vDPA/ifcvf: implement new accessors for vq_state

This commit implements a better layout of the
live migration bar, therefore the accessors for virtqueue
state have been refactored.

This commit also add a comment to the probing-ids list,
indicating this driver drives F2000X-PL virtio-net

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20230612151420.1019504-4-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Author: Zhu Lingshan

drivers/vdpa/ifcvf/ifcvf_base.c

@@ -328,30 +328,19 @@ void ifcvf_set_driver_features(struct ifcvf_hw *hw, u64 features)
 
 u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid)
 {
-	struct ifcvf_lm_cfg __iomem *ifcvf_lm;
-	void __iomem *avail_idx_addr;
+	struct ifcvf_lm_cfg  __iomem *lm_cfg = hw->lm_cfg;
 	u16 last_avail_idx;
-	u32 q_pair_id;
 
-	ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
-	q_pair_id = qid / 2;
-	avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2];
-	last_avail_idx = vp_ioread16(avail_idx_addr);
+	last_avail_idx = vp_ioread16(&lm_cfg->vq_state_region + qid * 2);
 
 	return last_avail_idx;
 }
 
 int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num)
 {
-	struct ifcvf_lm_cfg __iomem *ifcvf_lm;
-	void __iomem *avail_idx_addr;
-	u32 q_pair_id;
-
-	ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
-	q_pair_id = qid / 2;
-	avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2];
-	hw->vring[qid].last_avail_idx = num;
-	vp_iowrite16(num, avail_idx_addr);
+	struct ifcvf_lm_cfg  __iomem *lm_cfg = hw->lm_cfg;
+
+	vp_iowrite16(num, &lm_cfg->vq_state_region + qid * 2);
 
 	return 0;
 }

drivers/vdpa/ifcvf/ifcvf_base.h

@@ -24,14 +24,9 @@
 #define N3000_DEVICE_ID		0x1041
 #define N3000_SUBSYS_DEVICE_ID	0x001A
 
-/* 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_PCI_MAX_RESOURCE	6
 
-#define IFCVF_LM_CFG_SIZE		0x40
-#define IFCVF_LM_RING_STATE_OFFSET	0x20
 #define IFCVF_LM_BAR			4
 
 #define IFCVF_ERR(pdev, fmt, ...)	dev_err(&pdev->dev, fmt, ##__VA_ARGS__)
@@ -54,10 +49,18 @@ struct vring_info {
 	char msix_name[256];
 };
 
+struct ifcvf_lm_cfg {
+	__le64 control;
+	__le64 status;
+	__le64 lm_mem_log_start_addr;
+	__le64 lm_mem_log_end_addr;
+	__le16 vq_state_region;
+};
+
 struct ifcvf_hw {
 	u8 __iomem *isr;
 	/* Live migration */
-	u8 __iomem *lm_cfg;
+	struct ifcvf_lm_cfg  __iomem *lm_cfg;
 	/* Notification bar number */
 	u8 notify_bar;
 	u8 msix_vector_status;
@@ -92,16 +95,6 @@ struct ifcvf_adapter {
 	struct ifcvf_hw *vf;
 };
 
-struct ifcvf_vring_lm_cfg {
-	u32 idx_addr[2];
-	u8 reserved[IFCVF_LM_CFG_SIZE - 8];
-};
-
-struct ifcvf_lm_cfg {
-	u8 reserved[IFCVF_LM_RING_STATE_OFFSET];
-	struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUES];
-};
-
 struct ifcvf_vdpa_mgmt_dev {
 	struct vdpa_mgmt_dev mdev;
 	struct ifcvf_hw vf;

drivers/vdpa/ifcvf/ifcvf_main.c

@@ -853,7 +853,9 @@ static struct pci_device_id ifcvf_pci_ids[] = {
 			 N3000_DEVICE_ID,
 			 PCI_VENDOR_ID_INTEL,
 			 N3000_SUBSYS_DEVICE_ID) },
-	/* C5000X-PL network device */
+	/* C5000X-PL network device
+	 * F2000X-PL network device
+	 */
 	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_REDHAT_QUMRANET,
 			 VIRTIO_TRANS_ID_NET,
 			 PCI_VENDOR_ID_INTEL,