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Commit | Line | Data |
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14fa93cd SJ |
1 | #include <linux/aer.h> |
2 | #include <linux/delay.h> | |
086eac9e | 3 | #include <linux/debugfs.h> |
14fa93cd SJ |
4 | #include <linux/firmware.h> |
5 | #include <linux/list.h> | |
6 | #include <linux/module.h> | |
7 | #include <linux/mutex.h> | |
8 | #include <linux/pci.h> | |
9 | #include <linux/pci_ids.h> | |
10 | ||
11 | #include "nitrox_dev.h" | |
12 | #include "nitrox_common.h" | |
13 | #include "nitrox_csr.h" | |
41a9aca6 | 14 | #include "nitrox_hal.h" |
14fa93cd SJ |
15 | |
16 | #define CNN55XX_DEV_ID 0x12 | |
17 | #define MAX_PF_QUEUES 64 | |
18 | #define UCODE_HLEN 48 | |
19 | #define SE_GROUP 0 | |
20 | ||
41a9aca6 | 21 | #define DRIVER_VERSION "1.1" |
440bf347 | 22 | #define FW_DIR "cavium/" |
14fa93cd | 23 | /* SE microcode */ |
440bf347 | 24 | #define SE_FW FW_DIR "cnn55xx_se.fw" |
14fa93cd SJ |
25 | |
26 | static const char nitrox_driver_name[] = "CNN55XX"; | |
27 | ||
28 | static LIST_HEAD(ndevlist); | |
29 | static DEFINE_MUTEX(devlist_lock); | |
30 | static unsigned int num_devices; | |
31 | ||
32 | /** | |
33 | * nitrox_pci_tbl - PCI Device ID Table | |
34 | */ | |
35 | static const struct pci_device_id nitrox_pci_tbl[] = { | |
36 | {PCI_VDEVICE(CAVIUM, CNN55XX_DEV_ID), 0}, | |
37 | /* required last entry */ | |
38 | {0, } | |
39 | }; | |
40 | MODULE_DEVICE_TABLE(pci, nitrox_pci_tbl); | |
41 | ||
42 | static unsigned int qlen = DEFAULT_CMD_QLEN; | |
43 | module_param(qlen, uint, 0644); | |
44 | MODULE_PARM_DESC(qlen, "Command queue length - default 2048"); | |
45 | ||
41a9aca6 SJ |
46 | #ifdef CONFIG_PCI_IOV |
47 | int nitrox_sriov_configure(struct pci_dev *pdev, int num_vfs); | |
48 | #else | |
49 | int nitrox_sriov_configure(struct pci_dev *pdev, int num_vfs) | |
50 | { | |
51 | return 0; | |
52 | } | |
53 | #endif | |
54 | ||
14fa93cd SJ |
55 | /** |
56 | * struct ucode - Firmware Header | |
57 | * @id: microcode ID | |
58 | * @version: firmware version | |
59 | * @code_size: code section size | |
60 | * @raz: alignment | |
61 | * @code: code section | |
62 | */ | |
63 | struct ucode { | |
64 | u8 id; | |
65 | char version[VERSION_LEN - 1]; | |
66 | __be32 code_size; | |
67 | u8 raz[12]; | |
68 | u64 code[0]; | |
69 | }; | |
70 | ||
71 | /** | |
72 | * write_to_ucd_unit - Write Firmware to NITROX UCD unit | |
73 | */ | |
74 | static void write_to_ucd_unit(struct nitrox_device *ndev, | |
75 | struct ucode *ucode) | |
76 | { | |
77 | u32 code_size = be32_to_cpu(ucode->code_size) * 2; | |
78 | u64 offset, data; | |
79 | int i = 0; | |
80 | ||
81 | /* | |
82 | * UCD structure | |
83 | * | |
84 | * ------------- | |
85 | * | BLK 7 | | |
86 | * ------------- | |
87 | * | BLK 6 | | |
88 | * ------------- | |
89 | * | ... | | |
90 | * ------------- | |
91 | * | BLK 0 | | |
92 | * ------------- | |
93 | * Total of 8 blocks, each size 32KB | |
94 | */ | |
95 | ||
96 | /* set the block number */ | |
97 | offset = UCD_UCODE_LOAD_BLOCK_NUM; | |
98 | nitrox_write_csr(ndev, offset, 0); | |
99 | ||
100 | code_size = roundup(code_size, 8); | |
101 | while (code_size) { | |
102 | data = ucode->code[i]; | |
103 | /* write 8 bytes at a time */ | |
104 | offset = UCD_UCODE_LOAD_IDX_DATAX(i); | |
