diff options
Diffstat (limited to 'drivers/net/ethernet/3com/typhoon.c')
| -rw-r--r-- | drivers/net/ethernet/3com/typhoon.c | 2569 |
1 files changed, 2569 insertions, 0 deletions
diff --git a/drivers/net/ethernet/3com/typhoon.c b/drivers/net/ethernet/3com/typhoon.c new file mode 100644 index 000000000000..20ea07508ac7 --- /dev/null +++ b/drivers/net/ethernet/3com/typhoon.c @@ -0,0 +1,2569 @@ +/* typhoon.c: A Linux Ethernet device driver for 3Com 3CR990 family of NICs */ +/* + Written 2002-2004 by David Dillow <dave@thedillows.org> + Based on code written 1998-2000 by Donald Becker <becker@scyld.com> and + Linux 2.2.x driver by David P. McLean <davidpmclean@yahoo.com>. + + This software may be used and distributed according to the terms of + the GNU General Public License (GPL), incorporated herein by reference. + Drivers based on or derived from this code fall under the GPL and must + retain the authorship, copyright and license notice. This file is not + a complete program and may only be used when the entire operating + system is licensed under the GPL. + + This software is available on a public web site. It may enable + cryptographic capabilities of the 3Com hardware, and may be + exported from the United States under License Exception "TSU" + pursuant to 15 C.F.R. Section 740.13(e). + + This work was funded by the National Library of Medicine under + the Department of Energy project number 0274DD06D1 and NLM project + number Y1-LM-2015-01. + + This driver is designed for the 3Com 3CR990 Family of cards with the + 3XP Processor. It has been tested on x86 and sparc64. + + KNOWN ISSUES: + *) Cannot DMA Rx packets to a 2 byte aligned address. Also firmware + issue. Hopefully 3Com will fix it. + *) Waiting for a command response takes 8ms due to non-preemptable + polling. Only significant for getting stats and creating + SAs, but an ugly wart never the less. + + TODO: + *) Doesn't do IPSEC offloading. Yet. Keep yer pants on, it's coming. + *) Add more support for ethtool (especially for NIC stats) + *) Allow disabling of RX checksum offloading + *) Fix MAC changing to work while the interface is up + (Need to put commands on the TX ring, which changes + the locking) + *) Add in FCS to {rx,tx}_bytes, since the hardware doesn't. See + http://oss.sgi.com/cgi-bin/mesg.cgi?a=netdev&i=20031215152211.7003fe8e.rddunlap%40osdl.org +*/ + +/* Set the copy breakpoint for the copy-only-tiny-frames scheme. + * Setting to > 1518 effectively disables this feature. + */ +static int rx_copybreak = 200; + +/* Should we use MMIO or Port IO? + * 0: Port IO + * 1: MMIO + * 2: Try MMIO, fallback to Port IO + */ +static unsigned int use_mmio = 2; + +/* end user-configurable values */ + +/* Maximum number of multicast addresses to filter (vs. rx-all-multicast). + */ +static const int multicast_filter_limit = 32; + +/* Operational parameters that are set at compile time. */ + +/* Keep the ring sizes a power of two for compile efficiency. + * The compiler will convert <unsigned>'%'<2^N> into a bit mask. + * Making the Tx ring too large decreases the effectiveness of channel + * bonding and packet priority. + * There are no ill effects from too-large receive rings. + * + * We don't currently use the Hi Tx ring so, don't make it very big. + * + * Beware that if we start using the Hi Tx ring, we will need to change + * typhoon_num_free_tx() and typhoon_tx_complete() to account for that. + */ +#define TXHI_ENTRIES 2 +#define TXLO_ENTRIES 128 +#define RX_ENTRIES 32 +#define COMMAND_ENTRIES 16 +#define RESPONSE_ENTRIES 32 + +#define COMMAND_RING_SIZE (COMMAND_ENTRIES * sizeof(struct cmd_desc)) +#define RESPONSE_RING_SIZE (RESPONSE_ENTRIES * sizeof(struct resp_desc)) + +/* The 3XP will preload and remove 64 entries from the free buffer + * list, and we need one entry to keep the ring from wrapping, so + * to keep this a power of two, we use 128 entries. + */ +#define RXFREE_ENTRIES 128 +#define RXENT_ENTRIES (RXFREE_ENTRIES - 1) + +/* Operational parameters that usually are not changed. */ + +/* Time in jiffies before concluding the transmitter is hung. */ +#define TX_TIMEOUT (2*HZ) + +#define PKT_BUF_SZ 1536 +#define FIRMWARE_NAME "3com/typhoon.bin" + +#define pr_fmt(fmt) KBUILD_MODNAME " " fmt + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/mm.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/ethtool.h> +#include <linux/if_vlan.h> +#include <linux/crc32.h> +#include <linux/bitops.h> +#include <asm/processor.h> +#include <asm/io.h> +#include <asm/uaccess.h> +#include <linux/in6.h> +#include <linux/dma-mapping.h> +#include <linux/firmware.h> + +#include "typhoon.h" + +MODULE_AUTHOR("David Dillow <dave@thedillows.org>"); +MODULE_VERSION("1.0"); +MODULE_LICENSE("GPL"); +MODULE_FIRMWARE(FIRMWARE_NAME); +MODULE_DESCRIPTION("3Com Typhoon Family (3C990, 3CR990, and variants)"); +MODULE_PARM_DESC(rx_copybreak, "Packets smaller than this are copied and " + "the buffer given back to the NIC. Default " + "is 200."); +MODULE_PARM_DESC(use_mmio, "Use MMIO (1) or PIO(0) to access the NIC. " + "Default is to try MMIO and fallback to PIO."); +module_param(rx_copybreak, int, 0); +module_param(use_mmio, int, 0); + +#if defined(NETIF_F_TSO) && MAX_SKB_FRAGS > 32 +#warning Typhoon only supports 32 entries in its SG list for TSO, disabling TSO +#undef NETIF_F_TSO +#endif + +#if TXLO_ENTRIES <= (2 * MAX_SKB_FRAGS) +#error TX ring too small! +#endif + +struct typhoon_card_info { + const char *name; + const int capabilities; +}; + +#define TYPHOON_CRYPTO_NONE 0x00 +#define TYPHOON_CRYPTO_DES 0x01 +#define TYPHOON_CRYPTO_3DES 0x02 +#define TYPHOON_CRYPTO_VARIABLE 0x04 +#define TYPHOON_FIBER 0x08 +#define TYPHOON_WAKEUP_NEEDS_RESET 0x10 + +enum typhoon_cards { + TYPHOON_TX = 0, TYPHOON_TX95, TYPHOON_TX97, TYPHOON_SVR, + TYPHOON_SVR95, TYPHOON_SVR97, TYPHOON_TXM, TYPHOON_BSVR, + TYPHOON_FX95, TYPHOON_FX97, TYPHOON_FX95SVR, TYPHOON_FX97SVR, + TYPHOON_FXM, +}; + +/* directly indexed by enum typhoon_cards, above */ +static struct typhoon_card_info typhoon_card_info[] __devinitdata = { + { "3Com Typhoon (3C990-TX)", + TYPHOON_CRYPTO_NONE}, + { "3Com Typhoon (3CR990-TX-95)", + TYPHOON_CRYPTO_DES}, + { "3Com Typhoon (3CR990-TX-97)", + TYPHOON_CRYPTO_DES | TYPHOON_CRYPTO_3DES}, + { "3Com Typhoon (3C990SVR)", + TYPHOON_CRYPTO_NONE}, + { "3Com Typhoon (3CR990SVR95)", + TYPHOON_CRYPTO_DES}, + { "3Com Typhoon (3CR990SVR97)", + TYPHOON_CRYPTO_DES | TYPHOON_CRYPTO_3DES}, + { "3Com Typhoon2 (3C990B-TX-M)", + TYPHOON_CRYPTO_VARIABLE}, + { "3Com Typhoon2 (3C990BSVR)", + TYPHOON_CRYPTO_VARIABLE}, + { "3Com Typhoon (3CR990-FX-95)", + TYPHOON_CRYPTO_DES | TYPHOON_FIBER}, + { "3Com Typhoon (3CR990-FX-97)", + TYPHOON_CRYPTO_DES | TYPHOON_CRYPTO_3DES | TYPHOON_FIBER}, + { "3Com Typhoon (3CR990-FX-95 Server)", + TYPHOON_CRYPTO_DES | TYPHOON_FIBER}, + { "3Com Typhoon (3CR990-FX-97 Server)", + TYPHOON_CRYPTO_DES | TYPHOON_CRYPTO_3DES | TYPHOON_FIBER}, + { "3Com Typhoon2 (3C990B-FX-97)", + TYPHOON_CRYPTO_VARIABLE | TYPHOON_FIBER}, +}; + +/* Notes on the new subsystem numbering scheme: + * bits 0-1 indicate crypto capabilities: (0) variable, (1) DES, or (2) 3DES + * bit 4 indicates if this card has secured firmware (we don't support it) + * bit 8 indicates if this is a (0) copper or (1) fiber card + * bits 12-16 indicate card type: (0) client and (1) server + */ +static DEFINE_PCI_DEVICE_TABLE(typhoon_pci_tbl) = { + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990, + PCI_ANY_ID, PCI_ANY_ID, 0, 0,TYPHOON_TX }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_TX_95, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPHOON_TX95 }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_TX_97, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPHOON_TX97 }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990B, + PCI_ANY_ID, 0x1000, 0, 0, TYPHOON_TXM }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990B, + PCI_ANY_ID, 0x1102, 0, 0, TYPHOON_FXM }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990B, + PCI_ANY_ID, 0x2000, 0, 0, TYPHOON_BSVR }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_FX, + PCI_ANY_ID, 0x1101, 0, 0, TYPHOON_FX95 }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_FX, + PCI_ANY_ID, 0x1102, 0, 0, TYPHOON_FX97 }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_FX, + PCI_ANY_ID, 0x2101, 0, 0, TYPHOON_FX95SVR }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990_FX, + PCI_ANY_ID, 0x2102, 0, 0, TYPHOON_FX97SVR }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990SVR95, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPHOON_SVR95 }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990SVR97, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPHOON_SVR97 }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3CR990SVR, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPHOON_SVR }, + { 0, } +}; +MODULE_DEVICE_TABLE(pci, typhoon_pci_tbl); + +/* Define the shared memory area + * Align everything the 3XP will normally be using. + * We'll need to move/align txHi if we start using that ring. + */ +#define __3xp_aligned ____cacheline_aligned +struct typhoon_shared { + struct typhoon_interface iface; + struct typhoon_indexes indexes __3xp_aligned; + struct tx_desc txLo[TXLO_ENTRIES] __3xp_aligned; + struct