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Date: Wed, 22 Nov 2000 10:32:23 +0100 (CET)
From: Patrick van de Lageweg <patrick@bitwizard.nl>
To: Linus Torvalds <torvalds@transmeta.com>
Subject: [NEW DRIVER] firestream
Hi Linus,
This is the driver for the Fujitsu Firestream atm cards (fs50 and
fs155). Please consider including this driver in the tree.
Thanks
Patrick
diff -u -r --new-file linux-2.4.0-test11.clean/drivers/atm/firestream.c linux-2.4.0-test11.fs50+atmrefcount/drivers/atm/firestream.c
--- linux-2.4.0-test11.clean/drivers/atm/firestream.c Thu Jan 1 01:00:00 1970
+++ linux-2.4.0-test11.fs50+atmrefcount/drivers/atm/firestream.c Wed Nov 22 08:59:12 2000
@@ -0,0 +1,2045 @@
+
+/* drivers/atm/firestream.c - FireStream 155 (MB86697) and
+ * FireStream 50 (MB86695) device driver
+ */
+
+/* Written & (C) 2000 by R.E.Wolff@BitWizard.nl
+ * Copied snippets from zatm.c by Werner Almesberger, EPFL LRC/ICA
+ * and ambassador.c Copyright (C) 1995-1999 Madge Networks Ltd
+ */
+
+/*
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ The GNU GPL is contained in /usr/doc/copyright/GPL on a Debian
+ system and in the file COPYING in the Linux kernel source.
+*/
+
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/pci.h>
+#include <linux/errno.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/sonet.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/delay.h>
+#include <linux/ioport.h> /* for request_region */
+#include <linux/uio.h>
+#include <linux/init.h>
+#include <linux/capability.h>
+#include <linux/bitops.h>
+#include <asm/byteorder.h>
+#include <asm/system.h>
+#include <asm/string.h>
+#include <asm/io.h>
+#include <asm/atomic.h>
+#include <asm/uaccess.h>
+#include <linux/wait.h>
+
+#include "firestream.h"
+
+
+int loopback = 0;
+int num=0x5a;
+
+/* According to measurements (but they look suspicious to me!) done in
+ * '97, 37% of the packets are one cell in size. So it pays to have
+ * buffers allocated at that size. A large jump in percentage of
+ * packets occurs at packets around 536 bytes in length. So it also
+ * pays to have those pre-allocated. Unfortunately, we can't fully
+ * take advantage of this as the majority of the packets is likely to
+ * be TCP/IP (As where obviously the measurement comes from) There the
+ * link would be opened with say a 1500 byte MTU, and we can't handle
+ * smaller buffers more efficiently than the larger ones. -- REW
+ */
+
+/* Due to the way Linux memory management works, specifying "576" as
+ * an allocation size here isn't going to help. They are allocated
+ * from 1024-byte regions anyway. With the size of the sk_buffs (quite
+ * large), it doesn't pay to allocate the smallest size (64) -- REW */
+
+/* This is all guesswork. Hard numbers to back this up or disprove this,
+ * are appreciated. -- REW */
+
+/* The last entry should be about 64k. However, the "buffer size" is
+ * passed to the chip in a 16 bit field. I don't know how "65536"
+ * would be interpreted. -- REW */
+
+#define NP FS_NR_FREE_POOLS
+int rx_buf_sizes[NP] = {128, 256, 512, 1024, 2048, 4096, 16384, 65520};
+/* log2: 7 8 9 10 11 12 14 16 */
+
+#if 0
+int rx_pool_sizes[NP] = {1024, 1024, 512, 256, 128, 64, 32, 32};
+#else
+/* debug */
+int rx_pool_sizes[NP] = {128, 128, 128, 64, 64, 64, 32, 32};
+#endif
+/* log2: 10 10 9 8 7 6 5 5 */
+/* sumlog2: 17 18 18 18 18 18 19 21 */
+/* mem allocated: 128k 256k 256k 256k 256k 256k 512k 2M */
+/* tot mem: almost 4M */
+
+/* NP is shorter, so that it fits on a single line. */
+#undef NP
+
+
+/* Small hardware gotcha:
+
+ The FS50 CAM (VP/VC match registers) always take the lowest channel
+ number that matches. This is not a problem.
+
+ However, they also ignore wether the channel is enabled or
+ not. This means that if you allocate channel 0 to 1.2 and then
+ channel 1 to 0.0, then disabeling channel 0 and writing 0 to the
+ match channel for channel 0 will "steal" the traffic from channel
+ 1, even if you correctly disable channel 0.
+
+ Workaround:
+
+ - When disabling channels, write an invalid VP/VC value to the
+ match register. (We use 0xffffffff, which in the worst case
+ matches VP/VC = <maxVP>/<maxVC>, but I expect it not to match
+ anything as some "when not in use, program to 0" bits are now
+ programmed to 1...)
+
+ - Don't initialize the match registers to 0, as 0.0 is a valid
+ channel.
+*/
+
+
+/* Optimization hints and tips.
+
+ The FireStream chips are very capable of reducing the amount of
+ "interrupt-traffic" for the CPU. This driver requests an interrupt on EVERY
+ action. You could try to minimize this a bit.
+
+ Besides that, the userspace->kernel copy and the PCI bus are the
+ performance limiting issues for this driver.
+
+ You could queue up a bunch of outgoing packets without telling the
+ FireStream. I'm not sure that's going to win you much though. The
+ Linux layer won't tell us in advance when it's not going to give us
+ any more packets in a while. So this is tricky to implement right without
+ introducing extra delays.
+
+ -- REW
+ */
+
+
+
+
+/* The strings that define what the RX queue entry is all about. */
+/* Fujitsu: Please tell me which ones can have a pointer to a
+ freepool descriptor! */
+static char *res_strings[] = {
+ "RX OK: streaming not EOP",
+ "RX OK: streaming EOP",
+ "RX OK: Single buffer packet",
+ "RX OK: packet mode",
+ "RX OK: F4 OAM (end to end)",
+ "RX OK: F4 OAM (Segment)",
+ "RX OK: F5 OAM (end to end)",
+ "RX OK: F5 OAM (Segment)",
+ "RX OK: RM cell",
+ "RX OK: TRANSP cell",
+ "RX OK: TRANSPC cell",
+ "Unmatched cell",
+ "reserved 12",
+ "reserved 13",
+ "reserved 14",
+ "Unrecognized cell",
+ "reserved 16",
+ "reassemby abort: AAL5 abort",
+ "packet purged",
+ "packet ageing timeout",
+ "channel ageing timeout",
+ "calculated lenght error",
+ "programmed lenght limit error",
+ "aal5 crc32 error",
+ "oam transp or transpc crc10 error",
+ "reserved 25",
+ "reserved 26",
+ "reserved 27",
+ "reserved 28",
+ "reserved 29",
+ "reserved 30",
+ "reassembly abort: no buffers",
+ "receive buffer overflow",
+ "change in GFC",
+ "receive buffer full",
+ "low priority discard - no receive descriptor",
+ "low priority discard - missing end of packet",
+ "reserved 41",
+ "reserved 42",
+ "reserved 43",
+ "reserved 44",
+ "reserved 45",
+ "reserved 46",
+ "reserved 47",
+ "reserved 48",
+ "reserved 49",
+ "reserved 50",
+ "reserved 51",
+ "reserved 52",
+ "reserved 53",
+ "reserved 54",
+ "reserved 55",
+ "reserved 56",
+ "reserved 57",
+ "reserved 58",
+ "reserved 59",
+ "reserved 60",
+ "reserved 61",
+ "reserved 62",
+ "reserved 63",
+};
+
+char *irq_bitname[] = {
+ "LPCO",
+ "DPCO",
+ "RBRQ0_W",
+ "RBRQ1_W",
+ "RBRQ2_W",
+ "RBRQ3_W",
+ "RBRQ0_NF",
+ "RBRQ1_NF",
+ "RBRQ2_NF",
+ "RBRQ3_NF",
+ "BFP_SC",
+ "INIT",
+ "INIT_ERR",
+ "USCEO",
+ "UPEC0",
+ "VPFCO",
+ "CRCCO",
+ "HECO",
+ "TBRQ_W",
+ "TBRQ_NF",
+ "CTPQ_E",
+ "GFC_C0",
+ "PCI_FTL",
+ "CSQ_W",
+ "CSQ_NF",
+ "EXT_INT",
+ "RXDMA_S"
+};
+
+
+#define PHY_EOF -1
+#define PHY_CLEARALL -2
+
+struct reginit_item {
+ int reg, val;
+};
+
+
+struct reginit_item PHY_NTC_INIT[] = {
+ { PHY_CLEARALL, 0x40 },
+ { 0x12, 0x0001 },
+ { 0x13, 0x7605 },
+ { 0x1A, 0x0001 },
+ { 0x1B, 0x0005 },
+ { 0x38, 0x0003 },
+ { 0x39, 0x0006 }, /* changed here to make loopback */
+ { 0x01, 0x5262 },
+ { 0x15, 0x0213 },
+ { 0x00, 0x0003 },
+ { PHY_EOF, 0}, /* -1 signals end of list */
+};
+
+
+/* Safetyfeature: If the card interrupts more than this number of times
+ in a jiffy (1/100th of a second) then we just disable the interrupt and
+ print a message. This prevents the system from hanging.
+
+ 150000 packets per second is close to the limit a PC is going to have
+ anyway. We therefore have to disable this for production. -- REW */
+#undef IRQ_RATE_LIMIT 100
+
+/* Interrupts work now. Unlike serial cards, ATM cards don't work all
+ that great without interrupts. -- REW */
+#undef FS_POLL_FREQ 100
+
+/*
+ This driver can spew a whole lot of debugging output at you. If you
+ need maximum performance, you should disable the DEBUG define. To
+ aid in debugging in the field, I'm leaving the compile-time debug
+ features enabled, and disable them "runtime". That allows me to
+ instruct people with problems to enable debugging without requiring
+ them to recompile... -- REW
+*/
+#define DEBUG
+
+#ifdef DEBUG
+#define fs_dprintk(f, str...) if (fs_debug & f) printk (str)
+#else
+#define fs_dprintk(f, str...) /* nothing */
+#endif
+
+
+#ifdef DEBUG
+/* I didn't forget to set this to zero before shipping. Hit me with a stick
+ if you get this with the debug default not set to zero again. -- REW */
+int fs_debug = 0;
+#else
+#define fs_debug 0
+#endif
+
+#ifdef MODULE
+#ifdef DEBUG
+MODULE_PARM(fs_debug, "i");
+#endif
+MODULE_PARM(loopback, "i");
+MODULE_PARM(num, "i");
+/* XXX Add rx_buf_sizes, and rx_pool_sizes As per request Amar. -- REW */
+#endif
+
+
+#define FS_DEBUG_FLOW 0x00000001
+#define FS_DEBUG_OPEN 0x00000002
+#define FS_DEBUG_QUEUE 0x00000004
+#define FS_DEBUG_IRQ 0x00000008
+#define FS_DEBUG_INIT 0x00000010
+#define FS_DEBUG_SEND 0x00000020
+#define FS_DEBUG_PHY 0x00000040
+#define FS_DEBUG_CLEANUP 0x00000080
+#define FS_DEBUG_QOS 0x00000100
+#define FS_DEBUG_TXQ 0x00000200
+#define FS_DEBUG_ALLOC 0x00000400
+#define FS_DEBUG_TXMEM 0x00000800
+#define FS_DEBUG_QSIZE 0x00001000
+
+
+#define func_enter() fs_dprintk (FS_DEBUG_FLOW, "fs: enter " __FUNCTION__ "\n")
+#define func_exit() fs_dprintk (FS_DEBUG_FLOW, "fs: exit " __FUNCTION__ "\n")
+
+
+struct fs_dev *fs_boards = NULL;
+
+#define MIN(a,b) (((a)<(b))?(a):(b))
+
+#ifdef DEBUG
+
+static void my_hd (void *addr, int len)
+{
+ int j, ch;
+ unsigned char *ptr = addr;
+
+ while (len > 0) {
+ printk ("%p ", ptr);
+ for (j=0;j < ((len < 16)?len:16);j++) {
+ printk ("%02x %s", ptr[j], (j==7)?" ":"");
+ }
+ for ( ;j < 16;j++) {
+ printk (" %s", (j==7)?" ":"");
+ }
+ for (j=0;j < ((len < 16)?len:16);j++) {
+ ch = ptr[j];
+ printk ("%c", (ch < 0x20)?'.':((ch > 0x7f)?'.':ch));
+ }
+ printk ("\n");
+ ptr += 16;
+ len -= 16;
+ }
+}
+#else /* DEBUG */
+static void my_hd (void *addr, int len){}
+#endif /* DEBUG */
+
+/********** free an skb (as per ATM device driver documentation) **********/
+
+/* Hmm. If this is ATM specific, why isn't there an ATM routine for this?
+ * I copied it over from the ambassador driver. -- REW */
+
+static inline void fs_kfree_skb (struct sk_buff * skb)
+{
+ if (ATM_SKB(skb)->vcc->pop)
+ ATM_SKB(skb)->vcc->pop (ATM_SKB(skb)->vcc, skb);
+ else
+ dev_kfree_skb_any (skb);
+}
+
+
+
+
+/* It seems the ATM forum recomends this horribly complicated 16bit
+ * floating point format. Turns out the Ambassador uses the exact same
+ * encoding. I just copied it over. If Mitch agrees, I'll move it over
+ * to the atm_misc file or something like that. (and remove it from
+ * here and the ambassador driver) -- REW
+ */
+
+/* The good thing about this format is that it is monotonic. So,
+ a conversion routine need not be very complicated. To be able to
+ round "nearest" we need to take along a few extra bits. Lets
+ put these after 16 bits, so that we can just return the top 16
+ bits of the 32bit number as the result:
+
+ int mr (unsigned int rate, int r)
+ {
+ int e = 16+9;
+ static int round[4]={0, 0, 0xffff, 0x8000};
+ if (!rate) return 0;
+ while (rate & 0xfc000000) {
+ rate >>= 1;
+ e++;
+ }
+ while (! (rate & 0xfe000000)) {
+ rate <<= 1;
+ e--;
+ }
+
+// Now the mantissa is in positions bit 16-25. Excepf for the "hidden 1" that's in bit 26.
+ rate &= ~0x02000000;
+// Next add in the exponent
+ rate |= e << (16+9);
+// And perform the rounding:
+ return (rate + round[r]) >> 16;
+ }
+
+ 14 lines-of-code. Compare that with the 120 that the Ambassador
+ guys needed. (would be 8 lines shorter if I'd try to really reduce
+ the number of lines:
+
+ int mr (unsigned int rate, int r)
+ {
+ int e = 16+9;
+ static int round[4]={0, 0, 0xffff, 0x8000};
+ if (!rate) return 0;
+ for (; rate & 0xfc000000 ;rate >>= 1, e++);
+ for (;!(rate & 0xfe000000);rate <<= 1, e--);
+ return ((rate & ~0x02000000) | (e << (16+9)) + round[r]) >> 16;
+ }
+
+ Exercise for the reader: Remove one more line-of-code, without
+ cheating. (Just joining two lines is cheating). (I know it's
+ possible, don't think you've beat me if you found it... If you
+ manage to lose two lines or more, keep me updated! ;-)
+
+ -- REW */
+
+
+#define ROUND_UP 1
+#define ROUND_DOWN 2
+#define ROUND_NEAREST 3
+/********** make rate (not quite as much fun as Horizon) **********/
+
+static unsigned int make_rate (unsigned int rate, int r,
+ u16 * bits, unsigned int * actual)
+{
+ unsigned char exp = -1; /* hush gcc */
+ unsigned int man = -1; /* hush gcc */
+
+ fs_dprintk (FS_DEBUG_QOS, "make_rate %u", rate);
+
+ /* rates in cells per second, ITU format (nasty 16-bit floating-point)
+ given 5-bit e and 9-bit m:
+ rate = EITHER (1+m/2^9)*2^e OR 0
+ bits = EITHER 1<<14 | e<<9 | m OR 0
+ (bit 15 is "reserved", bit 14 "non-zero")
+ smallest rate is 0 (special representation)
+ largest rate is (1+511/512)*2^31 = 4290772992 (< 2^32-1)
+ smallest non-zero rate is (1+0/512)*2^0 = 1 (> 0)
+ simple algorithm:
+ find position of top bit, this gives e
+ remove top bit and shift (rounding if feeling clever) by 9-e
+ */
+ /* Ambassador ucode bug: please don't set bit 14! so 0 rate not
+ representable. // This should move into the ambassador driver
+ when properly merged. -- REW */
+
+ if (rate > 0xffc00000U) {
+ /* larger than largest representable rate */
+
+ if (r == ROUND_UP) {
+ return -EINVAL;
+ } else {
+ exp = 31;
+ man = 511;
+ }
+
+ } else if (rate) {
+ /* representable rate */
+
+ exp = 31;
+ man = rate;
+
+ /* invariant: rate = man*2^(exp-31) */
+ while (!(man & (1<<31))) {
+ exp = exp - 1;
+ man = man<<1;
+ }
+
+ /* man has top bit set
+ rate = (2^31+(man-2^31))*2^(exp-31)
+ rate = (1+(man-2^31)/2^31)*2^exp
+ */
+ man = man<<1;
+ man &= 0xffffffffU; /* a nop on 32-bit systems */
+ /* rate = (1+man/2^32)*2^exp
+
+ exp is in the range 0 to 31, man is in the range 0 to 2^32-1
+ time to lose significance... we want m in the range 0 to 2^9-1
+ rounding presents a minor problem... we first decide which way
+ we are rounding (based on given rounding direction and possibly
+ the bits of the mantissa that are to be discarded).
+ */
+
+ switch (r) {
+ case ROUND_DOWN: {
+ /* just truncate */
+ man = man>>(32-9);
+ break;
+ }
+ case ROUND_UP: {
+ /* check all bits that we are discarding */
+ if (man & (-1>>9)) {
+ man = (man>>(32-9)) + 1;
+ if (man == (1<<9)) {
+ /* no need to check for round up outside of range */
+ man = 0;
+ exp += 1;
+ }
+ } else {
+ man = (man>>(32-9));
+ }
+ break;
+ }
+ case ROUND_NEAREST: {
+ /* check msb that we are discarding */
+ if (man & (1<<(32-9-1))) {
+ man = (man>>(32-9)) + 1;
+ if (man == (1<<9)) {
+ /* no need to check for round up outside of range */
+ man = 0;
+ exp += 1;
+ }
+ } else {
+ man = (man>>(32-9));
+ }
+ break;
+ }
+ }
+
+ } else {
+ /* zero rate - not representable */
+
+ if (r == ROUND_DOWN) {
+ return -EINVAL;
+ } else {
+ exp = 0;
+ man = 0;
+ }
+ }
+
+ fs_dprintk (FS_DEBUG_QOS, "rate: man=%u, exp=%hu", man, exp);
+
+ if (bits)
+ *bits = /* (1<<14) | */ (exp<<9) | man;
+
+ if (actual)
+ *actual = (exp >= 9)
+ ? (1 << exp) + (man << (exp-9))
+ : (1 << exp) + ((man + (1<<(9-exp-1))) >> (9-exp));
+
+ return 0;
+}
+
+
+
+
+/* FireStream access routines */
+/* For DEEP-DOWN debugging these can be rigged to intercept accesses to
+ certain registers or to just log all accesses. */
+
+void write_fs (struct fs_dev *dev, int offset, int val)
+{
+ writel (val, dev->base + offset);
+}
+
+
+unsigned int read_fs (struct fs_dev *dev, int offset)
+{
+ return readl (dev->base + offset);
+}
+
+
+
+struct FS_QENTRY *get_qentry (struct fs_dev *dev, struct queue *q)
+{
+ return bus_to_virt (read_fs (dev, Q_WP(q->offset)) & Q_ADDR_MASK);
+}
+
+
+void submit_qentry (struct fs_dev *dev, struct queue *q, struct FS_QENTRY *qe)
+{
+ u32 wp;
+ struct FS_QENTRY *cqe;
+
+ /* XXX Sanity check: the write pointer can be checked to be
+ still the same as the value passed as qe... -- REW */
+ /* udelay (5); */
+ while ((wp = read_fs (dev, Q_WP (q->offset))) & Q_FULL) {
+ fs_dprintk (FS_DEBUG_TXQ, "Found queue at %x full. Waiting.\n",
+ q->offset);
+ schedule ();
+ }
+
+ wp &= ~0xf;
+ cqe = bus_to_virt (wp);
+ if (qe != cqe) {
+ fs_dprintk (FS_DEBUG_TXQ, "q mismatch! %p %p\n", qe, cqe);
+ }
+
+ write_fs (dev, Q_WP(q->offset), Q_INCWRAP);
+
+ {
+ static int c;
+ if (!(c++ % 100))
+ {
+ int rp, wp;
+ rp = read_fs (dev, Q_RP(q->offset));
+ wp = read_fs (dev, Q_WP(q->offset));
+ fs_dprintk (FS_DEBUG_TXQ, "q at %d: %x-%x: %x entries.\n",
+ q->offset, rp, wp, wp-rp);
+ }
+ }
+}
+
+
+static struct FS_QENTRY pq[60];
+static int qp;
+
+static struct FS_BPENTRY dq[60];
+static int qd;
+static void *da[60];
+
+void submit_queue (struct fs_dev *dev, struct queue *q,
+ u32 cmd, u32 p1, u32 p2, u32 p3)
+{
+ struct FS_QENTRY *qe;
+
+ qe = get_qentry (dev, q);
+ qe->cmd = cmd;
+ qe->p0 = p1;
+ qe->p1 = p2;
+ qe->p2 = p3;
+ submit_qentry (dev, q, qe);
+
+ pq[qp].cmd = cmd;
+ pq[qp].p0 = p1;
+ pq[qp].p1 = p2;
+ pq[qp].p2 = p3;
+ qp++;
+ if (qp >= 60) qp = 0;
+
+}
+
+/* Test the "other" way one day... -- REW */
+#if 1
+#define submit_command submit_queue
+#else
+
+void submit_command (struct fs_dev *dev, struct queue *q,
+ u32 cmd, u32 p1, u32 p2, u32 p3)
+{
+ write_fs (dev, CMDR0, cmd);
+ write_fs (dev, CMDR1, p1);
+ write_fs (dev, CMDR2, p2);
+ write_fs (dev, CMDR3, p3);
+}
+#endif
+
+
+
+void process_return_queue (struct fs_dev *dev, struct queue *q)
+{
+ long rq;
+ struct FS_QENTRY *qe;
+ void *tc;
+
+ while (!((rq = read_fs (dev, Q_RP(q->offset))) & Q_EMPTY)) {
+ fs_dprintk (FS_DEBUG_QUEUE, "reaping return queue entry at %lx\n", rq);
+ qe = bus_to_virt (rq);
+
+ fs_dprintk (FS_DEBUG_QUEUE, "queue entry: %08x %08x %08x %08x. (%d)\n",
+ qe->cmd, qe->p0, qe->p1, qe->p2, STATUS_CODE (qe));
+
+ switch (STATUS_CODE (qe)) {
+ case 5:
+ tc = bus_to_virt (qe->p0);
+ fs_dprintk (FS_DEBUG_ALLOC, "Free tc: %p\n", tc);
+ kfree (tc);
+ break;
+ }
+
+ write_fs (dev, Q_RP(q->offset), Q_INCWRAP);
+ }
+}
+
+
+void process_txdone_queue (struct fs_dev *dev, struct queue *q)
+{
+ long rq;
+ long tmp;
+ struct FS_QENTRY *qe;
+ struct sk_buff *skb;
+ struct FS_BPENTRY *td;
+
+ while (!((rq = read_fs (dev, Q_RP(q->offset))) & Q_EMPTY)) {
+ fs_dprintk (FS_DEBUG_QUEUE, "reaping txdone entry at %lx\n", rq);
