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vDPA/ifcvf: detect and use the onboard number of queues directly

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To enable this multi-queue feature for ifcvf, this commit
intends to detect and use the onboard number of queues
directly than IFCVF_MAX_QUEUE_PAIRS = 1 (removed)

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Link: https://lore.kernel.org/r/20210818095714.3220-2-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Zhu Lingshan 2021-08-18 17:57:13 +08:00 committed by Michael S. Tsirkin
parent 6b5df347c6
commit 2ddae773c9
3 changed files with 21 additions and 18 deletions
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8
drivers/vdpa/ifcvf/ifcvf_base.c
View File

@ -158,7 +158,9 @@ next:
return -EIO;
}
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
hw->nr_vring = ifc_ioread16(&hw->common_cfg->num_queues);
for (i = 0; i < hw->nr_vring; i++) {
ifc_iowrite16(i, &hw->common_cfg->queue_select);
notify_off = ifc_ioread16(&hw->common_cfg->queue_notify_off);
hw->vring[i].notify_addr = hw->notify_base +
@ -304,7 +306,7 @@ u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid)
u32 q_pair_id;
ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
q_pair_id = qid / (IFCVF_MAX_QUEUE_PAIRS * 2);
q_pair_id = qid / hw->nr_vring;
avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2];
last_avail_idx = ifc_ioread16(avail_idx_addr);
@ -318,7 +320,7 @@ int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num)
u32 q_pair_id;
ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
q_pair_id = qid / (IFCVF_MAX_QUEUE_PAIRS * 2);
q_pair_id = qid / hw->nr_vring;
avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2];
hw->vring[qid].last_avail_idx = num;
ifc_iowrite16(num, avail_idx_addr);

10
drivers/vdpa/ifcvf/ifcvf_base.h
View File

@ -31,8 +31,8 @@
(1ULL << VIRTIO_F_ACCESS_PLATFORM) | \
(1ULL << VIRTIO_NET_F_MRG_RXBUF))
/* Only one queue pair for now. */
#define IFCVF_MAX_QUEUE_PAIRS 1
/* Max 8 data queue pairs(16 queues) and one control vq for now. */
#define IFCVF_MAX_QUEUES 17
#define IFCVF_QUEUE_ALIGNMENT PAGE_SIZE
#define IFCVF_QUEUE_MAX 32768
@ -51,8 +51,6 @@
#define ifcvf_private_to_vf(adapter) \
(&((struct ifcvf_adapter *)adapter)->vf)
#define IFCVF_MAX_INTR (IFCVF_MAX_QUEUE_PAIRS * 2 + 1)
struct vring_info {
u64 desc;
u64 avail;
@ -83,7 +81,7 @@ struct ifcvf_hw {
u32 dev_type;
struct virtio_pci_common_cfg __iomem *common_cfg;
void __iomem *net_cfg;
struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2];
struct vring_info vring[IFCVF_MAX_QUEUES];
void __iomem * const *base;
char config_msix_name[256];
struct vdpa_callback config_cb;
@ -103,7 +101,7 @@ struct ifcvf_vring_lm_cfg {
struct ifcvf_lm_cfg {
u8 reserved[IFCVF_LM_RING_STATE_OFFSET];
struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUE_PAIRS];
struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUES];
};
struct ifcvf_vdpa_mgmt_dev {

21
drivers/vdpa/ifcvf/ifcvf_main.c
View File

@ -63,9 +63,13 @@ static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
struct pci_dev *pdev = adapter->pdev;
struct ifcvf_hw *vf = &adapter->vf;
int vector, i, ret, irq;
u16 max_intr;
ret = pci_alloc_irq_vectors(pdev, IFCVF_MAX_INTR,
IFCVF_MAX_INTR, PCI_IRQ_MSIX);
/* all queues and config interrupt */
max_intr = vf->nr_vring + 1;
ret = pci_alloc_irq_vectors(pdev, max_intr,
max_intr, PCI_IRQ_MSIX);
if (ret < 0) {
IFCVF_ERR(pdev, "Failed to alloc IRQ vectors\n");
return ret;
@ -83,7 +87,7 @@ static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
return ret;
}
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
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;
@ -112,7 +116,6 @@ static int ifcvf_start_datapath(void *private)
u8 status;
int ret;
vf->nr_vring = IFCVF_MAX_QUEUE_PAIRS * 2;
ret = ifcvf_start_hw(vf);
if (ret < 0) {
status = ifcvf_get_status(vf);
@ -128,7 +131,7 @@ static int ifcvf_stop_datapath(void *private)
struct ifcvf_hw *vf = ifcvf_private_to_vf(private);
int i;
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++)
for (i = 0; i < vf->nr_vring; i++)
vf->vring[i].cb.callback = NULL;
ifcvf_stop_hw(vf);
@ -141,7 +144,7 @@ static void ifcvf_reset_vring(struct ifcvf_adapter *adapter)
struct ifcvf_hw *vf = ifcvf_private_to_vf(adapter);
int i;
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
for (i = 0; i < vf->nr_vring; i++) {
vf->vring[i].last_avail_idx = 0;
vf->vring[i].desc = 0;
vf->vring[i].avail = 0;
@ -227,7 +230,7 @@ static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
if ((status_old & VIRTIO_CONFIG_S_DRIVER_OK) &&
!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
ifcvf_stop_datapath(adapter);
ifcvf_free_irq(adapter, IFCVF_MAX_QUEUE_PAIRS * 2);
ifcvf_free_irq(adapter, vf->nr_vring);
}
if (status == 0) {
@ -526,13 +529,13 @@ static int ifcvf_vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name)
goto err;
}
for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++)
for (i = 0; i < vf->nr_vring; i++)
vf->vring[i].irq = -EINVAL;
vf->hw_features = ifcvf_get_hw_features(vf);
adapter->vdpa.mdev = &ifcvf_mgmt_dev->mdev;
ret = _vdpa_register_device(&adapter->vdpa, IFCVF_MAX_QUEUE_PAIRS * 2);
ret = _vdpa_register_device(&adapter->vdpa, vf->nr_vring);
if (ret) {
IFCVF_ERR(pdev, "Failed to register to vDPA bus");
goto err;