diff options
author | Tom Tucker <tom@opengridcomputing.com> | 2006-09-22 18:22:48 -0400 |
---|---|---|
committer | Roland Dreier <rolandd@cisco.com> | 2006-09-22 18:22:48 -0400 |
commit | f94b533d091a42da92d908eb7b3f9ade1923f90d (patch) | |
tree | e8deed557c293bdb5eeaf8ca87ddda69e1cf3586 /drivers/infiniband/hw/amso1100/c2.c | |
parent | 07ebafbaaa72aa6a35472879008f5a1d1d469a0c (diff) |
RDMA/amso1100: Add driver for Ammasso 1100 RNIC
Add a driver for the Ammasso 1100 gigabit ethernet RNIC.
Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/amso1100/c2.c')
-rw-r--r-- | drivers/infiniband/hw/amso1100/c2.c | 1255 |
1 files changed, 1255 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/amso1100/c2.c b/drivers/infiniband/hw/amso1100/c2.c new file mode 100644 index 000000000000..9e9120f36019 --- /dev/null +++ b/drivers/infiniband/hw/amso1100/c2.c | |||
@@ -0,0 +1,1255 @@ | |||
1 | /* | ||
2 | * Copyright (c) 2005 Ammasso, Inc. All rights reserved. | ||
3 | * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved. | ||
4 | * | ||
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: | ||
10 | * | ||
11 | * Redistribution and use in source and binary forms, with or | ||
12 | * without modification, are permitted provided that the following | ||
13 | * conditions are met: | ||
14 | * | ||
15 | * - Redistributions of source code must retain the above | ||
16 | * copyright notice, this list of conditions and the following | ||
17 | * disclaimer. | ||
18 | * | ||
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. | ||
23 | * | ||
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 | ||
31 | * SOFTWARE. | ||
32 | */ | ||
33 | #include <linux/module.h> | ||
34 | #include <linux/moduleparam.h> | ||
35 | #include <linux/pci.h> | ||
36 | #include <linux/netdevice.h> | ||
37 | #include <linux/etherdevice.h> | ||
38 | #include <linux/inetdevice.h> | ||
39 | #include <linux/delay.h> | ||
40 | #include <linux/ethtool.h> | ||
41 | #include <linux/mii.h> | ||
42 | #include <linux/if_vlan.h> | ||
43 | #include <linux/crc32.h> | ||
44 | #include <linux/in.h> | ||
45 | #include <linux/ip.h> | ||
46 | #include <linux/tcp.h> | ||
47 | #include <linux/init.h> | ||
48 | #include <linux/dma-mapping.h> | ||
49 | |||
50 | #include <asm/io.h> | ||
51 | #include <asm/irq.h> | ||
52 | #include <asm/byteorder.h> | ||
53 | |||
54 | #include <rdma/ib_smi.h> | ||
55 | #include "c2.h" | ||
56 | #include "c2_provider.h" | ||
57 | |||
58 | MODULE_AUTHOR("Tom Tucker <tom@opengridcomputing.com>"); | ||
59 | MODULE_DESCRIPTION("Ammasso AMSO1100 Low-level iWARP Driver"); | ||
60 | MODULE_LICENSE("Dual BSD/GPL"); | ||
61 | MODULE_VERSION(DRV_VERSION); | ||
62 | |||
63 | static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | ||
64 | | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN; | ||
65 | |||
66 | static int debug = -1; /* defaults above */ | ||
67 | module_param(debug, int, 0); | ||
68 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | ||
69 | |||
70 | static int c2_up(struct net_device *netdev); | ||
71 | static int c2_down(struct net_device *netdev); | ||
72 | static int c2_xmit_frame(struct sk_buff *skb, struct net_device *netdev); | ||
73 | static void c2_tx_interrupt(struct net_device *netdev); | ||
74 | static void c2_rx_interrupt(struct net_device *netdev); | ||
75 | static irqreturn_t c2_interrupt(int irq, void *dev_id, struct pt_regs *regs); | ||
76 | static void c2_tx_timeout(struct net_device *netdev); | ||
77 | static int c2_change_mtu(struct net_device *netdev, int new_mtu); | ||
78 | static void c2_reset(struct c2_port *c2_port); | ||
79 | static struct net_device_stats *c2_get_stats(struct net_device *netdev); | ||
80 | |||
81 | static struct pci_device_id c2_pci_table[] = { | ||
82 | { PCI_DEVICE(0x18b8, 0xb001) }, | ||
83 | { 0 } | ||
84 | }; | ||
85 | |||
86 | MODULE_DEVICE_TABLE(pci, c2_pci_table); | ||
87 | |||
88 | static void c2_print_macaddr(struct net_device *netdev) | ||
89 | { | ||
90 | pr_debug("%s: MAC %02X:%02X:%02X:%02X:%02X:%02X, " | ||
91 | "IRQ %u\n", netdev->name, | ||
92 | netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2], | ||
93 | netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5], | ||
94 | netdev->irq); | ||
95 | } | ||
96 | |||
97 | static void c2_set_rxbufsize(struct c2_port *c2_port) | ||
98 | { | ||
99 | struct net_device *netdev = c2_port->netdev; | ||
100 | |||
101 | if (netdev->mtu > RX_BUF_SIZE) | ||
102 | c2_port->rx_buf_size = | ||
103 | netdev->mtu + ETH_HLEN + sizeof(struct c2_rxp_hdr) + | ||
104 | NET_IP_ALIGN; | ||
105 | else | ||
106 | c2_port->rx_buf_size = sizeof(struct c2_rxp_hdr) + RX_BUF_SIZE; | ||
107 | } | ||
108 | |||
109 | /* | ||
110 | * Allocate TX ring elements and chain them together. | ||
111 | * One-to-one association of adapter descriptors with ring elements. | ||
112 | */ | ||
113 | static int c2_tx_ring_alloc(struct c2_ring *tx_ring, void *vaddr, | ||
114 | dma_addr_t base, void __iomem * mmio_txp_ring) | ||
115 | { | ||
116 | struct c2_tx_desc *tx_desc; | ||
117 | struct c2_txp_desc __iomem *txp_desc; | ||
118 | struct c2_element *elem; | ||
119 | int i; | ||
120 | |||
121 | tx_ring->start = kmalloc(sizeof(*elem) * tx_ring->count, GFP_KERNEL); | ||
122 | if (!tx_ring->start) | ||
123 | return -ENOMEM; | ||
124 | |||
125 | elem = tx_ring->start; | ||
126 | tx_desc = vaddr; | ||
127 | txp_desc = mmio_txp_ring; | ||
128 | for (i = 0; i < tx_ring->count; i++, elem++, tx_desc++, txp_desc++) { | ||
129 | tx_desc->len = 0; | ||
130 | tx_desc->status = 0; | ||
131 | |||
132 | /* Set TXP_HTXD_UNINIT */ | ||
133 | __raw_writeq(cpu_to_be64(0x1122334455667788ULL), | ||