+ qe = bus_to_virt (rq);
+
+ fs_dprintk (FS_DEBUG_QUEUE, "queue entry: %08x %08x %08x %08x: %d\n",
+ qe->cmd, qe->p0, qe->p1, qe->p2, STATUS_CODE (qe));
+
+ if (STATUS_CODE (qe) != 2)
+ fs_dprintk (FS_DEBUG_TXMEM, "queue entry: %08x %08x %08x %08x: %d\n",
+ qe->cmd, qe->p0, qe->p1, qe->p2, STATUS_CODE (qe));
+
+
+ switch (STATUS_CODE (qe)) {
+ case 0x02:
+ /* Process a real txdone entry. */
+ tmp = qe->p0;
+ if (tmp & 0x0f)
+ printk (KERN_WARNING "td not aligned: %ld\n", tmp);
+ tmp &= ~0x0f;
+ td = bus_to_virt (tmp);
+
+ fs_dprintk (FS_DEBUG_QUEUE, "Pool entry: %08x %08x %08x %08x %p.\n",
+ td->flags, td->next, td->bsa, td->aal_bufsize, td->skb );
+
+ skb = td->skb;
+ if (skb == FS_VCC (ATM_SKB(skb)->vcc)->last_skb) {
+ wake_up_interruptible (& FS_VCC (ATM_SKB(skb)->vcc)->close_wait);
+ FS_VCC (ATM_SKB(skb)->vcc)->last_skb = NULL;
+ }
+ td->dev->ntxpckts--;
+
+ {
+ static int c=0;
+
+ if (!(c++ % 100)) {
+ fs_dprintk (FS_DEBUG_QSIZE, "[%d]", td->dev->ntxpckts);
+ }
+ }
+
+ atomic_inc(&ATM_SKB(skb)->vcc->stats->tx);
+
+ fs_dprintk (FS_DEBUG_TXMEM, "i");
+ fs_dprintk (FS_DEBUG_ALLOC, "Free t-skb: %p\n", skb);
+ fs_kfree_skb (skb);
+
+ fs_dprintk (FS_DEBUG_ALLOC, "Free trans-d: %p\n", td);
+ memset (td, 0x12, sizeof (struct FS_BPENTRY));
+ kfree (td);
+ break;
+ default:
+ /* Here we get the tx purge inhibit command ... */
+ /* Action, I believe, is "don't do anything". -- REW */
+ }
+
+ write_fs (dev, Q_RP(q->offset), Q_INCWRAP);
+ }
+}
+
+
+void process_incoming (struct fs_dev *dev, struct queue *q)
+{
+ long rq;
+ struct FS_QENTRY *qe;
+ struct FS_BPENTRY *pe;
+ struct sk_buff *skb;
+ unsigned int channo;
+ struct atm_vcc *atm_vcc;
+
+ while (!((rq = read_fs (dev, Q_RP(q->offset))) & Q_EMPTY)) {
+ fs_dprintk (FS_DEBUG_QUEUE, "reaping incoming queue entry at %lx\n", rq);
+ qe = bus_to_virt (rq);
+
+ fs_dprintk (FS_DEBUG_QUEUE, "queue entry: %08x %08x %08x %08x. ",
+ qe->cmd, qe->p0, qe->p1, qe->p2);
+
+ fs_dprintk (FS_DEBUG_QUEUE, "-> %x: %s\n",
+ STATUS_CODE (qe),
+ res_strings[STATUS_CODE(qe)]);
+
+ pe = bus_to_virt (qe->p0);
+ fs_dprintk (FS_DEBUG_QUEUE, "Pool entry: %08x %08x %08x %08x %p %p.\n",
+ pe->flags, pe->next, pe->bsa, pe->aal_bufsize,
+ pe->skb, pe->fp);
+
+ channo = qe->cmd & 0xffff;
+
+ if (channo < dev->nchannels)
+ atm_vcc = dev->atm_vccs[channo];
+ else
+ atm_vcc = NULL;
+
+ /* Single buffer packet */
+ switch (STATUS_CODE (qe)) {
+ case 0x2:/* Packet received OK.... */
+ if (atm_vcc) {
+ skb = pe->skb;
+ pe->fp->n--;
+#if 0
+ fs_dprintk (FS_DEBUG_QUEUE, "Got skb: %p\n", skb);
+ if (FS_DEBUG_QUEUE & fs_debug) my_hd (bus_to_virt (pe->bsa), 0x20);
+#endif
+ skb_put (skb, qe->p1 & 0xffff);
+ ATM_SKB(skb)->vcc = atm_vcc;
+ atomic_inc(&atm_vcc->stats->rx);
+ skb->stamp = xtime;
+ fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p (pushed)\n", skb);
+ atm_vcc->push (atm_vcc, skb);
+ fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", pe);
+ kfree (pe);
+ } else {
+ printk (KERN_ERR "Got a receive on a non-open channel %d.\n", channo);
+ }
+ break;
+ case 0x17:/* AAL 5 CRC32 error. IFF the length field is nonzero, a buffer
+ has been consumed and needs to be processed. -- REW */
+ if (qe->p1 & 0xffff) {
+ pe = bus_to_virt (qe->p0);
+ pe->fp->n--;
+ fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", pe->skb);
+ dev_kfree_skb_any (pe->skb);
+ fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", pe);
+ kfree (pe);
+ }
+ if (atm_vcc)
+ atomic_inc(&atm_vcc->stats->rx_drop);
+ break;
+ case 0x1f: /* Reassembly abort: no buffers. */
+ /* Silently increment error counter. */
+ if (atm_vcc)
+ atomic_inc(&atm_vcc->stats->rx_drop);
+ break;
+ default: /* Hmm. Haven't written the code to handle the others yet... -- REW */
+ printk (KERN_WARNING "Don't know what to do with RX status %x: %s.\n",
+ STATUS_CODE(qe), res_strings[STATUS_CODE (qe)]);
+ }
+ write_fs (dev, Q_RP(q->offset), Q_INCWRAP);
+ }
+}
+
+
+
+#define DO_DIRECTION(tp) ((tp)->traffic_class != ATM_NONE)
+
+static int fs_open(struct atm_vcc *atm_vcc, short vpi, int vci)
+{
+ struct fs_dev *dev;
+ struct fs_vcc *vcc;
+ struct fs_transmit_config *tc;
+ struct atm_trafprm * txtp;
+ struct atm_trafprm * rxtp;
+ /* struct fs_receive_config *rc;*/
+ /* struct FS_QENTRY *qe; */
+ int error;
+ int bfp;
+ int to;
+ unsigned short tmc0;
+
+ func_enter ();
+
+ dev = FS_DEV(atm_vcc->dev);
+ fs_dprintk (FS_DEBUG_OPEN, "fs: open on dev: %p, vcc at %p\n",
+ dev, atm_vcc);
+
+ error = atm_find_ci(atm_vcc, &vpi, &vci);
+ if (error) {
+ fs_dprintk (FS_DEBUG_OPEN, "fs: find_ci failed.\n");
+ return error;
+ }
+
+ atm_vcc->vpi = vpi;
+ atm_vcc->vci = vci;
+ if (vci != ATM_VPI_UNSPEC && vpi != ATM_VCI_UNSPEC)
+ set_bit(ATM_VF_ADDR, &atm_vcc->flags);
+
+ if (atm_vcc->qos.aal != ATM_AAL5) return -EINVAL; /* XXX AAL0 */
+
+ fs_dprintk (FS_DEBUG_OPEN, "fs: (itf %d): open %d.%d\n",
+ atm_vcc->dev->number, atm_vcc->vpi, atm_vcc->vci);
+
+ /* XXX handle qos parameters (rate limiting) ? */
+
+ vcc = kmalloc(sizeof(struct fs_vcc), GFP_KERNEL);
+ fs_dprintk (FS_DEBUG_ALLOC, "Alloc VCC: %p(%d)\n", vcc, sizeof(struct fs_vcc));
+ if (!vcc) {
+ clear_bit(ATM_VF_ADDR, &atm_vcc->flags);
+ return -ENOMEM;
+ }
+
+ atm_vcc->dev_data = vcc;
+ vcc->last_skb = NULL;
+
+ init_waitqueue_head (&vcc->close_wait);
+
+ txtp = &atm_vcc->qos.txtp;
+ rxtp = &atm_vcc->qos.rxtp;
+
+ if (!test_bit(ATM_VF_PARTIAL, &atm_vcc->flags)) {
+ if (IS_FS50(dev)) {
+ /* Increment the channel numer: take a free one next time. */
+ for (to=33;to;to--, dev->channo++) {
+ /* If we need to do RX, AND the RX is inuse, try the next */
+ if (DO_DIRECTION(rxtp) && dev->atm_vccs[dev->channo])
+ continue;
+ /* If we need to do TX, AND the TX is inuse, try the next */
+ if (DO_DIRECTION(txtp) && test_bit (dev->channo, dev->tx_inuse))
+ continue;
+ /* Ok, both are free! (or not needed) */
+ break;
+ }
+ if (!to) {
+ printk ("No more free channels for FS50..\n");
+ return -EBUSY;
+ }
+ vcc->channo = dev->channo;
+ dev->channo &= dev->channel_mask;
+
+ } else {
+ vcc->channo = (vpi << FS155_VCI_BITS) | (vci);
+ if (((DO_DIRECTION(rxtp) && dev->atm_vccs[vcc->channo])) ||
+ ( DO_DIRECTION(txtp) && test_bit (vcc->channo, dev->tx_inuse))) {
+ printk ("Channel is in use for FS155.\n");
+ return -EBUSY;
+ }
+ }
+ fs_dprintk (FS_DEBUG_OPEN, "OK. Allocated channel %x(%d).\n",
+ vcc->channo, vcc->channo);
+ }
+
+ if (DO_DIRECTION (txtp)) {
+ tc = kmalloc (sizeof (struct fs_transmit_config), GFP_KERNEL);
+ fs_dprintk (FS_DEBUG_ALLOC, "Alloc tc: %p(%d)\n",
+ tc, sizeof (struct fs_transmit_config));
+ if (!tc) {
+ fs_dprintk (FS_DEBUG_OPEN, "fs: can't alloc transmit_config.\n");
+ return -ENOMEM;
+ }
+
+ /* Allocate the "open" entry from the high priority txq. This makes
+ it most likely that the chip will notice it. It also prevents us
+ from having to wait for completion. On the other hand, we may
+ need to wait for completion anyway, to see if it completed
+ succesfully. */
+
+ tc->flags = 0
+ | TC_FLAGS_AAL5
+ | TC_FLAGS_PACKET /* ??? */
+ | TC_FLAGS_TYPE_CBR
+ | TC_FLAGS_CAL0;
+
+ /* Docs are vague about this atm_hdr field. By the way, the FS
+ * chip makes odd errors if lower bits are set.... -- REW */
+ tc->atm_hdr = (vpi << 20) | (vci << 4);
+ {
+ int pcr = atm_pcr_goal (txtp);
+
+ fs_dprintk (FS_DEBUG_OPEN, "pcr = %d.\n", pcr);
+
+ /* XXX Hmm. officially we're only allowed to do this if rounding
+ is round_down -- REW */
+ if (IS_FS50(dev)) {
+ if (pcr > 51840000/53/8) pcr = 51840000/53/8;
+ } else {
+ if (pcr > 155520000/53/8) pcr = 155520000/53/8;
+ }
+ if (!pcr) {
+ /* no rate cap */
+ tmc0 = IS_FS50(dev)?0x61BE:0x64c9; /* Just copied over the bits from Fujitsu -- REW */
+ } else {
+ int r;
+ if (pcr < 0) {
+ r = ROUND_DOWN;
+ pcr = -pcr;
+ } else {
+ r = ROUND_UP;
+ }
+ error = make_rate (pcr, r, &tmc0, 0);
+ }
+ fs_dprintk (FS_DEBUG_OPEN, "pcr = %d.\n", pcr);
+ }
+
+ tc->TMC[0] = tmc0 | 0x4000;
+ tc->TMC[1] = 0; /* Unused */
+ tc->TMC[2] = 0; /* Unused */
+ tc->TMC[3] = 0; /* Unused */
+
+ tc->spec = 0; /* UTOPIA address, UDF, HEC: Unused -> 0 */
+ tc->rtag[0] = 0; /* What should I do with routing tags???
