drivers/gpu/drm/radeon/radeon_gart.c - maze/linux - Git at Google

 /*
  * Copyright 2008 Advanced Micro Devices, Inc.
  * Copyright 2008 Red Hat Inc.
  * Copyright 2009 Jerome Glisse.
  *
  * 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.
  *
  * Authors: Dave Airlie
  *          Alex Deucher
  *          Jerome Glisse
  */
 #include "drmP.h"
 #include "radeon_drm.h"
 #include "radeon.h"
 #include "radeon_reg.h"

 /*
  * Common GART table functions.
  */
 int radeon_gart_table_ram_alloc(struct radeon_device *rdev)
 {
 	void *ptr;

 	ptr = pci_alloc_consistent(rdev->pdev, rdev->gart.table_size,
 				   &rdev->gart.table_addr);
 	if (ptr == NULL) {
 		return -ENOMEM;
 	}
 #ifdef CONFIG_X86
 	if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480 ||
 	    rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) {
 		set_memory_uc((unsigned long)ptr,
 			      rdev->gart.table_size >> PAGE_SHIFT);
 	}
 #endif
 	rdev->gart.table.ram.ptr = ptr;
 	memset((void *)rdev->gart.table.ram.ptr, 0, rdev->gart.table_size);
 	return 0;
 }

 void radeon_gart_table_ram_free(struct radeon_device *rdev)
 {
 	if (rdev->gart.table.ram.ptr == NULL) {
 		return;
 	}
 #ifdef CONFIG_X86
 	if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480 ||
 	    rdev->family == CHIP_RS690 || rdev->family == CHIP_RS740) {
 		set_memory_wb((unsigned long)rdev->gart.table.ram.ptr,
 			      rdev->gart.table_size >> PAGE_SHIFT);
 	}
 #endif
 	pci_free_consistent(rdev->pdev, rdev->gart.table_size,
 			    (void *)rdev->gart.table.ram.ptr,
 			    rdev->gart.table_addr);
 	rdev->gart.table.ram.ptr = NULL;
 	rdev->gart.table_addr = 0;
 }

 int radeon_gart_table_vram_alloc(struct radeon_device *rdev)
 {
 	int r;

 	if (rdev->gart.table.vram.robj == NULL) {
 		r = radeon_bo_create(rdev, rdev->gart.table_size,
 				     PAGE_SIZE, true, RADEON_GEM_DOMAIN_VRAM,
 				     &rdev->gart.table.vram.robj);
 		if (r) {
 			return r;
 		}
 	}
 	return 0;
 }

 int radeon_gart_table_vram_pin(struct radeon_device *rdev)
 {
 	uint64_t gpu_addr;
 	int r;

 	r = radeon_bo_reserve(rdev->gart.table.vram.robj, false);
 	if (unlikely(r != 0))
 		return r;
 	r = radeon_bo_pin(rdev->gart.table.vram.robj,
 				RADEON_GEM_DOMAIN_VRAM, &gpu_addr);
 	if (r) {
 		radeon_bo_unreserve(rdev->gart.table.vram.robj);
 		return r;
 	}
 	r = radeon_bo_kmap(rdev->gart.table.vram.robj,
 				(void **)&rdev->gart.table.vram.ptr);
 	if (r)
 		radeon_bo_unpin(rdev->gart.table.vram.robj);
 	radeon_bo_unreserve(rdev->gart.table.vram.robj);
 	rdev->gart.table_addr = gpu_addr;
 	return r;
 }

 void radeon_gart_table_vram_free(struct radeon_device *rdev)
 {
 	int r;

 	if (rdev->gart.table.vram.robj == NULL) {
 		return;
 	}
 	r = radeon_bo_reserve(rdev->gart.table.vram.robj, false);
 	if (likely(r == 0)) {
 		radeon_bo_kunmap(rdev->gart.table.vram.robj);
 		radeon_bo_unpin(rdev->gart.table.vram.robj);
 		radeon_bo_unreserve(rdev->gart.table.vram.robj);
 	}
 	radeon_bo_unref(&rdev->gart.table.vram.robj);
 }


