#include <palacios/vmm.h>
#include <palacios/vmm_dev_mgr.h>
#include <devices/lnx_virtio_pci.h>
-#include <devices/lnx_virtio_blk.h>
-#include <devices/block_dev.h>
#include <palacios/vm_guest_mem.h>
#include <devices/pci.h>
+
+#ifndef CONFIG_DEBUG_VIRTIO_BLK
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#endif
+
+
#define BLK_CAPACITY_PORT 20
#define BLK_MAX_SIZE_PORT 28
#define BLK_MAX_SEG_PORT 32
#define VIRTIO_LEGACY_GEOM 0x10 /* Indicates support of legacy geometry */
-
+struct virtio_dev_state {
+ struct vm_device * pci_bus;
+ struct list_head dev_list;
+ struct guest_info * vm;
+};
struct virtio_blk_state {
+
+ struct pci_device * pci_dev;
struct blk_config block_cfg;
struct virtio_config virtio_cfg;
- struct vm_device * pci_bus;
- struct pci_device * pci_dev;
struct virtio_queue queue;
- union {
- struct v3_cd_ops * cd_ops;
- struct v3_hd_ops * hd_ops;
- };
+ struct v3_dev_blk_ops * ops;
- v3_block_type_t block_type;
void * backend_data;
int io_range_size;
+
+ struct virtio_dev_state * virtio_dev;
+
+ struct list_head dev_link;
};
return -1;
}
-static int virtio_reset(struct vm_device * dev) {
- struct virtio_blk_state * virtio = (struct virtio_blk_state *)dev->private_data;
+static int blk_reset(struct virtio_blk_state * virtio) {
virtio->queue.ring_desc_addr = 0;
virtio->queue.ring_avail_addr = 0;
virtio->virtio_cfg.status = 0;
virtio->virtio_cfg.pci_isr = 0;
-
return 0;
}
-static int handle_read_op(struct vm_device * dev, uint8_t * buf, uint64_t sector, uint32_t len) {
- struct virtio_blk_state * virtio = (struct virtio_blk_state *)dev->private_data;
-
- if (virtio->block_type == BLOCK_DISK) {
- if (len % HD_SECTOR_SIZE) {
- PrintError("Write of something that is not a sector len %d, mod=%d\n", len, len % HD_SECTOR_SIZE);
- return -1;
- }
-
- PrintDebug("Reading Disk\n");
-
- return virtio->hd_ops->read(buf, len / HD_SECTOR_SIZE, sector * HD_SECTOR_SIZE, virtio->backend_data);
- } else if (virtio->block_type == BLOCK_CDROM) {
- if (len % ATAPI_BLOCK_SIZE) {
- PrintError("Write of something that is not an ATAPI block len %d, mod=%d\n", len, len % ATAPI_BLOCK_SIZE);
- return -1;
- }
-
- return virtio->cd_ops->read(buf, len / ATAPI_BLOCK_SIZE, sector * ATAPI_BLOCK_SIZE, virtio->backend_data);
+static int virtio_reset(struct vm_device * dev) {
+ struct virtio_dev_state * dev_state = (struct virtio_dev_state *)(dev->private_data);
+ struct virtio_blk_state * blk_state = NULL;
+ list_for_each_entry(blk_state, &(dev_state->dev_list), dev_link) {
+ blk_reset(blk_state);
}
- return -1;
+ return 0;
}
+static int handle_read_op(struct virtio_blk_state * blk_state, uint8_t * buf, uint64_t * sector, uint64_t len) {
+ int ret = -1;
-static int handle_write_op(struct vm_device * dev, uint8_t * buf, uint64_t sector, uint32_t len) {
- struct virtio_blk_state * virtio = (struct virtio_blk_state *)dev->private_data;
+ PrintDebug("Reading Disk\n");
+ ret = blk_state->ops->read(buf, *sector, len, (void *)(blk_state->backend_data));
+ *sector += len;
+ return ret;
+}
- if (virtio->block_type == BLOCK_DISK) {
- if (len % HD_SECTOR_SIZE) {
- PrintError("Write of something that is not a sector len %d, mod=%d\n", len, len % HD_SECTOR_SIZE);
- return -1;
- }
- PrintDebug("Writing Disk\n");
+static int handle_write_op(struct virtio_blk_state * blk_state, uint8_t * buf, uint64_t * sector, uint64_t len) {
+ int ret = -1;
- return virtio->hd_ops->write(buf, len / HD_SECTOR_SIZE, sector * HD_SECTOR_SIZE, virtio->backend_data);
- }
+ PrintDebug("Writing Disk\n");
