platform/x86: mlx-platform: Add ASIC hotplug device configuration

Add support for ASIC hotplug device events for the all system types. The
ASIC hotplug event is sent in cases ASIC reaches the good health state or
dropped to the bad health state. The health state is used to change, when
device is reset or in case of some system failures. In such cases hwmon
uevent notification will be sent.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
index deea6a6339af009a65770c06392e6ce6d306fce8..a9ad1bc9157563e143cdc482ade8032c037699d8 100644 (file)
--- a/drivers/platform/x86/mlx-platform.c
+++ b/drivers/platform/x86/mlx-platform.c
@@ -65,6 +65,8 @@
 #define MLXPLAT_CPLD_LPC_REG_AGGRLO_OFFSET     0x40
 #define MLXPLAT_CPLD_LPC_REG_AGGRLO_MASK_OFFSET        0x41
 #define MLXPLAT_CPLD_LPC_REG_ASIC_HEALTH_OFFSET 0x50
+#define MLXPLAT_CPLD_LPC_REG_ASIC_EVENT_OFFSET 0x51
+#define MLXPLAT_CPLD_LPC_REG_ASIC_MASK_OFFSET  0x52
 #define MLXPLAT_CPLD_LPC_REG_PSU_OFFSET                0x58
 #define MLXPLAT_CPLD_LPC_REG_PSU_EVENT_OFFSET  0x59
 #define MLXPLAT_CPLD_LPC_REG_PSU_MASK_OFFSET   0x5a
@@ -100,17 +102,21 @@
                                  MLXPLAT_CPLD_LPC_PIO_OFFSET)
 
 /* Masks for aggregation, psu, pwr and fan event in CPLD related registers. */
+#define MLXPLAT_CPLD_AGGR_ASIC_MASK_DEF        0x04
 #define MLXPLAT_CPLD_AGGR_PSU_MASK_DEF 0x08
 #define MLXPLAT_CPLD_AGGR_PWR_MASK_DEF 0x08
 #define MLXPLAT_CPLD_AGGR_FAN_MASK_DEF 0x40
-#define MLXPLAT_CPLD_AGGR_MASK_DEF     (MLXPLAT_CPLD_AGGR_PSU_MASK_DEF | \
+#define MLXPLAT_CPLD_AGGR_MASK_DEF     (MLXPLAT_CPLD_AGGR_ASIC_MASK_DEF | \
+                                        MLXPLAT_CPLD_AGGR_PSU_MASK_DEF | \
                                         MLXPLAT_CPLD_AGGR_FAN_MASK_DEF)
+#define MLXPLAT_CPLD_AGGR_ASIC_MASK_NG 0x01
 #define MLXPLAT_CPLD_AGGR_MASK_NG_DEF  0x04
-#define MLXPLAT_CPLD_LOW_AGGR_MASK_LOW 0xc0
+#define MLXPLAT_CPLD_LOW_AGGR_MASK_LOW 0xc1
 #define MLXPLAT_CPLD_AGGR_MASK_MSN21XX 0x04
 #define MLXPLAT_CPLD_PSU_MASK          GENMASK(1, 0)
 #define MLXPLAT_CPLD_PWR_MASK          GENMASK(1, 0)
 #define MLXPLAT_CPLD_FAN_MASK          GENMASK(3, 0)
+#define MLXPLAT_CPLD_ASIC_MASK         GENMASK(1, 0)
 #define MLXPLAT_CPLD_FAN_NG_MASK       GENMASK(5, 0)
 #define MLXPLAT_CPLD_LED_LO_NIBBLE_MASK        GENMASK(7, 4)
 #define MLXPLAT_CPLD_LED_HI_NIBBLE_MASK        GENMASK(3, 0)
@@ -315,6 +321,15 @@ static struct mlxreg_core_data mlxplat_mlxcpld_default_fan_items_data[] = {
        },
 };
 
+static struct mlxreg_core_data mlxplat_mlxcpld_default_asic_items_data[] = {
+       {
+               .label = "asic1",
+               .reg = MLXPLAT_CPLD_LPC_REG_ASIC_HEALTH_OFFSET,
+               .mask = MLXPLAT_CPLD_ASIC_MASK,
+               .hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+       },
+};
+
 static struct mlxreg_core_item mlxplat_mlxcpld_default_items[] = {
        {
                .data = mlxplat_mlxcpld_default_psu_items_data,
@@ -343,6 +358,15 @@ static struct mlxreg_core_item mlxplat_mlxcpld_default_items[] = {
                .inversed = 1,
                .health = false,
        },
+       {
+               .data = mlxplat_mlxcpld_default_asic_items_data,
+               .aggr_mask = MLXPLAT_CPLD_AGGR_ASIC_MASK_DEF,
+               .reg = MLXPLAT_CPLD_LPC_REG_ASIC_HEALTH_OFFSET,
+               .mask = MLXPLAT_CPLD_ASIC_MASK,
+               .count = ARRAY_SIZE(mlxplat_mlxcpld_default_asic_items_data),
+               .inversed = 0,
+               .health = true,
+       },
 };
 
 static
@@ -351,6 +375,8 @@ struct mlxreg_core_hotplug_platform_data mlxplat_mlxcpld_default_data = {
        .counter = ARRAY_SIZE(mlxplat_mlxcpld_default_items),
        .cell = MLXPLAT_CPLD_LPC_REG_AGGR_OFFSET,
        .mask = MLXPLAT_CPLD_AGGR_MASK_DEF,
+       .cell_low = MLXPLAT_CPLD_LPC_REG_AGGRLO_OFFSET,
+       .mask_low = MLXPLAT_CPLD_LOW_AGGR_MASK_LOW,
 };
 
