1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* lanai.c -- Copyright 1999-2003 by Mitchell Blank Jr <mitch@sfgoth.com> 3 * 4 * This driver supports ATM cards based on the Efficient "Lanai" 5 * chipset such as the Speedstream 3010 and the ENI-25p. The 6 * Speedstream 3060 is currently not supported since we don't 7 * have the code to drive the on-board Alcatel DSL chipset (yet). 8 * 9 * Thanks to Efficient for supporting this project with hardware, 10 * documentation, and by answering my questions. 11 * 12 * Things not working yet: 13 * 14 * o We don't support the Speedstream 3060 yet - this card has 15 * an on-board DSL modem chip by Alcatel and the driver will 16 * need some extra code added to handle it 17 * 18 * o Note that due to limitations of the Lanai only one VCC can be 19 * in CBR at once 20 * 21 * o We don't currently parse the EEPROM at all. The code is all 22 * there as per the spec, but it doesn't actually work. I think 23 * there may be some issues with the docs. Anyway, do NOT 24 * enable it yet - bugs in that code may actually damage your 25 * hardware! Because of this you should hardware an ESI before 26 * trying to use this in a LANE or MPOA environment. 27 * 28 * o AAL0 is stubbed in but the actual rx/tx path isn't written yet: 29 * vcc_tx_aal0() needs to send or queue a SKB 30 * vcc_tx_unqueue_aal0() needs to attempt to send queued SKBs 31 * vcc_rx_aal0() needs to handle AAL0 interrupts 32 * This isn't too much work - I just wanted to get other things 33 * done first. 34 * 35 * o lanai_change_qos() isn't written yet 36 * 37 * o There aren't any ioctl's yet -- I'd like to eventually support 38 * setting loopback and LED modes that way. 39 * 40 * o If the segmentation engine or DMA gets shut down we should restart 41 * card as per section 17.0i. (see lanai_reset) 42 * 43 * o setsockopt(SO_CIRANGE) isn't done (although despite what the 44 * API says it isn't exactly commonly implemented) 45 */ 46 47 /* Version history: 48 * v.1.00 -- 26-JUL-2003 -- PCI/DMA updates 49 * v.0.02 -- 11-JAN-2000 -- Endian fixes 50 * v.0.01 -- 30-NOV-1999 -- Initial release 51 */ 52 53 #include <linux/module.h> 54 #include <linux/slab.h> 55 #include <linux/mm.h> 56 #include <linux/atmdev.h> 57 #include <asm/io.h> 58 #include <asm/byteorder.h> 59 #include <linux/spinlock.h> 60 #include <linux/pci.h> 61 #include <linux/dma-mapping.h> 62 #include <linux/init.h> 63 #include <linux/delay.h> 64 #include <linux/interrupt.h> 65 66 /* -------------------- TUNABLE PARAMATERS: */ 67 68 /* 69 * Maximum number of VCIs per card. Setting it lower could theoretically 70 * save some memory, but since we allocate our vcc list with get_free_pages, 71 * it's not really likely for most architectures 72 */ 73 #define NUM_VCI (1024) 74 75 /* 76 * Enable extra debugging 77 */ 78 #define DEBUG 79 /* 80 * Debug _all_ register operations with card, except the memory test. 81 * Also disables the timed poll to prevent extra chattiness. This 82 * isn't for normal use 83 */ 84 #undef DEBUG_RW 85 86 /* 87 * The programming guide specifies a full test of the on-board SRAM 88 * at initialization time. Undefine to remove this 89 */ 90 #define FULL_MEMORY_TEST 91 92 /* 93 * This is the number of (4 byte) service entries that we will 94 * try to allocate at startup. Note that we will end up with 95 * one PAGE_SIZE's worth regardless of what this is set to 96 */ 97 #define SERVICE_ENTRIES (1024) 98 /* TODO: make above a module load-time option */ 99 100 /* 101 * We normally read the onboard EEPROM in order to discover our MAC 102 * address. Undefine to _not_ do this 103 */ 104 /* #define READ_EEPROM */ /* ***DONT ENABLE YET*** */ 105 /* TODO: make above a module load-time option (also) */ 106 107 /* 108 * Depth of TX fifo (in 128 byte units; range 2-31) 109 * Smaller numbers are better for network latency 110 * Larger numbers are better for PCI latency 111 * I'm really sure where the best tradeoff is, but the BSD driver uses 112 * 7 and it seems to work ok. 113 */ 114 #define TX_FIFO_DEPTH (7) 115 /* TODO: make above a module load-time option */ 116 117 /* 118 * How often (in jiffies) we will try to unstick stuck connections - 119 * shouldn't need to happen much 120 */ 121 #define LANAI_POLL_PERIOD (10*HZ) 122 /* TODO: make above a module load-time option */ 123 124 /* 125 * When allocating an AAL5 receiving buffer, try to make it at least 126 * large enough to hold this many max_sdu sized PDUs 127 */ 128 #define AAL5_RX_MULTIPLIER (3) 129 /* TODO: make above a module load-time option */ 130 131 /* 132 * Same for transmitting buffer 133 */ 134 #define AAL5_TX_MULTIPLIER (3) 135 /* TODO: make above a module load-time option */ 136 137 /* 138 * When allocating an AAL0 transmiting buffer, how many cells should fit. 139 * Remember we'll end up with a PAGE_SIZE of them anyway, so this isn't 140 * really critical 141 */ 142 #define AAL0_TX_MULTIPLIER (40) 143 /* TODO: make above a module load-time option */ 144 145 /* 146 * How large should we make the AAL0 receiving buffer. Remember that this 147 * is shared between all AAL0 VC's 148 */ 149 #define AAL0_RX_BUFFER_SIZE (PAGE_SIZE) 150 /* TODO: make above a module load-time option */ 151 152 /* 153 * Should we use Lanai's "powerdown" feature when no vcc's are bound? 154 */ 155 /* #define USE_POWERDOWN */ 156 /* TODO: make above a module load-time option (also) */ 157 158 /* -------------------- DEBUGGING AIDS: */ 159 160 #define DEV_LABEL "lanai" 161 162 #ifdef DEBUG 163 164 #define DPRINTK(format, args...) \ 165 printk(KERN_DEBUG DEV_LABEL ": " format, ##args) 166 #define APRINTK(truth, format, args...) \ 167 do { \ 168 if (unlikely(!(truth))) \ 169 printk(KERN_ERR DEV_LABEL ": " format, ##args); \ 170 } while (0) 171 172 #else /* !DEBUG */ 173 174 #define DPRINTK(format, args...) 175 #define APRINTK(truth, format, args...) 176 177 #endif /* DEBUG */ 178 179 #ifdef DEBUG_RW 180 #define RWDEBUG(format, args...) \ 181 printk(KERN_DEBUG DEV_LABEL ": " format, ##args) 182 #else /* !DEBUG_RW */ 183 #define RWDEBUG(format, args...) 184 #endif 185 186 /* -------------------- DATA DEFINITIONS: */ 187 188 #define LANAI_MAPPING_SIZE (0x40000) 189 #define LANAI_EEPROM_SIZE (128) 190 191 typedef int vci_t; 192 typedef void __iomem *bus_addr_t; 193 194 /* DMA buffer in host memory for TX, RX, or service list. */ 195 struct lanai_buffer { 196 u32 *start; /* From get_free_pages */ 197 u32 *end; /* One past last byte */ 198 u32 *ptr; /* Pointer to current host location */ 199 dma_addr_t dmaaddr; 200 }; 201 202 struct lanai_vcc_stats { 203 unsigned rx_nomem; 204 union { 205 struct { 206 unsigned rx_badlen; 207 unsigned service_trash; 208 unsigned service_stream; 209 unsigned service_rxcrc; 210 } aal5; 211 struct { 212 } aal0; 213 } x; 214 }; 215 216 struct lanai_dev; /* Forward declaration */ 217 218 /* 219 * This is the card-specific per-vcc data. Note that unlike some other 220 * drivers there is NOT a 1-to-1 correspondance between these and 221 * atm_vcc's - each one of these represents an actual 2-way vcc, but 222 * an atm_vcc can be 1-way and share with a 1-way vcc in the other 223 * direction. To make it weirder, there can even be 0-way vccs 224 * bound to us, waiting to do a change_qos 225 */ 226 struct lanai_vcc { 227 bus_addr_t vbase; /* Base of VCC's registers */ 228 struct lanai_vcc_stats stats; 229 int nref; /* # of atm_vcc's who reference us */ 230 vci_t vci; 231 struct { 232 struct lanai_buffer buf; 233 struct atm_vcc *atmvcc; /* atm_vcc who is receiver */ 234 } rx; 235 struct { 236 struct lanai_buffer buf; 237 struct atm_vcc *atmvcc; /* atm_vcc who is transmitter */ 238 int endptr; /* last endptr from service entry */ 239 struct sk_buff_head backlog; 240 void (*unqueue)(struct lanai_dev *, struct lanai_vcc *, int); 241 } tx; 242 }; 243 244 enum lanai_type { 245 lanai2 = PCI_DEVICE_ID_EF_ATM_LANAI2, 246 lanaihb = PCI_DEVICE_ID_EF_ATM_LANAIHB 247 }; 248 249 struct lanai_dev_stats { 250 unsigned ovfl_trash; /* # of cells dropped - buffer overflow */ 251 unsigned vci_trash; /* # of cells dropped - closed vci */ 252 unsigned hec_err; /* # of cells dropped - bad HEC */ 253 unsigned atm_ovfl; /* # of cells dropped - rx fifo overflow */ 254 unsigned pcierr_parity_detect; 255 unsigned pcierr_serr_set; 256 unsigned pcierr_master_abort; 257 unsigned pcierr_m_target_abort; 258 unsigned pcierr_s_target_abort; 259 unsigned pcierr_master_parity; 260 unsigned service_notx; 261 unsigned service_norx; 262 unsigned service_rxnotaal5; 263 unsigned dma_reenable; 264 unsigned card_reset; 265 }; 266 267 struct lanai_dev { 268 bus_addr_t base; 269 struct lanai_dev_stats stats; 270 struct lanai_buffer service; 271 struct lanai_vcc **vccs; 272 #ifdef USE_POWERDOWN 273 int nbound; /* number of bound vccs */ 274 #endif 275 enum lanai_type type; 276 vci_t num_vci; /* Currently just NUM_VCI */ 277 u8 eeprom[LANAI_EEPROM_SIZE]; 278 u32 serialno, magicno; 279 struct pci_dev *pci; 280 DECLARE_BITMAP(backlog_vccs, NUM_VCI); /* VCCs with tx backlog */ 281 DECLARE_BITMAP(transmit_ready, NUM_VCI); /* VCCs with transmit space */ 282 struct timer_list timer; 283 int naal0; 284 struct lanai_buffer aal0buf; /* AAL0 RX buffers */ 285 u32 conf1, conf2; /* CONFIG[12] registers */ 286 u32 status; /* STATUS register */ 287 spinlock_t endtxlock; 288 spinlock_t servicelock; 289 struct atm_vcc *cbrvcc; 290 int number; 291 int board_rev; 292 /* TODO - look at race conditions with maintence of conf1/conf2 */ 293 /* TODO - transmit locking: should we use _irq not _irqsave? */ 294 /* TODO - organize above in some rational fashion (see <asm/cache.h>) */ 295 }; 296 297 /* 298 * Each device has two bitmaps for each VCC (baclog_vccs and transmit_ready) 299 * This function iterates one of these, calling a given function for each 300 * vci with their bit set 301 */ 302 static void vci_bitfield_iterate(struct lanai_dev *lanai, 303 const unsigned long *lp, 304 void (*func)(struct lanai_dev *,vci_t vci)) 305 { 306 vci_t vci; 307 308 for_each_set_bit(vci, lp, NUM_VCI) 309 func(lanai, vci); 310 } 311 312 /* -------------------- BUFFER UTILITIES: */ 313 314 /* 315 * Lanai needs DMA buffers aligned to 256 bytes of at least 1024 bytes - 316 * usually any page allocation will do. Just to be safe in case 317 * PAGE_SIZE is insanely tiny, though... 318 */ 319 #define LANAI_PAGE_SIZE ((PAGE_SIZE >= 1024) ? PAGE_SIZE : 1024) 320 321 /* 322 * Allocate a buffer in host RAM for service list, RX, or TX 323 * Returns buf->start==NULL if no memory 324 * Note that the size will be rounded up 2^n bytes, and 325 * if we can't allocate that we'll settle for something smaller 326 * until minbytes 327 */ 328 static void lanai_buf_allocate(struct lanai_buffer *buf, 329 size_t bytes, size_t minbytes, struct pci_dev *pci) 330 { 331 int size; 332 333 if (bytes > (128 * 1024)) /* max lanai buffer size */ 334 bytes = 128 * 1024; 335 for (size = LANAI_PAGE_SIZE; size < bytes; size *= 2) 336 ; 337 if (minbytes < LANAI_PAGE_SIZE) 338 minbytes = LANAI_PAGE_SIZE; 339 do { 340 /* 341 * Technically we could use non-consistent mappings for 342 * everything, but the way the lanai uses DMA memory would 343 * make that a terrific pain. This is much simpler. 