s390/kvm/pci.c

159 static int kvm_zpci_set_airq(struct zpci_dev *zdev)
161 	u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_REG_INT);
165 	fib.fmt0.isc = zdev->kzdev->fib.fmt0.isc;
167 	fib.fmt0.noi = airq_iv_end(zdev->aibv);
168 	fib.fmt0.aibv = virt_to_phys(zdev->aibv->vector);
170 	fib.fmt0.aisb = virt_to_phys(aift->sbv->vector + (zdev->aisb / 64) * 8);
171 	fib.fmt0.aisbo = zdev->aisb & 63;
172 	fib.gd = zdev->gisa;
178 static int kvm_zpci_clear_airq(struct zpci_dev *zdev)
180 	u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_DEREG_INT);
184 	fib.gd = zdev->gisa;
224 static int kvm_s390_pci_aif_enable(struct zpci_dev *zdev, struct zpci_fib *fib,
239 	if (zdev->gisa == 0)
242 	kvm = zdev->kzdev->kvm;
243 	msi_vecs = min_t(unsigned int, fib->fmt0.noi, zdev->max_msi);
288 	zdev->aisb = bit; /* store the summary bit number */
289 	zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA |
295 	gaite = (struct zpci_gaite *)aift->gait + (zdev->aisb *
309 	aift->kzdev[zdev->aisb] = zdev->kzdev;
313 	fib->fmt0.aisbo = zdev->aisb & 63;
314 	fib->fmt0.aisb = virt_to_phys(aift->sbv->vector + (zdev->aisb / 64) * 8);
318 	zdev->kzdev->fib.fmt0.isc = fib->fmt0.isc;
319 	zdev->kzdev->fib.fmt0.aibv = fib->fmt0.aibv;
323 	rc = kvm_zpci_set_airq(zdev);
337 static int kvm_s390_pci_aif_disable(struct zpci_dev *zdev, bool force)
339 	struct kvm_zdev *kzdev = zdev->kzdev;
345 	if (zdev->gisa == 0)
355 	rc = kvm_zpci_clear_airq(zdev);
359 	if (zdev->kzdev->fib.fmt0.aibv == 0)
362 	gaite = (struct zpci_gaite *)aift->gait + (zdev->aisb *
376 		aift->kzdev[zdev->aisb] = NULL;
377 		/* Clear zdev info */
378 		airq_iv_free_bit(aift->sbv, zdev->aisb);
379 		airq_iv_release(zdev->aibv);
380 		zdev->aisb = 0;
381 		zdev->aibv = NULL;
404 static int kvm_s390_pci_dev_open(struct zpci_dev *zdev)
412 	kzdev->zdev = zdev;
413 	zdev->kzdev = kzdev;
418 static void kvm_s390_pci_dev_release(struct zpci_dev *zdev)
422 	kzdev = zdev->kzdev;
423 	WARN_ON(kzdev->zdev != zdev);
424 	zdev->kzdev = NULL;
436 	struct zpci_dev *zdev = opaque;
440 	if (!zdev)
443 	mutex_lock(&zdev->kzdev_lock);
445 	if (zdev->kzdev || zdev->gisa != 0 || !kvm) {
446 		mutex_unlock(&zdev->kzdev_lock);
454 	rc = kvm_s390_pci_dev_open(zdev);
472 	if (zdev_enabled(zdev)) {
473 		rc = zpci_disable_device(zdev);
482 	zdev->gisa = (u32)virt_to_phys(&kvm->arch.sie_page2->gisa);
484 	rc = zpci_enable_device(zdev);
489 	rc = zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma,
490 				virt_to_phys(zdev->dma_table), &status);
495 	zdev->kzdev->kvm = kvm;
498 	list_add_tail(&zdev->kzdev->entry, &kvm->arch.kzdev_list);
502 	mutex_unlock(&zdev->kzdev_lock);
506 	zdev->gisa = 0;
508 	if (zdev->kzdev)
509 		kvm_s390_pci_dev_release(zdev);
511 	mutex_unlock(&zdev->kzdev_lock);
518 	struct zpci_dev *zdev = opaque;
522 	if (!zdev)
525 	mutex_lock(&zdev->kzdev_lock);
527 	if (WARN_ON(!zdev->kzdev)) {
528 		mutex_unlock(&zdev->kzdev_lock);
532 	kvm = zdev->kzdev->kvm;
539 	if (zdev->gisa == 0)
543 	if (zdev->kzdev->fib.fmt0.aibv != 0)
544 		kvm_s390_pci_aif_disable(zdev, true);
547 	zdev->gisa = 0;
549 	if (zdev_enabled(zdev)) {
550 		if (zpci_disable_device(zdev))
554 	if (zpci_enable_device(zdev))
558 	zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma,
559 			   virt_to_phys(zdev->dma_table), &status);
563 	list_del(&zdev->kzdev->entry);
565 	kvm_s390_pci_dev_release(zdev);
568 	mutex_unlock(&zdev->kzdev_lock);
592 	struct zpci_dev *zdev = NULL;
597 		if (kzdev->zdev->fh == fh) {
598 			zdev = kzdev->zdev;
604 	return zdev;
607 static int kvm_s390_pci_zpci_reg_aen(struct zpci_dev *zdev,
627 	return kvm_s390_pci_aif_enable(zdev, &fib, hostflag);
633 	struct zpci_dev *zdev;
636 	zdev = get_zdev_from_kvm_by_fh(kvm, args->fh);
637 	if (!zdev)
640 	mutex_lock(&zdev->kzdev_lock);
643 	kzdev = zdev->kzdev;
660 		r = kvm_s390_pci_zpci_reg_aen(zdev, args);
663 		r = kvm_s390_pci_aif_disable(zdev, false);
671 	mutex_unlock(&zdev->kzdev_lock);