[PATCH] crypto: caam - Remove public key support

[Herbert Xu <herbert@gondor.apana.org.au>]

On Fri, Aug 21, 2026 at 03:18:24PM +1000, Changwei Zou wrote:
> 
> A new version with two patches and a cover letter is available at the following link.

This driver hasn't been actively maintained for years.

Let's just remove it:

---8<---
Remove the public key part of the caam driver because it has been
unmaintained and there are serious bugs in it.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c
deleted file mode 100644
index cb001aa1de66..000000000000
--- a/drivers/crypto/caam/caampkc.c
+++ /dev/null
@@ -1,1230 +0,0 @@
-// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
-/*
- * caam - Freescale FSL CAAM support for Public Key Cryptography
- *
- * Copyright 2016 Freescale Semiconductor, Inc.
- * Copyright 2018-2019, 2023 NXP
- *
- * There is no Shared Descriptor for PKC so that the Job Descriptor must carry
- * all the desired key parameters, input and output pointers.
- */
-#include "compat.h"
-#include "regs.h"
-#include "intern.h"
-#include "jr.h"
-#include "error.h"
-#include "desc_constr.h"
-#include "sg_sw_sec4.h"
-#include "caampkc.h"
-#include <crypto/internal/engine.h>
-#include <linux/dma-mapping.h>
-#include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-
-#define DESC_RSA_PUB_LEN	(2 * CAAM_CMD_SZ + SIZEOF_RSA_PUB_PDB)
-#define DESC_RSA_PRIV_F1_LEN	(2 * CAAM_CMD_SZ + \
-				 SIZEOF_RSA_PRIV_F1_PDB)
-#define DESC_RSA_PRIV_F2_LEN	(2 * CAAM_CMD_SZ + \
-				 SIZEOF_RSA_PRIV_F2_PDB)
-#define DESC_RSA_PRIV_F3_LEN	(2 * CAAM_CMD_SZ + \
-				 SIZEOF_RSA_PRIV_F3_PDB)
-#define CAAM_RSA_MAX_INPUT_SIZE	512 /* for a 4096-bit modulus */
-
-/* buffer filled with zeros, used for padding */
-static u8 *zero_buffer;
-
-/*
- * variable used to avoid double free of resources in case
- * algorithm registration was unsuccessful
- */
-static bool init_done;
-
-struct caam_akcipher_alg {
-	struct akcipher_engine_alg akcipher;
-	bool registered;
-};
-
-static void rsa_io_unmap(struct device *dev, struct rsa_edesc *edesc,
-			 struct akcipher_request *req)
-{
-	struct caam_rsa_req_ctx *req_ctx = akcipher_request_ctx(req);
-
-	dma_unmap_sg(dev, req->dst, edesc->dst_nents, DMA_FROM_DEVICE);
-	dma_unmap_sg(dev, req_ctx->fixup_src, edesc->src_nents, DMA_TO_DEVICE);
-
-	if (edesc->sec4_sg_bytes)
-		dma_unmap_single(dev, edesc->sec4_sg_dma, edesc->sec4_sg_bytes,
-				 DMA_TO_DEVICE);
-}
-
-static void rsa_pub_unmap(struct device *dev, struct rsa_edesc *edesc,
-			  struct akcipher_request *req)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-	struct rsa_pub_pdb *pdb = &edesc->pdb.pub;
-
-	dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE);
-	dma_unmap_single(dev, pdb->e_dma, key->e_sz, DMA_TO_DEVICE);
-}
-
-static void rsa_priv_f1_unmap(struct device *dev, struct rsa_edesc *edesc,
-			      struct akcipher_request *req)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-	struct rsa_priv_f1_pdb *pdb = &edesc->pdb.priv_f1;
-
-	dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE);
-	dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE);
-}
-
-static void rsa_priv_f2_unmap(struct device *dev, struct rsa_edesc *edesc,
-			      struct akcipher_request *req)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-	struct rsa_priv_f2_pdb *pdb = &edesc->pdb.priv_f2;
-	size_t p_sz = key->p_sz;
-	size_t q_sz = key->q_sz;
-
-	dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE);
-	dma_unmap_single(dev, pdb->p_dma, p_sz, DMA_TO_DEVICE);
-	dma_unmap_single(dev, pdb->q_dma, q_sz, DMA_TO_DEVICE);
-	dma_unmap_single(dev, pdb->tmp1_dma, p_sz, DMA_BIDIRECTIONAL);
-	dma_unmap_single(dev, pdb->tmp2_dma, q_sz, DMA_BIDIRECTIONAL);
-}
-
-static void rsa_priv_f3_unmap(struct device *dev, struct rsa_edesc *edesc,
-			      struct akcipher_request *req)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-	struct rsa_priv_f3_pdb *pdb = &edesc->pdb.priv_f3;
-	size_t p_sz = key->p_sz;
-	size_t q_sz = key->q_sz;
-
-	dma_unmap_single(dev, pdb->p_dma, p_sz, DMA_TO_DEVICE);
-	dma_unmap_single(dev, pdb->q_dma, q_sz, DMA_TO_DEVICE);
-	dma_unmap_single(dev, pdb->dp_dma, p_sz, DMA_TO_DEVICE);
-	dma_unmap_single(dev, pdb->dq_dma, q_sz, DMA_TO_DEVICE);
-	dma_unmap_single(dev, pdb->c_dma, p_sz, DMA_TO_DEVICE);
-	dma_unmap_single(dev, pdb->tmp1_dma, p_sz, DMA_BIDIRECTIONAL);
-	dma_unmap_single(dev, pdb->tmp2_dma, q_sz, DMA_BIDIRECTIONAL);
-}
-
-/* RSA Job Completion handler */
-static void rsa_pub_done(struct device *dev, u32 *desc, u32 err, void *context)
-{
-	struct akcipher_request *req = context;
-	struct caam_rsa_req_ctx *req_ctx = akcipher_request_ctx(req);
-	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
-	struct rsa_edesc *edesc;
-	int ecode = 0;
-	bool has_bklog;
-
-	if (err)
-		ecode = caam_jr_strstatus(dev, err);
-
-	edesc = req_ctx->edesc;
-	has_bklog = edesc->bklog;
-
-	rsa_pub_unmap(dev, edesc, req);
-	rsa_io_unmap(dev, edesc, req);
-	kfree(edesc);
-
-	/*
-	 * If no backlog flag, the completion of the request is done
-	 * by CAAM, not crypto engine.
-	 */
-	if (!has_bklog)
-		akcipher_request_complete(req, ecode);
-	else
-		crypto_finalize_akcipher_request(jrp->engine, req, ecode);
-}
-
-static void rsa_priv_f_done(struct device *dev, u32 *desc, u32 err,
-			    void *context)
-{
-	struct akcipher_request *req = context;
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_drv_private_jr *jrp = dev_get_drvdata(dev);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-	struct caam_rsa_req_ctx *req_ctx = akcipher_request_ctx(req);
-	struct rsa_edesc *edesc;
-	int ecode = 0;
-	bool has_bklog;
-
-	if (err)
-		ecode = caam_jr_strstatus(dev, err);
-
-	edesc = req_ctx->edesc;
-	has_bklog = edesc->bklog;
-
-	switch (key->priv_form) {
-	case FORM1:
-		rsa_priv_f1_unmap(dev, edesc, req);
-		break;
-	case FORM2:
-		rsa_priv_f2_unmap(dev, edesc, req);
-		break;
-	case FORM3:
-		rsa_priv_f3_unmap(dev, edesc, req);
-	}
-
-	rsa_io_unmap(dev, edesc, req);
-	kfree(edesc);
-
-	/*
-	 * If no backlog flag, the completion of the request is done
-	 * by CAAM, not crypto engine.
