linux-kernel - [PATCH 6/7] habanalabs: add asic property of host dma offset

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Message-Id: <20210711125418.17533-6-ogabbay@kernel.org>
Date:   Sun, 11 Jul 2021 15:54:17 +0300
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Subject: [PATCH 6/7] habanalabs: add asic property of host dma offset

Each ASIC can have a different offset to add to a host dma address,
to enable the ASIC to access that host memory.

The usage for this can be common code so add this to the asic
property structure.

Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/common/habanalabs.h | 3 +++
 drivers/misc/habanalabs/gaudi/gaudi.c       | 1 +
 drivers/misc/habanalabs/goya/goya.c         | 1 +
 3 files changed, 5 insertions(+)

diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index 6affad6bc1b9..9782bb50931a 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -434,6 +434,8 @@ struct hl_hints_range {
  *                  the device's MMU.
  * @dram_hints_align_mask: dram va hint addresses alignment mask which is used
  *                  for hints validity check.
+ * device_dma_offset_for_host_access: the offset to add to host DMA addresses
+ *                                    to enable the device to access them.
  * @mmu_pgt_size: MMU page tables total size.
  * @mmu_pte_size: PTE size in MMU page tables.
  * @mmu_hop_table_size: MMU hop table size.
@@ -527,6 +529,7 @@ struct asic_fixed_properties {
 	u64				cb_va_start_addr;
 	u64				cb_va_end_addr;
 	u64				dram_hints_align_mask;
+	u64				device_dma_offset_for_host_access;
 	u32				mmu_pgt_size;
 	u32				mmu_pte_size;
 	u32				mmu_hop_table_size;
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 14d0f6d9a383..fdbe8155ef3c 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -537,6 +537,7 @@ static int gaudi_set_fixed_properties(struct hl_device *hdev)
 						get_collective_mode(hdev, i);
 	}
 
+	prop->device_dma_offset_for_host_access = HOST_PHYS_BASE;
 	prop->completion_queues_count = NUMBER_OF_CMPLT_QUEUES;
 	prop->collective_first_sob = 0;
 	prop->collective_first_mon = 0;
diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c
index 017c913f7b5a..ae9871928369 100644
--- a/drivers/misc/habanalabs/goya/goya.c
+++ b/drivers/misc/habanalabs/goya/goya.c
@@ -389,6 +389,7 @@ int goya_set_fixed_properties(struct hl_device *hdev)
 		prop->hw_queues_props[i].cb_alloc_flags = CB_ALLOC_USER;
 	}
 
+	prop->device_dma_offset_for_host_access = HOST_PHYS_BASE;
 	prop->completion_queues_count = NUMBER_OF_CMPLT_QUEUES;
 
 	prop->dram_base_address = DRAM_PHYS_BASE;
-- 
2.25.1