uint8_t data_buf[DATA_BUFFER_SIZE];
-
uint32_t num_cylinders;
uint32_t num_heads;
uint32_t num_sectors;
#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) {
// Read in the data buffer....
// Read a sector/block at a time until the prd entry is full.
+#ifdef DEBUG_IDE
+ print_prd_table(dev, channel);
+#endif
PrintDebug("DMA read for %d bytes\n", bytes_left);
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);
-
+
// loop through the PRD data....
-
+
prd_bytes_left = prd_entry.size;
-
-
+
+
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) {
- bytes_to_write = (prd_bytes_left > ATAPI_BLOCK_SIZE) ? ATAPI_BLOCK_SIZE : prd_bytes_left;
-
- if (atapi_read_chunk(dev, channel) == -1) {
- PrintError("Failed to read next disk sector\n");
+ 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;
+
+ 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;
}
}
-
+
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++;
-
+
+ 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 (drive->transfer_index % ATAPI_BLOCK_SIZE) {
- PrintError("We currently don't handle ATAPI BLOCKS that span PRD descriptors\n");
- return -1;
+ 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;
+ }
}
}
-
-
+
+
if ((prd_entry.end_of_table == 1) && (bytes_left > 0)) {
PrintError("DMA table not large enough for data transfer...\n");
return -1;