371 lines
8.2 KiB
C
371 lines
8.2 KiB
C
/*
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* Copyright 2010 Matt Turner.
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* Copyright 2012 Red Hat
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License version 2. See the file COPYING in the main
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* directory of this archive for more details.
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*
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* Authors: Matthew Garrett
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* Matt Turner
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* Dave Airlie
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*/
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#include <drm/drmP.h>
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#include <drm/drm_crtc_helper.h>
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#include "mgag200_drv.h"
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static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb)
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{
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struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb);
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if (mga_fb->obj)
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drm_gem_object_unreference_unlocked(mga_fb->obj);
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drm_framebuffer_cleanup(fb);
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kfree(fb);
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}
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static const struct drm_framebuffer_funcs mga_fb_funcs = {
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.destroy = mga_user_framebuffer_destroy,
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};
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int mgag200_framebuffer_init(struct drm_device *dev,
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struct mga_framebuffer *gfb,
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const struct drm_mode_fb_cmd2 *mode_cmd,
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struct drm_gem_object *obj)
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{
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int ret;
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drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
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gfb->obj = obj;
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ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
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if (ret) {
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DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static struct drm_framebuffer *
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mgag200_user_framebuffer_create(struct drm_device *dev,
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struct drm_file *filp,
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const struct drm_mode_fb_cmd2 *mode_cmd)
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{
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struct drm_gem_object *obj;
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struct mga_framebuffer *mga_fb;
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int ret;
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obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
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if (obj == NULL)
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return ERR_PTR(-ENOENT);
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mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL);
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if (!mga_fb) {
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drm_gem_object_unreference_unlocked(obj);
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return ERR_PTR(-ENOMEM);
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}
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ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj);
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if (ret) {
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drm_gem_object_unreference_unlocked(obj);
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kfree(mga_fb);
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return ERR_PTR(ret);
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}
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return &mga_fb->base;
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}
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static const struct drm_mode_config_funcs mga_mode_funcs = {
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.fb_create = mgag200_user_framebuffer_create,
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};
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static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem)
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{
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int offset;
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int orig;
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int test1, test2;
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int orig1, orig2;
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unsigned int vram_size;
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/* Probe */
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orig = ioread16(mem);
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iowrite16(0, mem);
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vram_size = mdev->mc.vram_window;
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if ((mdev->type == G200_EW3) && (vram_size >= 0x1000000)) {
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vram_size = vram_size - 0x400000;
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}
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for (offset = 0x100000; offset < vram_size; offset += 0x4000) {
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orig1 = ioread8(mem + offset);
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orig2 = ioread8(mem + offset + 0x100);
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iowrite16(0xaa55, mem + offset);
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iowrite16(0xaa55, mem + offset + 0x100);
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test1 = ioread16(mem + offset);
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test2 = ioread16(mem);
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iowrite16(orig1, mem + offset);
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iowrite16(orig2, mem + offset + 0x100);
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if (test1 != 0xaa55) {
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break;
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}
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if (test2) {
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break;
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}
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}
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iowrite16(orig, mem);
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return offset - 65536;
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}
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/* Map the framebuffer from the card and configure the core */
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static int mga_vram_init(struct mga_device *mdev)
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{
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void __iomem *mem;
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struct apertures_struct *aper = alloc_apertures(1);
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if (!aper)
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return -ENOMEM;
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/* BAR 0 is VRAM */
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mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
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mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);
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aper->ranges[0].base = mdev->mc.vram_base;
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aper->ranges[0].size = mdev->mc.vram_window;
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remove_conflicting_framebuffers(aper, "mgafb", true);
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kfree(aper);
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if (!devm_request_mem_region(mdev->dev->dev, mdev->mc.vram_base, mdev->mc.vram_window,
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"mgadrmfb_vram")) {
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DRM_ERROR("can't reserve VRAM\n");
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return -ENXIO;
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}
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mem = pci_iomap(mdev->dev->pdev, 0, 0);
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mdev->mc.vram_size = mga_probe_vram(mdev, mem);
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pci_iounmap(mdev->dev->pdev, mem);
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return 0;
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}
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static int mgag200_device_init(struct drm_device *dev,
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uint32_t flags)
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{
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struct mga_device *mdev = dev->dev_private;
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int ret, option;
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mdev->type = flags;
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/* Hardcode the number of CRTCs to 1 */
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mdev->num_crtc = 1;
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pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
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mdev->has_sdram = !(option & (1 << 14));
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/* BAR 0 is the framebuffer, BAR 1 contains registers */
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mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
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mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);
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if (!devm_request_mem_region(mdev->dev->dev, mdev->rmmio_base, mdev->rmmio_size,
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"mgadrmfb_mmio")) {
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DRM_ERROR("can't reserve mmio registers\n");
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return -ENOMEM;
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}
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mdev->rmmio = pcim_iomap(dev->pdev, 1, 0);
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if (mdev->rmmio == NULL)
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return -ENOMEM;
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/* stash G200 SE model number for later use */
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if (IS_G200_SE(mdev))
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mdev->unique_rev_id = RREG32(0x1e24);
