diff mbox series

[v2,04/12] hw/misc/allwinner-dramc: Do not use SysBus API to map local MMIO region

Message ID 20231019071611.98885-5-philmd@linaro.org
State Superseded
Headers show
Series hw: Strengthen SysBus & QBus API | expand

Commit Message

Philippe Mathieu-Daudé Oct. 19, 2023, 7:16 a.m. UTC 
There is no point in exposing an internal MMIO region via
SysBus and directly mapping it in the very same device.

Just map it without using the SysBus API.

Transformation done using the following coccinelle script:

  @@
  expression sbdev;
  expression index;
  expression addr;
  expression subregion;
  @@
  -    sysbus_init_mmio(sbdev, subregion);
       ... when != sbdev
  -    sysbus_mmio_map(sbdev, index, addr);
  +    memory_region_add_subregion(get_system_memory(),
  +                                addr, subregion);

  @@
  expression priority;
  @@
  -    sysbus_init_mmio(sbdev, subregion);
       ... when != sbdev
  -    sysbus_mmio_map_overlap(sbdev, index, addr, priority);
  +    memory_region_add_subregion_overlap(get_system_memory(),
  +                                        addr,
  +                                        subregion, priority);

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/misc/allwinner-r40-dramc.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

Comments

Thomas Huth Oct. 19, 2023, 7:44 a.m. UTC | #1 
On 19/10/2023 09.16, Philippe Mathieu-Daudé wrote:
> There is no point in exposing an internal MMIO region via
> SysBus and directly mapping it in the very same device.
> 
> Just map it without using the SysBus API.
> 
> Transformation done using the following coccinelle script:
> 
>    @@
>    expression sbdev;
>    expression index;
>    expression addr;
>    expression subregion;
>    @@
>    -    sysbus_init_mmio(sbdev, subregion);
>         ... when != sbdev
>    -    sysbus_mmio_map(sbdev, index, addr);
>    +    memory_region_add_subregion(get_system_memory(),
>    +                                addr, subregion);
> 
>    @@
>    expression priority;
>    @@
>    -    sysbus_init_mmio(sbdev, subregion);
>         ... when != sbdev
>    -    sysbus_mmio_map_overlap(sbdev, index, addr, priority);
>    +    memory_region_add_subregion_overlap(get_system_memory(),
>    +                                        addr,
>    +                                        subregion, priority);
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>   hw/misc/allwinner-r40-dramc.c | 13 ++++++-------
>   1 file changed, 6 insertions(+), 7 deletions(-)

Reviewed-by: Thomas Huth <thuth@redhat.com>
diff mbox series

Patch

diff --git a/hw/misc/allwinner-r40-dramc.c b/hw/misc/allwinner-r40-dramc.c
index 2cc0254a55..3d81ddb2e1 100644
--- a/hw/misc/allwinner-r40-dramc.c
+++ b/hw/misc/allwinner-r40-dramc.c
@@ -414,7 +414,6 @@  static void allwinner_r40_dramc_reset(DeviceState *dev)
 static void allwinner_r40_dramc_realize(DeviceState *dev, Error **errp)
 {
     AwR40DramCtlState *s = AW_R40_DRAMC(dev);
-    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 
     if (!get_match_ddr(s->ram_size)) {
         error_report("%s: ram-size %u MiB is not supported",
@@ -422,23 +421,23 @@  static void allwinner_r40_dramc_realize(DeviceState *dev, Error **errp)
         exit(1);
     }
 
-    /* R40 support max 2G memory but we only support up to 1G now. index 3 */
+    /* R40 support max 2G memory but we only support up to 1G now. */
     memory_region_init_io(&s->detect_cells, OBJECT(s),
                           &allwinner_r40_detect_ops, s,
                           "DRAMCELLS", 1 * GiB);
-    sysbus_init_mmio(sbd, &s->detect_cells);
-    sysbus_mmio_map_overlap(sbd, 3, s->ram_addr, 10);
+    memory_region_add_subregion_overlap(get_system_memory(), s->ram_addr,
+                                        &s->detect_cells, 10);
     memory_region_set_enabled(&s->detect_cells, false);
 
     /*
      * We only support DRAM size up to 1G now, so prepare a high memory page
-     * after 1G for dualrank detect. index = 4
+     * after 1G for dualrank detect.
      */
     memory_region_init_io(&s->dram_high, OBJECT(s),
                             &allwinner_r40_dualrank_detect_ops, s,
                             "DRAMHIGH", KiB);
-    sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->dram_high);
-    sysbus_mmio_map(SYS_BUS_DEVICE(s), 4, s->ram_addr + GiB);
+    memory_region_add_subregion(get_system_memory(), s->ram_addr + GiB,
+                                &s->dram_high);
 }
 
 static void allwinner_r40_dramc_init(Object *obj)