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alistair23-linux/drivers/net/ethernet/altera/altera_tse.h
Neill Whillans 3b80456433 net: ethernet: altera_tse: add support for SGMII PCS 
Add support for the (optional) SGMII PCS functionality of the Altera
TSE MAC. If the phy-mode is set to 'sgmii' then we attempt to discover
and initialise the PCS so that the MAC can communicate to the PHY.

The PCS IP block provides a scratch register for testing presence of
the PCS, which is mapped into one of the two MDIO spaces present in
the MAC's register space.  Once we have determined that the scratch
register is functioning, we attempt to initialise the PCS to
auto-negotiate an SGMII link with the PHY. There is no need to monitor
or manage the SGMII link beyond this, since the normal PHY MDIO will
then be used to monitor the media layer.

The Altera TSE MAC has only one way in which it can be configured with an
SGMII PCS, and as such, this patch only looks to the phy-mode to select
whether or not to attempt to initialise the PCS registers.  During
initialisation, we report the PCS's equivalent of a PHY ID register.
This can be parameterised during the IP instantiation and is often left
as '0x00000000' which is not an error.

Signed-off-by: Neill Whillans <neill.whillans@codethink.co.uk>
Reviewed-by: Daniel Silverstone <daniel.silverstone@codethink.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-02 10:36:47 -05:00

546 lines
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/* Altera Triple-Speed Ethernet MAC driver
* Copyright (C) 2008-2014 Altera Corporation. All rights reserved
*
* Contributors:
* Dalon Westergreen
* Thomas Chou
* Ian Abbott
* Yuriy Kozlov
* Tobias Klauser
* Andriy Smolskyy
* Roman Bulgakov
* Dmytro Mytarchuk
* Matthew Gerlach
*
* Original driver contributed by SLS.
* Major updates contributed by GlobalLogic
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ALTERA_TSE_H__
#define __ALTERA_TSE_H__
#define ALTERA_TSE_RESOURCE_NAME "altera_tse"
#include <linux/bitops.h>
#include <linux/if_vlan.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
#define ALTERA_TSE_SW_RESET_WATCHDOG_CNTR 10000
#define ALTERA_TSE_MAC_FIFO_WIDTH 4 /* TX/RX FIFO width in
* bytes
*/
/* Rx FIFO default settings */
#define ALTERA_TSE_RX_SECTION_EMPTY 16
#define ALTERA_TSE_RX_SECTION_FULL 0
#define ALTERA_TSE_RX_ALMOST_EMPTY 8
#define ALTERA_TSE_RX_ALMOST_FULL 8
/* Tx FIFO default settings */
#define ALTERA_TSE_TX_SECTION_EMPTY 16
#define ALTERA_TSE_TX_SECTION_FULL 0
#define ALTERA_TSE_TX_ALMOST_EMPTY 8
#define ALTERA_TSE_TX_ALMOST_FULL 3
/* MAC function configuration default settings */
#define ALTERA_TSE_TX_IPG_LENGTH 12
#define ALTERA_TSE_PAUSE_QUANTA 0xffff
#define GET_BIT_VALUE(v, bit) (((v) >> (bit)) & 0x1)
/* MAC Command_Config Register Bit Definitions
*/
#define MAC_CMDCFG_TX_ENA BIT(0)
#define MAC_CMDCFG_RX_ENA BIT(1)
#define MAC_CMDCFG_XON_GEN BIT(2)
#define MAC_CMDCFG_ETH_SPEED BIT(3)
#define MAC_CMDCFG_PROMIS_EN BIT(4)
#define MAC_CMDCFG_PAD_EN BIT(5)
#define MAC_CMDCFG_CRC_FWD BIT(6)
#define MAC_CMDCFG_PAUSE_FWD BIT(7)
#define MAC_CMDCFG_PAUSE_IGNORE BIT(8)
#define MAC_CMDCFG_TX_ADDR_INS BIT(9)
#define MAC_CMDCFG_HD_ENA BIT(10)
#define MAC_CMDCFG_EXCESS_COL BIT(11)
#define MAC_CMDCFG_LATE_COL BIT(12)
#define MAC_CMDCFG_SW_RESET BIT(13)
