[PATCH net-next v2 04/10] crypto: octeontx2: add devlink option to set t106 mode

[Srujana Challa <schalla@xxxxxxxxxxx>]

On CN10KA B0/CN10KB, CPT scatter gather format has modified
to support multi-seg in inline IPsec. Due to this CPT requires
new firmware and doesn't work with CN10KA0/A1 firmware. To make
HW works in backward compatibility mode or works with CN10KA0/A1
firmware, a bit(T106_MODE) is introduced in HW CSR.

This patch adds devlink parameter for configuring T106_MODE.

Signed-off-by: Srujana Challa <schalla@xxxxxxxxxxx>
---
 .../crypto/device_drivers/octeontx2.rst       |  4 ++
 .../marvell/octeontx2/otx2_cpt_common.h       |  8 +++
 .../marvell/octeontx2/otx2_cpt_devlink.c      | 50 +++++++++++++++++--
 .../marvell/octeontx2/otx2_cptpf_main.c       |  4 +-
 4 files changed, 59 insertions(+), 7 deletions(-)

diff --git a/Documentation/crypto/device_drivers/octeontx2.rst b/Documentation/crypto/device_drivers/octeontx2.rst
index 0481bdcd77e9..288998c10b3d 100644
--- a/Documentation/crypto/device_drivers/octeontx2.rst
+++ b/Documentation/crypto/device_drivers/octeontx2.rst
@@ -23,3 +23,7 @@ The ``octeontx2`` driver implements the following driver-specific parameters.
      - u16
      - runtime
      - Configures maximum icb entries that HW can use in RX path.
+   * - ``t106_mode``
+     - u8
+     - runtime
+     - Used to configure CN10KA B0/CN10KB CPT to work as CN10KA A0/A1.
diff --git a/drivers/crypto/marvell/octeontx2/otx2_cpt_common.h b/drivers/crypto/marvell/octeontx2/otx2_cpt_common.h
index be90b6cc3b71..df7321193f19 100644
--- a/drivers/crypto/marvell/octeontx2/otx2_cpt_common.h
+++ b/drivers/crypto/marvell/octeontx2/otx2_cpt_common.h
@@ -194,6 +194,14 @@ static inline bool cpt_feature_rxc_icb_cnt(struct pci_dev *pdev)
 	return false;
 }
 
+static inline bool cpt_feature_sgv2(struct pci_dev *pdev)
+{
+	if (!is_dev_otx2(pdev) && !is_dev_cn10ka_ax(pdev))
+		return true;
+
+	return false;
+}
+
 int otx2_cpt_send_ready_msg(struct otx2_mbox *mbox, struct pci_dev *pdev);
 int otx2_cpt_send_mbox_msg(struct otx2_mbox *mbox, struct pci_dev *pdev);
 
diff --git a/drivers/crypto/marvell/octeontx2/otx2_cpt_devlink.c b/drivers/crypto/marvell/octeontx2/otx2_cpt_devlink.c
index 16000dd19011..4654b8438154 100644
--- a/drivers/crypto/marvell/octeontx2/otx2_cpt_devlink.c
+++ b/drivers/crypto/marvell/octeontx2/otx2_cpt_devlink.c
@@ -24,10 +24,7 @@ static int otx2_cpt_dl_egrp_delete(struct devlink *dl, u32 id,
 static int otx2_cpt_dl_uc_info(struct devlink *dl, u32 id,
 			       struct devlink_param_gset_ctx *ctx)
 {
-	struct otx2_cpt_devlink *cpt_dl = devlink_priv(dl);
-	struct otx2_cptpf_dev *cptpf = cpt_dl->cptpf;
-
-	otx2_cpt_print_uc_dbg_info(cptpf);
+	ctx->val.vstr[0] = '\0';
 
 	return 0;
 }
@@ -70,11 +67,50 @@ static int otx2_cpt_dl_max_rxc_icb_cnt_set(struct devlink *dl, u32 id,
 	return 0;
 }
 
+static int otx2_cpt_dl_t106_mode_get(struct devlink *dl, u32 id,
+				     struct devlink_param_gset_ctx *ctx)
+{
+	struct otx2_cpt_devlink *cpt_dl = devlink_priv(dl);
+	struct otx2_cptpf_dev *cptpf = cpt_dl->cptpf;
+	struct pci_dev *pdev = cptpf->pdev;
+	u64 reg_val = 0;
+
+	otx2_cpt_read_af_reg(&cptpf->afpf_mbox, pdev, CPT_AF_CTL, &reg_val,
+			     BLKADDR_CPT0);
+	ctx->val.vu8 = (reg_val >> 18) & 0x1;
+
+	return 0;
+}
+
+static int otx2_cpt_dl_t106_mode_set(struct devlink *dl, u32 id,
+				     struct devlink_param_gset_ctx *ctx)
+{
+	struct otx2_cpt_devlink *cpt_dl = devlink_priv(dl);
+	struct otx2_cptpf_dev *cptpf = cpt_dl->cptpf;
+	struct pci_dev *pdev = cptpf->pdev;
+	u64 reg_val = 0;
+
+	if (cptpf->enabled_vfs != 0 || cptpf->eng_grps.is_grps_created)
+		return -EPERM;
+
+	if (cpt_feature_sgv2(pdev)) {
+		otx2_cpt_read_af_reg(&cptpf->afpf_mbox, pdev, CPT_AF_CTL,
+				     &reg_val, BLKADDR_CPT0);
+		reg_val &= ~(0x1ULL << 18);
+		reg_val |= ((u64)ctx->val.vu8 & 0x1) << 18;
+		return otx2_cpt_write_af_reg(&cptpf->afpf_mbox, pdev,
+					     CPT_AF_CTL, reg_val, BLKADDR_CPT0);
+	}
+
+	return 0;
+}
+
 enum otx2_cpt_dl_param_id {
 	OTX2_CPT_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
 	OTX2_CPT_DEVLINK_PARAM_ID_EGRP_CREATE,
 	OTX2_CPT_DEVLINK_PARAM_ID_EGRP_DELETE,
 	OTX2_CPT_DEVLINK_PARAM_ID_MAX_RXC_ICB_CNT,
+	OTX2_CPT_DEVLINK_PARAM_ID_T106_MODE,
 };
 
 static const struct devlink_param otx2_cpt_dl_params[] = {
@@ -94,6 +130,11 @@ static const struct devlink_param otx2_cpt_dl_params[] = {
 			     otx2_cpt_dl_max_rxc_icb_cnt,
 			     otx2_cpt_dl_max_rxc_icb_cnt_set,
 			     NULL),
+	DEVLINK_PARAM_DRIVER(OTX2_CPT_DEVLINK_PARAM_ID_T106_MODE,
+			     "t106_mode", DEVLINK_PARAM_TYPE_U8,
+			     BIT(DEVLINK_PARAM_CMODE_RUNTIME),
+			     otx2_cpt_dl_t106_mode_get, otx2_cpt_dl_t106_mode_set,
+			     NULL),
 };
 
 static int otx2_cpt_dl_info_firmware_version_put(struct devlink_info_req *req,
@@ -165,7 +206,6 @@ int otx2_cpt_register_dl(struct otx2_cptpf_dev *cptpf)
 		devlink_free(dl);
 		return ret;
 	}
-
 	devlink_register(dl);
 
 	return 0;
diff --git a/drivers/crypto/marvell/octeontx2/otx2_cptpf_main.c b/drivers/crypto/marvell/octeontx2/otx2_cptpf_main.c
index 1d27dc3218c9..8cbfffab12e3 100644
--- a/drivers/crypto/marvell/octeontx2/otx2_cptpf_main.c
+++ b/drivers/crypto/marvell/octeontx2/otx2_cptpf_main.c
@@ -600,10 +600,10 @@ static void cptpf_get_rid(struct pci_dev *pdev, struct otx2_cptpf_dev *cptpf)
 	}
 	otx2_cpt_read_af_reg(&cptpf->afpf_mbox, pdev, CPT_AF_CTL, &reg_val,
 			     BLKADDR_CPT0);
-	if ((is_dev_cn10ka_b0(pdev) && (reg_val & BIT_ULL(18))) ||
+	if ((cpt_feature_sgv2(pdev) && (reg_val & BIT_ULL(18))) ||
 	    is_dev_cn10ka_ax(pdev))
 		eng_grps->rid = CPT_UC_RID_CN10K_A;
-	else if (is_dev_cn10kb(pdev) || is_dev_cn10ka_b0(pdev))
+	else if (cpt_feature_sgv2(pdev))
 		eng_grps->rid = CPT_UC_RID_CN10K_B;
 }
 
-- 
2.25.1