pci/pcie/dpc.c

1 // SPDX-License-Identifier: GPL-2.0
58 	cap = (u16 *)&save_state->cap.data[0];  in pci_save_dpc_state()
59 	pci_read_config_word(dev, dev->dpc_cap + PCI_EXP_DPC_CTL, cap);  in pci_save_dpc_state()
74 	cap = (u16 *)&save_state->cap.data[0];  in pci_restore_dpc_state()
75 	pci_write_config_word(dev, dev->dpc_cap + PCI_EXP_DPC_CTL, *cap);  in pci_restore_dpc_state()
85 	pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_STATUS, &status);  in dpc_completed()
89 	if (test_bit(PCI_DPC_RECOVERING, &pdev->priv_flags))  in dpc_completed()
96  * pci_dpc_recovered - whether DPC triggered and has recovered successfully
107 	if (!pdev->dpc_cap)  in pci_dpc_recovered()
114 	host = pci_find_host_bridge(pdev->bus);  in pci_dpc_recovered()
115 	if (!host->native_dpc && !IS_ENABLED(CONFIG_PCIE_EDR))  in pci_dpc_recovered()
126 	return test_and_clear_bit(PCI_DPC_RECOVERED, &pdev->priv_flags);  in pci_dpc_recovered()
133 	u16 cap = pdev->dpc_cap, status;  in dpc_wait_rp_inactive()
143 		return -EBUSY;  in dpc_wait_rp_inactive()
153 	set_bit(PCI_DPC_RECOVERING, &pdev->priv_flags);  in dpc_reset_link()
159 	cap = pdev->dpc_cap;  in dpc_reset_link()
168 	if (pdev->dpc_rp_extensions && dpc_wait_rp_inactive(pdev)) {  in dpc_reset_link()
169 		clear_bit(PCI_DPC_RECOVERED, &pdev->priv_flags);  in dpc_reset_link()
178 		clear_bit(PCI_DPC_RECOVERED, &pdev->priv_flags);  in dpc_reset_link()
181 		set_bit(PCI_DPC_RECOVERED, &pdev->priv_flags);  in dpc_reset_link()
185 	clear_bit(PCI_DPC_RECOVERING, &pdev->priv_flags);  in dpc_reset_link()
192 	u16 cap = pdev->dpc_cap, dpc_status, first_error;  in dpc_process_rp_pio_error()
204 	pci_err(pdev, "RP PIO severity=%#010x, syserror=%#010x, exception=%#010x\n",  in dpc_process_rp_pio_error()
217 	if (pdev->dpc_rp_log_size < 4)  in dpc_process_rp_pio_error()
230 	if (pdev->dpc_rp_log_size < 5)  in dpc_process_rp_pio_error()
233 	pci_err(pdev, "RP PIO ImpSpec Log %#010x\n", log);  in dpc_process_rp_pio_error()
235 	for (i = 0; i < pdev->dpc_rp_log_size - 5; i++) {  in dpc_process_rp_pio_error()
247 	int pos = dev->aer_cap;  in dpc_get_aer_uncorrect_severity()
259 		info->severity = AER_FATAL;  in dpc_get_aer_uncorrect_severity()
261 		info->severity = AER_NONFATAL;  in dpc_get_aer_uncorrect_severity()
268 	u16 cap = pdev->dpc_cap, status, source, reason, ext_reason;  in dpc_process_error()
287 		 "RP PIO error" :  in dpc_process_error()
292 	/* show RP PIO error detail information */  in dpc_process_error()
293 	if (pdev->dpc_rp_extensions &&  in dpc_process_error()
321 	u16 cap = pdev->dpc_cap, status;  in dpc_irq()
339 	pdev->dpc_cap = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DPC);  in pci_dpc_init()
340 	if (!pdev->dpc_cap)  in pci_dpc_init()
343 	pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CAP, &cap);  in pci_dpc_init()
347 	pdev->dpc_rp_extensions = true;  in pci_dpc_init()
350 	if (!pdev->dpc_rp_log_size) {  in pci_dpc_init()
351 		pdev->dpc_rp_log_size =  in pci_dpc_init()
353 		if (pdev->dpc_rp_log_size < 4 || pdev->dpc_rp_log_size > 9) {  in pci_dpc_init()
354 			pci_err(pdev, "RP PIO log size %u is invalid\n",  in pci_dpc_init()
355 				pdev->dpc_rp_log_size);  in pci_dpc_init()
356 			pdev->dpc_rp_log_size = 0;  in pci_dpc_init()
361 #define FLAG(x, y) (((x) & (y)) ? '+' : '-')  argument
364 	struct pci_dev *pdev = dev->port;  in dpc_probe()
365 	struct device *device = &dev->device;  in dpc_probe()
370 		return -ENOTSUPP;  in dpc_probe()
372 	status = devm_request_threaded_irq(device, dev->irq, dpc_irq,  in dpc_probe()
374 					   "pcie-dpc", pdev);  in dpc_probe()
376 		pci_warn(pdev, "request IRQ%d failed: %d\n", dev->irq,  in dpc_probe()
381 	pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CAP, &cap);  in dpc_probe()
383 	pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl);  in dpc_probe()
386 	pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl);  in dpc_probe()
388 	pci_info(pdev, "enabled with IRQ %d\n", dev->irq);  in dpc_probe()
389 …pci_info(pdev, "error containment capabilities: Int Msg #%d, RPExt%c PoisonedTLP%c SwTrigger%c RP …  in dpc_probe()
392 		 FLAG(cap, PCI_EXP_DPC_CAP_SW_TRIGGER), pdev->dpc_rp_log_size,  in dpc_probe()
401 	struct pci_dev *pdev = dev->port;  in dpc_remove()
404 	pci_read_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, &ctl);  in dpc_remove()
406 	pci_write_config_word(pdev, pdev->dpc_cap + PCI_EXP_DPC_CTL, ctl);  in dpc_remove()