134 | (void __iomem *) txp_desc + C2_TXP_ADDR); | ||
135 | __raw_writew(0, (void __iomem *) txp_desc + C2_TXP_LEN); | ||
136 | __raw_writew(cpu_to_be16(TXP_HTXD_UNINIT), | ||
137 | (void __iomem *) txp_desc + C2_TXP_FLAGS); | ||
138 | |||
139 | elem->skb = NULL; | ||
140 | elem->ht_desc = tx_desc; | ||
141 | elem->hw_desc = txp_desc; | ||
142 | |||
143 | if (i == tx_ring->count - 1) { | ||
144 | elem->next = tx_ring->start; | ||
145 | tx_desc->next_offset = base; | ||
146 | } else { | ||
147 | elem->next = elem + 1; | ||
148 | tx_desc->next_offset = | ||
149 | base + (i + 1) * sizeof(*tx_desc); | ||
150 | } | ||
151 | } | ||
152 | |||
153 | tx_ring->to_use = tx_ring->to_clean = tx_ring->start; | ||
154 | |||
155 | return 0; | ||
156 | } | ||
157 | |||
158 | /* | ||
159 | * Allocate RX ring elements and chain them together. | ||
160 | * One-to-one association of adapter descriptors with ring elements. | ||
161 | */ | ||
162 | static int c2_rx_ring_alloc(struct c2_ring *rx_ring, void *vaddr, | ||
163 | dma_addr_t base, void __iomem * mmio_rxp_ring) | ||
164 | { | ||
165 | struct c2_rx_desc *rx_desc; | ||
166 | struct c2_rxp_desc __iomem *rxp_desc; | ||
167 | struct c2_element *elem; | ||
168 | int i; | ||
169 | |||
170 | rx_ring->start = kmalloc(sizeof(*elem) * rx_ring->count, GFP_KERNEL); | ||
171 | if (!rx_ring->start) | ||
172 | return -ENOMEM; | ||
173 | |||
174 | elem = rx_ring->start; | ||
175 | rx_desc = vaddr; | ||
176 | rxp_desc = mmio_rxp_ring; | ||
177 | for (i = 0; i < rx_ring->count; i++, elem++, rx_desc++, rxp_desc++) { | ||
178 | rx_desc->len = 0; | ||
179 | rx_desc->status = 0; | ||
180 | |||
181 | /* Set RXP_HRXD_UNINIT */ | ||
182 | __raw_writew(cpu_to_be16(RXP_HRXD_OK), | ||
183 | (void __iomem *) rxp_desc + C2_RXP_STATUS); | ||
184 | __raw_writew(0, (void __iomem *) rxp_desc + C2_RXP_COUNT); | ||
185 | __raw_writew(0, (void __iomem *) rxp_desc + C2_RXP_LEN); | ||
186 | __raw_writeq(cpu_to_be64(0x99aabbccddeeffULL), | ||
187 | (void __iomem *) rxp_desc + C2_RXP_ADDR); | ||
188 | __raw_writew(cpu_to_be16(RXP_HRXD_UNINIT), | ||
189 | (void __iomem *) rxp_desc + C2_RXP_FLAGS); | ||
190 | |||
191 | elem->skb = NULL; | ||
192 | elem->ht_desc = rx_desc; | ||
193 | elem->hw_desc = rxp_desc; | ||
194 | |||
195 | if (i == rx_ring->count - 1) { | ||
196 | elem->next = rx_ring->start; | ||
197 | rx_desc->next_offset = base; | ||
198 | } else { | ||
199 | elem->next = elem + 1; | ||
200 | rx_desc->next_offset = | ||
201 | base + (i + 1) * sizeof(*rx_desc); | ||
202 | } | ||
203 | } | ||
204 | |||
205 | rx_ring->to_use = rx_ring->to_clean = rx_ring->start; | ||
206 | |||
207 | return 0; | ||
208 | } | ||
209 | |||
210 | /* Setup buffer for receiving */ | ||
211 | static inline int c2_rx_alloc(struct c2_port *c2_port, struct c2_element *elem) | ||
212 | { | ||
213 | struct c2_dev *c2dev = c2_port->c2dev; | ||
214 | struct c2_rx_desc *rx_desc = elem->ht_desc; | ||
215 | struct sk_buff *skb; | ||
216 | dma_addr_t mapaddr; | ||
217 | u32 maplen; | ||
218 | struct c2_rxp_hdr *rxp_hdr; | ||
219 | |||
220 | skb = dev_alloc_skb(c2_port->rx_buf_size); | ||
221 | if (unlikely(!skb)) { | ||
222 | pr_debug("%s: out of memory for receive\n", | ||
223 | c2_port->netdev->name); | ||
224 | return -ENOMEM; | ||
225 | } | ||
226 | |||
227 | /* Zero out the rxp hdr in the sk_buff */ | ||
228 | memset(skb->data, 0, sizeof(*rxp_hdr)); | ||
229 | |||
230 | skb->dev = c2_port->netdev; | ||
231 | |||
232 | maplen = c2_port->rx_buf_size; | ||
233 | mapaddr = | ||
234 | pci_map_single(c2dev->pcidev, skb->data, maplen, | ||
235 | PCI_DMA_FROMDEVICE); | ||
236 | |||
237 | /* Set the sk_buff RXP_header to RXP_HRXD_READY */ | ||
238 | rxp_hdr = (struct c2_rxp_hdr *) skb->data; | ||
239 | rxp_hdr->flags = RXP_HRXD_READY; | ||
240 | |||
241 | __raw_writew(0, elem->hw_desc + C2_RXP_STATUS); | ||
242 | __raw_writew(cpu_to_be16((u16) maplen - sizeof(*rxp_hdr)), | ||
243 | elem->hw_desc + C2_RXP_LEN); | ||
244 | __raw_writeq(cpu_to_be64(mapaddr), elem->hw_desc + C2_RXP_ADDR); | ||
245 | __raw_writew(cpu_to_be16(RXP_HRXD_READY), elem->hw_desc + C2_RXP_FLAGS); | ||
246 | |||
247 | elem->skb = skb; | ||
248 | elem->mapaddr = mapaddr; | ||
249 | elem->maplen = maplen; | ||
250 | rx_desc->len = maplen; | ||
251 | |||
252 | return 0; | ||
253 | } | ||
254 | |||
255 | /* | ||
256 | * Allocate buffers for the Rx ring | ||
257 | * For receive: rx_ring.to_clean is next received frame | ||
258 | */ | ||
259 | static int c2_rx_fill(struct c2_port *c2_port) | ||
260 | { | ||
261 | struct c2_ring *rx_ring = &c2_port->rx_ring; | ||
262 | struct c2_element *elem; | ||
263 | int ret = 0; | ||
264 | |||
265 | elem = rx_ring->start; | ||
266 | do { | ||
267 | if (c2_rx_alloc(c2_port, elem)) { | ||
268 | ret = 1; | ||
269 | break; | ||
270 | } | ||
271 | } while ((elem = elem->next) != rx_ring->start); | ||
272 | |||
273 | rx_ring->to_clean = rx_ring->start; | ||
274 | return ret; | ||
275 | } | ||
276 | |||
277 | /* Free all buffers in RX ring, assumes receiver stopped */ | ||
278 | static void c2_rx_clean(struct c2_port *c2_port) | ||
279 | { | ||
280 | struct c2_dev *c2dev = c2_port->c2dev; | ||
281 | struct c2_ring *rx_ring = &c2_port->rx_ring; | ||
282 | struct c2_element *elem; | ||
283 | struct c2_rx_desc *rx_desc; | ||
284 | |||
285 | elem = rx_ring->start; | ||
286 | do { | ||
287 | rx_desc = elem->ht_desc; | ||
288 | rx_desc->len = 0; | ||
289 | |||
290 | __raw_writew(0, elem->hw_desc + C2_RXP_STATUS); | ||
291 | __raw_writew(0, elem->hw_desc + C2_RXP_COUNT); | ||
292 | __raw_writew(0, elem->hw_desc + C2_RXP_LEN); | ||
