blob: 2659daad783ddb857f5e9597bbb2a2ea95c05f04 [file] [log] [blame]
Kumar Gala0bbaf062005-06-20 10:54:21 -05001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * drivers/net/gianfar.c
3 *
4 * Gianfar Ethernet Driver
Andy Fleming7f7f5312005-11-11 12:38:59 -06005 * This driver is designed for the non-CPM ethernet controllers
6 * on the 85xx and 83xx family of integrated processors
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * Based on 8260_io/fcc_enet.c
8 *
9 * Author: Andy Fleming
Kumar Gala4c8d3d92005-11-13 16:06:30 -080010 * Maintainer: Kumar Gala
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +000011 * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 *
Wu Jiajun-B063786c43e042011-06-07 21:46:51 +000013 * Copyright 2002-2009, 2011 Freescale Semiconductor, Inc.
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +000014 * Copyright 2007 MontaVista Software, Inc.
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 *
16 * This program is free software; you can redistribute it and/or modify it
17 * under the terms of the GNU General Public License as published by the
18 * Free Software Foundation; either version 2 of the License, or (at your
19 * option) any later version.
20 *
21 * Gianfar: AKA Lambda Draconis, "Dragon"
22 * RA 11 31 24.2
23 * Dec +69 19 52
24 * V 3.84
25 * B-V +1.62
26 *
27 * Theory of operation
Kumar Gala0bbaf062005-06-20 10:54:21 -050028 *
Andy Flemingb31a1d82008-12-16 15:29:15 -080029 * The driver is initialized through of_device. Configuration information
30 * is therefore conveyed through an OF-style device tree.
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 *
32 * The Gianfar Ethernet Controller uses a ring of buffer
33 * descriptors. The beginning is indicated by a register
Kumar Gala0bbaf062005-06-20 10:54:21 -050034 * pointing to the physical address of the start of the ring.
35 * The end is determined by a "wrap" bit being set in the
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 * last descriptor of the ring.
37 *
38 * When a packet is received, the RXF bit in the
Kumar Gala0bbaf062005-06-20 10:54:21 -050039 * IEVENT register is set, triggering an interrupt when the
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 * corresponding bit in the IMASK register is also set (if
41 * interrupt coalescing is active, then the interrupt may not
42 * happen immediately, but will wait until either a set number
Andy Flemingbb40dcb2005-09-23 22:54:21 -040043 * of frames or amount of time have passed). In NAPI, the
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 * interrupt handler will signal there is work to be done, and
Francois Romieu0aa15382008-07-11 00:33:52 +020045 * exit. This method will start at the last known empty
Kumar Gala0bbaf062005-06-20 10:54:21 -050046 * descriptor, and process every subsequent descriptor until there
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 * are none left with data (NAPI will stop after a set number of
48 * packets to give time to other tasks, but will eventually
49 * process all the packets). The data arrives inside a
50 * pre-allocated skb, and so after the skb is passed up to the
51 * stack, a new skb must be allocated, and the address field in
52 * the buffer descriptor must be updated to indicate this new
53 * skb.
54 *
55 * When the kernel requests that a packet be transmitted, the
56 * driver starts where it left off last time, and points the
57 * descriptor at the buffer which was passed in. The driver
58 * then informs the DMA engine that there are packets ready to
59 * be transmitted. Once the controller is finished transmitting
60 * the packet, an interrupt may be triggered (under the same
61 * conditions as for reception, but depending on the TXF bit).
62 * The driver then cleans up the buffer.
63 */
64
Joe Perches59deab22011-06-14 08:57:47 +000065#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
66#define DEBUG
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#include <linux/string.h>
70#include <linux/errno.h>
Andy Flemingbb40dcb2005-09-23 22:54:21 -040071#include <linux/unistd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#include <linux/slab.h>
73#include <linux/interrupt.h>
74#include <linux/init.h>
75#include <linux/delay.h>
76#include <linux/netdevice.h>
77#include <linux/etherdevice.h>
78#include <linux/skbuff.h>
Kumar Gala0bbaf062005-06-20 10:54:21 -050079#include <linux/if_vlan.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070080#include <linux/spinlock.h>
81#include <linux/mm.h>
Grant Likelyfe192a42009-04-25 12:53:12 +000082#include <linux/of_mdio.h>
Andy Flemingb31a1d82008-12-16 15:29:15 -080083#include <linux/of_platform.h>
Kumar Gala0bbaf062005-06-20 10:54:21 -050084#include <linux/ip.h>
85#include <linux/tcp.h>
86#include <linux/udp.h>
Kumar Gala9c07b8842006-01-11 11:26:25 -080087#include <linux/in.h>
Manfred Rudigiercc772ab2010-04-08 23:10:03 +000088#include <linux/net_tstamp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
90#include <asm/io.h>
Anton Vorontsov7d350972010-06-30 06:39:12 +000091#include <asm/reg.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070092#include <asm/irq.h>
93#include <asm/uaccess.h>
94#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070095#include <linux/dma-mapping.h>
96#include <linux/crc32.h>
Andy Flemingbb40dcb2005-09-23 22:54:21 -040097#include <linux/mii.h>
98#include <linux/phy.h>
Andy Flemingb31a1d82008-12-16 15:29:15 -080099#include <linux/phy_fixed.h>
100#include <linux/of.h>
David Daney4b6ba8a2010-10-26 15:07:13 -0700101#include <linux/of_net.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
103#include "gianfar.h"
Andy Fleming1577ece2009-02-04 16:42:12 -0800104#include "fsl_pq_mdio.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
106#define TX_TIMEOUT (1*HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107#undef BRIEF_GFAR_ERRORS
108#undef VERBOSE_GFAR_ERRORS
109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110const char gfar_driver_name[] = "Gianfar Ethernet";
Andy Fleming7f7f5312005-11-11 12:38:59 -0600111const char gfar_driver_version[] = "1.3";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113static int gfar_enet_open(struct net_device *dev);
114static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev);
Sebastian Siewiorab939902008-08-19 21:12:45 +0200115static void gfar_reset_task(struct work_struct *work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116static void gfar_timeout(struct net_device *dev);
117static int gfar_close(struct net_device *dev);
Andy Fleming815b97c2008-04-22 17:18:29 -0500118struct sk_buff *gfar_new_skb(struct net_device *dev);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000119static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
Andy Fleming815b97c2008-04-22 17:18:29 -0500120 struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121static int gfar_set_mac_address(struct net_device *dev);
122static int gfar_change_mtu(struct net_device *dev, int new_mtu);
David Howells7d12e782006-10-05 14:55:46 +0100123static irqreturn_t gfar_error(int irq, void *dev_id);
124static irqreturn_t gfar_transmit(int irq, void *dev_id);
125static irqreturn_t gfar_interrupt(int irq, void *dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126static void adjust_link(struct net_device *dev);
127static void init_registers(struct net_device *dev);
128static int init_phy(struct net_device *dev);
Grant Likely74888762011-02-22 21:05:51 -0700129static int gfar_probe(struct platform_device *ofdev);
Grant Likely2dc11582010-08-06 09:25:50 -0600130static int gfar_remove(struct platform_device *ofdev);
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400131static void free_skb_resources(struct gfar_private *priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132static void gfar_set_multi(struct net_device *dev);
133static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr);
Kapil Junejad3c12872007-05-11 18:25:11 -0500134static void gfar_configure_serdes(struct net_device *dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700135static int gfar_poll(struct napi_struct *napi, int budget);
Vitaly Woolf2d71c22006-11-07 13:27:02 +0300136#ifdef CONFIG_NET_POLL_CONTROLLER
137static void gfar_netpoll(struct net_device *dev);
138#endif
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000139int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit);
140static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue);
Dai Haruki2c2db482008-12-16 15:31:15 -0800141static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
142 int amount_pull);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600143void gfar_halt(struct net_device *dev);
Scott Woodd87eb122008-07-11 18:04:45 -0500144static void gfar_halt_nodisable(struct net_device *dev);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600145void gfar_start(struct net_device *dev);
146static void gfar_clear_exact_match(struct net_device *dev);
Joe Perchesb6bc7652010-12-21 02:16:08 -0800147static void gfar_set_mac_for_addr(struct net_device *dev, int num,
148 const u8 *addr);
Andy Fleming26ccfc32009-03-10 12:58:28 +0000149static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151MODULE_AUTHOR("Freescale Semiconductor, Inc");
152MODULE_DESCRIPTION("Gianfar Ethernet Driver");
153MODULE_LICENSE("GPL");
154
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000155static void gfar_init_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
Anton Vorontsov8a102fe2009-10-12 06:00:37 +0000156 dma_addr_t buf)
157{
Anton Vorontsov8a102fe2009-10-12 06:00:37 +0000158 u32 lstatus;
159
160 bdp->bufPtr = buf;
161
162 lstatus = BD_LFLAG(RXBD_EMPTY | RXBD_INTERRUPT);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000163 if (bdp == rx_queue->rx_bd_base + rx_queue->rx_ring_size - 1)
Anton Vorontsov8a102fe2009-10-12 06:00:37 +0000164 lstatus |= BD_LFLAG(RXBD_WRAP);
165
166 eieio();
167
168 bdp->lstatus = lstatus;
169}
170
Anton Vorontsov87283272009-10-12 06:00:39 +0000171static int gfar_init_bds(struct net_device *ndev)
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000172{
Anton Vorontsov87283272009-10-12 06:00:39 +0000173 struct gfar_private *priv = netdev_priv(ndev);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000174 struct gfar_priv_tx_q *tx_queue = NULL;
175 struct gfar_priv_rx_q *rx_queue = NULL;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000176 struct txbd8 *txbdp;
177 struct rxbd8 *rxbdp;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000178 int i, j;
Anton Vorontsov87283272009-10-12 06:00:39 +0000179
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000180 for (i = 0; i < priv->num_tx_queues; i++) {
181 tx_queue = priv->tx_queue[i];
182 /* Initialize some variables in our dev structure */
183 tx_queue->num_txbdfree = tx_queue->tx_ring_size;
184 tx_queue->dirty_tx = tx_queue->tx_bd_base;
185 tx_queue->cur_tx = tx_queue->tx_bd_base;
186 tx_queue->skb_curtx = 0;
187 tx_queue->skb_dirtytx = 0;
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000188
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000189 /* Initialize Transmit Descriptor Ring */
190 txbdp = tx_queue->tx_bd_base;
191 for (j = 0; j < tx_queue->tx_ring_size; j++) {
192 txbdp->lstatus = 0;
193 txbdp->bufPtr = 0;
194 txbdp++;
Anton Vorontsov87283272009-10-12 06:00:39 +0000195 }
196
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000197 /* Set the last descriptor in the ring to indicate wrap */
198 txbdp--;
199 txbdp->status |= TXBD_WRAP;
200 }
201
202 for (i = 0; i < priv->num_rx_queues; i++) {
203 rx_queue = priv->rx_queue[i];
204 rx_queue->cur_rx = rx_queue->rx_bd_base;
205 rx_queue->skb_currx = 0;
206 rxbdp = rx_queue->rx_bd_base;
207
208 for (j = 0; j < rx_queue->rx_ring_size; j++) {
209 struct sk_buff *skb = rx_queue->rx_skbuff[j];
210
211 if (skb) {
212 gfar_init_rxbdp(rx_queue, rxbdp,
213 rxbdp->bufPtr);
214 } else {
215 skb = gfar_new_skb(ndev);
216 if (!skb) {
Joe Perches59deab22011-06-14 08:57:47 +0000217 netdev_err(ndev, "Can't allocate RX buffers\n");
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000218 goto err_rxalloc_fail;
219 }
220 rx_queue->rx_skbuff[j] = skb;
221
222 gfar_new_rxbdp(rx_queue, rxbdp, skb);
223 }
224
225 rxbdp++;
226 }
227
Anton Vorontsov87283272009-10-12 06:00:39 +0000228 }
229
230 return 0;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000231
232err_rxalloc_fail:
233 free_skb_resources(priv);
234 return -ENOMEM;
Anton Vorontsov87283272009-10-12 06:00:39 +0000235}
236
237static int gfar_alloc_skb_resources(struct net_device *ndev)
238{
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000239 void *vaddr;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000240 dma_addr_t addr;
241 int i, j, k;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000242 struct gfar_private *priv = netdev_priv(ndev);
243 struct device *dev = &priv->ofdev->dev;
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000244 struct gfar_priv_tx_q *tx_queue = NULL;
245 struct gfar_priv_rx_q *rx_queue = NULL;
246
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000247 priv->total_tx_ring_size = 0;
248 for (i = 0; i < priv->num_tx_queues; i++)
249 priv->total_tx_ring_size += priv->tx_queue[i]->tx_ring_size;
250
251 priv->total_rx_ring_size = 0;
252 for (i = 0; i < priv->num_rx_queues; i++)
253 priv->total_rx_ring_size += priv->rx_queue[i]->rx_ring_size;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000254
255 /* Allocate memory for the buffer descriptors */
Anton Vorontsov87283272009-10-12 06:00:39 +0000256 vaddr = dma_alloc_coherent(dev,
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000257 sizeof(struct txbd8) * priv->total_tx_ring_size +
258 sizeof(struct rxbd8) * priv->total_rx_ring_size,
259 &addr, GFP_KERNEL);
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000260 if (!vaddr) {
Joe Perches59deab22011-06-14 08:57:47 +0000261 netif_err(priv, ifup, ndev,
262 "Could not allocate buffer descriptors!\n");
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000263 return -ENOMEM;
264 }
265
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000266 for (i = 0; i < priv->num_tx_queues; i++) {
267 tx_queue = priv->tx_queue[i];
Joe Perches43d620c2011-06-16 19:08:06 +0000268 tx_queue->tx_bd_base = vaddr;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000269 tx_queue->tx_bd_dma_base = addr;
270 tx_queue->dev = ndev;
271 /* enet DMA only understands physical addresses */
272 addr += sizeof(struct txbd8) *tx_queue->tx_ring_size;
273 vaddr += sizeof(struct txbd8) *tx_queue->tx_ring_size;
274 }
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000275
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000276 /* Start the rx descriptor ring where the tx ring leaves off */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000277 for (i = 0; i < priv->num_rx_queues; i++) {
278 rx_queue = priv->rx_queue[i];
Joe Perches43d620c2011-06-16 19:08:06 +0000279 rx_queue->rx_bd_base = vaddr;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000280 rx_queue->rx_bd_dma_base = addr;
281 rx_queue->dev = ndev;
282 addr += sizeof (struct rxbd8) * rx_queue->rx_ring_size;
283 vaddr += sizeof (struct rxbd8) * rx_queue->rx_ring_size;
284 }
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000285
286 /* Setup the skbuff rings */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000287 for (i = 0; i < priv->num_tx_queues; i++) {
288 tx_queue = priv->tx_queue[i];
289 tx_queue->tx_skbuff = kmalloc(sizeof(*tx_queue->tx_skbuff) *
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000290 tx_queue->tx_ring_size, GFP_KERNEL);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000291 if (!tx_queue->tx_skbuff) {
Joe Perches59deab22011-06-14 08:57:47 +0000292 netif_err(priv, ifup, ndev,
293 "Could not allocate tx_skbuff\n");
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000294 goto cleanup;
295 }
296
297 for (k = 0; k < tx_queue->tx_ring_size; k++)
298 tx_queue->tx_skbuff[k] = NULL;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000299 }
300
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000301 for (i = 0; i < priv->num_rx_queues; i++) {
302 rx_queue = priv->rx_queue[i];
303 rx_queue->rx_skbuff = kmalloc(sizeof(*rx_queue->rx_skbuff) *
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000304 rx_queue->rx_ring_size, GFP_KERNEL);
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000305
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000306 if (!rx_queue->rx_skbuff) {
Joe Perches59deab22011-06-14 08:57:47 +0000307 netif_err(priv, ifup, ndev,
308 "Could not allocate rx_skbuff\n");
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000309 goto cleanup;
310 }
311
312 for (j = 0; j < rx_queue->rx_ring_size; j++)
313 rx_queue->rx_skbuff[j] = NULL;
314 }
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000315
Anton Vorontsov87283272009-10-12 06:00:39 +0000316 if (gfar_init_bds(ndev))
317 goto cleanup;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000318
319 return 0;
320
321cleanup:
322 free_skb_resources(priv);
323 return -ENOMEM;
324}
325
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000326static void gfar_init_tx_rx_base(struct gfar_private *priv)
327{
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000328 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Anton Vorontsov18294ad2009-11-04 12:53:00 +0000329 u32 __iomem *baddr;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000330 int i;
331
332 baddr = &regs->tbase0;
333 for(i = 0; i < priv->num_tx_queues; i++) {
334 gfar_write(baddr, priv->tx_queue[i]->tx_bd_dma_base);
335 baddr += 2;
336 }
337
338 baddr = &regs->rbase0;
339 for(i = 0; i < priv->num_rx_queues; i++) {
340 gfar_write(baddr, priv->rx_queue[i]->rx_bd_dma_base);
341 baddr += 2;
342 }
343}
344
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000345static void gfar_init_mac(struct net_device *ndev)
346{
347 struct gfar_private *priv = netdev_priv(ndev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000348 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000349 u32 rctrl = 0;
350 u32 tctrl = 0;
351 u32 attrs = 0;
352
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000353 /* write the tx/rx base registers */
354 gfar_init_tx_rx_base(priv);
Anton Vorontsov32c513b2009-10-12 06:00:36 +0000355
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000356 /* Configure the coalescing support */
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000357 gfar_configure_coalescing(priv, 0xFF, 0xFF);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000358
Sandeep Gopalpet1ccb8382009-12-16 01:14:58 +0000359 if (priv->rx_filer_enable) {
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000360 rctrl |= RCTRL_FILREN;
Sandeep Gopalpet1ccb8382009-12-16 01:14:58 +0000361 /* Program the RIR0 reg with the required distribution */
362 gfar_write(&regs->rir0, DEFAULT_RIR0);
363 }
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000364
Michał Mirosław8b3afe92011-04-15 04:50:50 +0000365 if (ndev->features & NETIF_F_RXCSUM)
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000366 rctrl |= RCTRL_CHECKSUMMING;
367
368 if (priv->extended_hash) {
369 rctrl |= RCTRL_EXTHASH;
370
371 gfar_clear_exact_match(ndev);
372 rctrl |= RCTRL_EMEN;
373 }
374
375 if (priv->padding) {
376 rctrl &= ~RCTRL_PAL_MASK;
377 rctrl |= RCTRL_PADDING(priv->padding);
378 }
379
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000380 /* Insert receive time stamps into padding alignment bytes */
381 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) {
382 rctrl &= ~RCTRL_PAL_MASK;
Manfred Rudigier97553f72010-06-11 01:49:05 +0000383 rctrl |= RCTRL_PADDING(8);
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000384 priv->padding = 8;
385 }
386
Manfred Rudigier97553f72010-06-11 01:49:05 +0000387 /* Enable HW time stamping if requested from user space */
388 if (priv->hwts_rx_en)
389 rctrl |= RCTRL_PRSDEP_INIT | RCTRL_TS_ENABLE;
390
Jiri Pirko87c288c2011-07-20 04:54:19 +0000391 if (ndev->features & NETIF_F_HW_VLAN_RX)
Sebastian Pöhnb852b722011-07-26 00:03:13 +0000392 rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT;
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000393
394 /* Init rctrl based on our settings */
395 gfar_write(&regs->rctrl, rctrl);
396
397 if (ndev->features & NETIF_F_IP_CSUM)
398 tctrl |= TCTRL_INIT_CSUM;
399
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000400 tctrl |= TCTRL_TXSCHED_PRIO;
401
Anton Vorontsov826aa4a2009-10-12 06:00:34 +0000402 gfar_write(&regs->tctrl, tctrl);
403
404 /* Set the extraction length and index */
405 attrs = ATTRELI_EL(priv->rx_stash_size) |
