/** * \file drm_irq.c * IRQ support * * \author Rickard E. (Rik) Faith * \author Gareth Hughes */ /* * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com * * Copyright 1999, 2000 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 "drmP.h" #include /* For task queue support */ /** * Get interrupt from bus id. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg user argument, pointing to a drm_irq_busid structure. * \return zero on success or a negative number on failure. * * Finds the PCI device with the specified bus id and gets its IRQ number. * This IOCTL is deprecated, and will now return EINVAL for any busid not equal * to that of the device that this DRM instance attached to. */ int drm_irq_by_busid(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_irq_busid *p = data; if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) return -EINVAL; if ((p->busnum >> 8) != drm_get_pci_domain(dev) || (p->busnum & 0xff) != dev->pdev->bus->number || p->devnum != PCI_SLOT(dev->pdev->devfn) || p->funcnum != PCI_FUNC(dev->pdev->devfn)) return -EINVAL; p->irq = dev->irq; DRM_DEBUG("%d:%d:%d => IRQ %d\n", p->busnum, p->devnum, p->funcnum, p->irq); return 0; } /** * Install IRQ handler. * * \param dev DRM device. * * Initializes the IRQ related data, and setups drm_device::vbl_queue. Installs the handler, calling the driver * \c drm_driver_irq_preinstall() and \c drm_driver_irq_postinstall() functions * before and after the installation. */ static int drm_irq_install(struct drm_device * dev) { int ret; unsigned long sh_flags = 0; if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) return -EINVAL; if (dev->irq == 0) return -EINVAL; mutex_lock(&dev->struct_mutex); /* Driver must have been initialized */ if (!dev->dev_private) { mutex_unlock(&dev->struct_mutex); return -EINVAL; } if (dev->irq_enabled) { mutex_unlock(&dev->struct_mutex); return -EBUSY; } dev->irq_enabled = 1; mutex_unlock(&dev->struct_mutex); DRM_DEBUG("%s: irq=%d\n", __FUNCTION__, dev->irq); if (drm_core_check_feature(dev, DRIVER_IRQ_VBL)) { init_waitqueue_head(&dev->vbl_queue); spin_lock_init(&dev->vbl_lock); INIT_LIST_HEAD(&dev->vbl_sigs); INIT_LIST_HEAD(&dev->vbl_sigs2); dev->vbl_pending = 0; } /* Before installing handler */ dev->driver->irq_preinstall(dev); /* Install handler */ if (drm_core_check_feature(dev, DRIVER_IRQ_SHARED)) sh_flags = IRQF_SHARED; ret = request_irq(dev->irq, dev->driver->irq_handler, sh_flags, dev->devname, dev); if (ret < 0) { mutex_lock(&dev->struct_mutex); dev->irq_enabled = 0; mutex_unlock(&dev->struct_mutex); return ret; } /* After installing handler */ dev->driver->irq_postinstall(dev); return 0; } /** * Uninstall the IRQ handler. * * \param dev DRM device. * * Calls the driver's \c drm_driver_irq_uninstall() function, and stops the irq. */ int drm_irq_uninstall(struct drm_device * dev) { int irq_enabled; if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) return -EINVAL; mutex_lock(&dev->struct_mutex); irq_enabled = dev->irq_enabled; dev->irq_enabled = 0; mutex_unlock(&dev->struct_mutex); if (!irq_enabled) return -EINVAL; DRM_DEBUG("%s: irq=%d\n", __FUNCTION__, dev->irq); dev->driver->irq_uninstall(dev); free_irq(dev->irq, dev); dev->locked_tasklet_func = NULL; return 0; } EXPORT_SYMBOL(drm_irq_uninstall); /** * IRQ control ioctl. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param arg user argument, pointing to a drm_control structure. * \return zero on success or a negative number on failure. * * Calls irq_install() or irq_uninstall() according to \p arg. */ int drm_control(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_control *ctl = data; /* if we haven't irq we fallback for compatibility reasons - this used to be a separate function in drm_dma.h */ switch (ctl->func) { case DRM_INST_HANDLER: if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) return 0; if (dev->if_version < DRM_IF_VERSION(1, 2) && ctl->irq != dev->irq) return -EINVAL; return drm_irq_install(dev); case DRM_UNINST_HANDLER: if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) return 0; return drm_irq_uninstall(dev); default: return -EINVAL; } } /** * Wait for VBLANK. * * \param inode device inode. * \param file_priv DRM file private. * \param cmd command. * \param data user argument, pointing to a drm_wait_vblank structure. * \return zero on success or a negative number on failure. * * Verifies the IRQ is installed. * * If a signal is requested checks if this task has already scheduled the same signal * for the same vblank sequence number - nothing to be done in * that case. If the number of tasks waiting for the interrupt exceeds 100 the * function fails. Otherwise adds a new entry to drm_device::vbl_sigs for this * task. * * If a signal is not requested, then calls vblank_wait(). */ int drm_wait_vblank(struct drm_device *dev, void *data, struct drm_file *file_priv) { union drm_wait_vblank *vblwait = data; struct timeval now; int ret = 0; unsigned int flags, seq; if ((!dev->irq) || (!dev->irq_enabled)) return -EINVAL; if (vblwait->request.type & ~(_DRM_VBLANK_TYPES_MASK | _DRM_VBLANK_FLAGS_MASK)) { DRM_ERROR("Unsupported type value 0x%x, supported mask 0x%x\n", vblwait->request.type, (_DRM_VBLANK_TYPES_MASK | _DRM_VBLANK_FLAGS_MASK)); return -EINVAL; } flags = vblwait->request.type & _DRM_VBLANK_FLAGS_MASK; if (!drm_core_check_feature(dev, (flags & _DRM_VBLANK_SECONDARY) ? DRIVER_IRQ_VBL2 : DRIVER_IRQ_VBL)) return -EINVAL; seq = atomic_read((flags & _DRM_VBLANK_SECONDARY) ? &dev->vbl_received2 : &dev->vbl_received); switch (vblwait->request.type & _DRM_VBLANK_TYPES_MASK) { case _DRM_VBLANK_RELATIVE: vblwait->request.sequence += seq; vblwait->request.type &= ~_DRM_VBLANK_RELATIVE; case _DRM_VBLANK_ABSOLUTE: break; default: return -EINVAL; } if ((flags & _DRM_VBLANK_NEXTONMISS) && (seq - vblwait->request.sequence) <= (1<<23)) { vblwait->request.sequence = seq + 1; } if (flags & _DRM_VBLANK_SIGNAL) { unsigned long irqflags; struct list_head *vbl_sigs = (flags & _DRM_VBLANK_SECONDARY) ? &dev->vbl_sigs2 : &dev->vbl_sigs; struct drm_vbl_sig *vbl_sig; spin_lock_irqsave(&dev->vbl_lock, irqflags); /* Check if this task has already scheduled the same signal * for the same vblank sequence number; nothing to be done in * that case */ list_for_each_entry(vbl_sig, vbl_sigs, head) { if (vbl_sig->sequence == vblwait->request.sequence && vbl_sig->info.si_signo == vblwait->request.signal && vbl_sig->task == current) { spin_unlock_irqrestore(&dev->vbl_lock, irqflags); vblwait->reply.sequence = seq; goto done; } } if (dev->vbl_pending >= 100) { spin_unlock_irqrestore(&dev->vbl_lock, irqflags); return -EBUSY; } dev->vbl_pending++; spin_unlock_irqrestore(&dev->vbl_lock, irqflags); if (! (vbl_sig = drm_alloc(sizeof(struct drm_vbl_sig), DRM_MEM_DRIVER))) { return -ENOMEM; } memset((void *)vbl_sig, 0, sizeof(*vbl_sig)); vbl_sig->sequence = vblwait->request.sequence; vbl_sig->info.si_signo = vblwait->request.signal; vbl_sig->task = current; spin_lock_irqsave(&dev->vbl_lock, irqflags); list_add_tail(&vbl_sig->head, vbl_sigs); spin_unlock_irqrestore(&dev->vbl_lock, irqflags); vblwait->reply.sequence = seq; } else { if (flags & _DRM_VBLANK_SECONDARY) { if (dev->driver->vblank_wait2) ret = dev->driver->vblank_wait2(dev, &vblwait->request.sequence); } else if (dev->driver->vblank_wait) ret = dev->driver->vblank_wait(dev, &vblwait->request.sequence); do_gettimeofday(&now); vblwait->reply.tval_sec = now.tv_sec; vblwait->reply.tval_usec = now.tv_usec; } done: return ret; } /** * Send the VBLANK signals. * * \param dev DRM device. * * Sends a signal for each task in drm_device::vbl_sigs and empties the list. * * If a signal is not requested, then calls vblank_wait(). */ void drm_vbl_send_signals(struct drm_device * dev) { unsigned long flags; int i; spin_lock_irqsave(&dev->vbl_lock, flags); for (i = 0; i < 2; i++) { struct drm_vbl_sig *vbl_sig, *tmp; struct list_head *vbl_sigs = i ? &dev->vbl_sigs2 : &dev->vbl_sigs; unsigned int vbl_seq = atomic_read(i ? &dev->vbl_received2 : &dev->vbl_received); list_for_each_entry_safe(vbl_sig, tmp, vbl_s/* savage_drm.h -- Public header for the savage driver * * 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. */ #ifndef __SAVAGE_DRM_H__ #define __SAVAGE_DRM_H__ #ifndef __SAVAGE_SAREA_DEFINES__ #define __SAVAGE_SAREA_DEFINES__ /* 2 heaps (1 for card, 1 for agp), each divided into upto 128 * regions, subject to a minimum region size of (1<<16) == 64k. * * Clients may subdivide regions internally, but when sharing between * clients, the region size is the minimum granularity. */ #define SAVAGE_CARD_HEAP 0 #define SAVAGE_AGP_HEAP 1 #define SAVAGE_NR_TEX_HEAPS 2 #define SAVAGE_NR_TEX_REGIONS 16 #define SAVAGE_LOG_MIN_TEX_REGION_SIZE 16 #endif /* __SAVAGE_SAREA_DEFINES__ */ typedef struct _drm_savage_sarea { /* LRU lists for texture memory in agp space and on the card. */ struct drm_tex_region texList[SAVAGE_NR_TEX_HEAPS][SAVAGE_NR_TEX_REGIONS + 1]; unsigned int texAge[SAVAGE_NR_TEX_HEAPS]; /* Mechanism to validate card state. */ int ctxOwner; } drm_savage_sarea_t, *drm_savage_sarea_ptr; /* Savage-specific ioctls */ #define DRM_SAVAGE_BCI_INIT 0x00 #define DRM_SAVAGE_BCI_CMDBUF 0x01 #define DRM_SAVAGE_BCI_EVENT_EMIT 0x02 #define DRM_SAVAGE_BCI_EVENT_WAIT 0x03 #define DRM_IOCTL_SAVAGE_INIT DRM_IOW( DRM_COMMAND_BASE + DRM_SAVAGE_BCI_INIT, drm_savage_init_t) #define DRM_IOCTL_SAVAGE_CMDBUF DRM_IOW( DRM_COMMAND_BASE + DRM_SAVAGE_BCI_CMDBUF, drm_savage_cmdbuf_t) #define DRM_IOCTL_SAVAGE_EVENT_EMIT DRM_IOWR(DRM_COMMAND_BASE + DRM_SAVAGE_BCI_EVENT_EMIT, drm_savage_event_emit_t) #define DRM_IOCTL_SAVAGE_EVENT_WAIT DRM_IOW( DRM_COMMAND_BASE + DRM_SAVAGE_BCI_EVENT_WAIT, drm_savage_event_wait_t) #define SAVAGE_DMA_PCI 1 #define SAVAGE_DMA_AGP 3 typedef struct drm_savage_init { enum { SAVAGE_INIT_BCI = 1, SAVAGE_CLEANUP_BCI = 2 } func; unsigned int sarea_priv_offset; /* some parameters */ unsigned int cob_size; unsigned int bci_threshold_lo, bci_threshold_hi; unsigned int dma_type; /* frame buffer layout */ unsigned int fb_bpp; unsigned int front_offset, front_pitch; unsigned int back_offset, back_pitch; unsigned int depth_bpp; unsigned int depth_offset, depth_pitch; /* local textures */ unsigned int texture_offset; unsigned int texture_size; /* physical locations of non-permanent maps */ unsigned long status_offset; unsigned long buffers_offset; unsigned long agp_textures_offset; unsigned long