293 | __raw_writeq(cpu_to_be64(0x99aabbccddeeffULL), | ||
294 | elem->hw_desc + C2_RXP_ADDR); | ||
295 | __raw_writew(cpu_to_be16(RXP_HRXD_UNINIT), | ||
296 | elem->hw_desc + C2_RXP_FLAGS); | ||
297 | |||
298 | if (elem->skb) { | ||
299 | pci_unmap_single(c2dev->pcidev, elem->mapaddr, | ||
300 | elem->maplen, PCI_DMA_FROMDEVICE); | ||
301 | dev_kfree_skb(elem->skb); | ||
302 | elem->skb = NULL; | ||
303 | } | ||
304 | } while ((elem = elem->next) != rx_ring->start); | ||
305 | } | ||
306 | |||
307 | static inline int c2_tx_free(struct c2_dev *c2dev, struct c2_element *elem) | ||
308 | { | ||
309 | struct c2_tx_desc *tx_desc = elem->ht_desc; | ||
310 | |||
311 | tx_desc->len = 0; | ||
312 | |||
313 | pci_unmap_single(c2dev->pcidev, elem->mapaddr, elem->maplen, | ||
314 | PCI_DMA_TODEVICE); | ||
315 | |||
316 | if (elem->skb) { | ||
317 | dev_kfree_skb_any(elem->skb); | ||
318 | elem->skb = NULL; | ||
319 | } | ||
320 | |||
321 | return 0; | ||
322 | } | ||
323 | |||
324 | /* Free all buffers in TX ring, assumes transmitter stopped */ | ||
325 | static void c2_tx_clean(struct c2_port *c2_port) | ||
326 | { | ||
327 | struct c2_ring *tx_ring = &c2_port->tx_ring; | ||
328 | struct c2_element *elem; | ||
329 | struct c2_txp_desc txp_htxd; | ||
330 | int retry; | ||
331 | unsigned long flags; | ||
332 | |||
333 | spin_lock_irqsave(&c2_port->tx_lock, flags); | ||
334 | |||
335 | elem = tx_ring->start; | ||
336 | |||
337 | do { | ||
338 | retry = 0; | ||
339 | do { | ||
340 | txp_htxd.flags = | ||
341 | readw(elem->hw_desc + C2_TXP_FLAGS); | ||
342 | |||
343 | if (txp_htxd.flags == TXP_HTXD_READY) { | ||
344 | retry = 1; | ||
345 | __raw_writew(0, | ||
346 | elem->hw_desc + C2_TXP_LEN); | ||
347 | __raw_writeq(0, | ||
348 | elem->hw_desc + C2_TXP_ADDR); | ||
349 | __raw_writew(cpu_to_be16(TXP_HTXD_DONE), | ||
350 | elem->hw_desc + C2_TXP_FLAGS); | ||
351 | c2_port->netstats.tx_dropped++; | ||
352 | break; | ||
353 | } else { | ||
354 | __raw_writew(0, | ||
355 | elem->hw_desc + C2_TXP_LEN); | ||
356 | __raw_writeq(cpu_to_be64(0x1122334455667788ULL), | ||
357 | elem->hw_desc + C2_TXP_ADDR); | ||
358 | __raw_writew(cpu_to_be16(TXP_HTXD_UNINIT), | ||
359 | elem->hw_desc + C2_TXP_FLAGS); | ||
360 | } | ||
361 | |||
362 | c2_tx_free(c2_port->c2dev, elem); | ||
363 | |||
364 | } while ((elem = elem->next) != tx_ring->start); | ||
365 | } while (retry); | ||
366 | |||
367 | c2_port->tx_avail = c2_port->tx_ring.count - 1; | ||
368 | c2_port->c2dev->cur_tx = tx_ring->to_use - tx_ring->start; | ||
369 | |||
370 | if (c2_port->tx_avail > MAX_SKB_FRAGS + 1) | ||
371 | netif_wake_queue(c2_port->netdev); | ||
372 | |||
373 | spin_unlock_irqrestore(&c2_port->tx_lock, flags); | ||
374 | } | ||
375 | |||
376 | /* | ||
377 | * Process transmit descriptors marked 'DONE' by the firmware, | ||
378 | * freeing up their unneeded sk_buffs. | ||
379 | */ | ||
380 | static void c2_tx_interrupt(struct net_device *netdev) | ||
381 | { | ||
382 | struct c2_port *c2_port = netdev_priv(netdev); | ||
383 | struct c2_dev *c2dev = c2_port->c2dev; | ||
384 | struct c2_ring *tx_ring = &c2_port->tx_ring; | ||
385 | struct c2_element *elem; | ||
386 | struct c2_txp_desc txp_htxd; | ||
387 | |||
388 | spin_lock(&c2_port->tx_lock); | ||
389 | |||
390 | for (elem = tx_ring->to_clean; elem != tx_ring->to_use; | ||
391 | elem = elem->next) { | ||
392 | txp_htxd.flags = | ||
393 | be16_to_cpu(readw(elem->hw_desc + C2_TXP_FLAGS)); | ||
394 | |||
395 | if (txp_htxd.flags != TXP_HTXD_DONE) | ||
396 | break; | ||
397 | |||
398 | if (netif_msg_tx_done(c2_port)) { | ||
399 | /* PCI reads are expensive in fast path */ | ||
400 | txp_htxd.len = | ||
401 | be16_to_cpu(readw(elem->hw_desc + C2_TXP_LEN)); | ||
402 | pr_debug("%s: tx done slot %3Zu status 0x%x len " | ||
403 | "%5u bytes\n", | ||
404 | netdev->name, elem - tx_ring->start, | ||
405 | txp_htxd.flags, txp_htxd.len); | ||
406 | } | ||
407 | |||
408 | c2_tx_free(c2dev, elem); | ||
409 | ++(c2_port->tx_avail); | ||
410 | } | ||
411 | |||
412 | tx_ring->to_clean = elem; | ||
413 | |||
414 | if (netif_queue_stopped(netdev) | ||
415 | && c2_port->tx_avail > MAX_SKB_FRAGS + 1) | ||
416 | netif_wake_queue(netdev); | ||
417 | |||
418 | spin_unlock(&c2_port->tx_lock); | ||
419 | } | ||
420 | |||
421 | static void c2_rx_error(struct c2_port *c2_port, struct c2_element *elem) | ||
422 | { | ||
423 | struct c2_rx_desc *rx_desc = elem->ht_desc; | ||
424 | struct c2_rxp_hdr *rxp_hdr = (struct c2_rxp_hdr *) elem->skb->data; | ||
425 | |||
426 | if (rxp_hdr->status != RXP_HRXD_OK || | ||
427 | rxp_hdr->len > (rx_desc->len - sizeof(*rxp_hdr))) { | ||
428 | pr_debug("BAD RXP_HRXD\n"); | ||
429 | pr_debug(" rx_desc : %p\n", rx_desc); | ||
430 | pr_debug(" index : %Zu\n", | ||
431 | elem - c2_port->rx_ring.start); | ||
432 | pr_debug(" len : %u\n", rx_desc->len); | ||
433 | pr_debug(" rxp_hdr : %p [PA %p]\n", rxp_hdr, | ||
434 | (void *) __pa((unsigned long) rxp_hdr)); | ||
435 | pr_debug(" flags : 0x%x\n", rxp_hdr->flags); | ||
436 | pr_debug(" status: 0x%x\n", rxp_hdr->status); | ||
437 | pr_debug(" len : %u\n", rxp_hdr->len); | ||
438 | pr_debug(" rsvd : 0x%x\n", rxp_hdr->rsvd); | ||
439 | } | ||
440 | |||
441 | /* Setup the skb for reuse since we're dropping this pkt */ | ||
442 | elem->skb->tail = elem->skb->data = elem->skb->head; | ||
443 | |||
444 | /* Zero out the rxp hdr in the sk_buff */ | ||
445 | memset(elem->skb->data, 0, sizeof(*rxp_hdr)); | ||
446 | |||
447 | /* Write the descriptor to the adapter's rx ring */ | ||
448 | __raw_writew(0, elem->hw_desc + C2_RXP_STATUS); | ||
449 | __raw_writew(0, elem->hw_desc + C2_RXP_COUNT); | ||
