diff options
Diffstat (limited to 'kernel/drivers/gpu/drm/i915/intel_uncore.c')
-rw-r--r-- | kernel/drivers/gpu/drm/i915/intel_uncore.c | 1429 |
1 files changed, 1429 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/i915/intel_uncore.c b/kernel/drivers/gpu/drm/i915/intel_uncore.c new file mode 100644 index 000000000..ff2a74651 --- /dev/null +++ b/kernel/drivers/gpu/drm/i915/intel_uncore.c @@ -0,0 +1,1429 @@ +/* + * 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 <linux/pm_runtime.h> + +#define FORCEWAKE_ACK_TIMEOUT_MS 2 + +#define __raw_i915_read8(dev_priv__, reg__) readb((dev_priv__)->regs + (reg__)) +#define __raw_i915_write8(dev_priv__, reg__, val__) writeb(val__, (dev_priv__)->regs + (reg__)) + +#define __raw_i915_read16(dev_priv__, reg__) readw((dev_priv__)->regs + (reg__)) +#define __raw_i915_write16(dev_priv__, reg__, val__) writew(val__, (dev_priv__)->regs + (reg__)) + +#define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__)) +#define __raw_i915_write32(dev_priv__, reg__, val__) writel(val__, (dev_priv__)->regs + (reg__)) + +#define __raw_i915_read64(dev_priv__, reg__) readq((dev_priv__)->regs + (reg__)) +#define __raw_i915_write64(dev_priv__, reg__, val__) writeq(val__, (dev_priv__)->regs + (reg__)) + +#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((sizeof(forcewake_domain_names)/sizeof(const char *)) != + FW_DOMAIN_ID_COUNT); + + if (id >= 0 && id < FW_DOMAIN_ID_COUNT) + return forcewake_domain_names[id]; + + WARN_ON(id); + + return "unknown"; +} + +static void +assert_device_not_suspended(struct drm_i915_private *dev_priv) +{ + WARN_ONCE(HAS_RUNTIME_PM(dev_priv->dev) && dev_priv->pm.suspended, + "Device suspended\n"); +} + +static inline void +fw_domain_reset(const struct intel_uncore_forcewake_domain *d) +{ + WARN_ON(d->reg_set == 0); + __raw_i915_write32(d->i915, d->reg_set, d->val_reset); +} + +static inline void +fw_domain_arm_timer(struct intel_uncore_forcewake_domain *d) +{ + mod_timer_pinned(&d->timer, jiffies + 1); +} + +static inline void +fw_domain_wait_ack_clear(const struct intel_uncore_forcewake_domain *d) +{ + if (wait_for_atomic((__raw_i915_read32(d->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(const struct intel_uncore_forcewake_domain *d) +{ + __raw_i915_write32(d->i915, d->reg_set, d->val_set); +} + +static inline void +fw_domain_wait_ack(const struct intel_uncore_forcewake_domain *d) +{ + if (wait_for_atomic((__raw_i915_read32(d->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 intel_uncore_forcewake_domain *d) +{ + __raw_i915_write32(d->i915, d->reg_set, d->val_clear); +} + +static inline void +fw_domain_posting_read(const struct intel_uncore_forcewake_domain *d) +{ + /* something from same cacheline, but not from the set register */ + if (d->reg_post) + __raw_posting_read(d->i915, d->reg_post); +} + +static void +fw_domains_get(struct drm_i915_private *dev_priv, enum forcewake_domains fw_domains) +{ + struct intel_uncore_forcewake_domain *d; + enum forcewake_domain_id id; + + for_each_fw_domain_mask(d, fw_domains, dev_priv, id) { + fw_domain_wait_ack_clear(d); + fw_domain_get(d); + fw_domain_wait_ack(d); + } +} + +static void +fw_domains_put(struct drm_i915_private *dev_priv, enum forcewake_domains fw_domains) +{ + struct intel_uncore_forcewake_domain *d; + enum forcewake_domain_id id; + + for_each_fw_domain_mask(d, fw_domains, dev_priv, id) { + fw_domain_put(d); + fw_domain_posting_read(d); + } +} + +static void +fw_domains_posting_read(struct drm_i915_private *dev_priv) +{ + struct intel_uncore_forcewake_domain *d; + enum forcewake_domain_id id; + + /* No need to do for all, just do for first found */ + for_each_fw_domain(d, dev_priv, id) { + fw_domain_posting_read(d); + break; + } +} + +static void +fw_domains_reset(struct drm_i915_private *dev_priv, enum forcewake_domains fw_domains) +{ + struct intel_uncore_forcewake_domain *d; + enum forcewake_domain_id id; + + if (dev_priv->uncore.fw_domains == 0) + return; + + for_each_fw_domain_mask(d, fw_domains, dev_priv, id) + fw_domain_reset(d); + + fw_domains_posting_read(dev_priv); +} + +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 