diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-22 13:08:22 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-22 13:08:22 -0700 |
commit | be53bfdb8088e9d1924199cc1a96e113756b1075 (patch) | |
tree | 8c65eb9d82ca4c0f11c17cfdc44d5263820b415b /drivers/gpu/drm/exynos/exynos_drm_buf.c | |
parent | b2094ef840697bc8ca5d17a83b7e30fad5f1e9fa (diff) | |
parent | 5466c7b1683a23dbbcfb7ee4a71c4f23886001c7 (diff) |
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
Pull drm main changes from Dave Airlie:
"This is the main drm pull request, I'm probably going to send two more
smaller ones, will explain below.
This contains a patch that is also in the fbdev tree, but it should be
the same patch, it added an API for hot unplugging framebuffer
devices, and I need that API for a new driver.
It also contains some changes to the i2c tree which Jean has acked,
and one change to moorestown platform stuff in x86.
Highlights:
- new drivers: UDL driver for USB displaylink devices, kms only,
should support correct hotplug operations.
- core: i2c speedups + better hotplug support, EDID overriding via
firmware interface - allows user to load a firmware for a broken
monitor/kvm from userspace, it even has documentation for it.
- exynos: new HDMI audio + hdmi 1.4 + virtual output driver
- gma500: code cleanup
- radeon: cleanups, CS optimisations, streamout support and pageflip
fix
- nouveau: NVD9 displayport support + more reclocking work
- i915: re-enabling GMBUS, finish gpu patch (might help hibernation
who knows), missed irq fixes, stencil tiling fixes, interlaced
support, aliasesd PPGTT support for SNB/IVB, swizzling for SNB/IVB,
semaphore fixes
As well as the usual bunch of cleanups and fixes all over the place.
I've got two things I'd like to merge a bit later:
a) AMD support for all their new radeonhd 7000 series GPU and APUs.
AMD dropped this a bit late due to insane internal review
processes, (please AMD just follow Intel and let open source guys
ship stuff early) however I don't want to penalise people who own
this hardware (since its been on sale for 3-4 months and GPU hw
doesn't exactly have a lifetime in years) and consign them to
using closed drivers for longer than necessary. The changes are
well contained and just plug into the driver new gpu functionality
so they should be fairly regression proof. I just want to give
them a bit of a run on the hw AMD kindly sent me.
b) drm prime/dma-buf interface code. This is just infrastructure
code to expose the dma-buf stuff to drm drivers and to userspace.
I'm not planning on pushing any driver support in this cycle
(except maybe exynos), but I'd like to get the infrastructure code
in so for the next cycle I can start getting the driver support
into the individual drivers. We have started driver support for
i915, nouveau and udl along with I think exynos and omap in
staging. However this code relies on the dma-buf tree being
pulled into your tree first since it needs the latest interfaces
from that tree. I'll push to get that tree sent asap.
(oh and any warnings you see in i915 are gcc's fault from what anyone
can see)."
Fix up trivial conflicts in arch/x86/platform/mrst/mrst.c due to the new
msic_thermal_platform_data() thermal function being added next to the
tc35876x_platform_data() i2c device function..
* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (326 commits)
drm/i915: use DDC_ADDR instead of hard-coding it
drm/radeon: use DDC_ADDR instead of hard-coding it
drm: remove unneeded redefinition of DDC_ADDR
drm/exynos: added virtual display driver.
drm: allow loading an EDID as firmware to override broken monitor
drm/exynos: enable hdmi audio feature
drm/exynos: add default pixel format for plane
drm/exynos: cleanup exynos_hdmi.h
drm/exynos: add is_local member in exynos_drm_subdrv struct
drm/exynos: add subdrv open/close functions
drm/exynos: remove module of exynos drm subdrv
drm/exynos: release pending pageflip events when closed
drm/exynos: added new funtion to get/put dma address.
drm/exynos: update gem and buffer framework.
drm/exynos: added mode_fixup feature and code clean.
drm/exynos: add HDMI version 1.4 support
drm/exynos: remove exynos_mixer.h
gma500: Fix mmap frambuffer
drm/radeon: Drop radeon_gem_object_(un)pin.
drm/radeon: Restrict offset for legacy display engine.
...
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_buf.c')
-rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_buf.c | 191 |
1 files changed, 156 insertions, 35 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_buf.c b/drivers/gpu/drm/exynos/exynos_drm_buf.c index 3cf785c58186..4a3a5f72ed4a 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_buf.c +++ b/drivers/gpu/drm/exynos/exynos_drm_buf.c @@ -25,45 +25,161 @@ #include "drmP.h" #include "drm.h" +#include "exynos_drm.h" #include "exynos_drm_drv.h" #include "exynos_drm_gem.h" #include "exynos_drm_buf.h" static int lowlevel_buffer_allocate(struct drm_device *dev, - struct exynos_drm_gem_buf *buffer) + unsigned int flags, struct exynos_drm_gem_buf *buf) { + dma_addr_t start_addr, end_addr; + unsigned int npages, page_size, i = 0; + struct scatterlist *sgl; + int ret = 0; + DRM_DEBUG_KMS("%s\n", __FILE__); - buffer->kvaddr = dma_alloc_writecombine(dev->dev, buffer->size, - &buffer->dma_addr, GFP_KERNEL); - if (!buffer->kvaddr) { - DRM_ERROR("failed to allocate buffer.\n"); + if (flags & EXYNOS_BO_NONCONTIG) { + DRM_DEBUG_KMS("not support allocation type.\n"); + return -EINVAL; + } + + if (buf->dma_addr) { + DRM_DEBUG_KMS("already allocated.\n"); + return 0; + } + + if (buf->size >= SZ_1M) { + npages = (buf->size >> SECTION_SHIFT) + 1; + page_size = SECTION_SIZE; + } else if (buf->size >= SZ_64K) { + npages = (buf->size >> 16) + 1; + page_size = SZ_64K; + } else { + npages = (buf->size >> PAGE_SHIFT) + 1; + page_size = PAGE_SIZE; + } + + buf->sgt = kzalloc(sizeof(struct sg_table), GFP_KERNEL); + if (!buf->sgt) { + DRM_ERROR("failed to allocate sg table.\n"); return -ENOMEM; } - DRM_DEBUG_KMS("vaddr(0x%lx), dma_addr(0x%lx), size(0x%lx)\n", - (unsigned long)buffer->kvaddr, - (unsigned long)buffer->dma_addr, - buffer->size); + ret = sg_alloc_table(buf->sgt, npages, GFP_KERNEL); + if (ret < 0) { + DRM_ERROR("failed to initialize sg table.\n"); + kfree(buf->sgt); + buf->sgt = NULL; + return -ENOMEM; + } - return 0; + buf->kvaddr = dma_alloc_writecombine(dev->dev, buf->size, + &buf->dma_addr, GFP_KERNEL); + if (!buf->kvaddr) { + DRM_ERROR("failed to allocate buffer.\n"); + ret = -ENOMEM; + goto err1; + } + + start_addr = buf->dma_addr; + end_addr = buf->dma_addr + buf->size; + + buf->pages = kzalloc(sizeof(struct page) * npages, GFP_KERNEL); + if (!buf->pages) { + DRM_ERROR("failed to allocate pages.\n"); + ret = -ENOMEM; + goto err2; + } + + start_addr = buf->dma_addr; + end_addr = buf->dma_addr + buf->size; + + buf->pages = kzalloc(sizeof(struct page) * npages, GFP_KERNEL); + if (!buf->pages) { + DRM_ERROR("failed to allocate pages.\n"); + ret = -ENOMEM; + goto err2; + } + + sgl = buf->sgt->sgl; + + while (i < npages) { + buf->pages[i] = phys_to_page(start_addr); + sg_set_page(sgl, buf->pages[i], page_size, 0); + sg_dma_address(sgl) = start_addr; + start_addr += page_size; + if (end_addr - start_addr < page_size) + break; + sgl = sg_next(sgl); + i++; + } + + buf->pages[i] = phys_to_page(start_addr); + + sgl = sg_next(sgl); + sg_set_page(sgl, buf->pages[i+1], end_addr - start_addr, 0); + + DRM_DEBUG_KMS("vaddr(0x%lx), dma_addr(0x%lx), size(0x%lx)\n", + (unsigned long)buf->kvaddr, + (unsigned long)buf->dma_addr, + buf->size); + + return ret; +err2: + dma_free_writecombine(dev->dev, buf->size, buf->kvaddr, + (dma_addr_t)buf->dma_addr); + buf->dma_addr = (dma_addr_t)NULL; +err1: + sg_free_table(buf->sgt); + kfree(buf->sgt); + buf->sgt = NULL; + + return ret; } static void lowlevel_buffer_deallocate(struct drm_device *dev, - struct exynos_drm_gem_buf *buffer) + unsigned int flags, struct exynos_drm_gem_buf *buf) { DRM_DEBUG_KMS("%s.\n", __FILE__); - if (buffer->dma_addr && buffer->size) - dma_free_writecombine(dev->dev, buffer->size, buffer->kvaddr, - (dma_addr_t)buffer->dma_addr); - else - DRM_DEBUG_KMS("buffer data are invalid.\n"); + /* + * release only physically continuous memory and + * non-continuous memory would be released by exynos + * gem framework. + */ + if (flags & EXYNOS_BO_NONCONTIG) { + DRM_DEBUG_KMS("not support allocation type.\n"); + return; + } + + if (!buf->dma_addr) { + DRM_DEBUG_KMS("dma_addr is invalid.\n"); + return; + } + + DRM_DEBUG_KMS("vaddr(0x%lx), dma_addr(0x%lx), size(0x%lx)\n", + (unsigned long)buf->kvaddr, + (unsigned long)buf->dma_addr, + buf->size); + + sg_free_table(buf->sgt); + + kfree(buf->sgt); + buf->sgt = NULL; + + kfree(buf->pages); + buf->pages = NULL; + + dma_free_writecombine(dev->dev, buf->size, buf->kvaddr, + (dma_addr_t)buf->dma_addr); + buf->dma_addr = (dma_addr_t)NULL; } -struct exynos_drm_gem_buf *exynos_drm_buf_create(struct drm_device *dev, - unsigned int size) +struct exynos_drm_gem_buf *exynos_drm_init_buf(struct drm_device *dev, + unsigned int size) { struct exynos_drm_gem_buf *buffer; @@ -77,21 +193,11 @@ struct exynos_drm_gem_buf *exynos_drm_buf_create(struct drm_device *dev, } buffer->size = size; - - /* - * allocate memory region with size and set the memory information - * to vaddr and dma_addr of a buffer object. - */ - if (lowlevel_buffer_allocate(dev, buffer) < 0) { - kfree(buffer); - return NULL; - } - return buffer; } -void exynos_drm_buf_destroy(struct drm_device *dev, - struct exynos_drm_gem_buf *buffer) +void exynos_drm_fini_buf(struct drm_device *dev, + struct exynos_drm_gem_buf *buffer) { DRM_DEBUG_KMS("%s.\n", __FILE__); @@ -100,12 +206,27 @@ void exynos_drm_buf_destroy(struct drm_device *dev, return; } - lowlevel_buffer_deallocate(dev, buffer); - kfree(buffer); buffer = NULL; } -MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); -MODULE_DESCRIPTION("Samsung SoC DRM Buffer Management Module"); -MODULE_LICENSE("GPL"); +int exynos_drm_alloc_buf(struct drm_device *dev, + struct exynos_drm_gem_buf *buf, unsigned int flags) +{ + + /* + * allocate memory region and set the memory information + * to vaddr and dma_addr of a buffer object. + */ + if (lowlevel_buffer_allocate(dev, flags, buf) < 0) + return -ENOMEM; + + return 0; +} + +void exynos_drm_free_buf(struct drm_device *dev, + unsigned int flags, struct exynos_drm_gem_buf *buffer) +{ + + lowlevel_buffer_deallocate(dev, flags, buffer); +} |