344 */ 345 buf->start = dma_alloc_coherent(&pci->dev, 346 size, &buf->dmaaddr, GFP_KERNEL); 347 if (buf->start != NULL) { /* Success */ 348 /* Lanai requires 256-byte alignment of DMA bufs */ 349 APRINTK((buf->dmaaddr & ~0xFFFFFF00) == 0, 350 "bad dmaaddr: 0x%lx\n", 351 (unsigned long) buf->dmaaddr); 352 buf->ptr = buf->start; 353 buf->end = (u32 *) 354 (&((unsigned char *) buf->start)[size]); 355 memset(buf->start, 0, size); 356 break; 357 } 358 size /= 2; 359 } while (size >= minbytes); 360 } 361 362 /* size of buffer in bytes */ 363 static inline size_t lanai_buf_size(const struct lanai_buffer *buf) 364 { 365 return ((unsigned long) buf->end) - ((unsigned long) buf->start); 366 } 367 368 static void lanai_buf_deallocate(struct lanai_buffer *buf, 369 struct pci_dev *pci) 370 { 371 if (buf->start != NULL) { 372 dma_free_coherent(&pci->dev, lanai_buf_size(buf), 373 buf->start, buf->dmaaddr); 374 buf->start = buf->end = buf->ptr = NULL; 375 } 376 } 377 378 /* size of buffer as "card order" (0=1k .. 7=128k) */ 379 static int lanai_buf_size_cardorder(const struct lanai_buffer *buf) 380 { 381 int order = get_order(lanai_buf_size(buf)) + (PAGE_SHIFT - 10); 382 383 /* This can only happen if PAGE_SIZE is gigantic, but just in case */ 384 if (order > 7) 385 order = 7; 386 return order; 387 } 388 389 /* -------------------- PORT I/O UTILITIES: */ 390 391 /* Registers (and their bit-fields) */ 392 enum lanai_register { 393 Reset_Reg = 0x00, /* Reset; read for chip type; bits: */ 394 #define RESET_GET_BOARD_REV(x) (((x)>> 0)&0x03) /* Board revision */ 395 #define RESET_GET_BOARD_ID(x) (((x)>> 2)&0x03) /* Board ID */ 396 #define BOARD_ID_LANAI256 (0) /* 25.6M adapter card */ 397 Endian_Reg = 0x04, /* Endian setting */ 398 IntStatus_Reg = 0x08, /* Interrupt status */ 399 IntStatusMasked_Reg = 0x0C, /* Interrupt status (masked) */ 400 IntAck_Reg = 0x10, /* Interrupt acknowledge */ 401 IntAckMasked_Reg = 0x14, /* Interrupt acknowledge (masked) */ 402 IntStatusSet_Reg = 0x18, /* Get status + enable/disable */ 403 IntStatusSetMasked_Reg = 0x1C, /* Get status + en/di (masked) */ 404 IntControlEna_Reg = 0x20, /* Interrupt control enable */ 405 IntControlDis_Reg = 0x24, /* Interrupt control disable */ 406 Status_Reg = 0x28, /* Status */ 407 #define STATUS_PROMDATA (0x00000001) /* PROM_DATA pin */ 408 #define STATUS_WAITING (0x00000002) /* Interrupt being delayed */ 409 #define STATUS_SOOL (0x00000004) /* SOOL alarm */ 410 #define STATUS_LOCD (0x00000008) /* LOCD alarm */ 411 #define STATUS_LED (0x00000010) /* LED (HAPPI) output */ 412 #define STATUS_GPIN (0x00000020) /* GPIN pin */ 413 #define STATUS_BUTTBUSY (0x00000040) /* Butt register is pending */ 414 Config1_Reg = 0x2C, /* Config word 1; bits: */ 415 #define CONFIG1_PROMDATA (0x00000001) /* PROM_DATA pin */ 416 #define CONFIG1_PROMCLK (0x00000002) /* PROM_CLK pin */ 417 #define CONFIG1_SET_READMODE(x) ((x)*0x004) /* PCI BM reads; values: */ 418 #define READMODE_PLAIN (0) /* Plain memory read */ 419 #define READMODE_LINE (2) /* Memory read line */ 420 #define READMODE_MULTIPLE (3) /* Memory read multiple */ 421 #define CONFIG1_DMA_ENABLE (0x00000010) /* Turn on DMA */ 422 #define CONFIG1_POWERDOWN (0x00000020) /* Turn off clocks */ 423 #define CONFIG1_SET_LOOPMODE(x) ((x)*0x080) /* Clock&loop mode; values: */ 424 #define LOOPMODE_NORMAL (0) /* Normal - no loop */ 425 #define LOOPMODE_TIME (1) 426 #define LOOPMODE_DIAG (2) 427 #define LOOPMODE_LINE (3) 428 #define CONFIG1_MASK_LOOPMODE (0x00000180) 429 #define CONFIG1_SET_LEDMODE(x) ((x)*0x0200) /* Mode of LED; values: */ 430 #define LEDMODE_NOT_SOOL (0) /* !SOOL */ 431 #define LEDMODE_OFF (1) /* 0 */ 432 #define LEDMODE_ON (2) /* 1 */ 433 #define LEDMODE_NOT_LOCD (3) /* !LOCD */ 434 #define LEDMORE_GPIN (4) /* GPIN */ 435 #define LEDMODE_NOT_GPIN (7) /* !GPIN */ 436 #define CONFIG1_MASK_LEDMODE (0x00000E00) 437 #define CONFIG1_GPOUT1 (0x00001000) /* Toggle for reset */ 438 #define CONFIG1_GPOUT2 (0x00002000) /* Loopback PHY */ 439 #define CONFIG1_GPOUT3 (0x00004000) /* Loopback lanai */ 440 Config2_Reg = 0x30, /* Config word 2; bits: */ 441 #define CONFIG2_HOWMANY (0x00000001) /* >512 VCIs? */ 442 #define CONFIG2_PTI7_MODE (0x00000002) /* Make PTI=7 RM, not OAM */ 443 #define CONFIG2_VPI_CHK_DIS (0x00000004) /* Ignore RX VPI value */ 444 #define CONFIG2_HEC_DROP (0x00000008) /* Drop cells w/ HEC errors */ 445 #define CONFIG2_VCI0_NORMAL (0x00000010) /* Treat VCI=0 normally */ 446 #define CONFIG2_CBR_ENABLE (0x00000020) /* Deal with CBR traffic */ 447 #define CONFIG2_TRASH_ALL (0x00000040) /* Trashing incoming cells */ 448 #define CONFIG2_TX_DISABLE (0x00000080) /* Trashing outgoing cells */ 449 #define CONFIG2_SET_TRASH (0x00000100) /* Turn trashing on */ 450 Statistics_Reg = 0x34, /* Statistics; bits: */ 451 #define STATS_GET_FIFO_OVFL(x) (((x)>> 0)&0xFF) /* FIFO overflowed */ 452 #define STATS_GET_HEC_ERR(x) (((x)>> 8)&0xFF) /* HEC was bad */ 453 #define STATS_GET_BAD_VCI(x) (((x)>>16)&0xFF) /* VCI not open */ 454 #define STATS_GET_BUF_OVFL(x) (((x)>>24)&0xFF) /* VCC buffer full */ 455 ServiceStuff_Reg = 0x38, /* Service stuff; bits: */ 456 #define SSTUFF_SET_SIZE(x) ((x)*0x20000000) /* size of service buffer */ 457 #define SSTUFF_SET_ADDR(x) ((x)>>8) /* set address of buffer */ 458 ServWrite_Reg = 0x3C, /* ServWrite Pointer */ 459 ServRead_Reg = 0x40, /* ServRead Pointer */ 460 TxDepth_Reg = 0x44, /* FIFO Transmit Depth */ 461 Butt_Reg = 0x48, /* Butt register */ 462 CBR_ICG_Reg = 0x50, 463 CBR_PTR_Reg = 0x54, 464 PingCount_Reg = 0x58, /* Ping count */ 465 DMA_Addr_Reg = 0x5C /* DMA address */ 466 }; 467 468 static inline bus_addr_t reg_addr(const struct lanai_dev *lanai, 469 enum lanai_register reg) 470 { 471 return lanai->base + reg; 472 } 473 474 static inline u32 reg_read(const struct lanai_dev *lanai, 475 enum lanai_register reg) 476 { 477 u32 t; 478 t = readl(reg_addr(lanai, reg)); 479 RWDEBUG("R [0x%08X] 0x%02X = 0x%08X\n", (unsigned int) lanai->base, 480 (int) reg, t); 481 return t; 482 } 483 484 static inline void reg_write(const struct lanai_dev *lanai, u32 val, 485 enum lanai_register reg) 486 { 487 RWDEBUG("W [0x%08X] 0x%02X < 0x%08X\n", (unsigned int) lanai->base, 488 (int) reg, val); 489 writel(val, reg_addr(lanai, reg)); 490 } 491 492 static inline void conf1_write(const struct lanai_dev *lanai) 493 { 494 reg_write(lanai, lanai->conf1, Config1_Reg); 495 } 496 497 static inline void conf2_write(const struct lanai_dev *lanai) 498 { 499 reg_write(lanai, lanai->conf2, Config2_Reg); 500 } 501 502 /* Same as conf2_write(), but defers I/O if we're powered down */ 503 static inline void conf2_write_if_powerup(const struct lanai_dev *lanai) 504 { 505 #ifdef USE_POWERDOWN 506 if (unlikely((lanai->conf1 & CONFIG1_POWERDOWN) != 0)) 507 return; 508 #endif /* USE_POWERDOWN */ 509 conf2_write(lanai); 510 } 511 512 static inline void reset_board(const struct lanai_dev *lanai) 513 { 514 DPRINTK("about to reset board\n"); 515 reg_write(lanai, 0, Reset_Reg); 516 /* 517 * If we don't delay a little while here then we can end up 518 * leaving the card in a VERY weird state and lock up the 519 * PCI bus. This isn't documented anywhere but I've convinced 520 * myself after a lot of painful experimentation 521 */ 522 udelay(5); 523 } 524 525 /* -------------------- CARD SRAM UTILITIES: */ 526 527 /* The SRAM is mapped into normal PCI memory space - the only catch is 528 * that it is only 16-bits wide but must be accessed as 32-bit. The 529 * 16 high bits will be zero. We don't hide this, since they get 530 * programmed mostly like discrete registers anyway 531 */ 532 #define SRAM_START (0x20000) 533 #define SRAM_BYTES (0x20000) /* Again, half don't really exist */ 534 535 static inline bus_addr_t sram_addr(const struct lanai_dev *lanai, int offset) 536 { 537 return lanai->base + SRAM_START + offset; 538 } 539 540 static inline u32 sram_read(const struct lanai_dev *lanai, int offset) 541 { 542 return readl(sram_addr(lanai, offset)); 543 } 544 545 static inline void sram_write(const struct lanai_dev *lanai, 546 u32 val, int offset) 547 { 548 writel(val, sram_addr(lanai, offset)); 549 } 550 551 static int sram_test_word(const struct lanai_dev *lanai, int offset, 552 u32 pattern) 553 { 554 u32 readback; 555 sram_write(lanai, pattern, offset); 556 readback = sram_read(lanai, offset); 557 if (likely(readback == pattern)) 558 return 0; 559 printk(KERN_ERR DEV_LABEL 560 "(itf %d): SRAM word at %d bad: wrote 0x%X, read 0x%X\n", 561 lanai->number, offset, 562 (unsigned int) pattern, (unsigned int) readback); 563 return -EIO; 564 } 565 566 static int sram_test_pass(const struct lanai_dev *lanai, u32 pattern) 567 { 568 int offset, result = 0; 569 for (offset = 0; offset < SRAM_BYTES && result == 0; offset += 4) 570 result = sram_test_word(lanai, offset, pattern); 571 return result; 572 } 573 574 static int sram_test_and_clear(const struct lanai_dev *lanai) 575 { 576 #ifdef FULL_MEMORY_TEST 577 int result; 578 DPRINTK("testing SRAM\n"); 579 if ((result = sram_test_pass(lanai, 0x5555)) != 0) 580 return result; 581 if ((result = sram_test_pass(lanai, 0xAAAA)) != 0) 582 return result; 583 #endif 584 DPRINTK("clearing SRAM\n"); 585 return sram_test_pass(lanai, 0x0000); 586 } 587 588 /* -------------------- CARD-BASED VCC TABLE UTILITIES: */ 589 590 /* vcc table */ 591 enum lanai_vcc_offset { 592 vcc_rxaddr1 = 0x00, /* Location1, plus bits: */ 593 #define RXADDR1_SET_SIZE(x) ((x)*0x0000100) /* size of RX buffer */ 594 #define RXADDR1_SET_RMMODE(x) ((x)*0x00800) /* RM cell action; values: */ 595 #define RMMODE_TRASH (0) /* discard */ 596 #define RMMODE_PRESERVE (1) /* input as AAL0 */ 597 #define RMMODE_PIPE (2) /* pipe to coscheduler */ 598 #define RMMODE_PIPEALL (3) /* pipe non-RM too */ 599 #define RXADDR1_OAM_PRESERVE (0x00002000) /* Input OAM cells as AAL0 */ 600 #define RXADDR1_SET_MODE(x) ((x)*0x0004000) /* Reassembly mode */ 601 #define RXMODE_TRASH (0) /* discard */ 602 #define RXMODE_AAL0 (1) /* non-AAL5 mode */ 603 #define RXMODE_AAL5 (2) /* AAL5, intr. each PDU */ 604 #define RXMODE_AAL5_STREAM (3) /* AAL5 w/o per-PDU intr */ 605 vcc_rxaddr2 = 0x04, /* Location2 */ 606 vcc_rxcrc1 = 0x08, /* RX CRC claculation space */ 607 vcc_rxcrc2 = 0x0C, 608 vcc_rxwriteptr = 0x10, /* RX writeptr, plus bits: */ 609 #define RXWRITEPTR_LASTEFCI (0x00002000) /* Last PDU had EFCI bit */ 610 #define RXWRITEPTR_DROPPING (0x00004000) /* Had error, dropping */ 611 #define RXWRITEPTR_TRASHING (0x00008000) /* Trashing */ 612 vcc_rxbufstart = 0x14, /* RX bufstart, plus bits: */ 613 #define RXBUFSTART_CLP (0x00004000) 614 #define RXBUFSTART_CI (0x00008000) 615 vcc_rxreadptr = 0x18, /* RX readptr */ 616 vcc_txicg = 0x1C, /* TX ICG */ 617 vcc_txaddr1 = 0x20, /* Location1, plus bits: */ 618 #define TXADDR1_SET_SIZE(x) ((x)*0x0000100) /* size of TX buffer */ 619 #define TXADDR1_ABR (0x00008000) /* use ABR (doesn't work) */ 620 vcc_txaddr2 = 0x24, /* Location2 */ 621 vcc_txcrc1 = 0x28, /* TX CRC claculation space */ 622 vcc_txcrc2 = 0x2C, 623 vcc_txreadptr = 0x30, /* TX Readptr, plus bits: */ 624 #define TXREADPTR_GET_PTR(x) ((x)&0x01FFF) 625 #define TXREADPTR_MASK_DELTA (0x0000E000) /* ? */ 626 vcc_txendptr = 0x34, /* TX Endptr, plus bits: */ 627 #define TXENDPTR_CLP (0x00002000) 628 #define TXENDPTR_MASK_PDUMODE (0x0000C000) /* PDU mode; values: */ 629 #define PDUMODE_AAL0 (0*0x04000) 630 #define PDUMODE_AAL5 (2*0x04000) 631 #define PDUMODE_AAL5STREAM (3*0x04000) 632 vcc_txwriteptr = 0x38, /* TX Writeptr */ 633 #define TXWRITEPTR_GET_PTR(x) ((x)&0x1FFF) 634 vcc_txcbr_next = 0x3C /* # of next CBR VCI in ring */ 635 #define TXCBR_NEXT_BOZO (0x00008000) /* "bozo bit" */ 636 }; 637 638 #define CARDVCC_SIZE (0x40) 639 640 static inline bus_addr_t cardvcc_addr(const struct lanai_dev *lanai, 641 vci_t vci) 642 { 643 return sram_addr(lanai, vci * CARDVCC_SIZE); 644 } 645 646 static inline u32 cardvcc_read(const struct lanai_vcc *lvcc, 647 enum lanai_vcc_offset offset) 648 { 649 u32 val; 650 APRINTK(lvcc->vbase != NULL, "cardvcc_read: unbound vcc!