 static struct mlxreg_core_data mlxplat_mlxcpld_msn21xx_pwr_items_data[] = {
@@ -379,6 +405,15 @@ static struct mlxreg_core_item mlxplat_mlxcpld_msn21xx_items[] = {
                .inversed = 0,
                .health = false,
        },
+       {
+               .data = mlxplat_mlxcpld_default_asic_items_data,
+               .aggr_mask = MLXPLAT_CPLD_AGGR_ASIC_MASK_DEF,
+               .reg = MLXPLAT_CPLD_LPC_REG_ASIC_HEALTH_OFFSET,
+               .mask = MLXPLAT_CPLD_ASIC_MASK,
+               .count = ARRAY_SIZE(mlxplat_mlxcpld_default_asic_items_data),
+               .inversed = 0,
+               .health = true,
+       },
 };
 
 static
@@ -481,6 +516,15 @@ static struct mlxreg_core_item mlxplat_mlxcpld_msn274x_items[] = {
                .inversed = 1,
                .health = false,
        },
+       {
+               .data = mlxplat_mlxcpld_default_asic_items_data,
+               .aggr_mask = MLXPLAT_CPLD_AGGR_MASK_NG_DEF,
+               .reg = MLXPLAT_CPLD_LPC_REG_ASIC_HEALTH_OFFSET,
+               .mask = MLXPLAT_CPLD_ASIC_MASK,
+               .count = ARRAY_SIZE(mlxplat_mlxcpld_default_asic_items_data),
+               .inversed = 0,
+               .health = true,
+       },
 };
 
 static
@@ -519,6 +563,15 @@ static struct mlxreg_core_item mlxplat_mlxcpld_msn201x_items[] = {
                .inversed = 0,
                .health = false,
        },
+       {
+               .data = mlxplat_mlxcpld_default_asic_items_data,
+               .aggr_mask = MLXPLAT_CPLD_AGGR_ASIC_MASK_DEF,
+               .reg = MLXPLAT_CPLD_LPC_REG_ASIC_HEALTH_OFFSET,
+               .mask = MLXPLAT_CPLD_ASIC_MASK,
+               .count = ARRAY_SIZE(mlxplat_mlxcpld_default_asic_items_data),
+               .inversed = 0,
+               .health = true,
+       },
 };
 
 static
@@ -616,6 +669,15 @@ static struct mlxreg_core_item mlxplat_mlxcpld_default_ng_items[] = {
                .inversed = 1,
                .health = false,
        },
+       {
+               .data = mlxplat_mlxcpld_default_asic_items_data,
+               .aggr_mask = MLXPLAT_CPLD_AGGR_MASK_NG_DEF,
+               .reg = MLXPLAT_CPLD_LPC_REG_ASIC_HEALTH_OFFSET,
+               .mask = MLXPLAT_CPLD_ASIC_MASK,
+               .count = ARRAY_SIZE(mlxplat_mlxcpld_default_asic_items_data),
+               .inversed = 0,
+               .health = true,
+       },
 };
 
 static
@@ -935,7 +997,7 @@ static struct mlxreg_core_data mlxplat_mlxcpld_default_regs_io_data[] = {
        {
                .label = "asic_health",
                .reg = MLXPLAT_CPLD_LPC_REG_ASIC_HEALTH_OFFSET,
-               .mask = GENMASK(1, 0),
+               .mask = MLXPLAT_CPLD_ASIC_MASK,
                .bit = 1,
                .mode = 0444,
        },
@@ -1033,6 +1095,8 @@ static bool mlxplat_mlxcpld_writeable_reg(struct device *dev, unsigned int reg)
        case MLXPLAT_CPLD_LPC_REG_WP2_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_AGGR_MASK_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_AGGRLO_MASK_OFFSET:
+       case MLXPLAT_CPLD_LPC_REG_ASIC_EVENT_OFFSET:
+       case MLXPLAT_CPLD_LPC_REG_ASIC_MASK_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_PSU_EVENT_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_PSU_MASK_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_PWR_EVENT_OFFSET:
@@ -1066,6 +1130,8 @@ static bool mlxplat_mlxcpld_readable_reg(struct device *dev, unsigned int reg)
        case MLXPLAT_CPLD_LPC_REG_AGGRLO_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_AGGRLO_MASK_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_ASIC_HEALTH_OFFSET:
+       case MLXPLAT_CPLD_LPC_REG_ASIC_EVENT_OFFSET:
+       case MLXPLAT_CPLD_LPC_REG_ASIC_MASK_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_PSU_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_PSU_EVENT_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_PSU_MASK_OFFSET:
@@ -1112,6 +1178,8 @@ static bool mlxplat_mlxcpld_volatile_reg(struct device *dev, unsigned int reg)
        case MLXPLAT_CPLD_LPC_REG_AGGRLO_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_AGGRLO_MASK_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_ASIC_HEALTH_OFFSET:
+       case MLXPLAT_CPLD_LPC_REG_ASIC_EVENT_OFFSET:
+       case MLXPLAT_CPLD_LPC_REG_ASIC_MASK_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_PSU_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_PSU_EVENT_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_PSU_MASK_OFFSET: