1 /**************************************************************************/
3 /* IBM eServer i/pSeries Virtual Ethernet Device Driver */
4 /* Copyright (C) 2003 IBM Corp. */
5 /* Originally written by Dave Larson (larson1@us.ibm.com) */
6 /* Maintained by Santiago Leon (santil@us.ibm.com) */
8 /* This program is free software; you can redistribute it and/or modify */
9 /* it under the terms of the GNU General Public License as published by */
10 /* the Free Software Foundation; either version 2 of the License, or */
11 /* (at your option) any later version. */
13 /* This program is distributed in the hope that it will be useful, */
14 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
15 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
16 /* GNU General Public License for more details. */
18 /* You should have received a copy of the GNU General Public License */
19 /* along with this program; if not, write to the Free Software */
20 /* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 */
23 /* This module contains the implementation of a virtual ethernet device */
24 /* for use with IBM i/pSeries LPAR Linux. It utilizes the logical LAN */
25 /* option of the RS/6000 Platform Architechture to interface with virtual */
26 /* ethernet NICs that are presented to the partition by the hypervisor. */
28 /**************************************************************************/
31 - remove frag processing code - no longer needed
32 - add support for sysfs
33 - possibly remove procfs support
36 #include <linux/config.h>
37 #include <linux/module.h>
38 #include <linux/version.h>
39 #include <linux/types.h>
40 #include <linux/errno.h>
41 #include <linux/ioport.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/kernel.h>
44 #include <linux/netdevice.h>
45 #include <linux/etherdevice.h>
46 #include <linux/skbuff.h>
47 #include <linux/init.h>
48 #include <linux/delay.h>
50 #include <linux/ethtool.h>
51 #include <linux/proc_fs.h>
52 #include <asm/semaphore.h>
53 #include <asm/hvcall.h>
54 #include <asm/atomic.h>
55 #include <asm/iommu.h>
57 #include <asm/uaccess.h>
58 #include <linux/seq_file.h>
64 #define ibmveth_printk(fmt, args...) \
65 printk(KERN_INFO "%s: " fmt, __FILE__, ## args)
67 #define ibmveth_error_printk(fmt, args...) \
68 printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
71 #define ibmveth_debug_printk_no_adapter(fmt, args...) \
72 printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
73 #define ibmveth_debug_printk(fmt, args...) \
74 printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
75 #define ibmveth_assert(expr) \
77 printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
81 #define ibmveth_debug_printk_no_adapter(fmt, args...)
82 #define ibmveth_debug_printk(fmt, args...)
83 #define ibmveth_assert(expr)
86 static int ibmveth_open(struct net_device
*dev
);
87 static int ibmveth_close(struct net_device
*dev
);
88 static int ibmveth_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
);
89 static int ibmveth_poll(struct net_device
*dev
, int *budget
);
90 static int ibmveth_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
91 static struct net_device_stats
*ibmveth_get_stats(struct net_device
*dev
);
92 static void ibmveth_set_multicast_list(struct net_device
*dev
);
93 static int ibmveth_change_mtu(struct net_device
*dev
, int new_mtu
);
94 static void ibmveth_proc_register_driver(void);
95 static void ibmveth_proc_unregister_driver(void);
96 static void ibmveth_proc_register_adapter(struct ibmveth_adapter
*adapter
);
97 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter
*adapter
);
98 static irqreturn_t
ibmveth_interrupt(int irq
, void *dev_instance
, struct pt_regs
*regs
);
99 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter
*adapter
);
101 #ifdef CONFIG_PROC_FS
102 #define IBMVETH_PROC_DIR "net/ibmveth"
103 static struct proc_dir_entry
*ibmveth_proc_dir
;
106 static const char ibmveth_driver_name
[] = "ibmveth";
107 static const char ibmveth_driver_string
[] = "IBM i/pSeries Virtual Ethernet Driver";
108 #define ibmveth_driver_version "1.03"
110 MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
111 MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
112 MODULE_LICENSE("GPL");
113 MODULE_VERSION(ibmveth_driver_version
);
115 /* simple methods of getting data from the current rxq entry */
116 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter
*adapter
)
118 return (adapter
->rx_queue
.queue_addr
[adapter
->rx_queue
.index
].toggle
== adapter
->rx_queue
.toggle
);
121 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter
*adapter
)
123 return (adapter
->rx_queue
.queue_addr
[adapter
->rx_queue
.index
].valid
);
126 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter
*adapter
)
128 return (adapter
->rx_queue
.queue_addr
[adapter
->rx_queue
.index
].offset
);
131 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter
*adapter
)
133 return (adapter
->rx_queue
.queue_addr
[adapter
->rx_queue
.index
].length
);
136 /* setup the initial settings for a buffer pool */
137 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool
*pool
, u32 pool_index
, u32 pool_size
, u32 buff_size
)
139 pool
->size
= pool_size
;
140 pool
->index
= pool_index
;
141 pool
->buff_size
= buff_size
;
142 pool
->threshold
= pool_size
/ 2;
145 /* allocate and setup an buffer pool - called during open */
146 static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool
*pool
)
150 pool
->free_map
= kmalloc(sizeof(u16
) * pool
->size
, GFP_KERNEL
);
152 if(!pool
->free_map
) {
156 pool
->dma_addr
= kmalloc(sizeof(dma_addr_t
) * pool
->size
, GFP_KERNEL
);
157 if(!pool
->dma_addr
) {
158 kfree(pool
->free_map
);
159 pool
->free_map
= NULL
;
163 pool
->skbuff
= kmalloc(sizeof(void*) * pool
->size
, GFP_KERNEL
);
166 kfree(pool
->dma_addr
);
167 pool
->dma_addr
= NULL
;
169 kfree(pool
->free_map
);
170 pool
->free_map
= NULL
;
174 memset(pool
->skbuff
, 0, sizeof(void*) * pool
->size
);
175 memset(pool
->dma_addr
, 0, sizeof(dma_addr_t
) * pool
->size
);
177 for(i
= 0; i
< pool
->size
; ++i
) {
178 pool
->free_map
[i
] = i
;
181 atomic_set(&pool
->available
, 0);
182 pool
->producer_index
= 0;
183 pool
->consumer_index
= 0;
189 /* replenish the buffers for a pool. note that we don't need to
190 * skb_reserve these since they are used for incoming...