406 ATTRELI_EI(priv->rx_stash_index);
407
408 gfar_write(&regs->attreli, attrs);
409
410 /* Start with defaults, and add stashing or locking
411 * depending on the approprate variables */
412 attrs = ATTR_INIT_SETTINGS;
413
414 if (priv->bd_stash_en)
415 attrs |= ATTR_BDSTASH;
416
417 if (priv->rx_stash_size != 0)
418 attrs |= ATTR_BUFSTASH;
419
420 gfar_write(&regs->attr, attrs);
421
422 gfar_write(&regs->fifo_tx_thr, priv->fifo_threshold);
423 gfar_write(&regs->fifo_tx_starve, priv->fifo_starve);
424 gfar_write(&regs->fifo_tx_starve_shutoff, priv->fifo_starve_off);
425}
426
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +0000427static struct net_device_stats *gfar_get_stats(struct net_device *dev)
428{
429 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +0000430 unsigned long rx_packets = 0, rx_bytes = 0, rx_dropped = 0;
431 unsigned long tx_packets = 0, tx_bytes = 0;
432 int i = 0;
433
434 for (i = 0; i < priv->num_rx_queues; i++) {
435 rx_packets += priv->rx_queue[i]->stats.rx_packets;
436 rx_bytes += priv->rx_queue[i]->stats.rx_bytes;
437 rx_dropped += priv->rx_queue[i]->stats.rx_dropped;
438 }
439
440 dev->stats.rx_packets = rx_packets;
441 dev->stats.rx_bytes = rx_bytes;
442 dev->stats.rx_dropped = rx_dropped;
443
444 for (i = 0; i < priv->num_tx_queues; i++) {
Eric Dumazet1ac9ad12011-01-12 12:13:14 +0000445 tx_bytes += priv->tx_queue[i]->stats.tx_bytes;
446 tx_packets += priv->tx_queue[i]->stats.tx_packets;
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +0000447 }
448
449 dev->stats.tx_bytes = tx_bytes;
450 dev->stats.tx_packets = tx_packets;
451
452 return &dev->stats;
453}
454
Andy Fleming26ccfc32009-03-10 12:58:28 +0000455static const struct net_device_ops gfar_netdev_ops = {
456 .ndo_open = gfar_enet_open,
457 .ndo_start_xmit = gfar_start_xmit,
458 .ndo_stop = gfar_close,
459 .ndo_change_mtu = gfar_change_mtu,
Michał Mirosław8b3afe92011-04-15 04:50:50 +0000460 .ndo_set_features = gfar_set_features,
Andy Fleming26ccfc32009-03-10 12:58:28 +0000461 .ndo_set_multicast_list = gfar_set_multi,
462 .ndo_tx_timeout = gfar_timeout,
463 .ndo_do_ioctl = gfar_ioctl,
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +0000464 .ndo_get_stats = gfar_get_stats,
Ben Hutchings240c1022009-07-09 17:54:35 +0000465 .ndo_set_mac_address = eth_mac_addr,
466 .ndo_validate_addr = eth_validate_addr,
Andy Fleming26ccfc32009-03-10 12:58:28 +0000467#ifdef CONFIG_NET_POLL_CONTROLLER
468 .ndo_poll_controller = gfar_netpoll,
469#endif
470};
471
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000472void lock_rx_qs(struct gfar_private *priv)
473{
474 int i = 0x0;
475
476 for (i = 0; i < priv->num_rx_queues; i++)
477 spin_lock(&priv->rx_queue[i]->rxlock);
478}
479
480void lock_tx_qs(struct gfar_private *priv)
481{
482 int i = 0x0;
483
484 for (i = 0; i < priv->num_tx_queues; i++)
485 spin_lock(&priv->tx_queue[i]->txlock);
486}
487
488void unlock_rx_qs(struct gfar_private *priv)
489{
490 int i = 0x0;
491
492 for (i = 0; i < priv->num_rx_queues; i++)
493 spin_unlock(&priv->rx_queue[i]->rxlock);
494}
495
496void unlock_tx_qs(struct gfar_private *priv)
497{
498 int i = 0x0;
499
500 for (i = 0; i < priv->num_tx_queues; i++)
501 spin_unlock(&priv->tx_queue[i]->txlock);
502}
503
Jiri Pirko87c288c2011-07-20 04:54:19 +0000504static bool gfar_is_vlan_on(struct gfar_private *priv)
505{
506 return (priv->ndev->features & NETIF_F_HW_VLAN_RX) ||
507 (priv->ndev->features & NETIF_F_HW_VLAN_TX);
508}
509
Andy Fleming7f7f5312005-11-11 12:38:59 -0600510/* Returns 1 if incoming frames use an FCB */
511static inline int gfar_uses_fcb(struct gfar_private *priv)
Kumar Gala0bbaf062005-06-20 10:54:21 -0500512{
Jiri Pirko87c288c2011-07-20 04:54:19 +0000513 return gfar_is_vlan_on(priv) ||
514 (priv->ndev->features & NETIF_F_RXCSUM) ||
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000515 (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER);
Kumar Gala0bbaf062005-06-20 10:54:21 -0500516}
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400517
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000518static void free_tx_pointers(struct gfar_private *priv)
519{
520 int i = 0;
521
522 for (i = 0; i < priv->num_tx_queues; i++)
523 kfree(priv->tx_queue[i]);
524}
525
526static void free_rx_pointers(struct gfar_private *priv)
527{
528 int i = 0;
529
530 for (i = 0; i < priv->num_rx_queues; i++)
531 kfree(priv->rx_queue[i]);
532}
533
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000534static void unmap_group_regs(struct gfar_private *priv)
535{
536 int i = 0;
537
538 for (i = 0; i < MAXGROUPS; i++)
539 if (priv->gfargrp[i].regs)
540 iounmap(priv->gfargrp[i].regs);
541}
542
543static void disable_napi(struct gfar_private *priv)
544{
545 int i = 0;
546
547 for (i = 0; i < priv->num_grps; i++)
548 napi_disable(&priv->gfargrp[i].napi);
549}
550
551static void enable_napi(struct gfar_private *priv)
552{
553 int i = 0;
554
555 for (i = 0; i < priv->num_grps; i++)
556 napi_enable(&priv->gfargrp[i].napi);
557}
558
559static int gfar_parse_group(struct device_node *np,
560 struct gfar_private *priv, const char *model)
561{
562 u32 *queue_mask;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000563
Anton Vorontsov7ce97d42010-04-23 07:12:44 +0000564 priv->gfargrp[priv->num_grps].regs = of_iomap(np, 0);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000565 if (!priv->gfargrp[priv->num_grps].regs)
566 return -ENOMEM;
567
568 priv->gfargrp[priv->num_grps].interruptTransmit =
569 irq_of_parse_and_map(np, 0);
570
571 /* If we aren't the FEC we have multiple interrupts */
572 if (model && strcasecmp(model, "FEC")) {
573 priv->gfargrp[priv->num_grps].interruptReceive =
574 irq_of_parse_and_map(np, 1);
575 priv->gfargrp[priv->num_grps].interruptError =
576 irq_of_parse_and_map(np,2);
Nicolas Kaiser28cb6cc2010-11-15 10:59:42 +0000577 if (priv->gfargrp[priv->num_grps].interruptTransmit == NO_IRQ ||
578 priv->gfargrp[priv->num_grps].interruptReceive == NO_IRQ ||
579 priv->gfargrp[priv->num_grps].interruptError == NO_IRQ)
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000580 return -EINVAL;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000581 }
582
583 priv->gfargrp[priv->num_grps].grp_id = priv->num_grps;
584 priv->gfargrp[priv->num_grps].priv = priv;
585 spin_lock_init(&priv->gfargrp[priv->num_grps].grplock);
586 if(priv->mode == MQ_MG_MODE) {
587 queue_mask = (u32 *)of_get_property(np,
588 "fsl,rx-bit-map", NULL);
589 priv->gfargrp[priv->num_grps].rx_bit_map =
590 queue_mask ? *queue_mask :(DEFAULT_MAPPING >> priv->num_grps);
591 queue_mask = (u32 *)of_get_property(np,
592 "fsl,tx-bit-map", NULL);
593 priv->gfargrp[priv->num_grps].tx_bit_map =
594 queue_mask ? *queue_mask : (DEFAULT_MAPPING >> priv->num_grps);
595 } else {
596 priv->gfargrp[priv->num_grps].rx_bit_map = 0xFF;
597 priv->gfargrp[priv->num_grps].tx_bit_map = 0xFF;
598 }
599 priv->num_grps++;
600
601 return 0;
602}
603
Grant Likely2dc11582010-08-06 09:25:50 -0600604static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
Andy Flemingb31a1d82008-12-16 15:29:15 -0800605{
Andy Flemingb31a1d82008-12-16 15:29:15 -0800606 const char *model;
607 const char *ctype;
608 const void *mac_addr;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000609 int err = 0, i;
610 struct net_device *dev = NULL;
611 struct gfar_private *priv = NULL;
Grant Likely61c7a082010-04-13 16:12:29 -0700612 struct device_node *np = ofdev->dev.of_node;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000613 struct device_node *child = NULL;
Andy Fleming4d7902f2009-02-04 16:43:44 -0800614 const u32 *stash;
615 const u32 *stash_len;
616 const u32 *stash_idx;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000617 unsigned int num_tx_qs, num_rx_qs;
618 u32 *tx_queues, *rx_queues;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800619
620 if (!np || !of_device_is_available(np))
621 return -ENODEV;
622
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000623 /* parse the num of tx and rx queues */
624 tx_queues = (u32 *)of_get_property(np, "fsl,num_tx_queues", NULL);
625 num_tx_qs = tx_queues ? *tx_queues : 1;
626
627 if (num_tx_qs > MAX_TX_QS) {
Joe Perches59deab22011-06-14 08:57:47 +0000628 pr_err("num_tx_qs(=%d) greater than MAX_TX_QS(=%d)\n",
629 num_tx_qs, MAX_TX_QS);
630 pr_err("Cannot do alloc_etherdev, aborting\n");
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000631 return -EINVAL;
632 }
633
634 rx_queues = (u32 *)of_get_property(np, "fsl,num_rx_queues", NULL);
635 num_rx_qs = rx_queues ? *rx_queues : 1;
636
637 if (num_rx_qs > MAX_RX_QS) {
Joe Perches59deab22011-06-14 08:57:47 +0000638 pr_err("num_rx_qs(=%d) greater than MAX_RX_QS(=%d)\n",
639 num_rx_qs, MAX_RX_QS);
640 pr_err("Cannot do alloc_etherdev, aborting\n");
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000641 return -EINVAL;
642 }
643
644 *pdev = alloc_etherdev_mq(sizeof(*priv), num_tx_qs);
645 dev = *pdev;
646 if (NULL == dev)
647 return -ENOMEM;
648
649 priv = netdev_priv(dev);
Grant Likely61c7a082010-04-13 16:12:29 -0700650 priv->node = ofdev->dev.of_node;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000651 priv->ndev = dev;
652
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000653 priv->num_tx_queues = num_tx_qs;
Ben Hutchingsfe069122010-09-27 08:27:37 +0000654 netif_set_real_num_rx_queues(dev, num_rx_qs);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000655 priv->num_rx_queues = num_rx_qs;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000656 priv->num_grps = 0x0;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800657
Sebastian Poehn4aa3a712011-06-20 13:57:59 -0700658 /* Init Rx queue filer rule set linked list*/
659 INIT_LIST_HEAD(&priv->rx_list.list);
660 priv->rx_list.count = 0;
661 mutex_init(&priv->rx_queue_access);
662
Andy Flemingb31a1d82008-12-16 15:29:15 -0800663 model = of_get_property(np, "model", NULL);
664
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000665 for (i = 0; i < MAXGROUPS; i++)
666 priv->gfargrp[i].regs = NULL;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800667
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000668 /* Parse and initialize group specific information */
669 if (of_device_is_compatible(np, "fsl,etsec2")) {
670 priv->mode = MQ_MG_MODE;
671 for_each_child_of_node(np, child) {
672 err = gfar_parse_group(child, priv, model);
673 if (err)
674 goto err_grp_init;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800675 }
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000676 } else {
677 priv->mode = SQ_SG_MODE;
678 err = gfar_parse_group(np, priv, model);
679 if(err)
680 goto err_grp_init;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800681 }
682
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000683 for (i = 0; i < priv->num_tx_queues; i++)
684 priv->tx_queue[i] = NULL;
685 for (i = 0; i < priv->num_rx_queues; i++)
686 priv->rx_queue[i] = NULL;
687
688 for (i = 0; i < priv->num_tx_queues; i++) {
Joe Perchesde47f072010-05-31 17:23:12 +0000689 priv->tx_queue[i] = kzalloc(sizeof(struct gfar_priv_tx_q),
690 GFP_KERNEL);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000691 if (!priv->tx_queue[i]) {
692 err = -ENOMEM;
693 goto tx_alloc_failed;
694 }
695 priv->tx_queue[i]->tx_skbuff = NULL;
696 priv->tx_queue[i]->qindex = i;
697 priv->tx_queue[i]->dev = dev;
698 spin_lock_init(&(priv->tx_queue[i]->txlock));
699 }
700
701 for (i = 0; i < priv->num_rx_queues; i++) {
Joe Perchesde47f072010-05-31 17:23:12 +0000702 priv->rx_queue[i] = kzalloc(sizeof(struct gfar_priv_rx_q),
703 GFP_KERNEL);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000704 if (!priv->rx_queue[i]) {
705 err = -ENOMEM;
706 goto rx_alloc_failed;
707 }
708 priv->rx_queue[i]->rx_skbuff = NULL;
709 priv->rx_queue[i]->qindex = i;
710 priv->rx_queue[i]->dev = dev;
711 spin_lock_init(&(priv->rx_queue[i]->rxlock));
712 }
713
714
Andy Fleming4d7902f2009-02-04 16:43:44 -0800715 stash = of_get_property(np, "bd-stash", NULL);
716
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000717 if (stash) {
Andy Fleming4d7902f2009-02-04 16:43:44 -0800718 priv->device_flags |= FSL_GIANFAR_DEV_HAS_BD_STASHING;
719 priv->bd_stash_en = 1;
720 }
721
722 stash_len = of_get_property(np, "rx-stash-len", NULL);
723
724 if (stash_len)
725 priv->rx_stash_size = *stash_len;
726
727 stash_idx = of_get_property(np, "rx-stash-idx", NULL);
728
729 if (stash_idx)
730 priv->rx_stash_index = *stash_idx;
731
732 if (stash_len || stash_idx)
733 priv->device_flags |= FSL_GIANFAR_DEV_HAS_BUF_STASHING;
734
Andy Flemingb31a1d82008-12-16 15:29:15 -0800735 mac_addr = of_get_mac_address(np);
736 if (mac_addr)
737 memcpy(dev->dev_addr, mac_addr, MAC_ADDR_LEN);
738
739 if (model && !strcasecmp(model, "TSEC"))
740 priv->device_flags =
741 FSL_GIANFAR_DEV_HAS_GIGABIT |
742 FSL_GIANFAR_DEV_HAS_COALESCE |
743 FSL_GIANFAR_DEV_HAS_RMON |
744 FSL_GIANFAR_DEV_HAS_MULTI_INTR;
745 if (model && !strcasecmp(model, "eTSEC"))
746 priv->device_flags =
747 FSL_GIANFAR_DEV_HAS_GIGABIT |
748 FSL_GIANFAR_DEV_HAS_COALESCE |
749 FSL_GIANFAR_DEV_HAS_RMON |
750 FSL_GIANFAR_DEV_HAS_MULTI_INTR |
Dai Haruki2c2db482008-12-16 15:31:15 -0800751 FSL_GIANFAR_DEV_HAS_PADDING |
Andy Flemingb31a1d82008-12-16 15:29:15 -0800752 FSL_GIANFAR_DEV_HAS_CSUM |
753 FSL_GIANFAR_DEV_HAS_VLAN |
754 FSL_GIANFAR_DEV_HAS_MAGIC_PACKET |
Manfred Rudigier97553f72010-06-11 01:49:05 +0000755 FSL_GIANFAR_DEV_HAS_EXTENDED_HASH |
756 FSL_GIANFAR_DEV_HAS_TIMER;
Andy Flemingb31a1d82008-12-16 15:29:15 -0800757
758 ctype = of_get_property(np, "phy-connection-type", NULL);
759
760 /* We only care about rgmii-id. The rest are autodetected */
761 if (ctype && !strcmp(ctype, "rgmii-id"))
762 priv->interface = PHY_INTERFACE_MODE_RGMII_ID;
763 else
764 priv->interface = PHY_INTERFACE_MODE_MII;
765
766 if (of_get_property(np, "fsl,magic-packet", NULL))
767 priv->device_flags |= FSL_GIANFAR_DEV_HAS_MAGIC_PACKET;
768
Grant Likelyfe192a42009-04-25 12:53:12 +0000769 priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
Andy Flemingb31a1d82008-12-16 15:29:15 -0800770
771 /* Find the TBI PHY. If it's not there, we don't support SGMII */
Grant Likelyfe192a42009-04-25 12:53:12 +0000772 priv->tbi_node = of_parse_phandle(np, "tbi-handle", 0);
Andy Flemingb31a1d82008-12-16 15:29:15 -0800773
774 return 0;
775
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000776rx_alloc_failed:
777 free_rx_pointers(priv);
778tx_alloc_failed:
779 free_tx_pointers(priv);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000780err_grp_init:
781 unmap_group_regs(priv);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000782 free_netdev(dev);
Andy Flemingb31a1d82008-12-16 15:29:15 -0800783 return err;
784}
785
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000786static int gfar_hwtstamp_ioctl(struct net_device *netdev,
787 struct ifreq *ifr, int cmd)
788{
789 struct hwtstamp_config config;
790 struct gfar_private *priv = netdev_priv(netdev);
791
792 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
793 return -EFAULT;
794
795 /* reserved for future extensions */
796 if (config.flags)
797 return -EINVAL;
798
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +0000799 switch (config.tx_type) {
800 case HWTSTAMP_TX_OFF:
801 priv->hwts_tx_en = 0;
802 break;
803 case HWTSTAMP_TX_ON:
804 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER))
805 return -ERANGE;
806 priv->hwts_tx_en = 1;
807 break;
808 default:
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000809 return -ERANGE;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +0000810 }
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000811
812 switch (config.rx_filter) {
813 case HWTSTAMP_FILTER_NONE:
Manfred Rudigier97553f72010-06-11 01:49:05 +0000814 if (priv->hwts_rx_en) {
815 stop_gfar(netdev);
816 priv->hwts_rx_en = 0;
817 startup_gfar(netdev);
818 }
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000819 break;
820 default:
821 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER))
822 return -ERANGE;
Manfred Rudigier97553f72010-06-11 01:49:05 +0000823 if (!priv->hwts_rx_en) {
824 stop_gfar(netdev);
825 priv->hwts_rx_en = 1;
826 startup_gfar(netdev);
827 }
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000828 config.rx_filter = HWTSTAMP_FILTER_ALL;
829 break;
830 }
831
832 return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
833 -EFAULT : 0;
834}
835
Clifford Wolf0faac9f2009-01-09 10:23:11 +0000836/* Ioctl MII Interface */
837static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
838{
839 struct gfar_private *priv = netdev_priv(dev);
840
841 if (!netif_running(dev))
842 return -EINVAL;
843
Manfred Rudigiercc772ab2010-04-08 23:10:03 +0000844 if (cmd == SIOCSHWTSTAMP)
845 return gfar_hwtstamp_ioctl(dev, rq, cmd);
846
Clifford Wolf0faac9f2009-01-09 10:23:11 +0000847 if (!priv->phydev)
848 return -ENODEV;
849
Richard Cochran28b04112010-07-17 08:48:55 +0000850 return phy_mii_ioctl(priv->phydev, rq, cmd);
Clifford Wolf0faac9f2009-01-09 10:23:11 +0000851}
852
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000853static unsigned int reverse_bitmap(unsigned int bit_map, unsigned int max_qs)
854{
855 unsigned int new_bit_map = 0x0;
856 int mask = 0x1 << (max_qs - 1), i;
857 for (i = 0; i < max_qs; i++) {
858 if (bit_map & mask)
859 new_bit_map = new_bit_map + (1 << i);
860 mask = mask >> 0x1;
861 }
862 return new_bit_map;
863}
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000864
Anton Vorontsov18294ad2009-11-04 12:53:00 +0000865static u32 cluster_entry_per_class(struct gfar_private *priv, u32 rqfar,
866 u32 class)
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000867{
868 u32 rqfpr = FPR_FILER_MASK;
869 u32 rqfcr = 0x0;
870
871 rqfar--;
872 rqfcr = RQFCR_CLE | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
Wu Jiajun-B063786c43e042011-06-07 21:46:51 +0000873 priv->ftp_rqfpr[rqfar] = rqfpr;
874 priv->ftp_rqfcr[rqfar] = rqfcr;
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000875 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
876
877 rqfar--;
878 rqfcr = RQFCR_CMP_NOMATCH;
Wu Jiajun-B063786c43e042011-06-07 21:46:51 +0000879 priv->ftp_rqfpr[rqfar] = rqfpr;
880 priv->ftp_rqfcr[rqfar] = rqfcr;
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000881 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
882
883 rqfar--;
884 rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_PARSE | RQFCR_CLE | RQFCR_AND;
885 rqfpr = class;
Wu Jiajun-B063786c43e042011-06-07 21:46:51 +0000886 priv->ftp_rqfcr[rqfar] = rqfcr;
887 priv->ftp_rqfpr[rqfar] = rqfpr;
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000888 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
889
890 rqfar--;
891 rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_MASK | RQFCR_AND;
892 rqfpr = class;
Wu Jiajun-B063786c43e042011-06-07 21:46:51 +0000893 priv->ftp_rqfcr[rqfar] = rqfcr;
894 priv->ftp_rqfpr[rqfar] = rqfpr;
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000895 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
896
897 return rqfar;
898}
899
900static void gfar_init_filer_table(struct gfar_private *priv)
901{
902 int i = 0x0;
903 u32 rqfar = MAX_FILER_IDX;
904 u32 rqfcr = 0x0;
905 u32 rqfpr = FPR_FILER_MASK;
906
907 /* Default rule */
908 rqfcr = RQFCR_CMP_MATCH;
Wu Jiajun-B063786c43e042011-06-07 21:46:51 +0000909 priv->ftp_rqfcr[rqfar] = rqfcr;
910 priv->ftp_rqfpr[rqfar] = rqfpr;
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000911 gfar_write_filer(priv, rqfar, rqfcr, rqfpr);
912
913 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6);
914 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_UDP);
915 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_TCP);
916 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4);
917 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_UDP);
918 rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_TCP);
919
Uwe Kleine-König85dd08e2010-06-11 12:16:55 +0200920 /* cur_filer_idx indicated the first non-masked rule */
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000921 priv->cur_filer_idx = rqfar;
922
923 /* Rest are masked rules */
924 rqfcr = RQFCR_CMP_NOMATCH;
925 for (i = 0; i < rqfar; i++) {
Wu Jiajun-B063786c43e042011-06-07 21:46:51 +0000926 priv->ftp_rqfcr[i] = rqfcr;
927 priv->ftp_rqfpr[i] = rqfpr;
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +0000928 gfar_write_filer(priv, i, rqfcr, rqfpr);
929 }
930}
931
Anton Vorontsov7d350972010-06-30 06:39:12 +0000932static void gfar_detect_errata(struct gfar_private *priv)
933{
934 struct device *dev = &priv->ofdev->dev;
935 unsigned int pvr = mfspr(SPRN_PVR);
936 unsigned int svr = mfspr(SPRN_SVR);
