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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2015 Bjoern A. Zeeb
* Copyright (c) 2020 Denis Salopek
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-11-C-0249
* ("MRC2"), as part of the DARPA MRC research programme.
*
* 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 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
* 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.
*/
/* $FreeBSD$ */
#define DEFAULT_ETHER_ADDRESS "\02SUME\00"
#define SUME_ETH_DEVICE_NAME "sume"
#define MAX_IFC_NAME_LEN 8
#define SUME_NPORTS 4
#define SUME_IOCTL_CMD_WRITE_REG (SIOCGPRIVATE_0)
#define SUME_IOCTL_CMD_READ_REG (SIOCGPRIVATE_1)
#define SUME_LOCK(adapter) mtx_lock(&adapter->lock);
#define SUME_UNLOCK(adapter) mtx_unlock(&adapter->lock);
/* Currently SUME only uses 2 fixed channels for all port traffic and regs. */
#define SUME_RIFFA_CHANNEL_DATA 0
#define SUME_RIFFA_CHANNEL_REG 1
#define SUME_RIFFA_CHANNELS 2
/* RIFFA constants. */
#define RIFFA_MAX_CHNLS 12
#define RIFFA_MAX_BUS_WIDTH_PARAM 4
#define RIFFA_SG_BUF_SIZE (4*1024)
#define RIFFA_SG_ELEMS 200
/* RIFFA register offsets. */
#define RIFFA_RX_SG_LEN_REG_OFF 0x0
#define RIFFA_RX_SG_ADDR_LO_REG_OFF 0x1
#define RIFFA_RX_SG_ADDR_HI_REG_OFF 0x2
#define RIFFA_RX_LEN_REG_OFF 0x3
#define RIFFA_RX_OFFLAST_REG_OFF 0x4
#define RIFFA_TX_SG_LEN_REG_OFF 0x5
#define RIFFA_TX_SG_ADDR_LO_REG_OFF 0x6
#define RIFFA_TX_SG_ADDR_HI_REG_OFF 0x7
#define RIFFA_TX_LEN_REG_OFF 0x8
#define RIFFA_TX_OFFLAST_REG_OFF 0x9
#define RIFFA_INFO_REG_OFF 0xA
#define RIFFA_IRQ_REG0_OFF 0xB
#define RIFFA_IRQ_REG1_OFF 0xC
#define RIFFA_RX_TNFR_LEN_REG_OFF 0xD
#define RIFFA_TX_TNFR_LEN_REG_OFF 0xE
#define RIFFA_CHNL_REG(c, o) ((c << 4) + o)
/*
* RIFFA state machine;
* rather than using complex circular buffers for 1 transaction.
*/
#define SUME_RIFFA_CHAN_STATE_IDLE 0x01
#define SUME_RIFFA_CHAN_STATE_READY 0x02
#define SUME_RIFFA_CHAN_STATE_READ 0x04
#define SUME_RIFFA_CHAN_STATE_LEN 0x08
/* Accessor macros. */
#define SUME_OFFLAST ((0 << 1) | (1 & 0x01))
#define SUME_RIFFA_LAST(offlast) ((offlast) & 0x01)
#define SUME_RIFFA_OFFSET(offlast) ((uint64_t)((offlast) >> 1) << 2)
#define SUME_RIFFA_LEN(len) ((uint64_t)(len) << 2)
#define SUME_RIFFA_LO_ADDR(addr) (addr & 0xFFFFFFFF)
#define SUME_RIFFA_HI_ADDR(addr) ((addr >> 32) & 0xFFFFFFFF)
/* Vector bits. */
#define SUME_MSI_RXQUE (1 << 0)
#define SUME_MSI_RXBUF (1 << 1)
#define SUME_MSI_RXDONE (1 << 2)
#define SUME_MSI_TXBUF (1 << 3)
#define SUME_MSI_TXDONE (1 << 4)
/* Invalid vector. */
#define SUME_INVALID_VECT 0xc0000000
/* Module register data (packet counters, link status...) */
#define SUME_MOD0_REG_BASE 0x44040000
#define SUME_MOD_REG(port) (SUME_MOD0_REG_BASE + 0x10000 * port)
#define SUME_RESET_OFFSET 0x8
#define SUME_PKTIN_OFFSET 0x18
#define SUME_PKTOUT_OFFSET 0x1c
#define SUME_STATUS_OFFSET 0x48
#define SUME_RESET_ADDR(p) (SUME_MOD_REG(p) + SUME_RESET_OFFSET)
#define SUME_STAT_RX_ADDR(p) (SUME_MOD_REG(p) + SUME_PKTIN_OFFSET)
#define SUME_STAT_TX_ADDR(p) (SUME_MOD_REG(p) + SUME_PKTOUT_OFFSET)
#define SUME_STATUS_ADDR(p) (SUME_MOD_REG(p) + SUME_STATUS_OFFSET)
#define SUME_LINK_STATUS(val) ((val >> 12) & 0x1)
/* Various bits and pieces. */
#define SUME_RIFFA_MAGIC 0xcafe
#define SUME_MR_WRITE 0x1f
#define SUME_MR_READ 0x00
#define SUME_INIT_RTAG -3
#define SUME_DPORT_MASK 0xaa
#define SUME_MIN_PKT_SIZE (ETHER_MIN_LEN - ETHER_CRC_LEN)
struct irq {
uint32_t rid;
struct resource *res;
void *tag;
} __aligned(CACHE_LINE_SIZE);
struct nf_stats {
uint64_t hw_rx_packets;
uint64_t hw_tx_packets;
uint64_t ifc_down_bytes;
uint64_t ifc_down_packets;
uint64_t rx_bytes;
uint64_t rx_dropped;
uint64_t rx_packets;
uint64_t tx_bytes;
uint64_t tx_dropped;
uint64_t tx_packets;
};
struct riffa_chnl_dir {
uint32_t state;
bus_dma_tag_t ch_tag;
bus_dmamap_t ch_map;
char *buf_addr; /* bouncebuf addresses+len. */
bus_addr_t buf_hw_addr; /* -- " -- mapped. */
uint32_t num_sg;
uint32_t event; /* Used for modreg r/w */
uint32_t len; /* words */
uint32_t offlast;
uint32_t recovery;
uint32_t rtag;
};
struct sume_ifreq {
uint32_t addr;
uint32_t val;
};
struct nf_priv {
struct sume_adapter *adapter;
struct ifmedia media;
struct nf_stats stats;
uint32_t unit;
uint32_t port;
uint32_t link_up;
};
struct sume_adapter {
struct mtx lock;
uint32_t running;
uint32_t rid;
struct riffa_chnl_dir **recv;
struct riffa_chnl_dir **send;
device_t dev;
struct ifnet *ifp[SUME_NPORTS];
struct resource *bar0_addr;
bus_space_tag_t bt;
bus_space_handle_t bh;
bus_size_t bar0_len;
struct irq irq;
struct callout timer;
struct task stat_task;
struct taskqueue *tq;
uint64_t bytes_err;
uint64_t packets_err;
uint32_t last_ifc;
uint32_t num_sg;
uint32_t sg_buf_size;
uint32_t sume_debug;
uint32_t wd_counter;
};
/* SUME metadata:
* sport - not used for RX. For TX, set to 0x02, 0x08, 0x20, 0x80, depending on
* the sending interface (nf0, nf1, nf2 or nf3).
* dport - For RX, is set to 0x02, 0x08, 0x20, 0x80, depending on the receiving
* interface (nf0, nf1, nf2 or nf3). For TX, set to 0x01, 0x04, 0x10, 0x40,
* depending on the sending HW interface (nf0, nf1, nf2 or nf3).
* plen - length of the send/receive packet data (in bytes)
* magic - SUME hardcoded magic number which should be 0xcafe
* t1, t1 - could be used for timestamping by SUME
*/
struct nf_metadata {
uint16_t sport;
uint16_t dport;
uint16_t plen;
uint16_t magic;
uint32_t t1;
uint32_t t2;
};
/* Used for ioctl communication with the rwaxi program used to read/write SUME
* internally defined register data.
* addr - address of the SUME module register to read/write
* val - value to write/read to/from the register
* rtag - returned on read: transaction tag, for syncronization
* optype - 0x1f when writing, 0x00 for reading
*/
struct nf_regop_data {
uint32_t addr;
uint32_t val;
uint32_t rtag;
uint32_t optype;
};
/* Our bouncebuffer "descriptor". This holds our physical address (lower and
* upper values) of the beginning of the DMA data to RX/TX. The len is number
* of words to transmit.
*/
struct nf_bb_desc {
uint32_t lower;
uint32_t upper;
uint32_t len;
};