* [PATCH v7 0/6] drm/i915: expose RCS topology to userspace
@ 2018-01-16 19:18 Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 1/6] drm/i915: store all subslice masks Lionel Landwerlin
` (7 more replies)
0 siblings, 8 replies; 14+ messages in thread
From: Lionel Landwerlin @ 2018-01-16 19:18 UTC (permalink / raw)
To: intel-gfx
A few tweaks following comments from Chris.
Cheers,
Lionel Landwerlin (6):
drm/i915: store all subslice masks
drm/i915/debugfs: reuse max slice/subslices already stored in sseu
drm/i915/debugfs: add rcs topology entry
drm/i915: add rcs topology to error state
drm/i915: add query uAPI
drm/i915: expose rcs topology through query uAPI
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/i915_debugfs.c | 63 +++++----
drivers/gpu/drm/i915/i915_drv.c | 3 +-
drivers/gpu/drm/i915/i915_drv.h | 3 +
drivers/gpu/drm/i915/i915_gpu_error.c | 1 +
drivers/gpu/drm/i915/i915_query.c | 163 ++++++++++++++++++++++
drivers/gpu/drm/i915/intel_device_info.c | 226 ++++++++++++++++++++++++-------
drivers/gpu/drm/i915/intel_device_info.h | 49 ++++++-
drivers/gpu/drm/i915/intel_lrc.c | 2 +-
drivers/gpu/drm/i915/intel_ringbuffer.h | 2 +-
include/uapi/drm/i915_drm.h | 100 ++++++++++++++
11 files changed, 534 insertions(+), 79 deletions(-)
create mode 100644 drivers/gpu/drm/i915/i915_query.c
--
2.15.1
_______________________________________________
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Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH v7 1/6] drm/i915: store all subslice masks
2018-01-16 19:18 [PATCH v7 0/6] drm/i915: expose RCS topology to userspace Lionel Landwerlin
@ 2018-01-16 19:18 ` Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 2/6] drm/i915/debugfs: reuse max slice/subslices already stored in sseu Lionel Landwerlin
` (6 subsequent siblings)
7 siblings, 0 replies; 14+ messages in thread
From: Lionel Landwerlin @ 2018-01-16 19:18 UTC (permalink / raw)
To: intel-gfx
Up to now, subslice mask was assumed to be uniform across slices. But
starting with Cannonlake, slices can be asymmetric (for example slice0
has different number of subslices as slice1+). This change stores all
subslices masks for all slices rather than having a single mask that
applies to all slices.
v2: Rework how we store total numbers in sseu_dev_info (Tvrtko)
Fix CHV eu masks, was reading disabled as enabled (Tvrtko)
Readability changes (Tvrtko)
Add EU index helper (Tvrtko)
v3: Turn ALIGN(v, 8) / 8 into DIV_ROUND_UP(v, BITS_PER_BYTE) (Tvrtko)
Reuse sseu_eu_idx() for setting eu_mask on CHV (Tvrtko)
Reformat debug prints for subslices (Tvrtko)
v4: Change eu_mask helper into sseu_set_eus() (Tvrtko)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
drivers/gpu/drm/i915/i915_debugfs.c | 25 ++--
drivers/gpu/drm/i915/i915_drv.c | 2 +-
drivers/gpu/drm/i915/intel_device_info.c | 201 +++++++++++++++++++++++--------
drivers/gpu/drm/i915/intel_device_info.h | 47 +++++++-
drivers/gpu/drm/i915/intel_lrc.c | 2 +-
drivers/gpu/drm/i915/intel_ringbuffer.h | 2 +-
6 files changed, 216 insertions(+), 63 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index cc659b4b2a45..684551114965 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4289,7 +4289,7 @@ static void cherryview_sseu_device_status(struct drm_i915_private *dev_priv,
continue;
sseu->slice_mask = BIT(0);
- sseu->subslice_mask |= BIT(ss);
+ sseu->subslice_mask[0] |= BIT(ss);
eu_cnt = ((sig1[ss] & CHV_EU08_PG_ENABLE) ? 0 : 2) +
((sig1[ss] & CHV_EU19_PG_ENABLE) ? 0 : 2) +
((sig1[ss] & CHV_EU210_PG_ENABLE) ? 0 : 2) +
@@ -4336,7 +4336,7 @@ static void gen10_sseu_device_status(struct drm_i915_private *dev_priv,
continue;
sseu->slice_mask |= BIT(s);
- sseu->subslice_mask = info->sseu.subslice_mask;
+ sseu->subslice_mask[s] = info->sseu.subslice_mask[s];
for (ss = 0; ss < ss_max; ss++) {
unsigned int eu_cnt;
@@ -4391,8 +4391,8 @@ static void gen9_sseu_device_status(struct drm_i915_private *dev_priv,
sseu->slice_mask |= BIT(s);
if (IS_GEN9_BC(dev_priv))
- sseu->subslice_mask =
- INTEL_INFO(dev_priv)->sseu.subslice_mask;
+ sseu->subslice_mask[s] =
+ INTEL_INFO(dev_priv)->sseu.subslice_mask[s];
for (ss = 0; ss < ss_max; ss++) {
unsigned int eu_cnt;
@@ -4402,7 +4402,7 @@ static void gen9_sseu_device_status(struct drm_i915_private *dev_priv,
/* skip disabled subslice */
continue;
- sseu->subslice_mask |= BIT(ss);
+ sseu->subslice_mask[s] |= BIT(ss);
}
eu_cnt = 2 * hweight32(eu_reg[2*s + ss/2] &
@@ -4424,9 +4424,12 @@ static void broadwell_sseu_device_status(struct drm_i915_private *dev_priv,
sseu->slice_mask = slice_info & GEN8_LSLICESTAT_MASK;
if (sseu->slice_mask) {
- sseu->subslice_mask = INTEL_INFO(dev_priv)->sseu.subslice_mask;
sseu->eu_per_subslice =
INTEL_INFO(dev_priv)->sseu.eu_per_subslice;
+ for (s = 0; s < fls(sseu->slice_mask); s++) {
+ sseu->subslice_mask[s] =
+ INTEL_INFO(dev_priv)->sseu.subslice_mask[s];
+ }
sseu->eu_total = sseu->eu_per_subslice *
sseu_subslice_total(sseu);
@@ -4445,6 +4448,7 @@ static void i915_print_sseu_info(struct seq_file *m, bool is_available_info,
{
struct drm_i915_private *dev_priv = node_to_i915(m->private);
const char *type = is_available_info ? "Available" : "Enabled";
+ int s;
seq_printf(m, " %s Slice Mask: %04x\n", type,
sseu->slice_mask);
@@ -4452,10 +4456,11 @@ static void i915_print_sseu_info(struct seq_file *m, bool is_available_info,
hweight8(sseu->slice_mask));
seq_printf(m, " %s Subslice Total: %u\n", type,
sseu_subslice_total(sseu));
- seq_printf(m, " %s Subslice Mask: %04x\n", type,
- sseu->subslice_mask);
- seq_printf(m, " %s Subslice Per Slice: %u\n", type,
- hweight8(sseu->subslice_mask));
+ for (s = 0; s < fls(sseu->slice_mask); s++) {
+ seq_printf(m, " %s Slice%i %u subslices, mask=%04x\n", type,
+ s, hweight8(sseu->subslice_mask[s]),
+ sseu->subslice_mask[s]);
+ }
seq_printf(m, " %s EU Total: %u\n", type,
sseu->eu_total);
seq_printf(m, " %s EU Per Subslice: %u\n", type,
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 6c8da9d20c33..969835d3cbcd 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -414,7 +414,7 @@ static int i915_getparam(struct drm_device *dev, void *data,
return -ENODEV;
break;
case I915_PARAM_SUBSLICE_MASK:
- value = INTEL_INFO(dev_priv)->sseu.subslice_mask;
+ value = INTEL_INFO(dev_priv)->sseu.subslice_mask[0];
if (!value)
return -ENODEV;
break;
diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index d28592e43512..ed14994527fc 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -80,12 +80,16 @@ void intel_device_info_dump_flags(const struct intel_device_info *info,
static void sseu_dump(const struct sseu_dev_info *sseu, struct drm_printer *p)
{
+ int s;
+
drm_printf(p, "slice mask: %04x\n", sseu->slice_mask);
drm_printf(p, "slice total: %u\n", hweight8(sseu->slice_mask));
drm_printf(p, "subslice total: %u\n", sseu_subslice_total(sseu));
- drm_printf(p, "subslice mask %04x\n", sseu->subslice_mask);
- drm_printf(p, "subslice per slice: %u\n",
- hweight8(sseu->subslice_mask));
+ for (s = 0; s < ARRAY_SIZE(sseu->subslice_mask); s++) {
+ drm_printf(p, "slice%d %u subslices mask=%04x\n",
+ s, hweight8(sseu->subslice_mask[s]),
+ sseu->subslice_mask[s]);
+ }
drm_printf(p, "EU total: %u\n", sseu->eu_total);
drm_printf(p, "EU per subslice: %u\n", sseu->eu_per_subslice);
drm_printf(p, "has slice power gating: %s\n",
@@ -119,22 +123,87 @@ void intel_device_info_dump(const struct intel_device_info *info,
intel_device_info_dump_flags(info, p);
}
+static u16 compute_eu_total(const struct sseu_dev_info *sseu)
+{
+ u16 i, total = 0;
+
+ for (i = 0; i < ARRAY_SIZE(sseu->eu_mask); i++)
+ total += hweight8(sseu->eu_mask[i]);
+
+ return total;
+}
+
+static u16 compute_subslice_total(const struct sseu_dev_info *sseu)
+{
+ u16 i, total = 0;
+
+ for (i = 0; i < ARRAY_SIZE(sseu->subslice_mask); i++)
+ total += hweight8(sseu->subslice_mask[i]);
+
+ return total;
+}
+
static void gen10_sseu_info_init(struct drm_i915_private *dev_priv)
{
struct sseu_dev_info *sseu = &mkwrite_device_info(dev_priv)->sseu;
const u32 fuse2 = I915_READ(GEN8_FUSE2);
+ int s, ss;
+ const int eu_mask = 0xff;
+ u32 subslice_mask, eu_en;
sseu->slice_mask = (fuse2 & GEN10_F2_S_ENA_MASK) >>
GEN10_F2_S_ENA_SHIFT;
- sseu->subslice_mask = (1 << 4) - 1;
- sseu->subslice_mask &= ~((fuse2 & GEN10_F2_SS_DIS_MASK) >>
- GEN10_F2_SS_DIS_SHIFT);
+ sseu->max_slices = 6;
+ sseu->max_subslices = 4;
+ sseu->max_eus_per_subslice = 8;
- sseu->eu_total = hweight32(~I915_READ(GEN8_EU_DISABLE0));
- sseu->eu_total += hweight32(~I915_READ(GEN8_EU_DISABLE1));
- sseu->eu_total += hweight32(~I915_READ(GEN8_EU_DISABLE2));
- sseu->eu_total += hweight8(~(I915_READ(GEN10_EU_DISABLE3) &
- GEN10_EU_DIS_SS_MASK));
+ subslice_mask = (1 << 4) - 1;
+ subslice_mask &= ~((fuse2 & GEN10_F2_SS_DIS_MASK) >>
+ GEN10_F2_SS_DIS_SHIFT);
+
+ /*
+ * Slice0 can have up to 3 subslices, but there are only 2 in
+ * slice1/2.
