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/*
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* QEMU NS SONIC DP8393x netcard
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*
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* Copyright (c) 2008-2009 Herve Poussineau
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hw.h" |
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#include "qemu-timer.h" |
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#include "net.h" |
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#include "mips.h" |
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//#define DEBUG_SONIC
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/* Calculate CRCs properly on Rx packets */
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#define SONIC_CALCULATE_RXCRC
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#if defined(SONIC_CALCULATE_RXCRC)
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/* For crc32 */
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#include <zlib.h> |
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#endif
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#ifdef DEBUG_SONIC
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#define DPRINTF(fmt, ...) \
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do { printf("sonic: " fmt , ## __VA_ARGS__); } while (0) |
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static const char* reg_names[] = { |
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"CR", "DCR", "RCR", "TCR", "IMR", "ISR", "UTDA", "CTDA", |
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"TPS", "TFC", "TSA0", "TSA1", "TFS", "URDA", "CRDA", "CRBA0", |
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"CRBA1", "RBWC0", "RBWC1", "EOBC", "URRA", "RSA", "REA", "RRP", |
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"RWP", "TRBA0", "TRBA1", "0x1b", "0x1c", "0x1d", "0x1e", "LLFA", |
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"TTDA", "CEP", "CAP2", "CAP1", "CAP0", "CE", "CDP", "CDC", |
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"SR", "WT0", "WT1", "RSC", "CRCT", "FAET", "MPT", "MDT", |
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"0x30", "0x31", "0x32", "0x33", "0x34", "0x35", "0x36", "0x37", |
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"0x38", "0x39", "0x3a", "0x3b", "0x3c", "0x3d", "0x3e", "DCR2" }; |
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#else
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#define DPRINTF(fmt, ...) do {} while (0) |
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#endif
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#define SONIC_ERROR(fmt, ...) \
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do { printf("sonic ERROR: %s: " fmt, __func__ , ## __VA_ARGS__); } while (0) |
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#define SONIC_CR 0x00 |
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#define SONIC_DCR 0x01 |
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#define SONIC_RCR 0x02 |
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#define SONIC_TCR 0x03 |
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#define SONIC_IMR 0x04 |
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#define SONIC_ISR 0x05 |
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#define SONIC_UTDA 0x06 |
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#define SONIC_CTDA 0x07 |
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#define SONIC_TPS 0x08 |
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#define SONIC_TFC 0x09 |
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#define SONIC_TSA0 0x0a |
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#define SONIC_TSA1 0x0b |
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#define SONIC_TFS 0x0c |
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#define SONIC_URDA 0x0d |
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#define SONIC_CRDA 0x0e |
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#define SONIC_CRBA0 0x0f |
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#define SONIC_CRBA1 0x10 |
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#define SONIC_RBWC0 0x11 |
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#define SONIC_RBWC1 0x12 |
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#define SONIC_EOBC 0x13 |
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#define SONIC_URRA 0x14 |
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#define SONIC_RSA 0x15 |
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#define SONIC_REA 0x16 |
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#define SONIC_RRP 0x17 |
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#define SONIC_RWP 0x18 |
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#define SONIC_TRBA0 0x19 |
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#define SONIC_TRBA1 0x1a |
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#define SONIC_LLFA 0x1f |
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#define SONIC_TTDA 0x20 |
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#define SONIC_CEP 0x21 |
