LXR qemu/hw/pci/slotid

   1#include "hw/pci/slotid_cap.h"
   2#include "hw/pci/pci.h"
   3
   4#define SLOTID_CAP_LENGTH 4
   5#define SLOTID_NSLOTS_SHIFT (ffs(PCI_SID_ESR_NSLOTS) - 1)
   6
   7int 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
  40void slotid_cap_cleanup(PCIDevice *d)
  41{
  42    /* TODO: cleanup config space? */
  43    d->cap_present &= ~QEMU_PCI_CAP_SLOTID;
  44}
  45