2 /* drivers/atm/firestream.c - FireStream 155 (MB86697) and
3 * FireStream 50 (MB86695) device driver
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
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.
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.
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
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.
31 #include <linux/module.h>
32 #include <linux/sched.h>
33 #include <linux/kernel.h>
35 #include <linux/pci.h>
36 #include <linux/errno.h>
37 #include <linux/atm.h>
38 #include <linux/atmdev.h>
39 #include <linux/sonet.h>
40 #include <linux/skbuff.h>
41 #include <linux/netdevice.h>
42 #include <linux/delay.h>
43 #include <linux/ioport.h> /* for request_region */
44 #include <linux/uio.h>
45 #include <linux/init.h>
46 #include <linux/capability.h>
47 #include <linux/bitops.h>
48 #include <asm/byteorder.h>
49 #include <asm/system.h>
50 #include <asm/string.h>
52 #include <asm/atomic.h>
53 #include <asm/uaccess.h>
54 #include <linux/wait.h>
56 #include "firestream.h"
58 static int loopback = 0;
61 /* According to measurements (but they look suspicious to me!) done in
62 * '97, 37% of the packets are one cell in size. So it pays to have
63 * buffers allocated at that size. A large jump in percentage of
64 * packets occurs at packets around 536 bytes in length. So it also
65 * pays to have those pre-allocated. Unfortunately, we can't fully
66 * take advantage of this as the majority of the packets is likely to
67 * be TCP/IP (As where obviously the measurement comes from) There the
68 * link would be opened with say a 1500 byte MTU, and we can't handle
69 * smaller buffers more efficiently than the larger ones. -- REW
72 /* Due to the way Linux memory management works, specifying "576" as
73 * an allocation size here isn't going to help. They are allocated
74 * from 1024-byte regions anyway. With the size of the sk_buffs (quite
75 * large), it doesn't pay to allocate the smallest size (64) -- REW */
77 /* This is all guesswork. Hard numbers to back this up or disprove this,
78 * are appreciated. -- REW */
80 /* The last entry should be about 64k. However, the "buffer size" is
81 * passed to the chip in a 16 bit field. I don't know how "65536"
82 * would be interpreted. -- REW */
84 #define NP FS_NR_FREE_POOLS
85 static int rx_buf_sizes[NP] = {128, 256, 512, 1024, 2048, 4096, 16384, 65520};
86 /* log2: 7 8 9 10 11 12 14 16 */
89 static int rx_pool_sizes[NP] = {1024, 1024, 512, 256, 128, 64, 32, 32};
92 static int rx_pool_sizes[NP] = {128, 128, 128, 64, 64, 64, 32, 32};
94 /* log2: 10 10 9 8 7 6 5 5 */
95 /* sumlog2: 17 18 18 18 18 18 19 21 */
96 /* mem allocated: 128k 256k 256k 256k 256k 256k 512k 2M */
97 /* tot mem: almost 4M */
99 /* NP is shorter, so that it fits on a single line. */
103 /* Small hardware gotcha:
105 The FS50 CAM (VP/VC match registers) always take the lowest channel
106 number that matches. This is not a problem.
108 However, they also ignore whether the channel is enabled or
109 not. This means that if you allocate channel 0 to 1.2 and then
110 channel 1 to 0.0, then disabeling channel 0 and writing 0 to the
111 match channel for channel 0 will "steal" the traffic from channel
112 1, even if you correctly disable channel 0.
116 - When disabling channels, write an invalid VP/VC value to the
117 match register. (We use 0xffffffff, which in the worst case
118 matches VP/VC = <maxVP>/<maxVC>, but I expect it not to match
119 anything as some "when not in use, program to 0" bits are now
122 - Don't initialize the match registers to 0, as 0.0 is a valid
127 /* Optimization hints and tips.
129 The FireStream chips are very capable of reducing the amount of
130 "interrupt-traffic" for the CPU. This driver requests an interrupt on EVERY
131 action. You could try to minimize this a bit.
133 Besides that, the userspace->kernel copy and the PCI bus are the
134 performance limiting issues for this driver.
136 You could queue up a bunch of outgoing packets without telling the
137 FireStream. I'm not sure that's going to win you much though. The
138 Linux layer won't tell us in advance when it's not going to give us
139 any more packets in a while. So this is tricky to implement right without
140 introducing extra delays.
148 /* The strings that define what the RX queue entry is all about. */
149 /* Fujitsu: Please tell me which ones can have a pointer to a
150 freepool descriptor! */
151 static char *res_strings[] = {
152 "RX OK: streaming not EOP",
153 "RX OK: streaming EOP",
154 "RX OK: Single buffer packet",
155 "RX OK: packet mode",
156 "RX OK: F4 OAM (end to end)",
157 "RX OK: F4 OAM (Segment)",
158 "RX OK: F5 OAM (end to end)",
159 "RX OK: F5 OAM (Segment)",
161 "RX OK: TRANSP cell",
162 "RX OK: TRANSPC cell",
169 "reassemby abort: AAL5 abort",
171 "packet ageing timeout",
172 "channel ageing timeout",
173 "calculated lenght error",
174 "programmed lenght limit error",
176 "oam transp or transpc crc10 error",
183 "reassembly abort: no buffers",
184 "receive buffer overflow",
186 "receive buffer full",
187 "low priority discard - no receive descriptor",
188 "low priority discard - missing end of packet",
214 static char *irq_bitname[] = {
246 #define PHY_CLEARALL -2
248 struct reginit_item {
253 static struct reginit_item PHY_NTC_INIT[] __devinitdata = {
254 { PHY_CLEARALL, 0x40 },
260 { 0x39, 0x0006 }, /* changed here to make loopback */
264 { PHY_EOF, 0}, /* -1 signals end of list */
268 /* Safetyfeature: If the card interrupts more than this number of times
269 in a jiffy (1/100th of a second) then we just disable the interrupt and
270 print a message. This prevents the system from hanging.
272 150000 packets per second is close to the limit a PC is going to have
273 anyway. We therefore have to disable this for production. -- REW */
274 #undef IRQ_RATE_LIMIT // 100
276 /* Interrupts work now. Unlike serial cards, ATM cards don't work all
277 that great without interrupts. -- REW */
278 #undef FS_POLL_FREQ // 100
281 This driver can spew a whole lot of debugging output at you. If you
282 need maximum performance, you should disable the DEBUG define. To
283 aid in debugging in the field, I'm leaving the compile-time debug
284 features enabled, and disable them "runtime". That allows me to
285 instruct people with problems to enable debugging without requiring
286 them to recompile... -- REW
291 #define fs_dprintk(f, str...) if (fs_debug & f) printk (str)
293 #define fs_dprintk(f, str...) /* nothing */
297 static int fs_keystream = 0;
300 /* I didn't forget to set this to zero before shipping. Hit me with a stick
301 if you get this with the debug default not set to zero again. -- REW */
302 static int fs_debug = 0;
309 module_param(fs_debug, int, 0644);
311 module_param(loopback, int, 0);
312 module_param(num, int, 0);
313 module_param(fs_keystream, int, 0);
314 /* XXX Add rx_buf_sizes, and rx_pool_sizes As per request Amar. -- REW */
318 #define FS_DEBUG_FLOW 0x00000001
319 #define FS_DEBUG_OPEN 0x00000002
320 #define FS_DEBUG_QUEUE 0x00000004
321 #define FS_DEBUG_IRQ 0x00000008
322 #define FS_DEBUG_INIT 0x00000010
323 #define FS_DEBUG_SEND 0x00000020
324 #define FS_DEBUG_PHY 0x00000040
325 #define FS_DEBUG_CLEANUP 0x00000080
326 #define FS_DEBUG_QOS 0x00000100
327 #define FS_DEBUG_TXQ 0x00000200
328 #define FS_DEBUG_ALLOC 0x00000400
329 #define FS_DEBUG_TXMEM 0x00000800
330 #define FS_DEBUG_QSIZE 0x00001000
333 #define func_enter() fs_dprintk (FS_DEBUG_FLOW, "fs: enter %s\n", __FUNCTION__)
334 #define func_exit() fs_dprintk (FS_DEBUG_FLOW, "fs: exit %s\n", __FUNCTION__)
337 static struct fs_dev *fs_boards = NULL;
341 static void my_hd (void *addr, int len)
344 unsigned char *ptr = addr;
348 for (j=0;j < ((len < 16)?len:16);j++) {
349 printk ("%02x %s", ptr[j], (j==7)?" ":"");
352 printk (" %s", (j==7)?" ":"");
354 for (j=0;j < ((len < 16)?len:16);j++) {
356 printk ("%c", (ch < 0x20)?'.':((ch > 0x7f)?'.':ch));
364 static void my_hd (void *addr, int len){}
367 /********** free an skb (as per ATM device driver documentation) **********/
369 /* Hmm. If this is ATM specific, why isn't there an ATM routine for this?
