Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes:
> sandybride_pcode is another sideband, so move it to their new home.
>
Up to this patch, omitting the waitboosting. Uptime 41min till
system hang on j1900.
With waitboosting patch it did survive without system hangs
for 24h+ but the frequency seemed to remain constant.
-Mika
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_drv.h | 5 -
> drivers/gpu/drm/i915/intel_hdcp.c | 3 +-
> drivers/gpu/drm/i915/intel_pm.c | 190 ----------------------------------
> drivers/gpu/drm/i915/intel_sideband.c | 190 ++++++++++++++++++++++++++++++++++
> drivers/gpu/drm/i915/intel_sideband.h | 5 +
> 5 files changed, 197 insertions(+), 196 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 4d9e9741ed8f..a0bb0f018a76 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -3706,11 +3706,6 @@ intel_display_capture_error_state(struct drm_i915_private *dev_priv);
> extern void intel_display_print_error_state(struct drm_i915_error_state_buf *e,
> struct intel_display_error_state *error);
>
> -int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val);
> -int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u32 mbox, u32 val);
> -int skl_pcode_request(struct drm_i915_private *dev_priv, u32 mbox, u32 request,
> - u32 reply_mask, u32 reply, int timeout_base_ms);
> -
> /* intel_dpio_phy.c */
> void bxt_port_to_phy_channel(struct drm_i915_private *dev_priv, enum port port,
> enum dpio_phy *phy, enum dpio_channel *ch);
> diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
> index d0e97172b8ed..1afae93707a1 100644
> --- a/drivers/gpu/drm/i915/intel_hdcp.c
> +++ b/drivers/gpu/drm/i915/intel_hdcp.c
> @@ -11,8 +11,9 @@
> #include <linux/i2c.h>
> #include <linux/random.h>
>
> -#include "intel_drv.h"
> #include "i915_reg.h"
> +#include "intel_drv.h"
> +#include "intel_sideband.h"
>
> #define KEY_LOAD_TRIES 5
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 18945264b835..a69b742147f7 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -9080,196 +9080,6 @@ void intel_init_pm(struct drm_i915_private *dev_priv)
> }
> }
>
> -static inline int gen6_check_mailbox_status(struct drm_i915_private *dev_priv)
> -{
> - uint32_t flags =
> - I915_READ_FW(GEN6_PCODE_MAILBOX) & GEN6_PCODE_ERROR_MASK;
> -
> - switch (flags) {
> - case GEN6_PCODE_SUCCESS:
> - return 0;
> - case GEN6_PCODE_UNIMPLEMENTED_CMD:
> - return -ENODEV;
> - case GEN6_PCODE_ILLEGAL_CMD:
> - return -ENXIO;
> - case GEN6_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE:
> - case GEN7_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE:
> - return -EOVERFLOW;
> - case GEN6_PCODE_TIMEOUT:
> - return -ETIMEDOUT;
> - default:
> - MISSING_CASE(flags);
> - return 0;
> - }
> -}
> -
> -static inline int gen7_check_mailbox_status(struct drm_i915_private *dev_priv)
> -{
> - uint32_t flags =
> - I915_READ_FW(GEN6_PCODE_MAILBOX) & GEN6_PCODE_ERROR_MASK;
> -
> - switch (flags) {
> - case GEN6_PCODE_SUCCESS:
> - return 0;
> - case GEN6_PCODE_ILLEGAL_CMD:
> - return -ENXIO;
> - case GEN7_PCODE_TIMEOUT:
> - return -ETIMEDOUT;
> - case GEN7_PCODE_ILLEGAL_DATA:
> - return -EINVAL;
> - case GEN7_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE:
> - return -EOVERFLOW;
> - default:
> - MISSING_CASE(flags);
> - return 0;
> - }
> -}
> -
> -static int __sandybridge_pcode_rw(struct drm_i915_private *dev_priv,
> - u32 mbox, u32 *val, bool is_read)
> -{
> - int status;
> -
> - 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
> - * required when reading/writing.
