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path: root/drivers/crypto/caam/caamalg.c
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Diffstat (limited to 'drivers/crypto/caam/caamalg.c')
-rw-r--r--drivers/crypto/caam/caamalg.c1268
1 files changed, 1268 insertions, 0 deletions
diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
new file mode 100644
index 000000000000..d0e65d6ddc77
--- /dev/null
+++ b/drivers/crypto/caam/caamalg.c
@@ -0,0 +1,1268 @@
+/*
+ * caam - Freescale FSL CAAM support for crypto API
+ *
+ * Copyright 2008-2011 Freescale Semiconductor, Inc.
+ *
+ * Based on talitos crypto API driver.
+ *
+ * relationship of job descriptors to shared descriptors (SteveC Dec 10 2008):
+ *
+ * --------------- ---------------
+ * | JobDesc #1 |-------------------->| ShareDesc |
+ * | *(packet 1) | | (PDB) |
+ * --------------- |------------->| (hashKey) |
+ * . | | (cipherKey) |
+ * . | |-------->| (operation) |
+ * --------------- | | ---------------
+ * | JobDesc #2 |------| |
+ * | *(packet 2) | |
+ * --------------- |
+ * . |
+ * . |
+ * --------------- |
+ * | JobDesc #3 |------------
+ * | *(packet 3) |
+ * ---------------
+ *
+ * The SharedDesc never changes for a connection unless rekeyed, but
+ * each packet will likely be in a different place. So all we need
+ * to know to process the packet is where the input is, where the
+ * output goes, and what context we want to process with. Context is
+ * in the SharedDesc, packet references in the JobDesc.
+ *
+ * So, a job desc looks like:
+ *
+ * ---------------------
+ * | Header |
+ * | ShareDesc Pointer |
+ * | SEQ_OUT_PTR |
+ * | (output buffer) |
+ * | SEQ_IN_PTR |
+ * | (input buffer) |
+ * | LOAD (to DECO) |
+ * ---------------------
+ */
+
+#include "compat.h"
+
+#include "regs.h"
+#include "intern.h"
+#include "desc_constr.h"
+#include "jr.h"
+#include "error.h"
+
+/*
+ * crypto alg
+ */
+#define CAAM_CRA_PRIORITY 3000
+/* max key is sum of AES_MAX_KEY_SIZE, max split key size */
+#define CAAM_MAX_KEY_SIZE (AES_MAX_KEY_SIZE + \
+ SHA512_DIGEST_SIZE * 2)
+/* max IV is max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */
+#define CAAM_MAX_IV_LENGTH 16
+
+/* length of descriptors text */
+#define DESC_AEAD_SHARED_TEXT_LEN 4
+#define DESC_AEAD_ENCRYPT_TEXT_LEN 21
+#define DESC_AEAD_DECRYPT_TEXT_LEN 24
+#define DESC_AEAD_GIVENCRYPT_TEXT_LEN 27
+
+#ifdef DEBUG
+/* for print_hex_dumps with line references */
+#define xstr(s) str(s)
+#define str(s) #s
+#define debug(format, arg...) printk(format, arg)
+#else
+#define debug(format, arg...)
+#endif
+
+/*
+ * per-session context
+ */
+struct caam_ctx {
+ struct device *jrdev;
+ u32 *sh_desc;
+ dma_addr_t shared_desc_phys;
+ u32 class1_alg_type;
+ u32 class2_alg_type;
+ u32 alg_op;
+ u8 *key;
+ dma_addr_t key_phys;
+ unsigned int enckeylen;
+ unsigned int split_key_len;
+ unsigned int split_key_pad_len;
+ unsigned int authsize;
+};
+
+static int aead_authenc_setauthsize(struct crypto_aead *authenc,
+ unsigned int authsize)
+{
+ struct caam_ctx *ctx = crypto_aead_ctx(authenc);
+
+ ctx->authsize = authsize;
+
+ return 0;
+}
+
+struct split_key_result {
+ struct completion completion;
+ int err;
+};
+
+static void split_key_done(struct device *dev, u32 *desc, u32 err,
+ void *context)
+{
+ struct split_key_result *res = context;
+
+#ifdef DEBUG
+ dev_err(dev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
+#endif
+ if (err) {
+ char tmp[CAAM_ERROR_STR_MAX];
+
+ dev_err(dev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
+ }
+
+ res->err = err;
+
+ complete(&res->completion);
+}
+
+/*
+get a split ipad/opad key
+
+Split key generation-----------------------------------------------
+
+[00] 0xb0810008 jobdesc: stidx=1 share=never len=8
+[01] 0x04000014 key: class2->keyreg len=20
+ @0xffe01000
+[03] 0x84410014 operation: cls2-op sha1 hmac init dec
+[04] 0x24940000 fifold: class2 msgdata-last2 len=0 imm
+[05] 0xa4000001 jump: class2 local all ->1 [06]
+[06] 0x64260028 fifostr: class2 mdsplit-jdk len=40
+ @0xffe04000
+*/
+static u32 gen_split_key(struct caam_ctx *ctx, const u8 *key_in, u32 authkeylen)
+{
+ struct device *jrdev = ctx->jrdev;
+ u32 *desc;
+ struct split_key_result result;
+ dma_addr_t dma_addr_in, dma_addr_out;
+ int ret = 0;
+
+ desc = kmalloc(CAAM_CMD_SZ * 6 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA);
+
+ init_job_desc(desc, 0);
+
+ dma_addr_in = dma_map_single(jrdev, (void *)key_in, authkeylen,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(jrdev, dma_addr_in)) {
+ dev_err(jrdev, "unable to map key input memory\n");
+ kfree(desc);
+ return -ENOMEM;
+ }
+ append_key(desc, dma_addr_in, authkeylen, CLASS_2 |
