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OpenCloudOS-Kernel/drivers/gpu/drm/i915/intel_uncore.c

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/*
* Copyright © 2013 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <linux/pm_runtime.h>
#include <asm/iosf_mbi.h>
#include "i915_drv.h"
#include "i915_vgpu.h"
#include "intel_drv.h"
#include "intel_pm.h"
#define FORCEWAKE_ACK_TIMEOUT_MS 50
#define GT_FIFO_TIMEOUT_MS 10
#define __raw_posting_read(...) ((void)__raw_uncore_read32(__VA_ARGS__))
static const char * const forcewake_domain_names[] = {
"render",
"blitter",
"media",
"vdbox0",
"vdbox1",
"vdbox2",
"vdbox3",
"vebox0",
"vebox1",
};
const char *
intel_uncore_forcewake_domain_to_str(const enum forcewake_domain_id id)
{
BUILD_BUG_ON(ARRAY_SIZE(forcewake_domain_names) != FW_DOMAIN_ID_COUNT);
if (id >= 0 && id < FW_DOMAIN_ID_COUNT)
return forcewake_domain_names[id];
WARN_ON(id);
return "unknown";
}
#define fw_ack(d) readl((d)->reg_ack)
#define fw_set(d, val) writel(_MASKED_BIT_ENABLE((val)), (d)->reg_set)
#define fw_clear(d, val) writel(_MASKED_BIT_DISABLE((val)), (d)->reg_set)
static inline void
fw_domain_reset(const struct intel_uncore_forcewake_domain *d)
{
/*
* We don't really know if the powerwell for the forcewake domain we are
* trying to reset here does exist at this point (engines could be fused
* off in ICL+), so no waiting for acks
*/
/* WaRsClearFWBitsAtReset:bdw,skl */
fw_clear(d, 0xffff);
}
static inline void
fw_domain_arm_timer(struct intel_uncore_forcewake_domain *d)
{
GEM_BUG_ON(d->uncore->fw_domains_timer & d->mask);
d->uncore->fw_domains_timer |= d->mask;
d->wake_count++;
hrtimer_start_range_ns(&d->timer,
NSEC_PER_MSEC,
NSEC_PER_MSEC,
HRTIMER_MODE_REL);
}
static inline int
__wait_for_ack(const struct intel_uncore_forcewake_domain *d,
const u32 ack,
const u32 value)
{
return wait_for_atomic((fw_ack(d) & ack) == value,
FORCEWAKE_ACK_TIMEOUT_MS);
}
static inline int
wait_ack_clear(const struct intel_uncore_forcewake_domain *d,
const u32 ack)
{
return __wait_for_ack(d, ack, 0);
}
static inline int
wait_ack_set(const struct intel_uncore_forcewake_domain *d,
const u32 ack)
{
return __wait_for_ack(d, ack, ack);
}
static inline void
fw_domain_wait_ack_clear(const struct intel_uncore_forcewake_domain *d)
{
if (wait_ack_clear(d, FORCEWAKE_KERNEL)) {
DRM_ERROR("%s: timed out waiting for forcewake ack to clear.\n",
intel_uncore_forcewake_domain_to_str(d->id));
add_taint_for_CI(TAINT_WARN); /* CI now unreliable */
}
}
enum ack_type {
ACK_CLEAR = 0,
ACK_SET
};
static int
fw_domain_wait_ack_with_fallback(const struct intel_uncore_forcewake_domain *d,
const enum ack_type type)
{
const u32 ack_bit = FORCEWAKE_KERNEL;
const u32 value = type == ACK_SET ? ack_bit : 0;
unsigned int pass;
bool ack_detected;
/*
* There is a possibility of driver's wake request colliding
* with hardware's own wake requests and that can cause
* hardware to not deliver the driver's ack message.
*
* Use a fallback bit toggle to kick the gpu state machine
* in the hope that the original ack will be delivered along with
* the fallback ack.
*
* This workaround is described in HSDES #1604254524 and it's known as:
* WaRsForcewakeAddDelayForAck:skl,bxt,kbl,glk,cfl,cnl,icl
* although the name is a bit misleading.
*/
pass = 1;
do {
wait_ack_clear(d, FORCEWAKE_KERNEL_FALLBACK);
fw_set(d, FORCEWAKE_KERNEL_FALLBACK);
/* Give gt some time to relax before the polling frenzy */
udelay(10 * pass);
wait_ack_set(d, FORCEWAKE_KERNEL_FALLBACK);
ack_detected = (fw_ack(d) & ack_bit) == value;
fw_clear(d, FORCEWAKE_KERNEL_FALLBACK);
} while (!ack_detected && pass++ < 10);
DRM_DEBUG_DRIVER("%s had to use fallback to %s ack, 0x%x (passes %u)\n",
intel_uncore_forcewake_domain_to_str(d->id),
type == ACK_SET ? "set" : "clear",
fw_ack(d),
pass);
return ack_detected ? 0 : -ETIMEDOUT;
}
static inline void
fw_domain_wait_ack_clear_fallback(const struct intel_uncore_forcewake_domain *d)
{
if (likely(!wait_ack_clear(d, FORCEWAKE_KERNEL)))
return;
if (fw_domain_wait_ack_with_fallback(d, ACK_CLEAR))
fw_domain_wait_ack_clear(d);
}
static inline void
fw_domain_get(const struct intel_uncore_forcewake_domain *d)
{
fw_set(d, FORCEWAKE_KERNEL);
}
static inline void
fw_domain_wait_ack_set(const struct intel_uncore_forcewake_domain *d)
{
if (wait_ack_set(d, FORCEWAKE_KERNEL)) {
DRM_ERROR("%s: timed out waiting for forcewake ack request.\n",
intel_uncore_forcewake_domain_to_str(d->id));
add_taint_for_CI(TAINT_WARN); /* CI now unreliable */
}
}
static inline void
fw_domain_wait_ack_set_fallback(const struct intel_uncore_forcewake_domain *d)
{
if (likely(!wait_ack_set(d, FORCEWAKE_KERNEL)))
return;
if (fw_domain_wait_ack_with_fallback(d, ACK_SET))
fw_domain_wait_ack_set(d);
}
static inline void
fw_domain_put(const struct intel_uncore_forcewake_domain *d)
{
fw_clear(d, FORCEWAKE_KERNEL);
}
static void
fw_domains_get(struct intel_uncore *uncore, enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *d;
unsigned int tmp;
GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
for_each_fw_domain_masked(d, fw_domains, uncore, tmp) {
fw_domain_wait_ack_clear(d);
fw_domain_get(d);
}
for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
fw_domain_wait_ack_set(d);
uncore->fw_domains_active |= fw_domains;
}
static void
fw_domains_get_with_fallback(struct intel_uncore *uncore,
enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *d;
unsigned int tmp;
GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
for_each_fw_domain_masked(d, fw_domains, uncore, tmp) {
fw_domain_wait_ack_clear_fallback(d);
fw_domain_get(d);
}
for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
fw_domain_wait_ack_set_fallback(d);
uncore->fw_domains_active |= fw_domains;
}
static void
fw_domains_put(struct intel_uncore *uncore, enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *d;
unsigned int tmp;
GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
fw_domain_put(d);
uncore->fw_domains_active &= ~fw_domains;
}
static void
fw_domains_reset(struct intel_uncore *uncore,
enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *d;
unsigned int tmp;
if (!fw_domains)
return;
GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
for_each_fw_domain_masked(d, fw_domains, uncore, tmp)
fw_domain_reset(d);
}
static inline u32 gt_thread_status(struct intel_uncore *uncore)
{
u32 val;
val = __raw_uncore_read32(uncore, GEN6_GT_THREAD_STATUS_REG);
val &= GEN6_GT_THREAD_STATUS_CORE_MASK;
return val;
}
static void __gen6_gt_wait_for_thread_c0(struct intel_uncore *uncore)
{
/*
* w/a for a sporadic read returning 0 by waiting for the GT
* thread to wake up.
