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Subject[patch v2 net-next 12/13] net: hns: implement the miscellaneous operation by asl
Date
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>
---
change log:
v2: use a serial function to implement the reset sequence

v1: first submit
link: https://lkml.org/lkml/2016/5/13/94
---
drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c | 167 +++++++++++++++++++++
1 file changed, 167 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
index f21177b..96cb628 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
@@ -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)
@@ -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;
@@ -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)
{
@@ -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)
{
@@ -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)
{
@@ -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)
{
@@ -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)
@@ -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)
@@ -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;
@@ -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;
--
1.9.1
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