| /* hamachi.c: A Packet Engines GNIC-II Gigabit Ethernet driver for Linux. */ |
| /* |
| Written 1998-2000 by Donald Becker. |
| Updates 2000 by Keith Underwood. |
| |
| 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. |
| |
| The author may be reached as becker@scyld.com, or C/O |
| Scyld Computing Corporation |
| 410 Severn Ave., Suite 210 |
| Annapolis MD 21403 |
| |
| This driver is for the Packet Engines GNIC-II PCI Gigabit Ethernet |
| adapter. |
| |
| Support and updates available at |
| http://www.scyld.com/network/hamachi.html |
| [link no longer provides useful info -jgarzik] |
| or |
| http://www.parl.clemson.edu/~keithu/hamachi.html |
| |
| */ |
| |
| #define DRV_NAME "hamachi" |
| #define DRV_VERSION "2.1" |
| #define DRV_RELDATE "Sept 11, 2006" |
| |
| |
| /* A few user-configurable values. */ |
| |
| static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */ |
| #define final_version |
| #define hamachi_debug debug |
| /* Maximum events (Rx packets, etc.) to handle at each interrupt. */ |
| static int max_interrupt_work = 40; |
| static int mtu; |
| /* Default values selected by testing on a dual processor PIII-450 */ |
| /* These six interrupt control parameters may be set directly when loading the |
| * module, or through the rx_params and tx_params variables |
| */ |
| static int max_rx_latency = 0x11; |
| static int max_rx_gap = 0x05; |
| static int min_rx_pkt = 0x18; |
| static int max_tx_latency = 0x00; |
| static int max_tx_gap = 0x00; |
| static int min_tx_pkt = 0x30; |
| |
| /* Set the copy breakpoint for the copy-only-tiny-frames scheme. |
| -Setting to > 1518 causes all frames to be copied |
| -Setting to 0 disables copies |
| */ |
| static int rx_copybreak; |
| |
| /* An override for the hardware detection of bus width. |
| Set to 1 to force 32 bit PCI bus detection. Set to 4 to force 64 bit. |
| Add 2 to disable parity detection. |
| */ |
| static int force32; |
| |
| |
| /* Used to pass the media type, etc. |
| These exist for driver interoperability. |
| No media types are currently defined. |
| - The lower 4 bits are reserved for the media type. |
| - The next three bits may be set to one of the following: |
| 0x00000000 : Autodetect PCI bus |
| 0x00000010 : Force 32 bit PCI bus |
| 0x00000020 : Disable parity detection |
| 0x00000040 : Force 64 bit PCI bus |
| Default is autodetect |
| - The next bit can be used to force half-duplex. This is a bad |
| idea since no known implementations implement half-duplex, and, |
| in general, half-duplex for gigabit ethernet is a bad idea. |
| 0x00000080 : Force half-duplex |
| Default is full-duplex. |
| - In the original driver, the ninth bit could be used to force |
| full-duplex. Maintain that for compatibility |
| 0x00000200 : Force full-duplex |
| */ |
| #define MAX_UNITS 8 /* More are supported, limit only on options */ |
| static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; |
| static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; |
| /* The Hamachi chipset supports 3 parameters each for Rx and Tx |
| * interruput management. Parameters will be loaded as specified into |
| * the TxIntControl and RxIntControl registers. |
| * |
| * The registers are arranged as follows: |
| * 23 - 16 15 - 8 7 - 0 |
| * _________________________________ |
| * | min_pkt | max_gap | max_latency | |
| * --------------------------------- |
| * min_pkt : The minimum number of packets processed between |
| * interrupts. |
| * max_gap : The maximum inter-packet gap in units of 8.192 us |
| * max_latency : The absolute time between interrupts in units of 8.192 us |
| * |
| */ |
| static int rx_params[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; |
| static int tx_params[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; |
| |
| /* 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, except for |
| excessive memory usage */ |
| /* Empirically it appears that the Tx ring needs to be a little bigger |
| for these Gbit adapters or you get into an overrun condition really |
| easily. Also, things appear to work a bit better in back-to-back |
| configurations if the Rx ring is 8 times the size of the Tx ring |
| */ |
| #define TX_RING_SIZE 64 |
| #define RX_RING_SIZE 512 |
| #define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct hamachi_desc) |
| #define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct hamachi_desc) |
| |
| /* |
| * Enable netdev_ioctl. Added interrupt coalescing parameter adjustment. |
| * 2/19/99 Pete Wyckoff <wyckoff@ca.sandia.gov> |
| */ |
| |
| /* play with 64-bit addrlen; seems to be a teensy bit slower --pw */ |
| /* #define ADDRLEN 64 */ |
| |
| /* |
| * RX_CHECKSUM turns on card-generated receive checksum generation for |
| * TCP and UDP packets. Otherwise the upper layers do the calculation. |
| * 3/10/1999 Pete Wyckoff <wyckoff@ca.sandia.gov> |
| */ |
| #define RX_CHECKSUM |
| |
| /* Operational parameters that usually are not changed. */ |
| /* Time in jiffies before concluding the transmitter is hung. */ |
| #define TX_TIMEOUT (5*HZ) |
| |
| #include <linux/capability.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/string.h> |
| #include <linux/timer.h> |
| #include <linux/time.h> |
| #include <linux/errno.h> |
| #include <linux/ioport.h> |
| #include <linux/interrupt.h> |
| #include <linux/pci.h> |
| #include <linux/init.h> |
| #include <linux/ethtool.h> |
| #include <linux/mii.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| #include <linux/ip.h> |
| #include <linux/delay.h> |
| #include <linux/bitops.h> |
| |
| #include <linux/uaccess.h> |
| #include <asm/processor.h> /* Processor type for cache alignment. */ |
| #include <asm/io.h> |
| #include <asm/unaligned.h> |
| #include <asm/cache.h> |
| |
| static const char version[] = |
| KERN_INFO DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Written by Donald Becker\n" |
| " Some modifications by Eric kasten <kasten@nscl.msu.edu>\n" |
| " Further modifications by Keith Underwood <keithu@parl.clemson.edu>\n"; |
| |
| |
| /* IP_MF appears to be only defined in <netinet/ip.h>, however, |
| we need it for hardware checksumming support. FYI... some of |
| the definitions in <netinet/ip.h> conflict/duplicate those in |
| other linux headers causing many compiler warnings. |
| */ |
| #ifndef IP_MF |
| #define IP_MF 0x2000 /* IP more frags from <netinet/ip.h> */ |
| #endif |
| |
| /* Define IP_OFFSET to be IPOPT_OFFSET */ |
| #ifndef IP_OFFSET |
| #ifdef IPOPT_OFFSET |
| #define IP_OFFSET IPOPT_OFFSET |
| #else |
| #define IP_OFFSET 2 |
| #endif |
| #endif |
| |
| #define RUN_AT(x) (jiffies + (x)) |
| |
| #ifndef ADDRLEN |
| #define ADDRLEN 32 |
| #endif |
| |
| /* Condensed bus+endian portability operations. */ |
| #if ADDRLEN == 64 |
| #define cpu_to_leXX(addr) cpu_to_le64(addr) |
| #define leXX_to_cpu(addr) le64_to_cpu(addr) |
| #else |
| #define cpu_to_leXX(addr) cpu_to_le32(addr) |
| #define leXX_to_cpu(addr) le32_to_cpu(addr) |
| #endif |
| |
| |
| /* |
| Theory of Operation |
| |
| I. Board Compatibility |
| |
| This device driver is designed for the Packet Engines "Hamachi" |
| Gigabit Ethernet chip. The only PCA currently supported is the GNIC-II 64-bit |
| 66Mhz PCI card. |
| |
| II. Board-specific settings |
| |
| No jumpers exist on the board. The chip supports software correction of |
| various motherboard wiring errors, however this driver does not support |
| that feature. |
| |
| III. Driver operation |
| |
| IIIa. Ring buffers |
| |
| The Hamachi uses a typical descriptor based bus-master architecture. |
| The descriptor list is similar to that used by the Digital Tulip. |
| This driver uses two statically allocated fixed-size descriptor lists |
| formed into rings by a branch from the final descriptor to the beginning of |
| the list. The ring sizes are set at compile time by RX/TX_RING_SIZE. |
| |
| This driver uses a zero-copy receive and transmit scheme similar my other |
| network drivers. |
| The driver allocates full frame size skbuffs for the Rx ring buffers at |
| open() time and passes the skb->data field to the Hamachi as receive data |
| buffers. When an incoming frame is less than RX_COPYBREAK bytes long, |
| a fresh skbuff is allocated and the frame is copied to the new skbuff. |
| When the incoming frame is larger, the skbuff is passed directly up the |
| protocol stack and replaced by a newly allocated skbuff. |
| |
| The RX_COPYBREAK value is chosen to trade-off the memory wasted by |