#define MAC_CMDCFG_MHASH_SEL BIT(14)
#define MAC_CMDCFG_LOOP_ENA BIT(15)
#define MAC_CMDCFG_TX_ADDR_SEL(v) (((v) & 0x7) << 16)
#define MAC_CMDCFG_MAGIC_ENA BIT(19)
#define MAC_CMDCFG_SLEEP BIT(20)
#define MAC_CMDCFG_WAKEUP BIT(21)
#define MAC_CMDCFG_XOFF_GEN BIT(22)
#define MAC_CMDCFG_CNTL_FRM_ENA BIT(23)
#define MAC_CMDCFG_NO_LGTH_CHECK BIT(24)
#define MAC_CMDCFG_ENA_10 BIT(25)
#define MAC_CMDCFG_RX_ERR_DISC BIT(26)
#define MAC_CMDCFG_DISABLE_READ_TIMEOUT BIT(27)
#define MAC_CMDCFG_CNT_RESET BIT(31)
#define MAC_CMDCFG_TX_ENA_GET(v) GET_BIT_VALUE(v, 0)
#define MAC_CMDCFG_RX_ENA_GET(v) GET_BIT_VALUE(v, 1)
#define MAC_CMDCFG_XON_GEN_GET(v) GET_BIT_VALUE(v, 2)
#define MAC_CMDCFG_ETH_SPEED_GET(v) GET_BIT_VALUE(v, 3)
#define MAC_CMDCFG_PROMIS_EN_GET(v) GET_BIT_VALUE(v, 4)
#define MAC_CMDCFG_PAD_EN_GET(v) GET_BIT_VALUE(v, 5)
#define MAC_CMDCFG_CRC_FWD_GET(v) GET_BIT_VALUE(v, 6)
#define MAC_CMDCFG_PAUSE_FWD_GET(v) GET_BIT_VALUE(v, 7)
#define MAC_CMDCFG_PAUSE_IGNORE_GET(v) GET_BIT_VALUE(v, 8)
#define MAC_CMDCFG_TX_ADDR_INS_GET(v) GET_BIT_VALUE(v, 9)
#define MAC_CMDCFG_HD_ENA_GET(v) GET_BIT_VALUE(v, 10)
#define MAC_CMDCFG_EXCESS_COL_GET(v) GET_BIT_VALUE(v, 11)
#define MAC_CMDCFG_LATE_COL_GET(v) GET_BIT_VALUE(v, 12)
#define MAC_CMDCFG_SW_RESET_GET(v) GET_BIT_VALUE(v, 13)
#define MAC_CMDCFG_MHASH_SEL_GET(v) GET_BIT_VALUE(v, 14)
#define MAC_CMDCFG_LOOP_ENA_GET(v) GET_BIT_VALUE(v, 15)
#define MAC_CMDCFG_TX_ADDR_SEL_GET(v) (((v) >> 16) & 0x7)
#define MAC_CMDCFG_MAGIC_ENA_GET(v) GET_BIT_VALUE(v, 19)
#define MAC_CMDCFG_SLEEP_GET(v) GET_BIT_VALUE(v, 20)
#define MAC_CMDCFG_WAKEUP_GET(v) GET_BIT_VALUE(v, 21)
#define MAC_CMDCFG_XOFF_GEN_GET(v) GET_BIT_VALUE(v, 22)
#define MAC_CMDCFG_CNTL_FRM_ENA_GET(v) GET_BIT_VALUE(v, 23)
#define MAC_CMDCFG_NO_LGTH_CHECK_GET(v) GET_BIT_VALUE(v, 24)
#define MAC_CMDCFG_ENA_10_GET(v) GET_BIT_VALUE(v, 25)
#define MAC_CMDCFG_RX_ERR_DISC_GET(v) GET_BIT_VALUE(v, 26)
#define MAC_CMDCFG_DISABLE_READ_TIMEOUT_GET(v) GET_BIT_VALUE(v, 27)
#define MAC_CMDCFG_CNT_RESET_GET(v) GET_BIT_VALUE(v, 31)
/* SGMII PCS register addresses
*/
#define SGMII_PCS_SCRATCH 0x10
#define SGMII_PCS_REV 0x11
#define SGMII_PCS_LINK_TIMER_0 0x12
#define SGMII_PCS_LINK_TIMER_1 0x13
#define SGMII_PCS_IF_MODE 0x14
#define SGMII_PCS_DIS_READ_TO 0x15
#define SGMII_PCS_READ_TO 0x16
#define SGMII_PCS_SW_RESET_TIMEOUT 100 /* usecs */
/* MDIO registers within MAC register Space
*/
struct altera_tse_mdio {
u32 control; /* PHY device operation control register */
u32 status; /* PHY device operation status register */
u32 phy_id1; /* Bits 31:16 of PHY identifier */
u32 phy_id2; /* Bits 15:0 of PHY identifier */
u32 auto_negotiation_advertisement; /* Auto-negotiation
* advertisement
* register
*/
u32 remote_partner_base_page_ability;
u32 reg6;
u32 reg7;
u32 reg8;
u32 reg9;
u32 rega;
u32 regb;
u32 regc;
u32 regd;
u32 rege;
u32 regf;
u32 reg10;
u32 reg11;
u32 reg12;
u32 reg13;
u32 reg14;
u32 reg15;
u32 reg16;
u32 reg17;
u32 reg18;
u32 reg19;
u32 reg1a;
u32 reg1b;
u32 reg1c;
u32 reg1d;
u32 reg1e;
u32 reg1f;
};
/* MAC register Space. Note that some of these registers may or may not be
* present depending upon options chosen by the user when the core was
* configured and built. Please consult the Altera Triple Speed Ethernet User
* Guide for details.
*/
struct altera_tse_mac {
