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9fc34ada AK |
1 | /* |
2 | * QEMU sPAPR PCI host for VFIO | |
3 | * | |
4 | * Copyright (c) 2011-2014 Alexey Kardashevskiy, IBM Corporation. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, | |
9 | * or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
0d75590d | 20 | #include "qemu/osdep.h" |
da34e65c | 21 | #include "qapi/error.h" |
9fc34ada AK |
22 | #include "hw/ppc/spapr.h" |
23 | #include "hw/pci-host/spapr.h" | |
6319b1da | 24 | #include "hw/pci/msix.h" |
9fc34ada | 25 | #include "linux/vfio.h" |
cf7087db | 26 | #include "hw/vfio/vfio.h" |
72700d7e | 27 | #include "qemu/error-report.h" |
9fc34ada | 28 | |
72700d7e | 29 | #define TYPE_SPAPR_PCI_VFIO_HOST_BRIDGE "spapr-pci-vfio-host-bridge" |
9fc34ada | 30 | |
72700d7e DG |
31 | #define SPAPR_PCI_VFIO_HOST_BRIDGE(obj) \ |
32 | OBJECT_CHECK(sPAPRPHBVFIOState, (obj), TYPE_SPAPR_PCI_VFIO_HOST_BRIDGE) | |
9fc34ada | 33 | |
72700d7e | 34 | typedef struct sPAPRPHBVFIOState sPAPRPHBVFIOState; |
9fc34ada | 35 | |
72700d7e DG |
36 | struct sPAPRPHBVFIOState { |
37 | sPAPRPHBState phb; | |
9fc34ada | 38 | |
72700d7e DG |
39 | int32_t iommugroupid; |
40 | }; | |
9fc34ada | 41 | |
72700d7e DG |
42 | static Property spapr_phb_vfio_properties[] = { |
43 | DEFINE_PROP_INT32("iommu", sPAPRPHBVFIOState, iommugroupid, -1), | |
44 | DEFINE_PROP_END_OF_LIST(), | |
45 | }; | |
9fc34ada | 46 | |
72700d7e DG |
47 | static void spapr_phb_vfio_instance_init(Object *obj) |
48 | { | |
49 | error_report("spapr-pci-vfio-host-bridge is deprecated"); | |
9fc34ada AK |
50 | } |
51 | ||
c1fa017c DG |
52 | bool spapr_phb_eeh_available(sPAPRPHBState *sphb) |
53 | { | |
54 | return vfio_eeh_as_ok(&sphb->iommu_as); | |
55 | } | |
56 | ||
76a9e9f6 | 57 | static void spapr_phb_vfio_eeh_reenable(sPAPRPHBState *sphb) |
aef87d1b | 58 | { |
76a9e9f6 | 59 | vfio_eeh_as_op(&sphb->iommu_as, VFIO_EEH_PE_ENABLE); |
aef87d1b GS |
60 | } |
61 | ||
fbb4e983 | 62 | void spapr_phb_vfio_reset(DeviceState *qdev) |
9fc34ada | 63 | { |
aef87d1b GS |
64 | /* |
65 | * The PE might be in frozen state. To reenable the EEH | |
66 | * functionality on it will clean the frozen state, which | |
67 | * ensures that the contained PCI devices will work properly | |
68 | * after reboot. | |
69 | */ | |
76a9e9f6 | 70 | spapr_phb_vfio_eeh_reenable(SPAPR_PCI_HOST_BRIDGE(qdev)); |
9fc34ada AK |
71 | } |
72 | ||
fbb4e983 DG |
73 | int spapr_phb_vfio_eeh_set_option(sPAPRPHBState *sphb, |
74 | unsigned int addr, int option) | |
2aad88f4 | 75 | { |
76a9e9f6 | 76 | uint32_t op; |
2aad88f4 GS |
77 | int ret; |
78 | ||
79 | switch (option) { | |
80 | case RTAS_EEH_DISABLE: | |