*/
WARN_ONCE(wait_for_atomic_us(gt_thread_status(uncore) == 0, 5000),
"GT thread status wait timed out\n");
}
static void fw_domains_get_with_thread_status(struct intel_uncore *uncore,
enum forcewake_domains fw_domains)
{
fw_domains_get(uncore, fw_domains);
/* WaRsForcewakeWaitTC0:snb,ivb,hsw,bdw,vlv */
__gen6_gt_wait_for_thread_c0(uncore);
}
static inline u32 fifo_free_entries(struct intel_uncore *uncore)
{
u32 count = __raw_uncore_read32(uncore, GTFIFOCTL);
return count & GT_FIFO_FREE_ENTRIES_MASK;
}
static void __gen6_gt_wait_for_fifo(struct intel_uncore *uncore)
{
u32 n;
/* On VLV, FIFO will be shared by both SW and HW.
* So, we need to read the FREE_ENTRIES everytime */
if (IS_VALLEYVIEW(uncore->i915))
n = fifo_free_entries(uncore);
else
n = uncore->fifo_count;
if (n <= GT_FIFO_NUM_RESERVED_ENTRIES) {
if (wait_for_atomic((n = fifo_free_entries(uncore)) >
GT_FIFO_NUM_RESERVED_ENTRIES,
GT_FIFO_TIMEOUT_MS)) {
DRM_DEBUG("GT_FIFO timeout, entries: %u\n", n);
return;
}
}
uncore->fifo_count = n - 1;
}
static enum hrtimer_restart
intel_uncore_fw_release_timer(struct hrtimer *timer)
{
struct intel_uncore_forcewake_domain *domain =
container_of(timer, struct intel_uncore_forcewake_domain, timer);
struct intel_uncore *uncore = domain->uncore;
unsigned long irqflags;
assert_rpm_device_not_suspended(uncore->rpm);
if (xchg(&domain->active, false))
return HRTIMER_RESTART;
spin_lock_irqsave(&uncore->lock, irqflags);
uncore->fw_domains_timer &= ~domain->mask;
GEM_BUG_ON(!domain->wake_count);
if (--domain->wake_count == 0)
uncore->funcs.force_wake_put(uncore, domain->mask);
spin_unlock_irqrestore(&uncore->lock, irqflags);
return HRTIMER_NORESTART;
}
/* Note callers must have acquired the PUNIT->PMIC bus, before calling this. */
static unsigned int
intel_uncore_forcewake_reset(struct intel_uncore *uncore)
{
unsigned long irqflags;
struct intel_uncore_forcewake_domain *domain;
int retry_count = 100;
enum forcewake_domains fw, active_domains;
iosf_mbi_assert_punit_acquired();
/* Hold uncore.lock across reset to prevent any register access
* with forcewake not set correctly. Wait until all pending
* timers are run before holding.
*/
while (1) {
unsigned int tmp;
active_domains = 0;
for_each_fw_domain(domain, uncore, tmp) {
smp_store_mb(domain->active, false);
if (hrtimer_cancel(&domain->timer) == 0)
continue;
intel_uncore_fw_release_timer(&domain->timer);
}
spin_lock_irqsave(&uncore->lock, irqflags);
for_each_fw_domain(domain, uncore, tmp) {
if (hrtimer_active(&domain->timer))
active_domains |= domain->mask;
}
if (active_domains == 0)
break;
if (--retry_count == 0) {
DRM_ERROR("Timed out waiting for forcewake timers to finish\n");
break;
}
spin_unlock_irqrestore(&uncore->lock, irqflags);
cond_resched();
}
WARN_ON(active_domains);
fw = uncore->fw_domains_active;
if (fw)
uncore->funcs.force_wake_put(uncore, fw);
fw_domains_reset(uncore, uncore->fw_domains);
assert_forcewakes_inactive(uncore);
spin_unlock_irqrestore(&uncore->lock, irqflags);
return fw; /* track the lost user forcewake domains */
}
static bool
fpga_check_for_unclaimed_mmio(struct intel_uncore *uncore)
{
u32 dbg;
dbg = __raw_uncore_read32(uncore, FPGA_DBG);
if (likely(!(dbg & FPGA_DBG_RM_NOCLAIM)))
return false;
__raw_uncore_write32(uncore, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
return true;
}
static bool
vlv_check_for_unclaimed_mmio(struct intel_uncore *uncore)
{
u32 cer;
cer = __raw_uncore_read32(uncore, CLAIM_ER);
if (likely(!(cer & (CLAIM_ER_OVERFLOW | CLAIM_ER_CTR_MASK))))
return false;
__raw_uncore_write32(uncore, CLAIM_ER, CLAIM_ER_CLR);
return true;
}
static bool
gen6_check_for_fifo_debug(struct intel_uncore *uncore)
{
u32 fifodbg;
fifodbg = __raw_uncore_read32(uncore, GTFIFODBG);
if (unlikely(fifodbg)) {
DRM_DEBUG_DRIVER("GTFIFODBG = 0x08%x\n", fifodbg);
__raw_uncore_write32(uncore, GTFIFODBG, fifodbg);
}
return fifodbg;
}
static bool
check_for_unclaimed_mmio(struct intel_uncore *uncore)
{
bool ret = false;
if (intel_uncore_has_fpga_dbg_unclaimed(uncore))
ret |= fpga_check_for_unclaimed_mmio(uncore);
if (intel_uncore_has_dbg_unclaimed(uncore))
ret |= vlv_check_for_unclaimed_mmio(uncore);
if (intel_uncore_has_fifo(uncore))
ret |= gen6_check_for_fifo_debug(uncore);
return ret;
}
static void forcewake_early_sanitize(struct intel_uncore *uncore,
unsigned int restore_forcewake)
{
GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
/* WaDisableShadowRegForCpd:chv */
if (IS_CHERRYVIEW(uncore->i915)) {
__raw_uncore_write32(uncore, GTFIFOCTL,
__raw_uncore_read32(uncore, GTFIFOCTL) |
GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL |
GT_FIFO_CTL_RC6_POLICY_STALL);
}
iosf_mbi_punit_acquire();
intel_uncore_forcewake_reset(uncore);
if (restore_forcewake) {
spin_lock_irq(&uncore->lock);
uncore->funcs.force_wake_get(uncore, restore_forcewake);
if (intel_uncore_has_fifo(uncore))
uncore->fifo_count = fifo_free_entries(uncore);
spin_unlock_irq(&uncore->lock);
}
iosf_mbi_punit_release();
}
void intel_uncore_suspend(struct intel_uncore *uncore)
{
if (!intel_uncore_has_forcewake(uncore))
return;
iosf_mbi_punit_acquire();
iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
&uncore->pmic_bus_access_nb);
uncore->fw_domains_saved = intel_uncore_forcewake_reset(uncore);
iosf_mbi_punit_release();
}
void intel_uncore_resume_early(struct intel_uncore *uncore)
{
unsigned int restore_forcewake;
if (intel_uncore_unclaimed_mmio(uncore))
DRM_DEBUG("unclaimed mmio detected on resume, clearing\n");
if (!intel_uncore_has_forcewake(uncore))
return;
restore_forcewake = fetch_and_zero(&uncore->fw_domains_saved);
forcewake_early_sanitize(uncore, restore_forcewake);
iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
}
void intel_uncore_runtime_resume(struct intel_uncore *uncore)
{
if (!intel_uncore_has_forcewake(uncore))
return;
iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
}
static void __intel_uncore_forcewake_get(struct intel_uncore *uncore,
enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *domain;
unsigned int tmp;
fw_domains &= uncore->fw_domains;
for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
if (domain->wake_count++) {
fw_domains &= ~domain->mask;
domain->active = true;
}
}
if (fw_domains)
uncore->funcs.force_wake_get(uncore, fw_domains);
}
/**
* intel_uncore_forcewake_get - grab forcewake domain references
* @uncore: the intel_uncore structure
* @fw_domains: forcewake domains to get reference on
*
* This function can be used get GT's forcewake domain references.
* Normal register access will handle the forcewake domains automatically.
