--- /dev/null
+#define VERSION "0.23"
+/* ns83820.c by Benjamin LaHaise with contributions.
+ *
+ * Questions/comments/discussion to linux-ns83820@kvack.org.
+ *
+ * $Revision: 1.34.2.23 $
+ *
+ * Copyright 2001 Benjamin LaHaise.
+ * Copyright 2001, 2002 Red Hat.
+ *
+ * Mmmm, chocolate vanilla mocha...
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * ChangeLog
+ * =========
+ * 20010414 0.1 - created
+ * 20010622 0.2 - basic rx and tx.
+ * 20010711 0.3 - added duplex and link state detection support.
+ * 20010713 0.4 - zero copy, no hangs.
+ * 0.5 - 64 bit dma support (davem will hate me for this)
+ * - disable jumbo frames to avoid tx hangs
+ * - work around tx deadlocks on my 1.02 card via
+ * fiddling with TXCFG
+ * 20010810 0.6 - use pci dma api for ringbuffers, work on ia64
+ * 20010816 0.7 - misc cleanups
+ * 20010826 0.8 - fix critical zero copy bugs
+ * 0.9 - internal experiment
+ * 20010827 0.10 - fix ia64 unaligned access.
+ * 20010906 0.11 - accept all packets with checksum errors as
+ * otherwise fragments get lost
+ * - fix >> 32 bugs
+ * 0.12 - add statistics counters
+ * - add allmulti/promisc support
+ * 20011009 0.13 - hotplug support, other smaller pci api cleanups
+ * 20011204 0.13a - optical transceiver support added
+ * by Michael Clark <michael@metaparadigm.com>
+ * 20011205 0.13b - call register_netdev earlier in initialization
+ * suppress duplicate link status messages
+ * 20011117 0.14 - ethtool GDRVINFO, GLINK support from jgarzik
+ * 20011204 0.15 get ppc (big endian) working
+ * 20011218 0.16 various cleanups
+ * 20020310 0.17 speedups
+ * 20020610 0.18 - actually use the pci dma api for highmem
+ * - remove pci latency register fiddling
+ * 0.19 - better bist support
+ * - add ihr and reset_phy parameters
+ * - gmii bus probing
+ * - fix missed txok introduced during performance
+ * tuning
+ * 0.20 - fix stupid RFEN thinko. i am such a smurf.
+ * 20040828 0.21 - add hardware vlan accleration
+ * by Neil Horman <nhorman@redhat.com>
+ * 20050406 0.22 - improved DAC ifdefs from Andi Kleen
+ * - removal of dead code from Adrian Bunk
+ * - fix half duplex collision behaviour
+ * Driver Overview
+ * ===============
+ *
+ * This driver was originally written for the National Semiconductor
+ * 83820 chip, a 10/100/1000 Mbps 64 bit PCI ethernet NIC. Hopefully
+ * this code will turn out to be a) clean, b) correct, and c) fast.
+ * With that in mind, I'm aiming to split the code up as much as
+ * reasonably possible. At present there are X major sections that
+ * break down into a) packet receive, b) packet transmit, c) link
+ * management, d) initialization and configuration. Where possible,
+ * these code paths are designed to run in parallel.
+ *
+ * This driver has been tested and found to work with the following
+ * cards (in no particular order):
+ *
+ * Cameo SOHO-GA2000T SOHO-GA2500T
+ * D-Link DGE-500T
+ * PureData PDP8023Z-TG
+ * SMC SMC9452TX SMC9462TX
+ * Netgear GA621
+ *
+ * Special thanks to SMC for providing hardware to test this driver on.
+ *
+ * Reports of success or failure would be greatly appreciated.
+ */
+//#define dprintk printk
+#define dprintk(x...) do { } while (0)
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/delay.h>
+#include <linux/workqueue.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ip.h> /* for iph */
+#include <linux/in.h> /* for IPPROTO_... */
+#include <linux/compiler.h>
+#include <linux/prefetch.h>
+#include <linux/ethtool.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/if_vlan.h>
+#include <linux/rtnetlink.h>
+#include <linux/jiffies.h>
+#include <linux/slab.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#define DRV_NAME "ns83820"
+
+/* Global parameters. See module_param near the bottom. */
+static int ihr = 2;
+static int reset_phy = 0;
+static int lnksts = 0; /* CFG_LNKSTS bit polarity */
+
+/* Dprintk is used for more interesting debug events */
+#undef Dprintk
+#define Dprintk dprintk
+
+/* tunables */
+#define RX_BUF_SIZE 1500 /* 8192 */
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+#define NS83820_VLAN_ACCEL_SUPPORT
+#endif
+
+/* Must not exceed ~65000. */
+#define NR_RX_DESC 64
+#define NR_TX_DESC 128
+
+/* not tunable */
+#define REAL_RX_BUF_SIZE (RX_BUF_SIZE + 14) /* rx/tx mac addr + type */
+
+#define MIN_TX_DESC_FREE 8
+
+/* register defines */
+#define CFGCS 0x04
+
+#define CR_TXE 0x00000001
+#define CR_TXD 0x00000002
+/* Ramit : Here's a tip, don't do a RXD immediately followed by an RXE
+ * The Receive engine skips one descriptor and moves
+ * onto the next one!! */
+#define CR_RXE 0x00000004
+#define CR_RXD 0x00000008
+#define CR_TXR 0x00000010
+#define CR_RXR 0x00000020
+#define CR_SWI 0x00000080
+#define CR_RST 0x00000100
+
+#define PTSCR_EEBIST_FAIL 0x00000001
+#define PTSCR_EEBIST_EN 0x00000002
+#define PTSCR_EELOAD_EN 0x00000004
+#define PTSCR_RBIST_FAIL 0x000001b8
+#define PTSCR_RBIST_DONE 0x00000200
+#define PTSCR_RBIST_EN 0x00000400
+#define PTSCR_RBIST_RST 0x00002000
+
+#define MEAR_EEDI 0x00000001
+#define MEAR_EEDO 0x00000002
+#define MEAR_EECLK 0x00000004
+#define MEAR_EESEL 0x00000008
+#define MEAR_MDIO 0x00000010
+#define MEAR_MDDIR 0x00000020
+#define MEAR_MDC 0x00000040
+
+#define ISR_TXDESC3 0x40000000
+#define ISR_TXDESC2 0x20000000
+#define ISR_TXDESC1 0x10000000
+#define ISR_TXDESC0 0x08000000
+#define ISR_RXDESC3 0x04000000
+#define ISR_RXDESC2 0x02000000
+#define ISR_RXDESC1 0x01000000
+#define ISR_RXDESC0 0x00800000
+#define ISR_TXRCMP 0x00400000
+#define ISR_RXRCMP 0x00200000
+#define ISR_DPERR 0x00100000
+#define ISR_SSERR 0x00080000
+#define ISR_RMABT 0x00040000
+#define ISR_RTABT 0x00020000
+#define ISR_RXSOVR 0x00010000
+#define ISR_HIBINT 0x00008000
+#define ISR_PHY 0x00004000
+#define ISR_PME 0x00002000
+#define ISR_SWI 0x00001000
+#define ISR_MIB 0x00000800
+#define ISR_TXURN 0x00000400
+#define ISR_TXIDLE 0x00000200
+#define ISR_TXERR 0x00000100
+#define ISR_TXDESC 0x00000080
+#define ISR_TXOK 0x00000040
+#define ISR_RXORN 0x00000020
+#define ISR_RXIDLE 0x00000010
+#define ISR_RXEARLY 0x00000008
+#define ISR_RXERR 0x00000004
+#define ISR_RXDESC 0x00000002
+#define ISR_RXOK 0x00000001
+
+#define TXCFG_CSI 0x80000000
+#define TXCFG_HBI 0x40000000
+#define TXCFG_MLB 0x20000000
+#define TXCFG_ATP 0x10000000
+#define TXCFG_ECRETRY 0x00800000
+#define TXCFG_BRST_DIS 0x00080000
+#define TXCFG_MXDMA1024 0x00000000
+#define TXCFG_MXDMA512 0x00700000
+#define TXCFG_MXDMA256 0x00600000
+#define TXCFG_MXDMA128 0x00500000
+#define TXCFG_MXDMA64 0x00400000
+#define TXCFG_MXDMA32 0x00300000
+#define TXCFG_MXDMA16 0x00200000
+#define TXCFG_MXDMA8 0x00100000
+
+#define CFG_LNKSTS 0x80000000
+#define CFG_SPDSTS 0x60000000
+#define CFG_SPDSTS1 0x40000000
+#define CFG_SPDSTS0 0x20000000
+#define CFG_DUPSTS 0x10000000
+#define CFG_TBI_EN 0x01000000
+#define CFG_MODE_1000 0x00400000
+/* Ramit : Dont' ever use AUTO_1000, it never works and is buggy.
