diff options
Diffstat (limited to 'drivers/gpu/drm/panthor/panthor_drv.c')
| -rw-r--r-- | drivers/gpu/drm/panthor/panthor_drv.c | 1488 |
1 files changed, 1488 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panthor/panthor_drv.c b/drivers/gpu/drm/panthor/panthor_drv.c new file mode 100644 index 000000000000..b8a84f26b3ef --- /dev/null +++ b/drivers/gpu/drm/panthor/panthor_drv.c @@ -0,0 +1,1488 @@ +// SPDX-License-Identifier: GPL-2.0 or MIT +/* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */ +/* Copyright 2019 Linaro, Ltd., Rob Herring <robh@kernel.org> */ +/* Copyright 2019 Collabora ltd. */ + +#include <linux/list.h> +#include <linux/module.h> +#include <linux/of_platform.h> +#include <linux/pagemap.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> + +#include <drm/drm_debugfs.h> +#include <drm/drm_drv.h> +#include <drm/drm_exec.h> +#include <drm/drm_ioctl.h> +#include <drm/drm_syncobj.h> +#include <drm/drm_utils.h> +#include <drm/gpu_scheduler.h> +#include <drm/panthor_drm.h> + +#include "panthor_device.h" +#include "panthor_fw.h" +#include "panthor_gem.h" +#include "panthor_gpu.h" +#include "panthor_heap.h" +#include "panthor_mmu.h" +#include "panthor_regs.h" +#include "panthor_sched.h" + +/** + * DOC: user <-> kernel object copy helpers. + */ + +/** + * panthor_set_uobj() - Copy kernel object to user object. + * @usr_ptr: Users pointer. + * @usr_size: Size of the user object. + * @min_size: Minimum size for this object. + * @kern_size: Size of the kernel object. + * @in: Address of the kernel object to copy. + * + * Helper automating kernel -> user object copies. + * + * Don't use this function directly, use PANTHOR_UOBJ_SET() instead. + * + * Return: 0 on success, a negative error code otherwise. + */ +static int +panthor_set_uobj(u64 usr_ptr, u32 usr_size, u32 min_size, u32 kern_size, const void *in) +{ + /* User size shouldn't be smaller than the minimal object size. */ + if (usr_size < min_size) + return -EINVAL; + + if (copy_to_user(u64_to_user_ptr(usr_ptr), in, min_t(u32, usr_size, kern_size))) + return -EFAULT; + + /* When the kernel object is smaller than the user object, we fill the gap with + * zeros. + */ + if (usr_size > kern_size && + clear_user(u64_to_user_ptr(usr_ptr + kern_size), usr_size - kern_size)) { + return -EFAULT; + } + + return 0; +} + +/** + * panthor_get_uobj_array() - Copy a user object array into a kernel accessible object array. + * @in: The object array to copy. + * @min_stride: Minimum array stride. + * @obj_size: Kernel object size. + * + * Helper automating user -> kernel object copies. + * + * Don't use this function directly, use PANTHOR_UOBJ_GET_ARRAY() instead. + * + * Return: newly allocated object array or an ERR_PTR on error. + */ +static void * +panthor_get_uobj_array(const struct drm_panthor_obj_array *in, u32 min_stride, + u32 obj_size) +{ + int ret = 0; + void *out_alloc; + + /* User stride must be at least the minimum object size, otherwise it might + * lack useful information. + */ + if (in->stride < min_stride) + return ERR_PTR(-EINVAL); + + if (!in->count) + return NULL; + + out_alloc = kvmalloc_array(in->count, obj_size, GFP_KERNEL); + if (!out_alloc) + return ERR_PTR(-ENOMEM); + + if (obj_size == in->stride) { + /* Fast path when user/kernel have the same uAPI header version. */ + if (copy_from_user(out_alloc, u64_to_user_ptr(in->array), + (unsigned long)obj_size * in->count)) + ret = -EFAULT; + } else { + void __user *in_ptr = u64_to_user_ptr(in->array); + void *out_ptr = out_alloc; + + /* If the sizes differ, we need to copy elements one by one. */ + for (u32 i = 0; i < in->count; i++) { + ret = copy_struct_from_user(out_ptr, obj_size, in_ptr, in->stride); + if (ret) + break; + + out_ptr += obj_size; + in_ptr += in->stride; + } + } + + if (ret) { + kvfree(out_alloc); + return ERR_PTR(ret); + } + + return out_alloc; +} + +/** + * PANTHOR_UOBJ_MIN_SIZE_INTERNAL() - Get the minimum user object size + * @_typename: Object type. + * @_last_mandatory_field: Last mandatory field. + * + * Get the minimum user object size based on the last mandatory field name, + * A.K.A, the name of the last field of the structure at the time this + * structure was added to the uAPI. + * + * Don't use directly, use PANTHOR_UOBJ_DECL() instead. + */ +#define PANTHOR_UOBJ_MIN_SIZE_INTERNAL(_typename, _last_mandatory_field) \ + (offsetof(_typename, _last_mandatory_field) + \ + sizeof(((_typename *)NULL)->_last_mandatory_field)) + +/** + * PANTHOR_UOBJ_DECL() - Declare a new uAPI object whose subject to + * evolutions. + * @_typename: Object type. + * @_last_mandatory_field: Last mandatory field. + * + * Should be used to extend the PANTHOR_UOBJ_MIN_SIZE() list. + */ +#define PANTHOR_UOBJ_DECL(_typename, _last_mandatory_field) \ + _typename : PANTHOR_UOBJ_MIN_SIZE_INTERNAL(_typename, _last_mandatory_field) + +/** + * PANTHOR_UOBJ_MIN_SIZE() - Get the minimum size of a given uAPI object + * @_obj_name: Object to get the minimum size of. + * + * Don't use this macro directly, it's automatically called by + * PANTHOR_UOBJ_{SET,GET_ARRAY}(). + */ +#define PANTHOR_UOBJ_MIN_SIZE(_obj_name) \ + _Generic(_obj_name, \ + PANTHOR_UOBJ_DECL(struct drm_panthor_gpu_info, tiler_present), \ + PANTHOR_UOBJ_DECL(struct drm_panthor_csif_info, pad), \ + PANTHOR_UOBJ_DECL(struct drm_panthor_sync_op, timeline_value), \ + PANTHOR_UOBJ_DECL(struct drm_panthor_queue_submit, syncs), \ + PANTHOR_UOBJ_DECL(struct drm_panthor_queue_create, ringbuf_size), \ + PANTHOR_UOBJ_DECL(struct drm_panthor_vm_bind_op, syncs)) + +/** + * PANTHOR_UOBJ_SET() - Copy a kernel object to a user object. + * @_dest_usr_ptr: User pointer to copy to. + * @_usr_size: Size of the user object. + * @_src_obj: Kernel object to copy (not a pointer). + * + * Return: 0 on success, a negative error code otherwise. + */ +#define PANTHOR_UOBJ_SET(_dest_usr_ptr, _usr_size, _src_obj) \ + panthor_set_uobj(_dest_usr_ptr, _usr_size, \ + PANTHOR_UOBJ_MIN_SIZE(_src_obj), \ + sizeof(_src_obj), &(_src_obj)) + +/** + * PANTHOR_UOBJ_GET_ARRAY() - Copy a user object array to a kernel accessible + * object array. + * @_dest_array: Local variable that will hold the newly allocated kernel + * object array. + * @_uobj_array: The drm_panthor_obj_array object describing the user object + * array. + * + * Return: 0 on success, a negative error code otherwise. + */ +#define PANTHOR_UOBJ_GET_ARRAY(_dest_array, _uobj_array) \ + ({ \ + typeof(_dest_array) _tmp; \ + _tmp = panthor_get_uobj_array(_uobj_array, \ + PANTHOR_UOBJ_MIN_SIZE((_dest_array)[0]), \ + sizeof((_dest_array)[0])); \ + if (!IS_ERR(_tmp)) \ + _dest_array = _tmp; \ + PTR_ERR_OR_ZERO(_tmp); \ + }) + +/** + * struct panthor_sync_signal - Represent a synchronization object point to attach + * our job fence to. + * + * This structure is here to keep track of fences that are currently bound to + * a specific syncobj point. + * + * At the beginning of a job submission, the fence + * is retrieved from the syncobj itself, and can be NULL if no fence was attached + * to this point. + * + * At the end, it points to the fence of the last job that had a + * %DRM_PANTHOR_SYNC_OP_SIGNAL on this syncobj. + * + * With jobs being submitted in batches, the fence might change several times during + * the process, allowing one job to wait on a job that's part of the same submission + * but appears earlier in the drm_panthor_group_submit::queue_submits array. + */ +struct panthor_sync_signal { + /** @node: list_head to track signal ops within a submit operation */ + struct list_head node; + + /** @handle: The syncobj handle. */ + u32 handle; + + /** + * @point: The syncobj point. + * + * Zero for regular syncobjs, and non-zero for timeline syncobjs. + */ + u64 point; + + /** + * @syncobj: The sync object pointed by @handle. + */ + struct drm_syncobj *syncobj; + + /** + * @chain: Chain object used to link the new fence to an existing + * timeline syncobj. + * + * NULL for regular syncobj, non-NULL for timeline syncobjs. + */ + struct dma_fence_chain *chain; + + /** + * @fence: The fence to assign to the syncobj or syncobj-point. + */ + struct dma_fence *fence; +}; + +/** + * struct panthor_job_ctx - Job context + */ +struct panthor_job_ctx { + /** @job: The job that is about to be submitted to drm_sched. */ + struct drm_sched_job *job; + + /** @syncops: Array of sync operations. */ + struct drm_panthor_sync_op *syncops; + + /** @syncop_count: Number of sync operations. */ + u32 syncop_count; +}; + +/** + * struct panthor_submit_ctx - Submission context + * + * Anything that's related to a submission (%DRM_IOCTL_PANTHOR_VM_BIND or + * %DRM_IOCTL_PANTHOR_GROUP_SUBMIT) is kept here, so we can automate the + * initialization and cleanup steps. + */ +struct panthor_submit_ctx { + /** @file: DRM file this submission happens on. */ + struct drm_file *file; + + /** + * @signals: List of struct panthor_sync_signal. + * + * %DRM_PANTHOR_SYNC_OP_SIGNAL operations will be recorded here, + * and %DRM_PANTHOR_SYNC_OP_WAIT will first check if an entry + * matching the syncobj+point exists before calling + * drm_syncobj_find_fence(). This allows us to describe dependencies + * existing between jobs that are part of the same batch. + */ + struct list_head signals; + + /** @jobs: Array of jobs. */ + struct panthor_job_ctx *jobs; + + /** @job_count: Number of entries in the @jobs array. */ + u32 job_count; + + /** @exec: drm_exec context used to acquire and prepare resv objects. */ + struct drm_exec exec; +}; + +#define PANTHOR_SYNC_OP_FLAGS_MASK \ + (DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_MASK | DRM_PANTHOR_SYNC_OP_SIGNAL) + +static bool sync_op_is_signal(const struct drm_panthor_sync_op *sync_op) +{ + return !!(sync_op->flags & DRM_PANTHOR_SYNC_OP_SIGNAL); +} + +static bool sync_op_is_wait(const struct drm_panthor_sync_op *sync_op) +{ + /* Note that DRM_PANTHOR_SYNC_OP_WAIT == 0 */ + return !