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HV: extract functions from code to improve code reuse and readability

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Create 2 functions from code:
 pci_base_from_size_mask
 vdev_pt_remap_mem_vbar

Use vbar in place of vdev->bar[idx] by setting vbar to &vdev->bar[idx]

Change base to uint64_t to accommodate 64-bit MMIO bar size masking in
subsequent commits

Tracked-On: #3241
Signed-off-by: dongshen <dongsheng.x.zhang@intel.com>
Reviewed-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
dongshen 2019-06-25 12:42:21 -07:00 committed by ACRN System Integration
parent 84e09a2246
commit ae996250c1
2 changed files with 39 additions and 14 deletions
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40
hypervisor/dm/vpci/pci_pt.c
View File

@ -305,6 +305,22 @@ static void vdev_pt_remap_generic_mem_vbar(struct pci_vdev *vdev, uint32_t idx)
}
}
/**
* @pre vdev != NULL
*/
static void vdev_pt_remap_mem_vbar(struct pci_vdev *vdev, uint32_t idx)
{
bool is_msix_table_bar;
is_msix_table_bar = (has_msix_cap(vdev) && (idx == vdev->msix.table_bar));
if (is_msix_table_bar) {
vdev_pt_remap_msix_table_bar(vdev);
} else {
vdev_pt_remap_generic_mem_vbar(vdev, idx);
}
}
/**
* @brief Set the base address portion of the vbar base address register (32-bit)
* base: bar value with flags portion masked off
@ -335,30 +351,26 @@ static void set_vbar_base(struct pci_bar *vbar, uint32_t base)
static void vdev_pt_write_vbar(struct pci_vdev *vdev, uint32_t offset, uint32_t val)
{
uint32_t idx;
uint32_t base, mask;
uint64_t base;
bool bar_update_normal;
bool is_msix_table_bar;
struct pci_bar *vbar;
base = 0U;
base = 0UL;
idx = (offset - pci_bar_offset(0U)) >> 2U;
mask = ~(vdev->bar[idx].size - 1U);
bar_update_normal = (val != (uint32_t)~0U);
vbar = &vdev->bar[idx];
switch (vdev->bar[idx].type) {
case PCIBAR_NONE:
break;
case PCIBAR_MEM32:
bar_update_normal = (val != (uint32_t)~0U);
is_msix_table_bar = (has_msix_cap(vdev) && (idx == vdev->msix.table_bar));
base = val & mask;
set_vbar_base(&vdev->bar[idx], base);
base = pci_base_from_size_mask(vbar->size, (uint64_t)val);
set_vbar_base(vbar, (uint32_t)base);
if (bar_update_normal) {
if (is_msix_table_bar) {
vdev_pt_remap_msix_table_bar(vdev);
} else {
vdev_pt_remap_generic_mem_vbar(vdev, idx);
}
vdev_pt_remap_mem_vbar(vdev, idx);
}
break;
@ -368,7 +380,7 @@ static void vdev_pt_write_vbar(struct pci_vdev *vdev, uint32_t offset, uint32_t
}
/* Write the vbar value to corresponding virtualized vbar reg */
pci_vdev_write_cfg_u32(vdev, offset, vdev->bar[idx].reg.value);
pci_vdev_write_cfg_u32(vdev, offset, vbar->reg.value);
}
/**

13
hypervisor/include/hw/pci.h
View File

@ -266,6 +266,19 @@ static inline enum pci_bar_type pci_get_bar_type(uint32_t val)
return type;
}
/**
* Given bar size and raw bar value, return bar base address by masking off its lower flag bits
* size/val: all in 64-bit values to accommodate 64-bit MMIO bar size masking
*/
static inline uint64_t pci_base_from_size_mask(uint64_t size, uint64_t val)
{
uint64_t mask;
mask = ~(size - 1UL);
return (mask & val);
}
static inline uint8_t pci_bus(uint16_t bdf)
{
return (uint8_t)((bdf >> 8U) & 0xFFU);