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freebsd-skq/sys/dev/e1000/if_igb.h
jfv 38b99982d5 Part 2 of 2 New deltas for the 1G drivers. 
There have still been intermittent problems with apparent TX
hangs for some customers. These have been problematic to reproduce
but I believe these changes will address them. Testing on a number
of fronts have been positive.

EM: there is an important 'chicken bit' fix for 82574 in the shared
code this is supported in the core here.
    - The TX path has been tightened up to improve performance. In
      particular UDP with jumbo frames was having problems, and the
      changes here have improved that.
    - OACTIVE has been used more carefully on the theory that some
      hangs may be due to a problem in this interaction
    - Problems with the RX init code, the "lazy" allocation and
      ring initialization has been found to cause problems in some
      newer client systems, and as it really is not that big a win
      (its not in a hot path) it seems best to remove it.
    - HWTSO was broken when VLAN HWTAGGING or HWFILTER is used, I
      found this was due to an error in setting up the descriptors
      in em_xmit.

IGB:
    - TX is also improved here. With multiqueue I realized its very
      important to handle OACTIVE only under the CORE lock so there
      are no races between the queues.
    - Flow Control handling was broken in a couple ways, I have changed
      and I hope improved that in this delta.
    - UDP also had a problem in the TX path here, it was change to
      improve that.
    - On some hardware, with the driver static, a weird stray interrupt
      seems to sometimes fire and cause a panic in the RX mbuf refresh
      code. This is addressed by setting interrupts late in the init
      path, and also to set all interrupts bits off at the start of that.
2011-12-10 07:08:52 +00:00

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/******************************************************************************
Copyright (c) 2001-2011, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
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notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the Intel Corporation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/
/*$FreeBSD$*/
#ifndef _IGB_H_DEFINED_
#define _IGB_H_DEFINED_
/* Tunables */
/*
* IGB_TXD: Maximum number of Transmit Descriptors
*
* This value is the number of transmit descriptors allocated by the driver.
* Increasing this value allows the driver to queue more transmits. Each
* descriptor is 16 bytes.
* Since TDLEN should be multiple of 128bytes, the number of transmit
* desscriptors should meet the following condition.
* (num_tx_desc * sizeof(struct e1000_tx_desc)) % 128 == 0
*/
#define IGB_MIN_TXD 256
#define IGB_DEFAULT_TXD 1024
#define IGB_MAX_TXD 4096
/*
* IGB_RXD: Maximum number of Transmit Descriptors
*
* This value is the number of receive descriptors allocated by the driver.
* Increasing this value allows the driver to buffer more incoming packets.
* Each descriptor is 16 bytes. A receive buffer is also allocated for each
* descriptor. The maximum MTU size is 16110.
* Since TDLEN should be multiple of 128bytes, the number of transmit
* desscriptors should meet the following condition.
* (num_tx_desc * sizeof(struct e1000_tx_desc)) % 128 == 0
*/
#define IGB_MIN_RXD 256
#define IGB_DEFAULT_RXD 1024
#define IGB_MAX_RXD 4096
/*
* IGB_TIDV - Transmit Interrupt Delay Value
* Valid Range: 0-65535 (0=off)
* Default Value: 64
* This value delays the generation of transmit interrupts in units of
* 1.024 microseconds. Transmit interrupt reduction can improve CPU
* efficiency if properly tuned for specific network traffic. If the
* system is reporting dropped transmits, this value may be set too high
* causing the driver to run out of available transmit descriptors.
*/
#define IGB_TIDV 64
/*
* IGB_TADV - Transmit Absolute Interrupt Delay Value
* Valid Range: 0-65535 (0=off)
* Default Value: 64
* This value, in units of 1.024 microseconds, limits the delay in which a
* transmit interrupt is generated. Useful only if IGB_TIDV is non-zero,
* this value ensures that an interrupt is generated after the initial
* packet is sent on the wire within the set amount of time. Proper tuning,
* along with IGB_TIDV, may improve traffic throughput in specific
* network conditions.
