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8e730c15 BH |
1 | /**************************************************************************** |
2 | * Driver for Solarflare Solarstorm network controllers and boards | |
3 | * Copyright 2005-2006 Fen Systems Ltd. | |
0a6f40c6 | 4 | * Copyright 2006-2011 Solarflare Communications Inc. |
8e730c15 BH |
5 | * |
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. | |
9 | */ | |
10 | ||
11 | #include <linux/bitops.h> | |
12 | #include <linux/delay.h> | |
a6b7a407 | 13 | #include <linux/interrupt.h> |
8e730c15 BH |
14 | #include <linux/pci.h> |
15 | #include <linux/module.h> | |
16 | #include <linux/seq_file.h> | |
17 | #include "net_driver.h" | |
18 | #include "bitfield.h" | |
19 | #include "efx.h" | |
20 | #include "nic.h" | |
21 | #include "regs.h" | |
22 | #include "io.h" | |
23 | #include "workarounds.h" | |
24 | ||
25 | /************************************************************************** | |
26 | * | |
27 | * Configurable values | |
28 | * | |
29 | ************************************************************************** | |
30 | */ | |
31 | ||
32 | /* This is set to 16 for a good reason. In summary, if larger than | |
33 | * 16, the descriptor cache holds more than a default socket | |
34 | * buffer's worth of packets (for UDP we can only have at most one | |
35 | * socket buffer's worth outstanding). This combined with the fact | |
36 | * that we only get 1 TX event per descriptor cache means the NIC | |
37 | * goes idle. | |
38 | */ | |
39 | #define TX_DC_ENTRIES 16 | |
40 | #define TX_DC_ENTRIES_ORDER 1 | |
41 | ||
42 | #define RX_DC_ENTRIES 64 | |
43 | #define RX_DC_ENTRIES_ORDER 3 | |
44 | ||
8e730c15 BH |
45 | /* If EFX_MAX_INT_ERRORS internal errors occur within |
46 | * EFX_INT_ERROR_EXPIRE seconds, we consider the NIC broken and | |
47 | * disable it. | |
48 | */ | |
49 | #define EFX_INT_ERROR_EXPIRE 3600 | |
50 | #define EFX_MAX_INT_ERRORS 5 | |
51 | ||
8e730c15 BH |
52 | /* Depth of RX flush request fifo */ |
53 | #define EFX_RX_FLUSH_COUNT 4 | |
54 | ||
4ef594eb BH |
55 | /* Driver generated events */ |
56 | #define _EFX_CHANNEL_MAGIC_TEST 0x000101 | |
57 | #define _EFX_CHANNEL_MAGIC_FILL 0x000102 | |
9f2cb71c BH |
58 | #define _EFX_CHANNEL_MAGIC_RX_DRAIN 0x000103 |
59 | #define _EFX_CHANNEL_MAGIC_TX_DRAIN 0x000104 | |
d730dc52 | 60 | |
4ef594eb BH |
61 | #define _EFX_CHANNEL_MAGIC(_code, _data) ((_code) << 8 | (_data)) |
62 | #define _EFX_CHANNEL_MAGIC_CODE(_magic) ((_magic) >> 8) | |
63 | ||
64 | #define EFX_CHANNEL_MAGIC_TEST(_channel) \ | |
65 | _EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_TEST, (_channel)->channel) | |
2ae75dac BH |
66 | #define EFX_CHANNEL_MAGIC_FILL(_rx_queue) \ |
67 | _EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_FILL, \ | |
68 | efx_rx_queue_index(_rx_queue)) | |
9f2cb71c BH |
69 | #define EFX_CHANNEL_MAGIC_RX_DRAIN(_rx_queue) \ |
70 | _EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_RX_DRAIN, \ | |
71 | efx_rx_queue_index(_rx_queue)) | |
72 | #define EFX_CHANNEL_MAGIC_TX_DRAIN(_tx_queue) \ | |
73 | _EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_TX_DRAIN, \ | |
74 | (_tx_queue)->queue) | |
90d683af | 75 | |
525d9e82 DP |
76 | static void efx_magic_event(struct efx_channel *channel, u32 magic); |
77 | ||
8e730c15 BH |
78 | /************************************************************************** |
79 | * | |
80 | * Solarstorm hardware access | |
81 | * | |
82 | **************************************************************************/ | |
83 | ||
84 | static inline void efx_write_buf_tbl(struct efx_nic *efx, efx_qword_t *value, | |
85 | unsigned int index) | |
86 | { | |
87 | efx_sram_writeq(efx, efx->membase + efx->type->buf_tbl_base, | |
88 | value, index); | |
89 | } | |
90 | ||
91 | /* Read the current event from the event queue */ | |
92 | static inline efx_qword_t *efx_event(struct efx_channel *channel, | |
93 | unsigned int index) | |
94 | { | |
d4fabcc8 BH |
95 | return ((efx_qword_t *) (channel->eventq.addr)) + |
96 | (index & channel->eventq_mask); | |
8e730c15 BH |
97 | } |
98 | ||
99 | /* See if an event is present | |
100 | * | |
101 | * We check both the high and low dword of the event for all ones. We | |
102 | * wrote all ones when we cleared the event, and no valid event can | |
103 | * have all ones in either its high or low dwords. This approach is | |
104 | * robust against reordering. | |
105 | * | |
106 | * Note that using a single 64-bit comparison is incorrect; even | |
107 | * though the CPU read will be atomic, the DMA write may not be. | |
108 | */ | |
109 | static inline int efx_event_present(efx_qword_t *event) | |
110 | { | |
807540ba ED |
111 | return !(EFX_DWORD_IS_ALL_ONES(event->dword[0]) | |
112 | EFX_DWORD_IS_ALL_ONES(event->dword[1])); | |
8e730c15 BH |
113 | } |
114 | ||
115 | static bool efx_masked_compare_oword(const efx_oword_t *a, const efx_oword_t *b, | |
116 | const efx_oword_t *mask) | |
117 | { | |
118 | return ((a->u64[0] ^ b->u64[0]) & mask->u64[0]) || | |
119 | ((a->u64[1] ^ b->u64[1]) & mask->u64[1]); | |
120 | } | |
121 | ||
122 | int efx_nic_test_registers(struct efx_nic *efx, | |
123 | const struct efx_nic_register_test *regs, | |
124 | size_t n_regs) | |
125 | { | |
126 | unsigned address = 0, i, j; | |
127 | efx_oword_t mask, imask, original, reg, buf; | |
128 | ||
8e730c15 BH |
129 | for (i = 0; i < n_regs; ++i) { |
130 | address = regs[i].address; | |
131 | mask = imask = regs[i].mask; | |
132 | EFX_INVERT_OWORD(imask); | |
133 | ||
134 | efx_reado(efx, &original, address); | |
135 | ||
136 | /* bit sweep on and off */ | |
137 | for (j = 0; j < 128; j++) { | |
138 | if (!EFX_EXTRACT_OWORD32(mask, j, j)) | |
139 | continue; | |
140 | ||
141 | /* Test this testable bit can be set in isolation */ | |
142 | EFX_AND_OWORD(reg, original, mask); | |
143 | EFX_SET_OWORD32(reg, j, j, 1); | |
144 | ||
145 | efx_writeo(efx, ®, address); | |
146 | efx_reado(efx, &buf, address); | |
147 | ||
148 | if (efx_masked_compare_oword(®, &buf, &mask)) | |
149 | goto fail; | |
150 | ||
151 | /* Test this testable bit can be cleared in isolation */ | |
152 | EFX_OR_OWORD(reg, original, mask); | |
153 | EFX_SET_OWORD32(reg, j, j, 0); | |
154 | ||
155 | efx_writeo(efx, ®, address); | |
156 | efx_reado(efx, &buf, address); | |
157 | ||
158 | if (efx_masked_compare_oword(®, &buf, &mask)) | |
159 | goto fail; | |
160 | } | |
161 | ||
162 | efx_writeo(efx, &original, address); | |
163 | } | |
164 | ||
165 | return 0; | |
166 | ||
167 | fail: | |
62776d03 BH |
168 | netif_err(efx, hw, efx->net_dev, |
169 | "wrote "EFX_OWORD_FMT" read "EFX_OWORD_FMT | |
170 | " at address 0x%x mask "EFX_OWORD_FMT"\n", EFX_OWORD_VAL(reg), | |
171 | EFX_OWORD_VAL(buf), address, EFX_OWORD_VAL(mask)); | |
8e730c15 BH |
172 | return -EIO; |
173 | } | |
174 | ||
175 | /************************************************************************** | |
176 | * | |
177 | * Special buffer handling | |
178 | * Special buffers are used for event queues and the TX and RX | |
179 | * descriptor rings. | |
180 | * | |
181 | *************************************************************************/ | |
182 | ||
183 | /* | |
184 | * Initialise a special buffer | |
185 | * | |
186 | * This will define a buffer (previously allocated via | |
187 | * efx_alloc_special_buffer()) in the buffer table, allowing | |
188 | * it to be used for event queues, descriptor rings etc. | |
189 | */ | |
190 | static void | |
191 | efx_init_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer) | |
192 | { | |
193 | efx_qword_t buf_desc; | |
5bbe2f4f | 194 | unsigned int index; |
8e730c15 BH |
195 | dma_addr_t dma_addr; |
196 | int i; | |
197 | ||
198 | EFX_BUG_ON_PARANOID(!buffer->addr); | |
199 | ||
200 | /* Write buffer descriptors to NIC */ | |
201 | for (i = 0; i < buffer->entries; i++) { | |
202 | index = buffer->index + i; | |
5b6262d0 | 203 | dma_addr = buffer->dma_addr + (i * EFX_BUF_SIZE); |
62776d03 BH |
204 | netif_dbg(efx, probe, efx->net_dev, |
205 | "mapping special buffer %d at %llx\n", | |
206 | index, (unsigned long long)dma_addr); | |
8e730c15 BH |
207 | EFX_POPULATE_QWORD_3(buf_desc, |
208 | FRF_AZ_BUF_ADR_REGION, 0, | |
209 | FRF_AZ_BUF_ADR_FBUF, dma_addr >> 12, | |
210 | FRF_AZ_BUF_OWNER_ID_FBUF, 0); | |
211 | efx_write_buf_tbl(efx, &buf_desc, index); | |
212 | } | |
213 | } | |
214 | ||
215 | /* Unmaps a buffer and clears the buffer table entries */ | |
216 | static void | |
217 | efx_fini_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer) | |
218 | { | |
219 | efx_oword_t buf_tbl_upd; | |
220 | unsigned int start = buffer->index; | |
221 | unsigned int end = (buffer->index + buffer->entries - 1); | |
222 | ||
223 | if (!buffer->entries) | |
224 | return; | |
225 | ||
62776d03 BH |
226 | netif_dbg(efx, hw, efx->net_dev, "unmapping special buffers %d-%d\n", |
227 | buffer->index, buffer->index + buffer->entries - 1); | |
8e730c15 BH |
228 | |
229 | EFX_POPULATE_OWORD_4(buf_tbl_upd, | |
230 | FRF_AZ_BUF_UPD_CMD, 0, | |
231 | FRF_AZ_BUF_CLR_CMD, 1, | |
232 | FRF_AZ_BUF_CLR_END_ID, end, | |
233 | FRF_AZ_BUF_CLR_START_ID, start); | |
234 | efx_writeo(efx, &buf_tbl_upd, FR_AZ_BUF_TBL_UPD); | |
235 | } | |
236 | ||
237 | /* | |
238 | * Allocate a new special buffer | |
239 | * | |
240 | * This allocates memory for a new buffer, clears it and allocates a | |
241 | * new buffer ID range. It does not write into the buffer table. | |
242 | * | |
243 | * This call will allocate 4KB buffers, since 8KB buffers can't be | |
244 | * used for event queues and descriptor rings. | |
245 | */ | |
246 | static int efx_alloc_special_buffer(struct efx_nic *efx, | |
247 | struct efx_special_buffer *buffer, | |
248 | unsigned int len) | |
249 | { | |
250 | len = ALIGN(len, EFX_BUF_SIZE); | |
251 | ||
58758aa5 BH |
252 | buffer->addr = dma_alloc_coherent(&efx->pci_dev->dev, len, |
253 | &buffer->dma_addr, GFP_KERNEL); | |
8e730c15 BH |
254 | if (!buffer->addr) |
255 | return -ENOMEM; | |
256 | buffer->len = len; | |
257 | buffer->entries = len / EFX_BUF_SIZE; | |
258 | BUG_ON(buffer->dma_addr & (EFX_BUF_SIZE - 1)); | |
259 | ||
8e730c15 BH |
260 | /* Select new buffer ID */ |
261 | buffer->index = efx->next_buffer_table; | |
262 | efx->next_buffer_table += buffer->entries; | |
cd2d5b52 BH |
263 | #ifdef CONFIG_SFC_SRIOV |
264 | BUG_ON(efx_sriov_enabled(efx) && | |
265 | efx->vf_buftbl_base < efx->next_buffer_table); | |
266 | #endif | |
8e730c15 | 267 | |
62776d03 BH |
268 | netif_dbg(efx, probe, efx->net_dev, |
269 | "allocating special buffers %d-%d at %llx+%x " | |
270 | "(virt %p phys %llx)\n", buffer->index, | |
271 | buffer->index + buffer->entries - 1, | |
272 | (u64)buffer->dma_addr, len, | |
273 | buffer->addr, (u64)virt_to_phys(buffer->addr)); | |
8e730c15 BH |
274 | |
275 | return 0; | |
276 | } | |
277 | ||
278 | static void | |
279 | efx_free_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer) | |
280 | { | |
281 | if (!buffer->addr) | |
282 | return; | |
283 | ||
62776d03 BH |
284 | netif_dbg(efx, hw, efx->net_dev, |
285 | "deallocating special buffers %d-%d at %llx+%x " | |
286 | "(virt %p phys %llx)\n", buffer->index, | |
