From: Vipul Kumar vipul.kumar@xilinx.com

This patch adds 64-bit addressing support for zynq gem. This means it can perform send and receive operations on 64-bit address buffers.

Signed-off-by: Vipul Kumar vipul.kumar@xilinx.com Signed-off-by: Siva Durga Prasad Paladugu siva.durga.paladugu@xilinx.com Signed-off-by: Michal Simek michal.simek@xilinx.com --- drivers/net/zynq_gem.c | 63 ++++++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 54 insertions(+), 9 deletions(-)

diff --git a/drivers/net/zynq_gem.c b/drivers/net/zynq_gem.c index bc33126..ee528db 100644 --- a/drivers/net/zynq_gem.c +++ b/drivers/net/zynq_gem.c @@ -86,10 +86,17 @@ DECLARE_GLOBAL_DATA_PTR; /* Set with binary 00011000 to use 1536 byte(1*max length frame/buffer) */ #define ZYNQ_GEM_DMACR_RXBUF 0x00180000

+#if defined(CONFIG_PHYS_64BIT) +# define ZYNQ_GEM_DMA_BUS_WIDTH BIT(30) /* 64 bit bus */ +#else +# define ZYNQ_GEM_DMA_BUS_WIDTH (0 << 30) /* 32 bit bus */ +#endif + #define ZYNQ_GEM_DMACR_INIT (ZYNQ_GEM_DMACR_BLENGTH | \ ZYNQ_GEM_DMACR_RXSIZE | \ ZYNQ_GEM_DMACR_TXSIZE | \ - ZYNQ_GEM_DMACR_RXBUF) + ZYNQ_GEM_DMACR_RXBUF | \ + ZYNQ_GEM_DMA_BUS_WIDTH)

#define ZYNQ_GEM_TSR_DONE 0x00000020 /* Tx done mask */

@@ -147,12 +154,20 @@ struct zynq_gem_regs { u32 transmit_q1_ptr; /* 0x440 - Transmit priority queue 1 */ u32 reserved8[15]; u32 receive_q1_ptr; /* 0x480 - Receive priority queue 1 */ + u32 reserved10[17]; + u32 upper_txqbase; /* 0x4C8 - Upper tx_q base addr */ + u32 reserved11[2]; + u32 upper_rxqbase; /* 0x4D4 - Upper rx_q base addr */ };

/* BD descriptors */ struct emac_bd { u32 addr; /* Next descriptor pointer */ u32 status; +#if defined(CONFIG_PHYS_64BIT) + u32 addr_hi; + u32 reserved; +#endif };

#define RX_BUF 32 @@ -390,13 +405,21 @@ static int zynq_gem_init(struct udevice *dev) for (i = 0; i < RX_BUF; i++) { priv->rx_bd[i].status = 0xF0000000; priv->rx_bd[i].addr = - ((ulong)(priv->rxbuffers) + - (i * PKTSIZE_ALIGN)); - } + (lower_32_bits((ulong)(priv->rxbuffers) + + (i * PKTSIZE_ALIGN))); +#if defined(CONFIG_PHYS_64BIT) + priv->rx_bd[i].addr_hi = + (upper_32_bits((ulong)(priv->rxbuffers) + + (i * PKTSIZE_ALIGN))); +#endif + } /* WRAP bit to last BD */ priv->rx_bd[--i].addr |= ZYNQ_GEM_RXBUF_WRAP_MASK; /* Write RxBDs to IP */ - writel((ulong)priv->rx_bd, &regs->rxqbase); + writel(lower_32_bits((ulong)priv->rx_bd), &regs->rxqbase); +#if defined(CONFIG_PHYS_64BIT) + writel(upper_32_bits((ulong)priv->rx_bd), &regs->upper_rxqbase); +#endif

/* Setup for DMA Configuration register */ writel(ZYNQ_GEM_DMACR_INIT, &regs->dmacr); @@ -406,12 +429,18 @@ static int zynq_gem_init(struct udevice *dev)

