669 строки
20 KiB
C
669 строки
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/virtio_pci_modern.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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/*
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* vp_modern_map_capability - map a part of virtio pci capability
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* @mdev: the modern virtio-pci device
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* @off: offset of the capability
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* @minlen: minimal length of the capability
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* @align: align requirement
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* @start: start from the capability
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* @size: map size
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* @len: the length that is actually mapped
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* @pa: physical address of the capability
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*
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* Returns the io address of for the part of the capability
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*/
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static void __iomem *
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vp_modern_map_capability(struct virtio_pci_modern_device *mdev, int off,
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size_t minlen, u32 align, u32 start, u32 size,
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size_t *len, resource_size_t *pa)
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{
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struct pci_dev *dev = mdev->pci_dev;
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u8 bar;
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u32 offset, length;
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void __iomem *p;
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pci_read_config_byte(dev, off + offsetof(struct virtio_pci_cap,
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bar),
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&bar);
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pci_read_config_dword(dev, off + offsetof(struct virtio_pci_cap, offset),
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&offset);
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pci_read_config_dword(dev, off + offsetof(struct virtio_pci_cap, length),
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&length);
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/* Check if the BAR may have changed since we requested the region. */
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if (bar >= PCI_STD_NUM_BARS || !(mdev->modern_bars & (1 << bar))) {
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dev_err(&dev->dev,
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"virtio_pci: bar unexpectedly changed to %u\n", bar);
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return NULL;
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}
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if (length <= start) {
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dev_err(&dev->dev,
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"virtio_pci: bad capability len %u (>%u expected)\n",
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length, start);
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return NULL;
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}
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if (length - start < minlen) {
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dev_err(&dev->dev,
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"virtio_pci: bad capability len %u (>=%zu expected)\n",
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length, minlen);
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return NULL;
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}
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length -= start;
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if (start + offset < offset) {
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dev_err(&dev->dev,
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"virtio_pci: map wrap-around %u+%u\n",
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start, offset);
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return NULL;
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}
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offset += start;
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if (offset & (align - 1)) {
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dev_err(&dev->dev,
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"virtio_pci: offset %u not aligned to %u\n",
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offset, align);
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return NULL;
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}
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if (length > size)
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length = size;
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if (len)
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*len = length;
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if (minlen + offset < minlen ||
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minlen + offset > pci_resource_len(dev, bar)) {
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dev_err(&dev->dev,
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"virtio_pci: map virtio %zu@%u "
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"out of range on bar %i length %lu\n",
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minlen, offset,
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bar, (unsigned long)pci_resource_len(dev, bar));
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return NULL;
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}
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p = pci_iomap_range(dev, bar, offset, length);
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if (!p)
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dev_err(&dev->dev,
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"virtio_pci: unable to map virtio %u@%u on bar %i\n",
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length, offset, bar);
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else if (pa)
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*pa = pci_resource_start(dev, bar) + offset;
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return p;
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}
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/**
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* virtio_pci_find_capability - walk capabilities to find device info.
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* @dev: the pci device
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* @cfg_type: the VIRTIO_PCI_CAP_* value we seek
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* @ioresource_types: IORESOURCE_MEM and/or IORESOURCE_IO.
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* @bars: the bitmask of BARs
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*
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* Returns offset of the capability, or 0.