287 | buffer->index + buffer->entries - 1, | |
288 | (u64)buffer->dma_addr, buffer->len, | |
289 | buffer->addr, (u64)virt_to_phys(buffer->addr)); | |
8e730c15 | 290 | |
58758aa5 BH |
291 | dma_free_coherent(&efx->pci_dev->dev, buffer->len, buffer->addr, |
292 | buffer->dma_addr); | |
8e730c15 BH |
293 | buffer->addr = NULL; |
294 | buffer->entries = 0; | |
295 | } | |
296 | ||
297 | /************************************************************************** | |
298 | * | |
299 | * Generic buffer handling | |
f7251a9c | 300 | * These buffers are used for interrupt status, MAC stats, etc. |
8e730c15 BH |
301 | * |
302 | **************************************************************************/ | |
303 | ||
304 | int efx_nic_alloc_buffer(struct efx_nic *efx, struct efx_buffer *buffer, | |
305 | unsigned int len) | |
306 | { | |
0e33d870 | 307 | buffer->addr = dma_alloc_coherent(&efx->pci_dev->dev, len, |
1f9061d2 JP |
308 | &buffer->dma_addr, |
309 | GFP_ATOMIC | __GFP_ZERO); | |
8e730c15 BH |
310 | if (!buffer->addr) |
311 | return -ENOMEM; | |
312 | buffer->len = len; | |
8e730c15 BH |
313 | return 0; |
314 | } | |
315 | ||
316 | void efx_nic_free_buffer(struct efx_nic *efx, struct efx_buffer *buffer) | |
317 | { | |
318 | if (buffer->addr) { | |
0e33d870 BH |
319 | dma_free_coherent(&efx->pci_dev->dev, buffer->len, |
320 | buffer->addr, buffer->dma_addr); | |
8e730c15 BH |
321 | buffer->addr = NULL; |
322 | } | |
323 | } | |
324 | ||
325 | /************************************************************************** | |
326 | * | |
327 | * TX path | |
328 | * | |
329 | **************************************************************************/ | |
330 | ||
331 | /* Returns a pointer to the specified transmit descriptor in the TX | |
332 | * descriptor queue belonging to the specified channel. | |
333 | */ | |
334 | static inline efx_qword_t * | |
335 | efx_tx_desc(struct efx_tx_queue *tx_queue, unsigned int index) | |
336 | { | |
807540ba | 337 | return ((efx_qword_t *) (tx_queue->txd.addr)) + index; |
8e730c15 BH |
338 | } |
339 | ||
340 | /* This writes to the TX_DESC_WPTR; write pointer for TX descriptor ring */ | |
341 | static inline void efx_notify_tx_desc(struct efx_tx_queue *tx_queue) | |
342 | { | |
343 | unsigned write_ptr; | |
344 | efx_dword_t reg; | |
345 | ||
ecc910f5 | 346 | write_ptr = tx_queue->write_count & tx_queue->ptr_mask; |
8e730c15 BH |
347 | EFX_POPULATE_DWORD_1(reg, FRF_AZ_TX_DESC_WPTR_DWORD, write_ptr); |
348 | efx_writed_page(tx_queue->efx, ®, | |
349 | FR_AZ_TX_DESC_UPD_DWORD_P0, tx_queue->queue); | |
350 | } | |
351 | ||
cd38557d BH |
352 | /* Write pointer and first descriptor for TX descriptor ring */ |
353 | static inline void efx_push_tx_desc(struct efx_tx_queue *tx_queue, | |
354 | const efx_qword_t *txd) | |
355 | { | |
356 | unsigned write_ptr; | |
357 | efx_oword_t reg; | |
358 | ||
359 | BUILD_BUG_ON(FRF_AZ_TX_DESC_LBN != 0); | |
360 | BUILD_BUG_ON(FR_AA_TX_DESC_UPD_KER != FR_BZ_TX_DESC_UPD_P0); | |
361 | ||
362 | write_ptr = tx_queue->write_count & tx_queue->ptr_mask; | |
363 | EFX_POPULATE_OWORD_2(reg, FRF_AZ_TX_DESC_PUSH_CMD, true, | |
364 | FRF_AZ_TX_DESC_WPTR, write_ptr); | |
365 | reg.qword[0] = *txd; | |
366 | efx_writeo_page(tx_queue->efx, ®, | |
367 | FR_BZ_TX_DESC_UPD_P0, tx_queue->queue); | |
368 | } | |
369 | ||
370 | static inline bool | |
371 | efx_may_push_tx_desc(struct efx_tx_queue *tx_queue, unsigned int write_count) | |
372 | { | |
373 | unsigned empty_read_count = ACCESS_ONCE(tx_queue->empty_read_count); | |
374 | ||
375 | if (empty_read_count == 0) | |
376 | return false; | |
377 | ||
378 | tx_queue->empty_read_count = 0; | |
fae8563b BH |
379 | return ((empty_read_count ^ write_count) & ~EFX_EMPTY_COUNT_VALID) == 0 |
380 | && tx_queue->write_count - write_count == 1; | |
cd38557d | 381 | } |
8e730c15 BH |
382 | |
383 | /* For each entry inserted into the software descriptor ring, create a | |
384 | * descriptor in the hardware TX descriptor ring (in host memory), and | |
385 | * write a doorbell. | |
386 | */ | |
387 | void efx_nic_push_buffers(struct efx_tx_queue *tx_queue) | |
388 | { | |
389 | ||
390 | struct efx_tx_buffer *buffer; | |
391 | efx_qword_t *txd; | |
392 | unsigned write_ptr; | |
cd38557d | 393 | unsigned old_write_count = tx_queue->write_count; |
8e730c15 BH |
394 | |
395 | BUG_ON(tx_queue->write_count == tx_queue->insert_count); | |
396 | ||
397 | do { | |
ecc910f5 | 398 | write_ptr = tx_queue->write_count & tx_queue->ptr_mask; |
8e730c15 BH |
399 | buffer = &tx_queue->buffer[write_ptr]; |
400 | txd = efx_tx_desc(tx_queue, write_ptr); | |
401 | ++tx_queue->write_count; | |
402 | ||
403 | /* Create TX descriptor ring entry */ | |
7668ff9c | 404 | BUILD_BUG_ON(EFX_TX_BUF_CONT != 1); |
8e730c15 | 405 | EFX_POPULATE_QWORD_4(*txd, |
7668ff9c BH |
406 | FSF_AZ_TX_KER_CONT, |
407 | buffer->flags & EFX_TX_BUF_CONT, | |
8e730c15 BH |
408 | FSF_AZ_TX_KER_BYTE_COUNT, buffer->len, |
409 | FSF_AZ_TX_KER_BUF_REGION, 0, | |
410 | FSF_AZ_TX_KER_BUF_ADDR, buffer->dma_addr); | |
411 | } while (tx_queue->write_count != tx_queue->insert_count); | |
412 | ||
413 | wmb(); /* Ensure descriptors are written before they are fetched */ | |
cd38557d BH |
414 | |
415 | if (efx_may_push_tx_desc(tx_queue, old_write_count)) { | |
416 | txd = efx_tx_desc(tx_queue, | |
417 | old_write_count & tx_queue->ptr_mask); | |
418 | efx_push_tx_desc(tx_queue, txd); | |
419 | ++tx_queue->pushes; | |
420 | } else { | |
421 | efx_notify_tx_desc(tx_queue); | |
422 | } | |
8e730c15 BH |
423 | } |
424 | ||
425 | /* Allocate hardware resources for a TX queue */ | |
426 | int efx_nic_probe_tx(struct efx_tx_queue *tx_queue) | |
427 | { | |
428 | struct efx_nic *efx = tx_queue->efx; | |
ecc910f5 SH |
429 | unsigned entries; |
430 | ||
431 | entries = tx_queue->ptr_mask + 1; | |
8e730c15 | 432 | return efx_alloc_special_buffer(efx, &tx_queue->txd, |
ecc910f5 | 433 | entries * sizeof(efx_qword_t)); |
8e730c15 BH |
434 | } |
435 | ||
436 | void efx_nic_init_tx(struct efx_tx_queue *tx_queue) | |
437 | { | |
8e730c15 | 438 | struct efx_nic *efx = tx_queue->efx; |
94b274bf | 439 | efx_oword_t reg; |
8e730c15 | 440 | |
8e730c15 BH |
441 | /* Pin TX descriptor ring */ |
442 | efx_init_special_buffer(efx, &tx_queue->txd); | |
443 | ||
444 | /* Push TX descriptor ring to card */ | |
94b274bf | 445 | EFX_POPULATE_OWORD_10(reg, |
8e730c15 BH |
446 | FRF_AZ_TX_DESCQ_EN, 1, |
447 | FRF_AZ_TX_ISCSI_DDIG_EN, 0, | |
448 | FRF_AZ_TX_ISCSI_HDIG_EN, 0, | |
449 | FRF_AZ_TX_DESCQ_BUF_BASE_ID, tx_queue->txd.index, | |
450 | FRF_AZ_TX_DESCQ_EVQ_ID, | |
451 | tx_queue->channel->channel, | |
452 | FRF_AZ_TX_DESCQ_OWNER_ID, 0, | |
453 | FRF_AZ_TX_DESCQ_LABEL, tx_queue->queue, | |
454 | FRF_AZ_TX_DESCQ_SIZE, | |
455 | __ffs(tx_queue->txd.entries), | |
456 | FRF_AZ_TX_DESCQ_TYPE, 0, | |
457 | FRF_BZ_TX_NON_IP_DROP_DIS, 1); | |
458 | ||
459 | if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) { | |
a4900ac9 | 460 | int csum = tx_queue->queue & EFX_TXQ_TYPE_OFFLOAD; |
94b274bf BH |
461 | EFX_SET_OWORD_FIELD(reg, FRF_BZ_TX_IP_CHKSM_DIS, !csum); |
462 | EFX_SET_OWORD_FIELD(reg, FRF_BZ_TX_TCP_CHKSM_DIS, | |
8e730c15 BH |
463 | !csum); |
464 | } | |
465 | ||
94b274bf | 466 | efx_writeo_table(efx, ®, efx->type->txd_ptr_tbl_base, |
8e730c15 BH |
467 | tx_queue->queue); |
468 | ||
469 | if (efx_nic_rev(efx) < EFX_REV_FALCON_B0) { | |
8e730c15 | 470 | /* Only 128 bits in this register */ |
a4900ac9 | 471 | BUILD_BUG_ON(EFX_MAX_TX_QUEUES > 128); |
8e730c15 BH |
472 | |
473 | efx_reado(efx, ®, FR_AA_TX_CHKSM_CFG); | |
a4900ac9 | 474 | if (tx_queue->queue & EFX_TXQ_TYPE_OFFLOAD) |
32766ec8 | 475 | __clear_bit_le(tx_queue->queue, ®); |
8e730c15 | 476 | else |
32766ec8 | 477 | __set_bit_le(tx_queue->queue, ®); |
8e730c15 BH |
478 | efx_writeo(efx, ®, FR_AA_TX_CHKSM_CFG); |
479 | } | |
94b274bf BH |
480 | |
481 | if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) { | |
482 | EFX_POPULATE_OWORD_1(reg, | |
483 | FRF_BZ_TX_PACE, | |
484 | (tx_queue->queue & EFX_TXQ_TYPE_HIGHPRI) ? | |
485 | FFE_BZ_TX_PACE_OFF : | |
486 | FFE_BZ_TX_PACE_RESERVED); | |
487 | efx_writeo_table(efx, ®, FR_BZ_TX_PACE_TBL, | |
488 | tx_queue->queue); | |
489 | } | |
8e730c15 BH |
490 | } |
491 | ||
492 | static void efx_flush_tx_queue(struct efx_tx_queue *tx_queue) | |
493 | { | |
494 | struct efx_nic *efx = tx_queue->efx; | |
495 | efx_oword_t tx_flush_descq; | |
496 | ||
525d9e82 DP |
497 | WARN_ON(atomic_read(&tx_queue->flush_outstanding)); |
498 | atomic_set(&tx_queue->flush_outstanding, 1); | |
499 | ||
8e730c15 BH |
500 | EFX_POPULATE_OWORD_2(tx_flush_descq, |
501 | FRF_AZ_TX_FLUSH_DESCQ_CMD, 1, | |
502 | FRF_AZ_TX_FLUSH_DESCQ, tx_queue->queue); | |
503 | efx_writeo(efx, &tx_flush_descq, FR_AZ_TX_FLUSH_DESCQ); | |
504 | } | |
505 | ||
506 | void efx_nic_fini_tx(struct efx_tx_queue *tx_queue) | |
507 | { | |
508 | struct efx_nic *efx = tx_queue->efx; | |
509 | efx_oword_t tx_desc_ptr; | |
510 | ||
8e730c15 BH |
511 | /* Remove TX descriptor ring from card */ |
512 | EFX_ZERO_OWORD(tx_desc_ptr); | |
513 | efx_writeo_table(efx, &tx_desc_ptr, efx->type->txd_ptr_tbl_base, | |
514 | tx_queue->queue); | |
515 | ||
516 | /* Unpin TX descriptor ring */ | |
517 | efx_fini_special_buffer(efx, &tx_queue->txd); | |
518 | } | |
519 | ||
520 | /* Free buffers backing TX queue */ | |
521 | void efx_nic_remove_tx(struct efx_tx_queue *tx_queue) | |
522 | { | |
523 | efx_free_special_buffer(tx_queue->efx, &tx_queue->txd); | |
524 | } | |
525 | ||
526 | /************************************************************************** | |
527 | * | |
528 | * RX path | |
529 | * | |
530 | **************************************************************************/ | |
531 | ||
532 | /* Returns a pointer to the specified descriptor in the RX descriptor queue */ | |
533 | static inline efx_qword_t * | |
534 | efx_rx_desc(struct efx_rx_queue *rx_queue, unsigned int index) | |
535 | { | |
807540ba | 536 | return ((efx_qword_t *) (rx_queue->rxd.addr)) + index; |
8e730c15 BH |
537 | } |
538 | ||
539 | /* This creates an entry in the RX descriptor queue */ | |
540 | static inline void | |
541 | efx_build_rx_desc(struct efx_rx_queue *rx_queue, unsigned index) | |
542 | { | |
543 | struct efx_rx_buffer *rx_buf; | |
544 | efx_qword_t *rxd; | |
545 | ||
546 | rxd = efx_rx_desc(rx_queue, index); | |
547 | rx_buf = efx_rx_buffer(rx_queue, index); | |
548 | EFX_POPULATE_QWORD_3(*rxd, | |
549 | FSF_AZ_RX_KER_BUF_SIZE, | |
550 | rx_buf->len - | |
551 | rx_queue->efx->type->rx_buffer_padding, | |
552 | FSF_AZ_RX_KER_BUF_REGION, 0, | |
553 | FSF_AZ_RX_KER_BUF_ADDR, rx_buf->dma_addr); | |
554 | } | |
555 | ||
556 | /* This writes to the RX_DESC_WPTR register for the specified receive | |
557 | * descriptor ring. | |
558 | */ | |
559 | void efx_nic_notify_rx_desc(struct efx_rx_queue *rx_queue) | |
560 | { | |
ecc910f5 | 561 | struct efx_nic *efx = rx_queue->efx; |
8e730c15 BH |
562 | efx_dword_t reg; |
563 | unsigned write_ptr; | |
564 | ||
565 | while (rx_queue->notified_count != rx_queue->added_count) { | |
ecc910f5 SH |
566 | efx_build_rx_desc( |
567 | rx_queue, | |
568 | rx_queue->notified_count & rx_queue->ptr_mask); | |