450 | __raw_writew(cpu_to_be16((u16) elem->maplen - sizeof(*rxp_hdr)), | ||
451 | elem->hw_desc + C2_RXP_LEN); | ||
452 | __raw_writeq(cpu_to_be64(elem->mapaddr), elem->hw_desc + C2_RXP_ADDR); | ||
453 | __raw_writew(cpu_to_be16(RXP_HRXD_READY), elem->hw_desc + C2_RXP_FLAGS); | ||
454 | |||
455 | pr_debug("packet dropped\n"); | ||
456 | c2_port->netstats.rx_dropped++; | ||
457 | } | ||
458 | |||
459 | static void c2_rx_interrupt(struct net_device *netdev) | ||
460 | { | ||
461 | struct c2_port *c2_port = netdev_priv(netdev); | ||
462 | struct c2_dev *c2dev = c2_port->c2dev; | ||
463 | struct c2_ring *rx_ring = &c2_port->rx_ring; | ||
464 | struct c2_element *elem; | ||
465 | struct c2_rx_desc *rx_desc; | ||
466 | struct c2_rxp_hdr *rxp_hdr; | ||
467 | struct sk_buff *skb; | ||
468 | dma_addr_t mapaddr; | ||
469 | u32 maplen, buflen; | ||
470 | unsigned long flags; | ||
471 | |||
472 | spin_lock_irqsave(&c2dev->lock, flags); | ||
473 | |||
474 | /* Begin where we left off */ | ||
475 | rx_ring->to_clean = rx_ring->start + c2dev->cur_rx; | ||
476 | |||
477 | for (elem = rx_ring->to_clean; elem->next != rx_ring->to_clean; | ||
478 | elem = elem->next) { | ||
479 | rx_desc = elem->ht_desc; | ||
480 | mapaddr = elem->mapaddr; | ||
481 | maplen = elem->maplen; | ||
482 | skb = elem->skb; | ||
483 | rxp_hdr = (struct c2_rxp_hdr *) skb->data; | ||
484 | |||
485 | if (rxp_hdr->flags != RXP_HRXD_DONE) | ||
486 | break; | ||
487 | buflen = rxp_hdr->len; | ||
488 | |||
489 | /* Sanity check the RXP header */ | ||
490 | if (rxp_hdr->status != RXP_HRXD_OK || | ||
491 | buflen > (rx_desc->len - sizeof(*rxp_hdr))) { | ||
492 | c2_rx_error(c2_port, elem); | ||
493 | continue; | ||
494 | } | ||
495 | |||
496 | /* | ||
497 | * Allocate and map a new skb for replenishing the host | ||
498 | * RX desc | ||
499 | */ | ||
500 | if (c2_rx_alloc(c2_port, elem)) { | ||
501 | c2_rx_error(c2_port, elem); | ||
502 | continue; | ||
503 | } | ||
504 | |||
505 | /* Unmap the old skb */ | ||
506 | pci_unmap_single(c2dev->pcidev, mapaddr, maplen, | ||
507 | PCI_DMA_FROMDEVICE); | ||
508 | |||
509 | prefetch(skb->data); | ||
510 | |||
511 | /* | ||
512 | * Skip past the leading 8 bytes comprising of the | ||
513 | * "struct c2_rxp_hdr", prepended by the adapter | ||
514 | * to the usual Ethernet header ("struct ethhdr"), | ||
515 | * to the start of the raw Ethernet packet. | ||
516 | * | ||
517 | * Fix up the various fields in the sk_buff before | ||
518 | * passing it up to netif_rx(). The transfer size | ||
519 | * (in bytes) specified by the adapter len field of | ||
520 | * the "struct rxp_hdr_t" does NOT include the | ||
521 | * "sizeof(struct c2_rxp_hdr)". | ||
522 | */ | ||
523 | skb->data += sizeof(*rxp_hdr); | ||
524 | skb->tail = skb->data + buflen; | ||
525 | skb->len = buflen; | ||
526 | skb->dev = netdev; | ||
527 | skb->protocol = eth_type_trans(skb, netdev); | ||
528 | |||
529 | netif_rx(skb); | ||
530 | |||
531 | netdev->last_rx = jiffies; | ||
532 | c2_port->netstats.rx_packets++; | ||
533 | c2_port->netstats.rx_bytes += buflen; | ||
534 | } | ||
535 | |||
536 | /* Save where we left off */ | ||
537 | rx_ring->to_clean = elem; | ||
538 | c2dev->cur_rx = elem - rx_ring->start; | ||
539 | C2_SET_CUR_RX(c2dev, c2dev->cur_rx); | ||
540 | |||
541 | spin_unlock_irqrestore(&c2dev->lock, flags); | ||
542 | } | ||
543 | |||
544 | /* | ||
545 | * Handle netisr0 TX & RX interrupts. | ||
546 | */ | ||
547 | static irqreturn_t c2_interrupt(int irq, void *dev_id, struct pt_regs *regs) | ||
548 | { | ||
549 | unsigned int netisr0, dmaisr; | ||
550 | int handled = 0; | ||
551 | struct c2_dev *c2dev = (struct c2_dev *) dev_id; | ||
552 | |||
553 | /* Process CCILNET interrupts */ | ||
554 | netisr0 = readl(c2dev->regs + C2_NISR0); | ||
555 | if (netisr0) { | ||
556 | |||
557 | /* | ||
558 | * There is an issue with the firmware that always | ||
559 | * provides the status of RX for both TX & RX | ||
560 | * interrupts. So process both queues here. | ||
561 | */ | ||
562 | c2_rx_interrupt(c2dev->netdev); | ||
563 | c2_tx_interrupt(c2dev->netdev); | ||
564 | |||
565 | /* Clear the interrupt */ | ||
566 | writel(netisr0, c2dev->regs + C2_NISR0); | ||
567 | handled++; | ||
568 | } | ||
569 | |||
570 | /* Process RNIC interrupts */ | ||
571 | dmaisr = readl(c2dev->regs + C2_DISR); | ||
572 | if (dmaisr) { | ||
573 | writel(dmaisr, c2dev->regs + C2_DISR); | ||
574 | c2_rnic_interrupt(c2dev); | ||
575 | handled++; | ||
576 | } | ||
577 | |||
578 | if (handled) { | ||
579 | return IRQ_HANDLED; | ||
580 | } else { | ||
581 | return IRQ_NONE; | ||
582 | } | ||
583 | } | ||
584 | |||
585 | static int c2_up(struct net_device *netdev) | ||
586 | { | ||
587 | struct c2_port *c2_port = netdev_priv(netdev); | ||
588 | struct c2_dev *c2dev = c2_port->c2dev; | ||
589 | struct c2_element *elem; | ||
590 | struct c2_rxp_hdr *rxp_hdr; | ||
591 | struct in_device *in_dev; | ||
592 | size_t rx_size, tx_size; | ||
593 | int ret, i; | ||
594 | unsigned int netimr0; | ||
595 | |||
596 | if (netif_msg_ifup(c2_port)) | ||
597 | pr_debug("%s: enabling interface\n", netdev->name); | ||
598 | |||
599 | /* Set the Rx buffer size based on MTU */ | ||
600 | c2_set_rxbufsize(c2_port); | ||
601 | |||
602 | /* Allocate DMA'able memory for Tx/Rx host descriptor rings */ | ||
603 | rx_size = c2_port->rx_ring.count * sizeof(struct c2_rx_desc); | ||
604 | tx_size = c2_port->tx_ring.count * sizeof(struct c2_tx_desc); | ||
605 | |||
606 | c2_port->mem_size = tx_size + rx_size; | ||
607 | c2_port->mem = pci_alloc_consistent(c2dev->pcidev, c2_port->mem_size, | ||
608 | &c2_port->dma); | ||
