2 * Copyright (C) 2003 - 2006 NetXen, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
20 * The full GNU General Public License is included in this distribution
21 * in the file called LICENSE.
23 * Contact Information:
26 * 3965 Freedom Circle, Fourth floor,
27 * Santa Clara, CA 95054
30 * Main source file for NetXen NIC Driver on Linux
34 #include <linux/vmalloc.h>
35 #include <linux/highmem.h>
36 #include "netxen_nic_hw.h"
38 #include "netxen_nic.h"
39 #include "netxen_nic_phan_reg.h"
41 #include <linux/dma-mapping.h>
42 #include <linux/vmalloc.h>
45 MODULE_DESCRIPTION("NetXen Multi port (1/10) Gigabit Network Driver");
46 MODULE_LICENSE("GPL");
47 MODULE_VERSION(NETXEN_NIC_LINUX_VERSIONID
);
49 char netxen_nic_driver_name
[] = "netxen-nic";
50 static char netxen_nic_driver_string
[] = "NetXen Network Driver version "
51 NETXEN_NIC_LINUX_VERSIONID
;
53 #define NETXEN_NETDEV_WEIGHT 120
54 #define NETXEN_ADAPTER_UP_MAGIC 777
55 #define NETXEN_NIC_PEG_TUNE 0
57 #define DMA_32BIT_MASK 0x00000000ffffffffULL
58 #define DMA_35BIT_MASK 0x00000007ffffffffULL
60 /* Local functions to NetXen NIC driver */
61 static int __devinit
netxen_nic_probe(struct pci_dev
*pdev
,
62 const struct pci_device_id
*ent
);
63 static void __devexit
netxen_nic_remove(struct pci_dev
*pdev
);
64 static int netxen_nic_open(struct net_device
*netdev
);
65 static int netxen_nic_close(struct net_device
*netdev
);
66 static int netxen_nic_xmit_frame(struct sk_buff
*, struct net_device
*);
67 static void netxen_tx_timeout(struct net_device
*netdev
);
68 static void netxen_tx_timeout_task(struct work_struct
*work
);
69 static void netxen_watchdog(unsigned long);
70 static int netxen_handle_int(struct netxen_adapter
*, struct net_device
*);
71 static int netxen_nic_poll(struct net_device
*dev
, int *budget
);
72 #ifdef CONFIG_NET_POLL_CONTROLLER
73 static void netxen_nic_poll_controller(struct net_device
*netdev
);
75 static irqreturn_t
netxen_intr(int irq
, void *data
);
77 int physical_port
[] = {0, 1, 2, 3};
79 /* PCI Device ID Table */
80 static struct pci_device_id netxen_pci_tbl
[] __devinitdata
= {
81 {PCI_DEVICE(0x4040, 0x0001)},
82 {PCI_DEVICE(0x4040, 0x0002)},
83 {PCI_DEVICE(0x4040, 0x0003)},
84 {PCI_DEVICE(0x4040, 0x0004)},
85 {PCI_DEVICE(0x4040, 0x0005)},
86 {PCI_DEVICE(0x4040, 0x0024)},
87 {PCI_DEVICE(0x4040, 0x0025)},
91 MODULE_DEVICE_TABLE(pci
, netxen_pci_tbl
);
93 struct workqueue_struct
*netxen_workq
;
94 static void netxen_watchdog(unsigned long);
96 static inline void netxen_nic_update_cmd_producer(struct netxen_adapter
*adapter
,
97 uint32_t crb_producer
)
99 switch (adapter
->portnum
) {
101 writel(crb_producer
, NETXEN_CRB_NORMALIZE
102 (adapter
, CRB_CMD_PRODUCER_OFFSET
));
105 writel(crb_producer
, NETXEN_CRB_NORMALIZE
106 (adapter
, CRB_CMD_PRODUCER_OFFSET_1
));
109 writel(crb_producer
, NETXEN_CRB_NORMALIZE
110 (adapter
, CRB_CMD_PRODUCER_OFFSET_2
));
113 writel(crb_producer
, NETXEN_CRB_NORMALIZE
114 (adapter
, CRB_CMD_PRODUCER_OFFSET_3
));
117 printk(KERN_WARNING
"We tried to update "
118 "CRB_CMD_PRODUCER_OFFSET for invalid "
119 "PCI function id %d\n",
125 static inline void netxen_nic_update_cmd_consumer(struct netxen_adapter
*adapter
,
128 switch (adapter
->portnum
) {
130 writel(crb_consumer
, NETXEN_CRB_NORMALIZE
131 (adapter
, CRB_CMD_CONSUMER_OFFSET
));
134 writel(crb_consumer
, NETXEN_CRB_NORMALIZE
135 (adapter
, CRB_CMD_CONSUMER_OFFSET_1
));
138 writel(crb_consumer
, NETXEN_CRB_NORMALIZE
139 (adapter
, CRB_CMD_CONSUMER_OFFSET_2
));
142 writel(crb_consumer
, NETXEN_CRB_NORMALIZE
143 (adapter
, CRB_CMD_CONSUMER_OFFSET_3
));
146 printk(KERN_WARNING
"We tried to update "
147 "CRB_CMD_PRODUCER_OFFSET for invalid "
148 "PCI function id %d\n",
154 #define ADAPTER_LIST_SIZE 12
155 int netxen_cards_found
;
157 static void netxen_nic_disable_int(struct netxen_adapter
*adapter
)
159 uint32_t mask
= 0x7ff;
162 DPRINTK(1, INFO
, "Entered ISR Disable \n");
164 switch (adapter
->portnum
) {
166 writel(0x0, NETXEN_CRB_NORMALIZE(adapter
, CRB_SW_INT_MASK_0
));
169 writel(0x0, NETXEN_CRB_NORMALIZE(adapter
, CRB_SW_INT_MASK_1
));
172 writel(0x0, NETXEN_CRB_NORMALIZE(adapter
, CRB_SW_INT_MASK_2
));
175 writel(0x0, NETXEN_CRB_NORMALIZE(adapter
, CRB_SW_INT_MASK_3
));
179 if (adapter
->intr_scheme
!= -1 &&
180 adapter
->intr_scheme
!= INTR_SCHEME_PERPORT
)
181 writel(mask
,PCI_OFFSET_SECOND_RANGE(adapter
