diff options
Diffstat (limited to 'drivers/accel/ivpu/ivpu_ipc.c')
| -rw-r--r-- | drivers/accel/ivpu/ivpu_ipc.c | 593 |
1 files changed, 593 insertions, 0 deletions
diff --git a/drivers/accel/ivpu/ivpu_ipc.c b/drivers/accel/ivpu/ivpu_ipc.c new file mode 100644 index 000000000000..1f13bf95b2b3 --- /dev/null +++ b/drivers/accel/ivpu/ivpu_ipc.c @@ -0,0 +1,593 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020-2024 Intel Corporation + */ + +#include <linux/genalloc.h> +#include <linux/highmem.h> +#include <linux/pm_runtime.h> +#include <linux/wait.h> + +#include "ivpu_drv.h" +#include "ivpu_gem.h" +#include "ivpu_hw.h" +#include "ivpu_hw_reg_io.h" +#include "ivpu_ipc.h" +#include "ivpu_jsm_msg.h" +#include "ivpu_pm.h" +#include "ivpu_trace.h" + +#define IPC_MAX_RX_MSG 128 + +struct ivpu_ipc_tx_buf { + struct ivpu_ipc_hdr ipc; + struct vpu_jsm_msg jsm; +}; + +static void ivpu_ipc_msg_dump(struct ivpu_device *vdev, char *c, + struct ivpu_ipc_hdr *ipc_hdr, u32 vpu_addr) +{ + ivpu_dbg(vdev, IPC, + "%s: vpu:0x%x (data_addr:0x%08x, data_size:0x%x, channel:0x%x, src_node:0x%x, dst_node:0x%x, status:0x%x)", + c, vpu_addr, ipc_hdr->data_addr, ipc_hdr->data_size, ipc_hdr->channel, + ipc_hdr->src_node, ipc_hdr->dst_node, ipc_hdr->status); +} + +static void ivpu_jsm_msg_dump(struct ivpu_device *vdev, char *c, + struct vpu_jsm_msg *jsm_msg, u32 vpu_addr) +{ + u32 *payload = (u32 *)&jsm_msg->payload; + + ivpu_dbg(vdev, JSM, + "%s: vpu:0x%08x (type:%s, status:0x%x, id: 0x%x, result: 0x%x, payload:0x%x 0x%x 0x%x 0x%x 0x%x)\n", + c, vpu_addr, ivpu_jsm_msg_type_to_str(jsm_msg->type), + jsm_msg->status, jsm_msg->request_id, jsm_msg->result, + payload[0], payload[1], payload[2], payload[3], payload[4]); +} + +static void +ivpu_ipc_rx_mark_free(struct ivpu_device *vdev, struct ivpu_ipc_hdr *ipc_hdr, + struct vpu_jsm_msg *jsm_msg) +{ + ipc_hdr->status = IVPU_IPC_HDR_FREE; + if (jsm_msg) + jsm_msg->status = VPU_JSM_MSG_FREE; + wmb(); /* Flush WC buffers for message statuses */ +} + +static void ivpu_ipc_mem_fini(struct ivpu_device *vdev) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + + ivpu_bo_free(ipc->mem_rx); + ivpu_bo_free(ipc->mem_tx); +} + +static int +ivpu_ipc_tx_prepare(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, + struct vpu_jsm_msg *req) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + struct ivpu_ipc_tx_buf *tx_buf; + u32 tx_buf_vpu_addr; + u32 jsm_vpu_addr; + + tx_buf_vpu_addr = gen_pool_alloc(ipc->mm_tx, sizeof(*tx_buf)); + if (!tx_buf_vpu_addr) { + ivpu_err_ratelimited(vdev, "Failed to reserve IPC buffer, size %ld\n", + sizeof(*tx_buf)); + return -ENOMEM; + } + + tx_buf = ivpu_to_cpu_addr(ipc->mem_tx, tx_buf_vpu_addr); + if (drm_WARN_ON(&vdev->drm, !tx_buf)) { + gen_pool_free(ipc->mm_tx, tx_buf_vpu_addr, sizeof(*tx_buf)); + return -EIO; + } + + jsm_vpu_addr = tx_buf_vpu_addr + offsetof(struct ivpu_ipc_tx_buf, jsm); + + if (tx_buf->ipc.status != IVPU_IPC_HDR_FREE) + ivpu_warn_ratelimited(vdev, "IPC message vpu:0x%x not released by firmware\n", + tx_buf_vpu_addr); + + if (tx_buf->jsm.status != VPU_JSM_MSG_FREE) + ivpu_warn_ratelimited(vdev, "JSM message vpu:0x%x not released by firmware\n", + jsm_vpu_addr); + + memset(tx_buf, 0, sizeof(*tx_buf)); + tx_buf->ipc.data_addr = jsm_vpu_addr; + /* TODO: Set data_size to actual JSM message size, not union of all messages */ + tx_buf->ipc.data_size = sizeof(*req); + tx_buf->ipc.channel = cons->channel; + tx_buf->ipc.src_node = 0; + tx_buf->ipc.dst_node = 1; + tx_buf->ipc.status = IVPU_IPC_HDR_ALLOCATED; + tx_buf->jsm.type = req->type; + tx_buf->jsm.status = VPU_JSM_MSG_ALLOCATED; + tx_buf->jsm.payload = req->payload; + + req->request_id = atomic_inc_return(&ipc->request_id); + tx_buf->jsm.request_id = req->request_id; + cons->request_id = req->request_id; + wmb(); /* Flush WC buffers for IPC, JSM msgs */ + + cons->tx_vpu_addr = tx_buf_vpu_addr; + + ivpu_jsm_msg_dump(vdev, "TX", &tx_buf->jsm, jsm_vpu_addr); + ivpu_ipc_msg_dump(vdev, "TX", &tx_buf->ipc, tx_buf_vpu_addr); + + return 0; +} + +static void ivpu_ipc_tx_release(struct ivpu_device *vdev, u32 vpu_addr) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + + if (vpu_addr) + gen_pool_free(ipc->mm_tx, vpu_addr, sizeof(struct ivpu_ipc_tx_buf)); +} + +static void ivpu_ipc_tx(struct ivpu_device *vdev, u32 vpu_addr) +{ + ivpu_hw_ipc_tx_set(vdev, vpu_addr); +} + +static void +ivpu_ipc_rx_msg_add(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, + struct ivpu_ipc_hdr *ipc_hdr, struct vpu_jsm_msg *jsm_msg) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + struct ivpu_ipc_rx_msg *rx_msg; + + lockdep_assert_held(&ipc->cons_lock); + + rx_msg = kzalloc(sizeof(*rx_msg), GFP_ATOMIC); + if (!rx_msg) { + ivpu_ipc_rx_mark_free(vdev, ipc_hdr, jsm_msg); + return; + } + + atomic_inc(&ipc->rx_msg_count); + + rx_msg->ipc_hdr = ipc_hdr; + rx_msg->jsm_msg = jsm_msg; + rx_msg->callback = cons->rx_callback; + + if (rx_msg->callback) { + list_add_tail(&rx_msg->link, &ipc->cb_msg_list); + } else { + spin_lock(&cons->rx_lock); + list_add_tail(&rx_msg->link, &cons->rx_msg_list); + spin_unlock(&cons->rx_lock); + wake_up(&cons->rx_msg_wq); + } +} + +static void +ivpu_ipc_rx_msg_del(struct ivpu_device *vdev, struct ivpu_ipc_rx_msg *rx_msg) +{ + list_del(&rx_msg->link); + ivpu_ipc_rx_mark_free(vdev, rx_msg->ipc_hdr, rx_msg->jsm_msg); + atomic_dec(&vdev->ipc->rx_msg_count); + kfree(rx_msg); +} + +void ivpu_ipc_consumer_add(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, + u32 channel, ivpu_ipc_rx_callback_t