+ */
+ sseu->subslice_mask[0] = subslice_mask;
+ for (s = 1; s < sseu->max_slices; s++)
+ sseu->subslice_mask[s] = subslice_mask & 0x3;
+
+ /* Slice0 */
+ eu_en = ~I915_READ(GEN8_EU_DISABLE0);
+ for (ss = 0; ss < sseu->max_subslices; ss++)
+ sseu_set_eus(sseu, 0, ss, (eu_en >> (8 * ss)) & eu_mask);
+ /* Slice1 */
+ sseu_set_eus(sseu, 1, 0, (eu_en >> 24) & eu_mask);
+ eu_en = ~I915_READ(GEN8_EU_DISABLE1);
+ sseu_set_eus(sseu, 1, 1, eu_en & eu_mask);
+ /* Slice2 */
+ sseu_set_eus(sseu, 2, 0, (eu_en >> 8) & eu_mask);
+ sseu_set_eus(sseu, 2, 1, (eu_en >> 16) & eu_mask);
+ /* Slice3 */
+ sseu_set_eus(sseu, 3, 0, (eu_en >> 24) & eu_mask);
+ eu_en = ~I915_READ(GEN8_EU_DISABLE2);
+ sseu_set_eus(sseu, 3, 1, eu_en & eu_mask);
+ /* Slice4 */
+ sseu_set_eus(sseu, 4, 0, (eu_en >> 8) & eu_mask);
+ sseu_set_eus(sseu, 4, 1, (eu_en >> 16) & eu_mask);
+ /* Slice5 */
+ sseu_set_eus(sseu, 5, 0, (eu_en >> 24) & eu_mask);
+ eu_en = ~I915_READ(GEN10_EU_DISABLE3);
+ sseu_set_eus(sseu, 5, 1, eu_en & eu_mask);
+
+ /* Do a second pass where we mark the subslices disabled if all their
+ * eus are off.
+ */
+ for (s = 0; s < sseu->max_slices; s++) {
+ for (ss = 0; ss < sseu->max_subslices; ss++) {
+ if (sseu_get_eus(sseu, s, ss) == 0)
+ sseu->subslice_mask[s] &= ~BIT(ss);
+ }
+ }
+
+ sseu->subslice_total = compute_subslice_total(sseu);
+ sseu->eu_total = compute_eu_total(sseu);
/*
* CNL is expected to always have a uniform distribution
@@ -155,26 +224,40 @@ static void gen10_sseu_info_init(struct drm_i915_private *dev_priv)
static void cherryview_sseu_info_init(struct drm_i915_private *dev_priv)
{
struct sseu_dev_info *sseu = &mkwrite_device_info(dev_priv)->sseu;
- u32 fuse, eu_dis;
+ u32 fuse;
fuse = I915_READ(CHV_FUSE_GT);
sseu->slice_mask = BIT(0);
+ sseu->max_slices = 1;
+ sseu->max_subslices = 2;
+ sseu->max_eus_per_subslice = 8;
if (!(fuse & CHV_FGT_DISABLE_SS0)) {
- sseu->subslice_mask |= BIT(0);
- eu_dis = fuse & (CHV_FGT_EU_DIS_SS0_R0_MASK |
- CHV_FGT_EU_DIS_SS0_R1_MASK);
- sseu->eu_total += 8 - hweight32(eu_dis);
+ u8 disabled_mask =
+ ((fuse & CHV_FGT_EU_DIS_SS0_R0_MASK) >>
+ CHV_FGT_EU_DIS_SS0_R0_SHIFT) |
+ (((fuse & CHV_FGT_EU_DIS_SS0_R1_MASK) >>
+ CHV_FGT_EU_DIS_SS0_R1_SHIFT) << 4);
+
+ sseu->subslice_mask[0] |= BIT(0);
+ sseu_set_eus(sseu, 0, 0, ~disabled_mask);
}
if (!(fuse & CHV_FGT_DISABLE_SS1)) {
- sseu->subslice_mask |= BIT(1);
- eu_dis = fuse & (CHV_FGT_EU_DIS_SS1_R0_MASK |
- CHV_FGT_EU_DIS_SS1_R1_MASK);
- sseu->eu_total += 8 - hweight32(eu_dis);
+ u8 disabled_mask =
+ ((fuse & CHV_FGT_EU_DIS_SS1_R0_MASK) >>
+ CHV_FGT_EU_DIS_SS1_R0_SHIFT) |
+ (((fuse & CHV_FGT_EU_DIS_SS1_R1_MASK) >>
+ CHV_FGT_EU_DIS_SS1_R1_SHIFT) << 4);
+
+ sseu->subslice_mask[0] |= BIT(1);
+ sseu_set_eus(sseu, 0, 1, ~disabled_mask);
}
+ sseu->subslice_total = compute_subslice_total(sseu);
+ sseu->eu_total = compute_eu_total(sseu);
+
/*
* CHV expected to always have a uniform distribution of EU
* across subslices.
@@ -196,41 +279,52 @@ static void gen9_sseu_info_init(struct drm_i915_private *dev_priv)
{
struct intel_device_info *info = mkwrite_device_info(dev_priv);
struct sseu_dev_info *sseu = &info->sseu;
- int s_max = 3, ss_max = 4, eu_max = 8;
int s, ss;
- u32 fuse2, eu_disable;
- u8 eu_mask = 0xff;
+ u32 fuse2, eu_disable, subslice_mask;
+ const u8 eu_mask = 0xff;
fuse2 = I915_READ(GEN8_FUSE2);
sseu->slice_mask = (fuse2 & GEN8_F2_S_ENA_MASK) >> GEN8_F2_S_ENA_SHIFT;
+ /* BXT has a single slice and at most 3 subslices. */
+ sseu->max_slices = IS_GEN9_LP(dev_priv) ? 1 : 3;
+ sseu->max_subslices = IS_GEN9_LP(dev_priv) ? 3 : 4;
+ sseu->max_eus_per_subslice = 8;
+
/*
* The subslice disable field is global, i.e. it applies
* to each of the enabled slices.
*/
- sseu->subslice_mask = (1 << ss_max) - 1;
- sseu->subslice_mask &= ~((fuse2 & GEN9_F2_SS_DIS_MASK) >>
- GEN9_F2_SS_DIS_SHIFT);
+ subslice_mask = (1 << sseu->max_subslices) - 1;
+ subslice_mask &= ~((fuse2 & GEN9_F2_SS_DIS_MASK) >>
+ GEN9_F2_SS_DIS_SHIFT);
/*
* Iterate through enabled slices and subslices to
* count the total enabled EU.
*/
- for (s = 0; s < s_max; s++) {
+ for (s = 0; s < sseu->max_slices; s++) {
if (!(sseu->slice_mask & BIT(s)))
/* skip disabled slice */
continue;
+ sseu->subslice_mask[s] = subslice_mask;
+
eu_disable = I915_READ(GEN9_EU_DISABLE(s));
- for (ss = 0; ss < ss_max; ss++) {
+ for (ss = 0; ss < sseu->max_subslices; ss++) {
int eu_per_ss;
+ u8 eu_disabled_mask;
- if (!(sseu->subslice_mask & BIT(ss)))
+ if (!(sseu->subslice_mask[s] & BIT(ss)))
/* skip disabled subslice */
continue;
- eu_per_ss = eu_max - hweight8((eu_disable >> (ss*8)) &
- eu_mask);
+ eu_disabled_mask = (eu_disable >> (ss*8)) & eu_mask;
+
+ sseu_set_eus(sseu, s, ss, ~eu_disabled_mask);
+
+ eu_per_ss = sseu->max_eus_per_subslice -
+ hweight8(eu_disabled_mask);
/*
* Record which subslice(s) has(have) 7 EUs. we
@@ -239,11 +333,12 @@ static void gen9_sseu_info_init(struct drm_i915_private *dev_priv)
*/
if (eu_per_ss == 7)
sseu->subslice_7eu[s] |= BIT(ss);
-
- sseu->eu_total += eu_per_ss;
}
}
+ sseu->subslice_total = compute_subslice_total(sseu);
+ sseu->eu_total = compute_eu_total(sseu);
+
/*
* SKL is expected to always have a uniform distribution
* of EU across subslices with the exception that any one
@@ -269,8 +364,8 @@ static void gen9_sseu_info_init(struct drm_i915_private *dev_priv)
sseu->has_eu_pg = sseu->eu_per_subslice > 2;
if (IS_GEN9_LP(dev_priv)) {
-#define IS_SS_DISABLED(ss) (!(sseu->subslice_mask & BIT(ss)))
- info->has_pooled_eu = hweight8(sseu->subslice_mask) == 3;
+#define IS_SS_DISABLED(ss) (!(sseu->subslice_mask[0] & BIT(ss)))
+ info->has_pooled_eu = hweight8(sseu->subslice_mask[0]) == 3;
sseu->min_eu_in_pool = 0;
if (info->has_pooled_eu) {
@@ -288,19 +383,22 @@ static void gen9_sseu_info_init(struct drm_i915_private *dev_priv)
static void broadwell_sseu_info_init(struct drm_i915_private *dev_priv)
{
struct sseu_dev_info *sseu = &mkwrite_device_info(dev_priv)->sseu;
- const int s_max = 3, ss_max = 3, eu_max = 8;
int s, ss;
- u32 fuse2, eu_disable[3]; /* s_max */
+ u32 fuse2, subslice_mask, eu_disable[3]; /* s_max */
fuse2 = I915_READ(GEN8_FUSE2);
sseu->slice_mask = (fuse2 & GEN8_F2_S_ENA_MASK) >> GEN8_F2_S_ENA_SHIFT;
+ sseu->max_slices = 3;
+ sseu->max_subslices = 3;
+ sseu->max_eus_per_subslice = 8;
+
/*
* The subslice disable field is global, i.e. it applies
* to each of the enabled slices.
*/
- sseu->subslice_mask = GENMASK(ss_max - 1, 0);
- sseu->subslice_mask &= ~((fuse2 & GEN8_F2_SS_DIS_MASK) >>
- GEN8_F2_SS_DIS_SHIFT);
+ subslice_mask = GENMASK(sseu->max_subslices - 1, 0);
+ subslice_mask &= ~((fuse2 & GEN8_F2_SS_DIS_MASK) >>
+ GEN8_F2_SS_DIS_SHIFT);
eu_disable[0] = I915_READ(GEN8_EU_DISABLE0) & GEN8_EU_DIS0_S0_MASK;
eu_disable[1] = (I915_READ(GEN8_EU_DISABLE0) >> GEN8_EU_DIS0_S1_SHIFT) |
@@ -314,30 +412,39 @@ static void broadwell_sseu_info_init(struct drm_i915_private *dev_priv)
* Iterate through enabled slices and subslices to
* count the total enabled EU.
*/
- for (s = 0; s < s_max; s++) {
+ for (s = 0; s < sseu->max_slices; s++) {
if (!(sseu->slice_mask & BIT(s)))
/* skip disabled slice */
continue;
- for (ss = 0; ss < ss_max; ss++) {
+ sseu->subslice_mask[s] = subslice_mask;
+
+ for (ss = 0; ss < sseu->max_subslices; ss++) {
+ u8 eu_disabled_mask;
u32 n_disabled;
- if (!(sseu->subslice_mask & BIT(ss)))
+ if (!(sseu->subslice_mask[ss] & BIT(ss)))
/* skip disabled subslice */
continue;
- n_disabled = hweight8(eu_disable[s] >> (ss * eu_max));
+ eu_disabled_mask =
+ eu_disable[s] >> (ss * sseu->max_eus_per_subslice);
+
+ sseu_set_eus(sseu, s, ss, ~eu_disabled_mask);
+
+ n_disabled = hweight8(eu_disabled_mask);
/*
* Record which subslices have 7 EUs.
