patch-2.4.22 linux-2.4.22/drivers/sgi/char/graphics.c
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- Lines: 377
- Date:
1969-12-31 16:00:00.000000000 -0800
- Orig file:
linux-2.4.21/drivers/sgi/char/graphics.c
- Orig date:
2002-11-28 15:53:14.000000000 -0800
diff -urN linux-2.4.21/drivers/sgi/char/graphics.c linux-2.4.22/drivers/sgi/char/graphics.c
@@ -1,376 +0,0 @@
-/*
- * gfx.c: support for SGI's /dev/graphics, /dev/opengl
- *
- * Author: Miguel de Icaza (miguel@nuclecu.unam.mx)
- * Ralf Baechle (ralf@gnu.org)
- * Ulf Carlsson (ulfc@bun.falkenberg.se)
- *
- * On IRIX, /dev/graphics is [10, 146]
- * /dev/opengl is [10, 147]
- *
- * From a mail with Mark J. Kilgard, /dev/opengl and /dev/graphics are
- * the same thing, the use of /dev/graphics seems deprecated though.
- *
- * The reason that the original SGI programmer had to use only one
- * device for all the graphic cards on the system will remain a
- * mistery for the rest of our lives. Why some ioctls take a board
- * number and some others not? Mistery. Why do they map the hardware
- * registers into the user address space with an ioctl instead of
- * mmap? Mistery too. Why they did not use the standard way of
- * making ioctl constants and instead sticked a random constant?
- * Mistery too.
- *
- * We implement those misterious things, and tried not to think about
- * the reasons behind them.
- */
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/miscdevice.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/mman.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/smp_lock.h>
-#include <asm/uaccess.h>
-#include "gconsole.h"
-#include "graphics.h"
-#include "usema.h"
-#include <asm/gfx.h>
-#include <asm/rrm.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <video/newport.h>
-
-#define DEBUG
-
-/* The boards */
-extern struct graphics_ops *newport_probe (int, const char **);
-
-static struct graphics_ops cards [MAXCARDS];
-static int boards;
-
-#define GRAPHICS_CARD(inode) 0
-
-/*
-void enable_gconsole(void) {};
-void disable_gconsole(void) {};
-*/
-
-
-int
-sgi_graphics_open (struct inode *inode, struct file *file)
-{
- struct newport_regs *nregs =
- (struct newport_regs *) KSEG1ADDR(cards[0].g_regs);
-
- newport_wait();
- nregs->set.wrmask = 0xffffffff;
- nregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
- NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX |
- NPORT_DMODE0_STOPY);
- nregs->set.colori = 1;
- nregs->set.xystarti = (0 << 16) | 0;
- nregs->go.xyendi = (1280 << 16) | 1024;
-
- return 0;
-}
-
-int
-sgi_graphics_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
- unsigned int board;
- unsigned int devnum = GRAPHICS_CARD (inode->i_rdev);
- int i;
-
- if ((cmd >= RRM_BASE) && (cmd <= RRM_CMD_LIMIT))
- return rrm_command (cmd-RRM_BASE, (void *) arg);
-
- switch (cmd){
- case GFX_GETNUM_BOARDS:
- return boards;
-
- case GFX_GETBOARD_INFO: {
- struct gfx_getboardinfo_args *bia = (void *) arg;
- void *dest_buf;
- int max_len;
-
- i = verify_area (VERIFY_READ, (void *) arg, sizeof (struct gfx_getboardinfo_args));
- if (i) return i;
-
- if (__get_user (board, &bia->board) ||
- __get_user (dest_buf, &bia->buf) ||
- __get_user (max_len, &bia->len))
- return -EFAULT;
-
- if (board >= boards)
- return -EINVAL;
- if (max_len < sizeof (struct gfx_getboardinfo_args))
- return -EINVAL;
- if (max_len > cards [board].g_board_info_len)
- max_len = cards [boards].g_board_info_len;
- i = verify_area (VERIFY_WRITE, dest_buf, max_len);
- if (i) return i;
- if (copy_to_user (dest_buf, cards [board].g_board_info, max_len))
- return -EFAULT;
- return max_len;
- }
-
- case GFX_ATTACH_BOARD: {
- struct gfx_attach_board_args *att = (void *) arg;
- void *vaddr;
- int r;
-
- i = verify_area (VERIFY_READ, (void *)arg, sizeof (struct gfx_attach_board_args));
- if (i) return i;
-
- if (__get_user (board, &att->board) ||
- __get_user (vaddr, &att->vaddr))
- return -EFAULT;
-
- /* Ok for now we are assuming /dev/graphicsN -> head N even
- * if the ioctl api suggests that this is not quite the case.
