igb.h

/* Intel(R) Gigabit Ethernet Linux driver
 * Copyright(c) 2007-2014 Intel Corporation.
 *
 * 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/>.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Contact Information:
 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 */

/* Linux PRO/1000 Ethernet Driver main header file */

#ifndef _IGB_H_
#define _IGB_H_

#include "e1000_mac.h"
#include "e1000_82575.h"

#include <linux/timecounter.h>
#include <linux/net_tstamp.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/bitops.h>
#include <linux/if_vlan.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/pci.h>
#include <linux/mdio.h>

struct igb_adapter;

#define E1000_PCS_CFG_IGN_SD	1

/* Interrupt defines */
#define IGB_START_ITR		648 /* ~6000 ints/sec */
#define IGB_4K_ITR		980
#define IGB_20K_ITR		196
#define IGB_70K_ITR		56

/* TX/RX descriptor defines */
#define IGB_DEFAULT_TXD		256
#define IGB_DEFAULT_TX_WORK	128
#define IGB_MIN_TXD		80
#define IGB_MAX_TXD		4096

#define IGB_DEFAULT_RXD		256
#define IGB_MIN_RXD		80
#define IGB_MAX_RXD		4096

#define IGB_DEFAULT_ITR		3 /* dynamic */
#define IGB_MAX_ITR_USECS	10000
#define IGB_MIN_ITR_USECS	10
#define NON_Q_VECTORS		1
#define MAX_Q_VECTORS		8
#define MAX_MSIX_ENTRIES	10

/* Transmit and receive queues */
#define IGB_MAX_RX_QUEUES	8
#define IGB_MAX_RX_QUEUES_82575	4
#define IGB_MAX_RX_QUEUES_I211	2
#define IGB_MAX_TX_QUEUES	8
#define IGB_MAX_VF_MC_ENTRIES	30
#define IGB_MAX_VF_FUNCTIONS	8
#define IGB_MAX_VFTA_ENTRIES	128
#define IGB_82576_VF_DEV_ID	0x10CA
#define IGB_I350_VF_DEV_ID	0x1520

/* NVM version defines */
#define IGB_MAJOR_MASK		0xF000
#define IGB_MINOR_MASK		0x0FF0
#define IGB_BUILD_MASK		0x000F
#define IGB_COMB_VER_MASK	0x00FF
#define IGB_MAJOR_SHIFT		12
#define IGB_MINOR_SHIFT		4
#define IGB_COMB_VER_SHFT	8
#define IGB_NVM_VER_INVALID	0xFFFF
#define IGB_ETRACK_SHIFT	16
#define NVM_ETRACK_WORD		0x0042
#define NVM_COMB_VER_OFF	0x0083
#define NVM_COMB_VER_PTR	0x003d

struct vf_data_storage {
	unsigned char vf_mac_addresses[ETH_ALEN];
	u16 vf_mc_hashes[IGB_MAX_VF_MC_ENTRIES];
	u16 num_vf_mc_hashes;
	u16 vlans_enabled;
	u32 flags;
	unsigned long last_nack;
	u16 pf_vlan; /* When set, guest VLAN config not allowed. */
	u16 pf_qos;
	u16 tx_rate;
	bool spoofchk_enabled;
};

#define IGB_VF_FLAG_CTS            0x00000001 /* VF is clear to send data */
#define IGB_VF_FLAG_UNI_PROMISC    0x00000002 /* VF has unicast promisc */
#define IGB_VF_FLAG_MULTI_PROMISC  0x00000004 /* VF has multicast promisc */
#define IGB_VF_FLAG_PF_SET_MAC     0x00000008 /* PF has set MAC address */

/* RX descriptor control thresholds.
 * PTHRESH - MAC will consider prefetch if it has fewer than this number of
 *           descriptors available in its onboard memory.
 *           Setting this to 0 disables RX descriptor prefetch.
 * HTHRESH - MAC will only prefetch if there are at least this many descriptors
 *           available in host memory.
 *           If PTHRESH is 0, this should also be 0.
 * WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
 *           descriptors until either it has this many to write back, or the
 *           ITR timer expires.
 */
#define IGB_RX_PTHRESH	((hw->mac.type == e1000_i354) ? 12 : 8)
#define IGB_RX_HTHRESH	8
#define IGB_TX_PTHRESH	((hw->mac.type == e1000_i354) ? 20 : 8)
#define IGB_TX_HTHRESH	1
#define IGB_RX_WTHRESH	((hw->mac.type == e1000_82576 && \
			  (adapter->flags & IGB_FLAG_HAS_MSIX)) ? 1 : 4)
#define IGB_TX_WTHRESH	((hw->mac.type == e1000_82576 && \
			  (adapter->flags & IGB_FLAG_HAS_MSIX)) ? 1 : 16)