+ * Read the Phy response and then configure the MAC accordingly */
+#define CFG_AUTO_1000 0x00200000
+#define CFG_PINT_CTL 0x001c0000
+#define CFG_PINT_DUPSTS 0x00100000
+#define CFG_PINT_LNKSTS 0x00080000
+#define CFG_PINT_SPDSTS 0x00040000
+#define CFG_TMRTEST 0x00020000
+#define CFG_MRM_DIS 0x00010000
+#define CFG_MWI_DIS 0x00008000
+#define CFG_T64ADDR 0x00004000
+#define CFG_PCI64_DET 0x00002000
+#define CFG_DATA64_EN 0x00001000
+#define CFG_M64ADDR 0x00000800
+#define CFG_PHY_RST 0x00000400
+#define CFG_PHY_DIS 0x00000200
+#define CFG_EXTSTS_EN 0x00000100
+#define CFG_REQALG 0x00000080
+#define CFG_SB 0x00000040
+#define CFG_POW 0x00000020
+#define CFG_EXD 0x00000010
+#define CFG_PESEL 0x00000008
+#define CFG_BROM_DIS 0x00000004
+#define CFG_EXT_125 0x00000002
+#define CFG_BEM 0x00000001
+
+#define EXTSTS_UDPPKT 0x00200000
+#define EXTSTS_TCPPKT 0x00080000
+#define EXTSTS_IPPKT 0x00020000
+#define EXTSTS_VPKT 0x00010000
+#define EXTSTS_VTG_MASK 0x0000ffff
+
+#define SPDSTS_POLARITY (CFG_SPDSTS1 | CFG_SPDSTS0 | CFG_DUPSTS | (lnksts ? CFG_LNKSTS : 0))
+
+#define MIBC_MIBS 0x00000008
+#define MIBC_ACLR 0x00000004
+#define MIBC_FRZ 0x00000002
+#define MIBC_WRN 0x00000001
+
+#define PCR_PSEN (1 << 31)
+#define PCR_PS_MCAST (1 << 30)
+#define PCR_PS_DA (1 << 29)
+#define PCR_STHI_8 (3 << 23)
+#define PCR_STLO_4 (1 << 23)
+#define PCR_FFHI_8K (3 << 21)
+#define PCR_FFLO_4K (1 << 21)
+#define PCR_PAUSE_CNT 0xFFFE
+
+#define RXCFG_AEP 0x80000000
+#define RXCFG_ARP 0x40000000
+#define RXCFG_STRIPCRC 0x20000000
+#define RXCFG_RX_FD 0x10000000
+#define RXCFG_ALP 0x08000000
+#define RXCFG_AIRL 0x04000000
+#define RXCFG_MXDMA512 0x00700000
+#define RXCFG_DRTH 0x0000003e
+#define RXCFG_DRTH0 0x00000002
+
+#define RFCR_RFEN 0x80000000
+#define RFCR_AAB 0x40000000
+#define RFCR_AAM 0x20000000
+#define RFCR_AAU 0x10000000
+#define RFCR_APM 0x08000000
+#define RFCR_APAT 0x07800000
+#define RFCR_APAT3 0x04000000
+#define RFCR_APAT2 0x02000000
+#define RFCR_APAT1 0x01000000
+#define RFCR_APAT0 0x00800000
+#define RFCR_AARP 0x00400000
+#define RFCR_MHEN 0x00200000
+#define RFCR_UHEN 0x00100000
+#define RFCR_ULM 0x00080000
+
+#define VRCR_RUDPE 0x00000080
+#define VRCR_RTCPE 0x00000040
+#define VRCR_RIPE 0x00000020
+#define VRCR_IPEN 0x00000010
+#define VRCR_DUTF 0x00000008
+#define VRCR_DVTF 0x00000004
+#define VRCR_VTREN 0x00000002
+#define VRCR_VTDEN 0x00000001
+
+#define VTCR_PPCHK 0x00000008
+#define VTCR_GCHK 0x00000004
+#define VTCR_VPPTI 0x00000002
+#define VTCR_VGTI 0x00000001
+
+#define CR 0x00
+#define CFG 0x04
+#define MEAR 0x08
+#define PTSCR 0x0c
+#define ISR 0x10
+#define IMR 0x14
+#define IER 0x18
+#define IHR 0x1c
+#define TXDP 0x20
+#define TXDP_HI 0x24
+#define TXCFG 0x28
+#define GPIOR 0x2c
+#define RXDP 0x30
+#define RXDP_HI 0x34
+#define RXCFG 0x38
+#define PQCR 0x3c
+#define WCSR 0x40
+#define PCR 0x44
+#define RFCR 0x48
+#define RFDR 0x4c
+
+#define SRR 0x58
+
+#define VRCR 0xbc
+#define VTCR 0xc0
+#define VDR 0xc4
+#define CCSR 0xcc
+
+#define TBICR 0xe0
+#define TBISR 0xe4
+#define TANAR 0xe8
+#define TANLPAR 0xec
+#define TANER 0xf0
+#define TESR 0xf4
+
+#define TBICR_MR_AN_ENABLE 0x00001000
+#define TBICR_MR_RESTART_AN 0x00000200
+
+#define TBISR_MR_LINK_STATUS 0x00000020
+#define TBISR_MR_AN_COMPLETE 0x00000004
+
+#define TANAR_PS2 0x00000100
+#define TANAR_PS1 0x00000080
+#define TANAR_HALF_DUP 0x00000040
+#define TANAR_FULL_DUP 0x00000020
+
+#define GPIOR_GP5_OE 0x00000200
+#define GPIOR_GP4_OE 0x00000100
+#define GPIOR_GP3_OE 0x00000080
+#define GPIOR_GP2_OE 0x00000040
+#define GPIOR_GP1_OE 0x00000020
+#define GPIOR_GP3_OUT 0x00000004
+#define GPIOR_GP1_OUT 0x00000001
+
+#define LINK_AUTONEGOTIATE 0x01
+#define LINK_DOWN 0x02
+#define LINK_UP 0x04
+
+#define HW_ADDR_LEN sizeof(dma_addr_t)
+#define desc_addr_set(desc, addr) \
+ do { \
+ ((desc)[0] = cpu_to_le32(addr)); \
+ if (HW_ADDR_LEN == 8) \
+ (desc)[1] = cpu_to_le32(((u64)addr) >> 32); \
+ } while(0)
+#define desc_addr_get(desc) \
+ (le32_to_cpu((desc)[0]) | \
+ (HW_ADDR_LEN == 8 ? ((dma_addr_t)le32_to_cpu((desc)[1]))<<32 : 0))
+
+#define DESC_LINK 0
+#define DESC_BUFPTR (DESC_LINK + HW_ADDR_LEN/4)
+#define DESC_CMDSTS (DESC_BUFPTR + HW_ADDR_LEN/4)
+#define DESC_EXTSTS (DESC_CMDSTS + 4/4)
+
+#define CMDSTS_OWN 0x80000000
+#define CMDSTS_MORE 0x40000000
+#define CMDSTS_INTR 0x20000000
+#define CMDSTS_ERR 0x10000000
+#define CMDSTS_OK 0x08000000
+#define CMDSTS_RUNT 0x00200000
+#define CMDSTS_LEN_MASK 0x0000ffff
+
+#define CMDSTS_DEST_MASK 0x01800000
+#define CMDSTS_DEST_SELF 0x00800000
+#define CMDSTS_DEST_MULTI 0x01000000
+
+#define DESC_SIZE 8 /* Should be cache line sized */
+
+struct rx_info {
+ spinlock_t lock;
+ int up;
+ unsigned long idle;
+
+ struct sk_buff *skbs[NR_RX_DESC];
+
+ __le32 *next_rx_desc;
+ u16 next_rx, next_empty;
+
+ __le32 *descs;
+ dma_addr_t phy_descs;
+};
+
+
+struct ns83820 {
+ u8 __iomem *base;
+
+ struct pci_dev *pci_dev;
+ struct net_device *ndev;
+
+ struct rx_info rx_info;
+ struct tasklet_struct rx_tasklet;
+
+ unsigned ihr;
+ struct work_struct tq_refill;
+
+ /* protects everything below. irqsave when using. */
+ spinlock_t misc_lock;
+
+ u32 CFG_cache;
+
+ u32 MEAR_cache;
+ u32 IMR_cache;
+
+ unsigned linkstate;
+
+ spinlock_t tx_lock;
+
+ u16 tx_done_idx;
+ u16 tx_idx;
+ volatile u16 tx_free_idx; /* idx of free desc chain */
+ u16 tx_intr_idx;
+
+ atomic_t nr_tx_skbs;
+ struct sk_buff *tx_skbs[NR_TX_DESC];
+
+ char pad[16] __attribute__((aligned(16)));
+ __le32 *tx_descs;
+ dma_addr_t tx_phy_descs;
+
+ struct timer_list tx_watchdog;
+};
+
+static inline struct ns83820 *PRIV(struct net_device *dev)
+{
+ return netdev_priv(dev);
+}
+
+#define __kick_rx(dev) writel(CR_RXE, dev->base + CR)
+
+static inline void kick_rx(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ dprintk("kick_rx: maybe kicking\n");
+ if (test_and_clear_bit(0, &dev->rx_info.idle)) {
+ dprintk("actually kicking\n");
+ writel(dev->rx_info.phy_descs +
+ (4 * DESC_SIZE * dev->rx_info.next_rx),
+ dev->base + RXDP);
+ if (dev->rx_info.next_rx == dev->rx_info.next_empty)
+ printk(KERN_DEBUG "%s: uh-oh: next_rx == next_empty???\n",
+ ndev->name);
+ __kick_rx(dev);
+ }
+}
+
+//free = (tx_done_idx + NR_TX_DESC-2 - free_idx) % NR_TX_DESC
+#define start_tx_okay(dev) \
+ (((NR_TX_DESC-2 + dev->tx_done_idx - dev->tx_free_idx) % NR_TX_DESC) > MIN_TX_DESC_FREE)
+
+/* Packet Receiver
+ *
+ * The hardware supports linked lists of receive descriptors for
+ * which ownership is transferred back and forth by means of an
+ * ownership bit. While the hardware does support the use of a
+ * ring for receive descriptors, we only make use of a chain in
+ * an attempt to reduce bus traffic under heavy load scenarios.
+ * This will also make bugs a bit more obvious. The current code
+ * only makes use of a single rx chain; I hope to implement
+ * priority based rx for version 1.0. Goal: even under overload
+ * conditions, still route realtime traffic with as low jitter as
+ * possible.