/* Bits 15:0: MegaCore function revision (0x0800). Bit 31:16: Customer
* specific revision
*/
u32 megacore_revision;
/* Provides a memory location for user applications to test the device
* memory operation.
*/
u32 scratch_pad;
/* The host processor uses this register to control and configure the
* MAC block
*/
u32 command_config;
/* 32-bit primary MAC address word 0 bits 0 to 31 of the primary
* MAC address
*/
u32 mac_addr_0;
/* 32-bit primary MAC address word 1 bits 32 to 47 of the primary
* MAC address
*/
u32 mac_addr_1;
/* 14-bit maximum frame length. The MAC receive logic */
u32 frm_length;
/* The pause quanta is used in each pause frame sent to a remote
* Ethernet device, in increments of 512 Ethernet bit times
*/
u32 pause_quanta;
/* 12-bit receive FIFO section-empty threshold */
u32 rx_section_empty;
/* 12-bit receive FIFO section-full threshold */
u32 rx_section_full;
/* 12-bit transmit FIFO section-empty threshold */
u32 tx_section_empty;
/* 12-bit transmit FIFO section-full threshold */
u32 tx_section_full;
/* 12-bit receive FIFO almost-empty threshold */
u32 rx_almost_empty;
/* 12-bit receive FIFO almost-full threshold */
u32 rx_almost_full;
/* 12-bit transmit FIFO almost-empty threshold */
u32 tx_almost_empty;
/* 12-bit transmit FIFO almost-full threshold */
u32 tx_almost_full;
/* MDIO address of PHY Device 0. Bits 0 to 4 hold a 5-bit PHY address */
u32 mdio_phy0_addr;
/* MDIO address of PHY Device 1. Bits 0 to 4 hold a 5-bit PHY address */
u32 mdio_phy1_addr;
/* Bit[15:0]—16-bit holdoff quanta */
u32 holdoff_quant;
/* only if 100/1000 BaseX PCS, reserved otherwise */
u32 reserved1[5];
/* Minimum IPG between consecutive transmit frame in terms of bytes */
u32 tx_ipg_length;
/* IEEE 802.3 oEntity Managed Object Support */
/* The MAC addresses */
u32 mac_id_1;
u32 mac_id_2;
/* Number of frames transmitted without error including pause frames */
u32 frames_transmitted_ok;
/* Number of frames received without error including pause frames */
u32 frames_received_ok;
/* Number of frames received with a CRC error */
u32 frames_check_sequence_errors;
/* Frame received with an alignment error */
u32 alignment_errors;
/* Sum of payload and padding octets of frames transmitted without
* error
*/
u32 octets_transmitted_ok;
/* Sum of payload and padding octets of frames received without error */
u32 octets_received_ok;
/* IEEE 802.3 oPausedEntity Managed Object Support */
/* Number of transmitted pause frames */
u32 tx_pause_mac_ctrl_frames;
/* Number of Received pause frames */
u32 rx_pause_mac_ctrl_frames;
/* IETF MIB (MIB-II) Object Support */
/* Number of frames received with error */
u32 if_in_errors;
/* Number of frames transmitted with error */
u32 if_out_errors;
/* Number of valid received unicast frames */
u32 if_in_ucast_pkts;
/* Number of valid received multicasts frames (without pause) */
u32 if_in_multicast_pkts;
/* Number of valid received broadcast frames */
u32 if_in_broadcast_pkts;
u32 if_out_discards;
/* The number of valid unicast frames transmitted */
u32 if_out_ucast_pkts;
/* The number of valid multicast frames transmitted,
* excluding pause frames
*/
u32 if_out_multicast_pkts;
u32 if_out_broadcast_pkts;
/* IETF RMON MIB Object Support */
/* Counts the number of dropped packets due to internal errors
* of the MAC client.
