/* radeon_irq.c -- IRQ handling for radeon -*- linux-c -*- */ /* * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved. * * The Weather Channel (TM) funded Tungsten Graphics to develop the * initial release of the Radeon 8500 driver under the XFree86 license. * This notice must be preserved. * * 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 (including the next * paragraph) 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 * PRECISION INSIGHT AND/OR ITS SUPPLIERS 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. * * Authors: * Keith Whitwell * Michel D�zer */ #include "drmP.h" #include "drm.h" #include "radeon_drm.h" #include "radeon_drv.h" static __inline__ u32 radeon_acknowledge_irqs(drm_radeon_private_t * dev_priv, u32 mask) { u32 irqs = RADEON_READ(RADEON_GEN_INT_STATUS) & mask; if (irqs) RADEON_WRITE(RADEON_GEN_INT_STATUS, irqs); return irqs; } /* Interrupts - Used for device synchronization and flushing in the * following circumstances: * * - Exclusive FB access with hw idle: * - Wait for GUI Idle (?) interrupt, then do normal flush. * * - Frame throttling, NV_fence: * - Drop marker irq's into command stream ahead of time. * - Wait on irq's with lock *not held* * - Check each for termination condition * * - Internally in cp_getbuffer, etc: * - as above, but wait with lock held??? * * NOTE: These functions are misleadingly named -- the irq's aren't * tied to dma at all, this is just a hangover from dri prehistory. */ irqreturn_t radeon_driver_irq_handler(DRM_IRQ_ARGS) { drm_device_t *dev = (drm_device_t *) arg; drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private; u32 stat; /* Only consider the bits we're interested in - others could be used * outside the DRM */ stat = radeon_acknowledge_irqs(dev_priv, (RADEON_SW_INT_TEST_ACK | RADEON_CRTC_VBLANK_STAT)); if (!stat) return IRQ_NONE; /* SW interrupt */ if (stat & RADEON_SW_INT_TEST) { DRM_WAKEUP(&dev_priv->swi_queue); } /* VBLANK interrupt */ if (stat & RADEON_CRTC_VBLANK_STAT) { atomic_inc(&dev->vbl_received); DRM_WAKEUP(&dev->vbl_queue); drm_vbl_send_signals(dev); } return IRQ_HANDLED; } static int radeon_emit_irq(drm_device_t * dev) { drm_radeon_private_t *dev_priv = dev->dev_private; unsigned int ret; RING_LOCALS; atomic_inc(&dev_priv->swi_emitted); ret = atomic_read(&dev_priv->swi_emitted); BEGIN_RING(4); OUT_RING_REG(RADEON_LAST_SWI_REG, ret); OUT_RING_REG(RADEON_GEN_INT_STATUS, RADEON_SW_INT_FIRE); ADVANCE_RING(); COMMIT_RING(); return ret; } static int radeon_wait_irq(drm_device_t * dev, int swi_nr) { drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private; int ret = 0; if (RADEON_READ(RADEON_LAST_SWI_REG) >= swi_nr) return 0; dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE; DRM_WAIT_ON(ret, dev_priv->swi_queue, 3 * DRM_HZ, RADEON_READ(RADEON_LAST_SWI_REG) >= swi_nr); return ret; } int radeon_driver_vblank_wait(drm_device_t * dev, unsigned int *sequence) { drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private; unsigned int cur_vblank; int ret = 0; if (!dev_priv) { DRM_ERROR("%s called with no initialization\n", __FUNCTION__); return DRM_ERR(EINVAL); } radeon_acknowledge_irqs(dev_priv, RADEON_CRTC_VBLANK_STAT); dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE; /* Assume that the user has missed the current sequence number * by about a day rather than she wants to wait for years * using vertical blanks... */ DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, (((cur_vblank = atomic_read(&dev->vbl_received)) - *sequence) <= (1 << 23))); *sequence = cur_vblank; return ret; } /* Needs the lock as it touches the ring. */ int radeon_irq_emit(DRM_IOCTL_ARGS) { DRM_DEVICE; drm_radeon_private_t *dev_priv = dev->dev_private; drm_radeon_irq_emit_t emit; int result; LOCK_TEST_WITH_RETURN(dev, filp); if (!dev_priv) { DRM_ERROR("%s called with no initialization\n", __FUNCTION__); return DRM_ERR(EINVAL); } DRM_COPY_FROM_USER_IOCTL(emit, (drm_radeon_irq_emit_t __user *) data, sizeof(emit)); result = radeon_emit_irq(dev); if (DRM_COPY_TO_USER(emit.irq_seq, &result, sizeof(int))) { DRM_ERROR("copy_to_user\n"); return DRM_ERR(EFAULT); } return 0; } /* Doesn't need the hardware lock. */ int radeon_irq_wait(DRM_IOCTL_ARGS) { DRM_DEVICE; drm_radeon_private_t *dev_priv = dev->dev_private; drm_radeon_irq_wait_t irqwait; if (!dev_priv) { DRM_ERROR("%s called with no initialization\n", __FUNCTION__); return DRM_ERR(EINVAL); } DRM_COPY_FROM_USER_IOCTL(irqwait, (drm_radeon_irq_wait_t __user *) data, sizeof(irqwait)); return radeon_wait_irq(dev, irqwait.irq_seq); } /* drm_dma.h hooks */ void radeon_driver_irq_preinstall(drm_device_t * dev) { drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private; /* Disable *all* interrupts */ RADEON_WRITE(RADEON_GEN_INT_CNTL, 0); /* Clear bits if they're already high */ radeon_acknowledge_irqs(dev_priv, (RADEON_SW_INT_TEST_ACK | RADEON_CRTC_VBLANK_STAT)); } void radeon_driver_irq_postinstall(drm_device_t * dev) { drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private; atomic_set(&dev_priv->swi_emitted, 0); DRM_INIT_WAITQUEUE(&dev_priv->swi_queue); /* Turn on SW and VBL ints */ RADEON_WRITE(RADEON_GEN_INT_CNTL, RADEON_CRTC_VBLANK_MASK | RADEON_SW_INT_ENABLE); } void radeon_driver_irq_uninstall(drm_device_t * dev) { drm_radeon_private_t *dev_priv = (drm_radeon_private_t *) dev->dev_private; if (!dev_priv) return; /* Disable *all* interrupts */ RADEON_WRITE(RADEON_GEN_INT_CNTL, 0); } 3' href='#n123'>123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 
/**
 * \file drm_memory.h
 * Memory management wrappers for DRM
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 */

