*/
union win_slot_encoding {
struct {
- u32 func:8;
+ u32 dev:5;
+ u32 func:3;
u32 reserved:24;
} bits;
u32 slot;
*/
struct pci_message {
- u32 message_type;
+ u32 type;
} __packed;
struct pci_child_message {
- u32 message_type;
+ struct pci_message message_type;
union win_slot_encoding wslot;
} __packed;
void (*completion_func)(void *context, struct pci_response *resp,
int resp_packet_size);
void *compl_ctxt;
- struct pci_message message;
+
+ struct pci_message message[0];
};
/*
struct pci_bus_relations {
struct pci_incoming_message incoming;
u32 device_count;
- struct pci_function_description func[1];
+ struct pci_function_description func[0];
} __packed;
struct pci_q_res_req_response {
} __packed;
struct pci_eject_response {
- u32 message_type;
+ struct pci_message message_type;
union win_slot_encoding wslot;
u32 status;
} __packed;
struct list_head children;
struct list_head dr_list;
- struct work_struct wrk;
struct msi_domain_info msi_info;
struct msi_controller msi_chip;
struct irq_domain *irq_domain;
+ struct retarget_msi_interrupt retarget_msi_interrupt_params;
+ spinlock_t retarget_msi_interrupt_lock;
};
/*
struct hv_dr_state {
struct list_head list_entry;
u32 device_count;
- struct pci_function_description func[1];
+ struct pci_function_description func[0];
};
enum hv_pcichild_state {
* for any message for which the completion packet contains a
* status and nothing else.
*/
-static
-void
-hv_pci_generic_compl(void *context, struct pci_response *resp,
- int resp_packet_size)
+static void hv_pci_generic_compl(void *context, struct pci_response *resp,
+ int resp_packet_size)
{
struct hv_pci_compl *comp_pkt = context;
if (resp_packet_size >= offsetofend(struct pci_response, status))
comp_pkt->completion_status = resp->status;
+ else
+ comp_pkt->completion_status = -1;
+
complete(&comp_pkt->host_event);
}
union win_slot_encoding wslot;
wslot.slot = 0;
- wslot.bits.func = PCI_SLOT(devfn) | (PCI_FUNC(devfn) << 5);
+ wslot.bits.dev = PCI_SLOT(devfn);
+ wslot.bits.func = PCI_FUNC(devfn);
return wslot.slot;
}
union win_slot_encoding slot_no;
slot_no.slot = wslot;
- return PCI_DEVFN(0, slot_no.bits.func);
+ return PCI_DEVFN(slot_no.bits.dev, slot_no.bits.func);
}
/*
struct pci_delete_interrupt *int_pkt;
struct {
struct pci_packet pkt;
- u8 buffer[sizeof(struct pci_delete_interrupt) -
- sizeof(struct pci_message)];
+ u8 buffer[sizeof(struct pci_delete_interrupt)];
} ctxt;
memset(&ctxt, 0, sizeof(ctxt));
int_pkt = (struct pci_delete_interrupt *)&ctxt.pkt.message;
- int_pkt->message_type.message_type =
+ int_pkt->message_type.type =
PCI_DELETE_INTERRUPT_MESSAGE;
int_pkt->wslot.slot = hpdev->desc.win_slot.slot;
int_pkt->int_desc = *int_desc;
return parent->chip->irq_set_affinity(parent, dest, force);
}
-void hv_irq_mask(struct irq_data *data)
+static void hv_irq_mask(struct irq_data *data)
{
pci_msi_mask_irq(data);
}
* is built out of this PCI bus's instance GUID and the function
* number of the device.
