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path: root/drivers/gpu/drm/i915/intel_pm.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
-rw-r--r--drivers/gpu/drm/i915/intel_pm.c212
1 files changed, 169 insertions, 43 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 1a6e699e19e0..b8da4dcdd584 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -729,6 +729,7 @@ static unsigned int intel_wm_method2(unsigned int pixel_rate,
* intel_calculate_wm - calculate watermark level
* @pixel_rate: pixel clock
* @wm: chip FIFO params
+ * @fifo_size: size of the FIFO buffer
* @cpp: bytes per pixel
* @latency_ns: memory latency for the platform
*
@@ -2916,10 +2917,6 @@ static void intel_fixup_cur_wm_latency(struct drm_i915_private *dev_priv,
/* ILK cursor LP0 latency is 1300 ns */
if (IS_GEN5(dev_priv))
wm[0] = 13;
-
- /* WaDoubleCursorLP3Latency:ivb */
- if (IS_IVYBRIDGE(dev_priv))
- wm[3] *= 2;
}
int ilk_wm_max_level(const struct drm_i915_private *dev_priv)
@@ -3694,11 +3691,18 @@ bool intel_can_enable_sagv(struct drm_atomic_state *state)
struct intel_crtc_state *cstate;
enum pipe pipe;
int level, latency;
- int sagv_block_time_us = IS_GEN9(dev_priv) ? 30 : 20;
+ int sagv_block_time_us;
if (!intel_has_sagv(dev_priv))
return false;
+ if (IS_GEN9(dev_priv))
+ sagv_block_time_us = 30;
+ else if (IS_GEN10(dev_priv))
+ sagv_block_time_us = 20;
+ else
+ sagv_block_time_us = 10;
+
/*
* SKL+ workaround: bspec recommends we disable the SAGV when we have
* more then one pipe enabled
@@ -3778,7 +3782,8 @@ skl_ddb_get_pipe_allocation_limits(struct drm_device *dev,
ddb_size = INTEL_INFO(dev_priv)->ddb_size;
WARN_ON(ddb_size == 0);
- ddb_size -= 4; /* 4 blocks for bypass path allocation */
+ if (INTEL_GEN(dev_priv) < 11)
+ ddb_size -= 4; /* 4 blocks for bypass path allocation */
/*
* If the state doesn't change the active CRTC's, then there's
@@ -4311,7 +4316,7 @@ skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
*/
static uint_fixed_16_16_t
skl_wm_method1(const struct drm_i915_private *dev_priv, uint32_t pixel_rate,
- uint8_t cpp, uint32_t latency)
+ uint8_t cpp, uint32_t latency, uint32_t dbuf_block_size)
{
uint32_t wm_intermediate_val;
uint_fixed_16_16_t ret;
@@ -4320,7 +4325,7 @@ skl_wm_method1(const struct drm_i915_private *dev_priv, uint32_t pixel_rate,
return FP_16_16_MAX;
wm_intermediate_val = latency * pixel_rate * cpp;
- ret = div_fixed16(wm_intermediate_val, 1000 * 512);
+ ret = div_fixed16(wm_intermediate_val, 1000 * dbuf_block_size);
if (INTEL_GEN(dev_priv) >= 10)
ret = add_fixed16_u32(ret, 1);
@@ -4430,6 +4435,12 @@ skl_compute_plane_wm_params(const struct drm_i915_private *dev_priv,
wp->plane_pixel_rate = skl_adjusted_plane_pixel_rate(cstate,
intel_pstate);
+ if (INTEL_GEN(dev_priv) >= 11 &&
+ fb->modifier == I915_FORMAT_MOD_Yf_TILED && wp->cpp == 8)
+ wp->dbuf_block_size = 256;
+ else
+ wp->dbuf_block_size = 512;
+
if (drm_rotation_90_or_270(pstate->rotation)) {
switch (wp->cpp) {
@@ -4456,7 +4467,8 @@ skl_compute_plane_wm_params(const struct drm_i915_private *dev_priv,
wp->plane_bytes_per_line = wp->width * wp->cpp;
if (wp->y_tiled) {
interm_pbpl = DIV_ROUND_UP(wp->plane_bytes_per_line *
- wp->y_min_scanlines, 512);
+ wp->y_min_scanlines,
+ wp->dbuf_block_size);
if (INTEL_GEN(dev_priv) >= 10)
interm_pbpl++;
@@ -4464,10 +4476,12 @@ skl_compute_plane_wm_params(const struct drm_i915_private *dev_priv,
wp->plane_blocks_per_line = div_fixed16(interm_pbpl,
wp->y_min_scanlines);
} else if (wp->x_tiled && IS_GEN9(dev_priv)) {
- interm_pbpl = DIV_ROUND_UP(wp->plane_bytes_per_line, 512);
+ interm_pbpl = DIV_ROUND_UP(wp->plane_bytes_per_line,
+ wp->dbuf_block_size);
wp->plane_blocks_per_line = u32_to_fixed16(interm_pbpl);
} else {
- interm_pbpl = DIV_ROUND_UP(wp->plane_bytes_per_line, 512) + 1;
+ interm_pbpl = DIV_ROUND_UP(wp->plane_bytes_per_line,
+ wp->dbuf_block_size) + 1;
wp->plane_blocks_per_line = u32_to_fixed16(interm_pbpl);
}
@@ -4497,6 +4511,7 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
struct intel_atomic_state *state =
to_intel_atomic_state(cstate->base.state);
bool apply_memory_bw_wa = skl_needs_memory_bw_wa(state);
+ uint32_t min_disp_buf_needed;
if (latency == 0 ||
!intel_wm_plane_visible(cstate, intel_pstate)) {
@@ -4514,7 +4529,7 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
latency += 15;
method1 = skl_wm_method1(dev_priv, wp->plane_pixel_rate,
- wp->cpp, latency);
+ wp->cpp, latency, wp->dbuf_block_size);
method2 = skl_wm_method2(wp->plane_pixel_rate,
cstate->base.adjusted_mode.crtc_htotal,
latency,
@@ -4524,7 +4539,8 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
selected_result = max_fixed16(method2, wp->y_tile_minimum);
} else {
if ((wp->cpp * cstate->base.adjusted_mode.crtc_htotal /
- 512 < 1) && (wp->plane_bytes_per_line / 512 < 1))
+ wp->dbuf_block_size < 1) &&
+ (wp->plane_bytes_per_line / wp->dbuf_block_size < 1))
selected_result = method2;
else if (ddb_allocation >=
fixed16_to_u32_round_up(wp->plane_blocks_per_line))
@@ -4554,7 +4570,32 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
}
}
- if (res_blocks >= ddb_allocation || res_lines > 31) {
+ if (INTEL_GEN(dev_priv) >= 11) {
+ if (wp->y_tiled) {
+ uint32_t extra_lines;
+ uint_fixed_16_16_t fp_min_disp_buf_needed;
+
+ if (res_lines % wp->y_min_scanlines == 0)
+ extra_lines = wp->y_min_scanlines;
+ else
+ extra_lines = wp->y_min_scanlines * 2 -
+ res_lines % wp->y_min_scanlines;
+
+ fp_min_disp_buf_needed = mul_u32_fixed16(res_lines +
+ extra_lines,
+ wp->plane_blocks_per_line);
+ min_disp_buf_needed = fixed16_to_u32_round_up(
+ fp_min_disp_buf_needed);
+ } else {
+ min_disp_buf_needed = DIV_ROUND_UP(res_blocks * 11, 10);
+ }
+ } else {
+ min_disp_buf_needed = res_blocks;
+ }
+
+ if ((level > 0 && res_lines > 31) ||
+ res_blocks >= ddb_allocation ||
+ min_disp_buf_needed >= ddb_allocation) {
*enabled = false;
/*
@@ -4574,8 +4615,9 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
}
}
+ /* The number of lines are ignored for the level 0 watermark. */
+ *out_lines = level ? res_lines : 0;
*out_blocks = res_blocks;
- *out_lines = res_lines;
*enabled = true;
return 0;
@@ -4667,6 +4709,7 @@ static void skl_compute_transition_wm(struct intel_crtc_state *cstate,
if (!dev_priv->ipc_enabled)
goto exit;
+ trans_min = 0;
if (INTEL_GEN(dev_priv) >= 10)
trans_min = 4;
@@ -4790,8 +4833,10 @@ static void skl_write_plane_wm(struct intel_crtc *intel_crtc,
skl_ddb_entry_write(dev_priv, PLANE_BUF_CFG(pipe, plane_id),
&ddb->plane[pipe][plane_id]);
- skl_ddb_entry_write(dev_priv, PLANE_NV12_BUF_CFG(pipe, plane_id),
- &ddb->y_plane[pipe][plane_id]);
+ if (INTEL_GEN(dev_priv) < 11)
+ skl_ddb_entry_write(dev_priv,
+ PLANE_NV12_BUF_CFG(pipe, plane_id),
+ &ddb->y_plane[pipe][plane_id]);
}
static void skl_write_cursor_wm(struct intel_crtc *intel_crtc,
@@ -5819,6 +5864,7 @@ void ilk_wm_get_hw_state(struct drm_device *dev)
/**
* intel_update_watermarks - update FIFO watermark values based on current modes
+ * @crtc: the #intel_crtc on which to compute the WM
*
* Calculate watermark values for the various WM regs based on current mode
* and plane configuration.
@@ -6314,7 +6360,7 @@ void gen6_rps_idle(struct drm_i915_private *dev_priv)
mutex_unlock(&dev_priv->pcu_lock);
}
-void gen6_rps_boost(struct drm_i915_gem_request *rq,
+void gen6_rps_boost(struct i915_request *rq,
struct intel_rps_client *rps_client)
{
struct intel_rps *rps = &rq->i915->gt_pm.rps;
@@ -6327,12 +6373,15 @@ void gen6_rps_boost(struct drm_i915_gem_request *rq,
if (!rps->enabled)
return;
+ if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &rq->fence.flags))
+ return;
+
+ /* Serializes with i915_request_retire() */
boost = false;
spin_lock_irqsave(&rq->lock, flags);
- if (!rq->waitboost && !i915_gem_request_completed(rq)) {
- atomic_inc(&rps->num_waiters);
+ if (!rq->waitboost && !dma_fence_is_signaled_locked(&rq->fence)) {
+ boost = !atomic_fetch_inc(&rps->num_waiters);
rq->waitboost = true;
- boost = true;
}
spin_unlock_irqrestore(&rq->lock, flags);
if (!boost)
@@ -6626,9 +6675,29 @@ static void gen9_enable_rc6(struct drm_i915_private *dev_priv)
I915_WRITE(GEN6_RC_SLEEP, 0);
- /* 2c: Program Coarse Power Gating Policies. */
- I915_WRITE(GEN9_MEDIA_PG_IDLE_HYSTERESIS, 25);
- I915_WRITE(GEN9_RENDER_PG_IDLE_HYSTERESIS, 25);
+ /*
+ * 2c: Program Coarse Power Gating Policies.
+ *
+ * Bspec's guidance is to use 25us (really 25 * 1280ns) here. What we
+ * use instead is a more conservative estimate for the maximum time
+ * it takes us to service a CS interrupt and submit a new ELSP - that
+ * is the time which the GPU is idle waiting for the CPU to select the
+ * next request to execute. If the idle hysteresis is less than that
+ * interrupt service latency, the hardware will automatically gate
+ * the power well and we will then incur the wake up cost on top of
+ * the service latency. A similar guide from intel_pstate is that we
+ * do not want the enable hysteresis to less than the wakeup latency.
+ *
+ * igt/gem_exec_nop/sequential provides a rough estimate for the
+ * service latency, and puts it around 10us for Broadwell (and other
+ * big core) and around 40us for Broxton (and other low power cores).
+ * [Note that for legacy ringbuffer submission, this is less than 1us!]
+ * However, the wakeup latency on Broxton is closer to 100us. To be
+ * conservative, we have to factor in a context switch on top (due
+ * to ksoftirqd).
+ */
+ I915_WRITE(GEN9_MEDIA_PG_IDLE_HYSTERESIS, 250);
+ I915_WRITE(GEN9_RENDER_PG_IDLE_HYSTERESIS, 250);
/* 3a: Enable RC6 */
I915_WRITE(GEN6_RC6_THRESHOLD, 37500); /* 37.5/125ms per EI */
@@ -6646,7 +6715,7 @@ static void gen9_enable_rc6(struct drm_i915_private *dev_priv)
/*
* 3b: Enable Coarse Power Gating only when RC6 is enabled.
- * WaRsDisableCoarsePowerGating:skl,bxt - Render/Media PG need to be disabled with RC6.
+ * WaRsDisableCoarsePowerGating:skl,cnl - Render/Media PG need to be disabled with RC6.
*/
if (NEEDS_WaRsDisableCoarsePowerGating(dev_priv))
I915_WRITE(GEN9_PG_ENABLE, 0);
@@ -6873,7 +6942,7 @@ static void gen6_update_ring_freq(struct drm_i915_private *dev_priv)
* No floor required for ring frequency on SKL.
*/
ring_freq = gpu_freq;
- } else if (INTEL_INFO(dev_priv)->gen >= 8) {
+ } else if (INTEL_GEN(dev_priv) >= 8) {
/* max(2 * GT, DDR). NB: GT is 50MHz units */
ring_freq = max(min_ring_freq, gpu_freq);
} else if (IS_HASWELL(dev_priv)) {
@@ -7484,7 +7553,7 @@ unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
{
unsigned long val;
- if (INTEL_INFO(dev_priv)->gen != 5)
+ if (!IS_GEN5(dev_priv))
return 0;
spin_lock_irq(&mchdev_lock);
@@ -7568,7 +7637,7 @@ static void __i915_update_gfx_val(struct drm_i915_private *dev_priv)
void i915_update_gfx_val(struct drm_i915_private *dev_priv)
{
- if (INTEL_INFO(dev_priv)->gen != 5)
+ if (!IS_GEN5(dev_priv))
return;
spin_lock_irq(&mchdev_lock);
@@ -7619,7 +7688,7 @@ unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
{
unsigned long val;
- if (INTEL_INFO(dev_priv)->gen != 5)
+ if (!IS_GEN5(dev_priv))
return 0;
spin_lock_irq(&mchdev_lock);
@@ -7957,7 +8026,10 @@ void intel_sanitize_gt_powersave(struct drm_i915_private *dev_priv)
dev_priv->gt_pm.rc6.enabled = true; /* force RC6 disabling */
intel_disable_gt_powersave(dev_priv);
- gen6_reset_rps_interrupts(dev_priv);
+ if (INTEL_GEN(dev_priv) < 11)
+ gen6_reset_rps_interrupts(dev_priv);
+ else
+ WARN_ON_ONCE(1);
}
static inline void intel_disable_llc_pstate(struct drm_i915_private *i915)
@@ -8070,6 +8142,8 @@ static void intel_enable_rps(struct drm_i915_private *dev_priv)
cherryview_enable_rps(dev_priv);
} else if (IS_VALLEYVIEW(dev_priv)) {
valleyview_enable_rps(dev_priv);
+ } else if (WARN_ON_ONCE(INTEL_GEN(dev_priv) >= 11)) {
+ /* TODO */
} else if (INTEL_GEN(dev_priv) >= 9) {
gen9_enable_rps(dev_priv);
} else if (IS_BROADWELL(dev_priv)) {
@@ -8418,7 +8492,7 @@ static void cnp_init_clock_gating(struct drm_i915_private *dev_priv)
if (!HAS_PCH_CNP(dev_priv))
return;
- /* Display WA #1181: cnp */
+ /* Display WA #1181 WaSouthDisplayDisablePWMCGEGating: cnp */
I915_WRITE(SOUTH_DSPCLK_GATE_D, I915_READ(SOUTH_DSPCLK_GATE_D) |
CNP_PWM_CGE_GATING_DISABLE);
}
@@ -8448,7 +8522,13 @@ static void cnl_init_clock_gating(struct drm_i915_private *dev_priv)
val |= SARBUNIT_CLKGATE_DIS;
I915_WRITE(SLICE_UNIT_LEVEL_CLKGATE, val);
+ /* Wa_2201832410:cnl */
+ val = I915_READ(SUBSLICE_UNIT_LEVEL_CLKGATE);
+ val |= GWUNIT_CLKGATE_DIS;
+ I915_WRITE(SUBSLICE_UNIT_LEVEL_CLKGATE, val);
+
/* WaDisableVFclkgate:cnl */
+ /* WaVFUnitClockGatingDisable:cnl */
val = I915_READ(UNSLICE_UNIT_LEVEL_CLKGATE);
val |= VFUNIT_CLKGATE_DIS;
I915_WRITE(UNSLICE_UNIT_LEVEL_CLKGATE, val);
@@ -9150,7 +9230,8 @@ int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val
}
int sandybridge_pcode_write_timeout(struct drm_i915_private *dev_priv,
- u32 mbox, u32 val, int timeout_us)
+ u32 mbox, u32 val,
+ int fast_timeout_us, int slow_timeout_ms)
{
int status;
@@ -9173,7 +9254,8 @@ int sandybridge_pcode_write_timeout(struct drm_i915_private *dev_priv,
if (__intel_wait_for_register_fw(dev_priv,
GEN6_PCODE_MAILBOX, GEN6_PCODE_READY, 0,
- timeout_us, 0, NULL)) {
+ fast_timeout_us, slow_timeout_ms,
+ NULL)) {
DRM_ERROR("timeout waiting for pcode write of 0x%08x to mbox %x to finish for %ps\n",
val, mbox, __builtin_return_address(0));
return -ETIMEDOUT;
@@ -9348,15 +9430,16 @@ static u64 vlv_residency_raw(struct drm_i915_private *dev_priv,
const i915_reg_t reg)
{
u32 lower, upper, tmp;
- unsigned long flags;
int loop = 2;
- /* The register accessed do not need forcewake. We borrow
+ /*
+ * The register accessed do not need forcewake. We borrow
* uncore lock to prevent concurrent access to range reg.
