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8e730c15 | 1 | /**************************************************************************** |
f7a6d2c4 | 2 | * Driver for Solarflare network controllers and boards |
8e730c15 | 3 | * Copyright 2005-2006 Fen Systems Ltd. |
f7a6d2c4 | 4 | * Copyright 2006-2013 Solarflare Communications Inc. |
8e730c15 BH |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License version 2 as published | |
8 | * by the Free Software Foundation, incorporated herein by reference. | |
9 | */ | |
10 | ||
11 | #include <linux/bitops.h> | |
12 | #include <linux/delay.h> | |
a6b7a407 | 13 | #include <linux/interrupt.h> |
8e730c15 BH |
14 | #include <linux/pci.h> |
15 | #include <linux/module.h> | |
16 | #include <linux/seq_file.h> | |
1899c111 | 17 | #include <linux/cpu_rmap.h> |
8e730c15 BH |
18 | #include "net_driver.h" |
19 | #include "bitfield.h" | |
20 | #include "efx.h" | |
21 | #include "nic.h" | |
137b7922 | 22 | #include "ef10_regs.h" |
8b8a95a1 | 23 | #include "farch_regs.h" |
8e730c15 BH |
24 | #include "io.h" |
25 | #include "workarounds.h" | |
26 | ||
8e730c15 BH |
27 | /************************************************************************** |
28 | * | |
29 | * Generic buffer handling | |
f7251a9c | 30 | * These buffers are used for interrupt status, MAC stats, etc. |
8e730c15 BH |
31 | * |
32 | **************************************************************************/ | |
33 | ||
34 | int efx_nic_alloc_buffer(struct efx_nic *efx, struct efx_buffer *buffer, | |
0d19a540 | 35 | unsigned int len, gfp_t gfp_flags) |
8e730c15 | 36 | { |
ede23fa8 JP |
37 | buffer->addr = dma_zalloc_coherent(&efx->pci_dev->dev, len, |
38 | &buffer->dma_addr, gfp_flags); | |
8e730c15 BH |
39 | if (!buffer->addr) |
40 | return -ENOMEM; | |
41 | buffer->len = len; | |
8e730c15 BH |
42 | return 0; |
43 | } | |
44 | ||
45 | void efx_nic_free_buffer(struct efx_nic *efx, struct efx_buffer *buffer) | |
46 | { | |
47 | if (buffer->addr) { | |
0e33d870 BH |
48 | dma_free_coherent(&efx->pci_dev->dev, buffer->len, |
49 | buffer->addr, buffer->dma_addr); | |
8e730c15 BH |
50 | buffer->addr = NULL; |
51 | } | |
52 | } | |
53 | ||
d4fabcc8 BH |
54 | /* Check whether an event is present in the eventq at the current |
55 | * read pointer. Only useful for self-test. | |
56 | */ | |
57 | bool efx_nic_event_present(struct efx_channel *channel) | |
58 | { | |
59 | return efx_event_present(efx_event(channel, channel->eventq_read_ptr)); | |
60 | } | |
8e730c15 | 61 | |
eee6f6a9 | 62 | void efx_nic_event_test_start(struct efx_channel *channel) |
8e730c15 | 63 | { |
dd40781e | 64 | channel->event_test_cpu = -1; |
eee6f6a9 | 65 | smp_wmb(); |
86094f7f | 66 | channel->efx->type->ev_test_generate(channel); |
8e730c15 BH |
67 | } |
68 | ||
eee6f6a9 | 69 | void efx_nic_irq_test_start(struct efx_nic *efx) |
8e730c15 | 70 | { |
eee6f6a9 BH |
71 | efx->last_irq_cpu = -1; |
72 | smp_wmb(); | |
86094f7f | 73 | efx->type->irq_test_generate(efx); |
8e730c15 BH |
74 | } |
75 | ||
76 | /* Hook interrupt handler(s) | |
77 | * Try MSI and then legacy interrupts. | |
78 | */ | |
79 | int efx_nic_init_interrupt(struct efx_nic *efx) | |
80 | { | |
81 | struct efx_channel *channel; | |
1899c111 | 82 | unsigned int n_irqs; |
8e730c15 BH |
83 | int rc; |
84 | ||
85 | if (!EFX_INT_MODE_USE_MSI(efx)) { | |
86094f7f BH |
86 | rc = request_irq(efx->legacy_irq, |
87 | efx->type->irq_handle_legacy, IRQF_SHARED, | |
8e730c15 BH |
88 | efx->name, efx); |
89 | if (rc) { | |
62776d03 BH |
90 | netif_err(efx, drv, efx->net_dev, |
91 | "failed to hook legacy IRQ %d\n", | |
92 | efx->pci_dev->irq); | |
8e730c15 BH |
93 | goto fail1; |
94 | } | |
95 | return 0; | |
96 | } | |
97 | ||
1899c111 BH |
98 | #ifdef CONFIG_RFS_ACCEL |
99 | if (efx->interrupt_mode == EFX_INT_MODE_MSIX) { | |
100 | efx->net_dev->rx_cpu_rmap = | |
101 | alloc_irq_cpu_rmap(efx->n_rx_channels); | |
102 | if (!efx->net_dev->rx_cpu_rmap) { | |
103 | rc = -ENOMEM; | |
104 | goto fail1; | |
105 | } | |
106 | } | |
107 | #endif | |
108 | ||
8e730c15 | 109 | /* Hook MSI or MSI-X interrupt */ |
1899c111 | 110 | n_irqs = 0; |
8e730c15 | 111 | efx_for_each_channel(channel, efx) { |
86094f7f | 112 | rc = request_irq(channel->irq, efx->type->irq_handle_msi, |
8e730c15 | 113 | IRQF_PROBE_SHARED, /* Not shared */ |
d8291187 BH |
114 | efx->msi_context[channel->channel].name, |
115 | &efx->msi_context[channel->channel]); | |
8e730c15 | 116 | if (rc) { |
62776d03 BH |
117 | netif_err(efx, drv, efx->net_dev, |
118 | "failed to hook IRQ %d\n", channel->irq); | |
8e730c15 BH |
119 | goto fail2; |
120 | } | |
1899c111 BH |
121 | ++n_irqs; |
122 | ||
123 | #ifdef CONFIG_RFS_ACCEL | |
124 | if (efx->interrupt_mode == EFX_INT_MODE_MSIX && | |
125 | channel->channel < efx->n_rx_channels) { | |
126 | rc = irq_cpu_rmap_add(efx->net_dev->rx_cpu_rmap, | |
127 | channel->irq); | |
128 | if (rc) | |
129 | goto fail2; | |
130 | } | |
131 | #endif | |
8e730c15 BH |
132 | } |
133 | ||
134 | return 0; | |
135 | ||
136 | fail2: | |
1899c111 BH |
137 | #ifdef CONFIG_RFS_ACCEL |
138 | free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap); | |
139 | efx->net_dev->rx_cpu_rmap = NULL; | |
140 | #endif | |
141 | efx_for_each_channel(channel, efx) { | |
142 | if (n_irqs-- == 0) | |
143 | break; | |
d8291187 | 144 | free_irq(channel->irq, &efx->msi_context[channel->channel]); |
1899c111 | 145 | } |
8e730c15 BH |
146 | fail1: |
147 | return rc; | |
148 | } | |
149 | ||
150 | void efx_nic_fini_interrupt(struct efx_nic *efx) | |
151 | { | |
152 | struct efx_channel *channel; | |
8e730c15 | 153 | |
1899c111 BH |
154 | #ifdef CONFIG_RFS_ACCEL |
155 | free_irq_cpu_rmap(efx->net_dev->rx_cpu_rmap); | |
156 | efx->net_dev->rx_cpu_rmap = NULL; | |
157 | #endif | |
158 | ||
8e730c15 | 159 | /* Disable MSI/MSI-X interrupts */ |
1899c111 | 160 | efx_for_each_channel(channel, efx) |
d8291187 | 161 | free_irq(channel->irq, &efx->msi_context[channel->channel]); |
8e730c15 | 162 | |
8e730c15 BH |
163 | /* Disable legacy interrupt */ |
164 | if (efx->legacy_irq) | |
165 | free_irq(efx->legacy_irq, efx); | |
166 | } | |
167 | ||
5b98c1bf BH |
168 | /* Register dump */ |
169 | ||
137b7922 BH |
170 | #define REGISTER_REVISION_FA 1 |
171 | #define REGISTER_REVISION_FB 2 | |
172 | #define REGISTER_REVISION_FC 3 | |
173 | #define REGISTER_REVISION_FZ 3 /* last Falcon arch revision */ | |
174 | #define REGISTER_REVISION_ED 4 | |
175 | #define REGISTER_REVISION_EZ 4 /* latest EF10 revision */ | |
5b98c1bf BH |
176 | |
177 | struct efx_nic_reg { | |
178 | u32 offset:24; | |
137b7922 | 179 | u32 min_revision:3, max_revision:3; |
5b98c1bf BH |
180 | }; |
181 | ||
137b7922 BH |
182 | #define REGISTER(name, arch, min_rev, max_rev) { \ |
183 | arch ## R_ ## min_rev ## max_rev ## _ ## name, \ | |
184 | REGISTER_REVISION_ ## arch ## min_rev, \ | |
185 | REGISTER_REVISION_ ## arch ## max_rev \ | |
5b98c1bf | 186 | } |
137b7922 BH |
187 | #define REGISTER_AA(name) REGISTER(name, F, A, A) |
188 | #define REGISTER_AB(name) REGISTER(name, F, A, B) | |
189 | #define REGISTER_AZ(name) REGISTER(name, F, A, Z) | |
190 | #define REGISTER_BB(name) REGISTER(name, F, B, B) | |
191 | #define REGISTER_BZ(name) REGISTER(name, F, B, Z) | |
192 | #define REGISTER_CZ(name) REGISTER(name, F, C, Z) | |
193 | #define REGISTER_DZ(name) REGISTER(name, E, D, Z) | |
5b98c1bf BH |
194 | |
195 | static const struct efx_nic_reg efx_nic_regs[] = { | |
196 | REGISTER_AZ(ADR_REGION), | |
197 | REGISTER_AZ(INT_EN_KER), | |
198 | REGISTER_BZ(INT_EN_CHAR), | |
199 | REGISTER_AZ(INT_ADR_KER), | |
200 | REGISTER_BZ(INT_ADR_CHAR), | |
201 | /* INT_ACK_KER is WO */ | |
202 | /* INT_ISR0 is RC */ | |
203 | REGISTER_AZ(HW_INIT), | |
204 | REGISTER_CZ(USR_EV_CFG), | |
205 | REGISTER_AB(EE_SPI_HCMD), | |
206 | REGISTER_AB(EE_SPI_HADR), | |
207 | REGISTER_AB(EE_SPI_HDATA), | |
208 | REGISTER_AB(EE_BASE_PAGE), | |
209 | REGISTER_AB(EE_VPD_CFG0), | |
210 | /* EE_VPD_SW_CNTL and EE_VPD_SW_DATA are not used */ | |
211 | /* PMBX_DBG_IADDR and PBMX_DBG_IDATA are indirect */ | |
212 | /* PCIE_CORE_INDIRECT is indirect */ | |
213 | REGISTER_AB(NIC_STAT), | |
214 | REGISTER_AB(GPIO_CTL), | |
215 | REGISTER_AB(GLB_CTL), | |
216 | /* FATAL_INTR_KER and FATAL_INTR_CHAR are partly RC */ | |
217 | REGISTER_BZ(DP_CTRL), | |
218 | REGISTER_AZ(MEM_STAT), | |
219 | REGISTER_AZ(CS_DEBUG), | |
220 | REGISTER_AZ(ALTERA_BUILD), | |
221 | REGISTER_AZ(CSR_SPARE), | |
222 | REGISTER_AB(PCIE_SD_CTL0123), | |
223 | REGISTER_AB(PCIE_SD_CTL45), | |
224 | REGISTER_AB(PCIE_PCS_CTL_STAT), | |
225 | /* DEBUG_DATA_OUT is not used */ | |
226 | /* DRV_EV is WO */ | |
227 | REGISTER_AZ(EVQ_CTL), | |
228 | REGISTER_AZ(EVQ_CNT1), | |
229 | REGISTER_AZ(EVQ_CNT2), | |
230 | REGISTER_AZ(BUF_TBL_CFG), | |
231 | REGISTER_AZ(SRM_RX_DC_CFG), | |
232 | REGISTER_AZ(SRM_TX_DC_CFG), | |
233 | REGISTER_AZ(SRM_CFG), | |
234 | /* BUF_TBL_UPD is WO */ | |
235 | REGISTER_AZ(SRM_UPD_EVQ), | |
