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Diffstat (limited to 'nuttx/drivers/net/e1000.c')
| -rw-r--r-- | nuttx/drivers/net/e1000.c | 1042 |
1 files changed, 0 insertions, 1042 deletions
diff --git a/nuttx/drivers/net/e1000.c b/nuttx/drivers/net/e1000.c deleted file mode 100644 index cae6f39b4..000000000 --- a/nuttx/drivers/net/e1000.c +++ /dev/null @@ -1,1042 +0,0 @@ -/**************************************************************************** - * drivers/net/e1000.c - * - * Copyright (C) 2011 Yu Qiang. All rights reserved. - * Author: Yu Qiang <yuq825@gmail.com> - * - * This file is a part of NuttX: - * - * Copyright (C) 2011 Gregory Nutt. 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. - * 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. - * 3. Neither the name NuttX 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 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. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> -#include <nuttx/kmalloc.h> -#include <stdint.h> -#include <stdbool.h> -#include <time.h> -#include <debug.h> -#include <wdog.h> -#include <errno.h> - -#include <nuttx/irq.h> -#include <nuttx/arch.h> - -#include <nuttx/net/uip/uip.h> -#include <nuttx/net/uip/uip-arp.h> -#include <nuttx/net/uip/uip-arch.h> - -#include <rgmp/pmap.h> -#include <rgmp/string.h> -#include <rgmp/stdio.h> -#include <rgmp/utils.h> -#include <rgmp/arch/pci.h> -#include <rgmp/memio.h> -#include "e1000.h" - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/* TX poll deley = 1 seconds. CLK_TCK is the number of clock ticks per second */ - -#define E1000_WDDELAY (1*CLK_TCK) -#define E1000_POLLHSEC (1*2) - -/* TX timeout = 1 minute */ - -#define E1000_TXTIMEOUT (60*CLK_TCK) - -/* This is a helper pointer for accessing the contents of the Ethernet header */ - -#define BUF ((struct uip_eth_hdr *)e1000->uip_dev.d_buf) - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -struct tx_ring { - struct tx_desc *desc; - char *buf; - int tail; // where to write desc -}; - -struct rx_ring { - struct rx_desc *desc; - char *buf; - int head; // where to read - int tail; // where to release free desc - int free; // number of freed desc -}; - -struct e1000_dev { - uint32_t phy_mem_base; - uint32_t io_mem_base; - uint32_t mem_size; - int pci_dev_id; - uint16_t pci_addr; - unsigned char src_mac[6]; - unsigned char dst_mac[6]; - struct irq_action int_desc; - struct tx_ring tx_ring; - struct rx_ring rx_ring; - struct e1000_dev *next; - - // NuttX net data - bool bifup; /* true:ifup false:ifdown */ - WDOG_ID txpoll; /* TX poll timer */ - WDOG_ID txtimeout; /* TX timeout timer */ - - /* This holds the information visible to uIP/NuttX */ - - struct uip_driver_s uip_dev; /* Interface understood by uIP */ -}; - -struct e1000_dev_head { - struct e1000_dev *next; -}; - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -static struct e1000_dev_head e1000_list = {0}; - -/**************************************************************************** - * Private Function Prototypes - ****************************************************************************/ - -/* Common TX logic */ - -static int e1000_transmit(struct e1000_dev *e1000); -static int e1000_uiptxpoll(struct uip_driver_s *dev); - -/* Interrupt handling */ - -static void e1000_receive(struct e1000_dev *e1000); - -/* Watchdog timer expirations */ - -static void e1000_polltimer(int argc, uint32_t arg, ...); -static void e1000_txtimeout(int argc, uint32_t arg, ...); - -/* NuttX callback functions */ - -static int e1000_ifup(struct uip_driver_s *dev); -static int e1000_ifdown(struct uip_driver_s *dev); -static int e1000_txavail(struct uip_driver_s *dev); -#ifdef CONFIG_NET_IGMP -static int e1000_addmac(struct uip_driver_s *dev, const uint8_t *mac); -static