Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* lance.c: An AMD LANCE/PCnet ethernet driver for Linux. */ |
| 2 | /* |
| 3 | Written/copyright 1993-1998 by Donald Becker. |
| 4 | |
| 5 | Copyright 1993 United States Government as represented by the |
| 6 | Director, National Security Agency. |
| 7 | This software may be used and distributed according to the terms |
| 8 | of the GNU General Public License, incorporated herein by reference. |
| 9 | |
| 10 | This driver is for the Allied Telesis AT1500 and HP J2405A, and should work |
| 11 | with most other LANCE-based bus-master (NE2100/NE2500) ethercards. |
| 12 | |
| 13 | The author may be reached as becker@scyld.com, or C/O |
| 14 | Scyld Computing Corporation |
| 15 | 410 Severn Ave., Suite 210 |
| 16 | Annapolis MD 21403 |
| 17 | |
| 18 | Andrey V. Savochkin: |
| 19 | - alignment problem with 1.3.* kernel and some minor changes. |
| 20 | Thomas Bogendoerfer (tsbogend@bigbug.franken.de): |
| 21 | - added support for Linux/Alpha, but removed most of it, because |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 22 | it worked only for the PCI chip. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | - added hook for the 32bit lance driver |
| 24 | - added PCnetPCI II (79C970A) to chip table |
| 25 | Paul Gortmaker (gpg109@rsphy1.anu.edu.au): |
| 26 | - hopefully fix above so Linux/Alpha can use ISA cards too. |
| 27 | 8/20/96 Fixed 7990 autoIRQ failure and reversed unneeded alignment -djb |
| 28 | v1.12 10/27/97 Module support -djb |
| 29 | v1.14 2/3/98 Module support modified, made PCI support optional -djb |
| 30 | v1.15 5/27/99 Fixed bug in the cleanup_module(). dev->priv was freed |
| 31 | before unregister_netdev() which caused NULL pointer |
| 32 | reference later in the chain (in rtnetlink_fill_ifinfo()) |
| 33 | -- Mika Kuoppala <miku@iki.fi> |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | Forward ported v1.14 to 2.1.129, merged the PCI and misc changes from |
| 36 | the 2.1 version of the old driver - Alan Cox |
| 37 | |
| 38 | Get rid of check_region, check kmalloc return in lance_probe1 |
| 39 | Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 11/01/2001 |
| 40 | |
| 41 | Reworked detection, added support for Racal InterLan EtherBlaster cards |
| 42 | Vesselin Kostadinov <vesok at yahoo dot com > - 22/4/2004 |
| 43 | */ |
| 44 | |
Andy Gospodarek | d5b2069 | 2006-09-11 17:39:18 -0400 | [diff] [blame] | 45 | static const char version[] = "lance.c:v1.16 2006/11/09 dplatt@3do.com, becker@cesdis.gsfc.nasa.gov\n"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
| 47 | #include <linux/module.h> |
| 48 | #include <linux/kernel.h> |
| 49 | #include <linux/string.h> |
| 50 | #include <linux/delay.h> |
| 51 | #include <linux/errno.h> |
| 52 | #include <linux/ioport.h> |
| 53 | #include <linux/slab.h> |
| 54 | #include <linux/interrupt.h> |
| 55 | #include <linux/pci.h> |
| 56 | #include <linux/init.h> |
| 57 | #include <linux/netdevice.h> |
| 58 | #include <linux/etherdevice.h> |
| 59 | #include <linux/skbuff.h> |
Al Viro | d7fe0f2 | 2006-12-03 23:15:30 -0500 | [diff] [blame] | 60 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <linux/bitops.h> |
| 62 | |
| 63 | #include <asm/io.h> |
| 64 | #include <asm/dma.h> |
| 65 | |
| 66 | static unsigned int lance_portlist[] __initdata = { 0x300, 0x320, 0x340, 0x360, 0}; |
| 67 | static int lance_probe1(struct net_device *dev, int ioaddr, int irq, int options); |
| 68 | static int __init do_lance_probe(struct net_device *dev); |
| 69 | |
| 70 | |
| 71 | static struct card { |
| 72 | char id_offset14; |
| 73 | char id_offset15; |
| 74 | } cards[] = { |
| 75 | { //"normal" |
| 76 | .id_offset14 = 0x57, |
| 77 | .id_offset15 = 0x57, |
| 78 | }, |
| 79 | { //NI6510EB |
| 80 | .id_offset14 = 0x52, |
| 81 | .id_offset15 = 0x44, |
| 82 | }, |
| 83 | { //Racal InterLan EtherBlaster |
| 84 | .id_offset14 = 0x52, |
| 85 | .id_offset15 = 0x49, |
| 86 | }, |
| 87 | }; |
| 88 | #define NUM_CARDS 3 |
| 89 | |
| 90 | #ifdef LANCE_DEBUG |
| 91 | static int lance_debug = LANCE_DEBUG; |
| 92 | #else |
| 93 | static int lance_debug = 1; |
| 94 | #endif |
| 95 | |
| 96 | /* |
| 97 | Theory of Operation |
| 98 | |
| 99 | I. Board Compatibility |
| 100 | |
| 101 | This device driver is designed for the AMD 79C960, the "PCnet-ISA |
| 102 | single-chip ethernet controller for ISA". This chip is used in a wide |
| 103 | variety of boards from vendors such as Allied Telesis, HP, Kingston, |
| 104 | and Boca. This driver is also intended to work with older AMD 7990 |
| 105 | designs, such as the NE1500 and NE2100, and newer 79C961. For convenience, |
| 106 | I use the name LANCE to refer to all of the AMD chips, even though it properly |
| 107 | refers only to the original 7990. |
| 108 | |
| 109 | II. Board-specific settings |
| 110 | |
| 111 | The driver is designed to work the boards that use the faster |
| 112 | bus-master mode, rather than in shared memory mode. (Only older designs |
| 113 | have on-board buffer memory needed to support the slower shared memory mode.) |
| 114 | |
| 115 | Most ISA boards have jumpered settings for the I/O base, IRQ line, and DMA |
| 116 | channel. This driver probes the likely base addresses: |
| 117 | {0x300, 0x320, 0x340, 0x360}. |
| 118 | After the board is found it generates a DMA-timeout interrupt and uses |
| 119 | autoIRQ to find the IRQ line. The DMA channel can be set with the low bits |
| 120 | of the otherwise-unused dev->mem_start value (aka PARAM1). If unset it is |
| 121 | probed for by enabling each free DMA channel in turn and checking if |
| 122 | initialization succeeds. |
| 123 | |
| 124 | The HP-J2405A board is an exception: with this board it is easy to read the |
| 125 | EEPROM-set values for the base, IRQ, and DMA. (Of course you must already |
| 126 | _know_ the base address -- that field is for writing the EEPROM.) |
| 127 | |
| 128 | III. Driver operation |
| 129 | |
| 130 | IIIa. Ring buffers |
| 131 | The LANCE uses ring buffers of Tx and Rx descriptors. Each entry describes |
| 132 | the base and length of the data buffer, along with status bits. The length |
| 133 | of these buffers is set by LANCE_LOG_{RX,TX}_BUFFERS, which is log_2() of |
| 134 | the buffer length (rather than being directly the buffer length) for |
| 135 | implementation ease. The current values are 2 (Tx) and 4 (Rx), which leads to |
| 136 | ring sizes of 4 (Tx) and 16 (Rx). Increasing the number of ring entries |
| 137 | needlessly uses extra space and reduces the chance that an upper layer will |
| 138 | be able to reorder queued Tx packets based on priority. Decreasing the number |
| 139 | of entries makes it more difficult to achieve back-to-back packet transmission |
| 140 | and increases the chance that Rx ring will overflow. (Consider the worst case |
| 141 | of receiving back-to-back minimum-sized packets.) |
| 142 | |
| 143 | The LANCE has the capability to "chain" both Rx and Tx buffers, but this driver |
| 144 | statically allocates full-sized (slightly oversized -- PKT_BUF_SZ) buffers to |
| 145 | avoid the administrative overhead. For the Rx side this avoids dynamically |
| 146 | allocating full-sized buffers "just in case", at the expense of a |
| 147 | memory-to-memory data copy for each packet received. For most systems this |
| 148 | is a good tradeoff: the Rx buffer will always be in low memory, the copy |
| 149 | is inexpensive, and it primes the cache for later packet processing. For Tx |
