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, 154 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mscc/ocelot_dev_gmii.h b/drivers/net/ethernet/mscc/ocelot_dev_gmii.h
new file mode 100644
index 000000000000..6aa40ea223a2
--- /dev/null
+++ b/drivers/net/ethernet/mscc/ocelot_dev_gmii.h
@@ -0,0 +1,154 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+/*
+ * Microsemi Ocelot Switch driver
+ *
+ * Copyright (c) 2017 Microsemi Corporation
+ */
+
+#ifndef _MSCC_OCELOT_DEV_GMII_H_
+#define _MSCC_OCELOT_DEV_GMII_H_
+
+#define DEV_GMII_PORT_MODE_CLOCK_CFG                      0x0
+
+#define DEV_GMII_PORT_MODE_CLOCK_CFG_MAC_TX_RST           BIT(5)
+#define DEV_GMII_PORT_MODE_CLOCK_CFG_MAC_RX_RST           BIT(4)
+#define DEV_GMII_PORT_MODE_CLOCK_CFG_PORT_RST             BIT(3)
+#define DEV_GMII_PORT_MODE_CLOCK_CFG_PHY_RST              BIT(2)
+#define DEV_GMII_PORT_MODE_CLOCK_CFG_LINK_SPEED(x)        ((x) & GENMASK(1, 0))
+#define DEV_GMII_PORT_MODE_CLOCK_CFG_LINK_SPEED_M         GENMASK(1, 0)
+
+#define DEV_GMII_PORT_MODE_PORT_MISC                      0x4
+
+#define DEV_GMII_PORT_MODE_PORT_MISC_MPLS_RX_ENA          BIT(5)
+#define DEV_GMII_PORT_MODE_PORT_MISC_FWD_ERROR_ENA        BIT(4)
+#define DEV_GMII_PORT_MODE_PORT_MISC_FWD_PAUSE_ENA        BIT(3)
+#define DEV_GMII_PORT_MODE_PORT_MISC_FWD_CTRL_ENA         BIT(2)
+#define DEV_GMII_PORT_MODE_PORT_MISC_GMII_LOOP_ENA        BIT(1)
+#define DEV_GMII_PORT_MODE_PORT_MISC_DEV_LOOP_ENA         BIT(0)
+
+#define DEV_GMII_PORT_MODE_EVENTS                         0x8
+
+#define DEV_GMII_PORT_MODE_EEE_CFG                        0xc
+
+#define DEV_GMII_PORT_MODE_EEE_CFG_EEE_ENA                BIT(22)
+#define DEV_GMII_PORT_MODE_EEE_CFG_EEE_TIMER_AGE(x)       (((x) << 15) & GENMASK(21, 15))
+#define DEV_GMII_PORT_MODE_EEE_CFG_EEE_TIMER_AGE_M        GENMASK(21, 15)
+#define DEV_GMII_PORT_MODE_EEE_CFG_EEE_TIMER_AGE_X(x)     (((x) & GENMASK(21, 15)) >> 15)
+#define DEV_GMII_PORT_MODE_EEE_CFG_EEE_TIMER_WAKEUP(x)    (((x) << 8) & GENMASK(14, 8))
+#define DEV_GMII_PORT_MODE_EEE_CFG_EEE_TIMER_WAKEUP_M     GENMASK(14, 8)
+#define DEV_GMII_PORT_MODE_EEE_CFG_EEE_TIMER_WAKEUP_X(x)  (((x) & GENMASK(14, 8)) >> 8)
+#define DEV_GMII_PORT_MODE_EEE_CFG_EEE_TIMER_HOLDOFF(x)   (((x) << 1) & GENMASK(7, 1))
+#define DEV_GMII_PORT_MODE_EEE_CFG_EEE_TIMER_HOLDOFF_M    GENMASK(7, 1)
+#define DEV_GMII_PORT_MODE_EEE_CFG_EEE_TIMER_HOLDOFF_X(x) (((x) & GENMASK(7, 1)) >> 1)
+#define DEV_GMII_PORT_MODE_EEE_CFG_PORT_LPI               BIT(0)
+
+#define DEV_GMII_PORT_MODE_RX_PATH_DELAY                  0x10
+
+#define DEV_GMII_PORT_MODE_TX_PATH_DELAY                  0x14
+
+#define DEV_GMII_PORT_MODE_PTP_PREDICT_CFG                0x18
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_ENA_CFG               0x1c
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_ENA_CFG_RX_ENA        BIT(4)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_ENA_CFG_TX_ENA        BIT(0)
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_MODE_CFG              0x20