cmd_dma_offset; } drm_savage_init_t; typedef union drm_savage_cmd_header drm_savage_cmd_header_t; typedef struct drm_savage_cmdbuf { /* command buffer in client's address space */ drm_savage_cmd_header_t *cmd_addr; unsigned int size; /* size of the command buffer in 64bit units */ unsigned int dma_idx; /* DMA buffer index to use */ int discard; /* discard DMA buffer when done */ /* vertex buffer in client's address space */ unsigned int *vb_addr; unsigned int vb_size; /* size of client vertex buffer in bytes */ unsigned int vb_stride; /* stride of vertices in 32bit words */ /* boxes in client's address space */ struct drm_clip_rect *box_addr; unsigned int nbox; /* number of clipping boxes */ } drm_savage_cmdbuf_t; #define SAVAGE_WAIT_2D 0x1 /* wait for 2D idle before updating event tag */ #define SAVAGE_WAIT_3D 0x2 /* wait for 3D idle before updating event tag */ #define SAVAGE_WAIT_IRQ 0x4 /* emit or wait for IRQ, not implemented yet */ typedef struct drm_savage_event { unsigned int count; unsigned int flags; } drm_savage_event_emit_t, drm_savage_event_wait_t; /* Commands for the cmdbuf ioctl */ #define SAVAGE_CMD_STATE 0 /* a range of state registers */ #define SAVAGE_CMD_DMA_PRIM 1 /* vertices from DMA buffer */ #define SAVAGE_CMD_VB_PRIM 2 /* vertices from client vertex buffer */ #define SAVAGE_CMD_DMA_IDX 3 /* indexed vertices from DMA buffer */ #define SAVAGE_CMD_VB_IDX 4 /* indexed vertices client vertex buffer */ #define SAVAGE_CMD_CLEAR 5 /* clear buffers */ #define SAVAGE_CMD_SWAP 6 /* swap buffers */ /* Primitive types */ #define SAVAGE_PRIM_TRILIST 0 /* triangle list */ #define SAVAGE_PRIM_TRISTRIP 1 /* triangle strip */ #define SAVAGE_PRIM_TRIFAN 2 /* triangle fan */ #define SAVAGE_PRIM_TRILIST_201 3 /* reorder verts for correct flat * shading on s3d */ /* Skip flags (vertex format) */ #define SAVAGE_SKIP_Z 0x01 #define SAVAGE_SKIP_W 0x02 #define SAVAGE_SKIP_C0 0x04 #define SAVAGE_SKIP_C1 0x08 #define SAVAGE_SKIP_S0 0x10 #define SAVAGE_SKIP_T0 0x20 #define SAVAGE_SKIP_ST0 0x30 #define SAVAGE_SKIP_S1 0x40 #define SAVAGE_SKIP_T1 0x80 #define SAVAGE_SKIP_ST1 0xc0 #define SAVAGE_SKIP_ALL_S3D 0x3f #define SAVAGE_SKIP_ALL_S4 0xff /* Buffer names for clear command */ #define SAVAGE_FRONT 0x1 #define SAVAGE_BACK 0x2 #define SAVAGE_DEPTH 0x4 /* 64-bit command header */ union drm_savage_cmd_header { struct { unsigned char cmd; /* command */ unsigned char pad0; unsigned short pad1; unsigned short pad2; unsigned short pad3; } cmd; /* generic */ struct { unsigned char cmd; unsigned char global; /* need idle engine? */ unsigned short count; /* number of consecutive registers */ unsigned short start; /* first register */ unsigned short pad3; } state; /* SAVAGE_CMD_STATE */ struct { unsigned char cmd; unsigned char prim; /* primitive type */ unsigned short skip; /* vertex format (skip flags) */ unsigned short count; /* number of vertices */ unsigned short start; /* first vertex in DMA/vertex buffer */ } prim; /* SAVAGE_CMD_DMA_PRIM, SAVAGE_CMD_VB_PRIM */ struct { unsigned char cmd; unsigned char prim; unsigned short skip; unsigned short count; /* number of indices that follow */ unsigned short pad3; } idx; /* SAVAGE_CMD_DMA_IDX, SAVAGE_CMD_VB_IDX */ struct { unsigned char cmd; unsigned char pad0; unsigned short pad1; unsigned int flags; } clear0; /* SAVAGE_CMD_CLEAR */ struct { unsigned int mask; unsigned int value; } clear1; /* SAVAGE_CMD_CLEAR data */ }; #endif
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