rx_callback) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + + INIT_LIST_HEAD(&cons->link); + cons->channel = channel; + cons->tx_vpu_addr = 0; + cons->request_id = 0; + cons->aborted = false; + cons->rx_callback = rx_callback; + spin_lock_init(&cons->rx_lock); + INIT_LIST_HEAD(&cons->rx_msg_list); + init_waitqueue_head(&cons->rx_msg_wq); + + spin_lock_irq(&ipc->cons_lock); + list_add_tail(&cons->link, &ipc->cons_list); + spin_unlock_irq(&ipc->cons_lock); +} + +void ivpu_ipc_consumer_del(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + struct ivpu_ipc_rx_msg *rx_msg, *r; + + spin_lock_irq(&ipc->cons_lock); + list_del(&cons->link); + spin_unlock_irq(&ipc->cons_lock); + + spin_lock_irq(&cons->rx_lock); + list_for_each_entry_safe(rx_msg, r, &cons->rx_msg_list, link) + ivpu_ipc_rx_msg_del(vdev, rx_msg); + spin_unlock_irq(&cons->rx_lock); + + ivpu_ipc_tx_release(vdev, cons->tx_vpu_addr); +} + +int ivpu_ipc_send(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, struct vpu_jsm_msg *req) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + int ret; + + mutex_lock(&ipc->lock); + + if (!ipc->on) { + ret = -EAGAIN; + goto unlock; + } + + ret = ivpu_ipc_tx_prepare(vdev, cons, req); + if (ret) + goto unlock; + + ivpu_ipc_tx(vdev, cons->tx_vpu_addr); + trace_jsm("[tx]", req); + +unlock: + mutex_unlock(&ipc->lock); + return ret; +} + +static bool ivpu_ipc_rx_need_wakeup(struct ivpu_ipc_consumer *cons) +{ + bool ret; + + spin_lock_irq(&cons->rx_lock); + ret = !list_empty(&cons->rx_msg_list) || cons->aborted; + spin_unlock_irq(&cons->rx_lock); + + return ret; +} + +int ivpu_ipc_receive(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, + struct ivpu_ipc_hdr *ipc_buf, + struct vpu_jsm_msg *jsm_msg, unsigned long timeout_ms) +{ + struct ivpu_ipc_rx_msg *rx_msg; + int wait_ret, ret = 0; + + if (drm_WARN_ONCE(&vdev->drm, cons->rx_callback, "Consumer works only in async mode\n")) + return -EINVAL; + + wait_ret = wait_event_timeout(cons->rx_msg_wq, + ivpu_ipc_rx_need_wakeup(cons), + msecs_to_jiffies(timeout_ms)); + + if (wait_ret == 0) + return -ETIMEDOUT; + + spin_lock_irq(&cons->rx_lock); + if (cons->aborted) { + spin_unlock_irq(&cons->rx_lock); + return -ECANCELED; + } + rx_msg = list_first_entry_or_null(&cons->rx_msg_list, struct ivpu_ipc_rx_msg, link); + if (!rx_msg) { + spin_unlock_irq(&cons->rx_lock); + return -EAGAIN; + } + + if (ipc_buf) + memcpy(ipc_buf, rx_msg->ipc_hdr, sizeof(*ipc_buf)); + if (rx_msg->jsm_msg) { + u32 size = min_t(int, rx_msg->ipc_hdr->data_size, sizeof(*jsm_msg)); + + if (rx_msg->jsm_msg->result != VPU_JSM_STATUS_SUCCESS) { + ivpu_err(vdev, "IPC resp result error: %d\n", rx_msg->jsm_msg->result); + ret = -EBADMSG; + } + + if (jsm_msg) + memcpy(jsm_msg, rx_msg->jsm_msg, size); + trace_jsm("[rx]", rx_msg->jsm_msg); + } + + ivpu_ipc_rx_msg_del(vdev, rx_msg); + spin_unlock_irq(&cons->rx_lock); + return ret; +} + +int +ivpu_ipc_send_receive_internal(struct ivpu_device *vdev, struct vpu_jsm_msg *req, + enum vpu_ipc_msg_type expected_resp_type, + struct vpu_jsm_msg *resp, u32 channel, unsigned long timeout_ms) +{ + struct ivpu_ipc_consumer cons; + int ret; + + drm_WARN_ON(&vdev->drm, pm_runtime_status_suspended(vdev->drm.dev) && + pm_runtime_enabled(vdev->drm.dev)); + + ivpu_ipc_consumer_add(vdev, &cons, channel, NULL); + + ret = ivpu_ipc_send(vdev, &cons, req); + if (ret) { + ivpu_warn_ratelimited(vdev, "IPC send failed: %d\n", ret); + goto consumer_del; + } + + ret = ivpu_ipc_receive(vdev, &cons, NULL, resp, timeout_ms); + if (ret) { + ivpu_warn_ratelimited(vdev, "IPC receive failed: type %s, ret %d\n", + ivpu_jsm_msg_type_to_str(req->type), ret); + goto consumer_del; + } + + if (resp->type != expected_resp_type) { + ivpu_warn_ratelimited(vdev, "Invalid JSM response type: 0x%x\n", resp->type); + ret = -EBADE; + } + +consumer_del: + ivpu_ipc_consumer_del(vdev, &cons); + return ret; +} + +int ivpu_ipc_send_receive(struct ivpu_device *vdev, struct vpu_jsm_msg *req, + enum vpu_ipc_msg_type expected_resp, struct vpu_jsm_msg *resp, + u32 channel, unsigned long timeout_ms) +{ + struct vpu_jsm_msg hb_req = { .type = VPU_JSM_MSG_QUERY_ENGINE_HB }; + struct vpu_jsm_msg hb_resp; + int ret, hb_ret; + + ret = ivpu_rpm_get(vdev); + if (ret < 0) + return ret; + + ret = ivpu_ipc_send_receive_internal(vdev, req, expected_resp, resp, channel, timeout_ms); + if (ret != -ETIMEDOUT) + goto rpm_put; + + hb_ret = ivpu_ipc_send_receive_internal(vdev, &hb_req, VPU_JSM_MSG_QUERY_ENGINE_HB_DONE, + &hb_resp, VPU_IPC_CHAN_ASYNC_CMD, + vdev->timeout.jsm); + if (hb_ret == -ETIMEDOUT) + ivpu_pm_trigger_recovery(vdev, "IPC timeout"); + +rpm_put: + ivpu_rpm_put(vdev); + return ret; +} + +int ivpu_ipc_send_and_wait(struct ivpu_device *vdev, struct vpu_jsm_msg *req, + u32 channel, unsigned long timeout_ms) +{ + struct ivpu_ipc_consumer cons; + int ret; + + ret = ivpu_rpm_get(vdev); + if (ret < 0) + return ret; + + ivpu_ipc_consumer_add(vdev, &cons, channel, NULL); + + ret = ivpu_ipc_send(vdev, &cons, req); + if (ret) { + ivpu_warn_ratelimited(vdev, "IPC send failed: %d\n", ret); + goto consumer_del; + } + + msleep(timeout_ms); + +consumer_del: + ivpu_ipc_consumer_del(vdev, &cons); + ivpu_rpm_put(vdev); + return ret; +} + +static bool +ivpu_ipc_match_consumer(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, + struct ivpu_ipc_hdr *ipc_hdr, struct vpu_jsm_msg *jsm_msg) +{ + if (cons->channel != ipc_hdr->channel) + return false; + + if (!jsm_msg || jsm_msg->request_id == cons->request_id) + return true; + + return false; +} + +void