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Merge tag 'v4.2-rc3' into next
[deliverable/linux.git] / drivers / net / ethernet / xscale / ixp4xx_eth.c
1 /*
2 * Intel IXP4xx Ethernet driver for Linux
3 *
4 * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of version 2 of the GNU General Public License
8 * as published by the Free Software Foundation.
9 *
10 * Ethernet port config (0x00 is not present on IXP42X):
11 *
12 * logical port 0x00 0x10 0x20
13 * NPE 0 (NPE-A) 1 (NPE-B) 2 (NPE-C)
14 * physical PortId 2 0 1
15 * TX queue 23 24 25
16 * RX-free queue 26 27 28
17 * TX-done queue is always 31, per-port RX and TX-ready queues are configurable
18 *
19 *
20 * Queue entries:
21 * bits 0 -> 1 - NPE ID (RX and TX-done)
22 * bits 0 -> 2 - priority (TX, per 802.1D)
23 * bits 3 -> 4 - port ID (user-set?)
24 * bits 5 -> 31 - physical descriptor address
25 */
26
27 #include <linux/delay.h>
28 #include <linux/dma-mapping.h>
29 #include <linux/dmapool.h>
30 #include <linux/etherdevice.h>
31 #include <linux/io.h>
32 #include <linux/kernel.h>
33 #include <linux/net_tstamp.h>
34 #include <linux/phy.h>
35 #include <linux/platform_device.h>
36 #include <linux/ptp_classify.h>
37 #include <linux/slab.h>
38 #include <linux/module.h>
39 #include <mach/ixp46x_ts.h>
40 #include <mach/npe.h>
41 #include <mach/qmgr.h>
42
43 #define DEBUG_DESC 0
44 #define DEBUG_RX 0
45 #define DEBUG_TX 0
46 #define DEBUG_PKT_BYTES 0
47 #define DEBUG_MDIO 0
48 #define DEBUG_CLOSE 0
49
50 #define DRV_NAME "ixp4xx_eth"
51
52 #define MAX_NPES 3
53
54 #define RX_DESCS 64 /* also length of all RX queues */
55 #define TX_DESCS 16 /* also length of all TX queues */
56 #define TXDONE_QUEUE_LEN 64 /* dwords */
57
58 #define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
59 #define REGS_SIZE 0x1000
60 #define MAX_MRU 1536 /* 0x600 */
61 #define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
62
63 #define NAPI_WEIGHT 16
64 #define MDIO_INTERVAL (3 * HZ)
65 #define MAX_MDIO_RETRIES 100 /* microseconds, typically 30 cycles */
66 #define MAX_CLOSE_WAIT 1000 /* microseconds, typically 2-3 cycles */
67
68 #define NPE_ID(port_id) ((port_id) >> 4)
69 #define PHYSICAL_ID(port_id) ((NPE_ID(port_id) + 2) % 3)
70 #define TX_QUEUE(port_id) (NPE_ID(port_id) + 23)
71 #define RXFREE_QUEUE(port_id) (NPE_ID(port_id) + 26)
72 #define TXDONE_QUEUE 31
73
74 #define PTP_SLAVE_MODE 1
75 #define PTP_MASTER_MODE 2
76 #define PORT2CHANNEL(p) NPE_ID(p->id)
77
78 /* TX Control Registers */
79 #define TX_CNTRL0_TX_EN 0x01
80 #define TX_CNTRL0_HALFDUPLEX 0x02
81 #define TX_CNTRL0_RETRY 0x04
82 #define TX_CNTRL0_PAD_EN 0x08
83 #define TX_CNTRL0_APPEND_FCS 0x10
84 #define TX_CNTRL0_2DEFER 0x20
85 #define TX_CNTRL0_RMII 0x40 /* reduced MII */
86 #define TX_CNTRL1_RETRIES 0x0F /* 4 bits */
87
88 /* RX Control Registers */
89 #define RX_CNTRL0_RX_EN 0x01
90 #define RX_CNTRL0_PADSTRIP_EN 0x02
91 #define RX_CNTRL0_SEND_FCS 0x04
92 #define RX_CNTRL0_PAUSE_EN 0x08
93 #define RX_CNTRL0_LOOP_EN 0x10
94 #define RX_CNTRL0_ADDR_FLTR_EN 0x20
95 #define RX_CNTRL0_RX_RUNT_EN 0x40
96 #define RX_CNTRL0_BCAST_DIS 0x80
97 #define RX_CNTRL1_DEFER_EN 0x01
98
99 /* Core Control Register */
100 #define CORE_RESET 0x01
101 #define CORE_RX_FIFO_FLUSH 0x02
102 #define CORE_TX_FIFO_FLUSH 0x04
103 #define CORE_SEND_JAM 0x08
104 #define CORE_MDC_EN 0x10 /* MDIO using NPE-B ETH-0 only */
105
106 #define DEFAULT_TX_CNTRL0 (TX_CNTRL0_TX_EN | TX_CNTRL0_RETRY | \
107 TX_CNTRL0_PAD_EN | TX_CNTRL0_APPEND_FCS | \
108 TX_CNTRL0_2DEFER)
109 #define DEFAULT_RX_CNTRL0 RX_CNTRL0_RX_EN
110 #define DEFAULT_CORE_CNTRL CORE_MDC_EN
111
112
113 /* NPE message codes */
114 #define NPE_GETSTATUS 0x00
115 #define NPE_EDB_SETPORTADDRESS 0x01
116 #define NPE_EDB_GETMACADDRESSDATABASE 0x02
117 #define NPE_EDB_SETMACADDRESSSDATABASE 0x03
118 #define NPE_GETSTATS 0x04
119 #define NPE_RESETSTATS 0x05
120 #define NPE_SETMAXFRAMELENGTHS 0x06
121 #define NPE_VLAN_SETRXTAGMODE 0x07
122 #define NPE_VLAN_SETDEFAULTRXVID 0x08
123 #define NPE_VLAN_SETPORTVLANTABLEENTRY 0x09
124 #define NPE_VLAN_SETPORTVLANTABLERANGE 0x0A
125 #define NPE_VLAN_SETRXQOSENTRY 0x0B
126 #define NPE_VLAN_SETPORTIDEXTRACTIONMODE 0x0C
127 #define NPE_STP_SETBLOCKINGSTATE 0x0D
128 #define NPE_FW_SETFIREWALLMODE 0x0E
129 #define NPE_PC_SETFRAMECONTROLDURATIONID 0x0F
130 #define NPE_PC_SETAPMACTABLE 0x11
131 #define NPE_SETLOOPBACK_MODE 0x12
132 #define NPE_PC_SETBSSIDTABLE 0x13
133 #define NPE_ADDRESS_FILTER_CONFIG 0x14
134 #define NPE_APPENDFCSCONFIG 0x15
135 #define NPE_NOTIFY_MAC_RECOVERY_DONE 0x16
136 #define NPE_MAC_RECOVERY_START 0x17
137
138
139 #ifdef __ARMEB__
140 typedef struct sk_buff buffer_t;
141 #define free_buffer dev_kfree_skb
142 #define free_buffer_irq dev_kfree_skb_irq
143 #else
144 typedef void buffer_t;
145 #define free_buffer kfree
146 #define free_buffer_irq kfree
147 #endif
148
149 struct eth_regs {
150 u32 tx_control[2], __res1[2]; /* 000 */
151 u32 rx_control[2], __res2[2]; /* 010 */
152 u32 random_seed, __res3[3]; /* 020 */
153 u32 partial_empty_threshold, __res4; /* 030 */
154 u32 partial_full_threshold, __res5; /* 038 */
155 u32 tx_start_bytes, __res6[3]; /* 040 */
156 u32 tx_deferral, rx_deferral, __res7[2];/* 050 */
