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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
86094f7f | 2 | /**************************************************************************** |
f7a6d2c4 | 3 | * Driver for Solarflare network controllers and boards |
86094f7f | 4 | * Copyright 2005-2006 Fen Systems Ltd. |
f7a6d2c4 | 5 | * Copyright 2006-2013 Solarflare Communications Inc. |
86094f7f BH |
6 | */ |
7 | ||
8 | #include <linux/bitops.h> | |
9 | #include <linux/delay.h> | |
10 | #include <linux/interrupt.h> | |
11 | #include <linux/pci.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/seq_file.h> | |
964e6135 | 14 | #include <linux/crc32.h> |
86094f7f BH |
15 | #include "net_driver.h" |
16 | #include "bitfield.h" | |
17 | #include "efx.h" | |
18 | #include "nic.h" | |
19 | #include "farch_regs.h" | |
7fa8d547 SS |
20 | #include "sriov.h" |
21 | #include "siena_sriov.h" | |
86094f7f BH |
22 | #include "io.h" |
23 | #include "workarounds.h" | |
24 | ||
5a6681e2 | 25 | /* Falcon-architecture (SFC9000-family) support */ |
86094f7f BH |
26 | |
27 | /************************************************************************** | |
28 | * | |
29 | * Configurable values | |
30 | * | |
31 | ************************************************************************** | |
32 | */ | |
33 | ||
34 | /* This is set to 16 for a good reason. In summary, if larger than | |
35 | * 16, the descriptor cache holds more than a default socket | |
36 | * buffer's worth of packets (for UDP we can only have at most one | |
37 | * socket buffer's worth outstanding). This combined with the fact | |
38 | * that we only get 1 TX event per descriptor cache means the NIC | |
39 | * goes idle. | |
40 | */ | |
41 | #define TX_DC_ENTRIES 16 | |
42 | #define TX_DC_ENTRIES_ORDER 1 | |
43 | ||
44 | #define RX_DC_ENTRIES 64 | |
45 | #define RX_DC_ENTRIES_ORDER 3 | |
46 | ||
47 | /* If EFX_MAX_INT_ERRORS internal errors occur within | |
48 | * EFX_INT_ERROR_EXPIRE seconds, we consider the NIC broken and | |
49 | * disable it. | |
50 | */ | |
51 | #define EFX_INT_ERROR_EXPIRE 3600 | |
52 | #define EFX_MAX_INT_ERRORS 5 | |
53 | ||
54 | /* Depth of RX flush request fifo */ | |
55 | #define EFX_RX_FLUSH_COUNT 4 | |
56 | ||
57 | /* Driver generated events */ | |
58 | #define _EFX_CHANNEL_MAGIC_TEST 0x000101 | |
59 | #define _EFX_CHANNEL_MAGIC_FILL 0x000102 | |
60 | #define _EFX_CHANNEL_MAGIC_RX_DRAIN 0x000103 | |
61 | #define _EFX_CHANNEL_MAGIC_TX_DRAIN 0x000104 | |
62 | ||
63 | #define _EFX_CHANNEL_MAGIC(_code, _data) ((_code) << 8 | (_data)) | |
64 | #define _EFX_CHANNEL_MAGIC_CODE(_magic) ((_magic) >> 8) | |
65 | ||
66 | #define EFX_CHANNEL_MAGIC_TEST(_channel) \ | |
67 | _EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_TEST, (_channel)->channel) | |
68 | #define EFX_CHANNEL_MAGIC_FILL(_rx_queue) \ | |
69 | _EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_FILL, \ | |
70 | efx_rx_queue_index(_rx_queue)) | |
71 | #define EFX_CHANNEL_MAGIC_RX_DRAIN(_rx_queue) \ | |
72 | _EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_RX_DRAIN, \ | |
73 | efx_rx_queue_index(_rx_queue)) | |
74 | #define EFX_CHANNEL_MAGIC_TX_DRAIN(_tx_queue) \ | |
75 | _EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_TX_DRAIN, \ | |
76 | (_tx_queue)->queue) | |
77 | ||
78 | static void efx_farch_magic_event(struct efx_channel *channel, u32 magic); | |
79 | ||
80 | /************************************************************************** | |
81 | * | |
82 | * Hardware access | |
83 | * | |
84 | **************************************************************************/ | |
85 | ||
86 | static inline void efx_write_buf_tbl(struct efx_nic *efx, efx_qword_t *value, | |
87 | unsigned int index) | |
88 | { | |
89 | efx_sram_writeq(efx, efx->membase + efx->type->buf_tbl_base, | |
90 | value, index); | |
91 | } | |
92 | ||
93 | static bool efx_masked_compare_oword(const efx_oword_t *a, const efx_oword_t *b, | |
94 | const efx_oword_t *mask) | |
95 | { | |
96 | return ((a->u64[0] ^ b->u64[0]) & mask->u64[0]) || | |
97 | ((a->u64[1] ^ b->u64[1]) & mask->u64[1]); | |
98 | } | |
99 | ||
100 | int efx_farch_test_registers(struct efx_nic *efx, | |
101 | const struct efx_farch_register_test *regs, | |
102 | size_t n_regs) | |
103 | { | |
17471c7b AB |
104 | unsigned address = 0; |
105 | int i, j; | |
86094f7f BH |
106 | efx_oword_t mask, imask, original, reg, buf; |
107 | ||
108 | for (i = 0; i < n_regs; ++i) { | |
109 | address = regs[i].address; | |
110 | mask = imask = regs[i].mask; | |
111 | EFX_INVERT_OWORD(imask); | |
112 | ||
113 | efx_reado(efx, &original, address); | |
114 | ||
115 | /* bit sweep on and off */ | |
116 | for (j = 0; j < 128; j++) { | |
117 | if (!EFX_EXTRACT_OWORD32(mask, j, j)) | |
118 | continue; | |
119 | ||
120 | /* Test this testable bit can be set in isolation */ | |
121 | EFX_AND_OWORD(reg, original, mask); | |
122 | EFX_SET_OWORD32(reg, j, j, 1); | |
123 | ||
124 | efx_writeo(efx, ®, address); | |
125 | efx_reado(efx, &buf, address); | |
126 | ||
127 | if (efx_masked_compare_oword(®, &buf, &mask)) | |
128 | goto fail; | |
129 | ||
130 | /* Test this testable bit can be cleared in isolation */ | |
131 | EFX_OR_OWORD(reg, original, mask); | |
132 | EFX_SET_OWORD32(reg, j, j, 0); | |
133 | ||
134 | efx_writeo(efx, ®, address); | |
135 | efx_reado(efx, &buf, address); | |
136 | ||
137 | if (efx_masked_compare_oword(®, &buf, &mask)) | |
138 | goto fail; | |
139 | } | |
140 | ||
141 | efx_writeo(efx, &original, address); | |
142 | } | |
143 | ||
144 | return 0; | |
145 | ||
146 | fail: | |
147 | netif_err(efx, hw, efx->net_dev, | |
148 | "wrote "EFX_OWORD_FMT" read "EFX_OWORD_FMT | |
149 | " at address 0x%x mask "EFX_OWORD_FMT"\n", EFX_OWORD_VAL(reg), | |
150 | EFX_OWORD_VAL(buf), address, EFX_OWORD_VAL(mask)); | |
151 | return -EIO; | |
152 | } | |
153 | ||
154 | /************************************************************************** | |
155 | * | |
156 | * Special buffer handling | |
157 | * Special buffers are used for event queues and the TX and RX | |
158 | * descriptor rings. | |
159 | * | |
160 | *************************************************************************/ | |
161 | ||
162 | /* | |
163 | * Initialise a special buffer | |
164 | * | |
165 | * This will define a buffer (previously allocated via | |
166 | * efx_alloc_special_buffer()) in the buffer table, allowing | |
167 | * it to be used for event queues, descriptor rings etc. | |
168 | */ | |
169 | static void | |
170 | efx_init_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer) | |
171 | { | |
172 | efx_qword_t buf_desc; | |
173 | unsigned int index; | |
174 | dma_addr_t dma_addr; | |
175 | int i; | |
176 | ||
e01b16a7 | 177 | EFX_WARN_ON_PARANOID(!buffer->buf.addr); |
86094f7f BH |
178 | |
179 | /* Write buffer descriptors to NIC */ | |
180 | for (i = 0; i < buffer->entries; i++) { | |
181 | index = buffer->index + i; | |
182 | dma_addr = buffer->buf.dma_addr + (i * EFX_BUF_SIZE); | |
183 | netif_dbg(efx, probe, efx->net_dev, | |
184 | "mapping special buffer %d at %llx\n", | |
185 | index, (unsigned long long)dma_addr); | |
186 | EFX_POPULATE_QWORD_3(buf_desc, | |
187 | FRF_AZ_BUF_ADR_REGION, 0, | |
188 | FRF_AZ_BUF_ADR_FBUF, dma_addr >> 12, | |
189 | FRF_AZ_BUF_OWNER_ID_FBUF, 0); | |
190 | efx_write_buf_tbl(efx, &buf_desc, index); | |
191 | } | |
192 | } | |
193 | ||
194 | /* Unmaps a buffer and clears the buffer table entries */ | |
195 | static void | |
196 | efx_fini_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer) | |
197 | { | |
198 | efx_oword_t buf_tbl_upd; | |
199 | unsigned int start = buffer->index; | |
200 | unsigned int end = (buffer->index + buffer->entries - 1); | |
201 | ||
202 | if (!buffer->entries) | |
203 | return; | |
204 | ||
205 | netif_dbg(efx, hw, efx->net_dev, "unmapping special buffers %d-%d\n", | |
206 | buffer->index, buffer->index + buffer->entries - 1); | |
207 | ||
208 | EFX_POPULATE_OWORD_4(buf_tbl_upd, | |
209 | FRF_AZ_BUF_UPD_CMD, 0, | |
210 | FRF_AZ_BUF_CLR_CMD, 1, | |
211 | FRF_AZ_BUF_CLR_END_ID, end, | |
212 | FRF_AZ_BUF_CLR_START_ID, start); | |
213 | efx_writeo(efx, &buf_tbl_upd, FR_AZ_BUF_TBL_UPD); | |
214 | } | |
215 | ||
216 | /* | |
217 | * Allocate a new special buffer | |
218 | * | |
219 | * This allocates memory for a new buffer, clears it and allocates a | |
220 | * new buffer ID range. It does not write into the buffer table. | |
221 | * | |
222 | * This call will allocate 4KB buffers, since 8KB buffers can't be | |
223 | * used for event queues and descriptor rings. | |
224 | */ | |
225 | static int efx_alloc_special_buffer(struct efx_nic *efx, | |
226 | struct efx_special_buffer *buffer, | |
227 | unsigned int len) | |
228 | { | |
2dc313ec SS |
229 | #ifdef CONFIG_SFC_SRIOV |
230 | struct siena_nic_data *nic_data = efx->nic_data; | |
231 | #endif | |
86094f7f BH |
232 | len = ALIGN(len, EFX_BUF_SIZE); |
233 | ||
234 | if (efx_nic_alloc_buffer(efx, &buffer->buf, len, GFP_KERNEL)) | |
235 | return -ENOMEM; | |
236 | buffer->entries = len / EFX_BUF_SIZE; | |
237 | BUG_ON(buffer->buf.dma_addr & (EFX_BUF_SIZE - 1)); | |
238 | ||
239 | /* Select new buffer ID */ | |
240 | buffer->index = efx->next_buffer_table; | |
241 | efx->next_buffer_table += buffer->entries; | |
242 | #ifdef CONFIG_SFC_SRIOV | |
327c685e | 243 | BUG_ON(efx_siena_sriov_enabled(efx) && |
2dc313ec | 244 | nic_data->vf_buftbl_base < efx->next_buffer_table); |
86094f7f BH |
245 | #endif |
246 | ||
247 | netif_dbg(efx, probe, efx->net_dev, | |
248 | "allocating special buffers %d-%d at %llx+%x " | |
249 | "(virt %p phys %llx)\n", buffer->index, | |
250 | buffer->index + buffer->entries - 1, | |
251 | (u64)buffer->buf.dma_addr, len, | |
252 | buffer->buf.addr, (u64)virt_to_phys(buffer->buf.addr)); | |
253 | ||
254 | return 0; | |
255 | } | |
256 | ||
257 | static void | |
258 | efx_free_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer) | |
259 | { | |
260 | if (!buffer->buf.addr) | |
261 | return; | |
262 | ||
263 | netif_dbg(efx, hw, efx->net_dev, | |
264 | "deallocating special buffers %d-%d at %llx+%x " | |
265 | "(virt %p phys %llx)\n", buffer->index, | |
266 | buffer->index + buffer->entries - 1, | |
267 | (u64)buffer->buf.dma_addr, buffer->buf.len, | |
268 | buffer->buf.addr, (u64)virt_to_phys(buffer->buf.addr)); | |
269 | ||
270 | efx_nic_free_buffer(efx, &buffer->buf); | |
271 | buffer->entries = 0; | |
272 | } | |
273 | ||
274 | /************************************************************************** | |
275 | * | |
276 | * TX path | |
277 | * | |
278 | **************************************************************************/ | |
279 | ||
280 | /* This writes to the TX_DESC_WPTR; write pointer for TX descriptor ring */ | |
281 | static inline void efx_farch_notify_tx_desc(struct efx_tx_queue *tx_queue) | |
282 | { | |
283 | unsigned write_ptr; | |
284 | efx_dword_t reg; | |
285 | ||
286 | write_ptr = tx_queue->write_count & tx_queue->ptr_mask; | |
287 | EFX_POPULATE_DWORD_1(reg, FRF_AZ_TX_DESC_WPTR_DWORD, write_ptr); | |
288 | efx_writed_page(tx_queue->efx, ®, | |
289 | FR_AZ_TX_DESC_UPD_DWORD_P0, tx_queue->queue); | |
290 | } | |
291 | ||
292 | /* Write pointer and first descriptor for TX descriptor ring */ | |
293 | static inline void efx_farch_push_tx_desc(struct efx_tx_queue *tx_queue, | |
294 | const efx_qword_t *txd) | |
295 | { | |
296 | unsigned write_ptr; | |
297 | efx_oword_t reg; | |
298 | ||
299 | BUILD_BUG_ON(FRF_AZ_TX_DESC_LBN != 0); | |
300 | BUILD_BUG_ON(FR_AA_TX_DESC_UPD_KER != FR_BZ_TX_DESC_UPD_P0); | |
301 | ||
302 | write_ptr = tx_queue->write_count & tx_queue->ptr_mask; | |
303 | EFX_POPULATE_OWORD_2(reg, FRF_AZ_TX_DESC_PUSH_CMD, true, | |
304 | FRF_AZ_TX_DESC_WPTR, write_ptr); | |
305 | reg.qword[0] = *txd; | |
306 | efx_writeo_page(tx_queue->efx, ®, | |
307 | FR_BZ_TX_DESC_UPD_P0, tx_queue->queue); | |
308 | } | |
309 | ||
310 | ||
311 | /* For each entry inserted into the software descriptor ring, create a | |
312 | * descriptor in the hardware TX descriptor ring (in host memory), and | |
313 | * write a doorbell. | |
314 | */ | |
315 | void efx_farch_tx_write(struct efx_tx_queue *tx_queue) | |
316 | { | |
86094f7f BH |
317 | struct efx_tx_buffer *buffer; |
318 | efx_qword_t *txd; | |
319 | unsigned write_ptr; | |
320 | unsigned old_write_count = tx_queue->write_count; | |
321 | ||
b2663a4f MH |
322 | tx_queue->xmit_more_available = false; |
323 | if (unlikely(tx_queue->write_count == tx_queue->insert_count)) | |
324 | return; | |
86094f7f BH |
325 | |
326 | do { | |
327 | write_ptr = tx_queue->write_count & tx_queue->ptr_mask; | |
328 | buffer = &tx_queue->buffer[write_ptr]; | |
329 | txd = efx_tx_desc(tx_queue, write_ptr); | |
330 | ++tx_queue->write_count; | |
331 | ||
e01b16a7 | 332 | EFX_WARN_ON_ONCE_PARANOID(buffer->flags & EFX_TX_BUF_OPTION); |
ba8977bd | 333 | |
86094f7f BH |
334 | /* Create TX descriptor ring entry */ |
335 | BUILD_BUG_ON(EFX_TX_BUF_CONT != 1); | |
336 | EFX_POPULATE_QWORD_4(*txd, | |
337 | FSF_AZ_TX_KER_CONT, | |
338 | buffer->flags & EFX_TX_BUF_CONT, | |
339 | FSF_AZ_TX_KER_BYTE_COUNT, buffer->len, | |
340 | FSF_AZ_TX_KER_BUF_REGION, 0, | |
341 | FSF_AZ_TX_KER_BUF_ADDR, buffer->dma_addr); | |
342 | } while (tx_queue->write_count != tx_queue->insert_count); | |
343 | ||
344 | wmb(); /* Ensure descriptors are written before they are fetched */ | |
345 | ||
346 | if (efx_nic_may_push_tx_desc(tx_queue, old_write_count)) { | |
347 | txd = efx_tx_desc(tx_queue, | |
348 | old_write_count & tx_queue->ptr_mask); | |
349 | efx_farch_push_tx_desc(tx_queue, txd); | |
350 | ++tx_queue->pushes; | |
351 | } else { | |
352 | efx_farch_notify_tx_desc(tx_queue); | |
353 | } | |
354 | } | |
355 | ||
e9117e50 BK |
356 | unsigned int efx_farch_tx_limit_len(struct efx_tx_queue *tx_queue, |
357 | dma_addr_t dma_addr, unsigned int len) | |
358 | { | |
359 | /* Don't cross 4K boundaries with descriptors. */ | |
360 | unsigned int limit = (~dma_addr & (EFX_PAGE_SIZE - 1)) + 1; | |
361 | ||
362 | len = min(limit, len); | |
363 | ||
e9117e50 BK |
364 | return len; |
365 | } | |
366 | ||
367 | ||
86094f7f BH |
368 | /* Allocate hardware resources for a TX queue */ |
369 | int efx_farch_tx_probe(struct efx_tx_queue *tx_queue) | |
370 | { | |
371 | struct efx_nic *efx = tx_queue->efx; | |
372 | unsigned entries; | |
373 | ||
374 | entries = tx_queue->ptr_mask + 1; | |
375 | return efx_alloc_special_buffer(efx, &tx_queue->txd, | |
376 | entries * sizeof(efx_qword_t)); | |
377 | } | |
378 | ||
379 | void efx_farch_tx_init(struct efx_tx_queue *tx_queue) | |
380 | { | |
5a6681e2 | 381 | int csum = tx_queue->queue & EFX_TXQ_TYPE_OFFLOAD; |
86094f7f BH |
382 | struct efx_nic *efx = tx_queue->efx; |
383 | efx_oword_t reg; | |
384 | ||
385 | /* Pin TX descriptor ring */ | |
386 | efx_init_special_buffer(efx, &tx_queue->txd); | |
387 | ||
388 | /* Push TX descriptor ring to card */ | |
389 | EFX_POPULATE_OWORD_10(reg, | |
390 | FRF_AZ_TX_DESCQ_EN, 1, | |
391 | FRF_AZ_TX_ISCSI_DDIG_EN, 0, | |
392 | FRF_AZ_TX_ISCSI_HDIG_EN, 0, | |
393 | FRF_AZ_TX_DESCQ_BUF_BASE_ID, tx_queue->txd.index, | |
394 | FRF_AZ_TX_DESCQ_EVQ_ID, | |
395 | tx_queue->channel->channel, | |
396 | FRF_AZ_TX_DESCQ_OWNER_ID, 0, | |
397 | FRF_AZ_TX_DESCQ_LABEL, tx_queue->queue, | |
398 | FRF_AZ_TX_DESCQ_SIZE, | |
399 | __ffs(tx_queue->txd.entries), | |
400 | FRF_AZ_TX_DESCQ_TYPE, 0, | |
401 | FRF_BZ_TX_NON_IP_DROP_DIS, 1); | |
402 | ||
5a6681e2 EC |
403 | EFX_SET_OWORD_FIELD(reg, FRF_BZ_TX_IP_CHKSM_DIS, !csum); |
404 | EFX_SET_OWORD_FIELD(reg, FRF_BZ_TX_TCP_CHKSM_DIS, !csum); | |
86094f7f BH |
405 | |
406 | efx_writeo_table(efx, ®, efx->type->txd_ptr_tbl_base, | |
407 | tx_queue->queue); | |
408 | ||
5a6681e2 EC |
409 | EFX_POPULATE_OWORD_1(reg, |
410 | FRF_BZ_TX_PACE, | |
411 | (tx_queue->queue & EFX_TXQ_TYPE_HIGHPRI) ? | |
412 | FFE_BZ_TX_PACE_OFF : | |
413 | FFE_BZ_TX_PACE_RESERVED); | |
414 | efx_writeo_table(efx, ®, FR_BZ_TX_PACE_TBL, tx_queue->queue); | |
86094f7f BH |
415 | } |
416 | ||
417 | static void efx_farch_flush_tx_queue(struct efx_tx_queue *tx_queue) | |
418 | { | |
419 | struct efx_nic *efx = tx_queue->efx; | |
420 | efx_oword_t tx_flush_descq; | |
421 | ||
422 | WARN_ON(atomic_read(&tx_queue->flush_outstanding)); | |
423 | atomic_set(&tx_queue->flush_outstanding, 1); | |
424 | ||
425 | EFX_POPULATE_OWORD_2(tx_flush_descq, | |
426 | FRF_AZ_TX_FLUSH_DESCQ_CMD, 1, | |
427 | FRF_AZ_TX_FLUSH_DESCQ, tx_queue->queue); | |
428 | efx_writeo(efx, &tx_flush_descq, FR_AZ_TX_FLUSH_DESCQ); | |
429 | } | |
430 | ||
431 | void efx_farch_tx_fini(struct efx_tx_queue *tx_queue) | |
432 | { | |
433 | struct efx_nic *efx = tx_queue->efx; | |
434 | efx_oword_t tx_desc_ptr; | |
435 | ||
436 | /* Remove TX descriptor ring from card */ | |
437 | EFX_ZERO_OWORD(tx_desc_ptr); | |
438 | efx_writeo_table(efx, &tx_desc_ptr, efx->type->txd_ptr_tbl_base, | |
439 | tx_queue->queue); | |
440 | ||
441 | /* Unpin TX descriptor ring */ | |
442 | efx_fini_special_buffer(efx, &tx_queue->txd); | |
443 | } | |
444 | ||
445 | /* Free buffers backing TX queue */ | |
446 | void efx_farch_tx_remove(struct efx_tx_queue *tx_queue) | |
447 | { | |
448 | efx_free_special_buffer(tx_queue->efx, &tx_queue->txd); | |
449 | } | |
450 | ||
451 | /************************************************************************** | |
452 | * | |
453 | * RX path | |
454 | * | |
455 | **************************************************************************/ | |
456 | ||
457 | /* This creates an entry in the RX descriptor queue */ | |
458 | static inline void | |
459 | efx_farch_build_rx_desc(struct efx_rx_queue *rx_queue, unsigned index) | |
460 | { | |
461 | struct efx_rx_buffer *rx_buf; | |
462 | efx_qword_t *rxd; | |
463 | ||
464 | rxd = efx_rx_desc(rx_queue, index); | |
465 | rx_buf = efx_rx_buffer(rx_queue, index); | |
466 | EFX_POPULATE_QWORD_3(*rxd, | |
467 | FSF_AZ_RX_KER_BUF_SIZE, | |
468 | rx_buf->len - | |
469 | rx_queue->efx->type->rx_buffer_padding, | |
470 | FSF_AZ_RX_KER_BUF_REGION, 0, | |
471 | FSF_AZ_RX_KER_BUF_ADDR, rx_buf->dma_addr); | |
472 | } | |
473 | ||
474 | /* This writes to the RX_DESC_WPTR register for the specified receive | |
475 | * descriptor ring. | |
476 | */ | |
477 | void efx_farch_rx_write(struct efx_rx_queue *rx_queue) | |
478 | { | |
479 | struct efx_nic *efx = rx_queue->efx; | |
480 | efx_dword_t reg; | |
481 | unsigned write_ptr; | |
482 | ||
483 | while (rx_queue->notified_count != rx_queue->added_count) { | |
484 | efx_farch_build_rx_desc( | |
485 | rx_queue, | |
486 | rx_queue->notified_count & rx_queue->ptr_mask); | |
487 | ++rx_queue->notified_count; | |
488 | } | |
489 | ||
490 | wmb(); | |
491 | write_ptr = rx_queue->added_count & rx_queue->ptr_mask; | |
492 | EFX_POPULATE_DWORD_1(reg, FRF_AZ_RX_DESC_WPTR_DWORD, write_ptr); | |
493 | efx_writed_page(efx, ®, FR_AZ_RX_DESC_UPD_DWORD_P0, | |
494 | efx_rx_queue_index(rx_queue)); | |
495 | } | |
496 | ||
497 | int efx_farch_rx_probe(struct efx_rx_queue *rx_queue) | |
498 | { | |
499 | struct efx_nic *efx = rx_queue->efx; | |
500 | unsigned entries; | |
501 | ||
502 | entries = rx_queue->ptr_mask + 1; | |
503 | return efx_alloc_special_buffer(efx, &rx_queue->rxd, | |
504 | entries * sizeof(efx_qword_t)); | |
505 | } | |
506 | ||
507 | void efx_farch_rx_init(struct efx_rx_queue *rx_queue) | |
508 | { | |
509 | efx_oword_t rx_desc_ptr; | |
510 | struct efx_nic *efx = rx_queue->efx; | |
86094f7f BH |
511 | bool jumbo_en; |
512 | ||
5a6681e2 EC |
513 | /* For kernel-mode queues in Siena, the JUMBO flag enables scatter. */ |
514 | jumbo_en = efx->rx_scatter; | |
86094f7f BH |
515 | |
516 | netif_dbg(efx, hw, efx->net_dev, | |
517 | "RX queue %d ring in special buffers %d-%d\n", | |
518 | efx_rx_queue_index(rx_queue), rx_queue->rxd.index, | |
519 | rx_queue->rxd.index + rx_queue->rxd.entries - 1); | |
520 | ||
521 | rx_queue->scatter_n = 0; | |
522 | ||
523 | /* Pin RX descriptor ring */ | |
524 | efx_init_special_buffer(efx, &rx_queue->rxd); | |
525 | ||
526 | /* Push RX descriptor ring to card */ | |
527 | EFX_POPULATE_OWORD_10(rx_desc_ptr, | |
5a6681e2 EC |
528 | FRF_AZ_RX_ISCSI_DDIG_EN, true, |
529 | FRF_AZ_RX_ISCSI_HDIG_EN, true, | |
86094f7f BH |
530 | FRF_AZ_RX_DESCQ_BUF_BASE_ID, rx_queue->rxd.index, |
531 | FRF_AZ_RX_DESCQ_EVQ_ID, | |
532 | efx_rx_queue_channel(rx_queue)->channel, | |
533 | FRF_AZ_RX_DESCQ_OWNER_ID, 0, | |
534 | FRF_AZ_RX_DESCQ_LABEL, | |
535 | efx_rx_queue_index(rx_queue), | |
536 | FRF_AZ_RX_DESCQ_SIZE, | |
537 | __ffs(rx_queue->rxd.entries), | |
538 | FRF_AZ_RX_DESCQ_TYPE, 0 /* kernel queue */ , | |
539 | FRF_AZ_RX_DESCQ_JUMBO, jumbo_en, | |
540 | FRF_AZ_RX_DESCQ_EN, 1); | |
541 | efx_writeo_table(efx, &rx_desc_ptr, efx->type->rxd_ptr_tbl_base, | |
542 | efx_rx_queue_index(rx_queue)); | |
543 | } | |
544 | ||
545 | static void efx_farch_flush_rx_queue(struct efx_rx_queue *rx_queue) | |
546 | { | |
547 | struct efx_nic *efx = rx_queue->efx; | |
548 | efx_oword_t rx_flush_descq; | |
549 | ||
550 | EFX_POPULATE_OWORD_2(rx_flush_descq, | |
551 | FRF_AZ_RX_FLUSH_DESCQ_CMD, 1, | |
552 | FRF_AZ_RX_FLUSH_DESCQ, | |
553 | efx_rx_queue_index(rx_queue)); | |
554 | efx_writeo(efx, &rx_flush_descq, FR_AZ_RX_FLUSH_DESCQ); | |
555 | } | |
556 | ||
557 | void efx_farch_rx_fini(struct efx_rx_queue *rx_queue) | |
558 | { | |
559 | efx_oword_t rx_desc_ptr; | |
560 | struct efx_nic *efx = rx_queue->efx; | |
561 | ||
562 | /* Remove RX descriptor ring from card */ | |
563 | EFX_ZERO_OWORD(rx_desc_ptr); | |
564 | efx_writeo_table(efx, &rx_desc_ptr, efx->type->rxd_ptr_tbl_base, | |
565 | efx_rx_queue_index(rx_queue)); | |
566 | ||
567 | /* Unpin RX descriptor ring */ | |
568 | efx_fini_special_buffer(efx, &rx_queue->rxd); | |
569 | } | |
570 | ||
571 | /* Free buffers backing RX queue */ | |
572 | void efx_farch_rx_remove(struct efx_rx_queue *rx_queue) | |
573 | { | |
574 | efx_free_special_buffer(rx_queue->efx, &rx_queue->rxd); | |
575 | } | |
576 | ||
577 | /************************************************************************** | |
578 | * | |
579 | * Flush handling | |
580 | * | |
581 | **************************************************************************/ | |
582 | ||
583 | /* efx_farch_flush_queues() must be woken up when all flushes are completed, | |
584 | * or more RX flushes can be kicked off. | |
585 | */ | |
586 | static bool efx_farch_flush_wake(struct efx_nic *efx) | |
587 | { | |
588 | /* Ensure that all updates are visible to efx_farch_flush_queues() */ | |
589 | smp_mb(); | |
590 | ||
3881d8ab | 591 | return (atomic_read(&efx->active_queues) == 0 || |
86094f7f BH |
592 | (atomic_read(&efx->rxq_flush_outstanding) < EFX_RX_FLUSH_COUNT |
593 | && atomic_read(&efx->rxq_flush_pending) > 0)); | |
594 | } | |
595 | ||
596 | static bool efx_check_tx_flush_complete(struct efx_nic *efx) | |
597 | { | |
598 | bool i = true; | |
599 | efx_oword_t txd_ptr_tbl; | |
600 | struct efx_channel *channel; | |
601 | struct efx_tx_queue *tx_queue; | |
602 | ||
603 | efx_for_each_channel(channel, efx) { | |
604 | efx_for_each_channel_tx_queue(tx_queue, channel) { | |
605 | efx_reado_table(efx, &txd_ptr_tbl, | |
606 | FR_BZ_TX_DESC_PTR_TBL, tx_queue->queue); | |
607 | if (EFX_OWORD_FIELD(txd_ptr_tbl, | |
608 | FRF_AZ_TX_DESCQ_FLUSH) || | |
609 | EFX_OWORD_FIELD(txd_ptr_tbl, | |
610 | FRF_AZ_TX_DESCQ_EN)) { | |
611 | netif_dbg(efx, hw, efx->net_dev, | |
612 | "flush did not complete on TXQ %d\n", | |
613 | tx_queue->queue); | |
614 | i = false; | |
615 | } else if (atomic_cmpxchg(&tx_queue->flush_outstanding, | |
616 | 1, 0)) { | |
617 | /* The flush is complete, but we didn't | |
618 | * receive a flush completion event | |
619 | */ | |
620 | netif_dbg(efx, hw, efx->net_dev, | |
621 | "flush complete on TXQ %d, so drain " | |
622 | "the queue\n", tx_queue->queue); | |
3881d8ab | 623 | /* Don't need to increment active_queues as it |
86094f7f BH |
624 | * has already been incremented for the queues |
625 | * which did not drain | |
626 | */ | |
627 | efx_farch_magic_event(channel, | |
628 | EFX_CHANNEL_MAGIC_TX_DRAIN( | |
629 | tx_queue)); | |
630 | } | |
631 | } | |
632 | } | |
633 | ||
634 | return i; | |
635 | } | |
636 | ||
637 | /* Flush all the transmit queues, and continue flushing receive queues until | |
dbedd44e | 638 | * they're all flushed. Wait for the DRAIN events to be received so that there |
86094f7f BH |
639 | * are no more RX and TX events left on any channel. */ |
640 | static int efx_farch_do_flush(struct efx_nic *efx) | |
641 | { | |
642 | unsigned timeout = msecs_to_jiffies(5000); /* 5s for all flushes and drains */ | |
643 | struct efx_channel *channel; | |
644 | struct efx_rx_queue *rx_queue; | |
645 | struct efx_tx_queue *tx_queue; | |
646 | int rc = 0; | |
647 | ||
648 | efx_for_each_channel(channel, efx) { | |
649 | efx_for_each_channel_tx_queue(tx_queue, channel) { | |
86094f7f BH |
650 | efx_farch_flush_tx_queue(tx_queue); |
651 | } | |
652 | efx_for_each_channel_rx_queue(rx_queue, channel) { | |
86094f7f BH |
653 | rx_queue->flush_pending = true; |
654 | atomic_inc(&efx->rxq_flush_pending); | |
655 | } | |
656 | } | |
657 | ||
3881d8ab | 658 | while (timeout && atomic_read(&efx->active_queues) > 0) { |
86094f7f BH |
659 | /* If SRIOV is enabled, then offload receive queue flushing to |
660 | * the firmware (though we will still have to poll for | |
661 | * completion). If that fails, fall back to the old scheme. | |
662 | */ | |
327c685e | 663 | if (efx_siena_sriov_enabled(efx)) { |
86094f7f BH |
664 | rc = efx_mcdi_flush_rxqs(efx); |
665 | if (!rc) | |
666 | goto wait; | |
667 | } | |
668 | ||
669 | /* The hardware supports four concurrent rx flushes, each of | |
670 | * which may need to be retried if there is an outstanding | |
671 | * descriptor fetch | |
672 | */ | |
673 | efx_for_each_channel(channel, efx) { | |
674 | efx_for_each_channel_rx_queue(rx_queue, channel) { | |
675 | if (atomic_read(&efx->rxq_flush_outstanding) >= | |
676 | EFX_RX_FLUSH_COUNT) | |
677 | break; | |
678 | ||
679 | if (rx_queue->flush_pending) { | |
680 | rx_queue->flush_pending = false; | |
681 | atomic_dec(&efx->rxq_flush_pending); | |
682 | atomic_inc(&efx->rxq_flush_outstanding); | |
683 | efx_farch_flush_rx_queue(rx_queue); | |
684 | } | |
685 | } | |
686 | } | |
687 | ||
688 | wait: | |
689 | timeout = wait_event_timeout(efx->flush_wq, | |
690 | efx_farch_flush_wake(efx), | |
691 | timeout); | |
692 | } | |
693 | ||
3881d8ab | 694 | if (atomic_read(&efx->active_queues) && |
86094f7f BH |
695 | !efx_check_tx_flush_complete(efx)) { |
696 | netif_err(efx, hw, efx->net_dev, "failed to flush %d queues " | |
3881d8ab | 697 | "(rx %d+%d)\n", atomic_read(&efx->active_queues), |
86094f7f BH |
698 | atomic_read(&efx->rxq_flush_outstanding), |
699 | atomic_read(&efx->rxq_flush_pending)); | |
700 | rc = -ETIMEDOUT; | |
701 | ||
3881d8ab | 702 | atomic_set(&efx->active_queues, 0); |
86094f7f BH |
703 | atomic_set(&efx->rxq_flush_pending, 0); |
704 | atomic_set(&efx->rxq_flush_outstanding, 0); | |
705 | } | |
706 | ||
707 | return rc; | |
708 | } | |
709 | ||
710 | int efx_farch_fini_dmaq(struct efx_nic *efx) | |
711 | { | |
712 | struct efx_channel *channel; | |
713 | struct efx_tx_queue *tx_queue; | |
714 | struct efx_rx_queue *rx_queue; | |
715 | int rc = 0; | |
716 | ||
717 | /* Do not attempt to write to the NIC during EEH recovery */ | |
718 | if (efx->state != STATE_RECOVERY) { | |
719 | /* Only perform flush if DMA is enabled */ | |
720 | if (efx->pci_dev->is_busmaster) { | |
721 | efx->type->prepare_flush(efx); | |
722 | rc = efx_farch_do_flush(efx); | |
723 | efx->type->finish_flush(efx); | |
724 | } | |
725 | ||
726 | efx_for_each_channel(channel, efx) { | |
727 | efx_for_each_channel_rx_queue(rx_queue, channel) | |
728 | efx_farch_rx_fini(rx_queue); | |
729 | efx_for_each_channel_tx_queue(tx_queue, channel) | |
730 | efx_farch_tx_fini(tx_queue); | |
731 | } | |
732 | } | |
733 | ||
734 | return rc; | |
735 | } | |
736 | ||
e283546c EC |
737 | /* Reset queue and flush accounting after FLR |
738 | * | |
739 | * One possible cause of FLR recovery is that DMA may be failing (eg. if bus | |
740 | * mastering was disabled), in which case we don't receive (RXQ) flush | |
741 | * completion events. This means that efx->rxq_flush_outstanding remained at 4 | |
742 | * after the FLR; also, efx->active_queues was non-zero (as no flush completion | |
743 | * events were received, and we didn't go through efx_check_tx_flush_complete()) | |
744 | * If we don't fix this up, on the next call to efx_realloc_channels() we won't | |
745 | * flush any RX queues because efx->rxq_flush_outstanding is at the limit of 4 | |
746 | * for batched flush requests; and the efx->active_queues gets messed up because | |
747 | * we keep incrementing for the newly initialised queues, but it never went to | |
748 | * zero previously. Then we get a timeout every time we try to restart the | |
749 | * queues, as it doesn't go back to zero when we should be flushing the queues. | |
750 | */ | |
751 | void efx_farch_finish_flr(struct efx_nic *efx) | |
752 | { | |
753 | atomic_set(&efx->rxq_flush_pending, 0); | |
754 | atomic_set(&efx->rxq_flush_outstanding, 0); | |
755 | atomic_set(&efx->active_queues, 0); | |
756 | } | |
757 | ||
758 | ||
86094f7f BH |
759 | /************************************************************************** |
760 | * | |
761 | * Event queue processing | |
762 | * Event queues are processed by per-channel tasklets. | |
763 | * | |
764 | **************************************************************************/ | |
765 | ||
766 | /* Update a channel's event queue's read pointer (RPTR) register | |
767 | * | |
768 | * This writes the EVQ_RPTR_REG register for the specified channel's | |
769 | * event queue. | |
770 | */ | |
771 | void efx_farch_ev_read_ack(struct efx_channel *channel) | |
772 | { | |
773 | efx_dword_t reg; | |
774 | struct efx_nic *efx = channel->efx; | |
775 | ||
776 | EFX_POPULATE_DWORD_1(reg, FRF_AZ_EVQ_RPTR, | |
777 | channel->eventq_read_ptr & channel->eventq_mask); | |
778 | ||
779 | /* For Falcon A1, EVQ_RPTR_KER is documented as having a step size | |
780 | * of 4 bytes, but it is really 16 bytes just like later revisions. | |
781 | */ | |
782 | efx_writed(efx, ®, | |
783 | efx->type->evq_rptr_tbl_base + | |
784 | FR_BZ_EVQ_RPTR_STEP * channel->channel); | |
785 | } | |
786 | ||
787 | /* Use HW to insert a SW defined event */ | |
788 | void efx_farch_generate_event(struct efx_nic *efx, unsigned int evq, | |
789 | efx_qword_t *event) | |
790 | { | |
791 | efx_oword_t drv_ev_reg; | |
792 | ||
793 | BUILD_BUG_ON(FRF_AZ_DRV_EV_DATA_LBN != 0 || | |
794 | FRF_AZ_DRV_EV_DATA_WIDTH != 64); | |
795 | drv_ev_reg.u32[0] = event->u32[0]; | |
796 | drv_ev_reg.u32[1] = event->u32[1]; | |
797 | drv_ev_reg.u32[2] = 0; | |
798 | drv_ev_reg.u32[3] = 0; | |
799 | EFX_SET_OWORD_FIELD(drv_ev_reg, FRF_AZ_DRV_EV_QID, evq); | |
800 | efx_writeo(efx, &drv_ev_reg, FR_AZ_DRV_EV); | |
801 | } | |
802 | ||
803 | static void efx_farch_magic_event(struct efx_channel *channel, u32 magic) | |
804 | { | |
805 | efx_qword_t event; | |
806 | ||
807 | EFX_POPULATE_QWORD_2(event, FSF_AZ_EV_CODE, | |
808 | FSE_AZ_EV_CODE_DRV_GEN_EV, | |
809 | FSF_AZ_DRV_GEN_EV_MAGIC, magic); | |
810 | efx_farch_generate_event(channel->efx, channel->channel, &event); | |
811 | } | |
812 | ||
813 | /* Handle a transmit completion event | |
814 | * | |
815 | * The NIC batches TX completion events; the message we receive is of | |
816 | * the form "complete all TX events up to this index". | |
817 | */ | |
5227eccc | 818 | static void |
86094f7f BH |
819 | efx_farch_handle_tx_event(struct efx_channel *channel, efx_qword_t *event) |
820 | { | |
821 | unsigned int tx_ev_desc_ptr; | |
822 | unsigned int tx_ev_q_label; | |
823 | struct efx_tx_queue *tx_queue; | |
824 | struct efx_nic *efx = channel->efx; | |
86094f7f | 825 | |
6aa7de05 | 826 | if (unlikely(READ_ONCE(efx->reset_pending))) |
5227eccc | 827 | return; |
86094f7f BH |
828 | |
829 | if (likely(EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_COMP))) { | |
830 | /* Transmit completion */ | |
831 | tx_ev_desc_ptr = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_DESC_PTR); | |
832 | tx_ev_q_label = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_Q_LABEL); | |
833 | tx_queue = efx_channel_get_tx_queue( | |
834 | channel, tx_ev_q_label % EFX_TXQ_TYPES); | |
86094f7f BH |
835 | efx_xmit_done(tx_queue, tx_ev_desc_ptr); |
836 | } else if (EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_WQ_FF_FULL)) { | |
837 | /* Rewrite the FIFO write pointer */ | |
838 | tx_ev_q_label = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_Q_LABEL); | |
839 | tx_queue = efx_channel_get_tx_queue( | |
840 | channel, tx_ev_q_label % EFX_TXQ_TYPES); | |
841 | ||
842 | netif_tx_lock(efx->net_dev); | |
843 | efx_farch_notify_tx_desc(tx_queue); | |
844 | netif_tx_unlock(efx->net_dev); | |
ab3b8250 | 845 | } else if (EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_PKT_ERR)) { |
3de82b91 | 846 | efx_schedule_reset(efx, RESET_TYPE_DMA_ERROR); |
86094f7f BH |
847 | } else { |
848 | netif_err(efx, tx_err, efx->net_dev, | |
849 | "channel %d unexpected TX event " | |
850 | EFX_QWORD_FMT"\n", channel->channel, | |
851 | EFX_QWORD_VAL(*event)); | |
852 | } | |
86094f7f BH |
853 | } |
854 | ||
855 | /* Detect errors included in the rx_evt_pkt_ok bit. */ | |
856 | static u16 efx_farch_handle_rx_not_ok(struct efx_rx_queue *rx_queue, | |
857 | const efx_qword_t *event) | |
858 | { | |
859 | struct efx_channel *channel = efx_rx_queue_channel(rx_queue); | |
860 | struct efx_nic *efx = rx_queue->efx; | |
861 | bool rx_ev_buf_owner_id_err, rx_ev_ip_hdr_chksum_err; | |
862 | bool rx_ev_tcp_udp_chksum_err, rx_ev_eth_crc_err; | |
5a6681e2 | 863 | bool rx_ev_frm_trunc, rx_ev_tobe_disc; |
86094f7f BH |
864 | bool rx_ev_other_err, rx_ev_pause_frm; |
865 | bool rx_ev_hdr_type, rx_ev_mcast_pkt; | |
866 | unsigned rx_ev_pkt_type; | |
867 | ||
868 | rx_ev_hdr_type = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_HDR_TYPE); | |
869 | rx_ev_mcast_pkt = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_MCAST_PKT); | |
870 | rx_ev_tobe_disc = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_TOBE_DISC); | |
871 | rx_ev_pkt_type = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_PKT_TYPE); | |
872 | rx_ev_buf_owner_id_err = EFX_QWORD_FIELD(*event, | |
873 | FSF_AZ_RX_EV_BUF_OWNER_ID_ERR); | |
874 | rx_ev_ip_hdr_chksum_err = EFX_QWORD_FIELD(*event, | |
875 | FSF_AZ_RX_EV_IP_HDR_CHKSUM_ERR); | |
876 | rx_ev_tcp_udp_chksum_err = EFX_QWORD_FIELD(*event, | |
877 | FSF_AZ_RX_EV_TCP_UDP_CHKSUM_ERR); | |
878 | rx_ev_eth_crc_err = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_ETH_CRC_ERR); | |
879 | rx_ev_frm_trunc = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_FRM_TRUNC); | |
86094f7f BH |
880 | rx_ev_pause_frm = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_PAUSE_FRM_ERR); |
881 | ||
882 | /* Every error apart from tobe_disc and pause_frm */ | |
5a6681e2 | 883 | rx_ev_other_err = (rx_ev_tcp_udp_chksum_err | |
86094f7f BH |
884 | rx_ev_buf_owner_id_err | rx_ev_eth_crc_err | |
885 | rx_ev_frm_trunc | rx_ev_ip_hdr_chksum_err); | |
886 | ||
887 | /* Count errors that are not in MAC stats. Ignore expected | |
888 | * checksum errors during self-test. */ | |
889 | if (rx_ev_frm_trunc) | |
890 | ++channel->n_rx_frm_trunc; | |
891 | else if (rx_ev_tobe_disc) | |
892 | ++channel->n_rx_tobe_disc; | |
893 | else if (!efx->loopback_selftest) { | |
894 | if (rx_ev_ip_hdr_chksum_err) | |
895 | ++channel->n_rx_ip_hdr_chksum_err; | |
896 | else if (rx_ev_tcp_udp_chksum_err) | |
897 | ++channel->n_rx_tcp_udp_chksum_err; | |
898 | } | |
899 | ||
900 | /* TOBE_DISC is expected on unicast mismatches; don't print out an | |
901 | * error message. FRM_TRUNC indicates RXDP dropped the packet due | |
902 | * to a FIFO overflow. | |
903 | */ | |
904 | #ifdef DEBUG | |
905 | if (rx_ev_other_err && net_ratelimit()) { | |
906 | netif_dbg(efx, rx_err, efx->net_dev, | |
907 | " RX queue %d unexpected RX event " | |
edd96fa0 | 908 | EFX_QWORD_FMT "%s%s%s%s%s%s%s\n", |
86094f7f BH |
909 | efx_rx_queue_index(rx_queue), EFX_QWORD_VAL(*event), |
910 | rx_ev_buf_owner_id_err ? " [OWNER_ID_ERR]" : "", | |
911 | rx_ev_ip_hdr_chksum_err ? | |
912 | " [IP_HDR_CHKSUM_ERR]" : "", | |
913 | rx_ev_tcp_udp_chksum_err ? | |
914 | " [TCP_UDP_CHKSUM_ERR]" : "", | |
915 | rx_ev_eth_crc_err ? " [ETH_CRC_ERR]" : "", | |
916 | rx_ev_frm_trunc ? " [FRM_TRUNC]" : "", | |
86094f7f BH |
917 | rx_ev_tobe_disc ? " [TOBE_DISC]" : "", |
918 | rx_ev_pause_frm ? " [PAUSE]" : ""); | |
919 | } | |
920 | #endif | |
921 | ||
6978729f EC |
922 | if (efx->net_dev->features & NETIF_F_RXALL) |
923 | /* don't discard frame for CRC error */ | |
924 | rx_ev_eth_crc_err = false; | |
925 | ||
86094f7f | 926 | /* The frame must be discarded if any of these are true. */ |
5a6681e2 | 927 | return (rx_ev_eth_crc_err | rx_ev_frm_trunc | |
86094f7f BH |
928 | rx_ev_tobe_disc | rx_ev_pause_frm) ? |
929 | EFX_RX_PKT_DISCARD : 0; | |
930 | } | |
931 | ||
932 | /* Handle receive events that are not in-order. Return true if this | |
933 | * can be handled as a partial packet discard, false if it's more | |
934 | * serious. | |
935 | */ | |
936 | static bool | |
937 | efx_farch_handle_rx_bad_index(struct efx_rx_queue *rx_queue, unsigned index) | |
938 | { | |
939 | struct efx_channel *channel = efx_rx_queue_channel(rx_queue); | |
940 | struct efx_nic *efx = rx_queue->efx; | |
941 | unsigned expected, dropped; | |
942 | ||
943 | if (rx_queue->scatter_n && | |
944 | index == ((rx_queue->removed_count + rx_queue->scatter_n - 1) & | |
945 | rx_queue->ptr_mask)) { | |
946 | ++channel->n_rx_nodesc_trunc; | |
947 | return true; | |
948 | } | |
949 | ||
950 | expected = rx_queue->removed_count & rx_queue->ptr_mask; | |
951 | dropped = (index - expected) & rx_queue->ptr_mask; | |
952 | netif_info(efx, rx_err, efx->net_dev, | |
953 | "dropped %d events (index=%d expected=%d)\n", | |
954 | dropped, index, expected); | |
955 | ||
5a6681e2 | 956 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); |
86094f7f BH |
957 | return false; |
958 | } | |
959 | ||
960 | /* Handle a packet received event | |
961 | * | |
962 | * The NIC gives a "discard" flag if it's a unicast packet with the | |
963 | * wrong destination address | |
964 | * Also "is multicast" and "matches multicast filter" flags can be used to | |
965 | * discard non-matching multicast packets. | |
966 | */ | |
967 | static void | |
968 | efx_farch_handle_rx_event(struct efx_channel *channel, const efx_qword_t *event) | |
969 | { | |
970 | unsigned int rx_ev_desc_ptr, rx_ev_byte_cnt; | |
971 | unsigned int rx_ev_hdr_type, rx_ev_mcast_pkt; | |
972 | unsigned expected_ptr; | |
973 | bool rx_ev_pkt_ok, rx_ev_sop, rx_ev_cont; | |
974 | u16 flags; | |
975 | struct efx_rx_queue *rx_queue; | |
976 | struct efx_nic *efx = channel->efx; | |
977 | ||
6aa7de05 | 978 | if (unlikely(READ_ONCE(efx->reset_pending))) |
86094f7f BH |
979 | return; |
980 | ||
981 | rx_ev_cont = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_JUMBO_CONT); | |
982 | rx_ev_sop = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_SOP); | |
983 | WARN_ON(EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_Q_LABEL) != | |
984 | channel->channel); | |
985 | ||
986 | rx_queue = efx_channel_get_rx_queue(channel); | |
987 | ||
988 | rx_ev_desc_ptr = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_DESC_PTR); | |
989 | expected_ptr = ((rx_queue->removed_count + rx_queue->scatter_n) & | |
990 | rx_queue->ptr_mask); | |
991 | ||
992 | /* Check for partial drops and other errors */ | |
993 | if (unlikely(rx_ev_desc_ptr != expected_ptr) || | |
994 | unlikely(rx_ev_sop != (rx_queue->scatter_n == 0))) { | |
995 | if (rx_ev_desc_ptr != expected_ptr && | |
996 | !efx_farch_handle_rx_bad_index(rx_queue, rx_ev_desc_ptr)) | |
997 | return; | |
998 | ||
999 | /* Discard all pending fragments */ | |
1000 | if (rx_queue->scatter_n) { | |
1001 | efx_rx_packet( | |
1002 | rx_queue, | |
1003 | rx_queue->removed_count & rx_queue->ptr_mask, | |
1004 | rx_queue->scatter_n, 0, EFX_RX_PKT_DISCARD); | |
1005 | rx_queue->removed_count += rx_queue->scatter_n; | |
1006 | rx_queue->scatter_n = 0; | |
1007 | } | |
1008 | ||
1009 | /* Return if there is no new fragment */ | |
1010 | if (rx_ev_desc_ptr != expected_ptr) | |
1011 | return; | |
1012 | ||
1013 | /* Discard new fragment if not SOP */ | |
1014 | if (!rx_ev_sop) { | |
1015 | efx_rx_packet( | |
1016 | rx_queue, | |
1017 | rx_queue->removed_count & rx_queue->ptr_mask, | |
1018 | 1, 0, EFX_RX_PKT_DISCARD); | |
1019 | ++rx_queue->removed_count; | |
1020 | return; | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | ++rx_queue->scatter_n; | |
1025 | if (rx_ev_cont) | |
1026 | return; | |
1027 | ||
1028 | rx_ev_byte_cnt = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_BYTE_CNT); | |
1029 | rx_ev_pkt_ok = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_PKT_OK); | |
1030 | rx_ev_hdr_type = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_HDR_TYPE); | |
1031 | ||
1032 | if (likely(rx_ev_pkt_ok)) { | |
1033 | /* If packet is marked as OK then we can rely on the | |
1034 | * hardware checksum and classification. | |
1035 | */ | |
1036 | flags = 0; | |
1037 | switch (rx_ev_hdr_type) { | |
1038 | case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_TCP: | |
1039 | flags |= EFX_RX_PKT_TCP; | |
1040 | /* fall through */ | |
1041 | case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_UDP: | |
1042 | flags |= EFX_RX_PKT_CSUMMED; | |
1043 | /* fall through */ | |
1044 | case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_OTHER: | |
1045 | case FSE_AZ_RX_EV_HDR_TYPE_OTHER: | |
1046 | break; | |
1047 | } | |
1048 | } else { | |
1049 | flags = efx_farch_handle_rx_not_ok(rx_queue, event); | |
1050 | } | |
1051 | ||
1052 | /* Detect multicast packets that didn't match the filter */ | |
1053 | rx_ev_mcast_pkt = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_MCAST_PKT); | |
1054 | if (rx_ev_mcast_pkt) { | |
1055 | unsigned int rx_ev_mcast_hash_match = | |
1056 | EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_MCAST_HASH_MATCH); | |
1057 | ||
1058 | if (unlikely(!rx_ev_mcast_hash_match)) { | |
1059 | ++channel->n_rx_mcast_mismatch; | |
1060 | flags |= EFX_RX_PKT_DISCARD; | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | channel->irq_mod_score += 2; | |
1065 | ||
1066 | /* Handle received packet */ | |
1067 | efx_rx_packet(rx_queue, | |
1068 | rx_queue->removed_count & rx_queue->ptr_mask, | |
1069 | rx_queue->scatter_n, rx_ev_byte_cnt, flags); | |
1070 | rx_queue->removed_count += rx_queue->scatter_n; | |
1071 | rx_queue->scatter_n = 0; | |
1072 | } | |
1073 | ||
1074 | /* If this flush done event corresponds to a &struct efx_tx_queue, then | |
1075 | * send an %EFX_CHANNEL_MAGIC_TX_DRAIN event to drain the event queue | |
1076 | * of all transmit completions. | |
1077 | */ | |
1078 | static void | |
1079 | efx_farch_handle_tx_flush_done(struct efx_nic *efx, efx_qword_t *event) | |
1080 | { | |
1081 | struct efx_tx_queue *tx_queue; | |
1082 | int qid; | |
1083 | ||
1084 | qid = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_SUBDATA); | |
2935e3c3 | 1085 | if (qid < EFX_TXQ_TYPES * (efx->n_tx_channels + efx->n_extra_tx_channels)) { |
86094f7f BH |
1086 | tx_queue = efx_get_tx_queue(efx, qid / EFX_TXQ_TYPES, |
1087 | qid % EFX_TXQ_TYPES); | |
1088 | if (atomic_cmpxchg(&tx_queue->flush_outstanding, 1, 0)) { | |
1089 | efx_farch_magic_event(tx_queue->channel, | |
1090 | EFX_CHANNEL_MAGIC_TX_DRAIN(tx_queue)); | |
1091 | } | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | /* If this flush done event corresponds to a &struct efx_rx_queue: If the flush | |
dbedd44e | 1096 | * was successful then send an %EFX_CHANNEL_MAGIC_RX_DRAIN, otherwise add |
86094f7f BH |
1097 | * the RX queue back to the mask of RX queues in need of flushing. |
1098 | */ | |
1099 | static void | |
1100 | efx_farch_handle_rx_flush_done(struct efx_nic *efx, efx_qword_t *event) | |
1101 | { | |
1102 | struct efx_channel *channel; | |
1103 | struct efx_rx_queue *rx_queue; | |
1104 | int qid; | |
1105 | bool failed; | |
1106 | ||
1107 | qid = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_RX_DESCQ_ID); | |
1108 | failed = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_RX_FLUSH_FAIL); | |
1109 | if (qid >= efx->n_channels) | |
1110 | return; | |
1111 | channel = efx_get_channel(efx, qid); | |
1112 | if (!efx_channel_has_rx_queue(channel)) | |
1113 | return; | |
1114 | rx_queue = efx_channel_get_rx_queue(channel); | |
1115 | ||
1116 | if (failed) { | |
