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Re: [PATCH v2 02/10] softmmu/ioport: Merge portio_list_add() into portio


From: Mark Cave-Ayland
Subject: Re: [PATCH v2 02/10] softmmu/ioport: Merge portio_list_add() into portio_list_init()
Date: Sun, 5 Feb 2023 21:34:02 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.13.0

On 26/01/2023 21:17, Bernhard Beschow wrote:

Both functions are always used together and in the same order. Let's
reflect this in the API.

Inspired-by: <20210518215545.1793947-9-philmd@redhat.com>
           'hw/isa: Extract bus part from isa_register_portio_list()'
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
---
  include/exec/ioport.h   |  6 ++----
  hw/audio/adlib.c        |  4 ++--
  hw/display/qxl.c        |  5 ++---
  hw/display/vga.c        |  8 ++++----
  hw/dma/i82374.c         |  6 ++----
  hw/isa/isa-bus.c        |  6 ++----
  hw/watchdog/wdt_ib700.c |  4 ++--
  softmmu/ioport.c        | 19 +++++++------------
  8 files changed, 23 insertions(+), 35 deletions(-)

diff --git a/include/exec/ioport.h b/include/exec/ioport.h
index e34f668998..ec3e8e5942 100644
--- a/include/exec/ioport.h
+++ b/include/exec/ioport.h
@@ -64,12 +64,10 @@ typedef struct PortioList {
void portio_list_init(PortioList *piolist, Object *owner,
                        const struct MemoryRegionPortio *callbacks,
-                      void *opaque, const char *name);
+                      void *opaque, const char *name,
+                      MemoryRegion *address_space_io, uint16_t start);
  void portio_list_set_flush_coalesced(PortioList *piolist);
  void portio_list_destroy(PortioList *piolist);
-void portio_list_add(PortioList *piolist,
-                     struct MemoryRegion *address_space,
-                     uint32_t addr);
  void portio_list_del(PortioList *piolist);
#endif /* IOPORT_H */
diff --git a/hw/audio/adlib.c b/hw/audio/adlib.c
index 5f979b1487..957abe3da7 100644
--- a/hw/audio/adlib.c
+++ b/hw/audio/adlib.c
@@ -291,8 +291,8 @@ static void adlib_realizefn (DeviceState *dev, Error **errp)
adlib_portio_list[0].offset = s->port;
      adlib_portio_list[1].offset = s->port + 8;
-    portio_list_init (&s->port_list, OBJECT(s), adlib_portio_list, s, "adlib");
-    portio_list_add (&s->port_list, isa_address_space_io(&s->parent_obj), 0);
+    portio_list_init(&s->port_list, OBJECT(s), adlib_portio_list, s, "adlib",
+                     isa_address_space_io(&s->parent_obj), 0);
  }
static Property adlib_properties[] = {
diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index ec712d3ca2..6d5a931425 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -2224,10 +2224,9 @@ static void qxl_realize_primary(PCIDevice *dev, Error 
**errp)
      }
      vga_init(vga, OBJECT(dev),
               pci_address_space(dev), pci_address_space_io(dev), false);
-    portio_list_init(&qxl->vga_port_list, OBJECT(dev), qxl_vga_portio_list,
-                     vga, "vga");
+    portio_list_init(&qxl->vga_port_list, OBJECT(dev), qxl_vga_portio_list, 
vga,
+                     "vga", pci_address_space_io(dev), 0x3b0);
      portio_list_set_flush_coalesced(&qxl->vga_port_list);
-    portio_list_add(&qxl->vga_port_list, pci_address_space_io(dev), 0x3b0);
      qxl->have_vga = true;
vga->con = graphic_console_init(DEVICE(dev), 0, &qxl_ops, qxl);
diff --git a/hw/display/vga.c b/hw/display/vga.c
index 7a5fdff649..2b606a526c 100644
--- a/hw/display/vga.c
+++ b/hw/display/vga.c
@@ -2309,12 +2309,12 @@ void vga_init(VGACommonState *s, Object *obj, 
MemoryRegion *address_space,
                                          1);
      memory_region_set_coalescing(vga_io_memory);
      if (init_vga_ports) {
-        portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga");
+        portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga",
+                         address_space_io, 0x3b0);
          portio_list_set_flush_coalesced(&s->vga_port_list);
-        portio_list_add(&s->vga_port_list, address_space_io, 0x3b0);
      }
      if (vbe_ports) {
-        portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe");
-        portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce);
+        portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe",
