diff --git a/drivers/accel/qaic/qaic.h b/drivers/accel/qaic/qaic.h new file mode 100644 index 000000000000..f2bd637a0d4e --- /dev/null +++ b/drivers/accel/qaic/qaic.h @@ -0,0 +1,282 @@ +/* SPDX-License-Identifier: GPL-2.0-only + * + * Copyright (c) 2019-2021, The Linux Foundation. All rights reserved. + * Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef _QAIC_H_ +#define _QAIC_H_ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define QAIC_DBC_BASE SZ_128K +#define QAIC_DBC_SIZE SZ_4K + +#define QAIC_NO_PARTITION -1 + +#define QAIC_DBC_OFF(i) ((i) * QAIC_DBC_SIZE + QAIC_DBC_BASE) + +#define to_qaic_bo(obj) container_of(obj, struct qaic_bo, base) + +extern bool datapath_polling; + +struct qaic_user { + /* Uniquely identifies this user for the device */ + int handle; + struct kref ref_count; + /* Char device opened by this user */ + struct qaic_drm_device *qddev; + /* Node in list of users that opened this drm device */ + struct list_head node; + /* SRCU used to synchronize this user during cleanup */ + struct srcu_struct qddev_lock; + atomic_t chunk_id; +}; + +struct dma_bridge_chan { + /* Pointer to device strcut maintained by driver */ + struct qaic_device *qdev; + /* ID of this DMA bridge channel(DBC) */ + unsigned int id; + /* Synchronizes access to xfer_list */ + spinlock_t xfer_lock; + /* Base address of request queue */ + void *req_q_base; + /* Base address of response queue */ + void *rsp_q_base; + /* + * Base bus address of request queue. Response queue bus address can be + * calculated by adding request queue size to this variable + */ + dma_addr_t dma_addr; + /* Total size of request and response queue in byte */ + u32 total_size; + /* Capacity of request/response queue */ + u32 nelem; + /* The user that opened this DBC */ + struct qaic_user *usr; + /* + * Request ID of next memory handle that goes in request queue. One + * memory handle can enqueue more than one request elements, all + * this requests that belong to same memory handle have same request ID + */ + u16 next_req_id; + /* true: DBC is in use; false: DBC not in use */ + bool in_use; + /* + * Base address of device registers. Used to read/write request and + * response queue's head and tail pointer of this DBC. + */ + void __iomem *dbc_base; + /* Head of list where each node is a memory handle queued in request queue */ + struct list_head xfer_list; + /* Synchronizes DBC readers during cleanup */ + struct srcu_struct ch_lock; + /* + * When this DBC is released, any thread waiting on this wait queue is + * woken up + */ + wait_queue_head_t dbc_release; + /* Head of list where each node is a bo associated with this DBC */ + struct list_head bo_lists; + /* The irq line for this DBC. Used for polling */ + unsigned int irq; + /* Polling work item to simulate interrupts */ + struct work_struct poll_work; +}; + +struct qaic_device { + /* Pointer to base PCI device struct of our physical device */ + struct pci_dev *pdev; + /* Req. ID of request that will be queued next in MHI control device */ + u32 next_seq_num; + /* Base address of bar 0 */ + void __iomem *bar_0; + /* Base address of bar 2 */ + void __iomem *bar_2; + /* Controller structure for MHI devices */ + struct mhi_controller *mhi_cntrl; + /* MHI control channel device */ + struct mhi_device *cntl_ch; + /* List of requests queued in MHI control device */ + struct list_head cntl_xfer_list; + /* Synchronizes MHI control device transactions and its xfer list */ + struct mutex cntl_mutex; + /* Array of DBC struct of this device */ + struct dma_bridge_chan *dbc; + /* Work queue for tasks related to MHI control device */ + struct workqueue_struct *cntl_wq; + /* Synchronizes all the users of device during cleanup */ + struct srcu_struct dev_lock; + /* true: Device under reset; false: Device not under reset */ + bool in_reset; + /* + * true: A tx MHI transaction has failed and a rx buffer is still queued + * in control device. Such a buffer is considered lost rx buffer + * false: No rx buffer is lost in control device + */ + bool cntl_lost_buf; + /* Maximum number of DBC supported by this device */ + u32 num_dbc; + /* Reference to the drm_device for this device when it is created */ + struct qaic_drm_device *qddev; + /* Generate the CRC of a control message */ + u32 (*gen_crc)(void *msg); + /* Validate the CRC of a control message */ + bool (*valid_crc)(void *msg); +}; + +struct qaic_drm_device { + /* Pointer to the root device struct driven by this driver */ + struct qaic_device *qdev; + /* + * The physical device can be partition in number of logical devices. + * And each logical device is given a partition id. This member stores + * that id. QAIC_NO_PARTITION is a sentinel used to mark that this drm + * device is the actual physical device + */ + s32 partition_id; + /* Pointer to the drm device struct of this drm