forked from ~ljy/RK356X_SDK_RELEASE
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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d 
 kernel/drivers/xen/xen-pciback/pci_stub.c
....@@ -6,6 +6,7 @@
66  */
77 
88 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
+#define dev_fmt pr_fmt
910 
1011 #include <linux/module.h>
1112 #include <linux/init.h>
....@@ -303,6 +304,8 @@
303304 	/* And cleanup up our emulated fields. */
304305 	xen_pcibk_config_reset_dev(dev);
305306 	xen_pcibk_config_free_dyn_fields(dev);
307
+
308
+	dev_data->allow_interrupt_control = 0;
306309 
307310 	xen_unregister_device_domain_owner(dev);
308311 
....@@ -624,11 +627,11 @@
624627 		if (found_psdev->pdev) {
625628 			int domid = xen_find_device_domain_owner(dev);
626629 
627
-			pr_warn("****** removing device %s while still in-use by domain %d! ******\n",
630
+			dev_warn(&dev->dev, "****** removing device %s while still in-use by domain %d! ******\n",
628631 			       pci_name(found_psdev->dev), domid);
629
-			pr_warn("****** driver domain may still access this device's i/o resources!\n");
630
-			pr_warn("****** shutdown driver domain before binding device\n");
631
-			pr_warn("****** to other drivers or domains\n");
632
+			dev_warn(&dev->dev, "****** driver domain may still access this device's i/o resources!\n");
633
+			dev_warn(&dev->dev, "****** shutdown driver domain before binding device\n");
634
+			dev_warn(&dev->dev, "****** to other drivers or domains\n");
632635 
633636 			/* N.B. This ends up calling pcistub_put_pci_dev which ends up
634637 			 * doing the FLR. */
....@@ -709,14 +712,12 @@
709712 	ret = xen_pcibk_get_pcifront_dev(psdev->dev, psdev->pdev,
710713 		&aer_op->domain, &aer_op->bus, &aer_op->devfn);
711714 	if (!ret) {
712
-		dev_err(&psdev->dev->dev,
713
-			DRV_NAME ": failed to get pcifront device\n");
715
+		dev_err(&psdev->dev->dev, "failed to get pcifront device\n");
714716 		return PCI_ERS_RESULT_NONE;
715717 	}
716718 	wmb();
717719 
718
-	dev_dbg(&psdev->dev->dev,
719
-			DRV_NAME ": aer_op %x dom %x bus %x devfn %x\n",
720
+	dev_dbg(&psdev->dev->dev, "aer_op %x dom %x bus %x devfn %x\n",
720721 			aer_cmd, aer_op->domain, aer_op->bus, aer_op->devfn);
721722 	/*local flag to mark there's aer request, xen_pcibk callback will use
722723 	* this flag to judge whether we need to check pci-front give aer
....@@ -784,13 +785,12 @@
784785 				PCI_FUNC(dev->devfn));
785786 
786787 	if (!psdev || !psdev->pdev) {
787
-		dev_err(&dev->dev,
788
-			DRV_NAME " device is not found/assigned\n");
788
+		dev_err(&dev->dev, "device is not found/assigned\n");
789789 		goto end;
790790 	}
791791 
792792 	if (!psdev->pdev->sh_info) {
793
-		dev_err(&dev->dev, DRV_NAME " device is not connected or owned"
793
+		dev_err(&dev->dev, "device is not connected or owned"
794794 			" by HVM, kill it\n");
795795 		kill_domain_by_device(psdev);
796796 		goto end;
....@@ -842,13 +842,12 @@
842842 				PCI_FUNC(dev->devfn));
843843 
844844 	if (!psdev || !psdev->pdev) {
845
-		dev_err(&dev->dev,
846
-			DRV_NAME " device is not found/assigned\n");
845
+		dev_err(&dev->dev, "device is not found/assigned\n");
847846 		goto end;
848847 	}
849848 
850849 	if (!psdev->pdev->sh_info) {
851
-		dev_err(&dev->dev, DRV_NAME " device is not connected or owned"
850
+		dev_err(&dev->dev, "device is not connected or owned"
852851 			" by HVM, kill it\n");
853852 		kill_domain_by_device(psdev);
854853 		goto end;
....@@ -900,13 +899,12 @@
900899 				PCI_FUNC(dev->devfn));
901900 
902901 	if (!psdev || !psdev->pdev) {
903
-		dev_err(&dev->dev,
904
-			DRV_NAME " device is not found/assigned\n");
902
+		dev_err(&dev->dev, "device is not found/assigned\n");