609 | if (c2_port->mem == NULL) { | ||
610 | pr_debug("Unable to allocate memory for " | ||
611 | "host descriptor rings\n"); | ||
612 | return -ENOMEM; | ||
613 | } | ||
614 | |||
615 | memset(c2_port->mem, 0, c2_port->mem_size); | ||
616 | |||
617 | /* Create the Rx host descriptor ring */ | ||
618 | if ((ret = | ||
619 | c2_rx_ring_alloc(&c2_port->rx_ring, c2_port->mem, c2_port->dma, | ||
620 | c2dev->mmio_rxp_ring))) { | ||
621 | pr_debug("Unable to create RX ring\n"); | ||
622 | goto bail0; | ||
623 | } | ||
624 | |||
625 | /* Allocate Rx buffers for the host descriptor ring */ | ||
626 | if (c2_rx_fill(c2_port)) { | ||
627 | pr_debug("Unable to fill RX ring\n"); | ||
628 | goto bail1; | ||
629 | } | ||
630 | |||
631 | /* Create the Tx host descriptor ring */ | ||
632 | if ((ret = c2_tx_ring_alloc(&c2_port->tx_ring, c2_port->mem + rx_size, | ||
633 | c2_port->dma + rx_size, | ||
634 | c2dev->mmio_txp_ring))) { | ||
635 | pr_debug("Unable to create TX ring\n"); | ||
636 | goto bail1; | ||
637 | } | ||
638 | |||
639 | /* Set the TX pointer to where we left off */ | ||
640 | c2_port->tx_avail = c2_port->tx_ring.count - 1; | ||
641 | c2_port->tx_ring.to_use = c2_port->tx_ring.to_clean = | ||
642 | c2_port->tx_ring.start + c2dev->cur_tx; | ||
643 | |||
644 | /* missing: Initialize MAC */ | ||
645 | |||
646 | BUG_ON(c2_port->tx_ring.to_use != c2_port->tx_ring.to_clean); | ||
647 | |||
648 | /* Reset the adapter, ensures the driver is in sync with the RXP */ | ||
649 | c2_reset(c2_port); | ||
650 | |||
651 | /* Reset the READY bit in the sk_buff RXP headers & adapter HRXDQ */ | ||
652 | for (i = 0, elem = c2_port->rx_ring.start; i < c2_port->rx_ring.count; | ||
653 | i++, elem++) { | ||
654 | rxp_hdr = (struct c2_rxp_hdr *) elem->skb->data; | ||
655 | rxp_hdr->flags = 0; | ||
656 | __raw_writew(cpu_to_be16(RXP_HRXD_READY), | ||
657 | elem->hw_desc + C2_RXP_FLAGS); | ||
658 | } | ||
659 | |||
660 | /* Enable network packets */ | ||
661 | netif_start_queue(netdev); | ||
662 | |||
663 | /* Enable IRQ */ | ||
664 | writel(0, c2dev->regs + C2_IDIS); | ||
665 | netimr0 = readl(c2dev->regs + C2_NIMR0); | ||
666 | netimr0 &= ~(C2_PCI_HTX_INT | C2_PCI_HRX_INT); | ||
667 | writel(netimr0, c2dev->regs + C2_NIMR0); | ||
668 | |||
669 | /* Tell the stack to ignore arp requests for ipaddrs bound to | ||
670 | * other interfaces. This is needed to prevent the host stack | ||
671 | * from responding to arp requests to the ipaddr bound on the | ||
672 | * rdma interface. | ||
673 | */ | ||
674 | in_dev = in_dev_get(netdev); | ||
675 | in_dev->cnf.arp_ignore = 1; | ||
676 | in_dev_put(in_dev); | ||
677 | |||
678 | return 0; | ||
679 | |||
680 | bail1: | ||
681 | c2_rx_clean(c2_port); | ||
682 | kfree(c2_port->rx_ring.start); | ||
683 | |||
684 | bail0: | ||
685 | pci_free_consistent(c2dev->pcidev, c2_port->mem_size, c2_port->mem, | ||
686 | c2_port->dma); | ||
687 | |||
688 | return ret; | ||
689 | } | ||
690 | |||
691 | static int c2_down(struct net_device *netdev) | ||
692 | { | ||
693 | struct c2_port *c2_port = netdev_priv(netdev); | ||
694 | struct c2_dev *c2dev = c2_port->c2dev; | ||
695 | |||
696 | if (netif_msg_ifdown(c2_port)) | ||
697 | pr_debug("%s: disabling interface\n", | ||
698 | netdev->name); | ||
699 | |||
700 | /* Wait for all the queued packets to get sent */ | ||
701 | c2_tx_interrupt(netdev); | ||
702 | |||
703 | /* Disable network packets */ | ||
704 | netif_stop_queue(netdev); | ||
705 | |||
706 | /* Disable IRQs by clearing the interrupt mask */ | ||
707 | writel(1, c2dev->regs + C2_IDIS); | ||
708 | writel(0, c2dev->regs + C2_NIMR0); | ||
709 | |||
710 | /* missing: Stop transmitter */ | ||
711 | |||
712 | /* missing: Stop receiver */ | ||
713 | |||
714 | /* Reset the adapter, ensures the driver is in sync with the RXP */ | ||
715 | c2_reset(c2_port); | ||
716 | |||
717 | /* missing: Turn off LEDs here */ | ||
718 | |||
719 | /* Free all buffers in the host descriptor rings */ | ||
720 | c2_tx_clean(c2_port); | ||
721 | c2_rx_clean(c2_port); | ||
722 | |||
723 | /* Free the host descriptor rings */ | ||
724 | kfree(c2_port->rx_ring.start); | ||
725 | kfree(c2_port->tx_ring.start); | ||
726 | pci_free_consistent(c2dev->pcidev, c2_port->mem_size, c2_port->mem, | ||
727 | c2_port->dma); | ||
728 | |||
729 | return 0; | ||
730 | } | ||
731 | |||
732 | static void c2_reset(struct c2_port *c2_port) | ||
733 | { | ||
734 | struct c2_dev *c2dev = c2_port->c2dev; | ||
735 | unsigned int cur_rx = c2dev->cur_rx; | ||
736 | |||
737 | /* Tell the hardware to quiesce */ | ||
738 | C2_SET_CUR_RX(c2dev, cur_rx | C2_PCI_HRX_QUI); | ||
739 | |||
740 | /* | ||
741 | * The hardware will reset the C2_PCI_HRX_QUI bit once | ||
742 | * the RXP is quiesced. Wait 2 seconds for this. | ||
743 | */ | ||
744 | ssleep(2); | ||
745 | |||
746 | cur_rx = C2_GET_CUR_RX(c2dev); | ||
747 | |||
748 | if (cur_rx & C2_PCI_HRX_QUI) | ||
749 | pr_debug("c2_reset: failed to quiesce the hardware!\n"); | ||
750 | |||
751 | cur_rx &= ~C2_PCI_HRX_QUI; | ||
752 | |||
753 | c2dev->cur_rx = cur_rx; | ||
754 | |||
755 | pr_debug("Current RX: %u\n", c2dev->cur_rx); | ||
756 | } | ||
757 | |||
758 | static int c2_xmit_frame(struct sk_buff *skb, struct net_device *netdev) | ||
759 | { | ||
760 | struct c2_port *c2_port = netdev_priv(netdev); | ||
761 | struct c2_dev *c2dev = c2_port->c2dev; | ||
762 | struct c2_ring *tx_ring = &c2_port->tx_ring; | ||
763 | struct c2_element *elem; | ||
764 | dma_addr_t mapaddr; | ||
765 | u32 maplen; | ||
766 | unsigned long flags; | ||
767 | unsigned int i; | ||
768 | |||
769 | spin_lock_irqsave(&c2_port->tx_lock, flags); | ||
770 | |||
