crypto: caam - add support for sha512 variants of existing AEAD algorithms
[linux-2.6.git] / drivers / crypto / caam / ctrl.c
1 /*
2  * CAAM control-plane driver backend
3  * Controller-level driver, kernel property detection, initialization
4  *
5  * Copyright 2008-2011 Freescale Semiconductor, Inc.
6  */
7
8 #include "compat.h"
9 #include "regs.h"
10 #include "intern.h"
11 #include "jr.h"
12
13 static int caam_remove(struct platform_device *pdev)
14 {
15         struct device *ctrldev;
16         struct caam_drv_private *ctrlpriv;
17         struct caam_drv_private_jr *jrpriv;
18         struct caam_full __iomem *topregs;
19         int ring, ret = 0;
20
21         ctrldev = &pdev->dev;
22         ctrlpriv = dev_get_drvdata(ctrldev);
23         topregs = (struct caam_full __iomem *)ctrlpriv->ctrl;
24
25         /* shut down JobRs */
26         for (ring = 0; ring < ctrlpriv->total_jobrs; ring++) {
27                 ret |= caam_jr_shutdown(ctrlpriv->jrdev[ring]);
28                 jrpriv = dev_get_drvdata(ctrlpriv->jrdev[ring]);
29                 irq_dispose_mapping(jrpriv->irq);
30         }
31
32         /* Shut down debug views */
33 #ifdef CONFIG_DEBUG_FS
34         debugfs_remove_recursive(ctrlpriv->dfs_root);
35 #endif
36
37         /* Unmap controller region */
38         iounmap(&topregs->ctrl);
39
40         kfree(ctrlpriv->jrdev);
41         kfree(ctrlpriv);
42
43         return ret;
44 }
45
46 /* Probe routine for CAAM top (controller) level */
47 static int caam_probe(struct platform_device *pdev)
48 {
49         int d, ring, rspec;
50         struct device *dev;
51         struct device_node *nprop, *np;
52         struct caam_ctrl __iomem *ctrl;
53         struct caam_full __iomem *topregs;
54         struct caam_drv_private *ctrlpriv;
55         struct caam_perfmon *perfmon;
56         struct caam_deco **deco;
57         u32 deconum;
58
59         ctrlpriv = kzalloc(sizeof(struct caam_drv_private), GFP_KERNEL);
60         if (!ctrlpriv)
61                 return -ENOMEM;
62
63         dev = &pdev->dev;
64         dev_set_drvdata(dev, ctrlpriv);
65         ctrlpriv->pdev = pdev;
66         nprop = pdev->dev.of_node;
67
68         /* Get configuration properties from device tree */
69         /* First, get register page */
70         ctrl = of_iomap(nprop, 0);
71         if (ctrl == NULL) {
72                 dev_err(dev, "caam: of_iomap() failed\n");
73                 return -ENOMEM;
74         }
75         ctrlpriv->ctrl = (struct caam_ctrl __force *)ctrl;
76
77         /* topregs used to derive pointers to CAAM sub-blocks only */
78         topregs = (struct caam_full __iomem *)ctrl;
79
80         /* Get the IRQ of the controller (for security violations only) */
81         ctrlpriv->secvio_irq = of_irq_to_resource(nprop, 0, NULL);
82
83         /*
84          * Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel,
85          * 36-bit pointers in master configuration register
86          */
87         setbits32(&topregs->ctrl.mcr, MCFGR_WDENABLE |
88                   (sizeof(dma_addr_t) == sizeof(u64) ? MCFGR_LONG_PTR : 0));
89
90         if (sizeof(dma_addr_t) == sizeof(u64))
91                 dma_set_mask(dev, DMA_BIT_MASK(36));
92
93         /* Find out how many DECOs are present */
94         deconum = (rd_reg64(&topregs->ctrl.perfmon.cha_num) &
95                    CHA_NUM_DECONUM_MASK) >> CHA_NUM_DECONUM_SHIFT;
96
97         ctrlpriv->deco = kmalloc(deconum * sizeof(struct caam_deco *),
98                                  GFP_KERNEL);
99
100         deco = (struct caam_deco __force **)&topregs->deco;
101         for (d = 0; d < deconum; d++)
102                 ctrlpriv->deco[d] = deco[d];
103
104         /*
105          * Detect and enable JobRs
106          * First, find out how many ring spec'ed, allocate references
107          * for all, then go probe each one.
108          */
109         rspec = 0;
110         for_each_compatible_node(np, NULL, "fsl,sec-v4.0-job-ring")
111                 rspec++;
112         ctrlpriv->jrdev = kzalloc(sizeof(struct device *) * rspec, GFP_KERNEL);
113         if (ctrlpriv->jrdev == NULL) {
114                 iounmap(&topregs->ctrl);
115                 return -ENOMEM;
116         }
117
118         ring = 0;
119         ctrlpriv->total_jobrs = 0;
120         for_each_compatible_node(np, NULL, "fsl,sec-v4.0-job-ring") {
121                 caam_jr_probe(pdev, np, ring);
122                 ctrlpriv->total_jobrs++;
123                 ring++;
124         }
125
126         /* Check to see if QI present. If so, enable */
127         ctrlpriv->qi_present = !!(rd_reg64(&topregs->ctrl.perfmon.comp_parms) &
128                                   CTPR_QI_MASK);
129         if (ctrlpriv->qi_present) {
130                 ctrlpriv->qi = (struct caam_queue_if __force *)&topregs->qi;
131                 /* This is all that's required to physically enable QI */
132                 wr_reg32(&topregs->qi.qi_control_lo, QICTL_DQEN);
133         }
134
135         /* If no QI and no rings specified, quit and go home */
136         if ((!ctrlpriv->qi_present) && (!ctrlpriv->total_jobrs)) {
137                 dev_err(dev, "no queues configured, terminating\n");
138                 caam_remove(pdev);
139                 return -ENOMEM;
140         }
141
142         /* NOTE: RTIC detection ought to go here, around Si time */
143
144         /* Initialize queue allocator lock */
145         spin_lock_init(&ctrlpriv->jr_alloc_lock);
146
147         /* Report "alive" for developer to see */
148         dev_info(dev, "device ID = 0x%016llx\n",
149                  rd_reg64(&topregs->ctrl.perfmon.caam_id));
150         dev_info(dev, "job rings = %d, qi = %d\n",
151                  ctrlpriv->total_jobrs, ctrlpriv->qi_present);
152
153 #ifdef CONFIG_DEBUG_FS
154         /*
155          * FIXME: needs better naming distinction, as some amalgamation of
156          * "caam" and nprop->full_name. The OF name isn't distinctive,
157          * but does separate instances
158          */
159         perfmon = (struct caam_perfmon __force *)&ctrl->perfmon;
160
161         ctrlpriv->dfs_root = debugfs_create_dir("caam", NULL);
162         ctrlpriv->ctl = debugfs_create_dir("ctl", ctrlpriv->dfs_root);
163
164         /* Controller-level - performance monitor counters */
165         ctrlpriv->ctl_rq_dequeued =
166                 debugfs_create_u64("rq_dequeued",
167                                    S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
168                                    ctrlpriv->ctl, &perfmon->req_dequeued);
169         ctrlpriv->ctl_ob_enc_req =
170                 debugfs_create_u64("ob_rq_encrypted",
171                                    S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
172                                    ctrlpriv->ctl, &perfmon->ob_enc_req);
173         ctrlpriv->ctl_ib_dec_req =
174                 debugfs_create_u64("ib_rq_decrypted",
175                                    S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
176                                    ctrlpriv->ctl, &perfmon->ib_dec_req);
177         ctrlpriv->ctl_ob_enc_bytes =
178                 debugfs_create_u64("ob_bytes_encrypted",
179                                    S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
180                                    ctrlpriv->ctl, &perfmon->ob_enc_bytes);
181         ctrlpriv->ctl_ob_prot_bytes =
182                 debugfs_create_u64("ob_bytes_protected",
183                                    S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
184                                    ctrlpriv->ctl, &perfmon->ob_prot_bytes);
185         ctrlpriv->ctl_ib_dec_bytes =
186                 debugfs_create_u64("ib_bytes_decrypted",
