litmus-rt.git - The LITMUS^RT kernel.

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author	Stefano Stabellini <stefano.stabellini@eu.citrix.com>	2010-07-21 13:32:37 -0400
committer	Thomas Gleixner <tglx@linutronix.de>	2010-07-23 06:53:00 -0400
commit	ff4878089e1eaeac79d57878ad4ea32910fb4037 (patch)
tree	0e2f78629117a2ca1eff77c673ce364bb4cc32a6 /kernel/range.c
parent	087b255a2b43f417af83cb44e0bb02507f36b7fe (diff)

x86: Do not try to disable hpet if it hasn't been initialized before

hpet_disable is called unconditionally on machine reboot if hpet support is compiled in the kernel. hpet_disable only checks if the machine is hpet capable but doesn't make sure that hpet has been initialized. [ tglx: Made it a one liner and removed the redundant hpet_address check ] Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Venkatesh Pallipadi <venki@google.com> LKML-Reference: <alpine.DEB.2.00.1007211726240.22235@kaball-desktop> Cc: stable@kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Diffstat (limited to 'kernel/range.c')

0 files changed, 0 insertions, 0 deletions

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/* * Copyright 2012 Red Hat Inc. * * 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 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 * THE COPYRIGHT HOLDERS, AUTHORS 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. * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * */ /* * Authors: Dave Airlie <airlied@redhat.com> */ #include <drm/drmP.h> #include "ast_drv.h" #include <drm/drm_fb_helper.h> #include <drm/drm_crtc_helper.h> #include "ast_dram_tables.h" void ast_set_index_reg_mask(struct ast_private *ast, uint32_t base, uint8_t index, uint8_t mask, uint8_t val) { u8 tmp; ast_io_write8(ast, base, index); tmp = (ast_io_read8(ast, base + 1) & mask) | val; ast_set_index_reg(ast, base, index, tmp); } uint8_t ast_get_index_reg(struct ast_private *ast, uint32_t base, uint8_t index) { uint8_t ret; ast_io_write8(ast, base, index); ret = ast_io_read8(ast, base + 1); return ret; } uint8_t ast_get_index_reg_mask(struct ast_private *ast, uint32_t base, uint8_t index, uint8_t mask) { uint8_t ret; ast_io_write8(ast, base, index); ret = ast_io_read8(ast, base + 1) & mask; return ret; } static int ast_detect_chip(struct drm_device *dev) { struct ast_private *ast = dev->dev_private; if (dev->pdev->device == PCI_CHIP_AST1180) { ast->chip = AST1100; DRM_INFO("AST 1180 detected\n"); } else { if (dev->pdev->revision >= 0x20) { ast->chip = AST2300; DRM_INFO("AST 2300 detected\n"); } else if (dev->pdev->revision >= 0x10) { uint32_t data; ast_write32(ast, 0xf004, 0x1e6e0000); ast_write32(ast, 0xf000, 0x1); data = ast_read32(ast, 0x1207c); switch (data & 0x0300) { case 0x0200: ast->chip = AST1100; DRM_INFO("AST 1100 detected\n"); break; case 0x0100: ast->chip = AST2200; DRM_INFO("AST 2200 detected\n"); break; case 0x0000: ast->chip = AST2150; DRM_INFO("AST 2150 detected\n"); break; default: ast->chip = AST2100; DRM_INFO("AST 2100 detected\n"); break; } ast->vga2_clone = false; } else { ast->chip = 2000; DRM_INFO("AST 2000 detected\n"); } } return 0; } static int ast_get_dram_info(struct drm_device *dev) { struct ast_private *ast = dev->dev_private; uint32_t data, data2; uint32_t denum, num, div, ref_pll; ast_write32(ast, 0xf004, 0x1e6e0000); ast_write32(ast, 