drivers/net/wireless/realtek/rtw88/sec.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/realtek/rtw88/sec.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/realtek/rtw88/sec.c
Extension
.c
Size
3614 bytes
Lines
146
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

switch (i) {
		case 0:
			content = ((key->keyidx & 0x3))		|
				  ((hw_key_type & 0x7)	<< 2)	|
				  (cam->group		<< 6)	|
				  (cam->valid		<< 15)	|
				  (cam->addr[0]		<< 16)	|
				  (cam->addr[1]		<< 24);
			break;
		case 1:
			content = (cam->addr[2])		|
				  (cam->addr[3]		<< 8)	|
				  (cam->addr[4]		<< 16)	|
				  (cam->addr[5]		<< 24);
			break;
		case 6:
		case 7:
			content = 0;
			break;
		default:
			j = (i - 2) << 2;
			content = (key->key[j])			|
				  (key->key[j + 1]	<< 8)	|
				  (key->key[j + 2]	<< 16)	|
				  (key->key[j + 3]	<< 24);
			break;
		}

		command = write_cmd | (addr + i);
		rtw_write32(rtwdev, RTW_SEC_WRITE_REG, content);
		rtw_write32(rtwdev, RTW_SEC_CMD_REG, command);
	}
}

void rtw_sec_clear_cam(struct rtw_dev *rtwdev,
		       struct rtw_sec_desc *sec,
		       u8 hw_key_idx)
{
	struct rtw_cam_entry *cam = &sec->cam_table[hw_key_idx];
	u32 write_cmd;
	u32 command;
	u32 addr;

	clear_bit(hw_key_idx, sec->cam_map);
	cam->valid = false;
	cam->key = NULL;
	eth_zero_addr(cam->addr);

	write_cmd = RTW_SEC_CMD_WRITE_ENABLE | RTW_SEC_CMD_POLLING;
	addr = hw_key_idx << RTW_SEC_CAM_ENTRY_SHIFT;
	command = write_cmd | addr;
	rtw_write32(rtwdev, RTW_SEC_WRITE_REG, 0);
	rtw_write32(rtwdev, RTW_SEC_CMD_REG, command);
}

u8 rtw_sec_cam_pg_backup(struct rtw_dev *rtwdev, u8 *used_cam)
{
	struct rtw_sec_desc *sec = &rtwdev->sec;
	u8 offset = 0;
	u8 count, n;

	if (!used_cam)
		return 0;

	for (count = 0; count < MAX_PG_CAM_BACKUP_NUM; count++) {
		n = find_next_bit(sec->cam_map, RTW_MAX_SEC_CAM_NUM, offset);
		if (n == RTW_MAX_SEC_CAM_NUM)
			break;

		used_cam[count] = n;
		offset = n + 1;
	}

	return count;
}

void rtw_sec_enable_sec_engine(struct rtw_dev *rtwdev)
{
	struct rtw_sec_desc *sec = &rtwdev->sec;
	u16 ctrl_reg;
	u16 sec_config;

	/* default use default key search for now */
	sec->default_key_search = true;

	ctrl_reg = rtw_read16(rtwdev, REG_CR);
	ctrl_reg |= RTW_SEC_ENGINE_EN;
	rtw_write16(rtwdev, REG_CR, ctrl_reg);

	sec_config = rtw_read16(rtwdev, RTW_SEC_CONFIG);

Annotation

Implementation Notes