-	 */
-	if (!has_bklog)
-		akcipher_request_complete(req, ecode);
-	else
-		crypto_finalize_akcipher_request(jrp->engine, req, ecode);
-}
-
-/**
- * caam_rsa_count_leading_zeros - Count leading zeros, need it to strip,
- *                                from a given scatterlist
- *
- * @sgl   : scatterlist to count zeros from
- * @nbytes: number of zeros, in bytes, to strip
- * @flags : operation flags
- */
-static int caam_rsa_count_leading_zeros(struct scatterlist *sgl,
-					unsigned int nbytes,
-					unsigned int flags)
-{
-	struct sg_mapping_iter miter;
-	int lzeros, ents;
-	unsigned int len;
-	unsigned int tbytes = nbytes;
-	const u8 *buff;
-
-	ents = sg_nents_for_len(sgl, nbytes);
-	if (ents < 0)
-		return ents;
-
-	sg_miter_start(&miter, sgl, ents, SG_MITER_FROM_SG | flags);
-
-	lzeros = 0;
-	len = 0;
-	while (nbytes > 0) {
-		/* do not strip more than given bytes */
-		while (len && !*buff && lzeros < nbytes) {
-			lzeros++;
-			len--;
-			buff++;
-		}
-
-		if (len && *buff)
-			break;
-
-		if (!sg_miter_next(&miter))
-			break;
-
-		buff = miter.addr;
-		len = miter.length;
-
-		nbytes -= lzeros;
-		lzeros = 0;
-	}
-
-	miter.consumed = lzeros;
-	sg_miter_stop(&miter);
-	nbytes -= lzeros;
-
-	return tbytes - nbytes;
-}
-
-static struct rsa_edesc *rsa_edesc_alloc(struct akcipher_request *req,
-					 size_t desclen)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct device *dev = ctx->dev;
-	struct caam_rsa_req_ctx *req_ctx = akcipher_request_ctx(req);
-	struct caam_rsa_key *key = &ctx->key;
-	struct rsa_edesc *edesc;
-	gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
-		       GFP_KERNEL : GFP_ATOMIC;
-	int sg_flags = (flags == GFP_ATOMIC) ? SG_MITER_ATOMIC : 0;
-	int sec4_sg_index, sec4_sg_len = 0, sec4_sg_bytes;
-	int src_nents, dst_nents;
-	int mapped_src_nents, mapped_dst_nents;
-	unsigned int diff_size = 0;
-	int lzeros;
-
-	if (req->src_len > key->n_sz) {
-		/*
-		 * strip leading zeros and
-		 * return the number of zeros to skip
-		 */
-		lzeros = caam_rsa_count_leading_zeros(req->src, req->src_len -
-						      key->n_sz, sg_flags);
-		if (lzeros < 0)
-			return ERR_PTR(lzeros);
-
-		req_ctx->fixup_src = scatterwalk_ffwd(req_ctx->src, req->src,
-						      lzeros);
-		req_ctx->fixup_src_len = req->src_len - lzeros;
-	} else {
-		/*
-		 * input src is less then n key modulus,
-		 * so there will be zero padding
-		 */
-		diff_size = key->n_sz - req->src_len;
-		req_ctx->fixup_src = req->src;
-		req_ctx->fixup_src_len = req->src_len;
-	}
-
-	src_nents = sg_nents_for_len(req_ctx->fixup_src,
-				     req_ctx->fixup_src_len);
-	dst_nents = sg_nents_for_len(req->dst, req->dst_len);
-
-	mapped_src_nents = dma_map_sg(dev, req_ctx->fixup_src, src_nents,
-				      DMA_TO_DEVICE);
-	if (unlikely(!mapped_src_nents)) {
-		dev_err(dev, "unable to map source\n");
-		return ERR_PTR(-ENOMEM);
-	}
-	mapped_dst_nents = dma_map_sg(dev, req->dst, dst_nents,
-				      DMA_FROM_DEVICE);
-	if (unlikely(!mapped_dst_nents)) {
-		dev_err(dev, "unable to map destination\n");
-		goto src_fail;
-	}
-
-	if (!diff_size && mapped_src_nents == 1)
-		sec4_sg_len = 0; /* no need for an input hw s/g table */
-	else
-		sec4_sg_len = mapped_src_nents + !!diff_size;
-	sec4_sg_index = sec4_sg_len;
-
-	if (mapped_dst_nents > 1)
-		sec4_sg_len += pad_sg_nents(mapped_dst_nents);
-	else
-		sec4_sg_len = pad_sg_nents(sec4_sg_len);
-
-	sec4_sg_bytes = sec4_sg_len * sizeof(struct sec4_sg_entry);
-
-	/* allocate space for base edesc, hw desc commands and link tables */
-	edesc = kzalloc(sizeof(*edesc) + desclen + sec4_sg_bytes, flags);
-	if (!edesc)
-		goto dst_fail;
-
-	edesc->sec4_sg = (void *)edesc + sizeof(*edesc) + desclen;
-	if (diff_size)
-		dma_to_sec4_sg_one(edesc->sec4_sg, ctx->padding_dma, diff_size,
-				   0);
-
-	if (sec4_sg_index)
-		sg_to_sec4_sg_last(req_ctx->fixup_src, req_ctx->fixup_src_len,
-				   edesc->sec4_sg + !!diff_size, 0);
-
-	if (mapped_dst_nents > 1)
-		sg_to_sec4_sg_last(req->dst, req->dst_len,
-				   edesc->sec4_sg + sec4_sg_index, 0);
-
-	/* Save nents for later use in Job Descriptor */
-	edesc->src_nents = src_nents;
-	edesc->dst_nents = dst_nents;
-
-	req_ctx->edesc = edesc;
-
-	if (!sec4_sg_bytes)
-		return edesc;
-
-	edesc->mapped_src_nents = mapped_src_nents;
-	edesc->mapped_dst_nents = mapped_dst_nents;
-
-	edesc->sec4_sg_dma = dma_map_single(dev, edesc->sec4_sg,
-					    sec4_sg_bytes, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, edesc->sec4_sg_dma)) {
-		dev_err(dev, "unable to map S/G table\n");
-		goto sec4_sg_fail;
-	}
-
-	edesc->sec4_sg_bytes = sec4_sg_bytes;
-
-	print_hex_dump_debug("caampkc sec4_sg@" __stringify(__LINE__) ": ",
-			     DUMP_PREFIX_ADDRESS, 16, 4, edesc->sec4_sg,
-			     edesc->sec4_sg_bytes, 1);
-
-	return edesc;
-
-sec4_sg_fail:
-	kfree(edesc);
-dst_fail:
-	dma_unmap_sg(dev, req->dst, dst_nents, DMA_FROM_DEVICE);
-src_fail:
-	dma_unmap_sg(dev, req_ctx->fixup_src, src_nents, DMA_TO_DEVICE);
-	return ERR_PTR(-ENOMEM);
-}
-
-static int akcipher_do_one_req(struct crypto_engine *engine, void *areq)
-{
-	struct akcipher_request *req = container_of(areq,
-						    struct akcipher_request,
-						    base);
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_req_ctx *req_ctx = akcipher_request_ctx(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct device *jrdev = ctx->dev;
