diff options
| author | Basavaraj Natikar <Basavaraj.Natikar@amd.com> | 2025-09-18 13:04:47 +0530 |
|---|---|---|
| committer | Jon Mason <jdmason@kudzu.us> | 2025-09-22 09:35:20 -0400 |
| commit | f0c260f175510e7e8a518e8e09bd57a96188f108 (patch) | |
| tree | 53ef2602cf4ab55a67fb6ef27d0a4bb9a39d602d | |
| parent | 8f5ae30d69d7543eee0d70083daf4de8fe15d585 (diff) | |
ntb_hw_amd: Update amd_ntb_get_link_status to support latest generation secondary topology
In the NTB secondary topology configuration of the latest generation,
the device behaves like an endpoint. Hence, add endpoint support and
update amd_ntb_get_link_status to accommodate endpoint devices.
Co-developed-by: Sanath S <Sanath.S@amd.com>
Signed-off-by: Sanath S <Sanath.S@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
| -rw-r--r-- | drivers/ntb/hw/amd/ntb_hw_amd.c | 18 | ||||
| -rw-r--r-- | drivers/ntb/hw/amd/ntb_hw_amd.h | 1 |
2 files changed, 18 insertions, 1 deletions
diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.c b/drivers/ntb/hw/amd/ntb_hw_amd.c index 63ceed89b62e..1a163596ddf5 100644 --- a/drivers/ntb/hw/amd/ntb_hw_amd.c +++ b/drivers/ntb/hw/amd/ntb_hw_amd.c @@ -197,13 +197,22 @@ static int amd_ntb_mw_set_trans(struct ntb_dev *ntb, int pidx, int idx, static int amd_ntb_get_link_status(struct amd_ntb_dev *ndev) { - struct pci_dev *pdev = NULL; + struct pci_dev *pdev = ndev->ntb.pdev; struct pci_dev *pci_swds = NULL; struct pci_dev *pci_swus = NULL; u32 stat; int rc; if (ndev->ntb.topo == NTB_TOPO_SEC) { + if (ndev->dev_data->is_endpoint) { + rc = pcie_capability_read_dword(pdev, PCI_EXP_LNKCTL, &stat); + if (rc) + return rc; + + ndev->lnk_sta = stat; + return 0; + } + /* Locate the pointer to Downstream Switch for this device */ pci_swds = pci_upstream_bridge(ndev->ntb.pdev); if (pci_swds) { @@ -1311,6 +1320,11 @@ static const struct ntb_dev_data dev_data[] = { .mw_count = 2, .mw_idx = 2, }, + { /* for device 0x17d7 */ + .mw_count = 2, + .mw_idx = 2, + .is_endpoint = true, + }, }; static const struct pci_device_id amd_ntb_pci_tbl[] = { @@ -1319,6 +1333,8 @@ static const struct pci_device_id amd_ntb_pci_tbl[] = { { PCI_VDEVICE(AMD, 0x14c0), (kernel_ulong_t)&dev_data[1] }, { PCI_VDEVICE(AMD, 0x14c3), (kernel_ulong_t)&dev_data[1] }, { PCI_VDEVICE(AMD, 0x155a), (kernel_ulong_t)&dev_data[1] }, + { PCI_VDEVICE(AMD, 0x17d4), (kernel_ulong_t)&dev_data[1] }, + { PCI_VDEVICE(AMD, 0x17d7), (kernel_ulong_t)&dev_data[2] }, { PCI_VDEVICE(HYGON, 0x145b), (kernel_ulong_t)&dev_data[0] }, { 0, } }; diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.h b/drivers/ntb/hw/amd/ntb_hw_amd.h index 5f337b1572a0..e8c3165fa38b 100644 --- a/drivers/ntb/hw/amd/ntb_hw_amd.h +++ b/drivers/ntb/hw/amd/ntb_hw_amd.h @@ -168,6 +168,7 @@ enum { struct ntb_dev_data { const unsigned char mw_count; const unsigned int mw_idx; + const bool is_endpoint; }; struct amd_ntb_dev; |