/* i915_dma.c -- DMA support for the I915 -*- linux-c -*- */ /* * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. * 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 TUNGSTEN GRAPHICS 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. * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include "intel_drv.h" #include #include "i915_drv.h" #include "i915_trace.h" #include #include #include #include #include #include #include #include #include #include #define LP_RING(d) (&((struct drm_i915_private *)(d))->ring[RCS]) #define BEGIN_LP_RING(n) \ intel_ring_begin(LP_RING(dev_priv), (n)) #define OUT_RING(x) \ intel_ring_emit(LP_RING(dev_priv), x) #define ADVANCE_LP_RING() \ __intel_ring_advance(LP_RING(dev_priv)) /** * Lock test for when it's just for synchronization of ring access. * * In that case, we don't need to do it when GEM is initialized as nobody else * has access to the ring. */ #define RING_LOCK_TEST_WITH_RETURN(dev, file) do { \ if (LP_RING(dev->dev_private)->buffer->obj == NULL) \ LOCK_TEST_WITH_RETURN(dev, file); \ } while (0) static inline u32 intel_read_legacy_status_page(struct drm_i915_private *dev_priv, int reg) { if (I915_NEED_GFX_HWS(dev_priv->dev)) return ioread32(dev_priv->dri1.gfx_hws_cpu_addr + reg); else return intel_read_status_page(LP_RING(dev_priv), reg); } #define READ_HWSP(dev_priv, reg) intel_read_legacy_status_page(dev_priv, reg) #define READ_BREADCRUMB(dev_priv) READ_HWSP(dev_priv, I915_BREADCRUMB_INDEX) #define I915_BREADCRUMB_INDEX 0x21 void i915_update_dri1_breadcrumb(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_master_private *master_priv; /* * The dri breadcrumb update races against the drm master disappearing. * Instead of trying to fix this (this is by far not the only ums issue) * just don't do the update in kms mode. */ if (drm_core_check_feature(dev, DRIVER_MODESET)) return; if (dev->primary->master) { master_priv = dev->primary->master->driver_priv; if (master_priv->sarea_priv) master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); } } static void i915_write_hws_pga(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; u32 addr; addr = dev_priv->status_page_dmah->busaddr; if (INTEL_INFO(dev)->gen >= 4) addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0; I915_WRITE(HWS_PGA, addr); } /** * Frees the hardware status page, whether it's a physical address or a virtual * address set up by the X Server. */ static void i915_free_hws(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_engine_cs *ring = LP_RING(dev_priv); if (dev_priv->status_page_dmah) { drm_pci_free(dev, dev_priv->status_page_dmah); dev_priv->status_page_dmah = NULL; } if (ring->status_page.gfx_addr) { ring->status_page.gfx_addr = 0; iounmap(dev_priv->dri1.gfx_hws_cpu_addr); } /* Need to rewrite hardware status page */ I915_WRITE(HWS_PGA, 0x1ffff000); } void i915_kernel_lost_context(struct drm_device * dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_master_private *master_priv; struct intel_engine_cs *ring = LP_RING(dev_priv); struct intel_ringbuffer *ringbuf = ring->buffer; /* * We should never lose context on the ring with modesetting * as we don't expose it to userspace */ if (drm_core_check_feature(dev, DRIVER_MODESET)) return; ringbuf->head = I915_READ_HEAD(ring) & HEAD_ADDR; ringbuf->tail = I915_READ_TAIL(ring) & TAIL_ADDR; ringbuf->space = ringbuf->head - (ringbuf->tail + I915_RING_FREE_SPACE); if (ringbuf->space < 0) ringbuf->space += ringbuf->size; if (!dev->primary->master) return; master_priv = dev->primary->master->driver_priv; if (ringbuf->head == ringbuf->tail && master_priv->sarea_priv) master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY; } static int i915_dma_cleanup(struct drm_device * dev) { struct drm_i915_private *dev_priv = dev->dev_private; int i; /* Make sure interrupts are disabled here because the uninstall ioctl * may not have been called from userspace and after dev_private * is freed, it's too late. */ if (dev->irq_enabled) drm_irq_uninstall(dev); mutex_lock(&dev->struct_mutex); for (i = 0; i < I915_NUM_RINGS; i++) intel_cleanup_ring_buffer(&dev_priv->ring[i]); mutex_unlock(&dev->struct_mutex); /* Clear the HWS virtual address at teardown */ if (I915_NEED_GFX_HWS(dev)) i915_free_hws(dev); return 0; } static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; int ret; master_priv->sarea = drm_getsarea(dev); if (master_priv->sarea) { master_priv->sarea_priv = (drm_i915_sarea_t *) ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset); } else { DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n"); } if (init->ring_size != 0) { if (LP_RING(dev_priv)->buffer->obj != NULL) { i915_dma_cleanup(dev); DRM_ERROR("Client tried to initialize ringbuffer in " "GEM mode\n"); return -EINVAL; } ret = intel_render_ring_init_dri(dev, init->ring_start, init->ring_size); if (ret) { i915_dma_cleanup(dev); return ret; } } dev_priv->dri1.cpp = init->cpp; dev_priv->dri1.back_offset = init->back_offset; dev_priv->dri1.front_offset = init->front_offset; dev_priv->dri1.current_page = 0; if (master_priv->sarea_priv) master_priv->sarea_priv->pf_current_page = 0; /* Allow hardware batchbuffers unless told otherwise. */ dev_priv->dri1.allow_batchbuffer = 1; return 0; } static int i915_dma_resume(struct drm_device * dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_engine_cs *ring = LP_RING(dev_priv); DRM_DEBUG_DRIVER("%s\n", __func__); if (ring->buffer->virtual_start == NULL) { DRM_ERROR("can not ioremap virtual address for" " ring buffer\n"); return -ENOMEM; } /* Program Hardware Status Page */ if (!ring->status_page.page_addr) { DRM_ERROR("Can not find hardware status page\n"); return -EINVAL; } DRM_DEBUG_DRIVER("hw status page @ %p\n", ring->status_page.page_addr); if (ring->status_page.gfx_addr != 0) intel_ring_setup_status_page(ring); else i915_write_hws_pga(dev); DRM_DEBUG_DRIVER("Enabled hardware status page\n"); return 0; } static int