[PATCH 11/16] drm/xe/oa: Add OAR support
Ashutosh Dixit
ashutosh.dixit at intel.com
Thu Feb 8 05:49:11 UTC 2024
Add OAR support to allow userspace to execute MI_REPORT_PERF_COUNT on
render engines. Configuration batches are used to program the OAR unit, as
well as modifying the render engine context image of a specified exec queue
(to have correct register values when that context switches in).
v2: Rename/refactor xe_oa_modify_self (Umesh)
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa at intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit at intel.com>
---
.../gpu/drm/xe/instructions/xe_mi_commands.h | 3 +
drivers/gpu/drm/xe/regs/xe_engine_regs.h | 3 +-
drivers/gpu/drm/xe/xe_lrc.c | 11 +-
drivers/gpu/drm/xe/xe_lrc.h | 1 +
drivers/gpu/drm/xe/xe_oa.c | 190 ++++++++++++++++++
drivers/gpu/drm/xe/xe_oa_types.h | 4 +
6 files changed, 206 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/xe/instructions/xe_mi_commands.h b/drivers/gpu/drm/xe/instructions/xe_mi_commands.h
index c74ceb550dce7..48d4c759c6885 100644
--- a/drivers/gpu/drm/xe/instructions/xe_mi_commands.h
+++ b/drivers/gpu/drm/xe/instructions/xe_mi_commands.h
@@ -45,6 +45,9 @@
#define MI_LRI_MMIO_REMAP_EN REG_BIT(17)
#define MI_LRI_NUM_REGS(x) XE_INSTR_NUM_DW(2 * (x) + 1)
#define MI_LRI_FORCE_POSTED REG_BIT(12)
+#define IS_MI_LRI_CMD(x) (REG_FIELD_GET(MI_OPCODE, (x)) == \
+ REG_FIELD_GET(MI_OPCODE, MI_LOAD_REGISTER_IMM))
+#define MI_LRI_LEN(x) (((x) & 0xff) + 1)
#define MI_FLUSH_DW __MI_INSTR(0x26)
#define MI_FLUSH_DW_STORE_INDEX REG_BIT(21)
diff --git a/drivers/gpu/drm/xe/regs/xe_engine_regs.h b/drivers/gpu/drm/xe/regs/xe_engine_regs.h
index 0b1266c88a6af..b6ef2df0e5ac0 100644
--- a/drivers/gpu/drm/xe/regs/xe_engine_regs.h
+++ b/drivers/gpu/drm/xe/regs/xe_engine_regs.h
@@ -125,7 +125,8 @@
#define RING_EXECLIST_STATUS_LO(base) XE_REG((base) + 0x234)
#define RING_EXECLIST_STATUS_HI(base) XE_REG((base) + 0x234 + 4)
-#define RING_CONTEXT_CONTROL(base) XE_REG((base) + 0x244)
+#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_INHIBIT_SYN_CTX_SWITCH REG_BIT(3)
#define CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT REG_BIT(0)
diff --git a/drivers/gpu/drm/xe/xe_lrc.c b/drivers/gpu/drm/xe/xe_lrc.c
index 8c85e90220de5..0c4b2802b372c 100644
--- a/drivers/gpu/drm/xe/xe_lrc.c
+++ b/drivers/gpu/drm/xe/xe_lrc.c
@@ -586,12 +586,18 @@ u32 xe_lrc_pphwsp_offset(struct xe_lrc *lrc)
/* Make the magic macros work */
#define __xe_lrc_pphwsp_offset xe_lrc_pphwsp_offset
+#define __xe_lrc_regs_offset xe_lrc_regs_offset
#define LRC_SEQNO_PPHWSP_OFFSET 512
#define LRC_START_SEQNO_PPHWSP_OFFSET (LRC_SEQNO_PPHWSP_OFFSET + 8)
#define LRC_PARALLEL_PPHWSP_OFFSET 2048
#define LRC_PPHWSP_SIZE SZ_4K
