find_pci_pdev is not used any more, remove it.

Tracked-On: #3241
Signed-off-by: dongshen <dongsheng.x.zhang@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

Add get_offset_of_caplist() function to return capability offset based on header type:
For normal pci device and bridge, its capability offset is at offset 0x34
For cardbus, its capability offset is at offset 0x14

Tracked-On: #3241
Signed-off-by: dongshen <dongsheng.x.zhang@intel.com>
Reviewed-by: Eddie Dong <eddie.dong@intel.com>

union pci_bar uses bit fields and follows the PCI bar spec definition to define the
bar flags portion and base address, this is to keep the same hardware format for vbar
register. The base/type of union pci_bar are still kept to minimize code changes
in one patch, they will be removed in subsequent patches.

define pci_pdev_get_bar_base() function to extract bar base address given a 32-bit raw
bar value

define a utility function pci_get_bar_type() to extract bar types
from raw bar value to simply code, as this function will be used in multiple
places later on: this function can be called on reg->value stored in struct
pci_bar to derive bar type.

Tracked-On: #3241
Signed-off-by: dongshen <dongsheng.x.zhang@intel.com>
Reviewed-by: Eddie Dong <eddie.dong@intel.com>

nr_bars in struct pci_pdev is used to store the actual # of bars (
6 for normal pci device and 2 for pci bridge), nr_bars will be used in subsequent
patches

Use uint32_t for bar related variables (bar index, etc) to unify the bar
related code (no casting between uint32_t and uint8_t)

Tracked-On: #3241
Signed-off-by: dongshen <dongsheng.x.zhang@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

And put the checking in vdev_pt_write_cfg instead to have less nesting in
vdev_pt_write_vbar to improve code readability.

Rename function:
vdev_pt_remap_generic_bar --> vdev_pt_remap_generic_mem_vbar

vdev_pt_read_cfg's function declaration is merged into one line instead of 2
lines

Tracked-On: #3241
Signed-off-by: dongshen <dongsheng.x.zhang@intel.com>
Reviewed-by: Eddie Dong <eddie.dong@intel.com>

Use nr_bars instead of PCI_BAR_COUNT to check bar access offset.
As while normal pci device has max 6 bars, pci bridge only has 2 bars,
so for pci normal pci device, pci cfg offsets 0x10-0x24 are for bar access,
but for pci bridge, only 0x10-0x14 are for bar access (0x18-0x24 are
for other accesses).

Rename function:
 pci_bar_access --> is_bar_offset

Tracked-On: #3241
Signed-off-by: dongshen <dongsheng.x.zhang@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>