blob: ba99af05bf62744148a4d33d008c04ddece97a98 [file] [log] [blame]
Santiago Leonf148f612010-09-03 18:29:30 +00001/*
Santiago Leon9d348af2010-09-03 18:29:53 +00002 * IBM Power Virtual Ethernet Device Driver
Santiago Leonf148f612010-09-03 18:29:30 +00003 *
Santiago Leon9d348af2010-09-03 18:29:53 +00004 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
Santiago Leonf148f612010-09-03 18:29:30 +00008 *
Santiago Leon9d348af2010-09-03 18:29:53 +00009 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Santiago Leonf148f612010-09-03 18:29:30 +000013 *
Santiago Leon9d348af2010-09-03 18:29:53 +000014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Santiago Leonf148f612010-09-03 18:29:30 +000017 *
Santiago Leon9d348af2010-09-03 18:29:53 +000018 * Copyright (C) IBM Corporation, 2003, 2010
19 *
20 * Authors: Dave Larson <larson1@us.ibm.com>
21 * Santiago Leon <santil@linux.vnet.ibm.com>
22 * Brian King <brking@linux.vnet.ibm.com>
23 * Robert Jennings <rcj@linux.vnet.ibm.com>
24 * Anton Blanchard <anton@au.ibm.com>
Santiago Leonf148f612010-09-03 18:29:30 +000025 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/module.h>
Robert Jennings1096d632008-07-24 04:34:52 +100028#include <linux/moduleparam.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/types.h>
30#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/dma-mapping.h>
32#include <linux/kernel.h>
33#include <linux/netdevice.h>
34#include <linux/etherdevice.h>
35#include <linux/skbuff.h>
36#include <linux/init.h>
Alexey Dobriyana6b7a402011-06-06 10:43:46 +000037#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/mm.h>
Brian Kinge7a3af52010-05-07 08:56:08 +000039#include <linux/pm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <linux/ethtool.h>
Brian Kingf4ff2872007-09-15 13:36:07 -070041#include <linux/in.h>
42#include <linux/ip.h>
Santiago Leonab78df72010-09-03 18:28:52 +000043#include <linux/ipv6.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090044#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <asm/hvcall.h>
Arun Sharma600634972011-07-26 16:09:06 -070046#include <linux/atomic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <asm/vio.h>
Robert Jennings1096d632008-07-24 04:34:52 +100048#include <asm/iommu.h>
Robert Jennings1096d632008-07-24 04:34:52 +100049#include <asm/firmware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51#include "ibmveth.h"
52
David Howells7d12e782006-10-05 14:55:46 +010053static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
Michael Ellerman493a6842007-04-17 13:12:55 +100054static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
Robert Jennings1096d632008-07-24 04:34:52 +100055static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev);
Santiago Leone295fe82010-09-03 18:29:08 +000056
Santiago Leon860f2422006-04-25 11:19:59 -050057static struct kobj_type ktype_veth_pool;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Robert Jennings1096d632008-07-24 04:34:52 +100059
Linus Torvalds1da177e2005-04-16 15:20:36 -070060static const char ibmveth_driver_name[] = "ibmveth";
Santiago Leon9d348af2010-09-03 18:29:53 +000061static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver";
62#define ibmveth_driver_version "1.04"
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Santiago Leon9d348af2010-09-03 18:29:53 +000064MODULE_AUTHOR("Santiago Leon <santil@linux.vnet.ibm.com>");
65MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070066MODULE_LICENSE("GPL");
67MODULE_VERSION(ibmveth_driver_version);
68
Santiago Leonc08cc3c2010-09-03 18:28:20 +000069static unsigned int tx_copybreak __read_mostly = 128;
70module_param(tx_copybreak, uint, 0644);
71MODULE_PARM_DESC(tx_copybreak,
72 "Maximum size of packet that is copied to a new buffer on transmit");
73
Santiago Leon8d86c612010-09-03 18:28:25 +000074static unsigned int rx_copybreak __read_mostly = 128;
75module_param(rx_copybreak, uint, 0644);
76MODULE_PARM_DESC(rx_copybreak,
77 "Maximum size of packet that is copied to a new buffer on receive");
78
Santiago Leon0c26b672010-09-03 18:28:41 +000079static unsigned int rx_flush __read_mostly = 0;
80module_param(rx_flush, uint, 0644);
81MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use");
82
Brian Kingddbb4de2007-08-17 09:16:43 -050083struct ibmveth_stat {
84 char name[ETH_GSTRING_LEN];
85 int offset;
86};
87
88#define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
89#define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
90
91struct ibmveth_stat ibmveth_stats[] = {
92 { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
93 { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
Santiago Leonf148f612010-09-03 18:29:30 +000094 { "replenish_add_buff_failure",
95 IBMVETH_STAT_OFF(replenish_add_buff_failure) },
96 { "replenish_add_buff_success",
97 IBMVETH_STAT_OFF(replenish_add_buff_success) },
Brian Kingddbb4de2007-08-17 09:16:43 -050098 { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
99 { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
Brian Kingddbb4de2007-08-17 09:16:43 -0500100 { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
101 { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
Santiago Leonab78df72010-09-03 18:28:52 +0000102 { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) },
103 { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) },
Brian Kingddbb4de2007-08-17 09:16:43 -0500104};
105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106/* simple methods of getting data from the current rxq entry */
Brian King79ef4a42007-08-17 09:16:56 -0500107static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
108{
109 return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off;
110}
111
112static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
113{
Santiago Leonf148f612010-09-03 18:29:30 +0000114 return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >>
115 IBMVETH_RXQ_TOGGLE_SHIFT;
Brian King79ef4a42007-08-17 09:16:56 -0500116}
117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
119{
Santiago Leonf148f612010-09-03 18:29:30 +0000120 return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121}
122
123static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
124{
Santiago Leonf148f612010-09-03 18:29:30 +0000125 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126}
127
128static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
129{
Santiago Leonf148f612010-09-03 18:29:30 +0000130 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131}
132
133static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
134{
Santiago Leonf148f612010-09-03 18:29:30 +0000135 return adapter->rx_queue.queue_addr[adapter->rx_queue.index].length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136}
137
Brian Kingf4ff2872007-09-15 13:36:07 -0700138static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
139{
Santiago Leonf148f612010-09-03 18:29:30 +0000140 return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD;
Brian Kingf4ff2872007-09-15 13:36:07 -0700141}
142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143/* setup the initial settings for a buffer pool */
Santiago Leonf148f612010-09-03 18:29:30 +0000144static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool,
145 u32 pool_index, u32 pool_size,
146 u32 buff_size, u32 pool_active)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147{
148 pool->size = pool_size;
149 pool->index = pool_index;
150 pool->buff_size = buff_size;
Santiago Leonc033a6d2010-09-03 18:28:09 +0000151 pool->threshold = pool_size * 7 / 8;
Santiago Leon860f2422006-04-25 11:19:59 -0500152 pool->active = pool_active;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153}
154
155/* allocate and setup an buffer pool - called during open */
156static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
157{
158 int i;
159
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400160 pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
Santiago Leonf148f612010-09-03 18:29:30 +0000162 if (!pool->free_map)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400165 pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
Santiago Leonf148f612010-09-03 18:29:30 +0000166 if (!pool->dma_addr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 kfree(pool->free_map);
168 pool->free_map = NULL;
169 return -1;
170 }
171
Julia Lawalla05abcb2010-05-13 10:06:01 +0000172 pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
Santiago Leonf148f612010-09-03 18:29:30 +0000174 if (!pool->skbuff) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 kfree(pool->dma_addr);
176 pool->dma_addr = NULL;
177
178 kfree(pool->free_map);
179 pool->free_map = NULL;
180 return -1;
181 }
182
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
184
Santiago Leonf148f612010-09-03 18:29:30 +0000185 for (i = 0; i < pool->size; ++i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 pool->free_map[i] = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
188 atomic_set(&pool->available, 0);
189 pool->producer_index = 0;
190 pool->consumer_index = 0;
191
192 return 0;
193}
194
Santiago Leon0c26b672010-09-03 18:28:41 +0000195static inline void ibmveth_flush_buffer(void *addr, unsigned long length)
196{
197 unsigned long offset;
198
199 for (offset = 0; offset < length; offset += SMP_CACHE_BYTES)
200 asm("dcbfl %0,%1" :: "b" (addr), "r" (offset));
201}
202
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203/* replenish the buffers for a pool. note that we don't need to
204 * skb_reserve these since they are used for incoming...
