Commit 4d5242a0 authored by Maarten Lankhorst's avatar Maarten Lankhorst
Browse files

drm/xe: Implement capture of HWSP and HWCTX 



Dump the HWCTX and HWSP as part of LRC capture.

Changes since v1:
- Use same layout for HWSP and HWCTX as VM bo's, to simplify dumping.

Signed-off-by: default avatarMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: default avatarJosé Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240227131248.92910-3-maarten.lankhorst@linux.intel.com
parent 784b3410

drivers/gpu/drm/xe/xe_lrc.c

+63 −1
Original line number Diff line number Diff line
@@ -5,6 +5,8 @@ 


#include "xe_lrc.h"



#include <linux/ascii85.h>



#include "instructions/xe_mi_commands.h"

#include "instructions/xe_gfxpipe_commands.h"

#include "instructions/xe_gfx_state_commands.h"
@@ -33,6 +35,10 @@ 
#define ENGINE_INSTANCE_SHIFT			48



struct xe_lrc_snapshot {

	struct xe_bo *lrc_bo;

	void *lrc_snapshot;

	unsigned long lrc_size, lrc_offset;



	u32 context_desc;

	u32 head;

	struct {
@@ -1356,19 +1362,47 @@ struct xe_lrc_snapshot *xe_lrc_snapshot_capture(struct xe_lrc *lrc) 
	snapshot->tail.memory = xe_lrc_read_ctx_reg(lrc, CTX_RING_TAIL);

	snapshot->start_seqno = xe_lrc_start_seqno(lrc);

	snapshot->seqno = xe_lrc_seqno(lrc);

	snapshot->lrc_bo = xe_bo_get(lrc->bo);

	snapshot->lrc_offset = xe_lrc_pphwsp_offset(lrc);

	snapshot->lrc_size = lrc->bo->size - snapshot->lrc_offset;

	snapshot->lrc_snapshot = NULL;

	return snapshot;

}



void xe_lrc_snapshot_capture_delayed(struct xe_lrc_snapshot *snapshot)

{

	struct xe_bo *bo;

	struct iosys_map src;



	if (!snapshot)

		return;



	/* TODO: Copy status page */

	bo = snapshot->lrc_bo;

	snapshot->lrc_bo = NULL;



	snapshot->lrc_snapshot = kvmalloc(snapshot->lrc_size, GFP_KERNEL);

	if (!snapshot->lrc_snapshot)

		goto put_bo;



	dma_resv_lock(bo->ttm.base.resv, NULL);

	if (!ttm_bo_vmap(&bo->ttm, &src)) {

		xe_map_memcpy_from(xe_bo_device(bo),

				   snapshot->lrc_snapshot, &src, snapshot->lrc_offset,

				   snapshot->lrc_size);

		ttm_bo_vunmap(&bo->ttm, &src);

	} else {

		kvfree(snapshot->lrc_snapshot);

		snapshot->lrc_snapshot = NULL;

	}

	dma_resv_unlock(bo->ttm.base.resv);

put_bo:

	xe_bo_put(bo);

}



void xe_lrc_snapshot_print(struct xe_lrc_snapshot *snapshot, struct drm_printer *p)

{

	unsigned long i;



	if (!snapshot)

		return;
@@ -1378,9 +1412,37 @@ void xe_lrc_snapshot_print(struct xe_lrc_snapshot *snapshot, struct drm_printer 
		   snapshot->tail.internal, snapshot->tail.memory);

	drm_printf(p, "\tStart seqno: (memory) %d\n", snapshot->start_seqno);

	drm_printf(p, "\tSeqno: (memory) %d\n", snapshot->seqno);



	if (!snapshot->lrc_snapshot)

		return;



	drm_printf(p, "\t[HWSP].length: 0x%x\n", LRC_PPHWSP_SIZE);

	drm_puts(p, "\t[HWSP].data: ");

	for (i = 0; i < LRC_PPHWSP_SIZE; i += sizeof(u32)) {

		u32 *val = snapshot->lrc_snapshot + i;

		char dumped[ASCII85_BUFSZ];



		drm_puts(p, ascii85_encode(*val, dumped));

	}



	drm_printf(p, "\n\t[HWCTX].length: 0x%lx\n", snapshot->lrc_size - LRC_PPHWSP_SIZE);

	drm_puts(p, "\t[HWCTX].data: ");

	for (; i < snapshot->lrc_size; i += sizeof(u32)) {

		u32 *val = snapshot->lrc_snapshot + i;

		char dumped[ASCII85_BUFSZ];



		drm_puts(p, ascii85_encode(*val, dumped));

	}

	drm_puts(p, "\n");

}



void xe_lrc_snapshot_free(struct xe_lrc_snapshot *snapshot)

{

	if (!snapshot)

		return;



	kvfree(snapshot->lrc_snapshot);

	if (snapshot->lrc_bo)

		xe_bo_put(snapshot->lrc_bo);

	kfree(snapshot);

}