+ */
+static inline void build_rx_desc(struct ns83820 *dev, __le32 *desc, dma_addr_t link, dma_addr_t buf, u32 cmdsts, u32 extsts)
+{
+ desc_addr_set(desc + DESC_LINK, link);
+ desc_addr_set(desc + DESC_BUFPTR, buf);
+ desc[DESC_EXTSTS] = cpu_to_le32(extsts);
+ mb();
+ desc[DESC_CMDSTS] = cpu_to_le32(cmdsts);
+}
+
+#define nr_rx_empty(dev) ((NR_RX_DESC-2 + dev->rx_info.next_rx - dev->rx_info.next_empty) % NR_RX_DESC)
+static inline int ns83820_add_rx_skb(struct ns83820 *dev, struct sk_buff *skb)
+{
+ unsigned next_empty;
+ u32 cmdsts;
+ __le32 *sg;
+ dma_addr_t buf;
+
+ next_empty = dev->rx_info.next_empty;
+
+ /* don't overrun last rx marker */
+ if (unlikely(nr_rx_empty(dev) <= 2)) {
+ kfree_skb(skb);
+ return 1;
+ }
+
+#if 0
+ dprintk("next_empty[%d] nr_used[%d] next_rx[%d]\n",
+ dev->rx_info.next_empty,
+ dev->rx_info.nr_used,
+ dev->rx_info.next_rx
+ );
+#endif
+
+ sg = dev->rx_info.descs + (next_empty * DESC_SIZE);
+ BUG_ON(NULL != dev->rx_info.skbs[next_empty]);
+ dev->rx_info.skbs[next_empty] = skb;
+
+ dev->rx_info.next_empty = (next_empty + 1) % NR_RX_DESC;
+ cmdsts = REAL_RX_BUF_SIZE | CMDSTS_INTR;
+ buf = pci_map_single(dev->pci_dev, skb->data,
+ REAL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
+ build_rx_desc(dev, sg, 0, buf, cmdsts, 0);
+ /* update link of previous rx */
+ if (likely(next_empty != dev->rx_info.next_rx))
+ dev->rx_info.descs[((NR_RX_DESC + next_empty - 1) % NR_RX_DESC) * DESC_SIZE] = cpu_to_le32(dev->rx_info.phy_descs + (next_empty * DESC_SIZE * 4));
+
+ return 0;
+}
+
+static inline int rx_refill(struct net_device *ndev, gfp_t gfp)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ unsigned i;
+ unsigned long flags = 0;
+
+ if (unlikely(nr_rx_empty(dev) <= 2))
+ return 0;
+
+ dprintk("rx_refill(%p)\n", ndev);
+ if (gfp == GFP_ATOMIC)
+ spin_lock_irqsave(&dev->rx_info.lock, flags);
+ for (i=0; i<NR_RX_DESC; i++) {
+ struct sk_buff *skb;
+ long res;
+
+ /* extra 16 bytes for alignment */
+ skb = __netdev_alloc_skb(ndev, REAL_RX_BUF_SIZE+16, gfp);
+ if (unlikely(!skb))
+ break;
+
+ skb_reserve(skb, skb->data - PTR_ALIGN(skb->data, 16));
+ if (gfp != GFP_ATOMIC)
+ spin_lock_irqsave(&dev->rx_info.lock, flags);
+ res = ns83820_add_rx_skb(dev, skb);
+ if (gfp != GFP_ATOMIC)
+ spin_unlock_irqrestore(&dev->rx_info.lock, flags);
+ if (res) {
+ i = 1;
+ break;
+ }
+ }
+ if (gfp == GFP_ATOMIC)
+ spin_unlock_irqrestore(&dev->rx_info.lock, flags);
+
+ return i ? 0 : -ENOMEM;
+}
+
+static void rx_refill_atomic(struct net_device *ndev)
+{
+ rx_refill(ndev, GFP_ATOMIC);
+}
+
+/* REFILL */
+static inline void queue_refill(struct work_struct *work)
+{
+ struct ns83820 *dev = container_of(work, struct ns83820, tq_refill);
+ struct net_device *ndev = dev->ndev;
+
+ rx_refill(ndev, GFP_KERNEL);
+ if (dev->rx_info.up)
+ kick_rx(ndev);
+}
+
+static inline void clear_rx_desc(struct ns83820 *dev, unsigned i)
+{
+ build_rx_desc(dev, dev->rx_info.descs + (DESC_SIZE * i), 0, 0, CMDSTS_OWN, 0);
+}
+
+static void phy_intr(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ static const char *speeds[] = { "10", "100", "1000", "1000(?)", "1000F" };
+ u32 cfg, new_cfg;
+ u32 tbisr, tanar, tanlpar;
+ int speed, fullduplex, newlinkstate;
+
+ cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY;
+
+ if (dev->CFG_cache & CFG_TBI_EN) {
+ /* we have an optical transceiver */
+ tbisr = readl(dev->base + TBISR);
+ tanar = readl(dev->base + TANAR);
+ tanlpar = readl(dev->base + TANLPAR);
+ dprintk("phy_intr: tbisr=%08x, tanar=%08x, tanlpar=%08x\n",
+ tbisr, tanar, tanlpar);
+
+ if ( (fullduplex = (tanlpar & TANAR_FULL_DUP) &&
+ (tanar & TANAR_FULL_DUP)) ) {
+
+ /* both of us are full duplex */
+ writel(readl(dev->base + TXCFG)
+ | TXCFG_CSI | TXCFG_HBI | TXCFG_ATP,
+ dev->base + TXCFG);
+ writel(readl(dev->base + RXCFG) | RXCFG_RX_FD,
+ dev->base + RXCFG);
+ /* Light up full duplex LED */
+ writel(readl(dev->base + GPIOR) | GPIOR_GP1_OUT,
+ dev->base + GPIOR);
+
+ } else if (((tanlpar & TANAR_HALF_DUP) &&
+ (tanar & TANAR_HALF_DUP)) ||
+ ((tanlpar & TANAR_FULL_DUP) &&
+ (tanar & TANAR_HALF_DUP)) ||
+ ((tanlpar & TANAR_HALF_DUP) &&
+ (tanar & TANAR_FULL_DUP))) {
+
+ /* one or both of us are half duplex */
+ writel((readl(dev->base + TXCFG)
+ & ~(TXCFG_CSI | TXCFG_HBI)) | TXCFG_ATP,
+ dev->base + TXCFG);
+ writel(readl(dev->base + RXCFG) & ~RXCFG_RX_FD,
+ dev->base + RXCFG);
+ /* Turn off full duplex LED */
+ writel(readl(dev->base + GPIOR) & ~GPIOR_GP1_OUT,
+ dev->base + GPIOR);
+ }
+
+ speed = 4; /* 1000F */
+
+ } else {
+ /* we have a copper transceiver */
+ new_cfg = dev->CFG_cache & ~(CFG_SB | CFG_MODE_1000 | CFG_SPDSTS);
+
+ if (cfg & CFG_SPDSTS1)
+ new_cfg |= CFG_MODE_1000;
+ else
+ new_cfg &= ~CFG_MODE_1000;
+
+ speed = ((cfg / CFG_SPDSTS0) & 3);
+ fullduplex = (cfg & CFG_DUPSTS);
+
+ if (fullduplex) {
+ new_cfg |= CFG_SB;
+ writel(readl(dev->base + TXCFG)
+ | TXCFG_CSI | TXCFG_HBI,
+ dev->base + TXCFG);
+ writel(readl(dev->base + RXCFG) | RXCFG_RX_FD,
+ dev->base + RXCFG);
+ } else {
+ writel(readl(dev->base + TXCFG)
+ & ~(TXCFG_CSI | TXCFG_HBI),
+ dev->base + TXCFG);
+ writel(readl(dev->base + RXCFG) & ~(RXCFG_RX_FD),
+ dev->base + RXCFG);
+ }
+
+ if ((cfg & CFG_LNKSTS) &&
+ ((new_cfg ^ dev->CFG_cache) != 0)) {
+ writel(new_cfg, dev->base + CFG);
+ dev->CFG_cache = new_cfg;
+ }
+
+ dev->CFG_cache &= ~CFG_SPDSTS;
+ dev->CFG_cache |= cfg & CFG_SPDSTS;
+ }
+
+ newlinkstate = (cfg & CFG_LNKSTS) ? LINK_UP : LINK_DOWN;
+
+ if (newlinkstate & LINK_UP &&
+ dev->linkstate != newlinkstate) {
+ netif_start_queue(ndev);
+ netif_wake_queue(ndev);
+ printk(KERN_INFO "%s: link now %s mbps, %s duplex and up.\n",
+ ndev->name,
+ speeds[speed],
+ fullduplex ? "full" : "half");
+ } else if (newlinkstate & LINK_DOWN &&
+ dev->linkstate != newlinkstate) {
+ netif_stop_queue(ndev);
+ printk(KERN_INFO "%s: link now down.\n", ndev->name);
+ }
+
+ dev->linkstate = newlinkstate;
+}
+
+static int ns83820_setup_rx(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ unsigned i;
+ int ret;
+
+ dprintk("ns83820_setup_rx(%p)\n", ndev);
+
+ dev->rx_info.idle = 1;
+ dev->rx_info.next_rx = 0;
+ dev->rx_info.next_rx_desc = dev->rx_info.descs;
+ dev->rx_info.next_empty = 0;
+
+ for (i=0; i<NR_RX_DESC; i++)
+ clear_rx_desc(dev, i);
+
+ writel(0, dev->base + RXDP_HI);
+ writel(dev->rx_info.phy_descs, dev->base + RXDP);
+
+ ret = rx_refill(ndev, GFP_KERNEL);
+ if (!ret) {
+ dprintk("starting receiver\n");
+ /* prevent the interrupt handler from stomping on us */
+ spin_lock_irq(&dev->rx_info.lock);
+
+ writel(0x0001, dev->base + CCSR);
+ writel(0, dev->base + RFCR);
+ writel(0x7fc00000, dev->base + RFCR);
+ writel(0xffc00000, dev->base + RFCR);
+
+ dev->rx_info.up = 1;
+
+ phy_intr(ndev);
+
+ /* Okay, let it rip */
+ spin_lock(&dev->misc_lock);
+ dev->IMR_cache |= ISR_PHY;
+ dev->IMR_cache |= ISR_RXRCMP;
+ //dev->IMR_cache |= ISR_RXERR;
+ //dev->IMR_cache |= ISR_RXOK;
+ dev->IMR_cache |= ISR_RXORN;
+ dev->IMR_cache |= ISR_RXSOVR;
+ dev->IMR_cache |= ISR_RXDESC;
+ dev->IMR_cache |= ISR_RXIDLE;
+ dev->IMR_cache |= ISR_TXDESC;
+ dev->IMR_cache |= ISR_TXIDLE;
+
+ writel(dev->IMR_cache, dev->base + IMR);
+ writel(1, dev->base + IER);
+ spin_unlock(&dev->misc_lock);
+
+ kick_rx(ndev);
+
+ spin_unlock_irq(&dev->rx_info.lock);
+ }
+ return ret;
+}
+
+static void ns83820_cleanup_rx(struct ns83820 *dev)
+{
+ unsigned i;
+ unsigned long flags;
+
+ dprintk("ns83820_cleanup_rx(%p)\n", dev);
+
+ /* disable receive interrupts */
+ spin_lock_irqsave(&dev->misc_lock, flags);
+ dev->IMR_cache &= ~(ISR_RXOK | ISR_RXDESC | ISR_RXERR | ISR_RXEARLY | ISR_RXIDLE);
+ writel(dev->IMR_cache, dev->base + IMR);
+ spin_unlock_irqrestore(&dev->misc_lock, flags);
+
+ /* synchronize with the interrupt handler and kill it */
+ dev->rx_info.up = 0;
+ synchronize_irq(dev->pci_dev->irq);
+
+ /* touch the pci bus... */
+ readl(dev->base + IMR);
+
+ /* assumes the transmitter is already disabled and reset */
+ writel(0, dev->base + RXDP_HI);
+ writel(0, dev->base + RXDP);
+
+ for (i=0; i<NR_RX_DESC; i++) {
+ struct sk_buff *skb = dev->rx_info.skbs[i];
+ dev->rx_info.skbs[i] = NULL;
+ clear_rx_desc(dev, i);
+ kfree_skb(skb);
+ }
+}
+
+static void ns83820_rx_kick(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ /*if (nr_rx_empty(dev) >= NR_RX_DESC/4)*/ {
+ if (dev->rx_info.up) {
+ rx_refill_atomic(ndev);
+ kick_rx(ndev);
+ }
+ }
+
+ if (dev->rx_info.up && nr_rx_empty(dev) > NR_RX_DESC*3/4)
+ schedule_work(&dev->tq_refill);
+ else
+ kick_rx(ndev);
+ if (dev->rx_info.idle)
+ printk(KERN_DEBUG "%s: BAD\n", ndev->name);
+}
+
+/* rx_irq
+ *
+ */
+static void rx_irq(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ struct rx_info *info = &dev->rx_info;
+ unsigned next_rx;
+ int rx_rc, len;
+ u32 cmdsts;
+ __le32 *desc;
+ unsigned long flags;
+ int nr = 0;
+
+ dprintk("rx_irq(%p)\n", ndev);
+ dprintk("rxdp: %08x, descs: %08lx next_rx[%d]: %p next_empty[%d]: %p\n",
+ readl(dev->base + RXDP),
+ (long)(dev->rx_info.phy_descs),
+ (int)dev->rx_info.next_rx,
+ (dev->rx_info.descs + (DESC_SIZE * dev->rx_info.next_rx)),
+ (int)dev->rx_info.next_empty,
+ (dev->rx_info.descs + (DESC_SIZE * dev->rx_info.next_empty))
+ );
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (!info->up)
+ goto out;
+
+ dprintk("walking descs\n");
+ next_rx = info->next_rx;
+ desc = info->next_rx_desc;
+ while ((CMDSTS_OWN & (cmdsts = le32_to_cpu(desc[DESC_CMDSTS]))) &&
+ (cmdsts != CMDSTS_OWN)) {
+ struct sk_buff *skb;
+ u32 extsts = le32_to_cpu(desc[DESC_EXTSTS]);
+ dma_addr_t bufptr = desc_addr_get(desc + DESC_BUFPTR);
+
+ dprintk("cmdsts: %08x\n", cmdsts);
+ dprintk("link: %08x\n", cpu_to_le32(desc[DESC_LINK]));
+ dprintk("extsts: %08x\n", extsts);
+
+ skb = info->skbs[next_rx];
+ info->skbs[next_rx] = NULL;
+ info->next_rx = (next_rx + 1) % NR_RX_DESC;
+
+ mb();
+ clear_rx_desc(dev, next_rx);
+
+ pci_unmap_single(dev->pci_dev, bufptr,
+ RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
+ len = cmdsts & CMDSTS_LEN_MASK;
+#ifdef NS83820_VLAN_ACCEL_SUPPORT
+ /* NH: As was mentioned below, this chip is kinda
+ * brain dead about vlan tag stripping. Frames
+ * that are 64 bytes with a vlan header appended
+ * like arp frames, or pings, are flagged as Runts
+ * when the tag is stripped and hardware. This
+ * also means that the OK bit in the descriptor
+ * is cleared when the frame comes in so we have
+ * to do a specific length check here to make sure
+ * the frame would have been ok, had we not stripped
+ * the tag.