rx_desc rxLo[RX_ENTRIES] __3xp_aligned; + struct rx_desc rxHi[RX_ENTRIES] __3xp_aligned; + struct cmd_desc cmd[COMMAND_ENTRIES] __3xp_aligned; + struct resp_desc resp[RESPONSE_ENTRIES] __3xp_aligned; + struct rx_free rxBuff[RXFREE_ENTRIES] __3xp_aligned; + u32 zeroWord; + struct tx_desc txHi[TXHI_ENTRIES]; +} __packed; + +struct rxbuff_ent { + struct sk_buff *skb; + dma_addr_t dma_addr; +}; + +struct typhoon { + /* Tx cache line section */ + struct transmit_ring txLoRing ____cacheline_aligned; + struct pci_dev * tx_pdev; + void __iomem *tx_ioaddr; + u32 txlo_dma_addr; + + /* Irq/Rx cache line section */ + void __iomem *ioaddr ____cacheline_aligned; + struct typhoon_indexes *indexes; + u8 awaiting_resp; + u8 duplex; + u8 speed; + u8 card_state; + struct basic_ring rxLoRing; + struct pci_dev * pdev; + struct net_device * dev; + struct napi_struct napi; + struct basic_ring rxHiRing; + struct basic_ring rxBuffRing; + struct rxbuff_ent rxbuffers[RXENT_ENTRIES]; + + /* general section */ + spinlock_t command_lock ____cacheline_aligned; + struct basic_ring cmdRing; + struct basic_ring respRing; + struct net_device_stats stats; + struct net_device_stats stats_saved; + struct typhoon_shared * shared; + dma_addr_t shared_dma; + __le16 xcvr_select; + __le16 wol_events; + __le32 offload; + + /* unused stuff (future use) */ + int capabilities; + struct transmit_ring txHiRing; +}; + +enum completion_wait_values { + NoWait = 0, WaitNoSleep, WaitSleep, +}; + +/* These are the values for the typhoon.card_state variable. + * These determine where the statistics will come from in get_stats(). + * The sleep image does not support the statistics we need. + */ +enum state_values { + Sleeping = 0, Running, +}; + +/* PCI writes are not guaranteed to be posted in order, but outstanding writes + * cannot pass a read, so this forces current writes to post. + */ +#define typhoon_post_pci_writes(x) \ + do { if(likely(use_mmio)) ioread32(x+TYPHOON_REG_HEARTBEAT); } while(0) + +/* We'll wait up to six seconds for a reset, and half a second normally. + */ +#define TYPHOON_UDELAY 50 +#define TYPHOON_RESET_TIMEOUT_SLEEP (6 * HZ) +#define TYPHOON_RESET_TIMEOUT_NOSLEEP ((6 * 1000000) / TYPHOON_UDELAY) +#define TYPHOON_WAIT_TIMEOUT ((1000000 / 2) / TYPHOON_UDELAY) + +#if defined(NETIF_F_TSO) +#define skb_tso_size(x) (skb_shinfo(x)->gso_size) +#define TSO_NUM_DESCRIPTORS 2 +#define TSO_OFFLOAD_ON TYPHOON_OFFLOAD_TCP_SEGMENT +#else +#define NETIF_F_TSO 0 +#define skb_tso_size(x) 0 +#define TSO_NUM_DESCRIPTORS 0 +#define TSO_OFFLOAD_ON 0 +#endif + +static inline void +typhoon_inc_index(u32 *index, const int count, const int num_entries) +{ + /* Increment a ring index -- we can use this for all rings execept + * the Rx rings, as they use different size descriptors + * otherwise, everything is the same size as a cmd_desc + */ + *index += count * sizeof(struct cmd_desc); + *index %= num_entries * sizeof(struct cmd_desc); +} + +static inline void +typhoon_inc_cmd_index(u32 *index, const int count) +{ + typhoon_inc_index(index, count, COMMAND_ENTRIES); +} + +static inline void +typhoon_inc_resp_index(u32 *index, const int count) +{ + typhoon_inc_index(index, count, RESPONSE_ENTRIES); +} + +static inline void +typhoon_inc_rxfree_index(u32 *index, const int count) +{ + typhoon_inc_index(index, count, RXFREE_ENTRIES); +} + +static inline void +typhoon_inc_tx_index(u32 *index, const int count) +{ + /* if we start using the Hi Tx ring, this needs updateing */ + typhoon_inc_index(index, count, TXLO_ENTRIES); +} + +static inline void +typhoon_inc_rx_index(u32 *index, const int count) +{ + /* sizeof(struct rx_desc) != sizeof(struct cmd_desc) */ + *index += count * sizeof(struct rx_desc); + *index %= RX_ENTRIES * sizeof(struct rx_desc); +} + +static int +typhoon_reset(void __iomem *ioaddr, int wait_type) +{ + int i, err = 0; + int timeout; + + if(wait_type == WaitNoSleep) + timeout = TYPHOON_RESET_TIMEOUT_NOSLEEP; + else + timeout = TYPHOON_RESET_TIMEOUT_SLEEP; + + iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK); + iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_STATUS); + + iowrite32(TYPHOON_RESET_ALL, ioaddr + TYPHOON_REG_SOFT_RESET); + typhoon_post_pci_writes(ioaddr); + udelay(1); + iowrite32(TYPHOON_RESET_NONE, ioaddr + TYPHOON_REG_SOFT_RESET); + + if(wait_type != NoWait) { + for(i = 0; i < timeout; i++) { + if(ioread32(ioaddr + TYPHOON_REG_STATUS) == + TYPHOON_STATUS_WAITING_FOR_HOST) + goto out; + + if(wait_type == WaitSleep) + schedule_timeout_uninterruptible(1); + else + udelay(TYPHOON_UDELAY); + } + + err = -ETIMEDOUT; + } + +out: + iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK); + iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_STATUS); + + /* The 3XP seems to need a little extra time to complete the load + * of the sleep image before we can reliably boot it. Failure to + * do this occasionally results in a hung adapter after boot in + * typhoon_init_one() while trying to read the MAC address or + * putting the card to sleep. 3Com's driver waits 5ms, but + * that seems to be overkill. However, if we can sleep, we might + * as well give it that much time. Otherwise, we'll give it 500us, + * which should be enough (I've see it work well at 100us, but still + * saw occasional problems.) + */ + if(wait_type == WaitSleep) + msleep(5); + else + udelay(500); + return err; +} + +static int +typhoon_wait_status(void __iomem *ioaddr, u32 wait_value) +{ + int i, err = 0; + + for(i = 0; i < TYPHOON_WAIT_TIMEOUT; i++) { + if(ioread32(ioaddr + TYPHOON_REG_STATUS) == wait_value) + goto out; + udelay(TYPHOON_UDELAY); + } + + err = -ETIMEDOUT; + +out: + return err; +} + +static inline void +typhoon_media_status(struct net_device *dev, struct resp_desc *resp) +{ + if(resp->parm1 & TYPHOON_MEDIA_STAT_NO_LINK) + netif_carrier_off(dev); + else + netif_carrier_on(dev); +} + +static inline void +typhoon_hello(struct typhoon *tp) +{ + struct basic_ring *ring = &tp->cmdRing; + struct cmd_desc *cmd; + + /* We only get a hello request if we've not sent anything to the + * card in a long while. If the lock is held, then we're in the + * process of issuing a command, so we don't need to respond. + */ + if(spin_trylock(&tp->command_lock)) { + cmd = (struct cmd_desc *)(ring->ringBase + ring->lastWrite); + typhoon_inc_cmd_index(&ring->lastWrite, 1); + + INIT_COMMAND_NO_RESPONSE(cmd, TYPHOON_CMD_HELLO_RESP); + wmb(); + iowrite32(ring->lastWrite, tp->ioaddr + TYPHOON_REG_CMD_READY); + spin_unlock(&tp->command_lock); + } +} + +static int +typhoon_process_response(struct typhoon *tp, int resp_size, + struct resp_desc *resp_save) +{ + struct typhoon_indexes *indexes = tp->indexes; + struct resp_desc *resp; + u8 *base = tp->respRing.ringBase; + int count, len, wrap_len; + u32 cleared; + u32 ready; + + cleared = le32_to_cpu(indexes->respCleared); + ready = le32_to_cpu(indexes->respReady); + while(cleared != ready) { + resp = (struct resp_desc *)(base + cleared); + count = resp->numDesc + 1; + if(resp_save && resp->seqNo) { + if(count > resp_size) { + resp_save->flags = TYPHOON_RESP_ERROR; + goto cleanup; + } + + wrap_len = 0; + len = count * sizeof(*resp); + if(unlikely(cleared + len > RESPONSE_RING_SIZE)) { + wrap_len = cleared + len - RESPONSE_RING_SIZE; + len = RESPONSE_RING_SIZE - cleared; + } + + memcpy(resp_save, resp, len); + if(unlikely(wrap_len)) { + resp_save += len / sizeof(*resp); + memcpy(resp_save, base, wrap_len); + } + + resp_save = NULL; + } else if(resp->cmd == TYPHOON_CMD_READ_MEDIA_STATUS) { + typhoon_media_status(tp->dev, resp); + } else if(resp->cmd == TYPHOON_CMD_HELLO_RESP) { + typhoon_hello(tp); + } else { + netdev_err(tp->dev, + "dumping unexpected response 0x%04x:%d:0x%02x:0x%04x:%08x:%08x\n", + le16_to_cpu(resp->cmd), + resp->numDesc, resp->flags, + le16_to_cpu(resp->parm1), + le32_to_cpu(resp->parm2), + le32_to_cpu(resp->parm3)); + } + +cleanup: + typhoon_inc_resp_index(&cleared, count); + } + + indexes->respCleared = cpu_to_le32(cleared); + wmb(); + return resp_save == NULL; +} + +static inline int +typhoon_num_free(int lastWrite, int lastRead, int ringSize) +{ + /* this works for all descriptors but rx_desc, as they are a + * different size than the cmd_desc -- everyone else is the same + */ + lastWrite /= sizeof(struct cmd_desc); + lastRead /= sizeof(struct cmd_desc); + return (ringSize + lastRead - lastWrite - 1) % ringSize; +} + +static inline int +typhoon_num_free_cmd(struct typhoon *tp) +{ + int lastWrite = tp->cmdRing.lastWrite; + int cmdCleared = le32_to_cpu(tp->indexes->cmdCleared); + + return typhoon_num_free(lastWrite, cmdCleared, COMMAND_ENTRIES); +} + +static inline int +typhoon_num_free_resp(struct typhoon *tp) +{ + int respReady = le32_to_cpu(tp->indexes->respReady); + int respCleared = le32_to_cpu(tp->indexes->respCleared); + + return typhoon_num_free(respReady, respCleared, RESPONSE_ENTRIES); +} + +static inline int +typhoon_num_free_tx(struct transmit_ring *ring) +{ + /* if we start using the Hi Tx ring, this needs updating */ + return typhoon_num_free(ring->lastWrite, ring->lastRead, TXLO_ENTRIES); +} + +static int +typhoon_issue_command(struct typhoon *tp, int num_cmd, struct cmd_desc *cmd, + int num_resp, struct resp_desc *resp) +{ + struct typhoon_indexes *indexes = tp->indexes; + struct basic_ring *ring = &tp->cmdRing; + struct resp_desc local_resp; + int i, err = 0; + int got_resp; + int freeCmd, freeResp; + int len, wrap_len; + + spin_lock(&tp->command_lock); + + freeCmd = typhoon_num_free_cmd(tp); + freeResp = typhoon_num_free_resp(tp); + + if(freeCmd < num_cmd || freeResp < num_resp) { + netdev_err(tp->dev, "no descs for cmd, had (needed) %d (%d) cmd, %d (%d) resp\n", + freeCmd, num_cmd, freeResp, num_resp); + err = -ENOMEM; + goto out; + } + + if(cmd->flags & TYPHOON_CMD_RESPOND) { + /* If we're expecting a response, but the caller hasn't given + * us a place to put it, we'll provide one. + */ + tp->awaiting_resp = 1; + if(resp == NULL) { + resp = &local_resp; + num_resp = 1; + } + } + + wrap_len = 0; + len = num_cmd * sizeof(*cmd); + if(unlikely(ring->lastWrite + len > COMMAND_RING_SIZE)) { + wrap_len = ring->lastWrite + len - COMMAND_RING_SIZE; + len = COMMAND_RING_SIZE - ring->lastWrite; + } + + memcpy(ring->ringBase + ring->lastWrite, cmd, len); + if(unlikely(wrap_len)) { + struct cmd_desc *wrap_ptr = cmd; + wrap_ptr += len / sizeof(*cmd); + memcpy(ring->ringBase, wrap_ptr, wrap_len); + } + + typhoon_inc_cmd_index(&ring->lastWrite, num_cmd); + + /* "I feel a presence... another warrior is on the mesa." + */ + wmb(); + iowrite32(ring->lastWrite, tp->ioaddr + TYPHOON_REG_CMD_READY); + typhoon_post_pci_writes(tp->ioaddr); + + if((cmd->flags & TYPHOON_CMD_RESPOND) == 0) + goto out; + + /* Ugh. We'll be here about 8ms, spinning our thumbs, unable to + * preempt or do anything other than take interrupts. So, don't + * wait for a response unless you have to. + * + * I've thought about trying to sleep here, but we're called + * from many contexts that don't allow that. Also, given the way + * 3Com has implemented irq coalescing, we would likely timeout -- + * this has been observed in real life! + * + * The big killer is we have to wait to get stats from the card, + * though we could go to a periodic refresh of those if we don't + * mind them getting somewhat stale. The rest of the waiting + * commands occur during open/close/suspend/resume, so they aren't + * time critical. Creating SAs in the future will also have to + * wait here. + */ + got_resp = 0; + for(i = 0; i < TYPHOON_WAIT_TIMEOUT && !got_resp; i++) { + if(indexes->respCleared != indexes->respReady) + got_resp = typhoon_process_response(tp, num_resp, + resp); + udelay(TYPHOON_UDELAY); + } + + if(!got_resp) { + err = -ETIMEDOUT; + goto out; + } + + /* Collect the error response even if we don't care about the + * rest of the response + */ + if(resp->flags & TYPHOON_RESP_ERROR) + err = -EIO; + +out: + if(tp->awaiting_resp) { + tp->awaiting_resp = 0; + smp_wmb(); + + /* Ugh. If a response was added to the ring between + * the call to typhoon_process_response() and the clearing + * of tp->awaiting_resp, we could have missed the interrupt + * and it could hang in the ring an indeterminate amount of + * time. So, check for it, and interrupt ourselves if this + * is the case. + */ + if(indexes->respCleared != indexes->respReady) + iowrite32(1, tp->ioaddr + TYPHOON_REG_SELF_INTERRUPT); + } + + spin_unlock(&tp->command_lock); + return err; +} + +static inline void +typhoon_tso_fill(struct sk_buff *skb, struct transmit_ring *txRing, + u32 ring_dma) +{ + struct tcpopt_desc *tcpd; + u32 tcpd_offset = ring_dma; + + tcpd = (struct tcpopt_desc *) (txRing->ringBase + txRing->lastWrite); + tcpd_offset += txRing->lastWrite; + tcpd_offset += offsetof(struct tcpopt_desc, bytesTx); + typhoon_inc_tx_index(&txRing->lastWrite, 1); + + tcpd->flags = TYPHOON_OPT_DESC | TYPHOON_OPT_TCP_SEG; + tcpd->numDesc = 1; + tcpd->mss_flags = cpu_to_le16(skb_tso_size(skb)); + tcpd->mss_flags |= TYPHOON_TSO_FIRST | TYPHOON_TSO_LAST; + tcpd->respAddrLo = cpu_to_le32(tcpd_offset); + tcpd->bytesTx = cpu_to_le32(skb->len); + tcpd->status = 0; +} + +static netdev_tx_t +typhoon_start_tx(struct sk_buff *skb, struct net_device *dev) +{ + struct typhoon *tp = netdev_priv(dev); + struct transmit_ring *txRing; + struct tx_desc *txd, *first_txd; + dma_addr_t skb_dma; + int numDesc; + + /* we have two rings to choose from, but we only use txLo for now + * If we start using the Hi ring as well, we'll need to update + * typhoon_stop_runtime(), typhoon_interrupt(), typhoon_num_free_tx(), + * and TXHI_ENTRIES to match, as well as update the TSO code below + * to get the right DMA address + */ + txRing = &tp->txLoRing; + + /* We need one descriptor for each fragment of the sk_buff, plus the + * one for the ->data area of it. + * + * The docs say a maximum of 16 fragment descriptors per TCP option + * descriptor, then make a new packet descriptor and option descriptor + * for the next 16 fragments. The engineers say just an option + * descriptor is needed. I've tested up to 26 fragments with a single + * packet descriptor/option descriptor combo, so I use that for now. + * + * If problems develop with TSO, check this first. + */ + numDesc = skb_shinfo(skb)->nr_frags + 1; + if (skb_is_gso(skb)) + numDesc++; + + /* When checking for free space in the ring, we need to also + * account for the initial Tx descriptor, and we always must leave + * at least one descriptor unused in the ring so that it doesn't + * wrap and look empty. + * + * The only time we should loop here is when we hit the race + * between marking the queue awake and updating the cleared index. + * Just loop and it will appear. This comes from the acenic driver. + */ + while(unlikely(typhoon_num_free_tx(txRing) < (numDesc + 2))) + smp_rmb(); + + first_txd = (struct tx_desc *) (txRing->ringBase + txRing->lastWrite); + typhoon_inc_tx_index(&txRing->lastWrite, 1); + + first_txd->flags = TYPHOON_TX_DESC | TYPHOON_DESC_VALID; + first_txd->numDesc = 0; + first_txd->len = 0; + first_txd->tx_addr = (u64)((unsigned long) skb); + first_txd->processFlags = 0; + + if(skb->ip_summed == CHECKSUM_PARTIAL) { + /* The 3XP will figure out if this is UDP/TCP */ + first_txd->processFlags |= TYPHOON_TX_PF_TCP_CHKSUM; + first_txd->processFlags |= TYPHOON_TX_PF_UDP_CHKSUM; + first_txd->processFlags |= TYPHOON_TX_PF_IP_CHKSUM; + } + + if(vlan_tx_tag_present(skb)) { + first_txd->processFlags |= + TYPHOON_TX_PF_INSERT_VLAN | TYPHOON_TX_PF_VLAN_PRIORITY; + first_txd->processFlags |= + cpu_to_le32(htons(vlan_tx_tag_get(skb)) << + TYPHOON_TX_PF_VLAN_TAG_SHIFT); + } + + if (skb_is_gso(skb)) { + first_txd->processFlags |= TYPHOON_TX_PF_TCP_SEGMENT; + first_txd->numDesc++; + + typhoon_tso_fill(skb, txRing, tp->txlo_dma_addr); + } + + txd = (struct tx_desc *) (txRing->ringBase + txRing->lastWrite); + typhoon_inc_tx_index(&txRing->lastWrite, 1); + + /* No need to worry about padding packet -- the firmware pads + * it with zeros to ETH_ZLEN for us. + */ + if(skb_shinfo(skb)->nr_frags == 0) { + skb_dma = pci_map_single(tp->tx_pdev, skb->data, skb->len, + PCI_DMA_TODEVICE); + txd->flags = TYPHOON_FRAG_DESC | TYPHOON_DESC_VALID; + txd->len = cpu_to_le16(skb->len); + txd->frag.addr = cpu_to_le32(skb_dma); + txd->frag.addrHi = 0; + first_txd->numDesc++; + } else { + int i, len; + + len = skb_headlen(skb); + skb_dma = pci_map_single(tp->tx_pdev, skb->data, len, + PCI_DMA_TODEVICE); + txd->flags = TYPHOON_FRAG_DESC | TYPHOON_DESC_VALID; + txd->len = cpu_to_le16(len); + txd->frag.addr = cpu_to_le32(skb_dma); + txd->frag.addrHi = 0; + first_txd->numDesc++; + + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; + void *frag_addr; + + txd = (struct tx_desc *) (txRing->ringBase + + txRing->lastWrite); + typhoon_inc_tx_index(&txRing->lastWrite, 1); + + len = skb_frag_size(frag); + frag_addr = skb_frag_address(frag); + skb_dma = pci_map_single(tp->tx_pdev, frag_addr, len, + PCI_DMA_TODEVICE); + txd->flags = TYPHOON_FRAG_DESC | TYPHOON_DESC_VALID; + txd->len = cpu_to_le16(len); + txd->frag.addr = cpu_to_le32(skb_dma); + txd->frag.addrHi = 0; + first_txd->numDesc++; + } + } + + /* Kick the 3XP + */ + wmb(); + iowrite32(txRing->lastWrite, tp->tx_ioaddr + txRing->writeRegister); + + /* If we don't have room to put the worst case packet on the + * queue, then we must stop the queue. We need 2 extra + * descriptors -- one to prevent ring wrap, and one for the + * Tx header. + */ + numDesc = MAX_SKB_FRAGS + TSO_NUM_DESCRIPTORS + 1; + + if(typhoon_num_free_tx(txRing) < (numDesc + 2)) { + netif_stop_queue(dev); + + /* A Tx complete IRQ could have gotten between, making + * the ring free again. Only need to recheck here, since + * Tx is serialized. + */ + if(typhoon_num_free_tx(txRing) >= (numDesc + 2)) + netif_wake_queue(dev); + } + + return NETDEV_TX_OK; +} + +static void +typhoon_set_rx_mode(struct net_device *dev) +{ + struct typhoon *tp = netdev_priv(dev); + struct cmd_desc xp_cmd; + u32 mc_filter[2]; + __le16 filter; + + filter = TYPHOON_RX_FILTER_DIRECTED | TYPHOON_RX_FILTER_BROADCAST; + if(dev->flags & IFF_PROMISC) { + filter |= TYPHOON_RX_FILTER_PROMISCOUS; + } else if ((netdev_mc_count(dev) > multicast_filter_limit) || + (dev->flags & IFF_ALLMULTI)) { + /* Too many to match, or accept all multicasts. */ + filter |= TYPHOON_RX_FILTER_ALL_MCAST; + } else if (!netdev_mc_empty(dev)) { + struct netdev_hw_addr *ha; + + memset(mc_filter, 0, sizeof(mc_filter)); + netdev_for_each_mc_addr(ha, dev) { + int bit = ether_crc(ETH_ALEN, ha->addr) & 0x3f; + mc_filter[bit >> 5] |= 1 << (bit & 0x1f); + } + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, + TYPHOON_CMD_SET_MULTICAST_HASH); + xp_cmd.parm1 = TYPHOON_MCAST_HASH_SET; + xp_cmd.parm2 = cpu_to_le32(mc_filter[0]); + xp_cmd.parm3 = cpu_to_le32(mc_filter[1]); + typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + + filter |= TYPHOON_RX_FILTER_MCAST_HASH; + } + + INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_RX_FILTER); + xp_cmd.parm1 = filter; + typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); +} + +static int +typhoon_do_get_stats(struct typhoon *tp) +{ + struct net_device_stats *stats = &tp->stats; + struct net_device_stats *saved = &tp->stats_saved; + struct cmd_desc xp_cmd; + struct resp_desc xp_resp[7]; + struct stats_resp *s = (struct stats_resp *) xp_resp; + int err; + + INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_STATS); + err = typhoon_issue_command(tp, 1, &xp_cmd, 7, xp_resp); + if(err < 0) + return err; + + /* 3Com's Linux driver uses txMultipleCollisions as it's + * collisions value, but there is some other collision info as well... + * + * The extra status reported would be a good candidate for + * ethtool_ops->get_{strings,stats}() + */ + stats->tx_packets = le32_to_cpu(s->txPackets) + + saved->tx_packets; + stats->tx_bytes = le64_to_cpu(s->txBytes) + + saved->tx_bytes; + stats->tx_errors = le32_to_cpu(s->txCarrierLost) + + saved->tx_errors; + stats->tx_carrier_errors = le32_to_cpu(s->txCarrierLost) + + saved->tx_carrier_errors; + stats->collisions = le32_to_cpu(s->txMultipleCollisions) + + saved->collisions; + stats->rx_packets = le32_to_cpu(s->rxPacketsGood) + + saved->rx_packets; + stats->rx_bytes = le64_to_cpu(s->rxBytesGood) + + saved->rx_bytes; + stats->rx_fifo_errors = le32_to_cpu(s->rxFifoOverruns) + + saved->rx_fifo_errors; + stats->rx_errors = le32_to_cpu(s->rxFifoOverruns) + + le32_to_cpu(s->BadSSD) + le32_to_cpu(s->rxCrcErrors) + + saved->rx_errors; + stats->rx_crc_errors = le32_to_cpu(s->rxCrcErrors) + + saved->rx_crc_errors; + stats->rx_length_errors = le32_to_cpu(s->rxOversized) + + saved->rx_length_errors; + tp->speed = (s->linkStatus & TYPHOON_LINK_100MBPS) ? + SPEED_100 : SPEED_10; + tp->duplex = (s->linkStatus & TYPHOON_LINK_FULL_DUPLEX) ? + DUPLEX_FULL : DUPLEX_HALF; + + return 0; +} + +static struct net_device_stats * +typhoon_get_stats(struct net_device *dev) +{ + struct typhoon *tp = netdev_priv(dev); + struct net_device_stats *stats = &tp->stats; + struct net_device_stats *saved = &tp->stats_saved; + + smp_rmb(); + if(tp->card_state == Sleeping) + return saved; + + if(typhoon_do_get_stats(tp) < 0) { + netdev_err(dev, "error getting stats\n"); + return saved; + } + + return stats; +} + +static int +typhoon_set_mac_address(struct net_device *dev, void *addr) +{ + struct sockaddr *saddr = (struct sockaddr *) addr; + + if(netif_running(dev)) + return -EBUSY; + + memcpy(dev->dev_addr, saddr->sa_data, dev->addr_len); + return 0; +} + +static void +typhoon_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) +{ + struct typhoon *tp = netdev_priv(dev); + struct pci_dev *pci_dev = tp->pdev; + struct cmd_desc xp_cmd; + struct resp_desc xp_resp[3]; + + smp_rmb(); + if(tp->card_state == Sleeping) { + strcpy(info->fw_version, "Sleep image"); + } else { + INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_VERSIONS); + if(typhoon_issue_command(tp, 1, &xp_cmd, 3, xp_resp) < 0) { + strcpy(info->fw_version, "Unknown runtime"); + } else { + u32 sleep_ver = le32_to_cpu(xp_resp[0].parm2); + snprintf(info->fw_version, 32, "%02x.%03x.%03x", + sleep_ver >> 24, (sleep_ver >> 12) & 0xfff, + sleep_ver & 0xfff); + } + } + + strcpy(info->driver, KBUILD_MODNAME); + strcpy(info->bus_info, pci_name(pci_dev)); +} + +static int +typhoon_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct typhoon *tp = netdev_priv(dev); + + cmd->supported = SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | + SUPPORTED_Autoneg; + + switch (tp->xcvr_select) { + case TYPHOON_XCVR_10HALF: + cmd->advertising = ADVERTISED_10baseT_Half; + break; + case TYPHOON_XCVR_10FULL: + cmd->advertising = ADVERTISED_10baseT_Full; + break; + case TYPHOON_XCVR_100HALF: + cmd->advertising = ADVERTISED_100baseT_Half; + break; + case TYPHOON_XCVR_100FULL: + cmd->advertising = ADVERTISED_100baseT_Full; + break; + case TYPHOON_XCVR_AUTONEG: + cmd->advertising = ADVERTISED_10baseT_Half | + ADVERTISED_10baseT_Full | + ADVERTISED_100baseT_Half | + ADVERTISED_100baseT_Full | + ADVERTISED_Autoneg; + break; + } + + if(tp->capabilities & TYPHOON_FIBER) { + cmd->supported |= SUPPORTED_FIBRE; + cmd->advertising |= ADVERTISED_FIBRE; + cmd->port = PORT_FIBRE; + } else { + cmd->supported |= SUPPORTED_10baseT_Half | + SUPPORTED_10baseT_Full | + SUPPORTED_TP; + cmd->advertising |= ADVERTISED_TP; + cmd->port = PORT_TP; + } + + /* need to get stats to make these link speed/duplex valid */ + typhoon_do_get_stats(tp); + ethtool_cmd_speed_set(cmd, tp->speed); + cmd->duplex = tp->duplex; + cmd->phy_address = 0; + cmd->transceiver = XCVR_INTERNAL; + if(tp->xcvr_select == TYPHOON_XCVR_AUTONEG) + cmd->autoneg = AUTONEG_ENABLE; + else + cmd->autoneg = AUTONEG_DISABLE; + cmd->maxtxpkt = 1; + cmd->maxrxpkt = 1; + + return 0; +} + +static int +typhoon_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct typhoon *tp = netdev_priv(dev); + u32 speed = ethtool_cmd_speed(cmd); + struct cmd_desc xp_cmd; + __le16 xcvr; + int err; + + err = -EINVAL; + if (cmd->autoneg == AUTONEG_ENABLE) { + xcvr = TYPHOON_XCVR_AUTONEG; + } else { + if (cmd->duplex == DUPLEX_HALF) { + if (speed == SPEED_10) + xcvr = TYPHOON_XCVR_10HALF; + else if (speed == SPEED_100) + xcvr = TYPHOON_XCVR_100HALF; + else + goto out; + } else if (cmd->duplex == DUPLEX_FULL) { + if (speed == SPEED_10) + xcvr = TYPHOON_XCVR_10FULL; + else if (speed == SPEED_100) + xcvr = TYPHOON_XCVR_100FULL; + else + goto out; + } else + goto out; + } + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_XCVR_SELECT); + xp_cmd.parm1 = xcvr; + err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + if(err < 0) + goto out; + + tp->xcvr_select = xcvr; + if(cmd->autoneg == AUTONEG_ENABLE) { + tp->speed = 0xff; /* invalid */ + tp->duplex = 0xff; /* invalid */ + } else { + tp->speed = speed; + tp->duplex = cmd->duplex; + } + +out: + return err; +} + +static void +typhoon_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) +{ + struct typhoon *tp = netdev_priv(dev); + + wol->supported = WAKE_PHY | WAKE_MAGIC; + wol->wolopts = 0; + if(tp->wol_events & TYPHOON_WAKE_LINK_EVENT) + wol->wolopts |= WAKE_PHY; + if(tp->wol_events & TYPHOON_WAKE_MAGIC_PKT) + wol->wolopts |= WAKE_MAGIC; + memset(&wol->sopass, 0, sizeof(wol->sopass)); +} + +static int +typhoon_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) +{ + struct typhoon *tp = netdev_priv(dev); + + if(wol->wolopts & ~(WAKE_PHY | WAKE_MAGIC)) + return -EINVAL; + + tp->wol_events = 0; + if(wol->wolopts & WAKE_PHY) + tp->wol_events |= TYPHOON_WAKE_LINK_EVENT; + if(wol->wolopts & WAKE_MAGIC) + tp->wol_events |= TYPHOON_WAKE_MAGIC_PKT; + + return 0; +} + +static void +typhoon_get_ringparam(struct net_device *dev, struct ethtool_ringparam *ering) +{ + ering->rx_max_pending = RXENT_ENTRIES; + ering->tx_max_pending = TXLO_ENTRIES - 1; + + ering->rx_pending = RXENT_ENTRIES; + ering->tx_pending = TXLO_ENTRIES - 1; +} + +static const struct ethtool_ops typhoon_ethtool_ops = { + .get_settings = typhoon_get_settings, + .set_settings = typhoon_set_settings, + .get_drvinfo = typhoon_get_drvinfo, + .get_wol = typhoon_get_wol, + .set_wol = typhoon_set_wol, + .get_link = ethtool_op_get_link, + .get_ringparam = typhoon_get_ringparam, +}; + +static int +typhoon_wait_interrupt(void __iomem *ioaddr) +{ + int i, err = 0; + + for(i = 0; i < TYPHOON_WAIT_TIMEOUT; i++) { + if(ioread32(ioaddr + TYPHOON_REG_INTR_STATUS) & + TYPHOON_INTR_BOOTCMD) + goto out; + udelay(TYPHOON_UDELAY); + } + + err = -ETIMEDOUT; + +out: + iowrite32(TYPHOON_INTR_BOOTCMD, ioaddr + TYPHOON_REG_INTR_STATUS); + return err; +} + +#define shared_offset(x) offsetof(struct typhoon_shared, x) + +static void +typhoon_init_interface(struct typhoon *tp) +{ + struct typhoon_interface *iface = &tp->shared->iface; + dma_addr_t shared_dma; + + memset(tp->shared, 0, sizeof(struct typhoon_shared)); + + /* The *Hi members of iface are all init'd to zero by the memset(). + */ + shared_dma = tp->shared_dma + shared_offset(indexes); + iface->ringIndex = cpu_to_le32(shared_dma); + + shared_dma = tp->shared_dma + shared_offset(txLo); + iface->txLoAddr = cpu_to_le32(shared_dma); + iface->txLoSize = cpu_to_le32(TXLO_ENTRIES * sizeof(struct tx_desc)); + + shared_dma = tp->shared_dma + shared_offset(txHi); + iface->txHiAddr = cpu_to_le32(shared_dma); + iface->txHiSize = cpu_to_le32(TXHI_ENTRIES * sizeof(struct tx_desc)); + + shared_dma = tp->shared_dma + shared_offset(rxBuff); + iface->rxBuffAddr = cpu_to_le32(shared_dma); + iface->rxBuffSize = cpu_to_le32(RXFREE_ENTRIES * + sizeof(struct rx_free)); + + shared_dma = tp->shared_dma + shared_offset(rxLo); + iface->rxLoAddr = cpu_to_le32(shared_dma); + iface->rxLoSize = cpu_to_le32(RX_ENTRIES * sizeof(struct rx_desc)); + + shared_dma = tp->shared_dma + shared_offset(rxHi); + iface->rxHiAddr = cpu_to_le32(shared_dma); + iface->rxHiSize = cpu_to_le32(RX_ENTRIES * sizeof(struct rx_desc)); + + shared_dma = tp->shared_dma + shared_offset(cmd); + iface->cmdAddr = cpu_to_le32(shared_dma); + iface->cmdSize = cpu_to_le32(COMMAND_RING_SIZE); + + shared_dma = tp->shared_dma + shared_offset(resp); + iface->respAddr = cpu_to_le32(shared_dma); + iface->respSize = cpu_to_le32(RESPONSE_RING_SIZE); + + shared_dma = tp->shared_dma + shared_offset(zeroWord); + iface->zeroAddr = cpu_to_le32(shared_dma); + + tp->indexes = &tp->shared->indexes; + tp->txLoRing.ringBase = (u8 *) tp->shared->txLo; + tp->txHiRing.ringBase = (u8 *) tp->shared->txHi; + tp->rxLoRing.ringBase = (u8 *) tp->shared->rxLo; + tp->rxHiRing.ringBase = (u8 *) tp->shared->rxHi; + tp->rxBuffRing.ringBase = (u8 *) tp->shared->rxBuff; + tp->cmdRing.ringBase = (u8 *) tp->shared->cmd; + tp->respRing.ringBase = (u8 *) tp->shared->resp; + + tp->txLoRing.writeRegister = TYPHOON_REG_TX_LO_READY; + tp->txHiRing.writeRegister = TYPHOON_REG_TX_HI_READY; + + tp->txlo_dma_addr = le32_to_cpu(iface->txLoAddr); + tp->card_state = Sleeping; + + tp->offload = TYPHOON_OFFLOAD_IP_CHKSUM | TYPHOON_OFFLOAD_TCP_CHKSUM; + tp->offload |= TYPHOON_OFFLOAD_UDP_CHKSUM | TSO_OFFLOAD_ON; + tp->offload |= TYPHOON_OFFLOAD_VLAN; + + spin_lock_init(&tp->command_lock); + + /* Force the writes to the shared memory area out before continuing. */ + wmb(); +} + +static void +typhoon_init_rings(struct typhoon *tp) +{ + memset(tp->indexes, 0, sizeof(struct typhoon_indexes)); + + tp->txLoRing.lastWrite = 0; + tp->txHiRing.lastWrite = 0; + tp->rxLoRing.lastWrite = 0; + tp->rxHiRing.lastWrite = 0; + tp->rxBuffRing.lastWrite = 0; + tp->cmdRing.lastWrite = 0; + tp->respRing.lastWrite = 0; + + tp->txLoRing.lastRead = 0; + tp->txHiRing.lastRead = 0; +} + +static const struct firmware *typhoon_fw; + +static int +typhoon_request_firmware(struct typhoon *tp) +{ + const struct typhoon_file_header *fHdr; + const struct typhoon_section_header *sHdr; + const u8 *image_data; + u32 numSections; + u32 section_len; + u32 remaining; + int err; + + if (typhoon_fw) + return 0; + + err = request_firmware(&typhoon_fw, FIRMWARE_NAME, &tp->pdev->dev); + if (err) { + netdev_err(tp->dev, "Failed to load firmware \"%s\"\n", + FIRMWARE_NAME); + return err; + } + + image_data = (u8 *) typhoon_fw->data; + remaining = typhoon_fw->size; + if (remaining < sizeof(struct typhoon_file_header)) + goto invalid_fw; + + fHdr = (struct typhoon_file_header *) image_data; + if (memcmp(fHdr->tag, "TYPHOON", 8)) + goto invalid_fw; + + numSections = le32_to_cpu(fHdr->numSections); + image_data += sizeof(struct typhoon_file_header); + remaining -= sizeof(struct typhoon_file_header); + + while (numSections--) { + if (remaining < sizeof(struct typhoon_section_header)) + goto invalid_fw; + + sHdr = (struct typhoon_section_header *) image_data; + image_data += sizeof(struct typhoon_section_header); + section_len = le32_to_cpu(sHdr->len); + + if (remaining < section_len) + goto invalid_fw; + + image_data += section_len; + remaining -= section_len; + } + + return 0; + +invalid_fw: + netdev_err(tp->dev, "Invalid firmware image\n"); + release_firmware(typhoon_fw); + typhoon_fw = NULL; + return -EINVAL; +} + +static int +typhoon_download_firmware(struct typhoon *tp) +{ + void __iomem *ioaddr = tp->ioaddr; + struct pci_dev *pdev = tp->pdev; + const struct typhoon_file_header *fHdr; + const struct typhoon_section_header *sHdr; + const u8 *image_data; + void *dpage; + dma_addr_t dpage_dma; + __sum16 csum; + u32 irqEnabled; + u32 irqMasked; + u32 numSections; + u32 section_len; + u32 len; + u32 load_addr; + u32 hmac; + int i; + int err; + + image_data = (u8 *) typhoon_fw->data; + fHdr = (struct typhoon_file_header *) image_data; + + /* Cannot just map the firmware image using pci_map_single() as + * the firmware is vmalloc()'d and may not be physically contiguous, + * so we allocate some consistent memory to copy the sections into. + */ + err = -ENOMEM; + dpage = pci_alloc_consistent(pdev, PAGE_SIZE, &dpage_dma); + if(!dpage) { + netdev_err(tp->dev, "no DMA mem for firmware\n"); + goto err_out; + } + + irqEnabled = ioread32(ioaddr + TYPHOON_REG_INTR_ENABLE); + iowrite32(irqEnabled | TYPHOON_INTR_BOOTCMD, + ioaddr + TYPHOON_REG_INTR_ENABLE); + irqMasked = ioread32(ioaddr + TYPHOON_REG_INTR_MASK); + iowrite32(irqMasked | TYPHOON_INTR_BOOTCMD, + ioaddr + TYPHOON_REG_INTR_MASK); + + err = -ETIMEDOUT; + if(typhoon_wait_status(ioaddr, TYPHOON_STATUS_WAITING_FOR_HOST) < 0) { + netdev_err(tp->dev, "card ready timeout\n"); + goto err_out_irq; + } + + numSections = le32_to_cpu(fHdr->numSections); + load_addr = le32_to_cpu(fHdr->startAddr); + + iowrite32(TYPHOON_INTR_BOOTCMD, ioaddr + TYPHOON_REG_INTR_STATUS); + iowrite32(load_addr, ioaddr + TYPHOON_REG_DOWNLOAD_BOOT_ADDR); + hmac = le32_to_cpu(fHdr->hmacDigest[0]); + iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_0); + hmac = le32_to_cpu(fHdr->hmacDigest[1]); + iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_1); + hmac = le32_to_cpu(fHdr->hmacDigest[2]); + iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_2); + hmac = le32_to_cpu(fHdr->hmacDigest[3]); + iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_3); + hmac = le32_to_cpu(fHdr->hmacDigest[4]); + iowrite32(hmac, ioaddr + TYPHOON_REG_DOWNLOAD_HMAC_4); + typhoon_post_pci_writes(ioaddr); + iowrite32(TYPHOON_BOOTCMD_RUNTIME_IMAGE, ioaddr + TYPHOON_REG_COMMAND); + + image_data += sizeof(struct typhoon_file_header); + + /* The ioread32() in typhoon_wait_interrupt() will force the + * last write to the command register to post, so + * we don't need a typhoon_post_pci_writes() after it. + */ + for(i = 0; i < numSections; i++) { + sHdr = (struct typhoon_section_header *) image_data; + image_data += sizeof(struct typhoon_section_header); + load_addr = le32_to_cpu(sHdr->startAddr); + section_len = le32_to_cpu(sHdr->len); + + while(section_len) { + len = min_t(u32, section_len, PAGE_SIZE); + + if(typhoon_wait_interrupt(ioaddr) < 0 || + ioread32(ioaddr + TYPHOON_REG_STATUS) != + TYPHOON_STATUS_WAITING_FOR_SEGMENT) { + netdev_err(tp->dev, "segment ready timeout\n"); + goto err_out_irq; + } + + /* Do an pseudo IPv4 checksum on the data -- first + * need to convert each u16 to cpu order before + * summing. Fortunately, due to the properties of + * the checksum, we can do this once, at the end. + */ + csum = csum_fold(csum_partial_copy_nocheck(image_data, + dpage, len, + 0)); + + iowrite32(len, ioaddr + TYPHOON_REG_BOOT_LENGTH); + iowrite32(le16_to_cpu((__force __le16)csum), + ioaddr + TYPHOON_REG_BOOT_CHECKSUM); + iowrite32(load_addr, + ioaddr + TYPHOON_REG_BOOT_DEST_ADDR); + iowrite32(0, ioaddr + TYPHOON_REG_BOOT_DATA_HI); + iowrite32(dpage_dma, ioaddr + TYPHOON_REG_BOOT_DATA_LO); + typhoon_post_pci_writes(ioaddr); + iowrite32(TYPHOON_BOOTCMD_SEG_AVAILABLE, + ioaddr + TYPHOON_REG_COMMAND); + + image_data += len; + load_addr += len; + section_len -= len; + } + } + + if(typhoon_wait_interrupt(ioaddr) < 0 || + ioread32(ioaddr + TYPHOON_REG_STATUS) != + TYPHOON_STATUS_WAITING_FOR_SEGMENT) { + netdev_err(tp->dev, "final segment ready timeout\n"); + goto err_out_irq; + } + + iowrite32(TYPHOON_BOOTCMD_DNLD_COMPLETE, ioaddr + TYPHOON_REG_COMMAND); + + if(typhoon_wait_status(ioaddr, TYPHOON_STATUS_WAITING_FOR_BOOT) < 0) { + netdev_err(tp->dev, "boot ready timeout, status 0x%0x\n", + ioread32(ioaddr + TYPHOON_REG_STATUS)); + goto err_out_irq; + } + + err = 0; + +err_out_irq: + iowrite32(irqMasked, ioaddr + TYPHOON_REG_INTR_MASK); + iowrite32(irqEnabled, ioaddr + TYPHOON_REG_INTR_ENABLE); + + pci_free_consistent(pdev, PAGE_SIZE, dpage, dpage_dma); + +err_out: + return err; +} + +static int +typhoon_boot_3XP(struct typhoon *tp, u32 initial_status) +{ + void __iomem *ioaddr = tp->ioaddr; + + if(typhoon_wait_status(ioaddr, initial_status) < 0) { + netdev_err(tp->dev, "boot ready timeout\n"); + goto out_timeout; + } + + iowrite32(0, ioaddr + TYPHOON_REG_BOOT_RECORD_ADDR_HI); + iowrite32(tp->shared_dma, ioaddr + TYPHOON_REG_BOOT_RECORD_ADDR_LO); + typhoon_post_pci_writes(ioaddr); + iowrite32(TYPHOON_BOOTCMD_REG_BOOT_RECORD, + ioaddr + TYPHOON_REG_COMMAND); + + if(typhoon_wait_status(ioaddr, TYPHOON_STATUS_RUNNING) < 0) { + netdev_err(tp->dev, "boot finish timeout (status 0x%x)\n", + ioread32(ioaddr + TYPHOON_REG_STATUS)); + goto out_timeout; + } + + /* Clear the Transmit and Command ready registers + */ + iowrite32(0, ioaddr + TYPHOON_REG_TX_HI_READY); + iowrite32(0, ioaddr + TYPHOON_REG_CMD_READY); + iowrite32(0, ioaddr + TYPHOON_REG_TX_LO_READY); + typhoon_post_pci_writes(ioaddr); + iowrite32(TYPHOON_BOOTCMD_BOOT, ioaddr + TYPHOON_REG_COMMAND); + + return 0; + +out_timeout: + return -ETIMEDOUT; +} + +static u32 +typhoon_clean_tx(struct typhoon *tp, struct transmit_ring *txRing, + volatile __le32 * index) +{ + u32 lastRead = txRing->lastRead; + struct tx_desc *tx; + dma_addr_t skb_dma; + int dma_len; + int type; + + while(lastRead != le32_to_cpu(*index)) { + tx = (struct tx_desc *) (txRing->ringBase + lastRead); + type = tx->flags & TYPHOON_TYPE_MASK; + + if(type == TYPHOON_TX_DESC) { + /* This tx_desc describes a packet. + */ + unsigned long ptr = tx->tx_addr; + struct sk_buff *skb = (struct sk_buff *) ptr; + dev_kfree_skb_irq(skb); + } else if(type == TYPHOON_FRAG_DESC) { + /* This tx_desc describes a memory mapping. Free it. + */ + skb_dma = (dma_addr_t) le32_to_cpu(tx->frag.addr); + dma_len = le16_to_cpu(tx->len); + pci_unmap_single(tp->pdev, skb_dma, dma_len, + PCI_DMA_TODEVICE); + } + + tx->flags = 0; + typhoon_inc_tx_index(&lastRead, 1); + } + + return lastRead; +} + +static void +typhoon_tx_complete(struct typhoon *tp, struct transmit_ring *txRing, + volatile __le32 * index) +{ + u32 lastRead; + int numDesc = MAX_SKB_FRAGS + 1; + + /* This will need changing if we start to use the Hi Tx ring. */ + lastRead = typhoon_clean_tx(tp, txRing, index); + if(netif_queue_stopped(tp->dev) && typhoon_num_free(txRing->lastWrite, + lastRead, TXLO_ENTRIES) > (numDesc + 2)) + netif_wake_queue(tp->dev); + + txRing->lastRead = lastRead; + smp_wmb(); +} + +static void +typhoon_recycle_rx_skb(struct typhoon *tp, u32 idx) +{ + struct typhoon_indexes *indexes = tp->indexes; + struct rxbuff_ent *rxb = &tp->rxbuffers[idx]; + struct basic_ring *ring = &tp->rxBuffRing; + struct rx_free *r; + + if((ring->lastWrite + sizeof(*r)) % (RXFREE_ENTRIES * sizeof(*r)) == + le32_to_cpu(indexes->rxBuffCleared)) { + /* no room in ring, just drop the skb + */ + dev_kfree_skb_any(rxb->skb); + rxb->skb = NULL; + return; + } + + r = (struct rx_free *) (ring->ringBase + ring->lastWrite); + typhoon_inc_rxfree_index(&ring->lastWrite, 1); + r->virtAddr = idx; + r->physAddr = cpu_to_le32(rxb->dma_addr); + + /* Tell the card about it */ + wmb(); + indexes->rxBuffReady = cpu_to_le32(ring->lastWrite); +} + +static int +typhoon_alloc_rx_skb(struct typhoon *tp, u32 idx) +{ + struct typhoon_indexes *indexes = tp->indexes; + struct rxbuff_ent *rxb = &tp->rxbuffers[idx]; + struct basic_ring *ring = &tp->rxBuffRing; + struct rx_free *r; + struct sk_buff *skb; + dma_addr_t dma_addr; + + rxb->skb = NULL; + + if((ring->lastWrite + sizeof(*r)) % (RXFREE_ENTRIES * sizeof(*r)) == + le32_to_cpu(indexes->rxBuffCleared)) + return -ENOMEM; + + skb = dev_alloc_skb(PKT_BUF_SZ); + if(!skb) + return -ENOMEM; + +#if 0 + /* Please, 3com, fix the firmware to allow DMA to a unaligned + * address! Pretty please? + */ + skb_reserve(skb, 2); +#endif + + skb->dev = tp->dev; + dma_addr = pci_map_single(tp->pdev, skb->data, + PKT_BUF_SZ, PCI_DMA_FROMDEVICE); + + /* Since no card does 64 bit DAC, the high bits will never + * change from zero. + */ + r = (struct rx_free *) (ring->ringBase + ring->lastWrite); + typhoon_inc_rxfree_index(&ring->lastWrite, 1); + r->virtAddr = idx; + r->physAddr = cpu_to_le32(dma_addr); + rxb->skb = skb; + rxb->dma_addr = dma_addr; + + /* Tell the card about it */ + wmb(); + indexes->rxBuffReady = cpu_to_le32(ring->lastWrite); + return 0; +} + +static int +typhoon_rx(struct typhoon *tp, struct basic_ring *rxRing, volatile __le32 * ready, + volatile __le32 * cleared, int budget) +{ + struct rx_desc *rx; + struct sk_buff *skb, *new_skb; + struct rxbuff_ent *rxb; + dma_addr_t dma_addr; + u32 local_ready; + u32 rxaddr; + int pkt_len; + u32 idx; + __le32 csum_bits; + int received; + + received = 0; + local_ready = le32_to_cpu(*ready); + rxaddr = le32_to_cpu(*cleared); + while(rxaddr != local_ready && budget > 0) { + rx = (struct rx_desc *) (rxRing->ringBase + rxaddr); + idx = rx->addr; + rxb = &tp->rxbuffers[idx]; + skb = rxb->skb; + dma_addr = rxb->dma_addr; + + typhoon_inc_rx_index(&rxaddr, 1); + + if(rx->flags & TYPHOON_RX_ERROR) { + typhoon_recycle_rx_skb(tp, idx); + continue; + } + + pkt_len = le16_to_cpu(rx->frameLen); + + if(pkt_len < rx_copybreak && + (new_skb = dev_alloc_skb(pkt_len + 2)) != NULL) { + skb_reserve(new_skb, 2); + pci_dma_sync_single_for_cpu(tp->pdev, dma_addr, + PKT_BUF_SZ, + PCI_DMA_FROMDEVICE); + skb_copy_to_linear_data(new_skb, skb->data, pkt_len); + pci_dma_sync_single_for_device(tp->pdev, dma_addr, + PKT_BUF_SZ, + PCI_DMA_FROMDEVICE); + skb_put(new_skb, pkt_len); + typhoon_recycle_rx_skb(tp, idx); + } else { + new_skb = skb; + skb_put(new_skb, pkt_len); + pci_unmap_single(tp->pdev, dma_addr, PKT_BUF_SZ, + PCI_DMA_FROMDEVICE); + typhoon_alloc_rx_skb(tp, idx); + } + new_skb->protocol = eth_type_trans(new_skb, tp->dev); + csum_bits = rx->rxStatus & (TYPHOON_RX_IP_CHK_GOOD | + TYPHOON_RX_UDP_CHK_GOOD | TYPHOON_RX_TCP_CHK_GOOD); + if(csum_bits == + (TYPHOON_RX_IP_CHK_GOOD | TYPHOON_RX_TCP_CHK_GOOD) || + csum_bits == + (TYPHOON_RX_IP_CHK_GOOD | TYPHOON_RX_UDP_CHK_GOOD)) { + new_skb->ip_summed = CHECKSUM_UNNECESSARY; + } else + skb_checksum_none_assert(new_skb); + + if (rx->rxStatus & TYPHOON_RX_VLAN) + __vlan_hwaccel_put_tag(new_skb, + ntohl(rx->vlanTag) & 0xffff); + netif_receive_skb(new_skb); + + received++; + budget--; + } + *cleared = cpu_to_le32(rxaddr); + + return received; +} + +static void +typhoon_fill_free_ring(struct typhoon *tp) +{ + u32 i; + + for(i = 0; i < RXENT_ENTRIES; i++) { + struct rxbuff_ent *rxb = &tp->rxbuffers[i]; + if(rxb->skb) + continue; + if(typhoon_alloc_rx_skb(tp, i) < 0) + break; + } +} + +static int +typhoon_poll(struct napi_struct *napi, int budget) +{ + struct typhoon *tp = container_of(napi, struct typhoon, napi); + struct typhoon_indexes *indexes = tp->indexes; + int work_done; + + rmb(); + if(!tp->awaiting_resp && indexes->respReady != indexes->respCleared) + typhoon_process_response(tp, 0, NULL); + + if(le32_to_cpu(indexes->txLoCleared) != tp->txLoRing.lastRead) + typhoon_tx_complete(tp, &tp->txLoRing, &indexes->txLoCleared); + + work_done = 0; + + if(indexes->rxHiCleared != indexes->rxHiReady) { + work_done += typhoon_rx(tp, &tp->rxHiRing, &indexes->rxHiReady, + &indexes->rxHiCleared, budget); + } + + if(indexes->rxLoCleared != indexes->rxLoReady) { + work_done += typhoon_rx(tp, &tp->rxLoRing, &indexes->rxLoReady, + &indexes->rxLoCleared, budget - work_done); + } + + if(le32_to_cpu(indexes->rxBuffCleared) == tp->rxBuffRing.lastWrite) { + /* rxBuff ring is empty, try to fill it. */ + typhoon_fill_free_ring(tp); + } + + if (work_done < budget) { + napi_complete(napi); + iowrite32(TYPHOON_INTR_NONE, + tp->ioaddr + TYPHOON_REG_INTR_MASK); + typhoon_post_pci_writes(tp->ioaddr); + } + + return work_done; +} + +static irqreturn_t +typhoon_interrupt(int irq, void *dev_instance) +{ + struct net_device *dev = dev_instance; + struct typhoon *tp = netdev_priv(dev); + void __iomem *ioaddr = tp->ioaddr; + u32 intr_status; + + intr_status = ioread32(ioaddr + TYPHOON_REG_INTR_STATUS); + if(!(intr_status & TYPHOON_INTR_HOST_INT)) + return IRQ_NONE; + + iowrite32(intr_status, ioaddr + TYPHOON_REG_INTR_STATUS); + + if (napi_schedule_prep(&tp->napi)) { + iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK); + typhoon_post_pci_writes(ioaddr); + __napi_schedule(&tp->napi); + } else { + netdev_err(dev, "Error, poll already scheduled\n"); + } + return IRQ_HANDLED; +} + +static void +typhoon_free_rx_rings(struct typhoon *tp) +{ + u32 i; + + for(i = 0; i < RXENT_ENTRIES; i++) { + struct rxbuff_ent *rxb = &tp->rxbuffers[i]; + if(rxb->skb) { + pci_unmap_single(tp->pdev, rxb->dma_addr, PKT_BUF_SZ, + PCI_DMA_FROMDEVICE); + dev_kfree_skb(rxb->skb); + rxb->skb = NULL; + } + } +} + +static int +typhoon_sleep(struct typhoon *tp, pci_power_t state, __le16 events) +{ + struct pci_dev *pdev = tp->pdev; + void __iomem *ioaddr = tp->ioaddr; + struct cmd_desc xp_cmd; + int err; + + INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_ENABLE_WAKE_EVENTS); + xp_cmd.parm1 = events; + err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + if(err < 0) { + netdev_err(tp->dev, "typhoon_sleep(): wake events cmd err %d\n", + err); + return err; + } + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_GOTO_SLEEP); + err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + if(err < 0) { + netdev_err(tp->dev, "typhoon_sleep(): sleep cmd err %d\n", err); + return err; + } + + if(typhoon_wait_status(ioaddr, TYPHOON_STATUS_SLEEPING) < 0) + return -ETIMEDOUT; + + /* Since we cannot monitor the status of the link while sleeping, + * tell the world it went away. + */ + netif_carrier_off(tp->dev); + + pci_enable_wake(tp->pdev, state, 1); + pci_disable_device(pdev); + return pci_set_power_state(pdev, state); +} + +static int +typhoon_wakeup(struct typhoon *tp, int wait_type) +{ + struct pci_dev *pdev = tp->pdev; + void __iomem *ioaddr = tp->ioaddr; + + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + + /* Post 2.x.x versions of the Sleep Image require a reset before + * we can download the Runtime Image. But let's not make users of + * the old firmware pay for the reset. + */ + iowrite32(TYPHOON_BOOTCMD_WAKEUP, ioaddr + TYPHOON_REG_COMMAND); + if(typhoon_wait_status(ioaddr, TYPHOON_STATUS_WAITING_FOR_HOST) < 0 || + (tp->capabilities & TYPHOON_WAKEUP_NEEDS_RESET)) + return typhoon_reset(ioaddr, wait_type); + + return 0; +} + +static int +typhoon_start_runtime(struct typhoon *tp) +{ + struct net_device *dev = tp->dev; + void __iomem *ioaddr = tp->ioaddr; + struct cmd_desc xp_cmd; + int err; + + typhoon_init_rings(tp); + typhoon_fill_free_ring(tp); + + err = typhoon_download_firmware(tp); + if(err < 0) { + netdev_err(tp->dev, "cannot load runtime on 3XP\n"); + goto error_out; + } + + if(typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_BOOT) < 0) { + netdev_err(tp->dev, "cannot boot 3XP\n"); + err = -EIO; + goto