\n"); 651 val= readl(lvcc->vbase + offset); 652 RWDEBUG("VR vci=%04d 0x%02X = 0x%08X\n", 653 lvcc->vci, (int) offset, val); 654 return val; 655 } 656 657 static inline void cardvcc_write(const struct lanai_vcc *lvcc, 658 u32 val, enum lanai_vcc_offset offset) 659 { 660 APRINTK(lvcc->vbase != NULL, "cardvcc_write: unbound vcc!\n"); 661 APRINTK((val & ~0xFFFF) == 0, 662 "cardvcc_write: bad val 0x%X (vci=%d, addr=0x%02X)\n", 663 (unsigned int) val, lvcc->vci, (unsigned int) offset); 664 RWDEBUG("VW vci=%04d 0x%02X > 0x%08X\n", 665 lvcc->vci, (unsigned int) offset, (unsigned int) val); 666 writel(val, lvcc->vbase + offset); 667 } 668 669 /* -------------------- COMPUTE SIZE OF AN AAL5 PDU: */ 670 671 /* How many bytes will an AAL5 PDU take to transmit - remember that: 672 * o we need to add 8 bytes for length, CPI, UU, and CRC 673 * o we need to round up to 48 bytes for cells 674 */ 675 static inline int aal5_size(int size) 676 { 677 int cells = (size + 8 + 47) / 48; 678 return cells * 48; 679 } 680 681 /* -------------------- FREE AN ATM SKB: */ 682 683 static inline void lanai_free_skb(struct atm_vcc *atmvcc, struct sk_buff *skb) 684 { 685 if (atmvcc->pop != NULL) 686 atmvcc->pop(atmvcc, skb); 687 else 688 dev_kfree_skb_any(skb); 689 } 690 691 /* -------------------- TURN VCCS ON AND OFF: */ 692 693 static void host_vcc_start_rx(const struct lanai_vcc *lvcc) 694 { 695 u32 addr1; 696 if (lvcc->rx.atmvcc->qos.aal == ATM_AAL5) { 697 dma_addr_t dmaaddr = lvcc->rx.buf.dmaaddr; 698 cardvcc_write(lvcc, 0xFFFF, vcc_rxcrc1); 699 cardvcc_write(lvcc, 0xFFFF, vcc_rxcrc2); 700 cardvcc_write(lvcc, 0, vcc_rxwriteptr); 701 cardvcc_write(lvcc, 0, vcc_rxbufstart); 702 cardvcc_write(lvcc, 0, vcc_rxreadptr); 703 cardvcc_write(lvcc, (dmaaddr >> 16) & 0xFFFF, vcc_rxaddr2); 704 addr1 = ((dmaaddr >> 8) & 0xFF) | 705 RXADDR1_SET_SIZE(lanai_buf_size_cardorder(&lvcc->rx.buf))| 706 RXADDR1_SET_RMMODE(RMMODE_TRASH) | /* ??? */ 707 /* RXADDR1_OAM_PRESERVE | --- no OAM support yet */ 708 RXADDR1_SET_MODE(RXMODE_AAL5); 709 } else 710 addr1 = RXADDR1_SET_RMMODE(RMMODE_PRESERVE) | /* ??? */ 711 RXADDR1_OAM_PRESERVE | /* ??? */ 712 RXADDR1_SET_MODE(RXMODE_AAL0); 713 /* This one must be last! */ 714 cardvcc_write(lvcc, addr1, vcc_rxaddr1); 715 } 716 717 static void host_vcc_start_tx(const struct lanai_vcc *lvcc) 718 { 719 dma_addr_t dmaaddr = lvcc->tx.buf.dmaaddr; 720 cardvcc_write(lvcc, 0, vcc_txicg); 721 cardvcc_write(lvcc, 0xFFFF, vcc_txcrc1); 722 cardvcc_write(lvcc, 0xFFFF, vcc_txcrc2); 723 cardvcc_write(lvcc, 0, vcc_txreadptr); 724 cardvcc_write(lvcc, 0, vcc_txendptr); 725 cardvcc_write(lvcc, 0, vcc_txwriteptr); 726 cardvcc_write(lvcc, 727 (lvcc->tx.atmvcc->qos.txtp.traffic_class == ATM_CBR) ? 728 TXCBR_NEXT_BOZO | lvcc->vci : 0, vcc_txcbr_next); 729 cardvcc_write(lvcc, (dmaaddr >> 16) & 0xFFFF, vcc_txaddr2); 730 cardvcc_write(lvcc, 731 ((dmaaddr >> 8) & 0xFF) | 732 TXADDR1_SET_SIZE(lanai_buf_size_cardorder(&lvcc->tx.buf)), 733 vcc_txaddr1); 734 } 735 736 /* Shutdown receiving on card */ 737 static void lanai_shutdown_rx_vci(const struct lanai_vcc *lvcc) 738 { 739 if (lvcc->vbase == NULL) /* We were never bound to a VCI */ 740 return; 741 /* 15.1.1 - set to trashing, wait one cell time (15us) */ 742 cardvcc_write(lvcc, 743 RXADDR1_SET_RMMODE(RMMODE_TRASH) | 744 RXADDR1_SET_MODE(RXMODE_TRASH), vcc_rxaddr1); 745 udelay(15); 746 /* 15.1.2 - clear rest of entries */ 747 cardvcc_write(lvcc, 0, vcc_rxaddr2); 748 cardvcc_write(lvcc, 0, vcc_rxcrc1); 749 cardvcc_write(lvcc, 0, vcc_rxcrc2); 750 cardvcc_write(lvcc, 0, vcc_rxwriteptr); 751 cardvcc_write(lvcc, 0, vcc_rxbufstart); 752 cardvcc_write(lvcc, 0, vcc_rxreadptr); 753 } 754 755 /* Shutdown transmitting on card. 756 * Unfortunately the lanai needs us to wait until all the data 757 * drains out of the buffer before we can dealloc it, so this 758 * can take awhile -- up to 370ms for a full 128KB buffer 759 * assuming everone else is quiet. In theory the time is 760 * boundless if there's a CBR VCC holding things up. 761 */ 762 static void lanai_shutdown_tx_vci(struct lanai_dev *lanai, 763 struct lanai_vcc *lvcc) 764 { 765 struct sk_buff *skb; 766 unsigned long flags, timeout; 767 int read, write, lastread = -1; 768 769 if (lvcc->vbase == NULL) /* We were never bound to a VCI */ 770 return; 771 /* 15.2.1 - wait for queue to drain */ 772 while ((skb = skb_dequeue(&lvcc->tx.backlog)) != NULL) 773 lanai_free_skb(lvcc->tx.atmvcc, skb); 774 read_lock_irqsave(&vcc_sklist_lock, flags); 775 __clear_bit(lvcc->vci, lanai->backlog_vccs); 776 read_unlock_irqrestore(&vcc_sklist_lock, flags); 777 /* 778 * We need to wait for the VCC to drain but don't wait forever. We 779 * give each 1K of buffer size 1/128th of a second to clear out. 780 * TODO: maybe disable CBR if we're about to timeout? 781 */ 782 timeout = jiffies + 783 (((lanai_buf_size(&lvcc->tx.buf) / 1024) * HZ) >> 7); 784 write = TXWRITEPTR_GET_PTR(cardvcc_read(lvcc, vcc_txwriteptr)); 785 for (;;) { 786 read = TXREADPTR_GET_PTR(cardvcc_read(lvcc, vcc_txreadptr)); 787 if (read == write && /* Is TX buffer empty? */ 788 (lvcc->tx.atmvcc->qos.txtp.traffic_class != ATM_CBR || 789 (cardvcc_read(lvcc, vcc_txcbr_next) & 790 TXCBR_NEXT_BOZO) == 0)) 791 break; 792 if (read != lastread) { /* Has there been any progress? */ 793 lastread = read; 794 timeout += HZ / 10; 795 } 796 if (unlikely(time_after(jiffies, timeout))) { 797 printk(KERN_ERR DEV_LABEL "(itf %d): Timed out on " 798 "backlog closing vci %d\n", 799 lvcc->tx.atmvcc->dev->number, lvcc->vci); 800 DPRINTK("read, write = %d, %d\n", read, write); 801 break; 802 } 803 msleep(40); 804 } 805 /* 15.2.2 - clear out all tx registers */ 806 cardvcc_write(lvcc, 0, vcc_txreadptr); 807 cardvcc_write(lvcc, 0, vcc_txwriteptr); 808 cardvcc_write(lvcc, 0, vcc_txendptr); 809 cardvcc_write(lvcc, 0, vcc_txcrc1); 810 cardvcc_write(lvcc, 0, vcc_txcrc2); 811 cardvcc_write(lvcc, 0, vcc_txaddr2); 812 cardvcc_write(lvcc, 0, vcc_txaddr1); 813 } 814 815 /* -------------------- MANAGING AAL0 RX BUFFER: */ 816 817 static inline int aal0_buffer_allocate(struct lanai_dev *lanai) 818 { 819 DPRINTK("aal0_buffer_allocate: allocating AAL0 RX buffer\n"); 820 lanai_buf_allocate(&lanai->aal0buf, AAL0_RX_BUFFER_SIZE, 80, 821 lanai->pci); 822 return (lanai->aal0buf.start == NULL) ? -ENOMEM : 0; 823 } 824 825 static inline void aal0_buffer_free(struct lanai_dev *lanai) 826 { 827 DPRINTK("aal0_buffer_allocate: freeing AAL0 RX buffer\n"); 828 lanai_buf_deallocate(&lanai->aal0buf, lanai->pci); 829 } 830 831 /* -------------------- EEPROM UTILITIES: */ 832 833 /* Offsets of data in the EEPROM */ 834 #define EEPROM_COPYRIGHT (0) 835 #define EEPROM_COPYRIGHT_LEN (44) 836 #define EEPROM_CHECKSUM (62) 837 #define EEPROM_CHECKSUM_REV (63) 838 #define EEPROM_MAC (64) 839 #define EEPROM_MAC_REV (70) 840 #define EEPROM_SERIAL (112) 841 #define EEPROM_SERIAL_REV (116) 842 #define EEPROM_MAGIC (120) 843 #define EEPROM_MAGIC_REV (124) 844 845 #define EEPROM_MAGIC_VALUE (0x5AB478D2) 846 847 #ifndef READ_EEPROM 848 849 /* Stub functions to use if EEPROM reading is disabled */ 850 static int eeprom_read(struct lanai_dev *lanai) 851 { 852 printk(KERN_INFO DEV_LABEL "(itf %d): *NOT* reading EEPROM\n", 853 lanai->number); 854 memset(&lanai->eeprom[EEPROM_MAC], 0, 6); 855 return 0; 856 } 857 858 static int eeprom_validate(struct lanai_dev *lanai) 859 { 860 lanai->serialno = 0; 861 lanai->magicno = EEPROM_MAGIC_VALUE; 862 return 0; 863 } 864 865 #else /* READ_EEPROM */ 866 867 static int eeprom_read(struct lanai_dev *lanai) 868 { 869 int i, address; 870 u8 data; 871 u32 tmp; 872 #define set_config1(x) do { lanai->conf1 = x; conf1_write(lanai); \ 873 } while (0) 874 #define clock_h() set_config1(lanai->conf1 | CONFIG1_PROMCLK) 875 #define clock_l() set_config1(lanai->conf1 &~ CONFIG1_PROMCLK) 876 #define data_h() set_config1(lanai->conf1 | CONFIG1_PROMDATA) 877 #define data_l() set_config1(lanai->conf1 &~ CONFIG1_PROMDATA) 878 #define pre_read() do { data_h(); clock_h(); udelay(5); } while (0) 879 #define read_pin() (reg_read(lanai, Status_Reg) & STATUS_PROMDATA) 880 #define send_stop() do { data_l(); udelay(5); clock_h(); udelay(5); \ 881 data_h(); udelay(5); } while (0) 882 /* start with both clock and data high */ 883 data_h(); clock_h(); udelay(5); 884 for (address = 0; address < LANAI_EEPROM_SIZE; address++) { 885 data = (address << 1) | 1; /* Command=read + address */ 886 /* send start bit */ 887 data_l(); udelay(5); 888 clock_l(); udelay(5); 889 for (i = 128; i != 0; i >>= 1) { /* write command out */ 890 tmp = (lanai->conf1 & ~CONFIG1_PROMDATA) | 891 ((data & i) ? CONFIG1_PROMDATA : 0); 892 if (lanai->conf1 != tmp) { 893 set_config1(tmp); 894 udelay(5); /* Let new data settle */ 895 } 896 clock_h(); udelay(5); clock_l(); udelay(5); 897 } 898 /* look for ack */ 899 data_h(); clock_h(); udelay(5); 900 if (read_pin() != 0) 901 goto error; /* No ack seen */ 902 clock_l(); udelay(5); 903 /* read back result */ 904 for (data = 0, i = 7; i >= 0; i--) { 905 data_h(); clock_h(); udelay(5); 906 data = (data << 1) | !!read_pin(); 907 clock_l(); udelay(5); 908 } 909 /* look again for ack */ 910 data_h(); clock_h(); udelay(5); 911 if (read_pin() == 0) 912 goto error; /* Spurious ack */ 913 clock_l(); udelay(5); 914 send_stop(); 915 lanai->eeprom[address] = data; 916 DPRINTK("EEPROM 0x%04X %02X\n", 917 (unsigned int) address, (unsigned int) data); 918 } 919 return 0; 920 error: 921 clock_l(); udelay(5); /* finish read */ 922 send_stop(); 923 printk(KERN_ERR DEV_LABEL "(itf %d): error reading EEPROM byte %d\n", 924 lanai->number, address); 925 return -EIO; 926 #undef set_config1 927 #undef clock_h 928 #undef clock_l 929 #undef data_h 930 #undef data_l 931 #undef pre_read 932 #undef read_pin 933 #undef send_stop 934 } 935 936 /* read a big-endian 4-byte value out of eeprom */ 937 static inline u32 eeprom_be4(const struct lanai_dev *lanai, int address) 938 { 939 return be32_to_cpup((const u32 *) &lanai->eeprom[address]); 940 } 941 942 /* Checksum/validate EEPROM contents */ 943 static int eeprom_validate(struct lanai_dev *lanai) 944 { 945 int i, s; 946 u32 v; 947 const u8 *e = lanai->eeprom; 948 #ifdef DEBUG 949 /* First, see if we can get an ASCIIZ string out of the copyright */ 950 for (i = EEPROM_COPYRIGHT; 951 i < (EEPROM_COPYRIGHT + EEPROM_COPYRIGHT_LEN); i++) 952 if (e[i] < 0x20 || e[i] > 0x7E) 953 break; 954 if ( i != EEPROM_COPYRIGHT && 955 i != EEPROM_COPYRIGHT + EEPROM_COPYRIGHT_LEN && e[i] == '\0') 956 DPRINTK("eeprom: copyright = \"%s\"\n", 957 (char *) &e[EEPROM_COPYRIGHT]); 958 else 959 