| 150 | the buffers are only used when needed as low-memory bounce buffers. |
| 151 | |
| 152 | IIIB. 16M memory limitations. |
| 153 | For the ISA bus master mode all structures used directly by the LANCE, |
| 154 | the initialization block, Rx and Tx rings, and data buffers, must be |
| 155 | accessible from the ISA bus, i.e. in the lower 16M of real memory. |
| 156 | This is a problem for current Linux kernels on >16M machines. The network |
| 157 | devices are initialized after memory initialization, and the kernel doles out |
| 158 | memory from the top of memory downward. The current solution is to have a |
| 159 | special network initialization routine that's called before memory |
| 160 | initialization; this will eventually be generalized for all network devices. |
| 161 | As mentioned before, low-memory "bounce-buffers" are used when needed. |
| 162 | |
| 163 | IIIC. Synchronization |
| 164 | The driver runs as two independent, single-threaded flows of control. One |
| 165 | is the send-packet routine, which enforces single-threaded use by the |
| 166 | dev->tbusy flag. The other thread is the interrupt handler, which is single |
| 167 | threaded by the hardware and other software. |
| 168 | |
| 169 | The send packet thread has partial control over the Tx ring and 'dev->tbusy' |
| 170 | flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next |
| 171 | queue slot is empty, it clears the tbusy flag when finished otherwise it sets |
| 172 | the 'lp->tx_full' flag. |
| 173 | |
| 174 | The interrupt handler has exclusive control over the Rx ring and records stats |
| 175 | from the Tx ring. (The Tx-done interrupt can't be selectively turned off, so |
| 176 | we can't avoid the interrupt overhead by having the Tx routine reap the Tx |
| 177 | stats.) After reaping the stats, it marks the queue entry as empty by setting |
| 178 | the 'base' to zero. Iff the 'lp->tx_full' flag is set, it clears both the |
| 179 | tx_full and tbusy flags. |
| 180 | |
| 181 | */ |
| 182 | |
| 183 | /* Set the number of Tx and Rx buffers, using Log_2(# buffers). |
| 184 | Reasonable default values are 16 Tx buffers, and 16 Rx buffers. |
| 185 | That translates to 4 and 4 (16 == 2^^4). |
| 186 | This is a compile-time option for efficiency. |
| 187 | */ |
| 188 | #ifndef LANCE_LOG_TX_BUFFERS |
| 189 | #define LANCE_LOG_TX_BUFFERS 4 |
| 190 | #define LANCE_LOG_RX_BUFFERS 4 |
| 191 | #endif |
| 192 | |
| 193 | #define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS)) |
| 194 | #define TX_RING_MOD_MASK (TX_RING_SIZE - 1) |
| 195 | #define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29) |
| 196 | |
| 197 | #define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS)) |
| 198 | #define RX_RING_MOD_MASK (RX_RING_SIZE - 1) |
| 199 | #define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29) |
| 200 | |
| 201 | #define PKT_BUF_SZ 1544 |
| 202 | |
| 203 | /* Offsets from base I/O address. */ |
| 204 | #define LANCE_DATA 0x10 |
| 205 | #define LANCE_ADDR 0x12 |
| 206 | #define LANCE_RESET 0x14 |
| 207 | #define LANCE_BUS_IF 0x16 |
| 208 | #define LANCE_TOTAL_SIZE 0x18 |
| 209 | |
Eric Dumazet | c63fdf4 | 2010-11-03 22:49:35 +0000 | [diff] [blame^] | 210 | #define TX_TIMEOUT (HZ/5) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
| 212 | /* The LANCE Rx and Tx ring descriptors. */ |
| 213 | struct lance_rx_head { |
| 214 | s32 base; |
| 215 | s16 buf_length; /* This length is 2s complement (negative)! */ |
| 216 | s16 msg_length; /* This length is "normal". */ |
| 217 | }; |
| 218 | |
| 219 | struct lance_tx_head { |
| 220 | s32 base; |
| 221 | s16 length; /* Length is 2s complement (negative)! */ |
| 222 | s16 misc; |
| 223 | }; |
| 224 | |
| 225 | /* The LANCE initialization block, described in databook. */ |
| 226 | struct lance_init_block { |
| 227 | u16 mode; /* Pre-set mode (reg. 15) */ |
| 228 | u8 phys_addr[6]; /* Physical ethernet address */ |
| 229 | u32 filter[2]; /* Multicast filter (unused). */ |
| 230 | /* Receive and transmit ring base, along with extra bits. */ |
| 231 | u32 rx_ring; /* Tx and Rx ring base pointers */ |
| 232 | u32 tx_ring; |
| 233 | }; |
| 234 | |
| 235 | struct lance_private { |
| 236 | /* The Tx and Rx ring entries must be aligned on 8-byte boundaries. */ |
| 237 | struct lance_rx_head rx_ring[RX_RING_SIZE]; |
| 238 | struct lance_tx_head tx_ring[TX_RING_SIZE]; |
| 239 | struct lance_init_block init_block; |
| 240 | const char *name; |
| 241 | /* The saved address of a sent-in-place packet/buffer, for skfree(). */ |
| 242 | struct sk_buff* tx_skbuff[TX_RING_SIZE]; |
| 243 | /* The addresses of receive-in-place skbuffs. */ |
| 244 | struct sk_buff* rx_skbuff[RX_RING_SIZE]; |
| 245 | unsigned long rx_buffs; /* Address of Rx and Tx buffers. */ |
| 246 | /* Tx low-memory "bounce buffer" address. */ |
| 247 | char (*tx_bounce_buffs)[PKT_BUF_SZ]; |
| 248 | int cur_rx, cur_tx; /* The next free ring entry */ |
| 249 | int dirty_rx, dirty_tx; /* The ring entries to be free()ed. */ |
| 250 | int dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | unsigned char chip_version; /* See lance_chip_type. */ |
| 252 | spinlock_t devlock; |
| 253 | }; |
| 254 | |
| 255 | #define LANCE_MUST_PAD 0x00000001 |
| 256 | #define LANCE_ENABLE_AUTOSELECT 0x00000002 |
| 257 | #define LANCE_MUST_REINIT_RING 0x00000004 |
| 258 | #define LANCE_MUST_UNRESET 0x00000008 |
| 259 | #define LANCE_HAS_MISSED_FRAME 0x00000010 |
| 260 | |
| 261 | /* A mapping from the chip ID number to the part number and features. |
| 262 | These are from the datasheets -- in real life the '970 version |
| 263 | reportedly has the same ID as the '965. */ |
| 264 | static struct lance_chip_type { |
| 265 | int id_number; |
| 266 | const char *name; |
| 267 | int flags; |
| 268 | } chip_table[] = { |
| 269 | {0x0000, "LANCE 7990", /* Ancient lance chip. */ |
| 270 | LANCE_MUST_PAD + LANCE_MUST_UNRESET}, |
| 271 | {0x0003, "PCnet/ISA 79C960", /* 79C960 PCnet/ISA. */ |
| 272 | LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING + |
| 273 | LANCE_HAS_MISSED_FRAME}, |
| 274 | {0x2260, "PCnet/ISA+ 79C961", /* 79C961 PCnet/ISA+, Plug-n-Play. */ |
| 275 | LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING + |
| 276 | LANCE_HAS_MISSED_FRAME}, |
| 277 | {0x2420, "PCnet/PCI 79C970", /* 79C970 or 79C974 PCnet-SCSI, PCI. */ |
| 278 | LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING + |
| 279 | LANCE_HAS_MISSED_FRAME}, |
| 280 | /* Bug: the PCnet/PCI actually uses the PCnet/VLB ID number, so just call |
| 281 | it the PCnet32. */ |
| 282 | {0x2430, "PCnet32", /* 79C965 PCnet for VL bus. */ |
| 283 | LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING + |
| 284 | LANCE_HAS_MISSED_FRAME}, |
| 285 | {0x2621, "PCnet/PCI-II 79C970A", /* 79C970A PCInetPCI II. */ |
| 286 | LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING + |
| 287 | LANCE_HAS_MISSED_FRAME}, |
| 288 | {0x0, "PCnet (unknown)", |
| 289 | LANCE_ENABLE_AUTOSELECT + LANCE_MUST_REINIT_RING + |
| 290 | LANCE_HAS_MISSED_FRAME}, |
| 291 | }; |
| 292 | |
| 293 | enum {OLD_LANCE = 0, PCNET_ISA=1, PCNET_ISAP=2, PCNET_PCI=3, PCNET_VLB=4, PCNET_PCI_II=5, LANCE_UNKNOWN=6}; |
| 294 | |
| 295 | |
| 296 | /* Non-zero if lance_probe1() needs to allocate low-memory bounce buffers. |
| 297 | Assume yes until we know the memory size. */ |
| 298 | static unsigned char lance_need_isa_bounce_buffers = 1; |
| 299 | |
| 300 | static int lance_open(struct net_device *dev); |
Al Viro | 9e24974 | 2005-10-21 03:22:29 -0400 | [diff] [blame] | 301 | static void lance_init_ring(struct net_device *dev, gfp_t mode); |
