summaryrefslogtreecommitdiff
path: root/drivers/crypto/caam/desc_constr.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/crypto/caam/desc_constr.h')
-rw-r--r--drivers/crypto/caam/desc_constr.h81
1 files changed, 65 insertions, 16 deletions
diff --git a/drivers/crypto/caam/desc_constr.h b/drivers/crypto/caam/desc_constr.h
index 5988a26a2441..62ce6421bb3f 100644
--- a/drivers/crypto/caam/desc_constr.h
+++ b/drivers/crypto/caam/desc_constr.h
@@ -14,9 +14,41 @@
#define IMMEDIATE (1 << 23)
#define CAAM_CMD_SZ sizeof(u32)
-#define CAAM_PTR_SZ sizeof(dma_addr_t)
+#define CAAM_PTR_SZ caam_ptr_sz
+#define CAAM_PTR_SZ_MAX sizeof(dma_addr_t)
+#define CAAM_PTR_SZ_MIN sizeof(u32)
#define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * MAX_CAAM_DESCSIZE)
-#define DESC_JOB_IO_LEN (CAAM_CMD_SZ * 5 + CAAM_PTR_SZ * 3)
+#define __DESC_JOB_IO_LEN(n) (CAAM_CMD_SZ * 5 + (n) * 3)
+#define DESC_JOB_IO_LEN __DESC_JOB_IO_LEN(CAAM_PTR_SZ)
+#define DESC_JOB_IO_LEN_MAX __DESC_JOB_IO_LEN(CAAM_PTR_SZ_MAX)
+#define DESC_JOB_IO_LEN_MIN __DESC_JOB_IO_LEN(CAAM_PTR_SZ_MIN)
+
+/*
+ * The CAAM QI hardware constructs a job descriptor which points
+ * to shared descriptor (as pointed by context_a of FQ to CAAM).
+ * When the job descriptor is executed by deco, the whole job
+ * descriptor together with shared descriptor gets loaded in
+ * deco buffer which is 64 words long (each 32-bit).
+ *
+ * The job descriptor constructed by QI hardware has layout:
+ *
+ * HEADER (1 word)
+ * Shdesc ptr (1 or 2 words)
+ * SEQ_OUT_PTR (1 word)
+ * Out ptr (1 or 2 words)
+ * Out length (1 word)
+ * SEQ_IN_PTR (1 word)
+ * In ptr (1 or 2 words)
+ * In length (1 word)
+ *
+ * The shdesc ptr is used to fetch shared descriptor contents
+ * into deco buffer.
+ *
+ * Apart from shdesc contents, the total number of words that
+ * get loaded in deco buffer are '8' or '11'. The remaining words
+ * in deco buffer can be used for storing shared descriptor.
+ */
+#define MAX_SDLEN ((CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN_MIN) / CAAM_CMD_SZ)
#ifdef DEBUG
#define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\
@@ -37,6 +69,7 @@
(LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
extern bool caam_little_end;
+extern size_t caam_ptr_sz;
/*
* HW fetches 4 S/G table entries at a time, irrespective of how many entries
@@ -103,9 +136,15 @@ static inline void init_job_desc_pdb(u32 * const desc, u32 options,
static inline void append_ptr(u32 * const desc, dma_addr_t ptr)
{
- dma_addr_t *offset = (dma_addr_t *)desc_end(desc);
+ if (caam_ptr_sz == sizeof(dma_addr_t)) {
+ dma_addr_t *offset = (dma_addr_t *)desc_end(desc);
- *offset = cpu_to_caam_dma(ptr);
+ *offset = cpu_to_caam_dma(ptr);
+ } else {
+ u32 *offset = (u32 *)desc_end(desc);
+
+ *offset = cpu_to_caam_dma(ptr);
+ }
(*desc) = cpu_to_caam32(caam32_to_cpu(*desc) +
CAAM_PTR_SZ / CAAM_CMD_SZ);
@@ -457,8 +496,8 @@ do { \
* functions where it is used.
* @keylen: length of the provided algorithm key, in bytes
* @keylen_pad: padded length of the provided algorithm key, in bytes
- * @key: address where algorithm key resides; virtual address if key_inline
- * is true, dma (bus) address if key_inline is false.
+ * @key_dma: dma (bus) address where algorithm key resides
+ * @key_virt: virtual address where algorithm key resides
* @key_inline: true - key can be inlined in the descriptor; false - key is
* referenced by the descriptor
*/
@@ -466,10 +505,8 @@ struct alginfo {
u32 algtype;
unsigned int keylen;
unsigned int keylen_pad;
- union {
- dma_addr_t key_dma;
- const void *key_virt;
- };
+ dma_addr_t key_dma;
+ const void *key_virt;
bool key_inline;
};
@@ -535,14 +572,26 @@ static inline void append_proto_dkp(u32 * const desc, struct alginfo *adata)
if (adata->key_inline) {
int words;
- append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid |
- OP_PCL_DKP_SRC_IMM | OP_PCL_DKP_DST_IMM |
- adata->keylen);
- append_data(desc, adata->key_virt, adata->keylen);
+ if (adata->keylen > adata->keylen_pad) {
+ append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid |
+ OP_PCL_DKP_SRC_PTR |
+ OP_PCL_DKP_DST_IMM | adata->keylen);
+ append_ptr(desc, adata->key_dma);
+
+ words = (ALIGN(adata->keylen_pad, CAAM_CMD_SZ) -
+ CAAM_PTR_SZ) / CAAM_CMD_SZ;
+ } else {
+ append_operation(desc, OP_TYPE_UNI_PROTOCOL | protid |
+ OP_PCL_DKP_SRC_IMM |
+ OP_PCL_DKP_DST_IMM | adata->keylen);
+ append_data(desc, adata->key_virt, adata->keylen);
+
+ words = (ALIGN(adata->keylen_pad, CAAM_CMD_SZ) -
+ ALIGN(adata->keylen, CAAM_CMD_SZ)) /
+ CAAM_CMD_SZ;
+ }
/* Reserve space in descriptor buffer for the derived key */
- words = (ALIGN(adata->keylen_pad, CAAM_CMD_SZ) -
- ALIGN(adata->keylen, CAAM_CMD_SZ)) / CAAM_CMD_SZ;
if (words)
(*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + words);
} else {