i915_dma_init(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_i915_init_t *init = data; int retcode = 0; if (drm_core_check_feature(dev, DRIVER_MODESET)) return -ENODEV; switch (init->func) { case I915_INIT_DMA: retcode = i915_initialize(dev, init); break; case I915_CLEANUP_DMA: retcode = i915_dma_cleanup(dev); break; case I915_RESUME_DMA: retcode = i915_dma_resume(dev); break; default: retcode = -EINVAL; break; } return retcode; } /* Implement basically the same security restrictions as hardware does * for MI_BATCH_NON_SECURE. These can be made stricter at any time. * * Most of the calculations below involve calculating the size of a * particular instruction. It's important to get the size right as * that tells us where the next instruction to check is. Any illegal * instruction detected will be given a size of zero, which is a * signal to abort the rest of the buffer. */ static int validate_cmd(int cmd) { switch (((cmd >> 29) & 0x7)) { case 0x0: switch ((cmd >> 23) & 0x3f) { case 0x0: return 1; /* MI_NOOP */ case 0x4: return 1; /* MI_FLUSH */ default: return 0; /* disallow everything else */ } break; case 0x1: return 0; /* reserved */ case 0x2: return (cmd & 0xff) + 2; /* 2d commands */ case 0x3: if (((cmd >> 24) & 0x1f) <= 0x18) return 1; switch ((cmd >> 24) & 0x1f) { case 0x1c: return 1; case 0x1d: switch ((cmd >> 16) & 0xff) { case 0x3: return (cmd & 0x1f) + 2; case 0x4: return (cmd & 0xf) + 2; default: return (cmd & 0xffff) + 2; } case 0x1e: if (cmd & (1 << 23)) return (cmd & 0xffff) + 1; else return 1; case 0x1f: if ((cmd & (1 << 23)) == 0) /* inline vertices */ return (cmd & 0x1ffff) + 2; else if (cmd & (1 << 17)) /* indirect random */ if ((cmd & 0xffff) == 0) return 0; /* unknown length, too hard */ else return (((cmd & 0xffff) + 1) / 2) + 1; else return 2; /* indirect sequential */ default: return 0; } default: return 0; } return 0; } static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords) { struct drm_i915_private *dev_priv = dev->dev_private; int i, ret; if ((dwords+1) * sizeof(int) >= LP_RING(dev_priv)->buffer->size - 8) return -EINVAL; for (i = 0; i < dwords;) { int sz = validate_cmd(buffer[i]); if (sz == 0 || i + sz > dwords) return -EINVAL; i += sz; } ret = BEGIN_LP_RING((dwords+1)&~1); if (ret) return ret; for (i = 0; i < dwords; i++) OUT_RING(buffer[i]); if (dwords & 1) OUT_RING(0); ADVANCE_LP_RING(); return 0; } int i915_emit_box(struct drm_device *dev, struct drm_clip_rect *box, int DR1, int DR4) { struct drm_i915_private *dev_priv = dev->dev_private; int ret; if (box->y2 <= box->y1 || box->x2 <= box->x1 || box->y2 <= 0 || box->x2 <= 0) { DRM_ERROR("Bad box %d,%d..%d,%d\n", box->x1, box->y1, box->x2, box->y2); return -EINVAL; } if (INTEL_INFO(dev)->gen >= 4) { ret = BEGIN_LP_RING(4); if (ret) return ret; OUT_RING(GFX_OP_DRAWRECT_INFO_I965); OUT_RING((box->x1 & 0xffff) | (box->y1 << 16)); OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16)); OUT_RING(DR4); } else { ret = BEGIN_LP_RING(6); if (ret) return ret; OUT_RING(GFX_OP_DRAWRECT_INFO); OUT_RING(DR1); OUT_RING((box->x1 & 0xffff) | (box->y1 << 16)); OUT_RING(((box->x2 - 1) & 0xffff) | ((box->y2 - 1) << 16)); OUT_RING(DR4); OUT_RING(0); } ADVANCE_LP_RING(); return 0; } /* XXX: Emitting the counter should really be moved to part of the IRQ * emit. For now, do it in both places: */ static void i915_emit_breadcrumb(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; dev_priv->dri1.counter++; if (dev_priv->dri1.counter > 0x7FFFFFFFUL) dev_priv->dri1.counter = 0; if (master_priv->sarea_priv) master_priv->sarea_priv->last_enqueue = dev_priv->dri1.counter; if (BEGIN_LP_RING(4) == 0) { OUT_RING(MI_STORE_DWORD_INDEX); OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); OUT_RING(dev_priv->dri1.counter); OUT_RING(0); ADVANCE_LP_RING(); } } static int i915_dispatch_cmdbuffer(struct drm_device * dev, drm_i915_cmdbuffer_t *cmd, struct drm_clip_rect *cliprects, void *cmdbuf) { int nbox = cmd->num_cliprects; int i = 0, count, ret; if (cmd->sz & 0x3) { DRM_ERROR("alignment"); return -EINVAL; } i915_kernel_lost_context(dev); count = nbox ? nbox : 1; for (i = 0; i < count; i++) { if (i < nbox) { ret = i915_emit_box(dev, &cliprects[i], cmd->DR1, cmd->DR4); if (ret) return ret; } ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4); if (ret) return ret; } i915_emit_breadcrumb(dev); return 0; } static int i915_dispatch_batchbuffer(struct drm_device * dev, drm_i915_batchbuffer_t * batch, struct drm_clip_rect *cliprects) { struct drm_i915_private *dev_priv = dev->dev_private; int nbox = batch->num_cliprects; int i, count, ret; if ((batch->start | batch->used) & 0x7) { DRM_ERROR("alignment"); return -EINVAL; } i915_kernel_lost_context(dev); count = nbox ? nbox : 1; for (i = 0; i < count; i++) { if (i < nbox) { ret = i915_emit_box(dev, &cliprects[i], batch->DR1, batch->DR4); if (ret) return ret; } if (!IS_I830(dev) && !IS_845G(dev)) { ret = BEGIN_LP_RING(2); if (ret) return ret; if (INTEL_INFO(dev)->gen >= 4) { OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965); OUT_RING(batch->start); } else { OUT_RING(MI_BATCH_BUFFER_START | (2 << 6)); OUT_RING(batch->start | MI_BATCH_NON_SECURE); } } else { ret = BEGIN_LP_RING(4); if (ret) return ret; OUT_RING(MI_BATCH_BUFFER); OUT_RING(batch->start | MI_BATCH_NON_SECURE); OUT_RING(batch->start + batch->used - 4); OUT_RING(0); } ADVANCE_LP_RING(); } if (IS_G4X(dev) || IS_GEN5(dev)) { if (BEGIN_LP_RING(2) == 0) { OUT_RING(MI_FLUSH | MI_NO_WRITE_FLUSH | MI_INVALIDATE_ISP); OUT_RING(MI_NOOP); ADVANCE_LP_RING(); } } i915_emit_breadcrumb(dev); return 0; } static int i915_dispatch_flip(struct drm_device * dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; int ret; if (!master_priv->sarea_priv) return -EINVAL; DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n", __func__, dev_priv->dri1.current_page, master_priv->sarea_priv->pf_current_page); i915_kernel_lost_context(dev); ret = BEGIN_LP_RING(10); if (ret) return ret; OUT_RING(MI_FLUSH | MI_READ_FLUSH); OUT_RING(0); OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP); OUT_RING(0); if (dev_priv->dri1.current_page == 0) { OUT_RING(dev_priv->dri1.back_offset); dev_priv->dri1.current_page = 1; } else { OUT_RING(dev_priv->dri1.front_offset); dev_priv->dri1.current_page = 0; } OUT_RING(0); OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP); OUT_RING(0); ADVANCE_LP_RING(); master_priv->sarea_priv->last_enqueue = dev_priv->dri1.counter++; if (BEGIN_LP_RING(4) == 0) { OUT_RING(MI_STORE_DWORD_INDEX); OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); OUT_RING(dev_priv->dri1.counter); OUT_RING(0); ADVANCE_LP_RING(); } master_priv->sarea_priv->pf_current_page = dev_priv->dri1.current_page; return 0; } static int i915_quiescent(struct drm_device *dev) { i915_kernel_lost_context(dev); return intel_ring_idle(LP_RING(dev->dev_private)); } static int i915_flush_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { int ret; if (drm_core_check_feature(dev, DRIVER_MODESET)) return -ENODEV; RING_LOCK_TEST_WITH_RETURN(dev, file_priv); mutex_lock(&dev->struct_mutex); ret = i915_quiescent(dev); mutex_unlock(&dev->struct_mutex); return ret; } static int i915_batchbuffer(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_master_private *master_priv; drm_i915_sarea_t *sarea_priv; drm_i915_batchbuffer_t *batch = data; int ret; struct drm_clip_rect *cliprects = NULL; if (drm_core_check_feature(dev, DRIVER_MODESET)) return -ENODEV; master_priv = dev->primary->master->driver_priv; sarea_priv = (drm_i915_sarea_t *) master_priv->sarea_priv; if (!dev_priv->dri1.allow_batchbuffer) { DRM_ERROR("Batchbuffer ioctl disabled\n"); return -EINVAL; } DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n", batch->start, batch->used, batch->num_cliprects); RING_LOCK_TEST_WITH_RETURN(dev, file_priv); if (batch->num_cliprects < 0) return -EINVAL; if (batch->num_cliprects) { cliprects = kcalloc(batch->num_cliprects, sizeof(*cliprects), GFP_KERNEL); if (cliprects == NULL) return -ENOMEM; ret = copy_from_user(cliprects, batch->cliprects, batch->num_cliprects * sizeof(struct drm_clip_rect)); if (ret != 0) { ret = -EFAULT; goto fail_free; } } mutex_lock(&dev->struct_mutex); ret = i915_dispatch_batchbuffer(dev, batch, cliprects); mutex_unlock(&dev->struct_mutex); if (sarea_priv) sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); fail_free: kfree(cliprects); return ret; } static int i915_cmdbuffer(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_master_private *master_priv; drm_i915_sarea_t *sarea_priv; drm_i915_cmdbuffer_t *cmdbuf = data; struct drm_clip_rect *cliprects = NULL; void *batch_data; int ret; DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n", cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects); if (drm_core_check_feature(dev, DRIVER_MODESET)) return -ENODEV; master_priv = dev->primary->master->driver_priv; sarea_priv = (drm_i915_sarea_t *) master_priv->sarea_priv; RING_LOCK_TEST_WITH_RETURN(dev, file_priv); if (cmdbuf->num_cliprects < 0) return -EINVAL; batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL); if (batch_data == NULL) return -ENOMEM; ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz); if (ret != 0) { ret = -EFAULT; goto fail_batch_free; } if (cmdbuf->num_cliprects) { cliprects = kcalloc(cmdbuf->num_cliprects, sizeof(*cliprects), GFP_KERNEL); if (cliprects == NULL) { ret = -ENOMEM; goto fail_batch_free; } ret = copy_from_user(cliprects, cmdbuf->cliprects, cmdbuf->num_cliprects * sizeof(struct drm_clip_rect)); if (ret != 0) { ret = -EFAULT; goto fail_clip_free; } } mutex_lock(&dev->struct_mutex); ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data); mutex_unlock(&dev->struct_mutex); if (ret) { DRM_ERROR("i915_dispatch_cmdbuffer failed\n"); goto fail_clip_free; } if (sarea_priv) sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); fail_clip_free: kfree(cliprects); fail_batch_free: kfree(batch_data); return ret; } static int i915_emit_irq(struct drm_device * dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; i915_kernel_lost_context(dev); DRM_DEBUG_DRIVER("\n"); dev_priv->dri1.counter++; if (dev_priv->dri1.counter > 0x7FFFFFFFUL) dev_priv->dri1.counter = 1; if (master_priv->sarea_priv) master_priv->sarea_priv->last_enqueue = dev_priv->dri1.counter; if (BEGIN_LP_RING(4) == 0) { OUT_RING(MI_STORE_DWORD_INDEX); OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); OUT_RING(dev_priv->dri1.counter); OUT_RING(MI_USER_INTERRUPT); ADVANCE_LP_RING(); } return dev_priv->dri1.counter; } static int i915_wait_irq(struct drm_device * dev, int irq_nr) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; int ret = 0; struct intel_engine_cs *ring = LP_RING(dev_priv); DRM_DEBUG_DRIVER("irq_nr=%d breadcrumb=%d\n", irq_nr, READ_BREADCRUMB(dev_priv)); if (READ_BREADCRUMB(dev_priv) >= irq_nr) { if (master_priv->sarea_priv) master_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); return 0; } if (master_priv->sarea_priv) master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; if (ring->irq_get(ring)) { DRM_WAIT_ON(ret, ring->irq_queue, 3 * HZ, READ_BREADCRUMB(dev_priv) >= irq_nr); ring->irq_put(ring); } else if (wait_for(READ_BREADCRUMB(dev_priv) >= irq_nr, 3000)) ret = -EBUSY; if (ret == -EBUSY) { DRM_ERROR("EBUSY -- rec: %d emitted: %d\n", READ_BREADCRUMB(dev_priv), (int)dev_priv->dri1.counter); } return ret; } /* Needs the lock as it touches the ring. */ static int i915_irq_emit(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; drm_i915_irq_emit_t *emit = data; int result; if (drm_core_check_feature(dev, DRIVER_MODESET)) return -ENODEV; if (!dev_priv || !LP_RING(dev_priv)->buffer->virtual_start) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } RING_LOCK_TEST_WITH_RETURN(dev, file_priv); mutex_lock(&dev->struct_mutex); result = i915_emit_irq(dev); mutex_unlock(&dev->struct_mutex); if (copy_to_user(emit->irq_seq, &result, sizeof(int))) { DRM_ERROR("copy_to_user\n"); return -EFAULT; } return 0; } /* Doesn't need the hardware lock. */ static int i915_irq_wait(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; drm_i915_irq_wait_t *irqwait = data; if (drm_core_check_feature(dev, DRIVER_MODESET)) return -ENODEV; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } return i915_wait_irq(dev, irqwait->irq_seq); } static int i915_vblank_pipe_get(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; drm_i915_vblank_pipe_t *pipe = data; if (drm_core_check_feature(dev, DRIVER_MODESET)) return -ENODEV; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } pipe->pipe = DRM_I915_VBLANK_PIPE_A | DRM_I915_VBLANK_PIPE_B; return 0; } /** * Schedule buffer swap at given vertical blank. */ static int i915_vblank_swap(struct drm_device *dev, void *data, struct drm_file *file_priv) { /* The delayed swap mechanism was fundamentally racy, and has been * removed. The model was that the client requested a delayed flip/swap * from the kernel, then waited for vblank before continuing to perform * rendering. The problem was that the kernel might wake the client * up before it dispatched the vblank swap (since the lock has to be * held while touching the ringbuffer), in which case the client would * clear and start the next frame before the swap occurred, and * flicker would occur in addition to likely missing the vblank. * * In the absence of this ioctl, userland falls back to a correct path * of waiting for a vblank, then dispatching the swap on its own. * Context switching to userland and back is plenty fast enough for * meeting the requirements of vblank swapping. */ return -EINVAL; } static int i915_flip_bufs(struct drm_device *dev, void *data, struct drm_file *file_priv) { int ret; if (drm_core_check_feature(dev, DRIVER_MODESET)) return -ENODEV; DRM_DEBUG_DRIVER("%s\n", __func__); RING_LOCK_TEST_WITH_RETURN(dev, file_priv); mutex_lock(&dev->struct_mutex); ret = i915_dispatch_flip(dev); mutex_unlock(&dev->struct_mutex); return ret; } static int i915_getparam(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; drm_i915_getparam_t *param = data; int value; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } switch (param->param) { case I915_PARAM_IRQ_ACTIVE: value = dev->pdev->irq ? 1 : 0; break; case I915_PARAM_ALLOW_BATCHBUFFER: value = dev_priv->dri1.allow_batchbuffer ? 1 : 0; break; case I915_PARAM_LAST_DISPATCH: value = READ_BREADCRUMB(dev_priv); break; case I915_PARAM_CHIPSET_ID: value = dev->pdev->device; break; case I915_PARAM_HAS_GEM: value = 1; break; case I915_PARAM_NUM_FENCES_AVAIL: value = dev_priv->num_fence_regs - dev_priv->fence_reg_start; break; case I915_PARAM_HAS_OVERLAY: value = dev_priv->overlay ? 1 : 0; break; case I915_PARAM_HAS_PAGEFLIPPING: value = 1; break; case I915_PARAM_HAS_EXECBUF2: /* depends on GEM */ value = 1; break; case I915_PARAM_HAS_BSD: value = intel_ring_initialized(&dev_priv->ring[VCS]); break; case I915_PARAM_HAS_BLT: value = intel_ring_initialized(&dev_priv->ring[BCS]); break; case I915_PARAM_HAS_VEBOX: value = intel_ring_initialized(&dev_priv->ring[VECS]); break; case I915_PARAM_HAS_RELAXED_FENCING: value = 1; break; case I915_PARAM_HAS_COHERENT_RINGS: value = 1; break; case I915_PARAM_HAS_EXEC_CONSTANTS: value = INTEL_INFO(dev)->gen >= 4; break; case I915_PARAM_HAS_RELAXED_DELTA: value = 1; break; case I915_PARAM_HAS_GEN7_SOL_RESET: value = 1; break; case I915_PARAM_HAS_LLC: value = HAS_LLC(dev); break; case I915_PARAM_HAS_WT: value = HAS_WT(dev); break; case I915_PARAM_HAS_ALIASING_PPGTT: value = dev_priv->mm.aliasing_ppgtt || USES_FULL_PPGTT(dev); break; case I915_PARAM_HAS_WAIT_TIMEOUT: value = 1; break; case I915_PARAM_HAS_SEMAPHORES: value = i915_semaphore_is_enabled(dev); break; case I915_PARAM_HAS_PRIME_VMAP_FLUSH: value = 1; break; case I915_PARAM_HAS_SECURE_BATCHES: value = capable(CAP_SYS_ADMIN); break; case I915_PARAM_HAS_PINNED_BATCHES: value = 1; break; case I915_PARAM_HAS_EXEC_NO_RELOC: value = 1; break; case I915_PARAM_HAS_EXEC_HANDLE_LUT: value = 1; break; case I915_PARAM_CMD_PARSER_VERSION: value = i915_cmd_parser_get_version(); break; default: DRM_DEBUG("Unknown parameter %d\n", param->param); return -EINVAL; } if (copy_to_user(param->value, &value, sizeof(int))) { DRM_ERROR("copy_to_user failed\n"); return -EFAULT; } return 0; } static int i915_setparam(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; drm_i915_setparam_t *param = data; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } switch (param->param) { case I915_SETPARAM_USE_MI_BATCHBUFFER_START: break; case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY: break; case I915_SETPARAM_ALLOW_BATCHBUFFER: dev_priv->dri1.allow_batchbuffer = param->value ? 1 : 0; break; case I915_SETPARAM_NUM_USED_FENCES: if (param->value > dev_priv->num_fence_regs || param->value < 0) return -EINVAL; /* Userspace can use first N regs */ dev_priv->fence_reg_start = param->value; break; default: DRM_DEBUG_DRIVER("unknown parameter %d\n", param->param); return -EINVAL; } return 0; } static int i915_set_status_page(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_i915_private *dev_priv = dev->dev_private; drm_i915_hws_addr_t *hws = data; struct intel_engine_cs *ring; if (drm_core_check_feature(dev, DRIVER_MODESET)) return -ENODEV; if (!I915_NEED_GFX_HWS(dev)) return -EINVAL; if (!dev_priv) { DRM_ERROR("called with no initialization\n"); return -EINVAL; } if (drm_core_check_feature(dev, DRIVER_MODESET)) { WARN(1, "tried to set status page when mode setting active\n"); return 0; } DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr); ring = LP_RING(dev_priv); ring->status_page.gfx_addr = hws->addr & (0x1ffff<<12); dev_priv->dri1.gfx_hws_cpu_addr = ioremap_wc(dev_priv->gtt.mappable_base + hws->addr, 4096); if (dev_priv->dri1.gfx_hws_cpu_addr == NULL) { i915_dma_cleanup(dev); ring->status_page.gfx_addr = 0; DRM_ERROR("can not ioremap