| using a full-sized skbuff for small frames vs. the copying costs of larger |
| frames. Gigabit cards are typically used on generously configured machines |
| and the underfilled buffers have negligible impact compared to the benefit of |
| a single allocation size, so the default value of zero results in never |
| copying packets. |
| |
| IIIb/c. Transmit/Receive Structure |
| |
| The Rx and Tx descriptor structure are straight-forward, with no historical |
| baggage that must be explained. Unlike the awkward DBDMA structure, there |
| are no unused fields or option bits that had only one allowable setting. |
| |
| Two details should be noted about the descriptors: The chip supports both 32 |
| bit and 64 bit address structures, and the length field is overwritten on |
| the receive descriptors. The descriptor length is set in the control word |
| for each channel. The development driver uses 32 bit addresses only, however |
| 64 bit addresses may be enabled for 64 bit architectures e.g. the Alpha. |
| |
| IIId. Synchronization |
| |
| This driver is very similar to my other network drivers. |
| The driver runs as two independent, single-threaded flows of control. One |
| is the send-packet routine, which enforces single-threaded use by the |
| dev->tbusy flag. The other thread is the interrupt handler, which is single |
| threaded by the hardware and other software. |
| |
| The send packet thread has partial control over the Tx ring and 'dev->tbusy' |
| flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next |
| queue slot is empty, it clears the tbusy flag when finished otherwise it sets |
| the 'hmp->tx_full' flag. |
| |
| The interrupt handler has exclusive control over the Rx ring and records stats |
| from the Tx ring. After reaping the stats, it marks the Tx queue entry as |
| empty by incrementing the dirty_tx mark. Iff the 'hmp->tx_full' flag is set, it |
| clears both the tx_full and tbusy flags. |
| |
| IV. Notes |
| |
| Thanks to Kim Stearns of Packet Engines for providing a pair of GNIC-II boards. |
| |
| IVb. References |
| |
| Hamachi Engineering Design Specification, 5/15/97 |
| (Note: This version was marked "Confidential".) |
| |
| IVc. Errata |
| |
| None noted. |
| |
| V. Recent Changes |
| |
| 01/15/1999 EPK Enlargement of the TX and RX ring sizes. This appears |
| to help avoid some stall conditions -- this needs further research. |
| |
| 01/15/1999 EPK Creation of the hamachi_tx function. This function cleans |
| the Tx ring and is called from hamachi_start_xmit (this used to be |
| called from hamachi_interrupt but it tends to delay execution of the |
| interrupt handler and thus reduce bandwidth by reducing the latency |
| between hamachi_rx()'s). Notably, some modification has been made so |
| that the cleaning loop checks only to make sure that the DescOwn bit |
| isn't set in the status flag since the card is not required |
| to set the entire flag to zero after processing. |
| |
| 01/15/1999 EPK In the hamachi_start_tx function, the Tx ring full flag is |
| checked before attempting to add a buffer to the ring. If the ring is full |
| an attempt is made to free any dirty buffers and thus find space for |
| the new buffer or the function returns non-zero which should case the |
| scheduler to reschedule the buffer later. |
| |
| 01/15/1999 EPK Some adjustments were made to the chip initialization. |
| End-to-end flow control should now be fully active and the interrupt |
| algorithm vars have been changed. These could probably use further tuning. |
| |
| 01/15/1999 EPK Added the max_{rx,tx}_latency options. These are used to |
| set the rx and tx latencies for the Hamachi interrupts. If you're having |
| problems with network stalls, try setting these to higher values. |
| Valid values are 0x00 through 0xff. |
| |
| 01/15/1999 EPK In general, the overall bandwidth has increased and |
| latencies are better (sometimes by a factor of 2). Stalls are rare at |
| this point, however there still appears to be a bug somewhere between the |
| hardware and driver. TCP checksum errors under load also appear to be |
| eliminated at this point. |
| |
| 01/18/1999 EPK Ensured that the DescEndRing bit was being set on both the |
| Rx and Tx rings. This appears to have been affecting whether a particular |
| peer-to-peer connection would hang under high load. I believe the Rx |
| rings was typically getting set correctly, but the Tx ring wasn't getting |
| the DescEndRing bit set during initialization. ??? Does this mean the |
| hamachi card is using the DescEndRing in processing even if a particular |
| slot isn't in use -- hypothetically, the card might be searching the |
| entire Tx ring for slots with the DescOwn bit set and then processing |
| them. If the DescEndRing bit isn't set, then it might just wander off |
| through memory until it hits a chunk of data with that bit set |
| and then looping back. |
| |
| 02/09/1999 EPK Added Michel Mueller's TxDMA Interrupt and Tx-timeout |
| problem (TxCmd and RxCmd need only to be set when idle or stopped. |
| |
| 02/09/1999 EPK Added code to check/reset dev->tbusy in hamachi_interrupt. |
| (Michel Mueller pointed out the ``permanently busy'' potential |
| problem here). |
| |
| 02/22/1999 EPK Added Pete Wyckoff's ioctl to control the Tx/Rx latencies. |
| |
| 02/23/1999 EPK Verified that the interrupt status field bits for Tx were |
| incorrectly defined and corrected (as per Michel Mueller). |
| |
| 02/23/1999 EPK Corrected the Tx full check to check that at least 4 slots |
| were available before resetting the tbusy and tx_full flags |
| (as per Michel Mueller). |
| |
| 03/11/1999 EPK Added Pete Wyckoff's hardware checksumming support. |
| |
| 12/31/1999 KDU Cleaned up assorted things and added Don's code to force |
| 32 bit. |
| |
| 02/20/2000 KDU Some of the control was just plain odd. Cleaned up the |
| hamachi_start_xmit() and hamachi_interrupt() code. There is still some |
| re-structuring I would like to do. |
| |
| 03/01/2000 KDU Experimenting with a WIDE range of interrupt mitigation |
| parameters on a dual P3-450 setup yielded the new default interrupt |
| mitigation parameters. Tx should interrupt VERY infrequently due to |
| Eric's scheme. Rx should be more often... |
| |
| 03/13/2000 KDU Added a patch to make the Rx Checksum code interact |
| nicely with non-linux machines. |
| |
| 03/13/2000 KDU Experimented with some of the configuration values: |
| |
| -It seems that enabling PCI performance commands for descriptors |
| (changing RxDMACtrl and TxDMACtrl lower nibble from 5 to D) has minimal |
| performance impact for any of my tests. (ttcp, netpipe, netperf) I will |
| leave them that way until I hear further feedback. |
| |
| -Increasing the PCI_LATENCY_TIMER to 130 |
| (2 + (burst size of 128 * (0 wait states + 1))) seems to slightly |
| degrade performance. Leaving default at 64 pending further information. |
| |
| 03/14/2000 KDU Further tuning: |
| |
| -adjusted boguscnt in hamachi_rx() to depend on interrupt |
| mitigation parameters chosen. |
| |
| -Selected a set of interrupt parameters based on some extensive testing. |
| These may change with more testing. |
| |
| TO DO: |
| |
| -Consider borrowing from the acenic driver code to check PCI_COMMAND for |
| PCI_COMMAND_INVALIDATE. Set maximum burst size to cache line size in |
| that case. |
| |
| -fix the reset procedure. It doesn't quite work. |
| */ |
| |
| /* A few values that may be tweaked. */ |
| /* Size of each temporary Rx buffer, calculated as: |
| * 1518 bytes (ethernet packet) + 2 bytes (to get 8 byte alignment for |
| * the card) + 8 bytes of status info + 8 bytes for the Rx Checksum |
| */ |
| #define PKT_BUF_SZ 1536 |
| |
| /* For now, this is going to be set to the maximum size of an ethernet |
| * packet. Eventually, we may want to make it a variable that is |
| * related to the MTU |
| */ |
| #define MAX_FRAME_SIZE 1518 |
| |
| /* The rest of these values should never change. */ |
| |
| static void hamachi_timer(struct timer_list *t); |
| |
| enum capability_flags {CanHaveMII=1, }; |
| static const struct chip_info { |
| u16 vendor_id, device_id, device_id_mask, pad; |
| const char *name; |
| void (*media_timer)(struct timer_list *t); |
| int flags; |
| } chip_tbl[] = { |
| {0x1318, 0x0911, 0xffff, 0, "Hamachi GNIC-II", hamachi_timer, 0}, |
| {0,}, |
| }; |
| |
| /* Offsets to the Hamachi registers. Various sizes. */ |
| enum hamachi_offsets { |
| TxDMACtrl=0x00, TxCmd=0x04, TxStatus=0x06, TxPtr=0x08, TxCurPtr=0x10, |
