vDPA/ifcvf: implement shared IRQ feature
On some platforms/devices, there may not be enough MSI vectors allocated for the virtqueues and config changes. In such a case, the interrupt sources(virtqueues, config changes) must share an IRQ/vector, to avoid initialization failures, keep the device functional. This commit handles three cases: (1) number of the allocated vectors == the number of virtqueues + 1 (config changes), every virtqueue and the config interrupt has a separated vector/IRQ, the best and the most likely case. (2) number of the allocated vectors is less than the best case, but greater than 1. In this case, all virtqueues share a vector/IRQ, the config interrupt has a separated vector/IRQ (3) only one vector is allocated, in this case, the virtqueues and the config interrupt share a vector/IRQ. The worst and most unlikely case. Otherwise, it needs to fail. This commit introduces some helper functions: ifcvf_set_vq_vector() and ifcvf_set_config_vector() sets virtqueue vector and config vector in the device config space, so that the device can send interrupt DMA. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Link: https://lore.kernel.org/r/20220222115428.998334-5-lingshan.zhu@intel.com Signed-off-by: Tom Rix <trix@redhat.com> Link: https://lore.kernel.org/r/20220315124130.1710030-1-trix@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhu Lingshan
Michael S. Tsirkin
Родитель
ad5c5690de
Коммит
9b3e814834
|
|
@ -15,6 +15,26 @@ struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw)
|
|||
return container_of(hw, struct ifcvf_adapter, vf);
|
||||
}
|
||||
|
||||
u16 ifcvf_set_vq_vector(struct ifcvf_hw *hw, u16 qid, int vector)
|
||||
{
|
||||
struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
|
||||
|
||||
vp_iowrite16(qid, &cfg->queue_select);
|
||||
vp_iowrite16(vector, &cfg->queue_msix_vector);
|
||||
|
||||
return vp_ioread16(&cfg->queue_msix_vector);
|
||||
}
|
||||
|
||||
u16 ifcvf_set_config_vector(struct ifcvf_hw *hw, int vector)
|
||||
{
|
||||
struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
|
||||
|
||||
cfg = hw->common_cfg;
|
||||
vp_iowrite16(vector, &cfg->msix_config);
|
||||
|
||||
return vp_ioread16(&cfg->msix_config);
|
||||
}
|
||||
|
||||
static void __iomem *get_cap_addr(struct ifcvf_hw *hw,
|
||||
struct virtio_pci_cap *cap)
|
||||
{
|
||||
|
|
@ -131,6 +151,7 @@ next:
|
|||
notify_off * hw->notify_off_multiplier;
|
||||
hw->vring[i].notify_pa = hw->notify_base_pa +
|
||||
notify_off * hw->notify_off_multiplier;
|
||||
hw->vring[i].irq = -EINVAL;
|
||||
}
|
||||
|
||||
hw->lm_cfg = hw->base[IFCVF_LM_BAR];
|
||||
|
|
@ -140,6 +161,9 @@ next:
|
|||
hw->common_cfg, hw->notify_base, hw->isr,
|
||||
hw->dev_cfg, hw->notify_off_multiplier);
|
||||
|
||||
hw->vqs_reused_irq = -EINVAL;
|
||||
hw->config_irq = -EINVAL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -321,13 +345,6 @@ static int ifcvf_hw_enable(struct ifcvf_hw *hw)
|
|||
|
||||
ifcvf = vf_to_adapter(hw);
|
||||
cfg = hw->common_cfg;
|
||||
vp_iowrite16(IFCVF_MSI_CONFIG_OFF, &cfg->msix_config);
|
||||
|
||||
if (vp_ioread16(&cfg->msix_config) == VIRTIO_MSI_NO_VECTOR) {
|
||||
IFCVF_ERR(ifcvf->pdev, "No msix vector for device config\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
for (i = 0; i < hw->nr_vring; i++) {
|
||||
if (!hw->vring[i].ready)
|
||||
break;
|
||||
|
|
@ -340,15 +357,6 @@ static int ifcvf_hw_enable(struct ifcvf_hw *hw)
