| /* |
| * 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 "i915_drv.h" |
| #include "intel_drv.h" |
| #include "i915_vgpu.h" |
| |
| #include <asm/iosf_mbi.h> |
| #include <linux/pm_runtime.h> |
| |
| #define FORCEWAKE_ACK_TIMEOUT_MS 50 |
| #define GT_FIFO_TIMEOUT_MS 10 |
| |
| #define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32((dev_priv__), (reg__)) |
| |
| static const char * const forcewake_domain_names[] = { |
| "render", |
| "blitter", |
| "media", |
| }; |
| |
| 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"; |
| } |
| |
| static inline void |
| fw_domain_reset(struct drm_i915_private *i915, |
| const struct intel_uncore_forcewake_domain *d) |
| { |
| __raw_i915_write32(i915, d->reg_set, i915->uncore.fw_reset); |
| } |
| |
| static inline void |
| fw_domain_arm_timer(struct intel_uncore_forcewake_domain *d) |
| { |
| d->wake_count++; |
| hrtimer_start_range_ns(&d->timer, |
| NSEC_PER_MSEC, |
| NSEC_PER_MSEC, |
| HRTIMER_MODE_REL); |
| } |
| |
| static inline void |
| fw_domain_wait_ack_clear(const struct drm_i915_private *i915, |
| const struct intel_uncore_forcewake_domain *d) |
| { |
| if (wait_for_atomic((__raw_i915_read32(i915, d->reg_ack) & |
| FORCEWAKE_KERNEL) == 0, |
| FORCEWAKE_ACK_TIMEOUT_MS)) |
| DRM_ERROR("%s: timed out waiting for forcewake ack to clear.\n", |
| intel_uncore_forcewake_domain_to_str(d->id)); |
| } |
| |
| static inline void |
| fw_domain_get(struct drm_i915_private *i915, |
| const struct intel_uncore_forcewake_domain *d) |
| { |
| __raw_i915_write32(i915, d->reg_set, i915->uncore.fw_set); |
| } |
| |
| static inline void |
| fw_domain_wait_ack(const struct drm_i915_private *i915, |
| const struct intel_uncore_forcewake_domain *d) |
| { |
| if (wait_for_atomic((__raw_i915_read32(i915, d->reg_ack) & |
| FORCEWAKE_KERNEL), |
| FORCEWAKE_ACK_TIMEOUT_MS)) |
| DRM_ERROR("%s: timed out waiting for forcewake ack request.\n", |
| intel_uncore_forcewake_domain_to_str(d->id)); |
| } |
| |
| static inline void |
| fw_domain_put(const struct drm_i915_private *i915, |
| const struct intel_uncore_forcewake_domain *d) |
| { |
| __raw_i915_write32(i915, d->reg_set, i915->uncore.fw_clear); |
| } |
| |
| static void |
| fw_domains_get(struct drm_i915_private *i915, enum forcewake_domains fw_domains) |
| { |
| struct intel_uncore_forcewake_domain *d; |
| unsigned int tmp; |
| |
| GEM_BUG_ON(fw_domains & ~i915->uncore.fw_domains); |
| |
| for_each_fw_domain_masked(d, fw_domains, i915, tmp) { |
| fw_domain_wait_ack_clear(i915, d); |
| fw_domain_get(i915, d); |
| } |
| |
| for_each_fw_domain_masked(d, fw_domains, i915, tmp) |
| fw_domain_wait_ack(i915, d); |
| |
| i915->uncore.fw_domains_active |= fw_domains; |
| } |
| |
| static void |
| fw_domains_put(struct drm_i915_private *i915, enum forcewake_domains fw_domains) |
| { |
| struct intel_uncore_forcewake_domain *d; |
| unsigned int tmp; |
| |
| GEM_BUG_ON(fw_domains & ~i915->uncore.fw_domains); |
| |
| for_each_fw_domain_masked(d, fw_domains, i915, tmp) |
| fw_domain_put(i915, d); |
| |
| i915->uncore.fw_domains_active &= ~fw_domains; |
| } |
| |
| static void |
| fw_domains_reset(struct drm_i915_private *i915, |
| enum forcewake_domains fw_domains) |
| { |
| struct intel_uncore_forcewake_domain *d; |
| unsigned int tmp; |
| |
| if (!fw_domains) |
| return; |
| |
| GEM_BUG_ON(fw_domains & ~i915->uncore.fw_domains); |
| |
| for_each_fw_domain_masked(d, fw_domains, i915, tmp) |
| fw_domain_reset(i915, d); |
| } |
| |
| static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv) |
| { |
| /* w/a for a sporadic read returning 0 by waiting for the GT |
| * thread to wake up. |
| */ |
| if (wait_for_atomic_us((__raw_i915_read32(dev_priv, GEN6_GT_THREAD_STATUS_REG) & |
| GEN6_GT_THREAD_STATUS_CORE_MASK) == 0, 500)) |
| DRM_ERROR("GT thread status wait timed out\n"); |
| } |
| |
| static void fw_domains_get_with_thread_status(struct drm_i915_private *dev_priv, |
| enum forcewake_domains fw_domains) |
| { |
| fw_domains_get(dev_priv, fw_domains); |
| |
| /* WaRsForcewakeWaitTC0:snb,ivb,hsw,bdw,vlv */ |
| __gen6_gt_wait_for_thread_c0(dev_priv); |
| } |
| |
| static inline u32 fifo_free_entries(struct drm_i915_private *dev_priv) |
| { |
| u32 count = __raw_i915_read32(dev_priv, GTFIFOCTL); |
| |
| return count & GT_FIFO_FREE_ENTRIES_MASK; |
| } |
| |
| static void __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv) |
| { |
| 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(dev_priv)) |
| n = fifo_free_entries(dev_priv); |
| else |
| n = dev_priv->uncore.fifo_count; |
| |
| if (n <= GT_FIFO_NUM_RESERVED_ENTRIES) { |
| if (wait_for_atomic((n = fifo_free_entries(dev_priv)) > |
| GT_FIFO_NUM_RESERVED_ENTRIES, |
| GT_FIFO_TIMEOUT_MS)) { |
| DRM_DEBUG("GT_FIFO timeout, entries: %u\n", n); |
| return; |
| } |
| } |
| |
| dev_priv->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 drm_i915_private *dev_priv = |
| container_of(domain, struct drm_i915_private, uncore.fw_domain[domain->id]); |
| unsigned long irqflags; |
| |
| assert_rpm_device_not_suspended(dev_priv); |
| |
| if (xchg(&domain->active, false)) |
| return HRTIMER_RESTART; |
| |
| spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); |
| if (WARN_ON(domain->wake_count == 0)) |
| domain->wake_count++; |
| |
| if (--domain->wake_count == 0) |
| dev_priv->uncore.funcs.force_wake_put(dev_priv, domain->mask); |
| |
| spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); |