| RxDMACtrl=0x20, RxCmd=0x24, RxStatus=0x26, RxPtr=0x28, RxCurPtr=0x30, |
| PCIClkMeas=0x060, MiscStatus=0x066, ChipRev=0x68, ChipReset=0x06B, |
| LEDCtrl=0x06C, VirtualJumpers=0x06D, GPIO=0x6E, |
| TxChecksum=0x074, RxChecksum=0x076, |
| TxIntrCtrl=0x078, RxIntrCtrl=0x07C, |
| InterruptEnable=0x080, InterruptClear=0x084, IntrStatus=0x088, |
| EventStatus=0x08C, |
| MACCnfg=0x0A0, FrameGap0=0x0A2, FrameGap1=0x0A4, |
| /* See enum MII_offsets below. */ |
| MACCnfg2=0x0B0, RxDepth=0x0B8, FlowCtrl=0x0BC, MaxFrameSize=0x0CE, |
| AddrMode=0x0D0, StationAddr=0x0D2, |
| /* Gigabit AutoNegotiation. */ |
| ANCtrl=0x0E0, ANStatus=0x0E2, ANXchngCtrl=0x0E4, ANAdvertise=0x0E8, |
| ANLinkPartnerAbility=0x0EA, |
| EECmdStatus=0x0F0, EEData=0x0F1, EEAddr=0x0F2, |
| FIFOcfg=0x0F8, |
| }; |
| |
| /* Offsets to the MII-mode registers. */ |
| enum MII_offsets { |
| MII_Cmd=0xA6, MII_Addr=0xA8, MII_Wr_Data=0xAA, MII_Rd_Data=0xAC, |
| MII_Status=0xAE, |
| }; |
| |
| /* Bits in the interrupt status/mask registers. */ |
| enum intr_status_bits { |
| IntrRxDone=0x01, IntrRxPCIFault=0x02, IntrRxPCIErr=0x04, |
| IntrTxDone=0x100, IntrTxPCIFault=0x200, IntrTxPCIErr=0x400, |
| LinkChange=0x10000, NegotiationChange=0x20000, StatsMax=0x40000, }; |
| |
| /* The Hamachi Rx and Tx buffer descriptors. */ |
| struct hamachi_desc { |
| __le32 status_n_length; |
| #if ADDRLEN == 64 |
| u32 pad; |
| __le64 addr; |
| #else |
| __le32 addr; |
| #endif |
| }; |
| |
| /* Bits in hamachi_desc.status_n_length */ |
| enum desc_status_bits { |
| DescOwn=0x80000000, DescEndPacket=0x40000000, DescEndRing=0x20000000, |
| DescIntr=0x10000000, |
| }; |
| |
| #define PRIV_ALIGN 15 /* Required alignment mask */ |
| #define MII_CNT 4 |
| struct hamachi_private { |
| /* Descriptor rings first for alignment. Tx requires a second descriptor |
| for status. */ |
| struct hamachi_desc *rx_ring; |
| struct hamachi_desc *tx_ring; |
| struct sk_buff* rx_skbuff[RX_RING_SIZE]; |
| struct sk_buff* tx_skbuff[TX_RING_SIZE]; |
| dma_addr_t tx_ring_dma; |
| dma_addr_t rx_ring_dma; |
| struct timer_list timer; /* Media selection timer. */ |
| /* Frequently used and paired value: keep adjacent for cache effect. */ |
| spinlock_t lock; |
| int chip_id; |
| unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */ |
| unsigned int cur_tx, dirty_tx; |
| unsigned int rx_buf_sz; /* Based on MTU+slack. */ |
| unsigned int tx_full:1; /* The Tx queue is full. */ |
| unsigned int duplex_lock:1; |
| unsigned int default_port:4; /* Last dev->if_port value. */ |
| /* MII transceiver section. */ |
| int mii_cnt; /* MII device addresses. */ |
| struct mii_if_info mii_if; /* MII lib hooks/info */ |
| unsigned char phys[MII_CNT]; /* MII device addresses, only first one used. */ |
| u32 rx_int_var, tx_int_var; /* interrupt control variables */ |
| u32 option; /* Hold on to a copy of the options */ |
| struct pci_dev *pci_dev; |
| void __iomem *base; |
| }; |
| |
| MODULE_AUTHOR("Donald Becker <becker@scyld.com>, Eric Kasten <kasten@nscl.msu.edu>, Keith Underwood <keithu@parl.clemson.edu>"); |
| MODULE_DESCRIPTION("Packet Engines 'Hamachi' GNIC-II Gigabit Ethernet driver"); |
| MODULE_LICENSE("GPL"); |
| |
| module_param(max_interrupt_work, int, 0); |
| module_param(mtu, int, 0); |
| module_param(debug, int, 0); |
| module_param(min_rx_pkt, int, 0); |
| module_param(max_rx_gap, int, 0); |
| module_param(max_rx_latency, int, 0); |
| module_param(min_tx_pkt, int, 0); |
| module_param(max_tx_gap, int, 0); |
| module_param(max_tx_latency, int, 0); |
| module_param(rx_copybreak, int, 0); |
| module_param_array(rx_params, int, NULL, 0); |
| module_param_array(tx_params, int, NULL, 0); |
| module_param_array(options, int, NULL, 0); |
| module_param_array(full_duplex, int, NULL, 0); |
| module_param(force32, int, 0); |
| MODULE_PARM_DESC(max_interrupt_work, "GNIC-II maximum events handled per interrupt"); |
| MODULE_PARM_DESC(mtu, "GNIC-II MTU (all boards)"); |
| MODULE_PARM_DESC(debug, "GNIC-II debug level (0-7)"); |
| MODULE_PARM_DESC(min_rx_pkt, "GNIC-II minimum Rx packets processed between interrupts"); |
| MODULE_PARM_DESC(max_rx_gap, "GNIC-II maximum Rx inter-packet gap in 8.192 microsecond units"); |
| MODULE_PARM_DESC(max_rx_latency, "GNIC-II time between Rx interrupts in 8.192 microsecond units"); |
| MODULE_PARM_DESC(min_tx_pkt, "GNIC-II minimum Tx packets processed between interrupts"); |
| MODULE_PARM_DESC(max_tx_gap, "GNIC-II maximum Tx inter-packet gap in 8.192 microsecond units"); |
| MODULE_PARM_DESC(max_tx_latency, "GNIC-II time between Tx interrupts in 8.192 microsecond units"); |
| MODULE_PARM_DESC(rx_copybreak, "GNIC-II copy breakpoint for copy-only-tiny-frames"); |
| MODULE_PARM_DESC(rx_params, "GNIC-II min_rx_pkt+max_rx_gap+max_rx_latency"); |
| MODULE_PARM_DESC(tx_params, "GNIC-II min_tx_pkt+max_tx_gap+max_tx_latency"); |
| MODULE_PARM_DESC(options, "GNIC-II Bits 0-3: media type, bits 4-6: as force32, bit 7: half duplex, bit 9 full duplex"); |
| MODULE_PARM_DESC(full_duplex, "GNIC-II full duplex setting(s) (1)"); |
| MODULE_PARM_DESC(force32, "GNIC-II: Bit 0: 32 bit PCI, bit 1: disable parity, bit 2: 64 bit PCI (all boards)"); |
| |
| static int read_eeprom(void __iomem *ioaddr, int location); |
| static int mdio_read(struct net_device *dev, int phy_id, int location); |
| static void mdio_write(struct net_device *dev, int phy_id, int location, int value); |
| static int hamachi_open(struct net_device *dev); |
| static int hamachi_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); |
| static int hamachi_siocdevprivate(struct net_device *dev, struct ifreq *rq, |
| void __user *data, int cmd); |
| static void hamachi_timer(struct timer_list *t); |
| static void hamachi_tx_timeout(struct net_device *dev, unsigned int txqueue); |
| static void hamachi_init_ring(struct net_device *dev); |
| static netdev_tx_t hamachi_start_xmit(struct sk_buff *skb, |
| struct net_device *dev); |
| static irqreturn_t hamachi_interrupt(int irq, void *dev_instance); |
| static int hamachi_rx(struct net_device *dev); |
| static inline int hamachi_tx(struct net_device *dev); |
| static void hamachi_error(struct net_device *dev, int intr_status); |
| static int hamachi_close(struct net_device *dev); |
| static struct net_device_stats *hamachi_get_stats(struct net_device *dev); |
| static void set_rx_mode(struct net_device *dev); |
| static const struct ethtool_ops ethtool_ops; |
| static const struct ethtool_ops ethtool_ops_no_mii; |
| |
| static const struct net_device_ops hamachi_netdev_ops = { |
| .ndo_open = hamachi_open, |
| .ndo_stop = hamachi_close, |
| .ndo_start_xmit = hamachi_start_xmit, |
| .ndo_get_stats = hamachi_get_stats, |
| .ndo_set_rx_mode = set_rx_mode, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_set_mac_address = eth_mac_addr, |
| .ndo_tx_timeout = hamachi_tx_timeout, |
| .ndo_eth_ioctl = hamachi_ioctl, |
| .ndo_siocdevprivate = hamachi_siocdevprivate, |
| }; |
| |
| |
| static int hamachi_init_one(struct pci_dev *pdev, |
| const struct pci_device_id *ent) |
| { |
| struct hamachi_private *hmp; |
| int option, i, rx_int_var, tx_int_var, boguscnt; |
| int chip_id = ent->driver_data; |
| int irq; |
| void __iomem *ioaddr; |
| unsigned long base; |
| static int card_idx; |
| struct net_device *dev; |
| void *ring_space; |
| dma_addr_t ring_dma; |
| int ret = -ENOMEM; |
| |
| /* when built into the kernel, we only print version if device is found */ |
| #ifndef MODULE |
| static int printed_version; |
| if (!printed_version++) |
| printk(version); |
| #endif |
| |
| if (pci_enable_device(pdev)) { |
| ret = -EIO; |
| goto err_out; |
| } |
| |
| base = pci_resource_start(pdev, 0); |
| #ifdef __alpha__ /* Really "64 bit addrs" */ |
| base |= (pci_resource_start(pdev, 1) << 32); |
| #endif |
| |
| pci_set_master(pdev); |
| |
| i = pci_request_regions(pdev, DRV_NAME); |
| if (i) |
| return i; |
| |
| irq = pdev->irq; |
| ioaddr = ioremap(base, 0x400); |
| if (!ioaddr) |
| goto err_out_release; |
| |
| dev = alloc_etherdev(sizeof(struct hamachi_private)); |
| if (!dev) |
| goto err_out_iounmap; |
| |
| SET_NETDEV_DEV(dev, &pdev->dev); |
| |
| for (i = 0; i < 6; i++) |
| dev->dev_addr[i] = 1 ? read_eeprom(ioaddr, 4 + i) |
| : readb(ioaddr + StationAddr + i); |
| |
| #if ! defined(final_version) |
| if (hamachi_debug > 4) |
| for (i = 0; i < 0x10; i++) |
| printk("%2.2x%s", |
| read_eeprom(ioaddr, i), i % 16 != 15 ? " " : "\n"); |
| #endif |
| |
| hmp = netdev_priv(dev); |
| spin_lock_init(&hmp->lock); |
