1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2006-2008 Solarflare Communications Inc.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation, incorporated herein by reference.
11 #include <linux/bitops.h>
12 #include <linux/delay.h>
13 #include <linux/pci.h>
14 #include <linux/module.h>
15 #include <linux/seq_file.h>
16 #include <linux/i2c.h>
17 #include <linux/i2c-algo-bit.h>
18 #include "net_driver.h"
25 #include "falcon_hwdefs.h"
26 #include "falcon_io.h"
30 #include "workarounds.h"
32 /* Falcon hardware control.
33 * Falcon is the internal codename for the SFC4000 controller that is
34 * present in SFE400X evaluation boards
38 * struct falcon_nic_data - Falcon NIC state
39 * @next_buffer_table: First available buffer table id
40 * @pci_dev2: The secondary PCI device if present
41 * @i2c_data: Operations and state for I2C bit-bashing algorithm
43 struct falcon_nic_data
{
44 unsigned next_buffer_table
;
45 struct pci_dev
*pci_dev2
;
46 struct i2c_algo_bit_data i2c_data
;
49 /**************************************************************************
53 **************************************************************************
56 static int disable_dma_stats
;
58 /* This is set to 16 for a good reason. In summary, if larger than
59 * 16, the descriptor cache holds more than a default socket
60 * buffer's worth of packets (for UDP we can only have at most one
61 * socket buffer's worth outstanding). This combined with the fact
62 * that we only get 1 TX event per descriptor cache means the NIC
65 #define TX_DC_ENTRIES 16
66 #define TX_DC_ENTRIES_ORDER 0
67 #define TX_DC_BASE 0x130000
69 #define RX_DC_ENTRIES 64
70 #define RX_DC_ENTRIES_ORDER 2
71 #define RX_DC_BASE 0x100000
73 /* RX FIFO XOFF watermark
75 * When the amount of the RX FIFO increases used increases past this
76 * watermark send XOFF. Only used if RX flow control is enabled (ethtool -A)
77 * This also has an effect on RX/TX arbitration
79 static int rx_xoff_thresh_bytes
= -1;
80 module_param(rx_xoff_thresh_bytes
, int, 0644);
81 MODULE_PARM_DESC(rx_xoff_thresh_bytes
, "RX fifo XOFF threshold");
83 /* RX FIFO XON watermark
85 * When the amount of the RX FIFO used decreases below this
86 * watermark send XON. Only used if TX flow control is enabled (ethtool -A)
87 * This also has an effect on RX/TX arbitration
89 static int rx_xon_thresh_bytes
= -1;
90 module_param(rx_xon_thresh_bytes
, int, 0644);
91 MODULE_PARM_DESC(rx_xon_thresh_bytes
, "RX fifo XON threshold");
93 /* TX descriptor ring size - min 512 max 4k */
94 #define FALCON_TXD_RING_ORDER TX_DESCQ_SIZE_1K
95 #define FALCON_TXD_RING_SIZE 1024
96 #define FALCON_TXD_RING_MASK (FALCON_TXD_RING_SIZE - 1)
98 /* RX descriptor ring size - min 512 max 4k */
99 #define FALCON_RXD_RING_ORDER RX_DESCQ_SIZE_1K
100 #define FALCON_RXD_RING_SIZE 1024
101 #define FALCON_RXD_RING_MASK (FALCON_RXD_RING_SIZE - 1)
103 /* Event queue size - max 32k */
104 #define FALCON_EVQ_ORDER EVQ_SIZE_4K
105 #define FALCON_EVQ_SIZE 4096
106 #define FALCON_EVQ_MASK (FALCON_EVQ_SIZE - 1)
108 /* Max number of internal errors. After this resets will not be performed */
109 #define FALCON_MAX_INT_ERRORS 4
111 /* Maximum period that we wait for flush events. If the flush event
112 * doesn't arrive in this period of time then we check if the queue
113 * was disabled anyway. */
114 #define FALCON_FLUSH_TIMEOUT 10 /* 10ms */
116 /**************************************************************************
120 **************************************************************************
123 /* DMA address mask */
124 #define FALCON_DMA_MASK DMA_BIT_MASK(46)
126 /* TX DMA length mask (13-bit) */
127 #define FALCON_TX_DMA_MASK (4096 - 1)
129 /* Size and alignment of special buffers (4KB) */
130 #define FALCON_BUF_SIZE 4096
132 /* Dummy SRAM size code */
133 #define SRM_NB_BSZ_ONCHIP_ONLY (-1)
135 /* Be nice if these (or equiv.) were in linux/pci_regs.h, but they're not. */
136 #define PCI_EXP_DEVCAP_PWR_VAL_LBN 18
137 #define PCI_EXP_DEVCAP_PWR_SCL_LBN 26
138 #define PCI_EXP_DEVCTL_PAYLOAD_LBN 5
139 #define PCI_EXP_LNKSTA_LNK_WID 0x3f0
140 #define PCI_EXP_LNKSTA_LNK_WID_LBN 4
142 #define FALCON_IS_DUAL_FUNC(efx) \
143 (falcon_rev(efx) < FALCON_REV_B0)
145 /**************************************************************************
147 * Falcon hardware access
149 **************************************************************************/
151 /* Read the current event from the event queue */
152 static inline efx_qword_t
*falcon_event(struct efx_channel
*channel
,
155 return (((efx_qword_t
*) (channel
->eventq
.addr
)) + index
);
158 /* See if an event is present
160 * We check both the high and low dword of the event for all ones. We
161 * wrote all ones when we cleared the event, and no valid event can
162 * have all ones in either its high or low dwords. This approach is
163 * robust against reordering.
165 * Note that using a single 64-bit comparison is incorrect; even
166 * though the CPU read will be atomic, the DMA write may not be.
168 static inline int falcon_event_present(efx_qword_t
*event
)
170 return (!(EFX_DWORD_IS_ALL_ONES(event
->dword
[0]) |
171 EFX_DWORD_IS_ALL_ONES(event
->dword
[1])));
174 /**************************************************************************
176 * I2C bus - this is a bit-bashing interface using GPIO pins
177 * Note that it uses the output enables to tristate the outputs
178 * SDA is the data pin and SCL is the clock
180 **************************************************************************
182 static void falcon_setsda(void *data
, int state
)
184 struct efx_nic
*efx
= (struct efx_nic
*)data
;
187 falcon_read(efx
, ®
, GPIO_CTL_REG_KER
);
188 EFX_SET_OWORD_FIELD(reg
, GPIO3_OEN
, !state
);
189 falcon_write(efx
, ®
, GPIO_CTL_REG_KER
);
192 static void falcon_setscl(void *data
, int state
)
194 struct efx_nic
*efx
= (struct efx_nic
*)data
;
197 falcon_read(efx
, ®
, GPIO_CTL_REG_KER
);
198 EFX_SET_OWORD_FIELD(reg
, GPIO0_OEN
, !state
);
199 falcon_write(efx
, ®
, GPIO_CTL_REG_KER
);
202 static int falcon_getsda(void *data
)
204 struct efx_nic
*efx
= (struct efx_nic
*)data
;
207 falcon_read(efx
, ®
, GPIO_CTL_REG_KER
);
208 return EFX_OWORD_FIELD(reg
, GPIO3_IN
);
211 static int falcon_getscl(void *data
)
213 struct efx_nic
*efx
= (struct efx_nic
*)data
;
216 falcon_read(efx
, ®
, GPIO_CTL_REG_KER
);
217 return EFX_OWORD_FIELD(reg
, GPIO0_IN
);
220 static struct i2c_algo_bit_data falcon_i2c_bit_operations
= {
221 .setsda
= falcon_setsda
,
222 .setscl
= falcon_setscl
,
223 .getsda
= falcon_getsda
,
224 .getscl
= falcon_getscl
,
226 /* Wait up to 50 ms for slave to let us pull SCL high */
227 .timeout
= DIV_ROUND_UP(HZ
, 20),
230 /**************************************************************************
232 * Falcon special buffer handling
233 * Special buffers are used for event queues and the TX and RX
236 *************************************************************************/
239 * Initialise a Falcon special buffer
241 * This will define a buffer (previously allocated via
242 * falcon_alloc_special_buffer()) in Falcon's buffer table, allowing
243 * it to be used for event queues, descriptor rings etc.
246 falcon_init_special_buffer(struct efx_nic
*efx
,
247 struct efx_special_buffer
*buffer
)
249 efx_qword_t buf_desc
;
254 EFX_BUG_ON_PARANOID(!buffer
->addr
);
256 /* Write buffer descriptors to NIC */
257 for (i
= 0; i
< buffer
->entries
; i
++) {
258 index
= buffer
->index
+ i
;
259 dma_addr
= buffer
->dma_addr
+ (i
* 4096);
260 EFX_LOG(efx
, "mapping special buffer %d at %llx\n",
261 index
, (unsigned long long)dma_addr
);
262 EFX_POPULATE_QWORD_4(buf_desc
,
263 IP_DAT_BUF_SIZE
, IP_DAT_BUF_SIZE_4K
,
265 BUF_ADR_FBUF
, (dma_addr
>> 12),
266 BUF_OWNER_ID_FBUF
, 0);
267 falcon_write_sram(efx
, &buf_desc
, index
);
273 /* Unmaps a buffer from Falcon and clears the buffer table entries */
275 falcon_fini_special_buffer(struct efx_nic
*efx
,
276 struct efx_special_buffer
*buffer
)
278 efx_oword_t buf_tbl_upd
;
279 unsigned int start
= buffer
->index
;
280 unsigned int end
= (buffer
->index
+ buffer
->entries
- 1);
282 if (!buffer
->entries
)
285 EFX_LOG(efx
, "unmapping special buffers %d-%d\n",
286 buffer
->index
, buffer
->index
+ buffer
->entries
- 1);
288 EFX_POPULATE_OWORD_4(buf_tbl_upd
,
292 BUF_CLR_START_ID
, start
);
293 falcon_write(efx
, &buf_tbl_upd
, BUF_TBL_UPD_REG_KER
);
297 * Allocate a new Falcon special buffer
299 * This allocates memory for a new buffer, clears it and allocates a
300 * new buffer ID range. It does not write into Falcon's buffer table.
302 * This call will allocate 4KB buffers, since Falcon can't use 8KB
303 * buffers for event queues and descriptor rings.
305 static int falcon_alloc_special_buffer(struct efx_nic
*efx
,
306 struct efx_special_buffer
*buffer
,
309 struct falcon_nic_data
*nic_data
= efx
->nic_data
;
311 len
= ALIGN(len
, FALCON_BUF_SIZE
);
313 buffer
->addr
= pci_alloc_consistent(efx
->pci_dev
, len
,
318 buffer
->entries
= len
/ FALCON_BUF_SIZE
;
319 BUG_ON(buffer
->dma_addr
& (FALCON_BUF_SIZE
- 1));
321 /* All zeros is a potentially valid event so memset to 0xff */
322 memset(buffer
->addr
, 0xff, len
);
324 /* Select new buffer ID */
325 buffer
->index
= nic_data
->next_buffer_table
;
326 nic_data
->next_buffer_table
+= buffer
->entries
;
328 EFX_LOG(efx
, "allocating special buffers %d-%d at %llx+%x "
329 "(virt %p phys %lx)\n", buffer
->index
,
330 buffer
->index
+ buffer
->entries
- 1,
331 (unsigned long long)buffer
->dma_addr
, len
,
332 buffer
->addr
, virt_to_phys(buffer
->addr
));
337 static void falcon_free_special_buffer(struct efx_nic
*efx
,
338 struct efx_special_buffer
*buffer
)
343 EFX_LOG(efx
, "deallocating special buffers %d-%d at %llx+%x "
344 "(virt %p phys %lx)\n", buffer
->index
,
345 buffer
->index
+ buffer
->entries
- 1,
346 (unsigned long long)buffer
->dma_addr
, buffer
->len
,
347 buffer
->addr
, virt_to_phys(buffer
->addr
));
349 pci_free_consistent(efx
->pci_dev
, buffer
->len
, buffer
->addr
,
355 /**************************************************************************
357 * Falcon generic buffer handling
358 * These buffers are used for interrupt status and MAC stats
360 **************************************************************************/
362 static int falcon_alloc_buffer(struct efx_nic
*efx
,
363 struct efx_buffer
*buffer
, unsigned int len
)
365 buffer
->addr
= pci_alloc_consistent(efx
->pci_dev
, len
,
370 memset(buffer
->addr
, 0, len
);
374 static void falcon_free_buffer(struct efx_nic
*efx
, struct efx_buffer
*buffer
)
377 pci_free_consistent(efx
->pci_dev
, buffer
->len
,
378 buffer
->addr
, buffer
->dma_addr
);
383 /**************************************************************************
387 **************************************************************************/
389 /* Returns a pointer to the specified transmit descriptor in the TX
390 * descriptor queue belonging to the specified channel.