(sync_op->flags & DRM_PANTHOR_SYNC_OP_SIGNAL); +} + +/** + * panthor_check_sync_op() - Check drm_panthor_sync_op fields + * @sync_op: The sync operation to check. + * + * Return: 0 on success, -EINVAL otherwise. + */ +static int +panthor_check_sync_op(const struct drm_panthor_sync_op *sync_op) +{ + u8 handle_type; + + if (sync_op->flags & ~PANTHOR_SYNC_OP_FLAGS_MASK) + return -EINVAL; + + handle_type = sync_op->flags & DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_MASK; + if (handle_type != DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_SYNCOBJ && + handle_type != DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_TIMELINE_SYNCOBJ) + return -EINVAL; + + if (handle_type == DRM_PANTHOR_SYNC_OP_HANDLE_TYPE_SYNCOBJ && + sync_op->timeline_value != 0) + return -EINVAL; + + return 0; +} + +/** + * panthor_sync_signal_free() - Release resources and free a panthor_sync_signal object + * @sig_sync: Signal object to free. + */ +static void +panthor_sync_signal_free(struct panthor_sync_signal *sig_sync) +{ + if (!sig_sync) + return; + + drm_syncobj_put(sig_sync->syncobj); + dma_fence_chain_free(sig_sync->chain); + dma_fence_put(sig_sync->fence); + kfree(sig_sync); +} + +/** + * panthor_submit_ctx_add_sync_signal() - Add a signal operation to a submit context + * @ctx: Context to add the signal operation to. + * @handle: Syncobj handle. + * @point: Syncobj point. + * + * Return: 0 on success, otherwise negative error value. + */ +static int +panthor_submit_ctx_add_sync_signal(struct panthor_submit_ctx *ctx, u32 handle, u64 point) +{ + struct panthor_sync_signal *sig_sync; + struct dma_fence *cur_fence; + int ret; + + sig_sync = kzalloc(sizeof(*sig_sync), GFP_KERNEL); + if (!sig_sync) + return -ENOMEM; + + sig_sync->handle = handle; + sig_sync->point = point; + + if (point > 0) { + sig_sync->chain = dma_fence_chain_alloc(); + if (!sig_sync->chain) { + ret = -ENOMEM; + goto err_free_sig_sync; + } + } + + sig_sync->syncobj = drm_syncobj_find(ctx->file, handle); + if (!sig_sync->syncobj) { + ret = -EINVAL; + goto err_free_sig_sync; + } + + /* Retrieve the current fence attached to that point. It's + * perfectly fine to get a NULL fence here, it just means there's + * no fence attached to that point yet. + */ + if (!drm_syncobj_find_fence(ctx->file, handle, point, 0, &cur_fence)) + sig_sync->fence = cur_fence; + + list_add_tail(&sig_sync->node, &ctx->signals); + + return 0; + +err_free_sig_sync: + panthor_sync_signal_free(sig_sync); + return ret; +} + +/** + * panthor_submit_ctx_search_sync_signal() - Search an existing signal operation in a + * submit context. + * @ctx: Context to search the signal operation in. + * @handle: Syncobj handle. + * @point: Syncobj point. + * + * Return: A valid panthor_sync_signal object if found, NULL otherwise. + */ +static struct panthor_sync_signal * +panthor_submit_ctx_search_sync_signal(struct panthor_submit_ctx *ctx, u32 handle, u64 point) +{ + struct panthor_sync_signal *sig_sync; + + list_for_each_entry(sig_sync, &ctx->signals, node) { + if (handle == sig_sync->handle && point == sig_sync->point) + return sig_sync; + } + + return NULL; +} + +/** + * panthor_submit_ctx_add_job() - Add a job to a submit context + * @ctx: Context to search the signal operation in. + * @idx: Index of the job in the context. + * @job: Job to add. + * @syncs: Sync operations provided by userspace. + * + * Return: 0 on success, a negative error code otherwise. + */ +static int +panthor_submit_ctx_add_job(struct panthor_submit_ctx *ctx, u32 idx, + struct drm_sched_job *job, + const struct drm_panthor_obj_array *syncs) +{ + int ret; + + ctx->jobs[idx].job = job; + + ret = PANTHOR_UOBJ_GET_ARRAY(ctx->jobs[idx].syncops, syncs); + if (ret) + return ret; + + ctx->jobs[idx].syncop_count = syncs->count; + return 0; +} + +/** + * panthor_submit_ctx_get_sync_signal() - Search signal operation and add one if none was found. + * @ctx: Context to search the signal operation in. + * @handle: Syncobj handle. + * @point: Syncobj point. + * + * Return: 0 on success, a negative error code otherwise. + */ +static int +panthor_submit_ctx_get_sync_signal(struct panthor_submit_ctx *ctx, u32 handle, u64 point) +{ + struct panthor_sync_signal *sig_sync; + + sig_sync = panthor_submit_ctx_search_sync_signal(ctx, handle, point); + if (sig_sync) + return 0; + + return panthor_submit_ctx_add_sync_signal(ctx, handle, point); +} + +/** + * panthor_submit_ctx_update_job_sync_signal_fences() - Update fences + * on the signal operations specified by a job. + * @ctx: Context to search the signal operation in. + * @job_idx: Index of the job to operate on. + * + * Return: 0 on success, a negative error code otherwise. + */ +static int +panthor_submit_ctx_update_job_sync_signal_fences(struct panthor_submit_ctx *ctx, + u32 job_idx) +{ + struct panthor_device *ptdev = container_of(ctx->file->minor->dev, + struct panthor_device, + base); + struct dma_fence *done_fence = &ctx->jobs[job_idx].job->s_fence->finished; + const struct drm_panthor_sync_op *sync_ops = ctx->jobs[job_idx].syncops; + u32 sync_op_count = ctx->jobs[job_idx].syncop_count; + + for (u32 i = 0; i < sync_op_count; i++) { + struct dma_fence *old_fence; + struct panthor_sync_signal *sig_sync; + + if (!sync_op_is_signal(&sync_ops[i])) + continue; + + sig_sync = panthor_submit_ctx_search_sync_signal(ctx, sync_ops[i].handle, + sync_ops[i].timeline_value); + if (drm_WARN_ON(&ptdev->base, !sig_sync)) + return -EINVAL; + + old_fence = sig_sync->fence; + sig_sync->fence = dma_fence_get(done_fence); + dma_fence_put(old_fence); + + if (drm_WARN_ON(&ptdev->base, !sig_sync->fence)) + return -EINVAL; + } + + return 0; +} + +/** + * panthor_submit_ctx_collect_job_signal_ops() - Iterate over all job signal operations + * and add them to the context. + * @ctx: Context to search the signal operation in. + * @job_idx: Index of the job to operate on. + * + * Return: 0 on success, a negative error code otherwise. + */ +static int +panthor_submit_ctx_collect_job_signal_ops(struct panthor_submit_ctx *ctx, + u32 job_idx) +{ + const struct drm_panthor_sync_op *sync_ops = ctx->jobs[job_idx].syncops; + u32 sync_op_count = ctx->jobs[job_idx].syncop_count; + + for (u32 i = 0; i < sync_op_count; i++) { + int ret; + + if (!sync_op_is_signal(&sync_ops[i])) + continue; + + ret = panthor_check_sync_op(&sync_ops[i]); + if (ret) + return ret; + + ret = panthor_submit_ctx_get_sync_signal(ctx, + sync_ops[i].handle, + sync_ops[i].timeline_value); + if (ret) + return ret; + } + + return 0; +} + +/** + * panthor_submit_ctx_push_fences() - Iterate over the signal array, and for each entry, push + * the currently assigned fence to the associated syncobj. + * @ctx: Context to push fences on. + * + * This is the last step of a submission procedure, and is done once we know the submission + * is effective and job fences are guaranteed to be signaled in finite time. + */ +static void +panthor_submit_ctx_push_fences(struct panthor_submit_ctx *ctx) +{ + struct panthor_sync_signal *sig_sync; + + list_for_each_entry(sig_sync, &ctx->signals, node) { + if (sig_sync->chain) { + drm_syncobj_add_point(sig_sync->syncobj, sig_sync->chain, + sig_sync->fence, sig_sync->point); + sig_sync->chain = NULL; + } else { + drm_syncobj_replace_fence(sig_sync->syncobj, sig_sync->fence); + } + } +} + +/** + * panthor_submit_ctx_add_sync_deps_to_job() - Add sync wait operations as + * job dependencies. + * @ctx: Submit context. + * @job_idx: Index of the job to operate on. + * + * Return: 0 on success, a negative error code otherwise. + */ +static int +panthor_submit_ctx_add_sync_deps_to_job(struct panthor_submit_ctx *ctx, + u32 job_idx) +{ + struct panthor_device *ptdev = container_of(ctx->file->minor->dev, + struct panthor_device, + base); + const struct drm_panthor_sync_op *sync_ops = ctx->jobs[job_idx].syncops; + struct drm_sched_job *job = ctx->jobs[job_idx].job; + u32 sync_op_count = ctx->jobs[job_idx].syncop_count; + int ret = 0; + + for (u32 i = 0; i < sync_op_count; i++) { + struct panthor_sync_signal *sig_sync; + struct dma_fence *fence; + + if (!sync_op_is_wait(&sync_ops[i])) + continue; + + ret = panthor_check_sync_op(&sync_ops[i]); + if (ret) + return ret; + + sig_sync = panthor_submit_ctx_search_sync_signal(ctx, sync_ops[i].handle, + sync_ops[i].timeline_value); + if (sig_sync) { + if (drm_WARN_ON(&ptdev->base, !sig_sync->fence)) + return -EINVAL; + + fence = dma_fence_get(sig_sync->fence); + } else { + ret = drm_syncobj_find_fence(ctx->file, sync_ops[i].handle, + sync_ops[i].timeline_value, + 0, &fence); + if (ret) + return ret; + } + + ret = drm_sched_job_add_dependency(job, fence); + if (ret) + return ret; + } + + return 0; +} + +/** + * panthor_submit_ctx_collect_jobs_signal_ops() - Collect all signal operations + * and add them to the submit context. + * @ctx: Submit context. + * + * Return: 0 on success, a negative error code otherwise. + */ +static int +panthor_submit_ctx_collect_jobs_signal_ops(struct panthor_submit_ctx *ctx) +{ + for (u32 i = 0; i < ctx->job_count; i++) { + int ret; + + ret = panthor_submit_ctx_collect_job_signal_ops(ctx, i); + if (ret) + return ret; + } + + return 0; +} + +/** + * panthor_submit_ctx_add_deps_and_arm_jobs() - Add jobs dependencies and arm jobs + * @ctx: Submit context. + * + * Must be called after the resv preparation has been taken care of. + * + * Return: 0 on success, a negative error code otherwise. + */ +static int +panthor_submit_ctx_add_deps_and_arm_jobs(struct panthor_submit_ctx *ctx) +{ + for (u32 i = 0; i < ctx->job_count; i++) { + int ret; + + ret = panthor_submit_ctx_add_sync_deps_to_job(ctx, i); + if (ret) + return ret; + + drm_sched_job_arm(ctx->jobs[i].job); + + ret = panthor_submit_ctx_update_job_sync_signal_fences(ctx, i); + if (ret) + return ret; + } + + return 0; +} + +/** + * panthor_submit_ctx_push_jobs() - Push jobs to their scheduling entities. + * @ctx: Submit context. + * @upd_resvs: Callback used to update reservation objects that were previously + * preapred. + */ +static void +panthor_submit_ctx_push_jobs(struct panthor_submit_ctx *ctx, + void (*upd_resvs)(struct drm_exec *, struct drm_sched_job *)) +{ + for (u32 i = 0; i < ctx->job_count; i++) { + upd_resvs(&ctx->exec, ctx->jobs[i].job); + drm_sched_entity_push_job(ctx->jobs[i].job); + + /* Job is owned by the scheduler now. */ + ctx->jobs[i].job = NULL; + } + + panthor_submit_ctx_push_fences(ctx); +} + +/** + * panthor_submit_ctx_init() - Initializes a submission context + * @ctx: Submit context to initialize. + * @file: drm_file this submission happens on. + * @job_count: Number of jobs that will be submitted. + * + * Return: 0 on success, a negative error code otherwise. + */ +static int panthor_submit_ctx_init(struct panthor_submit_ctx *ctx, + struct drm_file *file, u32 job_count) +{ + ctx->jobs = kvmalloc_array(job_count, sizeof(*ctx->jobs), + GFP_KERNEL | __GFP_ZERO); + if (!ctx->jobs) + return -ENOMEM; + + ctx->file = file; + ctx->job_count = job_count; + INIT_LIST_HEAD(&ctx->signals); + drm_exec_init(&ctx->exec, + DRM_EXEC_INTERRUPTIBLE_WAIT | DRM_EXEC_IGNORE_DUPLICATES, + 0); + return 0; +} + +/** + * panthor_submit_ctx_cleanup() - Cleanup a submission context + * @ctx: Submit context to cleanup. + * @job_put: Job put callback. + */ +static void panthor_submit_ctx_cleanup(struct panthor_submit_ctx *ctx, + void (*job_put)(struct drm_sched_job *)) +{ + struct panthor_sync_signal *sig_sync, *tmp; + unsigned long i; + + drm_exec_fini(&ctx->exec); + + list_for_each_entry_safe(sig_sync, tmp, &ctx->signals, node) + panthor_sync_signal_free(sig_sync); + + for (i = 0; i < ctx->job_count; i++) { + job_put(ctx->jobs[i].job); + kvfree(ctx->jobs[i].syncops); + } + + kvfree(ctx->jobs); +} + +static int panthor_ioctl_dev_query(struct drm_device *ddev, void *data, struct drm_file *file) +{ + struct panthor_device *ptdev = container_of(ddev, struct panthor_device, base); + struct drm_panthor_dev_query *args = data; + + if (!args->pointer) { + switch (args->type) { + case DRM_PANTHOR_DEV_QUERY_GPU_INFO: + args->size = sizeof(ptdev->gpu_info); + return 0; + + case DRM_PANTHOR_DEV_QUERY_CSIF_INFO: + args->size = sizeof(ptdev->csif_info); + return 0; + + default: + return -EINVAL; + } + } + + switch (args->type) { + case DRM_PANTHOR_DEV_QUERY_GPU_INFO: + return PANTHOR_UOBJ_SET(args->pointer, args->size, ptdev->gpu_info); + + case DRM_PANTHOR_DEV_QUERY_CSIF_INFO: + return PANTHOR_UOBJ_SET(args->pointer, args->size, ptdev->csif_info); + + default: + return -EINVAL; + } +} + +#define PANTHOR_VM_CREATE_FLAGS 0 + +static int panthor_ioctl_vm_create(struct drm_device *ddev, void *data, + struct drm_file *file) +{ + struct panthor_device *ptdev = container_of(ddev, struct panthor_device, base); + struct panthor_file *pfile = file->driver_priv; + struct drm_panthor_vm_create *args = data; + int cookie, ret; + + if (!drm_dev_enter(ddev, &cookie)) + return -ENODEV; + + ret = panthor_vm_pool_create_vm(ptdev, pfile->vms, args); + if (ret >= 0) { + args->id = ret; + ret = 0; + } + + drm_dev_exit(cookie); + return ret; +} + +static int panthor_ioctl_vm_destroy(struct drm_device *ddev, void *data, + struct drm_file *file) +{ + struct panthor_file *pfile = file->driver_priv; + struct drm_panthor_vm_destroy *args = data; + + if (args->pad) + return -EINVAL; + + return panthor_vm_pool_destroy_vm(pfile->vms, args->id); +} + +#define PANTHOR_BO_FLAGS DRM_PANTHOR_BO_NO_MMAP + +static int panthor_ioctl_bo_create(struct drm_device *ddev, void *data, + struct drm_file *file) +{ + struct panthor_file *pfile = file->driver_priv; + struct drm_panthor_bo_create *args = data; + struct panthor_vm *vm = NULL; + int cookie, ret; + + if (!drm_dev_enter(ddev, &cookie)) + return -ENODEV; + + if (!args->size || args->pad || + (args->flags & ~PANTHOR_BO_FLAGS)) { + ret = -EINVAL; + goto out_dev_exit; + } + + if (args->exclusive_vm_id) { + vm = panthor_vm_pool_get_vm(pfile->vms, args->exclusive_vm_id); + if (!vm) { + ret = -EINVAL; + goto out_dev_exit; + } + } + + ret = panthor_gem_create_with_handle(file, ddev, vm, &args->size, + args->flags, &args->handle); + + panthor_vm_put(vm); + +out_dev_exit: + drm_dev_exit(cookie); + return ret; +} + +static int panthor_ioctl_bo_mmap_offset(struct drm_device *ddev, void *data, + struct drm_file *file) +{ + struct drm_panthor_bo_mmap_offset *args = data; + struct drm_gem_object *obj; + int ret; + + if (args->pad) + return -EINVAL; + + obj = drm_gem_object_lookup(file, args->handle); + if (!obj) + return -ENOENT; + + ret = drm_gem_create_mmap_offset(obj); + if (ret) + goto out; + + args->offset = drm_vma_node_offset_addr(&obj->vma_node); + +out: + drm_gem_object_put(obj); + return ret; +} + +static int panthor_ioctl_group_submit(struct drm_device *ddev, void *data, + struct drm_file *file) +{ + struct panthor_file *pfile = file->driver_priv; + struct drm_panthor_group_submit *args = data; + struct drm_panthor_queue_submit *jobs_args; + struct panthor_submit_ctx ctx; + int ret = 0, cookie; + + if (args->pad) + return -EINVAL; + + if (!drm_dev_enter(ddev, &cookie)) + return -ENODEV; + + ret = PANTHOR_UOBJ_GET_ARRAY(jobs_args, &args->queue_submits); + if (ret) + goto out_dev_exit; + + ret = panthor_submit_ctx_init(&ctx, file, args->queue_submits.count); + if (ret) + goto out_free_jobs_args; + + /* Create jobs and attach sync operations */ + for (u32 i = 0; i < args->queue_submits.count; i++) { + const struct drm_panthor_queue_submit *qsubmit = &jobs_args[i]; + struct drm_sched_job *job; + + job = panthor_job_create(pfile, args->group_handle, qsubmit); + if (IS_ERR(job)) { + ret = PTR_ERR(job); + goto out_cleanup_submit_ctx; + } + + ret = panthor_submit_ctx_add_job(&ctx, i, job, &qsubmit->syncs); + if (ret) + goto out_cleanup_submit_ctx; + } + + /* + * Collect signal operations on all jobs, such that each job can pick + * from it for its dependencies and update the fence to signal when the + * job is submitted. + */ + ret = panthor_submit_ctx_collect_jobs_signal_ops(&ctx); + if (ret) + goto out_cleanup_submit_ctx; + + /* + * We acquire/prepare revs on all jobs before proceeding with the + * dependency registration. + * + * This is solving two problems: + * 1. drm_sched_job_arm() and drm_sched_entity_push_job() must be + * protected by a lock to make sure no concurrent access to the same + * entity get interleaved, which would mess up with the fence seqno + * ordering. Luckily, one of the resv being acquired is the VM resv, + * and a scheduling entity is only bound to a single VM. As soon as + * we acquire the VM resv, we should be safe. + * 2. Jobs might depend on fences that were issued by previous jobs in + * the same batch, so we can't add dependencies on all jobs before + * arming previous jobs and registering the fence to the signal + * array, otherwise we might miss dependencies, or point to an + * outdated fence. + */ + if (args->queue_submits.count > 0) { + /* All jobs target the same group, so they also point to the same VM. */ + struct panthor_vm *vm = panthor_job_vm(ctx.jobs[0].job); + + drm_exec_until_all_locked(&ctx.exec) { + ret = panthor_vm_prepare_mapped_bos_resvs(&ctx.exec, vm, + args->queue_submits.count); + } + + if (ret) + goto out_cleanup_submit_ctx; + } + + /* + * Now that resvs are locked/prepared, we can iterate over each job to + * add the dependencies, arm the job fence, register the job fence to + * the signal array. + */ + ret = panthor_submit_ctx_add_deps_and_arm_jobs(&ctx); + if (ret) + goto out_cleanup_submit_ctx; + + /* Nothing can fail after that point, so we can make our job fences + * visible to the outside world. Push jobs and set the job fences to + * the resv slots we reserved. This also pushes the fences to the + * syncobjs that are part of the signal array. + */ + panthor_submit_ctx_push_jobs(&ctx, panthor_job_update_resvs); + +out_cleanup_submit_ctx: + panthor_submit_ctx_cleanup(&ctx, panthor_job_put); + +out_free_jobs_args: + kvfree(jobs_args); + +out_dev_exit: + drm_dev_exit(cookie); + return ret; +} + +static int panthor_ioctl_group_destroy(struct drm_device *ddev, void *data, + struct drm_file *file) +{ + struct panthor_file *pfile = file->driver_priv; + struct drm_panthor_group_destroy *args = data; + + if (args->pad) + return -EINVAL; + + return panthor_group_destroy(pfile, args->group_handle); +} + +static int panthor_ioctl_group_create(struct drm_device *ddev, void *data, + struct drm_file *file) +{ + struct panthor_file *pfile = file->driver_priv; + struct drm_panthor_group_create *args = data; + struct drm_panthor_queue_create *queue_args; + int ret; + + if (!args->queues.count) + return -EINVAL; + + ret = PANTHOR_UOBJ_GET_ARRAY(queue_args, &args->queues); + if (ret) + return ret; + + ret = panthor_group_create(pfile, args, queue_args); + if (ret >= 0) { + args->group_handle = ret; + ret = 0; + } + + kvfree(queue_args); + return ret; +} + +static int panthor_ioctl_group_get_state(struct drm_device *ddev, void *data, + struct drm_file *file) +{ + struct panthor_file *pfile = file->driver_priv; + struct drm_panthor_group_get_state *args = data; + + return panthor_group_get_state(pfile, args); +} + +static int panthor_ioctl_tiler_heap_create(struct drm_device *ddev, void *data, + struct drm_file *file) +{ + struct panthor_file *pfile = file->driver_priv; + struct drm_panthor_tiler_heap_create *args = data; + struct panthor_heap_pool *pool; + struct panthor_vm *vm; + int ret; + + vm = panthor_vm_pool_get_vm(pfile->vms, args->vm_id); + if (!vm) + return -EINVAL; + + pool = panthor_vm_get_heap_pool(vm, true); + if (IS_ERR(pool)) { + ret = PTR_ERR(pool); + goto out_put_vm; + } + + ret = panthor_heap_create(pool, + args->initial_chunk_count, + args->chunk_size, + args->max_chunks, + args->target_in_flight, + &args->tiler_heap_ctx_gpu_va, + &args->first_heap_chunk_gpu_va); + if (ret < 0) + goto out_put_heap_pool; + + /* Heap pools are per-VM. We combine the VM and HEAP id to make + * a unique heap handle. + */ + args->handle = (args->vm_id << 16) | ret; + ret = 0; + +out_put_heap_pool: + panthor_heap_pool_put(pool); + +out_put_vm: + panthor_vm_put(vm); + return ret; +} + +static int panthor_ioctl_tiler_heap_destroy(struct drm_device *ddev, void *data, + struct drm_file *file) +{ + struct panthor_file *pfile = file->driver_priv; + struct drm_panthor_tiler_heap_destroy *args = data; + struct panthor_heap_pool *pool; + struct panthor_vm *vm; + int ret; + + if (args->pad) + return -EINVAL; + + vm = panthor_vm_pool_get_vm(pfile->vms, args->handle >> 16); + if (!vm) + return -EINVAL; + + pool = panthor_vm_get_heap_pool(vm, false); + if (IS_ERR(pool)) { + ret = PTR_ERR(pool); + goto out_put_vm; + } + + ret = panthor_heap_destroy(pool, args->handle & GENMASK(15, 0)); + panthor_heap_pool_put(pool); + +out_put_vm: + panthor_vm_put(vm); + return ret; +} + +static int panthor_ioctl_vm_bind_async(struct drm_device *ddev, + struct drm_panthor_vm_bind *args, + struct drm_file *file) +{ + struct panthor_file *pfile = file->driver_priv; + struct drm_panthor_vm_bind_op *jobs_args; + struct panthor_submit_ctx ctx; + struct panthor_vm *vm; + int ret = 0; + + vm = panthor_vm_pool_get_vm(pfile->vms, args->vm_id); + if (!vm) + return -EINVAL; + + ret = PANTHOR_UOBJ_GET_ARRAY(jobs_args, &args->ops); + if (ret) + goto out_put_vm; + + ret = panthor_submit_ctx_init(&ctx, file, args->ops.count); + if (ret) + goto out_free_jobs_args; + + for (u32 i = 0; i < args->ops.count; i++) { + struct drm_panthor_vm_bind_op *op = &jobs_args[i]; + struct drm_sched_job *job; + + job = panthor_vm_bind_job_create(file, vm, op); + if (IS_ERR(job)) { + ret = PTR_ERR(job); + goto out_cleanup_submit_ctx; + } + + ret = panthor_submit_ctx_add_job(&ctx, i, job, &op->syncs); + if (ret) + goto out_cleanup_submit_ctx; + } + + ret = panthor_submit_ctx_collect_jobs_signal_ops(&ctx); + if (ret) + goto out_cleanup_submit_ctx; + + /* Prepare reservation objects for each VM_BIND job. */ + drm_exec_until_all_locked(&ctx.exec) { + for (u32 i = 0; i < ctx.job_count; i++) { + ret = panthor_vm_bind_job_prepare_resvs(&ctx.exec, ctx.jobs[i].job); + drm_exec_retry_on_contention(&ctx.exec); + if (ret) + goto out_cleanup_submit_ctx; + } + } + + ret = panthor_submit_ctx_add_deps_and_arm_jobs(&ctx); + if (ret) + goto out_cleanup_submit_ctx; + + /* Nothing can fail after that point. */ + panthor_submit_ctx_push_jobs(&ctx, panthor_vm_bind_job_update_resvs); + +out_cleanup_submit_ctx: + panthor_submit_ctx_cleanup(&ctx, panthor_vm_bind_job_put); + +out_free_jobs_args: + kvfree(jobs_args); + +out_put_vm: + panthor_vm_put(vm); + return ret; +} + +static int panthor_ioctl_vm_bind_sync(struct drm_device *ddev, + struct drm_panthor_vm_bind *args, + struct drm_file *file) +{ + struct panthor_file *pfile = file->driver_priv; + struct drm_panthor_vm_bind_op *jobs_args; + struct panthor_vm *vm; + int ret; + + vm = panthor_vm_pool_get_vm(pfile->vms, args->vm_id); + if (!vm) + return -EINVAL; + + ret = PANTHOR_UOBJ_GET_ARRAY(jobs_args, &args->ops); + if (ret) + goto out_put_vm; + + for (u32 i = 0; i < args->ops.count; i++) { + ret = panthor_vm_bind_exec_sync_op(file, vm, &jobs_args[i]); + if (ret) { + /* Update ops.count so the user knows where things failed. */ + args->ops.count = i; + break; + } + } + + kvfree(jobs_args); + +out_put_vm: + panthor_vm_put(vm); + return ret; +} + +#define PANTHOR_VM_BIND_FLAGS DRM_PANTHOR_VM_BIND_ASYNC + +static int panthor_ioctl_vm_bind(struct drm_device *ddev, void *data, + struct drm_file *file) +{ + struct drm_panthor_vm_bind *args = data; + int cookie, ret; + + if (!drm_dev_enter(ddev, &cookie)) + return -ENODEV; + + if (args->flags & DRM_PANTHOR_VM_BIND_ASYNC) + ret = panthor_ioctl_vm_bind_async(ddev, args, file); + else + ret = panthor_ioctl_vm_bind_sync(ddev, args, file); + + drm_dev_exit(cookie); + return ret; +} + +static int panthor_ioctl_vm_get_state(struct drm_device *ddev, void *data, + struct drm_file *file) +{ + struct panthor_file *pfile = file->driver_priv; + struct drm_panthor_vm_get_state *args = data; + struct panthor_vm *vm; + + vm = panthor_vm_pool_get_vm(pfile->vms, args->vm_id); + if (!vm) + return -EINVAL; + + if (panthor_vm_is_unusable(vm)) + args->state = DRM_PANTHOR_VM_STATE_UNUSABLE; + else + args->state = DRM_PANTHOR_VM_STATE_USABLE; + + panthor_vm_put(vm); + return 0; +} + +static int +panthor_open(struct drm_device *ddev, struct drm_file *file) +{ + struct panthor_device *ptdev = container_of(ddev, struct panthor_device, base); + struct panthor_file *pfile; + int ret; + + if (!try_module_get(THIS_MODULE)) + return -EINVAL; + + pfile = kzalloc(sizeof(*pfile), GFP_KERNEL); + if (!pfile) { + ret = -ENOMEM; + goto err_put_mod; + } + + pfile->ptdev = ptdev; + + ret = panthor_vm_pool_create(pfile); + if (ret) + goto err_free_file; + + ret = panthor_group_pool_create(pfile); + if (ret) + goto err_destroy_vm_pool; + + file->driver_priv = pfile; + return 0; + +err_destroy_vm_pool: + panthor_vm_pool_destroy(pfile); + +err_free_file: + kfree(pfile); + +err_put_mod: + module_put(THIS_MODULE); + return ret; +} + +static void +panthor_postclose(struct drm_device *ddev, struct drm_file *file) +{ + struct panthor_file *pfile = file->driver_priv; + + panthor_group_pool_destroy(pfile); + panthor_vm_pool_destroy(pfile); + + kfree(pfile); + module_put(THIS_MODULE); +} + +static const struct drm_ioctl_desc panthor_drm_driver_ioctls[] = { +#define PANTHOR_IOCTL(n, func, flags) \ + DRM_IOCTL_DEF_DRV(PANTHOR_##n, panthor_ioctl_##func, flags) + + PANTHOR_IOCTL(DEV_QUERY, dev_query, DRM_RENDER_ALLOW), + PANTHOR_IOCTL(VM_CREATE, vm_create, DRM_RENDER_ALLOW), + PANTHOR_IOCTL(VM_DESTROY, vm_destroy, DRM_RENDER_ALLOW), + PANTHOR_IOCTL(VM_BIND, vm_bind, DRM_RENDER_ALLOW), + PANTHOR_IOCTL(VM_GET_STATE, vm_get_state, DRM_RENDER_ALLOW), + PANTHOR_IOCTL(BO_CREATE, bo_create, DRM_RENDER_ALLOW), + PANTHOR_IOCTL(BO_MMAP_OFFSET, bo_mmap_offset, DRM_RENDER_ALLOW), + PANTHOR_IOCTL(GROUP_CREATE, group_create, DRM_RENDER_ALLOW), + PANTHOR_IOCTL(GROUP_DESTROY, group_destroy, DRM_RENDER_ALLOW), + PANTHOR_IOCTL(GROUP_GET_STATE, group_get_state, DRM_RENDER_ALLOW), + PANTHOR_IOCTL(TILER_HEAP_CREATE, tiler_heap_create, DRM_RENDER_ALLOW), + PANTHOR_IOCTL(TILER_HEAP_DESTROY, tiler_heap_destroy, DRM_RENDER_ALLOW), + PANTHOR_IOCTL(GROUP_SUBMIT, group_submit, DRM_RENDER_ALLOW), +}; + +static int panthor_mmap(struct file *filp, struct vm_area_struct *vma) +{ + struct drm_file *file = filp->private_data; + struct panthor_file *pfile = file->driver_priv; + struct panthor_device *ptdev = pfile->ptdev; + u64 offset = (u64)vma->vm_pgoff << PAGE_SHIFT; + int ret, cookie; + + if (!drm_dev_enter(file->minor->dev, &cookie)) + return -ENODEV; + +#ifdef CONFIG_ARM64 + /* + * With 32-bit systems being limited by the 32-bit representation of + * mmap2's pgoffset field, we need to make the MMIO offset arch + * specific. This converts a user MMIO offset into something the kernel + * driver understands. + */ + if (test_tsk_thread_flag(current, TIF_32BIT) && + offset >= DRM_PANTHOR_USER_MMIO_OFFSET_32BIT) { + offset += DRM_PANTHOR_USER_MMIO_OFFSET_64BIT - + DRM_PANTHOR_USER_MMIO_OFFSET_32BIT; + vma->vm_pgoff = offset >> PAGE_SHIFT; + } +#endif + + if (offset >= DRM_PANTHOR_USER_MMIO_OFFSET) + ret = panthor_device_mmap_io(ptdev, vma); + else + ret = drm_gem_mmap(filp, vma); + + drm_dev_exit(cookie); + return ret; +} + +static const struct file_operations panthor_drm_driver_fops = { + .open = drm_open, + .release = drm_release, + .unlocked_ioctl = drm_ioctl, + .compat_ioctl = drm_compat_ioctl, + .poll = drm_poll, + .read = drm_read, + .llseek = noop_llseek, + .mmap = panthor_mmap, +}; + +#ifdef CONFIG_DEBUG_FS +static void panthor_debugfs_init(struct drm_minor *minor) +{ + panthor_mmu_debugfs_init(minor); +} +#endif + +/* + * PanCSF driver version: + * - 1.0 - initial interface + */ +static const struct drm_driver panthor_drm_driver = { + .driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ | + DRIVER_SYNCOBJ_TIMELINE | DRIVER_GEM_GPUVA, + .open = panthor_open, + .postclose = panthor_postclose, + .ioctls = panthor_drm_driver_ioctls, + .num_ioctls = ARRAY_SIZE(panthor_drm_driver_ioctls), + .fops = &panthor_drm_driver_fops, + .name = "panthor", + .desc = "Panthor DRM driver", + .date = "20230801", + .major = 1, + .minor = 0, + + .gem_create_object = panthor_gem_create_object, + .gem_prime_import_sg_table = drm_gem_shmem_prime_import_sg_table, +#ifdef CONFIG_DEBUG_FS + .debugfs_init = panthor_debugfs_init, +#endif +}; + +static int panthor_probe(struct platform_device *pdev) +{ + struct panthor_device *ptdev; + + ptdev = devm_drm_dev_alloc(&pdev->dev, &panthor_drm_driver, + struct panthor_device, base); + if (IS_ERR(ptdev)) + return -ENOMEM; + + platform_set_drvdata(pdev, ptdev); + + return panthor_device_init(ptdev); +} + +static void panthor_remove(struct platform_device *pdev) +{ + struct panthor_device *ptdev = platform_get_drvdata(pdev); + + panthor_device_unplug(ptdev); +} + +static const struct of_device_id dt_match[] = { + { .compatible = "rockchip,rk3588-mali" }, + { .compatible = "arm,mali-valhall-csf" }, + {} +}; +MODULE_DEVICE_TABLE(of, dt_match); + +static DEFINE_RUNTIME_DEV_PM_OPS(panthor_pm_ops, + panthor_device_suspend, + panthor_device_resume, + NULL); + +static struct platform_driver panthor_driver = { + .probe = panthor_probe, + .remove_new = panthor_remove, + .driver = { + .name = "panthor", + .pm = pm_ptr(&panthor_pm_ops), + .of_match_table = dt_match, + }, +}; + +/* + * Workqueue used to cleanup stuff. + * + * We create a dedicated workqueue so we can drain on unplug and + * make sure all resources are freed before the module is unloaded. + */ +struct workqueue_struct *panthor_cleanup_wq; + +static int __init panthor_init(void) +{ + int ret; + + ret = panthor_mmu_pt_cache_init(); + if (ret) + return ret; + + panthor_cleanup_wq = alloc_workqueue("panthor-cleanup", WQ_UNBOUND, 0); + if (!panthor_cleanup_wq) { + pr_err("panthor: Failed to allocate the workqueues"); + ret = -ENOMEM; + goto err_mmu_pt_cache_fini; + } + + ret = platform_driver_register(&panthor_driver); + if (ret) + goto err_destroy_cleanup_wq; + + return 0; + +err_destroy_cleanup_wq: + destroy_workqueue(panthor_cleanup_wq); + +err_mmu_pt_cache_fini: + panthor_mmu_pt_cache_fini(); + return ret; +} +module_init(panthor_init); + +static void __exit panthor_exit(void) +{ + platform_driver_unregister(&panthor_driver); + destroy_workqueue(panthor_cleanup_wq); + panthor_mmu_pt_cache_fini(); +} +module_exit(panthor_exit); + +MODULE_AUTHOR("Panthor Project Developers"); +MODULE_DESCRIPTION("Panthor DRM Driver"); +MODULE_LICENSE("Dual MIT/GPL"); |