Stephen Hemminger | 61357325 | 2009-08-31 19:50:58 +0000 | [diff] [blame] | 302 | static netdev_tx_t lance_start_xmit(struct sk_buff *skb, |
| 303 | struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | static int lance_rx(struct net_device *dev); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 305 | static irqreturn_t lance_interrupt(int irq, void *dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | static int lance_close(struct net_device *dev); |
| 307 | static struct net_device_stats *lance_get_stats(struct net_device *dev); |
| 308 | static void set_multicast_list(struct net_device *dev); |
| 309 | static void lance_tx_timeout (struct net_device *dev); |
| 310 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | #ifdef MODULE |
| 314 | #define MAX_CARDS 8 /* Max number of interfaces (cards) per module */ |
| 315 | |
| 316 | static struct net_device *dev_lance[MAX_CARDS]; |
| 317 | static int io[MAX_CARDS]; |
| 318 | static int dma[MAX_CARDS]; |
| 319 | static int irq[MAX_CARDS]; |
| 320 | |
| 321 | module_param_array(io, int, NULL, 0); |
| 322 | module_param_array(dma, int, NULL, 0); |
| 323 | module_param_array(irq, int, NULL, 0); |
| 324 | module_param(lance_debug, int, 0); |
| 325 | MODULE_PARM_DESC(io, "LANCE/PCnet I/O base address(es),required"); |
| 326 | MODULE_PARM_DESC(dma, "LANCE/PCnet ISA DMA channel (ignored for some devices)"); |
| 327 | MODULE_PARM_DESC(irq, "LANCE/PCnet IRQ number (ignored for some devices)"); |
| 328 | MODULE_PARM_DESC(lance_debug, "LANCE/PCnet debug level (0-7)"); |
| 329 | |
Andrew Morton | 3805f0e | 2006-08-14 23:00:03 -0700 | [diff] [blame] | 330 | int __init init_module(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | { |
| 332 | struct net_device *dev; |
| 333 | int this_dev, found = 0; |
| 334 | |
| 335 | for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) { |
| 336 | if (io[this_dev] == 0) { |
| 337 | if (this_dev != 0) /* only complain once */ |
| 338 | break; |
| 339 | printk(KERN_NOTICE "lance.c: Module autoprobing not allowed. Append \"io=0xNNN\" value(s).\n"); |
| 340 | return -EPERM; |
| 341 | } |
| 342 | dev = alloc_etherdev(0); |
| 343 | if (!dev) |
| 344 | break; |
| 345 | dev->irq = irq[this_dev]; |
| 346 | dev->base_addr = io[this_dev]; |
| 347 | dev->dma = dma[this_dev]; |
| 348 | if (do_lance_probe(dev) == 0) { |
| b1fc550 | 2005-05-12 20:11:55 -0400 | [diff] [blame] | 349 | dev_lance[found++] = dev; |
| 350 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | } |
| 352 | free_netdev(dev); |
| 353 | break; |
| 354 | } |
| 355 | if (found != 0) |
| 356 | return 0; |
| 357 | return -ENXIO; |
| 358 | } |
| 359 | |
Denis Vlasenko | 64916f1 | 2006-01-05 22:45:47 -0800 | [diff] [blame] | 360 | static void cleanup_card(struct net_device *dev) |
| 361 | { |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 362 | struct lance_private *lp = dev->ml_priv; |
Denis Vlasenko | 64916f1 | 2006-01-05 22:45:47 -0800 | [diff] [blame] | 363 | if (dev->dma != 4) |
| 364 | free_dma(dev->dma); |
| 365 | release_region(dev->base_addr, LANCE_TOTAL_SIZE); |
| 366 | kfree(lp->tx_bounce_buffs); |
| 367 | kfree((void*)lp->rx_buffs); |
| 368 | kfree(lp); |
| 369 | } |
| 370 | |
Al Viro | afc8eb4 | 2006-06-14 18:50:53 -0400 | [diff] [blame] | 371 | void __exit cleanup_module(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | { |
| 373 | int this_dev; |
| 374 | |
| 375 | for (this_dev = 0; this_dev < MAX_CARDS; this_dev++) { |
| 376 | struct net_device *dev = dev_lance[this_dev]; |
| 377 | if (dev) { |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 378 | unregister_netdev(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | cleanup_card(dev); |
| 380 | free_netdev(dev); |
| 381 | } |
| 382 | } |
| 383 | } |
| 384 | #endif /* MODULE */ |
| 385 | MODULE_LICENSE("GPL"); |
| 386 | |
| 387 | |
| 388 | /* Starting in v2.1.*, the LANCE/PCnet probe is now similar to the other |
| 389 | board probes now that kmalloc() can allocate ISA DMA-able regions. |
| 390 | This also allows the LANCE driver to be used as a module. |
| 391 | */ |
| 392 | static int __init do_lance_probe(struct net_device *dev) |
| 393 | { |
Hannes Eder | 00137da | 2009-02-14 11:13:24 +0000 | [diff] [blame] | 394 | unsigned int *port; |
| 395 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | |
| 397 | if (high_memory <= phys_to_virt(16*1024*1024)) |
| 398 | lance_need_isa_bounce_buffers = 0; |
| 399 | |
| 400 | for (port = lance_portlist; *port; port++) { |
| 401 | int ioaddr = *port; |
| 402 | struct resource *r = request_region(ioaddr, LANCE_TOTAL_SIZE, |
| 403 | "lance-probe"); |
| 404 | |
| 405 | if (r) { |
| 406 | /* Detect the card with minimal I/O reads */ |
| 407 | char offset14 = inb(ioaddr + 14); |
| 408 | int card; |
| 409 | for (card = 0; card < NUM_CARDS; ++card) |
| 410 | if (cards[card].id_offset14 == offset14) |
| 411 | break; |
| 412 | if (card < NUM_CARDS) {/*yes, the first byte matches*/ |
| 413 | char offset15 = inb(ioaddr + 15); |
| 414 | for (card = 0; card < NUM_CARDS; ++card) |
| 415 | if ((cards[card].id_offset14 == offset14) && |
| 416 | (cards[card].id_offset15 == offset15)) |
| 417 | break; |
| 418 | } |
| 419 | if (card < NUM_CARDS) { /*Signature OK*/ |
| 420 | result = lance_probe1(dev, ioaddr, 0, 0); |
| 421 | if (!result) { |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 422 | struct lance_private *lp = dev->ml_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | int ver = lp->chip_version; |
| 424 | |
| 425 | r->name = chip_table[ver].name; |
| 426 | return 0; |
| 427 | } |
| 428 | } |
| 429 | release_region(ioaddr, LANCE_TOTAL_SIZE); |
| 430 | } |
| 431 | } |
| 432 | return -ENODEV; |
| 433 | } |
| 434 | |
| 435 | #ifndef MODULE |
| 436 | struct net_device * __init lance_probe(int unit) |
| 437 | { |
| 438 | struct net_device *dev = alloc_etherdev(0); |
| 439 | int err; |
| 440 | |
| 441 | if (!dev) |
| 442 | return ERR_PTR(-ENODEV); |
| 443 | |
| 444 | sprintf(dev->name, "eth%d", unit); |
| 445 | netdev_boot_setup_check(dev); |
| 446 | |
| 447 | err = do_lance_probe(dev); |
| 448 | if (err) |
| 449 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | return dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | out: |
| 452 | free_netdev(dev); |
| 453 | return ERR_PTR(err); |
| 454 | } |
| 455 | #endif |
| 456 | |
Stephen Hemminger | 462540b | 2009-03-26 15:11:32 +0000 | [diff] [blame] | 457 | static const struct net_device_ops lance_netdev_ops = { |
| 458 | .ndo_open = lance_open, |
| 459 | .ndo_start_xmit = lance_start_xmit, |
| 460 | .ndo_stop = lance_close, |
| 461 | .ndo_get_stats = lance_get_stats, |
| 462 | .ndo_set_multicast_list = set_multicast_list, |
| 463 | .ndo_tx_timeout = lance_tx_timeout, |
| 464 | .ndo_change_mtu = eth_change_mtu, |
| 465 | .ndo_set_mac_address = eth_mac_addr, |
| 466 | .ndo_validate_addr = eth_validate_addr, |
| 467 | }; |
| 468 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | static int __init lance_probe1(struct net_device *dev, int ioaddr, int irq, int options) |
| 470 | { |
| 471 | struct lance_private *lp; |
Hannes Eder | 00137da | 2009-02-14 11:13:24 +0000 | [diff] [blame] | 472 | unsigned long dma_channels; /* Mark spuriously-busy DMA channels */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | int i, reset_val, lance_version; |
| 474 | const char *chipname; |
| 475 | /* Flags for specific chips or boards. */ |
Hannes Eder | 00137da | 2009-02-14 11:13:24 +0000 | [diff] [blame] | 476 | unsigned char hpJ2405A = 0; /* HP ISA adaptor */ |
