drivers/scsi/snic/vnic_dev.c

Source file repositories/reference/linux-study-clean/drivers/scsi/snic/vnic_dev.c

File Facts

System
Linux kernel
Corpus path
drivers/scsi/snic/vnic_dev.c
Extension
.c
Size
16325 bytes
Lines
740
Domain
Driver Families
Bucket
drivers/scsi
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct devcmd2_controller {
	struct vnic_wq_ctrl __iomem *wq_ctrl;
	struct vnic_dev_ring results_ring;
	struct vnic_wq wq;
	struct vnic_devcmd2 *cmd_ring;
	struct devcmd2_result *result;
	u16 next_result;
	u16 result_size;
	int color;
};

struct vnic_res {
	void __iomem *vaddr;
	unsigned int count;
};

struct vnic_dev {
	void *priv;
	struct pci_dev *pdev;
	struct vnic_res res[RES_TYPE_MAX];
	enum vnic_dev_intr_mode intr_mode;
	struct vnic_devcmd __iomem *devcmd;
	struct vnic_devcmd_notify *notify;
	struct vnic_devcmd_notify notify_copy;
	dma_addr_t notify_pa;
	struct vnic_stats *stats;
	dma_addr_t stats_pa;
	struct vnic_devcmd_fw_info *fw_info;
	dma_addr_t fw_info_pa;
	u64 args[VNIC_DEVCMD_NARGS];
	struct devcmd2_controller *devcmd2;

	int (*devcmd_rtn)(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
			  int wait);
};

#define VNIC_MAX_RES_HDR_SIZE \
	(sizeof(struct vnic_resource_header) + \
	sizeof(struct vnic_resource) * RES_TYPE_MAX)
#define VNIC_RES_STRIDE	128

void *svnic_dev_priv(struct vnic_dev *vdev)
{
	return vdev->priv;
}

static int vnic_dev_discover_res(struct vnic_dev *vdev,
	struct vnic_dev_bar *bar, unsigned int num_bars)
{
	struct vnic_resource_header __iomem *rh;
	struct vnic_resource __iomem *r;
	u8 type;

	if (num_bars == 0)
		return -EINVAL;

	if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
		pr_err("vNIC BAR0 res hdr length error\n");

		return -EINVAL;
	}

	rh = bar->vaddr;
	if (!rh) {
		pr_err("vNIC BAR0 res hdr not mem-mapped\n");

		return -EINVAL;
	}

	if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
	    ioread32(&rh->version) != VNIC_RES_VERSION) {
		pr_err("vNIC BAR0 res magic/version error exp (%lx/%lx) curr (%x/%x)\n",
			VNIC_RES_MAGIC, VNIC_RES_VERSION,
			ioread32(&rh->magic), ioread32(&rh->version));

		return -EINVAL;
	}

	r = (struct vnic_resource __iomem *)(rh + 1);

	while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {

		u8 bar_num = ioread8(&r->bar);
		u32 bar_offset = ioread32(&r->bar_offset);
		u32 count = ioread32(&r->count);
		u32 len;

		r++;

		if (bar_num >= num_bars)

Annotation

Implementation Notes