*/
#define IGB_TADV 64
/*
* IGB_RDTR - Receive Interrupt Delay Timer (Packet Timer)
* Valid Range: 0-65535 (0=off)
* Default Value: 0
* This value delays the generation of receive interrupts in units of 1.024
* microseconds. Receive interrupt reduction can improve CPU efficiency if
* properly tuned for specific network traffic. Increasing this value adds
* extra latency to frame reception and can end up decreasing the throughput
* of TCP traffic. If the system is reporting dropped receives, this value
* may be set too high, causing the driver to run out of available receive
* descriptors.
*
* CAUTION: When setting IGB_RDTR to a value other than 0, adapters
* may hang (stop transmitting) under certain network conditions.
* If this occurs a WATCHDOG message is logged in the system
* event log. In addition, the controller is automatically reset,
* restoring the network connection. To eliminate the potential
* for the hang ensure that IGB_RDTR is set to 0.
*/
#define IGB_RDTR 0
/*
* Receive Interrupt Absolute Delay Timer (Not valid for 82542/82543/82544)
* Valid Range: 0-65535 (0=off)
* Default Value: 64
* This value, in units of 1.024 microseconds, limits the delay in which a
* receive interrupt is generated. Useful only if IGB_RDTR is non-zero,
* this value ensures that an interrupt is generated after the initial
* packet is received within the set amount of time. Proper tuning,
* along with IGB_RDTR, may improve traffic throughput in specific network
* conditions.
*/
#define IGB_RADV 64
/*
* This parameter controls the duration of transmit watchdog timer.
*/
#define IGB_WATCHDOG (10 * hz)
/*
* This parameter controls when the driver calls the routine to reclaim
* transmit descriptors. Cleaning earlier seems a win.
*/
#define IGB_TX_CLEANUP_THRESHOLD (adapter->num_tx_desc / 2)
/*
* This parameter controls whether or not autonegotation is enabled.
* 0 - Disable autonegotiation
* 1 - Enable autonegotiation
*/
#define DO_AUTO_NEG 1
/*
* This parameter control whether or not the driver will wait for
* autonegotiation to complete.
* 1 - Wait for autonegotiation to complete
* 0 - Don't wait for autonegotiation to complete
*/
#define WAIT_FOR_AUTO_NEG_DEFAULT 0
/* Tunables -- End */
#define AUTONEG_ADV_DEFAULT (ADVERTISE_10_HALF | ADVERTISE_10_FULL | \
ADVERTISE_100_HALF | ADVERTISE_100_FULL | \
ADVERTISE_1000_FULL)
#define AUTO_ALL_MODES 0
/* PHY master/slave setting */
#define IGB_MASTER_SLAVE e1000_ms_hw_default
/*
* Micellaneous constants
*/
#define IGB_VENDOR_ID 0x8086
#define IGB_JUMBO_PBA 0x00000028
#define IGB_DEFAULT_PBA 0x00000030
#define IGB_SMARTSPEED_DOWNSHIFT 3
#define IGB_SMARTSPEED_MAX 15
#define IGB_MAX_LOOP 10
#define IGB_RX_PTHRESH (hw->mac.type <= e1000_82576 ? 16 : 8)
#define IGB_RX_HTHRESH 8
#define IGB_RX_WTHRESH 1
#define IGB_TX_PTHRESH 8
#define IGB_TX_HTHRESH 1
#define IGB_TX_WTHRESH ((hw->mac.type != e1000_82575 && \
adapter->msix_mem) ? 1 : 16)
#define MAX_NUM_MULTICAST_ADDRESSES 128
#define PCI_ANY_ID (~0U)
#define ETHER_ALIGN 2
#define IGB_TX_BUFFER_SIZE ((uint32_t) 1514)
#define IGB_FC_PAUSE_TIME 0x0680
#define IGB_EEPROM_APME 0x400;
/* Queue minimum free for use */
#define IGB_QUEUE_THRESHOLD (adapter->num_tx_desc / 8)
/* Queue bit defines */
#define IGB_QUEUE_IDLE 1
#define IGB_QUEUE_WORKING 2
#define IGB_QUEUE_HUNG 4
#define IGB_QUEUE_DEPLETED 8
/*
* TDBA/RDBA should be aligned on 16 byte boundary. But TDLEN/RDLEN should be
* multiple of 128 bytes. So we align TDBA/RDBA on 128 byte boundary. This will
* also optimize cache line size effect. H/W supports up to cache line size 128.
