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bcm63xx_enet: add support Broadcom BCM6345 Ethernet 

This patch adds support for the Broadcom BCM6345 SoC Ethernet. BCM6345
has a slightly different and older DMA engine which requires the
following modifications:

- the width of the DMA channels on BCM6345 is 64 bytes vs 16 bytes,
  which means that the helpers enet_dma{c,s} need to account for this
  channel width and we can no longer use macros

- BCM6345 DMA engine does not have any internal SRAM for transfering
  buffers

- BCM6345 buffer allocation and flow control is not per-channel but
  global (done in RSET_ENETDMA)

- the DMA engine bits are right-shifted by 3 compared to other DMA
  generations

- the DMA enable/interrupt masks are a little different (we need to
  enabled more bits for 6345)

- some register have the same meaning but are offsetted in the ENET_DMAC
  space so a lookup table is required to return the proper offset

The MAC itself is identical and requires no modifications to work.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2013-06-12 20:53:05 +01:00 committed by David S. Miller
parent ca4ec90b31
commit 3dc6475c0c
6 changed files with 329 additions and 91 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
arch/mips/bcm63xx/dev-enet.c
View File

@ -9,10 +9,44 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/export.h>
#include <bcm63xx_dev_enet.h>
#include <bcm63xx_io.h>
#include <bcm63xx_regs.h>
#ifdef BCMCPU_RUNTIME_DETECT
static const unsigned long bcm6348_regs_enetdmac[] = {
[ENETDMAC_CHANCFG] = ENETDMAC_CHANCFG_REG,
[ENETDMAC_IR] = ENETDMAC_IR_REG,
[ENETDMAC_IRMASK] = ENETDMAC_IRMASK_REG,
[ENETDMAC_MAXBURST] = ENETDMAC_MAXBURST_REG,
};
static const unsigned long bcm6345_regs_enetdmac[] = {
[ENETDMAC_CHANCFG] = ENETDMA_6345_CHANCFG_REG,
[ENETDMAC_IR] = ENETDMA_6345_IR_REG,
[ENETDMAC_IRMASK] = ENETDMA_6345_IRMASK_REG,
[ENETDMAC_MAXBURST] = ENETDMA_6345_MAXBURST_REG,
[ENETDMAC_BUFALLOC] = ENETDMA_6345_BUFALLOC_REG,
[ENETDMAC_RSTART] = ENETDMA_6345_RSTART_REG,
[ENETDMAC_FC] = ENETDMA_6345_FC_REG,
[ENETDMAC_LEN] = ENETDMA_6345_LEN_REG,
};
const unsigned long *bcm63xx_regs_enetdmac;
EXPORT_SYMBOL(bcm63xx_regs_enetdmac);
static __init void bcm63xx_enetdmac_regs_init(void)