392 static inline efx_qword_t
*falcon_tx_desc(struct efx_tx_queue
*tx_queue
,
395 return (((efx_qword_t
*) (tx_queue
->txd
.addr
)) + index
);
398 /* This writes to the TX_DESC_WPTR; write pointer for TX descriptor ring */
399 static inline void falcon_notify_tx_desc(struct efx_tx_queue
*tx_queue
)
404 write_ptr
= tx_queue
->write_count
& FALCON_TXD_RING_MASK
;
405 EFX_POPULATE_DWORD_1(reg
, TX_DESC_WPTR_DWORD
, write_ptr
);
406 falcon_writel_page(tx_queue
->efx
, ®
,
407 TX_DESC_UPD_REG_KER_DWORD
, tx_queue
->queue
);
411 /* For each entry inserted into the software descriptor ring, create a
412 * descriptor in the hardware TX descriptor ring (in host memory), and
415 void falcon_push_buffers(struct efx_tx_queue
*tx_queue
)
418 struct efx_tx_buffer
*buffer
;
422 BUG_ON(tx_queue
->write_count
== tx_queue
->insert_count
);
425 write_ptr
= tx_queue
->write_count
& FALCON_TXD_RING_MASK
;
426 buffer
= &tx_queue
->buffer
[write_ptr
];
427 txd
= falcon_tx_desc(tx_queue
, write_ptr
);
428 ++tx_queue
->write_count
;
430 /* Create TX descriptor ring entry */
431 EFX_POPULATE_QWORD_5(*txd
,
433 TX_KER_CONT
, buffer
->continuation
,
434 TX_KER_BYTE_CNT
, buffer
->len
,
435 TX_KER_BUF_REGION
, 0,
436 TX_KER_BUF_ADR
, buffer
->dma_addr
);
437 } while (tx_queue
->write_count
!= tx_queue
->insert_count
);
439 wmb(); /* Ensure descriptors are written before they are fetched */
440 falcon_notify_tx_desc(tx_queue
);
443 /* Allocate hardware resources for a TX queue */
444 int falcon_probe_tx(struct efx_tx_queue
*tx_queue
)
446 struct efx_nic
*efx
= tx_queue
->efx
;
447 return falcon_alloc_special_buffer(efx
, &tx_queue
->txd
,
448 FALCON_TXD_RING_SIZE
*
449 sizeof(efx_qword_t
));
452 int falcon_init_tx(struct efx_tx_queue
*tx_queue
)
454 efx_oword_t tx_desc_ptr
;
455 struct efx_nic
*efx
= tx_queue
->efx
;
458 /* Pin TX descriptor ring */
459 rc
= falcon_init_special_buffer(efx
, &tx_queue
->txd
);
463 /* Push TX descriptor ring to card */
464 EFX_POPULATE_OWORD_10(tx_desc_ptr
,
468 TX_DESCQ_BUF_BASE_ID
, tx_queue
->txd
.index
,
469 TX_DESCQ_EVQ_ID
, tx_queue
->channel
->evqnum
,
470 TX_DESCQ_OWNER_ID
, 0,
471 TX_DESCQ_LABEL
, tx_queue
->queue
,
472 TX_DESCQ_SIZE
, FALCON_TXD_RING_ORDER
,
474 TX_NON_IP_DROP_DIS_B0
, 1);
476 if (falcon_rev(efx
) >= FALCON_REV_B0
) {
477 int csum
= !(efx
->net_dev
->features
& NETIF_F_IP_CSUM
);
478 EFX_SET_OWORD_FIELD(tx_desc_ptr
, TX_IP_CHKSM_DIS_B0
, csum
);
479 EFX_SET_OWORD_FIELD(tx_desc_ptr
, TX_TCP_CHKSM_DIS_B0
, csum
);
482 falcon_write_table(efx
, &tx_desc_ptr
, efx
->type
->txd_ptr_tbl_base
,
485 if (falcon_rev(efx
) < FALCON_REV_B0
) {
488 BUG_ON(tx_queue
->queue
>= 128); /* HW limit */
490 falcon_read(efx
, ®
, TX_CHKSM_CFG_REG_KER_A1
);
491 if (efx
->net_dev
->features
& NETIF_F_IP_CSUM
)
492 clear_bit_le(tx_queue
->queue
, (void *)®
);
494 set_bit_le(tx_queue
->queue
, (void *)®
);
495 falcon_write(efx
, ®
, TX_CHKSM_CFG_REG_KER_A1
);
501 static int falcon_flush_tx_queue(struct efx_tx_queue
*tx_queue
)
503 struct efx_nic
*efx
= tx_queue
->efx
;
504 struct efx_channel
*channel
= &efx
->channel
[0];
505 efx_oword_t tx_flush_descq
;
506 unsigned int read_ptr
, i
;
508 /* Post a flush command */
509 EFX_POPULATE_OWORD_2(tx_flush_descq
,
510 TX_FLUSH_DESCQ_CMD
, 1,
511 TX_FLUSH_DESCQ
, tx_queue
->queue
);
512 falcon_write(efx
, &tx_flush_descq
, TX_FLUSH_DESCQ_REG_KER
);
513 msleep(FALCON_FLUSH_TIMEOUT
);
515 if (EFX_WORKAROUND_7803(efx
))
518 /* Look for a flush completed event */
519 read_ptr
= channel
->eventq_read_ptr
;
520 for (i
= 0; i
< FALCON_EVQ_SIZE
; ++i
) {
521 efx_qword_t
*event
= falcon_event(channel
, read_ptr
);
522 int ev_code
, ev_sub_code
, ev_queue
;
523 if (!falcon_event_present(event
))
526 ev_code
= EFX_QWORD_FIELD(*event
, EV_CODE
);
527 ev_sub_code
= EFX_QWORD_FIELD(*event
, DRIVER_EV_SUB_CODE
);
528 ev_queue
= EFX_QWORD_FIELD(*event
, DRIVER_EV_TX_DESCQ_ID
);
529 if ((ev_sub_code
== TX_DESCQ_FLS_DONE_EV_DECODE
) &&
530 (ev_queue
== tx_queue
->queue
)) {
531 EFX_LOG(efx
, "tx queue %d flush command succesful\n",
536 read_ptr
= (read_ptr
+ 1) & FALCON_EVQ_MASK
;
539 if (EFX_WORKAROUND_11557(efx
)) {
543 falcon_read_table(efx
, ®
, efx
->type
->txd_ptr_tbl_base
,
545 enabled
= EFX_OWORD_FIELD(reg
, TX_DESCQ_EN
);
547 EFX_LOG(efx
, "tx queue %d disabled without a "
548 "flush event seen\n", tx_queue
->queue
);
553 EFX_ERR(efx
, "tx queue %d flush command timed out\n", tx_queue
->queue
);
557 void falcon_fini_tx(struct efx_tx_queue
*tx_queue
)
559 struct efx_nic
*efx
= tx_queue
->efx
;
560 efx_oword_t tx_desc_ptr
;
562 /* Stop the hardware using the queue */
563 if (falcon_flush_tx_queue(tx_queue
))
564 EFX_ERR(efx
, "failed to flush tx queue %d\n", tx_queue
->queue
);
566 /* Remove TX descriptor ring from card */
567 EFX_ZERO_OWORD(tx_desc_ptr
);
568 falcon_write_table(efx
, &tx_desc_ptr
, efx
->type
->txd_ptr_tbl_base
,
571 /* Unpin TX descriptor ring */
572 falcon_fini_special_buffer(efx
, &tx_queue
->txd
);
575 /* Free buffers backing TX queue */
576 void falcon_remove_tx(struct efx_tx_queue
*tx_queue
)
578 falcon_free_special_buffer(tx_queue
->efx
, &tx_queue
->txd
);
581 /**************************************************************************
585 **************************************************************************/
587 /* Returns a pointer to the specified descriptor in the RX descriptor queue */
588 static inline efx_qword_t
*falcon_rx_desc(struct efx_rx_queue
*rx_queue
,
591 return (((efx_qword_t
*) (rx_queue
->rxd
.addr
)) + index
);
594 /* This creates an entry in the RX descriptor queue */
595 static inline void falcon_build_rx_desc(struct efx_rx_queue
*rx_queue
,
598 struct efx_rx_buffer
*rx_buf
;
601 rxd
= falcon_rx_desc(rx_queue
, index
);
602 rx_buf
= efx_rx_buffer(rx_queue
, index
);
603 EFX_POPULATE_QWORD_3(*rxd
,
606 rx_queue
->efx
->type
->rx_buffer_padding
,
607 RX_KER_BUF_REGION
, 0,
608 RX_KER_BUF_ADR
, rx_buf
->dma_addr
);
611 /* This writes to the RX_DESC_WPTR register for the specified receive
614 void falcon_notify_rx_desc(struct efx_rx_queue
*rx_queue
)
619 while (rx_queue
->notified_count
!= rx_queue
->added_count
) {
620 falcon_build_rx_desc(rx_queue
,
621 rx_queue
->notified_count
&
622 FALCON_RXD_RING_MASK
);
623 ++rx_queue
->notified_count
;
627 write_ptr
= rx_queue
->added_count
& FALCON_RXD_RING_MASK
;
628 EFX_POPULATE_DWORD_1(reg
, RX_DESC_WPTR_DWORD
, write_ptr
);
629 falcon_writel_page(rx_queue
->efx
, ®
,
630 RX_DESC_UPD_REG_KER_DWORD
, rx_queue
->queue
);
633 int falcon_probe_rx(struct efx_rx_queue
*rx_queue
)
635 struct efx_nic
*efx
= rx_queue
->efx
;
636 return falcon_alloc_special_buffer(efx
, &rx_queue
->rxd
,
637 FALCON_RXD_RING_SIZE
*
638 sizeof(efx_qword_t
));
641 int falcon_init_rx(struct efx_rx_queue
*rx_queue
)
643 efx_oword_t rx_desc_ptr
;
644 struct efx_nic
*efx
= rx_queue
->efx
;
646 int is_b0
= falcon_rev(efx
) >= FALCON_REV_B0
;
647 int iscsi_digest_en
= is_b0
;
649 EFX_LOG(efx
, "RX queue %d ring in special buffers %d-%d\n",
650 rx_queue
->queue
, rx_queue
->rxd
.index
,
651 rx_queue
->rxd
.index
+ rx_queue
->rxd
.entries
- 1);
653 /* Pin RX descriptor ring */
654 rc
= falcon_init_special_buffer(efx
, &rx_queue
->rxd
);
658 /* Push RX descriptor ring to card */
659 EFX_POPULATE_OWORD_10(rx_desc_ptr
,
660 RX_ISCSI_DDIG_EN
, iscsi_digest_en
,
661 RX_ISCSI_HDIG_EN
, iscsi_digest_en
,
662 RX_DESCQ_BUF_BASE_ID
, rx_queue
->rxd
.index
,
663 RX_DESCQ_EVQ_ID
, rx_queue
->channel
->evqnum
,
664 RX_DESCQ_OWNER_ID
, 0,
665 RX_DESCQ_LABEL
, rx_queue
->queue
,
666 RX_DESCQ_SIZE
, FALCON_RXD_RING_ORDER
,
667 RX_DESCQ_TYPE
, 0 /* kernel queue */ ,
668 /* For >=B0 this is scatter so disable */
669 RX_DESCQ_JUMBO
, !is_b0
,
671 falcon_write_table(efx
, &rx_desc_ptr
, efx
->type
->rxd_ptr_tbl_base
,
676 static int falcon_flush_rx_queue(struct efx_rx_queue
*rx_queue
)
678 struct efx_nic
*efx
= rx_queue
->efx
;
679 struct efx_channel
*channel
= &efx
->channel
[0];
680 unsigned int read_ptr
, i
;
681 efx_oword_t rx_flush_descq
;
683 /* Post a flush command */
684 EFX_POPULATE_OWORD_2(rx_flush_descq
,
685 RX_FLUSH_DESCQ_CMD
, 1,
686 RX_FLUSH_DESCQ
, rx_queue
->queue
);
687 falcon_write(efx
, &rx_flush_descq
, RX_FLUSH_DESCQ_REG_KER
);
688 msleep(FALCON_FLUSH_TIMEOUT
);
690 if (EFX_WORKAROUND_7803(efx
))
693 /* Look for a flush completed event */
694 read_ptr
= channel
->eventq_read_ptr
;
695 for (i
= 0; i
< FALCON_EVQ_SIZE
; ++i
) {
696 efx_qword_t
*event
= falcon_event(channel
, read_ptr
);
697 int ev_code
, ev_sub_code
, ev_queue
, ev_failed
;
698 if (!falcon_event_present(event
))
701 ev_code
= EFX_QWORD_FIELD(*event
, EV_CODE
);
702 ev_sub_code
= EFX_QWORD_FIELD(*event
, DRIVER_EV_SUB_CODE
);
703 ev_queue
= EFX_QWORD_FIELD(*event
, DRIVER_EV_RX_DESCQ_ID
);
704 ev_failed
= EFX_QWORD_FIELD(*event
, DRIVER_EV_RX_FLUSH_FAIL
);
706 if ((ev_sub_code
== RX_DESCQ_FLS_DONE_EV_DECODE
) &&
707 (ev_queue
== rx_queue
->queue
)) {
709 EFX_INFO(efx
, "rx queue %d flush command "
710 "failed\n", rx_queue
->queue
);
713 EFX_LOG(efx
, "rx queue %d flush command "
714 "succesful\n", rx_queue
->queue
);
719 read_ptr
= (read_ptr
+ 1) & FALCON_EVQ_MASK
;
722 if (EFX_WORKAROUND_11557(efx
)) {
726 falcon_read_table(efx
, ®
, efx
->type
->rxd_ptr_tbl_base
,
728 enabled
= EFX_OWORD_FIELD(reg
, RX_DESCQ_EN
);
730 EFX_LOG(efx
, "rx queue %d disabled without a "
731 "flush event seen\n", rx_queue
->queue
);
736 EFX_ERR(efx
, "rx queue %d flush command timed out\n", rx_queue
->queue
);
740 void falcon_fini_rx(struct efx_rx_queue
*rx_queue
)
742 efx_oword_t rx_desc_ptr
;
743 struct efx_nic
*efx
= rx_queue
->efx
;
746 /* Try and flush the rx queue. This may need to be repeated */
747 for (i
= 0; i
< 5; i
++) {
748 rc
= falcon_flush_rx_queue(rx_queue
);
754 EFX_ERR(efx
, "failed to flush rx queue %d\n", rx_queue
->queue
);
755 efx_schedule_reset(efx
, RESET_TYPE_INVISIBLE
);
758 /* Remove RX descriptor ring from card */
759 EFX_ZERO_OWORD(rx_desc_ptr
);
760 falcon_write_table(efx
, &rx_desc_ptr
, efx
->type
->rxd_ptr_tbl_base
,
763 /* Unpin RX descriptor ring */
764 falcon_fini_special_buffer(efx
, &rx_queue
->rxd
);
767 /* Free buffers backing RX queue */
768 void falcon_remove_rx(struct efx_rx_queue
*rx_queue
)
770 falcon_free_special_buffer(rx_queue
->efx
, &rx_queue
->rxd
);
773 /**************************************************************************
775 * Falcon event queue processing
776 * Event queues are processed by per-channel tasklets.
778 **************************************************************************/
780 /* Update a channel's event queue's read pointer (RPTR) register
782 * This writes the EVQ_RPTR_REG register for the specified channel's
785 * Note that EVQ_RPTR_REG contains the index of the "last read" event,
786 * whereas channel->eventq_read_ptr contains the index of the "next to
789 void falcon_eventq_read_ack(struct efx_channel
*channel
)
792 struct efx_nic
*efx
= channel
->efx
;
794 EFX_POPULATE_DWORD_1(reg
, EVQ_RPTR_DWORD
, channel
->eventq_read_ptr
);
795 falcon_writel_table(efx
, ®
, efx
->type
->evq_rptr_tbl_base
,
799 /* Use HW to insert a SW defined event */
800 void falcon_generate_event(struct efx_channel
*channel
, efx_qword_t
*event
)
802 efx_oword_t drv_ev_reg
;
804 EFX_POPULATE_OWORD_2(drv_ev_reg
,
805 DRV_EV_QID
, channel
->evqnum
,
807 EFX_QWORD_FIELD64(*event
, WHOLE_EVENT
));
808 falcon_write(channel
->efx
, &drv_ev_reg
, DRV_EV_REG_KER
);
811 /* Handle a transmit completion event
813 * Falcon batches TX completion events; the message we receive is of
814 * the form "complete all TX events up to this index".
816 static inline void falcon_handle_tx_event(struct efx_channel
*channel
,
819 unsigned int tx_ev_desc_ptr
;
820 unsigned int tx_ev_q_label
;
821 struct efx_tx_queue
*tx_queue
;
822 struct efx_nic
*efx
= channel
->efx
;
824 if (likely(EFX_QWORD_FIELD(*event
, TX_EV_COMP
))) {
825 /* Transmit completion */
826 tx_ev_desc_ptr
= EFX_QWORD_FIELD(*event
, TX_EV_DESC_PTR
);
827 tx_ev_q_label
= EFX_QWORD_FIELD(*event
, TX_EV_Q_LABEL
);
828 tx_queue
= &efx
->tx_queue
[tx_ev_q_label
];
829 efx_xmit_done(tx_queue
, tx_ev_desc_ptr
);
830 } else if (EFX_QWORD_FIELD(*event
, TX_EV_WQ_FF_FULL
)) {
831 /* Rewrite the FIFO write pointer */
832 tx_ev_q_label
= EFX_QWORD_FIELD(*event
, TX_EV_Q_LABEL
);
833 tx_queue
= &efx
->tx_queue
[tx_ev_q_label
];
835 if (efx_dev_registered(efx
))
836 netif_tx_lock(efx
->net_dev
);
837 falcon_notify_tx_desc(tx_queue
);
838 if (efx_dev_registered(efx
))
839 netif_tx_unlock(efx
->net_dev
);
840 } else if (EFX_QWORD_FIELD(*event
, TX_EV_PKT_ERR
) &&
841 EFX_WORKAROUND_10727(efx
)) {
842 efx_schedule_reset(efx
, RESET_TYPE_TX_DESC_FETCH
);
844 EFX_ERR(efx
, "channel %d unexpected TX event "
845 EFX_QWORD_FMT
"\n", channel
->channel
,
846 EFX_QWORD_VAL(*event
));
850 /* Check received packet's destination MAC address. */
851 static int check_dest_mac(struct efx_rx_queue
*rx_queue
,
852 const efx_qword_t
*event
)
854 struct efx_rx_buffer
*rx_buf
;
855 struct efx_nic
*efx
= rx_queue
->efx
;
859 if (efx
->promiscuous
)
862 rx_ev_desc_ptr
= EFX_QWORD_FIELD(*event
, RX_EV_DESC_PTR
);
863 rx_buf
= efx_rx_buffer(rx_queue
, rx_ev_desc_ptr
);
864 eh
= (struct ethhdr
*)rx_buf
->data
;
865 if (memcmp(eh
->h_dest
, efx
->net_dev
->dev_addr
, ETH_ALEN
))
870 /* Detect errors included in the rx_evt_pkt_ok bit. */
871 static void falcon_handle_rx_not_ok(struct efx_rx_queue
*rx_queue
,
872 const efx_qword_t
*event
,
873 unsigned *rx_ev_pkt_ok
,
874 int *discard
, int byte_count
)
876 struct efx_nic
*efx
= rx_queue
->efx
;
877 unsigned rx_ev_buf_owner_id_err
, rx_ev_ip_hdr_chksum_err
;
878 unsigned rx_ev_tcp_udp_chksum_err
, rx_ev_eth_crc_err
;
879 unsigned rx_ev_frm_trunc
, rx_ev_drib_nib
, rx_ev_tobe_disc
;
880 unsigned rx_ev_pkt_type
, rx_ev_other_err
, rx_ev_pause_frm
;
881 unsigned rx_ev_ip_frag_err
, rx_ev_hdr_type
, rx_ev_mcast_pkt
;
884 rx_ev_hdr_type
= EFX_QWORD_FIELD(*event
, RX_EV_HDR_TYPE
);
885 rx_ev_mcast_pkt
= EFX_QWORD_FIELD(*event
, RX_EV_MCAST_PKT
);
886 rx_ev_tobe_disc
= EFX_QWORD_FIELD(*event
, RX_EV_TOBE_DISC
);
887 rx_ev_pkt_type
= EFX_QWORD_FIELD(*event
, RX_EV_PKT_TYPE
);
888 rx_ev_buf_owner_id_err
= EFX_QWORD_FIELD(*event
,
889 RX_EV_BUF_OWNER_ID_ERR
);
890 rx_ev_ip_frag_err
= EFX_QWORD_FIELD(*event
, RX_EV_IF_FRAG_ERR
);
891 rx_ev_ip_hdr_chksum_err
= EFX_QWORD_FIELD(*event
,
892 RX_EV_IP_HDR_CHKSUM_ERR
);
893 rx_ev_tcp_udp_chksum_err
= EFX_QWORD_FIELD(*event
,
894 RX_EV_TCP_UDP_CHKSUM_ERR
);
895 rx_ev_eth_crc_err
= EFX_QWORD_FIELD(*event
, RX_EV_ETH_CRC_ERR
);
896 rx_ev_frm_trunc
= EFX_QWORD_FIELD(*event
, RX_EV_FRM_TRUNC
);
897 rx_ev_drib_nib
= ((falcon_rev(efx
) >= FALCON_REV_B0
) ?
898 0 : EFX_QWORD_FIELD(*event
, RX_EV_DRIB_NIB
));
899 rx_ev_pause_frm
= EFX_QWORD_FIELD(*event
, RX_EV_PAUSE_FRM_ERR
);
901 /* Every error apart from tobe_disc and pause_frm */
902 rx_ev_other_err
= (rx_ev_drib_nib
| rx_ev_tcp_udp_chksum_err
|
903 rx_ev_buf_owner_id_err
| rx_ev_eth_crc_err
|
904 rx_ev_frm_trunc
| rx_ev_ip_hdr_chksum_err
);
906 snap
= (rx_ev_pkt_type
== RX_EV_PKT_TYPE_LLC_DECODE
) ||
907 (rx_ev_pkt_type
== RX_EV_PKT_TYPE_VLAN_LLC_DECODE
);
908 non_ip
= (rx_ev_hdr_type
== RX_EV_HDR_TYPE_NON_IP_DECODE
);
910 /* SFC bug 5475/8970: The Falcon XMAC incorrectly calculates the
911 * length field of an LLC frame, which sets TOBE_DISC. We could set
912 * PASS_LEN_ERR, but we want the MAC to filter out short frames (to
913 * protect the RX block).
915 * bug5475 - LLC/SNAP: Falcon identifies SNAP packets.
916 * bug8970 - LLC/noSNAP: Falcon does not provide an LLC flag.
917 * LLC can't encapsulate IP, so by definition
918 * these packets are NON_IP.
920 * Unicast mismatch will also cause TOBE_DISC, so the driver needs
923 if (EFX_WORKAROUND_5475(efx
) && rx_ev_tobe_disc
&& (snap
|| non_ip
)) {
924 /* If all the other flags are zero then we can state the
925 * entire packet is ok, which will flag to the kernel not
926 * to recalculate checksums.
928 if (!(non_ip
| rx_ev_other_err
| rx_ev_pause_frm
))
933 /* TOBE_DISC is set for unicast mismatch. But given that
934 * we can't trust TOBE_DISC here, we must validate the dest
935 * MAC address ourselves.
937 if (!rx_ev_mcast_pkt
&& !check_dest_mac(rx_queue
, event
))
941 /* Count errors that are not in MAC stats. */
943 ++rx_queue
->channel
->n_rx_frm_trunc
;
944 else if (rx_ev_tobe_disc
)
945 ++rx_queue
->channel
->n_rx_tobe_disc
;
946 else if (rx_ev_ip_hdr_chksum_err
)
947 ++rx_queue
->channel
->n_rx_ip_hdr_chksum_err
;
948 else if (rx_ev_tcp_udp_chksum_err
)
949 ++rx_queue
->channel
->n_rx_tcp_udp_chksum_err
;
950 if (rx_ev_ip_frag_err
)
951 ++rx_queue
->channel
->n_rx_ip_frag_err
;
953 /* The frame must be discarded if any of these are true. */
954 *discard
= (rx_ev_eth_crc_err
| rx_ev_frm_trunc
| rx_ev_drib_nib
|
955 rx_ev_tobe_disc
| rx_ev_pause_frm
);
957 /* TOBE_DISC is expected on unicast mismatches; don't print out an
958 * error message. FRM_TRUNC indicates RXDP dropped the packet due
959 * to a FIFO overflow.
961 #ifdef EFX_ENABLE_DEBUG
962 if (rx_ev_other_err
) {
963 EFX_INFO_RL(efx
, " RX queue %d unexpected RX event "
964 EFX_QWORD_FMT
"%s%s%s%s%s%s%s%s%s\n",
965 rx_queue
->queue
, EFX_QWORD_VAL(*event
),
966 rx_ev_buf_owner_id_err
? " [OWNER_ID_ERR]" : "",
967 rx_ev_ip_hdr_chksum_err
?
968 " [IP_HDR_CHKSUM_ERR]" : "",
969 rx_ev_tcp_udp_chksum_err
?
970 " [TCP_UDP_CHKSUM_ERR]" : "",
971 rx_ev_eth_crc_err
? " [ETH_CRC_ERR]" : "",
972 rx_ev_frm_trunc
? " [FRM_TRUNC]" : "",
973 rx_ev_drib_nib
? " [DRIB_NIB]" : "",
974 rx_ev_tobe_disc
? " [TOBE_DISC]" : "",
975 rx_ev_pause_frm
? " [PAUSE]" : "",
976 snap
? " [SNAP/LLC]" : "");
980 if (unlikely(rx_ev_eth_crc_err
&& EFX_WORKAROUND_10750(efx
) &&
981 efx
->phy_type
== PHY_TYPE_10XPRESS
))
982 tenxpress_crc_err(efx
);
985 /* Handle receive events that are not in-order. */
986 static void falcon_handle_rx_bad_index(struct efx_rx_queue
*rx_queue
,
989 struct efx_nic
*efx
= rx_queue
->efx
;
990 unsigned expected
, dropped
;
992 expected
= rx_queue
->removed_count
& FALCON_RXD_RING_MASK
;
993 dropped
= ((index
+ FALCON_RXD_RING_SIZE
- expected
) &
994 FALCON_RXD_RING_MASK
);
995 EFX_INFO(efx
, "dropped %d events (index=%d expected=%d)\n",
996 dropped
, index
, expected
);
998 efx_schedule_reset(efx
, EFX_WORKAROUND_5676(efx
) ?
999 RESET_TYPE_RX_RECOVERY
: RESET_TYPE_DISABLE
);
1002 /* Handle a packet received event
1004 * Falcon silicon gives a "discard" flag if it's a unicast packet with the
1005 * wrong destination address
1006 * Also "is multicast" and "matches multicast filter" flags can be used to
1007 * discard non-matching multicast packets.
1009 static inline int falcon_handle_rx_event(struct efx_channel
*channel
,
1010 const efx_qword_t
*event
)
1012 unsigned int rx_ev_q_label
, rx_ev_desc_ptr
, rx_ev_byte_cnt
;
1013 unsigned int rx_ev_pkt_ok
, rx_ev_hdr_type
, rx_ev_mcast_pkt
;
1014 unsigned expected_ptr
;
1015 int discard
= 0, checksummed
;
1016 struct efx_rx_queue
*rx_queue
;
1017 struct efx_nic
*efx
= channel
->efx
;
1019 /* Basic packet information */
1020 rx_ev_byte_cnt
= EFX_QWORD_FIELD(*event
, RX_EV_BYTE_CNT
);
1021 rx_ev_pkt_ok
= EFX_QWORD_FIELD(*event
, RX_EV_PKT_OK
);
1022 rx_ev_hdr_type
= EFX_QWORD_FIELD(*event
, RX_EV_HDR_TYPE
);
1023 WARN_ON(EFX_QWORD_FIELD(*event
, RX_EV_JUMBO_CONT
));
1024 WARN_ON(EFX_QWORD_FIELD(*event
, RX_EV_SOP
) != 1);
1026 rx_ev_q_label
= EFX_QWORD_FIELD(*event
, RX_EV_Q_LABEL
);
1027 rx_queue
= &efx
->rx_queue
[rx_ev_q_label
];
1029 rx_ev_desc_ptr
= EFX_QWORD_FIELD(*event
, RX_EV_DESC_PTR
);
1030 expected_ptr
= rx_queue
->removed_count
& FALCON_RXD_RING_MASK
;
1031 if (unlikely(rx_ev_desc_ptr
!= expected_ptr
)) {
1032 falcon_handle_rx_bad_index(rx_queue
, rx_ev_desc_ptr
);
1033 return rx_ev_q_label
;
1036 if (likely(rx_ev_pkt_ok
)) {
1037 /* If packet is marked as OK and packet type is TCP/IPv4 or
1038 * UDP/IPv4, then we can rely on the hardware checksum.