370 * I copied it over from the ambassador driver. -- REW */
372 static inline void fs_kfree_skb (struct sk_buff * skb)
374 if (ATM_SKB(skb)->vcc->pop)
375 ATM_SKB(skb)->vcc->pop (ATM_SKB(skb)->vcc, skb);
377 dev_kfree_skb_any (skb);
383 /* It seems the ATM forum recommends this horribly complicated 16bit
384 * floating point format. Turns out the Ambassador uses the exact same
385 * encoding. I just copied it over. If Mitch agrees, I'll move it over
386 * to the atm_misc file or something like that. (and remove it from
387 * here and the ambassador driver) -- REW
390 /* The good thing about this format is that it is monotonic. So,
391 a conversion routine need not be very complicated. To be able to
392 round "nearest" we need to take along a few extra bits. Lets
393 put these after 16 bits, so that we can just return the top 16
394 bits of the 32bit number as the result:
396 int mr (unsigned int rate, int r)
399 static int round[4]={0, 0, 0xffff, 0x8000};
401 while (rate & 0xfc000000) {
405 while (! (rate & 0xfe000000)) {
410 // Now the mantissa is in positions bit 16-25. Excepf for the "hidden 1" that's in bit 26.
412 // Next add in the exponent
414 // And perform the rounding:
415 return (rate + round[r]) >> 16;
418 14 lines-of-code. Compare that with the 120 that the Ambassador
419 guys needed. (would be 8 lines shorter if I'd try to really reduce
422 int mr (unsigned int rate, int r)
425 static int round[4]={0, 0, 0xffff, 0x8000};
427 for (; rate & 0xfc000000 ;rate >>= 1, e++);
428 for (;!(rate & 0xfe000000);rate <<= 1, e--);
429 return ((rate & ~0x02000000) | (e << (16+9)) + round[r]) >> 16;
432 Exercise for the reader: Remove one more line-of-code, without
433 cheating. (Just joining two lines is cheating). (I know it's
434 possible, don't think you've beat me if you found it... If you
435 manage to lose two lines or more, keep me updated! ;-)
442 #define ROUND_NEAREST 3
443 /********** make rate (not quite as much fun as Horizon) **********/
445 static unsigned int make_rate (unsigned int rate, int r,
446 u16 * bits, unsigned int * actual)
448 unsigned char exp = -1; /* hush gcc */
449 unsigned int man = -1; /* hush gcc */
451 fs_dprintk (FS_DEBUG_QOS, "make_rate %u", rate);
453 /* rates in cells per second, ITU format (nasty 16-bit floating-point)
454 given 5-bit e and 9-bit m:
455 rate = EITHER (1+m/2^9)*2^e OR 0
456 bits = EITHER 1<<14 | e<<9 | m OR 0
457 (bit 15 is "reserved", bit 14 "non-zero")
458 smallest rate is 0 (special representation)
459 largest rate is (1+511/512)*2^31 = 4290772992 (< 2^32-1)
460 smallest non-zero rate is (1+0/512)*2^0 = 1 (> 0)
462 find position of top bit, this gives e
463 remove top bit and shift (rounding if feeling clever) by 9-e
465 /* Ambassador ucode bug: please don't set bit 14! so 0 rate not
466 representable. // This should move into the ambassador driver
467 when properly merged. -- REW */
469 if (rate > 0xffc00000U) {
470 /* larger than largest representable rate */
480 /* representable rate */
485 /* invariant: rate = man*2^(exp-31) */
486 while (!(man & (1<<31))) {
491 /* man has top bit set
492 rate = (2^31+(man-2^31))*2^(exp-31)
493 rate = (1+(man-2^31)/2^31)*2^exp
496 man &= 0xffffffffU; /* a nop on 32-bit systems */
497 /* rate = (1+man/2^32)*2^exp
499 exp is in the range 0 to 31, man is in the range 0 to 2^32-1
500 time to lose significance... we want m in the range 0 to 2^9-1
501 rounding presents a minor problem... we first decide which way
502 we are rounding (based on given rounding direction and possibly
503 the bits of the mantissa that are to be discarded).
513 /* check all bits that we are discarding */
515 man = (man>>(32-9)) + 1;
517 /* no need to check for round up outside of range */
526 case ROUND_NEAREST: {
527 /* check msb that we are discarding */
528 if (man & (1<<(32-9-1))) {
529 man = (man>>(32-9)) + 1;
531 /* no need to check for round up outside of range */
543 /* zero rate - not representable */
545 if (r == ROUND_DOWN) {
553 fs_dprintk (FS_DEBUG_QOS, "rate: man=%u, exp=%hu", man, exp);
556 *bits = /* (1<<14) | */ (exp<<9) | man;
560 ? (1 << exp) + (man << (exp-9))
561 : (1 << exp) + ((man + (1<<(9-exp-1))) >> (9-exp));
569 /* FireStream access routines */
570 /* For DEEP-DOWN debugging these can be rigged to intercept accesses to
571 certain registers or to just log all accesses. */
573 static inline void write_fs (struct fs_dev *dev, int offset, u32 val)
575 writel (val, dev->base + offset);
579 static inline u32 read_fs (struct fs_dev *dev, int offset)
581 return readl (dev->base + offset);
586 static inline struct FS_QENTRY *get_qentry (struct fs_dev *dev, struct queue *q)
588 return bus_to_virt (read_fs (dev, Q_WP(q->offset)) & Q_ADDR_MASK);
592 static void submit_qentry (struct fs_dev *dev, struct queue *q, struct FS_QENTRY *qe)
595 struct FS_QENTRY *cqe;
597 /* XXX Sanity check: the write pointer can be checked to be
598 still the same as the value passed as qe... -- REW */
600 while ((wp = read_fs (dev, Q_WP (q->offset))) & Q_FULL) {
601 fs_dprintk (FS_DEBUG_TXQ, "Found queue at %x full. Waiting.\n",
607 cqe = bus_to_virt (wp);
609 fs_dprintk (FS_DEBUG_TXQ, "q mismatch! %p %p\n", qe, cqe);
612 write_fs (dev, Q_WP(q->offset), Q_INCWRAP);
619 rp = read_fs (dev, Q_RP(q->offset));
620 wp = read_fs (dev, Q_WP(q->offset));
621 fs_dprintk (FS_DEBUG_TXQ, "q at %d: %x-%x: %x entries.\n",
622 q->offset, rp, wp, wp-rp);
628 static struct FS_QENTRY pq[60];
631 static struct FS_BPENTRY dq[60];
636 static void submit_queue (struct fs_dev *dev, struct queue *q,
637 u32 cmd, u32 p1, u32 p2, u32 p3)
639 struct FS_QENTRY *qe;
641 qe = get_qentry (dev, q);
646 submit_qentry (dev, q, qe);
654 if (qp >= 60) qp = 0;