-	u32 *desc = req_ctx->edesc->hw_desc;
-	int ret;
-
-	req_ctx->edesc->bklog = true;
-
-	ret = caam_jr_enqueue(jrdev, desc, req_ctx->akcipher_op_done, req);
-
-	if (ret == -ENOSPC && engine->retry_support)
-		return ret;
-
-	if (ret != -EINPROGRESS) {
-		rsa_pub_unmap(jrdev, req_ctx->edesc, req);
-		rsa_io_unmap(jrdev, req_ctx->edesc, req);
-		kfree(req_ctx->edesc);
-	} else {
-		ret = 0;
-	}
-
-	return ret;
-}
-
-static int set_rsa_pub_pdb(struct akcipher_request *req,
-			   struct rsa_edesc *edesc)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_req_ctx *req_ctx = akcipher_request_ctx(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-	struct device *dev = ctx->dev;
-	struct rsa_pub_pdb *pdb = &edesc->pdb.pub;
-	int sec4_sg_index = 0;
-
-	pdb->n_dma = dma_map_single(dev, key->n, key->n_sz, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, pdb->n_dma)) {
-		dev_err(dev, "Unable to map RSA modulus memory\n");
-		return -ENOMEM;
-	}
-
-	pdb->e_dma = dma_map_single(dev, key->e, key->e_sz, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, pdb->e_dma)) {
-		dev_err(dev, "Unable to map RSA public exponent memory\n");
-		dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE);
-		return -ENOMEM;
-	}
-
-	if (edesc->mapped_src_nents > 1) {
-		pdb->sgf |= RSA_PDB_SGF_F;
-		pdb->f_dma = edesc->sec4_sg_dma;
-		sec4_sg_index += edesc->mapped_src_nents;
-	} else {
-		pdb->f_dma = sg_dma_address(req_ctx->fixup_src);
-	}
-
-	if (edesc->mapped_dst_nents > 1) {
-		pdb->sgf |= RSA_PDB_SGF_G;
-		pdb->g_dma = edesc->sec4_sg_dma +
-			     sec4_sg_index * sizeof(struct sec4_sg_entry);
-	} else {
-		pdb->g_dma = sg_dma_address(req->dst);
-	}
-
-	pdb->sgf |= (key->e_sz << RSA_PDB_E_SHIFT) | key->n_sz;
-	pdb->f_len = req_ctx->fixup_src_len;
-
-	return 0;
-}
-
-static int set_rsa_priv_f1_pdb(struct akcipher_request *req,
-			       struct rsa_edesc *edesc)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-	struct device *dev = ctx->dev;
-	struct rsa_priv_f1_pdb *pdb = &edesc->pdb.priv_f1;
-	int sec4_sg_index = 0;
-
-	pdb->n_dma = dma_map_single(dev, key->n, key->n_sz, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, pdb->n_dma)) {
-		dev_err(dev, "Unable to map modulus memory\n");
-		return -ENOMEM;
-	}
-
-	pdb->d_dma = dma_map_single(dev, key->d, key->d_sz, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, pdb->d_dma)) {
-		dev_err(dev, "Unable to map RSA private exponent memory\n");
-		dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE);
-		return -ENOMEM;
-	}
-
-	if (edesc->mapped_src_nents > 1) {
-		pdb->sgf |= RSA_PRIV_PDB_SGF_G;
-		pdb->g_dma = edesc->sec4_sg_dma;
-		sec4_sg_index += edesc->mapped_src_nents;
-
-	} else {
-		struct caam_rsa_req_ctx *req_ctx = akcipher_request_ctx(req);
-
-		pdb->g_dma = sg_dma_address(req_ctx->fixup_src);
-	}
-
-	if (edesc->mapped_dst_nents > 1) {
-		pdb->sgf |= RSA_PRIV_PDB_SGF_F;
-		pdb->f_dma = edesc->sec4_sg_dma +
-			     sec4_sg_index * sizeof(struct sec4_sg_entry);
-	} else {
-		pdb->f_dma = sg_dma_address(req->dst);
-	}
-
-	pdb->sgf |= (key->d_sz << RSA_PDB_D_SHIFT) | key->n_sz;
-
-	return 0;
-}
-
-static int set_rsa_priv_f2_pdb(struct akcipher_request *req,
-			       struct rsa_edesc *edesc)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-	struct device *dev = ctx->dev;
-	struct rsa_priv_f2_pdb *pdb = &edesc->pdb.priv_f2;
-	int sec4_sg_index = 0;
-	size_t p_sz = key->p_sz;
-	size_t q_sz = key->q_sz;
-
-	pdb->d_dma = dma_map_single(dev, key->d, key->d_sz, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, pdb->d_dma)) {
-		dev_err(dev, "Unable to map RSA private exponent memory\n");
-		return -ENOMEM;
-	}
-
-	pdb->p_dma = dma_map_single(dev, key->p, p_sz, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, pdb->p_dma)) {
-		dev_err(dev, "Unable to map RSA prime factor p memory\n");
-		goto unmap_d;
-	}
-
-	pdb->q_dma = dma_map_single(dev, key->q, q_sz, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, pdb->q_dma)) {
-		dev_err(dev, "Unable to map RSA prime factor q memory\n");
-		goto unmap_p;
-	}
-
-	pdb->tmp1_dma = dma_map_single(dev, key->tmp1, p_sz, DMA_BIDIRECTIONAL);
-	if (dma_mapping_error(dev, pdb->tmp1_dma)) {
-		dev_err(dev, "Unable to map RSA tmp1 memory\n");
-		goto unmap_q;
-	}
-
-	pdb->tmp2_dma = dma_map_single(dev, key->tmp2, q_sz, DMA_BIDIRECTIONAL);
-	if (dma_mapping_error(dev, pdb->tmp2_dma)) {
-		dev_err(dev, "Unable to map RSA tmp2 memory\n");
-		goto unmap_tmp1;
-	}
-
-	if (edesc->mapped_src_nents > 1) {
-		pdb->sgf |= RSA_PRIV_PDB_SGF_G;
-		pdb->g_dma = edesc->sec4_sg_dma;
-		sec4_sg_index += edesc->mapped_src_nents;
-	} else {
-		struct caam_rsa_req_ctx *req_ctx = akcipher_request_ctx(req);
-
-		pdb->g_dma = sg_dma_address(req_ctx->fixup_src);
-	}
-
-	if (edesc->mapped_dst_nents > 1) {
-		pdb->sgf |= RSA_PRIV_PDB_SGF_F;
-		pdb->f_dma = edesc->sec4_sg_dma +
-			     sec4_sg_index * sizeof(struct sec4_sg_entry);
-	} else {
-		pdb->f_dma = sg_dma_address(req->dst);
-	}
-
-	pdb->sgf |= (key->d_sz << RSA_PDB_D_SHIFT) | key->n_sz;
-	pdb->p_q_len = (q_sz << RSA_PDB_Q_SHIFT) | p_sz;
-
-	return 0;
-
-unmap_tmp1:
-	dma_unmap_single(dev, pdb->tmp1_dma, p_sz, DMA_BIDIRECTIONAL);
-unmap_q:
-	dma_unmap_single(dev, pdb->q_dma, q_sz, DMA_TO_DEVICE);