+ -- Not used -- AS -- Thanks -- REW*/
+ tc->rtag[1] = 0;
+ tc->rtag[2] = 0;
+
+ if (fs_debug & FS_DEBUG_OPEN) {
+ fs_dprintk (FS_DEBUG_OPEN, "TX config record:\n");
+ my_hd (tc, sizeof (*tc));
+ }
+
+ /* We now use the "submit_command" function to submit commands to
+ the firestream. There is a define up near the definition of
+ that routine that switches this routine between immediate write
+ to the immediate comamnd registers and queuing the commands in
+ the HPTXQ for execution. This last technique might be more
+ efficient if we know we're going to submit a whole lot of
+ commands in one go, but this driver is not setup to be able to
+ use such a construct. So it probably doen't matter much right
+ now. -- REW */
+
+ /* The command is IMMediate and INQueue. The parameters are out-of-line.. */
+ submit_command (dev, &dev->hp_txq,
+ QE_CMD_CONFIG_TX | QE_CMD_IMM_INQ | vcc->channo,
+ virt_to_bus (tc), 0, 0);
+
+ submit_command (dev, &dev->hp_txq,
+ QE_CMD_TX_EN | QE_CMD_IMM_INQ | vcc->channo,
+ 0, 0, 0);
+ set_bit (vcc->channo, dev->tx_inuse);
+ }
+
+ if (DO_DIRECTION (rxtp)) {
+ dev->atm_vccs[vcc->channo] = atm_vcc;
+
+ for (bfp = 0;bfp < FS_NR_FREE_POOLS; bfp++)
+ if (atm_vcc->qos.rxtp.max_sdu <= dev->rx_fp[bfp].bufsize) break;
+
+ if (bfp >= FS_NR_FREE_POOLS) {
+ fs_dprintk (FS_DEBUG_OPEN, "No free pool fits sdu: %d.\n",
+ atm_vcc->qos.rxtp.max_sdu);
+ /* XXX Cleanup? -- Would just calling fs_close work??? -- REW */
+
+ /* XXX clear tx inuse. Close TX part? */
+ dev->atm_vccs[vcc->channo] = NULL;
+ kfree (vcc);
+ return -EINVAL;
+ }
+
+ submit_command (dev, &dev->hp_txq,
+ QE_CMD_CONFIG_RX | QE_CMD_IMM_INQ | vcc->channo,
+ RC_FLAGS_AAL5 |
+ RC_FLAGS_BFPS_BFP * bfp |
+ RC_FLAGS_RXBM_PSB, 0, 0);
+
+ if (IS_FS50 (dev)) {
+ submit_command (dev, &dev->hp_txq,
+ QE_CMD_REG_WR | QE_CMD_IMM_INQ,
+ 0x80 + vcc->channo,
+ (vpi << 16) | vci, 0 ); /* XXX -- Use defines. */
+ }
+ submit_command (dev, &dev->hp_txq,
+ QE_CMD_RX_EN | QE_CMD_IMM_INQ | vcc->channo,
+ 0, 0, 0);
+ }
+
+ /* Indicate we're done! */
+ set_bit(ATM_VF_READY, &atm_vcc->flags);
+
+ func_exit ();
+ return 0;
+}
+
+
+static void fs_close(struct atm_vcc *atm_vcc)
+{
+ struct fs_dev *dev = FS_DEV (atm_vcc->dev);
+ struct fs_vcc *vcc = FS_VCC (atm_vcc);
+ struct atm_trafprm * txtp;
+ struct atm_trafprm * rxtp;
+
+ func_enter ();
+
+ clear_bit(ATM_VF_READY, &atm_vcc->flags);
+
+ fs_dprintk (FS_DEBUG_QSIZE, "--==**[%d]**==--", dev->ntxpckts);
+ if (vcc->last_skb) {
+ fs_dprintk (FS_DEBUG_QUEUE, "Waiting for skb %p to be sent.\n",
+ vcc->last_skb);
+ /* We're going to wait for the last packet to get sent on this VC. It would
+ be impolite not to send them don't you think?
+ XXX
+ We don't know which packets didn't get sent. So if we get interrupted in
+ this sleep_on, we'll lose any reference to these packets. Memory leak!
+ On the other hand, it's awfully convenient that we can abort a "close" that
+ is taking too long. Maybe just use non-interruptible sleep on? -- REW */
+ interruptible_sleep_on (& vcc->close_wait);
+ }
+
+ txtp = &atm_vcc->qos.txtp;
+ rxtp = &atm_vcc->qos.rxtp;
+
+
+ /* See App note XXX (Unpublished as of now) for the reason for the
+ removal of the "CMD_IMM_INQ" part of the TX_PURGE_INH... -- REW */
+
+ if (DO_DIRECTION (txtp)) {
+ submit_command (dev, &dev->hp_txq,
+ QE_CMD_TX_PURGE_INH | /*QE_CMD_IMM_INQ|*/ vcc->channo, 0,0,0);
+ clear_bit (vcc->channo, dev->tx_inuse);
+ }
+
+ if (DO_DIRECTION (rxtp)) {
+ submit_command (dev, &dev->hp_txq,
+ QE_CMD_RX_PURGE_INH | QE_CMD_IMM_INQ | vcc->channo, 0,0,0);
+ dev->atm_vccs [vcc->channo] = NULL;
+
+ /* This means that this is configured as a receive channel */
+ if (IS_FS50 (dev)) {
+ /* Disable the receive filter. Is 0/0 indeed an invalid receive
+ channel? -- REW. Yes it is. -- Hang. Ok. I'll use -1
+ (0xfff...) -- REW */
+ submit_command (dev, &dev->hp_txq,
+ QE_CMD_REG_WR | QE_CMD_IMM_INQ,
+ 0x80 + vcc->channo, -1, 0 );
+ }
+ }
+
+ fs_dprintk (FS_DEBUG_ALLOC, "Free vcc: %p\n", vcc);
+ kfree (vcc);
+
+ func_exit ();
+}
+
+
+static int fs_send (struct atm_vcc *atm_vcc, struct sk_buff *skb)
+{
+ struct fs_dev *dev = FS_DEV (atm_vcc->dev);
+ struct fs_vcc *vcc = FS_VCC (atm_vcc);
+ struct FS_BPENTRY *td;
+
+ func_enter ();
+
+ fs_dprintk (FS_DEBUG_TXMEM, "I");
+ fs_dprintk (FS_DEBUG_SEND, "Send: atm_vcc %p skb %p vcc %p dev %p\n",
+ atm_vcc, skb, vcc, dev);
+
+ fs_dprintk (FS_DEBUG_ALLOC, "Alloc t-skb: %p (atm_send)\n", skb);
+
+ ATM_SKB(skb)->vcc = atm_vcc;
+
+ vcc->last_skb = skb;
+
+ td = kmalloc (sizeof (struct FS_BPENTRY), GFP_ATOMIC);
+ fs_dprintk (FS_DEBUG_ALLOC, "Alloc transd: %p(%d)\n", td, sizeof (struct FS_BPENTRY));
+ if (!td) {
+ /* Oops out of mem */
+ return -ENOMEM;
+ }
+
+ fs_dprintk (FS_DEBUG_SEND, "first word in buffer: %x\n",
+ *(int *) skb->data);
+
+ td->flags = TD_EPI | TD_DATA | skb->len;
+ td->next = 0;
+ td->bsa = virt_to_bus (skb->data);
+ td->skb = skb;
+ td->dev = dev;
+ dev->ntxpckts++;
+
+ da[qd] = td;
+ dq[qd].flags = td->flags;
+ dq[qd].next = td->next;
+ dq[qd].bsa = td->bsa;
+ dq[qd].skb = td->skb;
+ dq[qd].dev = td->dev;
+ qd++;
+ if (qd >= 60) qd = 0;
+
+ submit_queue (dev, &dev->hp_txq,
+ QE_TRANSMIT_DE | vcc->channo,
+ virt_to_bus (td), 0,
+ virt_to_bus (td));
+
+ fs_dprintk (FS_DEBUG_QUEUE, "in send: txq %d txrq %d\n",
+ read_fs (dev, Q_EA (dev->hp_txq.offset)) -
+ read_fs (dev, Q_SA (dev->hp_txq.offset)),
+ read_fs (dev, Q_EA (dev->tx_relq.offset)) -
+ read_fs (dev, Q_SA (dev->tx_relq.offset)));
+
+ func_exit ();
+ return 0;
+}
+
+
+/* Some function placeholders for functions we don't yet support. */
+
+#if 0
+static int fs_ioctl(struct atm_dev *dev,unsigned int cmd,void *arg)
+{
+ func_enter ();
+ func_exit ();
+ return 0;
+}
+
+
+static int fs_getsockopt(struct atm_vcc *vcc,int level,int optname,
+ void *optval,int optlen)
+{
+ func_enter ();
+ func_exit ();
+ return 0;
+}
+
+
+static int fs_setsockopt(struct atm_vcc *vcc,int level,int optname,
+ void *optval,int optlen)
+{
+ func_enter ();
+ func_exit ();
+ return 0;
+}
+
+
+static void fs_phy_put(struct atm_dev *dev,unsigned char value,
+ unsigned long addr)
+{
+ func_enter ();
+ func_exit ();
+}
+
+
+static unsigned char fs_phy_get(struct atm_dev *dev,unsigned long addr)
+{
+ func_enter ();
+ func_exit ();
+ return 0;
+}
+
+
+static void fs_feedback(struct atm_vcc *vcc,struct sk_buff *skb,
+ unsigned long start,unsigned long dest,int len)
+{
+ func_enter ();
+ func_exit ();
+}
+
+
+static int fs_change_qos(struct atm_vcc *vcc,struct atm_qos *qos,int flags)
+{
+ func_enter ();
+ func_exit ();
+ return 0;
+};
+
+#endif
+
+
+static const struct atmdev_ops ops = {
+ open: fs_open,
+ close: fs_close,
+ send: fs_send,
+ owner: THIS_MODULE,
+
+ /* fs_sg_send */
+ /* ioctl: fs_ioctl, */
+ /* getsockopt: fs_getsockopt, */
+ /* setsockopt: fs_setsockopt, */
+ /* feedback: fs_feedback, */
+ /* change_qos: fs_change_qos, */
+
+ /* For now implement these internally here... */
+ /* phy_put: fs_phy_put, */
+ /* phy_get: fs_phy_get, */
+};
+
+
+
+void undocumented_pci_fix (struct pci_dev *pdev)
+{
+ int tint;
+
+ /* The Windows driver says: */
+ /* Switch off FireStream Retry Limit Threshold
+ */
+
+ /* The register at 0x28 is documented as "reserved", no further
+ comments. */
+
+ pci_read_config_dword (pdev, 0x28, &tint);
+ if (tint != 0x80) {
+ tint = 0x80;
+ pci_write_config_dword (pdev, 0x28, tint);
+ }
+}
+
+
+
+/**************************************************************************
+ * PHY routines *
+ **************************************************************************/
+
+
+
+
+void write_phy (struct fs_dev *dev, int regnum, int val)
+{
+ submit_command (dev, &dev->hp_txq, QE_CMD_PRP_WR | QE_CMD_IMM_INQ,
+ regnum, val, 0);
+}
+
+
+
+int init_phy (struct fs_dev *dev, struct reginit_item *reginit)
+{
+ int i;
+
+ func_enter ();
+ while (reginit->reg != PHY_EOF) {
+ if (reginit->reg == PHY_CLEARALL) {
+ /* "PHY_CLEARALL means clear all registers. Numregisters is in "val". */
+ for (i=0;i<reginit->val;i++) {
+ write_phy (dev, i, 0);
+ }
+ } else {
+ write_phy (dev, reginit->reg, reginit->val);
+ }
+ reginit++;
+ }
+ func_exit ();
+ return 0;
+}
+
+
+
+void reset_chip (struct fs_dev *dev)
+{
+ int i;
+
+ write_fs (dev, SARMODE0, SARMODE0_SRTS0);
+
+ /* Undocumented delay */
+ udelay (128);
+
+ /* The "internal registers are documented to all reset to zero, but
+ comments & code in the Windows driver indicates that the pools are
+ NOT reset. */
+ for (i=0;i < FS_NR_FREE_POOLS;i++) {
+ write_fs (dev, FP_CNF (RXB_FP(i)), 0);
+ write_fs (dev, FP_SA (RXB_FP(i)), 0);
+ write_fs (dev, FP_EA (RXB_FP(i)), 0);
+ write_fs (dev, FP_CNT (RXB_FP(i)), 0);
+ write_fs (dev, FP_CTU (RXB_FP(i)), 0);
+ }
+
+ /* The same goes for the match channel registers, although those are
+ NOT documented that way in the Windows driver. -- REW */
+ /* The Windows driver DOES write 0 to these registers somewhere in
+ the init sequence. However, a small hardware-feature, will
+ prevent reception of data on VPI/VCI = 0/0 (Unless the channel
+ allocated happens to have no disabled channels that have a lower
+ number. -- REW */
+
+ /* Clear the match channel registers. */
+ if (IS_FS50 (dev)) {
+ for (i=0;i<FS50_NR_CHANNELS;i++) {
+ write_fs (dev, 0x200 + i * 4, -1);
+ }
+ }
+}
+
+
+
+void *aligned_kmalloc (int size, int flags, int alignment)
+{
+ void *t;
+
+ if (alignment <= 0x10) {
+ t = kmalloc (size, flags);
+ if ((unsigned int)t & (alignment-1)) {
+ printk ("Kmalloc doesn't align things correctly! %p\n", t);
+ kfree (t);
+ return aligned_kmalloc (size, flags, alignment * 4);
+ }
+ return t;
+ }
