1
   2/* drivers/atm/firestream.c - FireStream 155 (MB86697) and
   3 *                            FireStream  50 (MB86695) device driver 
   4 */
   5 
   6/* Written & (C) 2000 by R.E.Wolff@BitWizard.nl 
   7 * Copied snippets from zatm.c by Werner Almesberger, EPFL LRC/ICA 
   8 * and ambassador.c Copyright (C) 1995-1999  Madge Networks Ltd 
   9 */
  10
  11/*
  12  This program is free software; you can redistribute it and/or modify
  13  it under the terms of the GNU General Public License as published by
  14  the Free Software Foundation; either version 2 of the License, or
  15  (at your option) any later version.
  16
  17  This program is distributed in the hope that it will be useful,
  18  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  GNU General Public License for more details.
  21
  22  You should have received a copy of the GNU General Public License
  23  along with this program; if not, write to the Free Software
  24  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25
  26  The GNU GPL is contained in /usr/doc/copyright/GPL on a Debian
  27  system and in the file COPYING in the Linux kernel source.
  28*/
  29
  30
  31#include <linux/module.h>
  32#include <linux/sched.h>
  33#include <linux/kernel.h>
  34#include <linux/mm.h>
  35#include <linux/pci.h>
  36#include <linux/poison.h>
  37#include <linux/errno.h>
  38#include <linux/atm.h>
  39#include <linux/atmdev.h>
  40#include <linux/sonet.h>
  41#include <linux/skbuff.h>
  42#include <linux/netdevice.h>
  43#include <linux/delay.h>
  44#include <linux/ioport.h> /* for request_region */
  45#include <linux/uio.h>
  46#include <linux/init.h>
  47#include <linux/interrupt.h>
  48#include <linux/capability.h>
  49#include <linux/bitops.h>
  50#include <linux/slab.h>
  51#include <asm/byteorder.h>
  52#include <asm/system.h>
  53#include <asm/string.h>
  54#include <asm/io.h>
  55#include <linux/atomic.h>
  56#include <asm/uaccess.h>
  57#include <linux/wait.h>
  58
  59#include "firestream.h"
  60
  61static int loopback = 0;
  62static int num=0x5a;
  63
  64/* According to measurements (but they look suspicious to me!) done in
  65 * '97, 37% of the packets are one cell in size. So it pays to have
  66 * buffers allocated at that size. A large jump in percentage of
  67 * packets occurs at packets around 536 bytes in length. So it also
  68 * pays to have those pre-allocated. Unfortunately, we can't fully
  69 * take advantage of this as the majority of the packets is likely to
  70 * be TCP/IP (As where obviously the measurement comes from) There the
  71 * link would be opened with say a 1500 byte MTU, and we can't handle
  72 * smaller buffers more efficiently than the larger ones. -- REW
  73 */
  74
  75/* Due to the way Linux memory management works, specifying "576" as
  76 * an allocation size here isn't going to help. They are allocated
  77 * from 1024-byte regions anyway. With the size of the sk_buffs (quite
  78 * large), it doesn't pay to allocate the smallest size (64) -- REW */
  79
  80/* This is all guesswork. Hard numbers to back this up or disprove this, 
  81 * are appreciated. -- REW */
  82
  83/* The last entry should be about 64k. However, the "buffer size" is
  84 * passed to the chip in a 16 bit field. I don't know how "65536"
  85 * would be interpreted. -- REW */
  86
  87#define NP FS_NR_FREE_POOLS
  88static int rx_buf_sizes[NP]  = {128,  256,  512, 1024, 2048, 4096, 16384, 65520};
  89/* log2:                 7     8     9    10    11    12    14     16 */
  90
  91#if 0
  92static int rx_pool_sizes[NP] = {1024, 1024, 512, 256,  128,  64,   32,    32};
  93#else
  94/* debug */
  95static int rx_pool_sizes[NP] = {128,  128,  128, 64,   64,   64,   32,    32};
  96#endif
  97/* log2:                 10    10    9    8     7     6     5      5  */
  98/* sumlog2:              17    18    18   18    18    18    19     21 */
  99/* mem allocated:        128k  256k  256k 256k  256k  256k  512k   2M */
 100/* tot mem: almost 4M */
 101
 102/* NP is shorter, so that it fits on a single line. */
 103#undef NP
 104
 105
 106/* Small hardware gotcha:
 107
 108   The FS50 CAM (VP/VC match registers) always take the lowest channel
 109   number that matches. This is not a problem.
 110
 111   However, they also ignore whether the channel is enabled or
 112   not. This means that if you allocate channel 0 to 1.2 and then
 113   channel 1 to 0.0, then disabeling channel 0 and writing 0 to the
 114   match channel for channel 0 will "steal" the traffic from channel
 115   1, even if you correctly disable channel 0.
 116
 117   Workaround: 
 118
 119   - When disabling channels, write an invalid VP/VC value to the
 120   match register. (We use 0xffffffff, which in the worst case 
 121   matches VP/VC = <maxVP>/<maxVC>, but I expect it not to match
 122   anything as some "when not in use, program to 0" bits are now
 123   programmed to 1...)
 124
 125   - Don't initialize the match registers to 0, as 0.0 is a valid
 126   channel.
 127*/
 128
 129
 130/* Optimization hints and tips.
 131
 132   The FireStream chips are very capable of reducing the amount of
 133   "interrupt-traffic" for the CPU. This driver requests an interrupt on EVERY
 134   action. You could try to minimize this a bit. 
 135
 136   Besides that, the userspace->kernel copy and the PCI bus are the
 137   performance limiting issues for this driver.
 138
 139   You could queue up a bunch of outgoing packets without telling the
 140   FireStream. I'm not sure that's going to win you much though. The
 141   Linux layer won't tell us in advance when it's not going to give us
 142   any more packets in a while. So this is tricky to implement right without
 143   introducing extra delays. 
 144  
 145   -- REW
 146 */
 147
 148
 149
 150
 151/* The strings that define what the RX queue entry is all about. */
 152/* Fujitsu: Please tell me which ones can have a pointer to a 
 153   freepool descriptor! */
 154static char *res_strings[] = {
 155	"RX OK: streaming not EOP", 
 156	"RX OK: streaming EOP", 
 157	"RX OK: Single buffer packet", 
 158	"RX OK: packet mode", 
 159	"RX OK: F4 OAM (end to end)", 
 160	"RX OK: F4 OAM (Segment)", 
 161	"RX OK: F5 OAM (end to end)", 
 162	"RX OK: F5 OAM (Segment)", 
 163	"RX OK: RM cell", 
 164	"RX OK: TRANSP cell", 
 165	"RX OK: TRANSPC cell", 
 166	"Unmatched cell", 
 167	"reserved 12", 
 168	"reserved 13", 
 169	"reserved 14", 
 170	"Unrecognized cell", 
 171	"reserved 16", 
 172	"reassemby abort: AAL5 abort", 
 173	"packet purged", 
 174	"packet ageing timeout", 
 175	"channel ageing timeout", 
 176	"calculated length error", 
 177	"programmed length limit error", 
 178	"aal5 crc32 error", 
 179	"oam transp or transpc crc10 error", 
 180	"reserved 25", 
 181	"reserved 26", 
 182	"reserved 27", 
 183	"reserved 28", 
 184	"reserved 29", 
 185	"reserved 30", 
 186	"reassembly abort: no buffers", 
 187	"receive buffer overflow", 
 188	"change in GFC", 
 189	"receive buffer full", 
 190	"low priority discard - no receive descriptor", 
 191	"low priority discard - missing end of packet", 
 
 
 
 
 192	"reserved 41", 
 193	"reserved 42", 
 194	"reserved 43", 
 195	"reserved 44", 
 196	"reserved 45", 
 197	"reserved 46", 
 198	"reserved 47", 
 199	"reserved 48", 
 200	"reserved 49", 
 201	"reserved 50", 
 202	"reserved 51", 
 203	"reserved 52", 
 204	"reserved 53", 
 205	"reserved 54", 
 206	"reserved 55", 
 207	"reserved 56", 
 208	"reserved 57", 
 209	"reserved 58", 
 210	"reserved 59", 
 211	"reserved 60", 
 212	"reserved 61", 
 213	"reserved 62", 
 214	"reserved 63", 
 215};  
 216
 217static char *irq_bitname[] = {
 218	"LPCO",
 219	"DPCO",
 220	"RBRQ0_W",
 221	"RBRQ1_W",
 222	"RBRQ2_W",
 223	"RBRQ3_W",
 224	"RBRQ0_NF",
 225	"RBRQ1_NF",
 226	"RBRQ2_NF",
 227	"RBRQ3_NF",
 228	"BFP_SC",
 229	"INIT",
 230	"INIT_ERR",
 231	"USCEO",
 232	"UPEC0",
 233	"VPFCO",
 234	"CRCCO",
 235	"HECO",
 236	"TBRQ_W",
 237	"TBRQ_NF",
 238	"CTPQ_E",
 239	"GFC_C0",
 240	"PCI_FTL",
 241	"CSQ_W",
 242	"CSQ_NF",
 243	"EXT_INT",
 244	"RXDMA_S"
 245};
 246
 247
 248#define PHY_EOF -1
 249#define PHY_CLEARALL -2
 250
 251struct reginit_item {
 252	int reg, val;
 253};
 254
 255
 256static struct reginit_item PHY_NTC_INIT[] __devinitdata = {
 257	{ PHY_CLEARALL, 0x40 }, 
 258	{ 0x12,  0x0001 },
 259	{ 0x13,  0x7605 },
 260	{ 0x1A,  0x0001 },
 261	{ 0x1B,  0x0005 },
 262	{ 0x38,  0x0003 },
 263	{ 0x39,  0x0006 },   /* changed here to make loopback */
 264	{ 0x01,  0x5262 },
 265	{ 0x15,  0x0213 },
 266	{ 0x00,  0x0003 },
 267	{ PHY_EOF, 0},    /* -1 signals end of list */
 268};
 269
 270
 271/* Safetyfeature: If the card interrupts more than this number of times
 272   in a jiffy (1/100th of a second) then we just disable the interrupt and
 273   print a message. This prevents the system from hanging. 