771 | if (unlikely(c2_port->tx_avail < (skb_shinfo(skb)->nr_frags + 1))) { | ||
772 | netif_stop_queue(netdev); | ||
773 | spin_unlock_irqrestore(&c2_port->tx_lock, flags); | ||
774 | |||
775 | pr_debug("%s: Tx ring full when queue awake!\n", | ||
776 | netdev->name); | ||
777 | return NETDEV_TX_BUSY; | ||
778 | } | ||
779 | |||
780 | maplen = skb_headlen(skb); | ||
781 | mapaddr = | ||
782 | pci_map_single(c2dev->pcidev, skb->data, maplen, PCI_DMA_TODEVICE); | ||
783 | |||
784 | elem = tx_ring->to_use; | ||
785 | elem->skb = skb; | ||
786 | elem->mapaddr = mapaddr; | ||
787 | elem->maplen = maplen; | ||
788 | |||
789 | /* Tell HW to xmit */ | ||
790 | __raw_writeq(cpu_to_be64(mapaddr), elem->hw_desc + C2_TXP_ADDR); | ||
791 | __raw_writew(cpu_to_be16(maplen), elem->hw_desc + C2_TXP_LEN); | ||
792 | __raw_writew(cpu_to_be16(TXP_HTXD_READY), elem->hw_desc + C2_TXP_FLAGS); | ||
793 | |||
794 | c2_port->netstats.tx_packets++; | ||
795 | c2_port->netstats.tx_bytes += maplen; | ||
796 | |||
797 | /* Loop thru additional data fragments and queue them */ | ||
798 | if (skb_shinfo(skb)->nr_frags) { | ||
799 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | ||
800 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | ||
801 | maplen = frag->size; | ||
802 | mapaddr = | ||
803 | pci_map_page(c2dev->pcidev, frag->page, | ||
804 | frag->page_offset, maplen, | ||
805 | PCI_DMA_TODEVICE); | ||
806 | |||
807 | elem = elem->next; | ||
808 | elem->skb = NULL; | ||
809 | elem->mapaddr = mapaddr; | ||
810 | elem->maplen = maplen; | ||
811 | |||
812 | /* Tell HW to xmit */ | ||
813 | __raw_writeq(cpu_to_be64(mapaddr), | ||
814 | elem->hw_desc + C2_TXP_ADDR); | ||
815 | __raw_writew(cpu_to_be16(maplen), | ||
816 | elem->hw_desc + C2_TXP_LEN); | ||
817 | __raw_writew(cpu_to_be16(TXP_HTXD_READY), | ||
818 | elem->hw_desc + C2_TXP_FLAGS); | ||
819 | |||
820 | c2_port->netstats.tx_packets++; | ||
821 | c2_port->netstats.tx_bytes += maplen; | ||
822 | } | ||
823 | } | ||
824 | |||
825 | tx_ring->to_use = elem->next; | ||
826 | c2_port->tx_avail -= (skb_shinfo(skb)->nr_frags + 1); | ||
827 | |||
828 | if (c2_port->tx_avail <= MAX_SKB_FRAGS + 1) { | ||
829 | netif_stop_queue(netdev); | ||
830 | if (netif_msg_tx_queued(c2_port)) | ||
831 | pr_debug("%s: transmit queue full\n", | ||
832 | netdev->name); | ||
833 | } | ||
834 | |||
835 | spin_unlock_irqrestore(&c2_port->tx_lock, flags); | ||
836 | |||
837 | netdev->trans_start = jiffies; | ||
838 | |||
839 | return NETDEV_TX_OK; | ||
840 | } | ||
841 | |||
842 | static struct net_device_stats *c2_get_stats(struct net_device *netdev) | ||
843 | { | ||
844 | struct c2_port *c2_port = netdev_priv(netdev); | ||
845 | |||
846 | return &c2_port->netstats; | ||
847 | } | ||
848 | |||
849 | static void c2_tx_timeout(struct net_device *netdev) | ||
850 | { | ||
851 | struct c2_port *c2_port = netdev_priv(netdev); | ||
852 | |||
853 | if (netif_msg_timer(c2_port)) | ||
854 | pr_debug("%s: tx timeout\n", netdev->name); | ||
855 | |||
856 | c2_tx_clean(c2_port); | ||
857 | } | ||
858 | |||
859 | static int c2_change_mtu(struct net_device *netdev, int new_mtu) | ||
860 | { | ||
861 | int ret = 0; | ||
862 | |||
863 | if (new_mtu < ETH_ZLEN || new_mtu > ETH_JUMBO_MTU) | ||
864 | return -EINVAL; | ||
865 | |||
866 | netdev->mtu = new_mtu; | ||
867 | |||
868 | if (netif_running(netdev)) { | ||
869 | c2_down(netdev); | ||
870 | |||
871 | c2_up(netdev); | ||
872 | } | ||
873 | |||
874 | return ret; | ||
875 | } | ||
876 | |||
877 | /* Initialize network device */ | ||
878 | static struct net_device *c2_devinit(struct c2_dev *c2dev, | ||
879 | void __iomem * mmio_addr) | ||
880 | { | ||
881 | struct c2_port *c2_port = NULL; | ||
882 | struct net_device *netdev = alloc_etherdev(sizeof(*c2_port)); | ||
883 | |||
884 | if (!netdev) { | ||
885 | pr_debug("c2_port etherdev alloc failed"); | ||
886 | return NULL; | ||
887 | } | ||
888 | |||
889 | SET_MODULE_OWNER(netdev); | ||
890 | SET_NETDEV_DEV(netdev, &c2dev->pcidev->dev); | ||
891 | |||
892 | netdev->open = c2_up; | ||
893 | netdev->stop = c2_down; | ||
894 | netdev->hard_start_xmit = c2_xmit_frame; | ||
895 | netdev->get_stats = c2_get_stats; | ||
896 | netdev->tx_timeout = c2_tx_timeout; | ||
897 | netdev->change_mtu = c2_change_mtu; | ||
898 | netdev->watchdog_timeo = C2_TX_TIMEOUT; | ||
899 | netdev->irq = c2dev->pcidev->irq; | ||
900 | |||
901 | c2_port = netdev_priv(netdev); | ||
902 | c2_port->netdev = netdev; | ||
903 | c2_port->c2dev = c2dev; | ||
904 | c2_port->msg_enable = netif_msg_init(debug, default_msg); | ||
905 | c2_port->tx_ring.count = C2_NUM_TX_DESC; | ||
906 | c2_port->rx_ring.count = C2_NUM_RX_DESC; | ||
907 | |||
908 | spin_lock_init(&c2_port->tx_lock); | ||
909 | |||
910 | /* Copy our 48-bit ethernet hardware address */ | ||
911 | memcpy_fromio(netdev->dev_addr, mmio_addr + C2_REGS_ENADDR, 6); | ||
912 | |||
913 | /* Validate the MAC address */ | ||
914 | if (!is_valid_ether_addr(netdev->dev_addr)) { | ||
915 | pr_debug("Invalid MAC Address\n"); | ||
916 | c2_print_macaddr(netdev); | ||
917 | free_netdev(netdev); | ||
918 | return NULL; | ||
919 | } | ||
920 | |||
921 | c2dev->netdev = netdev; | ||
922 | |||
923 | return netdev; | ||
924 | } | ||
925 | |||
926 | static int __devinit c2_probe(struct pci_dev *pcidev, | ||
927 | const struct pci_device_id *ent) | ||
928 | { | ||
929 | int ret = 0, i; | ||
930 | unsigned long reg0_start, reg0_flags, reg0_len; | ||
931 | unsigned long reg2_start, reg2_flags, reg2_len; | ||
932 | unsigned long reg4_start, reg4_flags, reg4_len; | ||
933 | unsigned kva_map_size; | ||
934 | struct net_device *netdev = NULL; | ||