937 unsigned int mod = (svr >> 16) & 0xfff6; /* w/o E suffix */
938 unsigned int rev = svr & 0xffff;
939
940 /* MPC8313 Rev 2.0 and higher; All MPC837x */
941 if ((pvr == 0x80850010 && mod == 0x80b0 && rev >= 0x0020) ||
942 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
943 priv->errata |= GFAR_ERRATA_74;
944
Anton Vorontsovdeb90ea2010-06-30 06:39:13 +0000945 /* MPC8313 and MPC837x all rev */
946 if ((pvr == 0x80850010 && mod == 0x80b0) ||
947 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
948 priv->errata |= GFAR_ERRATA_76;
949
Anton Vorontsov511d9342010-06-30 06:39:15 +0000950 /* MPC8313 and MPC837x all rev */
951 if ((pvr == 0x80850010 && mod == 0x80b0) ||
952 (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
953 priv->errata |= GFAR_ERRATA_A002;
954
Alex Dubov4363c2f2011-03-16 17:57:13 +0000955 /* MPC8313 Rev < 2.0, MPC8548 rev 2.0 */
956 if ((pvr == 0x80850010 && mod == 0x80b0 && rev < 0x0020) ||
957 (pvr == 0x80210020 && mod == 0x8030 && rev == 0x0020))
958 priv->errata |= GFAR_ERRATA_12;
959
Anton Vorontsov7d350972010-06-30 06:39:12 +0000960 if (priv->errata)
961 dev_info(dev, "enabled errata workarounds, flags: 0x%x\n",
962 priv->errata);
963}
964
Andy Flemingbb40dcb2005-09-23 22:54:21 -0400965/* Set up the ethernet device structure, private data,
966 * and anything else we need before we start */
Grant Likely74888762011-02-22 21:05:51 -0700967static int gfar_probe(struct platform_device *ofdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968{
969 u32 tempval;
970 struct net_device *dev = NULL;
971 struct gfar_private *priv = NULL;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000972 struct gfar __iomem *regs = NULL;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000973 int err = 0, i, grp_idx = 0;
Dai Harukic50a5d92008-12-17 16:51:32 -0800974 int len_devname;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000975 u32 rstat = 0, tstat = 0, rqueue = 0, tqueue = 0;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000976 u32 isrg = 0;
Anton Vorontsov18294ad2009-11-04 12:53:00 +0000977 u32 __iomem *baddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000979 err = gfar_of_init(ofdev, &dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000981 if (err)
982 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983
984 priv = netdev_priv(dev);
Kumar Gala48268572009-03-18 23:28:22 -0700985 priv->ndev = dev;
986 priv->ofdev = ofdev;
Grant Likely61c7a082010-04-13 16:12:29 -0700987 priv->node = ofdev->dev.of_node;
Kumar Gala48268572009-03-18 23:28:22 -0700988 SET_NETDEV_DEV(dev, &ofdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989
Scott Woodd87eb122008-07-11 18:04:45 -0500990 spin_lock_init(&priv->bflock);
Sebastian Siewiorab939902008-08-19 21:12:45 +0200991 INIT_WORK(&priv->reset_task, gfar_reset_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992
Andy Flemingb31a1d82008-12-16 15:29:15 -0800993 dev_set_drvdata(&ofdev->dev, priv);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000994 regs = priv->gfargrp[0].regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995
Anton Vorontsov7d350972010-06-30 06:39:12 +0000996 gfar_detect_errata(priv);
997
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 /* Stop the DMA engine now, in case it was running before */
999 /* (The firmware could have used it, and left it running). */
Andy Fleming257d9382008-12-16 15:25:45 -08001000 gfar_halt(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001
1002 /* Reset MAC layer */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001003 gfar_write(&regs->maccfg1, MACCFG1_SOFT_RESET);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004
Andy Flemingb98ac702009-02-04 16:38:05 -08001005 /* We need to delay at least 3 TX clocks */
1006 udelay(2);
1007
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001009 gfar_write(&regs->maccfg1, tempval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010
1011 /* Initialize MACCFG2. */
Anton Vorontsov7d350972010-06-30 06:39:12 +00001012 tempval = MACCFG2_INIT_SETTINGS;
1013 if (gfar_has_errata(priv, GFAR_ERRATA_74))
1014 tempval |= MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK;
1015 gfar_write(&regs->maccfg2, tempval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016
1017 /* Initialize ECNTRL */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001018 gfar_write(&regs->ecntrl, ECNTRL_INIT_SETTINGS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 /* Set the dev->base_addr to the gfar reg region */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001021 dev->base_addr = (unsigned long) regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022
Andy Flemingb31a1d82008-12-16 15:29:15 -08001023 SET_NETDEV_DEV(dev, &ofdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024
1025 /* Fill in the dev structure */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 dev->watchdog_timeo = TX_TIMEOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 dev->mtu = 1500;
Andy Fleming26ccfc32009-03-10 12:58:28 +00001028 dev->netdev_ops = &gfar_netdev_ops;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001029 dev->ethtool_ops = &gfar_ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001031 /* Register for napi ...We are registering NAPI for each grp */
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001032 for (i = 0; i < priv->num_grps; i++)
1033 netif_napi_add(dev, &priv->gfargrp[i].napi, gfar_poll, GFAR_DEV_WEIGHT);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001034
Andy Flemingb31a1d82008-12-16 15:29:15 -08001035 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) {
Michał Mirosław8b3afe92011-04-15 04:50:50 +00001036 dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG |
1037 NETIF_F_RXCSUM;
1038 dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG |
1039 NETIF_F_RXCSUM | NETIF_F_HIGHDMA;
1040 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041
Jiri Pirko87c288c2011-07-20 04:54:19 +00001042 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) {
1043 dev->hw_features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001044 dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
Jiri Pirko87c288c2011-07-20 04:54:19 +00001045 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05001046
Andy Flemingb31a1d82008-12-16 15:29:15 -08001047 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001048 priv->extended_hash = 1;
1049 priv->hash_width = 9;
1050
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001051 priv->hash_regs[0] = &regs->igaddr0;
1052 priv->hash_regs[1] = &regs->igaddr1;
1053 priv->hash_regs[2] = &regs->igaddr2;
1054 priv->hash_regs[3] = &regs->igaddr3;
1055 priv->hash_regs[4] = &regs->igaddr4;
1056 priv->hash_regs[5] = &regs->igaddr5;
1057 priv->hash_regs[6] = &regs->igaddr6;
1058 priv->hash_regs[7] = &regs->igaddr7;
1059 priv->hash_regs[8] = &regs->gaddr0;
1060 priv->hash_regs[9] = &regs->gaddr1;
1061 priv->hash_regs[10] = &regs->gaddr2;
1062 priv->hash_regs[11] = &regs->gaddr3;
1063 priv->hash_regs[12] = &regs->gaddr4;
1064 priv->hash_regs[13] = &regs->gaddr5;
1065 priv->hash_regs[14] = &regs->gaddr6;
1066 priv->hash_regs[15] = &regs->gaddr7;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001067
1068 } else {
1069 priv->extended_hash = 0;
1070 priv->hash_width = 8;
1071
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001072 priv->hash_regs[0] = &regs->gaddr0;
1073 priv->hash_regs[1] = &regs->gaddr1;
1074 priv->hash_regs[2] = &regs->gaddr2;
1075 priv->hash_regs[3] = &regs->gaddr3;
1076 priv->hash_regs[4] = &regs->gaddr4;
1077 priv->hash_regs[5] = &regs->gaddr5;
1078 priv->hash_regs[6] = &regs->gaddr6;
1079 priv->hash_regs[7] = &regs->gaddr7;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001080 }
1081
Andy Flemingb31a1d82008-12-16 15:29:15 -08001082 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_PADDING)
Kumar Gala0bbaf062005-06-20 10:54:21 -05001083 priv->padding = DEFAULT_PADDING;
1084 else
1085 priv->padding = 0;
1086
Manfred Rudigiercc772ab2010-04-08 23:10:03 +00001087 if (dev->features & NETIF_F_IP_CSUM ||
1088 priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)
Kumar Gala0bbaf062005-06-20 10:54:21 -05001089 dev->hard_header_len += GMAC_FCB_LEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001091 /* Program the isrg regs only if number of grps > 1 */
1092 if (priv->num_grps > 1) {
1093 baddr = &regs->isrg0;
1094 for (i = 0; i < priv->num_grps; i++) {
1095 isrg |= (priv->gfargrp[i].rx_bit_map << ISRG_SHIFT_RX);
1096 isrg |= (priv->gfargrp[i].tx_bit_map << ISRG_SHIFT_TX);
1097 gfar_write(baddr, isrg);
1098 baddr++;
1099 isrg = 0x0;
1100 }
1101 }
1102
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001103 /* Need to reverse the bit maps as bit_map's MSB is q0
Akinobu Mita984b3f52010-03-05 13:41:37 -08001104 * but, for_each_set_bit parses from right to left, which
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001105 * basically reverses the queue numbers */
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001106 for (i = 0; i< priv->num_grps; i++) {
1107 priv->gfargrp[i].tx_bit_map = reverse_bitmap(
1108 priv->gfargrp[i].tx_bit_map, MAX_TX_QS);
1109 priv->gfargrp[i].rx_bit_map = reverse_bitmap(
1110 priv->gfargrp[i].rx_bit_map, MAX_RX_QS);
1111 }
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001112
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001113 /* Calculate RSTAT, TSTAT, RQUEUE and TQUEUE values,
1114 * also assign queues to groups */
1115 for (grp_idx = 0; grp_idx < priv->num_grps; grp_idx++) {
1116 priv->gfargrp[grp_idx].num_rx_queues = 0x0;
Akinobu Mita984b3f52010-03-05 13:41:37 -08001117 for_each_set_bit(i, &priv->gfargrp[grp_idx].rx_bit_map,
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001118 priv->num_rx_queues) {
1119 priv->gfargrp[grp_idx].num_rx_queues++;
1120 priv->rx_queue[i]->grp = &priv->gfargrp[grp_idx];
1121 rstat = rstat | (RSTAT_CLEAR_RHALT >> i);
1122 rqueue = rqueue | ((RQUEUE_EN0 | RQUEUE_EX0) >> i);
1123 }
1124 priv->gfargrp[grp_idx].num_tx_queues = 0x0;
Akinobu Mita984b3f52010-03-05 13:41:37 -08001125 for_each_set_bit(i, &priv->gfargrp[grp_idx].tx_bit_map,
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001126 priv->num_tx_queues) {
1127 priv->gfargrp[grp_idx].num_tx_queues++;
1128 priv->tx_queue[i]->grp = &priv->gfargrp[grp_idx];
1129 tstat = tstat | (TSTAT_CLEAR_THALT >> i);
1130 tqueue = tqueue | (TQUEUE_EN0 >> i);
1131 }
1132 priv->gfargrp[grp_idx].rstat = rstat;
1133 priv->gfargrp[grp_idx].tstat = tstat;
1134 rstat = tstat =0;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001135 }
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001136
1137 gfar_write(&regs->rqueue, rqueue);
1138 gfar_write(&regs->tqueue, tqueue);
1139
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001142 /* Initializing some of the rx/tx queue level parameters */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001143 for (i = 0; i < priv->num_tx_queues; i++) {
1144 priv->tx_queue[i]->tx_ring_size = DEFAULT_TX_RING_SIZE;
1145 priv->tx_queue[i]->num_txbdfree = DEFAULT_TX_RING_SIZE;
1146 priv->tx_queue[i]->txcoalescing = DEFAULT_TX_COALESCE;
1147 priv->tx_queue[i]->txic = DEFAULT_TXIC;
1148 }
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001149
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001150 for (i = 0; i < priv->num_rx_queues; i++) {
1151 priv->rx_queue[i]->rx_ring_size = DEFAULT_RX_RING_SIZE;
1152 priv->rx_queue[i]->rxcoalescing = DEFAULT_RX_COALESCE;
1153 priv->rx_queue[i]->rxic = DEFAULT_RXIC;
1154 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155
Sebastian Poehn4aa3a712011-06-20 13:57:59 -07001156 /* always enable rx filer*/
1157 priv->rx_filer_enable = 1;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001158 /* Enable most messages by default */
1159 priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
1160
Trent Piephod3eab822008-10-02 11:12:24 +00001161 /* Carrier starts down, phylib will bring it up */
1162 netif_carrier_off(dev);
1163
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 err = register_netdev(dev);
1165
1166 if (err) {
Joe Perches59deab22011-06-14 08:57:47 +00001167 pr_err("%s: Cannot register net device, aborting\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 goto register_fail;
1169 }
1170
Anton Vorontsov2884e5c2009-02-01 00:52:34 -08001171 device_init_wakeup(&dev->dev,
1172 priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
1173
Dai Harukic50a5d92008-12-17 16:51:32 -08001174 /* fill out IRQ number and name fields */
1175 len_devname = strlen(dev->name);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001176 for (i = 0; i < priv->num_grps; i++) {
1177 strncpy(&priv->gfargrp[i].int_name_tx[0], dev->name,
1178 len_devname);
1179 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
1180 strncpy(&priv->gfargrp[i].int_name_tx[len_devname],
1181 "_g", sizeof("_g"));
1182 priv->gfargrp[i].int_name_tx[
1183 strlen(priv->gfargrp[i].int_name_tx)] = i+48;
1184 strncpy(&priv->gfargrp[i].int_name_tx[strlen(
1185 priv->gfargrp[i].int_name_tx)],
1186 "_tx", sizeof("_tx") + 1);
Dai Harukic50a5d92008-12-17 16:51:32 -08001187
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001188 strncpy(&priv->gfargrp[i].int_name_rx[0], dev->name,
1189 len_devname);
1190 strncpy(&priv->gfargrp[i].int_name_rx[len_devname],
1191 "_g", sizeof("_g"));
1192 priv->gfargrp[i].int_name_rx[
1193 strlen(priv->gfargrp[i].int_name_rx)] = i+48;
1194 strncpy(&priv->gfargrp[i].int_name_rx[strlen(
1195 priv->gfargrp[i].int_name_rx)],
1196 "_rx", sizeof("_rx") + 1);
Dai Harukic50a5d92008-12-17 16:51:32 -08001197
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001198 strncpy(&priv->gfargrp[i].int_name_er[0], dev->name,
1199 len_devname);
1200 strncpy(&priv->gfargrp[i].int_name_er[len_devname],
1201 "_g", sizeof("_g"));
1202 priv->gfargrp[i].int_name_er[strlen(
1203 priv->gfargrp[i].int_name_er)] = i+48;
1204 strncpy(&priv->gfargrp[i].int_name_er[strlen(\
1205 priv->gfargrp[i].int_name_er)],
1206 "_er", sizeof("_er") + 1);
1207 } else
1208 priv->gfargrp[i].int_name_tx[len_devname] = '\0';
1209 }
Dai Harukic50a5d92008-12-17 16:51:32 -08001210
Sandeep Gopalpet7a8b3372009-11-02 07:03:40 +00001211 /* Initialize the filer table */
1212 gfar_init_filer_table(priv);
1213
Andy Fleming7f7f5312005-11-11 12:38:59 -06001214 /* Create all the sysfs files */
1215 gfar_init_sysfs(dev);
1216
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 /* Print out the device info */
Joe Perches59deab22011-06-14 08:57:47 +00001218 netdev_info(dev, "mac: %pM\n", dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219
1220 /* Even more device info helps when determining which kernel */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001221 /* provided which set of benchmarks. */
Joe Perches59deab22011-06-14 08:57:47 +00001222 netdev_info(dev, "Running with NAPI enabled\n");
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001223 for (i = 0; i < priv->num_rx_queues; i++)
Joe Perches59deab22011-06-14 08:57:47 +00001224 netdev_info(dev, "RX BD ring size for Q[%d]: %d\n",
1225 i, priv->rx_queue[i]->rx_ring_size);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001226 for(i = 0; i < priv->num_tx_queues; i++)
Joe Perches59deab22011-06-14 08:57:47 +00001227 netdev_info(dev, "TX BD ring size for Q[%d]: %d\n",
1228 i, priv->tx_queue[i]->tx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229
1230 return 0;
1231
1232register_fail:
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001233 unmap_group_regs(priv);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001234 free_tx_pointers(priv);
1235 free_rx_pointers(priv);
Grant Likelyfe192a42009-04-25 12:53:12 +00001236 if (priv->phy_node)
1237 of_node_put(priv->phy_node);
1238 if (priv->tbi_node)
1239 of_node_put(priv->tbi_node);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 free_netdev(dev);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001241 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242}
1243
Grant Likely2dc11582010-08-06 09:25:50 -06001244static int gfar_remove(struct platform_device *ofdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245{
Andy Flemingb31a1d82008-12-16 15:29:15 -08001246 struct gfar_private *priv = dev_get_drvdata(&ofdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247
Grant Likelyfe192a42009-04-25 12:53:12 +00001248 if (priv->phy_node)
1249 of_node_put(priv->phy_node);
1250 if (priv->tbi_node)
1251 of_node_put(priv->tbi_node);
1252
Andy Flemingb31a1d82008-12-16 15:29:15 -08001253 dev_set_drvdata(&ofdev->dev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
David S. Millerd9d8e042009-09-06 01:41:02 -07001255 unregister_netdev(priv->ndev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001256 unmap_group_regs(priv);
Kumar Gala48268572009-03-18 23:28:22 -07001257 free_netdev(priv->ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
1259 return 0;
1260}
1261
Scott Woodd87eb122008-07-11 18:04:45 -05001262#ifdef CONFIG_PM
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001263
1264static int gfar_suspend(struct device *dev)
Scott Woodd87eb122008-07-11 18:04:45 -05001265{
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001266 struct gfar_private *priv = dev_get_drvdata(dev);
1267 struct net_device *ndev = priv->ndev;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001268 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Scott Woodd87eb122008-07-11 18:04:45 -05001269 unsigned long flags;
1270 u32 tempval;
1271
1272 int magic_packet = priv->wol_en &&
Andy Flemingb31a1d82008-12-16 15:29:15 -08001273 (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
Scott Woodd87eb122008-07-11 18:04:45 -05001274
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001275 netif_device_detach(ndev);
Scott Woodd87eb122008-07-11 18:04:45 -05001276
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001277 if (netif_running(ndev)) {
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001278
1279 local_irq_save(flags);
1280 lock_tx_qs(priv);
1281 lock_rx_qs(priv);
Scott Woodd87eb122008-07-11 18:04:45 -05001282
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001283 gfar_halt_nodisable(ndev);
Scott Woodd87eb122008-07-11 18:04:45 -05001284
1285 /* Disable Tx, and Rx if wake-on-LAN is disabled. */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001286 tempval = gfar_read(&regs->maccfg1);
Scott Woodd87eb122008-07-11 18:04:45 -05001287
1288 tempval &= ~MACCFG1_TX_EN;
1289
1290 if (!magic_packet)
1291 tempval &= ~MACCFG1_RX_EN;
1292
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001293 gfar_write(&regs->maccfg1, tempval);
Scott Woodd87eb122008-07-11 18:04:45 -05001294
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001295 unlock_rx_qs(priv);
1296 unlock_tx_qs(priv);
1297 local_irq_restore(flags);
Scott Woodd87eb122008-07-11 18:04:45 -05001298
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001299 disable_napi(priv);
Scott Woodd87eb122008-07-11 18:04:45 -05001300
1301 if (magic_packet) {
1302 /* Enable interrupt on Magic Packet */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001303 gfar_write(&regs->imask, IMASK_MAG);
Scott Woodd87eb122008-07-11 18:04:45 -05001304
1305 /* Enable Magic Packet mode */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001306 tempval = gfar_read(&regs->maccfg2);
Scott Woodd87eb122008-07-11 18:04:45 -05001307 tempval |= MACCFG2_MPEN;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001308 gfar_write(&regs->maccfg2, tempval);
Scott Woodd87eb122008-07-11 18:04:45 -05001309 } else {
1310 phy_stop(priv->phydev);
1311 }
1312 }
1313
1314 return 0;
1315}
1316
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001317static int gfar_resume(struct device *dev)
Scott Woodd87eb122008-07-11 18:04:45 -05001318{
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001319 struct gfar_private *priv = dev_get_drvdata(dev);
1320 struct net_device *ndev = priv->ndev;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001321 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Scott Woodd87eb122008-07-11 18:04:45 -05001322 unsigned long flags;
1323 u32 tempval;
1324 int magic_packet = priv->wol_en &&
Andy Flemingb31a1d82008-12-16 15:29:15 -08001325 (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
Scott Woodd87eb122008-07-11 18:04:45 -05001326
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001327 if (!netif_running(ndev)) {
1328 netif_device_attach(ndev);
Scott Woodd87eb122008-07-11 18:04:45 -05001329 return 0;
1330 }
1331
1332 if (!magic_packet && priv->phydev)
1333 phy_start(priv->phydev);
1334
1335 /* Disable Magic Packet mode, in case something
1336 * else woke us up.