*/
- if (eu_max - n_disabled == 7)
+ if (sseu->max_eus_per_subslice - n_disabled == 7)
sseu->subslice_7eu[s] |= 1 << ss;
-
- sseu->eu_total += eu_max - n_disabled;
}
}
+ sseu->subslice_total = compute_subslice_total(sseu);
+ sseu->eu_total = compute_eu_total(sseu);
+
/*
* BDW is expected to always have a uniform distribution of EU across
* subslices with the exception that any one EU in any one subslice may
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index 49cb27bd04c1..36e0df87862d 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -110,10 +110,14 @@ enum intel_platform {
func(supports_tv); \
func(has_ipc);
+#define GEN_MAX_SLICES (6) /* CNL upper bound */
+#define GEN_MAX_SUBSLICES (7)
+
struct sseu_dev_info {
u8 slice_mask;
- u8 subslice_mask;
- u8 eu_total;
+ u8 subslice_mask[GEN_MAX_SUBSLICES];
+ u16 subslice_total;
+ u16 eu_total;
u8 eu_per_subslice;
u8 min_eu_in_pool;
/* For each slice, which subslice(s) has(have) 7 EUs (bitfield)? */
@@ -121,6 +125,17 @@ struct sseu_dev_info {
u8 has_slice_pg:1;
u8 has_subslice_pg:1;
u8 has_eu_pg:1;
+
+ /* Topology fields */
+ u8 max_slices;
+ u8 max_subslices;
+ u8 max_eus_per_subslice;
+
+ /* We don't have more than 8 eus per subslice at the moment and as we
+ * store eus enabled using bits, no need to multiply by eus per
+ * subslice.
+ */
+ u8 eu_mask[GEN_MAX_SLICES * GEN_MAX_SUBSLICES];
};
struct intel_device_info {
@@ -167,7 +182,33 @@ struct intel_device_info {
static inline unsigned int sseu_subslice_total(const struct sseu_dev_info *sseu)
{
- return hweight8(sseu->slice_mask) * hweight8(sseu->subslice_mask);
+ return sseu->subslice_total;
+}
+
+static inline int sseu_eu_idx(const struct sseu_dev_info *sseu,
+ int slice, int subslice)
+{
+ int subslice_stride = DIV_ROUND_UP(sseu->max_eus_per_subslice,
+ BITS_PER_BYTE);
+ int slice_stride = sseu->max_subslices * subslice_stride;
+
+ return slice * slice_stride + subslice * subslice_stride;
+}
+
+/*
+ * The following functions prototypes should be updated with a larger type
+ * than u8 if we ever have more than 8 EUs per subslice.
+ */
+static inline u8 sseu_get_eus(const struct sseu_dev_info *sseu,
+ int slice, int subslice)
+{
+ return sseu->eu_mask[sseu_eu_idx(sseu, slice, subslice)];
+}
+
+static inline void sseu_set_eus(struct sseu_dev_info *sseu,
+ int slice, int subslice, u8 eu_mask)
+{
+ sseu->eu_mask[sseu_eu_idx(sseu, slice, subslice)] = eu_mask;
}
const char *intel_platform_name(enum intel_platform platform);
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index ff25f209d0a5..ac7896031b8d 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -2098,7 +2098,7 @@ make_rpcs(struct drm_i915_private *dev_priv)
if (INTEL_INFO(dev_priv)->sseu.has_subslice_pg) {
rpcs |= GEN8_RPCS_SS_CNT_ENABLE;
- rpcs |= hweight8(INTEL_INFO(dev_priv)->sseu.subslice_mask) <<
+ rpcs |= hweight8(INTEL_INFO(dev_priv)->sseu.subslice_mask[0]) <<
GEN8_RPCS_SS_CNT_SHIFT;
rpcs |= GEN8_RPCS_ENABLE;
}
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index c5ff203e42d6..23ae9a957fab 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -90,7 +90,7 @@ hangcheck_action_to_str(const enum intel_engine_hangcheck_action a)
#define instdone_subslice_mask(dev_priv__) \
(INTEL_GEN(dev_priv__) == 7 ? \
- 1 : INTEL_INFO(dev_priv__)->sseu.subslice_mask)
+ 1 : INTEL_INFO(dev_priv__)->sseu.subslice_mask[0])
#define for_each_instdone_slice_subslice(dev_priv__, slice__, subslice__) \
for ((slice__) = 0, (subslice__) = 0; \
--
2.15.1
_______________________________________________
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Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v7 2/6] drm/i915/debugfs: reuse max slice/subslices already stored in sseu
2018-01-16 19:18 [PATCH v7 0/6] drm/i915: expose RCS topology to userspace Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 1/6] drm/i915: store all subslice masks Lionel Landwerlin
@ 2018-01-16 19:18 ` Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 3/6] drm/i915/debugfs: add rcs topology entry Lionel Landwerlin
` (5 subsequent siblings)
7 siblings, 0 replies; 14+ messages in thread
From: Lionel Landwerlin @ 2018-01-16 19:18 UTC (permalink / raw)
To: intel-gfx
Now that we have that information in topology fields, let's just reused it.
v2: Style tweaks (Tvrtko)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
drivers/gpu/drm/i915/i915_debugfs.c | 27 +++++++++++----------------
1 file changed, 11 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 684551114965..e41a19b7d7bb 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4304,11 +4304,11 @@ static void gen10_sseu_device_status(struct drm_i915_private *dev_priv,
struct sseu_dev_info *sseu)
{
const struct intel_device_info *info = INTEL_INFO(dev_priv);
- int s_max = 6, ss_max = 4;
int s, ss;
- u32 s_reg[s_max], eu_reg[2 * s_max], eu_mask[2];
+ u32 s_reg[info->sseu.max_slices];
+ u32 eu_reg[2 * info->sseu.max_subslices], eu_mask[2];
- for (s = 0; s < s_max; s++) {
+ for (s = 0; s < info->sseu.max_slices; s++) {
/*
* FIXME: Valid SS Mask respects the spec and read
* only valid bits for those registers, excluding reserverd
@@ -4330,7 +4330,7 @@ static void gen10_sseu_device_status(struct drm_i915_private *dev_priv,
GEN9_PGCTL_SSB_EU210_ACK |
GEN9_PGCTL_SSB_EU311_ACK;
- for (s = 0; s < s_max; s++) {
+ for (s = 0; s < info->sseu.max_slices; s++) {
if ((s_reg[s] & GEN9_PGCTL_SLICE_ACK) == 0)
/* skip disabled slice */
continue;
@@ -4338,7 +4338,7 @@ static void gen10_sseu_device_status(struct drm_i915_private *dev_priv,
sseu->slice_mask |= BIT(s);
sseu->subslice_mask[s] = info->sseu.subslice_mask[s];
- for (ss = 0; ss < ss_max; ss++) {
+ for (ss = 0; ss < info->sseu.max_subslices; ss++) {
unsigned int eu_cnt;
if (!(s_reg[s] & (GEN9_PGCTL_SS_ACK(ss))))
@@ -4358,17 +4358,12 @@ static void gen10_sseu_device_status(struct drm_i915_private *dev_priv,
static void gen9_sseu_device_status(struct drm_i915_private *dev_priv,
struct sseu_dev_info *sseu)
{
- int s_max = 3, ss_max = 4;
+ const struct intel_device_info *info = INTEL_INFO(dev_priv);
int s, ss;
- u32 s_reg[s_max], eu_reg[2*s_max], eu_mask[2];
-
- /* BXT has a single slice and at most 3 subslices. */
- if (IS_GEN9_LP(dev_priv)) {
- s_max = 1;
- ss_max = 3;
- }
+ u32 s_reg[info->sseu.max_slices];
+ u32 eu_reg[2 * info->sseu.max_subslices], eu_mask[2];
- for (s = 0; s < s_max; s++) {
+ for (s = 0; s < info->sseu.max_slices; s++) {
s_reg[s] = I915_READ(GEN9_SLICE_PGCTL_ACK(s));
eu_reg[2*s] = I915_READ(GEN9_SS01_EU_PGCTL_ACK(s));
eu_reg[2*s + 1] = I915_READ(GEN9_SS23_EU_PGCTL_ACK(s));
@@ -4383,7 +4378,7 @@ static void gen9_sseu_device_status(struct drm_i915_private *dev_priv,
GEN9_PGCTL_SSB_EU210_ACK |
GEN9_PGCTL_SSB_EU311_ACK;
- for (s = 0; s < s_max; s++) {
+ for (s = 0; s < info->sseu.max_slices; s++) {
if ((s_reg[s] & GEN9_PGCTL_SLICE_ACK) == 0)
/* skip disabled slice */
continue;
@@ -4394,7 +4389,7 @@ static void gen9_sseu_device_status(struct drm_i915_private *dev_priv,
sseu->subslice_mask[s] =
INTEL_INFO(dev_priv)->sseu.subslice_mask[s];
- for (ss = 0; ss < ss_max; ss++) {
+ for (ss = 0; ss < info->sseu.max_subslices; ss++) {
unsigned int eu_cnt;
if (IS_GEN9_LP(dev_priv)) {
--
2.15.1
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v7 3/6] drm/i915/debugfs: add rcs topology entry
2018-01-16 19:18 [PATCH v7 0/6] drm/i915: expose RCS topology to userspace Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 1/6] drm/i915: store all subslice masks Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 2/6] drm/i915/debugfs: reuse max slice/subslices already stored in sseu Lionel Landwerlin
@ 2018-01-16 19:18 ` Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 4/6] drm/i915: add rcs topology to error state Lionel Landwerlin
` (4 subsequent siblings)
7 siblings, 0 replies; 14+ messages in thread
From: Lionel Landwerlin @ 2018-01-16 19:18 UTC (permalink / raw)
To: intel-gfx
While the end goal is to make this information available to userspace
through a new ioctl, there is no reason we can't display it in a human
readable fashion through debugfs.