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*/
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static inline int virtio_pci_find_capability(struct pci_dev *dev, u8 cfg_type,
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u32 ioresource_types, int *bars)
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{
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int pos;
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for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR);
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pos > 0;
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pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) {
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u8 type, bar;
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pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap,
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cfg_type),
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&type);
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pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap,
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bar),
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&bar);
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/* Ignore structures with reserved BAR values */
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if (bar >= PCI_STD_NUM_BARS)
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continue;
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if (type == cfg_type) {
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if (pci_resource_len(dev, bar) &&
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pci_resource_flags(dev, bar) & ioresource_types) {
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*bars |= (1 << bar);
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return pos;
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}
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}
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}
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return 0;
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}
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/* This is part of the ABI. Don't screw with it. */
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static inline void check_offsets(void)
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{
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/* Note: disk space was harmed in compilation of this function. */
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BUILD_BUG_ON(VIRTIO_PCI_CAP_VNDR !=
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offsetof(struct virtio_pci_cap, cap_vndr));
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BUILD_BUG_ON(VIRTIO_PCI_CAP_NEXT !=
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offsetof(struct virtio_pci_cap, cap_next));
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BUILD_BUG_ON(VIRTIO_PCI_CAP_LEN !=
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offsetof(struct virtio_pci_cap, cap_len));
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BUILD_BUG_ON(VIRTIO_PCI_CAP_CFG_TYPE !=
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offsetof(struct virtio_pci_cap, cfg_type));
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BUILD_BUG_ON(VIRTIO_PCI_CAP_BAR !=
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offsetof(struct virtio_pci_cap, bar));
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BUILD_BUG_ON(VIRTIO_PCI_CAP_OFFSET !=
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offsetof(struct virtio_pci_cap, offset));
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BUILD_BUG_ON(VIRTIO_PCI_CAP_LENGTH !=
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offsetof(struct virtio_pci_cap, length));
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BUILD_BUG_ON(VIRTIO_PCI_NOTIFY_CAP_MULT !=
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offsetof(struct virtio_pci_notify_cap,
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notify_off_multiplier));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_DFSELECT !=
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offsetof(struct virtio_pci_common_cfg,
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device_feature_select));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_DF !=
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offsetof(struct virtio_pci_common_cfg, device_feature));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_GFSELECT !=
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offsetof(struct virtio_pci_common_cfg,
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guest_feature_select));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_GF !=
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offsetof(struct virtio_pci_common_cfg, guest_feature));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_MSIX !=
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offsetof(struct virtio_pci_common_cfg, msix_config));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_NUMQ !=
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offsetof(struct virtio_pci_common_cfg, num_queues));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_STATUS !=
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offsetof(struct virtio_pci_common_cfg, device_status));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_CFGGENERATION !=
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offsetof(struct virtio_pci_common_cfg, config_generation));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_Q_SELECT !=
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offsetof(struct virtio_pci_common_cfg, queue_select));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_Q_SIZE !=
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offsetof(struct virtio_pci_common_cfg, queue_size));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_Q_MSIX !=
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offsetof(struct virtio_pci_common_cfg, queue_msix_vector));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_Q_ENABLE !=
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offsetof(struct virtio_pci_common_cfg, queue_enable));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_Q_NOFF !=
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offsetof(struct virtio_pci_common_cfg, queue_notify_off));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_Q_DESCLO !=
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offsetof(struct virtio_pci_common_cfg, queue_desc_lo));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_Q_DESCHI !=
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offsetof(struct virtio_pci_common_cfg, queue_desc_hi));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_Q_AVAILLO !=
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offsetof(struct virtio_pci_common_cfg, queue_avail_lo));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_Q_AVAILHI !=
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offsetof(struct virtio_pci_common_cfg, queue_avail_hi));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_Q_USEDLO !=
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offsetof(struct virtio_pci_common_cfg, queue_used_lo));
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BUILD_BUG_ON(VIRTIO_PCI_COMMON_Q_USEDHI !=
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offsetof(struct virtio_pci_common_cfg, queue_used_hi));
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}
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/*
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* vp_modern_probe: probe the modern virtio pci device, note that the
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* caller is required to enable PCI device before calling this function.
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* @mdev: the modern virtio-pci device
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*
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* Return 0 on succeed otherwise fail
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*/
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int vp_modern_probe(struct virtio_pci_modern_device *mdev)
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{
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struct pci_dev *pci_dev = mdev->pci_dev;
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int err, common, isr, notify, device;
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u32 notify_length;
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u32 notify_offset;
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check_offsets();
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mdev->pci_dev = pci_dev;
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/* We only own devices >= 0x1000 and <= 0x107f: leave the rest. */
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if (pci_dev->device < 0x1000 || pci_dev->device > 0x107f)
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return -ENODEV;
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if (pci_dev->device < 0x1040) {
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/* Transitional devices: use the PCI subsystem device id as
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* virtio device id, same as legacy driver always did.