- *
- * Otherwise we fail, we use this assumption in the mmap code
- * below to find our board information.
- */
- if (board != devnum){
- printk ("Parameter board does not match the current board\n");
- return -EINVAL;
- }
-
- if (board >= boards)
- return -EINVAL;
-
- /* If it is the first opening it, then make it the board owner */
- if (!cards [board].g_owner)
- cards [board].g_owner = current;
-
- /*
- * Ok, we now call mmap on this file, which will end up calling
- * sgi_graphics_mmap
- */
- disable_gconsole ();
- down_write(¤t->mm->mmap_sem);
- r = do_mmap (file, (unsigned long)vaddr,
- cards[board].g_regs_size, PROT_READ|PROT_WRITE,
- MAP_FIXED|MAP_PRIVATE, 0);
- up_write(¤t->mm->mmap_sem);
- if (r)
- return r;
- }
-
- /* Strange, the real mapping seems to be done at GFX_ATTACH_BOARD,
- * GFX_MAPALL is not even used by IRIX X server
- */
- case GFX_MAPALL:
- return 0;
-
- case GFX_LABEL:
- return 0;
-
- /* Version check
- * for my IRIX 6.2 X server, this is what the kernel returns
- */
- case 1:
- return 3;
-
- /* Xsgi does not use this one, I assume minor is the board being queried */
- case GFX_IS_MANAGED:
- if (devnum > boards)
- return -EINVAL;
- return (cards [devnum].g_owner != 0);
-
- default:
- if (cards [devnum].g_ioctl)
- return (*cards [devnum].g_ioctl)(devnum, cmd, arg);
-
- }
- return -EINVAL;
-}
-
-int
-sgi_graphics_close (struct inode *inode, struct file *file)
-{
- int board = GRAPHICS_CARD (inode->i_rdev);
-
- /* Tell the rendering manager that one client is going away */
- lock_kernel();
- rrm_close (inode, file);
-
- /* Was this file handle from the board owner?, clear it */
- if (current == cards [board].g_owner){
- cards [board].g_owner = 0;
- if (cards [board].g_reset_console)
- (*cards [board].g_reset_console)();
- enable_gconsole ();
- }
- unlock_kernel();
- return 0;
-}
-
-/*
- * This is the core of the direct rendering engine.
- */
-struct page *
-sgi_graphics_nopage (struct vm_area_struct *vma, unsigned long address, int
- no_share)
-{
- pgd_t *pgd; pmd_t *pmd; pte_t *pte;
- int board = GRAPHICS_CARD (vma->vm_dentry->d_inode->i_rdev);
-
- unsigned long virt_add, phys_add;
-
-#ifdef DEBUG
- printk ("Got a page fault for board %d address=%lx guser=%lx\n", board,
- address, (unsigned long) cards[board].g_user);
-#endif
-
- /* Figure out if another process has this mapped, and revoke the mapping
- * in that case. */
- if (cards[board].g_user && cards[board].g_user != current) {
- /* FIXME: save graphics context here, dump it to rendering
- * node? */
-
- remove_mapping(cards[board].g_user, vma->vm_start, vma->vm_end);
- }
-
- cards [board].g_user = current;
-
- /* Map the physical address of the newport registers into the address
- * space of this process */
-
- virt_add = address & PAGE_MASK;
- phys_add = cards[board].g_regs + virt_add - vma->vm_start;
- remap_page_range(virt_add, phys_add, PAGE_SIZE, vma->vm_page_prot);
-
- pgd = pgd_offset(current->mm, address);
- pmd = pmd_offset(pgd, address);
- pte = pte_offset(pmd, address);
- return pte_page(*pte);
-}
-
-/*
- * We convert a GFX ioctl for mapping hardware registers, in a nice sys_mmap
- * call, which takes care of everything that must be taken care of.