205 */
Santiago Leonf148f612010-09-03 18:29:30 +0000206static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter,
207 struct ibmveth_buff_pool *pool)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
209 u32 i;
210 u32 count = pool->size - atomic_read(&pool->available);
211 u32 buffers_added = 0;
Robert Jennings1096d632008-07-24 04:34:52 +1000212 struct sk_buff *skb;
213 unsigned int free_index, index;
214 u64 correlator;
215 unsigned long lpar_rc;
216 dma_addr_t dma_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217
218 mb();
219
Santiago Leonf148f612010-09-03 18:29:30 +0000220 for (i = 0; i < count; ++i) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 union ibmveth_buf_desc desc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Santiago Leon003212c2010-09-03 18:29:03 +0000223 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
Santiago Leonf148f612010-09-03 18:29:30 +0000225 if (!skb) {
Santiago Leonc43ced12010-09-03 18:29:14 +0000226 netdev_dbg(adapter->netdev,
227 "replenish: unable to allocate skb\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 adapter->replenish_no_mem++;
229 break;
230 }
231
David Gibson047a66d2006-10-21 10:24:13 -0700232 free_index = pool->consumer_index;
Santiago Leona613f582010-09-03 18:28:04 +0000233 pool->consumer_index++;
234 if (pool->consumer_index >= pool->size)
235 pool->consumer_index = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 index = pool->free_map[free_index];
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400237
Santiago Leon64859112010-09-03 18:29:41 +0000238 BUG_ON(index == IBM_VETH_INVALID_MAP);
239 BUG_ON(pool->skbuff[index] != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
241 dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
242 pool->buff_size, DMA_FROM_DEVICE);
243
Stephen Rothwellc713e7c2008-07-28 02:14:24 +1000244 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
Robert Jennings1096d632008-07-24 04:34:52 +1000245 goto failure;
246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
248 pool->dma_addr[index] = dma_addr;
249 pool->skbuff[index] = skb;
250
251 correlator = ((u64)pool->index << 32) | index;
Santiago Leonf148f612010-09-03 18:29:30 +0000252 *(u64 *)skb->data = correlator;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Brian King79ef4a42007-08-17 09:16:56 -0500254 desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400255 desc.fields.address = dma_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
Santiago Leon0c26b672010-09-03 18:28:41 +0000257 if (rx_flush) {
258 unsigned int len = min(pool->buff_size,
259 adapter->netdev->mtu +
260 IBMVETH_BUFF_OH);
261 ibmveth_flush_buffer(skb->data, len);
262 }
Santiago Leonf148f612010-09-03 18:29:30 +0000263 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address,
264 desc.desc);
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400265
Santiago Leonf148f612010-09-03 18:29:30 +0000266 if (lpar_rc != H_SUCCESS) {
Robert Jennings1096d632008-07-24 04:34:52 +1000267 goto failure;
Santiago Leonf148f612010-09-03 18:29:30 +0000268 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 buffers_added++;
270 adapter->replenish_add_buff_success++;
271 }
272 }
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 mb();
275 atomic_add(buffers_added, &(pool->available));
Robert Jennings1096d632008-07-24 04:34:52 +1000276 return;
277
278failure:
279 pool->free_map[free_index] = index;
280 pool->skbuff[index] = NULL;
281 if (pool->consumer_index == 0)
282 pool->consumer_index = pool->size - 1;
283 else
284 pool->consumer_index--;
Stephen Rothwellc713e7c2008-07-28 02:14:24 +1000285 if (!dma_mapping_error(&adapter->vdev->dev, dma_addr))
Robert Jennings1096d632008-07-24 04:34:52 +1000286 dma_unmap_single(&adapter->vdev->dev,
287 pool->dma_addr[index], pool->buff_size,
288 DMA_FROM_DEVICE);
289 dev_kfree_skb_any(skb);
290 adapter->replenish_add_buff_failure++;
291
292 mb();
293 atomic_add(buffers_added, &(pool->available));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294}
295
Santiago Leone2adbcb2005-10-26 10:47:08 -0600296/* replenish routine */
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400297static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298{
Santiago Leonb6d35182005-10-26 10:47:01 -0600299 int i;
300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 adapter->replenish_task_cycles++;
302
Santiago Leon517e80e2010-09-03 18:29:25 +0000303 for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) {
Santiago Leonc033a6d2010-09-03 18:28:09 +0000304 struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i];
305
306 if (pool->active &&
307 (atomic_read(&pool->available) < pool->threshold))
308 ibmveth_replenish_buffer_pool(adapter, pool);
309 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
Santiago Leonf148f612010-09-03 18:29:30 +0000311 adapter->rx_no_buffer = *(u64 *)(((char*)adapter->buffer_list_addr) +
312 4096 - 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313}
314
315/* empty and free ana buffer pool - also used to do cleanup in error paths */
Santiago Leonf148f612010-09-03 18:29:30 +0000316static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter,
317 struct ibmveth_buff_pool *pool)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318{
319 int i;
320
Jesper Juhlb4558ea2005-10-28 16:53:13 -0400321 kfree(pool->free_map);
322 pool->free_map = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
Santiago Leonf148f612010-09-03 18:29:30 +0000324 if (pool->skbuff && pool->dma_addr) {
325 for (i = 0; i < pool->size; ++i) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 struct sk_buff *skb = pool->skbuff[i];
Santiago Leonf148f612010-09-03 18:29:30 +0000327 if (skb) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 dma_unmap_single(&adapter->vdev->dev,
329 pool->dma_addr[i],
330 pool->buff_size,
331 DMA_FROM_DEVICE);
332 dev_kfree_skb_any(skb);
333 pool->skbuff[i] = NULL;
334 }
335 }
336 }
337
Santiago Leonf148f612010-09-03 18:29:30 +0000338 if (pool->dma_addr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 kfree(pool->dma_addr);
340 pool->dma_addr = NULL;
341 }
342
Santiago Leonf148f612010-09-03 18:29:30 +0000343 if (pool->skbuff) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 kfree(pool->skbuff);
345 pool->skbuff = NULL;
346 }
347}
348
349/* remove a buffer from a pool */
Santiago Leonf148f612010-09-03 18:29:30 +0000350static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter,
351 u64 correlator)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352{
353 unsigned int pool = correlator >> 32;
354 unsigned int index = correlator & 0xffffffffUL;
355 unsigned int free_index;
356 struct sk_buff *skb;
357
Santiago Leon64859112010-09-03 18:29:41 +0000358 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
359 BUG_ON(index >= adapter->rx_buff_pool[pool].size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
361 skb = adapter->rx_buff_pool[pool].skbuff[index];
362
Santiago Leon64859112010-09-03 18:29:41 +0000363 BUG_ON(skb == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
365 adapter->rx_buff_pool[pool].skbuff[index] = NULL;
366
367 dma_unmap_single(&adapter->vdev->dev,
368 adapter->rx_buff_pool[pool].dma_addr[index],
369 adapter->rx_buff_pool[pool].buff_size,
370 DMA_FROM_DEVICE);
371
David Gibson047a66d2006-10-21 10:24:13 -0700372 free_index = adapter->rx_buff_pool[pool].producer_index;
Santiago Leona613f582010-09-03 18:28:04 +0000373 adapter->rx_buff_pool[pool].producer_index++;
374 if (adapter->rx_buff_pool[pool].producer_index >=
375 adapter->rx_buff_pool[pool].size)
376 adapter->rx_buff_pool[pool].producer_index = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 adapter->rx_buff_pool[pool].free_map[free_index] = index;
378
379 mb();
380
381 atomic_dec(&(adapter->rx_buff_pool[pool].available));
382}
383
384/* get the current buffer on the rx queue */
385static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
386{
387 u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
388 unsigned int pool = correlator >> 32;
389 unsigned int index = correlator & 0xffffffffUL;
390
Santiago Leon64859112010-09-03 18:29:41 +0000391 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
392 BUG_ON(index >= adapter->rx_buff_pool[pool].size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
394 return adapter->rx_buff_pool[pool].skbuff[index];
395}
396
397/* recycle the current buffer on the rx queue */
398static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
399{
400 u32 q_index = adapter->rx_queue.index;
401 u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
402 unsigned int pool = correlator >> 32;
403 unsigned int index = correlator & 0xffffffffUL;
404 union ibmveth_buf_desc desc;
405 unsigned long lpar_rc;
406
Santiago Leon64859112010-09-03 18:29:41 +0000407 BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
408 BUG_ON(index >= adapter->rx_buff_pool[pool].size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
Santiago Leonf148f612010-09-03 18:29:30 +0000410 if (!adapter->rx_buff_pool[pool].active) {
Santiago Leonb6d35182005-10-26 10:47:01 -0600411 ibmveth_rxq_harvest_buffer(adapter);
412 ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
413 return;
414 }
415
Brian King79ef4a42007-08-17 09:16:56 -0500416 desc.fields.flags_len = IBMVETH_BUF_VALID |
417 adapter->rx_buff_pool[pool].buff_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
419
420 lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400421
Santiago Leonf148f612010-09-03 18:29:30 +0000422 if (lpar_rc != H_SUCCESS) {
Santiago Leonc43ced12010-09-03 18:29:14 +0000423 netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed "
424 "during recycle rc=%ld", lpar_rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
426 }
427
Santiago Leonf148f612010-09-03 18:29:30 +0000428 if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 adapter->rx_queue.index = 0;
430 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
431 }
432}
433
Michael Ellerman493a6842007-04-17 13:12:55 +1000434static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435{
436 ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
437
Santiago Leonf148f612010-09-03 18:29:30 +0000438 if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 adapter->rx_queue.index = 0;
440 adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
441 }
442}
443
444static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
445{
Santiago Leonb6d35182005-10-26 10:47:01 -0600446 int i;
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700447 struct device *dev = &adapter->vdev->dev;
Santiago Leonb6d35182005-10-26 10:47:01 -0600448
Santiago Leonf148f612010-09-03 18:29:30 +0000449 if (adapter->buffer_list_addr != NULL) {
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700450 if (!dma_mapping_error(dev, adapter->buffer_list_dma)) {
451 dma_unmap_single(dev, adapter->buffer_list_dma, 4096,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 DMA_BIDIRECTIONAL);
453 adapter->buffer_list_dma = DMA_ERROR_CODE;
454 }
455 free_page((unsigned long)adapter->buffer_list_addr);
456 adapter->buffer_list_addr = NULL;
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400457 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
Santiago Leonf148f612010-09-03 18:29:30 +0000459 if (adapter->filter_list_addr != NULL) {
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700460 if (!dma_mapping_error(dev, adapter->filter_list_dma)) {
461 dma_unmap_single(dev, adapter->filter_list_dma, 4096,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 DMA_BIDIRECTIONAL);
463 adapter->filter_list_dma = DMA_ERROR_CODE;
464 }
465 free_page((unsigned long)adapter->filter_list_addr);
466 adapter->filter_list_addr = NULL;
467 }
468
Santiago Leonf148f612010-09-03 18:29:30 +0000469 if (adapter->rx_queue.queue_addr != NULL) {
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700470 if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) {
471 dma_unmap_single(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 adapter->rx_queue.queue_dma,
473 adapter->rx_queue.queue_len,
474 DMA_BIDIRECTIONAL);
475 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
476 }
477 kfree(adapter->rx_queue.queue_addr);
478 adapter->rx_queue.queue_addr = NULL;
479 }
480
Santiago Leonf148f612010-09-03 18:29:30 +0000481 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
Santiago Leon860f2422006-04-25 11:19:59 -0500482 if (adapter->rx_buff_pool[i].active)
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400483 ibmveth_free_buffer_pool(adapter,
Santiago Leon860f2422006-04-25 11:19:59 -0500484 &adapter->rx_buff_pool[i]);
Robert Jennings1096d632008-07-24 04:34:52 +1000485
486 if (adapter->bounce_buffer != NULL) {
Stephen Rothwellc713e7c2008-07-28 02:14:24 +1000487 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
Robert Jennings1096d632008-07-24 04:34:52 +1000488 dma_unmap_single(&adapter->vdev->dev,
489 adapter->bounce_buffer_dma,
490 adapter->netdev->mtu + IBMVETH_BUFF_OH,
491 DMA_BIDIRECTIONAL);
492 adapter->bounce_buffer_dma = DMA_ERROR_CODE;
493 }
494 kfree(adapter->bounce_buffer);
495 adapter->bounce_buffer = NULL;
496 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497}
498
Michael Ellermanbbedefc2006-10-03 12:24:23 -0500499static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
500 union ibmveth_buf_desc rxq_desc, u64 mac_address)
501{
502 int rc, try_again = 1;
503
Santiago Leonf148f612010-09-03 18:29:30 +0000504 /*
505 * After a kexec the adapter will still be open, so our attempt to
506 * open it will fail. So if we get a failure we free the adapter and
507 * try again, but only once.
