Commit 5f85590f authored by Weibo Zhao's avatar Weibo Zhao Committed by JiangShui
Browse files

hns3 udma: add support of mmap direct wqe page 

driver inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I85R2F


CVE: NA

----------------------------------------------

Direct wqe address start at bar45 and each qp
mmap 65536B of memory.

Signed-off-by: default avatarWeibo Zhao <zhaoweibo3@huawei.com>
parent 3ef7a94b

drivers/ub/hw/hns3/hns3_udma_abi.h

+4 −0
Original line number Diff line number Diff line
@@ -19,6 +19,9 @@ 
#include <linux/types.h>



#define MAP_COMMAND_MASK		0xff

#define MAP_INDEX_MASK			0xffffff

#define MAP_INDEX_SHIFT			8

#define UDMA_DWQE_PAGE_SIZE		65536

#define UDMA_JETTY_X_PREFIX_BIT_NUM	2

#define UDMA_JFR_QPN_PREFIX		0x1

#define UDMA_ADDR_4K_MASK		0xfffUL
@@ -26,6 +29,7 @@ 


enum {

	UDMA_MMAP_UAR_PAGE,

	UDMA_MMAP_DWQE_PAGE,

};



enum udma_jfc_init_attr_mask {

drivers/ub/hw/hns3/hns3_udma_main.c

+16 −0
Original line number Diff line number Diff line
@@ -145,9 +145,16 @@ static int get_mmap_cmd(struct vm_area_struct *vma) 
	return (vma->vm_pgoff & MAP_COMMAND_MASK);

}



static uint64_t get_mmap_idx(struct vm_area_struct *vma)

{

	return ((vma->vm_pgoff >> MAP_INDEX_SHIFT) & MAP_INDEX_MASK);

}



static int udma_mmap(struct ubcore_ucontext *uctx, struct vm_area_struct *vma)

{

	struct udma_dev *udma_dev = to_udma_dev(uctx->ub_dev);

	uint64_t address;

	uint64_t qpn;

	int cmd;



	if (((vma->vm_end - vma->vm_start) % PAGE_SIZE) != 0) {
@@ -165,6 +172,15 @@ static int udma_mmap(struct ubcore_ucontext *uctx, struct vm_area_struct *vma) 
				       PAGE_SIZE, vma->vm_page_prot))

			return -EAGAIN;

		break;

	case UDMA_MMAP_DWQE_PAGE:

		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);

		qpn = get_mmap_idx(vma);

		address = udma_dev->dwqe_page + qpn * UDMA_DWQE_PAGE_SIZE;

		if (io_remap_pfn_range(vma, vma->vm_start,

				       address >> PAGE_SHIFT,

				       UDMA_DWQE_PAGE_SIZE, vma->vm_page_prot))

			return -EAGAIN;

		break;

	default:

		dev_err(udma_dev->dev,

			"mmap failed, cmd(%d) not support\n", cmd);