192 static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter
*adapter
, struct ibmveth_buff_pool
*pool
)
195 u32 count
= pool
->size
- atomic_read(&pool
->available
);
196 u32 buffers_added
= 0;
200 for(i
= 0; i
< count
; ++i
) {
202 unsigned int free_index
, index
;
204 union ibmveth_buf_desc desc
;
205 unsigned long lpar_rc
;
208 skb
= alloc_skb(pool
->buff_size
, GFP_ATOMIC
);
211 ibmveth_debug_printk("replenish: unable to allocate skb\n");
212 adapter
->replenish_no_mem
++;
216 free_index
= pool
->consumer_index
++ % pool
->size
;
217 index
= pool
->free_map
[free_index
];
219 ibmveth_assert(index
!= IBM_VETH_INVALID_MAP
);
220 ibmveth_assert(pool
->skbuff
[index
] == NULL
);
222 dma_addr
= dma_map_single(&adapter
->vdev
->dev
, skb
->data
,
223 pool
->buff_size
, DMA_FROM_DEVICE
);
225 pool
->free_map
[free_index
] = IBM_VETH_INVALID_MAP
;
226 pool
->dma_addr
[index
] = dma_addr
;
227 pool
->skbuff
[index
] = skb
;
229 correlator
= ((u64
)pool
->index
<< 32) | index
;
230 *(u64
*)skb
->data
= correlator
;
233 desc
.fields
.valid
= 1;
234 desc
.fields
.length
= pool
->buff_size
;
235 desc
.fields
.address
= dma_addr
;
237 lpar_rc
= h_add_logical_lan_buffer(adapter
->vdev
->unit_address
, desc
.desc
);
239 if(lpar_rc
!= H_Success
) {
240 pool
->free_map
[free_index
] = index
;
241 pool
->skbuff
[index
] = NULL
;
242 pool
->consumer_index
--;
243 dma_unmap_single(&adapter
->vdev
->dev
,
244 pool
->dma_addr
[index
], pool
->buff_size
,
246 dev_kfree_skb_any(skb
);
247 adapter
->replenish_add_buff_failure
++;
251 adapter
->replenish_add_buff_success
++;
256 atomic_add(buffers_added
, &(pool
->available
));
259 /* replenish routine */
260 static void ibmveth_replenish_task(struct ibmveth_adapter
*adapter
)
264 adapter
->replenish_task_cycles
++;
266 for(i
= 0; i
< IbmVethNumBufferPools
; i
++)
267 if(adapter
->rx_buff_pool
[i
].active
)
268 ibmveth_replenish_buffer_pool(adapter
,
269 &adapter
->rx_buff_pool
[i
]);
271 adapter
->rx_no_buffer
= *(u64
*)(((char*)adapter
->buffer_list_addr
) + 4096 - 8);
274 /* empty and free ana buffer pool - also used to do cleanup in error paths */
275 static void ibmveth_free_buffer_pool(struct ibmveth_adapter
*adapter
, struct ibmveth_buff_pool
*pool
)
279 kfree(pool
->free_map
);
280 pool
->free_map
= NULL
;
282 if(pool
->skbuff
&& pool
->dma_addr
) {
283 for(i
= 0; i
< pool
->size
; ++i
) {
284 struct sk_buff
*skb
= pool
->skbuff
[i
];
286 dma_unmap_single(&adapter
->vdev
->dev
,
290 dev_kfree_skb_any(skb
);
291 pool
->skbuff
[i
] = NULL
;
297 kfree(pool
->dma_addr
);
298 pool
->dma_addr
= NULL
;
308 /* remove a buffer from a pool */
309 static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter
*adapter
, u64 correlator
)
311 unsigned int pool
= correlator
>> 32;
312 unsigned int index
= correlator
& 0xffffffffUL
;
313 unsigned int free_index
;
316 ibmveth_assert(pool
< IbmVethNumBufferPools
);
317 ibmveth_assert(index
< adapter
->rx_buff_pool
[pool
].size
);
319 skb
= adapter
->rx_buff_pool
[pool
].skbuff
[index
];
321 ibmveth_assert(skb
!= NULL
);
323 adapter
->rx_buff_pool
[pool
].skbuff
[index
] = NULL
;
325 dma_unmap_single(&adapter
->vdev
->dev
,
326 adapter
->rx_buff_pool
[pool
].dma_addr
[index
],
327 adapter
->rx_buff_pool
[pool
].buff_size
,
330 free_index
= adapter
->rx_buff_pool
[pool
].producer_index
++ % adapter
->rx_buff_pool
[pool
].size
;
331 adapter
->rx_buff_pool
[pool
].free_map
[free_index
] = index
;
335 atomic_dec(&(adapter
->rx_buff_pool
[pool
].available
));
338 /* get the current buffer on the rx queue */
339 static inline struct sk_buff
*ibmveth_rxq_get_buffer(struct ibmveth_adapter
*adapter
)
341 u64 correlator
= adapter
->rx_queue
.queue_addr
[adapter
->rx_queue
.index
].correlator
;
342 unsigned int pool
= correlator
>> 32;
343 unsigned int index
= correlator
& 0xffffffffUL
;
345 ibmveth_assert(pool
< IbmVethNumBufferPools
);
346 ibmveth_assert(index
< adapter
->rx_buff_pool
[pool
].size
);
348 return adapter
->rx_buff_pool
[pool
].skbuff
[index
];
351 /* recycle the current buffer on the rx queue */
352 static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter
*adapter
)
354 u32 q_index
= adapter
->rx_queue
.index
;
355 u64 correlator
= adapter
->rx_queue
.queue_addr
[q_index
].correlator
;
356 unsigned int pool
= correlator
>> 32;
357 unsigned int index
= correlator
& 0xffffffffUL
;
358 union ibmveth_buf_desc desc
;
359 unsigned long lpar_rc
;
361 ibmveth_assert(pool
< IbmVethNumBufferPools
);
362 ibmveth_assert(index
< adapter
->rx_buff_pool
[pool
].size
);
364 if(!adapter
->rx_buff_pool
[pool
].active
) {
365 ibmveth_rxq_harvest_buffer(adapter
);
366 ibmveth_free_buffer_pool(adapter
, &adapter
->rx_buff_pool
[pool
]);
371 desc
.fields
.valid
= 1;
372 desc
.fields
.length
= adapter
->rx_buff_pool
[pool
].buff_size
;
373 desc
.fields
.address
= adapter
->rx_buff_pool
[pool
].dma_addr
[index
];
375 lpar_rc
= h_add_logical_lan_buffer(adapter
->vdev
->unit_address
, desc
.desc
);
377 if(lpar_rc
!= H_Success
) {
378 ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc
);
379 ibmveth_remove_buffer_from_pool(adapter
, adapter
->rx_queue
.queue_addr
[adapter
->rx_queue
.index
].correlator
);
382 if(++adapter
->rx_queue
.index
== adapter
->rx_queue
.num_slots
) {
383 adapter
->rx_queue
.index
= 0;
384 adapter
->rx_queue
.toggle
= !adapter
->rx_queue
.toggle
;
388 static inline void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter
*adapter
)
390 ibmveth_remove_buffer_from_pool(adapter
, adapter
->rx_queue
.queue_addr
[adapter
->rx_queue
.index
].correlator
);
392 if(++adapter
->rx_queue
.index
== adapter
->rx_queue
.num_slots
) {
393 adapter
->rx_queue
.index
= 0;
394 adapter
->rx_queue
.toggle
= !adapter
->rx_queue
.toggle
;
398 static void ibmveth_cleanup(struct ibmveth_adapter
*adapter
)
402 if(adapter
->buffer_list_addr
!= NULL
) {
403 if(!dma_mapping_error(adapter
->buffer_list_dma
)) {
404 dma_unmap_single(&adapter
->vdev
->dev
,
405 adapter
->buffer_list_dma
, 4096,
407 adapter
->buffer_list_dma
= DMA_ERROR_CODE
;
409 free_page((unsigned long)adapter
->buffer_list_addr
);
410 adapter
->buffer_list_addr
= NULL
;
413 if(adapter
->filter_list_addr
!= NULL
) {
414 if(!dma_mapping_error(adapter
->filter_list_dma
)) {
415 dma_unmap_single(&adapter
->vdev
->dev
,
416 adapter
->filter_list_dma
, 4096,
418 adapter
->filter_list_dma
= DMA_ERROR_CODE
;
420 free_page((unsigned long)adapter
->filter_list_addr
);
421 adapter
->filter_list_addr
= NULL
;
424 if(adapter
->rx_queue
.queue_addr
!= NULL
) {
425 if(!dma_mapping_error(adapter
->rx_queue
.queue_dma
)) {
426 dma_unmap_single(&adapter
->vdev
->dev
,
427 adapter
->rx_queue
.queue_dma
,
428 adapter
->rx_queue
.queue_len
,
430 adapter
->rx_queue
.queue_dma
= DMA_ERROR_CODE
;
432 kfree(adapter
->rx_queue
.queue_addr
);
433 adapter
->rx_queue
.queue_addr
= NULL
;
436 for(i
= 0; i
<IbmVethNumBufferPools
; i
++)
437 ibmveth_free_buffer_pool(adapter
, &adapter
->rx_buff_pool
[i
]);
440 static int ibmveth_open(struct net_device
*netdev
)
442 struct ibmveth_adapter
*adapter
= netdev
->priv
;
445 unsigned long lpar_rc
;
447 union ibmveth_buf_desc rxq_desc
;
450 ibmveth_debug_printk("open starting\n");
452 for(i
= 0; i
<IbmVethNumBufferPools
; i
++)
453 rxq_entries
+= adapter
->rx_buff_pool
[i
].size
;
455 adapter
->buffer_list_addr
= (void*) get_zeroed_page(GFP_KERNEL
);
456 adapter
->filter_list_addr
= (void*) get_zeroed_page(GFP_KERNEL
);
458 if(!adapter
->buffer_list_addr
|| !adapter
->filter_list_addr
) {
459 ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
460 ibmveth_cleanup(adapter
);
464 adapter
->rx_queue
.queue_len
= sizeof(struct ibmveth_rx_q_entry
) * rxq_entries
;
465 adapter
->rx_queue
.queue_addr
= kmalloc(adapter
->rx_queue
.queue_len
, GFP_KERNEL
);
467 if(!adapter
->rx_queue
.queue_addr
) {
468 ibmveth_error_printk("unable to allocate rx queue pages\n");
469 ibmveth_cleanup(adapter
);
473 adapter
->buffer_list_dma