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*/
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mdev->id.device = pci_dev->subsystem_device;
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} else {
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/* Modern devices: simply use PCI device id, but start from 0x1040. */
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mdev->id.device = pci_dev->device - 0x1040;
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}
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mdev->id.vendor = pci_dev->subsystem_vendor;
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/* check for a common config: if not, use legacy mode (bar 0). */
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common = virtio_pci_find_capability(pci_dev, VIRTIO_PCI_CAP_COMMON_CFG,
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IORESOURCE_IO | IORESOURCE_MEM,
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&mdev->modern_bars);
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if (!common) {
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dev_info(&pci_dev->dev,
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"virtio_pci: leaving for legacy driver\n");
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return -ENODEV;
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}
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/* If common is there, these should be too... */
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isr = virtio_pci_find_capability(pci_dev, VIRTIO_PCI_CAP_ISR_CFG,
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IORESOURCE_IO | IORESOURCE_MEM,
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&mdev->modern_bars);
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notify = virtio_pci_find_capability(pci_dev, VIRTIO_PCI_CAP_NOTIFY_CFG,
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IORESOURCE_IO | IORESOURCE_MEM,
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&mdev->modern_bars);
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if (!isr || !notify) {
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dev_err(&pci_dev->dev,
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"virtio_pci: missing capabilities %i/%i/%i\n",
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common, isr, notify);
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return -EINVAL;
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}
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err = dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(64));
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if (err)
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err = dma_set_mask_and_coherent(&pci_dev->dev,
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DMA_BIT_MASK(32));
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if (err)
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dev_warn(&pci_dev->dev, "Failed to enable 64-bit or 32-bit DMA. Trying to continue, but this might not work.\n");
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/* Device capability is only mandatory for devices that have
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* device-specific configuration.
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*/
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device = virtio_pci_find_capability(pci_dev, VIRTIO_PCI_CAP_DEVICE_CFG,
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IORESOURCE_IO | IORESOURCE_MEM,
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&mdev->modern_bars);
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err = pci_request_selected_regions(pci_dev, mdev->modern_bars,
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"virtio-pci-modern");
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if (err)
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return err;
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err = -EINVAL;
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mdev->common = vp_modern_map_capability(mdev, common,
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sizeof(struct virtio_pci_common_cfg), 4,
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0, sizeof(struct virtio_pci_common_cfg),
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NULL, NULL);
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if (!mdev->common)
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goto err_map_common;
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mdev->isr = vp_modern_map_capability(mdev, isr, sizeof(u8), 1,
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0, 1,
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NULL, NULL);
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if (!mdev->isr)
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goto err_map_isr;
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/* Read notify_off_multiplier from config space. */
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pci_read_config_dword(pci_dev,
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notify + offsetof(struct virtio_pci_notify_cap,
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notify_off_multiplier),
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&mdev->notify_offset_multiplier);
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/* Read notify length and offset from config space. */
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pci_read_config_dword(pci_dev,
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notify + offsetof(struct virtio_pci_notify_cap,
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cap.length),
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¬ify_length);
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pci_read_config_dword(pci_dev,
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notify + offsetof(struct virtio_pci_notify_cap,
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cap.offset),
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¬ify_offset);
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/* We don't know how many VQs we'll map, ahead of the time.
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* If notify length is small, map it all now.
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* Otherwise, map each VQ individually later.
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*/
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if ((u64)notify_length + (notify_offset % PAGE_SIZE) <= PAGE_SIZE) {
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mdev->notify_base = vp_modern_map_capability(mdev, notify,
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2, 2,
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0, notify_length,
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&mdev->notify_len,
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&mdev->notify_pa);
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if (!mdev->notify_base)
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goto err_map_notify;
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} else {
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mdev->notify_map_cap = notify;
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}
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/* Again, we don't know how much we should map, but PAGE_SIZE
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* is more than enough for all existing devices.
