1 // SPDX-License-Identifier: GPL-2.0
18 #define ICL_LC_MAILBOX_TIMEOUT	500 /* ms */
27 	struct tb *tb = pci_get_drvdata(nhi->pdev);  in icl_nhi_is_device_connected()
30 	ret = device_for_each_child(&tb->root_switch->dev, NULL,  in icl_nhi_is_device_connected()
51 	pci_read_config_dword(nhi->pdev, VS_CAP_22, &vs_cap);  in icl_nhi_force_power()
59 	pci_write_config_dword(nhi->pdev, VS_CAP_22, vs_cap);  in icl_nhi_force_power()
67 			pci_read_config_dword(nhi->pdev, VS_CAP_9, &val);  in icl_nhi_force_power()
71 		} while (--retries);  in icl_nhi_force_power()
73 		return -ETIMEDOUT;  in icl_nhi_force_power()
79 static void icl_nhi_lc_mailbox_cmd(struct tb_nhi *nhi, enum icl_lc_mailbox_cmd cmd)  in icl_nhi_lc_mailbox_cmd()  argument
83 	data = (cmd << VS_CAP_19_CMD_SHIFT) & VS_CAP_19_CMD_MASK;  in icl_nhi_lc_mailbox_cmd()
84 	pci_write_config_dword(nhi->pdev, VS_CAP_19, data | VS_CAP_19_VALID);  in icl_nhi_lc_mailbox_cmd()
87 static int icl_nhi_lc_mailbox_cmd_complete(struct tb_nhi *nhi, int timeout)  in icl_nhi_lc_mailbox_cmd_complete()  argument
92 	if (!timeout)  in icl_nhi_lc_mailbox_cmd_complete()
95 	end = jiffies + msecs_to_jiffies(timeout);  in icl_nhi_lc_mailbox_cmd_complete()
97 		pci_read_config_dword(nhi->pdev, VS_CAP_18, &data);  in icl_nhi_lc_mailbox_cmd_complete()
103 	return -ETIMEDOUT;  in icl_nhi_lc_mailbox_cmd_complete()
107 	pci_write_config_dword(nhi->pdev, VS_CAP_19, 0);  in icl_nhi_lc_mailbox_cmd_complete()
115 	pci_read_config_dword(nhi->pdev, VS_CAP_16, &max_ltr);  in icl_nhi_set_ltr()
117 	/* Program the same value for both snoop and no-snoop */  in icl_nhi_set_ltr()
119 	pci_write_config_dword(nhi->pdev, VS_CAP_15, ltr);  in icl_nhi_set_ltr()
124 	struct tb *tb = pci_get_drvdata(nhi->pdev);  in icl_nhi_suspend()
130 	if (tb_switch_is_icm(tb->root_switch)) {  in icl_nhi_suspend()
147 	struct tb *tb = pci_get_drvdata(nhi->pdev);  in icl_nhi_suspend_noirq()
148 	enum icl_lc_mailbox_cmd cmd;  in icl_nhi_suspend_noirq()  local
153 	if (!tb_switch_is_icm(tb->root_switch))  in icl_nhi_suspend_noirq()
156 	cmd = wakeup ? ICL_LC_GO2SX : ICL_LC_GO2SX_NO_WAKE;  in icl_nhi_suspend_noirq()
157 	icl_nhi_lc_mailbox_cmd(nhi, cmd);  in icl_nhi_suspend_noirq()