*/
-void hv_irq_unmask(struct irq_data *data)
+static void hv_irq_unmask(struct irq_data *data)
{
struct msi_desc *msi_desc = irq_data_get_msi_desc(data);
struct irq_cfg *cfg = irqd_cfg(data);
- struct retarget_msi_interrupt params;
+ struct retarget_msi_interrupt *params;
struct hv_pcibus_device *hbus;
struct cpumask *dest;
struct pci_bus *pbus;
struct pci_dev *pdev;
int cpu;
+ unsigned long flags;
dest = irq_data_get_affinity_mask(data);
pdev = msi_desc_to_pci_dev(msi_desc);
pbus = pdev->bus;
hbus = container_of(pbus->sysdata, struct hv_pcibus_device, sysdata);
- memset(¶ms, 0, sizeof(params));
- params.partition_id = HV_PARTITION_ID_SELF;
- params.source = 1; /* MSI(-X) */
- params.address = msi_desc->msg.address_lo;
- params.data = msi_desc->msg.data;
- params.device_id = (hbus->hdev->dev_instance.b[5] << 24) |
+ spin_lock_irqsave(&hbus->retarget_msi_interrupt_lock, flags);
+
+ params = &hbus->retarget_msi_interrupt_params;
+ memset(params, 0, sizeof(*params));
+ params->partition_id = HV_PARTITION_ID_SELF;
+ params->source = 1; /* MSI(-X) */
+ params->address = msi_desc->msg.address_lo;
+ params->data = msi_desc->msg.data;
+ params->device_id = (hbus->hdev->dev_instance.b[5] << 24) |
(hbus->hdev->dev_instance.b[4] << 16) |
(hbus->hdev->dev_instance.b[7] << 8) |
(hbus->hdev->dev_instance.b[6] & 0xf8) |
PCI_FUNC(pdev->devfn);
- params.vector = cfg->vector;
+ params->vector = cfg->vector;
for_each_cpu_and(cpu, dest, cpu_online_mask)
- params.vp_mask |= (1ULL << vmbus_cpu_number_to_vp_number(cpu));
+ params->vp_mask |= (1ULL << vmbus_cpu_number_to_vp_number(cpu));
- hv_do_hypercall(HVCALL_RETARGET_INTERRUPT, ¶ms, NULL);
+ hv_do_hypercall(HVCALL_RETARGET_INTERRUPT, params, NULL);
+
+ spin_unlock_irqrestore(&hbus->retarget_msi_interrupt_lock, flags);
pci_msi_unmask_irq(data);
}
struct cpumask *affinity;
struct {
struct pci_packet pkt;
- u8 buffer[sizeof(struct pci_create_interrupt) -
- sizeof(struct pci_message)];
+ u8 buffer[sizeof(struct pci_create_interrupt)];
} ctxt;
int cpu;
int ret;
ctxt.pkt.completion_func = hv_pci_compose_compl;
ctxt.pkt.compl_ctxt = ∁
int_pkt = (struct pci_create_interrupt *)&ctxt.pkt.message;
- int_pkt->message_type.message_type = PCI_CREATE_INTERRUPT_MESSAGE;
+ int_pkt->message_type.type = PCI_CREATE_INTERRUPT_MESSAGE;
int_pkt->wslot.slot = hpdev->desc.win_slot.slot;
int_pkt->int_desc.vector = cfg->vector;
int_pkt->int_desc.vector_count = 1;
sizeof(*int_pkt), (unsigned long)&ctxt.pkt,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
- if (!ret)
- wait_for_completion(&comp.comp_pkt.host_event);
+ if (ret)
+ goto free_int_desc;
+
+ wait_for_completion(&comp.comp_pkt.host_event);
if (comp.comp_pkt.completion_status < 0) {
dev_err(&hbus->hdev->device,
struct hv_pci_dev *hpdev;
struct pci_child_message *res_req;
struct q_res_req_compl comp_pkt;
- union {
- struct pci_packet init_packet;
- u8 buffer[0x100];
+ struct {
+ struct pci_packet init_packet;
+ u8 buffer[sizeof(struct pci_child_message)];
} pkt;
unsigned long flags;
int ret;
pkt.init_packet.compl_ctxt = &comp_pkt;
pkt.init_packet.completion_func = q_resource_requirements;
res_req = (struct pci_child_message *)&pkt.init_packet.message;
- res_req->message_type = PCI_QUERY_RESOURCE_REQUIREMENTS;
+ res_req->message_type.type = PCI_QUERY_RESOURCE_REQUIREMENTS;
res_req->wslot.slot = desc->win_slot.slot;
ret = vmbus_sendpacket(hbus->hdev->channel, res_req,
get_pcichild(hpdev, hv_pcidev_ref_initial);
get_pcichild(hpdev, hv_pcidev_ref_childlist);
spin_lock_irqsave(&hbus->device_list_lock, flags);
+
+ /*
+ * When a device is being added to the bus, we set the PCI domain
+ * number to be the device serial number, which is non-zero and
+ * unique on the same VM. The serial numbers start with 1, and
+ * increase by 1 for each device. So device names including this
+ * can have shorter names than based on the bus instance UUID.
+ * Only the first device serial number is used for domain, so the
+ * domain number will not change after the first device is added.
+ */
+ if (list_empty(&hbus->children))
+ hbus->sysdata.domain = desc->ser;
list_add_tail(&hpdev->list_entry, &hbus->children);
spin_unlock_irqrestore(&hbus->device_list_lock, flags);
return hpdev;
if (hpdev->reported_missing) {
found = true;
put_pcichild(hpdev, hv_pcidev_ref_childlist);
- list_del(&hpdev->list_entry);
- list_add_tail(&hpdev->list_entry, &removed);
+ list_move_tail(&hpdev->list_entry, &removed);
break;
}
}
int wslot;
struct {
struct pci_packet pkt;
- u8 buffer[sizeof(struct pci_eject_response) -
- sizeof(struct pci_message)];
+ u8 buffer[sizeof(struct pci_eject_response)];
} ctxt;
hpdev = container_of(work, struct hv_pci_dev, wrk);
pci_dev_put(pdev);
}
+ spin_lock_irqsave(&hpdev->hbus->device_list_lock, flags);
+ list_del(&hpdev->list_entry);
+ spin_unlock_irqrestore(&hpdev->hbus->device_list_lock, flags);
+
memset(&ctxt, 0, sizeof(ctxt));
ejct_pkt = (struct pci_eject_response *)&ctxt.pkt.message;
- ejct_pkt->message_type = PCI_EJECTION_COMPLETE;
+ ejct_pkt->message_type.type = PCI_EJECTION_COMPLETE;
ejct_pkt->wslot.slot = hpdev->desc.win_slot.slot;
vmbus_sendpacket(hpdev->hbus->hdev->channel, ejct_pkt,
sizeof(*ejct_pkt), (unsigned long)&ctxt.pkt,
VM_PKT_DATA_INBAND, 0);
- spin_lock_irqsave(&hpdev->hbus->device_list_lock, flags);
- list_del(&hpdev->list_entry);
- spin_unlock_irqrestore(&hpdev->hbus->device_list_lock, flags);
-
put_pcichild(hpdev, hv_pcidev_ref_childlist);
put_pcichild(hpdev, hv_pcidev_ref_pnp);
put_hvpcibus(hpdev->hbus);
case VM_PKT_DATA_INBAND:
new_message = (struct pci_incoming_message *)buffer;
- switch (new_message->message_type.message_type) {
+ switch (new_message->message_type.type) {
case PCI_BUS_RELATIONS:
bus_rel = (struct pci_bus_relations *)buffer;
default:
dev_warn(&hbus->hdev->device,
"Unimplemented protocol message %x\n",
- new_message->message_type.message_type);
+ new_message->message_type.type);
break;
}
break;
pkt->completion_func = hv_pci_generic_compl;
pkt->compl_ctxt = &comp_pkt;
version_req = (struct pci_version_request *)&pkt->message;
- version_req->message_type.message_type = PCI_QUERY_PROTOCOL_VERSION;
+ version_req->message_type.type = PCI_QUERY_PROTOCOL_VERSION;
version_req->protocol_version = PCI_PROTOCOL_VERSION_CURRENT;
ret = vmbus_sendpacket(hdev->channel, version_req,
pkt->completion_func = hv_pci_generic_compl;
pkt->compl_ctxt = &comp_pkt;
d0_entry = (struct pci_bus_d0_entry *)&pkt->message;
- d0_entry->message_type.message_type = PCI_BUS_D0ENTRY;
+ d0_entry->message_type.type = PCI_BUS_D0ENTRY;
d0_entry->mmio_base = hbus->mem_config->start;
ret = vmbus_sendpacket(hdev->channel, d0_entry, sizeof(*d0_entry),
return -ENOTEMPTY;
memset(&message, 0, sizeof(message));
- message.message_type = PCI_QUERY_BUS_RELATIONS;
+ message.type = PCI_QUERY_BUS_RELATIONS;
ret = vmbus_sendpacket(hdev->channel, &message, sizeof(message),
0, VM_PKT_DATA_INBAND, 0);
init_completion(&comp_pkt.host_event);
pkt->completion_func = hv_pci_generic_compl;
pkt->compl_ctxt = &comp_pkt;
- pkt->message.message_type = PCI_RESOURCES_ASSIGNED;
res_assigned = (struct pci_resources_assigned *)&pkt->message;
+ res_assigned->message_type.type = PCI_RESOURCES_ASSIGNED;
res_assigned->wslot.slot = hpdev->desc.win_slot.slot;
put_pcichild(hpdev, hv_pcidev_ref_by_slot);
continue;
memset(&pkt, 0, sizeof(pkt));
- pkt.message_type = PCI_RESOURCES_RELEASED;
+ pkt.message_type.type = PCI_RESOURCES_RELEASED;
pkt.wslot.slot = hpdev->desc.win_slot.slot;
put_pcichild(hpdev, hv_pcidev_ref_by_slot);
INIT_LIST_HEAD(&hbus->resources_for_children);
spin_lock_init(&hbus->config_lock);
spin_lock_init(&hbus->device_list_lock);
+ spin_lock_init(&hbus->retarget_msi_interrupt_lock);
sema_init(&hbus->enum_sem, 1);
init_completion(&hbus->remove_event);
return ret;
}
-/**
- * hv_pci_remove() - Remove routine for this VMBus channel
- * @hdev: VMBus's tracking struct for this root PCI bus
- *
- * Return: 0 on success, -errno on failure
- */
-static int hv_pci_remove(struct hv_device *hdev)
+static void hv_pci_bus_exit(struct hv_device *hdev)
{
- int ret;
- struct hv_pcibus_device *hbus;
- union {
+ struct hv_pcibus_device *hbus = hv_get_drvdata(hdev);
+ struct {
struct pci_packet teardown_packet;
- u8 buffer[0x100];
+ u8 buffer[sizeof(struct pci_message)];
} pkt;
struct pci_bus_relations relations;
struct hv_pci_compl comp_pkt;
+ int ret;
- hbus = hv_get_drvdata(hdev);
+ /*
+ * After the host sends the RESCIND_CHANNEL message, it doesn't
+ * access the per-channel ringbuffer any longer.
+ */
+ if (hdev->channel->rescind)
+ return;
+
+ /* Delete any children which might still exist. */
+ memset(&relations, 0, sizeof(relations));
+ hv_pci_devices_present(hbus, &relations);
+
+ ret = hv_send_resources_released(hdev);
+ if (ret)
+ dev_err(&hdev->device,
+ "Couldn't send resources released packet(s)\n");
memset(&pkt.teardown_packet, 0, sizeof(pkt.teardown_packet));
init_completion(&comp_pkt.host_event);
pkt.teardown_packet.completion_func = hv_pci_generic_compl;
pkt.teardown_packet.compl_ctxt = &comp_pkt;
- pkt.teardown_packet.message.message_type = PCI_BUS_D0EXIT;
+ pkt.teardown_packet.message[0].type = PCI_BUS_D0EXIT;
ret = vmbus_sendpacket(hdev->channel, &pkt.teardown_packet.message,
sizeof(struct pci_message),
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
if (!ret)
wait_for_completion_timeout(&comp_pkt.host_event, 10 * HZ);
+}
+/**
+ * hv_pci_remove() - Remove routine for this VMBus channel
+ * @hdev: VMBus's tracking struct for this root PCI bus
+ *
+ * Return: 0 on success, -errno on failure
+ */
+static int hv_pci_remove(struct hv_device *hdev)
+{
+ struct hv_pcibus_device *hbus;
+
+ hbus = hv_get_drvdata(hdev);
if (hbus->state == hv_pcibus_installed) {
/* Remove the bus from PCI's point of view. */
pci_lock_rescan_remove();
pci_unlock_rescan_remove();
}
- ret = hv_send_resources_released(hdev);
- if (ret)
- dev_err(&hdev->device,
- "Couldn't send resources released packet(s)\n");
+ hv_pci_bus_exit(hdev);
vmbus_close(hdev->channel);
- /* Delete any children which might still exist. */
- memset(&relations, 0, sizeof(relations));
- hv_pci_devices_present(hbus, &relations);
-
iounmap(hbus->cfg_addr);
hv_free_config_window(hbus);
pci_free_resource_list(&hbus->resources_for_children);
projects / thirdparty / kernel / stable.git / blobdiff