blob: 3b2a6c5980883b6d86e46542910586b29cb8d220 [file] [log] [blame]
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001/*
2 * Copyright (C) 2006-2007 PA Semi, Inc
3 *
4 * Driver for the PA Semi PWRficient onchip 1G/10G Ethernet MACs
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#include <linux/init.h>
21#include <linux/module.h>
22#include <linux/pci.h>
23#include <linux/interrupt.h>
24#include <linux/dmaengine.h>
25#include <linux/delay.h>
26#include <linux/netdevice.h>
27#include <linux/etherdevice.h>
28#include <asm/dma-mapping.h>
29#include <linux/in.h>
30#include <linux/skbuff.h>
31
32#include <linux/ip.h>
33#include <linux/tcp.h>
34#include <net/checksum.h>
Olof Johansson28ae79f2007-11-28 20:57:27 -060035#include <linux/inet_lro.h>
Olof Johanssonf5cd7872007-01-31 21:43:54 -060036
Olof Johansson771f7402007-05-08 00:47:21 -050037#include <asm/irq.h>
Olof Johanssonaf289e82007-10-03 13:03:54 -050038#include <asm/firmware.h>
Olof Johansson40afa532007-11-28 20:56:04 -060039#include <asm/pasemi_dma.h>
Olof Johansson771f7402007-05-08 00:47:21 -050040
Olof Johanssonf5cd7872007-01-31 21:43:54 -060041#include "pasemi_mac.h"
42
Olof Johansson8dc121a2007-10-02 16:26:53 -050043/* We have our own align, since ppc64 in general has it at 0 because
44 * of design flaws in some of the server bridge chips. However, for
45 * PWRficient doing the unaligned copies is more expensive than doing
46 * unaligned DMA, so make sure the data is aligned instead.
47 */
48#define LOCAL_SKB_ALIGN 2
Olof Johanssonf5cd7872007-01-31 21:43:54 -060049
50/* TODO list
51 *
Olof Johanssonf5cd7872007-01-31 21:43:54 -060052 * - Multicast support
53 * - Large MTU support
Olof Johansson7ddeae22007-10-02 16:27:28 -050054 * - SW LRO
55 * - Multiqueue RX/TX
Olof Johanssonf5cd7872007-01-31 21:43:54 -060056 */
57
Olof Johansson28ae79f2007-11-28 20:57:27 -060058#define LRO_MAX_AGGR 64
59
Olof Johanssonef1ea0b2008-01-23 13:56:47 -060060#define PE_MIN_MTU 64
Olof Johansson8d636d82008-03-05 16:34:16 -060061#define PE_MAX_MTU 9000
Olof Johanssonef1ea0b2008-01-23 13:56:47 -060062#define PE_DEF_MTU ETH_DATA_LEN
63
Olof Johanssonceb51362007-05-08 00:47:49 -050064#define DEFAULT_MSG_ENABLE \
65 (NETIF_MSG_DRV | \
66 NETIF_MSG_PROBE | \
67 NETIF_MSG_LINK | \
68 NETIF_MSG_TIMER | \
69 NETIF_MSG_IFDOWN | \
70 NETIF_MSG_IFUP | \
71 NETIF_MSG_RX_ERR | \
72 NETIF_MSG_TX_ERR)
73
Olof Johanssonceb51362007-05-08 00:47:49 -050074MODULE_LICENSE("GPL");
75MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
76MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver");
77
78static int debug = -1; /* -1 == use DEFAULT_MSG_ENABLE as value */
79module_param(debug, int, 0);
80MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value");
Olof Johanssonf5cd7872007-01-31 21:43:54 -060081
Olof Johanssone37c7722008-02-20 20:57:59 -060082extern const struct ethtool_ops pasemi_mac_ethtool_ops;
83
Olof Johanssonaf289e82007-10-03 13:03:54 -050084static int translation_enabled(void)
85{
86#if defined(CONFIG_PPC_PASEMI_IOMMU_DMA_FORCE)
87 return 1;
88#else
89 return firmware_has_feature(FW_FEATURE_LPAR);
90#endif
91}
92
Olof Johansson34c20622007-11-28 20:56:32 -060093static void write_iob_reg(unsigned int reg, unsigned int val)
Olof Johanssona85b9422007-09-15 13:40:59 -070094{
Olof Johansson34c20622007-11-28 20:56:32 -060095 pasemi_write_iob_reg(reg, val);
Olof Johanssona85b9422007-09-15 13:40:59 -070096}
97
Olof Johansson5c153322007-11-28 20:56:41 -060098static unsigned int read_mac_reg(const struct pasemi_mac *mac, unsigned int reg)
Olof Johanssona85b9422007-09-15 13:40:59 -070099{
Olof Johansson34c20622007-11-28 20:56:32 -0600100 return pasemi_read_mac_reg(mac->dma_if, reg);
Olof Johanssona85b9422007-09-15 13:40:59 -0700101}
102
Olof Johansson5c153322007-11-28 20:56:41 -0600103static void write_mac_reg(const struct pasemi_mac *mac, unsigned int reg,
Olof Johanssona85b9422007-09-15 13:40:59 -0700104 unsigned int val)
105{
Olof Johansson34c20622007-11-28 20:56:32 -0600106 pasemi_write_mac_reg(mac->dma_if, reg, val);
Olof Johanssona85b9422007-09-15 13:40:59 -0700107}
108
Olof Johansson34c20622007-11-28 20:56:32 -0600109static unsigned int read_dma_reg(unsigned int reg)
Olof Johanssona85b9422007-09-15 13:40:59 -0700110{
Olof Johansson34c20622007-11-28 20:56:32 -0600111 return pasemi_read_dma_reg(reg);
Olof Johanssona85b9422007-09-15 13:40:59 -0700112}
113
Olof Johansson34c20622007-11-28 20:56:32 -0600114static void write_dma_reg(unsigned int reg, unsigned int val)
Olof Johanssona85b9422007-09-15 13:40:59 -0700115{
Olof Johansson34c20622007-11-28 20:56:32 -0600116 pasemi_write_dma_reg(reg, val);
Olof Johanssona85b9422007-09-15 13:40:59 -0700117}
118
Olof Johansson5c153322007-11-28 20:56:41 -0600119static struct pasemi_mac_rxring *rx_ring(const struct pasemi_mac *mac)
Olof Johansson72b05b92007-11-28 20:54:28 -0600120{
121 return mac->rx;
122}
123
Olof Johansson5c153322007-11-28 20:56:41 -0600124static struct pasemi_mac_txring *tx_ring(const struct pasemi_mac *mac)
Olof Johansson72b05b92007-11-28 20:54:28 -0600125{
126 return mac->tx;
127}
128
Olof Johansson5c153322007-11-28 20:56:41 -0600129static inline void prefetch_skb(const struct sk_buff *skb)
130{
131 const void *d = skb;
132
133 prefetch(d);
134 prefetch(d+64);
135 prefetch(d+128);
136 prefetch(d+192);
137}
138
Olof Johansson34c20622007-11-28 20:56:32 -0600139static int mac_to_intf(struct pasemi_mac *mac)
140{
141 struct pci_dev *pdev = mac->pdev;
142 u32 tmp;
143 int nintf, off, i, j;
144 int devfn = pdev->devfn;
145
146 tmp = read_dma_reg(PAS_DMA_CAP_IFI);
147 nintf = (tmp & PAS_DMA_CAP_IFI_NIN_M) >> PAS_DMA_CAP_IFI_NIN_S;
148 off = (tmp & PAS_DMA_CAP_IFI_IOFF_M) >> PAS_DMA_CAP_IFI_IOFF_S;
149
150 /* IOFF contains the offset to the registers containing the
151 * DMA interface-to-MAC-pci-id mappings, and NIN contains number
152 * of total interfaces. Each register contains 4 devfns.
153 * Just do a linear search until we find the devfn of the MAC
154 * we're trying to look up.
155 */
156
157 for (i = 0; i < (nintf+3)/4; i++) {
158 tmp = read_dma_reg(off+4*i);
159 for (j = 0; j < 4; j++) {
160 if (((tmp >> (8*j)) & 0xff) == devfn)
161 return i*4 + j;
162 }
163 }
164 return -1;
165}
166
Olof Johanssonef1ea0b2008-01-23 13:56:47 -0600167static void pasemi_mac_intf_disable(struct pasemi_mac *mac)
168{
169 unsigned int flags;
170
171 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
172 flags &= ~PAS_MAC_CFG_PCFG_PE;
173 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
174}
175
176static void pasemi_mac_intf_enable(struct pasemi_mac *mac)
177{
178 unsigned int flags;
179
180 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
181 flags |= PAS_MAC_CFG_PCFG_PE;
182 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
183}
184
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600185static int pasemi_get_mac_addr(struct pasemi_mac *mac)
186{
187 struct pci_dev *pdev = mac->pdev;
188 struct device_node *dn = pci_device_to_OF_node(pdev);
olof@lixom.net1af7f052007-05-12 14:57:46 -0500189 int len;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600190 const u8 *maddr;
191 u8 addr[6];
192
193 if (!dn) {
194 dev_dbg(&pdev->dev,
195 "No device node for mac, not configuring\n");
196 return -ENOENT;
197 }
198
olof@lixom.net1af7f052007-05-12 14:57:46 -0500199 maddr = of_get_property(dn, "local-mac-address", &len);
Olof Johanssona5fd22e2007-05-08 00:48:02 -0500200
olof@lixom.net1af7f052007-05-12 14:57:46 -0500201 if (maddr && len == 6) {
202 memcpy(mac->mac_addr, maddr, 6);
203 return 0;
204 }
205
206 /* Some old versions of firmware mistakenly uses mac-address
207 * (and as a string) instead of a byte array in local-mac-address.