157 u32 tx_2part_deferral[2], __res8[2]; /* 060 */
158 u32 slot_time, __res9[3]; /* 070 */
159 u32 mdio_command[4]; /* 080 */
160 u32 mdio_status[4]; /* 090 */
161 u32 mcast_mask[6], __res10[2]; /* 0A0 */
162 u32 mcast_addr[6], __res11[2]; /* 0C0 */
163 u32 int_clock_threshold, __res12[3]; /* 0E0 */
164 u32 hw_addr[6], __res13[61]; /* 0F0 */
165 u32 core_control; /* 1FC */
166 };
167
168 struct port {
169 struct resource *mem_res;
170 struct eth_regs __iomem *regs;
171 struct npe *npe;
172 struct net_device *netdev;
173 struct napi_struct napi;
174 struct phy_device *phydev;
175 struct eth_plat_info *plat;
176 buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
177 struct desc *desc_tab; /* coherent */
178 u32 desc_tab_phys;
179 int id; /* logical port ID */
180 int speed, duplex;
181 u8 firmware[4];
182 int hwts_tx_en;
183 int hwts_rx_en;
184 };
185
186 /* NPE message structure */
187 struct msg {
188 #ifdef __ARMEB__
189 u8 cmd, eth_id, byte2, byte3;
190 u8 byte4, byte5, byte6, byte7;
191 #else
192 u8 byte3, byte2, eth_id, cmd;
193 u8 byte7, byte6, byte5, byte4;
194 #endif
195 };
196
197 /* Ethernet packet descriptor */
198 struct desc {
199 u32 next; /* pointer to next buffer, unused */
200
201 #ifdef __ARMEB__
202 u16 buf_len; /* buffer length */
203 u16 pkt_len; /* packet length */
204 u32 data; /* pointer to data buffer in RAM */
205 u8 dest_id;
206 u8 src_id;
207 u16 flags;
208 u8 qos;
209 u8 padlen;
210 u16 vlan_tci;
211 #else
212 u16 pkt_len; /* packet length */
213 u16 buf_len; /* buffer length */
214 u32 data; /* pointer to data buffer in RAM */
215 u16 flags;
216 u8 src_id;
217 u8 dest_id;
218 u16 vlan_tci;
219 u8 padlen;
220 u8 qos;
221 #endif
222
223 #ifdef __ARMEB__
224 u8 dst_mac_0, dst_mac_1, dst_mac_2, dst_mac_3;
225 u8 dst_mac_4, dst_mac_5, src_mac_0, src_mac_1;
226 u8 src_mac_2, src_mac_3, src_mac_4, src_mac_5;
227 #else
228 u8 dst_mac_3, dst_mac_2, dst_mac_1, dst_mac_0;
229 u8 src_mac_1, src_mac_0, dst_mac_5, dst_mac_4;
230 u8 src_mac_5, src_mac_4, src_mac_3, src_mac_2;
231 #endif
232 };
233
234
235 #define rx_desc_phys(port, n) ((port)->desc_tab_phys + \
236 (n) * sizeof(struct desc))
237 #define rx_desc_ptr(port, n) (&(port)->desc_tab[n])
238
239 #define tx_desc_phys(port, n) ((port)->desc_tab_phys + \
240 ((n) + RX_DESCS) * sizeof(struct desc))
241 #define tx_desc_ptr(port, n) (&(port)->desc_tab[(n) + RX_DESCS])
242
243 #ifndef __ARMEB__
244 static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
245 {
246 int i;
247 for (i = 0; i < cnt; i++)
248 dest[i] = swab32(src[i]);
249 }
250 #endif
251
252 static spinlock_t mdio_lock;
253 static struct eth_regs __iomem *mdio_regs; /* mdio command and status only */
254 static struct mii_bus *mdio_bus;
255 static int ports_open;
256 static struct port *npe_port_tab[MAX_NPES];
257 static struct dma_pool *dma_pool;
258
259 static int ixp_ptp_match(struct sk_buff *skb, u16 uid_hi, u32 uid_lo, u16 seqid)
260 {
261 u8 *data = skb->data;
262 unsigned int offset;
263 u16 *hi, *id;
264 u32 lo;
265
266 if (ptp_classify_raw(skb) != PTP_CLASS_V1_IPV4)
267 return 0;
268
269 offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN;
270
271 if (skb->len < offset + OFF_PTP_SEQUENCE_ID + sizeof(seqid))
272 return 0;
273
274 hi = (u16 *)(data + offset + OFF_PTP_SOURCE_UUID);
275 id = (u16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
276
277 memcpy(&lo, &hi[1], sizeof(lo));
278
279 return (uid_hi == ntohs(*hi) &&
280 uid_lo == ntohl(lo) &&
281 seqid == ntohs(*id));
282 }
283
284 static void ixp_rx_timestamp(struct port *port, struct sk_buff *skb)
285 {
286 struct skb_shared_hwtstamps *shhwtstamps;
287 struct ixp46x_ts_regs *regs;
288 u64 ns;
289 u32 ch, hi, lo, val;
290 u16 uid, seq;
291
292 if (!port->hwts_rx_en)
293 return;
294
295 ch = PORT2CHANNEL(port);
296
297 regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
298
299 val = __raw_readl(&regs->channel[ch].ch_event);
300
301 if (!(val & RX_SNAPSHOT_LOCKED))
302 return;
303
304 lo = __raw_readl(&regs->channel[ch].src_uuid_lo);
305 hi = __raw_readl(&regs->channel[ch].src_uuid_hi);
306
307 uid = hi & 0xffff;
308 seq = (hi >> 16) & 0xffff;
309
310 if (!ixp_ptp_match(skb, htons(uid), htonl(lo), htons(seq)))
311 goto out;
312
313 lo = __raw_readl(&regs->channel[ch].rx_snap_lo);
314 hi = __raw_readl(&regs->channel[ch].rx_snap_hi);
315 ns = ((u64) hi) << 32;
316 ns |= lo;
317 ns <<= TICKS_NS_SHIFT;
318
319 shhwtstamps = skb_hwtstamps(skb);
320 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
321 shhwtstamps->hwtstamp = ns_to_ktime(ns);
322 out:
323 __raw_writel(RX_SNAPSHOT_LOCKED, &regs->channel[ch].ch_event);
324 }
325
326 static void ixp_tx_timestamp(struct port *port, struct sk_buff *skb)
327 {
328 struct skb_shared_hwtstamps shhwtstamps;
329 struct ixp46x_ts_regs *regs;
330 struct skb_shared_info *shtx;
331 u64 ns;
332 u32 ch, cnt, hi, lo, val;
333
334 shtx = skb_shinfo(skb);
335 if (unlikely(shtx->tx_flags & SKBTX_HW_TSTAMP && port->hwts_tx_en))
336 shtx->tx_flags |= SKBTX_IN_PROGRESS;
337 else
338 return;
339
340 ch = PORT2CHANNEL(port);
341
342 regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
343
344 /*
345 * This really stinks, but we have to poll for the Tx time stamp.
346 * Usually, the time stamp is ready after 4 to 6 microseconds.
347 */
348 for (cnt = 0; cnt < 100; cnt++) {
349 val = __raw_readl(&regs->channel[ch].ch_event);
350 if (val & TX_SNAPSHOT_LOCKED)
351 break;
352 udelay(1);
353 }
354 if (!(val & TX_SNAPSHOT_LOCKED)) {
355 shtx->tx_flags &= ~SKBTX_IN_PROGRESS;
356 return;
357 }
358
359 lo = __raw_readl(&regs->channel[ch].tx_snap_lo);
360 hi = __raw_readl(&regs->channel[ch].tx_snap_hi);
361 ns = ((u64) hi) << 32;
362 ns |= lo;
363 ns <<= TICKS_NS_SHIFT;
364
365 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
366 shhwtstamps.hwtstamp = ns_to_ktime(ns);
367 skb_tstamp_tx(skb, &shhwtstamps);
368
369 __raw_writel(TX_SNAPSHOT_LOCKED, &regs->channel[ch].ch_event);
370 }
371
372 static int hwtstamp_set(struct net_device *netdev, struct ifreq *ifr)
373 {
374 struct hwtstamp_config cfg;
375 struct ixp46x_ts_regs *regs;
376 struct port *port = netdev_priv(netdev);
377 int ch;
378
379 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
380 return -EFAULT;
381
382 if (cfg.flags) /* reserved for future extensions */
383 return -EINVAL;
384
385 ch = PORT2CHANNEL(port);
386 regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
387
388 if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
389 return -ERANGE;
390
391 switch (cfg.rx_filter) {
392 case HWTSTAMP_FILTER_NONE:
393 port->hwts_rx_en = 0;
394 break;
395 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
396 port->hwts_rx_en = PTP_SLAVE_MODE;
397 __raw_writel(0, &regs->channel[ch].ch_control);
398 break;
399 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
400 port->hwts_rx_en = PTP_MASTER_MODE;
401 __raw_writel(MASTER_MODE, &regs->channel[ch].ch_control);
402 break;
403 default:
404 return -ERANGE;
405 }
406
407 port->hwts_tx_en = cfg.tx_type == HWTSTAMP_TX_ON;
408
409 /* Clear out any old time stamps. */
410 __raw_writel(TX_SNAPSHOT_LOCKED | RX_SNAPSHOT_LOCKED,
411 &regs->channel[ch].ch_event);
412
413 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
414 }
415
416 static int hwtstamp_get(struct net_device *netdev, struct ifreq *ifr)
417 {
418 struct hwtstamp_config cfg;
419 struct port *port = netdev_priv(netdev);
420
421 cfg.flags = 0;
422 cfg.tx_type = port->hwts_tx_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
423
424 switch (port->hwts_rx_en) {
425 case 0:
426 cfg.rx_filter = HWTSTAMP_FILTER_NONE;
427 break;
428 case PTP_SLAVE_MODE:
429 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC;
430 break;
431 case PTP_MASTER_MODE:
432 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ;
433 break;
434 default:
435 WARN_ON_ONCE(1);
436 return -ERANGE;
437 }
438
439 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
440 }
441
442 static int ixp4xx_mdio_cmd(struct mii_bus *bus, int phy_id, int location,
443 int write, u16 cmd)
444 {
445 int cycles = 0;
446
447 if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) {
448 printk(KERN_ERR "%s: MII not ready to transmit\n", bus->name);
449 return -1;
450 }
451
452 if (write) {
453 __raw_writel(cmd & 0xFF, &mdio_regs->mdio_command[0]);
454 __raw_writel(cmd >> 8, &mdio_regs->mdio_command[1]);
455 }
456 __raw_writel(((phy_id << 5) | location) & 0xFF,
457 &mdio_regs->mdio_command[2]);
458 __raw_writel((phy_id >> 3) | (write << 2) | 0x80 /* GO */,
459 &mdio_regs->mdio_command[3]);
460
461 while ((cycles < MAX_MDIO_RETRIES) &&
462 (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80)) {
463 udelay(1);
464 cycles++;
465 }
466
467 if (cycles == MAX_MDIO_RETRIES) {
468 printk(KERN_ERR "%s #%i: MII write failed\n", bus->name,
469 phy_id);
470 return -1;
471 }
472
473 #if DEBUG_MDIO
474 printk(KERN_DEBUG "%s #%i: mdio_%s() took %i cycles\n", bus->name,
475 phy_id, write ? "write" : "read", cycles);
476 #endif
477
478 if (write)
479 return 0;
480
481 if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) {
482 #if DEBUG_MDIO
483 printk(KERN_DEBUG "%s #%i: MII read failed\n", bus->name,
484 phy_id);
485 #endif
486 return 0xFFFF; /* don't return error */
487 }
488
489 return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) |
490 ((__raw_readl(&mdio_regs->mdio_status[1]) & 0xFF) << 8);
491 }
492
493 static int ixp4xx_mdio_read(struct mii_bus *bus, int phy_id, int location)
494 {
495 unsigned long flags;
496 int ret;
497
498 spin_lock_irqsave(&mdio_lock, flags);
499 ret = ixp4xx_mdio_cmd(bus, phy_id, location, 0, 0);
500 spin_unlock_irqrestore(&mdio_lock, flags);
501 #if DEBUG_MDIO
502 printk(KERN_DEBUG "%s #%i: MII read [%i] -> 0x%X\n", bus->name,
503 phy_id, location, ret);
504 #endif
505 return ret;
506 }
507
508 static int ixp4xx_mdio_write(struct mii_bus *bus, int phy_id, int location,
509 u16 val)
510 {
511 unsigned long flags;
512 int ret;
513
514 spin_lock_irqsave(&mdio_lock, flags);
515 ret = ixp4xx_mdio_cmd(bus, phy_id, location, 1, val);
516 spin_unlock_irqrestore(&mdio_lock, flags);
517 #if DEBUG_MDIO
518 printk(KERN_DEBUG "%s #%i: MII write [%i] <- 0x%X, err = %i\n",
519 bus->name, phy_id, location, val, ret);
520 #endif
521 return ret;
522 }
523
524 static int ixp4xx_mdio_register(void)
525 {
526 int err;
527
528 if (!(mdio_bus = mdiobus_alloc()))
529 return -ENOMEM;
530
531 if (cpu_is_ixp43x()) {
532 /* IXP43x lacks NPE-B and uses NPE-C for MII PHY access */
533 if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEC_ETH))
534 return -ENODEV;
535 mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
536 } else {
537 /* All MII PHY accesses use NPE-B Ethernet registers */
538 if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0))
539 return -ENODEV;
540 mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
541 }
542