| |
| hmp->mii_if.dev = dev; |
| hmp->mii_if.mdio_read = mdio_read; |
| hmp->mii_if.mdio_write = mdio_write; |
| hmp->mii_if.phy_id_mask = 0x1f; |
| hmp->mii_if.reg_num_mask = 0x1f; |
| |
| ring_space = dma_alloc_coherent(&pdev->dev, TX_TOTAL_SIZE, &ring_dma, |
| GFP_KERNEL); |
| if (!ring_space) |
| goto err_out_cleardev; |
| hmp->tx_ring = ring_space; |
| hmp->tx_ring_dma = ring_dma; |
| |
| ring_space = dma_alloc_coherent(&pdev->dev, RX_TOTAL_SIZE, &ring_dma, |
| GFP_KERNEL); |
| if (!ring_space) |
| goto err_out_unmap_tx; |
| hmp->rx_ring = ring_space; |
| hmp->rx_ring_dma = ring_dma; |
| |
| /* Check for options being passed in */ |
| option = card_idx < MAX_UNITS ? options[card_idx] : 0; |
| if (dev->mem_start) |
| option = dev->mem_start; |
| |
| /* If the bus size is misidentified, do the following. */ |
| force32 = force32 ? force32 : |
| ((option >= 0) ? ((option & 0x00000070) >> 4) : 0 ); |
| if (force32) |
| writeb(force32, ioaddr + VirtualJumpers); |
| |
| /* Hmmm, do we really need to reset the chip???. */ |
| writeb(0x01, ioaddr + ChipReset); |
| |
| /* After a reset, the clock speed measurement of the PCI bus will not |
| * be valid for a moment. Wait for a little while until it is. If |
| * it takes more than 10ms, forget it. |
| */ |
| udelay(10); |
| i = readb(ioaddr + PCIClkMeas); |
| for (boguscnt = 0; (!(i & 0x080)) && boguscnt < 1000; boguscnt++){ |
| udelay(10); |
| i = readb(ioaddr + PCIClkMeas); |
| } |
| |
| hmp->base = ioaddr; |
| pci_set_drvdata(pdev, dev); |
| |
| hmp->chip_id = chip_id; |
| hmp->pci_dev = pdev; |
| |
| /* The lower four bits are the media type. */ |
| if (option > 0) { |
| hmp->option = option; |
| if (option & 0x200) |
| hmp->mii_if.full_duplex = 1; |
| else if (option & 0x080) |
| hmp->mii_if.full_duplex = 0; |
| hmp->default_port = option & 15; |
| if (hmp->default_port) |
| hmp->mii_if.force_media = 1; |
| } |
| if (card_idx < MAX_UNITS && full_duplex[card_idx] > 0) |
| hmp->mii_if.full_duplex = 1; |
| |
| /* lock the duplex mode if someone specified a value */ |
| if (hmp->mii_if.full_duplex || (option & 0x080)) |
| hmp->duplex_lock = 1; |
| |
| /* Set interrupt tuning parameters */ |
| max_rx_latency = max_rx_latency & 0x00ff; |
| max_rx_gap = max_rx_gap & 0x00ff; |
| min_rx_pkt = min_rx_pkt & 0x00ff; |
| max_tx_latency = max_tx_latency & 0x00ff; |
| max_tx_gap = max_tx_gap & 0x00ff; |
| min_tx_pkt = min_tx_pkt & 0x00ff; |
| |
| rx_int_var = card_idx < MAX_UNITS ? rx_params[card_idx] : -1; |
| tx_int_var = card_idx < MAX_UNITS ? tx_params[card_idx] : -1; |
| hmp->rx_int_var = rx_int_var >= 0 ? rx_int_var : |
| (min_rx_pkt << 16 | max_rx_gap << 8 | max_rx_latency); |
| hmp->tx_int_var = tx_int_var >= 0 ? tx_int_var : |
| (min_tx_pkt << 16 | max_tx_gap << 8 | max_tx_latency); |
| |
| |
| /* The Hamachi-specific entries in the device structure. */ |
| dev->netdev_ops = &hamachi_netdev_ops; |
| dev->ethtool_ops = (chip_tbl[hmp->chip_id].flags & CanHaveMII) ? |
| ðtool_ops : ðtool_ops_no_mii; |
| dev->watchdog_timeo = TX_TIMEOUT; |
| if (mtu) |
| dev->mtu = mtu; |
| |
| i = register_netdev(dev); |
| if (i) { |
| ret = i; |
| goto err_out_unmap_rx; |
| } |
| |
| printk(KERN_INFO "%s: %s type %x at %p, %pM, IRQ %d.\n", |
| dev->name, chip_tbl[chip_id].name, readl(ioaddr + ChipRev), |
| ioaddr, dev->dev_addr, irq); |
| i = readb(ioaddr + PCIClkMeas); |
| printk(KERN_INFO "%s: %d-bit %d Mhz PCI bus (%d), Virtual Jumpers " |
| "%2.2x, LPA %4.4x.\n", |
| dev->name, readw(ioaddr + MiscStatus) & 1 ? 64 : 32, |
| i ? 2000/(i&0x7f) : 0, i&0x7f, (int)readb(ioaddr + VirtualJumpers), |
| readw(ioaddr + ANLinkPartnerAbility)); |
| |
| if (chip_tbl[hmp->chip_id].flags & CanHaveMII) { |
| int phy, phy_idx = 0; |
| for (phy = 0; phy < 32 && phy_idx < MII_CNT; phy++) { |
| int mii_status = mdio_read(dev, phy, MII_BMSR); |
| if (mii_status != 0xffff && |
| mii_status != 0x0000) { |
| hmp->phys[phy_idx++] = phy; |
| hmp->mii_if.advertising = mdio_read(dev, phy, MII_ADVERTISE); |
| printk(KERN_INFO "%s: MII PHY found at address %d, status " |
| "0x%4.4x advertising %4.4x.\n", |
| dev->name, phy, mii_status, hmp->mii_if.advertising); |
| } |
| } |
| hmp->mii_cnt = phy_idx; |
| if (hmp->mii_cnt > 0) |
| hmp->mii_if.phy_id = hmp->phys[0]; |
| else |
| memset(&hmp->mii_if, 0, sizeof(hmp->mii_if)); |
| } |
| /* Configure gigabit autonegotiation. */ |
| writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */ |
| writew(0x08e0, ioaddr + ANAdvertise); /* Set our advertise word. */ |
| writew(0x1000, ioaddr + ANCtrl); /* Enable negotiation */ |
| |
| card_idx++; |
| return 0; |
| |
| err_out_unmap_rx: |
| dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE, hmp->rx_ring, |
| hmp->rx_ring_dma); |
| err_out_unmap_tx: |
| dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE, hmp->tx_ring, |
| hmp->tx_ring_dma); |
| err_out_cleardev: |
| free_netdev (dev); |
| err_out_iounmap: |
| iounmap(ioaddr); |
| err_out_release: |
| pci_release_regions(pdev); |
| err_out: |
| return ret; |
| } |
| |
| static int read_eeprom(void __iomem *ioaddr, int location) |
| { |
| int bogus_cnt = 1000; |
| |
| /* We should check busy first - per docs -KDU */ |
| while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0); |
| writew(location, ioaddr + EEAddr); |
| writeb(0x02, ioaddr + EECmdStatus); |
| bogus_cnt = 1000; |
| while ((readb(ioaddr + EECmdStatus) & 0x40) && --bogus_cnt > 0); |
| if (hamachi_debug > 5) |
| printk(" EEPROM status is %2.2x after %d ticks.\n", |
| (int)readb(ioaddr + EECmdStatus), 1000- bogus_cnt); |
| return readb(ioaddr + EEData); |
| } |
| |
| /* MII Managemen Data I/O accesses. |
| These routines assume the MDIO controller is idle, and do not exit until |
| the command is finished. */ |
| |
| static int mdio_read(struct net_device *dev, int phy_id, int location) |
| { |
| struct hamachi_private *hmp = netdev_priv(dev); |
| void __iomem *ioaddr = hmp->base; |
| int i; |
| |
| /* We should check busy first - per docs -KDU */ |
| for (i = 10000; i >= 0; i--) |
| if ((readw(ioaddr + MII_Status) & 1) == 0) |
| break; |
| writew((phy_id<<8) + location, ioaddr + MII_Addr); |
| writew(0x0001, ioaddr + MII_Cmd); |
| for (i = 10000; i >= 0; i--) |
| if ((readw(ioaddr + MII_Status) & 1) == 0) |
| break; |
| return readw(ioaddr + MII_Rd_Data); |
| } |
| |
| static void mdio_write(struct net_device *dev, int phy_id, int location, int value) |
| { |
| struct hamachi_private *hmp = netdev_priv(dev); |
| void __iomem *ioaddr = hmp->base; |
| int i; |
| |
| /* We should check busy first - per docs -KDU */ |
| for (i = 10000; i >= 0; i--) |
| if ((readw(ioaddr + MII_Status) & 1) == 0) |
| break; |
| writew((phy_id<<8) + location, ioaddr + MII_Addr); |
| writew(value, ioaddr + MII_Wr_Data); |
| |
| /* Wait for the command to finish. */ |
| for (i = 10000; i >= 0; i--) |
| if ((readw(ioaddr + MII_Status) & 1) == 0) |
| break; |
| } |
| |
| |
| static int hamachi_open(struct net_device *dev) |
| { |
| struct hamachi_private *hmp = netdev_priv(dev); |
| void __iomem *ioaddr = hmp->base; |
| int i; |
| u32 rx_int_var, tx_int_var; |
| u16 fifo_info; |
| |
| i = request_irq(hmp->pci_dev->irq, hamachi_interrupt, IRQF_SHARED, |
| dev->name, dev); |
| if (i) |
| return i; |
| |
| hamachi_init_ring(dev); |
| |
| #if ADDRLEN == 64 |
| /* writellll anyone ? */ |
| writel(hmp->rx_ring_dma, ioaddr + RxPtr); |
| writel(hmp->rx_ring_dma >> 32, ioaddr + RxPtr + 4); |
| writel(hmp->tx_ring_dma, ioaddr + TxPtr); |
| writel(hmp->tx_ring_dma >> 32, ioaddr + TxPtr + 4); |
| #else |
| writel(hmp->rx_ring_dma, ioaddr + RxPtr); |
| writel(hmp->tx_ring_dma, ioaddr + TxPtr); |
| #endif |
| |
| /* TODO: It would make sense to organize this as words since the card |
| * documentation does. -KDU |
| */ |
| for (i = 0; i < 6; i++) |
| writeb(dev->dev_addr[i], ioaddr + StationAddr + i); |
| |
| /* Initialize other registers: with so many this eventually this will |
| converted to an offset/value list. */ |
| |
| /* Configure the FIFO */ |
| fifo_info = (readw(ioaddr + GPIO) & 0x00C0) >> 6; |
| switch (fifo_info){ |
| case 0 : |
| /* No FIFO */ |
| writew(0x0000, ioaddr + FIFOcfg); |
| break; |
| case 1 : |
| /* Configure the FIFO for 512K external, 16K used for Tx. */ |
| writew(0x0028, ioaddr + FIFOcfg); |
| break; |
| case 2 : |
| /* Configure the FIFO for 1024 external, 32K used for Tx. */ |
| writew(0x004C, ioaddr + FIFOcfg); |
| break; |
| case 3 : |
| /* Configure the FIFO for 2048 external, 32K used for Tx. */ |
| writew(0x006C, ioaddr + FIFOcfg); |
