997 lines
28 KiB
C
997 lines
28 KiB
C
/*
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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 "qemu/osdep.h"
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#include "hw/irq.h"
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#include "hw/qdev-properties.h"
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#include "hw/sysbus.h"
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#include "migration/vmstate.h"
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#include "net/net.h"
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#include "qapi/error.h"
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#include "qemu/module.h"
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#include "qemu/timer.h"
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#include <zlib.h>
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#include "qom/object.h"
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#include "trace.h"
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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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#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_REG_COUNT 0x40
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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_RBAE 0x0010
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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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#define SONIC_DESC_EOL 0x0001
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#define SONIC_DESC_ADDR 0xFFFE
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#define TYPE_DP8393X "dp8393x"
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OBJECT_DECLARE_SIMPLE_TYPE(dp8393xState, DP8393X)
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struct dp8393xState {
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SysBusDevice parent_obj;
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/* Hardware */
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uint8_t it_shift;
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bool big_endian;
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bool last_rba_is_full;
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qemu_irq irq;
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int irq_level;
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QEMUTimer *watchdog;
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int64_t wt_last_update;
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NICConf conf;
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NICState *nic;
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MemoryRegion mmio;
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/* Registers */
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uint16_t cam[16][3];
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uint16_t regs[SONIC_REG_COUNT];
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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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MemoryRegion *dma_mr;
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AddressSpace as;
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};
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/*
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* Accessor functions for values which are formed by
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* concatenating two 16 bit device registers. By putting these
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* in their own functions with a uint32_t return type we avoid the
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* pitfall of implicit sign extension where ((x << 16) | y) is a
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* signed 32 bit integer that might get sign-extended to a 64 bit integer.
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*/
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static uint32_t dp8393x_cdp(dp8393xState *s)
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{
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return (s->regs[SONIC_URRA] << 16) | s->regs[SONIC_CDP];
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}
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static uint32_t dp8393x_crba(dp8393xState *s)
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{
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return (s->regs[SONIC_CRBA1] << 16) | s->regs[SONIC_CRBA0];
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}
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static uint32_t dp8393x_crda(dp8393xState *s)
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{
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return (s->regs[SONIC_URDA] << 16) |
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(s->regs[SONIC_CRDA] & SONIC_DESC_ADDR);
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}
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static uint32_t dp8393x_rbwc(dp8393xState *s)
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{
