linux-kernel - [PATCH 2/4] habanalabs: support fetching first available user CQ

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Date:   Tue,  2 Feb 2021 18:55:58 +0200
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Ofir Bitton <obitton@...ana.ai>
Subject: [PATCH 2/4] habanalabs: support fetching first available user CQ

From: Ofir Bitton <obitton@...ana.ai>

User must be aware of the available CQs when it needs to use them.

Signed-off-by: Ofir Bitton <obitton@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/common/habanalabs.h       | 2 ++
 drivers/misc/habanalabs/common/habanalabs_ioctl.c | 3 ++-
 drivers/misc/habanalabs/gaudi/gaudi.c             | 3 +++
 drivers/misc/habanalabs/goya/goya.c               | 3 +++
 include/uapi/misc/habanalabs.h                    | 3 +++
 5 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index 3c54010f7ab9..98163317ec43 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -411,6 +411,7 @@ struct hl_mmu_properties {
  * @first_available_user_mon: first monitor available for the user
  * @first_available_user_msix_interrupt: first available msix interrupt
  *                                       reserved for the user
+ * @first_available_cq: first available CQ for the user.
  * @tpc_enabled_mask: which TPCs are enabled.
  * @completion_queues_count: number of completion queues.
  * @fw_security_disabled: true if security measures are disabled in firmware,
@@ -475,6 +476,7 @@ struct asic_fixed_properties {
 	u16				first_available_user_sob[HL_MAX_DCORES];
 	u16				first_available_user_mon[HL_MAX_DCORES];
 	u16				first_available_user_msix_interrupt;
+	u16				first_available_cq[HL_MAX_DCORES];
 	u8				tpc_enabled_mask;
 	u8				completion_queues_count;
 	u8				fw_security_disabled;
diff --git a/drivers/misc/habanalabs/common/habanalabs_ioctl.c b/drivers/misc/habanalabs/common/habanalabs_ioctl.c
index e86f46d4b613..03af61cecd37 100644
--- a/drivers/misc/habanalabs/common/habanalabs_ioctl.c
+++ b/drivers/misc/habanalabs/common/habanalabs_ioctl.c
@@ -397,7 +397,8 @@ static int sync_manager_info(struct hl_fpriv *hpriv, struct hl_info_args *args)
 			prop->first_available_user_sob[args->dcore_id];
 	sm_info.first_available_monitor =
 			prop->first_available_user_mon[args->dcore_id];
-
+	sm_info.first_available_cq =
+			prop->first_available_cq[args->dcore_id];
 
 	return copy_to_user(out, &sm_info, min_t(size_t, (size_t) max_size,
 			sizeof(sm_info))) ? -EFAULT : 0;
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 006c34ae35c2..8fc0de3cf3a9 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -529,6 +529,9 @@ static int gaudi_get_fixed_properties(struct hl_device *hdev)
 
 	prop->first_available_user_msix_interrupt = USHRT_MAX;
 
+	for (i = 0 ; i < HL_MAX_DCORES ; i++)
+		prop->first_available_cq[i] = USHRT_MAX;
+
 	/* disable fw security for now, set it in a later stage */
 	prop->fw_security_disabled = true;
 	prop->fw_security_status_valid = false;
diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c
index 53db7e966866..d26b405f0c17 100644
--- a/drivers/misc/habanalabs/goya/goya.c
+++ b/drivers/misc/habanalabs/goya/goya.c
@@ -457,6 +457,9 @@ int goya_get_fixed_properties(struct hl_device *hdev)
 
 	prop->first_available_user_msix_interrupt = USHRT_MAX;
 
+	for (i = 0 ; i < HL_MAX_DCORES ; i++)
+		prop->first_available_cq[i] = USHRT_MAX;
+
 	/* disable fw security for now, set it in a later stage */
 	prop->fw_security_disabled = true;
 	prop->fw_security_status_valid = false;
diff --git a/include/uapi/misc/habanalabs.h b/include/uapi/misc/habanalabs.h
index ebde42b37b43..64ae83b5f8e5 100644
--- a/include/uapi/misc/habanalabs.h
+++ b/include/uapi/misc/habanalabs.h
@@ -414,10 +414,13 @@ struct hl_pll_frequency_info {
  * struct hl_info_sync_manager - sync manager information
  * @first_available_sync_object: first available sob
  * @first_available_monitor: first available monitor
+ * @first_available_cq: first available cq
  */
 struct hl_info_sync_manager {
 	__u32 first_available_sync_object;
 	__u32 first_available_monitor;
+	__u32 first_available_cq;
+	__u32 reserved;
 };
 
 /**
-- 
2.25.1