1040 checksummed
= RX_EV_HDR_TYPE_HAS_CHECKSUMS(rx_ev_hdr_type
);
1042 falcon_handle_rx_not_ok(rx_queue
, event
, &rx_ev_pkt_ok
,
1043 &discard
, rx_ev_byte_cnt
);
1047 /* Detect multicast packets that didn't match the filter */
1048 rx_ev_mcast_pkt
= EFX_QWORD_FIELD(*event
, RX_EV_MCAST_PKT
);
1049 if (rx_ev_mcast_pkt
) {
1050 unsigned int rx_ev_mcast_hash_match
=
1051 EFX_QWORD_FIELD(*event
, RX_EV_MCAST_HASH_MATCH
);
1053 if (unlikely(!rx_ev_mcast_hash_match
))
1057 /* Handle received packet */
1058 efx_rx_packet(rx_queue
, rx_ev_desc_ptr
, rx_ev_byte_cnt
,
1059 checksummed
, discard
);
1061 return rx_ev_q_label
;
1064 /* Global events are basically PHY events */
1065 static void falcon_handle_global_event(struct efx_channel
*channel
,
1068 struct efx_nic
*efx
= channel
->efx
;
1069 int is_phy_event
= 0, handled
= 0;
1071 /* Check for interrupt on either port. Some boards have a
1072 * single PHY wired to the interrupt line for port 1. */
1073 if (EFX_QWORD_FIELD(*event
, G_PHY0_INTR
) ||
1074 EFX_QWORD_FIELD(*event
, G_PHY1_INTR
) ||
1075 EFX_QWORD_FIELD(*event
, XG_PHY_INTR
))
1078 if ((falcon_rev(efx
) >= FALCON_REV_B0
) &&
1079 EFX_OWORD_FIELD(*event
, XG_MNT_INTR_B0
))
1083 efx
->phy_op
->clear_interrupt(efx
);
1084 queue_work(efx
->workqueue
, &efx
->reconfigure_work
);
1088 if (EFX_QWORD_FIELD_VER(efx
, *event
, RX_RECOVERY
)) {
1089 EFX_ERR(efx
, "channel %d seen global RX_RESET "
1090 "event. Resetting.\n", channel
->channel
);
1092 atomic_inc(&efx
->rx_reset
);
1093 efx_schedule_reset(efx
, EFX_WORKAROUND_6555(efx
) ?
1094 RESET_TYPE_RX_RECOVERY
: RESET_TYPE_DISABLE
);
1099 EFX_ERR(efx
, "channel %d unknown global event "
1100 EFX_QWORD_FMT
"\n", channel
->channel
,
1101 EFX_QWORD_VAL(*event
));
1104 static void falcon_handle_driver_event(struct efx_channel
*channel
,
1107 struct efx_nic
*efx
= channel
->efx
;
1108 unsigned int ev_sub_code
;
1109 unsigned int ev_sub_data
;
1111 ev_sub_code
= EFX_QWORD_FIELD(*event
, DRIVER_EV_SUB_CODE
);
1112 ev_sub_data
= EFX_QWORD_FIELD(*event
, DRIVER_EV_SUB_DATA
);
1114 switch (ev_sub_code
) {
1115 case TX_DESCQ_FLS_DONE_EV_DECODE
:
1116 EFX_TRACE(efx
, "channel %d TXQ %d flushed\n",
1117 channel
->channel
, ev_sub_data
);
1119 case RX_DESCQ_FLS_DONE_EV_DECODE
:
1120 EFX_TRACE(efx
, "channel %d RXQ %d flushed\n",
1121 channel
->channel
, ev_sub_data
);
1123 case EVQ_INIT_DONE_EV_DECODE
:
1124 EFX_LOG(efx
, "channel %d EVQ %d initialised\n",
1125 channel
->channel
, ev_sub_data
);
1127 case SRM_UPD_DONE_EV_DECODE
:
1128 EFX_TRACE(efx
, "channel %d SRAM update done\n",
1131 case WAKE_UP_EV_DECODE
:
1132 EFX_TRACE(efx
, "channel %d RXQ %d wakeup event\n",
1133 channel
->channel
, ev_sub_data
);
1135 case TIMER_EV_DECODE
:
1136 EFX_TRACE(efx
, "channel %d RX queue %d timer expired\n",
1137 channel
->channel
, ev_sub_data
);
1139 case RX_RECOVERY_EV_DECODE
:
1140 EFX_ERR(efx
, "channel %d seen DRIVER RX_RESET event. "
1141 "Resetting.\n", channel
->channel
);
1142 atomic_inc(&efx
->rx_reset
);
1143 efx_schedule_reset(efx
,
1144 EFX_WORKAROUND_6555(efx
) ?
1145 RESET_TYPE_RX_RECOVERY
:
1146 RESET_TYPE_DISABLE
);
1148 case RX_DSC_ERROR_EV_DECODE
:
1149 EFX_ERR(efx
, "RX DMA Q %d reports descriptor fetch error."
1150 " RX Q %d is disabled.\n", ev_sub_data
, ev_sub_data
);
1151 efx_schedule_reset(efx
, RESET_TYPE_RX_DESC_FETCH
);
1153 case TX_DSC_ERROR_EV_DECODE
:
1154 EFX_ERR(efx
, "TX DMA Q %d reports descriptor fetch error."
1155 " TX Q %d is disabled.\n", ev_sub_data
, ev_sub_data
);
1156 efx_schedule_reset(efx
, RESET_TYPE_TX_DESC_FETCH
);
1159 EFX_TRACE(efx
, "channel %d unknown driver event code %d "
1160 "data %04x\n", channel
->channel
, ev_sub_code
,
1166 int falcon_process_eventq(struct efx_channel
*channel
, int *rx_quota
)
1168 unsigned int read_ptr
;
1169 efx_qword_t event
, *p_event
;
1174 read_ptr
= channel
->eventq_read_ptr
;
1177 p_event
= falcon_event(channel
, read_ptr
);
1180 if (!falcon_event_present(&event
))
1184 EFX_TRACE(channel
->efx
, "channel %d event is "EFX_QWORD_FMT
"\n",
1185 channel
->channel
, EFX_QWORD_VAL(event
));
1187 /* Clear this event by marking it all ones */
1188 EFX_SET_QWORD(*p_event
);
1190 ev_code
= EFX_QWORD_FIELD(event
, EV_CODE
);
1193 case RX_IP_EV_DECODE
:
1194 rxq
= falcon_handle_rx_event(channel
, &event
);
1195 rxdmaqs
|= (1 << rxq
);
1198 case TX_IP_EV_DECODE
:
1199 falcon_handle_tx_event(channel
, &event
);
1201 case DRV_GEN_EV_DECODE
:
1202 channel
->eventq_magic
1203 = EFX_QWORD_FIELD(event
, EVQ_MAGIC
);
1204 EFX_LOG(channel
->efx
, "channel %d received generated "
1205 "event "EFX_QWORD_FMT
"\n", channel
->channel
,
1206 EFX_QWORD_VAL(event
));
1208 case GLOBAL_EV_DECODE
:
1209 falcon_handle_global_event(channel
, &event
);
1211 case DRIVER_EV_DECODE
:
1212 falcon_handle_driver_event(channel
, &event
);
1215 EFX_ERR(channel
->efx
, "channel %d unknown event type %d"
1216 " (data " EFX_QWORD_FMT
")\n", channel
->channel
,
1217 ev_code
, EFX_QWORD_VAL(event
));
1220 /* Increment read pointer */
1221 read_ptr
= (read_ptr
+ 1) & FALCON_EVQ_MASK
;
1223 } while (*rx_quota
);
1225 channel
->eventq_read_ptr
= read_ptr
;
1229 void falcon_set_int_moderation(struct efx_channel
*channel
)
1231 efx_dword_t timer_cmd
;
1232 struct efx_nic
*efx
= channel
->efx
;
1234 /* Set timer register */
1235 if (channel
->irq_moderation
) {
1236 /* Round to resolution supported by hardware. The value we
1237 * program is based at 0. So actual interrupt moderation
1238 * achieved is ((x + 1) * res).
1240 unsigned int res
= 5;
1241 channel
->irq_moderation
-= (channel
->irq_moderation
% res
);
1242 if (channel
->irq_moderation
< res
)
1243 channel
->irq_moderation
= res
;
1244 EFX_POPULATE_DWORD_2(timer_cmd
,
1245 TIMER_MODE
, TIMER_MODE_INT_HLDOFF
,
1247 (channel
->irq_moderation
/ res
) - 1);
1249 EFX_POPULATE_DWORD_2(timer_cmd
,
1250 TIMER_MODE
, TIMER_MODE_DIS
,
1253 falcon_writel_page_locked(efx
, &timer_cmd
, TIMER_CMD_REG_KER
,
1258 /* Allocate buffer table entries for event queue */
1259 int falcon_probe_eventq(struct efx_channel
*channel
)
1261 struct efx_nic
*efx
= channel
->efx
;
1262 unsigned int evq_size
;
1264 evq_size
= FALCON_EVQ_SIZE
* sizeof(efx_qword_t
);
1265 return falcon_alloc_special_buffer(efx
, &channel
->eventq
, evq_size
);
1268 int falcon_init_eventq(struct efx_channel
*channel
)
1270 efx_oword_t evq_ptr
;
1271 struct efx_nic
*efx
= channel
->efx
;
1274 EFX_LOG(efx
, "channel %d event queue in special buffers %d-%d\n",
1275 channel
->channel
, channel
->eventq
.index
,
1276 channel
->eventq
.index
+ channel
->eventq
.entries
- 1);
1278 /* Pin event queue buffer */
1279 rc
= falcon_init_special_buffer(efx
, &channel
->eventq
);
1283 /* Fill event queue with all ones (i.e. empty events) */
1284 memset(channel
->eventq
.addr
, 0xff, channel
->eventq
.len
);
1286 /* Push event queue to card */
1287 EFX_POPULATE_OWORD_3(evq_ptr
,
1289 EVQ_SIZE
, FALCON_EVQ_ORDER
,
1290 EVQ_BUF_BASE_ID
, channel
->eventq
.index
);
1291 falcon_write_table(efx
, &evq_ptr
, efx
->type
->evq_ptr_tbl_base
,
1294 falcon_set_int_moderation(channel
);
1299 void falcon_fini_eventq(struct efx_channel
*channel
)
1301 efx_oword_t eventq_ptr
;
1302 struct efx_nic
*efx
= channel
->efx
;
1304 /* Remove event queue from card */
1305 EFX_ZERO_OWORD(eventq_ptr
);
1306 falcon_write_table(efx
, &eventq_ptr
, efx
->type
->evq_ptr_tbl_base
,
1309 /* Unpin event queue */
1310 falcon_fini_special_buffer(efx
, &channel
->eventq
);
1313 /* Free buffers backing event queue */
1314 void falcon_remove_eventq(struct efx_channel
*channel
)
1316 falcon_free_special_buffer(channel
->efx
, &channel
->eventq
);
1320 /* Generates a test event on the event queue. A subsequent call to
1321 * process_eventq() should pick up the event and place the value of
1322 * "magic" into channel->eventq_magic;
1324 void falcon_generate_test_event(struct efx_channel
*channel
, unsigned int magic
)
1326 efx_qword_t test_event
;
1328 EFX_POPULATE_QWORD_2(test_event
,
1329 EV_CODE
, DRV_GEN_EV_DECODE
,
1331 falcon_generate_event(channel
, &test_event
);
1335 /**************************************************************************
1337 * Falcon hardware interrupts
1338 * The hardware interrupt handler does very little work; all the event
1339 * queue processing is carried out by per-channel tasklets.
1341 **************************************************************************/
1343 /* Enable/disable/generate Falcon interrupts */
1344 static inline void falcon_interrupts(struct efx_nic
*efx
, int enabled
,
1347 efx_oword_t int_en_reg_ker
;
1349 EFX_POPULATE_OWORD_2(int_en_reg_ker
,
1351 DRV_INT_EN_KER
, enabled
);
1352 falcon_write(efx
, &int_en_reg_ker
, INT_EN_REG_KER
);
1355 void falcon_enable_interrupts(struct efx_nic
*efx
)
1357 efx_oword_t int_adr_reg_ker
;
1358 struct efx_channel
*channel
;
1360 EFX_ZERO_OWORD(*((efx_oword_t
*) efx
->irq_status
.addr
));
1361 wmb(); /* Ensure interrupt vector is clear before interrupts enabled */
1363 /* Program address */
1364 EFX_POPULATE_OWORD_2(int_adr_reg_ker
,
1365 NORM_INT_VEC_DIS_KER
, EFX_INT_MODE_USE_MSI(efx
),
1366 INT_ADR_KER
, efx
->irq_status
.dma_addr
);
1367 falcon_write(efx
, &int_adr_reg_ker
, INT_ADR_REG_KER
);
1369 /* Enable interrupts */
1370 falcon_interrupts(efx
, 1, 0);
1372 /* Force processing of all the channels to get the EVQ RPTRs up to
1374 efx_for_each_channel_with_interrupt(channel
, efx
)
1375 efx_schedule_channel(channel
);
1378 void falcon_disable_interrupts(struct efx_nic
*efx
)
1380 /* Disable interrupts */
1381 falcon_interrupts(efx
, 0, 0);
1384 /* Generate a Falcon test interrupt
1385 * Interrupt must already have been enabled, otherwise nasty things
1388 void falcon_generate_interrupt(struct efx_nic
*efx
)
1390 falcon_interrupts(efx
, 1, 1);
1393 /* Acknowledge a legacy interrupt from Falcon
1395 * This acknowledges a legacy (not MSI) interrupt via INT_ACK_KER_REG.