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ret = mga_vram_init(mdev);
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if (ret)
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return ret;
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mdev->bpp_shifts[0] = 0;
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mdev->bpp_shifts[1] = 1;
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mdev->bpp_shifts[2] = 0;
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mdev->bpp_shifts[3] = 2;
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return 0;
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}
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/*
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* Functions here will be called by the core once it's bound the driver to
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* a PCI device
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*/
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int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
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{
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struct mga_device *mdev;
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int r;
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mdev = devm_kzalloc(dev->dev, sizeof(struct mga_device), GFP_KERNEL);
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if (mdev == NULL)
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return -ENOMEM;
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dev->dev_private = (void *)mdev;
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mdev->dev = dev;
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r = mgag200_device_init(dev, flags);
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if (r) {
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dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
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return r;
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}
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r = mgag200_mm_init(mdev);
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if (r)
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goto err_mm;
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drm_mode_config_init(dev);
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dev->mode_config.funcs = (void *)&mga_mode_funcs;
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if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
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dev->mode_config.preferred_depth = 16;
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else
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dev->mode_config.preferred_depth = 24;
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dev->mode_config.prefer_shadow = 1;
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r = mgag200_modeset_init(mdev);
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if (r) {
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dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
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goto err_modeset;
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}
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/* Make small buffers to store a hardware cursor (double buffered icon updates) */
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mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
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&mdev->cursor.pixels_1);
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mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
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&mdev->cursor.pixels_2);
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if (!mdev->cursor.pixels_2 || !mdev->cursor.pixels_1) {
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mdev->cursor.pixels_1 = NULL;
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mdev->cursor.pixels_2 = NULL;
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dev_warn(&dev->pdev->dev,
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"Could not allocate space for cursors. Not doing hardware cursors.\n");
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} else {
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mdev->cursor.pixels_current = mdev->cursor.pixels_1;
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mdev->cursor.pixels_prev = mdev->cursor.pixels_2;
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}
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return 0;
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err_modeset:
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drm_mode_config_cleanup(dev);
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mgag200_mm_fini(mdev);
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err_mm:
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dev->dev_private = NULL;
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return r;
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}
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int mgag200_driver_unload(struct drm_device *dev)
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{
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struct mga_device *mdev = dev->dev_private;
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if (mdev == NULL)
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return 0;
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mgag200_modeset_fini(mdev);
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mgag200_fbdev_fini(mdev);
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drm_mode_config_cleanup(dev);
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mgag200_mm_fini(mdev);
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dev->dev_private = NULL;
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return 0;
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}
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int mgag200_gem_create(struct drm_device *dev,
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u32 size, bool iskernel,
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struct drm_gem_object **obj)
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{
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struct mgag200_bo *astbo;
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int ret;
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*obj = NULL;
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size = roundup(size, PAGE_SIZE);
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if (size == 0)
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return -EINVAL;
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ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
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if (ret) {
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if (ret != -ERESTARTSYS)
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DRM_ERROR("failed to allocate GEM object\n");
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return ret;
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}
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*obj = &astbo->gem;
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return 0;
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}
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int mgag200_dumb_create(struct drm_file *file,
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struct drm_device *dev,
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struct drm_mode_create_dumb *args)
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{
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int ret;
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struct drm_gem_object *gobj;
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u32 handle;
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args->pitch = args->width * ((args->bpp + 7) / 8);
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args->size = args->pitch * args->height;
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ret = mgag200_gem_create(dev, args->size, false,
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&gobj);
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if (ret)
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return ret;
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ret = drm_gem_handle_create(file, gobj, &handle);
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drm_gem_object_unreference_unlocked(gobj);
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if (ret)
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return ret;
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args->handle = handle;
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return 0;
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}
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static void mgag200_bo_unref(struct mgag200_bo **bo)
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{
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struct ttm_buffer_object *tbo;
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if ((*bo) == NULL)
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return;
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tbo = &((*bo)->bo);
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ttm_bo_unref(&tbo);
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*bo = NULL;
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}
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void mgag200_gem_free_object(struct drm_gem_object *obj)
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{
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struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);
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mgag200_bo_unref(&mgag200_bo);
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}
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static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
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{
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return drm_vma_node_offset_addr(&bo->bo.vma_node);
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}
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int
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mgag200_dumb_mmap_offset(struct drm_file *file,
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struct drm_device *dev,
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uint32_t handle,
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uint64_t *offset)
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{
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struct drm_gem_object *obj;
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struct mgag200_bo *bo;
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obj = drm_gem_object_lookup(file, handle);
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if (obj == NULL)
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return -ENOENT;
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bo = gem_to_mga_bo(obj);
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*offset = mgag200_bo_mmap_offset(bo);
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drm_gem_object_unreference_unlocked(obj);
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return 0;
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}
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