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Re: [PATCH v5 08/15] acpi: move aml builder code for floppy device

From: Philippe Mathieu-Daudé
Subject: Re: [PATCH v5 08/15] acpi: move aml builder code for floppy device
Date: Thu, 7 May 2020 16:05:10 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 
+Hervé

On 5/7/20 3:16 PM, Gerd Hoffmann wrote:

Signed-off-by: Gerd Hoffmann <address@hidden>
Reviewed-by: Igor Mammedov <address@hidden>
---
  hw/block/fdc.c       | 83 ++++++++++++++++++++++++++++++++++++++++++++
  hw/i386/acpi-build.c | 83 --------------------------------------------
  stubs/cmos.c         |  7 ++++
  stubs/Makefile.objs  |  1 +
  4 files changed, 91 insertions(+), 83 deletions(-)
  create mode 100644 stubs/cmos.c

diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index 9628cc171ef8..40faa088b5f7 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -32,6 +32,8 @@
  #include "qapi/error.h"
  #include "qemu/error-report.h"
  #include "qemu/timer.h"
+#include "hw/i386/pc.h"
I'd rather not see this target-specific header used in the generic device model... The culprit seems cmos_get_fd_drive_type(). Is the value really PC specific? 

Hervé, do you know if such info & RTC nvram layout is used in other arch?


