[PATCH 13/17] drm/xe/oa: Add OAC support
Ashutosh Dixit
ashutosh.dixit at intel.com
Fri Dec 8 06:43:25 UTC 2023
Similar to OAR, allow userspace to execute MI_REPORT_PERF_COUNT on compute
engines of a specified exec queue.
Signed-off-by: Ashutosh Dixit <ashutosh.dixit at intel.com>
---
drivers/gpu/drm/xe/regs/xe_engine_regs.h | 1 +
drivers/gpu/drm/xe/regs/xe_oa_regs.h | 3 +
drivers/gpu/drm/xe/xe_oa.c | 81 +++++++++++++++++++++++-
3 files changed, 82 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/xe/regs/xe_engine_regs.h b/drivers/gpu/drm/xe/regs/xe_engine_regs.h
index 76c0938df05f3..045f9773f01f4 100644
--- a/drivers/gpu/drm/xe/regs/xe_engine_regs.h
+++ b/drivers/gpu/drm/xe/regs/xe_engine_regs.h
@@ -73,6 +73,7 @@
#define RING_CONTEXT_CONTROL(base) XE_REG((base) + 0x244, XE_REG_OPTION_MASKED)
#define CTX_CTRL_OAC_CONTEXT_ENABLE REG_BIT(8)
+#define CTX_CTRL_RUN_ALONE REG_BIT(7)
#define CTX_CTRL_INHIBIT_SYN_CTX_SWITCH REG_BIT(3)
#define CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT REG_BIT(0)
diff --git a/drivers/gpu/drm/xe/regs/xe_oa_regs.h b/drivers/gpu/drm/xe/regs/xe_oa_regs.h
index 7e2e875ccf80a..b66cd95b795e7 100644
--- a/drivers/gpu/drm/xe/regs/xe_oa_regs.h
+++ b/drivers/gpu/drm/xe/regs/xe_oa_regs.h
@@ -74,6 +74,9 @@
#define OAG_OASTATUS_BUFFER_OVERFLOW REG_BIT(1)
#define OAG_OASTATUS_REPORT_LOST REG_BIT(0)
+/* OAC unit */
+#define OAC_OACONTROL XE_REG(0x15114)
+
/* OAM unit */
#define OAM_HEAD_POINTER_OFFSET (0x1a0)
#define OAM_TAIL_POINTER_OFFSET (0x1a4)
diff --git a/drivers/gpu/drm/xe/xe_oa.c b/drivers/gpu/drm/xe/xe_oa.c
index 9d653d7722d1a..42f32d4359f2c 100644
--- a/drivers/gpu/drm/xe/xe_oa.c
+++ b/drivers/gpu/drm/xe/xe_oa.c
@@ -449,6 +449,19 @@ u32 __format_to_oactrl(const struct xe_oa_format *format, int counter_sel_mask)
REG_FIELD_PREP(OA_OACONTROL_COUNTER_SIZE_MASK, format->counter_size);
}
+static u32 __oa_ccs_select(struct xe_oa_stream *stream)
+{
+ u32 val;
+
+ if (stream->hwe->class != XE_ENGINE_CLASS_COMPUTE)
+ return 0;
+
+ val = REG_FIELD_PREP(OAG_OACONTROL_OA_CCS_SELECT_MASK, stream->hwe->instance);
+ xe_assert(stream->oa->xe,
+ REG_FIELD_GET(OAG_OACONTROL_OA_CCS_SELECT_MASK, val) == stream->hwe->instance);
+ return val;
+}
+
static void xe_oa_enable(struct xe_oa_stream *stream)
{
const struct xe_oa_format *format = stream->oa_buffer.format;
@@ -463,7 +476,7 @@ static void xe_oa_enable(struct xe_oa_stream *stream)
regs = __oa_regs(stream);
val = __format_to_oactrl(format, regs->oa_ctrl_counter_select_mask) |
- OAG_OACONTROL_OA_COUNTER_ENABLE;
+ __oa_ccs_select(stream) | OAG_OACONTROL_OA_COUNTER_ENABLE;
xe_mmio_write32(stream->gt, regs->oa_ctrl, val);
}
@@ -762,6 +775,64 @@ static int xe_oa_configure_oar_context(struct xe_oa_stream *stream, bool enable)
return xe_oa_modify_self(stream, regs_lri, ARRAY_SIZE(regs_lri));
}
+static int xe_oa_configure_oac_context(struct xe_oa_stream *stream, bool enable)
+{
+ const struct xe_oa_format *format = stream->oa_buffer.format;
+ struct xe_lrc *lrc = &stream->exec_q->lrc[0];
+ u32 regs_offset = xe_lrc_regs_offset(lrc) / sizeof(u32);
+ u32 oacontrol = __format_to_oactrl(format, OAR_OACONTROL_COUNTER_SEL_MASK) |
+ (enable ? OAR_OACONTROL_COUNTER_ENABLE : 0);
+ struct flex regs_context[] = {
+ {
+ OACTXCONTROL(stream->hwe->mmio_base),
+ stream->oa->ctx_oactxctrl_offset[stream->hwe->class] + 1,
+ enable ? OA_COUNTER_RESUME : 0,
+ },
+ {
+ RING_CONTEXT_CONTROL(stream->hwe->mmio_base),
+ regs_offset + CTX_CONTEXT_CONTROL,
+ _MASKED_FIELD(CTX_CTRL_OAC_CONTEXT_ENABLE,
+ enable ? CTX_CTRL_OAC_CONTEXT_ENABLE : 0) |
+ _MASKED_FIELD(CTX_CTRL_RUN_ALONE,
+ enable ? CTX_CTRL_RUN_ALONE : 0),
+ },
+ };
+ /* Offsets in regs_lri are not used since this configuration is applied using LRI */
+ struct flex regs_lri[] = {
+ {
+ OAC_OACONTROL,
+ OAR_OAC_OACONTROL_OFFSET + 1,
+ oacontrol,
+ },
+ };
+ int err;
+
+ /* Set ccs select to enable programming of OAC_OACONTROL */
+ xe_mmio_write32(stream->gt, __oa_regs(stream)->oa_ctrl, __oa_ccs_select(stream));
+
+ /* Modify stream hwe context image with regs_context */
+ err = xe_oa_modify_context(stream, &stream->exec_q->lrc[0],
+ regs_context, ARRAY_SIZE(regs_context));
+ if (err)
+ return err;
+
+ /* Apply regs_lri using LRI */
+ return xe_oa_modify_self(stream, regs_lri, ARRAY_SIZE(regs_lri));
+}
+
+static int xe_oa_configure_oa_context(struct xe_oa_stream *stream, bool enable)
+{
+ switch (stream->hwe->class) {
+ case XE_ENGINE_CLASS_RENDER:
+ return xe_oa_configure_oar_context(stream, enable);
+ case XE_ENGINE_CLASS_COMPUTE:
+ return xe_oa_configure_oac_context(stream, enable);
+ default:
+ /* Video engines do not support MI_REPORT_PERF_COUNT */
+ return 0;
+ }
+}
+
#define HAS_OA_BPC_REPORTING(xe) (GRAPHICS_VERx100(xe) >= 1255)
static void xe_oa_disable_metric_set(struct xe_oa_stream *stream)
@@ -781,7 +852,7 @@ static void xe_oa_disable_metric_set(struct xe_oa_stream *stream)
/* disable the context save/restore or OAR counters */
if (stream->exec_q)
- xe_oa_configure_oar_context(stream, false);
+ xe_oa_configure_oa_context(stream, false);
/* Make sure we disable noa to save power. */
xe_mmio_rmw32(stream->gt, RPM_CONFIG1, GT_NOA_ENABLE, 0);
@@ -978,8 +1049,9 @@ static int xe_oa_enable_metric_set(struct xe_oa_stream *stream)
xe_mmio_rmw32(stream->gt, XELPMP_SQCNT1, 0, sqcnt1);
+ /* Configure OAR/OAC */
if (stream->exec_q) {
- ret = xe_oa_configure_oar_context(stream, true);
+ ret = xe_oa_configure_oa_context(stream, true);
if (ret)
return ret;
}
@@ -1636,6 +1708,9 @@ int xe_oa_stream_open_ioctl(struct drm_device *dev, void *data, struct drm_file
param.exec_q = xe_exec_queue_lookup(xef, param.exec_queue_id);
if (XE_IOCTL_DBG(oa->xe, !param.exec_q))
return -ENOENT;
+
+ if (param.exec_q->width > 1)
+ drm_dbg(&oa->xe->drm, "exec_q->width > 1, programming only exec_q->lrc[0]\n");
}
/*
--
2.41.0
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