, ISR_INT_MASK
));
183 /* Window = 0 or 1 */
184 if (!(adapter
->flags
& NETXEN_NIC_MSI_ENABLED
)) {
187 PCI_OFFSET_SECOND_RANGE(adapter
, ISR_INT_TARGET_STATUS
));
188 mask
= readl(pci_base_offset(adapter
, ISR_INT_VECTOR
));
195 printk(KERN_NOTICE
"%s: Failed to disable interrupt completely\n",
196 netxen_nic_driver_name
);
200 DPRINTK(1, INFO
, "Done with Disable Int\n");
203 static void netxen_nic_enable_int(struct netxen_adapter
*adapter
)
207 DPRINTK(1, INFO
, "Entered ISR Enable \n");
209 if (adapter
->intr_scheme
!= -1 &&
210 adapter
->intr_scheme
!= INTR_SCHEME_PERPORT
) {
211 switch (adapter
->ahw
.board_type
) {
215 case NETXEN_NIC_XGBE
:
223 writel(mask
, PCI_OFFSET_SECOND_RANGE(adapter
, ISR_INT_MASK
));
226 switch (adapter
->portnum
) {
228 writel(0x1, NETXEN_CRB_NORMALIZE(adapter
, CRB_SW_INT_MASK_0
));
231 writel(0x1, NETXEN_CRB_NORMALIZE(adapter
, CRB_SW_INT_MASK_1
));
234 writel(0x1, NETXEN_CRB_NORMALIZE(adapter
, CRB_SW_INT_MASK_2
));
237 writel(0x1, NETXEN_CRB_NORMALIZE(adapter
, CRB_SW_INT_MASK_3
));
241 if (!(adapter
->flags
& NETXEN_NIC_MSI_ENABLED
)) {
243 if (adapter
->intr_scheme
!= -1 &&
244 adapter
->intr_scheme
!= INTR_SCHEME_PERPORT
) {
245 writel(0X0, NETXEN_CRB_NORMALIZE(adapter
, CRB_INT_VECTOR
));
248 PCI_OFFSET_SECOND_RANGE(adapter
, ISR_INT_TARGET_MASK
));
251 DPRINTK(1, INFO
, "Done with enable Int\n");
257 * The Linux system will invoke this after identifying the vendor ID and
258 * device Id in the pci_tbl supported by this module.
260 * A quad port card has one operational PCI config space, (function 0),
261 * which is used to access all four ports.
263 * This routine will initialize the adapter, and setup the global parameters
264 * along with the port's specific structure.
267 netxen_nic_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
269 struct net_device
*netdev
= NULL
;
270 struct netxen_adapter
*adapter
= NULL
;
271 void __iomem
*mem_ptr0
= NULL
;
272 void __iomem
*mem_ptr1
= NULL
;
273 void __iomem
*mem_ptr2
= NULL
;
274 unsigned long first_page_group_end
;
275 unsigned long first_page_group_start
;
278 u8 __iomem
*db_ptr
= NULL
;
279 unsigned long mem_base
, mem_len
, db_base
, db_len
;
280 int pci_using_dac
, i
= 0, err
;
282 struct netxen_recv_context
*recv_ctx
= NULL
;
283 struct netxen_rcv_desc_ctx
*rcv_desc
= NULL
;
284 struct netxen_cmd_buffer
*cmd_buf_arr
= NULL
;
285 u64 mac_addr
[FLASH_NUM_PORTS
+ 1];
288 int pci_func_id
= PCI_FUNC(pdev
->devfn
);
290 printk(KERN_INFO
"%s \n", netxen_nic_driver_string
);
292 if (pdev
->class != 0x020000) {
293 printk(KERN_ERR
"NetXen function %d, class %x will not"
294 "be enabled.\n",pci_func_id
, pdev
->class);
297 if ((err
= pci_enable_device(pdev
)))
299 if (!(pci_resource_flags(pdev
, 0) & IORESOURCE_MEM
)) {
301 goto err_out_disable_pdev
;
304 if ((err
= pci_request_regions(pdev
, netxen_nic_driver_name
)))
305 goto err_out_disable_pdev
;
307 pci_set_master(pdev
);
308 if (pdev
->revision
== NX_P2_C1
&&
309 (pci_set_dma_mask(pdev
, DMA_35BIT_MASK
) == 0) &&
310 (pci_set_consistent_dma_mask(pdev
, DMA_35BIT_MASK
) == 0)) {
313 if ((err
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
)) ||
314 (err
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
)))
315 goto err_out_free_res
;
321 netdev
= alloc_etherdev(sizeof(struct netxen_adapter
));
323 printk(KERN_ERR
"%s: Failed to allocate memory for the "
324 "device block.Check system memory resource"
325 " usage.\n", netxen_nic_driver_name
);
326 goto err_out_free_res
;
329 SET_MODULE_OWNER(netdev
);
330 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
332 adapter
= netdev
->priv
;
333 memset(adapter
, 0 , sizeof(struct netxen_adapter
));
335 adapter
->ahw
.pdev
= pdev
;
336 adapter
->ahw
.pci_func
= pci_func_id
;
337 spin_lock_init(&adapter
->tx_lock
);
338 spin_lock_init(&adapter
->lock
);
340 /* remap phys address */
341 mem_base
= pci_resource_start(pdev
, 0); /* 0 is for BAR 0 */
342 mem_len
= pci_resource_len(pdev
, 0);
344 /* 128 Meg of memory */
345 if (mem_len
== NETXEN_PCI_128MB_SIZE
) {
346 mem_ptr0
= ioremap(mem_base
, FIRST_PAGE_GROUP_SIZE
);
347 mem_ptr1
= ioremap(mem_base
+ SECOND_PAGE_GROUP_START
,
348 SECOND_PAGE_GROUP_SIZE
);
349 mem_ptr2
= ioremap(mem_base
+ THIRD_PAGE_GROUP_START
,
350 THIRD_PAGE_GROUP_SIZE
);
351 first_page_group_start
= FIRST_PAGE_GROUP_START
;
352 first_page_group_end