+u32 xe_lrc_regs_offset(struct xe_lrc *lrc)
+{
+ return xe_lrc_pphwsp_offset(lrc) + LRC_PPHWSP_SIZE;
+}
+
static size_t lrc_reg_size(struct xe_device *xe)
{
if (GRAPHICS_VERx100(xe) >= 1250)
@@ -623,11 +629,6 @@ static inline u32 __xe_lrc_parallel_offset(struct xe_lrc *lrc)
return xe_lrc_pphwsp_offset(lrc) + LRC_PARALLEL_PPHWSP_OFFSET;
}
-static inline u32 __xe_lrc_regs_offset(struct xe_lrc *lrc)
-{
- return xe_lrc_pphwsp_offset(lrc) + LRC_PPHWSP_SIZE;
-}
-
#define DECL_MAP_ADDR_HELPERS(elem) \
static inline struct iosys_map __xe_lrc_##elem##_map(struct xe_lrc *lrc) \
{ \
diff --git a/drivers/gpu/drm/xe/xe_lrc.h b/drivers/gpu/drm/xe/xe_lrc.h
index 28b1d3f404d4f..d6d8aa8fb51eb 100644
--- a/drivers/gpu/drm/xe/xe_lrc.h
+++ b/drivers/gpu/drm/xe/xe_lrc.h
@@ -23,6 +23,7 @@ void xe_lrc_finish(struct xe_lrc *lrc);
size_t xe_lrc_size(struct xe_device *xe, enum xe_engine_class class);
u32 xe_lrc_pphwsp_offset(struct xe_lrc *lrc);
+u32 xe_lrc_regs_offset(struct xe_lrc *lrc);
void xe_lrc_set_ring_head(struct xe_lrc *lrc, u32 head);
u32 xe_lrc_ring_head(struct xe_lrc *lrc);
diff --git a/drivers/gpu/drm/xe/xe_oa.c b/drivers/gpu/drm/xe/xe_oa.c
index c7b86771d0c28..413fa42e8df71 100644
--- a/drivers/gpu/drm/xe/xe_oa.c
+++ b/drivers/gpu/drm/xe/xe_oa.c
@@ -11,7 +11,9 @@
#include <drm/xe_drm.h>
#include "instructions/xe_mi_commands.h"
+#include "regs/xe_engine_regs.h"
#include "regs/xe_gt_regs.h"
+#include "regs/xe_lrc_layout.h"
#include "regs/xe_oa_regs.h"
#include "xe_device.h"
#include "xe_exec_queue.h"
@@ -19,6 +21,7 @@
#include "xe_bo.h"
#include "xe_gt.h"
#include "xe_gt_mcr.h"
+#include "xe_lrc.h"
#include "xe_mmio.h"
#include "xe_oa.h"
#include "xe_sched_job.h"
@@ -51,6 +54,12 @@ struct xe_oa_config {
struct rcu_head rcu;
};
+struct flex {
+ struct xe_reg reg;
+ u32 offset;
+ u32 value;
+};
+
struct xe_oa_open_param {
u32 oa_unit_id;
bool sample;
@@ -583,6 +592,93 @@ static void xe_oa_free_configs(struct xe_oa_stream *stream)
free_oa_config_bo(oa_bo);
}
+static void xe_oa_store_flex(struct xe_oa_stream *stream, struct xe_lrc *lrc,
+ struct xe_bb *bb, const struct flex *flex, u32 count)
+{
+ u32 offset = xe_bo_ggtt_addr(lrc->bo);
+
+ do {
+ bb->cs[bb->len++] = MI_STORE_DATA_IMM | BIT(22) /* GGTT */ | 2;
+ bb->cs[bb->len++] = offset + flex->offset * sizeof(u32);
+ bb->cs[bb->len++] = 0;
+ bb->cs[bb->len++] = flex->value;
+
+ } while (flex++, --count);
+}
+
+static int xe_oa_modify_ctx_image(struct xe_oa_stream *stream, struct xe_lrc *lrc,
+ const struct flex *flex, u32 count)
+{
+ struct xe_bb *bb;
+ int err;
+
+ bb = xe_bb_new(stream->gt, 4 * count, false);
+ if (IS_ERR(bb)) {
+ err = PTR_ERR(bb);
+ goto exit;
+ }
+
