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lib/vmd: Clear prefetch base and limit registers

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During PCI bridge initialization not all
registers was cleaned properly.

Change-Id: Ie0752bb303ba06e2a21669908efd9f746f6b0039
Signed-off-by: Wojciech Malikowski <wojciech.malikowski@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/460197
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Wojciech Malikowski 2019-07-02 12:32:45 -04:00 committed by Ben Walker
parent a1de2fe007
commit 4c5282bcf7
1 changed files with 20 additions and 0 deletions
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20
lib/vmd/vmd.c
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@ -335,6 +335,7 @@ vmd_alloc_dev(struct vmd_pci_bus *bus, uint32_t devfn)
struct pci_header volatile *header;
uint8_t header_type;
uint32_t rev_class;
uint32_t reg __attribute__((unused));
header = (struct pci_header * volatile)(bus->vmd->cfg_vaddr +
CONFIG_OFFSET_ADDR(bus->bus_number, devfn, 0, 0));
@ -367,14 +368,33 @@ vmd_alloc_dev(struct vmd_pci_bus *bus, uint32_t devfn)
if (header_type == PCI_HEADER_TYPE_BRIDGE) {
dev->header->one.mem_base = 0xfff0;
/*
* Writes to the pci config space are posted writes.
* To ensure transaction reaches its destination
* before another write is posted, an immediate read
* of the written value should be performed.
*/
reg = dev->header->one.mem_base;
dev->header->one.mem_limit = 0x0;
reg = dev->header->one.mem_limit;
dev->header->one.prefetch_base = 0x0;
reg = dev->header->one.prefetch_base;
dev->header->one.prefetch_limit = 0x0;
reg = dev->header->one.prefetch_limit;
dev->header->one.prefetch_base_upper = 0x0;
reg = dev->header->one.prefetch_base_upper;
dev->header->one.prefetch_limit_upper = 0x0;
reg = dev->header->one.prefetch_limit_upper;
dev->header->one.io_base_upper = 0x0;
reg = dev->header->one.io_base_upper;
dev->header->one.io_limit_upper = 0x0;
reg = dev->header->one.io_limit_upper;
dev->header->one.primary = 0;
reg = dev->header->one.primary;
dev->header->one.secondary = 0;
reg = dev->header->one.secondary;
dev->header->one.subordinate = 0;
reg = dev->header->one.subordinate;
}
vmd_read_config_space(dev);