int e1000_rmmac(struct uip_driver_s *dev, const uint8_t *mac); -#endif - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -static inline void e1000_outl(struct e1000_dev *dev, int reg, uint32_t val) -{ - writel(dev->io_mem_base+reg, val); -} - -static inline uint32_t e1000_inl(struct e1000_dev *dev, int reg) -{ - return readl(dev->io_mem_base+reg); -} - -/****************************** e1000 driver ********************************/ - -void e1000_reset(struct e1000_dev *dev) -{ - uint32_t dev_control; - - // Reset the network controller hardware - dev_control = 0; - dev_control |= (1<<0); // FD-bit (Full Duplex) - dev_control |= (0<<2); // GIOMD-bit (GIO Master Disable) - dev_control |= (1<<3); // LRST-bit (Link Reset) - dev_control |= (1<<6); // SLU-bit (Set Link Up) - dev_control |= (2<<8); // SPEED=2 (1000Mbps) - dev_control |= (0<<11); // FRCSPD-bit (Force Speed) - dev_control |= (0<<12); // FRCDPLX-bit (Force Duplex) - dev_control |= (0<<20); // ADVD3WUC-bit (Advertise D3 Wake Up Cap) - dev_control |= (1<<26); // RST-bit (Device Reset) - dev_control |= (1<<27); // RFCE-bit (Receive Flow Control Enable) - dev_control |= (1<<28); // TFCE-bit (Transmit Flow Control Enable) - dev_control |= (0<<30); // VME-bit (VLAN Mode Enable) - dev_control |= (0<<31); // PHY_RST-bit (PHY Reset) - - e1000_outl(dev, E1000_IMC, 0xFFFFFFFF); - e1000_outl(dev, E1000_STATUS, 0x00000000); - e1000_outl(dev, E1000_CTRL, dev_control); - dev_control &= ~(1<<26); // clear RST-bit (Device Reset) - e1000_outl(dev, E1000_CTRL, dev_control); - up_mdelay(10); - e1000_outl(dev, E1000_CTRL_EXT, 0x001401C0); - e1000_outl(dev, E1000_IMC, 0xFFFFFFFF); -} - -void e1000_turn_on(struct e1000_dev *dev) -{ - int tx_control, rx_control; - uint32_t ims = 0; - - // turn on the controller's receive engine - rx_control = e1000_inl(dev, E1000_RCTL); - rx_control |= (1<<1); - e1000_outl(dev, E1000_RCTL, rx_control); - - // turn on the controller's transmit engine - tx_control = e1000_inl(dev, E1000_TCTL); - tx_control |= (1<<1); - e1000_outl(dev, E1000_TCTL, tx_control); - - // enable the controller's interrupts - e1000_outl(dev, E1000_ICR, 0xFFFFFFFF); - e1000_outl(dev, E1000_IMC, 0xFFFFFFFF); - - ims |= 1<<0; // TXDW - ims |= 1<<1; // TXQE - ims |= 1<<2; // LSC - ims |= 1<<4; // RXDMT0 - ims |= 1<<7; // RXT0 - e1000_outl(dev, E1000_IMS, ims); -} - -void e1000_turn_off(struct e1000_dev *dev) -{ - int tx_control, rx_control; - - // turn off the controller's receive engine - rx_control = e1000_inl(dev, E1000_RCTL); - rx_control &= ~(1<<1); - e1000_outl(dev, E1000_RCTL, rx_control); - - // turn off the controller's transmit engine - tx_control = e1000_inl(dev, E1000_TCTL); - tx_control &= ~(1<<1); - e1000_outl(dev, E1000_TCTL, tx_control); - - // turn off the controller's interrupts - e1000_outl(dev, E1000_IMC, 0xFFFFFFFF); -} - -void e1000_init(struct e1000_dev *dev) -{ - uint32_t rxd_phys, txd_phys, kmem_phys; - uint32_t rx_control, tx_control; - uint32_t pba; - int i; - - e1000_reset(dev); - - // configure the controller's 'receive' engine - rx_control = 0; - rx_control |= (0<<1); // EN-bit (Enable) - rx_control |= (0<<2); // SPB-bit (Store Bad Packets) - rx_control |= (0<<3); // UPE-bit (Unicast Promiscuous Mode) - rx_control |= (1<<4); // MPE-bit (Multicast Promiscuous Mode) - rx_control |= (0<<5); // LPE-bit (Long Packet Enable) - rx_control |= (0<<6); // LBM=0 (Loop-Back Mode) - rx_control |= (0<<8); // RDMTS=0 (Rx Descriptor Min Threshold Size) - rx_control |= (0<<10); // DTYPE=0 (Descriptor Type) - rx_control |= (0<<12); // MO=0 (Multicast Offset) - rx_control |= (1<<15); // BAM-bit (Broadcast Address Mode) - rx_control |= (0<<16); // BSIZE=0 (Buffer Size = 2048) - rx_control |= (0<<18); // VLE-bit (VLAN filter Enable) - rx_control |= (0<<19); // CFIEN-bit (Canonical Form Indicator Enable) - rx_control |= (0<<20); // CFI-bit (Canonical Form Indicator) - rx_control |= (1<<22); // DPF-bit (Discard Pause Frames) - rx_control |= (0<<23); // PMCF-bit (Pass MAC Control Frames) - rx_control |= (0<<25); // BSEX=0 (Buffer Size EXtension) - rx_control |= (1<<26); // SECRC-bit (Strip Ethernet CRC) - rx_control |= (0<<27); // FLEXBUF=0 (Flexible Buffer size) - e1000_outl(dev, E1000_RCTL, rx_control); - - // configure the controller's 'transmit' engine - tx_control = 0; - tx_control |= (0<<1); // EN-bit (Enable) - tx_control |= (1<<3); // PSP-bit (Pad Short Packets) - tx_control |= (15<<4); // CT=15 (Collision Threshold) - tx_control |= (63<<12); // COLD=63 (Collision Distance) - tx_control |= (0<<22); // SWXOFF-bit (Software XOFF) - tx_control |= (1<<24); // RTLC-bit (Re-Transmit on Late Collision) - tx_control |= (0<<25); // UNORTX-bit (Underrun No Re-Transmit) - tx_control |= (0<<26); // TXCSCMT=0 (TxDesc Mininum Threshold) - tx_control |= (0<<28); // MULR-bit (Multiple Request Support) - e1000_outl(dev, E1000_TCTL, tx_control); - - // hardware flow control - pba = e1000_inl(dev, E1000_PBA); - // get receive FIFO size - pba = (pba & 0x000000ff)<<10; - e1000_outl(dev, E1000_FCAL, 0x00C28001); - e1000_outl(dev, E1000_FCAH, 0x00000100); - e1000_outl(dev, E1000_FCT, 0x00008808); - e1000_outl(dev, E1000_FCTTV, 0x00000680); - e1000_outl(dev, E1000_FCRTL, (pba*8/10)|0x80000000); - e1000_outl(dev, E1000_FCRTH, pba*9/10); - - // setup tx rings - txd_phys = PADDR((uintptr_t)dev->tx_ring.desc); - kmem_phys = PADDR((uintptr_t)dev->tx_ring.buf); - for (i=0; i<CONFIG_E1000_N_TX_DESC; i++,kmem_phys+=CONFIG_E1000_BUFF_SIZE) { - dev->tx_ring.desc[i].base_address = kmem_phys; - dev->tx_ring.desc[i].packet_length = 0; - dev->tx_ring.desc[i].cksum_offset = 0; - dev->tx_ring.desc[i].cksum_origin = 0; - dev->tx_ring.desc[i].desc_status = 1; - dev->tx_ring.desc[i].desc_command = (1<<0)|(1<<1)|(1<<3); - dev->tx_ring.desc[i].special_info = 0; - } - dev->tx_ring.tail = 0; - e1000_outl(dev, E1000_TDT, 0); - e1000_outl(dev, E1000_TDH, 0); - // tell controller the location, size, and fetch-policy for Tx queue - e1000_outl(dev, E1000_TDBAL, txd_phys); - e1000_outl(dev, E1000_TDBAH, 0x00000000); - e1000_outl(dev, E1000_TDLEN, CONFIG_E1000_N_TX_DESC*16); - e1000_outl(dev, E1000_TXDCTL, 0x01010000); - - // setup rx rings - rxd_phys = PADDR((uintptr_t)dev->rx_ring.desc); - kmem_phys = PADDR((uintptr_t)dev->rx_ring.buf); - for (i=0; i<CONFIG_E1000_N_RX_DESC; i++,kmem_phys+=CONFIG_E1000_BUFF_SIZE) { - dev->rx_ring.desc[i].base_address = kmem_phys; - dev->rx_ring.desc[i].packet_length = 0; - dev->rx_ring.desc[i].packet_cksum = 0; - dev->rx_ring.desc[i].desc_status = 0; - dev->rx_ring.desc[i].desc_errors = 0; - dev->rx_ring.desc[i].vlan_tag = 0; - } - dev->rx_ring.head = 0; - dev->rx_ring.tail = CONFIG_E1000_N_RX_DESC-1; - dev->rx_ring.free = 0; - // give the controller ownership of all receive descriptors - e1000_outl(dev, E1000_RDH, 0); - e1000_outl(dev, E1000_RDT, CONFIG_E1000_N_RX_DESC-1); - // tell controller the location, size, and fetch-policy for RX queue - e1000_outl(dev, E1000_RDBAL, rxd_phys); - e1000_outl(dev, E1000_RDBAH, 0x00000000); - e1000_outl(dev, E1000_RDLEN, CONFIG_E1000_N_RX_DESC*16); - e1000_outl(dev, E1000_RXDCTL, 0x01010000); - - e1000_turn_on(dev); -} - -/**************************************************************************** - * Function: e1000_transmit - * - * Description: - * Start hardware transmission. Called either from the txdone interrupt - * handling or from watchdog based polling. - * - * Parameters: - * e1000 - Reference to the driver state structure - * - * Returned Value: - * OK on success; a negated errno on failure - * - * Assumptions: - * May or may