crypto: ccp - Enable 3DES function on v5 CCPs
Wire up support for Triple DES in ECB mode.
Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c
index 0d82080..0de961a 100644
--- a/drivers/crypto/ccp/ccp-ops.c
+++ b/drivers/crypto/ccp/ccp-ops.c
@@ -16,6 +16,7 @@
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <crypto/scatterwalk.h>
+#include <crypto/des.h>
#include <linux/ccp.h>
#include "ccp-dev.h"
@@ -939,6 +940,200 @@ static int ccp_run_xts_aes_cmd(struct ccp_cmd_queue *cmd_q,
return ret;
}
+static int ccp_run_des3_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
+{
+ struct ccp_des3_engine *des3 = &cmd->u.des3;
+
+ struct ccp_dm_workarea key, ctx;
+ struct ccp_data src, dst;
+ struct ccp_op op;
+ unsigned int dm_offset;
+ unsigned int len_singlekey;
+ bool in_place = false;
+ int ret;
+
+ /* Error checks */
+ if (!cmd_q->ccp->vdata->perform->des3)
+ return -EINVAL;
+
+ if (des3->key_len != DES3_EDE_KEY_SIZE)
+ return -EINVAL;
+
+ if (((des3->mode == CCP_DES3_MODE_ECB) ||
+ (des3->mode == CCP_DES3_MODE_CBC)) &&
+ (des3->src_len & (DES3_EDE_BLOCK_SIZE - 1)))
+ return -EINVAL;
+
+ if (!des3->key || !des3->src || !des3->dst)
+ return -EINVAL;
+
+ if (des3->mode != CCP_DES3_MODE_ECB) {
+ if (des3->iv_len != DES3_EDE_BLOCK_SIZE)
+ return -EINVAL;
+
+ if (!des3->iv)
+ return -EINVAL;
+ }
+
+ ret = -EIO;
+ /* Zero out all the fields of the command desc */
+ memset(&op, 0, sizeof(op));
+
+ /* Set up the Function field */
+ op.cmd_q = cmd_q;
+ op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
+ op.sb_key = cmd_q->sb_key;
+
+ op.init = (des3->mode == CCP_DES3_MODE_ECB) ? 0 : 1;
+ op.u.des3.type = des3->type;
+ op.u.des3.mode = des3->mode;
+ op.u.des3.action = des3->action;
+
+ /*
+ * All supported key sizes fit in a single (32-byte) KSB entry and
+ * (like AES) must be in little endian format. Use the 256-bit byte
+ * swap passthru option to convert from big endian to little endian.
+ */
+ ret = ccp_init_dm_workarea(&key, cmd_q,
+ CCP_DES3_KEY_SB_COUNT * CCP_SB_BYTES,
+ DMA_TO_DEVICE);
+ if (ret)
+ return ret;
+
+ /*
+ * The contents of the key triplet are in the reverse order of what
+ * is required by the engine. Copy the 3 pieces individually to put
+ * them where they belong.
+ */
+ dm_offset = CCP_SB_BYTES - des3->key_len; /* Basic offset */
+
+ len_singlekey = des3->key_len / 3;
+ ccp_set_dm_area(&key, dm_offset + 2 * len_singlekey,
+ des3->key, 0, len_singlekey);
+ ccp_set_dm_area(&key, dm_offset + len_singlekey,
+ des3->key, len_singlekey, len_singlekey);
+ ccp_set_dm_area(&key, dm_offset,
+ des3->key, 2 * len_singlekey, len_singlekey);
+
+ /* Copy the key to the SB */
+ ret = ccp_copy_to_sb(cmd_q, &key, op.jobid, op.sb_key,
+ CCP_PASSTHRU_BYTESWAP_256BIT);
+ if (ret) {
+ cmd->engine_error = cmd_q->cmd_error;
+ goto e_key;
+ }
+
+ /*
+ * The DES3 context fits in a single (32-byte) KSB entry and
+ * must be in little endian format. Use the 256-bit byte swap
+ * passthru option to convert from big endian to little endian.
