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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / xscale / ixp4xx_eth.c
blob269596c15133d01008d699baf47ec6a8ecef8a5d
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Intel IXP4xx Ethernet driver for Linux
4 *
5 * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
6 *
7 * Ethernet port config (0x00 is not present on IXP42X):
8 *
9 * logical port 0x00 0x10 0x20
10 * NPE 0 (NPE-A) 1 (NPE-B) 2 (NPE-C)
11 * physical PortId 2 0 1
12 * TX queue 23 24 25
13 * RX-free queue 26 27 28
14 * TX-done queue is always 31, per-port RX and TX-ready queues are configurable
15 *
16 * Queue entries:
17 * bits 0 -> 1 - NPE ID (RX and TX-done)
18 * bits 0 -> 2 - priority (TX, per 802.1D)
19 * bits 3 -> 4 - port ID (user-set?)
20 * bits 5 -> 31 - physical descriptor address
21 */
22
23 #include <linux/delay.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/dmapool.h>
26 #include <linux/etherdevice.h>
27 #include <linux/io.h>
28 #include <linux/kernel.h>
29 #include <linux/net_tstamp.h>
30 #include <linux/of.h>
31 #include <linux/phy.h>
32 #include <linux/platform_data/eth_ixp4xx.h>
33 #include <linux/platform_device.h>
34 #include <linux/ptp_classify.h>
35 #include <linux/slab.h>
36 #include <linux/module.h>
37 #include <linux/soc/ixp4xx/npe.h>
38 #include <linux/soc/ixp4xx/qmgr.h>
39
40 #include "ixp46x_ts.h"
41
42 #define DEBUG_DESC 0
43 #define DEBUG_RX 0
44 #define DEBUG_TX 0
45 #define DEBUG_PKT_BYTES 0
46 #define DEBUG_MDIO 0
47 #define DEBUG_CLOSE 0
48
49 #define DRV_NAME "ixp4xx_eth"
50
51 #define MAX_NPES 3
52
53 #define RX_DESCS 64 /* also length of all RX queues */
54 #define TX_DESCS 16 /* also length of all TX queues */
55 #define TXDONE_QUEUE_LEN 64 /* dwords */
56
57 #define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
58 #define REGS_SIZE 0x1000
59 #define MAX_MRU 1536 /* 0x600 */
60 #define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
61
62 #define NAPI_WEIGHT 16
63 #define MDIO_INTERVAL (3 * HZ)
64 #define MAX_MDIO_RETRIES 100 /* microseconds, typically 30 cycles */
65 #define MAX_CLOSE_WAIT 1000 /* microseconds, typically 2-3 cycles */
66
67 #define NPE_ID(port_id) ((port_id) >> 4)
68 #define PHYSICAL_ID(port_id) ((NPE_ID(port_id) + 2) % 3)
69 #define TX_QUEUE(port_id) (NPE_ID(port_id) + 23)
70 #define RXFREE_QUEUE(port_id) (NPE_ID(port_id) + 26)
71 #define TXDONE_QUEUE 31
72
73 #define PTP_SLAVE_MODE 1
74 #define PTP_MASTER_MODE 2
75 #define PORT2CHANNEL(p) NPE_ID(p->id)
76
77 /* TX Control Registers */
78 #define TX_CNTRL0_TX_EN 0x01
79 #define TX_CNTRL0_HALFDUPLEX 0x02
80 #define TX_CNTRL0_RETRY 0x04
81 #define TX_CNTRL0_PAD_EN 0x08
82 #define TX_CNTRL0_APPEND_FCS 0x10
83 #define TX_CNTRL0_2DEFER 0x20
84 #define TX_CNTRL0_RMII 0x40 /* reduced MII */
85 #define TX_CNTRL1_RETRIES 0x0F /* 4 bits */
86
87 /* RX Control Registers */
88 #define RX_CNTRL0_RX_EN 0x01
89 #define RX_CNTRL0_PADSTRIP_EN 0x02
90 #define RX_CNTRL0_SEND_FCS 0x04
91 #define RX_CNTRL0_PAUSE_EN 0x08
92 #define RX_CNTRL0_LOOP_EN 0x10
93 #define RX_CNTRL0_ADDR_FLTR_EN 0x20
94 #define RX_CNTRL0_RX_RUNT_EN 0x40
95 #define RX_CNTRL0_BCAST_DIS 0x80
96 #define RX_CNTRL1_DEFER_EN 0x01
97
98 /* Core Control Register */
99 #define CORE_RESET 0x01
100 #define CORE_RX_FIFO_FLUSH 0x02
101 #define CORE_TX_FIFO_FLUSH 0x04
102 #define CORE_SEND_JAM 0x08
103 #define CORE_MDC_EN 0x10 /* MDIO using NPE-B ETH-0 only */
104
105 #define DEFAULT_TX_CNTRL0 (TX_CNTRL0_TX_EN | TX_CNTRL0_RETRY | \
106 TX_CNTRL0_PAD_EN | TX_CNTRL0_APPEND_FCS | \
107 TX_CNTRL0_2DEFER)
108 #define DEFAULT_RX_CNTRL0 RX_CNTRL0_RX_EN
109 #define DEFAULT_CORE_CNTRL CORE_MDC_EN
110
111
112 /* NPE message codes */
113 #define NPE_GETSTATUS 0x00
114 #define NPE_EDB_SETPORTADDRESS 0x01
115 #define NPE_EDB_GETMACADDRESSDATABASE 0x02
116 #define NPE_EDB_SETMACADDRESSSDATABASE 0x03
117 #define NPE_GETSTATS 0x04
118 #define NPE_RESETSTATS 0x05
119 #define NPE_SETMAXFRAMELENGTHS 0x06
120 #define NPE_VLAN_SETRXTAGMODE 0x07
121 #define NPE_VLAN_SETDEFAULTRXVID 0x08
122 #define NPE_VLAN_SETPORTVLANTABLEENTRY 0x09
123 #define NPE_VLAN_SETPORTVLANTABLERANGE 0x0A
124 #define NPE_VLAN_SETRXQOSENTRY 0x0B
125 #define NPE_VLAN_SETPORTIDEXTRACTIONMODE 0x0C
126 #define NPE_STP_SETBLOCKINGSTATE 0x0D
127 #define NPE_FW_SETFIREWALLMODE 0x0E
128 #define NPE_PC_SETFRAMECONTROLDURATIONID 0x0F
129 #define NPE_PC_SETAPMACTABLE 0x11
130 #define NPE_SETLOOPBACK_MODE 0x12
131 #define NPE_PC_SETBSSIDTABLE 0x13
132 #define NPE_ADDRESS_FILTER_CONFIG 0x14
133 #define NPE_APPENDFCSCONFIG 0x15
134 #define NPE_NOTIFY_MAC_RECOVERY_DONE 0x16
135 #define NPE_MAC_RECOVERY_START 0x17
136
137
138 #ifdef __ARMEB__
139 typedef struct sk_buff buffer_t;
140 #define free_buffer dev_kfree_skb
141 #define free_buffer_irq dev_consume_skb_irq
142 #else
143 typedef void buffer_t;
144 #define free_buffer kfree
145 #define free_buffer_irq kfree
146 #endif
147
148 struct eth_regs {
149 u32 tx_control[2], __res1[2]; /* 000 */
150 u32 rx_control[2], __res2[2]; /* 010 */
151 u32 random_seed, __res3[3]; /* 020 */
152 u32 partial_empty_threshold, __res4; /* 030 */
153 u32 partial_full_threshold, __res5; /* 038 */
154 u32 tx_start_bytes, __res6[3]; /* 040 */
155 u32 tx_deferral, rx_deferral, __res7[2];/* 050 */
156 u32 tx_2part_deferral[2], __res8[2]; /* 060 */
157 u32 slot_time, __res9[3]; /* 070 */
158 u32 mdio_command[4]; /* 080 */
159 u32 mdio_status[4]; /* 090 */
160 u32 mcast_mask[6], __res10[2]; /* 0A0 */
161 u32 mcast_addr[6], __res11[2]; /* 0C0 */
162 u32 int_clock_threshold, __res12[3]; /* 0E0 */
163 u32 hw_addr[6], __res13[61]; /* 0F0 */
164 u32 core_control; /* 1FC */
165 };
166
167 struct port {
168 struct resource *mem_res;
169 struct eth_regs __iomem *regs;
170 struct npe *npe;
171 struct net_device *netdev;
172 struct napi_struct napi;
173 struct eth_plat_info *plat;
174 buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
175 struct desc *desc_tab; /* coherent */
176 u32 desc_tab_phys;
177 int id; /* logical port ID */
178 int speed, duplex;
179 u8 firmware[4];
180 int hwts_tx_en;
181 int hwts_rx_en;
182 };
183
184 /* NPE message structure */
185 struct msg {
186 #ifdef __ARMEB__
187 u8 cmd, eth_id, byte2, byte3;
188 u8 byte4, byte5, byte6, byte7;
189 #else
190 u8 byte3, byte2, eth_id, cmd;
191 u8 byte7, byte6, byte5, byte4;
192 #endif
193 };
194
195 /* Ethernet packet descriptor */
196 struct desc {
197 u32 next; /* pointer to next buffer, unused */
198
199 #ifdef __ARMEB__
200 u16 buf_len; /* buffer length */
201 u16 pkt_len; /* packet length */
202 u32 data; /* pointer to data buffer in RAM */
203 u8 dest_id;
204 u8 src_id;
205 u16 flags;
206 u8 qos;
207 u8 padlen;
208 u16 vlan_tci;
209 #else
210 u16 pkt_len; /* packet length */
211 u16 buf_len; /* buffer length */
212 u32 data; /* pointer to data buffer in RAM */
213 u16 flags;
214 u8 src_id;
215 u8 dest_id;
216 u16 vlan_tci;
217 u8 padlen;
218 u8 qos;
219 #endif
220
221 #ifdef __ARMEB__
222 u8 dst_mac_0, dst_mac_1, dst_mac_2, dst_mac_3;
223 u8 dst_mac_4, dst_mac_5, src_mac_0, src_mac_1;
224 u8 src_mac_2, src_mac_3, src_mac_4, src_mac_5;
225 #else
226 u8 dst_mac_3, dst_mac_2, dst_mac_1, dst_mac_0;
227 u8 src_mac_1, src_mac_0, dst_mac_5, dst_mac_4;
228 u8 src_mac_5, src_mac_4, src_mac_3, src_mac_2;
229 #endif
230 };
231
232
233 #define rx_desc_phys(port, n) ((port)->desc_tab_phys + \
234 (n) * sizeof(struct desc))
235 #define rx_desc_ptr(port, n) (&(port)->desc_tab[n])
236
237 #define tx_desc_phys(port, n) ((port)->desc_tab_phys + \
238 ((n) + RX_DESCS) * sizeof(struct desc))
239 #define tx_desc_ptr(port, n) (&(port)->desc_tab[(n) + RX_DESCS])
240
241 #ifndef __ARMEB__
242 static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
243 {
244 int i;
245 for (i = 0; i < cnt; i++)
246 dest[i] = swab32(src[i]);
247 }
248 #endif
249
250 static spinlock_t mdio_lock;
251 static struct eth_regs __iomem *mdio_regs; /* mdio command and status only */
252 static struct mii_bus *mdio_bus;
253 static int ports_open;
254 static struct port *npe_port_tab[MAX_NPES];
255 static struct dma_pool *dma_pool;
256
257 static int ixp_ptp_match(struct sk_buff *skb, u16 uid_hi, u32 uid_lo, u16 seqid)
258 {
259 u8 *data = skb->data;
260 unsigned int offset;
261 u16 *hi, *id;
262 u32 lo;
263
264 if (ptp_classify_raw(skb) != PTP_CLASS_V1_IPV4)
265 return 0;
266
267 offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN;
268
269 if (skb->len < offset + OFF_PTP_SEQUENCE_ID + sizeof(seqid))
270 return 0;
271
272 hi = (u16 *)(data + offset + OFF_PTP_SOURCE_UUID);
273 id = (u16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
274
275 memcpy(&lo, &hi[1], sizeof(lo));
276
277 return (uid_hi == ntohs(*hi) &&
278 uid_lo == ntohl(lo) &&
279 seqid == ntohs(*id));
280 }
281
282 static void ixp_rx_timestamp(struct port *port, struct sk_buff *skb)
283 {
284 struct skb_shared_hwtstamps *shhwtstamps;
285 struct ixp46x_ts_regs *regs;
286 u64 ns;
287 u32 ch, hi, lo, val;
288 u16 uid, seq;
289
290 if (!port->hwts_rx_en)
291 return;
292
293 ch = PORT2CHANNEL(port);
294
295 regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
296
297 val = __raw_readl(&regs->channel[ch].ch_event);
298
299 if (!(val & RX_SNAPSHOT_LOCKED))
300 return;
301
302 lo = __raw_readl(&regs->channel[ch].src_uuid_lo);
303 hi = __raw_readl(&regs->channel[ch].src_uuid_hi);
304
305 uid = hi & 0xffff;
306 seq = (hi >> 16) & 0xffff;
307
308 if (!ixp_ptp_match(skb, htons(uid), htonl(lo), htons(seq)))
309 goto out;
310
311 lo = __raw_readl(&regs->channel[ch].rx_snap_lo);
312 hi = __raw_readl(&regs->channel[ch].rx_snap_hi);
313 ns = ((u64) hi) << 32;
314 ns |= lo;
315 ns <<= TICKS_NS_SHIFT;
316
317 shhwtstamps = skb_hwtstamps(skb);
318 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
319 shhwtstamps->hwtstamp = ns_to_ktime(ns);
320 out:
321 __raw_writel(RX_SNAPSHOT_LOCKED, &regs->channel[ch].ch_event);
322 }
323
324 static void ixp_tx_timestamp(struct port *port, struct sk_buff *skb)
325 {
326 struct skb_shared_hwtstamps shhwtstamps;
327 struct ixp46x_ts_regs *regs;
328 struct skb_shared_info *shtx;
329 u64 ns;
330 u32 ch, cnt, hi, lo, val;
331
332 shtx = skb_shinfo(skb);
333 if (unlikely(shtx->tx_flags & SKBTX_HW_TSTAMP && port->hwts_tx_en))
334 shtx->tx_flags |= SKBTX_IN_PROGRESS;
335 else
336 return;
337
338 ch = PORT2CHANNEL(port);
339
340 regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
341
342 /*
343 * This really stinks, but we have to poll for the Tx time stamp.
344 * Usually, the time stamp is ready after 4 to 6 microseconds.
345 */
346 for (cnt = 0; cnt < 100; cnt++) {
347 val = __raw_readl(&regs->channel[ch].ch_event);
348 if (val & TX_SNAPSHOT_LOCKED)
349 break;
350 udelay(1);
351 }
352 if (!(val & TX_SNAPSHOT_LOCKED)) {
353 shtx->tx_flags &= ~SKBTX_IN_PROGRESS;
354 return;
355 }
356
357 lo = __raw_readl(&regs->channel[ch].tx_snap_lo);
358 hi = __raw_readl(&regs->channel[ch].tx_snap_hi);
359 ns = ((u64) hi) << 32;
360 ns |= lo;
361 ns <<= TICKS_NS_SHIFT;
362
363 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
364 shhwtstamps.hwtstamp = ns_to_ktime(ns);
365 skb_tstamp_tx(skb, &shhwtstamps);
366
367 __raw_writel(TX_SNAPSHOT_LOCKED, &regs->channel[ch].ch_event);
368 }
369
370 static int hwtstamp_set(struct net_device *netdev, struct ifreq *ifr)
371 {
372 struct hwtstamp_config cfg;
373 struct ixp46x_ts_regs *regs;
374 struct port *port = netdev_priv(netdev);
375 int ch;
376
377 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
378 return -EFAULT;
379
380 if (cfg.flags) /* reserved for future extensions */
381 return -EINVAL;
382
383 ch = PORT2CHANNEL(port);
384 regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
385
386 if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
387 return -ERANGE;
388
389 switch (cfg.rx_filter) {
390 case HWTSTAMP_FILTER_NONE:
391 port->hwts_rx_en = 0;
392 break;
393 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
394 port->hwts_rx_en = PTP_SLAVE_MODE;
395 __raw_writel(0, &regs->channel[ch].ch_control);
396 break;
397 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
398 port->hwts_rx_en = PTP_MASTER_MODE;
399 __raw_writel(MASTER_MODE, &regs->channel[ch].ch_control);
400 break;
401 default:
402 return -ERANGE;
403 }
404
405 port->hwts_tx_en = cfg.tx_type == HWTSTAMP_TX_ON;
406
407 /* Clear out any old time stamps. */
408 __raw_writel(TX_SNAPSHOT_LOCKED | RX_SNAPSHOT_LOCKED,
409 &regs->channel[ch].ch_event);
410
411 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
412 }
413
414 static int hwtstamp_get(struct net_device *netdev, struct ifreq *ifr)
415 {
416 struct hwtstamp_config cfg;
417 struct port *port = netdev_priv(netdev);
418
419 cfg.flags = 0;
420 cfg.tx_type = port->hwts_tx_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
421
422 switch (port->hwts_rx_en) {
423 case 0:
424 cfg.rx_filter = HWTSTAMP_FILTER_NONE;
425 break;
426 case PTP_SLAVE_MODE:
427 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC;
428 break;
429 case PTP_MASTER_MODE:
430 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ;
431 break;
432 default:
433 WARN_ON_ONCE(1);
434 return -ERANGE;
435 }
436
437 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
438 }
439
440 static int ixp4xx_mdio_cmd(struct mii_bus *bus, int phy_id, int location,
441 int write, u16 cmd)
442 {
443 int cycles = 0;
444
445 if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) {
446 printk(KERN_ERR "%s: MII not ready to transmit\n", bus->name);
447 return -1;
448 }
449
450 if (write) {
451 __raw_writel(cmd & 0xFF, &mdio_regs->mdio_command[0]);
452 __raw_writel(cmd >> 8, &mdio_regs->mdio_command[1]);
453 }
454 __raw_writel(((phy_id << 5) | location) & 0xFF,
455 &mdio_regs->mdio_command[2]);
456 __raw_writel((phy_id >> 3) | (write << 2) | 0x80 /* GO */,
457 &mdio_regs->mdio_command[3]);
458
459 while ((cycles < MAX_MDIO_RETRIES) &&
460 (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80)) {
461 udelay(1);
462 cycles++;
463 }
464
465 if (cycles == MAX_MDIO_RETRIES) {
466 printk(KERN_ERR "%s #%i: MII write failed\n", bus->name,
467 phy_id);
468 return -1;
469 }
470
471 #if DEBUG_MDIO
472 printk(KERN_DEBUG "%s #%i: mdio_%s() took %i cycles\n", bus->name,
473 phy_id, write ? "write" : "read", cycles);
474 #endif
475
476 if (write)
477 return 0;
478
479 if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) {
480 #if DEBUG_MDIO
481 printk(KERN_DEBUG "%s #%i: MII read failed\n", bus->name,
482 phy_id);
483 #endif
484 return 0xFFFF; /* don't return error */
485 }
486
487 return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) |
488 ((__raw_readl(&mdio_regs->mdio_status[1]) & 0xFF) << 8);
489 }
490
491 static int ixp4xx_mdio_read(struct mii_bus *bus, int phy_id, int location)
492 {
493 unsigned long flags;
494 int ret;
495
496 spin_lock_irqsave(&mdio_lock, flags);
497 ret = ixp4xx_mdio_cmd(bus, phy_id, location, 0, 0);
498 spin_unlock_irqrestore(&mdio_lock, flags);
499 #if DEBUG_MDIO
500 printk(KERN_DEBUG "%s #%i: MII read [%i] -> 0x%X\n", bus->name,
501 phy_id, location, ret);
502 #endif
503 return ret;
504 }
505
506 static int ixp4xx_mdio_write(struct mii_bus *bus, int phy_id, int location,
507 u16 val)
508 {
509 unsigned long flags;
510 int ret;
511
512 spin_lock_irqsave(&mdio_lock, flags);
513 ret = ixp4xx_mdio_cmd(bus, phy_id, location, 1, val);
514 spin_unlock_irqrestore(&mdio_lock, flags);
515 #if DEBUG_MDIO
516 printk(KERN_DEBUG "%s #%i: MII write [%i] <- 0x%X, err = %i\n",
517 bus->name, phy_id, location, val, ret);
518 #endif
519 return ret;
520 }
521
522 static int ixp4xx_mdio_register(struct eth_regs __iomem *regs)
523 {
524 int err;
525
526 if (!(mdio_bus = mdiobus_alloc()))
527 return -ENOMEM;
528
529 mdio_regs = regs;
530 __raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
531 spin_lock_init(&mdio_lock);
532 mdio_bus->name = "IXP4xx MII Bus";
533 mdio_bus->read = &ixp4xx_mdio_read;
534 mdio_bus->write = &ixp4xx_mdio_write;
535 snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "ixp4xx-eth-0");
536
537 if ((err = mdiobus_register(mdio_bus)))
538 mdiobus_free(mdio_bus);
539 return err;
540 }
541
542 static void ixp4xx_mdio_remove(void)
543 {
544 mdiobus_unregister(mdio_bus);
545 mdiobus_free(mdio_bus);
546 }
547
548
549 static void ixp4xx_adjust_link(struct net_device *dev)
550 {
551 struct port *port = netdev_priv(dev);
552 struct phy_device *phydev = dev->phydev;
553
554 if (!phydev->link) {
555 if (port->speed) {
556 port->speed = 0;
557 printk(KERN_INFO "%s: link down\n", dev->name);
558 }
559 return;
560 }
561
562 if (port->speed == phydev->speed && port->duplex == phydev->duplex)
563 return;
564
565 port->speed = phydev->speed;
566 port->duplex = phydev->duplex;
567
568 if (port->duplex)
569 __raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX,
570 &port->regs->tx_control[0]);
571 else
572 __raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
573 &port->regs->tx_control[0]);
574
575 netdev_info(dev, "%s: link up, speed %u Mb/s, %s duplex\n",
576 dev->name, port->speed, port->duplex ? "full" : "half");
577 }
578
579
580 static inline void debug_pkt(struct net_device *dev, const char *func,
581 u8 *data, int len)
582 {
583 #if DEBUG_PKT_BYTES
584 int i;
585
586 netdev_debug(dev, "%s(%i) ", func, len);
587 for (i = 0; i < len; i++) {
588 if (i >= DEBUG_PKT_BYTES)
589 break;
590 printk("%s%02X",
591 ((i == 6) || (i == 12) || (i >= 14)) ? " " : "",
592 data[i]);
593 }
594 printk("\n");
595 #endif
596 }
597
598
599 static inline void debug_desc(u32 phys, struct desc *desc)
600 {
601 #if DEBUG_DESC
602 printk(KERN_DEBUG "%X: %X %3X %3X %08X %2X < %2X %4X %X"
603 " %X %X %02X%02X%02X%02X%02X%02X < %02X%02X%02X%02X%02X%02X\n",
604 phys, desc->next, desc->buf_len, desc->pkt_len,
605 desc->data, desc->dest_id, desc->src_id, desc->flags,
606 desc->qos, desc->padlen, desc->vlan_tci,
607 desc->dst_mac_0, desc->dst_mac_1, desc->dst_mac_2,
608 desc->dst_mac_3, desc->dst_mac_4, desc->dst_mac_5,
609 desc->src_mac_0, desc->src_mac_1, desc->src_mac_2,
610 desc->src_mac_3, desc->src_mac_4, desc->src_mac_5);
611 #endif
612 }
613
614 static inline int queue_get_desc(unsigned int queue, struct port *port,
615 int is_tx)
616 {
617 u32 phys, tab_phys, n_desc;
618 struct desc *tab;
619
620 if (!(phys = qmgr_get_entry(queue)))
621 return -1;
622
623 phys &= ~0x1F; /* mask out non-address bits */
624 tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0);
625 tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0);
626 n_desc = (phys - tab_phys) / sizeof(struct desc);
627 BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS));
628 debug_desc(phys, &tab[n_desc]);
629 BUG_ON(tab[n_desc].next);
630 return n_desc;
631 }
632
633 static inline void queue_put_desc(unsigned int queue, u32 phys,
634 struct desc *desc)
635 {
636 debug_desc(phys, desc);
637 BUG_ON(phys & 0x1F);
638 qmgr_put_entry(queue, phys);
639 /* Don't check for queue overflow here, we've allocated sufficient
640 length and queues >= 32 don't support this check anyway. */
641 }
642
643
644 static inline void dma_unmap_tx(struct port *port, struct desc *desc)
645 {
646 #ifdef __ARMEB__
647 dma_unmap_single(&port->netdev->dev, desc->data,
648 desc->buf_len, DMA_TO_DEVICE);
649 #else
650 dma_unmap_single(&port->netdev->dev, desc->data & ~3,
651 ALIGN((desc->data & 3) + desc->buf_len, 4),
652 DMA_TO_DEVICE);
653 #endif
654 }
655
656
657 static void eth_rx_irq(void *pdev)
658 {
659 struct net_device *dev = pdev;
660 struct port *port = netdev_priv(dev);
661
662 #if DEBUG_RX
663 printk(KERN_DEBUG "%s: eth_rx_irq\n", dev->name);
664 #endif
665 qmgr_disable_irq(port->plat->rxq);
666 napi_schedule(&port->napi);
667 }
668
669 static int eth_poll(struct napi_struct *napi, int budget)
670 {
671 struct port *port = container_of(napi, struct port, napi);
672 struct net_device *dev = port->netdev;
673 unsigned int rxq = port->plat->rxq, rxfreeq = RXFREE_QUEUE(port->id);
674 int received = 0;
675
676 #if DEBUG_RX
677 netdev_debug(dev, "eth_poll\n");
678 #endif
679
680 while (received < budget) {
681 struct sk_buff *skb;
682 struct desc *desc;
683 int n;
684 #ifdef __ARMEB__
685 struct sk_buff *temp;
686 u32 phys;
687 #endif
688
689 if ((n = queue_get_desc(rxq, port, 0)) < 0) {
690 #if DEBUG_RX
691 netdev_debug(dev, "eth_poll napi_complete\n");
692 #endif
693 napi_complete(napi);
694 qmgr_enable_irq(rxq);
695 if (!qmgr_stat_below_low_watermark(rxq) &&
696 napi_reschedule(napi)) { /* not empty again */
697 #if DEBUG_RX
698 netdev_debug(dev, "eth_poll napi_reschedule succeeded\n");
699 #endif
700 qmgr_disable_irq(rxq);
701 continue;
702 }
703 #if DEBUG_RX
704 netdev_debug(dev, "eth_poll all done\n");
705 #endif
706 return received; /* all work done */
707 }
708
709 desc = rx_desc_ptr(port, n);
710
711 #ifdef __ARMEB__
712 if ((skb = netdev_alloc_skb(dev, RX_BUFF_SIZE))) {
713 phys = dma_map_single(&dev->dev, skb->data,
714 RX_BUFF_SIZE, DMA_FROM_DEVICE);
715 if (dma_mapping_error(&dev->dev, phys)) {
716 dev_kfree_skb(skb);
717 skb = NULL;
718 }
719 }
720 #else
721 skb = netdev_alloc_skb(dev,
722 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4));
723 #endif
724
725 if (!skb) {
726 dev->stats.rx_dropped++;
727 /* put the desc back on RX-ready queue */
728 desc->buf_len = MAX_MRU;
729 desc->pkt_len = 0;
730 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
731 continue;
732 }
733
734 /* process received frame */
735 #ifdef __ARMEB__
736 temp = skb;
737 skb = port->rx_buff_tab[n];
738 dma_unmap_single(&dev->dev, desc->data - NET_IP_ALIGN,
739 RX_BUFF_SIZE, DMA_FROM_DEVICE);
740 #else