543 __raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
544 spin_lock_init(&mdio_lock);
545 mdio_bus->name = "IXP4xx MII Bus";
546 mdio_bus->read = &ixp4xx_mdio_read;
547 mdio_bus->write = &ixp4xx_mdio_write;
548 snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "ixp4xx-eth-0");
549
550 if ((err = mdiobus_register(mdio_bus)))
551 mdiobus_free(mdio_bus);
552 return err;
553 }
554
555 static void ixp4xx_mdio_remove(void)
556 {
557 mdiobus_unregister(mdio_bus);
558 mdiobus_free(mdio_bus);
559 }
560
561
562 static void ixp4xx_adjust_link(struct net_device *dev)
563 {
564 struct port *port = netdev_priv(dev);
565 struct phy_device *phydev = port->phydev;
566
567 if (!phydev->link) {
568 if (port->speed) {
569 port->speed = 0;
570 printk(KERN_INFO "%s: link down\n", dev->name);
571 }
572 return;
573 }
574
575 if (port->speed == phydev->speed && port->duplex == phydev->duplex)
576 return;
577
578 port->speed = phydev->speed;
579 port->duplex = phydev->duplex;
580
581 if (port->duplex)
582 __raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX,
583 &port->regs->tx_control[0]);
584 else
585 __raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
586 &port->regs->tx_control[0]);
587
588 printk(KERN_INFO "%s: link up, speed %u Mb/s, %s duplex\n",
589 dev->name, port->speed, port->duplex ? "full" : "half");
590 }
591
592
593 static inline void debug_pkt(struct net_device *dev, const char *func,
594 u8 *data, int len)
595 {
596 #if DEBUG_PKT_BYTES
597 int i;
598
599 printk(KERN_DEBUG "%s: %s(%i) ", dev->name, func, len);
600 for (i = 0; i < len; i++) {
601 if (i >= DEBUG_PKT_BYTES)
602 break;
603 printk("%s%02X",
604 ((i == 6) || (i == 12) || (i >= 14)) ? " " : "",
605 data[i]);
606 }
607 printk("\n");
608 #endif
609 }
610
611
612 static inline void debug_desc(u32 phys, struct desc *desc)
613 {
614 #if DEBUG_DESC
615 printk(KERN_DEBUG "%X: %X %3X %3X %08X %2X < %2X %4X %X"
616 " %X %X %02X%02X%02X%02X%02X%02X < %02X%02X%02X%02X%02X%02X\n",
617 phys, desc->next, desc->buf_len, desc->pkt_len,
618 desc->data, desc->dest_id, desc->src_id, desc->flags,
619 desc->qos, desc->padlen, desc->vlan_tci,
620 desc->dst_mac_0, desc->dst_mac_1, desc->dst_mac_2,
621 desc->dst_mac_3, desc->dst_mac_4, desc->dst_mac_5,
622 desc->src_mac_0, desc->src_mac_1, desc->src_mac_2,
623 desc->src_mac_3, desc->src_mac_4, desc->src_mac_5);
624 #endif
625 }
626
627 static inline int queue_get_desc(unsigned int queue, struct port *port,
628 int is_tx)
629 {
630 u32 phys, tab_phys, n_desc;
631 struct desc *tab;
632
633 if (!(phys = qmgr_get_entry(queue)))
634 return -1;
635
636 phys &= ~0x1F; /* mask out non-address bits */
637 tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0);
638 tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0);
639 n_desc = (phys - tab_phys) / sizeof(struct desc);
640 BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS));
641 debug_desc(phys, &tab[n_desc]);
642 BUG_ON(tab[n_desc].next);
643 return n_desc;
644 }
645
646 static inline void queue_put_desc(unsigned int queue, u32 phys,
647 struct desc *desc)
648 {
649 debug_desc(phys, desc);
650 BUG_ON(phys & 0x1F);
651 qmgr_put_entry(queue, phys);
652 /* Don't check for queue overflow here, we've allocated sufficient
653 length and queues >= 32 don't support this check anyway. */
654 }
655
656
657 static inline void dma_unmap_tx(struct port *port, struct desc *desc)
658 {
659 #ifdef __ARMEB__
660 dma_unmap_single(&port->netdev->dev, desc->data,
661 desc->buf_len, DMA_TO_DEVICE);
662 #else
663 dma_unmap_single(&port->netdev->dev, desc->data & ~3,
664 ALIGN((desc->data & 3) + desc->buf_len, 4),
665 DMA_TO_DEVICE);
666 #endif
667 }
668
669
670 static void eth_rx_irq(void *pdev)
671 {
672 struct net_device *dev = pdev;
673 struct port *port = netdev_priv(dev);
674
675 #if DEBUG_RX
676 printk(KERN_DEBUG "%s: eth_rx_irq\n", dev->name);
677 #endif
678 qmgr_disable_irq(port->plat->rxq);
679 napi_schedule(&port->napi);
680 }
681
682 static int eth_poll(struct napi_struct *napi, int budget)
683 {
684 struct port *port = container_of(napi, struct port, napi);
685 struct net_device *dev = port->netdev;
686 unsigned int rxq = port->plat->rxq, rxfreeq = RXFREE_QUEUE(port->id);
687 int received = 0;
688
689 #if DEBUG_RX
690 printk(KERN_DEBUG "%s: eth_poll\n", dev->name);
691 #endif
692
693 while (received < budget) {
694 struct sk_buff *skb;
695 struct desc *desc;
696 int n;
697 #ifdef __ARMEB__
698 struct sk_buff *temp;
699 u32 phys;
700 #endif
701
702 if ((n = queue_get_desc(rxq, port, 0)) < 0) {
703 #if DEBUG_RX
704 printk(KERN_DEBUG "%s: eth_poll napi_complete\n",
705 dev->name);
706 #endif
707 napi_complete(napi);
708 qmgr_enable_irq(rxq);
709 if (!qmgr_stat_below_low_watermark(rxq) &&
710 napi_reschedule(napi)) { /* not empty again */
711 #if DEBUG_RX
712 printk(KERN_DEBUG "%s: eth_poll"
713 " napi_reschedule successed\n",
714 dev->name);
715 #endif
716 qmgr_disable_irq(rxq);
717 continue;
718 }
719 #if DEBUG_RX
720 printk(KERN_DEBUG "%s: eth_poll all done\n",
721 dev->name);
722 #endif
723 return received; /* all work done */
724 }
725
726 desc = rx_desc_ptr(port, n);
727
728 #ifdef __ARMEB__
729 if ((skb = netdev_alloc_skb(dev, RX_BUFF_SIZE))) {
730 phys = dma_map_single(&dev->dev, skb->data,
731 RX_BUFF_SIZE, DMA_FROM_DEVICE);
732 if (dma_mapping_error(&dev->dev, phys)) {
733 dev_kfree_skb(skb);
734 skb = NULL;
735 }
736 }
737 #else
738 skb = netdev_alloc_skb(dev,
739 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4));
740 #endif
741
742 if (!skb) {
743 dev->stats.rx_dropped++;
744 /* put the desc back on RX-ready queue */
745 desc->buf_len = MAX_MRU;
746 desc->pkt_len = 0;
747 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
