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/* savage_drv.c -- Savage driver for Linux
 *
 * Copyright 2004  Felix Kuehling
 * 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, sub license,
 * 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
 * NON-INFRINGEMENT. IN NO EVENT SHALL FELIX KUEHLING 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 "drmP.h"
#include "savage_drm.h"
#include "savage_drv.h"

#include "drm_pciids.h"

static struct pci_device_id pciidlist[] = {
	savage_PCI_IDS
};

static int probe(struct pci_dev *pdev, const struct pci_device_id *ent);
static struct drm_driver driver = {
	.driver_features =
	    DRIVER_USE_AGP | DRIVER_USE_MTRR |
	    DRIVER_HAVE_DMA | DRIVER_PCI_DMA,
	.dev_priv_size = sizeof(drm_savage_buf_priv_t),
	.load = savage_driver_load,
	.firstopen = savage_driver_firstopen,
	.lastclose = savage_driver_lastclose,
	.unload = savage_driver_unload,
	.reclaim_buffers = savage_reclaim_buffers,
	.get_map_ofs = drm_core_get_map_ofs,
	.get_reg_ofs = drm_core_get_reg_ofs,
	.ioctls = savage_ioctls,
	.dma_ioctl = savage_bci_buffers,
	.fops = {
		.owner   = THIS_MODULE,
		.open	 = drm_open,
		.release = drm_release,
		.ioctl	 = drm_ioctl,
		.mmap	 = drm_mmap,
		.poll = drm_poll,
		.fasync  = drm_fasync,
	},
	.pci_driver = {
		.name          = DRIVER_NAME,
		.id_table      = pciidlist,
		.probe         = probe,
		.remove        = __devexit_p(drm_cleanup_pci),
	},

	.name = DRIVER_NAME,
	.desc = DRIVER_DESC,
	.date = DRIVER_DATE,
	.major = DRIVER_MAJOR,
	.minor = DRIVER_MINOR,
	.patchlevel = DRIVER_PATCHLEVEL,
};

static int probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	return drm_get_dev(pdev, ent, &driver);
}

static int __init savage_init(void)
{
	driver.num_ioctls = savage_max_ioctl;
	return drm_init(&driver, pciidlist);
}

static void __exit savage_exit(void)
{
	drm_exit(&driver);
}

module_init(savage_init);
module_exit(savage_exit);

MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_LICENSE("GPL and additional rights");
t); } return 0; } } if (new == (context | _DRM_LOCK_HELD)) { /* Have lock */ return 1; } return 0; } /* This takes a lock forcibly and hands it to context. Should ONLY be used inside *_unlock to give lock to kernel before calling *_dma_schedule. */ int drm_lock_transfer(drm_device_t *dev, __volatile__ unsigned int *lock, unsigned int context) { unsigned int old, new; dev->lock.file_priv = NULL; do { old = *lock; new = context | _DRM_LOCK_HELD; } while (!atomic_cmpset_int(lock, old, new)); return 1; } int drm_lock_free(drm_device_t *dev, __volatile__ unsigned int *lock, unsigned int context) { unsigned int old, new; dev->lock.file_priv = NULL; do { old = *lock; new = 0; } while (!atomic_cmpset_int(lock, old, new)); if (_DRM_LOCK_IS_HELD(old) && _DRM_LOCKING_CONTEXT(old) != context) { DRM_ERROR("%d freed heavyweight lock held by %d\n", context, _DRM_LOCKING_CONTEXT(old)); return 1; } DRM_WAKEUP_INT((void *)&dev->lock.lock_queue); return 0; } int drm_lock(drm_device_t *dev, void *data, struct drm_file *file_priv) { drm_lock_t *lock = data; int ret = 0; if (lock->context == DRM_KERNEL_CONTEXT) { DRM_ERROR("Process %d using kernel context %d\n", DRM_CURRENTPID, lock->context); return EINVAL; } DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n", lock->context, DRM_CURRENTPID, dev->lock.hw_lock->lock, lock->flags); if (dev->driver.use_dma_queue && lock->context < 0) return EINVAL; DRM_LOCK(); for (;;) { if (drm_lock_take(&dev->lock.hw_lock->lock, lock->context)) { dev->lock.file_priv = file_priv; dev->lock.lock_time = jiffies; atomic_inc(&dev->counts[_DRM_STAT_LOCKS]); break; /* Got lock */ } /* Contention */ #if defined(__FreeBSD__) && __FreeBSD_version > 500000 ret = mtx_sleep((void *)&dev->lock.lock_queue, &dev->dev_lock, PZERO | PCATCH, "drmlk2", 0); #else ret = tsleep((void *)&dev->lock.lock_queue, PZERO | PCATCH, "drmlk2", 0); #endif if (ret != 0) break; } DRM_UNLOCK(); DRM_DEBUG("%d %s\n", lock->context, ret ? "interrupted" : "has lock"); if (ret != 0) return ret; /* XXX: Add signal blocking here */ if (dev->driver.dma_quiescent != NULL && (lock->flags & _DRM_LOCK_QUIESCENT)) dev->driver.dma_quiescent(dev); return 0; } int drm_unlock(drm_device_t *dev, void *data, struct drm_file *file_priv) { drm_lock_t *lock = data; if (lock->context == DRM_KERNEL_CONTEXT) { DRM_ERROR("Process %d using kernel context %d\n", DRM_CURRENTPID, lock->context); return EINVAL; } /* Check that the context unlock being requested actually matches * who currently holds the lock. */ if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) || _DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock) != lock->context) return EINVAL; atomic_inc(&dev->counts[_DRM_STAT_UNLOCKS]); DRM_LOCK(); drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT); if (drm_lock_free(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT)) { DRM_ERROR("\n"); } DRM_UNLOCK(); return 0; }