105 | nitrox_write_csr(ndev, offset, data); | |
106 | code_size -= 8; | |
107 | i++; | |
108 | } | |
109 | ||
110 | /* put all SE cores in group 0 */ | |
111 | offset = POM_GRP_EXECMASKX(SE_GROUP); | |
112 | nitrox_write_csr(ndev, offset, (~0ULL)); | |
113 | ||
114 | for (i = 0; i < ndev->hw.se_cores; i++) { | |
115 | /* | |
116 | * write block number and firware length | |
117 | * bit:<2:0> block number | |
118 | * bit:3 is set SE uses 32KB microcode | |
119 | * bit:3 is clear SE uses 64KB microcode | |
120 | */ | |
121 | offset = UCD_SE_EID_UCODE_BLOCK_NUMX(i); | |
122 | nitrox_write_csr(ndev, offset, 0x8); | |
123 | } | |
124 | usleep_range(300, 400); | |
125 | } | |
126 | ||
127 | static int nitrox_load_fw(struct nitrox_device *ndev, const char *fw_name) | |
128 | { | |
129 | const struct firmware *fw; | |
130 | struct ucode *ucode; | |
131 | int ret; | |
132 | ||
133 | dev_info(DEV(ndev), "Loading firmware \"%s\"\n", fw_name); | |
134 | ||
135 | ret = request_firmware(&fw, fw_name, DEV(ndev)); | |
136 | if (ret < 0) { | |
137 | dev_err(DEV(ndev), "failed to get firmware %s\n", fw_name); | |
138 | return ret; | |
139 | } | |
140 | ||
141 | ucode = (struct ucode *)fw->data; | |
142 | /* copy the firmware version */ | |
143 | memcpy(ndev->hw.fw_name, ucode->version, (VERSION_LEN - 2)); | |
144 | ndev->hw.fw_name[VERSION_LEN - 1] = '\0'; | |
145 | ||
146 | write_to_ucd_unit(ndev, ucode); | |
147 | release_firmware(fw); | |
148 | ||
14fa93cd SJ |
149 | return 0; |
150 | } | |
151 | ||
152 | /** | |
153 | * nitrox_add_to_devlist - add NITROX device to global device list | |
154 | * @ndev: NITROX device | |
155 | */ | |
156 | static int nitrox_add_to_devlist(struct nitrox_device *ndev) | |
157 | { | |
158 | struct nitrox_device *dev; | |
159 | int ret = 0; | |
160 | ||
161 | INIT_LIST_HEAD(&ndev->list); | |
162 | refcount_set(&ndev->refcnt, 1); | |
163 | ||
164 | mutex_lock(&devlist_lock); | |
165 | list_for_each_entry(dev, &ndevlist, list) { | |
166 | if (dev == ndev) { | |
167 | ret = -EEXIST; | |
168 | goto unlock; | |
169 | } | |
170 | } | |
171 | ndev->idx = num_devices++; | |
172 | list_add_tail(&ndev->list, &ndevlist); | |
173 | unlock: | |
174 | mutex_unlock(&devlist_lock); | |
175 | return ret; | |
176 | } | |
177 | ||
178 | /** | |
179 | * nitrox_remove_from_devlist - remove NITROX device from | |
180 | * global device list | |
181 | * @ndev: NITROX device | |
182 | */ | |
183 | static void nitrox_remove_from_devlist(struct nitrox_device *ndev) | |
184 | { | |
185 | mutex_lock(&devlist_lock); | |
186 | list_del(&ndev->list); | |
187 | num_devices--; | |
188 | mutex_unlock(&devlist_lock); | |
189 | } | |
190 | ||
f2663872 SJ |
191 | struct nitrox_device *nitrox_get_first_device(void) |
192 | { | |
193 | struct nitrox_device *ndev = NULL; | |
194 | ||
195 | mutex_lock(&devlist_lock); | |
196 | list_for_each_entry(ndev, &ndevlist, list) { | |
197 | if (nitrox_ready(ndev)) | |
198 | break; | |
199 | } | |
200 | mutex_unlock(&devlist_lock); | |
201 | if (!ndev) | |
202 | return NULL; | |
203 | ||
204 | refcount_inc(&ndev->refcnt); | |
205 | /* barrier to sync with other cpus */ | |
206 | smp_mb__after_atomic(); | |
207 | return ndev; | |
208 | } | |
209 | ||
210 | void nitrox_put_device(struct nitrox_device *ndev) | |