* However if some sequence requires the GT to not power down a particular
* forcewake domains this function should be called at the beginning of the
* sequence. And subsequently the reference should be dropped by symmetric
* call to intel_unforce_forcewake_put(). Usually caller wants all the domains
* to be kept awake so the @fw_domains would be then FORCEWAKE_ALL.
*/
void intel_uncore_forcewake_get(struct intel_uncore *uncore,
enum forcewake_domains fw_domains)
{
unsigned long irqflags;
if (!uncore->funcs.force_wake_get)
return;
assert_rpm_wakelock_held(uncore->rpm);
spin_lock_irqsave(&uncore->lock, irqflags);
__intel_uncore_forcewake_get(uncore, fw_domains);
spin_unlock_irqrestore(&uncore->lock, irqflags);
}
/**
* intel_uncore_forcewake_user_get - claim forcewake on behalf of userspace
* @uncore: the intel_uncore structure
*
* This function is a wrapper around intel_uncore_forcewake_get() to acquire
* the GT powerwell and in the process disable our debugging for the
* duration of userspace's bypass.
*/
void intel_uncore_forcewake_user_get(struct intel_uncore *uncore)
{
spin_lock_irq(&uncore->lock);
if (!uncore->user_forcewake.count++) {
intel_uncore_forcewake_get__locked(uncore, FORCEWAKE_ALL);
/* Save and disable mmio debugging for the user bypass */
uncore->user_forcewake.saved_mmio_check =
uncore->unclaimed_mmio_check;
uncore->user_forcewake.saved_mmio_debug =
i915_modparams.mmio_debug;
uncore->unclaimed_mmio_check = 0;
i915_modparams.mmio_debug = 0;
}
spin_unlock_irq(&uncore->lock);
}
/**
* intel_uncore_forcewake_user_put - release forcewake on behalf of userspace
* @uncore: the intel_uncore structure
*
* This function complements intel_uncore_forcewake_user_get() and releases
* the GT powerwell taken on behalf of the userspace bypass.
*/
void intel_uncore_forcewake_user_put(struct intel_uncore *uncore)
{
spin_lock_irq(&uncore->lock);
if (!--uncore->user_forcewake.count) {
if (intel_uncore_unclaimed_mmio(uncore))
dev_info(uncore->i915->drm.dev,
"Invalid mmio detected during user access\n");
uncore->unclaimed_mmio_check =
uncore->user_forcewake.saved_mmio_check;
i915_modparams.mmio_debug =
uncore->user_forcewake.saved_mmio_debug;
intel_uncore_forcewake_put__locked(uncore, FORCEWAKE_ALL);
}
spin_unlock_irq(&uncore->lock);
}
/**
* intel_uncore_forcewake_get__locked - grab forcewake domain references
* @uncore: the intel_uncore structure
* @fw_domains: forcewake domains to get reference on
*
* See intel_uncore_forcewake_get(). This variant places the onus
* on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
*/
void intel_uncore_forcewake_get__locked(struct intel_uncore *uncore,
enum forcewake_domains fw_domains)
{
lockdep_assert_held(&uncore->lock);
if (!uncore->funcs.force_wake_get)
return;
__intel_uncore_forcewake_get(uncore, fw_domains);
}
static void __intel_uncore_forcewake_put(struct intel_uncore *uncore,
enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *domain;
unsigned int tmp;
fw_domains &= uncore->fw_domains;
for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
GEM_BUG_ON(!domain->wake_count);
if (--domain->wake_count) {
domain->active = true;
continue;
}
fw_domain_arm_timer(domain);
}
}
/**
* intel_uncore_forcewake_put - release a forcewake domain reference
* @uncore: the intel_uncore structure
* @fw_domains: forcewake domains to put references
*
* This function drops the device-level forcewakes for specified
* domains obtained by intel_uncore_forcewake_get().
*/
void intel_uncore_forcewake_put(struct intel_uncore *uncore,
enum forcewake_domains fw_domains)
{
unsigned long irqflags;
if (!uncore->funcs.force_wake_put)
return;
spin_lock_irqsave(&uncore->lock, irqflags);
__intel_uncore_forcewake_put(uncore, fw_domains);
spin_unlock_irqrestore(&uncore->lock, irqflags);
}
/**
* intel_uncore_forcewake_put__locked - grab forcewake domain references
* @uncore: the intel_uncore structure
* @fw_domains: forcewake domains to get reference on
*
* See intel_uncore_forcewake_put(). This variant places the onus
* on the caller to explicitly handle the dev_priv->uncore.lock spinlock.
*/
void intel_uncore_forcewake_put__locked(struct intel_uncore *uncore,
enum forcewake_domains fw_domains)
{
lockdep_assert_held(&uncore->lock);
if (!uncore->funcs.force_wake_put)
return;
__intel_uncore_forcewake_put(uncore, fw_domains);
}
void assert_forcewakes_inactive(struct intel_uncore *uncore)
{
if (!uncore->funcs.force_wake_get)
return;
WARN(uncore->fw_domains_active,
"Expected all fw_domains to be inactive, but %08x are still on\n",
uncore->fw_domains_active);
}
void assert_forcewakes_active(struct intel_uncore *uncore,
enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *domain;
unsigned int tmp;
if (!IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM))
return;
if (!uncore->funcs.force_wake_get)
return;
spin_lock_irq(&uncore->lock);
assert_rpm_wakelock_held(uncore->rpm);
fw_domains &= uncore->fw_domains;
WARN(fw_domains & ~uncore->fw_domains_active,
"Expected %08x fw_domains to be active, but %08x are off\n",
fw_domains, fw_domains & ~uncore->fw_domains_active);
/*
* Check that the caller has an explicit wakeref and we don't mistake
* it for the auto wakeref.
*/
for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) {
unsigned int actual = READ_ONCE(domain->wake_count);
unsigned int expect = 1;
if (uncore->fw_domains_timer & domain->mask)
expect++; /* pending automatic release */
if (WARN(actual < expect,
"Expected domain %d to be held awake by caller, count=%d\n",
domain->id, actual))
break;
}
spin_unlock_irq(&uncore->lock);
}
/* We give fast paths for the really cool registers */
#define NEEDS_FORCE_WAKE(reg) ((reg) < 0x40000)
#define GEN11_NEEDS_FORCE_WAKE(reg) \
((reg) < 0x40000 || ((reg) >= 0x1c0000 && (reg) < 0x1dc000))
#define __gen6_reg_read_fw_domains(uncore, offset) \
({ \
enum forcewake_domains __fwd; \
if (NEEDS_FORCE_WAKE(offset)) \
__fwd = FORCEWAKE_RENDER; \
else \
__fwd = 0; \
__fwd; \
})
static int fw_range_cmp(u32 offset, const struct intel_forcewake_range *entry)
{
if (offset < entry->start)
return -1;
else if (offset > entry->end)
return 1;
else
return 0;
}
/* Copied and "macroized" from lib/bsearch.c */
#define BSEARCH(key, base, num, cmp) ({ \
unsigned int start__ = 0, end__ = (num); \
typeof(base) result__ = NULL; \
while (start__ < end__) { \
unsigned int mid__ = start__ + (end__ - start__) / 2; \
int ret__ = (cmp)((key), (base) + mid__); \
if (ret__ < 0) { \
end__ = mid__; \
} else if (ret__ > 0) { \
start__ = mid__ + 1; \
} else { \
result__ = (base) + mid__; \
break; \
} \
} \
result__; \
})
static enum forcewake_domains
find_fw_domain(struct intel_uncore *uncore, u32 offset)
{
const struct intel_forcewake_range *entry;
entry = BSEARCH(offset,
uncore->fw_domains_table,
uncore->fw_domains_table_entries,
fw_range_cmp);
if (!entry)
return 0;
/*
* The list of FW domains depends on the SKU in gen11+ so we
* can't determine it statically. We use FORCEWAKE_ALL and
* translate it here to the list of available domains.
