drivers/crypto/fsl/jobdesc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * SEC Descriptor Construction Library
   4  * Basic job descriptor construction
   5  *
   6  * Copyright 2014 Freescale Semiconductor, Inc.
   7  *
   8  */
   9
  10 #include <common.h>
  11 #include <fsl_sec.h>
  12 #include "desc_constr.h"
  13 #include "jobdesc.h"
  14 #include "rsa_caam.h"
  15
  16 #if defined(CONFIG_MX6) || defined(CONFIG_MX7)
  17 /*!
  18  * Secure memory run command
  19  *
  20  * @param   sec_mem_cmd  Secure memory command register
  21  * @return  cmd_status  Secure memory command status register
  22  */
  23 uint32_t secmem_set_cmd(uint32_t sec_mem_cmd)
  24 {
  25         uint32_t temp_reg;
  26
  27         ccsr_sec_t *sec = (void *)CONFIG_SYS_FSL_SEC_ADDR;
  28         uint32_t sm_vid = SM_VERSION(sec_in32(&sec->smvid));
  29         uint32_t jr_id = 0;
  30
  31         sec_out32(CAAM_SMCJR(sm_vid, jr_id), sec_mem_cmd);
  32
  33         do {
  34                 temp_reg = sec_in32(CAAM_SMCSJR(sm_vid, jr_id));
  35         } while (temp_reg & CMD_COMPLETE);
  36
  37         return temp_reg;
  38 }
  39
  40 /*!
  41  * CAAM page allocation:
  42  * Allocates a partition from secure memory, with the id
  43  * equal to partition_num. This will de-allocate the page
  44  * if it is already allocated. The partition will have
  45  * full access permissions. The permissions are set before,
  46  * running a job descriptor. A memory page of secure RAM
  47  * is allocated for the partition.
  48  *
  49  * @param   page  Number of the page to allocate.
  50  * @param   partition  Number of the partition to allocate.
  51  * @return  0 on success, ERROR_IN_PAGE_ALLOC otherwise
  52  */
  53 int caam_page_alloc(uint8_t page_num, uint8_t partition_num)
  54 {
  55         uint32_t temp_reg;
  56
  57         ccsr_sec_t *sec = (void *)CONFIG_SYS_FSL_SEC_ADDR;
  58         uint32_t sm_vid = SM_VERSION(sec_in32(&sec->smvid));
  59         uint32_t jr_id = 0;
  60
  61         /*
  62          * De-Allocate partition_num if already allocated to ARM core
  63          */
  64         if (sec_in32(CAAM_SMPO_0) & PARTITION_OWNER(partition_num)) {
  65                 temp_reg = secmem_set_cmd(PARTITION(partition_num) |
  66                                                 CMD_PART_DEALLOC);
  67                 if (temp_reg & SMCSJR_AERR) {
  68                         printf("Error: De-allocation status 0x%X\n", temp_reg);
  69                         return ERROR_IN_PAGE_ALLOC;
  70                 }
  71         }
  72
  73         /* set the access rights to allow full access */
  74         sec_out32(CAAM_SMAG1JR(sm_vid, jr_id, partition_num), 0xF);
  75         sec_out32(CAAM_SMAG2JR(sm_vid, jr_id, partition_num), 0xF);
  76         sec_out32(CAAM_SMAPJR(sm_vid, jr_id, partition_num), 0xFF);
  77
  78         /* Now need to allocate partition_num of secure RAM. */
  79         /* De-Allocate page_num by starting with a page inquiry command */
  80         temp_reg = secmem_set_cmd(PAGE(page_num) | CMD_INQUIRY);
  81
  82         /* if the page is owned, de-allocate it */
  83         if ((temp_reg & SMCSJR_PO) == PAGE_OWNED) {
  84                 temp_reg = secmem_set_cmd(PAGE(page_num) | CMD_PAGE_DEALLOC);
  85                 if (temp_reg & SMCSJR_AERR) {
  86                         printf("Error: Allocation status 0x%X\n", temp_reg);
  87                         return ERROR_IN_PAGE_ALLOC;
  88                 }
  89         }
  90
  91         /* Allocate page_num to partition_num */
  92         temp_reg = secmem_set_cmd(PAGE(page_num) | PARTITION(partition_num)
  93                                                 | CMD_PAGE_ALLOC);
  94         if (temp_reg & SMCSJR_AERR) {
  95                 printf("Error: Allocation status 0x%X\n", temp_reg);
  96                 return ERROR_IN_PAGE_ALLOC;
  97         }
  98         /* page inquiry command to ensure that the page was allocated */
  99         temp_reg = secmem_set_cmd(PAGE(page_num) | CMD_INQUIRY);
 100
 101         /* if the page is not owned => problem */
 102         if ((temp_reg & SMCSJR_PO) != PAGE_OWNED) {
 103                 printf("Allocation of page %d in partition %d failed 0x%X\n",
 104                        temp_reg, page_num, partition_num);
 105
 106                 return ERROR_IN_PAGE_ALLOC;
