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PCI/switchtec: Add Gen4 system info register support

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Add the Gen4-specific system info registers and ensure their usage is
guarded by a check on the device's generation.

Link: https://lore.kernel.org/r/20200115035648.2578-6-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 20:56:46 -07:00
committed by Bjorn Helgaas
parent 993d208daa
commit a3321ca394
2 changed files with 48 additions and 0 deletions
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5
drivers/pci/switch/switchtec.c
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@@ -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; \
} \
@@ -1429,6 +1432,8 @@ 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;