[RFC PATCH 3/6] Revert "crypto: qat - Remove zlib-deflate"

Giovanni Cabiddu
2024-04-26T11:10:11Z

This reverts commit e9dd20e0e5f62d01d9404db2cf9824d1faebcf71.
---
.../intel/qat/qat_common/qat_comp_algs.c | 129 +++++++++++++++++-
1 file changed, 128 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/intel/qat/qat_common/qat_comp_algs.c b/drivers/crypto/intel/qat/qat_common/qat_comp_algs.c
index 2ba4aa22e092..79de04cfa012 100644
--- a/drivers/crypto/intel/qat/qat_common/qat_comp_algs.c
+++ b/drivers/crypto/intel/qat/qat_common/qat_comp_algs.c
@@ -100,6 +100,69 @@ static void qat_comp_resubmit(struct work_struct *work)
acomp_request_complete(areq, ret);
}

+static int parse_zlib_header(u16 zlib_h)
+{
+ int ret = -EINVAL;
+ __be16 header;
+ u8 *header_p;
+ u8 cmf, flg;
+
+ header = cpu_to_be16(zlib_h);
+ header_p = (u8 *)&header;
+
+ flg = header_p[0];
+ cmf = header_p[1];
+
+ if (cmf >> QAT_RFC_1950_CM_OFFSET > QAT_RFC_1950_CM_DEFLATE_CINFO_32K)
+ return ret;
+
+ if ((cmf & QAT_RFC_1950_CM_MASK) != QAT_RFC_1950_CM_DEFLATE)
+ return ret;
+
+ if (flg & QAT_RFC_1950_DICT_MASK)
+ return ret;
+
+ return 0;
+}
+
+static int qat_comp_rfc1950_callback(struct qat_compression_req *qat_req,
+ void *resp)
+{
+ struct acomp_req *areq = qat_req->acompress_req;
+ enum direction dir = qat_req->dir;
+ __be32 qat_produced_adler;
+
+ qat_produced_adler = cpu_to_be32(qat_comp_get_produced_adler32(resp));
+
+ if (dir == COMPRESSION) {
+ __be16 zlib_header;
+
+ zlib_header = cpu_to_be16(QAT_RFC_1950_COMP_HDR);
+ scatterwalk_map_and_copy(&zlib_header, areq->dst, 0, QAT_RFC_1950_HDR_SIZE, 1);
+ areq->dlen += QAT_RFC_1950_HDR_SIZE;
+
+ scatterwalk_map_and_copy(&qat_produced_adler, areq->dst, areq->dlen,
+ QAT_RFC_1950_FOOTER_SIZE, 1);
+ areq->dlen += QAT_RFC_1950_FOOTER_SIZE;
+ } else {
+ __be32 decomp_adler;
+ int footer_offset;
+ int consumed;
+
+ consumed = qat_comp_get_consumed_ctr(resp);
+ footer_offset = consumed + QAT_RFC_1950_HDR_SIZE;
+ if (footer_offset + QAT_RFC_1950_FOOTER_SIZE > areq->slen)
+ return -EBADMSG;
+
+ scatterwalk_map_and_copy(&decomp_adler, areq->src, footer_offset,
+ QAT_RFC_1950_FOOTER_SIZE, 0);
+
+ if (qat_produced_adler != decomp_adler)
+ return -EBADMSG;
+ }
+ return 0;
+}
+
static void qat_comp_generic_callback(struct qat_compression_req *qat_req,
void *resp)
{
@@ -221,6 +284,18 @@ static void qat_comp_alg_exit_tfm(struct crypto_acomp *acomp_tfm)
memset(ctx, 0, sizeof(*ctx));
}

+static int qat_comp_alg_rfc1950_init_tfm(struct crypto_acomp *acomp_tfm)
+{
+ struct crypto_tfm *tfm = crypto_acomp_tfm(acomp_tfm);
+ struct qat_compression_ctx *ctx = crypto_tfm_ctx(tfm);
+ int ret;
+
+ ret = qat_comp_alg_init_tfm(acomp_tfm);
+ ctx->qat_comp_callback = &qat_comp_rfc1950_callback;
+
+ return ret;
+}
+
static int qat_comp_alg_compress_decompress(struct acomp_req *areq, enum direction dir,
unsigned int shdr, unsigned int sftr,
unsigned int dhdr, unsigned int dftr)
@@ -316,6 +391,43 @@ static int qat_comp_alg_decompress(struct acomp_req *req)
return qat_comp_alg_compress_decompress(req, DECOMPRESSION, 0, 0, 0, 0);
}

+static int qat_comp_alg_rfc1950_compress(struct acomp_req *req)
+{
+ if (!req->dst && req->dlen != 0)
+ return -EINVAL;
+
+ if (req->dst && req->dlen <= QAT_RFC_1950_HDR_SIZE + QAT_RFC_1950_FOOTER_SIZE)
+ return -EINVAL;
+
+ return qat_comp_alg_compress_decompress(req, COMPRESSION, 0, 0,
+ QAT_RFC_1950_HDR_SIZE,
+ QAT_RFC_1950_FOOTER_SIZE);
+}
+
+static int qat_comp_alg_rfc1950_decompress(struct acomp_req *req)
+{
+ struct crypto_acomp *acomp_tfm = crypto_acomp_reqtfm(req);
+ struct crypto_tfm *tfm = crypto_acomp_tfm(acomp_tfm);
+ struct qat_compression_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct adf_accel_dev *accel_dev = ctx->inst->accel_dev;
+ u16 zlib_header;
+ int ret;
+
+ if (req->slen <= QAT_RFC_1950_HDR_SIZE + QAT_RFC_1950_FOOTER_SIZE)
+ return -EBADMSG;
+
+ scatterwalk_map_and_copy(&zlib_header, req->src, 0, QAT_RFC_1950_HDR_SIZE, 0);
+
+ ret = parse_zlib_header(zlib_header);
+ if (ret) {
+ dev_dbg(&GET_DEV(accel_dev), "Error parsing zlib header\n");
+ return ret;
+ }
+
+ return qat_comp_alg_compress_decompress(req, DECOMPRESSION, QAT_RFC_1950_HDR_SIZE,
+ QAT_RFC_1950_FOOTER_SIZE, 0, 0);
+}
+
static struct acomp_alg qat_acomp[] = { {
.base = {
.cra_name = "deflate",
@@ -331,7 +443,22 @@ static struct acomp_alg qat_acomp[] = { {
.decompress = qat_comp_alg_decompress,
.dst_free = sgl_free,
.reqsize = sizeof(struct qat_compression_req),
-}};
+}, {
+ .base = {
+ .cra_name = "zlib-deflate",
+ .cra_driver_name = "qat_zlib_deflate",
+ .cra_priority = 4001,
+ .cra_flags = CRYPTO_ALG_ASYNC,
+ .cra_ctxsize = sizeof(struct qat_compression_ctx),
+ .cra_module = THIS_MODULE,
+ },
+ .init = qat_comp_alg_rfc1950_init_tfm,
+ .exit = qat_comp_alg_exit_tfm,
+ .compress = qat_comp_alg_rfc1950_compress,
+ .decompress = qat_comp_alg_rfc1950_decompress,
+ .dst_free = sgl_free,
+ .reqsize = sizeof(struct qat_compression_req),
+} };

int qat_comp_algs_register(void)
{
--
2.44.0