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hv: add ivshmem device 

Ivshmem device is used for shared memory based communication between
pre-launched/post-launched VMs.

this patch implements ivshmem device configuration space initialization
and ivshmem device operation methods.

v2: introduce init_one_pcibar interface to simplify BAR initialization
    operation of HV emulated PCI device.

v3: 1) due to init_one_pcibar API is only used for pre-launched VM vdevs
       it can't be applied to all vdevs, so remove it.
    2) move ivshmem BARs initialization to subsequent patch, this patch
       only introduce ivshmem configuration space initialization.

Tracked-On: #4853

Signed-off-by: Yuan Liu <yuan1.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yuan Liu 2020-08-14 12:08:22 +08:00 committed by wenlingz
parent d6f563c4eb
commit 92f9f5a4f3
2 changed files with 50 additions and 0 deletions
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48
hypervisor/dm/vpci/ivshmem.c
View File

@ -12,6 +12,12 @@
#include <ivshmem.h>
#include "vpci_priv.h"
/* config space of ivshmem device */
#define IVSHMEM_VENDOR_ID 0x1af4U
#define IVSHMEM_DEVICE_ID 0x1110U
#define IVSHMEM_CLASS 0x05U
#define IVSHMEM_REV 0x01U
/* IVSHMEM_SHM_SIZE is provided by offline tool */
static uint8_t ivshmem_base[IVSHMEM_SHM_SIZE] __aligned(PDE_SIZE);
@ -26,4 +32,46 @@ void init_ivshmem_shared_memory()
}
}
static int32_t read_ivshmem_vdev_cfg(const struct pci_vdev *vdev, uint32_t offset, uint32_t bytes, uint32_t *val)
{
/* Implementation in next patch */
(void) vdev;
(void) offset;
(void) bytes;
(void) val;
return 0;
}
static int32_t write_ivshmem_vdev_cfg(struct pci_vdev *vdev, uint32_t offset, uint32_t bytes, uint32_t val)
{
/* Implementation in next patch */
(void) vdev;
(void) offset;
(void) bytes;
(void) val;
return 0;
}
static void init_ivshmem_vdev(struct pci_vdev *vdev)
{
/* initialize ivshmem config */
pci_vdev_write_vcfg(vdev, PCIR_VENDOR, 2U, IVSHMEM_VENDOR_ID);
pci_vdev_write_vcfg(vdev, PCIR_DEVICE, 2U, IVSHMEM_DEVICE_ID);
pci_vdev_write_vcfg(vdev, PCIR_REVID, 1U, IVSHMEM_REV);
pci_vdev_write_vcfg(vdev, PCIR_CLASS, 1U, IVSHMEM_CLASS);
vdev->user = vdev;
}
static void deinit_ivshmem_vdev(struct pci_vdev *vdev)
{
vdev->user = NULL;
}
const struct pci_vdev_ops vpci_ivshmem_ops = {
.init_vdev = init_ivshmem_vdev,
.deinit_vdev = deinit_ivshmem_vdev,
.write_vdev_cfg = write_ivshmem_vdev_cfg,
.read_vdev_cfg = read_ivshmem_vdev_cfg,
};
#endif

2
hypervisor/include/dm/ivshmem.h
View File

@ -14,6 +14,8 @@ struct ivshmem_shm_region {
uint64_t size;
};
extern const struct pci_vdev_ops vpci_ivshmem_ops;
/**
* @brief Initialize ivshmem shared memory regions
*