Currently, the register access code is split between i915_drv.c and
intel_pm.c. It only bares a superficial resemblance to the reset of the
powermanagement code, so move it all into its own file. This is to ease
further patches to enforce serialised register access.
v2: Scan for random abuse of I915_WRITE_NOTRACE
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/i915_dma.c | 6 +-
drivers/gpu/drm/i915/i915_drv.c | 264 ----------------
drivers/gpu/drm/i915/i915_drv.h | 6 +-
drivers/gpu/drm/i915/i915_irq.c | 6 +-
drivers/gpu/drm/i915/intel_display.c | 3 +-
drivers/gpu/drm/i915/intel_drv.h | 1 -
drivers/gpu/drm/i915/intel_gt.c | 566 +++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_pm.c | 258 +---------------
9 files changed, 584 insertions(+), 527 deletions(-)
create mode 100644 drivers/gpu/drm/i915/intel_gt.c
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 40034ec..f1c5845 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -28,6 +28,7 @@ i915-y := i915_drv.o i915_dma.o i915_irq.o \
intel_modes.o \
intel_panel.o \
intel_pm.o \
+ intel_gt.o \
intel_i2c.o \
intel_fb.o \
intel_tv.o \
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 6ce9033..1eb4c96 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1445,10 +1445,7 @@ static void i915_dump_device_info(struct drm_i915_private *dev_priv)
*/
static void intel_early_sanitize_regs(struct drm_device *dev)
{
- struct drm_i915_private *dev_priv = dev->dev_private;
-
- if (HAS_FPGA_DBG_UNCLAIMED(dev))
- I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
+ intel_gt_early_sanitize(dev);
}
/**
@@ -1581,6 +1578,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
intel_irq_init(dev);
intel_gt_init(dev);
+ intel_pm_init(dev);
/* Try to make sure MCHBAR is enabled before poking at it */
intel_setup_mchbar(dev);
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index b07362f..0698413 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -761,140 +761,6 @@ int i915_resume(struct drm_device *dev)
return 0;
}
-static int i8xx_do_reset(struct drm_device *dev)
-{
- struct drm_i915_private *dev_priv = dev->dev_private;
-
- if (IS_I85X(dev))
- return -ENODEV;
-
- I915_WRITE(D_STATE, I915_READ(D_STATE) | DSTATE_GFX_RESET_I830);
- POSTING_READ(D_STATE);
-
- if (IS_I830(dev) || IS_845G(dev)) {
- I915_WRITE(DEBUG_RESET_I830,
- DEBUG_RESET_DISPLAY |
- DEBUG_RESET_RENDER |
- DEBUG_RESET_FULL);
- POSTING_READ(DEBUG_RESET_I830);
- msleep(1);
-
- I915_WRITE(DEBUG_RESET_I830, 0);
- POSTING_READ(DEBUG_RESET_I830);
- }
-
- msleep(1);
-
- I915_WRITE(D_STATE, I915_READ(D_STATE) & ~DSTATE_GFX_RESET_I830);
- POSTING_READ(D_STATE);
-
- 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;
- unsigned long irqflags;
-
- /* Hold gt_lock across reset to prevent any register access
- * with forcewake not set correctly
- */
- spin_lock_irqsave(&dev_priv->gt_lock, irqflags);
-
- /* 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
- */
- I915_WRITE_NOTRACE(GEN6_GDRST, GEN6_GRDOM_FULL);
-
- /* Spin waiting for the device to ack the reset request */
- ret = wait_for((I915_READ_NOTRACE(GEN6_GDRST) & GEN6_GRDOM_FULL) == 0, 500);
-
- /* If reset with a user forcewake, try to restore, otherwise turn it off */
- if (dev_priv->forcewake_count)
- dev_priv->gt.force_wake_get(dev_priv);
- else
- dev_priv->gt.force_wake_put(dev_priv);
-
- /* Restore fifo count */
- dev_priv->gt_fifo_count = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
-
- spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags);
- return ret;
-}
-
-int intel_gpu_reset(struct drm_device *dev)
-{
- switch (INTEL_INFO(dev)->gen) {
- case 7:
- case 6: return gen6_do_reset(dev);
- case 5: return ironlake_do_reset(dev);
- case 4: return i965_do_reset(dev);
- case 2: return i8xx_do_reset(dev);
- default: return -ENODEV;
- }
-}
-
/**
* i915_reset - reset chip after a hang
* @dev: drm device to reset
@@ -1224,133 +1090,3 @@ module_exit(i915_exit);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL and additional rights");
-
-/* We give fast paths for the really cool registers */
-#define NEEDS_FORCE_WAKE(dev_priv, reg) \
