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linux/drivers/net/mv643xx_eth.h
Dale Farnsworth 6f059c3e90 [PATCH] mv643xx_eth: Cache align skb->data if CONFIG_NOT_COHERENT_CACHE 
When I/O is non-cache-coherent, we need to ensure that the I/O buffers
we use don't share cache lines with other data.

Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-03-21 16:00:51 -05:00

380 lines
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#ifndef __MV643XX_ETH_H__
#define __MV643XX_ETH_H__
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/mii.h>
#include <linux/mv643xx.h>
/* 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_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
#ifdef MV643XX_CHECKSUM_OFFLOAD_TX
#define MAX_DESCS_PER_SKB (MAX_SKB_FRAGS + 1)
#else
#define MAX_DESCS_PER_SKB 1
#endif
/*
* The MV643XX HW requires 8-byte alignment. However, when I/O
* is non-cache-coherent, we need to ensure that the I/O buffers
* we use don't share cache lines with other data.
*/
#if defined(CONFIG_DMA_NONCOHERENT) || defined(CONFIG_NOT_COHERENT_CACHE)
#define ETH_DMA_ALIGN L1_CACHE_BYTES
#else
#define ETH_DMA_ALIGN 8
#endif
#define ETH_VLAN_HLEN 4
#define ETH_FCS_LEN 4
#define ETH_HW_IP_ALIGN 2 /* hw aligns IP header */
#define ETH_WRAPPER_LEN (ETH_HW_IP_ALIGN + ETH_HLEN + \
ETH_VLAN_HLEN + ETH_FCS_LEN)
#define ETH_RX_SKB_SIZE (dev->mtu + ETH_WRAPPER_LEN + ETH_DMA_ALIGN)
#define ETH_RX_QUEUES_ENABLED (1 << 0) /* use only Q0 for receive */
#define ETH_TX_QUEUES_ENABLED (1 << 0) /* use only Q0 for transmit */
#define ETH_INT_CAUSE_RX_DONE (ETH_RX_QUEUES_ENABLED << 2)
#define ETH_INT_CAUSE_RX_ERROR (ETH_RX_QUEUES_ENABLED << 9)
#define ETH_INT_CAUSE_RX (ETH_INT_CAUSE_RX_DONE | ETH_INT_CAUSE_RX_ERROR)
#define ETH_INT_CAUSE_EXT 0x00000002
#define ETH_INT_UNMASK_ALL (ETH_INT_CAUSE_RX | ETH_INT_CAUSE_EXT)
#define ETH_INT_CAUSE_TX_DONE (ETH_TX_QUEUES_ENABLED << 0)
#define ETH_INT_CAUSE_TX_ERROR (ETH_TX_QUEUES_ENABLED << 8)
#define ETH_INT_CAUSE_TX (ETH_INT_CAUSE_TX_DONE | ETH_INT_CAUSE_TX_ERROR)
#define ETH_INT_CAUSE_PHY 0x00010000
#define ETH_INT_UNMASK_ALL_EXT (ETH_INT_CAUSE_TX | ETH_INT_CAUSE_PHY)
#define ETH_INT_MASK_ALL 0x00000000
#define ETH_INT_MASK_ALL_EXT 0x00000000
#define PHY_WAIT_ITERATIONS 1000 /* 1000 iterations * 10uS = 10mS max */
#define PHY_WAIT_MICRO_SECONDS 10
/* 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_PCM 0x00000001
#define ETH_LINK_IS_UP 0x00000002
#define ETH_PORT_AT_FULL_DUPLEX 0x00000004
#define ETH_RX_FLOW_CTRL_ENABLED 0x00000008
#define ETH_GMII_SPEED_1000 0x00000010
#define ETH_MII_SPEED_100 0x00000020
#define ETH_TX_IN_PROGRESS 0x00000080
#define ETH_BYPASS_ACTIVE 0x00000100
#define ETH_PORT_AT_PARTITION_STATE 0x00000200
#define ETH_PORT_TX_FIFO_EMPTY 0x00000400
/* SMI reg */
#define ETH_SMI_BUSY 0x10000000 /* 0 - Write, 1 - Read */
#define ETH_SMI_READ_VALID 0x08000000 /* 0 - Write, 1 - Read */
#define ETH_SMI_OPCODE_WRITE 0 /* Completion of Read */
#define ETH_SMI_OPCODE_READ 0x04000000 /* Operation is in progress */
/* Interrupt Cause Register Bit Definitions */
/* SDMA command status fields macros */
/* Tx & Rx descriptors status */
#define ETH_ERROR_SUMMARY 0x00000001
/* Tx & Rx descriptors command */
#define ETH_BUFFER_OWNED_BY_DMA 0x80000000
/* Tx descriptors status */
#define ETH_LC_ERROR 0
#define ETH_UR_ERROR 0x00000002
#define ETH_RL_ERROR 0x00000004
#define ETH_LLC_SNAP_FORMAT 0x00000200
/* Rx descriptors status */
#define ETH_OVERRUN_ERROR 0x00000002
#define ETH_MAX_FRAME_LENGTH_ERROR 0x00000004
#define ETH_RESOURCE_ERROR 0x00000006
#define ETH_VLAN_TAGGED 0x00080000
#define ETH_BPDU_FRAME 0x00100000
#define ETH_UDP_FRAME_OVER_IP_V_4 0x00200000
#define ETH_OTHER_FRAME_TYPE 0x00400000
#define ETH_LAYER_2_IS_ETH_V_2 0x00800000
#define ETH_FRAME_TYPE_IP_V_4 0x01000000
#define ETH_FRAME_HEADER_OK 0x02000000
#define ETH_RX_LAST_DESC 0x04000000
#define ETH_RX_FIRST_DESC 0x08000000
#define ETH_UNKNOWN_DESTINATION_ADDR 0x10000000
#define ETH_RX_ENABLE_INTERRUPT 0x20000000
#define ETH_LAYER_4_CHECKSUM_OK 0x40000000
/* Rx descriptors byte count */
#define ETH_FRAME_FRAGMENTED 0x00000004
/* Tx descriptors command */
#define ETH_LAYER_4_CHECKSUM_FIRST_DESC 0x00000400
#define ETH_FRAME_SET_TO_VLAN 0x00008000
#define ETH_UDP_FRAME 0x00010000
#define ETH_GEN_TCP_UDP_CHECKSUM 0x00020000
#define ETH_GEN_IP_V_4_CHECKSUM 0x00040000
#define ETH_ZERO_PADDING 0x00080000
#define ETH_TX_LAST_DESC 0x00100000
#define ETH_TX_FIRST_DESC 0x00200000
#define ETH_GEN_CRC 0x00400000
#define ETH_TX_ENABLE_INTERRUPT 0x00800000
#define ETH_AUTO_MODE 0x40000000
#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 */
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 */
/* 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_TX_FAST_REFILL
u32 tx_clean_threshold;
#endif
struct eth_rx_desc *p_rx_desc_area;
dma_addr_t rx_desc_dma;
int rx_desc_area_size;
struct sk_buff **rx_skb;
struct eth_tx_desc *p_tx_desc_area;
dma_addr_t tx_desc_dma;
int tx_desc_area_size;
struct sk_buff **tx_skb;
struct work_struct tx_timeout_task;
struct net_device_stats stats;
struct mv643xx_mib_counters mib_counters;
spinlock_t lock;
/* Size of Tx Ring per queue */
int tx_ring_size;
/* Number of tx descriptors in use */
int tx_desc_count;
/* Size of Rx Ring per queue */
int rx_ring_size;
/* Number of rx descriptors in use */
int rx_desc_count;
/*
* Used in case RX Ring is empty, which can be caused when
* system does not have resources (skb's)
*/
struct timer_list timeout;
u32 rx_int_coal;
u32 tx_int_coal;
struct mii_if_info mii;
};
/* 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 net_device *dev);
/* 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_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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