208 */
209
Olof Johanssona5fd22e2007-05-08 00:48:02 -0500210 if (maddr == NULL)
Linus Torvalds90287802007-05-08 11:57:17 -0700211 maddr = of_get_property(dn, "mac-address", NULL);
Olof Johanssona5fd22e2007-05-08 00:48:02 -0500212
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600213 if (maddr == NULL) {
214 dev_warn(&pdev->dev,
215 "no mac address in device tree, not configuring\n");
216 return -ENOENT;
217 }
218
219 if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
220 &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
221 dev_warn(&pdev->dev,
222 "can't parse mac address, not configuring\n");
223 return -EINVAL;
224 }
225
olof@lixom.net1af7f052007-05-12 14:57:46 -0500226 memcpy(mac->mac_addr, addr, 6);
227
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600228 return 0;
229}
230
Olof Johansson5cea73b2008-01-23 13:56:19 -0600231static int pasemi_mac_set_mac_addr(struct net_device *dev, void *p)
232{
233 struct pasemi_mac *mac = netdev_priv(dev);
234 struct sockaddr *addr = p;
235 unsigned int adr0, adr1;
236
237 if (!is_valid_ether_addr(addr->sa_data))
238 return -EINVAL;
239
240 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
241
242 adr0 = dev->dev_addr[2] << 24 |
243 dev->dev_addr[3] << 16 |
244 dev->dev_addr[4] << 8 |
245 dev->dev_addr[5];
246 adr1 = read_mac_reg(mac, PAS_MAC_CFG_ADR1);
247 adr1 &= ~0xffff;
248 adr1 |= dev->dev_addr[0] << 8 | dev->dev_addr[1];
249
250 pasemi_mac_intf_disable(mac);
251 write_mac_reg(mac, PAS_MAC_CFG_ADR0, adr0);
252 write_mac_reg(mac, PAS_MAC_CFG_ADR1, adr1);
253 pasemi_mac_intf_enable(mac);
254
255 return 0;
256}
257
Olof Johansson28ae79f2007-11-28 20:57:27 -0600258static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
259 void **tcph, u64 *hdr_flags, void *data)
260{
261 u64 macrx = (u64) data;
262 unsigned int ip_len;
263 struct iphdr *iph;
264
265 /* IPv4 header checksum failed */
266 if ((macrx & XCT_MACRX_HTY_M) != XCT_MACRX_HTY_IPV4_OK)
267 return -1;
268
269 /* non tcp packet */
270 skb_reset_network_header(skb);
271 iph = ip_hdr(skb);
272 if (iph->protocol != IPPROTO_TCP)
273 return -1;
274
275 ip_len = ip_hdrlen(skb);
276 skb_set_transport_header(skb, ip_len);
277 *tcph = tcp_hdr(skb);
278
279 /* check if ip header and tcp header are complete */
280 if (iph->tot_len < ip_len + tcp_hdrlen(skb))
281 return -1;
282
283 *hdr_flags = LRO_IPV4 | LRO_TCP;
284 *iphdr = iph;
285
286 return 0;
287}
288
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500289static int pasemi_mac_unmap_tx_skb(struct pasemi_mac *mac,
Olof Johansson7e9916e2007-11-28 20:57:45 -0600290 const int nfrags,
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500291 struct sk_buff *skb,
Olof Johansson5c153322007-11-28 20:56:41 -0600292 const dma_addr_t *dmas)
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500293{
294 int f;
Olof Johansson5c153322007-11-28 20:56:41 -0600295 struct pci_dev *pdev = mac->dma_pdev;
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500296
Olof Johansson5c153322007-11-28 20:56:41 -0600297 pci_unmap_single(pdev, dmas[0], skb_headlen(skb), PCI_DMA_TODEVICE);
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500298
299 for (f = 0; f < nfrags; f++) {
300 skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
301
Olof Johansson5c153322007-11-28 20:56:41 -0600302 pci_unmap_page(pdev, dmas[f+1], frag->size, PCI_DMA_TODEVICE);
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500303 }
304 dev_kfree_skb_irq(skb);
305
306 /* Freed descriptor slot + main SKB ptr + nfrags additional ptrs,
307 * aligned up to a power of 2
308 */
309 return (nfrags + 3) & ~1;
310}
311
Olof Johansson8d636d82008-03-05 16:34:16 -0600312static struct pasemi_mac_csring *pasemi_mac_setup_csring(struct pasemi_mac *mac)
313{
314 struct pasemi_mac_csring *ring;
315 u32 val;
316 unsigned int cfg;
317 int chno;
318
319 ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_csring),
320 offsetof(struct pasemi_mac_csring, chan));
321
322 if (!ring) {
323 dev_err(&mac->pdev->dev, "Can't allocate checksum channel\n");
324 goto out_chan;
325 }
326
327 chno = ring->chan.chno;
328
329 ring->size = CS_RING_SIZE;
330 ring->next_to_fill = 0;
331
332 /* Allocate descriptors */
333 if (pasemi_dma_alloc_ring(&ring->chan, CS_RING_SIZE))
334 goto out_ring_desc;
335
336 write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno),
337 PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma));
338 val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32);
339 val |= PAS_DMA_TXCHAN_BASEU_SIZ(CS_RING_SIZE >> 3);
340
341 write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val);
342
343 ring->events[0] = pasemi_dma_alloc_flag();
344 ring->events[1] = pasemi_dma_alloc_flag();
345 if (ring->events[0] < 0 || ring->events[1] < 0)
346 goto out_flags;
347
348 pasemi_dma_clear_flag(ring->events[0]);
349 pasemi_dma_clear_flag(ring->events[1]);
350
351 ring->fun = pasemi_dma_alloc_fun();
352 if (ring->fun < 0)
353 goto out_fun;
354
355 cfg = PAS_DMA_TXCHAN_CFG_TY_FUNC | PAS_DMA_TXCHAN_CFG_UP |
356 PAS_DMA_TXCHAN_CFG_TATTR(ring->fun) |
357 PAS_DMA_TXCHAN_CFG_LPSQ | PAS_DMA_TXCHAN_CFG_LPDQ;
358
359 if (translation_enabled())
360 cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR;
361
362 write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg);
363
364 /* enable channel */
365 pasemi_dma_start_chan(&ring->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ |
366 PAS_DMA_TXCHAN_TCMDSTA_DB |
367 PAS_DMA_TXCHAN_TCMDSTA_DE |
368 PAS_DMA_TXCHAN_TCMDSTA_DA);
369
370 return ring;
371
372out_fun:
373out_flags:
374 if (ring->events[0] >= 0)
375 pasemi_dma_free_flag(ring->events[0]);
376 if (ring->events[1] >= 0)
377 pasemi_dma_free_flag(ring->events[1]);
378 pasemi_dma_free_ring(&ring->chan);
379out_ring_desc:
380 pasemi_dma_free_chan(&ring->chan);
381out_chan:
382
383 return NULL;
384}
385
386static void pasemi_mac_setup_csrings(struct pasemi_mac *mac)
387{
388 int i;
389 mac->cs[0] = pasemi_mac_setup_csring(mac);
390 if (mac->type == MAC_TYPE_XAUI)
391 mac->cs[1] = pasemi_mac_setup_csring(mac);
392 else
393 mac->cs[1] = 0;
394
395 for (i = 0; i < MAX_CS; i++)
396 if (mac->cs[i])
397 mac->num_cs++;
398}
399
400static void pasemi_mac_free_csring(struct pasemi_mac_csring *csring)
401{
402 pasemi_dma_stop_chan(&csring->chan);
403 pasemi_dma_free_flag(csring->events[0]);
404 pasemi_dma_free_flag(csring->events[1]);
405 pasemi_dma_free_ring(&csring->chan);
406 pasemi_dma_free_chan(&csring->chan);
Olof Johansson1724ac22008-03-25 09:58:40 -0500407 pasemi_dma_free_fun(csring->fun);
Olof Johansson8d636d82008-03-05 16:34:16 -0600408}
409
Olof Johansson5c153322007-11-28 20:56:41 -0600410static int pasemi_mac_setup_rx_resources(const struct net_device *dev)
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600411{
412 struct pasemi_mac_rxring *ring;
413 struct pasemi_mac *mac = netdev_priv(dev);
Olof Johansson34c20622007-11-28 20:56:32 -0600414 int chno;
Olof Johanssonaf289e82007-10-03 13:03:54 -0500415 unsigned int cfg;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600416
Olof Johansson34c20622007-11-28 20:56:32 -0600417 ring = pasemi_dma_alloc_chan(RXCHAN, sizeof(struct pasemi_mac_rxring),
418 offsetof(struct pasemi_mac_rxring, chan));
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600419
Olof Johansson34c20622007-11-28 20:56:32 -0600420 if (!ring) {
421 dev_err(&mac->pdev->dev, "Can't allocate RX channel\n");
422 goto out_chan;
423 }
424 chno = ring->chan.chno;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600425
426 spin_lock_init(&ring->lock);
427
Olof Johansson021fa222007-08-22 09:13:11 -0500428 ring->size = RX_RING_SIZE;
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500429 ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600430 RX_RING_SIZE, GFP_KERNEL);
431
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500432 if (!ring->ring_info)
433 goto out_ring_info;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600434
435 /* Allocate descriptors */
Olof Johansson34c20622007-11-28 20:56:32 -0600436 if (pasemi_dma_alloc_ring(&ring->chan, RX_RING_SIZE))
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500437 goto out_ring_desc;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600438
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600439 ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev,
440 RX_RING_SIZE * sizeof(u64),
441 &ring->buf_dma, GFP_KERNEL);
442 if (!ring->buffers)
Olof Johansson34c20622007-11-28 20:56:32 -0600443 goto out_ring_desc;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600444
445 memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64));
446
Olof Johansson34c20622007-11-28 20:56:32 -0600447 write_dma_reg(PAS_DMA_RXCHAN_BASEL(chno),
448 PAS_DMA_RXCHAN_BASEL_BRBL(ring->chan.ring_dma));
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600449
Olof Johansson34c20622007-11-28 20:56:32 -0600450 write_dma_reg(PAS_DMA_RXCHAN_BASEU(chno),
451 PAS_DMA_RXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32) |
452 PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 3));
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600453
Olof Johansson5c153322007-11-28 20:56:41 -0600454 cfg = PAS_DMA_RXCHAN_CFG_HBU(2);
Olof Johanssonaf289e82007-10-03 13:03:54 -0500455
456 if (translation_enabled())
457 cfg |= PAS_DMA_RXCHAN_CFG_CTR;
458
Olof Johansson34c20622007-11-28 20:56:32 -0600459 write_dma_reg(PAS_DMA_RXCHAN_CFG(chno), cfg);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600460
Olof Johansson34c20622007-11-28 20:56:32 -0600461 write_dma_reg(PAS_DMA_RXINT_BASEL(mac->dma_if),
462 PAS_DMA_RXINT_BASEL_BRBL(ring->buf_dma));
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600463
Olof Johansson34c20622007-11-28 20:56:32 -0600464 write_dma_reg(PAS_DMA_RXINT_BASEU(mac->dma_if),
465 PAS_DMA_RXINT_BASEU_BRBH(ring->buf_dma >> 32) |
466 PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3));
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600467
Olof Johansson5c153322007-11-28 20:56:41 -0600468 cfg = PAS_DMA_RXINT_CFG_DHL(2) | PAS_DMA_RXINT_CFG_L2 |
Olof Johanssonaf289e82007-10-03 13:03:54 -0500469 PAS_DMA_RXINT_CFG_LW | PAS_DMA_RXINT_CFG_RBP |
470 PAS_DMA_RXINT_CFG_HEN;
471
472 if (translation_enabled())
473 cfg |= PAS_DMA_RXINT_CFG_ITRR | PAS_DMA_RXINT_CFG_ITR;
474
Olof Johansson34c20622007-11-28 20:56:32 -0600475 write_dma_reg(PAS_DMA_RXINT_CFG(mac->dma_if), cfg);
Olof Johanssonc0efd522007-08-22 09:12:52 -0500476
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600477 ring->next_to_fill = 0;
478 ring->next_to_clean = 0;
Olof Johansson72b05b92007-11-28 20:54:28 -0600479 ring->mac = mac;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600480 mac->rx = ring;
481
482 return 0;
483
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500484out_ring_desc:
485 kfree(ring->ring_info);
486out_ring_info:
Olof Johansson34c20622007-11-28 20:56:32 -0600487 pasemi_dma_free_chan(&ring->chan);
488out_chan:
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600489 return -ENOMEM;
490}
491
Olof Johansson72b05b92007-11-28 20:54:28 -0600492static struct pasemi_mac_txring *
Olof Johansson5c153322007-11-28 20:56:41 -0600493pasemi_mac_setup_tx_resources(const struct net_device *dev)
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600494{
495 struct pasemi_mac *mac = netdev_priv(dev);
496 u32 val;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600497 struct pasemi_mac_txring *ring;
Olof Johanssonaf289e82007-10-03 13:03:54 -0500498 unsigned int cfg;
Olof Johansson34c20622007-11-28 20:56:32 -0600499 int chno;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600500
Olof Johansson34c20622007-11-28 20:56:32 -0600501 ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_txring),
502 offsetof(struct pasemi_mac_txring, chan));
503
504 if (!ring) {
505 dev_err(&mac->pdev->dev, "Can't allocate TX channel\n");