- ((HAS_FORCE_WAKE((dev_priv)->dev)) && \
- ((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. */
- I915_WRITE_NOTRACE(MI_MODE, 0);
-}
-
-static void
-hsw_unclaimed_reg_clear(struct drm_i915_private *dev_priv, u32 reg)
-{
- if (HAS_FPGA_DBG_UNCLAIMED(dev_priv->dev) &&
- (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
- DRM_ERROR("Unknown unclaimed register before writing to %x\n",
- reg);
- I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
- }
-}
-
-static void
-hsw_unclaimed_reg_check(struct drm_i915_private *dev_priv, u32 reg)
-{
- if (HAS_FPGA_DBG_UNCLAIMED(dev_priv->dev) &&
- (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
- DRM_ERROR("Unclaimed write to %x\n", reg);
- I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
- }
-}
-
-#define __i915_read(x, y) \
-u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \
- u##x val = 0; \
- if (IS_GEN5(dev_priv->dev)) \
- ilk_dummy_write(dev_priv); \
- if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
- unsigned long irqflags; \
- spin_lock_irqsave(&dev_priv->gt_lock, irqflags); \
- if (dev_priv->forcewake_count == 0) \
- dev_priv->gt.force_wake_get(dev_priv); \
- val = read##y(dev_priv->regs + reg); \
- if (dev_priv->forcewake_count == 0) \
- dev_priv->gt.force_wake_put(dev_priv); \
- spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); \
- } else { \
- val = read##y(dev_priv->regs + reg); \
- } \
- trace_i915_reg_rw(false, reg, val, sizeof(val)); \
- return val; \
-}
-
-__i915_read(8, b)
-__i915_read(16, w)
-__i915_read(32, l)
-__i915_read(64, q)
-#undef __i915_read
-
-#define __i915_write(x, y) \
-void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \
- u32 __fifo_ret = 0; \
- trace_i915_reg_rw(true, reg, val, sizeof(val)); \
- if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
- __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
- } \
- if (IS_GEN5(dev_priv->dev)) \
- ilk_dummy_write(dev_priv); \
- hsw_unclaimed_reg_clear(dev_priv, reg); \
- write##y(val, dev_priv->regs + reg); \
- if (unlikely(__fifo_ret)) { \
- gen6_gt_check_fifodbg(dev_priv); \
- } \
- hsw_unclaimed_reg_check(dev_priv, reg); \
-}
-__i915_write(8, b)
-__i915_write(16, w)
-__i915_write(32, l)
-__i915_write(64, q)
-#undef __i915_write
-
-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, 0xF0 },
-};
-
-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;
-}
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 842aada..1715d3f 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1624,8 +1624,13 @@ void i915_handle_error(struct drm_device *dev, bool wedged);
extern void intel_irq_init(struct drm_device *dev);
extern void intel_hpd_init(struct drm_device *dev);
+extern void intel_pm_init(struct drm_device *dev);
+
+extern void intel_gt_early_sanitize(struct drm_device *dev);
extern void intel_gt_init(struct drm_device *dev);
extern void intel_gt_reset(struct drm_device *dev);
+extern void intel_gt_clear_errors(struct drm_device *dev);
+extern void intel_gt_check_errors(struct drm_device *dev);
void i915_error_state_free(struct kref *error_ref);
@@ -2062,7 +2067,6 @@ extern void intel_display_print_error_state(struct drm_i915_error_state_buf *e,
*/
void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv);
void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv);
-int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv);
int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val);
int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val);
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index cf1a21a..8073d80 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1214,11 +1214,7 @@ static irqreturn_t ivybridge_irq_handler(int irq, void *arg)
/* We get interrupts on unclaimed registers, so check for this before we
* do any I915_{READ,WRITE}. */
- if (IS_HASWELL(dev) &&
- (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
- DRM_ERROR("Unclaimed register before interrupt\n");
- I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
- }
+ intel_gt_check_errors(dev);
/* disable master interrupt before clearing iir */
