1 // SPDX-License-Identifier: GPL-2.0
31 	if (ups && ups->ptm_cap)  in pci_upstream_ptm()
54 	dev->ptm_cap = ptm;  in pci_ptm_init()
58 	dev->ptm_granularity = FIELD_GET(PCI_PTM_GRANULARITY_MASK, cap);  in pci_ptm_init()
68 		if (ups->ptm_granularity == 0)  in pci_ptm_init()
69 			dev->ptm_granularity = 0;  in pci_ptm_init()
70 		else if (ups->ptm_granularity > dev->ptm_granularity)  in pci_ptm_init()
71 			dev->ptm_granularity = ups->ptm_granularity;  in pci_ptm_init()
73 		dev->ptm_root = 1;  in pci_ptm_init()
81 		dev->ptm_granularity = 0;  in pci_ptm_init()
91 	u16 ptm = dev->ptm_cap;  in pci_save_ptm_state()
102 	cap = (u32 *)&save_state->cap.data[0];  in pci_save_ptm_state()
108 	u16 ptm = dev->ptm_cap;  in pci_restore_ptm_state()
119 	cap = (u32 *)&save_state->cap.data[0];  in pci_restore_ptm_state()
126 	u16 ptm = dev->ptm_cap;  in __pci_enable_ptm()
131 		return -EINVAL;  in __pci_enable_ptm()
141 	if (!dev->ptm_root) {  in __pci_enable_ptm()
143 		if (!ups || !ups->ptm_enabled)  in __pci_enable_ptm()
144 			return -EINVAL;  in __pci_enable_ptm()
151 	ctrl |= FIELD_PREP(PCI_PTM_GRANULARITY_MASK, dev->ptm_granularity);  in __pci_enable_ptm()
152 	if (dev->ptm_root)  in __pci_enable_ptm()
160  * pci_enable_ptm() - Enable Precision Time Measurement
165  * @granularity is non-NULL, return the Effective Granularity.
167  * Return: zero if successful, or -EINVAL if @dev lacks a PTM Capability or
168  * is not a PTM Root and lacks an upstream path of PTM-enabled devices.
179 	dev->ptm_enabled = 1;  in pci_enable_ptm()
182 		*granularity = dev->ptm_granularity;  in pci_enable_ptm()
184 	switch (dev->ptm_granularity) {  in pci_enable_ptm()
193 			 dev->ptm_granularity);  in pci_enable_ptm()
197 		 dev->ptm_root ? " (root)" : "", clock_desc);  in pci_enable_ptm()
205 	u16 ptm = dev->ptm_cap;  in __pci_disable_ptm()
217  * pci_disable_ptm() - Disable Precision Time Measurement
224 	if (dev->ptm_enabled) {  in pci_disable_ptm()
226 		dev->ptm_enabled = 0;  in pci_disable_ptm()
232  * Disable PTM, but preserve dev->ptm_enabled so we silently re-enable it on
237 	if (dev->ptm_enabled)  in pci_suspend_ptm()
241 /* If PTM was enabled before suspend, re-enable it when resuming */
244 	if (dev->ptm_enabled)  in pci_resume_ptm()
253 	return dev->ptm_enabled;  in pcie_ptm_enabled()
261 	struct pci_ptm_debugfs *ptm_debugfs = file->private_data;  in context_update_write()
264 	u8 mode;  in context_update_write()  local
266 	if (!ptm_debugfs->ops->context_update_write)  in context_update_write()
267 		return -EOPNOTSUPP;  in context_update_write()
270 		return -EINVAL;  in context_update_write()
274 		return -EFAULT;  in context_update_write()
279 		mode = PCIE_PTM_CONTEXT_UPDATE_AUTO;  in context_update_write()
281 		mode = PCIE_PTM_CONTEXT_UPDATE_MANUAL;  in context_update_write()
283 		return -EINVAL;  in context_update_write()
285 	mutex_lock(&ptm_debugfs->lock);  in context_update_write()
286 	ret = ptm_debugfs->ops->context_update_write(ptm_debugfs->pdata, mode);  in context_update_write()
287 	mutex_unlock(&ptm_debugfs->lock);  in context_update_write()
297 	struct pci_ptm_debugfs *ptm_debugfs = file->private_data;  in context_update_read()
300 	u8 mode;  in context_update_read()  local
302 	if (!ptm_debugfs->ops->context_update_read)  in context_update_read()
303 		return -EOPNOTSUPP;  in context_update_read()
305 	mutex_lock(&ptm_debugfs->lock);  in context_update_read()
306 	ptm_debugfs->ops->context_update_read(ptm_debugfs->pdata, &mode);  in context_update_read()
307 	mutex_unlock(&ptm_debugfs->lock);  in context_update_read()
309 	if (mode == PCIE_PTM_CONTEXT_UPDATE_AUTO)  in context_update_read()
329 	if (!ptm_debugfs->ops->context_valid_read)  in context_valid_get()
330 		return -EOPNOTSUPP;  in context_valid_get()
332 	mutex_lock(&ptm_debugfs->lock);  in context_valid_get()
333 	ret = ptm_debugfs->ops->context_valid_read(ptm_debugfs->pdata, &valid);  in context_valid_get()
334 	mutex_unlock(&ptm_debugfs->lock);  in context_valid_get()
348 	if (!ptm_debugfs->ops->context_valid_write)  in context_valid_set()
349 		return -EOPNOTSUPP;  in context_valid_set()
351 	mutex_lock(&ptm_debugfs->lock);  in context_valid_set()
352 	ret = ptm_debugfs->ops->context_valid_write(ptm_debugfs->pdata, !!val);  in context_valid_set()
353 	mutex_unlock(&ptm_debugfs->lock);  in context_valid_set()
367 	if (!ptm_debugfs->ops->local_clock_read)  in local_clock_get()
368 		return -EOPNOTSUPP;  in local_clock_get()
370 	ret = ptm_debugfs->ops->local_clock_read(ptm_debugfs->pdata, &clock);  in local_clock_get()
387 	if (!ptm_debugfs->ops->master_clock_read)  in master_clock_get()
388 		return -EOPNOTSUPP;  in master_clock_get()
390 	ret = ptm_debugfs->ops->master_clock_read(ptm_debugfs->pdata, &clock);  in master_clock_get()
407 	if (!ptm_debugfs->ops->t1_read)  in t1_get()
408 		return -EOPNOTSUPP;  in t1_get()
410 	ret = ptm_debugfs->ops->t1_read(ptm_debugfs->pdata, &clock);  in t1_get()
427 	if (!ptm_debugfs->ops->t2_read)  in t2_get()
428 		return -EOPNOTSUPP;  in t2_get()
430 	ret = ptm_debugfs->ops->t2_read(ptm_debugfs->pdata, &clock);  in t2_get()
447 	if (!ptm_debugfs->ops->t3_read)  in t3_get()
448 		return -EOPNOTSUPP;  in t3_get()
450 	ret = ptm_debugfs->ops->t3_read(ptm_debugfs->pdata, &clock);  in t3_get()
467 	if (!ptm_debugfs->ops->t4_read)  in t4_get()
468 		return -EOPNOTSUPP;  in t4_get()
470 	ret = ptm_debugfs->ops->t4_read(ptm_debugfs->pdata, &clock);  in t4_get()
481 #define pcie_ptm_create_debugfs_file(pdata, mode, attr)			\  argument
483 		if (ops->attr##_visible && ops->attr##_visible(pdata))	\
484 			debugfs_create_file(#attr, mode, ptm_debugfs->debugfs, \
489  * pcie_ptm_create_debugfs() - Create debugfs entries for the PTM context
490  * @dev: PTM capable component device
491  * @pdata: Private data of the PTM capable component device
494  * Create debugfs entries for exposing the PTM context of the PTM capable
507 	if (!ops->check_capability)  in pcie_ptm_create_debugfs()
511 	ret = ops->check_capability(pdata);  in pcie_ptm_create_debugfs()
525 	ptm_debugfs->debugfs = debugfs_create_dir(dirname, NULL);  in pcie_ptm_create_debugfs()
526 	ptm_debugfs->pdata = pdata;  in pcie_ptm_create_debugfs()
527 	ptm_debugfs->ops = ops;  in pcie_ptm_create_debugfs()
528 	mutex_init(&ptm_debugfs->lock);  in pcie_ptm_create_debugfs()
544  * pcie_ptm_destroy_debugfs() - Destroy debugfs entries for the PTM context
552 	mutex_destroy(&ptm_debugfs->lock);  in pcie_ptm_destroy_debugfs()
553 	debugfs_remove_recursive(ptm_debugfs->debugfs);  in pcie_ptm_destroy_debugfs()