Commit e1d0edff authored by Weibo Zhao's avatar Weibo Zhao Committed by JiangShui
Browse files

hns3 udma: feature of memory translate region 

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


CVE: NA

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

This patch is the code of Memory-Translate-Region(MTR).
MTR is a way that hardware can read/write memory.

Signed-off-by: default avatarWeibo Zhao <zhaoweibo3@huawei.com>
parent b330adf6

drivers/ub/hw/hns3/hns3_udma_device.h

+52 −0
Original line number Diff line number Diff line
@@ -55,6 +55,9 @@ 
#define UDMA_TX_CMQ_PI_REG			0x07010

#define UDMA_TX_CMQ_CI_REG			0x07014



#define UDMA_MAX_BT_REGION			3

#define UDMA_MAX_BT_LEVEL			3



enum udma_reset_stage {

	UDMA_STATE_RST_DOWN = 2,

	UDMA_STATE_RST_UNINIT,
@@ -104,11 +107,47 @@ struct udma_ida { 
	uint32_t	min; /* Lowest ID to allocate.  */

	uint32_t	max; /* Highest ID to allocate. */

};



struct udma_buf_region {

	uint32_t	offset; /* page offset */

	uint32_t	count; /* page count */

	int		hopnum; /* addressing hop num */

};



struct udma_hem_list {

	struct list_head	root_bt;

	/* link all bt dma mem by hop config */

	struct list_head	mid_bt[UDMA_MAX_BT_REGION][UDMA_MAX_BT_LEVEL];

	struct list_head	btm_bt; /* link all bottom bt in @mid_bt */

	dma_addr_t		root_ba; /* pointer to the root ba table */

};



struct udma_buf_attr {

	struct {

		size_t		size;  /* region size */

		int		hopnum; /* multi-hop addressing hop num */

	} region[UDMA_MAX_BT_REGION];

	uint32_t		region_count; /* valid region count */

	uint32_t		page_shift;  /* buffer page shift */

	/* only alloc buffer-required MTT memory */

	bool			mtt_only;

};



struct udma_buf_list {

	void		*buf;

	dma_addr_t	map;

};



struct udma_hem_cfg {

	dma_addr_t		root_ba; /* root BA table's address */

	bool			is_direct; /* addressing without BA table */

	uint32_t		ba_pg_shift; /* BA table page shift */

	uint32_t		buf_pg_shift; /* buffer page shift */

	uint32_t		buf_pg_count;  /* buffer page count */

	struct udma_buf_region	region[UDMA_MAX_BT_REGION];

	uint32_t		region_count;

};



struct udma_buf {

	struct udma_buf_list		*trunk_list;

	uint32_t			ntrunks;
@@ -121,6 +160,15 @@ struct udma_link_table { 
	struct udma_buf_list	table;

	struct udma_buf		*buf;

};



/* memory translate region */

struct udma_mtr {

	struct udma_hem_list	hem_list; /* multi-hop addressing resource */

	struct ubcore_umem	*umem; /* user space buffer */

	struct udma_buf		*kmem; /* kernel space buffer */

	struct udma_hem_cfg	hem_cfg; /* config for hardware addressing */

};



struct udma_dev;

struct udma_cmd_context {

	struct completion	done;
@@ -498,6 +546,10 @@ int udma_cmq_send(struct udma_dev *udma_dev, 
		  struct udma_cmq_desc *desc, int num);

int udma_hnae_client_init(struct udma_dev *udma_dev);

void udma_hnae_client_exit(struct udma_dev *udma_dev);

int udma_mtr_create(struct udma_dev *udma_dev, struct udma_mtr *mtr,

		    struct udma_buf_attr *buf_attr, uint32_t ba_page_shift,

		    uint64_t user_addr, bool is_user);

void udma_mtr_destroy(struct udma_dev *udma_dev, struct udma_mtr *mtr);

void udma_cleanup_common_hem(struct udma_dev *udma_dev);

int udma_init_common_hem(struct udma_dev *udma_dev);

drivers/ub/hw/hns3/hns3_udma_hem.c

+1108 −0

File changed.

Preview size limit exceeded, changes collapsed.

drivers/ub/hw/hns3/hns3_udma_hem.h

+17 −0
Original line number Diff line number Diff line
@@ -100,6 +100,23 @@ struct udma_hem_mhop { 
	uint32_t l2_idx; /* level 2 base address table index */

};



struct udma_hem_item {

	struct list_head	list; /* link all hems in the same bt level */

	struct list_head	sibling; /* link all hems in last hop for mtt */

	void			*addr;

	dma_addr_t		dma_addr;

	size_t			count; /* max ba numbers */

	int			start; /* start buf offset in this hem */

	int			end; /* end buf offset in this hem */

};



/* All HEM itmes are linked in a tree structure */

struct udma_hem_head {

	struct list_head branch[UDMA_MAX_BT_REGION];

	struct list_head root;

	struct list_head leaf;

};



struct udma_buf *udma_buf_alloc(struct udma_dev *udma_dev, uint32_t size,

				uint32_t page_shift, uint32_t flags);

void udma_buf_free(struct udma_dev *udma_dev, struct udma_buf *buf);