de_ier = I915_READ(DEIER);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 10a3629..5f6767a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -10267,8 +10267,7 @@ intel_display_capture_error_state(struct drm_device *dev)
* well was on, so here we have to clear the FPGA_DBG_RM_NOCLAIM bit to
* prevent the next I915_WRITE from detecting it and printing an error
* message. */
- if (HAS_POWER_WELL(dev))
- I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
+ intel_gt_clear_errors(dev);
return error;
}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 5dfc1a0..f705ef3 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -804,7 +804,6 @@ extern void intel_init_power_well(struct drm_device *dev);
extern void intel_set_power_well(struct drm_device *dev, bool enable);
extern void intel_enable_gt_powersave(struct drm_device *dev);
extern void intel_disable_gt_powersave(struct drm_device *dev);
-extern void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv);
extern void ironlake_teardown_rc6(struct drm_device *dev);
extern bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
diff --git a/drivers/gpu/drm/i915/intel_gt.c b/drivers/gpu/drm/i915/intel_gt.c
new file mode 100644
index 0000000..8046d05
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_gt.c
@@ -0,0 +1,566 @@
+/*
+ * 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"
+
+#define FORCEWAKE_ACK_TIMEOUT_MS 2
+
+static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
+{
+ u32 gt_thread_status_mask;
+
+ if (IS_HASWELL(dev_priv->dev))
+ gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK_HSW;
+ else
+ gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK;
+
+ /* w/a for a sporadic read returning 0 by waiting for the GT
+ * thread to wake up.
+ */
+ if (wait_for_atomic_us((I915_READ_NOTRACE(GEN6_GT_THREAD_STATUS_REG) & gt_thread_status_mask) == 0, 500))
+ DRM_ERROR("GT thread status wait timed out\n");
+}
+
+static void __gen6_gt_force_wake_reset(struct drm_i915_private *dev_priv)
+{
+ I915_WRITE_NOTRACE(FORCEWAKE, 0);
+ POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */
+}
+
+static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
+{
+ if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK) & 1) == 0,
+ FORCEWAKE_ACK_TIMEOUT_MS))
+ DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
+
+ I915_WRITE_NOTRACE(FORCEWAKE, 1);
+ POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */
+
+ if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK) & 1),
+ FORCEWAKE_ACK_TIMEOUT_MS))
+ DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
+
+ /* WaRsForcewakeWaitTC0:snb */
+ __gen6_gt_wait_for_thread_c0(dev_priv);
+}
+
+static void __gen6_gt_force_wake_mt_reset(struct drm_i915_private *dev_priv)
+{
+ I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(0xffff));
+ /* something from same cacheline, but !FORCEWAKE_MT */
+ POSTING_READ(ECOBUS);
+}
+
+static void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv)
+{
+ u32 forcewake_ack;
+
+ if (IS_HASWELL(dev_priv->dev))
+ forcewake_ack = FORCEWAKE_ACK_HSW;
+ else
+ forcewake_ack = FORCEWAKE_MT_ACK;
+
+ if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & FORCEWAKE_KERNEL) == 0,
+ FORCEWAKE_ACK_TIMEOUT_MS))
+ DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
+
+ I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
+ /* something from same cacheline, but !FORCEWAKE_MT */
+ POSTING_READ(ECOBUS);
+
+ if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & FORCEWAKE_KERNEL),
+ FORCEWAKE_ACK_TIMEOUT_MS))
+ DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
+
+ /* WaRsForcewakeWaitTC0:ivb,hsw */
+ __gen6_gt_wait_for_thread_c0(dev_priv);
+}
+
+static void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
+{
+ u32 gtfifodbg;
+ gtfifodbg = I915_READ_NOTRACE(GTFIFODBG);
+ if (WARN(gtfifodbg & GT_FIFO_CPU_ERROR_MASK,
+ "MMIO read or write has been dropped %x\n", gtfifodbg))
+ I915_WRITE_NOTRACE(GTFIFODBG, GT_FIFO_CPU_ERROR_MASK);
+}
+
+static void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)
+{
+ I915_WRITE_NOTRACE(FORCEWAKE, 0);
+ /* something from same cacheline, but !FORCEWAKE */
+ POSTING_READ(ECOBUS);