| 477 | int hp_builtin = 0; /* HP on-board ethernet. */ |
| 478 | static int did_version; /* Already printed version info. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | unsigned long flags; |
| 480 | int err = -ENOMEM; |
Al Viro | c44fec1 | 2006-03-24 03:15:41 -0800 | [diff] [blame] | 481 | void __iomem *bios; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
| 483 | /* First we look for special cases. |
| 484 | Check for HP's on-board ethernet by looking for 'HP' in the BIOS. |
| 485 | There are two HP versions, check the BIOS for the configuration port. |
| 486 | This method provided by L. Julliard, Laurent_Julliard@grenoble.hp.com. |
| 487 | */ |
Al Viro | c44fec1 | 2006-03-24 03:15:41 -0800 | [diff] [blame] | 488 | bios = ioremap(0xf00f0, 0x14); |
| 489 | if (!bios) |
| 490 | return -ENOMEM; |
| 491 | if (readw(bios + 0x12) == 0x5048) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | static const short ioaddr_table[] = { 0x300, 0x320, 0x340, 0x360}; |
Al Viro | c44fec1 | 2006-03-24 03:15:41 -0800 | [diff] [blame] | 493 | int hp_port = (readl(bios + 1) & 1) ? 0x499 : 0x99; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | /* We can have boards other than the built-in! Verify this is on-board. */ |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 495 | if ((inb(hp_port) & 0xc0) == 0x80 && |
| 496 | ioaddr_table[inb(hp_port) & 3] == ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | hp_builtin = hp_port; |
| 498 | } |
Al Viro | c44fec1 | 2006-03-24 03:15:41 -0800 | [diff] [blame] | 499 | iounmap(bios); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | /* We also recognize the HP Vectra on-board here, but check below. */ |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 501 | hpJ2405A = (inb(ioaddr) == 0x08 && inb(ioaddr+1) == 0x00 && |
| 502 | inb(ioaddr+2) == 0x09); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
| 504 | /* Reset the LANCE. */ |
| 505 | reset_val = inw(ioaddr+LANCE_RESET); /* Reset the LANCE */ |
| 506 | |
| 507 | /* The Un-Reset needed is only needed for the real NE2100, and will |
| 508 | confuse the HP board. */ |
| 509 | if (!hpJ2405A) |
| 510 | outw(reset_val, ioaddr+LANCE_RESET); |
| 511 | |
| 512 | outw(0x0000, ioaddr+LANCE_ADDR); /* Switch to window 0 */ |
| 513 | if (inw(ioaddr+LANCE_DATA) != 0x0004) |
| 514 | return -ENODEV; |
| 515 | |
| 516 | /* Get the version of the chip. */ |
| 517 | outw(88, ioaddr+LANCE_ADDR); |
| 518 | if (inw(ioaddr+LANCE_ADDR) != 88) { |
| 519 | lance_version = 0; |
| 520 | } else { /* Good, it's a newer chip. */ |
| 521 | int chip_version = inw(ioaddr+LANCE_DATA); |
| 522 | outw(89, ioaddr+LANCE_ADDR); |
| 523 | chip_version |= inw(ioaddr+LANCE_DATA) << 16; |
| 524 | if (lance_debug > 2) |
| 525 | printk(" LANCE chip version is %#x.\n", chip_version); |
| 526 | if ((chip_version & 0xfff) != 0x003) |
| 527 | return -ENODEV; |
| 528 | chip_version = (chip_version >> 12) & 0xffff; |
| 529 | for (lance_version = 1; chip_table[lance_version].id_number; lance_version++) { |
| 530 | if (chip_table[lance_version].id_number == chip_version) |
| 531 | break; |
| 532 | } |
| 533 | } |
| 534 | |
Wang Chen | b74ca3a | 2008-12-08 01:14:16 -0800 | [diff] [blame] | 535 | /* We can't allocate private data from alloc_etherdev() because it must |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | a ISA DMA-able region. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | chipname = chip_table[lance_version].name; |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 538 | printk("%s: %s at %#3x, ", dev->name, chipname, ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
| 540 | /* There is a 16 byte station address PROM at the base address. |
| 541 | The first six bytes are the station address. */ |
| 542 | for (i = 0; i < 6; i++) |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 543 | dev->dev_addr[i] = inb(ioaddr + i); |
Johannes Berg | e174961 | 2008-10-27 15:59:26 -0700 | [diff] [blame] | 544 | printk("%pM", dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | |
| 546 | dev->base_addr = ioaddr; |
| 547 | /* Make certain the data structures used by the LANCE are aligned and DMAble. */ |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 548 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 549 | lp = kzalloc(sizeof(*lp), GFP_DMA | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | if(lp==NULL) |
| 551 | return -ENODEV; |
| 552 | if (lance_debug > 6) printk(" (#0x%05lx)", (unsigned long)lp); |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 553 | dev->ml_priv = lp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | lp->name = chipname; |
| 555 | lp->rx_buffs = (unsigned long)kmalloc(PKT_BUF_SZ*RX_RING_SIZE, |
| 556 | GFP_DMA | GFP_KERNEL); |
| 557 | if (!lp->rx_buffs) |
| 558 | goto out_lp; |
| 559 | if (lance_need_isa_bounce_buffers) { |
| 560 | lp->tx_bounce_buffs = kmalloc(PKT_BUF_SZ*TX_RING_SIZE, |
| 561 | GFP_DMA | GFP_KERNEL); |
| 562 | if (!lp->tx_bounce_buffs) |
| 563 | goto out_rx; |
| 564 | } else |
| 565 | lp->tx_bounce_buffs = NULL; |
| 566 | |
| 567 | lp->chip_version = lance_version; |
| 568 | spin_lock_init(&lp->devlock); |
| 569 | |
| 570 | lp->init_block.mode = 0x0003; /* Disable Rx and Tx. */ |
| 571 | for (i = 0; i < 6; i++) |
| 572 | lp->init_block.phys_addr[i] = dev->dev_addr[i]; |
| 573 | lp->init_block.filter[0] = 0x00000000; |
| 574 | lp->init_block.filter[1] = 0x00000000; |
| 575 | lp->init_block.rx_ring = ((u32)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS; |
| 576 | lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS; |
| 577 | |
| 578 | outw(0x0001, ioaddr+LANCE_ADDR); |
| 579 | inw(ioaddr+LANCE_ADDR); |
| 580 | outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA); |
| 581 | outw(0x0002, ioaddr+LANCE_ADDR); |
| 582 | inw(ioaddr+LANCE_ADDR); |
| 583 | outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA); |
| 584 | outw(0x0000, ioaddr+LANCE_ADDR); |
| 585 | inw(ioaddr+LANCE_ADDR); |
| 586 | |
| 587 | if (irq) { /* Set iff PCI card. */ |
| 588 | dev->dma = 4; /* Native bus-master, no DMA channel needed. */ |
| 589 | dev->irq = irq; |
| 590 | } else if (hp_builtin) { |
| 591 | static const char dma_tbl[4] = {3, 5, 6, 0}; |
| 592 | static const char irq_tbl[4] = {3, 4, 5, 9}; |
| 593 | unsigned char port_val = inb(hp_builtin); |
| 594 | dev->dma = dma_tbl[(port_val >> 4) & 3]; |
| 595 | dev->irq = irq_tbl[(port_val >> 2) & 3]; |
| 596 | printk(" HP Vectra IRQ %d DMA %d.\n", dev->irq, dev->dma); |
| 597 | } else if (hpJ2405A) { |
| 598 | static const char dma_tbl[4] = {3, 5, 6, 7}; |
| 599 | static const char irq_tbl[8] = {3, 4, 5, 9, 10, 11, 12, 15}; |
| 600 | short reset_val = inw(ioaddr+LANCE_RESET); |
| 601 | dev->dma = dma_tbl[(reset_val >> 2) & 3]; |
| 602 | dev->irq = irq_tbl[(reset_val >> 4) & 7]; |
| 603 | printk(" HP J2405A IRQ %d DMA %d.\n", dev->irq, dev->dma); |
| 604 | } else if (lance_version == PCNET_ISAP) { /* The plug-n-play version. */ |
| 605 | short bus_info; |
| 606 | outw(8, ioaddr+LANCE_ADDR); |
| 607 | bus_info = inw(ioaddr+LANCE_BUS_IF); |
| 608 | dev->dma = bus_info & 0x07; |
| 609 | dev->irq = (bus_info >> 4) & 0x0F; |
| 610 | } else { |
| 611 | /* The DMA channel may be passed in PARAM1. */ |
| 612 | if (dev->mem_start & 0x07) |
| 613 | dev->dma = dev->mem_start & 0x07; |
| 614 | } |
| 615 | |
| 616 | if (dev->dma == 0) { |
| 617 | /* Read the DMA channel status register, so that we can avoid |
| 618 | stuck DMA channels in the DMA detection below. */ |