658 /* Test the "other" way one day... -- REW */
660 #define submit_command submit_queue
663 static void submit_command (struct fs_dev *dev, struct queue *q,
664 u32 cmd, u32 p1, u32 p2, u32 p3)
666 write_fs (dev, CMDR0, cmd);
667 write_fs (dev, CMDR1, p1);
668 write_fs (dev, CMDR2, p2);
669 write_fs (dev, CMDR3, p3);
675 static void process_return_queue (struct fs_dev *dev, struct queue *q)
678 struct FS_QENTRY *qe;
681 while (!((rq = read_fs (dev, Q_RP(q->offset))) & Q_EMPTY)) {
682 fs_dprintk (FS_DEBUG_QUEUE, "reaping return queue entry at %lx\n", rq);
683 qe = bus_to_virt (rq);
685 fs_dprintk (FS_DEBUG_QUEUE, "queue entry: %08x %08x %08x %08x. (%d)\n",
686 qe->cmd, qe->p0, qe->p1, qe->p2, STATUS_CODE (qe));
688 switch (STATUS_CODE (qe)) {
690 tc = bus_to_virt (qe->p0);
691 fs_dprintk (FS_DEBUG_ALLOC, "Free tc: %p\n", tc);
696 write_fs (dev, Q_RP(q->offset), Q_INCWRAP);
701 static void process_txdone_queue (struct fs_dev *dev, struct queue *q)
705 struct FS_QENTRY *qe;
707 struct FS_BPENTRY *td;
709 while (!((rq = read_fs (dev, Q_RP(q->offset))) & Q_EMPTY)) {
710 fs_dprintk (FS_DEBUG_QUEUE, "reaping txdone entry at %lx\n", rq);
711 qe = bus_to_virt (rq);
713 fs_dprintk (FS_DEBUG_QUEUE, "queue entry: %08x %08x %08x %08x: %d\n",
714 qe->cmd, qe->p0, qe->p1, qe->p2, STATUS_CODE (qe));
716 if (STATUS_CODE (qe) != 2)
717 fs_dprintk (FS_DEBUG_TXMEM, "queue entry: %08x %08x %08x %08x: %d\n",
718 qe->cmd, qe->p0, qe->p1, qe->p2, STATUS_CODE (qe));
721 switch (STATUS_CODE (qe)) {
722 case 0x01: /* This is for AAL0 where we put the chip in streaming mode */
725 /* Process a real txdone entry. */
728 printk (KERN_WARNING "td not aligned: %ld\n", tmp);
730 td = bus_to_virt (tmp);
732 fs_dprintk (FS_DEBUG_QUEUE, "Pool entry: %08x %08x %08x %08x %p.\n",
733 td->flags, td->next, td->bsa, td->aal_bufsize, td->skb );
736 if (skb == FS_VCC (ATM_SKB(skb)->vcc)->last_skb) {
737 wake_up_interruptible (& FS_VCC (ATM_SKB(skb)->vcc)->close_wait);
738 FS_VCC (ATM_SKB(skb)->vcc)->last_skb = NULL;
746 fs_dprintk (FS_DEBUG_QSIZE, "[%d]", td->dev->ntxpckts);
750 atomic_inc(&ATM_SKB(skb)->vcc->stats->tx);
752 fs_dprintk (FS_DEBUG_TXMEM, "i");
753 fs_dprintk (FS_DEBUG_ALLOC, "Free t-skb: %p\n", skb);
756 fs_dprintk (FS_DEBUG_ALLOC, "Free trans-d: %p\n", td);
757 memset (td, 0x12, sizeof (struct FS_BPENTRY));
761 /* Here we get the tx purge inhibit command ... */
762 /* Action, I believe, is "don't do anything". -- REW */
766 write_fs (dev, Q_RP(q->offset), Q_INCWRAP);
771 static void process_incoming (struct fs_dev *dev, struct queue *q)
774 struct FS_QENTRY *qe;
775 struct FS_BPENTRY *pe;
778 struct atm_vcc *atm_vcc;
780 while (!((rq = read_fs (dev, Q_RP(q->offset))) & Q_EMPTY)) {
781 fs_dprintk (FS_DEBUG_QUEUE, "reaping incoming queue entry at %lx\n", rq);
782 qe = bus_to_virt (rq);
784 fs_dprintk (FS_DEBUG_QUEUE, "queue entry: %08x %08x %08x %08x. ",
785 qe->cmd, qe->p0, qe->p1, qe->p2);
787 fs_dprintk (FS_DEBUG_QUEUE, "-> %x: %s\n",
789 res_strings[STATUS_CODE(qe)]);
791 pe = bus_to_virt (qe->p0);
792 fs_dprintk (FS_DEBUG_QUEUE, "Pool entry: %08x %08x %08x %08x %p %p.\n",
793 pe->flags, pe->next, pe->bsa, pe->aal_bufsize,
796 channo = qe->cmd & 0xffff;
798 if (channo < dev->nchannels)
799 atm_vcc = dev->atm_vccs[channo];
803 /* Single buffer packet */
804 switch (STATUS_CODE (qe)) {
806 /* Fall through for streaming mode */
807 case 0x2:/* Packet received OK.... */
812 fs_dprintk (FS_DEBUG_QUEUE, "Got skb: %p\n", skb);
813 if (FS_DEBUG_QUEUE & fs_debug) my_hd (bus_to_virt (pe->bsa), 0x20);
815 skb_put (skb, qe->p1 & 0xffff);
816 ATM_SKB(skb)->vcc = atm_vcc;
817 atomic_inc(&atm_vcc->stats->rx);
818 __net_timestamp(skb);
819 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p (pushed)\n", skb);
820 atm_vcc->push (atm_vcc, skb);
821 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", pe);
824 printk (KERN_ERR "Got a receive on a non-open channel %d.\n", channo);
827 case 0x17:/* AAL 5 CRC32 error. IFF the length field is nonzero, a buffer
828 has been consumed and needs to be processed. -- REW */
829 if (qe->p1 & 0xffff) {
830 pe = bus_to_virt (qe->p0);
832 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", pe->skb);
833 dev_kfree_skb_any (pe->skb);
834 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", pe);
838 atomic_inc(&atm_vcc->stats->rx_drop);
840 case 0x1f: /* Reassembly abort: no buffers. */
841 /* Silently increment error counter. */
843 atomic_inc(&atm_vcc->stats->rx_drop);
845 default: /* Hmm. Haven't written the code to handle the others yet... -- REW */
846 printk (KERN_WARNING "Don't know what to do with RX status %x: %s.\n",
847 STATUS_CODE(qe), res_strings[STATUS_CODE (qe)]);
849 write_fs (dev, Q_RP(q->offset), Q_INCWRAP);
855 #define DO_DIRECTION(tp) ((tp)->traffic_class != ATM_NONE)
857 static int fs_open(struct atm_vcc *atm_vcc)
861 struct fs_transmit_config *tc;
862 struct atm_trafprm * txtp;
863 struct atm_trafprm * rxtp;
864 /* struct fs_receive_config *rc;*/
865 /* struct FS_QENTRY *qe; */
870 short vpi = atm_vcc->vpi;
871 int vci = atm_vcc->vci;
875 dev = FS_DEV(atm_vcc->dev);
876 fs_dprintk (FS_DEBUG_OPEN, "fs: open on dev: %p, vcc at %p\n",
879 if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
880 set_bit(ATM_VF_ADDR, &atm_vcc->flags);
882 if ((atm_vcc->qos.aal != ATM_AAL5) &&
883 (atm_vcc->qos.aal != ATM_AAL2))
884 return -EINVAL; /* XXX AAL0 */
886 fs_dprintk (FS_DEBUG_OPEN, "fs: (itf %d): open %d.%d\n",
887 atm_vcc->dev->number, atm_vcc->vpi, atm_vcc->vci);
889 /* XXX handle qos parameters (rate limiting) ? */
891 vcc = kmalloc(sizeof(struct fs_vcc), GFP_KERNEL);
892 fs_dprintk (FS_DEBUG_ALLOC, "Alloc VCC: %p(%Zd)\n", vcc, sizeof(struct fs_vcc));
894 clear_bit(ATM_VF_ADDR, &atm_vcc->flags);