1117 | netif_info(efx, hw, efx->net_dev, | |
1118 | "RXQ %d flush retry\n", qid); | |
1119 | rx_queue->flush_pending = true; | |
1120 | atomic_inc(&efx->rxq_flush_pending); | |
1121 | } else { | |
1122 | efx_farch_magic_event(efx_rx_queue_channel(rx_queue), | |
1123 | EFX_CHANNEL_MAGIC_RX_DRAIN(rx_queue)); | |
1124 | } | |
1125 | atomic_dec(&efx->rxq_flush_outstanding); | |
1126 | if (efx_farch_flush_wake(efx)) | |
1127 | wake_up(&efx->flush_wq); | |
1128 | } | |
1129 | ||
1130 | static void | |
1131 | efx_farch_handle_drain_event(struct efx_channel *channel) | |
1132 | { | |
1133 | struct efx_nic *efx = channel->efx; | |
1134 | ||
3881d8ab AR |
1135 | WARN_ON(atomic_read(&efx->active_queues) == 0); |
1136 | atomic_dec(&efx->active_queues); | |
86094f7f BH |
1137 | if (efx_farch_flush_wake(efx)) |
1138 | wake_up(&efx->flush_wq); | |
1139 | } | |
1140 | ||
1141 | static void efx_farch_handle_generated_event(struct efx_channel *channel, | |
1142 | efx_qword_t *event) | |
1143 | { | |
1144 | struct efx_nic *efx = channel->efx; | |
1145 | struct efx_rx_queue *rx_queue = | |
1146 | efx_channel_has_rx_queue(channel) ? | |
1147 | efx_channel_get_rx_queue(channel) : NULL; | |
1148 | unsigned magic, code; | |
1149 | ||
1150 | magic = EFX_QWORD_FIELD(*event, FSF_AZ_DRV_GEN_EV_MAGIC); | |
1151 | code = _EFX_CHANNEL_MAGIC_CODE(magic); | |
1152 | ||
1153 | if (magic == EFX_CHANNEL_MAGIC_TEST(channel)) { | |
1154 | channel->event_test_cpu = raw_smp_processor_id(); | |
1155 | } else if (rx_queue && magic == EFX_CHANNEL_MAGIC_FILL(rx_queue)) { | |
1156 | /* The queue must be empty, so we won't receive any rx | |
1157 | * events, so efx_process_channel() won't refill the | |
1158 | * queue. Refill it here */ | |
cce28794 | 1159 | efx_fast_push_rx_descriptors(rx_queue, true); |
86094f7f BH |
1160 | } else if (rx_queue && magic == EFX_CHANNEL_MAGIC_RX_DRAIN(rx_queue)) { |
1161 | efx_farch_handle_drain_event(channel); | |
1162 | } else if (code == _EFX_CHANNEL_MAGIC_TX_DRAIN) { | |
1163 | efx_farch_handle_drain_event(channel); | |
1164 | } else { | |
1165 | netif_dbg(efx, hw, efx->net_dev, "channel %d received " | |
1166 | "generated event "EFX_QWORD_FMT"\n", | |
1167 | channel->channel, EFX_QWORD_VAL(*event)); | |
1168 | } | |
1169 | } | |
1170 | ||
1171 | static void | |
1172 | efx_farch_handle_driver_event(struct efx_channel *channel, efx_qword_t *event) | |
1173 | { | |
1174 | struct efx_nic *efx = channel->efx; | |
1175 | unsigned int ev_sub_code; | |
1176 | unsigned int ev_sub_data; | |
1177 | ||
1178 | ev_sub_code = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_SUBCODE); | |
1179 | ev_sub_data = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_SUBDATA); | |
1180 | ||
1181 | switch (ev_sub_code) { | |
1182 | case FSE_AZ_TX_DESCQ_FLS_DONE_EV: | |
1183 | netif_vdbg(efx, hw, efx->net_dev, "channel %d TXQ %d flushed\n", | |
1184 | channel->channel, ev_sub_data); | |
1185 | efx_farch_handle_tx_flush_done(efx, event); | |
7fa8d547 | 1186 | #ifdef CONFIG_SFC_SRIOV |
327c685e | 1187 | efx_siena_sriov_tx_flush_done(efx, event); |
7fa8d547 | 1188 | #endif |
86094f7f BH |
1189 | break; |
1190 | case FSE_AZ_RX_DESCQ_FLS_DONE_EV: | |
1191 | netif_vdbg(efx, hw, efx->net_dev, "channel %d RXQ %d flushed\n", | |
1192 | channel->channel, ev_sub_data); | |
1193 | efx_farch_handle_rx_flush_done(efx, event); | |
7fa8d547 | 1194 | #ifdef CONFIG_SFC_SRIOV |
327c685e | 1195 | efx_siena_sriov_rx_flush_done(efx, event); |
7fa8d547 | 1196 | #endif |
86094f7f BH |
1197 | break; |
1198 | case FSE_AZ_EVQ_INIT_DONE_EV: | |
1199 | netif_dbg(efx, hw, efx->net_dev, | |
1200 | "channel %d EVQ %d initialised\n", | |
1201 | channel->channel, ev_sub_data); | |
1202 | break; | |
1203 | case FSE_AZ_SRM_UPD_DONE_EV: | |
1204 | netif_vdbg(efx, hw, efx->net_dev, | |
1205 | "channel %d SRAM update done\n", channel->channel); | |
1206 | break; | |
1207 | case FSE_AZ_WAKE_UP_EV: | |
1208 | netif_vdbg(efx, hw, efx->net_dev, | |
1209 | "channel %d RXQ %d wakeup event\n", | |
1210 | channel->channel, ev_sub_data); | |
1211 | break; | |
1212 | case FSE_AZ_TIMER_EV: | |
1213 | netif_vdbg(efx, hw, efx->net_dev, | |
1214 | "channel %d RX queue %d timer expired\n", | |
1215 | channel->channel, ev_sub_data); | |
1216 | break; | |
1217 | case FSE_AA_RX_RECOVER_EV: | |
1218 | netif_err(efx, rx_err, efx->net_dev, | |
1219 | "channel %d seen DRIVER RX_RESET event. " | |
1220 | "Resetting.\n", channel->channel); | |
1221 | atomic_inc(&efx->rx_reset); | |
5a6681e2 | 1222 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); |
86094f7f BH |
1223 | break; |
1224 | case FSE_BZ_RX_DSC_ERROR_EV: | |
1225 | if (ev_sub_data < EFX_VI_BASE) { | |
1226 | netif_err(efx, rx_err, efx->net_dev, | |
1227 | "RX DMA Q %d reports descriptor fetch error." | |
1228 | " RX Q %d is disabled.\n", ev_sub_data, | |
1229 | ev_sub_data); | |
3de82b91 | 1230 | efx_schedule_reset(efx, RESET_TYPE_DMA_ERROR); |
7fa8d547 SS |
1231 | } |
1232 | #ifdef CONFIG_SFC_SRIOV | |
1233 | else | |
327c685e | 1234 | efx_siena_sriov_desc_fetch_err(efx, ev_sub_data); |
7fa8d547 | 1235 | #endif |
86094f7f BH |
1236 | break; |
1237 | case FSE_BZ_TX_DSC_ERROR_EV: | |
1238 | if (ev_sub_data < EFX_VI_BASE) { | |
1239 | netif_err(efx, tx_err, efx->net_dev, | |
1240 | "TX DMA Q %d reports descriptor fetch error." | |
1241 | " TX Q %d is disabled.\n", ev_sub_data, | |
1242 | ev_sub_data); | |
3de82b91 | 1243 | efx_schedule_reset(efx, RESET_TYPE_DMA_ERROR); |
7fa8d547 SS |
1244 | } |
1245 | #ifdef CONFIG_SFC_SRIOV | |
1246 | else | |
327c685e | 1247 | efx_siena_sriov_desc_fetch_err(efx, ev_sub_data); |
7fa8d547 | 1248 | #endif |
86094f7f BH |
1249 | break; |
1250 | default: | |
1251 | netif_vdbg(efx, hw, efx->net_dev, | |
1252 | "channel %d unknown driver event code %d " | |
1253 | "data %04x\n", channel->channel, ev_sub_code, | |
1254 | ev_sub_data); | |
1255 | break; | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | int efx_farch_ev_process(struct efx_channel *channel, int budget) | |
1260 | { | |
1261 | struct efx_nic *efx = channel->efx; | |
1262 | unsigned int read_ptr; | |
1263 | efx_qword_t event, *p_event; | |
1264 | int ev_code; | |
86094f7f BH |
1265 | int spent = 0; |
1266 | ||
75363a46 EB |
1267 | if (budget <= 0) |
1268 | return spent; | |
1269 | ||
86094f7f BH |
1270 | read_ptr = channel->eventq_read_ptr; |
1271 | ||
1272 | for (;;) { | |
1273 | p_event = efx_event(channel, read_ptr); | |
1274 | event = *p_event; | |
1275 | ||
1276 | if (!efx_event_present(&event)) | |
1277 | /* End of events */ | |
1278 | break; | |
1279 | ||
1280 | netif_vdbg(channel->efx, intr, channel->efx->net_dev, | |
1281 | "channel %d event is "EFX_QWORD_FMT"\n", | |
1282 | channel->channel, EFX_QWORD_VAL(event)); | |
1283 | ||
1284 | /* Clear this event by marking it all ones */ | |
1285 | EFX_SET_QWORD(*p_event); | |
1286 | ||
1287 | ++read_ptr; | |
1288 | ||
1289 | ev_code = EFX_QWORD_FIELD(event, FSF_AZ_EV_CODE); | |
1290 | ||
1291 | switch (ev_code) { | |
1292 | case FSE_AZ_EV_CODE_RX_EV: | |
1293 | efx_farch_handle_rx_event(channel, &event); | |
1294 | if (++spent == budget) | |
1295 | goto out; | |
1296 | break; | |
1297 | case FSE_AZ_EV_CODE_TX_EV: | |
5227eccc | 1298 | efx_farch_handle_tx_event(channel, &event); |
86094f7f BH |
1299 | break; |
1300 | case FSE_AZ_EV_CODE_DRV_GEN_EV: | |
1301 | efx_farch_handle_generated_event(channel, &event); | |
1302 | break; | |
1303 | case FSE_AZ_EV_CODE_DRIVER_EV: | |
1304 | efx_farch_handle_driver_event(channel, &event); | |
1305 | break; | |
7fa8d547 | 1306 | #ifdef CONFIG_SFC_SRIOV |
86094f7f | 1307 | case FSE_CZ_EV_CODE_USER_EV: |
327c685e | 1308 | efx_siena_sriov_event(channel, &event); |
86094f7f | 1309 | break; |
7fa8d547 | 1310 | #endif |
86094f7f BH |
1311 | case FSE_CZ_EV_CODE_MCDI_EV: |
1312 | efx_mcdi_process_event(channel, &event); | |
1313 | break; | |
1314 | case FSE_AZ_EV_CODE_GLOBAL_EV: | |
1315 | if (efx->type->handle_global_event && | |
1316 | efx->type->handle_global_event(channel, &event)) | |
1317 | break; | |
1318 | /* else fall through */ | |
1319 | default: | |
1320 | netif_err(channel->efx, hw, channel->efx->net_dev, | |
1321 | "channel %d unknown event type %d (data " | |
1322 | EFX_QWORD_FMT ")\n", channel->channel, | |
1323 | ev_code, EFX_QWORD_VAL(event)); | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | out: | |
1328 | channel->eventq_read_ptr = read_ptr; | |
1329 | return spent; | |
1330 | } | |
1331 | ||
1332 | /* Allocate buffer table entries for event queue */ | |
1333 | int efx_farch_ev_probe(struct efx_channel *channel) | |
1334 | { | |
1335 | struct efx_nic *efx = channel->efx; | |
1336 | unsigned entries; | |
1337 | ||
1338 | entries = channel->eventq_mask + 1; | |
1339 | return efx_alloc_special_buffer(efx, &channel->eventq, | |
1340 | entries * sizeof(efx_qword_t)); | |
1341 | } | |
1342 | ||
261e4d96 | 1343 | int efx_farch_ev_init(struct efx_channel *channel) |
86094f7f BH |
1344 | { |
1345 | efx_oword_t reg; | |
1346 | struct efx_nic *efx = channel->efx; | |
1347 | ||
1348 | netif_dbg(efx, hw, efx->net_dev, | |
1349 | "channel %d event queue in special buffers %d-%d\n", | |
1350 | channel->channel, channel->eventq.index, | |
1351 | channel->eventq.index + channel->eventq.entries - 1); | |
1352 | ||
5a6681e2 EC |
1353 | EFX_POPULATE_OWORD_3(reg, |
1354 | FRF_CZ_TIMER_Q_EN, 1, | |
1355 | FRF_CZ_HOST_NOTIFY_MODE, 0, | |
1356 | FRF_CZ_TIMER_MODE, FFE_CZ_TIMER_MODE_DIS); | |
1357 | efx_writeo_table(efx, ®, FR_BZ_TIMER_TBL, channel->channel); | |
86094f7f BH |
1358 | |
1359 | /* Pin event queue buffer */ | |
1360 | efx_init_special_buffer(efx, &channel->eventq); | |
1361 | ||
1362 | /* Fill event queue with all ones (i.e. empty events) */ | |
1363 | memset(channel->eventq.buf.addr, 0xff, channel->eventq.buf.len); | |
1364 | ||
1365 | /* Push event queue to card */ | |
1366 | EFX_POPULATE_OWORD_3(reg, | |
1367 | FRF_AZ_EVQ_EN, 1, | |
1368 | FRF_AZ_EVQ_SIZE, __ffs(channel->eventq.entries), | |
1369 | FRF_AZ_EVQ_BUF_BASE_ID, channel->eventq.index); | |
1370 | efx_writeo_table(efx, ®, efx->type->evq_ptr_tbl_base, | |
1371 | channel->channel); | |
1372 | ||
261e4d96 | 1373 | return 0; |
86094f7f BH |
1374 | } |
1375 | ||
1376 | void efx_farch_ev_fini(struct efx_channel *channel) | |
1377 | { | |
1378 | efx_oword_t reg; | |
1379 | struct efx_nic *efx = channel->efx; | |
1380 | ||
1381 | /* Remove event queue from card */ | |
1382 | EFX_ZERO_OWORD(reg); | |
1383 | efx_writeo_table(efx, ®, efx->type->evq_ptr_tbl_base, | |
1384 | channel->channel); | |
5a6681e2 | 1385 | efx_writeo_table(efx, ®, FR_BZ_TIMER_TBL, channel->channel); |
86094f7f BH |
1386 | |
1387 | /* Unpin event queue */ | |
1388 | efx_fini_special_buffer(efx, &channel->eventq); | |
1389 | } | |
1390 | ||
1391 | /* Free buffers backing event queue */ | |
1392 | void efx_farch_ev_remove(struct efx_channel *channel) | |
1393 | { | |
1394 | efx_free_special_buffer(channel->efx, &channel->eventq); | |
1395 | } | |
1396 | ||
1397 | ||
1398 | void efx_farch_ev_test_generate(struct efx_channel *channel) | |
1399 | { | |
1400 | efx_farch_magic_event(channel, EFX_CHANNEL_MAGIC_TEST(channel)); | |
1401 | } | |
1402 | ||
1403 | void efx_farch_rx_defer_refill(struct efx_rx_queue *rx_queue) | |
1404 | { | |
1405 | efx_farch_magic_event(efx_rx_queue_channel(rx_queue), | |
1406 | EFX_CHANNEL_MAGIC_FILL(rx_queue)); | |
1407 | } | |
1408 | ||
1409 | /************************************************************************** | |
1410 | * | |
1411 | * Hardware interrupts | |
1412 | * The hardware interrupt handler does very little work; all the event | |
1413 | * queue processing is carried out by per-channel tasklets. | |
1414 | * | |
1415 | **************************************************************************/ | |
1416 | ||
1417 | /* Enable/disable/generate interrupts */ | |
1418 | static inline void efx_farch_interrupts(struct efx_nic *efx, | |
1419 | bool enabled, bool force) | |
1420 | { | |
1421 | efx_oword_t int_en_reg_ker; | |
1422 | ||
1423 | EFX_POPULATE_OWORD_3(int_en_reg_ker, | |
1424 | FRF_AZ_KER_INT_LEVE_SEL, efx->irq_level, | |
1425 | FRF_AZ_KER_INT_KER, force, | |
1426 | FRF_AZ_DRV_INT_EN_KER, enabled); | |
1427 | efx_writeo(efx, &int_en_reg_ker, FR_AZ_INT_EN_KER); | |
1428 | } | |
1429 | ||
1430 | void efx_farch_irq_enable_master(struct efx_nic *efx) | |
1431 | { | |
1432 | EFX_ZERO_OWORD(*((efx_oword_t *) efx->irq_status.addr)); | |
1433 | wmb(); /* Ensure interrupt vector is clear before interrupts enabled */ | |
1434 | ||
1435 | efx_farch_interrupts(efx, true, false); | |
1436 | } | |
1437 | ||
1438 | void efx_farch_irq_disable_master(struct efx_nic *efx) | |
1439 | { | |
1440 | /* Disable interrupts */ | |
1441 | efx_farch_interrupts(efx, false, false); | |
1442 | } | |
1443 | ||
1444 | /* Generate a test interrupt | |
1445 | * Interrupt must already have been enabled, otherwise nasty things | |
1446 | * may happen. | |
1447 | */ | |
942e298e | 1448 | int efx_farch_irq_test_generate(struct efx_nic *efx) |
86094f7f BH |
1449 | { |
1450 | efx_farch_interrupts(efx, true, true); | |
942e298e | 1451 | return 0; |
86094f7f BH |
1452 | } |
1453 | ||
1454 | /* Process a fatal interrupt | |
1455 | * Disable bus mastering ASAP and schedule a reset | |
1456 | */ | |
1457 | irqreturn_t efx_farch_fatal_interrupt(struct efx_nic *efx) | |
1458 | { | |
86094f7f BH |
1459 | efx_oword_t *int_ker = efx->irq_status.addr; |
1460 | efx_oword_t fatal_intr; | |
1461 | int error, mem_perr; | |
1462 | ||
1463 | efx_reado(efx, &fatal_intr, FR_AZ_FATAL_INTR_KER); | |
1464 | error = EFX_OWORD_FIELD(fatal_intr, FRF_AZ_FATAL_INTR); | |
1465 | ||
1466 | netif_err(efx, hw, efx->net_dev, "SYSTEM ERROR "EFX_OWORD_FMT" status " | |
1467 | EFX_OWORD_FMT ": %s\n", EFX_OWORD_VAL(*int_ker), | |
1468 | EFX_OWORD_VAL(fatal_intr), | |
1469 | error ? "disabling bus mastering" : "no recognised error"); | |
1470 | ||
1471 | /* If this is a memory parity error dump which blocks are offending */ | |
1472 | mem_perr = (EFX_OWORD_FIELD(fatal_intr, FRF_AZ_MEM_PERR_INT_KER) || | |
1473 | EFX_OWORD_FIELD(fatal_intr, FRF_AZ_SRM_PERR_INT_KER)); | |
1474 | if (mem_perr) { | |
1475 | efx_oword_t reg; | |
1476 | efx_reado(efx, ®, FR_AZ_MEM_STAT); | |
1477 | netif_err(efx, hw, efx->net_dev, | |
1478 | "SYSTEM ERROR: memory parity error "EFX_OWORD_FMT"\n", | |
1479 | EFX_OWORD_VAL(reg)); | |
1480 | } | |
1481 | ||
1482 | /* Disable both devices */ | |
1483 | pci_clear_master(efx->pci_dev); | |
86094f7f BH |
1484 | efx_farch_irq_disable_master(efx); |
1485 | ||
1486 | /* Count errors and reset or disable the NIC accordingly */ | |
1487 | if (efx->int_error_count == 0 || | |
1488 | time_after(jiffies, efx->int_error_expire)) { | |
1489 | efx->int_error_count = 0; | |
1490 | efx->int_error_expire = | |
1491 | jiffies + EFX_INT_ERROR_EXPIRE * HZ; | |
1492 | } | |
1493 | if (++efx->int_error_count < EFX_MAX_INT_ERRORS) { | |
1494 | netif_err(efx, hw, efx->net_dev, | |
