[PATCH v3 1/6] drm/xe: Add functions to convert regular address to canonical address and back

[José Roberto de Souza]

Some instructions requires canonical address like
MI_BATCH_BUFFER_START(UMDs must call xe_exec with a canonical address
for Xe2+).

So here adding functions to convert regular address to canonical
address and back, the first user of this functions will be added
in the next patches.

v3:
- inline removed
- rename highest_address_bit_get() to ppgtt_msb_get()

Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: Maarten Lankhorst <dev at lankhorst.se>
Cc: Stuart Summers <stuart.summers at intel.com>
Cc: Jani Nikula <jani.nikula at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/xe/xe_device.c | 15 +++++++++++++++
 drivers/gpu/drm/xe/xe_device.h |  3 +++
 2 files changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index 6faa7865b1aab..6172d4f987937 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -747,3 +747,18 @@ void xe_device_snapshot_print(struct xe_device *xe, struct drm_printer *p)
 		drm_printf(p, "\tCS reference clock: %u\n", gt->info.reference_clock);
 	}
 }
+
+static int ppgtt_msb_get(struct xe_device *xe)
+{
+	return xe->info.dma_mask_size > 48 ? 57 : 47;
+}
+
+u64 xe_device_canonicalize_addr(struct xe_device *xe, u64 address)
+{
+	return sign_extend64(address, ppgtt_msb_get(xe));
+}
+
+u64 xe_device_uncanonicalize_addr(struct xe_device *xe, u64 address)
+{
+	return address & GENMASK_ULL(ppgtt_msb_get(xe), 0);
+}
diff --git a/drivers/gpu/drm/xe/xe_device.h b/drivers/gpu/drm/xe/xe_device.h
index 270124da1e00e..462f59e902b12 100644
--- a/drivers/gpu/drm/xe/xe_device.h
+++ b/drivers/gpu/drm/xe/xe_device.h
@@ -177,4 +177,7 @@ u32 xe_device_ccs_bytes(struct xe_device *xe, u64 size);
 
 void xe_device_snapshot_print(struct xe_device *xe, struct drm_printer *p);
 
+u64 xe_device_canonicalize_addr(struct xe_device *xe, u64 address);
+u64 xe_device_uncanonicalize_addr(struct xe_device *xe, u64 address);
+
 #endif
-- 
2.43.0