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[PATCH 1/8] pc-bios: s390x: Consolidate timing functions into time.h

Janosch Frank posted 8 patches 5 years, 10 months ago
Maintainers: Thomas Huth <thuth@redhat.com>, Cornelia Huck <cohuck@redhat.com>, Christian Borntraeger <borntraeger@de.ibm.com>
There is a newer version of this series
[PATCH 1/8] pc-bios: s390x: Consolidate timing functions into time.h
Posted by Janosch Frank 5 years, 10 months ago 
Let's consolidate timing related functions into one header.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
---
 pc-bios/s390-ccw/menu.c        |  1 +
 pc-bios/s390-ccw/netmain.c     | 15 +++----------
 pc-bios/s390-ccw/s390-ccw.h    | 18 ----------------
 pc-bios/s390-ccw/time.h        | 39 ++++++++++++++++++++++++++++++++++
 pc-bios/s390-ccw/virtio-net.c  |  1 +
 pc-bios/s390-ccw/virtio-scsi.c |  1 +
 pc-bios/s390-ccw/virtio.c      | 18 +++-------------
 7 files changed, 48 insertions(+), 45 deletions(-)
 create mode 100644 pc-bios/s390-ccw/time.h

diff --git a/pc-bios/s390-ccw/menu.c b/pc-bios/s390-ccw/menu.c
index ce3815b2010d20cb..7925c33248836913 100644
--- a/pc-bios/s390-ccw/menu.c
+++ b/pc-bios/s390-ccw/menu.c
@@ -12,6 +12,7 @@
 #include "libc.h"
 #include "s390-ccw.h"
 #include "sclp.h"
+#include "time.h"
 
 #define KEYCODE_NO_INP '\0'
 #define KEYCODE_ESCAPE '\033'
diff --git a/pc-bios/s390-ccw/netmain.c b/pc-bios/s390-ccw/netmain.c
index 309ffa30d9922077..a8e2b1b6233735d8 100644
--- a/pc-bios/s390-ccw/netmain.c
+++ b/pc-bios/s390-ccw/netmain.c
@@ -35,6 +35,7 @@
 #include "s390-ccw.h"
 #include "cio.h"
 #include "virtio.h"
+#include "time.h"
 
 #define DEFAULT_BOOT_RETRIES 10
 #define DEFAULT_TFTP_RETRIES 20
@@ -57,24 +58,14 @@ static SubChannelId net_schid = { .one = 1 };
 static uint8_t mac[6];
 static uint64_t dest_timer;
 
-static uint64_t get_timer_ms(void)
-{
-    uint64_t clk;
-
-    asm volatile(" stck %0 " : : "Q"(clk) : "memory");
-
-    /* Bit 51 is incremented each microsecond */
-    return (clk >> (63 - 51)) / 1000;
-}
-
 void set_timer(int val)
 {
-    dest_timer = get_timer_ms() + val;
+    dest_timer = get_time_milli() + val;
 }
 
 int get_timer(void)
 {
-    return dest_timer - get_timer_ms();
+    return dest_timer - get_time_milli();
 }
 
 int get_sec_ticks(void)
diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index 21f27e79906ea297..c5820e43aed143d0 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -74,8 +74,6 @@ unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
 bool virtio_is_supported(SubChannelId schid);
 void virtio_blk_setup_device(SubChannelId schid);
 int virtio_read(ulong sector, void *load_addr);
-u64 get_clock(void);
-ulong get_second(void);
 
 /* bootmap.c */
 void zipl_load(void);
@@ -144,24 +142,8 @@ static inline void debug_print_addr(const char *desc, void *p)
 #define KVM_S390_VIRTIO_SET_STATUS      2
 #define KVM_S390_VIRTIO_CCW_NOTIFY      3
 
-static inline void yield(void)
-{
-    asm volatile ("diag 0,0,0x44"
-                  : :
-                  : "memory", "cc");
-}
-
 #define MAX_SECTOR_SIZE 4096
 
