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xemu/hw/syborg_fb.c
Gerd Hoffmann 81a322d4a1 qdev: add return value to init() callbacks. 
Sorry folks, but it has to be.  One more of these invasive qdev patches.

We have a serious design bug in the qdev interface:  device init
callbacks can't signal failure because the init() callback has no
return value.  This patch fixes it.

We have already one case in-tree where this is needed:
Try -device virtio-blk-pci (without drive= specified) and watch qemu
segfault.  This patch fixes it.

With usb+scsi being converted to qdev we'll get more devices where the
init callback can fail for various reasons.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-08-27 20:43:28 -05:00

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/*
* Syborg Framebuffer
*
* Copyright (c) 2009 CodeSourcery
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "sysbus.h"
#include "console.h"
#include "syborg.h"
#include "framebuffer.h"
//#define DEBUG_SYBORG_FB
#ifdef DEBUG_SYBORG_FB
#define DPRINTF(fmt, ...) \
do { printf("syborg_fb: " fmt , ## __VA_ARGS__); } while (0)
#define BADF(fmt, ...) \
do { fprintf(stderr, "syborg_fb: error: " fmt , ## __VA_ARGS__); \
exit(1);} while (0)
#else
#define DPRINTF(fmt, ...) do {} while(0)
#define BADF(fmt, ...) \
do { fprintf(stderr, "syborg_fb: error: " fmt , ## __VA_ARGS__);} while (0)
#endif
enum {
FB_ID = 0,
FB_BASE = 1,
FB_HEIGHT = 2,
FB_WIDTH = 3,
FB_ORIENTATION = 4,
FB_BLANK = 5,
FB_INT_MASK = 6,
FB_INTERRUPT_CAUSE = 7,
FB_BPP = 8,
FB_COLOR_ORDER = 9,
FB_BYTE_ORDER = 10,
FB_PIXEL_ORDER = 11,
FB_ROW_PITCH = 12,
FB_ENABLED = 13,
FB_PALETTE_START = 0x400 >> 2,
FB_PALETTE_END = FB_PALETTE_START+256-1,
};
#define FB_INT_VSYNC (1U << 0)
#define FB_INT_BASE_UPDATE_DONE (1U << 1)
typedef struct {
SysBusDevice busdev;
DisplayState *ds;
/*QEMUConsole *console;*/
uint32_t need_update : 1;
uint32_t need_int : 1;
uint32_t enabled : 1;
uint32_t int_status;
uint32_t int_enable;
qemu_irq irq;
uint32_t base;
uint32_t pitch;
uint32_t rows;
uint32_t cols;
int blank;
int bpp;
int rgb; /* 0 = BGR, 1 = RGB */
int endian; /* 0 = Little, 1 = Big */
uint32_t raw_palette[256];
uint32_t palette[256];
} SyborgFBState;
enum {
BPP_SRC_1,
BPP_SRC_2,
BPP_SRC_4,
BPP_SRC_8,
BPP_SRC_16,
BPP_SRC_32,
/* TODO: Implement these. */
BPP_SRC_15 = -1,
BPP_SRC_24 = -2
};
#include "pixel_ops.h"
#define BITS 8
#include "pl110_template.h"
#define BITS 15
#include "pl110_template.h"
#define BITS 16
#include "pl110_template.h"
#define BITS 24
#include "pl110_template.h"
#define BITS 32
#include "pl110_template.h"
/* Update interrupts. */
static void syborg_fb_update(SyborgFBState *s)
{
if ((s->int_status & s->int_enable) != 0) {
DPRINTF("Raise IRQ\n");
qemu_irq_raise(s->irq);
} else {
DPRINTF("Lower IRQ\n");
qemu_irq_lower(s->irq);
}
}
static int syborg_fb_enabled(const SyborgFBState *s)
{
return s->enabled;
}
static void syborg_fb_update_palette(SyborgFBState *s)
{
int n, i;
uint32_t raw;
unsigned int r, g, b;
switch (s->bpp) {
case BPP_SRC_1: n = 2; break;
case BPP_SRC_2: n = 4; break;
case BPP_SRC_4: n = 16; break;
case BPP_SRC_8: n = 256; break;
default: return;
}
for (i = 0; i < n; i++) {
raw = s->raw_palette[i];
r = (raw >> 16) & 0xff;
g = (raw >> 8) & 0xff;
b = raw & 0xff;
switch (ds_get_bits_per_pixel(s->ds)) {
case 8:
s->palette[i] = rgb_to_pixel8(r, g, b);
break;
case 15:
s->palette[i] = rgb_to_pixel15(r, g, b);
break;
case 16:
s->palette[i] = rgb_to_pixel16(r, g, b);