DPRINTK("eeprom: copyright not found\n"); 960 #endif 961 /* Validate checksum */ 962 for (i = s = 0; i < EEPROM_CHECKSUM; i++) 963 s += e[i]; 964 s &= 0xFF; 965 if (s != e[EEPROM_CHECKSUM]) { 966 printk(KERN_ERR DEV_LABEL "(itf %d): EEPROM checksum bad " 967 "(wanted 0x%02X, got 0x%02X)\n", lanai->number, 968 (unsigned int) s, (unsigned int) e[EEPROM_CHECKSUM]); 969 return -EIO; 970 } 971 s ^= 0xFF; 972 if (s != e[EEPROM_CHECKSUM_REV]) { 973 printk(KERN_ERR DEV_LABEL "(itf %d): EEPROM inverse checksum " 974 "bad (wanted 0x%02X, got 0x%02X)\n", lanai->number, 975 (unsigned int) s, (unsigned int) e[EEPROM_CHECKSUM_REV]); 976 return -EIO; 977 } 978 /* Verify MAC address */ 979 for (i = 0; i < 6; i++) 980 if ((e[EEPROM_MAC + i] ^ e[EEPROM_MAC_REV + i]) != 0xFF) { 981 printk(KERN_ERR DEV_LABEL 982 "(itf %d) : EEPROM MAC addresses don't match " 983 "(0x%02X, inverse 0x%02X)\n", lanai->number, 984 (unsigned int) e[EEPROM_MAC + i], 985 (unsigned int) e[EEPROM_MAC_REV + i]); 986 return -EIO; 987 } 988 DPRINTK("eeprom: MAC address = %pM\n", &e[EEPROM_MAC]); 989 /* Verify serial number */ 990 lanai->serialno = eeprom_be4(lanai, EEPROM_SERIAL); 991 v = eeprom_be4(lanai, EEPROM_SERIAL_REV); 992 if ((lanai->serialno ^ v) != 0xFFFFFFFF) { 993 printk(KERN_ERR DEV_LABEL "(itf %d): EEPROM serial numbers " 994 "don't match (0x%08X, inverse 0x%08X)\n", lanai->number, 995 (unsigned int) lanai->serialno, (unsigned int) v); 996 return -EIO; 997 } 998 DPRINTK("eeprom: Serial number = %d\n", (unsigned int) lanai->serialno); 999 /* Verify magic number */ 1000 lanai->magicno = eeprom_be4(lanai, EEPROM_MAGIC); 1001 v = eeprom_be4(lanai, EEPROM_MAGIC_REV); 1002 if ((lanai->magicno ^ v) != 0xFFFFFFFF) { 1003 printk(KERN_ERR DEV_LABEL "(itf %d): EEPROM magic numbers " 1004 "don't match (0x%08X, inverse 0x%08X)\n", lanai->number, 1005 lanai->magicno, v); 1006 return -EIO; 1007 } 1008 DPRINTK("eeprom: Magic number = 0x%08X\n", lanai->magicno); 1009 if (lanai->magicno != EEPROM_MAGIC_VALUE) 1010 printk(KERN_WARNING DEV_LABEL "(itf %d): warning - EEPROM " 1011 "magic not what expected (got 0x%08X, not 0x%08X)\n", 1012 lanai->number, (unsigned int) lanai->magicno, 1013 (unsigned int) EEPROM_MAGIC_VALUE); 1014 return 0; 1015 } 1016 1017 #endif /* READ_EEPROM */ 1018 1019 static inline const u8 *eeprom_mac(const struct lanai_dev *lanai) 1020 { 1021 return &lanai->eeprom[EEPROM_MAC]; 1022 } 1023 1024 /* -------------------- INTERRUPT HANDLING UTILITIES: */ 1025 1026 /* Interrupt types */ 1027 #define INT_STATS (0x00000002) /* Statistics counter overflow */ 1028 #define INT_SOOL (0x00000004) /* SOOL changed state */ 1029 #define INT_LOCD (0x00000008) /* LOCD changed state */ 1030 #define INT_LED (0x00000010) /* LED (HAPPI) changed state */ 1031 #define INT_GPIN (0x00000020) /* GPIN changed state */ 1032 #define INT_PING (0x00000040) /* PING_COUNT fulfilled */ 1033 #define INT_WAKE (0x00000080) /* Lanai wants bus */ 1034 #define INT_CBR0 (0x00000100) /* CBR sched hit VCI 0 */ 1035 #define INT_LOCK (0x00000200) /* Service list overflow */ 1036 #define INT_MISMATCH (0x00000400) /* TX magic list mismatch */ 1037 #define INT_AAL0_STR (0x00000800) /* Non-AAL5 buffer half filled */ 1038 #define INT_AAL0 (0x00001000) /* Non-AAL5 data available */ 1039 #define INT_SERVICE (0x00002000) /* Service list entries available */ 1040 #define INT_TABORTSENT (0x00004000) /* Target abort sent by lanai */ 1041 #define INT_TABORTBM (0x00008000) /* Abort rcv'd as bus master */ 1042 #define INT_TIMEOUTBM (0x00010000) /* No response to bus master */ 1043 #define INT_PCIPARITY (0x00020000) /* Parity error on PCI */ 1044 1045 /* Sets of the above */ 1046 #define INT_ALL (0x0003FFFE) /* All interrupts */ 1047 #define INT_STATUS (0x0000003C) /* Some status pin changed */ 1048 #define INT_DMASHUT (0x00038000) /* DMA engine got shut down */ 1049 #define INT_SEGSHUT (0x00000700) /* Segmentation got shut down */ 1050 1051 static inline u32 intr_pending(const struct lanai_dev *lanai) 1052 { 1053 return reg_read(lanai, IntStatusMasked_Reg); 1054 } 1055 1056 static inline void intr_enable(const struct lanai_dev *lanai, u32 i) 1057 { 1058 reg_write(lanai, i, IntControlEna_Reg); 1059 } 1060 1061 static inline void intr_disable(const struct lanai_dev *lanai, u32 i) 1062 { 1063 reg_write(lanai, i, IntControlDis_Reg); 1064 } 1065 1066 /* -------------------- CARD/PCI STATUS: */ 1067 1068 static void status_message(int itf, const char *name, int status) 1069 { 1070 static const char *onoff[2] = { "off to on", "on to off" }; 1071 printk(KERN_INFO DEV_LABEL "(itf %d): %s changed from %s\n", 1072 itf, name, onoff[!status]); 1073 } 1074 1075 static void lanai_check_status(struct lanai_dev *lanai) 1076 { 1077 u32 new = reg_read(lanai, Status_Reg); 1078 u32 changes = new ^ lanai->status; 1079 lanai->status = new; 1080 #define e(flag, name) \ 1081 if (changes & flag) \ 1082 status_message(lanai->number, name, new & flag) 1083 e(STATUS_SOOL, "SOOL"); 1084 e(STATUS_LOCD, "LOCD"); 1085 e(STATUS_LED, "LED"); 1086 e(STATUS_GPIN, "GPIN"); 1087 #undef e 1088 } 1089 1090 static void pcistatus_got(int itf, const char *name) 1091 { 1092 printk(KERN_INFO DEV_LABEL "(itf %d): PCI got %s error\n", itf, name); 1093 } 1094 1095 static void pcistatus_check(struct lanai_dev *lanai, int clearonly) 1096 { 1097 u16 s; 1098 int result; 1099 result = pci_read_config_word(lanai->pci, PCI_STATUS, &s); 1100 if (result != PCIBIOS_SUCCESSFUL) { 1101 printk(KERN_ERR DEV_LABEL "(itf %d): can't read PCI_STATUS: " 1102 "%d\n", lanai->number, result); 1103 return; 1104 } 1105 s &= PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | 1106 PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_REC_TARGET_ABORT | 1107 PCI_STATUS_SIG_TARGET_ABORT | PCI_STATUS_PARITY; 1108 if (s == 0) 1109 return; 1110 result = pci_write_config_word(lanai->pci, PCI_STATUS, s); 1111 if (result != PCIBIOS_SUCCESSFUL) 1112 printk(KERN_ERR DEV_LABEL "(itf %d): can't write PCI_STATUS: " 1113 "%d\n", lanai->number, result); 1114 if (clearonly) 1115 return; 1116 #define e(flag, name, stat) \ 1117 if (s & flag) { \ 1118 pcistatus_got(lanai->number, name); \ 1119 ++lanai->stats.pcierr_##stat; \ 1120 } 1121 e(PCI_STATUS_DETECTED_PARITY, "parity", parity_detect); 1122 e(PCI_STATUS_SIG_SYSTEM_ERROR, "signalled system", serr_set); 1123 e(PCI_STATUS_REC_MASTER_ABORT, "master", master_abort); 1124 e(PCI_STATUS_REC_TARGET_ABORT, "master target", m_target_abort); 1125 e(PCI_STATUS_SIG_TARGET_ABORT, "slave", s_target_abort); 1126 e(PCI_STATUS_PARITY, "master parity", master_parity); 1127 #undef e 1128 } 1129 1130 /* -------------------- VCC TX BUFFER UTILITIES: */ 1131 1132 /* space left in tx buffer in bytes */ 1133 static inline int vcc_tx_space(const struct lanai_vcc *lvcc, int endptr) 1134 { 1135 int r; 1136 r = endptr * 16; 1137 r -= ((unsigned long) lvcc->tx.buf.ptr) - 1138 ((unsigned long) lvcc->tx.buf.start); 1139 r -= 16; /* Leave "bubble" - if start==end it looks empty */ 1140 if (r < 0) 1141 r += lanai_buf_size(&lvcc->tx.buf); 1142 return r; 1143 } 1144 1145 /* test if VCC is currently backlogged */ 1146 static inline int vcc_is_backlogged(const struct lanai_vcc *lvcc) 1147 { 1148 return !skb_queue_empty(&lvcc->tx.backlog); 1149 } 1150 1151 /* Bit fields in the segmentation buffer descriptor */ 1152 #define DESCRIPTOR_MAGIC (0xD0000000) 1153 #define DESCRIPTOR_AAL5 (0x00008000) 1154 #define DESCRIPTOR_AAL5_STREAM (0x00004000) 1155 #define DESCRIPTOR_CLP (0x00002000) 1156 1157 /* Add 32-bit descriptor with its padding */ 1158 static inline void vcc_tx_add_aal5_descriptor(struct lanai_vcc *lvcc, 1159 u32 flags, int len) 1160 { 1161 int pos; 1162 APRINTK((((unsigned long) lvcc->tx.buf.ptr) & 15) == 0, 1163 "vcc_tx_add_aal5_descriptor: bad ptr=%p\n", lvcc->tx.buf.ptr); 1164 lvcc->tx.buf.ptr += 4; /* Hope the values REALLY don't matter */ 1165 pos = ((unsigned char *) lvcc->tx.buf.ptr) - 1166 (unsigned char *) lvcc->tx.buf.start; 1167 APRINTK((pos & ~0x0001FFF0) == 0, 1168 "vcc_tx_add_aal5_descriptor: bad pos (%d) before, vci=%d, " 1169 "start,ptr,end=%p,%p,%p\n", pos, lvcc->vci, 1170 lvcc->tx.buf.start, lvcc->tx.buf.ptr, lvcc->tx.buf.end); 1171 pos = (pos + len) & (lanai_buf_size(&lvcc->tx.buf) - 1); 1172 APRINTK((pos & ~0x0001FFF0) == 0, 1173 "vcc_tx_add_aal5_descriptor: bad pos (%d) after, vci=%d, " 1174 "start,ptr,end=%p,%p,%p\n", pos, lvcc->vci, 1175 lvcc->tx.buf.start, lvcc->tx.buf.ptr, lvcc->tx.buf.end); 1176 lvcc->tx.buf.ptr[-1] = 1177 cpu_to_le32(DESCRIPTOR_MAGIC | DESCRIPTOR_AAL5 | 1178 ((lvcc->tx.atmvcc->atm_options & ATM_ATMOPT_CLP) ? 1179 DESCRIPTOR_CLP : 0) | flags | pos >> 4); 1180 if (lvcc->tx.buf.ptr >= lvcc->tx.buf.end) 1181 lvcc->tx.buf.ptr = lvcc->tx.buf.start; 1182 } 1183 1184 /* Add 32-bit AAL5 trailer and leave room for its CRC */ 1185 static inline void vcc_tx_add_aal5_trailer(struct lanai_vcc *lvcc, 1186 int len, int cpi, int uu) 1187 { 1188 APRINTK((((unsigned long) lvcc->tx.buf.ptr) & 15) == 8, 1189 "vcc_tx_add_aal5_trailer: bad ptr=%p\n", lvcc->tx.buf.ptr); 1190 lvcc->tx.buf.ptr += 2; 1191 lvcc->tx.buf.ptr[-2] = cpu_to_be32((uu << 24) | (cpi << 16) | len); 1192 if (lvcc->tx.buf.ptr >= lvcc->tx.buf.end) 1193 lvcc->tx.buf.ptr = lvcc->tx.buf.start; 1194 } 1195 1196 static inline void vcc_tx_memcpy(struct lanai_vcc *lvcc, 1197 const unsigned char *src, int n) 1198 { 1199 unsigned char *e; 1200 int m; 1201 e = ((unsigned char *) lvcc->tx.buf.ptr) + n; 1202 m = e - (unsigned char *) lvcc->tx.buf.end; 1203 if (m < 0) 1204 m = 0; 1205 memcpy(lvcc->tx.buf.ptr, src, n - m); 1206 if (m != 0) { 1207 memcpy(lvcc->tx.buf.start, src + n - m, m); 1208 e = ((unsigned char *) lvcc->tx.buf.start) + m; 1209 } 1210 lvcc->tx.buf.ptr = (u32 *) e; 1211 } 1212 1213 static inline void vcc_tx_memzero(struct lanai_vcc *lvcc, int n) 1214 { 1215 unsigned char *e; 1216 int m; 1217 if (n == 0) 1218 return; 1219 e = ((unsigned char *) lvcc->tx.buf.ptr) + n; 1220 m = e - (unsigned char *) lvcc->tx.buf.end; 1221 if (m < 0) 1222 m = 0; 1223 memset(lvcc->tx.buf.ptr, 0, n - m); 1224 if (m != 0) { 1225 memset(lvcc->tx.buf.start, 0, m); 1226 e = ((unsigned char *) lvcc->tx.buf.start) + m; 1227 } 1228 lvcc->tx.buf.ptr = (u32 *) e; 1229 } 1230 1231 /* Update "butt" register to specify new WritePtr */ 1232 static inline void lanai_endtx(struct lanai_dev *lanai, 1233 const struct lanai_vcc *lvcc) 1234 { 1235 int i, ptr = ((unsigned char *) lvcc->tx.buf.ptr) - 1236 (unsigned char *) lvcc->tx.buf.start; 1237 APRINTK((ptr & ~0x0001FFF0) == 0, 1238 "lanai_endtx: bad ptr (%d), vci=%d, start,ptr,end=%p,%p,%p\n", 1239 ptr, lvcc->vci, lvcc->tx.buf.start, lvcc->tx.buf.ptr, 1240 lvcc->tx.buf.end); 1241 1242 /* 1243 * Since the "butt register" is a shared resounce on the card we 1244 * serialize all accesses to it through this spinlock. This is 1245 * mostly just paranoia since the register is rarely "busy" anyway 1246 * but is needed for correctness. 1247 */ 1248 spin_lock(&lanai->endtxlock); 1249 /* 1250 * We need to check if the "butt busy" bit is set before 1251 * updating the butt register. In theory this should 1252 * never happen because the ATM card is plenty fast at 1253 * updating the register. Still, we should make sure 1254 */ 1255 for (i = 0; reg_read(lanai, Status_Reg) & STATUS_BUTTBUSY; i++) { 1256 if (unlikely(i > 50)) { 1257 printk(KERN_ERR DEV_LABEL "(itf %d): butt register " 1258 "always busy!