mirror of
https://github.com/torvalds/linux.git
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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1570 lines
40 KiB
C
1570 lines
40 KiB
C
/*
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* Copyright 2000, 2001 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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* stevel@mvista.com or source@mvista.com
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Ethernet driver for the MIPS GT96100 Advanced Communication Controller.
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*
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* Revision history
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*
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* 11.11.2001 Moved to 2.4.14, ppopov@mvista.com. Modified driver to add
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* proper gt96100A support.
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* 12.05.2001 Moved eth port 0 to irq 3 (mapped to GT_SERINT0 on EV96100A)
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* in order for both ports to work. Also cleaned up boot
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* option support (mac address string parsing), fleshed out
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* gt96100_cleanup_module(), and other general code cleanups
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* <stevel@mvista.com>.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/errno.h>
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#include <linux/in.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/delay.h>
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#include <linux/ctype.h>
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#include <linux/bitops.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#define DESC_BE 1
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#define DESC_DATA_BE 1
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#define GT96100_DEBUG 2
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#include "gt96100eth.h"
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// prototypes
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static void* dmaalloc(size_t size, dma_addr_t *dma_handle);
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static void dmafree(size_t size, void *vaddr);
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static void gt96100_delay(int msec);
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static int gt96100_add_hash_entry(struct net_device *dev,
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unsigned char* addr);
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static void read_mib_counters(struct gt96100_private *gp);
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static int read_MII(int phy_addr, u32 reg);
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static int write_MII(int phy_addr, u32 reg, u16 data);
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static int gt96100_init_module(void);
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static void gt96100_cleanup_module(void);
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static void dump_MII(int dbg_lvl, struct net_device *dev);
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static void dump_tx_desc(int dbg_lvl, struct net_device *dev, int i);
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static void dump_rx_desc(int dbg_lvl, struct net_device *dev, int i);
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static void dump_skb(int dbg_lvl, struct net_device *dev,
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struct sk_buff *skb);
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static void dump_hw_addr(int dbg_lvl, struct net_device *dev,
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const char* pfx, unsigned char* addr_str);
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static void update_stats(struct gt96100_private *gp);
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static void abort(struct net_device *dev, u32 abort_bits);
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static void hard_stop(struct net_device *dev);
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static void enable_ether_irq(struct net_device *dev);
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static void disable_ether_irq(struct net_device *dev);
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static int gt96100_probe1(struct pci_dev *pci, int port_num);
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static void reset_tx(struct net_device *dev);
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static void reset_rx(struct net_device *dev);
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static int gt96100_check_tx_consistent(struct gt96100_private *gp);
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static int gt96100_init(struct net_device *dev);
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static int gt96100_open(struct net_device *dev);
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static int gt96100_close(struct net_device *dev);
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static int gt96100_tx(struct sk_buff *skb, struct net_device *dev);
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static int gt96100_rx(struct net_device *dev, u32 status);
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static irqreturn_t gt96100_interrupt(int irq, void *dev_id, struct pt_regs *regs);
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static void gt96100_tx_timeout(struct net_device *dev);
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static void gt96100_set_rx_mode(struct net_device *dev);
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static struct net_device_stats* gt96100_get_stats(struct net_device *dev);
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extern char * __init prom_getcmdline(void);
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static int max_interrupt_work = 32;
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#define nibswap(x) ((((x) >> 4) & 0x0f) | (((x) << 4) & 0xf0))
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#define RUN_AT(x) (jiffies + (x))
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// For reading/writing 32-bit words and half-words from/to DMA memory
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#ifdef DESC_BE
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#define cpu_to_dma32 cpu_to_be32
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#define dma32_to_cpu be32_to_cpu
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#define cpu_to_dma16 cpu_to_be16
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#define dma16_to_cpu be16_to_cpu
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#else
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#define cpu_to_dma32 cpu_to_le32
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#define dma32_to_cpu le32_to_cpu
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#define cpu_to_dma16 cpu_to_le16
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#define dma16_to_cpu le16_to_cpu
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#endif
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static char mac0[18] = "00.02.03.04.05.06";
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static char mac1[18] = "00.01.02.03.04.05";
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MODULE_PARM(mac0, "c18");
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MODULE_PARM(mac1, "c18");
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MODULE_PARM_DESC(mac0, "MAC address for GT96100 ethernet port 0");
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MODULE_PARM_DESC(mac1, "MAC address for GT96100 ethernet port 1");
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/*
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* Info for the GT96100 ethernet controller's ports.
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*/
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static struct gt96100_if_t {
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struct net_device *dev;
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unsigned int iobase; // IO Base address of this port
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int irq; // IRQ number of this port
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char *mac_str;
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} gt96100_iflist[NUM_INTERFACES] = {
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{
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NULL,
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GT96100_ETH0_BASE, GT96100_ETHER0_IRQ,
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mac0
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},
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{
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NULL,
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GT96100_ETH1_BASE, GT96100_ETHER1_IRQ,
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mac1
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}
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};
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static inline const char*
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chip_name(int chip_rev)
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{
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switch (chip_rev) {
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case REV_GT96100:
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return "GT96100";
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case REV_GT96100A_1:
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case REV_GT96100A:
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return "GT96100A";
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default:
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return "Unknown GT96100";
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}
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}
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/*
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DMA memory allocation, derived from pci_alloc_consistent.
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*/
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static void * dmaalloc(size_t size, dma_addr_t *dma_handle)
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{
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void *ret;
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ret = (void *)__get_free_pages(GFP_ATOMIC | GFP_DMA, get_order(size));
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if (ret != NULL) {
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dma_cache_inv((unsigned long)ret, size);
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if (dma_handle != NULL)
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*dma_handle = virt_to_phys(ret);
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/* bump virtual address up to non-cached area */
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ret = (void*)KSEG1ADDR(ret);
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}
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return ret;
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}
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static void dmafree(size_t size, void *vaddr)
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{
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vaddr = (void*)KSEG0ADDR(vaddr);
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free_pages((unsigned long)vaddr, get_order(size));
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}
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static void gt96100_delay(int ms)
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{
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if (in_interrupt())
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return;
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else
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msleep_interruptible(ms);
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}
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static int
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parse_mac_addr(struct net_device *dev, char* macstr)
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{
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int i, j;
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unsigned char result, value;
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for (i=0; i<6; i++) {
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result = 0;
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if (i != 5 && *(macstr+2) != '.') {
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err(__FILE__ "invalid mac address format: %d %c\n",
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i, *(macstr+2));
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return -EINVAL;
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}
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for (j=0; j<2; j++) {
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if (isxdigit(*macstr) &&
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(value = isdigit(*macstr) ? *macstr-'0' :
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toupper(*macstr)-'A'+10) < 16) {
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result = result*16 + value;
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macstr++;
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} else {
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err(__FILE__ "invalid mac address "
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"character: %c\n", *macstr);
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return -EINVAL;
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}
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}
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macstr++; // step over '.'
