Lines Matching defs:dev
16 static struct pci_dev *pci_upstream_ptm(struct pci_dev *dev)
18 struct pci_dev *ups = pci_upstream_bridge(dev);
39 void pci_ptm_init(struct pci_dev *dev)
45 if (!pci_is_pcie(dev))
48 ptm = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_PTM);
52 dev->ptm_cap = ptm;
53 pci_add_ext_cap_save_buffer(dev, PCI_EXT_CAP_ID_PTM, sizeof(u32));
55 pci_read_config_dword(dev, ptm + PCI_PTM_CAP, &cap);
56 dev->ptm_granularity = (cap & PCI_PTM_GRANULARITY_MASK) >> 8;
64 ups = pci_upstream_ptm(dev);
67 dev->ptm_granularity = 0;
68 else if (ups->ptm_granularity > dev->ptm_granularity)
69 dev->ptm_granularity = ups->ptm_granularity;
71 dev->ptm_root = 1;
72 } else if (pci_pcie_type(dev) == PCI_EXP_TYPE_RC_END) {
79 dev->ptm_granularity = 0;
82 if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT ||
83 pci_pcie_type(dev) == PCI_EXP_TYPE_UPSTREAM)
84 pci_enable_ptm(dev, NULL);
87 void pci_save_ptm_state(struct pci_dev *dev)
89 u16 ptm = dev->ptm_cap;
96 save_state = pci_find_saved_ext_cap(dev, PCI_EXT_CAP_ID_PTM);
101 pci_read_config_dword(dev, ptm + PCI_PTM_CTRL, cap);
104 void pci_restore_ptm_state(struct pci_dev *dev)
106 u16 ptm = dev->ptm_cap;
113 save_state = pci_find_saved_ext_cap(dev, PCI_EXT_CAP_ID_PTM);
118 pci_write_config_dword(dev, ptm + PCI_PTM_CTRL, *cap);
122 static int __pci_enable_ptm(struct pci_dev *dev)
124 u16 ptm = dev->ptm_cap;
139 if (!dev->ptm_root) {
140 ups = pci_upstream_ptm(dev);
145 pci_read_config_dword(dev, ptm + PCI_PTM_CTRL, &ctrl);
149 ctrl |= dev->ptm_granularity << 8;
150 if (dev->ptm_root)
153 pci_write_config_dword(dev, ptm + PCI_PTM_CTRL, ctrl);
159 * @dev: PCI device
162 * Enable Precision Time Measurement for @dev. If successful and
165 * Return: zero if successful, or -EINVAL if @dev lacks a PTM Capability or
168 int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
173 rc = __pci_enable_ptm(dev);
177 dev->ptm_enabled = 1;
180 *granularity = dev->ptm_granularity;
182 switch (dev->ptm_granularity) {
191 dev->ptm_granularity);
194 pci_info(dev, "PTM enabled%s, %s granularity\n",
195 dev->ptm_root ? " (root)" : "", clock_desc);
201 static void __pci_disable_ptm(struct pci_dev *dev)
203 u16 ptm = dev->ptm_cap;
209 pci_read_config_dword(dev, ptm + PCI_PTM_CTRL, &ctrl);
211 pci_write_config_dword(dev, ptm + PCI_PTM_CTRL, ctrl);
216 * @dev: PCI device
218 * Disable Precision Time Measurement for @dev.
220 void pci_disable_ptm(struct pci_dev *dev)
222 if (dev->ptm_enabled) {
223 __pci_disable_ptm(dev);
224 dev->ptm_enabled = 0;
230 * Disable PTM, but preserve dev->ptm_enabled so we silently re-enable it on
233 void pci_suspend_ptm(struct pci_dev *dev)
235 if (dev->ptm_enabled)
236 __pci_disable_ptm(dev);
240 void pci_resume_ptm(struct pci_dev *dev)
242 if (dev->ptm_enabled)
243 __pci_enable_ptm(dev);
246 bool pcie_ptm_enabled(struct pci_dev *dev)
248 if (!dev)
251 return dev->ptm_enabled;