 274
 275   150000 packets per second is close to the limit a PC is going to have
 276   anyway. We therefore have to disable this for production. -- REW */
 277#undef IRQ_RATE_LIMIT // 100
 278
 279/* Interrupts work now. Unlike serial cards, ATM cards don't work all
 280   that great without interrupts. -- REW */
 281#undef FS_POLL_FREQ // 100
 282
 283/* 
 284   This driver can spew a whole lot of debugging output at you. If you
 285   need maximum performance, you should disable the DEBUG define. To
 286   aid in debugging in the field, I'm leaving the compile-time debug
 287   features enabled, and disable them "runtime". That allows me to
 288   instruct people with problems to enable debugging without requiring
 289   them to recompile... -- REW
 290*/
 291#define DEBUG
 292
 293#ifdef DEBUG
 294#define fs_dprintk(f, str...) if (fs_debug & f) printk (str)
 295#else
 296#define fs_dprintk(f, str...) /* nothing */
 297#endif
 298
 299
 300static int fs_keystream = 0;
 301
 302#ifdef DEBUG
 303/* I didn't forget to set this to zero before shipping. Hit me with a stick 
 304   if you get this with the debug default not set to zero again. -- REW */
 305static int fs_debug = 0;
 306#else
 307#define fs_debug 0
 308#endif
 309
 310#ifdef MODULE
 311#ifdef DEBUG 
 312module_param(fs_debug, int, 0644);
 313#endif
 314module_param(loopback, int, 0);
 315module_param(num, int, 0);
 316module_param(fs_keystream, int, 0);
 317/* XXX Add rx_buf_sizes, and rx_pool_sizes As per request Amar. -- REW */
 318#endif
 319
 320
 321#define FS_DEBUG_FLOW    0x00000001
 322#define FS_DEBUG_OPEN    0x00000002
 323#define FS_DEBUG_QUEUE   0x00000004
 324#define FS_DEBUG_IRQ     0x00000008
 325#define FS_DEBUG_INIT    0x00000010
 326#define FS_DEBUG_SEND    0x00000020
 327#define FS_DEBUG_PHY     0x00000040
 328#define FS_DEBUG_CLEANUP 0x00000080
 329#define FS_DEBUG_QOS     0x00000100
 330#define FS_DEBUG_TXQ     0x00000200
 331#define FS_DEBUG_ALLOC   0x00000400
 332#define FS_DEBUG_TXMEM   0x00000800
 333#define FS_DEBUG_QSIZE   0x00001000
 334
 335
 336#define func_enter() fs_dprintk(FS_DEBUG_FLOW, "fs: enter %s\n", __func__)
 337#define func_exit()  fs_dprintk(FS_DEBUG_FLOW, "fs: exit  %s\n", __func__)
 338
 339
 340static struct fs_dev *fs_boards = NULL;
 341
 342#ifdef DEBUG
 343
 344static void my_hd (void *addr, int len)
 345{
 346	int j, ch;
 347	unsigned char *ptr = addr;
 348
 349	while (len > 0) {
 350		printk ("%p ", ptr);
 351		for (j=0;j < ((len < 16)?len:16);j++) {
 352			printk ("%02x %s", ptr[j], (j==7)?" ":"");
 353		}
 354		for (  ;j < 16;j++) {
 355			printk ("   %s", (j==7)?" ":"");
 356		}
 357		for (j=0;j < ((len < 16)?len:16);j++) {
 358			ch = ptr[j];
 359			printk ("%c", (ch < 0x20)?'.':((ch > 0x7f)?'.':ch));
 360		}
 361		printk ("\n");
 362		ptr += 16;
 363		len -= 16;
 364	}
 365}
 366#else /* DEBUG */
 367static void my_hd (void *addr, int len){}
 368#endif /* DEBUG */
 369
 370/********** free an skb (as per ATM device driver documentation) **********/
 371
 372/* Hmm. If this is ATM specific, why isn't there an ATM routine for this?
 373 * I copied it over from the ambassador driver. -- REW */
 374
 375static inline void fs_kfree_skb (struct sk_buff * skb) 
 376{
 377	if (ATM_SKB(skb)->vcc->pop)
 378		ATM_SKB(skb)->vcc->pop (ATM_SKB(skb)->vcc, skb);
 379	else
 380		dev_kfree_skb_any (skb);
 381}
 382
 383
 384
 385
 386/* It seems the ATM forum recommends this horribly complicated 16bit
 387 * floating point format. Turns out the Ambassador uses the exact same
 388 * encoding. I just copied it over. If Mitch agrees, I'll move it over
 389 * to the atm_misc file or something like that. (and remove it from 
 390 * here and the ambassador driver) -- REW
 391 */
 392
 393/* The good thing about this format is that it is monotonic. So, 
 394   a conversion routine need not be very complicated. To be able to
 395   round "nearest" we need to take along a few extra bits. Lets
 396   put these after 16 bits, so that we can just return the top 16
 397   bits of the 32bit number as the result:
 398
 399   int mr (unsigned int rate, int r) 
 400     {
 401     int e = 16+9;
 402     static int round[4]={0, 0, 0xffff, 0x8000};
 403     if (!rate) return 0;
 404     while (rate & 0xfc000000) {
 405       rate >>= 1;
 406       e++;
 407     }
 408     while (! (rate & 0xfe000000)) {
 409       rate <<= 1;
 410       e--;
 411     }
 412
 413// Now the mantissa is in positions bit 16-25. Excepf for the "hidden 1" that's in bit 26.
 414     rate &= ~0x02000000;
 415// Next add in the exponent
 416     rate |= e << (16+9);
 417// And perform the rounding:
 418     return (rate + round[r]) >> 16;
 419   }
 420
 421   14 lines-of-code. Compare that with the 120 that the Ambassador
 422   guys needed. (would be 8 lines shorter if I'd try to really reduce
 423   the number of lines:
 424
 425   int mr (unsigned int rate, int r) 
 426   {
 427     int e = 16+9;
 428     static int round[4]={0, 0, 0xffff, 0x8000};
 429     if (!rate) return 0;
 430     for (;  rate & 0xfc000000 ;rate >>= 1, e++);
 431     for (;!(rate & 0xfe000000);rate <<= 1, e--);
 432     return ((rate & ~0x02000000) | (e << (16+9)) + round[r]) >> 16;
 433   }
 434
 435   Exercise for the reader: Remove one more line-of-code, without
 436   cheating. (Just joining two lines is cheating). (I know it's
 437   possible, don't think you've beat me if you found it... If you
 438   manage to lose two lines or more, keep me updated! ;-)
 439
 440   -- REW */
 441
 442
 443#define ROUND_UP      1
 444#define ROUND_DOWN    2
 445#define ROUND_NEAREST 3
 446/********** make rate (not quite as much fun as Horizon) **********/
 447
 448static int make_rate(unsigned int rate, int r,
 449		      u16 *bits, unsigned int *actual)
 450{
 451	unsigned char exp = -1; /* hush gcc */
 452	unsigned int man = -1;  /* hush gcc */
 453  
 454	fs_dprintk (FS_DEBUG_QOS, "make_rate %u", rate);
 455  
 456	/* rates in cells per second, ITU format (nasty 16-bit floating-point)
 457	   given 5-bit e and 9-bit m:
 458	   rate = EITHER (1+m/2^9)*2^e    OR 0
 459	   bits = EITHER 1<<14 | e<<9 | m OR 0
 460	   (bit 15 is "reserved", bit 14 "non-zero")
 461	   smallest rate is 0 (special representation)
 462	   largest rate is (1+511/512)*2^31 = 4290772992 (< 2^32-1)
 463	   smallest non-zero rate is (1+0/512)*2^0 = 1 (> 0)
 464	   simple algorithm:
 465	   find position of top bit, this gives e
 466	   remove top bit and shift (rounding if feeling clever) by 9-e
 467	*/
 468	/* Ambassador ucode bug: please don't set bit 14! so 0 rate not
 469	   representable. // This should move into the ambassador driver
 470	   when properly merged. -- REW */
 471  
 472	if (rate > 0xffc00000U) {
 473		/* larger than largest representable rate */
 474    
 475		if (r == ROUND_UP) {
 476			return -EINVAL;
 477		} else {
 478			exp = 31;
 479			man = 511;
 480		}
 481    
 482	} else if (rate) {
 483		/* representable rate */
 484    
 485		exp = 31;
 486		man = rate;
 487    
 488		/* invariant: rate = man*2^(exp-31) */
 489		while (!(man & (1<<31))) {
 490			exp = exp - 1;
 491			man = man<<1;
 492		}
 493    
 494		/* man has top bit set
 495		   rate = (2^31+(man-2^31))*2^(exp-31)
 496		   rate = (1+(man-2^31)/2^31)*2^exp 
 497		*/
 498		man = man<<1;
 499		man &= 0xffffffffU; /* a nop on 32-bit systems */
 500		/* rate = (1+man/2^32)*2^exp
 501    
 502		   exp is in the range 0 to 31, man is in the range 0 to 2^32-1
 503		   time to lose significance... we want m in the range 0 to 2^9-1
 504		   rounding presents a minor problem... we first decide which way
 505		   we are rounding (based on given rounding direction and possibly
 506		   the bits of the mantissa that are to be discarded).