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dev->dev_addr[i] = result;
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}
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return 0;
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}
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static int
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read_MII(int phy_addr, u32 reg)
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{
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int timedout = 20;
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u32 smir = smirOpCode | (phy_addr << smirPhyAdBit) |
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(reg << smirRegAdBit);
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// wait for last operation to complete
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while (GT96100_READ(GT96100_ETH_SMI_REG) & smirBusy) {
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// snooze for 1 msec and check again
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gt96100_delay(1);
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if (--timedout == 0) {
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printk(KERN_ERR "%s: busy timeout!!\n", __FUNCTION__);
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return -ENODEV;
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}
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}
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GT96100_WRITE(GT96100_ETH_SMI_REG, smir);
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timedout = 20;
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// wait for read to complete
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while (!((smir = GT96100_READ(GT96100_ETH_SMI_REG)) & smirReadValid)) {
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// snooze for 1 msec and check again
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gt96100_delay(1);
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if (--timedout == 0) {
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printk(KERN_ERR "%s: timeout!!\n", __FUNCTION__);
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return -ENODEV;
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}
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}
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return (int)(smir & smirDataMask);
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}
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static void
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dump_tx_desc(int dbg_lvl, struct net_device *dev, int i)
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{
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struct gt96100_private *gp = netdev_priv(dev);
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gt96100_td_t *td = &gp->tx_ring[i];
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dbg(dbg_lvl, "Tx descriptor at 0x%08lx:\n", virt_to_phys(td));
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dbg(dbg_lvl,
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" cmdstat=%04x, byte_cnt=%04x, buff_ptr=%04x, next=%04x\n",
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dma32_to_cpu(td->cmdstat),
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dma16_to_cpu(td->byte_cnt),
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dma32_to_cpu(td->buff_ptr),
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dma32_to_cpu(td->next));
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}
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static void
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dump_rx_desc(int dbg_lvl, struct net_device *dev, int i)
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{
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struct gt96100_private *gp = netdev_priv(dev);
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gt96100_rd_t *rd = &gp->rx_ring[i];
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dbg(dbg_lvl, "Rx descriptor at 0x%08lx:\n", virt_to_phys(rd));
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dbg(dbg_lvl, " cmdstat=%04x, buff_sz=%04x, byte_cnt=%04x, "
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"buff_ptr=%04x, next=%04x\n",
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dma32_to_cpu(rd->cmdstat),
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dma16_to_cpu(rd->buff_sz),
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dma16_to_cpu(rd->byte_cnt),
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dma32_to_cpu(rd->buff_ptr),
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dma32_to_cpu(rd->next));
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}
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static int
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write_MII(int phy_addr, u32 reg, u16 data)
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{
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int timedout = 20;
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u32 smir = (phy_addr << smirPhyAdBit) |
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(reg << smirRegAdBit) | data;
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// wait for last operation to complete
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while (GT96100_READ(GT96100_ETH_SMI_REG) & smirBusy) {
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// snooze for 1 msec and check again
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gt96100_delay(1);
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if (--timedout == 0) {
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printk(KERN_ERR "%s: busy timeout!!\n", __FUNCTION__);
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return -1;
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}
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}
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GT96100_WRITE(GT96100_ETH_SMI_REG, smir);
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return 0;
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}
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static void
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dump_MII(int dbg_lvl, struct net_device *dev)
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{
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int i, val;
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struct gt96100_private *gp = netdev_priv(dev);
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if (dbg_lvl <= GT96100_DEBUG) {
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for (i=0; i<7; i++) {
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if ((val = read_MII(gp->phy_addr, i)) >= 0)
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printk("MII Reg %d=%x\n", i, val);
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}
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for (i=16; i<21; i++) {
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if ((val = read_MII(gp->phy_addr, i)) >= 0)
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printk("MII Reg %d=%x\n", i, val);
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}
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}
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}
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static void
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dump_hw_addr(int dbg_lvl, struct net_device *dev, const char* pfx,
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unsigned char* addr_str)
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{
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int i;
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char buf[100], octet[5];
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if (dbg_lvl <= GT96100_DEBUG) {
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strcpy(buf, pfx);
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for (i = 0; i < 6; i++) {
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sprintf(octet, "%2.2x%s",
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addr_str[i], i<5 ? ":" : "\n");
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strcat(buf, octet);
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}
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info("%s", buf);
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}
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}
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static void
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dump_skb(int dbg_lvl, struct net_device *dev, struct sk_buff *skb)
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{
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int i;
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unsigned char* skbdata;
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if (dbg_lvl <= GT96100_DEBUG) {
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dbg(dbg_lvl, "%s: skb=%p, skb->data=%p, skb->len=%d\n",
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__FUNCTION__, skb, skb->data, skb->len);
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skbdata = (unsigned char*)KSEG1ADDR(skb->data);
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for (i=0; i<skb->len; i++) {
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if (!(i % 16))
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printk(KERN_DEBUG "\n %3.3x: %2.2x,",
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i, skbdata[i]);
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else
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printk(KERN_DEBUG "%2.2x,", skbdata[i]);
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}
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printk(KERN_DEBUG "\n");
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}
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}
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static int
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gt96100_add_hash_entry(struct net_device *dev, unsigned char* addr)
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{
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struct gt96100_private *gp = netdev_priv(dev);
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//u16 hashResult, stmp;
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//unsigned char ctmp, hash_ea[6];
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u32 tblEntry1, tblEntry0, *tblEntryAddr;
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int i;
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tblEntry1 = hteValid | hteRD;
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tblEntry1 |= (u32)addr[5] << 3;
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tblEntry1 |= (u32)addr[4] << 11;
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tblEntry1 |= (u32)addr[3] << 19;
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tblEntry1 |= ((u32)addr[2] & 0x1f) << 27;
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dbg(3, "%s: tblEntry1=%x\n", __FUNCTION__, tblEntry1);
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tblEntry0 = ((u32)addr[2] >> 5) & 0x07;
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tblEntry0 |= (u32)addr[1] << 3;
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tblEntry0 |= (u32)addr[0] << 11;
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dbg(3, "%s: tblEntry0=%x\n", __FUNCTION__, tblEntry0);
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#if 0
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for (i=0; i<6; i++) {
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// nibble swap
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ctmp = nibswap(addr[i]);
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// invert every nibble
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hash_ea[i] = ((ctmp&1)<<3) | ((ctmp&8)>>3) |
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((ctmp&2)<<1) | ((ctmp&4)>>1);
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hash_ea[i] |= ((ctmp&0x10)<<3) | ((ctmp&0x80)>>3) |
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((ctmp&0x20)<<1) | ((ctmp&0x40)>>1);
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}
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dump_hw_addr(3, dev, "%s: nib swap/invt addr=", __FUNCTION__, hash_ea);
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if (gp->hash_mode == 0) {
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hashResult = ((u16)hash_ea[0] & 0xfc) << 7;
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stmp = ((u16)hash_ea[0] & 0x03) |
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(((u16)hash_ea[1] & 0x7f) << 2);
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stmp ^= (((u16)hash_ea[1] >> 7) & 0x01) |
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((u16)hash_ea[2] << 1);
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stmp ^= (u16)hash_ea[3] | (((u16)hash_ea[4] & 1) << 8);
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hashResult |= stmp;
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} else {
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return -1; // don't support hash mode 1
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}
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dbg(3, "%s: hashResult=%x\n", __FUNCTION__, hashResult);
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tblEntryAddr =
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(u32 *)(&gp->hash_table[((u32)hashResult & 0x7ff) << 3]);
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dbg(3, "%s: tblEntryAddr=%p\n", tblEntryAddr, __FUNCTION__);
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for (i=0; i<HASH_HOP_NUMBER; i++) {
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if ((*tblEntryAddr & hteValid) &&
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!(*tblEntryAddr & hteSkip)) {
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// This entry is already occupied, go to next entry
|
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tblEntryAddr += 2;
|
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dbg(3, "%s: skipping to %p\n", __FUNCTION__,
|
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tblEntryAddr);
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} else {
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memset(tblEntryAddr, 0, 8);
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tblEntryAddr[1] = cpu_to_dma32(tblEntry1);
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tblEntryAddr[0] = cpu_to_dma32(tblEntry0);
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break;
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}
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}
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|
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if (i >= HASH_HOP_NUMBER) {
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err("%s: expired!\n", __FUNCTION__);
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return -1; // Couldn't find an unused entry
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}
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|
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#else
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tblEntryAddr = (u32 *)gp->hash_table;
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for (i=0; i<RX_HASH_TABLE_SIZE/4; i+=2) {
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tblEntryAddr[i+1] = cpu_to_dma32(tblEntry1);
|
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tblEntryAddr[i] = cpu_to_dma32(tblEntry0);
|
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}
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|
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#endif
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return 0;
|
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}
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|
|
|
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static void
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read_mib_counters(struct gt96100_private *gp)
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{
|
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u32* mib_regs = (u32*)&gp->mib;
|
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int i;
|
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|
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for (i=0; i<sizeof(mib_counters_t)/sizeof(u32); i++)
|
|
mib_regs[i] = GT96100ETH_READ(gp, GT96100_ETH_MIB_COUNT_BASE +
|
|
i*sizeof(u32));
|
|
}
|
|
|
|
|
|
static void
|
|
update_stats(struct gt96100_private *gp)
|
|
{
|
|
mib_counters_t *mib = &gp->mib;
|
|
struct net_device_stats *stats = &gp->stats;
|
|
|
|
read_mib_counters(gp);
|
|
|
|
stats->rx_packets = mib->totalFramesReceived;
|
|
stats->tx_packets = mib->framesSent;
|
|
stats->rx_bytes = mib->totalByteReceived;
|
|
stats->tx_bytes = mib->byteSent;
|
|
stats->rx_errors = mib->totalFramesReceived - mib->framesReceived;
|
|
//the tx error counters are incremented by the ISR
|
|
//rx_dropped incremented by gt96100_rx
|
|
//tx_dropped incremented by gt96100_tx
|
|
stats->multicast = mib->multicastFramesReceived;
|
|
// collisions incremented by gt96100_tx_complete
|
|
stats->rx_length_errors = mib->oversizeFrames + mib->fragments;
|
|
// The RxError condition means the Rx DMA encountered a
|
|
// CPU owned descriptor, which, if things are working as
|
|
// they should, means the Rx ring has overflowed.