506 goto out_chan;
507 }
508
509 chno = ring->chan.chno;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600510
511 spin_lock_init(&ring->lock);
512
Olof Johansson021fa222007-08-22 09:13:11 -0500513 ring->size = TX_RING_SIZE;
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500514 ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) *
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600515 TX_RING_SIZE, GFP_KERNEL);
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500516 if (!ring->ring_info)
517 goto out_ring_info;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600518
519 /* Allocate descriptors */
Olof Johansson34c20622007-11-28 20:56:32 -0600520 if (pasemi_dma_alloc_ring(&ring->chan, TX_RING_SIZE))
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500521 goto out_ring_desc;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600522
Olof Johansson34c20622007-11-28 20:56:32 -0600523 write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno),
524 PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma));
525 val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32);
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500526 val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 3);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600527
Olof Johansson34c20622007-11-28 20:56:32 -0600528 write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600529
Olof Johanssonaf289e82007-10-03 13:03:54 -0500530 cfg = PAS_DMA_TXCHAN_CFG_TY_IFACE |
531 PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) |
532 PAS_DMA_TXCHAN_CFG_UP |
Olof Johansson8d636d82008-03-05 16:34:16 -0600533 PAS_DMA_TXCHAN_CFG_WT(4);
Olof Johanssonaf289e82007-10-03 13:03:54 -0500534
535 if (translation_enabled())
536 cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR;
537
Olof Johansson34c20622007-11-28 20:56:32 -0600538 write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600539
Olof Johansson021fa222007-08-22 09:13:11 -0500540 ring->next_to_fill = 0;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600541 ring->next_to_clean = 0;
Olof Johansson72b05b92007-11-28 20:54:28 -0600542 ring->mac = mac;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600543
Olof Johansson72b05b92007-11-28 20:54:28 -0600544 return ring;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600545
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500546out_ring_desc:
547 kfree(ring->ring_info);
548out_ring_info:
Olof Johansson34c20622007-11-28 20:56:32 -0600549 pasemi_dma_free_chan(&ring->chan);
550out_chan:
Olof Johansson72b05b92007-11-28 20:54:28 -0600551 return NULL;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600552}
553
Olof Johansson72b05b92007-11-28 20:54:28 -0600554static void pasemi_mac_free_tx_resources(struct pasemi_mac *mac)
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600555{
Olof Johansson72b05b92007-11-28 20:54:28 -0600556 struct pasemi_mac_txring *txring = tx_ring(mac);
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500557 unsigned int i, j;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600558 struct pasemi_mac_buffer *info;
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500559 dma_addr_t dmas[MAX_SKB_FRAGS+1];
Olof Johansson7e9916e2007-11-28 20:57:45 -0600560 int freed, nfrags;
Olof Johanssonad5da102007-10-02 16:27:15 -0500561 int start, limit;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600562
Olof Johansson72b05b92007-11-28 20:54:28 -0600563 start = txring->next_to_clean;
564 limit = txring->next_to_fill;
Olof Johanssonad5da102007-10-02 16:27:15 -0500565
566 /* Compensate for when fill has wrapped and clean has not */
567 if (start > limit)
568 limit += TX_RING_SIZE;
569
570 for (i = start; i < limit; i += freed) {
Olof Johansson72b05b92007-11-28 20:54:28 -0600571 info = &txring->ring_info[(i+1) & (TX_RING_SIZE-1)];
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500572 if (info->dma && info->skb) {
Olof Johansson7e9916e2007-11-28 20:57:45 -0600573 nfrags = skb_shinfo(info->skb)->nr_frags;
574 for (j = 0; j <= nfrags; j++)
Olof Johansson72b05b92007-11-28 20:54:28 -0600575 dmas[j] = txring->ring_info[(i+1+j) &
576 (TX_RING_SIZE-1)].dma;
Olof Johansson7e9916e2007-11-28 20:57:45 -0600577 freed = pasemi_mac_unmap_tx_skb(mac, nfrags,
578 info->skb, dmas);
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500579 } else
580 freed = 2;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600581 }
582
Olof Johansson72b05b92007-11-28 20:54:28 -0600583 kfree(txring->ring_info);
Olof Johansson34c20622007-11-28 20:56:32 -0600584 pasemi_dma_free_chan(&txring->chan);
585
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600586}
587
Olof Johanssonef1ea0b2008-01-23 13:56:47 -0600588static void pasemi_mac_free_rx_buffers(struct pasemi_mac *mac)
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600589{
Olof Johansson72b05b92007-11-28 20:54:28 -0600590 struct pasemi_mac_rxring *rx = rx_ring(mac);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600591 unsigned int i;
592 struct pasemi_mac_buffer *info;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600593
594 for (i = 0; i < RX_RING_SIZE; i++) {
Olof Johansson72b05b92007-11-28 20:54:28 -0600595 info = &RX_DESC_INFO(rx, i);
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500596 if (info->skb && info->dma) {
597 pci_unmap_single(mac->dma_pdev,
598 info->dma,
599 info->skb->len,
600 PCI_DMA_FROMDEVICE);
601 dev_kfree_skb_any(info->skb);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600602 }
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500603 info->dma = 0;
604 info->skb = NULL;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600605 }
606
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500607 for (i = 0; i < RX_RING_SIZE; i++)
Olof Johanssonef1ea0b2008-01-23 13:56:47 -0600608 RX_BUFF(rx, i) = 0;
609}
610
611static void pasemi_mac_free_rx_resources(struct pasemi_mac *mac)
612{
613 pasemi_mac_free_rx_buffers(mac);
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500614
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600615 dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64),
Olof Johansson72b05b92007-11-28 20:54:28 -0600616 rx_ring(mac)->buffers, rx_ring(mac)->buf_dma);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600617
Olof Johansson72b05b92007-11-28 20:54:28 -0600618 kfree(rx_ring(mac)->ring_info);
Olof Johansson34c20622007-11-28 20:56:32 -0600619 pasemi_dma_free_chan(&rx_ring(mac)->chan);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600620 mac->rx = NULL;
621}
622
Olof Johansson5c153322007-11-28 20:56:41 -0600623static void pasemi_mac_replenish_rx_ring(const struct net_device *dev,
624 const int limit)
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600625{
Olof Johansson5c153322007-11-28 20:56:41 -0600626 const struct pasemi_mac *mac = netdev_priv(dev);
Olof Johansson72b05b92007-11-28 20:54:28 -0600627 struct pasemi_mac_rxring *rx = rx_ring(mac);
Olof Johanssonb5254ee2007-10-02 16:27:57 -0500628 int fill, count;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600629
Olof Johanssoncd4ceb22007-05-08 00:47:45 -0500630 if (limit <= 0)
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600631 return;
632
Olof Johansson72b05b92007-11-28 20:54:28 -0600633 fill = rx_ring(mac)->next_to_fill;
Olof Johansson928773c2007-09-26 16:25:06 -0500634 for (count = 0; count < limit; count++) {
Olof Johansson72b05b92007-11-28 20:54:28 -0600635 struct pasemi_mac_buffer *info = &RX_DESC_INFO(rx, fill);
636 u64 *buff = &RX_BUFF(rx, fill);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600637 struct sk_buff *skb;
638 dma_addr_t dma;
639
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500640 /* Entry in use? */
641 WARN_ON(*buff);
642
Olof Johanssonef1ea0b2008-01-23 13:56:47 -0600643 skb = dev_alloc_skb(mac->bufsz);
Olof Johansson5d894942007-11-28 20:57:56 -0600644 skb_reserve(skb, LOCAL_SKB_ALIGN);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600645
Olof Johansson9f05cfe2007-05-08 00:47:37 -0500646 if (unlikely(!skb))
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600647 break;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600648
Olof Johansson8dc121a2007-10-02 16:26:53 -0500649 dma = pci_map_single(mac->dma_pdev, skb->data,
Olof Johanssonef1ea0b2008-01-23 13:56:47 -0600650 mac->bufsz - LOCAL_SKB_ALIGN,
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600651 PCI_DMA_FROMDEVICE);
652
Olof Johanssoncd4ceb22007-05-08 00:47:45 -0500653 if (unlikely(dma_mapping_error(dma))) {
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600654 dev_kfree_skb_irq(info->skb);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600655 break;
656 }
657
658 info->skb = skb;
659 info->dma = dma;
Olof Johanssonef1ea0b2008-01-23 13:56:47 -0600660 *buff = XCT_RXB_LEN(mac->bufsz) | XCT_RXB_ADDR(dma);
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500661 fill++;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600662 }
663
664 wmb();
665
Olof Johansson34c20622007-11-28 20:56:32 -0600666 write_dma_reg(PAS_DMA_RXINT_INCR(mac->dma_if), count);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600667
Olof Johansson72b05b92007-11-28 20:54:28 -0600668 rx_ring(mac)->next_to_fill = (rx_ring(mac)->next_to_fill + count) &
Olof Johanssonb5254ee2007-10-02 16:27:57 -0500669 (RX_RING_SIZE - 1);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600670}
671
Olof Johansson5c153322007-11-28 20:56:41 -0600672static void pasemi_mac_restart_rx_intr(const struct pasemi_mac *mac)
Olof Johansson1b0335ea2007-05-08 00:47:26 -0500673{
Olof Johansson906674a2007-11-28 20:57:09 -0600674 struct pasemi_mac_rxring *rx = rx_ring(mac);
Olof Johansson52a94352007-05-12 18:01:09 -0500675 unsigned int reg, pcnt;
Olof Johansson1b0335ea2007-05-08 00:47:26 -0500676 /* Re-enable packet count interrupts: finally
677 * ack the packet count interrupt we got in rx_intr.
678 */
679
Olof Johansson906674a2007-11-28 20:57:09 -0600680 pcnt = *rx->chan.status & PAS_STATUS_PCNT_M;
Olof Johansson1b0335ea2007-05-08 00:47:26 -0500681
Olof Johansson52a94352007-05-12 18:01:09 -0500682 reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC;
Olof Johansson1b0335ea2007-05-08 00:47:26 -0500683
Olof Johansson906674a2007-11-28 20:57:09 -0600684 if (*rx->chan.status & PAS_STATUS_TIMER)
685 reg |= PAS_IOB_DMA_RXCH_RESET_TINTC;
686
Olof Johansson34c20622007-11-28 20:56:32 -0600687 write_iob_reg(PAS_IOB_DMA_RXCH_RESET(mac->rx->chan.chno), reg);
Olof Johansson1b0335ea2007-05-08 00:47:26 -0500688}
689
Olof Johansson5c153322007-11-28 20:56:41 -0600690static void pasemi_mac_restart_tx_intr(const struct pasemi_mac *mac)
Olof Johansson1b0335ea2007-05-08 00:47:26 -0500691{
Olof Johansson52a94352007-05-12 18:01:09 -0500692 unsigned int reg, pcnt;
Olof Johansson1b0335ea2007-05-08 00:47:26 -0500693
694 /* Re-enable packet count interrupts */
Olof Johansson34c20622007-11-28 20:56:32 -0600695 pcnt = *tx_ring(mac)->chan.status & PAS_STATUS_PCNT_M;
Olof Johansson1b0335ea2007-05-08 00:47:26 -0500696
Olof Johansson52a94352007-05-12 18:01:09 -0500697 reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC;
Olof Johansson1b0335ea2007-05-08 00:47:26 -0500698
Olof Johansson34c20622007-11-28 20:56:32 -0600699 write_iob_reg(PAS_IOB_DMA_TXCH_RESET(tx_ring(mac)->chan.chno), reg);
Olof Johansson1b0335ea2007-05-08 00:47:26 -0500700}
701
702
Olof Johansson5c153322007-11-28 20:56:41 -0600703static inline void pasemi_mac_rx_error(const struct pasemi_mac *mac,
704 const u64 macrx)
Olof Johansson69c29d82007-10-02 16:24:51 -0500705{
706 unsigned int rcmdsta, ccmdsta;
Olof Johansson34c20622007-11-28 20:56:32 -0600707 struct pasemi_dmachan *chan = &rx_ring(mac)->chan;
Olof Johansson69c29d82007-10-02 16:24:51 -0500708
709 if (!netif_msg_rx_err(mac))
710 return;
711
Olof Johansson34c20622007-11-28 20:56:32 -0600712 rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
