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Annotation of qemu/hw/slotid_cap.c, revision 1.1.1.1

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

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