+ KEY_DEST_CLASS_REG);
+
+ /* Sets MDHA up into an HMAC-INIT */
+ append_operation(desc, ctx->alg_op | OP_ALG_DECRYPT |
+ OP_ALG_AS_INIT);
+
+ /*
+ * do a FIFO_LOAD of zero, this will trigger the internal key expansion
+ into both pads inside MDHA
+ */
+ append_fifo_load_as_imm(desc, NULL, 0, LDST_CLASS_2_CCB |
+ FIFOLD_TYPE_MSG | FIFOLD_TYPE_LAST2);
+
+ /*
+ * FIFO_STORE with the explicit split-key content store
+ * (0x26 output type)
+ */
+ dma_addr_out = dma_map_single(jrdev, ctx->key, ctx->split_key_pad_len,
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(jrdev, dma_addr_out)) {
+ dev_err(jrdev, "unable to map key output memory\n");
+ kfree(desc);
+ return -ENOMEM;
+ }
+ append_fifo_store(desc, dma_addr_out, ctx->split_key_len,
+ LDST_CLASS_2_CCB | FIFOST_TYPE_SPLIT_KEK);
+
+#ifdef DEBUG
+ print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, key_in, authkeylen, 1);
+ print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
+#endif
+
+ result.err = 0;
+ init_completion(&result.completion);
+
+ ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result);
+ if (!ret) {
+ /* in progress */
+ wait_for_completion_interruptible(&result.completion);
+ ret = result.err;
+#ifdef DEBUG
+ print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, ctx->key,
+ ctx->split_key_pad_len, 1);
+#endif
+ }
+
+ dma_unmap_single(jrdev, dma_addr_out, ctx->split_key_pad_len,
+ DMA_FROM_DEVICE);
+ dma_unmap_single(jrdev, dma_addr_in, authkeylen, DMA_TO_DEVICE);
+
+ kfree(desc);
+
+ return ret;
+}
+
+static int build_sh_desc_ipsec(struct caam_ctx *ctx)
+{
+ struct device *jrdev = ctx->jrdev;
+ u32 *sh_desc;
+ u32 *jump_cmd;
+ bool keys_fit_inline = 0;
+
+ /*
+ * largest Job Descriptor and its Shared Descriptor
+ * must both fit into the 64-word Descriptor h/w Buffer
+ */
+ if ((DESC_AEAD_GIVENCRYPT_TEXT_LEN +
+ DESC_AEAD_SHARED_TEXT_LEN) * CAAM_CMD_SZ +
+ ctx->split_key_pad_len + ctx->enckeylen <= CAAM_DESC_BYTES_MAX)
+ keys_fit_inline = 1;
+
+ /* build shared descriptor for this session */
+ sh_desc = kmalloc(CAAM_CMD_SZ * DESC_AEAD_SHARED_TEXT_LEN +
+ keys_fit_inline ?
+ ctx->split_key_pad_len + ctx->enckeylen :
+ CAAM_PTR_SZ * 2, GFP_DMA | GFP_KERNEL);
+ if (!sh_desc) {
+ dev_err(jrdev, "could not allocate shared descriptor\n");
+ return -ENOMEM;
+ }
+
+ init_sh_desc(sh_desc, HDR_SAVECTX | HDR_SHARE_SERIAL);
+
+ jump_cmd = append_jump(sh_desc, CLASS_BOTH | JUMP_TEST_ALL |
+ JUMP_COND_SHRD | JUMP_COND_SELF);
+
+ /*
+ * process keys, starting with class 2/authentication.
+ */
+ if (keys_fit_inline) {
+ append_key_as_imm(sh_desc, ctx->key, ctx->split_key_pad_len,
+ ctx->split_key_len,
+ CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC);
+
+ append_key_as_imm(sh_desc, (void *)ctx->key +
+ ctx->split_key_pad_len, ctx->enckeylen,
+ ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
+ } else {
+ append_key(sh_desc, ctx->key_phys, ctx->split_key_len, CLASS_2 |
+ KEY_DEST_MDHA_SPLIT | KEY_ENC);
+ append_key(sh_desc, ctx->key_phys + ctx->split_key_pad_len,
+ ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
+ }
+
+ /* update jump cmd now that we are at the jump target */
+ set_jump_tgt_here(sh_desc, jump_cmd);
+
+ ctx->shared_desc_phys = dma_map_single(jrdev, sh_desc,
+ desc_bytes(sh_desc),
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(jrdev, ctx->shared_desc_phys)) {
+ dev_err(jrdev, "unable to map shared descriptor\n");
+ kfree(sh_desc);
+ return -ENOMEM;
+ }
+
+ ctx->sh_desc = sh_desc;
+
+ return 0;
+}
+
+static int aead_authenc_setkey(struct crypto_aead *aead,
+ const u8 *key, unsigned int keylen)
+{
+ /* Sizes for MDHA pads (*not* keys): MD5, SHA1, 224, 256, 384, 512 */
+ static const u8 mdpadlen[] = { 16, 20, 32, 32, 64, 64 };
+ struct caam_ctx *ctx = crypto_aead_ctx(aead);
+ struct device *jrdev = ctx->jrdev;
+ struct rtattr *rta = (void *)key;
+ struct crypto_authenc_key_param *param;
+ unsigned int authkeylen;
+ unsigned int enckeylen;
+ int ret = 0;
+
+ param = RTA_DATA(rta);
+ enckeylen = be32_to_cpu(param->enckeylen);
+
+ key += RTA_ALIGN(rta->rta_len);
+ keylen -= RTA_ALIGN(rta->rta_len);
+
+ if (keylen < enckeylen)
+ goto badkey;
+
+ authkeylen = keylen - enckeylen;
+
+ if (keylen > CAAM_MAX_KEY_SIZE)
+ goto badkey;
+
+ /* Pick class 2 key length from algorithm submask */
+ ctx->split_key_len = mdpadlen[(ctx->alg_op & OP_ALG_ALGSEL_SUBMASK) >>
+ OP_ALG_ALGSEL_SHIFT] * 2;
+ ctx->split_key_pad_len = ALIGN(ctx->split_key_len, 16);
+
+#ifdef DEBUG
+ printk(KERN_ERR "keylen %d enckeylen %d authkeylen %d\n",
+ keylen, enckeylen, authkeylen);
+ printk(KERN_ERR "split_key_len %d split_key_pad_len %d\n",
