esp: add AMD PCscsi emulation (PCI SCSI adapter)

The PCI version is supported in lots of Operating Systems,
and has been successfully tested on:
- MS DOS 6.22 (using DC390 driver)
- MS Windows 3.11 (using DC390 driver)
- MS Windows 98 SE (using default driver)
- MS Windows NT 3.1 (using DC390 driver)
- MS Windows NT 4.0 (using default driver)

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Hervé Poussineau 2012-07-09 12:02:31 +02:00 committed by Blue Swirl
parent 0883c5159f
commit fabaaf1d1f
4 changed files with 380 additions and 0 deletions

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@ -25,3 +25,4 @@ CONFIG_HPET=y
CONFIG_APPLESMC=y CONFIG_APPLESMC=y
CONFIG_I8259=y CONFIG_I8259=y
CONFIG_PFLASH_CFI01=y CONFIG_PFLASH_CFI01=y
CONFIG_ESP=y

366
hw/esp.c
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@ -2,6 +2,7 @@
* QEMU ESP/NCR53C9x emulation * QEMU ESP/NCR53C9x emulation
* *
* Copyright (c) 2005-2006 Fabrice Bellard * Copyright (c) 2005-2006 Fabrice Bellard
* Copyright (c) 2012 Herve Poussineau
* *
* Permission is hereby granted, free of charge, to any person obtaining a copy * Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal * of this software and associated documentation files (the "Software"), to deal
@ -23,6 +24,7 @@
*/ */
#include "sysbus.h" #include "sysbus.h"
#include "pci.h"
#include "scsi.h" #include "scsi.h"
#include "esp.h" #include "esp.h"
#include "trace.h" #include "trace.h"
@ -142,6 +144,7 @@ struct ESPState {
#define CFG1_RESREPT 0x40 #define CFG1_RESREPT 0x40
#define TCHI_FAS100A 0x4 #define TCHI_FAS100A 0x4
#define TCHI_AM53C974 0x12
static void esp_raise_irq(ESPState *s) static void esp_raise_irq(ESPState *s)
{ {
@ -820,9 +823,372 @@ static TypeInfo sysbus_esp_info = {
.class_init = sysbus_esp_class_init, .class_init = sysbus_esp_class_init,
}; };
#define DMA_CMD 0x0
#define DMA_STC 0x1
#define DMA_SPA 0x2
#define DMA_WBC 0x3
#define DMA_WAC 0x4
#define DMA_STAT 0x5
#define DMA_SMDLA 0x6
#define DMA_WMAC 0x7
#define DMA_CMD_MASK 0x03
#define DMA_CMD_DIAG 0x04
#define DMA_CMD_MDL 0x10
#define DMA_CMD_INTE_P 0x20
#define DMA_CMD_INTE_D 0x40
#define DMA_CMD_DIR 0x80
#define DMA_STAT_PWDN 0x01
#define DMA_STAT_ERROR 0x02
#define DMA_STAT_ABORT 0x04
#define DMA_STAT_DONE 0x08
#define DMA_STAT_SCSIINT 0x10
#define DMA_STAT_BCMBLT 0x20
#define SBAC_STATUS 0x1000
typedef struct PCIESPState {
PCIDevice dev;
MemoryRegion io;
uint32_t dma_regs[8];
uint32_t sbac;
ESPState esp;
} PCIESPState;
static void esp_pci_handle_idle(PCIESPState *pci, uint32_t val)
{
trace_esp_pci_dma_idle(val);
esp_dma_enable(&pci->esp, 0, 0);
}
static void esp_pci_handle_blast(PCIESPState *pci, uint32_t val)
{
trace_esp_pci_dma_blast(val);
qemu_log_mask(LOG_UNIMP, "am53c974: cmd BLAST not implemented\n");
}
static void esp_pci_handle_abort(PCIESPState *pci, uint32_t val)
{
trace_esp_pci_dma_abort(val);
if (pci->esp.current_req) {
scsi_req_cancel(pci->esp.current_req);
}
}
static void esp_pci_handle_start(PCIESPState *pci, uint32_t val)
{
trace_esp_pci_dma_start(val);
pci->dma_regs[DMA_WBC] = pci->dma_regs[DMA_STC];
