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Revert "Add non-Virtex5 support for LL TEMAC driver"

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This reverts commit 4595691455.

Uses virt_to_bus() and breaks the build.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2010-04-07 23:28:28 -07:00
parent 97f8aefbbf
commit 4d8dc67908
4 changed files with 38 additions and 126 deletions
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11
arch/microblaze/include/asm/system.h
View File

@ -12,7 +12,6 @@
#include <asm/registers.h>
#include <asm/setup.h>
#include <asm/irqflags.h>
#include <asm/cache.h>
#include <asm-generic/cmpxchg.h>
#include <asm-generic/cmpxchg-local.h>
@ -97,14 +96,4 @@ extern struct dentry *of_debugfs_root;
#define arch_align_stack(x) (x)
/*
* MicroBlaze doesn't handle unaligned accesses in hardware.
*
* Based on this we force the IP header alignment in network drivers.
* We also modify NET_SKB_PAD to be a cacheline in size, thus maintaining
* cacheline alignment of buffers.
*/
#define NET_IP_ALIGN 2
#define NET_SKB_PAD L1_CACHE_BYTES
#endif /* _ASM_MICROBLAZE_SYSTEM_H */

2
drivers/net/Kconfig
View File

@ -2435,8 +2435,8 @@ config MV643XX_ETH
config XILINX_LL_TEMAC
tristate "Xilinx LL TEMAC (LocalLink Tri-mode Ethernet MAC) driver"
depends on PPC || MICROBLAZE
select PHYLIB
depends on PPC_DCR_NATIVE
help
This driver supports the Xilinx 10/100/1000 LocalLink TEMAC
core used in Xilinx Spartan and Virtex FPGAs

14
drivers/net/ll_temac.h
View File

@ -5,11 +5,8 @@
#include <linux/netdevice.h>
#include <linux/of.h>
#include <linux/spinlock.h>
#ifdef CONFIG_PPC_DCR
#include <asm/dcr.h>
#include <asm/dcr-regs.h>
#endif
/* packet size info */
#define XTE_HDR_SIZE 14 /* size of Ethernet header */
@ -293,6 +290,9 @@ This option defaults to enabled (set) */
#define TX_CONTROL_CALC_CSUM_MASK 1
#define XTE_ALIGN 32
#define BUFFER_ALIGN(adr) ((XTE_ALIGN - ((u32) adr)) % XTE_ALIGN)
#define MULTICAST_CAM_TABLE_NUM 4
/* TX/RX CURDESC_PTR points to first descriptor */
@ -335,15 +335,9 @@ struct temac_local {
struct mii_bus *mii_bus; /* MII bus reference */
int mdio_irqs[PHY_MAX_ADDR]; /* IRQs table for MDIO bus */
/* IO registers, dma functions and IRQs */
/* IO registers and IRQs */
void __iomem *regs;
void __iomem *sdma_regs;
#ifdef CONFIG_PPC_DCR
dcr_host_t sdma_dcrs;
#endif
u32 (*dma_in)(struct temac_local *, int);
void (*dma_out)(struct temac_local *, int, u32);
int tx_irq;
int rx_irq;
int emac_num;