device */ + struct drm_device *ddev; + /* Head in list of users who have opened this drm device */ + struct list_head users; + /* Synchronizes access to users list */ + struct mutex users_mutex; +}; + +struct qaic_bo { + struct drm_gem_object base; + /* Scatter/gather table for allocate/imported BO */ + struct sg_table *sgt; + /* BO size requested by user. GEM object might be bigger in size. */ + u64 size; + /* Head in list of slices of this BO */ + struct list_head slices; + /* Total nents, for all slices of this BO */ + int total_slice_nents; + /* + * Direction of transfer. It can assume only two value DMA_TO_DEVICE and + * DMA_FROM_DEVICE. + */ + int dir; + /* The pointer of the DBC which operates on this BO */ + struct dma_bridge_chan *dbc; + /* Number of slice that belongs to this buffer */ + u32 nr_slice; + /* Number of slice that have been transferred by DMA engine */ + u32 nr_slice_xfer_done; + /* true = BO is queued for execution, true = BO is not queued */ + bool queued; + /* + * If true then user has attached slicing information to this BO by + * calling DRM_IOCTL_QAIC_ATTACH_SLICE_BO ioctl. + */ + bool sliced; + /* Request ID of this BO if it is queued for execution */ + u16 req_id; + /* Handle assigned to this BO */ + u32 handle; + /* Wait on this for completion of DMA transfer of this BO */ + struct completion xfer_done; + /* + * Node in linked list where head is dbc->xfer_list. + * This link list contain BO's that are queued for DMA transfer. + */ + struct list_head xfer_list; + /* + * Node in linked list where head is dbc->bo_lists. + * This link list contain BO's that are associated with the DBC it is + * linked to. + */ + struct list_head bo_list; + struct { + /* + * Latest timestamp(ns) at which kernel received a request to + * execute this BO + */ + u64 req_received_ts; + /* + * Latest timestamp(ns) at which kernel enqueued requests of + * this BO for execution in DMA queue + */ + u64 req_submit_ts; + /* + * Latest timestamp(ns) at which kernel received a completion + * interrupt for requests of this BO + */ + u64 req_processed_ts; + /* + * Number of elements already enqueued in DMA queue before + * enqueuing requests of this BO + */ + u32 queue_level_before; + } perf_stats; + +}; + +struct bo_slice { + /* Mapped pages */ + struct sg_table *sgt; + /* Number of requests required to queue in DMA queue */ + int nents; + /* See enum dma_data_direction */ + int dir; + /* Actual requests that will be copied in DMA queue */ + struct dbc_req *reqs; + struct kref ref_count; + /* true: No DMA transfer required */ + bool no_xfer; + /* Pointer to the parent BO handle */ + struct qaic_bo *bo; + /* Node in list of slices maintained by parent BO */ + struct list_head slice; + /* Size of this slice in bytes */ + u64 size; + /* Offset of this slice in buffer */ + u64 offset; +}; + +int get_dbc_req_elem_size(void); +int get_dbc_rsp_elem_size(void); +int get_cntl_version(struct qaic_device *qdev, struct qaic_user *usr, u16 *major, u16 *minor); +int qaic_manage_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); +void qaic_mhi_ul_xfer_cb(struct mhi_device *mhi_dev, struct mhi_result *mhi_result); + +void qaic_mhi_dl_xfer_cb(struct mhi_device *mhi_dev, struct mhi_result *mhi_result); + +int qaic_control_open(struct qaic_device *qdev); +void qaic_control_close(struct qaic_device *qdev); +void qaic_release_usr(struct qaic_device *qdev, struct qaic_user *usr); + +irqreturn_t dbc_irq_threaded_fn(int irq, void *data); +irqreturn_t dbc_irq_handler(int irq, void *data); +int disable_dbc(struct qaic_device *qdev, u32 dbc_id, struct qaic_user *usr); +void enable_dbc(struct qaic_device *qdev, u32 dbc_id, struct qaic_user *usr); +void wakeup_dbc(struct qaic_device *qdev, u32 dbc_id); +void release_dbc(struct qaic_device *qdev, u32 dbc_id); + +void wake_all_cntl(struct qaic_device *qdev); +void qaic_dev_reset_clean_local_state(struct qaic_device *qdev, bool exit_reset); + +struct drm_gem_object *qaic_gem_prime_import(struct drm_device *dev, struct dma_buf *dma_buf); + +int qaic_create_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); +int qaic_mmap_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); +int qaic_attach_slice_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); +int qaic_execute_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); +int qaic_partial_execute_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); +int qaic_wait_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); +int qaic_perf_stats_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); +void irq_polling_work(struct work_struct *work); + +#endif /* _QAIC_H_ */ diff --git a/drivers/accel/qaic/qaic_drv.c b/drivers/accel/qaic/qaic_drv.c new file mode 100644 index 000000000000..1106ad88a5b6 --- /dev/null +++ b/drivers/accel/qaic/qaic_drv.c @@ -0,0 +1,647 @@ +// SPDX-License-Identifier: GPL-2.0-only + +/* Copyright (c) 2019-2021, The Linux Foundation. All rights reserved. */ +/* Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. All rights reserved. */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "mhi_controller.h" +#include "mhi_qaic_ctrl.h" +#include "qaic.h" + +MODULE_IMPORT_NS(DMA_BUF); + +#define PCI_DEV_AIC100 0xa100 +#define QAIC_NAME "qaic" +#define QAIC_DESC "Qualcomm Cloud AI Accelerators" +#define CNTL_MAJOR 5 +#define CNTL_MINOR 0 + +bool datapath_polling; +module_param(datapath_polling, bool, 0400); +MODULE_PARM_DESC(datapath_polling, "Operate the datapath in polling mode"); +static bool link_up; +static DEFINE_IDA(qaic_usrs); + +static int qaic_create_drm_device(struct qaic_device *qdev, s32 partition_id); +static void qaic_destroy_drm_device(struct qaic_device *qdev, s32 partition_id); + +static void free_usr(struct kref *kref) +{ + struct qaic_user *usr = container_of(kref, struct qaic_user, ref_count); + + cleanup_srcu_struct(&usr->qddev_lock); + ida_free(&qaic_usrs, usr->handle); + kfree(usr); +} + +static int qaic_open(struct drm_device *dev, struct drm_file *file) +{ + struct qaic_drm_device *qddev = dev->dev_private; + struct qaic_device *qdev = qddev->qdev; + struct qaic_user *usr; + int rcu_id; + int ret; + + rcu_id = srcu_read_lock(&qdev->dev_lock); + if (qdev->in_reset) { + ret = -ENODEV; + goto dev_unlock; + } + + usr = kmalloc(sizeof(*usr), GFP_KERNEL); + if (!usr) { + ret = -ENOMEM; + goto dev_unlock; + } + + usr->handle = ida_alloc(&qaic_usrs, GFP_KERNEL); + if (usr->handle < 0) { + ret = usr->handle; + goto free_usr; + } + usr->qddev = qddev; + atomic_set(&usr->chunk_id, 0); + init_srcu_struct(&usr->qddev_lock); + kref_init(&usr->ref_count); + + ret = mutex_lock_interruptible(&qddev->users_mutex); + if (ret) + goto cleanup_usr; + + list_add(&usr->node, &qddev->users); + mutex_unlock(&qddev->users_mutex); + + file->driver_priv = usr; + + srcu_read_unlock(&qdev->dev_lock, rcu_id); + return 0; + +cleanup_usr: + cleanup_srcu_struct(&usr->qddev_lock); +free_usr: + kfree(usr); +dev_unlock: + srcu_read_unlock(&qdev->dev_lock, rcu_id); + return ret; +} + +static void qaic_postclose(struct drm_device *dev, struct drm_file *file) +{ + struct qaic_user *usr = file->driver_priv; + struct qaic_drm_device *qddev; + struct qaic_device *qdev; + int qdev_rcu_id; + int usr_rcu_id; + int i; + + qddev = usr->qddev; + usr_rcu_id = srcu_read_lock(&usr->qddev_lock); + if (qddev) { + qdev = qddev->qdev; + qdev_rcu_id = srcu_read_lock(&qdev->dev_lock); + if (!qdev->in_reset) { + qaic_release_usr(qdev, usr); + for (i = 0; i < qdev->num_dbc; ++i) + if (qdev->dbc[i].usr && qdev->dbc[i].usr->handle == usr->handle) + release_dbc(qdev, i); + } + srcu_read_unlock(&qdev->dev_lock, qdev_rcu_id); + + mutex_lock(&qddev->users_mutex); + if (!list_empty(&usr->node)) + list_del_init(&usr->node); + mutex_unlock(&qddev->users_mutex); + } + + srcu_read_unlock(&usr->qddev_lock, usr_rcu_id); + kref_put(&usr->ref_count, free_usr); + + file->driver_priv = NULL; +} + +DEFINE_DRM_ACCEL_FOPS(qaic_accel_fops); + +static const struct drm_ioctl_desc qaic_drm_ioctls[] = { + DRM_IOCTL_DEF_DRV(QAIC_MANAGE, qaic_manage_ioctl, 0), + DRM_IOCTL_DEF_DRV(QAIC_CREATE_BO, qaic_create_bo_ioctl, 0), + DRM_IOCTL_DEF_DRV(QAIC_MMAP_BO, qaic_mmap_bo_ioctl, 0), + DRM_IOCTL_DEF_DRV(QAIC_ATTACH_SLICE_BO, qaic_attach_slice_bo_ioctl, 0), + DRM_IOCTL_DEF_DRV(QAIC_EXECUTE_BO, qaic_execute_bo_ioctl, 0), + DRM_IOCTL_DEF_DRV(QAIC_PARTIAL_EXECUTE_BO, qaic_partial_execute_bo_ioctl, 0), + DRM_IOCTL_DEF_DRV(QAIC_WAIT_BO, qaic_wait_bo_ioctl, 0), + DRM_IOCTL_DEF_DRV(QAIC_PERF_STATS_BO, qaic_perf_stats_bo_ioctl, 0), +}; + +static const struct drm_driver qaic_accel_driver = { + .driver_features = DRIVER_GEM | DRIVER_COMPUTE_ACCEL, + + .name = QAIC_NAME, + .desc = QAIC_DESC, + .date = "20190618", + + .fops = &qaic_accel_fops, + .open = qaic_open, + .postclose = qaic_postclose, + + .ioctls = qaic_drm_ioctls, + .num_ioctls = ARRAY_SIZE(qaic_drm_ioctls), + .prime_fd_to_handle = drm_gem_prime_fd_to_handle, + .gem_prime_import = qaic_gem_prime_import, +}; + +static int qaic_create_drm_device(struct qaic_device *qdev, s32 partition_id) +{ + struct qaic_drm_device *qddev; + struct drm_device *ddev; + struct device *pdev; + int ret; + + /* Hold off implementing partitions until the uapi is determined */ + if (partition_id != QAIC_NO_PARTITION) + return -EINVAL; + + pdev = &qdev->pdev->dev; + + qddev = kzalloc(sizeof(*qddev), GFP_KERNEL); + if (!qddev) + return -ENOMEM; + + ddev = drm_dev_alloc(&qaic_accel_driver, pdev); + if (IS_ERR(ddev)) { + ret = PTR_ERR(ddev); + goto ddev_fail; + } + + ddev->dev_private = qddev; + qddev->ddev = ddev; + + qddev->qdev = qdev; + qddev->partition_id = partition_id; + INIT_LIST_HEAD(&qddev->users); + mutex_init(&qddev->users_mutex); + + qdev->qddev = qddev; + + ret = drm_dev_register(ddev, 0); + if (ret) { + pci_dbg(qdev->pdev, "%s: drm_dev_register failed %d\n", __func__, ret); + goto drm_reg_fail; + } + + return 0; + +drm_reg_fail: + mutex_destroy(&qddev->users_mutex); + qdev->qddev = NULL; + drm_dev_put(ddev); +ddev_fail: + kfree(qddev); + return ret; +} + +static void qaic_destroy_drm_device(struct qaic_device *qdev, s32 partition_id) +{ + struct qaic_drm_device *qddev; + struct qaic_user *usr; + + qddev = qdev->qddev; + + /* + * Existing users get unresolvable errors till they close FDs. + * Need to sync carefully with users calling close(). The + * list of users can be modified elsewhere when the lock isn't + * held here, but the sync'ing the srcu with the mutex held + * could deadlock. Grab the mutex so that the list will be + * unmodified. The user we get will exist as long as the + * lock is held. Signal that the qcdev is going away, and + * grab a reference to the user so they don't go away for + * synchronize_srcu(). Then release the mutex to avoid + * deadlock and make sure the user has observed the signal. + * With the lock released, we cannot maintain any state of the + * user list. + */ + mutex_lock(&qddev->users_mutex); + while (!list_empty(&qddev->users)) { + usr = list_first_entry(&qddev->users, struct qaic_user, node); + list_del_init(&usr->node); + kref_get(&usr->ref_count); + usr->qddev = NULL; + mutex_unlock(&qddev->users_mutex); + synchronize_srcu(&usr->qddev_lock); + kref_put(&usr->ref_count, free_usr); + mutex_lock(&qddev->users_mutex); + } + mutex_unlock(&qddev->users_mutex); + + if (qddev->ddev) { + drm_dev_unregister(qddev->ddev); + drm_dev_put(qddev->ddev); + } + + kfree(qddev); +} + +static int qaic_mhi_probe(struct mhi_device *mhi_dev, const struct mhi_device_id *id) +{ + struct qaic_device *qdev; + u16 major, minor; + int ret; + + /* + * Invoking this function indicates that the control channel to the + * device is available. We use that as a signal to indicate that + * the device side firmware has booted. The device side firmware + * manages the device resources, so we need to communicate with it + * via the control channel in order to utilize the device. Therefore + * we wait until this signal to create the drm dev that userspace will + * use to control the device, because without the device side firmware, + * userspace can't do anything useful. + */ + + qdev = pci_get_drvdata(to_pci_dev(mhi_dev->mhi_cntrl->cntrl_dev)); + + qdev->in_reset = false; + + dev_set_drvdata(&mhi_dev->dev, qdev); + qdev->cntl_ch = mhi_dev; + + ret = qaic_control_open(qdev); + if (ret) { + pci_dbg(qdev->pdev, "%s: control_open failed %d\n", __func__, ret); + return ret; + } + + ret = get_cntl_version(qdev, NULL, &major, &minor); + if (ret || major != CNTL_MAJOR || minor > CNTL_MINOR) { + pci_err(qdev->pdev, "%s: Control protocol version (%d.%d) not supported. Supported version is (%d.%d). Ret: %d\n", + __func__, major, minor, CNTL_MAJOR, CNTL_MINOR, ret); + ret = -EINVAL; + goto close_control; + } + + ret = qaic_create_drm_device(qdev, QAIC_NO_PARTITION); + + return ret; + +close_control: + qaic_control_close(qdev); + return ret; +} + +static void qaic_mhi_remove(struct mhi_device *mhi_dev) +{ +/* This is redundant since we have already observed the device crash */ +} + +static void qaic_notify_reset(struct qaic_device *qdev) +{ + int i; + + qdev->in_reset = true; + /* wake up any waiters to avoid waiting for timeouts at sync */ + wake_all_cntl(qdev); + for (i = 0; i < qdev->num_dbc; ++i) + wakeup_dbc(qdev, i); + synchronize_srcu(&qdev->dev_lock); +} + +void qaic_dev_reset_clean_local_state(struct qaic_device *qdev, bool exit_reset) +{ + int i; + + qaic_notify_reset(qdev); + + /* remove drmdevs to prevent new users from coming in */ + qaic_destroy_drm_device(qdev, QAIC_NO_PARTITION); + + /* start tearing things down */ + for (i = 0; i < qdev->num_dbc; ++i) + release_dbc(qdev, i); + + if (exit_reset) + qdev->in_reset = false; +} + +static struct qaic_device *create_qdev(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct qaic_device *qdev; + int i; + + qdev = devm_kzalloc(&pdev->dev, sizeof(*qdev), GFP_KERNEL); + if (!qdev) + return NULL; + + if (id->device == PCI_DEV_AIC100) { + qdev->num_dbc = 16; + qdev->dbc = devm_kcalloc(&pdev->dev, qdev->num_dbc, sizeof(*qdev->dbc), GFP_KERNEL); + if (!qdev->dbc) + return NULL; + } + + qdev->cntl_wq = alloc_workqueue("qaic_cntl", WQ_UNBOUND, 0); + if (!qdev->cntl_wq) + return NULL; + + pci_set_drvdata(pdev, qdev); + qdev->pdev = pdev; + + mutex_init(&qdev->cntl_mutex); + INIT_LIST_HEAD(&qdev->cntl_xfer_list); + init_srcu_struct(&qdev->dev_lock); + + for (i = 0; i < qdev->num_dbc; ++i) { + spin_lock_init(&qdev->dbc[i].xfer_lock); + qdev->dbc[i].qdev = qdev; + qdev->dbc[i].id = i; + INIT_LIST_HEAD(&qdev->dbc[i].xfer_list); + init_srcu_struct(&qdev->dbc[i].ch_lock); + init_waitqueue_head(&qdev->dbc[i].dbc_release); + INIT_LIST_HEAD(&qdev->dbc[i].bo_lists); + } + + return qdev; +} + +static void cleanup_qdev(struct qaic_device *qdev) +{ + int i; + + for (i = 0; i < qdev->num_dbc; ++i) + cleanup_srcu_struct(&qdev->dbc[i].ch_lock); + cleanup_srcu_struct(&qdev->dev_lock); + pci_set_drvdata(qdev->pdev, NULL); + destroy_workqueue(qdev->cntl_wq); +} + +static int init_pci(struct qaic_device *qdev, struct pci_dev *pdev) +{ + int bars; + int ret; + + bars = pci_select_bars(pdev, IORESOURCE_MEM); + + /* make sure the device has the expected BARs */ + if (bars != (BIT(0) | BIT(2) | BIT(4))) { + pci_dbg(pdev, "%s: expected BARs 0, 2, and 4 not found in device. Found 0x%x\n", + __func__, bars); + return -EINVAL; + } + + ret = pcim_enable_device(pdev); + if (ret) + return ret; + + ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); + if (ret) + return ret; + ret = dma_set_max_seg_size(&pdev->dev, UINT_MAX); + if (ret) + return ret; + + qdev->bar_0 = devm_ioremap_resource(&pdev->dev, &pdev->resource[0]); + if (IS_ERR(qdev->bar_0)) + return PTR_ERR(qdev->bar_0); + + qdev->bar_2 = devm_ioremap_resource(&pdev->dev, &pdev->resource[2]); + if (IS_ERR(qdev->bar_2)) + return PTR_ERR(qdev->bar_2); + + /* Managed release since we use pcim_enable_device above */ + pci_set_master(pdev); + + return 0; +} + +static int init_msi(struct qaic_device *qdev, struct pci_dev *pdev) +{ + int mhi_irq; + int ret; + int i; + + /* Managed release since we use pcim_enable_device */ + ret = pci_alloc_irq_vectors(pdev, 1, 32, PCI_IRQ_MSI); + if (ret < 0) + return ret; + + if (ret < 32) { + pci_err(pdev, "%s: Requested 32 MSIs. Obtained %d MSIs which is less than the 32 required.\n", + __func__, ret); + return -ENODEV; + } + + mhi_irq = pci_irq_vector(pdev, 0); + if (mhi_irq < 0) + return mhi_irq; + + for (i = 0; i < qdev->num_dbc; ++i) { + ret = devm_request_threaded_irq(&pdev->dev, pci_irq_vector(pdev, i + 1), + dbc_irq_handler, dbc_irq_threaded_fn, IRQF_SHARED, + "qaic_dbc", &qdev->dbc[i]); + if (ret) + return ret; + + if (datapath_polling) { + qdev->dbc[i].irq = pci_irq_vector(pdev, i + 1); + disable_irq_nosync(qdev->dbc[i].irq); + INIT_WORK(&qdev->dbc[i].poll_work, irq_polling_work); + } + } + + return mhi_irq; +} + +static int qaic_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct qaic_device *qdev; + int mhi_irq; + int ret; + int i; + + qdev = create_qdev(pdev, id); + if (!qdev) + return -ENOMEM; + + ret = init_pci(qdev, pdev); + if (ret) + goto cleanup_qdev; + + for (i = 0; i < qdev->num_dbc; ++i) + qdev->dbc[i].dbc_base = qdev->bar_2 + QAIC_DBC_OFF(i); + + mhi_irq = init_msi(qdev, pdev); + if (mhi_irq < 0) { + ret = mhi_irq; + goto cleanup_qdev; + } + + qdev->mhi_cntrl = qaic_mhi_register_controller(pdev, qdev->bar_0, mhi_irq); + if (IS_ERR(qdev->mhi_cntrl)) { + ret = PTR_ERR(qdev->mhi_cntrl); + goto cleanup_qdev; + } + + return 0; + +cleanup_qdev: + cleanup_qdev(qdev); + return ret; +} + +static void qaic_pci_remove(struct pci_dev *pdev) +{ + struct qaic_device *qdev = pci_get_drvdata(pdev); + + if (!qdev) + return; + + qaic_dev_reset_clean_local_state(qdev, false); + qaic_mhi_free_controller(qdev->mhi_cntrl, link_up); + cleanup_qdev(qdev); +} + +static void qaic_pci_shutdown(struct pci_dev *pdev) +{ + /* see qaic_exit for what link_up is doing */ + link_up = true; + qaic_pci_remove(pdev); +} + +static pci_ers_result_t qaic_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t error) +{ + return PCI_ERS_RESULT_NEED_RESET; +} + +static void qaic_pci_reset_prepare(struct pci_dev *pdev) +{ + struct qaic_device *qdev = pci_get_drvdata(pdev); + + qaic_notify_reset(qdev); + qaic_mhi_start_reset(qdev->mhi_cntrl); + qaic_dev_reset_clean_local_state(qdev, false); +} + +static void qaic_pci_reset_done(struct pci_dev *pdev) +{ + struct qaic_device *qdev = pci_get_drvdata(pdev); + + qdev->in_reset = false; + qaic_mhi_reset_done(qdev->mhi_cntrl); +} + +static const struct mhi_device_id qaic_mhi_match_table[] = { + { .chan = "QAIC_CONTROL", }, + {}, +}; + +static struct mhi_driver qaic_mhi_driver = { + .id_table = qaic_mhi_match_table, + .remove = qaic_mhi_remove, + .probe = qaic_mhi_probe, + .ul_xfer_cb = qaic_mhi_ul_xfer_cb, + .dl_xfer_cb = qaic_mhi_dl_xfer_cb, + .driver = { + .name = "qaic_mhi", + }, +}; + +static const struct pci_device_id qaic_ids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_QCOM, PCI_DEV_AIC100), }, + { } +}; +MODULE_DEVICE_TABLE(pci, qaic_ids); + +static const struct pci_error_handlers qaic_pci_err_handler = { + .error_detected = qaic_pci_error_detected, + .reset_prepare = qaic_pci_reset_prepare, + .reset_done = qaic_pci_reset_done, +}; + +static struct pci_driver qaic_pci_driver = { + .name = QAIC_NAME, + .id_table = qaic_ids, + .probe = qaic_pci_probe, + .remove = qaic_pci_remove, + .shutdown = qaic_pci_shutdown, + .err_handler = &qaic_pci_err_handler, +}; + +static int __init qaic_init(void) +{ + int ret; + + ret = mhi_driver_register(&qaic_mhi_driver); + if (ret) { + pr_debug("qaic: mhi_driver_register failed %d\n", ret); + return ret; + } + + ret = pci_register_driver(&qaic_pci_driver); + if (ret) { + pr_debug("qaic: pci_register_driver failed %d\n", ret); + goto free_mhi; + } + + ret = mhi_qaic_ctrl_init(); + if (ret) { + pr_debug("qaic: mhi_qaic_ctrl_init failed %d\n", ret); + goto free_pci; + } + + return 0; + +free_pci: + pci_unregister_driver(&qaic_pci_driver); +free_mhi: + mhi_driver_unregister(&qaic_mhi_driver); + return ret; +} + +static void __exit qaic_exit(void) +{ + /* + * We assume that qaic_pci_remove() is called due to a hotplug event + * which would mean that the link is down, and thus + * qaic_mhi_free_controller() should not try to access the device during + * cleanup. + * We call pci_unregister_driver() below, which also triggers + * qaic_pci_remove(), but since this is module exit, we expect the link + * to the device to be up, in which case qaic_mhi_free_controller() + * should try to access the device during cleanup to put the device in + * a sane state. + * For that reason, we set link_up here to let qaic_mhi_free_controller + * know the expected link state. Since the module is going to be + * removed at the end of this, we don't need to worry about + * reinitializing the link_up state after the cleanup is done. + */ + link_up = true; + mhi_qaic_ctrl_deinit(); + pci_unregister_driver(&qaic_pci_driver); + mhi_driver_unregister(&qaic_mhi_driver); +} + +module_init(qaic_init); +module_exit(qaic_exit); + +MODULE_AUTHOR(QAIC_DESC " Kernel Driver Team"); +MODULE_DESCRIPTION(QAIC_DESC " Accel Driver"); +MODULE_LICENSE("GPL"); diff --git a/include/uapi/drm/qaic_accel.h b/include/uapi/drm/qaic_accel.h new file mode 100644 index 000000000000..2d348744a853 --- /dev/null +++ b/include/uapi/drm/qaic_accel.h @@ -0,0 +1,397 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note + * + * Copyright (c) 2019-2020, The Linux Foundation. All rights reserved. + * Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef QAIC_ACCEL_H_ +#define QAIC_ACCEL_H_ + +#include "drm.h" + +#if defined(__cplusplus) +extern "C" { +#endif + +/* The length(4K) includes len and count fields of qaic_manage_msg */ +#define QAIC_MANAGE_MAX_MSG_LENGTH SZ_4K + +/* semaphore flags */ +#define QAIC_SEM_INSYNCFENCE 2 +#define QAIC_SEM_OUTSYNCFENCE 1 + +/* Semaphore commands */ +#define QAIC_SEM_NOP 0 +#define QAIC_SEM_INIT 1 +#define QAIC_SEM_INC 2 +#define QAIC_SEM_DEC 3 +#define QAIC_SEM_WAIT_EQUAL 4 +#define QAIC_SEM_WAIT_GT_EQ 5 /* Greater than or equal */ +#define QAIC_SEM_WAIT_GT_0 6 /* Greater than 0 */ + +#define QAIC_TRANS_UNDEFINED 0 +#define QAIC_TRANS_PASSTHROUGH_FROM_USR 1 +#define QAIC_TRANS_PASSTHROUGH_TO_USR 2 +#define QAIC_TRANS_PASSTHROUGH_FROM_DEV 3 +#define QAIC_TRANS_PASSTHROUGH_TO_DEV 4 +#define QAIC_TRANS_DMA_XFER_FROM_USR 5 +#define QAIC_TRANS_DMA_XFER_TO_DEV 6 +#define QAIC_TRANS_ACTIVATE_FROM_USR 7 +#define QAIC_TRANS_ACTIVATE_FROM_DEV 8 +#define QAIC_TRANS_ACTIVATE_TO_DEV 9 +#define QAIC_TRANS_DEACTIVATE_FROM_USR 10 +#define QAIC_TRANS_DEACTIVATE_FROM_DEV 11 +#define QAIC_TRANS_STATUS_FROM_USR 12 +#define QAIC_TRANS_STATUS_TO_USR 13 +#define QAIC_TRANS_STATUS_FROM_DEV 14 +#define QAIC_TRANS_STATUS_TO_DEV 15 +#define QAIC_TRANS_TERMINATE_FROM_DEV 16 +#define QAIC_TRANS_TERMINATE_TO_DEV 17 +#define QAIC_TRANS_DMA_XFER_CONT 18 +#define QAIC_TRANS_VALIDATE_PARTITION_FROM_DEV 19 +#define QAIC_TRANS_VALIDATE_PARTITION_TO_DEV 20 + +/** + * struct qaic_manage_trans_hdr - Header for a transaction in a manage message. + * @type: In. Identifies this transaction. See QAIC_TRANS_* defines. + * @len: In. Length of this transaction, including this header. + */ +struct qaic_manage_trans_hdr { + __u32 type; + __u32 len; +}; + +/** + * struct qaic_manage_trans_passthrough - Defines a passthrough transaction. + * @hdr: In. Header to identify this transaction. + * @data: In. Payload of this ransaction. Opaque to the driver. Userspace must + * encode in little endian and align/pad to 64-bit. + */ +struct qaic_manage_trans_passthrough { + struct qaic_manage_trans_hdr hdr; + __u8 data[]; +}; + +/** + * struct qaic_manage_trans_dma_xfer - Defines a DMA transfer transaction. + * @hdr: In. Header to identify this transaction. + * @tag: In. Identified this transfer in other transactions. Opaque to the + * driver. + * @pad: Structure padding. + * @addr: In. Address of the data to DMA to the device. + * @size: In. Length of the data to DMA to the device. + */ +struct qaic_manage_trans_dma_xfer { + struct qaic_manage_trans_hdr hdr; + __u32 tag; + __u32 pad; + __u64 addr; + __u64 size; +}; + +/** + * struct