/*
 * Created: Thu Feb  4 14:00:34 1999 by faith@valinux.com
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * All Rights Reserved.
 *
 * 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 (including the next
 * paragraph) 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
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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 <linux/config.h>
#include <linux/highmem.h>
#include <linux/vmalloc.h>
#include "drmP.h"

/**
 * Cut down version of drm_memory_debug.h, which used to be called
 * drm_memory.h.
 */

/* Need the 4-argument version of vmap().  */
#if __OS_HAS_AGP && defined(VMAP_4_ARGS)

#include <linux/vmalloc.h>

#ifdef HAVE_PAGE_AGP
#include <asm/agp.h>
#else
# ifdef __powerpc__
#  define PAGE_AGP	__pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE)
# else
#  define PAGE_AGP	PAGE_KERNEL
# endif
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
#ifndef pte_offset_kernel
# define pte_offset_kernel(dir, address)	pte_offset(dir, address)
#endif
#ifndef pte_pfn
# define pte_pfn(pte)				(pte_page(pte) - mem_map)
#endif
#ifndef pfn_to_page
# define pfn_to_page(pfn)			(mem_map + (pfn))
#endif
#endif

/*
 * Find the drm_map that covers the range [offset, offset+size).
 */
static inline drm_map_t *drm_lookup_map(unsigned long offset,
					unsigned long size, drm_device_t * dev)
{
	struct list_head *list;
	drm_map_list_t *r_list;
	drm_map_t *map;

	list_for_each(list, &dev->maplist->head) {
		r_list = (drm_map_list_t *) list;
		map = r_list->map;
		if (!map)
			continue;
		if (map->offset <= offset
		    && (offset + size) <= (map->offset + map->size))
			return map;
	}
	return NULL;
}

static inline void *agp_remap(unsigned long offset, unsigned long size,
			      drm_device_t * dev)
{
	unsigned long *phys_addr_map, i, num_pages =
	    PAGE_ALIGN(size) / PAGE_SIZE;
	struct drm_agp_mem *agpmem;
	struct page **page_map;
	void *addr;

	size = PAGE_ALIGN(size);

