superrob1500
/
mirror-linux
mirror of https://github.com/torvalds/linux
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

PCI/TPH: Expose pcie_tph_get_st_table_size() 

Expose pcie_tph_get_st_table_size() to be used by drivers as will be
done in the next patch from the series.

Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/9ae851e0ee42cc56d2a30276e116b65091030ceb.1752752567.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
pull/1311/head
Yishai Hadas 2025-07-17 15:17:25 +03:00 committed by Leon Romanovsky
parent 9a0048e0ae
commit 0a61ec9cc5
2 changed files with 7 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/pci/tph.c
View File

@ -168,7 +168,7 @@ static u32 get_st_table_loc(struct pci_dev *pdev)
* Return the size of ST table. If ST table is not in TPH Requester Extended
* Capability space, return 0. Otherwise return the ST Table Size + 1.
*/
static u16 get_st_table_size(struct pci_dev *pdev)
u16 pcie_tph_get_st_table_size(struct pci_dev *pdev)
{
u32 reg;
u32 loc;
@ -185,6 +185,7 @@ static u16 get_st_table_size(struct pci_dev *pdev)
return FIELD_GET(PCI_TPH_CAP_ST_MASK, reg) + 1;
}
EXPORT_SYMBOL(pcie_tph_get_st_table_size);
/* Return device's Root Port completer capability */
static u8 get_rp_completer_type(struct pci_dev *pdev)
@ -211,7 +212,7 @@ static int write_tag_to_st_table(struct pci_dev *pdev, int index, u16 tag)
int offset;
/* Check if index is out of bound */
st_table_size = get_st_table_size(pdev);
st_table_size = pcie_tph_get_st_table_size(pdev);
if (index >= st_table_size)
return -ENXIO;
@ -443,7 +444,7 @@ void pci_restore_tph_state(struct pci_dev *pdev)
pci_write_config_dword(pdev, pdev->tph_cap + PCI_TPH_CTRL, *cap++);
st_entry = (u16 *)cap;
offset = PCI_TPH_BASE_SIZEOF;
num_entries = get_st_table_size(pdev);
num_entries = pcie_tph_get_st_table_size(pdev);
for (i = 0; i < num_entries; i++) {
pci_write_config_word(pdev, pdev->tph_cap + offset,
*st_entry++);
@ -475,7 +476,7 @@ void pci_save_tph_state(struct pci_dev *pdev)
/* Save all ST entries in extended capability structure */
st_entry = (u16 *)cap;
offset = PCI_TPH_BASE_SIZEOF;
num_entries = get_st_table_size(pdev);
num_entries = pcie_tph_get_st_table_size(pdev);
for (i = 0; i < num_entries; i++) {
pci_read_config_word(pdev, pdev->tph_cap + offset,
st_entry++);
@ -499,7 +500,7 @@ void pci_tph_init(struct pci_dev *pdev)
if (!pdev->tph_cap)
return;
num_entries = get_st_table_size(pdev);
num_entries = pcie_tph_get_st_table_size(pdev);
save_size = sizeof(u32) + num_entries * sizeof(u16);
pci_add_ext_cap_save_buffer(pdev, PCI_EXT_CAP_ID_TPH, save_size);
}

1
include/linux/pci-tph.h
View File

@ -28,6 +28,7 @@ int pcie_tph_get_cpu_st(struct pci_dev *dev,
unsigned int cpu_uid, u16 *tag);
void pcie_disable_tph(struct pci_dev *pdev);
int pcie_enable_tph(struct pci_dev *pdev, int mode);
u16 pcie_tph_get_st_table_size(struct pci_dev *pdev);
#else
static inline int pcie_tph_set_st_entry(struct pci_dev *pdev,
unsigned int index, u16 tag)