diff options
Diffstat (limited to 'drivers/accel')
| -rw-r--r-- | drivers/accel/qaic/Makefile | 3 | ||||
| -rw-r--r-- | drivers/accel/qaic/qaic_drv.c | 10 | ||||
| -rw-r--r-- | drivers/accel/qaic/sahara.c | 449 | ||||
| -rw-r--r-- | drivers/accel/qaic/sahara.h | 10 |
4 files changed, 471 insertions, 1 deletions
diff --git a/drivers/accel/qaic/Makefile b/drivers/accel/qaic/Makefile index 2cadcc1baa0e..35e883515629 100644 --- a/drivers/accel/qaic/Makefile +++ b/drivers/accel/qaic/Makefile @@ -10,6 +10,7 @@ qaic-y := \ qaic_control.o \ qaic_data.o \ qaic_drv.o \ - qaic_timesync.o + qaic_timesync.o \ + sahara.o qaic-$(CONFIG_DEBUG_FS) += qaic_debugfs.o diff --git a/drivers/accel/qaic/qaic_drv.c b/drivers/accel/qaic/qaic_drv.c index f072edb74f22..580b29ed1902 100644 --- a/drivers/accel/qaic/qaic_drv.c +++ b/drivers/accel/qaic/qaic_drv.c @@ -30,6 +30,7 @@ #include "qaic.h" #include "qaic_debugfs.h" #include "qaic_timesync.h" +#include "sahara.h" MODULE_IMPORT_NS(DMA_BUF); @@ -644,6 +645,12 @@ static int __init qaic_init(void) goto free_pci; } + ret = sahara_register(); + if (ret) { + pr_debug("qaic: sahara_register failed %d\n", ret); + goto free_mhi; + } + ret = qaic_timesync_init(); if (ret) pr_debug("qaic: qaic_timesync_init failed %d\n", ret); @@ -654,6 +661,8 @@ static int __init qaic_init(void) return 0; +free_mhi: + mhi_driver_unregister(&qaic_mhi_driver); free_pci: pci_unregister_driver(&qaic_pci_driver); return ret; @@ -679,6 +688,7 @@ static void __exit qaic_exit(void) link_up = true; qaic_bootlog_unregister(); qaic_timesync_deinit(); + sahara_unregister(); mhi_driver_unregister(&qaic_mhi_driver); pci_unregister_driver(&qaic_pci_driver); } diff --git a/drivers/accel/qaic/sahara.c b/drivers/accel/qaic/sahara.c new file mode 100644 index 000000000000..bf94bbab6be5 --- /dev/null +++ b/drivers/accel/qaic/sahara.c @@ -0,0 +1,449 @@ +// SPDX-License-Identifier: GPL-2.0-only + +/* Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved. */ + +#include <linux/firmware.h> +#include <linux/limits.h> +#include <linux/mhi.h> +#include <linux/minmax.h> +#include <linux/mod_devicetable.h> +#include <linux/overflow.h> +#include <linux/types.h> +#include <linux/workqueue.h> + +#include "sahara.h" + +#define SAHARA_HELLO_CMD 0x1 /* Min protocol version 1.0 */ +#define SAHARA_HELLO_RESP_CMD 0x2 /* Min protocol version 1.0 */ +#define SAHARA_READ_DATA_CMD 0x3 /* Min protocol version 1.0 */ +#define SAHARA_END_OF_IMAGE_CMD 0x4 /* Min protocol version 1.0 */ +#define SAHARA_DONE_CMD 0x5 /* Min protocol version 1.0 */ +#define SAHARA_DONE_RESP_CMD 0x6 /* Min protocol version 1.0 */ +#define SAHARA_RESET_CMD 0x7 /* Min protocol version 1.0 */ +#define SAHARA_RESET_RESP_CMD 0x8 /* Min protocol version 1.0 */ +#define SAHARA_MEM_DEBUG_CMD 0x9 /* Min protocol version 2.0 */ +#define SAHARA_MEM_READ_CMD 0xa /* Min protocol version 2.0 */ +#define SAHARA_CMD_READY_CMD 0xb /* Min protocol version 2.1 */ +#define SAHARA_SWITCH_MODE_CMD 0xc /* Min protocol version 2.1 */ +#define SAHARA_EXECUTE_CMD 0xd /* Min protocol version 2.1 */ +#define SAHARA_EXECUTE_RESP_CMD 0xe /* Min protocol version 2.1 */ +#define SAHARA_EXECUTE_DATA_CMD 0xf /* Min protocol version 2.1 */ +#define SAHARA_MEM_DEBUG64_CMD 0x10 /* Min protocol version 2.5 */ +#define SAHARA_MEM_READ64_CMD 0x11 /* Min protocol version 2.5 */ +#define SAHARA_READ_DATA64_CMD 0x12 /* Min protocol version 2.8 */ +#define SAHARA_RESET_STATE_CMD 0x13 /* Min protocol version 2.9 */ +#define SAHARA_WRITE_DATA_CMD 0x14 /* Min protocol version 3.0 */ + +#define SAHARA_PACKET_MAX_SIZE 0xffffU /* MHI_MAX_MTU */ +#define SAHARA_TRANSFER_MAX_SIZE 0x80000 +#define SAHARA_NUM_TX_BUF DIV_ROUND_UP(SAHARA_TRANSFER_MAX_SIZE,\ + SAHARA_PACKET_MAX_SIZE) +#define SAHARA_IMAGE_ID_NONE U32_MAX + +#define SAHARA_VERSION 2 +#define SAHARA_SUCCESS 0 + +#define SAHARA_MODE_IMAGE_TX_PENDING 0x0 +#define SAHARA_MODE_IMAGE_TX_COMPLETE 0x1 +#define SAHARA_MODE_MEMORY_DEBUG 0x2 +#define SAHARA_MODE_COMMAND 0x3 + +#define SAHARA_HELLO_LENGTH 0x30 +#define SAHARA_READ_DATA_LENGTH 0x14 +#define SAHARA_END_OF_IMAGE_LENGTH 0x10 +#define SAHARA_DONE_LENGTH 0x8 +#define SAHARA_RESET_LENGTH 0x8 + +struct sahara_packet { + __le32 cmd; + __le32 length; + + union { + struct { + __le32 version; + __le32 version_compat; + __le32 max_length; + __le32 mode; + } hello; + struct { + __le32 version; + __le32 version_compat; + __le32 status; + __le32 mode; + } hello_resp; + struct { + __le32 image; + __le32 offset; + __le32 length; + } read_data; + struct { + __le32 image; + __le32 status; + } end_of_image; + }; +}; + +struct sahara_context { + struct sahara_packet *tx[SAHARA_NUM_TX_BUF]; + struct sahara_packet *rx; + struct work_struct work; + struct mhi_device *mhi_dev; + const char **image_table; + u32 table_size; + u32 active_image_id; + const struct firmware *firmware; +}; + +static const char *aic100_image_table[] = { + [1] = "qcom/aic100/fw1.bin", + [2] = "qcom/aic100/fw2.bin", + [4] = "qcom/aic100/fw4.bin", + [5] = "qcom/aic100/fw5.bin", + [6] = "qcom/aic100/fw6.bin", + [8] = "qcom/aic100/fw8.bin", + [9] = "qcom/aic100/fw9.bin", + [10] = "qcom/aic100/fw10.bin", +}; + +static int sahara_find_image(struct sahara_context *context, u32 image_id) +{ + int ret; + + if (image_id == context->active_image_id) + return 0; + + if (context->active_image_id != SAHARA_IMAGE_ID_NONE) { + dev_err(&context->mhi_dev->dev, "image id %d is not valid as %d is active\n", + image_id, context->active_image_id); + return -EINVAL; + } + + if (image_id >= context->table_size || !context->image_table[image_id]) { + dev_err(&context->mhi_dev->dev, "request for unknown image: %d\n", image_id); + return -EINVAL; + } + + /* + * This image might be optional. The device may continue without it. + * Only the device knows. Suppress error messages that could suggest an + * a problem when we were actually able to continue. + */ + ret = firmware_request_nowarn(&context->firmware, + context->image_table[image_id], + &context->mhi_dev->dev); + if (ret) { + dev_dbg(&context->mhi_dev->dev, "request for image id %d / file %s failed %d\n", + image_id, context->image_table[image_id], ret); + return ret; + } + + context->active_image_id = image_id; + + return 0; +} + +static void sahara_release_image(struct sahara_context *context) +{ + if (context->active_image_id != SAHARA_IMAGE_ID_NONE) + release_firmware(context->firmware); + context->active_image_id = SAHARA_IMAGE_ID_NONE; +} + +static void sahara_send_reset(struct sahara_context *context) +{ + int ret; + + context->tx[0]->cmd = cpu_to_le32(SAHARA_RESET_CMD); + context->tx[0]->length = cpu_to_le32(SAHARA_RESET_LENGTH); + + ret = mhi_queue_buf(context->mhi_dev, DMA_TO_DEVICE, context->tx[0], + SAHARA_RESET_LENGTH, MHI_EOT); + if (ret) + dev_err(&context->mhi_dev->dev, "Unable to send reset response %d\n", ret); +} + +static void sahara_hello(struct sahara_context *context) +{ + int ret; + + dev_dbg(&context->mhi_dev->dev, + "HELLO cmd received. length:%d version:%d version_compat:%d max_length:%d