363 lines
8.5 KiB
C
363 lines
8.5 KiB
C
/*-
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* Copyright (c) 2015 Michal Meloun
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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#include <dev/extres/clk/clk.h>
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#include <dev/drm2/drmP.h>
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#include <dev/drm2/drm_crtc_helper.h>
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#include <dev/drm2/drm_fb_helper.h>
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#include <arm/nvidia/drm2/tegra_drm.h>
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#include <sys/vmem.h>
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#include <sys/vmem.h>
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#include <vm/vm.h>
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#include <vm/vm_pageout.h>
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static void
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tegra_bo_destruct(struct tegra_bo *bo)
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{
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vm_page_t m;
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size_t size;
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int i;
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if (bo->cdev_pager == NULL)
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return;
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size = round_page(bo->gem_obj.size);
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if (bo->vbase != 0)
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pmap_qremove(bo->vbase, bo->npages);
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VM_OBJECT_WLOCK(bo->cdev_pager);
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for (i = 0; i < bo->npages; i++) {
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m = bo->m[i];
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vm_page_busy_acquire(m, 0);
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cdev_pager_free_page(bo->cdev_pager, m);
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m->flags &= ~PG_FICTITIOUS;
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vm_page_unwire_noq(m);
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vm_page_free(m);
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}
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VM_OBJECT_WUNLOCK(bo->cdev_pager);
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vm_object_deallocate(bo->cdev_pager);
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if (bo->vbase != 0)
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vmem_free(kmem_arena, bo->vbase, size);
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}
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static void
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tegra_bo_free_object(struct drm_gem_object *gem_obj)
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{
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struct tegra_bo *bo;
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bo = container_of(gem_obj, struct tegra_bo, gem_obj);
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drm_gem_free_mmap_offset(gem_obj);
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drm_gem_object_release(gem_obj);
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tegra_bo_destruct(bo);
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free(bo->m, DRM_MEM_DRIVER);
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free(bo, DRM_MEM_DRIVER);
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}
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static int
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tegra_bo_alloc_contig(size_t npages, u_long alignment, vm_memattr_t memattr,
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vm_page_t **ret_page)
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{
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vm_page_t m;
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int tries, i;
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vm_paddr_t low, high, boundary;
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low = 0;
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high = -1UL;
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boundary = 0;
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tries = 0;
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retry:
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m = vm_page_alloc_noobj_contig(VM_ALLOC_WIRED | VM_ALLOC_ZERO, npages,
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low, high, alignment, boundary, memattr);
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if (m == NULL) {
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if (tries < 3) {
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if (!vm_page_reclaim_contig(0, npages, low, high,
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alignment, boundary))
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vm_wait(NULL);
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tries++;
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goto retry;
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}
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return (ENOMEM);
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}
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for (i = 0; i < npages; i++, m++) {
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m->valid = VM_PAGE_BITS_ALL;
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(*ret_page)[i] = m;
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}
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return (0);
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}
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/* Initialize pager and insert all object pages to it*/
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static int
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tegra_bo_init_pager(struct tegra_bo *bo)
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{
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vm_page_t m;
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size_t size;
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int i;
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size = round_page(bo->gem_obj.size);
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bo->pbase = VM_PAGE_TO_PHYS(bo->m[0]);
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if (vmem_alloc(kmem_arena, size, M_WAITOK | M_BESTFIT, &bo->vbase))
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return (ENOMEM);
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VM_OBJECT_WLOCK(bo->cdev_pager);
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for (i = 0; i < bo->npages; i++) {
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m = bo->m[i];
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/*
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* XXX This is a temporary hack.
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* We need pager suitable for paging (mmap) managed
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* real (non-fictitious) pages.
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* - managed pages are needed for clean module unload.
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* - aliasing fictitious page to real one is bad,
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* pmap cannot handle this situation without issues
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* It expects that
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* paddr = PHYS_TO_VM_PAGE(VM_PAGE_TO_PHYS(paddr))
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* for every single page passed to pmap.
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*/
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m->oflags &= ~VPO_UNMANAGED;
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m->flags |= PG_FICTITIOUS;
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if (vm_page_insert(m, bo->cdev_pager, i) != 0)
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return (EINVAL);
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}
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VM_OBJECT_WUNLOCK(bo->cdev_pager);
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pmap_qenter(bo->vbase, bo->m, bo->npages);
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return (0);
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}
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/* Allocate memory for frame buffer */
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static int
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tegra_bo_alloc(struct drm_device *drm, struct tegra_bo *bo)
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{
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size_t size;
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int rv;
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size = bo->gem_obj.size;
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bo->npages = atop(size);
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bo->m = malloc(sizeof(vm_page_t *) * bo->npages, DRM_MEM_DRIVER,
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M_WAITOK | M_ZERO);
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rv = tegra_bo_alloc_contig(bo->npages, PAGE_SIZE,
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VM_MEMATTR_WRITE_COMBINING, &(bo->m));
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if (rv != 0) {
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DRM_WARNING("Cannot allocate memory for gem object.\n");
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return (rv);
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}
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rv = tegra_bo_init_pager(bo);
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if (rv != 0) {
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DRM_WARNING("Cannot initialize gem object pager.\n");
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return (rv);
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}
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return (0);
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}
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int
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tegra_bo_create(struct drm_device *drm, size_t size, struct tegra_bo **res_bo)
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{
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struct tegra_bo *bo;
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int rv;
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if (size <= 0)
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return (-EINVAL);
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bo = malloc(sizeof(*bo), DRM_MEM_DRIVER, M_WAITOK | M_ZERO);
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size = round_page(size);
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rv = drm_gem_object_init(drm, &bo->gem_obj, size);
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if (rv != 0) {
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free(bo, DRM_MEM_DRIVER);
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return (rv);
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}
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rv = drm_gem_create_mmap_offset(&bo->gem_obj);
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if (rv != 0) {
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drm_gem_object_release(&bo->gem_obj);
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free(bo, DRM_MEM_DRIVER);
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return (rv);
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}
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bo->cdev_pager = cdev_pager_allocate(&bo->gem_obj, OBJT_MGTDEVICE,
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drm->driver->gem_pager_ops, size, 0, 0, NULL);
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rv = tegra_bo_alloc(drm, bo);
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if (rv != 0) {
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tegra_bo_free_object(&bo->gem_obj);
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return (rv);
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}
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*res_bo = bo;
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return (0);
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}
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static int
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tegra_bo_create_with_handle(struct drm_file *file, struct drm_device *drm,
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size_t size, uint32_t *handle, struct tegra_bo **res_bo)
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{
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int rv;
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struct tegra_bo *bo;
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rv = tegra_bo_create(drm, size, &bo);
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if (rv != 0)
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return (rv);
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rv = drm_gem_handle_create(file, &bo->gem_obj, handle);
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if (rv != 0) {
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tegra_bo_free_object(&bo->gem_obj);
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drm_gem_object_release(&bo->gem_obj);
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return (rv);
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}
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drm_gem_object_unreference_unlocked(&bo->gem_obj);
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*res_bo = bo;
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return (0);
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}
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static int
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tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm_dev,
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struct drm_mode_create_dumb *args)
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{
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struct tegra_drm *drm;
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struct tegra_bo *bo;
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int rv;
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drm = container_of(drm_dev, struct tegra_drm, drm_dev);
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args->pitch= (args->width * args->bpp + 7) / 8;
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args->pitch = roundup(args->pitch, drm->pitch_align);
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args->size = args->pitch * args->height;
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rv = tegra_bo_create_with_handle(file, drm_dev, args->size,
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&args->handle, &bo);
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return (rv);
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}
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static int
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tegra_bo_dumb_map_offset(struct drm_file *file_priv,
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struct drm_device *drm_dev, uint32_t handle, uint64_t *offset)
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{
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struct drm_gem_object *gem_obj;
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int rv;
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DRM_LOCK(drm_dev);
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gem_obj = drm_gem_object_lookup(drm_dev, file_priv, handle);
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if (gem_obj == NULL) {
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device_printf(drm_dev->dev, "Object not found\n");
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DRM_UNLOCK(drm_dev);
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return (-EINVAL);
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}
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rv = drm_gem_create_mmap_offset(gem_obj);
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if (rv != 0)
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goto fail;
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*offset = DRM_GEM_MAPPING_OFF(gem_obj->map_list.key) |
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DRM_GEM_MAPPING_KEY;
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drm_gem_object_unreference(gem_obj);
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DRM_UNLOCK(drm_dev);
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return (0);
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fail:
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drm_gem_object_unreference(gem_obj);
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DRM_UNLOCK(drm_dev);
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return (rv);
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}
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static int
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tegra_bo_dumb_destroy(struct drm_file *file_priv, struct drm_device *drm_dev,
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unsigned int handle)
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{
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int rv;
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rv = drm_gem_handle_delete(file_priv, handle);
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return (rv);
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}
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/*
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* mmap support
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*/
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static int
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tegra_gem_pager_fault(vm_object_t vm_obj, vm_ooffset_t offset, int prot,
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vm_page_t *mres)
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{
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#ifdef DRM_PAGER_DEBUG
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DRM_DEBUG("object %p offset %jd prot %d mres %p\n",
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vm_obj, (intmax_t)offset, prot, mres);
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#endif
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return (VM_PAGER_FAIL);
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}
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static int
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tegra_gem_pager_ctor(void *handle, vm_ooffset_t size, vm_prot_t prot,
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vm_ooffset_t foff, struct ucred *cred, u_short *color)
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{
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if (color != NULL)
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*color = 0;
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return (0);
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}
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static void
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tegra_gem_pager_dtor(void *handle)
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{
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}
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static struct cdev_pager_ops tegra_gem_pager_ops = {
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.cdev_pg_fault = tegra_gem_pager_fault,
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.cdev_pg_ctor = tegra_gem_pager_ctor,
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.cdev_pg_dtor = tegra_gem_pager_dtor
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};
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/* Fill up relevant fields in drm_driver ops */
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void
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tegra_bo_driver_register(struct drm_driver *drm_drv)
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{
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drm_drv->gem_free_object = tegra_bo_free_object;
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drm_drv->gem_pager_ops = &tegra_gem_pager_ops;
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drm_drv->dumb_create = tegra_bo_dumb_create;
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drm_drv->dumb_map_offset = tegra_bo_dumb_map_offset;
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drm_drv->dumb_destroy = tegra_bo_dumb_destroy;
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}
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