octeontx2-af: Support for MAC address filters in CGX

This patch adds support for setting MAC address filters in CGX
for PF interfaces. Also PF interfaces can be put in promiscuous
mode. Dataplane PFs access this functionality using mailbox
messages to the AF driver.

Signed-off-by: Vidhya Raman <vraman@marvell.com>
Signed-off-by: Stanislaw Kardach <skardach@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/octeontx2/af/cgx.c

@@ -119,6 +119,81 @@ void *cgx_get_pdata(int cgx_id)
 }
 EXPORT_SYMBOL(cgx_get_pdata);
 
+static u64 mac2u64 (u8 *mac_addr)
+{
+	u64 mac = 0;
+	int index;
+
+	for (index = ETH_ALEN - 1; index >= 0; index--)
+		mac |= ((u64)*mac_addr++) << (8 * index);
+	return mac;
+}
+
+int cgx_lmac_addr_set(u8 cgx_id, u8 lmac_id, u8 *mac_addr)
+{
+	struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
+	u64 cfg;
+
+	/* copy 6bytes from macaddr */
+	/* memcpy(&cfg, mac_addr, 6); */
+
+	cfg = mac2u64 (mac_addr);
+
+	cgx_write(cgx_dev, 0, (CGXX_CMRX_RX_DMAC_CAM0 + (lmac_id * 0x8)),
+		  cfg | CGX_DMAC_CAM_ADDR_ENABLE | ((u64)lmac_id << 49));
+
+	cfg = cgx_read(cgx_dev, lmac_id, CGXX_CMRX_RX_DMAC_CTL0);
+	cfg |= CGX_DMAC_CTL0_CAM_ENABLE;
+	cgx_write(cgx_dev, lmac_id, CGXX_CMRX_RX_DMAC_CTL0, cfg);
+
+	return 0;
+}
+EXPORT_SYMBOL(cgx_lmac_addr_set);
+
+u64 cgx_lmac_addr_get(u8 cgx_id, u8 lmac_id)
+{
+	struct cgx *cgx_dev = cgx_get_pdata(cgx_id);
+	u64 cfg;
+
+	cfg = cgx_read(cgx_dev, 0, CGXX_CMRX_RX_DMAC_CAM0 + lmac_id * 0x8);
+	return cfg & CGX_RX_DMAC_ADR_MASK;
+}
+EXPORT_SYMBOL(cgx_lmac_addr_get);
+
+void cgx_lmac_promisc_config(int cgx_id, int lmac_id, bool enable)
+{
+	struct cgx *cgx = cgx_get_pdata(cgx_id);
+	u64 cfg = 0;
+
+	if (!cgx)
+		return;
+
+	if (enable) {
+		/* Enable promiscuous mode on LMAC */
+		cfg = cgx_read(cgx, lmac_id, CGXX_CMRX_RX_DMAC_CTL0);
+		cfg &= ~(CGX_DMAC_CAM_ACCEPT | CGX_DMAC_MCAST_MODE);
+		cfg |= CGX_DMAC_BCAST_MODE;
+		cgx_write(cgx, lmac_id, CGXX_CMRX_RX_DMAC_CTL0, cfg);
+
+		cfg = cgx_read(cgx, 0,
+			       (CGXX_CMRX_RX_DMAC_CAM0 + lmac_id * 0x8));
+		cfg &= ~CGX_DMAC_CAM_ADDR_ENABLE;
+		cgx_write(cgx, 0,
+			  (CGXX_CMRX_RX_DMAC_CAM0 + lmac_id * 0x8), cfg);
+	} else {
+		/* Disable promiscuous mode */
+		cfg = cgx_read(cgx, lmac_id, CGXX_CMRX_RX_DMAC_CTL0);
+		cfg |= CGX_DMAC_CAM_ACCEPT | CGX_DMAC_MCAST_MODE;
+		cgx_write(cgx, lmac_id, CGXX_CMRX_RX_DMAC_CTL0, cfg);
+		cfg = cgx_read(cgx, 0,
+			       (CGXX_CMRX_RX_DMAC_CAM0 + lmac_id * 0x8));
+		cfg |= CGX_DMAC_CAM_ADDR_ENABLE;
+		cgx_write(cgx, 0,
+			  (CGXX_CMRX_RX_DMAC_CAM0 + lmac_id * 0x8), cfg);
+	}
+}
+EXPORT_SYMBOL(cgx_lmac_promisc_config);
+
 int cgx_get_rx_stats(void *cgxd, int lmac_id, int idx, u64 *rx_stat)
 {
 	struct cgx *cgx = cgxd;

drivers/net/ethernet/marvell/octeontx2/af/cgx.h

@@ -34,6 +34,15 @@
 #define CGXX_CMRX_RX_ID_MAP		0x060
 #define CGXX_CMRX_RX_STAT0		0x070
 #define CGXX_CMRX_RX_LMACS		0x128
+#define CGXX_CMRX_RX_DMAC_CTL0		0x1F8
+#define  CGX_DMAC_CTL0_CAM_ENABLE		BIT_ULL(3)
+#define  CGX_DMAC_CAM_ACCEPT			BIT_ULL(3)
+#define  CGX_DMAC_MCAST_MODE			BIT_ULL(1)
+#define  CGX_DMAC_BCAST_MODE			BIT_ULL(0)
+#define CGXX_CMRX_RX_DMAC_CAM0		0x200
+#define  CGX_DMAC_CAM_ADDR_ENABLE		BIT_ULL(48)
+#define CGXX_CMRX_RX_DMAC_CAM1		0x400
+#define CGX_RX_DMAC_ADR_MASK			GENMASK_ULL(47, 0)
 #define CGXX_CMRX_TX_STAT0		0x700
 #define CGXX_SCRATCH0_REG		0x1050
 #define CGXX_SCRATCH1_REG		0x1058
@@ -71,4 +80,7 @@ int cgx_lmac_evh_register(struct cgx_event_cb *cb, void *cgxd, int lmac_id);
 int cgx_get_tx_stats(void *cgxd, int lmac_id, int idx, u64 *tx_stat);
 int cgx_get_rx_stats(void *cgxd, int lmac_id, int idx, u64 *rx_stat);
 int cgx_lmac_rx_tx_enable(void *cgxd, int lmac_id, bool enable);
+int cgx_lmac_addr_set(u8 cgx_id, u8 lmac_id, u8 *mac_addr);
+u64 cgx_lmac_addr_get(u8 cgx_id, u8 lmac_id);
+void cgx_lmac_promisc_config(int cgx_id, int lmac_id, bool enable);
 #endif /* CGX_H */

drivers/net/ethernet/marvell/octeontx2/af/mbox.h

@@ -127,6 +127,12 @@ M(MSIX_OFFSET,		0x004, msg_req, msix_offset_rsp)		\
 M(CGX_START_RXTX,	0x200, msg_req, msg_rsp)			\
 M(CGX_STOP_RXTX,	0x201, msg_req, msg_rsp)			\
 M(CGX_STATS,		0x202, msg_req, cgx_stats_rsp)			\
+M(CGX_MAC_ADDR_SET,	0x203, cgx_mac_addr_set_or_get,			\
+				cgx_mac_addr_set_or_get)		\
+M(CGX_MAC_ADDR_GET,	0x204, cgx_mac_addr_set_or_get,			\
+				cgx_mac_addr_set_or_get)		\
+M(CGX_PROMISC_ENABLE,	0x205, msg_req, msg_rsp)			\
+M(CGX_PROMISC_DISABLE,	0x206, msg_req, msg_rsp)			\
 /* NPA mbox IDs (range 0x400 - 0x5FF) */				\
 /* SSO/SSOW mbox IDs (range 0x600 - 0x7FF) */				\
 /* TIM mbox IDs (range 0x800 - 0x9FF) */				\
@@ -221,4 +227,11 @@ struct cgx_stats_rsp {
 	u64 tx_stats[CGX_TX_STATS_COUNT];
 };
 
+/* Structure for requesting the operation for
+ * setting/getting mac address in the CGX interface
+ */
+struct cgx_mac_addr_set_or_get {
+	struct mbox_msghdr hdr;
+	u8 mac_addr[ETH_ALEN];
+};
 #endif /* MBOX_H */

drivers/net/ethernet/marvell/octeontx2/af/rvu.h

@@ -173,4 +173,14 @@ int rvu_mbox_handler_CGX_STOP_RXTX(struct rvu *rvu, struct msg_req *req,
 				   struct msg_rsp *rsp);
 int rvu_mbox_handler_CGX_STATS(struct rvu *rvu, struct msg_req *req,
 			       struct cgx_stats_rsp *rsp);
+int rvu_mbox_handler_CGX_MAC_ADDR_SET(struct rvu *rvu,
+				      struct cgx_mac_addr_set_or_get *req,
+				      struct cgx_mac_addr_set_or_get *rsp);
+int rvu_mbox_handler_CGX_MAC_ADDR_GET(struct rvu *rvu,
+				      struct cgx_mac_addr_set_or_get *req,
+				      struct cgx_mac_addr_set_or_get *rsp);
+int rvu_mbox_handler_CGX_PROMISC_ENABLE(struct rvu *rvu, struct msg_req *req,
+					struct msg_rsp *rsp);
+int rvu_mbox_handler_CGX_PROMISC_DISABLE(struct rvu *rvu, struct msg_req *req,
+					 struct msg_rsp *rsp);
 #endif /* RVU_H */

drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c

@@ -261,3 +261,76 @@ int rvu_mbox_handler_CGX_STATS(struct rvu *rvu, struct msg_req *req,
 	}
 	return 0;
 }
+
+int rvu_mbox_handler_CGX_MAC_ADDR_SET(struct rvu *rvu,
+				      struct cgx_mac_addr_set_or_get *req,
+				      struct cgx_mac_addr_set_or_get *rsp)
+{
+	int pf = rvu_get_pf(req->hdr.pcifunc);
+	u8 cgx_id, lmac_id;
+
+	rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
+
+	cgx_lmac_addr_set(cgx_id, lmac_id, req->mac_addr);
+
+	return 0;
+}
+
+int rvu_mbox_handler_CGX_MAC_ADDR_GET(struct rvu *rvu,
+				      struct cgx_mac_addr_set_or_get *req,
+				      struct cgx_mac_addr_set_or_get *rsp)
+{
+	int pf = rvu_get_pf(req->hdr.pcifunc);
+	u8 cgx_id, lmac_id;
+	int rc = 0, i;
+	u64 cfg;
+
+	rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
+
+	rsp->hdr.rc = rc;
+	cfg = cgx_lmac_addr_get(cgx_id, lmac_id);
+	/* copy 48 bit mac address to req->mac_addr */
+	for (i = 0; i < ETH_ALEN; i++)
+		rsp->mac_addr[i] = cfg >> (ETH_ALEN - 1 - i) * 8;
+	return 0;
+}
+
+int rvu_mbox_handler_CGX_PROMISC_ENABLE(struct rvu *rvu, struct msg_req *req,
+					struct msg_rsp *rsp)
+{
+	u16 pcifunc = req->hdr.pcifunc;
+	int pf = rvu_get_pf(pcifunc);
+	u8 cgx_id, lmac_id;
+
+	/* This msg is expected only from PFs that are mapped to CGX LMACs,
+	 * if received from other PF/VF simply ACK, nothing to do.
+	 */
+	if ((req->hdr.pcifunc & RVU_PFVF_FUNC_MASK) ||
+	    !is_pf_cgxmapped(rvu, pf))
+		return -ENODEV;
+
+	rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
+
+	cgx_lmac_promisc_config(cgx_id, lmac_id, true);
+	return 0;
+}
+
+int rvu_mbox_handler_CGX_PROMISC_DISABLE(struct rvu *rvu, struct msg_req *req,
+					 struct msg_rsp *rsp)
+{
+	u16 pcifunc = req->hdr.pcifunc;
+	int pf = rvu_get_pf(pcifunc);
+	u8 cgx_id, lmac_id;
+
+	/* This msg is expected only from PFs that are mapped to CGX LMACs,
+	 * if received from other PF/VF simply ACK, nothing to do.
+	 */
+	if ((req->hdr.pcifunc & RVU_PFVF_FUNC_MASK) ||
+	    !is_pf_cgxmapped(rvu, pf))
+		return -ENODEV;
+
+	rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
+
+	cgx_lmac_promisc_config(cgx_id, lmac_id, false);
+	return 0;
+}