|
|
stats->rx_over_errors = mib->macRxError;
|
|
stats->rx_crc_errors = mib->cRCError;
|
|
}
|
|
|
|
static void
|
|
abort(struct net_device *dev, u32 abort_bits)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
int timedout = 100; // wait up to 100 msec for hard stop to complete
|
|
|
|
dbg(3, "%s\n", __FUNCTION__);
|
|
|
|
// Return if neither Rx or Tx abort bits are set
|
|
if (!(abort_bits & (sdcmrAR | sdcmrAT)))
|
|
return;
|
|
|
|
// make sure only the Rx/Tx abort bits are set
|
|
abort_bits &= (sdcmrAR | sdcmrAT);
|
|
|
|
spin_lock(&gp->lock);
|
|
|
|
// abort any Rx/Tx DMA immediately
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, abort_bits);
|
|
|
|
dbg(3, "%s: SDMA comm = %x\n", __FUNCTION__,
|
|
GT96100ETH_READ(gp, GT96100_ETH_SDMA_COMM));
|
|
|
|
// wait for abort to complete
|
|
while (GT96100ETH_READ(gp, GT96100_ETH_SDMA_COMM) & abort_bits) {
|
|
// snooze for 1 msec and check again
|
|
gt96100_delay(1);
|
|
|
|
if (--timedout == 0) {
|
|
err("%s: timeout!!\n", __FUNCTION__);
|
|
break;
|
|
}
|
|
}
|
|
|
|
spin_unlock(&gp->lock);
|
|
}
|
|
|
|
|
|
static void
|
|
hard_stop(struct net_device *dev)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
|
|
dbg(3, "%s\n", __FUNCTION__);
|
|
|
|
disable_ether_irq(dev);
|
|
|
|
abort(dev, sdcmrAR | sdcmrAT);
|
|
|
|
// disable port
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG, 0);
|
|
}
|
|
|
|
|
|
static void
|
|
enable_ether_irq(struct net_device *dev)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
u32 intMask;
|
|
/*
|
|
* route ethernet interrupt to GT_SERINT0 for port 0,
|
|
* GT_INT0 for port 1.
|
|
*/
|
|
int intr_mask_reg = (gp->port_num == 0) ?
|
|
GT96100_SERINT0_MASK : GT96100_INT0_HIGH_MASK;
|
|
|
|
if (gp->chip_rev >= REV_GT96100A_1) {
|
|
intMask = icrTxBufferLow | icrTxEndLow |
|
|
icrTxErrorLow | icrRxOVR | icrTxUdr |
|
|
icrRxBufferQ0 | icrRxErrorQ0 |
|
|
icrMIIPhySTC | icrEtherIntSum;
|
|
}
|
|
else {
|
|
intMask = icrTxBufferLow | icrTxEndLow |
|
|
icrTxErrorLow | icrRxOVR | icrTxUdr |
|
|
icrRxBuffer | icrRxError |
|
|
icrMIIPhySTC | icrEtherIntSum;
|
|
}
|
|
|
|
// unmask interrupts
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_INT_MASK, intMask);
|
|
|
|
intMask = GT96100_READ(intr_mask_reg);
|
|
intMask |= 1<<gp->port_num;
|
|
GT96100_WRITE(intr_mask_reg, intMask);
|
|
}
|
|
|
|
static void
|
|
disable_ether_irq(struct net_device *dev)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
u32 intMask;
|
|
int intr_mask_reg = (gp->port_num == 0) ?