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*/
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if (device) {
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mdev->device = vp_modern_map_capability(mdev, device, 0, 4,
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0, PAGE_SIZE,
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&mdev->device_len,
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NULL);
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if (!mdev->device)
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goto err_map_device;
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}
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return 0;
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err_map_device:
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if (mdev->notify_base)
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pci_iounmap(pci_dev, mdev->notify_base);
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err_map_notify:
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pci_iounmap(pci_dev, mdev->isr);
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err_map_isr:
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pci_iounmap(pci_dev, mdev->common);
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err_map_common:
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return err;
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}
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EXPORT_SYMBOL_GPL(vp_modern_probe);
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/*
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* vp_modern_remove: remove and cleanup the modern virtio pci device
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* @mdev: the modern virtio-pci device
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*/
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void vp_modern_remove(struct virtio_pci_modern_device *mdev)
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{
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struct pci_dev *pci_dev = mdev->pci_dev;
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if (mdev->device)
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pci_iounmap(pci_dev, mdev->device);
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if (mdev->notify_base)
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pci_iounmap(pci_dev, mdev->notify_base);
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pci_iounmap(pci_dev, mdev->isr);
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pci_iounmap(pci_dev, mdev->common);
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pci_release_selected_regions(pci_dev, mdev->modern_bars);
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}
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EXPORT_SYMBOL_GPL(vp_modern_remove);
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/*
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* vp_modern_get_features - get features from device
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* @mdev: the modern virtio-pci device
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*
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* Returns the features read from the device
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*/
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u64 vp_modern_get_features(struct virtio_pci_modern_device *mdev)
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{
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struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
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u64 features;
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vp_iowrite32(0, &cfg->device_feature_select);
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features = vp_ioread32(&cfg->device_feature);
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vp_iowrite32(1, &cfg->device_feature_select);
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features |= ((u64)vp_ioread32(&cfg->device_feature) << 32);
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return features;
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}
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EXPORT_SYMBOL_GPL(vp_modern_get_features);
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/*
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* vp_modern_get_driver_features - get driver features from device
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* @mdev: the modern virtio-pci device
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*
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* Returns the driver features read from the device
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*/
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u64 vp_modern_get_driver_features(struct virtio_pci_modern_device *mdev)
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{
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struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
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u64 features;
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vp_iowrite32(0, &cfg->guest_feature_select);
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features = vp_ioread32(&cfg->guest_feature);