898 atm_vcc->dev_data = vcc;
899 vcc->last_skb = NULL;
901 init_waitqueue_head (&vcc->close_wait);
903 txtp = &atm_vcc->qos.txtp;
904 rxtp = &atm_vcc->qos.rxtp;
906 if (!test_bit(ATM_VF_PARTIAL, &atm_vcc->flags)) {
908 /* Increment the channel numer: take a free one next time. */
909 for (to=33;to;to--, dev->channo++) {
910 /* We only have 32 channels */
911 if (dev->channo >= 32)
913 /* If we need to do RX, AND the RX is inuse, try the next */
914 if (DO_DIRECTION(rxtp) && dev->atm_vccs[dev->channo])
916 /* If we need to do TX, AND the TX is inuse, try the next */
917 if (DO_DIRECTION(txtp) && test_bit (dev->channo, dev->tx_inuse))
919 /* Ok, both are free! (or not needed) */
923 printk ("No more free channels for FS50..\n");
926 vcc->channo = dev->channo;
927 dev->channo &= dev->channel_mask;
930 vcc->channo = (vpi << FS155_VCI_BITS) | (vci);
931 if (((DO_DIRECTION(rxtp) && dev->atm_vccs[vcc->channo])) ||
932 ( DO_DIRECTION(txtp) && test_bit (vcc->channo, dev->tx_inuse))) {
933 printk ("Channel is in use for FS155.\n");
937 fs_dprintk (FS_DEBUG_OPEN, "OK. Allocated channel %x(%d).\n",
938 vcc->channo, vcc->channo);
941 if (DO_DIRECTION (txtp)) {
942 tc = kmalloc (sizeof (struct fs_transmit_config), GFP_KERNEL);
943 fs_dprintk (FS_DEBUG_ALLOC, "Alloc tc: %p(%Zd)\n",
944 tc, sizeof (struct fs_transmit_config));
946 fs_dprintk (FS_DEBUG_OPEN, "fs: can't alloc transmit_config.\n");
950 /* Allocate the "open" entry from the high priority txq. This makes
951 it most likely that the chip will notice it. It also prevents us
952 from having to wait for completion. On the other hand, we may
953 need to wait for completion anyway, to see if it completed
956 switch (atm_vcc->qos.aal) {
960 | TC_FLAGS_TRANSPARENT_PAYLOAD
963 | TC_FLAGS_TYPE_UBR /* XXX Change to VBR -- PVDL */
969 | TC_FLAGS_PACKET /* ??? */
974 printk ("Unknown aal: %d\n", atm_vcc->qos.aal);
977 /* Docs are vague about this atm_hdr field. By the way, the FS
978 * chip makes odd errors if lower bits are set.... -- REW */
979 tc->atm_hdr = (vpi << 20) | (vci << 4);
981 int pcr = atm_pcr_goal (txtp);
983 fs_dprintk (FS_DEBUG_OPEN, "pcr = %d.\n", pcr);
985 /* XXX Hmm. officially we're only allowed to do this if rounding
986 is round_down -- REW */
988 if (pcr > 51840000/53/8) pcr = 51840000/53/8;
990 if (pcr > 155520000/53/8) pcr = 155520000/53/8;
994 tmc0 = IS_FS50(dev)?0x61BE:0x64c9; /* Just copied over the bits from Fujitsu -- REW */
1003 error = make_rate (pcr, r, &tmc0, NULL);
1005 fs_dprintk (FS_DEBUG_OPEN, "pcr = %d.\n", pcr);
1008 tc->TMC[0] = tmc0 | 0x4000;
1009 tc->TMC[1] = 0; /* Unused */
1010 tc->TMC[2] = 0; /* Unused */
1011 tc->TMC[3] = 0; /* Unused */
1013 tc->spec = 0; /* UTOPIA address, UDF, HEC: Unused -> 0 */
1014 tc->rtag[0] = 0; /* What should I do with routing tags???
1015 -- Not used -- AS -- Thanks -- REW*/
1019 if (fs_debug & FS_DEBUG_OPEN) {
1020 fs_dprintk (FS_DEBUG_OPEN, "TX config record:\n");
1021 my_hd (tc, sizeof (*tc));
1024 /* We now use the "submit_command" function to submit commands to
1025 the firestream. There is a define up near the definition of
1026 that routine that switches this routine between immediate write
1027 to the immediate comamnd registers and queuing the commands in
1028 the HPTXQ for execution. This last technique might be more
1029 efficient if we know we're going to submit a whole lot of
1030 commands in one go, but this driver is not setup to be able to
1031 use such a construct. So it probably doen't matter much right
1034 /* The command is IMMediate and INQueue. The parameters are out-of-line.. */
1035 submit_command (dev, &dev->hp_txq,
1036 QE_CMD_CONFIG_TX | QE_CMD_IMM_INQ | vcc->channo,
1037 virt_to_bus (tc), 0, 0);
1039 submit_command (dev, &dev->hp_txq,
1040 QE_CMD_TX_EN | QE_CMD_IMM_INQ | vcc->channo,
1042 set_bit (vcc->channo, dev->tx_inuse);
1045 if (DO_DIRECTION (rxtp)) {
1046 dev->atm_vccs[vcc->channo] = atm_vcc;
1048 for (bfp = 0;bfp < FS_NR_FREE_POOLS; bfp++)
1049 if (atm_vcc->qos.rxtp.max_sdu <= dev->rx_fp[bfp].bufsize) break;
1050 if (bfp >= FS_NR_FREE_POOLS) {
1051 fs_dprintk (FS_DEBUG_OPEN, "No free pool fits sdu: %d.\n",
1052 atm_vcc->qos.rxtp.max_sdu);
1053 /* XXX Cleanup? -- Would just calling fs_close work??? -- REW */
1055 /* XXX clear tx inuse. Close TX part? */
1056 dev->atm_vccs[vcc->channo] = NULL;
1061 switch (atm_vcc->qos.aal) {
1064 submit_command (dev, &dev->hp_txq,
1065 QE_CMD_CONFIG_RX | QE_CMD_IMM_INQ | vcc->channo,
1067 RC_FLAGS_BFPS_BFP * bfp |
1068 RC_FLAGS_RXBM_PSB, 0, 0);
1071 submit_command (dev, &dev->hp_txq,
1072 QE_CMD_CONFIG_RX | QE_CMD_IMM_INQ | vcc->channo,
1074 RC_FLAGS_BFPS_BFP * bfp |
1075 RC_FLAGS_RXBM_PSB, 0, 0);
1078 if (IS_FS50 (dev)) {
1079 submit_command (dev, &dev->hp_txq,
1080 QE_CMD_REG_WR | QE_CMD_IMM_INQ,
1082 (vpi << 16) | vci, 0 ); /* XXX -- Use defines. */
1084 submit_command (dev, &dev->hp_txq,
1085 QE_CMD_RX_EN | QE_CMD_IMM_INQ | vcc->channo,
1089 /* Indicate we're done! */
1090 set_bit(ATM_VF_READY, &atm_vcc->flags);
1097 static void fs_close(struct atm_vcc *atm_vcc)
1099 struct fs_dev *dev = FS_DEV (atm_vcc->dev);
1100 struct fs_vcc *vcc = FS_VCC (atm_vcc);
1101 struct atm_trafprm * txtp;
1102 struct atm_trafprm * rxtp;
1106 clear_bit(ATM_VF_READY, &atm_vcc->flags);
1108 fs_dprintk (FS_DEBUG_QSIZE, "--==**[%d]**==--", dev->ntxpckts);
1109 if (vcc->last_skb) {
1110 fs_dprintk (FS_DEBUG_QUEUE, "Waiting for skb %p to be sent.\n",
1112 /* We're going to wait for the last packet to get sent on this VC. It would
1113 be impolite not to send them don't you think?
1115 We don't know which packets didn't get sent. So if we get interrupted in
1116 this sleep_on, we'll lose any reference to these packets. Memory leak!