slice0: 3 subslice(s) (0x7):
subslice0: 8 EUs (0xff)
subslice1: 8 EUs (0xff)
subslice2: 8 EUs (0xff)
subslice3: 0 EUs (0x0)
slice1: 3 subslice(s) (0x7):
subslice0: 8 EUs (0xff)
subslice1: 8 EUs (0xff)
subslice2: 8 EUs (0xff)
subslice3: 0 EUs (0x0)
slice2: 3 subslice(s) (0x7):
subslice0: 8 EUs (0xff)
subslice1: 8 EUs (0xff)
subslice2: 8 EUs (0xff)
subslice3: 0 EUs (0x0)
v2: Reformat debugfs printing (Tvrtko)
Use the new EU mask helper (Tvrtko)
v3: Move printing code to intel_device_info.c to be shared with error
state (Michal)
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
drivers/gpu/drm/i915/i915_debugfs.c | 11 +++++++++++
drivers/gpu/drm/i915/intel_device_info.c | 25 +++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_device_info.h | 2 ++
3 files changed, 38 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index e41a19b7d7bb..c3a44a54a0ba 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3166,6 +3166,16 @@ static int i915_engine_info(struct seq_file *m, void *unused)
return 0;
}
+static int i915_rcs_topology(struct seq_file *m, void *unused)
+{
+ struct drm_i915_private *dev_priv = node_to_i915(m->private);
+ struct drm_printer p = drm_seq_file_printer(m);
+
+ intel_device_info_dump_topology(&INTEL_INFO(dev_priv)->sseu, &p);
+
+ return 0;
+}
+
static int i915_shrinker_info(struct seq_file *m, void *unused)
{
struct drm_i915_private *i915 = node_to_i915(m->private);
@@ -4696,6 +4706,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
{"i915_dmc_info", i915_dmc_info, 0},
{"i915_display_info", i915_display_info, 0},
{"i915_engine_info", i915_engine_info, 0},
+ {"i915_rcs_topology", i915_rcs_topology, 0},
{"i915_shrinker_info", i915_shrinker_info, 0},
{"i915_shared_dplls_info", i915_shared_dplls_info, 0},
{"i915_dp_mst_info", i915_dp_mst_info, 0},
diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index ed14994527fc..bc08a5ef0ba2 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -123,6 +123,31 @@ void intel_device_info_dump(const struct intel_device_info *info,
intel_device_info_dump_flags(info, p);
}
+void intel_device_info_dump_topology(const struct sseu_dev_info *sseu,
+ struct drm_printer *p)
+{
+ int s, ss;
+
+ if (sseu->max_slices == 0) {
+ drm_printf(p, "Unavailable\n");
+ return;
+ }
+
+ for (s = 0; s < sseu->max_slices; s++) {
+ drm_printf(p, "slice%d: %u subslice(s) (0x%hhx):\n",
+ s, hweight8(sseu->subslice_mask[s]),
+ sseu->subslice_mask[s]);
+
+ for (ss = 0; ss < sseu->max_subslices; ss++) {
+ u8 enabled_eus = sseu_get_eus(sseu, s, ss);
+
+ drm_printf(p, "\tsubslice%d: %u EUs (0x%hhx)\n",
+ ss, hweight8(enabled_eus), enabled_eus);
+ }
+ }
+}
+
+
static u16 compute_eu_total(const struct sseu_dev_info *sseu)
{
u16 i, total = 0;
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index 36e0df87862d..701888162944 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -220,5 +220,7 @@ void intel_device_info_dump_flags(const struct intel_device_info *info,
struct drm_printer *p);
void intel_device_info_dump_runtime(const struct intel_device_info *info,
struct drm_printer *p);
+void intel_device_info_dump_topology(const struct sseu_dev_info *sseu,
+ struct drm_printer *p);
#endif
--
2.15.1
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Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v7 4/6] drm/i915: add rcs topology to error state
2018-01-16 19:18 [PATCH v7 0/6] drm/i915: expose RCS topology to userspace Lionel Landwerlin
` (2 preceding siblings ...)
2018-01-16 19:18 ` [PATCH v7 3/6] drm/i915/debugfs: add rcs topology entry Lionel Landwerlin
@ 2018-01-16 19:18 ` Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 5/6] drm/i915: add query uAPI Lionel Landwerlin
` (3 subsequent siblings)
7 siblings, 0 replies; 14+ messages in thread
From: Lionel Landwerlin @ 2018-01-16 19:18 UTC (permalink / raw)
To: intel-gfx
This might be useful information for developers looking at an error
state.
v2: Place topology towards the end of the error state (Chris)
v3: Reuse common printing code (Michal)
v4: Make this a one-liner (Chris)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
drivers/gpu/drm/i915/i915_gpu_error.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 944059322daa..4e22a7990db2 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -568,6 +568,7 @@ static void err_print_capabilities(struct drm_i915_error_state_buf *m,
struct drm_printer p = i915_error_printer(m);
intel_device_info_dump_flags(info, &p);
+ intel_device_info_dump_topology(&info->sseu, &p);
}
static void err_print_params(struct drm_i915_error_state_buf *m,
--
2.15.1
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Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v7 5/6] drm/i915: add query uAPI
2018-01-16 19:18 [PATCH v7 0/6] drm/i915: expose RCS topology to userspace Lionel Landwerlin
` (3 preceding siblings ...)
2018-01-16 19:18 ` [PATCH v7 4/6] drm/i915: add rcs topology to error state Lionel Landwerlin
@ 2018-01-16 19:18 ` Lionel Landwerlin
2018-01-17 10:10 ` Tvrtko Ursulin
2018-01-16 19:18 ` [PATCH v7 6/6] drm/i915: expose rcs topology through " Lionel Landwerlin
` (2 subsequent siblings)
7 siblings, 1 reply; 14+ messages in thread
From: Lionel Landwerlin @ 2018-01-16 19:18 UTC (permalink / raw)
To: intel-gfx
There are a number of information that are readable from hardware
registers and that we would like to make accessible to userspace. One
particular example is the topology of the execution units (how are
execution units grouped in subslices and slices and also which ones
have been fused off for die recovery).
At the moment the GET_PARAM ioctl covers some basic needs, but
generally is only able to return a single value for each defined
parameter. This is a bit problematic with topology descriptions which
are array/maps of available units.
This change introduces a new ioctl that can deal with requests to fill
structures of potentially variable lengths. The user is expected fill
a query with length fields set at 0 on the first call, the kernel then
sets the length fields to the their expected values. A second call to
the kernel with length fields at their expected values will trigger a
copy of the data to the pointed memory locations.
The scope of this uAPI is only to provide information to userspace,
not to allow configuration of the device.
v2: Simplify dispatcher code iteration (Tvrtko)
Tweak uapi drm_i915_query_item structure (Tvrtko)
v3: Rename pad fields into flags (Chris)
Return error on flags field != 0 (Chris)
Only copy length back to userspace in drm_i915_query_item (Chris)
v4: Use array of functions instead of switch (Chris)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/i915_drv.c | 1 +
drivers/gpu/drm/i915/i915_drv.h | 3 ++
drivers/gpu/drm/i915/i915_query.c | 69 +++++++++++++++++++++++++++++++++++++++
include/uapi/drm/i915_drm.h | 32 ++++++++++++++++++
5 files changed, 106 insertions(+)
create mode 100644 drivers/gpu/drm/i915/i915_query.c
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 3bddd8a06806..b0415a3e2d59 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -69,6 +69,7 @@ i915-y += i915_cmd_parser.o \
i915_gem_timeline.o \
i915_gem_userptr.o \
i915_gemfs.o \
+ i915_query.o \
i915_trace_points.o \
i915_vma.o \
intel_breadcrumbs.o \
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 969835d3cbcd..d92e1b7236fc 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -2824,6 +2824,7 @@ static const struct drm_ioctl_desc i915_ioctls[] = {
DRM_IOCTL_DEF_DRV(I915_PERF_OPEN, i915_perf_open_ioctl, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_PERF_ADD_CONFIG, i915_perf_add_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(I915_PERF_REMOVE_CONFIG, i915_perf_remove_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(I915_QUERY, i915_query_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
};
static struct drm_driver driver = {
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index c42015b05b47..b2615a88936e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3622,6 +3622,9 @@ extern void i915_perf_fini(struct drm_i915_private *dev_priv);
extern void i915_perf_register(struct drm_i915_private *dev_priv);
extern void i915_perf_unregister(struct drm_i915_private *dev_priv);
+/* i915_query.c */
+int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file);
+
/* i915_suspend.c */
extern int i915_save_state(struct drm_i915_private *dev_priv);
extern int i915_restore_state(struct drm_i915_private *dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
new file mode 100644
index 000000000000..51736af7f573
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_query.c
@@ -0,0 +1,69 @@
+/*
+ * Copyright © 2017 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 <uapi/drm/i915_drm.h>
+
+static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv,
+ struct drm_i915_query_item *query_item) = {
+};
+
+int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
+{
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ struct drm_i915_query *args = data;
+ struct drm_i915_query_item __user *user_item_ptr =
+ u64_to_user_ptr(args->items_ptr);
+ u32 i;
+
+ if (args->flags != 0)
+ return -EINVAL;
+
+ for (i = 0; i < args->num_items; i++, user_item_ptr++) {
+ struct drm_i915_query_item item;
+ u64 func_idx;
+ int ret;
+
+ if (copy_from_user(&item, user_item_ptr, sizeof(item)))
+ return -EFAULT;
+
+ if (item.query_id == 0 || item.flags != 0)
+ return -EINVAL;
+
+ func_idx = item.query_id - 1;
+
+ if (func_idx >= ARRAY_SIZE(i915_query_funcs))
+ return -EINVAL;
+
+ ret = i915_query_funcs[func_idx](dev_priv, &item);
+ if (ret < 0)
+ return ret;
+
+ /* Only write the length back to userspace if they differ. */
+ if (ret != item.length && put_user(ret, &user_item_ptr->length))
+ return -EFAULT;
+ }
+
+ return 0;
+}
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 536ee4febd74..07a2a35a4277 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -318,6 +318,7 @@ typedef struct _drm_i915_sarea {
#define DRM_I915_PERF_OPEN 0x36
#define DRM_I915_PERF_ADD_CONFIG 0x37
#define DRM_I915_PERF_REMOVE_CONFIG 0x38
+#define DRM_I915_QUERY 0x39
#define DRM_IOCTL_I915_INIT DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t)
#define DRM_IOCTL_I915_FLUSH DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLUSH)
@@ -375,6 +376,7 @@ typedef struct _drm_i915_sarea {
#define DRM_IOCTL_I915_PERF_OPEN DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_OPEN, struct drm_i915_perf_open_param)
#define DRM_IOCTL_I915_PERF_ADD_CONFIG DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_ADD_CONFIG, struct drm_i915_perf_oa_config)
#define DRM_IOCTL_I915_PERF_REMOVE_CONFIG DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_REMOVE_CONFIG, __u64)
+#define DRM_IOCTL_I915_QUERY DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_QUERY, struct drm_i915_query)
/* Allow drivers to submit batchbuffers directly to hardware, relying
* on the security mechanisms provided by hardware.
@@ -1613,6 +1615,36 @@ struct drm_i915_perf_oa_config {
__u64 flex_regs_ptr;
};
+
+struct drm_i915_query_item {
+ __u64 query_id;
+
+ /*
+ * When set to zero by userspace, this is filled with the size of the
+ * data to be written at the data_ptr pointer.
+ */
+ __u32 length;
+
+ __u32 flags;
+
+ /*
+ * Data will be written at the location pointed by data_ptr when the
+ * value of length matches the length of the data to be written by the
+ * kernel.
+ */
+ __u64 data_ptr;
+};
+
+struct drm_i915_query {
+ __u32 num_items;
+ __u32 flags;
+
+ /*
+ * This point to an array of num_items drm_i915_query_item structures.
+ */
+ __u64 items_ptr;
+};
+
#if defined(__cplusplus)
}
#endif
--
2.15.1
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https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v7 6/6] drm/i915: expose rcs topology through query uAPI
2018-01-16 19:18 [PATCH v7 0/6] drm/i915: expose RCS topology to userspace Lionel Landwerlin
` (4 preceding siblings ...)
2018-01-16 19:18 ` [PATCH v7 5/6] drm/i915: add query uAPI Lionel Landwerlin
@ 2018-01-16 19:18 ` Lionel Landwerlin
2018-01-16 21:48 ` Chris Wilson
2018-01-16 20:11 ` ✓ Fi.CI.BAT: success for drm/i915: expose RCS topology to userspace Patchwork
2018-01-16 22:55 ` ✓ Fi.CI.IGT: " Patchwork
7 siblings, 1 reply; 14+ messages in thread
From: Lionel Landwerlin @ 2018-01-16 19:18 UTC (permalink / raw)
To: intel-gfx
With the introduction of asymmetric slices in CNL, we cannot rely on
the previous SUBSLICE_MASK getparam to tell userspace what subslices
are available. Here we introduce a more detailed way of querying the
Gen's GPU topology that doesn't aggregate numbers.