*/
#define IGB_DBA_ALIGN 128
#define SPEED_MODE_BIT (1<<21) /* On PCI-E MACs only */
/* PCI Config defines */
#define IGB_MSIX_BAR 3
/* Defines for printing debug information */
#define DEBUG_INIT 0
#define DEBUG_IOCTL 0
#define DEBUG_HW 0
#define INIT_DEBUGOUT(S) if (DEBUG_INIT) printf(S "\n")
#define INIT_DEBUGOUT1(S, A) if (DEBUG_INIT) printf(S "\n", A)
#define INIT_DEBUGOUT2(S, A, B) if (DEBUG_INIT) printf(S "\n", A, B)
#define IOCTL_DEBUGOUT(S) if (DEBUG_IOCTL) printf(S "\n")
#define IOCTL_DEBUGOUT1(S, A) if (DEBUG_IOCTL) printf(S "\n", A)
#define IOCTL_DEBUGOUT2(S, A, B) if (DEBUG_IOCTL) printf(S "\n", A, B)
#define HW_DEBUGOUT(S) if (DEBUG_HW) printf(S "\n")
#define HW_DEBUGOUT1(S, A) if (DEBUG_HW) printf(S "\n", A)
#define HW_DEBUGOUT2(S, A, B) if (DEBUG_HW) printf(S "\n", A, B)
#define IGB_MAX_SCATTER 64
#define IGB_VFTA_SIZE 128
#define IGB_BR_SIZE 4096 /* ring buf size */
#define IGB_TSO_SIZE (65535 + sizeof(struct ether_vlan_header))
#define IGB_TSO_SEG_SIZE 4096 /* Max dma segment size */
#define IGB_HDR_BUF 128
#define IGB_PKTTYPE_MASK 0x0000FFF0
#define ETH_ZLEN 60
#define ETH_ADDR_LEN 6
/* Offload bits in mbuf flag */
#if __FreeBSD_version >= 800000
#define CSUM_OFFLOAD (CSUM_IP|CSUM_TCP|CSUM_UDP|CSUM_SCTP)
#else
#define CSUM_OFFLOAD (CSUM_IP|CSUM_TCP|CSUM_UDP)
#endif
/* Define the starting Interrupt rate per Queue */
#define IGB_INTS_PER_SEC 8000
#define IGB_DEFAULT_ITR ((1000000/IGB_INTS_PER_SEC) << 2)
#define IGB_LINK_ITR 2000
/* Precision Time Sync (IEEE 1588) defines */
#define ETHERTYPE_IEEE1588 0x88F7
#define PICOSECS_PER_TICK 20833
#define TSYNC_PORT 319 /* UDP port for the protocol */
/*
* Bus dma allocation structure used by
* e1000_dma_malloc and e1000_dma_free.