8e730c15 BH |
569 | ++rx_queue->notified_count; |
570 | } | |
571 | ||
572 | wmb(); | |
ecc910f5 | 573 | write_ptr = rx_queue->added_count & rx_queue->ptr_mask; |
8e730c15 | 574 | EFX_POPULATE_DWORD_1(reg, FRF_AZ_RX_DESC_WPTR_DWORD, write_ptr); |
ecc910f5 | 575 | efx_writed_page(efx, ®, FR_AZ_RX_DESC_UPD_DWORD_P0, |
ba1e8a35 | 576 | efx_rx_queue_index(rx_queue)); |
8e730c15 BH |
577 | } |
578 | ||
579 | int efx_nic_probe_rx(struct efx_rx_queue *rx_queue) | |
580 | { | |
581 | struct efx_nic *efx = rx_queue->efx; | |
ecc910f5 SH |
582 | unsigned entries; |
583 | ||
584 | entries = rx_queue->ptr_mask + 1; | |
8e730c15 | 585 | return efx_alloc_special_buffer(efx, &rx_queue->rxd, |
ecc910f5 | 586 | entries * sizeof(efx_qword_t)); |
8e730c15 BH |
587 | } |
588 | ||
589 | void efx_nic_init_rx(struct efx_rx_queue *rx_queue) | |
590 | { | |
591 | efx_oword_t rx_desc_ptr; | |
592 | struct efx_nic *efx = rx_queue->efx; | |
593 | bool is_b0 = efx_nic_rev(efx) >= EFX_REV_FALCON_B0; | |
594 | bool iscsi_digest_en = is_b0; | |
85740cdf BH |
595 | bool jumbo_en; |
596 | ||
597 | /* For kernel-mode queues in Falcon A1, the JUMBO flag enables | |
598 | * DMA to continue after a PCIe page boundary (and scattering | |
599 | * is not possible). In Falcon B0 and Siena, it enables | |
600 | * scatter. | |
601 | */ | |
602 | jumbo_en = !is_b0 || efx->rx_scatter; | |
8e730c15 | 603 | |
62776d03 BH |
604 | netif_dbg(efx, hw, efx->net_dev, |
605 | "RX queue %d ring in special buffers %d-%d\n", | |
ba1e8a35 | 606 | efx_rx_queue_index(rx_queue), rx_queue->rxd.index, |
62776d03 | 607 | rx_queue->rxd.index + rx_queue->rxd.entries - 1); |
8e730c15 | 608 | |
85740cdf BH |
609 | rx_queue->scatter_n = 0; |
610 | ||
8e730c15 BH |
611 | /* Pin RX descriptor ring */ |
612 | efx_init_special_buffer(efx, &rx_queue->rxd); | |
613 | ||
614 | /* Push RX descriptor ring to card */ | |
615 | EFX_POPULATE_OWORD_10(rx_desc_ptr, | |
616 | FRF_AZ_RX_ISCSI_DDIG_EN, iscsi_digest_en, | |
617 | FRF_AZ_RX_ISCSI_HDIG_EN, iscsi_digest_en, | |
618 | FRF_AZ_RX_DESCQ_BUF_BASE_ID, rx_queue->rxd.index, | |
619 | FRF_AZ_RX_DESCQ_EVQ_ID, | |
ba1e8a35 | 620 | efx_rx_queue_channel(rx_queue)->channel, |
8e730c15 | 621 | FRF_AZ_RX_DESCQ_OWNER_ID, 0, |
ba1e8a35 BH |
622 | FRF_AZ_RX_DESCQ_LABEL, |
623 | efx_rx_queue_index(rx_queue), | |
8e730c15 BH |
624 | FRF_AZ_RX_DESCQ_SIZE, |
625 | __ffs(rx_queue->rxd.entries), | |
626 | FRF_AZ_RX_DESCQ_TYPE, 0 /* kernel queue */ , | |
85740cdf | 627 | FRF_AZ_RX_DESCQ_JUMBO, jumbo_en, |
8e730c15 BH |
628 | FRF_AZ_RX_DESCQ_EN, 1); |
629 | efx_writeo_table(efx, &rx_desc_ptr, efx->type->rxd_ptr_tbl_base, | |
ba1e8a35 | 630 | efx_rx_queue_index(rx_queue)); |
8e730c15 BH |
631 | } |
632 | ||
633 | static void efx_flush_rx_queue(struct efx_rx_queue *rx_queue) | |
634 | { | |
635 | struct efx_nic *efx = rx_queue->efx; | |
636 | efx_oword_t rx_flush_descq; | |
637 | ||
8e730c15 BH |
638 | EFX_POPULATE_OWORD_2(rx_flush_descq, |
639 | FRF_AZ_RX_FLUSH_DESCQ_CMD, 1, | |
ba1e8a35 BH |
640 | FRF_AZ_RX_FLUSH_DESCQ, |
641 | efx_rx_queue_index(rx_queue)); | |
8e730c15 BH |
642 | efx_writeo(efx, &rx_flush_descq, FR_AZ_RX_FLUSH_DESCQ); |
643 | } | |
644 | ||
645 | void efx_nic_fini_rx(struct efx_rx_queue *rx_queue) | |
646 | { | |
647 | efx_oword_t rx_desc_ptr; | |
648 | struct efx_nic *efx = rx_queue->efx; | |
649 | ||
8e730c15 BH |
650 | /* Remove RX descriptor ring from card */ |
651 | EFX_ZERO_OWORD(rx_desc_ptr); | |
652 | efx_writeo_table(efx, &rx_desc_ptr, efx->type->rxd_ptr_tbl_base, | |
ba1e8a35 | 653 | efx_rx_queue_index(rx_queue)); |
8e730c15 BH |
654 | |
655 | /* Unpin RX descriptor ring */ | |
656 | efx_fini_special_buffer(efx, &rx_queue->rxd); | |
657 | } | |
658 | ||
659 | /* Free buffers backing RX queue */ | |
660 | void efx_nic_remove_rx(struct efx_rx_queue *rx_queue) | |
661 | { | |
662 | efx_free_special_buffer(rx_queue->efx, &rx_queue->rxd); | |
663 | } | |
664 | ||
9f2cb71c BH |
665 | /************************************************************************** |
666 | * | |
667 | * Flush handling | |
668 | * | |
669 | **************************************************************************/ | |
670 | ||
671 | /* efx_nic_flush_queues() must be woken up when all flushes are completed, | |
672 | * or more RX flushes can be kicked off. | |
673 | */ | |
674 | static bool efx_flush_wake(struct efx_nic *efx) | |
675 | { | |
676 | /* Ensure that all updates are visible to efx_nic_flush_queues() */ | |
677 | smp_mb(); | |
678 | ||
679 | return (atomic_read(&efx->drain_pending) == 0 || | |
680 | (atomic_read(&efx->rxq_flush_outstanding) < EFX_RX_FLUSH_COUNT | |
681 | && atomic_read(&efx->rxq_flush_pending) > 0)); | |
682 | } | |
683 | ||
525d9e82 DP |
684 | static bool efx_check_tx_flush_complete(struct efx_nic *efx) |
685 | { | |
686 | bool i = true; | |
687 | efx_oword_t txd_ptr_tbl; | |
688 | struct efx_channel *channel; | |
689 | struct efx_tx_queue *tx_queue; | |
690 | ||
691 | efx_for_each_channel(channel, efx) { | |
692 | efx_for_each_channel_tx_queue(tx_queue, channel) { | |
693 | efx_reado_table(efx, &txd_ptr_tbl, | |
694 | FR_BZ_TX_DESC_PTR_TBL, tx_queue->queue); | |
695 | if (EFX_OWORD_FIELD(txd_ptr_tbl, | |
696 | FRF_AZ_TX_DESCQ_FLUSH) || | |
697 | EFX_OWORD_FIELD(txd_ptr_tbl, | |
698 | FRF_AZ_TX_DESCQ_EN)) { | |
699 | netif_dbg(efx, hw, efx->net_dev, | |
700 | "flush did not complete on TXQ %d\n", | |
701 | tx_queue->queue); | |
702 | i = false; | |
703 | } else if (atomic_cmpxchg(&tx_queue->flush_outstanding, | |
704 | 1, 0)) { | |
705 | /* The flush is complete, but we didn't | |
706 | * receive a flush completion event | |
707 | */ | |
708 | netif_dbg(efx, hw, efx->net_dev, | |
709 | "flush complete on TXQ %d, so drain " | |
710 | "the queue\n", tx_queue->queue); | |
711 | /* Don't need to increment drain_pending as it | |
712 | * has already been incremented for the queues | |
713 | * which did not drain | |
714 | */ | |
715 | efx_magic_event(channel, | |
716 | EFX_CHANNEL_MAGIC_TX_DRAIN( | |
717 | tx_queue)); | |
718 | } | |
719 | } | |
720 | } | |
721 | ||
722 | return i; | |
723 | } | |
724 | ||
9f2cb71c BH |
725 | /* Flush all the transmit queues, and continue flushing receive queues until |
726 | * they're all flushed. Wait for the DRAIN events to be recieved so that there | |
727 | * are no more RX and TX events left on any channel. */ | |
728 | int efx_nic_flush_queues(struct efx_nic *efx) | |
729 | { | |
730 | unsigned timeout = msecs_to_jiffies(5000); /* 5s for all flushes and drains */ | |
731 | struct efx_channel *channel; | |
732 | struct efx_rx_queue *rx_queue; | |
733 | struct efx_tx_queue *tx_queue; | |
734 | int rc = 0; | |
735 | ||
736 | efx->type->prepare_flush(efx); | |
737 | ||
738 | efx_for_each_channel(channel, efx) { | |
739 | efx_for_each_channel_tx_queue(tx_queue, channel) { | |
740 | atomic_inc(&efx->drain_pending); | |
741 | efx_flush_tx_queue(tx_queue); | |
742 | } | |
743 | efx_for_each_channel_rx_queue(rx_queue, channel) { | |
744 | atomic_inc(&efx->drain_pending); | |
745 | rx_queue->flush_pending = true; | |
746 | atomic_inc(&efx->rxq_flush_pending); | |
747 | } | |
748 | } | |
749 | ||
750 | while (timeout && atomic_read(&efx->drain_pending) > 0) { | |
cd2d5b52 BH |
751 | /* If SRIOV is enabled, then offload receive queue flushing to |
752 | * the firmware (though we will still have to poll for | |
753 | * completion). If that fails, fall back to the old scheme. | |
754 | */ | |
755 | if (efx_sriov_enabled(efx)) { | |
756 | rc = efx_mcdi_flush_rxqs(efx); | |
757 | if (!rc) | |
758 | goto wait; | |
759 | } | |
760 | ||
9f2cb71c BH |
761 | /* The hardware supports four concurrent rx flushes, each of |
762 | * which may need to be retried if there is an outstanding | |
763 | * descriptor fetch | |
764 | */ | |
765 | efx_for_each_channel(channel, efx) { | |
766 | efx_for_each_channel_rx_queue(rx_queue, channel) { | |
767 | if (atomic_read(&efx->rxq_flush_outstanding) >= | |
768 | EFX_RX_FLUSH_COUNT) | |
769 | break; | |
770 | ||
771 | if (rx_queue->flush_pending) { | |
772 | rx_queue->flush_pending = false; | |
773 | atomic_dec(&efx->rxq_flush_pending); | |
774 | atomic_inc(&efx->rxq_flush_outstanding); | |
775 | efx_flush_rx_queue(rx_queue); | |
776 | } | |
777 | } | |
778 | } | |
779 | ||
cd2d5b52 | 780 | wait: |
9f2cb71c BH |
781 | timeout = wait_event_timeout(efx->flush_wq, efx_flush_wake(efx), |
782 | timeout); | |
783 | } | |
784 | ||
525d9e82 DP |
785 | if (atomic_read(&efx->drain_pending) && |
786 | !efx_check_tx_flush_complete(efx)) { | |
9f2cb71c BH |
787 | netif_err(efx, hw, efx->net_dev, "failed to flush %d queues " |
788 | "(rx %d+%d)\n", atomic_read(&efx->drain_pending), | |
789 | atomic_read(&efx->rxq_flush_outstanding), | |
790 | atomic_read(&efx->rxq_flush_pending)); | |
791 | rc = -ETIMEDOUT; | |
792 | ||
793 | atomic_set(&efx->drain_pending, 0); | |
794 | atomic_set(&efx->rxq_flush_pending, 0); | |
795 | atomic_set(&efx->rxq_flush_outstanding, 0); | |
796 | } | |
797 | ||
d5e8cc6c | 798 | efx->type->finish_flush(efx); |
a606f432 | 799 | |
9f2cb71c BH |
800 | return rc; |
801 | } | |
802 | ||
8e730c15 BH |
803 | /************************************************************************** |
804 | * | |
805 | * Event queue processing | |
806 | * Event queues are processed by per-channel tasklets. | |
807 | * | |
808 | **************************************************************************/ | |
809 | ||
810 | /* Update a channel's event queue's read pointer (RPTR) register | |
811 | * | |
812 | * This writes the EVQ_RPTR_REG register for the specified channel's | |
813 | * event queue. | |
8e730c15 BH |
814 | */ |
815 | void efx_nic_eventq_read_ack(struct efx_channel *channel) | |
816 | { | |
817 | efx_dword_t reg; | |
818 | struct efx_nic *efx = channel->efx; | |
819 | ||
d4fabcc8 BH |
820 | EFX_POPULATE_DWORD_1(reg, FRF_AZ_EVQ_RPTR, |
821 | channel->eventq_read_ptr & channel->eventq_mask); | |
778cdaf6 BH |
822 | |
823 | /* For Falcon A1, EVQ_RPTR_KER is documented as having a step size | |
824 | * of 4 bytes, but it is really 16 bytes just like later revisions. | |
825 | */ | |
826 | efx_writed(efx, ®, | |
827 | efx->type->evq_rptr_tbl_base + | |
828 | FR_BZ_EVQ_RPTR_STEP * channel->channel); | |
8e730c15 BH |
829 | } |
830 | ||
831 | /* Use HW to insert a SW defined event */ | |
90893000 BH |
832 | void efx_generate_event(struct efx_nic *efx, unsigned int evq, |
833 | efx_qword_t *event) | |
8e730c15 BH |
834 | { |
835 | efx_oword_t drv_ev_reg; | |
836 | ||
837 | BUILD_BUG_ON(FRF_AZ_DRV_EV_DATA_LBN != 0 || | |
838 | FRF_AZ_DRV_EV_DATA_WIDTH != 64); | |
839 | drv_ev_reg.u32[0] = event->u32[0]; | |
840 | drv_ev_reg.u32[1] = event->u32[1]; | |
841 | drv_ev_reg.u32[2] = 0; | |
842 | drv_ev_reg.u32[3] = 0; | |
90893000 BH |
843 | EFX_SET_OWORD_FIELD(drv_ev_reg, FRF_AZ_DRV_EV_QID, evq); |
844 | efx_writeo(efx, &drv_ev_reg, FR_AZ_DRV_EV); | |
8e730c15 BH |
845 | } |
846 | ||
4ef594eb BH |
847 | static void efx_magic_event(struct efx_channel *channel, u32 magic) |
848 | { | |
849 | efx_qword_t event; | |
850 | ||
851 | EFX_POPULATE_QWORD_2(event, FSF_AZ_EV_CODE, | |
852 | FSE_AZ_EV_CODE_DRV_GEN_EV, | |
