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authorDavid S. Miller <davem@davemloft.net>2020-09-23 02:45:34 +0300
committerDavid S. Miller <davem@davemloft.net>2020-09-23 02:45:34 +0300
commit3ab0a7a0c349a1d7beb2bb371a62669d1528269d (patch)
treed2ae17c3bfc829ce0c747ad97021cd4bc8fb11dc /drivers/video/console/vgacon.c
parent92ec804f3dbf0d986f8e10850bfff14f316d7aaf (diff)
parent805c6d3c19210c90c109107d189744e960eae025 (diff)
downloadlinux-3ab0a7a0c349a1d7beb2bb371a62669d1528269d.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Two minor conflicts: 1) net/ipv4/route.c, adding a new local variable while moving another local variable and removing it's initial assignment. 2) drivers/net/dsa/microchip/ksz9477.c, overlapping changes. One pretty prints the port mode differently, whilst another changes the driver to try and obtain the port mode from the port node rather than the switch node. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/video/console/vgacon.c')
-rw-r--r--drivers/video/console/vgacon.c221
1 files changed, 1 insertions, 220 deletions
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
index a52bb3740073..17876f0179b5 100644
--- a/drivers/video/console/vgacon.c
+++ b/drivers/video/console/vgacon.c
@@ -165,214 +165,6 @@ static inline void vga_set_mem_top(struct vc_data *c)
write_vga(12, (c->vc_visible_origin - vga_vram_base) / 2);
}
-#ifdef CONFIG_VGACON_SOFT_SCROLLBACK
-/* software scrollback */
-struct vgacon_scrollback_info {
- void *data;
- int tail;
- int size;
- int rows;
- int cnt;
- int cur;
- int save;
- int restore;
-};
-
-static struct vgacon_scrollback_info *vgacon_scrollback_cur;
-static struct vgacon_scrollback_info vgacon_scrollbacks[MAX_NR_CONSOLES];
-static bool scrollback_persistent = \
- IS_ENABLED(CONFIG_VGACON_SOFT_SCROLLBACK_PERSISTENT_ENABLE_BY_DEFAULT);
-module_param_named(scrollback_persistent, scrollback_persistent, bool, 0000);
-MODULE_PARM_DESC(scrollback_persistent, "Enable persistent scrollback for all vga consoles");
-
-static void vgacon_scrollback_reset(int vc_num, size_t reset_size)
-{
- struct vgacon_scrollback_info *scrollback = &vgacon_scrollbacks[vc_num];
-
- if (scrollback->data && reset_size > 0)
- memset(scrollback->data, 0, reset_size);
-
- scrollback->cnt = 0;
- scrollback->tail = 0;
- scrollback->cur = 0;
-}
-
-static void vgacon_scrollback_init(int vc_num)
-{
- int pitch = vga_video_num_columns * 2;
- size_t size = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024;
- int rows = size / pitch;
- void *data;
-
- data = kmalloc_array(CONFIG_VGACON_SOFT_SCROLLBACK_SIZE, 1024,
- GFP_NOWAIT);
-
- vgacon_scrollbacks[vc_num].data = data;
- vgacon_scrollback_cur = &vgacon_scrollbacks[vc_num];
-
- vgacon_scrollback_cur->rows = rows - 1;
- vgacon_scrollback_cur->size = rows * pitch;
-
- vgacon_scrollback_reset(vc_num, size);
-}
-
-static void vgacon_scrollback_switch(int vc_num)
-{
- if (!scrollback_persistent)
- vc_num = 0;
-
- if (!vgacon_scrollbacks[vc_num].data) {
- vgacon_scrollback_init(vc_num);
- } else {
- if (scrollback_persistent) {
- vgacon_scrollback_cur = &vgacon_scrollbacks[vc_num];
- } else {
- size_t size = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024;
-
- vgacon_scrollback_reset(vc_num, size);
- }
- }
-}
-
-static void vgacon_scrollback_startup(void)
-{
- vgacon_scrollback_cur = &vgacon_scrollbacks[0];
- vgacon_scrollback_init(0);
-}
-
-static void vgacon_scrollback_update(struct vc_data *c, int t, int count)
-{
- void *p;
-
- if (!vgacon_scrollback_cur->data || !vgacon_scrollback_cur->size ||
- c->vc_num != fg_console)
- return;
-
- p = (void *) (c->vc_origin + t * c->vc_size_row);
-
- while (count--) {
- if ((vgacon_scrollback_cur->tail + c->vc_size_row) >
- vgacon_scrollback_cur->size)
- vgacon_scrollback_cur->tail = 0;
-
- scr_memcpyw(vgacon_scrollback_cur->data +
- vgacon_scrollback_cur->tail,
- p, c->vc_size_row);
-
- vgacon_scrollback_cur->cnt++;
- p += c->vc_size_row;
- vgacon_scrollback_cur->tail += c->vc_size_row;
-
- if (vgacon_scrollback_cur->tail >= vgacon_scrollback_cur->size)
- vgacon_scrollback_cur->tail = 0;
-
- if (vgacon_scrollback_cur->cnt > vgacon_scrollback_cur->rows)
- vgacon_scrollback_cur->cnt = vgacon_scrollback_cur->rows;
-
- vgacon_scrollback_cur->cur = vgacon_scrollback_cur->cnt;
- }
-}
-
-static void vgacon_restore_screen(struct vc_data *c)
-{
- c->vc_origin = c->vc_visible_origin;
- vgacon_scrollback_cur->save = 0;
-
- if (!vga_is_gfx && !vgacon_scrollback_cur->restore) {
- scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf,
- c->vc_screenbuf_size > vga_vram_size ?