-unmap_p:
-	dma_unmap_single(dev, pdb->p_dma, p_sz, DMA_TO_DEVICE);
-unmap_d:
-	dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE);
-
-	return -ENOMEM;
-}
-
-static int set_rsa_priv_f3_pdb(struct akcipher_request *req,
-			       struct rsa_edesc *edesc)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-	struct device *dev = ctx->dev;
-	struct rsa_priv_f3_pdb *pdb = &edesc->pdb.priv_f3;
-	int sec4_sg_index = 0;
-	size_t p_sz = key->p_sz;
-	size_t q_sz = key->q_sz;
-
-	pdb->p_dma = dma_map_single(dev, key->p, p_sz, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, pdb->p_dma)) {
-		dev_err(dev, "Unable to map RSA prime factor p memory\n");
-		return -ENOMEM;
-	}
-
-	pdb->q_dma = dma_map_single(dev, key->q, q_sz, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, pdb->q_dma)) {
-		dev_err(dev, "Unable to map RSA prime factor q memory\n");
-		goto unmap_p;
-	}
-
-	pdb->dp_dma = dma_map_single(dev, key->dp, p_sz, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, pdb->dp_dma)) {
-		dev_err(dev, "Unable to map RSA exponent dp memory\n");
-		goto unmap_q;
-	}
-
-	pdb->dq_dma = dma_map_single(dev, key->dq, q_sz, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, pdb->dq_dma)) {
-		dev_err(dev, "Unable to map RSA exponent dq memory\n");
-		goto unmap_dp;
-	}
-
-	pdb->c_dma = dma_map_single(dev, key->qinv, p_sz, DMA_TO_DEVICE);
-	if (dma_mapping_error(dev, pdb->c_dma)) {
-		dev_err(dev, "Unable to map RSA CRT coefficient qinv memory\n");
-		goto unmap_dq;
-	}
-
-	pdb->tmp1_dma = dma_map_single(dev, key->tmp1, p_sz, DMA_BIDIRECTIONAL);
-	if (dma_mapping_error(dev, pdb->tmp1_dma)) {
-		dev_err(dev, "Unable to map RSA tmp1 memory\n");
-		goto unmap_qinv;
-	}
-
-	pdb->tmp2_dma = dma_map_single(dev, key->tmp2, q_sz, DMA_BIDIRECTIONAL);
-	if (dma_mapping_error(dev, pdb->tmp2_dma)) {
-		dev_err(dev, "Unable to map RSA tmp2 memory\n");
-		goto unmap_tmp1;
-	}
-
-	if (edesc->mapped_src_nents > 1) {
-		pdb->sgf |= RSA_PRIV_PDB_SGF_G;
-		pdb->g_dma = edesc->sec4_sg_dma;
-		sec4_sg_index += edesc->mapped_src_nents;
-	} else {
-		struct caam_rsa_req_ctx *req_ctx = akcipher_request_ctx(req);
-
-		pdb->g_dma = sg_dma_address(req_ctx->fixup_src);
-	}
-
-	if (edesc->mapped_dst_nents > 1) {
-		pdb->sgf |= RSA_PRIV_PDB_SGF_F;
-		pdb->f_dma = edesc->sec4_sg_dma +
-			     sec4_sg_index * sizeof(struct sec4_sg_entry);
-	} else {
-		pdb->f_dma = sg_dma_address(req->dst);
-	}
-
-	pdb->sgf |= key->n_sz;
-	pdb->p_q_len = (q_sz << RSA_PDB_Q_SHIFT) | p_sz;
-
-	return 0;
-
-unmap_tmp1:
-	dma_unmap_single(dev, pdb->tmp1_dma, p_sz, DMA_BIDIRECTIONAL);
-unmap_qinv:
-	dma_unmap_single(dev, pdb->c_dma, p_sz, DMA_TO_DEVICE);
-unmap_dq:
-	dma_unmap_single(dev, pdb->dq_dma, q_sz, DMA_TO_DEVICE);
-unmap_dp:
-	dma_unmap_single(dev, pdb->dp_dma, p_sz, DMA_TO_DEVICE);
-unmap_q:
-	dma_unmap_single(dev, pdb->q_dma, q_sz, DMA_TO_DEVICE);
-unmap_p:
-	dma_unmap_single(dev, pdb->p_dma, p_sz, DMA_TO_DEVICE);
-
-	return -ENOMEM;
-}
-
-static int akcipher_enqueue_req(struct device *jrdev,
-				void (*cbk)(struct device *jrdev, u32 *desc,
-					    u32 err, void *context),
-				struct akcipher_request *req)
-{
-	struct caam_drv_private_jr *jrpriv = dev_get_drvdata(jrdev);
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-	struct caam_rsa_req_ctx *req_ctx = akcipher_request_ctx(req);
-	struct rsa_edesc *edesc = req_ctx->edesc;
-	u32 *desc = edesc->hw_desc;
-	int ret;
-
-	req_ctx->akcipher_op_done = cbk;
-	/*
-	 * Only the backlog request are sent to crypto-engine since the others
-	 * can be handled by CAAM, if free, especially since JR has up to 1024
-	 * entries (more than the 10 entries from crypto-engine).
-	 */
-	if (req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)
-		ret = crypto_transfer_akcipher_request_to_engine(jrpriv->engine,
-								 req);
-	else
-		ret = caam_jr_enqueue(jrdev, desc, cbk, req);
-
-	if ((ret != -EINPROGRESS) && (ret != -EBUSY)) {
-		switch (key->priv_form) {
-		case FORM1:
-			rsa_priv_f1_unmap(jrdev, edesc, req);
-			break;
-		case FORM2:
-			rsa_priv_f2_unmap(jrdev, edesc, req);
-			break;
-		case FORM3:
-			rsa_priv_f3_unmap(jrdev, edesc, req);
-			break;
-		default:
-			rsa_pub_unmap(jrdev, edesc, req);
-		}
-		rsa_io_unmap(jrdev, edesc, req);
-		kfree(edesc);
-	}
-
-	return ret;
-}
-
-static int caam_rsa_enc(struct akcipher_request *req)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-	struct device *jrdev = ctx->dev;
-	struct rsa_edesc *edesc;
-	int ret;
-
-	if (unlikely(!key->n || !key->e))
-		return -EINVAL;
-
-	if (req->dst_len < key->n_sz) {
-		req->dst_len = key->n_sz;
-		dev_err(jrdev, "Output buffer length less than parameter n\n");
-		return -EOVERFLOW;
-	}
-
-	/* Allocate extended descriptor */
-	edesc = rsa_edesc_alloc(req, DESC_RSA_PUB_LEN);
-	if (IS_ERR(edesc))
-		return PTR_ERR(edesc);
-
-	/* Set RSA Encrypt Protocol Data Block */
-	ret = set_rsa_pub_pdb(req, edesc);
-	if (ret)
-		goto init_fail;
-
-	/* Initialize Job Descriptor */
-	init_rsa_pub_desc(edesc->hw_desc, &edesc->pdb.pub);
-
-	return akcipher_enqueue_req(jrdev, rsa_pub_done, req);
-
-init_fail:
-	rsa_io_unmap(jrdev, edesc, req);
-	kfree(edesc);
-	return ret;
-}
-
-static int caam_rsa_dec_priv_f1(struct akcipher_request *req)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct device *jrdev = ctx->dev;