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return (s->regs[SONIC_RBWC1] << 16) | s->regs[SONIC_RBWC0];
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}
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static uint32_t dp8393x_rrp(dp8393xState *s)
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{
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return (s->regs[SONIC_URRA] << 16) | s->regs[SONIC_RRP];
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}
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static uint32_t dp8393x_tsa(dp8393xState *s)
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{
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return (s->regs[SONIC_TSA1] << 16) | s->regs[SONIC_TSA0];
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}
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static uint32_t dp8393x_ttda(dp8393xState *s)
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{
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return (s->regs[SONIC_UTDA] << 16) |
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(s->regs[SONIC_TTDA] & SONIC_DESC_ADDR);
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}
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static uint32_t dp8393x_wt(dp8393xState *s)
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{
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return s->regs[SONIC_WT1] << 16 | s->regs[SONIC_WT0];
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}
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static uint16_t dp8393x_get(dp8393xState *s, hwaddr addr, int offset)
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{
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const MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED;
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uint16_t val;
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if (s->regs[SONIC_DCR] & SONIC_DCR_DW) {
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addr += offset << 2;
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if (s->big_endian) {
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val = address_space_ldl_be(&s->as, addr, attrs, NULL);
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} else {
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val = address_space_ldl_le(&s->as, addr, attrs, NULL);
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}
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} else {
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addr += offset << 1;
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if (s->big_endian) {
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val = address_space_lduw_be(&s->as, addr, attrs, NULL);
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} else {
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val = address_space_lduw_le(&s->as, addr, attrs, NULL);
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}
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}
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return val;
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}
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static void dp8393x_put(dp8393xState *s,
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hwaddr addr, int offset, uint16_t val)
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{
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const MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED;
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if (s->regs[SONIC_DCR] & SONIC_DCR_DW) {
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addr += offset << 2;
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if (s->big_endian) {
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address_space_stl_be(&s->as, addr, val, attrs, NULL);
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} else {
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address_space_stl_le(&s->as, addr, val, attrs, NULL);
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}
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} else {
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addr += offset << 1;
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if (s->big_endian) {
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address_space_stw_be(&s->as, addr, val, attrs, NULL);
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} else {
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address_space_stw_le(&s->as, addr, val, attrs, NULL);
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}
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}
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}
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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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if (level != s->irq_level) {
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s->irq_level = level;
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if (level) {
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trace_dp8393x_raise_irq(s->regs[SONIC_ISR]);