+#include "hw/acpi/aml-build.h"
  #include "hw/irq.h"
  #include "hw/isa/isa.h"
  #include "hw/qdev-properties.h"
@@ -2765,6 +2767,85 @@ void isa_fdc_get_drive_max_chs(FloppyDriveType type,
      (*maxc)--;
  }
+static Aml *build_fdinfo_aml(int idx, FloppyDriveType type) 
+{
+    Aml *dev, *fdi;
+    uint8_t maxc, maxh, maxs;
+
+    isa_fdc_get_drive_max_chs(type, &maxc, &maxh, &maxs);
+
+    dev = aml_device("FLP%c", 'A' + idx);
+
+    aml_append(dev, aml_name_decl("_ADR", aml_int(idx)));
+
+    fdi = aml_package(16);
+    aml_append(fdi, aml_int(idx));  /* Drive Number */
+    aml_append(fdi,
+        aml_int(cmos_get_fd_drive_type(type)));  /* Device Type */
+    /*
+     * the values below are the limits of the drive, and are thus independent
+     * of the inserted media
+     */
+    aml_append(fdi, aml_int(maxc));  /* Maximum Cylinder Number */
+    aml_append(fdi, aml_int(maxs));  /* Maximum Sector Number */
+    aml_append(fdi, aml_int(maxh));  /* Maximum Head Number */
+    /*
+     * SeaBIOS returns the below values for int 0x13 func 0x08 regardless of
+     * the drive type, so shall we
+     */
+    aml_append(fdi, aml_int(0xAF));  /* disk_specify_1 */
+    aml_append(fdi, aml_int(0x02));  /* disk_specify_2 */
+    aml_append(fdi, aml_int(0x25));  /* disk_motor_wait */
+    aml_append(fdi, aml_int(0x02));  /* disk_sector_siz */
+    aml_append(fdi, aml_int(0x12));  /* disk_eot */
+    aml_append(fdi, aml_int(0x1B));  /* disk_rw_gap */
+    aml_append(fdi, aml_int(0xFF));  /* disk_dtl */
+    aml_append(fdi, aml_int(0x6C));  /* disk_formt_gap */
+    aml_append(fdi, aml_int(0xF6));  /* disk_fill */
+    aml_append(fdi, aml_int(0x0F));  /* disk_head_sttl */
+    aml_append(fdi, aml_int(0x08));  /* disk_motor_strt */
+
+    aml_append(dev, aml_name_decl("_FDI", fdi));
+    return dev;
+}
+
+static void fdc_isa_build_aml(ISADevice *isadev, Aml *scope)
+{
+    Aml *dev;
+    Aml *crs;
+    int i;
+
+#define ACPI_FDE_MAX_FD 4
+    uint32_t fde_buf[5] = {
+        0, 0, 0, 0,     /* presence of floppy drives #0 - #3 */
+        cpu_to_le32(2)  /* tape presence (2 == never present) */
+    };
+
+    crs = aml_resource_template();
+    aml_append(crs, aml_io(AML_DECODE16, 0x03F2, 0x03F2, 0x00, 0x04));
+    aml_append(crs, aml_io(AML_DECODE16, 0x03F7, 0x03F7, 0x00, 0x01));
+    aml_append(crs, aml_irq_no_flags(6));
+    aml_append(crs,
+        aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2));
+
+    dev = aml_device("FDC0");
+    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700")));
+    aml_append(dev, aml_name_decl("_CRS", crs));
+
+    for (i = 0; i < MIN(MAX_FD, ACPI_FDE_MAX_FD); i++) {
+        FloppyDriveType type = isa_fdc_get_drive_type(isadev, i);
+
+        if (type < FLOPPY_DRIVE_TYPE_NONE) {
+            fde_buf[i] = cpu_to_le32(1);  /* drive present */
+            aml_append(dev, build_fdinfo_aml(i, type));
+        }
+    }
+    aml_append(dev, aml_name_decl("_FDE",
+               aml_buffer(sizeof(fde_buf), (uint8_t *)fde_buf)));
+
+    aml_append(scope, dev);
+}
+
  static const VMStateDescription vmstate_isa_fdc ={
      .name = "fdc",
      .version_id = 2,
@@ -2798,11 +2879,13 @@ static Property isa_fdc_properties[] = {
  static void isabus_fdc_class_init(ObjectClass *klass, void *data)
  {
      DeviceClass *dc = DEVICE_CLASS(klass);
+    ISADeviceClass *isa = ISA_DEVICE_CLASS(klass);
dc->realize = isabus_fdc_realize; 
      dc->fw_name = "fdc";
      dc->reset = fdctrl_external_reset_isa;
      dc->vmsd = &vmstate_isa_fdc;
+    isa->build_aml = fdc_isa_build_aml;
      device_class_set_props(dc, isa_fdc_properties);
      set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
  }
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 443db94deb5b..775936e28b9a 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1058,85 +1058,6 @@ static void build_hpet_aml(Aml *table)
      aml_append(table, scope);
  }
-static Aml *build_fdinfo_aml(int idx, FloppyDriveType type) 
-{
-    Aml *dev, *fdi;
-    uint8_t maxc, maxh, maxs;
-