+ printk (KERN_ERR "Request for > 0x10 alignment not yet implemented (hard!)\n");
+ return NULL;
+}
+
+
+int init_q (struct fs_dev *dev,
+ struct queue *txq, int queue, int nentries, int is_rq)
+{
+ int sz = nentries * sizeof (struct FS_QENTRY);
+ struct FS_QENTRY *p;
+
+ func_enter ();
+
+ fs_dprintk (FS_DEBUG_INIT, "Inititing queue at %x: %d entries:\n",
+ queue, nentries);
+
+ p = aligned_kmalloc (sz, GFP_KERNEL, 0x10);
+ fs_dprintk (FS_DEBUG_ALLOC, "Alloc queue: %p(%d)\n", p, sz);
+
+ if (!p) return 0;
+
+ write_fs (dev, Q_SA(queue), virt_to_bus(p));
+ write_fs (dev, Q_EA(queue), virt_to_bus(p+nentries-1));
+ write_fs (dev, Q_WP(queue), virt_to_bus(p));
+ write_fs (dev, Q_RP(queue), virt_to_bus(p));
+ if (is_rq) {
+ /* Configuration for the receive queue: 0: interrupt immediately,
+ no pre-warning to empty queues: We do our best to keep the
+ queue filled anyway. */
+ write_fs (dev, Q_CNF(queue), 0 );
+ }
+
+ txq->sa = p;
+ txq->ea = p;
+ txq->offset = queue;
+
+ func_exit ();
+ return 1;
+}
+
+
+int init_fp (struct fs_dev *dev,
+ struct freepool *fp, int queue, int bufsize, int nr_buffers)
+{
+ func_enter ();
+
+ fs_dprintk (FS_DEBUG_INIT, "Inititing free pool at %x:\n", queue);
+
+ write_fs (dev, FP_CNF(queue), (bufsize * RBFP_RBS) | RBFP_RBSVAL | RBFP_CME);
+ write_fs (dev, FP_SA(queue), 0);
+ write_fs (dev, FP_EA(queue), 0);
+ write_fs (dev, FP_CTU(queue), 0);
+ write_fs (dev, FP_CNT(queue), 0);
+
+ fp->offset = queue;
+ fp->bufsize = bufsize;
+ fp->nr_buffers = nr_buffers;
+
+ func_exit ();
+ return 1;
+}
+
+
+static inline int nr_buffers_in_freepool (struct fs_dev *dev, struct freepool *fp)
+{
+#if 0
+ /* This seems to be unreliable.... */
+ return read_fs (dev, FP_CNT (fp->offset));
+#else
+ return fp->n;
+#endif
+}
+
+
+/* Check if this gets going again if a pool ever runs out. -- Yes, it
+ does. I've seen "recieve abort: no buffers" and things started
+ working again after that... -- REW */
+
+void top_off_fp (struct fs_dev *dev, struct freepool *fp, int gfp_flags)
+{
+ struct FS_BPENTRY *qe, *ne;
+ struct sk_buff *skb;
+ int n = 0;
+
+ fs_dprintk (FS_DEBUG_QUEUE, "Topping off queue at %x (%d-%d/%d)\n",
+ fp->offset, read_fs (dev, FP_CNT (fp->offset)), fp->n,
+ fp->nr_buffers);
+ while (nr_buffers_in_freepool(dev, fp) < fp->nr_buffers) {
+
+ skb = alloc_skb (fp->bufsize, gfp_flags);
+ fs_dprintk (FS_DEBUG_ALLOC, "Alloc rec-skb: %p(%d)\n", skb, fp->bufsize);
+ if (!skb) break;
+ ne = kmalloc (sizeof (struct FS_BPENTRY), gfp_flags);
+ fs_dprintk (FS_DEBUG_ALLOC, "Alloc rec-d: %p(%d)\n", ne, sizeof (struct FS_BPENTRY));
+ if (!ne) {
+ fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", skb);
+ dev_kfree_skb_any (skb);
+ break;
+ }
+
+ fs_dprintk (FS_DEBUG_QUEUE, "Adding skb %p desc %p -> %p(%p) ",
+ skb, ne, skb->data, skb->head);
+ n++;
+ ne->flags = FP_FLAGS_EPI | fp->bufsize;
+ ne->next = virt_to_bus (NULL);
+ ne->bsa = virt_to_bus (skb->data);
+ ne->aal_bufsize = fp->bufsize;
+ ne->skb = skb;
+ ne->fp = fp;
+
+ qe = (struct FS_BPENTRY *) (read_fs (dev, FP_EA(fp->offset)));
+ fs_dprintk (FS_DEBUG_QUEUE, "link at %p\n", qe);
+ if (qe) {
+ qe = bus_to_virt ((long) qe);
+ qe->next = virt_to_bus(ne);
+ qe->flags &= ~FP_FLAGS_EPI;
+ } else
+ write_fs (dev, FP_SA(fp->offset), virt_to_bus(ne));
+
+ write_fs (dev, FP_EA(fp->offset), virt_to_bus (ne));
+ fp->n++; /* XXX Atomic_inc? */
+ write_fs (dev, FP_CTU(fp->offset), 1);
+ }
+
+ fs_dprintk (FS_DEBUG_QUEUE, "Added %d entries. \n", n);
+}
+
+
+void free_queue (struct fs_dev *dev, struct queue *txq)
+{
+ func_enter ();
+
+ write_fs (dev, Q_SA(txq->offset), 0);
+ write_fs (dev, Q_EA(txq->offset), 0);
+ write_fs (dev, Q_RP(txq->offset), 0);
+ write_fs (dev, Q_WP(txq->offset), 0);
+ /* Configuration ? */
+
+ fs_dprintk (FS_DEBUG_ALLOC, "Free queue: %p\n", txq->sa);
+ kfree (txq->sa);
+
+ func_exit ();
+}
+
+
+void free_freepool (struct fs_dev *dev, struct freepool *fp)
+{
+ func_enter ();
+
+ write_fs (dev, FP_CNF(fp->offset), 0);
+ write_fs (dev, FP_SA (fp->offset), 0);
+ write_fs (dev, FP_EA (fp->offset), 0);
+ write_fs (dev, FP_CNT(fp->offset), 0);
+ write_fs (dev, FP_CTU(fp->offset), 0);
+
+ func_exit ();
+}
+
+
+
+void fs_irq (int irq, void *dev_id, struct pt_regs * pt_regs)
+{
+ int i;
+ u32 status;
+ struct fs_dev *dev = dev_id;
+
+ status = read_fs (dev, ISR);
+ if (!status) return;
+
+ func_enter ();
+
+#ifdef IRQ_RATE_LIMIT
+ /* Aaargh! I'm ashamed. This costs more lines-of-code than the actual
+ interrupt routine!. (Well, used to when I wrote that comment) -- REW */
+ {
+ static int lastjif;
+ static int nintr=0;
+
+ if (lastjif == jiffies) {
+ if (++nintr > IRQ_RATE_LIMIT) {
+ free_irq (dev->irq, dev_id);
+ printk (KERN_ERR "fs: Too many interrupts. Turning off interrupt %d.\n",
+ dev->irq);
+ }
+ } else {
+ lastjif = jiffies;
+ nintr = 0;
+ }
+ }
+#endif
+ fs_dprintk (FS_DEBUG_QUEUE, "in intr: txq %d txrq %d\n",
+ read_fs (dev, Q_EA (dev->hp_txq.offset)) -
+ read_fs (dev, Q_SA (dev->hp_txq.offset)),
+ read_fs (dev, Q_EA (dev->tx_relq.offset)) -
+ read_fs (dev, Q_SA (dev->tx_relq.offset)));
+
+ /* print the bits in the ISR register. */
+ if (fs_debug & FS_DEBUG_IRQ) {
+ /* The FS_DEBUG things are unneccesary here. But this way it is
+ clear for grep that these are debug prints. */
+ fs_dprintk (FS_DEBUG_IRQ, "IRQ status:");
+ for (i=0;i<27;i++)
+ if (status & (1 << i))
+ fs_dprintk (FS_DEBUG_IRQ, " %s", irq_bitname[i]);
+ fs_dprintk (FS_DEBUG_IRQ, "\n");
+ }
+
+ if (status & ISR_RBRQ0_W) {
+ fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (0)!!!!\n");
+ process_incoming (dev, &dev->rx_rq[0]);
+ /* items mentioned on RBRQ0 are from FP 0 or 1. */
+ top_off_fp (dev, &dev->rx_fp[0], GFP_ATOMIC);
+ top_off_fp (dev, &dev->rx_fp[1], GFP_ATOMIC);
+ }
+
+ if (status & ISR_RBRQ1_W) {
+ fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (1)!!!!\n");
+ process_incoming (dev, &dev->rx_rq[1]);
+ top_off_fp (dev, &dev->rx_fp[2], GFP_ATOMIC);
+ top_off_fp (dev, &dev->rx_fp[3], GFP_ATOMIC);
+ }
+
+ if (status & ISR_RBRQ2_W) {
+ fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (2)!!!!\n");
+ process_incoming (dev, &dev->rx_rq[2]);
+ top_off_fp (dev, &dev->rx_fp[4], GFP_ATOMIC);
+ top_off_fp (dev, &dev->rx_fp[5], GFP_ATOMIC);
+ }
+
+ if (status & ISR_RBRQ3_W) {
+ fs_dprintk (FS_DEBUG_IRQ, "Iiiin-coming (3)!!!!\n");
+ process_incoming (dev, &dev->rx_rq[3]);
+ top_off_fp (dev, &dev->rx_fp[6], GFP_ATOMIC);
+ top_off_fp (dev, &dev->rx_fp[7], GFP_ATOMIC);
+ }
+
+ if (status & ISR_CSQ_W) {
+ fs_dprintk (FS_DEBUG_IRQ, "Command executed ok!\n");
+ process_return_queue (dev, &dev->st_q);
+ }
+
+ if (status & ISR_TBRQ_W) {
+ fs_dprintk (FS_DEBUG_IRQ, "Data tramsitted!\n");
+ process_txdone_queue (dev, &dev->tx_relq);
+ }
+
+ func_exit ();
+}
+
+
+#ifdef FS_POLL_FREQ
+static void fs_poll (unsigned long data)
+{
+ struct fs_dev *dev = (struct fs_dev *) data;
+
+ fs_irq (0, dev, NULL);
+ dev->timer.expires = jiffies + FS_POLL_FREQ;
+ add_timer (&dev->timer);
+}
+#endif
+
+
+
+int __init fs_init (struct fs_dev *dev)
+{
+ struct pci_dev *pci_dev;
+ int isr, to;
+ int i;
+
+ func_enter ();
+ pci_dev = dev->pci_dev;
+
+ printk (KERN_INFO "found a FireStream %d card, base %08lx, irq%d.\n",
+ IS_FS50(dev)?50:155,
+ pci_resource_start(pci_dev, 0), dev->pci_dev->irq);
+
+ if (fs_debug & FS_DEBUG_INIT)
+ my_hd ((unsigned char *) dev, sizeof (*dev));
+
+ undocumented_pci_fix (pci_dev);
+
+ dev->hw_base = pci_resource_start(pci_dev, 0);
+
+ dev->base = (ulong) ioremap(dev->hw_base, 0x1000);
+
+ reset_chip (dev);
+
+ write_fs (dev, SARMODE0, 0
+ | (0 * SARMODE0_SHADEN) /* We don't use shadow registers. */
+ | (1 * SARMODE0_INTMODE_READCLEAR)
+ | (1 * SARMODE0_CWRE)
+ | IS_FS50(dev)?SARMODE0_PRPWT_FS50_5:
+ SARMODE0_PRPWT_FS155_3
+ | (1 * SARMODE0_CALSUP_1)
+ | IS_FS50 (dev)?(0
+ | SARMODE0_RXVCS_32
+ | SARMODE0_ABRVCS_32
+ | SARMODE0_TXVCS_32):
+ (0
+ | SARMODE0_RXVCS_1k
+ | SARMODE0_ABRVCS_1k
+ | SARMODE0_TXVCS_1k));
+
+ /* 10ms * 100 is 1 second. That should be enough, as AN3:9 says it takes
+ 1ms. */
+ to = 100;
+ while (--to) {
+ isr = read_fs (dev, ISR);
+
+ /* This bit is documented as "RESERVED" */
+ if (isr & ISR_INIT_ERR) {
+ printk (KERN_ERR "Error initializing the FS... \n");
+ return 1;
+ }
+ if (isr & ISR_INIT) {
+ fs_dprintk (FS_DEBUG_INIT, "Ha! Initialized OK!\n");
+ break;
+ }
+
+ /* Try again after 100ms. */
+ current->state = TASK_UNINTERRUPTIBLE;
+ schedule_timeout ((HZ+99)/100);
+ }
+
+ if (!to) {
+ printk (KERN_ERR "timeout initializing the FS... \n");
+ return 1;
+ }
+
+ /* XXX fix for fs155 */
+ dev->channel_mask = 0x1f;
+ dev->channo = 0;
+
+ /* AN3: 10 */
+ write_fs (dev, SARMODE1, 0
+ | (0 * SARMODE1_DEFHEC) /* XXX PHY */
+ | ((loopback == 1) * SARMODE1_TSTLP) /* XXX Loopback mode enable... */
+ | (1 * SARMODE1_DCRM)
+ | (1 * SARMODE1_DCOAM)
+ | (0 * SARMODE1_OAMCRC)
+ | (0 * SARMODE1_DUMPE)
+ | (0 * SARMODE1_GPLEN)
+ | (0 * SARMODE1_GNAM)
+ | (0 * SARMODE1_GVAS)
+ | (0 * SARMODE1_GPAS)
+ | (1 * SARMODE1_GPRI)
+ | (0 * SARMODE1_PMS)
+ | (0 * SARMODE1_GFCR)
+ | (1 * SARMODE1_HECM2)
+ | (1 * SARMODE1_HECM1)
+ | (1 * SARMODE1_HECM0)
+ | (1 << 12) /* That's what hang's driver does. Program to 0 */
+ | (0 * 0xff) /* XXX FS155 */);
+
+
+ /* Cal prescale etc */
+
+ /* AN3: 11 */
+ write_fs (dev, TMCONF, 0x0000000f);
+ write_fs (dev, CALPRESCALE, 0x01010101 * num);
+ write_fs (dev, 0x80, 0x000F00E4);
+
+ /* AN3: 12 */
+ write_fs (dev, CELLOSCONF, 0
+ | ( 0 * CELLOSCONF_CEN)
+ | ( CELLOSCONF_SC1)
+ | (0x80 * CELLOSCONF_COBS)
+ | (num * CELLOSCONF_COPK) /* Changed from 0xff to 0x5a */
+ | (num * CELLOSCONF_COST));/* after a hint from Hang.
