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drm/xe/xe2: Determine bios enablement for flat ccs on igfx

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If bios disables flat ccs on igfx make has_flat_ccs as 0 and notify
via drm_dbg.

Bspec:59255

v2:
 - Release forcewake.
 - Add registers in order.
 - drop dgfx condition and only add it back in the future
when the support for an Xe2 dgpu will be added.
- Use drm_dbg instead of drm_info. (Matt)

v3:
 - Address nit(Matt)

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Acked-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Himal Prasad Ghimiray 2023-12-12 23:55:24 +05:30 • committed by Rodrigo Vivi
parent 7a18d36f88
commit 4cb12b7192
2 changed files with 33 additions and 0 deletions
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3
drivers/gpu/drm/xe/regs/xe_gt_regs.h
View file

@ -162,6 +162,9 @@
#define XEHP_SQCM XE_REG_MCR(0x8724)
#define EN_32B_ACCESS REG_BIT(30)
#define XE2_FLAT_CCS_BASE_RANGE_LOWER XE_REG_MCR(0x8800)
#define XE2_FLAT_CCS_ENABLE REG_BIT(0)
#define GSCPSMI_BASE XE_REG(0x880c)
#define MIRROR_FUSE3 XE_REG(0x9118)

30
drivers/gpu/drm/xe/xe_device.c
View file

@ -15,6 +15,7 @@
#include <drm/drm_print.h>
#include <drm/xe_drm.h>
#include "regs/xe_gt_regs.h"
#include "regs/xe_regs.h"
#include "xe_bo.h"
#include "xe_debugfs.h"
@ -26,6 +27,7 @@
#include "xe_exec.h"
#include "xe_ggtt.h"
#include "xe_gt.h"
#include "xe_gt_mcr.h"
#include "xe_irq.h"
#include "xe_mmio.h"
#include "xe_module.h"
@ -401,6 +403,30 @@ int xe_device_probe_early(struct xe_device *xe)
return 0;
}
static int xe_device_set_has_flat_ccs(struct xe_device *xe)
{
u32 reg;
int err;
if (GRAPHICS_VER(xe) < 20 || !xe->info.has_flat_ccs)
return 0;
struct xe_gt *gt = xe_root_mmio_gt(xe);
err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
if (err)
return err;
reg = xe_gt_mcr_unicast_read_any(gt, XE2_FLAT_CCS_BASE_RANGE_LOWER);
xe->info.has_flat_ccs = (reg & XE2_FLAT_CCS_ENABLE);
if (!xe->info.has_flat_ccs)
drm_dbg(&xe->drm,
"Flat CCS has been disabled in bios, May lead to performance impact");
return xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);
}
int xe_device_probe(struct xe_device *xe)
{
struct xe_tile *tile;
@ -456,6 +482,10 @@ int xe_device_probe(struct xe_device *xe)
goto err_irq_shutdown;
}
err = xe_device_set_has_flat_ccs(xe);
if (err)
return err;
err = xe_mmio_probe_vram(xe);
if (err)
goto err_irq_shutdown;