pci->dma_regs[DMA_WAC] = pci->dma_regs[DMA_SPA];
pci->dma_regs[DMA_WMAC] = pci->dma_regs[DMA_SMDLA];
pci->dma_regs[DMA_STAT] &= ~(DMA_STAT_BCMBLT | DMA_STAT_SCSIINT
| DMA_STAT_DONE | DMA_STAT_ABORT
| DMA_STAT_ERROR | DMA_STAT_PWDN);
esp_dma_enable(&pci->esp, 0, 1);
}
static void esp_pci_dma_write(PCIESPState *pci, uint32_t saddr, uint32_t val)
{
trace_esp_pci_dma_write(saddr, pci->dma_regs[saddr], val);
switch (saddr) {
case DMA_CMD:
pci->dma_regs[saddr] = val;
switch (val & DMA_CMD_MASK) {
case 0x0: /* IDLE */
esp_pci_handle_idle(pci, val);
break;
case 0x1: /* BLAST */
esp_pci_handle_blast(pci, val);
break;
case 0x2: /* ABORT */
esp_pci_handle_abort(pci, val);
break;
case 0x3: /* START */
esp_pci_handle_start(pci, val);
break;
default: /* can't happen */
abort();
}
break;
case DMA_STC:
case DMA_SPA:
case DMA_SMDLA:
pci->dma_regs[saddr] = val;
break;
case DMA_STAT:
if (!(pci->sbac & SBAC_STATUS)) {
/* clear some bits on write */
uint32_t mask = DMA_STAT_ERROR | DMA_STAT_ABORT | DMA_STAT_DONE;
pci->dma_regs[DMA_STAT] &= ~(val & mask);
}
break;
default:
trace_esp_pci_error_invalid_write_dma(val, saddr);
return;
}
}
static uint32_t esp_pci_dma_read(PCIESPState *pci, uint32_t saddr)
{
uint32_t val;
val = pci->dma_regs[saddr];
if (saddr == DMA_STAT) {
if (pci->esp.rregs[ESP_RSTAT] & STAT_INT) {
val |= DMA_STAT_SCSIINT;
}
if (pci->sbac & SBAC_STATUS) {
pci->dma_regs[DMA_STAT] &= ~(DMA_STAT_ERROR | DMA_STAT_ABORT |
DMA_STAT_DONE);
}
}
trace_esp_pci_dma_read(saddr, val);
return val;
}
static void esp_pci_io_write(void *opaque, target_phys_addr_t addr,
uint64_t val, unsigned int size)
{
PCIESPState *pci = opaque;
if (size < 4 || addr & 3) {
/* need to upgrade request: we only support 4-bytes accesses */
uint32_t current = 0, mask;
int shift;
if (addr < 0x40) {
current = pci->esp.wregs[addr >> 2];
} else if (addr < 0x60) {
current = pci->dma_regs[(addr - 0x40) >> 2];
} else if (addr < 0x74) {
current = pci->sbac;
}
shift = (4 - size) * 8;
mask = (~(uint32_t)0 << shift) >> shift;
shift = ((4 - (addr & 3)) & 3) * 8;
val <<= shift;
val |= current & ~(mask << shift);
addr &= ~3;
size = 4;
}
if (addr < 0x40) {
/* SCSI core reg */
esp_reg_write(&pci->esp, addr >> 2, val);
} else if (addr < 0x60) {
/* PCI DMA CCB */
esp_pci_dma_write(pci, (addr - 0x40) >> 2, val);
} else if (addr == 0x70) {
/* DMA SCSI Bus and control */
trace_esp_pci_sbac_write(pci->sbac, val);
pci->sbac = val;
} else {
trace_esp_pci_error_invalid_write((int)addr);
}
}
static uint64_t esp_pci_io_read(void *opaque, target_phys_addr_t addr,
unsigned int size)
{
PCIESPState *pci = opaque;
uint32_t ret;
if (addr < 0x40) {
/* SCSI core reg */
ret = esp_reg_read(&pci->esp, addr >> 2);
} else if (addr < 0x60) {
/* PCI DMA CCB */
ret = esp_pci_dma_read(pci, (addr - 0x40) >> 2);
} else if (addr == 0x70) {
/* DMA SCSI Bus and control */
trace_esp_pci_sbac_read(pci->sbac);
ret = pci->sbac;
} else {
/* Invalid region */
trace_esp_pci_error_invalid_read((int)addr);
ret = 0;
}
/* give only requested data */
ret >>= (addr & 3) * 8;
ret &= ~(~(uint64_t)0 << (8 * size));
