diff options
author | Don Dugger <n0ano@n0ano.com> | 2016-06-03 03:33:22 +0000 |
---|---|---|
committer | Gerrit Code Review <gerrit@172.30.200.206> | 2016-06-03 03:33:23 +0000 |
commit | da27230f80795d0028333713f036d44c53cb0e68 (patch) | |
tree | b3d379eaf000adf72b36cb01cdf4d79c3e3f064c /qemu/roms/seabios/src/hw/virtio-pci.c | |
parent | 0e68cb048bb8aadb14675f5d4286d8ab2fc35449 (diff) | |
parent | 437fd90c0250dee670290f9b714253671a990160 (diff) |
Merge "These changes are the raw update to qemu-2.6."
Diffstat (limited to 'qemu/roms/seabios/src/hw/virtio-pci.c')
-rw-r--r-- | qemu/roms/seabios/src/hw/virtio-pci.c | 228 |
1 files changed, 205 insertions, 23 deletions
diff --git a/qemu/roms/seabios/src/hw/virtio-pci.c b/qemu/roms/seabios/src/hw/virtio-pci.c index b9b3ab1e3..6df519489 100644 --- a/qemu/roms/seabios/src/hw/virtio-pci.c +++ b/qemu/roms/seabios/src/hw/virtio-pci.c @@ -24,47 +24,153 @@ #include "virtio-pci.h" #include "virtio-ring.h" -int vp_find_vq(unsigned int ioaddr, int queue_index, +u64 vp_get_features(struct vp_device *vp) +{ + u32 f0, f1; + + if (vp->use_modern) { + vp_write(&vp->common, virtio_pci_common_cfg, device_feature_select, 0); + f0 = vp_read(&vp->common, virtio_pci_common_cfg, device_feature); + vp_write(&vp->common, virtio_pci_common_cfg, device_feature_select, 1); + f1 = vp_read(&vp->common, virtio_pci_common_cfg, device_feature); + } else { + f0 = vp_read(&vp->legacy, virtio_pci_legacy, host_features); + f1 = 0; + } + return ((u64)f1 << 32) | f0; +} + +void vp_set_features(struct vp_device *vp, u64 features) +{ + u32 f0, f1; + + f0 = features; + f1 = features >> 32; + + if (vp->use_modern) { + vp_write(&vp->common, virtio_pci_common_cfg, guest_feature_select, 0); + vp_write(&vp->common, virtio_pci_common_cfg, guest_feature, f0); + vp_write(&vp->common, virtio_pci_common_cfg, guest_feature_select, 1); + vp_write(&vp->common, virtio_pci_common_cfg, guest_feature, f1); + } else { + vp_write(&vp->legacy, virtio_pci_legacy, guest_features, f0); + } +} + +u8 vp_get_status(struct vp_device *vp) +{ + if (vp->use_modern) { + return vp_read(&vp->common, virtio_pci_common_cfg, device_status); + } else { + return vp_read(&vp->legacy, virtio_pci_legacy, status); + } +} + +void vp_set_status(struct vp_device *vp, u8 status) +{ + if (status == 0) /* reset */ + return; + if (vp->use_modern) { + vp_write(&vp->common, virtio_pci_common_cfg, device_status, status); + } else { + vp_write(&vp->legacy, virtio_pci_legacy, status, status); + } +} + +u8 vp_get_isr(struct vp_device *vp) +{ + if (vp->use_modern) { + return vp_read(&vp->isr, virtio_pci_isr, isr); + } else { + return vp_read(&vp->legacy, virtio_pci_legacy, isr); + } +} + +void vp_reset(struct vp_device *vp) +{ + if (vp->use_modern) { + vp_write(&vp->common, virtio_pci_common_cfg, device_status, 0); + vp_read(&vp->isr, virtio_pci_isr, isr); + } else { + vp_write(&vp->legacy, virtio_pci_legacy, status, 