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https://github.com/edk2-porting/linux-next.git
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36e24e2ee2
Bug: error to get the previous BD entry. When the current BD
is the first BD, the previous BD entry must be the last BD,
not "bdp - 1" in current logic.
V4:
* Optimize fec_enet_get_nextdesc() for code clean.
Replace "ex_new_bd - ring_size" with "ex_base".
Replace "new_bd - ring_size" with "base".
V3:
* Restore the API name because David suggest to use fec_enet_
prefix for all function in fec driver.
So, change next_bd() -> fec_enet_get_nextdesc()
change pre_bd() -> fec_enet_get_prevdesc()
* Reduce the two APIs parameters for easy to call.
V2:
* Add tx_ring_size and rx_ring_size to struct fec_enet_private.
* Replace api fec_enet_get_nextdesc() with next_bd().
Replace api fec_enet_get_prevdesc() with pre_bd().
* Move all ring size check logic to next_bd() and pre_bd(), which
simplifies the code redundancy.
V1:
* Add BD ring size check to get the previous BD entry in correctly.
Reviewed-by: Li Frank <B20596@freescale.com>
Signed-off-by: Fugang Duan <B38611@freescale.com>
Acked-by: Frank Li <frank.li@freescale.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
346 lines
14 KiB
C
346 lines
14 KiB
C
/****************************************************************************/
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/*
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* fec.h -- Fast Ethernet Controller for Motorola ColdFire SoC
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* processors.
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*
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* (C) Copyright 2000-2005, Greg Ungerer (gerg@snapgear.com)
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* (C) Copyright 2000-2001, Lineo (www.lineo.com)
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*/
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/****************************************************************************/
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#ifndef FEC_H
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#define FEC_H
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/****************************************************************************/
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#include <linux/clocksource.h>
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#include <linux/net_tstamp.h>
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#include <linux/ptp_clock_kernel.h>
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#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
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defined(CONFIG_M520x) || defined(CONFIG_M532x) || \
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defined(CONFIG_ARCH_MXC) || defined(CONFIG_SOC_IMX28)
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/*
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* Just figures, Motorola would have to change the offsets for
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* registers in the same peripheral device on different models
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* of the ColdFire!
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*/
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#define FEC_IEVENT 0x004 /* Interrupt event reg */
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#define FEC_IMASK 0x008 /* Interrupt mask reg */
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#define FEC_R_DES_ACTIVE 0x010 /* Receive descriptor reg */
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#define FEC_X_DES_ACTIVE 0x014 /* Transmit descriptor reg */
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#define FEC_ECNTRL 0x024 /* Ethernet control reg */
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#define FEC_MII_DATA 0x040 /* MII manage frame reg */
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#define FEC_MII_SPEED 0x044 /* MII speed control reg */
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#define FEC_MIB_CTRLSTAT 0x064 /* MIB control/status reg */
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#define FEC_R_CNTRL 0x084 /* Receive control reg */
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#define FEC_X_CNTRL 0x0c4 /* Transmit Control reg */
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#define FEC_ADDR_LOW 0x0e4 /* Low 32bits MAC address */
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#define FEC_ADDR_HIGH 0x0e8 /* High 16bits MAC address */
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#define FEC_OPD 0x0ec /* Opcode + Pause duration */
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#define FEC_HASH_TABLE_HIGH 0x118 /* High 32bits hash table */
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#define FEC_HASH_TABLE_LOW 0x11c /* Low 32bits hash table */
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#define FEC_GRP_HASH_TABLE_HIGH 0x120 /* High 32bits hash table */
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#define FEC_GRP_HASH_TABLE_LOW 0x124 /* Low 32bits hash table */
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#define FEC_X_WMRK 0x144 /* FIFO transmit water mark */
