From fff8019a08b60dce0c7f2858ebe44c5b84ed493b Mon Sep 17 00:00:00 2001 From: Harini Katakam Date: Tue, 9 Aug 2016 13:15:53 +0530 Subject: net: macb: Add 64 bit addressing support for GEM This patch adds support for 64 bit addressing and BDs. -> Enable 64 bit addressing in DMACFG register. -> Set DMA mask when design config register shows support for 64 bit addr. -> Add new BD words for higher address when 64 bit DMA support is present. -> Add and update TBQPH and RBQPH for MSB of BD pointers. -> Change extraction and updation of buffer addresses to use 64 bit address. -> In gem_rx extract address in one place insted of two and use a separate flag for RXUSED. Signed-off-by: Harini Katakam Signed-off-by: David S. Miller --- drivers/net/ethernet/cadence/macb.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers/net/ethernet/cadence/macb.h') diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h index b6fcf10621b6..aa3aeecc3132 100644 --- a/drivers/net/ethernet/cadence/macb.h +++ b/drivers/net/ethernet/cadence/macb.h @@ -66,6 +66,8 @@ #define MACB_USRIO 0x00c0 #define MACB_WOL 0x00c4 #define MACB_MID 0x00fc +#define MACB_TBQPH 0x04C8 +#define MACB_RBQPH 0x04D4 /* GEM register offsets. */ #define GEM_NCFGR 0x0004 /* Network Config */ @@ -139,6 +141,7 @@ #define GEM_ISR(hw_q) (0x0400 + ((hw_q) << 2)) #define GEM_TBQP(hw_q) (0x0440 + ((hw_q) << 2)) +#define GEM_TBQPH(hw_q) (0x04C8) #define GEM_RBQP(hw_q) (0x0480 + ((hw_q) << 2)) #define GEM_IER(hw_q) (0x0600 + ((hw_q) << 2)) #define GEM_IDR(hw_q) (0x0620 + ((hw_q) << 2)) @@ -249,6 +252,8 @@ #define GEM_RXBS_SIZE 8 #define GEM_DDRP_OFFSET 24 /* disc_when_no_ahb */ #define GEM_DDRP_SIZE 1 +#define GEM_ADDR64_OFFSET 30 /* Address bus width - 64b or 32b */ +#define GEM_ADDR64_SIZE 1 /* Bitfields in NSR */ @@ -474,6 +479,10 @@ struct macb_dma_desc { u32 addr; u32 ctrl; +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT + u32 addrh; + u32 resvd; +#endif }; /* DMA descriptor bitfields */ @@ -777,6 +786,7 @@ struct macb_queue { unsigned int IDR; unsigned int IMR; unsigned int TBQP; + unsigned int TBQPH; unsigned int tx_head, tx_tail; struct macb_dma_desc *tx_ring; -- cgit