> - */
> -
> - if (I915_READ_FW(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY)
> - return -EAGAIN;
> -
> - I915_WRITE_FW(GEN6_PCODE_DATA, *val);
> - I915_WRITE_FW(GEN6_PCODE_DATA1, 0);
> - I915_WRITE_FW(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
> -
> - if (__intel_wait_for_register_fw(dev_priv,
> - GEN6_PCODE_MAILBOX, GEN6_PCODE_READY, 0,
> - 500, 0, NULL))
> - return -ETIMEDOUT;
> -
> - if (is_read)
> - *val = I915_READ_FW(GEN6_PCODE_DATA);
> - I915_WRITE_FW(GEN6_PCODE_DATA, 0);
> -
> - if (INTEL_GEN(dev_priv) > 6)
> - status = gen7_check_mailbox_status(dev_priv);
> - else
> - status = gen6_check_mailbox_status(dev_priv);
> -
> - return status;
> -}
> -
> -int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val)
> -{
> - int status;
> -
> - mutex_lock(&dev_priv->sb_lock);
> - status = __sandybridge_pcode_rw(dev_priv, mbox, val, true);
> - mutex_unlock(&dev_priv->sb_lock);
> -
> - if (status) {
> - DRM_DEBUG_DRIVER("warning: pcode (read from mbox %x) mailbox access failed for %ps: %d\n",
> - mbox, __builtin_return_address(0), status);
> - }
> -
> - return status;
> -}
> -
> -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_rw(dev_priv, mbox, &val, false);
> - mutex_unlock(&dev_priv->sb_lock);
> -
> - if (status) {
> - DRM_DEBUG_DRIVER("warning: pcode (write of 0x%08x to mbox %x) mailbox access failed for %ps: %d\n",
> - val, mbox, __builtin_return_address(0), status);
> - }
> -
> - 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)
> -{
> - *status = __sandybridge_pcode_rw(dev_priv, mbox, &request, true);
> -
> - return *status || ((request & reply_mask) == reply);
> -}
> -
> -/**
> - * skl_pcode_request - send PCODE request until acknowledgment
> - * @dev_priv: device private
> - * @mbox: PCODE mailbox ID the request is targeted for
> - * @request: request ID
> - * @reply_mask: mask used to check for request acknowledgment
> - * @reply: value used to check for request acknowledgment
> - * @timeout_base_ms: timeout for polling with preemption enabled
> - *
> - * Keep resending the @request to @mbox until PCODE acknowledges it, PCODE
> - * reports an error or an overall timeout of @timeout_base_ms+50 ms expires.
> - * The request is acknowledged once the PCODE reply dword equals @reply after
> - * applying @reply_mask. Polling is first attempted with preemption enabled
> - * for @timeout_base_ms and if this times out for another 50 ms with
> - * preemption disabled.
> - *
> - * Returns 0 on success, %-ETIMEDOUT in case of a timeout, <0 in case of some
> - * other error as reported by PCODE.
> - */
> -int skl_pcode_request(struct drm_i915_private *dev_priv, u32 mbox, u32 request,
> - u32 reply_mask, u32 reply, int timeout_base_ms)
> -{
> - u32 status;
> - int ret;
> -
> - mutex_lock(&dev_priv->sb_lock);
> -
> -#define COND skl_pcode_try_request(dev_priv, mbox, request, reply_mask, reply, \
> - &status)
> -
> - /*
> - * Prime the PCODE by doing a request first. Normally it guarantees
> - * that a subsequent request, at most @timeout_base_ms later, succeeds.
> - * _wait_for() doesn't guarantee when its passed condition is evaluated
> - * first, so send the first request explicitly.
> - */
> - if (COND) {
> - ret = 0;
> - goto out;
> - }
> - ret = _wait_for(COND, timeout_base_ms * 1000, 10, 10);
> - if (!ret)
> - goto out;
> -
> - /*
> - * The above can time out if the number of requests was low (2 in the
> - * worst case) _and_ PCODE was busy for some reason even after a
> - * (queued) request and @timeout_base_ms delay. As a workaround retry
> - * the poll with preemption disabled to maximize the number of
> - * requests. Increase the timeout from @timeout_base_ms to 50ms to
> - * account for interrupts that could reduce the number of these
> - * requests, and for any quirks of the PCODE firmware that delays
> - * the request completion.