935 | struct c2_dev *c2dev = NULL; | ||
936 | void __iomem *mmio_regs = NULL; | ||
937 | |||
938 | printk(KERN_INFO PFX "AMSO1100 Gigabit Ethernet driver v%s loaded\n", | ||
939 | DRV_VERSION); | ||
940 | |||
941 | /* Enable PCI device */ | ||
942 | ret = pci_enable_device(pcidev); | ||
943 | if (ret) { | ||
944 | printk(KERN_ERR PFX "%s: Unable to enable PCI device\n", | ||
945 | pci_name(pcidev)); | ||
946 | goto bail0; | ||
947 | } | ||
948 | |||
949 | reg0_start = pci_resource_start(pcidev, BAR_0); | ||
950 | reg0_len = pci_resource_len(pcidev, BAR_0); | ||
951 | reg0_flags = pci_resource_flags(pcidev, BAR_0); | ||
952 | |||
953 | reg2_start = pci_resource_start(pcidev, BAR_2); | ||
954 | reg2_len = pci_resource_len(pcidev, BAR_2); | ||
955 | reg2_flags = pci_resource_flags(pcidev, BAR_2); | ||
956 | |||
957 | reg4_start = pci_resource_start(pcidev, BAR_4); | ||
958 | reg4_len = pci_resource_len(pcidev, BAR_4); | ||
959 | reg4_flags = pci_resource_flags(pcidev, BAR_4); | ||
960 | |||
961 | pr_debug("BAR0 size = 0x%lX bytes\n", reg0_len); | ||
962 | pr_debug("BAR2 size = 0x%lX bytes\n", reg2_len); | ||
963 | pr_debug("BAR4 size = 0x%lX bytes\n", reg4_len); | ||
964 | |||
965 | /* Make sure PCI base addr are MMIO */ | ||
966 | if (!(reg0_flags & IORESOURCE_MEM) || | ||
967 | !(reg2_flags & IORESOURCE_MEM) || !(reg4_flags & IORESOURCE_MEM)) { | ||
968 | printk(KERN_ERR PFX "PCI regions not an MMIO resource\n"); | ||
969 | ret = -ENODEV; | ||
970 | goto bail1; | ||
971 | } | ||
972 | |||
973 | /* Check for weird/broken PCI region reporting */ | ||
974 | if ((reg0_len < C2_REG0_SIZE) || | ||
975 | (reg2_len < C2_REG2_SIZE) || (reg4_len < C2_REG4_SIZE)) { | ||
976 | printk(KERN_ERR PFX "Invalid PCI region sizes\n"); | ||
977 | ret = -ENODEV; | ||
978 | goto bail1; | ||
979 | } | ||
980 | |||
981 | /* Reserve PCI I/O and memory resources */ | ||
982 | ret = pci_request_regions(pcidev, DRV_NAME); | ||
983 | if (ret) { | ||
984 | printk(KERN_ERR PFX "%s: Unable to request regions\n", | ||
985 | pci_name(pcidev)); | ||
986 | goto bail1; | ||
987 | } | ||
988 | |||
989 | if ((sizeof(dma_addr_t) > 4)) { | ||
990 | ret = pci_set_dma_mask(pcidev, DMA_64BIT_MASK); | ||
991 | if (ret < 0) { | ||
992 | printk(KERN_ERR PFX "64b DMA configuration failed\n"); | ||
993 | goto bail2; | ||
994 | } | ||
995 | } else { | ||
996 | ret = pci_set_dma_mask(pcidev, DMA_32BIT_MASK); | ||
997 | if (ret < 0) { | ||
998 | printk(KERN_ERR PFX "32b DMA configuration failed\n"); | ||
999 | goto bail2; | ||
1000 | } | ||
1001 | } | ||
1002 | |||
1003 | /* Enables bus-mastering on the device */ | ||
1004 | pci_set_master(pcidev); | ||
1005 | |||
1006 | /* Remap the adapter PCI registers in BAR4 */ | ||
1007 | mmio_regs = ioremap_nocache(reg4_start + C2_PCI_REGS_OFFSET, | ||
1008 | sizeof(struct c2_adapter_pci_regs)); | ||
1009 | if (mmio_regs == 0UL) { | ||
1010 | printk(KERN_ERR PFX | ||
1011 | "Unable to remap adapter PCI registers in BAR4\n"); | ||
1012 | ret = -EIO; | ||
1013 | goto bail2; | ||
1014 | } | ||
1015 | |||
1016 | /* Validate PCI regs magic */ | ||
1017 | for (i = 0; i < sizeof(c2_magic); i++) { | ||
1018 | if (c2_magic[i] != readb(mmio_regs + C2_REGS_MAGIC + i)) { | ||
1019 | printk(KERN_ERR PFX "Downlevel Firmware boot loader " | ||
1020 | "[%d/%Zd: got 0x%x, exp 0x%x]. Use the cc_flash " | ||
1021 | "utility to update your boot loader\n", | ||
1022 | i + 1, sizeof(c2_magic), | ||
1023 | readb(mmio_regs + C2_REGS_MAGIC + i), | ||
1024 | c2_magic[i]); | ||
1025 | printk(KERN_ERR PFX "Adapter not claimed\n"); | ||
1026 | iounmap(mmio_regs); | ||
1027 | ret = -EIO; | ||
1028 | goto bail2; | ||
1029 | } | ||
1030 | } | ||
1031 | |||
1032 | /* Validate the adapter version */ | ||
1033 | if (be32_to_cpu(readl(mmio_regs + C2_REGS_VERS)) != C2_VERSION) { | ||
1034 | printk(KERN_ERR PFX "Version mismatch " | ||
1035 | "[fw=%u, c2=%u], Adapter not claimed\n", | ||
1036 | be32_to_cpu(readl(mmio_regs + C2_REGS_VERS)), | ||
1037 | C2_VERSION); | ||
1038 | ret = -EINVAL; | ||
1039 | iounmap(mmio_regs); | ||
1040 | goto bail2; | ||
1041 | } | ||
1042 | |||
1043 | /* Validate the adapter IVN */ | ||
1044 | if (be32_to_cpu(readl(mmio_regs + C2_REGS_IVN)) != C2_IVN) { | ||
1045 | printk(KERN_ERR PFX "Downlevel FIrmware level. You should be using " | ||
1046 | "the OpenIB device support kit. " | ||
1047 | "[fw=0x%x, c2=0x%x], Adapter not claimed\n", | ||
1048 | be32_to_cpu(readl(mmio_regs + C2_REGS_IVN)), | ||
1049 | C2_IVN); | ||
1050 | ret = -EINVAL; | ||
1051 | iounmap(mmio_regs); | ||
1052 | goto bail2; | ||
1053 | } | ||
1054 | |||
1055 | /* Allocate hardware structure */ | ||
1056 | c2dev = (struct c2_dev *) ib_alloc_device(sizeof(*c2dev)); | ||
1057 | if (!c2dev) { | ||
1058 | printk(KERN_ERR PFX "%s: Unable to alloc hardware struct\n", | ||
1059 | pci_name(pcidev)); | ||
1060 | ret = -ENOMEM; | ||
1061 | iounmap(mmio_regs); | ||
1062 | goto bail2; | ||
1063 | } | ||
1064 | |||
1065 | memset(c2dev, 0, sizeof(*c2dev)); | ||
1066 | spin_lock_init(&c2dev->lock); | ||
1067 | c2dev->pcidev = pcidev; | ||
1068 | c2dev->cur_tx = 0; | ||
1069 | |||
1070 | /* Get the last RX index */ | ||
1071 | c2dev->cur_rx = | ||
1072 | (be32_to_cpu(readl(mmio_regs + C2_REGS_HRX_CUR)) - | ||
1073 | 0xffffc000) / sizeof(struct c2_rxp_desc); | ||
1074 | |||
1075 | /* Request an interrupt line for the driver */ | ||
1076 | ret = request_irq(pcidev->irq, c2_interrupt, SA_SHIRQ, DRV_NAME, c2dev); | ||
1077 | if (ret) { | ||
1078 | printk(KERN_ERR PFX "%s: requested IRQ %u is busy\n", | ||
1079 | pci_name(pcidev), pcidev->irq); | ||
1080 | iounmap(mmio_regs); | ||
