drm/amdgpu: Add prescreening stage in IH processing (v2)

To filter out high-frequency interrupts that can be safely ignored.

v2: squash in trivial typo fix for si (Alex)

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 802fdc1..d62a35e 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -334,6 +334,7 @@ struct amdgpu_gart_funcs {
 struct amdgpu_ih_funcs {
        /* ring read/write ptr handling, called from interrupt context */
        u32 (*get_wptr)(struct amdgpu_device *adev);
+       bool (*prescreen_iv)(struct amdgpu_device *adev);
        void (*decode_iv)(struct amdgpu_device *adev,
                          struct amdgpu_iv_entry *entry);
        void (*set_rptr)(struct amdgpu_device *adev);
@@ -1749,6 +1750,7 @@ amdgpu_get_sdma_instance(struct amdgpu_ring *ring)
 #define amdgpu_ring_init_cond_exec(r) (r)->funcs->init_cond_exec((r))
 #define amdgpu_ring_patch_cond_exec(r,o) (r)->funcs->patch_cond_exec((r),(o))
 #define amdgpu_ih_get_wptr(adev) (adev)->irq.ih_funcs->get_wptr((adev))
+#define amdgpu_ih_prescreen_iv(adev) (adev)->irq.ih_funcs->prescreen_iv((adev))
 #define amdgpu_ih_decode_iv(adev, iv) (adev)->irq.ih_funcs->decode_iv((adev), (iv))
 #define amdgpu_ih_set_rptr(adev) (adev)->irq.ih_funcs->set_rptr((adev))
 #define amdgpu_display_vblank_get_counter(adev, crtc) (adev)->mode_info.funcs->vblank_get_counter((adev), (crtc))

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c
index 3ab4c65..c834a40 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c
@@ -169,6 +169,12 @@ restart_ih:
        while (adev->irq.ih.rptr != wptr) {
                u32 ring_index = adev->irq.ih.rptr >> 2;
 
+               /* Prescreening of high-frequency interrupts */
+               if (!amdgpu_ih_prescreen_iv(adev)) {
+                       adev->irq.ih.rptr &= adev->irq.ih.ptr_mask;
+                       continue;
+               }
+
                /* Before dispatching irq to IP blocks, send it to amdkfd */
                amdgpu_amdkfd_interrupt(adev,
                                (const void *) &adev->irq.ih.ring[ring_index]);

diff --git a/drivers/gpu/drm/amd/amdgpu/cik_ih.c b/drivers/gpu/drm/amd/amdgpu/cik_ih.c
index b891843..07d3d89 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/cik_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/cik_ih.c
@@ -228,6 +228,19 @@ static u32 cik_ih_get_wptr(struct amdgpu_device *adev)
  * [127:96] - reserved
  */
 
+/**
+ * cik_ih_prescreen_iv - prescreen an interrupt vector
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Returns true if the interrupt vector should be further processed.
+ */
+static bool cik_ih_prescreen_iv(struct amdgpu_device *adev)
+{
+       /* Process all interrupts */
+       return true;
+}
+
  /**
  * cik_ih_decode_iv - decode an interrupt vector
  *
@@ -433,6 +446,7 @@ static const struct amd_ip_funcs cik_ih_ip_funcs = {
 
 static const struct amdgpu_ih_funcs cik_ih_funcs = {
        .get_wptr = cik_ih_get_wptr,
+       .prescreen_iv = cik_ih_prescreen_iv,
        .decode_iv = cik_ih_decode_iv,
        .set_rptr = cik_ih_set_rptr
 };

diff --git a/drivers/gpu/drm/amd/amdgpu/cz_ih.c b/drivers/gpu/drm/amd/amdgpu/cz_ih.c
index 0c1209c..b6cdf4a 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/cz_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/cz_ih.c
@@ -208,6 +208,19 @@ static u32 cz_ih_get_wptr(struct amdgpu_device *adev)
 }
 
 /**
+ * cz_ih_prescreen_iv - prescreen an interrupt vector
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Returns true if the interrupt vector should be further processed.
+ */
+static bool cz_ih_prescreen_iv(struct amdgpu_device *adev)
+{
+       /* Process all interrupts */
+       return true;
+}
+
+/**
  * cz_ih_decode_iv - decode an interrupt vector
  *
  * @adev: amdgpu_device pointer
@@ -414,6 +427,7 @@ static const struct amd_ip_funcs cz_ih_ip_funcs = {
 
 static const struct amdgpu_ih_funcs cz_ih_funcs = {
        .get_wptr = cz_ih_get_wptr,
+       .prescreen_iv = cz_ih_prescreen_iv,
        .decode_iv = cz_ih_decode_iv,
        .set_rptr = cz_ih_set_rptr
 };

diff --git a/drivers/gpu/drm/amd/amdgpu/iceland_ih.c b/drivers/gpu/drm/amd/amdgpu/iceland_ih.c
index 7a0ea27..65ed6d3 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/iceland_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/iceland_ih.c
@@ -208,6 +208,19 @@ static u32 iceland_ih_get_wptr(struct amdgpu_device *adev)
 }
 