| 619 | dma_channels = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) | |
| 620 | (inb(DMA2_STAT_REG) & 0xf0); |
| 621 | } |
| 622 | err = -ENODEV; |
| 623 | if (dev->irq >= 2) |
| 624 | printk(" assigned IRQ %d", dev->irq); |
| 625 | else if (lance_version != 0) { /* 7990 boards need DMA detection first. */ |
| 626 | unsigned long irq_mask; |
| 627 | |
| 628 | /* To auto-IRQ we enable the initialization-done and DMA error |
| 629 | interrupts. For ISA boards we get a DMA error, but VLB and PCI |
| 630 | boards will work. */ |
| 631 | irq_mask = probe_irq_on(); |
| 632 | |
| 633 | /* Trigger an initialization just for the interrupt. */ |
| 634 | outw(0x0041, ioaddr+LANCE_DATA); |
| 635 | |
| 636 | mdelay(20); |
| 637 | dev->irq = probe_irq_off(irq_mask); |
| 638 | if (dev->irq) |
| 639 | printk(", probed IRQ %d", dev->irq); |
| 640 | else { |
| 641 | printk(", failed to detect IRQ line.\n"); |
| 642 | goto out_tx; |
| 643 | } |
| 644 | |
| 645 | /* Check for the initialization done bit, 0x0100, which means |
| 646 | that we don't need a DMA channel. */ |
| 647 | if (inw(ioaddr+LANCE_DATA) & 0x0100) |
| 648 | dev->dma = 4; |
| 649 | } |
| 650 | |
| 651 | if (dev->dma == 4) { |
| 652 | printk(", no DMA needed.\n"); |
| 653 | } else if (dev->dma) { |
| 654 | if (request_dma(dev->dma, chipname)) { |
| 655 | printk("DMA %d allocation failed.\n", dev->dma); |
| 656 | goto out_tx; |
| 657 | } else |
| 658 | printk(", assigned DMA %d.\n", dev->dma); |
| 659 | } else { /* OK, we have to auto-DMA. */ |
| 660 | for (i = 0; i < 4; i++) { |
| 661 | static const char dmas[] = { 5, 6, 7, 3 }; |
| 662 | int dma = dmas[i]; |
| 663 | int boguscnt; |
| 664 | |
| 665 | /* Don't enable a permanently busy DMA channel, or the machine |
| 666 | will hang. */ |
| 667 | if (test_bit(dma, &dma_channels)) |
| 668 | continue; |
| 669 | outw(0x7f04, ioaddr+LANCE_DATA); /* Clear the memory error bits. */ |
| 670 | if (request_dma(dma, chipname)) |
| 671 | continue; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 672 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | flags=claim_dma_lock(); |
| 674 | set_dma_mode(dma, DMA_MODE_CASCADE); |
| 675 | enable_dma(dma); |
| 676 | release_dma_lock(flags); |
| 677 | |
| 678 | /* Trigger an initialization. */ |
| 679 | outw(0x0001, ioaddr+LANCE_DATA); |
| 680 | for (boguscnt = 100; boguscnt > 0; --boguscnt) |
| 681 | if (inw(ioaddr+LANCE_DATA) & 0x0900) |
| 682 | break; |
| 683 | if (inw(ioaddr+LANCE_DATA) & 0x0100) { |
| 684 | dev->dma = dma; |
| 685 | printk(", DMA %d.\n", dev->dma); |
| 686 | break; |
| 687 | } else { |
| 688 | flags=claim_dma_lock(); |
| 689 | disable_dma(dma); |
| 690 | release_dma_lock(flags); |
| 691 | free_dma(dma); |
| 692 | } |
| 693 | } |
| 694 | if (i == 4) { /* Failure: bail. */ |
| 695 | printk("DMA detection failed.\n"); |
| 696 | goto out_tx; |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | if (lance_version == 0 && dev->irq == 0) { |
| 701 | /* We may auto-IRQ now that we have a DMA channel. */ |
| 702 | /* Trigger an initialization just for the interrupt. */ |
| 703 | unsigned long irq_mask; |
| 704 | |
| 705 | irq_mask = probe_irq_on(); |
| 706 | outw(0x0041, ioaddr+LANCE_DATA); |
| 707 | |
| 708 | mdelay(40); |
| 709 | dev->irq = probe_irq_off(irq_mask); |
| 710 | if (dev->irq == 0) { |
| 711 | printk(" Failed to detect the 7990 IRQ line.\n"); |
| 712 | goto out_dma; |
| 713 | } |
| 714 | printk(" Auto-IRQ detected IRQ%d.\n", dev->irq); |
| 715 | } |
| 716 | |
| 717 | if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) { |
| 718 | /* Turn on auto-select of media (10baseT or BNC) so that the user |
| 719 | can watch the LEDs even if the board isn't opened. */ |
| 720 | outw(0x0002, ioaddr+LANCE_ADDR); |
| 721 | /* Don't touch 10base2 power bit. */ |
| 722 | outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF); |
| 723 | } |
| 724 | |
| 725 | if (lance_debug > 0 && did_version++ == 0) |
| 726 | printk(version); |
| 727 | |
| 728 | /* The LANCE-specific entries in the device structure. */ |
Stephen Hemminger | 462540b | 2009-03-26 15:11:32 +0000 | [diff] [blame] | 729 | dev->netdev_ops = &lance_netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | dev->watchdog_timeo = TX_TIMEOUT; |
| 731 | |
| b1fc550 | 2005-05-12 20:11:55 -0400 | [diff] [blame] | 732 | err = register_netdev(dev); |
| 733 | if (err) |
| 734 | goto out_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | return 0; |
| 736 | out_dma: |
| 737 | if (dev->dma != 4) |
| 738 | free_dma(dev->dma); |
| 739 | out_tx: |
| 740 | kfree(lp->tx_bounce_buffs); |
| 741 | out_rx: |
| 742 | kfree((void*)lp->rx_buffs); |
| 743 | out_lp: |
| 744 | kfree(lp); |
| 745 | return err; |
| 746 | } |
| 747 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 748 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | static int |
| 750 | lance_open(struct net_device *dev) |
| 751 | { |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 752 | struct lance_private *lp = dev->ml_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | int ioaddr = dev->base_addr; |
| 754 | int i; |
| 755 | |
| 756 | if (dev->irq == 0 || |
Joe Perches | a0607fd | 2009-11-18 23:29:17 -0800 | [diff] [blame] | 757 | request_irq(dev->irq, lance_interrupt, 0, lp->name, dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | return -EAGAIN; |
| 759 | } |
| 760 | |
| 761 | /* We used to allocate DMA here, but that was silly. |
| 762 | DMA lines can't be shared! We now permanently allocate them. */ |
| 763 | |
| 764 | /* Reset the LANCE */ |
| 765 | inw(ioaddr+LANCE_RESET); |
| 766 | |
| 767 | /* The DMA controller is used as a no-operation slave, "cascade mode". */ |
| 768 | if (dev->dma != 4) { |
| 769 | unsigned long flags=claim_dma_lock(); |
| 770 | enable_dma(dev->dma); |
| 771 | set_dma_mode(dev->dma, DMA_MODE_CASCADE); |
| 772 | release_dma_lock(flags); |
| 773 | } |
| 774 | |
| 775 | /* Un-Reset the LANCE, needed only for the NE2100. */ |
| 776 | if (chip_table[lp->chip_version].flags & LANCE_MUST_UNRESET) |
| 777 | outw(0, ioaddr+LANCE_RESET); |
| 778 | |
| 779 | if (chip_table[lp->chip_version].flags & LANCE_ENABLE_AUTOSELECT) { |
| 780 | /* This is 79C960-specific: Turn on auto-select of media (AUI, BNC). */ |
| 781 | outw(0x0002, ioaddr+LANCE_ADDR); |
| 782 | /* Only touch autoselect bit. */ |
| 783 | outw(inw(ioaddr+LANCE_BUS_IF) | 0x0002, ioaddr+LANCE_BUS_IF); |
| 784 | } |
| 785 | |
| 786 | if (lance_debug > 1) |
| 787 | printk("%s: lance_open() irq %d dma %d tx/rx rings %#x/%#x init %#x.\n", |
| 788 | dev->name, dev->irq, dev->dma, |
| 789 | (u32) isa_virt_to_bus(lp->tx_ring), |
| 790 | (u32) isa_virt_to_bus(lp->rx_ring), |
| 791 | (u32) isa_virt_to_bus(&lp->init_block)); |
| 792 | |
| 793 | lance_init_ring(dev, GFP_KERNEL); |
| 794 | /* Re-initialize the LANCE, and start it when done. */ |
| 795 | outw(0x0001, ioaddr+LANCE_ADDR); |
| 796 | outw((short) (u32) isa_virt_to_bus(&lp->init_block), ioaddr+LANCE_DATA); |
| 797 | outw(0x0002, ioaddr+LANCE_ADDR); |
| 798 | outw(((u32)isa_virt_to_bus(&lp->init_block)) >> 16, ioaddr+LANCE_DATA); |
| 799 | |
| 800 | outw(0x0004, ioaddr+LANCE_ADDR); |
| 801 | outw(0x0915, ioaddr+LANCE_DATA); |
| 802 | |
| 803 | outw(0x0000, ioaddr+LANCE_ADDR); |
| 804 | outw(0x0001, ioaddr+LANCE_DATA); |
| 805 | |
| 806 | netif_start_queue (dev); |
| 807 | |
| 808 | i = 0; |
| 809 | while (i++ < 100) |
| 810 | if (inw(ioaddr+LANCE_DATA) & 0x0100) |