error_out; + } + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_MAX_PKT_SIZE); + xp_cmd.parm1 = cpu_to_le16(PKT_BUF_SZ); + err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + if(err < 0) + goto error_out; + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_MAC_ADDRESS); + xp_cmd.parm1 = cpu_to_le16(ntohs(*(__be16 *)&dev->dev_addr[0])); + xp_cmd.parm2 = cpu_to_le32(ntohl(*(__be32 *)&dev->dev_addr[2])); + err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + if(err < 0) + goto error_out; + + /* Disable IRQ coalescing -- we can reenable it when 3Com gives + * us some more information on how to control it. + */ + INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_IRQ_COALESCE_CTRL); + xp_cmd.parm1 = 0; + err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + if(err < 0) + goto error_out; + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_XCVR_SELECT); + xp_cmd.parm1 = tp->xcvr_select; + err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + if(err < 0) + goto error_out; + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_VLAN_TYPE_WRITE); + xp_cmd.parm1 = cpu_to_le16(ETH_P_8021Q); + err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + if(err < 0) + goto error_out; + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_OFFLOAD_TASKS); + xp_cmd.parm2 = tp->offload; + xp_cmd.parm3 = tp->offload; + err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + if(err < 0) + goto error_out; + + typhoon_set_rx_mode(dev); + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_TX_ENABLE); + err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + if(err < 0) + goto error_out; + + INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_RX_ENABLE); + err = typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + if(err < 0) + goto error_out; + + tp->card_state = Running; + smp_wmb(); + + iowrite32(TYPHOON_INTR_ENABLE_ALL, ioaddr + TYPHOON_REG_INTR_ENABLE); + iowrite32(TYPHOON_INTR_NONE, ioaddr + TYPHOON_REG_INTR_MASK); + typhoon_post_pci_writes(ioaddr); + + return 0; + +error_out: + typhoon_reset(ioaddr, WaitNoSleep); + typhoon_free_rx_rings(tp); + typhoon_init_rings(tp); + return err; +} + +static int +typhoon_stop_runtime(struct typhoon *tp, int wait_type) +{ + struct typhoon_indexes *indexes = tp->indexes; + struct transmit_ring *txLo = &tp->txLoRing; + void __iomem *ioaddr = tp->ioaddr; + struct cmd_desc xp_cmd; + int i; + + /* Disable interrupts early, since we can't schedule a poll + * when called with !netif_running(). This will be posted + * when we force the posting of the command. + */ + iowrite32(TYPHOON_INTR_NONE, ioaddr + TYPHOON_REG_INTR_ENABLE); + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_RX_DISABLE); + typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + + /* Wait 1/2 sec for any outstanding transmits to occur + * We'll cleanup after the reset if this times out. + */ + for(i = 0; i < TYPHOON_WAIT_TIMEOUT; i++) { + if(indexes->txLoCleared == cpu_to_le32(txLo->lastWrite)) + break; + udelay(TYPHOON_UDELAY); + } + + if(i == TYPHOON_WAIT_TIMEOUT) + netdev_err(tp->dev, "halt timed out waiting for Tx to complete\n"); + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_TX_DISABLE); + typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + + /* save the statistics so when we bring the interface up again, + * the values reported to userspace are correct. + */ + tp->card_state = Sleeping; + smp_wmb(); + typhoon_do_get_stats(tp); + memcpy(&tp->stats_saved, &tp->stats, sizeof(struct net_device_stats)); + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_HALT); + typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL); + + if(typhoon_wait_status(ioaddr, TYPHOON_STATUS_HALTED) < 0) + netdev_err(tp->dev, "timed out waiting for 3XP to halt\n"); + + if(typhoon_reset(ioaddr, wait_type) < 0) { + netdev_err(tp->dev, "unable to reset 3XP\n"); + return -ETIMEDOUT; + } + + /* cleanup any outstanding Tx packets */ + if(indexes->txLoCleared != cpu_to_le32(txLo->lastWrite)) { + indexes->txLoCleared = cpu_to_le32(txLo->lastWrite); + typhoon_clean_tx(tp, &tp->txLoRing, &indexes->txLoCleared); + } + + return 0; +} + +static void +typhoon_tx_timeout(struct net_device *dev) +{ + struct typhoon *tp = netdev_priv(dev); + + if(typhoon_reset(tp->ioaddr, WaitNoSleep) < 0) { + netdev_warn(dev, "could not reset in tx timeout\n"); + goto truly_dead; + } + + /* If we ever start using the Hi ring, it will need cleaning too */ + typhoon_clean_tx(tp, &tp->txLoRing, &tp->indexes->txLoCleared); + typhoon_free_rx_rings(tp); + + if(typhoon_start_runtime(tp) < 0) { + netdev_err(dev, "could not start runtime in tx timeout\n"); + goto truly_dead; + } + + netif_wake_queue(dev); + return; + +truly_dead: + /* Reset the hardware, and turn off carrier to avoid more timeouts */ + typhoon_reset(tp->ioaddr, NoWait); + netif_carrier_off(dev); +} + +static int +typhoon_open(struct net_device *dev) +{ + struct typhoon *tp = netdev_priv(dev); + int err; + + err = typhoon_request_firmware(tp); + if (err) + goto out; + + err = typhoon_wakeup(tp, WaitSleep); + if(err < 0) { + netdev_err(dev, "unable to wakeup device\n"); + goto out_sleep; + } + + err = request_irq(dev->irq, typhoon_interrupt, IRQF_SHARED, + dev->name, dev); + if(err < 0) + goto out_sleep; + + napi_enable(&tp->napi); + + err = typhoon_start_runtime(tp); + if(err < 0) { + napi_disable(&tp->napi); + goto out_irq; + } + + netif_start_queue(dev); + return 0; + +out_irq: + free_irq(dev->irq, dev); + +out_sleep: + if(typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_HOST) < 0) { + netdev_err(dev, "unable to reboot into sleep img\n"); + typhoon_reset(tp->ioaddr, NoWait); + goto out; + } + + if(typhoon_sleep(tp, PCI_D3hot, 0) < 0) + netdev_err(dev, "unable to go back to sleep\n"); + +out: + return err; +} + +static int +typhoon_close(struct net_device *dev) +{ + struct typhoon *tp = netdev_priv(dev); + + netif_stop_queue(dev); + napi_disable(&tp->napi); + + if(typhoon_stop_runtime(tp, WaitSleep) < 0) + netdev_err(dev, "unable to stop runtime\n"); + + /* Make sure there is no irq handler running on a different CPU. */ + free_irq(dev->irq, dev); + + typhoon_free_rx_rings(tp); + typhoon_init_rings(tp); + + if(typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_HOST) < 0) + netdev_err(dev, "unable to boot sleep image\n"); + + if(typhoon_sleep(tp, PCI_D3hot, 0) < 0) + netdev_err(dev, "unable to put card to sleep\n"); + + return 0; +} + +#ifdef CONFIG_PM +static int +typhoon_resume(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct typhoon *tp = netdev_priv(dev); + + /* If we're down, resume when we are upped. + */ + if(!netif_running(dev)) + return 0; + + if(typhoon_wakeup(tp, WaitNoSleep) < 0) { + netdev_err(dev, "critical: could not wake up in resume\n"); + goto reset; + } + + if(typhoon_start_runtime(tp) < 0) { + netdev_err(dev, "critical: could not start runtime in resume\n"); + goto reset; + } + + netif_device_attach(dev); + return 0; + +reset: + typhoon_reset(tp->ioaddr, NoWait); + return -EBUSY; +} + +static int +typhoon_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct typhoon *tp = netdev_priv(dev); + struct cmd_desc xp_cmd; + + /* If we're down, we're already suspended. + */ + if(!netif_running(dev)) + return 0; + + /* TYPHOON_OFFLOAD_VLAN is always on now, so this doesn't work */ + if(tp->wol_events & TYPHOON_WAKE_MAGIC_PKT) + netdev_warn(dev, "cannot do WAKE_MAGIC with VLAN offloading\n"); + + netif_device_detach(dev); + + if(typhoon_stop_runtime(tp, WaitNoSleep) < 0) { + netdev_err(dev, "unable to stop runtime\n"); + goto need_resume; + } + + typhoon_free_rx_rings(tp); + typhoon_init_rings(tp); + + if(typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_HOST) < 0) { + netdev_err(dev, "unable to boot sleep image\n"); + goto need_resume; + } + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_MAC_ADDRESS); + xp_cmd.parm1 = cpu_to_le16(ntohs(*(__be16 *)&dev->dev_addr[0])); + xp_cmd.parm2 = cpu_to_le32(ntohl(*(__be32 *)&dev->dev_addr[2])); + if(typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL) < 0) { + netdev_err(dev, "unable to set mac address in suspend\n"); + goto need_resume; + } + + INIT_COMMAND_NO_RESPONSE(&xp_cmd, TYPHOON_CMD_SET_RX_FILTER); + xp_cmd.parm1 = TYPHOON_RX_FILTER_DIRECTED | TYPHOON_RX_FILTER_BROADCAST; + if(typhoon_issue_command(tp, 1, &xp_cmd, 0, NULL) < 0) { + netdev_err(dev, "unable to set rx filter in suspend\n"); + goto need_resume; + } + + if(typhoon_sleep(tp, pci_choose_state(pdev, state), tp->wol_events) < 0) { + netdev_err(dev, "unable to put card to sleep\n"); + goto need_resume; + } + + return 0; + +need_resume: + typhoon_resume(pdev); + return -EBUSY; +} +#endif + +static int __devinit +typhoon_test_mmio(struct pci_dev *pdev) +{ + void __iomem *ioaddr = pci_iomap(pdev, 1, 128); + int mode = 0; + u32 val; + + if(!ioaddr) + goto out; + + if(ioread32(ioaddr + TYPHOON_REG_STATUS) != + TYPHOON_STATUS_WAITING_FOR_HOST) + goto out_unmap; + + iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK); + iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_STATUS); + iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_ENABLE); + + /* Ok, see if we can change our interrupt status register by + * sending ourselves an interrupt. If so, then MMIO