748 continue;
749 }
750
751 /* process received frame */
752 #ifdef __ARMEB__
753 temp = skb;
754 skb = port->rx_buff_tab[n];
755 dma_unmap_single(&dev->dev, desc->data - NET_IP_ALIGN,
756 RX_BUFF_SIZE, DMA_FROM_DEVICE);
757 #else
758 dma_sync_single_for_cpu(&dev->dev, desc->data - NET_IP_ALIGN,
759 RX_BUFF_SIZE, DMA_FROM_DEVICE);
760 memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
761 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4) / 4);
762 #endif
763 skb_reserve(skb, NET_IP_ALIGN);
764 skb_put(skb, desc->pkt_len);
765
766 debug_pkt(dev, "eth_poll", skb->data, skb->len);
767
768 ixp_rx_timestamp(port, skb);
769 skb->protocol = eth_type_trans(skb, dev);
770 dev->stats.rx_packets++;
771 dev->stats.rx_bytes += skb->len;
772 netif_receive_skb(skb);
773
774 /* put the new buffer on RX-free queue */
775 #ifdef __ARMEB__
776 port->rx_buff_tab[n] = temp;
777 desc->data = phys + NET_IP_ALIGN;
778 #endif
779 desc->buf_len = MAX_MRU;
780 desc->pkt_len = 0;
781 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
782 received++;
783 }
784
785 #if DEBUG_RX
786 printk(KERN_DEBUG "eth_poll(): end, not all work done\n");
787 #endif
788 return received; /* not all work done */
789 }
790
791
792 static void eth_txdone_irq(void *unused)
793 {
794 u32 phys;
795
796 #if DEBUG_TX
797 printk(KERN_DEBUG DRV_NAME ": eth_txdone_irq\n");
798 #endif
799 while ((phys = qmgr_get_entry(TXDONE_QUEUE)) != 0) {
800 u32 npe_id, n_desc;
801 struct port *port;
802 struct desc *desc;
803 int start;
804
805 npe_id = phys & 3;
806 BUG_ON(npe_id >= MAX_NPES);
807 port = npe_port_tab[npe_id];
808 BUG_ON(!port);
809 phys &= ~0x1F; /* mask out non-address bits */
810 n_desc = (phys - tx_desc_phys(port, 0)) / sizeof(struct desc);
811 BUG_ON(n_desc >= TX_DESCS);
812 desc = tx_desc_ptr(port, n_desc);
813 debug_desc(phys, desc);
814
815 if (port->tx_buff_tab[n_desc]) { /* not the draining packet */
816 port->netdev->stats.tx_packets++;
817 port->netdev->stats.tx_bytes += desc->pkt_len;
818
819 dma_unmap_tx(port, desc);
820 #if DEBUG_TX
821 printk(KERN_DEBUG "%s: eth_txdone_irq free %p\n",
822 port->netdev->name, port->tx_buff_tab[n_desc]);
823 #endif
824 free_buffer_irq(port->tx_buff_tab[n_desc]);
825 port->tx_buff_tab[n_desc] = NULL;
826 }
827
828 start = qmgr_stat_below_low_watermark(port->plat->txreadyq);
829 queue_put_desc(port->plat->txreadyq, phys, desc);
830 if (start) { /* TX-ready queue was empty */
831 #if DEBUG_TX
832 printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n",
833 port->netdev->name);
834 #endif
835 netif_wake_queue(port->netdev);
836 }
837 }
838 }
839
840 static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
841 {
842 struct port *port = netdev_priv(dev);
843 unsigned int txreadyq = port->plat->txreadyq;
844 int len, offset, bytes, n;
845 void *mem;
846 u32 phys;
847 struct desc *desc;
848
849 #if DEBUG_TX
850 printk(KERN_DEBUG "%s: eth_xmit\n", dev->name);
851 #endif
852
853 if (unlikely(skb->len > MAX_MRU)) {
854 dev_kfree_skb(skb);
855 dev->stats.tx_errors++;
856 return NETDEV_TX_OK;
857 }
858
859 debug_pkt(dev, "eth_xmit", skb->data, skb->len);
860
861 len = skb->len;
862 #ifdef __ARMEB__
863 offset = 0; /* no need to keep alignment */
864 bytes = len;
865 mem = skb->data;
866 #else
867 offset = (int)skb->data & 3; /* keep 32-bit alignment */
868 bytes = ALIGN(offset + len, 4);
869 if (!(mem = kmalloc(bytes, GFP_ATOMIC))) {
870 dev_kfree_skb(skb);
871 dev->stats.tx_dropped++;
872 return NETDEV_TX_OK;
873 }
874 memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4);
875 #endif
876
877 phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
878 if (dma_mapping_error(&dev->dev, phys)) {
879 dev_kfree_skb(skb);
880 #ifndef __ARMEB__
881 kfree(mem);
882 #endif
883 dev->stats.tx_dropped++;
884 return NETDEV_TX_OK;
885 }
886
887 n = queue_get_desc(txreadyq, port, 1);
888 BUG_ON(n < 0);
889 desc = tx_desc_ptr(port, n);
890
891 #ifdef __ARMEB__
892 port->tx_buff_tab[n] = skb;
893 #else
894 port->tx_buff_tab[n] = mem;
895 #endif
896 desc->data = phys + offset;
897 desc->buf_len = desc->pkt_len = len;
898
899 /* NPE firmware pads short frames with zeros internally */
900 wmb();
901 queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc);
902
903 if (qmgr_stat_below_low_watermark(txreadyq)) { /* empty */
904 #if DEBUG_TX
905 printk(KERN_DEBUG "%s: eth_xmit queue full\n", dev->name);
906 #endif
907 netif_stop_queue(dev);
908 /* we could miss TX ready interrupt */
909 /* really empty in fact */
910 if (!qmgr_stat_below_low_watermark(txreadyq)) {
911 #if DEBUG_TX
912 printk(KERN_DEBUG "%s: eth_xmit ready again\n",
913 dev->name);
914 #endif
915 netif_wake_queue(dev);
916 }
917 }
918
919 #if DEBUG_TX
920 printk(KERN_DEBUG "%s: eth_xmit end\n", dev->name);
921 #endif
922
923 ixp_tx_timestamp(port, skb);
924 skb_tx_timestamp(skb);
925
926 #ifndef __ARMEB__
927 dev_kfree_skb(skb);
928 #endif
929 return NETDEV_TX_OK;
930 }
931
932
933 static void eth_set_mcast_list(struct net_device *dev)
934 {
935 struct port *port = netdev_priv(dev);
936 struct netdev_hw_addr *ha;
937 u8 diffs[ETH_ALEN], *addr;
938 int i;
939 static const u8 allmulti[] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
940
941 if ((dev->flags & IFF_ALLMULTI) && !(dev->flags & IFF_PROMISC)) {
942 for (i = 0; i < ETH_ALEN; i++) {
943 __raw_writel(allmulti[i], &port->regs->mcast_addr[i]);
944 __raw_writel(allmulti[i], &port->regs->mcast_mask[i]);
945 }
946 __raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
947 &port->regs->rx_control[0]);
948 return;
949 }
950
951 if ((dev->flags & IFF_PROMISC) || netdev_mc_empty(dev)) {