+ * performance jumped 50->70... */
+
+ /* Magic value by Hang */
+ write_fs (dev, CELLOSCONF_COST, 0x0B809191);
+
+ if (IS_FS50 (dev)) {
+ write_fs (dev, RAS0, RAS0_DCD_XHLT);
+ dev->atm_dev->ci_range.vpi_bits = 12;
+ dev->atm_dev->ci_range.vci_bits = 16;
+ dev->nchannels = FS50_NR_CHANNELS;
+ } else {
+ write_fs (dev, RAS0, RAS0_DCD_XHLT
+ | (((1 << FS155_VPI_BITS) - 1) * RAS0_VPSEL)
+ | (((1 << FS155_VCI_BITS) - 1) * RAS0_VCSEL));
+ /* We can chose the split arbitarily. We might be able to
+ support more. Whatever. This should do for now. */
+ dev->atm_dev->ci_range.vpi_bits = FS155_VPI_BITS;
+ dev->atm_dev->ci_range.vci_bits = FS155_VCI_BITS;
+
+ /* Address bits we can't use should be compared to 0. */
+ write_fs (dev, RAC, 0);
+
+ /* Manual (AN9, page 6) says ASF1=0 means compare Utopia address
+ * too. I can't find ASF1 anywhere. Anyway, we AND with just hte
+ * other bits, then compare with 0, which is exactly what we
+ * want. */
+ write_fs (dev, RAM, (1 << (28 - FS155_VPI_BITS - FS155_VCI_BITS)) - 1);
+ dev->nchannels = FS155_NR_CHANNELS;
+ }
+ dev->atm_vccs = kmalloc (dev->nchannels * sizeof (struct atm_vcc *),
+ GFP_KERNEL);
+ fs_dprintk (FS_DEBUG_ALLOC, "Alloc atmvccs: %p(%d)\n",
+ dev->atm_vccs, dev->nchannels * sizeof (struct atm_vcc *));
+
+ if (!dev->atm_vccs) {
+ printk (KERN_WARNING "Couldn't allocate memory for VCC buffers. Woops!\n");
+ /* XXX Clean up..... */
+ return 1;
+ }
+ memset (dev->atm_vccs, 0, dev->nchannels * sizeof (struct atm_vcc *));
+
+ dev->tx_inuse = kmalloc (dev->nchannels / 8 /* bits/byte */ , GFP_KERNEL);
+ fs_dprintk (FS_DEBUG_ALLOC, "Alloc tx_inuse: %p(%d)\n",
+ dev->atm_vccs, dev->nchannels / 8);
+
+ if (!dev->tx_inuse) {
+ printk (KERN_WARNING "Couldn't allocate memory for tx_inuse bits!\n");
+ /* XXX Clean up..... */
+ return 1;
+ }
+ memset (dev->tx_inuse, 0, dev->nchannels / 8);
+
+ /* -- RAS1 : FS155 and 50 differ. Default (0) should be OK for both */
+ /* -- RAS2 : FS50 only: Default is OK. */
+
+ /* DMAMODE, default should be OK. -- REW */
+ write_fs (dev, DMAMR, DMAMR_TX_MODE_FULL);
+
+ init_q (dev, &dev->hp_txq, TX_PQ(TXQ_HP), TXQ_NENTRIES, 0);
+ init_q (dev, &dev->lp_txq, TX_PQ(TXQ_LP), TXQ_NENTRIES, 0);
+ init_q (dev, &dev->tx_relq, TXB_RQ, TXQ_NENTRIES, 1);
+ init_q (dev, &dev->st_q, ST_Q, TXQ_NENTRIES, 1);
+
+ for (i=0;i < FS_NR_FREE_POOLS;i++) {
+ init_fp (dev, &dev->rx_fp[i], RXB_FP(i),
+ rx_buf_sizes[i], rx_pool_sizes[i]);
+ top_off_fp (dev, &dev->rx_fp[i], GFP_KERNEL);
+ }
+
+
+ for (i=0;i < FS_NR_RX_QUEUES;i++)
+ init_q (dev, &dev->rx_rq[i], RXB_RQ(i), RXRQ_NENTRIES, 1);
+
+ dev->irq = pci_dev->irq;
+ if (request_irq (dev->irq, fs_irq, SA_SHIRQ, "firestream", dev)) {
+ printk (KERN_WARNING "couldn't get irq %d for firestream.\n", pci_dev->irq);
+ /* XXX undo all previous stuff... */
+ return 1;
+ }
+ fs_dprintk (FS_DEBUG_INIT, "Grabbed irq %d for dev at %p.\n", dev->irq, dev);
+
+ /* We want to be notified of most things. Just the statistics count
+ overflows are not interesting */
+ write_fs (dev, IMR, 0
+ | ISR_RBRQ0_W
+ | ISR_RBRQ1_W
+ | ISR_RBRQ2_W
+ | ISR_RBRQ3_W
+ | ISR_TBRQ_W
+ | ISR_CSQ_W);
+
+ write_fs (dev, SARMODE0, 0
+ | (0 * SARMODE0_SHADEN) /* We don't use shadow registers. */
+ | (1 * SARMODE0_GINT)
+ | (1 * SARMODE0_INTMODE_READCLEAR)
+ | (0 * SARMODE0_CWRE)
+ | (IS_FS50(dev)?SARMODE0_PRPWT_FS50_5:
+ SARMODE0_PRPWT_FS155_3)
+ | (1 * SARMODE0_CALSUP_1)
+ | (IS_FS50 (dev)?(0
+ | SARMODE0_RXVCS_32
+ | SARMODE0_ABRVCS_32
+ | SARMODE0_TXVCS_32):
+ (0
+ | SARMODE0_RXVCS_1k
+ | SARMODE0_ABRVCS_1k
+ | SARMODE0_TXVCS_1k))
+ | (1 * SARMODE0_RUN));
+
+ init_phy (dev, PHY_NTC_INIT);
+
+ if (loopback == 2) {
+ write_phy (dev, 0x39, 0x000e);
+ }
+
+#ifdef FS_POLL_FREQ
+ init_timer (&dev->timer);
+ dev->timer.data = (unsigned long) dev;
+ dev->timer.function = fs_poll;
+ dev->timer.expires = jiffies + FS_POLL_FREQ;
+ add_timer (&dev->timer);
+#endif
+
+ dev->atm_dev->dev_data = dev;
+
+ func_exit ();
+ return 0;
+}
+
+
+int __init fs_register_and_init (struct pci_dev *pci_dev, int type)
+{
+ struct atm_dev *atm_dev;
+ struct fs_dev *fs_dev;
+
+ if (pci_enable_device(pci_dev)) return 1;
+
+ fs_dev = kmalloc (sizeof (struct fs_dev), GFP_KERNEL);
+ fs_dprintk (FS_DEBUG_ALLOC, "Alloc fs-dev: %p(%d)\n",
+ fs_dev, sizeof (struct fs_dev));
+ if (!fs_dev) return 1;
+
+ memset (fs_dev, 0, sizeof (struct fs_dev));
+
+ atm_dev = atm_dev_register("fs", &ops, -1, NULL);
+ if (!atm_dev) return 1;
+
+ fs_dev->pci_dev = pci_dev;
+ fs_dev->atm_dev = atm_dev;
+
+ fs_dev->flags = type;
+
+ if (fs_init(fs_dev)) {
+ atm_dev_deregister(atm_dev);
+ return 1;
+ }
+
+ fs_dev->next = fs_boards;
+ fs_boards = fs_dev;
+ return 0;
+}
+
+
+int __init fs_detect(void)
+{
+ struct pci_dev *pci_dev;
+ int devs = 0;
+
+ func_enter ();
+ pci_dev = NULL;
+ while ((pci_dev = pci_find_device(PCI_VENDOR_ID_FUJITSU_ME,
+ PCI_DEVICE_ID_FUJITSU_FS50,
+ pci_dev))) {
+ if (fs_register_and_init (pci_dev, FS_IS50))
+ break;
+ devs++;
+ }
+
+ while ((pci_dev = pci_find_device(PCI_VENDOR_ID_FUJITSU_ME,
+ PCI_DEVICE_ID_FUJITSU_FS155,
+ pci_dev))) {
+ if (fs_register_and_init (pci_dev, FS_IS155))
+ break;
+ devs++;
+ }
+ func_exit ();
+ return devs;
+}
+
+
+
+#ifdef MODULE
+
+int init_module(void)
+{
+ func_enter ();
+ if (!fs_detect()) {
+ printk(KERN_ERR "fs: no FireStream adapter found\n");
+ return -ENXIO;
+ }
+ func_exit ();
+ return 0;
+}
+
+
+void cleanup_module(void)
+{
+ int i;
+ struct fs_dev *dev, *nxtdev;
+ struct fs_vcc *vcc;
+ struct FS_BPENTRY *fp, *nxt;
+
+ func_enter ();
+
+#if 0
+ printk ("hptxq:\n");
+ for (i=0;i<60;i++) {
+ printk ("%d: %08x %08x %08x %08x \n",
+ i, pq[qp].cmd, pq[qp].p0, pq[qp].p1, pq[qp].p2);
+ qp++;
+ if (qp >= 60) qp = 0;
+ }
+
+ printk ("descriptors:\n");
+ for (i=0;i<60;i++) {
+ printk ("%d: %p: %08x %08x %p %p\n",
+ i, da[qd], dq[qd].flags, dq[qd].bsa, dq[qd].skb, dq[qd].dev);
+ qd++;
+ if (qd >= 60) qd = 0;
+ }
+#endif
+
+ for (dev = fs_boards;dev != NULL;dev=nxtdev) {
+ fs_dprintk (FS_DEBUG_CLEANUP, "Releasing resources for dev at %p.\n", dev);
+
+ /* XXX Hit all the tx channels too! */
+
+ for (i=0;i < dev->nchannels;i++) {
+ if (dev->atm_vccs[i]) {
+ vcc = FS_VCC (dev->atm_vccs[i]);
+ submit_command (dev, &dev->hp_txq,
+ QE_CMD_TX_PURGE_INH | QE_CMD_IMM_INQ | vcc->channo, 0,0,0);
+ submit_command (dev, &dev->hp_txq,
+ QE_CMD_RX_PURGE_INH | QE_CMD_IMM_INQ | vcc->channo, 0,0,0);
+
+ }
+ }
+
+ /* XXX Wait a while for the chip to release all buffers. */
+
+ for (i=0;i < FS_NR_FREE_POOLS;i++) {
+ for (fp=bus_to_virt (read_fs (dev, FP_SA(dev->rx_fp[i].offset)));
+ !(fp->flags & FP_FLAGS_EPI);fp = nxt) {
+ fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", fp->skb);
+ dev_kfree_skb_any (fp->skb);
+ nxt = bus_to_virt (fp->next);
+ fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", fp);
+ kfree (fp);
+ }
+ fs_dprintk (FS_DEBUG_ALLOC, "Free rec-skb: %p\n", fp->skb);
+ dev_kfree_skb_any (fp->skb);
+ fs_dprintk (FS_DEBUG_ALLOC, "Free rec-d: %p\n", fp);
+ kfree (fp);
+ }
+
+ /* Hang the chip in "reset", prevent it clobbering memory that is
+ no longer ours. */
+ reset_chip (dev);
+
+ fs_dprintk (FS_DEBUG_CLEANUP, "Freeing irq%d.\n", dev->irq);