0xf000, 0x1); ast_write32(ast, 0x10000, 0xfc600309); do { ; } while (ast_read32(ast, 0x10000) != 0x01); data = ast_read32(ast, 0x10004); if (data & 0x400) ast->dram_bus_width = 16; else ast->dram_bus_width = 32; if (ast->chip == AST2300) { switch (data & 0x03) { case 0: ast->dram_type = AST_DRAM_512Mx16; break; default: case 1: ast->dram_type = AST_DRAM_1Gx16; break; case 2: ast->dram_type = AST_DRAM_2Gx16; break; case 3: ast->dram_type = AST_DRAM_4Gx16; break; } } else { switch (data & 0x0c) { case 0: case 4: ast->dram_type = AST_DRAM_512Mx16; break; case 8: if (data & 0x40) ast->dram_type = AST_DRAM_1Gx16; else ast->dram_type = AST_DRAM_512Mx32; break; case 0xc: ast->dram_type = AST_DRAM_1Gx32; break; } } data = ast_read32(ast, 0x10120); data2 = ast_read32(ast, 0x10170); if (data2 & 0x2000) ref_pll = 14318; else ref_pll = 12000; denum = data & 0x1f; num = (data & 0x3fe0) >> 5; data = (data & 0xc000) >> 14; switch (data) { case 3: div = 0x4; break; case 2: case 1: div = 0x2; break; default: div = 0x1; break; } ast->mclk = ref_pll * (num + 2) / (denum + 2) * (div * 1000); return 0; } uint32_t ast_get_max_dclk(struct drm_device *dev, int bpp) { struct ast_private *ast = dev->dev_private; uint32_t dclk, jreg; uint32_t dram_bus_width, mclk, dram_bandwidth, actual_dram_bandwidth, dram_efficency = 500; dram_bus_width = ast->dram_bus_width; mclk = ast->mclk; if (ast->chip == AST2100 || ast->chip == AST1100 || ast->chip == AST2200 || ast->chip == AST2150 || ast->dram_bus_width == 16) dram_efficency = 600; else if (ast->chip == AST2300) dram_efficency = 400; dram_bandwidth = mclk * dram_bus_width * 2 / 8; actual_dram_bandwidth = dram_bandwidth * dram_efficency / 1000; if (ast->chip == AST1180) dclk = actual_dram_bandwidth / ((bpp + 1) / 8); else { jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff); if ((jreg & 0x08) && (ast->chip == AST2000)) dclk = actual_dram_bandwidth / ((bpp + 1 + 16) / 8); else if ((jreg & 0x08) && (bpp == 8)) dclk = actual_dram_bandwidth / ((bpp + 1 + 24) / 8); else dclk = actual_dram_bandwidth / ((bpp + 1) / 8); } if (ast->chip == AST2100 || ast->chip == AST2200 || ast->chip == AST2300 || ast->chip == AST1180) { if (dclk > 200) dclk = 200; } else { if (dclk > 165) dclk = 165; } return dclk; } static void ast_user_framebuffer_destroy(struct drm_framebuffer *fb) { struct ast_framebuffer *ast_fb = to_ast_framebuffer(fb); if (ast_fb->obj) drm_gem_object_unreference_unlocked(ast_fb->obj); drm_framebuffer_cleanup(fb); kfree(fb); } static const struct drm_framebuffer_funcs ast_fb_funcs = { .destroy = ast_user_framebuffer_destroy, }; int ast_framebuffer_init(struct drm_device *dev, struct ast_framebuffer *ast_fb, struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object *obj) { int ret; drm_helper_mode_fill_fb_struct(&ast_fb->base, mode_cmd); ast_fb->obj = obj; ret = drm_framebuffer_init(dev, &ast_fb->base, &ast_fb_funcs); if (ret) { DRM_ERROR("framebuffer init failed %d\n", ret); return ret; } return 0; } static struct drm_framebuffer * ast_user_framebuffer_create(struct drm_device *dev, struct drm_file *filp, struct drm_mode_fb_cmd2 *mode_cmd) { struct drm_gem_object *obj; struct ast_framebuffer *ast_fb; int ret; obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]); if (obj == NULL) return ERR_PTR(-ENOENT); ast_fb = kzalloc(sizeof(*ast_fb), GFP_KERNEL); if (!ast_fb) { drm_gem_object_unreference_unlocked(obj); return ERR_PTR(-ENOMEM); } ret = ast_framebuffer_init(dev, ast_fb, mode_cmd, obj); if (ret) { drm_gem_object_unreference_unlocked(obj); kfree(ast_fb); return ERR_PTR(ret); } return &ast_fb->base; } static const struct drm_mode_config_funcs ast_mode_funcs = { .fb_create = ast_user_framebuffer_create, }; static u32 ast_get_vram_info(struct drm_device *dev) { struct ast_private *ast = dev->dev_private; u8 jreg; ast_open_key(ast); jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xaa, 0xff); switch (jreg & 3) { case 0: return AST_VIDMEM_SIZE_8M; case 1: return AST_VIDMEM_SIZE_16M; case 2: return AST_VIDMEM_SIZE_32M; case 3: return AST_VIDMEM_SIZE_64M; } return AST_VIDMEM_DEFAULT_SIZE; } int ast_driver_load(struct drm_device *dev, unsigned long flags) { struct ast_private *ast; int ret = 0; ast = kzalloc(sizeof(struct ast_private), GFP_KERNEL); if (!ast) return -ENOMEM; dev->dev_private = ast; ast->dev = dev; ast->regs = pci_iomap(dev->pdev, 1, 0); if (!ast->regs) { ret = -EIO; goto out_free; } ast->ioregs = pci_iomap(dev->pdev, 2, 0); if (!ast->ioregs) { ret = -EIO; goto out_free; } ast_detect_chip(dev); if (ast->chip != AST1180) { ast_get_dram_info(dev); ast->vram_size = ast_get_vram_info(dev); DRM_INFO("dram %d %d %d %08x\n", ast->mclk, ast->dram_type, ast->dram_bus_width, ast->vram_size); } ret = ast_mm_init(ast); if (ret) goto out_free; drm_mode_config_init(dev); dev->mode_config.funcs = (void *)&ast_mode_funcs; dev->mode_config.min_width = 0; dev->mode_config.min_height = 0; dev->mode_config.preferred_depth = 24; dev->mode_config.prefer_shadow = 1; if (ast->chip == AST2100 || ast->chip == AST2200 || ast->chip == AST2300 || ast->chip == AST1180) { dev->mode_config.max_width = 1920; dev->mode_config.max_height = 2048; } else { dev->mode_config.max_width = 1600; dev->mode_config.max_height = 1200; } ret = ast_mode_init(dev); if (ret) goto out_free; ret = ast_fbdev_init(dev); if (ret) goto out_free; return 0; out_free: kfree(ast); dev->dev_private = NULL; return ret; } int ast_driver_unload(struct drm_device *dev) { struct ast_private *ast = dev->dev_private; ast_mode_fini(dev); ast_fbdev_fini(dev); drm_mode_config_cleanup(dev); ast_mm_fini(ast); pci_iounmap(dev->pdev, ast->ioregs); pci_iounmap(dev->pdev, ast->regs); kfree(ast); return 0; } int ast_gem_create(struct drm_device *dev, u32 size, bool iskernel, struct drm_gem_object **obj) { struct ast_bo *astbo; int ret; *obj = NULL; size = roundup(size, PAGE_SIZE); if (size == 0) return -EINVAL; ret = ast_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 ast_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 = ast_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; } void ast_bo_unref(struct ast_bo **bo) { struct ttm_buffer_object *tbo; if ((*bo) == NULL) return; tbo = &((*bo)->bo); ttm_bo_unref(&tbo); if (tbo == NULL) *bo = NULL; } void ast_gem_free_object(struct drm_gem_object *obj) { struct ast_bo *ast_bo = gem_to_ast_bo(obj); if (!ast_bo) return; ast_bo_unref(&ast_bo); } static inline u64 ast_bo_mmap_offset(struct ast_bo *bo) { return drm_vma_node_offset_addr(&bo->bo.vma_node); } int ast_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 ast_bo *bo;


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