1337 */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001338 local_irq_save(flags);
1339 lock_tx_qs(priv);
1340 lock_rx_qs(priv);
Scott Woodd87eb122008-07-11 18:04:45 -05001341
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001342 tempval = gfar_read(&regs->maccfg2);
Scott Woodd87eb122008-07-11 18:04:45 -05001343 tempval &= ~MACCFG2_MPEN;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001344 gfar_write(&regs->maccfg2, tempval);
Scott Woodd87eb122008-07-11 18:04:45 -05001345
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001346 gfar_start(ndev);
Scott Woodd87eb122008-07-11 18:04:45 -05001347
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001348 unlock_rx_qs(priv);
1349 unlock_tx_qs(priv);
1350 local_irq_restore(flags);
Scott Woodd87eb122008-07-11 18:04:45 -05001351
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001352 netif_device_attach(ndev);
Scott Woodd87eb122008-07-11 18:04:45 -05001353
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001354 enable_napi(priv);
Scott Woodd87eb122008-07-11 18:04:45 -05001355
1356 return 0;
1357}
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001358
1359static int gfar_restore(struct device *dev)
1360{
1361 struct gfar_private *priv = dev_get_drvdata(dev);
1362 struct net_device *ndev = priv->ndev;
1363
1364 if (!netif_running(ndev))
1365 return 0;
1366
1367 gfar_init_bds(ndev);
1368 init_registers(ndev);
1369 gfar_set_mac_address(ndev);
1370 gfar_init_mac(ndev);
1371 gfar_start(ndev);
1372
1373 priv->oldlink = 0;
1374 priv->oldspeed = 0;
1375 priv->oldduplex = -1;
1376
1377 if (priv->phydev)
1378 phy_start(priv->phydev);
1379
1380 netif_device_attach(ndev);
Anton Vorontsov5ea681d2009-11-10 14:11:05 +00001381 enable_napi(priv);
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001382
1383 return 0;
1384}
1385
1386static struct dev_pm_ops gfar_pm_ops = {
1387 .suspend = gfar_suspend,
1388 .resume = gfar_resume,
1389 .freeze = gfar_suspend,
1390 .thaw = gfar_resume,
1391 .restore = gfar_restore,
1392};
1393
1394#define GFAR_PM_OPS (&gfar_pm_ops)
1395
Scott Woodd87eb122008-07-11 18:04:45 -05001396#else
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001397
1398#define GFAR_PM_OPS NULL
Anton Vorontsovbe926fc2009-10-12 06:00:42 +00001399
Scott Woodd87eb122008-07-11 18:04:45 -05001400#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001402/* Reads the controller's registers to determine what interface
1403 * connects it to the PHY.
1404 */
1405static phy_interface_t gfar_get_interface(struct net_device *dev)
1406{
1407 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001408 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001409 u32 ecntrl;
1410
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001411 ecntrl = gfar_read(&regs->ecntrl);
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001412
1413 if (ecntrl & ECNTRL_SGMII_MODE)
1414 return PHY_INTERFACE_MODE_SGMII;
1415
1416 if (ecntrl & ECNTRL_TBI_MODE) {
1417 if (ecntrl & ECNTRL_REDUCED_MODE)
1418 return PHY_INTERFACE_MODE_RTBI;
1419 else
1420 return PHY_INTERFACE_MODE_TBI;
1421 }
1422
1423 if (ecntrl & ECNTRL_REDUCED_MODE) {
1424 if (ecntrl & ECNTRL_REDUCED_MII_MODE)
1425 return PHY_INTERFACE_MODE_RMII;
Andy Fleming7132ab72007-07-11 11:43:07 -05001426 else {
Andy Flemingb31a1d82008-12-16 15:29:15 -08001427 phy_interface_t interface = priv->interface;
Andy Fleming7132ab72007-07-11 11:43:07 -05001428
1429 /*
1430 * This isn't autodetected right now, so it must
1431 * be set by the device tree or platform code.
1432 */
1433 if (interface == PHY_INTERFACE_MODE_RGMII_ID)
1434 return PHY_INTERFACE_MODE_RGMII_ID;
1435
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001436 return PHY_INTERFACE_MODE_RGMII;
Andy Fleming7132ab72007-07-11 11:43:07 -05001437 }
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001438 }
1439
Andy Flemingb31a1d82008-12-16 15:29:15 -08001440 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT)
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001441 return PHY_INTERFACE_MODE_GMII;
1442
1443 return PHY_INTERFACE_MODE_MII;
1444}
1445
1446
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001447/* Initializes driver's PHY state, and attaches to the PHY.
1448 * Returns 0 on success.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449 */
1450static int init_phy(struct net_device *dev)
1451{
1452 struct gfar_private *priv = netdev_priv(dev);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001453 uint gigabit_support =
Andy Flemingb31a1d82008-12-16 15:29:15 -08001454 priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001455 SUPPORTED_1000baseT_Full : 0;
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001456 phy_interface_t interface;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457
1458 priv->oldlink = 0;
1459 priv->oldspeed = 0;
1460 priv->oldduplex = -1;
1461
Andy Fleminge8a2b6a2006-12-01 12:01:06 -06001462 interface = gfar_get_interface(dev);
1463
Anton Vorontsov1db780f2009-07-16 21:31:42 +00001464 priv->phydev = of_phy_connect(dev, priv->phy_node, &adjust_link, 0,
1465 interface);
1466 if (!priv->phydev)
1467 priv->phydev = of_phy_connect_fixed_link(dev, &adjust_link,
1468 interface);
1469 if (!priv->phydev) {
1470 dev_err(&dev->dev, "could not attach to PHY\n");
1471 return -ENODEV;
Grant Likelyfe192a42009-04-25 12:53:12 +00001472 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473
Kapil Junejad3c12872007-05-11 18:25:11 -05001474 if (interface == PHY_INTERFACE_MODE_SGMII)
1475 gfar_configure_serdes(dev);
1476
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001477 /* Remove any features not supported by the controller */
Grant Likelyfe192a42009-04-25 12:53:12 +00001478 priv->phydev->supported &= (GFAR_SUPPORTED | gigabit_support);
1479 priv->phydev->advertising = priv->phydev->supported;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480
1481 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482}
1483
Paul Gortmakerd0313582008-04-17 00:08:10 -04001484/*
1485 * Initialize TBI PHY interface for communicating with the
1486 * SERDES lynx PHY on the chip. We communicate with this PHY
1487 * through the MDIO bus on each controller, treating it as a
1488 * "normal" PHY at the address found in the TBIPA register. We assume
1489 * that the TBIPA register is valid. Either the MDIO bus code will set
1490 * it to a value that doesn't conflict with other PHYs on the bus, or the
1491 * value doesn't matter, as there are no other PHYs on the bus.
1492 */
Kapil Junejad3c12872007-05-11 18:25:11 -05001493static void gfar_configure_serdes(struct net_device *dev)
1494{
1495 struct gfar_private *priv = netdev_priv(dev);
Grant Likelyfe192a42009-04-25 12:53:12 +00001496 struct phy_device *tbiphy;
Trent Piephoc1324192008-10-30 18:17:06 -07001497
Grant Likelyfe192a42009-04-25 12:53:12 +00001498 if (!priv->tbi_node) {
1499 dev_warn(&dev->dev, "error: SGMII mode requires that the "
1500 "device tree specify a tbi-handle\n");
1501 return;
1502 }
1503
1504 tbiphy = of_phy_find_device(priv->tbi_node);
1505 if (!tbiphy) {
1506 dev_err(&dev->dev, "error: Could not get TBI device\n");
Andy Flemingb31a1d82008-12-16 15:29:15 -08001507 return;
1508 }
Kapil Junejad3c12872007-05-11 18:25:11 -05001509
Andy Flemingb31a1d82008-12-16 15:29:15 -08001510 /*
1511 * If the link is already up, we must already be ok, and don't need to
Trent Piephobdb59f92008-10-30 18:17:07 -07001512 * configure and reset the TBI<->SerDes link. Maybe U-Boot configured
1513 * everything for us? Resetting it takes the link down and requires
1514 * several seconds for it to come back.
1515 */
Grant Likelyfe192a42009-04-25 12:53:12 +00001516 if (phy_read(tbiphy, MII_BMSR) & BMSR_LSTATUS)
Andy Flemingb31a1d82008-12-16 15:29:15 -08001517 return;
Kapil Junejad3c12872007-05-11 18:25:11 -05001518
Paul Gortmakerd0313582008-04-17 00:08:10 -04001519 /* Single clk mode, mii mode off(for serdes communication) */
Grant Likelyfe192a42009-04-25 12:53:12 +00001520 phy_write(tbiphy, MII_TBICON, TBICON_CLK_SELECT);
Kapil Junejad3c12872007-05-11 18:25:11 -05001521
Grant Likelyfe192a42009-04-25 12:53:12 +00001522 phy_write(tbiphy, MII_ADVERTISE,
Kapil Junejad3c12872007-05-11 18:25:11 -05001523 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
1524 ADVERTISE_1000XPSE_ASYM);
1525
Grant Likelyfe192a42009-04-25 12:53:12 +00001526 phy_write(tbiphy, MII_BMCR, BMCR_ANENABLE |
Kapil Junejad3c12872007-05-11 18:25:11 -05001527 BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000);
1528}
1529
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530static void init_registers(struct net_device *dev)
1531{
1532 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001533 struct gfar __iomem *regs = NULL;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001534 int i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001536 for (i = 0; i < priv->num_grps; i++) {
1537 regs = priv->gfargrp[i].regs;
1538 /* Clear IEVENT */
1539 gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001541 /* Initialize IMASK */
1542 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
1543 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001545 regs = priv->gfargrp[0].regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 /* Init hash registers to zero */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001547 gfar_write(&regs->igaddr0, 0);
1548 gfar_write(&regs->igaddr1, 0);
1549 gfar_write(&regs->igaddr2, 0);
1550 gfar_write(&regs->igaddr3, 0);
1551 gfar_write(&regs->igaddr4, 0);
1552 gfar_write(&regs->igaddr5, 0);
1553 gfar_write(&regs->igaddr6, 0);
1554 gfar_write(&regs->igaddr7, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001556 gfar_write(&regs->gaddr0, 0);
1557 gfar_write(&regs->gaddr1, 0);
1558 gfar_write(&regs->gaddr2, 0);
1559 gfar_write(&regs->gaddr3, 0);
1560 gfar_write(&regs->gaddr4, 0);
1561 gfar_write(&regs->gaddr5, 0);
1562 gfar_write(&regs->gaddr6, 0);
1563 gfar_write(&regs->gaddr7, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565 /* Zero out the rmon mib registers if it has them */
Andy Flemingb31a1d82008-12-16 15:29:15 -08001566 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001567 memset_io(&(regs->rmon), 0, sizeof (struct rmon_mib));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568
1569 /* Mask off the CAM interrupts */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001570 gfar_write(&regs->rmon.cam1, 0xffffffff);
1571 gfar_write(&regs->rmon.cam2, 0xffffffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572 }
1573
1574 /* Initialize the max receive buffer length */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001575 gfar_write(&regs->mrblr, priv->rx_buffer_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 /* Initialize the Minimum Frame Length Register */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001578 gfar_write(&regs->minflr, MINFLR_INIT_SETTINGS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579}
1580
Anton Vorontsov511d9342010-06-30 06:39:15 +00001581static int __gfar_is_rx_idle(struct gfar_private *priv)
1582{
1583 u32 res;
1584
1585 /*
1586 * Normaly TSEC should not hang on GRS commands, so we should
1587 * actually wait for IEVENT_GRSC flag.
1588 */
1589 if (likely(!gfar_has_errata(priv, GFAR_ERRATA_A002)))
1590 return 0;
1591
1592 /*
1593 * Read the eTSEC register at offset 0xD1C. If bits 7-14 are
1594 * the same as bits 23-30, the eTSEC Rx is assumed to be idle
1595 * and the Rx can be safely reset.
1596 */
1597 res = gfar_read((void __iomem *)priv->gfargrp[0].regs + 0xd1c);
1598 res &= 0x7f807f80;
1599 if ((res & 0xffff) == (res >> 16))
1600 return 1;
1601
1602 return 0;
1603}
Kumar Gala0bbaf062005-06-20 10:54:21 -05001604
1605/* Halt the receive and transmit queues */
Scott Woodd87eb122008-07-11 18:04:45 -05001606static void gfar_halt_nodisable(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607{
1608 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001609 struct gfar __iomem *regs = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610 u32 tempval;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001611 int i = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001613 for (i = 0; i < priv->num_grps; i++) {
1614 regs = priv->gfargrp[i].regs;
1615 /* Mask all interrupts */
1616 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001618 /* Clear all interrupts */
1619 gfar_write(&regs->ievent, IEVENT_INIT_CLEAR);
1620 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001622 regs = priv->gfargrp[0].regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623 /* Stop the DMA, and wait for it to stop */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001624 tempval = gfar_read(&regs->dmactrl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625 if ((tempval & (DMACTRL_GRS | DMACTRL_GTS))
1626 != (DMACTRL_GRS | DMACTRL_GTS)) {
Anton Vorontsov511d9342010-06-30 06:39:15 +00001627 int ret;
1628
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629 tempval |= (DMACTRL_GRS | DMACTRL_GTS);
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001630 gfar_write(&regs->dmactrl, tempval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631
Anton Vorontsov511d9342010-06-30 06:39:15 +00001632 do {
1633 ret = spin_event_timeout(((gfar_read(&regs->ievent) &
1634 (IEVENT_GRSC | IEVENT_GTSC)) ==
1635 (IEVENT_GRSC | IEVENT_GTSC)), 1000000, 0);
1636 if (!ret && !(gfar_read(&regs->ievent) & IEVENT_GRSC))
1637 ret = __gfar_is_rx_idle(priv);
1638 } while (!ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639 }
Scott Woodd87eb122008-07-11 18:04:45 -05001640}
Scott Woodd87eb122008-07-11 18:04:45 -05001641
1642/* Halt the receive and transmit queues */
1643void gfar_halt(struct net_device *dev)
1644{
1645 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001646 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Scott Woodd87eb122008-07-11 18:04:45 -05001647 u32 tempval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648
Scott Wood2a54adc2008-08-12 15:10:46 -05001649 gfar_halt_nodisable(dev);
1650
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651 /* Disable Rx and Tx */
1652 tempval = gfar_read(&regs->maccfg1);
1653 tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN);
1654 gfar_write(&regs->maccfg1, tempval);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001655}
1656
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001657static void free_grp_irqs(struct gfar_priv_grp *grp)
1658{
1659 free_irq(grp->interruptError, grp);
1660 free_irq(grp->interruptTransmit, grp);
1661 free_irq(grp->interruptReceive, grp);
1662}
1663
Kumar Gala0bbaf062005-06-20 10:54:21 -05001664void stop_gfar(struct net_device *dev)
1665{
1666 struct gfar_private *priv = netdev_priv(dev);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001667 unsigned long flags;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001668 int i;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001669
Andy Flemingbb40dcb2005-09-23 22:54:21 -04001670 phy_stop(priv->phydev);
1671
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001672
Kumar Gala0bbaf062005-06-20 10:54:21 -05001673 /* Lock it down */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001674 local_irq_save(flags);
1675 lock_tx_qs(priv);
1676 lock_rx_qs(priv);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001677
Kumar Gala0bbaf062005-06-20 10:54:21 -05001678 gfar_halt(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001680 unlock_rx_qs(priv);
1681 unlock_tx_qs(priv);
1682 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683
1684 /* Free the IRQs */
Andy Flemingb31a1d82008-12-16 15:29:15 -08001685 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001686 for (i = 0; i < priv->num_grps; i++)
1687 free_grp_irqs(&priv->gfargrp[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688 } else {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001689 for (i = 0; i < priv->num_grps; i++)
1690 free_irq(priv->gfargrp[i].interruptTransmit,
1691 &priv->gfargrp[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692 }
1693
1694 free_skb_resources(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695}
1696
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001697static void free_skb_tx_queue(struct gfar_priv_tx_q *tx_queue)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 struct txbd8 *txbdp;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001700 struct gfar_private *priv = netdev_priv(tx_queue->dev);
Dai Haruki4669bc92008-12-17 16:51:04 -08001701 int i, j;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001703 txbdp = tx_queue->tx_bd_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001705 for (i = 0; i < tx_queue->tx_ring_size; i++) {
1706 if (!tx_queue->tx_skbuff[i])
Dai Haruki4669bc92008-12-17 16:51:04 -08001707 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708
Kumar Gala48268572009-03-18 23:28:22 -07001709 dma_unmap_single(&priv->ofdev->dev, txbdp->bufPtr,
Dai Haruki4669bc92008-12-17 16:51:04 -08001710 txbdp->length, DMA_TO_DEVICE);
1711 txbdp->lstatus = 0;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001712 for (j = 0; j < skb_shinfo(tx_queue->tx_skbuff[i])->nr_frags;
1713 j++) {
Dai Haruki4669bc92008-12-17 16:51:04 -08001714 txbdp++;
Kumar Gala48268572009-03-18 23:28:22 -07001715 dma_unmap_page(&priv->ofdev->dev, txbdp->bufPtr,
Dai Haruki4669bc92008-12-17 16:51:04 -08001716 txbdp->length, DMA_TO_DEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717 }
Andy Flemingad5da7a2008-05-07 13:20:55 -05001718 txbdp++;
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001719 dev_kfree_skb_any(tx_queue->tx_skbuff[i]);
1720 tx_queue->tx_skbuff[i] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 }
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001722 kfree(tx_queue->tx_skbuff);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001723}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001724
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001725static void free_skb_rx_queue(struct gfar_priv_rx_q *rx_queue)
1726{
1727 struct rxbd8 *rxbdp;
1728 struct gfar_private *priv = netdev_priv(rx_queue->dev);
1729 int i;
1730
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001731 rxbdp = rx_queue->rx_bd_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001733 for (i = 0; i < rx_queue->rx_ring_size; i++) {
1734 if (rx_queue->rx_skbuff[i]) {
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001735 dma_unmap_single(&priv->ofdev->dev,
1736 rxbdp->bufPtr, priv->rx_buffer_size,
Anton Vorontsove69edd22009-10-12 06:00:30 +00001737 DMA_FROM_DEVICE);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001738 dev_kfree_skb_any(rx_queue->rx_skbuff[i]);
1739 rx_queue->rx_skbuff[i] = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 }
Anton Vorontsove69edd22009-10-12 06:00:30 +00001741 rxbdp->lstatus = 0;
1742 rxbdp->bufPtr = 0;
1743 rxbdp++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 }
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001745 kfree(rx_queue->rx_skbuff);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001746}
Anton Vorontsove69edd22009-10-12 06:00:30 +00001747
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001748/* If there are any tx skbs or rx skbs still around, free them.