236 | REGISTER_AZ(SRAM_PARITY), | |
237 | REGISTER_AZ(RX_CFG), | |
238 | REGISTER_BZ(RX_FILTER_CTL), | |
239 | /* RX_FLUSH_DESCQ is WO */ | |
240 | REGISTER_AZ(RX_DC_CFG), | |
241 | REGISTER_AZ(RX_DC_PF_WM), | |
242 | REGISTER_BZ(RX_RSS_TKEY), | |
243 | /* RX_NODESC_DROP is RC */ | |
244 | REGISTER_AA(RX_SELF_RST), | |
245 | /* RX_DEBUG, RX_PUSH_DROP are not used */ | |
246 | REGISTER_CZ(RX_RSS_IPV6_REG1), | |
247 | REGISTER_CZ(RX_RSS_IPV6_REG2), | |
248 | REGISTER_CZ(RX_RSS_IPV6_REG3), | |
249 | /* TX_FLUSH_DESCQ is WO */ | |
250 | REGISTER_AZ(TX_DC_CFG), | |
251 | REGISTER_AA(TX_CHKSM_CFG), | |
252 | REGISTER_AZ(TX_CFG), | |
253 | /* TX_PUSH_DROP is not used */ | |
254 | REGISTER_AZ(TX_RESERVED), | |
255 | REGISTER_BZ(TX_PACE), | |
256 | /* TX_PACE_DROP_QID is RC */ | |
257 | REGISTER_BB(TX_VLAN), | |
258 | REGISTER_BZ(TX_IPFIL_PORTEN), | |
259 | REGISTER_AB(MD_TXD), | |
260 | REGISTER_AB(MD_RXD), | |
261 | REGISTER_AB(MD_CS), | |
262 | REGISTER_AB(MD_PHY_ADR), | |
263 | REGISTER_AB(MD_ID), | |
264 | /* MD_STAT is RC */ | |
265 | REGISTER_AB(MAC_STAT_DMA), | |
266 | REGISTER_AB(MAC_CTRL), | |
267 | REGISTER_BB(GEN_MODE), | |
268 | REGISTER_AB(MAC_MC_HASH_REG0), | |
269 | REGISTER_AB(MAC_MC_HASH_REG1), | |
270 | REGISTER_AB(GM_CFG1), | |
271 | REGISTER_AB(GM_CFG2), | |
272 | /* GM_IPG and GM_HD are not used */ | |
273 | REGISTER_AB(GM_MAX_FLEN), | |
274 | /* GM_TEST is not used */ | |
275 | REGISTER_AB(GM_ADR1), | |
276 | REGISTER_AB(GM_ADR2), | |
277 | REGISTER_AB(GMF_CFG0), | |
278 | REGISTER_AB(GMF_CFG1), | |
279 | REGISTER_AB(GMF_CFG2), | |
280 | REGISTER_AB(GMF_CFG3), | |
281 | REGISTER_AB(GMF_CFG4), | |
282 | REGISTER_AB(GMF_CFG5), | |
283 | REGISTER_BB(TX_SRC_MAC_CTL), | |
284 | REGISTER_AB(XM_ADR_LO), | |
285 | REGISTER_AB(XM_ADR_HI), | |
286 | REGISTER_AB(XM_GLB_CFG), | |
287 | REGISTER_AB(XM_TX_CFG), | |
288 | REGISTER_AB(XM_RX_CFG), | |
289 | REGISTER_AB(XM_MGT_INT_MASK), | |
290 | REGISTER_AB(XM_FC), | |
291 | REGISTER_AB(XM_PAUSE_TIME), | |
292 | REGISTER_AB(XM_TX_PARAM), | |
293 | REGISTER_AB(XM_RX_PARAM), | |
294 | /* XM_MGT_INT_MSK (note no 'A') is RC */ | |
295 | REGISTER_AB(XX_PWR_RST), | |
296 | REGISTER_AB(XX_SD_CTL), | |
297 | REGISTER_AB(XX_TXDRV_CTL), | |
298 | /* XX_PRBS_CTL, XX_PRBS_CHK and XX_PRBS_ERR are not used */ | |
299 | /* XX_CORE_STAT is partly RC */ | |
137b7922 BH |
300 | REGISTER_DZ(BIU_HW_REV_ID), |
301 | REGISTER_DZ(MC_DB_LWRD), | |
302 | REGISTER_DZ(MC_DB_HWRD), | |
5b98c1bf BH |
303 | }; |
304 | ||
305 | struct efx_nic_reg_table { | |
306 | u32 offset:24; | |
137b7922 | 307 | u32 min_revision:3, max_revision:3; |
5b98c1bf BH |
308 | u32 step:6, rows:21; |
309 | }; | |
310 | ||
137b7922 | 311 | #define REGISTER_TABLE_DIMENSIONS(_, offset, arch, min_rev, max_rev, step, rows) { \ |
5b98c1bf | 312 | offset, \ |
137b7922 BH |
313 | REGISTER_REVISION_ ## arch ## min_rev, \ |
314 | REGISTER_REVISION_ ## arch ## max_rev, \ | |
5b98c1bf BH |
315 | step, rows \ |
316 | } | |