This is essential for monitoring parts of the GPU with the OA unit,
because counters need to be normalized to the number of
EUs/subslices/slices. The current aggregated numbers like EU_TOTAL do
not gives us sufficient information.
As a bonus we can draw representations of the GPU :
https://imgur.com/a/vuqpa
v2: Rename uapi struct s/_mask/_info/ (Tvrtko)
Report max_slice/subslice/eus_per_subslice rather than strides (Tvrtko)
Add uapi macros to read data from *_info structs (Tvrtko)
v3: Use !!(v & DRM_I915_BIT()) for uapi macros instead of custom shifts (Tvrtko)
v4: factorize query item writting (Tvrtko)
tweak uapi struct/define names (Tvrtko)
v5: Replace ALIGN() macro (Chris)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
---
drivers/gpu/drm/i915/i915_query.c | 94 +++++++++++++++++++++++++++++++++++++++
include/uapi/drm/i915_drm.h | 68 ++++++++++++++++++++++++++++
2 files changed, 162 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
index 51736af7f573..038f292e1f2a 100644
--- a/drivers/gpu/drm/i915/i915_query.c
+++ b/drivers/gpu/drm/i915/i915_query.c
@@ -25,8 +25,102 @@
#include "i915_drv.h"
#include <uapi/drm/i915_drm.h>
+static int copy_query_data(struct drm_i915_query_item *query_item,
+ const void *item_ptr, u32 item_length,
+ const void *data_ptr, u32 data_length)
+{
+ u32 total_length = item_length + data_length;
+
+ if (query_item->length == 0)
+ return total_length;
+
+ if (query_item->length < total_length)
+ return -EINVAL;
+
+ if (copy_to_user(u64_to_user_ptr(query_item->data_ptr),
+ item_ptr, item_length))
+ return -EFAULT;
+
+ if (copy_to_user(u64_to_user_ptr(query_item->data_ptr + item_length),
+ data_ptr, data_length))
+ return -EFAULT;
+
+ return total_length;
+}
+
+static int query_slice_info(struct drm_i915_private *dev_priv,
+ struct drm_i915_query_item *query_item)
+{
+ const struct sseu_dev_info *sseu = &INTEL_INFO(dev_priv)->sseu;
+ struct drm_i915_query_slice_info slice_info;
+
+ if (sseu->max_slices == 0)
+ return -ENODEV;
+
+ /*
+ * If we ever change the internal slice mask data type, we'll need to
+ * update this function.
+ */
+ BUILD_BUG_ON(sizeof(u8) != sizeof(sseu->slice_mask));
+
+ memset(&slice_info, 0, sizeof(slice_info));
+ slice_info.max_slices = sseu->max_slices;
+
+ return copy_query_data(query_item, &slice_info, sizeof(slice_info),
+ &sseu->slice_mask, sizeof(sseu->slice_mask));
+}
+
+static int query_subslice_info(struct drm_i915_private *dev_priv,
+ struct drm_i915_query_item *query_item)
+{
+ const struct sseu_dev_info *sseu = &INTEL_INFO(dev_priv)->sseu;
+ struct drm_i915_query_subslice_info subslice_info;
+ u32 data_length;
+
+ if (sseu->max_slices == 0)
+ return -ENODEV;
+
+ memset(&subslice_info, 0, sizeof(subslice_info));
+ subslice_info.max_slices = sseu->max_slices;
+ subslice_info.max_subslices = sseu->max_subslices;
+
+ data_length = subslice_info.max_slices *
+ DIV_ROUND_UP(subslice_info.max_subslices,
+ sizeof(sseu->subslice_mask[0]) * BITS_PER_BYTE);
+
+ return copy_query_data(query_item,
+ &subslice_info, sizeof(subslice_info),
+ sseu->subslice_mask, data_length);
+}
+
+static int query_eu_info(struct drm_i915_private *dev_priv,
+ struct drm_i915_query_item *query_item)
+{
+ const struct sseu_dev_info *sseu = &INTEL_INFO(dev_priv)->sseu;
+ struct drm_i915_query_eu_info eu_info;
+ u32 data_length;
+
+ if (sseu->max_slices == 0)
+ return -ENODEV;
+
+ memset(&eu_info, 0, sizeof(eu_info));
+ eu_info.max_slices = sseu->max_slices;
+ eu_info.max_subslices = sseu->max_subslices;
+ eu_info.max_eus_per_subslice = sseu->max_eus_per_subslice;
+
+ data_length = eu_info.max_slices * eu_info.max_subslices *
+ DIV_ROUND_UP(eu_info.max_eus_per_subslice, BITS_PER_BYTE);
+
+ return copy_query_data(query_item,
+ &eu_info, sizeof(eu_info),
+ sseu->eu_mask, data_length);
+}
+
static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv,
struct drm_i915_query_item *query_item) = {
+ query_slice_info,
+ query_subslice_info,
+ query_eu_info,
};
int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 07a2a35a4277..912f4aa93de4 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -1618,6 +1618,9 @@ struct drm_i915_perf_oa_config {
struct drm_i915_query_item {
__u64 query_id;
+#define DRM_I915_QUERY_SLICE_INFO 0x01
+#define DRM_I915_QUERY_SUBSLICE_INFO 0x02
+#define DRM_I915_QUERY_EU_INFO 0x03
/*
* When set to zero by userspace, this is filled with the size of the
@@ -1645,6 +1648,71 @@ struct drm_i915_query {
__u64 items_ptr;
};
+#define DRM_I915_BIT(bit) ((__u32)1 << (bit))
+#define DRM_I915_DIV_ROUND_UP(val, div) (((val) + (div) - 1) / (div))
+
+/* Data written by the kernel with query DRM_I915_QUERY_SLICE_INFO :
+ *
+ * data: each bit indicates whether a slice is available (1) or fused off (0).
+ * Formula to tell if slice X is available :
+ *
+ * (data[X / 8] >> (X % 8)) & 1
+ *
+ * Alternatively, use DRM_I915_QUERY_SLICE_AVAILABLE() to query a
+ * given subslice's availability.
+ */
+struct drm_i915_query_slice_info {
+ __u32 max_slices;
+
+#define DRM_I915_QUERY_SLICE_AVAILABLE(info, slice) \
+ !!((info)->data[(slice) / 8] & DRM_I915_BIT((slice) % 8))
+ __u8 data[];
+};
+
+/* Data written by the kernel with query DRM_I915_QUERY_SUBSLICE_INFO :
+ *
+ * data: each bit indicates whether a subslice is available (1) or fused off
+ * (0). Formula to tell if slice X subslice Y is available :
+ *
+ * (data[(X * max_subslices) + Y / 8] >> (Y % 8)) & 1
+ *
+ * Alternatively, use DRM_I915_QUERY_SUBSLICE_AVAILABLE() to query a
+ * given subslice's availability.
+ */
+struct drm_i915_query_subslice_info {
+ __u32 max_slices;
+ __u32 max_subslices;
+
+#define DRM_I915_QUERY_SUBSLICE_AVAILABLE(info, slice, subslice) \
+ !!((info)->data[(slice) * DRM_I915_DIV_ROUND_UP((info)->max_subslices, 8) + \
+ (subslice) / 8] & DRM_I915_BIT((subslice) % 8))
+ __u8 data[];
+};
+
+/* Data written by the kernel with query DRM_I915_QUERY_EU_INFO :
+ *
+ * data: Each bit indicates whether an EU is available (1) or fused off (0).
+ * Formula to tell if slice X subslice Y eu Z is available :
+ *
+ * (data[X * max_subslices * ALIGN(max_eus_per_subslice, 8) / 8 +
+ * Y * ALIGN(max_eus_per_subslice, 8) / 8 +
+ * Z / 8] >> (Z % 8)) & 1
+ *
+ * Alternatively, use DRM_I915_QUERY_EU_AVAILABLE() to query a given
+ * EU's availability.
+ */
+struct drm_i915_query_eu_info {
+ __u32 max_slices;
+ __u32 max_subslices;
+ __u32 max_eus_per_subslice;
+
+#define DRM_I915_QUERY_EU_AVAILABLE(info, slice, subslice, eu) \
+ !!((info)->data[(slice) * DRM_I915_DIV_ROUND_UP((info)->max_eus_per_subslice, 8) * (info)->max_subslices + \
+ (subslice) * DRM_I915_DIV_ROUND_UP((info)->max_eus_per_subslice, 8) + \
+ (eu) / 8] & DRM_I915_BIT((eu) % 8))
+ __u8 data[];
+};
+
#if defined(__cplusplus)
}
#endif
--
2.15.1
_______________________________________________
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Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
^ permalink raw reply related [flat|nested] 14+ messages in thread
* ✓ Fi.CI.BAT: success for drm/i915: expose RCS topology to userspace
2018-01-16 19:18 [PATCH v7 0/6] drm/i915: expose RCS topology to userspace Lionel Landwerlin
` (5 preceding siblings ...)