+ free_irq (dev->irq, dev);
+ del_timer (&dev->timer);
+
+ atm_dev_deregister(dev->atm_dev);
+ free_queue (dev, &dev->hp_txq);
+ free_queue (dev, &dev->lp_txq);
+ free_queue (dev, &dev->tx_relq);
+ free_queue (dev, &dev->st_q);
+
+ fs_dprintk (FS_DEBUG_ALLOC, "Free atmvccs: %p\n", dev->atm_vccs);
+ kfree (dev->atm_vccs);
+
+ for (i=0;i< FS_NR_FREE_POOLS;i++)
+ free_freepool (dev, &dev->rx_fp[i]);
+
+ for (i=0;i < FS_NR_RX_QUEUES;i++)
+ free_queue (dev, &dev->rx_rq[i]);
+
+ fs_dprintk (FS_DEBUG_ALLOC, "Free fs-dev: %p\n", dev);
+ nxtdev = dev->next;
+ kfree (dev);
+ }
+
+ func_exit ();
+}
+
+
+#endif
diff -u -r --new-file linux-2.4.0-test11.clean/drivers/atm/firestream.h linux-2.4.0-test11.fs50+atmrefcount/drivers/atm/firestream.h
--- linux-2.4.0-test11.clean/drivers/atm/firestream.h Thu Jan 1 01:00:00 1970
+++ linux-2.4.0-test11.fs50+atmrefcount/drivers/atm/firestream.h Wed Nov 22 08:59:12 2000
@@ -0,0 +1,508 @@
+
+/* drivers/atm/firestream.h - FireStream 155 (MB86697) and
+ * FireStream 50 (MB86695) device driver
+ */
+
+/* Written & (C) 2000 by R.E.Wolff@BitWizard.nl
+ * Copied snippets from zatm.c by Werner Almesberger, EPFL LRC/ICA
+ * and ambassador.c Copyright (C) 1995-1999 Madge Networks Ltd
+ */
+
+/*
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+ The GNU GPL is contained in /usr/doc/copyright/GPL on a Debian
+ system and in the file COPYING in the Linux kernel source.
+*/
+
+
+/***********************************************************************
+ * first the defines for the chip. *
+ ***********************************************************************/
+
+
+/********************* General chip parameters. ************************/
+
+#define FS_NR_FREE_POOLS 8
+#define FS_NR_RX_QUEUES 4
+
+
+/********************* queues and queue access macros ******************/
+
+
+/* A queue entry. */
+struct FS_QENTRY {
+ u32 cmd;
+ u32 p0, p1, p2;
+};
+
+
+/* A freepool entry. */
+struct FS_BPENTRY {
+ u32 flags;
+ u32 next;
+ u32 bsa;
+ u32 aal_bufsize;
+
+ /* The hardware doesn't look at this, but we need the SKB somewhere... */
+ struct sk_buff *skb;
+ struct freepool *fp;
+ struct fs_dev *dev;
+};
+
+
+#define STATUS_CODE(qe) ((qe->cmd >> 22) & 0x3f)
+
+
+/* OFFSETS against the base of a QUEUE... */
+#define QSA 0x00
+#define QEA 0x04
+#define QRP 0x08
+#define QWP 0x0c
+#define QCNF 0x10 /* Only for Release queues! */
+ /* Not for the transmit pending queue. */
+
+
+/* OFFSETS against the base of a FREE POOL... */
+#define FPCNF 0x00
+#define FPSA 0x04
+#define FPEA 0x08
+#define FPCNT 0x0c
+#define FPCTU 0x10
+
+#define Q_SA(b) (b + QSA )
+#define Q_EA(b) (b + QEA )
+#define Q_RP(b) (b + QRP )
+#define Q_WP(b) (b + QWP )
+#define Q_CNF(b) (b + QCNF)
+
+#define FP_CNF(b) (b + FPCNF)
+#define FP_SA(b) (b + FPSA)
+#define FP_EA(b) (b + FPEA)
+#define FP_CNT(b) (b + FPCNT)
+#define FP_CTU(b) (b + FPCTU)
+
+/* bits in a queue register. */
+#define Q_FULL 0x1
+#define Q_EMPTY 0x2
+#define Q_INCWRAP 0x4
+#define Q_ADDR_MASK 0xfffffff0
+
+/* bits in a FreePool config register */
+#define RBFP_RBS (0x1 << 16)
+#define RBFP_RBSVAL (0x1 << 15)
+#define RBFP_CME (0x1 << 12)
+#define RBFP_DLP (0x1 << 11)
+#define RBFP_BFPWT (0x1 << 0)
+
+
+
+
+/* FireStream commands. */
+#define QE_CMD_NULL (0x00 << 22)
+#define QE_CMD_REG_RD (0x01 << 22)
+#define QE_CMD_REG_RDM (0x02 << 22)
+#define QE_CMD_REG_WR (0x03 << 22)
+#define QE_CMD_REG_WRM (0x04 << 22)
+#define QE_CMD_CONFIG_TX (0x05 << 22)
+#define QE_CMD_CONFIG_RX (0x06 << 22)
+#define QE_CMD_PRP_RD (0x07 << 22)
+#define QE_CMD_PRP_RDM (0x2a << 22)
+#define QE_CMD_PRP_WR (0x09 << 22)
+#define QE_CMD_PRP_WRM (0x2b << 22)
+#define QE_CMD_RX_EN (0x0a << 22)
+#define QE_CMD_RX_PURGE (0x0b << 22)
+#define QE_CMD_RX_PURGE_INH (0x0c << 22)
+#define QE_CMD_TX_EN (0x0d << 22)
+#define QE_CMD_TX_PURGE (0x0e << 22)
+#define QE_CMD_TX_PURGE_INH (0x0f << 22)
+#define QE_CMD_RST_CG (0x10 << 22)
+#define QE_CMD_SET_CG (0x11 << 22)
+#define QE_CMD_RST_CLP (0x12 << 22)
+#define QE_CMD_SET_CLP (0x13 << 22)
+#define QE_CMD_OVERRIDE (0x14 << 22)
+#define QE_CMD_ADD_BFP (0x15 << 22)
+#define QE_CMD_DUMP_TX (0x16 << 22)
+#define QE_CMD_DUMP_RX (0x17 << 22)
+#define QE_CMD_LRAM_RD (0x18 << 22)
+#define QE_CMD_LRAM_RDM (0x28 << 22)
+#define QE_CMD_LRAM_WR (0x19 << 22)
+#define QE_CMD_LRAM_WRM (0x29 << 22)
+#define QE_CMD_LRAM_BSET (0x1a << 22)
+#define QE_CMD_LRAM_BCLR (0x1b << 22)
+#define QE_CMD_CONFIG_SEGM (0x1c << 22)
+#define QE_CMD_READ_SEGM (0x1d << 22)
+#define QE_CMD_CONFIG_ROUT (0x1e << 22)
+#define QE_CMD_READ_ROUT (0x1f << 22)
+#define QE_CMD_CONFIG_TM (0x20 << 22)
+#define QE_CMD_READ_TM (0x21 << 22)
+#define QE_CMD_CONFIG_TXBM (0x22 << 22)
+#define QE_CMD_READ_TXBM (0x23 << 22)
+#define QE_CMD_CONFIG_RXBM (0x24 << 22)
+#define QE_CMD_READ_RXBM (0x25 << 22)
+#define QE_CMD_CONFIG_REAS (0x26 << 22)
+#define QE_CMD_READ_REAS (0x27 << 22)
+
+#define QE_TRANSMIT_DE (0x0 << 30)
+#define QE_CMD_LINKED (0x1 << 30)
+#define QE_CMD_IMM (0x2 << 30)
+#define QE_CMD_IMM_INQ (0x3 << 30)
+
+#define TD_EPI (0x1 << 27)
+#define TD_COMMAND (0x1 << 28)
+
+#define TD_DATA (0x0 << 29)
+#define TD_RM_CELL (0x1 << 29)
+#define TD_OAM_CELL (0x2 << 29)
+#define TD_OAM_CELL_SEGMENT (0x3 << 29)
+
+#define TD_BPI (0x1 << 20)
+
+#define FP_FLAGS_EPI (0x1 << 27)
+
+
+#define TX_PQ(i) (0x00 + (i) * 0x10)
+#define TXB_RQ (0x20)
+#define ST_Q (0x48)
+#define RXB_FP(i) (0x90 + (i) * 0x14)
+#define RXB_RQ(i) (0x134 + (i) * 0x14)
+
+
+#define TXQ_HP 0
+#define TXQ_LP 1
+
+/* Phew. You don't want to know how many revisions these simple queue
+ * address macros went through before I got them nice and compact as
+ * they are now. -- REW
+ */
+
+
+/* And now for something completely different:
+ * The rest of the registers... */
+
+
+#define CMDR0 0x34
+#define CMDR1 0x38
+#define CMDR2 0x3c
+#define CMDR3 0x40
+
+
+#define SARMODE0 0x5c
+
+#define SARMODE0_TXVCS_0 (0x0 << 0)
+#define SARMODE0_TXVCS_1k (0x1 << 0)
+#define SARMODE0_TXVCS_2k (0x2 << 0)
+#define SARMODE0_TXVCS_4k (0x3 << 0)
+#define SARMODE0_TXVCS_8k (0x4 << 0)
+#define SARMODE0_TXVCS_16k (0x5 << 0)
+#define SARMODE0_TXVCS_32k (0x6 << 0)
+#define SARMODE0_TXVCS_64k (0x7 << 0)
+#define SARMODE0_TXVCS_32 (0x8 << 0)
+
+#define SARMODE0_ABRVCS_0 (0x0 << 4)
+#define SARMODE0_ABRVCS_512 (0x1 << 4)
+#define SARMODE0_ABRVCS_1k (0x2 << 4)
+#define SARMODE0_ABRVCS_2k (0x3 << 4)
+#define SARMODE0_ABRVCS_4k (0x4 << 4)
+#define SARMODE0_ABRVCS_8k (0x5 << 4)
+#define SARMODE0_ABRVCS_16k (0x6 << 4)
+#define SARMODE0_ABRVCS_32k (0x7 << 4)
+#define SARMODE0_ABRVCS_32 (0x9 << 4) /* The others are "8", this one really has to
+ be 9. Tell me you don't believe me. -- REW */
+
+#define SARMODE0_RXVCS_0 (0x0 << 8)
+#define SARMODE0_RXVCS_1k (0x1 << 8)
+#define SARMODE0_RXVCS_2k (0x2 << 8)
+#define SARMODE0_RXVCS_4k (0x3 << 8)
+#define SARMODE0_RXVCS_8k (0x4 << 8)
+#define SARMODE0_RXVCS_16k (0x5 << 8)
+#define SARMODE0_RXVCS_32k (0x6 << 8)
+#define SARMODE0_RXVCS_64k (0x7 << 8)
+#define SARMODE0_RXVCS_32 (0x8 << 8)
+
+#define SARMODE0_CALSUP_1 (0x0 << 12)
+#define SARMODE0_CALSUP_2 (0x1 << 12)
+#define SARMODE0_CALSUP_3 (0x2 << 12)
