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[Qemu-devel] [PATCH v4 08/11] libqos: Added indirect descriptor support
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From: |
Marc Marí |
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Subject: |
[Qemu-devel] [PATCH v4 08/11] libqos: Added indirect descriptor support to virtio implementation |
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Date: |
Tue, 12 Aug 2014 13:41:53 +0200 |
Add functions necessary for working with indirect descriptors.
Add test using new functions.
Signed-off-by: Marc Marí <address@hidden>
---
tests/libqos/virtio-pci.c | 10 ++++
tests/libqos/virtio.c | 63 ++++++++++++++++++++++++
tests/libqos/virtio.h | 22 ++++++++-
tests/virtio-blk-test.c | 118 +++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 212 insertions(+), 1 deletion(-)
diff --git a/tests/libqos/virtio-pci.c b/tests/libqos/virtio-pci.c
index 5f92df7..184c430 100644
--- a/tests/libqos/virtio-pci.c
+++ b/tests/libqos/virtio-pci.c
@@ -93,6 +93,12 @@ static void qvirtio_pci_set_features(QVirtioDevice *d,
uint32_t features)
qpci_io_writel(dev->pdev, dev->addr + QVIRTIO_GUEST_FEATURES, features);
}
+static uint32_t qvirtio_pci_get_guest_features(QVirtioDevice *d)
+{
+ QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
+ return qpci_io_readl(dev->pdev, dev->addr + QVIRTIO_GUEST_FEATURES);
+}
+
static uint8_t qvirtio_pci_get_status(QVirtioDevice *d)
{
QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d;
@@ -133,10 +139,12 @@ static QVirtQueue
*qvirtio_pci_virtqueue_setup(QVirtioDevice *d,
QGuestAllocator *alloc, uint16_t index)
{
uint16_t aux;
+ uint32_t feat;
uint64_t addr;
QVirtQueue *vq;
vq = g_malloc0(sizeof(*vq));
+ feat = qvirtio_pci_get_guest_features(d);
qvirtio_pci_queue_select(d, index);
vq->index = index;
@@ -144,6 +152,7 @@ static QVirtQueue
*qvirtio_pci_virtqueue_setup(QVirtioDevice *d,
vq->free_head = 0;
vq->num_free = vq->size;
vq->align = QVIRTIO_PCI_ALIGN;
+ vq->indirect = (feat & QVIRTIO_F_RING_INDIRECT_DESC) != 0 ? true : false;
/* Check different than 0 */
g_assert_cmpint(vq->size, !=, 0);
@@ -177,6 +186,7 @@ const QVirtioBus qvirtio_pci = {
.config_readq = qvirtio_pci_config_readq,
.get_features = qvirtio_pci_get_features,
.set_features = qvirtio_pci_set_features,
+ .get_guest_features = qvirtio_pci_get_guest_features,
.get_status = qvirtio_pci_get_status,
.set_status = qvirtio_pci_set_status,
.get_isr_status = qvirtio_pci_get_isr_status,
diff --git a/tests/libqos/virtio.c b/tests/libqos/virtio.c
index 762bc4c..6310c48 100644
--- a/tests/libqos/virtio.c
+++ b/tests/libqos/virtio.c
@@ -116,6 +116,51 @@ void qvring_init(const QGuestAllocator *alloc, QVirtQueue
*vq, uint64_t addr)
writew(vq->used, 0);
}
+QVRingIndirectDesc *qvring_indirect_desc_setup(QVirtioDevice *d,
+ QGuestAllocator *alloc, uint16_t elem)
+{
+ int i;
+ QVRingIndirectDesc *indirect = g_malloc(sizeof(*indirect));
+
+ indirect->index = 0;
+ indirect->elem = elem;
+ indirect->desc = guest_alloc(alloc, sizeof(QVRingDesc)*elem);
+
+ for (i = 0; i < elem-1; ++i) {
+ /* indirect->desc[i].addr */
+ writeq(indirect->desc+(16*i), 0);
+ /* indirect->desc[i].flags */
+ writew(indirect->desc+(16*i)+12, QVRING_DESC_F_NEXT);
+ /* indirect->desc[i].next */
+ writew(indirect->desc+(16*i)+14, i+1);
+ }
+
+ return indirect;
+}
+
+void qvring_indirect_desc_add(QVRingIndirectDesc *indirect, uint64_t data,
+ uint32_t len, bool write)
+{
+ uint16_t flags;
+
+ g_assert_cmpint(indirect->index, <, indirect->elem);
+
+ flags = readw(indirect->desc+(16*indirect->index)+12);
+
+ if (write) {
+ flags |= QVRING_DESC_F_WRITE;
+ }
+
+ /* indirect->desc[indirect->index].addr */
+ writeq(indirect->desc+(16*indirect->index), data);
+ /* indirect->desc[indirect->index].len */
+ writel(indirect->desc+(16*indirect->index)+8, len);
+ /* indirect->desc[indirect->index].flags */
+ writew(indirect->desc+(16*indirect->index)+12, flags);
+
+ indirect->index++;
+}
+
uint32_t qvirtqueue_add(QVirtQueue *vq, uint64_t data, uint32_t len, bool
write,
bool next)
{
@@ -140,6 +185,24 @@ uint32_t qvirtqueue_add(QVirtQueue *vq, uint64_t data,
uint32_t len, bool write,
return vq->free_head++; /* Return and increase, in this order */
}
+uint32_t qvirtqueue_add_indirect(QVirtQueue *vq, QVRingIndirectDesc *indirect)
+{
+ g_assert(vq->indirect);
+ g_assert_cmpint(vq->size, >=, indirect->elem);
+ g_assert_cmpint(indirect->index, ==, indirect->elem);
+
+ vq->num_free--;
+
+ /* vq->desc[vq->free_head].addr */
+ writeq(vq->desc+(16*vq->free_head), indirect->desc);
+ /* vq->desc[vq->free_head].len */
+ writel(vq->desc+(16*vq->free_head)+8, sizeof(QVRingDesc)*indirect->elem);
+ /* vq->desc[vq->free_head].flags */
+ writew(vq->desc+(16*vq->free_head)+12, QVRING_DESC_F_INDIRECT);
+
+ return vq->free_head++; /* Return and increase, in this order */
+}
+
void qvirtqueue_kick(const QVirtioBus *bus, QVirtioDevice *d, QVirtQueue *vq,
uint32_t free_head)
{
diff --git a/tests/libqos/virtio.h b/tests/libqos/virtio.h
index 7a38910..d0c84a6 100644
--- a/tests/libqos/virtio.h
+++ b/tests/libqos/virtio.h
@@ -22,6 +22,11 @@
#define QVIRTIO_NET_DEVICE_ID 0x1
#define QVIRTIO_BLK_DEVICE_ID 0x2
+#define QVIRTIO_F_NOTIFY_ON_EMPTY 0x01000000
+#define QVIRTIO_F_ANY_LAYOUT 0x08000000
+#define QVIRTIO_F_RING_INDIRECT_DESC 0x10000000
+#define QVIRTIO_F_RING_EVENT_IDX 0x20000000
+
#define QVRING_DESC_F_NEXT 0x1
#define QVRING_DESC_F_WRITE 0x2
#define QVRING_DESC_F_INDIRECT 0x4
@@ -74,8 +79,15 @@ typedef struct QVirtQueue {
uint32_t free_head;
uint32_t num_free;
uint32_t align;
+ bool indirect;
} QVirtQueue;
+typedef struct QVRingIndirectDesc {
+ uint64_t desc; /* This points to an array fo QVRingDesc */
+ uint16_t index;
+ uint16_t elem;
+} QVRingIndirectDesc;
+
typedef struct QVirtioBus {
uint8_t (*config_readb)(QVirtioDevice *d, void *addr);
uint16_t (*config_readw)(QVirtioDevice *d, void *addr);
@@ -85,9 +97,12 @@ typedef struct QVirtioBus {
/* Get features of the device */
uint32_t (*get_features)(QVirtioDevice *d);
- /* Get features of the device */
+ /* Set features of the device */
void (*set_features)(QVirtioDevice *d, uint32_t features);
+ /* Get features of the guest */
+ uint32_t (*get_guest_features)(QVirtioDevice *d);
+
/* Get status of the device */
uint8_t (*get_status)(QVirtioDevice *d);
@@ -144,8 +159,13 @@ QVirtQueue *qvirtio_virtqueue_setup(const QVirtioBus *bus,
QVirtioDevice *d,
QGuestAllocator *alloc, uint16_t
index);
void qvring_init(const QGuestAllocator *alloc, QVirtQueue *vq, uint64_t addr);
+QVRingIndirectDesc *qvring_indirect_desc_setup(QVirtioDevice *d,
+ QGuestAllocator *alloc, uint16_t elem);
+void qvring_indirect_desc_add(QVRingIndirectDesc *indirect, uint64_t data,
+ uint32_t len, bool write);
uint32_t qvirtqueue_add(QVirtQueue *vq, uint64_t data, uint32_t len, bool
write,
bool next);
+uint32_t qvirtqueue_add_indirect(QVirtQueue *vq, QVRingIndirectDesc *indirect);
void qvirtqueue_kick(const QVirtioBus *bus, QVirtioDevice *d, QVirtQueue *vq,
uint32_t
free_head);
diff --git a/tests/virtio-blk-test.c b/tests/virtio-blk-test.c
index 4f72144..06a9ac8 100644
--- a/tests/virtio-blk-test.c
+++ b/tests/virtio-blk-test.c
@@ -225,6 +225,123 @@ static void pci_basic(void)
test_end();
}
+static void pci_indirect(void)
+{
+ QVirtioPCIDevice *dev;
+ QPCIBus *bus;
+ QVirtQueue *vq;
+ QGuestAllocator *alloc;
+ QVRingIndirectDesc *indirect;
+ void *addr;
+ uint64_t w_req;
+ uint64_t r_req;
+ uint64_t capacity;
+ uint32_t features;
+ uint32_t free_head;
+ uint8_t status;
+ char *data;
+
+ bus = test_start();
+
+ dev = qvirtio_pci_device_find(bus, QVIRTIO_BLK_DEVICE_ID);
+ g_assert(dev != NULL);
+ g_assert_cmphex(dev->vdev.device_type, ==, QVIRTIO_BLK_DEVICE_ID);
+ g_assert_cmphex(dev->pdev->devfn, ==, ((PCI_SLOT << 3) | PCI_FN));
+
+ qvirtio_pci_device_enable(dev);
+ qvirtio_reset(&qvirtio_pci, &dev->vdev);
+ qvirtio_set_acknowledge(&qvirtio_pci, &dev->vdev);
+ qvirtio_set_driver(&qvirtio_pci, &dev->vdev);
+
+ /* MSI-X is not enabled */
+ addr = dev->addr + QVIRTIO_DEVICE_SPECIFIC_NO_MSIX;
+
+ capacity = qvirtio_config_readq(&qvirtio_pci, &dev->vdev, addr);
+ g_assert_cmpint(capacity, ==, TEST_IMAGE_SIZE/512);
+
+ features = qvirtio_get_features(&qvirtio_pci, &dev->vdev);
+ g_assert_cmphex(features & QVIRTIO_F_RING_INDIRECT_DESC, !=, 0);
+ features = features & ~(QVIRTIO_F_BAD_FEATURE | QVIRTIO_F_RING_EVENT_IDX |
+
QVIRTIO_BLK_F_SCSI);
+ qvirtio_set_features(&qvirtio_pci, &dev->vdev, features);
+
+ alloc = pc_alloc_init();
+ vq = qvirtio_virtqueue_setup(&qvirtio_pci, &dev->vdev, alloc, 0);
+
+ qvirtio_set_driver_ok(&qvirtio_pci, &dev->vdev);
+
+ /* Write and read with 2 descriptor layout */
+ data = g_malloc0(512);
+ strcpy(data, "TEST");
+
+ /* Write request */
+ w_req = guest_alloc(alloc, sizeof(QVirtioBlkReq)+512);
+ /* w_req->type */
+ writel(w_req, QVIRTIO_BLK_T_OUT);
+ /* w_req->ioprio */
+ writel(w_req+4, 1);
+ /* w_req->sector */
+ writeq(w_req+8, 0);
+ /* w_req->data */
+ memwrite(w_req+16, data, 512);
+ /* w_req->status */
+ writeb(w_req+528, 0xFF);
+
+ g_free(data);
+
+ indirect = qvring_indirect_desc_setup(&dev->vdev, alloc, 2);
+ qvring_indirect_desc_add(indirect, w_req, 528, 0);
+ qvring_indirect_desc_add(indirect, w_req+528, 1, 1);
+ free_head = qvirtqueue_add_indirect(vq, indirect);
+ qvirtqueue_kick(&qvirtio_pci, &dev->vdev, vq, free_head);
+
+ g_assert(qvirtio_wait_isr(&qvirtio_pci, &dev->vdev, 0x1,
+ QVIRTIO_BLK_TIMEOUT));
+ status = readb(w_req+528);
+ g_assert_cmpint(status, ==, 0);
+
+ g_free(indirect);
+
+ /* Read request */
+ r_req = guest_alloc(alloc, sizeof(QVirtioBlkReq)+512);
+ /* r_req->type */
+ writel(r_req, QVIRTIO_BLK_T_IN);
+ /* r_req->ioprio */
+ writel(r_req+4, 1);
+ /* r_req->sector */
+ writeq(r_req+8, 0);
+ /* r_req->status */
+ writeb(r_req+528, 0xFF);
+
+ indirect = qvring_indirect_desc_setup(&dev->vdev, alloc, 2);
+ qvring_indirect_desc_add(indirect, r_req, 16, false);
+ qvring_indirect_desc_add(indirect, r_req+16, 513, true);
+ free_head = qvirtqueue_add_indirect(vq, indirect);
+ qvirtqueue_kick(&qvirtio_pci, &dev->vdev, vq, free_head);
+
+ g_assert(qvirtio_wait_isr(&qvirtio_pci, &dev->vdev, 0x1,
+ QVIRTIO_BLK_TIMEOUT));
+ status = readb(r_req+528);
+ g_assert_cmpint(status, ==, 0);
+
+ g_free(indirect);
+
+ data = g_malloc0(512);
+ memread(r_req+16, data, 512);
+ g_assert_cmpstr(data, ==, "TEST");
+ g_free(data);
+ g_free(indirect);
+
+ guest_free(alloc, w_req);
+ guest_free(alloc, r_req);
+
+ /* End test */
+ guest_free(alloc, vq->desc);
+ qvirtio_pci_device_disable(dev);
+ g_free(dev);
+ test_end();
+}
+
int main(int argc, char **argv)
{
int ret;
@@ -232,6 +349,7 @@ int main(int argc, char **argv)
g_test_init(&argc, &argv, NULL);
g_test_add_func("/virtio/blk/pci/basic", pci_basic);
+ g_test_add_func("/virtio/blk/pci/indirect", pci_indirect);
ret = g_test_run();
--
1.7.10.4