853 | FSF_AZ_DRV_GEN_EV_MAGIC, magic); | |
90893000 | 854 | efx_generate_event(channel->efx, channel->channel, &event); |
4ef594eb BH |
855 | } |
856 | ||
8e730c15 BH |
857 | /* Handle a transmit completion event |
858 | * | |
859 | * The NIC batches TX completion events; the message we receive is of | |
860 | * the form "complete all TX events up to this index". | |
861 | */ | |
fa236e18 | 862 | static int |
8e730c15 BH |
863 | efx_handle_tx_event(struct efx_channel *channel, efx_qword_t *event) |
864 | { | |
865 | unsigned int tx_ev_desc_ptr; | |
866 | unsigned int tx_ev_q_label; | |
867 | struct efx_tx_queue *tx_queue; | |
868 | struct efx_nic *efx = channel->efx; | |
fa236e18 | 869 | int tx_packets = 0; |
8e730c15 | 870 | |
9f2cb71c BH |
871 | if (unlikely(ACCESS_ONCE(efx->reset_pending))) |
872 | return 0; | |
873 | ||
8e730c15 BH |
874 | if (likely(EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_COMP))) { |
875 | /* Transmit completion */ | |
876 | tx_ev_desc_ptr = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_DESC_PTR); | |
877 | tx_ev_q_label = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_Q_LABEL); | |
f7d12cdc BH |
878 | tx_queue = efx_channel_get_tx_queue( |
879 | channel, tx_ev_q_label % EFX_TXQ_TYPES); | |
fa236e18 | 880 | tx_packets = ((tx_ev_desc_ptr - tx_queue->read_count) & |
ecc910f5 | 881 | tx_queue->ptr_mask); |
8e730c15 BH |
882 | efx_xmit_done(tx_queue, tx_ev_desc_ptr); |
883 | } else if (EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_WQ_FF_FULL)) { | |
884 | /* Rewrite the FIFO write pointer */ | |
885 | tx_ev_q_label = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_Q_LABEL); | |
f7d12cdc BH |
886 | tx_queue = efx_channel_get_tx_queue( |
887 | channel, tx_ev_q_label % EFX_TXQ_TYPES); | |
8e730c15 | 888 | |
73ba7b68 | 889 | netif_tx_lock(efx->net_dev); |
8e730c15 | 890 | efx_notify_tx_desc(tx_queue); |
73ba7b68 | 891 | netif_tx_unlock(efx->net_dev); |
8e730c15 BH |
892 | } else if (EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_PKT_ERR) && |
893 | EFX_WORKAROUND_10727(efx)) { | |
894 | efx_schedule_reset(efx, RESET_TYPE_TX_DESC_FETCH); | |
895 | } else { | |
62776d03 BH |
896 | netif_err(efx, tx_err, efx->net_dev, |
897 | "channel %d unexpected TX event " | |
898 | EFX_QWORD_FMT"\n", channel->channel, | |
899 | EFX_QWORD_VAL(*event)); | |
8e730c15 | 900 | } |
fa236e18 BH |
901 | |
902 | return tx_packets; | |
8e730c15 BH |
903 | } |
904 | ||
905 | /* Detect errors included in the rx_evt_pkt_ok bit. */ | |
db339569 BH |
906 | static u16 efx_handle_rx_not_ok(struct efx_rx_queue *rx_queue, |
907 | const efx_qword_t *event) | |
8e730c15 | 908 | { |
ba1e8a35 | 909 | struct efx_channel *channel = efx_rx_queue_channel(rx_queue); |
8e730c15 BH |
910 | struct efx_nic *efx = rx_queue->efx; |
911 | bool rx_ev_buf_owner_id_err, rx_ev_ip_hdr_chksum_err; | |
912 | bool rx_ev_tcp_udp_chksum_err, rx_ev_eth_crc_err; | |
913 | bool rx_ev_frm_trunc, rx_ev_drib_nib, rx_ev_tobe_disc; | |
914 | bool rx_ev_other_err, rx_ev_pause_frm; | |
915 | bool rx_ev_hdr_type, rx_ev_mcast_pkt; | |
916 | unsigned rx_ev_pkt_type; | |
917 | ||
918 | rx_ev_hdr_type = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_HDR_TYPE); | |
919 | rx_ev_mcast_pkt = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_MCAST_PKT); | |
920 | rx_ev_tobe_disc = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_TOBE_DISC); | |
921 | rx_ev_pkt_type = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_PKT_TYPE); | |
922 | rx_ev_buf_owner_id_err = EFX_QWORD_FIELD(*event, | |
923 | FSF_AZ_RX_EV_BUF_OWNER_ID_ERR); | |
924 | rx_ev_ip_hdr_chksum_err = EFX_QWORD_FIELD(*event, | |
925 | FSF_AZ_RX_EV_IP_HDR_CHKSUM_ERR); | |
926 | rx_ev_tcp_udp_chksum_err = EFX_QWORD_FIELD(*event, | |
927 | FSF_AZ_RX_EV_TCP_UDP_CHKSUM_ERR); | |
928 | rx_ev_eth_crc_err = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_ETH_CRC_ERR); | |
929 | rx_ev_frm_trunc = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_FRM_TRUNC); | |
930 | rx_ev_drib_nib = ((efx_nic_rev(efx) >= EFX_REV_FALCON_B0) ? | |
931 | 0 : EFX_QWORD_FIELD(*event, FSF_AA_RX_EV_DRIB_NIB)); | |
932 | rx_ev_pause_frm = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_PAUSE_FRM_ERR); | |
933 | ||
934 | /* Every error apart from tobe_disc and pause_frm */ | |
935 | rx_ev_other_err = (rx_ev_drib_nib | rx_ev_tcp_udp_chksum_err | | |
936 | rx_ev_buf_owner_id_err | rx_ev_eth_crc_err | | |
937 | rx_ev_frm_trunc | rx_ev_ip_hdr_chksum_err); | |
938 | ||
939 | /* Count errors that are not in MAC stats. Ignore expected | |
940 | * checksum errors during self-test. */ | |
941 | if (rx_ev_frm_trunc) | |
ba1e8a35 | 942 | ++channel->n_rx_frm_trunc; |
8e730c15 | 943 | else if (rx_ev_tobe_disc) |
ba1e8a35 | 944 | ++channel->n_rx_tobe_disc; |
8e730c15 BH |
945 | else if (!efx->loopback_selftest) { |
946 | if (rx_ev_ip_hdr_chksum_err) | |
ba1e8a35 | 947 | ++channel->n_rx_ip_hdr_chksum_err; |
8e730c15 | 948 | else if (rx_ev_tcp_udp_chksum_err) |
ba1e8a35 | 949 | ++channel->n_rx_tcp_udp_chksum_err; |
8e730c15 BH |
950 | } |
951 | ||
8e730c15 BH |
952 | /* TOBE_DISC is expected on unicast mismatches; don't print out an |
953 | * error message. FRM_TRUNC indicates RXDP dropped the packet due | |
954 | * to a FIFO overflow. | |
955 | */ | |
5f3f9d6c | 956 | #ifdef DEBUG |
62776d03 BH |
957 | if (rx_ev_other_err && net_ratelimit()) { |
958 | netif_dbg(efx, rx_err, efx->net_dev, | |
959 | " RX queue %d unexpected RX event " | |
960 | EFX_QWORD_FMT "%s%s%s%s%s%s%s%s\n", | |
ba1e8a35 | 961 | efx_rx_queue_index(rx_queue), EFX_QWORD_VAL(*event), |
62776d03 BH |
962 | rx_ev_buf_owner_id_err ? " [OWNER_ID_ERR]" : "", |
963 | rx_ev_ip_hdr_chksum_err ? | |
964 | " [IP_HDR_CHKSUM_ERR]" : "", | |
965 | rx_ev_tcp_udp_chksum_err ? | |
966 | " [TCP_UDP_CHKSUM_ERR]" : "", | |
967 | rx_ev_eth_crc_err ? " [ETH_CRC_ERR]" : "", | |
968 | rx_ev_frm_trunc ? " [FRM_TRUNC]" : "", | |
969 | rx_ev_drib_nib ? " [DRIB_NIB]" : "", | |
970 | rx_ev_tobe_disc ? " [TOBE_DISC]" : "", | |
971 | rx_ev_pause_frm ? " [PAUSE]" : ""); | |
8e730c15 BH |
972 | } |
973 | #endif | |
db339569 BH |
974 | |
975 | /* The frame must be discarded if any of these are true. */ | |
976 | return (rx_ev_eth_crc_err | rx_ev_frm_trunc | rx_ev_drib_nib | | |
977 | rx_ev_tobe_disc | rx_ev_pause_frm) ? | |
978 | EFX_RX_PKT_DISCARD : 0; | |
8e730c15 BH |
979 | } |
980 | ||
85740cdf BH |
981 | /* Handle receive events that are not in-order. Return true if this |
982 | * can be handled as a partial packet discard, false if it's more | |
983 | * serious. | |
984 | */ | |
985 | static bool | |
8e730c15 BH |
986 | efx_handle_rx_bad_index(struct efx_rx_queue *rx_queue, unsigned index) |
987 | { | |
85740cdf | 988 | struct efx_channel *channel = efx_rx_queue_channel(rx_queue); |
8e730c15 BH |
989 | struct efx_nic *efx = rx_queue->efx; |
990 | unsigned expected, dropped; | |
991 | ||
85740cdf BH |
992 | if (rx_queue->scatter_n && |
993 | index == ((rx_queue->removed_count + rx_queue->scatter_n - 1) & | |
994 | rx_queue->ptr_mask)) { | |
995 | ++channel->n_rx_nodesc_trunc; | |
996 | return true; | |
997 | } | |
998 | ||
ecc910f5 SH |
999 | expected = rx_queue->removed_count & rx_queue->ptr_mask; |
1000 | dropped = (index - expected) & rx_queue->ptr_mask; | |
62776d03 BH |
1001 | netif_info(efx, rx_err, efx->net_dev, |
1002 | "dropped %d events (index=%d expected=%d)\n", | |
1003 | dropped, index, expected); | |
8e730c15 BH |
1004 | |
1005 | efx_schedule_reset(efx, EFX_WORKAROUND_5676(efx) ? | |
1006 | RESET_TYPE_RX_RECOVERY : RESET_TYPE_DISABLE); | |
85740cdf | 1007 | return false; |
8e730c15 BH |
1008 | } |
1009 | ||
1010 | /* Handle a packet received event | |
1011 | * | |
1012 | * The NIC gives a "discard" flag if it's a unicast packet with the | |
1013 | * wrong destination address | |
1014 | * Also "is multicast" and "matches multicast filter" flags can be used to | |
1015 | * discard non-matching multicast packets. | |
1016 | */ | |
1017 | static void | |
1018 | efx_handle_rx_event(struct efx_channel *channel, const efx_qword_t *event) | |
1019 | { | |
1020 | unsigned int rx_ev_desc_ptr, rx_ev_byte_cnt; | |
1021 | unsigned int rx_ev_hdr_type, rx_ev_mcast_pkt; | |
1022 | unsigned expected_ptr; | |
85740cdf | 1023 | bool rx_ev_pkt_ok, rx_ev_sop, rx_ev_cont; |
db339569 | 1024 | u16 flags; |
8e730c15 | 1025 | struct efx_rx_queue *rx_queue; |
9f2cb71c BH |
1026 | struct efx_nic *efx = channel->efx; |
1027 | ||
1028 | if (unlikely(ACCESS_ONCE(efx->reset_pending))) | |
1029 | return; | |
8e730c15 | 1030 | |
85740cdf BH |
1031 | rx_ev_cont = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_JUMBO_CONT); |
1032 | rx_ev_sop = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_SOP); | |
8e730c15 BH |
1033 | WARN_ON(EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_Q_LABEL) != |
1034 | channel->channel); | |
1035 | ||
f7d12cdc | 1036 | rx_queue = efx_channel_get_rx_queue(channel); |
8e730c15 BH |
1037 | |
1038 | rx_ev_desc_ptr = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_DESC_PTR); | |
85740cdf BH |
1039 | expected_ptr = ((rx_queue->removed_count + rx_queue->scatter_n) & |
1040 | rx_queue->ptr_mask); | |
1041 | ||
1042 | /* Check for partial drops and other errors */ | |
1043 | if (unlikely(rx_ev_desc_ptr != expected_ptr) || | |
1044 | unlikely(rx_ev_sop != (rx_queue->scatter_n == 0))) { | |
1045 | if (rx_ev_desc_ptr != expected_ptr && | |
1046 | !efx_handle_rx_bad_index(rx_queue, rx_ev_desc_ptr)) | |
1047 | return; | |
1048 | ||
1049 | /* Discard all pending fragments */ | |
1050 | if (rx_queue->scatter_n) { | |
1051 | efx_rx_packet( | |
1052 | rx_queue, | |
1053 | rx_queue->removed_count & rx_queue->ptr_mask, | |
1054 | rx_queue->scatter_n, 0, EFX_RX_PKT_DISCARD); | |
1055 | rx_queue->removed_count += rx_queue->scatter_n; | |
1056 | rx_queue->scatter_n = 0; | |
1057 | } | |
1058 | ||
1059 | /* Return if there is no new fragment */ | |
1060 | if (rx_ev_desc_ptr != expected_ptr) | |
1061 | return; | |
1062 | ||
1063 | /* Discard new fragment if not SOP */ | |
1064 | if (!rx_ev_sop) { | |
1065 | efx_rx_packet( | |
1066 | rx_queue, | |
1067 | rx_queue->removed_count & rx_queue->ptr_mask, | |
1068 | 1, 0, EFX_RX_PKT_DISCARD); | |
1069 | ++rx_queue->removed_count; | |
1070 | return; | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | ++rx_queue->scatter_n; | |
1075 | if (rx_ev_cont) | |
1076 | return; | |
1077 | ||
1078 | rx_ev_byte_cnt = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_BYTE_CNT); | |
1079 | rx_ev_pkt_ok = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_PKT_OK); | |
1080 | rx_ev_hdr_type = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_HDR_TYPE); | |
8e730c15 BH |
1081 | |
1082 | if (likely(rx_ev_pkt_ok)) { | |
1083 | /* If packet is marked as OK and packet type is TCP/IP or | |
1084 | * UDP/IP, then we can rely on the hardware checksum. | |
1085 | */ | |
db339569 BH |
1086 | flags = (rx_ev_hdr_type == FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_TCP || |
1087 | rx_ev_hdr_type == FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_UDP) ? | |
1088 | EFX_RX_PKT_CSUMMED : 0; | |
8e730c15 | 1089 | } else { |
