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Subject[PATCH v2 5/7] PCI/switchtec: Add gen4 support for the system info registers
Add the gen4 specific system info registers and ensure their usage is
guarded by a check on the device's generation.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
---
drivers/pci/switch/switchtec.c | 5 ++++
include/linux/switchtec.h | 43 ++++++++++++++++++++++++++++++++++
2 files changed, 48 insertions(+)

diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index 3bdec509f948..0062225db50f 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -321,6 +321,9 @@ static ssize_t field ## _show(struct device *dev, \
if (stdev->gen == SWITCHTEC_GEN3) \
return io_string_show(buf, &si->gen3.field, \
sizeof(si->gen3.field)); \
+ else if (stdev->gen == SWITCHTEC_GEN4) \
+ return io_string_show(buf, &si->gen4.field, \
+ sizeof(si->gen4.field)); \
else \
return -ENOTSUPP; \
} \
@@ -1435,6 +1438,8 @@ static int switchtec_init_pci(struct switchtec_dev *stdev,

if (stdev->gen == SWITCHTEC_GEN3)
part_id = &stdev->mmio_sys_info->gen3.partition_id;
+ else if (stdev->gen == SWITCHTEC_GEN4)
+ part_id = &stdev->mmio_sys_info->gen4.partition_id;
else
return -ENOTSUPP;

diff --git a/include/linux/switchtec.h b/include/linux/switchtec.h
index 73817d02db1e..ea217af5260e 100644
--- a/include/linux/switchtec.h
+++ b/include/linux/switchtec.h
@@ -39,6 +39,7 @@ enum {

enum switchtec_gen {
SWITCHTEC_GEN3,
+ SWITCHTEC_GEN4,
};

struct mrpc_regs {
@@ -130,12 +131,54 @@ struct sys_info_regs_gen3 {
u8 component_revision;
} __packed;

+struct sys_info_regs_gen4 {
+ u16 gas_layout_ver;
+ u8 evlist_ver;
+ u8 reserved1;
+ u16 mgmt_cmd_set_ver;
+ u16 fabric_cmd_set_ver;
+ u32 reserved2[2];
+ u8 mrpc_uart_ver;
+ u8 mrpc_twi_ver;
+ u8 mrpc_eth_ver;
+ u8 mrpc_inband_ver;
+ u32 reserved3[7];
+ u32 fw_update_tmo;
+ u32 xml_version_cfg;
+ u32 xml_version_img;
+ u32 partition_id;
+ u16 bl2_running;
+ u16 cfg_running;
+ u16 img_running;
+ u16 key_running;
+ u32 reserved4[43];
+ u32 vendor_seeprom_twi;
+ u32 vendor_table_revision;
+ u32 vendor_specific_info[2];
+ u16 p2p_vendor_id;
+ u16 p2p_device_id;
+ u8 p2p_revision_id;
+ u8 reserved5[3];
+ u32 p2p_class_id;
+ u16 subsystem_vendor_id;
+ u16 subsystem_id;
+ u32 p2p_serial_number[2];
+ u8 mac_addr[6];
+ u8 reserved6[2];
+ u32 reserved7[3];
+ char vendor_id[8];
+ char product_id[24];
+ char product_revision[2];
+ u16 reserved8;
+} __packed;
+
struct sys_info_regs {
u32 device_id;
u32 device_version;
u32 firmware_version;
union {
struct sys_info_regs_gen3 gen3;
+ struct sys_info_regs_gen4 gen4;
};
} __packed;

--
2.20.1
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