net: mscc: Add initial Ocelot switch support

Add a driver for Microsemi Ocelot Ethernet switch support.

This makes two modules:
mscc_ocelot_common handles all the common features that doesn't depend on
how the switch is integrated in the SoC. Currently, it handles offloading
bridging to the hardware. ocelot_io.c handles register accesses. This is
unfortunately needed because the register layout is packed and then depends
on the number of ports available on the switch. The register definition
files are automatically generated.

ocelot_board handles the switch integration on the SoC and on the board.

Frame injection and extraction to/from the CPU port is currently done using
register accesses which is quite slow. DMA is possible but the port is not
able to absorb the whole switch bandwidth.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 81 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mscc/ocelot_rew.h b/drivers/net/ethernet/mscc/ocelot_rew.h
new file mode 100644
index 000000000000..210914b7e20f
--- /dev/null
+++ b/drivers/net/ethernet/mscc/ocelot_rew.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+/*
+ * Microsemi Ocelot Switch driver
+ *
+ * Copyright (c) 2017 Microsemi Corporation
+ */
+
+#ifndef _MSCC_OCELOT_REW_H_
+#define _MSCC_OCELOT_REW_H_
+
+#define REW_PORT_VLAN_CFG_GSZ                             0x80
+
+#define REW_PORT_VLAN_CFG_PORT_TPID(x)                    (((x) << 16) & GENMASK(31, 16))
+#define REW_PORT_VLAN_CFG_PORT_TPID_M                     GENMASK(31, 16)
+#define REW_PORT_VLAN_CFG_PORT_TPID_X(x)                  (((x) & GENMASK(31, 16)) >> 16)
+#define REW_PORT_VLAN_CFG_PORT_DEI                        BIT(15)
+#define REW_PORT_VLAN_CFG_PORT_PCP(x)                     (((x) << 12) & GENMASK(14, 12))
+#define REW_PORT_VLAN_CFG_PORT_PCP_M                      GENMASK(14, 12)
+#define REW_PORT_VLAN_CFG_PORT_PCP_X(x)                   (((x) & GENMASK(14, 12)) >> 12)
+#define REW_PORT_VLAN_CFG_PORT_VID(x)                     ((x) & GENMASK(11, 0))
+#define REW_PORT_VLAN_CFG_PORT_VID_M                      GENMASK(11, 0)
+
+#define REW_TAG_CFG_GSZ                                   0x80
+
+#define REW_TAG_CFG_TAG_CFG(x)                            (((x) << 7) & GENMASK(8, 7))
+#define REW_TAG_CFG_TAG_CFG_M                             GENMASK(8, 7)
+#define REW_TAG_CFG_TAG_CFG_X(x)                          (((x) & GENMASK(8, 7)) >> 7)
+#define REW_TAG_CFG_TAG_TPID_CFG(x)                       (((x) << 5) & GENMASK(6, 5))
+#define REW_TAG_CFG_TAG_TPID_CFG_M                        GENMASK(6, 5)
+#define REW_TAG_CFG_TAG_TPID_CFG_X(x)                     (((x) & GENMASK(6, 5)) >> 5)
+#define REW_TAG_CFG_TAG_VID_CFG                           BIT(4)
+#define REW_TAG_CFG_TAG_PCP_CFG(x)                        (((x) << 2) & GENMASK(3, 2))
+#define REW_TAG_CFG_TAG_PCP_CFG_M                         GENMASK(3, 2)
+#define REW_TAG_CFG_TAG_PCP_CFG_X(x)                      (((x) & GENMASK(3, 2)) >> 2)
+#define REW_TAG_CFG_TAG_DEI_CFG(x)                        ((x) & GENMASK(1, 0))
+#define REW_TAG_CFG_TAG_DEI_CFG_M                         GENMASK(1, 0)
+
+#define REW_PORT_CFG_GSZ                                  0x80
+
+#define REW_PORT_CFG_ES0_EN                               BIT(5)
+#define REW_PORT_CFG_FCS_UPDATE_NONCPU_CFG(x)             (((x) << 3) & GENMASK(4, 3))
+#define REW_PORT_CFG_FCS_UPDATE_NONCPU_CFG_M              GENMASK(4, 3)
+#define REW_PORT_CFG_FCS_UPDATE_NONCPU_CFG_X(x)           (((x) & GENMASK(4, 3)) >> 3)
+#define REW_PORT_CFG_FCS_UPDATE_CPU_ENA                   BIT(2)
+#define REW_PORT_CFG_FLUSH_ENA                            BIT(1)
+#define REW_PORT_CFG_AGE_DIS                              BIT(0)
+
+#define REW_DSCP_CFG_GSZ                                  0x80
+
+#define REW_PCP_DEI_QOS_MAP_CFG_GSZ                       0x80
+#define REW_PCP_DEI_QOS_MAP_CFG_RSZ                       0x4
+
+#define REW_PCP_DEI_QOS_MAP_CFG_DEI_QOS_VAL               BIT(3)
+#define REW_PCP_DEI_QOS_MAP_CFG_PCP_QOS_VAL(x)            ((x) & GENMASK(2, 0))
+#define REW_PCP_DEI_QOS_MAP_CFG_PCP_QOS_VAL_M             GENMASK(2, 0)
+
+#define REW_PTP_CFG_GSZ                                   0x80
+
+#define REW_PTP_CFG_PTP_BACKPLANE_MODE                    BIT(7)
+#define REW_PTP_CFG_GP_CFG_UNUSED(x)                      (((x) << 3) & GENMASK(6, 3))
+#define REW_PTP_CFG_GP_CFG_UNUSED_M                       GENMASK(6, 3)
+#define REW_PTP_CFG_GP_CFG_UNUSED_X(x)                    (((x) & GENMASK(6, 3)) >> 3)
+#define REW_PTP_CFG_PTP_1STEP_DIS                         BIT(2)
+#define REW_PTP_CFG_PTP_2STEP_DIS                         BIT(1)
+#define REW_PTP_CFG_PTP_UDP_KEEP                          BIT(0)
+
+#define REW_PTP_DLY1_CFG_GSZ                              0x80
+
+#define REW_RED_TAG_CFG_GSZ                               0x80
+
+#define REW_RED_TAG_CFG_RED_TAG_CFG                       BIT(0)
+
+#define REW_DSCP_REMAP_DP1_CFG_RSZ                        0x4
+
+#define REW_DSCP_REMAP_CFG_RSZ                            0x4
+
+#define REW_REW_STICKY_ES0_TAGB_PUSH_FAILED               BIT(0)
+
+#define REW_PPT_RSZ                                       0x4
+
+#endif