1117 On the other hand, it's awfully convenient that we can abort a "close" that
1118 is taking too long. Maybe just use non-interruptible sleep on? -- REW */
1119 interruptible_sleep_on (& vcc->close_wait);
1122 txtp = &atm_vcc->qos.txtp;
1123 rxtp = &atm_vcc->qos.rxtp;
1126 /* See App note XXX (Unpublished as of now) for the reason for the
1127 removal of the "CMD_IMM_INQ" part of the TX_PURGE_INH... -- REW */
1129 if (DO_DIRECTION (txtp)) {
1130 submit_command (dev, &dev->hp_txq,
1131 QE_CMD_TX_PURGE_INH | /*QE_CMD_IMM_INQ|*/ vcc->channo, 0,0,0);
1132 clear_bit (vcc->channo, dev->tx_inuse);
1135 if (DO_DIRECTION (rxtp)) {
1136 submit_command (dev, &dev->hp_txq,
1137 QE_CMD_RX_PURGE_INH | QE_CMD_IMM_INQ | vcc->channo, 0,0,0);
1138 dev->atm_vccs [vcc->channo] = NULL;
1140 /* This means that this is configured as a receive channel */
1141 if (IS_FS50 (dev)) {
1142 /* Disable the receive filter. Is 0/0 indeed an invalid receive
1143 channel? -- REW. Yes it is. -- Hang. Ok. I'll use -1
1144 (0xfff...) -- REW */
1145 submit_command (dev, &dev->hp_txq,
1146 QE_CMD_REG_WR | QE_CMD_IMM_INQ,
1147 0x80 + vcc->channo, -1, 0 );
1151 fs_dprintk (FS_DEBUG_ALLOC, "Free vcc: %p\n", vcc);
1158 static int fs_send (struct atm_vcc *atm_vcc, struct sk_buff *skb)
1160 struct fs_dev *dev = FS_DEV (atm_vcc->dev);
1161 struct fs_vcc *vcc = FS_VCC (atm_vcc);
1162 struct FS_BPENTRY *td;
1166 fs_dprintk (FS_DEBUG_TXMEM, "I");
1167 fs_dprintk (FS_DEBUG_SEND, "Send: atm_vcc %p skb %p vcc %p dev %p\n",
1168 atm_vcc, skb, vcc, dev);
1170 fs_dprintk (FS_DEBUG_ALLOC, "Alloc t-skb: %p (atm_send)\n", skb);
1172 ATM_SKB(skb)->vcc = atm_vcc;
1174 vcc->last_skb = skb;
1176 td = kmalloc (sizeof (struct FS_BPENTRY), GFP_ATOMIC);
1177 fs_dprintk (FS_DEBUG_ALLOC, "Alloc transd: %p(%Zd)\n", td, sizeof (struct FS_BPENTRY));
1179 /* Oops out of mem */
1183 fs_dprintk (FS_DEBUG_SEND, "first word in buffer: %x\n",
1184 *(int *) skb->data);
1186 td->flags = TD_EPI | TD_DATA | skb->len;
1188 td->bsa = virt_to_bus (skb->data);
1195 dq[qd].flags = td->flags;
1196 dq[qd].next = td->next;
1197 dq[qd].bsa = td->bsa;
1198 dq[qd].skb = td->skb;
1199 dq[qd].dev = td->dev;
1201 if (qd >= 60) qd = 0;
1204 submit_queue (dev, &dev->hp_txq,
1205 QE_TRANSMIT_DE | vcc->channo,
1206 virt_to_bus (td), 0,
1209 fs_dprintk (FS_DEBUG_QUEUE, "in send: txq %d txrq %d\n",
1210 read_fs (dev, Q_EA (dev->hp_txq.offset)) -
1211 read_fs (dev, Q_SA (dev->hp_txq.offset)),
1212 read_fs (dev, Q_EA (dev->tx_relq.offset)) -
1213 read_fs (dev, Q_SA (dev->tx_relq.offset)));
1220 /* Some function placeholders for functions we don't yet support. */
1223 static int fs_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
1227 return -ENOIOCTLCMD;
1231 static int fs_getsockopt(struct atm_vcc *vcc,int level,int optname,
1232 void __user *optval,int optlen)
1240 static int fs_setsockopt(struct atm_vcc *vcc,int level,int optname,
1241 void __user *optval,int optlen)
1249 static void fs_phy_put(struct atm_dev *dev,unsigned char value,
1257 static unsigned char fs_phy_get(struct atm_dev *dev,unsigned long addr)
1265 static int fs_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flags)
1275 static const struct atmdev_ops ops = {
1279 .owner = THIS_MODULE,
1280 /* ioctl: fs_ioctl, */
1281 /* getsockopt: fs_getsockopt, */
1282 /* setsockopt: fs_setsockopt, */
1283 /* change_qos: fs_change_qos, */
1285 /* For now implement these internally here... */
1286 /* phy_put: fs_phy_put, */
1287 /* phy_get: fs_phy_get, */
1291 static void __devinit undocumented_pci_fix (struct pci_dev *pdev)
1295 /* The Windows driver says: */
1296 /* Switch off FireStream Retry Limit Threshold
1299 /* The register at 0x28 is documented as "reserved", no further
1302 pci_read_config_dword (pdev, 0x28, &tint);
1305 pci_write_config_dword (pdev, 0x28, tint);
1311 /**************************************************************************
1313 **************************************************************************/
1315 static void __devinit write_phy (struct fs_dev *dev, int regnum, int val)
1317 submit_command (dev, &dev->hp_txq, QE_CMD_PRP_WR | QE_CMD_IMM_INQ,
1321 static int __devinit init_phy (struct fs_dev *dev, struct reginit_item *reginit)
1326 while (reginit->reg != PHY_EOF) {
1327 if (reginit->reg == PHY_CLEARALL) {
1328 /* "PHY_CLEARALL means clear all registers. Numregisters is in "val". */
1329 for (i=0;i<reginit->val;i++) {
1330 write_phy (dev, i, 0);
1333 write_phy (dev, reginit->reg, reginit->val);
1341 static void reset_chip (struct fs_dev *dev)
1345 write_fs (dev, SARMODE0, SARMODE0_SRTS0);
1347 /* Undocumented delay */
1350 /* The "internal registers are documented to all reset to zero, but
1351 comments & code in the Windows driver indicates that the pools are
1353 for (i=0;i < FS_NR_FREE_POOLS;i++) {
1354 write_fs (dev, FP_CNF (RXB_FP(i)), 0);
1355 write_fs (dev, FP_SA (RXB_FP(i)), 0);
1356 write_fs (dev, FP_EA (RXB_FP(i)), 0);
1357 write_fs (dev, FP_CNT (RXB_FP(i)), 0);
1358 write_fs (dev, FP_CTU (RXB_FP(i)), 0);
1361 /* The same goes for the match channel registers, although those are
1362 NOT documented that way in the Windows driver. -- REW */
1363 /* The Windows driver DOES write 0 to these registers somewhere in
1364 the init sequence. However, a small hardware-feature, will
1365 prevent reception of data on VPI/VCI = 0/0 (Unless the channel
1366 allocated happens to have no disabled channels that have a lower
1369 /* Clear the match channel registers. */
1370 if (IS_FS50 (dev)) {
1371 for (i=0;i<FS50_NR_CHANNELS;i++) {
1372 write_fs (dev, 0x200 + i * 4, -1);
1377 static void __devinit *aligned_kmalloc (int size, unsigned int __nocast flags,
