[PATCH v4 1/2] 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 patch.

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

v4:
- use xe->info.va_bits instead of xe->info.dma_mask_size

BSpec: 47626
Cc: Matt Roper <matthew.d.roper at intel.com>
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 | 10 ++++++++++
 drivers/gpu/drm/xe/xe_device.h |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index 6faa7865b1aab..8e8567e06f0bc 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -747,3 +747,13 @@ 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);
 	}
 }
+
+u64 xe_device_canonicalize_addr(struct xe_device *xe, u64 address)
+{
+	return sign_extend64(address, xe->info.va_bits - 1);
+}
+
+u64 xe_device_uncanonicalize_addr(struct xe_device *xe, u64 address)
+{
+	return address & GENMASK_ULL(xe->info.va_bits - 1, 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