+ ctx->split_key_len, ctx->split_key_pad_len);
+ print_hex_dump(KERN_ERR, "key in @"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
+#endif
+ ctx->key = kmalloc(ctx->split_key_pad_len + enckeylen,
+ GFP_KERNEL | GFP_DMA);
+ if (!ctx->key) {
+ dev_err(jrdev, "could not allocate key output memory\n");
+ return -ENOMEM;
+ }
+
+ ret = gen_split_key(ctx, key, authkeylen);
+ if (ret) {
+ kfree(ctx->key);
+ goto badkey;
+ }
+
+ /* postpend encryption key to auth split key */
+ memcpy(ctx->key + ctx->split_key_pad_len, key + authkeylen, enckeylen);
+
+ ctx->key_phys = dma_map_single(jrdev, ctx->key, ctx->split_key_pad_len +
+ enckeylen, DMA_TO_DEVICE);
+ if (dma_mapping_error(jrdev, ctx->key_phys)) {
+ dev_err(jrdev, "unable to map key i/o memory\n");
+ kfree(ctx->key);
+ return -ENOMEM;
+ }
+#ifdef DEBUG
+ print_hex_dump(KERN_ERR, "ctx.key@"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, ctx->key,
+ ctx->split_key_pad_len + enckeylen, 1);
+#endif
+
+ ctx->enckeylen = enckeylen;
+
+ ret = build_sh_desc_ipsec(ctx);
+ if (ret) {
+ dma_unmap_single(jrdev, ctx->key_phys, ctx->split_key_pad_len +
+ enckeylen, DMA_TO_DEVICE);
+ kfree(ctx->key);
+ }
+
+ return ret;
+badkey:
+ crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+}
+
+struct link_tbl_entry {
+ u64 ptr;
+ u32 len;
+ u8 reserved;
+ u8 buf_pool_id;
+ u16 offset;
+};
+
+/*
+ * ipsec_esp_edesc - s/w-extended ipsec_esp descriptor
+ * @src_nents: number of segments in input scatterlist
+ * @dst_nents: number of segments in output scatterlist
+ * @assoc_nents: number of segments in associated data (SPI+Seq) scatterlist
+ * @desc: h/w descriptor (variable length; must not exceed MAX_CAAM_DESCSIZE)
+ * @link_tbl_bytes: length of dma mapped link_tbl space
+ * @link_tbl_dma: bus physical mapped address of h/w link table
+ * @hw_desc: the h/w job descriptor followed by any referenced link tables
+ */
+struct ipsec_esp_edesc {
+ int assoc_nents;
+ int src_nents;
+ int dst_nents;
+ int link_tbl_bytes;
+ dma_addr_t link_tbl_dma;
+ struct link_tbl_entry *link_tbl;
+ u32 hw_desc[0];
+};
+
+static void ipsec_esp_unmap(struct device *dev,
+ struct ipsec_esp_edesc *edesc,
+ struct aead_request *areq)
+{
+ dma_unmap_sg(dev, areq->assoc, edesc->assoc_nents, DMA_TO_DEVICE);
+
+ if (unlikely(areq->dst != areq->src)) {
+ dma_unmap_sg(dev, areq->src, edesc->src_nents,
+ DMA_TO_DEVICE);
+ dma_unmap_sg(dev, areq->dst, edesc->dst_nents,
+ DMA_FROM_DEVICE);
+ } else {
+ dma_unmap_sg(dev, areq->src, edesc->src_nents,
+ DMA_BIDIRECTIONAL);
+ }
+
+ if (edesc->link_tbl_bytes)
+ dma_unmap_single(dev, edesc->link_tbl_dma,
+ edesc->link_tbl_bytes,
+ DMA_TO_DEVICE);
+}
+
+/*
+ * ipsec_esp descriptor callbacks
+ */
+static void ipsec_esp_encrypt_done(struct device *jrdev, u32 *desc, u32 err,
+ void *context)
+{
+ struct aead_request *areq = context;
+ struct ipsec_esp_edesc *edesc;
+#ifdef DEBUG
+ struct crypto_aead *aead = crypto_aead_reqtfm(areq);
+ int ivsize = crypto_aead_ivsize(aead);
+ struct caam_ctx *ctx = crypto_aead_ctx(aead);
+
+ dev_err(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
+#endif
+ edesc = (struct ipsec_esp_edesc *)((char *)desc -
+ offsetof(struct ipsec_esp_edesc, hw_desc));
+
+ if (err) {
+ char tmp[CAAM_ERROR_STR_MAX];
+
+ dev_err(jrdev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
+ }
+
+ ipsec_esp_unmap(jrdev, edesc, areq);
+
+#ifdef DEBUG
+ print_hex_dump(KERN_ERR, "assoc @"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(areq->assoc),
+ areq->assoclen , 1);
+ print_hex_dump(KERN_ERR, "dstiv @"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(areq->src) - ivsize,
+ edesc->src_nents ? 100 : ivsize, 1);
+ print_hex_dump(KERN_ERR, "dst @"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(areq->src),
+ edesc->src_nents ? 100 : areq->cryptlen +
+ ctx->authsize + 4, 1);
+#endif
+
+ kfree(edesc);
+
+ aead_request_complete(areq, err);
+}
+
+static void ipsec_esp_decrypt_done(struct device *jrdev, u32 *desc, u32 err,
+ void *context)
+{
+ struct aead_request *areq = context;
+ struct ipsec_esp_edesc *edesc;
+#ifdef DEBUG
+ struct crypto_aead *aead = crypto_aead_reqtfm(areq);
+ struct caam_ctx *ctx = crypto_aead_ctx(aead);
+
+ dev_err(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
+#endif
+ edesc = (struct ipsec_esp_edesc *)((char *)desc -
+ offsetof(struct ipsec_esp_edesc, hw_desc));
+
+ if (err) {
+ char tmp[CAAM_ERROR_STR_MAX];
+
+ dev_err(jrdev, "%08x: %s\n", err, caam_jr_strstatus(tmp, err));
+ }
+
+ ipsec_esp_unmap(jrdev, edesc, areq);
+
+ /*
+ * verify hw auth check passed else return -EBADMSG
+ */
+ if ((err & JRSTA_CCBERR_ERRID_MASK) == JRSTA_CCBERR_ERRID_ICVCHK)
+ err = -EBADMSG;