713 ccmdsta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(chan->chno));
Olof Johansson69c29d82007-10-02 16:24:51 -0500714
715 printk(KERN_ERR "pasemi_mac: rx error. macrx %016lx, rx status %lx\n",
Olof Johansson34c20622007-11-28 20:56:32 -0600716 macrx, *chan->status);
Olof Johansson69c29d82007-10-02 16:24:51 -0500717
718 printk(KERN_ERR "pasemi_mac: rcmdsta %08x ccmdsta %08x\n",
719 rcmdsta, ccmdsta);
720}
721
Olof Johansson5c153322007-11-28 20:56:41 -0600722static inline void pasemi_mac_tx_error(const struct pasemi_mac *mac,
723 const u64 mactx)
Olof Johansson69c29d82007-10-02 16:24:51 -0500724{
725 unsigned int cmdsta;
Olof Johansson34c20622007-11-28 20:56:32 -0600726 struct pasemi_dmachan *chan = &tx_ring(mac)->chan;
Olof Johansson69c29d82007-10-02 16:24:51 -0500727
728 if (!netif_msg_tx_err(mac))
729 return;
730
Olof Johansson34c20622007-11-28 20:56:32 -0600731 cmdsta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(chan->chno));
Olof Johansson69c29d82007-10-02 16:24:51 -0500732
733 printk(KERN_ERR "pasemi_mac: tx error. mactx 0x%016lx, "\
Olof Johansson34c20622007-11-28 20:56:32 -0600734 "tx status 0x%016lx\n", mactx, *chan->status);
Olof Johansson69c29d82007-10-02 16:24:51 -0500735
736 printk(KERN_ERR "pasemi_mac: tcmdsta 0x%08x\n", cmdsta);
737}
738
Olof Johansson5c153322007-11-28 20:56:41 -0600739static int pasemi_mac_clean_rx(struct pasemi_mac_rxring *rx,
740 const int limit)
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600741{
Olof Johansson5c153322007-11-28 20:56:41 -0600742 const struct pasemi_dmachan *chan = &rx->chan;
Olof Johansson72b05b92007-11-28 20:54:28 -0600743 struct pasemi_mac *mac = rx->mac;
Olof Johansson5c153322007-11-28 20:56:41 -0600744 struct pci_dev *pdev = mac->dma_pdev;
Olof Johanssoncd4ceb22007-05-08 00:47:45 -0500745 unsigned int n;
Olof Johansson5c153322007-11-28 20:56:41 -0600746 int count, buf_index, tot_bytes, packets;
Olof Johanssoncd4ceb22007-05-08 00:47:45 -0500747 struct pasemi_mac_buffer *info;
748 struct sk_buff *skb;
Olof Johanssonb5254ee2007-10-02 16:27:57 -0500749 unsigned int len;
Olof Johansson5c153322007-11-28 20:56:41 -0600750 u64 macrx, eval;
Olof Johanssoncd4ceb22007-05-08 00:47:45 -0500751 dma_addr_t dma;
Olof Johansson5c153322007-11-28 20:56:41 -0600752
753 tot_bytes = 0;
754 packets = 0;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600755
Olof Johansson72b05b92007-11-28 20:54:28 -0600756 spin_lock(&rx->lock);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600757
Olof Johansson72b05b92007-11-28 20:54:28 -0600758 n = rx->next_to_clean;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600759
Olof Johansson72b05b92007-11-28 20:54:28 -0600760 prefetch(&RX_DESC(rx, n));
Olof Johanssonb5254ee2007-10-02 16:27:57 -0500761
762 for (count = 0; count < limit; count++) {
Olof Johansson72b05b92007-11-28 20:54:28 -0600763 macrx = RX_DESC(rx, n);
Olof Johansson5c153322007-11-28 20:56:41 -0600764 prefetch(&RX_DESC(rx, n+4));
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600765
Olof Johansson69c29d82007-10-02 16:24:51 -0500766 if ((macrx & XCT_MACRX_E) ||
Olof Johansson34c20622007-11-28 20:56:32 -0600767 (*chan->status & PAS_STATUS_ERROR))
Olof Johansson69c29d82007-10-02 16:24:51 -0500768 pasemi_mac_rx_error(mac, macrx);
769
Olof Johanssoncd4ceb22007-05-08 00:47:45 -0500770 if (!(macrx & XCT_MACRX_O))
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600771 break;
772
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600773 info = NULL;
774
Olof Johanssonb5254ee2007-10-02 16:27:57 -0500775 BUG_ON(!(macrx & XCT_MACRX_RR_8BRES));
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600776
Olof Johansson72b05b92007-11-28 20:54:28 -0600777 eval = (RX_DESC(rx, n+1) & XCT_RXRES_8B_EVAL_M) >>
Olof Johanssonb5254ee2007-10-02 16:27:57 -0500778 XCT_RXRES_8B_EVAL_S;
779 buf_index = eval-1;
780
Olof Johansson72b05b92007-11-28 20:54:28 -0600781 dma = (RX_DESC(rx, n+2) & XCT_PTR_ADDR_M);
782 info = &RX_DESC_INFO(rx, buf_index);
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500783
Olof Johansson9f05cfe2007-05-08 00:47:37 -0500784 skb = info->skb;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600785
Olof Johansson5c153322007-11-28 20:56:41 -0600786 prefetch_skb(skb);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600787
Olof Johanssoncd4ceb22007-05-08 00:47:45 -0500788 len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600789
Olof Johanssonef1ea0b2008-01-23 13:56:47 -0600790 pci_unmap_single(pdev, dma, mac->bufsz - LOCAL_SKB_ALIGN,
Olof Johansson5c153322007-11-28 20:56:41 -0600791 PCI_DMA_FROMDEVICE);
Olof Johansson32bee772007-11-06 22:21:38 -0600792
793 if (macrx & XCT_MACRX_CRC) {
794 /* CRC error flagged */
795 mac->netdev->stats.rx_errors++;
796 mac->netdev->stats.rx_crc_errors++;
Olof Johansson4352d822007-12-03 21:34:14 -0600797 /* No need to free skb, it'll be reused */
Olof Johansson32bee772007-11-06 22:21:38 -0600798 goto next;
799 }
800
Olof Johansson5d894942007-11-28 20:57:56 -0600801 info->skb = NULL;
Olof Johanssonad5da102007-10-02 16:27:15 -0500802 info->dma = 0;
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500803
Olof Johansson26fcfa92007-08-22 09:12:59 -0500804 if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
Olof Johansson38bf3182007-08-22 09:13:24 -0500805 skb->ip_summed = CHECKSUM_UNNECESSARY;
Olof Johanssoncd4ceb22007-05-08 00:47:45 -0500806 skb->csum = (macrx & XCT_MACRX_CSUM_M) >>
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600807 XCT_MACRX_CSUM_S;
808 } else
809 skb->ip_summed = CHECKSUM_NONE;
810
Olof Johansson5c153322007-11-28 20:56:41 -0600811 packets++;
812 tot_bytes += len;
813
814 /* Don't include CRC */
815 skb_put(skb, len-4);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600816
Olof Johansson26fcfa92007-08-22 09:12:59 -0500817 skb->protocol = eth_type_trans(skb, mac->netdev);
Olof Johansson28ae79f2007-11-28 20:57:27 -0600818 lro_receive_skb(&mac->lro_mgr, skb, (void *)macrx);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600819
Olof Johansson32bee772007-11-06 22:21:38 -0600820next:
Olof Johansson72b05b92007-11-28 20:54:28 -0600821 RX_DESC(rx, n) = 0;
822 RX_DESC(rx, n+1) = 0;
Olof Johanssoncd4ceb22007-05-08 00:47:45 -0500823
Olof Johanssonad5da102007-10-02 16:27:15 -0500824 /* Need to zero it out since hardware doesn't, since the
825 * replenish loop uses it to tell when it's done.
826 */
Olof Johansson72b05b92007-11-28 20:54:28 -0600827 RX_BUFF(rx, buf_index) = 0;
Olof Johanssonad5da102007-10-02 16:27:15 -0500828
Olof Johanssonb5254ee2007-10-02 16:27:57 -0500829 n += 4;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600830 }
831
Olof Johansson9a50beb2007-10-02 16:26:30 -0500832 if (n > RX_RING_SIZE) {
833 /* Errata 5971 workaround: L2 target of headers */
Olof Johansson34c20622007-11-28 20:56:32 -0600834 write_iob_reg(PAS_IOB_COM_PKTHDRCNT, 0);
Olof Johansson9a50beb2007-10-02 16:26:30 -0500835 n &= (RX_RING_SIZE-1);
836 }
Olof Johanssonb5254ee2007-10-02 16:27:57 -0500837
Olof Johansson72b05b92007-11-28 20:54:28 -0600838 rx_ring(mac)->next_to_clean = n;
Olof Johanssonb5254ee2007-10-02 16:27:57 -0500839
Olof Johansson28ae79f2007-11-28 20:57:27 -0600840 lro_flush_all(&mac->lro_mgr);
841
Olof Johanssonb5254ee2007-10-02 16:27:57 -0500842 /* Increase is in number of 16-byte entries, and since each descriptor
843 * with an 8BRES takes up 3x8 bytes (padded to 4x8), increase with
844 * count*2.
845 */
Olof Johansson34c20622007-11-28 20:56:32 -0600846 write_dma_reg(PAS_DMA_RXCHAN_INCR(mac->rx->chan.chno), count << 1);
Olof Johanssonb5254ee2007-10-02 16:27:57 -0500847
848 pasemi_mac_replenish_rx_ring(mac->netdev, count);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600849
Olof Johansson5c153322007-11-28 20:56:41 -0600850 mac->netdev->stats.rx_bytes += tot_bytes;
851 mac->netdev->stats.rx_packets += packets;
852
Olof Johansson72b05b92007-11-28 20:54:28 -0600853 spin_unlock(&rx_ring(mac)->lock);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600854
855 return count;
856}
857
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500858/* Can't make this too large or we blow the kernel stack limits */
859#define TX_CLEAN_BATCHSIZE (128/MAX_SKB_FRAGS)
860
Olof Johansson72b05b92007-11-28 20:54:28 -0600861static int pasemi_mac_clean_tx(struct pasemi_mac_txring *txring)
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600862{
Olof Johansson34c20622007-11-28 20:56:32 -0600863 struct pasemi_dmachan *chan = &txring->chan;
Olof Johansson72b05b92007-11-28 20:54:28 -0600864 struct pasemi_mac *mac = txring->mac;
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500865 int i, j;
Olof Johanssonad5da102007-10-02 16:27:15 -0500866 unsigned int start, descr_count, buf_count, batch_limit;
867 unsigned int ring_limit;
Olof Johansson02df6cf2007-08-22 09:13:03 -0500868 unsigned int total_count;
Olof Johanssonca7e2352007-09-26 16:23:59 -0500869 unsigned long flags;
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500870 struct sk_buff *skbs[TX_CLEAN_BATCHSIZE];
871 dma_addr_t dmas[TX_CLEAN_BATCHSIZE][MAX_SKB_FRAGS+1];
Olof Johansson7e9916e2007-11-28 20:57:45 -0600872 int nf[TX_CLEAN_BATCHSIZE];
873 int nr_frags;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600874
Olof Johansson02df6cf2007-08-22 09:13:03 -0500875 total_count = 0;
Olof Johanssonad5da102007-10-02 16:27:15 -0500876 batch_limit = TX_CLEAN_BATCHSIZE;
Olof Johansson02df6cf2007-08-22 09:13:03 -0500877restart:
Olof Johansson72b05b92007-11-28 20:54:28 -0600878 spin_lock_irqsave(&txring->lock, flags);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600879
Olof Johansson72b05b92007-11-28 20:54:28 -0600880 start = txring->next_to_clean;
881 ring_limit = txring->next_to_fill;
Olof Johanssonad5da102007-10-02 16:27:15 -0500882
Olof Johansson7e9916e2007-11-28 20:57:45 -0600883 prefetch(&TX_DESC_INFO(txring, start+1).skb);
884
Olof Johanssonad5da102007-10-02 16:27:15 -0500885 /* Compensate for when fill has wrapped but clean has not */
886 if (start > ring_limit)
887 ring_limit += TX_RING_SIZE;
Olof Johansson02df6cf2007-08-22 09:13:03 -0500888
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500889 buf_count = 0;
890 descr_count = 0;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600891
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500892 for (i = start;
Olof Johanssonad5da102007-10-02 16:27:15 -0500893 descr_count < batch_limit && i < ring_limit;
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500894 i += buf_count) {
Olof Johansson72b05b92007-11-28 20:54:28 -0600895 u64 mactx = TX_DESC(txring, i);
Olof Johanssonad5da102007-10-02 16:27:15 -0500896 struct sk_buff *skb;
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500897
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500898 if ((mactx & XCT_MACTX_E) ||
Olof Johansson34c20622007-11-28 20:56:32 -0600899 (*chan->status & PAS_STATUS_ERROR))
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500900 pasemi_mac_tx_error(mac, mactx);
Olof Johansson69c29d82007-10-02 16:24:51 -0500901
Olof Johansson8d636d82008-03-05 16:34:16 -0600902 /* Skip over control descriptors */
903 if (!(mactx & XCT_MACTX_LLEN_M)) {
904 TX_DESC(txring, i) = 0;
905 TX_DESC(txring, i+1) = 0;
906 buf_count = 2;
907 continue;
908 }
909
910 skb = TX_DESC_INFO(txring, i+1).skb;
911 nr_frags = TX_DESC_INFO(txring, i).dma;
912
Olof Johanssonfc9e4d22007-10-02 16:25:53 -0500913 if (unlikely(mactx & XCT_MACTX_O))
Olof Johansson02df6cf2007-08-22 09:13:03 -0500914 /* Not yet transmitted */
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600915 break;
916
Olof Johansson7e9916e2007-11-28 20:57:45 -0600917 buf_count = 2 + nr_frags;
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500918 /* Since we always fill with an even number of entries, make
919 * sure we skip any unused one at the end as well.