 507		*/
 508
 509		switch (r) {
 510		case ROUND_DOWN: {
 511			/* just truncate */
 512			man = man>>(32-9);
 513			break;
 514		}
 515		case ROUND_UP: {
 516			/* check all bits that we are discarding */
 517			if (man & (~0U>>9)) {
 518				man = (man>>(32-9)) + 1;
 519				if (man == (1<<9)) {
 520					/* no need to check for round up outside of range */
 521					man = 0;
 522					exp += 1;
 523				}
 524			} else {
 525				man = (man>>(32-9));
 526			}
 527			break;
 528		}
 529		case ROUND_NEAREST: {
 530			/* check msb that we are discarding */
 531			if (man & (1<<(32-9-1))) {
 532				man = (man>>(32-9)) + 1;
 533				if (man == (1<<9)) {
 534					/* no need to check for round up outside of range */
 535					man = 0;
 536					exp += 1;
 537				}
 538			} else {
 539				man = (man>>(32-9));
 540			}
 541			break;
 542		}
 543		}
 544    
 545	} else {
 546		/* zero rate - not representable */
 547    
 548		if (r == ROUND_DOWN) {
 549			return -EINVAL;
 550		} else {
 551			exp = 0;
 552			man = 0;
 553		}
 554	}
 555  
 556	fs_dprintk (FS_DEBUG_QOS, "rate: man=%u, exp=%hu", man, exp);
 557  
 558	if (bits)
 559		*bits = /* (1<<14) | */ (exp<<9) | man;
 560  
 561	if (actual)
 562		*actual = (exp >= 9)
 563			? (1 << exp) + (man << (exp-9))
 564			: (1 << exp) + ((man + (1<<(9-exp-1))) >> (9-exp));
 565  
 566	return 0;
 567}
 568
 569
 570
 571
 572/* FireStream access routines */
 573/* For DEEP-DOWN debugging these can be rigged to intercept accesses to
 574   certain registers or to just log all accesses. */
 575
 576static inline void write_fs (struct fs_dev *dev, int offset, u32 val)
 577{
 578	writel (val, dev->base + offset);
 579}
 580
 581
 582static inline u32  read_fs (struct fs_dev *dev, int offset)
 583{
 584	return readl (dev->base + offset);
 585}
 586
 587
 588
 589static inline struct FS_QENTRY *get_qentry (struct fs_dev *dev, struct queue *q)
 590{
 591	return bus_to_virt (read_fs (dev, Q_WP(q->offset)) & Q_ADDR_MASK);
 592}
 593
 594
 595static void submit_qentry (struct fs_dev *dev, struct queue *q, struct FS_QENTRY *qe)
 596{
 597	u32 wp;
 598	struct FS_QENTRY *cqe;
 599
 600	/* XXX Sanity check: the write pointer can be checked to be 
 601	   still the same as the value passed as qe... -- REW */
 602	/*  udelay (5); */
 603	while ((wp = read_fs (dev, Q_WP (q->offset))) & Q_FULL) {
 604		fs_dprintk (FS_DEBUG_TXQ, "Found queue at %x full. Waiting.\n", 
 605			    q->offset);
 606		schedule ();
 607	}
 608
 609	wp &= ~0xf;
 610	cqe = bus_to_virt (wp);
 611	if (qe != cqe) {
 612		fs_dprintk (FS_DEBUG_TXQ, "q mismatch! %p %p\n", qe, cqe);
 613	}
 614
 615	write_fs (dev, Q_WP(q->offset), Q_INCWRAP);
 616
 617	{
 618		static int c;
 619		if (!(c++ % 100))
 620			{
 621				int rp, wp;
 622				rp =  read_fs (dev, Q_RP(q->offset));
 623				wp =  read_fs (dev, Q_WP(q->offset));
 624				fs_dprintk (FS_DEBUG_TXQ, "q at %d: %x-%x: %x entries.\n", 
 625					    q->offset, rp, wp, wp-rp);
 626			}
 627	}
 628}
 629
 630#ifdef DEBUG_EXTRA
 631static struct FS_QENTRY pq[60];
 632static int qp;
 633
 634static struct FS_BPENTRY dq[60];
 635static int qd;
 636static void *da[60];
 637#endif 
 638
 639static void submit_queue (struct fs_dev *dev, struct queue *q, 
 640			  u32 cmd, u32 p1, u32 p2, u32 p3)
 641{
 642	struct FS_QENTRY *qe;
 643
 644	qe = get_qentry (dev, q);
 645	qe->cmd = cmd;
 646	qe->p0 = p1;
 647	qe->p1 = p2;
 648	qe->p2 = p3;
 649	submit_qentry (dev,  q, qe);
 650
 651#ifdef DEBUG_EXTRA
 652	pq[qp].cmd = cmd;
 653	pq[qp].p0 = p1;
 654	pq[qp].p1 = p2;
 655	pq[qp].p2 = p3;
 656	qp++;
 657	if (qp >= 60) qp = 0;
 658#endif
 659}
 660
 661/* Test the "other" way one day... -- REW */
 662#if 1
 663#define submit_command submit_queue
 664#else
 665
 666static void submit_command (struct fs_dev *dev, struct queue *q, 
 667			    u32 cmd, u32 p1, u32 p2, u32 p3)
 668{
 669	write_fs (dev, CMDR0, cmd);
 670	write_fs (dev, CMDR1, p1);
 671	write_fs (dev, CMDR2, p2);
 672	write_fs (dev, CMDR3, p3);
 673}
 674#endif
 675
 676
 677
 678static void process_return_queue (struct fs_dev *dev, struct queue *q)
 679{
 680	long rq;
 681	struct FS_QENTRY *qe;
 682	void *tc;
 683  
 684	while (!((rq = read_fs (dev, Q_RP(q->offset))) & Q_EMPTY)) {
 685		fs_dprintk (FS_DEBUG_QUEUE, "reaping return queue entry at %lx\n", rq); 
 686		qe = bus_to_virt (rq);
 687    
 688		fs_dprintk (FS_DEBUG_QUEUE, "queue entry: %08x %08x %08x %08x. (%d)\n", 
 689			    qe->cmd, qe->p0, qe->p1, qe->p2, STATUS_CODE (qe));
 690
 691		switch (STATUS_CODE (qe)) {
 692		case 5:
 693			tc = bus_to_virt (qe->p0);
 694			fs_dprintk (FS_DEBUG_ALLOC, "Free tc: %p\n", tc);
 695			kfree (tc);
 696			break;
 697		}
 698    
 699		write_fs (dev, Q_RP(q->offset), Q_INCWRAP);
 700	}
 701}
 702
 703
 704static void process_txdone_queue (struct fs_dev *dev, struct queue *q)
 705{
 706	long rq;
 707	long tmp;
 708	struct FS_QENTRY *qe;
 709	struct sk_buff *skb;
 710	struct FS_BPENTRY *td;
 711
 712	while (!((rq = read_fs (dev, Q_RP(q->offset))) & Q_EMPTY)) {
 713		fs_dprintk (FS_DEBUG_QUEUE, "reaping txdone entry at %lx\n", rq); 
 714		qe = bus_to_virt (rq);
 715    
 716		fs_dprintk (FS_DEBUG_QUEUE, "queue entry: %08x %08x %08x %08x: %d\n", 
 717			    qe->cmd, qe->p0, qe->p1, qe->p2, STATUS_CODE (qe));
 718
 719		if (STATUS_CODE (qe) != 2)
 720			fs_dprintk (FS_DEBUG_TXMEM, "queue entry: %08x %08x %08x %08x: %d\n", 
 721				    qe->cmd, qe->p0, qe->p1, qe->p2, STATUS_CODE (qe));
 722
 723
 724		switch (STATUS_CODE (qe)) {
 725		case 0x01: /* This is for AAL0 where we put the chip in streaming mode */
 726			/* Fall through */
 727		case 0x02:
 728			/* Process a real txdone entry. */
 729			tmp = qe->p0;
 730			if (tmp & 0x0f)
 731				printk (KERN_WARNING "td not aligned: %ld\n", tmp);
 732			tmp &= ~0x0f;
 733			td = bus_to_virt (tmp);
 734
 735			fs_dprintk (FS_DEBUG_QUEUE, "Pool entry: %08x %08x %08x %08x %p.\n", 
 736				    td->flags, td->next, td->bsa, td->aal_bufsize, td->skb );
 737      
 738			skb = td->skb;
 739			if (skb == FS_VCC (ATM_SKB(skb)->vcc)->last_skb) {
 740				wake_up_interruptible (& FS_VCC (ATM_SKB(skb)->vcc)->close_wait);
 741				FS_VCC (ATM_SKB(skb)->vcc)->last_skb = NULL;
 
 742			}
 743			td->dev->ntxpckts--;
 744
 745			{
 746				static int c=0;
 747	
 748				if (!(c++ % 100)) {
 749					fs_dprintk (FS_DEBUG_QSIZE, "[%d]", td->dev->ntxpckts);
 750				}
 751			}
 752
 753			atomic_inc(&ATM_SKB(skb)->vcc->stats->tx);
 754
 755			fs_dprintk (FS_DEBUG_TXMEM, "i");
 756			fs_dprintk (FS_DEBUG_ALLOC, "Free t-skb: %p\n", skb);
 757			fs_kfree_skb (skb);
 758
 759			fs_dprintk (FS_DEBUG_ALLOC, "Free trans-d: %p\n", td); 
 760			memset (td, ATM_POISON_FREE, sizeof(struct FS_BPENTRY));
 761			kfree (td);
 762			break;
 763		default:
 764			/* Here we get the tx purge inhibit command ... */
 765			/* Action, I believe, is "don't do anything". -- REW */
 766			;
 767		}
 768    
 769		write_fs (dev, Q_RP(q->offset), Q_INCWRAP);
 770	}
 771}
 772
 773
 774static void process_incoming (struct fs_dev *dev, struct queue *q)
 775{
 776	long rq;
 777	struct FS_QENTRY *qe;
 778	struct FS_BPENTRY *pe;    
 779	struct sk_buff *skb;
 780	unsigned int channo;
 781	struct atm_vcc *atm_vcc;
 782
 783	while (!((rq = read_fs (dev, Q_RP(q->offset))) & Q_EMPTY)) {
 784		fs_dprintk (FS_DEBUG_QUEUE, "reaping incoming queue entry at %lx\n", rq); 
 785		qe = bus_to_virt (rq);
 786    
 787		fs_dprintk (FS_DEBUG_QUEUE, "queue entry: %08x %08x %08x %08x.  ", 
 788			    qe->cmd, qe->p0, qe->p1, qe->p2);
 789
 790		fs_dprintk (FS_DEBUG_QUEUE, "-> %x: %s\n", 
 791			    STATUS_CODE (qe), 
 792			    res_strings[STATUS_CODE(qe)]);