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} else {
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trace_dp8393x_lower_irq();
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}
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}
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qemu_set_irq(s->irq, level);
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}
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static void dp8393x_do_load_cam(dp8393xState *s)
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{
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int width, size;
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uint16_t index;
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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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index = dp8393x_get(s, dp8393x_cdp(s), 0) & 0xf;
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s->cam[index][0] = dp8393x_get(s, dp8393x_cdp(s), 1);
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s->cam[index][1] = dp8393x_get(s, dp8393x_cdp(s), 2);
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s->cam[index][2] = dp8393x_get(s, dp8393x_cdp(s), 3);
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trace_dp8393x_load_cam(index,
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s->cam[index][0] >> 8, s->cam[index][0] & 0xff,
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s->cam[index][1] >> 8, s->cam[index][1] & 0xff,
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s->cam[index][2] >> 8, s->cam[index][2] & 0xff);
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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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}
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/* Read CAM enable */
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s->regs[SONIC_CE] = dp8393x_get(s, dp8393x_cdp(s), 0);
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trace_dp8393x_load_cam_done(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 dp8393x_do_read_rra(dp8393xState *s)
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{
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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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/* Update SONIC registers */
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s->regs[SONIC_CRBA0] = dp8393x_get(s, dp8393x_rrp(s), 0);
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s->regs[SONIC_CRBA1] = dp8393x_get(s, dp8393x_rrp(s), 1);
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s->regs[SONIC_RBWC0] = dp8393x_get(s, dp8393x_rrp(s), 2);
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s->regs[SONIC_RBWC1] = dp8393x_get(s, dp8393x_rrp(s), 3);
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trace_dp8393x_read_rra_regs(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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/* Warn the host if CRBA now has the last available resource */
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if (s->regs[SONIC_RRP] == s->regs[SONIC_RWP]) {
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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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/* Allow packet reception */
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s->last_rba_is_full = false;
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}
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static void dp8393x_do_software_reset(dp8393xState *s)
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{
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timer_del(s->watchdog);
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s->regs[SONIC_CR] &= ~(SONIC_CR_LCAM | SONIC_CR_RRRA | SONIC_CR_TXP |
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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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static void dp8393x_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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timer_del(s->watchdog);
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return;
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}
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ticks = dp8393x_wt(s);
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s->wt_last_update = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
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delay = NANOSECONDS_PER_SECOND * ticks / 5000000;
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timer_mod(s->watchdog, s->wt_last_update + delay);
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}
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static void dp8393x_update_wt_regs(dp8393xState *s)
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{
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int64_t elapsed;
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uint32_t val;
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if (s->regs[SONIC_CR] & SONIC_CR_STP) {
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timer_del(s->watchdog);