+ */
+ if (likely((CMDSTS_OK & cmdsts) ||
+ ((cmdsts & CMDSTS_RUNT) && len >= 56))) {
+#else
+ if (likely(CMDSTS_OK & cmdsts)) {
+#endif
+ skb_put(skb, len);
+ if (unlikely(!skb))
+ goto netdev_mangle_me_harder_failed;
+ if (cmdsts & CMDSTS_DEST_MULTI)
+ ndev->stats.multicast++;
+ ndev->stats.rx_packets++;
+ ndev->stats.rx_bytes += len;
+ if ((extsts & 0x002a0000) && !(extsts & 0x00540000)) {
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ } else {
+ skb_checksum_none_assert(skb);
+ }
+ skb->protocol = eth_type_trans(skb, ndev);
+#ifdef NS83820_VLAN_ACCEL_SUPPORT
+ if(extsts & EXTSTS_VPKT) {
+ unsigned short tag;
+
+ tag = ntohs(extsts & EXTSTS_VTG_MASK);
+ __vlan_hwaccel_put_tag(skb, htons(ETH_P_IPV6), tag);
+ }
+#endif
+ rx_rc = netif_rx(skb);
+ if (NET_RX_DROP == rx_rc) {
+netdev_mangle_me_harder_failed:
+ ndev->stats.rx_dropped++;
+ }
+ } else {
+ kfree_skb(skb);
+ }
+
+ nr++;
+ next_rx = info->next_rx;
+ desc = info->descs + (DESC_SIZE * next_rx);
+ }
+ info->next_rx = next_rx;
+ info->next_rx_desc = info->descs + (DESC_SIZE * next_rx);
+
+out:
+ if (0 && !nr) {
+ Dprintk("dazed: cmdsts_f: %08x\n", cmdsts);
+ }
+
+ spin_unlock_irqrestore(&info->lock, flags);
+}
+
+static void rx_action(unsigned long _dev)
+{
+ struct net_device *ndev = (void *)_dev;
+ struct ns83820 *dev = PRIV(ndev);
+ rx_irq(ndev);
+ writel(ihr, dev->base + IHR);
+
+ spin_lock_irq(&dev->misc_lock);
+ dev->IMR_cache |= ISR_RXDESC;
+ writel(dev->IMR_cache, dev->base + IMR);
+ spin_unlock_irq(&dev->misc_lock);
+
+ rx_irq(ndev);
+ ns83820_rx_kick(ndev);
+}
+
+/* Packet Transmit code
+ */
+static inline void kick_tx(struct ns83820 *dev)
+{
+ dprintk("kick_tx(%p): tx_idx=%d free_idx=%d\n",
+ dev, dev->tx_idx, dev->tx_free_idx);
+ writel(CR_TXE, dev->base + CR);
+}
+
+/* No spinlock needed on the transmit irq path as the interrupt handler is
+ * serialized.
+ */
+static void do_tx_done(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ u32 cmdsts, tx_done_idx;
+ __le32 *desc;
+
+ dprintk("do_tx_done(%p)\n", ndev);
+ tx_done_idx = dev->tx_done_idx;
+ desc = dev->tx_descs + (tx_done_idx * DESC_SIZE);
+
+ dprintk("tx_done_idx=%d free_idx=%d cmdsts=%08x\n",
+ tx_done_idx, dev->tx_free_idx, le32_to_cpu(desc[DESC_CMDSTS]));
+ while ((tx_done_idx != dev->tx_free_idx) &&
+ !(CMDSTS_OWN & (cmdsts = le32_to_cpu(desc[DESC_CMDSTS]))) ) {
+ struct sk_buff *skb;
+ unsigned len;
+ dma_addr_t addr;
+
+ if (cmdsts & CMDSTS_ERR)
+ ndev->stats.tx_errors++;
+ if (cmdsts & CMDSTS_OK)
+ ndev->stats.tx_packets++;
+ if (cmdsts & CMDSTS_OK)
+ ndev->stats.tx_bytes += cmdsts & 0xffff;
+
+ dprintk("tx_done_idx=%d free_idx=%d cmdsts=%08x\n",
+ tx_done_idx, dev->tx_free_idx, cmdsts);
+ skb = dev->tx_skbs[tx_done_idx];
+ dev->tx_skbs[tx_done_idx] = NULL;
+ dprintk("done(%p)\n", skb);
+
+ len = cmdsts & CMDSTS_LEN_MASK;
+ addr = desc_addr_get(desc + DESC_BUFPTR);
+ if (skb) {
+ pci_unmap_single(dev->pci_dev,
+ addr,
+ len,
+ PCI_DMA_TODEVICE);
+ dev_kfree_skb_irq(skb);
+ atomic_dec(&dev->nr_tx_skbs);
+ } else
+ pci_unmap_page(dev->pci_dev,
+ addr,
+ len,
+ PCI_DMA_TODEVICE);
+
+ tx_done_idx = (tx_done_idx + 1) % NR_TX_DESC;
+ dev->tx_done_idx = tx_done_idx;
+ desc[DESC_CMDSTS] = cpu_to_le32(0);
+ mb();
+ desc = dev->tx_descs + (tx_done_idx * DESC_SIZE);
+ }
+
+ /* Allow network stack to resume queueing packets after we've
+ * finished transmitting at least 1/4 of the packets in the queue.
+ */
+ if (netif_queue_stopped(ndev) && start_tx_okay(dev)) {
+ dprintk("start_queue(%p)\n", ndev);
+ netif_start_queue(ndev);
+ netif_wake_queue(ndev);
+ }
+}
+
+static void ns83820_cleanup_tx(struct ns83820 *dev)
+{
+ unsigned i;
+
+ for (i=0; i<NR_TX_DESC; i++) {
+ struct sk_buff *skb = dev->tx_skbs[i];
+ dev->tx_skbs[i] = NULL;
+ if (skb) {
+ __le32 *desc = dev->tx_descs + (i * DESC_SIZE);
+ pci_unmap_single(dev->pci_dev,
+ desc_addr_get(desc + DESC_BUFPTR),
+ le32_to_cpu(desc[DESC_CMDSTS]) & CMDSTS_LEN_MASK,
+ PCI_DMA_TODEVICE);
+ dev_kfree_skb_irq(skb);
+ atomic_dec(&dev->nr_tx_skbs);
+ }
+ }
+
+ memset(dev->tx_descs, 0, NR_TX_DESC * DESC_SIZE * 4);
+}
+
+/* transmit routine. This code relies on the network layer serializing
+ * its calls in, but will run happily in parallel with the interrupt
+ * handler. This code currently has provisions for fragmenting tx buffers
+ * while trying to track down a bug in either the zero copy code or
+ * the tx fifo (hence the MAX_FRAG_LEN).
+ */
+static netdev_tx_t ns83820_hard_start_xmit(struct sk_buff *skb,
+ struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ u32 free_idx, cmdsts, extsts;
+ int nr_free, nr_frags;
+ unsigned tx_done_idx, last_idx;
+ dma_addr_t buf;
+ unsigned len;
+ skb_frag_t *frag;
+ int stopped = 0;
+ int do_intr = 0;
+ volatile __le32 *first_desc;
+
+ dprintk("ns83820_hard_start_xmit\n");
+
+ nr_frags = skb_shinfo(skb)->nr_frags;
+again:
+ if (unlikely(dev->CFG_cache & CFG_LNKSTS)) {
+ netif_stop_queue(ndev);
+ if (unlikely(dev->CFG_cache & CFG_LNKSTS))
+ return NETDEV_TX_BUSY;
+ netif_start_queue(ndev);
+ }
+
+ last_idx = free_idx = dev->tx_free_idx;
+ tx_done_idx = dev->tx_done_idx;
+ nr_free = (tx_done_idx + NR_TX_DESC-2 - free_idx) % NR_TX_DESC;
+ nr_free -= 1;
+ if (nr_free <= nr_frags) {
+ dprintk("stop_queue - not enough(%p)\n", ndev);
+ netif_stop_queue(ndev);
+
+ /* Check again: we may have raced with a tx done irq */
+ if (dev->tx_done_idx != tx_done_idx) {
+ dprintk("restart queue(%p)\n", ndev);
+ netif_start_queue(ndev);
+ goto again;
+ }
+ return NETDEV_TX_BUSY;
+ }
+
+ if (free_idx == dev->tx_intr_idx) {
+ do_intr = 1;
+ dev->tx_intr_idx = (dev->tx_intr_idx + NR_TX_DESC/4) % NR_TX_DESC;
+ }
+
+ nr_free -= nr_frags;
+ if (nr_free < MIN_TX_DESC_FREE) {
+ dprintk("stop_queue - last entry(%p)\n", ndev);
+ netif_stop_queue(ndev);
+ stopped = 1;
+ }
+
+ frag = skb_shinfo(skb)->frags;
+ if (!nr_frags)
+ frag = NULL;
+ extsts = 0;
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ extsts |= EXTSTS_IPPKT;
+ if (IPPROTO_TCP == ip_hdr(skb)->protocol)
+ extsts |= EXTSTS_TCPPKT;
+ else if (IPPROTO_UDP == ip_hdr(skb)->protocol)
+ extsts |= EXTSTS_UDPPKT;
+ }
+
+#ifdef NS83820_VLAN_ACCEL_SUPPORT
+ if (skb_vlan_tag_present(skb)) {
+ /* fetch the vlan tag info out of the
+ * ancillary data if the vlan code
+ * is using hw vlan acceleration
+ */
+ short tag = skb_vlan_tag_get(skb);
+ extsts |= (EXTSTS_VPKT | htons(tag));
+ }
+#endif
+
+ len = skb->len;
+ if (nr_frags)
+ len -= skb->data_len;
+ buf = pci_map_single(dev->pci_dev, skb->data, len, PCI_DMA_TODEVICE);
+
+ first_desc = dev->tx_descs + (free_idx * DESC_SIZE);
+
+ for (;;) {
+ volatile __le32 *desc = dev->tx_descs + (free_idx * DESC_SIZE);
+
+ dprintk("frag[%3u]: %4u @ 0x%08Lx\n", free_idx, len,
+ (unsigned long long)buf);
+ last_idx = free_idx;
+ free_idx = (free_idx + 1) % NR_TX_DESC;
+ desc[DESC_LINK] = cpu_to_le32(dev->tx_phy_descs + (free_idx * DESC_SIZE * 4));
+ desc_addr_set(desc + DESC_BUFPTR, buf);
+ desc[DESC_EXTSTS] = cpu_to_le32(extsts);
+
+ cmdsts = ((nr_frags) ? CMDSTS_MORE : do_intr ? CMDSTS_INTR : 0);
+ cmdsts |= (desc == first_desc) ? 0 : CMDSTS_OWN;
+ cmdsts |= len;
+ desc[DESC_CMDSTS] = cpu_to_le32(cmdsts);
+
+ if (!nr_frags)
+ break;
+
+ buf = skb_frag_dma_map(&dev->pci_dev->dev, frag, 0,
+ skb_frag_size(frag), DMA_TO_DEVICE);
+ dprintk("frag: buf=%08Lx page=%08lx offset=%08lx\n",
+ (long long)buf, (long) page_to_pfn(frag->page),
+ frag->page_offset);
+ len = skb_frag_size(frag);
+ frag++;
+ nr_frags--;
+ }
+ dprintk("done pkt\n");
+
+ spin_lock_irq(&dev->tx_lock);
+ dev->tx_skbs[last_idx] = skb;
+ first_desc[DESC_CMDSTS] |= cpu_to_le32(CMDSTS_OWN);
+ dev->tx_free_idx = free_idx;
+ atomic_inc(&dev->nr_tx_skbs);
+ spin_unlock_irq(&dev->tx_lock);
+
+ kick_tx(dev);
+
+ /* Check again: we may have raced with a tx done irq */
+ if (stopped && (dev->tx_done_idx != tx_done_idx) && start_tx_okay(dev))
+ netif_start_queue(ndev);
+
+ return NETDEV_TX_OK;
+}
+
+static void ns83820_update_stats(struct ns83820 *dev)
+{
+ struct net_device *ndev = dev->ndev;
+ u8 __iomem *base = dev->base;
+
+ /* the DP83820 will freeze counters, so we need to read all of them */
+ ndev->stats.rx_errors += readl(base + 0x60) & 0xffff;
+ ndev->stats.rx_crc_errors += readl(base + 0x64) & 0xffff;
+ ndev->stats.rx_missed_errors += readl(base + 0x68) & 0xffff;
+ ndev->stats.rx_frame_errors += readl(base + 0x6c) & 0xffff;
+ /*ndev->stats.rx_symbol_errors +=*/ readl(base + 0x70);
+ ndev->stats.rx_length_errors += readl(base + 0x74) & 0xffff;
+ ndev->stats.rx_length_errors += readl(base + 0x78) & 0xffff;
+ /*ndev->stats.rx_badopcode_errors += */ readl(base + 0x7c);
+ /*ndev->stats.rx_pause_count += */ readl(base + 0x80);
+ /*ndev->stats.tx_pause_count += */ readl(base + 0x84);
+ ndev->stats.tx_carrier_errors += readl(base + 0x88) & 0xff;
+}
+
+static struct net_device_stats *ns83820_get_stats(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+
+ /* somewhat overkill */
+ spin_lock_irq(&dev->misc_lock);
+ ns83820_update_stats(dev);
+ spin_unlock_irq(&dev->misc_lock);
+
+ return &ndev->stats;
+}
+
+/* Let ethtool retrieve info */
+static int ns83820_get_settings(struct net_device *ndev,
+ struct ethtool_cmd *cmd)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ u32 cfg, tanar, tbicr;
+ int fullduplex = 0;
+
+ /*
+ * Here's the list of available ethtool commands from other drivers:
+ * cmd->advertising =
+ * ethtool_cmd_speed_set(cmd, ...)