952 __raw_writel(DEFAULT_RX_CNTRL0 & ~RX_CNTRL0_ADDR_FLTR_EN,
953 &port->regs->rx_control[0]);
954 return;
955 }
956
957 eth_zero_addr(diffs);
958
959 addr = NULL;
960 netdev_for_each_mc_addr(ha, dev) {
961 if (!addr)
962 addr = ha->addr; /* first MAC address */
963 for (i = 0; i < ETH_ALEN; i++)
964 diffs[i] |= addr[i] ^ ha->addr[i];
965 }
966
967 for (i = 0; i < ETH_ALEN; i++) {
968 __raw_writel(addr[i], &port->regs->mcast_addr[i]);
969 __raw_writel(~diffs[i], &port->regs->mcast_mask[i]);
970 }
971
972 __raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
973 &port->regs->rx_control[0]);
974 }
975
976
977 static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
978 {
979 struct port *port = netdev_priv(dev);
980
981 if (!netif_running(dev))
982 return -EINVAL;
983
984 if (cpu_is_ixp46x()) {
985 if (cmd == SIOCSHWTSTAMP)
986 return hwtstamp_set(dev, req);
987 if (cmd == SIOCGHWTSTAMP)
988 return hwtstamp_get(dev, req);
989 }
990
991 return phy_mii_ioctl(port->phydev, req, cmd);
992 }
993
994 /* ethtool support */
995
996 static void ixp4xx_get_drvinfo(struct net_device *dev,
997 struct ethtool_drvinfo *info)
998 {
999 struct port *port = netdev_priv(dev);
1000
1001 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
1002 snprintf(info->fw_version, sizeof(info->fw_version), "%u:%u:%u:%u",
1003 port->firmware[0], port->firmware[1],
1004 port->firmware[2], port->firmware[3]);
1005 strlcpy(info->bus_info, "internal", sizeof(info->bus_info));
1006 }
1007
1008 static int ixp4xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1009 {
1010 struct port *port = netdev_priv(dev);
1011 return phy_ethtool_gset(port->phydev, cmd);
1012 }
1013
1014 static int ixp4xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1015 {
1016 struct port *port = netdev_priv(dev);
1017 return phy_ethtool_sset(port->phydev, cmd);
1018 }
1019
1020 static int ixp4xx_nway_reset(struct net_device *dev)
1021 {
1022 struct port *port = netdev_priv(dev);
1023 return phy_start_aneg(port->phydev);
1024 }
1025
1026 int ixp46x_phc_index = -1;
1027 EXPORT_SYMBOL_GPL(ixp46x_phc_index);
1028
1029 static int ixp4xx_get_ts_info(struct net_device *dev,
1030 struct ethtool_ts_info *info)
1031 {
1032 if (!cpu_is_ixp46x()) {
1033 info->so_timestamping =
1034 SOF_TIMESTAMPING_TX_SOFTWARE |
1035 SOF_TIMESTAMPING_RX_SOFTWARE |
1036 SOF_TIMESTAMPING_SOFTWARE;
1037 info->phc_index = -1;
1038 return 0;
1039 }
1040 info->so_timestamping =
1041 SOF_TIMESTAMPING_TX_HARDWARE |
1042 SOF_TIMESTAMPING_RX_HARDWARE |
1043 SOF_TIMESTAMPING_RAW_HARDWARE;
1044 info->phc_index = ixp46x_phc_index;
1045 info->tx_types =
1046 (1 << HWTSTAMP_TX_OFF) |
1047 (1 << HWTSTAMP_TX_ON);
1048 info->rx_filters =
1049 (1 << HWTSTAMP_FILTER_NONE) |
1050 (1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC) |
1051 (1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ);
1052 return 0;
1053 }
1054
1055 static const struct ethtool_ops ixp4xx_ethtool_ops = {
1056 .get_drvinfo = ixp4xx_get_drvinfo,
1057 .get_settings = ixp4xx_get_settings,
1058 .set_settings = ixp4xx_set_settings,
1059 .nway_reset = ixp4xx_nway_reset,
1060 .get_link = ethtool_op_get_link,
1061 .get_ts_info = ixp4xx_get_ts_info,
1062 };
1063
1064
1065 static int request_queues(struct port *port)
1066 {
1067 int err;
1068
1069 err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0,
1070 "%s:RX-free", port->netdev->name);
1071 if (err)
1072 return err;
1073
1074 err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0,
1075 "%s:RX", port->netdev->name);
1076 if (err)
1077 goto rel_rxfree;
1078
1079 err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0,
1080 "%s:TX", port->netdev->name);
1081 if (err)
1082 goto rel_rx;
1083
1084 err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0,
1085 "%s:TX-ready", port->netdev->name);
1086 if (err)
1087 goto rel_tx;
1088
1089 /* TX-done queue handles skbs sent out by the NPEs */
1090 if (!ports_open) {
1091 err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0,
1092 "%s:TX-done", DRV_NAME);
1093 if (err)
1094 goto rel_txready;
1095 }
1096 return 0;
1097
1098 rel_txready:
1099 qmgr_release_queue(port->plat->txreadyq);
1100 rel_tx:
1101 qmgr_release_queue(TX_QUEUE(port->id));
1102 rel_rx:
1103 qmgr_release_queue(port->plat->rxq);
1104 rel_rxfree:
1105 qmgr_release_queue(RXFREE_QUEUE(port->id));
1106 printk(KERN_DEBUG "%s: unable to request hardware queues\n",
1107 port->netdev->name);
1108 return err;
1109 }
1110
1111 static void release_queues(struct port *port)
1112 {
1113 qmgr_release_queue(RXFREE_QUEUE(port->id));
1114 qmgr_release_queue(port->plat->rxq);
1115 qmgr_release_queue(TX_QUEUE(port->id));
1116 qmgr_release_queue(port->plat->txreadyq);
1117
1118 if (!ports_open)
1119 qmgr_release_queue(TXDONE_QUEUE);
1120 }
1121
1122 static int init_queues(struct port *port)
1123 {
1124 int i;
1125
1126 if (!ports_open) {
1127 dma_pool = dma_pool_create(DRV_NAME, &port->netdev->dev,
1128 POOL_ALLOC_SIZE, 32, 0);
1129 if (!dma_pool)
1130 return -ENOMEM;
1131 }
1132
1133 if (!(port->desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL,
1134 &port->desc_tab_phys)))
1135 return -ENOMEM;
1136 memset(port->desc_tab, 0, POOL_ALLOC_SIZE);
1137 memset(port->rx_buff_tab, 0, sizeof(port->rx_buff_tab)); /* tables */
1138 memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab));
1139
1140 /* Setup RX buffers */
1141 for (i = 0; i < RX_DESCS; i++) {
1142 struct desc *desc = rx_desc_ptr(port, i);
1143 buffer_t *buff; /* skb or kmalloc()ated memory */
1144 void *data;
1145 #ifdef __ARMEB__
1146 if (!(buff = netdev_alloc_skb(port->netdev, RX_BUFF_SIZE)))
1147 return -ENOMEM;
1148 data = buff->data;
1149 #else
