2 * Copyright (c) 2006 QLogic, Inc. All rights reserved.
3 * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 * These are the routines used by layered drivers, currently just the
36 * layered ethernet driver and verbs layer.
40 #include <linux/pci.h>
41 #include <asm/byteorder.h>
43 #include "ipath_kernel.h"
44 #include "ipath_layer.h"
45 #include "ipath_verbs.h"
46 #include "ipath_common.h"
48 /* Acquire before ipath_devs_lock. */
49 static DEFINE_MUTEX(ipath_layer_mutex);
51 u16 ipath_layer_rcv_opcode;
53 static int (*layer_intr)(void *, u32);
54 static int (*layer_rcv)(void *, void *, struct sk_buff *);
55 static int (*layer_rcv_lid)(void *, void *);
57 static void *(*layer_add_one)(int, struct ipath_devdata *);
58 static void (*layer_remove_one)(void *);
60 int __ipath_layer_intr(struct ipath_devdata *dd, u32 arg)
64 if (dd->ipath_layer.l_arg && layer_intr)
65 ret = layer_intr(dd->ipath_layer.l_arg, arg);
70 int ipath_layer_intr(struct ipath_devdata *dd, u32 arg)
74 mutex_lock(&ipath_layer_mutex);
76 ret = __ipath_layer_intr(dd, arg);
78 mutex_unlock(&ipath_layer_mutex);
83 int __ipath_layer_rcv(struct ipath_devdata *dd, void *hdr,
88 if (dd->ipath_layer.l_arg && layer_rcv)
89 ret = layer_rcv(dd->ipath_layer.l_arg, hdr, skb);
94 int __ipath_layer_rcv_lid(struct ipath_devdata *dd, void *hdr)
98 if (dd->ipath_layer.l_arg && layer_rcv_lid)
99 ret = layer_rcv_lid(dd->ipath_layer.l_arg, hdr);
104 void ipath_layer_lid_changed(struct ipath_devdata *dd)
106 mutex_lock(&ipath_layer_mutex);
108 if (dd->ipath_layer.l_arg && layer_intr)
109 layer_intr(dd->ipath_layer.l_arg, IPATH_LAYER_INT_LID);
111 mutex_unlock(&ipath_layer_mutex);
114 void ipath_layer_add(struct ipath_devdata *dd)
116 mutex_lock(&ipath_layer_mutex);
119 dd->ipath_layer.l_arg =
120 layer_add_one(dd->ipath_unit, dd);
122 mutex_unlock(&ipath_layer_mutex);
125 void ipath_layer_remove(struct ipath_devdata *dd)
127 mutex_lock(&ipath_layer_mutex);
129 if (dd->ipath_layer.l_arg && layer_remove_one) {
130 layer_remove_one(dd->ipath_layer.l_arg);
131 dd->ipath_layer.l_arg = NULL;
134 mutex_unlock(&ipath_layer_mutex);
137 int ipath_layer_register(void *(*l_add)(int, struct ipath_devdata *),
138 void (*l_remove)(void *),
139 int (*l_intr)(void *, u32),
140 int (*l_rcv)(void *, void *, struct sk_buff *),
142 int (*l_rcv_lid)(void *, void *))
144 struct ipath_devdata *dd, *tmp;
147 mutex_lock(&ipath_layer_mutex);
149 layer_add_one = l_add;
150 layer_remove_one = l_remove;
153 layer_rcv_lid = l_rcv_lid;
154 ipath_layer_rcv_opcode = l_rcv_opcode;
156 spin_lock_irqsave(&ipath_devs_lock, flags);
158 list_for_each_entry_safe(dd, tmp, &ipath_dev_list, ipath_list) {
159 if (!(dd->ipath_flags & IPATH_INITTED))
162 if (dd->ipath_layer.l_arg)
165 if (!(*dd->ipath_statusp & IPATH_STATUS_SMA))
166 *dd->ipath_statusp |= IPATH_STATUS_OIB_SMA;
168 spin_unlock_irqrestore(&ipath_devs_lock, flags);
169 dd->ipath_layer.l_arg = l_add(dd->ipath_unit, dd);
170 spin_lock_irqsave(&ipath_devs_lock, flags);
173 spin_unlock_irqrestore(&ipath_devs_lock, flags);
174 mutex_unlock(&ipath_layer_mutex);
179 EXPORT_SYMBOL_GPL(ipath_layer_register);
181 void ipath_layer_unregister(void)
183 struct ipath_devdata *dd, *tmp;
186 mutex_lock(&ipath_layer_mutex);
187 spin_lock_irqsave(&ipath_devs_lock, flags);
189 list_for_each_entry_safe(dd, tmp, &ipath_dev_list, ipath_list) {
190 if (dd->ipath_layer.l_arg && layer_remove_one) {
191 spin_unlock_irqrestore(&ipath_devs_lock, flags);
192 layer_remove_one(dd->ipath_layer.l_arg);
193 spin_lock_irqsave(&ipath_devs_lock, flags);
194 dd->ipath_layer.l_arg = NULL;
198 spin_unlock_irqrestore(&ipath_devs_lock, flags);
200 layer_add_one = NULL;
201 layer_remove_one = NULL;
204 layer_rcv_lid = NULL;
206 mutex_unlock(&ipath_layer_mutex);
209 EXPORT_SYMBOL_GPL(ipath_layer_unregister);
211 int ipath_layer_open(struct ipath_devdata *dd, u32 * pktmax)
216 mutex_lock(&ipath_layer_mutex);
218 if (!dd->ipath_layer.l_arg) {
223 ret = ipath_setrcvhdrsize(dd, IPATH_HEADER_QUEUE_WORDS);
228 *pktmax = dd->ipath_ibmaxlen;
230 if (*dd->ipath_statusp & IPATH_STATUS_IB_READY)
231 intval |= IPATH_LAYER_INT_IF_UP;
233 intval |= IPATH_LAYER_INT_LID;
235 intval |= IPATH_LAYER_INT_BCAST;
237 * do this on open, in case low level is already up and
238 * just layered driver was reloaded, etc.