*/
u32 ether_stats_drop_events;
/* Total number of bytes received. Good and bad frames. */
u32 ether_stats_octets;
/* Total number of packets received. Counts good and bad packets. */
u32 ether_stats_pkts;
/* Number of packets received with less than 64 bytes. */
u32 ether_stats_undersize_pkts;
/* The number of frames received that are longer than the
* value configured in the frm_length register
*/
u32 ether_stats_oversize_pkts;
/* Number of received packet with 64 bytes */
u32 ether_stats_pkts_64_octets;
/* Frames (good and bad) with 65 to 127 bytes */
u32 ether_stats_pkts_65to127_octets;
/* Frames (good and bad) with 128 to 255 bytes */
u32 ether_stats_pkts_128to255_octets;
/* Frames (good and bad) with 256 to 511 bytes */
u32 ether_stats_pkts_256to511_octets;
/* Frames (good and bad) with 512 to 1023 bytes */
u32 ether_stats_pkts_512to1023_octets;
/* Frames (good and bad) with 1024 to 1518 bytes */
u32 ether_stats_pkts_1024to1518_octets;
/* Any frame length from 1519 to the maximum length configured in the
* frm_length register, if it is greater than 1518
*/
u32 ether_stats_pkts_1519tox_octets;
/* Too long frames with CRC error */
u32 ether_stats_jabbers;
/* Too short frames with CRC error */
u32 ether_stats_fragments;
u32 reserved2;
/* FIFO control register */
u32 tx_cmd_stat;
u32 rx_cmd_stat;
/* Extended Statistics Counters */
u32 msb_octets_transmitted_ok;
u32 msb_octets_received_ok;
u32 msb_ether_stats_octets;
u32 reserved3;
/* Multicast address resolution table, mapped in the controller address
* space
*/
u32 hash_table[64];
/* Registers 0 to 31 within PHY device 0/1 connected to the MDIO PHY
* management interface
*/
struct altera_tse_mdio mdio_phy0;
struct altera_tse_mdio mdio_phy1;
/* 4 Supplemental MAC Addresses */
u32 supp_mac_addr_0_0;
u32 supp_mac_addr_0_1;
u32 supp_mac_addr_1_0;
u32 supp_mac_addr_1_1;
u32 supp_mac_addr_2_0;
u32 supp_mac_addr_2_1;
u32 supp_mac_addr_3_0;
u32 supp_mac_addr_3_1;
u32 reserved4[8];
/* IEEE 1588v2 Feature */
u32 tx_period;
u32 tx_adjust_fns;
u32 tx_adjust_ns;
u32 rx_period;
u32 rx_adjust_fns;
u32 rx_adjust_ns;
u32 reserved5[42];
};
#define tse_csroffs(a) (offsetof(struct altera_tse_mac, a))
/* Transmit and Receive Command Registers Bit Definitions
*/
#define ALTERA_TSE_TX_CMD_STAT_OMIT_CRC BIT(17)
#define ALTERA_TSE_TX_CMD_STAT_TX_SHIFT16 BIT(18)
#define ALTERA_TSE_RX_CMD_STAT_RX_SHIFT16 BIT(25)
/* Wrapper around a pointer to a socket buffer,
* so a DMA handle can be stored along with the buffer
*/
struct tse_buffer {
struct list_head lh;
struct sk_buff *skb;
dma_addr_t dma_addr;
u32 len;
int mapped_as_page;
};
struct altera_tse_private;
#define ALTERA_DTYPE_SGDMA 1
#define ALTERA_DTYPE_MSGDMA 2
/* standard DMA interface for SGDMA and MSGDMA */
struct altera_dmaops {
int altera_dtype;
int dmamask;
void (*reset_dma)(struct altera_tse_private *);
void (*enable_txirq)(struct altera_tse_private *);
void (*enable_rxirq)(struct altera_tse_private *);
void (*disable_txirq)(struct altera_tse_private *);
void (*disable_rxirq)(struct altera_tse_private *);
void (*clear_txirq)(struct altera_tse_private *);
void (*clear_rxirq)(struct altera_tse_private *);
int (*tx_buffer)(struct altera_tse_private *, struct tse_buffer *);
u32 (*tx_completions)(struct altera_tse_private *);
void (*add_rx_desc)(struct altera_tse_private *, struct tse_buffer *);
u32 (*get_rx_status)(struct altera_tse_private *);
int (*init_dma)(struct altera_tse_private *);
void (*uninit_dma)(struct altera_tse_private *);
void (*start_rxdma)(struct altera_tse_private *);
};
/* This structure is private to each device.