1749 * Then free tx_skbuff and rx_skbuff */
1750static void free_skb_resources(struct gfar_private *priv)
1751{
1752 struct gfar_priv_tx_q *tx_queue = NULL;
1753 struct gfar_priv_rx_q *rx_queue = NULL;
1754 int i;
1755
1756 /* Go through all the buffer descriptors and free their data buffers */
1757 for (i = 0; i < priv->num_tx_queues; i++) {
1758 tx_queue = priv->tx_queue[i];
Andy Fleming7c0d10d2010-03-29 15:42:23 +00001759 if(tx_queue->tx_skbuff)
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001760 free_skb_tx_queue(tx_queue);
1761 }
1762
1763 for (i = 0; i < priv->num_rx_queues; i++) {
1764 rx_queue = priv->rx_queue[i];
Andy Fleming7c0d10d2010-03-29 15:42:23 +00001765 if(rx_queue->rx_skbuff)
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001766 free_skb_rx_queue(rx_queue);
1767 }
1768
1769 dma_free_coherent(&priv->ofdev->dev,
1770 sizeof(struct txbd8) * priv->total_tx_ring_size +
1771 sizeof(struct rxbd8) * priv->total_rx_ring_size,
1772 priv->tx_queue[0]->tx_bd_base,
1773 priv->tx_queue[0]->tx_bd_dma_base);
Sebastian Andrzej Siewior7df9c432010-05-04 22:30:47 +00001774 skb_queue_purge(&priv->rx_recycle);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775}
1776
Kumar Gala0bbaf062005-06-20 10:54:21 -05001777void gfar_start(struct net_device *dev)
1778{
1779 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001780 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001781 u32 tempval;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001782 int i = 0;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001783
1784 /* Enable Rx and Tx in MACCFG1 */
1785 tempval = gfar_read(&regs->maccfg1);
1786 tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN);
1787 gfar_write(&regs->maccfg1, tempval);
1788
1789 /* Initialize DMACTRL to have WWR and WOP */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001790 tempval = gfar_read(&regs->dmactrl);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001791 tempval |= DMACTRL_INIT_SETTINGS;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001792 gfar_write(&regs->dmactrl, tempval);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001793
Kumar Gala0bbaf062005-06-20 10:54:21 -05001794 /* Make sure we aren't stopped */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001795 tempval = gfar_read(&regs->dmactrl);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001796 tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00001797 gfar_write(&regs->dmactrl, tempval);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001798
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001799 for (i = 0; i < priv->num_grps; i++) {
1800 regs = priv->gfargrp[i].regs;
1801 /* Clear THLT/RHLT, so that the DMA starts polling now */
1802 gfar_write(&regs->tstat, priv->gfargrp[i].tstat);
1803 gfar_write(&regs->rstat, priv->gfargrp[i].rstat);
1804 /* Unmask the interrupts we look for */
1805 gfar_write(&regs->imask, IMASK_DEFAULT);
1806 }
Dai Haruki12dea572008-12-16 15:30:20 -08001807
Eric Dumazet1ae5dc32010-05-10 05:01:31 -07001808 dev->trans_start = jiffies; /* prevent tx timeout */
Kumar Gala0bbaf062005-06-20 10:54:21 -05001809}
1810
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001811void gfar_configure_coalescing(struct gfar_private *priv,
Anton Vorontsov18294ad2009-11-04 12:53:00 +00001812 unsigned long tx_mask, unsigned long rx_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813{
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001814 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Anton Vorontsov18294ad2009-11-04 12:53:00 +00001815 u32 __iomem *baddr;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001816 int i = 0;
1817
1818 /* Backward compatible case ---- even if we enable
1819 * multiple queues, there's only single reg to program
1820 */
1821 gfar_write(&regs->txic, 0);
1822 if(likely(priv->tx_queue[0]->txcoalescing))
1823 gfar_write(&regs->txic, priv->tx_queue[0]->txic);
1824
1825 gfar_write(&regs->rxic, 0);
1826 if(unlikely(priv->rx_queue[0]->rxcoalescing))
1827 gfar_write(&regs->rxic, priv->rx_queue[0]->rxic);
1828
1829 if (priv->mode == MQ_MG_MODE) {
1830 baddr = &regs->txic0;
Akinobu Mita984b3f52010-03-05 13:41:37 -08001831 for_each_set_bit(i, &tx_mask, priv->num_tx_queues) {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001832 if (likely(priv->tx_queue[i]->txcoalescing)) {
1833 gfar_write(baddr + i, 0);
1834 gfar_write(baddr + i, priv->tx_queue[i]->txic);
1835 }
1836 }
1837
1838 baddr = &regs->rxic0;
Akinobu Mita984b3f52010-03-05 13:41:37 -08001839 for_each_set_bit(i, &rx_mask, priv->num_rx_queues) {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001840 if (likely(priv->rx_queue[i]->rxcoalescing)) {
1841 gfar_write(baddr + i, 0);
1842 gfar_write(baddr + i, priv->rx_queue[i]->rxic);
1843 }
1844 }
1845 }
1846}
1847
1848static int register_grp_irqs(struct gfar_priv_grp *grp)
1849{
1850 struct gfar_private *priv = grp->priv;
1851 struct net_device *dev = priv->ndev;
Anton Vorontsovccc05c62009-10-12 06:00:26 +00001852 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 /* If the device has multiple interrupts, register for
1855 * them. Otherwise, only register for the one */
Andy Flemingb31a1d82008-12-16 15:29:15 -08001856 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05001857 /* Install our interrupt handlers for Error,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858 * Transmit, and Receive */
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001859 if ((err = request_irq(grp->interruptError, gfar_error, 0,
1860 grp->int_name_er,grp)) < 0) {
Joe Perches59deab22011-06-14 08:57:47 +00001861 netif_err(priv, intr, dev, "Can't get IRQ %d\n",
1862 grp->interruptError);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001863
Julia Lawall2145f1a2010-08-05 10:26:20 +00001864 goto err_irq_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 }
1866
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001867 if ((err = request_irq(grp->interruptTransmit, gfar_transmit,
1868 0, grp->int_name_tx, grp)) < 0) {
Joe Perches59deab22011-06-14 08:57:47 +00001869 netif_err(priv, intr, dev, "Can't get IRQ %d\n",
1870 grp->interruptTransmit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001871 goto tx_irq_fail;
1872 }
1873
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001874 if ((err = request_irq(grp->interruptReceive, gfar_receive, 0,
1875 grp->int_name_rx, grp)) < 0) {
Joe Perches59deab22011-06-14 08:57:47 +00001876 netif_err(priv, intr, dev, "Can't get IRQ %d\n",
1877 grp->interruptReceive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878 goto rx_irq_fail;
1879 }
1880 } else {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001881 if ((err = request_irq(grp->interruptTransmit, gfar_interrupt, 0,
1882 grp->int_name_tx, grp)) < 0) {
Joe Perches59deab22011-06-14 08:57:47 +00001883 netif_err(priv, intr, dev, "Can't get IRQ %d\n",
1884 grp->interruptTransmit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 goto err_irq_fail;
1886 }
1887 }
1888
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001889 return 0;
1890
1891rx_irq_fail:
1892 free_irq(grp->interruptTransmit, grp);
1893tx_irq_fail:
1894 free_irq(grp->interruptError, grp);
1895err_irq_fail:
1896 return err;
1897
1898}
1899
1900/* Bring the controller up and running */
1901int startup_gfar(struct net_device *ndev)
1902{
1903 struct gfar_private *priv = netdev_priv(ndev);
1904 struct gfar __iomem *regs = NULL;
1905 int err, i, j;
1906
1907 for (i = 0; i < priv->num_grps; i++) {
1908 regs= priv->gfargrp[i].regs;
1909 gfar_write(&regs->imask, IMASK_INIT_CLEAR);
1910 }
1911
1912 regs= priv->gfargrp[0].regs;
1913 err = gfar_alloc_skb_resources(ndev);
1914 if (err)
1915 return err;
1916
1917 gfar_init_mac(ndev);
1918
1919 for (i = 0; i < priv->num_grps; i++) {
1920 err = register_grp_irqs(&priv->gfargrp[i]);
1921 if (err) {
1922 for (j = 0; j < i; j++)
1923 free_grp_irqs(&priv->gfargrp[j]);
Anton Vorontsovff760152011-01-18 02:36:02 +00001924 goto irq_fail;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001925 }
1926 }
1927
Andy Fleming7f7f5312005-11-11 12:38:59 -06001928 /* Start the controller */
Anton Vorontsovccc05c62009-10-12 06:00:26 +00001929 gfar_start(ndev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930
Anton Vorontsov826aa4a2009-10-12 06:00:34 +00001931 phy_start(priv->phydev);
1932
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001933 gfar_configure_coalescing(priv, 0xFF, 0xFF);
1934
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 return 0;
1936
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001937irq_fail:
Anton Vorontsove69edd22009-10-12 06:00:30 +00001938 free_skb_resources(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939 return err;
1940}
1941
1942/* Called when something needs to use the ethernet device */
1943/* Returns 0 for success. */
1944static int gfar_enet_open(struct net_device *dev)
1945{
Li Yang94e8cc32007-10-12 21:53:51 +08001946 struct gfar_private *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947 int err;
1948
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001949 enable_napi(priv);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001950
Andy Fleming0fd56bb2009-02-04 16:43:16 -08001951 skb_queue_head_init(&priv->rx_recycle);
1952
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953 /* Initialize a bunch of registers */
1954 init_registers(dev);
1955
1956 gfar_set_mac_address(dev);
1957
1958 err = init_phy(dev);
1959
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00001960 if (err) {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001961 disable_napi(priv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962 return err;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001963 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964
1965 err = startup_gfar(dev);
Anton Vorontsovdb0e8e32007-10-17 23:57:46 +04001966 if (err) {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00001967 disable_napi(priv);
Anton Vorontsovdb0e8e32007-10-17 23:57:46 +04001968 return err;
1969 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00001971 netif_tx_start_all_queues(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972
Anton Vorontsov2884e5c2009-02-01 00:52:34 -08001973 device_set_wakeup_enable(&dev->dev, priv->wol_en);
1974
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975 return err;
1976}
1977
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07001978static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb)
Kumar Gala0bbaf062005-06-20 10:54:21 -05001979{
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07001980 struct txfcb *fcb = (struct txfcb *)skb_push(skb, GMAC_FCB_LEN);
Kumar Gala6c31d552009-04-28 08:04:10 -07001981
1982 memset(fcb, 0, GMAC_FCB_LEN);
Kumar Gala0bbaf062005-06-20 10:54:21 -05001983
Kumar Gala0bbaf062005-06-20 10:54:21 -05001984 return fcb;
1985}
1986
1987static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb)
1988{
Andy Fleming7f7f5312005-11-11 12:38:59 -06001989 u8 flags = 0;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001990
1991 /* If we're here, it's a IP packet with a TCP or UDP
1992 * payload. We set it to checksum, using a pseudo-header
1993 * we provide
1994 */
Andy Fleming7f7f5312005-11-11 12:38:59 -06001995 flags = TXFCB_DEFAULT;
Kumar Gala0bbaf062005-06-20 10:54:21 -05001996
Andy Fleming7f7f5312005-11-11 12:38:59 -06001997 /* Tell the controller what the protocol is */
1998 /* And provide the already calculated phcs */
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -07001999 if (ip_hdr(skb)->protocol == IPPROTO_UDP) {
Andy Fleming7f7f5312005-11-11 12:38:59 -06002000 flags |= TXFCB_UDP;
Arnaldo Carvalho de Melo4bedb452007-03-13 14:28:48 -03002001 fcb->phcs = udp_hdr(skb)->check;
Andy Fleming7f7f5312005-11-11 12:38:59 -06002002 } else
Kumar Gala8da32de2007-06-29 00:12:04 -05002003 fcb->phcs = tcp_hdr(skb)->check;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002004
2005 /* l3os is the distance between the start of the
2006 * frame (skb->data) and the start of the IP hdr.
2007 * l4os is the distance between the start of the
2008 * l3 hdr and the l4 hdr */
Arnaldo Carvalho de Melobbe735e2007-03-10 22:16:10 -03002009 fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN);
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -03002010 fcb->l4os = skb_network_header_len(skb);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002011
Andy Fleming7f7f5312005-11-11 12:38:59 -06002012 fcb->flags = flags;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002013}
2014
Andy Fleming7f7f5312005-11-11 12:38:59 -06002015void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb)
Kumar Gala0bbaf062005-06-20 10:54:21 -05002016{
Andy Fleming7f7f5312005-11-11 12:38:59 -06002017 fcb->flags |= TXFCB_VLN;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002018 fcb->vlctl = vlan_tx_tag_get(skb);
2019}
2020
Dai Haruki4669bc92008-12-17 16:51:04 -08002021static inline struct txbd8 *skip_txbd(struct txbd8 *bdp, int stride,
2022 struct txbd8 *base, int ring_size)
2023{
2024 struct txbd8 *new_bd = bdp + stride;
2025
2026 return (new_bd >= (base + ring_size)) ? (new_bd - ring_size) : new_bd;
2027}
2028
2029static inline struct txbd8 *next_txbd(struct txbd8 *bdp, struct txbd8 *base,
2030 int ring_size)
2031{
2032 return skip_txbd(bdp, 1, base, ring_size);
2033}
2034
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035/* This is called by the kernel when a frame is ready for transmission. */
2036/* It is pointed to by the dev->hard_start_xmit function pointer */
2037static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
2038{
2039 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002040 struct gfar_priv_tx_q *tx_queue = NULL;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002041 struct netdev_queue *txq;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002042 struct gfar __iomem *regs = NULL;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002043 struct txfcb *fcb = NULL;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002044 struct txbd8 *txbdp, *txbdp_start, *base, *txbdp_tstamp = NULL;
Dai Haruki5a5efed2008-12-16 15:34:50 -08002045 u32 lstatus;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002046 int i, rq = 0, do_tstamp = 0;
Dai Haruki4669bc92008-12-17 16:51:04 -08002047 u32 bufaddr;
Andy Flemingfef61082006-04-20 16:44:29 -05002048 unsigned long flags;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002049 unsigned int nr_frags, nr_txbds, length;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002050
Anton Vorontsovdeb90ea2010-06-30 06:39:13 +00002051 /*
2052 * TOE=1 frames larger than 2500 bytes may see excess delays
2053 * before start of transmission.