\n", lanai->number); 1259 break; 1260 } 1261 udelay(5); 1262 } 1263 /* 1264 * Before we tall the card to start work we need to be sure 100% of 1265 * the info in the service buffer has been written before we tell 1266 * the card about it 1267 */ 1268 wmb(); 1269 reg_write(lanai, (ptr << 12) | lvcc->vci, Butt_Reg); 1270 spin_unlock(&lanai->endtxlock); 1271 } 1272 1273 /* 1274 * Add one AAL5 PDU to lvcc's transmit buffer. Caller garauntees there's 1275 * space available. "pdusize" is the number of bytes the PDU will take 1276 */ 1277 static void lanai_send_one_aal5(struct lanai_dev *lanai, 1278 struct lanai_vcc *lvcc, struct sk_buff *skb, int pdusize) 1279 { 1280 int pad; 1281 APRINTK(pdusize == aal5_size(skb->len), 1282 "lanai_send_one_aal5: wrong size packet (%d != %d)\n", 1283 pdusize, aal5_size(skb->len)); 1284 vcc_tx_add_aal5_descriptor(lvcc, 0, pdusize); 1285 pad = pdusize - skb->len - 8; 1286 APRINTK(pad >= 0, "pad is negative (%d)\n", pad); 1287 APRINTK(pad < 48, "pad is too big (%d)\n", pad); 1288 vcc_tx_memcpy(lvcc, skb->data, skb->len); 1289 vcc_tx_memzero(lvcc, pad); 1290 vcc_tx_add_aal5_trailer(lvcc, skb->len, 0, 0); 1291 lanai_endtx(lanai, lvcc); 1292 lanai_free_skb(lvcc->tx.atmvcc, skb); 1293 atomic_inc(&lvcc->tx.atmvcc->stats->tx); 1294 } 1295 1296 /* Try to fill the buffer - don't call unless there is backlog */ 1297 static void vcc_tx_unqueue_aal5(struct lanai_dev *lanai, 1298 struct lanai_vcc *lvcc, int endptr) 1299 { 1300 int n; 1301 struct sk_buff *skb; 1302 int space = vcc_tx_space(lvcc, endptr); 1303 APRINTK(vcc_is_backlogged(lvcc), 1304 "vcc_tx_unqueue() called with empty backlog (vci=%d)\n", 1305 lvcc->vci); 1306 while (space >= 64) { 1307 skb = skb_dequeue(&lvcc->tx.backlog); 1308 if (skb == NULL) 1309 goto no_backlog; 1310 n = aal5_size(skb->len); 1311 if (n + 16 > space) { 1312 /* No room for this packet - put it back on queue */ 1313 skb_queue_head(&lvcc->tx.backlog, skb); 1314 return; 1315 } 1316 lanai_send_one_aal5(lanai, lvcc, skb, n); 1317 space -= n + 16; 1318 } 1319 if (!vcc_is_backlogged(lvcc)) { 1320 no_backlog: 1321 __clear_bit(lvcc->vci, lanai->backlog_vccs); 1322 } 1323 } 1324 1325 /* Given an skb that we want to transmit either send it now or queue */ 1326 static void vcc_tx_aal5(struct lanai_dev *lanai, struct lanai_vcc *lvcc, 1327 struct sk_buff *skb) 1328 { 1329 int space, n; 1330 if (vcc_is_backlogged(lvcc)) /* Already backlogged */ 1331 goto queue_it; 1332 space = vcc_tx_space(lvcc, 1333 TXREADPTR_GET_PTR(cardvcc_read(lvcc, vcc_txreadptr))); 1334 n = aal5_size(skb->len); 1335 APRINTK(n + 16 >= 64, "vcc_tx_aal5: n too small (%d)\n", n); 1336 if (space < n + 16) { /* No space for this PDU */ 1337 __set_bit(lvcc->vci, lanai->backlog_vccs); 1338 queue_it: 1339 skb_queue_tail(&lvcc->tx.backlog, skb); 1340 return; 1341 } 1342 lanai_send_one_aal5(lanai, lvcc, skb, n); 1343 } 1344 1345 static void vcc_tx_unqueue_aal0(struct lanai_dev *lanai, 1346 struct lanai_vcc *lvcc, int endptr) 1347 { 1348 printk(KERN_INFO DEV_LABEL 1349 ": vcc_tx_unqueue_aal0: not implemented\n"); 1350 } 1351 1352 static void vcc_tx_aal0(struct lanai_dev *lanai, struct lanai_vcc *lvcc, 1353 struct sk_buff *skb) 1354 { 1355 printk(KERN_INFO DEV_LABEL ": vcc_tx_aal0: not implemented\n"); 1356 /* Remember to increment lvcc->tx.atmvcc->stats->tx */ 1357 lanai_free_skb(lvcc->tx.atmvcc, skb); 1358 } 1359 1360 /* -------------------- VCC RX BUFFER UTILITIES: */ 1361 1362 /* unlike the _tx_ cousins, this doesn't update ptr */ 1363 static inline void vcc_rx_memcpy(unsigned char *dest, 1364 const struct lanai_vcc *lvcc, int n) 1365 { 1366 int m = ((const unsigned char *) lvcc->rx.buf.ptr) + n - 1367 ((const unsigned char *) (lvcc->rx.buf.end)); 1368 if (m < 0) 1369 m = 0; 1370 memcpy(dest, lvcc->rx.buf.ptr, n - m); 1371 memcpy(dest + n - m, lvcc->rx.buf.start, m); 1372 /* Make sure that these copies don't get reordered */ 1373 barrier(); 1374 } 1375 1376 /* Receive AAL5 data on a VCC with a particular endptr */ 1377 static void vcc_rx_aal5(struct lanai_vcc *lvcc, int endptr) 1378 { 1379 int size; 1380 struct sk_buff *skb; 1381 const u32 *x; 1382 u32 *end = &lvcc->rx.buf.start[endptr * 4]; 1383 int n = ((unsigned long) end) - ((unsigned long) lvcc->rx.buf.ptr); 1384 if (n < 0) 1385 n += lanai_buf_size(&lvcc->rx.buf); 1386 APRINTK(n >= 0 && n < lanai_buf_size(&lvcc->rx.buf) && !(n & 15), 1387 "vcc_rx_aal5: n out of range (%d/%zu)\n", 1388 n, lanai_buf_size(&lvcc->rx.buf)); 1389 /* Recover the second-to-last word to get true pdu length */ 1390 if ((x = &end[-2]) < lvcc->rx.buf.start) 1391 x = &lvcc->rx.buf.end[-2]; 1392 /* 1393 * Before we actually read from the buffer, make sure the memory 1394 * changes have arrived 1395 */ 1396 rmb(); 1397 size = be32_to_cpup(x) & 0xffff; 1398 if (unlikely(n != aal5_size(size))) { 1399 /* Make sure size matches padding */ 1400 printk(KERN_INFO DEV_LABEL "(itf %d): Got bad AAL5 length " 1401 "on vci=%d - size=%d n=%d\n", 1402 lvcc->rx.atmvcc->dev->number, lvcc->vci, size, n); 1403 lvcc->stats.x.aal5.rx_badlen++; 1404 goto out; 1405 } 1406 skb = atm_alloc_charge(lvcc->rx.atmvcc, size, GFP_ATOMIC); 1407 if (unlikely(skb == NULL)) { 1408 lvcc->stats.rx_nomem++; 1409 goto out; 1410 } 1411 skb_put(skb, size); 1412 vcc_rx_memcpy(skb->data, lvcc, size); 1413 ATM_SKB(skb)->vcc = lvcc->rx.atmvcc; 1414 __net_timestamp(skb); 1415 lvcc->rx.atmvcc->push(lvcc->rx.atmvcc, skb); 1416 atomic_inc(&lvcc->rx.atmvcc->stats->rx); 1417 out: 1418 lvcc->rx.buf.ptr = end; 1419 cardvcc_write(lvcc, endptr, vcc_rxreadptr); 1420 } 1421 1422 static void vcc_rx_aal0(struct lanai_dev *lanai) 1423 { 1424 printk(KERN_INFO DEV_LABEL ": vcc_rx_aal0: not implemented\n"); 1425 /* Remember to get read_lock(&vcc_sklist_lock) while looking up VC */ 1426 /* Remember to increment lvcc->rx.atmvcc->stats->rx */ 1427 } 1428 1429 /* -------------------- MANAGING HOST-BASED VCC TABLE: */ 1430 1431 /* Decide whether to use vmalloc or get_zeroed_page for VCC table */ 1432 #if (NUM_VCI * BITS_PER_LONG) <= PAGE_SIZE 1433 #define VCCTABLE_GETFREEPAGE 1434 #else 1435 #include <linux/vmalloc.h> 1436 #endif 1437 1438 static int vcc_table_allocate(struct lanai_dev *lanai) 1439 { 1440 #ifdef VCCTABLE_GETFREEPAGE 1441 APRINTK((lanai->num_vci) * sizeof(struct lanai_vcc *) <= PAGE_SIZE, 1442 "vcc table > PAGE_SIZE!"); 1443 lanai->vccs = (struct lanai_vcc **) get_zeroed_page(GFP_KERNEL); 1444 return (lanai->vccs == NULL) ? -ENOMEM : 0; 1445 #else 1446 int bytes = (lanai->num_vci) * sizeof(struct lanai_vcc *); 1447 lanai->vccs = vzalloc(bytes); 1448 if (unlikely(lanai->vccs == NULL)) 1449 return -ENOMEM; 1450 return 0; 1451 #endif 1452 } 1453 1454 static inline void vcc_table_deallocate(const struct lanai_dev *lanai) 1455 { 1456 #ifdef VCCTABLE_GETFREEPAGE 1457 free_page((unsigned long) lanai->vccs); 1458 #else 1459 vfree(lanai->vccs); 1460 #endif 1461 } 1462 1463 /* Allocate a fresh lanai_vcc, with the appropriate things cleared */ 1464 static inline struct lanai_vcc *new_lanai_vcc(void) 1465 { 1466 struct lanai_vcc *lvcc; 1467 lvcc = kzalloc(sizeof(*lvcc), GFP_KERNEL); 1468 if (likely(lvcc != NULL)) { 1469 skb_queue_head_init(&lvcc->tx.backlog); 1470 #ifdef DEBUG 1471 lvcc->vci = -1; 1472 #endif 1473 } 1474 return lvcc; 1475 } 1476 1477 static int lanai_get_sized_buffer(struct lanai_dev *lanai, 1478 struct lanai_buffer *buf, int max_sdu, int multiplier, 1479 const char *name) 1480 { 1481 int size; 1482 if (unlikely(max_sdu < 1)) 1483 max_sdu = 1; 1484 max_sdu = aal5_size(max_sdu); 1485 size = (max_sdu + 16) * multiplier + 16; 1486 lanai_buf_allocate(buf, size, max_sdu + 32, lanai->pci); 1487 if (unlikely(buf->start == NULL)) 1488 return -ENOMEM; 1489 if (unlikely(lanai_buf_size(buf) < size)) 1490 printk(KERN_WARNING DEV_LABEL "(itf %d): wanted %d bytes " 1491 "for %s buffer, got only %zu\n", lanai->number, size, 1492 name, lanai_buf_size(buf)); 1493 DPRINTK("Allocated %zu byte %s buffer\n", lanai_buf_size(buf), name); 1494 return 0; 1495 } 1496 1497 /* Setup a RX buffer for a currently unbound AAL5 vci */ 1498 static inline int lanai_setup_rx_vci_aal5(struct lanai_dev *lanai, 1499 struct lanai_vcc *lvcc, const struct atm_qos *qos) 1500 { 1501 return lanai_get_sized_buffer(lanai, &lvcc->rx.buf, 1502 qos->rxtp.max_sdu, AAL5_RX_MULTIPLIER, "RX"); 1503 } 1504 1505 /* Setup a TX buffer for a currently unbound AAL5 vci */ 1506 static int lanai_setup_tx_vci(struct lanai_dev *lanai, struct lanai_vcc *lvcc, 1507 const struct atm_qos *qos) 1508 { 1509 int max_sdu, multiplier; 1510 if (qos->aal == ATM_AAL0) { 1511 lvcc->tx.unqueue = vcc_tx_unqueue_aal0; 1512 max_sdu = ATM_CELL_SIZE - 1; 1513 multiplier = AAL0_TX_MULTIPLIER; 1514 } else { 1515 lvcc->tx.unqueue = vcc_tx_unqueue_aal5; 1516 max_sdu = qos->txtp.max_sdu; 1517 multiplier = AAL5_TX_MULTIPLIER; 1518 } 1519 return lanai_get_sized_buffer(lanai, &lvcc->tx.buf, max_sdu, 1520 multiplier, "TX"); 1521 } 1522 1523 static inline void host_vcc_bind(struct lanai_dev *lanai, 1524 struct lanai_vcc *lvcc, vci_t vci) 1525 { 1526 if (lvcc->vbase != NULL) 1527 return; /* We already were bound in the other direction */ 1528 DPRINTK("Binding vci %d\n", vci); 1529 #ifdef USE_POWERDOWN 1530 if (lanai->nbound++ == 0) { 1531 DPRINTK("Coming out of powerdown\n"); 1532 lanai->conf1 &= ~CONFIG1_POWERDOWN; 1533 conf1_write(lanai); 1534 conf2_write(lanai); 1535 } 1536 #endif 1537 lvcc->vbase = cardvcc_addr(lanai, vci); 1538 lanai->vccs[lvcc->vci = vci] = lvcc; 1539 } 1540 1541 static inline void host_vcc_unbind(struct lanai_dev *lanai, 1542 struct lanai_vcc *lvcc) 1543 { 1544 if (lvcc->vbase == NULL) 1545 return; /* This vcc was never bound */ 1546 DPRINTK("Unbinding vci %d\n", lvcc->vci); 1547 lvcc->vbase = NULL; 1548 lanai->vccs[lvcc->vci] = NULL; 1549 #ifdef USE_POWERDOWN 1550 if (--lanai->nbound == 0) { 1551 DPRINTK("Going into powerdown\n"); 1552 lanai->conf1 |= CONFIG1_POWERDOWN; 1553 conf1_write(lanai); 1554 } 1555 #endif 1556 } 1557 1558 /* -------------------- RESET CARD: */ 1559 1560 static void lanai_reset(struct lanai_dev *lanai) 1561 { 1562 printk(KERN_CRIT DEV_LABEL "(itf %d): *NOT* resetting - not " 1563 "implemented\n", lanai->number); 1564 /* TODO */ 1565 /* The following is just a hack until we write the real 1566 * resetter - at least ack whatever interrupt sent us 1567 * here 1568 */ 1569 reg_write(lanai, INT_ALL, IntAck_Reg); 1570 lanai->stats.card_reset++; 1571 } 1572 1573 /* -------------------- SERVICE LIST UTILITIES: */ 1574 1575 /* 1576 * Allocate service buffer and tell card about it 1577 */ 1578 static int service_buffer_allocate(struct lanai_dev *lanai) 1579 { 1580 lanai_buf_allocate(&lanai->service, SERVICE_ENTRIES * 4, 8, 1581 lanai->pci); 1582 if (unlikely(lanai->service.start == NULL)) 1583 return -ENOMEM; 1584 DPRINTK("allocated service buffer at %p, size %zu(%d)\n", 1585 lanai->service.start, 1586 lanai_buf_size(&lanai->service), 1587 lanai_buf_size_cardorder(&lanai->service)); 1588 /* Clear ServWrite register to be safe */ 1589 reg_write(lanai, 0, ServWrite_Reg); 1590 /* ServiceStuff register contains size and address of buffer */ 1591 reg_write(lanai, 1592 SSTUFF_SET_SIZE(lanai_buf_size_cardorder(&lanai->service)) | 