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Subject[PATCH net-next 12/13] octeontx2-af: Add new mbox messages to retrieve MCAM entries
Date
This patch introduces new mailbox mesages to retrieve a given
MCAM entry or base flow steering rule of a VF installed by its
parent PF. This helps while updating the existing MCAM rules
with out re-framing the whole mailbox request again. The INSTALL
FLOW mailbox consumer can read-modify-write the existing entry.
Similarly while installing new flow rules for a VF, the base
flow steering rule match creteria is copied to the new flow rule
and the deltas are appended to the new rule.

Signed-off-by: Naveen Mamindlapalli <naveenm@marvell.com>
Co-developed-by: Vamsi Attunuru <vattunuru@marvell.com>
Signed-off-by: Vamsi Attunuru <vattunuru@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
---
drivers/net/ethernet/marvell/octeontx2/af/mbox.h | 22 +++++++
.../net/ethernet/marvell/octeontx2/af/rvu_npc.c | 70 ++++++++++++++++++++++
2 files changed, 92 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
index fd204e1a7b8a..cc8c463b7bf3 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
+++ b/drivers/net/ethernet/marvell/octeontx2/af/mbox.h
@@ -192,6 +192,11 @@ M(NPC_INSTALL_FLOW, 0x600d, npc_install_flow, \
npc_install_flow_req, npc_install_flow_rsp) \
M(NPC_DELETE_FLOW, 0x600e, npc_delete_flow, \
npc_delete_flow_req, msg_rsp) \
+M(NPC_MCAM_READ_ENTRY, 0x600f, npc_mcam_read_entry, \
+ npc_mcam_read_entry_req, \
+ npc_mcam_read_entry_rsp) \
+M(NPC_MCAM_READ_BASE_RULE, 0x6011, npc_read_base_steer_rule, \
+ msg_req, npc_mcam_read_base_rule_rsp) \
/* NIX mbox IDs (range 0x8000 - 0xFFFF) */ \
M(NIX_LF_ALLOC, 0x8000, nix_lf_alloc, \
nix_lf_alloc_req, nix_lf_alloc_rsp) \
@@ -1028,6 +1033,23 @@ struct npc_delete_flow_req {
u8 all; /* PF + VFs */
};

+struct npc_mcam_read_entry_req {
+ struct mbox_msghdr hdr;
+ u16 entry; /* MCAM entry to read */
+};
+
+struct npc_mcam_read_entry_rsp {
+ struct mbox_msghdr hdr;
+ struct mcam_entry entry_data;
+ u8 intf;
+ u8 enable;
+};
+
+struct npc_mcam_read_base_rule_rsp {
+ struct mbox_msghdr hdr;
+ struct mcam_entry entry;
+};
+
enum ptp_op {
PTP_OP_ADJFINE = 0,
PTP_OP_GET_CLOCK = 1,
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index c87d06ee11c3..52e23e68d917 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -2194,6 +2194,30 @@ int rvu_mbox_handler_npc_mcam_free_entry(struct rvu *rvu,
return rc;
}

+int rvu_mbox_handler_npc_mcam_read_entry(struct rvu *rvu,
+ struct npc_mcam_read_entry_req *req,
+ struct npc_mcam_read_entry_rsp *rsp)
+{
+ struct npc_mcam *mcam = &rvu->hw->mcam;
+ u16 pcifunc = req->hdr.pcifunc;
+ int blkaddr, rc;
+
+ blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
+ if (blkaddr < 0)
+ return NPC_MCAM_INVALID_REQ;
+
+ mutex_lock(&mcam->lock);
+ rc = npc_mcam_verify_entry(mcam, pcifunc, req->entry);
+ if (!rc) {
+ npc_read_mcam_entry(rvu, mcam, blkaddr, req->entry,
+ &rsp->entry_data,
+ &rsp->intf, &rsp->enable);
+ }
+
+ mutex_unlock(&mcam->lock);
+ return rc;
+}
+
int rvu_mbox_handler_npc_mcam_write_entry(struct rvu *rvu,
struct npc_mcam_write_entry_req *req,
struct msg_rsp *rsp)
@@ -2754,3 +2778,49 @@ bool rvu_npc_write_default_rule(struct rvu *rvu, int blkaddr, int nixlf,

return enable;
}
+
+int rvu_mbox_handler_npc_read_base_steer_rule(struct rvu *rvu,
+ struct msg_req *req,
+ struct npc_mcam_read_base_rule_rsp *rsp)
+{
+ struct npc_mcam *mcam = &rvu->hw->mcam;
+ int index, blkaddr, nixlf, rc = 0;
+ u16 pcifunc = req->hdr.pcifunc;
+ struct rvu_pfvf *pfvf;
+ u8 intf, enable;
+
+ blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
+ if (blkaddr < 0)
+ return NPC_MCAM_INVALID_REQ;
+
+ /* Return the channel number in case of PF */
+ if (!(pcifunc & RVU_PFVF_FUNC_MASK)) {
+ pfvf = rvu_get_pfvf(rvu, pcifunc);
+ rsp->entry.kw[0] = pfvf->rx_chan_base;
+ rsp->entry.kw_mask[0] = 0xFFFULL;
+ goto out;
+ }
+
+ /* Find the pkt steering rule installed by PF to this VF */
+ mutex_lock(&mcam->lock);
+ for (index = 0; index < mcam->bmap_entries; index++) {
+ if (mcam->entry2target_pffunc[index] == pcifunc)
+ goto read_entry;
+ }
+
+ rc = nix_get_nixlf(rvu, pcifunc, &nixlf, NULL);
+ if (rc < 0) {
+ mutex_unlock(&mcam->lock);
+ goto out;
+ }
+ /* Read the default ucast entry if there is no pkt steering rule */
+ index = npc_get_nixlf_mcam_index(mcam, pcifunc, nixlf,
+ NIXLF_UCAST_ENTRY);
+read_entry:
+ /* Read the mcam entry */
+ npc_read_mcam_entry(rvu, mcam, blkaddr, index, &rsp->entry, &intf,
+ &enable);
+ mutex_unlock(&mcam->lock);
+out:
+ return rc;
+}
--
2.16.5
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