1382 if (alignment <= 0x10) {
1383 t = kmalloc (size, flags);
1384 if ((unsigned long)t & (alignment-1)) {
1385 printk ("Kmalloc doesn't align things correctly! %p\n", t);
1387 return aligned_kmalloc (size, flags, alignment * 4);
1391 printk (KERN_ERR "Request for > 0x10 alignment not yet implemented (hard!)\n");
1395 static int __devinit init_q (struct fs_dev *dev,
1396 struct queue *txq, int queue, int nentries, int is_rq)
1398 int sz = nentries * sizeof (struct FS_QENTRY);
1399 struct FS_QENTRY *p;
1403 fs_dprintk (FS_DEBUG_INIT, "Inititing queue at %x: %d entries:\n",
1406 p = aligned_kmalloc (sz, GFP_KERNEL, 0x10);
1407 fs_dprintk (FS_DEBUG_ALLOC, "Alloc queue: %p(%d)\n", p, sz);
1411 write_fs (dev, Q_SA(queue), virt_to_bus(p));
1412 write_fs (dev, Q_EA(queue), virt_to_bus(p+nentries-1));
1413 write_fs (dev, Q_WP(queue), virt_to_bus(p));
1414 write_fs (dev, Q_RP(queue), virt_to_bus(p));
1416 /* Configuration for the receive queue: 0: interrupt immediately,
1417 no pre-warning to empty queues: We do our best to keep the
1418 queue filled anyway. */
1419 write_fs (dev, Q_CNF(queue), 0 );
1424 txq->offset = queue;
1431 static int __devinit init_fp (struct fs_dev *dev,
1432 struct freepool *fp, int queue, int bufsize, int nr_buffers)
1436 fs_dprintk (FS_DEBUG_INIT, "Inititing free pool at %x:\n", queue);
1438 write_fs (dev, FP_CNF(queue), (bufsize * RBFP_RBS) | RBFP_RBSVAL | RBFP_CME);
1439 write_fs (dev, FP_SA(queue), 0);
1440 write_fs (dev, FP_EA(queue), 0);
1441 write_fs (dev, FP_CTU(queue), 0);
1442 write_fs (dev, FP_CNT(queue), 0);
1445 fp->bufsize = bufsize;
1446 fp->nr_buffers = nr_buffers;
1453 static inline int nr_buffers_in_freepool (struct fs_dev *dev, struct freepool *fp)
1456 /* This seems to be unreliable.... */
1457 return read_fs (dev, FP_CNT (fp->offset));
1464 /* Check if this gets going again if a pool ever runs out. -- Yes, it
1465 does. I've seen "receive abort: no buffers" and things started
1466 working again after that... -- REW */
1468 static void top_off_fp (struct fs_dev *dev, struct freepool *fp,
1469 unsigned int __nocast gfp_flags)
1471 struct FS_BPENTRY *qe, *ne;
1472 struct sk_buff *skb;
1475 fs_dprintk (FS_DEBUG_QUEUE, "Topping off queue at %x (%d-%d/%d)\n",
1476 fp->offset, read_fs (dev, FP_CNT (fp->offset)), fp->n,
1478 while (nr_buffers_in_freepool(dev, fp) < fp->nr_buffers) {
1480 skb = alloc_skb (fp->bufsize, gfp_flags);
1481 fs_dprintk (FS_DEBUG_ALLOC, "Alloc rec-skb: %p(%d)\n", skb, fp->bufsize);
1483 ne = kmalloc (sizeof (struct FS_BPENTRY), gfp_flags);
1484 fs_dprintk (FS_DEBUG_ALLOC, "Alloc rec-d: %p(%Zd)\n", ne, sizeof (struct FS_BPENTRY));
1486 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", skb);
1487 dev_kfree_skb_any (skb);
1491 fs_dprintk (FS_DEBUG_QUEUE, "Adding skb %p desc %p -> %p(%p) ",
1492 skb, ne, skb->data, skb->head);
1494 ne->flags = FP_FLAGS_EPI | fp->bufsize;
1495 ne->next = virt_to_bus (NULL);
1496 ne->bsa = virt_to_bus (skb->data);
1497 ne->aal_bufsize = fp->bufsize;
1501 qe = (struct FS_BPENTRY *) (read_fs (dev, FP_EA(fp->offset)));
1502 fs_dprintk (FS_DEBUG_QUEUE, "link at %p\n", qe);
1504 qe = bus_to_virt ((long) qe);
1505 qe->next = virt_to_bus(ne);
1506 qe->flags &= ~FP_FLAGS_EPI;
1508 write_fs (dev, FP_SA(fp->offset), virt_to_bus(ne));
1510 write_fs (dev, FP_EA(fp->offset), virt_to_bus (ne));
1511 fp->n++; /* XXX Atomic_inc? */
1512 write_fs (dev, FP_CTU(fp->offset), 1);
1515 fs_dprintk (FS_DEBUG_QUEUE, "Added %d entries. \n", n);
1518 static void __devexit free_queue (struct fs_dev *dev, struct queue *txq)
1522 write_fs (dev, Q_SA(txq->offset), 0);
1523 write_fs (dev, Q_EA(txq->offset), 0);
1524 write_fs (dev, Q_RP(txq->offset), 0);
1525 write_fs (dev, Q_WP(txq->offset), 0);
1526 /* Configuration ? */
1528 fs_dprintk (FS_DEBUG_ALLOC, "Free queue: %p\n", txq->sa);
1534 static void __devexit free_freepool (struct fs_dev *dev, struct freepool *fp)
1538 write_fs (dev, FP_CNF(fp->offset), 0);
1539 write_fs (dev, FP_SA (fp->offset), 0);
1540 write_fs (dev, FP_EA (fp->offset), 0);
1541 write_fs (dev, FP_CNT(fp->offset), 0);
1542 write_fs (dev, FP_CTU(fp->offset), 0);
1549 static irqreturn_t fs_irq (int irq, void *dev_id, struct pt_regs * pt_regs)
1553 struct fs_dev *dev = dev_id;
1555 status = read_fs (dev, ISR);
1561 #ifdef IRQ_RATE_LIMIT
1562 /* Aaargh! I'm ashamed. This costs more lines-of-code than the actual
1563 interrupt routine!. (Well, used to when I wrote that comment) -- REW */
1568 if (lastjif == jiffies) {
1569 if (++nintr > IRQ_RATE_LIMIT) {
1570 free_irq (dev->irq, dev_id);
1571 printk (KERN_ERR "fs: Too many interrupts. Turning off interrupt %d.\n",
1580 fs_dprintk (FS_DEBUG_QUEUE, "in intr: txq %d txrq %d\n",
1581 read_fs (dev, Q_EA (dev->hp_txq.offset)) -
1582 read_fs (dev, Q_SA (dev->hp_txq.offset)),
1583 read_fs (dev, Q_EA (dev->tx_relq.offset)) -
1584 read_fs (dev, Q_SA (dev->tx_relq.offset)));
1586 /* print the bits in the ISR register. */
1587 if (fs_debug & FS_DEBUG_IRQ) {
1588 /* The FS_DEBUG things are unneccesary here. But this way it is
1589 clear for grep that these are debug prints. */
1590 fs_dprintk (FS_DEBUG_IRQ, "IRQ status:");
1592 if (status & (1 << i))
1593 fs_dprintk (FS_DEBUG_IRQ, " %s", irq_bitname[i]);
1594 fs_dprintk (FS_DEBUG_IRQ, "\n");
1597 if (status & ISR_RBRQ0_W) {
1598 fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (0)!!!!\n");
1599 process_incoming (dev, &dev->rx_rq[0]);
1600 /* items mentioned on RBRQ0 are from FP 0 or 1. */
1601 top_off_fp (dev, &dev->rx_fp[0], GFP_ATOMIC);
1602 top_off_fp (dev, &dev->rx_fp[1], GFP_ATOMIC);
1605 if (status & ISR_RBRQ1_W) {
1606 fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (1)!!!!\n");