virtual address for" " G33 hw status page\n"); return -ENOMEM; } memset_io(dev_priv->dri1.gfx_hws_cpu_addr, 0, PAGE_SIZE); I915_WRITE(HWS_PGA, ring->status_page.gfx_addr); DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n", ring->status_page.gfx_addr); DRM_DEBUG_DRIVER("load hws at %p\n", ring->status_page.page_addr); return 0; } static int i915_get_bridge_dev(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0)); if (!dev_priv->bridge_dev) { DRM_ERROR("bridge device not found\n"); return -1; } return 0; } #define MCHBAR_I915 0x44 #define MCHBAR_I965 0x48 #define MCHBAR_SIZE (4*4096) #define DEVEN_REG 0x54 #define DEVEN_MCHBAR_EN (1 << 28) /* Allocate space for the MCH regs if needed, return nonzero on error */ static int intel_alloc_mchbar_resource(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915; u32 temp_lo, temp_hi = 0; u64 mchbar_addr; int ret; if (INTEL_INFO(dev)->gen >= 4) pci_read_config_dword(dev_priv->bridge_dev, reg + 4, &temp_hi); pci_read_config_dword(dev_priv->bridge_dev, reg, &temp_lo); mchbar_addr = ((u64)temp_hi << 32) | temp_lo; /* If ACPI doesn't have it, assume we need to allocate it ourselves */ #ifdef CONFIG_PNP if (mchbar_addr && pnp_range_reserved(mchbar_addr, mchbar_addr + MCHBAR_SIZE)) return 0; #endif /* Get some space for it */ dev_priv->mch_res.name = "i915 MCHBAR"; dev_priv->mch_res.flags = IORESOURCE_MEM; ret = pci_bus_alloc_resource(dev_priv->bridge_dev->bus, &dev_priv->mch_res, MCHBAR_SIZE, MCHBAR_SIZE, PCIBIOS_MIN_MEM, 0, pcibios_align_resource, dev_priv->bridge_dev); if (ret) { DRM_DEBUG_DRIVER("failed bus alloc: %d\n", ret); dev_priv->mch_res.start = 0; return ret; } if (INTEL_INFO(dev)->gen >= 4) pci_write_config_dword(dev_priv->bridge_dev, reg + 4, upper_32_bits(dev_priv->mch_res.start)); pci_write_config_dword(dev_priv->bridge_dev, reg, lower_32_bits(dev_priv->mch_res.start)); return 0; } /* Setup MCHBAR if possible, return true if we should disable it again */ static void intel_setup_mchbar(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915; u32 temp; bool enabled; if (IS_VALLEYVIEW(dev)) return; dev_priv->mchbar_need_disable = false; if (IS_I915G(dev) || IS_I915GM(dev)) { pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp); enabled = !!(temp & DEVEN_MCHBAR_EN); } else { pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp); enabled = temp & 1; } /* If it's already enabled, don't have to do anything */ if (enabled) return; if (intel_alloc_mchbar_resource(dev)) return; dev_priv->mchbar_need_disable = true; /* Space is allocated or reserved, so enable it. */ if (IS_I915G(dev) || IS_I915GM(dev)) { pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp | DEVEN_MCHBAR_EN); } else { pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp); pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp | 1); } } static void intel_teardown_mchbar(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int mchbar_reg = INTEL_INFO(dev)->gen >= 4 ? MCHBAR_I965 : MCHBAR_I915; u32 temp; if (dev_priv->mchbar_need_disable) { if (IS_I915G(dev) || IS_I915GM(dev)) { pci_read_config_dword(dev_priv->bridge_dev, DEVEN_REG, &temp); temp &= ~DEVEN_MCHBAR_EN; pci_write_config_dword(dev_priv->bridge_dev, DEVEN_REG, temp); } else { pci_read_config_dword(dev_priv->bridge_dev, mchbar_reg, &temp); temp &= ~1; pci_write_config_dword(dev_priv->bridge_dev, mchbar_reg, temp); } } if (dev_priv->mch_res.start) release_resource(&dev_priv->mch_res); } /* true = enable decode, false = disable decoder */ static unsigned int i915_vga_set_decode(void *cookie, bool state) { struct drm_device *dev = cookie; intel_modeset_vga_set_state(dev, state); if (state) return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM | VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM; else return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM; } static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state) { struct drm_device *dev = pci_get_drvdata(pdev); pm_message_t pmm = { .event = PM_EVENT_SUSPEND }; if (state == VGA_SWITCHEROO_ON) { pr_info("switched on\n"); dev->switch_power_state = DRM_SWITCH_POWER_CHANGING; /* i915 resume handler doesn't set to D0 */ pci_set_power_state(dev->pdev, PCI_D0); i915_resume(dev); dev->switch_power_state = DRM_SWITCH_POWER_ON; } else { pr_err("switched off\n"); dev->switch_power_state = DRM_SWITCH_POWER_CHANGING; i915_suspend(dev, pmm); dev->switch_power_state = DRM_SWITCH_POWER_OFF; } } static bool i915_switcheroo_can_switch(struct pci_dev *pdev) { struct drm_device *dev = pci_get_drvdata(pdev); /* * FIXME: open_count is protected by drm_global_mutex but that would lead to * locking inversion with the driver load path. And the access here is * completely racy anyway. So don't bother with locking for now. */ return dev->open_count == 0; } static const struct vga_switcheroo_client_ops i915_switcheroo_ops = { .set_gpu_state = i915_switcheroo_set_state, .reprobe = NULL, .can_switch = i915_switcheroo_can_switch, }; static int i915_load_modeset_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int ret; ret = intel_parse_bios(dev); if (ret) DRM_INFO("failed to find VBIOS tables\n"); /* If we have > 1 VGA cards, then we need to arbitrate access * to the common VGA resources. * * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA), * then we do not take part in VGA arbitration and the * vga_client_register() fails with -ENODEV. */ ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode); if (ret && ret != -ENODEV) goto out; intel_register_dsm_handler(); ret = vga_switcheroo_register_client(dev->pdev, &i915_switcheroo_ops, false); if (ret) goto cleanup_vga_client; /* Initialise stolen first so that we may reserve preallocated * objects for the BIOS to KMS transition. */ ret = i915_gem_init_stolen(dev); if (ret) goto cleanup_vga_switcheroo; intel_power_domains_init_hw(dev_priv); ret = drm_irq_install(dev, dev->pdev->irq); if (ret) goto cleanup_gem_stolen; /* Important: The output setup functions called by modeset_init need * working irqs for e.g. gmbus and dp aux transfers. */ intel_modeset_init(dev); ret = i915_gem_init(dev); if (ret) goto cleanup_irq; INIT_WORK(&dev_priv->console_resume_work, intel_console_resume); intel_modeset_gem_init(dev); /* Always safe in the mode setting case. */ /* FIXME: do pre/post-mode set stuff in core KMS code */ dev->vblank_disable_allowed = true; if (INTEL_INFO(dev)->num_pipes == 0) return 0; ret = intel_fbdev_init(dev); if (ret) goto cleanup_gem; /* Only enable hotplug handling once the fbdev is fully set up. */ intel_hpd_init(dev); /* * Some ports require correctly set-up hpd registers for detection to * work properly (leading to ghost connected connector status), e.g. VGA * on gm45. Hence we can only set up the initial fbdev config after hpd * irqs are fully enabled. Now we should scan for the initial config * only once hotplug handling is enabled, but due to screwed-up locking * around kms/fbdev init we can't protect the fdbev initial config * scanning against hotplug events. Hence do this first and ignore the * tiny window where we will loose hotplug notifactions. */ intel_fbdev_initial_config(dev); /* Only enable hotplug handling once the fbdev is fully set up. */ dev_priv->enable_hotplug_processing = true; drm_kms_helper_poll_init(dev); return 0; cleanup_gem: mutex_lock(&dev->struct_mutex); i915_gem_cleanup_ringbuffer(dev); i915_gem_context_fini(dev); mutex_unlock(&dev->struct_mutex); WARN_ON(dev_priv->mm.aliasing_ppgtt); drm_mm_takedown(&dev_priv->gtt.base.mm); cleanup_irq: drm_irq_uninstall(dev); cleanup_gem_stolen: i915_gem_cleanup_stolen(dev); cleanup_vga_switcheroo: vga_switcheroo_unregister_client(dev->pdev); cleanup_vga_client: vga_client_register(dev->pdev, NULL, NULL, NULL); out: return ret; } int i915_master_create(struct drm_device *dev, struct drm_master *master) { struct drm_i915_master_private *master_priv; master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL); if (!master_priv) return -ENOMEM; master->driver_priv = master_priv; return 0; } void i915_master_destroy(struct drm_device *dev, struct drm_master *master) { struct drm_i915_master_private *master_priv = master->driver_priv; if (!master_priv) return; kfree(master_priv); master->driver_priv = NULL; } #if IS_ENABLED(CONFIG_FB) static void i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv) { struct apertures_struct *ap; struct pci_dev *pdev = dev_priv->dev->pdev; bool primary; ap = alloc_apertures(1); if (!ap) return; ap->ranges[0].base = dev_priv->gtt.mappable_base; ap->ranges[0].size = dev_priv->gtt.mappable_end; primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW; remove_conflicting_framebuffers(ap, "inteldrmfb", primary); kfree(ap); } #else static void i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv) { } #endif static void i915_dump_device_info(struct drm_i915_private *dev_priv) { const struct intel_device_info *info = &dev_priv->info; #define PRINT_S(name) "%s" #define SEP_EMPTY #define PRINT_FLAG(name) info->name ? #name "," : "" #define SEP_COMMA , DRM_DEBUG_DRIVER("i915 device info: gen=%i, pciid=0x%04x flags=" DEV_INFO_FOR_EACH_FLAG(PRINT_S, SEP_EMPTY), info->gen, dev_priv->dev->pdev->device, DEV_INFO_FOR_EACH_FLAG(PRINT_FLAG, SEP_COMMA)); #undef PRINT_S #undef SEP_EMPTY #undef PRINT_FLAG #undef SEP_COMMA } /* * Determine various intel_device_info fields at runtime. * * Use it when either: * - it's judged too laborious to fill n static structures with the limit * when a simple if statement does the job, * - run-time checks (eg read fuse/strap registers) are needed. * * This function needs to be called: * - after the MMIO has been setup as we are reading registers, * - after the PCH has been detected, * - before the first usage of the fields it can tweak. */ static void intel_device_info_runtime_init(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_device_info *info; enum pipe pipe; info = (struct intel_device_info *)&dev_priv->info; if (IS_VALLEYVIEW(dev)) for_each_pipe(pipe) info->num_sprites[pipe] = 2; else for_each_pipe(pipe) info->num_sprites[pipe] = 1; if (i915.disable_display) { DRM_INFO("Display disabled (module parameter)\n"); info->num_pipes = 0; } else if (info->num_pipes > 0 && (INTEL_INFO(dev)->gen == 7 || INTEL_INFO(dev)->gen == 8) && !IS_VALLEYVIEW(dev)) { u32 fuse_strap = I915_READ(FUSE_STRAP); u32 sfuse_strap = I915_READ(SFUSE_STRAP); /* * SFUSE_STRAP is supposed to have a bit signalling the display * is fused off. Unfortunately it seems that, at least in * certain cases, fused off display means that PCH display * reads don't land anywhere. In that case, we read 0s. * * On CPT/PPT, we can detect this case as SFUSE_STRAP_FUSE_LOCK * should be set when taking over after the firmware. */ if (fuse_strap & ILK_INTERNAL_DISPLAY_DISABLE || sfuse_strap & SFUSE_STRAP_DISPLAY_DISABLED || (dev_priv->pch_type == PCH_CPT && !(sfuse_strap & SFUSE_STRAP_FUSE_LOCK))) { DRM_INFO("Display fused off, disabling\n"); info->num_pipes = 0; } } } /** * i915_driver_load - setup chip and create an initial config * @dev: DRM device * @flags: startup flags * * The driver load routine has to do several things: * - drive output discovery via intel_modeset_init() * - initialize the memory manager * - allocate initial config memory * - setup the DRM framebuffer with the allocated memory */ int i915_driver_load(struct drm_device *dev, unsigned long flags) { struct drm_i915_private *dev_priv; struct intel_device_info *info, *device_info; int ret = 0, mmio_bar, mmio_size; uint32_t aperture_size; info = (struct intel_device_info *) flags; /* Refuse to load on gen6+ without kms enabled. */ if (info->gen >= 6 && !drm_core_check_feature(dev, DRIVER_MODESET)) { DRM_INFO("Your hardware requires kernel modesetting (KMS)\n"); DRM_INFO("See CONFIG_DRM_I915_KMS, nomodeset, and i915.modeset parameters\n"); return -ENODEV; } /* UMS needs agp support. */ if (!drm_core_check_feature(dev, DRIVER_MODESET) && !dev->agp) return -EINVAL; dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL); if (dev_priv == NULL) return -ENOMEM; dev->dev_private = (void *)dev_priv; dev_priv->dev = dev; /* copy initial configuration to dev_priv->info */ device_info = (struct intel_device_info *)&dev_priv->info; *device_info = *info; spin_lock_init(&dev_priv->irq_lock); spin_lock_init(&dev_priv->gpu_error.lock); spin_lock_init(&dev_priv->backlight_lock); spin_lock_init(&dev_priv->uncore.lock); spin_lock_init(&dev_priv->mm.object_stat_lock); mutex_init(&dev_priv->dpio_lock); mutex_init(&dev_priv->modeset_restore_lock); intel_pm_setup(dev); intel_display_crc_init(dev); i915_dump_device_info(dev_priv); /* Not all pre-production machines fall into this category, only the * very first ones. Almost everything should work, except for maybe * suspend/resume. And we don't implement workarounds that affect only * pre-production machines. */ if (IS_HSW_EARLY_SDV(dev)) DRM_INFO("This is an early pre-production Haswell machine. " "It may not be fully functional.\n"); if (i915_get_bridge_dev(dev)) { ret = -EIO; goto free_priv; } mmio_bar = IS_GEN2(dev) ? 1 : 0; /* Before gen4, the registers and the GTT are behind different BARs. * However, from gen4 onwards, the registers and the GTT are shared * in the same BAR, so we want to restrict this ioremap from * clobbering the GTT which we want ioremap_wc instead. Fortunately, * the register BAR remains the same size for all the earlier * generations up to Ironlake. */ if (info->gen < 5) mmio_size = 512*1024; else mmio_size = 2*1024*1024; dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, mmio_size); if (!dev_priv->regs) { DRM_ERROR("failed to map registers\n"); ret = -EIO; goto put_bridge; } /* This must be called before any calls to HAS_PCH_* */ intel_detect_pch(dev); intel_uncore_init(dev); ret = i915_gem_gtt_init(dev); if (ret) goto out_regs; if (drm_core_check_feature(dev, DRIVER_MODESET)) i915_kick_out_firmware_fb(dev_priv); pci_set_master(dev->pdev); /* overlay on gen2 is broken and can't address above 1G */ if (IS_GEN2(dev)) dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30)); /* 965GM sometimes incorrectly writes to hardware status page (HWS) * using 32bit addressing, overwriting memory if HWS is located * above 4GB. * * The documentation also mentions an issue with undefined * behaviour if any general state is accessed within a page above 4GB, * which also needs to be handled carefully. */ if (IS_BROADWATER(dev) || IS_CRESTLINE(dev)) dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32)); aperture_size = dev_priv->gtt.mappable_end; dev_priv->gtt.mappable = io_mapping_create_wc(dev_priv->gtt.mappable_base, aperture_size); if (dev_priv->gtt.mappable == NULL) { ret = -EIO; goto out_gtt; } dev_priv->gtt.mtrr = arch_phys_wc_add(dev_priv->gtt.mappable_base, aperture_size); /* The i915 workqueue is primarily used for batched retirement of * requests (and thus managing bo) once the task has been completed * by the GPU. i915_gem_retire_requests() is called directly when we * need high-priority retirement, such as waiting for an explicit * bo. * * It is also used for periodic low-priority events, such as * idle-timers and recording error state. * * All tasks on the workqueue are expected to acquire the dev mutex * so there is no point in running more than one instance of the * workqueue at any time. Use an ordered one. */ dev_priv->wq = alloc_ordered_workqueue("i915", 0); if (dev_priv->wq == NULL) { DRM_ERROR("Failed to create our workqueue.\n"); ret = -ENOMEM; goto out_mtrrfree; } intel_irq_init(dev); intel_uncore_sanitize(dev); /* Try to make sure MCHBAR is enabled before poking at it */ intel_setup_mchbar(dev); intel_setup_gmbus(dev); intel_opregion_setup(dev); intel_setup_bios(dev); i915_gem_load(dev); /* On the 945G/GM, the chipset reports the MSI capability on the * integrated graphics even though the support isn't actually there * according to the published specs. It doesn't appear to function * correctly in testing on 945G. * This may be a side effect of MSI having been made available for PEG * and the registers being closely associated. * * According to chipset errata, on the 965GM, MSI interrupts may * be lost or delayed, but we use them anyways to avoid * stuck interrupts on some machines. */ if (!IS_I945G(dev) && !IS_I945GM(dev)) pci_enable_msi(dev->pdev); intel_device_info_runtime_init(dev); if (INTEL_INFO(dev)->num_pipes) { ret = drm_vblank_init(dev, INTEL_INFO(dev)->num_pipes); if (ret) goto out_gem_unload; } intel_power_domains_init(dev_priv); if (drm_core_check_feature(dev, DRIVER_MODESET)) { ret = i915_load_modeset_init(dev); if (ret < 0) { DRM_ERROR("failed to init modeset\n"); goto out_power_well; } } else { /* Start out suspended in ums mode. */ dev_priv->ums.mm_suspended = 1; } i915_setup_sysfs(dev); if (INTEL_INFO(dev)->num_pipes) { /* Must be done after probing outputs */ intel_opregion_init(dev); acpi_video_register(); } if (IS_GEN5(dev)) intel_gpu_ips_init(dev_priv); intel_init_runtime_pm(dev_priv); return 0; out_power_well: intel_power_domains_remove(dev_priv); drm_vblank_cleanup(dev); out_gem_unload: WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier)); unregister_shrinker(&dev_priv->mm.shrinker); if (dev->pdev->msi_enabled) pci_disable_msi(dev->pdev); intel_teardown_gmbus(dev); intel_teardown_mchbar(dev); pm_qos_remove_request(&dev_priv->pm_qos); destroy_workqueue(dev_priv->wq); out_mtrrfree: arch_phys_wc_del(dev_priv->gtt.mtrr); io_mapping_free(dev_priv->gtt.mappable); out_gtt: list_del(&dev_priv->gtt.base.global_link); drm_mm_takedown(&dev_priv->gtt.base.mm); dev_priv->gtt.base.cleanup(&dev_priv->gtt.base); out_regs: intel_uncore_fini(dev); pci_iounmap(dev->pdev, dev_priv->regs); put_bridge: pci_dev_put(dev_priv->bridge_dev); free_priv: if (dev_priv->slab) kmem_cache_destroy(dev_priv->slab); kfree(dev_priv); return