137b7922 | 317 | #define REGISTER_TABLE(name, arch, min_rev, max_rev) \ |
5b98c1bf | 318 | REGISTER_TABLE_DIMENSIONS( \ |
137b7922 BH |
319 | name, arch ## R_ ## min_rev ## max_rev ## _ ## name, \ |
320 | arch, min_rev, max_rev, \ | |
321 | arch ## R_ ## min_rev ## max_rev ## _ ## name ## _STEP, \ | |
322 | arch ## R_ ## min_rev ## max_rev ## _ ## name ## _ROWS) | |
323 | #define REGISTER_TABLE_AA(name) REGISTER_TABLE(name, F, A, A) | |
324 | #define REGISTER_TABLE_AZ(name) REGISTER_TABLE(name, F, A, Z) | |
325 | #define REGISTER_TABLE_BB(name) REGISTER_TABLE(name, F, B, B) | |
326 | #define REGISTER_TABLE_BZ(name) REGISTER_TABLE(name, F, B, Z) | |
5b98c1bf | 327 | #define REGISTER_TABLE_BB_CZ(name) \ |
137b7922 | 328 | REGISTER_TABLE_DIMENSIONS(name, FR_BZ_ ## name, F, B, B, \ |
5b98c1bf BH |
329 | FR_BZ_ ## name ## _STEP, \ |
330 | FR_BB_ ## name ## _ROWS), \ | |
137b7922 | 331 | REGISTER_TABLE_DIMENSIONS(name, FR_BZ_ ## name, F, C, Z, \ |
5b98c1bf BH |
332 | FR_BZ_ ## name ## _STEP, \ |
333 | FR_CZ_ ## name ## _ROWS) | |
137b7922 BH |
334 | #define REGISTER_TABLE_CZ(name) REGISTER_TABLE(name, F, C, Z) |
335 | #define REGISTER_TABLE_DZ(name) REGISTER_TABLE(name, E, D, Z) | |
5b98c1bf BH |
336 | |
337 | static const struct efx_nic_reg_table efx_nic_reg_tables[] = { | |
338 | /* DRIVER is not used */ | |
339 | /* EVQ_RPTR, TIMER_COMMAND, USR_EV and {RX,TX}_DESC_UPD are WO */ | |
340 | REGISTER_TABLE_BB(TX_IPFIL_TBL), | |
341 | REGISTER_TABLE_BB(TX_SRC_MAC_TBL), | |
342 | REGISTER_TABLE_AA(RX_DESC_PTR_TBL_KER), | |
343 | REGISTER_TABLE_BB_CZ(RX_DESC_PTR_TBL), | |
344 | REGISTER_TABLE_AA(TX_DESC_PTR_TBL_KER), | |
345 | REGISTER_TABLE_BB_CZ(TX_DESC_PTR_TBL), | |
346 | REGISTER_TABLE_AA(EVQ_PTR_TBL_KER), | |
347 | REGISTER_TABLE_BB_CZ(EVQ_PTR_TBL), | |
75abc51c | 348 | /* We can't reasonably read all of the buffer table (up to 8MB!). |
5b98c1bf BH |
349 | * However this driver will only use a few entries. Reading |
350 | * 1K entries allows for some expansion of queue count and | |
351 | * size before we need to change the version. */ | |
352 | REGISTER_TABLE_DIMENSIONS(BUF_FULL_TBL_KER, FR_AA_BUF_FULL_TBL_KER, | |
137b7922 | 353 | F, A, A, 8, 1024), |
5b98c1bf | 354 | REGISTER_TABLE_DIMENSIONS(BUF_FULL_TBL, FR_BZ_BUF_FULL_TBL, |
137b7922 | 355 | F, B, Z, 8, 1024), |
5b98c1bf BH |
356 | REGISTER_TABLE_CZ(RX_MAC_FILTER_TBL0), |
357 | REGISTER_TABLE_BB_CZ(TIMER_TBL), | |
358 | REGISTER_TABLE_BB_CZ(TX_PACE_TBL), | |
359 | REGISTER_TABLE_BZ(RX_INDIRECTION_TBL), | |
360 | /* TX_FILTER_TBL0 is huge and not used by this driver */ | |
361 | REGISTER_TABLE_CZ(TX_MAC_FILTER_TBL0), | |
362 | REGISTER_TABLE_CZ(MC_TREG_SMEM), | |
363 | /* MSIX_PBA_TABLE is not mapped */ | |
364 | /* SRM_DBG is not mapped (and is redundant with BUF_FLL_TBL) */ | |
75abc51c | 365 | REGISTER_TABLE_BZ(RX_FILTER_TBL0), |
137b7922 | 366 | REGISTER_TABLE_DZ(BIU_MC_SFT_STATUS), |
5b98c1bf BH |
367 | }; |
368 | ||
369 | size_t efx_nic_get_regs_len(struct efx_nic *efx) | |
370 | { | |
