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linux/drivers/net/mv643xx_eth.h
Dale Farnsworth 2600636065 [PATCH] mv643xx: add workaround for HW checksum generation bug 
[PATCH] [NET] mv643xx: add workaround for HW checksum generation bug

The hardware checksum generator on the mv64xxx occasionally generates
an incorrect checksum.  This patch works around the issue and enables
hardware checksum generation.

Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2005-08-23 00:51:34 -04:00

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#ifndef __MV643XX_ETH_H__
#define __MV643XX_ETH_H__
#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/mv643xx.h>
#define BIT0 0x00000001
#define BIT1 0x00000002
#define BIT2 0x00000004
#define BIT3 0x00000008
#define BIT4 0x00000010
#define BIT5 0x00000020
#define BIT6 0x00000040
#define BIT7 0x00000080
#define BIT8 0x00000100
#define BIT9 0x00000200
#define BIT10 0x00000400
#define BIT11 0x00000800
#define BIT12 0x00001000
#define BIT13 0x00002000
#define BIT14 0x00004000
#define BIT15 0x00008000
#define BIT16 0x00010000
#define BIT17 0x00020000
#define BIT18 0x00040000
#define BIT19 0x00080000
#define BIT20 0x00100000
#define BIT21 0x00200000
#define BIT22 0x00400000
#define BIT23 0x00800000
#define BIT24 0x01000000
#define BIT25 0x02000000
#define BIT26 0x04000000
#define BIT27 0x08000000
#define BIT28 0x10000000
#define BIT29 0x20000000
#define BIT30 0x40000000
#define BIT31 0x80000000
/*
* The first part is the high level driver of the gigE ethernet ports.
*/
/* Checksum offload for Tx works for most packets, but
* fails if previous packet sent did not use hw csum
*/
#define MV643XX_CHECKSUM_OFFLOAD_TX
#define MV643XX_NAPI
#define MV643XX_TX_FAST_REFILL
#undef MV643XX_RX_QUEUE_FILL_ON_TASK /* Does not work, yet */
#undef MV643XX_COAL
/*
* Number of RX / TX descriptors on RX / TX rings.
* Note that allocating RX descriptors is done by allocating the RX
* ring AND a preallocated RX buffers (skb's) for each descriptor.
* The TX descriptors only allocates the TX descriptors ring,
* with no pre allocated TX buffers (skb's are allocated by higher layers.
*/
/* Default TX ring size is 1000 descriptors */
#define MV643XX_DEFAULT_TX_QUEUE_SIZE 1000
/* Default RX ring size is 400 descriptors */
#define MV643XX_DEFAULT_RX_QUEUE_SIZE 400
#define MV643XX_TX_COAL 100
#ifdef MV643XX_COAL
#define MV643XX_RX_COAL 100
#endif
/*
* The second part is the low level driver of the gigE ethernet ports.
*/
/*
* Header File for : MV-643xx network interface header
*
* DESCRIPTION:
* This header file contains macros typedefs and function declaration for
* the Marvell Gig Bit Ethernet Controller.
*
* DEPENDENCIES:
* None.
*
*/
/* MAC accepet/reject macros */
#define ACCEPT_MAC_ADDR 0
#define REJECT_MAC_ADDR 1
/* Buffer offset from buffer pointer */
#define RX_BUF_OFFSET 0x2
/* Gigabit Ethernet Unit Global Registers */
/* MIB Counters register definitions */
#define ETH_MIB_GOOD_OCTETS_RECEIVED_LOW 0x0
#define ETH_MIB_GOOD_OCTETS_RECEIVED_HIGH 0x4
#define ETH_MIB_BAD_OCTETS_RECEIVED 0x8
#define ETH_MIB_INTERNAL_MAC_TRANSMIT_ERR 0xc
#define ETH_MIB_GOOD_FRAMES_RECEIVED 0x10
#define ETH_MIB_BAD_FRAMES_RECEIVED 0x14
#define ETH_MIB_BROADCAST_FRAMES_RECEIVED 0x18
#define ETH_MIB_MULTICAST_FRAMES_RECEIVED 0x1c
#define ETH_MIB_FRAMES_64_OCTETS 0x20
#define ETH_MIB_FRAMES_65_TO_127_OCTETS 0x24
