drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/huawei/hinic/hinic_hw_mbox.c
Extension
.c
Size
42935 bytes
Lines
1516
Domain
Driver Families
Bucket
drivers/net
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

if (vf_in_pf < 1 || vf_in_pf > hwdev->nic_cap.max_vf) {
			dev_warn(&hwdev->hwif->pdev->dev,
				 "Receive vf id(0x%x) is invalid, vf id should be from 0x%x to 0x%x\n",
				 src, offset + 1,
				 hwdev->nic_cap.max_vf + offset);
			return false;
		}
	}

	random_id = be32_to_cpu(*(u32 *)(header + MBOX_SEG_LEN +
					 MBOX_HEADER_SZ));

	if (random_id == func_to_func->vf_mbx_rand_id[src] ||
	    random_id == func_to_func->vf_mbx_old_rand_id[src])
		return true;

	dev_warn(&hwdev->hwif->pdev->dev,
		 "The mailbox random id(0x%x) of func_id(0x%x) doesn't match with pf reservation(0x%x)\n",
		 random_id, src, func_to_func->vf_mbx_rand_id[src]);

	mbox_work = kzalloc_obj(*mbox_work);
	if (!mbox_work)
		return false;

	mbox_work->func_to_func = func_to_func;
	mbox_work->src_func_idx = src;

	INIT_WORK(&mbox_work->work, update_random_id_work_handler);
	queue_work(func_to_func->workq, &mbox_work->work);

	return false;
}

static void hinic_mbox_func_aeqe_handler(void *handle, void *header, u8 size)
{
	struct hinic_mbox_func_to_func *func_to_func;
	u64 mbox_header = *((u64 *)header);
	struct hinic_recv_mbox *recv_mbox;
	u64 src, dir;

	func_to_func = ((struct hinic_hwdev *)handle)->func_to_func;

	dir = HINIC_MBOX_HEADER_GET(mbox_header, DIRECTION);
	src = HINIC_MBOX_HEADER_GET(mbox_header, SRC_GLB_FUNC_IDX);

	if (src >= HINIC_MAX_FUNCTIONS) {
		dev_err(&func_to_func->hwif->pdev->dev,
			"Mailbox source function id:%u is invalid\n", (u32)src);
		return;
	}

	if (!check_vf_mbox_random_id(func_to_func, header))
		return;

	recv_mbox = (dir == HINIC_HWIF_DIRECT_SEND) ?
		    &func_to_func->mbox_send[src] :
		    &func_to_func->mbox_resp[src];

	recv_mbox_handler(func_to_func, (u64 *)header, recv_mbox);
}

static void hinic_mbox_self_aeqe_handler(void *handle, void *header, u8 size)
{
	struct hinic_mbox_func_to_func *func_to_func;
	struct hinic_send_mbox *send_mbox;

	func_to_func = ((struct hinic_hwdev *)handle)->func_to_func;
	send_mbox = &func_to_func->send_mbox;

	complete(&send_mbox->send_done);
}

static void clear_mbox_status(struct hinic_send_mbox *mbox)
{
	*mbox->wb_status = 0;

	/* clear mailbox write back status */
	wmb();
}

static void mbox_copy_header(struct hinic_hwdev *hwdev,
			     struct hinic_send_mbox *mbox, u64 *header)
{
	u32 i, idx_max = MBOX_HEADER_SZ / sizeof(u32);
	u32 *data = (u32 *)header;

	for (i = 0; i < idx_max; i++)
		__raw_writel(*(data + i), mbox->data + i * sizeof(u32));
}

Annotation

Implementation Notes