diff options
Diffstat (limited to 'drivers/gpu/drm/imagination/pvr_vm.c')
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_vm.c | 1090 |
1 files changed, 1090 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imagination/pvr_vm.c b/drivers/gpu/drm/imagination/pvr_vm.c new file mode 100644 index 000000000..e59517ba0 --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_vm.c @@ -0,0 +1,1090 @@ +// SPDX-License-Identifier: GPL-2.0-only OR MIT +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#include "pvr_vm.h" + +#include "pvr_device.h" +#include "pvr_drv.h" +#include "pvr_gem.h" +#include "pvr_mmu.h" +#include "pvr_rogue_fwif.h" +#include "pvr_rogue_heap_config.h" + +#include <drm/drm_exec.h> +#include <drm/drm_gem.h> +#include <drm/drm_gpuvm.h> + +#include <linux/container_of.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/gfp_types.h> +#include <linux/kref.h> +#include <linux/mutex.h> +#include <linux/stddef.h> + +/** + * DOC: Memory context + * + * This is the "top level" datatype in the VM code. It's exposed in the public + * API as an opaque handle. + */ + +/** + * struct pvr_vm_context - Context type used to represent a single VM. + */ +struct pvr_vm_context { + /** + * @pvr_dev: The PowerVR device to which this context is bound. + * This binding is immutable for the life of the context. + */ + struct pvr_device *pvr_dev; + + /** @mmu_ctx: The context for binding to physical memory. */ + struct pvr_mmu_context *mmu_ctx; + + /** @gpuvm_mgr: GPUVM object associated with this context. */ + struct drm_gpuvm gpuvm_mgr; + + /** @lock: Global lock on this VM. */ + struct mutex lock; + + /** + * @fw_mem_ctx_obj: Firmware object representing firmware memory + * context. + */ + struct pvr_fw_object *fw_mem_ctx_obj; + + /** @ref_count: Reference count of object. */ + struct kref ref_count; + + /** + * @dummy_gem: GEM object to enable VM reservation. All private BOs + * should use the @dummy_gem.resv and not their own _resv field. + */ + struct drm_gem_object dummy_gem; +}; + +static inline +struct pvr_vm_context *to_pvr_vm_context(struct drm_gpuvm *gpuvm) +{ + return container_of(gpuvm, struct pvr_vm_context, gpuvm_mgr); +} + +struct pvr_vm_context *pvr_vm_context_get(struct pvr_vm_context *vm_ctx) +{ + if (vm_ctx) + kref_get(&vm_ctx->ref_count); + + return vm_ctx; +} + +/** + * pvr_vm_get_page_table_root_addr() - Get the DMA address of the root of the + * page table structure behind a VM context. + * @vm_ctx: Target VM context. + */ +dma_addr_t pvr_vm_get_page_table_root_addr(struct pvr_vm_context *vm_ctx) +{ + return pvr_mmu_get_root_table_dma_addr(vm_ctx->mmu_ctx); +} + +/** + * pvr_vm_get_dma_resv() - Expose the dma_resv owned by the VM context. + * @vm_ctx: Target VM context. + * + * This is used to allow private BOs to share a dma_resv for faster fence + * updates. + * + * Returns: The dma_resv pointer. + */ +struct dma_resv *pvr_vm_get_dma_resv(struct pvr_vm_context *vm_ctx) +{ + return vm_ctx->dummy_gem.resv; +} + +/** + * DOC: Memory mappings + */ + +/** + * struct pvr_vm_gpuva - Wrapper type representing a single VM mapping. + */ +struct pvr_vm_gpuva { + /** @base: The wrapped drm_gpuva object. */ + struct drm_gpuva base; +}; + +enum pvr_vm_bind_type { + PVR_VM_BIND_TYPE_MAP, + PVR_VM_BIND_TYPE_UNMAP, +}; + +/** + * struct pvr_vm_bind_op - Context of a map/unmap operation. + */ +struct pvr_vm_bind_op { + /** @type: Map or unmap. */ + enum pvr_vm_bind_type type; + + /** @pvr_obj: Object associated with mapping (map only). */ + struct pvr_gem_object *pvr_obj; + + /** + * @vm_ctx: VM context where the mapping will be created or destroyed. + */ + struct pvr_vm_context *vm_ctx; + + /** @mmu_op_ctx: MMU op context. */ + struct pvr_mmu_op_context *mmu_op_ctx; + + /** @gpuvm_bo: Prealloced wrapped BO for attaching to the gpuvm. */ + struct drm_gpuvm_bo *gpuvm_bo; + + /** + * @new_va: Prealloced VA mapping object (init in callback). + * Used when creating a mapping. + */ + struct pvr_vm_gpuva *new_va; + + /** + * @prev_va: Prealloced VA mapping object (init in callback). + * Used when a mapping or unmapping operation overlaps an existing + * mapping and splits away the beginning into a new mapping. + */ + struct pvr_vm_gpuva *prev_va; + + /** + * @next_va: Prealloced VA mapping object (init in callback). + * Used when a mapping or unmapping operation overlaps an existing + * mapping and splits away the end into a new mapping. + */ + struct pvr_vm_gpuva *next_va; + + /** @offset: Offset into @pvr_obj to begin mapping from. */ + u64 offset; + + /** @device_addr: Device-virtual address at the start of the mapping. */ + u64 device_addr; + + /** @size: Size of the desired mapping. */ + u64 size; +}; + +/** + * pvr_vm_bind_op_exec() - Execute a single bind op. + * @bind_op: Bind op context. + * + * Returns: + * * 0 on success, + * * Any error code returned by drm_gpuva_sm_map(), drm_gpuva_sm_unmap(), or + * a callback function. + */ +static int pvr_vm_bind_op_exec(struct pvr_vm_bind_op *bind_op) +{ + switch (bind_op->type) { + case PVR_VM_BIND_TYPE_MAP: + return drm_gpuvm_sm_map(&bind_op->vm_ctx->gpuvm_mgr, + bind_op, bind_op->device_addr, + bind_op->size, + gem_from_pvr_gem(bind_op->pvr_obj), + bind_op->offset); + + case PVR_VM_BIND_TYPE_UNMAP: + return drm_gpuvm_sm_unmap(&bind_op->vm_ctx->gpuvm_mgr, + bind_op, bind_op->device_addr, + bind_op->size); + } + + /* + * This shouldn't happen unless something went wrong + * in drm_sched. + */ + WARN_ON(1); + return -EINVAL; +} + +static void pvr_vm_bind_op_fini(struct pvr_vm_bind_op *bind_op) +{ + drm_gpuvm_bo_put(bind_op->gpuvm_bo); + + kfree(bind_op->new_va); + kfree(bind_op->prev_va); + kfree(bind_op->next_va); + + if (bind_op->pvr_obj) + pvr_gem_object_put(bind_op->pvr_obj); + + if (bind_op->mmu_op_ctx) + pvr_mmu_op_context_destroy(bind_op->mmu_op_ctx); +} + +static int +pvr_vm_bind_op_map_init(struct pvr_vm_bind_op *bind_op, + struct pvr_vm_context *vm_ctx, + struct pvr_gem_object *pvr_obj, u64 offset, + u64 device_addr, u64 size) +{ + struct drm_gem_object *obj = gem_from_pvr_gem(pvr_obj); + const bool is_user = vm_ctx != vm_ctx->pvr_dev->kernel_vm_ctx; + const u64 pvr_obj_size = pvr_gem_object_size(pvr_obj); + struct sg_table *sgt; + u64 offset_plus_size; + int err; + + if (check_add_overflow(offset, size, &offset_plus_size)) + return -EINVAL; + + if (is_user && + !pvr_find_heap_containing(vm_ctx->pvr_dev, device_addr, size)) { + return -EINVAL; + } + + if (!pvr_device_addr_and_size_are_valid(vm_ctx, device_addr, size) || + offset & ~PAGE_MASK || size & ~PAGE_MASK || + offset >= pvr_obj_size || offset_plus_size > pvr_obj_size) + return -EINVAL; + + bind_op->type = PVR_VM_BIND_TYPE_MAP; + + dma_resv_lock(obj->resv, NULL); + bind_op->gpuvm_bo = drm_gpuvm_bo_obtain(&vm_ctx->gpuvm_mgr, obj); + dma_resv_unlock(obj->resv); + if (IS_ERR(bind_op->gpuvm_bo)) + return PTR_ERR(bind_op->gpuvm_bo); + + bind_op->new_va = kzalloc(sizeof(*bind_op->new_va), GFP_KERNEL); + bind_op->prev_va = kzalloc(sizeof(*bind_op->prev_va), GFP_KERNEL); + bind_op->next_va = kzalloc(sizeof(*bind_op->next_va), GFP_KERNEL); + if (!bind_op->new_va || !bind_op->prev_va || !bind_op->next_va) { + err = -ENOMEM; + goto err_bind_op_fini; + } + + /* Pin pages so they're ready for use. */ + sgt = pvr_gem_object_get_pages_sgt(pvr_obj); + err = PTR_ERR_OR_ZERO(sgt); + if (err) + goto err_bind_op_fini; + + bind_op->mmu_op_ctx = + pvr_mmu_op_context_create(vm_ctx->mmu_ctx, sgt, offset, size); + err = PTR_ERR_OR_ZERO(bind_op->mmu_op_ctx); + if (err) { + bind_op->mmu_op_ctx = NULL; + goto err_bind_op_fini; + } + + bind_op->pvr_obj = pvr_obj; + bind_op->vm_ctx = vm_ctx; + bind_op->device_addr = device_addr; + bind_op->size = size; + bind_op->offset = offset; + + return 0; + +err_bind_op_fini: + pvr_vm_bind_op_fini(bind_op); + + return err; +} + +static int +pvr_vm_bind_op_unmap_init(struct pvr_vm_bind_op *bind_op, + struct pvr_vm_context *vm_ctx, u64 device_addr, + u64 size) +{ + int err; + + if (!pvr_device_addr_and_size_are_valid(vm_ctx, device_addr, size)) + return -EINVAL; + + bind_op->type = PVR_VM_BIND_TYPE_UNMAP; + + bind_op->prev_va = kzalloc(sizeof(*bind_op->prev_va), GFP_KERNEL); + bind_op->next_va = kzalloc(sizeof(*bind_op->next_va), GFP_KERNEL); + if (!bind_op->prev_va || !bind_op->next_va) { + err = -ENOMEM; + goto err_bind_op_fini; + } + + bind_op->mmu_op_ctx = + pvr_mmu_op_context_create(vm_ctx->mmu_ctx, NULL, 0, 0); + err = PTR_ERR_OR_ZERO(bind_op->mmu_op_ctx); + if (err) { + bind_op->mmu_op_ctx = NULL; + goto err_bind_op_fini; + } + + bind_op->vm_ctx = vm_ctx; + bind_op->device_addr = device_addr; + bind_op->size = size; + + return 0; + +err_bind_op_fini: + pvr_vm_bind_op_fini(bind_op); + + return err; +} + +/** + * pvr_vm_gpuva_map() - Insert a mapping into a memory context. + * @op: gpuva op containing the remap details. + * @op_ctx: Operation context. + * + * Context: Called by drm_gpuvm_sm_map following a successful mapping while + * @op_ctx.vm_ctx mutex is held. + * + * Return: + * * 0 on success, or + * * Any error returned by pvr_mmu_map(). + */ +static int +pvr_vm_gpuva_map(struct drm_gpuva_op *op, void *op_ctx) +{ + struct pvr_gem_object *pvr_gem = gem_to_pvr_gem(op->map.gem.obj); + struct pvr_vm_bind_op *ctx = op_ctx; + int err; + + if ((op->map.gem.offset | op->map.va.range) & ~PVR_DEVICE_PAGE_MASK) + return -EINVAL; + + err = pvr_mmu_map(ctx->mmu_op_ctx, op->map.va.range, pvr_gem->flags, + op->map.va.addr); + if (err) + return err; + + drm_gpuva_map(&ctx->vm_ctx->gpuvm_mgr, &ctx->new_va->base, &op->map); + drm_gpuva_link(&ctx->new_va->base, ctx->gpuvm_bo); + ctx->new_va = NULL; + + return 0; +} + +/** + * pvr_vm_gpuva_unmap() - Remove a mapping from a memory context. + * @op: gpuva op containing the unmap details. + * @op_ctx: Operation context. + * + * Context: Called by drm_gpuvm_sm_unmap following a successful unmapping while + * @op_ctx.vm_ctx mutex is held. + * + * Return: + * * 0 on success, or + * * Any error returned by pvr_mmu_unmap(). + */ +static int +pvr_vm_gpuva_unmap(struct drm_gpuva_op *op, void *op_ctx) +{ + struct pvr_vm_bind_op *ctx = op_ctx; + + int err = pvr_mmu_unmap(ctx->mmu_op_ctx, op->unmap.va->va.addr, + op->unmap.va->va.range); + + if (err) + return err; + + drm_gpuva_unmap(&op->unmap); + drm_gpuva_unlink(op->unmap.va); + + return 0; +} + +/** + * pvr_vm_gpuva_remap() - Remap a mapping within a memory context. + * @op: gpuva op containing the remap details. + * @op_ctx: Operation context. + * + * Context: Called by either drm_gpuvm_sm_map or drm_gpuvm_sm_unmap when a + * mapping or unmapping operation causes a region to be split. The + * @op_ctx.vm_ctx mutex is held. + * + * Return: + * * 0 on success, or + * * Any error returned by pvr_vm_gpuva_unmap() or pvr_vm_gpuva_unmap(). + */ +static int +pvr_vm_gpuva_remap(struct drm_gpuva_op *op, void *op_ctx) +{ + struct pvr_vm_bind_op *ctx = op_ctx; + u64 va_start = 0, va_range = 0; + int err; + + drm_gpuva_op_remap_to_unmap_range(&op->remap, &va_start, &va_range); + err = pvr_mmu_unmap(ctx->mmu_op_ctx, va_start, va_range); + if (err) + return err; + + /* No actual remap required: the page table tree depth is fixed to 3, + * and we use 4k page table entries only for now. + */ + drm_gpuva_remap(&ctx->prev_va->base, &ctx->next_va->base, &op->remap); + + if (op->remap.prev) { + pvr_gem_object_get(gem_to_pvr_gem(ctx->prev_va->base.gem.obj)); + drm_gpuva_link(&ctx->prev_va->base, ctx->gpuvm_bo); + ctx->prev_va = NULL; + } + + if (op->remap.next) { + pvr_gem_object_get(gem_to_pvr_gem(ctx->next_va->base.gem.obj)); + drm_gpuva_link(&ctx->next_va->base, ctx->gpuvm_bo); + ctx->next_va = NULL; + } + + drm_gpuva_unlink(op->remap.unmap->va); + + return 0; +} + +/* + * Public API + * + * For an overview of these functions, see *DOC: Public API* in "pvr_vm.h". + */ + +/** + * pvr_device_addr_is_valid() - Tests whether a device-virtual address + * is valid. + * @device_addr: Virtual device address to test. + * + * Return: + * * %true if @device_addr is within the valid range for a device page + * table and is aligned to the device page size, or + * * %false otherwise. + */ +bool +pvr_device_addr_is_valid(u64 device_addr) +{ + return (device_addr & ~PVR_PAGE_TABLE_ADDR_MASK) == 0 && + (device_addr & ~PVR_DEVICE_PAGE_MASK) == 0; +} + +/** + * pvr_device_addr_and_size_are_valid() - Tests whether a device-virtual + * address and associated size are both valid. + * @vm_ctx: Target VM context. + * @device_addr: Virtual device address to test. + * @size: Size of the range based at @device_addr to test. + * + * Calling pvr_device_addr_is_valid() twice (once on @size, and again on + * @device_addr + @size) to verify a device-virtual address range initially + * seems intuitive, but it produces a false-negative when the address range + * is right at the end of device-virtual address space. + * + * This function catches that corner case, as well as checking that + * @size is non-zero. + * + * Return: + * * %true if @device_addr is device page aligned; @size is device page + * aligned; the range specified by @device_addr and @size is within the + * bounds of the device-virtual address space, and @size is non-zero, or + * * %false otherwise. + */ +bool +pvr_device_addr_and_size_are_valid(struct pvr_vm_context *vm_ctx, + u64 device_addr, u64 size) +{ + return pvr_device_addr_is_valid(device_addr) && + drm_gpuvm_range_valid(&vm_ctx->gpuvm_mgr, device_addr, size) && + size != 0 && (size & ~PVR_DEVICE_PAGE_MASK) == 0 && + (device_addr + size <= PVR_PAGE_TABLE_ADDR_SPACE_SIZE); +} + +static void pvr_gpuvm_free(struct drm_gpuvm *gpuvm) +{ + kfree(to_pvr_vm_context(gpuvm)); +} + +static const struct drm_gpuvm_ops pvr_vm_gpuva_ops = { + .vm_free = pvr_gpuvm_free, + .sm_step_map = pvr_vm_gpuva_map, + .sm_step_remap = pvr_vm_gpuva_remap, + .sm_step_unmap = pvr_vm_gpuva_unmap, +}; + +static void +fw_mem_context_init(void *cpu_ptr, void *priv) +{ + struct rogue_fwif_fwmemcontext *fw_mem_ctx = cpu_ptr; + struct pvr_vm_context *vm_ctx = priv; + + fw_mem_ctx->pc_dev_paddr = pvr_vm_get_page_table_root_addr(vm_ctx); + fw_mem_ctx->page_cat_base_reg_set = ROGUE_FW_BIF_INVALID_PCSET; +} + +/** + * pvr_vm_create_context() - Create a new VM context. + * @pvr_dev: Target PowerVR device. + * @is_userspace_context: %true if this context is for userspace. This will + * create a firmware memory context for the VM context + * and disable warnings when tearing down mappings. + * + * Return: + * * A handle to the newly-minted VM context on success, + * * -%EINVAL if the feature "virtual address space bits" on @pvr_dev is + * missing or has an unsupported value, + * * -%ENOMEM if allocation of the structure behind the opaque handle fails, + * or + * * Any error encountered while setting up internal structures. + */ +struct pvr_vm_context * +pvr_vm_create_context(struct pvr_device *pvr_dev, bool is_userspace_context) +{ + struct drm_device *drm_dev = from_pvr_device(pvr_dev); + + struct pvr_vm_context *vm_ctx; + u16 device_addr_bits; + + int err; + + err = PVR_FEATURE_VALUE(pvr_dev, virtual_address_space_bits, + &device_addr_bits); + if (err) { + drm_err(drm_dev, + "Failed to get device virtual address space bits\n"); + return ERR_PTR(err); + } + + if (device_addr_bits != PVR_PAGE_TABLE_ADDR_BITS) { + drm_err(drm_dev, + "Device has unsupported virtual address space size\n"); + return ERR_PTR(-EINVAL); + } + + vm_ctx = kzalloc(sizeof(*vm_ctx), GFP_KERNEL); + if (!vm_ctx) + return ERR_PTR(-ENOMEM); + + vm_ctx->pvr_dev = pvr_dev; + + vm_ctx->mmu_ctx = pvr_mmu_context_create(pvr_dev); + err = PTR_ERR_OR_ZERO(vm_ctx->mmu_ctx); + if (err) + goto err_free; + + if (is_userspace_context) { + err = pvr_fw_object_create(pvr_dev, sizeof(struct rogue_fwif_fwmemcontext), + PVR_BO_FW_FLAGS_DEVICE_UNCACHED, + fw_mem_context_init, vm_ctx, &vm_ctx->fw_mem_ctx_obj); + + if (err) + goto err_page_table_destroy; + } + + drm_gem_private_object_init(&pvr_dev->base, &vm_ctx->dummy_gem, 0); + drm_gpuvm_init(&vm_ctx->gpuvm_mgr, + is_userspace_context ? "PowerVR-user-VM" : "PowerVR-FW-VM", + 0, &pvr_dev->base, &vm_ctx->dummy_gem, + 0, 1ULL << device_addr_bits, 0, 0, &pvr_vm_gpuva_ops); + + mutex_init(&vm_ctx->lock); + kref_init(&vm_ctx->ref_count); + + return vm_ctx; + +err_page_table_destroy: + pvr_mmu_context_destroy(vm_ctx->mmu_ctx); + +err_free: + kfree(vm_ctx); + + return ERR_PTR(err); +} + +/** + * pvr_vm_context_release() - Teardown a VM context. + * @ref_count: Pointer to reference counter of the VM context. + * + * This function ensures that no mappings are left dangling by unmapping them + * all in order of ascending device-virtual address. + */ +static void +pvr_vm_context_release(struct kref *ref_count) +{ + struct pvr_vm_context *vm_ctx = + container_of(ref_count, struct pvr_vm_context, ref_count); + + if (vm_ctx->fw_mem_ctx_obj) + pvr_fw_object_destroy(vm_ctx->fw_mem_ctx_obj); + + WARN_ON(pvr_vm_unmap(vm_ctx, vm_ctx->gpuvm_mgr.mm_start, + vm_ctx->gpuvm_mgr.mm_range)); + + pvr_mmu_context_destroy(vm_ctx->mmu_ctx); + drm_gem_private_object_fini(&vm_ctx->dummy_gem); + mutex_destroy(&vm_ctx->lock); + + drm_gpuvm_put(&vm_ctx->gpuvm_mgr); +} + +/** + * pvr_vm_context_lookup() - Look up VM context from handle + * @pvr_file: Pointer to pvr_file structure. + * @handle: Object handle. + * + * Takes reference on VM context object. Call pvr_vm_context_put() to release. + * + * Returns: + * * The requested object on success, or + * * %NULL on failure (object does not exist in list, or is not a VM context) + */ +struct pvr_vm_context * +pvr_vm_context_lookup(struct pvr_file *pvr_file, u32 handle) +{ + struct pvr_vm_context *vm_ctx; + + xa_lock(&pvr_file->vm_ctx_handles); + vm_ctx = xa_load(&pvr_file->vm_ctx_handles, handle); + if (vm_ctx) + kref_get(&vm_ctx->ref_count); + + xa_unlock(&pvr_file->vm_ctx_handles); + + return vm_ctx; +} + +/** + * pvr_vm_context_put() - Release a reference on a VM context + * @vm_ctx: Target VM context. + * + * Returns: + * * %true if the VM context was destroyed, or + * * %false if there are any references still remaining. + */ +bool +pvr_vm_context_put(struct pvr_vm_context *vm_ctx) +{ + if (vm_ctx) + return kref_put(&vm_ctx->ref_count, pvr_vm_context_release); + + return true; +} + +/** + * pvr_destroy_vm_contexts_for_file: Destroy any VM contexts associated with the + * given file. + * @pvr_file: Pointer to pvr_file structure. + * + * Removes all vm_contexts associated with @pvr_file from the device VM context + * list and drops initial references. vm_contexts will then be destroyed once + * all outstanding references are dropped. + */ +void pvr_destroy_vm_contexts_for_file(struct pvr_file *pvr_file) +{ + struct pvr_vm_context *vm_ctx; + unsigned long handle; + + xa_for_each(&pvr_file->vm_ctx_handles, handle, vm_ctx) { + /* vm_ctx is not used here because that would create a race with xa_erase */ + pvr_vm_context_put(xa_erase(&pvr_file->vm_ctx_handles, handle)); + } +} + +static int +pvr_vm_lock_extra(struct drm_gpuvm_exec *vm_exec) +{ + struct pvr_vm_bind_op *bind_op = vm_exec->extra.priv; + struct pvr_gem_object *pvr_obj = bind_op->pvr_obj; + + /* Unmap operations don't have an object to lock. */ + if (!pvr_obj) + return 0; + + /* Acquire lock on the GEM being mapped. */ + return drm_exec_lock_obj(&vm_exec->exec, gem_from_pvr_gem(pvr_obj)); +} + +/** + * pvr_vm_map() - Map a section of physical memory into a section of + * device-virtual memory. + * @vm_ctx: Target VM context. + * @pvr_obj: Target PowerVR memory object. + * @pvr_obj_offset: Offset into @pvr_obj to map from. + * @device_addr: Virtual device address at the start of the requested mapping. + * @size: Size of the requested mapping. + * + * No handle is returned to represent the mapping. Instead, callers should + * remember @device_addr and use that as a handle. + * + * Return: + * * 0 on success, + * * -%EINVAL if @device_addr is not a valid page-aligned device-virtual + * address; the region specified by @pvr_obj_offset and @size does not fall + * entirely within @pvr_obj, or any part of the specified region of @pvr_obj + * is not device-virtual page-aligned, + * * Any error encountered while performing internal operations required to + * destroy the mapping (returned from pvr_vm_gpuva_map or + * pvr_vm_gpuva_remap). + */ +int +pvr_vm_map(struct pvr_vm_context *vm_ctx, struct pvr_gem_object *pvr_obj, + u64 pvr_obj_offset, u64 device_addr, u64 size) +{ + struct pvr_vm_bind_op bind_op = {0}; + struct drm_gpuvm_exec vm_exec = { + .vm = &vm_ctx->gpuvm_mgr, + .flags = DRM_EXEC_INTERRUPTIBLE_WAIT | + DRM_EXEC_IGNORE_DUPLICATES, + .extra = { + .fn = pvr_vm_lock_extra, + .priv = &bind_op, + }, + }; + + int err = pvr_vm_bind_op_map_init(&bind_op, vm_ctx, pvr_obj, + pvr_obj_offset, device_addr, + size); + + if (err) + return err; + + pvr_gem_object_get(pvr_obj); + + err = drm_gpuvm_exec_lock(&vm_exec); + if (err) + goto err_cleanup; + + err = pvr_vm_bind_op_exec(&bind_op); + + drm_gpuvm_exec_unlock(&vm_exec); + +err_cleanup: + pvr_vm_bind_op_fini(&bind_op); + + return err; +} + +/** + * pvr_vm_unmap() - Unmap an already mapped section of device-virtual memory. + * @vm_ctx: Target VM context. + * @device_addr: Virtual device address at the start of the target mapping. + * @size: Size of the target mapping. + * + * Return: + * * 0 on success, + * * -%EINVAL if @device_addr is not a valid page-aligned device-virtual + * address, + * * Any error encountered while performing internal operations required to + * destroy the mapping (returned from pvr_vm_gpuva_unmap or + * pvr_vm_gpuva_remap). + */ +int +pvr_vm_unmap(struct pvr_vm_context *vm_ctx, u64 device_addr, u64 size) +{ + struct pvr_vm_bind_op bind_op = {0}; + struct drm_gpuvm_exec vm_exec = { + .vm = &vm_ctx->gpuvm_mgr, + .flags = DRM_EXEC_INTERRUPTIBLE_WAIT | + DRM_EXEC_IGNORE_DUPLICATES, + .extra = { + .fn = pvr_vm_lock_extra, + .priv = &bind_op, + }, + }; + + int err = pvr_vm_bind_op_unmap_init(&bind_op, vm_ctx, device_addr, + size); + if (err) + return err; + + err = drm_gpuvm_exec_lock(&vm_exec); + if (err) + goto err_cleanup; + + err = pvr_vm_bind_op_exec(&bind_op); + + drm_gpuvm_exec_unlock(&vm_exec); + +err_cleanup: + pvr_vm_bind_op_fini(&bind_op); + + return err; +} + +/* Static data areas are determined by firmware. */ +static const struct drm_pvr_static_data_area static_data_areas[] = { + { + .area_usage = DRM_PVR_STATIC_DATA_AREA_FENCE, + .location_heap_id = DRM_PVR_HEAP_GENERAL, + .offset = 0, + .size = 128, + }, + { + .area_usage = DRM_PVR_STATIC_DATA_AREA_YUV_CSC, + .location_heap_id = DRM_PVR_HEAP_GENERAL, + .offset = 128, + .size = 1024, + }, + { + .area_usage = DRM_PVR_STATIC_DATA_AREA_VDM_SYNC, + .location_heap_id = DRM_PVR_HEAP_PDS_CODE_DATA, + .offset = 0, + .size = 128, + }, + { + .area_usage = DRM_PVR_STATIC_DATA_AREA_EOT, + .location_heap_id = DRM_PVR_HEAP_PDS_CODE_DATA, + .offset = 128, + .size = 128, + }, + { + .area_usage = DRM_PVR_STATIC_DATA_AREA_VDM_SYNC, + .location_heap_id = DRM_PVR_HEAP_USC_CODE, + .offset = 0, + .size = 128, + }, +}; + +#define GET_RESERVED_SIZE(last_offset, last_size) round_up((last_offset) + (last_size), PAGE_SIZE) + +/* + * The values given to GET_RESERVED_SIZE() are taken from the last entry in the corresponding + * static data area for each heap. + */ +static const struct drm_pvr_heap pvr_heaps[] = { + [DRM_PVR_HEAP_GENERAL] = { + .base = ROGUE_GENERAL_HEAP_BASE, + .size = ROGUE_GENERAL_HEAP_SIZE, + .flags = 0, + .page_size_log2 = PVR_DEVICE_PAGE_SHIFT, + }, + [DRM_PVR_HEAP_PDS_CODE_DATA] = { + .base = ROGUE_PDSCODEDATA_HEAP_BASE, + .size = ROGUE_PDSCODEDATA_HEAP_SIZE, + .flags = 0, + .page_size_log2 = PVR_DEVICE_PAGE_SHIFT, + }, + [DRM_PVR_HEAP_USC_CODE] = { + .base = ROGUE_USCCODE_HEAP_BASE, + .size = ROGUE_USCCODE_HEAP_SIZE, + .flags = 0, + .page_size_log2 = PVR_DEVICE_PAGE_SHIFT, + }, + [DRM_PVR_HEAP_RGNHDR] = { + .base = ROGUE_RGNHDR_HEAP_BASE, + .size = ROGUE_RGNHDR_HEAP_SIZE, + .flags = 0, + .page_size_log2 = PVR_DEVICE_PAGE_SHIFT, + }, + [DRM_PVR_HEAP_VIS_TEST] = { + .base = ROGUE_VISTEST_HEAP_BASE, + .size = ROGUE_VISTEST_HEAP_SIZE, + .flags = 0, + .page_size_log2 = PVR_DEVICE_PAGE_SHIFT, + }, + [DRM_PVR_HEAP_TRANSFER_FRAG] = { + .base = ROGUE_TRANSFER_FRAG_HEAP_BASE, + .size = ROGUE_TRANSFER_FRAG_HEAP_SIZE, + .flags = 0, + .page_size_log2 = PVR_DEVICE_PAGE_SHIFT, + }, +}; + +int +pvr_static_data_areas_get(const struct pvr_device *pvr_dev, + struct drm_pvr_ioctl_dev_query_args *args) +{ + struct drm_pvr_dev_query_static_data_areas query = {0}; + int err; + + if (!args->pointer) { + args->size = sizeof(struct drm_pvr_dev_query_static_data_areas); + return 0; + } + + err = PVR_UOBJ_GET(query, args->size, args->pointer); + if (err < 0) + return err; + + if (!query.static_data_areas.array) { + query.static_data_areas.count = ARRAY_SIZE(static_data_areas); + query.static_data_areas.stride = sizeof(struct drm_pvr_static_data_area); + goto copy_out; + } + + if (query.static_data_areas.count > ARRAY_SIZE(static_data_areas)) + query.static_data_areas.count = ARRAY_SIZE(static_data_areas); + + err = PVR_UOBJ_SET_ARRAY(&query.static_data_areas, static_data_areas); + if (err < 0) + return err; + +copy_out: + err = PVR_UOBJ_SET(args->pointer, args->size, query); + if (err < 0) + return err; + + args->size = sizeof(query); + return 0; +} + +int +pvr_heap_info_get(const struct pvr_device *pvr_dev, + struct drm_pvr_ioctl_dev_query_args *args) +{ + struct drm_pvr_dev_query_heap_info query = {0}; + u64 dest; + int err; + + if (!args->pointer) { + args->size = sizeof(struct drm_pvr_dev_query_heap_info); + return 0; + } + + err = PVR_UOBJ_GET(query, args->size, args->pointer); + if (err < 0) + return err; + + if (!query.heaps.array) { + query.heaps.count = ARRAY_SIZE(pvr_heaps); + query.heaps.stride = sizeof(struct drm_pvr_heap); + goto copy_out; + } + + if (query.heaps.count > ARRAY_SIZE(pvr_heaps)) + query.heaps.count = ARRAY_SIZE(pvr_heaps); + + /* Region header heap is only present if BRN63142 is present. */ + dest = query.heaps.array; + for (size_t i = 0; i < query.heaps.count; i++) { + struct drm_pvr_heap heap = pvr_heaps[i]; + + if (i == DRM_PVR_HEAP_RGNHDR && !PVR_HAS_QUIRK(pvr_dev, 63142)) + heap.size = 0; + + err = PVR_UOBJ_SET(dest, query.heaps.stride, heap); + if (err < 0) + return err; + + dest += query.heaps.stride; + } + +copy_out: + err = PVR_UOBJ_SET(args->pointer, args->size, query); + if (err < 0) + return err; + + args->size = sizeof(query); + return 0; +} + +/** + * pvr_heap_contains_range() - Determine if a given heap contains the specified + * device-virtual address range. + * @pvr_heap: Target heap. + * @start: Inclusive start of the target range. + * @end: Inclusive end of the target range. + * + * It is an error to call this function with values of @start and @end that do + * not satisfy the condition @start <= @end. + */ +static __always_inline bool +pvr_heap_contains_range(const struct drm_pvr_heap *pvr_heap, u64 start, u64 end) +{ + return pvr_heap->base <= start && end < pvr_heap->base + pvr_heap->size; +} + +/** + * pvr_find_heap_containing() - Find a heap which contains the specified + * device-virtual address range. + * @pvr_dev: Target PowerVR device. + * @start: Start of the target range. + * @size: Size of the target range. + * + * Return: + * * A pointer to a constant instance of struct drm_pvr_heap representing the + * heap containing the entire range specified by @start and @size on + * success, or + * * %NULL if no such heap exists. + */ +const struct drm_pvr_heap * +pvr_find_heap_containing(struct pvr_device *pvr_dev, u64 start, u64 size) +{ + u64 end; + + if (check_add_overflow(start, size - 1, &end)) + return NULL; + + /* + * There are no guarantees about the order of address ranges in + * &pvr_heaps, so iterate over the entire array for a heap whose + * range completely encompasses the given range. + */ + for (u32 heap_id = 0; heap_id < ARRAY_SIZE(pvr_heaps); heap_id++) { + /* Filter heaps that present only with an associated quirk */ + if (heap_id == DRM_PVR_HEAP_RGNHDR && + !PVR_HAS_QUIRK(pvr_dev, 63142)) { + continue; + } + + if (pvr_heap_contains_range(&pvr_heaps[heap_id], start, end)) + return &pvr_heaps[heap_id]; + } + + return NULL; +} + +/** + * pvr_vm_find_gem_object() - Look up a buffer object from a given + * device-virtual address. + * @vm_ctx: [IN] Target VM context. + * @device_addr: [IN] Virtual device address at the start of the required + * object. + * @mapped_offset_out: [OUT] Pointer to location to write offset of the start + * of the mapped region within the buffer object. May be + * %NULL if this information is not required. + * @mapped_size_out: [OUT] Pointer to location to write size of the mapped + * region. May be %NULL if this information is not required. + * + * If successful, a reference will be taken on the buffer object. The caller + * must drop the reference with pvr_gem_object_put(). + * + * Return: + * * The PowerVR buffer object mapped at @device_addr if one exists, or + * * %NULL otherwise. + */ +struct pvr_gem_object * +pvr_vm_find_gem_object(struct pvr_vm_context *vm_ctx, u64 device_addr, + u64 *mapped_offset_out, u64 *mapped_size_out) +{ + struct pvr_gem_object *pvr_obj; + struct drm_gpuva *va; + + mutex_lock(&vm_ctx->lock); + + va = drm_gpuva_find_first(&vm_ctx->gpuvm_mgr, device_addr, 1); + if (!va) + goto err_unlock; + + pvr_obj = gem_to_pvr_gem(va->gem.obj); + pvr_gem_object_get(pvr_obj); + + if (mapped_offset_out) + *mapped_offset_out = va->gem.offset; + if (mapped_size_out) + *mapped_size_out = va->va.range; + + mutex_unlock(&vm_ctx->lock); + + return pvr_obj; + +err_unlock: + mutex_unlock(&vm_ctx->lock); + + return NULL; +} + +/** + * pvr_vm_get_fw_mem_context: Get object representing firmware memory context + * @vm_ctx: Target VM context. + * + * Returns: + * * FW object representing firmware memory context, or + * * %NULL if this VM context does not have a firmware memory context. + */ +struct pvr_fw_object * +pvr_vm_get_fw_mem_context(struct pvr_vm_context *vm_ctx) +{ + return vm_ctx->fw_mem_ctx_obj; +} |