|
|||
vp_iowrite64_twopart(hw->vring[i].used, &cfg->queue_used_lo,
|
||||
&cfg->queue_used_hi);
|
||||
vp_iowrite16(hw->vring[i].size, &cfg->queue_size);
|
||||
vp_iowrite16(i + IFCVF_MSI_QUEUE_OFF, &cfg->queue_msix_vector);
|
||||
|
||||
if (vp_ioread16(&cfg->queue_msix_vector) ==
|
||||
VIRTIO_MSI_NO_VECTOR) {
|
||||
IFCVF_ERR(ifcvf->pdev,
|
||||
"No msix vector for queue %u\n", i);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ifcvf_set_vq_state(hw, i, hw->vring[i].last_avail_idx);
|
||||
vp_iowrite16(1, &cfg->queue_enable);
|
||||
}
|
||||
|
|
@ -362,14 +370,10 @@ static void ifcvf_hw_disable(struct ifcvf_hw *hw)
|
|||
u32 i;
|
||||
|
||||
cfg = hw->common_cfg;
|
||||
vp_iowrite16(VIRTIO_MSI_NO_VECTOR, &cfg->msix_config);
|
||||
|
||||
ifcvf_set_config_vector(hw, VIRTIO_MSI_NO_VECTOR);
|
||||
for (i = 0; i < hw->nr_vring; i++) {
|
||||
vp_iowrite16(i, &cfg->queue_select);
|
||||
vp_iowrite16(VIRTIO_MSI_NO_VECTOR, &cfg->queue_msix_vector);
|
||||
ifcvf_set_vq_vector(hw, i, VIRTIO_MSI_NO_VECTOR);
|
||||
}
|
||||
|
||||
vp_ioread16(&cfg->queue_msix_vector);
|
||||
}
|
||||
|
||||
int ifcvf_start_hw(struct ifcvf_hw *hw)
|
||||
|
|
|
|||
|
|
@ -28,8 +28,6 @@
|
|||
|
||||
#define IFCVF_QUEUE_ALIGNMENT PAGE_SIZE
|
||||
#define IFCVF_QUEUE_MAX 32768
|
||||
#define IFCVF_MSI_CONFIG_OFF 0
|
||||
#define IFCVF_MSI_QUEUE_OFF 1
|
||||
#define IFCVF_PCI_MAX_RESOURCE 6
|
||||
|
||||
#define IFCVF_LM_CFG_SIZE 0x40
|
||||
|
|
@ -43,6 +41,13 @@
|
|||
#define ifcvf_private_to_vf(adapter) \
|
||||
(&((struct ifcvf_adapter *)adapter)->vf)
|
||||
|
||||
/* all vqs and config interrupt has its own vector */
|
||||
#define MSIX_VECTOR_PER_VQ_AND_CONFIG 1
|
||||
/* all vqs share a vector, and config interrupt has a separate vector */
|
||||
#define MSIX_VECTOR_SHARED_VQ_AND_CONFIG 2
|
||||
/* all vqs and config interrupt share a vector */
|
||||
#define MSIX_VECTOR_DEV_SHARED 3
|
||||
|
||||
struct vring_info {
|
||||
u64 desc;
|
||||
u64 avail;
|
||||
|
|
@ -77,9 +82,11 @@ struct ifcvf_hw {
|
|||
void __iomem * const *base;
|
||||
char config_msix_name[256];
|
||||
struct vdpa_callback config_cb;
|
||||
unsigned int config_irq;
|
||||
int config_irq;
|
||||
int vqs_reused_irq;
|
||||
/* virtio-net or virtio-blk device config size */
|
||||
u32 config_size;
|
||||
u8 msix_vector_status;
|
||||
};
|
||||
|
||||
struct ifcvf_adapter {
|
||||
|
|
@ -124,4 +131,6 @@ int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
|
|||
struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
|
||||
int ifcvf_probed_virtio_net(struct ifcvf_hw *hw);
|
||||
u32 ifcvf_get_config_size(struct ifcvf_hw *hw);
|
||||
u16 ifcvf_set_vq_vector(struct ifcvf_hw *hw, u16 qid, int vector);
|
||||
u16 ifcvf_set_config_vector(struct ifcvf_hw *hw, int vector);
|
||||
#endif /* _IFCVF_H_ */
|
||||
|
|
|
|||
|
|
@ -27,7 +27,7 @@ static irqreturn_t ifcvf_config_changed(int irq, void *arg)
|
|||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t ifcvf_intr_handler(int irq, void *arg)
|
||||
static irqreturn_t ifcvf_vq_intr_handler(int irq, void *arg)
|
||||
{
|
||||
struct vring_info *vring = arg;
|
||||
|
||||
|
|
@ -37,24 +37,98 @@ static irqreturn_t ifcvf_intr_handler(int irq, void *arg)
|
|||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t ifcvf_vqs_reused_intr_handler(int irq, void *arg)
|
||||
{
|
||||
struct ifcvf_hw *vf = arg;
|
||||
