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Commit | Line | Data |
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c759b24f MT |
1 | #include "hw/pci/slotid_cap.h" |
2 | #include "hw/pci/pci.h" | |
b4a42f81 | 3 | #include "qemu/error-report.h" |
762833b3 MT |
4 | |
5 | #define SLOTID_CAP_LENGTH 4 | |
6 | #define SLOTID_NSLOTS_SHIFT (ffs(PCI_SID_ESR_NSLOTS) - 1) | |
7 | ||
8 | int slotid_cap_init(PCIDevice *d, int nslots, | |
9 | uint8_t chassis, | |
10 | unsigned offset) | |
11 | { | |
12 | int cap; | |
13 | if (!chassis) { | |
14 | error_report("Bridge chassis not specified. Each bridge is required " | |
15 | "to be assigned a unique chassis id > 0."); | |
16 | return -EINVAL; | |
17 | } | |
18 | if (nslots < 0 || nslots > (PCI_SID_ESR_NSLOTS >> SLOTID_NSLOTS_SHIFT)) { | |
19 | /* TODO: error report? */ | |
20 | return -EINVAL; | |
21 | } | |
22 | ||
23 | cap = pci_add_capability(d, PCI_CAP_ID_SLOTID, offset, SLOTID_CAP_LENGTH); | |
24 | if (cap < 0) { | |
25 | return cap; | |
26 | } | |
27 | /* We make each chassis unique, this way each bridge is First in Chassis */ | |
28 | d->config[cap + PCI_SID_ESR] = PCI_SID_ESR_FIC | | |
29 | (nslots << SLOTID_NSLOTS_SHIFT); | |
30 | d->cmask[cap + PCI_SID_ESR] = 0xff; | |
31 | d->config[cap + PCI_SID_CHASSIS_NR] = chassis; | |
32 | /* Note: Chassis number register is non-volatile, | |
33 | so we don't reset it. */ | |
34 | /* TODO: store in eeprom? */ | |
35 | d->wmask[cap + PCI_SID_CHASSIS_NR] = 0xff; | |
36 | ||
37 | d->cap_present |= QEMU_PCI_CAP_SLOTID; | |
38 | return 0; | |
39 | } | |
40 | ||
41 | void slotid_cap_cleanup(PCIDevice *d) | |
42 | { | |
43 | /* TODO: cleanup config space? */ | |
44 | d->cap_present &= ~QEMU_PCI_CAP_SLOTID; | |
45 | } |