1397 * Due to SFC bug 3706 (silicon revision <=A1) reads can be duplicated in the
1398 * BIU. Interrupt acknowledge is read sensitive so must write instead
1399 * (then read to ensure the BIU collector is flushed)
1401 * NB most hardware supports MSI interrupts
1403 static inline void falcon_irq_ack_a1(struct efx_nic
*efx
)
1407 EFX_POPULATE_DWORD_1(reg
, INT_ACK_DUMMY_DATA
, 0xb7eb7e);
1408 falcon_writel(efx
, ®
, INT_ACK_REG_KER_A1
);
1409 falcon_readl(efx
, ®
, WORK_AROUND_BROKEN_PCI_READS_REG_KER_A1
);
1412 /* Process a fatal interrupt
1413 * Disable bus mastering ASAP and schedule a reset
1415 static irqreturn_t
falcon_fatal_interrupt(struct efx_nic
*efx
)
1417 struct falcon_nic_data
*nic_data
= efx
->nic_data
;
1418 efx_oword_t
*int_ker
= efx
->irq_status
.addr
;
1419 efx_oword_t fatal_intr
;
1420 int error
, mem_perr
;
1421 static int n_int_errors
;
1423 falcon_read(efx
, &fatal_intr
, FATAL_INTR_REG_KER
);
1424 error
= EFX_OWORD_FIELD(fatal_intr
, INT_KER_ERROR
);
1426 EFX_ERR(efx
, "SYSTEM ERROR " EFX_OWORD_FMT
" status "
1427 EFX_OWORD_FMT
": %s\n", EFX_OWORD_VAL(*int_ker
),
1428 EFX_OWORD_VAL(fatal_intr
),
1429 error
? "disabling bus mastering" : "no recognised error");
1433 /* If this is a memory parity error dump which blocks are offending */
1434 mem_perr
= EFX_OWORD_FIELD(fatal_intr
, MEM_PERR_INT_KER
);
1437 falcon_read(efx
, ®
, MEM_STAT_REG_KER
);
1438 EFX_ERR(efx
, "SYSTEM ERROR: memory parity error "
1439 EFX_OWORD_FMT
"\n", EFX_OWORD_VAL(reg
));
1442 /* Disable DMA bus mastering on both devices */
1443 pci_disable_device(efx
->pci_dev
);
1444 if (FALCON_IS_DUAL_FUNC(efx
))
1445 pci_disable_device(nic_data
->pci_dev2
);
1447 if (++n_int_errors
< FALCON_MAX_INT_ERRORS
) {
1448 EFX_ERR(efx
, "SYSTEM ERROR - reset scheduled\n");
1449 efx_schedule_reset(efx
, RESET_TYPE_INT_ERROR
);
1451 EFX_ERR(efx
, "SYSTEM ERROR - max number of errors seen."
1452 "NIC will be disabled\n");
1453 efx_schedule_reset(efx
, RESET_TYPE_DISABLE
);
1459 /* Handle a legacy interrupt from Falcon
1460 * Acknowledges the interrupt and schedule event queue processing.
1462 static irqreturn_t
falcon_legacy_interrupt_b0(int irq
, void *dev_id
)
1464 struct efx_nic
*efx
= dev_id
;
1465 efx_oword_t
*int_ker
= efx
->irq_status
.addr
;
1466 struct efx_channel
*channel
;
1471 /* Read the ISR which also ACKs the interrupts */
1472 falcon_readl(efx
, ®
, INT_ISR0_B0
);
1473 queues
= EFX_EXTRACT_DWORD(reg
, 0, 31);
1475 /* Check to see if we have a serious error condition */
1476 syserr
= EFX_OWORD_FIELD(*int_ker
, FATAL_INT
);
1477 if (unlikely(syserr
))
1478 return falcon_fatal_interrupt(efx
);
1483 efx
->last_irq_cpu
= raw_smp_processor_id();
1484 EFX_TRACE(efx
, "IRQ %d on CPU %d status " EFX_DWORD_FMT
"\n",
1485 irq
, raw_smp_processor_id(), EFX_DWORD_VAL(reg
));
1487 /* Schedule processing of any interrupting queues */
1488 channel
= &efx
->channel
[0];
1491 efx_schedule_channel(channel
);
1500 static irqreturn_t
falcon_legacy_interrupt_a1(int irq
, void *dev_id
)
1502 struct efx_nic
*efx
= dev_id
;
1503 efx_oword_t
*int_ker
= efx
->irq_status
.addr
;
1504 struct efx_channel
*channel
;
1508 /* Check to see if this is our interrupt. If it isn't, we
1509 * exit without having touched the hardware.
1511 if (unlikely(EFX_OWORD_IS_ZERO(*int_ker
))) {
1512 EFX_TRACE(efx
, "IRQ %d on CPU %d not for me\n", irq
,
1513 raw_smp_processor_id());
1516 efx
->last_irq_cpu
= raw_smp_processor_id();
1517 EFX_TRACE(efx
, "IRQ %d on CPU %d status " EFX_OWORD_FMT
"\n",
1518 irq
, raw_smp_processor_id(), EFX_OWORD_VAL(*int_ker
));
1520 /* Check to see if we have a serious error condition */
1521 syserr
= EFX_OWORD_FIELD(*int_ker
, FATAL_INT
);
1522 if (unlikely(syserr
))
1523 return falcon_fatal_interrupt(efx
);
1525 /* Determine interrupting queues, clear interrupt status
1526 * register and acknowledge the device interrupt.
1528 BUILD_BUG_ON(INT_EVQS_WIDTH
> EFX_MAX_CHANNELS
);
1529 queues
= EFX_OWORD_FIELD(*int_ker
, INT_EVQS
);
1530 EFX_ZERO_OWORD(*int_ker
);
1531 wmb(); /* Ensure the vector is cleared before interrupt ack */
1532 falcon_irq_ack_a1(efx
);
1534 /* Schedule processing of any interrupting queues */
1535 channel
= &efx
->channel
[0];
1538 efx_schedule_channel(channel
);
1546 /* Handle an MSI interrupt from Falcon
1548 * Handle an MSI hardware interrupt. This routine schedules event
1549 * queue processing. No interrupt acknowledgement cycle is necessary.
1550 * Also, we never need to check that the interrupt is for us, since
1551 * MSI interrupts cannot be shared.
1553 static irqreturn_t
falcon_msi_interrupt(int irq
, void *dev_id
)
1555 struct efx_channel
*channel
= dev_id
;
1556 struct efx_nic
*efx
= channel
->efx
;
1557 efx_oword_t
*int_ker
= efx
->irq_status
.addr
;
1560 efx
->last_irq_cpu
= raw_smp_processor_id();
1561 EFX_TRACE(efx
, "IRQ %d on CPU %d status " EFX_OWORD_FMT
"\n",
1562 irq
, raw_smp_processor_id(), EFX_OWORD_VAL(*int_ker
));
1564 /* Check to see if we have a serious error condition */
1565 syserr
= EFX_OWORD_FIELD(*int_ker
, FATAL_INT
);
1566 if (unlikely(syserr
))
1567 return falcon_fatal_interrupt(efx
);
1569 /* Schedule processing of the channel */
1570 efx_schedule_channel(channel
);
1576 /* Setup RSS indirection table.
1577 * This maps from the hash value of the packet to RXQ
1579 static void falcon_setup_rss_indir_table(struct efx_nic
*efx
)
1582 unsigned long offset
;
1585 if (falcon_rev(efx
) < FALCON_REV_B0
)
1588 for (offset
= RX_RSS_INDIR_TBL_B0
;
1589 offset
< RX_RSS_INDIR_TBL_B0
+ 0x800;
1591 EFX_POPULATE_DWORD_1(dword
, RX_RSS_INDIR_ENT_B0
,
1592 i
% efx
->rss_queues
);
1593 falcon_writel(efx
, &dword
, offset
);
1598 /* Hook interrupt handler(s)
1599 * Try MSI and then legacy interrupts.
1601 int falcon_init_interrupt(struct efx_nic
*efx
)
1603 struct efx_channel
*channel
;
1606 if (!EFX_INT_MODE_USE_MSI(efx
)) {
1607 irq_handler_t handler
;
1608 if (falcon_rev(efx
) >= FALCON_REV_B0
)
1609 handler
= falcon_legacy_interrupt_b0
;
1611 handler
= falcon_legacy_interrupt_a1
;
1613 rc
= request_irq(efx
->legacy_irq
, handler
, IRQF_SHARED
,
1616 EFX_ERR(efx
, "failed to hook legacy IRQ %d\n",
1623 /* Hook MSI or MSI-X interrupt */
1624 efx_for_each_channel_with_interrupt(channel
, efx
) {
1625 rc
= request_irq(channel
->irq
, falcon_msi_interrupt
,
1626 IRQF_PROBE_SHARED
, /* Not shared */
1627 efx
->name
, channel
);
1629 EFX_ERR(efx
, "failed to hook IRQ %d\n", channel
->irq
);
1637 efx_for_each_channel_with_interrupt(channel
, efx
)
1638 free_irq(channel
->irq
, channel
);
1643 void falcon_fini_interrupt(struct efx_nic
*efx
)
1645 struct efx_channel
*channel
;
1648 /* Disable MSI/MSI-X interrupts */
1649 efx_for_each_channel_with_interrupt(channel
, efx
) {
1651 free_irq(channel
->irq
, channel
);
1654 /* ACK legacy interrupt */
1655 if (falcon_rev(efx
) >= FALCON_REV_B0
)
1656 falcon_read(efx
, ®
, INT_ISR0_B0
);
1658 falcon_irq_ack_a1(efx
);
1660 /* Disable legacy interrupt */
1661 if (efx
->legacy_irq
)
1662 free_irq(efx
->legacy_irq
, efx
);
1665 /**************************************************************************
1669 **************************************************************************
1672 #define FALCON_SPI_MAX_LEN sizeof(efx_oword_t)
1674 /* Wait for SPI command completion */
1675 static int falcon_spi_wait(struct efx_nic
*efx
)
1678 int cmd_en
, timer_active
;
1683 falcon_read(efx
, ®
, EE_SPI_HCMD_REG_KER
);
1684 cmd_en
= EFX_OWORD_FIELD(reg
, EE_SPI_HCMD_CMD_EN
);
1685 timer_active
= EFX_OWORD_FIELD(reg
, EE_WR_TIMER_ACTIVE
);
1686 if (!cmd_en
&& !timer_active
)
1689 } while (++count
< 10000); /* wait upto 100msec */
1690 EFX_ERR(efx
, "timed out waiting for SPI\n");
1695 falcon_spi_read(struct efx_nic
*efx
, int device_id
, unsigned int command
,
1696 unsigned int address
, unsigned int addr_len
,
1697 void *data
, unsigned int len
)
1702 BUG_ON(len
> FALCON_SPI_MAX_LEN
);
1704 /* Check SPI not currently being accessed */
1705 rc
= falcon_spi_wait(efx
);
1709 /* Program address register */
1710 EFX_POPULATE_OWORD_1(reg
, EE_SPI_HADR_ADR
, address
);
1711 falcon_write(efx
, ®
, EE_SPI_HADR_REG_KER
);
1713 /* Issue read command */
1714 EFX_POPULATE_OWORD_7(reg
,
1715 EE_SPI_HCMD_CMD_EN
, 1,
1716 EE_SPI_HCMD_SF_SEL
, device_id
,
1717 EE_SPI_HCMD_DABCNT
, len
,
1718 EE_SPI_HCMD_READ
, EE_SPI_READ
,
1719 EE_SPI_HCMD_DUBCNT
, 0,
1720 EE_SPI_HCMD_ADBCNT
, addr_len
,
1721 EE_SPI_HCMD_ENC
, command
);
1722 falcon_write(efx
, ®
, EE_SPI_HCMD_REG_KER
);
1724 /* Wait for read to complete */
1725 rc
= falcon_spi_wait(efx
);
1730 falcon_read(efx
, ®
, EE_SPI_HDATA_REG_KER
);
1731 memcpy(data
, ®
, len
);
1735 /**************************************************************************
1739 **************************************************************************
1741 void falcon_drain_tx_fifo(struct efx_nic
*efx
)
1746 if ((falcon_rev(efx
) < FALCON_REV_B0
) ||
1747 (efx
->loopback_mode
!= LOOPBACK_NONE
))
1750 falcon_read(efx
, &temp
, MAC0_CTRL_REG_KER
);
1751 /* There is no point in draining more than once */
1752 if (EFX_OWORD_FIELD(temp
, TXFIFO_DRAIN_EN_B0
))
1755 /* MAC stats will fail whilst the TX fifo is draining. Serialise
1756 * the drain sequence with the statistics fetch */
1757 spin_lock(&efx
->stats_lock
);
1759 EFX_SET_OWORD_FIELD(temp
, TXFIFO_DRAIN_EN_B0
, 1);
1760 falcon_write(efx
, &temp
, MAC0_CTRL_REG_KER
);
1762 /* Reset the MAC and EM block. */
1763 falcon_read(efx
, &temp
, GLB_CTL_REG_KER
);
1764 EFX_SET_OWORD_FIELD(temp
, RST_XGTX
, 1);
1765 EFX_SET_OWORD_FIELD(temp
, RST_XGRX
, 1);
1766 EFX_SET_OWORD_FIELD(temp
, RST_EM
, 1);
1767 falcon_write(efx
, &temp
, GLB_CTL_REG_KER
);
1771 falcon_read(efx
, &temp
, GLB_CTL_REG_KER
);
1772 if (!EFX_OWORD_FIELD(temp
, RST_XGTX
) &&
1773 !EFX_OWORD_FIELD(temp
, RST_XGRX
) &&
1774 !EFX_OWORD_FIELD(temp
, RST_EM
)) {
1775 EFX_LOG(efx
, "Completed MAC reset after %d loops\n",
1780 EFX_ERR(efx
, "MAC reset failed\n");
1787 spin_unlock(&efx
->stats_lock
);
1789 /* If we've reset the EM block and the link is up, then
1790 * we'll have to kick the XAUI link so the PHY can recover */
1791 if (efx
->link_up
&& EFX_WORKAROUND_5147(efx
))
1792 falcon_reset_xaui(efx
);
1795 void falcon_deconfigure_mac_wrapper(struct efx_nic
*efx
)
1799 if (falcon_rev(efx
) < FALCON_REV_B0
)
1802 /* Isolate the MAC -> RX */
1803 falcon_read(efx
, &temp
, RX_CFG_REG_KER
);
1804 EFX_SET_OWORD_FIELD(temp
, RX_INGR_EN_B0
, 0);
1805 falcon_write(efx
, &temp
, RX_CFG_REG_KER
);
1808 falcon_drain_tx_fifo(efx
);
1811 void falcon_reconfigure_mac_wrapper(struct efx_nic
*efx
)
1817 if (efx
->link_options
& GM_LPA_10000
)
1819 else if (efx
->link_options
& GM_LPA_1000
)
1821 else if (efx
->link_options
& GM_LPA_100
)
1825 /* MAC_LINK_STATUS controls MAC backpressure but doesn't work
1826 * as advertised. Disable to ensure packets are not
1827 * indefinitely held and TX queue can be flushed at any point
1828 * while the link is down. */
1829 EFX_POPULATE_OWORD_5(reg
,
1830 MAC_XOFF_VAL
, 0xffff /* max pause time */,
1832 MAC_UC_PROM
, efx
->promiscuous
,
1833 MAC_LINK_STATUS
, 1, /* always set */
1834 MAC_SPEED
, link_speed
);
1835 /* On B0, MAC backpressure can be disabled and packets get
1837 if (falcon_rev(efx
) >= FALCON_REV_B0
) {
1838 EFX_SET_OWORD_FIELD(reg
, TXFIFO_DRAIN_EN_B0
,
1842 falcon_write(efx
, ®
, MAC0_CTRL_REG_KER
);
1844 /* Restore the multicast hash registers. */
1845 falcon_set_multicast_hash(efx
);
1847 /* Transmission of pause frames when RX crosses the threshold is
1848 * covered by RX_XOFF_MAC_EN and XM_TX_CFG_REG:XM_FCNTL.