struct vring_info *vring;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < vf->nr_vring; i++) {
|
||||
vring = &vf->vring[i];
|
||||
if (vring->cb.callback)
|
||||
vring->cb.callback(vring->cb.private);
|
||||
}
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t ifcvf_dev_intr_handler(int irq, void *arg)
|
||||
{
|
||||
struct ifcvf_hw *vf = arg;
|
||||
u8 isr;
|
||||
|
||||
isr = vp_ioread8(vf->isr);
|
||||
if (isr & VIRTIO_PCI_ISR_CONFIG)
|
||||
ifcvf_config_changed(irq, arg);
|
||||
|
||||
return ifcvf_vqs_reused_intr_handler(irq, arg);
|
||||
}
|
||||
|
||||
static void ifcvf_free_irq_vectors(void *data)
|
||||
{
|
||||
pci_free_irq_vectors(data);
|
||||
}
|
||||
|
||||
static void ifcvf_free_irq(struct ifcvf_adapter *adapter, int queues)
|
||||
static void ifcvf_free_per_vq_irq(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
struct ifcvf_hw *vf = &adapter->vf;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < vf->nr_vring; i++) {
|
||||
if (vf->vring[i].irq != -EINVAL) {
|
||||
devm_free_irq(&pdev->dev, vf->vring[i].irq, &vf->vring[i]);
|
||||
vf->vring[i].irq = -EINVAL;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 0; i < queues; i++) {
|
||||
devm_free_irq(&pdev->dev, vf->vring[i].irq, &vf->vring[i]);
|
||||
vf->vring[i].irq = -EINVAL;
|
||||
static void ifcvf_free_vqs_reused_irq(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
struct ifcvf_hw *vf = &adapter->vf;
|
||||
|
||||
if (vf->vqs_reused_irq != -EINVAL) {
|
||||
devm_free_irq(&pdev->dev, vf->vqs_reused_irq, vf);
|
||||
vf->vqs_reused_irq = -EINVAL;
|
||||
}
|
||||
|
||||
devm_free_irq(&pdev->dev, vf->config_irq, vf);
|
||||
}
|
||||
|
||||
static void ifcvf_free_vq_irq(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct ifcvf_hw *vf = &adapter->vf;
|
||||
|
||||
if (vf->msix_vector_status == MSIX_VECTOR_PER_VQ_AND_CONFIG)
|
||||
ifcvf_free_per_vq_irq(adapter);
|
||||
else
|
||||
ifcvf_free_vqs_reused_irq(adapter);
|
||||
}
|
||||
|
||||
static void ifcvf_free_config_irq(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
struct ifcvf_hw *vf = &adapter->vf;
|
||||
|
||||
if (vf->config_irq == -EINVAL)
|
||||
return;
|
||||
|
||||
/* If the irq is shared by all vqs and the config interrupt,
|
||||
* it is already freed in ifcvf_free_vq_irq, so here only
|
||||
* need to free config irq when msix_vector_status != MSIX_VECTOR_DEV_SHARED
|
||||
*/
|
||||
if (vf->msix_vector_status != MSIX_VECTOR_DEV_SHARED) {
|
||||
devm_free_irq(&pdev->dev, vf->config_irq, vf);
|
||||
vf->config_irq = -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
static void ifcvf_free_irq(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
|
||||
ifcvf_free_vq_irq(adapter);
|
||||
ifcvf_free_config_irq(adapter);
|
||||
ifcvf_free_irq_vectors(pdev);
|
||||
}
|
||||
|
||||
|
|
@ -86,47 +160,200 @@ static int ifcvf_alloc_vectors(struct ifcvf_adapter *adapter)
|
|||
return ret;
|
||||
}
|
||||
|
||||
static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
|
||||
static int ifcvf_request_per_vq_irq(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
struct ifcvf_hw *vf = &adapter->vf;
|
||||
int vector, nvectors, i, ret, irq;
|
||||
int i, vector, ret, irq;
|
||||
|
||||
nvectors = ifcvf_alloc_vectors(adapter);
|
||||
if (nvectors <= 0)
|
||||
return -EFAULT;
|
||||
vf->vqs_reused_irq = -EINVAL;
|
||||
for (i = 0; i < vf->nr_vring; i++) {
|
||||
snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n", pci_name(pdev), i);
|
||||
vector = i;
|
||||
irq = pci_irq_vector(pdev, vector);
|
||||
ret = devm_request_irq(&pdev->dev, irq,
|
||||
ifcvf_vq_intr_handler, 0,
|
||||
vf->vring[i].msix_name,
|
||||
&vf->vring[i]);
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev, "Failed to request irq for vq %d\n", i);
|
||||
goto err;
|
||||
}
|
||||
|
||||
vf->vring[i].irq = irq;
|
||||
ret = ifcvf_set_vq_vector(vf, i, vector);
|
||||
if (ret == VIRTIO_MSI_NO_VECTOR) {
|
||||
IFCVF_ERR(pdev, "No msix vector for vq %u\n", i);
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
err:
|
||||
ifcvf_free_irq(adapter);
|
||||
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
static int ifcvf_request_vqs_reused_irq(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
struct ifcvf_hw *vf = &adapter->vf;
|
||||
int i, vector, ret, irq;
|
||||
|
||||
vector = 0;
|
||||
snprintf(vf->vring[0].msix_name, 256, "ifcvf[%s]-vqs-reused-irq\n", pci_name(pdev));
|
||||
irq = pci_irq_vector(pdev, vector);
|
||||
ret = devm_request_irq(&pdev->dev, irq,
|
||||
ifcvf_vqs_reused_intr_handler, 0,
|
||||
vf->vring[0].msix_name, vf);
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev, "Failed to request reused irq for the device\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
vf->vqs_reused_irq = irq;
|
||||
for (i = 0; i < vf->nr_vring; i++) {
|
||||
vf->vring[i].irq = -EINVAL;
|
||||
ret = ifcvf_set_vq_vector(vf, i, vector);
|
||||
if (ret == VIRTIO_MSI_NO_VECTOR) {
|
||||
IFCVF_ERR(pdev, "No msix vector for vq %u\n", i);
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
err:
|
||||
ifcvf_free_irq(adapter);
|
||||
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
static int ifcvf_request_dev_irq(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
struct ifcvf_hw *vf = &adapter->vf;
|
||||
int i, vector, ret, irq;
|
||||
|
||||
vector = 0;
|
||||
snprintf(vf->vring[0].msix_name, 256, "ifcvf[%s]-dev-irq\n", pci_name(pdev));
|
||||
irq = pci_irq_vector(pdev, vector);
|
||||
ret = devm_request_irq(&pdev->dev, irq,
|
||||
ifcvf_dev_intr_handler, 0,
|
||||
vf->vring[0].msix_name, vf);
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev, "Failed to request irq for the device\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
vf->vqs_reused_irq = irq;
|
||||
for (i = 0; i < vf->nr_vring; i++) {
|
||||
vf->vring[i].irq = -EINVAL;
|
||||
ret = ifcvf_set_vq_vector(vf, i, vector);
|
||||
if (ret == VIRTIO_MSI_NO_VECTOR) {
|
||||
IFCVF_ERR(pdev, "No msix vector for vq %u\n", i);
|
||||
goto err;
|
||||
}
|
||||
}
|
||||
|
||||
vf->config_irq = irq;
|
||||
ret = ifcvf_set_config_vector(vf, vector);
|
||||
if (ret == VIRTIO_MSI_NO_VECTOR) {
|
||||
IFCVF_ERR(pdev, "No msix vector for device config\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
err:
|
||||
ifcvf_free_irq(adapter);
|
||||
|
||||
return -EFAULT;
|
||||
|
||||
}
|
||||
|
||||
static int ifcvf_request_vq_irq(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct ifcvf_hw *vf = &adapter->vf;
|
||||
int ret;
|
||||
|
||||
if (vf->msix_vector_status == MSIX_VECTOR_PER_VQ_AND_CONFIG)
|
||||
ret = ifcvf_request_per_vq_irq(adapter);
|
||||
else
|
||||
ret = ifcvf_request_vqs_reused_irq(adapter);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ifcvf_request_config_irq(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
struct ifcvf_hw *vf = &adapter->vf;
|