508 */
Michael Ellermanbbedefc2006-10-03 12:24:23 -0500509retry:
510 rc = h_register_logical_lan(adapter->vdev->unit_address,
511 adapter->buffer_list_dma, rxq_desc.desc,
512 adapter->filter_list_dma, mac_address);
513
514 if (rc != H_SUCCESS && try_again) {
515 do {
516 rc = h_free_logical_lan(adapter->vdev->unit_address);
517 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
518
519 try_again = 0;
520 goto retry;
521 }
522
523 return rc;
524}
525
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526static int ibmveth_open(struct net_device *netdev)
527{
Wang Chen4cf16532008-11-12 23:38:14 -0800528 struct ibmveth_adapter *adapter = netdev_priv(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 u64 mac_address = 0;
Santiago Leonb6d35182005-10-26 10:47:01 -0600530 int rxq_entries = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 unsigned long lpar_rc;
532 int rc;
533 union ibmveth_buf_desc rxq_desc;
Santiago Leonb6d35182005-10-26 10:47:01 -0600534 int i;
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700535 struct device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
Santiago Leonc43ced12010-09-03 18:29:14 +0000537 netdev_dbg(netdev, "open starting\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700539 napi_enable(&adapter->napi);
540
Santiago Leon517e80e2010-09-03 18:29:25 +0000541 for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
Santiago Leonb6d35182005-10-26 10:47:01 -0600542 rxq_entries += adapter->rx_buff_pool[i].size;
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400543
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
545 adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400546
Santiago Leonf148f612010-09-03 18:29:30 +0000547 if (!adapter->buffer_list_addr || !adapter->filter_list_addr) {
Santiago Leon21c2dec2010-09-03 18:29:19 +0000548 netdev_err(netdev, "unable to allocate filter or buffer list "
549 "pages\n");
Denis Kirjanov88426f22010-10-20 04:21:13 +0000550 rc = -ENOMEM;
551 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 }
553
Santiago Leonf148f612010-09-03 18:29:30 +0000554 adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) *
555 rxq_entries;
556 adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len,
557 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558
Santiago Leonf148f612010-09-03 18:29:30 +0000559 if (!adapter->rx_queue.queue_addr) {
Santiago Leon21c2dec2010-09-03 18:29:19 +0000560 netdev_err(netdev, "unable to allocate rx queue pages\n");
Denis Kirjanov88426f22010-10-20 04:21:13 +0000561 rc = -ENOMEM;
562 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 }
564
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700565 dev = &adapter->vdev->dev;
566
567 adapter->buffer_list_dma = dma_map_single(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700569 adapter->filter_list_dma = dma_map_single(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700571 adapter->rx_queue.queue_dma = dma_map_single(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 adapter->rx_queue.queue_addr,
573 adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
574
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700575 if ((dma_mapping_error(dev, adapter->buffer_list_dma)) ||
576 (dma_mapping_error(dev, adapter->filter_list_dma)) ||
577 (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) {
Santiago Leon21c2dec2010-09-03 18:29:19 +0000578 netdev_err(netdev, "unable to map filter or buffer list "
579 "pages\n");
Denis Kirjanov88426f22010-10-20 04:21:13 +0000580 rc = -ENOMEM;
581 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 }
583
584 adapter->rx_queue.index = 0;
585 adapter->rx_queue.num_slots = rxq_entries;
586 adapter->rx_queue.toggle = 1;
587
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
589 mac_address = mac_address >> 16;
590
Santiago Leonf148f612010-09-03 18:29:30 +0000591 rxq_desc.fields.flags_len = IBMVETH_BUF_VALID |
592 adapter->rx_queue.queue_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 rxq_desc.fields.address = adapter->rx_queue.queue_dma;
594
Santiago Leonc43ced12010-09-03 18:29:14 +0000595 netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr);
596 netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr);
597 netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598
Santiago Leon4347ef12006-10-03 12:24:34 -0500599 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
600
Michael Ellermanbbedefc2006-10-03 12:24:23 -0500601 lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
Santiago Leonf148f612010-09-03 18:29:30 +0000603 if (lpar_rc != H_SUCCESS) {
Santiago Leon21c2dec2010-09-03 18:29:19 +0000604 netdev_err(netdev, "h_register_logical_lan failed with %ld\n",
605 lpar_rc);
606 netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq "
607 "desc:0x%llx MAC:0x%llx\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 adapter->buffer_list_dma,
609 adapter->filter_list_dma,
610 rxq_desc.desc,
611 mac_address);
Denis Kirjanov88426f22010-10-20 04:21:13 +0000612 rc = -ENONET;
613 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 }
615
Santiago Leonf148f612010-09-03 18:29:30 +0000616 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
617 if (!adapter->rx_buff_pool[i].active)
Santiago Leon860f2422006-04-25 11:19:59 -0500618 continue;
619 if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
Santiago Leon21c2dec2010-09-03 18:29:19 +0000620 netdev_err(netdev, "unable to alloc pool\n");
Santiago Leon860f2422006-04-25 11:19:59 -0500621 adapter->rx_buff_pool[i].active = 0;
Denis Kirjanov88426f22010-10-20 04:21:13 +0000622 rc = -ENOMEM;
623 goto err_out;
Santiago Leon860f2422006-04-25 11:19:59 -0500624 }
625 }
626
Santiago Leonc43ced12010-09-03 18:29:14 +0000627 netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq);
Santiago Leonf148f612010-09-03 18:29:30 +0000628 rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name,
629 netdev);
630 if (rc != 0) {
Santiago Leon21c2dec2010-09-03 18:29:19 +0000631 netdev_err(netdev, "unable to request irq 0x%x, rc %d\n",
632 netdev->irq, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 do {
634 rc = h_free_logical_lan(adapter->vdev->unit_address);
Segher Boessenkool706c8c92006-03-30 14:49:40 +0200635 } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
Denis Kirjanov88426f22010-10-20 04:21:13 +0000637 goto err_out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 }
639
Robert Jennings1096d632008-07-24 04:34:52 +1000640 adapter->bounce_buffer =
641 kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL);
642 if (!adapter->bounce_buffer) {
Santiago Leon21c2dec2010-09-03 18:29:19 +0000643 netdev_err(netdev, "unable to allocate bounce buffer\n");
Denis Kirjanov88426f22010-10-20 04:21:13 +0000644 rc = -ENOMEM;
Denis Kirjanove0e8ab52010-10-20 04:21:51 +0000645 goto err_out_free_irq;
Robert Jennings1096d632008-07-24 04:34:52 +1000646 }
647 adapter->bounce_buffer_dma =
648 dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer,
649 netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700650 if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
Santiago Leon21c2dec2010-09-03 18:29:19 +0000651 netdev_err(netdev, "unable to map bounce buffer\n");
Denis Kirjanov88426f22010-10-20 04:21:13 +0000652 rc = -ENOMEM;
Denis Kirjanove0e8ab52010-10-20 04:21:51 +0000653 goto err_out_free_irq;
Robert Jennings1096d632008-07-24 04:34:52 +1000654 }
655
Santiago Leonc43ced12010-09-03 18:29:14 +0000656 netdev_dbg(netdev, "initial replenish cycle\n");
David Howells7d12e782006-10-05 14:55:46 +0100657 ibmveth_interrupt(netdev->irq, netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658
Santiago Leone2adbcb2005-10-26 10:47:08 -0600659 netif_start_queue(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660
Santiago Leonc43ced12010-09-03 18:29:14 +0000661 netdev_dbg(netdev, "open complete\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662
663 return 0;
Denis Kirjanov88426f22010-10-20 04:21:13 +0000664
Denis Kirjanove0e8ab52010-10-20 04:21:51 +0000665err_out_free_irq:
666 free_irq(netdev->irq, netdev);
Denis Kirjanov88426f22010-10-20 04:21:13 +0000667err_out:
668 ibmveth_cleanup(adapter);
669 napi_disable(&adapter->napi);
670 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671}
672
673static int ibmveth_close(struct net_device *netdev)
674{
Wang Chen4cf16532008-11-12 23:38:14 -0800675 struct ibmveth_adapter *adapter = netdev_priv(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 long lpar_rc;
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400677
Santiago Leonc43ced12010-09-03 18:29:14 +0000678 netdev_dbg(netdev, "close starting\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700680 napi_disable(&adapter->napi);
681
Santiago Leon860f2422006-04-25 11:19:59 -0500682 if (!adapter->pool_config)
683 netif_stop_queue(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
Robert Jenningsee2e6112010-07-16 04:57:25 +0000685 h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 do {
688 lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
Segher Boessenkool706c8c92006-03-30 14:49:40 +0200689 } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
