linux/drivers/gpu/drm/mgag200/mgag200_main.c
Julia Lemire abbee62387 drm/mgag200: Added resolution and bandwidth limits for various G200e products.
At the larger resolutions, the g200e series sometimes struggles with
maintaining a proper output.  Problems like flickering or black bands appearing
on screen can occur.  In order to avoid this, limitations regarding resolutions
and bandwidth have been added for the different variations of the g200e series.
This code was ported from the old xorg mga driver.

Signed-off-by: Julia Lemire <jlemire@matrox.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-06-28 08:45:09 +10:00

382 lines
8.3 KiB
C

/*
* Copyright 2010 Matt Turner.
* Copyright 2012 Red Hat
*
* This file is subject to the terms and conditions of the GNU General
* Public License version 2. See the file COPYING in the main
* directory of this archive for more details.
*
* Authors: Matthew Garrett
* Matt Turner
* Dave Airlie
*/
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include "mgag200_drv.h"
static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb);
if (mga_fb->obj)
drm_gem_object_unreference_unlocked(mga_fb->obj);
drm_framebuffer_cleanup(fb);
kfree(fb);
}
static const struct drm_framebuffer_funcs mga_fb_funcs = {
.destroy = mga_user_framebuffer_destroy,
};
int mgag200_framebuffer_init(struct drm_device *dev,
struct mga_framebuffer *gfb,
struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_object *obj)
{
int ret;
drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
gfb->obj = obj;
ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
if (ret) {
DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
return ret;
}
return 0;
}
static struct drm_framebuffer *
mgag200_user_framebuffer_create(struct drm_device *dev,
struct drm_file *filp,
struct drm_mode_fb_cmd2 *mode_cmd)
{
struct drm_gem_object *obj;
struct mga_framebuffer *mga_fb;
int ret;
obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
if (obj == NULL)
return ERR_PTR(-ENOENT);
mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL);
if (!mga_fb) {
drm_gem_object_unreference_unlocked(obj);
return ERR_PTR(-ENOMEM);
}
ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj);
if (ret) {
drm_gem_object_unreference_unlocked(obj);
kfree(mga_fb);
return ERR_PTR(ret);
}
return &mga_fb->base;
}
static const struct drm_mode_config_funcs mga_mode_funcs = {
.fb_create = mgag200_user_framebuffer_create,
};
static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem)
{
int offset;
int orig;
int test1, test2;
int orig1, orig2;
/* Probe */
orig = ioread16(mem);
iowrite16(0, mem);
for (offset = 0x100000; offset < mdev->mc.vram_window; offset += 0x4000) {
orig1 = ioread8(mem + offset);
orig2 = ioread8(mem + offset + 0x100);
iowrite16(0xaa55, mem + offset);
iowrite16(0xaa55, mem + offset + 0x100);
test1 = ioread16(mem + offset);
test2 = ioread16(mem);
iowrite16(orig1, mem + offset);
iowrite16(orig2, mem + offset + 0x100);
if (test1 != 0xaa55) {
break;
}
if (test2) {
break;
}
}
iowrite16(orig, mem);
return offset - 65536;
}
/* Map the framebuffer from the card and configure the core */
static int mga_vram_init(struct mga_device *mdev)
{
void __iomem *mem;
struct apertures_struct *aper = alloc_apertures(1);
if (!aper)
return -ENOMEM;
/* BAR 0 is VRAM */
mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);
aper->ranges[0].base = mdev->mc.vram_base;
aper->ranges[0].size = mdev->mc.vram_window;
remove_conflicting_framebuffers(aper, "mgafb", true);
kfree(aper);
if (!devm_request_mem_region(mdev->dev->dev, mdev->mc.vram_base, mdev->mc.vram_window,
"mgadrmfb_vram")) {
DRM_ERROR("can't reserve VRAM\n");
return -ENXIO;
}
mem = pci_iomap(mdev->dev->pdev, 0, 0);
mdev->mc.vram_size = mga_probe_vram(mdev, mem);
pci_iounmap(mdev->dev->pdev, mem);
return 0;
}
static int mgag200_device_init(struct drm_device *dev,
uint32_t flags)
{
struct mga_device *mdev = dev->dev_private;
int ret, option;
mdev->type = flags;
/* Hardcode the number of CRTCs to 1 */
mdev->num_crtc = 1;
pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
mdev->has_sdram = !(option & (1 << 14));
/* BAR 0 is the framebuffer, BAR 1 contains registers */
mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);