 793
 794		pe = bus_to_virt (qe->p0);
 795		fs_dprintk (FS_DEBUG_QUEUE, "Pool entry: %08x %08x %08x %08x %p %p.\n", 
 796			    pe->flags, pe->next, pe->bsa, pe->aal_bufsize, 
 797			    pe->skb, pe->fp);
 798      
 799		channo = qe->cmd & 0xffff;
 800
 801		if (channo < dev->nchannels)
 802			atm_vcc = dev->atm_vccs[channo];
 803		else
 804			atm_vcc = NULL;
 805
 806		/* Single buffer packet */
 807		switch (STATUS_CODE (qe)) {
 808		case 0x1:
 809			/* Fall through for streaming mode */
 
 810		case 0x2:/* Packet received OK.... */
 811			if (atm_vcc) {
 812				skb = pe->skb;
 813				pe->fp->n--;
 814#if 0
 815				fs_dprintk (FS_DEBUG_QUEUE, "Got skb: %p\n", skb);
 816				if (FS_DEBUG_QUEUE & fs_debug) my_hd (bus_to_virt (pe->bsa), 0x20);
 817#endif
 818				skb_put (skb, qe->p1 & 0xffff); 
 819				ATM_SKB(skb)->vcc = atm_vcc;
 820				atomic_inc(&atm_vcc->stats->rx);
 821				__net_timestamp(skb);
 822				fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p (pushed)\n", skb);
 823				atm_vcc->push (atm_vcc, skb);
 824				fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", pe);
 825				kfree (pe);
 826			} else {
 827				printk (KERN_ERR "Got a receive on a non-open channel %d.\n", channo);
 828			}
 829			break;
 830		case 0x17:/* AAL 5 CRC32 error. IFF the length field is nonzero, a buffer
 831			     has been consumed and needs to be processed. -- REW */
 832			if (qe->p1 & 0xffff) {
 833				pe = bus_to_virt (qe->p0);
 834				pe->fp->n--;
 835				fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", pe->skb);
 836				dev_kfree_skb_any (pe->skb);
 837				fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", pe);
 838				kfree (pe);
 839			}
 840			if (atm_vcc)
 841				atomic_inc(&atm_vcc->stats->rx_drop);
 842			break;
 843		case 0x1f: /*  Reassembly abort: no buffers. */
 844			/* Silently increment error counter. */
 845			if (atm_vcc)
 846				atomic_inc(&atm_vcc->stats->rx_drop);
 847			break;
 848		default: /* Hmm. Haven't written the code to handle the others yet... -- REW */
 849			printk (KERN_WARNING "Don't know what to do with RX status %x: %s.\n", 
 850				STATUS_CODE(qe), res_strings[STATUS_CODE (qe)]);
 851		}
 852		write_fs (dev, Q_RP(q->offset), Q_INCWRAP);
 853	}
 854}
 855
 856
 857
 858#define DO_DIRECTION(tp) ((tp)->traffic_class != ATM_NONE)
 859
 860static int fs_open(struct atm_vcc *atm_vcc)
 861{
 862	struct fs_dev *dev;
 863	struct fs_vcc *vcc;
 864	struct fs_transmit_config *tc;
 865	struct atm_trafprm * txtp;
 866	struct atm_trafprm * rxtp;
 867	/*  struct fs_receive_config *rc;*/
 868	/*  struct FS_QENTRY *qe; */
 869	int error;
 870	int bfp;
 871	int to;
 872	unsigned short tmc0;
 873	short vpi = atm_vcc->vpi;
 874	int vci = atm_vcc->vci;
 875
 876	func_enter ();
 877
 878	dev = FS_DEV(atm_vcc->dev);
 879	fs_dprintk (FS_DEBUG_OPEN, "fs: open on dev: %p, vcc at %p\n", 
 880		    dev, atm_vcc);
 881
 882	if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
 883		set_bit(ATM_VF_ADDR, &atm_vcc->flags);
 884
 885	if ((atm_vcc->qos.aal != ATM_AAL5) &&
 886	    (atm_vcc->qos.aal != ATM_AAL2))
 887	  return -EINVAL; /* XXX AAL0 */
 888
 889	fs_dprintk (FS_DEBUG_OPEN, "fs: (itf %d): open %d.%d\n", 
 890		    atm_vcc->dev->number, atm_vcc->vpi, atm_vcc->vci);	
 891
 892	/* XXX handle qos parameters (rate limiting) ? */
 893
 894	vcc = kmalloc(sizeof(struct fs_vcc), GFP_KERNEL);
 895	fs_dprintk (FS_DEBUG_ALLOC, "Alloc VCC: %p(%Zd)\n", vcc, sizeof(struct fs_vcc));
 896	if (!vcc) {
 897		clear_bit(ATM_VF_ADDR, &atm_vcc->flags);
 898		return -ENOMEM;
 899	}
 900  
 901	atm_vcc->dev_data = vcc;
 902	vcc->last_skb = NULL;
 903
 904	init_waitqueue_head (&vcc->close_wait);
 905
 906	txtp = &atm_vcc->qos.txtp;
 907	rxtp = &atm_vcc->qos.rxtp;
 908
 909	if (!test_bit(ATM_VF_PARTIAL, &atm_vcc->flags)) {
 910		if (IS_FS50(dev)) {
 911			/* Increment the channel numer: take a free one next time.  */
 912			for (to=33;to;to--, dev->channo++) {
 913				/* We only have 32 channels */
 914				if (dev->channo >= 32)
 915					dev->channo = 0;
 916				/* If we need to do RX, AND the RX is inuse, try the next */
 917				if (DO_DIRECTION(rxtp) && dev->atm_vccs[dev->channo])
 918					continue;
 919				/* If we need to do TX, AND the TX is inuse, try the next */
 920				if (DO_DIRECTION(txtp) && test_bit (dev->channo, dev->tx_inuse))
 921					continue;
 922				/* Ok, both are free! (or not needed) */
 923				break;
 924			}
 925			if (!to) {
 926				printk ("No more free channels for FS50..\n");
 
 927				return -EBUSY;
 928			}
 929			vcc->channo = dev->channo;
 930			dev->channo &= dev->channel_mask;
 931      
 932		} else {
 933			vcc->channo = (vpi << FS155_VCI_BITS) | (vci);
 934			if (((DO_DIRECTION(rxtp) && dev->atm_vccs[vcc->channo])) ||
 935			    ( DO_DIRECTION(txtp) && test_bit (vcc->channo, dev->tx_inuse))) {
 936				printk ("Channel is in use for FS155.\n");
 
 937				return -EBUSY;
 938			}
 939		}
 940		fs_dprintk (FS_DEBUG_OPEN, "OK. Allocated channel %x(%d).\n", 
 941			    vcc->channo, vcc->channo);
 942	}
 943
 944	if (DO_DIRECTION (txtp)) {
 945		tc = kmalloc (sizeof (struct fs_transmit_config), GFP_KERNEL);
 946		fs_dprintk (FS_DEBUG_ALLOC, "Alloc tc: %p(%Zd)\n",
 947			    tc, sizeof (struct fs_transmit_config));
 948		if (!tc) {
 949			fs_dprintk (FS_DEBUG_OPEN, "fs: can't alloc transmit_config.\n");
 
 950			return -ENOMEM;
 951		}
 952
 953		/* Allocate the "open" entry from the high priority txq. This makes
 954		   it most likely that the chip will notice it. It also prevents us
 955		   from having to wait for completion. On the other hand, we may
 956		   need to wait for completion anyway, to see if it completed
 957		   successfully. */
 958
 959		switch (atm_vcc->qos.aal) {
 960		case ATM_AAL2:
 961		case ATM_AAL0:
 962		  tc->flags = 0
 963		    | TC_FLAGS_TRANSPARENT_PAYLOAD
 964		    | TC_FLAGS_PACKET
 965		    | (1 << 28)
 966		    | TC_FLAGS_TYPE_UBR /* XXX Change to VBR -- PVDL */
 967		    | TC_FLAGS_CAL0;
 968		  break;
 969		case ATM_AAL5:
 970		  tc->flags = 0
 971			| TC_FLAGS_AAL5
 972			| TC_FLAGS_PACKET  /* ??? */
 973			| TC_FLAGS_TYPE_CBR
 974			| TC_FLAGS_CAL0;
 975		  break;
 976		default:
 977			printk ("Unknown aal: %d\n", atm_vcc->qos.aal);
 978			tc->flags = 0;
 979		}
 980		/* Docs are vague about this atm_hdr field. By the way, the FS
 981		 * chip makes odd errors if lower bits are set.... -- REW */
 982		tc->atm_hdr =  (vpi << 20) | (vci << 4); 
 983		tmc0 = 0;
 984		{
 985			int pcr = atm_pcr_goal (txtp);
 986
 987			fs_dprintk (FS_DEBUG_OPEN, "pcr = %d.\n", pcr);
 988
 989			/* XXX Hmm. officially we're only allowed to do this if rounding 
 990			   is round_down -- REW */
 991			if (IS_FS50(dev)) {
 992				if (pcr > 51840000/53/8)  pcr = 51840000/53/8;
 993			} else {
 994				if (pcr > 155520000/53/8) pcr = 155520000/53/8;
 995			}
 996			if (!pcr) {
 997				/* no rate cap */
 998				tmc0 = IS_FS50(dev)?0x61BE:0x64c9; /* Just copied over the bits from Fujitsu -- REW */
 999			} else {
1000				int r;
1001				if (pcr < 0) {
1002					r = ROUND_DOWN;
1003					pcr = -pcr;
1004				} else {
1005					r = ROUND_UP;
1006				}
1007				error = make_rate (pcr, r, &tmc0, NULL);
1008				if (error) {
1009					kfree(tc);
 
1010					return error;
1011				}
1012			}
1013			fs_dprintk (FS_DEBUG_OPEN, "pcr = %d.\n", pcr);
1014		}
1015      
1016		tc->TMC[0] = tmc0 | 0x4000;
1017		tc->TMC[1] = 0; /* Unused */
1018		tc->TMC[2] = 0; /* Unused */
1019		tc->TMC[3] = 0; /* Unused */
1020    
1021		tc->spec = 0;    /* UTOPIA address, UDF, HEC: Unused -> 0 */
1022		tc->rtag[0] = 0; /* What should I do with routing tags??? 
