| /* |
| * libqos virtio PCI driver |
| * |
| * Copyright (c) 2014 Marc MarĂ |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| * See the COPYING file in the top-level directory. |
| */ |
| |
| #include <glib.h> |
| #include <stdio.h> |
| #include "libqtest.h" |
| #include "libqos/virtio.h" |
| #include "libqos/virtio-pci.h" |
| #include "libqos/pci.h" |
| #include "libqos/pci-pc.h" |
| #include "libqos/malloc.h" |
| #include "libqos/malloc-pc.h" |
| |
| #include "hw/pci/pci_regs.h" |
| |
| typedef struct QVirtioPCIForeachData { |
| void (*func)(QVirtioDevice *d, void *data); |
| uint16_t device_type; |
| void *user_data; |
| } QVirtioPCIForeachData; |
| |
| static QVirtioPCIDevice *qpcidevice_to_qvirtiodevice(QPCIDevice *pdev) |
| { |
| QVirtioPCIDevice *vpcidev; |
| vpcidev = g_malloc0(sizeof(*vpcidev)); |
| |
| if (pdev) { |
| vpcidev->pdev = pdev; |
| vpcidev->vdev.device_type = |
| qpci_config_readw(vpcidev->pdev, PCI_SUBSYSTEM_ID); |
| } |
| |
| return vpcidev; |
| } |
| |
| static void qvirtio_pci_foreach_callback( |
| QPCIDevice *dev, int devfn, void *data) |
| { |
| QVirtioPCIForeachData *d = data; |
| QVirtioPCIDevice *vpcidev = qpcidevice_to_qvirtiodevice(dev); |
| |
| if (vpcidev->vdev.device_type == d->device_type) { |
| d->func(&vpcidev->vdev, d->user_data); |
| } else { |
| g_free(vpcidev); |
| } |
| } |
| |
| static void qvirtio_pci_assign_device(QVirtioDevice *d, void *data) |
| { |
| QVirtioPCIDevice **vpcidev = data; |
| *vpcidev = (QVirtioPCIDevice *)d; |
| } |
| |
| static uint8_t qvirtio_pci_config_readb(QVirtioDevice *d, void *addr) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| return qpci_io_readb(dev->pdev, addr); |
| } |
| |
| static uint16_t qvirtio_pci_config_readw(QVirtioDevice *d, void *addr) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| return qpci_io_readw(dev->pdev, addr); |
| } |
| |
| static uint32_t qvirtio_pci_config_readl(QVirtioDevice *d, void *addr) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| return qpci_io_readl(dev->pdev, addr); |
| } |
| |
| static uint64_t qvirtio_pci_config_readq(QVirtioDevice *d, void *addr) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| int i; |
| uint64_t u64 = 0; |
| |
| if (qtest_big_endian()) { |
| for (i = 0; i < 8; ++i) { |
| u64 |= (uint64_t)qpci_io_readb(dev->pdev, addr + i) << (7 - i) * 8; |
| } |
| } else { |
| for (i = 0; i < 8; ++i) { |
| u64 |= (uint64_t)qpci_io_readb(dev->pdev, addr + i) << i * 8; |
| } |
| } |
| |
| return u64; |
| } |
| |
| static uint32_t qvirtio_pci_get_features(QVirtioDevice *d) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| return qpci_io_readl(dev->pdev, dev->addr + QVIRTIO_DEVICE_FEATURES); |
| } |
| |
| static void qvirtio_pci_set_features(QVirtioDevice *d, uint32_t features) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| qpci_io_writel(dev->pdev, dev->addr + QVIRTIO_GUEST_FEATURES, features); |
| } |
| |
| static uint8_t qvirtio_pci_get_status(QVirtioDevice *d) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| return qpci_io_readb(dev->pdev, dev->addr + QVIRTIO_DEVICE_STATUS); |
| } |
| |
| static void qvirtio_pci_set_status(QVirtioDevice *d, uint8_t status) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| qpci_io_writeb(dev->pdev, dev->addr + QVIRTIO_DEVICE_STATUS, status); |
| } |
| |