break;
case 24:
case 32:
s->palette[i] = rgb_to_pixel32(r, g, b);
break;
default:
abort();
}
}
}
static void syborg_fb_update_display(void *opaque)
{
SyborgFBState *s = (SyborgFBState *)opaque;
drawfn* fntable;
drawfn fn;
int dest_width;
int src_width;
int bpp_offset;
int first;
int last;
if (!syborg_fb_enabled(s))
return;
switch (ds_get_bits_per_pixel(s->ds)) {
case 0:
return;
case 8:
fntable = pl110_draw_fn_8;
dest_width = 1;
break;
case 15:
fntable = pl110_draw_fn_15;
dest_width = 2;
break;
case 16:
fntable = pl110_draw_fn_16;
dest_width = 2;
break;
case 24:
fntable = pl110_draw_fn_24;
dest_width = 3;
break;
case 32:
fntable = pl110_draw_fn_32;
dest_width = 4;
break;
default:
fprintf(stderr, "syborg_fb: Bad color depth\n");
exit(1);
}
if (s->need_int) {
s->int_status |= FB_INT_BASE_UPDATE_DONE;
syborg_fb_update(s);
s->need_int = 0;
}
if (s->rgb) {
bpp_offset = 18;
} else {
bpp_offset = 0;
}
if (s->endian) {
bpp_offset += 6;
}
fn = fntable[s->bpp + bpp_offset];
if (s->pitch) {
src_width = s->pitch;
} else {
src_width = s->cols;
switch (s->bpp) {
case BPP_SRC_1:
src_width >>= 3;
break;
case BPP_SRC_2:
src_width >>= 2;
break;
case BPP_SRC_4:
src_width >>= 1;
break;
case BPP_SRC_8:
break;
case BPP_SRC_15:
case BPP_SRC_16:
src_width <<= 1;
break;
case BPP_SRC_24:
src_width *= 3;
break;
case BPP_SRC_32:
src_width <<= 2;
break;
}
}
dest_width *= s->cols;
first = 0;
/* TODO: Implement blanking. */
if (!s->blank) {
if (s->need_update && s->bpp <= BPP_SRC_8) {
syborg_fb_update_palette(s);
}
framebuffer_update_display(s->ds,
s->base, s->cols, s->rows,
src_width, dest_width, 0,
s->need_update,
fn, s->palette,
&first, &last);
if (first >= 0) {
dpy_update(s->ds, 0, first, s->cols, last - first + 1);
}
s->int_status |= FB_INT_VSYNC;
syborg_fb_update(s);
}
s->need_update = 0;
}
static void syborg_fb_invalidate_display(void * opaque)
{
SyborgFBState *s = (SyborgFBState *)opaque;
s->need_update = 1;
}
static uint32_t syborg_fb_read(void *opaque, target_phys_addr_t offset)
{
SyborgFBState *s = opaque;
DPRINTF("read reg %d\n", (int)offset);
offset &= 0xfff;
switch (offset >> 2) {
case FB_ID:
return SYBORG_ID_FRAMEBUFFER;
case FB_BASE:
return s->base;
case FB_HEIGHT:
return s->rows;
case FB_WIDTH:
return s->cols;
case FB_ORIENTATION:
return 0;
case FB_BLANK:
return s->blank;
case FB_INT_MASK:
return s->int_enable;
case FB_INTERRUPT_CAUSE:
return s->int_status;
case FB_BPP:
switch (s->bpp) {
case BPP_SRC_1: return 1;
case BPP_SRC_2: return 2;
case BPP_SRC_4: return 4;
case BPP_SRC_8: return 8;
case BPP_SRC_15: return 15;
case BPP_SRC_16: return 16;
case BPP_SRC_24: return 24;
case BPP_SRC_32: return 32;
default: return 0;
}
case FB_COLOR_ORDER:
return s->rgb;
case FB_BYTE_ORDER:
return s->endian;
case FB_PIXEL_ORDER:
return 0;
case FB_ROW_PITCH:
return s->pitch;
case FB_ENABLED:
return s->enabled;
default:
if ((offset >> 2) >= FB_PALETTE_START
&& (offset >> 2) <= FB_PALETTE_END) {
return s->raw_palette[(offset >> 2) - FB_PALETTE_START];
} else {
cpu_abort (cpu_single_env, "syborg_fb_read: Bad offset %x\n",
(int)offset);
}
return 0;
}
}
static void syborg_fb_write(void *opaque, target_phys_addr_t offset,
uint32_t val)
{
SyborgFBState *s = opaque;
DPRINTF("write reg %d = %d\n", (int)offset, val);
s->need_update = 1;
offset &= 0xfff;
switch (offset >> 2) {
case FB_BASE:
s->base = val;
s->need_int = 1;
s->need_update = 1;
syborg_fb_update(s);
break;
case FB_HEIGHT:
s->rows = val;
break;