*/
if (entry->domains == FORCEWAKE_ALL)
return uncore->fw_domains;
WARN(entry->domains & ~uncore->fw_domains,
"Uninitialized forcewake domain(s) 0x%x accessed at 0x%x\n",
entry->domains & ~uncore->fw_domains, offset);
return entry->domains;
}
#define GEN_FW_RANGE(s, e, d) \
{ .start = (s), .end = (e), .domains = (d) }
#define HAS_FWTABLE(dev_priv) \
(INTEL_GEN(dev_priv) >= 9 || \
IS_CHERRYVIEW(dev_priv) || \
IS_VALLEYVIEW(dev_priv))
/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
static const struct intel_forcewake_range __vlv_fw_ranges[] = {
GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x5000, 0x7fff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0xb000, 0x11fff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x22000, 0x23fff, FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x2e000, 0x2ffff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
};
#define __fwtable_reg_read_fw_domains(uncore, offset) \
({ \
enum forcewake_domains __fwd = 0; \
if (NEEDS_FORCE_WAKE((offset))) \
__fwd = find_fw_domain(uncore, offset); \
__fwd; \
})
#define __gen11_fwtable_reg_read_fw_domains(uncore, offset) \
({ \
enum forcewake_domains __fwd = 0; \
if (GEN11_NEEDS_FORCE_WAKE((offset))) \
__fwd = find_fw_domain(uncore, offset); \
__fwd; \
})
/* *Must* be sorted by offset! See intel_shadow_table_check(). */
static const i915_reg_t gen8_shadowed_regs[] = {
RING_TAIL(RENDER_RING_BASE), /* 0x2000 (base) */
GEN6_RPNSWREQ, /* 0xA008 */
GEN6_RC_VIDEO_FREQ, /* 0xA00C */
RING_TAIL(GEN6_BSD_RING_BASE), /* 0x12000 (base) */
RING_TAIL(VEBOX_RING_BASE), /* 0x1a000 (base) */
RING_TAIL(BLT_RING_BASE), /* 0x22000 (base) */
/* TODO: Other registers are not yet used */
};
static const i915_reg_t gen11_shadowed_regs[] = {
RING_TAIL(RENDER_RING_BASE), /* 0x2000 (base) */
GEN6_RPNSWREQ, /* 0xA008 */
GEN6_RC_VIDEO_FREQ, /* 0xA00C */
RING_TAIL(BLT_RING_BASE), /* 0x22000 (base) */
RING_TAIL(GEN11_BSD_RING_BASE), /* 0x1C0000 (base) */
RING_TAIL(GEN11_BSD2_RING_BASE), /* 0x1C4000 (base) */
RING_TAIL(GEN11_VEBOX_RING_BASE), /* 0x1C8000 (base) */
RING_TAIL(GEN11_BSD3_RING_BASE), /* 0x1D0000 (base) */
RING_TAIL(GEN11_BSD4_RING_BASE), /* 0x1D4000 (base) */
RING_TAIL(GEN11_VEBOX2_RING_BASE), /* 0x1D8000 (base) */
/* TODO: Other registers are not yet used */
};
static int mmio_reg_cmp(u32 key, const i915_reg_t *reg)
{
u32 offset = i915_mmio_reg_offset(*reg);
if (key < offset)
return -1;
else if (key > offset)
return 1;
else
return 0;
}
#define __is_genX_shadowed(x) \
static bool is_gen##x##_shadowed(u32 offset) \
{ \
const i915_reg_t *regs = gen##x##_shadowed_regs; \
return BSEARCH(offset, regs, ARRAY_SIZE(gen##x##_shadowed_regs), \
mmio_reg_cmp); \
}
__is_genX_shadowed(8)
__is_genX_shadowed(11)
static enum forcewake_domains
gen6_reg_write_fw_domains(struct intel_uncore *uncore, i915_reg_t reg)
{
return FORCEWAKE_RENDER;
}
#define __gen8_reg_write_fw_domains(uncore, offset) \
({ \
enum forcewake_domains __fwd; \
if (NEEDS_FORCE_WAKE(offset) && !is_gen8_shadowed(offset)) \
__fwd = FORCEWAKE_RENDER; \
else \
__fwd = 0; \
__fwd; \
})
/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
static const struct intel_forcewake_range __chv_fw_ranges[] = {
GEN_FW_RANGE(0x2000, 0x3fff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x4000, 0x4fff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x8000, 0x82ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x8500, 0x85ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x8800, 0x88ff, FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x9000, 0xafff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
GEN_FW_RANGE(0xe000, 0xe7ff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0xf000, 0xffff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x1a000, 0x1bfff, FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x1e800, 0x1e9ff, FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x30000, 0x37fff, FORCEWAKE_MEDIA),
};
#define __fwtable_reg_write_fw_domains(uncore, offset) \
({ \
enum forcewake_domains __fwd = 0; \
if (NEEDS_FORCE_WAKE((offset)) && !is_gen8_shadowed(offset)) \
__fwd = find_fw_domain(uncore, offset); \
__fwd; \
})
#define __gen11_fwtable_reg_write_fw_domains(uncore, offset) \
({ \
enum forcewake_domains __fwd = 0; \
if (GEN11_NEEDS_FORCE_WAKE((offset)) && !is_gen11_shadowed(offset)) \
__fwd = find_fw_domain(uncore, offset); \
__fwd; \
})
/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
static const struct intel_forcewake_range __gen9_fw_ranges[] = {
GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x8000, 0x812f, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x8130, 0x813f, FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x8500, 0x87ff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x8800, 0x89ff, FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x8a00, 0x8bff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_RENDER | FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
GEN_FW_RANGE(0xb480, 0xcfff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0xd000, 0xd7ff, FORCEWAKE_MEDIA),
GEN_FW_RANGE(0xd800, 0xdfff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0xe900, 0x11fff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x12000, 0x13fff, FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x14000, 0x19fff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x1a000, 0x1e9ff, FORCEWAKE_MEDIA),
GEN_FW_RANGE(0x1ea00, 0x243ff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x24800, 0x2ffff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_MEDIA),
};
/* *Must* be sorted by offset ranges! See intel_fw_table_check(). */
static const struct intel_forcewake_range __gen11_fw_ranges[] = {
GEN_FW_RANGE(0x0, 0xaff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0xb00, 0x1fff, 0), /* uncore range */
GEN_FW_RANGE(0x2000, 0x26ff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x2700, 0x2fff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x3000, 0x3fff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x4000, 0x51ff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x5200, 0x7fff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x8000, 0x813f, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x8140, 0x815f, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x8160, 0x82ff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x8300, 0x84ff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x8500, 0x8bff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x8c00, 0x8cff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x8d00, 0x93ff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x9400, 0x97ff, FORCEWAKE_ALL),
GEN_FW_RANGE(0x9800, 0xafff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0xb000, 0xb47f, FORCEWAKE_RENDER),
GEN_FW_RANGE(0xb480, 0xdfff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0xe000, 0xe8ff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0xe900, 0x243ff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x24400, 0x247ff, FORCEWAKE_RENDER),
