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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/infiniband/hw/hns/hns_roce_cmd.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/infiniband/hw/hns/hns_roce_cmd.c')
-rw-r--r-- | drivers/infiniband/hw/hns/hns_roce_cmd.c | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hns/hns_roce_cmd.c b/drivers/infiniband/hw/hns/hns_roce_cmd.c new file mode 100644 index 000000000..864413607 --- /dev/null +++ b/drivers/infiniband/hw/hns/hns_roce_cmd.c @@ -0,0 +1,276 @@ +/* + * Copyright (c) 2016 Hisilicon Limited. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/dmapool.h> +#include "hns_roce_common.h" +#include "hns_roce_device.h" +#include "hns_roce_cmd.h" + +#define CMD_POLL_TOKEN 0xffff +#define CMD_MAX_NUM 32 + +static int hns_roce_cmd_mbox_post_hw(struct hns_roce_dev *hr_dev, + struct hns_roce_mbox_msg *mbox_msg) +{ + return hr_dev->hw->post_mbox(hr_dev, mbox_msg); +} + +/* this should be called with "poll_sem" */ +static int __hns_roce_cmd_mbox_poll(struct hns_roce_dev *hr_dev, + struct hns_roce_mbox_msg *mbox_msg) +{ + int ret; + + ret = hns_roce_cmd_mbox_post_hw(hr_dev, mbox_msg); + if (ret) { + dev_err_ratelimited(hr_dev->dev, + "failed to post mailbox 0x%x in poll mode, ret = %d.\n", + mbox_msg->cmd, ret); + return ret; + } + + return hr_dev->hw->poll_mbox_done(hr_dev); +} + +static int hns_roce_cmd_mbox_poll(struct hns_roce_dev *hr_dev, + struct hns_roce_mbox_msg *mbox_msg) +{ + int ret; + + down(&hr_dev->cmd.poll_sem); + ret = __hns_roce_cmd_mbox_poll(hr_dev, mbox_msg); + up(&hr_dev->cmd.poll_sem); + + return ret; +} + +void hns_roce_cmd_event(struct hns_roce_dev *hr_dev, u16 token, u8 status, + u64 out_param) +{ + struct hns_roce_cmd_context *context = + &hr_dev->cmd.context[token % hr_dev->cmd.max_cmds]; + + if (unlikely(token != context->token)) { + dev_err_ratelimited(hr_dev->dev, + "[cmd] invalid ae token 0x%x, context token is 0x%x.\n", + token, context->token); + return; + } + + context->result = (status == HNS_ROCE_CMD_SUCCESS) ? 0 : (-EIO); + context->out_param = out_param; + complete(&context->done); +} + +static int __hns_roce_cmd_mbox_wait(struct hns_roce_dev *hr_dev, + struct hns_roce_mbox_msg *mbox_msg) +{ + struct hns_roce_cmdq *cmd = &hr_dev->cmd; + struct hns_roce_cmd_context *context; + struct device *dev = hr_dev->dev; + int ret; + + spin_lock(&cmd->context_lock); + + do { + context = &cmd->context[cmd->free_head]; + cmd->free_head = context->next; + } while (context->busy); + + context->busy = 1; + context->token += cmd->max_cmds; + + spin_unlock(&cmd->context_lock); + + reinit_completion(&context->done); + + mbox_msg->token = context->token; + ret = hns_roce_cmd_mbox_post_hw(hr_dev, mbox_msg); + if (ret) { + dev_err_ratelimited(dev, + "failed to post mailbox 0x%x in event mode, ret = %d.\n", + mbox_msg->cmd, ret); + goto out; + } + + if (!wait_for_completion_timeout(&context->done, + msecs_to_jiffies(HNS_ROCE_CMD_TIMEOUT_MSECS))) { + dev_err_ratelimited(dev, "[cmd] token 0x%x mailbox 0x%x timeout.\n", + context->token, mbox_msg->cmd); + ret = -EBUSY; + goto out; + } + + ret = context->result; + if (ret) + dev_err_ratelimited(dev, "[cmd] token 0x%x mailbox 0x%x error %d.