+
+#ifdef DEBUG
+ print_hex_dump(KERN_ERR, "iphdrout@"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4,
+ ((char *)sg_virt(areq->assoc) - sizeof(struct iphdr)),
+ sizeof(struct iphdr) + areq->assoclen +
+ ((areq->cryptlen > 1500) ? 1500 : areq->cryptlen) +
+ ctx->authsize + 36, 1);
+ if (!err && edesc->link_tbl_bytes) {
+ struct scatterlist *sg = sg_last(areq->src, edesc->src_nents);
+ print_hex_dump(KERN_ERR, "sglastout@"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(sg),
+ sg->length + ctx->authsize + 16, 1);
+ }
+#endif
+ kfree(edesc);
+
+ aead_request_complete(areq, err);
+}
+
+/*
+ * convert scatterlist to h/w link table format
+ * scatterlist must have been previously dma mapped
+ */
+static void sg_to_link_tbl(struct scatterlist *sg, int sg_count,
+ struct link_tbl_entry *link_tbl_ptr, u32 offset)
+{
+ while (sg_count) {
+ link_tbl_ptr->ptr = sg_dma_address(sg);
+ link_tbl_ptr->len = sg_dma_len(sg);
+ link_tbl_ptr->reserved = 0;
+ link_tbl_ptr->buf_pool_id = 0;
+ link_tbl_ptr->offset = offset;
+ link_tbl_ptr++;
+ sg = sg_next(sg);
+ sg_count--;
+ }
+
+ /* set Final bit (marks end of link table) */
+ link_tbl_ptr--;
+ link_tbl_ptr->len |= 0x40000000;
+}
+
+/*
+ * fill in and submit ipsec_esp job descriptor
+ */
+static int ipsec_esp(struct ipsec_esp_edesc *edesc, struct aead_request *areq,
+ u32 encrypt,
+ void (*callback) (struct device *dev, u32 *desc,
+ u32 err, void *context))
+{
+ struct crypto_aead *aead = crypto_aead_reqtfm(areq);
+ struct caam_ctx *ctx = crypto_aead_ctx(aead);
+ struct device *jrdev = ctx->jrdev;
+ u32 *desc = edesc->hw_desc, options;
+ int ret, sg_count, assoc_sg_count;
+ int ivsize = crypto_aead_ivsize(aead);
+ int authsize = ctx->authsize;
+ dma_addr_t ptr, dst_dma, src_dma;
+#ifdef DEBUG
+ u32 *sh_desc = ctx->sh_desc;
+
+ debug("assoclen %d cryptlen %d authsize %d\n",
+ areq->assoclen, areq->cryptlen, authsize);
+ print_hex_dump(KERN_ERR, "assoc @"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(areq->assoc),
+ areq->assoclen , 1);
+ print_hex_dump(KERN_ERR, "presciv@"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(areq->src) - ivsize,
+ edesc->src_nents ? 100 : ivsize, 1);
+ print_hex_dump(KERN_ERR, "src @"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(areq->src),
+ edesc->src_nents ? 100 : areq->cryptlen + authsize, 1);
+ print_hex_dump(KERN_ERR, "shrdesc@"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, sh_desc,
+ desc_bytes(sh_desc), 1);
+#endif
+ assoc_sg_count = dma_map_sg(jrdev, areq->assoc, edesc->assoc_nents ?: 1,
+ DMA_TO_DEVICE);
+ if (areq->src == areq->dst)
+ sg_count = dma_map_sg(jrdev, areq->src, edesc->src_nents ? : 1,
+ DMA_BIDIRECTIONAL);
+ else
+ sg_count = dma_map_sg(jrdev, areq->src, edesc->src_nents ? : 1,
+ DMA_TO_DEVICE);
+
+ /* start auth operation */
+ append_operation(desc, ctx->class2_alg_type | OP_ALG_AS_INITFINAL |
+ (encrypt ? : OP_ALG_ICV_ON));
+
+ /* Load FIFO with data for Class 2 CHA */
+ options = FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG;
+ if (!edesc->assoc_nents) {
+ ptr = sg_dma_address(areq->assoc);
+ } else {
+ sg_to_link_tbl(areq->assoc, edesc->assoc_nents,
+ edesc->link_tbl, 0);
+ ptr = edesc->link_tbl_dma;
+ options |= LDST_SGF;
+ }
+ append_fifo_load(desc, ptr, areq->assoclen, options);
+
+ /* copy iv from cipher/class1 input context to class2 infifo */
+ append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_CLASS2INFIFO | ivsize);
+
+ if (!encrypt) {
+ u32 *jump_cmd, *uncond_jump_cmd;
+
+ /* JUMP if shared */
+ jump_cmd = append_jump(desc, JUMP_TEST_ALL | JUMP_COND_SHRD);
+
+ /* start class 1 (cipher) operation, non-shared version */
+ append_operation(desc, ctx->class1_alg_type |
+ OP_ALG_AS_INITFINAL);
+
+ uncond_jump_cmd = append_jump(desc, 0);
+
+ set_jump_tgt_here(desc, jump_cmd);
+
+ /* start class 1 (cipher) operation, shared version */
+ append_operation(desc, ctx->class1_alg_type |
+ OP_ALG_AS_INITFINAL | OP_ALG_AAI_DK);
+ set_jump_tgt_here(desc, uncond_jump_cmd);
+ } else
+ append_operation(desc, ctx->class1_alg_type |
+ OP_ALG_AS_INITFINAL | encrypt);
+
+ /* load payload & instruct to class2 to snoop class 1 if encrypting */
+ options = 0;
+ if (!edesc->src_nents) {
+ src_dma = sg_dma_address(areq->src);
+ } else {
+ sg_to_link_tbl(areq->src, edesc->src_nents, edesc->link_tbl +
+ edesc->assoc_nents, 0);
+ src_dma = edesc->link_tbl_dma + edesc->assoc_nents *
+ sizeof(struct link_tbl_entry);
+ options |= LDST_SGF;
+ }
+ append_seq_in_ptr(desc, src_dma, areq->cryptlen + authsize, options);
+ append_seq_fifo_load(desc, areq->cryptlen, FIFOLD_CLASS_BOTH |
+ FIFOLD_TYPE_LASTBOTH |
+ (encrypt ? FIFOLD_TYPE_MSG1OUT2
