LXR qemu/hw/pci/slotid

   1#include "hw/pci/slotid_cap.h"
   2#include "hw/pci/pci.h"
   3#include "qemu/error-report.h"
   4
   5#define SLOTID_CAP_LENGTH 4
   6#define SLOTID_NSLOTS_SHIFT (ffs(PCI_SID_ESR_NSLOTS) - 1)
   7
   8int 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
  41void slotid_cap_cleanup(PCIDevice *d)
  42{
  43    /* TODO: cleanup config space? */
  44    d->cap_present &= ~QEMU_PCI_CAP_SLOTID;
  45}
  46