/* this is the size past which hardware will drop packets when setting LPE=0 */
#define MAXIMUM_ETHERNET_VLAN_SIZE 1522

/* Supported Rx Buffer Sizes */
#define IGB_RXBUFFER_256	256
#define IGB_RXBUFFER_2048	2048
#define IGB_RX_HDR_LEN		IGB_RXBUFFER_256
#define IGB_RX_BUFSZ		IGB_RXBUFFER_2048

/* How many Rx Buffers do we bundle into one write to the hardware ? */
#define IGB_RX_BUFFER_WRITE	16 /* Must be power of 2 */

#define AUTO_ALL_MODES		0
#define IGB_EEPROM_APME		0x0400

#ifndef IGB_MASTER_SLAVE
/* Switch to override PHY master/slave setting */
#define IGB_MASTER_SLAVE	e1000_ms_hw_default
#endif

#define IGB_MNG_VLAN_NONE	-1

enum igb_tx_flags {
	/* cmd_type flags */
	IGB_TX_FLAGS_VLAN	= 0x01,
	IGB_TX_FLAGS_TSO	= 0x02,
	IGB_TX_FLAGS_TSTAMP	= 0x04,

	/* olinfo flags */
	IGB_TX_FLAGS_IPV4	= 0x10,
	IGB_TX_FLAGS_CSUM	= 0x20,
};

/* VLAN info */
#define IGB_TX_FLAGS_VLAN_MASK	0xffff0000
#define IGB_TX_FLAGS_VLAN_SHIFT	16

/* The largest size we can write to the descriptor is 65535.  In order to
 * maintain a power of two alignment we have to limit ourselves to 32K.
 */
#define IGB_MAX_TXD_PWR	15
#define IGB_MAX_DATA_PER_TXD	(1 << IGB_MAX_TXD_PWR)

/* Tx Descriptors needed, worst case */
#define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IGB_MAX_DATA_PER_TXD)
#define DESC_NEEDED (MAX_SKB_FRAGS + 4)

/* EEPROM byte offsets */
#define IGB_SFF_8472_SWAP		0x5C
#define IGB_SFF_8472_COMP		0x5E

/* Bitmasks */
#define IGB_SFF_ADDRESSING_MODE		0x4
#define IGB_SFF_8472_UNSUP		0x00

/* wrapper around a pointer to a socket buffer,
 * so a DMA handle can be stored along with the buffer
 */
struct igb_tx_buffer {
	union e1000_adv_tx_desc *next_to_watch;
	unsigned long time_stamp;
	struct sk_buff *skb;
	unsigned int bytecount;
	u16 gso_segs;
	__be16 protocol;

	DEFINE_DMA_UNMAP_ADDR(dma);
	DEFINE_DMA_UNMAP_LEN(len);
	u32 tx_flags;
};

struct igb_rx_buffer {
	dma_addr_t dma;
	struct page *page;
	unsigned int page_offset;
};

struct igb_tx_queue_stats {
	u64 packets;
	u64 bytes;
	u64 restart_queue;
	u64 restart_queue2;
};

struct igb_rx_queue_stats {
	u64 packets;
	u64 bytes;
	u64 drops;
	u64 csum_err;
	u64 alloc_failed;
};

struct igb_ring_container {
	struct igb_ring *ring;		/* pointer to linked list of rings */
	unsigned int total_bytes;	/* total bytes processed this int */
	unsigned int total_packets;	/* total packets processed this int */
	u16 work_limit;			/* total work allowed per interrupt */
	u8 count;			/* total number of rings in vector */
	u8 itr;				/* current ITR setting for ring */
};