+ : FIFOLD_TYPE_MSG));
+
+ /* specify destination */
+ if (areq->src == areq->dst) {
+ dst_dma = src_dma;
+ } else {
+ sg_count = dma_map_sg(jrdev, areq->dst, edesc->dst_nents ? : 1,
+ DMA_FROM_DEVICE);
+ if (!edesc->dst_nents) {
+ dst_dma = sg_dma_address(areq->dst);
+ options = 0;
+ } else {
+ sg_to_link_tbl(areq->dst, edesc->dst_nents,
+ edesc->link_tbl + edesc->assoc_nents +
+ edesc->src_nents, 0);
+ dst_dma = edesc->link_tbl_dma + (edesc->assoc_nents +
+ edesc->src_nents) *
+ sizeof(struct link_tbl_entry);
+ options = LDST_SGF;
+ }
+ }
+ append_seq_out_ptr(desc, dst_dma, areq->cryptlen + authsize, options);
+ append_seq_fifo_store(desc, areq->cryptlen, FIFOST_TYPE_MESSAGE_DATA);
+
+ /* ICV */
+ if (encrypt)
+ append_seq_store(desc, authsize, LDST_CLASS_2_CCB |
+ LDST_SRCDST_BYTE_CONTEXT);
+ else
+ append_seq_fifo_load(desc, authsize, FIFOLD_CLASS_CLASS2 |
+ FIFOLD_TYPE_LAST2 | FIFOLD_TYPE_ICV);
+
+#ifdef DEBUG
+ debug("job_desc_len %d\n", desc_len(desc));
+ print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc) , 1);
+ print_hex_dump(KERN_ERR, "jdlinkt@"xstr(__LINE__)": ",
+ DUMP_PREFIX_ADDRESS, 16, 4, edesc->link_tbl,
+ edesc->link_tbl_bytes, 1);
+#endif
+
+ ret = caam_jr_enqueue(jrdev, desc, callback, areq);
+ if (!ret)
+ ret = -EINPROGRESS;
+ else {
+ ipsec_esp_unmap(jrdev, edesc, areq);
+ kfree(edesc);
+ }
+
+ return ret;
+}
+
+/*
+ * derive number of elements in scatterlist
+ */
+static int sg_count(struct scatterlist *sg_list, int nbytes, int *chained)
+{
+ struct scatterlist *sg = sg_list;
+ int sg_nents = 0;
+
+ *chained = 0;
+ while (nbytes > 0) {
+ sg_nents++;
+ nbytes -= sg->length;
+ if (!sg_is_last(sg) && (sg + 1)->length == 0)
+ *chained = 1;
+ sg = scatterwalk_sg_next(sg);
+ }
+
+ return sg_nents;
+}
+
+/*
+ * allocate and map the ipsec_esp extended descriptor
+ */
+static struct ipsec_esp_edesc *ipsec_esp_edesc_alloc(struct aead_request *areq,
+ int desc_bytes)
+{
+ struct crypto_aead *aead = crypto_aead_reqtfm(areq);
+ struct caam_ctx *ctx = crypto_aead_ctx(aead);
+ struct device *jrdev = ctx->jrdev;
+ gfp_t flags = areq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
+ GFP_ATOMIC;
+ int assoc_nents, src_nents, dst_nents = 0, chained, link_tbl_bytes;
+ struct ipsec_esp_edesc *edesc;
+
+ assoc_nents = sg_count(areq->assoc, areq->assoclen, &chained);
+ BUG_ON(chained);
+ if (likely(assoc_nents == 1))
+ assoc_nents = 0;
+
+ src_nents = sg_count(areq->src, areq->cryptlen + ctx->authsize,
+ &chained);
+ BUG_ON(chained);
+ if (src_nents == 1)
+ src_nents = 0;
+
+ if (unlikely(areq->dst != areq->src)) {
+ dst_nents = sg_count(areq->dst, areq->cryptlen + ctx->authsize,
+ &chained);
+ BUG_ON(chained);
+ if (dst_nents == 1)
+ dst_nents = 0;
+ }
+
+ link_tbl_bytes = (assoc_nents + src_nents + dst_nents) *
+ sizeof(struct link_tbl_entry);
+ debug("link_tbl_bytes %d\n", link_tbl_bytes);
+
+ /* allocate space for base edesc and hw desc commands, link tables */
+ edesc = kmalloc(sizeof(struct ipsec_esp_edesc) + desc_bytes +
+ link_tbl_bytes, GFP_DMA | flags);
+ if (!edesc) {
+ dev_err(jrdev, "could not allocate extended descriptor\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ edesc->assoc_nents = assoc_nents;
+ edesc->src_nents = src_nents;
+ edesc->dst_nents = dst_nents;
+ edesc->link_tbl = (void *)edesc + sizeof(struct ipsec_esp_edesc) +
+ desc_bytes;
+ edesc->link_tbl_dma = dma_map_single(jrdev, edesc->link_tbl,
+ link_tbl_bytes, DMA_TO_DEVICE);
+ edesc->link_tbl_bytes = link_tbl_bytes;
+
+ return edesc;
+}
+
+static int aead_authenc_encrypt(struct aead_request *areq)
+{
+ struct ipsec_esp_edesc *edesc;
+ struct crypto_aead *aead = crypto_aead_reqtfm(areq);
+ struct caam_ctx *ctx = crypto_aead_ctx(aead);
+ struct device *jrdev = ctx->jrdev;
+ int ivsize = crypto_aead_ivsize(aead);
+ u32 *desc;
+ dma_addr_t iv_dma;
+
+ /* allocate extended descriptor */
+ edesc = ipsec_esp_edesc_alloc(areq, DESC_AEAD_ENCRYPT_TEXT_LEN *
+ CAAM_CMD_SZ);
+ if (IS_ERR(edesc))
+ return PTR_ERR(edesc);
+
+ desc = edesc->hw_desc;
+
+ /* insert shared descriptor pointer */
+ init_job_desc_shared(desc, ctx->shared_desc_phys,
+ desc_len(ctx->sh_desc), HDR_SHARE_DEFER);
+
+ iv_dma = dma_map_single(jrdev, areq->iv, ivsize, DMA_TO_DEVICE);
+ /* check dma error */
+
+ append_load(desc, iv_dma, ivsize,
+ LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT);
+
+ return ipsec_esp(edesc, areq, OP_ALG_ENCRYPT, ipsec_esp_encrypt_done);
+}
+
+static int aead_authenc_decrypt(struct aead_request *req)
+{
+ struct crypto_aead *aead = crypto_aead_reqtfm(req);
+ int ivsize = crypto_aead_ivsize(aead);
+ struct caam_ctx *ctx = crypto_aead_ctx(aead);
+ struct device *jrdev = ctx->jrdev;
+ struct ipsec_esp_edesc *edesc;
+ u32 *desc;
+ dma_addr_t iv_dma;
+
+ req->cryptlen -= ctx->authsize;
+
+ /* allocate extended descriptor */
+ edesc = ipsec_esp_edesc_alloc(req, DESC_AEAD_DECRYPT_TEXT_LEN *
+ CAAM_CMD_SZ);
+ if (IS_ERR(edesc))
+ return PTR_ERR(edesc);
+
+ desc = edesc->hw_desc;
+
+ /* insert shared descriptor pointer */
+ init_job_desc_shared(desc, ctx->shared_desc_phys,
+ desc_len(ctx->sh_desc), HDR_SHARE_DEFER);
+
+ iv_dma = dma_map_single(jrdev, req->iv, ivsize, DMA_TO_DEVICE);
+ /* check dma error */
+
+ append_load(desc, iv_dma, ivsize,
+ LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT);
+
+ return ipsec_esp(edesc, req, !OP_ALG_ENCRYPT, ipsec_esp_decrypt_done);
+}
+
+static int aead_authenc_givencrypt(struct aead_givcrypt_request *req)
+{
+ struct aead_request *areq = &req->areq;
+ struct ipsec_esp_edesc *edesc;
+ struct crypto_aead *aead = crypto_aead_reqtfm(areq);
+ struct caam_ctx *ctx = crypto_aead_ctx(aead);
+ struct device *jrdev = ctx->jrdev;
+ int ivsize = crypto_aead_ivsize(aead);
+ dma_addr_t iv_dma;
+ u32 *desc;
+
+ iv_dma = dma_map_single(jrdev, req->giv, ivsize, DMA_FROM_DEVICE);
+
+ debug("%s: giv %p\n", __func__, req->giv);
+
+ /* allocate extended descriptor */
+ edesc = ipsec_esp_edesc_alloc(areq, DESC_AEAD_GIVENCRYPT_TEXT_LEN *
+ CAAM_CMD_SZ);
+ if (IS_ERR(edesc))
+ return PTR_ERR(edesc);
+
+ desc = edesc->hw_desc;
+
+ /* insert shared descriptor pointer */
+ init_job_desc_shared(desc, ctx->shared_desc_phys,
+ desc_len(ctx->sh_desc), HDR_SHARE_DEFER);
+
+ /*
+ * LOAD IMM Info FIFO
+ * to DECO, Last, Padding, Random, Message, 16 bytes
+ */
+ append_load_imm_u32(desc, NFIFOENTRY_DEST_DECO | NFIFOENTRY_LC1 |
+ NFIFOENTRY_STYPE_PAD | NFIFOENTRY_DTYPE_MSG |
+ NFIFOENTRY_PTYPE_RND | ivsize,
+ LDST_SRCDST_WORD_INFO_FIFO);
+
+ /*
+ * disable info fifo entries since the above serves as the entry
+ * this way, the MOVE command won't generate an entry.
+ * Note that this isn't required in more recent versions of
+ * SEC as a MOVE that doesn't do info FIFO entries is available.
+ */
+ append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
+
+ /* MOVE DECO Alignment -> C1 Context 16 bytes */
+ append_move(desc, MOVE_SRC_INFIFO | MOVE_DEST_CLASS1CTX | ivsize);
+
+ /* re-enable info fifo entries */
+ append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
+
+ /* MOVE C1 Context -> OFIFO 16 bytes */
+ append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_OUTFIFO | ivsize);
+
+ append_fifo_store(desc, iv_dma, ivsize, FIFOST_TYPE_MESSAGE_DATA);
+
+ return ipsec_esp(edesc, areq, OP_ALG_ENCRYPT, ipsec_esp_encrypt_done);
+}
+
+struct caam_alg_template {
+ char name[CRYPTO_MAX_ALG_NAME];
+ char driver_name[CRYPTO_MAX_ALG_NAME];
+ unsigned int blocksize;
+ struct aead_alg aead;
+ u32 class1_alg_type;
+ u32 class2_alg_type;
+ u32 alg_op;
+};
+
+static struct caam_alg_template driver_algs[] = {
+ /* single-pass ipsec_esp descriptor */
+ {
+ .name = "authenc(hmac(sha1),cbc(aes))",
+ .driver_name = "authenc-hmac-sha1-cbc-aes-caam",
+ .blocksize = AES_BLOCK_SIZE,
+ .aead = {
+ .setkey = aead_authenc_setkey,
+ .setauthsize = aead_authenc_setauthsize,
+ .encrypt = aead_authenc_encrypt,
+ .decrypt = aead_authenc_decrypt,
+ .givencrypt = aead_authenc_givencrypt,
+ .geniv = "<built-in>",
+ .ivsize = AES_BLOCK_SIZE,
+ .maxauthsize = SHA1_DIGEST_SIZE,
+ },
+ .class1_alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_CBC,
+ .class2_alg_type = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC_PRECOMP,
+ .alg_op = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC,
+ },
+ {
+ .name = "authenc(hmac(sha256),cbc(aes))",
+ .driver_name = "authenc-hmac-sha256-cbc-aes-caam",
+ .blocksize = AES_BLOCK_SIZE,
+ .aead = {
+ .setkey = aead_authenc_setkey,
+ .setauthsize = aead_authenc_setauthsize,
+ .encrypt = aead_authenc_encrypt,
+ .decrypt = aead_authenc_decrypt,
+ .givencrypt = aead_authenc_givencrypt,
+ .geniv = "<built-in>",
+ .ivsize = AES_BLOCK_SIZE,
+ .maxauthsize = SHA256_DIGEST_SIZE,
+ },
+ .class1_alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_CBC,
+ .class2_alg_type = OP_ALG_ALGSEL_SHA256 |
+ OP_ALG_AAI_HMAC_PRECOMP,
+ .alg_op = OP_ALG_ALGSEL_SHA256 | OP_ALG_AAI_HMAC,
+ },
+ {
+ .name = "authenc(hmac(sha512),cbc(aes))",
+ .driver_name = "authenc-hmac-sha512-cbc-aes-caam",
+ .blocksize = AES_BLOCK_SIZE,
+ .aead = {
+ .setkey = aead_authenc_setkey,
+ .setauthsize = aead_authenc_setauthsize,
+ .encrypt = aead_authenc_encrypt,
+ .decrypt = aead_authenc_decrypt,
+ .givencrypt = aead_authenc_givencrypt,
+ .geniv = "<built-in>",
+ .ivsize = AES_BLOCK_SIZE,
+ .maxauthsize = SHA512_DIGEST_SIZE,