 /*
  * Common gart functions.
  */
 void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
 			int pages)
 {
 	unsigned t;
 	unsigned p;
 	int i, j;
 	u64 page_base;

 	if (!rdev->gart.ready) {
 		WARN(1, "trying to unbind memory to unitialized GART !\n");
 		return;
 	}
 	t = offset / RADEON_GPU_PAGE_SIZE;
 	p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
 	for (i = 0; i < pages; i++, p++) {
 		if (rdev->gart.pages[p]) {
 			if (!rdev->gart.ttm_alloced[p])
 				pci_unmap_page(rdev->pdev, rdev->gart.pages_addr[p],
 				       		PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 			rdev->gart.pages[p] = NULL;
 			rdev->gart.pages_addr[p] = rdev->dummy_page.addr;
 			page_base = rdev->gart.pages_addr[p];
 			for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
 				radeon_gart_set_page(rdev, t, page_base);
 				page_base += RADEON_GPU_PAGE_SIZE;
 			}
 		}
 	}
 	mb();
 	radeon_gart_tlb_flush(rdev);
 }

 int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
 		     int pages, struct page **pagelist, dma_addr_t *dma_addr)
 {
 	unsigned t;
 	unsigned p;
 	uint64_t page_base;
 	int i, j;

 	if (!rdev->gart.ready) {
 		WARN(1, "trying to bind memory to unitialized GART !\n");
 		return -EINVAL;
 	}
 	t = offset / RADEON_GPU_PAGE_SIZE;
 	p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);

 	for (i = 0; i < pages; i++, p++) {
 		/* we reverted the patch using dma_addr in TTM for now but this
 		 * code stops building on alpha so just comment it out for now */
 		if (0) { /*dma_addr[i] != DMA_ERROR_CODE) */
 			rdev->gart.ttm_alloced[p] = true;
 			rdev->gart.pages_addr[p] = dma_addr[i];
 		} else {
 			/* we need to support large memory configurations */
 			/* assume that unbind have already been call on the range */
 			rdev->gart.pages_addr[p] = pci_map_page(rdev->pdev, pagelist[i],
 							0, PAGE_SIZE,
 							PCI_DMA_BIDIRECTIONAL);
 			if (pci_dma_mapping_error(rdev->pdev, rdev->gart.pages_addr[p])) {
 				/* FIXME: failed to map page (return -ENOMEM?) */
 				radeon_gart_unbind(rdev, offset, pages);
 				return -ENOMEM;
 			}
 		}
 		rdev->gart.pages[p] = pagelist[i];
 		page_base = rdev->gart.pages_addr[p];
 		for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
 			radeon_gart_set_page(rdev, t, page_base);
 			page_base += RADEON_GPU_PAGE_SIZE;
 		}
 	}
 	mb();
 	radeon_gart_tlb_flush(rdev);
 	return 0;
 }

 void radeon_gart_restore(struct radeon_device *rdev)
 {
 	int i, j, t;
 	u64 page_base;

 	for (i = 0, t = 0; i < rdev->gart.num_cpu_pages; i++) {
 		page_base = rdev->gart.pages_addr[i];
 		for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
 			radeon_gart_set_page(rdev, t, page_base);
 			page_base += RADEON_GPU_PAGE_SIZE;
 		}
 	}
 	mb();
 	radeon_gart_tlb_flush(rdev);
 }

 int radeon_gart_init(struct radeon_device *rdev)
 {
 	int r, i;