-static inline void sleep(unsigned int seconds)
-{
-    ulong target = get_second() + seconds;
-
-    while (get_second() < target) {
-        yield();
-    }
-}
-
 static inline void IPL_assert(bool term, const char *message)
 {
     if (!term) {
diff --git a/pc-bios/s390-ccw/time.h b/pc-bios/s390-ccw/time.h
new file mode 100644
index 0000000000000000..98f5acaa33b500bd
--- /dev/null
+++ b/pc-bios/s390-ccw/time.h
@@ -0,0 +1,39 @@
+#ifndef TIME_H
+#define TIME_H
+
+static inline u64 get_clock(void)
+{
+    u64 r;
+
+    asm volatile("stck %0" : "=Q" (r) : : "cc");
+    return r;
+}
+
+static inline u64 get_time_milli(void)
+{
+    /* Bit 51 is incremented each microsecond */
+    return (get_clock() >> 12) / 1000;
+}
+
+static inline u64 get_time_seconds(void)
+{
+    return (get_time_milli()) / 1000;
+}
+
+static inline void yield(void)
+{
+    asm volatile ("diag 0,0,0x44"
+                  : :
+                  : "memory", "cc");
+}
+
+static inline void sleep(unsigned int seconds)
+{
+    ulong target = get_time_seconds() + seconds;
+
+    while (get_time_seconds() < target) {
+        yield();
+    }
+}
+
+#endif
diff --git a/pc-bios/s390-ccw/virtio-net.c b/pc-bios/s390-ccw/virtio-net.c
index ff7f4dad2597eeae..4de03728bb648be1 100644
--- a/pc-bios/s390-ccw/virtio-net.c
+++ b/pc-bios/s390-ccw/virtio-net.c
@@ -19,6 +19,7 @@
 #include <ethernet.h>
 #include "s390-ccw.h"
 #include "virtio.h"
+#include "time.h"
 
 #ifndef DEBUG_VIRTIO_NET
 #define DEBUG_VIRTIO_NET 0
diff --git a/pc-bios/s390-ccw/virtio-scsi.c b/pc-bios/s390-ccw/virtio-scsi.c
index 4fe4b9d261a6c88d..0620651da82d569d 100644
--- a/pc-bios/s390-ccw/virtio-scsi.c
+++ b/pc-bios/s390-ccw/virtio-scsi.c
@@ -14,6 +14,7 @@
 #include "virtio.h"
 #include "scsi.h"
 #include "virtio-scsi.h"
+#include "time.h"
 
 static ScsiDevice default_scsi_device;
 static VirtioScsiCmdReq req;
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index fb40ca982853a8d7..43717b83d7b2a9b9 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -15,6 +15,7 @@
 #include "virtio-scsi.h"
 #include "bswap.h"
 #include "helper.h"
+#include "time.h"
 
 #define VRING_WAIT_REPLY_TIMEOUT 30
 
@@ -157,19 +158,6 @@ void vring_send_buf(VRing *vr, void *p, int len, int flags)
     }
 }
 
-u64 get_clock(void)
-{
-    u64 r;
-
-    asm volatile("stck %0" : "=Q" (r) : : "cc");
-    return r;
-}
-
-ulong get_second(void)
-{
-    return (get_clock() >> 12) / 1000000;
-}
-
 int vr_poll(VRing *vr)
 {
     if (vr->used->idx == vr->used_idx) {
@@ -194,7 +182,7 @@ int vr_poll(VRing *vr)
  */
 int vring_wait_reply(void)
 {
-    ulong target_second = get_second() + vdev.wait_reply_timeout;
+    ulong target_second = get_time_seconds() + vdev.wait_reply_timeout;
 
     /* Wait for any queue to be updated by the host */
     do {
@@ -207,7 +195,7 @@ int vring_wait_reply(void)
         if (r) {
             return 0;
         }
-    } while (!vdev.wait_reply_timeout || (get_second() < target_second));
+    } while (!vdev.wait_reply_timeout || (get_time_seconds() < target_second));
 