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_MODE_CFG_FC_WORD_SYNC_ENA BIT(8)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_MODE_CFG_GIGA_MODE_ENA BIT(4)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_MODE_CFG_FDX_ENA      BIT(0)
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_MAXLEN_CFG            0x24
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_TAGS_CFG              0x28
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_TAGS_CFG_TAG_ID(x)    (((x) << 16) & GENMASK(31, 16))
+#define DEV_GMII_MAC_CFG_STATUS_MAC_TAGS_CFG_TAG_ID_M     GENMASK(31, 16)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_TAGS_CFG_TAG_ID_X(x)  (((x) & GENMASK(31, 16)) >> 16)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_TAGS_CFG_PB_ENA       BIT(1)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_TAGS_CFG_VLAN_AWR_ENA BIT(0)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_TAGS_CFG_VLAN_LEN_AWR_ENA BIT(2)
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_ADV_CHK_CFG           0x2c
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_ADV_CHK_CFG_LEN_DROP_ENA BIT(0)
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_IFG_CFG               0x30
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_IFG_CFG_RESTORE_OLD_IPG_CHECK BIT(17)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_IFG_CFG_REDUCED_TX_IFG BIT(16)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_IFG_CFG_TX_IFG(x)     (((x) << 8) & GENMASK(12, 8))
+#define DEV_GMII_MAC_CFG_STATUS_MAC_IFG_CFG_TX_IFG_M      GENMASK(12, 8)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_IFG_CFG_TX_IFG_X(x)   (((x) & GENMASK(12, 8)) >> 8)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_IFG_CFG_RX_IFG2(x)    (((x) << 4) & GENMASK(7, 4))
+#define DEV_GMII_MAC_CFG_STATUS_MAC_IFG_CFG_RX_IFG2_M     GENMASK(7, 4)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_IFG_CFG_RX_IFG2_X(x)  (((x) & GENMASK(7, 4)) >> 4)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_IFG_CFG_RX_IFG1(x)    ((x) & GENMASK(3, 0))
+#define DEV_GMII_MAC_CFG_STATUS_MAC_IFG_CFG_RX_IFG1_M     GENMASK(3, 0)
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_HDX_CFG               0x34
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_HDX_CFG_BYPASS_COL_SYNC BIT(26)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_HDX_CFG_OB_ENA        BIT(25)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_HDX_CFG_WEXC_DIS      BIT(24)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_HDX_CFG_SEED(x)       (((x) << 16) & GENMASK(23, 16))
+#define DEV_GMII_MAC_CFG_STATUS_MAC_HDX_CFG_SEED_M        GENMASK(23, 16)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_HDX_CFG_SEED_X(x)     (((x) & GENMASK(23, 16)) >> 16)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_HDX_CFG_SEED_LOAD     BIT(12)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_HDX_CFG_RETRY_AFTER_EXC_COL_ENA BIT(8)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_HDX_CFG_LATE_COL_POS(x) ((x) & GENMASK(6, 0))
+#define DEV_GMII_MAC_CFG_STATUS_MAC_HDX_CFG_LATE_COL_POS_M GENMASK(6, 0)
