drm/amd/pm: avoid unaligned access warnings

When building on OpenBSD/arm64 with clang 15, unaligned access
warnings are seen when a union is embedded inside a packed struct.

drm/amd/pm/powerplay/hwmgr/vega20_pptable.h:136:17: error: field
  smcPPTable within 'struct _ATOM_VEGA20_POWERPLAYTABLE' is less aligned
  than 'PPTable_t' and is usually due to
  'struct _ATOM_VEGA20_POWERPLAYTABLE' being packed, which can lead to
   unaligned accesses [-Werror,-Wunaligned-access]
      PPTable_t smcPPTable;
                ^

Make PPTable_t packed to avoid this.

Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

9 files changed, 18 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/pm/powerplay/inc/smu11_driver_if.h b/drivers/gpu/drm/amd/pm/powerplay/inc/smu11_driver_if.h
index fdc6b7a57bc9..c2efc70ef288 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/inc/smu11_driver_if.h
+++ b/drivers/gpu/drm/amd/pm/powerplay/inc/smu11_driver_if.h
@@ -358,6 +358,7 @@ typedef struct {
   QuadraticInt_t SsCurve;
 } DpmDescriptor_t;
 
+#pragma pack(push, 1)
 typedef struct {
   uint32_t Version;
 
@@ -609,6 +610,7 @@ typedef struct {
   uint32_t     MmHubPadding[8];
 
 } PPTable_t;
+#pragma pack(pop)
 
 typedef struct {
 
diff --git a/drivers/gpu/drm/amd/pm/powerplay/inc/smu9_driver_if.h b/drivers/gpu/drm/amd/pm/powerplay/inc/smu9_driver_if.h
index 2818c98ff5ca..faae4b918d90 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/inc/smu9_driver_if.h
+++ b/drivers/gpu/drm/amd/pm/powerplay/inc/smu9_driver_if.h
@@ -122,6 +122,7 @@ typedef struct {
   uint16_t Vid;  /* min voltage in SVI2 VID */
 } DisplayClockTable_t;
 
+#pragma pack(push, 1)
 typedef struct {
   /* PowerTune */
   uint16_t SocketPowerLimit; /* Watts */
@@ -323,6 +324,7 @@ typedef struct {
   uint32_t     MmHubPadding[3]; /* SMU internal use */
 
 } PPTable_t;
+#pragma pack(pop)
 
 typedef struct {
   uint16_t MinClock; // This is either DCEFCLK or SOCCLK (in MHz)
diff --git a/drivers/gpu/drm/amd/pm/powerplay/inc/vega12/smu9_driver_if.h b/drivers/gpu/drm/amd/pm/powerplay/inc/vega12/smu9_driver_if.h
index b6ffd08784e7..6456bea5d2d5 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/inc/vega12/smu9_driver_if.h
+++ b/drivers/gpu/drm/amd/pm/powerplay/inc/vega12/smu9_driver_if.h
@@ -245,6 +245,7 @@ typedef struct {
   QuadraticInt_t SsCurve;
 } DpmDescriptor_t;
 
+#pragma pack(push, 1)
 typedef struct {
   uint32_t Version;
 
@@ -508,6 +509,7 @@ typedef struct {
   uint32_t     MmHubPadding[7];
 
 } PPTable_t;
+#pragma pack(pop)
 
 typedef struct {
 
diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_arcturus.h b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_arcturus.h
index 43d43d6addc0..d518dee18e1b 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_arcturus.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_arcturus.h
@@ -464,6 +464,7 @@ typedef struct {
   uint16_t       Padding16;
 } DpmDescriptor_t;
 
+#pragma pack(push, 1)
 typedef struct {
   uint32_t Version;
 
@@ -733,6 +734,7 @@ typedef struct {
   uint32_t     MmHubPadding[8]; // SMU internal use
 
 } PPTable_t;
+#pragma pack(pop)
 
 typedef struct {
   // Time constant parameters for clock averages in ms
diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_navi10.h b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_navi10.h
index 04752ade1016..c5c1943fb6a1 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_navi10.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_navi10.h
@@ -515,6 +515,7 @@ typedef struct {
   uint32_t BoardLevelEnergyAccumulator;  
 } OutOfBandMonitor_t;
 
+#pragma pack(push, 1)
 typedef struct {
   uint32_t Version;
 
@@ -814,6 +815,7 @@ typedef struct {
   uint32_t     MmHubPadding[8]; // SMU internal use
 
 } PPTable_t;
+#pragma pack(pop)
 
 typedef struct {
   // Time constant parameters for clock averages in ms
diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_sienna_cichlid.h b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_sienna_cichlid.h
index 351a4af429b3..aa6d29de4002 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_sienna_cichlid.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_sienna_cichlid.h
@@ -599,6 +599,7 @@ typedef struct {
   uint16_t Fmax;
 } UclkDpmChangeRange_t;
 
+#pragma pack(push, 1)
 typedef struct {
   // MAJOR SECTION: SKU PARAMETERS
 
@@ -957,6 +958,7 @@ typedef struct {
   uint32_t     MmHubPadding[8]; // SMU internal use
 
 } PPTable_t;
+#pragma pack(pop)
 
 typedef struct {
   // MAJOR SECTION: SKU PARAMETERS
diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu13_driver_if_aldebaran.h b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu13_driver_if_aldebaran.h
index 7a6075daa7b2..90200f31ff52 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu13_driver_if_aldebaran.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu13_driver_if_aldebaran.h
@@ -267,6 +267,7 @@ typedef struct {
   QuadraticInt_t SsCurve;             // Slow-slow curve (GHz->V)
 } DpmDescriptor_t;
 
+#pragma pack(push, 1)
 typedef struct {
   uint32_t Version;
 
@@ -448,6 +449,7 @@ typedef struct {
   uint32_t reserved[14];
 
 } PPTable_t;
+#pragma pack(pop)
 
 typedef struct {
   // Time constant parameters for clock averages in ms
diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu13_driver_if_v13_0_0.h b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu13_driver_if_v13_0_0.h
index 4bc7aee4d44f..b686fb68a6e7 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu13_driver_if_v13_0_0.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu13_driver_if_v13_0_0.h
@@ -1347,10 +1347,12 @@ typedef struct {
   uint32_t     MmHubPadding[8];
 } BoardTable_t;
 
+#pragma pack(push, 1)
 typedef struct {
   SkuTable_t SkuTable;
   BoardTable_t BoardTable;
 } PPTable_t;
+#pragma pack(pop)
 
 typedef struct {
   // Time constant parameters for clock averages in ms
diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu13_driver_if_v13_0_7.h b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu13_driver_if_v13_0_7.h
index 48a3a3952ceb..4c46a0392451 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu13_driver_if_v13_0_7.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu13_driver_if_v13_0_7.h
@@ -1380,10 +1380,12 @@ typedef struct {
   uint32_t     MmHubPadding[8];
 } BoardTable_t;
 
+#pragma pack(push, 1)
 typedef struct {
   SkuTable_t SkuTable;
   BoardTable_t BoardTable;
 } PPTable_t;
+#pragma pack(pop)
 
 typedef struct {
   // Time constant parameters for clock averages in ms