| |
| return HRTIMER_NORESTART; |
| } |
| |
| static void intel_uncore_forcewake_reset(struct drm_i915_private *dev_priv, |
| bool restore) |
| { |
| unsigned long irqflags; |
| struct intel_uncore_forcewake_domain *domain; |
| int retry_count = 100; |
| enum forcewake_domains fw, active_domains; |
| |
| /* 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, dev_priv, tmp) { |
| smp_store_mb(domain->active, false); |
| if (hrtimer_cancel(&domain->timer) == 0) |
| continue; |
| |
| intel_uncore_fw_release_timer(&domain->timer); |
| } |
| |
| spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); |
| |
| for_each_fw_domain(domain, dev_priv, 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(&dev_priv->uncore.lock, irqflags); |
| cond_resched(); |
| } |
| |
| WARN_ON(active_domains); |
| |
| fw = dev_priv->uncore.fw_domains_active; |
| if (fw) |
| dev_priv->uncore.funcs.force_wake_put(dev_priv, fw); |
| |
| fw_domains_reset(dev_priv, dev_priv->uncore.fw_domains); |
| |
| if (restore) { /* If reset with a user forcewake, try to restore */ |
| if (fw) |
| dev_priv->uncore.funcs.force_wake_get(dev_priv, fw); |
| |
| if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv)) |
| dev_priv->uncore.fifo_count = |
| fifo_free_entries(dev_priv); |
| } |
| |
| if (!restore) |
| assert_forcewakes_inactive(dev_priv); |
| |
| spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); |
| } |
| |
| static u64 gen9_edram_size(struct drm_i915_private *dev_priv) |
| { |
| const unsigned int ways[8] = { 4, 8, 12, 16, 16, 16, 16, 16 }; |
| const unsigned int sets[4] = { 1, 1, 2, 2 }; |
| const u32 cap = dev_priv->edram_cap; |
| |
| return EDRAM_NUM_BANKS(cap) * |
| ways[EDRAM_WAYS_IDX(cap)] * |
| sets[EDRAM_SETS_IDX(cap)] * |
| 1024 * 1024; |
| } |
| |
| u64 intel_uncore_edram_size(struct drm_i915_private *dev_priv) |
| { |
| if (!HAS_EDRAM(dev_priv)) |
| return 0; |
| |
| /* The needed capability bits for size calculation |
| * are not there with pre gen9 so return 128MB always. |
| */ |
| if (INTEL_GEN(dev_priv) < 9) |
| return 128 * 1024 * 1024; |
| |
| return gen9_edram_size(dev_priv); |
| } |
| |
| static void intel_uncore_edram_detect(struct drm_i915_private *dev_priv) |
| { |
| if (IS_HASWELL(dev_priv) || |
| IS_BROADWELL(dev_priv) || |
| INTEL_GEN(dev_priv) >= 9) { |
| dev_priv->edram_cap = __raw_i915_read32(dev_priv, |
| HSW_EDRAM_CAP); |
| |
| /* NB: We can't write IDICR yet because we do not have gt funcs |
| * set up */ |
| } else { |
| dev_priv->edram_cap = 0; |
| } |
| |
| if (HAS_EDRAM(dev_priv)) |
| DRM_INFO("Found %lluMB of eDRAM\n", |
| intel_uncore_edram_size(dev_priv) / (1024 * 1024)); |
| } |
| |
| static bool |
| fpga_check_for_unclaimed_mmio(struct drm_i915_private *dev_priv) |
| { |
| u32 dbg; |
| |
| dbg = __raw_i915_read32(dev_priv, FPGA_DBG); |
| if (likely(!(dbg & FPGA_DBG_RM_NOCLAIM))) |
| return false; |
| |
| __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM); |
| |
| return true; |
| } |
| |
| static bool |
| vlv_check_for_unclaimed_mmio(struct drm_i915_private *dev_priv) |
| { |
| u32 cer; |
| |
| cer = __raw_i915_read32(dev_priv, CLAIM_ER); |
| if (likely(!(cer & (CLAIM_ER_OVERFLOW | CLAIM_ER_CTR_MASK)))) |
| return false; |
| |
| __raw_i915_write32(dev_priv, CLAIM_ER, CLAIM_ER_CLR); |
| |
| return true; |
| } |
| |
| static bool |
| gen6_check_for_fifo_debug(struct drm_i915_private *dev_priv) |
| { |
| u32 fifodbg; |
| |
| fifodbg = __raw_i915_read32(dev_priv, GTFIFODBG); |
| |
| if (unlikely(fifodbg)) { |
| DRM_DEBUG_DRIVER("GTFIFODBG = 0x08%x\n", fifodbg); |
| __raw_i915_write32(dev_priv, GTFIFODBG, fifodbg); |
| } |
| |
| return fifodbg; |
| } |
| |
| static bool |
| check_for_unclaimed_mmio(struct drm_i915_private *dev_priv) |
| { |
| bool ret = false; |
| |
| if (HAS_FPGA_DBG_UNCLAIMED(dev_priv)) |
| ret |= fpga_check_for_unclaimed_mmio(dev_priv); |
| |
| if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) |
| ret |= vlv_check_for_unclaimed_mmio(dev_priv); |
| |
| if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv)) |
| ret |= gen6_check_for_fifo_debug(dev_priv); |
| |
| return ret; |
| } |
| |
| static void __intel_uncore_early_sanitize(struct drm_i915_private *dev_priv, |
| bool restore_forcewake) |
| { |
| /* clear out unclaimed reg detection bit */ |
| if (check_for_unclaimed_mmio(dev_priv)) |
| DRM_DEBUG("unclaimed mmio detected on uncore init, clearing\n"); |
| |
| /* WaDisableShadowRegForCpd:chv */ |
| if (IS_CHERRYVIEW(dev_priv)) { |
| __raw_i915_write32(dev_priv, GTFIFOCTL, |
| __raw_i915_read32(dev_priv, GTFIFOCTL) | |
| GT_FIFO_CTL_BLOCK_ALL_POLICY_STALL | |
| GT_FIFO_CTL_RC6_POLICY_STALL); |
| } |
| |
| intel_uncore_forcewake_reset(dev_priv, restore_forcewake); |
| } |
| |
| void intel_uncore_suspend(struct drm_i915_private *dev_priv) |
| { |
| iosf_mbi_unregister_pmic_bus_access_notifier( |
| &dev_priv->uncore.pmic_bus_access_nb); |
| intel_uncore_forcewake_reset(dev_priv, false); |
| } |
| |
| void intel_uncore_resume_early(struct drm_i915_private *dev_priv) |
| { |
| __intel_uncore_early_sanitize(dev_priv, true); |
| iosf_mbi_register_pmic_bus_access_notifier( |
| &dev_priv->uncore.pmic_bus_access_nb); |
| i915_check_and_clear_faults(dev_priv); |
| } |
| |
| void intel_uncore_sanitize(struct drm_i915_private *dev_priv) |
| { |
| i915.enable_rc6 = sanitize_rc6_option(dev_priv, i915.enable_rc6); |
| |