struct igb_ring {
	struct igb_q_vector *q_vector;	/* backlink to q_vector */
	struct net_device *netdev;	/* back pointer to net_device */
	struct device *dev;		/* device pointer for dma mapping */
	union {				/* array of buffer info structs */
		struct igb_tx_buffer *tx_buffer_info;
		struct igb_rx_buffer *rx_buffer_info;
	};
	void *desc;			/* descriptor ring memory */
	unsigned long flags;		/* ring specific flags */
	void __iomem *tail;		/* pointer to ring tail register */
	dma_addr_t dma;			/* phys address of the ring */
	unsigned int  size;		/* length of desc. ring in bytes */

	u16 count;			/* number of desc. in the ring */
	u8 queue_index;			/* logical index of the ring*/
	u8 reg_idx;			/* physical index of the ring */

	/* everything past this point are written often */
	u16 next_to_clean;
	u16 next_to_use;
	u16 next_to_alloc;

	union {
		/* TX */
		struct {
			struct igb_tx_queue_stats tx_stats;
			struct u64_stats_sync tx_syncp;
			struct u64_stats_sync tx_syncp2;
		};
		/* RX */
		struct {
			struct sk_buff *skb;
			struct igb_rx_queue_stats rx_stats;
			struct u64_stats_sync rx_syncp;
		};
	};
} ____cacheline_internodealigned_in_smp;

struct igb_q_vector {
	struct igb_adapter *adapter;	/* backlink */
	int cpu;			/* CPU for DCA */
	u32 eims_value;			/* EIMS mask value */

	u16 itr_val;
	u8 set_itr;
	void __iomem *itr_register;

	struct igb_ring_container rx, tx;

	struct napi_struct napi;
	struct rcu_head rcu;	/* to avoid race with update stats on free */
	char name[IFNAMSIZ + 9];

	/* for dynamic allocation of rings associated with this q_vector */
	struct igb_ring ring[0] ____cacheline_internodealigned_in_smp;
};

enum e1000_ring_flags_t {
	IGB_RING_FLAG_RX_SCTP_CSUM,
	IGB_RING_FLAG_RX_LB_VLAN_BSWAP,
	IGB_RING_FLAG_TX_CTX_IDX,
	IGB_RING_FLAG_TX_DETECT_HANG
};

#define IGB_TXD_DCMD (E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_RS)

#define IGB_RX_DESC(R, i)	\
	(&(((union e1000_adv_rx_desc *)((R)->desc))[i]))
#define IGB_TX_DESC(R, i)	\
	(&(((union e1000_adv_tx_desc *)((R)->desc))[i]))
#define IGB_TX_CTXTDESC(R, i)	\
	(&(((struct e1000_adv_tx_context_desc *)((R)->desc))[i]))

/* igb_test_staterr - tests bits within Rx descriptor status and error fields */
static inline __le32 igb_test_staterr(union e1000_adv_rx_desc *rx_desc,
				      const u32 stat_err_bits)
{
	return rx_desc->wb.upper.status_error & cpu_to_le32(stat_err_bits);
}

/* igb_desc_unused - calculate if we have unused descriptors */
static inline int igb_desc_unused(struct igb_ring *ring)
{
	if (ring->next_to_clean > ring->next_to_use)
		return ring->next_to_clean - ring->next_to_use - 1;

	return ring->count + ring->next_to_clean - ring->next_to_use - 1;
}

#ifdef CONFIG_IGB_HWMON

#define IGB_HWMON_TYPE_LOC	0
#define IGB_HWMON_TYPE_TEMP	1
#define IGB_HWMON_TYPE_CAUTION	2
#define IGB_HWMON_TYPE_MAX	3

struct hwmon_attr {
	struct device_attribute dev_attr;
	struct e1000_hw *hw;
	struct e1000_thermal_diode_data *sensor;
	char name[12];
	};

struct hwmon_buff {
	struct attribute_group group;
	const struct attribute_group *groups[2];
	struct attribute *attrs[E1000_MAX_SENSORS * 4 + 1];
	struct hwmon_attr hwmon_list[E1000_MAX_SENSORS * 4];
	unsigned int n_hwmon;
	};
#endif

#define IGB_RETA_SIZE	128

/* board specific private data structure */
struct igb_adapter {
	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];

	struct net_device *netdev;

	unsigned long state;
	unsigned int flags;

	unsigned int num_q_vectors;
	struct msix_entry msix_entries[MAX_MSIX_ENTRIES];