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return;
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}
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elapsed = s->wt_last_update - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
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val = dp8393x_wt(s);
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val -= elapsed / 5000000;
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s->regs[SONIC_WT1] = (val >> 16) & 0xffff;
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s->regs[SONIC_WT0] = (val >> 0) & 0xffff;
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dp8393x_set_next_tick(s);
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}
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static void dp8393x_do_start_timer(dp8393xState *s)
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{
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s->regs[SONIC_CR] &= ~SONIC_CR_STP;
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dp8393x_set_next_tick(s);
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}
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static void dp8393x_do_stop_timer(dp8393xState *s)
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{
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s->regs[SONIC_CR] &= ~SONIC_CR_ST;
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dp8393x_update_wt_regs(s);
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}
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static bool dp8393x_can_receive(NetClientState *nc);
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static void dp8393x_do_receiver_enable(dp8393xState *s)
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{
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s->regs[SONIC_CR] &= ~SONIC_CR_RXDIS;
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if (dp8393x_can_receive(s->nic->ncs)) {
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qemu_flush_queued_packets(qemu_get_queue(s->nic));
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}
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}
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static void dp8393x_do_receiver_disable(dp8393xState *s)
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{
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s->regs[SONIC_CR] &= ~SONIC_CR_RXEN;
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}
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static void dp8393x_do_transmit_packets(dp8393xState *s)
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{
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NetClientState *nc = qemu_get_queue(s->nic);
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int tx_len, len;
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uint16_t i;
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while (1) {
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/* Read memory */
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s->regs[SONIC_TTDA] = s->regs[SONIC_CTDA];
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trace_dp8393x_transmit_packet(dp8393x_ttda(s));
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tx_len = 0;
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/* Update registers */
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s->regs[SONIC_TCR] = dp8393x_get(s, dp8393x_ttda(s), 1) & 0xf000;
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s->regs[SONIC_TPS] = dp8393x_get(s, dp8393x_ttda(s), 2);
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s->regs[SONIC_TFC] = dp8393x_get(s, dp8393x_ttda(s), 3);
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s->regs[SONIC_TSA0] = dp8393x_get(s, dp8393x_ttda(s), 4);
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s->regs[SONIC_TSA1] = dp8393x_get(s, dp8393x_ttda(s), 5);
|
|
s->regs[SONIC_TFS] = dp8393x_get(s, dp8393x_ttda(s), 6);
|
|
|
|
/* Handle programmable interrupt */
|
|
if (s->regs[SONIC_TCR] & SONIC_TCR_PINT) {
|
|
s->regs[SONIC_ISR] |= SONIC_ISR_PINT;
|
|
} else {
|
|
s->regs[SONIC_ISR] &= ~SONIC_ISR_PINT;
|
|
}
|
|
|
|
for (i = 0; i < s->regs[SONIC_TFC]; ) {
|
|
/* Append fragment */
|
|
len = s->regs[SONIC_TFS];
|
|
if (tx_len + len > sizeof(s->tx_buffer)) {
|
|
len = sizeof(s->tx_buffer) - tx_len;
|
|
}
|
|
address_space_read(&s->as, dp8393x_tsa(s), MEMTXATTRS_UNSPECIFIED,
|
|
&s->tx_buffer[tx_len], len);
|
|
tx_len += len;
|
|
|
|
i++;
|
|
if (i != s->regs[SONIC_TFC]) {
|
|
/* Read next fragment details */
|
|
s->regs[SONIC_TSA0] = dp8393x_get(s, dp8393x_ttda(s),
|
|
4 + 3 * i);
|
|
s->regs[SONIC_TSA1] = dp8393x_get(s, dp8393x_ttda(s),
|
|
5 + 3 * i);
|
|
s->regs[SONIC_TFS] = dp8393x_get(s, dp8393x_ttda(s),
|
|
6 + 3 * i);
|
|
}
|
|
}
|
|
|
|
/* Handle Ethernet checksum */
|
|
if (!(s->regs[SONIC_TCR] & SONIC_TCR_CRCI)) {
|
|
/*
|
|
* Don't append FCS there, to look like slirp packets
|
|
* which don't have one
|
|
*/
|
|
} else {
|
|
/* Remove existing FCS */
|
|
tx_len -= 4;
|
|
if (tx_len < 0) {
|
|
trace_dp8393x_transmit_txlen_error(tx_len);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (s->regs[SONIC_RCR] & (SONIC_RCR_LB1 | SONIC_RCR_LB0)) {
|
|
/* Loopback */
|
|
s->regs[SONIC_TCR] |= SONIC_TCR_CRSL;
|
|
if (nc->info->can_receive(nc)) {
|
|
s->loopback_packet = 1;
|
|
qemu_receive_packet(nc, s->tx_buffer, tx_len);
|
|
}
|
|
} else {
|
|
/* Transmit packet */
|
|
qemu_send_packet(nc, s->tx_buffer, tx_len);
|
|
}
|
|
s->regs[SONIC_TCR] |= SONIC_TCR_PTX;
|
|
|
|
/* Write status */
|
|
dp8393x_put(s, dp8393x_ttda(s), 0, s->regs[SONIC_TCR] & 0x0fff);
|
|
|
|
if (!(s->regs[SONIC_CR] & SONIC_CR_HTX)) {
|
|
/* Read footer of packet */
|
|
s->regs[SONIC_CTDA] = dp8393x_get(s, dp8393x_ttda(s),
|
|
4 + 3 * s->regs[SONIC_TFC]);
|
|
if (s->regs[SONIC_CTDA] & SONIC_DESC_EOL) {
|
|
/* EOL detected */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Done */
|
|
s->regs[SONIC_CR] &= ~SONIC_CR_TXP;
|
|
s->regs[SONIC_ISR] |= SONIC_ISR_TXDN;
|
|
dp8393x_update_irq(s);
|
|
}
|
|
|
|
static void dp8393x_do_halt_transmission(dp8393xState *s)
|
|
{
|
|
/* Nothing to do */
|
|
}
|
|
|
|
static void dp8393x_do_command(dp8393xState *s, uint16_t command)
|
|
{
|
|
if ((s->regs[SONIC_CR] & SONIC_CR_RST) && !(command & SONIC_CR_RST)) {
|
|
s->regs[SONIC_CR] &= ~SONIC_CR_RST;
|
|
return;
|
|
}
|
|
|
|
s->regs[SONIC_CR] |= (command & SONIC_CR_MASK);
|
|
|
|
if (command & SONIC_CR_HTX) {
|
|
dp8393x_do_halt_transmission(s);
|
|
}
|
|
if (command & SONIC_CR_TXP) {
|
|
dp8393x_do_transmit_packets(s);
|
|
}
|
|
if (command & SONIC_CR_RXDIS) {
|
|
dp8393x_do_receiver_disable(s);
|
|
}
|
|
if (command & SONIC_CR_RXEN) {
|
|
dp8393x_do_receiver_enable(s);
|
|
}
|
|
if (command & SONIC_CR_STP) {
|
|
dp8393x_do_stop_timer(s);
|
|
}
|
|
if (command & SONIC_CR_ST) {
|
|
dp8393x_do_start_timer(s);
|
|
}
|
|
if (command & SONIC_CR_RST) {
|
|
dp8393x_do_software_reset(s);
|
|
}
|
|
if (command & SONIC_CR_RRRA) {
|
|
dp8393x_do_read_rra(s);
|
|
s->regs[SONIC_CR] &= ~SONIC_CR_RRRA;
|
|
}
|
|
if (command & SONIC_CR_LCAM) {
|
|
dp8393x_do_load_cam(s);
|
|
}
|
|
}
|
|
|
|
static uint64_t dp8393x_read(void *opaque, hwaddr addr, unsigned int size)
|
|
{
|
|
dp8393xState *s = opaque;
|
|
int reg = addr >> s->it_shift;
|
|
uint16_t val = 0;
|
|
|
|
switch (reg) {
|
|
/* Update data before reading it */
|
|
case SONIC_WT0:
|
|
case SONIC_WT1:
|
|
dp8393x_update_wt_regs(s);
|
|
val = s->regs[reg];
|
|
break;
|
|
/* Accept read to some registers only when in reset mode */
|
|
case SONIC_CAP2:
|
|
case SONIC_CAP1:
|
|
case SONIC_CAP0:
|
|
if (s->regs[SONIC_CR] & SONIC_CR_RST) {
|
|
val = s->cam[s->regs[SONIC_CEP] & 0xf][SONIC_CAP0 - reg];
|
|
}
|
|
break;
|
|
/* All other registers have no special contraints */
|
|
default:
|
|
val = s->regs[reg];
|
|
}
|
|
|
|
trace_dp8393x_read(reg, reg_names[reg], val, size);
|
|
|
|
return val;
|
|
}
|
|
|
|
static void dp8393x_write(void *opaque, hwaddr addr, uint64_t val,
|
|
unsigned int size)
|
|
{
|
|
dp8393xState *s = opaque;
|
|
int reg = addr >> s->it_shift;
|
|
|
|
trace_dp8393x_write(reg, reg_names[reg], val, size);
|
|
|
|
switch (reg) {
|
|
/* Command register */
|
|
case SONIC_CR:
|
|
dp8393x_do_command(s, val);
|
|
break;
|
|
/* Prevent write to read-only registers */
|
|
case SONIC_CAP2:
|
|
case SONIC_CAP1:
|
|
case SONIC_CAP0:
|
|
case SONIC_SR:
|
|
case SONIC_MDT:
|
|
trace_dp8393x_write_invalid(reg);
|
|
break;
|
|
/* Accept write to some registers only when in reset mode */
|
|
case SONIC_DCR:
|
|
if (s->regs[SONIC_CR] & SONIC_CR_RST) {
|
|
s->regs[reg] = val & 0xbfff;
|
|
} else {
|
|
trace_dp8393x_write_invalid_dcr("DCR");
|
|
}
|
|
break;
|
|
case SONIC_DCR2:
|
|
if (s->regs[SONIC_CR] & SONIC_CR_RST) {
|
|
s->regs[reg] = val & 0xf017;
|
|
} else {
|
|
trace_dp8393x_write_invalid_dcr("DCR2");
|
|
}
|
|
break;
|
|
/* 12 lower bytes are Read Only */
|
|
case SONIC_TCR:
|
|
s->regs[reg] = val & 0xf000;
|
|
break;
|
|
/* 9 lower bytes are Read Only */
|
|
case SONIC_RCR:
|
|
s->regs[reg] = val & 0xffe0;
|
|
break;
|
|
/* Ignore most significant bit */
|
|
case SONIC_IMR:
|
|
s->regs[reg] = val & 0x7fff;
|
|
dp8393x_update_irq(s);
|
|
break;
|
|
/* Clear bits by writing 1 to them */
|
|
case SONIC_ISR:
|
|
val &= s->regs[reg];
|
|
s->regs[reg] &= ~val;
|
|
if (val & SONIC_ISR_RBE) {
|
|
dp8393x_do_read_rra(s);
|
|
}
|
|
dp8393x_update_irq(s);
|
|
break;
|
|
/* The guest is required to store aligned pointers here */
|
|
case SONIC_RSA:
|
|
case SONIC_REA:
|
|
case SONIC_RRP:
|
|
case SONIC_RWP:
|
|
if (s->regs[SONIC_DCR] & SONIC_DCR_DW) {
|
|
s->regs[reg] = val & 0xfffc;
|
|
} else {
|
|
s->regs[reg] = val & 0xfffe;
|
|
}
|
|
break;
|
|
/* Invert written value for some registers */
|
|
case SONIC_CRCT:
|
|
case SONIC_FAET:
|
|
case SONIC_MPT:
|
|
s->regs[reg] = val ^ 0xffff;
|
|
break;
|
|
/* All other registers have no special contrainst */
|
|
default:
|
|
s->regs[reg] = val;
|
|
}
|
|
|
|
if (reg == SONIC_WT0 || reg == SONIC_WT1) {
|
|
dp8393x_set_next_tick(s);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Since .impl.max_access_size is effectively controlled by the it_shift
|
|
* property, leave it unspecified for now to allow the memory API to
|
|
* correctly zero extend the 16-bit register values to the access size up to and
|
|
* including it_shift.
|
|
*/
|
|
static const MemoryRegionOps dp8393x_ops = {
|
|
.read = dp8393x_read,
|
|
.write = dp8393x_write,
|
|
.impl.min_access_size = 2,
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
};
|
|
|
|
static void dp8393x_watchdog(void *opaque)
|
|
{
|
|
dp8393xState *s = opaque;
|
|
|
|
if (s->regs[SONIC_CR] & SONIC_CR_STP) {
|
|
return;
|
|
}
|
|
|
|
s->regs[SONIC_WT1] = 0xffff;
|
|
s->regs[SONIC_WT0] = 0xffff;
|
|
dp8393x_set_next_tick(s);
|
|
|
|
/* Signal underflow */
|
|
s->regs[SONIC_ISR] |= SONIC_ISR_TC;
|
|
dp8393x_update_irq(s);
|
|
}
|
|
|
|
static bool dp8393x_can_receive(NetClientState *nc)
|
|
{
|
|
dp8393xState *s = qemu_get_nic_opaque(nc);
|
|
|
|
return !!(s->regs[SONIC_CR] & SONIC_CR_RXEN);
|
|
}
|
|
|
|
static int dp8393x_receive_filter(dp8393xState *s, const uint8_t * buf,
|
|
int size)
|
|
{
|
|
static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
|
|
int i;
|
|
|
|
/* Check promiscuous mode */
|
|
if ((s->regs[SONIC_RCR] & SONIC_RCR_PRO) && (buf[0] & 1) == 0) {
|
|
return 0;
|
|
}
|
|
|
|
/* Check multicast packets */
|
|
if ((s->regs[SONIC_RCR] & SONIC_RCR_AMC) && (buf[0] & 1) == 1) {
|
|
return SONIC_RCR_MC;
|
|
}
|
|
|
|
/* Check broadcast */
|
|
if ((s->regs[SONIC_RCR] & SONIC_RCR_BRD) &&
|
|
!memcmp(buf, bcast, sizeof(bcast))) {
|
|
return SONIC_RCR_BC;
|
|
}
|
|
|
|
/* Check CAM */
|
|
for (i = 0; i < 16; i++) {
|
|
if (s->regs[SONIC_CE] & (1 << i)) {
|
|
/* Entry enabled */
|
|
if (!memcmp(buf, s->cam[i], sizeof(s->cam[i]))) {
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static ssize_t dp8393x_receive(NetClientState *nc, const uint8_t * buf,
|
|
size_t pkt_size)
|
|
{
|
|
dp8393xState *s = qemu_get_nic_opaque(nc);
|
|
int packet_type;
|
|
uint32_t available, address;
|
|
int rx_len, padded_len;
|
|
uint32_t checksum;
|
|
int size;
|
|
|
|
s->regs[SONIC_RCR] &= ~(SONIC_RCR_PRX | SONIC_RCR_LBK | SONIC_RCR_FAER |
|
|
SONIC_RCR_CRCR | SONIC_RCR_LPKT | SONIC_RCR_BC | SONIC_RCR_MC);
|
|
|
|
if (s->last_rba_is_full) {
|
|
return pkt_size;
|
|
}
|
|
|
|
rx_len = pkt_size + sizeof(checksum);
|
|
if (s->regs[SONIC_DCR] & SONIC_DCR_DW) {
|
|
padded_len = ((rx_len - 1) | 3) + 1;
|
|
} else {
|
|
padded_len = ((rx_len - 1) | 1) + 1;
|
|
}
|
|
|
|
if (padded_len > dp8393x_rbwc(s) * 2) {
|
|
trace_dp8393x_receive_oversize(pkt_size);
|
|
s->regs[SONIC_ISR] |= SONIC_ISR_RBAE;
|
|
dp8393x_update_irq(s);
|
|
s->regs[SONIC_RCR] |= SONIC_RCR_LPKT;
|
|
goto done;
|
|
}
|
|
|
|
packet_type = dp8393x_receive_filter(s, buf, pkt_size);
|
|
if (packet_type < 0) {
|
|
trace_dp8393x_receive_not_netcard();
|
|
return -1;
|
|
}
|
|
|
|
/* Check for EOL */
|
|
if (s->regs[SONIC_LLFA] & SONIC_DESC_EOL) {
|
|
/* Are we still in resource exhaustion? */
|
|
s->regs[SONIC_LLFA] = dp8393x_get(s, dp8393x_crda(s), 5);
|
|
if (s->regs[SONIC_LLFA] & SONIC_DESC_EOL) {
|
|
/* Still EOL ; stop reception */
|
|
return -1;
|
|
}
|
|
/* Link has been updated by host */
|
|
|
|
/* Clear in_use */
|
|
dp8393x_put(s, dp8393x_crda(s), 6, 0x0000);
|
|
|
|