| /* BIOS often leaves RC6 enabled, but disable it for hw init */ |
| intel_sanitize_gt_powersave(dev_priv); |
| } |
| |
| static void __intel_uncore_forcewake_get(struct drm_i915_private *dev_priv, |
| enum forcewake_domains fw_domains) |
| { |
| struct intel_uncore_forcewake_domain *domain; |
| unsigned int tmp; |
| |
| fw_domains &= dev_priv->uncore.fw_domains; |
| |
| for_each_fw_domain_masked(domain, fw_domains, dev_priv, tmp) { |
| if (domain->wake_count++) { |
| fw_domains &= ~domain->mask; |
| domain->active = true; |
| } |
| } |
| |
| if (fw_domains) |
| dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains); |
| } |
| |
| /** |
| * intel_uncore_forcewake_get - grab forcewake domain references |
| * @dev_priv: i915 device instance |
| * @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 drm_i915_private *dev_priv, |
| enum forcewake_domains fw_domains) |
| { |
| unsigned long irqflags; |
| |
| if (!dev_priv->uncore.funcs.force_wake_get) |
| return; |
| |
| assert_rpm_wakelock_held(dev_priv); |
| |
| spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); |
| __intel_uncore_forcewake_get(dev_priv, fw_domains); |
| spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); |
| } |
| |
| /** |
| * intel_uncore_forcewake_get__locked - grab forcewake domain references |
| * @dev_priv: i915 device instance |
| * @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 drm_i915_private *dev_priv, |
| enum forcewake_domains fw_domains) |
| { |
| lockdep_assert_held(&dev_priv->uncore.lock); |
| |
| if (!dev_priv->uncore.funcs.force_wake_get) |
| return; |
| |
| __intel_uncore_forcewake_get(dev_priv, fw_domains); |
| } |
| |
| static void __intel_uncore_forcewake_put(struct drm_i915_private *dev_priv, |
| enum forcewake_domains fw_domains) |
| { |
| struct intel_uncore_forcewake_domain *domain; |
| unsigned int tmp; |
| |
| fw_domains &= dev_priv->uncore.fw_domains; |
| |
| for_each_fw_domain_masked(domain, fw_domains, dev_priv, tmp) { |
| if (WARN_ON(domain->wake_count == 0)) |
| continue; |
| |
| if (--domain->wake_count) { |
| domain->active = true; |
| continue; |
| } |
| |
| fw_domain_arm_timer(domain); |
| } |
| } |
| |
| /** |
| * intel_uncore_forcewake_put - release a forcewake domain reference |
| * @dev_priv: i915 device instance |
| * @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 drm_i915_private *dev_priv, |
| enum forcewake_domains fw_domains) |
| { |
| unsigned long irqflags; |
| |
| if (!dev_priv->uncore.funcs.force_wake_put) |
| return; |
| |
| spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); |
| __intel_uncore_forcewake_put(dev_priv, fw_domains); |
| spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); |
| } |
| |
| /** |
| * intel_uncore_forcewake_put__locked - grab forcewake domain references |
| * @dev_priv: i915 device instance |
| * @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 drm_i915_private *dev_priv, |
| enum forcewake_domains fw_domains) |
| { |
| lockdep_assert_held(&dev_priv->uncore.lock); |
| |
| if (!dev_priv->uncore.funcs.force_wake_put) |
| return; |
| |
| __intel_uncore_forcewake_put(dev_priv, fw_domains); |
| } |
| |
| void assert_forcewakes_inactive(struct drm_i915_private *dev_priv) |
| { |
| if (!dev_priv->uncore.funcs.force_wake_get) |
| return; |
| |
| WARN_ON(dev_priv->uncore.fw_domains_active); |
| } |
| |
| /* We give fast paths for the really cool registers */ |
| #define NEEDS_FORCE_WAKE(reg) ((reg) < 0x40000) |
| |
| #define __gen6_reg_read_fw_domains(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 drm_i915_private *dev_priv, u32 offset) |
| { |
| const struct intel_forcewake_range *entry; |
| |
| entry = BSEARCH(offset, |
| dev_priv->uncore.fw_domains_table, |
| dev_priv->uncore.fw_domains_table_entries, |
| fw_range_cmp); |
| |
| if (!entry) |
| return 0; |
| |
| WARN(entry->domains & ~dev_priv->uncore.fw_domains, |
| "Uninitialized forcewake domain(s) 0x%x accessed at 0x%x\n", |
| entry->domains & ~dev_priv->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(offset) \ |
| ({ \ |
| enum forcewake_domains __fwd = 0; \ |
| if (NEEDS_FORCE_WAKE((offset))) \ |
| __fwd = find_fw_domain(dev_priv, 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 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; |
| } |
| |
| static bool is_gen8_shadowed(u32 offset) |
| { |
| const i915_reg_t *regs = gen8_shadowed_regs; |
| |
| return BSEARCH(offset, regs, ARRAY_SIZE(gen8_shadowed_regs), |
| mmio_reg_cmp); |
| } |
| |
| #define __gen8_reg_write_fw_domains(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(offset) \ |
| ({ \ |
| enum forcewake_domains __fwd = 0; \ |
| if (NEEDS_FORCE_WAKE((offset)) && !is_gen8_shadowed(offset)) \ |
| __fwd = find_fw_domain(dev_priv, 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), |
| }; |
| |
| static void |
| ilk_dummy_write(struct drm_i915_private *dev_priv) |
| { |
| /* WaIssueDummyWriteToWakeupFromRC6:ilk Issue a dummy write to wake up |
| * the chip from rc6 before touching it for real. MI_MODE is masked, |
| * hence harmless to write 0 into. */ |
| __raw_i915_write32(dev_priv, MI_MODE, 0); |
| } |
| |
| static void |
| __unclaimed_reg_debug(struct drm_i915_private *dev_priv, |
| const i915_reg_t reg, |
| const bool read, |
| const bool before) |
| { |
| if (WARN(check_for_unclaimed_mmio(dev_priv) && !before, |
| "Unclaimed %s register 0x%x\n", |
| read ? "read from" : "write to", |
| i915_mmio_reg_offset(reg))) |