1593 SSTUFF_SET_ADDR(lanai->service.dmaaddr), 1594 ServiceStuff_Reg); 1595 return 0; 1596 } 1597 1598 static inline void service_buffer_deallocate(struct lanai_dev *lanai) 1599 { 1600 lanai_buf_deallocate(&lanai->service, lanai->pci); 1601 } 1602 1603 /* Bitfields in service list */ 1604 #define SERVICE_TX (0x80000000) /* Was from transmission */ 1605 #define SERVICE_TRASH (0x40000000) /* RXed PDU was trashed */ 1606 #define SERVICE_CRCERR (0x20000000) /* RXed PDU had CRC error */ 1607 #define SERVICE_CI (0x10000000) /* RXed PDU had CI set */ 1608 #define SERVICE_CLP (0x08000000) /* RXed PDU had CLP set */ 1609 #define SERVICE_STREAM (0x04000000) /* RX Stream mode */ 1610 #define SERVICE_GET_VCI(x) (((x)>>16)&0x3FF) 1611 #define SERVICE_GET_END(x) ((x)&0x1FFF) 1612 1613 /* Handle one thing from the service list - returns true if it marked a 1614 * VCC ready for xmit 1615 */ 1616 static int handle_service(struct lanai_dev *lanai, u32 s) 1617 { 1618 vci_t vci = SERVICE_GET_VCI(s); 1619 struct lanai_vcc *lvcc; 1620 read_lock(&vcc_sklist_lock); 1621 lvcc = lanai->vccs[vci]; 1622 if (unlikely(lvcc == NULL)) { 1623 read_unlock(&vcc_sklist_lock); 1624 DPRINTK("(itf %d) got service entry 0x%X for nonexistent " 1625 "vcc %d\n", lanai->number, (unsigned int) s, vci); 1626 if (s & SERVICE_TX) 1627 lanai->stats.service_notx++; 1628 else 1629 lanai->stats.service_norx++; 1630 return 0; 1631 } 1632 if (s & SERVICE_TX) { /* segmentation interrupt */ 1633 if (unlikely(lvcc->tx.atmvcc == NULL)) { 1634 read_unlock(&vcc_sklist_lock); 1635 DPRINTK("(itf %d) got service entry 0x%X for non-TX " 1636 "vcc %d\n", lanai->number, (unsigned int) s, vci); 1637 lanai->stats.service_notx++; 1638 return 0; 1639 } 1640 __set_bit(vci, lanai->transmit_ready); 1641 lvcc->tx.endptr = SERVICE_GET_END(s); 1642 read_unlock(&vcc_sklist_lock); 1643 return 1; 1644 } 1645 if (unlikely(lvcc->rx.atmvcc == NULL)) { 1646 read_unlock(&vcc_sklist_lock); 1647 DPRINTK("(itf %d) got service entry 0x%X for non-RX " 1648 "vcc %d\n", lanai->number, (unsigned int) s, vci); 1649 lanai->stats.service_norx++; 1650 return 0; 1651 } 1652 if (unlikely(lvcc->rx.atmvcc->qos.aal != ATM_AAL5)) { 1653 read_unlock(&vcc_sklist_lock); 1654 DPRINTK("(itf %d) got RX service entry 0x%X for non-AAL5 " 1655 "vcc %d\n", lanai->number, (unsigned int) s, vci); 1656 lanai->stats.service_rxnotaal5++; 1657 atomic_inc(&lvcc->rx.atmvcc->stats->rx_err); 1658 return 0; 1659 } 1660 if (likely(!(s & (SERVICE_TRASH | SERVICE_STREAM | SERVICE_CRCERR)))) { 1661 vcc_rx_aal5(lvcc, SERVICE_GET_END(s)); 1662 read_unlock(&vcc_sklist_lock); 1663 return 0; 1664 } 1665 if (s & SERVICE_TRASH) { 1666 int bytes; 1667 read_unlock(&vcc_sklist_lock); 1668 DPRINTK("got trashed rx pdu on vci %d\n", vci); 1669 atomic_inc(&lvcc->rx.atmvcc->stats->rx_err); 1670 lvcc->stats.x.aal5.service_trash++; 1671 bytes = (SERVICE_GET_END(s) * 16) - 1672 (((unsigned long) lvcc->rx.buf.ptr) - 1673 ((unsigned long) lvcc->rx.buf.start)) + 47; 1674 if (bytes < 0) 1675 bytes += lanai_buf_size(&lvcc->rx.buf); 1676 lanai->stats.ovfl_trash += (bytes / 48); 1677 return 0; 1678 } 1679 if (s & SERVICE_STREAM) { 1680 read_unlock(&vcc_sklist_lock); 1681 atomic_inc(&lvcc->rx.atmvcc->stats->rx_err); 1682 lvcc->stats.x.aal5.service_stream++; 1683 printk(KERN_ERR DEV_LABEL "(itf %d): Got AAL5 stream " 1684 "PDU on VCI %d!\n", lanai->number, vci); 1685 lanai_reset(lanai); 1686 return 0; 1687 } 1688 DPRINTK("got rx crc error on vci %d\n", vci); 1689 atomic_inc(&lvcc->rx.atmvcc->stats->rx_err); 1690 lvcc->stats.x.aal5.service_rxcrc++; 1691 lvcc->rx.buf.ptr = &lvcc->rx.buf.start[SERVICE_GET_END(s) * 4]; 1692 cardvcc_write(lvcc, SERVICE_GET_END(s), vcc_rxreadptr); 1693 read_unlock(&vcc_sklist_lock); 1694 return 0; 1695 } 1696 1697 /* Try transmitting on all VCIs that we marked ready to serve */ 1698 static void iter_transmit(struct lanai_dev *lanai, vci_t vci) 1699 { 1700 struct lanai_vcc *lvcc = lanai->vccs[vci]; 1701 if (vcc_is_backlogged(lvcc)) 1702 lvcc->tx.unqueue(lanai, lvcc, lvcc->tx.endptr); 1703 } 1704 1705 /* Run service queue -- called from interrupt context or with 1706 * interrupts otherwise disabled and with the lanai->servicelock 1707 * lock held 1708 */ 1709 static void run_service(struct lanai_dev *lanai) 1710 { 1711 int ntx = 0; 1712 u32 wreg = reg_read(lanai, ServWrite_Reg); 1713 const u32 *end = lanai->service.start + wreg; 1714 while (lanai->service.ptr != end) { 1715 ntx += handle_service(lanai, 1716 le32_to_cpup(lanai->service.ptr++)); 1717 if (lanai->service.ptr >= lanai->service.end) 1718 lanai->service.ptr = lanai->service.start; 1719 } 1720 reg_write(lanai, wreg, ServRead_Reg); 1721 if (ntx != 0) { 1722 read_lock(&vcc_sklist_lock); 1723 vci_bitfield_iterate(lanai, lanai->transmit_ready, 1724 iter_transmit); 1725 bitmap_zero(lanai->transmit_ready, NUM_VCI); 1726 read_unlock(&vcc_sklist_lock); 1727 } 1728 } 1729 1730 /* -------------------- GATHER STATISTICS: */ 1731 1732 static void get_statistics(struct lanai_dev *lanai) 1733 { 1734 u32 statreg = reg_read(lanai, Statistics_Reg); 1735 lanai->stats.atm_ovfl += STATS_GET_FIFO_OVFL(statreg); 1736 lanai->stats.hec_err += STATS_GET_HEC_ERR(statreg); 1737 lanai->stats.vci_trash += STATS_GET_BAD_VCI(statreg); 1738 lanai->stats.ovfl_trash += STATS_GET_BUF_OVFL(statreg); 1739 } 1740 1741 /* -------------------- POLLING TIMER: */ 1742 1743 #ifndef DEBUG_RW 1744 /* Try to undequeue 1 backlogged vcc */ 1745 static void iter_dequeue(struct lanai_dev *lanai, vci_t vci) 1746 { 1747 struct lanai_vcc *lvcc = lanai->vccs[vci]; 1748 int endptr; 1749 if (lvcc == NULL || lvcc->tx.atmvcc == NULL || 1750 !vcc_is_backlogged(lvcc)) { 1751 __clear_bit(vci, lanai->backlog_vccs); 1752 return; 1753 } 1754 endptr = TXREADPTR_GET_PTR(cardvcc_read(lvcc, vcc_txreadptr)); 1755 lvcc->tx.unqueue(lanai, lvcc, endptr); 1756 } 1757 #endif /* !DEBUG_RW */ 1758 1759 static void lanai_timed_poll(struct timer_list *t) 1760 { 1761 struct lanai_dev *lanai = from_timer(lanai, t, timer); 1762 #ifndef DEBUG_RW 1763 unsigned long flags; 1764 #ifdef USE_POWERDOWN 1765 if (lanai->conf1 & CONFIG1_POWERDOWN) 1766 return; 1767 #endif /* USE_POWERDOWN */ 1768 local_irq_save(flags); 1769 /* If we can grab the spinlock, check if any services need to be run */ 1770 if (spin_trylock(&lanai->servicelock)) { 1771 run_service(lanai); 1772 spin_unlock(&lanai->servicelock); 1773 } 1774 /* ...and see if any backlogged VCs can make progress */ 1775 /* unfortunately linux has no read_trylock() currently */ 1776 read_lock(&vcc_sklist_lock); 1777 vci_bitfield_iterate(lanai, lanai->backlog_vccs, iter_dequeue); 1778 read_unlock(&vcc_sklist_lock); 1779 local_irq_restore(flags); 1780 1781 get_statistics(lanai); 1782 #endif /* !DEBUG_RW */ 1783 mod_timer(&lanai->timer, jiffies + LANAI_POLL_PERIOD); 1784 } 1785 1786 static inline void lanai_timed_poll_start(struct lanai_dev *lanai) 1787 { 1788 timer_setup(&lanai->timer, lanai_timed_poll, 0); 1789 lanai->timer.expires = jiffies + LANAI_POLL_PERIOD; 1790 add_timer(&lanai->timer); 1791 } 1792 1793 static inline void lanai_timed_poll_stop(struct lanai_dev *lanai) 1794 { 1795 del_timer_sync(&lanai->timer); 1796 } 1797 1798 /* -------------------- INTERRUPT SERVICE: */ 1799 1800 static inline void lanai_int_1(struct lanai_dev *lanai, u32 reason) 1801 { 1802 u32 ack = 0; 1803 if (reason & INT_SERVICE) { 1804 ack = INT_SERVICE; 1805 spin_lock(&lanai->servicelock); 1806 run_service(lanai); 1807 spin_unlock(&lanai->servicelock); 1808 } 1809 if (reason & (INT_AAL0_STR | INT_AAL0)) { 1810 ack |= reason & (INT_AAL0_STR | INT_AAL0); 1811 vcc_rx_aal0(lanai); 1812 } 1813 /* The rest of the interrupts are pretty rare */ 1814 if (ack == reason) 1815 goto done; 1816 if (reason & INT_STATS) { 1817 reason &= ~INT_STATS; /* No need to ack */ 1818 get_statistics(lanai); 1819 } 1820 if (reason & INT_STATUS) { 1821 ack |= reason & INT_STATUS; 1822 lanai_check_status(lanai); 1823 } 1824 if (unlikely(reason & INT_DMASHUT)) { 1825 printk(KERN_ERR DEV_LABEL "(itf %d): driver error - DMA " 1826 "shutdown, reason=0x%08X, address=0x%08X\n", 1827 lanai->number, (unsigned int) (reason & INT_DMASHUT), 1828 (unsigned int) reg_read(lanai, DMA_Addr_Reg)); 1829 if (reason & INT_TABORTBM) { 1830 lanai_reset(lanai); 1831 return; 1832 } 1833 ack |= (reason & INT_DMASHUT); 1834 printk(KERN_ERR DEV_LABEL "(itf %d): re-enabling DMA\n", 1835 lanai->number); 1836 conf1_write(lanai); 1837 lanai->stats.dma_reenable++; 1838 pcistatus_check(lanai, 0); 1839 } 1840 if (unlikely(reason & INT_TABORTSENT)) { 1841 ack |= (reason & INT_TABORTSENT); 1842 printk(KERN_ERR DEV_LABEL "(itf %d): sent PCI target abort\n", 1843 lanai->number); 1844 pcistatus_check(lanai, 0); 1845 } 1846 if (unlikely(reason & INT_SEGSHUT)) { 1847 printk(KERN_ERR DEV_LABEL "(itf %d): driver error - " 1848 "segmentation shutdown, reason=0x%08X\n", lanai->number, 1849 (unsigned int) (reason & INT_SEGSHUT)); 1850 lanai_reset(lanai); 1851 return; 1852 } 1853 if (unlikely(reason & (INT_PING | INT_WAKE))) { 1854 printk(KERN_ERR DEV_LABEL "(itf %d): driver error - " 1855 "unexpected interrupt 0x%08X, resetting\n", 1856 lanai->number, 1857 (unsigned int) (reason & (INT_PING | INT_WAKE))); 1858 lanai_reset(lanai); 1859 return; 1860 } 1861 #ifdef DEBUG 1862 if (unlikely(ack != reason)) { 1863 DPRINTK("unacked ints: 0x%08X\n", 1864 (unsigned int) (reason & ~ack)); 1865 ack = reason; 1866 } 1867 #endif 1868 done: 1869 if (ack != 0) 1870 reg_write(lanai, ack, IntAck_Reg); 1871 } 1872 1873 static irqreturn_t lanai_int(int irq, void *devid) 1874 { 1875 struct lanai_dev *lanai = devid; 1876 u32 reason; 1877 1878 #ifdef USE_POWERDOWN 1879 /* 1880 * If we're powered down we shouldn't be generating any interrupts - 1881 * so assume that this is a shared interrupt line and it's for someone 1882 * else 1883 */ 1884 if (unlikely(lanai->conf1 & CONFIG1_POWERDOWN)) 1885 return IRQ_NONE; 1886 #endif 1887 1888 reason = intr_pending(lanai); 1889 if (reason == 0) 1890 return IRQ_NONE; /* Must be for someone else */ 1891 1892 do { 1893 if (unlikely(reason == 0xFFFFFFFF)) 1894 break; /* Maybe we've been unplugged? */ 1895 lanai_int_1(lanai, reason); 1896 reason = intr_pending(lanai); 1897 } while (reason != 0); 1898 1899 return IRQ_HANDLED; 1900 } 1901 1902 /* TODO - it would be nice if we could use the "delayed interrupt" system 1903 * to some advantage 1904 */ 1905 1906 /* -------------------- CHECK BOARD ID/REV: */ 1907 1908 /* 1909 * The board id and revision are stored both in the reset register and 1910 * in the PCI configuration space - the documentation says to check 1911 * each of them. If revp!=NULL we store the revision there 1912 */ 1913 static int check_board_id_and_rev(const char *name, u32 val, int *revp) 1914 { 1915 DPRINTK("%s says board_id=%d, board_rev=%d\n", name, 1916 (int) RESET_GET_BOARD_ID(val), 1917 (int) RESET_GET_BOARD_REV(val)); 1918 if (RESET_GET_BOARD_ID(val) != BOARD_ID_LANAI256) { 1919 printk(KERN_ERR DEV_LABEL ": Found %s board-id %d -- not a " 1920 "Lanai 25.6\n", name, (int) RESET_GET_BOARD_ID(val)); 1921 return -ENODEV; 1922 } 1923 if (revp != NULL) 1924 *revp = RESET_GET_BOARD_REV(val); 1925 return 0; 1926 } 1927 1928 /* -------------------- PCI INITIALIZATION/SHUTDOWN: */ 1929 1930 static int lanai_pci_start(struct lanai_dev *lanai) 1931 { 1932 struct pci_dev *pci = lanai->pci; 1933 int result; 1934 1935 if (pci_enable_device(pci) != 0) { 1936 printk(KERN_ERR DEV_LABEL "(itf %d): can't enable " 1937 "PCI device", lanai->number); 1938 return -ENXIO; 1939 } 1940 pci_set_master(pci); 1941 if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32)) != 0) { 1942 printk(KERN_WARNING DEV_LABEL 1943 "(itf %d): No suitable DMA available.