void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv) +{ + u32 gtfifodbg; + + gtfifodbg = __raw_i915_read32(dev_priv, GTFIFODBG); + if (WARN(gtfifodbg, "GT wake FIFO error 0x%x\n", gtfifodbg)) + __raw_i915_write32(dev_priv, GTFIFODBG, gtfifodbg); +} + +static void fw_domains_put_with_fifo(struct drm_i915_private *dev_priv, + enum forcewake_domains fw_domains) +{ + fw_domains_put(dev_priv, fw_domains); + gen6_gt_check_fifodbg(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 int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv) +{ + int ret = 0; + + /* 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->dev)) + dev_priv->uncore.fifo_count = fifo_free_entries(dev_priv); + + if (dev_priv->uncore.fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) { + int loop = 500; + u32 fifo = fifo_free_entries(dev_priv); + + while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) { + udelay(10); + fifo = fifo_free_entries(dev_priv); + } + if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES)) + ++ret; + dev_priv->uncore.fifo_count = fifo; + } + dev_priv->uncore.fifo_count--; + + return ret; +} + +static void intel_uncore_fw_release_timer(unsigned long arg) +{ + struct intel_uncore_forcewake_domain *domain = (void *)arg; + unsigned long irqflags; + + assert_device_not_suspended(domain->i915); + + spin_lock_irqsave(&domain->i915->uncore.lock, irqflags); + if (WARN_ON(domain->wake_count == 0)) + domain->wake_count++; + + if (--domain->wake_count == 0) + domain->i915->uncore.funcs.force_wake_put(domain->i915, + 1 << domain->id); + + spin_unlock_irqrestore(&domain->i915->uncore.lock, irqflags); +} + +void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + unsigned long irqflags; + struct intel_uncore_forcewake_domain *domain; + int retry_count = 100; + enum forcewake_domain_id id; + enum forcewake_domains fw = 0, 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) { + active_domains = 0; + + for_each_fw_domain(domain, dev_priv, id) { + if (del_timer_sync(&domain->timer) == 0) + continue; + + intel_uncore_fw_release_timer((unsigned long)domain); + } + + spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); + + for_each_fw_domain(domain, dev_priv, id) { + if (timer_pending(&domain->timer)) + active_domains |= (1 << id); + } + + 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); + + for_each_fw_domain(domain, dev_priv, id) + if (domain->wake_count) + fw |= 1 << id; + + if (fw) + dev_priv->uncore.funcs.force_wake_put(dev_priv, fw); + + fw_domains_reset(dev_priv, FORCEWAKE_ALL); + + 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) || IS_GEN7(dev)) + 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 void intel_uncore_ellc_detect(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if ((IS_HASWELL(dev) || IS_BROADWELL(dev) || + INTEL_INFO(dev)->gen >= 9) && + (__raw_i915_read32(dev_priv, HSW_EDRAM_PRESENT) & EDRAM_ENABLED)) { + /* The docs do not explain exactly how the calculation can be + * made. It is somewhat guessable, but for now, it's always + * 128MB. + * NB: We can't write IDICR yet because we do not have gt funcs + * set up */ + dev_priv->ellc_size = 128; + DRM_INFO("Found %zuMB of eLLC\n", dev_priv->ellc_size); + } +} + +static void __intel_uncore_early_sanitize(struct drm_device *dev, + bool restore_forcewake) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if (HAS_FPGA_DBG_UNCLAIMED(dev)) + __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM); + + /* clear out old GT FIFO errors */ + if (IS_GEN6(dev) || IS_GEN7(dev)) + __raw_i915_write32(dev_priv, GTFIFODBG, + __raw_i915_read32(dev_priv, GTFIFODBG)); + + /* WaDisableShadowRegForCpd:chv */ + if (IS_CHERRYVIEW(dev)) { + __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, restore_forcewake); +} + +void intel_uncore_early_sanitize(struct drm_device *dev, bool restore_forcewake) +{ + __intel_uncore_early_sanitize(dev, restore_forcewake); + i915_check_and_clear_faults(dev); +} + +void intel_uncore_sanitize(struct drm_device *dev) +{ + /* BIOS often leaves RC6 enabled, but disable it for