211 | { | |
212 | if (!ndev) | |
213 | return; | |
214 | ||
215 | refcount_dec(&ndev->refcnt); | |
216 | /* barrier to sync with other cpus */ | |
217 | smp_mb__after_atomic(); | |
218 | } | |
219 | ||
14fa93cd SJ |
220 | static int nitrox_reset_device(struct pci_dev *pdev) |
221 | { | |
222 | int pos = 0; | |
223 | ||
224 | pos = pci_save_state(pdev); | |
225 | if (pos) { | |
226 | dev_err(&pdev->dev, "Failed to save pci state\n"); | |
227 | return -ENOMEM; | |
228 | } | |
229 | ||
230 | pos = pci_pcie_cap(pdev); | |
231 | if (!pos) | |
232 | return -ENOTTY; | |
233 | ||
234 | if (!pci_wait_for_pending_transaction(pdev)) | |
235 | dev_err(&pdev->dev, "waiting for pending transaction\n"); | |
236 | ||
237 | pcie_capability_set_word(pdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR); | |
238 | msleep(100); | |
239 | pci_restore_state(pdev); | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | static int nitrox_pf_sw_init(struct nitrox_device *ndev) | |
245 | { | |
246 | int err; | |
247 | ||
248 | err = nitrox_common_sw_init(ndev); | |
249 | if (err) | |
250 | return err; | |
251 | ||
252 | err = nitrox_pf_init_isr(ndev); | |
253 | if (err) | |
254 | nitrox_common_sw_cleanup(ndev); | |
255 | ||
256 | return err; | |
257 | } | |
258 | ||
259 | static void nitrox_pf_sw_cleanup(struct nitrox_device *ndev) | |
260 | { | |
261 | nitrox_pf_cleanup_isr(ndev); | |
262 | nitrox_common_sw_cleanup(ndev); | |
263 | } | |
264 | ||
265 | /** | |
266 | * nitrox_bist_check - Check NITORX BIST registers status | |
267 | * @ndev: NITROX device | |
268 | */ | |
269 | static int nitrox_bist_check(struct nitrox_device *ndev) | |
270 | { | |
271 | u64 value = 0; | |
272 | int i; | |
273 | ||
274 | for (i = 0; i < NR_CLUSTERS; i++) { | |
275 | value += nitrox_read_csr(ndev, EMU_BIST_STATUSX(i)); | |
276 | value += nitrox_read_csr(ndev, EFL_CORE_BIST_REGX(i)); | |
277 | } | |
278 | value += nitrox_read_csr(ndev, UCD_BIST_STATUS); | |
279 | value += nitrox_read_csr(ndev, NPS_CORE_BIST_REG); | |
280 | value += nitrox_read_csr(ndev, NPS_CORE_NPC_BIST_REG); | |
281 | value += nitrox_read_csr(ndev, NPS_PKT_SLC_BIST_REG); | |
282 | value += nitrox_read_csr(ndev, NPS_PKT_IN_BIST_REG); | |
283 | value += nitrox_read_csr(ndev, POM_BIST_REG); | |
284 | value += nitrox_read_csr(ndev, BMI_BIST_REG); | |
285 | value += nitrox_read_csr(ndev, EFL_TOP_BIST_STAT); | |
286 | value += nitrox_read_csr(ndev, BMO_BIST_REG); | |
287 | value += nitrox_read_csr(ndev, LBC_BIST_STATUS); | |
288 | value += nitrox_read_csr(ndev, PEM_BIST_STATUSX(0)); | |
289 | if (value) | |
290 | return -EIO; | |
291 | return 0; | |
292 | } | |
293 | ||
14fa93cd SJ |
294 | static int nitrox_pf_hw_init(struct nitrox_device *ndev) |
295 | { | |
296 | int err; | |
297 | ||
298 | err = nitrox_bist_check(ndev); | |
299 | if (err) { | |
300 | dev_err(&ndev->pdev->dev, "BIST check failed\n"); | |
301 | return err; | |
302 | } | |
303 | /* get cores information */ | |
304 | nitrox_get_hwinfo(ndev); | |
305 | ||
306 | nitrox_config_nps_unit(ndev); | |
307 | nitrox_config_pom_unit(ndev); | |
308 | nitrox_config_efl_unit(ndev); | |
309 | /* configure IO units */ | |
310 | nitrox_config_bmi_unit(ndev); | |
311 | nitrox_config_bmo_unit(ndev); | |
312 | /* configure Local Buffer Cache */ | |
313 | nitrox_config_lbc_unit(ndev); | |
314 | nitrox_config_rand_unit(ndev); | |
315 | ||
316 | /* load firmware on SE cores */ | |
317 | err = nitrox_load_fw(ndev, SE_FW); | |
318 | if (err) | |
319 | return err; | |
320 | ||
321 | nitrox_config_emu_unit(ndev); | |
322 | ||
323 | return 0; | |
324 | } | |
325 | ||
326 | /** | |
327 | * nitrox_probe - NITROX Initialization function. | |
328 | * @pdev: PCI device information struct | |
329 | * @id: entry in nitrox_pci_tbl | |
330 | * | |
331 | * Return: 0, if the driver is bound to the device, or | |
332 | * a negative error if there is failure. | |
333 | */ | |
334 | static int nitrox_probe(struct pci_dev *pdev, | |
335 | const struct pci_device_id *id) | |
336 | { | |
337 | struct nitrox_device *ndev; | |
338 | int err; | |
339 | ||
340 | dev_info_once(&pdev->dev, "%s driver version %s\n", | |
341 | nitrox_driver_name, DRIVER_VERSION); | |
342 | ||
343 | err = pci_enable_device_mem(pdev); | |
344 | if (err) | |
345 | return err; | |
346 | ||
347 | /* do FLR */ | |
348 | err = nitrox_reset_device(pdev); | |
349 | if (err) { | |
350 | dev_err(&pdev->dev, "FLR failed\n"); | |
351 | pci_disable_device(pdev); | |
352 | return err; | |
353 | } | |
354 | ||
355 | if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) { | |
356 | dev_dbg(&pdev->dev, "DMA to 64-BIT address\n"); | |
357 | } else { | |
358 | err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); | |
359 | if (err) { | |
360 | dev_err(&pdev->dev, "DMA configuration failed\n"); | |
361 | pci_disable_device(pdev); | |
362 | return err; | |
363 | } | |
364 | } | |
365 | ||
366 | err = pci_request_mem_regions(pdev, nitrox_driver_name); | |
367 | if (err) { | |
368 | pci_disable_device(pdev); | |
369 | return err; | |
370 | } | |
371 | pci_set_master(pdev); | |
372 | ||
373 | ndev = kzalloc(sizeof(*ndev), GFP_KERNEL); | |
32e67b9a CJ |
374 | if (!ndev) { |
375 | err = -ENOMEM; | |
14fa93cd | 376 | goto ndev_fail; |
32e67b9a | 377 | } |
14fa93cd SJ |
378 | |
379 | pci_set_drvdata(pdev, ndev); | |
380 | ndev->pdev = pdev; | |
381 | ||
382 | /* add to device list */ | |
383 | nitrox_add_to_devlist(ndev); | |
384 | ||
385 | ndev->hw.vendor_id = pdev->vendor; | |
386 | ndev->hw.device_id = pdev->device; | |
387 | ndev->hw.revision_id = pdev->revision; | |
388 | /* command timeout in jiffies */ | |
389 | ndev->timeout = msecs_to_jiffies(CMD_TIMEOUT); | |
390 | ndev->node = dev_to_node(&pdev->dev); | |
391 | if (ndev->node == NUMA_NO_NODE) | |
392 | ndev->node = 0; | |
393 | ||
394 | ndev->bar_addr = ioremap(pci_resource_start(pdev, 0), | |
395 | pci_resource_len(pdev, 0)); | |
396 | if (!ndev->bar_addr) { | |
397 | err = -EIO; | |
398 | goto ioremap_err; | |
399 | } | |
400 | /* allocate command queus based on cpus, max queues are 64 */ | |
401 | ndev->nr_queues = min_t(u32, MAX_PF_QUEUES, num_online_cpus()); | |
402 | ndev->qlen = qlen; | |
403 | ||
404 | err = nitrox_pf_sw_init(ndev); | |
405 | if (err) | |
406 | goto ioremap_err; | |
407 | ||
408 | err = nitrox_pf_hw_init(ndev); | |
409 | if (err) | |
410 | goto pf_hw_fail; | |
411 | ||
086eac9e SJ |
412 | err = nitrox_debugfs_init(ndev); |
413 | if (err) | |
414 | goto pf_hw_fail; | |
415 | ||
fec165c9 SJ |
416 | /* clear the statistics */ |
417 | atomic64_set(&ndev->stats.posted, 0); | |
418 | atomic64_set(&ndev->stats.completed, 0); | |
419 | atomic64_set(&ndev->stats.dropped, 0); | |
420 | ||
41a9aca6 | 421 | atomic_set(&ndev->state, __NDEV_READY); |
14fa93cd SJ |
422 | /* barrier to sync with other cpus */ |
423 | smp_mb__after_atomic(); | |
f2663872 SJ |
424 | |
425 | err = nitrox_crypto_register(); | |
426 | if (err) | |
427 | goto crypto_fail; | |
428 | ||
14fa93cd SJ |
429 | return 0; |
430 | ||
f2663872 SJ |
431 | crypto_fail: |
432 | nitrox_debugfs_exit(ndev); | |
41a9aca6 | 433 | atomic_set(&ndev->state, __NDEV_NOT_READY); |
f2663872 SJ |
434 | /* barrier to sync with other cpus */ |
435 | smp_mb__after_atomic(); | |
14fa93cd SJ |
436 | pf_hw_fail: |
437 | nitrox_pf_sw_cleanup(ndev); | |
438 | ioremap_err: | |
439 | nitrox_remove_from_devlist(ndev); | |
440 | kfree(ndev); | |
441 | pci_set_drvdata(pdev, NULL); | |
442 | ndev_fail: | |
443 | pci_release_mem_regions(pdev); | |
444 | pci_disable_device(pdev); | |
445 | return err; | |
446 | } | |
447 | ||
448 | /** | |
449 | * nitrox_remove - Unbind the driver from the device. | |
450 | * @pdev: PCI device information struct | |
451 | */ | |
452 | static void nitrox_remove(struct pci_dev *pdev) | |
453 | { | |
454 | struct nitrox_device *ndev = pci_get_drvdata(pdev); | |
455 | ||
456 | if (!ndev) | |
457 | return; | |
458 | ||
459 | if (!refcount_dec_and_test(&ndev->refcnt)) { | |
460 | dev_err(DEV(ndev), "Device refcnt not zero (%d)\n", | |
461 | refcount_read(&ndev->refcnt)); | |
462 | return; | |
463 | } | |
464 | ||
465 | dev_info(DEV(ndev), "Removing Device %x:%x\n", | |
466 | ndev->hw.vendor_id, ndev->hw.device_id); | |
467 | ||
41a9aca6 | 468 | atomic_set(&ndev->state, __NDEV_NOT_READY); |
14fa93cd SJ |
469 | /* barrier to sync with other cpus */ |
470 | smp_mb__after_atomic(); | |
471 | ||
472 | nitrox_remove_from_devlist(ndev); | |
41a9aca6 SJ |
473 | |
474 | #ifdef CONFIG_PCI_IOV | |
475 | /* disable SR-IOV */ | |
476 | nitrox_sriov_configure(pdev, 0); | |
477 | #endif | |
f2663872 | 478 | nitrox_crypto_unregister(); |
086eac9e | 479 | nitrox_debugfs_exit(ndev); |
14fa93cd SJ |
480 | nitrox_pf_sw_cleanup(ndev); |
481 | ||
482 | iounmap(ndev->bar_addr); | |
483 | kfree(ndev); | |
484 | ||
485 | pci_set_drvdata(pdev, NULL); | |
486 | pci_release_mem_regions(pdev); | |
487 | pci_disable_device(pdev); | |
488 | } | |
489 | ||
490 | static void nitrox_shutdown(struct pci_dev *pdev) | |
491 | { | |
492 | pci_set_drvdata(pdev, NULL); | |
493 | pci_release_mem_regions(pdev); | |
494 | pci_disable_device(pdev); | |
495 | } | |
496 | ||
497 | static struct pci_driver nitrox_driver = { | |
498 | .name = nitrox_driver_name, | |
499 | .id_table = nitrox_pci_tbl, | |
500 | .probe = nitrox_probe, | |
501 | .remove = nitrox_remove, | |
502 | .shutdown = nitrox_shutdown, | |
41a9aca6 SJ |
503 | #ifdef CONFIG_PCI_IOV |
504 | .sriov_configure = nitrox_sriov_configure, | |
505 | #endif | |
14fa93cd SJ |
506 | }; |
507 | ||
508 | module_pci_driver(nitrox_driver); | |
509 | ||
510 | MODULE_AUTHOR("Srikanth Jampala <Jampala.Srikanth@cavium.com>"); | |
511 | MODULE_DESCRIPTION("Cavium CNN55XX PF Driver" DRIVER_VERSION " "); | |
512 | MODULE_LICENSE("GPL"); | |
513 | MODULE_VERSION(DRIVER_VERSION); | |
514 | MODULE_FIRMWARE(SE_FW); |