+ * cmd->duplex =
+ * cmd->port = 0;
+ * cmd->phy_address =
+ * cmd->transceiver = 0;
+ * cmd->autoneg =
+ * cmd->maxtxpkt = 0;
+ * cmd->maxrxpkt = 0;
+ */
+
+ /* read current configuration */
+ cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY;
+ tanar = readl(dev->base + TANAR);
+ tbicr = readl(dev->base + TBICR);
+
+ fullduplex = (cfg & CFG_DUPSTS) ? 1 : 0;
+
+ cmd->supported = SUPPORTED_Autoneg;
+
+ if (dev->CFG_cache & CFG_TBI_EN) {
+ /* we have optical interface */
+ cmd->supported |= SUPPORTED_1000baseT_Half |
+ SUPPORTED_1000baseT_Full |
+ SUPPORTED_FIBRE;
+ cmd->port = PORT_FIBRE;
+ } else {
+ /* we have copper */
+ cmd->supported |= SUPPORTED_10baseT_Half |
+ SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Half |
+ SUPPORTED_100baseT_Full | SUPPORTED_1000baseT_Half |
+ SUPPORTED_1000baseT_Full |
+ SUPPORTED_MII;
+ cmd->port = PORT_MII;
+ }
+
+ cmd->duplex = fullduplex ? DUPLEX_FULL : DUPLEX_HALF;
+ switch (cfg / CFG_SPDSTS0 & 3) {
+ case 2:
+ ethtool_cmd_speed_set(cmd, SPEED_1000);
+ break;
+ case 1:
+ ethtool_cmd_speed_set(cmd, SPEED_100);
+ break;
+ default:
+ ethtool_cmd_speed_set(cmd, SPEED_10);
+ break;
+ }
+ cmd->autoneg = (tbicr & TBICR_MR_AN_ENABLE)
+ ? AUTONEG_ENABLE : AUTONEG_DISABLE;
+ return 0;
+}
+
+/* Let ethool change settings*/
+static int ns83820_set_settings(struct net_device *ndev,
+ struct ethtool_cmd *cmd)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ u32 cfg, tanar;
+ int have_optical = 0;
+ int fullduplex = 0;
+
+ /* read current configuration */
+ cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY;
+ tanar = readl(dev->base + TANAR);
+
+ if (dev->CFG_cache & CFG_TBI_EN) {
+ /* we have optical */
+ have_optical = 1;
+ fullduplex = (tanar & TANAR_FULL_DUP);
+
+ } else {
+ /* we have copper */
+ fullduplex = cfg & CFG_DUPSTS;
+ }
+
+ spin_lock_irq(&dev->misc_lock);
+ spin_lock(&dev->tx_lock);
+
+ /* Set duplex */
+ if (cmd->duplex != fullduplex) {
+ if (have_optical) {
+ /*set full duplex*/
+ if (cmd->duplex == DUPLEX_FULL) {
+ /* force full duplex */
+ writel(readl(dev->base + TXCFG)
+ | TXCFG_CSI | TXCFG_HBI | TXCFG_ATP,
+ dev->base + TXCFG);
+ writel(readl(dev->base + RXCFG) | RXCFG_RX_FD,
+ dev->base + RXCFG);
+ /* Light up full duplex LED */
+ writel(readl(dev->base + GPIOR) | GPIOR_GP1_OUT,
+ dev->base + GPIOR);
+ } else {
+ /*TODO: set half duplex */
+ }
+
+ } else {
+ /*we have copper*/
+ /* TODO: Set duplex for copper cards */
+ }
+ printk(KERN_INFO "%s: Duplex set via ethtool\n",
+ ndev->name);
+ }
+
+ /* Set autonegotiation */
+ if (1) {
+ if (cmd->autoneg == AUTONEG_ENABLE) {
+ /* restart auto negotiation */
+ writel(TBICR_MR_AN_ENABLE | TBICR_MR_RESTART_AN,
+ dev->base + TBICR);
+ writel(TBICR_MR_AN_ENABLE, dev->base + TBICR);
+ dev->linkstate = LINK_AUTONEGOTIATE;
+
+ printk(KERN_INFO "%s: autoneg enabled via ethtool\n",
+ ndev->name);
+ } else {
+ /* disable auto negotiation */
+ writel(0x00000000, dev->base + TBICR);
+ }
+
+ printk(KERN_INFO "%s: autoneg %s via ethtool\n", ndev->name,
+ cmd->autoneg ? "ENABLED" : "DISABLED");
+ }
+
+ phy_intr(ndev);
+ spin_unlock(&dev->tx_lock);
+ spin_unlock_irq(&dev->misc_lock);
+
+ return 0;
+}
+/* end ethtool get/set support -df */
+
+static void ns83820_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ strlcpy(info->driver, "ns83820", sizeof(info->driver));
+ strlcpy(info->version, VERSION, sizeof(info->version));
+ strlcpy(info->bus_info, pci_name(dev->pci_dev), sizeof(info->bus_info));
+}
+
+static u32 ns83820_get_link(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ u32 cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY;
+ return cfg & CFG_LNKSTS ? 1 : 0;
+}
+
+static const struct ethtool_ops ops = {
+ .get_settings = ns83820_get_settings,
+ .set_settings = ns83820_set_settings,
+ .get_drvinfo = ns83820_get_drvinfo,
+ .get_link = ns83820_get_link
+};
+
+static inline void ns83820_disable_interrupts(struct ns83820 *dev)
+{
+ writel(0, dev->base + IMR);
+ writel(0, dev->base + IER);
+ readl(dev->base + IER);
+}
+
+/* this function is called in irq context from the ISR */
+static void ns83820_mib_isr(struct ns83820 *dev)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&dev->misc_lock, flags);
+ ns83820_update_stats(dev);
+ spin_unlock_irqrestore(&dev->misc_lock, flags);
+}
+
+static void ns83820_do_isr(struct net_device *ndev, u32 isr);
+static irqreturn_t ns83820_irq(int foo, void *data)
+{
+ struct net_device *ndev = data;
+ struct ns83820 *dev = PRIV(ndev);
+ u32 isr;
+ dprintk("ns83820_irq(%p)\n", ndev);
+
+ dev->ihr = 0;
+
+ isr = readl(dev->base + ISR);
+ dprintk("irq: %08x\n", isr);
+ ns83820_do_isr(ndev, isr);
+ return IRQ_HANDLED;
+}
+
+static void ns83820_do_isr(struct net_device *ndev, u32 isr)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ unsigned long flags;
+
+#ifdef DEBUG
+ if (isr & ~(ISR_PHY | ISR_RXDESC | ISR_RXEARLY | ISR_RXOK | ISR_RXERR | ISR_TXIDLE | ISR_TXOK | ISR_TXDESC))
+ Dprintk("odd isr? 0x%08x\n", isr);
+#endif
+
+ if (ISR_RXIDLE & isr) {
+ dev->rx_info.idle = 1;
+ Dprintk("oh dear, we are idle\n");
+ ns83820_rx_kick(ndev);
+ }
+
+ if ((ISR_RXDESC | ISR_RXOK) & isr) {
+ prefetch(dev->rx_info.next_rx_desc);
+
+ spin_lock_irqsave(&dev->misc_lock, flags);
+ dev->IMR_cache &= ~(ISR_RXDESC | ISR_RXOK);
+ writel(dev->IMR_cache, dev->base + IMR);
+ spin_unlock_irqrestore(&dev->misc_lock, flags);
+
+ tasklet_schedule(&dev->rx_tasklet);
+ //rx_irq(ndev);
+ //writel(4, dev->base + IHR);
+ }
+
+ if ((ISR_RXIDLE | ISR_RXORN | ISR_RXDESC | ISR_RXOK | ISR_RXERR) & isr)
+ ns83820_rx_kick(ndev);
+
+ if (unlikely(ISR_RXSOVR & isr)) {
+ //printk("overrun: rxsovr\n");
+ ndev->stats.rx_fifo_errors++;
+ }
+
+ if (unlikely(ISR_RXORN & isr)) {
+ //printk("overrun: rxorn\n");
+ ndev->stats.rx_fifo_errors++;
+ }
+
+ if ((ISR_RXRCMP & isr) && dev->rx_info.up)
+ writel(CR_RXE, dev->base + CR);
+
+ if (ISR_TXIDLE & isr) {
+ u32 txdp;
+ txdp = readl(dev->base + TXDP);
+ dprintk("txdp: %08x\n", txdp);
+ txdp -= dev->tx_phy_descs;
+ dev->tx_idx = txdp / (DESC_SIZE * 4);
+ if (dev->tx_idx >= NR_TX_DESC) {
+ printk(KERN_ALERT "%s: BUG -- txdp out of range\n", ndev->name);
+ dev->tx_idx = 0;
+ }
+ /* The may have been a race between a pci originated read
+ * and the descriptor update from the cpu. Just in case,
+ * kick the transmitter if the hardware thinks it is on a
+ * different descriptor than we are.