1849 * Action on receipt of pause frames is controller by XM_DIS_FCNTL */
1850 tx_fc
= (efx
->flow_control
& EFX_FC_TX
) ? 1 : 0;
1851 falcon_read(efx
, ®
, RX_CFG_REG_KER
);
1852 EFX_SET_OWORD_FIELD_VER(efx
, reg
, RX_XOFF_MAC_EN
, tx_fc
);
1854 /* Unisolate the MAC -> RX */
1855 if (falcon_rev(efx
) >= FALCON_REV_B0
)
1856 EFX_SET_OWORD_FIELD(reg
, RX_INGR_EN_B0
, 1);
1857 falcon_write(efx
, ®
, RX_CFG_REG_KER
);
1860 int falcon_dma_stats(struct efx_nic
*efx
, unsigned int done_offset
)
1866 if (disable_dma_stats
)
1869 /* Statistics fetch will fail if the MAC is in TX drain */
1870 if (falcon_rev(efx
) >= FALCON_REV_B0
) {
1872 falcon_read(efx
, &temp
, MAC0_CTRL_REG_KER
);
1873 if (EFX_OWORD_FIELD(temp
, TXFIFO_DRAIN_EN_B0
))
1877 dma_done
= (efx
->stats_buffer
.addr
+ done_offset
);
1878 *dma_done
= FALCON_STATS_NOT_DONE
;
1879 wmb(); /* ensure done flag is clear */
1881 /* Initiate DMA transfer of stats */
1882 EFX_POPULATE_OWORD_2(reg
,
1883 MAC_STAT_DMA_CMD
, 1,
1885 efx
->stats_buffer
.dma_addr
);
1886 falcon_write(efx
, ®
, MAC0_STAT_DMA_REG_KER
);
1888 /* Wait for transfer to complete */
1889 for (i
= 0; i
< 400; i
++) {
1890 if (*(volatile u32
*)dma_done
== FALCON_STATS_DONE
)
1895 EFX_ERR(efx
, "timed out waiting for statistics\n");
1899 /**************************************************************************
1901 * PHY access via GMII
1903 **************************************************************************
1906 /* Use the top bit of the MII PHY id to indicate the PHY type
1907 * (1G/10G), with the remaining bits as the actual PHY id.
1909 * This allows us to avoid leaking information from the mii_if_info
1910 * structure into other data structures.
1912 #define FALCON_PHY_ID_ID_WIDTH EFX_WIDTH(MD_PRT_DEV_ADR)
1913 #define FALCON_PHY_ID_ID_MASK ((1 << FALCON_PHY_ID_ID_WIDTH) - 1)
1914 #define FALCON_PHY_ID_WIDTH (FALCON_PHY_ID_ID_WIDTH + 1)
1915 #define FALCON_PHY_ID_MASK ((1 << FALCON_PHY_ID_WIDTH) - 1)
1916 #define FALCON_PHY_ID_10G (1 << (FALCON_PHY_ID_WIDTH - 1))
1919 /* Packing the clause 45 port and device fields into a single value */
1920 #define MD_PRT_ADR_COMP_LBN (MD_PRT_ADR_LBN - MD_DEV_ADR_LBN)
1921 #define MD_PRT_ADR_COMP_WIDTH MD_PRT_ADR_WIDTH
1922 #define MD_DEV_ADR_COMP_LBN 0
1923 #define MD_DEV_ADR_COMP_WIDTH MD_DEV_ADR_WIDTH
1926 /* Wait for GMII access to complete */
1927 static int falcon_gmii_wait(struct efx_nic
*efx
)
1929 efx_dword_t md_stat
;
1932 for (count
= 0; count
< 1000; count
++) { /* wait upto 10ms */
1933 falcon_readl(efx
, &md_stat
, MD_STAT_REG_KER
);
1934 if (EFX_DWORD_FIELD(md_stat
, MD_BSY
) == 0) {
1935 if (EFX_DWORD_FIELD(md_stat
, MD_LNFL
) != 0 ||
1936 EFX_DWORD_FIELD(md_stat
, MD_BSERR
) != 0) {
1937 EFX_ERR(efx
, "error from GMII access "
1939 EFX_DWORD_VAL(md_stat
));
1946 EFX_ERR(efx
, "timed out waiting for GMII\n");
1950 /* Writes a GMII register of a PHY connected to Falcon using MDIO. */
1951 static void falcon_mdio_write(struct net_device
*net_dev
, int phy_id
,
1952 int addr
, int value
)
1954 struct efx_nic
*efx
= net_dev
->priv
;
1955 unsigned int phy_id2
= phy_id
& FALCON_PHY_ID_ID_MASK
;
1958 /* The 'generic' prt/dev packing in mdio_10g.h is conveniently
1959 * chosen so that the only current user, Falcon, can take the
1960 * packed value and use them directly.
1961 * Fail to build if this assumption is broken.
1963 BUILD_BUG_ON(FALCON_PHY_ID_10G
!= MDIO45_XPRT_ID_IS10G
);
1964 BUILD_BUG_ON(FALCON_PHY_ID_ID_WIDTH
!= MDIO45_PRT_DEV_WIDTH
);
1965 BUILD_BUG_ON(MD_PRT_ADR_COMP_LBN
!= MDIO45_PRT_ID_COMP_LBN
);
1966 BUILD_BUG_ON(MD_DEV_ADR_COMP_LBN
!= MDIO45_DEV_ID_COMP_LBN
);
1968 if (phy_id2
== PHY_ADDR_INVALID
)
1971 /* See falcon_mdio_read for an explanation. */
1972 if (!(phy_id
& FALCON_PHY_ID_10G
)) {
1973 int mmd
= ffs(efx
->phy_op
->mmds
) - 1;
1974 EFX_TRACE(efx
, "Fixing erroneous clause22 write\n");
1975 phy_id2
= mdio_clause45_pack(phy_id2
, mmd
)
1976 & FALCON_PHY_ID_ID_MASK
;
1979 EFX_REGDUMP(efx
, "writing GMII %d register %02x with %04x\n", phy_id
,
1982 spin_lock_bh(&efx
->phy_lock
);
1984 /* Check MII not currently being accessed */
1985 if (falcon_gmii_wait(efx
) != 0)
1988 /* Write the address/ID register */
1989 EFX_POPULATE_OWORD_1(reg
, MD_PHY_ADR
, addr
);
1990 falcon_write(efx
, ®
, MD_PHY_ADR_REG_KER
);
1992 EFX_POPULATE_OWORD_1(reg
, MD_PRT_DEV_ADR
, phy_id2
);
1993 falcon_write(efx
, ®
, MD_ID_REG_KER
);
1996 EFX_POPULATE_OWORD_1(reg
, MD_TXD
, value
);
1997 falcon_write(efx
, ®
, MD_TXD_REG_KER
);
1999 EFX_POPULATE_OWORD_2(reg
,
2002 falcon_write(efx
, ®
, MD_CS_REG_KER
);
2004 /* Wait for data to be written */
2005 if (falcon_gmii_wait(efx
) != 0) {
2006 /* Abort the write operation */
2007 EFX_POPULATE_OWORD_2(reg
,
2010 falcon_write(efx
, ®
, MD_CS_REG_KER
);
2015 spin_unlock_bh(&efx
->phy_lock
);
2018 /* Reads a GMII register from a PHY connected to Falcon. If no value
2019 * could be read, -1 will be returned. */
2020 static int falcon_mdio_read(struct net_device
*net_dev
, int phy_id
, int addr
)
2022 struct efx_nic
*efx
= net_dev
->priv
;
2023 unsigned int phy_addr
= phy_id
& FALCON_PHY_ID_ID_MASK
;
2027 if (phy_addr
== PHY_ADDR_INVALID
)
2030 /* Our PHY code knows whether it needs to talk clause 22(1G) or 45(10G)
2031 * but the generic Linux code does not make any distinction or have
2032 * any state for this.
2033 * We spot the case where someone tried to talk 22 to a 45 PHY and
2034 * redirect the request to the lowest numbered MMD as a clause45
2035 * request. This is enough to allow simple queries like id and link
2036 * state to succeed. TODO: We may need to do more in future.
2038 if (!(phy_id
& FALCON_PHY_ID_10G
)) {
2039 int mmd
= ffs(efx
->phy_op
->mmds
) - 1;
2040 EFX_TRACE(efx
, "Fixing erroneous clause22 read\n");
2041 phy_addr
= mdio_clause45_pack(phy_addr
, mmd
)
2042 & FALCON_PHY_ID_ID_MASK
;
2045 spin_lock_bh(&efx
->phy_lock
);
2047 /* Check MII not currently being accessed */
2048 if (falcon_gmii_wait(efx
) != 0)
2051 EFX_POPULATE_OWORD_1(reg
, MD_PHY_ADR
, addr
);
2052 falcon_write(efx
, ®
, MD_PHY_ADR_REG_KER
);
2054 EFX_POPULATE_OWORD_1(reg
, MD_PRT_DEV_ADR
, phy_addr
);
2055 falcon_write(efx
, ®
, MD_ID_REG_KER
);
2057 /* Request data to be read */
2058 EFX_POPULATE_OWORD_2(reg
, MD_RDC
, 1, MD_GC
, 0);
2059 falcon_write(efx
, ®
, MD_CS_REG_KER
);
2061 /* Wait for data to become available */
2062 value
= falcon_gmii_wait(efx
);
2064 falcon_read(efx
, ®
, MD_RXD_REG_KER
);
2065 value
= EFX_OWORD_FIELD(reg
, MD_RXD
);
2066 EFX_REGDUMP(efx
, "read from GMII %d register %02x, got %04x\n",
2067 phy_id
, addr
, value
);
2069 /* Abort the read operation */
2070 EFX_POPULATE_OWORD_2(reg
,
2073 falcon_write(efx
, ®
, MD_CS_REG_KER
);
2075 EFX_LOG(efx
, "read from GMII 0x%x register %02x, got "
2076 "error %d\n", phy_id
, addr
, value
);
2080 spin_unlock_bh(&efx
->phy_lock
);
2085 static void falcon_init_mdio(struct mii_if_info
*gmii
)
2087 gmii
->mdio_read
= falcon_mdio_read
;
2088 gmii
->mdio_write
= falcon_mdio_write
;
2089 gmii
->phy_id_mask
= FALCON_PHY_ID_MASK
;
2090 gmii
->reg_num_mask
= ((1 << EFX_WIDTH(MD_PHY_ADR
)) - 1);
2093 static int falcon_probe_phy(struct efx_nic
*efx
)
2095 switch (efx
->phy_type
) {
2096 case PHY_TYPE_10XPRESS
:
2097 efx
->phy_op
= &falcon_tenxpress_phy_ops
;
2100 efx
->phy_op
= &falcon_xfp_phy_ops
;
2103 EFX_ERR(efx
, "Unknown PHY type %d\n",
2108 efx
->loopback_modes
= LOOPBACKS_10G_INTERNAL
| efx
->phy_op
->loopbacks
;
2112 /* This call is responsible for hooking in the MAC and PHY operations */
2113 int falcon_probe_port(struct efx_nic
*efx
)
2117 /* Hook in PHY operations table */
2118 rc
= falcon_probe_phy(efx
);
2122 /* Set up GMII structure for PHY */
2123 efx
->mii
.supports_gmii
= 1;
2124 falcon_init_mdio(&efx
->mii
);
2126 /* Hardware flow ctrl. FalconA RX FIFO too small for pause generation */
2127 if (falcon_rev(efx
) >= FALCON_REV_B0
)
2128 efx
->flow_control
= EFX_FC_RX
| EFX_FC_TX
;
2130 efx
->flow_control
= EFX_FC_RX
;
2132 /* Allocate buffer for stats */
2133 rc
= falcon_alloc_buffer(efx
, &efx
->stats_buffer
,
2134 FALCON_MAC_STATS_SIZE
);
2137 EFX_LOG(efx
, "stats buffer at %llx (virt %p phys %lx)\n",
2138 (unsigned long long)efx
->stats_buffer
.dma_addr
,
2139 efx
->stats_buffer
.addr
,
2140 virt_to_phys(efx
->stats_buffer
.addr
));
2145 void falcon_remove_port(struct efx_nic
*efx
)
2147 falcon_free_buffer(efx
, &efx
->stats_buffer
);
2150 /**************************************************************************
2152 * Multicast filtering
2154 **************************************************************************
2157 void falcon_set_multicast_hash(struct efx_nic
*efx
)
2159 union efx_multicast_hash
*mc_hash
= &efx
->multicast_hash
;
2161 /* Broadcast packets go through the multicast hash filter.