+ gen6_gt_check_fifodbg(dev_priv);
+}
+
+static void __gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv)
+{
+ I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
+ /* something from same cacheline, but !FORCEWAKE_MT */
+ POSTING_READ(ECOBUS);
+ gen6_gt_check_fifodbg(dev_priv);
+}
+
+static int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
+{
+ int ret = 0;
+
+ if (dev_priv->gt_fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) {
+ int loop = 500;
+ u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
+ while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
+ udelay(10);
+ fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
+ }
+ if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES))
+ ++ret;
+ dev_priv->gt_fifo_count = fifo;
+ }
+ dev_priv->gt_fifo_count--;
+
+ return ret;
+}
+
+static void vlv_force_wake_reset(struct drm_i915_private *dev_priv)
+{
+ I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(0xffff));
+ /* something from same cacheline, but !FORCEWAKE_VLV */
+ POSTING_READ(FORCEWAKE_ACK_VLV);
+}
+
+static void vlv_force_wake_get(struct drm_i915_private *dev_priv)
+{
+ if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & FORCEWAKE_KERNEL) == 0,
+ FORCEWAKE_ACK_TIMEOUT_MS))
+ DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
+
+ I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
+ I915_WRITE_NOTRACE(FORCEWAKE_MEDIA_VLV,
+ _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
+
+ if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & FORCEWAKE_KERNEL),
+ FORCEWAKE_ACK_TIMEOUT_MS))
+ DRM_ERROR("Timed out waiting for GT to ack forcewake request.\n");
+
+ if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_MEDIA_VLV) &
+ FORCEWAKE_KERNEL),
+ FORCEWAKE_ACK_TIMEOUT_MS))
+ DRM_ERROR("Timed out waiting for media to ack forcewake request.\n");
+
+ /* WaRsForcewakeWaitTC0:vlv */
+ __gen6_gt_wait_for_thread_c0(dev_priv);
+}
+
+static void vlv_force_wake_put(struct drm_i915_private *dev_priv)
+{
+ I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
+ I915_WRITE_NOTRACE(FORCEWAKE_MEDIA_VLV,
+ _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
+ /* The below doubles as a POSTING_READ */
+ gen6_gt_check_fifodbg(dev_priv);
+}
+
+void intel_gt_early_sanitize(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ if (HAS_FPGA_DBG_UNCLAIMED(dev))
+ I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
+}
+
+void intel_gt_init(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ spin_lock_init(&dev_priv->gt_lock);
+
+ intel_gt_reset(dev);
+
+ if (IS_VALLEYVIEW(dev)) {
+ dev_priv->gt.force_wake_get = vlv_force_wake_get;
+ dev_priv->gt.force_wake_put = vlv_force_wake_put;
+ } else if (IS_HASWELL(dev)) {
+ dev_priv->gt.force_wake_get = __gen6_gt_force_wake_mt_get;
+ dev_priv->gt.force_wake_put = __gen6_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);
+ __gen6_gt_force_wake_mt_get(dev_priv);
+ ecobus = I915_READ_NOTRACE(ECOBUS);
+ __gen6_gt_force_wake_mt_put(dev_priv);
+ mutex_unlock(&dev->struct_mutex);
+
+ if (ecobus & FORCEWAKE_MT_ENABLE) {
+ dev_priv->gt.force_wake_get =
+ __gen6_gt_force_wake_mt_get;
+ dev_priv->gt.force_wake_put =
+ __gen6_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->gt.force_wake_get = __gen6_gt_force_wake_get;
+ dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put;
+ }
+ } else if (IS_GEN6(dev)) {
+ dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get;
+ dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put;
+ }
+}
+
+void intel_gt_reset(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ if (IS_VALLEYVIEW(dev)) {
+ vlv_force_wake_reset(dev_priv);
+ } else if (INTEL_INFO(dev)->gen >= 6) {
+ __gen6_gt_force_wake_reset(dev_priv);
+ if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
+ __gen6_gt_force_wake_mt_reset(dev_priv);
+ }
+}
+
+
+/*
+ * Generally this is called implicitly by the register read function. However,
+ * if some sequence requires the GT to not power down then this function should
+ * be called at the beginning of the sequence followed by a call to
+ * gen6_gt_force_wake_put() at the end of the sequence.
