linux-kernel - [PATCH] habanalabs/gaudi: increase MAX CS to 16K

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Message-Id: <20201104140908.10178-3-ogabbay@kernel.org>
Date:   Wed,  4 Nov 2020 16:08:59 +0200
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     SW_Drivers@...ana.ai
Subject: [PATCH] habanalabs/gaudi: increase MAX CS to 16K

We need to have the MAX CS be much larger than the size of the
different queues. In GAUDI we have around 8 groups of queues, and each
group has 1K queue size. To prevent head-of-the-line blocking, we need
to make sure there is sufficient number of available CS allocations
even if one or more of those queues are full.

Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/gaudi/gaudiP.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/habanalabs/gaudi/gaudiP.h b/drivers/misc/habanalabs/gaudi/gaudiP.h
index 1dcf7c41e698..c3c24e8da4e2 100644
--- a/drivers/misc/habanalabs/gaudi/gaudiP.h
+++ b/drivers/misc/habanalabs/gaudi/gaudiP.h
@@ -60,7 +60,7 @@
 
 #define GAUDI_DEFAULT_CARD_NAME		"HL2000"
 
-#define GAUDI_MAX_PENDING_CS		1024
+#define GAUDI_MAX_PENDING_CS		SZ_16K
 
 #if !IS_MAX_PENDING_CS_VALID(GAUDI_MAX_PENDING_CS)
 #error "GAUDI_MAX_PENDING_CS must be power of 2 and greater than 1"
-- 
2.17.1