works. + * The 50usec delay is arbitrary -- it could probably be smaller. + */ + val = ioread32(ioaddr + TYPHOON_REG_INTR_STATUS); + if((val & TYPHOON_INTR_SELF) == 0) { + iowrite32(1, ioaddr + TYPHOON_REG_SELF_INTERRUPT); + ioread32(ioaddr + TYPHOON_REG_INTR_STATUS); + udelay(50); + val = ioread32(ioaddr + TYPHOON_REG_INTR_STATUS); + if(val & TYPHOON_INTR_SELF) + mode = 1; + } + + iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_MASK); + iowrite32(TYPHOON_INTR_ALL, ioaddr + TYPHOON_REG_INTR_STATUS); + iowrite32(TYPHOON_INTR_NONE, ioaddr + TYPHOON_REG_INTR_ENABLE); + ioread32(ioaddr + TYPHOON_REG_INTR_STATUS); + +out_unmap: + pci_iounmap(pdev, ioaddr); + +out: + if(!mode) + pr_info("%s: falling back to port IO\n", pci_name(pdev)); + return mode; +} + +static const struct net_device_ops typhoon_netdev_ops = { + .ndo_open = typhoon_open, + .ndo_stop = typhoon_close, + .ndo_start_xmit = typhoon_start_tx, + .ndo_set_rx_mode = typhoon_set_rx_mode, + .ndo_tx_timeout = typhoon_tx_timeout, + .ndo_get_stats = typhoon_get_stats, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = typhoon_set_mac_address, + .ndo_change_mtu = eth_change_mtu, +}; + +static int __devinit +typhoon_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct net_device *dev; + struct typhoon *tp; + int card_id = (int) ent->driver_data; + void __iomem *ioaddr; + void *shared; + dma_addr_t shared_dma; + struct cmd_desc xp_cmd; + struct resp_desc xp_resp[3]; + int err = 0; + const char *err_msg; + + dev = alloc_etherdev(sizeof(*tp)); + if(dev == NULL) { + err_msg = "unable to alloc new net device"; + err = -ENOMEM; + goto error_out; + } + SET_NETDEV_DEV(dev, &pdev->dev); + + err = pci_enable_device(pdev); + if(err < 0) { + err_msg = "unable to enable device"; + goto error_out_dev; + } + + err = pci_set_mwi(pdev); + if(err < 0) { + err_msg = "unable to set MWI"; + goto error_out_disable; + } + + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + if(err < 0) { + err_msg = "No usable DMA configuration"; + goto error_out_mwi; + } + + /* sanity checks on IO and MMIO BARs + */ + if(!(pci_resource_flags(pdev, 0) & IORESOURCE_IO)) { + err_msg = "region #1 not a PCI IO resource, aborting"; + err = -ENODEV; + goto error_out_mwi; + } + if(pci_resource_len(pdev, 0) < 128) { + err_msg = "Invalid PCI IO region size, aborting"; + err = -ENODEV; + goto error_out_mwi; + } + if(!(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) { + err_msg = "region #1 not a PCI MMIO resource, aborting"; + err = -ENODEV; + goto error_out_mwi; + } + if(pci_resource_len(pdev, 1) < 128) { + err_msg = "Invalid PCI MMIO region size, aborting"; + err = -ENODEV; + goto error_out_mwi; + } + + err = pci_request_regions(pdev, KBUILD_MODNAME); + if(err < 0) { + err_msg = "could not request regions"; + goto error_out_mwi; + } + + /* map our registers + */ + if(use_mmio != 0 && use_mmio != 1) + use_mmio = typhoon_test_mmio(pdev); + + ioaddr = pci_iomap(pdev, use_mmio, 128); + if (!ioaddr) { + err_msg = "cannot remap registers, aborting"; + err = -EIO; + goto error_out_regions; + } + + /* allocate pci dma space for rx and tx descriptor rings + */ + shared = pci_alloc_consistent(pdev, sizeof(struct typhoon_shared), + &shared_dma); + if(!shared) { + err_msg = "could not allocate DMA memory"; + err = -ENOMEM; + goto error_out_remap; + } + + dev->irq = pdev->irq; + tp = netdev_priv(dev); + tp->shared = shared; + tp->shared_dma = shared_dma; + tp->pdev = pdev; + tp->tx_pdev = pdev; + tp->ioaddr = ioaddr; + tp->tx_ioaddr = ioaddr; + tp->dev = dev; + + /* Init sequence: + * 1) Reset the adapter to clear any bad juju + * 2) Reload the sleep image + * 3) Boot the sleep image + * 4) Get the hardware address. + * 5) Put the card to sleep. + */ + if (typhoon_reset(ioaddr, WaitSleep) < 0) { + err_msg = "could not reset 3XP"; + err = -EIO; + goto error_out_dma; + } + + /* Now that we've reset the 3XP and are sure it's not going to + * write all over memory, enable bus mastering, and save our + * state for resuming after a suspend. + */ + pci_set_master(pdev); + pci_save_state(pdev); + + typhoon_init_interface(tp); + typhoon_init_rings(tp); + + if(typhoon_boot_3XP(tp, TYPHOON_STATUS_WAITING_FOR_HOST) < 0) { + err_msg = "cannot boot 3XP sleep image"; + err = -EIO; + goto error_out_reset; + } + + INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_MAC_ADDRESS); + if(typhoon_issue_command(tp, 1, &xp_cmd, 1, xp_resp) < 0) { + err_msg = "cannot read MAC address"; + err = -EIO; + goto error_out_reset; + } + + *(__be16 *)&dev->dev_addr[0] = htons(le16_to_cpu(xp_resp[0].parm1)); + *(__be32 *)&dev->dev_addr[2] = htonl(le32_to_cpu(xp_resp[0].parm2)); + + if(!is_valid_ether_addr(dev->dev_addr)) { + err_msg = "Could not obtain valid ethernet address, aborting"; + goto error_out_reset; + } + + /* Read the Sleep Image version last, so the response is valid + * later when we print out the version reported. + */ + INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_VERSIONS); + if(typhoon_issue_command(tp, 1, &xp_cmd, 3, xp_resp) < 0) { + err_msg = "Could not get Sleep Image version"; + goto error_out_reset; + } + + tp->capabilities = typhoon_card_info[card_id].capabilities; + tp->xcvr_select = TYPHOON_XCVR_AUTONEG; + + /* Typhoon 1.0 Sleep Images return one response descriptor to the + * READ_VERSIONS command. Those versions are OK after waking up + * from sleep without needing a reset. Typhoon 1.1+ Sleep Images + * seem to need a little extra help to get started. Since we don't + * know how to nudge it along, just kick it. + */ + if(xp_resp[0].numDesc != 0) + tp->capabilities |= TYPHOON_WAKEUP_NEEDS_RESET; + + if(typhoon_sleep(tp, PCI_D3hot, 0) < 0) { + err_msg = "cannot put adapter to sleep"; + err = -EIO; + goto error_out_reset; + } + + /* The chip-specific entries in the device structure. */ + dev->netdev_ops = &typhoon_netdev_ops; + netif_napi_add(dev, &tp->napi, typhoon_poll, 16); + dev->watchdog_timeo = TX_TIMEOUT; + + SET_ETHTOOL_OPS(dev, &typhoon_ethtool_ops); + + /* We can handle scatter gather, up to 16 entries, and + * we can do IP checksumming (only version 4, doh...) + * + * There's no way to turn off the RX VLAN offloading and stripping + * on the current 3XP firmware -- it does not respect the offload + * settings -- so we only allow the user to toggle the TX processing. + */ + dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO | + NETIF_F_HW_VLAN_TX; + dev->features = dev->hw_features | + NETIF_F_HW_VLAN_RX | NETIF_F_RXCSUM; + + if(register_netdev(dev) < 0) { + err_msg = "unable to register netdev"; + goto error_out_reset; + } + + pci_set_drvdata(pdev, dev); + + netdev_info(dev, "%s at %s 0x%llx, %pM\n", + typhoon_card_info[card_id].name, + use_mmio ? "MMIO" : "IO", + (unsigned long long)pci_resource_start(pdev, use_mmio), + dev->dev_addr); + + /* xp_resp still contains the response to the READ_VERSIONS command. + * For debugging, let the user know what version he has. + */ + if(xp_resp[0].numDesc == 0) { + /* This is the Typhoon 1.0 type Sleep Image, last 16 bits + * of version is Month/Day of build. + */ + u16 monthday = le32_to_cpu(xp_resp[0].parm2) & 0xffff; + netdev_info(dev, "Typhoon 1.0 Sleep Image built %02u/%02u/2000\n", + monthday >> 8, monthday & 0xff); + } else if(xp_resp[0].numDesc == 2) { + /* This is the Typhoon 1.1+ type Sleep Image + */ + u32 sleep_ver = le32_to_cpu(xp_resp[0].parm2); + u8 *ver_string = (u8 *) &xp_resp[1]; + ver_string[25] = 0; + netdev_info(dev, "Typhoon 1.1+ Sleep Image version %02x.%03x.%03x %s\n", + sleep_ver >> 24, (sleep_ver >> 12) & 0xfff, + sleep_ver & 0xfff, ver_string); + } else { + netdev_warn(dev, "Unknown Sleep Image version (%u:%04x)\n", + xp_resp[0].numDesc, le32_to_cpu(xp_resp[0].parm2)); + } + + return 0; + +error_out_reset: + typhoon_reset(ioaddr, NoWait); + +error_out_dma: + pci_free_consistent(pdev, sizeof(struct typhoon_shared), + shared, shared_dma); +error_out_remap: + pci_iounmap(pdev, ioaddr); +error_out_regions: + pci_release_regions(pdev); +error_out_mwi: + pci_clear_mwi(pdev); +error_out_disable: + pci_disable_device(pdev); +error_out_dev: + free_netdev(dev); +error_out: + pr_err("%s: %s\n", pci_name(pdev), err_msg); + return err; +} + +static void __devexit +typhoon_remove_one(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct typhoon *tp = netdev_priv(dev); + + unregister_netdev(dev); + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + typhoon_reset(tp->ioaddr, NoWait); + pci_iounmap(pdev, tp->ioaddr); + pci_free_consistent(pdev, sizeof(struct typhoon_shared), + tp->shared, tp->shared_dma); + pci_release_regions(pdev); + pci_clear_mwi(pdev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); + free_netdev(dev); +} + +static struct pci_driver typhoon_driver = { + .name = KBUILD_MODNAME, + .id_table = typhoon_pci_tbl, + .probe = typhoon_init_one, + .remove = __devexit_p(typhoon_remove_one), +#ifdef CONFIG_PM + .suspend = typhoon_suspend, + .resume = typhoon_resume, +#endif +}; + +static int __init +typhoon_init(void) +{ + return pci_register_driver(&typhoon_driver); +} + +static void __exit +typhoon_cleanup(void) +{ + if (typhoon_fw) + release_firmware(typhoon_fw); + pci_unregister_driver(&typhoon_driver); +} + +module_init(typhoon_init); +module_exit(typhoon_cleanup); |