+ */
+void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
+{
+ unsigned long irqflags;
+
+ spin_lock_irqsave(&dev_priv->gt_lock, irqflags);
+ if (dev_priv->forcewake_count++ == 0)
+ dev_priv->gt.force_wake_get(dev_priv);
+ spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags);
+}
+
+/*
+ * see gen6_gt_force_wake_get()
+ */
+void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)
+{
+ unsigned long irqflags;
+
+ spin_lock_irqsave(&dev_priv->gt_lock, irqflags);
+ if (--dev_priv->forcewake_count == 0)
+ dev_priv->gt.force_wake_put(dev_priv);
+ spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags);
+}
+
+/* We give fast paths for the really cool registers */
+#define NEEDS_FORCE_WAKE(dev_priv, reg) \
+ ((HAS_FORCE_WAKE((dev_priv)->dev)) && \
+ ((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. */
+ I915_WRITE_NOTRACE(MI_MODE, 0);
+}
+
+static void
+hsw_unclaimed_reg_clear(struct drm_i915_private *dev_priv, u32 reg)
+{
+ if (HAS_FPGA_DBG_UNCLAIMED(dev_priv->dev) &&
+ (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
+ DRM_ERROR("Unknown unclaimed register before writing to %x\n",
+ reg);
+ I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
+ }
+}
+
+static void
+hsw_unclaimed_reg_check(struct drm_i915_private *dev_priv, u32 reg)
+{
+ if (HAS_FPGA_DBG_UNCLAIMED(dev_priv->dev) &&
+ (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
+ DRM_ERROR("Unclaimed write to %x\n", reg);
+ I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
+ }
+}
+
+#define __i915_read(x, y) \
+u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \
+ u##x val = 0; \
+ if (IS_GEN5(dev_priv->dev)) \
+ ilk_dummy_write(dev_priv); \
+ if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
+ unsigned long irqflags; \
+ spin_lock_irqsave(&dev_priv->gt_lock, irqflags); \
+ if (dev_priv->forcewake_count == 0) \
+ dev_priv->gt.force_wake_get(dev_priv); \
+ val = read##y(dev_priv->regs + reg); \
+ if (dev_priv->forcewake_count == 0) \
+ dev_priv->gt.force_wake_put(dev_priv); \
+ spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); \
+ } else { \
+ val = read##y(dev_priv->regs + reg); \
+ } \
+ trace_i915_reg_rw(false, reg, val, sizeof(val)); \
+ return val; \
+}
+
+__i915_read(8, b)
+__i915_read(16, w)
+__i915_read(32, l)
+__i915_read(64, q)
+#undef __i915_read
+
+#define __i915_write(x, y) \
+void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \
+ u32 __fifo_ret = 0; \
+ trace_i915_reg_rw(true, reg, val, sizeof(val)); \
+ if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
+ __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
+ } \
+ if (IS_GEN5(dev_priv->dev)) \
+ ilk_dummy_write(dev_priv); \
+ hsw_unclaimed_reg_clear(dev_priv, reg); \
+ write##y(val, dev_priv->regs + reg); \
+ if (unlikely(__fifo_ret)) { \
+ gen6_gt_check_fifodbg(dev_priv); \
+ } \
+ hsw_unclaimed_reg_check(dev_priv, reg); \
+}
+__i915_write(8, b)
+__i915_write(16, w)
+__i915_write(32, l)
+__i915_write(64, q)
+#undef __i915_write
+
+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, 0xF0 },
+};
+
+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;
+}
+