= dma_map_single(&adapter
->vdev
->dev
,
474 adapter
->buffer_list_addr
, 4096, DMA_BIDIRECTIONAL
);
475 adapter
->filter_list_dma
= dma_map_single(&adapter
->vdev
->dev
,
476 adapter
->filter_list_addr
, 4096, DMA_BIDIRECTIONAL
);
477 adapter
->rx_queue
.queue_dma
= dma_map_single(&adapter
->vdev
->dev
,
478 adapter
->rx_queue
.queue_addr
,
479 adapter
->rx_queue
.queue_len
, DMA_BIDIRECTIONAL
);
481 if((dma_mapping_error(adapter
->buffer_list_dma
) ) ||
482 (dma_mapping_error(adapter
->filter_list_dma
)) ||
483 (dma_mapping_error(adapter
->rx_queue
.queue_dma
))) {
484 ibmveth_error_printk("unable to map filter or buffer list pages\n");
485 ibmveth_cleanup(adapter
);
489 adapter
->rx_queue
.index
= 0;
490 adapter
->rx_queue
.num_slots
= rxq_entries
;
491 adapter
->rx_queue
.toggle
= 1;
493 /* call change_mtu to init the buffer pools based in initial mtu */
494 ibmveth_change_mtu(netdev
, netdev
->mtu
);
496 memcpy(&mac_address
, netdev
->dev_addr
, netdev
->addr_len
);
497 mac_address
= mac_address
>> 16;
500 rxq_desc
.fields
.valid
= 1;
501 rxq_desc
.fields
.length
= adapter
->rx_queue
.queue_len
;
502 rxq_desc
.fields
.address
= adapter
->rx_queue
.queue_dma
;
504 ibmveth_debug_printk("buffer list @ 0x%p\n", adapter
->buffer_list_addr
);
505 ibmveth_debug_printk("filter list @ 0x%p\n", adapter
->filter_list_addr
);
506 ibmveth_debug_printk("receive q @ 0x%p\n", adapter
->rx_queue
.queue_addr
);
509 lpar_rc
= h_register_logical_lan(adapter
->vdev
->unit_address
,
510 adapter
->buffer_list_dma
,
512 adapter
->filter_list_dma
,
515 if(lpar_rc
!= H_Success
) {
516 ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc
);
517 ibmveth_error_printk("buffer TCE:0x%lx filter TCE:0x%lx rxq desc:0x%lx MAC:0x%lx\n",
518 adapter
->buffer_list_dma
,
519 adapter
->filter_list_dma
,
522 ibmveth_cleanup(adapter
);
526 ibmveth_debug_printk("registering irq 0x%x\n", netdev
->irq
);
527 if((rc
= request_irq(netdev
->irq
, &ibmveth_interrupt
, 0, netdev
->name
, netdev
)) != 0) {
528 ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev
->irq
, rc
);
530 rc
= h_free_logical_lan(adapter
->vdev
->unit_address
);
531 } while (H_isLongBusy(rc
) || (rc
== H_Busy
));
533 ibmveth_cleanup(adapter
);
537 ibmveth_debug_printk("initial replenish cycle\n");
538 ibmveth_interrupt(netdev
->irq
, netdev
, NULL
);
540 netif_start_queue(netdev
);
542 ibmveth_debug_printk("open complete\n");
547 static int ibmveth_close(struct net_device
*netdev
)
549 struct ibmveth_adapter
*adapter
= netdev
->priv
;
552 ibmveth_debug_printk("close starting\n");
554 netif_stop_queue(netdev
);
556 free_irq(netdev
->irq
, netdev
);
559 lpar_rc
= h_free_logical_lan(adapter
->vdev
->unit_address
);
560 } while (H_isLongBusy(lpar_rc
) || (lpar_rc
== H_Busy
));
562 if(lpar_rc
!= H_Success
)
564 ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
568 adapter
->rx_no_buffer
= *(u64
*)(((char*)adapter
->buffer_list_addr
) + 4096 - 8);
570 ibmveth_cleanup(adapter
);
572 ibmveth_debug_printk("close complete\n");
577 static int netdev_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
) {
578 cmd
->supported
= (SUPPORTED_1000baseT_Full
| SUPPORTED_Autoneg
| SUPPORTED_FIBRE
);
579 cmd
->advertising
= (ADVERTISED_1000baseT_Full
| ADVERTISED_Autoneg
| ADVERTISED_FIBRE
);
580 cmd
->speed
= SPEED_1000
;
581 cmd
->duplex
= DUPLEX_FULL
;
582 cmd
->port
= PORT_FIBRE
;
583 cmd
->phy_address
= 0;
584 cmd
->transceiver
= XCVR_INTERNAL
;
585 cmd
->autoneg
= AUTONEG_ENABLE
;
591 static void netdev_get_drvinfo (struct net_device
*dev
, struct ethtool_drvinfo
*info
) {
592 strncpy(info
->driver
, ibmveth_driver_name
, sizeof(info
->driver
) - 1);
593 strncpy(info
->version
, ibmveth_driver_version
, sizeof(info
->version
) - 1);
596 static u32
netdev_get_link(struct net_device
*dev
) {
600 static struct ethtool_ops netdev_ethtool_ops
= {
601 .get_drvinfo
= netdev_get_drvinfo
,
602 .get_settings
= netdev_get_settings
,
603 .get_link
= netdev_get_link
,
604 .get_sg
