root / hw / pcie_port.c @ 721589dd
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1 | bc20ba98 | Isaku Yamahata | /*
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2 | bc20ba98 | Isaku Yamahata | * pcie_port.c
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3 | bc20ba98 | Isaku Yamahata | *
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4 | bc20ba98 | Isaku Yamahata | * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
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5 | bc20ba98 | Isaku Yamahata | * VA Linux Systems Japan K.K.
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6 | bc20ba98 | Isaku Yamahata | *
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7 | bc20ba98 | Isaku Yamahata | * This program is free software; you can redistribute it and/or modify
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8 | bc20ba98 | Isaku Yamahata | * it under the terms of the GNU General Public License as published by
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9 | bc20ba98 | Isaku Yamahata | * the Free Software Foundation; either version 2 of the License, or
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10 | bc20ba98 | Isaku Yamahata | * (at your option) any later version.
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11 | bc20ba98 | Isaku Yamahata | *
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12 | bc20ba98 | Isaku Yamahata | * This program is distributed in the hope that it will be useful,
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13 | bc20ba98 | Isaku Yamahata | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | bc20ba98 | Isaku Yamahata | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | bc20ba98 | Isaku Yamahata | * GNU General Public License for more details.
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16 | bc20ba98 | Isaku Yamahata | *
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17 | bc20ba98 | Isaku Yamahata | * You should have received a copy of the GNU General Public License along
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18 | bc20ba98 | Isaku Yamahata | * with this program; if not, see <http://www.gnu.org/licenses/>.
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19 | bc20ba98 | Isaku Yamahata | */
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20 | bc20ba98 | Isaku Yamahata | |
21 | bc20ba98 | Isaku Yamahata | #include "pcie_port.h" |
22 | bc20ba98 | Isaku Yamahata | |
23 | bc20ba98 | Isaku Yamahata | void pcie_port_init_reg(PCIDevice *d)
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24 | bc20ba98 | Isaku Yamahata | { |
25 | bc20ba98 | Isaku Yamahata | /* Unlike pci bridge,
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26 | bc20ba98 | Isaku Yamahata | 66MHz and fast back to back don't apply to pci express port. */
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27 | bc20ba98 | Isaku Yamahata | pci_set_word(d->config + PCI_STATUS, 0);
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28 | bc20ba98 | Isaku Yamahata | pci_set_word(d->config + PCI_SEC_STATUS, 0);
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29 | bc20ba98 | Isaku Yamahata | |
30 | 633442ff | Michael S. Tsirkin | /* Unlike conventional pci bridge, some bits are hardwired to 0. */
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31 | bba5ed77 | Isaku Yamahata | pci_set_word(d->wmask + PCI_BRIDGE_CONTROL, |
32 | bba5ed77 | Isaku Yamahata | PCI_BRIDGE_CTL_PARITY | |
33 | bba5ed77 | Isaku Yamahata | PCI_BRIDGE_CTL_ISA | |
34 | bba5ed77 | Isaku Yamahata | PCI_BRIDGE_CTL_VGA | |
35 | bba5ed77 | Isaku Yamahata | PCI_BRIDGE_CTL_SERR | |
36 | bba5ed77 | Isaku Yamahata | PCI_BRIDGE_CTL_BUS_RESET); |
37 | bc20ba98 | Isaku Yamahata | } |
38 | bc20ba98 | Isaku Yamahata | |
39 | bc20ba98 | Isaku Yamahata | /**************************************************************************
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40 | bc20ba98 | Isaku Yamahata | * (chassis number, pcie physical slot number) -> pcie slot conversion
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41 | bc20ba98 | Isaku Yamahata | */
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42 | bc20ba98 | Isaku Yamahata | struct PCIEChassis {
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43 | bc20ba98 | Isaku Yamahata | uint8_t number; |
44 | bc20ba98 | Isaku Yamahata | |
45 | bc20ba98 | Isaku Yamahata | QLIST_HEAD(, PCIESlot) slots; |
46 | bc20ba98 | Isaku Yamahata | QLIST_ENTRY(PCIEChassis) next; |
47 | bc20ba98 | Isaku Yamahata | }; |
48 | bc20ba98 | Isaku Yamahata | |
49 | bc20ba98 | Isaku Yamahata | static QLIST_HEAD(, PCIEChassis) chassis = QLIST_HEAD_INITIALIZER(chassis);
