@@ -1022,8 +1022,6 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
u32 rpmodectl, freq_sts;
- mutex_lock(&dev_priv->pcu_lock);
-
rpmodectl = I915_READ(GEN6_RP_CONTROL);
seq_printf(m, "Video Turbo Mode: %s\n",
yesno(rpmodectl & GEN6_RP_MEDIA_TURBO));
@@ -1058,7 +1056,6 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
seq_printf(m,
"efficient (RPe) frequency: %d MHz\n",
intel_gpu_freq(dev_priv, rps->efficient_freq));
- mutex_unlock(&dev_priv->pcu_lock);
} else if (INTEL_GEN(dev_priv) >= 6) {
u32 rp_state_limits;
u32 gt_perf_status;
@@ -1486,9 +1483,7 @@ static int gen6_drpc_info(struct seq_file *m)
gen9_powergate_status = I915_READ(GEN9_PWRGT_DOMAIN_STATUS);
}
- mutex_lock(&dev_priv->pcu_lock);
sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
- mutex_unlock(&dev_priv->pcu_lock);
seq_printf(m, "RC1e Enabled: %s\n",
yesno(rcctl1 & GEN6_RC_CTL_RC1e_ENABLE));
@@ -1754,30 +1749,24 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused)
{
struct drm_i915_private *dev_priv = node_to_i915(m->private);
struct intel_rps *rps = &dev_priv->gt_pm.rps;
- int ret = 0;
int gpu_freq, ia_freq;
unsigned int max_gpu_freq, min_gpu_freq;
if (!HAS_LLC(dev_priv))
return -ENODEV;
- intel_runtime_pm_get(dev_priv);
-
- ret = mutex_lock_interruptible(&dev_priv->pcu_lock);
- if (ret)
- goto out;
+ min_gpu_freq = rps->min_freq;
+ max_gpu_freq = rps->max_freq;
if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
/* Convert GT frequency to 50 HZ units */
- min_gpu_freq = rps->min_freq_softlimit / GEN9_FREQ_SCALER;
- max_gpu_freq = rps->max_freq_softlimit / GEN9_FREQ_SCALER;
- } else {
- min_gpu_freq = rps->min_freq_softlimit;
- max_gpu_freq = rps->max_freq_softlimit;
+ min_gpu_freq /= GEN9_FREQ_SCALER;
+ max_gpu_freq /= GEN9_FREQ_SCALER;
}
seq_puts(m, "GPU freq (MHz)\tEffective CPU freq (MHz)\tEffective Ring freq (MHz)\n");
+ intel_runtime_pm_get(dev_priv);
for (gpu_freq = min_gpu_freq; gpu_freq <= max_gpu_freq; gpu_freq++) {
ia_freq = gpu_freq;
sandybridge_pcode_read(dev_priv,
@@ -1791,12 +1780,9 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused)
((ia_freq >> 0) & 0xff) * 100,
((ia_freq >> 8) & 0xff) * 100);
}
-
- mutex_unlock(&dev_priv->pcu_lock);
-
-out:
intel_runtime_pm_put(dev_priv);
- return ret;
+
+ return 0;
}
static int i915_opregion(struct seq_file *m, void *unused)
@@ -4131,7 +4117,7 @@ i915_max_freq_set(void *data, u64 val)
DRM_DEBUG_DRIVER("Manually setting max freq to %llu\n", val);
- ret = mutex_lock_interruptible(&dev_priv->pcu_lock);
+ ret = mutex_lock_interruptible(&rps->lock);
if (ret)
return ret;
@@ -4144,8 +4130,8 @@ i915_max_freq_set(void *data, u64 val)
hw_min = rps->min_freq;
if (val < hw_min || val > hw_max || val < rps->min_freq_softlimit) {
- mutex_unlock(&dev_priv->pcu_lock);
- return -EINVAL;
+ ret = -EINVAL;
+ goto unlock;
}
rps->max_freq_softlimit = val;
@@ -4153,9 +4139,9 @@ i915_max_freq_set(void *data, u64 val)
if (intel_set_rps(dev_priv, val))
DRM_DEBUG_DRIVER("failed to update RPS to new softlimit\n");
- mutex_unlock(&dev_priv->pcu_lock);
-
- return 0;
+unlock:
+ mutex_unlock(&rps->lock);
+ return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(i915_max_freq_fops,
@@ -4187,7 +4173,7 @@ i915_min_freq_set(void *data, u64 val)
DRM_DEBUG_DRIVER("Manually setting min freq to %llu\n", val);
- ret = mutex_lock_interruptible(&dev_priv->pcu_lock);
+ ret = mutex_lock_interruptible(&rps->lock);
if (ret)
return ret;
@@ -4201,8 +4187,8 @@ i915_min_freq_set(void *data, u64 val)
if (val < hw_min ||
val > hw_max || val > rps->max_freq_softlimit) {
- mutex_unlock(&dev_priv->pcu_lock);
- return -EINVAL;
+ ret = -EINVAL;
+ goto unlock;
}
rps->min_freq_softlimit = val;
@@ -4210,9 +4196,9 @@ i915_min_freq_set(void *data, u64 val)
if (intel_set_rps(dev_priv, val))
DRM_DEBUG_DRIVER("failed to update RPS to new softlimit\n");
- mutex_unlock(&dev_priv->pcu_lock);
-
- return 0;
+unlock:
+ mutex_unlock(&rps->lock);
+ return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(i915_min_freq_fops,
@@ -892,6 +892,8 @@ struct intel_rps_ei {
};
struct intel_rps {
+ struct mutex lock;
+
/*
* work, interrupts_enabled and pm_iir are protected by
* dev_priv->irq_lock
@@ -2034,14 +2036,6 @@ struct drm_i915_private {
/* Cannot be determined by PCIID. You must always read a register. */
u32 edram_cap;
- /*
- * Protects RPS/RC6 register access and PCU communication.