| break; |
| default : |
| printk(KERN_WARNING "%s: Unsupported external memory config!\n", |
| dev->name); |
| /* Default to no FIFO */ |
| writew(0x0000, ioaddr + FIFOcfg); |
| break; |
| } |
| |
| if (dev->if_port == 0) |
| dev->if_port = hmp->default_port; |
| |
| |
| /* Setting the Rx mode will start the Rx process. */ |
| /* If someone didn't choose a duplex, default to full-duplex */ |
| if (hmp->duplex_lock != 1) |
| hmp->mii_if.full_duplex = 1; |
| |
| /* always 1, takes no more time to do it */ |
| writew(0x0001, ioaddr + RxChecksum); |
| writew(0x0000, ioaddr + TxChecksum); |
| writew(0x8000, ioaddr + MACCnfg); /* Soft reset the MAC */ |
| writew(0x215F, ioaddr + MACCnfg); |
| writew(0x000C, ioaddr + FrameGap0); |
| /* WHAT?!?!? Why isn't this documented somewhere? -KDU */ |
| writew(0x1018, ioaddr + FrameGap1); |
| /* Why do we enable receives/transmits here? -KDU */ |
| writew(0x0780, ioaddr + MACCnfg2); /* Upper 16 bits control LEDs. */ |
| /* Enable automatic generation of flow control frames, period 0xffff. */ |
| writel(0x0030FFFF, ioaddr + FlowCtrl); |
| writew(MAX_FRAME_SIZE, ioaddr + MaxFrameSize); /* dev->mtu+14 ??? */ |
| |
| /* Enable legacy links. */ |
| writew(0x0400, ioaddr + ANXchngCtrl); /* Enable legacy links. */ |
| /* Initial Link LED to blinking red. */ |
| writeb(0x03, ioaddr + LEDCtrl); |
| |
| /* Configure interrupt mitigation. This has a great effect on |
| performance, so systems tuning should start here!. */ |
| |
| rx_int_var = hmp->rx_int_var; |
| tx_int_var = hmp->tx_int_var; |
| |
| if (hamachi_debug > 1) { |
| printk("max_tx_latency: %d, max_tx_gap: %d, min_tx_pkt: %d\n", |
| tx_int_var & 0x00ff, (tx_int_var & 0x00ff00) >> 8, |
| (tx_int_var & 0x00ff0000) >> 16); |
| printk("max_rx_latency: %d, max_rx_gap: %d, min_rx_pkt: %d\n", |
| rx_int_var & 0x00ff, (rx_int_var & 0x00ff00) >> 8, |
| (rx_int_var & 0x00ff0000) >> 16); |
| printk("rx_int_var: %x, tx_int_var: %x\n", rx_int_var, tx_int_var); |
| } |
| |
| writel(tx_int_var, ioaddr + TxIntrCtrl); |
| writel(rx_int_var, ioaddr + RxIntrCtrl); |
| |
| set_rx_mode(dev); |
| |
| netif_start_queue(dev); |
| |
| /* Enable interrupts by setting the interrupt mask. */ |
| writel(0x80878787, ioaddr + InterruptEnable); |
| writew(0x0000, ioaddr + EventStatus); /* Clear non-interrupting events */ |
| |
| /* Configure and start the DMA channels. */ |
| /* Burst sizes are in the low three bits: size = 4<<(val&7) */ |
| #if ADDRLEN == 64 |
| writew(0x005D, ioaddr + RxDMACtrl); /* 128 dword bursts */ |
| writew(0x005D, ioaddr + TxDMACtrl); |
| #else |
| writew(0x001D, ioaddr + RxDMACtrl); |
| writew(0x001D, ioaddr + TxDMACtrl); |
| #endif |
| writew(0x0001, ioaddr + RxCmd); |
| |
| if (hamachi_debug > 2) { |
| printk(KERN_DEBUG "%s: Done hamachi_open(), status: Rx %x Tx %x.\n", |
| dev->name, readw(ioaddr + RxStatus), readw(ioaddr + TxStatus)); |
| } |
| /* Set the timer to check for link beat. */ |
| timer_setup(&hmp->timer, hamachi_timer, 0); |
| hmp->timer.expires = RUN_AT((24*HZ)/10); /* 2.4 sec. */ |
| add_timer(&hmp->timer); |
| |
| return 0; |
| } |
| |
| static inline int hamachi_tx(struct net_device *dev) |
| { |
| struct hamachi_private *hmp = netdev_priv(dev); |
| |
| /* Update the dirty pointer until we find an entry that is |
| still owned by the card */ |
| for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++) { |
| int entry = hmp->dirty_tx % TX_RING_SIZE; |
| struct sk_buff *skb; |
| |
| if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn)) |
| break; |
| /* Free the original skb. */ |
| skb = hmp->tx_skbuff[entry]; |
| if (skb) { |
| dma_unmap_single(&hmp->pci_dev->dev, |
| leXX_to_cpu(hmp->tx_ring[entry].addr), |
| skb->len, DMA_TO_DEVICE); |
| dev_kfree_skb(skb); |
| hmp->tx_skbuff[entry] = NULL; |
| } |
| hmp->tx_ring[entry].status_n_length = 0; |
| if (entry >= TX_RING_SIZE-1) |
| hmp->tx_ring[TX_RING_SIZE-1].status_n_length |= |
| cpu_to_le32(DescEndRing); |
| dev->stats.tx_packets++; |
| } |
| |
| return 0; |
| } |
| |
| static void hamachi_timer(struct timer_list *t) |
| { |
| struct hamachi_private *hmp = from_timer(hmp, t, timer); |
| struct net_device *dev = hmp->mii_if.dev; |
| void __iomem *ioaddr = hmp->base; |
| int next_tick = 10*HZ; |
| |
| if (hamachi_debug > 2) { |
| printk(KERN_INFO "%s: Hamachi Autonegotiation status %4.4x, LPA " |
| "%4.4x.\n", dev->name, readw(ioaddr + ANStatus), |
| readw(ioaddr + ANLinkPartnerAbility)); |
| printk(KERN_INFO "%s: Autonegotiation regs %4.4x %4.4x %4.4x " |
| "%4.4x %4.4x %4.4x.\n", dev->name, |
| readw(ioaddr + 0x0e0), |
| readw(ioaddr + 0x0e2), |
| readw(ioaddr + 0x0e4), |
| readw(ioaddr + 0x0e6), |
| readw(ioaddr + 0x0e8), |
| readw(ioaddr + 0x0eA)); |
| } |
| /* We could do something here... nah. */ |
| hmp->timer.expires = RUN_AT(next_tick); |
| add_timer(&hmp->timer); |
| } |
| |
| static void hamachi_tx_timeout(struct net_device *dev, unsigned int txqueue) |
| { |
| int i; |
| struct hamachi_private *hmp = netdev_priv(dev); |
| void __iomem *ioaddr = hmp->base; |
| |
| printk(KERN_WARNING "%s: Hamachi transmit timed out, status %8.8x," |
| " resetting...\n", dev->name, (int)readw(ioaddr + TxStatus)); |
| |
| { |
| printk(KERN_DEBUG " Rx ring %p: ", hmp->rx_ring); |
| for (i = 0; i < RX_RING_SIZE; i++) |
| printk(KERN_CONT " %8.8x", |
| le32_to_cpu(hmp->rx_ring[i].status_n_length)); |
| printk(KERN_CONT "\n"); |
| printk(KERN_DEBUG" Tx ring %p: ", hmp->tx_ring); |
| for (i = 0; i < TX_RING_SIZE; i++) |
| printk(KERN_CONT " %4.4x", |
| le32_to_cpu(hmp->tx_ring[i].status_n_length)); |
| printk(KERN_CONT "\n"); |
| } |
| |
| /* Reinit the hardware and make sure the Rx and Tx processes |
| are up and running. |
| */ |
| dev->if_port = 0; |
| /* The right way to do Reset. -KDU |
| * -Clear OWN bit in all Rx/Tx descriptors |
| * -Wait 50 uS for channels to go idle |
| * -Turn off MAC receiver |
| * -Issue Reset |
| */ |
| |
| for (i = 0; i < RX_RING_SIZE; i++) |
| hmp->rx_ring[i].status_n_length &= cpu_to_le32(~DescOwn); |
| |
| /* Presume that all packets in the Tx queue are gone if we have to |
| * re-init the hardware. |
| */ |
| for (i = 0; i < TX_RING_SIZE; i++){ |
| struct sk_buff *skb; |
| |
| if (i >= TX_RING_SIZE - 1) |
| hmp->tx_ring[i].status_n_length = |
| cpu_to_le32(DescEndRing) | |
| (hmp->tx_ring[i].status_n_length & |
| cpu_to_le32(0x0000ffff)); |
| else |
| hmp->tx_ring[i].status_n_length &= cpu_to_le32(0x0000ffff); |
| skb = hmp->tx_skbuff[i]; |
| if (skb){ |
| dma_unmap_single(&hmp->pci_dev->dev, |
| leXX_to_cpu(hmp->tx_ring[i].addr), |
| skb->len, DMA_TO_DEVICE); |
| dev_kfree_skb(skb); |
| hmp->tx_skbuff[i] = NULL; |
| } |
| } |
| |
| udelay(60); /* Sleep 60 us just for safety sake */ |
| writew(0x0002, ioaddr + RxCmd); /* STOP Rx */ |
| |
| writeb(0x01, ioaddr + ChipReset); /* Reinit the hardware */ |
| |
| hmp->tx_full = 0; |
| hmp->cur_rx = hmp->cur_tx = 0; |
| hmp->dirty_rx = hmp->dirty_tx = 0; |
| /* Rx packets are also presumed lost; however, we need to make sure a |
| * ring of buffers is in tact. -KDU |
| */ |
| for (i = 0; i < RX_RING_SIZE; i++){ |
| struct sk_buff *skb = hmp->rx_skbuff[i]; |
| |
| if (skb){ |
| dma_unmap_single(&hmp->pci_dev->dev, |
| leXX_to_cpu(hmp->rx_ring[i].addr), |
| hmp->rx_buf_sz, DMA_FROM_DEVICE); |
| dev_kfree_skb(skb); |
| hmp->rx_skbuff[i] = NULL; |
| } |
| } |
| /* Fill in the Rx buffers. Handle allocation failure gracefully. */ |
| for (i = 0; i < RX_RING_SIZE; i++) { |
| struct sk_buff *skb; |
| |
| skb = netdev_alloc_skb_ip_align(dev, hmp->rx_buf_sz); |
| hmp->rx_skbuff[i] = skb; |
| if (skb == NULL) |
| break; |
| |
| hmp->rx_ring[i].addr = cpu_to_leXX(dma_map_single(&hmp->pci_dev->dev, |
| skb->data, |
| hmp->rx_buf_sz, |
| DMA_FROM_DEVICE)); |
| hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn | |
| DescEndPacket | DescIntr | (hmp->rx_buf_sz - 2)); |
| } |
| hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE); |
| /* Mark the last entry as wrapping the ring. */ |
| hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing); |
| |
| /* Trigger an immediate transmit demand. */ |
| netif_trans_update(dev); /* prevent tx timeout */ |
| dev->stats.tx_errors++; |
| |
| /* Restart the chip's Tx/Rx processes . */ |
| writew(0x0002, ioaddr + TxCmd); /* STOP Tx */ |
| writew(0x0001, ioaddr + TxCmd); /* START Tx */ |
| writew(0x0001, ioaddr + RxCmd); /* START Rx */ |
| |
| netif_wake_queue(dev); |
| } |
| |
| |
| /* Initialize the Rx and Tx rings, along with various 'dev' bits. */ |