1607 process_incoming (dev, &dev->rx_rq[1]);
1608 top_off_fp (dev, &dev->rx_fp[2], GFP_ATOMIC);
1609 top_off_fp (dev, &dev->rx_fp[3], GFP_ATOMIC);
1612 if (status & ISR_RBRQ2_W) {
1613 fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (2)!!!!\n");
1614 process_incoming (dev, &dev->rx_rq[2]);
1615 top_off_fp (dev, &dev->rx_fp[4], GFP_ATOMIC);
1616 top_off_fp (dev, &dev->rx_fp[5], GFP_ATOMIC);
1619 if (status & ISR_RBRQ3_W) {
1620 fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (3)!!!!\n");
1621 process_incoming (dev, &dev->rx_rq[3]);
1622 top_off_fp (dev, &dev->rx_fp[6], GFP_ATOMIC);
1623 top_off_fp (dev, &dev->rx_fp[7], GFP_ATOMIC);
1626 if (status & ISR_CSQ_W) {
1627 fs_dprintk (FS_DEBUG_IRQ, "Command executed ok!\n");
1628 process_return_queue (dev, &dev->st_q);
1631 if (status & ISR_TBRQ_W) {
1632 fs_dprintk (FS_DEBUG_IRQ, "Data tramsitted!\n");
1633 process_txdone_queue (dev, &dev->tx_relq);
1642 static void fs_poll (unsigned long data)
1644 struct fs_dev *dev = (struct fs_dev *) data;
1646 fs_irq (0, dev, NULL);
1647 dev->timer.expires = jiffies + FS_POLL_FREQ;
1648 add_timer (&dev->timer);
1652 static int __devinit fs_init (struct fs_dev *dev)
1654 struct pci_dev *pci_dev;
1659 pci_dev = dev->pci_dev;
1661 printk (KERN_INFO "found a FireStream %d card, base %08lx, irq%d.\n",
1662 IS_FS50(dev)?50:155,
1663 pci_resource_start(pci_dev, 0), dev->pci_dev->irq);
1665 if (fs_debug & FS_DEBUG_INIT)
1666 my_hd ((unsigned char *) dev, sizeof (*dev));
1668 undocumented_pci_fix (pci_dev);
1670 dev->hw_base = pci_resource_start(pci_dev, 0);
1672 dev->base = ioremap(dev->hw_base, 0x1000);
1676 write_fs (dev, SARMODE0, 0
1677 | (0 * SARMODE0_SHADEN) /* We don't use shadow registers. */
1678 | (1 * SARMODE0_INTMODE_READCLEAR)
1679 | (1 * SARMODE0_CWRE)
1680 | IS_FS50(dev)?SARMODE0_PRPWT_FS50_5:
1681 SARMODE0_PRPWT_FS155_3
1682 | (1 * SARMODE0_CALSUP_1)
1685 | SARMODE0_ABRVCS_32
1686 | SARMODE0_TXVCS_32):
1689 | SARMODE0_ABRVCS_1k
1690 | SARMODE0_TXVCS_1k));
1692 /* 10ms * 100 is 1 second. That should be enough, as AN3:9 says it takes
1696 isr = read_fs (dev, ISR);
1698 /* This bit is documented as "RESERVED" */
1699 if (isr & ISR_INIT_ERR) {
1700 printk (KERN_ERR "Error initializing the FS... \n");
1703 if (isr & ISR_INIT) {
1704 fs_dprintk (FS_DEBUG_INIT, "Ha! Initialized OK!\n");
1708 /* Try again after 10ms. */
1713 printk (KERN_ERR "timeout initializing the FS... \n");
1717 /* XXX fix for fs155 */
1718 dev->channel_mask = 0x1f;
1722 write_fs (dev, SARMODE1, 0
1723 | (fs_keystream * SARMODE1_DEFHEC) /* XXX PHY */
1724 | ((loopback == 1) * SARMODE1_TSTLP) /* XXX Loopback mode enable... */
1725 | (1 * SARMODE1_DCRM)
1726 | (1 * SARMODE1_DCOAM)
1727 | (0 * SARMODE1_OAMCRC)
1728 | (0 * SARMODE1_DUMPE)
1729 | (0 * SARMODE1_GPLEN)
1730 | (0 * SARMODE1_GNAM)
1731 | (0 * SARMODE1_GVAS)
1732 | (0 * SARMODE1_GPAS)
1733 | (1 * SARMODE1_GPRI)
1734 | (0 * SARMODE1_PMS)
1735 | (0 * SARMODE1_GFCR)
1736 | (1 * SARMODE1_HECM2)
1737 | (1 * SARMODE1_HECM1)
1738 | (1 * SARMODE1_HECM0)
1739 | (1 << 12) /* That's what hang's driver does. Program to 0 */
1740 | (0 * 0xff) /* XXX FS155 */);
1743 /* Cal prescale etc */
1746 write_fs (dev, TMCONF, 0x0000000f);
1747 write_fs (dev, CALPRESCALE, 0x01010101 * num);
1748 write_fs (dev, 0x80, 0x000F00E4);
1751 write_fs (dev, CELLOSCONF, 0
1752 | ( 0 * CELLOSCONF_CEN)
1754 | (0x80 * CELLOSCONF_COBS)
1755 | (num * CELLOSCONF_COPK) /* Changed from 0xff to 0x5a */
1756 | (num * CELLOSCONF_COST));/* after a hint from Hang.
1757 * performance jumped 50->70... */
1759 /* Magic value by Hang */
1760 write_fs (dev, CELLOSCONF_COST, 0x0B809191);
1762 if (IS_FS50 (dev)) {
1763 write_fs (dev, RAS0, RAS0_DCD_XHLT);
1764 dev->atm_dev->ci_range.vpi_bits = 12;
1765 dev->atm_dev->ci_range.vci_bits = 16;
1766 dev->nchannels = FS50_NR_CHANNELS;
1768 write_fs (dev, RAS0, RAS0_DCD_XHLT
1769 | (((1 << FS155_VPI_BITS) - 1) * RAS0_VPSEL)
1770 | (((1 << FS155_VCI_BITS) - 1) * RAS0_VCSEL));
1771 /* We can chose the split arbitarily. We might be able to
1772 support more. Whatever. This should do for now. */
1773 dev->atm_dev->ci_range.vpi_bits = FS155_VPI_BITS;
1774 dev->atm_dev->ci_range.vci_bits = FS155_VCI_BITS;
1776 /* Address bits we can't use should be compared to 0. */
1777 write_fs (dev, RAC, 0);
1779 /* Manual (AN9, page 6) says ASF1=0 means compare Utopia address
1780 * too. I can't find ASF1 anywhere. Anyway, we AND with just the
1781 * other bits, then compare with 0, which is exactly what we
1783 write_fs (dev, RAM, (1 << (28 - FS155_VPI_BITS - FS155_VCI_BITS)) - 1);
1784 dev->nchannels = FS155_NR_CHANNELS;
1786 dev->atm_vccs = kmalloc (dev->nchannels * sizeof (struct atm_vcc *),
1788 fs_dprintk (FS_DEBUG_ALLOC, "Alloc atmvccs: %p(%Zd)\n",
1789 dev->atm_vccs, dev->nchannels * sizeof (struct atm_vcc *));
1791 if (!dev->atm_vccs) {
1792 printk (KERN_WARNING "Couldn't allocate memory for VCC buffers. Woops!\n");
1793 /* XXX Clean up..... */
1796 memset (dev->atm_vccs, 0, dev->nchannels * sizeof (struct atm_vcc *));
1798 dev->tx_inuse = kmalloc (dev->nchannels / 8 /* bits/byte */ , GFP_KERNEL);
1799 fs_dprintk (FS_DEBUG_ALLOC, "Alloc tx_inuse: %p(%d)\n",
1800 dev->atm_vccs, dev->nchannels / 8);
1802 if (!dev->tx_inuse) {
1803 printk (KERN_WARNING "Couldn't allocate memory for tx_inuse bits!\n");
1804 /* XXX Clean up..... */
1807 memset (dev->tx_inuse, 0, dev->nchannels / 8);
1809 /* -- RAS1 : FS155 and 50 differ. Default (0) should be OK for both */
1810 /* -- RAS2 : FS50 only: Default is OK. */
1812 /* DMAMODE, default should be OK. -- REW */
1813 write_fs (dev, DMAMR, DMAMR_TX_MODE_FULL);
