linux-kernel - [PATCH] habanalabs: report dram_page_size in hw_ip

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Date:   Tue,  8 Dec 2020 17:57:49 +0200
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     SW_Drivers@...ana.ai, Moti Haimovski <mhaimovski@...ana.ai>
Subject: [PATCH] habanalabs: report dram_page_size in hw_ip_info ioctl

From: Moti Haimovski <mhaimovski@...ana.ai>

Instead of having it hard-coded as a define, pass it to the user
in runtime.

Signed-off-by: Moti Haimovski <mhaimovski@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/common/habanalabs_ioctl.c | 1 +
 include/uapi/misc/habanalabs.h                    | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/misc/habanalabs/common/habanalabs_ioctl.c b/drivers/misc/habanalabs/common/habanalabs_ioctl.c
index a0c0d20f6f8f..3343012f4762 100644
--- a/drivers/misc/habanalabs/common/habanalabs_ioctl.c
+++ b/drivers/misc/habanalabs/common/habanalabs_ioctl.c
@@ -63,6 +63,7 @@ static int hw_ip_info(struct hl_device *hdev, struct hl_info_args *args)
 	hw_ip.dram_size = prop->dram_size - dram_kmd_size;
 	if (hw_ip.dram_size > PAGE_SIZE)
 		hw_ip.dram_enabled = 1;
+	hw_ip.dram_page_size = prop->dram_page_size;
 	hw_ip.num_of_events = prop->num_of_events;
 
 	memcpy(hw_ip.cpucp_version, prop->cpucp_info.cpucp_version,
diff --git a/include/uapi/misc/habanalabs.h b/include/uapi/misc/habanalabs.h
index 8a5e60a6dae0..b6e7ceef59af 100644
--- a/include/uapi/misc/habanalabs.h
+++ b/include/uapi/misc/habanalabs.h
@@ -320,6 +320,8 @@ struct hl_info_hw_ip_info {
 	__u8 pad[2];
 	__u8 cpucp_version[HL_INFO_VERSION_MAX_LEN];
 	__u8 card_name[HL_INFO_CARD_NAME_MAX_LEN];
+	__u64 reserved2;
+	__u64 dram_page_size;
 };
 
 struct hl_info_dram_usage {
-- 
2.17.1