2054 */
2055 if (unlikely(gfar_has_errata(priv, GFAR_ERRATA_76) &&
2056 skb->ip_summed == CHECKSUM_PARTIAL &&
2057 skb->len > 2500)) {
2058 int ret;
2059
2060 ret = skb_checksum_help(skb);
2061 if (ret)
2062 return ret;
2063 }
2064
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002065 rq = skb->queue_mapping;
2066 tx_queue = priv->tx_queue[rq];
2067 txq = netdev_get_tx_queue(dev, rq);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002068 base = tx_queue->tx_bd_base;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002069 regs = tx_queue->grp->regs;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002070
2071 /* check if time stamp should be generated */
Oliver Hartkopp2244d072010-08-17 08:59:14 +00002072 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
2073 priv->hwts_tx_en))
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002074 do_tstamp = 1;
Dai Haruki4669bc92008-12-17 16:51:04 -08002075
Li Yang5b28bea2009-03-27 15:54:30 -07002076 /* make space for additional header when fcb is needed */
2077 if (((skb->ip_summed == CHECKSUM_PARTIAL) ||
Jesse Grosseab6d182010-10-20 13:56:03 +00002078 vlan_tx_tag_present(skb) ||
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002079 unlikely(do_tstamp)) &&
Li Yang5b28bea2009-03-27 15:54:30 -07002080 (skb_headroom(skb) < GMAC_FCB_LEN)) {
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07002081 struct sk_buff *skb_new;
2082
2083 skb_new = skb_realloc_headroom(skb, GMAC_FCB_LEN);
2084 if (!skb_new) {
2085 dev->stats.tx_errors++;
David S. Millerbd14ba82009-03-27 01:10:58 -07002086 kfree_skb(skb);
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07002087 return NETDEV_TX_OK;
2088 }
2089 kfree_skb(skb);
2090 skb = skb_new;
2091 }
2092
Dai Haruki4669bc92008-12-17 16:51:04 -08002093 /* total number of fragments in the SKB */
2094 nr_frags = skb_shinfo(skb)->nr_frags;
2095
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002096 /* calculate the required number of TxBDs for this skb */
2097 if (unlikely(do_tstamp))
2098 nr_txbds = nr_frags + 2;
2099 else
2100 nr_txbds = nr_frags + 1;
2101
Dai Haruki4669bc92008-12-17 16:51:04 -08002102 /* check if there is space to queue this packet */
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002103 if (nr_txbds > tx_queue->num_txbdfree) {
Dai Haruki4669bc92008-12-17 16:51:04 -08002104 /* no space, stop the queue */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002105 netif_tx_stop_queue(txq);
Dai Haruki4669bc92008-12-17 16:51:04 -08002106 dev->stats.tx_fifo_errors++;
Dai Haruki4669bc92008-12-17 16:51:04 -08002107 return NETDEV_TX_BUSY;
2108 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109
2110 /* Update transmit stats */
Eric Dumazet1ac9ad12011-01-12 12:13:14 +00002111 tx_queue->stats.tx_bytes += skb->len;
2112 tx_queue->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002113
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002114 txbdp = txbdp_start = tx_queue->cur_tx;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002115 lstatus = txbdp->lstatus;
2116
2117 /* Time stamp insertion requires one additional TxBD */
2118 if (unlikely(do_tstamp))
2119 txbdp_tstamp = txbdp = next_txbd(txbdp, base,
2120 tx_queue->tx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121
Dai Haruki4669bc92008-12-17 16:51:04 -08002122 if (nr_frags == 0) {
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002123 if (unlikely(do_tstamp))
2124 txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_LAST |
2125 TXBD_INTERRUPT);
2126 else
2127 lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
Dai Haruki4669bc92008-12-17 16:51:04 -08002128 } else {
2129 /* Place the fragment addresses and lengths into the TxBDs */
2130 for (i = 0; i < nr_frags; i++) {
2131 /* Point at the next BD, wrapping as needed */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002132 txbdp = next_txbd(txbdp, base, tx_queue->tx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133
Dai Haruki4669bc92008-12-17 16:51:04 -08002134 length = skb_shinfo(skb)->frags[i].size;
2135
2136 lstatus = txbdp->lstatus | length |
2137 BD_LFLAG(TXBD_READY);
2138
2139 /* Handle the last BD specially */
2140 if (i == nr_frags - 1)
2141 lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
2142
Kumar Gala48268572009-03-18 23:28:22 -07002143 bufaddr = dma_map_page(&priv->ofdev->dev,
Dai Haruki4669bc92008-12-17 16:51:04 -08002144 skb_shinfo(skb)->frags[i].page,
2145 skb_shinfo(skb)->frags[i].page_offset,
2146 length,
2147 DMA_TO_DEVICE);
2148
2149 /* set the TxBD length and buffer pointer */
2150 txbdp->bufPtr = bufaddr;
2151 txbdp->lstatus = lstatus;
2152 }
2153
2154 lstatus = txbdp_start->lstatus;
2155 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156
Kumar Gala0bbaf062005-06-20 10:54:21 -05002157 /* Set up checksumming */
Dai Haruki12dea572008-12-16 15:30:20 -08002158 if (CHECKSUM_PARTIAL == skb->ip_summed) {
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07002159 fcb = gfar_add_fcb(skb);
Alex Dubov4363c2f2011-03-16 17:57:13 +00002160 /* as specified by errata */
2161 if (unlikely(gfar_has_errata(priv, GFAR_ERRATA_12)
2162 && ((unsigned long)fcb % 0x20) > 0x18)) {
2163 __skb_pull(skb, GMAC_FCB_LEN);
2164 skb_checksum_help(skb);
2165 } else {
2166 lstatus |= BD_LFLAG(TXBD_TOE);
2167 gfar_tx_checksum(skb, fcb);
2168 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05002169 }
2170
Jesse Grosseab6d182010-10-20 13:56:03 +00002171 if (vlan_tx_tag_present(skb)) {
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07002172 if (unlikely(NULL == fcb)) {
2173 fcb = gfar_add_fcb(skb);
Dai Haruki5a5efed2008-12-16 15:34:50 -08002174 lstatus |= BD_LFLAG(TXBD_TOE);
Andy Fleming7f7f5312005-11-11 12:38:59 -06002175 }
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07002176
2177 gfar_tx_vlan(skb, fcb);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002178 }
2179
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002180 /* Setup tx hardware time stamping if requested */
2181 if (unlikely(do_tstamp)) {
Oliver Hartkopp2244d072010-08-17 08:59:14 +00002182 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002183 if (fcb == NULL)
2184 fcb = gfar_add_fcb(skb);
2185 fcb->ptp = 1;
2186 lstatus |= BD_LFLAG(TXBD_TOE);
2187 }
2188
Kumar Gala48268572009-03-18 23:28:22 -07002189 txbdp_start->bufPtr = dma_map_single(&priv->ofdev->dev, skb->data,
Dai Haruki4669bc92008-12-17 16:51:04 -08002190 skb_headlen(skb), DMA_TO_DEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002192 /*
2193 * If time stamping is requested one additional TxBD must be set up. The
2194 * first TxBD points to the FCB and must have a data length of
2195 * GMAC_FCB_LEN. The second TxBD points to the actual frame data with
2196 * the full frame length.
2197 */
2198 if (unlikely(do_tstamp)) {
2199 txbdp_tstamp->bufPtr = txbdp_start->bufPtr + GMAC_FCB_LEN;
2200 txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_READY) |
2201 (skb_headlen(skb) - GMAC_FCB_LEN);
2202 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | GMAC_FCB_LEN;
2203 } else {
2204 lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb);
2205 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206
Dai Haruki4669bc92008-12-17 16:51:04 -08002207 /*
Anton Vorontsova3bc1f12009-11-10 14:11:10 +00002208 * We can work in parallel with gfar_clean_tx_ring(), except
2209 * when modifying num_txbdfree. Note that we didn't grab the lock
2210 * when we were reading the num_txbdfree and checking for available
2211 * space, that's because outside of this function it can only grow,
2212 * and once we've got needed space, it cannot suddenly disappear.
2213 *
2214 * The lock also protects us from gfar_error(), which can modify
2215 * regs->tstat and thus retrigger the transfers, which is why we
2216 * also must grab the lock before setting ready bit for the first
2217 * to be transmitted BD.
2218 */
2219 spin_lock_irqsave(&tx_queue->txlock, flags);
2220
2221 /*
Dai Haruki4669bc92008-12-17 16:51:04 -08002222 * The powerpc-specific eieio() is used, as wmb() has too strong
Scott Wood3b6330c2007-05-16 15:06:59 -05002223 * semantics (it requires synchronization between cacheable and
2224 * uncacheable mappings, which eieio doesn't provide and which we
2225 * don't need), thus requiring a more expensive sync instruction. At
2226 * some point, the set of architecture-independent barrier functions
2227 * should be expanded to include weaker barriers.
2228 */
Scott Wood3b6330c2007-05-16 15:06:59 -05002229 eieio();
Andy Fleming7f7f5312005-11-11 12:38:59 -06002230
Dai Haruki4669bc92008-12-17 16:51:04 -08002231 txbdp_start->lstatus = lstatus;
2232
Anton Vorontsov0eddba52010-03-03 08:18:58 +00002233 eieio(); /* force lstatus write before tx_skbuff */
2234
2235 tx_queue->tx_skbuff[tx_queue->skb_curtx] = skb;
2236
Dai Haruki4669bc92008-12-17 16:51:04 -08002237 /* Update the current skb pointer to the next entry we will use
2238 * (wrapping if necessary) */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002239 tx_queue->skb_curtx = (tx_queue->skb_curtx + 1) &
2240 TX_RING_MOD_MASK(tx_queue->tx_ring_size);
Dai Haruki4669bc92008-12-17 16:51:04 -08002241
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002242 tx_queue->cur_tx = next_txbd(txbdp, base, tx_queue->tx_ring_size);
Dai Haruki4669bc92008-12-17 16:51:04 -08002243
2244 /* reduce TxBD free count */
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002245 tx_queue->num_txbdfree -= (nr_txbds);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246
2247 /* If the next BD still needs to be cleaned up, then the bds
2248 are full. We need to tell the kernel to stop sending us stuff. */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002249 if (!tx_queue->num_txbdfree) {
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002250 netif_tx_stop_queue(txq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251
Jeff Garzik09f75cd2007-10-03 17:41:50 -07002252 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002253 }
2254
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255 /* Tell the DMA to go go go */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002256 gfar_write(&regs->tstat, TSTAT_CLEAR_THALT >> tx_queue->qindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002257
2258 /* Unlock priv */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002259 spin_unlock_irqrestore(&tx_queue->txlock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260
Stephen Hemminger54dc79f2009-03-27 00:38:45 -07002261 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002262}
2263
2264/* Stops the kernel queue, and halts the controller */
2265static int gfar_close(struct net_device *dev)
2266{
2267 struct gfar_private *priv = netdev_priv(dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002268
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002269 disable_napi(priv);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002270
Sebastian Siewiorab939902008-08-19 21:12:45 +02002271 cancel_work_sync(&priv->reset_task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002272 stop_gfar(dev);
2273
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002274 /* Disconnect from the PHY */
2275 phy_disconnect(priv->phydev);
2276 priv->phydev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002278 netif_tx_stop_all_queues(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002279
2280 return 0;
2281}
2282
Linus Torvalds1da177e2005-04-16 15:20:36 -07002283/* Changes the mac address if the controller is not running. */
Andy Flemingf162b9d2008-05-02 13:00:30 -05002284static int gfar_set_mac_address(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285{
Andy Fleming7f7f5312005-11-11 12:38:59 -06002286 gfar_set_mac_for_addr(dev, 0, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002287
2288 return 0;
2289}
2290
Sebastian Pöhnf3dc1582011-07-15 16:00:20 -07002291/* Check if rx parser should be activated */
2292void gfar_check_rx_parser_mode(struct gfar_private *priv)
2293{
2294 struct gfar __iomem *regs;
2295 u32 tempval;
2296
2297 regs = priv->gfargrp[0].regs;
2298
2299 tempval = gfar_read(&regs->rctrl);
2300 /* If parse is no longer required, then disable parser */
2301 if (tempval & RCTRL_REQ_PARSER)
2302 tempval |= RCTRL_PRSDEP_INIT;
2303 else
2304 tempval &= ~RCTRL_PRSDEP_INIT;
2305 gfar_write(&regs->rctrl, tempval);
2306}
2307
Kumar Gala0bbaf062005-06-20 10:54:21 -05002308/* Enables and disables VLAN insertion/extraction */
Jiri Pirko87c288c2011-07-20 04:54:19 +00002309void gfar_vlan_mode(struct net_device *dev, u32 features)
Kumar Gala0bbaf062005-06-20 10:54:21 -05002310{
2311 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002312 struct gfar __iomem *regs = NULL;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002313 unsigned long flags;
2314 u32 tempval;
2315
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002316 regs = priv->gfargrp[0].regs;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002317 local_irq_save(flags);
2318 lock_rx_qs(priv);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002319
Jiri Pirko87c288c2011-07-20 04:54:19 +00002320 if (features & NETIF_F_HW_VLAN_TX) {
Kumar Gala0bbaf062005-06-20 10:54:21 -05002321 /* Enable VLAN tag insertion */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002322 tempval = gfar_read(&regs->tctrl);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002323 tempval |= TCTRL_VLINS;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002324 gfar_write(&regs->tctrl, tempval);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002325 } else {
2326 /* Disable VLAN tag insertion */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002327 tempval = gfar_read(&regs->tctrl);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002328 tempval &= ~TCTRL_VLINS;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002329 gfar_write(&regs->tctrl, tempval);
Jiri Pirko87c288c2011-07-20 04:54:19 +00002330 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05002331
Jiri Pirko87c288c2011-07-20 04:54:19 +00002332 if (features & NETIF_F_HW_VLAN_RX) {
2333 /* Enable VLAN tag extraction */
2334 tempval = gfar_read(&regs->rctrl);
2335 tempval |= (RCTRL_VLEX | RCTRL_PRSDEP_INIT);
2336 gfar_write(&regs->rctrl, tempval);
2337 } else {
Kumar Gala0bbaf062005-06-20 10:54:21 -05002338 /* Disable VLAN tag extraction */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002339 tempval = gfar_read(&regs->rctrl);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002340 tempval &= ~RCTRL_VLEX;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002341 gfar_write(&regs->rctrl, tempval);
Sebastian Pöhnf3dc1582011-07-15 16:00:20 -07002342
2343 gfar_check_rx_parser_mode(priv);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002344 }
2345
Dai Haruki77ecaf22008-12-16 15:30:48 -08002346 gfar_change_mtu(dev, dev->mtu);
2347
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002348 unlock_rx_qs(priv);
2349 local_irq_restore(flags);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002350}
2351
Linus Torvalds1da177e2005-04-16 15:20:36 -07002352static int gfar_change_mtu(struct net_device *dev, int new_mtu)
2353{
2354 int tempsize, tempval;
2355 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002356 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002357 int oldsize = priv->rx_buffer_size;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002358 int frame_size = new_mtu + ETH_HLEN;
2359
Jiri Pirko87c288c2011-07-20 04:54:19 +00002360 if (gfar_is_vlan_on(priv))
Dai Harukifaa89572008-03-24 10:53:26 -05002361 frame_size += VLAN_HLEN;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002362
Linus Torvalds1da177e2005-04-16 15:20:36 -07002363 if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) {
Joe Perches59deab22011-06-14 08:57:47 +00002364 netif_err(priv, drv, dev, "Invalid MTU setting\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365 return -EINVAL;
2366 }
2367
Dai Haruki77ecaf22008-12-16 15:30:48 -08002368 if (gfar_uses_fcb(priv))
2369 frame_size += GMAC_FCB_LEN;
2370
2371 frame_size += priv->padding;
2372
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373 tempsize =
2374 (frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) +
2375 INCREMENTAL_BUFFER_SIZE;
2376
2377 /* Only stop and start the controller if it isn't already
Andy Fleming7f7f5312005-11-11 12:38:59 -06002378 * stopped, and we changed something */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379 if ((oldsize != tempsize) && (dev->flags & IFF_UP))
2380 stop_gfar(dev);
2381
2382 priv->rx_buffer_size = tempsize;
2383
2384 dev->mtu = new_mtu;
2385
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002386 gfar_write(&regs->mrblr, priv->rx_buffer_size);
2387 gfar_write(&regs->maxfrm, priv->rx_buffer_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388
2389 /* If the mtu is larger than the max size for standard
2390 * ethernet frames (ie, a jumbo frame), then set maccfg2
2391 * to allow huge frames, and to check the length */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002392 tempval = gfar_read(&regs->maccfg2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393
Anton Vorontsov7d350972010-06-30 06:39:12 +00002394 if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE ||
2395 gfar_has_errata(priv, GFAR_ERRATA_74))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396 tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
2397 else
2398 tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
2399
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002400 gfar_write(&regs->maccfg2, tempval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002401
2402 if ((oldsize != tempsize) && (dev->flags & IFF_UP))
2403 startup_gfar(dev);
2404
2405 return 0;
2406}
2407
Sebastian Siewiorab939902008-08-19 21:12:45 +02002408/* gfar_reset_task gets scheduled when a packet has not been
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409 * transmitted after a set amount of time.
2410 * For now, assume that clearing out all the structures, and
Sebastian Siewiorab939902008-08-19 21:12:45 +02002411 * starting over will fix the problem.
2412 */
2413static void gfar_reset_task(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414{
Sebastian Siewiorab939902008-08-19 21:12:45 +02002415 struct gfar_private *priv = container_of(work, struct gfar_private,
2416 reset_task);
Kumar Gala48268572009-03-18 23:28:22 -07002417 struct net_device *dev = priv->ndev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418
2419 if (dev->flags & IFF_UP) {
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002420 netif_tx_stop_all_queues(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002421 stop_gfar(dev);
2422 startup_gfar(dev);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002423 netif_tx_start_all_queues(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002424 }
2425
David S. Miller263ba322008-07-15 03:47:41 -07002426 netif_tx_schedule_all(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427}
2428
Sebastian Siewiorab939902008-08-19 21:12:45 +02002429static void gfar_timeout(struct net_device *dev)
2430{
2431 struct gfar_private *priv = netdev_priv(dev);
2432
2433 dev->stats.tx_errors++;
2434 schedule_work(&priv->reset_task);
2435}
2436
Eran Libertyacbc0f02010-07-07 15:54:54 -07002437static void gfar_align_skb(struct sk_buff *skb)
2438{
2439 /* We need the data buffer to be aligned properly. We will reserve
2440 * as many bytes as needed to align the data properly
2441 */
2442 skb_reserve(skb, RXBUF_ALIGNMENT -
2443 (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1)));
2444}
2445
Linus Torvalds1da177e2005-04-16 15:20:36 -07002446/* Interrupt Handler for Transmit complete */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002447static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002448{
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002449 struct net_device *dev = tx_queue->dev;
Dai Harukid080cd62008-04-09 19:37:51 -05002450 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002451 struct gfar_priv_rx_q *rx_queue = NULL;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002452 struct txbd8 *bdp, *next = NULL;
Dai Haruki4669bc92008-12-17 16:51:04 -08002453 struct txbd8 *lbdp = NULL;
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002454 struct txbd8 *base = tx_queue->tx_bd_base;
Dai Haruki4669bc92008-12-17 16:51:04 -08002455 struct sk_buff *skb;
2456 int skb_dirtytx;
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002457 int tx_ring_size = tx_queue->tx_ring_size;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002458 int frags = 0, nr_txbds = 0;
Dai Haruki4669bc92008-12-17 16:51:04 -08002459 int i;
Dai Harukid080cd62008-04-09 19:37:51 -05002460 int howmany = 0;
Dai Haruki4669bc92008-12-17 16:51:04 -08002461 u32 lstatus;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002462 size_t buflen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002463
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002464 rx_queue = priv->rx_queue[tx_queue->qindex];
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002465 bdp = tx_queue->dirty_tx;
2466 skb_dirtytx = tx_queue->skb_dirtytx;
Dai Haruki4669bc92008-12-17 16:51:04 -08002467
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002468 while ((skb = tx_queue->tx_skbuff[skb_dirtytx])) {
Anton Vorontsova3bc1f12009-11-10 14:11:10 +00002469 unsigned long flags;
2470
Dai Haruki4669bc92008-12-17 16:51:04 -08002471 frags = skb_shinfo(skb)->nr_frags;
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002472
2473 /*
2474 * When time stamping, one additional TxBD must be freed.
2475 * Also, we need to dma_unmap_single() the TxPAL.