920 */
921 if (buf_count & 1)
922 buf_count++;
Olof Johansson7e9916e2007-11-28 20:57:45 -0600923
924 for (j = 0; j <= nr_frags; j++)
925 dmas[descr_count][j] = TX_DESC_INFO(txring, i+1+j).dma;
926
927 skbs[descr_count] = skb;
928 nf[descr_count] = nr_frags;
929
930 TX_DESC(txring, i) = 0;
931 TX_DESC(txring, i+1) = 0;
932
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500933 descr_count++;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600934 }
Olof Johansson72b05b92007-11-28 20:54:28 -0600935 txring->next_to_clean = i & (TX_RING_SIZE-1);
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500936
Olof Johansson72b05b92007-11-28 20:54:28 -0600937 spin_unlock_irqrestore(&txring->lock, flags);
Olof Johansson0ce68c72007-04-28 15:36:40 -0500938 netif_wake_queue(mac->netdev);
939
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500940 for (i = 0; i < descr_count; i++)
Olof Johansson7e9916e2007-11-28 20:57:45 -0600941 pasemi_mac_unmap_tx_skb(mac, nf[i], skbs[i], dmas[i]);
Olof Johansson02df6cf2007-08-22 09:13:03 -0500942
Olof Johanssonad3c20d2007-10-02 16:26:13 -0500943 total_count += descr_count;
Olof Johansson02df6cf2007-08-22 09:13:03 -0500944
945 /* If the batch was full, try to clean more */
Olof Johanssonad5da102007-10-02 16:27:15 -0500946 if (descr_count == batch_limit)
Olof Johansson02df6cf2007-08-22 09:13:03 -0500947 goto restart;
948
949 return total_count;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600950}
951
952
953static irqreturn_t pasemi_mac_rx_intr(int irq, void *data)
954{
Olof Johansson5c153322007-11-28 20:56:41 -0600955 const struct pasemi_mac_rxring *rxring = data;
Olof Johansson34c20622007-11-28 20:56:32 -0600956 struct pasemi_mac *mac = rxring->mac;
957 struct net_device *dev = mac->netdev;
Olof Johansson5c153322007-11-28 20:56:41 -0600958 const struct pasemi_dmachan *chan = &rxring->chan;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600959 unsigned int reg;
960
Olof Johansson34c20622007-11-28 20:56:32 -0600961 if (!(*chan->status & PAS_STATUS_CAUSE_M))
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600962 return IRQ_NONE;
963
Olof Johansson6dfa7522007-05-08 00:47:32 -0500964 /* Don't reset packet count so it won't fire again but clear
965 * all others.
966 */
967
Olof Johansson6dfa7522007-05-08 00:47:32 -0500968 reg = 0;
Olof Johansson34c20622007-11-28 20:56:32 -0600969 if (*chan->status & PAS_STATUS_SOFT)
Olof Johansson6dfa7522007-05-08 00:47:32 -0500970 reg |= PAS_IOB_DMA_RXCH_RESET_SINTC;
Olof Johansson34c20622007-11-28 20:56:32 -0600971 if (*chan->status & PAS_STATUS_ERROR)
Olof Johansson6dfa7522007-05-08 00:47:32 -0500972 reg |= PAS_IOB_DMA_RXCH_RESET_DINTC;
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600973
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700974 netif_rx_schedule(dev, &mac->napi);
Olof Johansson6dfa7522007-05-08 00:47:32 -0500975
Olof Johansson34c20622007-11-28 20:56:32 -0600976 write_iob_reg(PAS_IOB_DMA_RXCH_RESET(chan->chno), reg);
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600977
978 return IRQ_HANDLED;
979}
980
Olof Johansson61cec3b2007-11-28 20:56:54 -0600981#define TX_CLEAN_INTERVAL HZ
982
983static void pasemi_mac_tx_timer(unsigned long data)
984{
985 struct pasemi_mac_txring *txring = (struct pasemi_mac_txring *)data;
986 struct pasemi_mac *mac = txring->mac;
987
988 pasemi_mac_clean_tx(txring);
989
990 mod_timer(&txring->clean_timer, jiffies + TX_CLEAN_INTERVAL);
991
992 pasemi_mac_restart_tx_intr(mac);
993}
994
Olof Johanssonf5cd7872007-01-31 21:43:54 -0600995static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
996{
Olof Johansson72b05b92007-11-28 20:54:28 -0600997 struct pasemi_mac_txring *txring = data;
Olof Johansson5c153322007-11-28 20:56:41 -0600998 const struct pasemi_dmachan *chan = &txring->chan;
Olof Johansson61cec3b2007-11-28 20:56:54 -0600999 struct pasemi_mac *mac = txring->mac;
1000 unsigned int reg;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001001
Olof Johansson34c20622007-11-28 20:56:32 -06001002 if (!(*chan->status & PAS_STATUS_CAUSE_M))
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001003 return IRQ_NONE;
1004
Olof Johansson61cec3b2007-11-28 20:56:54 -06001005 reg = 0;
Olof Johansson6dfa7522007-05-08 00:47:32 -05001006
Olof Johansson34c20622007-11-28 20:56:32 -06001007 if (*chan->status & PAS_STATUS_SOFT)
Olof Johansson6dfa7522007-05-08 00:47:32 -05001008 reg |= PAS_IOB_DMA_TXCH_RESET_SINTC;
Olof Johansson34c20622007-11-28 20:56:32 -06001009 if (*chan->status & PAS_STATUS_ERROR)
Olof Johansson6dfa7522007-05-08 00:47:32 -05001010 reg |= PAS_IOB_DMA_TXCH_RESET_DINTC;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001011
Olof Johansson61cec3b2007-11-28 20:56:54 -06001012 mod_timer(&txring->clean_timer, jiffies + (TX_CLEAN_INTERVAL)*2);
1013
1014 netif_rx_schedule(mac->netdev, &mac->napi);
1015
1016 if (reg)
1017 write_iob_reg(PAS_IOB_DMA_TXCH_RESET(chan->chno), reg);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001018
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001019 return IRQ_HANDLED;
1020}
1021
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001022static void pasemi_adjust_link(struct net_device *dev)
1023{
1024 struct pasemi_mac *mac = netdev_priv(dev);
1025 int msg;
1026 unsigned int flags;
1027 unsigned int new_flags;
1028
1029 if (!mac->phydev->link) {
1030 /* If no link, MAC speed settings don't matter. Just report
1031 * link down and return.
1032 */
1033 if (mac->link && netif_msg_link(mac))
1034 printk(KERN_INFO "%s: Link is down.\n", dev->name);
1035
1036 netif_carrier_off(dev);
Olof Johanssonb0cd2f92007-11-28 20:58:25 -06001037 pasemi_mac_intf_disable(mac);
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001038 mac->link = 0;
1039
1040 return;
Olof Johanssonb0cd2f92007-11-28 20:58:25 -06001041 } else {
1042 pasemi_mac_intf_enable(mac);
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001043 netif_carrier_on(dev);
Olof Johanssonb0cd2f92007-11-28 20:58:25 -06001044 }
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001045
Olof Johanssona85b9422007-09-15 13:40:59 -07001046 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001047 new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M |
1048 PAS_MAC_CFG_PCFG_TSR_M);
1049
1050 if (!mac->phydev->duplex)
1051 new_flags |= PAS_MAC_CFG_PCFG_HD;
1052
1053 switch (mac->phydev->speed) {
1054 case 1000:
1055 new_flags |= PAS_MAC_CFG_PCFG_SPD_1G |
1056 PAS_MAC_CFG_PCFG_TSR_1G;
1057 break;
1058 case 100:
1059 new_flags |= PAS_MAC_CFG_PCFG_SPD_100M |
1060 PAS_MAC_CFG_PCFG_TSR_100M;
1061 break;
1062 case 10:
1063 new_flags |= PAS_MAC_CFG_PCFG_SPD_10M |
1064 PAS_MAC_CFG_PCFG_TSR_10M;
1065 break;
1066 default:
1067 printk("Unsupported speed %d\n", mac->phydev->speed);
1068 }
1069
1070 /* Print on link or speed/duplex change */
1071 msg = mac->link != mac->phydev->link || flags != new_flags;
1072
1073 mac->duplex = mac->phydev->duplex;
1074 mac->speed = mac->phydev->speed;
1075 mac->link = mac->phydev->link;
1076
1077 if (new_flags != flags)
Olof Johanssona85b9422007-09-15 13:40:59 -07001078 write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags);
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001079
1080 if (msg && netif_msg_link(mac))
1081 printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
1082 dev->name, mac->speed, mac->duplex ? "full" : "half");
1083}
1084
1085static int pasemi_mac_phy_init(struct net_device *dev)
1086{
1087 struct pasemi_mac *mac = netdev_priv(dev);
1088 struct device_node *dn, *phy_dn;
1089 struct phy_device *phydev;
1090 unsigned int phy_id;
1091 const phandle *ph;
1092 const unsigned int *prop;
1093 struct resource r;
1094 int ret;
1095
1096 dn = pci_device_to_OF_node(mac->pdev);
Linus Torvalds90287802007-05-08 11:57:17 -07001097 ph = of_get_property(dn, "phy-handle", NULL);
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001098 if (!ph)
1099 return -ENODEV;
1100 phy_dn = of_find_node_by_phandle(*ph);
1101
Linus Torvalds90287802007-05-08 11:57:17 -07001102 prop = of_get_property(phy_dn, "reg", NULL);
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001103 ret = of_address_to_resource(phy_dn->parent, 0, &r);
1104 if (ret)
1105 goto err;
1106
1107 phy_id = *prop;
Andy Fleming9d9326d2008-04-09 19:38:13 -05001108 snprintf(mac->phy_id, BUS_ID_SIZE, "%x:%02x", (int)r.start, phy_id);
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001109
1110 of_node_put(phy_dn);
1111
1112 mac->link = 0;
1113 mac->speed = 0;
1114 mac->duplex = -1;
1115
1116 phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
1117
1118 if (IS_ERR(phydev)) {
1119 printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
1120 return PTR_ERR(phydev);
1121 }
1122
1123 mac->phydev = phydev;
1124
1125 return 0;
1126
1127err:
1128 of_node_put(phy_dn);
1129 return -ENODEV;
1130}
1131
1132
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001133static int pasemi_mac_open(struct net_device *dev)
1134{
1135 struct pasemi_mac *mac = netdev_priv(dev);
1136 unsigned int flags;
Olof Johanssone37c7722008-02-20 20:57:59 -06001137 int i, ret;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001138
1139 flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) |
1140 PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) |
1141 PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12);
1142
Olof Johanssona85b9422007-09-15 13:40:59 -07001143 write_mac_reg(mac, PAS_MAC_CFG_TXP, flags);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001144
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001145 ret = pasemi_mac_setup_rx_resources(dev);
1146 if (ret)
1147 goto out_rx_resources;
1148
Olof Johansson34c20622007-11-28 20:56:32 -06001149 mac->tx = pasemi_mac_setup_tx_resources(dev);
Olof Johansson72b05b92007-11-28 20:54:28 -06001150
1151 if (!mac->tx)
1152 goto out_tx_ring;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001153
Olof Johansson1724ac22008-03-25 09:58:40 -05001154 /* We might already have allocated rings in case mtu was changed
1155 * before interface was brought up.