-	struct rsa_edesc *edesc;
-	int ret;
-
-	/* Allocate extended descriptor */
-	edesc = rsa_edesc_alloc(req, DESC_RSA_PRIV_F1_LEN);
-	if (IS_ERR(edesc))
-		return PTR_ERR(edesc);
-
-	/* Set RSA Decrypt Protocol Data Block - Private Key Form #1 */
-	ret = set_rsa_priv_f1_pdb(req, edesc);
-	if (ret)
-		goto init_fail;
-
-	/* Initialize Job Descriptor */
-	init_rsa_priv_f1_desc(edesc->hw_desc, &edesc->pdb.priv_f1);
-
-	return akcipher_enqueue_req(jrdev, rsa_priv_f_done, req);
-
-init_fail:
-	rsa_io_unmap(jrdev, edesc, req);
-	kfree(edesc);
-	return ret;
-}
-
-static int caam_rsa_dec_priv_f2(struct akcipher_request *req)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct device *jrdev = ctx->dev;
-	struct rsa_edesc *edesc;
-	int ret;
-
-	/* Allocate extended descriptor */
-	edesc = rsa_edesc_alloc(req, DESC_RSA_PRIV_F2_LEN);
-	if (IS_ERR(edesc))
-		return PTR_ERR(edesc);
-
-	/* Set RSA Decrypt Protocol Data Block - Private Key Form #2 */
-	ret = set_rsa_priv_f2_pdb(req, edesc);
-	if (ret)
-		goto init_fail;
-
-	/* Initialize Job Descriptor */
-	init_rsa_priv_f2_desc(edesc->hw_desc, &edesc->pdb.priv_f2);
-
-	return akcipher_enqueue_req(jrdev, rsa_priv_f_done, req);
-
-init_fail:
-	rsa_io_unmap(jrdev, edesc, req);
-	kfree(edesc);
-	return ret;
-}
-
-static int caam_rsa_dec_priv_f3(struct akcipher_request *req)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct device *jrdev = ctx->dev;
-	struct rsa_edesc *edesc;
-	int ret;
-
-	/* Allocate extended descriptor */
-	edesc = rsa_edesc_alloc(req, DESC_RSA_PRIV_F3_LEN);
-	if (IS_ERR(edesc))
-		return PTR_ERR(edesc);
-
-	/* Set RSA Decrypt Protocol Data Block - Private Key Form #3 */
-	ret = set_rsa_priv_f3_pdb(req, edesc);
-	if (ret)
-		goto init_fail;
-
-	/* Initialize Job Descriptor */
-	init_rsa_priv_f3_desc(edesc->hw_desc, &edesc->pdb.priv_f3);
-
-	return akcipher_enqueue_req(jrdev, rsa_priv_f_done, req);
-
-init_fail:
-	rsa_io_unmap(jrdev, edesc, req);
-	kfree(edesc);
-	return ret;
-}
-
-static int caam_rsa_dec(struct akcipher_request *req)
-{
-	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-	int ret;
-
-	if (unlikely(!key->n || !key->d))
-		return -EINVAL;
-
-	if (req->dst_len < key->n_sz) {
-		req->dst_len = key->n_sz;
-		dev_err(ctx->dev, "Output buffer length less than parameter n\n");
-		return -EOVERFLOW;
-	}
-
-	if (key->priv_form == FORM3)
-		ret = caam_rsa_dec_priv_f3(req);
-	else if (key->priv_form == FORM2)
-		ret = caam_rsa_dec_priv_f2(req);
-	else
-		ret = caam_rsa_dec_priv_f1(req);
-
-	return ret;
-}
-
-static void caam_rsa_free_key(struct caam_rsa_key *key)
-{
-	kfree_sensitive(key->d);
-	kfree_sensitive(key->p);
-	kfree_sensitive(key->q);
-	kfree_sensitive(key->dp);
-	kfree_sensitive(key->dq);
-	kfree_sensitive(key->qinv);
-	kfree_sensitive(key->tmp1);
-	kfree_sensitive(key->tmp2);
-	kfree(key->e);
-	kfree(key->n);
-	memset(key, 0, sizeof(*key));
-}
-
-static void caam_rsa_drop_leading_zeros(const u8 **ptr, size_t *nbytes)
-{
-	while (!**ptr && *nbytes) {
-		(*ptr)++;
-		(*nbytes)--;
-	}
-}
-
-/**
- * caam_read_rsa_crt - Used for reading dP, dQ, qInv CRT members.
- * dP, dQ and qInv could decode to less than corresponding p, q length, as the
- * BER-encoding requires that the minimum number of bytes be used to encode the
- * integer. dP, dQ, qInv decoded values have to be zero-padded to appropriate
- * length.
- *
- * @ptr   : pointer to {dP, dQ, qInv} CRT member
- * @nbytes: length in bytes of {dP, dQ, qInv} CRT member
- * @dstlen: length in bytes of corresponding p or q prime factor
- */
-static u8 *caam_read_rsa_crt(const u8 *ptr, size_t nbytes, size_t dstlen)
-{
-	u8 *dst;
-
-	caam_rsa_drop_leading_zeros(&ptr, &nbytes);
-	if (!nbytes)
-		return NULL;
-
-	dst = kzalloc(dstlen, GFP_KERNEL);
-	if (!dst)
-		return NULL;
-
-	memcpy(dst + (dstlen - nbytes), ptr, nbytes);
-
-	return dst;
-}
-
-/**
- * caam_read_raw_data - Read a raw byte stream as a positive integer.
- * The function skips buffer's leading zeros, copies the remained data
- * to a buffer allocated in the GFP_KERNEL zone and returns
- * the address of the new buffer.
- *
- * @buf   : The data to read
- * @nbytes: The amount of data to read
- */
-static inline u8 *caam_read_raw_data(const u8 *buf, size_t *nbytes)
-{
-
-	caam_rsa_drop_leading_zeros(&buf, nbytes);
-	if (!*nbytes)
-		return NULL;
-
-	return kmemdup(buf, *nbytes, GFP_KERNEL);
-}
-
-static int caam_rsa_check_key_length(unsigned int len)
-{
-	if (len > 4096)
-		return -EINVAL;
-	return 0;
-}
-
-static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
-				unsigned int keylen)
-{
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct rsa_key raw_key = {NULL};
-	struct caam_rsa_key *rsa_key = &ctx->key;
-	int ret;
-
-	/* Free the old RSA key if any */
-	caam_rsa_free_key(rsa_key);
-
-	ret = rsa_parse_pub_key(&raw_key, key, keylen);
-	if (ret)
-		return ret;
-
-	/* Copy key in DMA zone */
-	rsa_key->e = kmemdup(raw_key.e, raw_key.e_sz, GFP_KERNEL);
-	if (!rsa_key->e)
-		goto err;
-
-	/*
-	 * Skip leading zeros and copy the positive integer to a buffer
-	 * allocated in the GFP_KERNEL zone. The decryption descriptor
-	 * expects a positive integer for the RSA modulus and uses its length as
-	 * decryption output length.