| i915.mmio_debug--; /* Only report the first N failures */ |
| } |
| |
| static inline void |
| unclaimed_reg_debug(struct drm_i915_private *dev_priv, |
| const i915_reg_t reg, |
| const bool read, |
| const bool before) |
| { |
| if (likely(!i915.mmio_debug)) |
| return; |
| |
| __unclaimed_reg_debug(dev_priv, reg, read, before); |
| } |
| |
| #define GEN2_READ_HEADER(x) \ |
| u##x val = 0; \ |
| assert_rpm_wakelock_held(dev_priv); |
| |
| #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 drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \ |
| GEN2_READ_HEADER(x); \ |
| val = __raw_i915_read##x(dev_priv, reg); \ |
| GEN2_READ_FOOTER; \ |
| } |
| |
| #define __gen5_read(x) \ |
| static u##x \ |
| gen5_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \ |
| GEN2_READ_HEADER(x); \ |
| ilk_dummy_write(dev_priv); \ |
| val = __raw_i915_read##x(dev_priv, 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(dev_priv); \ |
| spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); \ |
| unclaimed_reg_debug(dev_priv, reg, true, true) |
| |
| #define GEN6_READ_FOOTER \ |
| unclaimed_reg_debug(dev_priv, reg, true, false); \ |
| spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \ |
| trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \ |
| return val |
| |
| static noinline void ___force_wake_auto(struct drm_i915_private *dev_priv, |
| enum forcewake_domains fw_domains) |
| { |
| struct intel_uncore_forcewake_domain *domain; |
| unsigned int tmp; |
| |
| GEM_BUG_ON(fw_domains & ~dev_priv->uncore.fw_domains); |
| |
| for_each_fw_domain_masked(domain, fw_domains, dev_priv, tmp) |
| fw_domain_arm_timer(domain); |
| |
| dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains); |
| } |
| |
| static inline void __force_wake_auto(struct drm_i915_private *dev_priv, |
| enum forcewake_domains fw_domains) |
| { |
| if (WARN_ON(!fw_domains)) |
| return; |
| |
| /* Turn on all requested but inactive supported forcewake domains. */ |
| fw_domains &= dev_priv->uncore.fw_domains; |
| fw_domains &= ~dev_priv->uncore.fw_domains_active; |
| |
| if (fw_domains) |
| ___force_wake_auto(dev_priv, fw_domains); |
| } |
| |
| #define __gen_read(func, x) \ |
| static u##x \ |
| func##_read##x(struct drm_i915_private *dev_priv, i915_reg_t reg, bool trace) { \ |
| enum forcewake_domains fw_engine; \ |
| GEN6_READ_HEADER(x); \ |
| fw_engine = __##func##_reg_read_fw_domains(offset); \ |
| if (fw_engine) \ |
| __force_wake_auto(dev_priv, fw_engine); \ |
| val = __raw_i915_read##x(dev_priv, reg); \ |
| GEN6_READ_FOOTER; \ |
| } |
| #define __gen6_read(x) __gen_read(gen6, x) |
| #define __fwtable_read(x) __gen_read(fwtable, x) |
| |
| __fwtable_read(8) |
| __fwtable_read(16) |
| __fwtable_read(32) |
| __fwtable_read(64) |
| __gen6_read(8) |
| __gen6_read(16) |
| __gen6_read(32) |
| __gen6_read(64) |
| |
| #undef __fwtable_read |
| #undef __gen6_read |
| #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(dev_priv); \ |
| |
| #define GEN2_WRITE_FOOTER |
| |
| #define __gen2_write(x) \ |
| static void \ |
| gen2_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \ |
| GEN2_WRITE_HEADER; \ |
| __raw_i915_write##x(dev_priv, reg, val); \ |
| GEN2_WRITE_FOOTER; \ |
| } |
| |
| #define __gen5_write(x) \ |
| static void \ |
| gen5_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \ |
| GEN2_WRITE_HEADER; \ |
| ilk_dummy_write(dev_priv); \ |
| __raw_i915_write##x(dev_priv, 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(dev_priv); \ |
| spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); \ |
| unclaimed_reg_debug(dev_priv, reg, false, true) |
| |
| #define GEN6_WRITE_FOOTER \ |
| unclaimed_reg_debug(dev_priv, reg, false, false); \ |
| spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags) |
| |
| #define __gen6_write(x) \ |
| static void \ |
| gen6_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \ |
| GEN6_WRITE_HEADER; \ |
| if (NEEDS_FORCE_WAKE(offset)) \ |
| __gen6_gt_wait_for_fifo(dev_priv); \ |
| __raw_i915_write##x(dev_priv, reg, val); \ |
| GEN6_WRITE_FOOTER; \ |
| } |
| |
| #define __gen_write(func, x) \ |
| static void \ |
| func##_write##x(struct drm_i915_private *dev_priv, i915_reg_t reg, u##x val, bool trace) { \ |
| enum forcewake_domains fw_engine; \ |
| GEN6_WRITE_HEADER; \ |
| fw_engine = __##func##_reg_write_fw_domains(offset); \ |
| if (fw_engine) \ |
| __force_wake_auto(dev_priv, fw_engine); \ |
| __raw_i915_write##x(dev_priv, reg, val); \ |
| GEN6_WRITE_FOOTER; \ |
| } |
| #define __gen8_write(x) __gen_write(gen8, x) |
| #define __fwtable_write(x) __gen_write(fwtable, x) |
| |
| __fwtable_write(8) |
| __fwtable_write(16) |
| __fwtable_write(32) |
| __gen8_write(8) |
| __gen8_write(16) |
| __gen8_write(32) |
| __gen6_write(8) |
| __gen6_write(16) |
| __gen6_write(32) |
| |
| #undef __fwtable_write |
| #undef __gen8_write |
| #undef __gen6_write |
| #undef GEN6_WRITE_FOOTER |
| #undef GEN6_WRITE_HEADER |
| |
| #define ASSIGN_WRITE_MMIO_VFUNCS(i915, x) \ |
| do { \ |
| (i915)->uncore.funcs.mmio_writeb = x##_write8; \ |
| (i915)->uncore.funcs.mmio_writew = x##_write16; \ |
| (i915)->uncore.funcs.mmio_writel = x##_write32; \ |
| } while (0) |
| |
| #define ASSIGN_READ_MMIO_VFUNCS(i915, x) \ |
| do { \ |
| (i915)->uncore.funcs.mmio_readb = x##_read8; \ |
| (i915)->uncore.funcs.mmio_readw = x##_read16; \ |
| (i915)->uncore.funcs.mmio_readl = x##_read32; \ |