1156 */
1157 if (dev->mtu > 1500 && !mac->num_cs) {
Olof Johansson8d636d82008-03-05 16:34:16 -06001158 pasemi_mac_setup_csrings(mac);
1159 if (!mac->num_cs)
1160 goto out_tx_ring;
1161 }
1162
Olof Johanssone37c7722008-02-20 20:57:59 -06001163 /* Zero out rmon counters */
1164 for (i = 0; i < 32; i++)
1165 write_mac_reg(mac, PAS_MAC_RMON(i), 0);
1166
Olof Johansson906674a2007-11-28 20:57:09 -06001167 /* 0x3ff with 33MHz clock is about 31us */
1168 write_iob_reg(PAS_IOB_DMA_COM_TIMEOUTCFG,
1169 PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0x3ff));
1170
Olof Johansson34c20622007-11-28 20:56:32 -06001171 write_iob_reg(PAS_IOB_DMA_RXCH_CFG(mac->rx->chan.chno),
Olof Johansson28ae79f2007-11-28 20:57:27 -06001172 PAS_IOB_DMA_RXCH_CFG_CNTTH(256));
Olof Johansson34c20622007-11-28 20:56:32 -06001173
1174 write_iob_reg(PAS_IOB_DMA_TXCH_CFG(mac->tx->chan.chno),
Olof Johansson61cec3b2007-11-28 20:56:54 -06001175 PAS_IOB_DMA_TXCH_CFG_CNTTH(32));
Olof Johansson34c20622007-11-28 20:56:32 -06001176
Olof Johanssona85b9422007-09-15 13:40:59 -07001177 write_mac_reg(mac, PAS_MAC_IPC_CHNL,
Olof Johansson34c20622007-11-28 20:56:32 -06001178 PAS_MAC_IPC_CHNL_DCHNO(mac->rx->chan.chno) |
1179 PAS_MAC_IPC_CHNL_BCH(mac->rx->chan.chno));
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001180
1181 /* enable rx if */
Olof Johansson34c20622007-11-28 20:56:32 -06001182 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
1183 PAS_DMA_RXINT_RCMDSTA_EN |
1184 PAS_DMA_RXINT_RCMDSTA_DROPS_M |
1185 PAS_DMA_RXINT_RCMDSTA_BP |
1186 PAS_DMA_RXINT_RCMDSTA_OO |
1187 PAS_DMA_RXINT_RCMDSTA_BT);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001188
1189 /* enable rx channel */
Olof Johansson34c20622007-11-28 20:56:32 -06001190 pasemi_dma_start_chan(&rx_ring(mac)->chan, PAS_DMA_RXCHAN_CCMDSTA_DU |
1191 PAS_DMA_RXCHAN_CCMDSTA_OD |
1192 PAS_DMA_RXCHAN_CCMDSTA_FD |
1193 PAS_DMA_RXCHAN_CCMDSTA_DT);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001194
1195 /* enable tx channel */
Olof Johansson34c20622007-11-28 20:56:32 -06001196 pasemi_dma_start_chan(&tx_ring(mac)->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ |
1197 PAS_DMA_TXCHAN_TCMDSTA_DB |
1198 PAS_DMA_TXCHAN_TCMDSTA_DE |
1199 PAS_DMA_TXCHAN_TCMDSTA_DA);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001200
Olof Johansson928773c2007-09-26 16:25:06 -05001201 pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001202
Olof Johansson34c20622007-11-28 20:56:32 -06001203 write_dma_reg(PAS_DMA_RXCHAN_INCR(rx_ring(mac)->chan.chno),
1204 RX_RING_SIZE>>1);
Olof Johanssonb5254ee2007-10-02 16:27:57 -05001205
Olof Johansson72b05b92007-11-28 20:54:28 -06001206 /* Clear out any residual packet count state from firmware */
1207 pasemi_mac_restart_rx_intr(mac);
1208 pasemi_mac_restart_tx_intr(mac);
1209
Olof Johanssonb0cd2f92007-11-28 20:58:25 -06001210 flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE;
Olof Johansson36033762007-09-26 16:24:42 -05001211
1212 if (mac->type == MAC_TYPE_GMAC)
1213 flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G;
1214 else
1215 flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G;
1216
1217 /* Enable interface in MAC */
1218 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
1219
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001220 ret = pasemi_mac_phy_init(dev);
Olof Johanssonb0cd2f92007-11-28 20:58:25 -06001221 if (ret) {
1222 /* Since we won't get link notification, just enable RX */
1223 pasemi_mac_intf_enable(mac);
1224 if (mac->type == MAC_TYPE_GMAC) {
1225 /* Warn for missing PHY on SGMII (1Gig) ports */
1226 dev_warn(&mac->pdev->dev,
1227 "PHY init failed: %d.\n", ret);
1228 dev_warn(&mac->pdev->dev,
1229 "Defaulting to 1Gbit full duplex\n");
1230 }
Olof Johansson8304b632007-11-28 20:58:06 -06001231 }
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001232
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001233 netif_start_queue(dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001234 napi_enable(&mac->napi);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001235
Olof Johansson72b05b92007-11-28 20:54:28 -06001236 snprintf(mac->tx_irq_name, sizeof(mac->tx_irq_name), "%s tx",
1237 dev->name);
Olof Johansson771f7402007-05-08 00:47:21 -05001238
Olof Johansson34c20622007-11-28 20:56:32 -06001239 ret = request_irq(mac->tx->chan.irq, &pasemi_mac_tx_intr, IRQF_DISABLED,
Olof Johansson72b05b92007-11-28 20:54:28 -06001240 mac->tx_irq_name, mac->tx);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001241 if (ret) {
1242 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
Olof Johansson34c20622007-11-28 20:56:32 -06001243 mac->tx->chan.irq, ret);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001244 goto out_tx_int;
1245 }
1246
Olof Johansson72b05b92007-11-28 20:54:28 -06001247 snprintf(mac->rx_irq_name, sizeof(mac->rx_irq_name), "%s rx",
1248 dev->name);
1249
Olof Johansson34c20622007-11-28 20:56:32 -06001250 ret = request_irq(mac->rx->chan.irq, &pasemi_mac_rx_intr, IRQF_DISABLED,
1251 mac->rx_irq_name, mac->rx);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001252 if (ret) {
1253 dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n",
Olof Johansson34c20622007-11-28 20:56:32 -06001254 mac->rx->chan.irq, ret);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001255 goto out_rx_int;
1256 }
1257
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001258 if (mac->phydev)
1259 phy_start(mac->phydev);
1260
Olof Johansson61cec3b2007-11-28 20:56:54 -06001261 init_timer(&mac->tx->clean_timer);
1262 mac->tx->clean_timer.function = pasemi_mac_tx_timer;
1263 mac->tx->clean_timer.data = (unsigned long)mac->tx;
1264 mac->tx->clean_timer.expires = jiffies+HZ;
1265 add_timer(&mac->tx->clean_timer);
1266
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001267 return 0;
1268
1269out_rx_int:
Olof Johansson34c20622007-11-28 20:56:32 -06001270 free_irq(mac->tx->chan.irq, mac->tx);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001271out_tx_int:
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001272 napi_disable(&mac->napi);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001273 netif_stop_queue(dev);
Olof Johansson72b05b92007-11-28 20:54:28 -06001274out_tx_ring:
1275 if (mac->tx)
1276 pasemi_mac_free_tx_resources(mac);
1277 pasemi_mac_free_rx_resources(mac);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001278out_rx_resources:
1279
1280 return ret;
1281}
1282
1283#define MAX_RETRIES 5000
1284
Olof Johanssonef1ea0b2008-01-23 13:56:47 -06001285static void pasemi_mac_pause_txchan(struct pasemi_mac *mac)
1286{
1287 unsigned int sta, retries;
1288 int txch = tx_ring(mac)->chan.chno;
1289
1290 write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch),
1291 PAS_DMA_TXCHAN_TCMDSTA_ST);
1292
1293 for (retries = 0; retries < MAX_RETRIES; retries++) {
1294 sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch));
1295 if (!(sta & PAS_DMA_TXCHAN_TCMDSTA_ACT))
1296 break;
1297 cond_resched();
1298 }
1299
1300 if (sta & PAS_DMA_TXCHAN_TCMDSTA_ACT)
1301 dev_err(&mac->dma_pdev->dev,
1302 "Failed to stop tx channel, tcmdsta %08x\n", sta);
1303
1304 write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch), 0);
1305}
1306
1307static void pasemi_mac_pause_rxchan(struct pasemi_mac *mac)
1308{
1309 unsigned int sta, retries;
1310 int rxch = rx_ring(mac)->chan.chno;
1311
1312 write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch),
1313 PAS_DMA_RXCHAN_CCMDSTA_ST);
1314 for (retries = 0; retries < MAX_RETRIES; retries++) {
1315 sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch));
1316 if (!(sta & PAS_DMA_RXCHAN_CCMDSTA_ACT))
1317 break;
1318 cond_resched();
1319 }
1320
1321 if (sta & PAS_DMA_RXCHAN_CCMDSTA_ACT)
1322 dev_err(&mac->dma_pdev->dev,
1323 "Failed to stop rx channel, ccmdsta 08%x\n", sta);
1324 write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch), 0);
1325}
1326
1327static void pasemi_mac_pause_rxint(struct pasemi_mac *mac)
1328{
1329 unsigned int sta, retries;
1330
1331 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
1332 PAS_DMA_RXINT_RCMDSTA_ST);
1333 for (retries = 0; retries < MAX_RETRIES; retries++) {
1334 sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
1335 if (!(sta & PAS_DMA_RXINT_RCMDSTA_ACT))
1336 break;
1337 cond_resched();
1338 }
1339
1340 if (sta & PAS_DMA_RXINT_RCMDSTA_ACT)
1341 dev_err(&mac->dma_pdev->dev,
1342 "Failed to stop rx interface, rcmdsta %08x\n", sta);
1343 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0);
1344}
1345
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001346static int pasemi_mac_close(struct net_device *dev)
1347{
1348 struct pasemi_mac *mac = netdev_priv(dev);
Olof Johansson9e81d332007-10-02 16:27:39 -05001349 unsigned int sta;
Olof Johansson8d636d82008-03-05 16:34:16 -06001350 int rxch, txch, i;
Olof Johansson34c20622007-11-28 20:56:32 -06001351
1352 rxch = rx_ring(mac)->chan.chno;
1353 txch = tx_ring(mac)->chan.chno;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001354
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001355 if (mac->phydev) {
1356 phy_stop(mac->phydev);
1357 phy_disconnect(mac->phydev);
1358 }
1359
Olof Johansson61cec3b2007-11-28 20:56:54 -06001360 del_timer_sync(&mac->tx->clean_timer);
1361
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001362 netif_stop_queue(dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001363 napi_disable(&mac->napi);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001364
Olof Johansson34c20622007-11-28 20:56:32 -06001365 sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
Olof Johansson9e81d332007-10-02 16:27:39 -05001366 if (sta & (PAS_DMA_RXINT_RCMDSTA_BP |
1367 PAS_DMA_RXINT_RCMDSTA_OO |
1368 PAS_DMA_RXINT_RCMDSTA_BT))
1369 printk(KERN_DEBUG "pasemi_mac: rcmdsta error: 0x%08x\n", sta);
1370
Olof Johansson34c20622007-11-28 20:56:32 -06001371 sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch));
Olof Johansson9e81d332007-10-02 16:27:39 -05001372 if (sta & (PAS_DMA_RXCHAN_CCMDSTA_DU |
1373 PAS_DMA_RXCHAN_CCMDSTA_OD |
1374 PAS_DMA_RXCHAN_CCMDSTA_FD |
1375 PAS_DMA_RXCHAN_CCMDSTA_DT))
1376 printk(KERN_DEBUG "pasemi_mac: ccmdsta error: 0x%08x\n", sta);
1377
Olof Johansson34c20622007-11-28 20:56:32 -06001378 sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch));
Olof Johansson72b05b92007-11-28 20:54:28 -06001379 if (sta & (PAS_DMA_TXCHAN_TCMDSTA_SZ | PAS_DMA_TXCHAN_TCMDSTA_DB |
1380 PAS_DMA_TXCHAN_TCMDSTA_DE | PAS_DMA_TXCHAN_TCMDSTA_DA))
Olof Johansson9e81d332007-10-02 16:27:39 -05001381 printk(KERN_DEBUG "pasemi_mac: tcmdsta error: 0x%08x\n", sta);
1382
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001383 /* Clean out any pending buffers */
Olof Johansson72b05b92007-11-28 20:54:28 -06001384 pasemi_mac_clean_tx(tx_ring(mac));
1385 pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001386
Olof Johanssonef1ea0b2008-01-23 13:56:47 -06001387 pasemi_mac_pause_txchan(mac);
1388 pasemi_mac_pause_rxint(mac);
1389 pasemi_mac_pause_rxchan(mac);
Olof Johansson1145d952008-01-23 13:57:19 -06001390 pasemi_mac_intf_disable(mac);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001391
Olof Johansson34c20622007-11-28 20:56:32 -06001392 free_irq(mac->tx->chan.irq, mac->tx);
1393 free_irq(mac->rx->chan.irq, mac->rx);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001394
Olof Johansson1724ac22008-03-25 09:58:40 -05001395 for (i = 0; i < mac->num_cs; i++) {
Olof Johansson8d636d82008-03-05 16:34:16 -06001396 pasemi_mac_free_csring(mac->cs[i]);
Olof Johansson1724ac22008-03-25 09:58:40 -05001397 mac->cs[i] = NULL;