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#define SONIC_CAP2 0x22 |
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#define SONIC_CAP1 0x23 |
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#define SONIC_CAP0 0x24 |
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#define SONIC_CE 0x25 |
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#define SONIC_CDP 0x26 |
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#define SONIC_CDC 0x27 |
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#define SONIC_SR 0x28 |
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#define SONIC_WT0 0x29 |
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#define SONIC_WT1 0x2a |
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#define SONIC_RSC 0x2b |
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#define SONIC_CRCT 0x2c |
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#define SONIC_FAET 0x2d |
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#define SONIC_MPT 0x2e |
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#define SONIC_MDT 0x2f |
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#define SONIC_DCR2 0x3f |
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#define SONIC_CR_HTX 0x0001 |
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#define SONIC_CR_TXP 0x0002 |
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#define SONIC_CR_RXDIS 0x0004 |
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#define SONIC_CR_RXEN 0x0008 |
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#define SONIC_CR_STP 0x0010 |
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#define SONIC_CR_ST 0x0020 |
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#define SONIC_CR_RST 0x0080 |
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#define SONIC_CR_RRRA 0x0100 |
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#define SONIC_CR_LCAM 0x0200 |
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#define SONIC_CR_MASK 0x03bf |
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#define SONIC_DCR_DW 0x0020 |
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#define SONIC_DCR_LBR 0x2000 |
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#define SONIC_DCR_EXBUS 0x8000 |
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#define SONIC_RCR_PRX 0x0001 |
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#define SONIC_RCR_LBK 0x0002 |
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#define SONIC_RCR_FAER 0x0004 |
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#define SONIC_RCR_CRCR 0x0008 |
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#define SONIC_RCR_CRS 0x0020 |
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#define SONIC_RCR_LPKT 0x0040 |
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#define SONIC_RCR_BC 0x0080 |
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#define SONIC_RCR_MC 0x0100 |
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#define SONIC_RCR_LB0 0x0200 |
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#define SONIC_RCR_LB1 0x0400 |
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#define SONIC_RCR_AMC 0x0800 |
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#define SONIC_RCR_PRO 0x1000 |
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#define SONIC_RCR_BRD 0x2000 |
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#define SONIC_RCR_RNT 0x4000 |
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#define SONIC_TCR_PTX 0x0001 |
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#define SONIC_TCR_BCM 0x0002 |
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#define SONIC_TCR_FU 0x0004 |
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#define SONIC_TCR_EXC 0x0040 |
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#define SONIC_TCR_CRSL 0x0080 |
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#define SONIC_TCR_NCRS 0x0100 |
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#define SONIC_TCR_EXD 0x0400 |
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#define SONIC_TCR_CRCI 0x2000 |
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#define SONIC_TCR_PINT 0x8000 |
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#define SONIC_ISR_RBE 0x0020 |
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#define SONIC_ISR_RDE 0x0040 |
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#define SONIC_ISR_TC 0x0080 |
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#define SONIC_ISR_TXDN 0x0200 |
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#define SONIC_ISR_PKTRX 0x0400 |
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#define SONIC_ISR_PINT 0x0800 |
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#define SONIC_ISR_LCD 0x1000 |
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typedef struct dp8393xState { |
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/* Hardware */
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int it_shift;
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qemu_irq irq; |
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#ifdef DEBUG_SONIC
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int irq_level;