2476 */
Oliver Hartkopp2244d072010-08-17 08:59:14 +00002477 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS))
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002478 nr_txbds = frags + 2;
2479 else
2480 nr_txbds = frags + 1;
2481
2482 lbdp = skip_txbd(bdp, nr_txbds - 1, base, tx_ring_size);
Dai Haruki4669bc92008-12-17 16:51:04 -08002483
2484 lstatus = lbdp->lstatus;
2485
2486 /* Only clean completed frames */
2487 if ((lstatus & BD_LFLAG(TXBD_READY)) &&
2488 (lstatus & BD_LENGTH_MASK))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002489 break;
2490
Oliver Hartkopp2244d072010-08-17 08:59:14 +00002491 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002492 next = next_txbd(bdp, base, tx_ring_size);
2493 buflen = next->length + GMAC_FCB_LEN;
2494 } else
2495 buflen = bdp->length;
2496
2497 dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr,
2498 buflen, DMA_TO_DEVICE);
2499
Oliver Hartkopp2244d072010-08-17 08:59:14 +00002500 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002501 struct skb_shared_hwtstamps shhwtstamps;
2502 u64 *ns = (u64*) (((u32)skb->data + 0x10) & ~0x7);
2503 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
2504 shhwtstamps.hwtstamp = ns_to_ktime(*ns);
2505 skb_tstamp_tx(skb, &shhwtstamps);
2506 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2507 bdp = next;
2508 }
Dai Haruki4669bc92008-12-17 16:51:04 -08002509
2510 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2511 bdp = next_txbd(bdp, base, tx_ring_size);
2512
2513 for (i = 0; i < frags; i++) {
Kumar Gala48268572009-03-18 23:28:22 -07002514 dma_unmap_page(&priv->ofdev->dev,
Dai Haruki4669bc92008-12-17 16:51:04 -08002515 bdp->bufPtr,
2516 bdp->length,
2517 DMA_TO_DEVICE);
2518 bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
2519 bdp = next_txbd(bdp, base, tx_ring_size);
2520 }
2521
Andy Fleming0fd56bb2009-02-04 16:43:16 -08002522 /*
2523 * If there's room in the queue (limit it to rx_buffer_size)
2524 * we add this skb back into the pool, if it's the right size
2525 */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002526 if (skb_queue_len(&priv->rx_recycle) < rx_queue->rx_ring_size &&
Andy Fleming0fd56bb2009-02-04 16:43:16 -08002527 skb_recycle_check(skb, priv->rx_buffer_size +
Eran Libertyacbc0f02010-07-07 15:54:54 -07002528 RXBUF_ALIGNMENT)) {
2529 gfar_align_skb(skb);
Jarek Poplawskicd0ea242010-10-19 00:06:36 +00002530 skb_queue_head(&priv->rx_recycle, skb);
Eran Libertyacbc0f02010-07-07 15:54:54 -07002531 } else
Andy Fleming0fd56bb2009-02-04 16:43:16 -08002532 dev_kfree_skb_any(skb);
2533
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002534 tx_queue->tx_skbuff[skb_dirtytx] = NULL;
Dai Haruki4669bc92008-12-17 16:51:04 -08002535
2536 skb_dirtytx = (skb_dirtytx + 1) &
2537 TX_RING_MOD_MASK(tx_ring_size);
2538
Dai Harukid080cd62008-04-09 19:37:51 -05002539 howmany++;
Anton Vorontsova3bc1f12009-11-10 14:11:10 +00002540 spin_lock_irqsave(&tx_queue->txlock, flags);
Manfred Rudigierf0ee7ac2010-04-08 23:10:35 +00002541 tx_queue->num_txbdfree += nr_txbds;
Anton Vorontsova3bc1f12009-11-10 14:11:10 +00002542 spin_unlock_irqrestore(&tx_queue->txlock, flags);
Dai Haruki4669bc92008-12-17 16:51:04 -08002543 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002544
Dai Haruki4669bc92008-12-17 16:51:04 -08002545 /* If we freed a buffer, we can restart transmission, if necessary */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002546 if (__netif_subqueue_stopped(dev, tx_queue->qindex) && tx_queue->num_txbdfree)
2547 netif_wake_subqueue(dev, tx_queue->qindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002548
Dai Haruki4669bc92008-12-17 16:51:04 -08002549 /* Update dirty indicators */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002550 tx_queue->skb_dirtytx = skb_dirtytx;
2551 tx_queue->dirty_tx = bdp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552
Dai Harukid080cd62008-04-09 19:37:51 -05002553 return howmany;
2554}
2555
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002556static void gfar_schedule_cleanup(struct gfar_priv_grp *gfargrp)
Dai Haruki8c7396a2008-12-17 16:52:00 -08002557{
Anton Vorontsova6d0b912009-01-12 21:57:34 -08002558 unsigned long flags;
2559
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002560 spin_lock_irqsave(&gfargrp->grplock, flags);
2561 if (napi_schedule_prep(&gfargrp->napi)) {
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002562 gfar_write(&gfargrp->regs->imask, IMASK_RTX_DISABLED);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002563 __napi_schedule(&gfargrp->napi);
Jarek Poplawski8707bdd2009-02-09 14:59:30 -08002564 } else {
2565 /*
2566 * Clear IEVENT, so interrupts aren't called again
2567 * because of the packets that have already arrived.
2568 */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002569 gfar_write(&gfargrp->regs->ievent, IEVENT_RTX_MASK);
Dai Haruki8c7396a2008-12-17 16:52:00 -08002570 }
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002571 spin_unlock_irqrestore(&gfargrp->grplock, flags);
Anton Vorontsova6d0b912009-01-12 21:57:34 -08002572
Dai Haruki8c7396a2008-12-17 16:52:00 -08002573}
2574
Dai Harukid080cd62008-04-09 19:37:51 -05002575/* Interrupt Handler for Transmit complete */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002576static irqreturn_t gfar_transmit(int irq, void *grp_id)
Dai Harukid080cd62008-04-09 19:37:51 -05002577{
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002578 gfar_schedule_cleanup((struct gfar_priv_grp *)grp_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002579 return IRQ_HANDLED;
2580}
2581
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002582static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
Andy Fleming815b97c2008-04-22 17:18:29 -05002583 struct sk_buff *skb)
2584{
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002585 struct net_device *dev = rx_queue->dev;
Andy Fleming815b97c2008-04-22 17:18:29 -05002586 struct gfar_private *priv = netdev_priv(dev);
Anton Vorontsov8a102fe2009-10-12 06:00:37 +00002587 dma_addr_t buf;
Andy Fleming815b97c2008-04-22 17:18:29 -05002588
Anton Vorontsov8a102fe2009-10-12 06:00:37 +00002589 buf = dma_map_single(&priv->ofdev->dev, skb->data,
2590 priv->rx_buffer_size, DMA_FROM_DEVICE);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002591 gfar_init_rxbdp(rx_queue, bdp, buf);
Andy Fleming815b97c2008-04-22 17:18:29 -05002592}
2593
Eran Libertyacbc0f02010-07-07 15:54:54 -07002594static struct sk_buff * gfar_alloc_skb(struct net_device *dev)
2595{
2596 struct gfar_private *priv = netdev_priv(dev);
2597 struct sk_buff *skb = NULL;
2598
2599 skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT);
2600 if (!skb)
2601 return NULL;
2602
2603 gfar_align_skb(skb);
2604
2605 return skb;
2606}
Andy Fleming815b97c2008-04-22 17:18:29 -05002607
2608struct sk_buff * gfar_new_skb(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002609{
2610 struct gfar_private *priv = netdev_priv(dev);
2611 struct sk_buff *skb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002612
Jarek Poplawskicd0ea242010-10-19 00:06:36 +00002613 skb = skb_dequeue(&priv->rx_recycle);
Andy Fleming0fd56bb2009-02-04 16:43:16 -08002614 if (!skb)
Eran Libertyacbc0f02010-07-07 15:54:54 -07002615 skb = gfar_alloc_skb(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002616
Linus Torvalds1da177e2005-04-16 15:20:36 -07002617 return skb;
2618}
2619
Li Yang298e1a92007-10-16 14:18:13 +08002620static inline void count_errors(unsigned short status, struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002621{
Li Yang298e1a92007-10-16 14:18:13 +08002622 struct gfar_private *priv = netdev_priv(dev);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07002623 struct net_device_stats *stats = &dev->stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002624 struct gfar_extra_stats *estats = &priv->extra_stats;
2625
2626 /* If the packet was truncated, none of the other errors
2627 * matter */
2628 if (status & RXBD_TRUNCATED) {
2629 stats->rx_length_errors++;
2630
2631 estats->rx_trunc++;
2632
2633 return;
2634 }
2635 /* Count the errors, if there were any */
2636 if (status & (RXBD_LARGE | RXBD_SHORT)) {
2637 stats->rx_length_errors++;
2638
2639 if (status & RXBD_LARGE)
2640 estats->rx_large++;
2641 else
2642 estats->rx_short++;
2643 }
2644 if (status & RXBD_NONOCTET) {
2645 stats->rx_frame_errors++;
2646 estats->rx_nonoctet++;
2647 }
2648 if (status & RXBD_CRCERR) {
2649 estats->rx_crcerr++;
2650 stats->rx_crc_errors++;
2651 }
2652 if (status & RXBD_OVERRUN) {
2653 estats->rx_overrun++;
2654 stats->rx_crc_errors++;
2655 }
2656}
2657
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002658irqreturn_t gfar_receive(int irq, void *grp_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002659{
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002660 gfar_schedule_cleanup((struct gfar_priv_grp *)grp_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002661 return IRQ_HANDLED;
2662}
2663
Kumar Gala0bbaf062005-06-20 10:54:21 -05002664static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb)
2665{
2666 /* If valid headers were found, and valid sums
2667 * were verified, then we tell the kernel that no
2668 * checksumming is necessary. Otherwise, it is */
Andy Fleming7f7f5312005-11-11 12:38:59 -06002669 if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU))
Kumar Gala0bbaf062005-06-20 10:54:21 -05002670 skb->ip_summed = CHECKSUM_UNNECESSARY;
2671 else
Eric Dumazetbc8acf22010-09-02 13:07:41 -07002672 skb_checksum_none_assert(skb);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002673}
2674
2675
Linus Torvalds1da177e2005-04-16 15:20:36 -07002676/* gfar_process_frame() -- handle one incoming packet if skb
2677 * isn't NULL. */
2678static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
Dai Haruki2c2db482008-12-16 15:31:15 -08002679 int amount_pull)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002680{
2681 struct gfar_private *priv = netdev_priv(dev);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002682 struct rxfcb *fcb = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002683
Dai Haruki2c2db482008-12-16 15:31:15 -08002684 int ret;
Kumar Gala0bbaf062005-06-20 10:54:21 -05002685
Dai Haruki2c2db482008-12-16 15:31:15 -08002686 /* fcb is at the beginning if exists */
2687 fcb = (struct rxfcb *)skb->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002688
Dai Haruki2c2db482008-12-16 15:31:15 -08002689 /* Remove the FCB from the skb */
2690 /* Remove the padded bytes, if there are any */
Sandeep Gopalpetf74dac02009-12-24 03:13:06 +00002691 if (amount_pull) {
2692 skb_record_rx_queue(skb, fcb->rq);
Dai Haruki2c2db482008-12-16 15:31:15 -08002693 skb_pull(skb, amount_pull);
Sandeep Gopalpetf74dac02009-12-24 03:13:06 +00002694 }
Kumar Gala0bbaf062005-06-20 10:54:21 -05002695
Manfred Rudigiercc772ab2010-04-08 23:10:03 +00002696 /* Get receive timestamp from the skb */
2697 if (priv->hwts_rx_en) {
2698 struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb);
2699 u64 *ns = (u64 *) skb->data;
2700 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
2701 shhwtstamps->hwtstamp = ns_to_ktime(*ns);
2702 }
2703
2704 if (priv->padding)
2705 skb_pull(skb, priv->padding);
2706
Michał Mirosław8b3afe92011-04-15 04:50:50 +00002707 if (dev->features & NETIF_F_RXCSUM)
Dai Haruki2c2db482008-12-16 15:31:15 -08002708 gfar_rx_checksum(skb, fcb);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002709
Dai Haruki2c2db482008-12-16 15:31:15 -08002710 /* Tell the skb what kind of packet this is */
2711 skb->protocol = eth_type_trans(skb, dev);
Kumar Gala0bbaf062005-06-20 10:54:21 -05002712
Jiri Pirko87c288c2011-07-20 04:54:19 +00002713 /* Set vlan tag */
2714 if (fcb->flags & RXFCB_VLN)
2715 __vlan_hwaccel_put_tag(skb, fcb->vlctl);
2716
Dai Haruki2c2db482008-12-16 15:31:15 -08002717 /* Send the packet up the stack */
Jiri Pirko87c288c2011-07-20 04:54:19 +00002718 ret = netif_receive_skb(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002719
Dai Haruki2c2db482008-12-16 15:31:15 -08002720 if (NET_RX_DROP == ret)
2721 priv->extra_stats.kernel_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002722
2723 return 0;
2724}
2725
2726/* gfar_clean_rx_ring() -- Processes each frame in the rx ring
Kumar Gala0bbaf062005-06-20 10:54:21 -05002727 * until the budget/quota has been reached. Returns the number
Linus Torvalds1da177e2005-04-16 15:20:36 -07002728 * of frames handled
2729 */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002730int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002731{
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002732 struct net_device *dev = rx_queue->dev;
Andy Fleming31de1982008-12-16 15:33:40 -08002733 struct rxbd8 *bdp, *base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002734 struct sk_buff *skb;
Dai Haruki2c2db482008-12-16 15:31:15 -08002735 int pkt_len;
2736 int amount_pull;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002737 int howmany = 0;
2738 struct gfar_private *priv = netdev_priv(dev);
2739
2740 /* Get the first full descriptor */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002741 bdp = rx_queue->cur_rx;
2742 base = rx_queue->rx_bd_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002743
Manfred Rudigiercc772ab2010-04-08 23:10:03 +00002744 amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0);
Dai Haruki2c2db482008-12-16 15:31:15 -08002745
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746 while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) {
Andy Fleming815b97c2008-04-22 17:18:29 -05002747 struct sk_buff *newskb;
Scott Wood3b6330c2007-05-16 15:06:59 -05002748 rmb();
Andy Fleming815b97c2008-04-22 17:18:29 -05002749
2750 /* Add another skb for the future */
2751 newskb = gfar_new_skb(dev);
2752
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002753 skb = rx_queue->rx_skbuff[rx_queue->skb_currx];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754
Kumar Gala48268572009-03-18 23:28:22 -07002755 dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr,
Andy Fleming81183052008-11-12 10:07:11 -06002756 priv->rx_buffer_size, DMA_FROM_DEVICE);
2757
Anton Vorontsov63b88b92010-06-11 10:51:03 +00002758 if (unlikely(!(bdp->status & RXBD_ERR) &&
2759 bdp->length > priv->rx_buffer_size))
2760 bdp->status = RXBD_LARGE;
2761
Andy Fleming815b97c2008-04-22 17:18:29 -05002762 /* We drop the frame if we failed to allocate a new buffer */
2763 if (unlikely(!newskb || !(bdp->status & RXBD_LAST) ||
2764 bdp->status & RXBD_ERR)) {
2765 count_errors(bdp->status, dev);
2766
2767 if (unlikely(!newskb))
2768 newskb = skb;
Eran Libertyacbc0f02010-07-07 15:54:54 -07002769 else if (skb)
Jarek Poplawskicd0ea242010-10-19 00:06:36 +00002770 skb_queue_head(&priv->rx_recycle, skb);
Andy Fleming815b97c2008-04-22 17:18:29 -05002771 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002772 /* Increment the number of packets */
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +00002773 rx_queue->stats.rx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002774 howmany++;
2775
Dai Haruki2c2db482008-12-16 15:31:15 -08002776 if (likely(skb)) {
2777 pkt_len = bdp->length - ETH_FCS_LEN;
2778 /* Remove the FCS from the packet length */
2779 skb_put(skb, pkt_len);
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +00002780 rx_queue->stats.rx_bytes += pkt_len;
Sandeep Gopalpetf74dac02009-12-24 03:13:06 +00002781 skb_record_rx_queue(skb, rx_queue->qindex);
Dai Haruki2c2db482008-12-16 15:31:15 -08002782 gfar_process_frame(dev, skb, amount_pull);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002783
Dai Haruki2c2db482008-12-16 15:31:15 -08002784 } else {
Joe Perches59deab22011-06-14 08:57:47 +00002785 netif_warn(priv, rx_err, dev, "Missing skb!\n");
Sandeep Gopalpeta7f38042009-12-16 01:15:07 +00002786 rx_queue->stats.rx_dropped++;
Dai Haruki2c2db482008-12-16 15:31:15 -08002787 priv->extra_stats.rx_skbmissing++;
2788 }
2789
Linus Torvalds1da177e2005-04-16 15:20:36 -07002790 }
2791
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002792 rx_queue->rx_skbuff[rx_queue->skb_currx] = newskb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002793
Andy Fleming815b97c2008-04-22 17:18:29 -05002794 /* Setup the new bdp */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002795 gfar_new_rxbdp(rx_queue, bdp, newskb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002796
2797 /* Update to the next pointer */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002798 bdp = next_bd(bdp, base, rx_queue->rx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002799
2800 /* update to point at the next skb */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002801 rx_queue->skb_currx =
2802 (rx_queue->skb_currx + 1) &
2803 RX_RING_MOD_MASK(rx_queue->rx_ring_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002804 }
2805
2806 /* Update the current rxbd pointer to be the next one */
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002807 rx_queue->cur_rx = bdp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002808
Linus Torvalds1da177e2005-04-16 15:20:36 -07002809 return howmany;
2810}
2811
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002812static int gfar_poll(struct napi_struct *napi, int budget)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002813{
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002814 struct gfar_priv_grp *gfargrp = container_of(napi,
2815 struct gfar_priv_grp, napi);
2816 struct gfar_private *priv = gfargrp->priv;
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002817 struct gfar __iomem *regs = gfargrp->regs;
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00002818 struct gfar_priv_tx_q *tx_queue = NULL;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002819 struct gfar_priv_rx_q *rx_queue = NULL;
2820 int rx_cleaned = 0, budget_per_queue = 0, rx_cleaned_per_queue = 0;
Anton Vorontsov18294ad2009-11-04 12:53:00 +00002821 int tx_cleaned = 0, i, left_over_budget = budget;
2822 unsigned long serviced_queues = 0;
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002823 int num_queues = 0;
Dai Harukid080cd62008-04-09 19:37:51 -05002824
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002825 num_queues = gfargrp->num_rx_queues;
2826 budget_per_queue = budget/num_queues;
2827
Dai Haruki8c7396a2008-12-17 16:52:00 -08002828 /* Clear IEVENT, so interrupts aren't called again
2829 * because of the packets that have already arrived */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002830 gfar_write(&regs->ievent, IEVENT_RTX_MASK);
Dai Haruki8c7396a2008-12-17 16:52:00 -08002831
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002832 while (num_queues && left_over_budget) {
2833
2834 budget_per_queue = left_over_budget/num_queues;
2835 left_over_budget = 0;
2836
Akinobu Mita984b3f52010-03-05 13:41:37 -08002837 for_each_set_bit(i, &gfargrp->rx_bit_map, priv->num_rx_queues) {
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002838 if (test_bit(i, &serviced_queues))
2839 continue;
2840 rx_queue = priv->rx_queue[i];
2841 tx_queue = priv->tx_queue[rx_queue->qindex];
2842
Anton Vorontsova3bc1f12009-11-10 14:11:10 +00002843 tx_cleaned += gfar_clean_tx_ring(tx_queue);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002844 rx_cleaned_per_queue = gfar_clean_rx_ring(rx_queue,
2845 budget_per_queue);
2846 rx_cleaned += rx_cleaned_per_queue;
2847 if(rx_cleaned_per_queue < budget_per_queue) {
2848 left_over_budget = left_over_budget +
2849 (budget_per_queue - rx_cleaned_per_queue);
2850 set_bit(i, &serviced_queues);
2851 num_queues--;
2852 }
2853 }
Dai Harukid080cd62008-04-09 19:37:51 -05002854 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002855
Andy Fleming42199882008-12-17 16:52:30 -08002856 if (tx_cleaned)
2857 return budget;
2858
2859 if (rx_cleaned < budget) {
Ben Hutchings288379f2009-01-19 16:43:59 -08002860 napi_complete(napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002861
2862 /* Clear the halt bit in RSTAT */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002863 gfar_write(&regs->rstat, gfargrp->rstat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002864
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002865 gfar_write(&regs->imask, IMASK_DEFAULT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002866
2867 /* If we are coalescing interrupts, update the timer */
2868 /* Otherwise, clear it */
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002869 gfar_configure_coalescing(priv,
2870 gfargrp->rx_bit_map, gfargrp->tx_bit_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002871 }
2872
Andy Fleming42199882008-12-17 16:52:30 -08002873 return rx_cleaned;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002874}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002875
Vitaly Woolf2d71c22006-11-07 13:27:02 +03002876#ifdef CONFIG_NET_POLL_CONTROLLER
2877/*
2878 * Polling 'interrupt' - used by things like netconsole to send skbs
2879 * without having to re-enable interrupts. It's not called while
2880 * the interrupt routine is executing.
