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drm/xe/rtp: Toggle 'deny' bit to (de-)whitelist OA regs

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Whitelist or de-whitelist OA registers by setting or resetting the 'deny'
bit in OA nonpriv registers and writing new register values to HW.

Fixes: 828a8eaf37 ("drm/xe/oa: Add MMIO trigger support")
Cc: stable@vger.kernel.org # v6.12+
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Link: https://patch.msgid.link/20260615224227.34880-7-ashutosh.dixit@intel.com
(cherry picked from commit aeaa7d2bb017272ab9e18759fe00bf758cd3299f)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
This commit is contained in:
Ashutosh Dixit 2026-06-15 15:42:24 -07:00 committed by Thomas Hellström
parent a19a83721a
commit b422babd77
1 changed files with 15 additions and 0 deletions
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15
drivers/gpu/drm/xe/xe_reg_whitelist.c
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@ -229,6 +229,21 @@ void xe_reg_whitelist_process_engine(struct xe_hw_engine *hwe)
whitelist_apply_to_hwe(hwe, &hwe->oa_whitelist, &hwe->reg_sr, first_oa_slot);
}
__maybe_unused static void __whitelist_oa_regs(struct xe_hw_engine *hwe, bool whitelist)
{
struct xe_reg_sr_entry *entry;
unsigned long reg;
xa_for_each(&hwe->oa_sr.xa, reg, entry) {
if (whitelist)
entry->set_bits &= ~RING_FORCE_TO_NONPRIV_DENY;
else
entry->set_bits |= RING_FORCE_TO_NONPRIV_DENY;
}
xe_reg_sr_apply_mmio(&hwe->oa_sr, hwe->gt);
}
/**
* xe_reg_whitelist_print_entry - print one whitelist entry
* @p: DRM printer