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#define FEC_R_BOUND 0x14c /* FIFO receive bound reg */
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#define FEC_R_FSTART 0x150 /* FIFO receive start reg */
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#define FEC_R_DES_START 0x180 /* Receive descriptor ring */
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#define FEC_X_DES_START 0x184 /* Transmit descriptor ring */
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#define FEC_R_BUFF_SIZE 0x188 /* Maximum receive buff size */
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#define FEC_R_FIFO_RSFL 0x190 /* Receive FIFO section full threshold */
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#define FEC_R_FIFO_RSEM 0x194 /* Receive FIFO section empty threshold */
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#define FEC_R_FIFO_RAEM 0x198 /* Receive FIFO almost empty threshold */
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#define FEC_R_FIFO_RAFL 0x19c /* Receive FIFO almost full threshold */
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#define FEC_RACC 0x1C4 /* Receive Accelerator function */
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#define FEC_MIIGSK_CFGR 0x300 /* MIIGSK Configuration reg */
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#define FEC_MIIGSK_ENR 0x308 /* MIIGSK Enable reg */
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#define BM_MIIGSK_CFGR_MII 0x00
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#define BM_MIIGSK_CFGR_RMII 0x01
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#define BM_MIIGSK_CFGR_FRCONT_10M 0x40
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#define RMON_T_DROP 0x200 /* Count of frames not cntd correctly */
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#define RMON_T_PACKETS 0x204 /* RMON TX packet count */
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#define RMON_T_BC_PKT 0x208 /* RMON TX broadcast pkts */
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#define RMON_T_MC_PKT 0x20C /* RMON TX multicast pkts */
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#define RMON_T_CRC_ALIGN 0x210 /* RMON TX pkts with CRC align err */
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#define RMON_T_UNDERSIZE 0x214 /* RMON TX pkts < 64 bytes, good CRC */
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#define RMON_T_OVERSIZE 0x218 /* RMON TX pkts > MAX_FL bytes good CRC */
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#define RMON_T_FRAG 0x21C /* RMON TX pkts < 64 bytes, bad CRC */
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#define RMON_T_JAB 0x220 /* RMON TX pkts > MAX_FL bytes, bad CRC */
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#define RMON_T_COL 0x224 /* RMON TX collision count */
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#define RMON_T_P64 0x228 /* RMON TX 64 byte pkts */
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#define RMON_T_P65TO127 0x22C /* RMON TX 65 to 127 byte pkts */
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#define RMON_T_P128TO255 0x230 /* RMON TX 128 to 255 byte pkts */
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#define RMON_T_P256TO511 0x234 /* RMON TX 256 to 511 byte pkts */
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#define RMON_T_P512TO1023 0x238 /* RMON TX 512 to 1023 byte pkts */
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#define RMON_T_P1024TO2047 0x23C /* RMON TX 1024 to 2047 byte pkts */
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#define RMON_T_P_GTE2048 0x240 /* RMON TX pkts > 2048 bytes */
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#define RMON_T_OCTETS 0x244 /* RMON TX octets */
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#define IEEE_T_DROP 0x248 /* Count of frames not counted crtly */
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#define IEEE_T_FRAME_OK 0x24C /* Frames tx'd OK */
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#define IEEE_T_1COL 0x250 /* Frames tx'd with single collision */
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#define IEEE_T_MCOL 0x254 /* Frames tx'd with multiple collision */
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#define IEEE_T_DEF 0x258 /* Frames tx'd after deferral delay */
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#define IEEE_T_LCOL 0x25C /* Frames tx'd with late collision */
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#define IEEE_T_EXCOL 0x260 /* Frames tx'd with excesv collisions */
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#define IEEE_T_MACERR 0x264 /* Frames tx'd with TX FIFO underrun */
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#define IEEE_T_CSERR 0x268 /* Frames tx'd with carrier sense err */
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#define IEEE_T_SQE 0x26C /* Frames tx'd with SQE err */
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#define IEEE_T_FDXFC 0x270 /* Flow control pause frames tx'd */
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#define IEEE_T_OCTETS_OK 0x274 /* Octet count for frames tx'd w/o err */
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#define RMON_R_PACKETS 0x284 /* RMON RX packet count */
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#define RMON_R_BC_PKT 0x288 /* RMON RX broadcast pkts */
