mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-17 01:16:42 +07:00
594ff7d067
The new flash.c file contains the logic to flash a new image on the adapter, through a hcall. It is an iterative process, with chunks of data of 1M at a time. There are also 2 phases: write and verify. The flash operation itself is driven from a user-land tool. Once flashing is successful, an rtas call is made to update the device tree with the new properties values for the adapter and the AFU(s) Add a new char device for the adapter, so that the flash tool can access the card, even if there is no valid AFU on it. Co-authored-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com> Reviewed-by: Manoj Kumar <manoj@linux.vnet.ibm.com> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
94 lines
1.9 KiB
C
94 lines
1.9 KiB
C
/*
|
|
* Copyright 2014 IBM Corp.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/rcupdate.h>
|
|
#include <asm/errno.h>
|
|
#include <misc/cxl-base.h>
|
|
#include "cxl.h"
|
|
|
|
/* protected by rcu */
|
|
static struct cxl_calls *cxl_calls;
|
|
|
|
atomic_t cxl_use_count = ATOMIC_INIT(0);
|
|
EXPORT_SYMBOL(cxl_use_count);
|
|
|
|
#ifdef CONFIG_CXL_MODULE
|
|
|
|
static inline struct cxl_calls *cxl_calls_get(void)
|
|
{
|
|
struct cxl_calls *calls = NULL;
|
|
|
|
rcu_read_lock();
|
|
calls = rcu_dereference(cxl_calls);
|
|
if (calls && !try_module_get(calls->owner))
|
|
calls = NULL;
|
|
rcu_read_unlock();
|
|
|
|
return calls;
|
|
}
|
|
|
|
static inline void cxl_calls_put(struct cxl_calls *calls)
|
|
{
|
|
BUG_ON(calls != cxl_calls);
|
|
|
|
/* we don't need to rcu this, as we hold a reference to the module */
|
|
module_put(cxl_calls->owner);
|
|
}
|
|
|
|
#else /* !defined CONFIG_CXL_MODULE */
|
|
|
|
static inline struct cxl_calls *cxl_calls_get(void)
|
|
{
|
|
return cxl_calls;
|
|
}
|
|
|
|
static inline void cxl_calls_put(struct cxl_calls *calls) { }
|
|
|
|
#endif /* CONFIG_CXL_MODULE */
|
|
|
|
void cxl_slbia(struct mm_struct *mm)
|
|
{
|
|
struct cxl_calls *calls;
|
|
|
|
calls = cxl_calls_get();
|
|
if (!calls)
|
|
return;
|
|
|
|
if (cxl_ctx_in_use())
|
|
calls->cxl_slbia(mm);
|
|
|
|
cxl_calls_put(calls);
|
|
}
|
|
|
|
int register_cxl_calls(struct cxl_calls *calls)
|
|
{
|
|
if (cxl_calls)
|
|
return -EBUSY;
|
|
|
|
rcu_assign_pointer(cxl_calls, calls);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(register_cxl_calls);
|
|
|
|
void unregister_cxl_calls(struct cxl_calls *calls)
|
|
{
|
|
BUG_ON(cxl_calls->owner != calls->owner);
|
|
RCU_INIT_POINTER(cxl_calls, NULL);
|
|
synchronize_rcu();
|
|
}
|
|
EXPORT_SYMBOL_GPL(unregister_cxl_calls);
|
|
|
|
int cxl_update_properties(struct device_node *dn,
|
|
struct property *new_prop)
|
|
{
|
|
return of_update_property(dn, new_prop);
|
|
}
|
|
EXPORT_SYMBOL_GPL(cxl_update_properties);
|