db339569 | 1090 | flags = efx_handle_rx_not_ok(rx_queue, event); |
8e730c15 BH |
1091 | } |
1092 | ||
1093 | /* Detect multicast packets that didn't match the filter */ | |
1094 | rx_ev_mcast_pkt = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_MCAST_PKT); | |
1095 | if (rx_ev_mcast_pkt) { | |
1096 | unsigned int rx_ev_mcast_hash_match = | |
1097 | EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_MCAST_HASH_MATCH); | |
1098 | ||
1099 | if (unlikely(!rx_ev_mcast_hash_match)) { | |
1100 | ++channel->n_rx_mcast_mismatch; | |
db339569 | 1101 | flags |= EFX_RX_PKT_DISCARD; |
8e730c15 BH |
1102 | } |
1103 | } | |
1104 | ||
1105 | channel->irq_mod_score += 2; | |
1106 | ||
1107 | /* Handle received packet */ | |
85740cdf BH |
1108 | efx_rx_packet(rx_queue, |
1109 | rx_queue->removed_count & rx_queue->ptr_mask, | |
1110 | rx_queue->scatter_n, rx_ev_byte_cnt, flags); | |
1111 | rx_queue->removed_count += rx_queue->scatter_n; | |
1112 | rx_queue->scatter_n = 0; | |
8e730c15 BH |
1113 | } |
1114 | ||
9f2cb71c BH |
1115 | /* If this flush done event corresponds to a &struct efx_tx_queue, then |
1116 | * send an %EFX_CHANNEL_MAGIC_TX_DRAIN event to drain the event queue | |
1117 | * of all transmit completions. | |
1118 | */ | |
1119 | static void | |
1120 | efx_handle_tx_flush_done(struct efx_nic *efx, efx_qword_t *event) | |
1121 | { | |
1122 | struct efx_tx_queue *tx_queue; | |
1123 | int qid; | |
1124 | ||
1125 | qid = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_SUBDATA); | |
1126 | if (qid < EFX_TXQ_TYPES * efx->n_tx_channels) { | |
1127 | tx_queue = efx_get_tx_queue(efx, qid / EFX_TXQ_TYPES, | |
1128 | qid % EFX_TXQ_TYPES); | |
525d9e82 DP |
1129 | if (atomic_cmpxchg(&tx_queue->flush_outstanding, 1, 0)) { |
1130 | efx_magic_event(tx_queue->channel, | |
1131 | EFX_CHANNEL_MAGIC_TX_DRAIN(tx_queue)); | |
1132 | } | |
9f2cb71c BH |
1133 | } |
1134 | } | |
1135 | ||
1136 | /* If this flush done event corresponds to a &struct efx_rx_queue: If the flush | |
1137 | * was succesful then send an %EFX_CHANNEL_MAGIC_RX_DRAIN, otherwise add | |
1138 | * the RX queue back to the mask of RX queues in need of flushing. | |
1139 | */ | |
1140 | static void | |
1141 | efx_handle_rx_flush_done(struct efx_nic *efx, efx_qword_t *event) | |
1142 | { | |
1143 | struct efx_channel *channel; | |
1144 | struct efx_rx_queue *rx_queue; | |
1145 | int qid; | |
1146 | bool failed; | |
1147 | ||
1148 | qid = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_RX_DESCQ_ID); | |
1149 | failed = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_RX_FLUSH_FAIL); | |
1150 | if (qid >= efx->n_channels) | |
1151 | return; | |
1152 | channel = efx_get_channel(efx, qid); | |
1153 | if (!efx_channel_has_rx_queue(channel)) | |
1154 | return; | |
1155 | rx_queue = efx_channel_get_rx_queue(channel); | |
1156 | ||
1157 | if (failed) { | |
1158 | netif_info(efx, hw, efx->net_dev, | |
1159 | "RXQ %d flush retry\n", qid); | |
1160 | rx_queue->flush_pending = true; | |
1161 | atomic_inc(&efx->rxq_flush_pending); | |
1162 | } else { | |
1163 | efx_magic_event(efx_rx_queue_channel(rx_queue), | |
1164 | EFX_CHANNEL_MAGIC_RX_DRAIN(rx_queue)); | |
1165 | } | |
1166 | atomic_dec(&efx->rxq_flush_outstanding); | |
1167 | if (efx_flush_wake(efx)) | |
1168 | wake_up(&efx->flush_wq); | |
1169 | } | |
1170 | ||
1171 | static void | |
1172 | efx_handle_drain_event(struct efx_channel *channel) | |
1173 | { | |
1174 | struct efx_nic *efx = channel->efx; | |
1175 | ||
1176 | WARN_ON(atomic_read(&efx->drain_pending) == 0); | |
1177 | atomic_dec(&efx->drain_pending); | |
1178 | if (efx_flush_wake(efx)) | |
1179 | wake_up(&efx->flush_wq); | |
1180 | } | |
1181 | ||
90d683af SH |
1182 | static void |
1183 | efx_handle_generated_event(struct efx_channel *channel, efx_qword_t *event) | |
1184 | { | |
1185 | struct efx_nic *efx = channel->efx; | |
2ae75dac BH |
1186 | struct efx_rx_queue *rx_queue = |
1187 | efx_channel_has_rx_queue(channel) ? | |
1188 | efx_channel_get_rx_queue(channel) : NULL; | |
9f2cb71c | 1189 | unsigned magic, code; |
90d683af | 1190 | |
4ef594eb | 1191 | magic = EFX_QWORD_FIELD(*event, FSF_AZ_DRV_GEN_EV_MAGIC); |
9f2cb71c | 1192 | code = _EFX_CHANNEL_MAGIC_CODE(magic); |
4ef594eb | 1193 | |
9f2cb71c | 1194 | if (magic == EFX_CHANNEL_MAGIC_TEST(channel)) { |
dd40781e | 1195 | channel->event_test_cpu = raw_smp_processor_id(); |
9f2cb71c | 1196 | } else if (rx_queue && magic == EFX_CHANNEL_MAGIC_FILL(rx_queue)) { |
90d683af SH |
1197 | /* The queue must be empty, so we won't receive any rx |
1198 | * events, so efx_process_channel() won't refill the | |
1199 | * queue. Refill it here */ | |
2ae75dac | 1200 | efx_fast_push_rx_descriptors(rx_queue); |
9f2cb71c BH |
1201 | } else if (rx_queue && magic == EFX_CHANNEL_MAGIC_RX_DRAIN(rx_queue)) { |
1202 | rx_queue->enabled = false; | |
1203 | efx_handle_drain_event(channel); | |
1204 | } else if (code == _EFX_CHANNEL_MAGIC_TX_DRAIN) { | |
1205 | efx_handle_drain_event(channel); | |
1206 | } else { | |
62776d03 BH |
1207 | netif_dbg(efx, hw, efx->net_dev, "channel %d received " |
1208 | "generated event "EFX_QWORD_FMT"\n", | |
1209 | channel->channel, EFX_QWORD_VAL(*event)); | |
9f2cb71c | 1210 | } |
90d683af SH |
1211 | } |
1212 | ||
8e730c15 BH |
1213 | static void |
1214 | efx_handle_driver_event(struct efx_channel *channel, efx_qword_t *event) | |
1215 | { | |
1216 | struct efx_nic *efx = channel->efx; | |
1217 | unsigned int ev_sub_code; | |
1218 | unsigned int ev_sub_data; | |
1219 | ||
1220 | ev_sub_code = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_SUBCODE); | |
1221 | ev_sub_data = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_SUBDATA); | |
1222 | ||
1223 | switch (ev_sub_code) { | |
1224 | case FSE_AZ_TX_DESCQ_FLS_DONE_EV: | |
62776d03 BH |
1225 | netif_vdbg(efx, hw, efx->net_dev, "channel %d TXQ %d flushed\n", |
1226 | channel->channel, ev_sub_data); | |
9f2cb71c | 1227 | efx_handle_tx_flush_done(efx, event); |
cd2d5b52 | 1228 | efx_sriov_tx_flush_done(efx, event); |
8e730c15 BH |
1229 | break; |
1230 | case FSE_AZ_RX_DESCQ_FLS_DONE_EV: | |
62776d03 BH |
1231 | netif_vdbg(efx, hw, efx->net_dev, "channel %d RXQ %d flushed\n", |
1232 | channel->channel, ev_sub_data); | |
9f2cb71c | 1233 | efx_handle_rx_flush_done(efx, event); |
cd2d5b52 | 1234 | efx_sriov_rx_flush_done(efx, event); |
8e730c15 BH |
1235 | break; |
1236 | case FSE_AZ_EVQ_INIT_DONE_EV: | |
62776d03 BH |
1237 | netif_dbg(efx, hw, efx->net_dev, |
1238 | "channel %d EVQ %d initialised\n", | |
1239 | channel->channel, ev_sub_data); | |
8e730c15 BH |
1240 | break; |
1241 | case FSE_AZ_SRM_UPD_DONE_EV: | |
62776d03 BH |
1242 | netif_vdbg(efx, hw, efx->net_dev, |
1243 | "channel %d SRAM update done\n", channel->channel); | |
8e730c15 BH |
1244 | break; |
1245 | case FSE_AZ_WAKE_UP_EV: | |
62776d03 BH |
1246 | netif_vdbg(efx, hw, efx->net_dev, |
1247 | "channel %d RXQ %d wakeup event\n", | |
1248 | channel->channel, ev_sub_data); | |
8e730c15 BH |
1249 | break; |
1250 | case FSE_AZ_TIMER_EV: | |
62776d03 BH |
1251 | netif_vdbg(efx, hw, efx->net_dev, |
1252 | "channel %d RX queue %d timer expired\n", | |
1253 | channel->channel, ev_sub_data); | |
8e730c15 BH |
1254 | break; |
1255 | case FSE_AA_RX_RECOVER_EV: | |
62776d03 BH |
1256 | netif_err(efx, rx_err, efx->net_dev, |
1257 | "channel %d seen DRIVER RX_RESET event. " | |
8e730c15 BH |
1258 | "Resetting.\n", channel->channel); |
1259 | atomic_inc(&efx->rx_reset); | |
1260 | efx_schedule_reset(efx, | |
1261 | EFX_WORKAROUND_6555(efx) ? | |
1262 | RESET_TYPE_RX_RECOVERY : | |
1263 | RESET_TYPE_DISABLE); | |
1264 | break; | |
1265 | case FSE_BZ_RX_DSC_ERROR_EV: | |
cd2d5b52 BH |
1266 | if (ev_sub_data < EFX_VI_BASE) { |
1267 | netif_err(efx, rx_err, efx->net_dev, | |
1268 | "RX DMA Q %d reports descriptor fetch error." | |
1269 | " RX Q %d is disabled.\n", ev_sub_data, | |
1270 | ev_sub_data); | |
1271 | efx_schedule_reset(efx, RESET_TYPE_RX_DESC_FETCH); | |
1272 | } else | |
1273 | efx_sriov_desc_fetch_err(efx, ev_sub_data); | |
8e730c15 BH |
1274 | break; |
1275 | case FSE_BZ_TX_DSC_ERROR_EV: | |
cd2d5b52 BH |
1276 | if (ev_sub_data < EFX_VI_BASE) { |
1277 | netif_err(efx, tx_err, efx->net_dev, | |
1278 | "TX DMA Q %d reports descriptor fetch error." | |
1279 | " TX Q %d is disabled.\n", ev_sub_data, | |
1280 | ev_sub_data); | |
1281 | efx_schedule_reset(efx, RESET_TYPE_TX_DESC_FETCH); | |
1282 | } else | |
1283 | efx_sriov_desc_fetch_err(efx, ev_sub_data); | |
8e730c15 BH |
1284 | break; |
1285 | default: | |
62776d03 BH |
1286 | netif_vdbg(efx, hw, efx->net_dev, |
1287 | "channel %d unknown driver event code %d " | |
1288 | "data %04x\n", channel->channel, ev_sub_code, | |
1289 | ev_sub_data); | |
8e730c15 BH |
1290 | break; |
1291 | } | |
1292 | } | |
1293 | ||
fa236e18 | 1294 | int efx_nic_process_eventq(struct efx_channel *channel, int budget) |
8e730c15 | 1295 | { |
ecc910f5 | 1296 | struct efx_nic *efx = channel->efx; |
8e730c15 BH |
1297 | unsigned int read_ptr; |
1298 | efx_qword_t event, *p_event; | |
1299 | int ev_code; | |
fa236e18 BH |
1300 | int tx_packets = 0; |
1301 | int spent = 0; | |
8e730c15 BH |
1302 | |
1303 | read_ptr = channel->eventq_read_ptr; | |
1304 | ||
fa236e18 | 1305 | for (;;) { |
8e730c15 BH |
1306 | p_event = efx_event(channel, read_ptr); |
1307 | event = *p_event; | |
1308 | ||
1309 | if (!efx_event_present(&event)) | |
1310 | /* End of events */ | |
1311 | break; | |
1312 | ||
62776d03 BH |
1313 | netif_vdbg(channel->efx, intr, channel->efx->net_dev, |
1314 | "channel %d event is "EFX_QWORD_FMT"\n", | |
1315 | channel->channel, EFX_QWORD_VAL(event)); | |
8e730c15 BH |
1316 | |
1317 | /* Clear this event by marking it all ones */ | |
1318 | EFX_SET_QWORD(*p_event); | |
1319 | ||
d4fabcc8 | 1320 | ++read_ptr; |
fa236e18 | 1321 | |
8e730c15 BH |
1322 | ev_code = EFX_QWORD_FIELD(event, FSF_AZ_EV_CODE); |
1323 | ||
1324 | switch (ev_code) { | |
1325 | case FSE_AZ_EV_CODE_RX_EV: | |
1326 | efx_handle_rx_event(channel, &event); | |
fa236e18 BH |
1327 | if (++spent == budget) |
1328 | goto out; | |
8e730c15 BH |
1329 | break; |
1330 | case FSE_AZ_EV_CODE_TX_EV: | |
fa236e18 | 1331 | tx_packets += efx_handle_tx_event(channel, &event); |
ecc910f5 | 1332 | if (tx_packets > efx->txq_entries) { |
fa236e18 BH |
1333 | spent = budget; |
1334 | goto out; | |
1335 | } | |
8e730c15 BH |
1336 | break; |
1337 | case FSE_AZ_EV_CODE_DRV_GEN_EV: | |
90d683af | 1338 | efx_handle_generated_event(channel, &event); |
8e730c15 | 1339 | break; |
8e730c15 BH |
1340 | case FSE_AZ_EV_CODE_DRIVER_EV: |
1341 | efx_handle_driver_event(channel, &event); | |
1342 | break; | |
cd2d5b52 BH |
1343 | case FSE_CZ_EV_CODE_USER_EV: |
1344 | efx_sriov_event(channel, &event); | |
1345 | break; | |
8880f4ec BH |
1346 | case FSE_CZ_EV_CODE_MCDI_EV: |
1347 | efx_mcdi_process_event(channel, &event); | |
1348 | break; | |
40641ed9 BH |
1349 | case FSE_AZ_EV_CODE_GLOBAL_EV: |
1350 | if (efx->type->handle_global_event && | |
1351 | efx->type->handle_global_event(channel, &event)) | |
1352 | break; | |
1353 | /* else fall through */ | |
8e730c15 | 1354 | default: |
62776d03 BH |
1355 | netif_err(channel->efx, hw, channel->efx->net_dev, |