     return 1;
 }
-- 
2.25.1
Re: [PATCH 1/8] pc-bios: s390x: Consolidate timing functions into time.h
Posted by David Hildenbrand 5 years, 10 months ago 
On 24.03.20 16:08, Janosch Frank wrote:
> Let's consolidate timing related functions into one header.
> 
> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
> ---
>  pc-bios/s390-ccw/menu.c        |  1 +
>  pc-bios/s390-ccw/netmain.c     | 15 +++----------
>  pc-bios/s390-ccw/s390-ccw.h    | 18 ----------------
>  pc-bios/s390-ccw/time.h        | 39 ++++++++++++++++++++++++++++++++++
>  pc-bios/s390-ccw/virtio-net.c  |  1 +
>  pc-bios/s390-ccw/virtio-scsi.c |  1 +
>  pc-bios/s390-ccw/virtio.c      | 18 +++-------------
>  7 files changed, 48 insertions(+), 45 deletions(-)
>  create mode 100644 pc-bios/s390-ccw/time.h
> 
> diff --git a/pc-bios/s390-ccw/menu.c b/pc-bios/s390-ccw/menu.c
> index ce3815b2010d20cb..7925c33248836913 100644
> --- a/pc-bios/s390-ccw/menu.c
> +++ b/pc-bios/s390-ccw/menu.c
> @@ -12,6 +12,7 @@
>  #include "libc.h"
>  #include "s390-ccw.h"
>  #include "sclp.h"
> +#include "time.h"
>  
>  #define KEYCODE_NO_INP '\0'
>  #define KEYCODE_ESCAPE '\033'
> diff --git a/pc-bios/s390-ccw/netmain.c b/pc-bios/s390-ccw/netmain.c
> index 309ffa30d9922077..a8e2b1b6233735d8 100644
> --- a/pc-bios/s390-ccw/netmain.c
> +++ b/pc-bios/s390-ccw/netmain.c
> @@ -35,6 +35,7 @@
>  #include "s390-ccw.h"
>  #include "cio.h"
>  #include "virtio.h"
> +#include "time.h"
>  
>  #define DEFAULT_BOOT_RETRIES 10
>  #define DEFAULT_TFTP_RETRIES 20
> @@ -57,24 +58,14 @@ static SubChannelId net_schid = { .one = 1 };
>  static uint8_t mac[6];
>  static uint64_t dest_timer;
>  
> -static uint64_t get_timer_ms(void)
> -{
> -    uint64_t clk;
> -
> -    asm volatile(" stck %0 " : : "Q"(clk) : "memory");
> -
> -    /* Bit 51 is incremented each microsecond */
> -    return (clk >> (63 - 51)) / 1000;
> -}
> -
>  void set_timer(int val)
>  {
> -    dest_timer = get_timer_ms() + val;
> +    dest_timer = get_time_milli() + val;
>  }
>  
>  int get_timer(void)
>  {
> -    return dest_timer - get_timer_ms();
> +    return dest_timer - get_time_milli();
>  }
>  
>  int get_sec_ticks(void)
> diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
> index 21f27e79906ea297..c5820e43aed143d0 100644
> --- a/pc-bios/s390-ccw/s390-ccw.h
> +++ b/pc-bios/s390-ccw/s390-ccw.h
> @@ -74,8 +74,6 @@ unsigned long virtio_load_direct(ulong rec_list1, ulong rec_list2,
>  bool virtio_is_supported(SubChannelId schid);
>  void virtio_blk_setup_device(SubChannelId schid);
>  int virtio_read(ulong sector, void *load_addr);
> -u64 get_clock(void);
> -ulong get_second(void);
>  
>  /* bootmap.c */
>  void zipl_load(void);
> @@ -144,24 +142,8 @@ static inline void debug_print_addr(const char *desc, void *p)
>  #define KVM_S390_VIRTIO_SET_STATUS      2
>  #define KVM_S390_VIRTIO_CCW_NOTIFY      3
>  
> -static inline void yield(void)
> -{
> -    asm volatile ("diag 0,0,0x44"
> -                  : :
> -                  : "memory", "cc");
> -}
> -
>  #define MAX_SECTOR_SIZE 4096
>  
> -static inline void sleep(unsigned int seconds)
> -{
> -    ulong target = get_second() + seconds;
> -
> -    while (get_second() < target) {
> -        yield();
> -    }
> -}
> -
>  static inline void IPL_assert(bool term, const char *message)
>  {
>      if (!term) {
> diff --git a/pc-bios/s390-ccw/time.h b/pc-bios/s390-ccw/time.h
> new file mode 100644
> index 0000000000000000..98f5acaa33b500bd
> --- /dev/null
> +++ b/pc-bios/s390-ccw/time.h
> @@ -0,0 +1,39 @@
> +#ifndef TIME_H
> +#define TIME_H
> +
> +static inline u64 get_clock(void)
> +{
> +    u64 r;
> +
> +    asm volatile("stck %0" : "=Q" (r) : : "cc");
> +    return r;
> +}
> +
> +static inline u64 get_time_milli(void)

Milli Vanilli?

Please, just use common abbreviations. "ms" is certainly good enough.


-- 
Thanks,

David / dhildenb

Patchew 2.1-devel-b67e4c2

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