GEN_FW_RANGE(0x24800, 0x3ffff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x40000, 0x1bffff, 0),
GEN_FW_RANGE(0x1c0000, 0x1c3fff, FORCEWAKE_MEDIA_VDBOX0),
GEN_FW_RANGE(0x1c4000, 0x1c7fff, FORCEWAKE_MEDIA_VDBOX1),
GEN_FW_RANGE(0x1c8000, 0x1cbfff, FORCEWAKE_MEDIA_VEBOX0),
GEN_FW_RANGE(0x1cc000, 0x1cffff, FORCEWAKE_BLITTER),
GEN_FW_RANGE(0x1d0000, 0x1d3fff, FORCEWAKE_MEDIA_VDBOX2),
GEN_FW_RANGE(0x1d4000, 0x1d7fff, FORCEWAKE_MEDIA_VDBOX3),
GEN_FW_RANGE(0x1d8000, 0x1dbfff, FORCEWAKE_MEDIA_VEBOX1)
};
static void
ilk_dummy_write(struct intel_uncore *uncore)
{
/* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up
* the chip from rc6 before touching it for real. MI_MODE is masked,
* hence harmless to write 0 into. */
__raw_uncore_write32(uncore, MI_MODE, 0);
}
static void
__unclaimed_reg_debug(struct intel_uncore *uncore,
const i915_reg_t reg,
const bool read,
const bool before)
{
if (WARN(check_for_unclaimed_mmio(uncore) && !before,
"Unclaimed %s register 0x%x\n",
read ? "read from" : "write to",
i915_mmio_reg_offset(reg)))
/* Only report the first N failures */
i915_modparams.mmio_debug--;
}
static inline void
unclaimed_reg_debug(struct intel_uncore *uncore,
const i915_reg_t reg,
const bool read,
const bool before)
{
if (likely(!i915_modparams.mmio_debug))
return;
__unclaimed_reg_debug(uncore, reg, read, before);
}
#define GEN2_READ_HEADER(x) \
u##x val = 0; \
assert_rpm_wakelock_held(uncore->rpm);
#define GEN2_READ_FOOTER \
trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
return val
#define __gen2_read(x) \
static u##x \
gen2_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
GEN2_READ_HEADER(x); \
val = __raw_uncore_read##x(uncore, reg); \
GEN2_READ_FOOTER; \
}
#define __gen5_read(x) \
static u##x \
gen5_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
GEN2_READ_HEADER(x); \
ilk_dummy_write(uncore); \
val = __raw_uncore_read##x(uncore, reg); \
GEN2_READ_FOOTER; \
}
__gen5_read(8)
__gen5_read(16)
__gen5_read(32)
__gen5_read(64)
__gen2_read(8)
__gen2_read(16)
__gen2_read(32)
__gen2_read(64)
#undef __gen5_read
#undef __gen2_read
#undef GEN2_READ_FOOTER
#undef GEN2_READ_HEADER
#define GEN6_READ_HEADER(x) \
u32 offset = i915_mmio_reg_offset(reg); \
unsigned long irqflags; \
u##x val = 0; \
assert_rpm_wakelock_held(uncore->rpm); \
spin_lock_irqsave(&uncore->lock, irqflags); \
unclaimed_reg_debug(uncore, reg, true, true)
#define GEN6_READ_FOOTER \
unclaimed_reg_debug(uncore, reg, true, false); \
spin_unlock_irqrestore(&uncore->lock, irqflags); \
trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
return val
static noinline void ___force_wake_auto(struct intel_uncore *uncore,
enum forcewake_domains fw_domains)
{
struct intel_uncore_forcewake_domain *domain;
unsigned int tmp;
GEM_BUG_ON(fw_domains & ~uncore->fw_domains);
for_each_fw_domain_masked(domain, fw_domains, uncore, tmp)
fw_domain_arm_timer(domain);
uncore->funcs.force_wake_get(uncore, fw_domains);
}
static inline void __force_wake_auto(struct intel_uncore *uncore,
enum forcewake_domains fw_domains)
{
GEM_BUG_ON(!fw_domains);
/* Turn on all requested but inactive supported forcewake domains. */
fw_domains &= uncore->fw_domains;
fw_domains &= ~uncore->fw_domains_active;
if (fw_domains)
___force_wake_auto(uncore, fw_domains);
}
#define __gen_read(func, x) \
static u##x \
func##_read##x(struct intel_uncore *uncore, i915_reg_t reg, bool trace) { \
enum forcewake_domains fw_engine; \
GEN6_READ_HEADER(x); \
fw_engine = __##func##_reg_read_fw_domains(uncore, offset); \
if (fw_engine) \
__force_wake_auto(uncore, fw_engine); \
val = __raw_uncore_read##x(uncore, reg); \
GEN6_READ_FOOTER; \
}
#define __gen_reg_read_funcs(func) \
static enum forcewake_domains \
func##_reg_read_fw_domains(struct intel_uncore *uncore, i915_reg_t reg) { \
return __##func##_reg_read_fw_domains(uncore, i915_mmio_reg_offset(reg)); \
} \
\
__gen_read(func, 8) \
__gen_read(func, 16) \
__gen_read(func, 32) \
__gen_read(func, 64)
__gen_reg_read_funcs(gen11_fwtable);
__gen_reg_read_funcs(fwtable);
__gen_reg_read_funcs(gen6);
#undef __gen_reg_read_funcs
#undef GEN6_READ_FOOTER
#undef GEN6_READ_HEADER
#define GEN2_WRITE_HEADER \
trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
assert_rpm_wakelock_held(uncore->rpm); \
#define GEN2_WRITE_FOOTER
#define __gen2_write(x) \
static void \
gen2_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
GEN2_WRITE_HEADER; \
__raw_uncore_write##x(uncore, reg, val); \
GEN2_WRITE_FOOTER; \
}
#define __gen5_write(x) \
static void \
gen5_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
GEN2_WRITE_HEADER; \
ilk_dummy_write(uncore); \
__raw_uncore_write##x(uncore, reg, val); \
GEN2_WRITE_FOOTER; \
}
__gen5_write(8)
__gen5_write(16)
__gen5_write(32)
__gen2_write(8)
__gen2_write(16)
__gen2_write(32)
#undef __gen5_write
#undef __gen2_write
#undef GEN2_WRITE_FOOTER
#undef GEN2_WRITE_HEADER
#define GEN6_WRITE_HEADER \
u32 offset = i915_mmio_reg_offset(reg); \
unsigned long irqflags; \
trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
assert_rpm_wakelock_held(uncore->rpm); \
spin_lock_irqsave(&uncore->lock, irqflags); \
unclaimed_reg_debug(uncore, reg, false, true)
#define GEN6_WRITE_FOOTER \
unclaimed_reg_debug(uncore, reg, false, false); \
spin_unlock_irqrestore(&uncore->lock, irqflags)
#define __gen6_write(x) \
static void \
gen6_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
GEN6_WRITE_HEADER; \
if (NEEDS_FORCE_WAKE(offset)) \
__gen6_gt_wait_for_fifo(uncore); \
__raw_uncore_write##x(uncore, reg, val); \
GEN6_WRITE_FOOTER; \
}
__gen6_write(8)
__gen6_write(16)
__gen6_write(32)
#define __gen_write(func, x) \
static void \
func##_write##x(struct intel_uncore *uncore, i915_reg_t reg, u##x val, bool trace) { \
enum forcewake_domains fw_engine; \
GEN6_WRITE_HEADER; \
fw_engine = __##func##_reg_write_fw_domains(uncore, offset); \
if (fw_engine) \
__force_wake_auto(uncore, fw_engine); \
__raw_uncore_write##x(uncore, reg, val); \
GEN6_WRITE_FOOTER; \
}
#define __gen_reg_write_funcs(func) \
static enum forcewake_domains \
func##_reg_write_fw_domains(struct intel_uncore *uncore, i915_reg_t reg) { \
return __##func##_reg_write_fw_domains(uncore, i915_mmio_reg_offset(reg)); \
} \
\
__gen_write(func, 8) \
__gen_write(func, 16) \
__gen_write(func, 32)
__gen_reg_write_funcs(gen11_fwtable);
__gen_reg_write_funcs(fwtable);
__gen_reg_write_funcs(gen8);
#undef __gen_reg_write_funcs
#undef GEN6_WRITE_FOOTER
#undef GEN6_WRITE_HEADER
#define ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, x) \
do { \
(uncore)->funcs.mmio_writeb = x##_write8; \
(uncore)->funcs.mmio_writew = x##_write16; \
(uncore)->funcs.mmio_writel = x##_write32; \
} while (0)
#define ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, x) \
do { \
(uncore)->funcs.mmio_readb = x##_read8; \
(uncore)->funcs.mmio_readw = x##_read16; \
(uncore)->funcs.mmio_readl = x##_read32; \
(uncore)->funcs.mmio_readq = x##_read64; \
} while (0)
#define ASSIGN_WRITE_MMIO_VFUNCS(uncore, x) \
do { \
ASSIGN_RAW_WRITE_MMIO_VFUNCS((uncore), x); \
(uncore)->funcs.write_fw_domains = x##_reg_write_fw_domains; \
} while (0)