Santiago Leonf148f612010-09-03 18:29:30 +0000691 if (lpar_rc != H_SUCCESS) {
Santiago Leon21c2dec2010-09-03 18:29:19 +0000692 netdev_err(netdev, "h_free_logical_lan failed with %lx, "
693 "continuing with close\n", lpar_rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 }
695
Robert Jenningsee2e6112010-07-16 04:57:25 +0000696 free_irq(netdev->irq, netdev);
697
Santiago Leonf148f612010-09-03 18:29:30 +0000698 adapter->rx_no_buffer = *(u64 *)(((char *)adapter->buffer_list_addr) +
699 4096 - 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
701 ibmveth_cleanup(adapter);
702
Santiago Leonc43ced12010-09-03 18:29:14 +0000703 netdev_dbg(netdev, "close complete\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
705 return 0;
706}
707
Santiago Leonf148f612010-09-03 18:29:30 +0000708static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
709{
710 cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
711 SUPPORTED_FIBRE);
712 cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
713 ADVERTISED_FIBRE);
David Decotigny70739492011-04-27 18:32:40 +0000714 ethtool_cmd_speed_set(cmd, SPEED_1000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 cmd->duplex = DUPLEX_FULL;
716 cmd->port = PORT_FIBRE;
717 cmd->phy_address = 0;
718 cmd->transceiver = XCVR_INTERNAL;
719 cmd->autoneg = AUTONEG_ENABLE;
720 cmd->maxtxpkt = 0;
721 cmd->maxrxpkt = 1;
722 return 0;
723}
724
Santiago Leonf148f612010-09-03 18:29:30 +0000725static void netdev_get_drvinfo(struct net_device *dev,
726 struct ethtool_drvinfo *info)
727{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
Santiago Leonf148f612010-09-03 18:29:30 +0000729 strncpy(info->version, ibmveth_driver_version,
730 sizeof(info->version) - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731}
732
Michał Mirosławb9367bf2011-04-19 02:14:25 +0000733static u32 ibmveth_fix_features(struct net_device *dev, u32 features)
Brian King5fc7e012007-08-17 09:16:31 -0500734{
Michał Mirosławb9367bf2011-04-19 02:14:25 +0000735 /*
736 * Since the ibmveth firmware interface does not have the
737 * concept of separate tx/rx checksum offload enable, if rx
738 * checksum is disabled we also have to disable tx checksum
739 * offload. Once we disable rx checksum offload, we are no
740 * longer allowed to send tx buffers that are not properly
741 * checksummed.
742 */
Brian King5fc7e012007-08-17 09:16:31 -0500743
Michał Mirosławb9367bf2011-04-19 02:14:25 +0000744 if (!(features & NETIF_F_RXCSUM))
745 features &= ~NETIF_F_ALL_CSUM;
746
747 return features;
Brian King5fc7e012007-08-17 09:16:31 -0500748}
749
Michał Mirosławb9367bf2011-04-19 02:14:25 +0000750static int ibmveth_set_csum_offload(struct net_device *dev, u32 data)
Brian King5fc7e012007-08-17 09:16:31 -0500751{
Wang Chen4cf16532008-11-12 23:38:14 -0800752 struct ibmveth_adapter *adapter = netdev_priv(dev);
Stephen Rothwellff5bfc32009-01-06 10:47:44 -0800753 unsigned long set_attr, clr_attr, ret_attr;
Santiago Leonab78df72010-09-03 18:28:52 +0000754 unsigned long set_attr6, clr_attr6;
755 long ret, ret6;
Brian King5fc7e012007-08-17 09:16:31 -0500756 int rc1 = 0, rc2 = 0;
757 int restart = 0;
758
759 if (netif_running(dev)) {
760 restart = 1;
761 adapter->pool_config = 1;
762 ibmveth_close(dev);
763 adapter->pool_config = 0;
764 }
765
Brian King79ef4a42007-08-17 09:16:56 -0500766 set_attr = 0;
767 clr_attr = 0;
Brian King5fc7e012007-08-17 09:16:31 -0500768
Santiago Leonab78df72010-09-03 18:28:52 +0000769 if (data) {
Brian King79ef4a42007-08-17 09:16:56 -0500770 set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
Santiago Leonab78df72010-09-03 18:28:52 +0000771 set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
772 } else {
Brian King79ef4a42007-08-17 09:16:56 -0500773 clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
Santiago Leonab78df72010-09-03 18:28:52 +0000774 clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
775 }
Brian King5fc7e012007-08-17 09:16:31 -0500776
Brian King79ef4a42007-08-17 09:16:56 -0500777 ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
Brian King5fc7e012007-08-17 09:16:31 -0500778
Brian King79ef4a42007-08-17 09:16:56 -0500779 if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
780 !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
781 (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
782 ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
783 set_attr, &ret_attr);
Brian King5fc7e012007-08-17 09:16:31 -0500784
785 if (ret != H_SUCCESS) {
Santiago Leon21c2dec2010-09-03 18:29:19 +0000786 netdev_err(dev, "unable to change IPv4 checksum "
787 "offload settings. %d rc=%ld\n",
788 data, ret);
Brian King5fc7e012007-08-17 09:16:31 -0500789
790 ret = h_illan_attributes(adapter->vdev->unit_address,
Brian King79ef4a42007-08-17 09:16:56 -0500791 set_attr, clr_attr, &ret_attr);
Santiago Leonf148f612010-09-03 18:29:30 +0000792 } else {
Santiago Leonab78df72010-09-03 18:28:52 +0000793 adapter->fw_ipv4_csum_support = data;
Santiago Leonf148f612010-09-03 18:29:30 +0000794 }
Santiago Leonab78df72010-09-03 18:28:52 +0000795
796 ret6 = h_illan_attributes(adapter->vdev->unit_address,
797 clr_attr6, set_attr6, &ret_attr);
798
799 if (ret6 != H_SUCCESS) {
Santiago Leon21c2dec2010-09-03 18:29:19 +0000800 netdev_err(dev, "unable to change IPv6 checksum "
801 "offload settings. %d rc=%ld\n",
802 data, ret);
Santiago Leonab78df72010-09-03 18:28:52 +0000803
804 ret = h_illan_attributes(adapter->vdev->unit_address,
805 set_attr6, clr_attr6,
806 &ret_attr);
807 } else
808 adapter->fw_ipv6_csum_support = data;
809
Michał Mirosławb9367bf2011-04-19 02:14:25 +0000810 if (ret != H_SUCCESS || ret6 != H_SUCCESS)
811 adapter->rx_csum = data;
Santiago Leonab78df72010-09-03 18:28:52 +0000812 else
813 rc1 = -EIO;
Brian King5fc7e012007-08-17 09:16:31 -0500814 } else {
815 rc1 = -EIO;
Santiago Leon21c2dec2010-09-03 18:29:19 +0000816 netdev_err(dev, "unable to change checksum offload settings."
817 " %d rc=%ld ret_attr=%lx\n", data, ret,
818 ret_attr);
Brian King5fc7e012007-08-17 09:16:31 -0500819 }
820
821 if (restart)
822 rc2 = ibmveth_open(dev);
823
824 return rc1 ? rc1 : rc2;
825}
826
Michał Mirosławb9367bf2011-04-19 02:14:25 +0000827static int ibmveth_set_features(struct net_device *dev, u32 features)
Brian King5fc7e012007-08-17 09:16:31 -0500828{
Wang Chen4cf16532008-11-12 23:38:14 -0800829 struct ibmveth_adapter *adapter = netdev_priv(dev);
Michał Mirosławb9367bf2011-04-19 02:14:25 +0000830 int rx_csum = !!(features & NETIF_F_RXCSUM);
831 int rc;
Brian King5fc7e012007-08-17 09:16:31 -0500832
Michał Mirosławb9367bf2011-04-19 02:14:25 +0000833 if (rx_csum == adapter->rx_csum)
Brian King5fc7e012007-08-17 09:16:31 -0500834 return 0;
835
Michał Mirosławb9367bf2011-04-19 02:14:25 +0000836 rc = ibmveth_set_csum_offload(dev, rx_csum);
837 if (rc && !adapter->rx_csum)
838 dev->features = features & ~(NETIF_F_ALL_CSUM | NETIF_F_RXCSUM);
Brian King5fc7e012007-08-17 09:16:31 -0500839
840 return rc;
841}
842
Brian Kingddbb4de2007-08-17 09:16:43 -0500843static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
844{
845 int i;
846
847 if (stringset != ETH_SS_STATS)
848 return;
849
850 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
851 memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
852}
853
Jeff Garzikb9f2c042007-10-03 18:07:32 -0700854static int ibmveth_get_sset_count(struct net_device *dev, int sset)
Brian Kingddbb4de2007-08-17 09:16:43 -0500855{
Jeff Garzikb9f2c042007-10-03 18:07:32 -0700856 switch (sset) {
857 case ETH_SS_STATS:
858 return ARRAY_SIZE(ibmveth_stats);
859 default:
860 return -EOPNOTSUPP;
861 }
Brian Kingddbb4de2007-08-17 09:16:43 -0500862}
863
864static void ibmveth_get_ethtool_stats(struct net_device *dev,
865 struct ethtool_stats *stats, u64 *data)
866{
867 int i;
Wang Chen4cf16532008-11-12 23:38:14 -0800868 struct ibmveth_adapter *adapter = netdev_priv(dev);
Brian Kingddbb4de2007-08-17 09:16:43 -0500869
870 for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
871 data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
872}
873
Jeff Garzik7282d492006-09-13 14:30:00 -0400874static const struct ethtool_ops netdev_ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 .get_drvinfo = netdev_get_drvinfo,
876 .get_settings = netdev_get_settings,
Ben Hutchingsed4ba4b2010-12-09 12:10:25 +0000877 .get_link = ethtool_op_get_link,
Brian Kingddbb4de2007-08-17 09:16:43 -0500878 .get_strings = ibmveth_get_strings,
Jeff Garzikb9f2c042007-10-03 18:07:32 -0700879 .get_sset_count = ibmveth_get_sset_count,
Brian Kingddbb4de2007-08-17 09:16:43 -0500880 .get_ethtool_stats = ibmveth_get_ethtool_stats,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881};
882
883static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
884{
885 return -EOPNOTSUPP;
886}
887
888#define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
889
Santiago Leon6e8ab302010-09-03 18:28:36 +0000890static int ibmveth_send(struct ibmveth_adapter *adapter,
891 union ibmveth_buf_desc *descs)
892{
893 unsigned long correlator;
894 unsigned int retry_count;
895 unsigned long ret;
896
897 /*
898 * The retry count sets a maximum for the number of broadcast and
899 * multicast destinations within the system.