| 811 | break; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 812 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | * We used to clear the InitDone bit, 0x0100, here but Mark Stockton |
| 814 | * reports that doing so triggers a bug in the '974. |
| 815 | */ |
| 816 | outw(0x0042, ioaddr+LANCE_DATA); |
| 817 | |
| 818 | if (lance_debug > 2) |
| 819 | printk("%s: LANCE open after %d ticks, init block %#x csr0 %4.4x.\n", |
| 820 | dev->name, i, (u32) isa_virt_to_bus(&lp->init_block), inw(ioaddr+LANCE_DATA)); |
| 821 | |
| 822 | return 0; /* Always succeed */ |
| 823 | } |
| 824 | |
| 825 | /* The LANCE has been halted for one reason or another (busmaster memory |
| 826 | arbitration error, Tx FIFO underflow, driver stopped it to reconfigure, |
| 827 | etc.). Modern LANCE variants always reload their ring-buffer |
| 828 | configuration when restarted, so we must reinitialize our ring |
| 829 | context before restarting. As part of this reinitialization, |
| 830 | find all packets still on the Tx ring and pretend that they had been |
| 831 | sent (in effect, drop the packets on the floor) - the higher-level |
| 832 | protocols will time out and retransmit. It'd be better to shuffle |
| 833 | these skbs to a temp list and then actually re-Tx them after |
| 834 | restarting the chip, but I'm too lazy to do so right now. dplatt@3do.com |
| 835 | */ |
| 836 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 837 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | lance_purge_ring(struct net_device *dev) |
| 839 | { |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 840 | struct lance_private *lp = dev->ml_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | int i; |
| 842 | |
| 843 | /* Free all the skbuffs in the Rx and Tx queues. */ |
| 844 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 845 | struct sk_buff *skb = lp->rx_skbuff[i]; |
| 846 | lp->rx_skbuff[i] = NULL; |
| 847 | lp->rx_ring[i].base = 0; /* Not owned by LANCE chip. */ |
| 848 | if (skb) |
| 849 | dev_kfree_skb_any(skb); |
| 850 | } |
| 851 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 852 | if (lp->tx_skbuff[i]) { |
| 853 | dev_kfree_skb_any(lp->tx_skbuff[i]); |
| 854 | lp->tx_skbuff[i] = NULL; |
| 855 | } |
| 856 | } |
| 857 | } |
| 858 | |
| 859 | |
| 860 | /* Initialize the LANCE Rx and Tx rings. */ |
| 861 | static void |
Al Viro | 9e24974 | 2005-10-21 03:22:29 -0400 | [diff] [blame] | 862 | lance_init_ring(struct net_device *dev, gfp_t gfp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | { |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 864 | struct lance_private *lp = dev->ml_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | int i; |
| 866 | |
| 867 | lp->cur_rx = lp->cur_tx = 0; |
| 868 | lp->dirty_rx = lp->dirty_tx = 0; |
| 869 | |
| 870 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 871 | struct sk_buff *skb; |
| 872 | void *rx_buff; |
| 873 | |
| 874 | skb = alloc_skb(PKT_BUF_SZ, GFP_DMA | gfp); |
| 875 | lp->rx_skbuff[i] = skb; |
| 876 | if (skb) { |
| 877 | skb->dev = dev; |
David S. Miller | 689be43 | 2005-06-28 15:25:31 -0700 | [diff] [blame] | 878 | rx_buff = skb->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | } else |
| 880 | rx_buff = kmalloc(PKT_BUF_SZ, GFP_DMA | gfp); |
| 881 | if (rx_buff == NULL) |
| 882 | lp->rx_ring[i].base = 0; |
| 883 | else |
| 884 | lp->rx_ring[i].base = (u32)isa_virt_to_bus(rx_buff) | 0x80000000; |
| 885 | lp->rx_ring[i].buf_length = -PKT_BUF_SZ; |
| 886 | } |
| 887 | /* The Tx buffer address is filled in as needed, but we do need to clear |
| 888 | the upper ownership bit. */ |
| 889 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 890 | lp->tx_skbuff[i] = NULL; |
| 891 | lp->tx_ring[i].base = 0; |
| 892 | } |
| 893 | |
| 894 | lp->init_block.mode = 0x0000; |
| 895 | for (i = 0; i < 6; i++) |
| 896 | lp->init_block.phys_addr[i] = dev->dev_addr[i]; |
| 897 | lp->init_block.filter[0] = 0x00000000; |
| 898 | lp->init_block.filter[1] = 0x00000000; |
| 899 | lp->init_block.rx_ring = ((u32)isa_virt_to_bus(lp->rx_ring) & 0xffffff) | RX_RING_LEN_BITS; |
| 900 | lp->init_block.tx_ring = ((u32)isa_virt_to_bus(lp->tx_ring) & 0xffffff) | TX_RING_LEN_BITS; |
| 901 | } |
| 902 | |
| 903 | static void |
| 904 | lance_restart(struct net_device *dev, unsigned int csr0_bits, int must_reinit) |
| 905 | { |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 906 | struct lance_private *lp = dev->ml_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | |
| 908 | if (must_reinit || |
| 909 | (chip_table[lp->chip_version].flags & LANCE_MUST_REINIT_RING)) { |
| 910 | lance_purge_ring(dev); |
| 911 | lance_init_ring(dev, GFP_ATOMIC); |
| 912 | } |
| 913 | outw(0x0000, dev->base_addr + LANCE_ADDR); |
| 914 | outw(csr0_bits, dev->base_addr + LANCE_DATA); |
| 915 | } |
| 916 | |
| 917 | |
| 918 | static void lance_tx_timeout (struct net_device *dev) |
| 919 | { |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 920 | struct lance_private *lp = (struct lance_private *) dev->ml_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | int ioaddr = dev->base_addr; |
| 922 | |
| 923 | outw (0, ioaddr + LANCE_ADDR); |
| 924 | printk ("%s: transmit timed out, status %4.4x, resetting.\n", |
| 925 | dev->name, inw (ioaddr + LANCE_DATA)); |
| 926 | outw (0x0004, ioaddr + LANCE_DATA); |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 927 | dev->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | #ifndef final_version |
| 929 | if (lance_debug > 3) { |
| 930 | int i; |
| 931 | printk (" Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.", |
| 932 | lp->dirty_tx, lp->cur_tx, netif_queue_stopped(dev) ? " (full)" : "", |
| 933 | lp->cur_rx); |
| 934 | for (i = 0; i < RX_RING_SIZE; i++) |
| 935 | printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ", |
| 936 | lp->rx_ring[i].base, -lp->rx_ring[i].buf_length, |
| 937 | lp->rx_ring[i].msg_length); |
| 938 | for (i = 0; i < TX_RING_SIZE; i++) |
| 939 | printk ("%s %08x %04x %04x", i & 0x3 ? "" : "\n ", |
| 940 | lp->tx_ring[i].base, -lp->tx_ring[i].length, |
| 941 | lp->tx_ring[i].misc); |
| 942 | printk ("\n"); |
| 943 | } |
| 944 | #endif |
| 945 | lance_restart (dev, 0x0043, 1); |
| 946 | |
Eric Dumazet | 1ae5dc3 | 2010-05-10 05:01:31 -0700 | [diff] [blame] | 947 | dev->trans_start = jiffies; /* prevent tx timeout */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | netif_wake_queue (dev); |
| 949 | } |
| 950 | |
| 951 | |
Stephen Hemminger | 61357325 | 2009-08-31 19:50:58 +0000 | [diff] [blame] | 952 | static netdev_tx_t lance_start_xmit(struct sk_buff *skb, |
| 953 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | { |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 955 | struct lance_private *lp = dev->ml_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | int ioaddr = dev->base_addr; |
| 957 | int entry; |
| 958 | unsigned long flags; |
| 959 | |
| 960 | spin_lock_irqsave(&lp->devlock, flags); |
| 961 | |
| 962 | if (lance_debug > 3) { |
| 963 | outw(0x0000, ioaddr+LANCE_ADDR); |
| 964 | printk("%s: lance_start_xmit() called, csr0 %4.4x.\n", dev->name, |
| 965 | inw(ioaddr+LANCE_DATA)); |
| 966 | outw(0x0000, ioaddr+LANCE_DATA); |
| 967 | } |
| 968 | |
| 969 | /* Fill in a Tx ring entry */ |
| 970 | |
| 971 | /* Mask to ring buffer boundary. */ |
| 972 | entry = lp->cur_tx & TX_RING_MOD_MASK; |
| 973 | |
| 974 | /* Caution: the write order is important here, set the base address |
| 975 | with the "ownership" bits last. */ |
| 976 | |
| 977 | /* The old LANCE chips doesn't automatically pad buffers to min. size. */ |
| 978 | if (chip_table[lp->chip_version].flags & LANCE_MUST_PAD) { |
| 979 | if (skb->len < ETH_ZLEN) { |
Herbert Xu | 5b057c6 | 2006-06-23 02:06:41 -0700 | [diff] [blame] | 980 | if (skb_padto(skb, ETH_ZLEN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | goto out; |
| 982 | lp->tx_ring[entry].length = -ETH_ZLEN; |
| 983 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 984 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | lp->tx_ring[entry].length = -skb->len; |
| 986 | } else |
| 987 | lp->tx_ring[entry].length = -skb->len; |
| 988 | |
| 989 | lp->tx_ring[entry].misc = 0x0000; |
| 990 | |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 991 | dev->stats.tx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | |
| 993 | /* If any part of this buffer is >16M we must copy it to a low-memory |
| 994 | buffer. */ |
| 995 | if ((u32)isa_virt_to_bus(skb->data) + skb->len > 0x01000000) { |
| 996 | if (lance_debug > 5) |
| 997 | printk("%s: bouncing a high-memory packet (%#x).\n", |
| 998 | dev->name, (u32)isa_virt_to_bus(skb->data)); |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 999 | skb_copy_from_linear_data(skb, &lp->tx_bounce_buffs[entry], skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | lp->tx_ring[entry].base = |
| 1001 | ((u32)isa_virt_to_bus((lp->tx_bounce_buffs + entry)) & 0xffffff) | 0x83000000; |
| 1002 | dev_kfree_skb(skb); |
| 1003 | } else { |
| 1004 | lp->tx_skbuff[entry] = skb; |
| 1005 | lp->tx_ring[entry].base = ((u32)isa_virt_to_bus(skb->data) & 0xffffff) | 0x83000000; |
| 1006 | } |
| 1007 | lp->cur_tx++; |
| 1008 | |
| 1009 | /* Trigger an immediate send poll. */ |
| 1010 | outw(0x0000, ioaddr+LANCE_ADDR); |
| 1011 | outw(0x0048, ioaddr+LANCE_DATA); |
| 1012 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | if ((lp->cur_tx - lp->dirty_tx) >= TX_RING_SIZE) |
| 1014 | netif_stop_queue(dev); |
| 1015 | |
| 1016 | out: |
| 1017 | spin_unlock_irqrestore(&lp->devlock, flags); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 1018 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | } |
| 1020 | |
| 1021 | /* The LANCE interrupt handler. */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1022 | static irqreturn_t lance_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | { |
| 1024 | struct net_device *dev = dev_id; |
| 1025 | struct lance_private *lp; |
| 1026 | int csr0, ioaddr, boguscnt=10; |
| 1027 | int must_restart; |
| 1028 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | ioaddr = dev->base_addr; |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 1030 | lp = dev->ml_priv; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1031 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | spin_lock (&lp->devlock); |
| 1033 | |
| 1034 | outw(0x00, dev->base_addr + LANCE_ADDR); |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 1035 | while ((csr0 = inw(dev->base_addr + LANCE_DATA)) & 0x8600 && |
| 1036 | --boguscnt >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | /* Acknowledge all of the current interrupt sources ASAP. */ |
| 1038 | outw(csr0 & ~0x004f, dev->base_addr + LANCE_DATA); |
| 1039 | |
| 1040 | must_restart = 0; |
| 1041 | |
| 1042 | if (lance_debug > 5) |
| 1043 | printk("%s: interrupt csr0=%#2.2x new csr=%#2.2x.\n", |
| 1044 | dev->name, csr0, inw(dev->base_addr + LANCE_DATA)); |
| 1045 | |
| 1046 | if (csr0 & 0x0400) /* Rx interrupt */ |
| 1047 | lance_rx(dev); |
| 1048 | |
| 1049 | if (csr0 & 0x0200) { /* Tx-done interrupt */ |
| 1050 | int dirty_tx = lp->dirty_tx; |
| 1051 | |
| 1052 | while (dirty_tx < lp->cur_tx) { |
| 1053 | int entry = dirty_tx & TX_RING_MOD_MASK; |
| 1054 | int status = lp->tx_ring[entry].base; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1055 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | if (status < 0) |
| 1057 | break; /* It still hasn't been Txed */ |
| 1058 | |
| 1059 | lp->tx_ring[entry].base = 0; |
| 1060 | |
| 1061 | if (status & 0x40000000) { |
| 1062 | /* There was an major error, log it. */ |
| 1063 | int err_status = lp->tx_ring[entry].misc; |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 1064 | dev->stats.tx_errors++; |
| 1065 | if (err_status & 0x0400) |
| 1066 | dev->stats.tx_aborted_errors++; |
| 1067 | if (err_status & 0x0800) |
| 1068 | dev->stats.tx_carrier_errors++; |
| 1069 | if (err_status & 0x1000) |
| 1070 | dev->stats.tx_window_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | if (err_status & 0x4000) { |
| 1072 | /* Ackk! On FIFO errors the Tx unit is turned off! */ |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 1073 | dev->stats.tx_fifo_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | /* Remove this verbosity later! */ |
| 1075 | printk("%s: Tx FIFO error! Status %4.4x.\n", |
| 1076 | dev->name, csr0); |
| 1077 | /* Restart the chip. */ |
| 1078 | must_restart = 1; |
| 1079 | } |
| 1080 | } else { |
| 1081 | if (status & 0x18000000) |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 1082 | dev->stats.collisions++; |
| 1083 | dev->stats.tx_packets++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | } |
| 1085 | |
| 1086 | /* We must free the original skb if it's not a data-only copy |
| 1087 | in the bounce buffer. */ |
| 1088 | if (lp->tx_skbuff[entry]) { |
| 1089 | dev_kfree_skb_irq(lp->tx_skbuff[entry]); |
| 1090 | lp->tx_skbuff[entry] = NULL; |
| 1091 | } |
| 1092 | dirty_tx++; |
| 1093 | } |
| 1094 | |
| 1095 | #ifndef final_version |
| 1096 | if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) { |
| 1097 | printk("out-of-sync dirty pointer, %d vs. %d, full=%s.\n", |
| 1098 | dirty_tx, lp->cur_tx, |
| 1099 | netif_queue_stopped(dev) ? "yes" : "no"); |
| 1100 | dirty_tx += TX_RING_SIZE; |
| 1101 | } |
| 1102 | #endif |
| 1103 | |
| 1104 | /* if the ring is no longer full, accept more packets */ |
| 1105 | if (netif_queue_stopped(dev) && |
| 1106 | dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) |
| 1107 | netif_wake_queue (dev); |
| 1108 | |
| 1109 | lp->dirty_tx = dirty_tx; |
| 1110 | } |
| 1111 | |
| 1112 | /* Log misc errors. */ |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 1113 | if (csr0 & 0x4000) |
| 1114 | dev->stats.tx_errors++; /* Tx babble. */ |
| 1115 | if (csr0 & 0x1000) |
| 1116 | dev->stats.rx_errors++; /* Missed a Rx frame. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | if (csr0 & 0x0800) { |
| 1118 | printk("%s: Bus master arbitration failure, status %4.4x.\n", |
| 1119 | dev->name, csr0); |
| 1120 | /* Restart the chip. */ |
| 1121 | must_restart = 1; |
| 1122 | } |
| 1123 | |
| 1124 | if (must_restart) { |
| 1125 | /* stop the chip to clear the error condition, then restart */ |
| 1126 | outw(0x0000, dev->base_addr + LANCE_ADDR); |
| 1127 | outw(0x0004, dev->base_addr + LANCE_DATA); |
| 1128 | lance_restart(dev, 0x0002, 0); |
| 1129 | } |
| 1130 | } |
| 1131 | |
| 1132 | /* Clear any other interrupt, and set interrupt enable. */ |
| 1133 | outw(0x0000, dev->base_addr + LANCE_ADDR); |
| 1134 | outw(0x7940, dev->base_addr + LANCE_DATA); |
| 1135 | |
| 1136 | if (lance_debug > 4) |
| 1137 | printk("%s: exiting interrupt, csr%d=%#4.4x.\n", |
| 1138 | dev->name, inw(ioaddr + LANCE_ADDR), |
| 1139 | inw(dev->base_addr + LANCE_DATA)); |
| 1140 | |
| 1141 | spin_unlock (&lp->devlock); |
| 1142 | return IRQ_HANDLED; |
| 1143 | } |
| 1144 | |
| 1145 | static int |
| 1146 | lance_rx(struct net_device *dev) |
| 1147 | { |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 1148 | struct lance_private *lp = dev->ml_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | int entry = lp->cur_rx & RX_RING_MOD_MASK; |