{
if (BCMCPU_IS_6345())
bcm63xx_regs_enetdmac = bcm6345_regs_enetdmac;
else
bcm63xx_regs_enetdmac = bcm6348_regs_enetdmac;
}
#else
static __init void bcm63xx_enetdmac_regs_init(void) { }
#endif
static struct resource shared_res[] = {
{
.start = -1, /* filled at runtime */
@ -137,12 +171,19 @@ static int __init register_shared(void)
if (shared_device_registered)
return 0;
bcm63xx_enetdmac_regs_init();
shared_res[0].start = bcm63xx_regset_address(RSET_ENETDMA);
shared_res[0].end = shared_res[0].start;
shared_res[0].end += (RSET_ENETDMA_SIZE) - 1;
if (BCMCPU_IS_6345())
shared_res[0].end += (RSET_6345_ENETDMA_SIZE) - 1;
else
shared_res[0].end += (RSET_ENETDMA_SIZE) - 1;
if (BCMCPU_IS_6328() || BCMCPU_IS_6362() || BCMCPU_IS_6368())
chan_count = 32;
else if (BCMCPU_IS_6345())
chan_count = 8;
else
chan_count = 16;
@ -172,7 +213,7 @@ int __init bcm63xx_enet_register(int unit,
if (unit > 1)
return -ENODEV;
if (unit == 1 && BCMCPU_IS_6338())
if (unit == 1 && (BCMCPU_IS_6338() || BCMCPU_IS_6345()))
return -ENODEV;
ret = register_shared();
@ -213,6 +254,21 @@ int __init bcm63xx_enet_register(int unit,
dpd->phy_interrupt = bcm63xx_get_irq_number(IRQ_ENET_PHY);
}
dpd->dma_chan_en_mask = ENETDMAC_CHANCFG_EN_MASK;
dpd->dma_chan_int_mask = ENETDMAC_IR_PKTDONE_MASK;
if (BCMCPU_IS_6345()) {
dpd->dma_chan_en_mask |= ENETDMAC_CHANCFG_CHAINING_MASK;
dpd->dma_chan_en_mask |= ENETDMAC_CHANCFG_WRAP_EN_MASK;
dpd->dma_chan_en_mask |= ENETDMAC_CHANCFG_FLOWC_EN_MASK;
dpd->dma_chan_int_mask |= ENETDMA_IR_BUFDONE_MASK;
dpd->dma_chan_int_mask |= ENETDMA_IR_NOTOWNER_MASK;
dpd->dma_chan_width = ENETDMA_6345_CHAN_WIDTH;
dpd->dma_desc_shift = ENETDMA_6345_DESC_SHIFT;
} else {
dpd->dma_has_sram = true;
dpd->dma_chan_width = ENETDMA_CHAN_WIDTH;
}
ret = platform_device_register(pdev);
if (ret)
return ret;
@ -246,6 +302,11 @@ bcm63xx_enetsw_register(const struct bcm63xx_enetsw_platform_data *pd)
else if (BCMCPU_IS_6362() || BCMCPU_IS_6368())
enetsw_pd.num_ports = ENETSW_PORTS_6368;
enetsw_pd.dma_has_sram = true;
enetsw_pd.dma_chan_width = ENETDMA_CHAN_WIDTH;
enetsw_pd.dma_chan_en_mask = ENETDMAC_CHANCFG_EN_MASK;
enetsw_pd.dma_chan_int_mask = ENETDMAC_IR_PKTDONE_MASK;
ret = platform_device_register(&bcm63xx_enetsw_device);
if (ret)
return ret;