= ethtool_op_get_sg
,
605 .get_tx_csum
= ethtool_op_get_tx_csum
,
608 static int ibmveth_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
613 #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
615 static int ibmveth_start_xmit(struct sk_buff
*skb
, struct net_device
*netdev
)
617 struct ibmveth_adapter
*adapter
= netdev
->priv
;
618 union ibmveth_buf_desc desc
[IbmVethMaxSendFrags
];
619 unsigned long lpar_rc
;
620 int nfrags
= 0, curfrag
;
621 unsigned long correlator
;
623 unsigned int retry_count
;
624 unsigned int tx_dropped
= 0;
625 unsigned int tx_bytes
= 0;
626 unsigned int tx_packets
= 0;
627 unsigned int tx_send_failed
= 0;
628 unsigned int tx_map_failed
= 0;
631 if ((skb_shinfo(skb
)->nr_frags
+ 1) > IbmVethMaxSendFrags
) {
636 memset(&desc
, 0, sizeof(desc
));
638 /* nfrags = number of frags after the initial fragment */
639 nfrags
= skb_shinfo(skb
)->nr_frags
;
642 adapter
->tx_multidesc_send
++;
644 /* map the initial fragment */
645 desc
[0].fields
.length
= nfrags
? skb
->len
- skb
->data_len
: skb
->len
;
646 desc
[0].fields
.address
= dma_map_single(&adapter
->vdev
->dev
, skb
->data
,
647 desc
[0].fields
.length
, DMA_TO_DEVICE
);
648 desc
[0].fields
.valid
= 1;
650 if(dma_mapping_error(desc
[0].fields
.address
)) {
651 ibmveth_error_printk("tx: unable to map initial fragment\n");
659 /* map fragments past the initial portion if there are any */
661 skb_frag_t
*frag
= &skb_shinfo(skb
)->frags
[curfrag
];
662 desc
[curfrag
+1].fields
.address
663 = dma_map_single(&adapter
->vdev
->dev
,
664 page_address(frag
->page
) + frag
->page_offset
,
665 frag
->size
, DMA_TO_DEVICE
);
666 desc
[curfrag
+1].fields
.length
= frag
->size
;
667 desc
[curfrag
+1].fields
.valid
= 1;
669 if(dma_mapping_error(desc
[curfrag
+1].fields
.address
)) {
670 ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag
);
673 /* Free all the mappings we just created */
674 while(curfrag
< nfrags
) {
675 dma_unmap_single(&adapter
->vdev
->dev
,
676 desc
[curfrag
+1].fields
.address
,
677 desc
[curfrag
+1].fields
.length
,
685 /* send the frame. Arbitrarily set retrycount to 1024 */
689 lpar_rc
= h_send_logical_lan(adapter
->vdev
->unit_address
,
697 } while ((lpar_rc
== H_Busy
) && (retry_count
--));
699 if(lpar_rc
!= H_Success
&& lpar_rc
!= H_Dropped
) {
701 ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc
);
702 for(i
= 0; i
< 6; i
++) {
703 ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i
,
704 desc
[i
].fields
.valid
, desc
[i
].fields
.length
, desc
[i
].fields
.address
);
710 tx_bytes
+= skb
->len
;
711 netdev
->trans_start
= jiffies
;
715 dma_unmap_single(&adapter
->vdev
->dev
,
716 desc
[nfrags
].fields
.address
,
717 desc
[nfrags
].fields
.length
, DMA_TO_DEVICE
);
718 } while(--nfrags
>= 0);
720 out
: spin_lock_irqsave(&adapter
->stats_lock
, flags
);
721 adapter
->stats
.tx_dropped
+= tx_dropped
;
722 adapter
->stats
.tx_bytes
+= tx_bytes
;
723 adapter
->stats
.tx_packets
+= tx_packets
;
724 adapter
->tx_send_failed
+= tx_send_failed
;
725 adapter
->tx_map_failed
+= tx_map_failed
;
726 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
732 static int ibmveth_poll(struct net_device
*netdev
, int *budget
)
734 struct ibmveth_adapter
*adapter
= netdev
->priv
;
735 int max_frames_to_process
= netdev
->quota
;
736 int frames_processed
= 0;
738 unsigned long lpar_rc
;
742 struct net_device
*netdev
= adapter
->netdev
;
744 if(ibmveth_rxq_pending_buffer(adapter
)) {
749 if(!ibmveth_rxq_buffer_valid(adapter
)) {
750 wmb(); /* suggested by larson1 */
751 adapter
->rx_invalid_buffer
++;
752 ibmveth_debug_printk("recycling invalid buffer\n");
753 ibmveth_rxq_recycle_buffer(adapter
);
755 int length
= ibmveth_rxq_frame_length(adapter
);
756 int offset
= ibmveth_rxq_frame_offset(adapter
);
757 skb
= ibmveth_rxq_get_buffer(adapter
);
759 ibmveth_rxq_harvest_buffer(adapter
);
761 skb_reserve(skb
, offset
);
762 skb_put(skb
, length
);
764 skb
->protocol
= eth_type_trans(skb
, netdev
);
766 netif_receive_skb(skb
); /* send it up */
768 adapter
->stats
.rx_packets
++;
769 adapter
->stats
.rx_bytes
+= length
;
771 netdev
->last_rx
= jiffies
;
776 } while(more_work
&& (frames_processed
< max_frames_to_process
));
778 ibmveth_replenish_task(adapter
);
781 /* more work to do - return that we are not done yet */
782 netdev
->quota
-= frames_processed
;
783 *budget
-= frames_processed
;
787 /* we think we are done - reenable interrupts, then check once more to make sure we are done */
788 lpar_rc
= h_vio_signal(adapter
->vdev
->unit_address
, VIO_IRQ_ENABLE
);
790 ibmveth_assert(lpar_rc
== H_Success
);
792 netif_rx_complete(netdev
);
794 if(ibmveth_rxq_pending_buffer(adapter
) && netif_rx_reschedule(netdev
, frames_processed
))
796 lpar_rc
= h_vio_signal(adapter
->vdev
->unit_address
, VIO_IRQ_DISABLE
);
797 ibmveth_assert(lpar_rc
== H_Success
);
802 netdev
->quota
-= frames_processed
;
803 *budget
-= frames_processed
;
805 /* we really are done */
809 static irqreturn_t
ibmveth_interrupt(int irq
, void *dev_instance
, struct pt_regs
*regs
)
811 struct net_device
*netdev
= dev_instance
;
812 struct ibmveth_adapter
*adapter
= netdev
->priv
;
813 unsigned long lpar_rc
;
815 if(netif_rx_schedule_prep(netdev
)) {
816 lpar_rc
= h_vio_signal(adapter
->vdev
->unit_address
, VIO_IRQ_DISABLE
);
817 ibmveth_assert(lpar_rc
== H_Success
);
818 __netif_rx_schedule(netdev
);
823 static struct net_device_stats
*ibmveth_get_stats(struct net_device
*dev
)
825 struct ibmveth_adapter
*adapter
= dev
->priv
;
826 return &adapter
->stats
;
829 static void ibmveth_set_multicast_list(struct net_device
*netdev
)
831 struct ibmveth_adapter
*adapter
= netdev
->priv
;
832 unsigned long lpar_rc
;
834 if((netdev
->flags
& IFF_PROMISC
) || (netdev
->mc_count
> adapter
->mcastFilterSize
)) {
835 lpar_rc
= h_multicast_ctrl(adapter
->vdev
->unit_address
,
836 IbmVethMcastEnableRecv
|
837 IbmVethMcastDisableFiltering
,
839 if(lpar_rc
!= H_Success
) {
840 ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc
);
843 struct dev_mc_list
*mclist
= netdev
->mc_list
;
845 /* clear the filter table & disable filtering */
846 lpar_rc
= h_multicast_ctrl(adapter
->vdev
->unit_address
,
847 IbmVethMcastEnableRecv
|
848 IbmVethMcastDisableFiltering
|
849 IbmVethMcastClearFilterTable
,
851 if(lpar_rc
!= H_Success
) {
852 ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc
);
854 /* add the addresses to the filter table */
855 for(i
= 0; i
< netdev
->mc_count
; ++i
, mclist
= mclist
->next
) {
856 // add the multicast address to the filter table
857 unsigned long mcast_addr
= 0;
858 memcpy(((char *)&mcast_addr
)+2, mclist
->dmi_addr
, 6);
859 lpar_rc
= h_multicast_ctrl(adapter
->vdev
->unit_address
,
860 IbmVethMcastAddFilter
,
862 if(lpar_rc
!= H_Success
) {
863 ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc
);
867 /* re-enable filtering */
868 lpar_rc
= h_multicast_ctrl(adapter
->vdev
->unit_address
,
869 IbmVethMcastEnableFiltering
,
871 if(lpar_rc
!= H_Success
) {
872 ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc
);
877 static int ibmveth_change_mtu(struct net_device
*dev
, int new_mtu
)
879 struct ibmveth_adapter
*adapter
= dev
->priv
;
881 int prev_smaller
= 1;
883 if ((new_mtu
< 68) ||
884 (new_mtu
> (pool_size
[IbmVethNumBufferPools
-1]) - IBMVETH_BUFF_OH
))
887 for(i
= 0; i
<IbmVethNumBufferPools
; i
++) {
889 if (new_mtu
> (pool_size
[i
] - IBMVETH_BUFF_OH
)) {
898 if (activate
&& !adapter
->rx_buff_pool
[i
].active
) {
899 struct ibmveth_buff_pool
*pool
=
900 &adapter
->rx_buff_pool
[i
];
901 if(ibmveth_alloc_buffer_pool(pool
)) {
902 ibmveth_error_printk("unable to alloc pool\n");
905 adapter
->rx_buff_pool
[i
].active
= 1;
906 } else if (!activate
&& adapter
->rx_buff_pool
[i
].active
) {
907 adapter
->rx_buff_pool
[i
].active
= 0;
908 h_free_logical_lan_buffer(adapter
->vdev
->unit_address
,
914 /* kick the interrupt handler so that the new buffer pools get
915 replenished or deallocated */
916 ibmveth_interrupt(dev
->irq
, dev
, NULL
);
922 static int __devinit
ibmveth_probe(struct vio_dev
*dev
, const struct vio_device_id
*id
)
925 struct net_device
*netdev
;
926 struct ibmveth_adapter
*adapter
= NULL
;
928 unsigned char *mac_addr_p
;
929 unsigned int *mcastFilterSize_p
;
932 ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
935 mac_addr_p
= (unsigned char *) vio_get_attribute(dev
, VETH_MAC_ADDR
, 0);
937 printk(KERN_ERR
"(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
938 "attribute\n", __FILE__
, __LINE__
);
942 mcastFilterSize_p
= (unsigned int *) vio_get_attribute(dev
, VETH_MCAST_FILTER_SIZE
, 0);
943 if(!mcastFilterSize_p
) {
944 printk(KERN_ERR
"(%s:%3.3d) ERROR: Can't find "
945 "VETH_MCAST_FILTER_SIZE attribute\n",
950 netdev
= alloc_etherdev(sizeof(struct ibmveth_adapter
));
955 SET_MODULE_OWNER(netdev
);
957 adapter
= netdev
->priv
;
958 memset(adapter
, 0, sizeof(adapter
));
959 dev
->dev
.driver_data
= netdev
;
962 adapter
->netdev
= netdev
;
963 adapter
->mcastFilterSize
= *mcastFilterSize_p
;
965 /* Some older boxes running PHYP non-natively have an OF that
966 returns a 8-byte local-mac-address field (and the first
967 2 bytes have to be ignored) while newer boxes' OF return
968 a 6-byte field. Note that IEEE 1275 specifies that
969 local-mac-address must be a 6-byte field.
970 The RPA doc specifies that the first byte must be 10b, so
971 we'll just look for it to solve this 8 vs. 6 byte field issue */
973 if ((*mac_addr_p
& 0x3) != 0x02)
976 adapter
->mac_addr
= 0;
977 memcpy(&adapter
->mac_addr
, mac_addr_p
, 6);
979 adapter
->liobn
= dev
->iommu_table
->it_index
;
981 netdev
->irq
= dev
->irq
;
982 netdev
->open
= ibmveth_open
;
983 netdev
->poll
= ibmveth_poll
;
985 netdev
->stop
= ibmveth_close
;
986 netdev
->hard_start_xmit
= ibmveth_start_xmit
;
987 netdev
->get_stats
= ibmveth_get_stats
;
988 netdev
->set_multicast_list
= ibmveth_set_multicast_list
;
989 netdev
->do_ioctl
= ibmveth_ioctl
;
990 netdev
->ethtool_ops
= &netdev_ethtool_ops
;
991 netdev
->change_mtu
= ibmveth_change_mtu
;
992 SET_NETDEV_DEV(netdev
, &dev
->dev
);
993 netdev
->features
|= NETIF_F_LLTX
;
994 spin_lock_init(&adapter
->stats_lock
);
996 memcpy(&netdev
->dev_addr
, &adapter
->mac_addr
, netdev
->addr_len
);
998 for(i
= 0; i
<IbmVethNumBufferPools
; i
++)
999 ibmveth_init_buffer_pool(&adapter
->rx_buff_pool
[i
], i
,
1000 pool_count
[i
], pool_size
[i
]);
1002 ibmveth_debug_printk("adapter @ 0x%p\n", adapter
);
1004 adapter
->buffer_list_dma
= DMA_ERROR_CODE
;
1005 adapter
->filter_list_dma
= DMA_ERROR_CODE
;
1006 adapter
->rx_queue
.queue_dma
= DMA_ERROR_CODE
;
1008 ibmveth_debug_printk("registering netdev...\n");
1010 rc
= register_netdev(netdev
);
1013 ibmveth_debug_printk("failed to register netdev rc=%d\n", rc
);
1014 free_netdev(netdev
);
1018 ibmveth_debug_printk("registered\n");
1020 ibmveth_proc_register_adapter(adapter
);
1025 static int __devexit
ibmveth_remove(struct vio_dev
*dev
)
1027 struct net_device
*netdev
= dev
->dev
.driver_data
;
1028 struct ibmveth_adapter
*adapter
= netdev
->priv
;
1030 unregister_netdev(netdev
);
1032 ibmveth_proc_unregister_adapter(adapter
);
1034 free_netdev(netdev
);
1038 #ifdef CONFIG_PROC_FS
1039 static void ibmveth_proc_register_driver(void)
1041 ibmveth_proc_dir
= proc_mkdir(IBMVETH_PROC_DIR
, NULL
);
1042 if (ibmveth_proc_dir
) {
1043 SET_MODULE_OWNER(ibmveth_proc_dir
);
1047 static void ibmveth_proc_unregister_driver(void)
1049 remove_proc_entry(IBMVETH_PROC_DIR
, NULL
);
1052 static void *ibmveth_seq_start(struct seq_file
*seq
, loff_t
*pos
)
1061 static void *ibmveth_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1067 static void ibmveth_seq_stop(struct seq_file
*seq
, void *v
)
1071 static int ibmveth_seq_show(struct seq_file
*seq
, void *v
)
1073 struct ibmveth_adapter
*adapter
= seq
->private;
1074 char *current_mac
= ((char*) &adapter
->netdev
->dev_addr
);
1075 char *firmware_mac
= ((char*) &adapter
->mac_addr
) ;
1077 seq_printf(seq
, "%s %s\n\n", ibmveth_driver_string
, ibmveth_driver_version
);
1079 seq_printf(seq
, "Unit Address: 0x%x\n", adapter
->vdev
->unit_address
);
1080 seq_printf(seq
, "LIOBN: 0x%lx\n", adapter
->liobn
);
1081 seq_printf(seq
, "Current MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1082 current_mac
[0], current_mac
[1], current_mac
[2],
1083 current_mac
[3], current_mac
[4], current_mac
[5]);
1084 seq_printf(seq
, "Firmware MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
1085 firmware_mac
[0], firmware_mac
[1], firmware_mac
[2],
1086 firmware_mac
[3], firmware_mac
[4], firmware_mac
[5]);
1088 seq_printf(seq
, "\nAdapter Statistics:\n");
1089 seq_printf(seq
, " TX: skbuffs linearized: %ld\n", adapter
->tx_linearized
);
1090 seq_printf(seq
, " multi-descriptor sends: %ld\n", adapter
->tx_multidesc_send
);
1091 seq_printf(seq
, " skb_linearize failures: %ld\n", adapter
->tx_linearize_failed
);
1092 seq_printf(seq
, " vio_map_single failres: %ld\n", adapter
->tx_map_failed
);
1093 seq_printf(seq
, " send failures: %ld\n", adapter
->tx_send_failed
);
1094 seq_printf(seq
, " RX: replenish task cycles: %ld\n", adapter
->replenish_task_cycles
);
1095 seq_printf(seq
, " alloc_skb_failures: %ld\n", adapter
->replenish_no_mem
);
1096 seq_printf(seq
, " add buffer failures: %ld\n", adapter
->replenish_add_buff_failure
);
1097 seq_printf(seq
, " invalid buffers: %ld\n", adapter
->rx_invalid_buffer
);
1098 seq_printf(seq
, " no buffers: %ld\n", adapter
->rx_no_buffer
);
1102 static struct seq_operations ibmveth_seq_ops
= {
1103 .start
= ibmveth_seq_start
,
1104 .next
= ibmveth_seq_next
,
1105 .stop
= ibmveth_seq_stop
,
1106 .show
= ibmveth_seq_show
,
1109 static int ibmveth_proc_open(struct inode
*inode
, struct file
*file
)
1111 struct seq_file
*seq
;
1112 struct proc_dir_entry
*proc
;
1115 rc
= seq_open(file
, &ibmveth_seq_ops
);
1117 /* recover the pointer buried in proc_dir_entry data */
1118 seq
= file
->private_data
;
1120 seq
->private = proc
->data
;
1125 static struct file_operations ibmveth_proc_fops
= {
1126 .owner
= THIS_MODULE
,
1127 .open
= ibmveth_proc_open
,
1129 .llseek
= seq_lseek
,
1130 .release
= seq_release
,
1133 static void ibmveth_proc_register_adapter(struct ibmveth_adapter
*adapter
)
1135 struct proc_dir_entry
*entry
;
1136 if (ibmveth_proc_dir
) {
1137 entry
= create_proc_entry(adapter
->netdev
->name
, S_IFREG
, ibmveth_proc_dir
);
1139 ibmveth_error_printk("Cannot create adapter proc entry");
1141 entry
->data
= (void *) adapter
;
1142 entry
->proc_fops
= &ibmveth_proc_fops
;
1143 SET_MODULE_OWNER(entry
);
1149 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter
*adapter
)
1151 if (ibmveth_proc_dir
) {
1152 remove_proc_entry(adapter
->netdev
->name
, ibmveth_proc_dir
);
1156 #else /* CONFIG_PROC_FS */
1157 static void ibmveth_proc_register_adapter(struct ibmveth_adapter
*adapter
)
1161 static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter
*adapter
)
1164 static void ibmveth_proc_register_driver(void)
1168 static void ibmveth_proc_unregister_driver(void)
1171 #endif /* CONFIG_PROC_FS */
1173 static struct vio_device_id ibmveth_device_table
[] __devinitdata
= {
1174 { "network", "IBM,l-lan"},
1177 MODULE_DEVICE_TABLE(vio
, ibmveth_device_table
);
1179 static struct vio_driver ibmveth_driver
= {
1180 .id_table
= ibmveth_device_table
,
1181 .probe
= ibmveth_probe
,
1182 .remove
= ibmveth_remove
,
1184 .name
= ibmveth_driver_name
,
1185 .owner
= THIS_MODULE
,
1189 static int __init
ibmveth_module_init(void)
1191 ibmveth_printk("%s: %s %s\n", ibmveth_driver_name
, ibmveth_driver_string
, ibmveth_driver_version
);
1193 ibmveth_proc_register_driver();
1195 return vio_register_driver(&ibmveth_driver
);
1198 static void __exit
ibmveth_module_exit(void)
1200 vio_unregister_driver(&ibmveth_driver
);
1201 ibmveth_proc_unregister_driver();
1204 module_init(ibmveth_module_init
);
1205 module_exit(ibmveth_module_exit
);