mirror of https://gitee.com/openkylin/linux.git
1039 lines
30 KiB
C
1039 lines
30 KiB
C
/*
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* Copyright © 2013 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "i915_drv.h"
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#include "intel_drv.h"
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#define FORCEWAKE_ACK_TIMEOUT_MS 2
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#define __raw_i915_read8(dev_priv__, reg__) readb((dev_priv__)->regs + (reg__))
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#define __raw_i915_write8(dev_priv__, reg__, val__) writeb(val__, (dev_priv__)->regs + (reg__))
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#define __raw_i915_read16(dev_priv__, reg__) readw((dev_priv__)->regs + (reg__))
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#define __raw_i915_write16(dev_priv__, reg__, val__) writew(val__, (dev_priv__)->regs + (reg__))
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#define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
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#define __raw_i915_write32(dev_priv__, reg__, val__) writel(val__, (dev_priv__)->regs + (reg__))
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#define __raw_i915_read64(dev_priv__, reg__) readq((dev_priv__)->regs + (reg__))
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#define __raw_i915_write64(dev_priv__, reg__, val__) writeq(val__, (dev_priv__)->regs + (reg__))
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#define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32(dev_priv__, reg__)
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static void
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assert_device_not_suspended(struct drm_i915_private *dev_priv)
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{
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WARN(HAS_RUNTIME_PM(dev_priv->dev) && dev_priv->pm.suspended,
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"Device suspended\n");
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}
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static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
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{
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u32 gt_thread_status_mask;
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if (IS_HASWELL(dev_priv->dev))
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gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK_HSW;
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else
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gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK;
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/* w/a for a sporadic read returning 0 by waiting for the GT
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* thread to wake up.
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*/
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if (wait_for_atomic_us((__raw_i915_read32(dev_priv, GEN6_GT_THREAD_STATUS_REG) & gt_thread_status_mask) == 0, 500))
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DRM_ERROR("GT thread status wait timed out\n");
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}
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static void __gen6_gt_force_wake_reset(struct drm_i915_private *dev_priv)
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{
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__raw_i915_write32(dev_priv, FORCEWAKE, 0);
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/* something from same cacheline, but !FORCEWAKE */
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__raw_posting_read(dev_priv, ECOBUS);
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}
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static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv,
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int fw_engine)
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{
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if (wait_for_atomic((__raw_i915_read32(dev_priv, FORCEWAKE_ACK) & 1) == 0,
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FORCEWAKE_ACK_TIMEOUT_MS))
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DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
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__raw_i915_write32(dev_priv, FORCEWAKE, 1);
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/* something from same cacheline, but !FORCEWAKE */
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__raw_posting_read(dev_priv, ECOBUS);
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if (wait_for_atomic((__raw_i915_read32(dev_priv, FORCEWAKE_ACK) & 1),
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FORCEWAKE_ACK_TIMEOUT_MS))
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DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
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/* WaRsForcewakeWaitTC0:snb */
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__gen6_gt_wait_for_thread_c0(dev_priv);
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}
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static void __gen7_gt_force_wake_mt_reset(struct drm_i915_private *dev_priv)
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{
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__raw_i915_write32(dev_priv, FORCEWAKE_MT, _MASKED_BIT_DISABLE(0xffff));
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/* something from same cacheline, but !FORCEWAKE_MT */
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__raw_posting_read(dev_priv, ECOBUS);
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}
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static void __gen7_gt_force_wake_mt_get(struct drm_i915_private *dev_priv,
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int fw_engine)
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{
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u32 forcewake_ack;
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if (IS_HASWELL(dev_priv->dev) || IS_GEN8(dev_priv->dev))
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forcewake_ack = FORCEWAKE_ACK_HSW;
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else
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forcewake_ack = FORCEWAKE_MT_ACK;
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if (wait_for_atomic((__raw_i915_read32(dev_priv, forcewake_ack) & FORCEWAKE_KERNEL) == 0,
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FORCEWAKE_ACK_TIMEOUT_MS))
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DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
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__raw_i915_write32(dev_priv, FORCEWAKE_MT,
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_MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
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/* something from same cacheline, but !FORCEWAKE_MT */
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__raw_posting_read(dev_priv, ECOBUS);
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if (wait_for_atomic((__raw_i915_read32(dev_priv, forcewake_ack) & FORCEWAKE_KERNEL),
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FORCEWAKE_ACK_TIMEOUT_MS))
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DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
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/* WaRsForcewakeWaitTC0:ivb,hsw */
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if (INTEL_INFO(dev_priv->dev)->gen < 8)
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__gen6_gt_wait_for_thread_c0(dev_priv);
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}
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static void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
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{
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u32 gtfifodbg;
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gtfifodbg = __raw_i915_read32(dev_priv, GTFIFODBG);
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if (WARN(gtfifodbg, "GT wake FIFO error 0x%x\n", gtfifodbg))