1398 }
1399
1400 mac->num_cs = 0;
Olof Johansson8d636d82008-03-05 16:34:16 -06001401
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001402 /* Free resources */
Olof Johansson72b05b92007-11-28 20:54:28 -06001403 pasemi_mac_free_rx_resources(mac);
1404 pasemi_mac_free_tx_resources(mac);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001405
1406 return 0;
1407}
1408
Olof Johansson8d636d82008-03-05 16:34:16 -06001409static void pasemi_mac_queue_csdesc(const struct sk_buff *skb,
1410 const dma_addr_t *map,
1411 const unsigned int *map_size,
1412 struct pasemi_mac_txring *txring,
1413 struct pasemi_mac_csring *csring)
1414{
1415 u64 fund;
1416 dma_addr_t cs_dest;
1417 const int nh_off = skb_network_offset(skb);
1418 const int nh_len = skb_network_header_len(skb);
1419 const int nfrags = skb_shinfo(skb)->nr_frags;
1420 int cs_size, i, fill, hdr, cpyhdr, evt;
1421 dma_addr_t csdma;
1422
1423 fund = XCT_FUN_ST | XCT_FUN_RR_8BRES |
1424 XCT_FUN_O | XCT_FUN_FUN(csring->fun) |
1425 XCT_FUN_CRM_SIG | XCT_FUN_LLEN(skb->len - nh_off) |
1426 XCT_FUN_SHL(nh_len >> 2) | XCT_FUN_SE;
1427
1428 switch (ip_hdr(skb)->protocol) {
1429 case IPPROTO_TCP:
1430 fund |= XCT_FUN_SIG_TCP4;
1431 /* TCP checksum is 16 bytes into the header */
1432 cs_dest = map[0] + skb_transport_offset(skb) + 16;
1433 break;
1434 case IPPROTO_UDP:
1435 fund |= XCT_FUN_SIG_UDP4;
1436 /* UDP checksum is 6 bytes into the header */
1437 cs_dest = map[0] + skb_transport_offset(skb) + 6;
1438 break;
1439 default:
1440 BUG();
1441 }
1442
1443 /* Do the checksum offloaded */
1444 fill = csring->next_to_fill;
1445 hdr = fill;
1446
1447 CS_DESC(csring, fill++) = fund;
1448 /* Room for 8BRES. Checksum result is really 2 bytes into it */
1449 csdma = csring->chan.ring_dma + (fill & (CS_RING_SIZE-1)) * 8 + 2;
1450 CS_DESC(csring, fill++) = 0;
1451
1452 CS_DESC(csring, fill) = XCT_PTR_LEN(map_size[0]-nh_off) | XCT_PTR_ADDR(map[0]+nh_off);
1453 for (i = 1; i <= nfrags; i++)
1454 CS_DESC(csring, fill+i) = XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]);
1455
1456 fill += i;
1457 if (fill & 1)
1458 fill++;
1459
1460 /* Copy the result into the TCP packet */
1461 cpyhdr = fill;
1462 CS_DESC(csring, fill++) = XCT_FUN_O | XCT_FUN_FUN(csring->fun) |
1463 XCT_FUN_LLEN(2) | XCT_FUN_SE;
1464 CS_DESC(csring, fill++) = XCT_PTR_LEN(2) | XCT_PTR_ADDR(cs_dest) | XCT_PTR_T;
1465 CS_DESC(csring, fill++) = XCT_PTR_LEN(2) | XCT_PTR_ADDR(csdma);
1466 fill++;
1467
1468 evt = !csring->last_event;
1469 csring->last_event = evt;
1470
1471 /* Event handshaking with MAC TX */
1472 CS_DESC(csring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1473 CTRL_CMD_ETYPE_SET | CTRL_CMD_REG(csring->events[evt]);
1474 CS_DESC(csring, fill++) = 0;
1475 CS_DESC(csring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1476 CTRL_CMD_ETYPE_WCLR | CTRL_CMD_REG(csring->events[!evt]);
1477 CS_DESC(csring, fill++) = 0;
1478 csring->next_to_fill = fill & (CS_RING_SIZE-1);
1479
1480 cs_size = fill - hdr;
1481 write_dma_reg(PAS_DMA_TXCHAN_INCR(csring->chan.chno), (cs_size) >> 1);
1482
1483 /* TX-side event handshaking */
1484 fill = txring->next_to_fill;
1485 TX_DESC(txring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1486 CTRL_CMD_ETYPE_WSET | CTRL_CMD_REG(csring->events[evt]);
1487 TX_DESC(txring, fill++) = 0;
1488 TX_DESC(txring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O |
1489 CTRL_CMD_ETYPE_CLR | CTRL_CMD_REG(csring->events[!evt]);
1490 TX_DESC(txring, fill++) = 0;
1491 txring->next_to_fill = fill;
1492
1493 write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), 2);
1494
1495 return;
1496}
1497
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001498static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
1499{
Olof Johansson8d636d82008-03-05 16:34:16 -06001500 struct pasemi_mac * const mac = netdev_priv(dev);
1501 struct pasemi_mac_txring * const txring = tx_ring(mac);
1502 struct pasemi_mac_csring *csring;
1503 u64 dflags = 0;
1504 u64 mactx;
Olof Johanssonad3c20d2007-10-02 16:26:13 -05001505 dma_addr_t map[MAX_SKB_FRAGS+1];
1506 unsigned int map_size[MAX_SKB_FRAGS+1];
Olof Johanssonca7e2352007-09-26 16:23:59 -05001507 unsigned long flags;
Olof Johanssonad3c20d2007-10-02 16:26:13 -05001508 int i, nfrags;
Olof Johansson5c153322007-11-28 20:56:41 -06001509 int fill;
Olof Johansson8d636d82008-03-05 16:34:16 -06001510 const int nh_off = skb_network_offset(skb);
1511 const int nh_len = skb_network_header_len(skb);
1512
1513 prefetch(&txring->ring_info);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001514
Olof Johanssondbd62af2007-11-06 22:20:39 -06001515 dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_CRC_PAD;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001516
Olof Johanssonad3c20d2007-10-02 16:26:13 -05001517 nfrags = skb_shinfo(skb)->nr_frags;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001518
Olof Johanssonad3c20d2007-10-02 16:26:13 -05001519 map[0] = pci_map_single(mac->dma_pdev, skb->data, skb_headlen(skb),
1520 PCI_DMA_TODEVICE);
1521 map_size[0] = skb_headlen(skb);
1522 if (dma_mapping_error(map[0]))
1523 goto out_err_nolock;
1524
1525 for (i = 0; i < nfrags; i++) {
1526 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1527
1528 map[i+1] = pci_map_page(mac->dma_pdev, frag->page,
1529 frag->page_offset, frag->size,
1530 PCI_DMA_TODEVICE);
1531 map_size[i+1] = frag->size;
1532 if (dma_mapping_error(map[i+1])) {
1533 nfrags = i;
1534 goto out_err_nolock;
1535 }
1536 }
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001537
Olof Johansson8d636d82008-03-05 16:34:16 -06001538 if (skb->ip_summed == CHECKSUM_PARTIAL && skb->len <= 1540) {
1539 switch (ip_hdr(skb)->protocol) {
1540 case IPPROTO_TCP:
1541 dflags |= XCT_MACTX_CSUM_TCP;
1542 dflags |= XCT_MACTX_IPH(nh_len >> 2);
1543 dflags |= XCT_MACTX_IPO(nh_off);
1544 break;
1545 case IPPROTO_UDP:
1546 dflags |= XCT_MACTX_CSUM_UDP;
1547 dflags |= XCT_MACTX_IPH(nh_len >> 2);
1548 dflags |= XCT_MACTX_IPO(nh_off);
1549 break;
1550 default:
1551 WARN_ON(1);
1552 }
1553 }
1554
Olof Johansson26fcfa92007-08-22 09:12:59 -05001555 mactx = dflags | XCT_MACTX_LLEN(skb->len);
Olof Johansson26fcfa92007-08-22 09:12:59 -05001556
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001557 spin_lock_irqsave(&txring->lock, flags);
1558
Olof Johanssonad5da102007-10-02 16:27:15 -05001559 /* Avoid stepping on the same cache line that the DMA controller
1560 * is currently about to send, so leave at least 8 words available.
1561 * Total free space needed is mactx + fragments + 8
1562 */
Olof Johansson8d636d82008-03-05 16:34:16 -06001563 if (RING_AVAIL(txring) < nfrags + 14) {
Olof Johanssonad5da102007-10-02 16:27:15 -05001564 /* no room -- stop the queue and wait for tx intr */
1565 netif_stop_queue(dev);
1566 goto out_err;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001567 }
1568
Olof Johansson8d636d82008-03-05 16:34:16 -06001569 /* Queue up checksum + event descriptors, if needed */
1570 if (mac->num_cs && skb->ip_summed == CHECKSUM_PARTIAL && skb->len > 1540) {
1571 csring = mac->cs[mac->last_cs];
1572 mac->last_cs = (mac->last_cs + 1) % mac->num_cs;
1573
1574 pasemi_mac_queue_csdesc(skb, map, map_size, txring, csring);
1575 }
1576
1577 fill = txring->next_to_fill;
Olof Johansson5c153322007-11-28 20:56:41 -06001578 TX_DESC(txring, fill) = mactx;
Olof Johansson7e9916e2007-11-28 20:57:45 -06001579 TX_DESC_INFO(txring, fill).dma = nfrags;
Olof Johansson5c153322007-11-28 20:56:41 -06001580 fill++;
1581 TX_DESC_INFO(txring, fill).skb = skb;
Olof Johanssonad3c20d2007-10-02 16:26:13 -05001582 for (i = 0; i <= nfrags; i++) {
Olof Johansson5c153322007-11-28 20:56:41 -06001583 TX_DESC(txring, fill+i) =
Olof Johansson72b05b92007-11-28 20:54:28 -06001584 XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]);
Olof Johansson5c153322007-11-28 20:56:41 -06001585 TX_DESC_INFO(txring, fill+i).dma = map[i];
Olof Johanssonad3c20d2007-10-02 16:26:13 -05001586 }
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001587
Olof Johanssonad3c20d2007-10-02 16:26:13 -05001588 /* We have to add an even number of 8-byte entries to the ring
1589 * even if the last one is unused. That means always an odd number
1590 * of pointers + one mactx descriptor.
1591 */
1592 if (nfrags & 1)
1593 nfrags++;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001594
Olof Johansson5c153322007-11-28 20:56:41 -06001595 txring->next_to_fill = (fill + nfrags + 1) & (TX_RING_SIZE-1);
Olof Johanssonfc9e4d22007-10-02 16:25:53 -05001596
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001597 dev->stats.tx_packets++;
1598 dev->stats.tx_bytes += skb->len;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001599
1600 spin_unlock_irqrestore(&txring->lock, flags);
1601
Olof Johansson34c20622007-11-28 20:56:32 -06001602 write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), (nfrags+2) >> 1);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001603
1604 return NETDEV_TX_OK;
1605
1606out_err:
1607 spin_unlock_irqrestore(&txring->lock, flags);
Olof Johanssonad3c20d2007-10-02 16:26:13 -05001608out_err_nolock:
1609 while (nfrags--)
1610 pci_unmap_single(mac->dma_pdev, map[nfrags], map_size[nfrags],
1611 PCI_DMA_TODEVICE);
1612
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001613 return NETDEV_TX_BUSY;
1614}
1615
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001616static void pasemi_mac_set_rx_mode(struct net_device *dev)
1617{
Olof Johansson5c153322007-11-28 20:56:41 -06001618 const struct pasemi_mac *mac = netdev_priv(dev);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001619 unsigned int flags;
1620
Olof Johanssona85b9422007-09-15 13:40:59 -07001621 flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001622
1623 /* Set promiscuous */
1624 if (dev->flags & IFF_PROMISC)
1625 flags |= PAS_MAC_CFG_PCFG_PR;
1626 else
1627 flags &= ~PAS_MAC_CFG_PCFG_PR;
1628
Olof Johanssona85b9422007-09-15 13:40:59 -07001629 write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001630}
1631
1632
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001633static int pasemi_mac_poll(struct napi_struct *napi, int budget)
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001634{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001635 struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi);
1636 struct net_device *dev = mac->netdev;
1637 int pkts;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001638
Olof Johansson72b05b92007-11-28 20:54:28 -06001639 pasemi_mac_clean_tx(tx_ring(mac));
1640 pkts = pasemi_mac_clean_rx(rx_ring(mac), budget);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001641 if (pkts < budget) {
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001642 /* all done, no more packets present */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001643 netif_rx_complete(dev, napi);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001644
Olof Johansson1b0335ea2007-05-08 00:47:26 -05001645 pasemi_mac_restart_rx_intr(mac);
Olof Johansson61cec3b2007-11-28 20:56:54 -06001646 pasemi_mac_restart_tx_intr(mac);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001647 }
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001648 return pkts;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001649}
1650
Nate Case6e620402008-03-21 17:02:42 -05001651#ifdef CONFIG_NET_POLL_CONTROLLER
1652/*
1653 * Polling 'interrupt' - used by things like netconsole to send skbs
1654 * without having to re-enable interrupts. It's not called while
1655 * the interrupt routine is executing.
