This patch increases the number of RX-FIFOs to 3 and the max TX-FIFO depth to 16. This leads to the following default ring configuration. CAN-2.0 mode: | FIFO setup: TEF: 0x400: 8*12 bytes = 96 bytes | FIFO setup: RX-0: FIFO 1/0x460: 32*20 bytes = 640 bytes | FIFO setup: RX-1: FIFO 2/0x6e0: 32*20 bytes = 640 bytes | FIFO setup: RX-2: FIFO 3/0x960: 16*20 bytes = 320 bytes | FIFO setup: TX: FIFO 4/0xaa0: 8*16 bytes = 128 bytes | FIFO setup: free: 224 bytes CAN-FD mode: | FIFO setup: TEF: 0x400: 4*12 bytes = 48 bytes | FIFO setup: RX-0: FIFO 1/0x430: 16*76 bytes = 1216 bytes | FIFO setup: RX-1: FIFO 2/0x8f0: 4*76 bytes = 304 bytes | FIFO setup: TX: FIFO 3/0xa20: 4*72 bytes = 288 bytes | FIFO setup: free: 192 bytes With the previously added ethtool ring configuration support the RAM on the chip can now be runtime configured between RX and TX buffers. Link: https://lore.kernel.org/20220313083640.501791-13-mkl@xxxxxxxxxxxxxx Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> --- drivers/net/can/spi/mcp251xfd/mcp251xfd.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd.h b/drivers/net/can/spi/mcp251xfd/mcp251xfd.h index c6cb8c3391b3..9cb6b5ad8dda 100644 --- a/drivers/net/can/spi/mcp251xfd/mcp251xfd.h +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd.h @@ -398,7 +398,7 @@ static_assert(MCP251XFD_TIMESTAMP_WORK_DELAY_SEC < /* FIFO and Ring */ #define MCP251XFD_FIFO_TEF_NUM 1U -#define MCP251XFD_FIFO_RX_NUM 1U +#define MCP251XFD_FIFO_RX_NUM 3U #define MCP251XFD_FIFO_TX_NUM 1U #define MCP251XFD_FIFO_DEPTH 32U @@ -409,7 +409,7 @@ static_assert(MCP251XFD_TIMESTAMP_WORK_DELAY_SEC < #define MCP251XFD_RX_FIFO_DEPTH_COALESCE_MIN 8U #define MCP251XFD_TX_OBJ_NUM_MIN 2U -#define MCP251XFD_TX_OBJ_NUM_MAX 8U +#define MCP251XFD_TX_OBJ_NUM_MAX 16U #define MCP251XFD_TX_OBJ_NUM_CAN_DEFAULT 8U #define MCP251XFD_TX_OBJ_NUM_CANFD_DEFAULT 4U #define MCP251XFD_TX_FIFO_DEPTH_MIN 2U -- 2.35.1
