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net: hns: implement the miscellaneous operation by asl
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The miscellaneous operation is implemented in BIOS, the kernel can call
_DSM method help to call the implementation in ACPI case. Here is a patch
to do that.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Kejian Yan authored and David S. Miller committed Jun 5, 2016
1 parent 1d1afa2 commit f00ef86
Showing 1 changed file with 167 additions and 0 deletions.
167 changes: 167 additions & 0 deletions drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,27 @@
#include "hns_dsaf_ppe.h"
#include "hns_dsaf_reg.h"

enum _dsm_op_index {
HNS_OP_RESET_FUNC = 0x1,
HNS_OP_SERDES_LP_FUNC = 0x2,
HNS_OP_LED_SET_FUNC = 0x3,
HNS_OP_GET_PORT_TYPE_FUNC = 0x4,
HNS_OP_GET_SFP_STAT_FUNC = 0x5,
};

enum _dsm_rst_type {
HNS_DSAF_RESET_FUNC = 0x1,
HNS_PPE_RESET_FUNC = 0x2,
HNS_XGE_CORE_RESET_FUNC = 0x3,
HNS_XGE_RESET_FUNC = 0x4,
HNS_GE_RESET_FUNC = 0x5,
};

const u8 hns_dsaf_acpi_dsm_uuid[] = {
0x1A, 0xAA, 0x85, 0x1A, 0x93, 0xE2, 0x5E, 0x41,
0x8E, 0x28, 0x8D, 0x69, 0x0A, 0x0F, 0x82, 0x0A
};

static void dsaf_write_sub(struct dsaf_device *dsaf_dev, u32 reg, u32 val)
{
if (dsaf_dev->sub_ctrl)
Expand Down Expand Up @@ -109,6 +130,34 @@ static int cpld_set_led_id(struct hns_mac_cb *mac_cb,

#define RESET_REQ_OR_DREQ 1

static void hns_dsaf_acpi_srst_by_port(struct dsaf_device *dsaf_dev, u8 op_type,
u32 port_type, u32 port, u32 val)
{
union acpi_object *obj;
union acpi_object obj_args[3], argv4;

obj_args[0].integer.type = ACPI_TYPE_INTEGER;
obj_args[0].integer.value = port_type;
obj_args[1].integer.type = ACPI_TYPE_INTEGER;
obj_args[1].integer.value = port;
obj_args[2].integer.type = ACPI_TYPE_INTEGER;
obj_args[2].integer.value = val;

argv4.type = ACPI_TYPE_PACKAGE;
argv4.package.count = 3;
argv4.package.elements = obj_args;

obj = acpi_evaluate_dsm(ACPI_HANDLE(dsaf_dev->dev),
hns_dsaf_acpi_dsm_uuid, 0, op_type, &argv4);
if (!obj) {
dev_warn(dsaf_dev->dev, "reset port_type%d port%d fail!",
port_type, port);
return;
}

ACPI_FREE(obj);
}

static void hns_dsaf_rst(struct dsaf_device *dsaf_dev, bool dereset)
{
u32 xbar_reg_addr;
Expand All @@ -126,6 +175,13 @@ static void hns_dsaf_rst(struct dsaf_device *dsaf_dev, bool dereset)
dsaf_write_sub(dsaf_dev, nt_reg_addr, RESET_REQ_OR_DREQ);
}

static void hns_dsaf_rst_acpi(struct dsaf_device *dsaf_dev, bool dereset)
{
hns_dsaf_acpi_srst_by_port(dsaf_dev, HNS_OP_RESET_FUNC,
HNS_DSAF_RESET_FUNC,
0, dereset);
}

static void hns_dsaf_xge_srst_by_port(struct dsaf_device *dsaf_dev, u32 port,
bool dereset)
{
Expand All @@ -146,6 +202,13 @@ static void hns_dsaf_xge_srst_by_port(struct dsaf_device *dsaf_dev, u32 port,
dsaf_write_sub(dsaf_dev, reg_addr, reg_val);
}

static void hns_dsaf_xge_srst_by_port_acpi(struct dsaf_device *dsaf_dev,
u32 port, bool dereset)
{
hns_dsaf_acpi_srst_by_port(dsaf_dev, HNS_OP_RESET_FUNC,
HNS_XGE_RESET_FUNC, port, dereset);
}

static void hns_dsaf_xge_core_srst_by_port(struct dsaf_device *dsaf_dev,
u32 port, bool dereset)
{
Expand All @@ -166,6 +229,14 @@ static void hns_dsaf_xge_core_srst_by_port(struct dsaf_device *dsaf_dev,
dsaf_write_sub(dsaf_dev, reg_addr, reg_val);
}

static void
hns_dsaf_xge_core_srst_by_port_acpi(struct dsaf_device *dsaf_dev,
u32 port, bool dereset)
{
hns_dsaf_acpi_srst_by_port(dsaf_dev, HNS_OP_RESET_FUNC,
HNS_XGE_CORE_RESET_FUNC, port, dereset);
}

static void hns_dsaf_ge_srst_by_port(struct dsaf_device *dsaf_dev, u32 port,
bool dereset)
{
Expand Down Expand Up @@ -218,6 +289,13 @@ static void hns_dsaf_ge_srst_by_port(struct dsaf_device *dsaf_dev, u32 port,
}
}

static void hns_dsaf_ge_srst_by_port_acpi(struct dsaf_device *dsaf_dev,
u32 port, bool dereset)
{
hns_dsaf_acpi_srst_by_port(dsaf_dev, HNS_OP_RESET_FUNC,
HNS_GE_RESET_FUNC, port, dereset);
}