	/* Interrupt Throttle Rate */
	u32 rx_itr_setting;
	u32 tx_itr_setting;
	u16 tx_itr;
	u16 rx_itr;

	/* TX */
	u16 tx_work_limit;
	u32 tx_timeout_count;
	int num_tx_queues;
	struct igb_ring *tx_ring[16];

	/* RX */
	int num_rx_queues;
	struct igb_ring *rx_ring[16];

	u32 max_frame_size;
	u32 min_frame_size;

	struct timer_list watchdog_timer;
	struct timer_list phy_info_timer;

	u16 mng_vlan_id;
	u32 bd_number;
	u32 wol;
	u32 en_mng_pt;
	u16 link_speed;
	u16 link_duplex;

	struct work_struct reset_task;
	struct work_struct watchdog_task;
	bool fc_autoneg;
	u8  tx_timeout_factor;
	struct timer_list blink_timer;
	unsigned long led_status;

	/* OS defined structs */
	struct pci_dev *pdev;

	spinlock_t stats64_lock;
	struct rtnl_link_stats64 stats64;

	/* structs defined in e1000_hw.h */
	struct e1000_hw hw;
	struct e1000_hw_stats stats;
	struct e1000_phy_info phy_info;

	u32 test_icr;
	struct igb_ring test_tx_ring;
	struct igb_ring test_rx_ring;

	int msg_enable;

	struct igb_q_vector *q_vector[MAX_Q_VECTORS];
	u32 eims_enable_mask;
	u32 eims_other;

	/* to not mess up cache alignment, always add to the bottom */
	u16 tx_ring_count;
	u16 rx_ring_count;
	unsigned int vfs_allocated_count;
	struct vf_data_storage *vf_data;
	int vf_rate_link_speed;
	u32 rss_queues;
	u32 wvbr;
	u32 *shadow_vfta;

	struct ptp_clock *ptp_clock;
	struct ptp_clock_info ptp_caps;
	struct delayed_work ptp_overflow_work;
	struct work_struct ptp_tx_work;
	struct sk_buff *ptp_tx_skb;
	struct hwtstamp_config tstamp_config;
	unsigned long ptp_tx_start;
	unsigned long last_rx_ptp_check;
	unsigned long last_rx_timestamp;
	spinlock_t tmreg_lock;
	struct cyclecounter cc;
	struct timecounter tc;
	u32 tx_hwtstamp_timeouts;
	u32 rx_hwtstamp_cleared;

	char fw_version[32];
#ifdef CONFIG_IGB_HWMON
	struct hwmon_buff *igb_hwmon_buff;
	bool ets;
#endif
	struct i2c_algo_bit_data i2c_algo;
	struct i2c_adapter i2c_adap;
	struct i2c_client *i2c_client;
	u32 rss_indir_tbl_init;
	u8 rss_indir_tbl[IGB_RETA_SIZE];

	unsigned long link_check_timeout;
	int copper_tries;
	struct e1000_info ei;
	u16 eee_advert;
};

#define IGB_FLAG_HAS_MSI		(1 << 0)
#define IGB_FLAG_DCA_ENABLED		(1 << 1)
#define IGB_FLAG_QUAD_PORT_A		(1 << 2)
#define IGB_FLAG_QUEUE_PAIRS		(1 << 3)
#define IGB_FLAG_DMAC			(1 << 4)
#define IGB_FLAG_PTP			(1 << 5)
#define IGB_FLAG_RSS_FIELD_IPV4_UDP	(1 << 6)
#define IGB_FLAG_RSS_FIELD_IPV6_UDP	(1 << 7)
#define IGB_FLAG_WOL_SUPPORTED		(1 << 8)
#define IGB_FLAG_NEED_LINK_UPDATE	(1 << 9)
#define IGB_FLAG_MEDIA_RESET		(1 << 10)
#define IGB_FLAG_MAS_CAPABLE		(1 << 11)
#define IGB_FLAG_MAS_ENABLE		(1 << 12)
#define IGB_FLAG_HAS_MSIX		(1 << 13)
#define IGB_FLAG_EEE			(1 << 14)