+ */
+ if (des3->mode != CCP_DES3_MODE_ECB) {
+ u32 load_mode;
+
+ op.sb_ctx = cmd_q->sb_ctx;
+
+ ret = ccp_init_dm_workarea(&ctx, cmd_q,
+ CCP_DES3_CTX_SB_COUNT * CCP_SB_BYTES,
+ DMA_BIDIRECTIONAL);
+ if (ret)
+ goto e_key;
+
+ /* Load the context into the LSB */
+ dm_offset = CCP_SB_BYTES - des3->iv_len;
+ ccp_set_dm_area(&ctx, dm_offset, des3->iv, 0, des3->iv_len);
+
+ if (cmd_q->ccp->vdata->version == CCP_VERSION(3, 0))
+ load_mode = CCP_PASSTHRU_BYTESWAP_NOOP;
+ else
+ load_mode = CCP_PASSTHRU_BYTESWAP_256BIT;
+ ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
+ load_mode);
+ if (ret) {
+ cmd->engine_error = cmd_q->cmd_error;
+ goto e_ctx;
+ }
+ }
+
+ /*
+ * Prepare the input and output data workareas. For in-place
+ * operations we need to set the dma direction to BIDIRECTIONAL
+ * and copy the src workarea to the dst workarea.
+ */
+ if (sg_virt(des3->src) == sg_virt(des3->dst))
+ in_place = true;
+
+ ret = ccp_init_data(&src, cmd_q, des3->src, des3->src_len,
+ DES3_EDE_BLOCK_SIZE,
+ in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE);
+ if (ret)
+ goto e_ctx;
+
+ if (in_place)
+ dst = src;
+ else {
+ ret = ccp_init_data(&dst, cmd_q, des3->dst, des3->src_len,
+ DES3_EDE_BLOCK_SIZE, DMA_FROM_DEVICE);
+ if (ret)
+ goto e_src;
+ }
+
+ /* Send data to the CCP DES3 engine */
+ while (src.sg_wa.bytes_left) {
+ ccp_prepare_data(&src, &dst, &op, DES3_EDE_BLOCK_SIZE, true);
+ if (!src.sg_wa.bytes_left) {
+ op.eom = 1;
+
+ /* Since we don't retrieve the context in ECB mode
+ * we have to wait for the operation to complete
+ * on the last piece of data
+ */
+ op.soc = 0;
+ }
+
+ ret = cmd_q->ccp->vdata->perform->des3(&op);
+ if (ret) {
+ cmd->engine_error = cmd_q->cmd_error;
+ goto e_dst;
+ }
+
+ ccp_process_data(&src, &dst, &op);
+ }
+
+ if (des3->mode != CCP_DES3_MODE_ECB) {
+ /* Retrieve the context and make BE */
+ ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
+ CCP_PASSTHRU_BYTESWAP_256BIT);
+ if (ret) {
+ cmd->engine_error = cmd_q->cmd_error;
+ goto e_dst;
+ }
+
+ /* ...but we only need the last DES3_EDE_BLOCK_SIZE bytes */
+ if (cmd_q->ccp->vdata->version == CCP_VERSION(3, 0))
+ dm_offset = CCP_SB_BYTES - des3->iv_len;
+ else
+ dm_offset = 0;
+ ccp_get_dm_area(&ctx, dm_offset, des3->iv, 0,
+ DES3_EDE_BLOCK_SIZE);
+ }
+e_dst:
+ if (!in_place)
+ ccp_free_data(&dst, cmd_q);
+
+e_src:
+ ccp_free_data(&src, cmd_q);
+
+e_ctx:
+ if (des3->mode != CCP_DES3_MODE_ECB)
+ ccp_dm_free(&ctx);
+
+e_key:
+ ccp_dm_free(&key);
+
+ return ret;
+}
+
static int ccp_run_sha_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
{
struct ccp_sha_engine *sha = &cmd->u.sha;
@@ -1903,6 +2098,9 @@ int ccp_run_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
case CCP_ENGINE_XTS_AES_128:
ret = ccp_run_xts_aes_cmd(cmd_q, cmd);
break;
+ case CCP_ENGINE_DES3:
+ ret = ccp_run_des3_cmd(cmd_q, cmd);
+ break;
case CCP_ENGINE_SHA:
ret = ccp_run_sha_cmd(cmd_q, cmd);
break;