241 layer_intr(dd->ipath_layer.l_arg, intval);
245 mutex_unlock(&ipath_layer_mutex);
250 EXPORT_SYMBOL_GPL(ipath_layer_open);
252 u16 ipath_layer_get_lid(struct ipath_devdata *dd)
254 return dd->ipath_lid;
257 EXPORT_SYMBOL_GPL(ipath_layer_get_lid);
260 * ipath_layer_get_mac - get the MAC address
261 * @dd: the infinipath device
262 * @mac: the MAC is put here
264 * This is the EUID-64 OUI octets (top 3), then
265 * skip the next 2 (which should both be zero or 0xff).
266 * The returned MAC is in network order
267 * mac points to at least 6 bytes of buffer
268 * We assume that by the time the LID is set, that the GUID is as valid
269 * as it's ever going to be, rather than adding yet another status bit.
272 int ipath_layer_get_mac(struct ipath_devdata *dd, u8 * mac)
276 guid = (u8 *) &dd->ipath_guid;
284 if ((guid[3] || guid[4]) && !(guid[3] == 0xff && guid[4] == 0xff))
285 ipath_dbg("Warning, guid bytes 3 and 4 not 0 or 0xffff: "
286 "%x %x\n", guid[3], guid[4]);
290 EXPORT_SYMBOL_GPL(ipath_layer_get_mac);
292 u16 ipath_layer_get_bcast(struct ipath_devdata *dd)
294 return dd->ipath_mlid;
297 EXPORT_SYMBOL_GPL(ipath_layer_get_bcast);
299 int ipath_layer_send_hdr(struct ipath_devdata *dd, struct ether_header *hdr)
307 if (!(dd->ipath_flags & IPATH_RCVHDRSZ_SET)) {
308 ipath_dbg("send while not open\n");
311 if ((dd->ipath_flags & (IPATH_LINKUNK | IPATH_LINKDOWN)) ||
312 dd->ipath_lid == 0) {
314 * lid check is for when sma hasn't yet configured
317 ipath_cdbg(VERBOSE, "send while not ready, "
318 "mylid=%u, flags=0x%x\n",
319 dd->ipath_lid, dd->ipath_flags);
322 vlsllnh = *((__be16 *) hdr);
323 if (vlsllnh != htons(IPATH_LRH_BTH)) {
324 ipath_dbg("Warning: lrh[0] wrong (%x, not %x); "
325 "not sending\n", be16_to_cpu(vlsllnh),
332 /* Get a PIO buffer to use. */
333 piobuf = ipath_getpiobuf(dd, NULL);
334 if (piobuf == NULL) {
339 plen = (sizeof(*hdr) >> 2); /* actual length */
340 ipath_cdbg(EPKT, "0x%x+1w pio %p\n", plen, piobuf);
342 writeq(plen+1, piobuf); /* len (+1 for pad) to pbc, no flags */
346 count = plen-1; /* amount we can copy before trigger word */
347 __iowrite32_copy(piobuf, uhdr, count);
349 __raw_writel(uhdr[count], piobuf + count);
350 ipath_flush_wc(); /* ensure it's sent, now */
352 ipath_stats.sps_ether_spkts++; /* ether packet sent */
358 EXPORT_SYMBOL_GPL(ipath_layer_send_hdr);
360 int ipath_layer_set_piointbufavail_int(struct ipath_devdata *dd)
362 set_bit(IPATH_S_PIOINTBUFAVAIL, &dd->ipath_sendctrl);
364 ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
369 EXPORT_SYMBOL_GPL(ipath_layer_set_piointbufavail_int);