741 dma_sync_single_for_cpu(&dev->dev, desc->data - NET_IP_ALIGN,
742 RX_BUFF_SIZE, DMA_FROM_DEVICE);
743 memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
744 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4) / 4);
745 #endif
746 skb_reserve(skb, NET_IP_ALIGN);
747 skb_put(skb, desc->pkt_len);
748
749 debug_pkt(dev, "eth_poll", skb->data, skb->len);
750
751 ixp_rx_timestamp(port, skb);
752 skb->protocol = eth_type_trans(skb, dev);
753 dev->stats.rx_packets++;
754 dev->stats.rx_bytes += skb->len;
755 netif_receive_skb(skb);
756
757 /* put the new buffer on RX-free queue */
758 #ifdef __ARMEB__
759 port->rx_buff_tab[n] = temp;
760 desc->data = phys + NET_IP_ALIGN;
761 #endif
762 desc->buf_len = MAX_MRU;
763 desc->pkt_len = 0;
764 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
765 received++;
766 }
767
768 #if DEBUG_RX
769 netdev_debug(dev, "eth_poll(): end, not all work done\n");
770 #endif
771 return received; /* not all work done */
772 }
773
774
775 static void eth_txdone_irq(void *unused)
776 {
777 u32 phys;
778
779 #if DEBUG_TX
780 printk(KERN_DEBUG DRV_NAME ": eth_txdone_irq\n");
781 #endif
782 while ((phys = qmgr_get_entry(TXDONE_QUEUE)) != 0) {
783 u32 npe_id, n_desc;
784 struct port *port;
785 struct desc *desc;
786 int start;
787
788 npe_id = phys & 3;
789 BUG_ON(npe_id >= MAX_NPES);
790 port = npe_port_tab[npe_id];
791 BUG_ON(!port);
792 phys &= ~0x1F; /* mask out non-address bits */
793 n_desc = (phys - tx_desc_phys(port, 0)) / sizeof(struct desc);
794 BUG_ON(n_desc >= TX_DESCS);
795 desc = tx_desc_ptr(port, n_desc);
796 debug_desc(phys, desc);
797
798 if (port->tx_buff_tab[n_desc]) { /* not the draining packet */
799 port->netdev->stats.tx_packets++;
800 port->netdev->stats.tx_bytes += desc->pkt_len;
801
802 dma_unmap_tx(port, desc);
803 #if DEBUG_TX
804 printk(KERN_DEBUG "%s: eth_txdone_irq free %p\n",
805 port->netdev->name, port->tx_buff_tab[n_desc]);
806 #endif
807 free_buffer_irq(port->tx_buff_tab[n_desc]);
808 port->tx_buff_tab[n_desc] = NULL;
809 }
810
811 start = qmgr_stat_below_low_watermark(port->plat->txreadyq);
812 queue_put_desc(port->plat->txreadyq, phys, desc);
813 if (start) { /* TX-ready queue was empty */
814 #if DEBUG_TX
815 printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n",
816 port->netdev->name);
817 #endif
818 netif_wake_queue(port->netdev);
819 }
820 }
821 }
822
823 static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
824 {
825 struct port *port = netdev_priv(dev);
826 unsigned int txreadyq = port->plat->txreadyq;
827 int len, offset, bytes, n;
828 void *mem;
829 u32 phys;
830 struct desc *desc;
831
832 #if DEBUG_TX
833 netdev_debug(dev, "eth_xmit\n");
834 #endif
835
836 if (unlikely(skb->len > MAX_MRU)) {
837 dev_kfree_skb(skb);
838 dev->stats.tx_errors++;
839 return NETDEV_TX_OK;
840 }
841
842 debug_pkt(dev, "eth_xmit", skb->data, skb->len);
843
844 len = skb->len;
845 #ifdef __ARMEB__
846 offset = 0; /* no need to keep alignment */
847 bytes = len;
848 mem = skb->data;
849 #else
850 offset = (int)skb->data & 3; /* keep 32-bit alignment */
851 bytes = ALIGN(offset + len, 4);
852 if (!(mem = kmalloc(bytes, GFP_ATOMIC))) {
853 dev_kfree_skb(skb);
854 dev->stats.tx_dropped++;
855 return NETDEV_TX_OK;
856 }
857 memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4);
858 #endif
859
860 phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
861 if (dma_mapping_error(&dev->dev, phys)) {
862 dev_kfree_skb(skb);
863 #ifndef __ARMEB__
864 kfree(mem);
865 #endif
866 dev->stats.tx_dropped++;
867 return NETDEV_TX_OK;
868 }
869
870 n = queue_get_desc(txreadyq, port, 1);
871 BUG_ON(n < 0);
872 desc = tx_desc_ptr(port, n);
873
874 #ifdef __ARMEB__
875 port->tx_buff_tab[n] = skb;
876 #else
877 port->tx_buff_tab[n] = mem;
878 #endif
879 desc->data = phys + offset;
880 desc->buf_len = desc->pkt_len = len;
881
882 /* NPE firmware pads short frames with zeros internally */
883 wmb();
884 queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc);
885
886 if (qmgr_stat_below_low_watermark(txreadyq)) { /* empty */
887 #if DEBUG_TX
888 netdev_debug(dev, "eth_xmit queue full\n");
889 #endif
890 netif_stop_queue(dev);
891 /* we could miss TX ready interrupt */
892 /* really empty in fact */
893 if (!qmgr_stat_below_low_watermark(txreadyq)) {
894 #if DEBUG_TX
895 netdev_debug(dev, "eth_xmit ready again\n");
896 #endif
897 netif_wake_queue(dev);
898 }
899 }
900
901 #if DEBUG_TX
902 netdev_debug(dev, "eth_xmit end\n");
903 #endif
904
905 ixp_tx_timestamp(port, skb);
906 skb_tx_timestamp(skb);
907
908 #ifndef __ARMEB__
909 dev_kfree_skb(skb);
910 #endif
911 return NETDEV_TX_OK;
912 }
913
914
915 static void eth_set_mcast_list(struct net_device *dev)
916 {
917 struct port *port = netdev_priv(dev);
918 struct netdev_hw_addr *ha;
919 u8 diffs[ETH_ALEN], *addr;
920 int i;
921 static const u8 allmulti[] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
922
923 if ((dev->flags & IFF_ALLMULTI) && !(dev->flags & IFF_PROMISC)) {
924 for (i = 0; i < ETH_ALEN; i++) {
925 __raw_writel(allmulti[i], &port->regs->mcast_addr[i]);
926 __raw_writel(allmulti[i], &port->regs->mcast_mask[i]);
927 }
928 __raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
929 &port->regs->rx_control[0]);
930 return;
931 }
932
933 if ((dev->flags & IFF_PROMISC) || netdev_mc_empty(dev)) {
934 __raw_writel(DEFAULT_RX_CNTRL0 & ~RX_CNTRL0_ADDR_FLTR_EN,
935 &port->regs->rx_control[0]);
936 return;
937 }
938
939 eth_zero_addr(diffs);
940
941 addr = NULL;
942 netdev_for_each_mc_addr(ha, dev) {
943 if (!addr)
944 addr = ha->addr; /* first MAC address */
