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s390x/pci: refactor list_pci 

Because of the refactor of s390_pci_find_dev_by_idx(), list_pci()
should be updated. We introduce a new function to get the next
available zpci device. It simplifies the code of looking up zpci
devices.

Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Acked-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Yi Min Zhao 2016-06-03 15:16:01 +08:00 committed by Cornelia Huck
parent ab9746570a
commit 4e3bfc167d
3 changed files with 44 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
hw/s390x/s390-pci-bus.c
View File

@ -91,6 +91,26 @@ int chsc_sei_nt2_have_event(void)
return !QTAILQ_EMPTY(&s->pending_sei);
}
S390PCIBusDevice *s390_pci_find_next_avail_dev(S390PCIBusDevice *pbdev)
{
int idx = 0;
S390PCIBusDevice *dev = NULL;
S390pciState *s = s390_get_phb();
if (pbdev) {
idx = (pbdev->fh & FH_MASK_INDEX) + 1;
}
for (; idx < PCI_SLOT_MAX; idx++) {
dev = s->pbdev[idx];
if (dev && dev->state != ZPCI_FS_RESERVED) {
return dev;
}
}
return NULL;
}
S390PCIBusDevice *s390_pci_find_dev_by_fid(uint32_t fid)
{
S390PCIBusDevice *pbdev;

1
hw/s390x/s390-pci-bus.h
View File

@ -310,5 +310,6 @@ void s390_pci_generate_error_event(uint16_t pec, uint32_t fh, uint32_t fid,
S390PCIBusDevice *s390_pci_find_dev_by_idx(uint32_t idx);
S390PCIBusDevice *s390_pci_find_dev_by_fh(uint32_t fh);
S390PCIBusDevice *s390_pci_find_dev_by_fid(uint32_t fid);
S390PCIBusDevice *s390_pci_find_next_avail_dev(S390PCIBusDevice *pbdev);
#endif

48
hw/s390x/s390-pci-inst.c
View File

@ -37,9 +37,9 @@ static void s390_set_status_code(CPUS390XState *env,
static int list_pci(ClpReqRspListPci *rrb, uint8_t *cc)
{
S390PCIBusDevice *pbdev;
uint32_t res_code, initial_l2, g_l2, finish;
int rc, idx;
S390PCIBusDevice *pbdev = NULL;
uint32_t res_code, initial_l2, g_l2;
int rc, i;
uint64_t resume_token;
rc = 0;
@ -71,6 +71,8 @@ static int list_pci(ClpReqRspListPci *rrb, uint8_t *cc)
rc = -EINVAL;
goto out;
}
} else {
pbdev = s390_pci_find_next_avail_dev(NULL);
}
if (lduw_p(&rrb->response.hdr.len) < 48) {
@ -94,40 +96,36 @@ static int list_pci(ClpReqRspListPci *rrb, uint8_t *cc)
stw_p(&rrb->response.max_fn, PCI_MAX_FUNCTIONS);
rrb->response.flags = UID_CHECKING_ENABLED;
rrb->response.entry_size = sizeof(ClpFhListEntry);
finish = 0;
idx = resume_token;
i = 0;
g_l2 = LIST_PCI_HDR_LEN;
do {
pbdev = s390_pci_find_dev_by_idx(idx);
if (!pbdev) {
finish = 1;
break;
}
stw_p(&rrb->response.fh_list[idx - resume_token].device_id,
while (g_l2 < initial_l2 && pbdev) {
stw_p(&rrb->response.fh_list[i].device_id,
pci_get_word(pbdev->pdev->config + PCI_DEVICE_ID));
stw_p(&rrb->response.fh_list[idx - resume_token].vendor_id,
stw_p(&rrb->response.fh_list[i].vendor_id,
pci_get_word(pbdev->pdev->config + PCI_VENDOR_ID));
/* Ignore RESERVED devices. */
stl_p(&rrb->response.fh_list[idx - resume_token].config,
stl_p(&rrb->response.fh_list[i].config,
pbdev->state == ZPCI_FS_STANDBY ? 0 : 1 << 31);
stl_p(&rrb->response.fh_list[idx - resume_token].fid, pbdev->fid);
stl_p(&rrb->response.fh_list[idx - resume_token].fh, pbdev->fh);
stl_p(&rrb->response.fh_list[i].fid, pbdev->fid);
stl_p(&rrb->response.fh_list[i].fh, pbdev->fh);
g_l2 += sizeof(ClpFhListEntry);
/* Add endian check for DPRINTF? */
DPRINTF("g_l2 %d vendor id 0x%x device id 0x%x fid 0x%x fh 0x%x\n",
g_l2,
lduw_p(&rrb->response.fh_list[idx - resume_token].vendor_id),
lduw_p(&rrb->response.fh_list[idx - resume_token].device_id),
ldl_p(&rrb->response.fh_list[idx - resume_token].fid),
ldl_p(&rrb->response.fh_list[idx - resume_token].fh));
idx++;
} while (g_l2 < initial_l2);
g_l2,
lduw_p(&rrb->response.fh_list[i].vendor_id),
lduw_p(&rrb->response.fh_list[i].device_id),
ldl_p(&rrb->response.fh_list[i].fid),
ldl_p(&rrb->response.fh_list[i].fh));
pbdev = s390_pci_find_next_avail_dev(pbdev);
i++;
}
if (finish == 1) {
if (!pbdev) {
resume_token = 0;
} else {
resume_token = idx;
resume_token = pbdev->fh & FH_MASK_INDEX;
}
stq_p(&rrb->response.resume_token, resume_token);
stw_p(&rrb->response.hdr.len, g_l2);