1 /*
2  * Copyright (C) 2019-2022 Intel Corporation.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #include <asm/vm_config.h>
8 #include <pci.h>
9 #include <asm/pci_dev.h>
10 #include <vpci.h>
11 
12 /*
13  * @pre pdev != NULL;
14  */
allocate_to_prelaunched_vm(struct pci_pdev * pdev)15 static bool allocate_to_prelaunched_vm(struct pci_pdev *pdev)
16 {
17 	bool found = false;
18 	uint16_t vmid;
19 	uint16_t pci_idx;
20 	struct acrn_vm_config *vm_config;
21 	struct acrn_vm_pci_dev_config *dev_config;
22 
23 	for (vmid = 0U; (vmid < CONFIG_MAX_VM_NUM) && !found; vmid++) {
24 		vm_config = get_vm_config(vmid);
25 		if (vm_config->load_order == PRE_LAUNCHED_VM) {
26 			for (pci_idx = 0U; pci_idx < vm_config->pci_dev_num; pci_idx++) {
27 				dev_config = &vm_config->pci_devs[pci_idx];
28 				if ((dev_config->emu_type == PCI_DEV_TYPE_PTDEV) &&
29 						bdf_is_equal(dev_config->pbdf, pdev->bdf)) {
30 					dev_config->pdev = pdev;
31 					found = true;
32 					break;
33 				}
34 			}
35 		}
36 	}
37 
38 	return found;
39 }
40 
41 
42 /*
43  * @brief Initialize a acrn_vm_pci_dev_config structure
44  *
45  * Initialize a acrn_vm_pci_dev_config structure with a specified the pdev structure.
46  * A acrn_vm_pci_dev_config is used to store a PCI device configuration for a VM. The
47  * caller of the function init_one_dev_config should guarantee execution atomically.
48  *
49  * @pre pdev != NULL
50  *
51  * @return If there's a successfully initialized acrn_vm_pci_dev_config return it, otherwise return NULL;
52  */
init_one_dev_config(struct pci_pdev * pdev)53 struct acrn_vm_pci_dev_config *init_one_dev_config(struct pci_pdev *pdev)
54 {
55 	struct acrn_vm_pci_dev_config *dev_config = NULL;
56 	bool is_allocated_to_prelaunched_vm = allocate_to_prelaunched_vm(pdev);
57 	bool is_allocated_to_hv = is_hv_owned_pdev(pdev->bdf);
58 
59 	if (service_vm_config != NULL) {
60 		dev_config = &service_vm_config->pci_devs[service_vm_config->pci_dev_num];
61 
62 		if (is_allocated_to_hv) {
63 			/* Service VM need to emulate the type1 pdevs owned by HV */
64 			dev_config->emu_type = PCI_DEV_TYPE_SERVICE_VM_EMUL;
65 			if (is_bridge(pdev)) {
66 				dev_config->vdev_ops = &vpci_bridge_ops;
67 			} else if (is_host_bridge(pdev)) {
68 				dev_config->vdev_ops = &vhostbridge_ops;
69 			} else {
70 				/* May have type0 device, E.g. debug pci uart */
71 				dev_config = NULL;
72 			}
73 		} else if (is_allocated_to_prelaunched_vm) {
74 			dev_config = NULL;
75 		} else {
76 			dev_config->emu_type = PCI_DEV_TYPE_PTDEV;
77 		}
78 
79 		if ((is_allocated_to_hv || is_allocated_to_prelaunched_vm)
80 				&& (dev_config == NULL)
81 				&& is_pci_cfg_multifunction(pdev->hdr_type)
82 				&& (pdev->bdf.bits.f == 0U))
83 		{
84 			dev_config = &service_vm_config->pci_devs[service_vm_config->pci_dev_num];
85 			dev_config->emu_type = PCI_DEV_TYPE_DUMMY_MF_EMUL;
86 			dev_config->vdev_ops = &vpci_mf_dev_ops;
87 		}
88 	}
89 
90 	if (dev_config != NULL) {
91 		dev_config->vbdf.value = pdev->bdf.value;
92 		dev_config->pbdf.value = pdev->bdf.value;
93 		dev_config->pdev = pdev;
94 		service_vm_config->pci_dev_num++;
95 	}
96 	return dev_config;
97 }
98