1495 | "SYSTEM ERROR - reset scheduled\n"); | |
1496 | efx_schedule_reset(efx, RESET_TYPE_INT_ERROR); | |
1497 | } else { | |
1498 | netif_err(efx, hw, efx->net_dev, | |
1499 | "SYSTEM ERROR - max number of errors seen." | |
1500 | "NIC will be disabled\n"); | |
1501 | efx_schedule_reset(efx, RESET_TYPE_DISABLE); | |
1502 | } | |
1503 | ||
1504 | return IRQ_HANDLED; | |
1505 | } | |
1506 | ||
1507 | /* Handle a legacy interrupt | |
1508 | * Acknowledges the interrupt and schedule event queue processing. | |
1509 | */ | |
1510 | irqreturn_t efx_farch_legacy_interrupt(int irq, void *dev_id) | |
1511 | { | |
1512 | struct efx_nic *efx = dev_id; | |
6aa7de05 | 1513 | bool soft_enabled = READ_ONCE(efx->irq_soft_enabled); |
86094f7f BH |
1514 | efx_oword_t *int_ker = efx->irq_status.addr; |
1515 | irqreturn_t result = IRQ_NONE; | |
1516 | struct efx_channel *channel; | |
1517 | efx_dword_t reg; | |
1518 | u32 queues; | |
1519 | int syserr; | |
1520 | ||
1521 | /* Read the ISR which also ACKs the interrupts */ | |
1522 | efx_readd(efx, ®, FR_BZ_INT_ISR0); | |
1523 | queues = EFX_EXTRACT_DWORD(reg, 0, 31); | |
1524 | ||
1525 | /* Legacy interrupts are disabled too late by the EEH kernel | |
1526 | * code. Disable them earlier. | |
1527 | * If an EEH error occurred, the read will have returned all ones. | |
1528 | */ | |
1529 | if (EFX_DWORD_IS_ALL_ONES(reg) && efx_try_recovery(efx) && | |
1530 | !efx->eeh_disabled_legacy_irq) { | |
1531 | disable_irq_nosync(efx->legacy_irq); | |
1532 | efx->eeh_disabled_legacy_irq = true; | |
1533 | } | |
1534 | ||
1535 | /* Handle non-event-queue sources */ | |
1536 | if (queues & (1U << efx->irq_level) && soft_enabled) { | |
1537 | syserr = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_FATAL_INT); | |
1538 | if (unlikely(syserr)) | |
1539 | return efx_farch_fatal_interrupt(efx); | |
1540 | efx->last_irq_cpu = raw_smp_processor_id(); | |
1541 | } | |
1542 | ||
1543 | if (queues != 0) { | |
ab3b8250 | 1544 | efx->irq_zero_count = 0; |
86094f7f BH |
1545 | |
1546 | /* Schedule processing of any interrupting queues */ | |
1547 | if (likely(soft_enabled)) { | |
1548 | efx_for_each_channel(channel, efx) { | |
1549 | if (queues & 1) | |
1550 | efx_schedule_channel_irq(channel); | |
1551 | queues >>= 1; | |
1552 | } | |
1553 | } | |
1554 | result = IRQ_HANDLED; | |
1555 | ||
ab3b8250 | 1556 | } else { |
86094f7f BH |
1557 | efx_qword_t *event; |
1558 | ||
ab3b8250 BH |
1559 | /* Legacy ISR read can return zero once (SF bug 15783) */ |
1560 | ||
86094f7f BH |
1561 | /* We can't return IRQ_HANDLED more than once on seeing ISR=0 |
1562 | * because this might be a shared interrupt. */ | |
1563 | if (efx->irq_zero_count++ == 0) | |
1564 | result = IRQ_HANDLED; | |
1565 | ||
1566 | /* Ensure we schedule or rearm all event queues */ | |
1567 | if (likely(soft_enabled)) { | |
1568 | efx_for_each_channel(channel, efx) { | |
1569 | event = efx_event(channel, | |
1570 | channel->eventq_read_ptr); | |
1571 | if (efx_event_present(event)) | |
1572 | efx_schedule_channel_irq(channel); | |
1573 | else | |
1574 | efx_farch_ev_read_ack(channel); | |
1575 | } | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | if (result == IRQ_HANDLED) | |
1580 | netif_vdbg(efx, intr, efx->net_dev, | |
1581 | "IRQ %d on CPU %d status " EFX_DWORD_FMT "\n", | |
1582 | irq, raw_smp_processor_id(), EFX_DWORD_VAL(reg)); | |
1583 | ||
1584 | return result; | |
1585 | } | |
1586 | ||
1587 | /* Handle an MSI interrupt | |
1588 | * | |
1589 | * Handle an MSI hardware interrupt. This routine schedules event | |
1590 | * queue processing. No interrupt acknowledgement cycle is necessary. | |
1591 | * Also, we never need to check that the interrupt is for us, since | |
1592 | * MSI interrupts cannot be shared. | |
1593 | */ | |
1594 | irqreturn_t efx_farch_msi_interrupt(int irq, void *dev_id) | |
1595 | { | |
1596 | struct efx_msi_context *context = dev_id; | |
1597 | struct efx_nic *efx = context->efx; | |
1598 | efx_oword_t *int_ker = efx->irq_status.addr; | |
1599 | int syserr; | |
1600 | ||
1601 | netif_vdbg(efx, intr, efx->net_dev, | |
1602 | "IRQ %d on CPU %d status " EFX_OWORD_FMT "\n", | |
1603 | irq, raw_smp_processor_id(), EFX_OWORD_VAL(*int_ker)); | |
1604 | ||
6aa7de05 | 1605 | if (!likely(READ_ONCE(efx->irq_soft_enabled))) |
86094f7f BH |
1606 | return IRQ_HANDLED; |
1607 | ||
1608 | /* Handle non-event-queue sources */ | |
1609 | if (context->index == efx->irq_level) { | |
1610 | syserr = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_FATAL_INT); | |
1611 | if (unlikely(syserr)) | |
1612 | return efx_farch_fatal_interrupt(efx); | |
1613 | efx->last_irq_cpu = raw_smp_processor_id(); | |
1614 | } | |
1615 | ||
1616 | /* Schedule processing of the channel */ | |
1617 | efx_schedule_channel_irq(efx->channel[context->index]); | |
1618 | ||
1619 | return IRQ_HANDLED; | |
1620 | } | |
1621 | ||
86094f7f BH |
1622 | /* Setup RSS indirection table. |
1623 | * This maps from the hash value of the packet to RXQ | |
1624 | */ | |
1625 | void efx_farch_rx_push_indir_table(struct efx_nic *efx) | |
1626 | { | |
1627 | size_t i = 0; | |
1628 | efx_dword_t dword; | |
1629 | ||
42356d9a | 1630 | BUILD_BUG_ON(ARRAY_SIZE(efx->rss_context.rx_indir_table) != |
86094f7f BH |
1631 | FR_BZ_RX_INDIRECTION_TBL_ROWS); |
1632 | ||
1633 | for (i = 0; i < FR_BZ_RX_INDIRECTION_TBL_ROWS; i++) { | |
1634 | EFX_POPULATE_DWORD_1(dword, FRF_BZ_IT_QUEUE, | |
42356d9a | 1635 | efx->rss_context.rx_indir_table[i]); |
86094f7f BH |
1636 | efx_writed(efx, &dword, |
1637 | FR_BZ_RX_INDIRECTION_TBL + | |
1638 | FR_BZ_RX_INDIRECTION_TBL_STEP * i); | |
1639 | } | |
1640 | } | |
1641 | ||
a707d188 EC |
1642 | void efx_farch_rx_pull_indir_table(struct efx_nic *efx) |
1643 | { | |
1644 | size_t i = 0; | |
1645 | efx_dword_t dword; | |
1646 | ||
42356d9a | 1647 | BUILD_BUG_ON(ARRAY_SIZE(efx->rss_context.rx_indir_table) != |
a707d188 EC |
1648 | FR_BZ_RX_INDIRECTION_TBL_ROWS); |
1649 | ||
1650 | for (i = 0; i < FR_BZ_RX_INDIRECTION_TBL_ROWS; i++) { | |
1651 | efx_readd(efx, &dword, | |
1652 | FR_BZ_RX_INDIRECTION_TBL + | |
1653 | FR_BZ_RX_INDIRECTION_TBL_STEP * i); | |
42356d9a | 1654 | efx->rss_context.rx_indir_table[i] = EFX_DWORD_FIELD(dword, FRF_BZ_IT_QUEUE); |
a707d188 EC |
1655 | } |
1656 | } | |
1657 | ||
86094f7f BH |
1658 | /* Looks at available SRAM resources and works out how many queues we |
1659 | * can support, and where things like descriptor caches should live. | |
1660 | * | |
1661 | * SRAM is split up as follows: | |
1662 | * 0 buftbl entries for channels | |
1663 | * efx->vf_buftbl_base buftbl entries for SR-IOV | |
1664 | * efx->rx_dc_base RX descriptor caches | |
1665 | * efx->tx_dc_base TX descriptor caches | |
1666 | */ | |
1667 | void efx_farch_dimension_resources(struct efx_nic *efx, unsigned sram_lim_qw) | |
1668 | { | |
2935e3c3 | 1669 | unsigned vi_count, buftbl_min, total_tx_channels; |
86094f7f | 1670 | |
2dc313ec SS |
1671 | #ifdef CONFIG_SFC_SRIOV |
1672 | struct siena_nic_data *nic_data = efx->nic_data; | |
1673 | #endif | |
1674 | ||
2935e3c3 | 1675 | total_tx_channels = efx->n_tx_channels + efx->n_extra_tx_channels; |
86094f7f BH |
1676 | /* Account for the buffer table entries backing the datapath channels |
1677 | * and the descriptor caches for those channels. | |
1678 | */ | |
1679 | buftbl_min = ((efx->n_rx_channels * EFX_MAX_DMAQ_SIZE + | |
2935e3c3 | 1680 | total_tx_channels * EFX_TXQ_TYPES * EFX_MAX_DMAQ_SIZE + |
86094f7f BH |
1681 | efx->n_channels * EFX_MAX_EVQ_SIZE) |
1682 | * sizeof(efx_qword_t) / EFX_BUF_SIZE); | |
2935e3c3 | 1683 | vi_count = max(efx->n_channels, total_tx_channels * EFX_TXQ_TYPES); |
86094f7f BH |
1684 | |
1685 | #ifdef CONFIG_SFC_SRIOV | |
7fa8d547 SS |
1686 | if (efx->type->sriov_wanted) { |
1687 | if (efx->type->sriov_wanted(efx)) { | |
1688 | unsigned vi_dc_entries, buftbl_free; | |
1689 | unsigned entries_per_vf, vf_limit; | |
1690 | ||
1691 | nic_data->vf_buftbl_base = buftbl_min; | |
1692 | ||
1693 | vi_dc_entries = RX_DC_ENTRIES + TX_DC_ENTRIES; | |
1694 | vi_count = max(vi_count, EFX_VI_BASE); | |
1695 | buftbl_free = (sram_lim_qw - buftbl_min - | |
1696 | vi_count * vi_dc_entries); | |
1697 | ||
1698 | entries_per_vf = ((vi_dc_entries + | |
1699 | EFX_VF_BUFTBL_PER_VI) * | |
1700 | efx_vf_size(efx)); | |
1701 | vf_limit = min(buftbl_free / entries_per_vf, | |
1702 | (1024U - EFX_VI_BASE) >> efx->vi_scale); | |
1703 | ||
1704 | if (efx->vf_count > vf_limit) { | |
1705 | netif_err(efx, probe, efx->net_dev, | |
1706 | "Reducing VF count from from %d to %d\n", | |
1707 | efx->vf_count, vf_limit); | |
1708 | efx->vf_count = vf_limit; | |
1709 | } | |
1710 | vi_count += efx->vf_count * efx_vf_size(efx); | |
86094f7f | 1711 | } |
86094f7f BH |
1712 | } |
1713 | #endif | |
1714 | ||
1715 | efx->tx_dc_base = sram_lim_qw - vi_count * TX_DC_ENTRIES; | |
1716 | efx->rx_dc_base = efx->tx_dc_base - vi_count * RX_DC_ENTRIES; | |
1717 | } | |
1718 | ||
1719 | u32 efx_farch_fpga_ver(struct efx_nic *efx) | |
1720 | { | |
1721 | efx_oword_t altera_build; | |
1722 | efx_reado(efx, &altera_build, FR_AZ_ALTERA_BUILD); | |
1723 | return EFX_OWORD_FIELD(altera_build, FRF_AZ_ALTERA_BUILD_VER); | |
1724 | } | |
1725 | ||
1726 | void efx_farch_init_common(struct efx_nic *efx) | |
1727 | { | |
1728 | efx_oword_t temp; | |
1729 | ||
1730 | /* Set positions of descriptor caches in SRAM. */ | |
1731 | EFX_POPULATE_OWORD_1(temp, FRF_AZ_SRM_TX_DC_BASE_ADR, efx->tx_dc_base); | |
1732 | efx_writeo(efx, &temp, FR_AZ_SRM_TX_DC_CFG); | |
1733 | EFX_POPULATE_OWORD_1(temp, FRF_AZ_SRM_RX_DC_BASE_ADR, efx->rx_dc_base); | |
1734 | efx_writeo(efx, &temp, FR_AZ_SRM_RX_DC_CFG); | |
1735 | ||
1736 | /* Set TX descriptor cache size. */ | |
1737 | BUILD_BUG_ON(TX_DC_ENTRIES != (8 << TX_DC_ENTRIES_ORDER)); | |
1738 | EFX_POPULATE_OWORD_1(temp, FRF_AZ_TX_DC_SIZE, TX_DC_ENTRIES_ORDER); | |
1739 | efx_writeo(efx, &temp, FR_AZ_TX_DC_CFG); | |
1740 | ||
1741 | /* Set RX descriptor cache size. Set low watermark to size-8, as | |
1742 | * this allows most efficient prefetching. | |
1743 | */ | |
1744 | BUILD_BUG_ON(RX_DC_ENTRIES != (8 << RX_DC_ENTRIES_ORDER)); | |
1745 | EFX_POPULATE_OWORD_1(temp, FRF_AZ_RX_DC_SIZE, RX_DC_ENTRIES_ORDER); | |
1746 | efx_writeo(efx, &temp, FR_AZ_RX_DC_CFG); | |
1747 | EFX_POPULATE_OWORD_1(temp, FRF_AZ_RX_DC_PF_LWM, RX_DC_ENTRIES - 8); | |
1748 | efx_writeo(efx, &temp, FR_AZ_RX_DC_PF_WM); | |
1749 | ||
1750 | /* Program INT_KER address */ | |
1751 | EFX_POPULATE_OWORD_2(temp, | |
1752 | FRF_AZ_NORM_INT_VEC_DIS_KER, | |
1753 | EFX_INT_MODE_USE_MSI(efx), | |
1754 | FRF_AZ_INT_ADR_KER, efx->irq_status.dma_addr); | |
1755 | efx_writeo(efx, &temp, FR_AZ_INT_ADR_KER); | |
1756 | ||
1757 | if (EFX_WORKAROUND_17213(efx) && !EFX_INT_MODE_USE_MSI(efx)) | |
1758 | /* Use an interrupt level unused by event queues */ | |
1759 | efx->irq_level = 0x1f; | |
1760 | else | |
1761 | /* Use a valid MSI-X vector */ | |
1762 | efx->irq_level = 0; | |
1763 | ||
1764 | /* Enable all the genuinely fatal interrupts. (They are still | |
1765 | * masked by the overall interrupt mask, controlled by | |
1766 | * falcon_interrupts()). | |
1767 | * | |
1768 | * Note: All other fatal interrupts are enabled | |
1769 | */ | |
1770 | EFX_POPULATE_OWORD_3(temp, | |
1771 | FRF_AZ_ILL_ADR_INT_KER_EN, 1, | |
1772 | FRF_AZ_RBUF_OWN_INT_KER_EN, 1, | |
1773 | FRF_AZ_TBUF_OWN_INT_KER_EN, 1); | |
5a6681e2 | 1774 | EFX_SET_OWORD_FIELD(temp, FRF_CZ_SRAM_PERR_INT_P_KER_EN, 1); |
86094f7f BH |
1775 | EFX_INVERT_OWORD(temp); |
1776 | efx_writeo(efx, &temp, FR_AZ_FATAL_INTR_KER); | |
1777 | ||
86094f7f BH |
1778 | /* Disable the ugly timer-based TX DMA backoff and allow TX DMA to be |
1779 | * controlled by the RX FIFO fill level. Set arbitration to one pkt/Q. | |
1780 | */ | |
1781 | efx_reado(efx, &temp, FR_AZ_TX_RESERVED); | |
1782 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_RX_SPACER, 0xfe); | |
1783 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_RX_SPACER_EN, 1); | |
1784 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_ONE_PKT_PER_Q, 1); | |
1785 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PUSH_EN, 1); | |
1786 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_DIS_NON_IP_EV, 1); | |
1787 | /* Enable SW_EV to inherit in char driver - assume harmless here */ | |
1788 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_SOFT_EVT_EN, 1); | |
1789 | /* Prefetch threshold 2 => fetch when descriptor cache half empty */ | |
1790 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PREF_THRESHOLD, 2); | |
1791 | /* Disable hardware watchdog which can misfire */ | |
1792 | EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PREF_WD_TMR, 0x3fffff); | |
1793 | /* Squash TX of packets of 16 bytes or less */ | |
5a6681e2 | 1794 | EFX_SET_OWORD_FIELD(temp, FRF_BZ_TX_FLUSH_MIN_LEN_EN, 1); |
86094f7f BH |
1795 | efx_writeo(efx, &temp, FR_AZ_TX_RESERVED); |
1796 | ||
5a6681e2 EC |
1797 | EFX_POPULATE_OWORD_4(temp, |
1798 | /* Default values */ | |
1799 | FRF_BZ_TX_PACE_SB_NOT_AF, 0x15, | |
1800 | FRF_BZ_TX_PACE_SB_AF, 0xb, | |
1801 | FRF_BZ_TX_PACE_FB_BASE, 0, | |
1802 | /* Allow large pace values in the fast bin. */ | |
1803 | FRF_BZ_TX_PACE_BIN_TH, | |
1804 | FFE_BZ_TX_PACE_RESERVED); | |
1805 | efx_writeo(efx, &temp, FR_BZ_TX_PACE); | |
86094f7f | 1806 | } |
add72477 BH |
1807 | |
1808 | /************************************************************************** | |
1809 | * | |
1810 | * Filter tables | |
1811 | * | |
1812 | ************************************************************************** | |
1813 | */ | |
1814 | ||
1815 | /* "Fudge factors" - difference between programmed value and actual depth. | |
1816 | * Due to pipelined implementation we need to program H/W with a value that | |
1817 | * is larger than the hop limit we want. | |
1818 | */ | |
1819 | #define EFX_FARCH_FILTER_CTL_SRCH_FUDGE_WILD 3 | |
1820 | #define EFX_FARCH_FILTER_CTL_SRCH_FUDGE_FULL 1 | |
1821 | ||
1822 | /* Hard maximum search limit. Hardware will time-out beyond 200-something. | |
1823 | * We also need to avoid infinite loops in efx_farch_filter_search() when the | |
1824 | * table is full. | |
1825 | */ | |
1826 | #define EFX_FARCH_FILTER_CTL_SRCH_MAX 200 | |
1827 | ||
1828 | /* Don't try very hard to find space for performance hints, as this is | |
1829 | * counter-productive. */ | |
1830 | #define EFX_FARCH_FILTER_CTL_SRCH_HINT_MAX 5 | |
1831 | ||
1832 | enum efx_farch_filter_type { | |
1833 | EFX_FARCH_FILTER_TCP_FULL = 0, | |
1834 | EFX_FARCH_FILTER_TCP_WILD, | |
1835 | EFX_FARCH_FILTER_UDP_FULL, | |
1836 | EFX_FARCH_FILTER_UDP_WILD, | |
1837 | EFX_FARCH_FILTER_MAC_FULL = 4, | |
1838 | EFX_FARCH_FILTER_MAC_WILD, | |
1839 | EFX_FARCH_FILTER_UC_DEF = 8, | |
1840 | EFX_FARCH_FILTER_MC_DEF, | |
1841 | EFX_FARCH_FILTER_TYPE_COUNT, /* number of specific types */ | |
1842 | }; | |
1843 | ||
1844 | enum efx_farch_filter_table_id { | |
1845 | EFX_FARCH_FILTER_TABLE_RX_IP = 0, | |
1846 | EFX_FARCH_FILTER_TABLE_RX_MAC, | |
1847 | EFX_FARCH_FILTER_TABLE_RX_DEF, | |
1848 | EFX_FARCH_FILTER_TABLE_TX_MAC, | |
1849 | EFX_FARCH_FILTER_TABLE_COUNT, | |
1850 | }; | |
1851 | ||
1852 | enum efx_farch_filter_index { | |
1853 | EFX_FARCH_FILTER_INDEX_UC_DEF, | |
1854 | EFX_FARCH_FILTER_INDEX_MC_DEF, | |
1855 | EFX_FARCH_FILTER_SIZE_RX_DEF, | |
1856 | }; | |
1857 | ||
1858 | struct efx_farch_filter_spec { | |
1859 | u8 type:4; | |
1860 | u8 priority:4; | |
1861 | u8 flags; | |
1862 | u16 dmaq_id; | |
1863 | u32 data[3]; | |
1864 | }; | |
1865 | ||
1866 | struct efx_farch_filter_table { | |
1867 | enum efx_farch_filter_table_id id; | |
1868 | u32 offset; /* address of table relative to BAR */ | |
1869 | unsigned size; /* number of entries */ | |
1870 | unsigned step; /* step between entries */ | |
1871 | unsigned used; /* number currently used */ | |
1872 | unsigned long *used_bitmap; | |
1873 | struct efx_farch_filter_spec *spec; | |
1874 | unsigned search_limit[EFX_FARCH_FILTER_TYPE_COUNT]; | |
1875 | }; | |
1876 | ||
1877 | struct efx_farch_filter_state { | |
fc7a6c28 | 1878 | struct rw_semaphore lock; /* Protects table contents */ |
add72477 BH |
1879 | struct efx_farch_filter_table table[EFX_FARCH_FILTER_TABLE_COUNT]; |
1880 | }; | |
1881 | ||
1882 | static void | |
1883 | efx_farch_filter_table_clear_entry(struct efx_nic *efx, | |
1884 | struct efx_farch_filter_table *table, | |
1885 | unsigned int filter_idx); | |
1886 | ||
1887 | /* The filter hash function is LFSR polynomial x^16 + x^3 + 1 of a 32-bit | |
1888 | * key derived from the n-tuple. The initial LFSR state is 0xffff. */ | |
1889 | static u16 efx_farch_filter_hash(u32 key) | |
1890 | { | |
1891 | u16 tmp; | |
1892 | ||
1893 | /* First 16 rounds */ | |
1894 | tmp = 0x1fff ^ key >> 16; | |
1895 | tmp = tmp ^ tmp >> 3 ^ tmp >> 6; | |
1896 | tmp = tmp ^ tmp >> 9; | |
1897 | /* Last 16 rounds */ | |
1898 | tmp = tmp ^ tmp << 13 ^ key; | |
1899 | tmp = tmp ^ tmp >> 3 ^ tmp >> 6; | |
1900 | return tmp ^ tmp >> 9; | |
1901 | } | |
1902 | ||
1903 | /* To allow for hash collisions, filter search continues at these | |
1904 | * increments from the first possible entry selected by the hash. */ | |
1905 | static u16 efx_farch_filter_increment(u32 key) | |
1906 | { | |
1907 | return key * 2 - 1; | |
1908 | } | |
1909 | ||
1910 | static enum efx_farch_filter_table_id | |
1911 | efx_farch_filter_spec_table_id(const struct efx_farch_filter_spec *spec) | |
1912 | { | |
1913 | BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_RX_IP != | |
1914 | (EFX_FARCH_FILTER_TCP_FULL >> 2)); | |
1915 | BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_RX_IP != | |
1916 | (EFX_FARCH_FILTER_TCP_WILD >> 2)); | |
1917 | BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_RX_IP != | |
1918 | (EFX_FARCH_FILTER_UDP_FULL >> 2)); | |
1919 | BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_RX_IP != | |
1920 | (EFX_FARCH_FILTER_UDP_WILD >> 2)); | |
1921 | BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_RX_MAC != | |
1922 | (EFX_FARCH_FILTER_MAC_FULL >> 2)); | |
1923 | BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_RX_MAC != | |
1924 | (EFX_FARCH_FILTER_MAC_WILD >> 2)); | |
1925 | BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_TX_MAC != | |
1926 | EFX_FARCH_FILTER_TABLE_RX_MAC + 2); | |
1927 | return (spec->type >> 2) + ((spec->flags & EFX_FILTER_FLAG_TX) ? 2 : 0); | |
1928 | } | |
1929 | ||
1930 | static void efx_farch_filter_push_rx_config(struct efx_nic *efx) | |
1931 | { | |
1932 | struct efx_farch_filter_state *state = efx->filter_state; | |
1933 | struct efx_farch_filter_table *table; | |
1934 | efx_oword_t filter_ctl; | |
1935 | ||
1936 | efx_reado(efx, &filter_ctl, FR_BZ_RX_FILTER_CTL); | |
1937 | ||
1938 | table = &state->table[EFX_FARCH_FILTER_TABLE_RX_IP]; | |
1939 | EFX_SET_OWORD_FIELD(filter_ctl, FRF_BZ_TCP_FULL_SRCH_LIMIT, | |
1940 | table->search_limit[EFX_FARCH_FILTER_TCP_FULL] + | |
1941 | EFX_FARCH_FILTER_CTL_SRCH_FUDGE_FULL); | |
1942 | EFX_SET_OWORD_FIELD(filter_ctl, FRF_BZ_TCP_WILD_SRCH_LIMIT, | |
1943 | table->search_limit[EFX_FARCH_FILTER_TCP_WILD] + | |
1944 | EFX_FARCH_FILTER_CTL_SRCH_FUDGE_WILD); | |
1945 | EFX_SET_OWORD_FIELD(filter_ctl, FRF_BZ_UDP_FULL_SRCH_LIMIT, | |
1946 | table->search_limit[EFX_FARCH_FILTER_UDP_FULL] + | |
1947 | EFX_FARCH_FILTER_CTL_SRCH_FUDGE_FULL); | |
1948 | EFX_SET_OWORD_FIELD(filter_ctl, FRF_BZ_UDP_WILD_SRCH_LIMIT, | |
1949 | table->search_limit[EFX_FARCH_FILTER_UDP_WILD] + | |
1950 | EFX_FARCH_FILTER_CTL_SRCH_FUDGE_WILD); | |
1951 | ||
1952 | table = &state->table[EFX_FARCH_FILTER_TABLE_RX_MAC]; | |
1953 | if (table->size) { | |
1954 | EFX_SET_OWORD_FIELD( | |
1955 | filter_ctl, FRF_CZ_ETHERNET_FULL_SEARCH_LIMIT, | |
1956 | table->search_limit[EFX_FARCH_FILTER_MAC_FULL] + | |
1957 | EFX_FARCH_FILTER_CTL_SRCH_FUDGE_FULL); | |
1958 | EFX_SET_OWORD_FIELD( | |
1959 | filter_ctl, FRF_CZ_ETHERNET_WILDCARD_SEARCH_LIMIT, | |
1960 | table->search_limit[EFX_FARCH_FILTER_MAC_WILD] + | |
1961 | EFX_FARCH_FILTER_CTL_SRCH_FUDGE_WILD); | |
1962 | } | |
1963 | ||
1964 | table = &state->table[EFX_FARCH_FILTER_TABLE_RX_DEF]; | |
1965 | if (table->size) { | |
1966 | EFX_SET_OWORD_FIELD( | |
1967 | filter_ctl, FRF_CZ_UNICAST_NOMATCH_Q_ID, | |
1968 | table->spec[EFX_FARCH_FILTER_INDEX_UC_DEF].dmaq_id); | |
1969 | EFX_SET_OWORD_FIELD( | |
1970 | filter_ctl, FRF_CZ_UNICAST_NOMATCH_RSS_ENABLED, | |
1971 | !!(table->spec[EFX_FARCH_FILTER_INDEX_UC_DEF].flags & | |
1972 | EFX_FILTER_FLAG_RX_RSS)); | |
1973 | EFX_SET_OWORD_FIELD( | |
1974 | filter_ctl, FRF_CZ_MULTICAST_NOMATCH_Q_ID, | |
1975 | table->spec[EFX_FARCH_FILTER_INDEX_MC_DEF].dmaq_id); | |
1976 | EFX_SET_OWORD_FIELD( | |
1977 | filter_ctl, FRF_CZ_MULTICAST_NOMATCH_RSS_ENABLED, | |
1978 | !!(table->spec[EFX_FARCH_FILTER_INDEX_MC_DEF].flags & | |
1979 | EFX_FILTER_FLAG_RX_RSS)); | |
1980 | ||
1981 | /* There is a single bit to enable RX scatter for all | |
1982 | * unmatched packets. Only set it if scatter is | |
1983 | * enabled in both filter specs. | |
1984 | */ | |
1985 | EFX_SET_OWORD_FIELD( | |
1986 | filter_ctl, FRF_BZ_SCATTER_ENBL_NO_MATCH_Q, | |
1987 | !!(table->spec[EFX_FARCH_FILTER_INDEX_UC_DEF].flags & | |
1988 | table->spec[EFX_FARCH_FILTER_INDEX_MC_DEF].flags & | |
1989 | EFX_FILTER_FLAG_RX_SCATTER)); | |
5a6681e2 | 1990 | } else { |
add72477 BH |
1991 | /* We don't expose 'default' filters because unmatched |
1992 | * packets always go to the queue number found in the | |
1993 | * RSS table. But we still need to set the RX scatter | |
1994 | * bit here. | |
1995 | */ | |
1996 | EFX_SET_OWORD_FIELD( | |
1997 | filter_ctl, FRF_BZ_SCATTER_ENBL_NO_MATCH_Q, | |
1998 | efx->rx_scatter); | |
1999 | } | |
2000 | ||
2001 | efx_writeo(efx, &filter_ctl, FR_BZ_RX_FILTER_CTL); | |
2002 | } | |
2003 | ||
2004 | static void efx_farch_filter_push_tx_limits(struct efx_nic *efx) | |
2005 | { | |
2006 | struct efx_farch_filter_state *state = efx->filter_state; | |
2007 | struct efx_farch_filter_table *table; | |
2008 | efx_oword_t tx_cfg; | |
2009 | ||
2010 | efx_reado(efx, &tx_cfg, FR_AZ_TX_CFG); | |
2011 | ||
2012 | table = &state->table[EFX_FARCH_FILTER_TABLE_TX_MAC]; | |
2013 | if (table->size) { | |
2014 | EFX_SET_OWORD_FIELD( | |
2015 | tx_cfg, FRF_CZ_TX_ETH_FILTER_FULL_SEARCH_RANGE, | |
2016 | table->search_limit[EFX_FARCH_FILTER_MAC_FULL] + | |
2017 | EFX_FARCH_FILTER_CTL_SRCH_FUDGE_FULL); | |
2018 | EFX_SET_OWORD_FIELD( | |
2019 | tx_cfg, FRF_CZ_TX_ETH_FILTER_WILD_SEARCH_RANGE, | |
2020 | table->search_limit[EFX_FARCH_FILTER_MAC_WILD] + | |
2021 | EFX_FARCH_FILTER_CTL_SRCH_FUDGE_WILD); | |
2022 | } | |
2023 | ||
2024 | efx_writeo(efx, &tx_cfg, FR_AZ_TX_CFG); | |
2025 | } | |
2026 | ||
2027 | static int | |
2028 | efx_farch_filter_from_gen_spec(struct efx_farch_filter_spec *spec, | |
2029 | const struct efx_filter_spec *gen_spec) | |
2030 | { | |
2031 | bool is_full = false; | |
2032 | ||
42356d9a | 2033 | if ((gen_spec->flags & EFX_FILTER_FLAG_RX_RSS) && gen_spec->rss_context) |
add72477 BH |
2034 | return -EINVAL; |
2035 | ||
2036 | spec->priority = gen_spec->priority; | |
2037 | spec->flags = gen_spec->flags; | |
2038 | spec->dmaq_id = gen_spec->dmaq_id; | |
2039 | ||
2040 | switch (gen_spec->match_flags) { | |
2041 | case (EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO | | |
2042 | EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT | | |
2043 | EFX_FILTER_MATCH_REM_HOST | EFX_FILTER_MATCH_REM_PORT): | |
2044 | is_full = true; | |
2045 | /* fall through */ | |
2046 | case (EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO | | |
2047 | EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT): { | |
2048 | __be32 rhost, host1, host2; | |
2049 | __be16 rport, port1, port2; | |
2050 | ||
e01b16a7 | 2051 | EFX_WARN_ON_PARANOID(!(gen_spec->flags & EFX_FILTER_FLAG_RX)); |
add72477 BH |
2052 | |
2053 | if (gen_spec->ether_type != htons(ETH_P_IP)) | |
2054 | return -EPROTONOSUPPORT; | |
2055 | if (gen_spec->loc_port == 0 || | |
2056 | (is_full && gen_spec->rem_port == 0)) | |
2057 | return -EADDRNOTAVAIL; | |
2058 | switch (gen_spec->ip_proto) { | |
2059 | case IPPROTO_TCP: | |
2060 | spec->type = (is_full ? EFX_FARCH_FILTER_TCP_FULL : | |
2061 | EFX_FARCH_FILTER_TCP_WILD); | |
2062 | break; | |
2063 | case IPPROTO_UDP: | |
2064 | spec->type = (is_full ? EFX_FARCH_FILTER_UDP_FULL : | |
2065 | EFX_FARCH_FILTER_UDP_WILD); | |
2066 | break; | |
2067 | default: | |
2068 | return -EPROTONOSUPPORT; | |
2069 | } | |
2070 | ||
2071 | /* Filter is constructed in terms of source and destination, | |
2072 | * with the odd wrinkle that the ports are swapped in a UDP | |
2073 | * wildcard filter. We need to convert from local and remote | |
2074 | * (= zero for wildcard) addresses. | |
2075 | */ | |
2076 | rhost = is_full ? gen_spec->rem_host[0] : 0; | |
2077 | rport = is_full ? gen_spec->rem_port : 0; | |
2078 | host1 = rhost; | |
2079 | host2 = gen_spec->loc_host[0]; | |
2080 | if (!is_full && gen_spec->ip_proto == IPPROTO_UDP) { | |
2081 | port1 = gen_spec->loc_port; | |
2082 | port2 = rport; | |
2083 | } else { | |
2084 | port1 = rport; | |
2085 | port2 = gen_spec->loc_port; | |
2086 | } | |
2087 | spec->data[0] = ntohl(host1) << 16 | ntohs(port1); | |
2088 | spec->data[1] = ntohs(port2) << 16 | ntohl(host1) >> 16; | |
2089 | spec->data[2] = ntohl(host2); | |
2090 | ||
2091 | break; | |
2092 | } | |
2093 | ||
2094 | case EFX_FILTER_MATCH_LOC_MAC | EFX_FILTER_MATCH_OUTER_VID: | |
2095 | is_full = true; | |
2096 | /* fall through */ | |
2097 | case EFX_FILTER_MATCH_LOC_MAC: | |
2098 | spec->type = (is_full ? EFX_FARCH_FILTER_MAC_FULL : | |
2099 | EFX_FARCH_FILTER_MAC_WILD); | |
2100 | spec->data[0] = is_full ? ntohs(gen_spec->outer_vid) : 0; | |
2101 | spec->data[1] = (gen_spec->loc_mac[2] << 24 | | |
2102 | gen_spec->loc_mac[3] << 16 | | |
2103 | gen_spec->loc_mac[4] << 8 | | |
2104 | gen_spec->loc_mac[5]); | |
2105 | spec->data[2] = (gen_spec->loc_mac[0] << 8 | | |
2106 | gen_spec->loc_mac[1]); | |
2107 | break; | |
2108 | ||
2109 | case EFX_FILTER_MATCH_LOC_MAC_IG: | |
2110 | spec->type = (is_multicast_ether_addr(gen_spec->loc_mac) ? | |
2111 | EFX_FARCH_FILTER_MC_DEF : | |
2112 | EFX_FARCH_FILTER_UC_DEF); | |
2113 | memset(spec->data, 0, sizeof(spec->data)); /* ensure equality */ | |
2114 | break; | |
2115 | ||
2116 | default: | |
2117 | return -EPROTONOSUPPORT; | |
2118 | } | |
2119 | ||
2120 | return 0; | |
2121 | } | |
2122 | ||
2123 | static void | |
2124 | efx_farch_filter_to_gen_spec(struct efx_filter_spec *gen_spec, | |
2125 | const struct efx_farch_filter_spec *spec) | |
2126 | { | |
2127 | bool is_full = false; | |
2128 | ||
2129 | /* *gen_spec should be completely initialised, to be consistent | |
2130 | * with efx_filter_init_{rx,tx}() and in case we want to copy | |
2131 | * it back to userland. | |
2132 | */ | |
2133 | memset(gen_spec, 0, sizeof(*gen_spec)); | |
2134 | ||
2135 | gen_spec->priority = spec->priority; | |
2136 | gen_spec->flags = spec->flags; | |
2137 | gen_spec->dmaq_id = spec->dmaq_id; | |
2138 | ||
2139 | switch (spec->type) { | |
2140 | case EFX_FARCH_FILTER_TCP_FULL: | |
2141 | case EFX_FARCH_FILTER_UDP_FULL: | |
2142 | is_full = true; | |
2143 | /* fall through */ | |
2144 | case EFX_FARCH_FILTER_TCP_WILD: | |
2145 | case EFX_FARCH_FILTER_UDP_WILD: { | |
2146 | __be32 host1, host2; | |
2147 | __be16 port1, port2; | |
2148 | ||
2149 | gen_spec->match_flags = | |
2150 | EFX_FILTER_MATCH_ETHER_TYPE | | |
2151 | EFX_FILTER_MATCH_IP_PROTO | | |
2152 | EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT; | |
2153 | if (is_full) | |
2154 | gen_spec->match_flags |= (EFX_FILTER_MATCH_REM_HOST | | |
2155 | EFX_FILTER_MATCH_REM_PORT); | |
2156 | gen_spec->ether_type = htons(ETH_P_IP); | |
2157 | gen_spec->ip_proto = | |
2158 | (spec->type == EFX_FARCH_FILTER_TCP_FULL || | |
2159 | spec->type == EFX_FARCH_FILTER_TCP_WILD) ? | |
2160 | IPPROTO_TCP : IPPROTO_UDP; | |
2161 | ||
2162 | host1 = htonl(spec->data[0] >> 16 | spec->data[1] << 16); | |
2163 | port1 = htons(spec->data[0]); | |
2164 | host2 = htonl(spec->data[2]); | |
2165 | port2 = htons(spec->data[1] >> 16); | |
2166 | if (spec->flags & EFX_FILTER_FLAG_TX) { | |
2167 | gen_spec->loc_host[0] = host1; | |
2168 | gen_spec->rem_host[0] = host2; | |
2169 | } else { | |
2170 | gen_spec->loc_host[0] = host2; | |
2171 | gen_spec->rem_host[0] = host1; | |
2172 | } | |
2173 | if (!!(gen_spec->flags & EFX_FILTER_FLAG_TX) ^ | |
2174 | (!is_full && gen_spec->ip_proto == IPPROTO_UDP)) { | |
2175 | gen_spec->loc_port = port1; | |
2176 | gen_spec->rem_port = port2; | |
2177 | } else { | |
2178 | gen_spec->loc_port = port2; | |
2179 | gen_spec->rem_port = port1; | |
2180 | } | |
2181 | ||
2182 | break; | |
2183 | } | |
2184 | ||
2185 | case EFX_FARCH_FILTER_MAC_FULL: | |
2186 | is_full = true; | |
2187 | /* fall through */ | |
2188 | case EFX_FARCH_FILTER_MAC_WILD: | |
2189 | gen_spec->match_flags = EFX_FILTER_MATCH_LOC_MAC; | |
2190 | if (is_full) | |
2191 | gen_spec->match_flags |= EFX_FILTER_MATCH_OUTER_VID; | |
2192 | gen_spec->loc_mac[0] = spec->data[2] >> 8; | |
2193 | gen_spec->loc_mac[1] = spec->data[2]; | |
2194 | gen_spec->loc_mac[2] = spec->data[1] >> 24; | |
2195 | gen_spec->loc_mac[3] = spec->data[1] >> 16; | |
2196 | gen_spec->loc_mac[4] = spec->data[1] >> 8; | |
2197 | gen_spec->loc_mac[5] = spec->data[1]; | |
2198 | gen_spec->outer_vid = htons(spec->data[0]); | |
2199 | break; | |
2200 | ||
2201 | case EFX_FARCH_FILTER_UC_DEF: | |
2202 | case EFX_FARCH_FILTER_MC_DEF: | |
2203 | gen_spec->match_flags = EFX_FILTER_MATCH_LOC_MAC_IG; | |
2204 | gen_spec->loc_mac[0] = spec->type == EFX_FARCH_FILTER_MC_DEF; | |
2205 | break; | |
2206 | ||
2207 | default: | |
2208 | WARN_ON(1); | |
2209 | break; | |
2210 | } | |
2211 | } | |
2212 | ||
2213 | static void | |
b59e6ef8 BH |
2214 | efx_farch_filter_init_rx_auto(struct efx_nic *efx, |
2215 | struct efx_farch_filter_spec *spec) | |
add72477 | 2216 | { |
add72477 BH |
2217 | /* If there's only one channel then disable RSS for non VF |
2218 | * traffic, thereby allowing VFs to use RSS when the PF can't. | |
2219 | */ | |
7665d1ab BH |
2220 | spec->priority = EFX_FILTER_PRI_AUTO; |
2221 | spec->flags = (EFX_FILTER_FLAG_RX | | |
f1c2ef40 | 2222 | (efx_rss_enabled(efx) ? EFX_FILTER_FLAG_RX_RSS : 0) | |
add72477 BH |
2223 | (efx->rx_scatter ? EFX_FILTER_FLAG_RX_SCATTER : 0)); |
2224 | spec->dmaq_id = 0; | |
add72477 BH |
2225 | } |
2226 | ||
2227 | /* Build a filter entry and return its n-tuple key. */ | |
2228 | static u32 efx_farch_filter_build(efx_oword_t *filter, | |
2229 | struct efx_farch_filter_spec *spec) | |
2230 | { | |
2231 | u32 data3; | |
2232 | ||
2233 | switch (efx_farch_filter_spec_table_id(spec)) { | |
2234 | case EFX_FARCH_FILTER_TABLE_RX_IP: { | |
2235 | bool is_udp = (spec->type == EFX_FARCH_FILTER_UDP_FULL || | |
2236 | spec->type == EFX_FARCH_FILTER_UDP_WILD); | |
2237 | EFX_POPULATE_OWORD_7( | |
2238 | *filter, | |
2239 | FRF_BZ_RSS_EN, | |
2240 | !!(spec->flags & EFX_FILTER_FLAG_RX_RSS), | |
2241 | FRF_BZ_SCATTER_EN, | |
2242 | !!(spec->flags & EFX_FILTER_FLAG_RX_SCATTER), | |
2243 | FRF_BZ_TCP_UDP, is_udp, | |
2244 | FRF_BZ_RXQ_ID, spec->dmaq_id, | |
2245 | EFX_DWORD_2, spec->data[2], | |
2246 | EFX_DWORD_1, spec->data[1], | |
2247 | EFX_DWORD_0, spec->data[0]); | |
2248 | data3 = is_udp; | |
2249 | break; | |
2250 | } | |
2251 | ||
2252 | case EFX_FARCH_FILTER_TABLE_RX_MAC: { | |
2253 | bool is_wild = spec->type == EFX_FARCH_FILTER_MAC_WILD; | |
2254 | EFX_POPULATE_OWORD_7( | |
2255 | *filter, | |
2256 | FRF_CZ_RMFT_RSS_EN, | |
2257 | !!(spec->flags & EFX_FILTER_FLAG_RX_RSS), | |
2258 | FRF_CZ_RMFT_SCATTER_EN, | |
2259 | !!(spec->flags & EFX_FILTER_FLAG_RX_SCATTER), | |
2260 | FRF_CZ_RMFT_RXQ_ID, spec->dmaq_id, | |
2261 | FRF_CZ_RMFT_WILDCARD_MATCH, is_wild, | |
2262 | FRF_CZ_RMFT_DEST_MAC_HI, spec->data[2], | |
2263 | FRF_CZ_RMFT_DEST_MAC_LO, spec->data[1], | |
2264 | FRF_CZ_RMFT_VLAN_ID, spec->data[0]); | |
2265 | data3 = is_wild; | |
2266 | break; | |
2267 | } | |
2268 | ||
2269 | case EFX_FARCH_FILTER_TABLE_TX_MAC: { | |
2270 | bool is_wild = spec->type == EFX_FARCH_FILTER_MAC_WILD; | |
2271 | EFX_POPULATE_OWORD_5(*filter, | |
2272 | FRF_CZ_TMFT_TXQ_ID, spec->dmaq_id, | |
2273 | FRF_CZ_TMFT_WILDCARD_MATCH, is_wild, | |
2274 | FRF_CZ_TMFT_SRC_MAC_HI, spec->data[2], | |
2275 | FRF_CZ_TMFT_SRC_MAC_LO, spec->data[1], | |
2276 | FRF_CZ_TMFT_VLAN_ID, spec->data[0]); | |
2277 | data3 = is_wild | spec->dmaq_id << 1; | |
2278 | break; | |
2279 | } | |
2280 | ||
2281 | default: | |
2282 | BUG(); | |
2283 | } | |
2284 | ||
2285 | return spec->data[0] ^ spec->data[1] ^ spec->data[2] ^ data3; | |
2286 | } | |
2287 | ||
2288 | static bool efx_farch_filter_equal(const struct efx_farch_filter_spec *left, | |
2289 | const struct efx_farch_filter_spec *right) | |
2290 | { | |
2291 | if (left->type != right->type || | |
2292 | memcmp(left->data, right->data, sizeof(left->data))) | |
2293 | return false; | |
2294 | ||
2295 | if (left->flags & EFX_FILTER_FLAG_TX && | |
2296 | left->dmaq_id != right->dmaq_id) | |
2297 | return false; | |
2298 | ||
2299 | return true; | |
2300 | } | |
2301 | ||
2302 | /* | |
2303 | * Construct/deconstruct external filter IDs. At least the RX filter | |
2304 | * IDs must be ordered by matching priority, for RX NFC semantics. | |
2305 | * | |
2306 | * Deconstruction needs to be robust against invalid IDs so that | |
2307 | * efx_filter_remove_id_safe() and efx_filter_get_filter_safe() can | |
2308 | * accept user-provided IDs. | |
2309 | */ | |
2310 | ||
2311 | #define EFX_FARCH_FILTER_MATCH_PRI_COUNT 5 | |
2312 | ||
2313 | static const u8 efx_farch_filter_type_match_pri[EFX_FARCH_FILTER_TYPE_COUNT] = { | |
2314 | [EFX_FARCH_FILTER_TCP_FULL] = 0, | |
2315 | [EFX_FARCH_FILTER_UDP_FULL] = 0, | |
2316 | [EFX_FARCH_FILTER_TCP_WILD] = 1, | |
2317 | [EFX_FARCH_FILTER_UDP_WILD] = 1, | |
2318 | [EFX_FARCH_FILTER_MAC_FULL] = 2, | |
2319 | [EFX_FARCH_FILTER_MAC_WILD] = 3, | |
2320 | [EFX_FARCH_FILTER_UC_DEF] = 4, | |
2321 | [EFX_FARCH_FILTER_MC_DEF] = 4, | |
2322 | }; | |
2323 | ||
2324 | static const enum efx_farch_filter_table_id efx_farch_filter_range_table[] = { | |
2325 | EFX_FARCH_FILTER_TABLE_RX_IP, /* RX match pri 0 */ | |
2326 | EFX_FARCH_FILTER_TABLE_RX_IP, | |
2327 | EFX_FARCH_FILTER_TABLE_RX_MAC, | |
2328 | EFX_FARCH_FILTER_TABLE_RX_MAC, | |
2329 | EFX_FARCH_FILTER_TABLE_RX_DEF, /* RX match pri 4 */ | |
2330 | EFX_FARCH_FILTER_TABLE_TX_MAC, /* TX match pri 0 */ | |
2331 | EFX_FARCH_FILTER_TABLE_TX_MAC, /* TX match pri 1 */ | |
2332 | }; | |
2333 | ||
2334 | #define EFX_FARCH_FILTER_INDEX_WIDTH 13 | |
2335 | #define EFX_FARCH_FILTER_INDEX_MASK ((1 << EFX_FARCH_FILTER_INDEX_WIDTH) - 1) | |
2336 | ||
2337 | static inline u32 | |
2338 | efx_farch_filter_make_id(const struct efx_farch_filter_spec *spec, | |
2339 | unsigned int index) | |
2340 | { | |
2341 | unsigned int range; | |
2342 | ||
2343 | range = efx_farch_filter_type_match_pri[spec->type]; | |
2344 | if (!(spec->flags & EFX_FILTER_FLAG_RX)) | |
2345 | range += EFX_FARCH_FILTER_MATCH_PRI_COUNT; | |
2346 | ||
2347 | return range << EFX_FARCH_FILTER_INDEX_WIDTH | index; | |
2348 | } | |
2349 | ||
2350 | static inline enum efx_farch_filter_table_id | |
2351 | efx_farch_filter_id_table_id(u32 id) | |
2352 | { | |
2353 | unsigned int range = id >> EFX_FARCH_FILTER_INDEX_WIDTH; | |
2354 | ||
2355 | if (range < ARRAY_SIZE(efx_farch_filter_range_table)) | |
2356 | return efx_farch_filter_range_table[range]; | |
2357 | else | |
2358 | return EFX_FARCH_FILTER_TABLE_COUNT; /* invalid */ | |
2359 | } | |
2360 | ||
2361 | static inline unsigned int efx_farch_filter_id_index(u32 id) | |
2362 | { | |
2363 | return id & EFX_FARCH_FILTER_INDEX_MASK; | |
2364 | } | |
2365 | ||
2366 | u32 efx_farch_filter_get_rx_id_limit(struct efx_nic *efx) | |
2367 | { | |
2368 | struct efx_farch_filter_state *state = efx->filter_state; | |
2369 | unsigned int range = EFX_FARCH_FILTER_MATCH_PRI_COUNT - 1; | |
2370 | enum efx_farch_filter_table_id table_id; | |
2371 | ||
2372 | do { | |
2373 | table_id = efx_farch_filter_range_table[range]; | |
2374 | if (state->table[table_id].size != 0) | |
2375 | return range << EFX_FARCH_FILTER_INDEX_WIDTH | | |
2376 | state->table[table_id].size; | |
2377 | } while (range--); | |
2378 | ||
2379 | return 0; | |
2380 | } | |
2381 | ||
2382 | s32 efx_farch_filter_insert(struct efx_nic *efx, | |
2383 | struct efx_filter_spec *gen_spec, | |
2384 | bool replace_equal) | |
2385 | { | |
2386 | struct efx_farch_filter_state *state = efx->filter_state; | |
2387 | struct efx_farch_filter_table *table; | |
2388 | struct efx_farch_filter_spec spec; | |
2389 | efx_oword_t filter; | |
2390 | int rep_index, ins_index; | |
2391 | unsigned int depth = 0; | |
2392 | int rc; | |
2393 | ||
2394 | rc = efx_farch_filter_from_gen_spec(&spec, gen_spec); | |
2395 | if (rc) | |
2396 | return rc; | |
2397 | ||
fc7a6c28 EC |
2398 | down_write(&state->lock); |
2399 | ||
add72477 | 2400 | table = &state->table[efx_farch_filter_spec_table_id(&spec)]; |
fc7a6c28 EC |
2401 | if (table->size == 0) { |
2402 | rc = -EINVAL; | |
2403 | goto out_unlock; | |
2404 | } | |
add72477 BH |
2405 | |
2406 | netif_vdbg(efx, hw, efx->net_dev, | |
2407 | "%s: type %d search_limit=%d", __func__, spec.type, | |
2408 | table->search_limit[spec.type]); | |
2409 | ||
2410 | if (table->id == EFX_FARCH_FILTER_TABLE_RX_DEF) { | |
2411 | /* One filter spec per type */ | |
2412 | BUILD_BUG_ON(EFX_FARCH_FILTER_INDEX_UC_DEF != 0); | |
2413 | BUILD_BUG_ON(EFX_FARCH_FILTER_INDEX_MC_DEF != | |
2414 | EFX_FARCH_FILTER_MC_DEF - EFX_FARCH_FILTER_UC_DEF); | |
2415 | rep_index = spec.type - EFX_FARCH_FILTER_UC_DEF; | |
2416 | ins_index = rep_index; | |
add72477 BH |
2417 | } else { |
2418 | /* Search concurrently for | |
2419 | * (1) a filter to be replaced (rep_index): any filter | |
2420 | * with the same match values, up to the current | |
2421 | * search depth for this type, and | |
2422 | * (2) the insertion point (ins_index): (1) or any | |
2423 | * free slot before it or up to the maximum search | |
2424 | * depth for this priority | |
2425 | * We fail if we cannot find (2). | |
2426 | * | |
2427 | * We can stop once either | |
2428 | * (a) we find (1), in which case we have definitely | |
2429 | * found (2) as well; or | |
2430 | * (b) we have searched exhaustively for (1), and have | |
2431 | * either found (2) or searched exhaustively for it | |
2432 | */ | |
2433 | u32 key = efx_farch_filter_build(&filter, &spec); | |
2434 | unsigned int hash = efx_farch_filter_hash(key); | |
2435 | unsigned int incr = efx_farch_filter_increment(key); | |
2436 | unsigned int max_rep_depth = table->search_limit[spec.type]; | |
2437 | unsigned int max_ins_depth = | |
2438 | spec.priority <= EFX_FILTER_PRI_HINT ? | |
2439 | EFX_FARCH_FILTER_CTL_SRCH_HINT_MAX : | |
2440 | EFX_FARCH_FILTER_CTL_SRCH_MAX; | |
2441 | unsigned int i = hash & (table->size - 1); | |
2442 | ||
2443 | ins_index = -1; | |
2444 | depth = 1; | |
2445 | ||
add72477 BH |
2446 | for (;;) { |
2447 | if (!test_bit(i, table->used_bitmap)) { | |
2448 | if (ins_index < 0) | |
2449 | ins_index = i; | |
2450 | } else if (efx_farch_filter_equal(&spec, | |
2451 | &table->spec[i])) { | |
2452 | /* Case (a) */ | |
2453 | if (ins_index < 0) | |
2454 | ins_index = i; | |
2455 | rep_index = i; | |
2456 | break; | |
2457 | } | |
2458 | ||
2459 | if (depth >= max_rep_depth && | |
2460 | (ins_index >= 0 || depth >= max_ins_depth)) { | |
2461 | /* Case (b) */ | |
2462 | if (ins_index < 0) { | |
2463 | rc = -EBUSY; | |
fc7a6c28 | 2464 | goto out_unlock; |
add72477 BH |
2465 | } |
2466 | rep_index = -1; | |
2467 | break; | |
2468 | } | |
2469 | ||
2470 | i = (i + incr) & (table->size - 1); | |
2471 | ++depth; | |
2472 | } | |
2473 | } | |
2474 | ||
2475 | /* If we found a filter to be replaced, check whether we | |
2476 | * should do so | |
2477 | */ | |
2478 | if (rep_index >= 0) { | |
2479 | struct efx_farch_filter_spec *saved_spec = | |
2480 | &table->spec[rep_index]; | |
2481 | ||
2482 | if (spec.priority == saved_spec->priority && !replace_equal) { | |
2483 | rc = -EEXIST; | |
fc7a6c28 | 2484 | goto out_unlock; |
add72477 | 2485 | } |
7665d1ab | 2486 | if (spec.priority < saved_spec->priority) { |
add72477 | 2487 | rc = -EPERM; |
fc7a6c28 | 2488 | goto out_unlock; |
add72477 | 2489 | } |
7665d1ab BH |
2490 | if (saved_spec->priority == EFX_FILTER_PRI_AUTO || |
2491 | saved_spec->flags & EFX_FILTER_FLAG_RX_OVER_AUTO) | |
2492 | spec.flags |= EFX_FILTER_FLAG_RX_OVER_AUTO; | |
add72477 BH |
2493 | } |
2494 | ||
2495 | /* Insert the filter */ | |
2496 | if (ins_index != rep_index) { | |
2497 | __set_bit(ins_index, table->used_bitmap); | |
2498 | ++table->used; | |
2499 | } | |
2500 | table->spec[ins_index] = spec; | |
2501 | ||
2502 | if (table->id == EFX_FARCH_FILTER_TABLE_RX_DEF) { | |
2503 | efx_farch_filter_push_rx_config(efx); | |
2504 | } else { | |
2505 | if (table->search_limit[spec.type] < depth) { | |
2506 | table->search_limit[spec.type] = depth; | |
2507 | if (spec.flags & EFX_FILTER_FLAG_TX) | |
2508 | efx_farch_filter_push_tx_limits(efx); | |
2509 | else | |
2510 | efx_farch_filter_push_rx_config(efx); | |
2511 | } | |
2512 | ||
2513 | efx_writeo(efx, &filter, | |
2514 | table->offset + table->step * ins_index); | |
2515 | ||
2516 | /* If we were able to replace a filter by inserting | |
2517 | * at a lower depth, clear the replaced filter | |
2518 | */ | |
2519 | if (ins_index != rep_index && rep_index >= 0) | |
2520 | efx_farch_filter_table_clear_entry(efx, table, | |
2521 | rep_index); | |
2522 | } | |
2523 | ||
2524 | netif_vdbg(efx, hw, efx->net_dev, | |
2525 | "%s: filter type %d index %d rxq %u set", | |
2526 | __func__, spec.type, ins_index, spec.dmaq_id); | |
2527 | rc = efx_farch_filter_make_id(&spec, ins_index); | |
2528 | ||
fc7a6c28 EC |
2529 | out_unlock: |
2530 | up_write(&state->lock); | |
add72477 BH |
2531 | return rc; |
2532 | } | |
2533 | ||
2534 | static void | |
2535 | efx_farch_filter_table_clear_entry(struct efx_nic *efx, | |
2536 | struct efx_farch_filter_table *table, | |
2537 | unsigned int filter_idx) | |
2538 | { | |
2539 | static efx_oword_t filter; | |
2540 | ||
14990a5d | 2541 | EFX_WARN_ON_PARANOID(!test_bit(filter_idx, table->used_bitmap)); |
8803e150 | 2542 | BUG_ON(table->offset == 0); /* can't clear MAC default filters */ |
14990a5d BH |
2543 | |
2544 | __clear_bit(filter_idx, table->used_bitmap); | |
2545 | --table->used; | |
2546 | memset(&table->spec[filter_idx], 0, sizeof(table->spec[0])); | |
2547 | ||
2548 | efx_writeo(efx, &filter, table->offset + table->step * filter_idx); | |
2549 | ||
2550 | /* If this filter required a greater search depth than | |
2551 | * any other, the search limit for its type can now be | |
2552 | * decreased. However, it is hard to determine that | |
2553 | * unless the table has become completely empty - in | |
2554 | * which case, all its search limits can be set to 0. | |
2555 | */ | |
2556 | if (unlikely(table->used == 0)) { | |
2557 | memset(table->search_limit, 0, sizeof(table->search_limit)); | |
2558 | if (table->id == EFX_FARCH_FILTER_TABLE_TX_MAC) | |
2559 | efx_farch_filter_push_tx_limits(efx); | |
2560 | else | |
2561 | efx_farch_filter_push_rx_config(efx); | |
2562 | } | |
2563 | } | |
2564 | ||
2565 | static int efx_farch_filter_remove(struct efx_nic *efx, | |
2566 | struct efx_farch_filter_table *table, | |
2567 | unsigned int filter_idx, | |
2568 | enum efx_filter_priority priority) | |
2569 | { | |
2570 | struct efx_farch_filter_spec *spec = &table->spec[filter_idx]; | |
2571 | ||
2572 | if (!test_bit(filter_idx, table->used_bitmap) || | |
f7284802 | 2573 | spec->priority != priority) |
14990a5d BH |
2574 | return -ENOENT; |
2575 | ||
7665d1ab | 2576 | if (spec->flags & EFX_FILTER_FLAG_RX_OVER_AUTO) { |
b59e6ef8 | 2577 | efx_farch_filter_init_rx_auto(efx, spec); |
add72477 | 2578 | efx_farch_filter_push_rx_config(efx); |
14990a5d BH |
2579 | } else { |
2580 | efx_farch_filter_table_clear_entry(efx, table, filter_idx); | |
add72477 | 2581 | } |
14990a5d BH |
2582 | |
2583 | return 0; | |
add72477 BH |
2584 | } |
2585 | ||
2586 | int efx_farch_filter_remove_safe(struct efx_nic *efx, | |
2587 | enum efx_filter_priority priority, | |
2588 | u32 filter_id) | |
2589 | { | |
2590 | struct efx_farch_filter_state *state = efx->filter_state; | |
2591 | enum efx_farch_filter_table_id table_id; | |
2592 | struct efx_farch_filter_table *table; | |
2593 | unsigned int filter_idx; | |
2594 | struct efx_farch_filter_spec *spec; | |
2595 | int rc; | |
2596 | ||
2597 | table_id = efx_farch_filter_id_table_id(filter_id); | |
2598 | if ((unsigned int)table_id >= EFX_FARCH_FILTER_TABLE_COUNT) | |