/* Move to next descriptor */
|
|
s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA];
|
|
s->regs[SONIC_ISR] |= SONIC_ISR_PKTRX;
|
|
}
|
|
|
|
/* Save current position */
|
|
s->regs[SONIC_TRBA1] = s->regs[SONIC_CRBA1];
|
|
s->regs[SONIC_TRBA0] = s->regs[SONIC_CRBA0];
|
|
|
|
/* Calculate the ethernet checksum */
|
|
checksum = cpu_to_le32(crc32(0, buf, pkt_size));
|
|
|
|
/* Put packet into RBA */
|
|
trace_dp8393x_receive_packet(dp8393x_crba(s));
|
|
address = dp8393x_crba(s);
|
|
address_space_write(&s->as, address, MEMTXATTRS_UNSPECIFIED,
|
|
buf, pkt_size);
|
|
address += pkt_size;
|
|
|
|
/* Put frame checksum into RBA */
|
|
address_space_write(&s->as, address, MEMTXATTRS_UNSPECIFIED,
|
|
&checksum, sizeof(checksum));
|
|
address += sizeof(checksum);
|
|
|
|
/* Pad short packets to keep pointers aligned */
|
|
if (rx_len < padded_len) {
|
|
size = padded_len - rx_len;
|
|
address_space_write(&s->as, address, MEMTXATTRS_UNSPECIFIED,
|
|
"\xFF\xFF\xFF", size);
|
|
address += size;
|
|
}
|
|
|
|
s->regs[SONIC_CRBA1] = address >> 16;
|
|
s->regs[SONIC_CRBA0] = address & 0xffff;
|
|
available = dp8393x_rbwc(s);
|
|
available -= padded_len >> 1;
|
|
s->regs[SONIC_RBWC1] = available >> 16;
|
|
s->regs[SONIC_RBWC0] = available & 0xffff;
|
|
|
|
/* Update status */
|
|
if (dp8393x_rbwc(s) < s->regs[SONIC_EOBC]) {
|
|
s->regs[SONIC_RCR] |= SONIC_RCR_LPKT;
|
|
}
|
|
s->regs[SONIC_RCR] |= packet_type;
|
|
s->regs[SONIC_RCR] |= SONIC_RCR_PRX;
|
|
if (s->loopback_packet) {
|
|
s->regs[SONIC_RCR] |= SONIC_RCR_LBK;
|
|
s->loopback_packet = 0;
|
|
}
|
|
|
|
/* Write status to memory */
|
|
trace_dp8393x_receive_write_status(dp8393x_crda(s));
|
|
dp8393x_put(s, dp8393x_crda(s), 0, s->regs[SONIC_RCR]); /* status */
|
|
dp8393x_put(s, dp8393x_crda(s), 1, rx_len); /* byte count */
|
|
dp8393x_put(s, dp8393x_crda(s), 2, s->regs[SONIC_TRBA0]); /* pkt_ptr0 */
|
|
dp8393x_put(s, dp8393x_crda(s), 3, s->regs[SONIC_TRBA1]); /* pkt_ptr1 */
|
|
dp8393x_put(s, dp8393x_crda(s), 4, s->regs[SONIC_RSC]); /* seq_no */
|
|
|
|
/* Check link field */
|
|
s->regs[SONIC_LLFA] = dp8393x_get(s, dp8393x_crda(s), 5);
|
|
if (s->regs[SONIC_LLFA] & SONIC_DESC_EOL) {
|
|
/* EOL detected */
|
|
s->regs[SONIC_ISR] |= SONIC_ISR_RDE;
|
|
} else {
|
|
/* Clear in_use */
|
|
dp8393x_put(s, dp8393x_crda(s), 6, 0x0000);
|
|
|
|
/* Move to next descriptor */
|
|
s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA];
|
|
s->regs[SONIC_ISR] |= SONIC_ISR_PKTRX;
|
|
}
|
|
|
|
dp8393x_update_irq(s);
|
|
|
|
s->regs[SONIC_RSC] = (s->regs[SONIC_RSC] & 0xff00) |
|
|
((s->regs[SONIC_RSC] + 1) & 0x00ff);
|
|
|
|
done:
|
|
|
|
if (s->regs[SONIC_RCR] & SONIC_RCR_LPKT) {
|
|
if (s->regs[SONIC_RRP] == s->regs[SONIC_RWP]) {
|
|
/* Stop packet reception */
|
|
s->last_rba_is_full = true;
|
|
} else {
|
|
/* Read next resource */
|
|
dp8393x_do_read_rra(s);
|
|
}
|
|
}
|
|
|
|
return pkt_size;
|
|
}
|
|
|
|
static void dp8393x_reset(DeviceState *dev)
|
|
{
|
|
dp8393xState *s = DP8393X(dev);
|
|
timer_del(s->watchdog);
|
|
|
|