|
|
GT96100_SERINT0_MASK : GT96100_INT0_HIGH_MASK;
|
|
|
|
intMask = GT96100_READ(intr_mask_reg);
|
|
intMask &= ~(1<<gp->port_num);
|
|
GT96100_WRITE(intr_mask_reg, intMask);
|
|
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_INT_MASK, 0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Init GT96100 ethernet controller driver
|
|
*/
|
|
static int gt96100_init_module(void)
|
|
{
|
|
struct pci_dev *pci;
|
|
int i, retval=0;
|
|
u32 cpuConfig;
|
|
|
|
/*
|
|
* Stupid probe because this really isn't a PCI device
|
|
*/
|
|
if (!(pci = pci_find_device(PCI_VENDOR_ID_MARVELL,
|
|
PCI_DEVICE_ID_MARVELL_GT96100, NULL)) &&
|
|
!(pci = pci_find_device(PCI_VENDOR_ID_MARVELL,
|
|
PCI_DEVICE_ID_MARVELL_GT96100A, NULL))) {
|
|
printk(KERN_ERR __FILE__ ": GT96100 not found!\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
cpuConfig = GT96100_READ(GT96100_CPU_INTERF_CONFIG);
|
|
if (cpuConfig & (1<<12)) {
|
|
printk(KERN_ERR __FILE__
|
|
": must be in Big Endian mode!\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
for (i=0; i < NUM_INTERFACES; i++)
|
|
retval |= gt96100_probe1(pci, i);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int __init gt96100_probe1(struct pci_dev *pci, int port_num)
|
|
{
|
|
struct gt96100_private *gp = NULL;
|
|
struct gt96100_if_t *gtif = >96100_iflist[port_num];
|
|
int phy_addr, phy_id1, phy_id2;
|
|
u32 phyAD;
|
|
int retval;
|
|
unsigned char chip_rev;
|
|
struct net_device *dev = NULL;
|
|
|
|
if (gtif->irq < 0) {
|
|
printk(KERN_ERR "%s: irq unknown - probing not supported\n",
|
|
__FUNCTION__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
pci_read_config_byte(pci, PCI_REVISION_ID, &chip_rev);
|
|
|
|
if (chip_rev >= REV_GT96100A_1) {
|
|
phyAD = GT96100_READ(GT96100_ETH_PHY_ADDR_REG);
|
|
phy_addr = (phyAD >> (5*port_num)) & 0x1f;
|
|
} else {
|
|
/*
|
|
* not sure what's this about -- probably a gt bug
|
|
*/
|
|
phy_addr = port_num;
|
|
phyAD = GT96100_READ(GT96100_ETH_PHY_ADDR_REG);
|
|
phyAD &= ~(0x1f << (port_num*5));
|
|
phyAD |= phy_addr << (port_num*5);
|
|
GT96100_WRITE(GT96100_ETH_PHY_ADDR_REG, phyAD);
|
|
}
|
|
|
|
// probe for the external PHY
|
|
if ((phy_id1 = read_MII(phy_addr, 2)) <= 0 ||
|
|
(phy_id2 = read_MII(phy_addr, 3)) <= 0) {
|
|
printk(KERN_ERR "%s: no PHY found on MII%d\n", __FUNCTION__, port_num);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!request_region(gtif->iobase, GT96100_ETH_IO_SIZE, "GT96100ETH")) {
|
|
printk(KERN_ERR "%s: request_region failed\n", __FUNCTION__);
|
|
return -EBUSY;
|
|
}
|
|
|
|
dev = alloc_etherdev(sizeof(struct gt96100_private));
|
|
if (!dev)
|
|
goto out;
|
|
gtif->dev = dev;
|
|
|
|
/* private struct aligned and zeroed by alloc_etherdev */
|
|
/* Fill in the 'dev' fields. */
|
|
dev->base_addr = gtif->iobase;
|
|
dev->irq = gtif->irq;
|
|
|
|
if ((retval = parse_mac_addr(dev, gtif->mac_str))) {
|
|
err("%s: MAC address parse failed\n", __FUNCTION__);
|
|
retval = -EINVAL;
|
|
goto out1;
|
|
}
|
|
|
|
gp = netdev_priv(dev);
|
|
|
|
memset(gp, 0, sizeof(*gp)); // clear it
|
|
|
|
gp->port_num = port_num;
|
|
gp->io_size = GT96100_ETH_IO_SIZE;
|
|
gp->port_offset = port_num * GT96100_ETH_IO_SIZE;
|
|
gp->phy_addr = phy_addr;
|
|
gp->chip_rev = chip_rev;
|
|
|
|
info("%s found at 0x%x, irq %d\n",
|
|
chip_name(gp->chip_rev), gtif->iobase, gtif->irq);
|
|
dump_hw_addr(0, dev, "HW Address ", dev->dev_addr);
|
|
info("%s chip revision=%d\n", chip_name(gp->chip_rev), gp->chip_rev);
|
|
info("%s ethernet port %d\n", chip_name(gp->chip_rev), gp->port_num);
|
|
info("external PHY ID1=0x%04x, ID2=0x%04x\n", phy_id1, phy_id2);
|
|
|
|
// Allocate Rx and Tx descriptor rings
|
|
if (gp->rx_ring == NULL) {
|
|
// All descriptors in ring must be 16-byte aligned
|
|
gp->rx_ring = dmaalloc(sizeof(gt96100_rd_t) * RX_RING_SIZE
|
|
+ sizeof(gt96100_td_t) * TX_RING_SIZE,
|
|
&gp->rx_ring_dma);
|
|
if (gp->rx_ring == NULL) {
|
|
retval = -ENOMEM;
|
|
goto out1;
|
|
}
|
|
|
|
gp->tx_ring = (gt96100_td_t *)(gp->rx_ring + RX_RING_SIZE);
|
|
gp->tx_ring_dma =
|
|
gp->rx_ring_dma + sizeof(gt96100_rd_t) * RX_RING_SIZE;
|
|
}
|
|
|
|
// Allocate the Rx Data Buffers
|
|
if (gp->rx_buff == NULL) {
|
|
gp->rx_buff = dmaalloc(PKT_BUF_SZ*RX_RING_SIZE,
|
|
&gp->rx_buff_dma);
|
|
if (gp->rx_buff == NULL) {
|
|
retval = -ENOMEM;
|
|
goto out2;
|
|
}
|
|
}
|
|
|
|
dbg(3, "%s: rx_ring=%p, tx_ring=%p\n", __FUNCTION__,
|
|
gp->rx_ring, gp->tx_ring);
|
|
|
|
// Allocate Rx Hash Table
|
|
if (gp->hash_table == NULL) {
|
|
gp->hash_table = (char*)dmaalloc(RX_HASH_TABLE_SIZE,
|
|
&gp->hash_table_dma);
|
|
if (gp->hash_table == NULL) {
|
|
retval = -ENOMEM;
|
|
goto out3;
|
|
}
|
|
}
|
|
|
|
dbg(3, "%s: hash=%p\n", __FUNCTION__, gp->hash_table);
|
|
|
|
spin_lock_init(&gp->lock);
|
|
|
|
dev->open = gt96100_open;
|
|
dev->hard_start_xmit = gt96100_tx;
|
|
dev->stop = gt96100_close;
|
|
dev->get_stats = gt96100_get_stats;
|
|
//dev->do_ioctl = gt96100_ioctl;
|
|
dev->set_multicast_list = gt96100_set_rx_mode;
|
|
dev->tx_timeout = gt96100_tx_timeout;
|
|
dev->watchdog_timeo = GT96100ETH_TX_TIMEOUT;
|
|
|
|
retval = register_netdev(dev);
|
|
if (retval)
|
|
goto out4;
|
|
return 0;
|
|
|
|
out4:
|
|
dmafree(RX_HASH_TABLE_SIZE, gp->hash_table_dma);
|
|
out3:
|
|
dmafree(PKT_BUF_SZ*RX_RING_SIZE, gp->rx_buff);
|
|
out2:
|
|
dmafree(sizeof(gt96100_rd_t) * RX_RING_SIZE
|
|
+ sizeof(gt96100_td_t) * TX_RING_SIZE,
|
|
gp->rx_ring);
|
|
out1:
|
|
free_netdev (dev);
|
|
out:
|
|
release_region(gtif->iobase, GT96100_ETH_IO_SIZE);
