crypto: octeontx2 - increase CPT HW instruction queue length

LDWB is getting incorrectly used in HW when
CPT_AF_LF()_PTR_CTL[IQB_LDWB]=1 and CPT instruction queue has less than
320 free entries. So, increase HW instruction queue size by 320 and give
320 entries less for SW/NIX RX as a SW workaround.

Signed-off-by: Srujana Challa <schalla@marvell.com>
Signed-off-by: Shijith Thotton <sthotton@marvell.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/marvell/octeontx2/otx2_cptlf.h b/drivers/crypto/marvell/octeontx2/otx2_cptlf.h
index b691b6c1d5c45a05dc5aa228628e239c00a17e1e..4fcaf61a70e36b092b0d96afb332c654be7edb4d 100644 (file)
--- a/drivers/crypto/marvell/octeontx2/otx2_cptlf.h
+++ b/drivers/crypto/marvell/octeontx2/otx2_cptlf.h
@@ -26,12 +26,22 @@
  */
 #define OTX2_CPT_INST_QLEN_MSGS        ((OTX2_CPT_SIZE_DIV40 - 1) * 40)
 
+/*
+ * LDWB is getting incorrectly used when IQB_LDWB = 1 and CPT instruction
+ * queue has less than 320 free entries. So, increase HW instruction queue
+ * size by 320 and give 320 entries less for SW/NIX RX as a workaround.
+ */
+#define OTX2_CPT_INST_QLEN_EXTRA_BYTES  (320 * OTX2_CPT_INST_SIZE)
+#define OTX2_CPT_EXTRA_SIZE_DIV40       (320/40)
+
 /* CPT instruction queue length in bytes */
-#define OTX2_CPT_INST_QLEN_BYTES (OTX2_CPT_SIZE_DIV40 * 40 * \
-                                 OTX2_CPT_INST_SIZE)
+#define OTX2_CPT_INST_QLEN_BYTES                                               \
+               ((OTX2_CPT_SIZE_DIV40 * 40 * OTX2_CPT_INST_SIZE) +             \
+               OTX2_CPT_INST_QLEN_EXTRA_BYTES)
 
 /* CPT instruction group queue length in bytes */
-#define OTX2_CPT_INST_GRP_QLEN_BYTES (OTX2_CPT_SIZE_DIV40 * 16)
+#define OTX2_CPT_INST_GRP_QLEN_BYTES                                           \
+               ((OTX2_CPT_SIZE_DIV40 + OTX2_CPT_EXTRA_SIZE_DIV40) * 16)
 
 /* CPT FC length in bytes */
 #define OTX2_CPT_Q_FC_LEN 128
@@ -179,7 +189,8 @@ static inline void otx2_cptlf_do_set_iqueue_size(struct otx2_cptlf_info *lf)
 {
        union otx2_cptx_lf_q_size lf_q_size = { .u = 0x0 };
 
-       lf_q_size.s.size_div40 = OTX2_CPT_SIZE_DIV40;
+       lf_q_size.s.size_div40 = OTX2_CPT_SIZE_DIV40 +
+                                OTX2_CPT_EXTRA_SIZE_DIV40;
        otx2_cpt_write64(lf->lfs->reg_base, BLKADDR_CPT0, lf->slot,
                         OTX2_CPT_LF_Q_SIZE, lf_q_size.u);
 }