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| author |  Bjorn Helgaas <bhelgaas@google.com>
| 2024-05-16 18:14:09 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com>
| 2024-05-16 18:14:09 -0500 |
| commit | d539117564bc5e504731db2f057075a323e11637 (patch) | |
| tree | d210eb4f11aed327110060afd34a956ebb664f61 /drivers/pci | |
| parent | Merge branch 'pci/cxl' (diff) | |
| parent | PCI/DOE: Support discovery version 2 (diff) | |
| download | linux-d539117564bc5e504731db2f057075a323e11637.tar.gz linux-d539117564bc5e504731db2f057075a323e11637.tar.bz2 linux-d539117564bc5e504731db2f057075a323e11637.zip | |
Merge branch 'pci/doe'
- Add support for DOE Discovery version 2 (Alexey Kardashevskiy)
* pci/doe:
PCI/DOE: Support discovery version 2
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/doe.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/pci/doe.c b/drivers/pci/doe.c index e3aab5edaf70..652d63df9d22 100644 --- a/drivers/pci/doe.c +++ b/drivers/pci/doe.c @@ -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; |