945 for (i = 0; i < ETH_ALEN; i++)
946 diffs[i] |= addr[i] ^ ha->addr[i];
947 }
948
949 for (i = 0; i < ETH_ALEN; i++) {
950 __raw_writel(addr[i], &port->regs->mcast_addr[i]);
951 __raw_writel(~diffs[i], &port->regs->mcast_mask[i]);
952 }
953
954 __raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
955 &port->regs->rx_control[0]);
956 }
957
958
959 static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
960 {
961 if (!netif_running(dev))
962 return -EINVAL;
963
964 if (cpu_is_ixp46x()) {
965 if (cmd == SIOCSHWTSTAMP)
966 return hwtstamp_set(dev, req);
967 if (cmd == SIOCGHWTSTAMP)
968 return hwtstamp_get(dev, req);
969 }
970
971 return phy_mii_ioctl(dev->phydev, req, cmd);
972 }
973
974 /* ethtool support */
975
976 static void ixp4xx_get_drvinfo(struct net_device *dev,
977 struct ethtool_drvinfo *info)
978 {
979 struct port *port = netdev_priv(dev);
980
981 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
982 snprintf(info->fw_version, sizeof(info->fw_version), "%u:%u:%u:%u",
983 port->firmware[0], port->firmware[1],
984 port->firmware[2], port->firmware[3]);
985 strlcpy(info->bus_info, "internal", sizeof(info->bus_info));
986 }
987
988 int ixp46x_phc_index = -1;
989 EXPORT_SYMBOL_GPL(ixp46x_phc_index);
990
991 static int ixp4xx_get_ts_info(struct net_device *dev,
992 struct ethtool_ts_info *info)
993 {
994 if (!cpu_is_ixp46x()) {
995 info->so_timestamping =
996 SOF_TIMESTAMPING_TX_SOFTWARE |
997 SOF_TIMESTAMPING_RX_SOFTWARE |
998 SOF_TIMESTAMPING_SOFTWARE;
999 info->phc_index = -1;
1000 return 0;
1001 }
1002 info->so_timestamping =
1003 SOF_TIMESTAMPING_TX_HARDWARE |
1004 SOF_TIMESTAMPING_RX_HARDWARE |
1005 SOF_TIMESTAMPING_RAW_HARDWARE;
1006 info->phc_index = ixp46x_phc_index;
1007 info->tx_types =
1008 (1 << HWTSTAMP_TX_OFF) |
1009 (1 << HWTSTAMP_TX_ON);
1010 info->rx_filters =
1011 (1 << HWTSTAMP_FILTER_NONE) |
1012 (1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC) |
1013 (1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ);
1014 return 0;
1015 }
1016
1017 static const struct ethtool_ops ixp4xx_ethtool_ops = {
1018 .get_drvinfo = ixp4xx_get_drvinfo,
1019 .nway_reset = phy_ethtool_nway_reset,
1020 .get_link = ethtool_op_get_link,
1021 .get_ts_info = ixp4xx_get_ts_info,
1022 .get_link_ksettings = phy_ethtool_get_link_ksettings,
1023 .set_link_ksettings = phy_ethtool_set_link_ksettings,
1024 };
1025
1026
1027 static int request_queues(struct port *port)
1028 {
1029 int err;
1030
1031 err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0,
1032 "%s:RX-free", port->netdev->name);
1033 if (err)
1034 return err;
1035
1036 err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0,
1037 "%s:RX", port->netdev->name);
1038 if (err)
1039 goto rel_rxfree;
1040
1041 err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0,
1042 "%s:TX", port->netdev->name);
1043 if (err)
1044 goto rel_rx;
1045
1046 err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0,
1047 "%s:TX-ready", port->netdev->name);
1048 if (err)
1049 goto rel_tx;
1050
1051 /* TX-done queue handles skbs sent out by the NPEs */
1052 if (!ports_open) {
1053 err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0,
1054 "%s:TX-done", DRV_NAME);
1055 if (err)
1056 goto rel_txready;
1057 }
1058 return 0;
1059
1060 rel_txready:
1061 qmgr_release_queue(port->plat->txreadyq);
1062 rel_tx:
1063 qmgr_release_queue(TX_QUEUE(port->id));
1064 rel_rx:
1065 qmgr_release_queue(port->plat->rxq);
1066 rel_rxfree:
1067 qmgr_release_queue(RXFREE_QUEUE(port->id));
1068 printk(KERN_DEBUG "%s: unable to request hardware queues\n",
1069 port->netdev->name);
1070 return err;
1071 }
1072
1073 static void release_queues(struct port *port)
1074 {
1075 qmgr_release_queue(RXFREE_QUEUE(port->id));
1076 qmgr_release_queue(port->plat->rxq);
1077 qmgr_release_queue(TX_QUEUE(port->id));
1078 qmgr_release_queue(port->plat->txreadyq);
1079
1080 if (!ports_open)
1081 qmgr_release_queue(TXDONE_QUEUE);
1082 }
1083
1084 static int init_queues(struct port *port)
1085 {
1086 int i;
1087
1088 if (!ports_open) {
1089 dma_pool = dma_pool_create(DRV_NAME, port->netdev->dev.parent,
1090 POOL_ALLOC_SIZE, 32, 0);
1091 if (!dma_pool)
1092 return -ENOMEM;
1093 }
1094
1095 if (!(port->desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL,
1096 &port->desc_tab_phys)))
1097 return -ENOMEM;
1098 memset(port->desc_tab, 0, POOL_ALLOC_SIZE);
1099 memset(port->rx_buff_tab, 0, sizeof(port->rx_buff_tab)); /* tables */
1100 memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab));
1101
1102 /* Setup RX buffers */
1103 for (i = 0; i < RX_DESCS; i++) {
1104 struct desc *desc = rx_desc_ptr(port, i);
1105 buffer_t *buff; /* skb or kmalloc()ated memory */
1106 void *data;
1107 #ifdef __ARMEB__
1108 if (!(buff = netdev_alloc_skb(port->netdev, RX_BUFF_SIZE)))
1109 return -ENOMEM;
1110 data = buff->data;
1111 #else
1112 if (!(buff = kmalloc(RX_BUFF_SIZE, GFP_KERNEL)))
1113 return -ENOMEM;
1114 data = buff;
1115 #endif
1116 desc->buf_len = MAX_MRU;
1117 desc->data = dma_map_single(&port->netdev->dev, data,
1118 RX_BUFF_SIZE, DMA_FROM_DEVICE);
1119 if (dma_mapping_error(&port->netdev->dev, desc->data)) {
1120 free_buffer(buff);
1121 return -EIO;
1122 }
1123 desc->data += NET_IP_ALIGN;
1124 port->rx_buff_tab[i] = buff;
1125 }
1126
1127 return 0;
1128 }
1129
1130 static void destroy_queues(struct port *port)
1131 {
1132 int i;
1133
1134 if (port->desc_tab) {
1135 for (i = 0; i < RX_DESCS; i++) {
1136 struct desc *desc = rx_desc_ptr(port, i);
1137 buffer_t *buff = port->rx_buff_tab[i];
1138 if (buff) {
1139 dma_unmap_single(&port->netdev->dev,
1140 desc->data - NET_IP_ALIGN,
1141 RX_BUFF_SIZE, DMA_FROM_DEVICE);
1142 free_buffer(buff);
1143 }
1144 }
1145 for (i = 0; i < TX_DESCS; i++) {
1146 struct desc *desc = tx_desc_ptr(port, i);
1147 buffer_t *buff = port->tx_buff_tab[i];
1148 if (buff) {
1149 dma_unmap_tx(port, desc);
1150 free_buffer(buff);
1151 }
1152 }
1153 dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys);
1154 port->desc_tab = NULL;
1155 }
1156
1157 if (!ports_open && dma_pool) {
1158 dma_pool_destroy(dma_pool);
1159 dma_pool = NULL;
1160 }
1161 }
1162
1163 static int eth_open(struct net_device *dev)
1164 {
1165 struct port *port = netdev_priv(dev);
1166 struct npe *npe = port->npe;
1167 struct msg msg;
1168 int i, err;
1169
1170 if (!npe_running(npe)) {
1171 err = npe_load_firmware(npe, npe_name(npe), &dev->dev);
1172 if (err)
1173 return err;
1174
1175 if (npe_recv_message(npe, &msg, "ETH_GET_STATUS")) {
1176 netdev_err(dev, "%s not responding\n", npe_name(npe));
1177 return -EIO;
1178 }
1179 port->firmware[0] = msg.byte4;
1180 port->firmware[1] = msg.byte5;
1181 port->firmware[2] = msg.byte6;
1182 port->firmware[3] = msg.byte7;
1183 }
1184
1185 memset(&msg, 0, sizeof(msg));
1186 msg.cmd = NPE_VLAN_SETRXQOSENTRY;
1187 msg.eth_id = port->id;
1188 msg.byte5 = port->plat->rxq | 0x80;
1189 msg.byte7 = port->plat->rxq << 4;
1190 for (i = 0; i < 8; i++) {
1191 msg.byte3 = i;
1192 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_RXQ"))
1193 return -EIO;
1194 }
1195
1196 msg.cmd = NPE_EDB_SETPORTADDRESS;
1197 msg.eth_id = PHYSICAL_ID(port->id);
1198 msg.byte2 = dev->dev_addr[0];
1199 msg.byte3 = dev->dev_addr[1];
1200 msg.byte4 = dev->dev_addr[2];
1201 msg.byte5 = dev->dev_addr[3];
1202 msg.byte6 = dev->dev_addr[4];
1203 msg.byte7 = dev->dev_addr[5];
1204 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAC"))
1205 return -EIO;
1206
1207 memset(&msg, 0, sizeof(msg));
1208 msg.cmd = NPE_FW_SETFIREWALLMODE;
1209 msg.eth_id = port->id;
1210 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
1211 return -EIO;
1212
1213 if ((err = request_queues(port)) != 0)
1214 return err;
1215
1216 if ((err = init_queues(port)) != 0) {
1217 destroy_queues(port);
1218 release_queues(port);
1219 return err;
1220 }
1221
1222 port->speed = 0; /* force "link up" message */
1223 phy_start(dev->phydev);
1224
1225 for (i = 0; i < ETH_ALEN; i++)
1226 __raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]);
1227 __raw_writel(0x08, &port->regs->random_seed);
1228 __raw_writel(0x12, &port->regs->partial_empty_threshold);
1229 __raw_writel(0x30, &port->regs->partial_full_threshold);
1230 __raw_writel(0x08, &port->regs->tx_start_bytes);
1231 __raw_writel(0x15, &port->regs->tx_deferral);
1232 __raw_writel(0x08, &port->regs->tx_2part_deferral[0]);
1233 __raw_writel(0x07, &port->regs->tx_2part_deferral[1]);
1234 __raw_writel(0x80, &port->regs->slot_time);
1235 __raw_writel(0x01, &port->regs->int_clock_threshold);
1236
1237 /* Populate queues with buffers, no failure after this point */
1238 for (i = 0; i < TX_DESCS; i++)
1239 queue_put_desc(port->plat->txreadyq,
1240 tx_desc_phys(port, i), tx_desc_ptr(port, i));
1241
1242 for (i = 0; i < RX_DESCS; i++)
1243 queue_put_desc(RXFREE_QUEUE(port->id),
1244 rx_desc_phys(port, i), rx_desc_ptr(port, i));
1245
1246 __raw_writel(TX_CNTRL1_RETRIES, &port->regs->tx_control[1]);
1247 __raw_writel(DEFAULT_TX_CNTRL0, &port->regs->tx_control[0]);
1248 __raw_writel(0, &port->regs->rx_control[1]);
1249 __raw_writel(DEFAULT_RX_CNTRL0, &port->regs->rx_control[0]);
1250
1251 napi_enable(&port->napi);
1252 eth_set_mcast_list(dev);
1253 netif_start_queue(dev);
1254
1255 qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
1256 eth_rx_irq, dev);
1257 if (!ports_open) {
1258 qmgr_set_irq(TXDONE_QUEUE, QUEUE_IRQ_SRC_NOT_EMPTY,
1259 eth_txdone_irq, NULL);
1260 qmgr_enable_irq(TXDONE_QUEUE);
1261 }
1262 ports_open++;
1263 /* we may already have RX data, enables IRQ */
1264 napi_schedule(&port->napi);
1265 return 0;
1266 }
1267
1268 static int eth_close(struct net_device *dev)
1269 {
1270 struct port *port = netdev_priv(dev);
1271 struct msg msg;
1272 int buffs = RX_DESCS; /* allocated RX buffers */
1273 int i;
1274
1275 ports_open--;
1276 qmgr_disable_irq(port->plat->rxq);
1277 napi_disable(&port->napi);
1278 netif_stop_queue(dev);
1279
1280 while (queue_get_desc(RXFREE_QUEUE(port->id), port, 0) >= 0)
1281 buffs--;
1282
1283 memset(&msg, 0, sizeof(msg));
1284 msg.cmd = NPE_SETLOOPBACK_MODE;
1285 msg.eth_id = port->id;
1286 msg.byte3 = 1;
1287 if (npe_send_recv_message(port->npe, &msg, "ETH_ENABLE_LOOPBACK"))
1288 netdev_crit(dev, "unable to enable loopback\n");
1289
1290 i = 0;
1291 do { /* drain RX buffers */
1292 while (queue_get_desc(port->plat->rxq, port, 0) >= 0)
1293 buffs--;
1294 if (!buffs)
1295 break;
1296 if (qmgr_stat_empty(TX_QUEUE(port->id))) {
1297 /* we have to inject some packet */
1298 struct desc *desc;
1299 u32 phys;
1300 int n = queue_get_desc(port->plat->txreadyq, port, 1);
1301 BUG_ON(n < 0);
1302 desc = tx_desc_ptr(port, n);
1303 phys = tx_desc_phys(port, n);
1304 desc->buf_len = desc->pkt_len = 1;
1305 wmb();
1306 queue_put_desc(TX_QUEUE(port->id), phys, desc);
1307 }
1308 udelay(1);
1309 } while (++i < MAX_CLOSE_WAIT);
1310
1311 if (buffs)
1312 netdev_crit(dev, "unable to drain RX queue, %i buffer(s)"
1313 " left in NPE\n", buffs);
1314 #if DEBUG_CLOSE
1315 if (!buffs)
1316 netdev_debug(dev, "draining RX queue took %i cycles\n", i);
1317 #endif
1318
1319 buffs = TX_DESCS;