if (!devm_request_mem_region(mdev->dev->dev, mdev->rmmio_base, mdev->rmmio_size,
"mgadrmfb_mmio")) {
DRM_ERROR("can't reserve mmio registers\n");
return -ENOMEM;
}
mdev->rmmio = pcim_iomap(dev->pdev, 1, 0);
if (mdev->rmmio == NULL)
return -ENOMEM;
/* stash G200 SE model number for later use */
if (IS_G200_SE(mdev))
mdev->unique_rev_id = RREG32(0x1e24);
ret = mga_vram_init(mdev);
if (ret)
return ret;
mdev->bpp_shifts[0] = 0;
mdev->bpp_shifts[1] = 1;
mdev->bpp_shifts[2] = 0;
mdev->bpp_shifts[3] = 2;
return 0;
}
/*
* Functions here will be called by the core once it's bound the driver to
* a PCI device
*/
int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
{
struct mga_device *mdev;
int r;
mdev = devm_kzalloc(dev->dev, sizeof(struct mga_device), GFP_KERNEL);
if (mdev == NULL)
return -ENOMEM;
dev->dev_private = (void *)mdev;
mdev->dev = dev;
r = mgag200_device_init(dev, flags);
if (r) {
dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
return r;
}
r = mgag200_mm_init(mdev);
if (r)
goto out;
drm_mode_config_init(dev);
dev->mode_config.funcs = (void *)&mga_mode_funcs;
dev->mode_config.preferred_depth = 24;
dev->mode_config.prefer_shadow = 1;
r = mgag200_modeset_init(mdev);
if (r) {
dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
goto out;
}
/* Make small buffers to store a hardware cursor (double buffered icon updates) */
mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
&mdev->cursor.pixels_1);
mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
&mdev->cursor.pixels_2);
if (!mdev->cursor.pixels_2 || !mdev->cursor.pixels_1)
goto cursor_nospace;
mdev->cursor.pixels_current = mdev->cursor.pixels_1;
mdev->cursor.pixels_prev = mdev->cursor.pixels_2;
goto cursor_done;
cursor_nospace:
mdev->cursor.pixels_1 = NULL;
mdev->cursor.pixels_2 = NULL;
dev_warn(&dev->pdev->dev, "Could not allocate space for cursors. Not doing hardware cursors.\n");
cursor_done:
out:
if (r)
mgag200_driver_unload(dev);
return r;
}
int mgag200_driver_unload(struct drm_device *dev)
{
struct mga_device *mdev = dev->dev_private;
if (mdev == NULL)
return 0;
mgag200_modeset_fini(mdev);
mgag200_fbdev_fini(mdev);
drm_mode_config_cleanup(dev);
mgag200_mm_fini(mdev);
dev->dev_private = NULL;
return 0;
}
int mgag200_gem_create(struct drm_device *dev,
u32 size, bool iskernel,
struct drm_gem_object **obj)
{
struct mgag200_bo *astbo;
int ret;
*obj = NULL;
size = roundup(size, PAGE_SIZE);
if (size == 0)
return -EINVAL;
ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
if (ret) {
if (ret != -ERESTARTSYS)
DRM_ERROR("failed to allocate GEM object\n");
return ret;
}
*obj = &astbo->gem;
return 0;
}
int mgag200_dumb_create(struct drm_file *file,
struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
int ret;
struct drm_gem_object *gobj;
u32 handle;
args->pitch = args->width * ((args->bpp + 7) / 8);
args->size = args->pitch * args->height;
ret = mgag200_gem_create(dev, args->size, false,
&gobj);
if (ret)
return ret;
ret = drm_gem_handle_create(file, gobj, &handle);
drm_gem_object_unreference_unlocked(gobj);
if (ret)
return ret;
args->handle = handle;
return 0;
}
int mgag200_dumb_destroy(struct drm_file *file,
struct drm_device *dev,
uint32_t handle)
{
return drm_gem_handle_delete(file, handle);
}
int mgag200_gem_init_object(struct drm_gem_object *obj)
{
BUG();
return 0;
}
void mgag200_bo_unref(struct mgag200_bo **bo)
{
struct ttm_buffer_object *tbo;
if ((*bo) == NULL)
return;
tbo = &((*bo)->bo);
ttm_bo_unref(&tbo);
if (tbo == NULL)
*bo = NULL;
}
void mgag200_gem_free_object(struct drm_gem_object *obj)
{
struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);
if (!mgag200_bo)
return;
mgag200_bo_unref(&mgag200_bo);
}
static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
{
return bo->bo.addr_space_offset;
}
int
mgag200_dumb_mmap_offset(struct drm_file *file,
struct drm_device *dev,
uint32_t handle,
uint64_t *offset)
{
struct drm_gem_object *obj;
int ret;
struct mgag200_bo *bo;
mutex_lock(&dev->struct_mutex);
obj = drm_gem_object_lookup(dev, file, handle);
if (obj == NULL) {
ret = -ENOENT;
goto out_unlock;
}
bo = gem_to_mga_bo(obj);
*offset = mgag200_bo_mmap_offset(bo);
drm_gem_object_unreference(obj);
ret = 0;
out_unlock:
mutex_unlock(&dev->struct_mutex);
return ret;
}