-	 */
-	rsa_key->n = caam_read_raw_data(raw_key.n, &raw_key.n_sz);
-	if (!rsa_key->n)
-		goto err;
-
-	if (caam_rsa_check_key_length(raw_key.n_sz << 3)) {
-		caam_rsa_free_key(rsa_key);
-		return -EINVAL;
-	}
-
-	rsa_key->e_sz = raw_key.e_sz;
-	rsa_key->n_sz = raw_key.n_sz;
-
-	return 0;
-err:
-	caam_rsa_free_key(rsa_key);
-	return -ENOMEM;
-}
-
-static int caam_rsa_set_priv_key_form(struct caam_rsa_ctx *ctx,
-				       struct rsa_key *raw_key)
-{
-	struct caam_rsa_key *rsa_key = &ctx->key;
-	size_t p_sz = raw_key->p_sz;
-	size_t q_sz = raw_key->q_sz;
-	unsigned aligned_size;
-
-	rsa_key->p = caam_read_raw_data(raw_key->p, &p_sz);
-	if (!rsa_key->p)
-		return -ENOMEM;
-	rsa_key->p_sz = p_sz;
-
-	rsa_key->q = caam_read_raw_data(raw_key->q, &q_sz);
-	if (!rsa_key->q)
-		goto free_p;
-	rsa_key->q_sz = q_sz;
-
-	aligned_size = ALIGN(raw_key->p_sz, dma_get_cache_alignment());
-	rsa_key->tmp1 = kzalloc(aligned_size, GFP_KERNEL);
-	if (!rsa_key->tmp1)
-		goto free_q;
-
-	aligned_size = ALIGN(raw_key->q_sz, dma_get_cache_alignment());
-	rsa_key->tmp2 = kzalloc(aligned_size, GFP_KERNEL);
-	if (!rsa_key->tmp2)
-		goto free_tmp1;
-
-	rsa_key->priv_form = FORM2;
-
-	rsa_key->dp = caam_read_rsa_crt(raw_key->dp, raw_key->dp_sz, p_sz);
-	if (!rsa_key->dp)
-		goto free_tmp2;
-
-	rsa_key->dq = caam_read_rsa_crt(raw_key->dq, raw_key->dq_sz, q_sz);
-	if (!rsa_key->dq)
-		goto free_dp;
-
-	rsa_key->qinv = caam_read_rsa_crt(raw_key->qinv, raw_key->qinv_sz,
-					  q_sz);
-	if (!rsa_key->qinv)
-		goto free_dq;
-
-	rsa_key->priv_form = FORM3;
-
-	return 0;
-
-free_dq:
-	kfree_sensitive(rsa_key->dq);
-free_dp:
-	kfree_sensitive(rsa_key->dp);
-free_tmp2:
-	kfree_sensitive(rsa_key->tmp2);
-free_tmp1:
-	kfree_sensitive(rsa_key->tmp1);
-free_q:
-	kfree_sensitive(rsa_key->q);
-free_p:
-	kfree_sensitive(rsa_key->p);
-	return -ENOMEM;
-}
-
-static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
-				 unsigned int keylen)
-{
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct rsa_key raw_key = {NULL};
-	struct caam_rsa_key *rsa_key = &ctx->key;
-	int ret;
-
-	/* Free the old RSA key if any */
-	caam_rsa_free_key(rsa_key);
-
-	ret = rsa_parse_priv_key(&raw_key, key, keylen);
-	if (ret)
-		return ret;
-
-	/* Copy key in DMA zone */
-	rsa_key->d = kmemdup(raw_key.d, raw_key.d_sz, GFP_KERNEL);
-	if (!rsa_key->d)
-		goto err;
-
-	rsa_key->e = kmemdup(raw_key.e, raw_key.e_sz, GFP_KERNEL);
-	if (!rsa_key->e)
-		goto err;
-
-	/*
-	 * Skip leading zeros and copy the positive integer to a buffer
-	 * allocated in the GFP_KERNEL zone. The decryption descriptor
-	 * expects a positive integer for the RSA modulus and uses its length as
-	 * decryption output length.
-	 */
-	rsa_key->n = caam_read_raw_data(raw_key.n, &raw_key.n_sz);
-	if (!rsa_key->n)
-		goto err;
-
-	if (caam_rsa_check_key_length(raw_key.n_sz << 3)) {
-		caam_rsa_free_key(rsa_key);
-		return -EINVAL;
-	}
-
-	rsa_key->d_sz = raw_key.d_sz;
-	rsa_key->e_sz = raw_key.e_sz;
-	rsa_key->n_sz = raw_key.n_sz;
-
-	ret = caam_rsa_set_priv_key_form(ctx, &raw_key);
-	if (ret)
-		goto err;
-
-	return 0;
-
-err:
-	caam_rsa_free_key(rsa_key);
-	return -ENOMEM;
-}
-
-static unsigned int caam_rsa_max_size(struct crypto_akcipher *tfm)
-{
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-
-	return ctx->key.n_sz;
-}
-
-/* Per session pkc's driver context creation function */
-static int caam_rsa_init_tfm(struct crypto_akcipher *tfm)
-{
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-
-	akcipher_set_reqsize(tfm, sizeof(struct caam_rsa_req_ctx));
-
-	ctx->dev = caam_jr_alloc();
-
-	if (IS_ERR(ctx->dev)) {
-		pr_err("Job Ring Device allocation for transform failed\n");
-		return PTR_ERR(ctx->dev);
-	}
-
-	ctx->padding_dma = dma_map_single(ctx->dev, zero_buffer,
-					  CAAM_RSA_MAX_INPUT_SIZE - 1,
-					  DMA_TO_DEVICE);
-	if (dma_mapping_error(ctx->dev, ctx->padding_dma)) {
-		dev_err(ctx->dev, "unable to map padding\n");
-		caam_jr_free(ctx->dev);
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-/* Per session pkc's driver context cleanup function */
-static void caam_rsa_exit_tfm(struct crypto_akcipher *tfm)
-{
-	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx_dma(tfm);
-	struct caam_rsa_key *key = &ctx->key;
-
-	dma_unmap_single(ctx->dev, ctx->padding_dma, CAAM_RSA_MAX_INPUT_SIZE -
-			 1, DMA_TO_DEVICE);
-	caam_rsa_free_key(key);
-	caam_jr_free(ctx->dev);
-}
-
-static struct caam_akcipher_alg caam_rsa = {
-	.akcipher.base = {
-		.encrypt = caam_rsa_enc,
-		.decrypt = caam_rsa_dec,
-		.set_pub_key = caam_rsa_set_pub_key,
-		.set_priv_key = caam_rsa_set_priv_key,
-		.max_size = caam_rsa_max_size,
-		.init = caam_rsa_init_tfm,
-		.exit = caam_rsa_exit_tfm,
-		.base = {
-			.cra_name = "rsa",
-			.cra_driver_name = "rsa-caam",
-			.cra_priority = 3000,
-			.cra_module = THIS_MODULE,
-			.cra_ctxsize = sizeof(struct caam_rsa_ctx) +
-				       CRYPTO_DMA_PADDING,
-		},
-	},
-	.akcipher.op = {
-		.do_one_request = akcipher_do_one_req,
-	},
-};
-
-/* Public Key Cryptography module initialization handler */
-int caam_pkc_init(struct device *ctrldev)
-{
-	struct caam_drv_private *priv = dev_get_drvdata(ctrldev);
-	u32 pk_inst, pkha;
-	int err;
-	init_done = false;
-
-	/* Determine public key hardware accelerator presence. */
-	if (priv->era < 10) {
-		pk_inst = (rd_reg32(&priv->jr[0]->perfmon.cha_num_ls) &
-			   CHA_ID_LS_PK_MASK) >> CHA_ID_LS_PK_SHIFT;
-	} else {
-		pkha = rd_reg32(&priv->jr[0]->vreg.pkha);
-		pk_inst = pkha & CHA_VER_NUM_MASK;
-
-		/*
-		 * Newer CAAMs support partially disabled functionality. If this is the
-		 * case, the number is non-zero, but this bit is set to indicate that
-		 * no encryption or decryption is supported. Only signing and verifying
-		 * is supported.