not be called from an interrupt handler. In either case, - * global interrupts are disabled, either explicitly or indirectly through - * interrupt handling logic. - * - ****************************************************************************/ - -static int e1000_transmit(struct e1000_dev *e1000) -{ - int tail = e1000->tx_ring.tail; - unsigned char *cp = (unsigned char *) - (e1000->tx_ring.buf + tail * CONFIG_E1000_BUFF_SIZE); - int count = e1000->uip_dev.d_len; - - /* Verify that the hardware is ready to send another packet. If we get - * here, then we are committed to sending a packet; Higher level logic - * must have assured that there is not transmission in progress. - */ - - if (!e1000->tx_ring.desc[tail].desc_status) - return -1; - - /* Increment statistics */ - - /* Send the packet: address=skel->sk_dev.d_buf, length=skel->sk_dev.d_len */ - memcpy(cp, e1000->uip_dev.d_buf, e1000->uip_dev.d_len); - - // prepare the transmit-descriptor - e1000->tx_ring.desc[tail].packet_length = count<60 ? 60:count; - e1000->tx_ring.desc[tail].desc_status = 0; - - // give ownership of this descriptor to the network controller - tail = (tail + 1) % CONFIG_E1000_N_TX_DESC; - e1000->tx_ring.tail = tail; - e1000_outl(e1000, E1000_TDT, tail); - - /* Enable Tx interrupts */ - - /* Setup the TX timeout watchdog (perhaps restarting the timer) */ - - wd_start(e1000->txtimeout, E1000_TXTIMEOUT, e1000_txtimeout, 1, (uint32_t)e1000); - return OK; -} - -/**************************************************************************** - * Function: e1000_uiptxpoll - * - * Description: - * The transmitter is available, check if uIP has any outgoing packets ready - * to send. This is a callback from uip_poll(). uip_poll() may be called: - * - * 1. When the preceding TX packet send is complete, - * 2. When the preceding TX packet send timesout and the interface is reset - * 3. During normal TX polling - * - * Parameters: - * dev - Reference to the NuttX driver state structure - * - * Returned Value: - * OK on success; a negated errno on failure - * - * Assumptions: - * May or may not be called from an interrupt handler. In either case, - * global interrupts are disabled, either explicitly or indirectly through - * interrupt handling logic. - * - ****************************************************************************/ - -static int e1000_uiptxpoll(struct uip_driver_s *dev) -{ - struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private; - int tail = e1000->tx_ring.tail; - - /* If the polling resulted in data that should be sent out on the network, - * the field d_len is set to a value > 0. - */ - - if (e1000->uip_dev.d_len > 0) { - uip_arp_out(&e1000->uip_dev); - e1000_transmit(e1000); - - /* Check if there is room in the device to hold another packet. If not, - * return a non-zero value to terminate the poll. - */ - if (!e1000->tx_ring.desc[tail].desc_status) - return -1; - } - - /* If zero is returned, the polling will continue until all connections have - * been examined. - */ - - return 0; -} - -/**************************************************************************** - * Function: e1000_receive - * - * Description: - * An interrupt was received indicating the availability of a new RX packet - * - * Parameters: - * e1000 - Reference to the driver state structure - * - * Returned Value: - * None - * - * Assumptions: - * Global interrupts are disabled by interrupt handling logic. - * - ****************************************************************************/ - -static void e1000_receive(struct e1000_dev *e1000) -{ - int head = e1000->rx_ring.head; - unsigned char *cp = (unsigned char *) - (e1000->rx_ring.buf + head * CONFIG_E1000_BUFF_SIZE); - int cnt; - - while (e1000->rx_ring.desc[head].desc_status) { - - /* Check