+ },
+ .class1_alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_CBC,
+ .class2_alg_type = OP_ALG_ALGSEL_SHA512 |
+ OP_ALG_AAI_HMAC_PRECOMP,
+ .alg_op = OP_ALG_ALGSEL_SHA512 | OP_ALG_AAI_HMAC,
+ },
+ {
+ .name = "authenc(hmac(sha1),cbc(des3_ede))",
+ .driver_name = "authenc-hmac-sha1-cbc-des3_ede-caam",
+ .blocksize = DES3_EDE_BLOCK_SIZE,
+ .aead = {
+ .setkey = aead_authenc_setkey,
+ .setauthsize = aead_authenc_setauthsize,
+ .encrypt = aead_authenc_encrypt,
+ .decrypt = aead_authenc_decrypt,
+ .givencrypt = aead_authenc_givencrypt,
+ .geniv = "<built-in>",
+ .ivsize = DES3_EDE_BLOCK_SIZE,
+ .maxauthsize = SHA1_DIGEST_SIZE,
+ },
+ .class1_alg_type = OP_ALG_ALGSEL_3DES | OP_ALG_AAI_CBC,
+ .class2_alg_type = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC_PRECOMP,
+ .alg_op = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC,
+ },
+ {
+ .name = "authenc(hmac(sha256),cbc(des3_ede))",
+ .driver_name = "authenc-hmac-sha256-cbc-des3_ede-caam",
+ .blocksize = DES3_EDE_BLOCK_SIZE,
+ .aead = {
+ .setkey = aead_authenc_setkey,
+ .setauthsize = aead_authenc_setauthsize,
+ .encrypt = aead_authenc_encrypt,
+ .decrypt = aead_authenc_decrypt,
+ .givencrypt = aead_authenc_givencrypt,
+ .geniv = "<built-in>",
+ .ivsize = DES3_EDE_BLOCK_SIZE,
+ .maxauthsize = SHA256_DIGEST_SIZE,
+ },
+ .class1_alg_type = OP_ALG_ALGSEL_3DES | OP_ALG_AAI_CBC,
+ .class2_alg_type = OP_ALG_ALGSEL_SHA256 |
+ OP_ALG_AAI_HMAC_PRECOMP,
+ .alg_op = OP_ALG_ALGSEL_SHA256 | OP_ALG_AAI_HMAC,
+ },
+ {
+ .name = "authenc(hmac(sha512),cbc(des3_ede))",
+ .driver_name = "authenc-hmac-sha512-cbc-des3_ede-caam",
+ .blocksize = DES3_EDE_BLOCK_SIZE,
+ .aead = {
+ .setkey = aead_authenc_setkey,
+ .setauthsize = aead_authenc_setauthsize,
+ .encrypt = aead_authenc_encrypt,
+ .decrypt = aead_authenc_decrypt,
+ .givencrypt = aead_authenc_givencrypt,
+ .geniv = "<built-in>",
+ .ivsize = DES3_EDE_BLOCK_SIZE,
+ .maxauthsize = SHA512_DIGEST_SIZE,
+ },
+ .class1_alg_type = OP_ALG_ALGSEL_3DES | OP_ALG_AAI_CBC,
+ .class2_alg_type = OP_ALG_ALGSEL_SHA512 |
+ OP_ALG_AAI_HMAC_PRECOMP,
+ .alg_op = OP_ALG_ALGSEL_SHA512 | OP_ALG_AAI_HMAC,
+ },
+ {
+ .name = "authenc(hmac(sha1),cbc(des))",
+ .driver_name = "authenc-hmac-sha1-cbc-des-caam",
+ .blocksize = DES_BLOCK_SIZE,
+ .aead = {
+ .setkey = aead_authenc_setkey,
+ .setauthsize = aead_authenc_setauthsize,
+ .encrypt = aead_authenc_encrypt,
+ .decrypt = aead_authenc_decrypt,
+ .givencrypt = aead_authenc_givencrypt,
+ .geniv = "<built-in>",
+ .ivsize = DES_BLOCK_SIZE,
+ .maxauthsize = SHA1_DIGEST_SIZE,
+ },
+ .class1_alg_type = OP_ALG_ALGSEL_DES | OP_ALG_AAI_CBC,
+ .class2_alg_type = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC_PRECOMP,
+ .alg_op = OP_ALG_ALGSEL_SHA1 | OP_ALG_AAI_HMAC,
+ },
+ {
+ .name = "authenc(hmac(sha256),cbc(des))",
+ .driver_name = "authenc-hmac-sha256-cbc-des-caam",
+ .blocksize = DES_BLOCK_SIZE,
+ .aead = {
+ .setkey = aead_authenc_setkey,
+ .setauthsize = aead_authenc_setauthsize,
+ .encrypt = aead_authenc_encrypt,
+ .decrypt = aead_authenc_decrypt,
+ .givencrypt = aead_authenc_givencrypt,
+ .geniv = "<built-in>",
+ .ivsize = DES_BLOCK_SIZE,
+ .maxauthsize = SHA256_DIGEST_SIZE,
+ },
+ .class1_alg_type = OP_ALG_ALGSEL_DES | OP_ALG_AAI_CBC,
+ .class2_alg_type = OP_ALG_ALGSEL_SHA256 |
+ OP_ALG_AAI_HMAC_PRECOMP,
+ .alg_op = OP_ALG_ALGSEL_SHA256 | OP_ALG_AAI_HMAC,
+ },
+ {
+ .name = "authenc(hmac(sha512),cbc(des))",
+ .driver_name = "authenc-hmac-sha512-cbc-des-caam",
+ .blocksize = DES_BLOCK_SIZE,
+ .aead = {
+ .setkey = aead_authenc_setkey,
+ .setauthsize = aead_authenc_setauthsize,
+ .encrypt = aead_authenc_encrypt,
+ .decrypt = aead_authenc_decrypt,
+ .givencrypt = aead_authenc_givencrypt,
+ .geniv = "<built-in>",
+ .ivsize = DES_BLOCK_SIZE,
+ .maxauthsize = SHA512_DIGEST_SIZE,
+ },
+ .class1_alg_type = OP_ALG_ALGSEL_DES | OP_ALG_AAI_CBC,
+ .class2_alg_type = OP_ALG_ALGSEL_SHA512 |
+ OP_ALG_AAI_HMAC_PRECOMP,
+ .alg_op = OP_ALG_ALGSEL_SHA512 | OP_ALG_AAI_HMAC,
+ },
+};
+
+struct caam_crypto_alg {
+ struct list_head entry;
+ struct device *ctrldev;
+ int class1_alg_type;
+ int class2_alg_type;
+ int alg_op;
+ struct crypto_alg crypto_alg;
+};
+
+static int caam_cra_init(struct crypto_tfm *tfm)
+{
+ struct crypto_alg *alg = tfm->__crt_alg;
+ struct caam_crypto_alg *caam_alg =
+ container_of(alg, struct caam_crypto_alg, crypto_alg);
+ struct caam_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct caam_drv_private *priv = dev_get_drvdata(caam_alg->ctrldev);
+ int tgt_jr = atomic_inc_return(&priv->tfm_count);
+
+ /*
+ * distribute tfms across job rings to ensure in-order
+ * crypto request processing per tfm
+ */