 	if (rdev->gart.pages) {
 		return 0;
 	}
 	/* We need PAGE_SIZE >= RADEON_GPU_PAGE_SIZE */
 	if (PAGE_SIZE < RADEON_GPU_PAGE_SIZE) {
 		DRM_ERROR("Page size is smaller than GPU page size!\n");
 		return -EINVAL;
 	}
 	r = radeon_dummy_page_init(rdev);
 	if (r)
 		return r;
 	/* Compute table size */
 	rdev->gart.num_cpu_pages = rdev->mc.gtt_size / PAGE_SIZE;
 	rdev->gart.num_gpu_pages = rdev->mc.gtt_size / RADEON_GPU_PAGE_SIZE;
 	DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n",
 		 rdev->gart.num_cpu_pages, rdev->gart.num_gpu_pages);
 	/* Allocate pages table */
 	rdev->gart.pages = kzalloc(sizeof(void *) * rdev->gart.num_cpu_pages,
 				   GFP_KERNEL);
 	if (rdev->gart.pages == NULL) {
 		radeon_gart_fini(rdev);
 		return -ENOMEM;
 	}
 	rdev->gart.pages_addr = kzalloc(sizeof(dma_addr_t) *
 					rdev->gart.num_cpu_pages, GFP_KERNEL);
 	if (rdev->gart.pages_addr == NULL) {
 		radeon_gart_fini(rdev);
 		return -ENOMEM;
 	}
 	rdev->gart.ttm_alloced = kzalloc(sizeof(bool) *
 					 rdev->gart.num_cpu_pages, GFP_KERNEL);
 	if (rdev->gart.ttm_alloced == NULL) {
 		radeon_gart_fini(rdev);
 		return -ENOMEM;
 	}
 	/* set GART entry to point to the dummy page by default */
 	for (i = 0; i < rdev->gart.num_cpu_pages; i++) {
 		rdev->gart.pages_addr[i] = rdev->dummy_page.addr;
 	}
 	return 0;
 }

 void radeon_gart_fini(struct radeon_device *rdev)
 {
 	if (rdev->gart.pages && rdev->gart.pages_addr && rdev->gart.ready) {
 		/* unbind pages */
 		radeon_gart_unbind(rdev, 0, rdev->gart.num_cpu_pages);
 	}
 	rdev->gart.ready = false;
 	kfree(rdev->gart.pages);
 	kfree(rdev->gart.pages_addr);
 	kfree(rdev->gart.ttm_alloced);
 	rdev->gart.pages = NULL;
 	rdev->gart.pages_addr = NULL;
 	rdev->gart.ttm_alloced = NULL;

 	radeon_dummy_page_fini(rdev);
 }
	/*
	* Copyright 2008 Advanced Micro Devices, Inc.
	* Copyright 2008 Red Hat Inc.
	* Copyright 2009 Jerome Glisse.
	*
	* 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.
	*
	* Authors: Dave Airlie
	* Alex Deucher
	* Jerome Glisse
	*/
	#include "drmP.h"
	#include "radeon_drm.h"
	#include "radeon.h"
	#include "radeon_reg.h"

	/*
	* Common GART table functions.
	*/
	int radeon_gart_table_ram_alloc(struct radeon_device *rdev)
	{
	void *ptr;

	ptr = pci_alloc_consistent(rdev->pdev, rdev->gart.table_size,
	&rdev->gart.table_addr);
	if (ptr == NULL) {
	return -ENOMEM;
	}
	#ifdef CONFIG_X86
	if (rdev->family == CHIP_RS400 \|\| rdev->family == CHIP_RS480 \|\|
	rdev->family == CHIP_RS690 \|\| rdev->family == CHIP_RS740) {
	set_memory_uc((unsigned long)ptr,
	rdev->gart.table_size >> PAGE_SHIFT);
	}
	#endif
	rdev->gart.table.ram.ptr = ptr;
	memset((void *)rdev->gart.table.ram.ptr, 0, rdev->gart.table_size);
	return 0;
	}

	void radeon_gart_table_ram_free(struct radeon_device *rdev)
	{
	if (rdev->gart.table.ram.ptr == NULL) {
	return;
	}
	#ifdef CONFIG_X86
	if (rdev->family == CHIP_RS400 \|\| rdev->family == CHIP_RS480 \|\|
	rdev->family == CHIP_RS690 \|\| rdev->family == CHIP_RS740) {
	set_memory_wb((unsigned long)rdev->gart.table.ram.ptr,
	rdev->gart.table_size >> PAGE_SHIFT);
	}
	#endif
	pci_free_consistent(rdev->pdev, rdev->gart.table_size,
	(void *)rdev->gart.table.ram.ptr,
	rdev->gart.table_addr);
	rdev->gart.table.ram.ptr = NULL;
	rdev->gart.table_addr = 0;
	}

	int radeon_gart_table_vram_alloc(struct radeon_device *rdev)
	{
	int r;

	if (rdev->gart.table.vram.robj == NULL) {
	r = radeon_bo_create(rdev, rdev->gart.table_size,
	PAGE_SIZE, true, RADEON_GEM_DOMAIN_VRAM,
	&rdev->gart.table.vram.robj);
	if (r) {
	return r;
	}
	}
	return 0;
	}

	int radeon_gart_table_vram_pin(struct radeon_device *rdev)
	{
	uint64_t gpu_addr;
	int r;

	r = radeon_bo_reserve(rdev->gart.table.vram.robj, false);
	if (unlikely(r != 0))
	return r;
	r = radeon_bo_pin(rdev->gart.table.vram.robj,
	RADEON_GEM_DOMAIN_VRAM, &gpu_addr);
	if (r) {
	radeon_bo_unreserve(rdev->gart.table.vram.robj);
	return r;
	}
	r = radeon_bo_kmap(rdev->gart.table.vram.robj,
	(void **)&rdev->gart.table.vram.ptr);
	if (r)
	radeon_bo_unpin(rdev->gart.table.vram.robj);
	radeon_bo_unreserve(rdev->gart.table.vram.robj);
	rdev->gart.table_addr = gpu_addr;
	return r;
	}

	void radeon_gart_table_vram_free(struct radeon_device *rdev)
	{
	int r;

	if (rdev->gart.table.vram.robj == NULL) {
	return;
	}
	r = radeon_bo_reserve(rdev->gart.table.vram.robj, false);
	if (likely(r == 0)) {
	radeon_bo_kunmap(rdev->gart.table.vram.robj);
	radeon_bo_unpin(rdev->gart.table.vram.robj);
	radeon_bo_unreserve(rdev->gart.table.vram.robj);
	}
	radeon_bo_unref(&rdev->gart.table.vram.robj);
	}




	/*
	* Common gart functions.
	*/
	void radeon_gart_unbind(struct radeon_device *rdev, unsigned offset,
	int pages)
	{
	unsigned t;
	unsigned p;
	int i, j;
	u64 page_base;

	if (!rdev->gart.ready) {
	WARN(1, "trying to unbind memory to unitialized GART !\n");
	return;
	}
	t = offset / RADEON_GPU_PAGE_SIZE;
	p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);
	for (i = 0; i < pages; i++, p++) {
	if (rdev->gart.pages[p]) {
	if (!rdev->gart.ttm_alloced[p])
	pci_unmap_page(rdev->pdev, rdev->gart.pages_addr[p],
	PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
	rdev->gart.pages[p] = NULL;
	rdev->gart.pages_addr[p] = rdev->dummy_page.addr;
	page_base = rdev->gart.pages_addr[p];
	for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
	radeon_gart_set_page(rdev, t, page_base);
	page_base += RADEON_GPU_PAGE_SIZE;
	}
	}
	}
	mb();
	radeon_gart_tlb_flush(rdev);
	}

	int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,
	int pages, struct page *pagelist, dma_addr_t dma_addr)
	{
	unsigned t;
	unsigned p;
	uint64_t page_base;
	int i, j;

	if (!rdev->gart.ready) {
	WARN(1, "trying to bind memory to unitialized GART !\n");
	return -EINVAL;
	}
	t = offset / RADEON_GPU_PAGE_SIZE;
	p = t / (PAGE_SIZE / RADEON_GPU_PAGE_SIZE);

	for (i = 0; i < pages; i++, p++) {
	/* we reverted the patch using dma_addr in TTM for now but this
	* code stops building on alpha so just comment it out for now */
	if (0) { /dma_addr[i] != DMA_ERROR_CODE) /
	rdev->gart.ttm_alloced[p] = true;
	rdev->gart.pages_addr[p] = dma_addr[i];
	} else {
	/* we need to support large memory configurations */
	/* assume that unbind have already been call on the range */
	rdev->gart.pages_addr[p] = pci_map_page(rdev->pdev, pagelist[i],
	0, PAGE_SIZE,
	PCI_DMA_BIDIRECTIONAL);
	if (pci_dma_mapping_error(rdev->pdev, rdev->gart.pages_addr[p])) {
	/* FIXME: failed to map page (return -ENOMEM?) */
	radeon_gart_unbind(rdev, offset, pages);
	return -ENOMEM;
	}
	}
	rdev->gart.pages[p] = pagelist[i];
	page_base = rdev->gart.pages_addr[p];
	for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
	radeon_gart_set_page(rdev, t, page_base);
	page_base += RADEON_GPU_PAGE_SIZE;
	}
	}
	mb();
	radeon_gart_tlb_flush(rdev);
	return 0;
	}

	void radeon_gart_restore(struct radeon_device *rdev)
	{
	int i, j, t;
	u64 page_base;

	for (i = 0, t = 0; i < rdev->gart.num_cpu_pages; i++) {
	page_base = rdev->gart.pages_addr[i];
	for (j = 0; j < (PAGE_SIZE / RADEON_GPU_PAGE_SIZE); j++, t++) {
	radeon_gart_set_page(rdev, t, page_base);
	page_base += RADEON_GPU_PAGE_SIZE;
	}
	}
	mb();
	radeon_gart_tlb_flush(rdev);
	}

	int radeon_gart_init(struct radeon_device *rdev)
	{
	int r, i;

	if (rdev->gart.pages) {
	return 0;
	}
	/* We need PAGE_SIZE >= RADEON_GPU_PAGE_SIZE */
	if (PAGE_SIZE < RADEON_GPU_PAGE_SIZE) {
	DRM_ERROR("Page size is smaller than GPU page size!\n");
	return -EINVAL;
	}
	r = radeon_dummy_page_init(rdev);
	if (r)
	return r;
	/* Compute table size */
	rdev->gart.num_cpu_pages = rdev->mc.gtt_size / PAGE_SIZE;
	rdev->gart.num_gpu_pages = rdev->mc.gtt_size / RADEON_GPU_PAGE_SIZE;
	DRM_INFO("GART: num cpu pages %u, num gpu pages %u\n",
	rdev->gart.num_cpu_pages, rdev->gart.num_gpu_pages);
	/* Allocate pages table */
	rdev->gart.pages = kzalloc(sizeof(void ) rdev->gart.num_cpu_pages,
	GFP_KERNEL);
	if (rdev->gart.pages == NULL) {
	radeon_gart_fini(rdev);
	return -ENOMEM;
	}
	rdev->gart.pages_addr = kzalloc(sizeof(dma_addr_t) *
	rdev->gart.num_cpu_pages, GFP_KERNEL);
	if (rdev->gart.pages_addr == NULL) {
	radeon_gart_fini(rdev);
	return -ENOMEM;
	}
	rdev->gart.ttm_alloced = kzalloc(sizeof(bool) *
	rdev->gart.num_cpu_pages, GFP_KERNEL);
	if (rdev->gart.ttm_alloced == NULL) {
	radeon_gart_fini(rdev);
	return -ENOMEM;
	}
	/* set GART entry to point to the dummy page by default */
	for (i = 0; i < rdev->gart.num_cpu_pages; i++) {
	rdev->gart.pages_addr[i] = rdev->dummy_page.addr;
	}
	return 0;
	}

	void radeon_gart_fini(struct radeon_device *rdev)
	{
	if (rdev->gart.pages && rdev->gart.pages_addr && rdev->gart.ready) {
	/* unbind pages */
	radeon_gart_unbind(rdev, 0, rdev->gart.num_cpu_pages);
	}
	rdev->gart.ready = false;
	kfree(rdev->gart.pages);
	kfree(rdev->gart.pages_addr);
	kfree(rdev->gart.ttm_alloced);
	rdev->gart.pages = NULL;
	rdev->gart.pages_addr = NULL;
	rdev->gart.ttm_alloced = NULL;

	radeon_dummy_page_fini(rdev);
	}