*/
- spin_lock_irqsave(&dev_priv->uncore.lock, flags);
+ lockdep_assert_held(&dev_priv->uncore.lock);
- /* vlv and chv residency counters are 40 bits in width.
+ /*
+ * vlv and chv residency counters are 40 bits in width.
* With a control bit, we can choose between upper or lower
* 32bit window into this counter.
*
@@ -9380,29 +9463,49 @@ static u64 vlv_residency_raw(struct drm_i915_private *dev_priv,
upper = I915_READ_FW(reg);
} while (upper != tmp && --loop);
- /* Everywhere else we always use VLV_COUNTER_CONTROL with the
+ /*
+ * Everywhere else we always use VLV_COUNTER_CONTROL with the
* VLV_COUNT_RANGE_HIGH bit set - so it is safe to leave it set
* now.
*/
- spin_unlock_irqrestore(&dev_priv->uncore.lock, flags);
-
return lower | (u64)upper << 8;
}
u64 intel_rc6_residency_ns(struct drm_i915_private *dev_priv,
const i915_reg_t reg)
{
- u64 time_hw;
+ u64 time_hw, prev_hw, overflow_hw;
+ unsigned int fw_domains;
+ unsigned long flags;
+ unsigned int i;
u32 mul, div;
if (!HAS_RC6(dev_priv))
return 0;
+ /*
+ * Store previous hw counter values for counter wrap-around handling.
+ *
+ * There are only four interesting registers and they live next to each
+ * other so we can use the relative address, compared to the smallest
+ * one as the index into driver storage.
+ */
+ i = (i915_mmio_reg_offset(reg) -
+ i915_mmio_reg_offset(GEN6_GT_GFX_RC6_LOCKED)) / sizeof(u32);
+ if (WARN_ON_ONCE(i >= ARRAY_SIZE(dev_priv->gt_pm.rc6.cur_residency)))
+ return 0;
+
+ fw_domains = intel_uncore_forcewake_for_reg(dev_priv, reg, FW_REG_READ);
+
+ spin_lock_irqsave(&dev_priv->uncore.lock, flags);
+ intel_uncore_forcewake_get__locked(dev_priv, fw_domains);
+
/* On VLV and CHV, residency time is in CZ units rather than 1.28us */
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
mul = 1000000;
div = dev_priv->czclk_freq;
+ overflow_hw = BIT_ULL(40);
time_hw = vlv_residency_raw(dev_priv, reg);
} else {
/* 833.33ns units on Gen9LP, 1.28us elsewhere. */
@@ -9414,10 +9517,33 @@ u64 intel_rc6_residency_ns(struct drm_i915_private *dev_priv,
div = 1;
}
- time_hw = I915_READ(reg);
+ overflow_hw = BIT_ULL(32);
+ time_hw = I915_READ_FW(reg);
}
- return DIV_ROUND_UP_ULL(time_hw * mul, div);
+ /*
+ * Counter wrap handling.
+ *
+ * But relying on a sufficient frequency of queries otherwise counters
+ * can still wrap.
+ */
+ prev_hw = dev_priv->gt_pm.rc6.prev_hw_residency[i];
+ dev_priv->gt_pm.rc6.prev_hw_residency[i] = time_hw;
+
+ /* RC6 delta from last sample. */
+ if (time_hw >= prev_hw)
+ time_hw -= prev_hw;
+ else
+ time_hw += overflow_hw - prev_hw;
+
+ /* Add delta to RC6 extended raw driver copy. */
+ time_hw += dev_priv->gt_pm.rc6.cur_residency[i];
+ dev_priv->gt_pm.rc6.cur_residency[i] = time_hw;
+
+ intel_uncore_forcewake_put__locked(dev_priv, fw_domains);
+ spin_unlock_irqrestore(&dev_priv->uncore.lock, flags);
+
+ return mul_u64_u32_div(time_hw, mul, div);
}
u32 intel_get_cagf(struct drm_i915_private *dev_priv, u32 rpstat)
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