1023				    -- Not used -- AS -- Thanks -- REW*/
1024		tc->rtag[1] = 0;
1025		tc->rtag[2] = 0;
1026
1027		if (fs_debug & FS_DEBUG_OPEN) {
1028			fs_dprintk (FS_DEBUG_OPEN, "TX config record:\n");
1029			my_hd (tc, sizeof (*tc));
1030		}
1031
1032		/* We now use the "submit_command" function to submit commands to
1033		   the firestream. There is a define up near the definition of
1034		   that routine that switches this routine between immediate write
1035		   to the immediate command registers and queuing the commands in
1036		   the HPTXQ for execution. This last technique might be more
1037		   efficient if we know we're going to submit a whole lot of
1038		   commands in one go, but this driver is not setup to be able to
1039		   use such a construct. So it probably doen't matter much right
1040		   now. -- REW */
1041    
1042		/* The command is IMMediate and INQueue. The parameters are out-of-line.. */
1043		submit_command (dev, &dev->hp_txq, 
1044				QE_CMD_CONFIG_TX | QE_CMD_IMM_INQ | vcc->channo,
1045				virt_to_bus (tc), 0, 0);
1046
1047		submit_command (dev, &dev->hp_txq, 
1048				QE_CMD_TX_EN | QE_CMD_IMM_INQ | vcc->channo,
1049				0, 0, 0);
1050		set_bit (vcc->channo, dev->tx_inuse);
1051	}
1052
1053	if (DO_DIRECTION (rxtp)) {
1054		dev->atm_vccs[vcc->channo] = atm_vcc;
1055
1056		for (bfp = 0;bfp < FS_NR_FREE_POOLS; bfp++)
1057			if (atm_vcc->qos.rxtp.max_sdu <= dev->rx_fp[bfp].bufsize) break;
1058		if (bfp >= FS_NR_FREE_POOLS) {
1059			fs_dprintk (FS_DEBUG_OPEN, "No free pool fits sdu: %d.\n", 
1060				    atm_vcc->qos.rxtp.max_sdu);
1061			/* XXX Cleanup? -- Would just calling fs_close work??? -- REW */
1062
1063			/* XXX clear tx inuse. Close TX part? */
1064			dev->atm_vccs[vcc->channo] = NULL;
1065			kfree (vcc);
1066			return -EINVAL;
1067		}
1068
1069		switch (atm_vcc->qos.aal) {
1070		case ATM_AAL0:
1071		case ATM_AAL2:
1072			submit_command (dev, &dev->hp_txq,
1073					QE_CMD_CONFIG_RX | QE_CMD_IMM_INQ | vcc->channo,
1074					RC_FLAGS_TRANSP |
1075					RC_FLAGS_BFPS_BFP * bfp |
1076					RC_FLAGS_RXBM_PSB, 0, 0);
1077			break;
1078		case ATM_AAL5:
1079			submit_command (dev, &dev->hp_txq,
1080					QE_CMD_CONFIG_RX | QE_CMD_IMM_INQ | vcc->channo,
1081					RC_FLAGS_AAL5 |
1082					RC_FLAGS_BFPS_BFP * bfp |
1083					RC_FLAGS_RXBM_PSB, 0, 0);
1084			break;
1085		};
1086		if (IS_FS50 (dev)) {
1087			submit_command (dev, &dev->hp_txq, 
1088					QE_CMD_REG_WR | QE_CMD_IMM_INQ,
1089					0x80 + vcc->channo,
1090					(vpi << 16) | vci, 0 ); /* XXX -- Use defines. */
1091		}
1092		submit_command (dev, &dev->hp_txq, 
1093				QE_CMD_RX_EN | QE_CMD_IMM_INQ | vcc->channo,
1094				0, 0, 0);
1095	}
1096    
1097	/* Indicate we're done! */
1098	set_bit(ATM_VF_READY, &atm_vcc->flags);
1099
1100	func_exit ();
1101	return 0;
1102}
1103
1104
1105static void fs_close(struct atm_vcc *atm_vcc)
1106{
1107	struct fs_dev *dev = FS_DEV (atm_vcc->dev);
1108	struct fs_vcc *vcc = FS_VCC (atm_vcc);
1109	struct atm_trafprm * txtp;
1110	struct atm_trafprm * rxtp;
1111
1112	func_enter ();
1113
1114	clear_bit(ATM_VF_READY, &atm_vcc->flags);
1115
1116	fs_dprintk (FS_DEBUG_QSIZE, "--==**[%d]**==--", dev->ntxpckts);
1117	if (vcc->last_skb) {
1118		fs_dprintk (FS_DEBUG_QUEUE, "Waiting for skb %p to be sent.\n", 
1119			    vcc->last_skb);
1120		/* We're going to wait for the last packet to get sent on this VC. It would
1121		   be impolite not to send them don't you think? 
1122		   XXX
1123		   We don't know which packets didn't get sent. So if we get interrupted in 
1124		   this sleep_on, we'll lose any reference to these packets. Memory leak!
1125		   On the other hand, it's awfully convenient that we can abort a "close" that
1126		   is taking too long. Maybe just use non-interruptible sleep on? -- REW */
1127		interruptible_sleep_on (& vcc->close_wait);
1128	}
1129
1130	txtp = &atm_vcc->qos.txtp;
1131	rxtp = &atm_vcc->qos.rxtp;
1132  
1133
1134	/* See App note XXX (Unpublished as of now) for the reason for the 
1135	   removal of the "CMD_IMM_INQ" part of the TX_PURGE_INH... -- REW */
1136
1137	if (DO_DIRECTION (txtp)) {
1138		submit_command (dev,  &dev->hp_txq,
1139				QE_CMD_TX_PURGE_INH | /*QE_CMD_IMM_INQ|*/ vcc->channo, 0,0,0);
1140		clear_bit (vcc->channo, dev->tx_inuse);
1141	}
1142
1143	if (DO_DIRECTION (rxtp)) {
1144		submit_command (dev,  &dev->hp_txq,
1145				QE_CMD_RX_PURGE_INH | QE_CMD_IMM_INQ | vcc->channo, 0,0,0);
1146		dev->atm_vccs [vcc->channo] = NULL;
1147  
1148		/* This means that this is configured as a receive channel */
1149		if (IS_FS50 (dev)) {
1150			/* Disable the receive filter. Is 0/0 indeed an invalid receive
1151			   channel? -- REW.  Yes it is. -- Hang. Ok. I'll use -1
1152			   (0xfff...) -- REW */
1153			submit_command (dev, &dev->hp_txq, 
1154					QE_CMD_REG_WR | QE_CMD_IMM_INQ,
1155					0x80 + vcc->channo, -1, 0 ); 
1156		}
1157	}
1158
1159	fs_dprintk (FS_DEBUG_ALLOC, "Free vcc: %p\n", vcc);
1160	kfree (vcc);
1161
1162	func_exit ();
1163}
1164
1165
1166static int fs_send (struct atm_vcc *atm_vcc, struct sk_buff *skb)
1167{
1168	struct fs_dev *dev = FS_DEV (atm_vcc->dev);
1169	struct fs_vcc *vcc = FS_VCC (atm_vcc);
1170	struct FS_BPENTRY *td;
1171
1172	func_enter ();
1173
1174	fs_dprintk (FS_DEBUG_TXMEM, "I");
1175	fs_dprintk (FS_DEBUG_SEND, "Send: atm_vcc %p skb %p vcc %p dev %p\n", 
1176		    atm_vcc, skb, vcc, dev);
1177
1178	fs_dprintk (FS_DEBUG_ALLOC, "Alloc t-skb: %p (atm_send)\n", skb);
1179
1180	ATM_SKB(skb)->vcc = atm_vcc;
1181
1182	vcc->last_skb = skb;
1183
1184	td = kmalloc (sizeof (struct FS_BPENTRY), GFP_ATOMIC);
1185	fs_dprintk (FS_DEBUG_ALLOC, "Alloc transd: %p(%Zd)\n", td, sizeof (struct FS_BPENTRY));
1186	if (!td) {
1187		/* Oops out of mem */
1188		return -ENOMEM;
1189	}
1190
1191	fs_dprintk (FS_DEBUG_SEND, "first word in buffer: %x\n", 
1192		    *(int *) skb->data);
1193
1194	td->flags =  TD_EPI | TD_DATA | skb->len;
1195	td->next = 0;
1196	td->bsa  = virt_to_bus (skb->data);
1197	td->skb = skb;
1198	td->dev = dev;
1199	dev->ntxpckts++;
1200
1201#ifdef DEBUG_EXTRA
1202	da[qd] = td;
1203	dq[qd].flags = td->flags;
1204	dq[qd].next  = td->next;
1205	dq[qd].bsa   = td->bsa;
1206	dq[qd].skb   = td->skb;
1207	dq[qd].dev   = td->dev;
1208	qd++;
1209	if (qd >= 60) qd = 0;
1210#endif
1211
1212	submit_queue (dev, &dev->hp_txq, 
1213		      QE_TRANSMIT_DE | vcc->channo,
1214		      virt_to_bus (td), 0, 
1215		      virt_to_bus (td));
1216
1217	fs_dprintk (FS_DEBUG_QUEUE, "in send: txq %d txrq %d\n", 
1218		    read_fs (dev, Q_EA (dev->hp_txq.offset)) -
1219		    read_fs (dev, Q_SA (dev->hp_txq.offset)),
1220		    read_fs (dev, Q_EA (dev->tx_relq.offset)) -
1221		    read_fs (dev, Q_SA (dev->tx_relq.offset)));
1222
1223	func_exit ();
1224	return 0;
1225}
1226
1227
1228/* Some function placeholders for functions we don't yet support. */
1229
1230#if 0
1231static int fs_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1232{
1233	func_enter ();
1234	func_exit ();
1235	return -ENOIOCTLCMD;
1236}
1237
1238
1239static int fs_getsockopt(struct atm_vcc *vcc,int level,int optname,
1240			 void __user *optval,int optlen)
1241{
1242	func_enter ();
1243	func_exit ();
1244	return 0;
1245}
1246
1247
1248static int fs_setsockopt(struct atm_vcc *vcc,int level,int optname,
1249			 void __user *optval,unsigned int optlen)
1250{
1251	func_enter ();
1252	func_exit ();
1253	return 0;
1254}
1255
1256
1257static void fs_phy_put(struct atm_dev *dev,unsigned char value,
1258		       unsigned long addr)
1259{
1260	func_enter ();
1261	func_exit ();
1262}
1263
1264
1265static unsigned char fs_phy_get(struct atm_dev *dev,unsigned long addr)
