1 // SPDX-License-Identifier: GPL-2.0
3  * PCIe TLP Log handling
17  * aer_tlp_log_len - Calculate AER Capability TLP Header/Prefix Log length
18  * @dev: PCIe device
30 		dev->eetlp_prefix_max : 0);  in aer_tlp_log_len()
35  * dpc_tlp_log_len - Calculate DPC RP PIO TLP Header/Prefix Log length
36  * @dev: PCIe device
43 	if (dev->dpc_rp_log_size >= PCIE_STD_NUM_TLP_HEADERLOG + 1)  in dpc_tlp_log_len()
44 		return dev->dpc_rp_log_size - 1;  in dpc_tlp_log_len()
46 	return dev->dpc_rp_log_size;  in dpc_tlp_log_len()
51  * pcie_read_tlp_log - read TLP Header Log
52  * @dev: PCIe device
69 	if (tlp_len > ARRAY_SIZE(log->dw))  in pcie_read_tlp_log()
70 		tlp_len = ARRAY_SIZE(log->dw);  in pcie_read_tlp_log()
78 			off = where2 + (i - PCIE_STD_NUM_TLP_HEADERLOG) * 4;  in pcie_read_tlp_log()
80 		ret = pci_read_config_dword(dev, off, &log->dw[i]);  in pcie_read_tlp_log()
86 	 * Hard-code non-Flit mode to 4 DWORDs, for now. The exact length  in pcie_read_tlp_log()
89 	log->header_len = flit ? tlp_len : 4;  in pcie_read_tlp_log()
90 	log->flit = flit;  in pcie_read_tlp_log()
95 #define EE_PREFIX_STR " E-E Prefixes:"
98  * pcie_print_tlp_log - Print TLP Header / Prefix Log contents
99  * @dev: PCIe device
108 	/* EE_PREFIX_STR fits the extended DW space needed for the Flit mode */  in pcie_print_tlp_log()
114 			log->dw[0], log->dw[1], log->dw[2], log->dw[3]);  in pcie_print_tlp_log()
116 	if (log->flit) {  in pcie_print_tlp_log()
117 		for (i = PCIE_STD_NUM_TLP_HEADERLOG; i < log->header_len; i++) {  in pcie_print_tlp_log()
118 			len += scnprintf(buf + len, sizeof(buf) - len,  in pcie_print_tlp_log()
119 					 " %#010x", log->dw[i]);  in pcie_print_tlp_log()
122 		if (log->prefix[0])  in pcie_print_tlp_log()
123 			len += scnprintf(buf + len, sizeof(buf) - len,  in pcie_print_tlp_log()
125 		for (i = 0; i < ARRAY_SIZE(log->prefix); i++) {  in pcie_print_tlp_log()
126 			if (!log->prefix[i])  in pcie_print_tlp_log()
128 			len += scnprintf(buf + len, sizeof(buf) - len,  in pcie_print_tlp_log()
129 					 " %#010x", log->prefix[i]);  in pcie_print_tlp_log()
134 		log->flit ? " (Flit)" : "", buf);  in pcie_print_tlp_log()