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#endif
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QEMUTimer *watchdog; |
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int64_t wt_last_update; |
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VLANClientState *vc; |
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int mmio_index;
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/* Registers */
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uint8_t cam[16][6]; |
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uint16_t regs[0x40];
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/* Temporaries */
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uint8_t tx_buffer[0x10000];
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int loopback_packet;
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/* Memory access */
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void (*memory_rw)(void *opaque, target_phys_addr_t addr, uint8_t *buf, int len, int is_write); |
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void* mem_opaque;
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} dp8393xState; |
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static void dp8393x_update_irq(dp8393xState *s) |
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{ |
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int level = (s->regs[SONIC_IMR] & s->regs[SONIC_ISR]) ? 1 : 0; |
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#ifdef DEBUG_SONIC
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if (level != s->irq_level) {
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s->irq_level = level; |
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if (level) {
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DPRINTF("raise irq, isr is 0x%04x\n", s->regs[SONIC_ISR]);
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} else {
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DPRINTF("lower irq\n");
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} |
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} |
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#endif
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qemu_set_irq(s->irq, level); |
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} |
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static void do_load_cam(dp8393xState *s) |
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{ |
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uint16_t data[8];
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int width, size;
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uint16_t index = 0;
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width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1; |
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size = sizeof(uint16_t) * 4 * width; |
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while (s->regs[SONIC_CDC] & 0x1f) { |
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/* Fill current entry */
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s->memory_rw(s->mem_opaque, |
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(s->regs[SONIC_URRA] << 16) | s->regs[SONIC_CDP],
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(uint8_t *)data, size, 0);
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s->cam[index][0] = data[1 * width] & 0xff; |
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s->cam[index][1] = data[1 * width] >> 8; |
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s->cam[index][2] = data[2 * width] & 0xff; |
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s->cam[index][3] = data[2 * width] >> 8; |
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s->cam[index][4] = data[3 * width] & 0xff; |
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s->cam[index][5] = data[3 * width] >> 8; |
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DPRINTF("load cam[%d] with %02x%02x%02x%02x%02x%02x\n", index,
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s->cam[index][0], s->cam[index][1], s->cam[index][2], |
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s->cam[index][3], s->cam[index][4], s->cam[index][5]); |
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/* Move to next entry */
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s->regs[SONIC_CDC]--; |
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s->regs[SONIC_CDP] += size; |
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index++; |
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} |
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/* Read CAM enable */
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s->memory_rw(s->mem_opaque, |
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(s->regs[SONIC_URRA] << 16) | s->regs[SONIC_CDP],
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(uint8_t *)data, size, 0);
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s->regs[SONIC_CE] = data[0 * width];
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DPRINTF("load cam done. cam enable mask 0x%04x\n", s->regs[SONIC_CE]);
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/* Done */
