summaryrefslogtreecommitdiff
path: root/drivers/pci/host/pci-hyperv.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pci/host/pci-hyperv.c')
-rw-r--r--drivers/pci/host/pci-hyperv.c100
1 files changed, 61 insertions, 39 deletions
diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c
index 763ff8745828..3efcc7bdc5fb 100644
--- a/drivers/pci/host/pci-hyperv.c
+++ b/drivers/pci/host/pci-hyperv.c
@@ -378,6 +378,8 @@ struct hv_pcibus_device {
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;
};
/*
@@ -755,7 +757,7 @@ static int hv_set_affinity(struct irq_data *data, const struct cpumask *dest,
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);
}
@@ -770,38 +772,44 @@ void hv_irq_mask(struct irq_data *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(&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) |
+ 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, &params, NULL);
+ hv_do_hypercall(HVCALL_RETARGET_INTERRUPT, params, NULL);
+
+ spin_unlock_irqrestore(&hbus->retarget_msi_interrupt_lock, flags);
pci_msi_unmask_irq(data);
}
@@ -1271,9 +1279,9 @@ static struct hv_pci_dev *new_pcichild_device(struct hv_pcibus_device *hbus,
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;
@@ -1582,6 +1590,10 @@ static void hv_eject_device_work(struct work_struct *work)
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.type = PCI_EJECTION_COMPLETE;
@@ -1590,10 +1602,6 @@ static void hv_eject_device_work(struct work_struct *work)
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);
@@ -2186,6 +2194,7 @@ static int hv_pci_probe(struct hv_device *hdev,
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);
@@ -2266,24 +2275,32 @@ free_bus:
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);
@@ -2298,7 +2315,19 @@ static int hv_pci_remove(struct hv_device *hdev)
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();
@@ -2307,17 +2336,10 @@ static int hv_pci_remove(struct hv_device *hdev)
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);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-25 20:38:11 +0300