900 */
901 retry_count = 1024;
902 correlator = 0;
903 do {
904 ret = h_send_logical_lan(adapter->vdev->unit_address,
905 descs[0].desc, descs[1].desc,
906 descs[2].desc, descs[3].desc,
907 descs[4].desc, descs[5].desc,
908 correlator, &correlator);
909 } while ((ret == H_BUSY) && (retry_count--));
910
911 if (ret != H_SUCCESS && ret != H_DROPPED) {
Santiago Leon21c2dec2010-09-03 18:29:19 +0000912 netdev_err(adapter->netdev, "tx: h_send_logical_lan failed "
913 "with rc=%ld\n", ret);
Santiago Leon6e8ab302010-09-03 18:28:36 +0000914 return 1;
915 }
916
917 return 0;
918}
919
Stephen Hemminger613573252009-08-31 19:50:58 +0000920static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
921 struct net_device *netdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922{
Wang Chen4cf16532008-11-12 23:38:14 -0800923 struct ibmveth_adapter *adapter = netdev_priv(netdev);
Santiago Leon6e8ab302010-09-03 18:28:36 +0000924 unsigned int desc_flags;
925 union ibmveth_buf_desc descs[6];
926 int last, i;
927 int force_bounce = 0;
Santiago Leon60296d92005-10-26 10:47:16 -0600928
Santiago Leon6e8ab302010-09-03 18:28:36 +0000929 /*
930 * veth handles a maximum of 6 segments including the header, so
931 * we have to linearize the skb if there are more than this.
932 */
933 if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) {
934 netdev->stats.tx_dropped++;
Brian Kingf4ff2872007-09-15 13:36:07 -0700935 goto out;
936 }
937
Santiago Leon6e8ab302010-09-03 18:28:36 +0000938 /* veth can't checksum offload UDP */
939 if (skb->ip_summed == CHECKSUM_PARTIAL &&
Santiago Leonab78df72010-09-03 18:28:52 +0000940 ((skb->protocol == htons(ETH_P_IP) &&
941 ip_hdr(skb)->protocol != IPPROTO_TCP) ||
942 (skb->protocol == htons(ETH_P_IPV6) &&
943 ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) &&
944 skb_checksum_help(skb)) {
945
Santiago Leon21c2dec2010-09-03 18:29:19 +0000946 netdev_err(netdev, "tx: failed to checksum packet\n");
Santiago Leon6e8ab302010-09-03 18:28:36 +0000947 netdev->stats.tx_dropped++;
948 goto out;
949 }
Brian Kingf4ff2872007-09-15 13:36:07 -0700950
Santiago Leon6e8ab302010-09-03 18:28:36 +0000951 desc_flags = IBMVETH_BUF_VALID;
952
953 if (skb->ip_summed == CHECKSUM_PARTIAL) {
954 unsigned char *buf = skb_transport_header(skb) +
955 skb->csum_offset;
956
957 desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
Brian Kingf4ff2872007-09-15 13:36:07 -0700958
959 /* Need to zero out the checksum */
960 buf[0] = 0;
961 buf[1] = 0;
962 }
963
Santiago Leon6e8ab302010-09-03 18:28:36 +0000964retry_bounce:
965 memset(descs, 0, sizeof(descs));
Santiago Leonc08cc3c2010-09-03 18:28:20 +0000966
Santiago Leon6e8ab302010-09-03 18:28:36 +0000967 /*
968 * If a linear packet is below the rx threshold then
969 * copy it into the static bounce buffer. This avoids the
970 * cost of a TCE insert and remove.
971 */
972 if (force_bounce || (!skb_is_nonlinear(skb) &&
973 (skb->len < tx_copybreak))) {
Robert Jennings1096d632008-07-24 04:34:52 +1000974 skb_copy_from_linear_data(skb, adapter->bounce_buffer,
975 skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976
Santiago Leon6e8ab302010-09-03 18:28:36 +0000977 descs[0].fields.flags_len = desc_flags | skb->len;
978 descs[0].fields.address = adapter->bounce_buffer_dma;
Jeff Garzikd7fbeba2006-05-24 01:31:14 -0400979
Santiago Leon6e8ab302010-09-03 18:28:36 +0000980 if (ibmveth_send(adapter, descs)) {
981 adapter->tx_send_failed++;
982 netdev->stats.tx_dropped++;
983 } else {
984 netdev->stats.tx_packets++;
985 netdev->stats.tx_bytes += skb->len;
986 }
987
988 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 }
990
Santiago Leon6e8ab302010-09-03 18:28:36 +0000991 /* Map the header */
992 descs[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
993 skb_headlen(skb),
994 DMA_TO_DEVICE);
995 if (dma_mapping_error(&adapter->vdev->dev, descs[0].fields.address))
996 goto map_failed;
997
998 descs[0].fields.flags_len = desc_flags | skb_headlen(skb);
999
1000 /* Map the frags */
1001 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1002 unsigned long dma_addr;
1003 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1004
1005 dma_addr = dma_map_page(&adapter->vdev->dev, frag->page,
1006 frag->page_offset, frag->size,
1007 DMA_TO_DEVICE);
1008
1009 if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
1010 goto map_failed_frags;
1011
1012 descs[i+1].fields.flags_len = desc_flags | frag->size;
1013 descs[i+1].fields.address = dma_addr;
1014 }
1015
1016 if (ibmveth_send(adapter, descs)) {
1017 adapter->tx_send_failed++;
1018 netdev->stats.tx_dropped++;
1019 } else {
1020 netdev->stats.tx_packets++;
1021 netdev->stats.tx_bytes += skb->len;
1022 }
1023
1024 for (i = 0; i < skb_shinfo(skb)->nr_frags + 1; i++)
1025 dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
1026 descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
1027 DMA_TO_DEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028
Santiago Leone8cb7eb2010-09-03 18:28:15 +00001029out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 dev_kfree_skb(skb);
Patrick McHardy6ed10652009-06-23 06:03:08 +00001031 return NETDEV_TX_OK;
Santiago Leon6e8ab302010-09-03 18:28:36 +00001032
1033map_failed_frags:
1034 last = i+1;
1035 for (i = 0; i < last; i++)
1036 dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
1037 descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
1038 DMA_TO_DEVICE);
1039
1040map_failed:
1041 if (!firmware_has_feature(FW_FEATURE_CMO))
Santiago Leon21c2dec2010-09-03 18:29:19 +00001042 netdev_err(netdev, "tx: unable to map xmit buffer\n");
Santiago Leon6e8ab302010-09-03 18:28:36 +00001043 adapter->tx_map_failed++;
1044 skb_linearize(skb);
1045 force_bounce = 1;
1046 goto retry_bounce;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047}
1048
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001049static int ibmveth_poll(struct napi_struct *napi, int budget)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050{
Santiago Leonf148f612010-09-03 18:29:30 +00001051 struct ibmveth_adapter *adapter =
1052 container_of(napi, struct ibmveth_adapter, napi);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001053 struct net_device *netdev = adapter->netdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 int frames_processed = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055 unsigned long lpar_rc;
1056
Santiago Leonf148f612010-09-03 18:29:30 +00001057restart_poll:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 do {
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001059 if (!ibmveth_rxq_pending_buffer(adapter))
1060 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
Anton Blanchardf89e49e2010-09-06 18:21:41 -07001062 smp_rmb();
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001063 if (!ibmveth_rxq_buffer_valid(adapter)) {
1064 wmb(); /* suggested by larson1 */
1065 adapter->rx_invalid_buffer++;
Santiago Leonc43ced12010-09-03 18:29:14 +00001066 netdev_dbg(netdev, "recycling invalid buffer\n");
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001067 ibmveth_rxq_recycle_buffer(adapter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 } else {
Santiago Leon8d86c612010-09-03 18:28:25 +00001069 struct sk_buff *skb, *new_skb;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001070 int length = ibmveth_rxq_frame_length(adapter);
1071 int offset = ibmveth_rxq_frame_offset(adapter);
Brian Kingf4ff2872007-09-15 13:36:07 -07001072 int csum_good = ibmveth_rxq_csum_good(adapter);
1073
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001074 skb = ibmveth_rxq_get_buffer(adapter);
1075
Santiago Leon8d86c612010-09-03 18:28:25 +00001076 new_skb = NULL;
1077 if (length < rx_copybreak)
1078 new_skb = netdev_alloc_skb(netdev, length);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001079
Santiago Leon8d86c612010-09-03 18:28:25 +00001080 if (new_skb) {
1081 skb_copy_to_linear_data(new_skb,
1082 skb->data + offset,
1083 length);
Santiago Leon0c26b672010-09-03 18:28:41 +00001084 if (rx_flush)
1085 ibmveth_flush_buffer(skb->data,
1086 length + offset);
Santiago Leon8d86c612010-09-03 18:28:25 +00001087 skb = new_skb;
1088 ibmveth_rxq_recycle_buffer(adapter);
1089 } else {
1090 ibmveth_rxq_harvest_buffer(adapter);
1091 skb_reserve(skb, offset);
1092 }
1093
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001094 skb_put(skb, length);
1095 skb->protocol = eth_type_trans(skb, netdev);
1096
Santiago Leon8d86c612010-09-03 18:28:25 +00001097 if (csum_good)
1098 skb->ip_summed = CHECKSUM_UNNECESSARY;
1099
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001100 netif_receive_skb(skb); /* send it up */
1101
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001102 netdev->stats.rx_packets++;
1103 netdev->stats.rx_bytes += length;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001104 frames_processed++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 }
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001106 } while (frames_processed < budget);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107
Santiago Leone2adbcb2005-10-26 10:47:08 -06001108 ibmveth_replenish_task(adapter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001110 if (frames_processed < budget) {
1111 /* We think we are done - reenable interrupts,
1112 * then check once more to make sure we are done.
1113 */
1114 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1115 VIO_IRQ_ENABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
Santiago Leon64859112010-09-03 18:29:41 +00001117 BUG_ON(lpar_rc != H_SUCCESS);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001118
Ben Hutchings288379f2009-01-19 16:43:59 -08001119 napi_complete(napi);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001120
1121 if (ibmveth_rxq_pending_buffer(adapter) &&
Ben Hutchings288379f2009-01-19 16:43:59 -08001122 napi_reschedule(napi)) {
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001123 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1124 VIO_IRQ_DISABLE);
1125 goto restart_poll;
1126 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 }
1128
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001129 return frames_processed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130}
1131
David Howells7d12e782006-10-05 14:55:46 +01001132static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
Jeff Garzikd7fbeba2006-05-24 01:31:14 -04001133{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 struct net_device *netdev = dev_instance;
Wang Chen4cf16532008-11-12 23:38:14 -08001135 struct ibmveth_adapter *adapter = netdev_priv(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 unsigned long lpar_rc;
1137
Ben Hutchings288379f2009-01-19 16:43:59 -08001138 if (napi_schedule_prep(&adapter->napi)) {
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001139 lpar_rc = h_vio_signal(adapter->vdev->unit_address,
1140 VIO_IRQ_DISABLE);
Santiago Leon64859112010-09-03 18:29:41 +00001141 BUG_ON(lpar_rc != H_SUCCESS);
Ben Hutchings288379f2009-01-19 16:43:59 -08001142 __napi_schedule(&adapter->napi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 }
1144 return IRQ_HANDLED;
1145}
1146
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147static void ibmveth_set_multicast_list(struct net_device *netdev)
1148{
Wang Chen4cf16532008-11-12 23:38:14 -08001149 struct ibmveth_adapter *adapter = netdev_priv(netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 unsigned long lpar_rc;
1151
Jiri Pirko4cd24ea2010-02-08 04:30:35 +00001152 if ((netdev->flags & IFF_PROMISC) ||
1153 (netdev_mc_count(netdev) > adapter->mcastFilterSize)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1155 IbmVethMcastEnableRecv |
1156 IbmVethMcastDisableFiltering,
1157 0);
Santiago Leonf148f612010-09-03 18:29:30 +00001158 if (lpar_rc != H_SUCCESS) {
Santiago Leon21c2dec2010-09-03 18:29:19 +00001159 netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
1160 "entering promisc mode\n", lpar_rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 }
1162 } else {
Jiri Pirko22bedad32010-04-01 21:22:57 +00001163 struct netdev_hw_addr *ha;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 /* clear the filter table & disable filtering */
1165 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1166 IbmVethMcastEnableRecv |
1167 IbmVethMcastDisableFiltering |
1168 IbmVethMcastClearFilterTable,
1169 0);
Santiago Leonf148f612010-09-03 18:29:30 +00001170 if (lpar_rc != H_SUCCESS) {
Santiago Leon21c2dec2010-09-03 18:29:19 +00001171 netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
1172 "attempting to clear filter table\n",
1173 lpar_rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 }
1175 /* add the addresses to the filter table */
Jiri Pirko22bedad32010-04-01 21:22:57 +00001176 netdev_for_each_mc_addr(ha, netdev) {
Santiago Leonf148f612010-09-03 18:29:30 +00001177 /* add the multicast address to the filter table */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 unsigned long mcast_addr = 0;
Jiri Pirko22bedad32010-04-01 21:22:57 +00001179 memcpy(((char *)&mcast_addr)+2, ha->addr, 6);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1181 IbmVethMcastAddFilter,
1182 mcast_addr);
Santiago Leonf148f612010-09-03 18:29:30 +00001183 if (lpar_rc != H_SUCCESS) {
Santiago Leon21c2dec2010-09-03 18:29:19 +00001184 netdev_err(netdev, "h_multicast_ctrl rc=%ld "
1185 "when adding an entry to the filter "
1186 "table\n", lpar_rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 }
1188 }
Jeff Garzikd7fbeba2006-05-24 01:31:14 -04001189
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 /* re-enable filtering */
1191 lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
1192 IbmVethMcastEnableFiltering,
1193 0);
Santiago Leonf148f612010-09-03 18:29:30 +00001194 if (lpar_rc != H_SUCCESS) {
Santiago Leon21c2dec2010-09-03 18:29:19 +00001195 netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
1196 "enabling filtering\n", lpar_rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 }
1198 }
1199}
1200
1201static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
1202{
Wang Chen4cf16532008-11-12 23:38:14 -08001203 struct ibmveth_adapter *adapter = netdev_priv(dev);
Robert Jennings1096d632008-07-24 04:34:52 +10001204 struct vio_dev *viodev = adapter->vdev;
Santiago Leon860f2422006-04-25 11:19:59 -05001205 int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
Robert Jennings0645bab2010-08-17 09:15:45 +00001206 int i, rc;
1207 int need_restart = 0;
Santiago Leonb6d35182005-10-26 10:47:01 -06001208
Santiago Leon517e80e2010-09-03 18:29:25 +00001209 if (new_mtu < IBMVETH_MIN_MTU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 return -EINVAL;
Santiago Leonb6d35182005-10-26 10:47:01 -06001211
Santiago Leon517e80e2010-09-03 18:29:25 +00001212 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
Brian Kingce6eea52007-06-08 14:05:17 -05001213 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
1214 break;
1215
Santiago Leon517e80e2010-09-03 18:29:25 +00001216 if (i == IBMVETH_NUM_BUFF_POOLS)
Brian Kingce6eea52007-06-08 14:05:17 -05001217 return -EINVAL;
1218
Santiago Leonea866e62008-07-24 04:34:23 +10001219 /* Deactivate all the buffer pools so that the next loop can activate
1220 only the buffer pools necessary to hold the new MTU */
Robert Jennings0645bab2010-08-17 09:15:45 +00001221 if (netif_running(adapter->netdev)) {
1222 need_restart = 1;
1223 adapter->pool_config = 1;
1224 ibmveth_close(adapter->netdev);
1225 adapter->pool_config = 0;
1226 }
Brian Kingce6eea52007-06-08 14:05:17 -05001227
Santiago Leonea866e62008-07-24 04:34:23 +10001228 /* Look for an active buffer pool that can hold the new MTU */
Santiago Leonf148f612010-09-03 18:29:30 +00001229 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
Santiago Leonea866e62008-07-24 04:34:23 +10001230 adapter->rx_buff_pool[i].active = 1;
1231
Santiago Leon860f2422006-04-25 11:19:59 -05001232 if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
Robert Jennings1096d632008-07-24 04:34:52 +10001233 dev->mtu = new_mtu;
1234 vio_cmo_set_dev_desired(viodev,
1235 ibmveth_get_desired_dma
1236 (viodev));
Robert Jennings0645bab2010-08-17 09:15:45 +00001237 if (need_restart) {
1238 return ibmveth_open(adapter->netdev);
1239 }
Santiago Leon860f2422006-04-25 11:19:59 -05001240 return 0;
Santiago Leonb6d35182005-10-26 10:47:01 -06001241 }
Santiago Leonb6d35182005-10-26 10:47:01 -06001242 }
Robert Jennings0645bab2010-08-17 09:15:45 +00001243
1244 if (need_restart && (rc = ibmveth_open(adapter->netdev)))
1245 return rc;
1246
Santiago Leon860f2422006-04-25 11:19:59 -05001247 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248}
1249
Santiago Leon6b422372006-10-03 12:24:28 -05001250#ifdef CONFIG_NET_POLL_CONTROLLER
1251static void ibmveth_poll_controller(struct net_device *dev)
1252{
Wang Chen4cf16532008-11-12 23:38:14 -08001253 ibmveth_replenish_task(netdev_priv(dev));
Andrew Morton5f771132006-10-10 14:33:30 -07001254 ibmveth_interrupt(dev->irq, dev);
Santiago Leon6b422372006-10-03 12:24:28 -05001255}
1256#endif
1257
Robert Jennings1096d632008-07-24 04:34:52 +10001258/**
1259 * ibmveth_get_desired_dma - Calculate IO memory desired by the driver
1260 *
1261 * @vdev: struct vio_dev for the device whose desired IO mem is to be returned
1262 *
1263 * Return value:
1264 * Number of bytes of IO data the driver will need to perform well.
