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switchtec: Increase PFF limit from 48 to 255

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The Switchtec devices supports two PCIe Function Frameworks (PFFs) per
upstream port (one for the port itself and one for the management endoint),
and each PFF may have up to 255 ports.  Previously the driver only
supported 48 of those ports, and the SWITCHTEC_IOCTL_EVENT_SUMMARY ioctl
only returned information about those 48.

Increase SWITCHTEC_MAX_PFF_CSR from 48 to 255 so the driver supports all
255 possible ports.

Rename SWITCHTEC_IOCTL_EVENT_SUMMARY and associated struct
switchtec_ioctl_event_summary to SWITCHTEC_IOCTL_EVENT_SUMMARY_LEGACY and
switchtec_ioctl_event_summary_legacy with so existing applications work
unchanged, supporting up to 48 ports.

Add replacement SWITCHTEC_IOCTL_EVENT_SUMMARY and struct
switchtec_ioctl_event_summary that new and recompiled applications support
up to 255 ports.

Signed-off-by: Wesley Sheng <wesley.sheng@microchip.com>
[bhelgaas: changelog]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
This commit is contained in:
Wesley Sheng
2019-04-15 22:41:41 +08:00
committed by Bjorn Helgaas
parent 9e98c678c2
commit ba8a39820d
3 changed files with 40 additions and 14 deletions
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2
include/linux/switchtec.h
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@@ -20,7 +20,7 @@
#include <linux/cdev.h>
#define SWITCHTEC_MRPC_PAYLOAD_SIZE 1024
#define SWITCHTEC_MAX_PFF_CSR 48
#define SWITCHTEC_MAX_PFF_CSR 255
#define SWITCHTEC_EVENT_OCCURRED BIT(0)
#define SWITCHTEC_EVENT_CLEAR BIT(0)