tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * CAAM/SEC 4.x driver backend
4 * Private/internal definitions between modules
5 *
6 * Copyright 2008-2011 Freescale Semiconductor, Inc.
7 * Copyright 2019 NXP
8 */
9
10#ifndef INTERN_H
11#define INTERN_H
12
13#include "ctrl.h"
14#include <crypto/engine.h>
15
16/* Currently comes from Kconfig param as a ^2 (driver-required) */
17#define JOBR_DEPTH (1 << CONFIG_CRYPTO_DEV_FSL_CAAM_RINGSIZE)
18
19/*
20 * Maximum size for crypto-engine software queue based on Job Ring
21 * size (JOBR_DEPTH) and a THRESHOLD (reserved for the non-crypto-API
22 * requests that are not passed through crypto-engine)
23 */
24#define THRESHOLD 15
25#define CRYPTO_ENGINE_MAX_QLEN (JOBR_DEPTH - THRESHOLD)
26
27/* Kconfig params for interrupt coalescing if selected (else zero) */
28#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_INTC
29#define JOBR_INTC JRCFG_ICEN
30#define JOBR_INTC_TIME_THLD CONFIG_CRYPTO_DEV_FSL_CAAM_INTC_TIME_THLD
31#define JOBR_INTC_COUNT_THLD CONFIG_CRYPTO_DEV_FSL_CAAM_INTC_COUNT_THLD
32#else
33#define JOBR_INTC 0
34#define JOBR_INTC_TIME_THLD 0
35#define JOBR_INTC_COUNT_THLD 0
36#endif
37
38/*
39 * Storage for tracking each in-process entry moving across a ring
40 * Each entry on an output ring needs one of these
41 */
42struct caam_jrentry_info {
43 void (*callbk)(struct device *dev, u32 *desc, u32 status, void *arg);
44 void *cbkarg; /* Argument per ring entry */
45 u32 *desc_addr_virt; /* Stored virt addr for postprocessing */
46 dma_addr_t desc_addr_dma; /* Stored bus addr for done matching */
47 u32 desc_size; /* Stored size for postprocessing, header derived */
48};
49
50/* Private sub-storage for a single JobR */
51struct caam_drv_private_jr {
52 struct list_head list_node; /* Job Ring device list */
53 struct device *dev;
54 int ridx;
55 struct caam_job_ring __iomem *rregs; /* JobR's register space */
56 struct tasklet_struct irqtask;
57 int irq; /* One per queue */
58 bool hwrng;
59
60 /* Number of scatterlist crypt transforms active on the JobR */
61 atomic_t tfm_count ____cacheline_aligned;
62
63 /* Job ring info */
64 struct caam_jrentry_info *entinfo; /* Alloc'ed 1 per ring entry */
65 spinlock_t inplock ____cacheline_aligned; /* Input ring index lock */
66 u32 inpring_avail; /* Number of free entries in input ring */
67 int head; /* entinfo (s/w ring) head index */
68 void *inpring; /* Base of input ring, alloc
69 * DMA-safe */
70 int out_ring_read_index; /* Output index "tail" */
71 int tail; /* entinfo (s/w ring) tail index */
72 void *outring; /* Base of output ring, DMA-safe */
73 struct crypto_engine *engine;
74};
75
76/*
77 * Driver-private storage for a single CAAM block instance
78 */
79struct caam_drv_private {
80 /* Physical-presence section */
81 struct caam_ctrl __iomem *ctrl; /* controller region */
82 struct caam_deco __iomem *deco; /* DECO/CCB views */
83 struct caam_assurance __iomem *assure;
84 struct caam_queue_if __iomem *qi; /* QI control region */
85 struct caam_job_ring __iomem *jr[4]; /* JobR's register space */
86
87 struct iommu_domain *domain;
88
89 /*
90 * Detected geometry block. Filled in from device tree if powerpc,
91 * or from register-based version detection code
92 */
93 u8 total_jobrs; /* Total Job Rings in device */
94 u8 qi_present; /* Nonzero if QI present in device */
95 u8 blob_present; /* Nonzero if BLOB support present in device */
96 u8 mc_en; /* Nonzero if MC f/w is active */
97 int secvio_irq; /* Security violation interrupt number */
98 int virt_en; /* Virtualization enabled in CAAM */
99 int era; /* CAAM Era (internal HW revision) */
100
101#define RNG4_MAX_HANDLES 2
102 /* RNG4 block */
103 u32 rng4_sh_init; /* This bitmap shows which of the State
104 Handles of the RNG4 block are initialized
105 by this driver */
106
107 struct clk_bulk_data *clks;
108 int num_clks;
109 /*
110 * debugfs entries for developer view into driver/device
111 * variables at runtime.
112 */
113#ifdef CONFIG_DEBUG_FS
114 struct dentry *ctl; /* controller dir */
115 struct debugfs_blob_wrapper ctl_kek_wrap, ctl_tkek_wrap, ctl_tdsk_wrap;
116#endif
117};
118
119#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API
120
121int caam_algapi_init(struct device *dev);
122void caam_algapi_exit(void);
123
124#else
125
126static inline int caam_algapi_init(struct device *dev)
127{
128 return 0;
129}
130
131static inline void caam_algapi_exit(void)
132{
133}
134
135#endif /* CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API */
136
137#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API
138
139int caam_algapi_hash_init(struct device *dev);
140void caam_algapi_hash_exit(void);
141
142#else
143
144static inline int caam_algapi_hash_init(struct device *dev)
145{
146 return 0;
147}
148
149static inline void caam_algapi_hash_exit(void)
150{
151}
152
153#endif /* CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API */
154
155#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_PKC_API
156
157int caam_pkc_init(struct device *dev);
158void caam_pkc_exit(void);
159
160#else
161
162static inline int caam_pkc_init(struct device *dev)
163{
164 return 0;
165}
166
167static inline void caam_pkc_exit(void)
168{
169}
170
171#endif /* CONFIG_CRYPTO_DEV_FSL_CAAM_PKC_API */
172
173#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_RNG_API
174
175int caam_rng_init(struct device *dev);
176void caam_rng_exit(struct device *dev);
177
178#else
179
180static inline int caam_rng_init(struct device *dev)
181{
182 return 0;
183}
184
185static inline void caam_rng_exit(struct device *dev) {}
186
187#endif /* CONFIG_CRYPTO_DEV_FSL_CAAM_RNG_API */
188
189#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_PRNG_API
190
191int caam_prng_register(struct device *dev);
192void caam_prng_unregister(void *data);
193
194#else
195
196static inline int caam_prng_register(struct device *dev)
197{
198 return 0;
199}
200
201static inline void caam_prng_unregister(void *data) {}
202#endif /* CONFIG_CRYPTO_DEV_FSL_CAAM_PRNG_API */
203
204#ifdef CONFIG_CAAM_QI
205
206int caam_qi_algapi_init(struct device *dev);
207void caam_qi_algapi_exit(void);
208
209#else
210
211static inline int caam_qi_algapi_init(struct device *dev)
212{
213 return 0;
214}
215
216static inline void caam_qi_algapi_exit(void)
217{
218}
219
220#endif /* CONFIG_CAAM_QI */
221
222static inline u64 caam_get_dma_mask(struct device *dev)
223{
224 struct device_node *nprop = dev->of_node;
225
226 if (caam_ptr_sz != sizeof(u64))
227 return DMA_BIT_MASK(32);
228
229 if (caam_dpaa2)
230 return DMA_BIT_MASK(49);
231
232 if (of_device_is_compatible(nprop, "fsl,sec-v5.0-job-ring") ||
233 of_device_is_compatible(nprop, "fsl,sec-v5.0"))
234 return DMA_BIT_MASK(40);
235
236 return DMA_BIT_MASK(36);
237}
238
239
240#endif /* INTERN_H */