1266{
1267	func_enter ();
1268	func_exit ();
1269	return 0;
1270}
1271
1272
1273static int fs_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flags)
1274{
1275	func_enter ();
1276	func_exit ();
1277	return 0;
1278};
1279
1280#endif
1281
1282
1283static const struct atmdev_ops ops = {
1284	.open =         fs_open,
1285	.close =        fs_close,
1286	.send =         fs_send,
1287	.owner =        THIS_MODULE,
1288	/* ioctl:          fs_ioctl, */
1289	/* getsockopt:     fs_getsockopt, */
1290	/* setsockopt:     fs_setsockopt, */
1291	/* change_qos:     fs_change_qos, */
1292
1293	/* For now implement these internally here... */  
1294	/* phy_put:        fs_phy_put, */
1295	/* phy_get:        fs_phy_get, */
1296};
1297
1298
1299static void __devinit undocumented_pci_fix (struct pci_dev *pdev)
1300{
1301	u32 tint;
1302
1303	/* The Windows driver says: */
1304	/* Switch off FireStream Retry Limit Threshold 
1305	 */
1306
1307	/* The register at 0x28 is documented as "reserved", no further
1308	   comments. */
1309
1310	pci_read_config_dword (pdev, 0x28, &tint);
1311	if (tint != 0x80) {
1312		tint = 0x80;
1313		pci_write_config_dword (pdev, 0x28, tint);
1314	}
1315}
1316
1317
1318
1319/**************************************************************************
1320 *                              PHY routines                              *
1321 **************************************************************************/
1322
1323static void __devinit write_phy (struct fs_dev *dev, int regnum, int val)
1324{
1325	submit_command (dev,  &dev->hp_txq, QE_CMD_PRP_WR | QE_CMD_IMM_INQ,
1326			regnum, val, 0);
1327}
1328
1329static int __devinit init_phy (struct fs_dev *dev, struct reginit_item *reginit)
1330{
1331	int i;
1332
1333	func_enter ();
1334	while (reginit->reg != PHY_EOF) {
1335		if (reginit->reg == PHY_CLEARALL) {
1336			/* "PHY_CLEARALL means clear all registers. Numregisters is in "val". */
1337			for (i=0;i<reginit->val;i++) {
1338				write_phy (dev, i, 0);
1339			}
1340		} else {
1341			write_phy (dev, reginit->reg, reginit->val);
1342		}
1343		reginit++;
1344	}
1345	func_exit ();
1346	return 0;
1347}
1348
1349static void reset_chip (struct fs_dev *dev)
1350{
1351	int i;
1352
1353	write_fs (dev, SARMODE0, SARMODE0_SRTS0);
1354
1355	/* Undocumented delay */
1356	udelay (128);
1357
1358	/* The "internal registers are documented to all reset to zero, but 
1359	   comments & code in the Windows driver indicates that the pools are
1360	   NOT reset. */
1361	for (i=0;i < FS_NR_FREE_POOLS;i++) {
1362		write_fs (dev, FP_CNF (RXB_FP(i)), 0);
1363		write_fs (dev, FP_SA  (RXB_FP(i)), 0);
1364		write_fs (dev, FP_EA  (RXB_FP(i)), 0);
1365		write_fs (dev, FP_CNT (RXB_FP(i)), 0);
1366		write_fs (dev, FP_CTU (RXB_FP(i)), 0);
1367	}
1368
1369	/* The same goes for the match channel registers, although those are
1370	   NOT documented that way in the Windows driver. -- REW */
1371	/* The Windows driver DOES write 0 to these registers somewhere in
1372	   the init sequence. However, a small hardware-feature, will
1373	   prevent reception of data on VPI/VCI = 0/0 (Unless the channel
1374	   allocated happens to have no disabled channels that have a lower
1375	   number. -- REW */
1376
1377	/* Clear the match channel registers. */
1378	if (IS_FS50 (dev)) {
1379		for (i=0;i<FS50_NR_CHANNELS;i++) {
1380			write_fs (dev, 0x200 + i * 4, -1);
1381		}
1382	}
1383}
1384
1385static void __devinit *aligned_kmalloc (int size, gfp_t flags, int alignment)
1386{
1387	void  *t;
1388
1389	if (alignment <= 0x10) {
1390		t = kmalloc (size, flags);
1391		if ((unsigned long)t & (alignment-1)) {
1392			printk ("Kmalloc doesn't align things correctly! %p\n", t);
1393			kfree (t);
1394			return aligned_kmalloc (size, flags, alignment * 4);
1395		}
1396		return t;
1397	}
1398	printk (KERN_ERR "Request for > 0x10 alignment not yet implemented (hard!)\n");
1399	return NULL;
1400}
1401
1402static int __devinit init_q (struct fs_dev *dev, 
1403			  struct queue *txq, int queue, int nentries, int is_rq)
1404{
1405	int sz = nentries * sizeof (struct FS_QENTRY);
1406	struct FS_QENTRY *p;
1407
1408	func_enter ();
1409
1410	fs_dprintk (FS_DEBUG_INIT, "Inititing queue at %x: %d entries:\n", 
1411		    queue, nentries);
1412
1413	p = aligned_kmalloc (sz, GFP_KERNEL, 0x10);
1414	fs_dprintk (FS_DEBUG_ALLOC, "Alloc queue: %p(%d)\n", p, sz);
1415
1416	if (!p) return 0;
1417
1418	write_fs (dev, Q_SA(queue), virt_to_bus(p));
1419	write_fs (dev, Q_EA(queue), virt_to_bus(p+nentries-1));
1420	write_fs (dev, Q_WP(queue), virt_to_bus(p));
1421	write_fs (dev, Q_RP(queue), virt_to_bus(p));
1422	if (is_rq) {
1423		/* Configuration for the receive queue: 0: interrupt immediately,
1424		   no pre-warning to empty queues: We do our best to keep the
1425		   queue filled anyway. */
1426		write_fs (dev, Q_CNF(queue), 0 ); 
1427	}
1428
1429	txq->sa = p;
1430	txq->ea = p;
1431	txq->offset = queue; 
1432
1433	func_exit ();
1434	return 1;
1435}
1436
1437
1438static int __devinit init_fp (struct fs_dev *dev, 
1439			   struct freepool *fp, int queue, int bufsize, int nr_buffers)
1440{
1441	func_enter ();
1442
1443	fs_dprintk (FS_DEBUG_INIT, "Inititing free pool at %x:\n", queue);
1444
1445	write_fs (dev, FP_CNF(queue), (bufsize * RBFP_RBS) | RBFP_RBSVAL | RBFP_CME);
1446	write_fs (dev, FP_SA(queue),  0);
1447	write_fs (dev, FP_EA(queue),  0);
1448	write_fs (dev, FP_CTU(queue), 0);
1449	write_fs (dev, FP_CNT(queue), 0);
1450
1451	fp->offset = queue; 
1452	fp->bufsize = bufsize;
1453	fp->nr_buffers = nr_buffers;
1454
1455	func_exit ();
1456	return 1;
1457}
1458
1459
1460static inline int nr_buffers_in_freepool (struct fs_dev *dev, struct freepool *fp)
1461{
1462#if 0
1463	/* This seems to be unreliable.... */
1464	return read_fs (dev, FP_CNT (fp->offset));
1465#else
1466	return fp->n;
1467#endif
1468}
1469
1470
1471/* Check if this gets going again if a pool ever runs out.  -- Yes, it
1472   does. I've seen "receive abort: no buffers" and things started
1473   working again after that...  -- REW */
1474
1475static void top_off_fp (struct fs_dev *dev, struct freepool *fp,
1476			gfp_t gfp_flags)
1477{
1478	struct FS_BPENTRY *qe, *ne;
1479	struct sk_buff *skb;
1480	int n = 0;
1481	u32 qe_tmp;
1482
1483	fs_dprintk (FS_DEBUG_QUEUE, "Topping off queue at %x (%d-%d/%d)\n", 
1484		    fp->offset, read_fs (dev, FP_CNT (fp->offset)), fp->n, 
1485		    fp->nr_buffers);
1486	while (nr_buffers_in_freepool(dev, fp) < fp->nr_buffers) {
1487
1488		skb = alloc_skb (fp->bufsize, gfp_flags);
1489		fs_dprintk (FS_DEBUG_ALLOC, "Alloc rec-skb: %p(%d)\n", skb, fp->bufsize);
1490		if (!skb) break;
1491		ne = kmalloc (sizeof (struct FS_BPENTRY), gfp_flags);
1492		fs_dprintk (FS_DEBUG_ALLOC, "Alloc rec-d: %p(%Zd)\n", ne, sizeof (struct FS_BPENTRY));
1493		if (!ne) {
1494			fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", skb);
1495			dev_kfree_skb_any (skb);
1496			break;
1497		}
1498
1499		fs_dprintk (FS_DEBUG_QUEUE, "Adding skb %p desc %p -> %p(%p) ", 
1500			    skb, ne, skb->data, skb->head);
1501		n++;
1502		ne->flags = FP_FLAGS_EPI | fp->bufsize;
1503		ne->next  = virt_to_bus (NULL);
1504		ne->bsa   = virt_to_bus (skb->data);
1505		ne->aal_bufsize = fp->bufsize;
1506		ne->skb = skb;
1507		ne->fp = fp;
1508
1509		/*
1510		 * FIXME: following code encodes and decodes
1511		 * machine pointers (could be 64-bit) into a
1512		 * 32-bit register.
1513		 */
1514
1515		qe_tmp = read_fs (dev, FP_EA(fp->offset));
1516		fs_dprintk (FS_DEBUG_QUEUE, "link at %x\n", qe_tmp);
1517		if (qe_tmp) {