> - */
> - DRM_DEBUG_KMS("PCODE timeout, retrying with preemption disabled\n");
> - WARN_ON_ONCE(timeout_base_ms > 3);
> - preempt_disable();
> - ret = wait_for_atomic(COND, 50);
> - preempt_enable();
> -
> -out:
> - mutex_unlock(&dev_priv->sb_lock);
> - return ret ? ret : status;
> -#undef COND
> -}
> -
> static int byt_gpu_freq(struct drm_i915_private *dev_priv, int val)
> {
> struct intel_rps *rps = &dev_priv->gt_pm.rps;
> diff --git a/drivers/gpu/drm/i915/intel_sideband.c b/drivers/gpu/drm/i915/intel_sideband.c
> index 6815be9e5b7c..a9ba378bf9fc 100644
> --- a/drivers/gpu/drm/i915/intel_sideband.c
> +++ b/drivers/gpu/drm/i915/intel_sideband.c
> @@ -383,3 +383,193 @@ void vlv_flisdsi_put(struct drm_i915_private *dev_priv)
> {
> vlv_iosf_sb_put(dev_priv, BIT(VLV_IOSF_SB_FLISDSI));
> }
> +
> +static inline int gen6_check_mailbox_status(struct drm_i915_private *dev_priv)
> +{
> + uint32_t flags =
> + I915_READ_FW(GEN6_PCODE_MAILBOX) & GEN6_PCODE_ERROR_MASK;
> +
> + switch (flags) {
> + case GEN6_PCODE_SUCCESS:
> + return 0;
> + case GEN6_PCODE_UNIMPLEMENTED_CMD:
> + return -ENODEV;
> + case GEN6_PCODE_ILLEGAL_CMD:
> + return -ENXIO;
> + case GEN6_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE:
> + case GEN7_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE:
> + return -EOVERFLOW;
> + case GEN6_PCODE_TIMEOUT:
> + return -ETIMEDOUT;
> + default:
> + MISSING_CASE(flags);
> + return 0;
> + }
> +}
> +
> +static inline int gen7_check_mailbox_status(struct drm_i915_private *dev_priv)
> +{
> + uint32_t flags =
> + I915_READ_FW(GEN6_PCODE_MAILBOX) & GEN6_PCODE_ERROR_MASK;
> +
> + switch (flags) {
> + case GEN6_PCODE_SUCCESS:
> + return 0;
> + case GEN6_PCODE_ILLEGAL_CMD:
> + return -ENXIO;
> + case GEN7_PCODE_TIMEOUT:
> + return -ETIMEDOUT;
> + case GEN7_PCODE_ILLEGAL_DATA:
> + return -EINVAL;
> + case GEN7_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE:
> + return -EOVERFLOW;
> + default:
> + MISSING_CASE(flags);
> + return 0;
> + }
> +}
> +
> +static int __sandybridge_pcode_rw(struct drm_i915_private *dev_priv,
> + u32 mbox, u32 *val, bool is_read)
> +{
> + int status;
> +
> + 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
> + * required when reading/writing.
> + */
> +
> + if (I915_READ_FW(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY)
> + return -EAGAIN;
> +
> + I915_WRITE_FW(GEN6_PCODE_DATA, *val);
> + I915_WRITE_FW(GEN6_PCODE_DATA1, 0);
> + I915_WRITE_FW(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
> +
> + if (__intel_wait_for_register_fw(dev_priv,
> + GEN6_PCODE_MAILBOX, GEN6_PCODE_READY, 0,
> + 500, 0, NULL))
> + return -ETIMEDOUT;
> +
> + if (is_read)
> + *val = I915_READ_FW(GEN6_PCODE_DATA);
> + I915_WRITE_FW(GEN6_PCODE_DATA, 0);
> +
> + if (INTEL_GEN(dev_priv) > 6)
> + status = gen7_check_mailbox_status(dev_priv);
> + else
> + status = gen6_check_mailbox_status(dev_priv);
> +
> + return status;
> +}
> +
> +int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val)
> +{
> + int status;
> +
> + mutex_lock(&dev_priv->sb_lock);
> + status = __sandybridge_pcode_rw(dev_priv, mbox, val, true);
> + mutex_unlock(&dev_priv->sb_lock);
> +
> + if (status) {
> + DRM_DEBUG_DRIVER("warning: pcode (read from mbox %x) mailbox access failed for %ps: %d\n",
> + mbox, __builtin_return_address(0), status);
> + }
> +
> + return status;
> +}
> +
> +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_rw(dev_priv, mbox, &val, false);
> + mutex_unlock(&dev_priv->sb_lock);
> +
> + if (status) {
> + DRM_DEBUG_DRIVER("warning: pcode (write of 0x%08x to mbox %x) mailbox access failed for %ps: %d\n",
> + val, mbox, __builtin_return_address(0), status);
> + }
> +
> + 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)
> +{
> + *status = __sandybridge_pcode_rw(dev_priv, mbox, &request, true);
> +
> + return *status || ((request & reply_mask) == reply);
> +}
> +
> +/**
> + * skl_pcode_request - send PCODE request until acknowledgment
> + * @dev_priv: device private
> + * @mbox: PCODE mailbox ID the request is targeted for
> + * @request: request ID
> + * @reply_mask: mask used to check for request acknowledgment
> + * @reply: value used to check for request acknowledgment
> + * @timeout_base_ms: timeout for polling with preemption enabled
> + *
> + * Keep resending the @request to @mbox until PCODE acknowledges it, PCODE
> + * reports an error or an overall timeout of @timeout_base_ms+50 ms expires.