2018-01-16 19:18 ` [PATCH v7 6/6] drm/i915: expose rcs topology through " Lionel Landwerlin
@ 2018-01-16 20:11 ` Patchwork
2018-01-16 22:55 ` ✓ Fi.CI.IGT: " Patchwork
7 siblings, 0 replies; 14+ messages in thread
From: Patchwork @ 2018-01-16 20:11 UTC (permalink / raw)
To: Lionel Landwerlin; +Cc: intel-gfx
== Series Details ==
Series: drm/i915: expose RCS topology to userspace
URL : https://patchwork.freedesktop.org/series/36567/
State : success
== Summary ==
Series 36567v1 drm/i915: expose RCS topology to userspace
https://patchwork.freedesktop.org/api/1.0/series/36567/revisions/1/mbox/
Test kms_flip:
Subgroup basic-flip-vs-wf_vblank:
pass -> FAIL (fi-hsw-4770r) fdo#100368
Test kms_pipe_crc_basic:
Subgroup read-crc-pipe-a-frame-sequence:
pass -> FAIL (fi-skl-6700k2) fdo#103191
Subgroup suspend-read-crc-pipe-a:
pass -> DMESG-WARN (fi-kbl-r) fdo#104172 +1
fdo#100368 https://bugs.freedesktop.org/show_bug.cgi?id=100368
fdo#103191 https://bugs.freedesktop.org/show_bug.cgi?id=103191
fdo#104172 https://bugs.freedesktop.org/show_bug.cgi?id=104172
fi-bdw-5557u total:288 pass:267 dwarn:0 dfail:0 fail:0 skip:21 time:425s
fi-bdw-gvtdvm total:288 pass:264 dwarn:0 dfail:0 fail:0 skip:24 time:424s
fi-blb-e6850 total:288 pass:223 dwarn:1 dfail:0 fail:0 skip:64 time:373s
fi-bsw-n3050 total:288 pass:242 dwarn:0 dfail:0 fail:0 skip:46 time:492s
fi-bwr-2160 total:288 pass:183 dwarn:0 dfail:0 fail:0 skip:105 time:284s
fi-bxt-dsi total:288 pass:258 dwarn:0 dfail:0 fail:0 skip:30 time:484s
fi-bxt-j4205 total:288 pass:259 dwarn:0 dfail:0 fail:0 skip:29 time:485s
fi-byt-j1900 total:288 pass:253 dwarn:0 dfail:0 fail:0 skip:35 time:470s
fi-byt-n2820 total:288 pass:249 dwarn:0 dfail:0 fail:0 skip:39 time:459s
fi-elk-e7500 total:224 pass:168 dwarn:10 dfail:0 fail:0 skip:45
fi-gdg-551 total:288 pass:179 dwarn:0 dfail:0 fail:1 skip:108 time:278s
fi-glk-1 total:288 pass:260 dwarn:0 dfail:0 fail:0 skip:28 time:515s
fi-hsw-4770 total:288 pass:261 dwarn:0 dfail:0 fail:0 skip:27 time:393s
fi-hsw-4770r total:288 pass:260 dwarn:0 dfail:0 fail:1 skip:27 time:402s
fi-ilk-650 total:288 pass:228 dwarn:0 dfail:0 fail:0 skip:60 time:416s
fi-ivb-3520m total:288 pass:259 dwarn:0 dfail:0 fail:0 skip:29 time:459s
fi-ivb-3770 total:288 pass:255 dwarn:0 dfail:0 fail:0 skip:33 time:422s
fi-kbl-7500u total:288 pass:263 dwarn:1 dfail:0 fail:0 skip:24 time:457s
fi-kbl-7560u total:288 pass:269 dwarn:0 dfail:0 fail:0 skip:19 time:507s
fi-kbl-7567u total:288 pass:268 dwarn:0 dfail:0 fail:0 skip:20 time:455s
fi-kbl-r total:288 pass:260 dwarn:1 dfail:0 fail:0 skip:27 time:505s
fi-pnv-d510 total:288 pass:222 dwarn:1 dfail:0 fail:0 skip:65 time:580s
fi-skl-6260u total:288 pass:268 dwarn:0 dfail:0 fail:0 skip:20 time:435s
fi-skl-6600u total:288 pass:261 dwarn:0 dfail:0 fail:0 skip:27 time:510s
fi-skl-6700hq total:288 pass:262 dwarn:0 dfail:0 fail:0 skip:26 time:528s
fi-skl-6700k2 total:288 pass:263 dwarn:0 dfail:0 fail:1 skip:24 time:489s
fi-skl-6770hq total:288 pass:268 dwarn:0 dfail:0 fail:0 skip:20 time:474s
fi-skl-gvtdvm total:288 pass:265 dwarn:0 dfail:0 fail:0 skip:23 time:430s
fi-snb-2520m total:288 pass:248 dwarn:0 dfail:0 fail:0 skip:40 time:529s
fi-snb-2600 total:288 pass:248 dwarn:0 dfail:0 fail:0 skip:40 time:405s
Blacklisted hosts:
fi-cfl-s2 total:288 pass:262 dwarn:0 dfail:0 fail:0 skip:26 time:576s
fi-glk-dsi total:288 pass:258 dwarn:0 dfail:0 fail:0 skip:30 time:480s
a0ca279440c8d7c40d798fed9939a2a25b31434b drm-tip: 2018y-01m-16d-10h-49m-51s UTC integration manifest
d723af029365 drm/i915: expose rcs topology through query uAPI
a342e6718d76 drm/i915: add query uAPI
200e28b0503f drm/i915: add rcs topology to error state
e5d95f265987 drm/i915/debugfs: add rcs topology entry
6fe14cb925d0 drm/i915/debugfs: reuse max slice/subslices already stored in sseu
d759a576e487 drm/i915: store all subslice masks
== Logs ==
For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_7690/issues.html
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v7 6/6] drm/i915: expose rcs topology through query uAPI
2018-01-16 19:18 ` [PATCH v7 6/6] drm/i915: expose rcs topology through " Lionel Landwerlin
@ 2018-01-16 21:48 ` Chris Wilson
2018-01-17 12:39 ` Lionel Landwerlin
0 siblings, 1 reply; 14+ messages in thread
From: Chris Wilson @ 2018-01-16 21:48 UTC (permalink / raw)
To: Lionel Landwerlin, intel-gfx
Quoting Lionel Landwerlin (2018-01-16 19:18:24)
> diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
> index 51736af7f573..038f292e1f2a 100644
> --- a/drivers/gpu/drm/i915/i915_query.c
> +++ b/drivers/gpu/drm/i915/i915_query.c
> @@ -25,8 +25,102 @@
> #include "i915_drv.h"
> #include <uapi/drm/i915_drm.h>
>
> +static int copy_query_data(struct drm_i915_query_item *query_item,
> + const void *item_ptr, u32 item_length,
> + const void *data_ptr, u32 data_length)
> +{
> + u32 total_length = item_length + data_length;
BUG_ON(add_overflows(item_length, data_length)) ?
> +
> + if (query_item->length == 0)
> + return total_length;
> +
> + if (query_item->length < total_length)
> + return -EINVAL;
> +
> + if (copy_to_user(u64_to_user_ptr(query_item->data_ptr),
> + item_ptr, item_length))
> + return -EFAULT;
> +
> + if (copy_to_user(u64_to_user_ptr(query_item->data_ptr + item_length),
> + data_ptr, data_length))
> + return -EFAULT;
Unchecked overflow (data_ptr + item_length) here.
if (!access_ok(VERIFY_WRITE, u64_to_user_ptr(query_item->data_ptr), total_length))
return -EFAULT;
Would cover it, and then if you wanted you could then use
__copy_to_user().
> +
> + return total_length;
> +}
> +
> +static int query_slice_info(struct drm_i915_private *dev_priv,
> + struct drm_i915_query_item *query_item)
> +{
> + const struct sseu_dev_info *sseu = &INTEL_INFO(dev_priv)->sseu;
> + struct drm_i915_query_slice_info slice_info;
> +
> + if (sseu->max_slices == 0)
> + return -ENODEV;
Brr. This would then abort all queries not just this one, that doesn't
seem very user friendly. EFAULT are definite abort, can't continue, this
is just factual.
-Chris
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^ permalink raw reply [flat|nested] 14+ messages in thread
* ✓ Fi.CI.IGT: success for drm/i915: expose RCS topology to userspace
2018-01-16 19:18 [PATCH v7 0/6] drm/i915: expose RCS topology to userspace Lionel Landwerlin
` (6 preceding siblings ...)
2018-01-16 20:11 ` ✓ Fi.CI.BAT: success for drm/i915: expose RCS topology to userspace Patchwork
@ 2018-01-16 22:55 ` Patchwork
7 siblings, 0 replies; 14+ messages in thread
From: Patchwork @ 2018-01-16 22:55 UTC (permalink / raw)
To: Lionel Landwerlin; +Cc: intel-gfx
== Series Details ==
Series: drm/i915: expose RCS topology to userspace
URL : https://patchwork.freedesktop.org/series/36567/
State : success
== Summary ==
Test kms_flip:
Subgroup flip-vs-fences-interruptible:
dmesg-warn -> PASS (shard-hsw) fdo#102614
Test gem_exec_suspend:
Subgroup basic-s3:
pass -> SKIP (shard-snb) fdo#103880 +1
pass -> SKIP (shard-hsw) fdo#103540
Test perf:
Subgroup polling:
fail -> PASS (shard-hsw) fdo#102252
Test kms_frontbuffer_tracking:
Subgroup fbc-1p-offscren-pri-shrfb-draw-render:
fail -> PASS (shard-snb) fdo#101623
Test gem_tiled_swapping:
Subgroup non-threaded:
incomplete -> PASS (shard-snb) fdo#104218
fdo#102614 https://bugs.freedesktop.org/show_bug.cgi?id=102614
fdo#103880 https://bugs.freedesktop.org/show_bug.cgi?id=103880
fdo#103540 https://bugs.freedesktop.org/show_bug.cgi?id=103540
fdo#102252 https://bugs.freedesktop.org/show_bug.cgi?id=102252
fdo#101623 https://bugs.freedesktop.org/show_bug.cgi?id=101623
fdo#104218 https://bugs.freedesktop.org/show_bug.cgi?id=104218
shard-hsw total:2729 pass:1548 dwarn:1 dfail:0 fail:10 skip:1170 time:9106s
shard-snb total:2729 pass:1317 dwarn:1 dfail:0 fail:10 skip:1401 time:7855s
Blacklisted hosts:
shard-apl total:2729 pass:1698 dwarn:1 dfail:0 fail:23 skip:1006 time:13700s
== Logs ==
For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_7690/shards.html
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v7 5/6] drm/i915: add query uAPI
2018-01-16 19:18 ` [PATCH v7 5/6] drm/i915: add query uAPI Lionel Landwerlin
@ 2018-01-17 10:10 ` Tvrtko Ursulin
2018-01-17 12:45 ` Lionel Landwerlin
0 siblings, 1 reply; 14+ messages in thread
From: Tvrtko Ursulin @ 2018-01-17 10:10 UTC (permalink / raw)
To: Lionel Landwerlin, intel-gfx
On 16/01/2018 19:18, Lionel Landwerlin wrote:
> There are a number of information that are readable from hardware
> registers and that we would like to make accessible to userspace. One
> particular example is the topology of the execution units (how are
> execution units grouped in subslices and slices and also which ones
> have been fused off for die recovery).
>
> At the moment the GET_PARAM ioctl covers some basic needs, but
> generally is only able to return a single value for each defined
> parameter. This is a bit problematic with topology descriptions which
> are array/maps of available units.
>
> This change introduces a new ioctl that can deal with requests to fill
> structures of potentially variable lengths. The user is expected fill
> a query with length fields set at 0 on the first call, the kernel then
> sets the length fields to the their expected values. A second call to
> the kernel with length fields at their expected values will trigger a
> copy of the data to the pointed memory locations.
>
> The scope of this uAPI is only to provide information to userspace,
> not to allow configuration of the device.
>
> v2: Simplify dispatcher code iteration (Tvrtko)
> Tweak uapi drm_i915_query_item structure (Tvrtko)
>
> v3: Rename pad fields into flags (Chris)
> Return error on flags field != 0 (Chris)
> Only copy length back to userspace in drm_i915_query_item (Chris)
>
> v4: Use array of functions instead of switch (Chris)
>
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
I had not read v3 and v4 yet, so lets quickly see if I still approve...
> ---
> drivers/gpu/drm/i915/Makefile | 1 +
> drivers/gpu/drm/i915/i915_drv.c | 1 +
> drivers/gpu/drm/i915/i915_drv.h | 3 ++
> drivers/gpu/drm/i915/i915_query.c | 69 +++++++++++++++++++++++++++++++++++++++
> include/uapi/drm/i915_drm.h | 32 ++++++++++++++++++
> 5 files changed, 106 insertions(+)
> create mode 100644 drivers/gpu/drm/i915/i915_query.c
>
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index 3bddd8a06806..b0415a3e2d59 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -69,6 +69,7 @@ i915-y += i915_cmd_parser.o \
> i915_gem_timeline.o \
> i915_gem_userptr.o \
> i915_gemfs.o \
> + i915_query.o \
> i915_trace_points.o \
> i915_vma.o \
> intel_breadcrumbs.o \
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 969835d3cbcd..d92e1b7236fc 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -2824,6 +2824,7 @@ static const struct drm_ioctl_desc i915_ioctls[] = {
> DRM_IOCTL_DEF_DRV(I915_PERF_OPEN, i915_perf_open_ioctl, DRM_RENDER_ALLOW),
> DRM_IOCTL_DEF_DRV(I915_PERF_ADD_CONFIG, i915_perf_add_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
> DRM_IOCTL_DEF_DRV(I915_PERF_REMOVE_CONFIG, i915_perf_remove_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
> + DRM_IOCTL_DEF_DRV(I915_QUERY, i915_query_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
> };
>
> static struct drm_driver driver = {
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index c42015b05b47..b2615a88936e 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -3622,6 +3622,9 @@ extern void i915_perf_fini(struct drm_i915_private *dev_priv);
> extern void i915_perf_register(struct drm_i915_private *dev_priv);
> extern void i915_perf_unregister(struct drm_i915_private *dev_priv);
>
> +/* i915_query.c */
> +int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file);
> +
> /* i915_suspend.c */
> extern int i915_save_state(struct drm_i915_private *dev_priv);
> extern int i915_restore_state(struct drm_i915_private *dev_priv);
> diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
> new file mode 100644
> index 000000000000..51736af7f573
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/i915_query.c
> @@ -0,0 +1,69 @@
> +/*
> + * Copyright © 2017 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 <uapi/drm/i915_drm.h>
> +
> +static int (* const i915_query_funcs[])(struct drm_i915_private *dev_priv,
> + struct drm_i915_query_item *query_item) = {
> +};
> +
> +int i915_query_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
> +{
> + struct drm_i915_private *dev_priv = to_i915(dev);
> + struct drm_i915_query *args = data;
> + struct drm_i915_query_item __user *user_item_ptr =
> + u64_to_user_ptr(args->items_ptr);
> + u32 i;
> +
> + if (args->flags != 0)
> + return -EINVAL;
> +
> + for (i = 0; i < args->num_items; i++, user_item_ptr++) {
> + struct drm_i915_query_item item;
> + u64 func_idx;
> + int ret;
> +
> + if (copy_from_user(&item, user_item_ptr, sizeof(item)))
> + return -EFAULT;
> +
> + if (item.query_id == 0 || item.flags != 0)
> + return -EINVAL;
How do we define item.flags? I am thinking if it should be handled here,
or perhaps in the item handler? Some items may have flags, some may not,
at some point and then this becomes at the wrong level I think.