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50 | bc20ba98 | Isaku Yamahata | |
51 | bc20ba98 | Isaku Yamahata | static struct PCIEChassis *pcie_chassis_find(uint8_t chassis_number) |
52 | bc20ba98 | Isaku Yamahata | { |
53 | bc20ba98 | Isaku Yamahata | struct PCIEChassis *c;
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54 | bc20ba98 | Isaku Yamahata | QLIST_FOREACH(c, &chassis, next) { |
55 | bc20ba98 | Isaku Yamahata | if (c->number == chassis_number) {
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56 | bc20ba98 | Isaku Yamahata | break;
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57 | bc20ba98 | Isaku Yamahata | } |
58 | bc20ba98 | Isaku Yamahata | } |
59 | bc20ba98 | Isaku Yamahata | return c;
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60 | bc20ba98 | Isaku Yamahata | } |
61 | bc20ba98 | Isaku Yamahata | |
62 | bc20ba98 | Isaku Yamahata | void pcie_chassis_create(uint8_t chassis_number)
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63 | bc20ba98 | Isaku Yamahata | { |
64 | bc20ba98 | Isaku Yamahata | struct PCIEChassis *c;
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65 | bc20ba98 | Isaku Yamahata | c = pcie_chassis_find(chassis_number); |
66 | bc20ba98 | Isaku Yamahata | if (c) {
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67 | bc20ba98 | Isaku Yamahata | return;
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68 | bc20ba98 | Isaku Yamahata | } |
69 | 7267c094 | Anthony Liguori | c = g_malloc0(sizeof(*c));
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70 | bc20ba98 | Isaku Yamahata | c->number = chassis_number; |
71 | bc20ba98 | Isaku Yamahata | QLIST_INIT(&c->slots); |
72 | bc20ba98 | Isaku Yamahata | QLIST_INSERT_HEAD(&chassis, c, next); |
73 | bc20ba98 | Isaku Yamahata | } |
74 | bc20ba98 | Isaku Yamahata | |
75 | bc20ba98 | Isaku Yamahata | static PCIESlot *pcie_chassis_find_slot_with_chassis(struct PCIEChassis *c, |
76 | bc20ba98 | Isaku Yamahata | uint8_t slot) |
77 | bc20ba98 | Isaku Yamahata | { |
78 | bc20ba98 | Isaku Yamahata | PCIESlot *s; |
79 | bc20ba98 | Isaku Yamahata | QLIST_FOREACH(s, &c->slots, next) { |
80 | bc20ba98 | Isaku Yamahata | if (s->slot == slot) {
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81 | bc20ba98 | Isaku Yamahata | break;
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82 | bc20ba98 | Isaku Yamahata | } |
83 | bc20ba98 | Isaku Yamahata | } |
84 | bc20ba98 | Isaku Yamahata | return s;
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85 | bc20ba98 | Isaku Yamahata | } |
86 | bc20ba98 | Isaku Yamahata | |
87 | bc20ba98 | Isaku Yamahata | PCIESlot *pcie_chassis_find_slot(uint8_t chassis_number, uint16_t slot) |
88 | bc20ba98 | Isaku Yamahata | { |
89 | bc20ba98 | Isaku Yamahata | struct PCIEChassis *c;
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90 | bc20ba98 | Isaku Yamahata | c = pcie_chassis_find(chassis_number); |
91 | bc20ba98 | Isaku Yamahata | if (!c) {
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92 | bc20ba98 | Isaku Yamahata | return NULL; |
93 | bc20ba98 | Isaku Yamahata | } |
94 | bc20ba98 | Isaku Yamahata | return pcie_chassis_find_slot_with_chassis(c, slot);
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95 | bc20ba98 | Isaku Yamahata | } |
96 | bc20ba98 | Isaku Yamahata | |
97 | bc20ba98 | Isaku Yamahata | int pcie_chassis_add_slot(struct PCIESlot *slot) |
98 | bc20ba98 | Isaku Yamahata | { |
99 | bc20ba98 | Isaku Yamahata | struct PCIEChassis *c;
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100 | bc20ba98 | Isaku Yamahata | c = pcie_chassis_find(slot->chassis); |
101 | bc20ba98 | Isaku Yamahata | if (!c) {
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102 | bc20ba98 | Isaku Yamahata | return -ENODEV;
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103 | bc20ba98 | Isaku Yamahata | } |
104 | bc20ba98 | Isaku Yamahata | if (pcie_chassis_find_slot_with_chassis(c, slot->slot)) {
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105 | bc20ba98 | Isaku Yamahata | return -EBUSY;
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106 | bc20ba98 | Isaku Yamahata | } |
107 | bc20ba98 | Isaku Yamahata | QLIST_INSERT_HEAD(&c->slots, slot, next); |
108 | bc20ba98 | Isaku Yamahata | return 0; |
109 | bc20ba98 | Isaku Yamahata | } |
110 | bc20ba98 | Isaku Yamahata | |
111 | bc20ba98 | Isaku Yamahata | void pcie_chassis_del_slot(PCIESlot *s)
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112 | bc20ba98 | Isaku Yamahata | { |
113 | bc20ba98 | Isaku Yamahata | QLIST_REMOVE(s, next); |
114 | bc20ba98 | Isaku Yamahata | } |