ivpu_ipc_irq_handler(struct ivpu_device *vdev) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + struct ivpu_ipc_consumer *cons; + struct ivpu_ipc_hdr *ipc_hdr; + struct vpu_jsm_msg *jsm_msg; + unsigned long flags; + bool dispatched; + u32 vpu_addr; + + /* + * Driver needs to purge all messages from IPC FIFO to clear IPC interrupt. + * Without purge IPC FIFO to 0 next IPC interrupts won't be generated. + */ + while (ivpu_hw_ipc_rx_count_get(vdev)) { + vpu_addr = ivpu_hw_ipc_rx_addr_get(vdev); + if (vpu_addr == REG_IO_ERROR) { + ivpu_err_ratelimited(vdev, "Failed to read IPC rx addr register\n"); + return; + } + + ipc_hdr = ivpu_to_cpu_addr(ipc->mem_rx, vpu_addr); + if (!ipc_hdr) { + ivpu_warn_ratelimited(vdev, "IPC msg 0x%x out of range\n", vpu_addr); + continue; + } + ivpu_ipc_msg_dump(vdev, "RX", ipc_hdr, vpu_addr); + + jsm_msg = NULL; + if (ipc_hdr->channel != IVPU_IPC_CHAN_BOOT_MSG) { + jsm_msg = ivpu_to_cpu_addr(ipc->mem_rx, ipc_hdr->data_addr); + if (!jsm_msg) { + ivpu_warn_ratelimited(vdev, "JSM msg 0x%x out of range\n", + ipc_hdr->data_addr); + ivpu_ipc_rx_mark_free(vdev, ipc_hdr, NULL); + continue; + } + ivpu_jsm_msg_dump(vdev, "RX", jsm_msg, ipc_hdr->data_addr); + } + + if (atomic_read(&ipc->rx_msg_count) > IPC_MAX_RX_MSG) { + ivpu_warn_ratelimited(vdev, "IPC RX msg dropped, msg count %d\n", + IPC_MAX_RX_MSG); + ivpu_ipc_rx_mark_free(vdev, ipc_hdr, jsm_msg); + continue; + } + + dispatched = false; + spin_lock_irqsave(&ipc->cons_lock, flags); + list_for_each_entry(cons, &ipc->cons_list, link) { + if (ivpu_ipc_match_consumer(vdev, cons, ipc_hdr, jsm_msg)) { + ivpu_ipc_rx_msg_add(vdev, cons, ipc_hdr, jsm_msg); + dispatched = true; + break; + } + } + spin_unlock_irqrestore(&ipc->cons_lock, flags); + + if (!dispatched) { + ivpu_dbg(vdev, IPC, "IPC RX msg 0x%x dropped (no consumer)\n", vpu_addr); + ivpu_ipc_rx_mark_free(vdev, ipc_hdr, jsm_msg); + } + } + + queue_work(system_percpu_wq, &vdev->irq_ipc_work); +} + +void ivpu_ipc_irq_work_fn(struct work_struct *work) +{ + struct ivpu_device *vdev = container_of(work, struct ivpu_device, irq_ipc_work); + struct ivpu_ipc_info *ipc = vdev->ipc; + struct ivpu_ipc_rx_msg *rx_msg, *r; + struct list_head cb_msg_list; + + INIT_LIST_HEAD(&cb_msg_list); + + spin_lock_irq(&ipc->cons_lock); + list_splice_tail_init(&ipc->cb_msg_list, &cb_msg_list); + spin_unlock_irq(&ipc->cons_lock); + + list_for_each_entry_safe(rx_msg, r, &cb_msg_list, link) { + rx_msg->callback(vdev, rx_msg->ipc_hdr, rx_msg->jsm_msg); + ivpu_ipc_rx_msg_del(vdev, rx_msg); + } +} + +int ivpu_ipc_init(struct ivpu_device *vdev) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + int ret; + + ipc->mem_tx = ivpu_bo_create_global(vdev, SZ_16K, DRM_IVPU_BO_WC | DRM_IVPU_BO_MAPPABLE); + if (!ipc->mem_tx) { + ivpu_err(vdev, "Failed to allocate mem_tx\n"); + return -ENOMEM; + } + + ipc->mem_rx = ivpu_bo_create_global(vdev, SZ_16K, DRM_IVPU_BO_WC | DRM_IVPU_BO_MAPPABLE); + if (!ipc->mem_rx) { + ivpu_err(vdev, "Failed to allocate mem_rx\n"); + ret = -ENOMEM; + goto err_free_tx; + } + + ipc->mm_tx = devm_gen_pool_create(vdev->drm.dev, __ffs(IVPU_IPC_ALIGNMENT), + -1, "TX_IPC_JSM"); + if (IS_ERR(ipc->mm_tx)) { + ret = PTR_ERR(ipc->mm_tx); + ivpu_err(vdev, "Failed to create gen pool, %pe\n", ipc->mm_tx); + goto err_free_rx; + } + + ret = gen_pool_add(ipc->mm_tx, ipc->mem_tx->vpu_addr, ivpu_bo_size(ipc->mem_tx), -1); + if (ret) { + ivpu_err(vdev, "gen_pool_add failed, ret %d\n", ret); + goto err_free_rx; + } + + spin_lock_init(&ipc->cons_lock); + INIT_LIST_HEAD(&ipc->cons_list); + INIT_LIST_HEAD(&ipc->cb_msg_list); + ret = drmm_mutex_init(&vdev->drm, &ipc->lock); + if (ret) { + ivpu_err(vdev, "Failed to initialize ipc->lock, ret %d\n", ret); + goto err_free_rx; + } + ivpu_ipc_reset(vdev); + return 0; + +err_free_rx: + ivpu_bo_free(ipc->mem_rx); +err_free_tx: + ivpu_bo_free(ipc->mem_tx); + return ret; +} + +void ivpu_ipc_fini(struct ivpu_device *vdev) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + + drm_WARN_ON(&vdev->drm, !list_empty(&ipc->cons_list)); + drm_WARN_ON(&vdev->drm, !list_empty(&ipc->cb_msg_list)); + drm_WARN_ON(&vdev->drm, atomic_read(&ipc->rx_msg_count) > 0); + + ivpu_ipc_mem_fini(vdev); +} + +void ivpu_ipc_enable(struct ivpu_device *vdev) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + + mutex_lock(&ipc->lock); + ipc->on = true; + mutex_unlock(&ipc->lock); +} + +void ivpu_ipc_disable(struct ivpu_device *vdev) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + struct ivpu_ipc_consumer *cons, *c; + struct ivpu_ipc_rx_msg *rx_msg, *r; + + drm_WARN_ON(&vdev->drm, !list_empty(&ipc->cb_msg_list)); + + mutex_lock(&ipc->lock); + ipc->on = false; + mutex_unlock(&ipc->lock); + + spin_lock_irq(&ipc->cons_lock); + list_for_each_entry_safe(cons, c, &ipc->cons_list, link) { + spin_lock(&cons->rx_lock); + if (!cons->rx_callback) + cons->aborted = true; + list_for_each_entry_safe(rx_msg, r, &cons->rx_msg_list, link) + ivpu_ipc_rx_msg_del(vdev, rx_msg); + spin_unlock(&cons->rx_lock); + wake_up(&cons->rx_msg_wq); + } + spin_unlock_irq(&ipc->cons_lock); + + drm_WARN_ON(&vdev->drm, atomic_read(&ipc->rx_msg_count) > 0); +} + +void ivpu_ipc_reset(struct ivpu_device *vdev) +{ + struct ivpu_ipc_info *ipc = vdev->ipc; + + mutex_lock(&ipc->lock); + drm_WARN_ON(&vdev->drm, ipc->on); + + memset(ivpu_bo_vaddr(ipc->mem_tx), 0, ivpu_bo_size(ipc->mem_tx)); + memset(ivpu_bo_vaddr(ipc->mem_rx), 0, ivpu_bo_size(ipc->mem_rx)); + wmb(); /* Flush WC buffers for TX and RX rings */ + + mutex_unlock(&ipc->lock); +} |