1518			qe = bus_to_virt ((long) qe_tmp);
1519			qe->next = virt_to_bus(ne);
1520			qe->flags &= ~FP_FLAGS_EPI;
1521		} else
1522			write_fs (dev, FP_SA(fp->offset), virt_to_bus(ne));
1523
1524		write_fs (dev, FP_EA(fp->offset), virt_to_bus (ne));
1525		fp->n++;   /* XXX Atomic_inc? */
1526		write_fs (dev, FP_CTU(fp->offset), 1);
1527	}
1528
1529	fs_dprintk (FS_DEBUG_QUEUE, "Added %d entries. \n", n);
1530}
1531
1532static void __devexit free_queue (struct fs_dev *dev, struct queue *txq)
1533{
1534	func_enter ();
1535
1536	write_fs (dev, Q_SA(txq->offset), 0);
1537	write_fs (dev, Q_EA(txq->offset), 0);
1538	write_fs (dev, Q_RP(txq->offset), 0);
1539	write_fs (dev, Q_WP(txq->offset), 0);
1540	/* Configuration ? */
1541
1542	fs_dprintk (FS_DEBUG_ALLOC, "Free queue: %p\n", txq->sa);
1543	kfree (txq->sa);
1544
1545	func_exit ();
1546}
1547
1548static void __devexit free_freepool (struct fs_dev *dev, struct freepool *fp)
1549{
1550	func_enter ();
1551
1552	write_fs (dev, FP_CNF(fp->offset), 0);
1553	write_fs (dev, FP_SA (fp->offset), 0);
1554	write_fs (dev, FP_EA (fp->offset), 0);
1555	write_fs (dev, FP_CNT(fp->offset), 0);
1556	write_fs (dev, FP_CTU(fp->offset), 0);
1557
1558	func_exit ();
1559}
1560
1561
1562
1563static irqreturn_t fs_irq (int irq, void *dev_id) 
1564{
1565	int i;
1566	u32 status;
1567	struct fs_dev *dev = dev_id;
1568
1569	status = read_fs (dev, ISR);
1570	if (!status)
1571		return IRQ_NONE;
1572
1573	func_enter ();
1574
1575#ifdef IRQ_RATE_LIMIT
1576	/* Aaargh! I'm ashamed. This costs more lines-of-code than the actual 
1577	   interrupt routine!. (Well, used to when I wrote that comment) -- REW */
1578	{
1579		static int lastjif;
1580		static int nintr=0;
1581    
1582		if (lastjif == jiffies) {
1583			if (++nintr > IRQ_RATE_LIMIT) {
1584				free_irq (dev->irq, dev_id);
1585				printk (KERN_ERR "fs: Too many interrupts. Turning off interrupt %d.\n", 
1586					dev->irq);
1587			}
1588		} else {
1589			lastjif = jiffies;
1590			nintr = 0;
1591		}
1592	}
1593#endif
1594	fs_dprintk (FS_DEBUG_QUEUE, "in intr: txq %d txrq %d\n", 
1595		    read_fs (dev, Q_EA (dev->hp_txq.offset)) -
1596		    read_fs (dev, Q_SA (dev->hp_txq.offset)),
1597		    read_fs (dev, Q_EA (dev->tx_relq.offset)) -
1598		    read_fs (dev, Q_SA (dev->tx_relq.offset)));
1599
1600	/* print the bits in the ISR register. */
1601	if (fs_debug & FS_DEBUG_IRQ) {
1602		/* The FS_DEBUG things are unnecessary here. But this way it is
1603		   clear for grep that these are debug prints. */
1604		fs_dprintk (FS_DEBUG_IRQ,  "IRQ status:");
1605		for (i=0;i<27;i++) 
1606			if (status & (1 << i)) 
1607				fs_dprintk (FS_DEBUG_IRQ, " %s", irq_bitname[i]);
1608		fs_dprintk (FS_DEBUG_IRQ, "\n");
1609	}
1610  
1611	if (status & ISR_RBRQ0_W) {
1612		fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (0)!!!!\n");
1613		process_incoming (dev, &dev->rx_rq[0]);
1614		/* items mentioned on RBRQ0 are from FP 0 or 1. */
1615		top_off_fp (dev, &dev->rx_fp[0], GFP_ATOMIC);
1616		top_off_fp (dev, &dev->rx_fp[1], GFP_ATOMIC);
1617	}
1618
1619	if (status & ISR_RBRQ1_W) {
1620		fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (1)!!!!\n");
1621		process_incoming (dev, &dev->rx_rq[1]);
1622		top_off_fp (dev, &dev->rx_fp[2], GFP_ATOMIC);
1623		top_off_fp (dev, &dev->rx_fp[3], GFP_ATOMIC);
1624	}
1625
1626	if (status & ISR_RBRQ2_W) {
1627		fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (2)!!!!\n");
1628		process_incoming (dev, &dev->rx_rq[2]);
1629		top_off_fp (dev, &dev->rx_fp[4], GFP_ATOMIC);
1630		top_off_fp (dev, &dev->rx_fp[5], GFP_ATOMIC);
1631	}
1632
1633	if (status & ISR_RBRQ3_W) {
1634		fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (3)!!!!\n");
1635		process_incoming (dev, &dev->rx_rq[3]);
1636		top_off_fp (dev, &dev->rx_fp[6], GFP_ATOMIC);
1637		top_off_fp (dev, &dev->rx_fp[7], GFP_ATOMIC);
1638	}
1639
1640	if (status & ISR_CSQ_W) {
1641		fs_dprintk (FS_DEBUG_IRQ, "Command executed ok!\n");
1642		process_return_queue (dev, &dev->st_q);
1643	}
1644
1645	if (status & ISR_TBRQ_W) {
1646		fs_dprintk (FS_DEBUG_IRQ, "Data tramsitted!\n");
1647		process_txdone_queue (dev, &dev->tx_relq);
1648	}
1649
1650	func_exit ();
1651	return IRQ_HANDLED;
1652}
1653
1654
1655#ifdef FS_POLL_FREQ
1656static void fs_poll (unsigned long data)
1657{
1658	struct fs_dev *dev = (struct fs_dev *) data;
1659  
1660	fs_irq (0, dev);
1661	dev->timer.expires = jiffies + FS_POLL_FREQ;
1662	add_timer (&dev->timer);
1663}
1664#endif
1665
1666static int __devinit fs_init (struct fs_dev *dev)
1667{
1668	struct pci_dev  *pci_dev;
1669	int isr, to;
1670	int i;
1671
1672	func_enter ();
1673	pci_dev = dev->pci_dev;
1674
1675	printk (KERN_INFO "found a FireStream %d card, base %16llx, irq%d.\n",
1676		IS_FS50(dev)?50:155,
1677		(unsigned long long)pci_resource_start(pci_dev, 0),
1678		dev->pci_dev->irq);
1679
1680	if (fs_debug & FS_DEBUG_INIT)
1681		my_hd ((unsigned char *) dev, sizeof (*dev));
1682
1683	undocumented_pci_fix (pci_dev);
1684
1685	dev->hw_base = pci_resource_start(pci_dev, 0);
1686
1687	dev->base = ioremap(dev->hw_base, 0x1000);
1688
1689	reset_chip (dev);
1690  
1691	write_fs (dev, SARMODE0, 0 
1692		  | (0 * SARMODE0_SHADEN) /* We don't use shadow registers. */
1693		  | (1 * SARMODE0_INTMODE_READCLEAR)
1694		  | (1 * SARMODE0_CWRE)
1695		  | (IS_FS50(dev) ? SARMODE0_PRPWT_FS50_5:
1696			  SARMODE0_PRPWT_FS155_3)
1697		  | (1 * SARMODE0_CALSUP_1)
1698		  | (IS_FS50(dev) ? (0
1699				   | SARMODE0_RXVCS_32
1700				   | SARMODE0_ABRVCS_32 
1701				   | SARMODE0_TXVCS_32):
1702		                  (0
1703				   | SARMODE0_RXVCS_1k
1704				   | SARMODE0_ABRVCS_1k 
1705				   | SARMODE0_TXVCS_1k)));
1706
1707	/* 10ms * 100 is 1 second. That should be enough, as AN3:9 says it takes
1708	   1ms. */
1709	to = 100;
1710	while (--to) {
1711		isr = read_fs (dev, ISR);
1712
1713		/* This bit is documented as "RESERVED" */
1714		if (isr & ISR_INIT_ERR) {
1715			printk (KERN_ERR "Error initializing the FS... \n");
1716			goto unmap;
1717		}
1718		if (isr & ISR_INIT) {
1719			fs_dprintk (FS_DEBUG_INIT, "Ha! Initialized OK!\n");
1720			break;
1721		}
1722
1723		/* Try again after 10ms. */
1724		msleep(10);
1725	}
1726
1727	if (!to) {
1728		printk (KERN_ERR "timeout initializing the FS... \n");
1729		goto unmap;
1730	}
1731
1732	/* XXX fix for fs155 */
1733	dev->channel_mask = 0x1f; 
1734	dev->channo = 0;
1735
1736	/* AN3: 10 */
1737	write_fs (dev, SARMODE1, 0 
1738		  | (fs_keystream * SARMODE1_DEFHEC) /* XXX PHY */
1739		  | ((loopback == 1) * SARMODE1_TSTLP) /* XXX Loopback mode enable... */
1740		  | (1 * SARMODE1_DCRM)
1741		  | (1 * SARMODE1_DCOAM)
1742		  | (0 * SARMODE1_OAMCRC)
1743		  | (0 * SARMODE1_DUMPE)
1744		  | (0 * SARMODE1_GPLEN) 
1745		  | (0 * SARMODE1_GNAM)
1746		  | (0 * SARMODE1_GVAS)
1747		  | (0 * SARMODE1_GPAS)
1748		  | (1 * SARMODE1_GPRI)
1749		  | (0 * SARMODE1_PMS)
1750		  | (0 * SARMODE1_GFCR)
1751		  | (1 * SARMODE1_HECM2)
1752		  | (1 * SARMODE1_HECM1)
1753		  | (1 * SARMODE1_HECM0)
1754		  | (1 << 12) /* That's what hang's driver does. Program to 0 */
1755		  | (0 * 0xff) /* XXX FS155 */);
1756
1757
1758	/* Cal prescale etc */
1759
1760	/* AN3: 11 */
1761	write_fs (dev, TMCONF, 0x0000000f);
1762	write_fs (dev, CALPRESCALE, 0x01010101 * num);
1763	write_fs (dev, 0x80, 0x000F00E4);
1764
1765	/* AN3: 12 */
1766	write_fs (dev, CELLOSCONF, 0
1767		  | (   0 * CELLOSCONF_CEN)
1768		  | (       CELLOSCONF_SC1)
1769		  | (0x80 * CELLOSCONF_COBS)
1770		  | (num  * CELLOSCONF_COPK)  /* Changed from 0xff to 0x5a */
1771		  | (num  * CELLOSCONF_COST));/* after a hint from Hang. 