 /**
+ * iceland_ih_prescreen_iv - prescreen an interrupt vector
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Returns true if the interrupt vector should be further processed.
+ */
+static bool iceland_ih_prescreen_iv(struct amdgpu_device *adev)
+{
+       /* Process all interrupts */
+       return true;
+}
+
+/**
  * iceland_ih_decode_iv - decode an interrupt vector
  *
  * @adev: amdgpu_device pointer
@@ -412,6 +425,7 @@ static const struct amd_ip_funcs iceland_ih_ip_funcs = {
 
 static const struct amdgpu_ih_funcs iceland_ih_funcs = {
        .get_wptr = iceland_ih_get_wptr,
+       .prescreen_iv = iceland_ih_prescreen_iv,
        .decode_iv = iceland_ih_decode_iv,
        .set_rptr = iceland_ih_set_rptr
 };

diff --git a/drivers/gpu/drm/amd/amdgpu/si_ih.c b/drivers/gpu/drm/amd/amdgpu/si_ih.c
index ce25e03..d2c6b80 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/si_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/si_ih.c
@@ -118,6 +118,19 @@ static u32 si_ih_get_wptr(struct amdgpu_device *adev)
        return (wptr & adev->irq.ih.ptr_mask);
 }
 
+/**
+ * si_ih_prescreen_iv - prescreen an interrupt vector
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Returns true if the interrupt vector should be further processed.
+ */
+static bool si_ih_prescreen_iv(struct amdgpu_device *adev)
+{
+       /* Process all interrupts */
+       return true;
+}
+
 static void si_ih_decode_iv(struct amdgpu_device *adev,
                             struct amdgpu_iv_entry *entry)
 {
@@ -288,6 +301,7 @@ static const struct amd_ip_funcs si_ih_ip_funcs = {
 
 static const struct amdgpu_ih_funcs si_ih_funcs = {
        .get_wptr = si_ih_get_wptr,
+       .prescreen_iv = si_ih_prescreen_iv,
        .decode_iv = si_ih_decode_iv,
        .set_rptr = si_ih_set_rptr
 };

diff --git a/drivers/gpu/drm/amd/amdgpu/tonga_ih.c b/drivers/gpu/drm/amd/amdgpu/tonga_ih.c
index 923df2c..5ed0069 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/tonga_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/tonga_ih.c
@@ -219,6 +219,19 @@ static u32 tonga_ih_get_wptr(struct amdgpu_device *adev)
 }
 
 /**
+ * tonga_ih_prescreen_iv - prescreen an interrupt vector
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Returns true if the interrupt vector should be further processed.
+ */
+static bool tonga_ih_prescreen_iv(struct amdgpu_device *adev)
+{
+       /* Process all interrupts */
+       return true;
+}
+
+/**
  * tonga_ih_decode_iv - decode an interrupt vector
  *
  * @adev: amdgpu_device pointer
@@ -478,6 +491,7 @@ static const struct amd_ip_funcs tonga_ih_ip_funcs = {
 
 static const struct amdgpu_ih_funcs tonga_ih_funcs = {
        .get_wptr = tonga_ih_get_wptr,
+       .prescreen_iv = tonga_ih_prescreen_iv,
        .decode_iv = tonga_ih_decode_iv,
        .set_rptr = tonga_ih_set_rptr
 };

diff --git a/drivers/gpu/drm/amd/amdgpu/vega10_ih.c b/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
index 56150e8..eda4771 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
@@ -227,6 +227,19 @@ static u32 vega10_ih_get_wptr(struct amdgpu_device *adev)
 }
 
 /**
+ * vega10_ih_prescreen_iv - prescreen an interrupt vector
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Returns true if the interrupt vector should be further processed.
+ */
+static bool vega10_ih_prescreen_iv(struct amdgpu_device *adev)
+{
+       /* TODO: Filter known pending page faults */
+       return true;
+}
+
+/**
  * vega10_ih_decode_iv - decode an interrupt vector
  *
  * @adev: amdgpu_device pointer
@@ -410,6 +423,7 @@ const struct amd_ip_funcs vega10_ih_ip_funcs = {
 
 static const struct amdgpu_ih_funcs vega10_ih_funcs = {
        .get_wptr = vega10_ih_get_wptr,
+       .prescreen_iv = vega10_ih_prescreen_iv,
        .decode_iv = vega10_ih_decode_iv,
        .set_rptr = vega10_ih_set_rptr
 };