0); + vp_read(&vp->legacy, virtio_pci_legacy, isr); + } +} + +void vp_notify(struct vp_device *vp, struct vring_virtqueue *vq) +{ + if (vp->use_modern) { + u32 addr = vp->notify.addr + + vq->queue_notify_off * + vp->notify_off_multiplier; + if (vp->notify.is_io) { + outw(vq->queue_index, addr); + } else { + writew((void*)addr, vq->queue_index); + } + dprintf(9, "vp notify %x (%d) -- 0x%x\n", + addr, 2, vq->queue_index); + } else { + vp_write(&vp->legacy, virtio_pci_legacy, queue_notify, vq->queue_index); + } +} + +int vp_find_vq(struct vp_device *vp, int queue_index, struct vring_virtqueue **p_vq) { u16 num; ASSERT32FLAT(); - struct vring_virtqueue *vq = *p_vq = memalign_low(PAGE_SIZE, sizeof(*vq)); + struct vring_virtqueue *vq = *p_vq = memalign_high(PAGE_SIZE, sizeof(*vq)); if (!vq) { warn_noalloc(); goto fail; } memset(vq, 0, sizeof(*vq)); - /* select the queue */ - outw(queue_index, ioaddr + VIRTIO_PCI_QUEUE_SEL); + /* select the queue */ + if (vp->use_modern) { + vp_write(&vp->common, virtio_pci_common_cfg, queue_select, queue_index); + } else { + vp_write(&vp->legacy, virtio_pci_legacy, queue_sel, queue_index); + } /* check if the queue is available */ - - num = inw(ioaddr + VIRTIO_PCI_QUEUE_NUM); + if (vp->use_modern) { + num = vp_read(&vp->common, virtio_pci_common_cfg, queue_size); + if (num > MAX_QUEUE_NUM) { + vp_write(&vp->common, virtio_pci_common_cfg, queue_size, + MAX_QUEUE_NUM); + num = vp_read(&vp->common, virtio_pci_common_cfg, queue_size); + } + } else { + num = vp_read(&vp->legacy, virtio_pci_legacy, queue_num); + } if (!num) { dprintf(1, "ERROR: queue size is 0\n"); goto fail; } - if (num > MAX_QUEUE_NUM) { dprintf(1, "ERROR: queue size %d > %d\n", num, MAX_QUEUE_NUM); goto fail; } /* check if the queue is already active */ - - if (inl(ioaddr + VIRTIO_PCI_QUEUE_PFN)) { - dprintf(1, "ERROR: queue already active\n"); - goto fail; + if (vp->use_modern) { + if (vp_read(&vp->common, virtio_pci_common_cfg, queue_enable)) { + dprintf(1, "ERROR: queue already active\n"); + goto fail; + } + } else { + if (vp_read(&vp->legacy, virtio_pci_legacy, queue_pfn)) { + dprintf(1, "ERROR: queue already active\n"); + goto fail; + } } - vq->queue_index = queue_index; /* initialize the queue */ - struct vring * vr = &vq->vring; vring_init(vr, num, (unsigned char*)&vq->queue); @@ -73,9 +179,23 @@ int vp_find_vq(unsigned int ioaddr, int queue_index, * NOTE: vr->desc is initialized by vring_init() */ - outl((unsigned long)virt_to_phys(vr->desc) >> PAGE_SHIFT, - ioaddr + VIRTIO_PCI_QUEUE_PFN); - + if (vp->use_modern) { + vp_write(&vp->common, virtio_pci_common_cfg, queue_desc_lo, + (unsigned long)virt_to_phys(vr->desc)); + vp_write(&vp->common, virtio_pci_common_cfg, queue_desc_hi, 0); + vp_write(&vp->common, virtio_pci_common_cfg, queue_avail_lo, + (unsigned long)virt_to_phys(vr->avail)); + vp_write(&vp->common, virtio_pci_common_cfg, queue_avail_hi, 0); + vp_write(&vp->common, virtio_pci_common_cfg, queue_used_lo, + (unsigned long)virt_to_phys(vr->used)); + vp_write(&vp->common, virtio_pci_common_cfg, queue_used_hi, 0); + vp_write(&vp->common, virtio_pci_common_cfg, queue_enable, 1); + vq->queue_notify_off = vp_read(&vp->common, virtio_pci_common_cfg, + queue_notify_off); + } else { + vp_write(&vp->legacy, virtio_pci_legacy, queue_pfn, + (unsigned long)virt_to_phys(vr->desc) >> PAGE_SHIFT); + } return num; fail: @@ -84,14 +204,76 @@ fail: return -1; } -u16 vp_init_simple(u16 bdf) +void vp_init_simple(struct vp_device *vp, struct pci_device *pci) { - u16 ioaddr = pci_config_readl(bdf, PCI_BASE_ADDRESS_0) & - PCI_BASE_ADDRESS_IO_MASK; + u8 cap = pci_find_capability(pci, PCI_CAP_ID_VNDR, 0); + struct vp_cap *vp_cap; + u32 addr, offset, mul; + u8 type; + + memset(vp, 0, sizeof(*vp)); + while (cap != 0) { + type = pci_config_readb(pci->bdf, cap + + offsetof(struct virtio_pci_cap, cfg_type)); + switch (type) { + case VIRTIO_PCI_CAP_COMMON_CFG: + vp_cap = &vp->common; + break; + case VIRTIO_PCI_CAP_NOTIFY_CFG: + vp_cap = &vp->notify; + mul = offsetof(struct virtio_pci_notify_cap, notify_off_multiplier); + vp->notify_off_multiplier = pci_config_readl(pci->bdf, cap + mul); + break; + case VIRTIO_PCI_CAP_ISR_CFG: + vp_cap = &vp->isr; + break; + case VIRTIO_PCI_CAP_DEVICE_CFG: + vp_cap = &vp->device; + break; + default: + vp_cap = NULL; + break; + } + if (vp_cap && !vp_cap->cap) { + vp_cap->cap = cap; + vp_cap->bar = pci_config_readb(pci->bdf, cap + + offsetof(struct virtio_pci_cap, bar)); + offset = pci_config_readl(pci->bdf, cap + + offsetof(struct virtio_pci_cap, offset)); + addr = pci_config_readl(pci->bdf, PCI_BASE_ADDRESS_0 + 4 * vp_cap->bar); + if (addr & PCI_BASE_ADDRESS_SPACE_IO) { + vp_cap->is_io = 1; + addr &= PCI_BASE_ADDRESS_IO_MASK; + } else { + vp_cap->is_io = 0; + addr &= PCI_BASE_ADDRESS_MEM_MASK; + } + vp_cap->addr = addr + offset; + dprintf(3, "pci dev %x:%x virtio cap at 0x%x type %d " + "bar %d at 0x%08x off +0x%04x [%s]\n", + pci_bdf_to_bus(pci->bdf), pci_bdf_to_dev(pci->bdf), + vp_cap->cap, type, vp_cap->bar, addr, offset, + vp_cap->is_io ? "io" : "mmio"); + } + + cap = pci_find_capability(pci, PCI_CAP_ID_VNDR, cap); + } + + if (vp->common.cap && vp->notify.cap && vp->isr.cap && vp->device.cap) { + dprintf(1, "pci dev %x:%x using modern (1.0) virtio mode\n", + pci_bdf_to_bus(pci->bdf), pci_bdf_to_dev(pci->bdf)); + vp->use_modern = 1; + } else { + dprintf(1, "pci dev %x:%x using legacy (0.9.5) virtio mode\n", + pci_bdf_to_bus(pci->bdf), pci_bdf_to_dev(pci->bdf)); + vp->legacy.bar = 0; + vp->legacy.addr = pci_config_readl(pci->bdf, PCI_BASE_ADDRESS_0) & + PCI_BASE_ADDRESS_IO_MASK; + vp->legacy.is_io = 1; + } - vp_reset(ioaddr); - pci_config_maskw(bdf, PCI_COMMAND, 0, PCI_COMMAND_MASTER); - vp_set_status(ioaddr, VIRTIO_CONFIG_S_ACKNOWLEDGE | + vp_reset(vp); + pci_config_maskw(pci->bdf, PCI_COMMAND, 0, PCI_COMMAND_MASTER); + vp_set_status(vp, VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER ); - return ioaddr; } |