mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Shannon Nelson](/assets/img/avatar_default.png)
To add a bit of vendor flexibility with various virtio based devices, allow the caller to specify a different DMA mask. This adds a dma_mask field to struct virtio_pci_modern_device. If defined by the driver, this mask will be used in a call to dma_set_mask_and_coherent() instead of the traditional DMA_BIT_MASK(64). This allows limiting the DMA space on vendor devices with address limitations. Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20230519215632.12343-3-shannon.nelson@amd.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_VIRTIO_PCI_MODERN_H
|
|
#define _LINUX_VIRTIO_PCI_MODERN_H
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/virtio_pci.h>
|
|
|
|
struct virtio_pci_modern_common_cfg {
|
|
struct virtio_pci_common_cfg cfg;
|
|
|
|
__le16 queue_notify_data; /* read-write */
|
|
__le16 queue_reset; /* read-write */
|
|
};
|
|
|
|
struct virtio_pci_modern_device {
|
|
struct pci_dev *pci_dev;
|
|
|
|
struct virtio_pci_common_cfg __iomem *common;
|
|
/* Device-specific data (non-legacy mode) */
|
|
void __iomem *device;
|
|
/* Base of vq notifications (non-legacy mode). */
|
|
void __iomem *notify_base;
|
|
/* Physical base of vq notifications */
|
|
resource_size_t notify_pa;
|
|
/* Where to read and clear interrupt */
|
|
u8 __iomem *isr;
|
|
|
|
/* So we can sanity-check accesses. */
|
|
size_t notify_len;
|
|
size_t device_len;
|
|
|
|
/* Capability for when we need to map notifications per-vq. */
|
|
int notify_map_cap;
|
|
|
|
/* Multiply queue_notify_off by this value. (non-legacy mode). */
|
|
u32 notify_offset_multiplier;
|
|
|
|
int modern_bars;
|
|
|
|
struct virtio_device_id id;
|
|
|
|
/* optional check for vendor virtio device, returns dev_id or -ERRNO */
|
|
int (*device_id_check)(struct pci_dev *pdev);
|
|
|
|
/* optional mask for devices with limited DMA space */
|
|
u64 dma_mask;
|
|
};
|
|
|
|
/*
|
|
* Type-safe wrappers for io accesses.
|
|
* Use these to enforce at compile time the following spec requirement:
|
|
*
|
|
* The driver MUST access each field using the “natural” access
|
|
* method, i.e. 32-bit accesses for 32-bit fields, 16-bit accesses
|
|
* for 16-bit fields and 8-bit accesses for 8-bit fields.
|
|
*/
|
|
static inline u8 vp_ioread8(const u8 __iomem *addr)
|
|
{
|
|
return ioread8(addr);
|
|
}
|
|
static inline u16 vp_ioread16 (const __le16 __iomem *addr)
|
|
{
|
|
return ioread16(addr);
|
|
}
|
|
|
|
static inline u32 vp_ioread32(const __le32 __iomem *addr)
|
|
{
|
|
return ioread32(addr);
|
|
}
|
|
|
|
static inline void vp_iowrite8(u8 value, u8 __iomem *addr)
|
|
{
|
|
iowrite8(value, addr);
|
|
}
|
|
|
|
static inline void vp_iowrite16(u16 value, __le16 __iomem *addr)
|
|
{
|
|
iowrite16(value, addr);
|
|
}
|
|
|
|
static inline void vp_iowrite32(u32 value, __le32 __iomem *addr)
|
|
{
|
|
iowrite32(value, addr);
|
|
}
|
|
|
|
static inline void vp_iowrite64_twopart(u64 val,
|
|
__le32 __iomem *lo,
|
|
__le32 __iomem *hi)
|
|
{
|
|
vp_iowrite32((u32)val, lo);
|
|
vp_iowrite32(val >> 32, hi);
|
|
}
|
|
|
|
u64 vp_modern_get_features(struct virtio_pci_modern_device *mdev);
|
|
u64 vp_modern_get_driver_features(struct virtio_pci_modern_device *mdev);
|
|
void vp_modern_set_features(struct virtio_pci_modern_device *mdev,
|
|
u64 features);
|
|
u32 vp_modern_generation(struct virtio_pci_modern_device *mdev);
|
|
u8 vp_modern_get_status(struct virtio_pci_modern_device *mdev);
|
|
void vp_modern_set_status(struct virtio_pci_modern_device *mdev,
|
|
u8 status);
|
|
u16 vp_modern_queue_vector(struct virtio_pci_modern_device *mdev,
|
|
u16 idx, u16 vector);
|
|
u16 vp_modern_config_vector(struct virtio_pci_modern_device *mdev,
|
|
u16 vector);
|
|
void vp_modern_queue_address(struct virtio_pci_modern_device *mdev,
|
|
u16 index, u64 desc_addr, u64 driver_addr,
|
|
u64 device_addr);
|
|
void vp_modern_set_queue_enable(struct virtio_pci_modern_device *mdev,
|
|
u16 idx, bool enable);
|
|
bool vp_modern_get_queue_enable(struct virtio_pci_modern_device *mdev,
|
|
u16 idx);
|
|
void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev,
|
|
u16 idx, u16 size);
|
|
u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
|
|
u16 idx);
|
|
u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev);
|
|
void __iomem * vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
|
|
u16 index, resource_size_t *pa);
|
|
int vp_modern_probe(struct virtio_pci_modern_device *mdev);
|
|
void vp_modern_remove(struct virtio_pci_modern_device *mdev);
|
|
int vp_modern_get_queue_reset(struct virtio_pci_modern_device *mdev, u16 index);
|
|
void vp_modern_set_queue_reset(struct virtio_pci_modern_device *mdev, u16 index);
|
|
#endif
|