for errors and update statistics */ - - // Here we do not handle packets that exceed packet-buffer size - if ((e1000->rx_ring.desc[head].desc_status & 3) == 1) { - cprintf("NIC READ: Oversized packet\n"); - goto next; - } - - /* Check if the packet is a valid size for the uIP buffer configuration */ - - // get the number of actual data-bytes in this packet - cnt = e1000->rx_ring.desc[head].packet_length; - - if (cnt > CONFIG_NET_BUFSIZE || cnt < 14) { - cprintf("NIC READ: invalid package size\n"); - goto next; - } - - /* Copy the data data from the hardware to e1000->uip_dev.d_buf. Set - * amount of data in e1000->uip_dev.d_len - */ - - // now we try to copy these data-bytes to the UIP buffer - memcpy(e1000->uip_dev.d_buf, cp, cnt); - e1000->uip_dev.d_len = cnt; - - /* We only accept IP packets of the configured type and ARP packets */ - -#ifdef CONFIG_NET_IPv6 - if (BUF->type == HTONS(UIP_ETHTYPE_IP6)) -#else - if (BUF->type == HTONS(UIP_ETHTYPE_IP)) -#endif - { - uip_arp_ipin(&e1000->uip_dev); - uip_input(&e1000->uip_dev); - - /* If the above function invocation resulted in data that should be - * sent out on the network, the field d_len will set to a value > 0. - */ - - if (e1000->uip_dev.d_len > 0) { - uip_arp_out(&e1000->uip_dev); - e1000_transmit(e1000); - } - } - else if (BUF->type == htons(UIP_ETHTYPE_ARP)) { - uip_arp_arpin(&e1000->uip_dev); - - /* If the above function invocation resulted in data that should be - * sent out on the network, the field d_len will set to a value > 0. - */ - - if (e1000->uip_dev.d_len > 0) { - e1000_transmit(e1000); - } - } - - next: - e1000->rx_ring.desc[head].desc_status = 0; - e1000->rx_ring.head = (head + 1) % CONFIG_E1000_N_RX_DESC; - e1000->rx_ring.free++; - head = e1000->rx_ring.head; - cp = (unsigned char *)(e1000->rx_ring.buf + head * CONFIG_E1000_BUFF_SIZE); - } -} - -/**************************************************************************** - * Function: e1000_txtimeout - * - * Description: - * Our TX watchdog timed out. Called from the timer interrupt handler. - * The last TX never completed. Reset the hardware and start again. - * - * Parameters: - * argc - The number of available arguments - * arg - The first argument - * - * Returned Value: - * None - * - * Assumptions: - * Global interrupts are disabled by the watchdog logic. - * - ****************************************************************************/ - -static void e1000_txtimeout(int argc, uint32_t arg, ...) -{ - struct e1000_dev *e1000 = (struct e1000_dev *)arg; - - /* Increment statistics and dump debug info */ - - /* Then reset the hardware */ - e1000_init(e1000); - - /* Then poll uIP for new XMIT data */ - - (void)uip_poll(&e1000->uip_dev, e1000_uiptxpoll); -} - -/**************************************************************************** - * Function: e1000_polltimer - * - * Description: - * Periodic timer handler. Called from the timer interrupt handler. - * - * Parameters: - * argc - The number of available arguments - * arg - The first argument - * - * Returned Value: - * None - * - * Assumptions: - * Global interrupts are disabled by the watchdog logic. - * - ****************************************************************************/ - -static void e1000_polltimer(int argc, uint32_t arg, ...) -{ - struct e1000_dev *e1000 = (struct e1000_dev *)arg; - int tail = e1000->tx_ring.tail; - - /* Check if there is room in the send another TX packet. We cannot perform - * the TX poll if he are unable to accept another packet for transmission. - */ - if (!e1000->tx_ring.desc[tail].desc_status) - return; - - /* If so, update TCP timing states and poll uIP for new XMIT data. Hmmm.. - * might be bug here. Does this mean if there is a transmit in progress, - * we will missing TCP time state