| 1150 | int i; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | /* If we own the next entry, it's a new packet. Send it up. */ |
| 1153 | while (lp->rx_ring[entry].base >= 0) { |
| 1154 | int status = lp->rx_ring[entry].base >> 24; |
| 1155 | |
| 1156 | if (status != 0x03) { /* There was an error. */ |
| 1157 | /* There is a tricky error noted by John Murphy, |
| 1158 | <murf@perftech.com> to Russ Nelson: Even with full-sized |
| 1159 | buffers it's possible for a jabber packet to use two |
| 1160 | buffers, with only the last correctly noting the error. */ |
| 1161 | if (status & 0x01) /* Only count a general error at the */ |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 1162 | dev->stats.rx_errors++; /* end of a packet.*/ |
| 1163 | if (status & 0x20) |
| 1164 | dev->stats.rx_frame_errors++; |
| 1165 | if (status & 0x10) |
| 1166 | dev->stats.rx_over_errors++; |
| 1167 | if (status & 0x08) |
| 1168 | dev->stats.rx_crc_errors++; |
| 1169 | if (status & 0x04) |
| 1170 | dev->stats.rx_fifo_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | lp->rx_ring[entry].base &= 0x03ffffff; |
| 1172 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1173 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | { |
| 1175 | /* Malloc up new buffer, compatible with net3. */ |
| 1176 | short pkt_len = (lp->rx_ring[entry].msg_length & 0xfff)-4; |
| 1177 | struct sk_buff *skb; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | if(pkt_len<60) |
| 1180 | { |
| 1181 | printk("%s: Runt packet!\n",dev->name); |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 1182 | dev->stats.rx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | } |
| 1184 | else |
| 1185 | { |
| 1186 | skb = dev_alloc_skb(pkt_len+2); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1187 | if (skb == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | { |
| 1189 | printk("%s: Memory squeeze, deferring packet.\n", dev->name); |
| 1190 | for (i=0; i < RX_RING_SIZE; i++) |
| 1191 | if (lp->rx_ring[(entry+i) & RX_RING_MOD_MASK].base < 0) |
| 1192 | break; |
| 1193 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1194 | if (i > RX_RING_SIZE -2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | { |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 1196 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | lp->rx_ring[entry].base |= 0x80000000; |
| 1198 | lp->cur_rx++; |
| 1199 | } |
| 1200 | break; |
| 1201 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | skb_reserve(skb,2); /* 16 byte align */ |
| 1203 | skb_put(skb,pkt_len); /* Make room */ |
David S. Miller | 8c7b7fa | 2007-07-10 22:08:12 -0700 | [diff] [blame] | 1204 | skb_copy_to_linear_data(skb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | (unsigned char *)isa_bus_to_virt((lp->rx_ring[entry].base & 0x00ffffff)), |
David S. Miller | 8c7b7fa | 2007-07-10 22:08:12 -0700 | [diff] [blame] | 1206 | pkt_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | skb->protocol=eth_type_trans(skb,dev); |
| 1208 | netif_rx(skb); |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 1209 | dev->stats.rx_packets++; |
| 1210 | dev->stats.rx_bytes += pkt_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | } |
| 1212 | } |
| 1213 | /* The docs say that the buffer length isn't touched, but Andrew Boyd |
| 1214 | of QNX reports that some revs of the 79C965 clear it. */ |
| 1215 | lp->rx_ring[entry].buf_length = -PKT_BUF_SZ; |
| 1216 | lp->rx_ring[entry].base |= 0x80000000; |
| 1217 | entry = (++lp->cur_rx) & RX_RING_MOD_MASK; |
| 1218 | } |
| 1219 | |
| 1220 | /* We should check that at least two ring entries are free. If not, |
| 1221 | we should free one and mark stats->rx_dropped++. */ |
| 1222 | |
| 1223 | return 0; |
| 1224 | } |
| 1225 | |
| 1226 | static int |
| 1227 | lance_close(struct net_device *dev) |
| 1228 | { |
| 1229 | int ioaddr = dev->base_addr; |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 1230 | struct lance_private *lp = dev->ml_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | |
| 1232 | netif_stop_queue (dev); |
| 1233 | |
| 1234 | if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) { |
| 1235 | outw(112, ioaddr+LANCE_ADDR); |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 1236 | dev->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | } |
| 1238 | outw(0, ioaddr+LANCE_ADDR); |
| 1239 | |
| 1240 | if (lance_debug > 1) |
| 1241 | printk("%s: Shutting down ethercard, status was %2.2x.\n", |
| 1242 | dev->name, inw(ioaddr+LANCE_DATA)); |
| 1243 | |
| 1244 | /* We stop the LANCE here -- it occasionally polls |
| 1245 | memory if we don't. */ |
| 1246 | outw(0x0004, ioaddr+LANCE_DATA); |
| 1247 | |
| 1248 | if (dev->dma != 4) |
| 1249 | { |
| 1250 | unsigned long flags=claim_dma_lock(); |
| 1251 | disable_dma(dev->dma); |
| 1252 | release_dma_lock(flags); |
| 1253 | } |
| 1254 | free_irq(dev->irq, dev); |
| 1255 | |
| 1256 | lance_purge_ring(dev); |
| 1257 | |
| 1258 | return 0; |
| 1259 | } |
| 1260 | |
| 1261 | static struct net_device_stats *lance_get_stats(struct net_device *dev) |
| 1262 | { |
Wang Chen | c010360 | 2008-11-20 04:05:56 -0800 | [diff] [blame] | 1263 | struct lance_private *lp = dev->ml_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | |
| 1265 | if (chip_table[lp->chip_version].flags & LANCE_HAS_MISSED_FRAME) { |
| 1266 | short ioaddr = dev->base_addr; |
| 1267 | short saved_addr; |
| 1268 | unsigned long flags; |
| 1269 | |
| 1270 | spin_lock_irqsave(&lp->devlock, flags); |
| 1271 | saved_addr = inw(ioaddr+LANCE_ADDR); |
| 1272 | outw(112, ioaddr+LANCE_ADDR); |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 1273 | dev->stats.rx_missed_errors = inw(ioaddr+LANCE_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | outw(saved_addr, ioaddr+LANCE_ADDR); |
| 1275 | spin_unlock_irqrestore(&lp->devlock, flags); |
| 1276 | } |
| 1277 | |
Kulikov Vasiliy | 7bfba0b | 2010-07-05 02:14:03 +0000 | [diff] [blame] | 1278 | return &dev->stats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | } |
| 1280 | |
| 1281 | /* Set or clear the multicast filter for this adaptor. |
| 1282 | */ |
| 1283 | |
| 1284 | static void set_multicast_list(struct net_device *dev) |
| 1285 | { |
| 1286 | short ioaddr = dev->base_addr; |
| 1287 | |
| 1288 | outw(0, ioaddr+LANCE_ADDR); |
| 1289 | outw(0x0004, ioaddr+LANCE_DATA); /* Temporarily stop the lance. */ |
| 1290 | |
| 1291 | if (dev->flags&IFF_PROMISC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | outw(15, ioaddr+LANCE_ADDR); |
| 1293 | outw(0x8000, ioaddr+LANCE_DATA); /* Set promiscuous mode */ |
| 1294 | } else { |
| 1295 | short multicast_table[4]; |
| 1296 | int i; |
Jiri Pirko | 4cd24ea | 2010-02-08 04:30:35 +0000 | [diff] [blame] | 1297 | int num_addrs=netdev_mc_count(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | if(dev->flags&IFF_ALLMULTI) |
| 1299 | num_addrs=1; |
| 1300 | /* FIXIT: We don't use the multicast table, but rely on upper-layer filtering. */ |
| 1301 | memset(multicast_table, (num_addrs == 0) ? 0 : -1, sizeof(multicast_table)); |
| 1302 | for (i = 0; i < 4; i++) { |
| 1303 | outw(8 + i, ioaddr+LANCE_ADDR); |
| 1304 | outw(multicast_table[i], ioaddr+LANCE_DATA); |
| 1305 | } |
| 1306 | outw(15, ioaddr+LANCE_ADDR); |
| 1307 | outw(0x0000, ioaddr+LANCE_DATA); /* Unset promiscuous mode */ |
| 1308 | } |
| 1309 | |
| 1310 | lance_restart(dev, 0x0142, 0); /* Resume normal operation */ |
| 1311 | |
| 1312 | } |
| 1313 | |