#define ETH_MIB_FRAMES_128_TO_255_OCTETS 0x28
#define ETH_MIB_FRAMES_256_TO_511_OCTETS 0x2c
#define ETH_MIB_FRAMES_512_TO_1023_OCTETS 0x30
#define ETH_MIB_FRAMES_1024_TO_MAX_OCTETS 0x34
#define ETH_MIB_GOOD_OCTETS_SENT_LOW 0x38
#define ETH_MIB_GOOD_OCTETS_SENT_HIGH 0x3c
#define ETH_MIB_GOOD_FRAMES_SENT 0x40
#define ETH_MIB_EXCESSIVE_COLLISION 0x44
#define ETH_MIB_MULTICAST_FRAMES_SENT 0x48
#define ETH_MIB_BROADCAST_FRAMES_SENT 0x4c
#define ETH_MIB_UNREC_MAC_CONTROL_RECEIVED 0x50
#define ETH_MIB_FC_SENT 0x54
#define ETH_MIB_GOOD_FC_RECEIVED 0x58
#define ETH_MIB_BAD_FC_RECEIVED 0x5c
#define ETH_MIB_UNDERSIZE_RECEIVED 0x60
#define ETH_MIB_FRAGMENTS_RECEIVED 0x64
#define ETH_MIB_OVERSIZE_RECEIVED 0x68
#define ETH_MIB_JABBER_RECEIVED 0x6c
#define ETH_MIB_MAC_RECEIVE_ERROR 0x70
#define ETH_MIB_BAD_CRC_EVENT 0x74
#define ETH_MIB_COLLISION 0x78
#define ETH_MIB_LATE_COLLISION 0x7c
/* Port serial status reg (PSR) */
#define ETH_INTERFACE_GMII_MII 0
#define ETH_INTERFACE_PCM BIT0
#define ETH_LINK_IS_DOWN 0
#define ETH_LINK_IS_UP BIT1
#define ETH_PORT_AT_HALF_DUPLEX 0
#define ETH_PORT_AT_FULL_DUPLEX BIT2
#define ETH_RX_FLOW_CTRL_DISABLED 0
#define ETH_RX_FLOW_CTRL_ENBALED BIT3
#define ETH_GMII_SPEED_100_10 0
#define ETH_GMII_SPEED_1000 BIT4
#define ETH_MII_SPEED_10 0
#define ETH_MII_SPEED_100 BIT5
#define ETH_NO_TX 0
#define ETH_TX_IN_PROGRESS BIT7
#define ETH_BYPASS_NO_ACTIVE 0
#define ETH_BYPASS_ACTIVE BIT8
#define ETH_PORT_NOT_AT_PARTITION_STATE 0
#define ETH_PORT_AT_PARTITION_STATE BIT9
#define ETH_PORT_TX_FIFO_NOT_EMPTY 0
#define ETH_PORT_TX_FIFO_EMPTY BIT10
#define ETH_DEFAULT_RX_BPDU_QUEUE_3 (BIT23 | BIT22)
#define ETH_DEFAULT_RX_BPDU_QUEUE_4 BIT24
#define ETH_DEFAULT_RX_BPDU_QUEUE_5 (BIT24 | BIT22)
#define ETH_DEFAULT_RX_BPDU_QUEUE_6 (BIT24 | BIT23)
#define ETH_DEFAULT_RX_BPDU_QUEUE_7 (BIT24 | BIT23 | BIT22)
/* SMI reg */
#define ETH_SMI_BUSY BIT28 /* 0 - Write, 1 - Read */
#define ETH_SMI_READ_VALID BIT27 /* 0 - Write, 1 - Read */
#define ETH_SMI_OPCODE_WRITE 0 /* Completion of Read operation */
#define ETH_SMI_OPCODE_READ BIT26 /* Operation is in progress */
/* SDMA command status fields macros */
/* Tx & Rx descriptors status */
#define ETH_ERROR_SUMMARY (BIT0)
/* Tx & Rx descriptors command */
#define ETH_BUFFER_OWNED_BY_DMA (BIT31)
/* Tx descriptors status */
#define ETH_LC_ERROR (0 )
#define ETH_UR_ERROR (BIT1 )
#define ETH_RL_ERROR (BIT2 )
#define ETH_LLC_SNAP_FORMAT (BIT9 )
/* Rx descriptors status */
#define ETH_CRC_ERROR (0 )
#define ETH_OVERRUN_ERROR (BIT1 )
#define ETH_MAX_FRAME_LENGTH_ERROR (BIT2 )
#define ETH_RESOURCE_ERROR ((BIT2 | BIT1))
#define ETH_VLAN_TAGGED (BIT19)
#define ETH_BPDU_FRAME (BIT20)
#define ETH_TCP_FRAME_OVER_IP_V_4 (0 )
#define ETH_UDP_FRAME_OVER_IP_V_4 (BIT21)
#define ETH_OTHER_FRAME_TYPE (BIT22)
#define ETH_LAYER_2_IS_ETH_V_2 (BIT23)
#define ETH_FRAME_TYPE_IP_V_4 (BIT24)
#define ETH_FRAME_HEADER_OK (BIT25)
#define ETH_RX_LAST_DESC (BIT26)
#define ETH_RX_FIRST_DESC (BIT27)
#define ETH_UNKNOWN_DESTINATION_ADDR (BIT28)
#define ETH_RX_ENABLE_INTERRUPT (BIT29)
#define ETH_LAYER_4_CHECKSUM_OK (BIT30)
/* Rx descriptors byte count */
#define ETH_FRAME_FRAGMENTED (BIT2)
/* Tx descriptors command */
#define ETH_LAYER_4_CHECKSUM_FIRST_DESC (BIT10)
#define ETH_FRAME_SET_TO_VLAN (BIT15)
#define ETH_TCP_FRAME (0 )
#define ETH_UDP_FRAME (BIT16)
#define ETH_GEN_TCP_UDP_CHECKSUM (BIT17)
#define ETH_GEN_IP_V_4_CHECKSUM (BIT18)