1356 | "channel %d unknown event type %d (data " | |
1357 | EFX_QWORD_FMT ")\n", channel->channel, | |
1358 | ev_code, EFX_QWORD_VAL(event)); | |
8e730c15 | 1359 | } |
fa236e18 | 1360 | } |
8e730c15 | 1361 | |
fa236e18 | 1362 | out: |
8e730c15 | 1363 | channel->eventq_read_ptr = read_ptr; |
fa236e18 | 1364 | return spent; |
8e730c15 BH |
1365 | } |
1366 | ||
d4fabcc8 BH |
1367 | /* Check whether an event is present in the eventq at the current |
1368 | * read pointer. Only useful for self-test. | |
1369 | */ | |
1370 | bool efx_nic_event_present(struct efx_channel *channel) | |
1371 | { | |
1372 | return efx_event_present(efx_event(channel, channel->eventq_read_ptr)); | |
1373 | } | |
8e730c15 BH |
1374 | |
1375 | /* Allocate buffer table entries for event queue */ | |
1376 | int efx_nic_probe_eventq(struct efx_channel *channel) | |
1377 | { | |
1378 | struct efx_nic *efx = channel->efx; | |
ecc910f5 SH |
1379 | unsigned entries; |
1380 | ||
1381 | entries = channel->eventq_mask + 1; | |
8e730c15 | 1382 | return efx_alloc_special_buffer(efx, &channel->eventq, |
ecc910f5 | 1383 | entries * sizeof(efx_qword_t)); |
8e730c15 BH |
1384 | } |
1385 | ||
1386 | void efx_nic_init_eventq(struct efx_channel *channel) | |
1387 | { | |
8880f4ec | 1388 | efx_oword_t reg; |
8e730c15 BH |
1389 | struct efx_nic *efx = channel->efx; |
1390 | ||
62776d03 BH |
1391 | netif_dbg(efx, hw, efx->net_dev, |
1392 | "channel %d event queue in special buffers %d-%d\n", | |
1393 | channel->channel, channel->eventq.index, | |
1394 | channel->eventq.index + channel->eventq.entries - 1); | |
8e730c15 | 1395 | |
8880f4ec BH |
1396 | if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) { |
1397 | EFX_POPULATE_OWORD_3(reg, | |
1398 | FRF_CZ_TIMER_Q_EN, 1, | |
1399 | FRF_CZ_HOST_NOTIFY_MODE, 0, | |
1400 | FRF_CZ_TIMER_MODE, FFE_CZ_TIMER_MODE_DIS); | |
1401 | efx_writeo_table(efx, ®, FR_BZ_TIMER_TBL, channel->channel); | |
1402 | } | |
1403 | ||
8e730c15 BH |
1404 | /* Pin event queue buffer */ |
1405 | efx_init_special_buffer(efx, &channel->eventq); | |
1406 | ||
1407 | /* Fill event queue with all ones (i.e. empty events) */ | |
1408 | memset(channel->eventq.addr, 0xff, channel->eventq.len); | |
1409 | ||
1410 | /* Push event queue to card */ | |
8880f4ec | 1411 | EFX_POPULATE_OWORD_3(reg, |
8e730c15 BH |
1412 | FRF_AZ_EVQ_EN, 1, |
1413 | FRF_AZ_EVQ_SIZE, __ffs(channel->eventq.entries), | |
1414 | FRF_AZ_EVQ_BUF_BASE_ID, channel->eventq.index); | |
8880f4ec | 1415 | efx_writeo_table(efx, ®, efx->type->evq_ptr_tbl_base, |
8e730c15 BH |
1416 | channel->channel); |
1417 | ||
1418 | efx->type->push_irq_moderation(channel); | |
1419 | } | |
1420 | ||
1421 | void efx_nic_fini_eventq(struct efx_channel *channel) | |
1422 | { | |
8880f4ec | 1423 | efx_oword_t reg; |
8e730c15 BH |
1424 | struct efx_nic *efx = channel->efx; |
1425 | ||
1426 | /* Remove event queue from card */ | |
8880f4ec BH |
1427 | EFX_ZERO_OWORD(reg); |
1428 | efx_writeo_table(efx, ®, efx->type->evq_ptr_tbl_base, | |
8e730c15 | 1429 | channel->channel); |
8880f4ec BH |
1430 | if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) |
1431 | efx_writeo_table(efx, ®, FR_BZ_TIMER_TBL, channel->channel); | |
8e730c15 BH |
1432 | |
1433 | /* Unpin event queue */ | |
1434 | efx_fini_special_buffer(efx, &channel->eventq); | |
1435 | } | |
1436 | ||
1437 | /* Free buffers backing event queue */ | |
1438 | void efx_nic_remove_eventq(struct efx_channel *channel) | |
1439 | { | |
1440 | efx_free_special_buffer(channel->efx, &channel->eventq); | |
1441 | } | |
1442 | ||
1443 | ||
eee6f6a9 | 1444 | void efx_nic_event_test_start(struct efx_channel *channel) |
8e730c15 | 1445 | { |
dd40781e | 1446 | channel->event_test_cpu = -1; |
eee6f6a9 | 1447 | smp_wmb(); |
4ef594eb | 1448 | efx_magic_event(channel, EFX_CHANNEL_MAGIC_TEST(channel)); |
90d683af SH |
1449 | } |
1450 | ||
2ae75dac | 1451 | void efx_nic_generate_fill_event(struct efx_rx_queue *rx_queue) |
90d683af | 1452 | { |
2ae75dac BH |
1453 | efx_magic_event(efx_rx_queue_channel(rx_queue), |
1454 | EFX_CHANNEL_MAGIC_FILL(rx_queue)); | |
8e730c15 BH |
1455 | } |
1456 | ||
8e730c15 BH |
1457 | /************************************************************************** |
1458 | * | |
1459 | * Hardware interrupts | |
1460 | * The hardware interrupt handler does very little work; all the event | |
1461 | * queue processing is carried out by per-channel tasklets. | |
1462 | * | |
1463 | **************************************************************************/ | |
1464 | ||
1465 | /* Enable/disable/generate interrupts */ | |
1466 | static inline void efx_nic_interrupts(struct efx_nic *efx, | |
1467 | bool enabled, bool force) | |
1468 | { | |
1469 | efx_oword_t int_en_reg_ker; | |
8880f4ec BH |
1470 | |
1471 | EFX_POPULATE_OWORD_3(int_en_reg_ker, | |
1646a6f3 | 1472 | FRF_AZ_KER_INT_LEVE_SEL, efx->irq_level, |
8e730c15 BH |
1473 | FRF_AZ_KER_INT_KER, force, |
1474 | FRF_AZ_DRV_INT_EN_KER, enabled); | |
1475 | efx_writeo(efx, &int_en_reg_ker, FR_AZ_INT_EN_KER); | |
1476 | } | |
1477 | ||
1478 | void efx_nic_enable_interrupts(struct efx_nic *efx) | |
1479 | { | |
8e730c15 BH |
1480 | EFX_ZERO_OWORD(*((efx_oword_t *) efx->irq_status.addr)); |
1481 | wmb(); /* Ensure interrupt vector is clear before interrupts enabled */ | |
1482 | ||
8e730c15 | 1483 | efx_nic_interrupts(efx, true, false); |
8e730c15 BH |
1484 | } |
1485 | ||
1486 | void efx_nic_disable_interrupts(struct efx_nic *efx) | |
1487 | { | |
1488 | /* Disable interrupts */ | |
1489 | efx_nic_interrupts(efx, false, false); | |
1490 | } | |
1491 | ||
1492 | /* Generate a test interrupt | |
1493 | * Interrupt must already have been enabled, otherwise nasty things | |
1494 | * may happen. | |
1495 | */ | |
eee6f6a9 | 1496 | void efx_nic_irq_test_start(struct efx_nic *efx) |
8e730c15 | 1497 | { |
eee6f6a9 BH |
1498 | efx->last_irq_cpu = -1; |
1499 | smp_wmb(); | |
8e730c15 BH |
1500 | efx_nic_interrupts(efx, true, true); |
1501 | } | |
1502 | ||
1503 | /* Process a fatal interrupt | |
1504 | * Disable bus mastering ASAP and schedule a reset | |
1505 | */ | |
1506 | irqreturn_t efx_nic_fatal_interrupt(struct efx_nic *efx) | |
1507 | { | |
1508 | struct falcon_nic_data *nic_data = efx->nic_data; | |
1509 | efx_oword_t *int_ker = efx->irq_status.addr; | |
1510 | efx_oword_t fatal_intr; | |
1511 | int error, mem_perr; | |
1512 | ||
1513 | efx_reado(efx, &fatal_intr, FR_AZ_FATAL_INTR_KER); | |
1514 | error = EFX_OWORD_FIELD(fatal_intr, FRF_AZ_FATAL_INTR); | |
1515 | ||
62776d03 BH |
1516 | netif_err(efx, hw, efx->net_dev, "SYSTEM ERROR "EFX_OWORD_FMT" status " |
1517 | EFX_OWORD_FMT ": %s\n", EFX_OWORD_VAL(*int_ker), | |
1518 | EFX_OWORD_VAL(fatal_intr), | |
1519 | error ? "disabling bus mastering" : "no recognised error"); | |
8e730c15 BH |
1520 | |
1521 | /* If this is a memory parity error dump which blocks are offending */ | |
97e1eaa0 SH |
1522 | mem_perr = (EFX_OWORD_FIELD(fatal_intr, FRF_AZ_MEM_PERR_INT_KER) || |
1523 | EFX_OWORD_FIELD(fatal_intr, FRF_AZ_SRM_PERR_INT_KER)); | |
8e730c15 BH |
1524 | if (mem_perr) { |
1525 | efx_oword_t reg; | |
1526 | efx_reado(efx, ®, FR_AZ_MEM_STAT); | |
62776d03 BH |
1527 | netif_err(efx, hw, efx->net_dev, |
1528 | "SYSTEM ERROR: memory parity error "EFX_OWORD_FMT"\n", | |
1529 | EFX_OWORD_VAL(reg)); | |
8e730c15 BH |
1530 | } |
1531 | ||
1532 | /* Disable both devices */ | |
1533 | pci_clear_master(efx->pci_dev); | |
1534 | if (efx_nic_is_dual_func(efx)) | |
1535 | pci_clear_master(nic_data->pci_dev2); | |
1536 | efx_nic_disable_interrupts(efx); | |
1537 | ||
1538 | /* Count errors and reset or disable the NIC accordingly */ | |
1539 | if (efx->int_error_count == 0 || | |
1540 | time_after(jiffies, efx->int_error_expire)) { | |
1541 | efx->int_error_count = 0; | |
1542 | efx->int_error_expire = | |
1543 | jiffies + EFX_INT_ERROR_EXPIRE * HZ; | |
1544 | } | |
1545 | if (++efx->int_error_count < EFX_MAX_INT_ERRORS) { | |
62776d03 BH |
1546 | netif_err(efx, hw, efx->net_dev, |
1547 | "SYSTEM ERROR - reset scheduled\n"); | |
8e730c15 BH |
1548 | efx_schedule_reset(efx, RESET_TYPE_INT_ERROR); |
1549 | } else { | |
62776d03 BH |
1550 | netif_err(efx, hw, efx->net_dev, |
1551 | "SYSTEM ERROR - max number of errors seen." | |
1552 | "NIC will be disabled\n"); | |
8e730c15 BH |
1553 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); |
1554 | } | |
63695459 | 1555 | |
8e730c15 BH |
1556 | return IRQ_HANDLED; |
1557 | } | |
1558 | ||
1559 | /* Handle a legacy interrupt | |
1560 | * Acknowledges the interrupt and schedule event queue processing. | |
1561 | */ | |
1562 | static irqreturn_t efx_legacy_interrupt(int irq, void *dev_id) | |
1563 | { | |
1564 | struct efx_nic *efx = dev_id; | |
1565 | efx_oword_t *int_ker = efx->irq_status.addr; | |
1566 | irqreturn_t result = IRQ_NONE; | |
1567 | struct efx_channel *channel; | |
1568 | efx_dword_t reg; | |
1569 | u32 queues; | |
1570 | int syserr; | |
1571 | ||
94dec6a2 BH |
1572 | /* Could this be ours? If interrupts are disabled then the |
1573 | * channel state may not be valid. | |
1574 | */ | |
1575 | if (!efx->legacy_irq_enabled) | |
1576 | return result; | |
1577 | ||
8e730c15 BH |
1578 | /* Read the ISR which also ACKs the interrupts */ |
1579 | efx_readd(efx, ®, FR_BZ_INT_ISR0); | |
1580 | queues = EFX_EXTRACT_DWORD(reg, 0, 31); | |
1581 | ||
1646a6f3 BH |
1582 | /* Handle non-event-queue sources */ |
1583 | if (queues & (1U << efx->irq_level)) { | |
63695459 SH |
1584 | syserr = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_FATAL_INT); |
1585 | if (unlikely(syserr)) | |
1586 | return efx_nic_fatal_interrupt(efx); | |
1646a6f3 | 1587 | efx->last_irq_cpu = raw_smp_processor_id(); |
63695459 | 1588 | } |
8e730c15 | 1589 | |
8880f4ec BH |
1590 | if (queues != 0) { |
1591 | if (EFX_WORKAROUND_15783(efx)) | |
1592 | efx->irq_zero_count = 0; | |
1593 | ||
1594 | /* Schedule processing of any interrupting queues */ | |
1595 | efx_for_each_channel(channel, efx) { | |
1596 | if (queues & 1) | |
1646a6f3 | 1597 | efx_schedule_channel_irq(channel); |
8880f4ec | 1598 | queues >>= 1; |
8e730c15 | 1599 | } |
8880f4ec BH |
1600 | result = IRQ_HANDLED; |
1601 | ||
41b7e4c3 | 1602 | } else if (EFX_WORKAROUND_15783(efx)) { |
8880f4ec BH |
1603 | efx_qword_t *event; |
1604 | ||
41b7e4c3 SH |
1605 | /* We can't return IRQ_HANDLED more than once on seeing ISR=0 |
1606 | * because this might be a shared interrupt. */ | |
1607 | if (efx->irq_zero_count++ == 0) | |
1608 | result = IRQ_HANDLED; | |
1609 | ||
1610 | /* Ensure we schedule or rearm all event queues */ | |
8880f4ec BH |
1611 | efx_for_each_channel(channel, efx) { |
1612 | event = efx_event(channel, channel->eventq_read_ptr); | |
1613 | if (efx_event_present(event)) | |
1646a6f3 | 1614 | efx_schedule_channel_irq(channel); |
41b7e4c3 SH |
1615 | else |
1616 | efx_nic_eventq_read_ack(channel); | |
8880f4ec | 1617 | } |
8e730c15 BH |
1618 | } |
1619 | ||
1646a6f3 | 1620 | if (result == IRQ_HANDLED) |
62776d03 BH |
1621 | netif_vdbg(efx, intr, efx->net_dev, |
1622 | "IRQ %d on CPU %d status " EFX_DWORD_FMT "\n", | |
1623 | irq, raw_smp_processor_id(), EFX_DWORD_VAL(reg)); | |
8e730c15 BH |
1624 | |
1625 | return result; | |
1626 | } | |
1627 | ||
1628 | /* Handle an MSI interrupt | |
1629 | * | |
1630 | * Handle an MSI hardware interrupt. This routine schedules event | |
1631 | * queue processing. No interrupt acknowledgement cycle is necessary. | |
1632 | * Also, we never need to check that the interrupt is for us, since | |
1633 | * MSI interrupts cannot be shared. | |
1634 | */ | |
1635 | static irqreturn_t efx_msi_interrupt(int irq, void *dev_id) | |
1636 | { | |
4642610c | 1637 | struct efx_channel *channel = *(struct efx_channel **)dev_id; |
8e730c15 BH |
1638 | struct efx_nic *efx = channel->efx; |
1639 | efx_oword_t *int_ker = efx->irq_status.addr; | |
1640 | int syserr; | |
1641 | ||
62776d03 BH |
1642 | netif_vdbg(efx, intr, efx->net_dev, |
1643 | "IRQ %d on CPU %d status " EFX_OWORD_FMT "\n", | |
1644 | irq, raw_smp_processor_id(), EFX_OWORD_VAL(*int_ker)); | |
8e730c15 | 1645 | |
1646a6f3 BH |
1646 | /* Handle non-event-queue sources */ |
1647 | if (channel->channel == efx->irq_level) { | |
63695459 SH |
1648 | syserr = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_FATAL_INT); |
1649 | if (unlikely(syserr)) | |
1650 | return efx_nic_fatal_interrupt(efx); | |
1646a6f3 | 1651 | efx->last_irq_cpu = raw_smp_processor_id(); |
63695459 | 1652 | } |
8e730c15 BH |
1653 | |
1654 | /* Schedule processing of the channel */ | |
1646a6f3 | 1655 | efx_schedule_channel_irq(channel); |
8e730c15 BH |
1656 | |
1657 | return IRQ_HANDLED; | |
1658 | } | |
1659 | ||
1660 | ||
1661 | /* Setup RSS indirection table. | |
1662 | * This maps from the hash value of the packet to RXQ | |
1663 | */ | |
765c9f46 | 1664 | void efx_nic_push_rx_indir_table(struct efx_nic *efx) |
8e730c15 | 1665 | { |
765c9f46 | 1666 | size_t i = 0; |
8e730c15 BH |
1667 | efx_dword_t dword; |
1668 | ||
1669 | if (efx_nic_rev(efx) < EFX_REV_FALCON_B0) | |
1670 | return; | |
1671 | ||
765c9f46 BH |
1672 | BUILD_BUG_ON(ARRAY_SIZE(efx->rx_indir_table) != |
1673 | FR_BZ_RX_INDIRECTION_TBL_ROWS); | |
1674 | ||
1675 | for (i = 0; i < FR_BZ_RX_INDIRECTION_TBL_ROWS; i++) { | |
8e730c15 | 1676 | EFX_POPULATE_DWORD_1(dword, FRF_BZ_IT_QUEUE, |
765c9f46 | 1677 | efx->rx_indir_table[i]); |
778cdaf6 BH |
1678 | efx_writed(efx, &dword, |
1679 | FR_BZ_RX_INDIRECTION_TBL + | |
1680 | FR_BZ_RX_INDIRECTION_TBL_STEP * i); | |
8e730c15 BH |
1681 | } |
1682 | } | |
1683 | ||
1684 | /* Hook interrupt handler(s) | |
1685 | * Try MSI and then legacy interrupts. | |
1686 | */ | |
1687 | int efx_nic_init_interrupt(struct efx_nic *efx) | |
1688 | { | |
1689 | struct efx_channel *channel; | |
1690 | int rc; | |
1691 | ||
1692 | if (!EFX_INT_MODE_USE_MSI(efx)) { | |
1693 | irq_handler_t handler; | |
1694 | if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) | |
1695 | handler = efx_legacy_interrupt; | |
1696 | else | |
1697 | handler = falcon_legacy_interrupt_a1; | |
1698 | ||
1699 | rc = request_irq(efx->legacy_irq, handler, IRQF_SHARED, | |
1700 | efx->name, efx); | |
1701 | if (rc) { | |
62776d03 BH |
1702 | netif_err(efx, drv, efx->net_dev, |
1703 | "failed to hook legacy IRQ %d\n", | |
1704 | efx->pci_dev->irq); | |
8e730c15 BH |
1705 | goto fail1; |
1706 | } | |
1707 | return 0; | |
1708 | } | |
1709 | ||
1710 | /* Hook MSI or MSI-X interrupt */ | |
1711 | efx_for_each_channel(channel, efx) { | |
1712 | rc = request_irq(channel->irq, efx_msi_interrupt, | |
1713 | IRQF_PROBE_SHARED, /* Not shared */ | |
4642610c BH |
1714 | efx->channel_name[channel->channel], |
1715 | &efx->channel[channel->channel]); | |
8e730c15 | 1716 | if (rc) { |
62776d03 BH |
1717 | netif_err(efx, drv, efx->net_dev, |
1718 | "failed to hook IRQ %d\n", channel->irq); | |
8e730c15 BH |
1719 | goto fail2; |
1720 | } | |
1721 | } | |
1722 | ||
1723 | return 0; | |
1724 | ||
1725 | fail2: | |
1726 | efx_for_each_channel(channel, efx) | |
4642610c | 1727 | free_irq(channel->irq, &efx->channel[channel->channel]); |
8e730c15 BH |
1728 | fail1: |
1729 | return rc; | |
1730 | } | |
1731 | ||
1732 | void efx_nic_fini_interrupt(struct efx_nic *efx) | |
1733 | { | |
1734 | struct efx_channel *channel; | |
1735 | efx_oword_t reg; | |
1736 | ||
1737 | /* Disable MSI/MSI-X interrupts */ | |
1738 | efx_for_each_channel(channel, efx) { | |
1739 | if (channel->irq) | |
4642610c | 1740 | free_irq(channel->irq, &efx->channel[channel->channel]); |
8e730c15 BH |
1741 | } |
1742 | ||
1743 | /* ACK legacy interrupt */ | |
1744 | if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) | |
1745 | efx_reado(efx, ®, FR_BZ_INT_ISR0); | |
1746 | else | |
1747 | falcon_irq_ack_a1(efx); | |
1748 | ||
1749 | /* Disable legacy interrupt */ | |
1750 | if (efx->legacy_irq) | |
1751 | free_irq(efx->legacy_irq, efx); | |
1752 | } | |
1753 | ||
cd2d5b52 BH |
1754 | /* Looks at available SRAM resources and works out how many queues we |
1755 | * can support, and where things like descriptor caches should live. | |
1756 | * | |
1757 | * SRAM is split up as follows: | |
1758 | * 0 buftbl entries for channels | |
1759 | * efx->vf_buftbl_base buftbl entries for SR-IOV | |
1760 | * efx->rx_dc_base RX descriptor caches | |
1761 | * efx->tx_dc_base TX descriptor caches | |
1762 | */ | |
28e47c49 BH |
1763 | void efx_nic_dimension_resources(struct efx_nic *efx, unsigned sram_lim_qw) |
1764 | { | |
1765 | unsigned vi_count, buftbl_min; | |
1766 | ||
1767 | /* Account for the buffer table entries backing the datapath channels | |
1768 | * and the descriptor caches for those channels. | |
1769 | */ | |
1770 | buftbl_min = ((efx->n_rx_channels * EFX_MAX_DMAQ_SIZE + | |
1771 | efx->n_tx_channels * EFX_TXQ_TYPES * EFX_MAX_DMAQ_SIZE + | |
1772 | efx->n_channels * EFX_MAX_EVQ_SIZE) | |
1773 | * sizeof(efx_qword_t) / EFX_BUF_SIZE); | |
1774 | vi_count = max(efx->n_channels, efx->n_tx_channels * EFX_TXQ_TYPES); | |
1775 | ||
cd2d5b52 BH |
1776 | #ifdef CONFIG_SFC_SRIOV |
1777 | if (efx_sriov_wanted(efx)) { | |
1778 | unsigned vi_dc_entries, buftbl_free, entries_per_vf, vf_limit; | |
1779 | ||
1780 | efx->vf_buftbl_base = buftbl_min; | |
1781 | ||
1782 | vi_dc_entries = RX_DC_ENTRIES + TX_DC_ENTRIES; | |
1783 | vi_count = max(vi_count, EFX_VI_BASE); | |
1784 | buftbl_free = (sram_lim_qw - buftbl_min - | |
1785 | vi_count * vi_dc_entries); | |
1786 | ||
1787 | entries_per_vf = ((vi_dc_entries + EFX_VF_BUFTBL_PER_VI) * | |
1788 | efx_vf_size(efx)); | |
1789 | vf_limit = min(buftbl_free / entries_per_vf, | |
1790 | (1024U - EFX_VI_BASE) >> efx->vi_scale); | |
1791 | ||
1792 | if (efx->vf_count > vf_limit) { | |
1793 | netif_err(efx, probe, efx->net_dev, | |
1794 | "Reducing VF count from from %d to %d\n", | |
1795 | efx->vf_count, vf_limit); | |
1796 | efx->vf_count = vf_limit; | |
1797 | } | |
1798 | vi_count += efx->vf_count * efx_vf_size(efx); | |
1799 | } | |
1800 | #endif | |
1801 | ||
28e47c49 BH |
1802 | efx->tx_dc_base = sram_lim_qw - vi_count * TX_DC_ENTRIES; |
1803 | efx->rx_dc_base = efx->tx_dc_base - vi_count * RX_DC_ENTRIES; | |
1804 | } | |
1805 | ||
8e730c15 BH |
1806 | u32 efx_nic_fpga_ver(struct efx_nic *efx) |
1807 | { | |
1808 | efx_oword_t altera_build; | |
1809 | efx_reado(efx, &altera_build, FR_AZ_ALTERA_BUILD); | |
1810 | return EFX_OWORD_FIELD(altera_build, FRF_AZ_ALTERA_BUILD_VER); | |
1811 | } | |
1812 | ||
1813 | void efx_nic_init_common(struct efx_nic *efx) | |
1814 | { | |
1815 | efx_oword_t temp; | |
1816 | ||
1817 | /* Set positions of descriptor caches in SRAM. */ | |
28e47c49 | 1818 | EFX_POPULATE_OWORD_1(temp, FRF_AZ_SRM_TX_DC_BASE_ADR, efx->tx_dc_base); |
8e730c15 | 1819 | efx_writeo(efx, &temp, FR_AZ_SRM_TX_DC_CFG); |
28e47c49 | 1820 | EFX_POPULATE_OWORD_1(temp, FRF_AZ_SRM_RX_DC_BASE_ADR, efx->rx_dc_base); |
8e730c15 BH |
1821 | efx_writeo(efx, &temp, FR_AZ_SRM_RX_DC_CFG); |
1822 | ||
1823 | /* Set TX descriptor cache size. */ | |
1824 | BUILD_BUG_ON(TX_DC_ENTRIES != (8 << TX_DC_ENTRIES_ORDER)); | |
1825 | EFX_POPULATE_OWORD_1(temp, FRF_AZ_TX_DC_SIZE, TX_DC_ENTRIES_ORDER); | |
1826 | efx_writeo(efx, &temp, FR_AZ_TX_DC_CFG); | |
1827 | ||
1828 | /* Set RX descriptor cache size. Set low watermark to size-8, as | |
1829 | * this allows most efficient prefetching. | |
1830 | */ | |
1831 | BUILD_BUG_ON(RX_DC_ENTRIES != (8 << RX_DC_ENTRIES_ORDER)); | |
1832 | EFX_POPULATE_OWORD_1(temp, FRF_AZ_RX_DC_SIZE, RX_DC_ENTRIES_ORDER); | |
1833 | efx_writeo(efx, &temp, FR_AZ_RX_DC_CFG); | |
1834 | EFX_POPULATE_OWORD_1(temp, FRF_AZ_RX_DC_PF_LWM, RX_DC_ENTRIES - 8); | |
1835 | efx_writeo(efx, &temp, FR_AZ_RX_DC_PF_WM); | |
1836 | ||
1837 | /* Program INT_KER address */ | |
1838 | EFX_POPULATE_OWORD_2(temp, | |
1839 | FRF_AZ_NORM_INT_VEC_DIS_KER, | |
1840 | EFX_INT_MODE_USE_MSI(efx), | |
1841 | FRF_AZ_INT_ADR_KER, efx->irq_status.dma_addr); | |
1842 | efx_writeo(efx, &temp, FR_AZ_INT_ADR_KER); | |
1843 | ||
63695459 SH |
1844 | if (EFX_WORKAROUND_17213(efx) && !EFX_INT_MODE_USE_MSI(efx)) |
1845 | /* Use an interrupt level unused by event queues */ | |
1646a6f3 | 1846 | efx->irq_level = 0x1f; |
63695459 SH |
1847 | else |
1848 | /* Use a valid MSI-X vector */ | |
1646a6f3 | 1849 | efx->irq_level = 0; |
63695459 | 1850 | |
8e730c15 BH |
1851 | /* Enable all the genuinely fatal interrupts. (They are still |
1852 | * masked by the overall interrupt mask, controlled by | |
1853 | * falcon_interrupts()). | |
1854 | * | |
1855 | * Note: All other fatal interrupts are enabled | |
1856 | */ | |
1857 | EFX_POPULATE_OWORD_3(temp, | |
1858 | FRF_AZ_ILL_ADR_INT_KER_EN, 1, | |
1859 | FRF_AZ_RBUF_OWN_INT_KER_EN, 1, | |
1860 | FRF_AZ_TBUF_OWN_INT_KER_EN, 1); | |
b17424b0 SH |
1861 | if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0) |
1862 | EFX_SET_OWORD_FIELD(temp, FRF_CZ_SRAM_PERR_INT_P_KER_EN, 1); | |
8e730c15 BH |
1863 | EFX_INVERT_OWORD(temp); |
1864 | efx_writeo(efx, &temp, FR_AZ_FATAL_INTR_KER); | |
1865 | ||
765c9f46 | 1866 | efx_nic_push_rx_indir_table(efx); |
8e730c15 BH |
1867 | |
1868 | /* Disable the ugly timer-based TX DMA backoff and allow TX DMA to be | |
1869 | * controlled by the RX FIFO fill level. Set arbitration to one pkt/Q. | |
1870 | */ | |
1871 | efx_reado(efx, &temp, FR_AZ_TX_RESERVED); | |
1872 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_RX_SPACER, 0xfe); | |
1873 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_RX_SPACER_EN, 1); | |
1874 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_ONE_PKT_PER_Q, 1); | |
cd38557d | 1875 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PUSH_EN, 1); |
8e730c15 BH |
1876 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_DIS_NON_IP_EV, 1); |
1877 | /* Enable SW_EV to inherit in char driver - assume harmless here */ | |
1878 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_SOFT_EVT_EN, 1); | |
1879 | /* Prefetch threshold 2 => fetch when descriptor cache half empty */ | |
1880 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PREF_THRESHOLD, 2); | |
286d47ba BH |
1881 | /* Disable hardware watchdog which can misfire */ |
1882 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PREF_WD_TMR, 0x3fffff); | |
8e730c15 BH |
1883 | /* Squash TX of packets of 16 bytes or less */ |
1884 | if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) | |
1885 | EFX_SET_OWORD_FIELD(temp, FRF_BZ_TX_FLUSH_MIN_LEN_EN, 1); | |
1886 | efx_writeo(efx, &temp, FR_AZ_TX_RESERVED); | |
94b274bf BH |
1887 | |
1888 | if (efx_nic_rev(efx) >= EFX_REV_FALCON_B0) { | |
1889 | EFX_POPULATE_OWORD_4(temp, | |
1890 | /* Default values */ | |
1891 | FRF_BZ_TX_PACE_SB_NOT_AF, 0x15, | |
1892 | FRF_BZ_TX_PACE_SB_AF, 0xb, | |
1893 | FRF_BZ_TX_PACE_FB_BASE, 0, | |
1894 | /* Allow large pace values in the | |
1895 | * fast bin. */ | |
1896 | FRF_BZ_TX_PACE_BIN_TH, | |
1897 | FFE_BZ_TX_PACE_RESERVED); | |
1898 | efx_writeo(efx, &temp, FR_BZ_TX_PACE); | |
1899 | } | |
8e730c15 | 1900 | } |
5b98c1bf BH |
1901 | |
1902 | /* Register dump */ | |
1903 | ||
1904 | #define REGISTER_REVISION_A 1 | |
1905 | #define REGISTER_REVISION_B 2 | |
1906 | #define REGISTER_REVISION_C 3 | |
1907 | #define REGISTER_REVISION_Z 3 /* latest revision */ | |
1908 | ||
1909 | struct efx_nic_reg { | |
1910 | u32 offset:24; | |
1911 | u32 min_revision:2, max_revision:2; | |
1912 | }; | |
1913 | ||
1914 | #define REGISTER(name, min_rev, max_rev) { \ | |
1915 | FR_ ## min_rev ## max_rev ## _ ## name, \ | |
1916 | REGISTER_REVISION_ ## min_rev, REGISTER_REVISION_ ## max_rev \ | |
1917 | } | |
1918 | #define REGISTER_AA(name) REGISTER(name, A, A) | |
1919 | #define REGISTER_AB(name) REGISTER(name, A, B) | |
1920 | #define REGISTER_AZ(name) REGISTER(name, A, Z) | |
1921 | #define REGISTER_BB(name) REGISTER(name, B, B) | |
1922 | #define REGISTER_BZ(name) REGISTER(name, B, Z) | |
1923 | #define REGISTER_CZ(name) REGISTER(name, C, Z) | |
1924 | ||
1925 | static const struct efx_nic_reg efx_nic_regs[] = { | |
1926 | REGISTER_AZ(ADR_REGION), | |
1927 | REGISTER_AZ(INT_EN_KER), | |
1928 | REGISTER_BZ(INT_EN_CHAR), | |
1929 | REGISTER_AZ(INT_ADR_KER), | |
1930 | REGISTER_BZ(INT_ADR_CHAR), | |
1931 | /* INT_ACK_KER is WO */ | |
1932 | /* INT_ISR0 is RC */ | |
1933 | REGISTER_AZ(HW_INIT), | |
1934 | REGISTER_CZ(USR_EV_CFG), | |
1935 | REGISTER_AB(EE_SPI_HCMD), | |
1936 | REGISTER_AB(EE_SPI_HADR), | |
1937 | REGISTER_AB(EE_SPI_HDATA), | |
1938 | REGISTER_AB(EE_BASE_PAGE), | |
1939 | REGISTER_AB(EE_VPD_CFG0), | |
1940 | /* EE_VPD_SW_CNTL and EE_VPD_SW_DATA are not used */ | |
1941 | /* PMBX_DBG_IADDR and PBMX_DBG_IDATA are indirect */ | |
1942 | /* PCIE_CORE_INDIRECT is indirect */ | |
1943 | REGISTER_AB(NIC_STAT), | |
1944 | REGISTER_AB(GPIO_CTL), | |
1945 | REGISTER_AB(GLB_CTL), | |
1946 | /* FATAL_INTR_KER and FATAL_INTR_CHAR are partly RC */ | |
1947 | REGISTER_BZ(DP_CTRL), | |
1948 | REGISTER_AZ(MEM_STAT), | |
1949 | REGISTER_AZ(CS_DEBUG), | |
1950 | REGISTER_AZ(ALTERA_BUILD), | |
1951 | REGISTER_AZ(CSR_SPARE), | |
1952 | REGISTER_AB(PCIE_SD_CTL0123), | |
1953 | REGISTER_AB(PCIE_SD_CTL45), | |
1954 | REGISTER_AB(PCIE_PCS_CTL_STAT), | |
1955 | /* DEBUG_DATA_OUT is not used */ | |
1956 | /* DRV_EV is WO */ | |
1957 | REGISTER_AZ(EVQ_CTL), | |
1958 | REGISTER_AZ(EVQ_CNT1), | |
1959 | REGISTER_AZ(EVQ_CNT2), | |
1960 | REGISTER_AZ(BUF_TBL_CFG), | |
1961 | REGISTER_AZ(SRM_RX_DC_CFG), | |
1962 | REGISTER_AZ(SRM_TX_DC_CFG), | |
1963 | REGISTER_AZ(SRM_CFG), | |
1964 | /* BUF_TBL_UPD is WO */ | |
1965 | REGISTER_AZ(SRM_UPD_EVQ), | |
1966 | REGISTER_AZ(SRAM_PARITY), | |
1967 | REGISTER_AZ(RX_CFG), | |
1968 | REGISTER_BZ(RX_FILTER_CTL), | |
1969 | /* RX_FLUSH_DESCQ is WO */ | |
1970 | REGISTER_AZ(RX_DC_CFG), | |
1971 | REGISTER_AZ(RX_DC_PF_WM), | |
1972 | REGISTER_BZ(RX_RSS_TKEY), | |
1973 | /* RX_NODESC_DROP is RC */ | |
1974 | REGISTER_AA(RX_SELF_RST), | |
1975 | /* RX_DEBUG, RX_PUSH_DROP are not used */ | |
1976 | REGISTER_CZ(RX_RSS_IPV6_REG1), | |
1977 | REGISTER_CZ(RX_RSS_IPV6_REG2), | |
1978 | REGISTER_CZ(RX_RSS_IPV6_REG3), | |
1979 | /* TX_FLUSH_DESCQ is WO */ | |
1980 | REGISTER_AZ(TX_DC_CFG), | |
1981 | REGISTER_AA(TX_CHKSM_CFG), | |
1982 | REGISTER_AZ(TX_CFG), | |
1983 | /* TX_PUSH_DROP is not used */ | |
1984 | REGISTER_AZ(TX_RESERVED), | |
1985 | REGISTER_BZ(TX_PACE), | |
1986 | /* TX_PACE_DROP_QID is RC */ | |
1987 | REGISTER_BB(TX_VLAN), | |
1988 | REGISTER_BZ(TX_IPFIL_PORTEN), | |
1989 | REGISTER_AB(MD_TXD), | |
1990 | REGISTER_AB(MD_RXD), | |
1991 | REGISTER_AB(MD_CS), | |
1992 | REGISTER_AB(MD_PHY_ADR), | |
1993 | REGISTER_AB(MD_ID), | |
1994 | /* MD_STAT is RC */ | |
1995 | REGISTER_AB(MAC_STAT_DMA), | |
1996 | REGISTER_AB(MAC_CTRL), | |
1997 | REGISTER_BB(GEN_MODE), | |
1998 | REGISTER_AB(MAC_MC_HASH_REG0), | |
1999 | REGISTER_AB(MAC_MC_HASH_REG1), | |
2000 | REGISTER_AB(GM_CFG1), | |
2001 | REGISTER_AB(GM_CFG2), | |
2002 | /* GM_IPG and GM_HD are not used */ | |
2003 | REGISTER_AB(GM_MAX_FLEN), | |
2004 | /* GM_TEST is not used */ | |
2005 | REGISTER_AB(GM_ADR1), | |
2006 | REGISTER_AB(GM_ADR2), | |
2007 | REGISTER_AB(GMF_CFG0), | |
2008 | REGISTER_AB(GMF_CFG1), | |
2009 | REGISTER_AB(GMF_CFG2), | |
2010 | REGISTER_AB(GMF_CFG3), | |
2011 | REGISTER_AB(GMF_CFG4), | |
2012 | REGISTER_AB(GMF_CFG5), | |
2013 | REGISTER_BB(TX_SRC_MAC_CTL), | |
2014 | REGISTER_AB(XM_ADR_LO), | |
2015 | REGISTER_AB(XM_ADR_HI), | |
2016 | REGISTER_AB(XM_GLB_CFG), | |
2017 | REGISTER_AB(XM_TX_CFG), | |
2018 | REGISTER_AB(XM_RX_CFG), | |
2019 | REGISTER_AB(XM_MGT_INT_MASK), | |
2020 | REGISTER_AB(XM_FC), | |
2021 | REGISTER_AB(XM_PAUSE_TIME), | |
2022 | REGISTER_AB(XM_TX_PARAM), | |
2023 | REGISTER_AB(XM_RX_PARAM), | |
2024 | /* XM_MGT_INT_MSK (note no 'A') is RC */ | |
2025 | REGISTER_AB(XX_PWR_RST), | |
2026 | REGISTER_AB(XX_SD_CTL), | |
2027 | REGISTER_AB(XX_TXDRV_CTL), | |
2028 | /* XX_PRBS_CTL, XX_PRBS_CHK and XX_PRBS_ERR are not used */ | |
2029 | /* XX_CORE_STAT is partly RC */ | |
2030 | }; | |
2031 | ||
2032 | struct efx_nic_reg_table { | |
2033 | u32 offset:24; | |
2034 | u32 min_revision:2, max_revision:2; | |
2035 | u32 step:6, rows:21; | |
2036 | }; | |
2037 | ||
2038 | #define REGISTER_TABLE_DIMENSIONS(_, offset, min_rev, max_rev, step, rows) { \ | |
2039 | offset, \ | |
2040 | REGISTER_REVISION_ ## min_rev, REGISTER_REVISION_ ## max_rev, \ | |
2041 | step, rows \ | |
2042 | } | |
9c636baf | 2043 | #define REGISTER_TABLE(name, min_rev, max_rev) \ |
5b98c1bf BH |
2044 | REGISTER_TABLE_DIMENSIONS( \ |
2045 | name, FR_ ## min_rev ## max_rev ## _ ## name, \ | |
2046 | min_rev, max_rev, \ | |
2047 | FR_ ## min_rev ## max_rev ## _ ## name ## _STEP, \ | |
2048 | FR_ ## min_rev ## max_rev ## _ ## name ## _ROWS) | |
2049 | #define REGISTER_TABLE_AA(name) REGISTER_TABLE(name, A, A) | |
2050 | #define REGISTER_TABLE_AZ(name) REGISTER_TABLE(name, A, Z) | |
2051 | #define REGISTER_TABLE_BB(name) REGISTER_TABLE(name, B, B) | |
2052 | #define REGISTER_TABLE_BZ(name) REGISTER_TABLE(name, B, Z) | |
2053 | #define REGISTER_TABLE_BB_CZ(name) \ | |
2054 | REGISTER_TABLE_DIMENSIONS(name, FR_BZ_ ## name, B, B, \ | |
2055 | FR_BZ_ ## name ## _STEP, \ | |
2056 | FR_BB_ ## name ## _ROWS), \ | |
2057 | REGISTER_TABLE_DIMENSIONS(name, FR_BZ_ ## name, C, Z, \ | |
2058 | FR_BZ_ ## name ## _STEP, \ | |
2059 | FR_CZ_ ## name ## _ROWS) | |
2060 | #define REGISTER_TABLE_CZ(name) REGISTER_TABLE(name, C, Z) | |
2061 | ||
2062 | static const struct efx_nic_reg_table efx_nic_reg_tables[] = { | |
2063 | /* DRIVER is not used */ | |
2064 | /* EVQ_RPTR, TIMER_COMMAND, USR_EV and {RX,TX}_DESC_UPD are WO */ | |
2065 | REGISTER_TABLE_BB(TX_IPFIL_TBL), | |
2066 | REGISTER_TABLE_BB(TX_SRC_MAC_TBL), | |
2067 | REGISTER_TABLE_AA(RX_DESC_PTR_TBL_KER), | |
2068 | REGISTER_TABLE_BB_CZ(RX_DESC_PTR_TBL), | |
2069 | REGISTER_TABLE_AA(TX_DESC_PTR_TBL_KER), | |
2070 | REGISTER_TABLE_BB_CZ(TX_DESC_PTR_TBL), | |
2071 | REGISTER_TABLE_AA(EVQ_PTR_TBL_KER), | |
2072 | REGISTER_TABLE_BB_CZ(EVQ_PTR_TBL), | |
75abc51c | 2073 | /* We can't reasonably read all of the buffer table (up to 8MB!). |
5b98c1bf BH |
2074 | * However this driver will only use a few entries. Reading |
2075 | * 1K entries allows for some expansion of queue count and | |
2076 | * size before we need to change the version. */ | |
2077 | REGISTER_TABLE_DIMENSIONS(BUF_FULL_TBL_KER, FR_AA_BUF_FULL_TBL_KER, | |
2078 | A, A, 8, 1024), | |
2079 | REGISTER_TABLE_DIMENSIONS(BUF_FULL_TBL, FR_BZ_BUF_FULL_TBL, | |
2080 | B, Z, 8, 1024), | |
5b98c1bf BH |
2081 | REGISTER_TABLE_CZ(RX_MAC_FILTER_TBL0), |
2082 | REGISTER_TABLE_BB_CZ(TIMER_TBL), | |
2083 | REGISTER_TABLE_BB_CZ(TX_PACE_TBL), | |
2084 | REGISTER_TABLE_BZ(RX_INDIRECTION_TBL), | |
2085 | /* TX_FILTER_TBL0 is huge and not used by this driver */ | |
2086 | REGISTER_TABLE_CZ(TX_MAC_FILTER_TBL0), | |
2087 | REGISTER_TABLE_CZ(MC_TREG_SMEM), | |
2088 | /* MSIX_PBA_TABLE is not mapped */ | |
2089 | /* SRM_DBG is not mapped (and is redundant with BUF_FLL_TBL) */ | |
75abc51c | 2090 | REGISTER_TABLE_BZ(RX_FILTER_TBL0), |
5b98c1bf BH |
2091 | }; |
2092 | ||
2093 | size_t efx_nic_get_regs_len(struct efx_nic *efx) | |
2094 | { | |
2095 | const struct efx_nic_reg *reg; | |
2096 | const struct efx_nic_reg_table *table; | |
2097 | size_t len = 0; | |
2098 | ||
2099 | for (reg = efx_nic_regs; | |
2100 | reg < efx_nic_regs + ARRAY_SIZE(efx_nic_regs); | |
2101 | reg++) | |
2102 | if (efx->type->revision >= reg->min_revision && | |
2103 | efx->type->revision <= reg->max_revision) | |
2104 | len += sizeof(efx_oword_t); | |
2105 | ||
2106 | for (table = efx_nic_reg_tables; | |
2107 | table < efx_nic_reg_tables + ARRAY_SIZE(efx_nic_reg_tables); | |
2108 | table++) | |
2109 | if (efx->type->revision >= table->min_revision && | |
2110 | efx->type->revision <= table->max_revision) | |
2111 | len += table->rows * min_t(size_t, table->step, 16); | |
2112 | ||
2113 | return len; | |
2114 | } | |
2115 | ||
2116 | void efx_nic_get_regs(struct efx_nic *efx, void *buf) | |
2117 | { | |
2118 | const struct efx_nic_reg *reg; | |
2119 | const struct efx_nic_reg_table *table; | |
2120 | ||
2121 | for (reg = efx_nic_regs; | |
2122 | reg < efx_nic_regs + ARRAY_SIZE(efx_nic_regs); | |
2123 | reg++) { | |
2124 | if (efx->type->revision >= reg->min_revision && | |
2125 | efx->type->revision <= reg->max_revision) { | |
2126 | efx_reado(efx, (efx_oword_t *)buf, reg->offset); | |
2127 | buf += sizeof(efx_oword_t); | |
2128 | } | |
2129 | } | |
2130 | ||
2131 | for (table = efx_nic_reg_tables; | |
2132 | table < efx_nic_reg_tables + ARRAY_SIZE(efx_nic_reg_tables); | |
2133 | table++) { | |
2134 | size_t size, i; | |
2135 | ||
2136 | if (!(efx->type->revision >= table->min_revision && | |
2137 | efx->type->revision <= table->max_revision)) | |
2138 | continue; | |
2139 | ||
2140 | size = min_t(size_t, table->step, 16); | |
2141 | ||
2142 | for (i = 0; i < table->rows; i++) { | |
2143 | switch (table->step) { | |
778cdaf6 BH |
2144 | case 4: /* 32-bit SRAM */ |
2145 | efx_readd(efx, buf, table->offset + 4 * i); | |
5b98c1bf BH |
2146 | break; |
2147 | case 8: /* 64-bit SRAM */ | |
2148 | efx_sram_readq(efx, | |
2149 | efx->membase + table->offset, | |
2150 | buf, i); | |
2151 | break; | |
778cdaf6 | 2152 | case 16: /* 128-bit-readable register */ |
5b98c1bf BH |
2153 | efx_reado_table(efx, buf, table->offset, i); |
2154 | break; | |
2155 | case 32: /* 128-bit register, interleaved */ | |
2156 | efx_reado_table(efx, buf, table->offset, 2 * i); | |
2157 | break; | |
2158 | default: | |
2159 | WARN_ON(1); | |
2160 | return; | |
2161 | } | |
2162 | buf += size; | |
2163 | } | |
2164 | } | |
2165 | } |