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__raw_i915_write32(dev_priv, GTFIFODBG, gtfifodbg);
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}
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static void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv,
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int fw_engine)
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{
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__raw_i915_write32(dev_priv, FORCEWAKE, 0);
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/* something from same cacheline, but !FORCEWAKE */
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__raw_posting_read(dev_priv, ECOBUS);
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gen6_gt_check_fifodbg(dev_priv);
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}
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static void __gen7_gt_force_wake_mt_put(struct drm_i915_private *dev_priv,
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int fw_engine)
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{
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__raw_i915_write32(dev_priv, FORCEWAKE_MT,
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_MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
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/* something from same cacheline, but !FORCEWAKE_MT */
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__raw_posting_read(dev_priv, ECOBUS);
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if (IS_GEN7(dev_priv->dev))
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gen6_gt_check_fifodbg(dev_priv);
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}
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static int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
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{
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int ret = 0;
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/* On VLV, FIFO will be shared by both SW and HW.
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* So, we need to read the FREE_ENTRIES everytime */
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if (IS_VALLEYVIEW(dev_priv->dev))
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dev_priv->uncore.fifo_count =
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__raw_i915_read32(dev_priv, GTFIFOCTL) &
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GT_FIFO_FREE_ENTRIES_MASK;
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if (dev_priv->uncore.fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) {
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int loop = 500;
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u32 fifo = __raw_i915_read32(dev_priv, GTFIFOCTL) & GT_FIFO_FREE_ENTRIES_MASK;
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while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
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udelay(10);
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fifo = __raw_i915_read32(dev_priv, GTFIFOCTL) & GT_FIFO_FREE_ENTRIES_MASK;
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}
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if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES))
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++ret;
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dev_priv->uncore.fifo_count = fifo;
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}
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dev_priv->uncore.fifo_count--;
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return ret;
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}
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static void vlv_force_wake_reset(struct drm_i915_private *dev_priv)
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{
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__raw_i915_write32(dev_priv, FORCEWAKE_VLV,
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_MASKED_BIT_DISABLE(0xffff));
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/* something from same cacheline, but !FORCEWAKE_VLV */
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__raw_posting_read(dev_priv, FORCEWAKE_ACK_VLV);
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}
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static void __vlv_force_wake_get(struct drm_i915_private *dev_priv,
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int fw_engine)
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{
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/* Check for Render Engine */
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if (FORCEWAKE_RENDER & fw_engine) {
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if (wait_for_atomic((__raw_i915_read32(dev_priv,
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FORCEWAKE_ACK_VLV) &
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FORCEWAKE_KERNEL) == 0,
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FORCEWAKE_ACK_TIMEOUT_MS))
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DRM_ERROR("Timed out: Render forcewake old ack to clear.\n");
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__raw_i915_write32(dev_priv, FORCEWAKE_VLV,
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_MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
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if (wait_for_atomic((__raw_i915_read32(dev_priv,
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FORCEWAKE_ACK_VLV) &
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FORCEWAKE_KERNEL),
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FORCEWAKE_ACK_TIMEOUT_MS))
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DRM_ERROR("Timed out: waiting for Render to ack.\n");
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}
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/* Check for Media Engine */
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if (FORCEWAKE_MEDIA & fw_engine) {
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if (wait_for_atomic((__raw_i915_read32(dev_priv,
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FORCEWAKE_ACK_MEDIA_VLV) &
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FORCEWAKE_KERNEL) == 0,
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FORCEWAKE_ACK_TIMEOUT_MS))
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DRM_ERROR("Timed out: Media forcewake old ack to clear.\n");
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__raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_VLV,
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_MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
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if (wait_for_atomic((__raw_i915_read32(dev_priv,
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FORCEWAKE_ACK_MEDIA_VLV) &
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FORCEWAKE_KERNEL),
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FORCEWAKE_ACK_TIMEOUT_MS))
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DRM_ERROR("Timed out: waiting for media to ack.\n");
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}
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/* WaRsForcewakeWaitTC0:vlv */
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__gen6_gt_wait_for_thread_c0(dev_priv);
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}
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static void __vlv_force_wake_put(struct drm_i915_private *dev_priv,
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int fw_engine)
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{
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/* Check for Render Engine */
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if (FORCEWAKE_RENDER & fw_engine)
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__raw_i915_write32(dev_priv, FORCEWAKE_VLV,
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_MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
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/* Check for Media Engine */
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if (FORCEWAKE_MEDIA & fw_engine)
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__raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_VLV,