#define ETH_ZERO_PADDING (BIT19)
#define ETH_TX_LAST_DESC (BIT20)
#define ETH_TX_FIRST_DESC (BIT21)
#define ETH_GEN_CRC (BIT22)
#define ETH_TX_ENABLE_INTERRUPT (BIT23)
#define ETH_AUTO_MODE (BIT30)
#define ETH_TX_IHL_SHIFT 11
/* typedefs */
typedef enum _eth_func_ret_status {
ETH_OK, /* Returned as expected. */
ETH_ERROR, /* Fundamental error. */
ETH_RETRY, /* Could not process request. Try later.*/
ETH_END_OF_JOB, /* Ring has nothing to process. */
ETH_QUEUE_FULL, /* Ring resource error. */
ETH_QUEUE_LAST_RESOURCE /* Ring resources about to exhaust. */
} ETH_FUNC_RET_STATUS;
typedef enum _eth_target {
ETH_TARGET_DRAM,
ETH_TARGET_DEVICE,
ETH_TARGET_CBS,
ETH_TARGET_PCI0,
ETH_TARGET_PCI1
} ETH_TARGET;
/* These are for big-endian machines. Little endian needs different
* definitions.
*/
#if defined(__BIG_ENDIAN)
struct eth_rx_desc {
u16 byte_cnt; /* Descriptor buffer byte count */
u16 buf_size; /* Buffer size */
u32 cmd_sts; /* Descriptor command status */
u32 next_desc_ptr; /* Next descriptor pointer */
u32 buf_ptr; /* Descriptor buffer pointer */
};
struct eth_tx_desc {
u16 byte_cnt; /* buffer byte count */
u16 l4i_chk; /* CPU provided TCP checksum */
u32 cmd_sts; /* Command/status field */
u32 next_desc_ptr; /* Pointer to next descriptor */
u32 buf_ptr; /* pointer to buffer for this descriptor*/
};
#elif defined(__LITTLE_ENDIAN)
struct eth_rx_desc {
u32 cmd_sts; /* Descriptor command status */
u16 buf_size; /* Buffer size */
u16 byte_cnt; /* Descriptor buffer byte count */
u32 buf_ptr; /* Descriptor buffer pointer */
u32 next_desc_ptr; /* Next descriptor pointer */
};
struct eth_tx_desc {
u32 cmd_sts; /* Command/status field */
u16 l4i_chk; /* CPU provided TCP checksum */
u16 byte_cnt; /* buffer byte count */
u32 buf_ptr; /* pointer to buffer for this descriptor*/
u32 next_desc_ptr; /* Pointer to next descriptor */
};
#else
#error One of __BIG_ENDIAN or __LITTLE_ENDIAN must be defined
#endif
/* Unified struct for Rx and Tx operations. The user is not required to */
/* be familier with neither Tx nor Rx descriptors. */
struct pkt_info {
unsigned short byte_cnt; /* Descriptor buffer byte count */
unsigned short l4i_chk; /* Tx CPU provided TCP Checksum */
unsigned int cmd_sts; /* Descriptor command status */
dma_addr_t buf_ptr; /* Descriptor buffer pointer */
struct sk_buff *return_info; /* User resource return information */
};
/* Ethernet port specific infomation */
struct mv643xx_mib_counters {
u64 good_octets_received;
u32 bad_octets_received;
u32 internal_mac_transmit_err;
u32 good_frames_received;
u32 bad_frames_received;
u32 broadcast_frames_received;
u32 multicast_frames_received;
u32 frames_64_octets;
u32 frames_65_to_127_octets;
u32 frames_128_to_255_octets;
u32 frames_256_to_511_octets;
u32 frames_512_to_1023_octets;
u32 frames_1024_to_max_octets;
u64 good_octets_sent;
u32 good_frames_sent;
u32 excessive_collision;
u32 multicast_frames_sent;
u32 broadcast_frames_sent;
u32 unrec_mac_control_received;
u32 fc_sent;
u32 good_fc_received;
u32 bad_fc_received;
u32 undersize_received;
u32 fragments_received;
u32 oversize_received;
u32 jabber_received;
u32 mac_receive_error;
u32 bad_crc_event;
u32 collision;
u32 late_collision;
};
struct mv643xx_private {
int port_num; /* User Ethernet port number */
u8 port_mac_addr[6]; /* User defined port MAC address.*/
u32 port_config; /* User port configuration value*/