= FIRST_PAGE_GROUP_END
;
353 } else if (mem_len
== NETXEN_PCI_32MB_SIZE
) {
354 mem_ptr1
= ioremap(mem_base
, SECOND_PAGE_GROUP_SIZE
);
355 mem_ptr2
= ioremap(mem_base
+ THIRD_PAGE_GROUP_START
-
356 SECOND_PAGE_GROUP_START
, THIRD_PAGE_GROUP_SIZE
);
357 first_page_group_start
= 0;
358 first_page_group_end
= 0;
361 goto err_out_free_netdev
;
364 if (((mem_ptr0
== 0UL) && (mem_len
== NETXEN_PCI_128MB_SIZE
)) ||
365 (mem_ptr1
== 0UL) || (mem_ptr2
== 0UL)) {
367 "Cannot remap adapter memory aborting.:"
368 "0 -> %p, 1 -> %p, 2 -> %p\n",
369 mem_ptr0
, mem_ptr1
, mem_ptr2
);
372 goto err_out_iounmap
;
374 db_base
= pci_resource_start(pdev
, 4); /* doorbell is on bar 4 */
375 db_len
= pci_resource_len(pdev
, 4);
378 printk(KERN_ERR
"%s: doorbell is disabled\n",
379 netxen_nic_driver_name
);
381 goto err_out_iounmap
;
383 DPRINTK(INFO
, "doorbell ioremap from %lx a size of %lx\n", db_base
,
386 db_ptr
= ioremap(db_base
, NETXEN_DB_MAPSIZE_BYTES
);
388 printk(KERN_ERR
"%s: Failed to allocate doorbell map.",
389 netxen_nic_driver_name
);
391 goto err_out_iounmap
;
393 DPRINTK(INFO
, "doorbell ioremaped at %p\n", db_ptr
);
395 adapter
->ahw
.pci_base0
= mem_ptr0
;
396 adapter
->ahw
.first_page_group_start
= first_page_group_start
;
397 adapter
->ahw
.first_page_group_end
= first_page_group_end
;
398 adapter
->ahw
.pci_base1
= mem_ptr1
;
399 adapter
->ahw
.pci_base2
= mem_ptr2
;
400 adapter
->ahw
.db_base
= db_ptr
;
401 adapter
->ahw
.db_len
= db_len
;
403 adapter
->netdev
= netdev
;
404 adapter
->pdev
= pdev
;
406 /* this will be read from FW later */
407 adapter
->intr_scheme
= -1;
409 /* This will be reset for mezz cards */
410 adapter
->portnum
= pci_func_id
;
411 adapter
->status
&= ~NETXEN_NETDEV_STATUS
;
413 netdev
->open
= netxen_nic_open
;
414 netdev
->stop
= netxen_nic_close
;
415 netdev
->hard_start_xmit
= netxen_nic_xmit_frame
;
416 netdev
->get_stats
= netxen_nic_get_stats
;
417 netdev
->set_multicast_list
= netxen_nic_set_multi
;
418 netdev
->set_mac_address
= netxen_nic_set_mac
;
419 netdev
->change_mtu
= netxen_nic_change_mtu
;
420 netdev
->tx_timeout
= netxen_tx_timeout
;
421 netdev
->watchdog_timeo
= HZ
;
423 netxen_nic_change_mtu(netdev
, netdev
->mtu
);
425 SET_ETHTOOL_OPS(netdev
, &netxen_nic_ethtool_ops
);
426 netdev
->poll
= netxen_nic_poll
;
427 netdev
->weight
= NETXEN_NETDEV_WEIGHT
;
428 #ifdef CONFIG_NET_POLL_CONTROLLER
429 netdev
->poll_controller
= netxen_nic_poll_controller
;
431 /* ScatterGather support */
432 netdev
->features
= NETIF_F_SG
;
433 netdev
->features
|= NETIF_F_IP_CSUM
;
434 netdev
->features
|= NETIF_F_TSO
;
437 netdev
->features
|= NETIF_F_HIGHDMA
;
439 if (pci_enable_msi(pdev
))
440 adapter
->flags
&= ~NETXEN_NIC_MSI_ENABLED
;
442 adapter
->flags
|= NETXEN_NIC_MSI_ENABLED
;
444 netdev
->irq
= pdev
->irq
;
445 INIT_WORK(&adapter
->tx_timeout_task
, netxen_tx_timeout_task
);
448 * Set the CRB window to invalid. If any register in window 0 is
449 * accessed it should set the window to 0 and then reset it to 1.
451 adapter
->curr_window
= 255;
453 /* initialize the adapter */
454 netxen_initialize_adapter_hw(adapter
);
457 * Adapter in our case is quad port so initialize it before
458 * initializing the ports
461 netxen_initialize_adapter_ops(adapter
);
463 adapter
->max_tx_desc_count
= MAX_CMD_DESCRIPTORS_HOST
;
464 if ((adapter
->ahw
.boardcfg
.board_type
== NETXEN_BRDTYPE_P2_SB35_4G
) ||
465 (adapter
->ahw
.boardcfg
.board_type
==
466 NETXEN_BRDTYPE_P2_SB31_2G
))
467 adapter
->max_rx_desc_count
= MAX_RCV_DESCRIPTORS_1G
;
469 adapter
->max_rx_desc_count
= MAX_RCV_DESCRIPTORS
;
470 adapter
->max_jumbo_rx_desc_count
= MAX_JUMBO_RCV_DESCRIPTORS
;
471 adapter
->max_lro_rx_desc_count
= MAX_LRO_RCV_DESCRIPTORS
;
473 cmd_buf_arr
= (struct netxen_cmd_buffer
*)vmalloc(TX_RINGSIZE
);
474 if (cmd_buf_arr
== NULL
) {
476 "%s: Could not allocate cmd_buf_arr memory:%d\n",
477 netxen_nic_driver_name
, (int)TX_RINGSIZE
);
479 goto err_out_free_adapter
;
481 memset(cmd_buf_arr
, 0, TX_RINGSIZE
);
482 adapter
->cmd_buf_arr
= cmd_buf_arr
;
484 for (i
= 0; i
< MAX_RCV_CTX
; ++i
) {
485 recv_ctx
= &adapter
->recv_ctx
[i
];
486 for (ring
= 0; ring
< NUM_RCV_DESC_RINGS
; ring
++) {
487 rcv_desc
= &recv_ctx
->rcv_desc
[ring
];
488 switch (RCV_DESC_TYPE(ring
)) {
489 case RCV_DESC_NORMAL
:
490 rcv_desc
->max_rx_desc_count
=
491 adapter
->max_rx_desc_count
;
492 rcv_desc
