Commit 6060aa7b authored by Weibo Zhao's avatar Weibo Zhao Committed by JiangShui
Browse files

hns3 udma: mmap doorbell address to uar page 

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


CVE: NA

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

This patch mmap doorbell address of hardware to
uar page. Doorbell address is in bar23 area.

Signed-off-by: default avatarWeibo Zhao <zhaoweibo3@huawei.com>
parent e63f303b

drivers/ub/hw/hns3/hns3_udma_abi.h

+7 −0
Original line number Diff line number Diff line
@@ -17,6 +17,13 @@ 
#define _UDMA_ABI_H



#include <linux/types.h>



#define MAP_COMMAND_MASK		0xff



enum {

	UDMA_MMAP_UAR_PAGE,

};



struct udma_create_ctx_resp {

	uint32_t num_comp_vectors;

	uint32_t num_qps_shift;

drivers/ub/hw/hns3/hns3_udma_main.c

+35 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
 *

 */



#include <linux/iommu.h>

#include <linux/pci.h>

#include "urma/ubcore_api.h"

#include "hns3_udma_abi.h"
@@ -126,11 +127,45 @@ static int udma_free_ucontext(struct ubcore_ucontext *uctx) 
	return 0;

}



static int get_mmap_cmd(struct vm_area_struct *vma)

{

	return (vma->vm_pgoff & MAP_COMMAND_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);

	int cmd;



	if (((vma->vm_end - vma->vm_start) % PAGE_SIZE) != 0) {

		dev_err(udma_dev->dev,

			"mmap failed, unexpected vm area size.\n");

		return -EINVAL;

	}



	cmd = get_mmap_cmd(vma);

	switch (cmd) {

	case UDMA_MMAP_UAR_PAGE:

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

		if (io_remap_pfn_range(vma, vma->vm_start,

				       to_udma_ucontext(uctx)->uar.pfn,

				       PAGE_SIZE, vma->vm_page_prot))

			return -EAGAIN;

		break;

	default:

		dev_err(udma_dev->dev,

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

		return -EINVAL;

	}



	return 0;

}

static struct ubcore_ops g_udma_dev_ops = {

	.owner = THIS_MODULE,

	.abi_version = 1,

	.alloc_ucontext = udma_alloc_ucontext,

	.free_ucontext = udma_free_ucontext,

	.mmap = udma_mmap,

};



static void udma_cleanup_uar_table(struct udma_dev *dev)