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#define RMON_R_MC_PKT 0x28C /* RMON RX multicast pkts */
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#define RMON_R_CRC_ALIGN 0x290 /* RMON RX pkts with CRC alignment err */
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#define RMON_R_UNDERSIZE 0x294 /* RMON RX pkts < 64 bytes, good CRC */
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#define RMON_R_OVERSIZE 0x298 /* RMON RX pkts > MAX_FL bytes good CRC */
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#define RMON_R_FRAG 0x29C /* RMON RX pkts < 64 bytes, bad CRC */
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#define RMON_R_JAB 0x2A0 /* RMON RX pkts > MAX_FL bytes, bad CRC */
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#define RMON_R_RESVD_O 0x2A4 /* Reserved */
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#define RMON_R_P64 0x2A8 /* RMON RX 64 byte pkts */
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#define RMON_R_P65TO127 0x2AC /* RMON RX 65 to 127 byte pkts */
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#define RMON_R_P128TO255 0x2B0 /* RMON RX 128 to 255 byte pkts */
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#define RMON_R_P256TO511 0x2B4 /* RMON RX 256 to 511 byte pkts */
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#define RMON_R_P512TO1023 0x2B8 /* RMON RX 512 to 1023 byte pkts */
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#define RMON_R_P1024TO2047 0x2BC /* RMON RX 1024 to 2047 byte pkts */
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#define RMON_R_P_GTE2048 0x2C0 /* RMON RX pkts > 2048 bytes */
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#define RMON_R_OCTETS 0x2C4 /* RMON RX octets */
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#define IEEE_R_DROP 0x2C8 /* Count frames not counted correctly */
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#define IEEE_R_FRAME_OK 0x2CC /* Frames rx'd OK */
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#define IEEE_R_CRC 0x2D0 /* Frames rx'd with CRC err */
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#define IEEE_R_ALIGN 0x2D4 /* Frames rx'd with alignment err */
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#define IEEE_R_MACERR 0x2D8 /* Receive FIFO overflow count */
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#define IEEE_R_FDXFC 0x2DC /* Flow control pause frames rx'd */
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#define IEEE_R_OCTETS_OK 0x2E0 /* Octet cnt for frames rx'd w/o err */
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#else
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#define FEC_ECNTRL 0x000 /* Ethernet control reg */
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#define FEC_IEVENT 0x004 /* Interrupt even reg */
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#define FEC_IMASK 0x008 /* Interrupt mask reg */
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#define FEC_IVEC 0x00c /* Interrupt vec status reg */
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#define FEC_R_DES_ACTIVE 0x010 /* Receive descriptor reg */
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#define FEC_X_DES_ACTIVE 0x014 /* Transmit descriptor reg */
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#define FEC_MII_DATA 0x040 /* MII manage frame reg */
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#define FEC_MII_SPEED 0x044 /* MII speed control reg */
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#define FEC_R_BOUND 0x08c /* FIFO receive bound reg */
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#define FEC_R_FSTART 0x090 /* FIFO receive start reg */
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#define FEC_X_WMRK 0x0a4 /* FIFO transmit water mark */
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#define FEC_X_FSTART 0x0ac /* FIFO transmit start reg */
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#define FEC_R_CNTRL 0x104 /* Receive control reg */
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#define FEC_MAX_FRM_LEN 0x108 /* Maximum frame length reg */
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#define FEC_X_CNTRL 0x144 /* Transmit Control reg */
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#define FEC_ADDR_LOW 0x3c0 /* Low 32bits MAC address */
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#define FEC_ADDR_HIGH 0x3c4 /* High 16bits MAC address */
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#define FEC_GRP_HASH_TABLE_HIGH 0x3c8 /* High 32bits hash table */
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#define FEC_GRP_HASH_TABLE_LOW 0x3cc /* Low 32bits hash table */
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#define FEC_R_DES_START 0x3d0 /* Receive descriptor ring */
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#define FEC_X_DES_START 0x3d4 /* Transmit descriptor ring */
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#define FEC_R_BUFF_SIZE 0x3d8 /* Maximum receive buff size */
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#define FEC_FIFO_RAM 0x400 /* FIFO RAM buffer */
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#endif /* CONFIG_M5272 */
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/*
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* Define the buffer descriptor structure.