> +
> + func_idx = item.query_id - 1;
> +
> + if (func_idx >= ARRAY_SIZE(i915_query_funcs))
> + return -EINVAL;
> +
> + ret = i915_query_funcs[func_idx](dev_priv, &item);
> + if (ret < 0)
> + return ret;
One downside I can think of, of the vfunc approach, is if we decide to
allocated bit-groups of item ids to different categories of stuff at
some point. But I guess it's too hypothetical for now.
> +
> + /* Only write the length back to userspace if they differ. */
> + if (ret != item.length && put_user(ret, &user_item_ptr->length))
> + return -EFAULT;
Would it make sense to return the error code in user_item_ptr->length
(both from put_user, and from the vfunc), so userspace can detect which
item in the list of queries was the problematic one? It would probably
mean re-defining the length field as s32, but 2 GiB of item blobs should
be enough for everyone? :)
> + }
> +
> + return 0;
> +}
> diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
> index 536ee4febd74..07a2a35a4277 100644
> --- a/include/uapi/drm/i915_drm.h
> +++ b/include/uapi/drm/i915_drm.h
> @@ -318,6 +318,7 @@ typedef struct _drm_i915_sarea {
> #define DRM_I915_PERF_OPEN 0x36
> #define DRM_I915_PERF_ADD_CONFIG 0x37
> #define DRM_I915_PERF_REMOVE_CONFIG 0x38
> +#define DRM_I915_QUERY 0x39
>
> #define DRM_IOCTL_I915_INIT DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t)
> #define DRM_IOCTL_I915_FLUSH DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLUSH)
> @@ -375,6 +376,7 @@ typedef struct _drm_i915_sarea {
> #define DRM_IOCTL_I915_PERF_OPEN DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_OPEN, struct drm_i915_perf_open_param)
> #define DRM_IOCTL_I915_PERF_ADD_CONFIG DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_ADD_CONFIG, struct drm_i915_perf_oa_config)
> #define DRM_IOCTL_I915_PERF_REMOVE_CONFIG DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_REMOVE_CONFIG, __u64)
> +#define DRM_IOCTL_I915_QUERY DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_QUERY, struct drm_i915_query)
>
> /* Allow drivers to submit batchbuffers directly to hardware, relying
> * on the security mechanisms provided by hardware.
> @@ -1613,6 +1615,36 @@ struct drm_i915_perf_oa_config {
> __u64 flex_regs_ptr;
> };
>
> +
> +struct drm_i915_query_item {
> + __u64 query_id;
> +
> + /*
> + * When set to zero by userspace, this is filled with the size of the
> + * data to be written at the data_ptr pointer.
> + */
> + __u32 length;
> +
> + __u32 flags;
Say in the comment it's unused for now, here and below, so it looks less
weird in a sandwich between two commented fields?
> +
> + /*
> + * Data will be written at the location pointed by data_ptr when the
> + * value of length matches the length of the data to be written by the
> + * kernel.
> + */
> + __u64 data_ptr;
> +};
> +
> +struct drm_i915_query {
> + __u32 num_items;
> + __u32 flags;
> +
> + /*
> + * This point to an array of num_items drm_i915_query_item structures.
> + */
> + __u64 items_ptr;
> +};
> +
> #if defined(__cplusplus)
> }
> #endif
>
Regards,
Tvrtko
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v7 6/6] drm/i915: expose rcs topology through query uAPI
2018-01-16 21:48 ` Chris Wilson
@ 2018-01-17 12:39 ` Lionel Landwerlin
2018-01-17 12:48 ` Chris Wilson
0 siblings, 1 reply; 14+ messages in thread
From: Lionel Landwerlin @ 2018-01-17 12:39 UTC (permalink / raw)
To: Chris Wilson, intel-gfx
On 16/01/18 21:48, Chris Wilson wrote:
> Quoting Lionel Landwerlin (2018-01-16 19:18:24)
>> diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
>> index 51736af7f573..038f292e1f2a 100644
>> --- a/drivers/gpu/drm/i915/i915_query.c
>> +++ b/drivers/gpu/drm/i915/i915_query.c
>> @@ -25,8 +25,102 @@
>> #include "i915_drv.h"
>> #include <uapi/drm/i915_drm.h>
>>
>> +static int copy_query_data(struct drm_i915_query_item *query_item,
>> + const void *item_ptr, u32 item_length,
>> + const void *data_ptr, u32 data_length)
>> +{
>> + u32 total_length = item_length + data_length;
> BUG_ON(add_overflows(item_length, data_length)) ?
Sure. At the moment those 2 lengths are dictated by uapi structs and
internal numbers in sseu_dev_info, so unlikely to overflow.
Belt & braces!
>
>> +
>> + if (query_item->length == 0)
>> + return total_length;
>> +
>> + if (query_item->length < total_length)
>> + return -EINVAL;
>> +
>> + if (copy_to_user(u64_to_user_ptr(query_item->data_ptr),
>> + item_ptr, item_length))
>> + return -EFAULT;
>> +
>> + if (copy_to_user(u64_to_user_ptr(query_item->data_ptr + item_length),
>> + data_ptr, data_length))
>> + return -EFAULT;
> Unchecked overflow (data_ptr + item_length) here.
>
> if (!access_ok(VERIFY_WRITE, u64_to_user_ptr(query_item->data_ptr), total_length))
> return -EFAULT;
>
> Would cover it, and then if you wanted you could then use
> __copy_to_user().
I thought copy_to_user() did an access_ok() internally. Am I wrong?
>
>> +
>> + return total_length;
>> +}
>> +
>> +static int query_slice_info(struct drm_i915_private *dev_priv,
>> + struct drm_i915_query_item *query_item)
>> +{
>> + const struct sseu_dev_info *sseu = &INTEL_INFO(dev_priv)->sseu;
>> + struct drm_i915_query_slice_info slice_info;
>> +
>> + if (sseu->max_slices == 0)
>> + return -ENODEV;
> Brr. This would then abort all queries not just this one, that doesn't
> seem very user friendly. EFAULT are definite abort, can't continue, this
> is just factual.
> -Chris
>
Ah... Very good point. I guess we should return a 0 length to mean
unsupported query?
Will add a comment in uapi.
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v7 5/6] drm/i915: add query uAPI
2018-01-17 10:10 ` Tvrtko Ursulin
@ 2018-01-17 12:45 ` Lionel Landwerlin
0 siblings, 0 replies; 14+ messages in thread
From: Lionel Landwerlin @ 2018-01-17 12:45 UTC (permalink / raw)
To: Tvrtko Ursulin, intel-gfx
On 17/01/18 10:10, Tvrtko Ursulin wrote:
>
> On 16/01/2018 19:18, Lionel Landwerlin wrote:
>> There are a number of information that are readable from hardware
>> registers and that we would like to make accessible to userspace. One
>> particular example is the topology of the execution units (how are
>> execution units grouped in subslices and slices and also which ones
>> have been fused off for die recovery).
>>
>> At the moment the GET_PARAM ioctl covers some basic needs, but
>> generally is only able to return a single value for each defined
>> parameter. This is a bit problematic with topology descriptions which
>> are array/maps of available units.
>>
>> This change introduces a new ioctl that can deal with requests to fill
>> structures of potentially variable lengths. The user is expected fill
>> a query with length fields set at 0 on the first call, the kernel then
>> sets the length fields to the their expected values. A second call to
>> the kernel with length fields at their expected values will trigger a
>> copy of the data to the pointed memory locations.
>>
>> The scope of this uAPI is only to provide information to userspace,
>> not to allow configuration of the device.
>>
>> v2: Simplify dispatcher code iteration (Tvrtko)
>> Tweak uapi drm_i915_query_item structure (Tvrtko)
>>
>> v3: Rename pad fields into flags (Chris)
>> Return error on flags field != 0 (Chris)
>> Only copy length back to userspace in drm_i915_query_item (Chris)
>>
>> v4: Use array of functions instead of switch (Chris)
>>
>> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
>> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
>
> I had not read v3 and v4 yet, so lets quickly see if I still approve...