||||
int config_vector, ret;
|
||||
|
||||
if (vf->msix_vector_status == MSIX_VECTOR_DEV_SHARED)
|
||||
return 0;
|
||||
|
||||
if (vf->msix_vector_status == MSIX_VECTOR_PER_VQ_AND_CONFIG)
|
||||
/* vector 0 ~ vf->nr_vring for vqs, num vf->nr_vring vector for config interrupt */
|
||||
config_vector = vf->nr_vring;
|
||||
|
||||
if (vf->msix_vector_status == MSIX_VECTOR_SHARED_VQ_AND_CONFIG)
|
||||
/* vector 0 for vqs and 1 for config interrupt */
|
||||
config_vector = 1;
|
||||
|
||||
snprintf(vf->config_msix_name, 256, "ifcvf[%s]-config\n",
|
||||
pci_name(pdev));
|
||||
vector = 0;
|
||||
vf->config_irq = pci_irq_vector(pdev, vector);
|
||||
vf->config_irq = pci_irq_vector(pdev, config_vector);
|
||||
ret = devm_request_irq(&pdev->dev, vf->config_irq,
|
||||
ifcvf_config_changed, 0,
|
||||
vf->config_msix_name, vf);
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev, "Failed to request config irq\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
ret = ifcvf_set_config_vector(vf, config_vector);
|
||||
if (ret == VIRTIO_MSI_NO_VECTOR) {
|
||||
IFCVF_ERR(pdev, "No msix vector for device config\n");
|
||||
goto err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
err:
|
||||
ifcvf_free_irq(adapter);
|
||||
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
|
||||
{
|
||||
struct ifcvf_hw *vf = &adapter->vf;
|
||||
int nvectors, ret, max_intr;
|
||||
|
||||
nvectors = ifcvf_alloc_vectors(adapter);
|
||||
if (nvectors <= 0)
|
||||
return -EFAULT;
|
||||
|
||||
vf->msix_vector_status = MSIX_VECTOR_PER_VQ_AND_CONFIG;
|
||||
max_intr = vf->nr_vring + 1;
|
||||
if (nvectors < max_intr)
|
||||
vf->msix_vector_status = MSIX_VECTOR_SHARED_VQ_AND_CONFIG;
|
||||
|
||||
if (nvectors == 1) {
|
||||
vf->msix_vector_status = MSIX_VECTOR_DEV_SHARED;
|
||||
ret = ifcvf_request_dev_irq(adapter);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
for (i = 0; i < vf->nr_vring; i++) {
|
||||
snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n",
|
||||
pci_name(pdev), i);
|
||||
vector = i + IFCVF_MSI_QUEUE_OFF;
|
||||
irq = pci_irq_vector(pdev, vector);
|
||||
ret = devm_request_irq(&pdev->dev, irq,
|
||||
ifcvf_intr_handler, 0,
|
||||
vf->vring[i].msix_name,
|
||||
&vf->vring[i]);
|
||||
if (ret) {
|
||||
IFCVF_ERR(pdev,
|
||||
"Failed to request irq for vq %d\n", i);
|
||||
ifcvf_free_irq(adapter, i);
|
||||
ret = ifcvf_request_vq_irq(adapter);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return ret;
|
||||
}
|
||||
ret = ifcvf_request_config_irq(adapter);
|
||||
|
||||
vf->vring[i].irq = irq;
|
||||
}
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -284,7 +511,7 @@ static int ifcvf_vdpa_reset(struct vdpa_device *vdpa_dev)
|
|||
|
||||
if (status_old & VIRTIO_CONFIG_S_DRIVER_OK) {
|
||||
ifcvf_stop_datapath(adapter);
|
||||
ifcvf_free_irq(adapter, vf->nr_vring);
|
||||
ifcvf_free_irq(adapter);
|
||||
}
|
||||
|
||||
ifcvf_reset_vring(adapter);
|
||||
|
|
@ -431,7 +658,10 @@ static int ifcvf_vdpa_get_vq_irq(struct vdpa_device *vdpa_dev,
|
|||
{
|
||||
struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
|
||||
|
||||
return vf->vring[qid].irq;
|
||||
if (vf->vqs_reused_irq < 0)
|
||||
return vf->vring[qid].irq;
|
||||
else
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static struct vdpa_notification_area ifcvf_get_vq_notification(struct vdpa_device *vdpa_dev,
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче