2 * Copyright 2008-2014 Freescale Semiconductor, Inc.
4 * SPDX-License-Identifier: GPL-2.0+
6 * Based on CAAM driver in drivers/crypto/caam in Linux
15 #define CIRC_CNT(head, tail, size) (((head) - (tail)) & (size - 1))
16 #define CIRC_SPACE(head, tail, size) CIRC_CNT((tail), (head) + 1, (size))
20 static inline void start_jr0(void)
22 ccsr_sec_t *sec = (void *)CONFIG_SYS_FSL_SEC_ADDR;
23 u32 ctpr_ms = sec_in32(&sec->ctpr_ms);
24 u32 scfgr = sec_in32(&sec->scfgr);
26 if (ctpr_ms & SEC_CTPR_MS_VIRT_EN_INCL) {
27 /* VIRT_EN_INCL = 1 & VIRT_EN_POR = 1 or
28 * VIRT_EN_INCL = 1 & VIRT_EN_POR = 0 & SEC_SCFGR_VIRT_EN = 1
30 if ((ctpr_ms & SEC_CTPR_MS_VIRT_EN_POR) ||
31 (!(ctpr_ms & SEC_CTPR_MS_VIRT_EN_POR) &&
32 (scfgr & SEC_SCFGR_VIRT_EN)))
33 sec_out32(&sec->jrstartr, CONFIG_JRSTARTR_JR0);
35 /* VIRT_EN_INCL = 0 && VIRT_EN_POR_VALUE = 1 */
36 if (ctpr_ms & SEC_CTPR_MS_VIRT_EN_POR)
37 sec_out32(&sec->jrstartr, CONFIG_JRSTARTR_JR0);
41 static inline void jr_reset_liodn(void)
43 ccsr_sec_t *sec = (void *)CONFIG_SYS_FSL_SEC_ADDR;
44 sec_out32(&sec->jrliodnr[0].ls, 0);
47 static inline void jr_disable_irq(void)
49 struct jr_regs *regs = (struct jr_regs *)CONFIG_SYS_FSL_JR0_ADDR;
50 uint32_t jrcfg = sec_in32(®s->jrcfg1);
52 jrcfg = jrcfg | JR_INTMASK;
54 sec_out32(®s->jrcfg1, jrcfg);
57 static void jr_initregs(void)
59 struct jr_regs *regs = (struct jr_regs *)CONFIG_SYS_FSL_JR0_ADDR;
60 phys_addr_t ip_base = virt_to_phys((void *)jr.input_ring);
61 phys_addr_t op_base = virt_to_phys((void *)jr.output_ring);
63 #ifdef CONFIG_PHYS_64BIT
64 sec_out32(®s->irba_h, ip_base >> 32);
66 sec_out32(®s->irba_h, 0x0);
68 sec_out32(®s->irba_l, (uint32_t)ip_base);
69 #ifdef CONFIG_PHYS_64BIT
70 sec_out32(®s->orba_h, op_base >> 32);
72 sec_out32(®s->orba_h, 0x0);
74 sec_out32(®s->orba_l, (uint32_t)op_base);
75 sec_out32(®s->ors, JR_SIZE);
76 sec_out32(®s->irs, JR_SIZE);
82 static int jr_init(void)
84 memset(&jr, 0, sizeof(struct jobring));
86 jr.jq_id = DEFAULT_JR_ID;
89 #ifdef CONFIG_FSL_CORENET
90 jr.liodn = DEFAULT_JR_LIODN;
93 jr.input_ring = (dma_addr_t *)memalign(ARCH_DMA_MINALIGN,
94 JR_SIZE * sizeof(dma_addr_t));
98 (struct op_ring *)memalign(ARCH_DMA_MINALIGN,
99 JR_SIZE * sizeof(struct op_ring));
103 memset(jr.input_ring, 0, JR_SIZE * sizeof(dma_addr_t));
104 memset(jr.output_ring, 0, JR_SIZE * sizeof(struct op_ring));
113 static int jr_sw_cleanup(void)
119 memset(jr.info, 0, sizeof(jr.info));
120 memset(jr.input_ring, 0, jr.size * sizeof(dma_addr_t));
121 memset(jr.output_ring, 0, jr.size * sizeof(struct op_ring));
126 static int jr_hw_reset(void)
128 struct jr_regs *regs = (struct jr_regs *)CONFIG_SYS_FSL_JR0_ADDR;
129 uint32_t timeout = 100000;
130 uint32_t jrint, jrcr;
132 sec_out32(®s->jrcr, JRCR_RESET);
134 jrint = sec_in32(®s->jrint);
135 } while (((jrint & JRINT_ERR_HALT_MASK) ==
136 JRINT_ERR_HALT_INPROGRESS) && --timeout);
138 jrint = sec_in32(®s->jrint);
139 if (((jrint & JRINT_ERR_HALT_MASK) !=
140 JRINT_ERR_HALT_INPROGRESS) && timeout == 0)
144 sec_out32(®s->jrcr, JRCR_RESET);
146 jrcr = sec_in32(®s->jrcr);
147 } while ((jrcr & JRCR_RESET) && --timeout);
155 /* -1 --- error, can't enqueue -- no space available */
156 static int jr_enqueue(uint32_t *desc_addr,
157 void (*callback)(uint32_t desc, uint32_t status, void *arg),
160 struct jr_regs *regs = (struct jr_regs *)CONFIG_SYS_FSL_JR0_ADDR;
162 dma_addr_t desc_phys_addr = virt_to_phys(desc_addr);
164 if (sec_in32(®s->irsa) == 0 ||
165 CIRC_SPACE(jr.head, jr.tail, jr.size) <= 0)
168 jr.info[head].desc_phys_addr = desc_phys_addr;
169 jr.info[head].desc_addr = (uint32_t)desc_addr;
170 jr.info[head].callback = (void *)callback;
171 jr.info[head].arg = arg;
172 jr.info[head].op_done = 0;
174 unsigned long start = (unsigned long)&jr.info[head] &
175 ~(ARCH_DMA_MINALIGN - 1);
176 unsigned long end = ALIGN(start + sizeof(struct jr_info),
178 flush_dcache_range(start, end);
180 jr.input_ring[head] = desc_phys_addr;
181 start = (unsigned long)&jr.input_ring[head] & ~(ARCH_DMA_MINALIGN - 1);
182 end = ALIGN(start + sizeof(dma_addr_t), ARCH_DMA_MINALIGN);
183 flush_dcache_range(start, end);
185 jr.head = (head + 1) & (jr.size - 1);
187 sec_out32(®s->irja, 1);
192 static int jr_dequeue(void)
194 struct jr_regs *regs = (struct jr_regs *)CONFIG_SYS_FSL_JR0_ADDR;
198 void (*callback)(uint32_t desc, uint32_t status, void *arg);
201 while (sec_in32(®s->orsf) && CIRC_CNT(jr.head, jr.tail, jr.size)) {
202 unsigned long start = (unsigned long)jr.output_ring &
203 ~(ARCH_DMA_MINALIGN - 1);
204 unsigned long end = ALIGN(start +
205 sizeof(struct op_ring)*JR_SIZE,
207 invalidate_dcache_range(start, end);
211 dma_addr_t op_desc = jr.output_ring[jr.tail].desc;
212 uint32_t status = jr.output_ring[jr.tail].status;
215 for (i = 0; CIRC_CNT(head, tail + i, jr.size) >= 1; i++) {
216 idx = (tail + i) & (jr.size - 1);
217 if (op_desc == jr.info[idx].desc_phys_addr) {
218 desc_virt = jr.info[idx].desc_addr;
224 /* Error condition if match not found */
228 jr.info[idx].op_done = 1;
229 callback = (void *)jr.info[idx].callback;
230 arg = jr.info[idx].arg;
232 /* When the job on tail idx gets done, increment
233 * tail till the point where job completed out of oredr has
234 * been taken into account
238 tail = (tail + 1) & (jr.size - 1);
239 } while (jr.info[tail].op_done);
242 jr.read_idx = (jr.read_idx + 1) & (jr.size - 1);
244 sec_out32(®s->orjr, 1);
245 jr.info[idx].op_done = 0;
247 callback(desc_virt, status, arg);
253 static void desc_done(uint32_t desc, uint32_t status, void *arg)
255 struct result *x = arg;
257 caam_jr_strstatus(status);
261 int run_descriptor_jr(uint32_t *desc)
263 unsigned long long timeval = get_ticks();
264 unsigned long long timeout = usec2ticks(CONFIG_SEC_DEQ_TIMEOUT);
268 memset(&op, 0, sizeof(op));
270 ret = jr_enqueue(desc, desc_done, &op);
272 debug("Error in SEC enq\n");
277 timeval = get_ticks();
278 timeout = usec2ticks(CONFIG_SEC_DEQ_TIMEOUT);
279 while (op.done != 1) {
282 debug("Error in SEC deq\n");
287 if ((get_ticks() - timeval) > timeout) {
288 debug("SEC Dequeue timed out\n");
295 debug("Error %x\n", op.status);
304 if (jr_hw_reset() < 0)
307 /* Clean up the jobring structure maintained by software */
315 ccsr_sec_t *sec = (void *)CONFIG_SYS_FSL_SEC_ADDR;
316 uint32_t mcfgr = sec_in32(&sec->mcfgr);
317 uint32_t timeout = 100000;
319 mcfgr |= MCFGR_SWRST;
320 sec_out32(&sec->mcfgr, mcfgr);
322 mcfgr |= MCFGR_DMA_RST;
323 sec_out32(&sec->mcfgr, mcfgr);
325 mcfgr = sec_in32(&sec->mcfgr);
326 } while ((mcfgr & MCFGR_DMA_RST) == MCFGR_DMA_RST && --timeout);
333 mcfgr = sec_in32(&sec->mcfgr);
334 } while ((mcfgr & MCFGR_SWRST) == MCFGR_SWRST && --timeout);
342 static int instantiate_rng(void)
348 ccsr_sec_t __iomem *sec =
349 (ccsr_sec_t __iomem *)CONFIG_SYS_FSL_SEC_ADDR;
350 struct rng4tst __iomem *rng =
351 (struct rng4tst __iomem *)&sec->rng;
353 memset(&op, 0, sizeof(struct result));
355 desc = memalign(ARCH_DMA_MINALIGN, sizeof(uint32_t) * 6);
357 printf("cannot allocate RNG init descriptor memory\n");
361 inline_cnstr_jobdesc_rng_instantiation(desc);
362 int size = roundup(sizeof(uint32_t) * 6, ARCH_DMA_MINALIGN);
363 flush_dcache_range((unsigned long)desc,
364 (unsigned long)desc + size);
366 ret = run_descriptor_jr(desc);
369 printf("RNG: Instantiation failed with error %x\n", ret);
371 rdsta_val = sec_in32(&rng->rdsta);
372 if (op.status || !(rdsta_val & RNG_STATE0_HANDLE_INSTANTIATED))
378 static u8 get_rng_vid(void)
380 ccsr_sec_t *sec = (void *)CONFIG_SYS_FSL_SEC_ADDR;
381 u32 cha_vid = sec_in32(&sec->chavid_ls);
383 return (cha_vid & SEC_CHAVID_RNG_LS_MASK) >> SEC_CHAVID_LS_RNG_SHIFT;
387 * By default, the TRNG runs for 200 clocks per sample;
388 * 1200 clocks per sample generates better entropy.
390 static void kick_trng(int ent_delay)
392 ccsr_sec_t __iomem *sec =
393 (ccsr_sec_t __iomem *)CONFIG_SYS_FSL_SEC_ADDR;
394 struct rng4tst __iomem *rng =
395 (struct rng4tst __iomem *)&sec->rng;
398 /* put RNG4 into program mode */
399 sec_setbits32(&rng->rtmctl, RTMCTL_PRGM);
400 /* rtsdctl bits 0-15 contain "Entropy Delay, which defines the
401 * length (in system clocks) of each Entropy sample taken
403 val = sec_in32(&rng->rtsdctl);
404 val = (val & ~RTSDCTL_ENT_DLY_MASK) |
405 (ent_delay << RTSDCTL_ENT_DLY_SHIFT);
406 sec_out32(&rng->rtsdctl, val);
407 /* min. freq. count, equal to 1/4 of the entropy sample length */
408 sec_out32(&rng->rtfreqmin, ent_delay >> 2);
409 /* disable maximum frequency count */
410 sec_out32(&rng->rtfreqmax, RTFRQMAX_DISABLE);
411 /* read the control register */
412 val = sec_in32(&rng->rtmctl);
414 * select raw sampling in both entropy shifter
415 * and statistical checker
417 sec_setbits32(&val, RTMCTL_SAMP_MODE_RAW_ES_SC);
418 /* put RNG4 into run mode */
419 sec_clrbits32(&val, RTMCTL_PRGM);
420 /* write back the control register */
421 sec_out32(&rng->rtmctl, val);
424 static int rng_init(void)
426 int ret, ent_delay = RTSDCTL_ENT_DLY_MIN;
427 ccsr_sec_t __iomem *sec =
428 (ccsr_sec_t __iomem *)CONFIG_SYS_FSL_SEC_ADDR;
429 struct rng4tst __iomem *rng =
430 (struct rng4tst __iomem *)&sec->rng;
432 u32 rdsta = sec_in32(&rng->rdsta);
434 /* Check if RNG state 0 handler is already instantiated */
435 if (rdsta & RNG_STATE0_HANDLE_INSTANTIATED)
440 * If either of the SH's were instantiated by somebody else
441 * then it is assumed that the entropy
442 * parameters are properly set and thus the function
443 * setting these (kick_trng(...)) is skipped.
444 * Also, if a handle was instantiated, do not change
445 * the TRNG parameters.
447 kick_trng(ent_delay);
450 * if instantiate_rng(...) fails, the loop will rerun
451 * and the kick_trng(...) function will modfiy the
452 * upper and lower limits of the entropy sampling
453 * interval, leading to a sucessful initialization of
456 ret = instantiate_rng();
457 } while ((ret == -1) && (ent_delay < RTSDCTL_ENT_DLY_MAX));
459 printf("RNG: Failed to instantiate RNG\n");
463 /* Enable RDB bit so that RNG works faster */
464 sec_setbits32(&sec->scfgr, SEC_SCFGR_RDBENABLE);
473 #ifdef CONFIG_PHYS_64BIT
474 ccsr_sec_t *sec = (void *)CONFIG_SYS_FSL_SEC_ADDR;
475 uint32_t mcr = sec_in32(&sec->mcfgr);
477 sec_out32(&sec->mcfgr, mcr | 1 << MCFGR_PS_SHIFT);
481 printf("SEC initialization failed\n");
485 if (get_rng_vid() >= 4) {
486 if (rng_init() < 0) {
487 printf("RNG instantiation failed\n");
490 printf("SEC: RNG instantiated\n");