-    isa_fdc_get_drive_max_chs(type, &maxc, &maxh, &maxs);
-
-    dev = aml_device("FLP%c", 'A' + idx);
-
-    aml_append(dev, aml_name_decl("_ADR", aml_int(idx)));
-
-    fdi = aml_package(16);
-    aml_append(fdi, aml_int(idx));  /* Drive Number */
-    aml_append(fdi,
-        aml_int(cmos_get_fd_drive_type(type)));  /* Device Type */
-    /*
-     * the values below are the limits of the drive, and are thus independent
-     * of the inserted media
-     */
-    aml_append(fdi, aml_int(maxc));  /* Maximum Cylinder Number */
-    aml_append(fdi, aml_int(maxs));  /* Maximum Sector Number */
-    aml_append(fdi, aml_int(maxh));  /* Maximum Head Number */
-    /*
-     * SeaBIOS returns the below values for int 0x13 func 0x08 regardless of
-     * the drive type, so shall we
-     */
-    aml_append(fdi, aml_int(0xAF));  /* disk_specify_1 */
-    aml_append(fdi, aml_int(0x02));  /* disk_specify_2 */
-    aml_append(fdi, aml_int(0x25));  /* disk_motor_wait */
-    aml_append(fdi, aml_int(0x02));  /* disk_sector_siz */
-    aml_append(fdi, aml_int(0x12));  /* disk_eot */
-    aml_append(fdi, aml_int(0x1B));  /* disk_rw_gap */
-    aml_append(fdi, aml_int(0xFF));  /* disk_dtl */
-    aml_append(fdi, aml_int(0x6C));  /* disk_formt_gap */
-    aml_append(fdi, aml_int(0xF6));  /* disk_fill */
-    aml_append(fdi, aml_int(0x0F));  /* disk_head_sttl */
-    aml_append(fdi, aml_int(0x08));  /* disk_motor_strt */
-
-    aml_append(dev, aml_name_decl("_FDI", fdi));
-    return dev;
-}
-
-static Aml *build_fdc_device_aml(ISADevice *fdc)
-{
-    int i;
-    Aml *dev;
-    Aml *crs;
-
-#define ACPI_FDE_MAX_FD 4
-    uint32_t fde_buf[5] = {
-        0, 0, 0, 0,     /* presence of floppy drives #0 - #3 */
-        cpu_to_le32(2)  /* tape presence (2 == never present) */
-    };
-
-    dev = aml_device("FDC0");
-    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700")));
-
-    crs = aml_resource_template();
-    aml_append(crs, aml_io(AML_DECODE16, 0x03F2, 0x03F2, 0x00, 0x04));
-    aml_append(crs, aml_io(AML_DECODE16, 0x03F7, 0x03F7, 0x00, 0x01));
-    aml_append(crs, aml_irq_no_flags(6));
-    aml_append(crs,
-        aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2));
-    aml_append(dev, aml_name_decl("_CRS", crs));
-
-    for (i = 0; i < MIN(MAX_FD, ACPI_FDE_MAX_FD); i++) {
-        FloppyDriveType type = isa_fdc_get_drive_type(fdc, i);
-
-        if (type < FLOPPY_DRIVE_TYPE_NONE) {
-            fde_buf[i] = cpu_to_le32(1);  /* drive present */
-            aml_append(dev, build_fdinfo_aml(i, type));
-        }
-    }
-    aml_append(dev, aml_name_decl("_FDE",
-               aml_buffer(sizeof(fde_buf), (uint8_t *)fde_buf)));
-
-    return dev;
-}
-
  static Aml *build_kbd_device_aml(void)
  {
      Aml *dev;
@@ -1175,7 +1096,6 @@ static Aml *build_mouse_device_aml(void)
static void build_isa_devices_aml(Aml *table) 
  {
-    ISADevice *fdc = pc_find_fdc0();
      bool ambiguous;
Aml *scope = aml_scope("_SB.PCI0.ISA"); 
@@ -1183,9 +1103,6 @@ static void build_isa_devices_aml(Aml *table)
aml_append(scope, build_kbd_device_aml()); 
      aml_append(scope, build_mouse_device_aml());
-    if (fdc) {
-        aml_append(scope, build_fdc_device_aml(fdc));
-    }
if (ambiguous) { 
          error_report("Multiple ISA busses, unable to define IPMI ACPI data");
diff --git a/stubs/cmos.c b/stubs/cmos.c
new file mode 100644
index 000000000000..416cbe4055ff
--- /dev/null
+++ b/stubs/cmos.c
@@ -0,0 +1,7 @@
+#include "qemu/osdep.h"
+#include "hw/i386/pc.h"
+
+int cmos_get_fd_drive_type(FloppyDriveType fd0)
+{
+    return 0;
+}
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index 45be5dc0ed78..3cbe472d1c6c 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -3,6 +3,7 @@ stub-obj-y += bdrv-next-monitor-owned.o
  stub-obj-y += blk-commit-all.o
  stub-obj-y += blockdev-close-all-bdrv-states.o
  stub-obj-y += clock-warp.o
+stub-obj-y += cmos.o
  stub-obj-y += cpu-get-clock.o
  stub-obj-y += cpu-get-icount.o
  stub-obj-y += dump.o
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