uint8_t data_buf[DATA_BUFFER_SIZE];
-
uint32_t num_cylinders;
uint32_t num_heads;
uint32_t num_sectors;
}
-
-
+static int dma_read(struct vm_device * dev, struct ide_channel * channel);
+static int dma_write(struct vm_device * dev, struct ide_channel * channel);
/* ATAPI functions */
#include "ata.h"
+#ifdef DEBUG_IDE
+static void print_prd_table(struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_dma_prd prd_entry;
+ int index = 0;
+
+ PrintDebug("Dumping PRD table\n");
+
+ while (1) {
+ uint32_t prd_entry_addr = channel->dma_prd_addr + (sizeof(struct ide_dma_prd) * index);
+ int ret;
+
+ ret = read_guest_pa_memory(dev->vm, prd_entry_addr, sizeof(struct ide_dma_prd), (void *)&prd_entry);
+
+ if (ret != sizeof(struct ide_dma_prd)) {
+ PrintError("Could not read PRD\n");
+ return;
+ }
+
+ PrintDebug("\tPRD Addr: %x, PRD Len: %d, EOT: %d\n",
+ prd_entry.base_addr, prd_entry.size, prd_entry.end_of_table);
+
+ if (prd_entry.end_of_table) {
+ break;
+ }
+
+ index++;
+ }
+
+ return;
+}
+#endif
/* IO Operations */
static int dma_read(struct vm_device * dev, struct ide_channel * channel) {
struct ide_drive * drive = get_selected_drive(channel);
// This is at top level scope to do the EOT test at the end
struct ide_dma_prd prd_entry;
+ uint_t bytes_left = drive->transfer_length;
// Read in the data buffer....
// Read a sector/block at a time until the prd entry is full.
- if (drive->drive_type == IDE_DISK) {
- uint_t bytes_left = drive->transfer_length;
+#ifdef DEBUG_IDE
+ print_prd_table(dev, channel);
+#endif
+
+ PrintDebug("DMA read for %d bytes\n", bytes_left);
- // Loop through the disk data
- while (bytes_left > 0) {
+ // Loop through the disk data
+ while (bytes_left > 0) {
+ uint32_t prd_entry_addr = channel->dma_prd_addr + (sizeof(struct ide_dma_prd) * channel->dma_tbl_index);
+ uint_t prd_bytes_left = 0;
+ uint_t prd_offset = 0;
+ int ret;
- uint32_t prd_entry_addr = channel->dma_prd_addr + (sizeof(struct ide_dma_prd) * channel->dma_tbl_index);
- uint_t prd_bytes_left = 0;
- uint_t prd_offset = 0;
- int ret;
-
- PrintDebug("PRD table address = %x\n", channel->dma_prd_addr);
-
- ret = read_guest_pa_memory(dev->vm, prd_entry_addr, sizeof(struct ide_dma_prd), (void *)&prd_entry);
-
- if (ret != sizeof(struct ide_dma_prd)) {
- PrintError("Could not read PRD\n");
- return -1;
- }
-
- PrintDebug("PRD Addr: %x, PDR Len: %d, EOT: %d\n", prd_entry.base_addr, prd_entry.size, prd_entry.end_of_table);
-
- // loop through the PRD data....
-
- prd_bytes_left = prd_entry.size;
+ PrintDebug("PRD table address = %x\n", channel->dma_prd_addr);
+ ret = read_guest_pa_memory(dev->vm, prd_entry_addr, sizeof(struct ide_dma_prd), (void *)&prd_entry);
+
+ if (ret != sizeof(struct ide_dma_prd)) {
+ PrintError("Could not read PRD\n");
+ return -1;
+ }
+
+ PrintDebug("PRD Addr: %x, PRD Len: %d, EOT: %d\n",
+ prd_entry.base_addr, prd_entry.size, prd_entry.end_of_table);
+
+ // loop through the PRD data....