1150 if (!(buff = kmalloc(RX_BUFF_SIZE, GFP_KERNEL)))
1151 return -ENOMEM;
1152 data = buff;
1153 #endif
1154 desc->buf_len = MAX_MRU;
1155 desc->data = dma_map_single(&port->netdev->dev, data,
1156 RX_BUFF_SIZE, DMA_FROM_DEVICE);
1157 if (dma_mapping_error(&port->netdev->dev, desc->data)) {
1158 free_buffer(buff);
1159 return -EIO;
1160 }
1161 desc->data += NET_IP_ALIGN;
1162 port->rx_buff_tab[i] = buff;
1163 }
1164
1165 return 0;
1166 }
1167
1168 static void destroy_queues(struct port *port)
1169 {
1170 int i;
1171
1172 if (port->desc_tab) {
1173 for (i = 0; i < RX_DESCS; i++) {
1174 struct desc *desc = rx_desc_ptr(port, i);
1175 buffer_t *buff = port->rx_buff_tab[i];
1176 if (buff) {
1177 dma_unmap_single(&port->netdev->dev,
1178 desc->data - NET_IP_ALIGN,
1179 RX_BUFF_SIZE, DMA_FROM_DEVICE);
1180 free_buffer(buff);
1181 }
1182 }
1183 for (i = 0; i < TX_DESCS; i++) {
1184 struct desc *desc = tx_desc_ptr(port, i);
1185 buffer_t *buff = port->tx_buff_tab[i];
1186 if (buff) {
1187 dma_unmap_tx(port, desc);
1188 free_buffer(buff);
1189 }
1190 }
1191 dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys);
1192 port->desc_tab = NULL;
1193 }
1194
1195 if (!ports_open && dma_pool) {
1196 dma_pool_destroy(dma_pool);
1197 dma_pool = NULL;
1198 }
1199 }
1200
1201 static int eth_open(struct net_device *dev)
1202 {
1203 struct port *port = netdev_priv(dev);
1204 struct npe *npe = port->npe;
1205 struct msg msg;
1206 int i, err;
1207
1208 if (!npe_running(npe)) {
1209 err = npe_load_firmware(npe, npe_name(npe), &dev->dev);
1210 if (err)
1211 return err;
1212
1213 if (npe_recv_message(npe, &msg, "ETH_GET_STATUS")) {
1214 printk(KERN_ERR "%s: %s not responding\n", dev->name,
1215 npe_name(npe));
1216 return -EIO;
1217 }
1218 port->firmware[0] = msg.byte4;
1219 port->firmware[1] = msg.byte5;
1220 port->firmware[2] = msg.byte6;
1221 port->firmware[3] = msg.byte7;
1222 }
1223
1224 memset(&msg, 0, sizeof(msg));
1225 msg.cmd = NPE_VLAN_SETRXQOSENTRY;
1226 msg.eth_id = port->id;
1227 msg.byte5 = port->plat->rxq | 0x80;
1228 msg.byte7 = port->plat->rxq << 4;
1229 for (i = 0; i < 8; i++) {
1230 msg.byte3 = i;
1231 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_RXQ"))
1232 return -EIO;
1233 }
1234
1235 msg.cmd = NPE_EDB_SETPORTADDRESS;
1236 msg.eth_id = PHYSICAL_ID(port->id);
1237 msg.byte2 = dev->dev_addr[0];
1238 msg.byte3 = dev->dev_addr[1];
1239 msg.byte4 = dev->dev_addr[2];
1240 msg.byte5 = dev->dev_addr[3];
1241 msg.byte6 = dev->dev_addr[4];
1242 msg.byte7 = dev->dev_addr[5];
1243 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAC"))
1244 return -EIO;
1245
1246 memset(&msg, 0, sizeof(msg));
1247 msg.cmd = NPE_FW_SETFIREWALLMODE;
1248 msg.eth_id = port->id;
1249 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
1250 return -EIO;
1251
1252 if ((err = request_queues(port)) != 0)
1253 return err;
1254
1255 if ((err = init_queues(port)) != 0) {
1256 destroy_queues(port);
1257 release_queues(port);
1258 return err;
1259 }
1260
1261 port->speed = 0; /* force "link up" message */
1262 phy_start(port->phydev);
1263
1264 for (i = 0; i < ETH_ALEN; i++)
1265 __raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]);
1266 __raw_writel(0x08, &port->regs->random_seed);
1267 __raw_writel(0x12, &port->regs->partial_empty_threshold);
1268 __raw_writel(0x30, &port->regs->partial_full_threshold);
1269 __raw_writel(0x08, &port->regs->tx_start_bytes);
1270 __raw_writel(0x15, &port->regs->tx_deferral);
1271 __raw_writel(0x08, &port->regs->tx_2part_deferral[0]);
1272 __raw_writel(0x07, &port->regs->tx_2part_deferral[1]);
1273 __raw_writel(0x80, &port->regs->slot_time);
1274 __raw_writel(0x01, &port->regs->int_clock_threshold);
1275
1276 /* Populate queues with buffers, no failure after this point */
1277 for (i = 0; i < TX_DESCS; i++)
1278 queue_put_desc(port->plat->txreadyq,
1279 tx_desc_phys(port, i), tx_desc_ptr(port, i));
1280
1281 for (i = 0; i < RX_DESCS; i++)
1282 queue_put_desc(RXFREE_QUEUE(port->id),
1283 rx_desc_phys(port, i), rx_desc_ptr(port, i));
1284
1285 __raw_writel(TX_CNTRL1_RETRIES, &port->regs->tx_control[1]);
1286 __raw_writel(DEFAULT_TX_CNTRL0, &port->regs->tx_control[0]);
1287 __raw_writel(0, &port->regs->rx_control[1]);
1288 __raw_writel(DEFAULT_RX_CNTRL0, &port->regs->rx_control[0]);
1289
1290 napi_enable(&port->napi);
1291 eth_set_mcast_list(dev);
1292 netif_start_queue(dev);
1293
1294 qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
1295 eth_rx_irq, dev);
1296 if (!ports_open) {
1297 qmgr_set_irq(TXDONE_QUEUE, QUEUE_IRQ_SRC_NOT_EMPTY,
1298 eth_txdone_irq, NULL);
1299 qmgr_enable_irq(TXDONE_QUEUE);
1300 }
1301 ports_open++;
1302 /* we may already have RX data, enables IRQ */
1303 napi_schedule(&port->napi);
1304 return 0;
1305 }
1306
1307 static int eth_close(struct net_device *dev)
1308 {
1309 struct port *port = netdev_priv(dev);
1310 struct msg msg;
1311 int buffs = RX_DESCS; /* allocated RX buffers */
1312 int i;
1313
1314 ports_open--;
1315 qmgr_disable_irq(port->plat->rxq);
1316 napi_disable(&port->napi);
1317 netif_stop_queue(dev);
1318
1319 while (queue_get_desc(RXFREE_QUEUE(port->id), port, 0) >= 0)
1320 buffs--;
1321
1322 memset(&msg, 0, sizeof(msg));
1323 msg.cmd = NPE_SETLOOPBACK_MODE;
1324 msg.eth_id = port->id;
1325 msg.byte3 = 1;
1326 if (npe_send_recv_message(port->npe, &msg, "ETH_ENABLE_LOOPBACK"))
1327 printk(KERN_CRIT "%s: unable to enable loopback\n", dev->name);
1328
1329 i = 0;
1330 do { /* drain RX buffers */
1331 while (queue_get_desc(port->plat->rxq, port, 0) >= 0)
1332 buffs--;
1333 if (!buffs)
1334 break;
1335 if (qmgr_stat_empty(TX_QUEUE(port->id))) {
1336 /* we have to inject some packet */
1337 struct desc *desc;
