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1 /*
2  * CAAM control-plane driver backend
3  * Controller-level driver, kernel property detection, initialization
4  *
5  * Copyright 2008-2012 Freescale Semiconductor, Inc.
6  */
7
8 #include "compat.h"
9 #include "regs.h"
10 #include "intern.h"
11 #include "jr.h"
12 #include "desc_constr.h"
13 #include "error.h"
14 #include "ctrl.h"
15
16 /*
17  * Descriptor to instantiate RNG State Handle 0 in normal mode and
18  * load the JDKEK, TDKEK and TDSK registers
19  */
20 static void build_instantiation_desc(u32 *desc, int handle, int do_sk)
21 {
22         u32 *jump_cmd, op_flags;
23
24         init_job_desc(desc, 0);
25
26         op_flags = OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
27                         (handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INIT;
28
29         /* INIT RNG in non-test mode */
30         append_operation(desc, op_flags);
31
32         if (!handle && do_sk) {
33                 /*
34                  * For SH0, Secure Keys must be generated as well
35                  */
36
37                 /* wait for done */
38                 jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1);
39                 set_jump_tgt_here(desc, jump_cmd);
40
41                 /*
42                  * load 1 to clear written reg:
43                  * resets the done interrrupt and returns the RNG to idle.
44                  */
45                 append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW);
46
47                 /* Initialize State Handle  */
48                 append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
49                                  OP_ALG_AAI_RNG4_SK);
50         }
51
52         append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT);
53 }
54
55 /* Descriptor for deinstantiation of State Handle 0 of the RNG block. */
56 static void build_deinstantiation_desc(u32 *desc, int handle)
57 {
58         init_job_desc(desc, 0);
59
60         /* Uninstantiate State Handle 0 */
61         append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
62                          (handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INITFINAL);
63
64         append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT);
65 }
66
67 /*
68  * run_descriptor_deco0 - runs a descriptor on DECO0, under direct control of
69  *                        the software (no JR/QI used).
70  * @ctrldev - pointer to device
71  * @status - descriptor status, after being run
72  *
73  * Return: - 0 if no error occurred
74  *         - -ENODEV if the DECO couldn't be acquired
75  *         - -EAGAIN if an error occurred while executing the descriptor
76  */
77 static inline int run_descriptor_deco0(struct device *ctrldev, u32 *desc,
78                                         u32 *status)
79 {
80         struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
81         struct caam_full __iomem *topregs;
82         unsigned int timeout = 100000;
83         u32 deco_dbg_reg, flags;
84         int i;
85
86         /* Set the bit to request direct access to DECO0 */
87         topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
88         setbits32(&topregs->ctrl.deco_rq, DECORR_RQD0ENABLE);
89
90         while (!(rd_reg32(&topregs->ctrl.deco_rq) & DECORR_DEN0) &&
91                                                                  --timeout)
92                 cpu_relax();
93
94         if (!timeout) {
95                 dev_err(ctrldev, "failed to acquire DECO 0\n");
96                 clrbits32(&topregs->ctrl.deco_rq, DECORR_RQD0ENABLE);
97                 return -ENODEV;
98         }
99
100         for (i = 0; i < desc_len(desc); i++)
101                 wr_reg32(&topregs->deco.descbuf[i], *(desc + i));
102
103         flags = DECO_JQCR_WHL;
104         /*
105          * If the descriptor length is longer than 4 words, then the
106          * FOUR bit in JRCTRL register must be set.
107          */
108         if (desc_len(desc) >= 4)
109                 flags |= DECO_JQCR_FOUR;
110
111         /* Instruct the DECO to execute it */
112         wr_reg32(&topregs->deco.jr_ctl_hi, flags);
113
114         timeout = 10000000;
115         do {
116                 deco_dbg_reg = rd_reg32(&topregs->deco.desc_dbg);
117                 /*
118                  * If an error occured in the descriptor, then
119                  * the DECO status field will be set to 0x0D
120                  */
121                 if ((deco_dbg_reg & DESC_DBG_DECO_STAT_MASK) ==
122                     DESC_DBG_DECO_STAT_HOST_ERR)
123                         break;
124                 cpu_relax();
125         } while ((deco_dbg_reg & DESC_DBG_DECO_STAT_VALID) && --timeout);
126
127         *status = rd_reg32(&topregs->deco.op_status_hi) &
128                   DECO_OP_STATUS_HI_ERR_MASK;
129
130         /* Mark the DECO as free */
131         clrbits32(&topregs->ctrl.deco_rq, DECORR_RQD0ENABLE);
132
133         if (!timeout)
134                 return -EAGAIN;
135
136         return 0;
137 }
138
139 /*
140  * instantiate_rng - builds and executes a descriptor on DECO0,
141  *                   which initializes the RNG block.
142  * @ctrldev - pointer to device
143  * @state_handle_mask - bitmask containing the instantiation status
144  *                      for the RNG4 state handles which exist in
145  *                      the RNG4 block: 1 if it's been instantiated
146  *                      by an external entry, 0 otherwise.
147  * @gen_sk  - generate data to be loaded into the JDKEK, TDKEK and TDSK;
148  *            Caution: this can be done only once; if the keys need to be
149  *            regenerated, a POR is required
150  *
151  * Return: - 0 if no error occurred
152  *         - -ENOMEM if there isn't enough memory to allocate the descriptor
153  *         - -ENODEV if DECO0 couldn't be acquired
154  *         - -EAGAIN if an error occurred when executing the descriptor
155  *            f.i. there was a RNG hardware error due to not "good enough"
156  *            entropy being aquired.
157  */
158 static int instantiate_rng(struct device *ctrldev, int state_handle_mask,
159                            int gen_sk)
160 {
161         struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
162         struct caam_full __iomem *topregs;
163         struct rng4tst __iomem *r4tst;
164         u32 *desc, status, rdsta_val;
165         int ret = 0, sh_idx;
166
167         topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
168         r4tst = &topregs->ctrl.r4tst[0];
169
170         desc = kmalloc(CAAM_CMD_SZ * 7, GFP_KERNEL);
171         if (!desc)
172                 return -ENOMEM;
173
174         for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
175                 /*
176                  * If the corresponding bit is set, this state handle
177                  * was initialized by somebody else, so it's left alone.
178                  */
179                 if ((1 << sh_idx) & state_handle_mask)
180                         continue;
181
182                 /* Create the descriptor for instantiating RNG State Handle */
183                 build_instantiation_desc(desc, sh_idx, gen_sk);
184
185                 /* Try to run it through DECO0 */
186                 ret = run_descriptor_deco0(ctrldev, desc, &status);
187
188                 /*
189                  * If ret is not 0, or descriptor status is not 0, then
190                  * something went wrong. No need to try the next state
191                  * handle (if available), bail out here.
192                  * Also, if for some reason, the State Handle didn't get
193                  * instantiated although the descriptor has finished
194                  * without any error (HW optimizations for later
195                  * CAAM eras), then try again.
196                  */
197                 rdsta_val =
198                         rd_reg32(&topregs->ctrl.r4tst[0].rdsta) & RDSTA_IFMASK;
199                 if (status || !(rdsta_val & (1 << sh_idx)))
200                         ret = -EAGAIN;
201                 if (ret)
202                         break;
203
204                 dev_info(ctrldev, "Instantiated RNG4 SH%d\n", sh_idx);
205                 /* Clear the contents before recreating the descriptor */
206                 memset(desc, 0x00, CAAM_CMD_SZ * 7);
207         }
208
209         kfree(desc);
210
211         return ret;
212 }
213
214 /*
215  * deinstantiate_rng - builds and executes a descriptor on DECO0,
216  *                     which deinitializes the RNG block.
217  * @ctrldev - pointer to device
218  * @state_handle_mask - bitmask containing the instantiation status
219  *                      for the RNG4 state handles which exist in
220  *                      the RNG4 block: 1 if it's been instantiated
221  *
222  * Return: - 0 if no error occurred
223  *         - -ENOMEM if there isn't enough memory to allocate the descriptor
224  *         - -ENODEV if DECO0 couldn't be acquired
225  *         - -EAGAIN if an error occurred when executing the descriptor
226  */
227 static int deinstantiate_rng(struct device *ctrldev, int state_handle_mask)
228 {
229         u32 *desc, status;
230         int sh_idx, ret = 0;
231
232         desc = kmalloc(CAAM_CMD_SZ * 3, GFP_KERNEL);
233         if (!desc)
234                 return -ENOMEM;
235
236         for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) {
237                 /*
238                  * If the corresponding bit is set, then it means the state
239                  * handle was initialized by us, and thus it needs to be
240                  * deintialized as well
241                  */
242                 if ((1 << sh_idx) & state_handle_mask) {
243                         /*
244                          * Create the descriptor for deinstantating this state
245                          * handle
246                          */
247                         build_deinstantiation_desc(desc, sh_idx);
248
249                         /* Try to run it through DECO0 */
250                         ret = run_descriptor_deco0(ctrldev, desc, &status);
251
252                         if (ret || status) {
253                                 dev_err(ctrldev,
254                                         "Failed to deinstantiate RNG4 SH%d\n",
255                                         sh_idx);
256                                 break;
257                         }
258                         dev_info(ctrldev, "Deinstantiated RNG4 SH%d\n", sh_idx);
259                 }
260         }
261
262         kfree(desc);
263
264         return ret;
265 }
266
267 static int caam_remove(struct platform_device *pdev)
268 {
269         struct device *ctrldev;
270         struct caam_drv_private *ctrlpriv;
271         struct caam_drv_private_jr *jrpriv;
272         struct caam_full __iomem *topregs;
273         int ring, ret = 0;
274
275         ctrldev = &pdev->dev;
276         ctrlpriv = dev_get_drvdata(ctrldev);
277         topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
278
279         /* shut down JobRs */
280         for (ring = 0; ring < ctrlpriv->total_jobrs; ring++) {
281                 ret |= caam_jr_shutdown(ctrlpriv->jrdev[ring]);
282                 jrpriv = dev_get_drvdata(ctrlpriv->jrdev[ring]);
283                 irq_dispose_mapping(jrpriv->irq);
284         }
285
286         /* De-initialize RNG state handles initialized by this driver. */
287         if (ctrlpriv->rng4_sh_init)
288                 deinstantiate_rng(ctrldev, ctrlpriv->rng4_sh_init);
289
290         /* Shut down debug views */
291 #ifdef CONFIG_DEBUG_FS
292         debugfs_remove_recursive(ctrlpriv->dfs_root);
293 #endif
294
295         /* Unmap controller region */
296         iounmap(&topregs->ctrl);
297
298         kfree(ctrlpriv->jrdev);
299         kfree(ctrlpriv);
300
301         return ret;
302 }
303
304 /*
305  * kick_trng - sets the various parameters for enabling the initialization
306  *             of the RNG4 block in CAAM
307  * @pdev - pointer to the platform device
308  * @ent_delay - Defines the length (in system clocks) of each entropy sample.
309  */
310 static void kick_trng(struct platform_device *pdev, int ent_delay)
311 {
312         struct device *ctrldev = &pdev->dev;
313         struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
314         struct caam_full __iomem *topregs;
315         struct rng4tst __iomem *r4tst;
316         u32 val;
317
318         topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
319         r4tst = &topregs->ctrl.r4tst[0];
320
321         /* put RNG4 into program mode */
322         setbits32(&r4tst->rtmctl, RTMCTL_PRGM);
323
324         /*
325          * Performance-wise, it does not make sense to
326          * set the delay to a value that is lower
327          * than the last one that worked (i.e. the state handles
328          * were instantiated properly. Thus, instead of wasting
329          * time trying to set the values controlling the sample
330          * frequency, the function simply returns.
331          */
332         val = (rd_reg32(&r4tst->rtsdctl) & RTSDCTL_ENT_DLY_MASK)
333               >> RTSDCTL_ENT_DLY_SHIFT;
334         if (ent_delay <= val) {
335                 /* put RNG4 into run mode */
336                 clrbits32(&r4tst->rtmctl, RTMCTL_PRGM);
337                 return;
338         }
339
340         val = rd_reg32(&r4tst->rtsdctl);
341         val = (val & ~RTSDCTL_ENT_DLY_MASK) |
342               (ent_delay << RTSDCTL_ENT_DLY_SHIFT);
343         wr_reg32(&r4tst->rtsdctl, val);
344         /* min. freq. count, equal to 1/4 of the entropy sample length */
345         wr_reg32(&r4tst->rtfrqmin, ent_delay >> 2);
346         /* max. freq. count, equal to 8 times the entropy sample length */
347         wr_reg32(&r4tst->rtfrqmax, ent_delay << 3);
348         /* put RNG4 into run mode */
349         clrbits32(&r4tst->rtmctl, RTMCTL_PRGM);
350 }
351
352 /**
353  * caam_get_era() - Return the ERA of the SEC on SoC, based
354  * on the SEC_VID register.
355  * Returns the ERA number (1..4) or -ENOTSUPP if the ERA is unknown.
356  * @caam_id - the value of the SEC_VID register
357  **/
358 int caam_get_era(u64 caam_id)
359 {
360         struct sec_vid *sec_vid = (struct sec_vid *)&caam_id;
361         static const struct {
362                 u16 ip_id;
363                 u8 maj_rev;
364                 u8 era;
365         } caam_eras[] = {
366                 {0x0A10, 1, 1},
367                 {0x0A10, 2, 2},
368                 {0x0A12, 1, 3},
369                 {0x0A14, 1, 3},
370                 {0x0A14, 2, 4},
371                 {0x0A16, 1, 4},
372                 {0x0A11, 1, 4}
373         };
374         int i;
375
376         for (i = 0; i < ARRAY_SIZE(caam_eras); i++)
377                 if (caam_eras[i].ip_id == sec_vid->ip_id &&
378                         caam_eras[i].maj_rev == sec_vid->maj_rev)
379                                 return caam_eras[i].era;
380
381         return -ENOTSUPP;
382 }
383 EXPORT_SYMBOL(caam_get_era);
384
385 /* Probe routine for CAAM top (controller) level */
386 static int caam_probe(struct platform_device *pdev)
387 {
388         int ret, ring, rspec, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN;
389         u64 caam_id;
390         struct device *dev;
391         struct device_node *nprop, *np;
392         struct caam_ctrl __iomem *ctrl;
393         struct caam_full __iomem *topregs;
394         struct caam_drv_private *ctrlpriv;
395 #ifdef CONFIG_DEBUG_FS
396         struct caam_perfmon *perfmon;
397 #endif
398         u64 cha_vid;
399
400         ctrlpriv = kzalloc(sizeof(struct caam_drv_private), GFP_KERNEL);
401         if (!ctrlpriv)
402                 return -ENOMEM;
403
404         dev = &pdev->dev;
405         dev_set_drvdata(dev, ctrlpriv);
406         ctrlpriv->pdev = pdev;
407         nprop = pdev->dev.of_node;
408
409         /* Get configuration properties from device tree */
410         /* First, get register page */
411         ctrl = of_iomap(nprop, 0);
412         if (ctrl == NULL) {
413                 dev_err(dev, "caam: of_iomap() failed\n");
414                 return -ENOMEM;
415         }
416         ctrlpriv->ctrl = (struct caam_ctrl __force *)ctrl;
417
418         /* topregs used to derive pointers to CAAM sub-blocks only */
419         topregs = (struct caam_full __iomem *)ctrl;
420
421         /* Get the IRQ of the controller (for security violations only) */
422         ctrlpriv->secvio_irq = of_irq_to_resource(nprop, 0, NULL);
423
424         /*
425          * Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel,
426          * long pointers in master configuration register
427          */
428         setbits32(&topregs->ctrl.mcr, MCFGR_WDENABLE |
429                   (sizeof(dma_addr_t) == sizeof(u64) ? MCFGR_LONG_PTR : 0));
430
431         if (sizeof(dma_addr_t) == sizeof(u64))
432                 if (of_device_is_compatible(nprop, "fsl,sec-v5.0"))
433                         dma_set_mask(dev, DMA_BIT_MASK(40));
434                 else
435                         dma_set_mask(dev, DMA_BIT_MASK(36));
436         else
437                 dma_set_mask(dev, DMA_BIT_MASK(32));
438
439         /*
440          * Detect and enable JobRs
441          * First, find out how many ring spec'ed, allocate references
442          * for all, then go probe each one.
443          */
444         rspec = 0;
445         for_each_compatible_node(np, NULL, "fsl,sec-v4.0-job-ring")
446                 rspec++;
447         if (!rspec) {
448                 /* for backward compatible with device trees */
449                 for_each_compatible_node(np, NULL, "fsl,sec4.0-job-ring")
450                         rspec++;
451         }
452
453         ctrlpriv->jrdev = kzalloc(sizeof(struct device *) * rspec, GFP_KERNEL);
454         if (ctrlpriv->jrdev == NULL) {
455                 iounmap(&topregs->ctrl);
456                 return -ENOMEM;
457         }
458
459         ring = 0;
460         ctrlpriv->total_jobrs = 0;
461         for_each_compatible_node(np, NULL, "fsl,sec-v4.0-job-ring") {
462                 caam_jr_probe(pdev, np, ring);
463                 ctrlpriv->total_jobrs++;
464                 ring++;
465         }
466         if (!ring) {
467                 for_each_compatible_node(np, NULL, "fsl,sec4.0-job-ring") {
468                         caam_jr_probe(pdev, np, ring);
469                         ctrlpriv->total_jobrs++;
470                         ring++;
471                 }
472         }
473
474         /* Check to see if QI present. If so, enable */
475         ctrlpriv->qi_present = !!(rd_reg64(&topregs->ctrl.perfmon.comp_parms) &
476                                   CTPR_QI_MASK);
477         if (ctrlpriv->qi_present) {
478                 ctrlpriv->qi = (struct caam_queue_if __force *)&topregs->qi;
479                 /* This is all that's required to physically enable QI */
480                 wr_reg32(&topregs->qi.qi_control_lo, QICTL_DQEN);
481         }
482
483         /* If no QI and no rings specified, quit and go home */
484         if ((!ctrlpriv->qi_present) && (!ctrlpriv->total_jobrs)) {
485                 dev_err(dev, "no queues configured, terminating\n");
486                 caam_remove(pdev);
487                 return -ENOMEM;
488         }
489
490         cha_vid = rd_reg64(&topregs->ctrl.perfmon.cha_id);
491
492         /*
493          * If SEC has RNG version >= 4 and RNG state handle has not been
494          * already instantiated, do RNG instantiation
495          */
496         if ((cha_vid & CHA_ID_RNG_MASK) >> CHA_ID_RNG_SHIFT >= 4) {
497                 ctrlpriv->rng4_sh_init =
498                         rd_reg32(&topregs->ctrl.r4tst[0].rdsta);
499                 /*
500                  * If the secure keys (TDKEK, JDKEK, TDSK), were already
501                  * generated, signal this to the function that is instantiating
502                  * the state handles. An error would occur if RNG4 attempts
503                  * to regenerate these keys before the next POR.
504                  */
505                 gen_sk = ctrlpriv->rng4_sh_init & RDSTA_SKVN ? 0 : 1;
506                 ctrlpriv->rng4_sh_init &= RDSTA_IFMASK;
507                 do {
508                         int inst_handles =
509                                 rd_reg32(&topregs->ctrl.r4tst[0].rdsta) &
510                                                                 RDSTA_IFMASK;
511                         /*
512                          * If either SH were instantiated by somebody else
513                          * (e.g. u-boot) then it is assumed that the entropy
514                          * parameters are properly set and thus the function
515                          * setting these (kick_trng(...)) is skipped.
516                          * Also, if a handle was instantiated, do not change
517                          * the TRNG parameters.
518                          */
519                         if (!(ctrlpriv->rng4_sh_init || inst_handles)) {
520                                 kick_trng(pdev, ent_delay);
521                                 ent_delay += 400;
522                         }
523                         /*
524                          * if instantiate_rng(...) fails, the loop will rerun
525                          * and the kick_trng(...) function will modfiy the
526                          * upper and lower limits of the entropy sampling
527                          * interval, leading to a sucessful initialization of
528                          * the RNG.
529                          */
530                         ret = instantiate_rng(dev, inst_handles,
531                                               gen_sk);
532                 } while ((ret == -EAGAIN) && (ent_delay < RTSDCTL_ENT_DLY_MAX));
533                 if (ret) {
534                         dev_err(dev, "failed to instantiate RNG");
535                         caam_remove(pdev);
536                         return ret;
537                 }
538                 /*
539                  * Set handles init'ed by this module as the complement of the
540                  * already initialized ones
541                  */
542                 ctrlpriv->rng4_sh_init = ~ctrlpriv->rng4_sh_init & RDSTA_IFMASK;
543
544                 /* Enable RDB bit so that RNG works faster */
545                 setbits32(&topregs->ctrl.scfgr, SCFGR_RDBENABLE);
546         }
547
548         /* NOTE: RTIC detection ought to go here, around Si time */
549
550         caam_id = rd_reg64(&topregs->ctrl.perfmon.caam_id);
551
552         /* Report "alive" for developer to see */
553         dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id,
554                  caam_get_era(caam_id));
555         dev_info(dev, "job rings = %d, qi = %d\n",
556                  ctrlpriv->total_jobrs, ctrlpriv->qi_present);
557
558 #ifdef CONFIG_DEBUG_FS
559         /*
560          * FIXME: needs better naming distinction, as some amalgamation of
561          * "caam" and nprop->full_name. The OF name isn't distinctive,
562          * but does separate instances
563          */
564         perfmon = (struct caam_perfmon __force *)&ctrl->perfmon;
565
566         ctrlpriv->dfs_root = debugfs_create_dir("caam", NULL);
567         ctrlpriv->ctl = debugfs_create_dir("ctl", ctrlpriv->dfs_root);
568
569         /* Controller-level - performance monitor counters */
570         ctrlpriv->ctl_rq_dequeued =
571                 debugfs_create_u64("rq_dequeued",
572                                    S_IRUSR | S_IRGRP | S_IROTH,
573                                    ctrlpriv->ctl, &perfmon->req_dequeued);
574         ctrlpriv->ctl_ob_enc_req =
575                 debugfs_create_u64("ob_rq_encrypted",
576                                    S_IRUSR | S_IRGRP | S_IROTH,
577                                    ctrlpriv->ctl, &perfmon->ob_enc_req);
578         ctrlpriv->ctl_ib_dec_req =
579                 debugfs_create_u64("ib_rq_decrypted",
580                                    S_IRUSR | S_IRGRP | S_IROTH,
581                                    ctrlpriv->ctl, &perfmon->ib_dec_req);