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vp_iowrite32(1, &cfg->guest_feature_select);
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features |= ((u64)vp_ioread32(&cfg->guest_feature) << 32);
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return features;
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}
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EXPORT_SYMBOL_GPL(vp_modern_get_driver_features);
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/*
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* vp_modern_set_features - set features to device
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* @mdev: the modern virtio-pci device
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* @features: the features set to device
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*/
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void vp_modern_set_features(struct virtio_pci_modern_device *mdev,
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u64 features)
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{
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struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
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vp_iowrite32(0, &cfg->guest_feature_select);
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vp_iowrite32((u32)features, &cfg->guest_feature);
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vp_iowrite32(1, &cfg->guest_feature_select);
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vp_iowrite32(features >> 32, &cfg->guest_feature);
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}
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EXPORT_SYMBOL_GPL(vp_modern_set_features);
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/*
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* vp_modern_generation - get the device genreation
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* @mdev: the modern virtio-pci device
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*
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* Returns the genreation read from device
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*/
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u32 vp_modern_generation(struct virtio_pci_modern_device *mdev)
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{
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struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
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return vp_ioread8(&cfg->config_generation);
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}
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EXPORT_SYMBOL_GPL(vp_modern_generation);
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/*
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* vp_modern_get_status - get the device status
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* @mdev: the modern virtio-pci device
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*
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* Returns the status read from device
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*/
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u8 vp_modern_get_status(struct virtio_pci_modern_device *mdev)
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{
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struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
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return vp_ioread8(&cfg->device_status);
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}
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EXPORT_SYMBOL_GPL(vp_modern_get_status);
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/*
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* vp_modern_set_status - set status to device
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* @mdev: the modern virtio-pci device
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* @status: the status set to device
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*/
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void vp_modern_set_status(struct virtio_pci_modern_device *mdev,
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u8 status)
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{
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struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
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|
|
|
vp_iowrite8(status, &cfg->device_status);
|
|
}
|
|
EXPORT_SYMBOL_GPL(vp_modern_set_status);
|
|
|
|
/*
|
|
* vp_modern_queue_vector - set the MSIX vector for a specific virtqueue
|
|
* @mdev: the modern virtio-pci device
|
|
* @index: queue index
|
|
* @vector: the config vector
|
|
*
|
|
* Returns the config vector read from the device
|
|
*/
|
|
u16 vp_modern_queue_vector(struct virtio_pci_modern_device *mdev,
|
|
u16 index, u16 vector)
|
|
{
|
|
struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
|
|
|
|
vp_iowrite16(index, &cfg->queue_select);
|
|
vp_iowrite16(vector, &cfg->queue_msix_vector);
|
|
/* Flush the write out to device */
|
|
return vp_ioread16(&cfg->queue_msix_vector);
|
|
}
|
|
EXPORT_SYMBOL_GPL(vp_modern_queue_vector);
|
|
|
|
/*
|
|
* vp_modern_config_vector - set the vector for config interrupt
|
|
* @mdev: the modern virtio-pci device
|
|
* @vector: the config vector