+ ret = blk_state->ops->write(buf, *sector, len, (void *)(blk_state->backend_data));
+ *sector += len;
- return -1;
+ return ret;
}
-static int handle_block_op(struct vm_device * dev, struct vring_desc * hdr_desc,
- struct vring_desc * buf_desc, struct vring_desc * status_desc) {
- struct virtio_blk_state * virtio = (struct virtio_blk_state *)dev->private_data;
- struct blk_op_hdr * hdr = NULL;
- uint8_t * buf = NULL;
- uint8_t * status = NULL;
-
- PrintDebug("Handling Block op\n");
+// multiple block operations need to increment the sector
- if (guest_pa_to_host_va(dev->vm, hdr_desc->addr_gpa, (addr_t *)&(hdr)) == -1) {
- PrintError("Could not translate block header address\n");
- return -1;
- }
+static int handle_block_op(struct virtio_blk_state * blk_state, struct blk_op_hdr * hdr,
+ struct vring_desc * buf_desc, uint8_t * status) {
+ uint8_t * buf = NULL;
- if (guest_pa_to_host_va(dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
+ PrintDebug("Handling Block op\n");
+ if (guest_pa_to_host_va(blk_state->virtio_dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
PrintError("Could not translate buffer address\n");
return -1;
}
- if (guest_pa_to_host_va(dev->vm, status_desc->addr_gpa, (addr_t *)&(status)) == -1) {
- PrintError("Could not translate status address\n");
- return -1;
- }
-
PrintDebug("Sector=%p Length=%d\n", (void *)(addr_t)(hdr->sector), buf_desc->length);
if (hdr->type == BLK_IN_REQ) {
- if (virtio->block_type != BLOCK_NONE) {
- if (handle_read_op(dev, buf, hdr->sector, buf_desc->length) == -1) {
- *status = BLK_STATUS_ERR;
- } else {
- *status = BLK_STATUS_OK;
- }
+ if (handle_read_op(blk_state, buf, &(hdr->sector), buf_desc->length) == -1) {
+ *status = BLK_STATUS_ERR;
+ return -1;
} else {
- *status = BLK_STATUS_NOT_SUPPORTED;
- }
-
+ *status = BLK_STATUS_OK;
+ }
} else if (hdr->type == BLK_OUT_REQ) {
- if (virtio->block_type == BLOCK_DISK) {
- if (handle_write_op(dev, buf, hdr->sector, buf_desc->length) == -1) {
- *status = BLK_STATUS_ERR;
- } else {
- *status = BLK_STATUS_OK;
- }
+ if (handle_write_op(blk_state, buf, &(hdr->sector), buf_desc->length) == -1) {
+ *status = BLK_STATUS_ERR;
+ return -1;
} else {
- *status = BLK_STATUS_NOT_SUPPORTED;
+ *status = BLK_STATUS_OK;
}
} else if (hdr->type == BLK_SCSI_CMD) {
+ PrintError("VIRTIO: SCSI Command Not supported!!!\n");
*status = BLK_STATUS_NOT_SUPPORTED;
+ return -1;
}
PrintDebug("Returning Status: %d\n", *status);
return 0;
}
+static int get_desc_count(struct virtio_queue * q, int index) {
+ struct vring_desc * tmp_desc = &(q->desc[index]);
+ int cnt = 1;
+
+ while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
+ tmp_desc = &(q->desc[tmp_desc->next]);
+ cnt++;
+ }
+
+ return cnt;
+}
+
-static int handle_kick(struct vm_device * dev) {
- struct virtio_blk_state * virtio = (struct virtio_blk_state *)dev->private_data;
- struct virtio_queue * q = &(virtio->queue);
+static int handle_kick(struct virtio_blk_state * blk_state) {
+ struct virtio_queue * q = &(blk_state->queue);
- PrintDebug("VIRTIO KICK: cur_index=%d, avail_index=%d\n", q->cur_avail_idx, q->avail->index);
+ PrintDebug("VIRTIO KICK: cur_index=%d (mod=%d), avail_index=%d\n",
+ q->cur_avail_idx, q->cur_avail_idx % QUEUE_SIZE, q->avail->index);
while (q->cur_avail_idx < q->avail->index) {
struct vring_desc * hdr_desc = NULL;
struct vring_desc * buf_desc = NULL;
struct vring_desc * status_desc = NULL;
- uint16_t chain_idx = q->avail->ring[q->cur_avail_idx];
+ struct blk_op_hdr hdr;
+ addr_t hdr_addr = 0;
+ uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % QUEUE_SIZE];
+ int desc_cnt = get_desc_count(q, desc_idx);
+ int i = 0;
+ uint8_t * status_ptr = NULL;
+ uint8_t status = BLK_STATUS_OK;
uint32_t req_len = 0;
- int chained = 1;
- PrintDebug("chained=%d, Chain Index=%d\n", chained, chain_idx);
+ PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % QUEUE_SIZE);
- while (chained) {
- hdr_desc = &(q->desc[chain_idx]);
-
- PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
- (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
+ if (desc_cnt < 3) {
+ PrintError("Block operations must include at least 3 descriptors\n");
+ return -1;
+ }
+
+ hdr_desc = &(q->desc[desc_idx]);
+
+
+ PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
+ (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
+
+ if (guest_pa_to_host_va(blk_state->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
+ PrintError("Could not translate block header address\n");
+ return -1;
+ }
+
+ // We copy the block op header out because we are going to modify its contents
+ memcpy(&hdr, (void *)hdr_addr, sizeof(struct blk_op_hdr));
- if (!(hdr_desc->flags & VIRTIO_NEXT_FLAG)) {
- PrintError("Block operations must chain a buffer descriptor\n");
- return -1;
- }
+ PrintDebug("Blk Op Hdr (ptr=%p) type=%d, sector=%p\n", (void *)hdr_addr, hdr.type, (void *)hdr.sector);
+
+ desc_idx = hdr_desc->next;
+
+ for (i = 0; i < desc_cnt - 2; i++) {
+ uint8_t tmp_status = BLK_STATUS_OK;
+
+ buf_desc = &(q->desc[desc_idx]);
- buf_desc = &(q->desc[hdr_desc->next]);
-
PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", buf_desc,
(void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next);
-
- if (!(buf_desc->flags & VIRTIO_NEXT_FLAG)) {
- PrintError("Block operatoins must chain a status descriptor\n");
+
+ if (handle_block_op(blk_state, &hdr, buf_desc, &tmp_status) == -1) {
+ PrintError("Error handling block operation\n");
return -1;
}
-
- status_desc = &(q->desc[buf_desc->next]);
- // We detect whether we are chained here...
- if (status_desc->flags & VIRTIO_NEXT_FLAG) {
- chained = 1;
- chain_idx = status_desc->next;
- } else {
- chained = 0;
+ if (tmp_status != BLK_STATUS_OK) {
+ status = tmp_status;
}
- PrintDebug("Status Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", status_desc,
- (void *)(status_desc->addr_gpa), status_desc->length, status_desc->flags, status_desc->next);
-
+ req_len += buf_desc->length;
+ desc_idx = buf_desc->next;
+ }
- if (handle_block_op(dev, hdr_desc, buf_desc, status_desc) == -1) {
- PrintError("Error handling block operation\n");
- return -1;
- }
+ status_desc = &(q->desc[desc_idx]);
- req_len += (buf_desc->length + status_desc->length);
- }
+ PrintDebug("Status Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", status_desc,
+ (void *)(status_desc->addr_gpa), status_desc->length, status_desc->flags, status_desc->next);
- q->used->ring[q->used->index].id = q->avail->ring[q->cur_avail_idx];
- q->used->ring[q->used->index].length = req_len; // What do we set this to????
+ if (guest_pa_to_host_va(blk_state->virtio_dev->vm, status_desc->addr_gpa, (addr_t *)&(status_ptr)) == -1) {
+ PrintError("Could not translate status address\n");
+ return -1;
+ }
- q->used->index = (q->used->index + 1) % (QUEUE_SIZE * sizeof(struct vring_desc));;
+ req_len += status_desc->length;
+ *status_ptr = status;
+ q->used->ring[q->used->index % QUEUE_SIZE].id = q->avail->ring[q->cur_avail_idx % QUEUE_SIZE];
+ q->used->ring[q->used->index % QUEUE_SIZE].length = req_len; // What do we set this to????
- q->cur_avail_idx = (q->cur_avail_idx + 1) % (QUEUE_SIZE * sizeof(struct vring_desc));
+ q->used->index++;
+ q->cur_avail_idx++;
}
if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
- PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
- v3_pci_raise_irq(virtio->pci_bus, 0, virtio->pci_dev);
- virtio->virtio_cfg.pci_isr = 1;
+ PrintDebug("Raising IRQ %d\n", blk_state->pci_dev->config_header.intr_line);
+ v3_pci_raise_irq(blk_state->virtio_dev->pci_bus, 0, blk_state->pci_dev);
+ blk_state->virtio_cfg.pci_isr = 1;
}
return 0;
}
-static int virtio_io_write(uint16_t port, void * src, uint_t length, struct vm_device * dev) {
- struct virtio_blk_state * virtio = (struct virtio_blk_state *)dev->private_data;
- int port_idx = port % virtio->io_range_size;
+static int virtio_io_write(uint16_t port, void * src, uint_t length, void * private_data) {
+ struct virtio_blk_state * blk_state = (struct virtio_blk_state *)private_data;
+ int port_idx = port % blk_state->io_range_size;
PrintDebug("VIRTIO BLOCK Write for port %d (index=%d) len=%d, value=%x\n",
return -1;
}
- virtio->virtio_cfg.guest_features = *(uint32_t *)src;
+ blk_state->virtio_cfg.guest_features = *(uint32_t *)src;
+ PrintDebug("Setting Guest Features to %x\n", blk_state->virtio_cfg.guest_features);
break;
case VRING_PG_NUM_PORT:
addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
- virtio->queue.pfn = pfn;
+ blk_state->queue.pfn = pfn;
- virtio->queue.ring_desc_addr = page_addr ;
- virtio->queue.ring_avail_addr = page_addr + (QUEUE_SIZE * sizeof(struct vring_desc));
- virtio->queue.ring_used_addr = ( virtio->queue.ring_avail_addr + \
+ blk_state->queue.ring_desc_addr = page_addr ;
+ blk_state->queue.ring_avail_addr = page_addr + (QUEUE_SIZE * sizeof(struct vring_desc));
+ blk_state->queue.ring_used_addr = ( blk_state->queue.ring_avail_addr + \
sizeof(struct vring_avail) + \
(QUEUE_SIZE * sizeof(uint16_t)));
// round up to next page boundary.
- virtio->queue.ring_used_addr = (virtio->queue.ring_used_addr + 0xfff) & ~0xfff;
+ blk_state->queue.ring_used_addr = (blk_state->queue.ring_used_addr + 0xfff) & ~0xfff;
- if (guest_pa_to_host_va(dev->vm, virtio->queue.ring_desc_addr, (addr_t *)&(virtio->queue.desc)) == -1) {
+ if (guest_pa_to_host_va(blk_state->virtio_dev->vm, blk_state->queue.ring_desc_addr, (addr_t *)&(blk_state->queue.desc)) == -1) {
PrintError("Could not translate ring descriptor address\n");
return -1;
}
- if (guest_pa_to_host_va(dev->vm, virtio->queue.ring_avail_addr, (addr_t *)&(virtio->queue.avail)) == -1) {
+ if (guest_pa_to_host_va(blk_state->virtio_dev->vm, blk_state->queue.ring_avail_addr, (addr_t *)&(blk_state->queue.avail)) == -1) {
PrintError("Could not translate ring available address\n");
return -1;
}
- if (guest_pa_to_host_va(dev->vm, virtio->queue.ring_used_addr, (addr_t *)&(virtio->queue.used)) == -1) {
+ if (guest_pa_to_host_va(blk_state->virtio_dev->vm, blk_state->queue.ring_used_addr, (addr_t *)&(blk_state->queue.used)) == -1) {
PrintError("Could not translate ring used address\n");
return -1;
}
PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
- (void *)(virtio->queue.ring_desc_addr),
- (void *)(virtio->queue.ring_avail_addr),
- (void *)(virtio->queue.ring_used_addr));
+ (void *)(blk_state->queue.ring_desc_addr),
+ (void *)(blk_state->queue.ring_avail_addr),
+ (void *)(blk_state->queue.ring_used_addr));
PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
- virtio->queue.desc, virtio->queue.avail, virtio->queue.used);