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_DBG_CFG               0x38
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_DBG_CFG_TBI_MODE      BIT(4)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_DBG_CFG_IFG_CRS_EXT_CHK_ENA BIT(0)
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_FC_MAC_LOW_CFG        0x3c
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_FC_MAC_HIGH_CFG       0x40
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_STICKY                0x44
+
+#define DEV_GMII_MAC_CFG_STATUS_MAC_STICKY_RX_IPG_SHRINK_STICKY BIT(9)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_STICKY_RX_PREAM_SHRINK_STICKY BIT(8)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_STICKY_RX_CARRIER_EXT_STICKY BIT(7)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_STICKY_RX_CARRIER_EXT_ERR_STICKY BIT(6)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_STICKY_RX_JUNK_STICKY BIT(5)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_STICKY_TX_RETRANSMIT_STICKY BIT(4)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_STICKY_TX_JAM_STICKY  BIT(3)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_STICKY_TX_FIFO_OFLW_STICKY BIT(2)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_STICKY_TX_FRM_LEN_OVR_STICKY BIT(1)
+#define DEV_GMII_MAC_CFG_STATUS_MAC_STICKY_TX_ABORT_STICKY BIT(0)
+
+#define DEV_GMII_MM_CONFIG_ENABLE_CONFIG                  0x48
+
+#define DEV_GMII_MM_CONFIG_ENABLE_CONFIG_MM_RX_ENA        BIT(0)
+#define DEV_GMII_MM_CONFIG_ENABLE_CONFIG_MM_TX_ENA        BIT(4)
+#define DEV_GMII_MM_CONFIG_ENABLE_CONFIG_KEEP_S_AFTER_D   BIT(8)
+
+#define DEV_GMII_MM_CONFIG_VERIF_CONFIG                   0x4c
+
+#define DEV_GMII_MM_CONFIG_VERIF_CONFIG_PRM_VERIFY_DIS    BIT(0)
+#define DEV_GMII_MM_CONFIG_VERIF_CONFIG_PRM_VERIFY_TIME(x) (((x) << 4) & GENMASK(11, 4))
+#define DEV_GMII_MM_CONFIG_VERIF_CONFIG_PRM_VERIFY_TIME_M GENMASK(11, 4)
+#define DEV_GMII_MM_CONFIG_VERIF_CONFIG_PRM_VERIFY_TIME_X(x) (((x) & GENMASK(11, 4)) >> 4)
+#define DEV_GMII_MM_CONFIG_VERIF_CONFIG_VERIF_TIMER_UNITS(x) (((x) << 12) & GENMASK(13, 12))
+#define DEV_GMII_MM_CONFIG_VERIF_CONFIG_VERIF_TIMER_UNITS_M GENMASK(13, 12)
+#define DEV_GMII_MM_CONFIG_VERIF_CONFIG_VERIF_TIMER_UNITS_X(x) (((x) & GENMASK(13, 12)) >> 12)
+
+#define DEV_GMII_MM_STATISTICS_MM_STATUS                  0x50
+
+#define DEV_GMII_MM_STATISTICS_MM_STATUS_PRMPT_ACTIVE_STATUS BIT(0)
+#define DEV_GMII_MM_STATISTICS_MM_STATUS_PRMPT_ACTIVE_STICKY BIT(4)
+#define DEV_GMII_MM_STATISTICS_MM_STATUS_PRMPT_VERIFY_STATE(x) (((x) << 8) & GENMASK(10, 8))
+#define DEV_GMII_MM_STATISTICS_MM_STATUS_PRMPT_VERIFY_STATE_M GENMASK(10, 8)
+#define DEV_GMII_MM_STATISTICS_MM_STATUS_PRMPT_VERIFY_STATE_X(x) (((x) & GENMASK(10, 8)) >> 8)
+#define DEV_GMII_MM_STATISTICS_MM_STATUS_UNEXP_RX_PFRM_STICKY BIT(12)
+#define DEV_GMII_MM_STATISTICS_MM_STATUS_UNEXP_TX_PFRM_STICKY BIT(16)
+#define DEV_GMII_MM_STATISTICS_MM_STATUS_MM_RX_FRAME_STATUS BIT(20)
+#define DEV_GMII_MM_STATISTICS_MM_STATUS_MM_TX_FRAME_STATUS BIT(24)
+#define DEV_GMII_MM_STATISTICS_MM_STATUS_MM_TX_PRMPT_STATUS BIT(28)
+
+#endif