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*/
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#if defined(CONFIG_ARCH_MXC) || defined(CONFIG_SOC_IMX28)
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struct bufdesc {
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unsigned short cbd_datlen; /* Data length */
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unsigned short cbd_sc; /* Control and status info */
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unsigned long cbd_bufaddr; /* Buffer address */
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};
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#else
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struct bufdesc {
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unsigned short cbd_sc; /* Control and status info */
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unsigned short cbd_datlen; /* Data length */
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unsigned long cbd_bufaddr; /* Buffer address */
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};
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#endif
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struct bufdesc_ex {
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struct bufdesc desc;
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unsigned long cbd_esc;
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unsigned long cbd_prot;
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unsigned long cbd_bdu;
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unsigned long ts;
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unsigned short res0[4];
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};
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/*
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* The following definitions courtesy of commproc.h, which where
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* Copyright (c) 1997 Dan Malek (dmalek@jlc.net).
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*/
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#define BD_SC_EMPTY ((ushort)0x8000) /* Receive is empty */
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#define BD_SC_READY ((ushort)0x8000) /* Transmit is ready */
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#define BD_SC_WRAP ((ushort)0x2000) /* Last buffer descriptor */
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#define BD_SC_INTRPT ((ushort)0x1000) /* Interrupt on change */
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#define BD_SC_CM ((ushort)0x0200) /* Continuous mode */
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#define BD_SC_ID ((ushort)0x0100) /* Rec'd too many idles */
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#define BD_SC_P ((ushort)0x0100) /* xmt preamble */
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#define BD_SC_BR ((ushort)0x0020) /* Break received */
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#define BD_SC_FR ((ushort)0x0010) /* Framing error */
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#define BD_SC_PR ((ushort)0x0008) /* Parity error */
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#define BD_SC_OV ((ushort)0x0002) /* Overrun */
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#define BD_SC_CD ((ushort)0x0001) /* ?? */
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/* Buffer descriptor control/status used by Ethernet receive.
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*/
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#define BD_ENET_RX_EMPTY ((ushort)0x8000)
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#define BD_ENET_RX_WRAP ((ushort)0x2000)
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#define BD_ENET_RX_INTR ((ushort)0x1000)
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#define BD_ENET_RX_LAST ((ushort)0x0800)
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#define BD_ENET_RX_FIRST ((ushort)0x0400)
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#define BD_ENET_RX_MISS ((ushort)0x0100)
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#define BD_ENET_RX_LG ((ushort)0x0020)
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#define BD_ENET_RX_NO ((ushort)0x0010)
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#define BD_ENET_RX_SH ((ushort)0x0008)
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#define BD_ENET_RX_CR ((ushort)0x0004)
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#define BD_ENET_RX_OV ((ushort)0x0002)
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#define BD_ENET_RX_CL ((ushort)0x0001)
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#define BD_ENET_RX_STATS ((ushort)0x013f) /* All status bits */
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/* Enhanced buffer descriptor control/status used by Ethernet receive */
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#define BD_ENET_RX_VLAN 0x00000004
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/* Buffer descriptor control/status used by Ethernet transmit.
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*/
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#define BD_ENET_TX_READY ((ushort)0x8000)
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#define BD_ENET_TX_PAD ((ushort)0x4000)
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#define BD_ENET_TX_WRAP ((ushort)0x2000)
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#define BD_ENET_TX_INTR ((ushort)0x1000)
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#define BD_ENET_TX_LAST ((ushort)0x0800)
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#define BD_ENET_TX_TC ((ushort)0x0400)
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#define BD_ENET_TX_DEF ((ushort)0x0200)
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#define BD_ENET_TX_HB ((ushort)0x0100)
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#define BD_ENET_TX_LC ((ushort)0x0080)
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#define BD_ENET_TX_RL ((ushort)0x0040)
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#define BD_ENET_TX_RCMASK ((ushort)0x003c)
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#define BD_ENET_TX_UN ((ushort)0x0002)
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#define BD_ENET_TX_CSL ((ushort)0x0001)
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#define BD_ENET_TX_STATS ((ushort)0x03ff) /* All status bits */
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/*enhanced buffer descriptor control/status used by Ethernet transmit*/
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#define BD_ENET_TX_INT 0x40000000
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#define BD_ENET_TX_TS 0x20000000
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#define BD_ENET_TX_PINS 0x10000000
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#define BD_ENET_TX_IINS 0x08000000
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/* This device has up to three irqs on some platforms */
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#define FEC_IRQ_NUM 3
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/* The number of Tx and Rx buffers. These are allocated from the page
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* pool. The code may assume these are power of two, so it it best
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* to keep them that size.