 107         }
 108
 109         return 0;
 110 }
 111
 112 int inline_cnstr_jobdesc_blob_dek(uint32_t *desc, const uint8_t *plain_txt,
 113                                        uint8_t *dek_blob, uint32_t in_sz)
 114 {
 115         ccsr_sec_t *sec = (void *)CONFIG_SYS_FSL_SEC_ADDR;
 116         uint32_t sm_vid = SM_VERSION(sec_in32(&sec->smvid));
 117         uint32_t jr_id = 0;
 118
 119         uint32_t ret = 0;
 120         u32 aad_w1, aad_w2;
 121         /* output blob will have 32 bytes key blob in beginning and
 122          * 16 byte HMAC identifier at end of data blob */
 123         uint32_t out_sz = in_sz + KEY_BLOB_SIZE + MAC_SIZE;
 124         /* Setting HDR for blob */
 125         uint8_t wrapped_key_hdr[8] = {HDR_TAG, 0x00, WRP_HDR_SIZE + out_sz,
 126                              HDR_PAR, HAB_MOD, HAB_ALG, in_sz, HAB_FLG};
 127
 128         /* initialize the blob array */
 129         memset(dek_blob, 0, out_sz + 8);
 130         /* Copy the header into the DEK blob buffer */
 131         memcpy(dek_blob, wrapped_key_hdr, sizeof(wrapped_key_hdr));
 132
 133         /* allocating secure memory */
 134         ret = caam_page_alloc(PAGE_1, PARTITION_1);
 135         if (ret)
 136                 return ret;
 137
 138         /* Write DEK to secure memory */
 139         memcpy((uint32_t *)SEC_MEM_PAGE1, (uint32_t *)plain_txt, in_sz);
 140
 141         unsigned long start = (unsigned long)SEC_MEM_PAGE1 &
 142                                 ~(ARCH_DMA_MINALIGN - 1);
 143         unsigned long end = ALIGN(start + 0x1000, ARCH_DMA_MINALIGN);
 144         flush_dcache_range(start, end);
 145
 146         /* Now configure the access rights of the partition */
 147         sec_out32(CAAM_SMAG1JR(sm_vid, jr_id, PARTITION_1), KS_G1);
 148         sec_out32(CAAM_SMAG2JR(sm_vid, jr_id, PARTITION_1), 0);
 149         sec_out32(CAAM_SMAPJR(sm_vid, jr_id, PARTITION_1), PERM);
 150
 151         /* construct aad for AES */
 152         aad_w1 = (in_sz << OP_ALG_ALGSEL_SHIFT) | KEY_AES_SRC | LD_CCM_MODE;
 153         aad_w2 = 0x0;
 154
 155         init_job_desc(desc, 0);
 156
 157         append_cmd(desc, CMD_LOAD | CLASS_2 | KEY_IMM | KEY_ENC |
 158                                 (0x0c << LDST_OFFSET_SHIFT) | 0x08);
 159
 160         append_u32(desc, aad_w1);
 161
 162         append_u32(desc, aad_w2);
 163
 164         append_cmd_ptr(desc, (dma_addr_t)SEC_MEM_PAGE1, in_sz, CMD_SEQ_IN_PTR);
 165
 166         append_cmd_ptr(desc, (dma_addr_t)dek_blob + 8, out_sz, CMD_SEQ_OUT_PTR);
 167
 168         append_operation(desc, OP_TYPE_ENCAP_PROTOCOL | OP_PCLID_BLOB |
 169                                                 OP_PCLID_SECMEM);
 170
 171         return ret;
 172 }
 173 #endif
 174
 175 void inline_cnstr_jobdesc_hash(uint32_t *desc,
 176                           const uint8_t *msg, uint32_t msgsz, uint8_t *digest,
 177                           u32 alg_type, uint32_t alg_size, int sg_tbl)
 178 {
 179         /* SHA 256 , output is of length 32 words */
 180         uint32_t storelen = alg_size;
 181         u32 options;
 182         dma_addr_t dma_addr_in, dma_addr_out;
 183
 184         dma_addr_in = virt_to_phys((void *)msg);
 185         dma_addr_out = virt_to_phys((void *)digest);
 186
 187         init_job_desc(desc, 0);
 188         append_operation(desc, OP_TYPE_CLASS2_ALG |
 189                          OP_ALG_AAI_HASH | OP_ALG_AS_INITFINAL |
 190                          OP_ALG_ENCRYPT | OP_ALG_ICV_OFF | alg_type);
 191
 192         options = LDST_CLASS_2_CCB | FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST2;
 193         if (sg_tbl)
 194                 options |= FIFOLDST_SGF;
 195         if (msgsz > 0xffff) {
 196                 options |= FIFOLDST_EXT;
 197                 append_fifo_load(desc, dma_addr_in, 0, options);
 198                 append_cmd(desc, msgsz);
 199         } else {
 200                 append_fifo_load(desc, dma_addr_in, msgsz, options);
 201         }
 202
 203         append_store(desc, dma_addr_out, storelen,
 204                      LDST_CLASS_2_CCB | LDST_SRCDST_BYTE_CONTEXT);
 205 }
 206 #ifndef CONFIG_SPL_BUILD
 207 void inline_cnstr_jobdesc_blob_encap(uint32_t *desc, uint8_t *key_idnfr,
 208                                      uint8_t *plain_txt, uint8_t *enc_blob,
 209                                      uint32_t in_sz)
