}
-
+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;
- // Loop through the disk data
- while (bytes_left > 0) {
+ PrintDebug("DMA read for %d bytes\n", bytes_left);
- 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 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;
- // loop through the PRD data....
+ 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;
+
+
+ while (prd_bytes_left > 0) {
+ uint_t bytes_to_write = 0;
- 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;
-
-
+ 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;
}
-
- drive->current_lba++;
-
- ret = write_guest_pa_memory(dev->vm, prd_entry.base_addr + prd_offset, bytes_to_write, drive->data_buf);
+ } else if (drive->drive_type == IDE_CDROM) {
+ bytes_to_write = (prd_bytes_left > ATAPI_BLOCK_SIZE) ? ATAPI_BLOCK_SIZE : prd_bytes_left;
- 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;
}
-
- drive->transfer_index += ret;
- prd_bytes_left -= ret;
- prd_offset += ret;
- bytes_left -= ret;
}
- channel->dma_tbl_index++;
+ 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;
+ }
+
+ 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;
}
-
- if ((prd_entry.end_of_table == 1) && (bytes_left > 0)) {
- PrintError("DMA table not large enough for data transfer...\n");
+ } else if (drive->drive_type == IDE_CDROM) {
+ if (drive->transfer_index % ATAPI_BLOCK_SIZE) {
+ PrintError("We currently don't handle ATAPI BLOCKS that span PRD descriptors\n");
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;
+ }
+
}
/*
}
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;
}
+ {
+ static uint32_t read_cnt = 0;
+
+ if ((read_cnt % 200) == 0) {
+ PrintError("CD data port read %d\n", read_cnt);
+ }
+
+ read_cnt++;
+ }
if ((data_offset == 0) && (drive->transfer_index > 0)) {
