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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
4 * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
5 *
6 * All rights reserved.
7 *
8 * Send feedback to <lxie@us.ibm.com>
9 *
10 */
11#include <linux/pci.h>
12#include <linux/string.h>
13
14#include <asm/pci-bridge.h>
15#include <asm/rtas.h>
16#include <asm/machdep.h>
17
18#include "../pci.h" /* for pci_add_new_bus */
19#include "rpaphp.h"
20
21int rpaphp_get_sensor_state(struct slot *slot, int *state)
22{
23 int rc;
24 int setlevel;
25
26 rc = rtas_get_sensor(DR_ENTITY_SENSE, slot->index, state);
27
28 if (rc < 0) {
29 if (rc == -EFAULT || rc == -EEXIST) {
30 dbg("%s: slot must be power up to get sensor-state\n",
31 __func__);
32
33 /* some slots have to be powered up
34 * before get-sensor will succeed.
35 */
36 rc = rtas_set_power_level(slot->power_domain, POWER_ON,
37 &setlevel);
38 if (rc < 0) {
39 dbg("%s: power on slot[%s] failed rc=%d.\n",
40 __func__, slot->name, rc);
41 } else {
42 rc = rtas_get_sensor(DR_ENTITY_SENSE,
43 slot->index, state);
44 }
45 } else if (rc == -ENODEV)
46 info("%s: slot is unusable\n", __func__);
47 else
48 err("%s failed to get sensor state\n", __func__);
49 }
50 return rc;
51}
52
53/**
54 * rpaphp_enable_slot - record slot state, config pci device
55 * @slot: target &slot
56 *
57 * Initialize values in the slot structure to indicate if there is a pci card
58 * plugged into the slot. If the slot is not empty, run the pcibios routine
59 * to get pcibios stuff correctly set up.
60 */
61int rpaphp_enable_slot(struct slot *slot)
62{
63 int rc, level, state;
64 struct pci_bus *bus;
65
66 slot->state = EMPTY;
67
68 /* Find out if the power is turned on for the slot */
69 rc = rtas_get_power_level(slot->power_domain, &level);
70 if (rc)
71 return rc;
72
73 /* Figure out if there is an adapter in the slot */
74 rc = rpaphp_get_sensor_state(slot, &state);
75 if (rc)
76 return rc;
77
78 bus = pci_find_bus_by_node(slot->dn);
79 if (!bus) {
80 err("%s: no pci_bus for dn %pOF\n", __func__, slot->dn);
81 return -EINVAL;
82 }
83
84 slot->bus = bus;
85 slot->pci_devs = &bus->devices;
86
87 /* if there's an adapter in the slot, go add the pci devices */
88 if (state == PRESENT) {
89 slot->state = NOT_CONFIGURED;
90
91 /* non-empty slot has to have child */
92 if (!slot->dn->child) {
93 err("%s: slot[%s]'s device_node doesn't have child for adapter\n",
94 __func__, slot->name);
95 return -EINVAL;
96 }
97
98 if (list_empty(&bus->devices))
99 pci_hp_add_devices(bus);
100
101 if (!list_empty(&bus->devices)) {
102 slot->state = CONFIGURED;
103 }
104
105 if (rpaphp_debug) {
106 struct pci_dev *dev;
107 dbg("%s: pci_devs of slot[%pOF]\n", __func__, slot->dn);
108 list_for_each_entry(dev, &bus->devices, bus_list)
109 dbg("\t%s\n", pci_name(dev));
110 }
111 }
112
113 return 0;
114}
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
4 * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
5 *
6 * All rights reserved.
7 *
8 * Send feedback to <lxie@us.ibm.com>
9 *
10 */
11#include <linux/pci.h>
12#include <linux/string.h>
13
14#include <asm/pci-bridge.h>
15#include <asm/rtas.h>
16#include <asm/machdep.h>
17
18#include "../pci.h" /* for pci_add_new_bus */
19#include "rpaphp.h"
20
21int rpaphp_get_sensor_state(struct slot *slot, int *state)
22{
23 int rc;
24 int setlevel;
25
26 rc = rtas_get_sensor(DR_ENTITY_SENSE, slot->index, state);
27
28 if (rc < 0) {
29 if (rc == -EFAULT || rc == -EEXIST) {
30 dbg("%s: slot must be power up to get sensor-state\n",
31 __func__);
32
33 /* some slots have to be powered up
34 * before get-sensor will succeed.
35 */
36 rc = rtas_set_power_level(slot->power_domain, POWER_ON,
37 &setlevel);
38 if (rc < 0) {
39 dbg("%s: power on slot[%s] failed rc=%d.\n",
40 __func__, slot->name, rc);
41 } else {
42 rc = rtas_get_sensor(DR_ENTITY_SENSE,
43 slot->index, state);
44 }
45 } else if (rc == -ENODEV)
46 info("%s: slot is unusable\n", __func__);
47 else
48 err("%s failed to get sensor state\n", __func__);
49 }
50 return rc;
51}
52
53/**
54 * rpaphp_enable_slot - record slot state, config pci device
55 * @slot: target &slot
56 *
57 * Initialize values in the slot structure to indicate if there is a pci card
58 * plugged into the slot. If the slot is not empty, run the pcibios routine
59 * to get pcibios stuff correctly set up.
60 */
61int rpaphp_enable_slot(struct slot *slot)
62{
63 int rc, level, state;
64 struct pci_bus *bus;
65
66 slot->state = EMPTY;
67
68 /* Find out if the power is turned on for the slot */
69 rc = rtas_get_power_level(slot->power_domain, &level);
70 if (rc)
71 return rc;
72
73 /* Figure out if there is an adapter in the slot */
74 rc = rpaphp_get_sensor_state(slot, &state);
75 if (rc)
76 return rc;
77
78 bus = pci_find_bus_by_node(slot->dn);
79 if (!bus) {
80 err("%s: no pci_bus for dn %pOF\n", __func__, slot->dn);
81 return -EINVAL;
82 }
83
84 slot->bus = bus;
85 slot->pci_devs = &bus->devices;
86
87 /* if there's an adapter in the slot, go add the pci devices */
88 if (state == PRESENT) {
89 slot->state = NOT_CONFIGURED;
90
91 /* non-empty slot has to have child */
92 if (!slot->dn->child) {
93 err("%s: slot[%s]'s device_node doesn't have child for adapter\n",
94 __func__, slot->name);
95 return -EINVAL;
96 }
97
98 if (list_empty(&bus->devices)) {
99 pseries_eeh_init_edev_recursive(PCI_DN(slot->dn));
100 pci_hp_add_devices(bus);
101 }
102
103 if (!list_empty(&bus->devices)) {
104 slot->state = CONFIGURED;
105 }
106
107 if (rpaphp_debug) {
108 struct pci_dev *dev;
109 dbg("%s: pci_devs of slot[%pOF]\n", __func__, slot->dn);
110 list_for_each_entry(dev, &bus->devices, bus_list)
111 dbg("\t%s\n", pci_name(dev));
112 }
113 }
114
115 return 0;
116}