hw init */ + intel_disable_gt_powersave(dev); +} + +/** + * 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; + struct intel_uncore_forcewake_domain *domain; + enum forcewake_domain_id id; + + if (!dev_priv->uncore.funcs.force_wake_get) + return; + + WARN_ON(dev_priv->pm.suspended); + + fw_domains &= dev_priv->uncore.fw_domains; + + spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); + + for_each_fw_domain_mask(domain, fw_domains, dev_priv, id) { + if (domain->wake_count++) + fw_domains &= ~(1 << id); + } + + if (fw_domains) + dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains); + + spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); +} + +/** + * 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; + struct intel_uncore_forcewake_domain *domain; + enum forcewake_domain_id id; + + if (!dev_priv->uncore.funcs.force_wake_put) + return; + + fw_domains &= dev_priv->uncore.fw_domains; + + spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); + + for_each_fw_domain_mask(domain, fw_domains, dev_priv, id) { + if (WARN_ON(domain->wake_count == 0)) + continue; + + if (--domain->wake_count) + continue; + + domain->wake_count++; + fw_domain_arm_timer(domain); + } + + spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); +} + +void assert_forcewakes_inactive(struct drm_i915_private *dev_priv) +{ + struct intel_uncore_forcewake_domain *domain; + enum forcewake_domain_id id; + + if (!dev_priv->uncore.funcs.force_wake_get) + return; + + for_each_fw_domain(domain, dev_priv, id) + WARN_ON(domain->wake_count); +} + +/* We give fast paths for the really cool registers */ +#define NEEDS_FORCE_WAKE(dev_priv, reg) \ + ((reg) < 0x40000 && (reg) != FORCEWAKE) + +#define REG_RANGE(reg, start, end) ((reg) >= (start) && (reg) < (end)) + +#define FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg) \ + (REG_RANGE((reg), 0x2000, 0x4000) || \ + REG_RANGE((reg), 0x5000, 0x8000) || \ + REG_RANGE((reg), 0xB000, 0x12000) || \ + REG_RANGE((reg), 0x2E000, 0x30000)) + +#define FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg) \ + (REG_RANGE((reg), 0x12000, 0x14000) || \ + REG_RANGE((reg), 0x22000, 0x24000) || \ + REG_RANGE((reg), 0x30000, 0x40000)) + +#define FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg) \ + (REG_RANGE((reg), 0x2000, 0x4000) || \ + REG_RANGE((reg), 0x5200, 0x8000) || \ + REG_RANGE((reg), 0x8300, 0x8500) || \ + REG_RANGE((reg), 0xB000, 0xB480) || \ + REG_RANGE((reg), 0xE000, 0xE800)) + +#define FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg) \ + (REG_RANGE((reg), 0x8800, 0x8900) || \ + REG_RANGE((reg), 0xD000, 0xD800) || \ + REG_RANGE((reg), 0x12000, 0x14000) || \ + REG_RANGE((reg), 0x1A000, 0x1C000) || \ + REG_RANGE((reg), 0x1E800, 0x1EA00) || \ + REG_RANGE((reg), 0x30000, 0x38000)) + +#define FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg) \ + (REG_RANGE((reg), 0x4000, 0x5000) || \ + REG_RANGE((reg), 0x8000, 0x8300) || \ + REG_RANGE((reg), 0x8500, 0x8600) || \ + REG_RANGE((reg), 0x9000, 0xB000) || \ + REG_RANGE((reg), 0xF000, 0x10000)) + +#define FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) \ + REG_RANGE((reg), 0xB00, 0x2000) + +#define FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) \ + (REG_RANGE((reg), 0x2000, 0x2700) || \ + REG_RANGE((reg), 0x3000, 0x4000) || \ + REG_RANGE((reg), 0x5200, 0x8000) || \ + REG_RANGE((reg), 0x8140, 0x8160) || \ + REG_RANGE((reg), 0x8300, 0x8500) || \ + REG_RANGE((reg), 0x8C00, 0x8D00) || \ + REG_RANGE((reg), 0xB000, 0xB480) || \ + REG_RANGE((reg), 0xE000, 0xE900) || \ + REG_RANGE((reg), 0x24400, 0x24800)) + +#define FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) \ + (REG_RANGE((reg), 0x8130, 0x8140) || \ + REG_RANGE((reg), 0x8800, 0x8A00) || \ + REG_RANGE((reg), 0xD000, 0xD800) || \ + REG_RANGE((reg), 0x12000, 0x14000) || \ + REG_RANGE((reg), 0x1A000, 0x1EA00) || \ + REG_RANGE((reg), 0x30000, 0x40000)) + +#define FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg) \ + REG_RANGE((reg), 0x9400, 0x9800) + +#define FORCEWAKE_GEN9_BLITTER_RANGE_OFFSET(reg) \ + ((reg) < 0x40000 &&\ + !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg) && \ + !FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg) && \ + !FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg) && \ + !FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg)) + +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 +hsw_unclaimed_reg_debug(struct drm_i915_private *dev_priv, u32 reg, bool read, + bool before) +{ + const char *op = read ? "reading" : "writing to"; + const char *when = before ? "before" : "after"; + + if (!i915.mmio_debug) + return; + + if (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM) { + WARN(1, "Unclaimed register detected %s %s register 0x%x\n", + when, op, reg); + __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM); + i915.mmio_debug--; /* Only report the first N failures */ + } +} + +static void +hsw_unclaimed_reg_detect(struct drm_i915_private *dev_priv) +{ + static bool mmio_debug_once = true; + + if (i915.mmio_debug || !mmio_debug_once) + return; + + if (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM) { + DRM_DEBUG("Unclaimed register detected, " + "enabling oneshot unclaimed register reporting. " + "Please use i915.mmio_debug=N for more information.\n"); + __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM); + i915.mmio_debug = mmio_debug_once--; + } +} + +#define GEN2_READ_HEADER(x) \ + u##x val = 0; \ + assert_device_not_suspended(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, off_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, off_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) \ + unsigned long irqflags; \ + u##x val = 0; \ + assert_device_not_suspended(dev_priv); \ + spin_lock_irqsave(&dev_priv->uncore.lock, irqflags) + +#define GEN6_READ_FOOTER \ + spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \ + trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \ + return val + +static inline void __force_wake_get(struct drm_i915_private *dev_priv, + enum forcewake_domains fw_domains) +{ + struct intel_uncore_forcewake_domain *domain; + enum forcewake_domain_id id; + + if (WARN_ON(!fw_domains)) + return; + + /* Ideally GCC would be constant-fold and eliminate this loop */ + for_each_fw_domain_mask(domain, fw_domains, dev_priv, id) { + if (domain->wake_count) { + fw_domains &= ~(1 << id); + continue; + } + + domain->wake_count++; + fw_domain_arm_timer(domain); + } + + if (fw_domains) + dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_domains); +} + +#define __vgpu_read(x) \ +static u##x \ +vgpu_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \ + GEN6_READ_HEADER(x); \ + val = __raw_i915_read##x(dev_priv, reg); \ + GEN6_READ_FOOTER; \ +} + +#define __gen6_read(x) \ +static u##x \ +gen6_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \ + GEN6_READ_HEADER(x); \ + hsw_unclaimed_reg_debug(dev_priv, reg, true, true); \ + if (NEEDS_FORCE_WAKE((dev_priv), (reg))) \ + __force_wake_get(dev_priv, FORCEWAKE_RENDER); \ + val = __raw_i915_read##x(dev_priv, reg); \ + hsw_unclaimed_reg_debug(dev_priv, reg, true, false); \ + GEN6_READ_FOOTER; \ +} + +#define __vlv_read(x) \ +static u##x \ +vlv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \ + GEN6_READ_HEADER(x); \ + if (FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg)) \ + __force_wake_get(dev_priv, FORCEWAKE_RENDER); \ + else if (FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg)) \ + __force_wake_get(dev_priv, FORCEWAKE_MEDIA); \ + val = __raw_i915_read##x(dev_priv, reg); \ + GEN6_READ_FOOTER; \ +} + +#define __chv_read(x) \ +static u##x \ +chv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \ + GEN6_READ_HEADER(x); \ + if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) \ + __force_wake_get(dev_priv, FORCEWAKE_RENDER); \ + else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) \ + __force_wake_get(dev_priv, FORCEWAKE_MEDIA); \ + else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) \ + __force_wake_get(dev_priv, \ + FORCEWAKE_RENDER | FORCEWAKE_MEDIA); \ + val = __raw_i915_read##x(dev_priv, reg); \ + GEN6_READ_FOOTER; \ +} + +#define SKL_NEEDS_FORCE_WAKE(dev_priv, reg) \ + ((reg) < 