*/
struct igb_dma_alloc {
bus_addr_t dma_paddr;
caddr_t dma_vaddr;
bus_dma_tag_t dma_tag;
bus_dmamap_t dma_map;
bus_dma_segment_t dma_seg;
int dma_nseg;
};
/*
** Driver queue struct: this is the interrupt container
** for the associated tx and rx ring.
*/
struct igb_queue {
struct adapter *adapter;
u32 msix; /* This queue's MSIX vector */
u32 eims; /* This queue's EIMS bit */
u32 eitr_setting;
struct resource *res;
void *tag;
struct tx_ring *txr;
struct rx_ring *rxr;
struct task que_task;
struct taskqueue *tq;
u64 irqs;
};
/*
* Transmit ring: one per queue
*/
struct tx_ring {
struct adapter *adapter;
u32 me;
struct mtx tx_mtx;
char mtx_name[16];
struct igb_dma_alloc txdma;
struct e1000_tx_desc *tx_base;
u32 next_avail_desc;
u32 next_to_clean;
volatile u16 tx_avail;
struct igb_tx_buffer *tx_buffers;
#if __FreeBSD_version >= 800000
struct buf_ring *br;
#endif
bus_dma_tag_t txtag;
u32 bytes;
u32 packets;
int queue_status;
int watchdog_time;
int tdt;
int tdh;
u64 no_desc_avail;
u64 tx_packets;
};
/*
* Receive ring: one per queue
*/
struct rx_ring {
struct adapter *adapter;
u32 me;
struct igb_dma_alloc rxdma;
union e1000_adv_rx_desc *rx_base;
struct lro_ctrl lro;
bool lro_enabled;
bool hdr_split;
bool discard;
struct mtx rx_mtx;
char mtx_name[16];
u32 next_to_refresh;
u32 next_to_check;
struct igb_rx_buf *rx_buffers;
bus_dma_tag_t htag; /* dma tag for rx head */
bus_dma_tag_t ptag; /* dma tag for rx packet */
/*
* First/last mbuf pointers, for
* collecting multisegment RX packets.
*/
struct mbuf *fmp;
struct mbuf *lmp;
u32 bytes;
u32 packets;
int rdt;
int rdh;
/* Soft stats */
u64 rx_split_packets;
u64 rx_discarded;
u64 rx_packets;
u64 rx_bytes;
};
struct adapter {
struct ifnet *ifp;
struct e1000_hw hw;
struct e1000_osdep osdep;
struct device *dev;
struct cdev *led_dev;
struct resource *pci_mem;
struct resource *msix_mem;
struct resource *res;
void *tag;
u32 que_mask;
int linkvec;
int link_mask;
struct task link_task;
int link_irq;
struct ifmedia media;
struct callout timer;
int msix; /* total vectors allocated */
int if_flags;
int max_frame_size;
int min_frame_size;
int pause_frames;
struct mtx core_mtx;
int igb_insert_vlan_header;
u16 num_queues;
u16 vf_ifp; /* a VF interface */
eventhandler_tag vlan_attach;
eventhandler_tag vlan_detach;
u32 num_vlans;
/* Management and WOL features */
int wol;
int has_manage;
/*
** Shadow VFTA table, this is needed because
** the real vlan filter table gets cleared during
** a soft reset and the driver needs to be able
** to repopulate it.
*/
u32 shadow_vfta[IGB_VFTA_SIZE];
/* Info about the interface */
u16 link_active;
u16 fc;
u16 link_speed;
u16 link_duplex;
u32 smartspeed;
u32 dmac;
/* Interface queues */
struct igb_queue *queues;
/*
* Transmit rings
*/
struct tx_ring *tx_rings;
u16 num_tx_desc;
/* Multicast array pointer */
u8 *mta;
/*
* Receive rings
*/
struct rx_ring *rx_rings;
bool rx_hdr_split;
u16 num_rx_desc;
int rx_process_limit;
u32 rx_mbuf_sz;
u32 rx_mask;
/* Misc stats maintained by the driver */
unsigned long dropped_pkts;
unsigned long mbuf_defrag_failed;
unsigned long mbuf_header_failed;
unsigned long mbuf_packet_failed;
unsigned long no_tx_map_avail;
unsigned long no_tx_dma_setup;
unsigned long watchdog_events;
unsigned long rx_overruns;
unsigned long device_control;
unsigned long rx_control;
unsigned long int_mask;
unsigned long eint_mask;
unsigned long packet_buf_alloc_rx;
unsigned long packet_buf_alloc_tx;
boolean_t in_detach;
#ifdef IGB_IEEE1588
/* IEEE 1588 precision time support */
struct cyclecounter cycles;
struct nettimer clock;
struct nettime_compare compare;
struct hwtstamp_ctrl hwtstamp;
#endif
void *stats;
};
/* ******************************************************************************
* vendor_info_array
*
* This array contains the list of Subvendor/Subdevice IDs on which the driver
* should load.
