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linux_dsm_epyc7002/drivers/gpu/drm/i915/i915_dma.c
Paulo Zanoni a8a8bd547e drm/i915: make PC8 be part of runtime PM suspend/resume 
Currently, when our driver becomes idle for i915.pc8_timeout (default:
5s) we enable PC8, so we save some power, but not everything we can.
Then, while PC8 is enabled, if we stay idle for more
autosuspend_delay_ms (default: 10s) we'll enter runtime PM and put the
graphics device in D3 state, saving even more power. The two features
are separate things with increasing levels of power savings, but if we
disable PC8 we'll never get into D3.

While from the modularity point of view it would be nice to keep these
features as separate, we have reasons to merge them:
 - We are not aware of anybody wanting a "PC8 without D3" environment.
 - If we keep both features as separate, we'll have to to test both
   PC8 and PC8+D3 code paths. We're already having a major pain to
   make QA do automated testing of just one thing, testing both paths
   will cost even more.
 - Only Haswell+ supports PC8, so if we want to add runtime PM support
   to, for example, IVB, we'll have to copy some code from the PC8
   feature to runtime PM, so merging both features as a single thing
   will make it easier for enabling runtime PM on other platforms.

This patch only does the very basic steps required to have PC8 and
runtime PM merged on a single feature: the next patches will take care
of cleaning up everything.

v2: - Rebase.
v3: - Rebase.
    - Fully remove the deprecated i915 params since Daniel doesn't
      consider them as part of the ABI.
v4: - Rebase.
    - Fix typo in the commit message.
v5: - Rebase, again.
    - Add a huge comment explaining the different forcewake usage
      (Chris, Daniel).
    - Use open-coded forcewake functions (Daniel).

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-03-19 16:38:25 +01:00

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/* 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 <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>
#include "intel_drv.h"
#include <drm/i915_drm.h>
#include "i915_drv.h"
#include "i915_trace.h"
#include <linux/pci.h>
#include <linux/vgaarb.h>
#include <linux/acpi.h>
#include <linux/pnp.h>
#include <linux/vga_switcheroo.h>
#include <linux/slab.h>
#include <acpi/video.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#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)->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)
{
drm_i915_private_t *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)
{
drm_i915_private_t *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)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_ring_buffer *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)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_i915_master_private *master_priv;
struct intel_ring_buffer *ring = LP_RING(dev_priv);
/*
* 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;
ring->head = I915_READ_HEAD(ring) & HEAD_ADDR;
ring->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
ring->space = ring->head - (ring->tail + I915_RING_FREE_SPACE);
if (ring->space < 0)
ring->space += ring->size;
if (!dev->primary->master)
return;
master_priv = dev->primary->master->driver_priv;
if (ring->head == ring->tail && master_priv->sarea_priv)
master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
}
static int i915_dma_cleanup(struct drm_device * dev)
{
drm_i915_private_t *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)
{
drm_i915_private_t *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)->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)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
struct intel_ring_buffer *ring = LP_RING(dev_priv);
DRM_DEBUG_DRIVER("%s\n", __func__);
if (ring->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)
{
drm_i915_private_t *dev_priv = dev->dev_private;
int i, ret;
if ((dwords+1) * sizeof(int) >= LP_RING(dev_priv)->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)
{
drm_i915_private_t *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)
{
drm_i915_private_t *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)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) 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)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) 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)
{
drm_i915_private_t *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)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv;
int ret = 0;
struct intel_ring_buffer *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)
{
drm_i915_private_t *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)->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)
{
drm_i915_private_t *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)
{
drm_i915_private_t *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)
{
drm_i915_private_t *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;
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)
{
drm_i915_private_t *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)
{
drm_i915_private_t *dev_priv = dev->dev_private;
drm_i915_hws_addr_t *hws = data;
struct intel_ring_buffer *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)
{
drm_i915_private_t *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)
{
drm_i915_private_t *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)
{
drm_i915_private_t *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);
bool can_switch;
spin_lock(&dev->count_lock);
can_switch = (dev->open_count == 0);
spin_unlock(&dev->count_lock);
return can_switch;
}
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);
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_power;
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) {
intel_display_power_put(dev_priv, POWER_DOMAIN_VGA);
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_power:
intel_display_power_put(dev_priv, POWER_DOMAIN_VGA);
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:
if (dev_priv->mm.inactive_shrinker.scan_objects)
unregister_shrinker(&dev_priv->mm.inactive_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);
if (dev_priv->mm.inactive_shrinker.scan_objects)
unregister_shrinker(&dev_priv->mm.inactive_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_free_all_phys_object(dev);
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->dev_private);
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)
{
drm_i915_private_t *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;
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),
};
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;
}
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