| static uint8_t qvirtio_pci_get_isr_status(QVirtioDevice *d) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| return qpci_io_readb(dev->pdev, dev->addr + QVIRTIO_ISR_STATUS); |
| } |
| |
| static void qvirtio_pci_queue_select(QVirtioDevice *d, uint16_t index) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| qpci_io_writeb(dev->pdev, dev->addr + QVIRTIO_QUEUE_SELECT, index); |
| } |
| |
| static uint16_t qvirtio_pci_get_queue_size(QVirtioDevice *d) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| return qpci_io_readw(dev->pdev, dev->addr + QVIRTIO_QUEUE_SIZE); |
| } |
| |
| static void qvirtio_pci_set_queue_address(QVirtioDevice *d, uint32_t pfn) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| qpci_io_writel(dev->pdev, dev->addr + QVIRTIO_QUEUE_ADDRESS, pfn); |
| } |
| |
| static QVirtQueue *qvirtio_pci_virtqueue_setup(QVirtioDevice *d, |
| QGuestAllocator *alloc, uint16_t index) |
| { |
| uint64_t addr; |
| QVirtQueue *vq; |
| |
| vq = g_malloc0(sizeof(*vq)); |
| |
| qvirtio_pci_queue_select(d, index); |
| vq->index = index; |
| vq->size = qvirtio_pci_get_queue_size(d); |
| vq->free_head = 0; |
| vq->num_free = vq->size; |
| vq->align = QVIRTIO_PCI_ALIGN; |
| |
| /* Check different than 0 */ |
| g_assert_cmpint(vq->size, !=, 0); |
| |
| /* Check power of 2 */ |
| g_assert_cmpint(vq->size & (vq->size - 1), ==, 0); |
| |
| addr = guest_alloc(alloc, qvring_size(vq->size, QVIRTIO_PCI_ALIGN)); |
| qvring_init(alloc, vq, addr); |
| qvirtio_pci_set_queue_address(d, vq->desc / QVIRTIO_PCI_ALIGN); |
| |
| /* TODO: MSI-X configuration */ |
| |
| return vq; |
| } |
| |
| static void qvirtio_pci_virtqueue_kick(QVirtioDevice *d, QVirtQueue *vq) |
| { |
| QVirtioPCIDevice *dev = (QVirtioPCIDevice *)d; |
| qpci_io_writew(dev->pdev, dev->addr + QVIRTIO_QUEUE_NOTIFY, vq->index); |
| } |
| |
| const QVirtioBus qvirtio_pci = { |
| .config_readb = qvirtio_pci_config_readb, |
| .config_readw = qvirtio_pci_config_readw, |
| .config_readl = qvirtio_pci_config_readl, |
| .config_readq = qvirtio_pci_config_readq, |
| .get_features = qvirtio_pci_get_features, |
| .set_features = qvirtio_pci_set_features, |
| .get_status = qvirtio_pci_get_status, |
| .set_status = qvirtio_pci_set_status, |
| .get_isr_status = qvirtio_pci_get_isr_status, |
| .queue_select = qvirtio_pci_queue_select, |
| .get_queue_size = qvirtio_pci_get_queue_size, |
| .set_queue_address = qvirtio_pci_set_queue_address, |
| .virtqueue_setup = qvirtio_pci_virtqueue_setup, |
| .virtqueue_kick = qvirtio_pci_virtqueue_kick, |
| }; |
| |
| void qvirtio_pci_foreach(QPCIBus *bus, uint16_t device_type, |
| void (*func)(QVirtioDevice *d, void *data), void *data) |
| { |
| QVirtioPCIForeachData d = { .func = func, |
| .device_type = device_type, |
| .user_data = data }; |
| |
| qpci_device_foreach(bus, QVIRTIO_VENDOR_ID, -1, |
| qvirtio_pci_foreach_callback, &d); |
| } |
| |
| QVirtioPCIDevice *qvirtio_pci_device_find(QPCIBus *bus, uint16_t device_type) |
| { |
| QVirtioPCIDevice *dev = NULL; |
| qvirtio_pci_foreach(bus, device_type, qvirtio_pci_assign_device, &dev); |
| |
| return dev; |
| } |
| |
| void qvirtio_pci_device_enable(QVirtioPCIDevice *d) |
| { |
| qpci_device_enable(d->pdev); |
| d->addr = qpci_iomap(d->pdev, 0, NULL); |
| g_assert(d->addr != NULL); |
| } |
| |
| void qvirtio_pci_device_disable(QVirtioPCIDevice *d) |
| { |
| qpci_iounmap(d->pdev, d->addr); |
| } |