/* Disable the second priority queue */ dummy_tx_bd->addr = 0; +#if defined(CONFIG_PHYS_64BIT) + dummy_tx_bd->addr_hi = 0; +#endif dummy_tx_bd->status = ZYNQ_GEM_TXBUF_WRAP_MASK | ZYNQ_GEM_TXBUF_LAST_MASK| ZYNQ_GEM_TXBUF_USED_MASK;

dummy_rx_bd->addr = ZYNQ_GEM_RXBUF_WRAP_MASK | ZYNQ_GEM_RXBUF_NEW_MASK; +#if defined(CONFIG_PHYS_64BIT) + dummy_rx_bd->addr_hi = 0; +#endif dummy_rx_bd->status = 0;

writel((ulong)dummy_tx_bd, &regs->transmit_q1_ptr); @@ -485,7 +514,8 @@ static int zynq_gem_init(struct udevice *dev)

static int zynq_gem_send(struct udevice *dev, void *ptr, int len) { - u32 addr, size; + dma_addr_t addr; + u32 size; struct zynq_gem_priv *priv = dev_get_priv(dev); struct zynq_gem_regs *regs = priv->iobase; struct emac_bd *current_bd = &priv->tx_bd[1]; @@ -493,17 +523,26 @@ static int zynq_gem_send(struct udevice *dev, void *ptr, int len) /* Setup Tx BD */ memset(priv->tx_bd, 0, sizeof(struct emac_bd));

- priv->tx_bd->addr = (ulong)ptr; + priv->tx_bd->addr = lower_32_bits((ulong)ptr); +#if defined(CONFIG_PHYS_64BIT) + priv->tx_bd->addr_hi = upper_32_bits((ulong)ptr); +#endif priv->tx_bd->status = (len & ZYNQ_GEM_TXBUF_FRMLEN_MASK) | ZYNQ_GEM_TXBUF_LAST_MASK; /* Dummy descriptor to mark it as the last in descriptor chain */ current_bd->addr = 0x0; +#if defined(CONFIG_PHYS_64BIT) + current_bd->addr_hi = 0x0; +#endif current_bd->status = ZYNQ_GEM_TXBUF_WRAP_MASK | ZYNQ_GEM_TXBUF_LAST_MASK| ZYNQ_GEM_TXBUF_USED_MASK;

/* setup BD */ - writel((ulong)priv->tx_bd, &regs->txqbase); + writel(lower_32_bits((ulong)priv->tx_bd), &regs->txqbase); +#if defined(CONFIG_PHYS_64BIT) + writel(upper_32_bits((ulong)priv->tx_bd), &regs->upper_txqbase); +#endif

addr = (ulong) ptr; addr &= ~(ARCH_DMA_MINALIGN - 1); @@ -531,7 +570,7 @@ static int zynq_gem_send(struct udevice *dev, void *ptr, int len) static int zynq_gem_recv(struct udevice *dev, int flags, uchar **packetp) { int frame_len; - u32 addr; + dma_addr_t addr; struct zynq_gem_priv *priv = dev_get_priv(dev); struct emac_bd *current_bd = &priv->rx_bd[priv->rxbd_current];

@@ -550,8 +589,14 @@ static int zynq_gem_recv(struct udevice *dev, int flags, uchar **packetp) return -1; }

+#if defined(CONFIG_PHYS_64BIT) + addr = (dma_addr_t)((current_bd->addr & ZYNQ_GEM_RXBUF_ADD_MASK) + | ((dma_addr_t)current_bd->addr_hi << 32)); +#else addr = current_bd->addr & ZYNQ_GEM_RXBUF_ADD_MASK; +#endif addr &= ~(ARCH_DMA_MINALIGN - 1); + *packetp = (uchar *)(uintptr_t)addr;

return frame_len;