3
arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h
View File

@ -174,6 +174,7 @@ enum bcm63xx_regs_set {
#define BCM_6368_RSET_SPI_SIZE 1804
#define RSET_ENET_SIZE 2048
#define RSET_ENETDMA_SIZE 256
#define RSET_6345_ENETDMA_SIZE 64
#define RSET_ENETDMAC_SIZE(chans) (16 * (chans))
#define RSET_ENETDMAS_SIZE(chans) (16 * (chans))
#define RSET_ENETSW_SIZE 65536
@ -300,7 +301,7 @@ enum bcm63xx_regs_set {
#define BCM_6345_USBDMA_BASE (0xfffe2800)
#define BCM_6345_ENET0_BASE (0xfffe1800)
#define BCM_6345_ENETDMA_BASE (0xfffe2800)
#define BCM_6345_ENETDMAC_BASE (0xfffe2900)
#define BCM_6345_ENETDMAC_BASE (0xfffe2840)
#define BCM_6345_ENETDMAS_BASE (0xfffe2a00)
#define BCM_6345_ENETSW_BASE (0xdeadbeef)
#define BCM_6345_PCMCIA_BASE (0xfffe2028)

94
arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_enet.h
View File

@ -4,6 +4,8 @@
#include <linux/if_ether.h>
#include <linux/init.h>
#include <bcm63xx_regs.h>
/*
* on board ethernet platform data
*/
@ -37,6 +39,21 @@ struct bcm63xx_enet_platform_data {
int phy_id, int reg),
void (*mii_write)(struct net_device *dev,
int phy_id, int reg, int val));
/* DMA channel enable mask */
u32 dma_chan_en_mask;
/* DMA channel interrupt mask */
u32 dma_chan_int_mask;
/* DMA engine has internal SRAM */
bool dma_has_sram;
/* DMA channel register width */
unsigned int dma_chan_width;
/* DMA descriptor shift */
unsigned int dma_desc_shift;
};
/*
@ -63,6 +80,18 @@ struct bcm63xx_enetsw_platform_data {
char mac_addr[ETH_ALEN];
int num_ports;
struct bcm63xx_enetsw_port used_ports[ENETSW_MAX_PORT];
/* DMA channel enable mask */
u32 dma_chan_en_mask;
/* DMA channel interrupt mask */
u32 dma_chan_int_mask;
/* DMA channel register width */
unsigned int dma_chan_width;
/* DMA engine has internal SRAM */
bool dma_has_sram;
};
int __init bcm63xx_enet_register(int unit,
@ -70,4 +99,69 @@ int __init bcm63xx_enet_register(int unit,
int bcm63xx_enetsw_register(const struct bcm63xx_enetsw_platform_data *pd);
enum bcm63xx_regs_enetdmac {
ENETDMAC_CHANCFG,
ENETDMAC_IR,
ENETDMAC_IRMASK,
ENETDMAC_MAXBURST,
ENETDMAC_BUFALLOC,
ENETDMAC_RSTART,
ENETDMAC_FC,
ENETDMAC_LEN,
};
static inline unsigned long bcm63xx_enetdmacreg(enum bcm63xx_regs_enetdmac reg)
{
#ifdef BCMCPU_RUNTIME_DETECT
extern const unsigned long *bcm63xx_regs_enetdmac;
return bcm63xx_regs_enetdmac[reg];
#else
#ifdef CONFIG_BCM63XX_CPU_6345
switch (reg) {
case ENETDMAC_CHANCFG:
return ENETDMA_6345_CHANCFG_REG;
case ENETDMAC_IR:
return ENETDMA_6345_IR_REG;
case ENETDMAC_IRMASK:
return ENETDMA_6345_IRMASK_REG;
case ENETDMAC_MAXBURST:
return ENETDMA_6345_MAXBURST_REG;
case ENETDMAC_BUFALLOC:
return ENETDMA_6345_BUFALLOC_REG;
case ENETDMAC_RSTART:
return ENETDMA_6345_RSTART_REG;
case ENETDMAC_FC:
return ENETDMA_6345_FC_REG;
case ENETDMAC_LEN:
return ENETDMA_6345_LEN_REG;
}
#endif
#if defined(CONFIG_BCM63XX_CPU_6328) || \
defined(CONFIG_BCM63XX_CPU_6338) || \
defined(CONFIG_BCM63XX_CPU_6348) || \
defined(CONFIG_BCM63XX_CPU_6358) || \
defined(CONFIG_BCM63XX_CPU_6362) || \
defined(CONFIG_BCM63XX_CPU_6368)
switch (reg) {
case ENETDMAC_CHANCFG:
return ENETDMAC_CHANCFG_REG;
case ENETDMAC_IR:
return ENETDMAC_IR_REG;
case ENETDMAC_IRMASK:
return ENETDMAC_IRMASK_REG;
case ENETDMAC_MAXBURST:
return ENETDMAC_MAXBURST_REG;
case ENETDMAC_BUFALLOC:
case ENETDMAC_RSTART:
case ENETDMAC_FC:
case ENETDMAC_LEN:
return 0;
}
#endif
#endif
return 0;
}
#endif /* ! BCM63XX_DEV_ENET_H_ */

43
arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
View File

@ -727,6 +727,8 @@
/*************************************************************************
* _REG relative to RSET_ENETDMA
*************************************************************************/
#define ENETDMA_CHAN_WIDTH 0x10
#define ENETDMA_6345_CHAN_WIDTH 0x40
/* Controller Configuration Register */
#define ENETDMA_CFG_REG (0x0)
@ -782,31 +784,56 @@
/* State Ram Word 4 */
#define ENETDMA_SRAM4_REG(x) (0x20c + (x) * 0x10)
/* Broadcom 6345 ENET DMA definitions */
#define ENETDMA_6345_CHANCFG_REG (0x00)
#define ENETDMA_6345_MAXBURST_REG (0x40)
#define ENETDMA_6345_RSTART_REG (0x08)
#define ENETDMA_6345_LEN_REG (0x0C)
#define ENETDMA_6345_IR_REG (0x14)
#define ENETDMA_6345_IRMASK_REG (0x18)
#define ENETDMA_6345_FC_REG (0x1C)
#define ENETDMA_6345_BUFALLOC_REG (0x20)
/* Shift down for EOP, SOP and WRAP bits */
#define ENETDMA_6345_DESC_SHIFT (3)
/*************************************************************************
* _REG relative to RSET_ENETDMAC
*************************************************************************/
/* Channel Configuration register */
#define ENETDMAC_CHANCFG_REG(x) ((x) * 0x10)
#define ENETDMAC_CHANCFG_REG (0x0)
#define ENETDMAC_CHANCFG_EN_SHIFT 0
#define ENETDMAC_CHANCFG_EN_MASK (1 << ENETDMAC_CHANCFG_EN_SHIFT)
#define ENETDMAC_CHANCFG_PKTHALT_SHIFT 1
#define ENETDMAC_CHANCFG_PKTHALT_MASK (1 << ENETDMAC_CHANCFG_PKTHALT_SHIFT)
#define ENETDMAC_CHANCFG_BUFHALT_SHIFT 2
#define ENETDMAC_CHANCFG_BUFHALT_MASK (1 << ENETDMAC_CHANCFG_BUFHALT_SHIFT)
#define ENETDMAC_CHANCFG_CHAINING_SHIFT 2
#define ENETDMAC_CHANCFG_CHAINING_MASK (1 << ENETDMAC_CHANCFG_CHAINING_SHIFT)
#define ENETDMAC_CHANCFG_WRAP_EN_SHIFT 3
#define ENETDMAC_CHANCFG_WRAP_EN_MASK (1 << ENETDMAC_CHANCFG_WRAP_EN_SHIFT)
#define ENETDMAC_CHANCFG_FLOWC_EN_SHIFT 4
#define ENETDMAC_CHANCFG_FLOWC_EN_MASK (1 << ENETDMAC_CHANCFG_FLOWC_EN_SHIFT)
/* Interrupt Control/Status register */
#define ENETDMAC_IR_REG(x) (0x4 + (x) * 0x10)
#define ENETDMAC_IR_REG (0x4)
#define ENETDMAC_IR_BUFDONE_MASK (1 << 0)
#define ENETDMAC_IR_PKTDONE_MASK (1 << 1)
#define ENETDMAC_IR_NOTOWNER_MASK (1 << 2)
/* Interrupt Mask register */
#define ENETDMAC_IRMASK_REG(x) (0x8 + (x) * 0x10)
#define ENETDMAC_IRMASK_REG (0x8)
/* Maximum Burst Length */
#define ENETDMAC_MAXBURST_REG(x) (0xc + (x) * 0x10)
#define ENETDMAC_MAXBURST_REG (0xc)
/*************************************************************************
@ -814,16 +841,16 @@
*************************************************************************/
/* Ring Start Address register */
#define ENETDMAS_RSTART_REG(x) ((x) * 0x10)
#define ENETDMAS_RSTART_REG (0x0)
/* State Ram Word 2 */
#define ENETDMAS_SRAM2_REG(x) (0x4 + (x) * 0x10)
#define ENETDMAS_SRAM2_REG (0x4)
/* State Ram Word 3 */
#define ENETDMAS_SRAM3_REG(x) (0x8 + (x) * 0x10)
#define ENETDMAS_SRAM3_REG (0x8)
/* State Ram Word 4 */
#define ENETDMAS_SRAM4_REG(x) (0xc + (x) * 0x10)
#define ENETDMAS_SRAM4_REG (0xc)
/*************************************************************************

200
drivers/net/ethernet/broadcom/bcm63xx_enet.c
View File

@ -107,26 +107,28 @@ static inline void enet_dma_writel(struct bcm_enet_priv *priv,
bcm_writel(val, bcm_enet_shared_base[0] + off);
}
static inline u32 enet_dmac_readl(struct bcm_enet_priv *priv, u32 off)
static inline u32 enet_dmac_readl(struct bcm_enet_priv *priv, u32 off, int chan)
{
return bcm_readl(bcm_enet_shared_base[1] + off);
return bcm_readl(bcm_enet_shared_base[1] +
bcm63xx_enetdmacreg(off) + chan * priv->dma_chan_width);
}
static inline void enet_dmac_writel(struct bcm_enet_priv *priv,
u32 val, u32 off)
u32 val, u32 off, int chan)
{
bcm_writel(val, bcm_enet_shared_base[1] + off);
bcm_writel(val, bcm_enet_shared_base[1] +
bcm63xx_enetdmacreg(off) + chan * priv->dma_chan_width);
}
static inline u32 enet_dmas_readl(struct bcm_enet_priv *priv, u32 off)
static inline u32 enet_dmas_readl(struct bcm_enet_priv *priv, u32 off, int chan)
{
return bcm_readl(bcm_enet_shared_base[2] + off);
return bcm_readl(bcm_enet_shared_base[2] + off + chan * priv->dma_chan_width);
}
static inline void enet_dmas_writel(struct bcm_enet_priv *priv,
u32 val, u32 off)
u32 val, u32 off, int chan)
{
bcm_writel(val, bcm_enet_shared_base[2] + off);
bcm_writel(val, bcm_enet_shared_base[2] + off + chan * priv->dma_chan_width);
}
/*
@ -262,7 +264,7 @@ static int bcm_enet_refill_rx(struct net_device *dev)
len_stat = priv->rx_skb_size << DMADESC_LENGTH_SHIFT;
len_stat |= DMADESC_OWNER_MASK;
if (priv->rx_dirty_desc == priv->rx_ring_size - 1) {
len_stat |= DMADESC_WRAP_MASK;
len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
priv->rx_dirty_desc = 0;
} else {
priv->rx_dirty_desc++;
@ -273,7 +275,10 @@ static int bcm_enet_refill_rx(struct net_device *dev)
priv->rx_desc_count++;
/* tell dma engine we allocated one buffer */
enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
if (priv->dma_has_sram)
enet_dma_writel(priv, 1, ENETDMA_BUFALLOC_REG(priv->rx_chan));
else
enet_dmac_writel(priv, 1, ENETDMAC_BUFALLOC, priv->rx_chan);
}
/* If rx ring is still empty, set a timer to try allocating
@ -349,7 +354,8 @@ static int bcm_enet_receive_queue(struct net_device *dev, int budget)
/* if the packet does not have start of packet _and_
* end of packet flag set, then just recycle it */
if ((len_stat & DMADESC_ESOP_MASK) != DMADESC_ESOP_MASK) {
if ((len_stat & (DMADESC_ESOP_MASK >> priv->dma_desc_shift)) !=
(DMADESC_ESOP_MASK >> priv->dma_desc_shift)) {
dev->stats.rx_dropped++;
continue;
}
@ -410,8 +416,8 @@ static int bcm_enet_receive_queue(struct net_device *dev, int budget)
bcm_enet_refill_rx(dev);
/* kick rx dma */
enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
ENETDMAC_CHANCFG_REG(priv->rx_chan));
enet_dmac_writel(priv, priv->dma_chan_en_mask,
ENETDMAC_CHANCFG, priv->rx_chan);
}
return processed;
@ -486,10 +492,10 @@ static int bcm_enet_poll(struct napi_struct *napi, int budget)
dev = priv->net_dev;
/* ack interrupts */
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IR_REG(priv->rx_chan));
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IR_REG(priv->tx_chan));
enet_dmac_writel(priv, priv->dma_chan_int_mask,
ENETDMAC_IR, priv->rx_chan);
enet_dmac_writel(priv, priv->dma_chan_int_mask,
ENETDMAC_IR, priv->tx_chan);
/* reclaim sent skb */
tx_work_done = bcm_enet_tx_reclaim(dev, 0);
@ -508,10 +514,10 @@ static int bcm_enet_poll(struct napi_struct *napi, int budget)
napi_complete(napi);
/* restore rx/tx interrupt */
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IRMASK_REG(priv->rx_chan));
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IRMASK_REG(priv->tx_chan));
enet_dmac_writel(priv, priv->dma_chan_int_mask,
ENETDMAC_IRMASK, priv->rx_chan);
enet_dmac_writel(priv, priv->dma_chan_int_mask,
ENETDMAC_IRMASK, priv->tx_chan);
return rx_work_done;
}
@ -554,8 +560,8 @@ static irqreturn_t bcm_enet_isr_dma(int irq, void *dev_id)
priv = netdev_priv(dev);
/* mask rx/tx interrupts */
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
napi_schedule(&priv->napi);
@ -616,14 +622,14 @@ static int bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
DMA_TO_DEVICE);
len_stat = (skb->len << DMADESC_LENGTH_SHIFT) & DMADESC_LENGTH_MASK;
len_stat |= DMADESC_ESOP_MASK |
len_stat |= (DMADESC_ESOP_MASK >> priv->dma_desc_shift) |
DMADESC_APPEND_CRC |
DMADESC_OWNER_MASK;
priv->tx_curr_desc++;
if (priv->tx_curr_desc == priv->tx_ring_size) {
priv->tx_curr_desc = 0;
len_stat |= DMADESC_WRAP_MASK;
len_stat |= (DMADESC_WRAP_MASK >> priv->dma_desc_shift);
}
priv->tx_desc_count--;
@ -634,8 +640,8 @@ static int bcm_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
wmb();
/* kick tx dma */
enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
ENETDMAC_CHANCFG_REG(priv->tx_chan));
enet_dmac_writel(priv, priv->dma_chan_en_mask,
ENETDMAC_CHANCFG, priv->tx_chan);
/* stop queue if no more desc available */
if (!priv->tx_desc_count)
@ -763,6 +769,9 @@ static void bcm_enet_set_flow(struct bcm_enet_priv *priv, int rx_en, int tx_en)
val &= ~ENET_RXCFG_ENFLOW_MASK;
enet_writel(priv, val, ENET_RXCFG_REG);
if (!priv->dma_has_sram)
return;
/* tx flow control (pause frame generation) */
val = enet_dma_readl(priv, ENETDMA_CFG_REG);
if (tx_en)
@ -910,8 +919,8 @@ static int bcm_enet_open(struct net_device *dev)
/* mask all interrupts and request them */
enet_writel(priv, 0, ENET_IRMASK_REG);
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
ret = request_irq(dev->irq, bcm_enet_isr_mac, 0, dev->name, dev);
if (ret)
@ -986,8 +995,12 @@ static int bcm_enet_open(struct net_device *dev)
priv->rx_curr_desc = 0;
/* initialize flow control buffer allocation */
enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
ENETDMA_BUFALLOC_REG(priv->rx_chan));
if (priv->dma_has_sram)
enet_dma_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
ENETDMA_BUFALLOC_REG(priv->rx_chan));
else
enet_dmac_writel(priv, ENETDMA_BUFALLOC_FORCE_MASK | 0,
ENETDMAC_BUFALLOC, priv->rx_chan);
if (bcm_enet_refill_rx(dev)) {
dev_err(kdev, "cannot allocate rx skb queue\n");
@ -996,18 +1009,30 @@ static int bcm_enet_open(struct net_device *dev)
}
/* write rx & tx ring addresses */
enet_dmas_writel(priv, priv->rx_desc_dma,
ENETDMAS_RSTART_REG(priv->rx_chan));
enet_dmas_writel(priv, priv->tx_desc_dma,
ENETDMAS_RSTART_REG(priv->tx_chan));
if (priv->dma_has_sram) {
enet_dmas_writel(priv, priv->rx_desc_dma,
ENETDMAS_RSTART_REG, priv->rx_chan);
enet_dmas_writel(priv, priv->tx_desc_dma,
ENETDMAS_RSTART_REG, priv->tx_chan);
} else {
enet_dmac_writel(priv, priv->rx_desc_dma,
ENETDMAC_RSTART, priv->rx_chan);
enet_dmac_writel(priv, priv->tx_desc_dma,
ENETDMAC_RSTART, priv->tx_chan);
}
/* clear remaining state ram for rx & tx channel */
enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG(priv->rx_chan));
enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG(priv->tx_chan));
enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG(priv->rx_chan));
enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG(priv->tx_chan));
enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG(priv->rx_chan));
enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG(priv->tx_chan));
if (priv->dma_has_sram) {
enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
} else {
enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->rx_chan);
enet_dmac_writel(priv, 0, ENETDMAC_FC, priv->tx_chan);
}
/* set max rx/tx length */
enet_writel(priv, priv->hw_mtu, ENET_RXMAXLEN_REG);
@ -1015,18 +1040,24 @@ static int bcm_enet_open(struct net_device *dev)
/* set dma maximum burst len */
enet_dmac_writel(priv, priv->dma_maxburst,
ENETDMAC_MAXBURST_REG(priv->rx_chan));
ENETDMAC_MAXBURST, priv->rx_chan);
enet_dmac_writel(priv, priv->dma_maxburst,
ENETDMAC_MAXBURST_REG(priv->tx_chan));
ENETDMAC_MAXBURST, priv->tx_chan);
/* set correct transmit fifo watermark */
enet_writel(priv, BCMENET_TX_FIFO_TRESH, ENET_TXWMARK_REG);
/* set flow control low/high threshold to 1/3 / 2/3 */
val = priv->rx_ring_size / 3;
enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
val = (priv->rx_ring_size * 2) / 3;
enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
if (priv->dma_has_sram) {
val = priv->rx_ring_size / 3;
enet_dma_writel(priv, val, ENETDMA_FLOWCL_REG(priv->rx_chan));
val = (priv->rx_ring_size * 2) / 3;
enet_dma_writel(priv, val, ENETDMA_FLOWCH_REG(priv->rx_chan));
} else {
enet_dmac_writel(priv, 5, ENETDMAC_FC, priv->rx_chan);
enet_dmac_writel(priv, priv->rx_ring_size, ENETDMAC_LEN, priv->rx_chan);
enet_dmac_writel(priv, priv->tx_ring_size, ENETDMAC_LEN, priv->tx_chan);
}
/* all set, enable mac and interrupts, start dma engine and
* kick rx dma channel */
@ -1035,26 +1066,26 @@ static int bcm_enet_open(struct net_device *dev)
val |= ENET_CTL_ENABLE_MASK;
enet_writel(priv, val, ENET_CTL_REG);
enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
ENETDMAC_CHANCFG_REG(priv->rx_chan));
enet_dmac_writel(priv, priv->dma_chan_en_mask,
ENETDMAC_CHANCFG, priv->rx_chan);
/* watch "mib counters about to overflow" interrupt */
enet_writel(priv, ENET_IR_MIB, ENET_IR_REG);
enet_writel(priv, ENET_IR_MIB, ENET_IRMASK_REG);
/* watch "packet transferred" interrupt in rx and tx */
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IR_REG(priv->rx_chan));
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IR_REG(priv->tx_chan));
enet_dmac_writel(priv, priv->dma_chan_int_mask,
ENETDMAC_IR, priv->rx_chan);
enet_dmac_writel(priv, priv->dma_chan_int_mask,
ENETDMAC_IR, priv->tx_chan);
/* make sure we enable napi before rx interrupt */
napi_enable(&priv->napi);
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IRMASK_REG(priv->rx_chan));
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IRMASK_REG(priv->tx_chan));
enet_dmac_writel(priv, priv->dma_chan_int_mask,
ENETDMAC_IRMASK, priv->rx_chan);
enet_dmac_writel(priv, priv->dma_chan_int_mask,
ENETDMAC_IRMASK, priv->tx_chan);
if (priv->has_phy)
phy_start(priv->phydev);
@ -1134,13 +1165,13 @@ static void bcm_enet_disable_dma(struct bcm_enet_priv *priv, int chan)
{
int limit;
enet_dmac_writel(priv, 0, ENETDMAC_CHANCFG_REG(chan));
enet_dmac_writel(priv, 0, ENETDMAC_CHANCFG, chan);
limit = 1000;
do {
u32 val;
val = enet_dmac_readl(priv, ENETDMAC_CHANCFG_REG(chan));
val = enet_dmac_readl(priv, ENETDMAC_CHANCFG, chan);
if (!(val & ENETDMAC_CHANCFG_EN_MASK))
break;
udelay(1);
@ -1167,8 +1198,8 @@ static int bcm_enet_stop(struct net_device *dev)
/* mask all interrupts */
enet_writel(priv, 0, ENET_IRMASK_REG);
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
/* make sure no mib update is scheduled */
cancel_work_sync(&priv->mib_update_task);
@ -1782,6 +1813,11 @@ static int bcm_enet_probe(struct platform_device *pdev)
priv->pause_tx = pd->pause_tx;
priv->force_duplex_full = pd->force_duplex_full;
priv->force_speed_100 = pd->force_speed_100;
priv->dma_chan_en_mask = pd->dma_chan_en_mask;
priv->dma_chan_int_mask = pd->dma_chan_int_mask;
priv->dma_chan_width = pd->dma_chan_width;
priv->dma_has_sram = pd->dma_has_sram;
priv->dma_desc_shift = pd->dma_desc_shift;
}
if (priv->mac_id == 0 && priv->has_phy && !priv->use_external_mii) {
@ -2118,8 +2154,8 @@ static int bcm_enetsw_open(struct net_device *dev)
kdev = &priv->pdev->dev;
/* mask all interrupts and request them */
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
ret = request_irq(priv->irq_rx, bcm_enet_isr_dma,
IRQF_DISABLED, dev->name, dev);
@ -2231,23 +2267,23 @@ static int bcm_enetsw_open(struct net_device *dev)
/* write rx & tx ring addresses */
enet_dmas_writel(priv, priv->rx_desc_dma,
ENETDMAS_RSTART_REG(priv->rx_chan));
ENETDMAS_RSTART_REG, priv->rx_chan);
enet_dmas_writel(priv, priv->tx_desc_dma,
ENETDMAS_RSTART_REG(priv->tx_chan));
ENETDMAS_RSTART_REG, priv->tx_chan);
/* clear remaining state ram for rx & tx channel */
enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG(priv->rx_chan));
enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG(priv->tx_chan));
enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG(priv->rx_chan));
enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG(priv->tx_chan));
enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG(priv->rx_chan));
enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG(priv->tx_chan));
enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->rx_chan);
enet_dmas_writel(priv, 0, ENETDMAS_SRAM2_REG, priv->tx_chan);
enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->rx_chan);
enet_dmas_writel(priv, 0, ENETDMAS_SRAM3_REG, priv->tx_chan);
enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->rx_chan);
enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG, priv->tx_chan);
/* set dma maximum burst len */
enet_dmac_writel(priv, priv->dma_maxburst,
ENETDMAC_MAXBURST_REG(priv->rx_chan));
ENETDMAC_MAXBURST, priv->rx_chan);
enet_dmac_writel(priv, priv->dma_maxburst,
ENETDMAC_MAXBURST_REG(priv->tx_chan));
ENETDMAC_MAXBURST, priv->tx_chan);
/* set flow control low/high threshold to 1/3 / 2/3 */
val = priv->rx_ring_size / 3;
@ -2261,21 +2297,21 @@ static int bcm_enetsw_open(struct net_device *dev)
wmb();
enet_dma_writel(priv, ENETDMA_CFG_EN_MASK, ENETDMA_CFG_REG);
enet_dmac_writel(priv, ENETDMAC_CHANCFG_EN_MASK,
ENETDMAC_CHANCFG_REG(priv->rx_chan));
ENETDMAC_CHANCFG, priv->rx_chan);
/* watch "packet transferred" interrupt in rx and tx */
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IR_REG(priv->rx_chan));
ENETDMAC_IR, priv->rx_chan);
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IR_REG(priv->tx_chan));
ENETDMAC_IR, priv->tx_chan);
/* make sure we enable napi before rx interrupt */
napi_enable(&priv->napi);
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IRMASK_REG(priv->rx_chan));
ENETDMAC_IRMASK, priv->rx_chan);
enet_dmac_writel(priv, ENETDMAC_IR_PKTDONE_MASK,
ENETDMAC_IRMASK_REG(priv->tx_chan));
ENETDMAC_IRMASK, priv->tx_chan);
netif_carrier_on(dev);
netif_start_queue(dev);
@ -2377,8 +2413,8 @@ static int bcm_enetsw_stop(struct net_device *dev)
del_timer_sync(&priv->rx_timeout);
/* mask all interrupts */
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->rx_chan));
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK_REG(priv->tx_chan));
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->rx_chan);
enet_dmac_writel(priv, 0, ENETDMAC_IRMASK, priv->tx_chan);
/* disable dma & mac */
bcm_enet_disable_dma(priv, priv->tx_chan);
@ -2712,6 +2748,10 @@ static int bcm_enetsw_probe(struct platform_device *pdev)
memcpy(priv->used_ports, pd->used_ports,
sizeof(pd->used_ports));
priv->num_ports = pd->num_ports;
priv->dma_has_sram = pd->dma_has_sram;
priv->dma_chan_en_mask = pd->dma_chan_en_mask;
priv->dma_chan_int_mask = pd->dma_chan_int_mask;
priv->dma_chan_width = pd->dma_chan_width;
}
ret = compute_hw_mtu(priv, dev->mtu);

15
drivers/net/ethernet/broadcom/bcm63xx_enet.h
View File

@ -339,6 +339,21 @@ struct bcm_enet_priv {
/* used to poll switch port state */
struct timer_list swphy_poll;
spinlock_t enetsw_mdio_lock;
/* dma channel enable mask */
u32 dma_chan_en_mask;
/* dma channel interrupt mask */
u32 dma_chan_int_mask;
/* DMA engine has internal SRAM */
bool dma_has_sram;
/* dma channel width */
unsigned int dma_chan_width;
/* dma descriptor shift value */
unsigned int dma_desc_shift;
};