2881 */
2882static void gfar_netpoll(struct net_device *dev)
2883{
2884 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002885 int i = 0;
Vitaly Woolf2d71c22006-11-07 13:27:02 +03002886
2887 /* If the device has multiple interrupts, run tx/rx */
Andy Flemingb31a1d82008-12-16 15:29:15 -08002888 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002889 for (i = 0; i < priv->num_grps; i++) {
2890 disable_irq(priv->gfargrp[i].interruptTransmit);
2891 disable_irq(priv->gfargrp[i].interruptReceive);
2892 disable_irq(priv->gfargrp[i].interruptError);
2893 gfar_interrupt(priv->gfargrp[i].interruptTransmit,
2894 &priv->gfargrp[i]);
2895 enable_irq(priv->gfargrp[i].interruptError);
2896 enable_irq(priv->gfargrp[i].interruptReceive);
2897 enable_irq(priv->gfargrp[i].interruptTransmit);
2898 }
Vitaly Woolf2d71c22006-11-07 13:27:02 +03002899 } else {
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002900 for (i = 0; i < priv->num_grps; i++) {
2901 disable_irq(priv->gfargrp[i].interruptTransmit);
2902 gfar_interrupt(priv->gfargrp[i].interruptTransmit,
2903 &priv->gfargrp[i]);
2904 enable_irq(priv->gfargrp[i].interruptTransmit);
Anton Vorontsov43de0042009-12-09 02:52:19 -08002905 }
Vitaly Woolf2d71c22006-11-07 13:27:02 +03002906 }
2907}
2908#endif
2909
Linus Torvalds1da177e2005-04-16 15:20:36 -07002910/* The interrupt handler for devices with one interrupt */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002911static irqreturn_t gfar_interrupt(int irq, void *grp_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002912{
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002913 struct gfar_priv_grp *gfargrp = grp_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002914
2915 /* Save ievent for future reference */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002916 u32 events = gfar_read(&gfargrp->regs->ievent);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002917
Linus Torvalds1da177e2005-04-16 15:20:36 -07002918 /* Check for reception */
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002919 if (events & IEVENT_RX_MASK)
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002920 gfar_receive(irq, grp_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002921
2922 /* Check for transmit completion */
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002923 if (events & IEVENT_TX_MASK)
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002924 gfar_transmit(irq, grp_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002925
Sergei Shtylyov538cc7e2007-02-15 17:56:01 +04002926 /* Check for errors */
2927 if (events & IEVENT_ERR_MASK)
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00002928 gfar_error(irq, grp_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002929
2930 return IRQ_HANDLED;
2931}
2932
Linus Torvalds1da177e2005-04-16 15:20:36 -07002933/* Called every time the controller might need to be made
2934 * aware of new link state. The PHY code conveys this
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002935 * information through variables in the phydev structure, and this
Linus Torvalds1da177e2005-04-16 15:20:36 -07002936 * function converts those variables into the appropriate
2937 * register values, and can bring down the device if needed.
2938 */
2939static void adjust_link(struct net_device *dev)
2940{
2941 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00002942 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002943 unsigned long flags;
2944 struct phy_device *phydev = priv->phydev;
2945 int new_state = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002946
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00002947 local_irq_save(flags);
2948 lock_tx_qs(priv);
2949
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002950 if (phydev->link) {
2951 u32 tempval = gfar_read(&regs->maccfg2);
Andy Fleming7f7f5312005-11-11 12:38:59 -06002952 u32 ecntrl = gfar_read(&regs->ecntrl);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002953
Linus Torvalds1da177e2005-04-16 15:20:36 -07002954 /* Now we make sure that we can be in full duplex mode.
2955 * If not, we operate in half-duplex mode. */
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002956 if (phydev->duplex != priv->oldduplex) {
2957 new_state = 1;
2958 if (!(phydev->duplex))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002959 tempval &= ~(MACCFG2_FULL_DUPLEX);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002960 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002961 tempval |= MACCFG2_FULL_DUPLEX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002962
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002963 priv->oldduplex = phydev->duplex;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002964 }
2965
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002966 if (phydev->speed != priv->oldspeed) {
2967 new_state = 1;
2968 switch (phydev->speed) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002969 case 1000:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002970 tempval =
2971 ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII);
Li Yangf430e492009-01-06 14:08:10 -08002972
2973 ecntrl &= ~(ECNTRL_R100);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002974 break;
2975 case 100:
2976 case 10:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002977 tempval =
2978 ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII);
Andy Fleming7f7f5312005-11-11 12:38:59 -06002979
2980 /* Reduced mode distinguishes
2981 * between 10 and 100 */
2982 if (phydev->speed == SPEED_100)
2983 ecntrl |= ECNTRL_R100;
2984 else
2985 ecntrl &= ~(ECNTRL_R100);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002986 break;
2987 default:
Joe Perches59deab22011-06-14 08:57:47 +00002988 netif_warn(priv, link, dev,
2989 "Ack! Speed (%d) is not 10/100/1000!\n",
2990 phydev->speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002991 break;
2992 }
2993
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002994 priv->oldspeed = phydev->speed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002995 }
2996
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002997 gfar_write(&regs->maccfg2, tempval);
Andy Fleming7f7f5312005-11-11 12:38:59 -06002998 gfar_write(&regs->ecntrl, ecntrl);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04002999
Linus Torvalds1da177e2005-04-16 15:20:36 -07003000 if (!priv->oldlink) {
Andy Flemingbb40dcb2005-09-23 22:54:21 -04003001 new_state = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003002 priv->oldlink = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003003 }
Andy Flemingbb40dcb2005-09-23 22:54:21 -04003004 } else if (priv->oldlink) {
3005 new_state = 1;
3006 priv->oldlink = 0;
3007 priv->oldspeed = 0;
3008 priv->oldduplex = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003009 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003010
Andy Flemingbb40dcb2005-09-23 22:54:21 -04003011 if (new_state && netif_msg_link(priv))
3012 phy_print_status(phydev);
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00003013 unlock_tx_qs(priv);
3014 local_irq_restore(flags);
Andy Flemingbb40dcb2005-09-23 22:54:21 -04003015}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003016
3017/* Update the hash table based on the current list of multicast
3018 * addresses we subscribe to. Also, change the promiscuity of
3019 * the device based on the flags (this function is called
3020 * whenever dev->flags is changed */
3021static void gfar_set_multi(struct net_device *dev)
3022{
Jiri Pirko22bedad2010-04-01 21:22:57 +00003023 struct netdev_hw_addr *ha;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003024 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00003025 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003026 u32 tempval;
3027
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00003028 if (dev->flags & IFF_PROMISC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003029 /* Set RCTRL to PROM */
3030 tempval = gfar_read(&regs->rctrl);
3031 tempval |= RCTRL_PROM;
3032 gfar_write(&regs->rctrl, tempval);
3033 } else {
3034 /* Set RCTRL to not PROM */
3035 tempval = gfar_read(&regs->rctrl);
3036 tempval &= ~(RCTRL_PROM);
3037 gfar_write(&regs->rctrl, tempval);
3038 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -04003039
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +00003040 if (dev->flags & IFF_ALLMULTI) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003041 /* Set the hash to rx all multicast frames */
Kumar Gala0bbaf062005-06-20 10:54:21 -05003042 gfar_write(&regs->igaddr0, 0xffffffff);
3043 gfar_write(&regs->igaddr1, 0xffffffff);
3044 gfar_write(&regs->igaddr2, 0xffffffff);
3045 gfar_write(&regs->igaddr3, 0xffffffff);
3046 gfar_write(&regs->igaddr4, 0xffffffff);
3047 gfar_write(&regs->igaddr5, 0xffffffff);
3048 gfar_write(&regs->igaddr6, 0xffffffff);
3049 gfar_write(&regs->igaddr7, 0xffffffff);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003050 gfar_write(&regs->gaddr0, 0xffffffff);
3051 gfar_write(&regs->gaddr1, 0xffffffff);
3052 gfar_write(&regs->gaddr2, 0xffffffff);
3053 gfar_write(&regs->gaddr3, 0xffffffff);
3054 gfar_write(&regs->gaddr4, 0xffffffff);
3055 gfar_write(&regs->gaddr5, 0xffffffff);
3056 gfar_write(&regs->gaddr6, 0xffffffff);
3057 gfar_write(&regs->gaddr7, 0xffffffff);
3058 } else {
Andy Fleming7f7f5312005-11-11 12:38:59 -06003059 int em_num;
3060 int idx;
3061
Linus Torvalds1da177e2005-04-16 15:20:36 -07003062 /* zero out the hash */
Kumar Gala0bbaf062005-06-20 10:54:21 -05003063 gfar_write(&regs->igaddr0, 0x0);
3064 gfar_write(&regs->igaddr1, 0x0);
3065 gfar_write(&regs->igaddr2, 0x0);
3066 gfar_write(&regs->igaddr3, 0x0);
3067 gfar_write(&regs->igaddr4, 0x0);
3068 gfar_write(&regs->igaddr5, 0x0);
3069 gfar_write(&regs->igaddr6, 0x0);
3070 gfar_write(&regs->igaddr7, 0x0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003071 gfar_write(&regs->gaddr0, 0x0);
3072 gfar_write(&regs->gaddr1, 0x0);
3073 gfar_write(&regs->gaddr2, 0x0);
3074 gfar_write(&regs->gaddr3, 0x0);
3075 gfar_write(&regs->gaddr4, 0x0);
3076 gfar_write(&regs->gaddr5, 0x0);
3077 gfar_write(&regs->gaddr6, 0x0);
3078 gfar_write(&regs->gaddr7, 0x0);
3079
Andy Fleming7f7f5312005-11-11 12:38:59 -06003080 /* If we have extended hash tables, we need to
3081 * clear the exact match registers to prepare for
3082 * setting them */
3083 if (priv->extended_hash) {
3084 em_num = GFAR_EM_NUM + 1;
3085 gfar_clear_exact_match(dev);
3086 idx = 1;
3087 } else {
3088 idx = 0;
3089 em_num = 0;
3090 }
3091
Jiri Pirko4cd24ea2010-02-08 04:30:35 +00003092 if (netdev_mc_empty(dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003093 return;
3094
3095 /* Parse the list, and set the appropriate bits */
Jiri Pirko22bedad2010-04-01 21:22:57 +00003096 netdev_for_each_mc_addr(ha, dev) {
Andy Fleming7f7f5312005-11-11 12:38:59 -06003097 if (idx < em_num) {
Jiri Pirko22bedad2010-04-01 21:22:57 +00003098 gfar_set_mac_for_addr(dev, idx, ha->addr);
Andy Fleming7f7f5312005-11-11 12:38:59 -06003099 idx++;
3100 } else
Jiri Pirko22bedad2010-04-01 21:22:57 +00003101 gfar_set_hash_for_addr(dev, ha->addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003102 }
3103 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003104}
3105
Andy Fleming7f7f5312005-11-11 12:38:59 -06003106
3107/* Clears each of the exact match registers to zero, so they
3108 * don't interfere with normal reception */
3109static void gfar_clear_exact_match(struct net_device *dev)
3110{
3111 int idx;
Joe Perchesb6bc7652010-12-21 02:16:08 -08003112 static const u8 zero_arr[MAC_ADDR_LEN] = {0, 0, 0, 0, 0, 0};
Andy Fleming7f7f5312005-11-11 12:38:59 -06003113
3114 for(idx = 1;idx < GFAR_EM_NUM + 1;idx++)
Joe Perchesb6bc7652010-12-21 02:16:08 -08003115 gfar_set_mac_for_addr(dev, idx, zero_arr);
Andy Fleming7f7f5312005-11-11 12:38:59 -06003116}
3117
Linus Torvalds1da177e2005-04-16 15:20:36 -07003118/* Set the appropriate hash bit for the given addr */
3119/* The algorithm works like so:
3120 * 1) Take the Destination Address (ie the multicast address), and
3121 * do a CRC on it (little endian), and reverse the bits of the
3122 * result.
3123 * 2) Use the 8 most significant bits as a hash into a 256-entry
3124 * table. The table is controlled through 8 32-bit registers:
3125 * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is
3126 * gaddr7. This means that the 3 most significant bits in the
3127 * hash index which gaddr register to use, and the 5 other bits
3128 * indicate which bit (assuming an IBM numbering scheme, which
3129 * for PowerPC (tm) is usually the case) in the register holds
3130 * the entry. */
3131static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr)
3132{
3133 u32 tempval;
3134 struct gfar_private *priv = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003135 u32 result = ether_crc(MAC_ADDR_LEN, addr);
Kumar Gala0bbaf062005-06-20 10:54:21 -05003136 int width = priv->hash_width;
3137 u8 whichbit = (result >> (32 - width)) & 0x1f;
3138 u8 whichreg = result >> (32 - width + 5);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003139 u32 value = (1 << (31-whichbit));
3140
Kumar Gala0bbaf062005-06-20 10:54:21 -05003141 tempval = gfar_read(priv->hash_regs[whichreg]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003142 tempval |= value;
Kumar Gala0bbaf062005-06-20 10:54:21 -05003143 gfar_write(priv->hash_regs[whichreg], tempval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003144}
3145
Andy Fleming7f7f5312005-11-11 12:38:59 -06003146
3147/* There are multiple MAC Address register pairs on some controllers
3148 * This function sets the numth pair to a given address
3149 */
Joe Perchesb6bc7652010-12-21 02:16:08 -08003150static void gfar_set_mac_for_addr(struct net_device *dev, int num,
3151 const u8 *addr)
Andy Fleming7f7f5312005-11-11 12:38:59 -06003152{
3153 struct gfar_private *priv = netdev_priv(dev);
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00003154 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Andy Fleming7f7f5312005-11-11 12:38:59 -06003155 int idx;
3156 char tmpbuf[MAC_ADDR_LEN];
3157 u32 tempval;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003158 u32 __iomem *macptr = &regs->macstnaddr1;
Andy Fleming7f7f5312005-11-11 12:38:59 -06003159
3160 macptr += num*2;
3161
3162 /* Now copy it into the mac registers backwards, cuz */
3163 /* little endian is silly */
3164 for (idx = 0; idx < MAC_ADDR_LEN; idx++)
3165 tmpbuf[MAC_ADDR_LEN - 1 - idx] = addr[idx];
3166
3167 gfar_write(macptr, *((u32 *) (tmpbuf)));
3168
3169 tempval = *((u32 *) (tmpbuf + 4));
3170
3171 gfar_write(macptr+1, tempval);
3172}
3173
Linus Torvalds1da177e2005-04-16 15:20:36 -07003174/* GFAR error interrupt handler */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003175static irqreturn_t gfar_error(int irq, void *grp_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003176{
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003177 struct gfar_priv_grp *gfargrp = grp_id;
3178 struct gfar __iomem *regs = gfargrp->regs;
3179 struct gfar_private *priv= gfargrp->priv;
3180 struct net_device *dev = priv->ndev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003181
3182 /* Save ievent for future reference */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003183 u32 events = gfar_read(&regs->ievent);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003184
3185 /* Clear IEVENT */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003186 gfar_write(&regs->ievent, events & IEVENT_ERR_MASK);
Scott Woodd87eb122008-07-11 18:04:45 -05003187
3188 /* Magic Packet is not an error. */
Andy Flemingb31a1d82008-12-16 15:29:15 -08003189 if ((priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) &&
Scott Woodd87eb122008-07-11 18:04:45 -05003190 (events & IEVENT_MAG))
3191 events &= ~IEVENT_MAG;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003192
3193 /* Hmm... */
Kumar Gala0bbaf062005-06-20 10:54:21 -05003194 if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv))
Joe Perches59deab22011-06-14 08:57:47 +00003195 netdev_dbg(dev, "error interrupt (ievent=0x%08x imask=0x%08x)\n",
3196 events, gfar_read(&regs->imask));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003197
3198 /* Update the error counters */
3199 if (events & IEVENT_TXE) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07003200 dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003201
3202 if (events & IEVENT_LC)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07003203 dev->stats.tx_window_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003204 if (events & IEVENT_CRL)
Jeff Garzik09f75cd2007-10-03 17:41:50 -07003205 dev->stats.tx_aborted_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003206 if (events & IEVENT_XFUN) {
Anton Vorontsov836cf7f2009-11-10 14:11:08 +00003207 unsigned long flags;
3208
Joe Perches59deab22011-06-14 08:57:47 +00003209 netif_dbg(priv, tx_err, dev,
3210 "TX FIFO underrun, packet dropped\n");
Jeff Garzik09f75cd2007-10-03 17:41:50 -07003211 dev->stats.tx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003212 priv->extra_stats.tx_underrun++;
3213
Anton Vorontsov836cf7f2009-11-10 14:11:08 +00003214 local_irq_save(flags);
3215 lock_tx_qs(priv);
3216
Linus Torvalds1da177e2005-04-16 15:20:36 -07003217 /* Reactivate the Tx Queues */
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +00003218 gfar_write(&regs->tstat, gfargrp->tstat);
Anton Vorontsov836cf7f2009-11-10 14:11:08 +00003219
3220 unlock_tx_qs(priv);
3221 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003222 }
Joe Perches59deab22011-06-14 08:57:47 +00003223 netif_dbg(priv, tx_err, dev, "Transmit Error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003224 }
3225 if (events & IEVENT_BSY) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07003226 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003227 priv->extra_stats.rx_bsy++;
3228
Sandeep Gopalpetf4983702009-11-02 07:03:09 +00003229 gfar_receive(irq, grp_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003230
Joe Perches59deab22011-06-14 08:57:47 +00003231 netif_dbg(priv, rx_err, dev, "busy error (rstat: %x)\n",
3232 gfar_read(&regs->rstat));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003233 }
3234 if (events & IEVENT_BABR) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07003235 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003236 priv->extra_stats.rx_babr++;
3237
Joe Perches59deab22011-06-14 08:57:47 +00003238 netif_dbg(priv, rx_err, dev, "babbling RX error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003239 }
3240 if (events & IEVENT_EBERR) {
3241 priv->extra_stats.eberr++;
Joe Perches59deab22011-06-14 08:57:47 +00003242 netif_dbg(priv, rx_err, dev, "bus error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003243 }
Joe Perches59deab22011-06-14 08:57:47 +00003244 if (events & IEVENT_RXC)
3245 netif_dbg(priv, rx_status, dev, "control frame\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003246
3247 if (events & IEVENT_BABT) {
3248 priv->extra_stats.tx_babt++;
Joe Perches59deab22011-06-14 08:57:47 +00003249 netif_dbg(priv, tx_err, dev, "babbling TX error\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003250 }
3251 return IRQ_HANDLED;
3252}
3253
Andy Flemingb31a1d82008-12-16 15:29:15 -08003254static struct of_device_id gfar_match[] =
3255{
3256 {
3257 .type = "network",
3258 .compatible = "gianfar",
3259 },
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +00003260 {
3261 .compatible = "fsl,etsec2",
3262 },
Andy Flemingb31a1d82008-12-16 15:29:15 -08003263 {},
3264};
Anton Vorontsove72701a2009-10-14 14:54:52 -07003265MODULE_DEVICE_TABLE(of, gfar_match);
Andy Flemingb31a1d82008-12-16 15:29:15 -08003266
Linus Torvalds1da177e2005-04-16 15:20:36 -07003267/* Structure for a device driver */
Grant Likely74888762011-02-22 21:05:51 -07003268static struct platform_driver gfar_driver = {
Grant Likely40182942010-04-13 16:13:02 -07003269 .driver = {
3270 .name = "fsl-gianfar",
3271 .owner = THIS_MODULE,
3272 .pm = GFAR_PM_OPS,
3273 .of_match_table = gfar_match,
3274 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07003275 .probe = gfar_probe,
3276 .remove = gfar_remove,
3277};
3278
3279static int __init gfar_init(void)
3280{
Grant Likely74888762011-02-22 21:05:51 -07003281 return platform_driver_register(&gfar_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003282}
3283
3284static void __exit gfar_exit(void)
3285{
Grant Likely74888762011-02-22 21:05:51 -07003286 platform_driver_unregister(&gfar_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003287}
3288
3289module_init(gfar_init);
3290module_exit(gfar_exit);
3291