582         ctrlpriv->ctl_ob_enc_bytes =
583                 debugfs_create_u64("ob_bytes_encrypted",
584                                    S_IRUSR | S_IRGRP | S_IROTH,
585                                    ctrlpriv->ctl, &perfmon->ob_enc_bytes);
586         ctrlpriv->ctl_ob_prot_bytes =
587                 debugfs_create_u64("ob_bytes_protected",
588                                    S_IRUSR | S_IRGRP | S_IROTH,
589                                    ctrlpriv->ctl, &perfmon->ob_prot_bytes);
590         ctrlpriv->ctl_ib_dec_bytes =
591                 debugfs_create_u64("ib_bytes_decrypted",
592                                    S_IRUSR | S_IRGRP | S_IROTH,
593                                    ctrlpriv->ctl, &perfmon->ib_dec_bytes);
594         ctrlpriv->ctl_ib_valid_bytes =
595                 debugfs_create_u64("ib_bytes_validated",
596                                    S_IRUSR | S_IRGRP | S_IROTH,
597                                    ctrlpriv->ctl, &perfmon->ib_valid_bytes);
598
599         /* Controller level - global status values */
600         ctrlpriv->ctl_faultaddr =
601                 debugfs_create_u64("fault_addr",
602                                    S_IRUSR | S_IRGRP | S_IROTH,
603                                    ctrlpriv->ctl, &perfmon->faultaddr);
604         ctrlpriv->ctl_faultdetail =
605                 debugfs_create_u32("fault_detail",
606                                    S_IRUSR | S_IRGRP | S_IROTH,
607                                    ctrlpriv->ctl, &perfmon->faultdetail);
608         ctrlpriv->ctl_faultstatus =
609                 debugfs_create_u32("fault_status",
610                                    S_IRUSR | S_IRGRP | S_IROTH,
611                                    ctrlpriv->ctl, &perfmon->status);
612
613         /* Internal covering keys (useful in non-secure mode only) */
614         ctrlpriv->ctl_kek_wrap.data = &ctrlpriv->ctrl->kek[0];
615         ctrlpriv->ctl_kek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
616         ctrlpriv->ctl_kek = debugfs_create_blob("kek",
617                                                 S_IRUSR |
618                                                 S_IRGRP | S_IROTH,
619                                                 ctrlpriv->ctl,
620                                                 &ctrlpriv->ctl_kek_wrap);
621
622         ctrlpriv->ctl_tkek_wrap.data = &ctrlpriv->ctrl->tkek[0];
623         ctrlpriv->ctl_tkek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
624         ctrlpriv->ctl_tkek = debugfs_create_blob("tkek",
625                                                  S_IRUSR |
626                                                  S_IRGRP | S_IROTH,
627                                                  ctrlpriv->ctl,
628                                                  &ctrlpriv->ctl_tkek_wrap);
629
630         ctrlpriv->ctl_tdsk_wrap.data = &ctrlpriv->ctrl->tdsk[0];
631         ctrlpriv->ctl_tdsk_wrap.size = KEK_KEY_SIZE * sizeof(u32);
632         ctrlpriv->ctl_tdsk = debugfs_create_blob("tdsk",
633                                                  S_IRUSR |
634                                                  S_IRGRP | S_IROTH,
635                                                  ctrlpriv->ctl,
636                                                  &ctrlpriv->ctl_tdsk_wrap);
637 #endif
638         return 0;
639 }
640
641 static struct of_device_id caam_match[] = {
642         {
643                 .compatible = "fsl,sec-v4.0",
644         },
645         {
646                 .compatible = "fsl,sec4.0",
647         },
648         {},
649 };
650 MODULE_DEVICE_TABLE(of, caam_match);
651
652 static struct platform_driver caam_driver = {
653         .driver = {
654                 .name = "caam",
655                 .owner = THIS_MODULE,
656                 .of_match_table = caam_match,
657         },
658         .probe       = caam_probe,
659         .remove      = caam_remove,
660 };
661
662 module_platform_driver(caam_driver);
663
664 MODULE_LICENSE("GPL");
665 MODULE_DESCRIPTION("FSL CAAM request backend");
666 MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");