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* We don't need to allocate pages for the transmitter. We just use
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* the skbuffer directly.
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*/
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#define FEC_ENET_RX_PAGES 8
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#define FEC_ENET_RX_FRSIZE 2048
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#define FEC_ENET_RX_FRPPG (PAGE_SIZE / FEC_ENET_RX_FRSIZE)
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#define RX_RING_SIZE (FEC_ENET_RX_FRPPG * FEC_ENET_RX_PAGES)
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#define FEC_ENET_TX_FRSIZE 2048
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#define FEC_ENET_TX_FRPPG (PAGE_SIZE / FEC_ENET_TX_FRSIZE)
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#define TX_RING_SIZE 16 /* Must be power of two */
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#define TX_RING_MOD_MASK 15 /* for this to work */
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#define BD_ENET_RX_INT 0x00800000
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#define BD_ENET_RX_PTP ((ushort)0x0400)
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#define BD_ENET_RX_ICE 0x00000020
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#define BD_ENET_RX_PCR 0x00000010
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#define FLAG_RX_CSUM_ENABLED (BD_ENET_RX_ICE | BD_ENET_RX_PCR)
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#define FLAG_RX_CSUM_ERROR (BD_ENET_RX_ICE | BD_ENET_RX_PCR)
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struct fec_enet_delayed_work {
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struct delayed_work delay_work;
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bool timeout;
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bool trig_tx;
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};
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/* The FEC buffer descriptors track the ring buffers. The rx_bd_base and
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* tx_bd_base always point to the base of the buffer descriptors. The
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* cur_rx and cur_tx point to the currently available buffer.
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* The dirty_tx tracks the current buffer that is being sent by the
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* controller. The cur_tx and dirty_tx are equal under both completely
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* empty and completely full conditions. The empty/ready indicator in
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* the buffer descriptor determines the actual condition.
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*/
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struct fec_enet_private {
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/* Hardware registers of the FEC device */
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void __iomem *hwp;
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struct net_device *netdev;
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struct clk *clk_ipg;
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struct clk *clk_ahb;
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struct clk *clk_enet_out;
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struct clk *clk_ptp;
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/* The saved address of a sent-in-place packet/buffer, for skfree(). */
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unsigned char *tx_bounce[TX_RING_SIZE];
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struct sk_buff *tx_skbuff[TX_RING_SIZE];
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struct sk_buff *rx_skbuff[RX_RING_SIZE];
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/* CPM dual port RAM relative addresses */
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dma_addr_t bd_dma;
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/* Address of Rx and Tx buffers */
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struct bufdesc *rx_bd_base;
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struct bufdesc *tx_bd_base;
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/* The next free ring entry */
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struct bufdesc *cur_rx, *cur_tx;
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/* The ring entries to be free()ed */
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struct bufdesc *dirty_tx;
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unsigned short tx_ring_size;
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unsigned short rx_ring_size;
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struct platform_device *pdev;
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int opened;
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int dev_id;
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/* Phylib and MDIO interface */
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struct mii_bus *mii_bus;
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struct phy_device *phy_dev;
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int mii_timeout;
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uint phy_speed;
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phy_interface_t phy_interface;
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int link;
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int full_duplex;
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int speed;
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struct completion mdio_done;
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int irq[FEC_IRQ_NUM];
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int bufdesc_ex;
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int pause_flag;
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struct napi_struct napi;
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int csum_flags;
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struct ptp_clock *ptp_clock;
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struct ptp_clock_info ptp_caps;
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unsigned long last_overflow_check;
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spinlock_t tmreg_lock;
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struct cyclecounter cc;
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struct timecounter tc;
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int rx_hwtstamp_filter;
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u32 base_incval;
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u32 cycle_speed;
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int hwts_rx_en;
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int hwts_tx_en;
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struct timer_list time_keep;
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struct fec_enet_delayed_work delay_work;
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struct regulator *reg_phy;
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};
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void fec_ptp_init(struct platform_device *pdev);
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void fec_ptp_start_cyclecounter(struct net_device *ndev);
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int fec_ptp_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd);
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/****************************************************************************/
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#endif /* FEC_H */
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