->flags
= RCV_DESC_NORMAL
;
493 rcv_desc
->dma_size
= RX_DMA_MAP_LEN
;
494 rcv_desc
->skb_size
= MAX_RX_BUFFER_LENGTH
;
498 rcv_desc
->max_rx_desc_count
=
499 adapter
->max_jumbo_rx_desc_count
;
500 rcv_desc
->flags
= RCV_DESC_JUMBO
;
501 rcv_desc
->dma_size
= RX_JUMBO_DMA_MAP_LEN
;
502 rcv_desc
->skb_size
= MAX_RX_JUMBO_BUFFER_LENGTH
;
506 rcv_desc
->max_rx_desc_count
=
507 adapter
->max_lro_rx_desc_count
;
508 rcv_desc
->flags
= RCV_DESC_LRO
;
509 rcv_desc
->dma_size
= RX_LRO_DMA_MAP_LEN
;
510 rcv_desc
->skb_size
= MAX_RX_LRO_BUFFER_LENGTH
;
514 rcv_desc
->rx_buf_arr
= (struct netxen_rx_buffer
*)
515 vmalloc(RCV_BUFFSIZE
);
517 if (rcv_desc
->rx_buf_arr
== NULL
) {
518 printk(KERN_ERR
"%s: Could not allocate"
519 "rcv_desc->rx_buf_arr memory:%d\n",
520 netxen_nic_driver_name
,
523 goto err_out_free_rx_buffer
;
525 memset(rcv_desc
->rx_buf_arr
, 0, RCV_BUFFSIZE
);
530 netxen_initialize_adapter_sw(adapter
); /* initialize the buffers in adapter */
532 /* Mezz cards have PCI function 0,2,3 enabled */
533 if ((adapter
->ahw
.boardcfg
.board_type
== NETXEN_BRDTYPE_P2_SB31_10G_IMEZ
)
534 && (pci_func_id
>= 2))
535 adapter
->portnum
= pci_func_id
- 2;
538 if(adapter
->portnum
== 0) {
539 netxen_pinit_from_rom(adapter
, 0);
541 netxen_load_firmware(adapter
);
545 init_timer(&adapter
->watchdog_timer
);
546 adapter
->ahw
.xg_linkup
= 0;
547 adapter
->watchdog_timer
.function
= &netxen_watchdog
;
548 adapter
->watchdog_timer
.data
= (unsigned long)adapter
;
549 INIT_WORK(&adapter
->watchdog_task
, netxen_watchdog_task
);
550 adapter
->ahw
.pdev
= pdev
;
551 adapter
->proc_cmd_buf_counter
= 0;
552 adapter
->ahw
.revision_id
= pdev
->revision
;
554 /* make sure Window == 1 */
555 netxen_nic_pci_change_crbwindow(adapter
, 1);
557 netxen_nic_update_cmd_producer(adapter
, 0);
558 netxen_nic_update_cmd_consumer(adapter
, 0);
559 writel(0, NETXEN_CRB_NORMALIZE(adapter
, CRB_HOST_CMD_ADDR_LO
));
561 if (netxen_is_flash_supported(adapter
) == 0 &&
562 netxen_get_flash_mac_addr(adapter
, mac_addr
) == 0)
568 unsigned char *p
= (unsigned char *)&mac_addr
[adapter
->portnum
];
569 netdev
->dev_addr
[0] = *(p
+ 5);
570 netdev
->dev_addr
[1] = *(p
+ 4);
571 netdev
->dev_addr
[2] = *(p
+ 3);
572 netdev
->dev_addr
[3] = *(p
+ 2);
573 netdev
->dev_addr
[4] = *(p
+ 1);
574 netdev
->dev_addr
[5] = *(p
+ 0);
576 memcpy(netdev
->perm_addr
, netdev
->dev_addr
,
578 if (!is_valid_ether_addr(netdev
->perm_addr
)) {
579 printk(KERN_ERR
"%s: Bad MAC address "
580 "%02x:%02x:%02x:%02x:%02x:%02x.\n",
581 netxen_nic_driver_name
,
587 netdev
->dev_addr
[5]);
589 if (adapter
->macaddr_set
)
590 adapter
->macaddr_set(adapter
,
595 if (adapter
->portnum
== 0) {
596 err
= netxen_initialize_adapter_offload(adapter
);
598 goto err_out_free_rx_buffer
;
599 val
= readl(NETXEN_CRB_NORMALIZE(adapter
,
600 NETXEN_CAM_RAM(0x1fc)));
601 if (val
== 0x55555555) {
602 /* This is the first boot after power up */
603 netxen_nic_read_w0(adapter
, NETXEN_PCIE_REG(0x4), &val
);
606 netxen_nic_write_w0(adapter
, NETXEN_PCIE_REG(0x4), val
);
607 netxen_nic_read_w0(adapter
, NETXEN_PCIE_REG(0x4), &val
);
609 printk(KERN_ERR
"%s: failed to set MSI bit in PCI-e reg\n",
610 netxen_nic_driver_name
);
612 val
= readl(NETXEN_CRB_NORMALIZE(adapter
,
613 NETXEN_ROMUSB_GLB_SW_RESET
));
614 printk(KERN_INFO
"NetXen: read 0x%08x for reset reg.\n",val
);
615 if (val
!= 0x80000f) {
616 /* clear the register for future unloads/loads */
617 writel(0, NETXEN_CRB_NORMALIZE(adapter
,
618 NETXEN_CAM_RAM(0x1fc)));
619 printk(KERN_ERR
"ERROR in NetXen HW init sequence.\n");
621 goto err_out_free_dev
;
625 /* clear the register for future unloads/loads */
626 writel(0, NETXEN_CRB_NORMALIZE(adapter
, NETXEN_CAM_RAM(0x1fc)));
627 printk(KERN_INFO
"State: 0x%0x\n",
628 readl(NETXEN_CRB_NORMALIZE(adapter
, CRB_CMDPEG_STATE
)));
631 * Tell the hardware our version number.
633 i
= (_NETXEN_NIC_LINUX_MAJOR
<< 16)
634 | ((_NETXEN_NIC_LINUX_MINOR
<< 8))
635 | (_NETXEN_NIC_LINUX_SUBVERSION
);
636 writel(i
, NETXEN_CRB_NORMALIZE(adapter
, CRB_DRIVER_VERSION
));
638 /* Unlock the HW, prompting the boot sequence */
640 NETXEN_CRB_NORMALIZE(adapter
,
641 NETXEN_ROMUSB_GLB_PEGTUNE_DONE
));
642 /* Handshake with the card before we register the devices. */
643 netxen_phantom_init(adapter
, NETXEN_NIC_PEG_TUNE
);
647 * See if the firmware gave us a virtual-physical port mapping.