\n", + context->token, mbox_msg->cmd, ret); + +out: + context->busy = 0; + return ret; +} + +static int hns_roce_cmd_mbox_wait(struct hns_roce_dev *hr_dev, + struct hns_roce_mbox_msg *mbox_msg) +{ + int ret; + + down(&hr_dev->cmd.event_sem); + ret = __hns_roce_cmd_mbox_wait(hr_dev, mbox_msg); + up(&hr_dev->cmd.event_sem); + + return ret; +} + +int hns_roce_cmd_mbox(struct hns_roce_dev *hr_dev, u64 in_param, u64 out_param, + u8 cmd, unsigned long tag) +{ + struct hns_roce_mbox_msg mbox_msg = {}; + bool is_busy; + + if (hr_dev->hw->chk_mbox_avail) + if (!hr_dev->hw->chk_mbox_avail(hr_dev, &is_busy)) + return is_busy ? -EBUSY : 0; + + mbox_msg.in_param = in_param; + mbox_msg.out_param = out_param; + mbox_msg.cmd = cmd; + mbox_msg.tag = tag; + + if (hr_dev->cmd.use_events) { + mbox_msg.event_en = 1; + + return hns_roce_cmd_mbox_wait(hr_dev, &mbox_msg); + } else { + mbox_msg.event_en = 0; + mbox_msg.token = CMD_POLL_TOKEN; + + return hns_roce_cmd_mbox_poll(hr_dev, &mbox_msg); + } +} + +int hns_roce_cmd_init(struct hns_roce_dev *hr_dev) +{ + sema_init(&hr_dev->cmd.poll_sem, 1); + hr_dev->cmd.use_events = 0; + hr_dev->cmd.max_cmds = CMD_MAX_NUM; + hr_dev->cmd.pool = dma_pool_create("hns_roce_cmd", hr_dev->dev, + HNS_ROCE_MAILBOX_SIZE, + HNS_ROCE_MAILBOX_SIZE, 0); + if (!hr_dev->cmd.pool) + return -ENOMEM; + + return 0; +} + +void hns_roce_cmd_cleanup(struct hns_roce_dev *hr_dev) +{ + dma_pool_destroy(hr_dev->cmd.pool); +} + +int hns_roce_cmd_use_events(struct hns_roce_dev *hr_dev) +{ + struct hns_roce_cmdq *hr_cmd = &hr_dev->cmd; + int i; + + hr_cmd->context = + kcalloc(hr_cmd->max_cmds, sizeof(*hr_cmd->context), GFP_KERNEL); + if (!hr_cmd->context) { + hr_dev->cmd_mod = 0; + return -ENOMEM; + } + + for (i = 0; i < hr_cmd->max_cmds; ++i) { + hr_cmd->context[i].token = i; + hr_cmd->context[i].next = i + 1; + init_completion(&hr_cmd->context[i].done); + } + hr_cmd->context[hr_cmd->max_cmds - 1].next = 0; + hr_cmd->free_head = 0; + + sema_init(&hr_cmd->event_sem, hr_cmd->max_cmds); + spin_lock_init(&hr_cmd->context_lock); + + hr_cmd->use_events = 1; + + return 0; +} + +void hns_roce_cmd_use_polling(struct hns_roce_dev *hr_dev) +{ + struct hns_roce_cmdq *hr_cmd = &hr_dev->cmd; + + kfree(hr_cmd->context); + hr_cmd->use_events = 0; +} + +struct hns_roce_cmd_mailbox * +hns_roce_alloc_cmd_mailbox(struct hns_roce_dev *hr_dev) +{ + struct hns_roce_cmd_mailbox *mailbox; + + mailbox = kmalloc(sizeof(*mailbox), GFP_KERNEL); + if (!mailbox) + return ERR_PTR(-ENOMEM); + + mailbox->buf = + dma_pool_alloc(hr_dev->cmd.pool, GFP_KERNEL, &mailbox->dma); + if (!mailbox->buf) { + kfree(mailbox); + return ERR_PTR(-ENOMEM); + } + + return mailbox; +} + +void hns_roce_free_cmd_mailbox(struct hns_roce_dev *hr_dev, + struct hns_roce_cmd_mailbox *mailbox) +{ + if (!mailbox) + return; + + dma_pool_free(hr_dev->cmd.pool, mailbox->buf, mailbox->dma); + kfree(mailbox); +} + +int hns_roce_create_hw_ctx(struct hns_roce_dev *dev, + struct hns_roce_cmd_mailbox *mailbox, + u8 cmd, unsigned long idx) +{ + return hns_roce_cmd_mbox(dev, mailbox->dma, 0, cmd, idx); +} + +int hns_roce_destroy_hw_ctx(struct hns_roce_dev *dev, u8 cmd, unsigned long idx) +{ + return hns_roce_cmd_mbox(dev, 0, 0, cmd, idx); +} |