+
+ prd_bytes_left = prd_entry.size;
- while (prd_bytes_left > 0) {
- uint_t bytes_to_write = (prd_bytes_left > IDE_SECTOR_SIZE) ? IDE_SECTOR_SIZE : prd_bytes_left;
+
+ while (prd_bytes_left > 0) {
+ uint_t bytes_to_write = 0;
+
+ if (drive->drive_type == IDE_DISK) {
+ bytes_to_write = (prd_bytes_left > IDE_SECTOR_SIZE) ? IDE_SECTOR_SIZE : prd_bytes_left;
if (ata_read(dev, channel, drive->data_buf, 1) == -1) {
PrintError("Failed to read next disk sector\n");
return -1;
}
+ } else if (drive->drive_type == IDE_CDROM) {
+ if (atapi_cmd_is_data_op(drive->cd_state.atapi_cmd)) {
+ bytes_to_write = (prd_bytes_left > ATAPI_BLOCK_SIZE) ? ATAPI_BLOCK_SIZE : prd_bytes_left;
- drive->current_lba++;
-
- ret = write_guest_pa_memory(dev->vm, prd_entry.base_addr + prd_offset, bytes_to_write, drive->data_buf);
-
- if (ret != bytes_to_write) {
- PrintError("Failed to copy data into guest memory... (ret=%d)\n", ret);
+ if (atapi_read_chunk(dev, channel) == -1) {
+ PrintError("Failed to read next disk sector\n");
+ return -1;
+ }
+ } else {
+ PrintDebug("DMA of command packet\n");
+ PrintError("How does this work???\n");
return -1;
+ bytes_to_write = (prd_bytes_left > bytes_left) ? bytes_left : prd_bytes_left;
+ prd_bytes_left = bytes_to_write;
}
-
- drive->transfer_index += ret;
- prd_bytes_left -= ret;
- prd_offset += ret;
- bytes_left -= ret;
}
-
- channel->dma_tbl_index++;
- if (drive->transfer_index % IDE_SECTOR_SIZE) {
- PrintError("We currently don't handle sectors that span PRD descriptors\n");
+ PrintDebug("Writing DMA data to guest Memory ptr=%p, len=%d\n",
+ (void *)(addr_t)(prd_entry.base_addr + prd_offset), bytes_to_write);
+
+ drive->current_lba++;
+
+ ret = write_guest_pa_memory(dev->vm, prd_entry.base_addr + prd_offset, bytes_to_write, drive->data_buf);
+
+ if (ret != bytes_to_write) {
+ PrintError("Failed to copy data into guest memory... (ret=%d)\n", ret);
return -1;
}
- if ((prd_entry.end_of_table == 1) && (bytes_left > 0)) {
- PrintError("DMA table not large enough for data transfer...\n");
+ PrintDebug("\t DMA ret=%d, (prd_bytes_left=%d) (bytes_left=%d)\n", ret, prd_bytes_left, bytes_left);
+
+ drive->transfer_index += ret;
+ prd_bytes_left -= ret;
+ prd_offset += ret;
+ bytes_left -= ret;
+ }
+
+ channel->dma_tbl_index++;
+
+ if (drive->drive_type == IDE_DISK) {
+ if (drive->transfer_index % IDE_SECTOR_SIZE) {
+ PrintError("We currently don't handle sectors that span PRD descriptors\n");
return -1;
}
-
+ } else if (drive->drive_type == IDE_CDROM) {
+ if (atapi_cmd_is_data_op(drive->cd_state.atapi_cmd)) {
+ if (drive->transfer_index % ATAPI_BLOCK_SIZE) {
+ PrintError("We currently don't handle ATAPI BLOCKS that span PRD descriptors\n");
+ PrintError("transfer_index=%d, transfer_length=%d\n",
+ drive->transfer_index, drive->transfer_length);
+ return -1;
+ }
+ }
}
- } else if (drive->drive_type == IDE_CDROM) {
- PrintError("CDROM DMA not supported\n");
- return -1;
+
+ if ((prd_entry.end_of_table == 1) && (bytes_left > 0)) {
+ PrintError("DMA table not large enough for data transfer...\n");
+ return -1;
+ }
}
/*
static int dma_write(struct vm_device * dev, struct ide_channel * channel) {
- // unsupported
- PrintError("DMA writes currently not supported\n");
- return -1;
+ struct ide_drive * drive = get_selected_drive(channel);
+ // This is at top level scope to do the EOT test at the end
+ struct ide_dma_prd prd_entry;
+ uint_t bytes_left = drive->transfer_length;
+
+
+ PrintDebug("DMA write from %d bytes\n", bytes_left);
+
+ // Loop through disk data
+ while (bytes_left > 0) {
+ uint32_t prd_entry_addr = channel->dma_prd_addr + (sizeof(struct ide_dma_prd) * channel->dma_tbl_index);
+ uint_t prd_bytes_left = 0;
+ uint_t prd_offset = 0;
+ int ret;
+
+ PrintDebug("PRD Table address = %x\n", channel->dma_prd_addr);
+
+ ret = read_guest_pa_memory(dev->vm, prd_entry_addr, sizeof(struct ide_dma_prd), (void *)&prd_entry);
+
+ if (ret != sizeof(struct ide_dma_prd)) {
+ PrintError("Could not read PRD\n");
+ return -1;
+ }
+
+ PrintDebug("PRD Addr: %x, PRD Len: %d, EOT: %d\n",
+ prd_entry.base_addr, prd_entry.size, prd_entry.end_of_table);
+
+ prd_bytes_left = prd_entry.size;
+
+ while (prd_bytes_left > 0) {
+ uint_t bytes_to_write = 0;
+
+
+ bytes_to_write = (prd_bytes_left > IDE_SECTOR_SIZE) ? IDE_SECTOR_SIZE : prd_bytes_left;
+
+
+ ret = read_guest_pa_memory(dev->vm, prd_entry.base_addr + prd_offset, bytes_to_write, drive->data_buf);
+
+ if (ret != bytes_to_write) {
+ PrintError("Faild to copy data from guest memory... (ret=%d)\n", ret);
+ return -1;
+ }
+
+ PrintDebug("\t DMA ret=%d (prd_bytes_left=%d) (bytes_left=%d)\n", ret, prd_bytes_left, bytes_left);
+
+
+ if (ata_write(dev, channel, drive->data_buf, 1) == -1) {
+ PrintError("Failed to write data to disk\n");
+ return -1;
+ }
+
+ drive->current_lba++;
+
+ drive->transfer_index += ret;
+ prd_bytes_left -= ret;
+ prd_offset += ret;
+ bytes_left -= ret;
+ }
+
+ channel->dma_tbl_index++;
+
+ if (drive->transfer_index % IDE_SECTOR_SIZE) {
+ PrintError("We currently don't handle sectors that span PRD descriptors\n");
+ return -1;
+ }
+
+ if ((prd_entry.end_of_table == 1) && (bytes_left > 0)) {
+ PrintError("DMA table not large enough for data transfer...\n");
+ return -1;
+ }
+ }
+
+ if (prd_entry.end_of_table) {
+ channel->status.busy = 0;
+ channel->status.ready = 1;
+ channel->status.data_req = 0;
+ channel->status.error = 0;
+ channel->status.seek_complete = 1;
+
+ channel->dma_status.active = 0;
+ channel->dma_status.err = 0;
+ }
+
+ ide_raise_irq(dev, channel);
+
+ return 0;
}
}
break;
}
+
+ case 0xca: { // Write DMA
+ uint32_t sect_cnt = (drive->sector_count == 0) ? 256 : drive->sector_count;
+
+ if (ata_get_lba(dev, channel, &(drive->current_lba)) == -1) {
+ ide_abort_command(dev, channel);
+ return 0;
+ }
+
+ drive->hd_state.cur_sector_num = 1;
+
+ drive->transfer_length = sect_cnt * IDE_SECTOR_SIZE;
+ drive->transfer_index = 0;
+
+ if (channel->dma_status.active == 1) {
+ // DMA Write
+ if (dma_write(dev, channel) == -1) {
+ PrintError("Failed DMA Write\n");
+ return -1;
+ }
+ }
+ break;
+ }
+ case 0xe0: // Standby Now 1
+ case 0xe1: // Set Idle Immediate
+ case 0xe2: // Standby
+ case 0xe3: // Set Idle 1
+ case 0xe6: // Sleep Now 1
+ case 0x94: // Standby Now 2
+ case 0x95: // Idle Immediate (CFA)
+ case 0x96: // Standby 2
+ case 0x97: // Set idle 2
+ case 0x99: // Sleep Now 2
+ channel->status.val = 0;
+ channel->status.ready = 1;
+ ide_raise_irq(dev, channel);
+ break;
+
case 0xef: // Set Features
// Prior to this the features register has been written to.
// This command tells the drive to check if the new value is supported (the value is drive specific)
return -1;
}
-
-
+
if ((data_offset == 0) && (drive->transfer_index > 0)) {
if (atapi_update_data_buf(dev, channel) == -1) {
PrintError("Could not update CDROM data buffer\n");
return -1;
}
+ PrintDebug("Connecting to IDE IO ports\n");
v3_dev_hook_io(dev, PRI_DATA_PORT,
&ide_read_data_port, &write_data_port);
struct pci_device * pci_dev = NULL;
int i;
+ PrintDebug("Connecting IDE to PCI bus\n");
+
for (i = 0; i < 6; i++) {
bars[i].type = PCI_BAR_NONE;
}
}
+ PrintDebug("IDE Initialized\n");
+
return 0;
}
struct vm_device * v3_create_ide(struct vm_device * pci_bus, struct vm_device * southbridge_dev) {
struct ide_internal * ide = (struct ide_internal *)V3_Malloc(sizeof(struct ide_internal));
+
+ memset(ide, 0, sizeof(struct ide_internal));
+
struct vm_device * device = v3_create_device("IDE", &dev_ops, ide);
- ide->pci_bus = pci_bus;
- ide->southbridge = (struct v3_southbridge *)(southbridge_dev->private_data);
+ if (pci_bus != NULL) {
+ if (southbridge_dev == NULL) {
+ PrintError("PCI Enabled BUT southbridge is NULL\n");
+ return NULL;
+ }
+
+ ide->pci_bus = pci_bus;
+ ide->southbridge = (struct v3_southbridge *)(southbridge_dev->private_data);
+ }
+
PrintDebug("IDE: Creating IDE bus x 2\n");
/* this is something of a hack... */
drive->num_sectors = 63;
drive->num_heads = 16;
- drive->num_cylinders = (ops->get_capacity(private_data) / 512) / (drive->num_sectors * drive->num_heads);
+ drive->num_cylinders = ops->get_capacity(private_data) / (drive->num_sectors * drive->num_heads);
if (ide->ide_pci) {
// Hardcode this for now, but its not a good idea....
