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drm/xe/lnl: Enable GuC Wa_14019882105

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Enable GuC Wa_14019882105 to block interrupts during C6 flow
when the memory path has been blocked

v2: Make helper function generic and name it as
    guc_waklv_enable_simple (John Harrison)
v3: Make warning descriptive (John Harrison)
v4: s/drm_WARN/xe_gt_WARN/ (Michal)

Cc: John Harrison <john.harrison@intel.com>
Signed-off-by: Badal Nilawar <badal.nilawar@intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240405084231.3620848-3-badal.nilawar@intel.com
This commit is contained in:
Badal Nilawar 2024-04-05 14:12:31 +05:30 committed by Michal Wajdeczko
parent d6da81a478
commit c151ff5c90
3 changed files with 39 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/xe/abi/guc_klvs_abi.h
View File

@ -319,4 +319,11 @@ enum {
#define GUC_KLV_VF_CFG_BEGIN_CONTEXT_ID_KEY 0x8a0b
#define GUC_KLV_VF_CFG_BEGIN_CONTEXT_ID_LEN 1u
/*
* Workaround keys:
*/
enum xe_guc_klv_ids {
GUC_WORKAROUND_KLV_BLOCK_INTERRUPTS_WHEN_MGSR_BLOCKED = 0x9002,
};
#endif

38
drivers/gpu/drm/xe/xe_guc_ads.c
View File

@ -7,6 +7,8 @@
#include <drm/drm_managed.h>
#include <generated/xe_wa_oob.h>
#include "regs/xe_engine_regs.h"
#include "regs/xe_gt_regs.h"
#include "regs/xe_guc_regs.h"
@ -19,6 +21,7 @@
#include "xe_map.h"
#include "xe_mmio.h"
#include "xe_platform_types.h"
#include "xe_wa.h"
/* Slack of a few additional entries per engine */
#define ADS_REGSET_EXTRA_MAX 8
@ -279,21 +282,42 @@ static size_t calculate_golden_lrc_size(struct xe_guc_ads *ads)
return total_size;
}
static void guc_waklv_enable_simple(struct xe_guc_ads *ads,
enum xe_guc_klv_ids klv_id, u32 *offset, u32 *remain)
{
u32 klv_entry[] = {
/* 16:16 key/length */
FIELD_PREP(GUC_KLV_0_KEY, klv_id) |
FIELD_PREP(GUC_KLV_0_LEN, 0),
/* 0 dwords data */
};
u32 size;
size = sizeof(klv_entry);
if (xe_gt_WARN(ads_to_gt(ads), *remain < size,
"w/a klv buffer too small to add klv id %d\n", klv_id))
return;
xe_map_memcpy_to(ads_to_xe(ads), ads_to_map(ads), *offset,
klv_entry, size);
*offset += size;
*remain -= size;
}
static void guc_waklv_init(struct xe_guc_ads *ads)
{
struct xe_gt *gt = ads_to_gt(ads);
u64 addr_ggtt;
u32 offset, remain, size;
offset = guc_ads_waklv_offset(ads);
remain = guc_ads_waklv_size(ads);
/* Add workarounds here
*
* if (XE_WA(gt, wa_id))
* guc_waklv_enable_simple(ads,
* wa_klv_id,
* &offset, &remain);
*/
if (XE_WA(gt, 14019882105))
guc_waklv_enable_simple(ads,
GUC_WORKAROUND_KLV_BLOCK_INTERRUPTS_WHEN_MGSR_BLOCKED,
&offset, &remain);
size = guc_ads_waklv_size(ads) - remain;
if (!size)

1
drivers/gpu/drm/xe/xe_wa_oob.rules
View File

@ -20,3 +20,4 @@
MEDIA_VERSION(1300)
PLATFORM(DG2)
14018094691 GRAPHICS_VERSION(2004)
14019882105 GRAPHICS_VERSION(2004), GRAPHICS_STEP(A0, B0)