1081 | goto bail3; | ||
1082 | } | ||
1083 | |||
1084 | /* Set driver specific data */ | ||
1085 | pci_set_drvdata(pcidev, c2dev); | ||
1086 | |||
1087 | /* Initialize network device */ | ||
1088 | if ((netdev = c2_devinit(c2dev, mmio_regs)) == NULL) { | ||
1089 | iounmap(mmio_regs); | ||
1090 | goto bail4; | ||
1091 | } | ||
1092 | |||
1093 | /* Save off the actual size prior to unmapping mmio_regs */ | ||
1094 | kva_map_size = be32_to_cpu(readl(mmio_regs + C2_REGS_PCI_WINSIZE)); | ||
1095 | |||
1096 | /* Unmap the adapter PCI registers in BAR4 */ | ||
1097 | iounmap(mmio_regs); | ||
1098 | |||
1099 | /* Register network device */ | ||
1100 | ret = register_netdev(netdev); | ||
1101 | if (ret) { | ||
1102 | printk(KERN_ERR PFX "Unable to register netdev, ret = %d\n", | ||
1103 | ret); | ||
1104 | goto bail5; | ||
1105 | } | ||
1106 | |||
1107 | /* Disable network packets */ | ||
1108 | netif_stop_queue(netdev); | ||
1109 | |||
1110 | /* Remap the adapter HRXDQ PA space to kernel VA space */ | ||
1111 | c2dev->mmio_rxp_ring = ioremap_nocache(reg4_start + C2_RXP_HRXDQ_OFFSET, | ||
1112 | C2_RXP_HRXDQ_SIZE); | ||
1113 | if (c2dev->mmio_rxp_ring == 0UL) { | ||
1114 | printk(KERN_ERR PFX "Unable to remap MMIO HRXDQ region\n"); | ||
1115 | ret = -EIO; | ||
1116 | goto bail6; | ||
1117 | } | ||
1118 | |||
1119 | /* Remap the adapter HTXDQ PA space to kernel VA space */ | ||
1120 | c2dev->mmio_txp_ring = ioremap_nocache(reg4_start + C2_TXP_HTXDQ_OFFSET, | ||
1121 | C2_TXP_HTXDQ_SIZE); | ||
1122 | if (c2dev->mmio_txp_ring == 0UL) { | ||
1123 | printk(KERN_ERR PFX "Unable to remap MMIO HTXDQ region\n"); | ||
1124 | ret = -EIO; | ||
1125 | goto bail7; | ||
1126 | } | ||
1127 | |||
1128 | /* Save off the current RX index in the last 4 bytes of the TXP Ring */ | ||
1129 | C2_SET_CUR_RX(c2dev, c2dev->cur_rx); | ||
1130 | |||
1131 | /* Remap the PCI registers in adapter BAR0 to kernel VA space */ | ||
1132 | c2dev->regs = ioremap_nocache(reg0_start, reg0_len); | ||
1133 | if (c2dev->regs == 0UL) { | ||
1134 | printk(KERN_ERR PFX "Unable to remap BAR0\n"); | ||
1135 | ret = -EIO; | ||
1136 | goto bail8; | ||
1137 | } | ||
1138 | |||
1139 | /* Remap the PCI registers in adapter BAR4 to kernel VA space */ | ||
1140 | c2dev->pa = reg4_start + C2_PCI_REGS_OFFSET; | ||
1141 | c2dev->kva = ioremap_nocache(reg4_start + C2_PCI_REGS_OFFSET, | ||
1142 | kva_map_size); | ||
1143 | if (c2dev->kva == 0UL) { | ||
1144 | printk(KERN_ERR PFX "Unable to remap BAR4\n"); | ||
1145 | ret = -EIO; | ||
1146 | goto bail9; | ||
1147 | } | ||
1148 | |||
1149 | /* Print out the MAC address */ | ||
1150 | c2_print_macaddr(netdev); | ||
1151 | |||
1152 | ret = c2_rnic_init(c2dev); | ||
1153 | if (ret) { | ||
1154 | printk(KERN_ERR PFX "c2_rnic_init failed: %d\n", ret); | ||
1155 | goto bail10; | ||
1156 | } | ||
1157 | |||
1158 | c2_register_device(c2dev); | ||
1159 | |||
1160 | return 0; | ||
1161 | |||
1162 | bail10: | ||
1163 | iounmap(c2dev->kva); | ||
1164 | |||
1165 | bail9: | ||
1166 | iounmap(c2dev->regs); | ||
1167 | |||
1168 | bail8: | ||
1169 | iounmap(c2dev->mmio_txp_ring); | ||
1170 | |||
1171 | bail7: | ||
1172 | iounmap(c2dev->mmio_rxp_ring); | ||
1173 | |||
1174 | bail6: | ||
1175 | unregister_netdev(netdev); | ||
1176 | |||
1177 | bail5: | ||
1178 | free_netdev(netdev); | ||
1179 | |||
1180 | bail4: | ||
1181 | free_irq(pcidev->irq, c2dev); | ||
1182 | |||
1183 | bail3: | ||
1184 | ib_dealloc_device(&c2dev->ibdev); | ||
1185 | |||
1186 | bail2: | ||
1187 | pci_release_regions(pcidev); | ||
1188 | |||
1189 | bail1: | ||
1190 | pci_disable_device(pcidev); | ||
1191 | |||
1192 | bail0: | ||
1193 | return ret; | ||
1194 | } | ||
1195 | |||
1196 | static void __devexit c2_remove(struct pci_dev *pcidev) | ||
1197 | { | ||
1198 | struct c2_dev *c2dev = pci_get_drvdata(pcidev); | ||
1199 | struct net_device *netdev = c2dev->netdev; | ||
1200 | |||
1201 | /* Unregister with OpenIB */ | ||
1202 | c2_unregister_device(c2dev); | ||
1203 | |||
1204 | /* Clean up the RNIC resources */ | ||
1205 | c2_rnic_term(c2dev); | ||
1206 | |||
1207 | /* Remove network device from the kernel */ | ||
1208 | unregister_netdev(netdev); | ||
1209 | |||
1210 | /* Free network device */ | ||
1211 | free_netdev(netdev); | ||
1212 | |||
1213 | /* Free the interrupt line */ | ||
1214 | free_irq(pcidev->irq, c2dev); | ||
1215 | |||
1216 | /* missing: Turn LEDs off here */ | ||
1217 | |||
1218 | /* Unmap adapter PA space */ | ||
1219 | iounmap(c2dev->kva); | ||
1220 | iounmap(c2dev->regs); | ||
1221 | iounmap(c2dev->mmio_txp_ring); | ||
1222 | iounmap(c2dev->mmio_rxp_ring); | ||
1223 | |||
1224 | /* Free the hardware structure */ | ||
1225 | ib_dealloc_device(&c2dev->ibdev); | ||
1226 | |||
1227 | /* Release reserved PCI I/O and memory resources */ | ||
1228 | pci_release_regions(pcidev); | ||
1229 | |||
1230 | /* Disable PCI device */ | ||
1231 | pci_disable_device(pcidev); | ||
1232 | |||
1233 | /* Clear driver specific data */ | ||
1234 | pci_set_drvdata(pcidev, NULL); | ||
1235 | } | ||
1236 | |||
1237 | static struct pci_driver c2_pci_driver = { | ||
1238 | .name = DRV_NAME, | ||
1239 | .id_table = c2_pci_table, | ||
1240 | .probe = c2_probe, | ||
1241 | .remove = __devexit_p(c2_remove), | ||
1242 | }; | ||
1243 | |||
1244 | static int __init c2_init_module(void) | ||
1245 | { | ||
1246 | return pci_module_init(&c2_pci_driver); | ||
1247 | } | ||
1248 | |||
1249 | static void __exit c2_exit_module(void) | ||
1250 | { | ||
1251 | pci_unregister_driver(&c2_pci_driver); | ||
1252 | } | ||
1253 | |||
1254 | module_init(c2_init_module); | ||
1255 | module_exit(c2_exit_module); | ||