\n", lanai->number); 1944 return -EBUSY; 1945 } 1946 result = check_board_id_and_rev("PCI", pci->subsystem_device, NULL); 1947 if (result != 0) 1948 return result; 1949 /* Set latency timer to zero as per lanai docs */ 1950 result = pci_write_config_byte(pci, PCI_LATENCY_TIMER, 0); 1951 if (result != PCIBIOS_SUCCESSFUL) { 1952 printk(KERN_ERR DEV_LABEL "(itf %d): can't write " 1953 "PCI_LATENCY_TIMER: %d\n", lanai->number, result); 1954 return -EINVAL; 1955 } 1956 pcistatus_check(lanai, 1); 1957 pcistatus_check(lanai, 0); 1958 return 0; 1959 } 1960 1961 /* -------------------- VPI/VCI ALLOCATION: */ 1962 1963 /* 1964 * We _can_ use VCI==0 for normal traffic, but only for UBR (or we'll 1965 * get a CBRZERO interrupt), and we can use it only if no one is receiving 1966 * AAL0 traffic (since they will use the same queue) - according to the 1967 * docs we shouldn't even use it for AAL0 traffic 1968 */ 1969 static inline int vci0_is_ok(struct lanai_dev *lanai, 1970 const struct atm_qos *qos) 1971 { 1972 if (qos->txtp.traffic_class == ATM_CBR || qos->aal == ATM_AAL0) 1973 return 0; 1974 if (qos->rxtp.traffic_class != ATM_NONE) { 1975 if (lanai->naal0 != 0) 1976 return 0; 1977 lanai->conf2 |= CONFIG2_VCI0_NORMAL; 1978 conf2_write_if_powerup(lanai); 1979 } 1980 return 1; 1981 } 1982 1983 /* return true if vci is currently unused, or if requested qos is 1984 * compatible 1985 */ 1986 static int vci_is_ok(struct lanai_dev *lanai, vci_t vci, 1987 const struct atm_vcc *atmvcc) 1988 { 1989 const struct atm_qos *qos = &atmvcc->qos; 1990 const struct lanai_vcc *lvcc = lanai->vccs[vci]; 1991 if (vci == 0 && !vci0_is_ok(lanai, qos)) 1992 return 0; 1993 if (unlikely(lvcc != NULL)) { 1994 if (qos->rxtp.traffic_class != ATM_NONE && 1995 lvcc->rx.atmvcc != NULL && lvcc->rx.atmvcc != atmvcc) 1996 return 0; 1997 if (qos->txtp.traffic_class != ATM_NONE && 1998 lvcc->tx.atmvcc != NULL && lvcc->tx.atmvcc != atmvcc) 1999 return 0; 2000 if (qos->txtp.traffic_class == ATM_CBR && 2001 lanai->cbrvcc != NULL && lanai->cbrvcc != atmvcc) 2002 return 0; 2003 } 2004 if (qos->aal == ATM_AAL0 && lanai->naal0 == 0 && 2005 qos->rxtp.traffic_class != ATM_NONE) { 2006 const struct lanai_vcc *vci0 = lanai->vccs[0]; 2007 if (vci0 != NULL && vci0->rx.atmvcc != NULL) 2008 return 0; 2009 lanai->conf2 &= ~CONFIG2_VCI0_NORMAL; 2010 conf2_write_if_powerup(lanai); 2011 } 2012 return 1; 2013 } 2014 2015 static int lanai_normalize_ci(struct lanai_dev *lanai, 2016 const struct atm_vcc *atmvcc, short *vpip, vci_t *vcip) 2017 { 2018 switch (*vpip) { 2019 case ATM_VPI_ANY: 2020 *vpip = 0; 2021 fallthrough; 2022 case 0: 2023 break; 2024 default: 2025 return -EADDRINUSE; 2026 } 2027 switch (*vcip) { 2028 case ATM_VCI_ANY: 2029 for (*vcip = ATM_NOT_RSV_VCI; *vcip < lanai->num_vci; 2030 (*vcip)++) 2031 if (vci_is_ok(lanai, *vcip, atmvcc)) 2032 return 0; 2033 return -EADDRINUSE; 2034 default: 2035 if (*vcip >= lanai->num_vci || *vcip < 0 || 2036 !vci_is_ok(lanai, *vcip, atmvcc)) 2037 return -EADDRINUSE; 2038 } 2039 return 0; 2040 } 2041 2042 /* -------------------- MANAGE CBR: */ 2043 2044 /* 2045 * CBR ICG is stored as a fixed-point number with 4 fractional bits. 2046 * Note that storing a number greater than 2046.0 will result in 2047 * incorrect shaping 2048 */ 2049 #define CBRICG_FRAC_BITS (4) 2050 #define CBRICG_MAX (2046 << CBRICG_FRAC_BITS) 2051 2052 /* 2053 * ICG is related to PCR with the formula PCR = MAXPCR / (ICG + 1) 2054 * where MAXPCR is (according to the docs) 25600000/(54*8), 2055 * which is equal to (3125<<9)/27. 2056 * 2057 * Solving for ICG, we get: 2058 * ICG = MAXPCR/PCR - 1 2059 * ICG = (3125<<9)/(27*PCR) - 1 2060 * ICG = ((3125<<9) - (27*PCR)) / (27*PCR) 2061 * 2062 * The end result is supposed to be a fixed-point number with FRAC_BITS 2063 * bits of a fractional part, so we keep everything in the numerator 2064 * shifted by that much as we compute 2065 * 2066 */ 2067 static int pcr_to_cbricg(const struct atm_qos *qos) 2068 { 2069 int rounddown = 0; /* 1 = Round PCR down, i.e. round ICG _up_ */ 2070 int x, icg, pcr = atm_pcr_goal(&qos->txtp); 2071 if (pcr == 0) /* Use maximum bandwidth */ 2072 return 0; 2073 if (pcr < 0) { 2074 rounddown = 1; 2075 pcr = -pcr; 2076 } 2077 x = pcr * 27; 2078 icg = (3125 << (9 + CBRICG_FRAC_BITS)) - (x << CBRICG_FRAC_BITS); 2079 if (rounddown) 2080 icg += x - 1; 2081 icg /= x; 2082 if (icg > CBRICG_MAX) 2083 icg = CBRICG_MAX; 2084 DPRINTK("pcr_to_cbricg: pcr=%d rounddown=%c icg=%d\n", 2085 pcr, rounddown ? 'Y' : 'N', icg); 2086 return icg; 2087 } 2088 2089 static inline void lanai_cbr_setup(struct lanai_dev *lanai) 2090 { 2091 reg_write(lanai, pcr_to_cbricg(&lanai->cbrvcc->qos), CBR_ICG_Reg); 2092 reg_write(lanai, lanai->cbrvcc->vci, CBR_PTR_Reg); 2093 lanai->conf2 |= CONFIG2_CBR_ENABLE; 2094 conf2_write(lanai); 2095 } 2096 2097 static inline void lanai_cbr_shutdown(struct lanai_dev *lanai) 2098 { 2099 lanai->conf2 &= ~CONFIG2_CBR_ENABLE; 2100 conf2_write(lanai); 2101 } 2102 2103 /* -------------------- OPERATIONS: */ 2104 2105 /* setup a newly detected device */ 2106 static int lanai_dev_open(struct atm_dev *atmdev) 2107 { 2108 struct lanai_dev *lanai = (struct lanai_dev *) atmdev->dev_data; 2109 unsigned long raw_base; 2110 int result; 2111 2112 DPRINTK("In lanai_dev_open()\n"); 2113 /* Basic device fields */ 2114 lanai->number = atmdev->number; 2115 lanai->num_vci = NUM_VCI; 2116 bitmap_zero(lanai->backlog_vccs, NUM_VCI); 2117 bitmap_zero(lanai->transmit_ready, NUM_VCI); 2118 lanai->naal0 = 0; 2119 #ifdef USE_POWERDOWN 2120 lanai->nbound = 0; 2121 #endif 2122 lanai->cbrvcc = NULL; 2123 memset(&lanai->stats, 0, sizeof lanai->stats); 2124 spin_lock_init(&lanai->endtxlock); 2125 spin_lock_init(&lanai->servicelock); 2126 atmdev->ci_range.vpi_bits = 0; 2127 atmdev->ci_range.vci_bits = 0; 2128 while (1 << atmdev->ci_range.vci_bits < lanai->num_vci) 2129 atmdev->ci_range.vci_bits++; 2130 atmdev->link_rate = ATM_25_PCR; 2131 2132 /* 3.2: PCI initialization */ 2133 if ((result = lanai_pci_start(lanai)) != 0) 2134 goto error; 2135 raw_base = lanai->pci->resource[0].start; 2136 lanai->base = (bus_addr_t) ioremap(raw_base, LANAI_MAPPING_SIZE); 2137 if (lanai->base == NULL) { 2138 printk(KERN_ERR DEV_LABEL ": couldn't remap I/O space\n"); 2139 result = -ENOMEM; 2140 goto error_pci; 2141 } 2142 /* 3.3: Reset lanai and PHY */ 2143 reset_board(lanai); 2144 lanai->conf1 = reg_read(lanai, Config1_Reg); 2145 lanai->conf1 &= ~(CONFIG1_GPOUT1 | CONFIG1_POWERDOWN | 2146 CONFIG1_MASK_LEDMODE); 2147 lanai->conf1 |= CONFIG1_SET_LEDMODE(LEDMODE_NOT_SOOL); 2148 reg_write(lanai, lanai->conf1 | CONFIG1_GPOUT1, Config1_Reg); 2149 udelay(1000); 2150 conf1_write(lanai); 2151 2152 /* 2153 * 3.4: Turn on endian mode for big-endian hardware 2154 * We don't actually want to do this - the actual bit fields 2155 * in the endian register are not documented anywhere. 2156 * Instead we do the bit-flipping ourselves on big-endian 2157 * hardware. 2158 * 2159 * 3.5: get the board ID/rev by reading the reset register 2160 */ 2161 result = check_board_id_and_rev("register", 2162 reg_read(lanai, Reset_Reg), &lanai->board_rev); 2163 if (result != 0) 2164 goto error_unmap; 2165 2166 /* 3.6: read EEPROM */ 2167 if ((result = eeprom_read(lanai)) != 0) 2168 goto error_unmap; 2169 if ((result = eeprom_validate(lanai)) != 0) 2170 goto error_unmap; 2171 2172 /* 3.7: re-reset PHY, do loopback tests, setup PHY */ 2173 reg_write(lanai, lanai->conf1 | CONFIG1_GPOUT1, Config1_Reg); 2174 udelay(1000); 2175 conf1_write(lanai); 2176 /* TODO - loopback tests */ 2177 lanai->conf1 |= (CONFIG1_GPOUT2 | CONFIG1_GPOUT3 | CONFIG1_DMA_ENABLE); 2178 conf1_write(lanai); 2179 2180 /* 3.8/3.9: test and initialize card SRAM */ 2181 if ((result = sram_test_and_clear(lanai)) != 0) 2182 goto error_unmap; 2183 2184 /* 3.10: initialize lanai registers */ 2185 lanai->conf1 |= CONFIG1_DMA_ENABLE; 2186 conf1_write(lanai); 2187 if ((result = service_buffer_allocate(lanai)) != 0) 2188 goto error_unmap; 2189 if ((result = vcc_table_allocate(lanai)) != 0) 2190 goto error_service; 2191 lanai->conf2 = (lanai->num_vci >= 512 ? CONFIG2_HOWMANY : 0) | 2192 CONFIG2_HEC_DROP | /* ??? */ CONFIG2_PTI7_MODE; 2193 conf2_write(lanai); 2194 reg_write(lanai, TX_FIFO_DEPTH, TxDepth_Reg); 2195 reg_write(lanai, 0, CBR_ICG_Reg); /* CBR defaults to no limit */ 2196 if ((result = request_irq(lanai->pci->irq, lanai_int, IRQF_SHARED, 2197 DEV_LABEL, lanai)) != 0) { 2198 printk(KERN_ERR DEV_LABEL ": can't allocate interrupt\n"); 2199 goto error_vcctable; 2200 } 2201 mb(); /* Make sure that all that made it */ 2202 intr_enable(lanai, INT_ALL & ~(INT_PING | INT_WAKE)); 2203 /* 3.11: initialize loop mode (i.e. turn looping off) */ 2204 lanai->conf1 = (lanai->conf1 & ~CONFIG1_MASK_LOOPMODE) | 2205 CONFIG1_SET_LOOPMODE(LOOPMODE_NORMAL) | 2206 CONFIG1_GPOUT2 | CONFIG1_GPOUT3; 2207 conf1_write(lanai); 2208 lanai->status = reg_read(lanai, Status_Reg); 2209 /* We're now done initializing this card */ 2210 #ifdef USE_POWERDOWN 2211 lanai->conf1 |= CONFIG1_POWERDOWN; 2212 conf1_write(lanai); 2213 #endif 2214 memcpy(atmdev->esi, eeprom_mac(lanai), ESI_LEN); 2215 lanai_timed_poll_start(lanai); 2216 printk(KERN_NOTICE DEV_LABEL "(itf %d): rev.