/* Media Auto Sense */
#define IGB_MAS_ENABLE_0		0X0001
#define IGB_MAS_ENABLE_1		0X0002
#define IGB_MAS_ENABLE_2		0X0004
#define IGB_MAS_ENABLE_3		0X0008

/* DMA Coalescing defines */
#define IGB_MIN_TXPBSIZE	20408
#define IGB_TX_BUF_4096		4096
#define IGB_DMCTLX_DCFLUSH_DIS	0x80000000  /* Disable DMA Coal Flush */

#define IGB_82576_TSYNC_SHIFT	19
#define IGB_TS_HDR_LEN		16
enum e1000_state_t {
	__IGB_TESTING,
	__IGB_RESETTING,
	__IGB_DOWN,
	__IGB_PTP_TX_IN_PROGRESS,
};

enum igb_boards {
	board_82575,
};

extern char igb_driver_name[];
extern char igb_driver_version[];

int igb_up(struct igb_adapter *);
void igb_down(struct igb_adapter *);
void igb_reinit_locked(struct igb_adapter *);
void igb_reset(struct igb_adapter *);
int igb_reinit_queues(struct igb_adapter *);
void igb_write_rss_indir_tbl(struct igb_adapter *);
int igb_set_spd_dplx(struct igb_adapter *, u32, u8);
int igb_setup_tx_resources(struct igb_ring *);
int igb_setup_rx_resources(struct igb_ring *);
void igb_free_tx_resources(struct igb_ring *);
void igb_free_rx_resources(struct igb_ring *);
void igb_configure_tx_ring(struct igb_adapter *, struct igb_ring *);
void igb_configure_rx_ring(struct igb_adapter *, struct igb_ring *);
void igb_setup_tctl(struct igb_adapter *);
void igb_setup_rctl(struct igb_adapter *);
netdev_tx_t igb_xmit_frame_ring(struct sk_buff *, struct igb_ring *);
void igb_unmap_and_free_tx_resource(struct igb_ring *, struct igb_tx_buffer *);
void igb_alloc_rx_buffers(struct igb_ring *, u16);
void igb_update_stats(struct igb_adapter *, struct rtnl_link_stats64 *);
bool igb_has_link(struct igb_adapter *adapter);
void igb_set_ethtool_ops(struct net_device *);
void igb_power_up_link(struct igb_adapter *);
void igb_set_fw_version(struct igb_adapter *);
void igb_ptp_init(struct igb_adapter *adapter);
void igb_ptp_stop(struct igb_adapter *adapter);
void igb_ptp_reset(struct igb_adapter *adapter);
void igb_ptp_rx_hang(struct igb_adapter *adapter);
void igb_ptp_rx_rgtstamp(struct igb_q_vector *q_vector, struct sk_buff *skb);
void igb_ptp_rx_pktstamp(struct igb_q_vector *q_vector, unsigned char *va,
			 struct sk_buff *skb);
int igb_ptp_set_ts_config(struct net_device *netdev, struct ifreq *ifr);
int igb_ptp_get_ts_config(struct net_device *netdev, struct ifreq *ifr);
#ifdef CONFIG_IGB_HWMON
void igb_sysfs_exit(struct igb_adapter *adapter);
int igb_sysfs_init(struct igb_adapter *adapter);
#endif
static inline s32 igb_reset_phy(struct e1000_hw *hw)
{
	if (hw->phy.ops.reset)
		return hw->phy.ops.reset(hw);

	return 0;
}

static inline s32 igb_read_phy_reg(struct e1000_hw *hw, u32 offset, u16 *data)
{
	if (hw->phy.ops.read_reg)
		return hw->phy.ops.read_reg(hw, offset, data);

	return 0;
}

static inline s32 igb_write_phy_reg(struct e1000_hw *hw, u32 offset, u16 data)
{
	if (hw->phy.ops.write_reg)
		return hw->phy.ops.write_reg(hw, offset, data);

	return 0;
}

static inline s32 igb_get_phy_info(struct e1000_hw *hw)
{
	if (hw->phy.ops.get_phy_info)
		return hw->phy.ops.get_phy_info(hw);

	return 0;
}

static inline struct netdev_queue *txring_txq(const struct igb_ring *tx_ring)
{
	return netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index);
}

#endif /* _IGB_H_ */