*
* ******************************************************************************/
typedef struct _igb_vendor_info_t {
unsigned int vendor_id;
unsigned int device_id;
unsigned int subvendor_id;
unsigned int subdevice_id;
unsigned int index;
} igb_vendor_info_t;
struct igb_tx_buffer {
int next_eop; /* Index of the desc to watch */
struct mbuf *m_head;
bus_dmamap_t map; /* bus_dma map for packet */
};
struct igb_rx_buf {
struct mbuf *m_head;
struct mbuf *m_pack;
bus_dmamap_t hmap; /* bus_dma map for header */
bus_dmamap_t pmap; /* bus_dma map for packet */
};
/*
** Find the number of unrefreshed RX descriptors
*/
static inline u16
igb_rx_unrefreshed(struct rx_ring *rxr)
{
struct adapter *adapter = rxr->adapter;
if (rxr->next_to_check > rxr->next_to_refresh)
return (rxr->next_to_check - rxr->next_to_refresh - 1);
else
return ((adapter->num_rx_desc + rxr->next_to_check) -
rxr->next_to_refresh - 1);
}
#define IGB_CORE_LOCK_INIT(_sc, _name) \
mtx_init(&(_sc)->core_mtx, _name, "IGB Core Lock", MTX_DEF)
#define IGB_CORE_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->core_mtx)
#define IGB_CORE_LOCK(_sc) mtx_lock(&(_sc)->core_mtx)
#define IGB_CORE_UNLOCK(_sc) mtx_unlock(&(_sc)->core_mtx)
#define IGB_CORE_LOCK_ASSERT(_sc) mtx_assert(&(_sc)->core_mtx, MA_OWNED)
#define IGB_TX_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->tx_mtx)
#define IGB_TX_LOCK(_sc) mtx_lock(&(_sc)->tx_mtx)
#define IGB_TX_UNLOCK(_sc) mtx_unlock(&(_sc)->tx_mtx)
#define IGB_TX_TRYLOCK(_sc) mtx_trylock(&(_sc)->tx_mtx)
#define IGB_TX_LOCK_ASSERT(_sc) mtx_assert(&(_sc)->tx_mtx, MA_OWNED)
#define IGB_RX_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->rx_mtx)
#define IGB_RX_LOCK(_sc) mtx_lock(&(_sc)->rx_mtx)
#define IGB_RX_UNLOCK(_sc) mtx_unlock(&(_sc)->rx_mtx)
#define IGB_RX_LOCK_ASSERT(_sc) mtx_assert(&(_sc)->rx_mtx, MA_OWNED)
#define UPDATE_VF_REG(reg, last, cur) \
{ \
u32 new = E1000_READ_REG(hw, reg); \
if (new < last) \
cur += 0x100000000LL; \
last = new; \
cur &= 0xFFFFFFFF00000000LL; \
cur |= new; \
}
#if __FreeBSD_version >= 800000 && __FreeBSD_version < 800504
static __inline int
drbr_needs_enqueue(struct ifnet *ifp, struct buf_ring *br)
{
#ifdef ALTQ
if (ALTQ_IS_ENABLED(&ifp->if_snd))
return (1);
#endif
return (!buf_ring_empty(br));
}
#endif
#endif /* _IGB_H_DEFINED_ */
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