0x40000 && !FORCEWAKE_GEN9_UNCORE_RANGE_OFFSET(reg)) + +#define __gen9_read(x) \ +static u##x \ +gen9_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \ + enum forcewake_domains fw_engine; \ + GEN6_READ_HEADER(x); \ + if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg))) \ + fw_engine = 0; \ + else if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg)) \ + fw_engine = FORCEWAKE_RENDER; \ + else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg)) \ + fw_engine = FORCEWAKE_MEDIA; \ + else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg)) \ + fw_engine = FORCEWAKE_RENDER | FORCEWAKE_MEDIA; \ + else \ + fw_engine = FORCEWAKE_BLITTER; \ + if (fw_engine) \ + __force_wake_get(dev_priv, fw_engine); \ + val = __raw_i915_read##x(dev_priv, reg); \ + GEN6_READ_FOOTER; \ +} + +__vgpu_read(8) +__vgpu_read(16) +__vgpu_read(32) +__vgpu_read(64) +__gen9_read(8) +__gen9_read(16) +__gen9_read(32) +__gen9_read(64) +__chv_read(8) +__chv_read(16) +__chv_read(32) +__chv_read(64) +__vlv_read(8) +__vlv_read(16) +__vlv_read(32) +__vlv_read(64) +__gen6_read(8) +__gen6_read(16) +__gen6_read(32) +__gen6_read(64) + +#undef __gen9_read +#undef __chv_read +#undef __vlv_read +#undef __gen6_read +#undef __vgpu_read +#undef GEN6_READ_FOOTER +#undef GEN6_READ_HEADER + +#define GEN2_WRITE_HEADER \ + trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \ + assert_device_not_suspended(dev_priv); \ + +#define GEN2_WRITE_FOOTER + +#define __gen2_write(x) \ +static void \ +gen2_write##x(struct drm_i915_private *dev_priv, off_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, off_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) +__gen5_write(64) +__gen2_write(8) +__gen2_write(16) +__gen2_write(32) +__gen2_write(64) + +#undef __gen5_write +#undef __gen2_write + +#undef GEN2_WRITE_FOOTER +#undef GEN2_WRITE_HEADER + +#define GEN6_WRITE_HEADER \ + unsigned long irqflags; \ + trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \ + assert_device_not_suspended(dev_priv); \ + spin_lock_irqsave(&dev_priv->uncore.lock, irqflags) + +#define GEN6_WRITE_FOOTER \ + spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags) + +#define __gen6_write(x) \ +static void \ +gen6_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \ + u32 __fifo_ret = 0; \ + GEN6_WRITE_HEADER; \ + if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \ + __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \ + } \ + __raw_i915_write##x(dev_priv, reg, val); \ + if (unlikely(__fifo_ret)) { \ + gen6_gt_check_fifodbg(dev_priv); \ + } \ + GEN6_WRITE_FOOTER; \ +} + +#define __hsw_write(x) \ +static void \ +hsw_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \ + u32 __fifo_ret = 0; \ + GEN6_WRITE_HEADER; \ + if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \ + __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \ + } \ + hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \ + __raw_i915_write##x(dev_priv, reg, val); \ + if (unlikely(__fifo_ret)) { \ + gen6_gt_check_fifodbg(dev_priv); \ + } \ + hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \ + hsw_unclaimed_reg_detect(dev_priv); \ + GEN6_WRITE_FOOTER; \ +} + +#define __vgpu_write(x) \ +static void vgpu_write##x(struct drm_i915_private *dev_priv, \ + off_t reg, u##x val, bool trace) { \ + GEN6_WRITE_HEADER; \ + __raw_i915_write##x(dev_priv, reg, val); \ + GEN6_WRITE_FOOTER; \ +} + +static const u32 gen8_shadowed_regs[] = { + FORCEWAKE_MT, + GEN6_RPNSWREQ, + GEN6_RC_VIDEO_FREQ, + RING_TAIL(RENDER_RING_BASE), + RING_TAIL(GEN6_BSD_RING_BASE), + RING_TAIL(VEBOX_RING_BASE), + RING_TAIL(BLT_RING_BASE), + /* TODO: Other registers are not yet used */ +}; + +static bool is_gen8_shadowed(struct drm_i915_private *dev_priv, u32 reg) +{ + int i; + for (i = 0; i < ARRAY_SIZE(gen8_shadowed_regs); i++) + if (reg == gen8_shadowed_regs[i]) + return true; + + return false; +} + +#define __gen8_write(x) \ +static void \ +gen8_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \ + GEN6_WRITE_HEADER; \ + hsw_unclaimed_reg_debug(dev_priv, reg, false, true); \ + if (reg < 0x40000 && !is_gen8_shadowed(dev_priv, reg)) \ + __force_wake_get(dev_priv, FORCEWAKE_RENDER); \ + __raw_i915_write##x(dev_priv, reg, val); \ + hsw_unclaimed_reg_debug(dev_priv, reg, false, false); \ + hsw_unclaimed_reg_detect(dev_priv); \ + GEN6_WRITE_FOOTER; \ +} + +#define __chv_write(x) \ +static void \ +chv_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \ + bool shadowed = is_gen8_shadowed(dev_priv, reg); \ + GEN6_WRITE_HEADER; \ + if (!shadowed) { \ + if (FORCEWAKE_CHV_RENDER_RANGE_OFFSET(reg)) \ + __force_wake_get(dev_priv, FORCEWAKE_RENDER); \ + else if (FORCEWAKE_CHV_MEDIA_RANGE_OFFSET(reg)) \ + __force_wake_get(dev_priv, FORCEWAKE_MEDIA); \ + else if (FORCEWAKE_CHV_COMMON_RANGE_OFFSET(reg)) \ + __force_wake_get(dev_priv, FORCEWAKE_RENDER | FORCEWAKE_MEDIA); \ + } \ + __raw_i915_write##x(dev_priv, reg, val); \ + GEN6_WRITE_FOOTER; \ +} + +static const u32 gen9_shadowed_regs[] = { + RING_TAIL(RENDER_RING_BASE), + RING_TAIL(GEN6_BSD_RING_BASE), + RING_TAIL(VEBOX_RING_BASE), + RING_TAIL(BLT_RING_BASE), + FORCEWAKE_BLITTER_GEN9, + FORCEWAKE_RENDER_GEN9, + FORCEWAKE_MEDIA_GEN9, + GEN6_RPNSWREQ, + GEN6_RC_VIDEO_FREQ, + /* TODO: Other registers are not yet used */ +}; + +static bool is_gen9_shadowed(struct drm_i915_private *dev_priv, u32 reg) +{ + int i; + for (i = 0; i < ARRAY_SIZE(gen9_shadowed_regs); i++) + if (reg == gen9_shadowed_regs[i]) + return true; + + return false; +} + +#define __gen9_write(x) \ +static void \ +gen9_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, \ + bool trace) { \ + enum forcewake_domains fw_engine; \ + GEN6_WRITE_HEADER; \ + if (!SKL_NEEDS_FORCE_WAKE((dev_priv), (reg)) || \ + is_gen9_shadowed(dev_priv, reg)) \ + fw_engine = 0; \ + else if (FORCEWAKE_GEN9_RENDER_RANGE_OFFSET(reg)) \ + fw_engine = FORCEWAKE_RENDER; \ + else if (FORCEWAKE_GEN9_MEDIA_RANGE_OFFSET(reg)) \ + fw_engine = FORCEWAKE_MEDIA; \ + else if (FORCEWAKE_GEN9_COMMON_RANGE_OFFSET(reg)) \ + fw_engine = FORCEWAKE_RENDER | FORCEWAKE_MEDIA; \ + else \ + fw_engine = FORCEWAKE_BLITTER; \ + if (fw_engine) \ + __force_wake_get(dev_priv, fw_engine); \ + __raw_i915_write##x(dev_priv, reg, val); \ + GEN6_WRITE_FOOTER; \ +} + +__gen9_write(8) +__gen9_write(16) +__gen9_write(32) +__gen9_write(64) +__chv_write(8) +__chv_write(16) +__chv_write(32) +__chv_write(64) +__gen8_write(8) +__gen8_write(16) +__gen8_write(32) +__gen8_write(64) +__hsw_write(8) +__hsw_write(16) +__hsw_write(32) +__hsw_write(64) +__gen6_write(8) +__gen6_write(16) +__gen6_write(32) +__gen6_write(64) +__vgpu_write(8) +__vgpu_write(16) +__vgpu_write(32) +__vgpu_write(64) + +#undef __gen9_write +#undef __chv_write +#undef __gen8_write +#undef __hsw_write +#undef __gen6_write +#undef __vgpu_write +#undef GEN6_WRITE_FOOTER +#undef GEN6_WRITE_HEADER + +#define ASSIGN_WRITE_MMIO_VFUNCS(x) \ +do { \ + dev_priv->uncore.funcs.mmio_writeb = x##_write8; \ + dev_priv->uncore.funcs.mmio_writew = x##_write16; \ + dev_priv->uncore.funcs.mmio_writel = x##_write32; \ + dev_priv->uncore.funcs.mmio_writeq = x##_write64; \ +} while (0) + +#define ASSIGN_READ_MMIO_VFUNCS(x) \ +do { \ + dev_priv->uncore.funcs.mmio_readb = x##_read8; \ + dev_priv->uncore.funcs.mmio_readw = x##_read16; \ + dev_priv->uncore.funcs.mmio_readl = x##_read32; \ + dev_priv->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, + u32 reg_set, u32 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); + + d->wake_count = 0; + d->reg_set = reg_set; + d->reg_ack = reg_ack; + + if (IS_GEN6(dev_priv)) { + d->val_reset = 0; + d->val_set = FORCEWAKE_KERNEL; + d->val_clear = 0; + } else { + /* WaRsClearFWBitsAtReset:bdw,skl */ + d->val_reset = _MASKED_BIT_DISABLE(0xffff); + d->val_set = _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL); + d->val_clear = _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL); + } + + if (IS_VALLEYVIEW(dev_priv)) + d->reg_post = FORCEWAKE_ACK_VLV; + else if (IS_GEN6(dev_priv) || IS_GEN7(dev_priv) || IS_GEN8(dev_priv)) + d->reg_post = ECOBUS; + else + d->reg_post = 0; + + d->i915 = dev_priv; + d->id = domain_id; + + setup_timer(&d->timer, intel_uncore_fw_release_timer, (unsigned long)d); + + dev_priv->uncore.fw_domains |= (1 << domain_id); + + fw_domain_reset(d); +} + +static void intel_uncore_fw_domains_init(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if (INTEL_INFO(dev_priv->dev)->gen <= 5) + return; + + if (IS_GEN9(dev)) { + 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)) { + dev_priv->uncore.funcs.force_wake_get = fw_domains_get; + if (!IS_CHERRYVIEW(dev)) + dev_priv->uncore.funcs.force_wake_put = + fw_domains_put_with_fifo; + else + 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) || IS_BROADWELL(dev)) { + 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)) { + 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_with_fifo; + + /* 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); + + mutex_lock(&dev->struct_mutex); + fw_domains_get_with_thread_status(dev_priv, FORCEWAKE_ALL); + ecobus = __raw_i915_read32(dev_priv, ECOBUS); + fw_domains_put_with_fifo(dev_priv, FORCEWAKE_ALL); + mutex_unlock(&dev->struct_mutex); + + 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)) { + dev_priv->uncore.funcs.force_wake_get = + fw_domains_get_with_thread_status; + dev_priv->uncore.funcs.force_wake_put = + fw_domains_put_with_fifo; + 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); +} + +void intel_uncore_init(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + i915_check_vgpu(dev); + + intel_uncore_ellc_detect(dev); + intel_uncore_fw_domains_init(dev); + __intel_uncore_early_sanitize(dev, false); + + switch (INTEL_INFO(dev)->gen) { + default: + MISSING_CASE(INTEL_INFO(dev)->gen); + return; + case 9: + ASSIGN_WRITE_MMIO_VFUNCS(gen9); + ASSIGN_READ_MMIO_VFUNCS(gen9); + break; + case 8: + if (IS_CHERRYVIEW(dev)) { + ASSIGN_WRITE_MMIO_VFUNCS(chv); + ASSIGN_READ_MMIO_VFUNCS(chv); + + } else { + ASSIGN_WRITE_MMIO_VFUNCS(gen8); + ASSIGN_READ_MMIO_VFUNCS(gen6); + } + break; + case 7: + case 6: + if (IS_HASWELL(dev)) { + ASSIGN_WRITE_MMIO_VFUNCS(hsw); + } else { + ASSIGN_WRITE_MMIO_VFUNCS(gen6); + } + + if (IS_VALLEYVIEW(dev)) { + ASSIGN_READ_MMIO_VFUNCS(vlv); + } else { + ASSIGN_READ_MMIO_VFUNCS(gen6); + } + break; + case 5: + ASSIGN_WRITE_MMIO_VFUNCS(gen5); + ASSIGN_READ_MMIO_VFUNCS(gen5); + break; + case 4: + case 3: + case 2: + ASSIGN_WRITE_MMIO_VFUNCS(gen2); + ASSIGN_READ_MMIO_VFUNCS(gen2); + break; + } + + if (intel_vgpu_active(dev)) { + ASSIGN_WRITE_MMIO_VFUNCS(vgpu); + ASSIGN_READ_MMIO_VFUNCS(vgpu); + } + + i915_check_and_clear_faults(dev); +} +#undef ASSIGN_WRITE_MMIO_VFUNCS +#undef ASSIGN_READ_MMIO_VFUNCS + +void intel_uncore_fini(struct drm_device *dev) +{ + /* Paranoia: make sure we have disabled everything before we exit. */ + intel_uncore_sanitize(dev); + intel_uncore_forcewake_reset(dev, false); +} + +#define GEN_RANGE(l, h) GENMASK(h, l) + +static const struct register_whitelist { + uint64_t offset; + uint32_t size; + /* supported gens, 0x10 for 4, 0x30 for 4 and 5, etc. */ + uint32_t gen_bitmask; +} whitelist[] = { + { RING_TIMESTAMP(RENDER_RING_BASE), 8, 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 = dev->dev_private; + struct drm_i915_reg_read *reg = data; + struct register_whitelist const *entry = whitelist; + int i, ret = 0; + + for (i = 0; i < ARRAY_SIZE(whitelist); i++, entry++) { + if (entry->offset == reg->offset && + (1 << INTEL_INFO(dev)->gen & entry->gen_bitmask)) + break; + } + + if (i == ARRAY_SIZE(whitelist)) + return -EINVAL; + + intel_runtime_pm_get(dev_priv); + + switch (entry->size) { + case 8: + reg->val = I915_READ64(reg->offset); + break; + case 4: + reg->val = I915_READ(reg->offset); + break; + case 2: + reg->val = I915_READ16(reg->offset); + break; + case 1: + reg->val = I915_READ8(reg->offset); + break; + default: + MISSING_CASE(entry->size); + ret = -EINVAL; + goto out; + } + +out: + intel_runtime_pm_put(dev_priv); + return ret; +} + +int i915_get_reset_stats_ioctl(struct drm_device *dev, + void *data, struct drm_file *file) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_i915_reset_stats *args = data; + struct i915_ctx_hang_stats *hs; + struct intel_context *ctx; + int ret; + + if (args->flags || args->pad) + return -EINVAL; + + if (args->ctx_id == DEFAULT_CONTEXT_HANDLE && !capable(CAP_SYS_ADMIN)) + return -EPERM; + + ret = mutex_lock_interruptible(&dev->struct_mutex); + if (ret) + return ret; + + ctx = i915_gem_context_get(file->driver_priv, args->ctx_id); + if (IS_ERR(ctx)) { + mutex_unlock(&dev->struct_mutex); + return PTR_ERR(ctx); + } + hs = &ctx->hang_stats; + + if (capable(CAP_SYS_ADMIN)) + args->reset_count = i915_reset_count(&dev_priv->gpu_error); + else + args->reset_count = 0; + + args->batch_active = hs->batch_active; + args->batch_pending = hs->batch_pending; + + mutex_unlock(&dev->struct_mutex); + + return 0; +} + +static int i915_reset_complete(struct drm_device *dev) +{ + u8 gdrst; + pci_read_config_byte(dev->pdev, I915_GDRST, &gdrst); + return (gdrst & GRDOM_RESET_STATUS) == 0; +} + +static int i915_do_reset(struct drm_device *dev) +{ + /* assert reset for at least 20 usec */ + pci_write_config_byte(dev->pdev, I915_GDRST, GRDOM_RESET_ENABLE); + udelay(20); + pci_write_config_byte(dev->pdev, I915_GDRST, 0); + + return wait_for(i915_reset_complete(dev), 500); +} + +static int g4x_reset_complete(struct drm_device *dev) +{ + u8 gdrst; + pci_read_config_byte(dev->pdev, I915_GDRST, &gdrst); + return (gdrst & GRDOM_RESET_ENABLE) == 0; +} + +static int g33_do_reset(struct drm_device *dev) +{ + pci_write_config_byte(dev->pdev, I915_GDRST, GRDOM_RESET_ENABLE); + return wait_for(g4x_reset_complete(dev), 500); +} + +static int g4x_do_reset(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + int ret; + + pci_write_config_byte(dev->pdev, I915_GDRST, + GRDOM_RENDER | GRDOM_RESET_ENABLE); + ret = wait_for(g4x_reset_complete(dev), 500); + if (ret) + return ret; + + /* WaVcpClkGateDisableForMediaReset:ctg,elk */ + I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) | VCP_UNIT_CLOCK_GATE_DISABLE); + POSTING_READ(VDECCLK_GATE_D); + + pci_write_config_byte(dev->pdev, I915_GDRST, + GRDOM_MEDIA | GRDOM_RESET_ENABLE); + ret = wait_for(g4x_reset_complete(dev), 500); + if (ret) + return ret; + + /* WaVcpClkGateDisableForMediaReset:ctg,elk */ + I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) & ~VCP_UNIT_CLOCK_GATE_DISABLE); + POSTING_READ(VDECCLK_GATE_D); + + pci_write_config_byte(dev->pdev, I915_GDRST, 0); + + return 0; +} + +static int ironlake_do_reset(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + int ret; + + I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR, + ILK_GRDOM_RENDER | ILK_GRDOM_RESET_ENABLE); + ret = wait_for((I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) & + ILK_GRDOM_RESET_ENABLE) == 0, 500); + if (ret) + return ret; + + I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR, + ILK_GRDOM_MEDIA | ILK_GRDOM_RESET_ENABLE); + ret = wait_for((I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) & + ILK_GRDOM_RESET_ENABLE) == 0, 500); + if (ret) + return ret; + + I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR, 0); + + return 0; +} + +static int gen6_do_reset(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + int ret; + + /* Reset the chip */ + + /* GEN6_GDRST is not in the gt power well, no need to check + * for fifo space for the write or forcewake the chip for + * the read + */ + __raw_i915_write32(dev_priv, GEN6_GDRST, GEN6_GRDOM_FULL); + + /* Spin waiting for the device to ack the reset request */ + ret = wait_for((__raw_i915_read32(dev_priv, GEN6_GDRST) & GEN6_GRDOM_FULL) == 0, 500); + + intel_uncore_forcewake_reset(dev, true); + + return ret; +} + +int intel_gpu_reset(struct drm_device *dev) +{ + if (INTEL_INFO(dev)->gen >= 6) + return gen6_do_reset(dev); + else if (IS_GEN5(dev)) + return ironlake_do_reset(dev); + else if (IS_G4X(dev)) + return g4x_do_reset(dev); + else if (IS_G33(dev)) + return g33_do_reset(dev); + else if (INTEL_INFO(dev)->gen >= 3) + return i915_do_reset(dev); + else + return -ENODEV; +} + +void intel_uncore_check_errors(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if (HAS_FPGA_DBG_UNCLAIMED(dev) && + (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) { + DRM_ERROR("Unclaimed register before interrupt\n"); + __raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM); + } +} |