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Merge branch 'pci/doe'

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- Add support for DOE Discovery version 2 (Alexey Kardashevskiy)

* pci/doe:
  PCI/DOE: Support discovery version 2
This commit is contained in:
Bjorn Helgaas 2024-05-16 18:14:09 -05:00
commit d539117564
2 changed files with 10 additions and 3 deletions
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12
drivers/pci/doe.c
View File

@ -383,11 +383,13 @@ static void pci_doe_task_complete(struct pci_doe_task *task)
complete(task->private);
}
static int pci_doe_discovery(struct pci_doe_mb *doe_mb, u8 *index, u16 *vid,
static int pci_doe_discovery(struct pci_doe_mb *doe_mb, u8 capver, u8 *index, u16 *vid,
u8 *protocol)
{
u32 request_pl = FIELD_PREP(PCI_DOE_DATA_OBJECT_DISC_REQ_3_INDEX,
*index);
*index) |
FIELD_PREP(PCI_DOE_DATA_OBJECT_DISC_REQ_3_VER,
(capver >= 2) ? 2 : 0);
__le32 request_pl_le = cpu_to_le32(request_pl);
__le32 response_pl_le;
u32 response_pl;
@ -421,13 +423,17 @@ static int pci_doe_cache_protocols(struct pci_doe_mb *doe_mb)
{
u8 index = 0;
u8 xa_idx = 0;
u32 hdr = 0;
pci_read_config_dword(doe_mb->pdev, doe_mb->cap_offset, &hdr);
do {
int rc;
u16 vid;
u8 prot;
rc = pci_doe_discovery(doe_mb, &index, &vid, &prot);
rc = pci_doe_discovery(doe_mb, PCI_EXT_CAP_VER(hdr), &index,
&vid, &prot);
if (rc)
return rc;

1
include/uapi/linux/pci_regs.h
View File

@ -1144,6 +1144,7 @@
#define PCI_DOE_DATA_OBJECT_HEADER_2_LENGTH 0x0003ffff
#define PCI_DOE_DATA_OBJECT_DISC_REQ_3_INDEX 0x000000ff
#define PCI_DOE_DATA_OBJECT_DISC_REQ_3_VER 0x0000ff00
#define PCI_DOE_DATA_OBJECT_DISC_RSP_3_VID 0x0000ffff
#define PCI_DOE_DATA_OBJECT_DISC_RSP_3_PROTOCOL 0x00ff0000
#define PCI_DOE_DATA_OBJECT_DISC_RSP_3_NEXT_INDEX 0xff000000