-		 */
-		if (pkha & CHA_VER_MISC_PKHA_NO_CRYPT)
-			pk_inst = 0;
-	}
-
-	/* Do not register algorithms if PKHA is not present. */
-	if (!pk_inst)
-		return 0;
-
-	/* allocate zero buffer, used for padding input */
-	zero_buffer = kzalloc(CAAM_RSA_MAX_INPUT_SIZE - 1, GFP_KERNEL);
-	if (!zero_buffer)
-		return -ENOMEM;
-
-	err = crypto_engine_register_akcipher(&caam_rsa.akcipher);
-
-	if (err) {
-		kfree(zero_buffer);
-		dev_warn(ctrldev, "%s alg registration failed\n",
-			 caam_rsa.akcipher.base.base.cra_driver_name);
-	} else {
-		init_done = true;
-		caam_rsa.registered = true;
-		dev_info(ctrldev, "caam pkc algorithms registered in /proc/crypto\n");
-	}
-
-	return err;
-}
-
-void caam_pkc_exit(void)
-{
-	if (!init_done)
-		return;
-
-	if (caam_rsa.registered)
-		crypto_engine_unregister_akcipher(&caam_rsa.akcipher);
-
-	kfree(zero_buffer);
-}
diff --git a/drivers/crypto/caam/caampkc.h b/drivers/crypto/caam/caampkc.h
deleted file mode 100644
index 96d03704c9be..000000000000
--- a/drivers/crypto/caam/caampkc.h
+++ /dev/null
@@ -1,155 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * caam - Freescale FSL CAAM support for Public Key Cryptography descriptors
- *
- * Copyright 2016 Freescale Semiconductor, Inc.
- *
- * There is no Shared Descriptor for PKC so that the Job Descriptor must carry
- * all the desired key parameters, input and output pointers.
- */
-
-#ifndef _PKC_DESC_H_
-#define _PKC_DESC_H_
-#include "compat.h"
-#include "pdb.h"
-
-/**
- * caam_priv_key_form - CAAM RSA private key representation
- * CAAM RSA private key may have either of three forms.
- *
- * 1. The first representation consists of the pair (n, d), where the
- *    components have the following meanings:
- *        n      the RSA modulus
- *        d      the RSA private exponent
- *
- * 2. The second representation consists of the triplet (p, q, d), where the
- *    components have the following meanings:
- *        p      the first prime factor of the RSA modulus n
- *        q      the second prime factor of the RSA modulus n
- *        d      the RSA private exponent
- *
- * 3. The third representation consists of the quintuple (p, q, dP, dQ, qInv),
- *    where the components have the following meanings:
- *        p      the first prime factor of the RSA modulus n
- *        q      the second prime factor of the RSA modulus n
- *        dP     the first factors's CRT exponent
- *        dQ     the second factors's CRT exponent
- *        qInv   the (first) CRT coefficient
- *
- * The benefit of using the third or the second key form is lower computational
- * cost for the decryption and signature operations.
- */
-enum caam_priv_key_form {
-	FORM1,
-	FORM2,
-	FORM3
-};
-
-/**
- * caam_rsa_key - CAAM RSA key structure. Keys are allocated in DMA zone.
- * @n           : RSA modulus raw byte stream
- * @e           : RSA public exponent raw byte stream
- * @d           : RSA private exponent raw byte stream
- * @p           : RSA prime factor p of RSA modulus n
- * @q           : RSA prime factor q of RSA modulus n
- * @dp          : RSA CRT exponent of p
- * @dp          : RSA CRT exponent of q
- * @qinv        : RSA CRT coefficient
- * @tmp1        : CAAM uses this temporary buffer as internal state buffer.
- *                It is assumed to be as long as p.
- * @tmp2        : CAAM uses this temporary buffer as internal state buffer.
- *                It is assumed to be as long as q.
- * @n_sz        : length in bytes of RSA modulus n
- * @e_sz        : length in bytes of RSA public exponent
- * @d_sz        : length in bytes of RSA private exponent
- * @p_sz        : length in bytes of RSA prime factor p of RSA modulus n
- * @q_sz        : length in bytes of RSA prime factor q of RSA modulus n
- * @priv_form   : CAAM RSA private key representation
- */
-struct caam_rsa_key {
-	u8 *n;
-	u8 *e;
-	u8 *d;
-	u8 *p;
-	u8 *q;
-	u8 *dp;
-	u8 *dq;
-	u8 *qinv;
-	u8 *tmp1;
-	u8 *tmp2;
-	size_t n_sz;
-	size_t e_sz;
-	size_t d_sz;
-	size_t p_sz;
-	size_t q_sz;
-	enum caam_priv_key_form priv_form;
-};
-
-/**
- * caam_rsa_ctx - per session context.
- * @key         : RSA key in DMA zone
- * @dev         : device structure
- * @padding_dma : dma address of padding, for adding it to the input
- */
-struct caam_rsa_ctx {
-	struct caam_rsa_key key;
-	struct device *dev;
-	dma_addr_t padding_dma;
-
-};
-
-/**
- * caam_rsa_req_ctx - per request context.
- * @src           : input scatterlist (stripped of leading zeros)
- * @fixup_src     : input scatterlist (that might be stripped of leading zeros)
- * @fixup_src_len : length of the fixup_src input scatterlist
- * @edesc         : s/w-extended rsa descriptor
- * @akcipher_op_done : callback used when operation is done
- */
-struct caam_rsa_req_ctx {
-	struct scatterlist src[2];
-	struct scatterlist *fixup_src;
-	unsigned int fixup_src_len;
-	struct rsa_edesc *edesc;
-	void (*akcipher_op_done)(struct device *jrdev, u32 *desc, u32 err,
-				 void *context);
-};
-
-/**
- * rsa_edesc - s/w-extended rsa descriptor
- * @src_nents     : number of segments in input s/w scatterlist
- * @dst_nents     : number of segments in output s/w scatterlist
- * @mapped_src_nents: number of segments in input h/w link table
- * @mapped_dst_nents: number of segments in output h/w link table
- * @sec4_sg_bytes : length of h/w link table
- * @bklog         : stored to determine if the request needs backlog
- * @sec4_sg_dma   : dma address of h/w link table
- * @sec4_sg       : pointer to h/w link table
- * @pdb           : specific RSA Protocol Data Block (PDB)
- * @hw_desc       : descriptor followed by link tables if any
- */
-struct rsa_edesc {
-	int src_nents;
-	int dst_nents;
-	int mapped_src_nents;
-	int mapped_dst_nents;
-	int sec4_sg_bytes;
-	bool bklog;
-	dma_addr_t sec4_sg_dma;
-	struct sec4_sg_entry *sec4_sg;
-	union {
-		struct rsa_pub_pdb pub;
-		struct rsa_priv_f1_pdb priv_f1;
-		struct rsa_priv_f2_pdb priv_f2;
-		struct rsa_priv_f3_pdb priv_f3;
-	} pdb;
-	u32 hw_desc[];
-};
-
-/* Descriptor construction primitives. */
-void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb);
-void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb);
-void init_rsa_priv_f2_desc(u32 *desc, struct rsa_priv_f2_pdb *pdb);
-void init_rsa_priv_f3_desc(u32 *desc, struct rsa_priv_f3_pdb *pdb);
-
-#endif
diff --git a/drivers/crypto/caam/pkc_desc.c b/drivers/crypto/caam/pkc_desc.c
deleted file mode 100644
index 0d5ee762e036..000000000000
--- a/drivers/crypto/caam/pkc_desc.c
+++ /dev/null
@@ -1,73 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * caam - Freescale FSL CAAM support for Public Key Cryptography descriptors
- *
- * Copyright 2016 Freescale Semiconductor, Inc.