+static int i8xx_do_reset(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ if (IS_I85X(dev))
+ return -ENODEV;
+
+ I915_WRITE(D_STATE, I915_READ(D_STATE) | DSTATE_GFX_RESET_I830);
+ POSTING_READ(D_STATE);
+
+ if (IS_I830(dev) || IS_845G(dev)) {
+ I915_WRITE(DEBUG_RESET_I830,
+ DEBUG_RESET_DISPLAY |
+ DEBUG_RESET_RENDER |
+ DEBUG_RESET_FULL);
+ POSTING_READ(DEBUG_RESET_I830);
+ msleep(1);
+
+ I915_WRITE(DEBUG_RESET_I830, 0);
+ POSTING_READ(DEBUG_RESET_I830);
+ }
+
+ msleep(1);
+
+ I915_WRITE(D_STATE, I915_READ(D_STATE) & ~DSTATE_GFX_RESET_I830);
+ POSTING_READ(D_STATE);
+
+ 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;
+ unsigned long irqflags;
+
+ /* Hold gt_lock across reset to prevent any register access
+ * with forcewake not set correctly
+ */
+ spin_lock_irqsave(&dev_priv->gt_lock, irqflags);
+
+ /* 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
+ */
+ I915_WRITE_NOTRACE(GEN6_GDRST, GEN6_GRDOM_FULL);
+
+ /* Spin waiting for the device to ack the reset request */
+ ret = wait_for((I915_READ_NOTRACE(GEN6_GDRST) & GEN6_GRDOM_FULL) == 0, 500);
+
+ /* If reset with a user forcewake, try to restore, otherwise turn it off */
+ if (dev_priv->forcewake_count)
+ dev_priv->gt.force_wake_get(dev_priv);
+ else
+ dev_priv->gt.force_wake_put(dev_priv);
+
+ /* Restore fifo count */
+ dev_priv->gt_fifo_count = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
+
+ spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags);
+ return ret;
+}
+
+int intel_gpu_reset(struct drm_device *dev)
+{
+ switch (INTEL_INFO(dev)->gen) {
+ case 7:
+ case 6: return gen6_do_reset(dev);
+ case 5: return ironlake_do_reset(dev);
+ case 4: return i965_do_reset(dev);
+ case 2: return i8xx_do_reset(dev);
+ default: return -ENODEV;
+ }
+}
+
+void intel_gt_clear_errors(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ if (HAS_FPGA_DBG_UNCLAIMED(dev))
+ I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
+}
+
+void intel_gt_check_errors(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ if (HAS_FPGA_DBG_UNCLAIMED(dev) &&
+ (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
+ DRM_ERROR("Unclaimed register before interrupt\n");
+ I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
+ }
+}
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index fb4afaa..f6c3608 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -32,8 +32,6 @@
#include <linux/module.h>
#include <drm/i915_powerwell.h>
-#define FORCEWAKE_ACK_TIMEOUT_MS 2
-
/* FBC, or Frame Buffer Compression, is a technique employed to compress the
* framebuffer contents in-memory, aiming at reducing the required bandwidth
* during in-memory transfers and, therefore, reduce the power packet.
@@ -5284,254 +5282,6 @@ void intel_init_pm(struct drm_device *dev)
}
}
-static void __gen6_gt_wait_for_thread_c0(struct drm_i915_private *dev_priv)
-{
- u32 gt_thread_status_mask;
-
- if (IS_HASWELL(dev_priv->dev))
- gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK_HSW;
- else
- gt_thread_status_mask = GEN6_GT_THREAD_STATUS_CORE_MASK;
-
- /* w/a for a sporadic read returning 0 by waiting for the GT
- * thread to wake up.