649 i
= readl(NETXEN_CRB_NORMALIZE(adapter
, CRB_V2P(adapter
->portnum
)));
651 physical_port
[adapter
->portnum
] = i
;
653 netif_carrier_off(netdev
);
654 netif_stop_queue(netdev
);
656 if ((err
= register_netdev(netdev
))) {
657 printk(KERN_ERR
"%s: register_netdev failed port #%d"
658 " aborting\n", netxen_nic_driver_name
,
661 goto err_out_free_dev
;
664 pci_set_drvdata(pdev
, adapter
);
666 switch (adapter
->ahw
.board_type
) {
668 printk(KERN_INFO
"%s: QUAD GbE board initialized\n",
669 netxen_nic_driver_name
);
672 case NETXEN_NIC_XGBE
:
673 printk(KERN_INFO
"%s: XGbE board initialized\n",
674 netxen_nic_driver_name
);
678 adapter
->driver_mismatch
= 0;
683 if (adapter
->portnum
== 0)
684 netxen_free_adapter_offload(adapter
);
686 err_out_free_rx_buffer
:
687 for (i
= 0; i
< MAX_RCV_CTX
; ++i
) {
688 recv_ctx
= &adapter
->recv_ctx
[i
];
689 for (ring
= 0; ring
< NUM_RCV_DESC_RINGS
; ring
++) {
690 rcv_desc
= &recv_ctx
->rcv_desc
[ring
];
691 if (rcv_desc
->rx_buf_arr
!= NULL
) {
692 vfree(rcv_desc
->rx_buf_arr
);
693 rcv_desc
->rx_buf_arr
= NULL
;
699 err_out_free_adapter
:
700 if (adapter
->flags
& NETXEN_NIC_MSI_ENABLED
)
701 pci_disable_msi(pdev
);
703 pci_set_drvdata(pdev
, NULL
);
720 pci_release_regions(pdev
);
722 err_out_disable_pdev
:
723 pci_disable_device(pdev
);
727 static void __devexit
netxen_nic_remove(struct pci_dev
*pdev
)
729 struct netxen_adapter
*adapter
;
730 struct net_device
*netdev
;
731 struct netxen_rx_buffer
*buffer
;
732 struct netxen_recv_context
*recv_ctx
;
733 struct netxen_rcv_desc_ctx
*rcv_desc
;
735 static int init_firmware_done
= 0;
737 adapter
= pci_get_drvdata(pdev
);
741 netdev
= adapter
->netdev
;
743 unregister_netdev(netdev
);
745 if (adapter
->stop_port
)
746 adapter
->stop_port(adapter
);
748 netxen_nic_disable_int(adapter
);
751 free_irq(adapter
->irq
, adapter
);
753 if (adapter
->is_up
== NETXEN_ADAPTER_UP_MAGIC
) {
754 init_firmware_done
++;
755 netxen_free_hw_resources(adapter
);
758 for (ctxid
= 0; ctxid
< MAX_RCV_CTX
; ++ctxid
) {
759 recv_ctx
= &adapter
->recv_ctx
[ctxid
];
760 for (ring
= 0; ring
< NUM_RCV_DESC_RINGS
; ring
++) {
761 rcv_desc
= &recv_ctx
->rcv_desc
[ring
];
762 for (i
= 0; i
< rcv_desc
->max_rx_desc_count
; ++i
) {
763 buffer
= &(rcv_desc
->rx_buf_arr
[i
]);
764 if (buffer
->state
== NETXEN_BUFFER_FREE
)
766 pci_unmap_single(pdev
, buffer
->dma
,
769 if (buffer
->skb
!= NULL
)
770 dev_kfree_skb_any(buffer
->skb
);
772 vfree(rcv_desc
->rx_buf_arr
);
776 if (adapter
->flags
& NETXEN_NIC_MSI_ENABLED
)
777 pci_disable_msi(pdev
);
779 vfree(adapter
->cmd_buf_arr
);
781 pci_disable_device(pdev
);
783 if (adapter
->portnum
== 0) {
784 if (init_firmware_done
) {
785 dma_watchdog_shutdown_request(adapter
);
788 while ((dma_watchdog_shutdown_poll_result(adapter
) != 1) && i
) {
789 printk(KERN_INFO
"dma_watchdog_shutdown_poll still in progress\n");
795 printk(KERN_ERR
"dma_watchdog_shutdown_request failed\n");
799 /* clear the register for future unloads/loads */
800 writel(0, NETXEN_CRB_NORMALIZE(adapter
, NETXEN_CAM_RAM(0x1fc)));
801 printk(KERN_INFO
"State: 0x%0x\n",
802 readl(NETXEN_CRB_NORMALIZE(adapter
, CRB_CMDPEG_STATE
)));
804 /* leave the hw in the same state as reboot */
805 writel(0, NETXEN_CRB_NORMALIZE(adapter
, CRB_CMDPEG_STATE
));
806 if (netxen_pinit_from_rom(adapter
, 0))
809 if (netxen_load_firmware(adapter
))
811 netxen_phantom_init(adapter
, NETXEN_NIC_PEG_TUNE
);
814 /* clear the register for future unloads/loads */
815 writel(0, NETXEN_CRB_NORMALIZE(adapter
, NETXEN_CAM_RAM(0x1fc)));
816 printk(KERN_INFO
"State: 0x%0x\n",
817 readl(NETXEN_CRB_NORMALIZE(adapter
, CRB_CMDPEG_STATE
)));
819 dma_watchdog_shutdown_request(adapter
);
822 while ((dma_watchdog_shutdown_poll_result(adapter
) != 1) && i
) {
823 printk(KERN_INFO
"dma_watchdog_shutdown_poll still in progress\n");
829 netxen_free_adapter_offload(adapter
);
831 printk(KERN_ERR
"failed to dma shutdown\n");
837 iounmap(adapter
->ahw
.db_base
);
838 iounmap(adapter
->ahw
.pci_base0
);
839 iounmap(adapter
->ahw
.pci_base1
);
840 iounmap(adapter
->ahw
.pci_base2
);
842 pci_release_regions(pdev
);
843 pci_set_drvdata(pdev
, NULL
);
849 * Called when a network interface is made active