+ blk_state->queue.desc, blk_state->queue.avail, blk_state->queue.used);
} else {
PrintError("Illegal write length for page frame number\n");
}
break;
case VRING_Q_SEL_PORT:
- virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
+ blk_state->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
- if (virtio->virtio_cfg.vring_queue_selector != 0) {
+ if (blk_state->virtio_cfg.vring_queue_selector != 0) {
PrintError("Virtio Block device only uses 1 queue, selected %d\n",
- virtio->virtio_cfg.vring_queue_selector);
+ blk_state->virtio_cfg.vring_queue_selector);
return -1;
}
break;
case VRING_Q_NOTIFY_PORT:
PrintDebug("Handling Kick\n");
- if (handle_kick(dev) == -1) {
+ if (handle_kick(blk_state) == -1) {
PrintError("Could not handle Block Notification\n");
return -1;
}
break;
case VIRTIO_STATUS_PORT:
- virtio->virtio_cfg.status = *(uint8_t *)src;
+ blk_state->virtio_cfg.status = *(uint8_t *)src;
- if (virtio->virtio_cfg.status == 0) {
+ if (blk_state->virtio_cfg.status == 0) {
PrintDebug("Resetting device\n");
- virtio_reset(dev);
+ blk_reset(blk_state);
}
break;
case VIRTIO_ISR_PORT:
- virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
+ blk_state->virtio_cfg.pci_isr = *(uint8_t *)src;
break;
default:
return -1;
}
-static int virtio_io_read(uint16_t port, void * dst, uint_t length, struct vm_device * dev) {
- struct virtio_blk_state * virtio = (struct virtio_blk_state *)dev->private_data;
- int port_idx = port % virtio->io_range_size;
+static int virtio_io_read(uint16_t port, void * dst, uint_t length, void * private_data) {
+ struct virtio_blk_state * blk_state = (struct virtio_blk_state *)private_data;
+ int port_idx = port % blk_state->io_range_size;
PrintDebug("VIRTIO BLOCK Read for port %d (index =%d), length=%d\n",
return -1;
}
- *(uint32_t *)dst = virtio->virtio_cfg.host_features;
+ *(uint32_t *)dst = blk_state->virtio_cfg.host_features;
break;
case VRING_PG_NUM_PORT:
return -1;
}
- *(uint32_t *)dst = virtio->queue.pfn;
+ *(uint32_t *)dst = blk_state->queue.pfn;
break;
case VRING_SIZE_PORT:
return -1;
}
- *(uint16_t *)dst = virtio->queue.queue_size;
+ *(uint16_t *)dst = blk_state->queue.queue_size;
break;
return -1;
}
- *(uint8_t *)dst = virtio->virtio_cfg.status;
+ *(uint8_t *)dst = blk_state->virtio_cfg.status;
break;
case VIRTIO_ISR_PORT:
- *(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
- virtio->virtio_cfg.pci_isr = 0;
- v3_pci_lower_irq(virtio->pci_bus, 0, virtio->pci_dev);
+ *(uint8_t *)dst = blk_state->virtio_cfg.pci_isr;
+ blk_state->virtio_cfg.pci_isr = 0;
+ v3_pci_lower_irq(blk_state->virtio_dev->pci_bus, 0, blk_state->pci_dev);
break;
default:
if ( (port_idx >= sizeof(struct virtio_config)) &&
(port_idx < (sizeof(struct virtio_config) + sizeof(struct blk_config))) ) {
+ int cfg_offset = port_idx - sizeof(struct virtio_config);
+ uint8_t * cfg_ptr = (uint8_t *)&(blk_state->block_cfg);
- uint8_t * cfg_ptr = (uint8_t *)&(virtio->block_cfg);
- memcpy(dst, cfg_ptr, length);
+ memcpy(dst, cfg_ptr + cfg_offset, length);
} else {
PrintError("Read of Unhandled Virtio Read\n");
static struct v3_device_ops dev_ops = {
.free = virtio_free,
- .reset = NULL,
+ .reset = virtio_reset,
.start = NULL,
.stop = NULL,
};
-int v3_virtio_register_cdrom(struct vm_device * dev, struct v3_cd_ops * ops, void * private_data) {
- struct virtio_blk_state * virtio = (struct virtio_blk_state *)dev->private_data;
-
- virtio->block_type = BLOCK_CDROM;
- virtio->cd_ops = ops;
- virtio->backend_data = private_data;
-
- virtio->block_cfg.capacity = ops->get_capacity(private_data);
-
- return 0;
-}
-
-
-int v3_virtio_register_harddisk(struct vm_device * dev, struct v3_hd_ops * ops, void * private_data) {
- struct virtio_blk_state * virtio = (struct virtio_blk_state *)dev->private_data;
-
- virtio->block_type = BLOCK_DISK;
- virtio->hd_ops = ops;
- virtio->backend_data = private_data;
-
- virtio->block_cfg.capacity = ops->get_capacity(private_data);
-
- return 0;
-}
-
-
-static int virtio_init(struct guest_info * vm, void * cfg_data) {
- struct vm_device * pci_bus = v3_find_dev(vm, (char *)cfg_data);
- struct virtio_blk_state * virtio_state = NULL;
+static int register_dev(struct virtio_dev_state * virtio, struct virtio_blk_state * blk_state) {
+ // initialize PCI
struct pci_device * pci_dev = NULL;
+ struct v3_pci_bar bars[6];
+ int num_ports = sizeof(struct virtio_config) + sizeof(struct blk_config);
+ int tmp_ports = num_ports;
+ int i;
- PrintDebug("Initializing VIRTIO Block device\n");
- if (pci_bus == NULL) {
- PrintError("VirtIO devices require a PCI Bus");
- return -1;
- }
+ // This gets the number of ports, rounded up to a power of 2
+ blk_state->io_range_size = 1; // must be a power of 2
- virtio_state = (struct virtio_blk_state *)V3_Malloc(sizeof(struct virtio_blk_state));
- memset(virtio_state, 0, sizeof(struct virtio_blk_state));
-
-
- struct vm_device * dev = v3_allocate_device("LNX_VIRTIO_BLK", &dev_ops, virtio_state);
- if (v3_attach_device(vm, dev) == -1) {
- PrintError("Could not attach device %s\n", "LNX_VIRTIO_BLK");
+ while (tmp_ports > 0) {
+ tmp_ports >>= 1;
+ blk_state->io_range_size <<= 1;
+ }
+
+ // this is to account for any low order bits being set in num_ports
+ // if there are none, then num_ports was already a power of 2 so we shift right to reset it
+ if ((num_ports & ((blk_state->io_range_size >> 1) - 1)) == 0) {
+ blk_state->io_range_size >>= 1;
+ }
+
+
+ for (i = 0; i < 6; i++) {
+ bars[i].type = PCI_BAR_NONE;
+ }
+
+ PrintDebug("Virtio-BLK io_range_size = %d\n", blk_state->io_range_size);
+
+ bars[0].type = PCI_BAR_IO;
+ bars[0].default_base_port = -1;
+ bars[0].num_ports = blk_state->io_range_size;
+
+ bars[0].io_read = virtio_io_read;
+ bars[0].io_write = virtio_io_write;
+ bars[0].private_data = blk_state;
+
+ pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
+ 0, PCI_AUTO_DEV_NUM, 0,
+ "LNX_VIRTIO_BLK", bars,
+ NULL, NULL, NULL, blk_state);
+
+ if (!pci_dev) {
+ PrintError("Could not register PCI Device\n");
return -1;
}
+
+ pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
+ pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
+
+
+ pci_dev->config_header.device_id = VIRTIO_BLOCK_DEV_ID;
+ pci_dev->config_header.class = PCI_CLASS_STORAGE;
+ pci_dev->config_header.subclass = PCI_STORAGE_SUBCLASS_OTHER;
+
+ pci_dev->config_header.subsystem_id = VIRTIO_BLOCK_SUBDEVICE_ID;
+
+
+ pci_dev->config_header.intr_pin = 1;
+
+ pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
+
+
+ blk_state->pci_dev = pci_dev;
+
+ /* Block configuration */
+ blk_state->virtio_cfg.host_features = VIRTIO_SEG_MAX;
+ blk_state->block_cfg.max_seg = QUEUE_SIZE - 2;
+ // Virtio Block only uses one queue
+ blk_state->queue.queue_size = QUEUE_SIZE;
- // PCI initialization
- {
- struct v3_pci_bar bars[6];
- int num_ports = sizeof(struct virtio_config) + sizeof(struct blk_config);
- int tmp_ports = num_ports;
- int i;
+ blk_state->virtio_dev = virtio;
+ blk_reset(blk_state);
- // This gets the number of ports, rounded up to a power of 2
- virtio_state->io_range_size = 1; // must be a power of 2
+ return 0;
+}
- while (tmp_ports > 0) {
- tmp_ports >>= 1;
- virtio_state->io_range_size <<= 1;
- }
-
- // this is to account for any low order bits being set in num_ports
- // if there are none, then num_ports was already a power of 2 so we shift right to reset it
- if ((num_ports & ((virtio_state->io_range_size >> 1) - 1)) == 0) {
- virtio_state->io_range_size >>= 1;
- }
+static int connect_fn(struct guest_info * info,
+ void * frontend_data,
+ struct v3_dev_blk_ops * ops,
+ v3_cfg_tree_t * cfg,
+ void * private_data) {
- for (i = 0; i < 6; i++) {
- bars[i].type = PCI_BAR_NONE;
- }
+ struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data;
- bars[0].type = PCI_BAR_IO;
- bars[0].default_base_port = -1;
- bars[0].num_ports = virtio_state->io_range_size;
+ struct virtio_blk_state * blk_state = (struct virtio_blk_state *)V3_Malloc(sizeof(struct virtio_blk_state));
+ memset(blk_state, 0, sizeof(struct virtio_blk_state));
- bars[0].io_read = virtio_io_read;
- bars[0].io_write = virtio_io_write;
+ register_dev(virtio, blk_state);
- pci_dev = v3_pci_register_device(pci_bus, PCI_STD_DEVICE,
- 0, PCI_AUTO_DEV_NUM, 0,
- "LNX_VIRTIO_BLK", bars,
- NULL, NULL, NULL, dev);
+ blk_state->ops = ops;
+ blk_state->backend_data = private_data;
- if (!pci_dev) {
- PrintError("Could not register PCI Device\n");
- return -1;
- }
-
- pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
- pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
-
+ blk_state->block_cfg.capacity = ops->get_capacity(private_data);
- pci_dev->config_header.device_id = VIRTIO_BLOCK_DEV_ID;
- pci_dev->config_header.class = PCI_CLASS_STORAGE;
- pci_dev->config_header.subclass = PCI_STORAGE_SUBCLASS_OTHER;
-
- pci_dev->config_header.subsystem_id = VIRTIO_BLOCK_SUBDEVICE_ID;
+ PrintDebug("Virtio Capacity = %d -- 0x%p\n", (int)(virtio->block_cfg.capacity),
+ (void *)(addr_t)(virtio->block_cfg.capacity));
+ return 0;
+}
- pci_dev->config_header.intr_pin = 1;
- pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
+static int virtio_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
+ struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
+ struct virtio_dev_state * virtio_state = NULL;
+ char * name = v3_cfg_val(cfg, "name");
+ PrintDebug("Initializing VIRTIO Block device\n");
- virtio_state->pci_dev = pci_dev;
- virtio_state->pci_bus = pci_bus;
+ if (pci_bus == NULL) {
+ PrintError("VirtIO devices require a PCI Bus");
+ return -1;
}
- /* Block configuration */
- virtio_state->virtio_cfg.host_features = VIRTIO_SEG_MAX;
- // Virtio Block only uses one queue
- virtio_state->queue.queue_size = QUEUE_SIZE;
+ virtio_state = (struct virtio_dev_state *)V3_Malloc(sizeof(struct virtio_dev_state));
+ memset(virtio_state, 0, sizeof(struct virtio_dev_state));
- virtio_reset(dev);
+ INIT_LIST_HEAD(&(virtio_state->dev_list));
+ virtio_state->pci_bus = pci_bus;
+ virtio_state->vm = vm;
- virtio_state->backend_data = NULL;
- virtio_state->block_type = BLOCK_NONE;
- virtio_state->hd_ops = NULL;
+ struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
+ if (v3_attach_device(vm, dev) == -1) {
+ PrintError("Could not attach device %s\n", name);
+ return -1;
+ }
+
+ if (v3_dev_add_blk_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
+ PrintError("Could not register %s as block frontend\n", name);
+ return -1;
+ }
return 0;
}