| (i915)->uncore.funcs.mmio_readq = x##_read64; \ |
| } while (0) |
| |
| |
| static void fw_domain_init(struct drm_i915_private *dev_priv, |
| enum forcewake_domain_id domain_id, |
| i915_reg_t reg_set, |
| i915_reg_t reg_ack) |
| { |
| struct intel_uncore_forcewake_domain *d; |
| |
| if (WARN_ON(domain_id >= FW_DOMAIN_ID_COUNT)) |
| return; |
| |
| d = &dev_priv->uncore.fw_domain[domain_id]; |
| |
| WARN_ON(d->wake_count); |
| |
| WARN_ON(!i915_mmio_reg_valid(reg_set)); |
| WARN_ON(!i915_mmio_reg_valid(reg_ack)); |
| |
| d->wake_count = 0; |
| d->reg_set = reg_set; |
| d->reg_ack = 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)); |
| |
| d->mask = BIT(domain_id); |
| |
| hrtimer_init(&d->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
| d->timer.function = intel_uncore_fw_release_timer; |
| |
| dev_priv->uncore.fw_domains |= BIT(domain_id); |
| |
| fw_domain_reset(dev_priv, d); |
| } |
| |
| static void intel_uncore_fw_domains_init(struct drm_i915_private *dev_priv) |
| { |
| if (INTEL_GEN(dev_priv) <= 5 || intel_vgpu_active(dev_priv)) |
| return; |
| |
| if (IS_GEN6(dev_priv)) { |
| dev_priv->uncore.fw_reset = 0; |
| dev_priv->uncore.fw_set = FORCEWAKE_KERNEL; |
| dev_priv->uncore.fw_clear = 0; |
| } else { |
| /* WaRsClearFWBitsAtReset:bdw,skl */ |
| dev_priv->uncore.fw_reset = _MASKED_BIT_DISABLE(0xffff); |
| dev_priv->uncore.fw_set = _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL); |
| dev_priv->uncore.fw_clear = _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL); |
| } |
| |
| if (INTEL_GEN(dev_priv) >= 9) { |
| dev_priv->uncore.funcs.force_wake_get = fw_domains_get; |
| dev_priv->uncore.funcs.force_wake_put = fw_domains_put; |
| fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER, |
| FORCEWAKE_RENDER_GEN9, |
| FORCEWAKE_ACK_RENDER_GEN9); |
| fw_domain_init(dev_priv, FW_DOMAIN_ID_BLITTER, |
| FORCEWAKE_BLITTER_GEN9, |
| FORCEWAKE_ACK_BLITTER_GEN9); |
| fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA, |
| FORCEWAKE_MEDIA_GEN9, FORCEWAKE_ACK_MEDIA_GEN9); |
| } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { |
| dev_priv->uncore.funcs.force_wake_get = fw_domains_get; |
| dev_priv->uncore.funcs.force_wake_put = fw_domains_put; |
| fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER, |
| FORCEWAKE_VLV, FORCEWAKE_ACK_VLV); |
| fw_domain_init(dev_priv, FW_DOMAIN_ID_MEDIA, |
| FORCEWAKE_MEDIA_VLV, FORCEWAKE_ACK_MEDIA_VLV); |
| } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) { |
| dev_priv->uncore.funcs.force_wake_get = |
| fw_domains_get_with_thread_status; |
| dev_priv->uncore.funcs.force_wake_put = fw_domains_put; |
| fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER, |
| FORCEWAKE_MT, FORCEWAKE_ACK_HSW); |
| } else if (IS_IVYBRIDGE(dev_priv)) { |
| 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. |
| */ |
| dev_priv->uncore.funcs.force_wake_get = |
| fw_domains_get_with_thread_status; |
| dev_priv->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_i915_write32(dev_priv, FORCEWAKE, 0); |
| __raw_posting_read(dev_priv, ECOBUS); |
| |
| fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER, |
| FORCEWAKE_MT, FORCEWAKE_MT_ACK); |
| |
| spin_lock_irq(&dev_priv->uncore.lock); |
| fw_domains_get_with_thread_status(dev_priv, FORCEWAKE_RENDER); |
| ecobus = __raw_i915_read32(dev_priv, ECOBUS); |
| fw_domains_put(dev_priv, FORCEWAKE_RENDER); |
| spin_unlock_irq(&dev_priv->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_init(dev_priv, FW_DOMAIN_ID_RENDER, |
| FORCEWAKE, FORCEWAKE_ACK); |
| } |
| } else if (IS_GEN6(dev_priv)) { |
| dev_priv->uncore.funcs.force_wake_get = |
| fw_domains_get_with_thread_status; |
| dev_priv->uncore.funcs.force_wake_put = fw_domains_put; |
| fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER, |
| FORCEWAKE, FORCEWAKE_ACK); |
| } |
| |
| /* All future platforms are expected to require complex power gating */ |
| WARN_ON(dev_priv->uncore.fw_domains == 0); |
| } |
| |
| #define ASSIGN_FW_DOMAINS_TABLE(d) \ |
| { \ |
| dev_priv->uncore.fw_domains_table = \ |
| (struct intel_forcewake_range *)(d); \ |
| dev_priv->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 drm_i915_private *dev_priv = container_of(nb, |
| struct drm_i915_private, 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. |
| */ |
| intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); |
| break; |
| case MBI_PMIC_BUS_ACCESS_END: |
| intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); |
| break; |
| } |
| |
| return NOTIFY_OK; |
| } |
| |
| void intel_uncore_init(struct drm_i915_private *dev_priv) |
| { |
| i915_check_vgpu(dev_priv); |
| |
| intel_uncore_edram_detect(dev_priv); |
| intel_uncore_fw_domains_init(dev_priv); |
| __intel_uncore_early_sanitize(dev_priv, false); |
| |
| dev_priv->uncore.unclaimed_mmio_check = 1; |
| dev_priv->uncore.pmic_bus_access_nb.notifier_call = |
| i915_pmic_bus_access_notifier; |
| |
| if (IS_GEN(dev_priv, 2, 4) || intel_vgpu_active(dev_priv)) { |
| ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, gen2); |
| ASSIGN_READ_MMIO_VFUNCS(dev_priv, gen2); |
| } else if (IS_GEN5(dev_priv)) { |
| ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, gen5); |
| ASSIGN_READ_MMIO_VFUNCS(dev_priv, gen5); |
| } else if (IS_GEN(dev_priv, 6, 7)) { |
| ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, gen6); |
| |
| if (IS_VALLEYVIEW(dev_priv)) { |
| ASSIGN_FW_DOMAINS_TABLE(__vlv_fw_ranges); |