case FB_WIDTH:
s->cols = val;
break;
case FB_ORIENTATION:
/* TODO: Implement rotation. */
break;
case FB_BLANK:
s->blank = val & 1;
break;
case FB_INT_MASK:
s->int_enable = val;
syborg_fb_update(s);
break;
case FB_INTERRUPT_CAUSE:
s->int_status &= ~val;
syborg_fb_update(s);
break;
case FB_BPP:
switch (val) {
case 1: val = BPP_SRC_1; break;
case 2: val = BPP_SRC_2; break;
case 4: val = BPP_SRC_4; break;
case 8: val = BPP_SRC_8; break;
/* case 15: val = BPP_SRC_15; break; */
case 16: val = BPP_SRC_16; break;
/* case 24: val = BPP_SRC_24; break; */
case 32: val = BPP_SRC_32; break;
default: val = s->bpp; break;
}
s->bpp = val;
break;
case FB_COLOR_ORDER:
s->rgb = (val != 0);
break;
case FB_BYTE_ORDER:
s->endian = (val != 0);
break;
case FB_PIXEL_ORDER:
/* TODO: Implement this. */
break;
case FB_ROW_PITCH:
s->pitch = val;
break;
case FB_ENABLED:
s->enabled = val;
break;
default:
if ((offset >> 2) >= FB_PALETTE_START
&& (offset >> 2) <= FB_PALETTE_END) {
s->raw_palette[(offset >> 2) - FB_PALETTE_START] = val;
} else {
cpu_abort (cpu_single_env, "syborg_fb_write: Bad offset %x\n",
(int)offset);
}
break;
}
}
static CPUReadMemoryFunc * const syborg_fb_readfn[] = {
syborg_fb_read,
syborg_fb_read,
syborg_fb_read
};
static CPUWriteMemoryFunc * const syborg_fb_writefn[] = {
syborg_fb_write,
syborg_fb_write,
syborg_fb_write
};
static void syborg_fb_save(QEMUFile *f, void *opaque)
{
SyborgFBState *s = opaque;
int i;
qemu_put_be32(f, s->need_int);
qemu_put_be32(f, s->int_status);
qemu_put_be32(f, s->int_enable);
qemu_put_be32(f, s->enabled);
qemu_put_be32(f, s->base);
qemu_put_be32(f, s->pitch);
qemu_put_be32(f, s->rows);
qemu_put_be32(f, s->cols);
qemu_put_be32(f, s->bpp);
qemu_put_be32(f, s->rgb);
for (i = 0; i < 256; i++) {
qemu_put_be32(f, s->raw_palette[i]);
}
}
static int syborg_fb_load(QEMUFile *f, void *opaque, int version_id)
{
SyborgFBState *s = opaque;
int i;
if (version_id != 1)
return -EINVAL;
s->need_int = qemu_get_be32(f);
s->int_status = qemu_get_be32(f);
s->int_enable = qemu_get_be32(f);
s->enabled = qemu_get_be32(f);
s->base = qemu_get_be32(f);
s->pitch = qemu_get_be32(f);
s->rows = qemu_get_be32(f);
s->cols = qemu_get_be32(f);
s->bpp = qemu_get_be32(f);
s->rgb = qemu_get_be32(f);
for (i = 0; i < 256; i++) {
s->raw_palette[i] = qemu_get_be32(f);
}
s->need_update = 1;
return 0;
}
static int syborg_fb_init(SysBusDevice *dev)
{
SyborgFBState *s = FROM_SYSBUS(SyborgFBState, dev);
int iomemtype;
sysbus_init_irq(dev, &s->irq);
iomemtype = cpu_register_io_memory(syborg_fb_readfn,
syborg_fb_writefn, s);
sysbus_init_mmio(dev, 0x1000, iomemtype);
s->ds = graphic_console_init(syborg_fb_update_display,
syborg_fb_invalidate_display,
NULL, NULL, s);
if (s->cols != 0 && s->rows != 0) {
qemu_console_resize(s->ds, s->cols, s->rows);
}
if (!s->cols)
s->cols = ds_get_width(s->ds);
if (!s->rows)
s->rows = ds_get_height(s->ds);
register_savevm("syborg_framebuffer", -1, 1,
syborg_fb_save, syborg_fb_load, s);
return 0;
}
static SysBusDeviceInfo syborg_fb_info = {
.init = syborg_fb_init,
.qdev.name = "syborg,framebuffer",
.qdev.size = sizeof(SyborgFBState),
.qdev.props = (Property[]) {
DEFINE_PROP_UINT32("width", SyborgFBState, cols, 0),
DEFINE_PROP_UINT32("height", SyborgFBState, rows, 0),
DEFINE_PROP_END_OF_LIST(),
}
};
static void syborg_fb_register_devices(void)
{
sysbus_register_withprop(&syborg_fb_info);
}
device_init(syborg_fb_register_devices)
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