/* $OpenBSD: if_igc.h,v 1.4 2024/05/21 11:19:39 bluhm Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2016 Nicole Graziano * All rights reserved. * Copyright (c) 2021 Rubicon Communications, LLC (Netgate) * * 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. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 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 _IGC_H_ #define _IGC_H_ #include #include /* * IGC_MAX_TXD: Maximum number of Transmit Descriptors * Valid Range: 128-4096 * Default Value: 1024 * 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 * descriptors should meet the following condition. * (num_tx_desc * sizeof(struct igc_tx_desc)) % 128 == 0 */ #define IGC_MIN_TXD 128 #define IGC_MAX_TXD 4096 #define IGC_DEFAULT_TXD 1024 #define IGC_DEFAULT_MULTI_TXD 4096 #define IGC_MAX_TXD 4096 /* * IGC_MAX_RXD - Maximum number of receive Descriptors * Valid Range: 128-4096 * Default Value: 1024 * 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 * descriptors should meet the following condition. * (num_tx_desc * sizeof(struct igc_tx_desc)) % 128 == 0 */ #define IGC_MIN_RXD 128 #define IGC_MAX_RXD 4096 #define IGC_DEFAULT_RXD 1024 #define IGC_DEFAULT_MULTI_RXD 4096 #define IGC_MAX_RXD 4096 /* * IGC_TIDV_VAL - 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 IGC_TIDV_VAL 64 /* * IGC_TADV_VAL - 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 IGC_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 IGC_TIDV_VAL, may improve traffic throughput in specific * network conditions. */ #define IGC_TADV_VAL 64 /* * IGC_RDTR_VAL - 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 IGC_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 IGC_RDTR is set to 0. */ #define IGC_RDTR_VAL 0 /* * Receive Interrupt Absolute Delay Timer * 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 IGC_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 IGC_RDTR, may improve traffic throughput in specific network * conditions. */ #define IGC_RADV_VAL 64 /* * This parameter controls whether or not autonegotiation is enabled. * 0 - Disable autonegotiation * 1 - Enable autonegotiation */ #define DO_AUTO_NEG true #define AUTONEG_ADV_DEFAULT \ (ADVERTISE_10_HALF | ADVERTISE_10_FULL | ADVERTISE_100_HALF | \ ADVERTISE_100_FULL | ADVERTISE_1000_FULL | ADVERTISE_2500_FULL) #define AUTO_ALL_MODES 0 /* * Miscellaneous constants */ #define MAX_NUM_MULTICAST_ADDRESSES 128 #define IGC_FC_PAUSE_TIME 0x0680 #define IGC_TXPBSIZE 20408 #define IGC_PKTTYPE_MASK 0x0000FFF0 #define IGC_DMCTLX_DCFLUSH_DIS 0x80000000 /* Disable DMA Coalesce Flush */ #define IGC_RX_PTHRESH 8 #define IGC_RX_HTHRESH 8 #define IGC_RX_WTHRESH 4 #define IGC_TX_PTHRESH 8 #define IGC_TX_HTHRESH 1 /* * 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 IGC_DBA_ALIGN 128 /* * This parameter controls the duration of transmit watchdog timer. */ #define IGC_TX_TIMEOUT 5 /* set to 5 seconds */ #define IGC_PCIREG PCI_MAPREG_START #define IGC_MAX_VECTORS 8 /* Enable/disable debugging statements in shared code */ #define DBG 0 #define DEBUGOUT(...) \ do { if (DBG) printf(__VA_ARGS__); } while (0) #define DEBUGOUT1(...) DEBUGOUT(__VA_ARGS__) #define DEBUGOUT2(...) DEBUGOUT(__VA_ARGS__) #define DEBUGOUT3(...) DEBUGOUT(__VA_ARGS__) #define DEBUGOUT7(...) DEBUGOUT(__VA_ARGS__) #define DEBUGFUNC(F) DEBUGOUT(F "\n") /* Compatibility glue. */ #define roundup2(size, unit) (((size) + (unit) - 1) & ~((unit) - 1)) #define msec_delay(x) DELAY(1000 * (x)) #define IGC_MAX_SCATTER 40 #define IGC_TSO_SIZE 65535 #define MAX_INTS_PER_SEC 8000 #define DEFAULT_ITR (1000000000/(MAX_INTS_PER_SEC * 256)) /* Forward declaration. */ struct igc_hw; struct kstat; struct igc_osdep { bus_dma_tag_t os_dmat; bus_space_tag_t os_memt; bus_space_handle_t os_memh; bus_size_t os_memsize; bus_addr_t os_membase; void *os_sc; struct pci_attach_args os_pa; }; struct igc_tx_buf { uint32_t eop_index; struct mbuf *m_head; bus_dmamap_t map; }; struct igc_rx_buf { struct mbuf *buf; struct mbuf *fmp; /* First mbuf pointers. */ bus_dmamap_t map; }; /* * Bus dma allocation structure used by igc_dma_malloc and igc_dma_free. */ struct igc_dma_alloc { caddr_t dma_vaddr; bus_dma_tag_t dma_tag; bus_dmamap_t dma_map; bus_dma_segment_t dma_seg; bus_size_t dma_size; int dma_nseg; }; /* * Driver queue struct: this is the interrupt container * for the associated tx and rx ring. */ struct igc_queue { struct igc_softc *sc; uint32_t msix; uint32_t eims; uint32_t eitr_setting; char name[16]; pci_intr_handle_t ih; void *tag; struct igc_txring *txr; struct igc_rxring *rxr; }; /* * The transmit ring, one per tx queue. */ struct igc_txring { struct igc_softc *sc; struct ifqueue *ifq; uint32_t me; uint32_t watchdog_timer; union igc_adv_tx_desc *tx_base; struct igc_tx_buf *tx_buffers; struct igc_dma_alloc txdma; uint32_t next_avail_desc; uint32_t next_to_clean; bus_dma_tag_t txtag; }; /* * The Receive ring, one per rx queue. */ struct igc_rxring { struct igc_softc *sc; struct ifiqueue *ifiq; uint32_t me; union igc_adv_rx_desc *rx_base; struct igc_rx_buf *rx_buffers; struct igc_dma_alloc rxdma; uint32_t last_desc_filled; uint32_t next_to_check; struct timeout rx_refill; struct if_rxring rx_ring; }; /* Our adapter structure. */ struct igc_softc { struct device sc_dev; struct arpcom sc_ac; struct ifmedia media; struct intrmap *sc_intrmap; struct igc_osdep osdep; struct igc_hw hw; uint16_t fc; uint16_t link_active; uint16_t link_speed; uint16_t link_duplex; uint32_t dmac; void *tag; int num_tx_desc; int num_rx_desc; uint32_t max_frame_size; uint32_t rx_mbuf_sz; uint32_t linkvec; uint32_t msix_linkmask; uint32_t msix_queuesmask; unsigned int sc_nqueues; struct igc_queue *queues; struct igc_txring *tx_rings; struct igc_rxring *rx_rings; /* Multicast array memory */ uint8_t *mta; /* Counters */ struct mutex ks_mtx; struct timeout ks_tmo; struct kstat *ks; }; #define DEVNAME(_sc) ((_sc)->sc_dev.dv_xname) /* Register READ/WRITE macros */ #define IGC_WRITE_FLUSH(a) IGC_READ_REG(a, IGC_STATUS) #define IGC_READ_REG(a, reg) \ bus_space_read_4(((struct igc_osdep *)(a)->back)->os_memt, \ ((struct igc_osdep *)(a)->back)->os_memh, reg) #define IGC_WRITE_REG(a, reg, value) \ bus_space_write_4(((struct igc_osdep *)(a)->back)->os_memt, \ ((struct igc_osdep *)(a)->back)->os_memh, reg, value) #define IGC_READ_REG_ARRAY(a, reg, off) \ bus_space_read_4(((struct igc_osdep *)(a)->back)->os_memt, \ ((struct igc_osdep *)(a)->back)->os_memh, (reg + ((off) << 2))) #define IGC_WRITE_REG_ARRAY(a, reg, off, value) \ bus_space_write_4(((struct igc_osdep *)(a)->back)->os_memt, \ ((struct igc_osdep *)(a)->back)->os_memh, \ (reg + ((off) << 2)),value) #endif /* _IGC_H_ */