updates? - */ - - (void)uip_timer(&e1000->uip_dev, e1000_uiptxpoll, E1000_POLLHSEC); - - /* Setup the watchdog poll timer again */ - - (void)wd_start(e1000->txpoll, E1000_WDDELAY, e1000_polltimer, 1, arg); -} - -/**************************************************************************** - * Function: e1000_ifup - * - * Description: - * NuttX Callback: Bring up the Ethernet interface when an IP address is - * provided - * - * Parameters: - * dev - Reference to the NuttX driver state structure - * - * Returned Value: - * None - * - * Assumptions: - * - ****************************************************************************/ - -static int e1000_ifup(struct uip_driver_s *dev) -{ - struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private; - - ndbg("Bringing up: %d.%d.%d.%d\n", - dev->d_ipaddr & 0xff, (dev->d_ipaddr >> 8) & 0xff, - (dev->d_ipaddr >> 16) & 0xff, dev->d_ipaddr >> 24 ); - - /* Initialize PHYs, the Ethernet interface, and setup up Ethernet interrupts */ - e1000_init(e1000); - - /* Set and activate a timer process */ - - (void)wd_start(e1000->txpoll, E1000_WDDELAY, e1000_polltimer, 1, (uint32_t)e1000); - - if (e1000_inl(e1000, E1000_STATUS) & 2) - e1000->bifup = true; - else - e1000->bifup = false; - - return OK; -} - -/**************************************************************************** - * Function: e1000_ifdown - * - * Description: - * NuttX Callback: Stop the interface. - * - * Parameters: - * dev - Reference to the NuttX driver state structure - * - * Returned Value: - * None - * - * Assumptions: - * - ****************************************************************************/ - -static int e1000_ifdown(struct uip_driver_s *dev) -{ - struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private; - irqstate_t flags; - - /* Disable the Ethernet interrupt */ - - flags = irqsave(); - - e1000_turn_off(e1000); - - /* Cancel the TX poll timer and TX timeout timers */ - - wd_cancel(e1000->txpoll); - wd_cancel(e1000->txtimeout); - - /* Put the the EMAC is its reset, non-operational state. This should be - * a known configuration that will guarantee the skel_ifup() always - * successfully brings the interface back up. - */ - //e1000_reset(e1000); - - /* Mark the device "down" */ - - e1000->bifup = false; - irqrestore(flags); - - return OK; -} - -/**************************************************************************** - * Function: e1000_txavail - * - * Description: - * Driver callback invoked when new TX data is available. This is a - * stimulus perform an out-of-cycle poll and, thereby, reduce the TX - * latency. - * - * Parameters: - * dev - Reference to the NuttX driver state structure - * - * Returned Value: - * None - * - * Assumptions: - * Called in normal user mode - * - ****************************************************************************/ - -static int e1000_txavail(struct uip_driver_s *dev) -{ - struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private; - int tail = e1000->tx_ring.tail; - irqstate_t flags; - - /* Disable interrupts because this function may be called from interrupt - * level processing. - */ - - flags = irqsave(); - - /* Ignore the notification if the interface is not yet up */ - - if (e1000->bifup) { - /* Check if there is room in the hardware to hold another outgoing packet. */ - if (e1000->tx_ring.desc[tail].desc_status) - (void)uip_poll(&e1000->uip_dev, e1000_uiptxpoll); - } - - irqrestore(flags); - return OK; -} - -/**************************************************************************** - * Function: e1000_addmac - * - * Description: - * NuttX Callback: Add the specified MAC address to the hardware multicast - * address filtering - * - * Parameters: - * dev - Reference to the NuttX driver state structure - * mac - The MAC address