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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
authored by
Yishai Hadas
and committed by
Leon Romanovsky
0a61ec9c
9a0048e0
+7
-5
+6
-5
drivers/pci/tph.c
+6
-5
drivers/pci/tph.c
···
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* Return the size of ST table. If ST table is not in TPH Requester Extended
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* Capability space, return 0. Otherwise return the ST Table Size + 1.
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*/
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-
static u16 get_st_table_size(struct pci_dev *pdev)
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+
u16 pcie_tph_get_st_table_size(struct pci_dev *pdev)
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{
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u32 reg;
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u32 loc;
···
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return FIELD_GET(PCI_TPH_CAP_ST_MASK, reg) + 1;
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}
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+
EXPORT_SYMBOL(pcie_tph_get_st_table_size);
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/* Return device's Root Port completer capability */
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static u8 get_rp_completer_type(struct pci_dev *pdev)
···
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int offset;
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/* Check if index is out of bound */
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st_table_size = get_st_table_size(pdev);
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st_table_size = pcie_tph_get_st_table_size(pdev);
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if (index >= st_table_size)
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return -ENXIO;
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···
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pci_write_config_dword(pdev, pdev->tph_cap + PCI_TPH_CTRL, *cap++);
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st_entry = (u16 *)cap;
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offset = PCI_TPH_BASE_SIZEOF;
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num_entries = get_st_table_size(pdev);
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num_entries = pcie_tph_get_st_table_size(pdev);
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for (i = 0; i < num_entries; i++) {
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pci_write_config_word(pdev, pdev->tph_cap + offset,
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*st_entry++);
···
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/* Save all ST entries in extended capability structure */
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st_entry = (u16 *)cap;
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offset = PCI_TPH_BASE_SIZEOF;
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num_entries = get_st_table_size(pdev);
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+
num_entries = pcie_tph_get_st_table_size(pdev);
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for (i = 0; i < num_entries; i++) {
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pci_read_config_word(pdev, pdev->tph_cap + offset,
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st_entry++);
···
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if (!pdev->tph_cap)
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return;
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-
num_entries = get_st_table_size(pdev);
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+
num_entries = pcie_tph_get_st_table_size(pdev);
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save_size = sizeof(u32) + num_entries * sizeof(u16);
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pci_add_ext_cap_save_buffer(pdev, PCI_EXT_CAP_ID_TPH, save_size);
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}
+1
include/linux/pci-tph.h
+1
include/linux/pci-tph.h
···
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unsigned int cpu_uid, u16 *tag);
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void pcie_disable_tph(struct pci_dev *pdev);
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int pcie_enable_tph(struct pci_dev *pdev, int mode);
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+
u16 pcie_tph_get_st_table_size(struct pci_dev *pdev);
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#else
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static inline int pcie_tph_set_st_entry(struct pci_dev *pdev,
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unsigned int index, u16 tag)