return ret;
}
static void esp_pci_dma_memory_rw(PCIESPState *pci, uint8_t *buf, int len,
DMADirection dir)
{
dma_addr_t addr;
DMADirection expected_dir;
if (pci->dma_regs[DMA_CMD] & DMA_CMD_DIR) {
expected_dir = DMA_DIRECTION_FROM_DEVICE;
} else {
expected_dir = DMA_DIRECTION_TO_DEVICE;
}
if (dir != expected_dir) {
trace_esp_pci_error_invalid_dma_direction();
return;
}
if (pci->dma_regs[DMA_STAT] & DMA_CMD_MDL) {
qemu_log_mask(LOG_UNIMP, "am53c974: MDL transfer not implemented\n");
}
addr = pci->dma_regs[DMA_SPA];
if (pci->dma_regs[DMA_WBC] < len) {
len = pci->dma_regs[DMA_WBC];
}
pci_dma_rw(&pci->dev, addr, buf, len, dir);
/* update status registers */
pci->dma_regs[DMA_WBC] -= len;
pci->dma_regs[DMA_WAC] += len;
}
static void esp_pci_dma_memory_read(void *opaque, uint8_t *buf, int len)
{
PCIESPState *pci = opaque;
esp_pci_dma_memory_rw(pci, buf, len, DMA_DIRECTION_TO_DEVICE);
}
static void esp_pci_dma_memory_write(void *opaque, uint8_t *buf, int len)
{
PCIESPState *pci = opaque;
esp_pci_dma_memory_rw(pci, buf, len, DMA_DIRECTION_FROM_DEVICE);
}
static const MemoryRegionOps esp_pci_io_ops = {
.read = esp_pci_io_read,
.write = esp_pci_io_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.impl = {
.min_access_size = 1,
.max_access_size = 4,
},
};
static void esp_pci_hard_reset(DeviceState *dev)
{
PCIESPState *pci = DO_UPCAST(PCIESPState, dev.qdev, dev);
esp_hard_reset(&pci->esp);
pci->dma_regs[DMA_CMD] &= ~(DMA_CMD_DIR | DMA_CMD_INTE_D | DMA_CMD_INTE_P
| DMA_CMD_MDL | DMA_CMD_DIAG | DMA_CMD_MASK);
pci->dma_regs[DMA_WBC] &= ~0xffff;
pci->dma_regs[DMA_WAC] = 0xffffffff;
pci->dma_regs[DMA_STAT] &= ~(DMA_STAT_BCMBLT | DMA_STAT_SCSIINT
| DMA_STAT_DONE | DMA_STAT_ABORT
| DMA_STAT_ERROR);
pci->dma_regs[DMA_WMAC] = 0xfffffffd;
}
static const VMStateDescription vmstate_esp_pci_scsi = {
.name = "pciespscsi",
.version_id = 0,
.minimum_version_id = 0,
.minimum_version_id_old = 0,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(dev, PCIESPState),
VMSTATE_BUFFER_UNSAFE(dma_regs, PCIESPState, 0, 8 * sizeof(uint32_t)),
VMSTATE_STRUCT(esp, PCIESPState, 0, vmstate_esp, ESPState),
VMSTATE_END_OF_LIST()
}
};
static void esp_pci_command_complete(SCSIRequest *req, uint32_t status,
size_t resid)
{
ESPState *s = req->hba_private;
PCIESPState *pci = container_of(s, PCIESPState, esp);
esp_command_complete(req, status, resid);
pci->dma_regs[DMA_WBC] = 0;
pci->dma_regs[DMA_STAT] |= DMA_STAT_DONE;
}
static const struct SCSIBusInfo esp_pci_scsi_info = {
.tcq = false,
.max_target = ESP_MAX_DEVS,
.max_lun = 7,
.transfer_data = esp_transfer_data,
.complete = esp_pci_command_complete,
.cancel = esp_request_cancelled,
};
static int esp_pci_scsi_init(PCIDevice *dev)
{
PCIESPState *pci = DO_UPCAST(PCIESPState, dev, dev);
ESPState *s = &pci->esp;
uint8_t *pci_conf;
pci_conf = pci->dev.config;
/* Interrupt pin A */
pci_conf[PCI_INTERRUPT_PIN] = 0x01;
s->dma_memory_read = esp_pci_dma_memory_read;
s->dma_memory_write = esp_pci_dma_memory_write;
s->dma_opaque = pci;
s->chip_id = TCHI_AM53C974;
memory_region_init_io(&pci->io, &esp_pci_io_ops, pci, "esp-io", 0x80);
pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &pci->io);
s->irq = pci->dev.irq[0];
scsi_bus_new(&s->bus, &dev->qdev, &esp_pci_scsi_info);
if (!dev->qdev.hotplugged) {
return scsi_bus_legacy_handle_cmdline(&s->bus);
}
return 0;
}
static int esp_pci_scsi_uninit(PCIDevice *d)
{
PCIESPState *pci = DO_UPCAST(PCIESPState, dev, d);
memory_region_destroy(&pci->io);
return 0;
}
static void esp_pci_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->init = esp_pci_scsi_init;
k->exit = esp_pci_scsi_uninit;
k->vendor_id = PCI_VENDOR_ID_AMD;
k->device_id = PCI_DEVICE_ID_AMD_SCSI;
k->revision = 0x10;
k->class_id = PCI_CLASS_STORAGE_SCSI;
dc->desc = "AMD Am53c974 PCscsi-PCI SCSI adapter";
dc->reset = esp_pci_hard_reset;
dc->vmsd = &vmstate_esp_pci_scsi;
}
static TypeInfo esp_pci_info = {
.name = "am53c974",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PCIESPState),
.class_init = esp_pci_class_init,
};
static void esp_register_types(void) static void esp_register_types(void)
{ {
type_register_static(&sysbus_esp_info); type_register_static(&sysbus_esp_info);
type_register_static(&esp_pci_info);
} }
type_init(esp_register_types) type_init(esp_register_types)

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@ -59,6 +59,7 @@
#define PCI_VENDOR_ID_AMD 0x1022 #define PCI_VENDOR_ID_AMD 0x1022
#define PCI_DEVICE_ID_AMD_LANCE 0x2000 #define PCI_DEVICE_ID_AMD_LANCE 0x2000
#define PCI_DEVICE_ID_AMD_SCSI 0x2020
#define PCI_VENDOR_ID_TI 0x104c #define PCI_VENDOR_ID_TI 0x104c

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@ -760,6 +760,18 @@ esp_mem_writeb_cmd_selatn(uint32_t val) "Select with ATN (%2.2x)"
esp_mem_writeb_cmd_selatns(uint32_t val) "Select with ATN & stop (%2.2x)" esp_mem_writeb_cmd_selatns(uint32_t val) "Select with ATN & stop (%2.2x)"
esp_mem_writeb_cmd_ensel(uint32_t val) "Enable selection (%2.2x)" esp_mem_writeb_cmd_ensel(uint32_t val) "Enable selection (%2.2x)"
esp_mem_writeb_cmd_dissel(uint32_t val) "Disable selection (%2.2x)" esp_mem_writeb_cmd_dissel(uint32_t val) "Disable selection (%2.2x)"
esp_pci_error_invalid_dma_direction(void) "invalid DMA transfer direction"
esp_pci_error_invalid_read(uint32_t reg) "read access outside bounds (reg 0x%x)"
esp_pci_error_invalid_write(uint32_t reg) "write access outside bounds (reg 0x%x)"
esp_pci_error_invalid_write_dma(uint32_t val, uint32_t addr) "invalid write of 0x%02x at [0x%x]"
esp_pci_dma_read(uint32_t saddr, uint32_t reg) "reg[%d]: 0x%8.8x"
esp_pci_dma_write(uint32_t saddr, uint32_t reg, uint32_t val) "reg[%d]: 0x%8.8x -> 0x%8.8x"
esp_pci_dma_idle(uint32_t val) "IDLE (%.8x)"
esp_pci_dma_blast(uint32_t val) "BLAST (%.8x)"
esp_pci_dma_abort(uint32_t val) "ABORT (%.8x)"
esp_pci_dma_start(uint32_t val) "START (%.8x)"
esp_pci_sbac_read(uint32_t reg) "sbac: 0x%8.8x"
esp_pci_sbac_write(uint32_t reg, uint32_t val) "sbac: 0x%8.8x -> 0x%8.8x"
# monitor.c # monitor.c
handle_qmp_command(void *mon, const char *cmd_name) "mon %p cmd_name \"%s\"" handle_qmp_command(void *mon, const char *cmd_name) "mon %p cmd_name \"%s\""