static void hns_ppe_srst_by_port(struct dsaf_device *dsaf_dev, u32 port,
bool dereset)
{
Expand All @@ -234,11 +312,21 @@ static void hns_ppe_srst_by_port(struct dsaf_device *dsaf_dev, u32 port,
dsaf_write_sub(dsaf_dev, reg_addr, reg_val);
}

static void
hns_ppe_srst_by_port_acpi(struct dsaf_device *dsaf_dev, u32 port, bool dereset)
{
hns_dsaf_acpi_srst_by_port(dsaf_dev, HNS_OP_RESET_FUNC,
HNS_PPE_RESET_FUNC, port, dereset);
}

static void hns_ppe_com_srst(struct dsaf_device *dsaf_dev, bool dereset)
{
u32 reg_val;
u32 reg_addr;

if (!(dev_of_node(dsaf_dev->dev)))
return;

if (!HNS_DSAF_IS_DEBUG(dsaf_dev)) {
reg_val = RESET_REQ_OR_DREQ;
if (!dereset)
Expand Down Expand Up @@ -295,6 +383,36 @@ static phy_interface_t hns_mac_get_phy_if(struct hns_mac_cb *mac_cb)
return phy_if;
}

static phy_interface_t hns_mac_get_phy_if_acpi(struct hns_mac_cb *mac_cb)
{
phy_interface_t phy_if = PHY_INTERFACE_MODE_NA;
union acpi_object *obj;
union acpi_object obj_args, argv4;

obj_args.integer.type = ACPI_TYPE_INTEGER;
obj_args.integer.value = mac_cb->mac_id;

argv4.type = ACPI_TYPE_PACKAGE,
argv4.package.count = 1,
argv4.package.elements = &obj_args,

obj = acpi_evaluate_dsm(ACPI_HANDLE(mac_cb->dev),
hns_dsaf_acpi_dsm_uuid, 0,
HNS_OP_GET_PORT_TYPE_FUNC, &argv4);

if (!obj || obj->type != ACPI_TYPE_INTEGER)
return phy_if;

phy_if = obj->integer.value ?
PHY_INTERFACE_MODE_XGMII : PHY_INTERFACE_MODE_SGMII;

dev_dbg(mac_cb->dev, "mac_id=%d, phy_if=%d\n", mac_cb->mac_id, phy_if);

ACPI_FREE(obj);

return phy_if;
}

int hns_mac_get_sfp_prsnt(struct hns_mac_cb *mac_cb, int *sfp_prsnt)
{
if (!mac_cb->cpld_ctrl)
Expand Down Expand Up @@ -354,6 +472,36 @@ static int hns_mac_config_sds_loopback(struct hns_mac_cb *mac_cb, bool en)
return 0;
}

static int
hns_mac_config_sds_loopback_acpi(struct hns_mac_cb *mac_cb, bool en)
{
union acpi_object *obj;
union acpi_object obj_args[3], argv4;

obj_args[0].integer.type = ACPI_TYPE_INTEGER;
obj_args[0].integer.value = mac_cb->mac_id;
obj_args[1].integer.type = ACPI_TYPE_INTEGER;
obj_args[1].integer.value = !!en;

argv4.type = ACPI_TYPE_PACKAGE;
argv4.package.count = 2;
argv4.package.elements = obj_args;

obj = acpi_evaluate_dsm(ACPI_HANDLE(mac_cb->dsaf_dev->dev),
hns_dsaf_acpi_dsm_uuid, 0,
HNS_OP_SERDES_LP_FUNC, &argv4);
if (!obj) {
dev_warn(mac_cb->dsaf_dev->dev, "set port%d serdes lp fail!",
mac_cb->mac_id);

return -ENOTSUPP;
}

ACPI_FREE(obj);

return 0;
}

struct dsaf_misc_op *hns_misc_op_get(struct dsaf_device *dsaf_dev)
{
struct dsaf_misc_op *misc_op;
Expand All @@ -378,6 +526,25 @@ struct dsaf_misc_op *hns_misc_op_get(struct dsaf_device *dsaf_dev)
misc_op->get_sfp_prsnt = hns_mac_get_sfp_prsnt;

misc_op->cfg_serdes_loopback = hns_mac_config_sds_loopback;
} else if (is_acpi_node(dsaf_dev->dev->fwnode)) {
misc_op->cpld_set_led = hns_cpld_set_led;
misc_op->cpld_reset_led = cpld_led_reset;
misc_op->cpld_set_led_id = cpld_set_led_id;

misc_op->dsaf_reset = hns_dsaf_rst_acpi;
misc_op->xge_srst = hns_dsaf_xge_srst_by_port_acpi;
misc_op->xge_core_srst = hns_dsaf_xge_core_srst_by_port_acpi;
misc_op->ge_srst = hns_dsaf_ge_srst_by_port_acpi;
misc_op->ppe_srst = hns_ppe_srst_by_port_acpi;
misc_op->ppe_comm_srst = hns_ppe_com_srst;

misc_op->get_phy_if = hns_mac_get_phy_if_acpi;
misc_op->get_sfp_prsnt = hns_mac_get_sfp_prsnt;

misc_op->cfg_serdes_loopback = hns_mac_config_sds_loopback_acpi;
} else {
devm_kfree(dsaf_dev->dev, (void *)misc_op);
misc_op = NULL;
}

return (void *)misc_op;
Expand Down

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