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_MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
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/* The below doubles as a POSTING_READ */
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gen6_gt_check_fifodbg(dev_priv);
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}
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void vlv_force_wake_get(struct drm_i915_private *dev_priv,
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int fw_engine)
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{
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unsigned long irqflags;
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spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
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if (fw_engine & FORCEWAKE_RENDER &&
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dev_priv->uncore.fw_rendercount++ != 0)
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fw_engine &= ~FORCEWAKE_RENDER;
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if (fw_engine & FORCEWAKE_MEDIA &&
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dev_priv->uncore.fw_mediacount++ != 0)
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fw_engine &= ~FORCEWAKE_MEDIA;
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if (fw_engine)
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dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_engine);
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spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
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}
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void vlv_force_wake_put(struct drm_i915_private *dev_priv,
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int fw_engine)
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{
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unsigned long irqflags;
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spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
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if (fw_engine & FORCEWAKE_RENDER) {
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WARN_ON(!dev_priv->uncore.fw_rendercount);
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if (--dev_priv->uncore.fw_rendercount != 0)
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fw_engine &= ~FORCEWAKE_RENDER;
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}
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if (fw_engine & FORCEWAKE_MEDIA) {
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WARN_ON(!dev_priv->uncore.fw_mediacount);
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if (--dev_priv->uncore.fw_mediacount != 0)
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fw_engine &= ~FORCEWAKE_MEDIA;
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}
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if (fw_engine)
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dev_priv->uncore.funcs.force_wake_put(dev_priv, fw_engine);
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spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
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}
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static void gen6_force_wake_timer(unsigned long arg)
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{
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struct drm_i915_private *dev_priv = (void *)arg;
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unsigned long irqflags;
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assert_device_not_suspended(dev_priv);
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spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
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WARN_ON(!dev_priv->uncore.forcewake_count);
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if (--dev_priv->uncore.forcewake_count == 0)
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dev_priv->uncore.funcs.force_wake_put(dev_priv, FORCEWAKE_ALL);
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spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
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intel_runtime_pm_put(dev_priv);
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}
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static void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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unsigned long irqflags;
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del_timer_sync(&dev_priv->uncore.force_wake_timer);
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/* Hold uncore.lock across reset to prevent any register access
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* with forcewake not set correctly
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*/
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spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
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if (IS_VALLEYVIEW(dev))
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vlv_force_wake_reset(dev_priv);
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else if (IS_GEN6(dev) || IS_GEN7(dev))
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__gen6_gt_force_wake_reset(dev_priv);
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if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev) || IS_GEN8(dev))
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__gen7_gt_force_wake_mt_reset(dev_priv);
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if (restore) { /* If reset with a user forcewake, try to restore */
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unsigned fw = 0;
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if (IS_VALLEYVIEW(dev)) {
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if (dev_priv->uncore.fw_rendercount)
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fw |= FORCEWAKE_RENDER;
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if (dev_priv->uncore.fw_mediacount)
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fw |= FORCEWAKE_MEDIA;
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} else {
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if (dev_priv->uncore.forcewake_count)
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fw = FORCEWAKE_ALL;
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}
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if (fw)
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dev_priv->uncore.funcs.force_wake_get(dev_priv, fw);
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if (IS_GEN6(dev) || IS_GEN7(dev))
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dev_priv->uncore.fifo_count =
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__raw_i915_read32(dev_priv, GTFIFOCTL) &
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GT_FIFO_FREE_ENTRIES_MASK;
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} else {
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dev_priv->uncore.forcewake_count = 0;
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dev_priv->uncore.fw_rendercount = 0;
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dev_priv->uncore.fw_mediacount = 0;
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}
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spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
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}
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void intel_uncore_early_sanitize(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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if (HAS_FPGA_DBG_UNCLAIMED(dev))
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__raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
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if (IS_HASWELL(dev) &&
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(__raw_i915_read32(dev_priv, HSW_EDRAM_PRESENT) == 1)) {
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/* The docs do not explain exactly how the calculation can be
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* made. It is somewhat guessable, but for now, it's always
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* 128MB.
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* NB: We can't write IDICR yet because we do not have gt funcs
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* set up */
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dev_priv->ellc_size = 128;
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DRM_INFO("Found %zuMB of eLLC\n", dev_priv->ellc_size);
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}
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/* clear out old GT FIFO errors */
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if (IS_GEN6(dev) || IS_GEN7(dev))
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__raw_i915_write32(dev_priv, GTFIFODBG,
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__raw_i915_read32(dev_priv, GTFIFODBG));
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intel_uncore_forcewake_reset(dev, false);
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}
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void intel_uncore_sanitize(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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u32 reg_val;
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/* BIOS often leaves RC6 enabled, but disable it for hw init */
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intel_disable_gt_powersave(dev);
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/* Turn off power gate, require especially for the BIOS less system */
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if (IS_VALLEYVIEW(dev)) {
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mutex_lock(&dev_priv->rps.hw_lock);
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reg_val = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS);
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if (reg_val & (PUNIT_PWRGT_PWR_GATE(PUNIT_POWER_WELL_RENDER) |
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PUNIT_PWRGT_PWR_GATE(PUNIT_POWER_WELL_MEDIA) |
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PUNIT_PWRGT_PWR_GATE(PUNIT_POWER_WELL_DISP2D)))
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vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, 0x0);
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mutex_unlock(&dev_priv->rps.hw_lock);
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}
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}
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/*
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* Generally this is called implicitly by the register read function. However,
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* if some sequence requires the GT to not power down then this function should
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* be called at the beginning of the sequence followed by a call to
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* gen6_gt_force_wake_put() at the end of the sequence.
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*/
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void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine)
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{
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unsigned long irqflags;
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if (!dev_priv->uncore.funcs.force_wake_get)
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return;
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intel_runtime_pm_get(dev_priv);
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/* Redirect to VLV specific routine */
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if (IS_VALLEYVIEW(dev_priv->dev))
|
|
return vlv_force_wake_get(dev_priv, fw_engine);
|
|
|
|
spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
|
|
if (dev_priv->uncore.forcewake_count++ == 0)
|
|
dev_priv->uncore.funcs.force_wake_get(dev_priv, FORCEWAKE_ALL);
|
|
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
|
|
}
|
|
|
|
/*
|
|
* see gen6_gt_force_wake_get()
|
|
*/
|
|
void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine)
|
|
{
|
|
unsigned long irqflags;
|
|
bool delayed = false;
|
|
|
|
if (!dev_priv->uncore.funcs.force_wake_put)
|
|
return;
|
|
|
|
/* Redirect to VLV specific routine */
|
|
if (IS_VALLEYVIEW(dev_priv->dev)) {
|
|
vlv_force_wake_put(dev_priv, fw_engine);
|
|
goto out;
|
|
}
|
|
|
|
|
|
spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
|
|
WARN_ON(!dev_priv->uncore.forcewake_count);
|
|
|
|
if (--dev_priv->uncore.forcewake_count == 0) {
|
|
dev_priv->uncore.forcewake_count++;
|
|
delayed = true;
|
|
mod_timer_pinned(&dev_priv->uncore.force_wake_timer,
|
|
jiffies + 1);
|
|
}
|
|
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
|
|
|
|
out:
|
|
if (!delayed)
|
|
intel_runtime_pm_put(dev_priv);
|
|
}
|
|
|
|
void assert_force_wake_inactive(struct drm_i915_private *dev_priv)
|
|
{
|
|
if (!dev_priv->uncore.funcs.force_wake_get)
|
|
return;
|
|
|
|
WARN_ON(dev_priv->uncore.forcewake_count > 0);
|
|
}
|
|
|
|
/* We give fast paths for the really cool registers */
|
|
#define NEEDS_FORCE_WAKE(dev_priv, reg) \
|
|
((reg) < 0x40000 && (reg) != FORCEWAKE)
|
|
|
|
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_clear(struct drm_i915_private *dev_priv, u32 reg)
|
|
{
|
|
if (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM) {
|
|
DRM_ERROR("Unknown unclaimed register before writing to %x\n",
|
|
reg);
|
|
__raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
|
|
}
|
|
}
|
|
|
|
static void
|
|
hsw_unclaimed_reg_check(struct drm_i915_private *dev_priv, u32 reg)
|
|
{
|
|
if (__raw_i915_read32(dev_priv, FPGA_DBG) & FPGA_DBG_RM_NOCLAIM) {
|
|
DRM_ERROR("Unclaimed write to %x\n", reg);
|
|
__raw_i915_write32(dev_priv, FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
|
|
}
|
|
}
|
|
|
|
#define REG_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 REG_READ_FOOTER \
|
|
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
|
|
trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
|
|
return val
|
|
|
|
#define __gen4_read(x) \
|
|
static u##x \
|
|
gen4_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
|
|
REG_READ_HEADER(x); \
|
|
val = __raw_i915_read##x(dev_priv, reg); \
|
|
REG_READ_FOOTER; \
|
|
}
|
|
|
|
#define __gen5_read(x) \
|
|
static u##x \
|
|
gen5_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
|
|
REG_READ_HEADER(x); \
|
|
ilk_dummy_write(dev_priv); \
|
|
val = __raw_i915_read##x(dev_priv, reg); \
|
|
REG_READ_FOOTER; \
|
|
}
|
|
|
|
#define __gen6_read(x) \
|
|
static u##x \
|
|
gen6_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
|
|
REG_READ_HEADER(x); \
|
|
if (dev_priv->uncore.forcewake_count == 0 && \
|
|
NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
|
|
dev_priv->uncore.funcs.force_wake_get(dev_priv, \
|
|
FORCEWAKE_ALL); \
|
|
dev_priv->uncore.forcewake_count++; \
|
|
mod_timer_pinned(&dev_priv->uncore.force_wake_timer, \
|
|
jiffies + 1); \
|
|
} \
|
|
val = __raw_i915_read##x(dev_priv, reg); \
|
|
REG_READ_FOOTER; \
|
|
}
|
|
|
|
#define __vlv_read(x) \
|
|
static u##x \
|
|
vlv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
|
|
unsigned fwengine = 0; \
|
|
REG_READ_HEADER(x); \
|
|
if (FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg)) { \
|
|
if (dev_priv->uncore.fw_rendercount == 0) \
|
|
fwengine = FORCEWAKE_RENDER; \
|
|
} else if (FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg)) { \
|
|
if (dev_priv->uncore.fw_mediacount == 0) \
|
|
fwengine = FORCEWAKE_MEDIA; \
|
|
} \
|
|
if (fwengine) \
|
|
dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
|
|
val = __raw_i915_read##x(dev_priv, reg); \
|
|
if (fwengine) \
|
|
dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
|
|
REG_READ_FOOTER; \
|
|
}
|
|
|
|
|
|
__vlv_read(8)
|
|
__vlv_read(16)
|
|
__vlv_read(32)
|
|
__vlv_read(64)
|
|
__gen6_read(8)
|
|
__gen6_read(16)
|
|
__gen6_read(32)
|
|
__gen6_read(64)
|
|
__gen5_read(8)
|
|
__gen5_read(16)
|
|
__gen5_read(32)
|
|
__gen5_read(64)
|
|
__gen4_read(8)
|
|
__gen4_read(16)
|
|
__gen4_read(32)
|
|
__gen4_read(64)
|
|
|
|
#undef __vlv_read
|
|
#undef __gen6_read
|
|
#undef __gen5_read
|
|
#undef __gen4_read
|
|
#undef REG_READ_FOOTER
|
|
#undef REG_READ_HEADER
|
|
|
|
#define REG_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 REG_WRITE_FOOTER \
|
|
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags)
|
|
|
|
#define __gen4_write(x) \
|
|
static void \
|
|
gen4_write##x(struct drm_i915_private *dev_priv, off_t reg, u##x val, bool trace) { \
|
|
REG_WRITE_HEADER; \
|
|
__raw_i915_write##x(dev_priv, reg, val); \
|
|
REG_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) { \
|
|
REG_WRITE_HEADER; \
|
|
ilk_dummy_write(dev_priv); \
|
|
__raw_i915_write##x(dev_priv, reg, val); \
|
|
REG_WRITE_FOOTER; \
|
|
}
|
|
|
|
#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; \
|
|
REG_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); \
|
|
} \
|
|
REG_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; \
|
|
REG_WRITE_HEADER; \
|
|
if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
|
|
__fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
|
|
} \
|
|
hsw_unclaimed_reg_clear(dev_priv, reg); \
|
|
__raw_i915_write##x(dev_priv, reg, val); \
|
|
if (unlikely(__fifo_ret)) { \
|
|
gen6_gt_check_fifodbg(dev_priv); \
|
|
} \
|
|
hsw_unclaimed_reg_check(dev_priv, reg); \
|
|
REG_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) { \
|
|
REG_WRITE_HEADER; \
|
|
if (reg < 0x40000 && !is_gen8_shadowed(dev_priv, reg)) { \
|
|
if (dev_priv->uncore.forcewake_count == 0) \
|
|
dev_priv->uncore.funcs.force_wake_get(dev_priv, \
|
|
FORCEWAKE_ALL); \
|
|
__raw_i915_write##x(dev_priv, reg, val); \
|
|
if (dev_priv->uncore.forcewake_count == 0) \
|
|
dev_priv->uncore.funcs.force_wake_put(dev_priv, \
|
|
FORCEWAKE_ALL); \
|
|
} else { \
|
|
__raw_i915_write##x(dev_priv, reg, val); \
|
|
} \
|
|
REG_WRITE_FOOTER; \
|
|
}
|
|
|
|
__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)
|
|
__gen5_write(8)
|
|
__gen5_write(16)
|
|
__gen5_write(32)
|
|
__gen5_write(64)
|
|
__gen4_write(8)
|
|
__gen4_write(16)
|
|
__gen4_write(32)
|
|
__gen4_write(64)
|
|
|
|
#undef __gen8_write
|
|
#undef __hsw_write
|
|
#undef __gen6_write
|
|
#undef __gen5_write
|
|
#undef __gen4_write
|
|
#undef REG_WRITE_FOOTER
|
|
#undef REG_WRITE_HEADER
|
|
|
|
void intel_uncore_init(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
|
|
setup_timer(&dev_priv->uncore.force_wake_timer,
|
|
gen6_force_wake_timer, (unsigned long)dev_priv);
|
|
|
|
intel_uncore_early_sanitize(dev);
|
|
|
|
if (IS_VALLEYVIEW(dev)) {
|
|
dev_priv->uncore.funcs.force_wake_get = __vlv_force_wake_get;
|
|
dev_priv->uncore.funcs.force_wake_put = __vlv_force_wake_put;
|
|
} else if (IS_HASWELL(dev) || IS_GEN8(dev)) {
|
|
dev_priv->uncore.funcs.force_wake_get = __gen7_gt_force_wake_mt_get;
|
|
dev_priv->uncore.funcs.force_wake_put = __gen7_gt_force_wake_mt_put;
|
|
} 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.
|
|
*/
|
|
mutex_lock(&dev->struct_mutex);
|
|
__gen7_gt_force_wake_mt_get(dev_priv, FORCEWAKE_ALL);
|
|
ecobus = __raw_i915_read32(dev_priv, ECOBUS);
|
|
__gen7_gt_force_wake_mt_put(dev_priv, FORCEWAKE_ALL);
|
|
mutex_unlock(&dev->struct_mutex);
|
|
|
|
if (ecobus & FORCEWAKE_MT_ENABLE) {
|
|
dev_priv->uncore.funcs.force_wake_get =
|
|
__gen7_gt_force_wake_mt_get;
|
|
dev_priv->uncore.funcs.force_wake_put =
|
|
__gen7_gt_force_wake_mt_put;
|
|
} else {
|
|
DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n");
|
|
DRM_INFO("when using vblank-synced partial screen updates.\n");
|
|
dev_priv->uncore.funcs.force_wake_get =
|
|
__gen6_gt_force_wake_get;
|
|
dev_priv->uncore.funcs.force_wake_put =
|
|
__gen6_gt_force_wake_put;
|
|
}
|
|
} else if (IS_GEN6(dev)) {
|
|
dev_priv->uncore.funcs.force_wake_get =
|
|
__gen6_gt_force_wake_get;
|
|
dev_priv->uncore.funcs.force_wake_put =
|
|
__gen6_gt_force_wake_put;
|
|
}
|
|
|
|
switch (INTEL_INFO(dev)->gen) {
|
|
default:
|
|
dev_priv->uncore.funcs.mmio_writeb = gen8_write8;
|
|
dev_priv->uncore.funcs.mmio_writew = gen8_write16;
|
|
dev_priv->uncore.funcs.mmio_writel = gen8_write32;
|
|
dev_priv->uncore.funcs.mmio_writeq = gen8_write64;
|
|
dev_priv->uncore.funcs.mmio_readb = gen6_read8;
|
|
dev_priv->uncore.funcs.mmio_readw = gen6_read16;
|
|
dev_priv->uncore.funcs.mmio_readl = gen6_read32;
|
|
dev_priv->uncore.funcs.mmio_readq = gen6_read64;
|
|
break;
|
|
case 7:
|
|
case 6:
|
|
if (IS_HASWELL(dev)) {
|
|
dev_priv->uncore.funcs.mmio_writeb = hsw_write8;
|
|
dev_priv->uncore.funcs.mmio_writew = hsw_write16;
|
|
dev_priv->uncore.funcs.mmio_writel = hsw_write32;
|
|
dev_priv->uncore.funcs.mmio_writeq = hsw_write64;
|
|
} else {
|
|
dev_priv->uncore.funcs.mmio_writeb = gen6_write8;
|
|
dev_priv->uncore.funcs.mmio_writew = gen6_write16;
|
|
dev_priv->uncore.funcs.mmio_writel = gen6_write32;
|
|
dev_priv->uncore.funcs.mmio_writeq = gen6_write64;
|
|
}
|
|
|
|
if (IS_VALLEYVIEW(dev)) {
|
|
dev_priv->uncore.funcs.mmio_readb = vlv_read8;
|
|
dev_priv->uncore.funcs.mmio_readw = vlv_read16;
|
|
dev_priv->uncore.funcs.mmio_readl = vlv_read32;
|
|
dev_priv->uncore.funcs.mmio_readq = vlv_read64;
|
|
} else {
|
|
dev_priv->uncore.funcs.mmio_readb = gen6_read8;
|
|
dev_priv->uncore.funcs.mmio_readw = gen6_read16;
|
|
dev_priv->uncore.funcs.mmio_readl = gen6_read32;
|
|
dev_priv->uncore.funcs.mmio_readq = gen6_read64;
|
|
}
|
|
break;
|
|
case 5:
|
|
dev_priv->uncore.funcs.mmio_writeb = gen5_write8;
|
|
dev_priv->uncore.funcs.mmio_writew = gen5_write16;
|
|
dev_priv->uncore.funcs.mmio_writel = gen5_write32;
|
|
dev_priv->uncore.funcs.mmio_writeq = gen5_write64;
|
|
dev_priv->uncore.funcs.mmio_readb = gen5_read8;
|
|
dev_priv->uncore.funcs.mmio_readw = gen5_read16;
|
|
dev_priv->uncore.funcs.mmio_readl = gen5_read32;
|
|
dev_priv->uncore.funcs.mmio_readq = gen5_read64;
|
|
break;
|
|
case 4:
|
|
case 3:
|
|
case 2:
|
|
dev_priv->uncore.funcs.mmio_writeb = gen4_write8;
|
|
dev_priv->uncore.funcs.mmio_writew = gen4_write16;
|
|
dev_priv->uncore.funcs.mmio_writel = gen4_write32;
|
|
dev_priv->uncore.funcs.mmio_writeq = gen4_write64;
|
|
dev_priv->uncore.funcs.mmio_readb = gen4_read8;