to be added - * - * Returned Value: - * None - * - * Assumptions: - * - ****************************************************************************/ - -#ifdef CONFIG_NET_IGMP -static int e1000_addmac(struct uip_driver_s *dev, const uint8_t *mac) -{ - struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private; - - /* Add the MAC address to the hardware multicast routing table */ - - return OK; -} -#endif - -/**************************************************************************** - * Function: e1000_rmmac - * - * Description: - * NuttX Callback: Remove the specified MAC address from the hardware multicast - * address filtering - * - * Parameters: - * dev - Reference to the NuttX driver state structure - * mac - The MAC address to be removed - * - * Returned Value: - * None - * - * Assumptions: - * - ****************************************************************************/ - -#ifdef CONFIG_NET_IGMP -static int e1000_rmmac(struct uip_driver_s *dev, const uint8_t *mac) -{ - struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private; - - /* Add the MAC address to the hardware multicast routing table */ - - return OK; -} -#endif - -static irqreturn_t e1000_interrupt_handler(int irq, void *dev_id) -{ - struct e1000_dev *e1000 = (struct e1000_dev *)dev_id; - - /* Get and clear interrupt status bits */ - int intr_cause = e1000_inl(e1000, E1000_ICR); - e1000_outl(e1000, E1000_ICR, intr_cause); - - // not for me - if (intr_cause == 0) - return IRQ_NONE; - - /* Handle interrupts according to status bit settings */ - - // Link status change - if (intr_cause & (1<<2)) { - if (e1000_inl(e1000, E1000_STATUS) & 2) - e1000->bifup = true; - else - e1000->bifup = false; - } - - /* Check if we received an incoming packet, if so, call skel_receive() */ - - // Rx-descriptor Timer expired - if (intr_cause & (1<<7)) - e1000_receive(e1000); - - // Tx queue empty - if (intr_cause & (1<<1)) - wd_cancel(e1000->txtimeout); - - /* Check is a packet transmission just completed. If so, call skel_txdone. - * This may disable further Tx interrupts if there are no pending - * tansmissions. - */ - - // Tx-descriptor Written back - if (intr_cause & (1<<0)) - uip_poll(&e1000->uip_dev, e1000_uiptxpoll); - - - // Rx-Descriptors Low - if (intr_cause & (1<<4)) { - int tail; - tail = e1000->rx_ring.tail + e1000->rx_ring.free; - tail %= CONFIG_E1000_N_RX_DESC; - e1000->rx_ring.tail = tail; - e1000->rx_ring.free = 0; - e1000_outl(e1000, E1000_RDT, tail); - } - - return IRQ_HANDLED; -} - -/******************************* PCI driver *********************************/ - -static pci_id_t e1000_id_table[] = { - {.sep = {INTEL_VENDERID, E1000_82573L}}, - {.sep = {INTEL_VENDERID, E1000_82540EM}}, - {.sep = {INTEL_VENDERID, E1000_82574L}}, - {.sep = {INTEL_VENDERID, E1000_82567LM}}, - {.sep = {INTEL_VENDERID, E1000_82541PI}}, - {.sep = {0,0}} -}; - -static int e1000_probe(uint16_t addr, pci_id_t id) -{ - uint32_t mmio_base, mmio_size; - uint32_t size; - int err; - void *kmem, *omem; - struct e1000_dev *dev; - - // alloc e1000_dev memory - if ((dev = kzalloc(sizeof(struct e1000_dev))) == NULL) - return -1; - - // save pci addr - dev->pci_addr = addr; - - // enable device - if ((err = pci_enable_device(addr, PCI_BUS_MASTER)) < 0) - goto error; - - // get e1000 device type - dev->pci_dev_id = id.join; - - // remap the controller's i/o-memory into kernel's address-space - mmio_base = pci_resource_start(addr, 0); - mmio_size = pci_resource_len(addr, 0); - err = rgmp_memmap_nocache(mmio_base, mmio_size, mmio_base); - if (err) - goto error; - dev->phy_mem_base = mmio_base; - dev->io_mem_base = mmio_base; - dev->mem_size = mmio_size; - - // MAC address - memset(dev->dst_mac, 0xFF, 6); - memcpy(dev->src_mac, (void *)(dev->io_mem_base+E1000_RA), 