%d, base=%p, irq=%u " 2217 "(%pMF)\n", lanai->number, (int) lanai->pci->revision, 2218 lanai->base, lanai->pci->irq, atmdev->esi); 2219 printk(KERN_NOTICE DEV_LABEL "(itf %d): LANAI%s, serialno=%u(0x%X), " 2220 "board_rev=%d\n", lanai->number, 2221 lanai->type==lanai2 ? "2" : "HB", (unsigned int) lanai->serialno, 2222 (unsigned int) lanai->serialno, lanai->board_rev); 2223 return 0; 2224 2225 error_vcctable: 2226 vcc_table_deallocate(lanai); 2227 error_service: 2228 service_buffer_deallocate(lanai); 2229 error_unmap: 2230 reset_board(lanai); 2231 #ifdef USE_POWERDOWN 2232 lanai->conf1 = reg_read(lanai, Config1_Reg) | CONFIG1_POWERDOWN; 2233 conf1_write(lanai); 2234 #endif 2235 iounmap(lanai->base); 2236 lanai->base = NULL; 2237 error_pci: 2238 pci_disable_device(lanai->pci); 2239 error: 2240 return result; 2241 } 2242 2243 /* called when device is being shutdown, and all vcc's are gone - higher 2244 * levels will deallocate the atm device for us 2245 */ 2246 static void lanai_dev_close(struct atm_dev *atmdev) 2247 { 2248 struct lanai_dev *lanai = (struct lanai_dev *) atmdev->dev_data; 2249 if (lanai->base==NULL) 2250 return; 2251 printk(KERN_INFO DEV_LABEL "(itf %d): shutting down interface\n", 2252 lanai->number); 2253 lanai_timed_poll_stop(lanai); 2254 #ifdef USE_POWERDOWN 2255 lanai->conf1 = reg_read(lanai, Config1_Reg) & ~CONFIG1_POWERDOWN; 2256 conf1_write(lanai); 2257 #endif 2258 intr_disable(lanai, INT_ALL); 2259 free_irq(lanai->pci->irq, lanai); 2260 reset_board(lanai); 2261 #ifdef USE_POWERDOWN 2262 lanai->conf1 |= CONFIG1_POWERDOWN; 2263 conf1_write(lanai); 2264 #endif 2265 pci_disable_device(lanai->pci); 2266 vcc_table_deallocate(lanai); 2267 service_buffer_deallocate(lanai); 2268 iounmap(lanai->base); 2269 kfree(lanai); 2270 } 2271 2272 /* close a vcc */ 2273 static void lanai_close(struct atm_vcc *atmvcc) 2274 { 2275 struct lanai_vcc *lvcc = (struct lanai_vcc *) atmvcc->dev_data; 2276 struct lanai_dev *lanai = (struct lanai_dev *) atmvcc->dev->dev_data; 2277 if (lvcc == NULL) 2278 return; 2279 clear_bit(ATM_VF_READY, &atmvcc->flags); 2280 clear_bit(ATM_VF_PARTIAL, &atmvcc->flags); 2281 if (lvcc->rx.atmvcc == atmvcc) { 2282 lanai_shutdown_rx_vci(lvcc); 2283 if (atmvcc->qos.aal == ATM_AAL0) { 2284 if (--lanai->naal0 <= 0) 2285 aal0_buffer_free(lanai); 2286 } else 2287 lanai_buf_deallocate(&lvcc->rx.buf, lanai->pci); 2288 lvcc->rx.atmvcc = NULL; 2289 } 2290 if (lvcc->tx.atmvcc == atmvcc) { 2291 if (atmvcc == lanai->cbrvcc) { 2292 if (lvcc->vbase != NULL) 2293 lanai_cbr_shutdown(lanai); 2294 lanai->cbrvcc = NULL; 2295 } 2296 lanai_shutdown_tx_vci(lanai, lvcc); 2297 lanai_buf_deallocate(&lvcc->tx.buf, lanai->pci); 2298 lvcc->tx.atmvcc = NULL; 2299 } 2300 if (--lvcc->nref == 0) { 2301 host_vcc_unbind(lanai, lvcc); 2302 kfree(lvcc); 2303 } 2304 atmvcc->dev_data = NULL; 2305 clear_bit(ATM_VF_ADDR, &atmvcc->flags); 2306 } 2307 2308 /* open a vcc on the card to vpi/vci */ 2309 static int lanai_open(struct atm_vcc *atmvcc) 2310 { 2311 struct lanai_dev *lanai; 2312 struct lanai_vcc *lvcc; 2313 int result = 0; 2314 int vci = atmvcc->vci; 2315 short vpi = atmvcc->vpi; 2316 /* we don't support partial open - it's not really useful anyway */ 2317 if ((test_bit(ATM_VF_PARTIAL, &atmvcc->flags)) || 2318 (vpi == ATM_VPI_UNSPEC) || (vci == ATM_VCI_UNSPEC)) 2319 return -EINVAL; 2320 lanai = (struct lanai_dev *) atmvcc->dev->dev_data; 2321 result = lanai_normalize_ci(lanai, atmvcc, &vpi, &vci); 2322 if (unlikely(result != 0)) 2323 goto out; 2324 set_bit(ATM_VF_ADDR, &atmvcc->flags); 2325 if (atmvcc->qos.aal != ATM_AAL0 && atmvcc->qos.aal != ATM_AAL5) 2326 return -EINVAL; 2327 DPRINTK(DEV_LABEL "(itf %d): open %d.%d\n", lanai->number, 2328 (int) vpi, vci); 2329 lvcc = lanai->vccs[vci]; 2330 if (lvcc == NULL) { 2331 lvcc = new_lanai_vcc(); 2332 if (unlikely(lvcc == NULL)) 2333 return -ENOMEM; 2334 atmvcc->dev_data = lvcc; 2335 } 2336 lvcc->nref++; 2337 if (atmvcc->qos.rxtp.traffic_class != ATM_NONE) { 2338 APRINTK(lvcc->rx.atmvcc == NULL, "rx.atmvcc!=NULL, vci=%d\n", 2339 vci); 2340 if (atmvcc->qos.aal == ATM_AAL0) { 2341 if (lanai->naal0 == 0) 2342 result = aal0_buffer_allocate(lanai); 2343 } else 2344 result = lanai_setup_rx_vci_aal5( 2345 lanai, lvcc, &atmvcc->qos); 2346 if (unlikely(result != 0)) 2347 goto out_free; 2348 lvcc->rx.atmvcc = atmvcc; 2349 lvcc->stats.rx_nomem = 0; 2350 lvcc->stats.x.aal5.rx_badlen = 0; 2351 lvcc->stats.x.aal5.service_trash = 0; 2352 lvcc->stats.x.aal5.service_stream = 0; 2353 lvcc->stats.x.aal5.service_rxcrc = 0; 2354 if (atmvcc->qos.aal == ATM_AAL0) 2355 lanai->naal0++; 2356 } 2357 if (atmvcc->qos.txtp.traffic_class != ATM_NONE) { 2358 APRINTK(lvcc->tx.atmvcc == NULL, "tx.atmvcc!=NULL, vci=%d\n", 2359 vci); 2360 result = lanai_setup_tx_vci(lanai, lvcc, &atmvcc->qos); 2361 if (unlikely(result != 0)) 2362 goto out_free; 2363 lvcc->tx.atmvcc = atmvcc; 2364 if (atmvcc->qos.txtp.traffic_class == ATM_CBR) { 2365 APRINTK(lanai->cbrvcc == NULL, 2366 "cbrvcc!=NULL, vci=%d\n", vci); 2367 lanai->cbrvcc = atmvcc; 2368 } 2369 } 2370 host_vcc_bind(lanai, lvcc, vci); 2371 /* 2372 * Make sure everything made it to RAM before we tell the card about 2373 * the VCC 2374 */ 2375 wmb(); 2376 if (atmvcc == lvcc->rx.atmvcc) 2377 host_vcc_start_rx(lvcc); 2378 if (atmvcc == lvcc->tx.atmvcc) { 2379 host_vcc_start_tx(lvcc); 2380 if (lanai->cbrvcc == atmvcc) 2381 lanai_cbr_setup(lanai); 2382 } 2383 set_bit(ATM_VF_READY, &atmvcc->flags); 2384 return 0; 2385 out_free: 2386 lanai_close(atmvcc); 2387 out: 2388 return result; 2389 } 2390 2391 static int lanai_send(struct atm_vcc *atmvcc, struct sk_buff *skb) 2392 { 2393 struct lanai_vcc *lvcc = (struct lanai_vcc *) atmvcc->dev_data; 2394 struct lanai_dev *lanai = (struct lanai_dev *) atmvcc->dev->dev_data; 2395 unsigned long flags; 2396 if (unlikely(lvcc == NULL || lvcc->vbase == NULL || 2397 lvcc->tx.atmvcc != atmvcc)) 2398 goto einval; 2399 #ifdef DEBUG 2400 if (unlikely(skb == NULL)) { 2401 DPRINTK("lanai_send: skb==NULL for vci=%d\n", atmvcc->vci); 2402 goto einval; 2403 } 2404 if (unlikely(lanai == NULL)) { 2405 DPRINTK("lanai_send: lanai==NULL for vci=%d\n", atmvcc->vci); 2406 goto einval; 2407 } 2408 #endif 2409 ATM_SKB(skb)->vcc = atmvcc; 2410 switch (atmvcc->qos.aal) { 2411 case ATM_AAL5: 2412 read_lock_irqsave(&vcc_sklist_lock, flags); 2413 vcc_tx_aal5(lanai, lvcc, skb); 2414 read_unlock_irqrestore(&vcc_sklist_lock, flags); 2415 return 0; 2416 case ATM_AAL0: 2417 if (unlikely(skb->len != ATM_CELL_SIZE-1)) 2418 goto einval; 2419 /* NOTE - this next line is technically invalid - we haven't unshared skb */ 2420 cpu_to_be32s((u32 *) skb->data); 2421 read_lock_irqsave(&vcc_sklist_lock, flags); 2422 vcc_tx_aal0(lanai, lvcc, skb); 2423 read_unlock_irqrestore(&vcc_sklist_lock, flags); 2424 return 0; 2425 } 2426 DPRINTK("lanai_send: bad aal=%d on vci=%d\n", (int) atmvcc->qos.aal, 2427 atmvcc->vci); 2428 einval: 2429 lanai_free_skb(atmvcc, skb); 2430 return -EINVAL; 2431 } 2432 2433 static int lanai_change_qos(struct atm_vcc *atmvcc, 2434 /*const*/ struct atm_qos *qos, int flags) 2435 { 2436 return -EBUSY; /* TODO: need to write this */ 2437 } 2438 2439 #ifndef CONFIG_PROC_FS 2440 #define lanai_proc_read NULL 2441 #else 2442 static int lanai_proc_read(struct atm_dev *atmdev, loff_t *pos, char *page) 2443 { 2444 struct lanai_dev *lanai = (struct lanai_dev *) atmdev->dev_data; 2445 loff_t left = *pos; 2446 struct lanai_vcc *lvcc; 2447 if (left-- == 0) 2448 return sprintf(page, DEV_LABEL "(itf %d): chip=LANAI%s, " 2449 "serial=%u, magic=0x%08X, num_vci=%d\n", 2450 atmdev->number, lanai->type==lanai2 ? "2" : "HB", 2451 (unsigned int) lanai->serialno, 2452 (unsigned int) lanai->magicno, lanai->num_vci); 2453 if (left-- == 0) 2454 return sprintf(page, "revision: board=%d, pci_if=%d\n", 2455 lanai->board_rev, (int) lanai->pci->revision); 2456 if (left-- == 0) 2457 return sprintf(page, "EEPROM ESI: %pM\n", 2458 &lanai->eeprom[EEPROM_MAC]); 2459 if (left-- == 0) 2460 return sprintf(page, "status: SOOL=%d, LOCD=%d, LED=%d, " 2461 "GPIN=%d\n", (lanai->status & STATUS_SOOL) ? 1 : 0, 2462 (lanai->status & STATUS_LOCD) ? 1 : 0, 2463 (lanai->status & STATUS_LED) ? 1 : 0, 2464 (lanai->status & STATUS_GPIN) ? 1 : 0); 2465 if (left-- == 0) 2466 return sprintf(page, "global buffer sizes: service=%zu, " 2467 "aal0_rx=%zu\n", lanai_buf_size(&lanai->service), 2468 lanai->naal0 ? lanai_buf_size(&lanai->aal0buf) : 0); 2469 if (left-- == 0) { 2470 get_statistics(lanai); 2471 return sprintf(page, "cells in error: overflow=%u, " 2472 "closed_vci=%u, bad_HEC=%u, rx_fifo=%u\n", 2473 lanai->stats.ovfl_trash, lanai->stats.vci_trash, 2474 lanai->stats.hec_err, lanai->stats.atm_ovfl); 2475 } 2476 if (left-- == 0) 2477 return sprintf(page, "PCI errors: parity_detect=%u, " 2478 "master_abort=%u, master_target_abort=%u,\n", 2479 lanai->stats.pcierr_parity_detect, 2480 lanai->stats.pcierr_serr_set, 2481 lanai->stats.pcierr_m_target_abort); 2482 if (left-- == 0) 2483 return sprintf(page, " slave_target_abort=%u, " 2484 "master_parity=%u\n", lanai->stats.pcierr_s_target_abort, 2485 lanai->stats.pcierr_master_parity); 2486 if (left-- == 0) 2487 return sprintf(page, " no_tx=%u, " 2488 "no_rx=%u, bad_rx_aal=%u\n", lanai->stats.service_norx, 2489 lanai->stats.service_notx, 2490 lanai->stats.service_rxnotaal5); 2491 if (left-- == 0) 2492 return sprintf(page, "resets: dma=%u, card=%u\n", 2493 lanai->stats.dma_reenable, lanai->stats.card_reset); 2494 /* At this point, "left" should be the VCI we're looking for */ 2495 read_lock(&vcc_sklist_lock); 2496 for (; ; left++) { 2497 if (left >= NUM_VCI) { 2498 left = 0; 2499 goto out; 2500 } 2501 if ((lvcc = lanai->vccs[left]) != NULL) 2502 break; 2503 (*pos)++; 2504 } 2505 /* Note that we re-use "left" here since we're done with it */ 2506 left = sprintf(page, "VCI %4d: nref=%d, rx_nomem=%u", (vci_t) left, 2507 lvcc->nref, lvcc->stats.rx_nomem); 2508 if (lvcc->rx.atmvcc != NULL) { 2509 left += sprintf(&page[left], ",\n rx_AAL=%d", 2510 lvcc->rx.atmvcc->qos.aal == ATM_AAL5 ? 5 : 0); 2511 if (lvcc->rx.atmvcc->qos.aal == ATM_AAL5) 2512 left += sprintf(&page[left], ", rx_buf_size=%zu, " 2513 "rx_bad_len=%u,\n rx_service_trash=%u, " 2514 "rx_service_stream=%u, rx_bad_crc=%u", 2515 lanai_buf_size(&lvcc->rx.buf), 2516 lvcc->stats.x.aal5.rx_badlen, 2517 lvcc->stats.x.aal5.service_trash, 2518 lvcc->stats.x.aal5.service_stream, 2519 lvcc->stats.x.aal5.service_rxcrc); 2520 } 2521 if (lvcc->tx.atmvcc != NULL) 2522 left += sprintf(&page[left], ",\n tx_AAL=%d, " 2523 "tx_buf_size=%zu, tx_qos=%cBR, tx_backlogged=%c", 2524 lvcc->tx.atmvcc->qos.aal == ATM_AAL5 ? 5 : 0, 2525 lanai_buf_size(&lvcc->tx.buf), 2526 lvcc->tx.atmvcc == lanai->cbrvcc ? 'C' : 'U', 2527 vcc_is_backlogged(lvcc) ? 'Y' : 'N'); 2528 page[left++] = '\n'; 2529 page[left] = '\0'; 2530 out: 2531 read_unlock(&vcc_sklist_lock); 2532 return left; 2533 } 2534 #endif /* CONFIG_PROC_FS */ 2535 2536 /* -------------------- HOOKS: */ 2537 2538 static const struct atmdev_ops ops = { 2539 .dev_close = lanai_dev_close, 2540 .open = lanai_open, 2541 .close = lanai_close, 2542 .send = lanai_send, 2543 .phy_put = NULL, 2544 .phy_get = NULL, 2545 .change_qos = lanai_change_qos, 2546 .proc_read = lanai_proc_read, 2547 .owner = THIS_MODULE 2548 }; 2549 2550 /* initialize one probed card */ 2551 static int lanai_init_one(struct pci_dev *pci, 2552 const struct pci_device_id *ident) 2553 { 2554 struct lanai_dev *lanai; 2555 struct atm_dev *atmdev; 2556 int result; 2557 2558 lanai = kzalloc(sizeof(*lanai), GFP_KERNEL); 2559 if (lanai == NULL) { 2560 printk(KERN_ERR DEV_LABEL 2561 ": couldn't allocate dev_data structure!\n"); 2562 return -ENOMEM; 2563 } 2564 2565 atmdev = atm_dev_register(DEV_LABEL, &pci->dev, &ops, -1, NULL); 2566 if (atmdev == NULL) { 2567 printk(KERN_ERR DEV_LABEL 2568 ": couldn't register atm device!\n"); 2569 kfree(lanai); 2570 return -EBUSY; 2571 } 2572 2573 atmdev->dev_data = lanai; 2574 lanai->pci = pci; 2575 lanai->type = (enum lanai_type) ident->device; 2576 2577 result = lanai_dev_open(atmdev); 2578 if (result != 0) { 2579 DPRINTK("lanai_start() failed, err=%d\n", -result); 2580 atm_dev_deregister(atmdev); 2581 kfree(lanai); 2582 } 2583 return result; 2584 } 2585 2586 static const struct pci_device_id lanai_pci_tbl[] = { 2587 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_LANAI2) }, 2588 { PCI_VDEVICE(EF, PCI_DEVICE_ID_EF_ATM_LANAIHB) }, 2589 { 0, } /* terminal entry */ 2590 }; 2591 MODULE_DEVICE_TABLE(pci, lanai_pci_tbl); 2592 2593 static struct pci_driver lanai_driver = { 2594 .name = DEV_LABEL, 2595 .id_table = lanai_pci_tbl, 2596 .probe = lanai_init_one, 2597 }; 2598 2599 module_pci_driver(lanai_driver); 2600 2601 MODULE_AUTHOR("Mitchell Blank Jr <mitch@sfgoth.com>"); 2602 MODULE_DESCRIPTION("Efficient Networks Speedstream 3010 driver"); 2603 MODULE_LICENSE("GPL"); 2604