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/*

 * 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"

#if 0

/*

 * 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;

}

#endif

int radeon_gart_table_vram_alloc(struct radeon_device *rdev)

{

    uint32_t gpu_addr;

    int r;

    dbgprintf("%s\n",__FUNCTION__);

    if (rdev->gart.table.vram.robj == NULL) {

        r = radeon_object_create(rdev, NULL,

                     rdev->gart.table_size,

                     true,

                     RADEON_GEM_DOMAIN_VRAM,

                     false, &rdev->gart.table.vram.robj);

        if (r) {

            return r;

        }

    }

    r = radeon_object_pin(rdev->gart.table.vram.robj,

                  RADEON_GEM_DOMAIN_VRAM, &gpu_addr);

    if (r) {

//        radeon_object_unref(&rdev->gart.table.vram.robj);

        return r;

    }

    r = radeon_object_kmap(rdev->gart.table.vram.robj,

                   (void **)&rdev->gart.table.vram.ptr);

    if (r) {

//        radeon_object_unpin(rdev->gart.table.vram.robj);

//        radeon_object_unref(&rdev->gart.table.vram.robj);

        DRM_ERROR("radeon: failed to map gart vram table.\n");

        return r;

    }

    rdev->gart.table_addr = gpu_addr;

    dbgprintf("alloc gart vram:  gpu_base %x lin_addr %x\n",

               rdev->gart.table_addr, rdev->gart.table.vram.ptr);

//    gpu_addr = 0x800000;

//    u32_t pci_addr = rdev->mc.aper_base + gpu_addr;

//    rdev->gart.table.vram.ptr = (void*)MapIoMem(pci_addr, rdev->gart.table_size, PG_SW);

//    dbgprintf("alloc gart vram:\n  gpu_base %x pci_base %x lin_addr %x",

//               gpu_addr, pci_addr, rdev->gart.table.vram.ptr);

    return 0;

}

void radeon_gart_table_vram_free(struct radeon_device *rdev)

{

	if (rdev->gart.table.vram.robj == NULL) {

		return;

	}

//   radeon_object_kunmap(rdev->gart.table.vram.robj);

//   radeon_object_unpin(rdev->gart.table.vram.robj);

//   radeon_object_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;

	if (!rdev->gart.ready) {

//       WARN(1, "trying to unbind memory to unitialized GART !\n");

		return;

	}

	t = offset / 4096;

	p = t / (PAGE_SIZE / 4096);

	for (i = 0; i < pages; i++, p++) {

		if (rdev->gart.pages[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] = 0;

			for (j = 0; j < (PAGE_SIZE / 4096); j++, t++) {

				radeon_gart_set_page(rdev, t, 0);

			}

		}

	}

	mb();

	radeon_gart_tlb_flush(rdev);

}

int radeon_gart_bind(struct radeon_device *rdev, unsigned offset,

             int pages, u32_t *pagelist)

{

    unsigned t;

    unsigned p;

    uint64_t page_base;

    int i, j;

    dbgprintf("%s  ",__FUNCTION__);

    dbgprintf("offset %x pages %x list %x\n",

               offset, pages, pagelist);

    if (!rdev->gart.ready) {

        DRM_ERROR("trying to bind memory to unitialized GART !\n");

        return -EINVAL;

    }

    t = offset / 4096;

    p = t / (PAGE_SIZE / 4096);

    for (i = 0; i < pages; i++, p++) {

        /* we need to support large memory configurations */

        /* assume that unbind have already been call on the range */

        rdev->gart.pages_addr[p] = pagelist[i] & ~4095;

        //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 = (uint32_t)rdev->gart.pages_addr[p];

        for (j = 0; j < (PAGE_SIZE / 4096); j++, t++) {

            radeon_gart_set_page(rdev, t, page_base);

            page_base += 4096;

        }

    }

    mb();

    radeon_gart_tlb_flush(rdev);

    dbgprintf("done %s\n",__FUNCTION__);

    return 0;

}

int radeon_gart_init(struct radeon_device *rdev)

{

    dbgprintf("%s\n",__FUNCTION__);

    if (rdev->gart.pages) {

        return 0;

    }

    /* We need PAGE_SIZE >= 4096 */

    if (PAGE_SIZE < 4096) {

        DRM_ERROR("Page size is smaller than GPU page size!\n");

        return -EINVAL;

    }

    /* Compute table size */

    rdev->gart.num_cpu_pages = rdev->mc.gtt_size / PAGE_SIZE;

    rdev->gart.num_gpu_pages = rdev->mc.gtt_size / 4096;

    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(u32_t) *

                    rdev->gart.num_cpu_pages, GFP_KERNEL);

    if (rdev->gart.pages_addr == NULL) {

//        radeon_gart_fini(rdev);

        return -ENOMEM;

    }

    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);

	rdev->gart.pages = NULL;

	rdev->gart.pages_addr = NULL;

}