Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
[sfrench/cifs-2.6.git] / drivers / crypto / cavium / nitrox / nitrox_main.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <linux/aer.h>
3 #include <linux/delay.h>
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"
14 #include "nitrox_hal.h"
15 #include "nitrox_isr.h"
16 #include "nitrox_debugfs.h"
17
18 #define CNN55XX_DEV_ID  0x12
19 #define UCODE_HLEN 48
20 #define SE_GROUP 0
21
22 #define DRIVER_VERSION "1.1"
23 #define FW_DIR "cavium/"
24 /* SE microcode */
25 #define SE_FW   FW_DIR "cnn55xx_se.fw"
26
27 static const char nitrox_driver_name[] = "CNN55XX";
28
29 static LIST_HEAD(ndevlist);
30 static DEFINE_MUTEX(devlist_lock);
31 static unsigned int num_devices;
32
33 /**
34  * nitrox_pci_tbl - PCI Device ID Table
35  */
36 static const struct pci_device_id nitrox_pci_tbl[] = {
37         {PCI_VDEVICE(CAVIUM, CNN55XX_DEV_ID), 0},
38         /* required last entry */
39         {0, }
40 };
41 MODULE_DEVICE_TABLE(pci, nitrox_pci_tbl);
42
43 static unsigned int qlen = DEFAULT_CMD_QLEN;
44 module_param(qlen, uint, 0644);
45 MODULE_PARM_DESC(qlen, "Command queue length - default 2048");
46
47 #ifdef CONFIG_PCI_IOV
48 int nitrox_sriov_configure(struct pci_dev *pdev, int num_vfs);
49 #else
50 int nitrox_sriov_configure(struct pci_dev *pdev, int num_vfs)
51 {
52         return 0;
53 }
54 #endif
55
56 /**
57  * struct ucode - Firmware Header
58  * @id: microcode ID
59  * @version: firmware version
60  * @code_size: code section size
61  * @raz: alignment
62  * @code: code section
63  */
64 struct ucode {
65         u8 id;
66         char version[VERSION_LEN - 1];
67         __be32 code_size;
68         u8 raz[12];
69         u64 code[0];
70 };
71
72 /**
73  * write_to_ucd_unit - Write Firmware to NITROX UCD unit
74  */
75 static void write_to_ucd_unit(struct nitrox_device *ndev,
76                               struct ucode *ucode)
77 {
78         u32 code_size = be32_to_cpu(ucode->code_size) * 2;
79         u64 offset, data;
80         int i = 0;
81
82         /*
83          * UCD structure
84          *
85          *  -------------
86          *  |    BLK 7  |
87          *  -------------
88          *  |    BLK 6  |
89          *  -------------
90          *  |    ...    |
91          *  -------------
92          *  |    BLK 0  |
93          *  -------------
94          *  Total of 8 blocks, each size 32KB
95          */
96
97         /* set the block number */
98         offset = UCD_UCODE_LOAD_BLOCK_NUM;
99         nitrox_write_csr(ndev, offset, 0);
100
101         code_size = roundup(code_size, 8);
102         while (code_size) {
103                 data = ucode->code[i];
104                 /* write 8 bytes at a time */
105                 offset = UCD_UCODE_LOAD_IDX_DATAX(i);
106                 nitrox_write_csr(ndev, offset, data);
107                 code_size -= 8;
108                 i++;
109         }
110
111         /* put all SE cores in group 0 */
112         offset = POM_GRP_EXECMASKX(SE_GROUP);
113         nitrox_write_csr(ndev, offset, (~0ULL));
114
115         for (i = 0; i < ndev->hw.se_cores; i++) {
116                 /*
117                  * write block number and firware length
118                  * bit:<2:0> block number
119                  * bit:3 is set SE uses 32KB microcode
120                  * bit:3 is clear SE uses 64KB microcode
121                  */
122                 offset = UCD_SE_EID_UCODE_BLOCK_NUMX(i);
123                 nitrox_write_csr(ndev, offset, 0x8);
124         }
125         usleep_range(300, 400);
126 }
127
128 static int nitrox_load_fw(struct nitrox_device *ndev, const char *fw_name)
129 {
130         const struct firmware *fw;
131         struct ucode *ucode;
132         int ret;
133
134         dev_info(DEV(ndev), "Loading firmware \"%s\"\n", fw_name);
135
136         ret = request_firmware(&fw, fw_name, DEV(ndev));