u32 port_config_extend; /* User port config extend value*/
u32 port_sdma_config; /* User port SDMA config value */
u32 port_serial_control; /* User port serial control value */
u32 port_tx_queue_command; /* Port active Tx queues summary*/
u32 port_rx_queue_command; /* Port active Rx queues summary*/
u32 rx_sram_addr; /* Base address of rx sram area */
u32 rx_sram_size; /* Size of rx sram area */
u32 tx_sram_addr; /* Base address of tx sram area */
u32 tx_sram_size; /* Size of tx sram area */
int rx_resource_err; /* Rx ring resource error flag */
int tx_resource_err; /* Tx ring resource error flag */
/* Tx/Rx rings managment indexes fields. For driver use */
/* Next available and first returning Rx resource */
int rx_curr_desc_q, rx_used_desc_q;
/* Next available and first returning Tx resource */
int tx_curr_desc_q, tx_used_desc_q;
#ifdef MV643XX_CHECKSUM_OFFLOAD_TX
int tx_first_desc_q;
u32 tx_first_command;
#endif
#ifdef MV643XX_TX_FAST_REFILL
u32 tx_clean_threshold;
#endif
struct eth_rx_desc *p_rx_desc_area;
dma_addr_t rx_desc_dma;
unsigned int rx_desc_area_size;
struct sk_buff **rx_skb;
struct eth_tx_desc *p_tx_desc_area;
dma_addr_t tx_desc_dma;
unsigned int tx_desc_area_size;
struct sk_buff **tx_skb;
struct work_struct tx_timeout_task;
/*
* Former struct mv643xx_eth_priv members start here
*/
struct net_device_stats stats;
struct mv643xx_mib_counters mib_counters;
spinlock_t lock;
/* Size of Tx Ring per queue */
unsigned int tx_ring_size;
/* Ammont of SKBs outstanding on Tx queue */
unsigned int tx_ring_skbs;
/* Size of Rx Ring per queue */
unsigned int rx_ring_size;
/* Ammount of SKBs allocated to Rx Ring per queue */
unsigned int rx_ring_skbs;
/*
* rx_task used to fill RX ring out of bottom half context
*/
struct work_struct rx_task;
/*
* Used in case RX Ring is empty, which can be caused when
* system does not have resources (skb's)
*/
struct timer_list timeout;
long rx_task_busy __attribute__ ((aligned(SMP_CACHE_BYTES)));
unsigned rx_timer_flag;
u32 rx_int_coal;
u32 tx_int_coal;
};
/* ethernet.h API list */
/* Port operation control routines */
static void eth_port_init(struct mv643xx_private *mp);
static void eth_port_reset(unsigned int eth_port_num);
static void eth_port_start(struct mv643xx_private *mp);
static void ethernet_set_config_reg(unsigned int eth_port_num,
unsigned int value);
static unsigned int ethernet_get_config_reg(unsigned int eth_port_num);
/* Port MAC address routines */
static void eth_port_uc_addr_set(unsigned int eth_port_num,
unsigned char *p_addr);
/* PHY and MIB routines */
static void ethernet_phy_reset(unsigned int eth_port_num);
static void eth_port_write_smi_reg(unsigned int eth_port_num,
unsigned int phy_reg, unsigned int value);
static void eth_port_read_smi_reg(unsigned int eth_port_num,
unsigned int phy_reg, unsigned int *value);
static void eth_clear_mib_counters(unsigned int eth_port_num);
/* Port data flow control routines */
static ETH_FUNC_RET_STATUS eth_port_send(struct mv643xx_private *mp,
struct pkt_info *p_pkt_info);
static ETH_FUNC_RET_STATUS eth_tx_return_desc(struct mv643xx_private *mp,
struct pkt_info *p_pkt_info);
static ETH_FUNC_RET_STATUS eth_port_receive(struct mv643xx_private *mp,
struct pkt_info *p_pkt_info);
static ETH_FUNC_RET_STATUS eth_rx_return_buff(struct mv643xx_private *mp,
struct pkt_info *p_pkt_info);
#endif /* __MV643XX_ETH_H__ */
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