|
|
|
|
err("%s failed. Returns %d\n", __FUNCTION__, retval);
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void
|
|
reset_tx(struct net_device *dev)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
int i;
|
|
|
|
abort(dev, sdcmrAT);
|
|
|
|
for (i=0; i<TX_RING_SIZE; i++) {
|
|
if (gp->tx_skbuff[i]) {
|
|
if (in_interrupt())
|
|
dev_kfree_skb_irq(gp->tx_skbuff[i]);
|
|
else
|
|
dev_kfree_skb(gp->tx_skbuff[i]);
|
|
gp->tx_skbuff[i] = NULL;
|
|
}
|
|
|
|
gp->tx_ring[i].cmdstat = 0; // CPU owns
|
|
gp->tx_ring[i].byte_cnt = 0;
|
|
gp->tx_ring[i].buff_ptr = 0;
|
|
gp->tx_ring[i].next =
|
|
cpu_to_dma32(gp->tx_ring_dma +
|
|
sizeof(gt96100_td_t) * (i+1));
|
|
dump_tx_desc(4, dev, i);
|
|
}
|
|
/* Wrap the ring. */
|
|
gp->tx_ring[i-1].next = cpu_to_dma32(gp->tx_ring_dma);
|
|
|
|
// setup only the lowest priority TxCDP reg
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_CURR_TX_DESC_PTR0, gp->tx_ring_dma);
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_CURR_TX_DESC_PTR1, 0);
|
|
|
|
// init Tx indeces and pkt counter
|
|
gp->tx_next_in = gp->tx_next_out = 0;
|
|
gp->tx_count = 0;
|
|
|
|
}
|
|
|
|
static void
|
|
reset_rx(struct net_device *dev)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
int i;
|
|
|
|
abort(dev, sdcmrAR);
|
|
|
|
for (i=0; i<RX_RING_SIZE; i++) {
|
|
gp->rx_ring[i].next =
|
|
cpu_to_dma32(gp->rx_ring_dma +
|
|
sizeof(gt96100_rd_t) * (i+1));
|
|
gp->rx_ring[i].buff_ptr =
|
|
cpu_to_dma32(gp->rx_buff_dma + i*PKT_BUF_SZ);
|
|
gp->rx_ring[i].buff_sz = cpu_to_dma16(PKT_BUF_SZ);
|
|
// Give ownership to device, set first and last, enable intr
|
|
gp->rx_ring[i].cmdstat =
|
|
cpu_to_dma32((u32)(rxFirst | rxLast | rxOwn | rxEI));
|
|
dump_rx_desc(4, dev, i);
|
|
}
|
|
/* Wrap the ring. */
|
|
gp->rx_ring[i-1].next = cpu_to_dma32(gp->rx_ring_dma);
|
|
|
|
// Setup only the lowest priority RxFDP and RxCDP regs
|
|
for (i=0; i<4; i++) {
|
|
if (i == 0) {
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_1ST_RX_DESC_PTR0,
|
|
gp->rx_ring_dma);
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_CURR_RX_DESC_PTR0,
|
|
gp->rx_ring_dma);
|
|
} else {
|
|
GT96100ETH_WRITE(gp,
|
|
GT96100_ETH_1ST_RX_DESC_PTR0 + i*4,
|
|
0);
|
|
GT96100ETH_WRITE(gp,
|
|
GT96100_ETH_CURR_RX_DESC_PTR0 + i*4,
|
|
0);
|
|
}
|
|
}
|
|
|
|
// init Rx NextOut index
|
|
gp->rx_next_out = 0;
|
|
}
|
|
|
|
|
|
// Returns 1 if the Tx counter and indeces don't gel
|
|
static int
|
|
gt96100_check_tx_consistent(struct gt96100_private *gp)
|
|
{
|
|
int diff = gp->tx_next_in - gp->tx_next_out;
|
|
|
|
diff = diff<0 ? TX_RING_SIZE + diff : diff;
|
|
diff = gp->tx_count == TX_RING_SIZE ? diff + TX_RING_SIZE : diff;
|
|
|
|
return (diff != gp->tx_count);
|
|
}
|
|
|
|
static int
|
|
gt96100_init(struct net_device *dev)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
u32 tmp;
|
|
u16 mii_reg;
|
|
|
|
dbg(3, "%s: dev=%p\n", __FUNCTION__, dev);
|
|
dbg(3, "%s: scs10_lo=%4x, scs10_hi=%4x\n", __FUNCTION__,
|
|
GT96100_READ(0x8), GT96100_READ(0x10));
|
|
dbg(3, "%s: scs32_lo=%4x, scs32_hi=%4x\n", __FUNCTION__,
|
|
GT96100_READ(0x18), GT96100_READ(0x20));
|
|
|
|
// Stop and disable Port
|
|
hard_stop(dev);
|
|
|
|
// Setup CIU Arbiter
|
|
tmp = GT96100_READ(GT96100_CIU_ARBITER_CONFIG);
|
|
tmp |= (0x0c << (gp->port_num*2)); // set Ether DMA req priority to hi
|
|
#ifndef DESC_BE
|
|
tmp &= ~(1<<31); // set desc endianess to little
|
|
#else
|
|
tmp |= (1<<31);
|
|
#endif
|
|
GT96100_WRITE(GT96100_CIU_ARBITER_CONFIG, tmp);
|
|
dbg(3, "%s: CIU Config=%x/%x\n", __FUNCTION__,
|
|
tmp, GT96100_READ(GT96100_CIU_ARBITER_CONFIG));
|
|
|
|
// Set routing.
|
|
tmp = GT96100_READ(GT96100_ROUTE_MAIN) & (0x3f << 18);
|
|
tmp |= (0x07 << (18 + gp->port_num*3));
|
|
GT96100_WRITE(GT96100_ROUTE_MAIN, tmp);
|
|
|
|
/* set MII as peripheral func */
|
|
tmp = GT96100_READ(GT96100_GPP_CONFIG2);
|
|
tmp |= 0x7fff << (gp->port_num*16);
|
|
GT96100_WRITE(GT96100_GPP_CONFIG2, tmp);
|
|
|
|
/* Set up MII port pin directions */
|
|
tmp = GT96100_READ(GT96100_GPP_IO2);
|
|
tmp |= 0x003d << (gp->port_num*16);
|
|
GT96100_WRITE(GT96100_GPP_IO2, tmp);
|
|
|
|
// Set-up hash table
|
|
memset(gp->hash_table, 0, RX_HASH_TABLE_SIZE); // clear it
|
|
gp->hash_mode = 0;
|
|
// Add a single entry to hash table - our ethernet address
|
|
gt96100_add_hash_entry(dev, dev->dev_addr);
|
|
// Set-up DMA ptr to hash table
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_HASH_TBL_PTR, gp->hash_table_dma);
|
|
dbg(3, "%s: Hash Tbl Ptr=%x\n", __FUNCTION__,
|
|
GT96100ETH_READ(gp, GT96100_ETH_HASH_TBL_PTR));
|
|
|
|
// Setup Tx
|
|
reset_tx(dev);
|
|
|
|
dbg(3, "%s: Curr Tx Desc Ptr0=%x\n", __FUNCTION__,
|
|
GT96100ETH_READ(gp, GT96100_ETH_CURR_TX_DESC_PTR0));
|
|
|
|
// Setup Rx
|
|
reset_rx(dev);
|
|
|
|
dbg(3, "%s: 1st/Curr Rx Desc Ptr0=%x/%x\n", __FUNCTION__,
|
|
GT96100ETH_READ(gp, GT96100_ETH_1ST_RX_DESC_PTR0),
|
|
GT96100ETH_READ(gp, GT96100_ETH_CURR_RX_DESC_PTR0));
|
|
|
|
// eth port config register
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG_EXT,
|
|
pcxrFCTL | pcxrFCTLen | pcxrFLP | pcxrDPLXen);
|
|
|
|
mii_reg = read_MII(gp->phy_addr, 0x11); /* int enable register */
|
|
mii_reg |= 2; /* enable mii interrupt */
|
|
write_MII(gp->phy_addr, 0x11, mii_reg);
|
|
|
|
dbg(3, "%s: PhyAD=%x\n", __FUNCTION__,
|
|
GT96100_READ(GT96100_ETH_PHY_ADDR_REG));
|
|
|
|
// setup DMA
|
|
|
|
// We want the Rx/Tx DMA to write/read data to/from memory in
|
|
// Big Endian mode. Also set DMA Burst Size to 8 64Bit words.
|
|
#ifdef DESC_DATA_BE
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_CONFIG,
|
|
(0xf<<sdcrRCBit) | sdcrRIFB | (3<<sdcrBSZBit));
|
|
#else
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_CONFIG,
|
|
sdcrBLMR | sdcrBLMT |
|
|
(0xf<<sdcrRCBit) | sdcrRIFB | (3<<sdcrBSZBit));
|
|
#endif
|
|
dbg(3, "%s: SDMA Config=%x\n", __FUNCTION__,
|
|
GT96100ETH_READ(gp, GT96100_ETH_SDMA_CONFIG));
|
|
|
|
// start Rx DMA
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, sdcmrERD);
|
|
dbg(3, "%s: SDMA Comm=%x\n", __FUNCTION__,
|
|
GT96100ETH_READ(gp, GT96100_ETH_SDMA_COMM));
|
|
|
|
// enable this port (set hash size to 1/2K)
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG, pcrEN | pcrHS);
|
|
dbg(3, "%s: Port Config=%x\n", __FUNCTION__,
|
|
GT96100ETH_READ(gp, GT96100_ETH_PORT_CONFIG));
|
|
|
|
/*
|
|
* Disable all Type-of-Service queueing. All Rx packets will be
|
|
* treated normally and will be sent to the lowest priority
|
|
* queue.
|
|
*
|
|
* Disable flow-control for now. FIXME: support flow control?
|
|
*/
|
|
|
|
// clear all the MIB ctr regs
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG_EXT,
|
|
pcxrFCTL | pcxrFCTLen | pcxrFLP |
|
|
pcxrPRIOrxOverride);
|
|
read_mib_counters(gp);
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG_EXT,
|
|
pcxrFCTL | pcxrFCTLen | pcxrFLP |
|
|
pcxrPRIOrxOverride | pcxrMIBclrMode);
|
|
|
|
dbg(3, "%s: Port Config Ext=%x\n", __FUNCTION__,
|
|
GT96100ETH_READ(gp, GT96100_ETH_PORT_CONFIG_EXT));
|
|
|
|
netif_start_queue(dev);
|
|
|
|
dump_MII(4, dev);
|
|
|
|
// enable interrupts
|
|
enable_ether_irq(dev);
|
|
|
|
// we should now be receiving frames
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
gt96100_open(struct net_device *dev)
|
|
{
|
|
int retval;
|
|
|
|
dbg(2, "%s: dev=%p\n", __FUNCTION__, dev);
|
|
|
|
// Initialize and startup the GT-96100 ethernet port
|
|
if ((retval = gt96100_init(dev))) {
|
|
err("error in gt96100_init\n");
|
|
free_irq(dev->irq, dev);
|
|
return retval;
|
|
}
|
|
|
|
if ((retval = request_irq(dev->irq, >96100_interrupt,
|
|
SA_SHIRQ, dev->name, dev))) {
|
|
err("unable to get IRQ %d\n", dev->irq);
|
|
return retval;
|
|
}
|
|
|
|
dbg(2, "%s: Initialization done.\n", __FUNCTION__);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
gt96100_close(struct net_device *dev)
|
|
{
|
|
dbg(3, "%s: dev=%p\n", __FUNCTION__, dev);
|
|
|
|
// stop the device
|
|
if (netif_device_present(dev)) {
|
|
netif_stop_queue(dev);
|
|
hard_stop(dev);
|
|
}
|
|
|
|
free_irq(dev->irq, dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
gt96100_tx(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
unsigned long flags;
|
|
int nextIn;
|
|
|
|
spin_lock_irqsave(&gp->lock, flags);
|
|
|
|
nextIn = gp->tx_next_in;
|
|
|
|
dbg(3, "%s: nextIn=%d\n", __FUNCTION__, nextIn);
|
|
|
|
if (gp->tx_count >= TX_RING_SIZE) {
|
|
warn("Tx Ring full, pkt dropped.\n");
|
|
gp->stats.tx_dropped++;
|
|
spin_unlock_irqrestore(&gp->lock, flags);
|
|
return 1;
|
|
}
|
|
|
|
if (!(gp->last_psr & psrLink)) {
|
|
err("%s: Link down, pkt dropped.\n", __FUNCTION__);
|
|
gp->stats.tx_dropped++;
|
|
spin_unlock_irqrestore(&gp->lock, flags);
|
|
return 1;
|
|
}
|
|
|
|
if (dma32_to_cpu(gp->tx_ring[nextIn].cmdstat) & txOwn) {
|
|
err("%s: device owns descriptor, pkt dropped.\n", __FUNCTION__);
|
|
gp->stats.tx_dropped++;
|
|
// stop the queue, so Tx timeout can fix it
|
|
netif_stop_queue(dev);
|
|
spin_unlock_irqrestore(&gp->lock, flags);
|
|
return 1;
|
|
}
|
|
|
|
// Prepare the Descriptor at tx_next_in
|
|
gp->tx_skbuff[nextIn] = skb;
|
|
gp->tx_ring[nextIn].byte_cnt = cpu_to_dma16(skb->len);
|
|
gp->tx_ring[nextIn].buff_ptr = cpu_to_dma32(virt_to_phys(skb->data));
|
|
// make sure packet gets written back to memory
|
|
dma_cache_wback_inv((unsigned long)(skb->data), skb->len);
|
|
// Give ownership to device, set first and last desc, enable interrupt
|
|
// Setting of ownership bit must be *last*!
|
|
gp->tx_ring[nextIn].cmdstat =
|
|
cpu_to_dma32((u32)(txOwn | txGenCRC | txEI |
|
|
txPad | txFirst | txLast));
|
|
|
|
dump_tx_desc(4, dev, nextIn);
|
|
dump_skb(4, dev, skb);
|
|
|
|
// increment tx_next_in with wrap
|
|
gp->tx_next_in = (nextIn + 1) % TX_RING_SIZE;
|
|
// If DMA is stopped, restart
|
|
if (!(GT96100ETH_READ(gp, GT96100_ETH_PORT_STATUS) & psrTxLow))
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM,
|
|
sdcmrERD | sdcmrTXDL);
|
|
|
|
// increment count and stop queue if full
|
|
if (++gp->tx_count == TX_RING_SIZE) {
|
|
gp->tx_full = 1;
|
|
netif_stop_queue(dev);
|
|
dbg(2, "Tx Ring now full, queue stopped.\n");
|
|
}
|
|
|
|
dev->trans_start = jiffies;
|
|
spin_unlock_irqrestore(&gp->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int
|
|
gt96100_rx(struct net_device *dev, u32 status)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
struct sk_buff *skb;
|
|
int pkt_len, nextOut, cdp;
|
|
gt96100_rd_t *rd;
|
|
u32 cmdstat;
|
|
|
|
dbg(3, "%s: dev=%p, status=%x\n", __FUNCTION__, dev, status);
|
|
|
|
cdp = (GT96100ETH_READ(gp, GT96100_ETH_1ST_RX_DESC_PTR0)
|
|
- gp->rx_ring_dma) / sizeof(gt96100_rd_t);
|
|
|
|
// Continue until we reach 1st descriptor pointer
|
|
for (nextOut = gp->rx_next_out; nextOut != cdp;
|
|
nextOut = (nextOut + 1) % RX_RING_SIZE) {
|
|
|
|
if (--gp->intr_work_done == 0)
|
|
break;
|
|
|
|
rd = &gp->rx_ring[nextOut];
|
|
cmdstat = dma32_to_cpu(rd->cmdstat);
|
|
|
|
dbg(4, "%s: Rx desc cmdstat=%x, nextOut=%d\n", __FUNCTION__,
|
|
cmdstat, nextOut);
|
|
|
|
if (cmdstat & (u32)rxOwn) {
|
|
//err("%s: device owns descriptor!\n", __FUNCTION__);
|
|
// DMA is not finished updating descriptor???
|
|
// Leave and come back later to pick-up where
|
|
// we left off.
|
|
break;
|
|
}
|
|
|
|
// Drop this received pkt if there were any errors
|
|
if (((cmdstat & (u32)(rxErrorSummary)) &&
|
|
(cmdstat & (u32)(rxFirst))) || (status & icrRxError)) {
|
|
// update the detailed rx error counters that
|
|
// are not covered by the MIB counters.
|
|
if (cmdstat & (u32)rxOverrun)
|
|
gp->stats.rx_fifo_errors++;
|
|
cmdstat |= (u32)rxOwn;
|
|
rd->cmdstat = cpu_to_dma32(cmdstat);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Must be first and last (ie only) descriptor of packet. We
|
|
* ignore (drop) any packets that do not fit in one descriptor.
|
|
* Every descriptor's receive buffer is large enough to hold
|
|
* the maximum 802.3 frame size, so a multi-descriptor packet
|
|
* indicates an error. Most if not all corrupted packets will
|
|
* have already been dropped by the above check for the
|
|
* rxErrorSummary status bit.
|
|
*/
|
|
if (!(cmdstat & (u32)rxFirst) || !(cmdstat & (u32)rxLast)) {
|
|
if (cmdstat & (u32)rxFirst) {
|
|
/*
|
|
* This is the first descriptor of a
|
|
* multi-descriptor packet. It isn't corrupted
|
|
* because the above check for rxErrorSummary
|
|
* would have dropped it already, so what's
|
|
* the deal with this packet? Good question,
|
|
* let's dump it out.
|
|
*/
|
|
err("%s: desc not first and last!\n", __FUNCTION__);
|
|
dump_rx_desc(0, dev, nextOut);
|
|
}
|
|
cmdstat |= (u32)rxOwn;
|
|
rd->cmdstat = cpu_to_dma32(cmdstat);
|
|
// continue to drop every descriptor of this packet
|
|
continue;
|
|
}
|
|
|
|
pkt_len = dma16_to_cpu(rd->byte_cnt);
|
|
|
|
/* Create new skb. */
|
|
skb = dev_alloc_skb(pkt_len+2);
|
|
if (skb == NULL) {
|
|
err("%s: Memory squeeze, dropping packet.\n", __FUNCTION__);
|
|
gp->stats.rx_dropped++;
|
|
cmdstat |= (u32)rxOwn;
|
|
rd->cmdstat = cpu_to_dma32(cmdstat);
|
|
continue;
|
|
}
|
|
skb->dev = dev;
|
|
skb_reserve(skb, 2); /* 16 byte IP header align */
|
|
memcpy(skb_put(skb, pkt_len),
|
|
&gp->rx_buff[nextOut*PKT_BUF_SZ], pkt_len);
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
dump_skb(4, dev, skb);
|
|
|
|
netif_rx(skb); /* pass the packet to upper layers */
|
|
dev->last_rx = jiffies;
|
|
|
|
// now we can release ownership of this desc back to device
|
|
cmdstat |= (u32)rxOwn;
|
|
rd->cmdstat = cpu_to_dma32(cmdstat);
|
|
}
|
|
|
|
if (nextOut == gp->rx_next_out)
|
|
dbg(3, "%s: RxCDP did not increment?\n", __FUNCTION__);
|
|
|
|
gp->rx_next_out = nextOut;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void
|
|
gt96100_tx_complete(struct net_device *dev, u32 status)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
int nextOut, cdp;
|
|
gt96100_td_t *td;
|
|
u32 cmdstat;
|
|
|
|
cdp = (GT96100ETH_READ(gp, GT96100_ETH_CURR_TX_DESC_PTR0)
|
|
- gp->tx_ring_dma) / sizeof(gt96100_td_t);
|
|
|
|
// Continue until we reach the current descriptor pointer
|
|
for (nextOut = gp->tx_next_out; nextOut != cdp;
|
|
nextOut = (nextOut + 1) % TX_RING_SIZE) {
|
|
|
|
if (--gp->intr_work_done == 0)
|
|
break;
|
|
|
|
td = &gp->tx_ring[nextOut];
|
|
cmdstat = dma32_to_cpu(td->cmdstat);
|
|
|
|
dbg(3, "%s: Tx desc cmdstat=%x, nextOut=%d\n", __FUNCTION__,
|
|
cmdstat, nextOut);
|
|
|
|
if (cmdstat & (u32)txOwn) {
|
|
/*
|
|
* DMA is not finished writing descriptor???
|
|
* Leave and come back later to pick-up where
|
|
* we left off.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
// increment Tx error stats
|
|
if (cmdstat & (u32)txErrorSummary) {
|
|
dbg(2, "%s: Tx error, cmdstat = %x\n", __FUNCTION__,
|
|
cmdstat);
|
|
gp->stats.tx_errors++;
|
|
if (cmdstat & (u32)txReTxLimit)
|
|
gp->stats.tx_aborted_errors++;
|
|
if (cmdstat & (u32)txUnderrun)
|
|
gp->stats.tx_fifo_errors++;
|
|
if (cmdstat & (u32)txLateCollision)
|
|
gp->stats.tx_window_errors++;
|
|
}
|
|
|
|
if (cmdstat & (u32)txCollision)
|
|
gp->stats.collisions +=
|
|
(u32)((cmdstat & txReTxCntMask) >>
|
|
txReTxCntBit);
|
|
|
|
// Wake the queue if the ring was full
|
|
if (gp->tx_full) {
|
|
gp->tx_full = 0;
|
|
if (gp->last_psr & psrLink) {
|
|
netif_wake_queue(dev);
|
|
dbg(2, "%s: Tx Ring was full, queue waked\n",
|
|
__FUNCTION__);
|
|
}
|
|
}
|
|
|
|
// decrement tx ring buffer count
|
|
if (gp->tx_count) gp->tx_count--;
|
|
|
|
// free the skb
|
|
if (gp->tx_skbuff[nextOut]) {
|
|
dbg(3, "%s: good Tx, skb=%p\n", __FUNCTION__,
|
|
gp->tx_skbuff[nextOut]);
|
|
dev_kfree_skb_irq(gp->tx_skbuff[nextOut]);
|
|
gp->tx_skbuff[nextOut] = NULL;
|
|
} else {
|
|
err("%s: no skb!\n", __FUNCTION__);
|
|
}
|
|
}
|
|
|
|
gp->tx_next_out = nextOut;
|
|
|
|
if (gt96100_check_tx_consistent(gp)) {
|
|
err("%s: Tx queue inconsistent!\n", __FUNCTION__);
|
|
}
|
|
|
|
if ((status & icrTxEndLow) && gp->tx_count != 0) {
|
|
// we must restart the DMA
|
|
dbg(3, "%s: Restarting Tx DMA\n", __FUNCTION__);
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM,
|
|
sdcmrERD | sdcmrTXDL);
|
|
}
|
|
}
|
|
|
|
|
|
static irqreturn_t
|
|
gt96100_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
struct net_device *dev = (struct net_device *)dev_id;
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
u32 status;
|
|
int handled = 0;
|
|
|
|
if (dev == NULL) {
|
|
err("%s: null dev ptr\n", __FUNCTION__);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
dbg(3, "%s: entry, icr=%x\n", __FUNCTION__,
|
|
GT96100ETH_READ(gp, GT96100_ETH_INT_CAUSE));
|
|
|
|
spin_lock(&gp->lock);
|
|
|
|
gp->intr_work_done = max_interrupt_work;
|
|
|
|
while (gp->intr_work_done > 0) {
|
|
|
|
status = GT96100ETH_READ(gp, GT96100_ETH_INT_CAUSE);
|
|
// ACK interrupts
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_INT_CAUSE, ~status);
|
|
|
|
if ((status & icrEtherIntSum) == 0 &&
|
|
!(status & (icrTxBufferLow|icrTxBufferHigh|icrRxBuffer)))
|
|
break;
|
|
|
|
handled = 1;
|
|
|
|
if (status & icrMIIPhySTC) {
|
|
u32 psr = GT96100ETH_READ(gp, GT96100_ETH_PORT_STATUS);
|
|
if (gp->last_psr != psr) {
|
|
dbg(0, "port status:\n");
|
|
dbg(0, " %s MBit/s, %s-duplex, "
|
|
"flow-control %s, link is %s,\n",
|
|
psr & psrSpeed ? "100":"10",
|
|
psr & psrDuplex ? "full":"half",
|
|
psr & psrFctl ? "disabled":"enabled",
|
|
psr & psrLink ? "up":"down");
|
|
dbg(0, " TxLowQ is %s, TxHighQ is %s, "
|
|
"Transmitter is %s\n",
|
|
psr & psrTxLow ? "running":"stopped",
|
|
psr & psrTxHigh ? "running":"stopped",
|
|
psr & psrTxInProg ? "on":"off");
|
|
|
|
if ((psr & psrLink) && !gp->tx_full &&
|
|
netif_queue_stopped(dev)) {
|
|
dbg(0, "%s: Link up, waking queue.\n",
|
|
__FUNCTION__);
|
|
netif_wake_queue(dev);
|
|
} else if (!(psr & psrLink) &&
|
|
!netif_queue_stopped(dev)) {
|
|
dbg(0, "%s: Link down, stopping queue.\n",
|
|
__FUNCTION__);
|
|
netif_stop_queue(dev);
|
|
}
|
|
|
|
gp->last_psr = psr;
|
|
}
|
|
|
|
if (--gp->intr_work_done == 0)
|
|
break;
|
|
}
|
|
|
|
if (status & (icrTxBufferLow | icrTxEndLow))
|
|
gt96100_tx_complete(dev, status);
|
|
|
|
if (status & (icrRxBuffer | icrRxError)) {
|
|
gt96100_rx(dev, status);
|
|
}
|
|
|
|
// Now check TX errors (RX errors were handled in gt96100_rx)
|
|
if (status & icrTxErrorLow) {
|
|
err("%s: Tx resource error\n", __FUNCTION__);
|
|
if (--gp->intr_work_done == 0)
|
|
break;
|
|
}
|
|
|
|
if (status & icrTxUdr) {
|
|
err("%s: Tx underrun error\n", __FUNCTION__);
|
|
if (--gp->intr_work_done == 0)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (gp->intr_work_done == 0) {
|
|
// ACK any remaining pending interrupts
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_INT_CAUSE, 0);
|
|
dbg(3, "%s: hit max work\n", __FUNCTION__);
|
|
}
|
|
|
|
dbg(3, "%s: exit, icr=%x\n", __FUNCTION__,
|
|
GT96100ETH_READ(gp, GT96100_ETH_INT_CAUSE));
|
|
|
|
spin_unlock(&gp->lock);
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
|
|
static void
|
|
gt96100_tx_timeout(struct net_device *dev)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&gp->lock, flags);
|
|
|
|
if (!(gp->last_psr & psrLink)) {
|
|
err("tx_timeout: link down.\n");
|
|
spin_unlock_irqrestore(&gp->lock, flags);
|
|
} else {
|
|
if (gt96100_check_tx_consistent(gp))
|
|
err("tx_timeout: Tx ring error.\n");
|
|
|
|
disable_ether_irq(dev);
|
|
spin_unlock_irqrestore(&gp->lock, flags);
|
|
reset_tx(dev);
|
|
enable_ether_irq(dev);
|
|
|
|
netif_wake_queue(dev);
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
gt96100_set_rx_mode(struct net_device *dev)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
unsigned long flags;
|
|
//struct dev_mc_list *mcptr;
|
|
|
|
dbg(3, "%s: dev=%p, flags=%x\n", __FUNCTION__, dev, dev->flags);
|
|
|
|
// stop the Receiver DMA
|
|
abort(dev, sdcmrAR);
|
|
|
|
spin_lock_irqsave(&gp->lock, flags);
|
|
|
|
if (dev->flags & IFF_PROMISC) {
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_PORT_CONFIG,
|
|
pcrEN | pcrHS | pcrPM);
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
FIXME: currently multicast doesn't work - need to get hash table
|
|
working first.
|
|
*/
|
|
if (dev->mc_count) {
|
|
// clear hash table
|
|
memset(gp->hash_table, 0, RX_HASH_TABLE_SIZE);
|
|
// Add our ethernet address
|
|
gt96100_add_hash_entry(dev, dev->dev_addr);
|
|
|
|
for (mcptr = dev->mc_list; mcptr; mcptr = mcptr->next) {
|
|
dump_hw_addr(2, dev, __FUNCTION__ ": addr=",
|
|
mcptr->dmi_addr);
|
|
gt96100_add_hash_entry(dev, mcptr->dmi_addr);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// restart Rx DMA
|
|
GT96100ETH_WRITE(gp, GT96100_ETH_SDMA_COMM, sdcmrERD);
|
|
|
|
spin_unlock_irqrestore(&gp->lock, flags);
|
|
}
|
|
|
|
static struct net_device_stats *
|
|
gt96100_get_stats(struct net_device *dev)
|
|
{
|
|
struct gt96100_private *gp = netdev_priv(dev);
|
|
unsigned long flags;
|
|
|
|
dbg(3, "%s: dev=%p\n", __FUNCTION__, dev);
|
|
|
|
if (netif_device_present(dev)) {
|
|
spin_lock_irqsave (&gp->lock, flags);
|
|
update_stats(gp);
|
|
spin_unlock_irqrestore (&gp->lock, flags);
|
|
}
|
|
|
|
return &gp->stats;
|
|
}
|
|
|
|
static void gt96100_cleanup_module(void)
|
|
{
|
|
int i;
|
|
for (i=0; i<NUM_INTERFACES; i++) {
|
|
struct gt96100_if_t *gtif = >96100_iflist[i];
|
|
if (gtif->dev != NULL) {
|
|
struct gt96100_private *gp = (struct gt96100_private *)
|
|
netdev_priv(gtif->dev);
|
|
unregister_netdev(gtif->dev);
|
|
dmafree(RX_HASH_TABLE_SIZE, gp->hash_table_dma);
|
|
dmafree(PKT_BUF_SZ*RX_RING_SIZE, gp->rx_buff);
|
|
dmafree(sizeof(gt96100_rd_t) * RX_RING_SIZE
|
|
+ sizeof(gt96100_td_t) * TX_RING_SIZE,
|
|
gp->rx_ring);
|
|
free_netdev(gtif->dev);
|
|
release_region(gtif->iobase, gp->io_size);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int __init gt96100_setup(char *options)
|
|
{
|
|
char *this_opt;
|
|
|
|
if (!options || !*options)
|
|
return 0;
|
|
|
|
while ((this_opt = strsep (&options, ",")) != NULL) {
|
|
if (!*this_opt)
|
|
continue;
|
|
if (!strncmp(this_opt, "mac0:", 5)) {
|
|
memcpy(mac0, this_opt+5, 17);
|
|
mac0[17]= '\0';
|
|
} else if (!strncmp(this_opt, "mac1:", 5)) {
|
|
memcpy(mac1, this_opt+5, 17);
|
|
mac1[17]= '\0';
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("gt96100eth=", gt96100_setup);
|
|
|
|
module_init(gt96100_init_module);
|
|
module_exit(gt96100_cleanup_module);
|
|
|
|
MODULE_AUTHOR("Steve Longerbeam <stevel@mvista.com>");
|
|
MODULE_DESCRIPTION("GT96100 Ethernet driver");
|