- * Must be taken after struct_mutex if nested. Note that
- * this lock may be held for long periods of time when
- * talking to hw - so only take it when talking to hw!
- */
- struct mutex pcu_lock;
-
/* gen6+ GT PM state */
struct intel_gen6_power_mgmt gt_pm;
@@ -1191,7 +1191,7 @@ static void gen6_pm_rps_work(struct work_struct *work)
if ((pm_iir & dev_priv->pm_rps_events) == 0 && !client_boost)
goto out;
- mutex_lock(&dev_priv->pcu_lock);
+ mutex_lock(&rps->lock);
pm_iir |= vlv_wa_c0_ei(dev_priv, pm_iir);
@@ -1245,7 +1245,7 @@ static void gen6_pm_rps_work(struct work_struct *work)
rps->last_adj = 0;
}
- mutex_unlock(&dev_priv->pcu_lock);
+ mutex_unlock(&rps->lock);
out:
/* Make sure not to corrupt PMIMR state used by ringbuffer on GEN6 */
@@ -262,7 +262,6 @@ static ssize_t gt_act_freq_mhz_show(struct device *kdev,
intel_runtime_pm_get(dev_priv);
- mutex_lock(&dev_priv->pcu_lock);
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
vlv_sideband_get(dev_priv);
@@ -273,7 +272,6 @@ static ssize_t gt_act_freq_mhz_show(struct device *kdev,
} else {
freq = intel_get_cagf(dev_priv, I915_READ(GEN6_RPSTAT1));
}
- mutex_unlock(&dev_priv->pcu_lock);
intel_runtime_pm_put(dev_priv);
@@ -317,9 +315,11 @@ static ssize_t gt_boost_freq_mhz_store(struct device *kdev,
if (val < rps->min_freq || val > rps->max_freq)
return -EINVAL;
- mutex_lock(&dev_priv->pcu_lock);
- rps->boost_freq = val;
- mutex_unlock(&dev_priv->pcu_lock);
+ if (val != READ_ONCE(rps->boost_freq)) {
+ WRITE_ONCE(rps->boost_freq, val);
+ if (atomic_read(&rps->num_waiters))
+ schedule_work(&rps->work);
+ }
return count;
}
@@ -357,17 +357,14 @@ static ssize_t gt_max_freq_mhz_store(struct device *kdev,
return ret;
intel_runtime_pm_get(dev_priv);
-
- mutex_lock(&dev_priv->pcu_lock);
+ mutex_lock(&rps->lock);
val = intel_freq_opcode(dev_priv, val);
-
if (val < rps->min_freq ||
val > rps->max_freq ||
val < rps->min_freq_softlimit) {
- mutex_unlock(&dev_priv->pcu_lock);
- intel_runtime_pm_put(dev_priv);
- return -EINVAL;
+ ret = -EINVAL;
+ goto unlock;
}
if (val > rps->rp0_freq)
@@ -385,8 +382,8 @@ static ssize_t gt_max_freq_mhz_store(struct device *kdev,
* frequency request may be unchanged. */
ret = intel_set_rps(dev_priv, val);
- mutex_unlock(&dev_priv->pcu_lock);
-
+unlock:
+ mutex_unlock(&rps->lock);
intel_runtime_pm_put(dev_priv);
return ret ?: count;
@@ -415,17 +412,14 @@ static ssize_t gt_min_freq_mhz_store(struct device *kdev,
return ret;
intel_runtime_pm_get(dev_priv);
-
- mutex_lock(&dev_priv->pcu_lock);
+ mutex_lock(&rps->lock);
val = intel_freq_opcode(dev_priv, val);
-
if (val < rps->min_freq ||
val > rps->max_freq ||
val > rps->max_freq_softlimit) {
- mutex_unlock(&dev_priv->pcu_lock);
- intel_runtime_pm_put(dev_priv);
- return -EINVAL;
+ ret = -EINVAL;
+ goto unlock;
}
rps->min_freq_softlimit = val;
@@ -439,8 +433,8 @@ static ssize_t gt_min_freq_mhz_store(struct device *kdev,
* frequency request may be unchanged. */
ret = intel_set_rps(dev_priv, val);
- mutex_unlock(&dev_priv->pcu_lock);
-
+unlock:
+ mutex_unlock(&rps->lock);
intel_runtime_pm_put(dev_priv);
return ret ?: count;
@@ -461,7 +461,6 @@ static void vlv_get_cdclk(struct drm_i915_private *dev_priv,
{
u32 val;
- mutex_lock(&dev_priv->pcu_lock);
vlv_sideband_get(dev_priv);
cdclk_state->vco = vlv_get_hpll_vco(dev_priv);
@@ -472,7 +471,6 @@ static void vlv_get_cdclk(struct drm_i915_private *dev_priv,
val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
vlv_sideband_put(dev_priv);
- mutex_unlock(&dev_priv->pcu_lock);
if (IS_VALLEYVIEW(dev_priv))
cdclk_state->voltage_level = (val & DSPFREQGUAR_MASK) >>
@@ -546,7 +544,6 @@ static void vlv_set_cdclk(struct drm_i915_private *dev_priv,
vlv_sideband_get(dev_priv);
- mutex_lock(&dev_priv->pcu_lock);
val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
val &= ~DSPFREQGUAR_MASK;
val |= (cmd << DSPFREQGUAR_SHIFT);
@@ -556,7 +553,6 @@ static void vlv_set_cdclk(struct drm_i915_private *dev_priv,
50)) {
DRM_ERROR("timed out waiting for CDclk change\n");
}
- mutex_unlock(&dev_priv->pcu_lock);
if (cdclk == 400000) {
u32 divider;
@@ -624,7 +620,6 @@ static void chv_set_cdclk(struct drm_i915_private *dev_priv,
*/
intel_display_power_get(dev_priv, POWER_DOMAIN_PIPE_A);
- mutex_lock(&dev_priv->pcu_lock);
vlv_sideband_get(dev_priv);
val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
@@ -638,7 +633,6 @@ static void chv_set_cdclk(struct drm_i915_private *dev_priv,
}
vlv_sideband_put(dev_priv);
- mutex_unlock(&dev_priv->pcu_lock);
intel_update_cdclk(dev_priv);
@@ -716,10 +710,8 @@ static void bdw_set_cdclk(struct drm_i915_private *dev_priv,
"trying to change cdclk frequency with cdclk not enabled\n"))
return;
- mutex_lock(&dev_priv->pcu_lock);
ret = sandybridge_pcode_write(dev_priv,
BDW_PCODE_DISPLAY_FREQ_CHANGE_REQ, 0x0);
- mutex_unlock(&dev_priv->pcu_lock);
if (ret) {
DRM_ERROR("failed to inform pcode about cdclk change\n");
return;
@@ -768,10 +760,8 @@ static void bdw_set_cdclk(struct drm_i915_private *dev_priv,
LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1))
DRM_ERROR("Switching back to LCPLL failed\n");
- mutex_lock(&dev_priv->pcu_lock);
sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ,
cdclk_state->voltage_level);
- mutex_unlock(&dev_priv->pcu_lock);
I915_WRITE(CDCLK_FREQ, DIV_ROUND_CLOSEST(cdclk, 1000) - 1);
@@ -999,12 +989,10 @@ static void skl_set_cdclk(struct drm_i915_private *dev_priv,
u32 freq_select, cdclk_ctl;
int ret;
- mutex_lock(&dev_priv->pcu_lock);
ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL,
SKL_CDCLK_PREPARE_FOR_CHANGE,
SKL_CDCLK_READY_FOR_CHANGE,
SKL_CDCLK_READY_FOR_CHANGE, 3);
- mutex_unlock(&dev_priv->pcu_lock);
if (ret) {
DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n",
ret);
@@ -1068,10 +1056,8 @@ static void skl_set_cdclk(struct drm_i915_private *dev_priv,
POSTING_READ(CDCLK_CTL);
/* inform PCU of the change */
- mutex_lock(&dev_priv->pcu_lock);
sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL,