371 | const struct efx_nic_reg *reg; | |
372 | const struct efx_nic_reg_table *table; | |
373 | size_t len = 0; | |
374 | ||
375 | for (reg = efx_nic_regs; | |
376 | reg < efx_nic_regs + ARRAY_SIZE(efx_nic_regs); | |
377 | reg++) | |
378 | if (efx->type->revision >= reg->min_revision && | |
379 | efx->type->revision <= reg->max_revision) | |
380 | len += sizeof(efx_oword_t); | |
381 | ||
382 | for (table = efx_nic_reg_tables; | |
383 | table < efx_nic_reg_tables + ARRAY_SIZE(efx_nic_reg_tables); | |
384 | table++) | |
385 | if (efx->type->revision >= table->min_revision && | |
386 | efx->type->revision <= table->max_revision) | |
387 | len += table->rows * min_t(size_t, table->step, 16); | |
388 | ||
389 | return len; | |
390 | } | |
391 | ||
392 | void efx_nic_get_regs(struct efx_nic *efx, void *buf) | |
393 | { | |
394 | const struct efx_nic_reg *reg; | |
395 | const struct efx_nic_reg_table *table; | |
396 | ||
397 | for (reg = efx_nic_regs; | |
398 | reg < efx_nic_regs + ARRAY_SIZE(efx_nic_regs); | |
399 | reg++) { | |
400 | if (efx->type->revision >= reg->min_revision && | |
401 | efx->type->revision <= reg->max_revision) { | |
402 | efx_reado(efx, (efx_oword_t *)buf, reg->offset); | |
403 | buf += sizeof(efx_oword_t); | |
404 | } | |
405 | } | |
406 | ||
407 | for (table = efx_nic_reg_tables; | |
408 | table < efx_nic_reg_tables + ARRAY_SIZE(efx_nic_reg_tables); | |
409 | table++) { | |
410 | size_t size, i; | |
411 | ||
412 | if (!(efx->type->revision >= table->min_revision && | |
413 | efx->type->revision <= table->max_revision)) | |
414 | continue; | |
415 | ||
416 | size = min_t(size_t, table->step, 16); | |
417 | ||
418 | for (i = 0; i < table->rows; i++) { | |
419 | switch (table->step) { | |
778cdaf6 BH |
420 | case 4: /* 32-bit SRAM */ |
421 | efx_readd(efx, buf, table->offset + 4 * i); | |
5b98c1bf BH |
422 | break; |
423 | case 8: /* 64-bit SRAM */ | |
424 | efx_sram_readq(efx, | |
425 | efx->membase + table->offset, | |
426 | buf, i); | |
427 | break; | |
778cdaf6 | 428 | case 16: /* 128-bit-readable register */ |
5b98c1bf BH |
429 | efx_reado_table(efx, buf, table->offset, i); |
430 | break; | |
431 | case 32: /* 128-bit register, interleaved */ | |
432 | efx_reado_table(efx, buf, table->offset, 2 * i); | |
433 | break; | |
434 | default: | |
435 | WARN_ON(1); | |
436 | return; | |
437 | } | |
438 | buf += size; | |
439 | } | |
440 | } | |
441 | } | |
cd0ecc9a BH |
442 | |
443 | /** | |
444 | * efx_nic_describe_stats - Describe supported statistics for ethtool | |
445 | * @desc: Array of &struct efx_hw_stat_desc describing the statistics | |
446 | * @count: Length of the @desc array | |
447 | * @mask: Bitmask of which elements of @desc are enabled | |
448 | * @names: Buffer to copy names to, or %NULL. The names are copied | |
449 | * starting at intervals of %ETH_GSTRING_LEN bytes. | |
450 | * | |
451 | * Returns the number of visible statistics, i.e. the number of set | |
452 | * bits in the first @count bits of @mask for which a name is defined. | |
453 | */ | |
454 | size_t efx_nic_describe_stats(const struct efx_hw_stat_desc *desc, size_t count, | |
455 | const unsigned long *mask, u8 *names) | |
456 | { | |
457 | size_t visible = 0; | |
458 | size_t index; | |
459 | ||
460 | for_each_set_bit(index, mask, count) { | |
461 | if (desc[index].name) { | |
462 | if (names) { | |
463 | strlcpy(names, desc[index].name, | |
464 | ETH_GSTRING_LEN); | |
465 | names += ETH_GSTRING_LEN; | |
466 | } | |
467 | ++visible; | |
468 | } | |
469 | } | |
470 | ||
471 | return visible; | |
472 | } | |
473 | ||
474 | /** | |
475 | * efx_nic_update_stats - Convert statistics DMA buffer to array of u64 | |
476 | * @desc: Array of &struct efx_hw_stat_desc describing the DMA buffer | |
477 | * layout. DMA widths of 0, 16, 32 and 64 are supported; where | |
478 | * the width is specified as 0 the corresponding element of | |
479 | * @stats is not updated. | |
480 | * @count: Length of the @desc array | |
481 | * @mask: Bitmask of which elements of @desc are enabled | |
482 | * @stats: Buffer to update with the converted statistics. The length | |
87648cc9 | 483 | * of this array must be at least @count. |
cd0ecc9a BH |
484 | * @dma_buf: DMA buffer containing hardware statistics |
485 | * @accumulate: If set, the converted values will be added rather than | |
486 | * directly stored to the corresponding elements of @stats | |
487 | */ | |
488 | void efx_nic_update_stats(const struct efx_hw_stat_desc *desc, size_t count, | |
489 | const unsigned long *mask, | |
490 | u64 *stats, const void *dma_buf, bool accumulate) | |
491 | { | |
492 | size_t index; | |
493 | ||
494 | for_each_set_bit(index, mask, count) { | |
495 | if (desc[index].dma_width) { | |
496 | const void *addr = dma_buf + desc[index].offset; | |
497 | u64 val; | |
498 | ||
499 | switch (desc[index].dma_width) { | |
500 | case 16: | |
501 | val = le16_to_cpup((__le16 *)addr); | |
502 | break; | |
503 | case 32: | |
504 | val = le32_to_cpup((__le32 *)addr); | |
505 | break; | |
506 | case 64: | |
507 | val = le64_to_cpup((__le64 *)addr); | |
508 | break; | |
509 | default: | |
510 | WARN_ON(1); | |
511 | val = 0; | |
512 | break; | |
513 | } | |
514 | ||
515 | if (accumulate) | |
87648cc9 | 516 | stats[index] += val; |
cd0ecc9a | 517 | else |
87648cc9 | 518 | stats[index] = val; |
cd0ecc9a | 519 | } |
cd0ecc9a BH |
520 | } |
521 | } | |
f8f3b5ae JC |
522 | |
523 | void efx_nic_fix_nodesc_drop_stat(struct efx_nic *efx, u64 *rx_nodesc_drops) | |
524 | { | |
525 | /* if down, or this is the first update after coming up */ | |
526 | if (!(efx->net_dev->flags & IFF_UP) || !efx->rx_nodesc_drops_prev_state) | |
527 | efx->rx_nodesc_drops_while_down += | |
528 | *rx_nodesc_drops - efx->rx_nodesc_drops_total; | |
529 | efx->rx_nodesc_drops_total = *rx_nodesc_drops; | |
530 | efx->rx_nodesc_drops_prev_state = !!(efx->net_dev->flags & IFF_UP); | |
531 | *rx_nodesc_drops -= efx->rx_nodesc_drops_while_down; | |
532 | } | |
533 |