2162 * ether_crc_le() of the broadcast address is 0xbe2612ff
2163 * so we always add bit 0xff to the mask.
2165 set_bit_le(0xff, mc_hash
->byte
);
2167 falcon_write(efx
, &mc_hash
->oword
[0], MAC_MCAST_HASH_REG0_KER
);
2168 falcon_write(efx
, &mc_hash
->oword
[1], MAC_MCAST_HASH_REG1_KER
);
2171 /**************************************************************************
2175 **************************************************************************
2178 /* Resets NIC to known state. This routine must be called in process
2179 * context and is allowed to sleep. */
2180 int falcon_reset_hw(struct efx_nic
*efx
, enum reset_type method
)
2182 struct falcon_nic_data
*nic_data
= efx
->nic_data
;
2183 efx_oword_t glb_ctl_reg_ker
;
2186 EFX_LOG(efx
, "performing hardware reset (%d)\n", method
);
2188 /* Initiate device reset */
2189 if (method
== RESET_TYPE_WORLD
) {
2190 rc
= pci_save_state(efx
->pci_dev
);
2192 EFX_ERR(efx
, "failed to backup PCI state of primary "
2193 "function prior to hardware reset\n");
2196 if (FALCON_IS_DUAL_FUNC(efx
)) {
2197 rc
= pci_save_state(nic_data
->pci_dev2
);
2199 EFX_ERR(efx
, "failed to backup PCI state of "
2200 "secondary function prior to "
2201 "hardware reset\n");
2206 EFX_POPULATE_OWORD_2(glb_ctl_reg_ker
,
2207 EXT_PHY_RST_DUR
, 0x7,
2210 int reset_phy
= (method
== RESET_TYPE_INVISIBLE
?
2211 EXCLUDE_FROM_RESET
: 0);
2213 EFX_POPULATE_OWORD_7(glb_ctl_reg_ker
,
2214 EXT_PHY_RST_CTL
, reset_phy
,
2215 PCIE_CORE_RST_CTL
, EXCLUDE_FROM_RESET
,
2216 PCIE_NSTCK_RST_CTL
, EXCLUDE_FROM_RESET
,
2217 PCIE_SD_RST_CTL
, EXCLUDE_FROM_RESET
,
2218 EE_RST_CTL
, EXCLUDE_FROM_RESET
,
2219 EXT_PHY_RST_DUR
, 0x7 /* 10ms */,
2222 falcon_write(efx
, &glb_ctl_reg_ker
, GLB_CTL_REG_KER
);
2224 EFX_LOG(efx
, "waiting for hardware reset\n");
2225 schedule_timeout_uninterruptible(HZ
/ 20);
2227 /* Restore PCI configuration if needed */
2228 if (method
== RESET_TYPE_WORLD
) {
2229 if (FALCON_IS_DUAL_FUNC(efx
)) {
2230 rc
= pci_restore_state(nic_data
->pci_dev2
);
2232 EFX_ERR(efx
, "failed to restore PCI config for "
2233 "the secondary function\n");
2237 rc
= pci_restore_state(efx
->pci_dev
);
2239 EFX_ERR(efx
, "failed to restore PCI config for the "
2240 "primary function\n");
2243 EFX_LOG(efx
, "successfully restored PCI config\n");
2246 /* Assert that reset complete */
2247 falcon_read(efx
, &glb_ctl_reg_ker
, GLB_CTL_REG_KER
);
2248 if (EFX_OWORD_FIELD(glb_ctl_reg_ker
, SWRST
) != 0) {
2250 EFX_ERR(efx
, "timed out waiting for hardware reset\n");
2253 EFX_LOG(efx
, "hardware reset complete\n");
2257 /* pci_save_state() and pci_restore_state() MUST be called in pairs */
2260 pci_restore_state(efx
->pci_dev
);
2267 /* Zeroes out the SRAM contents. This routine must be called in
2268 * process context and is allowed to sleep.
2270 static int falcon_reset_sram(struct efx_nic
*efx
)
2272 efx_oword_t srm_cfg_reg_ker
, gpio_cfg_reg_ker
;
2275 /* Set the SRAM wake/sleep GPIO appropriately. */
2276 falcon_read(efx
, &gpio_cfg_reg_ker
, GPIO_CTL_REG_KER
);
2277 EFX_SET_OWORD_FIELD(gpio_cfg_reg_ker
, GPIO1_OEN
, 1);
2278 EFX_SET_OWORD_FIELD(gpio_cfg_reg_ker
, GPIO1_OUT
, 1);
2279 falcon_write(efx
, &gpio_cfg_reg_ker
, GPIO_CTL_REG_KER
);
2281 /* Initiate SRAM reset */
2282 EFX_POPULATE_OWORD_2(srm_cfg_reg_ker
,
2283 SRAM_OOB_BT_INIT_EN
, 1,
2284 SRM_NUM_BANKS_AND_BANK_SIZE
, 0);
2285 falcon_write(efx
, &srm_cfg_reg_ker
, SRM_CFG_REG_KER
);
2287 /* Wait for SRAM reset to complete */
2290 EFX_LOG(efx
, "waiting for SRAM reset (attempt %d)...\n", count
);
2292 /* SRAM reset is slow; expect around 16ms */
2293 schedule_timeout_uninterruptible(HZ
/ 50);
2295 /* Check for reset complete */
2296 falcon_read(efx
, &srm_cfg_reg_ker
, SRM_CFG_REG_KER
);
2297 if (!EFX_OWORD_FIELD(srm_cfg_reg_ker
, SRAM_OOB_BT_INIT_EN
)) {
2298 EFX_LOG(efx
, "SRAM reset complete\n");
2302 } while (++count
< 20); /* wait upto 0.4 sec */
2304 EFX_ERR(efx
, "timed out waiting for SRAM reset\n");
2308 /* Extract non-volatile configuration */
2309 static int falcon_probe_nvconfig(struct efx_nic
*efx
)
2311 struct falcon_nvconfig
*nvconfig
;
2312 efx_oword_t nic_stat
;
2316 int magic_num
, struct_ver
, board_rev
;
2319 /* Find the boot device. */
2320 falcon_read(efx
, &nic_stat
, NIC_STAT_REG
);
2321 if (EFX_OWORD_FIELD(nic_stat
, SF_PRST
)) {
2322 device_id
= EE_SPI_FLASH
;
2324 } else if (EFX_OWORD_FIELD(nic_stat
, EE_PRST
)) {
2325 device_id
= EE_SPI_EEPROM
;
2331 nvconfig
= kmalloc(sizeof(*nvconfig
), GFP_KERNEL
);
2333 /* Read the whole configuration structure into memory. */
2334 for (offset
= 0; offset
< sizeof(*nvconfig
); offset
+= len
) {
2335 len
= min(sizeof(*nvconfig
) - offset
,
2336 (size_t) FALCON_SPI_MAX_LEN
);
2337 rc
= falcon_spi_read(efx
, device_id
, SPI_READ
,
2338 NVCONFIG_BASE
+ offset
, addr_len
,
2339 (char *)nvconfig
+ offset
, len
);
2344 /* Read the MAC addresses */
2345 memcpy(efx
->mac_address
, nvconfig
->mac_address
[0], ETH_ALEN
);
2347 /* Read the board configuration. */
2348 magic_num
= le16_to_cpu(nvconfig
->board_magic_num
);
2349 struct_ver
= le16_to_cpu(nvconfig
->board_struct_ver
);
2351 if (magic_num
!= NVCONFIG_BOARD_MAGIC_NUM
|| struct_ver
< 2) {
2352 EFX_ERR(efx
, "Non volatile memory bad magic=%x ver=%x "
2353 "therefore using defaults\n", magic_num
, struct_ver
);
2354 efx
->phy_type
= PHY_TYPE_NONE
;
2355 efx
->mii
.phy_id
= PHY_ADDR_INVALID
;
2358 struct falcon_nvconfig_board_v2
*v2
= &nvconfig
->board_v2
;
2360 efx
->phy_type
= v2
->port0_phy_type
;
2361 efx
->mii
.phy_id
= v2
->port0_phy_addr
;
2362 board_rev
= le16_to_cpu(v2
->board_revision
);
2365 EFX_LOG(efx
, "PHY is %d phy_id %d\n", efx
->phy_type
, efx
->mii
.phy_id
);
2367 efx_set_board_info(efx
, board_rev
);
2374 /* Probe the NIC variant (revision, ASIC vs FPGA, function count, port
2375 * count, port speed). Set workaround and feature flags accordingly.
2377 static int falcon_probe_nic_variant(struct efx_nic
*efx
)
2379 efx_oword_t altera_build
;
2381 falcon_read(efx
, &altera_build
, ALTERA_BUILD_REG_KER
);
2382 if (EFX_OWORD_FIELD(altera_build
, VER_ALL
)) {
2383 EFX_ERR(efx
, "Falcon FPGA not supported\n");
2387 switch (falcon_rev(efx
)) {
2390 EFX_ERR(efx
, "Falcon rev A0 not supported\n");
2393 case FALCON_REV_A1
:{
2394 efx_oword_t nic_stat
;
2396 falcon_read(efx
, &nic_stat
, NIC_STAT_REG
);
2398 if (EFX_OWORD_FIELD(nic_stat
, STRAP_PCIE
) == 0) {
2399 EFX_ERR(efx
, "Falcon rev A1 PCI-X not supported\n");
2402 if (!EFX_OWORD_FIELD(nic_stat
, STRAP_10G
)) {
2403 EFX_ERR(efx
, "1G mode not supported\n");
2413 EFX_ERR(efx
, "Unknown Falcon rev %d\n", falcon_rev(efx
));
2420 int falcon_probe_nic(struct efx_nic
*efx
)
2422 struct falcon_nic_data
*nic_data
;
2425 /* Allocate storage for hardware specific data */
2426 nic_data
= kzalloc(sizeof(*nic_data
), GFP_KERNEL
);
2427 efx
->nic_data
= nic_data
;
2429 /* Determine number of ports etc. */
2430 rc
= falcon_probe_nic_variant(efx
);
2434 /* Probe secondary function if expected */
2435 if (FALCON_IS_DUAL_FUNC(efx
)) {
2436 struct pci_dev
*dev
= pci_dev_get(efx
->pci_dev
);
2438 while ((dev
= pci_get_device(EFX_VENDID_SFC
, FALCON_A_S_DEVID
,
2440 if (dev
->bus
== efx
->pci_dev
->bus
&&
2441 dev
->devfn
== efx
->pci_dev
->devfn
+ 1) {
2442 nic_data
->pci_dev2
= dev
;
2446 if (!nic_data
->pci_dev2
) {
2447 EFX_ERR(efx
, "failed to find secondary function\n");
2453 /* Now we can reset the NIC */
2454 rc
= falcon_reset_hw(efx
, RESET_TYPE_ALL
);
2456 EFX_ERR(efx
, "failed to reset NIC\n");
2460 /* Allocate memory for INT_KER */
2461 rc
= falcon_alloc_buffer(efx
, &efx
->irq_status
, sizeof(efx_oword_t
));
2464 BUG_ON(efx
->irq_status
.dma_addr
& 0x0f);
2466 EFX_LOG(efx
, "INT_KER at %llx (virt %p phys %lx)\n",
2467 (unsigned long long)efx
->irq_status
.dma_addr
,
2468 efx
->irq_status
.addr
, virt_to_phys(efx
->irq_status
.addr
));
2470 /* Read in the non-volatile configuration */
2471 rc
= falcon_probe_nvconfig(efx
);
2475 /* Initialise I2C adapter */
2476 efx
->i2c_adap
.owner
= THIS_MODULE
;
2477 nic_data
->i2c_data
= falcon_i2c_bit_operations
;
2478 nic_data
->i2c_data
.data
= efx
;
2479 efx
->i2c_adap
.algo_data
= &nic_data
->i2c_data
;
2480 efx
->i2c_adap
.dev
.parent
= &efx
->pci_dev
->dev
;
2481 strlcpy(efx
->i2c_adap
.name
, "SFC4000 GPIO", sizeof(efx
->i2c_adap
.name
));
2482 rc
= i2c_bit_add_bus(&efx
->i2c_adap
);
2489 falcon_free_buffer(efx
, &efx
->irq_status
);
2492 if (nic_data
->pci_dev2
) {
2493 pci_dev_put(nic_data
->pci_dev2
);
2494 nic_data
->pci_dev2
= NULL
;
2498 kfree(efx
->nic_data
);
2502 /* This call performs hardware-specific global initialisation, such as
2503 * defining the descriptor cache sizes and number of RSS channels.
2504 * It does not set up any buffers, descriptor rings or event queues.
2506 int falcon_init_nic(struct efx_nic
*efx
)
2512 /* Set up the address region register. This is only needed
2513 * for the B0 FPGA, but since we are just pushing in the
2514 * reset defaults this may as well be unconditional. */
2515 EFX_POPULATE_OWORD_4(temp
, ADR_REGION0
, 0,
2516 ADR_REGION1
, (1 << 16),
2517 ADR_REGION2
, (2 << 16),
2518 ADR_REGION3
, (3 << 16));
2519 falcon_write(efx
, &temp
, ADR_REGION_REG_KER
);
2521 /* Use on-chip SRAM */
2522 falcon_read(efx
, &temp
, NIC_STAT_REG
);
2523 EFX_SET_OWORD_FIELD(temp
, ONCHIP_SRAM
, 1);
2524 falcon_write(efx
, &temp
, NIC_STAT_REG
);
2526 /* Set buffer table mode */
2527 EFX_POPULATE_OWORD_1(temp
, BUF_TBL_MODE
, BUF_TBL_MODE_FULL
);
2528 falcon_write(efx
, &temp
, BUF_TBL_CFG_REG_KER
);
2530 rc
= falcon_reset_sram(efx
);
2534 /* Set positions of descriptor caches in SRAM. */
2535 EFX_POPULATE_OWORD_1(temp
, SRM_TX_DC_BASE_ADR
, TX_DC_BASE
/ 8);
2536 falcon_write(efx
, &temp
, SRM_TX_DC_CFG_REG_KER
);
2537 EFX_POPULATE_OWORD_1(temp
, SRM_RX_DC_BASE_ADR
, RX_DC_BASE
/ 8);
2538 falcon_write(efx
, &temp
, SRM_RX_DC_CFG_REG_KER
);
2540 /* Set TX descriptor cache size. */
2541 BUILD_BUG_ON(TX_DC_ENTRIES
!= (16 << TX_DC_ENTRIES_ORDER
));
2542 EFX_POPULATE_OWORD_1(temp
, TX_DC_SIZE
, TX_DC_ENTRIES_ORDER
);
2543 falcon_write(efx
, &temp
, TX_DC_CFG_REG_KER
);
2545 /* Set RX descriptor cache size. Set low watermark to size-8, as
2546 * this allows most efficient prefetching.
2548 BUILD_BUG_ON(RX_DC_ENTRIES
!= (16 << RX_DC_ENTRIES_ORDER
));
2549 EFX_POPULATE_OWORD_1(temp
, RX_DC_SIZE
, RX_DC_ENTRIES_ORDER
);
2550 falcon_write(efx
, &temp
, RX_DC_CFG_REG_KER
);
2551 EFX_POPULATE_OWORD_1(temp
, RX_DC_PF_LWM
, RX_DC_ENTRIES
- 8);
2552 falcon_write(efx
, &temp
, RX_DC_PF_WM_REG_KER
);
2554 /* Clear the parity enables on the TX data fifos as
2555 * they produce false parity errors because of timing issues
2557 if (EFX_WORKAROUND_5129(efx
)) {
2558 falcon_read(efx
, &temp
, SPARE_REG_KER
);
2559 EFX_SET_OWORD_FIELD(temp
, MEM_PERR_EN_TX_DATA
, 0);
2560 falcon_write(efx
, &temp
, SPARE_REG_KER
);
2563 /* Enable all the genuinely fatal interrupts. (They are still
2564 * masked by the overall interrupt mask, controlled by
2565 * falcon_interrupts()).
2567 * Note: All other fatal interrupts are enabled
2569 EFX_POPULATE_OWORD_3(temp
,
2570 ILL_ADR_INT_KER_EN
, 1,
2571 RBUF_OWN_INT_KER_EN
, 1,
2572 TBUF_OWN_INT_KER_EN
, 1);
2573 EFX_INVERT_OWORD(temp
);
2574 falcon_write(efx
, &temp
, FATAL_INTR_REG_KER
);
2576 /* Set number of RSS queues for receive path. */
2577 falcon_read(efx
, &temp
, RX_FILTER_CTL_REG
);
2578 if (falcon_rev(efx
) >= FALCON_REV_B0
)
2579 EFX_SET_OWORD_FIELD(temp
, NUM_KER
, 0);
2581 EFX_SET_OWORD_FIELD(temp
, NUM_KER
, efx
->rss_queues
- 1);
2582 if (EFX_WORKAROUND_7244(efx
)) {
2583 EFX_SET_OWORD_FIELD(temp
, UDP_FULL_SRCH_LIMIT
, 8);
2584 EFX_SET_OWORD_FIELD(temp
, UDP_WILD_SRCH_LIMIT
, 8);
2585 EFX_SET_OWORD_FIELD(temp
, TCP_FULL_SRCH_LIMIT
, 8);
2586 EFX_SET_OWORD_FIELD(temp
, TCP_WILD_SRCH_LIMIT
, 8);
2588 falcon_write(efx
, &temp
, RX_FILTER_CTL_REG
);
2590 falcon_setup_rss_indir_table(efx
);
2592 /* Setup RX. Wait for descriptor is broken and must
2593 * be disabled. RXDP recovery shouldn't be needed, but is.
2595 falcon_read(efx
, &temp
, RX_SELF_RST_REG_KER
);
2596 EFX_SET_OWORD_FIELD(temp
, RX_NODESC_WAIT_DIS
, 1);
2597 EFX_SET_OWORD_FIELD(temp
, RX_RECOVERY_EN
, 1);
2598 if (EFX_WORKAROUND_5583(efx
))
2599 EFX_SET_OWORD_FIELD(temp
, RX_ISCSI_DIS
, 1);
2600 falcon_write(efx
, &temp
, RX_SELF_RST_REG_KER
);
2602 /* Disable the ugly timer-based TX DMA backoff and allow TX DMA to be
2603 * controlled by the RX FIFO fill level. Set arbitration to one pkt/Q.
2605 falcon_read(efx
, &temp
, TX_CFG2_REG_KER
);
2606 EFX_SET_OWORD_FIELD(temp
, TX_RX_SPACER
, 0xfe);
2607 EFX_SET_OWORD_FIELD(temp
, TX_RX_SPACER_EN
, 1);
2608 EFX_SET_OWORD_FIELD(temp
, TX_ONE_PKT_PER_Q
, 1);
2609 EFX_SET_OWORD_FIELD(temp
, TX_CSR_PUSH_EN
, 0);
2610 EFX_SET_OWORD_FIELD(temp
, TX_DIS_NON_IP_EV
, 1);
2611 /* Enable SW_EV to inherit in char driver - assume harmless here */
2612 EFX_SET_OWORD_FIELD(temp
, TX_SW_EV_EN
, 1);
2613 /* Prefetch threshold 2 => fetch when descriptor cache half empty */
2614 EFX_SET_OWORD_FIELD(temp
, TX_PREF_THRESHOLD
, 2);
2615 /* Squash TX of packets of 16 bytes or less */
2616 if (falcon_rev(efx
) >= FALCON_REV_B0
&& EFX_WORKAROUND_9141(efx
))
2617 EFX_SET_OWORD_FIELD(temp
, TX_FLUSH_MIN_LEN_EN_B0
, 1);
2618 falcon_write(efx
, &temp
, TX_CFG2_REG_KER
);
2620 /* Do not enable TX_NO_EOP_DISC_EN, since it limits packets to 16
2621 * descriptors (which is bad).
2623 falcon_read(efx
, &temp
, TX_CFG_REG_KER
);
2624 EFX_SET_OWORD_FIELD(temp
, TX_NO_EOP_DISC_EN
, 0);
2625 falcon_write(efx
, &temp
, TX_CFG_REG_KER
);
2628 falcon_read(efx
, &temp
, RX_CFG_REG_KER
);
2629 EFX_SET_OWORD_FIELD_VER(efx
, temp
, RX_DESC_PUSH_EN
, 0);
2630 if (EFX_WORKAROUND_7575(efx
))
2631 EFX_SET_OWORD_FIELD_VER(efx
, temp
, RX_USR_BUF_SIZE
,
2633 if (falcon_rev(efx
) >= FALCON_REV_B0
)
2634 EFX_SET_OWORD_FIELD(temp
, RX_INGR_EN_B0
, 1);
2636 /* RX FIFO flow control thresholds */
2637 thresh
= ((rx_xon_thresh_bytes
>= 0) ?
2638 rx_xon_thresh_bytes
: efx
->type
->rx_xon_thresh
);
2639 EFX_SET_OWORD_FIELD_VER(efx
, temp
, RX_XON_MAC_TH
, thresh
/ 256);
2640 thresh
= ((rx_xoff_thresh_bytes
>= 0) ?
2641 rx_xoff_thresh_bytes
: efx
->type
->rx_xoff_thresh
);
2642 EFX_SET_OWORD_FIELD_VER(efx
, temp
, RX_XOFF_MAC_TH
, thresh
/ 256);
2643 /* RX control FIFO thresholds [32 entries] */
2644 EFX_SET_OWORD_FIELD_VER(efx
, temp
, RX_XON_TX_TH
, 25);
2645 EFX_SET_OWORD_FIELD_VER(efx
, temp
, RX_XOFF_TX_TH
, 20);
2646 falcon_write(efx
, &temp
, RX_CFG_REG_KER
);
2648 /* Set destination of both TX and RX Flush events */
2649 if (falcon_rev(efx
) >= FALCON_REV_B0
) {
2650 EFX_POPULATE_OWORD_1(temp
, FLS_EVQ_ID
, 0);
2651 falcon_write(efx
, &temp
, DP_CTRL_REG
);
2657 void falcon_remove_nic(struct efx_nic
*efx
)
2659 struct falcon_nic_data
*nic_data
= efx
->nic_data
;
2662 rc
= i2c_del_adapter(&efx
->i2c_adap
);
2665 falcon_free_buffer(efx
, &efx
->irq_status
);
2667 falcon_reset_hw(efx
, RESET_TYPE_ALL
);
2669 /* Release the second function after the reset */
2670 if (nic_data
->pci_dev2
) {
2671 pci_dev_put(nic_data
->pci_dev2
);
2672 nic_data
->pci_dev2
= NULL
;
2675 /* Tear down the private nic state */
2676 kfree(efx
->nic_data
);
2677 efx
->nic_data
= NULL
;
2680 void falcon_update_nic_stats(struct efx_nic
*efx
)
2684 falcon_read(efx
, &cnt
, RX_NODESC_DROP_REG_KER
);
2685 efx
->n_rx_nodesc_drop_cnt
+= EFX_OWORD_FIELD(cnt
, RX_NODESC_DROP_CNT
);
2688 /**************************************************************************
2690 * Revision-dependent attributes used by efx.c
2692 **************************************************************************
2695 struct efx_nic_type falcon_a_nic_type
= {
2697 .mem_map_size
= 0x20000,
2698 .txd_ptr_tbl_base
= TX_DESC_PTR_TBL_KER_A1
,
2699 .rxd_ptr_tbl_base
= RX_DESC_PTR_TBL_KER_A1
,
2700 .buf_tbl_base
= BUF_TBL_KER_A1
,
2701 .evq_ptr_tbl_base
= EVQ_PTR_TBL_KER_A1
,
2702 .evq_rptr_tbl_base
= EVQ_RPTR_REG_KER_A1
,
2703 .txd_ring_mask
= FALCON_TXD_RING_MASK
,
2704 .rxd_ring_mask
= FALCON_RXD_RING_MASK
,
2705 .evq_size
= FALCON_EVQ_SIZE
,
2706 .max_dma_mask
= FALCON_DMA_MASK
,
2707 .tx_dma_mask
= FALCON_TX_DMA_MASK
,
2708 .bug5391_mask
= 0xf,
2709 .rx_xoff_thresh
= 2048,
2710 .rx_xon_thresh
= 512,
2711 .rx_buffer_padding
= 0x24,
2712 .max_interrupt_mode
= EFX_INT_MODE_MSI
,
2713 .phys_addr_channels
= 4,
2716 struct efx_nic_type falcon_b_nic_type
= {
2718 /* Map everything up to and including the RSS indirection
2719 * table. Don't map MSI-X table, MSI-X PBA since Linux
2720 * requires that they not be mapped. */
2721 .mem_map_size
= RX_RSS_INDIR_TBL_B0
+ 0x800,
2722 .txd_ptr_tbl_base
= TX_DESC_PTR_TBL_KER_B0
,
2723 .rxd_ptr_tbl_base
= RX_DESC_PTR_TBL_KER_B0
,
2724 .buf_tbl_base
= BUF_TBL_KER_B0
,
2725 .evq_ptr_tbl_base
= EVQ_PTR_TBL_KER_B0
,
2726 .evq_rptr_tbl_base
= EVQ_RPTR_REG_KER_B0
,
2727 .txd_ring_mask
= FALCON_TXD_RING_MASK
,
2728 .rxd_ring_mask
= FALCON_RXD_RING_MASK
,
2729 .evq_size
= FALCON_EVQ_SIZE
,
2730 .max_dma_mask
= FALCON_DMA_MASK
,
2731 .tx_dma_mask
= FALCON_TX_DMA_MASK
,
2733 .rx_xoff_thresh
= 54272, /* ~80Kb - 3*max MTU */
2734 .rx_xon_thresh
= 27648, /* ~3*max MTU */
2735 .rx_buffer_padding
= 0,
2736 .max_interrupt_mode
= EFX_INT_MODE_MSIX
,
2737 .phys_addr_channels
= 32, /* Hardware limit is 64, but the legacy
2738 * interrupt handler only supports 32