ret; } int i915_driver_unload(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; int ret; ret = i915_gem_suspend(dev); if (ret) { DRM_ERROR("failed to idle hardware: %d\n", ret); return ret; } intel_fini_runtime_pm(dev_priv); intel_gpu_ips_teardown(); /* The i915.ko module is still not prepared to be loaded when * the power well is not enabled, so just enable it in case * we're going to unload/reload. */ intel_display_set_init_power(dev_priv, true); intel_power_domains_remove(dev_priv); i915_teardown_sysfs(dev); WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier)); unregister_shrinker(&dev_priv->mm.shrinker); io_mapping_free(dev_priv->gtt.mappable); arch_phys_wc_del(dev_priv->gtt.mtrr); acpi_video_unregister(); if (drm_core_check_feature(dev, DRIVER_MODESET)) { intel_fbdev_fini(dev); intel_modeset_cleanup(dev); cancel_work_sync(&dev_priv->console_resume_work); /* * free the memory space allocated for the child device * config parsed from VBT */ if (dev_priv->vbt.child_dev && dev_priv->vbt.child_dev_num) { kfree(dev_priv->vbt.child_dev); dev_priv->vbt.child_dev = NULL; dev_priv->vbt.child_dev_num = 0; } vga_switcheroo_unregister_client(dev->pdev); vga_client_register(dev->pdev, NULL, NULL, NULL); } /* Free error state after interrupts are fully disabled. */ del_timer_sync(&dev_priv->gpu_error.hangcheck_timer); cancel_work_sync(&dev_priv->gpu_error.work); i915_destroy_error_state(dev); if (dev->pdev->msi_enabled) pci_disable_msi(dev->pdev); intel_opregion_fini(dev); if (drm_core_check_feature(dev, DRIVER_MODESET)) { /* Flush any outstanding unpin_work. */ flush_workqueue(dev_priv->wq); mutex_lock(&dev->struct_mutex); i915_gem_cleanup_ringbuffer(dev); i915_gem_context_fini(dev); WARN_ON(dev_priv->mm.aliasing_ppgtt); mutex_unlock(&dev->struct_mutex); i915_gem_cleanup_stolen(dev); if (!I915_NEED_GFX_HWS(dev)) i915_free_hws(dev); } list_del(&dev_priv->gtt.base.global_link); WARN_ON(!list_empty(&dev_priv->vm_list)); drm_vblank_cleanup(dev); intel_teardown_gmbus(dev); intel_teardown_mchbar(dev); destroy_workqueue(dev_priv->wq); pm_qos_remove_request(&dev_priv->pm_qos); dev_priv->gtt.base.cleanup(&dev_priv->gtt.base); intel_uncore_fini(dev); if (dev_priv->regs != NULL) pci_iounmap(dev->pdev, dev_priv->regs); if (dev_priv->slab) kmem_cache_destroy(dev_priv->slab); pci_dev_put(dev_priv->bridge_dev); kfree(dev_priv); return 0; } int i915_driver_open(struct drm_device *dev, struct drm_file *file) { int ret; ret = i915_gem_open(dev, file); if (ret) return ret; return 0; } /** * i915_driver_lastclose - clean up after all DRM clients have exited * @dev: DRM device * * Take care of cleaning up after all DRM clients have exited. In the * mode setting case, we want to restore the kernel's initial mode (just * in case the last client left us in a bad state). * * Additionally, in the non-mode setting case, we'll tear down the GTT * and DMA structures, since the kernel won't be using them, and clea * up any GEM state. */ void i915_driver_lastclose(struct drm_device * dev) { struct drm_i915_private *dev_priv = dev->dev_private; /* On gen6+ we refuse to init without kms enabled, but then the drm core * goes right around and calls lastclose. Check for this and don't clean * up anything. */ if (!dev_priv) return; if (drm_core_check_feature(dev, DRIVER_MODESET)) { intel_fbdev_restore_mode(dev); vga_switcheroo_process_delayed_switch(); return; } i915_gem_lastclose(dev); i915_dma_cleanup(dev); } void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv) { mutex_lock(&dev->struct_mutex); i915_gem_context_close(dev, file_priv); i915_gem_release(dev, file_priv); mutex_unlock(&dev->struct_mutex); } void i915_driver_postclose(struct drm_device *dev, struct drm_file *file) { struct drm_i915_file_private *file_priv = file->driver_priv; if (file_priv && file_priv->bsd_ring) file_priv->bsd_ring = NULL; kfree(file_priv); } const struct drm_ioctl_desc i915_ioctls[] = { DRM_IOCTL_DEF_DRV(I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_FLUSH, i915_flush_ioctl, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_FLIP, i915_flip_bufs, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_GETPARAM, i915_getparam, DRM_AUTH|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_ALLOC, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_FREE, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_INIT_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_DESTROY_HEAP, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_SET_VBLANK_PIPE, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_GET_VBLANK_PIPE, i915_vblank_pipe_get, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SET_CACHING, i915_gem_set_caching_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_GET_CACHING, i915_gem_get_caching_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_CREATE, i915_gem_create_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_GET_TILING, i915_gem_get_tiling, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_MADVISE, i915_gem_madvise_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, intel_sprite_get_colorkey, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), DRM_IOCTL_DEF_DRV(I915_GEM_WAIT, i915_gem_wait_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE, i915_gem_context_create_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY, i915_gem_context_destroy_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATS, i915_get_reset_stats_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_USERPTR, i915_gem_userptr_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW), }; int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls); /* * This is really ugly: Because old userspace abused the linux agp interface to * manage the gtt, we need to claim that all intel devices are agp. For * otherwise the drm core refuses to initialize the agp support code. */ int i915_driver_device_is_agp(struct drm_device * dev) { return 1; }