memset(s->regs, 0, sizeof(s->regs));
|
|
s->regs[SONIC_SR] = 0x0004; /* only revision recognized by Linux/mips */
|
|
s->regs[SONIC_CR] = SONIC_CR_RST | SONIC_CR_STP | SONIC_CR_RXDIS;
|
|
s->regs[SONIC_DCR] &= ~(SONIC_DCR_EXBUS | SONIC_DCR_LBR);
|
|
s->regs[SONIC_RCR] &= ~(SONIC_RCR_LB0 | SONIC_RCR_LB1 | SONIC_RCR_BRD |
|
|
SONIC_RCR_RNT);
|
|
s->regs[SONIC_TCR] |= SONIC_TCR_NCRS | SONIC_TCR_PTX;
|
|
s->regs[SONIC_TCR] &= ~SONIC_TCR_BCM;
|
|
s->regs[SONIC_IMR] = 0;
|
|
s->regs[SONIC_ISR] = 0;
|
|
s->regs[SONIC_DCR2] = 0;
|
|
s->regs[SONIC_EOBC] = 0x02F8;
|
|
s->regs[SONIC_RSC] = 0;
|
|
s->regs[SONIC_CE] = 0;
|
|
s->regs[SONIC_RSC] = 0;
|
|
|
|
/* Network cable is connected */
|
|
s->regs[SONIC_RCR] |= SONIC_RCR_CRS;
|
|
|
|
dp8393x_update_irq(s);
|
|
}
|
|
|
|
static NetClientInfo net_dp83932_info = {
|
|
.type = NET_CLIENT_DRIVER_NIC,
|
|
.size = sizeof(NICState),
|
|
.can_receive = dp8393x_can_receive,
|
|
.receive = dp8393x_receive,
|
|
};
|
|
|
|
static void dp8393x_instance_init(Object *obj)
|
|
{
|
|
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
|
|
dp8393xState *s = DP8393X(obj);
|
|
|
|
sysbus_init_mmio(sbd, &s->mmio);
|
|
sysbus_init_irq(sbd, &s->irq);
|
|
}
|
|
|
|
static void dp8393x_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
dp8393xState *s = DP8393X(dev);
|
|
|
|
address_space_init(&s->as, s->dma_mr, "dp8393x");
|
|
memory_region_init_io(&s->mmio, OBJECT(dev), &dp8393x_ops, s,
|
|
"dp8393x-regs", SONIC_REG_COUNT << s->it_shift);
|
|
|
|
s->nic = qemu_new_nic(&net_dp83932_info, &s->conf,
|
|
object_get_typename(OBJECT(dev)), dev->id, s);
|
|
qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
|
|
|
|
s->watchdog = timer_new_ns(QEMU_CLOCK_VIRTUAL, dp8393x_watchdog, s);
|
|
}
|
|
|
|
static const VMStateDescription vmstate_dp8393x = {
|
|
.name = "dp8393x",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (VMStateField []) {
|
|
VMSTATE_UINT16_2DARRAY(cam, dp8393xState, 16, 3),
|
|
VMSTATE_UINT16_ARRAY(regs, dp8393xState, SONIC_REG_COUNT),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static Property dp8393x_properties[] = {
|
|
DEFINE_NIC_PROPERTIES(dp8393xState, conf),
|
|
DEFINE_PROP_LINK("dma_mr", dp8393xState, dma_mr,
|
|
TYPE_MEMORY_REGION, MemoryRegion *),
|
|
DEFINE_PROP_UINT8("it_shift", dp8393xState, it_shift, 0),
|
|
DEFINE_PROP_BOOL("big_endian", dp8393xState, big_endian, false),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void dp8393x_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
|
|
dc->realize = dp8393x_realize;
|
|
dc->reset = dp8393x_reset;
|
|
dc->vmsd = &vmstate_dp8393x;
|
|
device_class_set_props(dc, dp8393x_properties);
|
|
}
|
|
|
|
static const TypeInfo dp8393x_info = {
|
|
.name = TYPE_DP8393X,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(dp8393xState),
|
|
.instance_init = dp8393x_instance_init,
|
|
.class_init = dp8393x_class_init,
|
|
};
|
|
|
|
static void dp8393x_register_types(void)
|
|
{
|
|
type_register_static(&dp8393x_info);
|
|
}
|
|
|
|
type_init(dp8393x_register_types)
|