| ASSIGN_READ_MMIO_VFUNCS(dev_priv, fwtable); |
| } else { |
| ASSIGN_READ_MMIO_VFUNCS(dev_priv, gen6); |
| } |
| } else if (IS_GEN8(dev_priv)) { |
| if (IS_CHERRYVIEW(dev_priv)) { |
| ASSIGN_FW_DOMAINS_TABLE(__chv_fw_ranges); |
| ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, fwtable); |
| ASSIGN_READ_MMIO_VFUNCS(dev_priv, fwtable); |
| |
| } else { |
| ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, gen8); |
| ASSIGN_READ_MMIO_VFUNCS(dev_priv, gen6); |
| } |
| } else { |
| ASSIGN_FW_DOMAINS_TABLE(__gen9_fw_ranges); |
| ASSIGN_WRITE_MMIO_VFUNCS(dev_priv, fwtable); |
| ASSIGN_READ_MMIO_VFUNCS(dev_priv, fwtable); |
| } |
| |
| iosf_mbi_register_pmic_bus_access_notifier( |
| &dev_priv->uncore.pmic_bus_access_nb); |
| |
| i915_check_and_clear_faults(dev_priv); |
| } |
| |
| void intel_uncore_fini(struct drm_i915_private *dev_priv) |
| { |
| iosf_mbi_unregister_pmic_bus_access_notifier( |
| &dev_priv->uncore.pmic_bus_access_nb); |
| |
| /* Paranoia: make sure we have disabled everything before we exit. */ |
| intel_uncore_sanitize(dev_priv); |
| intel_uncore_forcewake_reset(dev_priv, false); |
| } |
| |
| #define GEN_RANGE(l, h) GENMASK((h) - 1, (l) - 1) |
| |
| static const struct register_whitelist { |
| i915_reg_t offset_ldw, offset_udw; |
| uint32_t size; |
| /* supported gens, 0x10 for 4, 0x30 for 4 and 5, etc. */ |
| uint32_t gen_bitmask; |
| } whitelist[] = { |
| { .offset_ldw = RING_TIMESTAMP(RENDER_RING_BASE), |
| .offset_udw = RING_TIMESTAMP_UDW(RENDER_RING_BASE), |
| .size = 8, .gen_bitmask = GEN_RANGE(4, 9) }, |
| }; |
| |
| int i915_reg_read_ioctl(struct drm_device *dev, |
| void *data, struct drm_file *file) |
| { |
| struct drm_i915_private *dev_priv = to_i915(dev); |
| struct drm_i915_reg_read *reg = data; |
| struct register_whitelist const *entry = whitelist; |
| unsigned size; |
| i915_reg_t offset_ldw, offset_udw; |
| int i, ret = 0; |
| |
| for (i = 0; i < ARRAY_SIZE(whitelist); i++, entry++) { |
| if (i915_mmio_reg_offset(entry->offset_ldw) == (reg->offset & -entry->size) && |
| (INTEL_INFO(dev_priv)->gen_mask & entry->gen_bitmask)) |
| break; |
| } |
| |
| if (i == ARRAY_SIZE(whitelist)) |
| return -EINVAL; |
| |
| /* We use the low bits to encode extra flags as the register should |
| * be naturally aligned (and those that are not so aligned merely |
| * limit the available flags for that register). |
| */ |
| offset_ldw = entry->offset_ldw; |
| offset_udw = entry->offset_udw; |
| size = entry->size; |
| size |= reg->offset ^ i915_mmio_reg_offset(offset_ldw); |
| |
| intel_runtime_pm_get(dev_priv); |
| |
| switch (size) { |
| case 8 | 1: |
| reg->val = I915_READ64_2x32(offset_ldw, offset_udw); |
| break; |
| case 8: |
| reg->val = I915_READ64(offset_ldw); |
| break; |
| case 4: |
| reg->val = I915_READ(offset_ldw); |
| break; |
| case 2: |
| reg->val = I915_READ16(offset_ldw); |
| break; |
| case 1: |
| reg->val = I915_READ8(offset_ldw); |
| break; |
| default: |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| out: |
| intel_runtime_pm_put(dev_priv); |
| return ret; |
| } |
| |
| static void gen3_stop_rings(struct drm_i915_private *dev_priv) |
| { |
| struct intel_engine_cs *engine; |
| enum intel_engine_id id; |
| |
| for_each_engine(engine, dev_priv, id) { |
| const u32 base = engine->mmio_base; |
| const i915_reg_t mode = RING_MI_MODE(base); |
| |
| I915_WRITE_FW(mode, _MASKED_BIT_ENABLE(STOP_RING)); |
| if (intel_wait_for_register_fw(dev_priv, |
| mode, |
| MODE_IDLE, |
| MODE_IDLE, |
| 500)) |
| DRM_DEBUG_DRIVER("%s: timed out on STOP_RING\n", |
| engine->name); |
| |
| I915_WRITE_FW(RING_CTL(base), 0); |
| I915_WRITE_FW(RING_HEAD(base), 0); |
| I915_WRITE_FW(RING_TAIL(base), 0); |
| |
| /* Check acts as a post */ |
| if (I915_READ_FW(RING_HEAD(base)) != 0) |
| DRM_DEBUG_DRIVER("%s: ring head not parked\n", |
| engine->name); |
| } |
| } |
| |
| static bool i915_reset_complete(struct pci_dev *pdev) |
| { |
| u8 gdrst; |
| |
| pci_read_config_byte(pdev, I915_GDRST, &gdrst); |
| return (gdrst & GRDOM_RESET_STATUS) == 0; |
| } |
| |
| static int i915_do_reset(struct drm_i915_private *dev_priv, unsigned engine_mask) |
| { |
| struct pci_dev *pdev = dev_priv->drm.pdev; |
| |
| /* assert reset for at least 20 usec */ |
| pci_write_config_byte(pdev, I915_GDRST, GRDOM_RESET_ENABLE); |
| usleep_range(50, 200); |
| pci_write_config_byte(pdev, I915_GDRST, 0); |
| |
| return wait_for(i915_reset_complete(pdev), 500); |
| } |
| |
| static bool g4x_reset_complete(struct pci_dev *pdev) |
| { |
| u8 gdrst; |
| |
| pci_read_config_byte(pdev, I915_GDRST, &gdrst); |
| return (gdrst & GRDOM_RESET_ENABLE) == 0; |
| } |
| |
| static int g33_do_reset(struct drm_i915_private *dev_priv, unsigned engine_mask) |
| { |
| struct pci_dev *pdev = dev_priv->drm.pdev; |
| |
| /* Stop engines before we reset; see g4x_do_reset() below for why. */ |
| gen3_stop_rings(dev_priv); |
| |
| pci_write_config_byte(pdev, I915_GDRST, GRDOM_RESET_ENABLE); |
| return wait_for(g4x_reset_complete(pdev), 500); |
| } |
| |
| static int g4x_do_reset(struct drm_i915_private *dev_priv, unsigned engine_mask) |
| { |
| struct pci_dev *pdev = dev_priv->drm.pdev; |
| int ret; |
| |
| /* WaVcpClkGateDisableForMediaReset:ctg,elk */ |
| I915_WRITE(VDECCLK_GATE_D, |
| I915_READ(VDECCLK_GATE_D) | VCP_UNIT_CLOCK_GATE_DISABLE); |
| POSTING_READ(VDECCLK_GATE_D); |
| |
| /* We stop engines, otherwise we might get failed reset and a |