qaic_manage_trans_activate_to_dev - Defines an activate request. + * @hdr: In. Header to identify this transaction. + * @queue_size: In. Number of elements for DBC request and response queues. + * @eventfd: Unused. + * @options: In. Device specific options for this activate. + * @pad: Structure padding. Must be 0. + */ +struct qaic_manage_trans_activate_to_dev { + struct qaic_manage_trans_hdr hdr; + __u32 queue_size; + __u32 eventfd; + __u32 options; + __u32 pad; +}; + +/** + * struct qaic_manage_trans_activate_from_dev - Defines an activate response. + * @hdr: Out. Header to identify this transaction. + * @status: Out. Return code of the request from the device. + * @dbc_id: Out. Id of the assigned DBC for successful request. + * @options: Out. Device specific options for this activate. + */ +struct qaic_manage_trans_activate_from_dev { + struct qaic_manage_trans_hdr hdr; + __u32 status; + __u32 dbc_id; + __u64 options; +}; + +/** + * struct qaic_manage_trans_deactivate - Defines a deactivate request. + * @hdr: In. Header to identify this transaction. + * @dbc_id: In. Id of assigned DBC. + * @pad: Structure padding. Must be 0. + */ +struct qaic_manage_trans_deactivate { + struct qaic_manage_trans_hdr hdr; + __u32 dbc_id; + __u32 pad; +}; + +/** + * struct qaic_manage_trans_status_to_dev - Defines a status request. + * @hdr: In. Header to identify this transaction. + */ +struct qaic_manage_trans_status_to_dev { + struct qaic_manage_trans_hdr hdr; +}; + +/** + * struct qaic_manage_trans_status_from_dev - Defines a status response. + * @hdr: Out. Header to identify this transaction. + * @major: Out. NNC protocol version major number. + * @minor: Out. NNC protocol version minor number. + * @status: Out. Return code from device. + * @status_flags: Out. Flags from device. Bit 0 indicates if CRCs are required. + */ +struct qaic_manage_trans_status_from_dev { + struct qaic_manage_trans_hdr hdr; + __u16 major; + __u16 minor; + __u32 status; + __u64 status_flags; +}; + +/** + * struct qaic_manage_msg - Defines a message to the device. + * @len: In. Length of all the transactions contained within this message. + * @count: In. Number of transactions in this message. + * @data: In. Address to an array where the transactions can be found. + */ +struct qaic_manage_msg { + __u32 len; + __u32 count; + __u64 data; +}; + +/** + * struct qaic_create_bo - Defines a request to create a buffer object. + * @size: In. Size of the buffer in bytes. + * @handle: Out. GEM handle for the BO. + * @pad: Structure padding. Must be 0. + */ +struct qaic_create_bo { + __u64 size; + __u32 handle; + __u32 pad; +}; + +/** + * struct qaic_mmap_bo - Defines a request to prepare a BO for mmap(). + * @handle: In. Handle of the GEM BO to prepare for mmap(). + * @pad: Structure padding. Must be 0. + * @offset: Out. Offset value to provide to mmap(). + */ +struct qaic_mmap_bo { + __u32 handle; + __u32 pad; + __u64 offset; +}; + +/** + * struct qaic_sem - Defines a semaphore command for a BO slice. + * @val: In. Only lower 12 bits are valid. + * @index: In. Only lower 5 bits are valid. + * @presync: In. 1 if presync operation, 0 if postsync. + * @cmd: In. One of QAIC_SEM_*. + * @flags: In. Bitfield. See QAIC_SEM_INSYNCFENCE and QAIC_SEM_OUTSYNCFENCE + * @pad: Structure padding. Must be 0. + */ +struct qaic_sem { + __u16 val; + __u8 index; + __u8 presync; + __u8 cmd; + __u8 flags; + __u16 pad; +}; + +/** + * struct qaic_attach_slice_entry - Defines a single BO slice. + * @size: In. Size of this slice in bytes. + * @sem0: In. Semaphore command 0. Must be 0 is not valid. + * @sem1: In. Semaphore command 1. Must be 0 is not valid. + * @sem2: In. Semaphore command 2. Must be 0 is not valid. + * @sem3: In. Semaphore command 3. Must be 0 is not valid. + * @dev_addr: In. Device address this slice pushes to or pulls from. + * @db_addr: In. Address of the doorbell to ring. + * @db_data: In. Data to write to the doorbell. + * @db_len: In. Size of the doorbell data in bits - 32, 16, or 8. 0 is for + * inactive doorbells. + * @offset: In. Start of this slice as an offset from the start of the BO. + */ +struct qaic_attach_slice_entry { + __u64 size; + struct qaic_sem sem0; + struct qaic_sem sem1; + struct qaic_sem sem2; + struct qaic_sem sem3; + __u64 dev_addr; + __u64 db_addr; + __u32 db_data; + __u32 db_len; + __u64 offset; +}; + +/** + * struct qaic_attach_slice_hdr - Defines metadata for a set of BO slices. + * @count: In. Number of slices for this BO. + * @dbc_id: In. Associate the sliced BO with this DBC. + * @handle: In. GEM handle of the BO to slice. + * @dir: In. Direction of data flow. 1 = DMA_TO_DEVICE, 2 = DMA_FROM_DEVICE + * @size: In. Total length of the BO. + * If BO is imported (DMABUF/PRIME) then this size + * should not exceed the size of DMABUF provided. + * If BO is allocated using DRM_IOCTL_QAIC_CREATE_BO + * then this size should be exactly same as the size + * provided during DRM_IOCTL_QAIC_CREATE_BO. + * @dev_addr: In. Device address this slice pushes to or pulls from. + * @db_addr: In. Address of the doorbell to ring. + * @db_data: In. Data to write to the doorbell. + * @db_len: In. Size of the doorbell data in bits - 32, 16, or 8. 0 is for + * inactive doorbells. + * @offset: In. Start of this slice as an offset from the start of the BO. + */ +struct qaic_attach_slice_hdr { + __u32 count; + __u32 dbc_id; + __u32 handle; + __u32 dir; + __u64 size; +}; + +/** + * struct qaic_attach_slice - Defines a set of BO slices. + * @hdr: In. Metadata of the set of slices. + * @data: In. Pointer to an array containing the slice definitions. + */ +struct qaic_attach_slice { + struct qaic_attach_slice_hdr hdr; + __u64 data; +}; + +/** + * struct qaic_execute_entry - Defines a BO to submit to the device. + * @handle: In. GEM handle of the BO to commit to the device. + * @dir: In. Direction of data. 1 = to device, 2 = from device. + */ +struct qaic_execute_entry { + __u32 handle; + __u32 dir; +}; + +/** + * struct qaic_partial_execute_entry - Defines a BO to resize and submit. + * @handle: In. GEM handle of the BO to commit to the device. + * @dir: In. Direction of data. 1 = to device, 2 = from device. + * @resize: In. New size of the BO. Must be <= the original BO size. 0 is + * short for no resize. + */ +struct qaic_partial_execute_entry { + __u32 handle; + __u32 dir; + __u64 resize; +}; + +/** + * struct qaic_execute_hdr - Defines metadata for BO submission. + * @count: In. Number of BOs to submit. + * @dbc_id: In. DBC to submit the BOs on. + */ +struct qaic_execute_hdr { + __u32 count; + __u32 dbc_id; +}; + +/** + * struct qaic_execute - Defines a list of BOs to submit to the device. + * @hdr: In. BO list metadata. + * @data: In. Pointer to an array of BOs to submit. + */ +struct qaic_execute { + struct qaic_execute_hdr hdr; + __u64 data; +}; + +/** + * struct qaic_wait - Defines a blocking wait for BO execution. + * @handle: In. GEM handle of the BO to wait on. + * @timeout: In. Maximum time in ms to wait for the BO. + * @dbc_id: In. DBC the BO is submitted to. + * @pad: Structure padding. Must be 0. + */ +struct qaic_wait { + __u32 handle; + __u32 timeout; + __u32 dbc_id; + __u32 pad; +}; + +/** + * struct qaic_perf_stats_hdr - Defines metadata for getting BO perf info. + * @count: In. Number of BOs requested. + * @pad: Structure padding. Must be 0. + * @dbc_id: In. DBC the BO are associated with. + */ +struct qaic_perf_stats_hdr { + __u16 count; + __u16 pad; + __u32 dbc_id; +}; + +/** + * struct qaic_perf_stats - Defines a request for getting BO perf info. + * @hdr: In. Request metadata + * @data: In. Pointer to array of stats structures that will receive the data. + */ +struct qaic_perf_stats { + struct qaic_perf_stats_hdr hdr; + __u64 data; +}; + +/** + * struct qaic_perf_stats_entry - Defines a BO perf info. + * @handle: In. GEM handle of the BO to get perf stats for. + * @queue_level_before: Out. Number of elements in the queue before this BO + * was submitted. + * @num_queue_element: Out. Number of elements added to the queue to submit + * this BO. + * @submit_latency_us: Out. Time taken by the driver to submit this BO. + * @device_latency_us: Out. Time taken by the device to execute this BO. + * @pad: Structure padding. Must be 0. + */ +struct qaic_perf_stats_entry { + __u32 handle; + __u32 queue_level_before; + __u32 num_queue_element; + __u32 submit_latency_us; + __u32 device_latency_us; + __u32 pad; +}; + +#define DRM_QAIC_MANAGE 0x00 +#define DRM_QAIC_CREATE_BO 0x01 +#define DRM_QAIC_MMAP_BO 0x02 +#define DRM_QAIC_ATTACH_SLICE_BO 0x03 +#define DRM_QAIC_EXECUTE_BO 0x04 +#define DRM_QAIC_PARTIAL_EXECUTE_BO 0x05 +#define DRM_QAIC_WAIT_BO 0x06 +#define DRM_QAIC_PERF_STATS_BO 0x07 + +#define DRM_IOCTL_QAIC_MANAGE DRM_IOWR(DRM_COMMAND_BASE + DRM_QAIC_MANAGE, struct qaic_manage_msg) +#define DRM_IOCTL_QAIC_CREATE_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_QAIC_CREATE_BO, struct qaic_create_bo) +#define DRM_IOCTL_QAIC_MMAP_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_QAIC_MMAP_BO, struct qaic_mmap_bo) +#define DRM_IOCTL_QAIC_ATTACH_SLICE_BO DRM_IOW(DRM_COMMAND_BASE + DRM_QAIC_ATTACH_SLICE_BO, struct qaic_attach_slice) +#define DRM_IOCTL_QAIC_EXECUTE_BO DRM_IOW(DRM_COMMAND_BASE + DRM_QAIC_EXECUTE_BO, struct qaic_execute) +#define DRM_IOCTL_QAIC_PARTIAL_EXECUTE_BO DRM_IOW(DRM_COMMAND_BASE + DRM_QAIC_PARTIAL_EXECUTE_BO, struct qaic_execute) +#define DRM_IOCTL_QAIC_WAIT_BO DRM_IOW(DRM_COMMAND_BASE + DRM_QAIC_WAIT_BO, struct qaic_wait) +#define DRM_IOCTL_QAIC_PERF_STATS_BO DRM_IOWR(DRM_COMMAND_BASE + DRM_QAIC_PERF_STATS_BO, struct qaic_perf_stats) + +#if defined(__cplusplus) +} +#endif + +#endif /* QAIC_ACCEL_H_ */