cdclk_state->voltage_level);
- mutex_unlock(&dev_priv->pcu_lock);
intel_update_cdclk(dev_priv);
}
@@ -1379,11 +1365,8 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
}
/* Inform power controller of upcoming frequency change */
- mutex_lock(&dev_priv->pcu_lock);
ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ,
0x80000000);
- mutex_unlock(&dev_priv->pcu_lock);
-
if (ret) {
DRM_ERROR("PCode CDCLK freq change notify failed (err %d, freq %d)\n",
ret, cdclk);
@@ -1411,11 +1394,8 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
val |= BXT_CDCLK_SSA_PRECHARGE_ENABLE;
I915_WRITE(CDCLK_CTL, val);
- mutex_lock(&dev_priv->pcu_lock);
ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ,
cdclk_state->voltage_level);
- mutex_unlock(&dev_priv->pcu_lock);
-
if (ret) {
DRM_ERROR("PCode CDCLK freq set failed, (err %d, freq %d)\n",
ret, cdclk);
@@ -1653,12 +1633,10 @@ static void cnl_set_cdclk(struct drm_i915_private *dev_priv,
u32 val, divider;
int ret;
- mutex_lock(&dev_priv->pcu_lock);
ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL,
SKL_CDCLK_PREPARE_FOR_CHANGE,
SKL_CDCLK_READY_FOR_CHANGE,
SKL_CDCLK_READY_FOR_CHANGE, 3);
- mutex_unlock(&dev_priv->pcu_lock);
if (ret) {
DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n",
ret);
@@ -1695,10 +1673,8 @@ static void cnl_set_cdclk(struct drm_i915_private *dev_priv,
I915_WRITE(CDCLK_CTL, val);
/* inform PCU of the change */
- mutex_lock(&dev_priv->pcu_lock);
sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL,
cdclk_state->voltage_level);
- mutex_unlock(&dev_priv->pcu_lock);
intel_update_cdclk(dev_priv);
@@ -4858,10 +4858,8 @@ void hsw_enable_ips(const struct intel_crtc_state *crtc_state)
WARN_ON(!(crtc_state->active_planes & ~BIT(PLANE_CURSOR)));
if (IS_BROADWELL(dev_priv)) {
- mutex_lock(&dev_priv->pcu_lock);
WARN_ON(sandybridge_pcode_write(dev_priv, DISPLAY_IPS_CONTROL,
IPS_ENABLE | IPS_PCODE_CONTROL));
- mutex_unlock(&dev_priv->pcu_lock);
/* Quoting Art Runyan: "its not safe to expect any particular
* value in IPS_CTL bit 31 after enabling IPS through the
* mailbox." Moreover, the mailbox may return a bogus state,
@@ -4891,9 +4889,7 @@ void hsw_disable_ips(const struct intel_crtc_state *crtc_state)
return;
if (IS_BROADWELL(dev_priv)) {
- mutex_lock(&dev_priv->pcu_lock);
WARN_ON(sandybridge_pcode_write(dev_priv, DISPLAY_IPS_CONTROL, 0));
- mutex_unlock(&dev_priv->pcu_lock);
/* wait for pcode to finish disabling IPS, which may take up to 42ms */
if (intel_wait_for_register(dev_priv,
IPS_CTL, IPS_ENABLE, 0,
@@ -8732,11 +8728,9 @@ static uint32_t hsw_read_dcomp(struct drm_i915_private *dev_priv)
static void hsw_write_dcomp(struct drm_i915_private *dev_priv, uint32_t val)
{
if (IS_HASWELL(dev_priv)) {
- mutex_lock(&dev_priv->pcu_lock);
if (sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_D_COMP,
val))
DRM_DEBUG_KMS("Failed to write to D_COMP\n");
- mutex_unlock(&dev_priv->pcu_lock);
} else {
I915_WRITE(D_COMP_BDW, val);
POSTING_READ(D_COMP_BDW);