1338 u32 phys;
1339 int n = queue_get_desc(port->plat->txreadyq, port, 1);
1340 BUG_ON(n < 0);
1341 desc = tx_desc_ptr(port, n);
1342 phys = tx_desc_phys(port, n);
1343 desc->buf_len = desc->pkt_len = 1;
1344 wmb();
1345 queue_put_desc(TX_QUEUE(port->id), phys, desc);
1346 }
1347 udelay(1);
1348 } while (++i < MAX_CLOSE_WAIT);
1349
1350 if (buffs)
1351 printk(KERN_CRIT "%s: unable to drain RX queue, %i buffer(s)"
1352 " left in NPE\n", dev->name, buffs);
1353 #if DEBUG_CLOSE
1354 if (!buffs)
1355 printk(KERN_DEBUG "Draining RX queue took %i cycles\n", i);
1356 #endif
1357
1358 buffs = TX_DESCS;
1359 while (queue_get_desc(TX_QUEUE(port->id), port, 1) >= 0)
1360 buffs--; /* cancel TX */
1361
1362 i = 0;
1363 do {
1364 while (queue_get_desc(port->plat->txreadyq, port, 1) >= 0)
1365 buffs--;
1366 if (!buffs)
1367 break;
1368 } while (++i < MAX_CLOSE_WAIT);
1369
1370 if (buffs)
1371 printk(KERN_CRIT "%s: unable to drain TX queue, %i buffer(s) "
1372 "left in NPE\n", dev->name, buffs);
1373 #if DEBUG_CLOSE
1374 if (!buffs)
1375 printk(KERN_DEBUG "Draining TX queues took %i cycles\n", i);
1376 #endif
1377
1378 msg.byte3 = 0;
1379 if (npe_send_recv_message(port->npe, &msg, "ETH_DISABLE_LOOPBACK"))
1380 printk(KERN_CRIT "%s: unable to disable loopback\n",
1381 dev->name);
1382
1383 phy_stop(port->phydev);
1384
1385 if (!ports_open)
1386 qmgr_disable_irq(TXDONE_QUEUE);
1387 destroy_queues(port);
1388 release_queues(port);
1389 return 0;
1390 }
1391
1392 static const struct net_device_ops ixp4xx_netdev_ops = {
1393 .ndo_open = eth_open,
1394 .ndo_stop = eth_close,
1395 .ndo_start_xmit = eth_xmit,
1396 .ndo_set_rx_mode = eth_set_mcast_list,
1397 .ndo_do_ioctl = eth_ioctl,
1398 .ndo_change_mtu = eth_change_mtu,
1399 .ndo_set_mac_address = eth_mac_addr,
1400 .ndo_validate_addr = eth_validate_addr,
1401 };
1402
1403 static int eth_init_one(struct platform_device *pdev)
1404 {
1405 struct port *port;
1406 struct net_device *dev;
1407 struct eth_plat_info *plat = dev_get_platdata(&pdev->dev);
1408 u32 regs_phys;
1409 char phy_id[MII_BUS_ID_SIZE + 3];
1410 int err;
1411
1412 if (!(dev = alloc_etherdev(sizeof(struct port))))
1413 return -ENOMEM;
1414
1415 SET_NETDEV_DEV(dev, &pdev->dev);
1416 port = netdev_priv(dev);
1417 port->netdev = dev;
1418 port->id = pdev->id;
1419
1420 switch (port->id) {
1421 case IXP4XX_ETH_NPEA:
1422 port->regs = (struct eth_regs __iomem *)IXP4XX_EthA_BASE_VIRT;
1423 regs_phys = IXP4XX_EthA_BASE_PHYS;
1424 break;
1425 case IXP4XX_ETH_NPEB:
1426 port->regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
1427 regs_phys = IXP4XX_EthB_BASE_PHYS;
1428 break;
1429 case IXP4XX_ETH_NPEC:
1430 port->regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
1431 regs_phys = IXP4XX_EthC_BASE_PHYS;
1432 break;
1433 default:
1434 err = -ENODEV;
1435 goto err_free;
1436 }
1437
1438 dev->netdev_ops = &ixp4xx_netdev_ops;
1439 dev->ethtool_ops = &ixp4xx_ethtool_ops;
1440 dev->tx_queue_len = 100;
1441
1442 netif_napi_add(dev, &port->napi, eth_poll, NAPI_WEIGHT);
1443
1444 if (!(port->npe = npe_request(NPE_ID(port->id)))) {
1445 err = -EIO;
1446 goto err_free;
1447 }
1448
1449 port->mem_res = request_mem_region(regs_phys, REGS_SIZE, dev->name);
1450 if (!port->mem_res) {
1451 err = -EBUSY;
1452 goto err_npe_rel;
1453 }
1454
1455 port->plat = plat;
1456 npe_port_tab[NPE_ID(port->id)] = port;
1457 memcpy(dev->dev_addr, plat->hwaddr, ETH_ALEN);
1458
1459 platform_set_drvdata(pdev, dev);
1460
1461 __raw_writel(DEFAULT_CORE_CNTRL | CORE_RESET,
1462 &port->regs->core_control);
1463 udelay(50);
1464 __raw_writel(DEFAULT_CORE_CNTRL, &port->regs->core_control);
1465 udelay(50);
1466
1467 snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT,
1468 mdio_bus->id, plat->phy);
1469 port->phydev = phy_connect(dev, phy_id, &ixp4xx_adjust_link,
1470 PHY_INTERFACE_MODE_MII);
1471 if (IS_ERR(port->phydev)) {
1472 err = PTR_ERR(port->phydev);
1473 goto err_free_mem;
1474 }
1475
1476 port->phydev->irq = PHY_POLL;
1477
1478 if ((err = register_netdev(dev)))
1479 goto err_phy_dis;
1480
1481 printk(KERN_INFO "%s: MII PHY %i on %s\n", dev->name, plat->phy,
1482 npe_name(port->npe));
1483
1484 return 0;
1485
1486 err_phy_dis:
1487 phy_disconnect(port->phydev);
1488 err_free_mem:
1489 npe_port_tab[NPE_ID(port->id)] = NULL;
1490 release_resource(port->mem_res);
1491 err_npe_rel:
1492 npe_release(port->npe);
1493 err_free:
1494 free_netdev(dev);
1495 return err;
1496 }
1497
1498 static int eth_remove_one(struct platform_device *pdev)
1499 {
1500 struct net_device *dev = platform_get_drvdata(pdev);
1501 struct port *port = netdev_priv(dev);
1502
1503 unregister_netdev(dev);
1504 phy_disconnect(port->phydev);
1505 npe_port_tab[NPE_ID(port->id)] = NULL;
1506 npe_release(port->npe);
1507 release_resource(port->mem_res);
1508 free_netdev(dev);
1509 return 0;
1510 }
1511
1512 static struct platform_driver ixp4xx_eth_driver = {
1513 .driver.name = DRV_NAME,
1514 .probe = eth_init_one,
1515 .remove = eth_remove_one,
1516 };
1517
1518 static int __init eth_init_module(void)
1519 {
1520 int err;
1521 if ((err = ixp4xx_mdio_register()))
1522 return err;
1523 return platform_driver_register(&ixp4xx_eth_driver);
1524 }
1525
1526 static void __exit eth_cleanup_module(void)
1527 {
1528 platform_driver_unregister(&ixp4xx_eth_driver);
1529 ixp4xx_mdio_remove();
1530 }
1531
1532 MODULE_AUTHOR("Krzysztof Halasa");
1533 MODULE_DESCRIPTION("Intel IXP4xx Ethernet driver");
1534 MODULE_LICENSE("GPL v2");
1535 MODULE_ALIAS("platform:ixp4xx_eth");
1536 module_init(eth_init_module);
1537 module_exit(eth_cleanup_module);
Linux kernel - Deliverables
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