1265 */
1266static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev)
1267{
1268 struct net_device *netdev = dev_get_drvdata(&vdev->dev);
1269 struct ibmveth_adapter *adapter;
1270 unsigned long ret;
1271 int i;
1272 int rxqentries = 1;
1273
1274 /* netdev inits at probe time along with the structures we need below*/
1275 if (netdev == NULL)
1276 return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT);
1277
1278 adapter = netdev_priv(netdev);
1279
1280 ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE;
1281 ret += IOMMU_PAGE_ALIGN(netdev->mtu);
1282
Santiago Leon517e80e2010-09-03 18:29:25 +00001283 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
Robert Jennings1096d632008-07-24 04:34:52 +10001284 /* add the size of the active receive buffers */
1285 if (adapter->rx_buff_pool[i].active)
1286 ret +=
1287 adapter->rx_buff_pool[i].size *
1288 IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i].
1289 buff_size);
1290 rxqentries += adapter->rx_buff_pool[i].size;
1291 }
1292 /* add the size of the receive queue entries */
1293 ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry));
1294
1295 return ret;
1296}
1297
Alexander Beregalove186d172009-04-15 12:52:39 +00001298static const struct net_device_ops ibmveth_netdev_ops = {
1299 .ndo_open = ibmveth_open,
1300 .ndo_stop = ibmveth_close,
1301 .ndo_start_xmit = ibmveth_start_xmit,
1302 .ndo_set_multicast_list = ibmveth_set_multicast_list,
1303 .ndo_do_ioctl = ibmveth_ioctl,
1304 .ndo_change_mtu = ibmveth_change_mtu,
Michał Mirosławb9367bf2011-04-19 02:14:25 +00001305 .ndo_fix_features = ibmveth_fix_features,
1306 .ndo_set_features = ibmveth_set_features,
Alexander Beregalove186d172009-04-15 12:52:39 +00001307 .ndo_validate_addr = eth_validate_addr,
1308 .ndo_set_mac_address = eth_mac_addr,
1309#ifdef CONFIG_NET_POLL_CONTROLLER
1310 .ndo_poll_controller = ibmveth_poll_controller,
1311#endif
1312};
1313
Santiago Leonf148f612010-09-03 18:29:30 +00001314static int __devinit ibmveth_probe(struct vio_dev *dev,
1315 const struct vio_device_id *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316{
Santiago Leonb6d35182005-10-26 10:47:01 -06001317 int rc, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 struct net_device *netdev;
Mariusz Kozlowski9dc83af2007-08-06 23:44:03 +02001319 struct ibmveth_adapter *adapter;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 unsigned char *mac_addr_p;
1321 unsigned int *mcastFilterSize_p;
1322
Santiago Leonc43ced12010-09-03 18:29:14 +00001323 dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n",
1324 dev->unit_address);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325
Santiago Leonf148f612010-09-03 18:29:30 +00001326 mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR,
1327 NULL);
1328 if (!mac_addr_p) {
Santiago Leon21c2dec2010-09-03 18:29:19 +00001329 dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n");
Santiago Leonbe35ae92010-09-03 18:29:36 +00001330 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 }
Jeff Garzikd7fbeba2006-05-24 01:31:14 -04001332
Santiago Leonf148f612010-09-03 18:29:30 +00001333 mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev,
Michael Ellerman493a6842007-04-17 13:12:55 +10001334 VETH_MCAST_FILTER_SIZE, NULL);
Santiago Leonf148f612010-09-03 18:29:30 +00001335 if (!mcastFilterSize_p) {
Santiago Leon21c2dec2010-09-03 18:29:19 +00001336 dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE "
1337 "attribute\n");
Santiago Leonbe35ae92010-09-03 18:29:36 +00001338 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 }
Jeff Garzikd7fbeba2006-05-24 01:31:14 -04001340
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
1342
Santiago Leonf148f612010-09-03 18:29:30 +00001343 if (!netdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 return -ENOMEM;
1345
Wang Chen4cf16532008-11-12 23:38:14 -08001346 adapter = netdev_priv(netdev);
Greg Kroah-Hartmanc7ae0112009-05-04 21:33:19 -07001347 dev_set_drvdata(&dev->dev, netdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348
1349 adapter->vdev = dev;
1350 adapter->netdev = netdev;
Santiago Leonf148f612010-09-03 18:29:30 +00001351 adapter->mcastFilterSize = *mcastFilterSize_p;
Santiago Leon860f2422006-04-25 11:19:59 -05001352 adapter->pool_config = 0;
Jeff Garzikd7fbeba2006-05-24 01:31:14 -04001353
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001354 netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
1355
Santiago Leonf148f612010-09-03 18:29:30 +00001356 /*
1357 * Some older boxes running PHYP non-natively have an OF that returns
1358 * a 8-byte local-mac-address field (and the first 2 bytes have to be
1359 * ignored) while newer boxes' OF return a 6-byte field. Note that
1360 * IEEE 1275 specifies that local-mac-address must be a 6-byte field.
1361 * The RPA doc specifies that the first byte must be 10b, so we'll
1362 * just look for it to solve this 8 vs. 6 byte field issue
1363 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 if ((*mac_addr_p & 0x3) != 0x02)
1365 mac_addr_p += 2;
1366
1367 adapter->mac_addr = 0;
1368 memcpy(&adapter->mac_addr, mac_addr_p, 6);
1369
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 netdev->irq = dev->irq;
Alexander Beregalove186d172009-04-15 12:52:39 +00001371 netdev->netdev_ops = &ibmveth_netdev_ops;
1372 netdev->ethtool_ops = &netdev_ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 SET_NETDEV_DEV(netdev, &dev->dev);
Michał Mirosławb9367bf2011-04-19 02:14:25 +00001374 netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
1375 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1376 netdev->features |= netdev->hw_features;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377
Stephen Rothwelld44b5e02009-05-11 21:44:51 +00001378 memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379
Santiago Leonf148f612010-09-03 18:29:30 +00001380 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
Santiago Leon860f2422006-04-25 11:19:59 -05001381 struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
Greg Kroah-Hartman8dde2a92007-12-17 15:54:39 -04001382 int error;
1383
Jeff Garzikd7fbeba2006-05-24 01:31:14 -04001384 ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
1385 pool_count[i], pool_size[i],
Santiago Leon860f2422006-04-25 11:19:59 -05001386 pool_active[i]);
Greg Kroah-Hartman8dde2a92007-12-17 15:54:39 -04001387 error = kobject_init_and_add(kobj, &ktype_veth_pool,
1388 &dev->dev.kobj, "pool%d", i);
1389 if (!error)
1390 kobject_uevent(kobj, KOBJ_ADD);
Santiago Leon860f2422006-04-25 11:19:59 -05001391 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392
Santiago Leonc43ced12010-09-03 18:29:14 +00001393 netdev_dbg(netdev, "adapter @ 0x%p\n", adapter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395 adapter->buffer_list_dma = DMA_ERROR_CODE;
1396 adapter->filter_list_dma = DMA_ERROR_CODE;
1397 adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
1398
Santiago Leonc43ced12010-09-03 18:29:14 +00001399 netdev_dbg(netdev, "registering netdev...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400
Michał Mirosławb801a4e2011-04-28 11:59:15 +10001401 ibmveth_set_features(netdev, netdev->features);
1402
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403 rc = register_netdev(netdev);
1404
Santiago Leonf148f612010-09-03 18:29:30 +00001405 if (rc) {
Santiago Leonc43ced12010-09-03 18:29:14 +00001406 netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 free_netdev(netdev);
1408 return rc;
1409 }
1410
Santiago Leonc43ced12010-09-03 18:29:14 +00001411 netdev_dbg(netdev, "registered\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 return 0;
1414}
1415
1416static int __devexit ibmveth_remove(struct vio_dev *dev)
1417{
Greg Kroah-Hartmanc7ae0112009-05-04 21:33:19 -07001418 struct net_device *netdev = dev_get_drvdata(&dev->dev);
Wang Chen4cf16532008-11-12 23:38:14 -08001419 struct ibmveth_adapter *adapter = netdev_priv(netdev);
Santiago Leon860f2422006-04-25 11:19:59 -05001420 int i;
1421
Santiago Leonf148f612010-09-03 18:29:30 +00001422 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
Greg Kroah-Hartmanc10997f2007-12-20 08:13:05 -08001423 kobject_put(&adapter->rx_buff_pool[i].kobj);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424
1425 unregister_netdev(netdev);
1426
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 free_netdev(netdev);
Robert Jennings1096d632008-07-24 04:34:52 +10001428 dev_set_drvdata(&dev->dev, NULL);
1429
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 return 0;
1431}
1432
Santiago Leon860f2422006-04-25 11:19:59 -05001433static struct attribute veth_active_attr;