+ */
+ if (dev->tx_idx != dev->tx_free_idx)
+ kick_tx(dev);
+ }
+
+ /* Defer tx ring processing until more than a minimum amount of
+ * work has accumulated
+ */
+ if ((ISR_TXDESC | ISR_TXIDLE | ISR_TXOK | ISR_TXERR) & isr) {
+ spin_lock_irqsave(&dev->tx_lock, flags);
+ do_tx_done(ndev);
+ spin_unlock_irqrestore(&dev->tx_lock, flags);
+
+ /* Disable TxOk if there are no outstanding tx packets.
+ */
+ if ((dev->tx_done_idx == dev->tx_free_idx) &&
+ (dev->IMR_cache & ISR_TXOK)) {
+ spin_lock_irqsave(&dev->misc_lock, flags);
+ dev->IMR_cache &= ~ISR_TXOK;
+ writel(dev->IMR_cache, dev->base + IMR);
+ spin_unlock_irqrestore(&dev->misc_lock, flags);
+ }
+ }
+
+ /* The TxIdle interrupt can come in before the transmit has
+ * completed. Normally we reap packets off of the combination
+ * of TxDesc and TxIdle and leave TxOk disabled (since it
+ * occurs on every packet), but when no further irqs of this
+ * nature are expected, we must enable TxOk.
+ */
+ if ((ISR_TXIDLE & isr) && (dev->tx_done_idx != dev->tx_free_idx)) {
+ spin_lock_irqsave(&dev->misc_lock, flags);
+ dev->IMR_cache |= ISR_TXOK;
+ writel(dev->IMR_cache, dev->base + IMR);
+ spin_unlock_irqrestore(&dev->misc_lock, flags);
+ }
+
+ /* MIB interrupt: one of the statistics counters is about to overflow */
+ if (unlikely(ISR_MIB & isr))
+ ns83820_mib_isr(dev);
+
+ /* PHY: Link up/down/negotiation state change */
+ if (unlikely(ISR_PHY & isr))
+ phy_intr(ndev);
+
+#if 0 /* Still working on the interrupt mitigation strategy */
+ if (dev->ihr)
+ writel(dev->ihr, dev->base + IHR);
+#endif
+}
+
+static void ns83820_do_reset(struct ns83820 *dev, u32 which)
+{
+ Dprintk("resetting chip...\n");
+ writel(which, dev->base + CR);
+ do {
+ schedule();
+ } while (readl(dev->base + CR) & which);
+ Dprintk("okay!\n");
+}
+
+static int ns83820_stop(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+
+ /* FIXME: protect against interrupt handler? */
+ del_timer_sync(&dev->tx_watchdog);
+
+ ns83820_disable_interrupts(dev);
+
+ dev->rx_info.up = 0;
+ synchronize_irq(dev->pci_dev->irq);
+
+ ns83820_do_reset(dev, CR_RST);
+
+ synchronize_irq(dev->pci_dev->irq);
+
+ spin_lock_irq(&dev->misc_lock);
+ dev->IMR_cache &= ~(ISR_TXURN | ISR_TXIDLE | ISR_TXERR | ISR_TXDESC | ISR_TXOK);
+ spin_unlock_irq(&dev->misc_lock);
+
+ ns83820_cleanup_rx(dev);
+ ns83820_cleanup_tx(dev);
+
+ return 0;
+}
+
+static void ns83820_tx_timeout(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ u32 tx_done_idx;
+ __le32 *desc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->tx_lock, flags);
+
+ tx_done_idx = dev->tx_done_idx;
+ desc = dev->tx_descs + (tx_done_idx * DESC_SIZE);
+
+ printk(KERN_INFO "%s: tx_timeout: tx_done_idx=%d free_idx=%d cmdsts=%08x\n",
+ ndev->name,
+ tx_done_idx, dev->tx_free_idx, le32_to_cpu(desc[DESC_CMDSTS]));
+
+#if defined(DEBUG)
+ {
+ u32 isr;
+ isr = readl(dev->base + ISR);
+ printk("irq: %08x imr: %08x\n", isr, dev->IMR_cache);
+ ns83820_do_isr(ndev, isr);
+ }
+#endif
+
+ do_tx_done(ndev);
+
+ tx_done_idx = dev->tx_done_idx;
+ desc = dev->tx_descs + (tx_done_idx * DESC_SIZE);
+
+ printk(KERN_INFO "%s: after: tx_done_idx=%d free_idx=%d cmdsts=%08x\n",
+ ndev->name,
+ tx_done_idx, dev->tx_free_idx, le32_to_cpu(desc[DESC_CMDSTS]));
+
+ spin_unlock_irqrestore(&dev->tx_lock, flags);
+}
+
+static void ns83820_tx_watch(unsigned long data)
+{
+ struct net_device *ndev = (void *)data;
+ struct ns83820 *dev = PRIV(ndev);
+
+#if defined(DEBUG)
+ printk("ns83820_tx_watch: %u %u %d\n",
+ dev->tx_done_idx, dev->tx_free_idx, atomic_read(&dev->nr_tx_skbs)
+ );
+#endif
+
+ if (time_after(jiffies, dev_trans_start(ndev) + 1*HZ) &&
+ dev->tx_done_idx != dev->tx_free_idx) {
+ printk(KERN_DEBUG "%s: ns83820_tx_watch: %u %u %d\n",
+ ndev->name,
+ dev->tx_done_idx, dev->tx_free_idx,
+ atomic_read(&dev->nr_tx_skbs));
+ ns83820_tx_timeout(ndev);
+ }
+
+ mod_timer(&dev->tx_watchdog, jiffies + 2*HZ);
+}
+
+static int ns83820_open(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ unsigned i;
+ u32 desc;
+ int ret;
+
+ dprintk("ns83820_open\n");
+
+ writel(0, dev->base + PQCR);
+
+ ret = ns83820_setup_rx(ndev);
+ if (ret)
+ goto failed;
+
+ memset(dev->tx_descs, 0, 4 * NR_TX_DESC * DESC_SIZE);
+ for (i=0; i<NR_TX_DESC; i++) {
+ dev->tx_descs[(i * DESC_SIZE) + DESC_LINK]
+ = cpu_to_le32(
+ dev->tx_phy_descs
+ + ((i+1) % NR_TX_DESC) * DESC_SIZE * 4);
+ }
+
+ dev->tx_idx = 0;
+ dev->tx_done_idx = 0;
+ desc = dev->tx_phy_descs;
+ writel(0, dev->base + TXDP_HI);
+ writel(desc, dev->base + TXDP);
+
+ init_timer(&dev->tx_watchdog);
+ dev->tx_watchdog.data = (unsigned long)ndev;
+ dev->tx_watchdog.function = ns83820_tx_watch;
+ mod_timer(&dev->tx_watchdog, jiffies + 2*HZ);
+
+ netif_start_queue(ndev); /* FIXME: wait for phy to come up */
+
+ return 0;
+
+failed:
+ ns83820_stop(ndev);
+ return ret;
+}
+
+static void ns83820_getmac(struct ns83820 *dev, u8 *mac)
+{
+ unsigned i;
+ for (i=0; i<3; i++) {
+ u32 data;
+
+ /* Read from the perfect match memory: this is loaded by
+ * the chip from the EEPROM via the EELOAD self test.
