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PCI/switchtec: Separate Gen3 register structures into unions

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Since the sys_info and flash_info registers differ significantly in Gen4
hardware, separate out the Gen3 registers into their own structure with a
union in the main structure.

No functional changes intended.

Link: https://lore.kernel.org/r/20200115035648.2578-5-logang@deltatee.com
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Logan Gunthorpe 2020-01-14 20:56:45 -07:00 committed by Bjorn Helgaas
parent 6a3d1b542c
commit 993d208daa
2 changed files with 54 additions and 25 deletions
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38
drivers/pci/switch/switchtec.c
View File

@ -317,8 +317,12 @@ static ssize_t field ## _show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct switchtec_dev *stdev = to_stdev(dev); \
return io_string_show(buf, &stdev->mmio_sys_info->field, \
sizeof(stdev->mmio_sys_info->field)); \
struct sys_info_regs __iomem *si = stdev->mmio_sys_info; \
if (stdev->gen == SWITCHTEC_GEN3) \
return io_string_show(buf, &si->gen3.field, \
sizeof(si->gen3.field)); \
else \
return -ENOTSUPP; \
} \
\
static DEVICE_ATTR_RO(field)
@ -337,8 +341,8 @@ static ssize_t component_vendor_show(struct device *dev,
if (stdev->gen != SWITCHTEC_GEN3)
return sprintf(buf, "none\n");
return io_string_show(buf, &si->component_vendor,
sizeof(si->component_vendor));
return io_string_show(buf, &si->gen3.component_vendor,
sizeof(si->gen3.component_vendor));
}
static DEVICE_ATTR_RO(component_vendor);
@ -346,7 +350,7 @@ static ssize_t component_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct switchtec_dev *stdev = to_stdev(dev);
int id = ioread16(&stdev->mmio_sys_info->component_id);
int id = ioread16(&stdev->mmio_sys_info->gen3.component_id);
/* component_id field not supported after gen3 */
if (stdev->gen != SWITCHTEC_GEN3)
@ -360,7 +364,7 @@ static ssize_t component_revision_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct switchtec_dev *stdev = to_stdev(dev);
int rev = ioread8(&stdev->mmio_sys_info->component_revision);
int rev = ioread8(&stdev->mmio_sys_info->gen3.component_revision);
/* component_revision field not supported after gen3 */
if (stdev->gen != SWITCHTEC_GEN3)
@ -590,8 +594,12 @@ static int ioctl_flash_info(struct switchtec_dev *stdev,
struct switchtec_ioctl_flash_info info = {0};
struct flash_info_regs __iomem *fi = stdev->mmio_flash_info;
info.flash_length = ioread32(&fi->flash_length);
info.num_partitions = SWITCHTEC_NUM_PARTITIONS_GEN3;
if (stdev->gen == SWITCHTEC_GEN3) {
info.flash_length = ioread32(&fi->gen3.flash_length);
info.num_partitions = SWITCHTEC_NUM_PARTITIONS_GEN3;
} else {
return -ENOTSUPP;
}
if (copy_to_user(uinfo, &info, sizeof(info)))
return -EFAULT;
@ -609,8 +617,9 @@ static void set_fw_info_part(struct switchtec_ioctl_flash_part_info *info,
static int flash_part_info_gen3(struct switchtec_dev *stdev,
struct switchtec_ioctl_flash_part_info *info)
{
struct flash_info_regs __iomem *fi = stdev->mmio_flash_info;
struct sys_info_regs __iomem *si = stdev->mmio_sys_info;
struct flash_info_regs_gen3 __iomem *fi =
&stdev->mmio_flash_info->gen3;
struct sys_info_regs_gen3 __iomem *si = &stdev->mmio_sys_info->gen3;
u32 active_addr = -1;
switch (info->flash_partition) {
@ -1382,6 +1391,7 @@ static int switchtec_init_pci(struct switchtec_dev *stdev,
int rc;
void __iomem *map;
unsigned long res_start, res_len;
u32 __iomem *part_id;
rc = pcim_enable_device(pdev);
if (rc)
@ -1416,7 +1426,13 @@ static int switchtec_init_pci(struct switchtec_dev *stdev,
stdev->mmio_sys_info = stdev->mmio + SWITCHTEC_GAS_SYS_INFO_OFFSET;
stdev->mmio_flash_info = stdev->mmio + SWITCHTEC_GAS_FLASH_INFO_OFFSET;
stdev->mmio_ntb = stdev->mmio + SWITCHTEC_GAS_NTB_OFFSET;
stdev->partition = ioread8(&stdev->mmio_sys_info->partition_id);
if (stdev->gen == SWITCHTEC_GEN3)
part_id = &stdev->mmio_sys_info->gen3.partition_id;
else
return -ENOTSUPP;
stdev->partition = ioread8(part_id);
stdev->partition_count = ioread8(&stdev->mmio_ntb->partition_count);
stdev->mmio_part_cfg_all = stdev->mmio + SWITCHTEC_GAS_PART_CFG_OFFSET;
stdev->mmio_part_cfg = &stdev->mmio_part_cfg_all[stdev->partition];

41
include/linux/switchtec.h
View File

@ -108,10 +108,7 @@ enum {
SWITCHTEC_GEN3_IMG1_RUNNING = 0x07,
};
struct sys_info_regs {
u32 device_id;
u32 device_version;
u32 firmware_version;
struct sys_info_regs_gen3 {
u32 reserved1;
u32 vendor_table_revision;
u32 table_format_version;
@ -128,26 +125,36 @@ struct sys_info_regs {
u8 component_revision;
} __packed;
struct flash_info_regs {
struct sys_info_regs {
u32 device_id;
u32 device_version;
u32 firmware_version;
union {
struct sys_info_regs_gen3 gen3;
};
} __packed;
struct partition_info {
u32 address;
u32 length;
};
struct flash_info_regs_gen3 {
u32 flash_part_map_upd_idx;
struct active_partition_info {
struct active_partition_info_gen3 {
u32 address;
u32 build_version;
u32 build_string;
} active_img;
struct active_partition_info active_cfg;
struct active_partition_info inactive_img;
struct active_partition_info inactive_cfg;
struct active_partition_info_gen3 active_cfg;
struct active_partition_info_gen3 inactive_img;
struct active_partition_info_gen3 inactive_cfg;
u32 flash_length;
struct partition_info {
u32 address;
u32 length;
} cfg0;
struct partition_info cfg0;
struct partition_info cfg1;
struct partition_info img0;
struct partition_info img1;
@ -155,6 +162,12 @@ struct flash_info_regs {
struct partition_info vendor[8];
};
struct flash_info_regs {
union {
struct flash_info_regs_gen3 gen3;
};
};
enum {
SWITCHTEC_NTB_REG_INFO_OFFSET = 0x0000,
SWITCHTEC_NTB_REG_CTRL_OFFSET = 0x4000,