137
drivers/net/ll_temac_main.c
View File

@ -20,6 +20,9 @@
* or rx, so this should be okay.
*
* TODO:
* - Fix driver to work on more than just Virtex5. Right now the driver
* assumes that the locallink DMA registers are accessed via DCR
* instructions.
* - Factor out locallink DMA code into separate driver
* - Fix multicast assignment.
* - Fix support for hardware checksumming.
@ -112,85 +115,16 @@ void temac_indirect_out32(struct temac_local *lp, int reg, u32 value)
temac_iow(lp, XTE_CTL0_OFFSET, CNTLREG_WRITE_ENABLE_MASK | reg);
}
/**
* temac_dma_in32 - Memory mapped DMA read, this function expects a
* register input that is based on DCR word addresses which
* are then converted to memory mapped byte addresses
*/
static u32 temac_dma_in32(struct temac_local *lp, int reg)
{
return in_be32((u32 *)(lp->sdma_regs + (reg << 2)));
}
/**
* temac_dma_out32 - Memory mapped DMA read, this function expects a
* register input that is based on DCR word addresses which
* are then converted to memory mapped byte addresses
*/
static void temac_dma_out32(struct temac_local *lp, int reg, u32 value)
{
out_be32((u32 *)(lp->sdma_regs + (reg << 2)), value);
}
/* DMA register access functions can be DCR based or memory mapped.
* The PowerPC 440 is DCR based, the PowerPC 405 and MicroBlaze are both
* memory mapped.
*/
#ifdef CONFIG_PPC_DCR
/**
* temac_dma_dcr_in32 - DCR based DMA read
*/
static u32 temac_dma_dcr_in(struct temac_local *lp, int reg)
{
return dcr_read(lp->sdma_dcrs, reg);
}
/**
* temac_dma_dcr_out32 - DCR based DMA write
*/
static void temac_dma_dcr_out(struct temac_local *lp, int reg, u32 value)
static void temac_dma_out32(struct temac_local *lp, int reg, u32 value)
{
dcr_write(lp->sdma_dcrs, reg, value);
}
/**
* temac_dcr_setup - If the DMA is DCR based, then setup the address and
* I/O functions
*/
static int temac_dcr_setup(struct temac_local *lp, struct of_device *op,
struct device_node *np)
{
unsigned int dcrs;
/* setup the dcr address mapping if it's in the device tree */
dcrs = dcr_resource_start(np, 0);
if (dcrs != 0) {
lp->sdma_dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0));
lp->dma_in = temac_dma_dcr_in;
lp->dma_out = temac_dma_dcr_out;
dev_dbg(&op->dev, "DCR base: %x\n", dcrs);
return 0;
}
/* no DCR in the device tree, indicate a failure */
return -1;
}
#else
/*
* temac_dcr_setup - This is a stub for when DCR is not supported,
* such as with MicroBlaze
*/
static int temac_dcr_setup(struct temac_local *lp, struct of_device *op,
struct device_node *np)
{
return -1;
}
#endif
/**
* temac_dma_bd_init - Setup buffer descriptor rings
*/
@ -221,14 +155,14 @@ static int temac_dma_bd_init(struct net_device *ndev)
lp->rx_bd_v[i].next = lp->rx_bd_p +
sizeof(*lp->rx_bd_v) * ((i + 1) % RX_BD_NUM);
skb = netdev_alloc_skb_ip_align(ndev,
XTE_MAX_JUMBO_FRAME_SIZE);
skb = alloc_skb(XTE_MAX_JUMBO_FRAME_SIZE
+ XTE_ALIGN, GFP_ATOMIC);
if (skb == 0) {
dev_err(&ndev->dev, "alloc_skb error %d\n", i);
return -1;
}
lp->rx_skb[i] = skb;
skb_reserve(skb, BUFFER_ALIGN(skb->data));
/* returns physical address of skb->data */
lp->rx_bd_v[i].phys = dma_map_single(ndev->dev.parent,
skb->data,
@ -238,23 +172,23 @@ static int temac_dma_bd_init(struct net_device *ndev)
lp->rx_bd_v[i].app0 = STS_CTRL_APP0_IRQONEND;
}
lp->dma_out(lp, TX_CHNL_CTRL, 0x10220400 |
temac_dma_out32(lp, TX_CHNL_CTRL, 0x10220400 |
CHNL_CTRL_IRQ_EN |
CHNL_CTRL_IRQ_DLY_EN |
CHNL_CTRL_IRQ_COAL_EN);
/* 0x10220483 */
/* 0x00100483 */
lp->dma_out(lp, RX_CHNL_CTRL, 0xff010000 |
temac_dma_out32(lp, RX_CHNL_CTRL, 0xff010000 |
CHNL_CTRL_IRQ_EN |
CHNL_CTRL_IRQ_DLY_EN |
CHNL_CTRL_IRQ_COAL_EN |
CHNL_CTRL_IRQ_IOE);
/* 0xff010283 */
lp->dma_out(lp, RX_CURDESC_PTR, lp->rx_bd_p);
lp->dma_out(lp, RX_TAILDESC_PTR,
temac_dma_out32(lp, RX_CURDESC_PTR, lp->rx_bd_p);
temac_dma_out32(lp, RX_TAILDESC_PTR,
lp->rx_bd_p + (sizeof(*lp->rx_bd_v) * (RX_BD_NUM - 1)));
lp->dma_out(lp, TX_CURDESC_PTR, lp->tx_bd_p);
temac_dma_out32(lp, TX_CURDESC_PTR, lp->tx_bd_p);
return 0;
}
@ -492,9 +426,9 @@ static void temac_device_reset(struct net_device *ndev)
temac_indirect_out32(lp, XTE_RXC1_OFFSET, val & ~XTE_RXC1_RXEN_MASK);
/* Reset Local Link (DMA) */
lp->dma_out(lp, DMA_CONTROL_REG, DMA_CONTROL_RST);
temac_dma_out32(lp, DMA_CONTROL_REG, DMA_CONTROL_RST);
timeout = 1000;
while (lp->dma_in(lp, DMA_CONTROL_REG) & DMA_CONTROL_RST) {
while (temac_dma_in32(lp, DMA_CONTROL_REG) & DMA_CONTROL_RST) {
udelay(1);
if (--timeout == 0) {
dev_err(&ndev->dev,
@ -502,7 +436,7 @@ static void temac_device_reset(struct net_device *ndev)
break;
}
}
lp->dma_out(lp, DMA_CONTROL_REG, DMA_TAIL_ENABLE);
temac_dma_out32(lp, DMA_CONTROL_REG, DMA_TAIL_ENABLE);
temac_dma_bd_init(ndev);
@ -663,7 +597,7 @@ static int temac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
lp->tx_bd_tail = 0;
/* Kick off the transfer */
lp->dma_out(lp, TX_TAILDESC_PTR, tail_p); /* DMA start */
temac_dma_out32(lp, TX_TAILDESC_PTR, tail_p); /* DMA start */
return NETDEV_TX_OK;
}
@ -705,15 +639,16 @@ static void ll_temac_recv(struct net_device *ndev)
ndev->stats.rx_packets++;
ndev->stats.rx_bytes += length;
new_skb = netdev_alloc_skb_ip_align(ndev,
XTE_MAX_JUMBO_FRAME_SIZE);
new_skb = alloc_skb(XTE_MAX_JUMBO_FRAME_SIZE + XTE_ALIGN,
GFP_ATOMIC);
if (new_skb == 0) {
dev_err(&ndev->dev, "no memory for new sk_buff\n");
spin_unlock_irqrestore(&lp->rx_lock, flags);
return;
}
skb_reserve(new_skb, BUFFER_ALIGN(new_skb->data));
cur_p->app0 = STS_CTRL_APP0_IRQONEND;
cur_p->phys = dma_map_single(ndev->dev.parent, new_skb->data,
XTE_MAX_JUMBO_FRAME_SIZE,
@ -728,7 +663,7 @@ static void ll_temac_recv(struct net_device *ndev)
cur_p = &lp->rx_bd_v[lp->rx_bd_ci];
bdstat = cur_p->app0;
}
lp->dma_out(lp, RX_TAILDESC_PTR, tail_p);
temac_dma_out32(lp, RX_TAILDESC_PTR, tail_p);
spin_unlock_irqrestore(&lp->rx_lock, flags);
}
@ -739,8 +674,8 @@ static irqreturn_t ll_temac_tx_irq(int irq, void *_ndev)
struct temac_local *lp = netdev_priv(ndev);
unsigned int status;
status = lp->dma_in(lp, TX_IRQ_REG);
lp->dma_out(lp, TX_IRQ_REG, status);
status = temac_dma_in32(lp, TX_IRQ_REG);
temac_dma_out32(lp, TX_IRQ_REG, status);
if (status & (IRQ_COAL | IRQ_DLY))
temac_start_xmit_done(lp->ndev);
@ -757,8 +692,8 @@ static irqreturn_t ll_temac_rx_irq(int irq, void *_ndev)
unsigned int status;
/* Read and clear the status registers */
status = lp->dma_in(lp, RX_IRQ_REG);
lp->dma_out(lp, RX_IRQ_REG, status);
status = temac_dma_in32(lp, RX_IRQ_REG);
temac_dma_out32(lp, RX_IRQ_REG, status);
if (status & (IRQ_COAL | IRQ_DLY))
ll_temac_recv(lp->ndev);
@ -859,7 +794,7 @@ static ssize_t temac_show_llink_regs(struct device *dev,
int i, len = 0;
for (i = 0; i < 0x11; i++)
len += sprintf(buf + len, "%.8x%s", lp->dma_in(lp, i),
len += sprintf(buf + len, "%.8x%s", temac_dma_in32(lp, i),
(i % 8) == 7 ? "\n" : " ");
len += sprintf(buf + len, "\n");
@ -885,6 +820,7 @@ temac_of_probe(struct of_device *op, const struct of_device_id *match)
struct net_device *ndev;
const void *addr;
int size, rc = 0;
unsigned int dcrs;
/* Init network device structure */
ndev = alloc_etherdev(sizeof(*lp));
@ -934,20 +870,13 @@ temac_of_probe(struct of_device *op, const struct of_device_id *match)
goto nodev;
}
/* Setup the DMA register accesses, could be DCR or memory mapped */
if (temac_dcr_setup(lp, op, np)) {
/* no DCR in the device tree, try non-DCR */
lp->sdma_regs = of_iomap(np, 0);
if (lp->sdma_regs) {
lp->dma_in = temac_dma_in32;
lp->dma_out = temac_dma_out32;
dev_dbg(&op->dev, "MEM base: %p\n", lp->sdma_regs);
} else {
dev_err(&op->dev, "unable to map DMA registers\n");
goto nodev;
}
dcrs = dcr_resource_start(np, 0);
if (dcrs == 0) {
dev_err(&op->dev, "could not get DMA register address\n");
goto nodev;
}
lp->sdma_dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0));
dev_dbg(&op->dev, "DCR base: %x\n", dcrs);
lp->rx_irq = irq_of_parse_and_map(np, 0);
lp->tx_irq = irq_of_parse_and_map(np, 1);