>
>> ---
>> drivers/gpu/drm/i915/Makefile | 1 +
>> drivers/gpu/drm/i915/i915_drv.c | 1 +
>> drivers/gpu/drm/i915/i915_drv.h | 3 ++
>> drivers/gpu/drm/i915/i915_query.c | 69
>> +++++++++++++++++++++++++++++++++++++++
>> include/uapi/drm/i915_drm.h | 32 ++++++++++++++++++
>> 5 files changed, 106 insertions(+)
>> create mode 100644 drivers/gpu/drm/i915/i915_query.c
>>
>> diff --git a/drivers/gpu/drm/i915/Makefile
>> b/drivers/gpu/drm/i915/Makefile
>> index 3bddd8a06806..b0415a3e2d59 100644
>> --- a/drivers/gpu/drm/i915/Makefile
>> +++ b/drivers/gpu/drm/i915/Makefile
>> @@ -69,6 +69,7 @@ i915-y += i915_cmd_parser.o \
>> i915_gem_timeline.o \
>> i915_gem_userptr.o \
>> i915_gemfs.o \
>> + i915_query.o \
>> i915_trace_points.o \
>> i915_vma.o \
>> intel_breadcrumbs.o \
>> diff --git a/drivers/gpu/drm/i915/i915_drv.c
>> b/drivers/gpu/drm/i915/i915_drv.c
>> index 969835d3cbcd..d92e1b7236fc 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.c
>> +++ b/drivers/gpu/drm/i915/i915_drv.c
>> @@ -2824,6 +2824,7 @@ static const struct drm_ioctl_desc
>> i915_ioctls[] = {
>> DRM_IOCTL_DEF_DRV(I915_PERF_OPEN, i915_perf_open_ioctl,
>> DRM_RENDER_ALLOW),
>> DRM_IOCTL_DEF_DRV(I915_PERF_ADD_CONFIG,
>> i915_perf_add_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
>> DRM_IOCTL_DEF_DRV(I915_PERF_REMOVE_CONFIG,
>> i915_perf_remove_config_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
>> + DRM_IOCTL_DEF_DRV(I915_QUERY, i915_query_ioctl,
>> DRM_UNLOCKED|DRM_RENDER_ALLOW),
>> };
>> static struct drm_driver driver = {
>> diff --git a/drivers/gpu/drm/i915/i915_drv.h
>> b/drivers/gpu/drm/i915/i915_drv.h
>> index c42015b05b47..b2615a88936e 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.h
>> +++ b/drivers/gpu/drm/i915/i915_drv.h
>> @@ -3622,6 +3622,9 @@ extern void i915_perf_fini(struct
>> drm_i915_private *dev_priv);
>> extern void i915_perf_register(struct drm_i915_private *dev_priv);
>> extern void i915_perf_unregister(struct drm_i915_private *dev_priv);
>> +/* i915_query.c */
>> +int i915_query_ioctl(struct drm_device *dev, void *data, struct
>> drm_file *file);
>> +
>> /* i915_suspend.c */
>> extern int i915_save_state(struct drm_i915_private *dev_priv);
>> extern int i915_restore_state(struct drm_i915_private *dev_priv);
>> diff --git a/drivers/gpu/drm/i915/i915_query.c
>> b/drivers/gpu/drm/i915/i915_query.c
>> new file mode 100644
>> index 000000000000..51736af7f573
>> --- /dev/null
>> +++ b/drivers/gpu/drm/i915/i915_query.c
>> @@ -0,0 +1,69 @@
>> +/*
>> + * Copyright © 2017 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 <uapi/drm/i915_drm.h>
>> +
>> +static int (* const i915_query_funcs[])(struct drm_i915_private
>> *dev_priv,
>> + struct drm_i915_query_item *query_item) = {
>> +};
>> +
>> +int i915_query_ioctl(struct drm_device *dev, void *data, struct
>> drm_file *file)
>> +{
>> + struct drm_i915_private *dev_priv = to_i915(dev);
>> + struct drm_i915_query *args = data;
>> + struct drm_i915_query_item __user *user_item_ptr =
>> + u64_to_user_ptr(args->items_ptr);
>> + u32 i;
>> +
>> + if (args->flags != 0)
>> + return -EINVAL;
>> +
>> + for (i = 0; i < args->num_items; i++, user_item_ptr++) {
>> + struct drm_i915_query_item item;
>> + u64 func_idx;
>> + int ret;
>> +
>> + if (copy_from_user(&item, user_item_ptr, sizeof(item)))
>> + return -EFAULT;
>> +
>> + if (item.query_id == 0 || item.flags != 0)
>> + return -EINVAL;
>
> How do we define item.flags? I am thinking if it should be handled
> here, or perhaps in the item handler? Some items may have flags, some
> may not, at some point and then this becomes at the wrong level I think.
Moving this into the vfuncs.
>
>> +
>> + func_idx = item.query_id - 1;
>> +
>> + if (func_idx >= ARRAY_SIZE(i915_query_funcs))
>> + return -EINVAL;
>> +
>> + ret = i915_query_funcs[func_idx](dev_priv, &item);
>> + if (ret < 0)
>> + return ret;
>
> One downside I can think of, of the vfunc approach, is if we decide to
> allocated bit-groups of item ids to different categories of stuff at
> some point. But I guess it's too hypothetical for now.
>
>> +
>> + /* Only write the length back to userspace if they differ. */
>> + if (ret != item.length && put_user(ret,
>> &user_item_ptr->length))
>> + return -EFAULT;
>
> Would it make sense to return the error code in user_item_ptr->length
> (both from put_user, and from the vfunc), so userspace can detect
> which item in the list of queries was the problematic one? It would
> probably mean re-defining the length field as s32, but 2 GiB of item
> blobs should be enough for everyone? :)
Yeah, Chris raised a similar point with unsupported queries (like this
series doesn't enable slice/subslice info query on gen < 8).
I'm not that experienced with uapi stuff... If that sounds good to
people, then sure.
>
>> + }
>> +
>> + return 0;
>> +}
>> diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
>> index 536ee4febd74..07a2a35a4277 100644
>> --- a/include/uapi/drm/i915_drm.h
>> +++ b/include/uapi/drm/i915_drm.h
>> @@ -318,6 +318,7 @@ typedef struct _drm_i915_sarea {
>> #define DRM_I915_PERF_OPEN 0x36
>> #define DRM_I915_PERF_ADD_CONFIG 0x37
>> #define DRM_I915_PERF_REMOVE_CONFIG 0x38
>> +#define DRM_I915_QUERY 0x39
>> #define DRM_IOCTL_I915_INIT DRM_IOW( DRM_COMMAND_BASE +
>> DRM_I915_INIT, drm_i915_init_t)
>> #define DRM_IOCTL_I915_FLUSH DRM_IO ( DRM_COMMAND_BASE +
>> DRM_I915_FLUSH)
>> @@ -375,6 +376,7 @@ typedef struct _drm_i915_sarea {
>> #define DRM_IOCTL_I915_PERF_OPEN DRM_IOW(DRM_COMMAND_BASE +
>> DRM_I915_PERF_OPEN, struct drm_i915_perf_open_param)
>> #define DRM_IOCTL_I915_PERF_ADD_CONFIG DRM_IOW(DRM_COMMAND_BASE +
>> DRM_I915_PERF_ADD_CONFIG, struct drm_i915_perf_oa_config)
>> #define DRM_IOCTL_I915_PERF_REMOVE_CONFIG DRM_IOW(DRM_COMMAND_BASE
>> + DRM_I915_PERF_REMOVE_CONFIG, __u64)
>> +#define DRM_IOCTL_I915_QUERY DRM_IOWR(DRM_COMMAND_BASE +
>> DRM_I915_QUERY, struct drm_i915_query)
>> /* Allow drivers to submit batchbuffers directly to hardware,
>> relying
>> * on the security mechanisms provided by hardware.
>> @@ -1613,6 +1615,36 @@ struct drm_i915_perf_oa_config {
>> __u64 flex_regs_ptr;
>> };
>> +
>> +struct drm_i915_query_item {
>> + __u64 query_id;
>> +
>> + /*
>> + * When set to zero by userspace, this is filled with the size
>> of the
>> + * data to be written at the data_ptr pointer.
>> + */
>> + __u32 length;
>> +
>> + __u32 flags;
>
> Say in the comment it's unused for now, here and below, so it looks
> less weird in a sandwich between two commented fields?
Done.
>
>> +
>> + /*
>> + * Data will be written at the location pointed by data_ptr when
>> the
>> + * value of length matches the length of the data to be written
>> by the
>> + * kernel.
>> + */
>> + __u64 data_ptr;
>> +};
>> +
>> +struct drm_i915_query {
>> + __u32 num_items;
>> + __u32 flags;
>> +
>> + /*
>> + * This point to an array of num_items drm_i915_query_item
>> structures.
>> + */
>> + __u64 items_ptr;
>> +};
>> +
>> #if defined(__cplusplus)
>> }
>> #endif
>>
>
> Regards,
>
> Tvrtko
>
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v7 6/6] drm/i915: expose rcs topology through query uAPI
2018-01-17 12:39 ` Lionel Landwerlin
@ 2018-01-17 12:48 ` Chris Wilson
0 siblings, 0 replies; 14+ messages in thread
From: Chris Wilson @ 2018-01-17 12:48 UTC (permalink / raw)
To: Lionel Landwerlin, intel-gfx
Quoting Lionel Landwerlin (2018-01-17 12:39:48)
> On 16/01/18 21:48, Chris Wilson wrote:
> > Quoting Lionel Landwerlin (2018-01-16 19:18:24)
> >> diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c
> >> index 51736af7f573..038f292e1f2a 100644
> >> --- a/drivers/gpu/drm/i915/i915_query.c
> >> +++ b/drivers/gpu/drm/i915/i915_query.c
> >> @@ -25,8 +25,102 @@
> >> #include "i915_drv.h"
> >> #include <uapi/drm/i915_drm.h>
> >>
> >> +static int copy_query_data(struct drm_i915_query_item *query_item,
> >> + const void *item_ptr, u32 item_length,
> >> + const void *data_ptr, u32 data_length)
> >> +{
> >> + u32 total_length = item_length + data_length;
> > BUG_ON(add_overflows(item_length, data_length)) ?
>
> Sure. At the moment those 2 lengths are dictated by uapi structs and
> internal numbers in sseu_dev_info, so unlikely to overflow.
> Belt & braces!
>
> >
> >> +
> >> + if (query_item->length == 0)
> >> + return total_length;
> >> +
> >> + if (query_item->length < total_length)
> >> + return -EINVAL;
> >> +
> >> + if (copy_to_user(u64_to_user_ptr(query_item->data_ptr),
> >> + item_ptr, item_length))
> >> + return -EFAULT;
> >> +
> >> + if (copy_to_user(u64_to_user_ptr(query_item->data_ptr + item_length),
> >> + data_ptr, data_length))
> >> + return -EFAULT;
> > Unchecked overflow (data_ptr + item_length) here.
> >
> > if (!access_ok(VERIFY_WRITE, u64_to_user_ptr(query_item->data_ptr), total_length))
> > return -EFAULT;
> >
> > Would cover it, and then if you wanted you could then use
> > __copy_to_user().
>
> I thought copy_to_user() did an access_ok() internally. Am I wrong?
It does. What I'm arguing is that if it only checks the last byte is
valid we will miss the overflow. First copy_to_user() says all bytes
valid, then second copy_to_user() starts at 0, which may also be mapped
into the process, however the combine copy is invalid. Just worrying
about edge cases that may never exist. But we don't want to be the next
/dev/samsung_backdoor do we? :)
> >> +
> >> + return total_length;
> >> +}
> >> +
> >> +static int query_slice_info(struct drm_i915_private *dev_priv,
> >> + struct drm_i915_query_item *query_item)
> >> +{
> >> + const struct sseu_dev_info *sseu = &INTEL_INFO(dev_priv)->sseu;
> >> + struct drm_i915_query_slice_info slice_info;
> >> +
> >> + if (sseu->max_slices == 0)
> >> + return -ENODEV;
> > Brr. This would then abort all queries not just this one, that doesn't
> > seem very user friendly. EFAULT are definite abort, can't continue, this
> > is just factual.
> > -Chris
> >
>
> Ah... Very good point. I guess we should return a 0 length to mean
> unsupported query?
> Will add a comment in uapi.
0 length seems like it should work. Let's see how you feel after hooking
up userspace :)
-Chris
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^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2018-01-17 12:48 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-01-16 19:18 [PATCH v7 0/6] drm/i915: expose RCS topology to userspace Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 1/6] drm/i915: store all subslice masks Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 2/6] drm/i915/debugfs: reuse max slice/subslices already stored in sseu Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 3/6] drm/i915/debugfs: add rcs topology entry Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 4/6] drm/i915: add rcs topology to error state Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 5/6] drm/i915: add query uAPI Lionel Landwerlin
2018-01-17 10:10 ` Tvrtko Ursulin
2018-01-17 12:45 ` Lionel Landwerlin
2018-01-16 19:18 ` [PATCH v7 6/6] drm/i915: expose rcs topology through " Lionel Landwerlin
2018-01-16 21:48 ` Chris Wilson
2018-01-17 12:39 ` Lionel Landwerlin
2018-01-17 12:48 ` Chris Wilson
2018-01-16 20:11 ` ✓ Fi.CI.BAT: success for drm/i915: expose RCS topology to userspace Patchwork
2018-01-16 22:55 ` ✓ Fi.CI.IGT: " Patchwork
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