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s->regs[SONIC_CR] &= ~SONIC_CR_LCAM; |
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s->regs[SONIC_ISR] |= SONIC_ISR_LCD; |
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dp8393x_update_irq(s); |
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} |
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static void do_read_rra(dp8393xState *s) |
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{ |
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uint16_t data[8];
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int width, size;
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/* Read memory */
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width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1; |
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size = sizeof(uint16_t) * 4 * width; |
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s->memory_rw(s->mem_opaque, |
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(s->regs[SONIC_URRA] << 16) | s->regs[SONIC_RRP],
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(uint8_t *)data, size, 0);
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/* Update SONIC registers */
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s->regs[SONIC_CRBA0] = data[0 * width];
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s->regs[SONIC_CRBA1] = data[1 * width];
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s->regs[SONIC_RBWC0] = data[2 * width];
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s->regs[SONIC_RBWC1] = data[3 * width];
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DPRINTF("CRBA0/1: 0x%04x/0x%04x, RBWC0/1: 0x%04x/0x%04x\n",
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s->regs[SONIC_CRBA0], s->regs[SONIC_CRBA1], |
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s->regs[SONIC_RBWC0], s->regs[SONIC_RBWC1]); |
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/* Go to next entry */
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s->regs[SONIC_RRP] += size; |
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/* Handle wrap */
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if (s->regs[SONIC_RRP] == s->regs[SONIC_REA]) {
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s->regs[SONIC_RRP] = s->regs[SONIC_RSA]; |
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} |
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|
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/* Check resource exhaustion */
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if (s->regs[SONIC_RRP] == s->regs[SONIC_RWP])
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{ |
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s->regs[SONIC_ISR] |= SONIC_ISR_RBE; |
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dp8393x_update_irq(s); |
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} |
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|
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/* Done */
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s->regs[SONIC_CR] &= ~SONIC_CR_RRRA; |
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} |
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static void do_software_reset(dp8393xState *s) |
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{ |
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qemu_del_timer(s->watchdog); |
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s->regs[SONIC_CR] &= ~(SONIC_CR_LCAM | SONIC_CR_RRRA | SONIC_CR_TXP | SONIC_CR_HTX); |
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s->regs[SONIC_CR] |= SONIC_CR_RST | SONIC_CR_RXDIS; |
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} |
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|
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static void set_next_tick(dp8393xState *s) |
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{ |
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uint32_t ticks; |
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int64_t delay; |
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if (s->regs[SONIC_CR] & SONIC_CR_STP) {
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qemu_del_timer(s->watchdog); |
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return;
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} |
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ticks = s->regs[SONIC_WT1] << 16 | s->regs[SONIC_WT0];
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s->wt_last_update = qemu_get_clock(vm_clock); |
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delay = ticks_per_sec * ticks / 5000000;
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qemu_mod_timer(s->watchdog, s->wt_last_update + delay); |
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} |
296 |
|
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static void update_wt_regs(dp8393xState *s) |
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{ |
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int64_t elapsed; |
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uint32_t val; |
301 |
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if (s->regs[SONIC_CR] & SONIC_CR_STP) {