+ */
+ writel(i*2, dev->base + RFCR);
+ data = readl(dev->base + RFDR);
+
+ *mac++ = data;
+ *mac++ = data >> 8;
+ }
+}
+
+static int ns83820_change_mtu(struct net_device *ndev, int new_mtu)
+{
+ if (new_mtu > RX_BUF_SIZE)
+ return -EINVAL;
+ ndev->mtu = new_mtu;
+ return 0;
+}
+
+static void ns83820_set_multicast(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ u8 __iomem *rfcr = dev->base + RFCR;
+ u32 and_mask = 0xffffffff;
+ u32 or_mask = 0;
+ u32 val;
+
+ if (ndev->flags & IFF_PROMISC)
+ or_mask |= RFCR_AAU | RFCR_AAM;
+ else
+ and_mask &= ~(RFCR_AAU | RFCR_AAM);
+
+ if (ndev->flags & IFF_ALLMULTI || netdev_mc_count(ndev))
+ or_mask |= RFCR_AAM;
+ else
+ and_mask &= ~RFCR_AAM;
+
+ spin_lock_irq(&dev->misc_lock);
+ val = (readl(rfcr) & and_mask) | or_mask;
+ /* Ramit : RFCR Write Fix doc says RFEN must be 0 modify other bits */
+ writel(val & ~RFCR_RFEN, rfcr);
+ writel(val, rfcr);
+ spin_unlock_irq(&dev->misc_lock);
+}
+
+static void ns83820_run_bist(struct net_device *ndev, const char *name, u32 enable, u32 done, u32 fail)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ int timed_out = 0;
+ unsigned long start;
+ u32 status;
+ int loops = 0;
+
+ dprintk("%s: start %s\n", ndev->name, name);
+
+ start = jiffies;
+
+ writel(enable, dev->base + PTSCR);
+ for (;;) {
+ loops++;
+ status = readl(dev->base + PTSCR);
+ if (!(status & enable))
+ break;
+ if (status & done)
+ break;
+ if (status & fail)
+ break;
+ if (time_after_eq(jiffies, start + HZ)) {
+ timed_out = 1;
+ break;
+ }
+ schedule_timeout_uninterruptible(1);
+ }
+
+ if (status & fail)
+ printk(KERN_INFO "%s: %s failed! (0x%08x & 0x%08x)\n",
+ ndev->name, name, status, fail);
+ else if (timed_out)
+ printk(KERN_INFO "%s: run_bist %s timed out! (%08x)\n",
+ ndev->name, name, status);
+
+ dprintk("%s: done %s in %d loops\n", ndev->name, name, loops);
+}
+
+#ifdef PHY_CODE_IS_FINISHED
+static void ns83820_mii_write_bit(struct ns83820 *dev, int bit)
+{
+ /* drive MDC low */
+ dev->MEAR_cache &= ~MEAR_MDC;
+ writel(dev->MEAR_cache, dev->base + MEAR);
+ readl(dev->base + MEAR);
+
+ /* enable output, set bit */
+ dev->MEAR_cache |= MEAR_MDDIR;
+ if (bit)
+ dev->MEAR_cache |= MEAR_MDIO;
+ else
+ dev->MEAR_cache &= ~MEAR_MDIO;
+
+ /* set the output bit */
+ writel(dev->MEAR_cache, dev->base + MEAR);
+ readl(dev->base + MEAR);
+
+ /* Wait. Max clock rate is 2.5MHz, this way we come in under 1MHz */
+ udelay(1);
+
+ /* drive MDC high causing the data bit to be latched */
+ dev->MEAR_cache |= MEAR_MDC;
+ writel(dev->MEAR_cache, dev->base + MEAR);
+ readl(dev->base + MEAR);
+
+ /* Wait again... */
+ udelay(1);
+}
+
+static int ns83820_mii_read_bit(struct ns83820 *dev)
+{
+ int bit;
+
+ /* drive MDC low, disable output */
+ dev->MEAR_cache &= ~MEAR_MDC;
+ dev->MEAR_cache &= ~MEAR_MDDIR;
+ writel(dev->MEAR_cache, dev->base + MEAR);
+ readl(dev->base + MEAR);
+
+ /* Wait. Max clock rate is 2.5MHz, this way we come in under 1MHz */
+ udelay(1);
+
+ /* drive MDC high causing the data bit to be latched */
+ bit = (readl(dev->base + MEAR) & MEAR_MDIO) ? 1 : 0;
+ dev->MEAR_cache |= MEAR_MDC;
+ writel(dev->MEAR_cache, dev->base + MEAR);
+
+ /* Wait again... */
+ udelay(1);
+
+ return bit;
+}
+
+static unsigned ns83820_mii_read_reg(struct ns83820 *dev, unsigned phy, unsigned reg)
+{
+ unsigned data = 0;
+ int i;
+
+ /* read some garbage so that we eventually sync up */
+ for (i=0; i<64; i++)
+ ns83820_mii_read_bit(dev);
+
+ ns83820_mii_write_bit(dev, 0); /* start */
+ ns83820_mii_write_bit(dev, 1);
+ ns83820_mii_write_bit(dev, 1); /* opcode read */
+ ns83820_mii_write_bit(dev, 0);
+
+ /* write out the phy address: 5 bits, msb first */
+ for (i=0; i<5; i++)
+ ns83820_mii_write_bit(dev, phy & (0x10 >> i));
+
+ /* write out the register address, 5 bits, msb first */
+ for (i=0; i<5; i++)
+ ns83820_mii_write_bit(dev, reg & (0x10 >> i));
+
+ ns83820_mii_read_bit(dev); /* turn around cycles */
+ ns83820_mii_read_bit(dev);
+
+ /* read in the register data, 16 bits msb first */
+ for (i=0; i<16; i++) {
+ data <<= 1;
+ data |= ns83820_mii_read_bit(dev);
+ }
+
+ return data;
+}
+
+static unsigned ns83820_mii_write_reg(struct ns83820 *dev, unsigned phy, unsigned reg, unsigned data)
+{
+ int i;
+
+ /* read some garbage so that we eventually sync up */
+ for (i=0; i<64; i++)
+ ns83820_mii_read_bit(dev);
+
+ ns83820_mii_write_bit(dev, 0); /* start */
+ ns83820_mii_write_bit(dev, 1);
+ ns83820_mii_write_bit(dev, 0); /* opcode read */
+ ns83820_mii_write_bit(dev, 1);
+
+ /* write out the phy address: 5 bits, msb first */
+ for (i=0; i<5; i++)
+ ns83820_mii_write_bit(dev, phy & (0x10 >> i));
+
+ /* write out the register address, 5 bits, msb first */
+ for (i=0; i<5; i++)
+ ns83820_mii_write_bit(dev, reg & (0x10 >> i));
+
+ ns83820_mii_read_bit(dev); /* turn around cycles */
+ ns83820_mii_read_bit(dev);
+
+ /* read in the register data, 16 bits msb first */
+ for (i=0; i<16; i++)
+ ns83820_mii_write_bit(dev, (data >> (15 - i)) & 1);
+
+ return data;
+}
+
+static void ns83820_probe_phy(struct net_device *ndev)
+{
+ struct ns83820 *dev = PRIV(ndev);
+ static int first;
+ int i;
+#define MII_PHYIDR1 0x02
+#define MII_PHYIDR2 0x03
+
+#if 0
+ if (!first) {
+ unsigned tmp;
+ ns83820_mii_read_reg(dev, 1, 0x09);
+ ns83820_mii_write_reg(dev, 1, 0x10, 0x0d3e);
+
+ tmp = ns83820_mii_read_reg(dev, 1, 0x00);
+ ns83820_mii_write_reg(dev, 1, 0x00, tmp | 0x8000);
+ udelay(1300);
+ ns83820_mii_read_reg(dev, 1, 0x09);
+ }
+#endif
+ first = 1;
+
+ for (i=1; i<2; i++) {
+ int j;
+ unsigned a, b;
+ a = ns83820_mii_read_reg(dev, i, MII_PHYIDR1);
+ b = ns83820_mii_read_reg(dev, i, MII_PHYIDR2);
+
+ //printk("%s: phy %d: 0x%04x 0x%04x\n",
+ // ndev->name, i, a, b);
+
+ for (j=0; j<0x16; j+=4) {
+ dprintk("%s: [0x%02x] %04x %04x %04x %04x\n",
+ ndev->name, j,
+ ns83820_mii_read_reg(dev, i, 0 + j),
+ ns83820_mii_read_reg(dev, i, 1 + j),
+ ns83820_mii_read_reg(dev, i, 2 + j),
+ ns83820_mii_read_reg(dev, i, 3 + j)
+ );
+ }
+ }
+ {
+ unsigned a, b;
+ /* read firmware version: memory addr is 0x8402 and 0x8403 */
+ ns83820_mii_write_reg(dev, 1, 0x16, 0x000d);
+ ns83820_mii_write_reg(dev, 1, 0x1e, 0x810e);
+ a = ns83820_mii_read_reg(dev, 1, 0x1d);
+
+ ns83820_mii_write_reg(dev, 1, 0x16, 0x000d);
+ ns83820_mii_write_reg(dev, 1, 0x1e, 0x810e);
+ b = ns83820_mii_read_reg(dev, 1, 0x1d);
+ dprintk("version: 0x%04x 0x%04x\n", a, b);
+ }
+}
+#endif
+
+static const struct net_device_ops netdev_ops = {
+ .ndo_open = ns83820_open,
+ .ndo_stop = ns83820_stop,
+ .ndo_start_xmit = ns83820_hard_start_xmit,
+ .ndo_get_stats = ns83820_get_stats,
+ .ndo_change_mtu = ns83820_change_mtu,
+ .ndo_set_rx_mode = ns83820_set_multicast,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_tx_timeout = ns83820_tx_timeout,
+};
+
+static int ns83820_init_one(struct pci_dev *pci_dev,
+ const struct pci_device_id *id)
+{
+ struct net_device *ndev;
+ struct ns83820 *dev;
+ long addr;
+ int err;
+ int using_dac = 0;
+
+ /* See if we can set the dma mask early on; failure is fatal. */
+ if (sizeof(dma_addr_t) == 8 &&
+ !pci_set_dma_mask(pci_dev, DMA_BIT_MASK(64))) {
+ using_dac = 1;
+ } else if (!pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32))) {
+ using_dac = 0;
+ } else {
+ dev_warn(&pci_dev->dev, "pci_set_dma_mask failed!\n");
+ return -ENODEV;
+ }
+
+ ndev = alloc_etherdev(sizeof(struct ns83820));
+ err = -ENOMEM;
+ if (!ndev)
+ goto out;
+
+ dev = PRIV(ndev);
+ dev->ndev = ndev;
+
+ spin_lock_init(&dev->rx_info.lock);
+ spin_lock_init(&dev->tx_lock);
+ spin_lock_init(&dev->misc_lock);
+ dev->pci_dev = pci_dev;
+
+ SET_NETDEV_DEV(ndev, &pci_dev->dev);
+
+ INIT_WORK(&dev->tq_refill, queue_refill);
+ tasklet_init(&dev->rx_tasklet, rx_action, (unsigned long)ndev);
+
+ err = pci_enable_device(pci_dev);
+ if (err) {
+ dev_info(&pci_dev->dev, "pci_enable_dev failed: %d\n", err);
+ goto out_free;
+ }
+
+ pci_set_master(pci_dev);
+ addr = pci_resource_start(pci_dev, 1);
+ dev->base = ioremap_nocache(addr, PAGE_SIZE);
+ dev->tx_descs = pci_alloc_consistent(pci_dev,
+ 4 * DESC_SIZE * NR_TX_DESC, &dev->tx_phy_descs);
+ dev->rx_info.descs = pci_alloc_consistent(pci_dev,
+ 4 * DESC_SIZE * NR_RX_DESC, &dev->rx_info.phy_descs);
+ err = -ENOMEM;
+ if (!dev->base || !dev->tx_descs || !dev->rx_info.descs)
+ goto out_disable;
+
+ dprintk("%p: %08lx %p: %08lx\n",
+ dev->tx_descs, (long)dev->tx_phy_descs,
+ dev->rx_info.descs, (long)dev->rx_info.phy_descs);
+
+ ns83820_disable_interrupts(dev);
+
+ dev->IMR_cache = 0;
+
+ err = request_irq(pci_dev->irq, ns83820_irq, IRQF_SHARED,
+ DRV_NAME, ndev);
+ if (err) {
+ dev_info(&pci_dev->dev, "unable to register irq %d, err %d\n",
+ pci_dev->irq, err);
+ goto out_disable;
+ }
+
+ /*
+ * FIXME: we are holding rtnl_lock() over obscenely long area only
+ * because some of the setup code uses dev->name. It's Wrong(tm) -
+ * we should be using driver-specific names for all that stuff.
+ * For now that will do, but we really need to come back and kill
+ * most of the dev_alloc_name() users later.
+ */
+ rtnl_lock();
+ err = dev_alloc_name(ndev, ndev->name);
+ if (err < 0) {
+ dev_info(&pci_dev->dev, "unable to get netdev name: %d\n", err);
+ goto out_free_irq;
+ }
+
+ printk("%s: ns83820.c: 0x22c: %08x, subsystem: %04x:%04x\n",
+ ndev->name, le32_to_cpu(readl(dev->base + 0x22c)),
+ pci_dev->subsystem_vendor, pci_dev->subsystem_device);
+
+ ndev->netdev_ops = &netdev_ops;
+ ndev->ethtool_ops = &ops;
+ ndev->watchdog_timeo = 5 * HZ;
+ pci_set_drvdata(pci_dev, ndev);
+
+ ns83820_do_reset(dev, CR_RST);
+
+ /* Must reset the ram bist before running it */
+ writel(PTSCR_RBIST_RST, dev->base + PTSCR);
+ ns83820_run_bist(ndev, "sram bist", PTSCR_RBIST_EN,
+ PTSCR_RBIST_DONE, PTSCR_RBIST_FAIL);
+ ns83820_run_bist(ndev, "eeprom bist", PTSCR_EEBIST_EN, 0,
+ PTSCR_EEBIST_FAIL);
+ ns83820_run_bist(ndev, "eeprom load", PTSCR_EELOAD_EN, 0, 0);
+
+ /* I love config registers */
+ dev->CFG_cache = readl(dev->base + CFG);
+
+ if ((dev->CFG_cache & CFG_PCI64_DET)) {
+ printk(KERN_INFO "%s: detected 64 bit PCI data bus.\n",
+ ndev->name);
+ /*dev->CFG_cache |= CFG_DATA64_EN;*/
+ if (!(dev->CFG_cache & CFG_DATA64_EN))
+ printk(KERN_INFO "%s: EEPROM did not enable 64 bit bus. Disabled.\n",
+ ndev->name);
+ } else
+ dev->CFG_cache &= ~(CFG_DATA64_EN);
+
+ dev->CFG_cache &= (CFG_TBI_EN | CFG_MRM_DIS | CFG_MWI_DIS |
+ CFG_T64ADDR | CFG_DATA64_EN | CFG_EXT_125 |
+ CFG_M64ADDR);
+ dev->CFG_cache |= CFG_PINT_DUPSTS | CFG_PINT_LNKSTS | CFG_PINT_SPDSTS |
+ CFG_EXTSTS_EN | CFG_EXD | CFG_PESEL;
+ dev->CFG_cache |= CFG_REQALG;
+ dev->CFG_cache |= CFG_POW;
+ dev->CFG_cache |= CFG_TMRTEST;
+
+ /* When compiled with 64 bit addressing, we must always enable
+ * the 64 bit descriptor format.