*/
struct altera_tse_private {
struct net_device *dev;
struct device *device;
struct napi_struct napi;
/* MAC address space */
struct altera_tse_mac __iomem *mac_dev;
/* TSE Revision */
u32 revision;
/* mSGDMA Rx Dispatcher address space */
void __iomem *rx_dma_csr;
void __iomem *rx_dma_desc;
void __iomem *rx_dma_resp;
/* mSGDMA Tx Dispatcher address space */
void __iomem *tx_dma_csr;
void __iomem *tx_dma_desc;
/* Rx buffers queue */
struct tse_buffer *rx_ring;
u32 rx_cons;
u32 rx_prod;
u32 rx_ring_size;
u32 rx_dma_buf_sz;
/* Tx ring buffer */
struct tse_buffer *tx_ring;
u32 tx_prod;
u32 tx_cons;
u32 tx_ring_size;
/* Interrupts */
u32 tx_irq;
u32 rx_irq;
/* RX/TX MAC FIFO configs */
u32 tx_fifo_depth;
u32 rx_fifo_depth;
/* Hash filter settings */
u32 hash_filter;
u32 added_unicast;
/* Descriptor memory info for managing SGDMA */
u32 txdescmem;
u32 rxdescmem;
dma_addr_t rxdescmem_busaddr;
dma_addr_t txdescmem_busaddr;
u32 txctrlreg;
u32 rxctrlreg;
dma_addr_t rxdescphys;
dma_addr_t txdescphys;
struct list_head txlisthd;
struct list_head rxlisthd;
/* MAC command_config register protection */
spinlock_t mac_cfg_lock;
/* Tx path protection */
spinlock_t tx_lock;
/* Rx DMA & interrupt control protection */
spinlock_t rxdma_irq_lock;
/* PHY */
int phy_addr; /* PHY's MDIO address, -1 for autodetection */
phy_interface_t phy_iface;
struct mii_bus *mdio;
int oldspeed;
int oldduplex;
int oldlink;
/* ethtool msglvl option */
u32 msg_enable;
struct altera_dmaops *dmaops;
};
/* Function prototypes
*/
void altera_tse_set_ethtool_ops(struct net_device *);
static inline
u32 csrrd32(void __iomem *mac, size_t offs)
{
void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
return readl(paddr);
}
static inline
u16 csrrd16(void __iomem *mac, size_t offs)
{
void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
return readw(paddr);
}
static inline
u8 csrrd8(void __iomem *mac, size_t offs)
{
void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
return readb(paddr);
}
static inline
void csrwr32(u32 val, void __iomem *mac, size_t offs)
{
void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
writel(val, paddr);
}
static inline
void csrwr16(u16 val, void __iomem *mac, size_t offs)
{
void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
writew(val, paddr);
}
static inline
void csrwr8(u8 val, void __iomem *mac, size_t offs)
{
void __iomem *paddr = (void __iomem *)((uintptr_t)mac + offs);
writeb(val, paddr);
}
#endif /* __ALTERA_TSE_H__ */
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