev_priv->irq_lock);
i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
spin_unlock_irq(&dev_priv->irq_lock);
return 0;
}
/*
* Returns true when a page flip has completed.
*/
static bool i915_handle_vblank(struct drm_i915_private *dev_priv,
int plane, int pipe, u32 iir)
{
u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
if (!intel_pipe_handle_vblank(dev_priv, pipe))
return false;
if ((iir & flip_pending) == 0)
goto check_page_flip;
/* We detect FlipDone by looking for the change in PendingFlip from '1'
* to '0' on the following vblank, i.e. IIR has the Pendingflip
* asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
* the flip is completed (no longer pending). Since this doesn't raise
* an interrupt per se, we watch for the change at vblank.
*/
if (I915_READ(ISR) & flip_pending)
goto check_page_flip;
intel_finish_page_flip_cs(dev_priv, pipe);
return true;
check_page_flip:
intel_check_page_flip(dev_priv, pipe);
return false;
}
static irqreturn_t i915_irq_handler(int irq, void *arg)
{
struct drm_device *dev = arg;
struct drm_i915_private *dev_priv = to_i915(dev);
u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
u32 flip_mask =
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
int pipe, ret = IRQ_NONE;
if (!intel_irqs_enabled(dev_priv))
return IRQ_NONE;
/* IRQs are synced during runtime_suspend, we don't require a wakeref */
disable_rpm_wakeref_asserts(dev_priv);
iir = I915_READ(IIR);
do {
bool irq_received = (iir & ~flip_mask) != 0;
bool blc_event = false;
/* Can't rely on pipestat interrupt bit in iir as it might
* have been cleared after the pipestat interrupt was received.
* It doesn't set the bit in iir again, but it still produces
* interrupts (for non-MSI).
*/
spin_lock(&dev_priv->irq_lock);
if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
DRM_DEBUG("Command parser error, iir 0x%08x\n", iir);
for_each_pipe(dev_priv, pipe) {
i915_reg_t reg = PIPESTAT(pipe);
pipe_stats[pipe] = I915_READ(reg);
/* Clear the PIPE*STAT regs before the IIR */
if (pipe_stats[pipe] & 0x8000ffff) {
I915_WRITE(reg, pipe_stats[pipe]);
irq_received = true;
}
}
spin_unlock(&dev_priv->irq_lock);
if (!irq_received)
break;
/* Consume port. Then clear IIR or we'll miss events */
if (I915_HAS_HOTPLUG(dev_priv) &&
iir & I915_DISPLAY_PORT_INTERRUPT) {
u32 hotplug_status = i9xx_hpd_irq_ack(dev_priv);
if (hotplug_status)
i9xx_hpd_irq_handler(dev_priv, hotplug_status);
}
I915_WRITE(IIR, iir & ~flip_mask);
new_iir = I915_READ(IIR); /* Flush posted writes */
if (iir & I915_USER_INTERRUPT)
notify_ring(dev_priv->engine[RCS]);
for_each_pipe(dev_priv, pipe) {
int plane = pipe;
if (HAS_FBC(dev_priv))
plane = !plane;
if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
i915_handle_vblank(dev_priv, plane, pipe, iir))
flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
blc_event = true;
if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
i9xx_pipe_crc_irq_handler(dev_priv, pipe);
if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
intel_cpu_fifo_underrun_irq_handler(dev_priv,
pipe);
}
if (blc_event || (iir & I915_ASLE_INTERRUPT))
intel_opregion_asle_intr(dev_priv);
/* With MSI, interrupts are only generated when iir
* transitions from zero to nonzero. If another bit got
* set while we were handling the existing iir bits, then
* we would never get another interrupt.
*
* This is fine on non-MSI as well, as if we hit this path
* we avoid exiting the interrupt handler only to generate
* another one.
*
* Note that for MSI this could cause a stray interrupt report
* if an interrupt landed in the time between writing IIR and
* the posting read. This should be rare enough to never
* trigger the 99% of 100,000 interrupts test for disabling
* stray interrupts.