|
|
*
|
|
* Returns the config vector read from the device
|
|
*/
|
|
u16 vp_modern_config_vector(struct virtio_pci_modern_device *mdev,
|
|
u16 vector)
|
|
{
|
|
struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
|
|
|
|
/* Setup the vector used for configuration events */
|
|
vp_iowrite16(vector, &cfg->msix_config);
|
|
/* Verify we had enough resources to assign the vector */
|
|
/* Will also flush the write out to device */
|
|
return vp_ioread16(&cfg->msix_config);
|
|
}
|
|
EXPORT_SYMBOL_GPL(vp_modern_config_vector);
|
|
|
|
/*
|
|
* vp_modern_queue_address - set the virtqueue address
|
|
* @mdev: the modern virtio-pci device
|
|
* @index: the queue index
|
|
* @desc_addr: address of the descriptor area
|
|
* @driver_addr: address of the driver area
|
|
* @device_addr: address of the device area
|
|
*/
|
|
void vp_modern_queue_address(struct virtio_pci_modern_device *mdev,
|
|
u16 index, u64 desc_addr, u64 driver_addr,
|
|
u64 device_addr)
|
|
{
|
|
struct virtio_pci_common_cfg __iomem *cfg = mdev->common;
|
|
|
|
vp_iowrite16(index, &cfg->queue_select);
|
|
|
|
vp_iowrite64_twopart(desc_addr, &cfg->queue_desc_lo,
|
|
&cfg->queue_desc_hi);
|
|
vp_iowrite64_twopart(driver_addr, &cfg->queue_avail_lo,
|
|
&cfg->queue_avail_hi);
|
|
vp_iowrite64_twopart(device_addr, &cfg->queue_used_lo,
|
|
&cfg->queue_used_hi);
|
|
}
|
|
EXPORT_SYMBOL_GPL(vp_modern_queue_address);
|
|
|
|
/*
|
|
* vp_modern_set_queue_enable - enable a virtqueue
|
|
* @mdev: the modern virtio-pci device
|
|
* @index: the queue index
|
|
* @enable: whether the virtqueue is enable or not
|
|
*/
|
|
void vp_modern_set_queue_enable(struct virtio_pci_modern_device *mdev,
|
|
u16 index, bool enable)
|
|
{
|
|
vp_iowrite16(index, &mdev->common->queue_select);
|
|
vp_iowrite16(enable, &mdev->common->queue_enable);
|
|
}
|
|
EXPORT_SYMBOL_GPL(vp_modern_set_queue_enable);
|
|
|
|
/*
|
|
* vp_modern_get_queue_enable - enable a virtqueue
|
|
* @mdev: the modern virtio-pci device
|
|
* @index: the queue index
|
|
*
|
|
* Returns whether a virtqueue is enabled or not
|
|
*/
|
|
bool vp_modern_get_queue_enable(struct virtio_pci_modern_device *mdev,
|
|
u16 index)
|
|
{
|
|
vp_iowrite16(index, &mdev->common->queue_select);
|
|
|
|
return vp_ioread16(&mdev->common->queue_enable);
|
|
}
|
|
EXPORT_SYMBOL_GPL(vp_modern_get_queue_enable);
|
|
|
|
/*
|
|
* vp_modern_set_queue_size - set size for a virtqueue
|
|
* @mdev: the modern virtio-pci device
|
|
* @index: the queue index
|
|
* @size: the size of the virtqueue
|
|
*/
|
|
void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev,
|
|
u16 index, u16 size)
|
|
{
|
|
vp_iowrite16(index, &mdev->common->queue_select);
|
|
vp_iowrite16(size, &mdev->common->queue_size);
|
|
|
|
}
|
|
EXPORT_SYMBOL_GPL(vp_modern_set_queue_size);
|
|
|
|
/*
|
|
* vp_modern_get_queue_size - get size for a virtqueue
|
|
* @mdev: the modern virtio-pci device
|
|
* @index: the queue index
|
|
*
|
|
* Returns the size of the virtqueue
|
|
*/
|
|
u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
|
|
u16 index)
|
|
{
|
|
vp_iowrite16(index, &mdev->common->queue_select);
|
|
|
|
return vp_ioread16(&mdev->common->queue_size);
|
|
|
|
}
|
|
EXPORT_SYMBOL_GPL(vp_modern_get_queue_size);
|
|
|
|
/*
|
|
* vp_modern_get_num_queues - get the number of virtqueues
|
|
* @mdev: the modern virtio-pci device
|
|
*
|
|
* Returns the number of virtqueues
|
|
*/
|
|
u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev)
|
|
{
|
|
return vp_ioread16(&mdev->common->num_queues);
|
|
}
|
|
EXPORT_SYMBOL_GPL(vp_modern_get_num_queues);
|
|
|
|
/*
|
|
* vp_modern_get_queue_notify_off - get notification offset for a virtqueue
|
|
* @mdev: the modern virtio-pci device
|
|
* @index: the queue index
|
|
*
|
|
* Returns the notification offset for a virtqueue
|
|
*/
|
|
static u16 vp_modern_get_queue_notify_off(struct virtio_pci_modern_device *mdev,
|
|
u16 index)
|
|
{
|
|
vp_iowrite16(index, &mdev->common->queue_select);
|
|
|
|
return vp_ioread16(&mdev->common->queue_notify_off);
|
|
}
|
|
|
|
/*
|
|
* vp_modern_map_vq_notify - map notification area for a
|
|
* specific virtqueue
|
|
* @mdev: the modern virtio-pci device
|
|
* @index: the queue index
|
|
* @pa: the pointer to the physical address of the nofity area
|
|
*
|
|
* Returns the address of the notification area
|
|
*/
|
|
void __iomem *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
|
|
u16 index, resource_size_t *pa)
|
|
{
|
|
u16 off = vp_modern_get_queue_notify_off(mdev, index);
|
|
|
|
if (mdev->notify_base) {
|
|
/* offset should not wrap */
|
|
if ((u64)off * mdev->notify_offset_multiplier + 2
|
|
> mdev->notify_len) {
|
|
dev_warn(&mdev->pci_dev->dev,
|
|
"bad notification offset %u (x %u) "
|
|
"for queue %u > %zd",
|
|
off, mdev->notify_offset_multiplier,
|
|
index, mdev->notify_len);
|
|
return NULL;
|
|
}
|
|
if (pa)
|
|
*pa = mdev->notify_pa +
|
|
off * mdev->notify_offset_multiplier;
|
|
return mdev->notify_base + off * mdev->notify_offset_multiplier;
|
|
} else {
|
|
return vp_modern_map_capability(mdev,
|
|
mdev->notify_map_cap, 2, 2,
|
|
off * mdev->notify_offset_multiplier, 2,
|
|
NULL, pa);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(vp_modern_map_vq_notify);
|
|
|
|
MODULE_VERSION("0.1");
|
|
MODULE_DESCRIPTION("Modern Virtio PCI Device");
|
|
MODULE_AUTHOR("Jason Wang <jasowang@redhat.com>");
|
|
MODULE_LICENSE("GPL");
|