drivers/crypto/fsl/jobdesc.c

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