@@ -50,9 +50,7 @@ static int intel_hdcp_load_keys(struct drm_i915_private *dev_priv)
u32 val;
/* Initiate loading the HDCP key from fuses */
- mutex_lock(&dev_priv->pcu_lock);
ret = sandybridge_pcode_write(dev_priv, SKL_PCODE_LOAD_HDCP_KEYS, 1);
- mutex_unlock(&dev_priv->pcu_lock);
if (ret) {
DRM_ERROR("Failed to initiate HDCP key load (%d)\n", ret);
return ret;
@@ -310,7 +310,6 @@ static void chv_set_memory_dvfs(struct drm_i915_private *dev_priv, bool enable)
{
u32 val;
- mutex_lock(&dev_priv->pcu_lock);
vlv_sideband_get(dev_priv);
val = vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2);
@@ -327,14 +326,12 @@ static void chv_set_memory_dvfs(struct drm_i915_private *dev_priv, bool enable)
DRM_ERROR("timed out waiting for Punit DDR DVFS request\n");
vlv_sideband_put(dev_priv);
- mutex_unlock(&dev_priv->pcu_lock);
}
static void chv_set_memory_pm5(struct drm_i915_private *dev_priv, bool enable)
{
u32 val;
- mutex_lock(&dev_priv->pcu_lock);
vlv_sideband_get(dev_priv);
val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
@@ -345,7 +342,6 @@ static void chv_set_memory_pm5(struct drm_i915_private *dev_priv, bool enable)
vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, val);
vlv_sideband_put(dev_priv);
- mutex_unlock(&dev_priv->pcu_lock);
}
#define FW_WM(value, plane) \
@@ -2809,11 +2805,9 @@ static void intel_read_wm_latency(struct drm_i915_private *dev_priv,
/* read the first set of memory latencies[0:3] */
val = 0; /* data0 to be programmed to 0 for first set */
- mutex_lock(&dev_priv->pcu_lock);
ret = sandybridge_pcode_read(dev_priv,
GEN9_PCODE_READ_MEM_LATENCY,
&val);
- mutex_unlock(&dev_priv->pcu_lock);
if (ret) {
DRM_ERROR("SKL Mailbox read error = %d\n", ret);
@@ -2830,11 +2824,9 @@ static void intel_read_wm_latency(struct drm_i915_private *dev_priv,
/* read the second set of memory latencies[4:7] */
val = 1; /* data0 to be programmed to 1 for second set */
- mutex_lock(&dev_priv->pcu_lock);
ret = sandybridge_pcode_read(dev_priv,
GEN9_PCODE_READ_MEM_LATENCY,
&val);
- mutex_unlock(&dev_priv->pcu_lock);
if (ret) {
DRM_ERROR("SKL Mailbox read error = %d\n", ret);
return;
@@ -3625,13 +3617,10 @@ intel_enable_sagv(struct drm_i915_private *dev_priv)
return 0;
DRM_DEBUG_KMS("Enabling the SAGV\n");
- mutex_lock(&dev_priv->pcu_lock);
-
ret = sandybridge_pcode_write(dev_priv, GEN9_PCODE_SAGV_CONTROL,
GEN9_SAGV_ENABLE);
/* We don't need to wait for the SAGV when enabling */
- mutex_unlock(&dev_priv->pcu_lock);
/*
* Some skl systems, pre-release machines in particular,
@@ -3662,15 +3651,11 @@ intel_disable_sagv(struct drm_i915_private *dev_priv)
return 0;
DRM_DEBUG_KMS("Disabling the SAGV\n");
- mutex_lock(&dev_priv->pcu_lock);
-
/* bspec says to keep retrying for at least 1 ms */
ret = skl_pcode_request(dev_priv, GEN9_PCODE_SAGV_CONTROL,
GEN9_SAGV_DISABLE,
GEN9_SAGV_IS_DISABLED, GEN9_SAGV_IS_DISABLED,
1);
- mutex_unlock(&dev_priv->pcu_lock);
-
/*
* Some skl systems, pre-release machines in particular,
* don't actually have an SAGV.