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qemu_del_timer(s->watchdog); |
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return;
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} |
306 |
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elapsed = s->wt_last_update - qemu_get_clock(vm_clock); |
308 |
val = s->regs[SONIC_WT1] << 16 | s->regs[SONIC_WT0];
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val -= elapsed / 5000000;
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s->regs[SONIC_WT1] = (val >> 16) & 0xffff; |
311 |
s->regs[SONIC_WT0] = (val >> 0) & 0xffff; |
312 |
set_next_tick(s); |
313 |
|
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} |
315 |
|
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static void do_start_timer(dp8393xState *s) |
317 |
{ |
318 |
s->regs[SONIC_CR] &= ~SONIC_CR_STP; |
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set_next_tick(s); |
320 |
} |
321 |
|
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static void do_stop_timer(dp8393xState *s) |
323 |
{ |
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s->regs[SONIC_CR] &= ~SONIC_CR_ST; |
325 |
update_wt_regs(s); |
326 |
} |
327 |
|
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static void do_receiver_enable(dp8393xState *s) |
329 |
{ |
330 |
s->regs[SONIC_CR] &= ~SONIC_CR_RXDIS; |
331 |
} |
332 |
|
333 |
static void do_receiver_disable(dp8393xState *s) |
334 |
{ |
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s->regs[SONIC_CR] &= ~SONIC_CR_RXEN; |
336 |
} |
337 |
|
338 |
static void do_transmit_packets(dp8393xState *s) |
339 |
{ |
340 |
uint16_t data[12];
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int width, size;
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int tx_len, len;
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uint16_t i; |
344 |
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width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1; |
346 |
|
347 |
while (1) { |
348 |
/* Read memory */
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DPRINTF("Transmit packet at %08x\n",
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(s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_CTDA]);
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size = sizeof(uint16_t) * 6 * width; |
352 |
s->regs[SONIC_TTDA] = s->regs[SONIC_CTDA]; |
353 |
s->memory_rw(s->mem_opaque, |
354 |
((s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA]) + sizeof(uint16_t) * width, |
355 |
(uint8_t *)data, size, 0);
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tx_len = 0;
|
357 |
|
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/* Update registers */
|
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s->regs[SONIC_TCR] = data[0 * width] & 0xf000; |
360 |
s->regs[SONIC_TPS] = data[1 * width];
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s->regs[SONIC_TFC] = data[2 * width];
|
362 |
s->regs[SONIC_TSA0] = data[3 * width];
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s->regs[SONIC_TSA1] = data[4 * width];
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s->regs[SONIC_TFS] = data[5 * width];
|
365 |
|
366 |
/* Handle programmable interrupt */
|
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if (s->regs[SONIC_TCR] & SONIC_TCR_PINT) {
|
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s->regs[SONIC_ISR] |= SONIC_ISR_PINT; |
369 |
} else {
|
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s->regs[SONIC_ISR] &= ~SONIC_ISR_PINT; |
371 |
} |
372 |
|
373 |
for (i = 0; i < s->regs[SONIC_TFC]; ) { |
374 |
/* Append fragment */
|
375 |
len = s->regs[SONIC_TFS]; |
376 |
if (tx_len + len > sizeof(s->tx_buffer)) { |
377 |
len = sizeof(s->tx_buffer) - tx_len;
|
378 |
} |
379 |
s->memory_rw(s->mem_opaque, |
380 |
(s->regs[SONIC_TSA1] << 16) | s->regs[SONIC_TSA0],
|
381 |
&s->tx_buffer[tx_len], len, 0);
|
382 |
tx_len += len; |
383 |
|
384 |
i++; |
385 |
if (i != s->regs[SONIC_TFC]) {
|
386 |
/* Read next fragment details */
|
387 |
size = sizeof(uint16_t) * 3 * width; |
388 |
s->memory_rw(s->mem_opaque, |
389 |
((s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA]) + sizeof(uint16_t) * (4 + 3 * i) * width, |
390 |
(uint8_t *)data, size, 0);
|
391 |
s->regs[SONIC_TSA0] = data[0 * width];
|
392 |
s->regs[SONIC_TSA1] = data[1 * width];
|
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s->regs[SONIC_TFS] = data[2 * width];
|
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} |
395 |
} |
396 |
|
397 |
/* Handle Ethernet checksum */
|
398 |
if (!(s->regs[SONIC_TCR] & SONIC_TCR_CRCI)) {
|
399 |
/* Don't append FCS there, to look like slirp packets
|
400 |
* which don't have one */
|
401 |
} else {
|
402 |
/* Remove existing FCS */
|
403 |
tx_len -= 4;
|
404 |
} |
405 |
|
406 |
if (s->regs[SONIC_RCR] & (SONIC_RCR_LB1 | SONIC_RCR_LB0)) {
|
407 |
/* Loopback */
|
408 |
s->regs[SONIC_TCR] |= SONIC_TCR_CRSL; |
409 |
if (s->vc->can_receive(s->vc)) {
|
410 |
s->loopback_packet = 1;
|
411 |
s->vc->receive(s->vc, s->tx_buffer, tx_len); |
412 |
} |
413 |
} else {
|
414 |
/* Transmit packet */
|
415 |
qemu_send_packet(s->vc, s->tx_buffer, tx_len); |
416 |
} |
417 |
s->regs[SONIC_TCR] |= SONIC_TCR_PTX; |
418 |
|
419 |
/* Write status */
|
420 |
data[0 * width] = s->regs[SONIC_TCR] & 0x0fff; /* status */ |
421 |
size = sizeof(uint16_t) * width;
|
422 |
s->memory_rw(s->mem_opaque, |
423 |
(s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA],
|
424 |
(uint8_t *)data, size, 1);
|
425 |
|
426 |
if (!(s->regs[SONIC_CR] & SONIC_CR_HTX)) {
|
427 |
/* Read footer of packet */
|
428 |
size = sizeof(uint16_t) * width;
|
429 |
s->memory_rw(s->mem_opaque, |
430 |
((s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA]) + sizeof(uint16_t) * (4 + 3 * s->regs[SONIC_TFC]) * width, |
431 |
(uint8_t *)data, size, 0);
|
432 |
s->regs[SONIC_CTDA] = data[0 * width] & ~0x1; |
433 |
if (data[0 * width] & 0x1) { |
434 |
/* EOL detected */
|
435 |
break;
|
436 |
} |
437 |
} |
438 |
} |
439 |
|
440 |
/* Done */
|
441 |
s->regs[SONIC_CR] &= ~SONIC_CR_TXP; |
442 |
s->regs[SONIC_ISR] |= SONIC_ISR_TXDN; |
443 |
dp8393x_update_irq(s); |
444 |
} |
445 |
|
446 |
static void do_halt_transmission(dp8393xState *s) |
447 |
{ |
448 |
/* Nothing to do */
|
449 |
} |
450 |
|
451 |
static void do_command(dp8393xState *s, uint16_t command) |
452 |
{ |
453 |
if ((s->regs[SONIC_CR] & SONIC_CR_RST) && !(command & SONIC_CR_RST)) {
|
454 |
s->regs[SONIC_CR] &= ~SONIC_CR_RST; |
455 |
return;
|
456 |
} |
457 |
|
458 |
s->regs[SONIC_CR] |= (command & SONIC_CR_MASK); |
459 |
|
460 |
if (command & SONIC_CR_HTX)
|
461 |
do_halt_transmission(s); |
462 |
if (command & SONIC_CR_TXP)
|
463 |
do_transmit_packets(s); |
464 |
if (command & SONIC_CR_RXDIS)
|
465 |
do_receiver_disable(s); |
466 |
if (command & SONIC_CR_RXEN)
|
467 |
do_receiver_enable(s); |
468 |
if (command & SONIC_CR_STP)
|
469 |
do_stop_timer(s); |
470 |
if (command & SONIC_CR_ST)
|
471 |
do_start_timer(s); |
472 |
if (command & SONIC_CR_RST)
|
473 |
do_software_reset(s); |
474 |
if (command & SONIC_CR_RRRA)
|
475 |
do_read_rra(s); |
476 |
if (command & SONIC_CR_LCAM)
|
477 |
do_load_cam(s); |
478 |
} |
479 |
|
480 |
static uint16_t read_register(dp8393xState *s, int reg) |
481 |
{ |
482 |
uint16_t val = 0;
|
483 |
|
484 |
switch (reg) {
|
485 |
/* Update data before reading it */
|
486 |
case SONIC_WT0:
|
487 |
case SONIC_WT1:
|
488 |
update_wt_regs(s); |
489 |
val = s->regs[reg]; |
490 |
break;
|
491 |
/* Accept read to some registers only when in reset mode */
|
492 |
case SONIC_CAP2:
|
493 |
case SONIC_CAP1:
|
494 |
case SONIC_CAP0:
|
495 |
if (s->regs[SONIC_CR] & SONIC_CR_RST) {
|
496 |
val = s->cam[s->regs[SONIC_CEP] & 0xf][2* (SONIC_CAP0 - reg) + 1] << 8; |
497 |
val |= s->cam[s->regs[SONIC_CEP] & 0xf][2* (SONIC_CAP0 - reg)]; |
498 |
} |
499 |
break;
|
500 |
/* All other registers have no special contrainst */
|
501 |
default:
|
502 |
val = s->regs[reg]; |
503 |
} |
504 |
|
505 |
DPRINTF("read 0x%04x from reg %s\n", val, reg_names[reg]);
|
506 |
|
507 |
return val;
|
508 |
} |
509 |
|
510 |
static void write_register(dp8393xState *s, int reg, uint16_t val) |
511 |
{ |
512 |
DPRINTF("write 0x%04x to reg %s\n", val, reg_names[reg]);
|
513 |
|
514 |
switch (reg) {
|
515 |
/* Command register */
|
516 |
case SONIC_CR:
|
517 |
do_command(s, val);; |
518 |
break;
|
519 |
/* Prevent write to read-only registers */
|
520 |
case SONIC_CAP2:
|
521 |
case SONIC_CAP1:
|
522 |
case SONIC_CAP0:
|
523 |
case SONIC_SR:
|
524 |
case SONIC_MDT:
|
525 |
DPRINTF("writing to reg %d invalid\n", reg);
|
526 |
break;
|
527 |
/* Accept write to some registers only when in reset mode */
|
528 |
case SONIC_DCR:
|
529 |
if (s->regs[SONIC_CR] & SONIC_CR_RST) {
|
530 |
s->regs[reg] = val & 0xbfff;
|
531 |
} else {
|
532 |
DPRINTF("writing to DCR invalid\n");
|
533 |
} |
534 |
break;
|
535 |
case SONIC_DCR2:
|
536 |
if (s->regs[SONIC_CR] & SONIC_CR_RST) {
|
537 |
s->regs[reg] = val & 0xf017;
|
538 |
} else {
|
539 |
DPRINTF("writing to DCR2 invalid\n");
|
540 |
} |
541 |
break;
|
542 |
/* 12 lower bytes are Read Only */
|
543 |
case SONIC_TCR:
|
544 |
s->regs[reg] = val & 0xf000;
|
545 |
break;
|
546 |
/* 9 lower bytes are Read Only */
|
547 |
case SONIC_RCR:
|
548 |
s->regs[reg] = val & 0xffe0;
|
549 |
break;
|
550 |
/* Ignore most significant bit */
|
551 |
case SONIC_IMR:
|
552 |
s->regs[reg] = val & 0x7fff;
|
553 |
dp8393x_update_irq(s); |
554 |
break;
|
555 |
/* Clear bits by writing 1 to them */
|
556 |
case SONIC_ISR:
|
557 |
val &= s->regs[reg]; |
558 |
s->regs[reg] &= ~val; |
559 |
if (val & SONIC_ISR_RBE) {
|
560 |
do_read_rra(s); |
561 |
} |
562 |
dp8393x_update_irq(s); |
563 |
break;
|
564 |
/* Ignore least significant bit */
|
565 |
case SONIC_RSA:
|
566 |
case SONIC_REA:
|
567 |
case SONIC_RRP:
|
568 |
case SONIC_RWP:
|
569 |
s->regs[reg] = val & 0xfffe;
|
570 |
break;
|
571 |
/* Invert written value for some registers */
|
572 |
case SONIC_CRCT:
|
573 |
case SONIC_FAET:
|
574 |
case SONIC_MPT:
|
575 |
s->regs[reg] = val ^ 0xffff;
|
576 |
break;
|
577 |
/* All other registers have no special contrainst */
|
578 |
default:
|
579 |
s->regs[reg] = val; |
580 |
} |
581 |
|
582 |
if (reg == SONIC_WT0 || reg == SONIC_WT1) {
|
583 |
set_next_tick(s); |
584 |
} |
585 |
} |
586 |
|
587 |
static void dp8393x_watchdog(void *opaque) |
588 |
{ |
589 |
dp8393xState *s = opaque; |
590 |
|
591 |
if (s->regs[SONIC_CR] & SONIC_CR_STP) {
|
592 |
return;
|
593 |
} |
594 |
|
595 |
s->regs[SONIC_WT1] = 0xffff;
|
596 |
s->regs[SONIC_WT0] = 0xffff;
|
597 |
set_next_tick(s); |
598 |
|
599 |
/* Signal underflow */
|
600 |
s->regs[SONIC_ISR] |= SONIC_ISR_TC; |
601 |
dp8393x_update_irq(s); |
602 |
} |
603 |
|
604 |
static uint32_t dp8393x_readw(void *opaque, target_phys_addr_t addr) |
605 |
{ |
606 |
dp8393xState *s = opaque; |
607 |
int reg;
|
608 |
|
609 |
if ((addr & ((1 << s->it_shift) - 1)) != 0) { |
610 |
return 0; |
611 |
} |
612 |
|
613 |
reg = addr >> s->it_shift; |
614 |
return read_register(s, reg);
|
615 |
} |
616 |
|
617 |
static uint32_t dp8393x_readb(void *opaque, target_phys_addr_t addr) |
618 |
{ |
619 |
uint16_t v = dp8393x_readw(opaque, addr & ~0x1);
|
620 |
return (v >> (8 * (addr & 0x1))) & 0xff; |
621 |
} |
622 |
|
623 |
static uint32_t dp8393x_readl(void *opaque, target_phys_addr_t addr) |
624 |
{ |
625 |
uint32_t v; |
626 |
v = dp8393x_readw(opaque, addr); |
627 |
v |= dp8393x_readw(opaque, addr + 2) << 16; |
628 |
return v;
|
629 |
} |
630 |
|
631 |
static void dp8393x_writew(void *opaque, target_phys_addr_t addr, uint32_t val) |
632 |
{ |
633 |
dp8393xState *s = opaque; |
634 |
int reg;
|
635 |
|
636 |
if ((addr & ((1 << s->it_shift) - 1)) != 0) { |
637 |
return;
|
638 |
} |
639 |
|
640 |
reg = addr >> s->it_shift; |
641 |
|
642 |
write_register(s, reg, (uint16_t)val); |
643 |
} |
644 |
|
645 |
static void dp8393x_writeb(void *opaque, target_phys_addr_t addr, uint32_t val) |
646 |
{ |
647 |
uint16_t old_val = dp8393x_readw(opaque, addr & ~0x1);
|
648 |
|
649 |
switch (addr & 3) { |
650 |
case 0: |
651 |
val = val | (old_val & 0xff00);
|
652 |
break;
|
653 |
case 1: |
654 |
val = (val << 8) | (old_val & 0x00ff); |
655 |
break;
|
656 |
} |
657 |
dp8393x_writew(opaque, addr & ~0x1, val);
|
658 |
} |
659 |
|
660 |
static void dp8393x_writel(void *opaque, target_phys_addr_t addr, uint32_t val) |
661 |
{ |
662 |
dp8393x_writew(opaque, addr, val & 0xffff);
|
663 |
dp8393x_writew(opaque, addr + 2, (val >> 16) & 0xffff); |
664 |
} |
665 |
|
666 |
static CPUReadMemoryFunc *dp8393x_read[3] = { |
667 |
dp8393x_readb, |
668 |
dp8393x_readw, |
669 |
dp8393x_readl, |
670 |
}; |
671 |
|
672 |
static CPUWriteMemoryFunc *dp8393x_write[3] = { |
673 |
dp8393x_writeb, |
674 |
dp8393x_writew, |
675 |
dp8393x_writel, |
676 |
}; |
677 |
|
678 |
static int nic_can_receive(VLANClientState *vc) |
679 |
{ |
680 |
dp8393xState *s = vc->opaque; |
681 |
|
682 |
if (!(s->regs[SONIC_CR] & SONIC_CR_RXEN))
|
683 |
return 0; |
684 |
if (s->regs[SONIC_ISR] & SONIC_ISR_RBE)
|
685 |
return 0; |
686 |
return 1; |
687 |
} |
688 |
|
689 |
static int receive_filter(dp8393xState *s, const uint8_t * buf, int size) |
690 |
{ |
691 |
static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
692 |
int i;
|
693 |
|
694 |
/* Check for runt packet (remember that checksum is not there) */
|
695 |
if (size < 64 - 4) { |
696 |
return (s->regs[SONIC_RCR] & SONIC_RCR_RNT) ? 0 : -1; |
697 |
} |
698 |
|
699 |
/* Check promiscuous mode */
|
700 |
if ((s->regs[SONIC_RCR] & SONIC_RCR_PRO) && (buf[0] & 1) == 0) { |
701 |
return 0; |
702 |
} |
703 |
|
704 |
/* Check multicast packets */
|
705 |
if ((s->regs[SONIC_RCR] & SONIC_RCR_AMC) && (buf[0] & 1) == 1) { |
706 |
return SONIC_RCR_MC;
|
707 |
} |
708 |
|
709 |
/* Check broadcast */
|
710 |
if ((s->regs[SONIC_RCR] & SONIC_RCR_BRD) && !memcmp(buf, bcast, sizeof(bcast))) { |
711 |
return SONIC_RCR_BC;
|
712 |
} |
713 |
|
714 |
/* Check CAM */
|
715 |
for (i = 0; i < 16; i++) { |
716 |
if (s->regs[SONIC_CE] & (1 << i)) { |
717 |
/* Entry enabled */
|
718 |
if (!memcmp(buf, s->cam[i], sizeof(s->cam[i]))) { |
719 |
return 0; |
720 |
} |
721 |
} |
722 |
} |
723 |
|
724 |
return -1; |
725 |
} |
726 |
|
727 |
static ssize_t nic_receive(VLANClientState *vc, const uint8_t * buf, size_t size) |
728 |
{ |
729 |
uint16_t data[10];
|
730 |
dp8393xState *s = vc->opaque; |
731 |
int packet_type;
|
732 |
uint32_t available, address; |
733 |
int width, rx_len = size;
|
734 |
uint32_t checksum; |
735 |
|
736 |
width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1; |
737 |
|
738 |
s->regs[SONIC_RCR] &= ~(SONIC_RCR_PRX | SONIC_RCR_LBK | SONIC_RCR_FAER | |
739 |
SONIC_RCR_CRCR | SONIC_RCR_LPKT | SONIC_RCR_BC | SONIC_RCR_MC); |
740 |
|
741 |
packet_type = receive_filter(s, buf, size); |
742 |
if (packet_type < 0) { |
743 |
DPRINTF("packet not for netcard\n");
|
744 |
return -1; |
745 |
} |
746 |
|
747 |
/* XXX: Check byte ordering */
|
748 |
|
749 |
/* Check for EOL */
|
750 |
if (s->regs[SONIC_LLFA] & 0x1) { |
751 |
/* Are we still in resource exhaustion? */
|
752 |
size = sizeof(uint16_t) * 1 * width; |
753 |
address = ((s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]) + sizeof(uint16_t) * 5 * width; |
754 |
s->memory_rw(s->mem_opaque, address, (uint8_t*)data, size, 0);
|
755 |
if (data[0 * width] & 0x1) { |
756 |
/* Still EOL ; stop reception */
|
757 |
return -1; |
758 |
} else {
|
759 |
s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA]; |
760 |
} |
761 |
} |
762 |
|
763 |
/* Save current position */
|
764 |
s->regs[SONIC_TRBA1] = s->regs[SONIC_CRBA1]; |
765 |
s->regs[SONIC_TRBA0] = s->regs[SONIC_CRBA0]; |
766 |
|
767 |
/* Calculate the ethernet checksum */
|
768 |
#ifdef SONIC_CALCULATE_RXCRC
|
769 |
checksum = cpu_to_le32(crc32(0, buf, rx_len));
|
770 |
#else
|
771 |
checksum = 0;
|
772 |
#endif
|
773 |
|
774 |
/* Put packet into RBA */
|
775 |
DPRINTF("Receive packet at %08x\n", (s->regs[SONIC_CRBA1] << 16) | s->regs[SONIC_CRBA0]); |
776 |
address = (s->regs[SONIC_CRBA1] << 16) | s->regs[SONIC_CRBA0];
|
777 |
s->memory_rw(s->mem_opaque, address, (uint8_t*)buf, rx_len, 1);
|
778 |
address += rx_len; |
779 |
s->memory_rw(s->mem_opaque, address, (uint8_t*)&checksum, 4, 1); |
780 |
rx_len += 4;
|
781 |
s->regs[SONIC_CRBA1] = address >> 16;
|
782 |
s->regs[SONIC_CRBA0] = address & 0xffff;
|
783 |
available = (s->regs[SONIC_RBWC1] << 16) | s->regs[SONIC_RBWC0];
|
784 |
available -= rx_len / 2;
|
785 |
s->regs[SONIC_RBWC1] = available >> 16;
|
786 |
s->regs[SONIC_RBWC0] = available & 0xffff;
|
787 |
|
788 |
/* Update status */
|
789 |
if (((s->regs[SONIC_RBWC1] << 16) | s->regs[SONIC_RBWC0]) < s->regs[SONIC_EOBC]) { |
790 |
s->regs[SONIC_RCR] |= SONIC_RCR_LPKT; |
791 |
} |
792 |
s->regs[SONIC_RCR] |= packet_type; |
793 |
s->regs[SONIC_RCR] |= SONIC_RCR_PRX; |
794 |
if (s->loopback_packet) {
|
795 |
s->regs[SONIC_RCR] |= SONIC_RCR_LBK; |
796 |
s->loopback_packet = 0;
|
797 |
} |
798 |
|
799 |
/* Write status to memory */
|
800 |
DPRINTF("Write status at %08x\n", (s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]); |
801 |
data[0 * width] = s->regs[SONIC_RCR]; /* status */ |
802 |
data[1 * width] = rx_len; /* byte count */ |
803 |
data[2 * width] = s->regs[SONIC_TRBA0]; /* pkt_ptr0 */ |
804 |
data[3 * width] = s->regs[SONIC_TRBA1]; /* pkt_ptr1 */ |
805 |
data[4 * width] = s->regs[SONIC_RSC]; /* seq_no */ |
806 |
size = sizeof(uint16_t) * 5 * width; |
807 |
s->memory_rw(s->mem_opaque, (s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA], (uint8_t *)data, size, 1); |
808 |
|
809 |
/* Move to next descriptor */
|
810 |
size = sizeof(uint16_t) * width;
|
811 |
s->memory_rw(s->mem_opaque, |
812 |
((s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]) + sizeof(uint16_t) * 5 * width, |
813 |
(uint8_t *)data, size, 0);
|
814 |
s->regs[SONIC_LLFA] = data[0 * width];
|
815 |
if (s->regs[SONIC_LLFA] & 0x1) { |
816 |
/* EOL detected */
|
817 |
s->regs[SONIC_ISR] |= SONIC_ISR_RDE; |
818 |
} else {
|
819 |
data[0 * width] = 0; /* in_use */ |
820 |
s->memory_rw(s->mem_opaque, |
821 |
((s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]) + sizeof(uint16_t) * 6 * width, |
822 |
(uint8_t *)data, size, 1);
|
823 |
s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA]; |
824 |
s->regs[SONIC_ISR] |= SONIC_ISR_PKTRX; |
825 |
s->regs[SONIC_RSC] = (s->regs[SONIC_RSC] & 0xff00) | (((s->regs[SONIC_RSC] & 0x00ff) + 1) & 0x00ff); |
826 |
|
827 |
if (s->regs[SONIC_RCR] & SONIC_RCR_LPKT) {
|
828 |
/* Read next RRA */
|
829 |
do_read_rra(s); |
830 |
} |
831 |
} |
832 |
|
833 |
/* Done */
|
834 |
dp8393x_update_irq(s); |
835 |
|
836 |
return size;
|
837 |
} |
838 |
|
839 |
static void nic_reset(void *opaque) |
840 |
{ |
841 |
dp8393xState *s = opaque; |
842 |
qemu_del_timer(s->watchdog); |
843 |
|
844 |
s->regs[SONIC_CR] = SONIC_CR_RST | SONIC_CR_STP | SONIC_CR_RXDIS; |
845 |
s->regs[SONIC_DCR] &= ~(SONIC_DCR_EXBUS | SONIC_DCR_LBR); |
846 |
s->regs[SONIC_RCR] &= ~(SONIC_RCR_LB0 | SONIC_RCR_LB1 | SONIC_RCR_BRD | SONIC_RCR_RNT); |
847 |
s->regs[SONIC_TCR] |= SONIC_TCR_NCRS | SONIC_TCR_PTX; |
848 |
s->regs[SONIC_TCR] &= ~SONIC_TCR_BCM; |
849 |
s->regs[SONIC_IMR] = 0;
|
850 |
s->regs[SONIC_ISR] = 0;
|
851 |
s->regs[SONIC_DCR2] = 0;
|
852 |
s->regs[SONIC_EOBC] = 0x02F8;
|
853 |
s->regs[SONIC_RSC] = 0;
|
854 |
s->regs[SONIC_CE] = 0;
|
855 |
s->regs[SONIC_RSC] = 0;
|
856 |
|
857 |
/* Network cable is connected */
|
858 |
s->regs[SONIC_RCR] |= SONIC_RCR_CRS; |
859 |
|
860 |
dp8393x_update_irq(s); |
861 |
} |
862 |
|
863 |
static void nic_cleanup(VLANClientState *vc) |
864 |
{ |
865 |
dp8393xState *s = vc->opaque; |
866 |
|
867 |
cpu_unregister_io_memory(s->mmio_index); |
868 |
|
869 |
qemu_del_timer(s->watchdog); |
870 |
qemu_free_timer(s->watchdog); |
871 |
|
872 |
qemu_free(s); |
873 |
} |
874 |
|
875 |
void dp83932_init(NICInfo *nd, target_phys_addr_t base, int it_shift, |
876 |
qemu_irq irq, void* mem_opaque,
|
877 |
void (*memory_rw)(void *opaque, target_phys_addr_t addr, uint8_t *buf, int len, int is_write)) |
878 |
{ |
879 |
dp8393xState *s; |
880 |
|
881 |
qemu_check_nic_model(nd, "dp83932");
|
882 |
|
883 |
s = qemu_mallocz(sizeof(dp8393xState));
|
884 |
|
885 |
s->mem_opaque = mem_opaque; |
886 |
s->memory_rw = memory_rw; |
887 |
s->it_shift = it_shift; |
888 |
s->irq = irq; |
889 |
s->watchdog = qemu_new_timer(vm_clock, dp8393x_watchdog, s); |
890 |
s->regs[SONIC_SR] = 0x0004; /* only revision recognized by Linux */ |
891 |
|
892 |
s->vc = nd->vc = qemu_new_vlan_client(nd->vlan, nd->model, nd->name, |
893 |
nic_can_receive, nic_receive, NULL,
|
894 |
nic_cleanup, s); |
895 |
|
896 |
qemu_format_nic_info_str(s->vc, nd->macaddr); |
897 |
qemu_register_reset(nic_reset, s); |
898 |
nic_reset(s); |
899 |
|
900 |
s->mmio_index = cpu_register_io_memory(dp8393x_read, dp8393x_write, s); |
901 |
cpu_register_physical_memory(base, 0x40 << it_shift, s->mmio_index);
|
902 |
} |