|
|
dev_priv->uncore.funcs.mmio_readw = gen4_read16;
|
|
dev_priv->uncore.funcs.mmio_readl = gen4_read32;
|
|
dev_priv->uncore.funcs.mmio_readq = gen4_read64;
|
|
break;
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static const struct register_whitelist {
|
|
uint64_t offset;
|
|
uint32_t size;
|
|
uint32_t gen_bitmask; /* support gens, 0x10 for 4, 0x30 for 4 and 5, etc. */
|
|
} whitelist[] = {
|
|
{ RING_TIMESTAMP(RENDER_RING_BASE), 8, 0x1F0 },
|
|
};
|
|
|
|
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;
|
|
|
|
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;
|
|
|
|
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:
|
|
WARN_ON(1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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 i915_hw_context *ctx;
|
|
int ret;
|
|
|
|
if (args->flags || args->pad)
|
|
return -EINVAL;
|
|
|
|
if (args->ctx_id == DEFAULT_CONTEXT_ID && !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 i965_reset_complete(struct drm_device *dev)
|
|
{
|
|
u8 gdrst;
|
|
pci_read_config_byte(dev->pdev, I965_GDRST, &gdrst);
|
|
return (gdrst & GRDOM_RESET_ENABLE) == 0;
|
|
}
|
|
|
|
static int i965_do_reset(struct drm_device *dev)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* Set the domains we want to reset (GRDOM/bits 2 and 3) as
|
|
* well as the reset bit (GR/bit 0). Setting the GR bit
|
|
* triggers the reset; when done, the hardware will clear it.
|
|
*/
|
|
pci_write_config_byte(dev->pdev, I965_GDRST,
|
|
GRDOM_RENDER | GRDOM_RESET_ENABLE);
|
|
ret = wait_for(i965_reset_complete(dev), 500);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* We can't reset render&media without also resetting display ... */
|
|
pci_write_config_byte(dev->pdev, I965_GDRST,
|
|
GRDOM_MEDIA | GRDOM_RESET_ENABLE);
|
|
|
|
ret = wait_for(i965_reset_complete(dev), 500);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pci_write_config_byte(dev->pdev, I965_GDRST, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ironlake_do_reset(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 gdrst;
|
|
int ret;
|
|
|
|
gdrst = I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR);
|
|
gdrst &= ~GRDOM_MASK;
|
|
I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
|
|
gdrst | GRDOM_RENDER | GRDOM_RESET_ENABLE);
|
|
ret = wait_for(I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) & 0x1, 500);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* We can't reset render&media without also resetting display ... */
|
|
gdrst = I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR);
|
|
gdrst &= ~GRDOM_MASK;
|
|
I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
|
|
gdrst | GRDOM_MEDIA | GRDOM_RESET_ENABLE);
|
|
return wait_for(I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) & 0x1, 500);
|
|
}
|
|
|
|
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)
|
|
{
|
|
switch (INTEL_INFO(dev)->gen) {
|
|
case 8:
|
|
case 7:
|
|
case 6: return gen6_do_reset(dev);
|
|
case 5: return ironlake_do_reset(dev);
|
|
case 4: return i965_do_reset(dev);
|
|
default: 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);
|
|
}
|
|
}
|