> + * The request is acknowledged once the PCODE reply dword equals @reply after
> + * applying @reply_mask. Polling is first attempted with preemption enabled
> + * for @timeout_base_ms and if this times out for another 50 ms with
> + * preemption disabled.
> + *
> + * Returns 0 on success, %-ETIMEDOUT in case of a timeout, <0 in case of some
> + * other error as reported by PCODE.
> + */
> +int skl_pcode_request(struct drm_i915_private *dev_priv, u32 mbox, u32 request,
> + u32 reply_mask, u32 reply, int timeout_base_ms)
> +{
> + u32 status;
> + int ret;
> +
> + mutex_lock(&dev_priv->sb_lock);
> +
> +#define COND skl_pcode_try_request(dev_priv, mbox, request, reply_mask, reply, \
> + &status)
> +
> + /*
> + * Prime the PCODE by doing a request first. Normally it guarantees
> + * that a subsequent request, at most @timeout_base_ms later, succeeds.
> + * _wait_for() doesn't guarantee when its passed condition is evaluated
> + * first, so send the first request explicitly.
> + */
> + if (COND) {
> + ret = 0;
> + goto out;
> + }
> + ret = _wait_for(COND, timeout_base_ms * 1000, 10, 10);
> + if (!ret)
> + goto out;
> +
> + /*
> + * The above can time out if the number of requests was low (2 in the
> + * worst case) _and_ PCODE was busy for some reason even after a
> + * (queued) request and @timeout_base_ms delay. As a workaround retry
> + * the poll with preemption disabled to maximize the number of
> + * requests. Increase the timeout from @timeout_base_ms to 50ms to
> + * account for interrupts that could reduce the number of these
> + * requests, and for any quirks of the PCODE firmware that delays
> + * the request completion.
> + */
> + DRM_DEBUG_KMS("PCODE timeout, retrying with preemption disabled\n");
> + WARN_ON_ONCE(timeout_base_ms > 3);
> + preempt_disable();
> + ret = wait_for_atomic(COND, 50);
> + preempt_enable();
> +
> +out:
> + mutex_unlock(&dev_priv->sb_lock);
> + return ret ? ret : status;
> +#undef COND
> +}
> diff --git a/drivers/gpu/drm/i915/intel_sideband.h b/drivers/gpu/drm/i915/intel_sideband.h
> index 46e917dd3973..999c1da2cd93 100644
> --- a/drivers/gpu/drm/i915/intel_sideband.h
> +++ b/drivers/gpu/drm/i915/intel_sideband.h
> @@ -68,4 +68,9 @@ u32 intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg,
> void intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value,
> enum intel_sbi_destination destination);
>
> +int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val);
> +int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u32 mbox, u32 val);
> +int skl_pcode_request(struct drm_i915_private *dev_priv, u32 mbox, u32 request,
> + u32 reply_mask, u32 reply, int timeout_base_ms);
> +
> #endif /* _INTEL_SIDEBAND_H */
> --
> 2.15.1
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