1434static struct attribute veth_num_attr;
1435static struct attribute veth_size_attr;
1436
Santiago Leonf148f612010-09-03 18:29:30 +00001437static ssize_t veth_pool_show(struct kobject *kobj,
1438 struct attribute *attr, char *buf)
Santiago Leon860f2422006-04-25 11:19:59 -05001439{
Jeff Garzikd7fbeba2006-05-24 01:31:14 -04001440 struct ibmveth_buff_pool *pool = container_of(kobj,
Santiago Leon860f2422006-04-25 11:19:59 -05001441 struct ibmveth_buff_pool,
1442 kobj);
1443
1444 if (attr == &veth_active_attr)
1445 return sprintf(buf, "%d\n", pool->active);
1446 else if (attr == &veth_num_attr)
1447 return sprintf(buf, "%d\n", pool->size);
1448 else if (attr == &veth_size_attr)
1449 return sprintf(buf, "%d\n", pool->buff_size);
1450 return 0;
1451}
1452
Santiago Leonf148f612010-09-03 18:29:30 +00001453static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr,
1454 const char *buf, size_t count)
Santiago Leon860f2422006-04-25 11:19:59 -05001455{
Jeff Garzikd7fbeba2006-05-24 01:31:14 -04001456 struct ibmveth_buff_pool *pool = container_of(kobj,
Santiago Leon860f2422006-04-25 11:19:59 -05001457 struct ibmveth_buff_pool,
1458 kobj);
Greg Kroah-Hartmanc7ae0112009-05-04 21:33:19 -07001459 struct net_device *netdev = dev_get_drvdata(
1460 container_of(kobj->parent, struct device, kobj));
Wang Chen4cf16532008-11-12 23:38:14 -08001461 struct ibmveth_adapter *adapter = netdev_priv(netdev);
Santiago Leon860f2422006-04-25 11:19:59 -05001462 long value = simple_strtol(buf, NULL, 10);
1463 long rc;
1464
1465 if (attr == &veth_active_attr) {
1466 if (value && !pool->active) {
Brian King4aa9c932007-06-08 14:05:16 -05001467 if (netif_running(netdev)) {
Santiago Leonf148f612010-09-03 18:29:30 +00001468 if (ibmveth_alloc_buffer_pool(pool)) {
Santiago Leon21c2dec2010-09-03 18:29:19 +00001469 netdev_err(netdev,
1470 "unable to alloc pool\n");
Brian King4aa9c932007-06-08 14:05:16 -05001471 return -ENOMEM;
1472 }
1473 pool->active = 1;
1474 adapter->pool_config = 1;
1475 ibmveth_close(netdev);
1476 adapter->pool_config = 0;
1477 if ((rc = ibmveth_open(netdev)))
1478 return rc;
Santiago Leonf148f612010-09-03 18:29:30 +00001479 } else {
Brian King4aa9c932007-06-08 14:05:16 -05001480 pool->active = 1;
Santiago Leonf148f612010-09-03 18:29:30 +00001481 }
Santiago Leon860f2422006-04-25 11:19:59 -05001482 } else if (!value && pool->active) {
1483 int mtu = netdev->mtu + IBMVETH_BUFF_OH;
1484 int i;
1485 /* Make sure there is a buffer pool with buffers that
1486 can hold a packet of the size of the MTU */
Santiago Leon517e80e2010-09-03 18:29:25 +00001487 for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
Santiago Leon860f2422006-04-25 11:19:59 -05001488 if (pool == &adapter->rx_buff_pool[i])
1489 continue;
1490 if (!adapter->rx_buff_pool[i].active)
1491 continue;
Brian King76b9cfc2007-08-03 13:55:19 +10001492 if (mtu <= adapter->rx_buff_pool[i].buff_size)
1493 break;
Santiago Leon860f2422006-04-25 11:19:59 -05001494 }
Brian King76b9cfc2007-08-03 13:55:19 +10001495
Santiago Leon517e80e2010-09-03 18:29:25 +00001496 if (i == IBMVETH_NUM_BUFF_POOLS) {
Santiago Leon21c2dec2010-09-03 18:29:19 +00001497 netdev_err(netdev, "no active pool >= MTU\n");
Santiago Leon860f2422006-04-25 11:19:59 -05001498 return -EPERM;
1499 }
Brian King76b9cfc2007-08-03 13:55:19 +10001500
Brian King76b9cfc2007-08-03 13:55:19 +10001501 if (netif_running(netdev)) {
1502 adapter->pool_config = 1;
1503 ibmveth_close(netdev);
Santiago Leonea866e62008-07-24 04:34:23 +10001504 pool->active = 0;
Brian King76b9cfc2007-08-03 13:55:19 +10001505 adapter->pool_config = 0;
1506 if ((rc = ibmveth_open(netdev)))
1507 return rc;
1508 }
Santiago Leonea866e62008-07-24 04:34:23 +10001509 pool->active = 0;
Santiago Leon860f2422006-04-25 11:19:59 -05001510 }
1511 } else if (attr == &veth_num_attr) {
Santiago Leonf148f612010-09-03 18:29:30 +00001512 if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) {
Santiago Leon860f2422006-04-25 11:19:59 -05001513 return -EINVAL;
Santiago Leonf148f612010-09-03 18:29:30 +00001514 } else {
Brian King4aa9c932007-06-08 14:05:16 -05001515 if (netif_running(netdev)) {
1516 adapter->pool_config = 1;
1517 ibmveth_close(netdev);
1518 adapter->pool_config = 0;
1519 pool->size = value;
1520 if ((rc = ibmveth_open(netdev)))
1521 return rc;
Santiago Leonf148f612010-09-03 18:29:30 +00001522 } else {
Brian King4aa9c932007-06-08 14:05:16 -05001523 pool->size = value;
Santiago Leonf148f612010-09-03 18:29:30 +00001524 }
Santiago Leon860f2422006-04-25 11:19:59 -05001525 }
1526 } else if (attr == &veth_size_attr) {
Santiago Leonf148f612010-09-03 18:29:30 +00001527 if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) {
Santiago Leon860f2422006-04-25 11:19:59 -05001528 return -EINVAL;
Santiago Leonf148f612010-09-03 18:29:30 +00001529 } else {
Brian King4aa9c932007-06-08 14:05:16 -05001530 if (netif_running(netdev)) {
1531 adapter->pool_config = 1;
1532 ibmveth_close(netdev);
1533 adapter->pool_config = 0;
1534 pool->buff_size = value;
1535 if ((rc = ibmveth_open(netdev)))
1536 return rc;
Santiago Leonf148f612010-09-03 18:29:30 +00001537 } else {
Brian King4aa9c932007-06-08 14:05:16 -05001538 pool->buff_size = value;
Santiago Leonf148f612010-09-03 18:29:30 +00001539 }
Santiago Leon860f2422006-04-25 11:19:59 -05001540 }
1541 }
1542
1543 /* kick the interrupt handler to allocate/deallocate pools */
David Howells7d12e782006-10-05 14:55:46 +01001544 ibmveth_interrupt(netdev->irq, netdev);
Santiago Leon860f2422006-04-25 11:19:59 -05001545 return count;
1546}
1547
1548
Santiago Leonf148f612010-09-03 18:29:30 +00001549#define ATTR(_name, _mode) \
1550 struct attribute veth_##_name##_attr = { \
1551 .name = __stringify(_name), .mode = _mode, \
1552 };
Santiago Leon860f2422006-04-25 11:19:59 -05001553
1554static ATTR(active, 0644);
1555static ATTR(num, 0644);
1556static ATTR(size, 0644);
1557
Santiago Leonf148f612010-09-03 18:29:30 +00001558static struct attribute *veth_pool_attrs[] = {
Santiago Leon860f2422006-04-25 11:19:59 -05001559 &veth_active_attr,
1560 &veth_num_attr,
1561 &veth_size_attr,
1562 NULL,
1563};
1564
Emese Revfy52cf25d2010-01-19 02:58:23 +01001565static const struct sysfs_ops veth_pool_ops = {
Santiago Leon860f2422006-04-25 11:19:59 -05001566 .show = veth_pool_show,
1567 .store = veth_pool_store,
1568};
1569
1570static struct kobj_type ktype_veth_pool = {
1571 .release = NULL,
1572 .sysfs_ops = &veth_pool_ops,
1573 .default_attrs = veth_pool_attrs,
1574};
1575
Brian Kinge7a3af52010-05-07 08:56:08 +00001576static int ibmveth_resume(struct device *dev)
1577{
1578 struct net_device *netdev = dev_get_drvdata(dev);
1579 ibmveth_interrupt(netdev->irq, netdev);
1580 return 0;
1581}
Santiago Leon860f2422006-04-25 11:19:59 -05001582
Santiago Leonf148f612010-09-03 18:29:30 +00001583static struct vio_device_id ibmveth_device_table[] __devinitdata = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584 { "network", "IBM,l-lan"},
Stephen Rothwellfb120da2005-08-17 16:42:59 +10001585 { "", "" }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586};
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
1588
Brian Kinge7a3af52010-05-07 08:56:08 +00001589static struct dev_pm_ops ibmveth_pm_ops = {
1590 .resume = ibmveth_resume
1591};
1592
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593static struct vio_driver ibmveth_driver = {
Stephen Rothwell6fdf5392005-10-24 14:53:21 +10001594 .id_table = ibmveth_device_table,
1595 .probe = ibmveth_probe,
1596 .remove = ibmveth_remove,
Robert Jennings1096d632008-07-24 04:34:52 +10001597 .get_desired_dma = ibmveth_get_desired_dma,
Stephen Rothwell6fdf5392005-10-24 14:53:21 +10001598 .driver = {
1599 .name = ibmveth_driver_name,
Stephen Rothwell915124d2005-10-24 15:12:22 +10001600 .owner = THIS_MODULE,
Brian Kinge7a3af52010-05-07 08:56:08 +00001601 .pm = &ibmveth_pm_ops,
Stephen Rothwell6fdf5392005-10-24 14:53:21 +10001602 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603};
1604
1605static int __init ibmveth_module_init(void)
1606{
Santiago Leon21c2dec2010-09-03 18:29:19 +00001607 printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name,
1608 ibmveth_driver_string, ibmveth_driver_version);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610 return vio_register_driver(&ibmveth_driver);
1611}
1612
1613static void __exit ibmveth_module_exit(void)
1614{
1615 vio_unregister_driver(&ibmveth_driver);
Jeff Garzikd7fbeba2006-05-24 01:31:14 -04001616}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617
1618module_init(ibmveth_module_init);
1619module_exit(ibmveth_module_exit);