| * dead gpu (on elk). |
| * WaMediaResetMainRingCleanup:ctg,elk (presumably) |
| */ |
| gen3_stop_rings(dev_priv); |
| |
| pci_write_config_byte(pdev, I915_GDRST, |
| GRDOM_MEDIA | GRDOM_RESET_ENABLE); |
| ret = wait_for(g4x_reset_complete(pdev), 500); |
| if (ret) { |
| DRM_DEBUG_DRIVER("Wait for media reset failed\n"); |
| goto out; |
| } |
| |
| pci_write_config_byte(pdev, I915_GDRST, |
| GRDOM_RENDER | GRDOM_RESET_ENABLE); |
| ret = wait_for(g4x_reset_complete(pdev), 500); |
| if (ret) { |
| DRM_DEBUG_DRIVER("Wait for render reset failed\n"); |
| goto out; |
| } |
| |
| out: |
| pci_write_config_byte(pdev, I915_GDRST, 0); |
| |
| I915_WRITE(VDECCLK_GATE_D, |
| I915_READ(VDECCLK_GATE_D) & ~VCP_UNIT_CLOCK_GATE_DISABLE); |
| POSTING_READ(VDECCLK_GATE_D); |
| |
| return ret; |
| } |
| |
| static int ironlake_do_reset(struct drm_i915_private *dev_priv, |
| unsigned engine_mask) |
| { |
| int ret; |
| |
| I915_WRITE(ILK_GDSR, ILK_GRDOM_RENDER | ILK_GRDOM_RESET_ENABLE); |
| ret = intel_wait_for_register(dev_priv, |
| ILK_GDSR, ILK_GRDOM_RESET_ENABLE, 0, |
| 500); |
| if (ret) { |
| DRM_DEBUG_DRIVER("Wait for render reset failed\n"); |
| goto out; |
| } |
| |
| I915_WRITE(ILK_GDSR, ILK_GRDOM_MEDIA | ILK_GRDOM_RESET_ENABLE); |
| ret = intel_wait_for_register(dev_priv, |
| ILK_GDSR, ILK_GRDOM_RESET_ENABLE, 0, |
| 500); |
| if (ret) { |
| DRM_DEBUG_DRIVER("Wait for media reset failed\n"); |
| goto out; |
| } |
| |
| out: |
| I915_WRITE(ILK_GDSR, 0); |
| POSTING_READ(ILK_GDSR); |
| return ret; |
| } |
| |
| /* Reset the hardware domains (GENX_GRDOM_*) specified by mask */ |
| static int gen6_hw_domain_reset(struct drm_i915_private *dev_priv, |
| u32 hw_domain_mask) |
| { |
| int err; |
| |
| /* GEN6_GDRST is not in the gt power well, no need to check |
| * for fifo space for the write or forcewake the chip for |
| * the read |
| */ |
| __raw_i915_write32(dev_priv, GEN6_GDRST, hw_domain_mask); |
| |
| /* Wait for the device to ack the reset requests */ |
| err = intel_wait_for_register_fw(dev_priv, |
| GEN6_GDRST, hw_domain_mask, 0, |
| 500); |
| if (err) |
| DRM_DEBUG_DRIVER("Wait for 0x%08x engines reset failed\n", |
| hw_domain_mask); |
| |
| return err; |
| } |
| |
| /** |
| * gen6_reset_engines - reset individual engines |
| * @dev_priv: i915 device |
| * @engine_mask: mask of intel_ring_flag() engines or ALL_ENGINES for full reset |
| * |
| * This function will reset the individual engines that are set in engine_mask. |
| * If you provide ALL_ENGINES as mask, full global domain reset will be issued. |
| * |
| * Note: It is responsibility of the caller to handle the difference between |
| * asking full domain reset versus reset for all available individual engines. |
| * |
| * Returns 0 on success, nonzero on error. |
| */ |
| static int gen6_reset_engines(struct drm_i915_private *dev_priv, |
| unsigned engine_mask) |
| { |
| struct intel_engine_cs *engine; |
| const u32 hw_engine_mask[I915_NUM_ENGINES] = { |
| [RCS] = GEN6_GRDOM_RENDER, |
| [BCS] = GEN6_GRDOM_BLT, |
| [VCS] = GEN6_GRDOM_MEDIA, |
| [VCS2] = GEN8_GRDOM_MEDIA2, |
| [VECS] = GEN6_GRDOM_VECS, |
| }; |
| u32 hw_mask; |
| |
| if (engine_mask == ALL_ENGINES) { |
| hw_mask = GEN6_GRDOM_FULL; |
| } else { |
| unsigned int tmp; |
| |
| hw_mask = 0; |
| for_each_engine_masked(engine, dev_priv, engine_mask, tmp) |
| hw_mask |= hw_engine_mask[engine->id]; |
| } |
| |
| return gen6_hw_domain_reset(dev_priv, hw_mask); |
| } |
| |
| /** |
| * __intel_wait_for_register_fw - wait until register matches expected state |
| * @dev_priv: the i915 device |
| * @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 drm_i915_private *dev_priv, |
| 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 = I915_READ_FW(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 |
| * @dev_priv: the i915 device |
| * @reg: the register to read |
| * @mask: mask to apply to register value |
| * @value: expected value |
| * @timeout_ms: timeout in millisecond |
| * |
| * 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 drm_i915_private *dev_priv, |
| i915_reg_t reg, |
| u32 mask, |
| u32 value, |
| unsigned int timeout_ms) |
| { |
| unsigned fw = |
| intel_uncore_forcewake_for_reg(dev_priv, reg, FW_REG_READ); |
| int ret; |
| |
| might_sleep(); |
| |
| spin_lock_irq(&dev_priv->uncore.lock); |
| intel_uncore_forcewake_get__locked(dev_priv, fw); |
| |
| ret = __intel_wait_for_register_fw(dev_priv, |
| reg, mask, value, |
| 2, 0, NULL); |
| |
| intel_uncore_forcewake_put__locked(dev_priv, fw); |
| spin_unlock_irq(&dev_priv->uncore.lock); |
| |
| if (ret) |
| ret = wait_for((I915_READ_NOTRACE(reg) & mask) == value, |
| timeout_ms); |
| |
| return ret; |
| } |
| |
| static int gen8_reset_engine_start(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| int ret; |
| |
| I915_WRITE_FW(RING_RESET_CTL(engine->mmio_base), |
| _MASKED_BIT_ENABLE(RESET_CTL_REQUEST_RESET)); |
| |
| ret = intel_wait_for_register_fw(dev_priv, |
| RING_RESET_CTL(engine->mmio_base), |
| RESET_CTL_READY_TO_RESET, |
| RESET_CTL_READY_TO_RESET, |
| 700); |
| if (ret) |
| DRM_ERROR("%s: reset request timeout\n", engine->name); |
| |
| return ret; |
| } |
| |
| static void gen8_reset_engine_cancel(struct intel_engine_cs *engine) |
| { |
| struct drm_i915_private *dev_priv = engine->i915; |
| |
| I915_WRITE_FW(RING_RESET_CTL(engine->mmio_base), |
| _MASKED_BIT_DISABLE(RESET_CTL_REQUEST_RESET)); |
| } |
| |