1815 init_q (dev, &dev->hp_txq, TX_PQ(TXQ_HP), TXQ_NENTRIES, 0);
1816 init_q (dev, &dev->lp_txq, TX_PQ(TXQ_LP), TXQ_NENTRIES, 0);
1817 init_q (dev, &dev->tx_relq, TXB_RQ, TXQ_NENTRIES, 1);
1818 init_q (dev, &dev->st_q, ST_Q, TXQ_NENTRIES, 1);
1820 for (i=0;i < FS_NR_FREE_POOLS;i++) {
1821 init_fp (dev, &dev->rx_fp[i], RXB_FP(i),
1822 rx_buf_sizes[i], rx_pool_sizes[i]);
1823 top_off_fp (dev, &dev->rx_fp[i], GFP_KERNEL);
1827 for (i=0;i < FS_NR_RX_QUEUES;i++)
1828 init_q (dev, &dev->rx_rq[i], RXB_RQ(i), RXRQ_NENTRIES, 1);
1830 dev->irq = pci_dev->irq;
1831 if (request_irq (dev->irq, fs_irq, SA_SHIRQ, "firestream", dev)) {
1832 printk (KERN_WARNING "couldn't get irq %d for firestream.\n", pci_dev->irq);
1833 /* XXX undo all previous stuff... */
1836 fs_dprintk (FS_DEBUG_INIT, "Grabbed irq %d for dev at %p.\n", dev->irq, dev);
1838 /* We want to be notified of most things. Just the statistics count
1839 overflows are not interesting */
1840 write_fs (dev, IMR, 0
1848 write_fs (dev, SARMODE0, 0
1849 | (0 * SARMODE0_SHADEN) /* We don't use shadow registers. */
1850 | (1 * SARMODE0_GINT)
1851 | (1 * SARMODE0_INTMODE_READCLEAR)
1852 | (0 * SARMODE0_CWRE)
1853 | (IS_FS50(dev)?SARMODE0_PRPWT_FS50_5:
1854 SARMODE0_PRPWT_FS155_3)
1855 | (1 * SARMODE0_CALSUP_1)
1858 | SARMODE0_ABRVCS_32
1859 | SARMODE0_TXVCS_32):
1862 | SARMODE0_ABRVCS_1k
1863 | SARMODE0_TXVCS_1k))
1864 | (1 * SARMODE0_RUN));
1866 init_phy (dev, PHY_NTC_INIT);
1868 if (loopback == 2) {
1869 write_phy (dev, 0x39, 0x000e);
1873 init_timer (&dev->timer);
1874 dev->timer.data = (unsigned long) dev;
1875 dev->timer.function = fs_poll;
1876 dev->timer.expires = jiffies + FS_POLL_FREQ;
1877 add_timer (&dev->timer);
1880 dev->atm_dev->dev_data = dev;
1886 static int __devinit firestream_init_one (struct pci_dev *pci_dev,
1887 const struct pci_device_id *ent)
1889 struct atm_dev *atm_dev;
1890 struct fs_dev *fs_dev;
1892 if (pci_enable_device(pci_dev))
1895 fs_dev = kmalloc (sizeof (struct fs_dev), GFP_KERNEL);
1896 fs_dprintk (FS_DEBUG_ALLOC, "Alloc fs-dev: %p(%Zd)\n",
1897 fs_dev, sizeof (struct fs_dev));
1901 memset (fs_dev, 0, sizeof (struct fs_dev));
1903 atm_dev = atm_dev_register("fs", &ops, -1, NULL);
1905 goto err_out_free_fs_dev;
1907 fs_dev->pci_dev = pci_dev;
1908 fs_dev->atm_dev = atm_dev;
1909 fs_dev->flags = ent->driver_data;
1911 if (fs_init(fs_dev))
1912 goto err_out_free_atm_dev;
1914 fs_dev->next = fs_boards;
1918 err_out_free_atm_dev:
1919 atm_dev_deregister(atm_dev);
1920 err_out_free_fs_dev:
1926 static void __devexit firestream_remove_one (struct pci_dev *pdev)
1929 struct fs_dev *dev, *nxtdev;
1931 struct FS_BPENTRY *fp, *nxt;
1936 printk ("hptxq:\n");
1937 for (i=0;i<60;i++) {
1938 printk ("%d: %08x %08x %08x %08x \n",
1939 i, pq[qp].cmd, pq[qp].p0, pq[qp].p1, pq[qp].p2);
1941 if (qp >= 60) qp = 0;
1944 printk ("descriptors:\n");
1945 for (i=0;i<60;i++) {
1946 printk ("%d: %p: %08x %08x %p %p\n",
1947 i, da[qd], dq[qd].flags, dq[qd].bsa, dq[qd].skb, dq[qd].dev);
1949 if (qd >= 60) qd = 0;
1953 for (dev = fs_boards;dev != NULL;dev=nxtdev) {
1954 fs_dprintk (FS_DEBUG_CLEANUP, "Releasing resources for dev at %p.\n", dev);
1956 /* XXX Hit all the tx channels too! */
1958 for (i=0;i < dev->nchannels;i++) {
1959 if (dev->atm_vccs[i]) {
1960 vcc = FS_VCC (dev->atm_vccs[i]);
1961 submit_command (dev, &dev->hp_txq,
1962 QE_CMD_TX_PURGE_INH | QE_CMD_IMM_INQ | vcc->channo, 0,0,0);
1963 submit_command (dev, &dev->hp_txq,
1964 QE_CMD_RX_PURGE_INH | QE_CMD_IMM_INQ | vcc->channo, 0,0,0);
1969 /* XXX Wait a while for the chip to release all buffers. */
1971 for (i=0;i < FS_NR_FREE_POOLS;i++) {
1972 for (fp=bus_to_virt (read_fs (dev, FP_SA(dev->rx_fp[i].offset)));
1973 !(fp->flags & FP_FLAGS_EPI);fp = nxt) {
1974 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", fp->skb);
1975 dev_kfree_skb_any (fp->skb);
1976 nxt = bus_to_virt (fp->next);
1977 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", fp);
1980 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", fp->skb);
1981 dev_kfree_skb_any (fp->skb);
1982 fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", fp);
1986 /* Hang the chip in "reset", prevent it clobbering memory that is
1990 fs_dprintk (FS_DEBUG_CLEANUP, "Freeing irq%d.\n", dev->irq);
1991 free_irq (dev->irq, dev);
1992 del_timer (&dev->timer);
1994 atm_dev_deregister(dev->atm_dev);
1995 free_queue (dev, &dev->hp_txq);
1996 free_queue (dev, &dev->lp_txq);
1997 free_queue (dev, &dev->tx_relq);
1998 free_queue (dev, &dev->st_q);
2000 fs_dprintk (FS_DEBUG_ALLOC, "Free atmvccs: %p\n", dev->atm_vccs);
2001 kfree (dev->atm_vccs);
2003 for (i=0;i< FS_NR_FREE_POOLS;i++)
2004 free_freepool (dev, &dev->rx_fp[i]);
2006 for (i=0;i < FS_NR_RX_QUEUES;i++)
2007 free_queue (dev, &dev->rx_rq[i]);
2009 fs_dprintk (FS_DEBUG_ALLOC, "Free fs-dev: %p\n", dev);
2017 static struct pci_device_id firestream_pci_tbl[] = {
2018 { PCI_VENDOR_ID_FUJITSU_ME, PCI_DEVICE_ID_FUJITSU_FS50,
2019 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FS_IS50},
2020 { PCI_VENDOR_ID_FUJITSU_ME, PCI_DEVICE_ID_FUJITSU_FS155,
2021 PCI_ANY_ID, PCI_ANY_ID, 0, 0, FS_IS155},
2025 MODULE_DEVICE_TABLE(pci, firestream_pci_tbl);
2027 static struct pci_driver firestream_driver = {
2028 .name = "firestream",
2029 .id_table = firestream_pci_tbl,
2030 .probe = firestream_init_one,
2031 .remove = __devexit_p(firestream_remove_one),
2034 static int __init firestream_init_module (void)
2039 error = pci_register_driver(&firestream_driver);
2044 static void __exit firestream_cleanup_module(void)
2046 pci_unregister_driver(&firestream_driver);
2049 module_init(firestream_init_module);
2050 module_exit(firestream_cleanup_module);
2052 MODULE_LICENSE("GPL");