[PATCH v15 11/21] compress/zsda: add treatment of compressdev cqe and chksum

[Hanxiao Li]

Add cqe and chksum treatment of the compressdev.

Signed-off-by: Hanxiao Li <li.hanxiao at zte.com.cn>
---
 drivers/compress/zsda/zsda_comp.c | 160 ++++++++++++++++++++++++++++++
 drivers/compress/zsda/zsda_comp.h |   8 ++
 2 files changed, 168 insertions(+)

diff --git a/drivers/compress/zsda/zsda_comp.c b/drivers/compress/zsda/zsda_comp.c
index 9f1b237c1f..9af5cb5792 100644
--- a/drivers/compress/zsda/zsda_comp.c
+++ b/drivers/compress/zsda/zsda_comp.c
@@ -8,6 +8,88 @@
 #define ZLIB_TRAILER_SIZE 4
 #define GZIP_HEADER_SIZE 10
 #define GZIP_TRAILER_SIZE 8
+#define CHECKSUM_SIZE 4
+
+static uint32_t zsda_read_chksum(uint8_t *data_addr, uint8_t op_code,
+				 uint32_t produced);
+
+
+#define POLYNOMIAL 0xEDB88320
+static uint32_t crc32_table[8][256];
+static int table_config;
+
+static void
+build_crc32_table(void)
+{
+	for (uint32_t i = 0; i < 256; i++) {
+		uint32_t crc = i;
+		for (uint32_t j = 0; j < 8; j++)
+			crc = (crc >> 1) ^ ((crc & 1) ? POLYNOMIAL : 0);
+		crc32_table[0][i] = crc;
+	}
+
+	for (int i = 1; i < 8; i++) {
+		for (uint32_t j = 0; j < 256; j++)
+			crc32_table[i][j] = (crc32_table[i-1][j] >> 8) ^
+					crc32_table[0][crc32_table[i-1][j] & 0xFF];
+	}
+	table_config = 1;
+}
+
+static uint32_t
+zsda_crc32(const uint8_t *data, size_t length)
+{
+	uint32_t crc = 0xFFFFFFFF;
+
+	if (!table_config)
+		build_crc32_table();
+
+	while (length >= 8) {
+		crc ^= *(const uint32_t *)data;
+		crc = crc32_table[7][crc & 0xFF] ^
+			  crc32_table[6][(crc >> 8) & 0xFF] ^
+			  crc32_table[5][(crc >> 16) & 0xFF] ^
+			  crc32_table[4][(crc >> 24) & 0xFF] ^
+			  crc32_table[3][data[4]] ^
+			  crc32_table[2][data[5]] ^
+			  crc32_table[1][data[6]] ^
+			  crc32_table[0][data[7]];
+
+		data += 8;
+		length -= 8;
+	}
+
+	for (size_t i = 0; i < length; i++)
+		crc = (crc >> 8) ^ crc32_table[0][(crc ^ data[i]) & 0xFF];
+
+	return crc ^ 0xFFFFFFFF;
+}
+
+#define MOD_ADLER 65521
+#define NMAX 5552
+static uint32_t
+zsda_adler32(const uint8_t *buf, uint32_t len)
+{
+	uint32_t s1 = 1;
+	uint32_t s2 = 0;
+
+	while (len > 0) {
+		uint32_t k = (len < NMAX) ? len : NMAX;
+		len -= k;
+
+		for (uint32_t i = 0; i < k; i++) {
+			s1 += buf[i];
+			s2 += s1;
+		}
+
+		s1 %= MOD_ADLER;
+		s2 %= MOD_ADLER;
+
+		buf += k;
+	}
+
+	return (s2 << 16) | s1;
+}
 
 int
 zsda_comp_match(const void *op_in)
@@ -230,3 +312,81 @@ zsda_build_decomp_request(void *op_in, const struct zsda_queue *queue,
 
 	return ret;
 }
+
+int
+zsda_comp_callback(void *cookie_in, struct zsda_cqe *cqe)
+{
+	struct zsda_op_cookie *tmp_cookie = cookie_in;
+	struct rte_comp_op *tmp_op = tmp_cookie->op;
+	uint8_t *data_addr =
+		(uint8_t *)tmp_op->m_dst->buf_addr + tmp_op->m_dst->data_off;
+	uint32_t chksum = 0;
+	uint16_t head_len;
+	uint16_t tail_len;
+
+	if (tmp_cookie->decomp_no_tail && CQE_ERR0_RIGHT(cqe->err0))
+		cqe->err0 = 0x0000;
+
+	if (!(CQE_ERR0(cqe->err0) || CQE_ERR1(cqe->err1)))
+		tmp_op->status = RTE_COMP_OP_STATUS_SUCCESS;
+	else {
+		tmp_op->status = RTE_COMP_OP_STATUS_ERROR;
+		return ZSDA_FAILED;
+	}
+
+	/* handle chksum */
+	tmp_op->produced = cqe->tx_real_length;
+	if (cqe->op_code == ZSDA_OPC_COMP_ZLIB) {
+		head_len = ZLIB_HEADER_SIZE;
+		tail_len = ZLIB_TRAILER_SIZE;
+		chksum = zsda_read_chksum(data_addr, cqe->op_code,
+						  tmp_op->produced - head_len);
+	}
+	if (cqe->op_code == ZSDA_OPC_COMP_GZIP) {
+		head_len = GZIP_HEADER_SIZE;
+		tail_len = GZIP_TRAILER_SIZE;
+		chksum = zsda_read_chksum(data_addr, cqe->op_code,
+						  tmp_op->produced - head_len);
+	} else if (cqe->op_code == ZSDA_OPC_DECOMP_ZLIB) {
+		head_len = ZLIB_HEADER_SIZE;
+		tail_len = ZLIB_TRAILER_SIZE;
+		chksum = zsda_adler32(data_addr, tmp_op->produced);
+	} else if (cqe->op_code == ZSDA_OPC_DECOMP_GZIP) {
+		head_len = GZIP_HEADER_SIZE;
+		tail_len = GZIP_TRAILER_SIZE;
+		chksum = zsda_crc32(data_addr, tmp_op->produced);
+	}
+	tmp_op->output_chksum = chksum;
+
+	if (cqe->op_code == ZSDA_OPC_COMP_ZLIB ||
+		cqe->op_code == ZSDA_OPC_COMP_GZIP) {
+		/* remove tail data*/
+		rte_pktmbuf_trim(tmp_op->m_dst, GZIP_TRAILER_SIZE);
+		/* remove head and tail length */
+		tmp_op->produced = tmp_op->produced - (head_len + tail_len);
+	}
+
+	return ZSDA_SUCCESS;
+}
+
+static uint32_t
+zsda_read_chksum(uint8_t *data_addr, uint8_t op_code, uint32_t produced)
+{
+	uint8_t *chk_addr;
+	uint32_t chksum = 0;
+	int i = 0;
+
+	if (op_code == ZSDA_OPC_COMP_ZLIB) {
+		chk_addr = data_addr + produced - ZLIB_TRAILER_SIZE;
+		for (i = 0; i < CHECKSUM_SIZE; i++) {
+			chksum = chksum << 8;
+			chksum |= (*(chk_addr + i));
+		}
+	} else if (op_code == ZSDA_OPC_COMP_GZIP) {
+		chk_addr = data_addr + produced - GZIP_TRAILER_SIZE;
+		for (i = 0; i < CHECKSUM_SIZE; i++)
+			chksum |= (*(chk_addr + i) << (i * 8));
+	}
+
+	return chksum;
+}
diff --git a/drivers/compress/zsda/zsda_comp.h b/drivers/compress/zsda/zsda_comp.h
index 8a4dd29865..b0238a6a2a 100644
--- a/drivers/compress/zsda/zsda_comp.h
+++ b/drivers/compress/zsda/zsda_comp.h
@@ -33,6 +33,14 @@ struct zsda_wqe_comp {
 	struct compress_cfg cfg;
 } __rte_packed;
 
+/* For situations where err0 are reported but the results are correct */
+#define DECOMP_RIGHT_ERR0_0 0xc710
+#define DECOMP_RIGHT_ERR0_1 0xc727
+#define DECOMP_RIGHT_ERR0_2 0xc729
+#define CQE_ERR0_RIGHT(value)                                                  \
+	(value == DECOMP_RIGHT_ERR0_0 || value == DECOMP_RIGHT_ERR0_1 ||       \
+	 value == DECOMP_RIGHT_ERR0_2)
+
 int zsda_comp_match(const void *op_in);
 int zsda_build_comp_request(void *op_in, const struct zsda_queue *queue,
 		       void **op_cookies, const uint16_t new_tail);
-- 
2.27.0
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