@@ -5639,7 +5624,6 @@ void vlv_wm_get_hw_state(struct drm_device *dev)
wm->level = VLV_WM_LEVEL_PM2;
if (IS_CHERRYVIEW(dev_priv)) {
- mutex_lock(&dev_priv->pcu_lock);
vlv_sideband_get(dev_priv);
val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
@@ -5671,7 +5655,6 @@ void vlv_wm_get_hw_state(struct drm_device *dev)
}
vlv_sideband_put(dev_priv);
- mutex_unlock(&dev_priv->pcu_lock);
}
for_each_intel_crtc(dev, crtc) {
@@ -6278,7 +6261,7 @@ void gen6_rps_busy(struct drm_i915_private *dev_priv)
{
struct intel_rps *rps = &dev_priv->gt_pm.rps;
- mutex_lock(&dev_priv->pcu_lock);
+ mutex_lock(&rps->lock);
if (rps->enabled) {
u8 freq;
@@ -6301,7 +6284,7 @@ void gen6_rps_busy(struct drm_i915_private *dev_priv)
rps->max_freq_softlimit)))
DRM_DEBUG_DRIVER("Failed to set idle frequency\n");
}
- mutex_unlock(&dev_priv->pcu_lock);
+ mutex_unlock(&rps->lock);
}
void gen6_rps_idle(struct drm_i915_private *dev_priv)
@@ -6315,7 +6298,7 @@ void gen6_rps_idle(struct drm_i915_private *dev_priv)
*/
gen6_disable_rps_interrupts(dev_priv);
- mutex_lock(&dev_priv->pcu_lock);
+ mutex_lock(&rps->lock);
if (rps->enabled) {
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
vlv_set_rps_idle(dev_priv);
@@ -6325,7 +6308,7 @@ void gen6_rps_idle(struct drm_i915_private *dev_priv)
I915_WRITE(GEN6_PMINTRMSK,
gen6_sanitize_rps_pm_mask(dev_priv, ~0));
}
- mutex_unlock(&dev_priv->pcu_lock);
+ mutex_unlock(&rps->lock);
}
void gen6_rps_boost(struct drm_i915_gem_request *rq,
@@ -6363,7 +6346,7 @@ int intel_set_rps(struct drm_i915_private *dev_priv, u8 val)
struct intel_rps *rps = &dev_priv->gt_pm.rps;
int err;
- lockdep_assert_held(&dev_priv->pcu_lock);
+ lockdep_assert_held(&rps->lock);
GEM_BUG_ON(val > rps->max_freq);
GEM_BUG_ON(val < rps->min_freq);
@@ -6842,7 +6825,7 @@ static void gen6_update_ring_freq(struct drm_i915_private *dev_priv)
int scaling_factor = 180;
struct cpufreq_policy *policy;
- WARN_ON(!mutex_is_locked(&dev_priv->pcu_lock));
+ lockdep_assert_held(&rps->lock);
policy = cpufreq_cpu_get(0);
if (policy) {
@@ -7908,7 +7891,7 @@ void intel_init_gt_powersave(struct drm_i915_private *dev_priv)
intel_runtime_pm_get(dev_priv);
}
- mutex_lock(&dev_priv->pcu_lock);
+ mutex_lock(&rps->lock);
/* Initialize RPS limits (for userspace) */
if (IS_CHERRYVIEW(dev_priv))
@@ -7948,7 +7931,7 @@ void intel_init_gt_powersave(struct drm_i915_private *dev_priv)
/* Finally allow us to boost to max by default */
rps->boost_freq = rps->max_freq;
- mutex_unlock(&dev_priv->pcu_lock);
+ mutex_unlock(&rps->lock);
}
void intel_cleanup_gt_powersave(struct drm_i915_private *dev_priv)
@@ -7987,7 +7970,7 @@ void intel_sanitize_gt_powersave(struct drm_i915_private *dev_priv)
static inline void intel_disable_llc_pstate(struct drm_i915_private *i915)
{
- lockdep_assert_held(&i915->pcu_lock);
+ lockdep_assert_held(&i915->gt_pm.rps.lock);
if (!i915->gt_pm.llc_pstate.enabled)
return;
@@ -7999,7 +7982,7 @@ static inline void intel_disable_llc_pstate(struct drm_i915_private *i915)
static void intel_disable_rc6(struct drm_i915_private *dev_priv)
{
- lockdep_assert_held(&dev_priv->pcu_lock);
+ lockdep_assert_held(&dev_priv->gt_pm.rps.lock);
if (!dev_priv->gt_pm.rc6.enabled)
return;
@@ -8018,7 +8001,7 @@ static void intel_disable_rc6(struct drm_i915_private *dev_priv)
static void intel_disable_rps(struct drm_i915_private *dev_priv)
{
- lockdep_assert_held(&dev_priv->pcu_lock);
+ lockdep_assert_held(&dev_priv->gt_pm.rps.lock);
if (!dev_priv->gt_pm.rps.enabled)
return;
@@ -8039,19 +8022,19 @@ static void intel_disable_rps(struct drm_i915_private *dev_priv)
void intel_disable_gt_powersave(struct drm_i915_private *dev_priv)
{
- mutex_lock(&dev_priv->pcu_lock);
+ mutex_lock(&dev_priv->gt_pm.rps.lock);
intel_disable_rc6(dev_priv);
intel_disable_rps(dev_priv);
if (HAS_LLC(dev_priv))
intel_disable_llc_pstate(dev_priv);
- mutex_unlock(&dev_priv->pcu_lock);
+ mutex_unlock(&dev_priv->gt_pm.rps.lock);
}
static inline void intel_enable_llc_pstate(struct drm_i915_private *i915)
{
- lockdep_assert_held(&i915->pcu_lock);
+ lockdep_assert_held(&i915->gt_pm.rps.lock);
if (i915->gt_pm.llc_pstate.enabled)
return;
@@ -8063,7 +8046,7 @@ static inline void intel_enable_llc_pstate(struct drm_i915_private *i915)
static void intel_enable_rc6(struct drm_i915_private *dev_priv)
{
- lockdep_assert_held(&dev_priv->pcu_lock);
+ lockdep_assert_held(&dev_priv->gt_pm.rps.lock);
if (dev_priv->gt_pm.rc6.enabled)
return;
@@ -8086,7 +8069,7 @@ static void intel_enable_rps(struct drm_i915_private *dev_priv)
{
struct intel_rps *rps = &dev_priv->gt_pm.rps;
- lockdep_assert_held(&dev_priv->pcu_lock);
+ lockdep_assert_held(&rps->lock);
if (rps->enabled)
return;
@@ -8121,7 +8104,7 @@ void intel_enable_gt_powersave(struct drm_i915_private *dev_priv)
if (intel_vgpu_active(dev_priv))
return;
- mutex_lock(&dev_priv->pcu_lock);
+ mutex_lock(&dev_priv->gt_pm.rps.lock);
if (HAS_RC6(dev_priv))
intel_enable_rc6(dev_priv);
@@ -8129,7 +8112,7 @@ void intel_enable_gt_powersave(struct drm_i915_private *dev_priv)
if (HAS_LLC(dev_priv))
intel_enable_llc_pstate(dev_priv);
- mutex_unlock(&dev_priv->pcu_lock);
+ mutex_unlock(&dev_priv->gt_pm.rps.lock);
}
static void ibx_init_clock_gating(struct drm_i915_private *dev_priv)
@@ -9128,11 +9111,11 @@ static inline int gen7_check_mailbox_status(struct drm_i915_private *dev_priv)
}
}
-int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val)
+static int __sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val)
{
int status;
- WARN_ON(!mutex_is_locked(&dev_priv->pcu_lock));
+ lockdep_assert_held(&dev_priv->sb_lock);
/* GEN6_PCODE_* are outside of the forcewake domain, we can
* use te fw I915_READ variants to reduce the amount of work
@@ -9174,12 +9157,21 @@ int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val
return 0;
}
-int sandybridge_pcode_write(struct drm_i915_private *dev_priv,
- u32 mbox, u32 val)
+int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val)
{
int status;
- WARN_ON(!mutex_is_locked(&dev_priv->pcu_lock));
+ mutex_lock(&dev_priv->sb_lock);
+ status = __sandybridge_pcode_read(dev_priv, mbox, val);
+ mutex_unlock(&dev_priv->sb_lock);
+
+ return status;
+}
+
+static int __sandybridge_pcode_write(struct drm_i915_private *dev_priv,
+ u32 mbox, u32 val)
+{
+ int status;
/* GEN6_PCODE_* are outside of the forcewake domain, we can
* use te fw I915_READ variants to reduce the amount of work
@@ -9220,13 +9212,25 @@ int sandybridge_pcode_write(struct drm_i915_private *dev_priv,
return 0;
}
+int sandybridge_pcode_write(struct drm_i915_private *dev_priv,
+ u32 mbox, u32 val)
+{
+ int status;
+
+ mutex_lock(&dev_priv->sb_lock);
+ status = __sandybridge_pcode_write(dev_priv, mbox, val);
+ mutex_unlock(&dev_priv->sb_lock);
+
+ return status;
+}
+
static bool skl_pcode_try_request(struct drm_i915_private *dev_priv, u32 mbox,
u32 request, u32 reply_mask, u32 reply,
u32 *status)
{
u32 val = request;
- *status = sandybridge_pcode_read(dev_priv, mbox, &val);
+ *status = __sandybridge_pcode_read(dev_priv, mbox, &val);
return *status || ((val & reply_mask) == reply);
}
@@ -9256,7 +9260,7 @@ int skl_pcode_request(struct drm_i915_private *dev_priv, u32 mbox, u32 request,
u32 status;
int ret;
- WARN_ON(!mutex_is_locked(&dev_priv->pcu_lock));
+ mutex_lock(&dev_priv->sb_lock);
#define COND skl_pcode_try_request(dev_priv, mbox, request, reply_mask, reply, \
&status)
@@ -9292,6 +9296,7 @@ int skl_pcode_request(struct drm_i915_private *dev_priv, u32 mbox, u32 request,
preempt_enable();
out:
+ mutex_unlock(&dev_priv->sb_lock);
return ret ? ret : status;
#undef COND
}
@@ -9361,8 +9366,7 @@ int intel_freq_opcode(struct drm_i915_private *dev_priv, int val)
void intel_pm_setup(struct drm_i915_private *dev_priv)
{
- mutex_init(&dev_priv->pcu_lock);
-
+ mutex_init(&dev_priv->gt_pm.rps.lock);
atomic_set(&dev_priv->gt_pm.rps.num_waiters, 0);
dev_priv->runtime_pm.suspended = false;
@@ -798,7 +798,6 @@ static void vlv_set_power_well(struct drm_i915_private *dev_priv,
state = enable ? PUNIT_PWRGT_PWR_ON(power_well_id) :
PUNIT_PWRGT_PWR_GATE(power_well_id);
- mutex_lock(&dev_priv->pcu_lock);
vlv_sideband_get(dev_priv);
#define COND \
@@ -821,7 +820,6 @@ static void vlv_set_power_well(struct drm_i915_private *dev_priv,
out:
vlv_sideband_put(dev_priv);
- mutex_unlock(&dev_priv->pcu_lock);
}
static void vlv_power_well_enable(struct drm_i915_private *dev_priv,
@@ -848,7 +846,6 @@ static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
mask = PUNIT_PWRGT_MASK(power_well_id);
ctrl = PUNIT_PWRGT_PWR_ON(power_well_id);
- mutex_lock(&dev_priv->pcu_lock);
vlv_sideband_get(dev_priv);
state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask;
@@ -869,7 +866,6 @@ static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
WARN_ON(ctrl != state);
vlv_sideband_put(dev_priv);
- mutex_unlock(&dev_priv->pcu_lock);
return enabled;
}
@@ -1381,7 +1377,6 @@ static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv,
bool enabled;
u32 state, ctrl;
- mutex_lock(&dev_priv->pcu_lock);
vlv_sideband_get(dev_priv);
state = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ) & DP_SSS_MASK(pipe);
@@ -1400,7 +1395,6 @@ static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv,
WARN_ON(ctrl << 16 != state);
vlv_sideband_put(dev_priv);
- mutex_unlock(&dev_priv->pcu_lock);
return enabled;
}
@@ -1415,7 +1409,6 @@ static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv,
state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe);
- mutex_lock(&dev_priv->pcu_lock);
vlv_sideband_get(dev_priv);
#define COND \
@@ -1438,7 +1431,6 @@ static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv,
out:
vlv_sideband_put(dev_priv);
- mutex_unlock(&dev_priv->pcu_lock);
}
static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv,
@@ -118,8 +118,6 @@ u32 vlv_punit_read(struct drm_i915_private *dev_priv, u32 addr)
{
u32 val = 0;
- lockdep_assert_held(&dev_priv->pcu_lock);
-
vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
SB_CRRDDA_NP, addr, &val);
@@ -128,8 +126,6 @@ u32 vlv_punit_read(struct drm_i915_private *dev_priv, u32 addr)
int vlv_punit_write(struct drm_i915_private *dev_priv, u32 addr, u32 val)
{
- lockdep_assert_held(&dev_priv->pcu_lock);
-
return vlv_sideband_rw(dev_priv, PCI_DEVFN(0, 0), IOSF_PORT_PUNIT,
SB_CRWRDA_NP, addr, &val);
}
We now have two locks for sideband access. The general one covering sideband access across all generation, sb_lock, and a specific one covering sideband access via the punit on vlv/chv. After lifting the sb_lock around the punit into the callers, the pcu_lock is now redudant and can be separated from its other use to regulate RPS (essentially giving RPS a lock all of its own). Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> --- drivers/gpu/drm/i915/i915_debugfs.c | 52 +++++++------------ drivers/gpu/drm/i915/i915_drv.h | 10 +--- drivers/gpu/drm/i915/i915_irq.c | 4 +- drivers/gpu/drm/i915/i915_sysfs.c | 36 ++++++------- drivers/gpu/drm/i915/intel_cdclk.c | 24 --------- drivers/gpu/drm/i915/intel_display.c | 6 --- drivers/gpu/drm/i915/intel_hdcp.c | 2 - drivers/gpu/drm/i915/intel_pm.c | 92 +++++++++++++++++---------------- drivers/gpu/drm/i915/intel_runtime_pm.c | 8 --- drivers/gpu/drm/i915/intel_sideband.c | 4 -- 10 files changed, 86 insertions(+), 152 deletions(-)