850 * @returns 0 on success, negative value on failure
852 static int netxen_nic_open(struct net_device
*netdev
)
854 struct netxen_adapter
*adapter
= (struct netxen_adapter
*)netdev
->priv
;
858 if (adapter
->is_up
!= NETXEN_ADAPTER_UP_MAGIC
) {
859 err
= netxen_init_firmware(adapter
);
861 printk(KERN_ERR
"Failed to init firmware\n");
864 netxen_nic_flash_print(adapter
);
866 /* setup all the resources for the Phantom... */
867 /* this include the descriptors for rcv, tx, and status */
868 netxen_nic_clear_stats(adapter
);
869 err
= netxen_nic_hw_resources(adapter
);
871 printk(KERN_ERR
"Error in setting hw resources:%d\n",
875 for (ctx
= 0; ctx
< MAX_RCV_CTX
; ++ctx
) {
876 for (ring
= 0; ring
< NUM_RCV_DESC_RINGS
; ring
++)
877 netxen_post_rx_buffers(adapter
, ctx
, ring
);
879 adapter
->irq
= adapter
->ahw
.pdev
->irq
;
880 err
= request_irq(adapter
->ahw
.pdev
->irq
, netxen_intr
,
881 IRQF_SHARED
|IRQF_SAMPLE_RANDOM
, netdev
->name
,
884 printk(KERN_ERR
"request_irq failed with: %d\n", err
);
885 netxen_free_hw_resources(adapter
);
889 adapter
->is_up
= NETXEN_ADAPTER_UP_MAGIC
;
891 if (!adapter
->driver_mismatch
)
892 mod_timer(&adapter
->watchdog_timer
, jiffies
);
894 netxen_nic_enable_int(adapter
);
896 /* Done here again so that even if phantom sw overwrote it,
898 if (adapter
->macaddr_set
)
899 adapter
->macaddr_set(adapter
, netdev
->dev_addr
);
900 if (adapter
->init_port
901 && adapter
->init_port(adapter
, adapter
->portnum
) != 0) {
902 del_timer_sync(&adapter
->watchdog_timer
);
903 printk(KERN_ERR
"%s: Failed to initialize port %d\n",
904 netxen_nic_driver_name
, adapter
->portnum
);
908 netxen_nic_set_link_parameters(adapter
);
910 netxen_nic_set_multi(netdev
);
911 if (adapter
->set_mtu
)
912 adapter
->set_mtu(adapter
, netdev
->mtu
);
914 if (!adapter
->driver_mismatch
)
915 netif_start_queue(netdev
);
921 * netxen_nic_close - Disables a network interface entry point
923 static int netxen_nic_close(struct net_device
*netdev
)
925 struct netxen_adapter
*adapter
= netdev_priv(netdev
);
927 struct netxen_cmd_buffer
*cmd_buff
;
928 struct netxen_skb_frag
*buffrag
;
930 netif_carrier_off(netdev
);
931 netif_stop_queue(netdev
);
933 cmd_buff
= adapter
->cmd_buf_arr
;
934 for (i
= 0; i
< adapter
->max_tx_desc_count
; i
++) {
935 buffrag
= cmd_buff
->frag_array
;
937 pci_unmap_single(adapter
->pdev
, buffrag
->dma
,
938 buffrag
->length
, PCI_DMA_TODEVICE
);
941 for (j
= 0; j
< cmd_buff
->frag_count
; j
++) {
944 pci_unmap_page(adapter
->pdev
, buffrag
->dma
,
950 /* Free the skb we received in netxen_nic_xmit_frame */
952 dev_kfree_skb_any(cmd_buff
->skb
);
953 cmd_buff
->skb
= NULL
;
957 if (adapter
->is_up
== NETXEN_ADAPTER_UP_MAGIC
) {
958 FLUSH_SCHEDULED_WORK();
959 del_timer_sync(&adapter
->watchdog_timer
);
965 static int netxen_nic_xmit_frame(struct sk_buff
*skb
, struct net_device
*netdev
)
967 struct netxen_adapter
*adapter
= netdev_priv(netdev
);
968 struct netxen_hardware_context
*hw
= &adapter
->ahw
;
969 unsigned int first_seg_len
= skb
->len
- skb
->data_len
;
970 struct netxen_skb_frag
*buffrag
;
974 u32 saved_producer
= 0;
975 struct cmd_desc_type0
*hwdesc
;
977 struct netxen_cmd_buffer
*pbuf
= NULL
;
978 static int dropped_packet
= 0;
980 u32 local_producer
= 0;
981 u32 max_tx_desc_count
= 0;
982 u32 last_cmd_consumer
= 0;
985 adapter
->stats
.xmitcalled
++;
986 frag_count
= skb_shinfo(skb
)->nr_frags
+ 1;
988 if (unlikely(skb
->len
<= 0)) {
989 dev_kfree_skb_any(skb
);
990 adapter
->stats
.badskblen
++;
994 if (frag_count
> MAX_BUFFERS_PER_CMD
) {
995 printk("%s: %s netxen_nic_xmit_frame: frag_count (%d)"
996 "too large, can handle only %d frags\n",
997 netxen_nic_driver_name
, netdev
->name
,
998 frag_count
, MAX_BUFFERS_PER_CMD
);
999 adapter
->stats
.txdropped
++;
1000 if ((++dropped_packet
& 0xff) == 0xff)
1001 printk("%s: %s droppped packets = %d\n",
1002 netxen_nic_driver_name
, netdev
->name
,
1005 return NETDEV_TX_OK
;
1009 * Everything is set up. Now, we just need to transmit it out.
1010 * Note that we have to copy the contents of buffer over to
1011 * right place. Later on, this can be optimized out by de-coupling the
1012 * producer index from the buffer index.