*/
ret = IRQ_HANDLED;
iir = new_iir;
} while (iir & ~flip_mask);
enable_rpm_wakeref_asserts(dev_priv);
return ret;
}
static void i915_irq_uninstall(struct drm_device * dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
int pipe;
if (I915_HAS_HOTPLUG(dev_priv)) {
i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
}
I915_WRITE16(HWSTAM, 0xffff);
for_each_pipe(dev_priv, pipe) {
/* Clear enable bits; then clear status bits */
I915_WRITE(PIPESTAT(pipe), 0);
I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
}
I915_WRITE(IMR, 0xffffffff);
I915_WRITE(IER, 0x0);
I915_WRITE(IIR, I915_READ(IIR));
}
static void i965_irq_preinstall(struct drm_device * dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
int pipe;
i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
I915_WRITE(HWSTAM, 0xeffe);
for_each_pipe(dev_priv, pipe)
I915_WRITE(PIPESTAT(pipe), 0);
I915_WRITE(IMR, 0xffffffff);
I915_WRITE(IER, 0x0);
POSTING_READ(IER);
}
static int i965_irq_postinstall(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
u32 enable_mask;
u32 error_mask;
/* Unmask the interrupts that we always want on. */
dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
I915_DISPLAY_PORT_INTERRUPT |
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
enable_mask = ~dev_priv->irq_mask;
enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
enable_mask |= I915_USER_INTERRUPT;
if (IS_G4X(dev_priv))
enable_mask |= I915_BSD_USER_INTERRUPT;
/* Interrupt setup is already guaranteed to be single-threaded, this is
* just to make the assert_spin_locked check happy. */
spin_lock_irq(&dev_priv->irq_lock);
i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
spin_unlock_irq(&dev_priv->irq_lock);
/*
* Enable some error detection, note the instruction error mask
* bit is reserved, so we leave it masked.
*/
if (IS_G4X(dev_priv)) {
error_mask = ~(GM45_ERROR_PAGE_TABLE |
GM45_ERROR_MEM_PRIV |
GM45_ERROR_CP_PRIV |
I915_ERROR_MEMORY_REFRESH);
} else {
error_mask = ~(I915_ERROR_PAGE_TABLE |
I915_ERROR_MEMORY_REFRESH);
}
I915_WRITE(EMR, error_mask);
I915_WRITE(IMR, dev_priv->irq_mask);
I915_WRITE(IER, enable_mask);
POSTING_READ(IER);
i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
POSTING_READ(PORT_HOTPLUG_EN);
i915_enable_asle_pipestat(dev_priv);
return 0;
}
static void i915_hpd_irq_setup(struct drm_i915_private *dev_priv)
{
u32 hotplug_en;
assert_spin_locked(&dev_priv->irq_lock);
/* Note HDMI and DP share hotplug bits */
/* enable bits are the same for all generations */
hotplug_en = intel_hpd_enabled_irqs(dev_priv, hpd_mask_i915);
/* Programming the CRT detection parameters tends
to generate a spurious hotplug event about three
seconds later. So just do it once.
*/
if (IS_G4X(dev_priv))
hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
/* Ignore TV since it's buggy */
i915_hotplug_interrupt_update_locked(dev_priv,
HOTPLUG_INT_EN_MASK |
CRT_HOTPLUG_VOLTAGE_COMPARE_MASK |
CRT_HOTPLUG_ACTIVATION_PERIOD_64,
hotplug_en);
}
static irqreturn_t i965_irq_handler(int irq, void *arg)
{
struct drm_device *dev = arg;
struct drm_i915_private *dev_priv = to_i915(dev);
u32 iir, new_iir;
u32 pipe_stats[I915_MAX_PIPES];
int ret = IRQ_NONE, pipe;
u32 flip_mask =
I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
if (!intel_irqs_enabled(dev_priv))
return IRQ_NONE;
/* IRQs are synced during runtime_suspend, we don't require a wakeref */
disable_rpm_wakeref_asserts(dev_priv);
iir = I915_READ(IIR);
for (;;) {
bool irq_received = (iir & ~flip_mask) != 0;
bool blc_event = false;
/* Can't rely on pipestat interrupt bit in iir as it might
* have been cleared after the pipestat interrupt was received.
* It doesn't set the bit in iir again, but it still produces
* interrupts (for non-MSI).
*/
spin_lock(&dev_priv->irq_lock);
if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
DRM_DEBUG("Command parser error, iir 0x%08x\n", iir);
for_each_pipe(dev_priv, pipe) {
i915_reg_t reg = PIPESTAT(pipe);
pipe_stats[pipe] = I915_READ(reg);
/*
* Clear the PIPE*STAT regs before the IIR
*/
if (pipe_stats[pipe] & 0x8000ffff) {
I915_WRITE(reg, pipe_stats[pipe]);
irq_received = true;
}
}
spin_unlock(&dev_priv->irq_lock);
if (!irq_received)
break;
ret = IRQ_HANDLED;
/* Consume port. Then clear IIR or we'll miss events */
if (iir & I915_DISPLAY_PORT_INTERRUPT) {
u32 hotplug_status = i9xx_hpd_irq_ack(dev_priv);
if (hotplug_status)
i9xx_hpd_irq_handler(dev_priv, hotplug_status);
}
I915_WRITE(IIR, iir & ~flip_mask);
new_iir = I915_READ(IIR); /* Flush posted writes */
if (iir & I915_USER_INTERRUPT)
notify_ring(dev_priv->engine[RCS]);
if (iir & I915_BSD_USER_INTERRUPT)
notify_ring(dev_priv->engine[VCS]);
for_each_pipe(dev_priv, pipe) {
if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
i915_handle_vblank(dev_priv, pipe, pipe, iir))
flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
blc_event = true;
if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
i9xx_pipe_crc_irq_handler(dev_priv, pipe);
if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
}
if (blc_event || (iir & I915_ASLE_INTERRUPT))
intel_opregion_asle_intr(dev_priv);
if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
gmbus_irq_handler(dev_priv);
/* With MSI, interrupts are only generated when iir
* transitions from zero to nonzero. If another bit got
* set while we were handling the existing iir bits, then
* we would never get another interrupt.
*
* This is fine on non-MSI as well, as if we hit this path
* we avoid exiting the interrupt handler only to generate
* another one.
*
* Note that for MSI this could cause a stray interrupt report
* if an interrupt landed in the time between writing IIR and
* the posting read. This should be rare enough to never
* trigger the 99% of 100,000 interrupts test for disabling
* stray interrupts.
*/
iir = new_iir;
}
enable_rpm_wakeref_asserts(dev_priv);
return ret;
}
static void i965_irq_uninstall(struct drm_device * dev)
{
struct drm_i915_private *dev_priv = to_i915(dev);
int pipe;
if (!dev_priv)
return;
i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
I915_WRITE(HWSTAM, 0xffffffff);
for_each_pipe(dev_priv, pipe)
I915_WRITE(PIPESTAT(pipe), 0);
I915_WRITE(IMR, 0xffffffff);
I915_WRITE(IER, 0x0);
for_each_pipe(dev_priv, pipe)
I915_WRITE(PIPESTAT(pipe),
I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
I915_WRITE(IIR, I915_READ(IIR));
}
/**
* intel_irq_init - initializes irq support
* @dev_priv: i915 device instance
*
* This function initializes all the irq support including work items, timers
* and all the vtables. It does not setup the interrupt itself though.
*/
void intel_irq_init(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = &dev_priv->drm;
intel_hpd_init_work(dev_priv);
INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
if (HAS_GUC_SCHED(dev_priv))
dev_priv->pm_guc_events = GEN9_GUC_TO_HOST_INT_EVENT;
/* Let's track the enabled rps events */
if (IS_VALLEYVIEW(dev_priv))
/* WaGsvRC0ResidencyMethod:vlv */
dev_priv->pm_rps_events = GEN6_PM_RP_DOWN_EI_EXPIRED | GEN6_PM_RP_UP_EI_EXPIRED;
else
dev_priv->pm_rps_events = GEN6_PM_RPS_EVENTS;
dev_priv->rps.pm_intr_keep = 0;
/*
* SNB,IVB can while VLV,CHV may hard hang on looping batchbuffer
* if GEN6_PM_UP_EI_EXPIRED is masked.
*
* TODO: verify if this can be reproduced on VLV,CHV.
*/
if (INTEL_INFO(dev_priv)->gen <= 7 && !IS_HASWELL(dev_priv))
dev_priv->rps.pm_intr_keep |= GEN6_PM_RP_UP_EI_EXPIRED;
if (INTEL_INFO(dev_priv)->gen >= 8)
dev_priv->rps.pm_intr_keep |= GEN8_PMINTR_REDIRECT_TO_GUC;
if (IS_GEN2(dev_priv)) {
/* Gen2 doesn't have a hardware frame counter */
dev->max_vblank_count = 0;
dev->driver->get_vblank_counter = drm_vblank_no_hw_counter;
} else if (IS_G4X(dev_priv) || INTEL_INFO(dev_priv)->gen >= 5) {
dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
dev->driver->get_vblank_counter = g4x_get_vblank_counter;
} else {
dev->driver->get_vblank_counter = i915_get_vblank_counter;
dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
}
/*
* Opt out of the vblank disable timer on everything except gen2.
* Gen2 doesn't have a hardware frame counter and so depends on
* vblank interrupts to produce sane vblank seuquence numbers.
*/
if (!IS_GEN2(dev_priv))
dev->vblank_disable_immediate = true;
/* Most platforms treat the display irq block as an always-on
* power domain. vlv/chv can disable it at runtime and need
* special care to avoid writing any of the display block registers
* outside of the power domain. We defer setting up the display irqs
* in this case to the runtime pm.
*/
dev_priv->display_irqs_enabled = true;
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
dev_priv->display_irqs_enabled = false;
dev_priv->hotplug.hpd_storm_threshold = HPD_STORM_DEFAULT_THRESHOLD;
dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
if (IS_CHERRYVIEW(dev_priv)) {
dev->driver->irq_handler = cherryview_irq_handler;
dev->driver->irq_preinstall = cherryview_irq_preinstall;
dev->driver->irq_postinstall = cherryview_irq_postinstall;
dev->driver->irq_uninstall = cherryview_irq_uninstall;
dev->driver->enable_vblank = i965_enable_vblank;
dev->driver->disable_vblank = i965_disable_vblank;
dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
} else if (IS_VALLEYVIEW(dev_priv)) {
dev->driver->irq_handler = valleyview_irq_handler;
dev->driver->irq_preinstall = valleyview_irq_preinstall;
dev->driver->irq_postinstall = valleyview_irq_postinstall;
dev->driver->irq_uninstall = valleyview_irq_uninstall;
dev->driver->enable_vblank = i965_enable_vblank;
dev->driver->disable_vblank = i965_disable_vblank;
dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
} else if (INTEL_INFO(dev_priv)->gen >= 8) {
dev->driver->irq_handler = gen8_irq_handler;
dev->driver->irq_preinstall = gen8_irq_reset;
dev->driver->irq_postinstall = gen8_irq_postinstall;
dev->driver->irq_uninstall = gen8_irq_uninstall;
dev->driver->enable_vblank = gen8_enable_vblank;
dev->driver->disable_vblank = gen8_disable_vblank;
if (IS_GEN9_LP(dev_priv))
dev_priv->display.hpd_irq_setup = bxt_hpd_irq_setup;
else if (HAS_PCH_SPT(dev_priv) || HAS_PCH_KBP(dev_priv))
dev_priv->display.hpd_irq_setup = spt_hpd_irq_setup;
else
dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
} else if (HAS_PCH_SPLIT(dev_priv)) {
dev->driver->irq_handler = ironlake_irq_handler;
dev->driver->irq_preinstall = ironlake_irq_reset;
dev->driver->irq_postinstall = ironlake_irq_postinstall;
dev->driver->irq_uninstall = ironlake_irq_uninstall;
dev->driver->enable_vblank = ironlake_enable_vblank;
dev->driver->disable_vblank = ironlake_disable_vblank;
dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
} else {
if (IS_GEN2(dev_priv)) {
dev->driver->irq_preinstall = i8xx_irq_preinstall;
dev->driver->irq_postinstall = i8xx_irq_postinstall;
dev->driver->irq_handler = i8xx_irq_handler;
dev->driver->irq_uninstall = i8xx_irq_uninstall;
dev->driver->enable_vblank = i8xx_enable_vblank;
dev->driver->disable_vblank = i8xx_disable_vblank;
} else if (IS_GEN3(dev_priv)) {
dev->driver->irq_preinstall = i915_irq_preinstall;
dev->driver->irq_postinstall = i915_irq_postinstall;
dev->driver->irq_uninstall = i915_irq_uninstall;
dev->driver->irq_handler = i915_irq_handler;
dev->driver->enable_vblank = i8xx_enable_vblank;
dev->driver->disable_vblank = i8xx_disable_vblank;
} else {
dev->driver->irq_preinstall = i965_irq_preinstall;
dev->driver->irq_postinstall = i965_irq_postinstall;
dev->driver->irq_uninstall = i965_irq_uninstall;
dev->driver->irq_handler = i965_irq_handler;
dev->driver->enable_vblank = i965_enable_vblank;
dev->driver->disable_vblank = i965_disable_vblank;
}
if (I915_HAS_HOTPLUG(dev_priv))
dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
}
}
/**
* intel_irq_install - enables the hardware interrupt
* @dev_priv: i915 device instance
*
* This function enables the hardware interrupt handling, but leaves the hotplug
* handling still disabled. It is called after intel_irq_init().
*
* In the driver load and resume code we need working interrupts in a few places
* but don't want to deal with the hassle of concurrent probe and hotplug
* workers. Hence the split into this two-stage approach.
*/
int intel_irq_install(struct drm_i915_private *dev_priv)
{
/*
* We enable some interrupt sources in our postinstall hooks, so mark
* interrupts as enabled _before_ actually enabling them to avoid
* special cases in our ordering checks.
*/
dev_priv->pm.irqs_enabled = true;
return drm_irq_install(&dev_priv->drm, dev_priv->drm.pdev->irq);
}
/**
* intel_irq_uninstall - finilizes all irq handling
* @dev_priv: i915 device instance
*
* This stops interrupt and hotplug handling and unregisters and frees all
* resources acquired in the init functions.
*/
void intel_irq_uninstall(struct drm_i915_private *dev_priv)
{
drm_irq_uninstall(&dev_priv->drm);
intel_hpd_cancel_work(dev_priv);
dev_priv->pm.irqs_enabled = false;
}
/**
* intel_runtime_pm_disable_interrupts - runtime interrupt disabling
* @dev_priv: i915 device instance
*
* This function is used to disable interrupts at runtime, both in the runtime
* pm and the system suspend/resume code.
*/
void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv)
{
dev_priv->drm.driver->irq_uninstall(&dev_priv->drm);
dev_priv->pm.irqs_enabled = false;
synchronize_irq(dev_priv->drm.irq);
}
/**
* intel_runtime_pm_enable_interrupts - runtime interrupt enabling
* @dev_priv: i915 device instance
*
* This function is used to enable interrupts at runtime, both in the runtime
* pm and the system suspend/resume code.
*/
void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv)
{
dev_priv->pm.irqs_enabled = true;
dev_priv->drm.driver->irq_preinstall(&dev_priv->drm);
dev_priv->drm.driver->irq_postinstall(&dev_priv->drm);
}
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