- */
- if (wait_for_atomic_us((I915_READ_NOTRACE(GEN6_GT_THREAD_STATUS_REG) & gt_thread_status_mask) == 0, 500))
- DRM_ERROR("GT thread status wait timed out\n");
-}
-
-static void __gen6_gt_force_wake_reset(struct drm_i915_private *dev_priv)
-{
- I915_WRITE_NOTRACE(FORCEWAKE, 0);
- POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */
-}
-
-static void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
-{
- if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK) & 1) == 0,
- FORCEWAKE_ACK_TIMEOUT_MS))
- DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
-
- I915_WRITE_NOTRACE(FORCEWAKE, 1);
- POSTING_READ(ECOBUS); /* something from same cacheline, but !FORCEWAKE */
-
- if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK) & 1),
- FORCEWAKE_ACK_TIMEOUT_MS))
- DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
-
- /* WaRsForcewakeWaitTC0:snb */
- __gen6_gt_wait_for_thread_c0(dev_priv);
-}
-
-static void __gen6_gt_force_wake_mt_reset(struct drm_i915_private *dev_priv)
-{
- I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(0xffff));
- /* something from same cacheline, but !FORCEWAKE_MT */
- POSTING_READ(ECOBUS);
-}
-
-static void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv)
-{
- u32 forcewake_ack;
-
- if (IS_HASWELL(dev_priv->dev))
- forcewake_ack = FORCEWAKE_ACK_HSW;
- else
- forcewake_ack = FORCEWAKE_MT_ACK;
-
- if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & FORCEWAKE_KERNEL) == 0,
- FORCEWAKE_ACK_TIMEOUT_MS))
- DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
-
- I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
- /* something from same cacheline, but !FORCEWAKE_MT */
- POSTING_READ(ECOBUS);
-
- if (wait_for_atomic((I915_READ_NOTRACE(forcewake_ack) & FORCEWAKE_KERNEL),
- FORCEWAKE_ACK_TIMEOUT_MS))
- DRM_ERROR("Timed out waiting for forcewake to ack request.\n");
-
- /* WaRsForcewakeWaitTC0:ivb,hsw */
- __gen6_gt_wait_for_thread_c0(dev_priv);
-}
-
-/*
- * Generally this is called implicitly by the register read function. However,
- * if some sequence requires the GT to not power down then this function should
- * be called at the beginning of the sequence followed by a call to
- * gen6_gt_force_wake_put() at the end of the sequence.
- */
-void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv)
-{
- unsigned long irqflags;
-
- spin_lock_irqsave(&dev_priv->gt_lock, irqflags);
- if (dev_priv->forcewake_count++ == 0)
- dev_priv->gt.force_wake_get(dev_priv);
- spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags);
-}
-
-void gen6_gt_check_fifodbg(struct drm_i915_private *dev_priv)
-{
- u32 gtfifodbg;
- gtfifodbg = I915_READ_NOTRACE(GTFIFODBG);
- if (WARN(gtfifodbg & GT_FIFO_CPU_ERROR_MASK,
- "MMIO read or write has been dropped %x\n", gtfifodbg))
- I915_WRITE_NOTRACE(GTFIFODBG, GT_FIFO_CPU_ERROR_MASK);
-}
-
-static void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)
-{
- I915_WRITE_NOTRACE(FORCEWAKE, 0);
- /* something from same cacheline, but !FORCEWAKE */
- POSTING_READ(ECOBUS);
- gen6_gt_check_fifodbg(dev_priv);
-}
-
-static void __gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv)
-{
- I915_WRITE_NOTRACE(FORCEWAKE_MT, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
- /* something from same cacheline, but !FORCEWAKE_MT */
- POSTING_READ(ECOBUS);
- gen6_gt_check_fifodbg(dev_priv);
-}
-
-/*
- * see gen6_gt_force_wake_get()
- */
-void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv)
-{
- unsigned long irqflags;
-
- spin_lock_irqsave(&dev_priv->gt_lock, irqflags);
- if (--dev_priv->forcewake_count == 0)
- dev_priv->gt.force_wake_put(dev_priv);
- spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags);
-}
-
-int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv)
-{
- int ret = 0;
-
