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-rw-r--r--src/hw/scsi/esp-pci.c529
1 files changed, 529 insertions, 0 deletions
diff --git a/src/hw/scsi/esp-pci.c b/src/hw/scsi/esp-pci.c
new file mode 100644
index 0000000..8d2242d
--- /dev/null
+++ b/src/hw/scsi/esp-pci.c
@@ -0,0 +1,529 @@
+/*
+ * QEMU ESP/NCR53C9x emulation
+ *
+ * Copyright (c) 2005-2006 Fabrice Bellard
+ * Copyright (c) 2012 Herve Poussineau
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw/pci/pci.h"
+#include "hw/nvram/eeprom93xx.h"
+#include "hw/scsi/esp.h"
+#include "trace.h"
+#include "qemu/log.h"
+
+#define TYPE_AM53C974_DEVICE "am53c974"
+
+#define PCI_ESP(obj) \
+ OBJECT_CHECK(PCIESPState, (obj), TYPE_AM53C974_DEVICE)
+
+#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 {
+ /*< private >*/
+ PCIDevice parent_obj;
+ /*< public >*/
+
+ 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, hwaddr 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, hwaddr 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_DEVICE(pci), addr, buf, len, dir);
+
+ /* update status registers */
+ pci->dma_regs[DMA_WBC] -= len;
+ pci->dma_regs[DMA_WAC] += len;
+ if (pci->dma_regs[DMA_WBC] == 0) {
+ pci->dma_regs[DMA_STAT] |= DMA_STAT_DONE;
+ }
+}
+
+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 = PCI_ESP(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,
+ .fields = (VMStateField[]) {
+ VMSTATE_PCI_DEVICE(parent_obj, 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 void esp_pci_scsi_realize(PCIDevice *dev, Error **errp)
+{
+ PCIESPState *pci = PCI_ESP(dev);
+ DeviceState *d = DEVICE(dev);
+ ESPState *s = &pci->esp;
+ uint8_t *pci_conf;
+
+ pci_conf = 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, OBJECT(pci), &esp_pci_io_ops, pci,
+ "esp-io", 0x80);
+
+ pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &pci->io);
+ s->irq = pci_allocate_irq(dev);
+
+ scsi_bus_new(&s->bus, sizeof(s->bus), d, &esp_pci_scsi_info, NULL);
+ if (!d->hotplugged) {
+ scsi_bus_legacy_handle_cmdline(&s->bus, errp);
+ }
+}
+
+static void esp_pci_scsi_uninit(PCIDevice *d)
+{
+ PCIESPState *pci = PCI_ESP(d);
+
+ qemu_free_irq(pci->esp.irq);
+}
+
+static void esp_pci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ k->realize = esp_pci_scsi_realize;
+ 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;
+ set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+ dc->desc = "AMD Am53c974 PCscsi-PCI SCSI adapter";
+ dc->reset = esp_pci_hard_reset;
+ dc->vmsd = &vmstate_esp_pci_scsi;
+}
+
+static const TypeInfo esp_pci_info = {
+ .name = TYPE_AM53C974_DEVICE,
+ .parent = TYPE_PCI_DEVICE,
+ .instance_size = sizeof(PCIESPState),
+ .class_init = esp_pci_class_init,
+};
+
+typedef struct {
+ PCIESPState pci;
+ eeprom_t *eeprom;
+} DC390State;
+
+#define TYPE_DC390_DEVICE "dc390"
+#define DC390(obj) \
+ OBJECT_CHECK(DC390State, obj, TYPE_DC390_DEVICE)
+
+#define EE_ADAPT_SCSI_ID 64
+#define EE_MODE2 65
+#define EE_DELAY 66
+#define EE_TAG_CMD_NUM 67
+#define EE_ADAPT_OPTIONS 68
+#define EE_BOOT_SCSI_ID 69
+#define EE_BOOT_SCSI_LUN 70
+#define EE_CHKSUM1 126
+#define EE_CHKSUM2 127
+
+#define EE_ADAPT_OPTION_F6_F8_AT_BOOT 0x01
+#define EE_ADAPT_OPTION_BOOT_FROM_CDROM 0x02
+#define EE_ADAPT_OPTION_INT13 0x04
+#define EE_ADAPT_OPTION_SCAM_SUPPORT 0x08
+
+
+static uint32_t dc390_read_config(PCIDevice *dev, uint32_t addr, int l)
+{
+ DC390State *pci = DC390(dev);
+ uint32_t val;
+
+ val = pci_default_read_config(dev, addr, l);
+
+ if (addr == 0x00 && l == 1) {
+ /* First byte of address space is AND-ed with EEPROM DO line */
+ if (!eeprom93xx_read(pci->eeprom)) {
+ val &= ~0xff;
+ }
+ }
+
+ return val;
+}
+
+static void dc390_write_config(PCIDevice *dev,
+ uint32_t addr, uint32_t val, int l)
+{
+ DC390State *pci = DC390(dev);
+ if (addr == 0x80) {
+ /* EEPROM write */
+ int eesk = val & 0x80 ? 1 : 0;
+ int eedi = val & 0x40 ? 1 : 0;
+ eeprom93xx_write(pci->eeprom, 1, eesk, eedi);
+ } else if (addr == 0xc0) {
+ /* EEPROM CS low */
+ eeprom93xx_write(pci->eeprom, 0, 0, 0);
+ } else {
+ pci_default_write_config(dev, addr, val, l);
+ }
+}
+
+static void dc390_scsi_realize(PCIDevice *dev, Error **errp)
+{
+ DC390State *pci = DC390(dev);
+ Error *err = NULL;
+ uint8_t *contents;
+ uint16_t chksum = 0;
+ int i;
+
+ /* init base class */
+ esp_pci_scsi_realize(dev, &err);
+ if (err) {
+ error_propagate(errp, err);
+ return;
+ }
+
+ /* EEPROM */
+ pci->eeprom = eeprom93xx_new(DEVICE(dev), 64);
+
+ /* set default eeprom values */
+ contents = (uint8_t *)eeprom93xx_data(pci->eeprom);
+
+ for (i = 0; i < 16; i++) {
+ contents[i * 2] = 0x57;
+ contents[i * 2 + 1] = 0x00;
+ }
+ contents[EE_ADAPT_SCSI_ID] = 7;
+ contents[EE_MODE2] = 0x0f;
+ contents[EE_TAG_CMD_NUM] = 0x04;
+ contents[EE_ADAPT_OPTIONS] = EE_ADAPT_OPTION_F6_F8_AT_BOOT
+ | EE_ADAPT_OPTION_BOOT_FROM_CDROM
+ | EE_ADAPT_OPTION_INT13;
+
+ /* update eeprom checksum */
+ for (i = 0; i < EE_CHKSUM1; i += 2) {
+ chksum += contents[i] + (((uint16_t)contents[i + 1]) << 8);
+ }
+ chksum = 0x1234 - chksum;
+ contents[EE_CHKSUM1] = chksum & 0xff;
+ contents[EE_CHKSUM2] = chksum >> 8;
+}
+
+static void dc390_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ k->realize = dc390_scsi_realize;
+ k->config_read = dc390_read_config;
+ k->config_write = dc390_write_config;
+ set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+ dc->desc = "Tekram DC-390 SCSI adapter";
+}
+
+static const TypeInfo dc390_info = {
+ .name = "dc390",
+ .parent = TYPE_AM53C974_DEVICE,
+ .instance_size = sizeof(DC390State),
+ .class_init = dc390_class_init,
+};
+
+static void esp_pci_register_types(void)
+{
+ type_register_static(&esp_pci_info);
+ type_register_static(&dc390_info);
+}
+
+type_init(esp_pci_register_types)
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