+#define SARMODE0_CALSUP_4 (0x3 << 12)
+
+#define SARMODE0_PRPWT_FS50_0 (0x0 << 14)
+#define SARMODE0_PRPWT_FS50_2 (0x1 << 14)
+#define SARMODE0_PRPWT_FS50_5 (0x2 << 14)
+#define SARMODE0_PRPWT_FS50_11 (0x3 << 14)
+
+#define SARMODE0_PRPWT_FS155_0 (0x0 << 14)
+#define SARMODE0_PRPWT_FS155_1 (0x1 << 14)
+#define SARMODE0_PRPWT_FS155_2 (0x2 << 14)
+#define SARMODE0_PRPWT_FS155_3 (0x3 << 14)
+
+#define SARMODE0_SRTS0 (0x1 << 23)
+#define SARMODE0_SRTS1 (0x1 << 24)
+
+#define SARMODE0_RUN (0x1 << 25)
+
+#define SARMODE0_UNLOCK (0x1 << 26)
+#define SARMODE0_CWRE (0x1 << 27)
+
+
+#define SARMODE0_INTMODE_READCLEAR (0x0 << 28)
+#define SARMODE0_INTMODE_READNOCLEAR (0x1 << 28)
+#define SARMODE0_INTMODE_READNOCLEARINHIBIT (0x2 << 28)
+#define SARMODE0_INTMODE_READCLEARINHIBIT (0x3 << 28) /* Tell me you don't believe me. */
+
+#define SARMODE0_GINT (0x1 << 30)
+#define SARMODE0_SHADEN (0x1 << 31)
+
+
+#define SARMODE1 0x60
+
+
+#define SARMODE1_TRTL_SHIFT 0 /* Program to 0 */
+#define SARMODE1_RRTL_SHIFT 4 /* Program to 0 */
+
+#define SARMODE1_TAGM (0x1 << 8) /* Program to 0 */
+
+#define SARMODE1_HECM0 (0x1 << 9)
+#define SARMODE1_HECM1 (0x1 << 10)
+#define SARMODE1_HECM2 (0x1 << 11)
+
+#define SARMODE1_GFCE (0x1 << 14)
+#define SARMODE1_GFCR (0x1 << 15)
+#define SARMODE1_PMS (0x1 << 18)
+#define SARMODE1_GPRI (0x1 << 19)
+#define SARMODE1_GPAS (0x1 << 20)
+#define SARMODE1_GVAS (0x1 << 21)
+#define SARMODE1_GNAM (0x1 << 22)
+#define SARMODE1_GPLEN (0x1 << 23)
+#define SARMODE1_DUMPE (0x1 << 24)
+#define SARMODE1_OAMCRC (0x1 << 25)
+#define SARMODE1_DCOAM (0x1 << 26)
+#define SARMODE1_DCRM (0x1 << 27)
+#define SARMODE1_TSTLP (0x1 << 28)
+#define SARMODE1_DEFHEC (0x1 << 29)
+
+
+#define ISR 0x64
+#define IUSR 0x68
+#define IMR 0x6c
+
+#define ISR_LPCO (0x1 << 0)
+#define ISR_DPCO (0x1 << 1)
+#define ISR_RBRQ0_W (0x1 << 2)
+#define ISR_RBRQ1_W (0x1 << 3)
+#define ISR_RBRQ2_W (0x1 << 4)
+#define ISR_RBRQ3_W (0x1 << 5)
+#define ISR_RBRQ0_NF (0x1 << 6)
+#define ISR_RBRQ1_NF (0x1 << 7)
+#define ISR_RBRQ2_NF (0x1 << 8)
+#define ISR_RBRQ3_NF (0x1 << 9)
+#define ISR_BFP_SC (0x1 << 10)
+#define ISR_INIT (0x1 << 11)
+#define ISR_INIT_ERR (0x1 << 12) /* Documented as "reserved" */
+#define ISR_USCEO (0x1 << 13)
+#define ISR_UPEC0 (0x1 << 14)
+#define ISR_VPFCO (0x1 << 15)
+#define ISR_CRCCO (0x1 << 16)
+#define ISR_HECO (0x1 << 17)
+#define ISR_TBRQ_W (0x1 << 18)
+#define ISR_TBRQ_NF (0x1 << 19)
+#define ISR_CTPQ_E (0x1 << 20)
+#define ISR_GFC_C0 (0x1 << 21)
+#define ISR_PCI_FTL (0x1 << 22)
+#define ISR_CSQ_W (0x1 << 23)
+#define ISR_CSQ_NF (0x1 << 24)
+#define ISR_EXT_INT (0x1 << 25)
+#define ISR_RXDMA_S (0x1 << 26)
+
+
+#define TMCONF 0x78
+/* Bits? */
+
+
+#define CALPRESCALE 0x7c
+/* Bits? */
+
+#define CELLOSCONF 0x84
+#define CELLOSCONF_COTS (0x1 << 28)
+#define CELLOSCONF_CEN (0x1 << 27)
+#define CELLOSCONF_SC8 (0x3 << 24)
+#define CELLOSCONF_SC4 (0x2 << 24)
+#define CELLOSCONF_SC2 (0x1 << 24)
+#define CELLOSCONF_SC1 (0x0 << 24)
+
+#define CELLOSCONF_COBS (0x1 << 16)
+#define CELLOSCONF_COPK (0x1 << 8)
+#define CELLOSCONF_COST (0x1 << 0)
+/* Bits? */
+
+
+#define RAS0 0x1bc
+#define RAS0_DCD_XHLT (0x1 << 31)
+
+#define RAS0_VPSEL (0x1 << 16)
+#define RAS0_VCSEL (0x1 << 0)
+
+
+#define DMAMR 0x1cc
+#define DMAMR_TX_MODE_FULL (0x0 << 0)
+#define DMAMR_TX_MODE_PART (0x1 << 0)
+#define DMAMR_TX_MODE_NONE (0x2 << 0) /* And 3 */
+
+
+
+struct fs_transmit_config {
+ u32 flags;
+ u32 atm_hdr;
+ u32 TMC[4];
+ u32 spec;
+ u32 rtag[3];
+};
+
+#define TC_FLAGS_AAL5 (0x0 << 29)
+#define TC_FLAGS_PACKET (0x0)
+#define TC_FLAGS_TYPE_ABR (0x0 << 22)
+#define TC_FLAGS_TYPE_CBR (0x1 << 22)
+#define TC_FLAGS_TYPE_VBR (0x2 << 22)
+#define TC_FLAGS_TYPE_UBR (0x3 << 22)
+#define TC_FLAGS_CAL0 (0x0 << 20)
+#define TC_FLAGS_CAL1 (0x1 << 20)
+#define TC_FLAGS_CAL2 (0x2 << 20)
+#define TC_FLAGS_CAL3 (0x3 << 20)
+
+
+#define RC_FLAGS_NAM (0x1 << 13)
+#define RC_FLAGS_RXBM_PSB (0x0 << 14)
+#define RC_FLAGS_RXBM_CIF (0x1 << 14)
+#define RC_FLAGS_RXBM_PMB (0x2 << 14)
+#define RC_FLAGS_RXBM_STR (0x4 << 14)
+#define RC_FLAGS_RXBM_SAF (0x6 << 14)
+#define RC_FLAGS_RXBM_POS (0x6 << 14)
+#define RC_FLAGS_BFPS (0x1 << 17)
+
+#define RC_FLAGS_BFPS_BFP (0x1 << 17)
+
+#define RC_FLAGS_BFPS_BFP0 (0x0 << 17)
+#define RC_FLAGS_BFPS_BFP1 (0x1 << 17)
+#define RC_FLAGS_BFPS_BFP2 (0x2 << 17)
+#define RC_FLAGS_BFPS_BFP3 (0x3 << 17)
+#define RC_FLAGS_BFPS_BFP4 (0x4 << 17)
+#define RC_FLAGS_BFPS_BFP5 (0x5 << 17)
+#define RC_FLAGS_BFPS_BFP6 (0x6 << 17)
+#define RC_FLAGS_BFPS_BFP7 (0x7 << 17)
+#define RC_FLAGS_BFPS_BFP01 (0x8 << 17)
+#define RC_FLAGS_BFPS_BFP23 (0x9 << 17)
+#define RC_FLAGS_BFPS_BFP45 (0xa << 17)
+#define RC_FLAGS_BFPS_BFP67 (0xb << 17)
+#define RC_FLAGS_BFPS_BFP07 (0xc << 17)
+#define RC_FLAGS_BFPS_BFP27 (0xd << 17)
+#define RC_FLAGS_BFPS_BFP47 (0xe << 17)
+
+#define RC_FLAGS_BFPS (0x1 << 17)
+#define RC_FLAGS_BFPP (0x1 << 21)
+#define RC_FLAGS_TEVC (0x1 << 22)
+#define RC_FLAGS_TEP (0x1 << 23)
+#define RC_FLAGS_AAL5 (0x0 << 24)
+#define RC_FLAGS_TRANSP (0x1 << 24)
+#define RC_FLAGS_TRANSC (0x2 << 24)
+#define RC_FLAGS_ML (0x1 << 27)
+#define RC_FLAGS_TRBRM (0x1 << 28)
+#define RC_FLAGS_PRI (0x1 << 29)
+#define RC_FLAGS_HOAM (0x1 << 30)
+#define RC_FLAGS_CRC10 (0x1 << 31)
+
+
+#define RAC 0x1c8
+#define RAM 0x1c4
+
+
+
+/************************************************************************
+ * Then the datastructures that the DRIVER uses. *
+ ************************************************************************/
+
+#define TXQ_NENTRIES 32
+#define RXRQ_NENTRIES 1024
+
+
+struct fs_vcc {
+ int channo;
+ wait_queue_head_t close_wait;
+ struct sk_buff *last_skb;
+};
+
+
+struct queue {
+ struct FS_QENTRY *sa, *ea;
+ int offset;
+};
+
+struct freepool {
+ int offset;
+ int bufsize;
+ int nr_buffers;
+ int n;
+};
+
+
+struct fs_dev {
+ struct fs_dev *next; /* other FS devices */
+ int flags;
+
+ unsigned char irq; /* IRQ */
+ struct pci_dev *pci_dev; /* PCI stuff */
+ struct atm_dev *atm_dev;
+ struct timer_list timer;
+
+ unsigned long hw_base; /* mem base address */
+ unsigned long base; /* Mapping of base address */
+ int channo;
+ unsigned long channel_mask;
+
+ struct queue hp_txq, lp_txq, tx_relq, st_q;
+ struct freepool rx_fp[FS_NR_FREE_POOLS];
+ struct queue rx_rq[FS_NR_RX_QUEUES];
+
+ int nchannels;
+ struct atm_vcc **atm_vccs;
+ void *tx_inuse;
+ int ntxpckts;
+};
+
+
+
+
+/* Number of channesl that the FS50 supports. */
+#define FS50_CHANNEL_BITS 5
+#define FS50_NR_CHANNELS (1 << FS50_CHANNEL_BITS)
+
+
+#define FS_DEV(atm_dev) ((struct fs_dev *) (atm_dev)->dev_data)
+#define FS_VCC(atm_vcc) ((struct fs_vcc *) (atm_vcc)->dev_data)
+
+
+#define FS_IS50 0x1
+#define FS_IS155 0x2
+
+#define IS_FS50(dev) (dev->flags & FS_IS50)
+#define IS_FS155(dev) (dev->flags & FS_IS155)
+
+/* Within limits this is user-configurable. */
+/* Note: Currently the sum (10 -> 1k channels) is hardcoded in the driver. */
+#define FS155_VPI_BITS 5
+#define FS155_VCI_BITS 5
+
+#define FS155_CHANNEL_BITS (FS155_VPI_BITS + FS155_VCI_BITS)
+#define FS155_NR_CHANNELS (1 << FS155_CHANNEL_BITS)
+
+
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