+                         address_space_io, 0x1ce);
      }
  }
diff --git a/hw/dma/i82374.c b/hw/dma/i82374.c
index 34c3aaf7d3..5914b34079 100644
--- a/hw/dma/i82374.c
+++ b/hw/dma/i82374.c
@@ -131,10 +131,8 @@ static void i82374_realize(DeviceState *dev, Error **errp)
      }
      i8257_dma_init(isa_bus, true);
- portio_list_init(&s->port_list, OBJECT(s), i82374_portio_list, s,
-                     "i82374");
-    portio_list_add(&s->port_list, isa_address_space_io(&s->parent_obj),
-                    s->iobase);
+    portio_list_init(&s->port_list, OBJECT(s), i82374_portio_list, s, "i82374",
+                     isa_address_space_io(&s->parent_obj), s->iobase);
memset(s->commands, 0, sizeof(s->commands));
  }
diff --git a/hw/isa/isa-bus.c b/hw/isa/isa-bus.c
index 1bee1a47f1..b3497dad61 100644
--- a/hw/isa/isa-bus.c
+++ b/hw/isa/isa-bus.c
@@ -124,8 +124,6 @@ int isa_register_portio_list(ISADevice *dev,
                               const MemoryRegionPortio *pio_start,
                               void *opaque, const char *name)
  {
-    assert(piolist && !piolist->owner);
-
      if (!isabus) {
          return -ENODEV;
      }
@@ -135,8 +133,8 @@ int isa_register_portio_list(ISADevice *dev,
         actually handled e.g. the FDC device.  */
      isa_init_ioport(dev, start);
- portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name);
-    portio_list_add(piolist, isabus->address_space_io, start);
+    portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name,
+                     isabus->address_space_io, start);
return 0;
  }
diff --git a/hw/watchdog/wdt_ib700.c b/hw/watchdog/wdt_ib700.c
index b116c3a3aa..e53e474b83 100644
--- a/hw/watchdog/wdt_ib700.c
+++ b/hw/watchdog/wdt_ib700.c
@@ -115,8 +115,8 @@ static void wdt_ib700_realize(DeviceState *dev, Error 
**errp)
s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, ib700_timer_expired, s); - portio_list_init(&s->port_list, OBJECT(s), wdt_portio_list, s, "ib700");
-    portio_list_add(&s->port_list, isa_address_space_io(&s->parent_obj), 0);
+    portio_list_init(&s->port_list, OBJECT(s), wdt_portio_list, s, "ib700",
+                     isa_address_space_io(&s->parent_obj), 0);
  }
static void wdt_ib700_reset(DeviceState *dev)
diff --git a/softmmu/ioport.c b/softmmu/ioport.c
index 215344467b..c92e3cb27d 100644
--- a/softmmu/ioport.c
+++ b/softmmu/ioport.c
@@ -231,8 +231,13 @@ static void portio_list_add_1(PortioList *piolist,
void portio_list_init(PortioList *piolist, Object *owner,
                        const MemoryRegionPortio *callbacks,
-                      void *opaque, const char *name)
+                      void *opaque, const char *name,
+                      MemoryRegion *address_space_io, uint16_t start)
  {
+    assert(piolist && !piolist->owner);
+
+    const MemoryRegionPortio *pio, *pio_start = callbacks;
+    unsigned int off_low, off_high, off_last, count;
      unsigned n = 0;
while (callbacks[n].size) {
@@ -242,21 +247,11 @@ void portio_list_init(PortioList *piolist, Object *owner,
      piolist->ports = callbacks;
      piolist->nr = 0;
      piolist->regions = g_new0(MemoryRegion *, n);
-    piolist->address_space = NULL;
+    piolist->address_space = address_space_io;
      piolist->opaque = opaque;
      piolist->owner = owner;
      piolist->name = name;
      piolist->flush_coalesced_mmio = false;
-}
-
-void portio_list_add(PortioList *piolist,
-                     MemoryRegion *address_space,
-                     uint32_t start)
-{
-    const MemoryRegionPortio *pio, *pio_start = piolist->ports;
-    unsigned int off_low, off_high, off_last, count;
-
-    piolist->address_space = address_space;
/* Handle the first entry specially. */
      off_last = off_low = pio_start->offset;

As a general comment: is portio used outside of ISA bus devices at all? It seems to me that portio is really a wrapper around the the old x86 IO port functionality, and so I could see PortioList being moved exclusively to within ISADevice which could allow the address_space, opaque and owner to be resolved automatically with the PortioList being owned by ISADevice.


ATB,

Mark.



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