- vga_vram_size : c->vc_screenbuf_size);
- vgacon_scrollback_cur->restore = 1;
- vgacon_scrollback_cur->cur = vgacon_scrollback_cur->cnt;
- }
-}
-
-static void vgacon_scrolldelta(struct vc_data *c, int lines)
-{
- int start, end, count, soff;
-
- if (!lines) {
- vgacon_restore_screen(c);
- return;
- }
-
- if (!vgacon_scrollback_cur->data)
- return;
-
- if (!vgacon_scrollback_cur->save) {
- vgacon_cursor(c, CM_ERASE);
- vgacon_save_screen(c);
- c->vc_origin = (unsigned long)c->vc_screenbuf;
- vgacon_scrollback_cur->save = 1;
- }
-
- vgacon_scrollback_cur->restore = 0;
- start = vgacon_scrollback_cur->cur + lines;
- end = start + abs(lines);
-
- if (start < 0)
- start = 0;
-
- if (start > vgacon_scrollback_cur->cnt)
- start = vgacon_scrollback_cur->cnt;
-
- if (end < 0)
- end = 0;
-
- if (end > vgacon_scrollback_cur->cnt)
- end = vgacon_scrollback_cur->cnt;
-
- vgacon_scrollback_cur->cur = start;
- count = end - start;
- soff = vgacon_scrollback_cur->tail -
- ((vgacon_scrollback_cur->cnt - end) * c->vc_size_row);
- soff -= count * c->vc_size_row;
-
- if (soff < 0)
- soff += vgacon_scrollback_cur->size;
-
- count = vgacon_scrollback_cur->cnt - start;
-
- if (count > c->vc_rows)
- count = c->vc_rows;
-
- if (count) {
- int copysize;
-
- int diff = c->vc_rows - count;
- void *d = (void *) c->vc_visible_origin;
- void *s = (void *) c->vc_screenbuf;
-
- count *= c->vc_size_row;
- /* how much memory to end of buffer left? */
- copysize = min(count, vgacon_scrollback_cur->size - soff);
- scr_memcpyw(d, vgacon_scrollback_cur->data + soff, copysize);
- d += copysize;
- count -= copysize;
-
- if (count) {
- scr_memcpyw(d, vgacon_scrollback_cur->data, count);
- d += count;
- }
-
- if (diff)
- scr_memcpyw(d, s, diff * c->vc_size_row);
- } else
- vgacon_cursor(c, CM_MOVE);
-}
-
-static void vgacon_flush_scrollback(struct vc_data *c)
-{
- size_t size = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024;
-
- vgacon_scrollback_reset(c->vc_num, size);
-}
-#else
-#define vgacon_scrollback_startup(...) do { } while (0)
-#define vgacon_scrollback_init(...) do { } while (0)
-#define vgacon_scrollback_update(...) do { } while (0)
-#define vgacon_scrollback_switch(...) do { } while (0)
-
static void vgacon_restore_screen(struct vc_data *c)
{
if (c->vc_origin != c->vc_visible_origin)
@@ -386,11 +178,6 @@ static void vgacon_scrolldelta(struct vc_data *c, int lines)
vga_set_mem_top(c);
}
-static void vgacon_flush_scrollback(struct vc_data *c)
-{
-}
-#endif /* CONFIG_VGACON_SOFT_SCROLLBACK */
-
static const char *vgacon_startup(void)
{
const char *display_desc = NULL;
@@ -573,10 +360,7 @@ static const char *vgacon_startup(void)
vgacon_xres = screen_info.orig_video_cols * VGA_FONTWIDTH;
vgacon_yres = vga_scan_lines;
- if (!vga_init_done) {
- vgacon_scrollback_startup();
- vga_init_done = true;
- }
+ vga_init_done = true;
return display_desc;
}
@@ -869,7 +653,6 @@ static int vgacon_switch(struct vc_data *c)
vgacon_doresize(c, c->vc_cols, c->vc_rows);
}
- vgacon_scrollback_switch(c->vc_num);
return 0; /* Redrawing not needed */
}
@@ -1386,7 +1169,6 @@ static bool vgacon_scroll(struct vc_data *c, unsigned int t, unsigned int b,
oldo = c->vc_origin;
delta = lines * c->vc_size_row;
if (dir == SM_UP) {
- vgacon_scrollback_update(c, t, lines);
if (c->vc_scr_end + delta >= vga_vram_end) {
scr_memcpyw((u16 *) vga_vram_base,
(u16 *) (oldo + delta),
@@ -1450,7 +1232,6 @@ const struct consw vga_con = {
.con_save_screen = vgacon_save_screen,
.con_build_attr = vgacon_build_attr,
.con_invert_region = vgacon_invert_region,
- .con_flush_scrollback = vgacon_flush_scrollback,
};
EXPORT_SYMBOL(vga_con);