From: Matt Roper Date: Mon, 8 Apr 2024 17:05:39 +0000 (+0530) Subject: drm/xe/bmg: Program an additional discrete-specific PAT setting X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=183620f9ae3c8ebd9e126e07020b235d34547eb4;p=linux.git drm/xe/bmg: Program an additional discrete-specific PAT setting Discrete Xe2 platforms require programming of one additional row of PAT settings which controls the access characteristics for PPGTT and LMTT page tables. Integrated GPUs do not need this programming and will leave the register at its hardware default value. Bspec: 71582 Signed-off-by: Matt Roper Signed-off-by: Balasubramani Vivekanandan Reviewed-by: Himal Prasad Ghimiray Link: https://patchwork.freedesktop.org/patch/msgid/20240408170545.3769566-6-balasubramani.vivekanandan@intel.com --- diff --git a/drivers/gpu/drm/xe/xe_pat.c b/drivers/gpu/drm/xe/xe_pat.c index 66d8e3dd82370..13812042177d6 100644 --- a/drivers/gpu/drm/xe/xe_pat.c +++ b/drivers/gpu/drm/xe/xe_pat.c @@ -142,6 +142,7 @@ static const struct xe_pat_table_entry xe2_pat_table[] = { /* Special PAT values programmed outside the main table */ static const struct xe_pat_table_entry xe2_pat_ats = XE2_PAT( 0, 0, 0, 0, 3, 3 ); +static const struct xe_pat_table_entry xe2_pat_pta = XE2_PAT( 0, 0, 0, 0, 3, 0 ); u16 xe_pat_index_get_coh_mode(struct xe_device *xe, u16 pat_index) { @@ -302,6 +303,9 @@ static void xe2lpg_program_pat(struct xe_gt *gt, const struct xe_pat_table_entry { program_pat_mcr(gt, table, n_entries); xe_gt_mcr_multicast_write(gt, XE_REG_MCR(_PAT_ATS), xe2_pat_ats.value); + + if (IS_DGFX(gt_to_xe(gt))) + xe_gt_mcr_multicast_write(gt, XE_REG_MCR(_PAT_PTA), xe2_pat_pta.value); } static void xe2lpm_program_pat(struct xe_gt *gt, const struct xe_pat_table_entry table[], @@ -309,6 +313,9 @@ static void xe2lpm_program_pat(struct xe_gt *gt, const struct xe_pat_table_entry { program_pat(gt, table, n_entries); xe_mmio_write32(gt, XE_REG(_PAT_ATS), xe2_pat_ats.value); + + if (IS_DGFX(gt_to_xe(gt))) + xe_mmio_write32(gt, XE_REG(_PAT_PTA), xe2_pat_pta.value); } static void xe2_dump(struct xe_gt *gt, struct drm_printer *p)