Commit 2d892455 authored by Michal Wajdeczko's avatar Michal Wajdeczko
Browse files

drm/xe/pf: Expose LMTT page size 



The underlying LMTT implementation already provides the info about
the page size it is using.  There is no need to have a separate
helper function that is making assumption about the required size.

Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Piotr Piórkowski <piotr.piorkowski@intel.com>
Reviewed-by: default avatarPiotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patch.msgid.link/20260218205553.3561-2-michal.wajdeczko@intel.com
parent c2366539

drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c

+1 −2
Original line number Diff line number Diff line
@@ -1451,8 +1451,7 @@ int xe_gt_sriov_pf_config_set_fair_dbs(struct xe_gt *gt, unsigned int vfid, 


static u64 pf_get_lmem_alignment(struct xe_gt *gt)

{

	/* this might be platform dependent */

	return SZ_2M;

	return xe_lmtt_page_size(&gt->tile->sriov.pf.lmtt);

}



static u64 pf_get_min_spare_lmem(struct xe_gt *gt)

drivers/gpu/drm/xe/xe_lmtt.c

+17 −0
Original line number Diff line number Diff line
@@ -57,6 +57,23 @@ static u64 lmtt_page_size(struct xe_lmtt *lmtt) 
	return BIT_ULL(lmtt->ops->lmtt_pte_shift(0));

}



/**

 * xe_lmtt_page_size() - Get LMTT page size.

 * @lmtt: the &xe_lmtt

 *

 * This function shall be called only by PF.

 *

 * Return: LMTT page size.

 */

u64 xe_lmtt_page_size(struct xe_lmtt *lmtt)

{

	lmtt_assert(lmtt, IS_SRIOV_PF(lmtt_to_xe(lmtt)));

	lmtt_assert(lmtt, xe_device_has_lmtt(lmtt_to_xe(lmtt)));

	lmtt_assert(lmtt, lmtt->ops);



	return lmtt_page_size(lmtt);

}



static struct xe_lmtt_pt *lmtt_pt_alloc(struct xe_lmtt *lmtt, unsigned int level)

{

	unsigned int num_entries = level ? lmtt->ops->lmtt_pte_num(level) : 0;

drivers/gpu/drm/xe/xe_lmtt.h

+1 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ int xe_lmtt_prepare_pages(struct xe_lmtt *lmtt, unsigned int vfid, u64 range); 
int xe_lmtt_populate_pages(struct xe_lmtt *lmtt, unsigned int vfid, struct xe_bo *bo, u64 offset);

void xe_lmtt_drop_pages(struct xe_lmtt *lmtt, unsigned int vfid);

u64 xe_lmtt_estimate_pt_size(struct xe_lmtt *lmtt, u64 size);

u64 xe_lmtt_page_size(struct xe_lmtt *lmtt);

#else

static inline int xe_lmtt_init(struct xe_lmtt *lmtt) { return 0; }

static inline void xe_lmtt_init_hw(struct xe_lmtt *lmtt) { }