| static void hamachi_init_ring(struct net_device *dev) |
| { |
| struct hamachi_private *hmp = netdev_priv(dev); |
| int i; |
| |
| hmp->tx_full = 0; |
| hmp->cur_rx = hmp->cur_tx = 0; |
| hmp->dirty_rx = hmp->dirty_tx = 0; |
| |
| /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the |
| * card needs room to do 8 byte alignment, +2 so we can reserve |
| * the first 2 bytes, and +16 gets room for the status word from the |
| * card. -KDU |
| */ |
| hmp->rx_buf_sz = (dev->mtu <= 1492 ? PKT_BUF_SZ : |
| (((dev->mtu+26+7) & ~7) + 16)); |
| |
| /* Initialize all Rx descriptors. */ |
| for (i = 0; i < RX_RING_SIZE; i++) { |
| hmp->rx_ring[i].status_n_length = 0; |
| hmp->rx_skbuff[i] = NULL; |
| } |
| /* Fill in the Rx buffers. Handle allocation failure gracefully. */ |
| for (i = 0; i < RX_RING_SIZE; i++) { |
| struct sk_buff *skb = netdev_alloc_skb(dev, hmp->rx_buf_sz + 2); |
| hmp->rx_skbuff[i] = skb; |
| if (skb == NULL) |
| break; |
| skb_reserve(skb, 2); /* 16 byte align the IP header. */ |
| hmp->rx_ring[i].addr = cpu_to_leXX(dma_map_single(&hmp->pci_dev->dev, |
| skb->data, |
| hmp->rx_buf_sz, |
| DMA_FROM_DEVICE)); |
| /* -2 because it doesn't REALLY have that first 2 bytes -KDU */ |
| hmp->rx_ring[i].status_n_length = cpu_to_le32(DescOwn | |
| DescEndPacket | DescIntr | (hmp->rx_buf_sz -2)); |
| } |
| hmp->dirty_rx = (unsigned int)(i - RX_RING_SIZE); |
| hmp->rx_ring[RX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing); |
| |
| for (i = 0; i < TX_RING_SIZE; i++) { |
| hmp->tx_skbuff[i] = NULL; |
| hmp->tx_ring[i].status_n_length = 0; |
| } |
| /* Mark the last entry of the ring */ |
| hmp->tx_ring[TX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing); |
| } |
| |
| |
| static netdev_tx_t hamachi_start_xmit(struct sk_buff *skb, |
| struct net_device *dev) |
| { |
| struct hamachi_private *hmp = netdev_priv(dev); |
| unsigned entry; |
| u16 status; |
| |
| /* Ok, now make sure that the queue has space before trying to |
| add another skbuff. if we return non-zero the scheduler |
| should interpret this as a queue full and requeue the buffer |
| for later. |
| */ |
| if (hmp->tx_full) { |
| /* We should NEVER reach this point -KDU */ |
| printk(KERN_WARNING "%s: Hamachi transmit queue full at slot %d.\n",dev->name, hmp->cur_tx); |
| |
| /* Wake the potentially-idle transmit channel. */ |
| /* If we don't need to read status, DON'T -KDU */ |
| status=readw(hmp->base + TxStatus); |
| if( !(status & 0x0001) || (status & 0x0002)) |
| writew(0x0001, hmp->base + TxCmd); |
| return NETDEV_TX_BUSY; |
| } |
| |
| /* Caution: the write order is important here, set the field |
| with the "ownership" bits last. */ |
| |
| /* Calculate the next Tx descriptor entry. */ |
| entry = hmp->cur_tx % TX_RING_SIZE; |
| |
| hmp->tx_skbuff[entry] = skb; |
| |
| hmp->tx_ring[entry].addr = cpu_to_leXX(dma_map_single(&hmp->pci_dev->dev, |
| skb->data, |
| skb->len, |
| DMA_TO_DEVICE)); |
| |
| /* Hmmmm, could probably put a DescIntr on these, but the way |
| the driver is currently coded makes Tx interrupts unnecessary |
| since the clearing of the Tx ring is handled by the start_xmit |
| routine. This organization helps mitigate the interrupts a |
| bit and probably renders the max_tx_latency param useless. |
| |
| Update: Putting a DescIntr bit on all of the descriptors and |
| mitigating interrupt frequency with the tx_min_pkt parameter. -KDU |
| */ |
| if (entry >= TX_RING_SIZE-1) /* Wrap ring */ |
| hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn | |
| DescEndPacket | DescEndRing | DescIntr | skb->len); |
| else |
| hmp->tx_ring[entry].status_n_length = cpu_to_le32(DescOwn | |
| DescEndPacket | DescIntr | skb->len); |
| hmp->cur_tx++; |
| |
| /* Non-x86 Todo: explicitly flush cache lines here. */ |
| |
| /* Wake the potentially-idle transmit channel. */ |
| /* If we don't need to read status, DON'T -KDU */ |
| status=readw(hmp->base + TxStatus); |
| if( !(status & 0x0001) || (status & 0x0002)) |
| writew(0x0001, hmp->base + TxCmd); |
| |
| /* Immediately before returning, let's clear as many entries as we can. */ |
| hamachi_tx(dev); |
| |
| /* We should kick the bottom half here, since we are not accepting |
| * interrupts with every packet. i.e. realize that Gigabit ethernet |
| * can transmit faster than ordinary machines can load packets; |
| * hence, any packet that got put off because we were in the transmit |
| * routine should IMMEDIATELY get a chance to be re-queued. -KDU |
| */ |
| if ((hmp->cur_tx - hmp->dirty_tx) < (TX_RING_SIZE - 4)) |
| netif_wake_queue(dev); /* Typical path */ |
| else { |
| hmp->tx_full = 1; |
| netif_stop_queue(dev); |
| } |
| |
| if (hamachi_debug > 4) { |
| printk(KERN_DEBUG "%s: Hamachi transmit frame #%d queued in slot %d.\n", |
| dev->name, hmp->cur_tx, entry); |
| } |
| return NETDEV_TX_OK; |
| } |
| |
| /* The interrupt handler does all of the Rx thread work and cleans up |
| after the Tx thread. */ |
| static irqreturn_t hamachi_interrupt(int irq, void *dev_instance) |
| { |
| struct net_device *dev = dev_instance; |
| struct hamachi_private *hmp = netdev_priv(dev); |
| void __iomem *ioaddr = hmp->base; |
| long boguscnt = max_interrupt_work; |
| int handled = 0; |
| |
| #ifndef final_version /* Can never occur. */ |
| if (dev == NULL) { |
| printk (KERN_ERR "hamachi_interrupt(): irq %d for unknown device.\n", irq); |
| return IRQ_NONE; |
| } |
| #endif |
| |
| spin_lock(&hmp->lock); |
| |
| do { |
| u32 intr_status = readl(ioaddr + InterruptClear); |
| |
| if (hamachi_debug > 4) |
| printk(KERN_DEBUG "%s: Hamachi interrupt, status %4.4x.\n", |
| dev->name, intr_status); |
| |
| if (intr_status == 0) |
| break; |
| |
| handled = 1; |
| |
| if (intr_status & IntrRxDone) |
| hamachi_rx(dev); |
| |
| if (intr_status & IntrTxDone){ |
| /* This code should RARELY need to execute. After all, this is |
| * a gigabit link, it should consume packets as fast as we put |
| * them in AND we clear the Tx ring in hamachi_start_xmit(). |
| */ |
| if (hmp->tx_full){ |
| for (; hmp->cur_tx - hmp->dirty_tx > 0; hmp->dirty_tx++){ |
| int entry = hmp->dirty_tx % TX_RING_SIZE; |
| struct sk_buff *skb; |
| |
| if (hmp->tx_ring[entry].status_n_length & cpu_to_le32(DescOwn)) |
| break; |
| skb = hmp->tx_skbuff[entry]; |
| /* Free the original skb. */ |
| if (skb){ |
| dma_unmap_single(&hmp->pci_dev->dev, |
| leXX_to_cpu(hmp->tx_ring[entry].addr), |
| skb->len, |
| DMA_TO_DEVICE); |
| dev_consume_skb_irq(skb); |
| hmp->tx_skbuff[entry] = NULL; |
| } |
| hmp->tx_ring[entry].status_n_length = 0; |
| if (entry >= TX_RING_SIZE-1) |
| hmp->tx_ring[TX_RING_SIZE-1].status_n_length |= |
| cpu_to_le32(DescEndRing); |
| dev->stats.tx_packets++; |
| } |
| if (hmp->cur_tx - hmp->dirty_tx < TX_RING_SIZE - 4){ |
| /* The ring is no longer full */ |
| hmp->tx_full = 0; |
| netif_wake_queue(dev); |
| } |
| } else { |
| netif_wake_queue(dev); |
| } |
| } |
| |
| |
| /* Abnormal error summary/uncommon events handlers. */ |
| if (intr_status & |
| (IntrTxPCIFault | IntrTxPCIErr | IntrRxPCIFault | IntrRxPCIErr | |
| LinkChange | NegotiationChange | StatsMax)) |
| hamachi_error(dev, intr_status); |
| |
| if (--boguscnt < 0) { |
| printk(KERN_WARNING "%s: Too much work at interrupt, status=0x%4.4x.\n", |
| dev->name, intr_status); |
| break; |
| } |
| } while (1); |
| |
| if (hamachi_debug > 3) |
| printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n", |
| dev->name, readl(ioaddr + IntrStatus)); |
| |
| #ifndef final_version |
| /* Code that should never be run! Perhaps remove after testing.. */ |
| { |
| static int stopit = 10; |
| if (dev->start == 0 && --stopit < 0) { |
| printk(KERN_ERR "%s: Emergency stop, looping startup interrupt.\n", |
| dev->name); |
| free_irq(irq, dev); |
| } |
| } |
| #endif |
| |
| spin_unlock(&hmp->lock); |
| return IRQ_RETVAL(handled); |
| } |
| |
| /* This routine is logically part of the interrupt handler, but separated |
| for clarity and better register allocation. */ |
| static int hamachi_rx(struct net_device *dev) |
| { |
| struct hamachi_private *hmp = netdev_priv(dev); |
| int entry = hmp->cur_rx % RX_RING_SIZE; |
| int boguscnt = (hmp->dirty_rx + RX_RING_SIZE) - hmp->cur_rx; |
| |
| if (hamachi_debug > 4) { |
| printk(KERN_DEBUG " In hamachi_rx(), entry %d status %4.4x.\n", |
| entry, hmp->rx_ring[entry].status_n_length); |
| } |
| |
| /* If EOP is set on the next entry, it's a new packet. Send it up. */ |
| while (1) { |
| struct hamachi_desc *desc = &(hmp->rx_ring[entry]); |