#ifdef __alpha__
	offset -= dev->hose->mem_space->start;
#endif

	for (agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next)
		if (agpmem->bound <= offset
		    && (agpmem->bound + (agpmem->pages << PAGE_SHIFT)) >=
		    (offset + size))
			break;
	if (!agpmem)
		return NULL;

	/*
	 * OK, we're mapping AGP space on a chipset/platform on which memory accesses by
	 * the CPU do not get remapped by the GART.  We fix this by using the kernel's
	 * page-table instead (that's probably faster anyhow...).
	 */
	/* note: use vmalloc() because num_pages could be large... */
	page_map = vmalloc(num_pages * sizeof(struct page *));
	if (!page_map)
		return NULL;

	phys_addr_map =
	    agpmem->memory->memory + (offset - agpmem->bound) / PAGE_SIZE;
	for (i = 0; i < num_pages; ++i)
		page_map[i] = pfn_to_page(phys_addr_map[i] >> PAGE_SHIFT);
	addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP);
	vfree(page_map);

	return addr;
}

static inline unsigned long drm_follow_page(void *vaddr)
{
	pgd_t *pgd = pgd_offset_k((unsigned long) vaddr);
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,10)
	pmd_t *pmd = pmd_offset(pgd, (unsigned long)vaddr);
#else
	pud_t *pud = pud_offset(pgd, (unsigned long) vaddr);
	pmd_t *pmd = pmd_offset(pud, (unsigned long) vaddr);
#endif
	pte_t *ptep = pte_offset_kernel(pmd, (unsigned long) vaddr);
	return pte_pfn(*ptep) << PAGE_SHIFT;
}

#else				/* __OS_HAS_AGP */

static inline drm_map_t *drm_lookup_map(unsigned long offset,
					unsigned long size, drm_device_t * dev)
{
	return NULL;
}

static inline void *agp_remap(unsigned long offset, unsigned long size,
			      drm_device_t * dev)
{
	return NULL;
}

static inline unsigned long drm_follow_page(void *vaddr)
{
	return 0;
}
#endif

#ifndef DEBUG_MEMORY
static inline void *drm_ioremap(unsigned long offset, unsigned long size,
				drm_device_t * dev)
{
#if defined(VMAP_4_ARGS)
	if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) {
		drm_map_t *map = drm_lookup_map(offset, size, dev);

		if (map && map->type == _DRM_AGP)
			return agp_remap(offset, size, dev);
	}
#endif

	return ioremap(offset, size);
}

static inline void *drm_ioremap_nocache(unsigned long offset,
					unsigned long size, drm_device_t * dev)
{
#if defined(VMAP_4_ARGS)
	if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) {
		drm_map_t *map = drm_lookup_map(offset, size, dev);

		if (map && map->type == _DRM_AGP)
			return agp_remap(offset, size, dev);
	}
#endif

	return ioremap_nocache(offset, size);
}

static inline void drm_ioremapfree(void *pt, unsigned long size,
				   drm_device_t * dev)
{
#if defined(VMAP_4_ARGS)
	/*
	 * This is a bit ugly.  It would be much cleaner if the DRM API would use separate
	 * routines for handling mappings in the AGP space.  Hopefully this can be done in
	 * a future revision of the interface...
	 */
	if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture
	    && ((unsigned long)pt >= VMALLOC_START
		&& (unsigned long)pt < VMALLOC_END)) {
		unsigned long offset;
		drm_map_t *map;

		offset = drm_follow_page(pt) | ((unsigned long)pt & ~PAGE_MASK);
		map = drm_lookup_map(offset, size, dev);
		if (map && map->type == _DRM_AGP) {
			vunmap(pt);
			return;
		}
	}
#endif
	iounmap(pt);
}
#else
extern void *drm_ioremap(unsigned long offset, unsigned long size,
				drm_device_t * dev);
extern void *drm_ioremap_nocache(unsigned long offset,
					unsigned long size, drm_device_t * dev);
extern void drm_ioremapfree(void *pt, unsigned long size,
				   drm_device_t * dev);
#endif
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