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From: Christoph Hellwig <hch@lst.de>
To: Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org
Subject: [PATCH 4/4] iommu/amd: move a few prototypes to include/linux/amd-iommu.h
Date: Fri,  2 Apr 2021 16:33:12 +0200	[thread overview]
Message-ID: <20210402143312.372386-5-hch@lst.de> (raw)
In-Reply-To: <20210402143312.372386-1-hch@lst.de>

A few functions that were intentended for the perf events support are
currently declared in arch/x86/events/amd/iommu.h, which mens they are
not in scope for the actual function definition.  Also amdkfd has started
using a few of them using externs in a .c file.  End that misery by
moving the prototypes to the proper header.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/x86/events/amd/iommu.c            |  1 +
 arch/x86/events/amd/iommu.h            | 19 -------------------
 drivers/gpu/drm/amd/amdkfd/kfd_iommu.c |  4 ----
 drivers/iommu/amd/amd_iommu.h          |  1 -
 include/linux/amd-iommu.h              | 12 ++++++++++++
 5 files changed, 13 insertions(+), 24 deletions(-)

diff --git a/arch/x86/events/amd/iommu.c b/arch/x86/events/amd/iommu.c
index be50ef8572cceb..a573fac1ece8c8 100644
--- a/arch/x86/events/amd/iommu.c
+++ b/arch/x86/events/amd/iommu.c
@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/cpumask.h>
 #include <linux/slab.h>
+#include <linux/amd-iommu.h>
 
 #include "../perf_event.h"
 #include "iommu.h"
diff --git a/arch/x86/events/amd/iommu.h b/arch/x86/events/amd/iommu.h
index 0e5c036fd7bea1..095505c6213b03 100644
--- a/arch/x86/events/amd/iommu.h
+++ b/arch/x86/events/amd/iommu.h
@@ -21,23 +21,4 @@
 #define PC_MAX_SPEC_BNKS			64
 #define PC_MAX_SPEC_CNTRS			16
 
-struct amd_iommu;
-
-/* amd_iommu_init.c external support functions */
-extern int amd_iommu_get_num_iommus(void);
-
-extern bool amd_iommu_pc_supported(void);
-
-extern u8 amd_iommu_pc_get_max_banks(unsigned int idx);
-
-extern u8 amd_iommu_pc_get_max_counters(unsigned int idx);
-
-extern int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
-				u8 fxn, u64 *value);
-
-extern int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
-				u8 fxn, u64 *value);
-
-extern struct amd_iommu *get_amd_iommu(int idx);
-
 #endif /*_PERF_EVENT_AMD_IOMMU_H_*/
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_iommu.c b/drivers/gpu/drm/amd/amdkfd/kfd_iommu.c
index 66bbca61e3ef5e..3c56333bbb9cdd 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_iommu.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_iommu.c
@@ -329,10 +329,6 @@ int kfd_iommu_resume(struct kfd_dev *kfd)
 	return 0;
 }
 
-extern bool amd_iommu_pc_supported(void);
-extern u8 amd_iommu_pc_get_max_banks(u16 devid);
-extern u8 amd_iommu_pc_get_max_counters(u16 devid);
-
 /** kfd_iommu_add_perf_counters - Add IOMMU performance counters to topology
  */
 int kfd_iommu_add_perf_counters(struct kfd_topology_device *kdev)
diff --git a/drivers/iommu/amd/amd_iommu.h b/drivers/iommu/amd/amd_iommu.h
index ed46dc754a2ad4..55dd38d814d926 100644
--- a/drivers/iommu/amd/amd_iommu.h
+++ b/drivers/iommu/amd/amd_iommu.h
@@ -11,7 +11,6 @@
 
 #include "amd_iommu_types.h"
 
-extern int amd_iommu_get_num_iommus(void);
 extern int amd_iommu_init_dma_ops(void);
 extern int amd_iommu_init_passthrough(void);
 extern irqreturn_t amd_iommu_int_thread(int irq, void *data);
diff --git a/include/linux/amd-iommu.h b/include/linux/amd-iommu.h
index 474065ed88a495..58e6c3806c09d4 100644
--- a/include/linux/amd-iommu.h
+++ b/include/linux/amd-iommu.h
@@ -10,6 +10,8 @@
 
 #include <linux/types.h>
 
+struct amd_iommu;
+
 /*
  * This is mainly used to communicate information back-and-forth
  * between SVM and IOMMU for setting up and tearing down posted
@@ -194,4 +196,14 @@ static inline int amd_iommu_deactivate_guest_mode(void *data)
 }
 #endif /* defined(CONFIG_AMD_IOMMU) && defined(CONFIG_IRQ_REMAP) */
 
+int amd_iommu_get_num_iommus(void);
+bool amd_iommu_pc_supported(void);
+u8 amd_iommu_pc_get_max_banks(unsigned int idx);
+u8 amd_iommu_pc_get_max_counters(unsigned int idx);
+int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
+		u64 *value);
+int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn,
+		u64 *value);
+struct amd_iommu *get_amd_iommu(unsigned int idx);
+
 #endif /* _ASM_X86_AMD_IOMMU_H */
-- 
2.30.1

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  parent reply	other threads:[~2021-04-02 14:33 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-02 14:33 AMD IOMMU cleanups and dead code removal Christoph Hellwig
2021-04-02 14:33 ` [PATCH 1/4] iommu/amd: remove the unused device errata code Christoph Hellwig
2021-04-02 14:33 ` [PATCH 2/4] iommu/amd: remove the unused amd_iommu_get_v2_domain function Christoph Hellwig
2021-04-02 14:33 ` [PATCH 3/4] iommu/amd: remove a few unused exports Christoph Hellwig
2021-04-02 14:33 ` Christoph Hellwig [this message]
2021-04-07  9:15 ` AMD IOMMU cleanups and dead code removal Joerg Roedel

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