2599 | return -ENOENT; | |
2600 | table = &state->table[table_id]; | |
2601 | ||
2602 | filter_idx = efx_farch_filter_id_index(filter_id); | |
2603 | if (filter_idx >= table->size) | |
2604 | return -ENOENT; | |
fc7a6c28 | 2605 | down_write(&state->lock); |
add72477 BH |
2606 | spec = &table->spec[filter_idx]; |
2607 | ||
14990a5d | 2608 | rc = efx_farch_filter_remove(efx, table, filter_idx, priority); |
fc7a6c28 | 2609 | up_write(&state->lock); |
add72477 BH |
2610 | |
2611 | return rc; | |
2612 | } | |
2613 | ||
2614 | int efx_farch_filter_get_safe(struct efx_nic *efx, | |
2615 | enum efx_filter_priority priority, | |
2616 | u32 filter_id, struct efx_filter_spec *spec_buf) | |
2617 | { | |
2618 | struct efx_farch_filter_state *state = efx->filter_state; | |
2619 | enum efx_farch_filter_table_id table_id; | |
2620 | struct efx_farch_filter_table *table; | |
2621 | struct efx_farch_filter_spec *spec; | |
2622 | unsigned int filter_idx; | |
fc7a6c28 EC |
2623 | int rc = -ENOENT; |
2624 | ||
2625 | down_read(&state->lock); | |
add72477 BH |
2626 | |
2627 | table_id = efx_farch_filter_id_table_id(filter_id); | |
2628 | if ((unsigned int)table_id >= EFX_FARCH_FILTER_TABLE_COUNT) | |
fc7a6c28 | 2629 | goto out_unlock; |
add72477 BH |
2630 | table = &state->table[table_id]; |
2631 | ||
2632 | filter_idx = efx_farch_filter_id_index(filter_id); | |
2633 | if (filter_idx >= table->size) | |
fc7a6c28 | 2634 | goto out_unlock; |
add72477 BH |
2635 | spec = &table->spec[filter_idx]; |
2636 | ||
add72477 BH |
2637 | if (test_bit(filter_idx, table->used_bitmap) && |
2638 | spec->priority == priority) { | |
2639 | efx_farch_filter_to_gen_spec(spec_buf, spec); | |
2640 | rc = 0; | |
add72477 BH |
2641 | } |
2642 | ||
fc7a6c28 EC |
2643 | out_unlock: |
2644 | up_read(&state->lock); | |
add72477 BH |
2645 | return rc; |
2646 | } | |
2647 | ||
2648 | static void | |
2649 | efx_farch_filter_table_clear(struct efx_nic *efx, | |
2650 | enum efx_farch_filter_table_id table_id, | |
2651 | enum efx_filter_priority priority) | |
2652 | { | |
2653 | struct efx_farch_filter_state *state = efx->filter_state; | |
2654 | struct efx_farch_filter_table *table = &state->table[table_id]; | |
2655 | unsigned int filter_idx; | |
2656 | ||
fc7a6c28 | 2657 | down_write(&state->lock); |
7665d1ab BH |
2658 | for (filter_idx = 0; filter_idx < table->size; ++filter_idx) { |
2659 | if (table->spec[filter_idx].priority != EFX_FILTER_PRI_AUTO) | |
2660 | efx_farch_filter_remove(efx, table, | |
2661 | filter_idx, priority); | |
2662 | } | |
fc7a6c28 | 2663 | up_write(&state->lock); |
add72477 BH |
2664 | } |
2665 | ||
fbd79120 | 2666 | int efx_farch_filter_clear_rx(struct efx_nic *efx, |
add72477 BH |
2667 | enum efx_filter_priority priority) |
2668 | { | |
2669 | efx_farch_filter_table_clear(efx, EFX_FARCH_FILTER_TABLE_RX_IP, | |
2670 | priority); | |
2671 | efx_farch_filter_table_clear(efx, EFX_FARCH_FILTER_TABLE_RX_MAC, | |
2672 | priority); | |
8803e150 BH |
2673 | efx_farch_filter_table_clear(efx, EFX_FARCH_FILTER_TABLE_RX_DEF, |
2674 | priority); | |
fbd79120 | 2675 | return 0; |
add72477 BH |
2676 | } |
2677 | ||
2678 | u32 efx_farch_filter_count_rx_used(struct efx_nic *efx, | |
2679 | enum efx_filter_priority priority) | |
2680 | { | |
2681 | struct efx_farch_filter_state *state = efx->filter_state; | |
2682 | enum efx_farch_filter_table_id table_id; | |
2683 | struct efx_farch_filter_table *table; | |
2684 | unsigned int filter_idx; | |
2685 | u32 count = 0; | |
2686 | ||
fc7a6c28 | 2687 | down_read(&state->lock); |
add72477 BH |
2688 | |
2689 | for (table_id = EFX_FARCH_FILTER_TABLE_RX_IP; | |
2690 | table_id <= EFX_FARCH_FILTER_TABLE_RX_DEF; | |
2691 | table_id++) { | |
2692 | table = &state->table[table_id]; | |
2693 | for (filter_idx = 0; filter_idx < table->size; filter_idx++) { | |
2694 | if (test_bit(filter_idx, table->used_bitmap) && | |
2695 | table->spec[filter_idx].priority == priority) | |
2696 | ++count; | |
2697 | } | |
2698 | } | |
2699 | ||
fc7a6c28 | 2700 | up_read(&state->lock); |
add72477 BH |
2701 | |
2702 | return count; | |
2703 | } | |
2704 | ||
2705 | s32 efx_farch_filter_get_rx_ids(struct efx_nic *efx, | |
2706 | enum efx_filter_priority priority, | |
2707 | u32 *buf, u32 size) | |
2708 | { | |
2709 | struct efx_farch_filter_state *state = efx->filter_state; | |
2710 | enum efx_farch_filter_table_id table_id; | |
2711 | struct efx_farch_filter_table *table; | |
2712 | unsigned int filter_idx; | |
2713 | s32 count = 0; | |
2714 | ||
fc7a6c28 | 2715 | down_read(&state->lock); |
add72477 BH |
2716 | |
2717 | for (table_id = EFX_FARCH_FILTER_TABLE_RX_IP; | |
2718 | table_id <= EFX_FARCH_FILTER_TABLE_RX_DEF; | |
2719 | table_id++) { | |
2720 | table = &state->table[table_id]; | |
2721 | for (filter_idx = 0; filter_idx < table->size; filter_idx++) { | |
2722 | if (test_bit(filter_idx, table->used_bitmap) && | |
2723 | table->spec[filter_idx].priority == priority) { | |
2724 | if (count == size) { | |
2725 | count = -EMSGSIZE; | |
2726 | goto out; | |
2727 | } | |
2728 | buf[count++] = efx_farch_filter_make_id( | |
2729 | &table->spec[filter_idx], filter_idx); | |
2730 | } | |
2731 | } | |
2732 | } | |
2733 | out: | |
fc7a6c28 | 2734 | up_read(&state->lock); |
add72477 BH |
2735 | |
2736 | return count; | |
2737 | } | |
2738 | ||
2739 | /* Restore filter stater after reset */ | |
2740 | void efx_farch_filter_table_restore(struct efx_nic *efx) | |
2741 | { | |
2742 | struct efx_farch_filter_state *state = efx->filter_state; | |
2743 | enum efx_farch_filter_table_id table_id; | |
2744 | struct efx_farch_filter_table *table; | |
2745 | efx_oword_t filter; | |
2746 | unsigned int filter_idx; | |
2747 | ||
fc7a6c28 | 2748 | down_write(&state->lock); |
add72477 BH |
2749 | |
2750 | for (table_id = 0; table_id < EFX_FARCH_FILTER_TABLE_COUNT; table_id++) { | |
2751 | table = &state->table[table_id]; | |
2752 | ||
2753 | /* Check whether this is a regular register table */ | |
2754 | if (table->step == 0) | |
2755 | continue; | |
2756 | ||
2757 | for (filter_idx = 0; filter_idx < table->size; filter_idx++) { | |
2758 | if (!test_bit(filter_idx, table->used_bitmap)) | |
2759 | continue; | |
2760 | efx_farch_filter_build(&filter, &table->spec[filter_idx]); | |
2761 | efx_writeo(efx, &filter, | |
2762 | table->offset + table->step * filter_idx); | |
2763 | } | |
2764 | } | |
2765 | ||
2766 | efx_farch_filter_push_rx_config(efx); | |
2767 | efx_farch_filter_push_tx_limits(efx); | |
2768 | ||
fc7a6c28 | 2769 | up_write(&state->lock); |
add72477 BH |
2770 | } |
2771 | ||
2772 | void efx_farch_filter_table_remove(struct efx_nic *efx) | |
2773 | { | |
2774 | struct efx_farch_filter_state *state = efx->filter_state; | |
2775 | enum efx_farch_filter_table_id table_id; | |
2776 | ||
2777 | for (table_id = 0; table_id < EFX_FARCH_FILTER_TABLE_COUNT; table_id++) { | |
2778 | kfree(state->table[table_id].used_bitmap); | |
2779 | vfree(state->table[table_id].spec); | |
2780 | } | |
2781 | kfree(state); | |
2782 | } | |
2783 | ||
2784 | int efx_farch_filter_table_probe(struct efx_nic *efx) | |
2785 | { | |
2786 | struct efx_farch_filter_state *state; | |
2787 | struct efx_farch_filter_table *table; | |
2788 | unsigned table_id; | |
2789 | ||
2790 | state = kzalloc(sizeof(struct efx_farch_filter_state), GFP_KERNEL); | |
2791 | if (!state) | |
2792 | return -ENOMEM; | |
2793 | efx->filter_state = state; | |
cafb3960 | 2794 | init_rwsem(&state->lock); |
add72477 | 2795 | |
5a6681e2 EC |
2796 | table = &state->table[EFX_FARCH_FILTER_TABLE_RX_IP]; |
2797 | table->id = EFX_FARCH_FILTER_TABLE_RX_IP; | |
2798 | table->offset = FR_BZ_RX_FILTER_TBL0; | |
2799 | table->size = FR_BZ_RX_FILTER_TBL0_ROWS; | |
2800 | table->step = FR_BZ_RX_FILTER_TBL0_STEP; | |
add72477 | 2801 | |
5a6681e2 EC |
2802 | table = &state->table[EFX_FARCH_FILTER_TABLE_RX_MAC]; |
2803 | table->id = EFX_FARCH_FILTER_TABLE_RX_MAC; | |
2804 | table->offset = FR_CZ_RX_MAC_FILTER_TBL0; | |
2805 | table->size = FR_CZ_RX_MAC_FILTER_TBL0_ROWS; | |
2806 | table->step = FR_CZ_RX_MAC_FILTER_TBL0_STEP; | |
2807 | ||
2808 | table = &state->table[EFX_FARCH_FILTER_TABLE_RX_DEF]; | |
2809 | table->id = EFX_FARCH_FILTER_TABLE_RX_DEF; | |
2810 | table->size = EFX_FARCH_FILTER_SIZE_RX_DEF; | |
2811 | ||
2812 | table = &state->table[EFX_FARCH_FILTER_TABLE_TX_MAC]; | |
2813 | table->id = EFX_FARCH_FILTER_TABLE_TX_MAC; | |
2814 | table->offset = FR_CZ_TX_MAC_FILTER_TBL0; | |
2815 | table->size = FR_CZ_TX_MAC_FILTER_TBL0_ROWS; | |
2816 | table->step = FR_CZ_TX_MAC_FILTER_TBL0_STEP; | |
add72477 BH |
2817 | |
2818 | for (table_id = 0; table_id < EFX_FARCH_FILTER_TABLE_COUNT; table_id++) { | |
2819 | table = &state->table[table_id]; | |
2820 | if (table->size == 0) | |
2821 | continue; | |
2822 | table->used_bitmap = kcalloc(BITS_TO_LONGS(table->size), | |
2823 | sizeof(unsigned long), | |
2824 | GFP_KERNEL); | |
2825 | if (!table->used_bitmap) | |
2826 | goto fail; | |
fad953ce KC |
2827 | table->spec = vzalloc(array_size(sizeof(*table->spec), |
2828 | table->size)); | |
add72477 BH |
2829 | if (!table->spec) |
2830 | goto fail; | |
2831 | } | |
2832 | ||
8803e150 BH |
2833 | table = &state->table[EFX_FARCH_FILTER_TABLE_RX_DEF]; |
2834 | if (table->size) { | |
add72477 | 2835 | /* RX default filters must always exist */ |
8803e150 | 2836 | struct efx_farch_filter_spec *spec; |
add72477 | 2837 | unsigned i; |
8803e150 BH |
2838 | |
2839 | for (i = 0; i < EFX_FARCH_FILTER_SIZE_RX_DEF; i++) { | |
2840 | spec = &table->spec[i]; | |
2841 | spec->type = EFX_FARCH_FILTER_UC_DEF + i; | |
b59e6ef8 | 2842 | efx_farch_filter_init_rx_auto(efx, spec); |
8803e150 BH |
2843 | __set_bit(i, table->used_bitmap); |
2844 | } | |
add72477 BH |
2845 | } |
2846 | ||
2847 | efx_farch_filter_push_rx_config(efx); | |
2848 | ||
2849 | return 0; | |
2850 | ||
2851 | fail: | |
2852 | efx_farch_filter_table_remove(efx); | |
2853 | return -ENOMEM; | |
2854 | } | |
2855 | ||
2856 | /* Update scatter enable flags for filters pointing to our own RX queues */ | |
2857 | void efx_farch_filter_update_rx_scatter(struct efx_nic *efx) | |
2858 | { | |
2859 | struct efx_farch_filter_state *state = efx->filter_state; | |
2860 | enum efx_farch_filter_table_id table_id; | |
2861 | struct efx_farch_filter_table *table; | |
2862 | efx_oword_t filter; | |
2863 | unsigned int filter_idx; | |
2864 | ||
fc7a6c28 | 2865 | down_write(&state->lock); |
add72477 BH |
2866 | |
2867 | for (table_id = EFX_FARCH_FILTER_TABLE_RX_IP; | |
2868 | table_id <= EFX_FARCH_FILTER_TABLE_RX_DEF; | |
2869 | table_id++) { | |
2870 | table = &state->table[table_id]; | |
2871 | ||
2872 | for (filter_idx = 0; filter_idx < table->size; filter_idx++) { | |
2873 | if (!test_bit(filter_idx, table->used_bitmap) || | |
2874 | table->spec[filter_idx].dmaq_id >= | |
2875 | efx->n_rx_channels) | |
2876 | continue; | |
2877 | ||
2878 | if (efx->rx_scatter) | |
2879 | table->spec[filter_idx].flags |= | |
2880 | EFX_FILTER_FLAG_RX_SCATTER; | |
2881 | else | |
2882 | table->spec[filter_idx].flags &= | |
2883 | ~EFX_FILTER_FLAG_RX_SCATTER; | |
2884 | ||
2885 | if (table_id == EFX_FARCH_FILTER_TABLE_RX_DEF) | |
2886 | /* Pushed by efx_farch_filter_push_rx_config() */ | |
2887 | continue; | |
2888 | ||
2889 | efx_farch_filter_build(&filter, &table->spec[filter_idx]); | |
2890 | efx_writeo(efx, &filter, | |
2891 | table->offset + table->step * filter_idx); | |
2892 | } | |
2893 | } | |
2894 | ||
2895 | efx_farch_filter_push_rx_config(efx); | |
2896 | ||
fc7a6c28 | 2897 | up_write(&state->lock); |
add72477 BH |
2898 | } |
2899 | ||
2900 | #ifdef CONFIG_RFS_ACCEL | |
2901 | ||
add72477 BH |
2902 | bool efx_farch_filter_rfs_expire_one(struct efx_nic *efx, u32 flow_id, |
2903 | unsigned int index) | |
2904 | { | |
2905 | struct efx_farch_filter_state *state = efx->filter_state; | |
3af0f342 | 2906 | struct efx_farch_filter_table *table; |
f8d62037 EC |
2907 | bool ret = false, force = false; |
2908 | u16 arfs_id; | |
add72477 | 2909 | |
fc7a6c28 | 2910 | down_write(&state->lock); |
f8d62037 | 2911 | spin_lock_bh(&efx->rps_hash_lock); |
3af0f342 | 2912 | table = &state->table[EFX_FARCH_FILTER_TABLE_RX_IP]; |
add72477 | 2913 | if (test_bit(index, table->used_bitmap) && |
f8d62037 EC |
2914 | table->spec[index].priority == EFX_FILTER_PRI_HINT) { |
2915 | struct efx_arfs_rule *rule = NULL; | |
2916 | struct efx_filter_spec spec; | |
2917 | ||
2918 | efx_farch_filter_to_gen_spec(&spec, &table->spec[index]); | |
2919 | if (!efx->rps_hash_table) { | |
2920 | /* In the absence of the table, we always returned 0 to | |
2921 | * ARFS, so use the same to query it. | |
2922 | */ | |
2923 | arfs_id = 0; | |
2924 | } else { | |
2925 | rule = efx_rps_hash_find(efx, &spec); | |
2926 | if (!rule) { | |
2927 | /* ARFS table doesn't know of this filter, remove it */ | |
2928 | force = true; | |
2929 | } else { | |
2930 | arfs_id = rule->arfs_id; | |
2931 | if (!efx_rps_check_rule(rule, index, &force)) | |
2932 | goto out_unlock; | |
2933 | } | |
2934 | } | |
2935 | if (force || rps_may_expire_flow(efx->net_dev, spec.dmaq_id, | |
2936 | flow_id, arfs_id)) { | |
2937 | if (rule) | |
2938 | rule->filter_id = EFX_ARFS_FILTER_ID_REMOVING; | |
2939 | efx_rps_hash_del(efx, &spec); | |
2940 | efx_farch_filter_table_clear_entry(efx, table, index); | |
2941 | ret = true; | |
2942 | } | |
add72477 | 2943 | } |
f8d62037 EC |
2944 | out_unlock: |
2945 | spin_unlock_bh(&efx->rps_hash_lock); | |
fc7a6c28 | 2946 | up_write(&state->lock); |
3af0f342 | 2947 | return ret; |
add72477 BH |
2948 | } |
2949 | ||
2950 | #endif /* CONFIG_RFS_ACCEL */ | |
964e6135 BH |
2951 | |
2952 | void efx_farch_filter_sync_rx_mode(struct efx_nic *efx) | |
2953 | { | |
2954 | struct net_device *net_dev = efx->net_dev; | |
2955 | struct netdev_hw_addr *ha; | |
2956 | union efx_multicast_hash *mc_hash = &efx->multicast_hash; | |
2957 | u32 crc; | |
2958 | int bit; | |
2959 | ||
f650fb45 EC |
2960 | if (!efx_dev_registered(efx)) |
2961 | return; | |
2962 | ||
964e6135 BH |
2963 | netif_addr_lock_bh(net_dev); |
2964 | ||
2965 | efx->unicast_filter = !(net_dev->flags & IFF_PROMISC); | |
2966 | ||
2967 | /* Build multicast hash table */ | |
2968 | if (net_dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { | |
2969 | memset(mc_hash, 0xff, sizeof(*mc_hash)); | |
2970 | } else { | |
2971 | memset(mc_hash, 0x00, sizeof(*mc_hash)); | |
2972 | netdev_for_each_mc_addr(ha, net_dev) { | |
2973 | crc = ether_crc_le(ETH_ALEN, ha->addr); | |
2974 | bit = crc & (EFX_MCAST_HASH_ENTRIES - 1); | |
2975 | __set_bit_le(bit, mc_hash); | |
2976 | } | |
2977 | ||
2978 | /* Broadcast packets go through the multicast hash filter. | |
2979 | * ether_crc_le() of the broadcast address is 0xbe2612ff | |
2980 | * so we always add bit 0xff to the mask. | |
2981 | */ | |
2982 | __set_bit_le(0xff, mc_hash); | |
2983 | } | |
2984 | ||
2985 | netif_addr_unlock_bh(net_dev); | |
2986 | } |