Re: [PATCH v13 net-next 06/15] net: mvpp2: increase BM pool and RXQ size

[Russell King - ARM Linux admin]

On Thu, Feb 11, 2021 at 12:48:53PM +0200, stef...@marvell.com wrote:
> From: Stefan Chulski 
> 
> BM pool and RXQ size increased to support Firmware Flow Control.
> Minimum depletion thresholds to support FC are 1024 buffers.
> BM pool size increased to 2048 to have some 1024 buffers
> space between depletion thresholds and BM pool size.
> 
> Jumbo frames require a 9888B buffer, so memory requirements
> for data buffers increased from 7MB to 24MB.
> 
> Signed-off-by: Stefan Chulski 
> Acked-by: Marcin Wojtas 

Reviewed-by: Russell King 
-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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[PATCH v13 net-next 06/15] net: mvpp2: increase BM pool and RXQ size

[stefanc]

From: Stefan Chulski 

BM pool and RXQ size increased to support Firmware Flow Control.
Minimum depletion thresholds to support FC are 1024 buffers.
BM pool size increased to 2048 to have some 1024 buffers
space between depletion thresholds and BM pool size.

Jumbo frames require a 9888B buffer, so memory requirements
for data buffers increased from 7MB to 24MB.

Signed-off-by: Stefan Chulski 
Acked-by: Marcin Wojtas 
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 8 
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h 
b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index ce08086..e7bbf0a 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -715,8 +715,8 @@
 #define MVPP2_PORT_MAX_RXQ 32
 
 /* Max number of Rx descriptors */
-#define MVPP2_MAX_RXD_MAX  1024
-#define MVPP2_MAX_RXD_DFLT 128
+#define MVPP2_MAX_RXD_MAX  2048
+#define MVPP2_MAX_RXD_DFLT 1024
 
 /* Max number of Tx descriptors */
 #define MVPP2_MAX_TXD_MAX  2048
@@ -848,8 +848,8 @@ enum mvpp22_ptp_packet_format {
 #define MVPP22_PTP_TIMESTAMPQUEUESELECTBIT(18)
 
 /* BM constants */
-#define MVPP2_BM_JUMBO_BUF_NUM 512
-#define MVPP2_BM_LONG_BUF_NUM  1024
+#define MVPP2_BM_JUMBO_BUF_NUM 2048
+#define MVPP2_BM_LONG_BUF_NUM  2048
 #define MVPP2_BM_SHORT_BUF_NUM 2048
 #define MVPP2_BM_POOL_SIZE_MAX (16*1024 - MVPP2_BM_POOL_PTR_ALIGN/4)
 #define MVPP2_BM_POOL_PTR_ALIGN128
-- 
1.9.1