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Commit 771fe6b9 authored by Jerome Glisse's avatar Jerome Glisse Committed by Dave Airlie
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drm/radeon: introduce kernel modesetting for radeon hardware



Add kernel modesetting support to radeon driver, use the ttm memory
manager to manage memory and DRM/GEM to provide userspace API.
In order to avoid backward compatibility issue and to allow clean
design and code the radeon kernel modesetting use different code path
than old radeon/drm driver.

When kernel modesetting is enabled the IOCTL of radeon/drm
driver are considered as invalid and an error message is printed
in the log and they return failure.

KMS enabled userspace will use new API to talk with the radeon/drm
driver. The new API provide functions to create/destroy/share/mmap
buffer object which are then managed by the kernel memory manager
(here TTM). In order to submit command to the GPU the userspace
provide a buffer holding the command stream, along this buffer
userspace have to provide a list of buffer object used by the
command stream. The kernel radeon driver will then place buffer
in GPU accessible memory and will update command stream to reflect
the position of the different buffers.

The kernel will also perform security check on command stream
provided by the user, we want to catch and forbid any illegal use
of the GPU such as DMA into random system memory or into memory
not owned by the process supplying the command stream. This part
of the code is still incomplete and this why we propose that patch
as a staging driver addition, future security might forbid current
experimental userspace to run.

This code support the following hardware : R1XX,R2XX,R3XX,R4XX,R5XX
(radeon up to X1950). Works is underway to provide support for R6XX,
R7XX and newer hardware (radeon from HD2XXX to HD4XXX).

Authors:
    Jerome Glisse <jglisse@redhat.com>
    Dave Airlie <airlied@redhat.com>
    Alex Deucher <alexdeucher@gmail.com>

Signed-off-by: default avatarJerome Glisse <jglisse@redhat.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
Signed-off-by: default avatarAlex Deucher <alexdeucher@gmail.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent ba4e7d97
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@@ -19,7 +19,7 @@ menuconfig DRM
	  (/dev/agpgart) support.
	  (/dev/agpgart) support.


config DRM_TTM
config DRM_TTM
	tristate "TTM memory manager"
	tristate
	depends on DRM
	depends on DRM
	help
	help
	  GPU memory management subsystem for devices with multiple
	  GPU memory management subsystem for devices with multiple
@@ -44,6 +44,11 @@ config DRM_R128
config DRM_RADEON
config DRM_RADEON
	tristate "ATI Radeon"
	tristate "ATI Radeon"
	depends on DRM && PCI
	depends on DRM && PCI
	select FB_CFB_FILLRECT
	select FB_CFB_COPYAREA
	select FB_CFB_IMAGEBLIT
	select FB
	select FRAMEBUFFER_CONSOLE if !EMBEDDED
	help
	help
	  Choose this option if you have an ATI Radeon graphics card.  There
	  Choose this option if you have an ATI Radeon graphics card.  There
	  are both PCI and AGP versions.  You don't need to choose this to
	  are both PCI and AGP versions.  You don't need to choose this to
+34 −0
Original line number Original line Diff line number Diff line
config DRM_RADEON_KMS
	bool "Enable modesetting on radeon by default"
	depends on DRM_RADEON
	select DRM_TTM
	help
	  Choose this option if you want kernel modesetting enabled by default,
	  and you have a new enough userspace to support this. Running old
	  userspaces with this enabled will cause pain.

	  When kernel modesetting is enabled the IOCTL of radeon/drm
	  driver are considered as invalid and an error message is printed
	  in the log and they return failure.

	  KMS enabled userspace will use new API to talk with the radeon/drm
	  driver. The new API provide functions to create/destroy/share/mmap
	  buffer object which are then managed by the kernel memory manager
	  (here TTM). In order to submit command to the GPU the userspace
	  provide a buffer holding the command stream, along this buffer
	  userspace have to provide a list of buffer object used by the
	  command stream. The kernel radeon driver will then place buffer
	  in GPU accessible memory and will update command stream to reflect
	  the position of the different buffers.

	  The kernel will also perform security check on command stream
	  provided by the user, we want to catch and forbid any illegal use
	  of the GPU such as DMA into random system memory or into memory
	  not owned by the process supplying the command stream. This part
	  of the code is still incomplete and this why we propose that patch
	  as a staging driver addition, future security might forbid current
	  experimental userspace to run.

	  This code support the following hardware : R1XX,R2XX,R3XX,R4XX,R5XX
	  (radeon up to X1950). Works is underway to provide support for R6XX,
	  R7XX and newer hardware (radeon from HD2XXX to HD4XXX).
+11 −1
Original line number Original line Diff line number Diff line
@@ -3,7 +3,17 @@
# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.


ccflags-y := -Iinclude/drm
ccflags-y := -Iinclude/drm
radeon-y := radeon_drv.o radeon_cp.o radeon_state.o radeon_mem.o radeon_irq.o r300_cmdbuf.o r600_cp.o
radeon-y := radeon_drv.o radeon_cp.o radeon_state.o radeon_mem.o \
	radeon_irq.o r300_cmdbuf.o r600_cp.o

radeon-$(CONFIG_DRM_RADEON_KMS) += radeon_device.o radeon_kms.o \
	radeon_atombios.o radeon_agp.o atombios_crtc.o radeon_combios.o \
	atom.o radeon_fence.o radeon_ttm.o radeon_object.o radeon_gart.o \
	radeon_legacy_crtc.o radeon_legacy_encoders.o radeon_connectors.o \
	radeon_encoders.o radeon_display.o radeon_cursor.o radeon_i2c.o \
	radeon_clocks.o radeon_fb.o radeon_gem.o radeon_ring.o radeon_irq_kms.o \
	radeon_cs.o radeon_bios.o radeon_benchmark.o r100.o r300.o r420.o \
	rs400.o rs600.o rs690.o rv515.o r520.o r600.o rs780.o rv770.o


radeon-$(CONFIG_COMPAT) += radeon_ioc32.o
radeon-$(CONFIG_COMPAT) += radeon_ioc32.o


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/*
 * Copyright 2008 Advanced Micro Devices, 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, sublicense,
 * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
 *
 * Author: Stanislaw Skowronek
 */

#ifndef ATOM_BITS_H
#define ATOM_BITS_H

static inline uint8_t get_u8(void *bios, int ptr)
{
    return ((unsigned char *)bios)[ptr];
}
#define U8(ptr) get_u8(ctx->ctx->bios, (ptr))
#define CU8(ptr) get_u8(ctx->bios, (ptr))
static inline uint16_t get_u16(void *bios, int ptr)
{
    return get_u8(bios ,ptr)|(((uint16_t)get_u8(bios, ptr+1))<<8);
}
#define U16(ptr) get_u16(ctx->ctx->bios, (ptr))
#define CU16(ptr) get_u16(ctx->bios, (ptr))
static inline uint32_t get_u32(void *bios, int ptr)
{
    return get_u16(bios, ptr)|(((uint32_t)get_u16(bios, ptr+2))<<16);
}
#define U32(ptr) get_u32(ctx->ctx->bios, (ptr))
#define CU32(ptr) get_u32(ctx->bios, (ptr))
#define CSTR(ptr) (((char *)(ctx->bios))+(ptr))

#endif
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