- *
- */
-
-static struct vm_operations_struct graphics_mmap = {
- nopage: sgi_graphics_nopage, /* our magic no-page fault handler */
-};
-
-int
-sgi_graphics_mmap (struct file *file, struct vm_area_struct *vma)
-{
- uint size;
-
- size = vma->vm_end - vma->vm_start;
-
- /* 1. Set our special graphic virtualizer */
- vma->vm_ops = &graphics_mmap;
-
- /* 2. Set the special tlb permission bits */
- vma->vm_page_prot = PAGE_USERIO;
-
- /* final setup */
- vma->vm_file = file;
- return 0;
-}
-
-#if 0
-/* Do any post card-detection setup on graphics_ops */
-static void
-graphics_ops_post_init (int slot)
-{
- /* There is no owner for the card initially */
- cards [slot].g_owner = (struct task_struct *) 0;
- cards [slot].g_user = (struct task_struct *) 0;
-}
-#endif
-
-struct file_operations sgi_graphics_fops = {
- ioctl: sgi_graphics_ioctl,
- mmap: sgi_graphics_mmap,
- open: sgi_graphics_open,
- release: sgi_graphics_close,
-};
-
-/* /dev/graphics */
-static struct miscdevice dev_graphics = {
- SGI_GRAPHICS_MINOR, "sgi-graphics", &sgi_graphics_fops
-};
-
-/* /dev/opengl */
-static struct miscdevice dev_opengl = {
- SGI_OPENGL_MINOR, "sgi-opengl", &sgi_graphics_fops
-};
-
-/* This is called later from the misc-init routine */
-void __init gfx_register (void)
-{
- misc_register (&dev_graphics);
- misc_register (&dev_opengl);
-}
-
-void __init gfx_init (const char **name)
-{
-#if 0
- struct console_ops *console;
- struct graphics_ops *g;
-#endif
-
- printk ("GFX INIT: ");
- shmiq_init ();
- usema_init ();
-
- boards++;
-
-#if 0
- if ((g = newport_probe (boards, name)) != 0) {
- cards [boards] = *g;
- graphics_ops_post_init (boards);
- boards++;
- console = 0;
- }
- /* Add more graphic drivers here */
- /* Keep passing console around */
-#endif
-
- if (boards > MAXCARDS)
- printk (KERN_WARNING "Too many cards found on the system\n");
-}
-
-#ifdef MODULE
-MODULE_LICENSE("GPL");
-
-int init_module(void) {
- static int initiated = 0;
-
- printk("SGI Newport Graphics version %i.%i.%i\n",42,54,69);
-
- if (!initiated++) {
- shmiq_init();
- usema_init();
- printk("Adding first board\n");
- boards++;
- cards[0].g_regs = 0x1f0f0000;
- cards[0].g_regs_size = sizeof (struct newport_regs);
- }
-
- printk("Boards: %d\n", boards);
-
- misc_register (&dev_graphics);
- misc_register (&dev_opengl);
-
- return 0;
-}
-
-void cleanup_module(void) {
- printk("Shutting down SGI Newport Graphics\n");
-
- misc_deregister (&dev_graphics);
- misc_deregister (&dev_opengl);
-}
-#endif
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