+ */
+ if (sizeof(dma_addr_t) == 8)
+ dev->CFG_cache |= CFG_M64ADDR;
+ if (using_dac)
+ dev->CFG_cache |= CFG_T64ADDR;
+
+ /* Big endian mode does not seem to do what the docs suggest */
+ dev->CFG_cache &= ~CFG_BEM;
+
+ /* setup optical transceiver if we have one */
+ if (dev->CFG_cache & CFG_TBI_EN) {
+ printk(KERN_INFO "%s: enabling optical transceiver\n",
+ ndev->name);
+ writel(readl(dev->base + GPIOR) | 0x3e8, dev->base + GPIOR);
+
+ /* setup auto negotiation feature advertisement */
+ writel(readl(dev->base + TANAR)
+ | TANAR_HALF_DUP | TANAR_FULL_DUP,
+ dev->base + TANAR);
+
+ /* start auto negotiation */
+ writel(TBICR_MR_AN_ENABLE | TBICR_MR_RESTART_AN,
+ dev->base + TBICR);
+ writel(TBICR_MR_AN_ENABLE, dev->base + TBICR);
+ dev->linkstate = LINK_AUTONEGOTIATE;
+
+ dev->CFG_cache |= CFG_MODE_1000;
+ }
+
+ writel(dev->CFG_cache, dev->base + CFG);
+ dprintk("CFG: %08x\n", dev->CFG_cache);
+
+ if (reset_phy) {
+ printk(KERN_INFO "%s: resetting phy\n", ndev->name);
+ writel(dev->CFG_cache | CFG_PHY_RST, dev->base + CFG);
+ msleep(10);
+ writel(dev->CFG_cache, dev->base + CFG);
+ }
+
+#if 0 /* Huh? This sets the PCI latency register. Should be done via
+ * the PCI layer. FIXME.
+ */
+ if (readl(dev->base + SRR))
+ writel(readl(dev->base+0x20c) | 0xfe00, dev->base + 0x20c);
+#endif
+
+ /* Note! The DMA burst size interacts with packet
+ * transmission, such that the largest packet that
+ * can be transmitted is 8192 - FLTH - burst size.
+ * If only the transmit fifo was larger...
+ */
+ /* Ramit : 1024 DMA is not a good idea, it ends up banging
+ * some DELL and COMPAQ SMP systems */
+ writel(TXCFG_CSI | TXCFG_HBI | TXCFG_ATP | TXCFG_MXDMA512
+ | ((1600 / 32) * 0x100),
+ dev->base + TXCFG);
+
+ /* Flush the interrupt holdoff timer */
+ writel(0x000, dev->base + IHR);
+ writel(0x100, dev->base + IHR);
+ writel(0x000, dev->base + IHR);
+
+ /* Set Rx to full duplex, don't accept runt, errored, long or length
+ * range errored packets. Use 512 byte DMA.
+ */
+ /* Ramit : 1024 DMA is not a good idea, it ends up banging
+ * some DELL and COMPAQ SMP systems
+ * Turn on ALP, only we are accpeting Jumbo Packets */
+ writel(RXCFG_AEP | RXCFG_ARP | RXCFG_AIRL | RXCFG_RX_FD
+ | RXCFG_STRIPCRC
+ //| RXCFG_ALP
+ | (RXCFG_MXDMA512) | 0, dev->base + RXCFG);
+
+ /* Disable priority queueing */
+ writel(0, dev->base + PQCR);
+
+ /* Enable IP checksum validation and detetion of VLAN headers.
+ * Note: do not set the reject options as at least the 0x102
+ * revision of the chip does not properly accept IP fragments
+ * at least for UDP.
+ */
+ /* Ramit : Be sure to turn on RXCFG_ARP if VLAN's are enabled, since
+ * the MAC it calculates the packetsize AFTER stripping the VLAN
+ * header, and if a VLAN Tagged packet of 64 bytes is received (like
+ * a ping with a VLAN header) then the card, strips the 4 byte VLAN
+ * tag and then checks the packet size, so if RXCFG_ARP is not enabled,
+ * it discrards it!. These guys......
+ * also turn on tag stripping if hardware acceleration is enabled
+ */
+#ifdef NS83820_VLAN_ACCEL_SUPPORT
+#define VRCR_INIT_VALUE (VRCR_IPEN|VRCR_VTDEN|VRCR_VTREN)
+#else
+#define VRCR_INIT_VALUE (VRCR_IPEN|VRCR_VTDEN)
+#endif
+ writel(VRCR_INIT_VALUE, dev->base + VRCR);
+
+ /* Enable per-packet TCP/UDP/IP checksumming
+ * and per packet vlan tag insertion if
+ * vlan hardware acceleration is enabled
+ */
+#ifdef NS83820_VLAN_ACCEL_SUPPORT
+#define VTCR_INIT_VALUE (VTCR_PPCHK|VTCR_VPPTI)
+#else
+#define VTCR_INIT_VALUE VTCR_PPCHK
+#endif
+ writel(VTCR_INIT_VALUE, dev->base + VTCR);
+
+ /* Ramit : Enable async and sync pause frames */
+ /* writel(0, dev->base + PCR); */
+ writel((PCR_PS_MCAST | PCR_PS_DA | PCR_PSEN | PCR_FFLO_4K |
+ PCR_FFHI_8K | PCR_STLO_4 | PCR_STHI_8 | PCR_PAUSE_CNT),
+ dev->base + PCR);
+
+ /* Disable Wake On Lan */
+ writel(0, dev->base + WCSR);
+
+ ns83820_getmac(dev, ndev->dev_addr);
+
+ /* Yes, we support dumb IP checksum on transmit */
+ ndev->features |= NETIF_F_SG;
+ ndev->features |= NETIF_F_IP_CSUM;
+
+#ifdef NS83820_VLAN_ACCEL_SUPPORT
+ /* We also support hardware vlan acceleration */
+ ndev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
+#endif
+
+ if (using_dac) {
+ printk(KERN_INFO "%s: using 64 bit addressing.\n",
+ ndev->name);
+ ndev->features |= NETIF_F_HIGHDMA;
+ }
+
+ printk(KERN_INFO "%s: ns83820 v" VERSION ": DP83820 v%u.%u: %pM io=0x%08lx irq=%d f=%s\n",
+ ndev->name,
+ (unsigned)readl(dev->base + SRR) >> 8,
+ (unsigned)readl(dev->base + SRR) & 0xff,
+ ndev->dev_addr, addr, pci_dev->irq,
+ (ndev->features & NETIF_F_HIGHDMA) ? "h,sg" : "sg"
+ );
+
+#ifdef PHY_CODE_IS_FINISHED
+ ns83820_probe_phy(ndev);
+#endif
+
+ err = register_netdevice(ndev);
+ if (err) {
+ printk(KERN_INFO "ns83820: unable to register netdev: %d\n", err);
+ goto out_cleanup;
+ }
+ rtnl_unlock();
+
+ return 0;
+
+out_cleanup:
+ ns83820_disable_interrupts(dev); /* paranoia */
+out_free_irq:
+ rtnl_unlock();
+ free_irq(pci_dev->irq, ndev);
+out_disable:
+ if (dev->base)
+ iounmap(dev->base);
+ pci_free_consistent(pci_dev, 4 * DESC_SIZE * NR_TX_DESC, dev->tx_descs, dev->tx_phy_descs);
+ pci_free_consistent(pci_dev, 4 * DESC_SIZE * NR_RX_DESC, dev->rx_info.descs, dev->rx_info.phy_descs);
+ pci_disable_device(pci_dev);
+out_free:
+ free_netdev(ndev);
+out:
+ return err;
+}
+
+static void ns83820_remove_one(struct pci_dev *pci_dev)
+{
+ struct net_device *ndev = pci_get_drvdata(pci_dev);
+ struct ns83820 *dev = PRIV(ndev); /* ok even if NULL */
+
+ if (!ndev) /* paranoia */
+ return;
+
+ ns83820_disable_interrupts(dev); /* paranoia */
+
+ unregister_netdev(ndev);
+ free_irq(dev->pci_dev->irq, ndev);
+ iounmap(dev->base);
+ pci_free_consistent(dev->pci_dev, 4 * DESC_SIZE * NR_TX_DESC,
+ dev->tx_descs, dev->tx_phy_descs);
+ pci_free_consistent(dev->pci_dev, 4 * DESC_SIZE * NR_RX_DESC,
+ dev->rx_info.descs, dev->rx_info.phy_descs);
+ pci_disable_device(dev->pci_dev);
+ free_netdev(ndev);
+}
+
+static const struct pci_device_id ns83820_pci_tbl[] = {
+ { 0x100b, 0x0022, PCI_ANY_ID, PCI_ANY_ID, 0, .driver_data = 0, },
+ { 0, },
+};
+
+static struct pci_driver driver = {
+ .name = "ns83820",
+ .id_table = ns83820_pci_tbl,
+ .probe = ns83820_init_one,
+ .remove = ns83820_remove_one,
+#if 0 /* FIXME: implement */
+ .suspend = ,
+ .resume = ,
+#endif
+};
+
+
+static int __init ns83820_init(void)
+{
+ printk(KERN_INFO "ns83820.c: National Semiconductor DP83820 10/100/1000 driver.\n");
+ return pci_register_driver(&driver);
+}
+
+static void __exit ns83820_exit(void)
+{
+ pci_unregister_driver(&driver);
+}
+
+MODULE_AUTHOR("Benjamin LaHaise <bcrl@kvack.org>");
+MODULE_DESCRIPTION("National Semiconductor DP83820 10/100/1000 driver");
+MODULE_LICENSE("GPL");
+
+MODULE_DEVICE_TABLE(pci, ns83820_pci_tbl);
+
+module_param(lnksts, int, 0);
+MODULE_PARM_DESC(lnksts, "Polarity of LNKSTS bit");
+
+module_param(ihr, int, 0);
+MODULE_PARM_DESC(ihr, "Time in 100 us increments to delay interrupts (range 0-127)");
+
+module_param(reset_phy, int, 0);
+MODULE_PARM_DESC(reset_phy, "Set to 1 to reset the PHY on startup");
+
+module_init(ns83820_init);
+module_exit(ns83820_exit);
Code Review / kvmfornfv.git / blobdiff