patch-2.4.22 linux-2.4.22/drivers/sgi/char/graphics.c

• 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(&current->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(&current->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