+ ctx->jrdev = priv->algapi_jr[(tgt_jr / 2) % priv->num_jrs_for_algapi];
+
+ /* copy descriptor header template value */
+ ctx->class1_alg_type = OP_TYPE_CLASS1_ALG | caam_alg->class1_alg_type;
+ ctx->class2_alg_type = OP_TYPE_CLASS2_ALG | caam_alg->class2_alg_type;
+ ctx->alg_op = OP_TYPE_CLASS2_ALG | caam_alg->alg_op;
+
+ return 0;
+}
+
+static void caam_cra_exit(struct crypto_tfm *tfm)
+{
+ struct caam_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ if (!dma_mapping_error(ctx->jrdev, ctx->shared_desc_phys))
+ dma_unmap_single(ctx->jrdev, ctx->shared_desc_phys,
+ desc_bytes(ctx->sh_desc), DMA_TO_DEVICE);
+ kfree(ctx->sh_desc);
+
+ if (!dma_mapping_error(ctx->jrdev, ctx->key_phys))
+ dma_unmap_single(ctx->jrdev, ctx->key_phys,
+ ctx->split_key_pad_len + ctx->enckeylen,
+ DMA_TO_DEVICE);
+ kfree(ctx->key);
+}
+
+static void __exit caam_algapi_exit(void)
+{
+
+ struct device_node *dev_node;
+ struct platform_device *pdev;
+ struct device *ctrldev;
+ struct caam_drv_private *priv;
+ struct caam_crypto_alg *t_alg, *n;
+ int i, err;
+
+ dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0");
+ if (!dev_node)
+ return;
+
+ pdev = of_find_device_by_node(dev_node);
+ if (!pdev)
+ return;
+
+ ctrldev = &pdev->dev;
+ of_node_put(dev_node);
+ priv = dev_get_drvdata(ctrldev);
+
+ if (!priv->alg_list.next)
+ return;
+
+ list_for_each_entry_safe(t_alg, n, &priv->alg_list, entry) {
+ crypto_unregister_alg(&t_alg->crypto_alg);
+ list_del(&t_alg->entry);
+ kfree(t_alg);
+ }
+
+ for (i = 0; i < priv->total_jobrs; i++) {
+ err = caam_jr_deregister(priv->algapi_jr[i]);
+ if (err < 0)
+ break;
+ }
+ kfree(priv->algapi_jr);
+}
+
+static struct caam_crypto_alg *caam_alg_alloc(struct device *ctrldev,
+ struct caam_alg_template
+ *template)
+{
+ struct caam_crypto_alg *t_alg;
+ struct crypto_alg *alg;
+
+ t_alg = kzalloc(sizeof(struct caam_crypto_alg), GFP_KERNEL);
+ if (!t_alg) {
+ dev_err(ctrldev, "failed to allocate t_alg\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ alg = &t_alg->crypto_alg;
+
+ snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", template->name);
+ snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
+ template->driver_name);
+ alg->cra_module = THIS_MODULE;
+ alg->cra_init = caam_cra_init;
+ alg->cra_exit = caam_cra_exit;
+ alg->cra_priority = CAAM_CRA_PRIORITY;
+ alg->cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC;
+ alg->cra_blocksize = template->blocksize;
+ alg->cra_alignmask = 0;
+ alg->cra_type = &crypto_aead_type;
+ alg->cra_ctxsize = sizeof(struct caam_ctx);
+ alg->cra_u.aead = template->aead;
+
+ t_alg->class1_alg_type = template->class1_alg_type;
+ t_alg->class2_alg_type = template->class2_alg_type;
+ t_alg->alg_op = template->alg_op;
+ t_alg->ctrldev = ctrldev;
+
+ return t_alg;
+}
+
+static int __init caam_algapi_init(void)
+{
+ struct device_node *dev_node;
+ struct platform_device *pdev;
+ struct device *ctrldev, **jrdev;
+ struct caam_drv_private *priv;
+ int i = 0, err = 0;
+
+ dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0");
+ if (!dev_node)
+ return -ENODEV;
+
+ pdev = of_find_device_by_node(dev_node);
+ if (!pdev)
+ return -ENODEV;
+
+ ctrldev = &pdev->dev;
+ priv = dev_get_drvdata(ctrldev);
+ of_node_put(dev_node);
+
+ INIT_LIST_HEAD(&priv->alg_list);
+
+ jrdev = kmalloc(sizeof(*jrdev) * priv->total_jobrs, GFP_KERNEL);
+ if (!jrdev)
+ return -ENOMEM;
+
+ for (i = 0; i < priv->total_jobrs; i++) {
+ err = caam_jr_register(ctrldev, &jrdev[i]);
+ if (err < 0)
+ break;
+ }
+ if (err < 0 && i == 0) {
+ dev_err(ctrldev, "algapi error in job ring registration: %d\n",
+ err);
+ kfree(jrdev);
+ return err;
+ }
+
+ priv->num_jrs_for_algapi = i;
+ priv->algapi_jr = jrdev;
+ atomic_set(&priv->tfm_count, -1);
+
+ /* register crypto algorithms the device supports */
+ for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
+ /* TODO: check if h/w supports alg */
+ struct caam_crypto_alg *t_alg;
+
+ t_alg = caam_alg_alloc(ctrldev, &driver_algs[i]);
+ if (IS_ERR(t_alg)) {
+ err = PTR_ERR(t_alg);
+ dev_warn(ctrldev, "%s alg allocation failed\n",
+ driver_algs[i].driver_name);
+ continue;
+ }
+
+ err = crypto_register_alg(&t_alg->crypto_alg);
+ if (err) {
+ dev_warn(ctrldev, "%s alg registration failed\n",
+ t_alg->crypto_alg.cra_driver_name);
+ kfree(t_alg);
+ } else {
+ list_add_tail(&t_alg->entry, &priv->alg_list);
+ dev_info(ctrldev, "%s\n",
+ t_alg->crypto_alg.cra_driver_name);
+ }
+ }
+
+ return err;
+}
+
+module_init(caam_algapi_init);
+module_exit(caam_algapi_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("FSL CAAM support for crypto API");
+MODULE_AUTHOR("Freescale Semiconductor - NMG/STC");