- if (dev_priv->gt_fifo_count < GT_FIFO_NUM_RESERVED_ENTRIES) {
- int loop = 500;
- u32 fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
- while (fifo <= GT_FIFO_NUM_RESERVED_ENTRIES && loop--) {
- udelay(10);
- fifo = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
- }
- if (WARN_ON(loop < 0 && fifo <= GT_FIFO_NUM_RESERVED_ENTRIES))
- ++ret;
- dev_priv->gt_fifo_count = fifo;
- }
- dev_priv->gt_fifo_count--;
-
- return ret;
-}
-
-static void vlv_force_wake_reset(struct drm_i915_private *dev_priv)
-{
- I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(0xffff));
- /* something from same cacheline, but !FORCEWAKE_VLV */
- POSTING_READ(FORCEWAKE_ACK_VLV);
-}
-
-static void vlv_force_wake_get(struct drm_i915_private *dev_priv)
-{
- if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & FORCEWAKE_KERNEL) == 0,
- FORCEWAKE_ACK_TIMEOUT_MS))
- DRM_ERROR("Timed out waiting for forcewake old ack to clear.\n");
-
- I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
- I915_WRITE_NOTRACE(FORCEWAKE_MEDIA_VLV,
- _MASKED_BIT_ENABLE(FORCEWAKE_KERNEL));
-
- if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_VLV) & FORCEWAKE_KERNEL),
- FORCEWAKE_ACK_TIMEOUT_MS))
- DRM_ERROR("Timed out waiting for GT to ack forcewake request.\n");
-
- if (wait_for_atomic((I915_READ_NOTRACE(FORCEWAKE_ACK_MEDIA_VLV) &
- FORCEWAKE_KERNEL),
- FORCEWAKE_ACK_TIMEOUT_MS))
- DRM_ERROR("Timed out waiting for media to ack forcewake request.\n");
-
- /* WaRsForcewakeWaitTC0:vlv */
- __gen6_gt_wait_for_thread_c0(dev_priv);
-}
-
-static void vlv_force_wake_put(struct drm_i915_private *dev_priv)
-{
- I915_WRITE_NOTRACE(FORCEWAKE_VLV, _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
- I915_WRITE_NOTRACE(FORCEWAKE_MEDIA_VLV,
- _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
- /* The below doubles as a POSTING_READ */
- gen6_gt_check_fifodbg(dev_priv);
-}
-
-void intel_gt_reset(struct drm_device *dev)
-{
- struct drm_i915_private *dev_priv = dev->dev_private;
-
- if (IS_VALLEYVIEW(dev)) {
- vlv_force_wake_reset(dev_priv);
- } else if (INTEL_INFO(dev)->gen >= 6) {
- __gen6_gt_force_wake_reset(dev_priv);
- if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
- __gen6_gt_force_wake_mt_reset(dev_priv);
- }
-}
-
-void intel_gt_init(struct drm_device *dev)
-{
- struct drm_i915_private *dev_priv = dev->dev_private;
-
- spin_lock_init(&dev_priv->gt_lock);
-
- intel_gt_reset(dev);
-
- if (IS_VALLEYVIEW(dev)) {
- dev_priv->gt.force_wake_get = vlv_force_wake_get;
- dev_priv->gt.force_wake_put = vlv_force_wake_put;
- } else if (IS_HASWELL(dev)) {
- dev_priv->gt.force_wake_get = __gen6_gt_force_wake_mt_get;
- dev_priv->gt.force_wake_put = __gen6_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);
- __gen6_gt_force_wake_mt_get(dev_priv);
- ecobus = I915_READ_NOTRACE(ECOBUS);
- __gen6_gt_force_wake_mt_put(dev_priv);
- mutex_unlock(&dev->struct_mutex);
-
- if (ecobus & FORCEWAKE_MT_ENABLE) {
- dev_priv->gt.force_wake_get =
- __gen6_gt_force_wake_mt_get;
- dev_priv->gt.force_wake_put =
- __gen6_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->gt.force_wake_get = __gen6_gt_force_wake_get;
- dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put;
- }
- } else if (IS_GEN6(dev)) {
- dev_priv->gt.force_wake_get = __gen6_gt_force_wake_get;
- dev_priv->gt.force_wake_put = __gen6_gt_force_wake_put;
- }
- INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
- intel_gen6_powersave_work);
-}
-
int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val)
{
WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
@@ -5634,3 +5384,11 @@ int vlv_freq_opcode(int ddr_freq, int val)
return val;
}
+void intel_pm_init(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
+ intel_gen6_powersave_work);
+}
+
--
1.8.3.2