 210 {
 211         dma_addr_t dma_addr_key_idnfr, dma_addr_in, dma_addr_out;
 212         uint32_t key_sz = KEY_IDNFR_SZ_BYTES;
 213         /* output blob will have 32 bytes key blob in beginning and
 214          * 16 byte HMAC identifier at end of data blob */
 215         uint32_t out_sz = in_sz + KEY_BLOB_SIZE + MAC_SIZE;
 216
 217         dma_addr_key_idnfr = virt_to_phys((void *)key_idnfr);
 218         dma_addr_in     = virt_to_phys((void *)plain_txt);
 219         dma_addr_out    = virt_to_phys((void *)enc_blob);
 220
 221         init_job_desc(desc, 0);
 222
 223         append_key(desc, dma_addr_key_idnfr, key_sz, CLASS_2);
 224
 225         append_seq_in_ptr(desc, dma_addr_in, in_sz, 0);
 226
 227         append_seq_out_ptr(desc, dma_addr_out, out_sz, 0);
 228
 229         append_operation(desc, OP_TYPE_ENCAP_PROTOCOL | OP_PCLID_BLOB);
 230 }
 231
 232 void inline_cnstr_jobdesc_blob_decap(uint32_t *desc, uint8_t *key_idnfr,
 233                                      uint8_t *enc_blob, uint8_t *plain_txt,
 234                                      uint32_t out_sz)
 235 {
 236         dma_addr_t dma_addr_key_idnfr, dma_addr_in, dma_addr_out;
 237         uint32_t key_sz = KEY_IDNFR_SZ_BYTES;
 238         uint32_t in_sz = out_sz + KEY_BLOB_SIZE + MAC_SIZE;
 239
 240         dma_addr_key_idnfr = virt_to_phys((void *)key_idnfr);
 241         dma_addr_in     = virt_to_phys((void *)enc_blob);
 242         dma_addr_out    = virt_to_phys((void *)plain_txt);
 243
 244         init_job_desc(desc, 0);
 245
 246         append_key(desc, dma_addr_key_idnfr, key_sz, CLASS_2);
 247
 248         append_seq_in_ptr(desc, dma_addr_in, in_sz, 0);
 249
 250         append_seq_out_ptr(desc, dma_addr_out, out_sz, 0);
 251
 252         append_operation(desc, OP_TYPE_DECAP_PROTOCOL | OP_PCLID_BLOB);
 253 }
 254 #endif
 255 /*
 256  * Descriptor to instantiate RNG State Handle 0 in normal mode and
 257  * load the JDKEK, TDKEK and TDSK registers
 258  */
 259 void inline_cnstr_jobdesc_rng_instantiation(uint32_t *desc, int handle)
 260 {
 261         u32 *jump_cmd;
 262
 263         init_job_desc(desc, 0);
 264
 265         /* INIT RNG in non-test mode */
 266         append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
 267                         (handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INIT);
 268
 269         /* For SH0, Secure Keys must be generated as well */
 270         if (handle == 0) {
 271                 /* wait for done */
 272                 jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1);
 273                 set_jump_tgt_here(desc, jump_cmd);
 274
 275                 /*
 276                  * load 1 to clear written reg:
 277                  * resets the done interrupt and returns the RNG to idle.
 278                  */
 279                 append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW);
 280
 281                 /* generate secure keys (non-test) */
 282                 append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
 283                                 OP_ALG_RNG4_SK);
 284         }
 285 }
 286
 287 /* Change key size to bytes form bits in calling function*/
 288 void inline_cnstr_jobdesc_pkha_rsaexp(uint32_t *desc,
 289                                       struct pk_in_params *pkin, uint8_t *out,
 290                                       uint32_t out_siz)
 291 {
 292         dma_addr_t dma_addr_e, dma_addr_a, dma_addr_n, dma_addr_out;
 293
 294         dma_addr_e = virt_to_phys((void *)pkin->e);
 295         dma_addr_a = virt_to_phys((void *)pkin->a);
 296         dma_addr_n = virt_to_phys((void *)pkin->n);
 297         dma_addr_out = virt_to_phys((void *)out);
 298
 299         init_job_desc(desc, 0);
 300         append_key(desc, dma_addr_e, pkin->e_siz, KEY_DEST_PKHA_E | CLASS_1);
 301
 302         append_fifo_load(desc, dma_addr_a,
 303                          pkin->a_siz, LDST_CLASS_1_CCB | FIFOLD_TYPE_PK_A);
 304
 305         append_fifo_load(desc, dma_addr_n,
 306                          pkin->n_siz, LDST_CLASS_1_CCB | FIFOLD_TYPE_PK_N);
 307
 308         append_operation(desc, OP_TYPE_PK | OP_ALG_PK | OP_ALG_PKMODE_MOD_EXPO);
 309
 310         append_fifo_store(desc, dma_addr_out, out_siz,
 311                           LDST_CLASS_1_CCB | FIFOST_TYPE_PKHA_B);
 312 }