137         if (ret < 0) {
138                 dev_err(DEV(ndev), "failed to get firmware %s\n", fw_name);
139                 return ret;
140         }
141
142         ucode = (struct ucode *)fw->data;
143         /* copy the firmware version */
144         memcpy(ndev->hw.fw_name, ucode->version, (VERSION_LEN - 2));
145         ndev->hw.fw_name[VERSION_LEN - 1] = '\0';
146
147         write_to_ucd_unit(ndev, ucode);
148         release_firmware(fw);
149
150         return 0;
151 }
152
153 /**
154  * nitrox_add_to_devlist - add NITROX device to global device list
155  * @ndev: NITROX device
156  */
157 static int nitrox_add_to_devlist(struct nitrox_device *ndev)
158 {
159         struct nitrox_device *dev;
160         int ret = 0;
161
162         INIT_LIST_HEAD(&ndev->list);
163         refcount_set(&ndev->refcnt, 1);
164
165         mutex_lock(&devlist_lock);
166         list_for_each_entry(dev, &ndevlist, list) {
167                 if (dev == ndev) {
168                         ret = -EEXIST;
169                         goto unlock;
170                 }
171         }
172         ndev->idx = num_devices++;
173         list_add_tail(&ndev->list, &ndevlist);
174 unlock:
175         mutex_unlock(&devlist_lock);
176         return ret;
177 }
178
179 /**
180  * nitrox_remove_from_devlist - remove NITROX device from
181  *   global device list
182  * @ndev: NITROX device
183  */
184 static void nitrox_remove_from_devlist(struct nitrox_device *ndev)
185 {
186         mutex_lock(&devlist_lock);
187         list_del(&ndev->list);
188         num_devices--;
189         mutex_unlock(&devlist_lock);
190 }
191
192 struct nitrox_device *nitrox_get_first_device(void)
193 {
194         struct nitrox_device *ndev = NULL;
195
196         mutex_lock(&devlist_lock);
197         list_for_each_entry(ndev, &ndevlist, list) {
198                 if (nitrox_ready(ndev))
199                         break;
200         }
201         mutex_unlock(&devlist_lock);
202         if (!ndev)
203                 return NULL;
204
205         refcount_inc(&ndev->refcnt);
206         /* barrier to sync with other cpus */
207         smp_mb__after_atomic();
208         return ndev;
209 }
210
211 void nitrox_put_device(struct nitrox_device *ndev)
212 {
213         if (!ndev)
214                 return;
215
216         refcount_dec(&ndev->refcnt);
217         /* barrier to sync with other cpus */
218         smp_mb__after_atomic();
219 }
220
221 static int nitrox_device_flr(struct pci_dev *pdev)
222 {
223         int pos = 0;
224
225         pos = pci_save_state(pdev);
226         if (pos) {
227                 dev_err(&pdev->dev, "Failed to save pci state\n");
228                 return -ENOMEM;
229         }
230
231         /* check flr support */
232         if (pcie_has_flr(pdev))
233                 pcie_flr(pdev);
234
235         pci_restore_state(pdev);
236
237         return 0;
238 }
239
240 static int nitrox_pf_sw_init(struct nitrox_device *ndev)
241 {
242         int err;
243
244         err = nitrox_common_sw_init(ndev);
245         if (err)
246                 return err;
247
248         err = nitrox_register_interrupts(ndev);
249         if (err)
250                 nitrox_common_sw_cleanup(ndev);
251
252         return err;
253 }
254
255 static void nitrox_pf_sw_cleanup(struct nitrox_device *ndev)
256 {
257         nitrox_unregister_interrupts(ndev);
258         nitrox_common_sw_cleanup(ndev);
259 }
260
261 /**
262  * nitrox_bist_check - Check NITORX BIST registers status
263  * @ndev: NITROX device
264  */
265 static int nitrox_bist_check(struct nitrox_device *ndev)
266 {
267         u64 value = 0;
268         int i;
269
270         for (i = 0; i < NR_CLUSTERS; i++) {
271                 value += nitrox_read_csr(ndev, EMU_BIST_STATUSX(i));
272                 value += nitrox_read_csr(ndev, EFL_CORE_BIST_REGX(i));
273         }
274         value += nitrox_read_csr(ndev, UCD_BIST_STATUS);
275         value += nitrox_read_csr(ndev, NPS_CORE_BIST_REG);
276         value += nitrox_read_csr(ndev, NPS_CORE_NPC_BIST_REG);
277         value += nitrox_read_csr(ndev, NPS_PKT_SLC_BIST_REG);
278         value += nitrox_read_csr(ndev, NPS_PKT_IN_BIST_REG);
279         value += nitrox_read_csr(ndev, POM_BIST_REG);
280         value += nitrox_read_csr(ndev, BMI_BIST_REG);
281         value += nitrox_read_csr(ndev, EFL_TOP_BIST_STAT);
282         value += nitrox_read_csr(ndev, BMO_BIST_REG);
283         value += nitrox_read_csr(ndev, LBC_BIST_STATUS);
284         value += nitrox_read_csr(ndev, PEM_BIST_STATUSX(0));
285         if (value)
286                 return -EIO;
287         return 0;
288 }
289
290 static int nitrox_pf_hw_init(struct nitrox_device *ndev)
291 {
292         int err;
293
294         err = nitrox_bist_check(ndev);
295         if (err) {
296                 dev_err(&ndev->pdev->dev, "BIST check failed\n");
297                 return err;
298         }
299         /* get cores information */
300         nitrox_get_hwinfo(ndev);
301
302         nitrox_config_nps_unit(ndev);
303         nitrox_config_pom_unit(ndev);
304         nitrox_config_efl_unit(ndev);
305         /* configure IO units */
306         nitrox_config_bmi_unit(ndev);
307         nitrox_config_bmo_unit(ndev);
308         /* configure Local Buffer Cache */
309         nitrox_config_lbc_unit(ndev);
310         nitrox_config_rand_unit(ndev);
311
312         /* load firmware on SE cores */
313         err = nitrox_load_fw(ndev, SE_FW);
314         if (err)
315                 return err;
316
317         nitrox_config_emu_unit(ndev);
318
319         return 0;
320 }
321
322 /**
323  * nitrox_probe - NITROX Initialization function.
324  * @pdev: PCI device information struct
325  * @id: entry in nitrox_pci_tbl
326  *
327  * Return: 0, if the driver is bound to the device, or
328  *         a negative error if there is failure.
329  */
330 static int nitrox_probe(struct pci_dev *pdev,
331                         const struct pci_device_id *id)
332 {
333         struct nitrox_device *ndev;
334         int err;
335
336         dev_info_once(&pdev->dev, "%s driver version %s\n",
337                       nitrox_driver_name, DRIVER_VERSION);
338
339         err = pci_enable_device_mem(pdev);
340         if (err)
341                 return err;
342
343         /* do FLR */
344         err = nitrox_device_flr(pdev);
345         if (err) {
346                 dev_err(&pdev->dev, "FLR failed\n");
347                 pci_disable_device(pdev);
348                 return err;
349         }
350
351         if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
352                 dev_dbg(&pdev->dev, "DMA to 64-BIT address\n");
353         } else {
354                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
355                 if (err) {
356                         dev_err(&pdev->dev, "DMA configuration failed\n");
357                         pci_disable_device(pdev);
358                         return err;
359                 }
360         }
361
362         err = pci_request_mem_regions(pdev, nitrox_driver_name);
363         if (err) {
364                 pci_disable_device(pdev);
365                 return err;
366         }
367         pci_set_master(pdev);
368
369         ndev = kzalloc(sizeof(*ndev), GFP_KERNEL);
370         if (!ndev) {
371                 err = -ENOMEM;
372                 goto ndev_fail;
373         }
374
375         pci_set_drvdata(pdev, ndev);
376         ndev->pdev = pdev;
377
378         /* add to device list */
379         nitrox_add_to_devlist(ndev);
380
381         ndev->hw.vendor_id = pdev->vendor;
382         ndev->hw.device_id = pdev->device;
383         ndev->hw.revision_id = pdev->revision;
384         /* command timeout in jiffies */
385         ndev->timeout = msecs_to_jiffies(CMD_TIMEOUT);
386         ndev->node = dev_to_node(&pdev->dev);
387         if (ndev->node == NUMA_NO_NODE)
388                 ndev->node = 0;
389
390         ndev->bar_addr = ioremap(pci_resource_start(pdev, 0),
391                                  pci_resource_len(pdev, 0));
392         if (!ndev->bar_addr) {
393                 err = -EIO;
394                 goto ioremap_err;
395         }
396         /* allocate command queus based on cpus, max queues are 64 */
397         ndev->nr_queues = min_t(u32, MAX_PF_QUEUES, num_online_cpus());
398         ndev->qlen = qlen;
399
400         err = nitrox_pf_sw_init(ndev);
401         if (err)
402                 goto ioremap_err;
403
404         err = nitrox_pf_hw_init(ndev);
405         if (err)
406                 goto pf_hw_fail;
407
408         nitrox_debugfs_init(ndev);
409
410         /* clear the statistics */
411         atomic64_set(&ndev->stats.posted, 0);
412         atomic64_set(&ndev->stats.completed, 0);
413         atomic64_set(&ndev->stats.dropped, 0);
414
415         atomic_set(&ndev->state, __NDEV_READY);
416         /* barrier to sync with other cpus */
417         smp_mb__after_atomic();
418
419         err = nitrox_crypto_register();
420         if (err)
421                 goto crypto_fail;
422
423         return 0;
424
425 crypto_fail:
426         nitrox_debugfs_exit(ndev);
427         atomic_set(&ndev->state, __NDEV_NOT_READY);
428         /* barrier to sync with other cpus */
429         smp_mb__after_atomic();
430 pf_hw_fail:
431         nitrox_pf_sw_cleanup(ndev);
432 ioremap_err:
433         nitrox_remove_from_devlist(ndev);
434         kfree(ndev);
435         pci_set_drvdata(pdev, NULL);
436 ndev_fail:
437         pci_release_mem_regions(pdev);
438         pci_disable_device(pdev);
439         return err;
440 }
441
442 /**
443  * nitrox_remove - Unbind the driver from the device.
444  * @pdev: PCI device information struct
445  */
446 static void nitrox_remove(struct pci_dev *pdev)
447 {
448         struct nitrox_device *ndev = pci_get_drvdata(pdev);
449
450         if (!ndev)
451                 return;
452
453         if (!refcount_dec_and_test(&ndev->refcnt)) {
454                 dev_err(DEV(ndev), "Device refcnt not zero (%d)\n",
455                         refcount_read(&ndev->refcnt));
456                 return;
457         }
458
459         dev_info(DEV(ndev), "Removing Device %x:%x\n",
460                  ndev->hw.vendor_id, ndev->hw.device_id);
461
462         atomic_set(&ndev->state, __NDEV_NOT_READY);
463         /* barrier to sync with other cpus */
464         smp_mb__after_atomic();
465
466         nitrox_remove_from_devlist(ndev);
467
468 #ifdef CONFIG_PCI_IOV
469         /* disable SR-IOV */
470         nitrox_sriov_configure(pdev, 0);
471 #endif
472         nitrox_crypto_unregister();
473         nitrox_debugfs_exit(ndev);
474         nitrox_pf_sw_cleanup(ndev);
475
476         iounmap(ndev->bar_addr);
477         kfree(ndev);
478
479         pci_set_drvdata(pdev, NULL);
480         pci_release_mem_regions(pdev);
481         pci_disable_device(pdev);
482 }
483
484 static void nitrox_shutdown(struct pci_dev *pdev)
485 {
486         pci_set_drvdata(pdev, NULL);
487         pci_release_mem_regions(pdev);
488         pci_disable_device(pdev);
489 }
490
491 static struct pci_driver nitrox_driver = {
492         .name = nitrox_driver_name,
493         .id_table = nitrox_pci_tbl,
494         .probe = nitrox_probe,
495         .remove = nitrox_remove,
496         .shutdown = nitrox_shutdown,
497 #ifdef CONFIG_PCI_IOV
498         .sriov_configure = nitrox_sriov_configure,
499 #endif
500 };
501
502 module_pci_driver(nitrox_driver);
503
504 MODULE_AUTHOR("Srikanth Jampala <Jampala.Srikanth@cavium.com>");
505 MODULE_DESCRIPTION("Cavium CNN55XX PF Driver" DRIVER_VERSION " ");
506 MODULE_LICENSE("GPL");
507 MODULE_VERSION(DRIVER_VERSION);
508 MODULE_FIRMWARE(SE_FW);