#define ASSIGN_READ_MMIO_VFUNCS(uncore, x) \
do { \
ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, x); \
(uncore)->funcs.read_fw_domains = x##_reg_read_fw_domains; \
} while (0)
static int __fw_domain_init(struct intel_uncore *uncore,
enum forcewake_domain_id domain_id,
i915_reg_t reg_set,
i915_reg_t reg_ack)
{
struct intel_uncore_forcewake_domain *d;
GEM_BUG_ON(domain_id >= FW_DOMAIN_ID_COUNT);
GEM_BUG_ON(uncore->fw_domain[domain_id]);
if (i915_inject_probe_failure())
return -ENOMEM;
d = kzalloc(sizeof(*d), GFP_KERNEL);
if (!d)
return -ENOMEM;
WARN_ON(!i915_mmio_reg_valid(reg_set));
WARN_ON(!i915_mmio_reg_valid(reg_ack));
d->uncore = uncore;
d->wake_count = 0;
d->reg_set = uncore->regs + i915_mmio_reg_offset(reg_set);
d->reg_ack = uncore->regs + i915_mmio_reg_offset(reg_ack);
d->id = domain_id;
BUILD_BUG_ON(FORCEWAKE_RENDER != (1 << FW_DOMAIN_ID_RENDER));
BUILD_BUG_ON(FORCEWAKE_BLITTER != (1 << FW_DOMAIN_ID_BLITTER));
BUILD_BUG_ON(FORCEWAKE_MEDIA != (1 << FW_DOMAIN_ID_MEDIA));
BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX0));
BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX1));
BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX2 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX2));
BUILD_BUG_ON(FORCEWAKE_MEDIA_VDBOX3 != (1 << FW_DOMAIN_ID_MEDIA_VDBOX3));
BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX0 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX0));
BUILD_BUG_ON(FORCEWAKE_MEDIA_VEBOX1 != (1 << FW_DOMAIN_ID_MEDIA_VEBOX1));
d->mask = BIT(domain_id);
hrtimer_init(&d->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
d->timer.function = intel_uncore_fw_release_timer;
uncore->fw_domains |= BIT(domain_id);
fw_domain_reset(d);
uncore->fw_domain[domain_id] = d;
return 0;
}
static void fw_domain_fini(struct intel_uncore *uncore,
enum forcewake_domain_id domain_id)
{
struct intel_uncore_forcewake_domain *d;
GEM_BUG_ON(domain_id >= FW_DOMAIN_ID_COUNT);
d = fetch_and_zero(&uncore->fw_domain[domain_id]);
if (!d)
return;
uncore->fw_domains &= ~BIT(domain_id);
WARN_ON(d->wake_count);
WARN_ON(hrtimer_cancel(&d->timer));
kfree(d);
}
static void intel_uncore_fw_domains_fini(struct intel_uncore *uncore)
{
struct intel_uncore_forcewake_domain *d;
int tmp;
for_each_fw_domain(d, uncore, tmp)
fw_domain_fini(uncore, d->id);
}
static int intel_uncore_fw_domains_init(struct intel_uncore *uncore)
{
struct drm_i915_private *i915 = uncore->i915;
int ret = 0;
GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
#define fw_domain_init(uncore__, id__, set__, ack__) \
(ret ?: (ret = __fw_domain_init((uncore__), (id__), (set__), (ack__))))
if (INTEL_GEN(i915) >= 11) {
int i;
uncore->funcs.force_wake_get = fw_domains_get_with_fallback;
uncore->funcs.force_wake_put = fw_domains_put;
fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
FORCEWAKE_RENDER_GEN9,
FORCEWAKE_ACK_RENDER_GEN9);
fw_domain_init(uncore, FW_DOMAIN_ID_BLITTER,
FORCEWAKE_BLITTER_GEN9,
FORCEWAKE_ACK_BLITTER_GEN9);
for (i = 0; i < I915_MAX_VCS; i++) {
if (!HAS_ENGINE(i915, _VCS(i)))
continue;
fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA_VDBOX0 + i,
FORCEWAKE_MEDIA_VDBOX_GEN11(i),
FORCEWAKE_ACK_MEDIA_VDBOX_GEN11(i));
}
for (i = 0; i < I915_MAX_VECS; i++) {
if (!HAS_ENGINE(i915, _VECS(i)))
continue;
fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA_VEBOX0 + i,
FORCEWAKE_MEDIA_VEBOX_GEN11(i),
FORCEWAKE_ACK_MEDIA_VEBOX_GEN11(i));
}
} else if (IS_GEN_RANGE(i915, 9, 10)) {
uncore->funcs.force_wake_get = fw_domains_get_with_fallback;
uncore->funcs.force_wake_put = fw_domains_put;
fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
FORCEWAKE_RENDER_GEN9,
FORCEWAKE_ACK_RENDER_GEN9);
fw_domain_init(uncore, FW_DOMAIN_ID_BLITTER,
FORCEWAKE_BLITTER_GEN9,
FORCEWAKE_ACK_BLITTER_GEN9);
fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA,
FORCEWAKE_MEDIA_GEN9, FORCEWAKE_ACK_MEDIA_GEN9);
} else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
uncore->funcs.force_wake_get = fw_domains_get;
uncore->funcs.force_wake_put = fw_domains_put;
fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
FORCEWAKE_VLV, FORCEWAKE_ACK_VLV);
fw_domain_init(uncore, FW_DOMAIN_ID_MEDIA,
FORCEWAKE_MEDIA_VLV, FORCEWAKE_ACK_MEDIA_VLV);
} else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
uncore->funcs.force_wake_get =
fw_domains_get_with_thread_status;
uncore->funcs.force_wake_put = fw_domains_put;
fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
FORCEWAKE_MT, FORCEWAKE_ACK_HSW);
} else if (IS_IVYBRIDGE(i915)) {
u32 ecobus;
/* IVB configs may use multi-threaded forcewake */
/* A small trick here - if the bios hasn't configured
* MT forcewake, and if the device is in RC6, then
* force_wake_mt_get will not wake the device and the
* ECOBUS read will return zero. Which will be
* (correctly) interpreted by the test below as MT
* forcewake being disabled.
*/
uncore->funcs.force_wake_get =
fw_domains_get_with_thread_status;
uncore->funcs.force_wake_put = fw_domains_put;
/* We need to init first for ECOBUS access and then
* determine later if we want to reinit, in case of MT access is
* not working. In this stage we don't know which flavour this
* ivb is, so it is better to reset also the gen6 fw registers
* before the ecobus check.
*/
__raw_uncore_write32(uncore, FORCEWAKE, 0);
__raw_posting_read(uncore, ECOBUS);
ret = __fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
FORCEWAKE_MT, FORCEWAKE_MT_ACK);
if (ret)
goto out;
spin_lock_irq(&uncore->lock);
fw_domains_get_with_thread_status(uncore, FORCEWAKE_RENDER);
ecobus = __raw_uncore_read32(uncore, ECOBUS);
fw_domains_put(uncore, FORCEWAKE_RENDER);
spin_unlock_irq(&uncore->lock);
if (!(ecobus & FORCEWAKE_MT_ENABLE)) {
DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n");
DRM_INFO("when using vblank-synced partial screen updates.\n");
fw_domain_fini(uncore, FW_DOMAIN_ID_RENDER);
fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
FORCEWAKE, FORCEWAKE_ACK);
}
} else if (IS_GEN(i915, 6)) {
uncore->funcs.force_wake_get =
fw_domains_get_with_thread_status;
uncore->funcs.force_wake_put = fw_domains_put;
fw_domain_init(uncore, FW_DOMAIN_ID_RENDER,
FORCEWAKE, FORCEWAKE_ACK);
}
#undef fw_domain_init
/* All future platforms are expected to require complex power gating */
WARN_ON(!ret && uncore->fw_domains == 0);
out:
if (ret)
intel_uncore_fw_domains_fini(uncore);
return ret;
}
#define ASSIGN_FW_DOMAINS_TABLE(uncore, d) \
{ \
(uncore)->fw_domains_table = \
(struct intel_forcewake_range *)(d); \
(uncore)->fw_domains_table_entries = ARRAY_SIZE((d)); \
}
static int i915_pmic_bus_access_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct intel_uncore *uncore = container_of(nb,
struct intel_uncore, pmic_bus_access_nb);
switch (action) {
case MBI_PMIC_BUS_ACCESS_BEGIN:
/*
* forcewake all now to make sure that we don't need to do a
* forcewake later which on systems where this notifier gets
* called requires the punit to access to the shared pmic i2c
* bus, which will be busy after this notification, leading to:
* "render: timed out waiting for forcewake ack request."
* errors.
*
* The notifier is unregistered during intel_runtime_suspend(),
* so it's ok to access the HW here without holding a RPM
* wake reference -> disable wakeref asserts for the time of
* the access.
*/
disable_rpm_wakeref_asserts(uncore->rpm);
intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL);
enable_rpm_wakeref_asserts(uncore->rpm);
break;
case MBI_PMIC_BUS_ACCESS_END:
intel_uncore_forcewake_put(uncore, FORCEWAKE_ALL);
break;
}
return NOTIFY_OK;
}
static int uncore_mmio_setup(struct intel_uncore *uncore)
{
struct drm_i915_private *i915 = uncore->i915;
struct pci_dev *pdev = i915->drm.pdev;
int mmio_bar;
int mmio_size;
mmio_bar = IS_GEN(i915, 2) ? 1 : 0;
/*
* Before gen4, the registers and the GTT are behind different BARs.
* However, from gen4 onwards, the registers and the GTT are shared
* in the same BAR, so we want to restrict this ioremap from
* clobbering the GTT which we want ioremap_wc instead. Fortunately,
* the register BAR remains the same size for all the earlier
* generations up to Ironlake.
*/
if (INTEL_GEN(i915) < 5)
mmio_size = 512 * 1024;
else
mmio_size = 2 * 1024 * 1024;
uncore->regs = pci_iomap(pdev, mmio_bar, mmio_size);
if (uncore->regs == NULL) {
DRM_ERROR("failed to map registers\n");
return -EIO;
}
return 0;
}
static void uncore_mmio_cleanup(struct intel_uncore *uncore)
{
struct pci_dev *pdev = uncore->i915->drm.pdev;
pci_iounmap(pdev, uncore->regs);
}
void intel_uncore_init_early(struct intel_uncore *uncore,
struct drm_i915_private *i915)
{
spin_lock_init(&uncore->lock);
uncore->i915 = i915;
uncore->rpm = &i915->runtime_pm;
}
static void uncore_raw_init(struct intel_uncore *uncore)
{
GEM_BUG_ON(intel_uncore_has_forcewake(uncore));
if (IS_GEN(uncore->i915, 5)) {
ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, gen5);
ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, gen5);
} else {
ASSIGN_RAW_WRITE_MMIO_VFUNCS(uncore, gen2);
ASSIGN_RAW_READ_MMIO_VFUNCS(uncore, gen2);
}
}
static int uncore_forcewake_init(struct intel_uncore *uncore)
{
struct drm_i915_private *i915 = uncore->i915;
int ret;
GEM_BUG_ON(!intel_uncore_has_forcewake(uncore));
ret = intel_uncore_fw_domains_init(uncore);
if (ret)
return ret;
forcewake_early_sanitize(uncore, 0);
if (IS_GEN_RANGE(i915, 6, 7)) {
ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen6);
if (IS_VALLEYVIEW(i915)) {
ASSIGN_FW_DOMAINS_TABLE(uncore, __vlv_fw_ranges);
ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
} else {
ASSIGN_READ_MMIO_VFUNCS(uncore, gen6);
}
} else if (IS_GEN(i915, 8)) {
if (IS_CHERRYVIEW(i915)) {
ASSIGN_FW_DOMAINS_TABLE(uncore, __chv_fw_ranges);
ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
} else {
ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen8);
ASSIGN_READ_MMIO_VFUNCS(uncore, gen6);
}
} else if (IS_GEN_RANGE(i915, 9, 10)) {
ASSIGN_FW_DOMAINS_TABLE(uncore, __gen9_fw_ranges);
ASSIGN_WRITE_MMIO_VFUNCS(uncore, fwtable);
ASSIGN_READ_MMIO_VFUNCS(uncore, fwtable);
} else {
ASSIGN_FW_DOMAINS_TABLE(uncore, __gen11_fw_ranges);
ASSIGN_WRITE_MMIO_VFUNCS(uncore, gen11_fwtable);
ASSIGN_READ_MMIO_VFUNCS(uncore, gen11_fwtable);
}
uncore->pmic_bus_access_nb.notifier_call = i915_pmic_bus_access_notifier;
iosf_mbi_register_pmic_bus_access_notifier(&uncore->pmic_bus_access_nb);
return 0;
}
int intel_uncore_init_mmio(struct intel_uncore *uncore)
{
struct drm_i915_private *i915 = uncore->i915;
int ret;
ret = uncore_mmio_setup(uncore);
if (ret)
return ret;
if (INTEL_GEN(i915) > 5 && !intel_vgpu_active(i915))
uncore->flags |= UNCORE_HAS_FORCEWAKE;
uncore->unclaimed_mmio_check = 1;
if (!intel_uncore_has_forcewake(uncore)) {
uncore_raw_init(uncore);
} else {
ret = uncore_forcewake_init(uncore);
if (ret)
goto out_mmio_cleanup;
}
/* make sure fw funcs are set if and only if we have fw*/
GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.force_wake_get);
GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.force_wake_put);
GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.read_fw_domains);
GEM_BUG_ON(intel_uncore_has_forcewake(uncore) != !!uncore->funcs.write_fw_domains);
if (HAS_FPGA_DBG_UNCLAIMED(i915))
uncore->flags |= UNCORE_HAS_FPGA_DBG_UNCLAIMED;
if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
uncore->flags |= UNCORE_HAS_DBG_UNCLAIMED;
if (IS_GEN_RANGE(i915, 6, 7))
uncore->flags |= UNCORE_HAS_FIFO;
/* clear out unclaimed reg detection bit */
if (check_for_unclaimed_mmio(uncore))
DRM_DEBUG("unclaimed mmio detected on uncore init, clearing\n");
return 0;
out_mmio_cleanup:
uncore_mmio_cleanup(uncore);
return ret;
}
/*
* We might have detected that some engines are fused off after we initialized
* the forcewake domains. Prune them, to make sure they only reference existing
* engines.
*/
void intel_uncore_prune_mmio_domains(struct intel_uncore *uncore)
{
struct drm_i915_private *i915 = uncore->i915;
enum forcewake_domains fw_domains = uncore->fw_domains;
enum forcewake_domain_id domain_id;
int i;
if (!intel_uncore_has_forcewake(uncore) || INTEL_GEN(i915) < 11)
return;
for (i = 0; i < I915_MAX_VCS; i++) {
domain_id = FW_DOMAIN_ID_MEDIA_VDBOX0 + i;
if (HAS_ENGINE(i915, _VCS(i)))
continue;
if (fw_domains & BIT(domain_id))
fw_domain_fini(uncore, domain_id);
}
for (i = 0; i < I915_MAX_VECS; i++) {
domain_id = FW_DOMAIN_ID_MEDIA_VEBOX0 + i;
if (HAS_ENGINE(i915, _VECS(i)))
continue;
if (fw_domains & BIT(domain_id))
fw_domain_fini(uncore, domain_id);
}
}
void intel_uncore_fini_mmio(struct intel_uncore *uncore)
{
if (intel_uncore_has_forcewake(uncore)) {
iosf_mbi_punit_acquire();
iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
&uncore->pmic_bus_access_nb);
intel_uncore_forcewake_reset(uncore);
intel_uncore_fw_domains_fini(uncore);
iosf_mbi_punit_release();
}
uncore_mmio_cleanup(uncore);
}
static const struct reg_whitelist {
i915_reg_t offset_ldw;
i915_reg_t offset_udw;
u16 gen_mask;
u8 size;
} reg_read_whitelist[] = { {
.offset_ldw = RING_TIMESTAMP(RENDER_RING_BASE),
.offset_udw = RING_TIMESTAMP_UDW(RENDER_RING_BASE),
.gen_mask = INTEL_GEN_MASK(4, 11),
.size = 8
} };
int i915_reg_read_ioctl(struct drm_device *dev,
void *data, struct drm_file *file)
{
struct drm_i915_private *i915 = to_i915(dev);
struct intel_uncore *uncore = &i915->uncore;
struct drm_i915_reg_read *reg = data;
struct reg_whitelist const *entry;
intel_wakeref_t wakeref;
unsigned int flags;
int remain;
int ret = 0;
entry = reg_read_whitelist;
remain = ARRAY_SIZE(reg_read_whitelist);
while (remain) {
u32 entry_offset = i915_mmio_reg_offset(entry->offset_ldw);
GEM_BUG_ON(!is_power_of_2(entry->size));
GEM_BUG_ON(entry->size > 8);
GEM_BUG_ON(entry_offset & (entry->size - 1));
if (INTEL_INFO(i915)->gen_mask & entry->gen_mask &&
entry_offset == (reg->offset & -entry->size))
break;
entry++;
remain--;
}
if (!remain)
return -EINVAL;
flags = reg->offset & (entry->size - 1);
with_intel_runtime_pm(&i915->runtime_pm, wakeref) {
if (entry->size == 8 && flags == I915_REG_READ_8B_WA)
reg->val = intel_uncore_read64_2x32(uncore,
entry->offset_ldw,
entry->offset_udw);
else if (entry->size == 8 && flags == 0)
reg->val = intel_uncore_read64(uncore,
entry->offset_ldw);
else if (entry->size == 4 && flags == 0)
reg->val = intel_uncore_read(uncore, entry->offset_ldw);
else if (entry->size == 2 && flags == 0)
reg->val = intel_uncore_read16(uncore,
entry->offset_ldw);
else if (entry->size == 1 && flags == 0)
reg->val = intel_uncore_read8(uncore,
entry->offset_ldw);
else
ret = -EINVAL;
}
return ret;
}
/**
* __intel_wait_for_register_fw - wait until register matches expected state
* @uncore: the struct intel_uncore
* @reg: the register to read
* @mask: mask to apply to register value
* @value: expected value
* @fast_timeout_us: fast timeout in microsecond for atomic/tight wait
* @slow_timeout_ms: slow timeout in millisecond
* @out_value: optional placeholder to hold registry value
*
* This routine waits until the target register @reg contains the expected
* @value after applying the @mask, i.e. it waits until ::
*
* (I915_READ_FW(reg) & mask) == value
*
* Otherwise, the wait will timeout after @slow_timeout_ms milliseconds.
* For atomic context @slow_timeout_ms must be zero and @fast_timeout_us
* must be not larger than 20,0000 microseconds.
*
* Note that this routine assumes the caller holds forcewake asserted, it is
* not suitable for very long waits. See intel_wait_for_register() if you
* wish to wait without holding forcewake for the duration (i.e. you expect
* the wait to be slow).
*
* Returns 0 if the register matches the desired condition, or -ETIMEOUT.
*/
int __intel_wait_for_register_fw(struct intel_uncore *uncore,
i915_reg_t reg,
u32 mask,
u32 value,
unsigned int fast_timeout_us,
unsigned int slow_timeout_ms,
u32 *out_value)
{
u32 uninitialized_var(reg_value);
#define done (((reg_value = intel_uncore_read_fw(uncore, reg)) & mask) == value)
int ret;
/* Catch any overuse of this function */
might_sleep_if(slow_timeout_ms);
GEM_BUG_ON(fast_timeout_us > 20000);
ret = -ETIMEDOUT;
if (fast_timeout_us && fast_timeout_us <= 20000)
ret = _wait_for_atomic(done, fast_timeout_us, 0);
if (ret && slow_timeout_ms)
ret = wait_for(done, slow_timeout_ms);
if (out_value)
*out_value = reg_value;
return ret;
#undef done
}
/**
* __intel_wait_for_register - wait until register matches expected state
* @uncore: the struct intel_uncore
* @reg: the register to read
* @mask: mask to apply to register value
* @value: expected value
* @fast_timeout_us: fast timeout in microsecond for atomic/tight wait
* @slow_timeout_ms: slow timeout in millisecond
* @out_value: optional placeholder to hold registry value
*
* This routine waits until the target register @reg contains the expected
* @value after applying the @mask, i.e. it waits until ::
*
* (I915_READ(reg) & mask) == value
*
* Otherwise, the wait will timeout after @timeout_ms milliseconds.
*
* Returns 0 if the register matches the desired condition, or -ETIMEOUT.
*/
int __intel_wait_for_register(struct intel_uncore *uncore,
i915_reg_t reg,
u32 mask,
u32 value,
unsigned int fast_timeout_us,
unsigned int slow_timeout_ms,
u32 *out_value)
{
unsigned fw =
intel_uncore_forcewake_for_reg(uncore, reg, FW_REG_READ);
u32 reg_value;
int ret;
might_sleep_if(slow_timeout_ms);
spin_lock_irq(&uncore->lock);
intel_uncore_forcewake_get__locked(uncore, fw);
ret = __intel_wait_for_register_fw(uncore,
reg, mask, value,
fast_timeout_us, 0, &reg_value);
intel_uncore_forcewake_put__locked(uncore, fw);
spin_unlock_irq(&uncore->lock);
if (ret && slow_timeout_ms)
ret = __wait_for(reg_value = intel_uncore_read_notrace(uncore,
reg),
(reg_value & mask) == value,
slow_timeout_ms * 1000, 10, 1000);
/* just trace the final value */
trace_i915_reg_rw(false, reg, reg_value, sizeof(reg_value), true);
if (out_value)
*out_value = reg_value;
return ret;
}
bool intel_uncore_unclaimed_mmio(struct intel_uncore *uncore)
{
return check_for_unclaimed_mmio(uncore);
}
bool
intel_uncore_arm_unclaimed_mmio_detection(struct intel_uncore *uncore)
{
bool ret = false;
spin_lock_irq(&uncore->lock);
if (unlikely(uncore->unclaimed_mmio_check <= 0))
goto out;
if (unlikely(intel_uncore_unclaimed_mmio(uncore))) {
if (!i915_modparams.mmio_debug) {
DRM_DEBUG("Unclaimed register detected, "
"enabling oneshot unclaimed register reporting. "
"Please use i915.mmio_debug=N for more information.\n");
i915_modparams.mmio_debug++;
}
uncore->unclaimed_mmio_check--;
ret = true;
}
out:
spin_unlock_irq(&uncore->lock);
return ret;
}
/**
* intel_uncore_forcewake_for_reg - which forcewake domains are needed to access
* a register
* @uncore: pointer to struct intel_uncore
* @reg: register in question
* @op: operation bitmask of FW_REG_READ and/or FW_REG_WRITE
*
* Returns a set of forcewake domains required to be taken with for example
* intel_uncore_forcewake_get for the specified register to be accessible in the
* specified mode (read, write or read/write) with raw mmio accessors.
*
* NOTE: On Gen6 and Gen7 write forcewake domain (FORCEWAKE_RENDER) requires the
* callers to do FIFO management on their own or risk losing writes.
*/
enum forcewake_domains
intel_uncore_forcewake_for_reg(struct intel_uncore *uncore,
i915_reg_t reg, unsigned int op)
{
enum forcewake_domains fw_domains = 0;
WARN_ON(!op);
if (!intel_uncore_has_forcewake(uncore))
return 0;
if (op & FW_REG_READ)
fw_domains = uncore->funcs.read_fw_domains(uncore, reg);
if (op & FW_REG_WRITE)
fw_domains |= uncore->funcs.write_fw_domains(uncore, reg);
WARN_ON(fw_domains & ~uncore->fw_domains);
return fw_domains;
}
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftests/mock_uncore.c"
#include "selftests/intel_uncore.c"
#endif
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