187                                    S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
188                                    ctrlpriv->ctl, &perfmon->ib_dec_bytes);
189         ctrlpriv->ctl_ib_valid_bytes =
190                 debugfs_create_u64("ib_bytes_validated",
191                                    S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
192                                    ctrlpriv->ctl, &perfmon->ib_valid_bytes);
193
194         /* Controller level - global status values */
195         ctrlpriv->ctl_faultaddr =
196                 debugfs_create_u64("fault_addr",
197                                    S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
198                                    ctrlpriv->ctl, &perfmon->faultaddr);
199         ctrlpriv->ctl_faultdetail =
200                 debugfs_create_u32("fault_detail",
201                                    S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
202                                    ctrlpriv->ctl, &perfmon->faultdetail);
203         ctrlpriv->ctl_faultstatus =
204                 debugfs_create_u32("fault_status",
205                                    S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
206                                    ctrlpriv->ctl, &perfmon->status);
207
208         /* Internal covering keys (useful in non-secure mode only) */
209         ctrlpriv->ctl_kek_wrap.data = &ctrlpriv->ctrl->kek[0];
210         ctrlpriv->ctl_kek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
211         ctrlpriv->ctl_kek = debugfs_create_blob("kek",
212                                                 S_IFCHR | S_IRUSR |
213                                                 S_IRGRP | S_IROTH,
214                                                 ctrlpriv->ctl,
215                                                 &ctrlpriv->ctl_kek_wrap);
216
217         ctrlpriv->ctl_tkek_wrap.data = &ctrlpriv->ctrl->tkek[0];
218         ctrlpriv->ctl_tkek_wrap.size = KEK_KEY_SIZE * sizeof(u32);
219         ctrlpriv->ctl_tkek = debugfs_create_blob("tkek",
220                                                  S_IFCHR | S_IRUSR |
221                                                  S_IRGRP | S_IROTH,
222                                                  ctrlpriv->ctl,
223                                                  &ctrlpriv->ctl_tkek_wrap);
224
225         ctrlpriv->ctl_tdsk_wrap.data = &ctrlpriv->ctrl->tdsk[0];
226         ctrlpriv->ctl_tdsk_wrap.size = KEK_KEY_SIZE * sizeof(u32);
227         ctrlpriv->ctl_tdsk = debugfs_create_blob("tdsk",
228                                                  S_IFCHR | S_IRUSR |
229                                                  S_IRGRP | S_IROTH,
230                                                  ctrlpriv->ctl,
231                                                  &ctrlpriv->ctl_tdsk_wrap);
232 #endif
233         return 0;
234 }
235
236 static struct of_device_id caam_match[] = {
237         {
238                 .compatible = "fsl,sec-v4.0",
239         },
240         {},
241 };
242 MODULE_DEVICE_TABLE(of, caam_match);
243
244 static struct platform_driver caam_driver = {
245         .driver = {
246                 .name = "caam",
247                 .owner = THIS_MODULE,
248                 .of_match_table = caam_match,
249         },
250         .probe       = caam_probe,
251         .remove      = __devexit_p(caam_remove),
252 };
253
254 static int __init caam_base_init(void)
255 {
256         return platform_driver_register(&caam_driver);
257 }
258
259 static void __exit caam_base_exit(void)
260 {
261         return platform_driver_unregister(&caam_driver);
262 }
263
264 module_init(caam_base_init);
265 module_exit(caam_base_exit);
266
267 MODULE_LICENSE("GPL");
268 MODULE_DESCRIPTION("FSL CAAM request backend");
269 MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");