1320 while (queue_get_desc(TX_QUEUE(port->id), port, 1) >= 0)
1321 buffs--; /* cancel TX */
1322
1323 i = 0;
1324 do {
1325 while (queue_get_desc(port->plat->txreadyq, port, 1) >= 0)
1326 buffs--;
1327 if (!buffs)
1328 break;
1329 } while (++i < MAX_CLOSE_WAIT);
1330
1331 if (buffs)
1332 netdev_crit(dev, "unable to drain TX queue, %i buffer(s) "
1333 "left in NPE\n", buffs);
1334 #if DEBUG_CLOSE
1335 if (!buffs)
1336 netdev_debug(dev, "draining TX queues took %i cycles\n", i);
1337 #endif
1338
1339 msg.byte3 = 0;
1340 if (npe_send_recv_message(port->npe, &msg, "ETH_DISABLE_LOOPBACK"))
1341 netdev_crit(dev, "unable to disable loopback\n");
1342
1343 phy_stop(dev->phydev);
1344
1345 if (!ports_open)
1346 qmgr_disable_irq(TXDONE_QUEUE);
1347 destroy_queues(port);
1348 release_queues(port);
1349 return 0;
1350 }
1351
1352 static const struct net_device_ops ixp4xx_netdev_ops = {
1353 .ndo_open = eth_open,
1354 .ndo_stop = eth_close,
1355 .ndo_start_xmit = eth_xmit,
1356 .ndo_set_rx_mode = eth_set_mcast_list,
1357 .ndo_do_ioctl = eth_ioctl,
1358 .ndo_set_mac_address = eth_mac_addr,
1359 .ndo_validate_addr = eth_validate_addr,
1360 };
1361
1362 static int ixp4xx_eth_probe(struct platform_device *pdev)
1363 {
1364 char phy_id[MII_BUS_ID_SIZE + 3];
1365 struct phy_device *phydev = NULL;
1366 struct device *dev = &pdev->dev;
1367 struct eth_plat_info *plat;
1368 resource_size_t regs_phys;
1369 struct net_device *ndev;
1370 struct resource *res;
1371 struct port *port;
1372 int err;
1373
1374 plat = dev_get_platdata(dev);
1375
1376 if (!(ndev = devm_alloc_etherdev(dev, sizeof(struct port))))
1377 return -ENOMEM;
1378
1379 SET_NETDEV_DEV(ndev, dev);
1380 port = netdev_priv(ndev);
1381 port->netdev = ndev;
1382 port->id = pdev->id;
1383
1384 /* Get the port resource and remap */
1385 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1386 if (!res)
1387 return -ENODEV;
1388 regs_phys = res->start;
1389 port->regs = devm_ioremap_resource(dev, res);
1390
1391 switch (port->id) {
1392 case IXP4XX_ETH_NPEA:
1393 /* If the MDIO bus is not up yet, defer probe */
1394 if (!mdio_bus)
1395 return -EPROBE_DEFER;
1396 break;
1397 case IXP4XX_ETH_NPEB:
1398 /*
1399 * On all except IXP43x, NPE-B is used for the MDIO bus.
1400 * If there is no NPE-B in the feature set, bail out, else
1401 * register the MDIO bus.
1402 */
1403 if (!cpu_is_ixp43x()) {
1404 if (!(ixp4xx_read_feature_bits() &
1405 IXP4XX_FEATURE_NPEB_ETH0))
1406 return -ENODEV;
1407 /* Else register the MDIO bus on NPE-B */
1408 if ((err = ixp4xx_mdio_register(port->regs)))
1409 return err;
1410 }
1411 if (!mdio_bus)
1412 return -EPROBE_DEFER;
1413 break;
1414 case IXP4XX_ETH_NPEC:
1415 /*
1416 * IXP43x lacks NPE-B and uses NPE-C for the MDIO bus access,
1417 * of there is no NPE-C, no bus, nothing works, so bail out.
1418 */
1419 if (cpu_is_ixp43x()) {
1420 if (!(ixp4xx_read_feature_bits() &
1421 IXP4XX_FEATURE_NPEC_ETH))
1422 return -ENODEV;
1423 /* Else register the MDIO bus on NPE-C */
1424 if ((err = ixp4xx_mdio_register(port->regs)))
1425 return err;
1426 }
1427 if (!mdio_bus)
1428 return -EPROBE_DEFER;
1429 break;
1430 default:
1431 return -ENODEV;
1432 }
1433
1434 ndev->netdev_ops = &ixp4xx_netdev_ops;
1435 ndev->ethtool_ops = &ixp4xx_ethtool_ops;
1436 ndev->tx_queue_len = 100;
1437
1438 netif_napi_add(ndev, &port->napi, eth_poll, NAPI_WEIGHT);
1439
1440 if (!(port->npe = npe_request(NPE_ID(port->id))))
1441 return -EIO;
1442
1443 port->mem_res = request_mem_region(regs_phys, REGS_SIZE, ndev->name);
1444 if (!port->mem_res) {
1445 err = -EBUSY;
1446 goto err_npe_rel;
1447 }
1448
1449 port->plat = plat;
1450 npe_port_tab[NPE_ID(port->id)] = port;
1451 memcpy(ndev->dev_addr, plat->hwaddr, ETH_ALEN);
1452
1453 platform_set_drvdata(pdev, ndev);
1454
1455 __raw_writel(DEFAULT_CORE_CNTRL | CORE_RESET,
1456 &port->regs->core_control);
1457 udelay(50);
1458 __raw_writel(DEFAULT_CORE_CNTRL, &port->regs->core_control);
1459 udelay(50);
1460
1461 snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT,
1462 mdio_bus->id, plat->phy);
1463 phydev = phy_connect(ndev, phy_id, &ixp4xx_adjust_link,
1464 PHY_INTERFACE_MODE_MII);
1465 if (IS_ERR(phydev)) {
1466 err = PTR_ERR(phydev);
1467 goto err_free_mem;
1468 }
1469
1470 phydev->irq = PHY_POLL;
1471
1472 if ((err = register_netdev(ndev)))
1473 goto err_phy_dis;
1474
1475 netdev_info(ndev, "%s: MII PHY %i on %s\n", ndev->name, plat->phy,
1476 npe_name(port->npe));
1477
1478 return 0;
1479
1480 err_phy_dis:
1481 phy_disconnect(phydev);
1482 err_free_mem:
1483 npe_port_tab[NPE_ID(port->id)] = NULL;
1484 release_resource(port->mem_res);
1485 err_npe_rel:
1486 npe_release(port->npe);
1487 return err;
1488 }
1489
1490 static int ixp4xx_eth_remove(struct platform_device *pdev)
1491 {
1492 struct net_device *ndev = platform_get_drvdata(pdev);
1493 struct phy_device *phydev = ndev->phydev;
1494 struct port *port = netdev_priv(ndev);
1495
1496 unregister_netdev(ndev);
1497 phy_disconnect(phydev);
1498 ixp4xx_mdio_remove();
1499 npe_port_tab[NPE_ID(port->id)] = NULL;
1500 npe_release(port->npe);
1501 release_resource(port->mem_res);
1502 return 0;
1503 }
1504
1505 static struct platform_driver ixp4xx_eth_driver = {
1506 .driver.name = DRV_NAME,
1507 .probe = ixp4xx_eth_probe,
1508 .remove = ixp4xx_eth_remove,
1509 };
1510 module_platform_driver(ixp4xx_eth_driver);
1511
1512 MODULE_AUTHOR("Krzysztof Halasa");
1513 MODULE_DESCRIPTION("Intel IXP4xx Ethernet driver");
1514 MODULE_LICENSE("GPL v2");
1515 MODULE_ALIAS("platform:ixp4xx_eth");
Linux with added FPC-III support