1772					       * performance jumped 50->70... */
1773
1774	/* Magic value by Hang */
1775	write_fs (dev, CELLOSCONF_COST, 0x0B809191);
1776
1777	if (IS_FS50 (dev)) {
1778		write_fs (dev, RAS0, RAS0_DCD_XHLT);
1779		dev->atm_dev->ci_range.vpi_bits = 12;
1780		dev->atm_dev->ci_range.vci_bits = 16;
1781		dev->nchannels = FS50_NR_CHANNELS;
1782	} else {
1783		write_fs (dev, RAS0, RAS0_DCD_XHLT 
1784			  | (((1 << FS155_VPI_BITS) - 1) * RAS0_VPSEL)
1785			  | (((1 << FS155_VCI_BITS) - 1) * RAS0_VCSEL));
1786		/* We can chose the split arbitrarily. We might be able to 
1787		   support more. Whatever. This should do for now. */
1788		dev->atm_dev->ci_range.vpi_bits = FS155_VPI_BITS;
1789		dev->atm_dev->ci_range.vci_bits = FS155_VCI_BITS;
1790    
1791		/* Address bits we can't use should be compared to 0. */
1792		write_fs (dev, RAC, 0);
1793
1794		/* Manual (AN9, page 6) says ASF1=0 means compare Utopia address
1795		 * too.  I can't find ASF1 anywhere. Anyway, we AND with just the
1796		 * other bits, then compare with 0, which is exactly what we
1797		 * want. */
1798		write_fs (dev, RAM, (1 << (28 - FS155_VPI_BITS - FS155_VCI_BITS)) - 1);
1799		dev->nchannels = FS155_NR_CHANNELS;
1800	}
1801	dev->atm_vccs = kcalloc (dev->nchannels, sizeof (struct atm_vcc *),
1802				 GFP_KERNEL);
1803	fs_dprintk (FS_DEBUG_ALLOC, "Alloc atmvccs: %p(%Zd)\n",
1804		    dev->atm_vccs, dev->nchannels * sizeof (struct atm_vcc *));
1805
1806	if (!dev->atm_vccs) {
1807		printk (KERN_WARNING "Couldn't allocate memory for VCC buffers. Woops!\n");
1808		/* XXX Clean up..... */
1809		goto unmap;
1810	}
1811
1812	dev->tx_inuse = kzalloc (dev->nchannels / 8 /* bits/byte */ , GFP_KERNEL);
1813	fs_dprintk (FS_DEBUG_ALLOC, "Alloc tx_inuse: %p(%d)\n", 
1814		    dev->atm_vccs, dev->nchannels / 8);
1815
1816	if (!dev->tx_inuse) {
1817		printk (KERN_WARNING "Couldn't allocate memory for tx_inuse bits!\n");
1818		/* XXX Clean up..... */
1819		goto unmap;
1820	}
1821	/* -- RAS1 : FS155 and 50 differ. Default (0) should be OK for both */
1822	/* -- RAS2 : FS50 only: Default is OK. */
1823
1824	/* DMAMODE, default should be OK. -- REW */
1825	write_fs (dev, DMAMR, DMAMR_TX_MODE_FULL);
1826
1827	init_q (dev, &dev->hp_txq, TX_PQ(TXQ_HP), TXQ_NENTRIES, 0);
1828	init_q (dev, &dev->lp_txq, TX_PQ(TXQ_LP), TXQ_NENTRIES, 0);
1829	init_q (dev, &dev->tx_relq, TXB_RQ, TXQ_NENTRIES, 1);
1830	init_q (dev, &dev->st_q, ST_Q, TXQ_NENTRIES, 1);
1831
1832	for (i=0;i < FS_NR_FREE_POOLS;i++) {
1833		init_fp (dev, &dev->rx_fp[i], RXB_FP(i), 
1834			 rx_buf_sizes[i], rx_pool_sizes[i]);
1835		top_off_fp (dev, &dev->rx_fp[i], GFP_KERNEL);
1836	}
1837
1838
1839	for (i=0;i < FS_NR_RX_QUEUES;i++)
1840		init_q (dev, &dev->rx_rq[i], RXB_RQ(i), RXRQ_NENTRIES, 1);
1841
1842	dev->irq = pci_dev->irq;
1843	if (request_irq (dev->irq, fs_irq, IRQF_SHARED, "firestream", dev)) {
1844		printk (KERN_WARNING "couldn't get irq %d for firestream.\n", pci_dev->irq);
1845		/* XXX undo all previous stuff... */
1846		goto unmap;
1847	}
1848	fs_dprintk (FS_DEBUG_INIT, "Grabbed irq %d for dev at %p.\n", dev->irq, dev);
1849  
1850	/* We want to be notified of most things. Just the statistics count
1851	   overflows are not interesting */
1852	write_fs (dev, IMR, 0
1853		  | ISR_RBRQ0_W 
1854		  | ISR_RBRQ1_W 
1855		  | ISR_RBRQ2_W 
1856		  | ISR_RBRQ3_W 
1857		  | ISR_TBRQ_W
1858		  | ISR_CSQ_W);
1859
1860	write_fs (dev, SARMODE0, 0 
1861		  | (0 * SARMODE0_SHADEN) /* We don't use shadow registers. */
1862		  | (1 * SARMODE0_GINT)
1863		  | (1 * SARMODE0_INTMODE_READCLEAR)
1864		  | (0 * SARMODE0_CWRE)
1865		  | (IS_FS50(dev)?SARMODE0_PRPWT_FS50_5: 
1866		                  SARMODE0_PRPWT_FS155_3)
1867		  | (1 * SARMODE0_CALSUP_1)
1868		  | (IS_FS50 (dev)?(0
1869				    | SARMODE0_RXVCS_32
1870				    | SARMODE0_ABRVCS_32 
1871				    | SARMODE0_TXVCS_32):
1872		                   (0
1873				    | SARMODE0_RXVCS_1k
1874				    | SARMODE0_ABRVCS_1k 
1875				    | SARMODE0_TXVCS_1k))
1876		  | (1 * SARMODE0_RUN));
1877
1878	init_phy (dev, PHY_NTC_INIT);
1879
1880	if (loopback == 2) {
1881		write_phy (dev, 0x39, 0x000e);
1882	}
1883
1884#ifdef FS_POLL_FREQ
1885	init_timer (&dev->timer);
1886	dev->timer.data = (unsigned long) dev;
1887	dev->timer.function = fs_poll;
1888	dev->timer.expires = jiffies + FS_POLL_FREQ;
1889	add_timer (&dev->timer);
1890#endif
1891
1892	dev->atm_dev->dev_data = dev;
1893  
1894	func_exit ();
1895	return 0;
1896unmap:
1897	iounmap(dev->base);
1898	return 1;
1899}
1900
1901static int __devinit firestream_init_one (struct pci_dev *pci_dev,
1902				       const struct pci_device_id *ent) 
1903{
1904	struct atm_dev *atm_dev;
1905	struct fs_dev *fs_dev;
1906	
1907	if (pci_enable_device(pci_dev)) 
1908		goto err_out;
1909
1910	fs_dev = kzalloc (sizeof (struct fs_dev), GFP_KERNEL);
1911	fs_dprintk (FS_DEBUG_ALLOC, "Alloc fs-dev: %p(%Zd)\n",
1912		    fs_dev, sizeof (struct fs_dev));
1913	if (!fs_dev)
1914		goto err_out;
1915	atm_dev = atm_dev_register("fs", &pci_dev->dev, &ops, -1, NULL);
1916	if (!atm_dev)
1917		goto err_out_free_fs_dev;
1918  
1919	fs_dev->pci_dev = pci_dev;
1920	fs_dev->atm_dev = atm_dev;
1921	fs_dev->flags = ent->driver_data;
1922
1923	if (fs_init(fs_dev))
1924		goto err_out_free_atm_dev;
1925
1926	fs_dev->next = fs_boards;
1927	fs_boards = fs_dev;
1928	return 0;
1929
1930 err_out_free_atm_dev:
1931	atm_dev_deregister(atm_dev);
1932 err_out_free_fs_dev:
1933 	kfree(fs_dev);
1934 err_out:
1935	return -ENODEV;
1936}
1937
1938static void __devexit firestream_remove_one (struct pci_dev *pdev)
1939{
1940	int i;
1941	struct fs_dev *dev, *nxtdev;
1942	struct fs_vcc *vcc;
1943	struct FS_BPENTRY *fp, *nxt;
1944  
1945	func_enter ();
1946
1947#if 0
1948	printk ("hptxq:\n");
1949	for (i=0;i<60;i++) {
1950		printk ("%d: %08x %08x %08x %08x \n", 
1951			i, pq[qp].cmd, pq[qp].p0, pq[qp].p1, pq[qp].p2);
1952		qp++;
1953		if (qp >= 60) qp = 0;
1954	}
1955
1956	printk ("descriptors:\n");
1957	for (i=0;i<60;i++) {
1958		printk ("%d: %p: %08x %08x %p %p\n", 
1959			i, da[qd], dq[qd].flags, dq[qd].bsa, dq[qd].skb, dq[qd].dev);
1960		qd++;
1961		if (qd >= 60) qd = 0;
1962	}
1963#endif
1964
1965	for (dev = fs_boards;dev != NULL;dev=nxtdev) {
1966		fs_dprintk (FS_DEBUG_CLEANUP, "Releasing resources for dev at %p.\n", dev);
1967
1968		/* XXX Hit all the tx channels too! */
1969
1970		for (i=0;i < dev->nchannels;i++) {
1971			if (dev->atm_vccs[i]) {
1972				vcc = FS_VCC (dev->atm_vccs[i]);
1973				submit_command (dev,  &dev->hp_txq,
1974						QE_CMD_TX_PURGE_INH | QE_CMD_IMM_INQ | vcc->channo, 0,0,0);
1975				submit_command (dev,  &dev->hp_txq,
1976						QE_CMD_RX_PURGE_INH | QE_CMD_IMM_INQ | vcc->channo, 0,0,0);
1977
1978			}
1979		}
1980
1981		/* XXX Wait a while for the chip to release all buffers. */
1982
1983		for (i=0;i < FS_NR_FREE_POOLS;i++) {
1984			for (fp=bus_to_virt (read_fs (dev, FP_SA(dev->rx_fp[i].offset)));
1985			     !(fp->flags & FP_FLAGS_EPI);fp = nxt) {
1986				fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", fp->skb);
1987				dev_kfree_skb_any (fp->skb);
1988				nxt = bus_to_virt (fp->next);
1989				fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", fp);
1990				kfree (fp);
1991			}
1992			fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", fp->skb);
1993			dev_kfree_skb_any (fp->skb);
1994			fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", fp);
1995			kfree (fp);
1996		}
1997
1998		/* Hang the chip in "reset", prevent it clobbering memory that is
1999		   no longer ours. */
2000		reset_chip (dev);
2001
2002		fs_dprintk (FS_DEBUG_CLEANUP, "Freeing irq%d.\n", dev->irq);
2003		free_irq (dev->irq, dev);
2004		del_timer (&dev->timer);
2005
2006		atm_dev_deregister(dev->atm_dev);
2007		free_queue (dev, &dev->hp_txq);
2008		free_queue (dev, &dev->lp_txq);
2009		free_queue (dev, &dev->tx_relq);
2010		free_queue (dev, &dev->st_q);
2011
2012		fs_dprintk (FS_DEBUG_ALLOC, "Free atmvccs: %p\n", dev->atm_vccs);
2013		kfree (dev->atm_vccs);
2014
2015		for (i=0;i< FS_NR_FREE_POOLS;i++)
2016			free_freepool (dev, &dev->rx_fp[i]);
2017    
2018		for (i=0;i < FS_NR_RX_QUEUES;i++)
2019			free_queue (dev, &dev->rx_rq[i]);
2020
2021		iounmap(dev->base);
2022		fs_dprintk (FS_DEBUG_ALLOC, "Free fs-dev: %p\n", dev);
2023		nxtdev = dev->next;
2024		kfree (dev);
2025	}
2026
2027	func_exit ();
2028}
2029
2030static struct pci_device_id firestream_pci_tbl[] = {
2031	{ PCI_VDEVICE(FUJITSU_ME, PCI_DEVICE_ID_FUJITSU_FS50), FS_IS50},
2032	{ PCI_VDEVICE(FUJITSU_ME, PCI_DEVICE_ID_FUJITSU_FS155), FS_IS155},
2033	{ 0, }
2034};
2035
2036MODULE_DEVICE_TABLE(pci, firestream_pci_tbl);
2037
2038static struct pci_driver firestream_driver = {
2039	.name		= "firestream",
2040	.id_table	= firestream_pci_tbl,
2041	.probe		= firestream_init_one,
2042	.remove		= __devexit_p(firestream_remove_one),
2043};
2044
2045static int __init firestream_init_module (void)
2046{
2047	int error;
2048
2049	func_enter ();
2050	error = pci_register_driver(&firestream_driver);
2051	func_exit ();
2052	return error;
2053}
2054
2055static void __exit firestream_cleanup_module(void)
2056{
2057	pci_unregister_driver(&firestream_driver);
2058}
2059
2060module_init(firestream_init_module);
2061module_exit(firestream_cleanup_module);
2062
2063MODULE_LICENSE("GPL");
2064
2065
2066