905903 		goto end;
906904 	}
907905 
908906 	if (!psdev->pdev->sh_info) {
909
-		dev_err(&dev->dev, DRV_NAME " device is not connected or owned"
907
+		dev_err(&dev->dev, "device is not connected or owned"
910908 			" by HVM, kill it\n");
911909 		kill_domain_by_device(psdev);
912910 		goto end;
....@@ -954,13 +952,12 @@
954952 				PCI_FUNC(dev->devfn));
955953 
956954 	if (!psdev || !psdev->pdev) {
957
-		dev_err(&dev->dev,
958
-			DRV_NAME " device is not found/assigned\n");
955
+		dev_err(&dev->dev, "device is not found/assigned\n");
959956 		goto end;
960957 	}
961958 
962959 	if (!psdev->pdev->sh_info) {
963
-		dev_err(&dev->dev, DRV_NAME " device is not connected or owned"
960
+		dev_err(&dev->dev, "device is not connected or owned"
964961 			" by HVM, kill it\n");
965962 		kill_domain_by_device(psdev);
966963 		goto end;
....@@ -1431,6 +1428,65 @@
14311428 }
14321429 static DRIVER_ATTR_RW(permissive);
14331430 
1431
+static ssize_t allow_interrupt_control_store(struct device_driver *drv,
1432
+					     const char *buf, size_t count)
1433
+{
1434
+	int domain, bus, slot, func;
1435
+	int err;
1436
+	struct pcistub_device *psdev;
1437
+	struct xen_pcibk_dev_data *dev_data;
1438
+
1439
+	err = str_to_slot(buf, &domain, &bus, &slot, &func);
1440
+	if (err)
1441
+		goto out;
1442
+
1443
+	psdev = pcistub_device_find(domain, bus, slot, func);
1444
+	if (!psdev) {
1445
+		err = -ENODEV;
1446
+		goto out;
1447
+	}
1448
+
1449
+	dev_data = pci_get_drvdata(psdev->dev);
1450
+	/* the driver data for a device should never be null at this point */
1451
+	if (!dev_data) {
1452
+		err = -ENXIO;
1453
+		goto release;
1454
+	}
1455
+	dev_data->allow_interrupt_control = 1;
1456
+release:
1457
+	pcistub_device_put(psdev);
1458
+out:
1459
+	if (!err)
1460
+		err = count;
1461
+	return err;
1462
+}
1463
+
1464
+static ssize_t allow_interrupt_control_show(struct device_driver *drv,
1465
+					    char *buf)
1466
+{
1467
+	struct pcistub_device *psdev;
1468
+	struct xen_pcibk_dev_data *dev_data;
1469
+	size_t count = 0;
1470
+	unsigned long flags;
1471
+
1472
+	spin_lock_irqsave(&pcistub_devices_lock, flags);
1473
+	list_for_each_entry(psdev, &pcistub_devices, dev_list) {
1474
+		if (count >= PAGE_SIZE)
1475
+			break;
1476
+		if (!psdev->dev)
1477
+			continue;
1478
+		dev_data = pci_get_drvdata(psdev->dev);
1479
+		if (!dev_data || !dev_data->allow_interrupt_control)
1480
+			continue;
1481
+		count +=
1482
+		    scnprintf(buf + count, PAGE_SIZE - count, "%s\n",
1483
+			      pci_name(psdev->dev));
1484
+	}
1485
+	spin_unlock_irqrestore(&pcistub_devices_lock, flags);
1486
+	return count;
1487
+}
1488
+static DRIVER_ATTR_RW(allow_interrupt_control);
1489
+
14341490 static void pcistub_exit(void)
14351491 {
14361492 	driver_remove_file(&xen_pcibk_pci_driver.driver, &driver_attr_new_slot);
....@@ -1440,6 +1496,8 @@
14401496 	driver_remove_file(&xen_pcibk_pci_driver.driver, &driver_attr_quirks);
14411497 	driver_remove_file(&xen_pcibk_pci_driver.driver,
14421498 			   &driver_attr_permissive);
1499
+	driver_remove_file(&xen_pcibk_pci_driver.driver,
1500
+			   &driver_attr_allow_interrupt_control);
14431501 	driver_remove_file(&xen_pcibk_pci_driver.driver,
14441502 			   &driver_attr_irq_handlers);
14451503 	driver_remove_file(&xen_pcibk_pci_driver.driver,
....@@ -1530,6 +1588,9 @@
15301588 	if (!err)
15311589 		err = driver_create_file(&xen_pcibk_pci_driver.driver,
15321590 					 &driver_attr_permissive);
1591
+	if (!err)
1592
+		err = driver_create_file(&xen_pcibk_pci_driver.driver,
1593
+					 &driver_attr_allow_interrupt_control);
15331594 
15341595 	if (!err)
15351596 		err = driver_create_file(&xen_pcibk_pci_driver.driver,