- *
- * There is no Shared Descriptor for PKC so that the Job Descriptor must carry
- * all the desired key parameters, input and output pointers.
- */
-#include "caampkc.h"
-#include "desc_constr.h"
-
-/* Descriptor for RSA Public operation */
-void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb)
-{
-	init_job_desc_pdb(desc, 0, SIZEOF_RSA_PUB_PDB);
-	append_cmd(desc, pdb->sgf);
-	append_ptr(desc, pdb->f_dma);
-	append_ptr(desc, pdb->g_dma);
-	append_ptr(desc, pdb->n_dma);
-	append_ptr(desc, pdb->e_dma);
-	append_cmd(desc, pdb->f_len);
-	append_operation(desc, OP_TYPE_UNI_PROTOCOL | OP_PCLID_RSAENC_PUBKEY);
-}
-
-/* Descriptor for RSA Private operation - Private Key Form #1 */
-void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb)
-{
-	init_job_desc_pdb(desc, 0, SIZEOF_RSA_PRIV_F1_PDB);
-	append_cmd(desc, pdb->sgf);
-	append_ptr(desc, pdb->g_dma);
-	append_ptr(desc, pdb->f_dma);
-	append_ptr(desc, pdb->n_dma);
-	append_ptr(desc, pdb->d_dma);
-	append_operation(desc, OP_TYPE_UNI_PROTOCOL | OP_PCLID_RSADEC_PRVKEY |
-			 RSA_PRIV_KEY_FRM_1);
-}
-
-/* Descriptor for RSA Private operation - Private Key Form #2 */
-void init_rsa_priv_f2_desc(u32 *desc, struct rsa_priv_f2_pdb *pdb)
-{
-	init_job_desc_pdb(desc, 0, SIZEOF_RSA_PRIV_F2_PDB);
-	append_cmd(desc, pdb->sgf);
-	append_ptr(desc, pdb->g_dma);
-	append_ptr(desc, pdb->f_dma);
-	append_ptr(desc, pdb->d_dma);
-	append_ptr(desc, pdb->p_dma);
-	append_ptr(desc, pdb->q_dma);
-	append_ptr(desc, pdb->tmp1_dma);
-	append_ptr(desc, pdb->tmp2_dma);
-	append_cmd(desc, pdb->p_q_len);
-	append_operation(desc, OP_TYPE_UNI_PROTOCOL | OP_PCLID_RSADEC_PRVKEY |
-			 RSA_PRIV_KEY_FRM_2);
-}
-
-/* Descriptor for RSA Private operation - Private Key Form #3 */
-void init_rsa_priv_f3_desc(u32 *desc, struct rsa_priv_f3_pdb *pdb)
-{
-	init_job_desc_pdb(desc, 0, SIZEOF_RSA_PRIV_F3_PDB);
-	append_cmd(desc, pdb->sgf);
-	append_ptr(desc, pdb->g_dma);
-	append_ptr(desc, pdb->f_dma);
-	append_ptr(desc, pdb->c_dma);
-	append_ptr(desc, pdb->p_dma);
-	append_ptr(desc, pdb->q_dma);
-	append_ptr(desc, pdb->dp_dma);
-	append_ptr(desc, pdb->dq_dma);
-	append_ptr(desc, pdb->tmp1_dma);
-	append_ptr(desc, pdb->tmp2_dma);
-	append_cmd(desc, pdb->p_q_len);
-	append_operation(desc, OP_TYPE_UNI_PROTOCOL | OP_PCLID_RSADEC_PRVKEY |
-			 RSA_PRIV_KEY_FRM_3);
-}
diff --git a/drivers/crypto/caam/Kconfig b/drivers/crypto/caam/Kconfig
index ec57bf6aaf6c..94f19126f61b 100644
--- a/drivers/crypto/caam/Kconfig
+++ b/drivers/crypto/caam/Kconfig
@@ -133,15 +133,6 @@ config CRYPTO_DEV_FSL_CAAM_AHASH_API
 	  Selecting this will offload ahash for users of the
 	  scatterlist crypto API to the SEC4 via job ring.
 
-config CRYPTO_DEV_FSL_CAAM_PKC_API
-	bool "Register public key cryptography implementations with Crypto API"
-	default y
-	select CRYPTO_RSA
-	help
-	  Selecting this will allow SEC Public key support for RSA.
-	  Supported cryptographic primitives: encryption, decryption,
-	  signature and verification.
-
 config CRYPTO_DEV_FSL_CAAM_RNG_API
 	bool "Register caam device for hwrng API"
 	default y
diff --git a/drivers/crypto/caam/Makefile b/drivers/crypto/caam/Makefile
index a17e3cf14c61..87a82474b841 100644
--- a/drivers/crypto/caam/Makefile
+++ b/drivers/crypto/caam/Makefile
@@ -20,7 +20,6 @@ caam_jr-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API) += caamalg.o
 caam_jr-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_QI) += caamalg_qi.o
 caam_jr-$(CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API) += caamhash.o
 caam_jr-$(CONFIG_CRYPTO_DEV_FSL_CAAM_RNG_API) += caamrng.o
-caam_jr-$(CONFIG_CRYPTO_DEV_FSL_CAAM_PKC_API) += caampkc.o pkc_desc.o
 caam_jr-$(CONFIG_CRYPTO_DEV_FSL_CAAM_BLOB_GEN) += blob_gen.o
 
 caam-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_QI) += qi.o
diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h
index 6e48bf7d6054..744b6586171c 100644
--- a/drivers/crypto/caam/intern.h
+++ b/drivers/crypto/caam/intern.h
@@ -178,24 +178,6 @@ static inline void caam_algapi_hash_exit(void)
 
 #endif /* CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API */
 
-#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_PKC_API
-
-int caam_pkc_init(struct device *dev);
-void caam_pkc_exit(void);
-
-#else
-
-static inline int caam_pkc_init(struct device *dev)
-{
-	return 0;
-}
-
-static inline void caam_pkc_exit(void)
-{
-}
-
-#endif /* CONFIG_CRYPTO_DEV_FSL_CAAM_PKC_API */
-
 #ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_RNG_API
 
 int caam_rng_init(struct device *dev);
diff --git a/drivers/crypto/caam/jr.c b/drivers/crypto/caam/jr.c
index 239469f6882e..2c1e8275ddaf 100644
--- a/drivers/crypto/caam/jr.c
+++ b/drivers/crypto/caam/jr.c
@@ -38,7 +38,6 @@ static void register_algs(struct caam_drv_private_jr *jrpriv,
 
 	caam_algapi_init(dev);
 	caam_algapi_hash_init(dev);
-	caam_pkc_init(dev);
 	jrpriv->hwrng = !caam_rng_init(dev);
 	caam_qi_algapi_init(dev);
 
@@ -54,7 +53,6 @@ static void unregister_algs(void)
 		goto algs_unlock;
 
 	caam_qi_algapi_exit();
-	caam_pkc_exit();
 	caam_algapi_hash_exit();
 	caam_algapi_exit();
 
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt