xe/oa: Drop the unused logic to parse context image

Now that all register configurations are using MI_LOAD_REGISTER_IMM,
drop the logic to parse context image for offset.

v2: Remove unused lrc headers (Ashutosh)

Signed-off-by: Umesh Nerlige Ramappa <[e-mail]>
Reviewed-by: Ashutosh Dixit <[e-mail]>
Reviewed-by: Jonathan Cavitt <[e-mail]>
Signed-off-by: Ashutosh Dixit <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/xe/xe_oa.c

···
 #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_assert.h"
 #include "xe_bb.h"
···
 #include "xe_gt_mcr.h"
 #include "xe_gt_printk.h"
 #include "xe_guc_pc.h"
-#include "xe_lrc.h"
 #include "xe_macros.h"
 #include "xe_mmio.h"
 #include "xe_oa.h"
···
 	.mmap		= xe_oa_mmap,
 };
 
-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;
-}
-
-#define IS_MI_LRI_CMD(x) (REG_FIELD_GET(MI_OPCODE, (x)) == \
-			  REG_FIELD_GET(MI_OPCODE, MI_LOAD_REGISTER_IMM))
-
-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_gt_lrc_size(stream->gt, 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)
 {
···
 			param->oa_buffer_size % stream->oa_buffer.format->size;
 	else
 		stream->oa_buffer.circ_size = param->oa_buffer_size;
-
-	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) {

drivers/gpu/drm/xe/xe_oa_types.h

···
 	/** @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;