| u32 desc_status = le32_to_cpu(desc->status_n_length); |
| u16 data_size = desc_status; /* Implicit truncate */ |
| u8 *buf_addr; |
| s32 frame_status; |
| |
| if (desc_status & DescOwn) |
| break; |
| dma_sync_single_for_cpu(&hmp->pci_dev->dev, |
| leXX_to_cpu(desc->addr), |
| hmp->rx_buf_sz, DMA_FROM_DEVICE); |
| buf_addr = (u8 *) hmp->rx_skbuff[entry]->data; |
| frame_status = get_unaligned_le32(&(buf_addr[data_size - 12])); |
| if (hamachi_debug > 4) |
| printk(KERN_DEBUG " hamachi_rx() status was %8.8x.\n", |
| frame_status); |
| if (--boguscnt < 0) |
| break; |
| if ( ! (desc_status & DescEndPacket)) { |
| printk(KERN_WARNING "%s: Oversized Ethernet frame spanned " |
| "multiple buffers, entry %#x length %d status %4.4x!\n", |
| dev->name, hmp->cur_rx, data_size, desc_status); |
| printk(KERN_WARNING "%s: Oversized Ethernet frame %p vs %p.\n", |
| dev->name, desc, &hmp->rx_ring[hmp->cur_rx % RX_RING_SIZE]); |
| printk(KERN_WARNING "%s: Oversized Ethernet frame -- next status %x/%x last status %x.\n", |
| dev->name, |
| le32_to_cpu(hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length) & 0xffff0000, |
| le32_to_cpu(hmp->rx_ring[(hmp->cur_rx+1) % RX_RING_SIZE].status_n_length) & 0x0000ffff, |
| le32_to_cpu(hmp->rx_ring[(hmp->cur_rx-1) % RX_RING_SIZE].status_n_length)); |
| dev->stats.rx_length_errors++; |
| } /* else Omit for prototype errata??? */ |
| if (frame_status & 0x00380000) { |
| /* There was an error. */ |
| if (hamachi_debug > 2) |
| printk(KERN_DEBUG " hamachi_rx() Rx error was %8.8x.\n", |
| frame_status); |
| dev->stats.rx_errors++; |
| if (frame_status & 0x00600000) |
| dev->stats.rx_length_errors++; |
| if (frame_status & 0x00080000) |
| dev->stats.rx_frame_errors++; |
| if (frame_status & 0x00100000) |
| dev->stats.rx_crc_errors++; |
| if (frame_status < 0) |
| dev->stats.rx_dropped++; |
| } else { |
| struct sk_buff *skb; |
| /* Omit CRC */ |
| u16 pkt_len = (frame_status & 0x07ff) - 4; |
| #ifdef RX_CHECKSUM |
| u32 pfck = *(u32 *) &buf_addr[data_size - 8]; |
| #endif |
| |
| |
| #ifndef final_version |
| if (hamachi_debug > 4) |
| printk(KERN_DEBUG " hamachi_rx() normal Rx pkt length %d" |
| " of %d, bogus_cnt %d.\n", |
| pkt_len, data_size, boguscnt); |
| if (hamachi_debug > 5) |
| printk(KERN_DEBUG"%s: rx status %8.8x %8.8x %8.8x %8.8x %8.8x.\n", |
| dev->name, |
| *(s32*)&(buf_addr[data_size - 20]), |
| *(s32*)&(buf_addr[data_size - 16]), |
| *(s32*)&(buf_addr[data_size - 12]), |
| *(s32*)&(buf_addr[data_size - 8]), |
| *(s32*)&(buf_addr[data_size - 4])); |
| #endif |
| /* Check if the packet is long enough to accept without copying |
| to a minimally-sized skbuff. */ |
| if (pkt_len < rx_copybreak && |
| (skb = netdev_alloc_skb(dev, pkt_len + 2)) != NULL) { |
| #ifdef RX_CHECKSUM |
| printk(KERN_ERR "%s: rx_copybreak non-zero " |
| "not good with RX_CHECKSUM\n", dev->name); |
| #endif |
| skb_reserve(skb, 2); /* 16 byte align the IP header */ |
| dma_sync_single_for_cpu(&hmp->pci_dev->dev, |
| leXX_to_cpu(hmp->rx_ring[entry].addr), |
| hmp->rx_buf_sz, |
| DMA_FROM_DEVICE); |
| /* Call copy + cksum if available. */ |
| #if 1 || USE_IP_COPYSUM |
| skb_copy_to_linear_data(skb, |
| hmp->rx_skbuff[entry]->data, pkt_len); |
| skb_put(skb, pkt_len); |
| #else |
| skb_put_data(skb, hmp->rx_ring_dma |
| + entry*sizeof(*desc), pkt_len); |
| #endif |
| dma_sync_single_for_device(&hmp->pci_dev->dev, |
| leXX_to_cpu(hmp->rx_ring[entry].addr), |
| hmp->rx_buf_sz, |
| DMA_FROM_DEVICE); |
| } else { |
| dma_unmap_single(&hmp->pci_dev->dev, |
| leXX_to_cpu(hmp->rx_ring[entry].addr), |
| hmp->rx_buf_sz, |
| DMA_FROM_DEVICE); |
| skb_put(skb = hmp->rx_skbuff[entry], pkt_len); |
| hmp->rx_skbuff[entry] = NULL; |
| } |
| skb->protocol = eth_type_trans(skb, dev); |
| |
| |
| #ifdef RX_CHECKSUM |
| /* TCP or UDP on ipv4, DIX encoding */ |
| if (pfck>>24 == 0x91 || pfck>>24 == 0x51) { |
| struct iphdr *ih = (struct iphdr *) skb->data; |
| /* Check that IP packet is at least 46 bytes, otherwise, |
| * there may be pad bytes included in the hardware checksum. |
| * This wouldn't happen if everyone padded with 0. |
| */ |
| if (ntohs(ih->tot_len) >= 46){ |
| /* don't worry about frags */ |
| if (!(ih->frag_off & cpu_to_be16(IP_MF|IP_OFFSET))) { |
| u32 inv = *(u32 *) &buf_addr[data_size - 16]; |
| u32 *p = (u32 *) &buf_addr[data_size - 20]; |
| register u32 crc, p_r, p_r1; |
| |
| if (inv & 4) { |
| inv &= ~4; |
| --p; |
| } |
| p_r = *p; |
| p_r1 = *(p-1); |
| switch (inv) { |
| case 0: |
| crc = (p_r & 0xffff) + (p_r >> 16); |
| break; |
| case 1: |
| crc = (p_r >> 16) + (p_r & 0xffff) |
| + (p_r1 >> 16 & 0xff00); |
| break; |
| case 2: |
| crc = p_r + (p_r1 >> 16); |
| break; |
| case 3: |
| crc = p_r + (p_r1 & 0xff00) + (p_r1 >> 16); |
| break; |
| default: /*NOTREACHED*/ crc = 0; |
| } |
| if (crc & 0xffff0000) { |
| crc &= 0xffff; |
| ++crc; |
| } |
| /* tcp/udp will add in pseudo */ |
| skb->csum = ntohs(pfck & 0xffff); |
| if (skb->csum > crc) |
| skb->csum -= crc; |
| else |
| skb->csum += (~crc & 0xffff); |
| /* |
| * could do the pseudo myself and return |
| * CHECKSUM_UNNECESSARY |
| */ |
| skb->ip_summed = CHECKSUM_COMPLETE; |
| } |
| } |
| } |
| #endif /* RX_CHECKSUM */ |
| |
| netif_rx(skb); |
| dev->stats.rx_packets++; |
| } |
| entry = (++hmp->cur_rx) % RX_RING_SIZE; |
| } |
| |
| /* Refill the Rx ring buffers. */ |
| for (; hmp->cur_rx - hmp->dirty_rx > 0; hmp->dirty_rx++) { |
| struct hamachi_desc *desc; |
| |
| entry = hmp->dirty_rx % RX_RING_SIZE; |
| desc = &(hmp->rx_ring[entry]); |
| if (hmp->rx_skbuff[entry] == NULL) { |
| struct sk_buff *skb = netdev_alloc_skb(dev, hmp->rx_buf_sz + 2); |
| |
| hmp->rx_skbuff[entry] = skb; |
| if (skb == NULL) |
| break; /* Better luck next round. */ |
| skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ |
| desc->addr = cpu_to_leXX(dma_map_single(&hmp->pci_dev->dev, |
| skb->data, |
| hmp->rx_buf_sz, |
| DMA_FROM_DEVICE)); |
| } |
| desc->status_n_length = cpu_to_le32(hmp->rx_buf_sz); |
| if (entry >= RX_RING_SIZE-1) |
| desc->status_n_length |= cpu_to_le32(DescOwn | |
| DescEndPacket | DescEndRing | DescIntr); |
| else |
| desc->status_n_length |= cpu_to_le32(DescOwn | |
| DescEndPacket | DescIntr); |
| } |
| |
| /* Restart Rx engine if stopped. */ |
| /* If we don't need to check status, don't. -KDU */ |
| if (readw(hmp->base + RxStatus) & 0x0002) |
| writew(0x0001, hmp->base + RxCmd); |
| |
| return 0; |
| } |
| |
| /* This is more properly named "uncommon interrupt events", as it covers more |
| than just errors. */ |
| static void hamachi_error(struct net_device *dev, int intr_status) |
| { |
| struct hamachi_private *hmp = netdev_priv(dev); |
| void __iomem *ioaddr = hmp->base; |
| |
| if (intr_status & (LinkChange|NegotiationChange)) { |
| if (hamachi_debug > 1) |
| printk(KERN_INFO "%s: Link changed: AutoNegotiation Ctrl" |
| " %4.4x, Status %4.4x %4.4x Intr status %4.4x.\n", |
| dev->name, readw(ioaddr + 0x0E0), readw(ioaddr + 0x0E2), |
| readw(ioaddr + ANLinkPartnerAbility), |
| readl(ioaddr + IntrStatus)); |
| if (readw(ioaddr + ANStatus) & 0x20) |
| writeb(0x01, ioaddr + LEDCtrl); |
| else |
| writeb(0x03, ioaddr + LEDCtrl); |
| } |
| if (intr_status & StatsMax) { |
| hamachi_get_stats(dev); |
| /* Read the overflow bits to clear. */ |
| readl(ioaddr + 0x370); |
| readl(ioaddr + 0x3F0); |
| } |
| if ((intr_status & ~(LinkChange|StatsMax|NegotiationChange|IntrRxDone|IntrTxDone)) && |
| hamachi_debug) |
| printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n", |
| dev->name, intr_status); |
| /* Hmmmmm, it's not clear how to recover from PCI faults. */ |
| if (intr_status & (IntrTxPCIErr | IntrTxPCIFault)) |
| dev->stats.tx_fifo_errors++; |
| if (intr_status & (IntrRxPCIErr | IntrRxPCIFault)) |
| dev->stats.rx_fifo_errors++; |
| } |
| |
| static int hamachi_close(struct net_device *dev) |
| { |
| struct hamachi_private *hmp = netdev_priv(dev); |
| void __iomem *ioaddr = hmp->base; |
| struct sk_buff *skb; |
| int i; |
| |
| netif_stop_queue(dev); |
| |
| if (hamachi_debug > 1) { |
| printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %4.4x Rx %4.4x Int %2.2x.\n", |
| dev->name, readw(ioaddr + TxStatus), |
| readw(ioaddr + RxStatus), readl(ioaddr + IntrStatus)); |
| printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n", |
| dev->name, hmp->cur_tx, hmp->dirty_tx, hmp->cur_rx, hmp->dirty_rx); |
| } |
| |
| /* Disable interrupts by clearing the interrupt mask. */ |
| writel(0x0000, ioaddr + InterruptEnable); |
| |
| /* Stop the chip's Tx and Rx processes. */ |