| static int gen8_reset_engines(struct drm_i915_private *dev_priv, |
| unsigned engine_mask) |
| { |
| struct intel_engine_cs *engine; |
| unsigned int tmp; |
| |
| for_each_engine_masked(engine, dev_priv, engine_mask, tmp) |
| if (gen8_reset_engine_start(engine)) |
| goto not_ready; |
| |
| return gen6_reset_engines(dev_priv, engine_mask); |
| |
| not_ready: |
| for_each_engine_masked(engine, dev_priv, engine_mask, tmp) |
| gen8_reset_engine_cancel(engine); |
| |
| return -EIO; |
| } |
| |
| typedef int (*reset_func)(struct drm_i915_private *, unsigned engine_mask); |
| |
| static reset_func intel_get_gpu_reset(struct drm_i915_private *dev_priv) |
| { |
| if (!i915.reset) |
| return NULL; |
| |
| if (INTEL_INFO(dev_priv)->gen >= 8) |
| return gen8_reset_engines; |
| else if (INTEL_INFO(dev_priv)->gen >= 6) |
| return gen6_reset_engines; |
| else if (IS_GEN5(dev_priv)) |
| return ironlake_do_reset; |
| else if (IS_G4X(dev_priv)) |
| return g4x_do_reset; |
| else if (IS_G33(dev_priv) || IS_PINEVIEW(dev_priv)) |
| return g33_do_reset; |
| else if (INTEL_INFO(dev_priv)->gen >= 3) |
| return i915_do_reset; |
| else |
| return NULL; |
| } |
| |
| int intel_gpu_reset(struct drm_i915_private *dev_priv, unsigned engine_mask) |
| { |
| reset_func reset; |
| int retry; |
| int ret; |
| |
| might_sleep(); |
| |
| reset = intel_get_gpu_reset(dev_priv); |
| if (reset == NULL) |
| return -ENODEV; |
| |
| /* If the power well sleeps during the reset, the reset |
| * request may be dropped and never completes (causing -EIO). |
| */ |
| intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); |
| for (retry = 0; retry < 3; retry++) { |
| ret = reset(dev_priv, engine_mask); |
| if (ret != -ETIMEDOUT) |
| break; |
| |
| cond_resched(); |
| } |
| intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); |
| |
| return ret; |
| } |
| |
| bool intel_has_gpu_reset(struct drm_i915_private *dev_priv) |
| { |
| return intel_get_gpu_reset(dev_priv) != NULL; |
| } |
| |
| /* |
| * When GuC submission is enabled, GuC manages ELSP and can initiate the |
| * engine reset too. For now, fall back to full GPU reset if it is enabled. |
| */ |
| bool intel_has_reset_engine(struct drm_i915_private *dev_priv) |
| { |
| return (dev_priv->info.has_reset_engine && |
| !dev_priv->guc.execbuf_client && |
| i915.reset >= 2); |
| } |
| |
| int intel_guc_reset(struct drm_i915_private *dev_priv) |
| { |
| int ret; |
| |
| if (!HAS_GUC(dev_priv)) |
| return -EINVAL; |
| |
| intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); |
| ret = gen6_hw_domain_reset(dev_priv, GEN9_GRDOM_GUC); |
| intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); |
| |
| return ret; |
| } |
| |
| bool intel_uncore_unclaimed_mmio(struct drm_i915_private *dev_priv) |
| { |
| return check_for_unclaimed_mmio(dev_priv); |
| } |
| |
| bool |
| intel_uncore_arm_unclaimed_mmio_detection(struct drm_i915_private *dev_priv) |
| { |
| if (unlikely(i915.mmio_debug || |
| dev_priv->uncore.unclaimed_mmio_check <= 0)) |
| return false; |
| |
| if (unlikely(intel_uncore_unclaimed_mmio(dev_priv))) { |
| DRM_DEBUG("Unclaimed register detected, " |
| "enabling oneshot unclaimed register reporting. " |
| "Please use i915.mmio_debug=N for more information.\n"); |
| i915.mmio_debug++; |
| dev_priv->uncore.unclaimed_mmio_check--; |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static enum forcewake_domains |
| intel_uncore_forcewake_for_read(struct drm_i915_private *dev_priv, |
| i915_reg_t reg) |
| { |
| u32 offset = i915_mmio_reg_offset(reg); |
| enum forcewake_domains fw_domains; |
| |
| if (HAS_FWTABLE(dev_priv)) { |
| fw_domains = __fwtable_reg_read_fw_domains(offset); |
| } else if (INTEL_GEN(dev_priv) >= 6) { |
| fw_domains = __gen6_reg_read_fw_domains(offset); |
| } else { |
| WARN_ON(!IS_GEN(dev_priv, 2, 5)); |
| fw_domains = 0; |
| } |
| |
| WARN_ON(fw_domains & ~dev_priv->uncore.fw_domains); |
| |
| return fw_domains; |
| } |
| |
| static enum forcewake_domains |
| intel_uncore_forcewake_for_write(struct drm_i915_private *dev_priv, |
| i915_reg_t reg) |
| { |
| u32 offset = i915_mmio_reg_offset(reg); |
| enum forcewake_domains fw_domains; |
| |
| if (HAS_FWTABLE(dev_priv) && !IS_VALLEYVIEW(dev_priv)) { |
| fw_domains = __fwtable_reg_write_fw_domains(offset); |
| } else if (IS_GEN8(dev_priv)) { |
| fw_domains = __gen8_reg_write_fw_domains(offset); |
| } else if (IS_GEN(dev_priv, 6, 7)) { |
| fw_domains = FORCEWAKE_RENDER; |
| } else { |
| WARN_ON(!IS_GEN(dev_priv, 2, 5)); |
| fw_domains = 0; |
| } |
| |
| WARN_ON(fw_domains & ~dev_priv->uncore.fw_domains); |
| |
| return fw_domains; |
| } |
| |
| /** |
| * intel_uncore_forcewake_for_reg - which forcewake domains are needed to access |
| * a register |
| * @dev_priv: pointer to struct drm_i915_private |
| * @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 drm_i915_private *dev_priv, |
| i915_reg_t reg, unsigned int op) |
| { |
| enum forcewake_domains fw_domains = 0; |
| |
| WARN_ON(!op); |
| |
| if (intel_vgpu_active(dev_priv)) |
| return 0; |
| |
| if (op & FW_REG_READ) |
| fw_domains = intel_uncore_forcewake_for_read(dev_priv, reg); |
| |
| if (op & FW_REG_WRITE) |
| fw_domains |= intel_uncore_forcewake_for_write(dev_priv, reg); |
| |
| return fw_domains; |
| } |
| |
| #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST) |
| #include "selftests/mock_uncore.c" |
| #include "selftests/intel_uncore.c" |
| #endif |