1656 */
1657static void pasemi_mac_netpoll(struct net_device *dev)
1658{
1659 const struct pasemi_mac *mac = netdev_priv(dev);
1660
1661 disable_irq(mac->tx->chan.irq);
1662 pasemi_mac_tx_intr(mac->tx->chan.irq, mac->tx);
1663 enable_irq(mac->tx->chan.irq);
1664
1665 disable_irq(mac->rx->chan.irq);
1666 pasemi_mac_rx_intr(mac->rx->chan.irq, mac->rx);
1667 enable_irq(mac->rx->chan.irq);
1668}
1669#endif
1670
Olof Johanssonef1ea0b2008-01-23 13:56:47 -06001671static int pasemi_mac_change_mtu(struct net_device *dev, int new_mtu)
1672{
1673 struct pasemi_mac *mac = netdev_priv(dev);
1674 unsigned int reg;
Olof Johansson8d636d82008-03-05 16:34:16 -06001675 unsigned int rcmdsta = 0;
Olof Johanssonef1ea0b2008-01-23 13:56:47 -06001676 int running;
Olof Johansson8d636d82008-03-05 16:34:16 -06001677 int ret = 0;
Olof Johanssonef1ea0b2008-01-23 13:56:47 -06001678
1679 if (new_mtu < PE_MIN_MTU || new_mtu > PE_MAX_MTU)
1680 return -EINVAL;
1681
1682 running = netif_running(dev);
1683
1684 if (running) {
1685 /* Need to stop the interface, clean out all already
1686 * received buffers, free all unused buffers on the RX
1687 * interface ring, then finally re-fill the rx ring with
1688 * the new-size buffers and restart.
1689 */
1690
1691 napi_disable(&mac->napi);
1692 netif_tx_disable(dev);
1693 pasemi_mac_intf_disable(mac);
1694
1695 rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if));
1696 pasemi_mac_pause_rxint(mac);
1697 pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE);
1698 pasemi_mac_free_rx_buffers(mac);
Olof Johansson8d636d82008-03-05 16:34:16 -06001699
1700 }
1701
1702 /* Setup checksum channels if large MTU and none already allocated */
1703 if (new_mtu > 1500 && !mac->num_cs) {
1704 pasemi_mac_setup_csrings(mac);
1705 if (!mac->num_cs) {
1706 ret = -ENOMEM;
1707 goto out;
1708 }
Olof Johanssonef1ea0b2008-01-23 13:56:47 -06001709 }
1710
1711 /* Change maxf, i.e. what size frames are accepted.
1712 * Need room for ethernet header and CRC word
1713 */
1714 reg = read_mac_reg(mac, PAS_MAC_CFG_MACCFG);
1715 reg &= ~PAS_MAC_CFG_MACCFG_MAXF_M;
1716 reg |= PAS_MAC_CFG_MACCFG_MAXF(new_mtu + ETH_HLEN + 4);
1717 write_mac_reg(mac, PAS_MAC_CFG_MACCFG, reg);
1718
1719 dev->mtu = new_mtu;
1720 /* MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
1721 mac->bufsz = new_mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128;
1722
Olof Johansson8d636d82008-03-05 16:34:16 -06001723out:
Olof Johanssonef1ea0b2008-01-23 13:56:47 -06001724 if (running) {
1725 write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if),
1726 rcmdsta | PAS_DMA_RXINT_RCMDSTA_EN);
1727
1728 rx_ring(mac)->next_to_fill = 0;
1729 pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE-1);
1730
1731 napi_enable(&mac->napi);
1732 netif_start_queue(dev);
1733 pasemi_mac_intf_enable(mac);
1734 }
1735
Olof Johansson8d636d82008-03-05 16:34:16 -06001736 return ret;
Olof Johanssonef1ea0b2008-01-23 13:56:47 -06001737}
1738
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001739static int __devinit
1740pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1741{
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001742 struct net_device *dev;
1743 struct pasemi_mac *mac;
1744 int err;
Joe Perches0795af52007-10-03 17:59:30 -07001745 DECLARE_MAC_BUF(mac_buf);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001746
1747 err = pci_enable_device(pdev);
1748 if (err)
1749 return err;
1750
1751 dev = alloc_etherdev(sizeof(struct pasemi_mac));
1752 if (dev == NULL) {
1753 dev_err(&pdev->dev,
1754 "pasemi_mac: Could not allocate ethernet device.\n");
1755 err = -ENOMEM;
1756 goto out_disable_device;
1757 }
1758
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001759 pci_set_drvdata(pdev, dev);
1760 SET_NETDEV_DEV(dev, &pdev->dev);
1761
1762 mac = netdev_priv(dev);
1763
1764 mac->pdev = pdev;
1765 mac->netdev = dev;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001766
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001767 netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64);
1768
Olof Johansson5c153322007-11-28 20:56:41 -06001769 dev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX | NETIF_F_SG |
Olof Johansson25156782008-02-20 20:57:58 -06001770 NETIF_F_HIGHDMA | NETIF_F_GSO;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001771
Olof Johansson28ae79f2007-11-28 20:57:27 -06001772 mac->lro_mgr.max_aggr = LRO_MAX_AGGR;
1773 mac->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
1774 mac->lro_mgr.lro_arr = mac->lro_desc;
1775 mac->lro_mgr.get_skb_header = get_skb_hdr;
1776 mac->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1777 mac->lro_mgr.dev = mac->netdev;
1778 mac->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1779 mac->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1780
1781
Olof Johansson34c20622007-11-28 20:56:32 -06001782 mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
1783 if (!mac->dma_pdev) {
1784 dev_err(&mac->pdev->dev, "Can't find DMA Controller\n");
1785 err = -ENODEV;
1786 goto out;
1787 }
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001788
Olof Johansson34c20622007-11-28 20:56:32 -06001789 mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
1790 if (!mac->iob_pdev) {
1791 dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n");
1792 err = -ENODEV;
1793 goto out;
1794 }
1795
1796 /* get mac addr from device tree */
1797 if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) {
1798 err = -ENODEV;
1799 goto out;
1800 }
1801 memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr));
1802
1803 mac->dma_if = mac_to_intf(mac);
1804 if (mac->dma_if < 0) {
1805 dev_err(&mac->pdev->dev, "Can't map DMA interface\n");
1806 err = -ENODEV;
1807 goto out;
1808 }
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001809
1810 switch (pdev->device) {
1811 case 0xa005:
1812 mac->type = MAC_TYPE_GMAC;
1813 break;
1814 case 0xa006:
1815 mac->type = MAC_TYPE_XAUI;
1816 break;
1817 default:
1818 err = -ENODEV;
1819 goto out;
1820 }
1821
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001822 dev->open = pasemi_mac_open;
1823 dev->stop = pasemi_mac_close;
1824 dev->hard_start_xmit = pasemi_mac_start_tx;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001825 dev->set_multicast_list = pasemi_mac_set_rx_mode;
Olof Johansson5cea73b2008-01-23 13:56:19 -06001826 dev->set_mac_address = pasemi_mac_set_mac_addr;
Olof Johanssonef1ea0b2008-01-23 13:56:47 -06001827 dev->mtu = PE_DEF_MTU;
1828 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */
1829 mac->bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128;
Nate Case6e620402008-03-21 17:02:42 -05001830#ifdef CONFIG_NET_POLL_CONTROLLER
1831 dev->poll_controller = pasemi_mac_netpoll;
1832#endif
Olof Johanssonef1ea0b2008-01-23 13:56:47 -06001833
1834 dev->change_mtu = pasemi_mac_change_mtu;
Olof Johanssone37c7722008-02-20 20:57:59 -06001835 dev->ethtool_ops = &pasemi_mac_ethtool_ops;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001836
Olof Johanssonb6e05a12007-09-15 13:44:07 -07001837 if (err)
1838 goto out;
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001839
Olof Johanssonceb51362007-05-08 00:47:49 -05001840 mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
1841
Olof Johanssonbb6e9592007-05-08 00:47:54 -05001842 /* Enable most messages by default */
1843 mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1844
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001845 err = register_netdev(dev);
1846
1847 if (err) {
1848 dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n",
1849 err);
1850 goto out;
Olof Johansson69c29d82007-10-02 16:24:51 -05001851 } else if netif_msg_probe(mac)
Olof Johansson72b05b92007-11-28 20:54:28 -06001852 printk(KERN_INFO "%s: PA Semi %s: intf %d, hw addr %s\n",
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001853 dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI",
Olof Johansson72b05b92007-11-28 20:54:28 -06001854 mac->dma_if, print_mac(mac_buf, dev->dev_addr));
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001855
1856 return err;
1857
1858out:
Olof Johanssonb6e05a12007-09-15 13:44:07 -07001859 if (mac->iob_pdev)
1860 pci_dev_put(mac->iob_pdev);
1861 if (mac->dma_pdev)
1862 pci_dev_put(mac->dma_pdev);
Olof Johanssonb6e05a12007-09-15 13:44:07 -07001863
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001864 free_netdev(dev);
1865out_disable_device:
1866 pci_disable_device(pdev);
1867 return err;
1868
1869}
1870
1871static void __devexit pasemi_mac_remove(struct pci_dev *pdev)
1872{
1873 struct net_device *netdev = pci_get_drvdata(pdev);
1874 struct pasemi_mac *mac;
1875
1876 if (!netdev)
1877 return;
1878
1879 mac = netdev_priv(netdev);
1880
1881 unregister_netdev(netdev);
1882
1883 pci_disable_device(pdev);
1884 pci_dev_put(mac->dma_pdev);
1885 pci_dev_put(mac->iob_pdev);
1886
Olof Johansson34c20622007-11-28 20:56:32 -06001887 pasemi_dma_free_chan(&mac->tx->chan);
1888 pasemi_dma_free_chan(&mac->rx->chan);
Olof Johanssonb6e05a12007-09-15 13:44:07 -07001889
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001890 pci_set_drvdata(pdev, NULL);
1891 free_netdev(netdev);
1892}
1893
1894static struct pci_device_id pasemi_mac_pci_tbl[] = {
1895 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) },
1896 { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) },
olof@lixom.netfd178252007-05-12 14:57:36 -05001897 { },
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001898};
1899
1900MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl);
1901
1902static struct pci_driver pasemi_mac_driver = {
1903 .name = "pasemi_mac",
1904 .id_table = pasemi_mac_pci_tbl,
1905 .probe = pasemi_mac_probe,
1906 .remove = __devexit_p(pasemi_mac_remove),
1907};
1908
1909static void __exit pasemi_mac_cleanup_module(void)
1910{
1911 pci_unregister_driver(&pasemi_mac_driver);
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001912}
1913
1914int pasemi_mac_init_module(void)
1915{
Olof Johansson34c20622007-11-28 20:56:32 -06001916 int err;
1917
1918 err = pasemi_dma_init();
1919 if (err)
1920 return err;
1921
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001922 return pci_register_driver(&pasemi_mac_driver);
1923}
1924
Olof Johanssonf5cd7872007-01-31 21:43:54 -06001925module_init(pasemi_mac_init_module);
1926module_exit(pasemi_mac_cleanup_module);