76a9e9f6 | 81 | op = VFIO_EEH_PE_DISABLE; |
2aad88f4 GS |
82 | break; |
83 | case RTAS_EEH_ENABLE: { | |
84 | PCIHostState *phb; | |
85 | PCIDevice *pdev; | |
86 | ||
87 | /* | |
88 | * The EEH functionality is enabled on basis of PCI device, | |
89 | * instead of PE. We need check the validity of the PCI | |
90 | * device address. | |
91 | */ | |
92 | phb = PCI_HOST_BRIDGE(sphb); | |
93 | pdev = pci_find_device(phb->bus, | |
94 | (addr >> 16) & 0xFF, (addr >> 8) & 0xFF); | |
d76548a9 | 95 | if (!pdev || !object_dynamic_cast(OBJECT(pdev), "vfio-pci")) { |
2aad88f4 GS |
96 | return RTAS_OUT_PARAM_ERROR; |
97 | } | |
98 | ||
76a9e9f6 | 99 | op = VFIO_EEH_PE_ENABLE; |
2aad88f4 GS |
100 | break; |
101 | } | |
102 | case RTAS_EEH_THAW_IO: | |
76a9e9f6 | 103 | op = VFIO_EEH_PE_UNFREEZE_IO; |
2aad88f4 GS |
104 | break; |
105 | case RTAS_EEH_THAW_DMA: | |
76a9e9f6 | 106 | op = VFIO_EEH_PE_UNFREEZE_DMA; |
2aad88f4 GS |
107 | break; |
108 | default: | |
109 | return RTAS_OUT_PARAM_ERROR; | |
110 | } | |
111 | ||
76a9e9f6 | 112 | ret = vfio_eeh_as_op(&sphb->iommu_as, op); |
2aad88f4 GS |
113 | if (ret < 0) { |
114 | return RTAS_OUT_HW_ERROR; | |
115 | } | |
116 | ||
117 | return RTAS_OUT_SUCCESS; | |
118 | } | |
119 | ||
fbb4e983 | 120 | int spapr_phb_vfio_eeh_get_state(sPAPRPHBState *sphb, int *state) |
2aad88f4 | 121 | { |
2aad88f4 GS |
122 | int ret; |
123 | ||
76a9e9f6 | 124 | ret = vfio_eeh_as_op(&sphb->iommu_as, VFIO_EEH_PE_GET_STATE); |
2aad88f4 GS |
125 | if (ret < 0) { |
126 | return RTAS_OUT_PARAM_ERROR; | |
127 | } | |
128 | ||
129 | *state = ret; | |
130 | return RTAS_OUT_SUCCESS; | |
131 | } | |
132 | ||
6319b1da GS |
133 | static void spapr_phb_vfio_eeh_clear_dev_msix(PCIBus *bus, |
134 | PCIDevice *pdev, | |
135 | void *opaque) | |
136 | { | |
137 | /* Check if the device is VFIO PCI device */ | |
138 | if (!object_dynamic_cast(OBJECT(pdev), "vfio-pci")) { | |
139 | return; | |
140 | } | |
141 | ||
142 | /* | |
143 | * The MSIx table will be cleaned out by reset. We need | |
144 | * disable it so that it can be reenabled properly. Also, | |
145 | * the cached MSIx table should be cleared as it's not | |
146 | * reflecting the contents in hardware. | |
147 | */ | |
148 | if (msix_enabled(pdev)) { | |
149 | uint16_t flags; | |
150 | ||
151 | flags = pci_host_config_read_common(pdev, | |
152 | pdev->msix_cap + PCI_MSIX_FLAGS, | |
153 | pci_config_size(pdev), 2); | |
154 | flags &= ~PCI_MSIX_FLAGS_ENABLE; | |
155 | pci_host_config_write_common(pdev, | |
156 | pdev->msix_cap + PCI_MSIX_FLAGS, | |
157 | pci_config_size(pdev), flags, 2); | |
158 | } | |
159 | ||
160 | msix_reset(pdev); | |
161 | } | |
162 | ||
163 | static void spapr_phb_vfio_eeh_clear_bus_msix(PCIBus *bus, void *opaque) | |
164 | { | |
165 | pci_for_each_device(bus, pci_bus_num(bus), | |
166 | spapr_phb_vfio_eeh_clear_dev_msix, NULL); | |
167 | } | |
168 | ||
169 | static void spapr_phb_vfio_eeh_pre_reset(sPAPRPHBState *sphb) | |
170 | { | |
171 | PCIHostState *phb = PCI_HOST_BRIDGE(sphb); | |
172 | ||
173 | pci_for_each_bus(phb->bus, spapr_phb_vfio_eeh_clear_bus_msix, NULL); | |
174 | } | |
175 | ||
fbb4e983 | 176 | int spapr_phb_vfio_eeh_reset(sPAPRPHBState *sphb, int option) |
2aad88f4 | 177 | { |
76a9e9f6 | 178 | uint32_t op; |
2aad88f4 GS |
179 | int ret; |
180 | ||
181 | switch (option) { | |
182 | case RTAS_SLOT_RESET_DEACTIVATE: | |
76a9e9f6 | 183 | op = VFIO_EEH_PE_RESET_DEACTIVATE; |
2aad88f4 GS |
184 | break; |
185 | case RTAS_SLOT_RESET_HOT: | |
6319b1da | 186 | spapr_phb_vfio_eeh_pre_reset(sphb); |
76a9e9f6 | 187 | op = VFIO_EEH_PE_RESET_HOT; |
2aad88f4 GS |
188 | break; |
189 | case RTAS_SLOT_RESET_FUNDAMENTAL: | |
6319b1da | 190 | spapr_phb_vfio_eeh_pre_reset(sphb); |
76a9e9f6 | 191 | op = VFIO_EEH_PE_RESET_FUNDAMENTAL; |
2aad88f4 GS |
192 | break; |
193 | default: | |
194 | return RTAS_OUT_PARAM_ERROR; | |
195 | } | |
196 | ||
76a9e9f6 | 197 | ret = vfio_eeh_as_op(&sphb->iommu_as, op); |
2aad88f4 GS |
198 | if (ret < 0) { |
199 | return RTAS_OUT_HW_ERROR; | |
200 | } | |
201 | ||
202 | return RTAS_OUT_SUCCESS; | |
203 | } | |
204 | ||
fbb4e983 | 205 | int spapr_phb_vfio_eeh_configure(sPAPRPHBState *sphb) |
2aad88f4 | 206 | { |
2aad88f4 GS |
207 | int ret; |
208 | ||
76a9e9f6 | 209 | ret = vfio_eeh_as_op(&sphb->iommu_as, VFIO_EEH_PE_CONFIGURE); |
2aad88f4 GS |
210 | if (ret < 0) { |
211 | return RTAS_OUT_PARAM_ERROR; | |
212 | } | |
213 | ||
214 | return RTAS_OUT_SUCCESS; | |
215 | } | |
216 | ||
9fc34ada AK |
217 | static void spapr_phb_vfio_class_init(ObjectClass *klass, void *data) |
218 | { | |
219 | DeviceClass *dc = DEVICE_CLASS(klass); | |
9fc34ada AK |
220 | |
221 | dc->props = spapr_phb_vfio_properties; | |
9fc34ada AK |
222 | } |
223 | ||
224 | static const TypeInfo spapr_phb_vfio_info = { | |
225 | .name = TYPE_SPAPR_PCI_VFIO_HOST_BRIDGE, | |
226 | .parent = TYPE_SPAPR_PCI_HOST_BRIDGE, | |
227 | .instance_size = sizeof(sPAPRPHBVFIOState), | |
72700d7e | 228 | .instance_init = spapr_phb_vfio_instance_init, |
9fc34ada | 229 | .class_init = spapr_phb_vfio_class_init, |
9fc34ada AK |
230 | }; |
231 | ||
232 | static void spapr_pci_vfio_register_types(void) | |
233 | { | |
234 | type_register_static(&spapr_phb_vfio_info); | |
235 | } | |
236 | ||
237 | type_init(spapr_pci_vfio_register_types) |