1014 retry_getting_window
:
1015 spin_lock_bh(&adapter
->tx_lock
);
1016 if (adapter
->total_threads
>= MAX_XMIT_PRODUCERS
) {
1017 spin_unlock_bh(&adapter
->tx_lock
);
1024 for (i
= 0; i
< 20; i
++)
1025 cpu_relax(); /*This a nop instr on i386 */
1027 goto retry_getting_window
;
1029 local_producer
= adapter
->cmd_producer
;
1030 /* There 4 fragments per descriptor */
1031 no_of_desc
= (frag_count
+ 3) >> 2;
1032 if (netdev
->features
& NETIF_F_TSO
) {
1033 if (skb_shinfo(skb
)->gso_size
> 0) {
1036 if ((ip_hdrlen(skb
) + tcp_hdrlen(skb
) +
1037 sizeof(struct ethhdr
)) >
1038 (sizeof(struct cmd_desc_type0
) - 2)) {
1043 k
= adapter
->cmd_producer
;
1044 max_tx_desc_count
= adapter
->max_tx_desc_count
;
1045 last_cmd_consumer
= adapter
->last_cmd_consumer
;
1046 if ((k
+ no_of_desc
) >=
1047 ((last_cmd_consumer
<= k
) ? last_cmd_consumer
+ max_tx_desc_count
:
1048 last_cmd_consumer
)) {
1049 netif_stop_queue(netdev
);
1050 adapter
->flags
|= NETXEN_NETDEV_STATUS
;
1051 spin_unlock_bh(&adapter
->tx_lock
);
1052 return NETDEV_TX_BUSY
;
1054 k
= get_index_range(k
, max_tx_desc_count
, no_of_desc
);
1055 adapter
->cmd_producer
= k
;
1056 adapter
->total_threads
++;
1057 adapter
->num_threads
++;
1059 spin_unlock_bh(&adapter
->tx_lock
);
1060 /* Copy the descriptors into the hardware */
1061 producer
= local_producer
;
1062 saved_producer
= producer
;
1063 hwdesc
= &hw
->cmd_desc_head
[producer
];
1064 memset(hwdesc
, 0, sizeof(struct cmd_desc_type0
));
1065 /* Take skb->data itself */
1066 pbuf
= &adapter
->cmd_buf_arr
[producer
];
1067 if ((netdev
->features
& NETIF_F_TSO
) && skb_shinfo(skb
)->gso_size
> 0) {
1068 pbuf
->mss
= skb_shinfo(skb
)->gso_size
;
1069 hwdesc
->mss
= cpu_to_le16(skb_shinfo(skb
)->gso_size
);
1074 pbuf
->total_length
= skb
->len
;
1076 pbuf
->cmd
= TX_ETHER_PKT
;
1077 pbuf
->frag_count
= frag_count
;
1078 pbuf
->port
= adapter
->portnum
;
1079 buffrag
= &pbuf
->frag_array
[0];
1080 buffrag
->dma
= pci_map_single(adapter
->pdev
, skb
->data
, first_seg_len
,
1082 buffrag
->length
= first_seg_len
;
1083 netxen_set_cmd_desc_totallength(hwdesc
, skb
->len
);
1084 netxen_set_cmd_desc_num_of_buff(hwdesc
, frag_count
);
1085 netxen_set_cmd_desc_opcode(hwdesc
, TX_ETHER_PKT
);
1087 netxen_set_cmd_desc_port(hwdesc
, adapter
->portnum
);
1088 netxen_set_cmd_desc_ctxid(hwdesc
, adapter
->portnum
);
1089 hwdesc
->buffer1_length
= cpu_to_le16(first_seg_len
);
1090 hwdesc
->addr_buffer1
= cpu_to_le64(buffrag
->dma
);
1092 for (i
= 1, k
= 1; i
< frag_count
; i
++, k
++) {
1093 struct skb_frag_struct
*frag
;
1095 unsigned long offset
;
1096 dma_addr_t temp_dma
;
1098 /* move to next desc. if there is a need */
1099 if ((i
& 0x3) == 0) {
1101 producer
= get_next_index(producer
,
1102 adapter
->max_tx_desc_count
);
1103 hwdesc
= &hw
->cmd_desc_head
[producer
];
1104 memset(hwdesc
, 0, sizeof(struct cmd_desc_type0
));
1106 frag
= &skb_shinfo(skb
)->frags
[i
- 1];
1108 offset
= frag
->page_offset
;
1111 temp_dma
= pci_map_page(adapter
->pdev
, frag
->page
, offset
,
1112 len
, PCI_DMA_TODEVICE
);
1115 buffrag
->dma
= temp_dma
;
1116 buffrag
->length
= temp_len
;
1118 DPRINTK(INFO
, "for loop. i=%d k=%d\n", i
, k
);
1121 hwdesc
->buffer1_length
= cpu_to_le16(temp_len
);
1122 hwdesc
->addr_buffer1
= cpu_to_le64(temp_dma
);
1125 hwdesc
->buffer2_length
= cpu_to_le16(temp_len
);
1126 hwdesc
->addr_buffer2
= cpu_to_le64(temp_dma
);
1129 hwdesc
->buffer3_length
= cpu_to_le16(temp_len
);
1130 hwdesc
->addr_buffer3
= cpu_to_le64(temp_dma
);
1133 hwdesc
->buffer4_length
= cpu_to_le16(temp_len
);
1134 hwdesc
->addr_buffer4
= cpu_to_le64(temp_dma
);
1139 producer
= get_next_index(producer
, adapter
->max_tx_desc_count
);
1141 /* might change opcode to TX_TCP_LSO */
1142 netxen_tso_check(adapter
, &hw
->cmd_desc_head
[saved_producer
], skb
);
1144 /* For LSO, we need to copy the MAC/IP/TCP headers into
1145 * the descriptor ring
1147 if (netxen_get_cmd_desc_opcode(&hw
->cmd_desc_head
[saved_producer
])
1149 int hdr_len
, first_hdr_len
, more_hdr
;
1150 hdr_len
= hw
->cmd_desc_head
[saved_producer
].total_hdr_length
;
1151 if (hdr_len
> (sizeof(struct cmd_desc_type0
) - 2)) {
1152 first_hdr_len
= sizeof(struct cmd_desc_type0
) - 2;
1155 first_hdr_len
= hdr_len
;
1158 /* copy the MAC/IP/TCP headers to the cmd descriptor list */
1159 hwdesc
= &hw
->cmd_desc_head
[producer
];
1161 /* copy the first 64 bytes */
1162 memcpy(((void *)hwdesc
) + 2,
1163 (void *)(skb
->data
), first_hdr_len
);
1164 producer
= get_next_index(producer
, max_tx_desc_count
);
1167 hwdesc
= &hw
->cmd_desc_head
[producer
];
1168 /* copy the next 64 bytes - should be enough except
1169 * for pathological case
1171 skb_copy_from_linear_data_offset(skb
, first_hdr_len
,
1175 producer
= get_next_index(producer
, max_tx_desc_count
);
1179 i
= netxen_get_cmd_desc_totallength(&hw
->cmd_desc_head
[saved_producer
]);
1181 hw
->cmd_desc_head
[saved_producer
].flags_opcode
=
1182 cpu_to_le16(hw
->cmd_desc_head
[saved_producer
].flags_opcode
);
1183 hw
->cmd_desc_head
[saved_producer
].num_of_buffers_total_length
=
1184 cpu_to_le32(hw
->cmd_desc_head
[saved_producer
].
1185 num_of_buffers_total_length
);
1187 spin_lock_bh(&adapter
->tx_lock
);
1188 adapter
->stats
.txbytes
+= i
;
1190 /* Code to update the adapter considering how many producer threads
1191 are currently working */
1192 if ((--adapter
->num_threads
) == 0) {
1193 /* This is the last thread */
1194 u32 crb_producer
= adapter
->cmd_producer
;
1195 netxen_nic_update_cmd_producer(adapter
, crb_producer
);
1197 adapter
->total_threads
= 0;
1200 adapter
->stats
.xmitfinished
++;
1201 spin_unlock_bh(&adapter
->tx_lock
);
1203 netdev
->trans_start
= jiffies
;
1205 DPRINTK(INFO
, "wrote CMD producer %x to phantom\n", producer
);
1207 DPRINTK(INFO
, "Done. Send\n");
1208 return NETDEV_TX_OK
;
1211 static void netxen_watchdog(unsigned long v
)
1213 struct netxen_adapter
*adapter
= (struct netxen_adapter
*)v
;
1215 SCHEDULE_WORK(&adapter
->watchdog_task
);
1218 static void netxen_tx_timeout(struct net_device
*netdev
)
1220 struct netxen_adapter
*adapter
= (struct netxen_adapter
*)
1221 netdev_priv(netdev
);
1222 SCHEDULE_WORK(&adapter
->tx_timeout_task
);
1225 static void netxen_tx_timeout_task(struct work_struct
*work
)
1227 struct netxen_adapter
*adapter
=
1228 container_of(work
, struct netxen_adapter
, tx_timeout_task
);
1229 unsigned long flags
;
1231 printk(KERN_ERR
"%s %s: transmit timeout, resetting.\n",
1232 netxen_nic_driver_name
, adapter
->netdev
->name
);
1234 spin_lock_irqsave(&adapter
->lock
, flags
);
1235 netxen_nic_close(adapter
->netdev
);
1236 netxen_nic_open(adapter
->netdev
);
1237 spin_unlock_irqrestore(&adapter
->lock
, flags
);
1238 adapter
->netdev
->trans_start
= jiffies
;
1239 netif_wake_queue(adapter
->netdev
);
1243 netxen_handle_int(struct netxen_adapter
*adapter
, struct net_device
*netdev
)
1248 DPRINTK(INFO
, "Entered handle ISR\n");
1249 adapter
->stats
.ints
++;
1251 if (!(adapter
->flags
& NETXEN_NIC_MSI_ENABLED
)) {
1252 our_int
= readl(NETXEN_CRB_NORMALIZE(adapter
, CRB_INT_VECTOR
));
1253 /* not our interrupt */
1254 if ((our_int
& (0x80 << adapter
->portnum
)) == 0)
1258 netxen_nic_disable_int(adapter
);
1260 if (adapter
->intr_scheme
== INTR_SCHEME_PERPORT
) {
1261 /* claim interrupt */
1262 if (!(adapter
->flags
& NETXEN_NIC_MSI_ENABLED
)) {
1263 writel(our_int
& ~((u32
)(0x80 << adapter
->portnum
)),
1264 NETXEN_CRB_NORMALIZE(adapter
, CRB_INT_VECTOR
));
1268 if (netxen_nic_rx_has_work(adapter
) || netxen_nic_tx_has_work(adapter
)) {
1269 if (netif_rx_schedule_prep(netdev
)) {
1271 * Interrupts are already disabled.
1273 __netif_rx_schedule(netdev
);
1275 static unsigned int intcount
= 0;
1276 if ((++intcount
& 0xfff) == 0xfff)
1278 "%s: %s interrupt %d while in poll\n",
1279 netxen_nic_driver_name
, netdev
->name
,
1286 netxen_nic_enable_int(adapter
);
1293 * netxen_intr - Interrupt Handler
1294 * @irq: interrupt number
1295 * data points to adapter stucture (which may be handling more than 1 port
1297 irqreturn_t
netxen_intr(int irq
, void *data
)
1299 struct netxen_adapter
*adapter
;
1300 struct net_device
*netdev
;
1302 if (unlikely(!irq
)) {
1303 return IRQ_NONE
; /* Not our interrupt */
1306 adapter
= (struct netxen_adapter
*)data
;
1307 netdev
= adapter
->netdev
;
1308 /* process our status queue (for all 4 ports) */
1309 if (netif_running(netdev
))
1310 netxen_handle_int(adapter
, netdev
);
1315 static int netxen_nic_poll(struct net_device
*netdev
, int *budget
)
1317 struct netxen_adapter
*adapter
= netdev_priv(netdev
);
1318 int work_to_do
= min(*budget
, netdev
->quota
);
1324 DPRINTK(INFO
, "polling for %d descriptors\n", *budget
);
1327 for (ctx
= 0; ctx
< MAX_RCV_CTX
; ++ctx
) {
1329 * Fairness issue. This will give undue weight to the
1330 * receive context 0.
1334 * To avoid starvation, we give each of our receivers,
1335 * a fraction of the quota. Sometimes, it might happen that we
1336 * have enough quota to process every packet, but since all the
1337 * packets are on one context, it gets only half of the quota,
1338 * and ends up not processing it.
1340 this_work_done
= netxen_process_rcv_ring(adapter
, ctx
,
1343 work_done
+= this_work_done
;
1346 netdev
->quota
-= work_done
;
1347 *budget
-= work_done
;
1349 if (work_done
>= work_to_do
&& netxen_nic_rx_has_work(adapter
) != 0)
1352 if (netxen_process_cmd_ring((unsigned long)adapter
) == 0)
1355 DPRINTK(INFO
, "new work_done: %d work_to_do: %d\n",
1356 work_done
, work_to_do
);
1358 netif_rx_complete(netdev
);
1359 netxen_nic_enable_int(adapter
);
1365 #ifdef CONFIG_NET_POLL_CONTROLLER
1366 static void netxen_nic_poll_controller(struct net_device
*netdev
)
1368 struct netxen_adapter
*adapter
= netdev_priv(netdev
);
1369 disable_irq(adapter
->irq
);
1370 netxen_intr(adapter
->irq
, adapter
);
1371 enable_irq(adapter
->irq
);
1375 static struct pci_driver netxen_driver
= {
1376 .name
= netxen_nic_driver_name
,
1377 .id_table
= netxen_pci_tbl
,
1378 .probe
= netxen_nic_probe
,
1379 .remove
= __devexit_p(netxen_nic_remove
)
1382 /* Driver Registration on NetXen card */
1384 static int __init
netxen_init_module(void)
1386 if ((netxen_workq
= create_singlethread_workqueue("netxen")) == 0)
1389 return pci_register_driver(&netxen_driver
);
1392 module_init(netxen_init_module
);
1394 static void __exit
netxen_exit_module(void)
1397 * Wait for some time to allow the dma to drain, if any.
1400 pci_unregister_driver(&netxen_driver
);
1401 destroy_workqueue(netxen_workq
);
1404 module_exit(netxen_exit_module
);