+ xe_oa_store_flex(stream, lrc, bb, flex, count);
+
+ err = xe_oa_submit_bb(stream, bb);
+ xe_bb_free(bb, NULL);
+exit:
+ return err;
+}
+
+static int xe_oa_load_with_lri(struct xe_oa_stream *stream, struct xe_oa_reg *reg_lri)
+{
+ struct xe_bb *bb;
+ int err;
+
+ bb = xe_bb_new(stream->gt, 3, false);
+ if (IS_ERR(bb)) {
+ err = PTR_ERR(bb);
+ goto exit;
+ }
+
+ write_cs_mi_lri(bb, reg_lri, 1);
+
+ err = xe_oa_submit_bb(stream, bb);
+ xe_bb_free(bb, NULL);
+exit:
+ return err;
+}
+
+static int xe_oa_configure_oar_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)
+ },
+ };
+ struct xe_oa_reg reg_lri = { OAR_OACONTROL, oacontrol };
+ int err;
+
+ /* Modify stream hwe context image with regs_context */
+ err = xe_oa_modify_ctx_image(stream, &stream->exec_q->lrc[0],
+ regs_context, ARRAY_SIZE(regs_context));
+ if (err)
+ return err;
+
+ /* Apply reg_lri using LRI */
+ return xe_oa_load_with_lri(stream, ®_lri);
+}
+
#define HAS_OA_BPC_REPORTING(xe) (GRAPHICS_VERx100(xe) >= 1255)
static void xe_oa_disable_metric_set(struct xe_oa_stream *stream)
@@ -600,6 +696,10 @@ static void xe_oa_disable_metric_set(struct xe_oa_stream *stream)
_MASKED_BIT_DISABLE(DISABLE_DOP_GATING));
}
+ /* disable the context save/restore or OAR counters */
+ if (stream->exec_q)
+ xe_oa_configure_oar_context(stream, false);
+
/* Make sure we disable noa to save power. */
xe_mmio_rmw32(stream->gt, RPM_CONFIG1, GT_NOA_ENABLE, 0);
@@ -727,6 +827,7 @@ static u32 oag_report_ctx_switches(const struct xe_oa_stream *stream)
static int xe_oa_enable_metric_set(struct xe_oa_stream *stream)
{
u32 oa_debug, sqcnt1;
+ int ret;
/*
* Wa_1508761755:xehpsdv, dg2
@@ -764,6 +865,12 @@ static int xe_oa_enable_metric_set(struct xe_oa_stream *stream)
xe_mmio_rmw32(stream->gt, XELPMP_SQCNT1, 0, sqcnt1);
+ if (stream->exec_q) {
+ ret = xe_oa_configure_oar_context(stream, true);
+ if (ret)
+ return ret;
+ }
+
return xe_oa_emit_oa_config(stream);
}
@@ -917,6 +1024,78 @@ static const struct file_operations xe_oa_fops = {
.unlocked_ioctl = xe_oa_ioctl,
};
+static bool engine_supports_mi_query(struct xe_hw_engine *hwe)
+{
+ return hwe->class == XE_ENGINE_CLASS_RENDER ||
+ hwe->class == XE_ENGINE_CLASS_COMPUTE;
+}
+
+static bool xe_oa_find_reg_in_lri(u32 *state, u32 reg, u32 *offset, u32 end)
+{
+ u32 idx = *offset;
+ u32 len = min(MI_LRI_LEN(state[idx]) + idx, end);
+ bool found = false;
+
+ idx++;
+ for (; idx < len; idx += 2) {
+ if (state[idx] == reg) {
+ found = true;
+ break;
+ }
+ }
+
+ *offset = idx;
+ return found;
+}
+
+static u32 xe_oa_context_image_offset(struct xe_oa_stream *stream, u32 reg)
+{
+ struct xe_lrc *lrc = &stream->exec_q->lrc[0];
+ u32 len = (xe_lrc_size(stream->oa->xe, stream->hwe->class) +
+ lrc->ring.size) / sizeof(u32);
+ u32 offset = xe_lrc_regs_offset(lrc) / sizeof(u32);
+ u32 *state = (u32 *)lrc->bo->vmap.vaddr;
+
+ if (drm_WARN_ON(&stream->oa->xe->drm, !state))
+ return U32_MAX;
+
+ for (; offset < len; ) {
+ if (IS_MI_LRI_CMD(state[offset])) {
+ /*
+ * We expect reg-value pairs in MI_LRI command, so
+ * MI_LRI_LEN() should be even
+ */
+ drm_WARN_ON(&stream->oa->xe->drm,
+ MI_LRI_LEN(state[offset]) & 0x1);
+
+ if (xe_oa_find_reg_in_lri(state, reg, &offset, len))
+ break;
+ } else {
+ offset++;
+ }
+ }
+
+ return offset < len ? offset : U32_MAX;
+}
+
+static int xe_oa_set_ctx_ctrl_offset(struct xe_oa_stream *stream)
+{
+ struct xe_reg reg = OACTXCONTROL(stream->hwe->mmio_base);
+ u32 offset = stream->oa->ctx_oactxctrl_offset[stream->hwe->class];
+
+ /* Do this only once. Failure is stored as offset of U32_MAX */
+ if (offset)
+ goto exit;
+
+ offset = xe_oa_context_image_offset(stream, reg.addr);
+ stream->oa->ctx_oactxctrl_offset[stream->hwe->class] = offset;
+
+ drm_dbg(&stream->oa->xe->drm, "%s oa ctx control at 0x%08x dword offset\n",
+ stream->hwe->name, offset);
+exit:
+ return offset && offset != U32_MAX ? 0 : -ENODEV;
+}
+
static int xe_oa_stream_init(struct xe_oa_stream *stream,
struct xe_oa_open_param *param)
{
@@ -934,6 +1113,17 @@ static int xe_oa_stream_init(struct xe_oa_stream *stream,
stream->periodic = param->period_exponent > 0;
stream->period_exponent = param->period_exponent;
+ if (stream->exec_q && engine_supports_mi_query(stream->hwe)) {
+ /* If we don't find the context offset, just return error */
+ ret = xe_oa_set_ctx_ctrl_offset(stream);
+ if (ret) {
+ drm_err(&stream->oa->xe->drm,
+ "xe_oa_set_ctx_ctrl_offset failed for %s\n",
+ stream->hwe->name);
+ goto exit;
+ }
+ }
+
stream->oa_config = xe_oa_get_oa_config(stream->oa, param->metric_set);
if (!stream->oa_config) {
drm_dbg(&stream->oa->xe->drm, "Invalid OA config id=%i\n", param->metric_set);
diff --git a/drivers/gpu/drm/xe/xe_oa_types.h b/drivers/gpu/drm/xe/xe_oa_types.h
index 539830f5f0b24..d93b7b490563b 100644
--- a/drivers/gpu/drm/xe/xe_oa_types.h
+++ b/drivers/gpu/drm/xe/xe_oa_types.h
@@ -13,6 +13,7 @@
#include <drm/xe_drm.h>
#include "regs/xe_reg_defs.h"
+#include "xe_hw_engine_types.h"
#define XE_OA_BUFFER_SIZE SZ_16M
@@ -132,6 +133,9 @@ struct xe_oa {
/** @metrics_idr: List of dynamic configurations (struct xe_oa_config) */
struct idr metrics_idr;
+ /** @ctx_oactxctrl_offset: offset of OACTXCONTROL register in context image */
+ u32 ctx_oactxctrl_offset[XE_ENGINE_CLASS_MAX];
+
/** @oa_formats: tracks all OA formats across platforms */
const struct xe_oa_format *oa_formats;
--
2.41.0
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