6); - - // IRQ setup - dev->int_desc.handler = e1000_interrupt_handler; - dev->int_desc.dev_id = dev; - if ((err = pci_request_irq(addr, &dev->int_desc, 0)) < 0) - goto err0; - - // Here we alloc a big block of memory once and make it - // aligned to page boundary and multiple of page size. This - // is because the memory can be modified by E1000 DMA and - // should be mapped no-cache which will hugely reduce memory - // access performance. The page size alloc will restrict - // this bad effect only within the memory we alloc here. - // - // NEED FIX: the memalign may alloc memory continous in - // virtual address but dis-continous in physical address - // due to RGMP memory setup. - size = CONFIG_E1000_N_TX_DESC * sizeof(struct tx_desc) + - CONFIG_E1000_N_TX_DESC * CONFIG_E1000_BUFF_SIZE + - CONFIG_E1000_N_RX_DESC * sizeof(struct rx_desc) + - CONFIG_E1000_N_RX_DESC * CONFIG_E1000_BUFF_SIZE; - size = ROUNDUP(size, PGSIZE); - omem = kmem = memalign(PGSIZE, size); - if (kmem == NULL) { - err = -ENOMEM; - goto err1; - } - rgmp_memremap_nocache((uintptr_t)kmem, size); - - // alloc memory for tx ring - dev->tx_ring.desc = (struct tx_desc*)kmem; - kmem += CONFIG_E1000_N_TX_DESC * sizeof(struct tx_desc); - dev->tx_ring.buf = kmem; - kmem += CONFIG_E1000_N_TX_DESC * CONFIG_E1000_BUFF_SIZE; - - // alloc memory for rx rings - dev->rx_ring.desc = (struct rx_desc*)kmem; - kmem += CONFIG_E1000_N_RX_DESC * sizeof(struct rx_desc); - dev->rx_ring.buf = kmem; - - /* Initialize the driver structure */ - - dev->uip_dev.d_ifup = e1000_ifup; /* I/F up (new IP address) callback */ - dev->uip_dev.d_ifdown = e1000_ifdown; /* I/F down callback */ - dev->uip_dev.d_txavail = e1000_txavail; /* New TX data callback */ -#ifdef CONFIG_NET_IGMP - dev->uip_dev.d_addmac = e1000_addmac; /* Add multicast MAC address */ - dev->uip_dev.d_rmmac = e1000_rmmac; /* Remove multicast MAC address */ -#endif - dev->uip_dev.d_private = dev; /* Used to recover private state from dev */ - - /* Create a watchdog for timing polling for and timing of transmisstions */ - - dev->txpoll = wd_create(); /* Create periodic poll timer */ - dev->txtimeout = wd_create(); /* Create TX timeout timer */ - - // Put the interface in the down state. - // e1000 reset - e1000_reset(dev); - - /* Read the MAC address from the hardware */ - memcpy(dev->uip_dev.d_mac.ether_addr_octet, (void *)(dev->io_mem_base+E1000_RA), 6); - - /* Register the device with the OS so that socket IOCTLs can be performed */ - err = netdev_register(&dev->uip_dev); - if (err) - goto err2; - - // insert into e1000_list - dev->next = e1000_list.next; - e1000_list.next = dev; - cprintf("bring up e1000 device: %04x %08x\n", addr, id.join); - - return 0; - -err2: - rgmp_memremap((uintptr_t)omem, size); - free(omem); -err1: - pci_free_irq(addr); -err0: - rgmp_memunmap(mmio_base, mmio_size); -error: - kfree(dev); - cprintf("e1000 device probe fail: %d\n", err); - return err; -} - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -void e1000_mod_init(void) -{ - pci_probe_device(e1000_id_table, e1000_probe); -} - -void e1000_mod_exit(void) -{ - uint32_t size; - struct e1000_dev *dev; - - size = CONFIG_E1000_N_TX_DESC * sizeof(struct tx_desc) + - CONFIG_E1000_N_TX_DESC * CONFIG_E1000_BUFF_SIZE + - CONFIG_E1000_N_RX_DESC * sizeof(struct rx_desc) + - CONFIG_E1000_N_RX_DESC * CONFIG_E1000_BUFF_SIZE; - size = ROUNDUP(size, PGSIZE); - - for (dev=e1000_list.next; dev!=NULL; dev=dev->next) { - netdev_unregister(&dev->uip_dev); - e1000_reset(dev); - wd_delete(dev->txpoll); - wd_delete(dev->txtimeout); - rgmp_memremap((uintptr_t)dev->tx_ring.desc, size); - free(dev->tx_ring.desc); - pci_free_irq(dev->pci_addr); - rgmp_memunmap((uintptr_t)dev->io_mem_base, dev->mem_size); - kfree(dev); - } - - e1000_list.next = NULL; -} |