| writel(2, ioaddr + RxCmd); |
| writew(2, ioaddr + TxCmd); |
| |
| #ifdef __i386__ |
| if (hamachi_debug > 2) { |
| printk(KERN_DEBUG " Tx ring at %8.8x:\n", |
| (int)hmp->tx_ring_dma); |
| for (i = 0; i < TX_RING_SIZE; i++) |
| printk(KERN_DEBUG " %c #%d desc. %8.8x %8.8x.\n", |
| readl(ioaddr + TxCurPtr) == (long)&hmp->tx_ring[i] ? '>' : ' ', |
| i, hmp->tx_ring[i].status_n_length, hmp->tx_ring[i].addr); |
| printk(KERN_DEBUG " Rx ring %8.8x:\n", |
| (int)hmp->rx_ring_dma); |
| for (i = 0; i < RX_RING_SIZE; i++) { |
| printk(KERN_DEBUG " %c #%d desc. %4.4x %8.8x\n", |
| readl(ioaddr + RxCurPtr) == (long)&hmp->rx_ring[i] ? '>' : ' ', |
| i, hmp->rx_ring[i].status_n_length, hmp->rx_ring[i].addr); |
| if (hamachi_debug > 6) { |
| if (*(u8*)hmp->rx_skbuff[i]->data != 0x69) { |
| u16 *addr = (u16 *) |
| hmp->rx_skbuff[i]->data; |
| int j; |
| printk(KERN_DEBUG "Addr: "); |
| for (j = 0; j < 0x50; j++) |
| printk(" %4.4x", addr[j]); |
| printk("\n"); |
| } |
| } |
| } |
| } |
| #endif /* __i386__ debugging only */ |
| |
| free_irq(hmp->pci_dev->irq, dev); |
| |
| del_timer_sync(&hmp->timer); |
| |
| /* Free all the skbuffs in the Rx queue. */ |
| for (i = 0; i < RX_RING_SIZE; i++) { |
| skb = hmp->rx_skbuff[i]; |
| hmp->rx_ring[i].status_n_length = 0; |
| if (skb) { |
| dma_unmap_single(&hmp->pci_dev->dev, |
| leXX_to_cpu(hmp->rx_ring[i].addr), |
| hmp->rx_buf_sz, DMA_FROM_DEVICE); |
| dev_kfree_skb(skb); |
| hmp->rx_skbuff[i] = NULL; |
| } |
| hmp->rx_ring[i].addr = cpu_to_leXX(0xBADF00D0); /* An invalid address. */ |
| } |
| for (i = 0; i < TX_RING_SIZE; i++) { |
| skb = hmp->tx_skbuff[i]; |
| if (skb) { |
| dma_unmap_single(&hmp->pci_dev->dev, |
| leXX_to_cpu(hmp->tx_ring[i].addr), |
| skb->len, DMA_TO_DEVICE); |
| dev_kfree_skb(skb); |
| hmp->tx_skbuff[i] = NULL; |
| } |
| } |
| |
| writeb(0x00, ioaddr + LEDCtrl); |
| |
| return 0; |
| } |
| |
| static struct net_device_stats *hamachi_get_stats(struct net_device *dev) |
| { |
| struct hamachi_private *hmp = netdev_priv(dev); |
| void __iomem *ioaddr = hmp->base; |
| |
| /* We should lock this segment of code for SMP eventually, although |
| the vulnerability window is very small and statistics are |
| non-critical. */ |
| /* Ok, what goes here? This appears to be stuck at 21 packets |
| according to ifconfig. It does get incremented in hamachi_tx(), |
| so I think I'll comment it out here and see if better things |
| happen. |
| */ |
| /* dev->stats.tx_packets = readl(ioaddr + 0x000); */ |
| |
| /* Total Uni+Brd+Multi */ |
| dev->stats.rx_bytes = readl(ioaddr + 0x330); |
| /* Total Uni+Brd+Multi */ |
| dev->stats.tx_bytes = readl(ioaddr + 0x3B0); |
| /* Multicast Rx */ |
| dev->stats.multicast = readl(ioaddr + 0x320); |
| |
| /* Over+Undersized */ |
| dev->stats.rx_length_errors = readl(ioaddr + 0x368); |
| /* Jabber */ |
| dev->stats.rx_over_errors = readl(ioaddr + 0x35C); |
| /* Jabber */ |
| dev->stats.rx_crc_errors = readl(ioaddr + 0x360); |
| /* Symbol Errs */ |
| dev->stats.rx_frame_errors = readl(ioaddr + 0x364); |
| /* Dropped */ |
| dev->stats.rx_missed_errors = readl(ioaddr + 0x36C); |
| |
| return &dev->stats; |
| } |
| |
| static void set_rx_mode(struct net_device *dev) |
| { |
| struct hamachi_private *hmp = netdev_priv(dev); |
| void __iomem *ioaddr = hmp->base; |
| |
| if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ |
| writew(0x000F, ioaddr + AddrMode); |
| } else if ((netdev_mc_count(dev) > 63) || (dev->flags & IFF_ALLMULTI)) { |
| /* Too many to match, or accept all multicasts. */ |
| writew(0x000B, ioaddr + AddrMode); |
| } else if (!netdev_mc_empty(dev)) { /* Must use the CAM filter. */ |
| struct netdev_hw_addr *ha; |
| int i = 0; |
| |
| netdev_for_each_mc_addr(ha, dev) { |
| writel(*(u32 *)(ha->addr), ioaddr + 0x100 + i*8); |
| writel(0x20000 | (*(u16 *)&ha->addr[4]), |
| ioaddr + 0x104 + i*8); |
| i++; |
| } |
| /* Clear remaining entries. */ |
| for (; i < 64; i++) |
| writel(0, ioaddr + 0x104 + i*8); |
| writew(0x0003, ioaddr + AddrMode); |
| } else { /* Normal, unicast/broadcast-only mode. */ |
| writew(0x0001, ioaddr + AddrMode); |
| } |
| } |
| |
| static int check_if_running(struct net_device *dev) |
| { |
| if (!netif_running(dev)) |
| return -EINVAL; |
| return 0; |
| } |
| |
| static void hamachi_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) |
| { |
| struct hamachi_private *np = netdev_priv(dev); |
| |
| strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); |
| strlcpy(info->version, DRV_VERSION, sizeof(info->version)); |
| strlcpy(info->bus_info, pci_name(np->pci_dev), sizeof(info->bus_info)); |
| } |
| |
| static int hamachi_get_link_ksettings(struct net_device *dev, |
| struct ethtool_link_ksettings *cmd) |
| { |
| struct hamachi_private *np = netdev_priv(dev); |
| spin_lock_irq(&np->lock); |
| mii_ethtool_get_link_ksettings(&np->mii_if, cmd); |
| spin_unlock_irq(&np->lock); |
| return 0; |
| } |
| |
| static int hamachi_set_link_ksettings(struct net_device *dev, |
| const struct ethtool_link_ksettings *cmd) |
| { |
| struct hamachi_private *np = netdev_priv(dev); |
| int res; |
| spin_lock_irq(&np->lock); |
| res = mii_ethtool_set_link_ksettings(&np->mii_if, cmd); |
| spin_unlock_irq(&np->lock); |
| return res; |
| } |
| |
| static int hamachi_nway_reset(struct net_device *dev) |
| { |
| struct hamachi_private *np = netdev_priv(dev); |
| return mii_nway_restart(&np->mii_if); |
| } |
| |
| static u32 hamachi_get_link(struct net_device *dev) |
| { |
| struct hamachi_private *np = netdev_priv(dev); |
| return mii_link_ok(&np->mii_if); |
| } |
| |
| static const struct ethtool_ops ethtool_ops = { |
| .begin = check_if_running, |
| .get_drvinfo = hamachi_get_drvinfo, |
| .nway_reset = hamachi_nway_reset, |
| .get_link = hamachi_get_link, |
| .get_link_ksettings = hamachi_get_link_ksettings, |
| .set_link_ksettings = hamachi_set_link_ksettings, |
| }; |
| |
| static const struct ethtool_ops ethtool_ops_no_mii = { |
| .begin = check_if_running, |
| .get_drvinfo = hamachi_get_drvinfo, |
| }; |
| |
| /* private ioctl: set rx,tx intr params */ |
| static int hamachi_siocdevprivate(struct net_device *dev, struct ifreq *rq, |
| void __user *data, int cmd) |
| { |
| struct hamachi_private *np = netdev_priv(dev); |
| u32 *d = (u32 *)&rq->ifr_ifru; |
| |
| if (!netif_running(dev)) |
| return -EINVAL; |
| |
| if (cmd != SIOCDEVPRIVATE + 3) |
| return -EOPNOTSUPP; |
| |
| /* Should add this check here or an ordinary user can do nasty |
| * things. -KDU |
| * |
| * TODO: Shut down the Rx and Tx engines while doing this. |
| */ |
| if (!capable(CAP_NET_ADMIN)) |
| return -EPERM; |
| writel(d[0], np->base + TxIntrCtrl); |
| writel(d[1], np->base + RxIntrCtrl); |
| printk(KERN_NOTICE "%s: tx %08x, rx %08x intr\n", dev->name, |
| (u32)readl(np->base + TxIntrCtrl), |
| (u32)readl(np->base + RxIntrCtrl)); |
| |
| return 0; |
| } |
| |
| static int hamachi_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
| { |
| struct hamachi_private *np = netdev_priv(dev); |
| struct mii_ioctl_data *data = if_mii(rq); |
| int rc; |
| |
| if (!netif_running(dev)) |
| return -EINVAL; |
| |
| spin_lock_irq(&np->lock); |
| rc = generic_mii_ioctl(&np->mii_if, data, cmd, NULL); |
| spin_unlock_irq(&np->lock); |
| |
| return rc; |
| } |
| |
| |
| static void hamachi_remove_one(struct pci_dev *pdev) |
| { |
| struct net_device *dev = pci_get_drvdata(pdev); |
| |
| if (dev) { |
| struct hamachi_private *hmp = netdev_priv(dev); |
| |
| dma_free_coherent(&pdev->dev, RX_TOTAL_SIZE, hmp->rx_ring, |
| hmp->rx_ring_dma); |
| dma_free_coherent(&pdev->dev, TX_TOTAL_SIZE, hmp->tx_ring, |
| hmp->tx_ring_dma); |
| unregister_netdev(dev); |
| iounmap(hmp->base); |
| free_netdev(dev); |
| pci_release_regions(pdev); |
| } |
| } |
| |
| static const struct pci_device_id hamachi_pci_tbl[] = { |
| { 0x1318, 0x0911, PCI_ANY_ID, PCI_ANY_ID, }, |
| { 0, } |
| }; |
| MODULE_DEVICE_TABLE(pci, hamachi_pci_tbl); |
| |
| static struct pci_driver hamachi_driver = { |
| .name = DRV_NAME, |
| .id_table = hamachi_pci_tbl, |
| .probe = hamachi_init_one, |
| .remove = hamachi_remove_one, |
| }; |
| |
| static int __init hamachi_init (void) |
| { |
| /* when a module, this is printed whether or not devices are found in probe */ |
| #ifdef MODULE |
| printk(version); |
| #endif |
| return pci_register_driver(&hamachi_driver); |
| } |
| |
| static void __exit hamachi_exit (void) |
| { |
| pci_unregister_driver(&hamachi_driver); |
| } |
| |
| |
| module_init(hamachi_init); |
| module_exit(hamachi_exit); |