mode:%d\n", + le32_to_cpu(context->rx->length), + le32_to_cpu(context->rx->hello.version), + le32_to_cpu(context->rx->hello.version_compat), + le32_to_cpu(context->rx->hello.max_length), + le32_to_cpu(context->rx->hello.mode)); + + if (le32_to_cpu(context->rx->length) != SAHARA_HELLO_LENGTH) { + dev_err(&context->mhi_dev->dev, "Malformed hello packet - length %d\n", + le32_to_cpu(context->rx->length)); + return; + } + if (le32_to_cpu(context->rx->hello.version) != SAHARA_VERSION) { + dev_err(&context->mhi_dev->dev, "Unsupported hello packet - version %d\n", + le32_to_cpu(context->rx->hello.version)); + return; + } + + if (le32_to_cpu(context->rx->hello.mode) != SAHARA_MODE_IMAGE_TX_PENDING && + le32_to_cpu(context->rx->hello.mode) != SAHARA_MODE_IMAGE_TX_COMPLETE) { + dev_err(&context->mhi_dev->dev, "Unsupported hello packet - mode %d\n", + le32_to_cpu(context->rx->hello.mode)); + return; + } + + context->tx[0]->cmd = cpu_to_le32(SAHARA_HELLO_RESP_CMD); + context->tx[0]->length = cpu_to_le32(SAHARA_HELLO_LENGTH); + context->tx[0]->hello_resp.version = cpu_to_le32(SAHARA_VERSION); + context->tx[0]->hello_resp.version_compat = cpu_to_le32(SAHARA_VERSION); + context->tx[0]->hello_resp.status = cpu_to_le32(SAHARA_SUCCESS); + context->tx[0]->hello_resp.mode = context->rx->hello_resp.mode; + + ret = mhi_queue_buf(context->mhi_dev, DMA_TO_DEVICE, context->tx[0], + SAHARA_HELLO_LENGTH, MHI_EOT); + if (ret) + dev_err(&context->mhi_dev->dev, "Unable to send hello response %d\n", ret); +} + +static void sahara_read_data(struct sahara_context *context) +{ + u32 image_id, data_offset, data_len, pkt_data_len; + int ret; + int i; + + dev_dbg(&context->mhi_dev->dev, + "READ_DATA cmd received. length:%d image:%d offset:%d data_length:%d\n", + le32_to_cpu(context->rx->length), + le32_to_cpu(context->rx->read_data.image), + le32_to_cpu(context->rx->read_data.offset), + le32_to_cpu(context->rx->read_data.length)); + + if (le32_to_cpu(context->rx->length) != SAHARA_READ_DATA_LENGTH) { + dev_err(&context->mhi_dev->dev, "Malformed read_data packet - length %d\n", + le32_to_cpu(context->rx->length)); + return; + } + + image_id = le32_to_cpu(context->rx->read_data.image); + data_offset = le32_to_cpu(context->rx->read_data.offset); + data_len = le32_to_cpu(context->rx->read_data.length); + + ret = sahara_find_image(context, image_id); + if (ret) { + sahara_send_reset(context); + return; + } + + /* + * Image is released when the device is done with it via + * SAHARA_END_OF_IMAGE_CMD. sahara_send_reset() will either cause the + * device to retry the operation with a modification, or decide to be + * done with the image and trigger SAHARA_END_OF_IMAGE_CMD. + * release_image() is called from SAHARA_END_OF_IMAGE_CMD. processing + * and is not needed here on error. + */ + + if (data_len > SAHARA_TRANSFER_MAX_SIZE) { + dev_err(&context->mhi_dev->dev, "Malformed read_data packet - data len %d exceeds max xfer size %d\n", + data_len, SAHARA_TRANSFER_MAX_SIZE); + sahara_send_reset(context); + return; + } + + if (data_offset >= context->firmware->size) { + dev_err(&context->mhi_dev->dev, "Malformed read_data packet - data offset %d exceeds file size %zu\n", + data_offset, context->firmware->size); + sahara_send_reset(context); + return; + } + + if (size_add(data_offset, data_len) > context->firmware->size) { + dev_err(&context->mhi_dev->dev, "Malformed read_data packet - data offset %d and length %d exceeds file size %zu\n", + data_offset, data_len, context->firmware->size); + sahara_send_reset(context); + return; + } + + for (i = 0; i < SAHARA_NUM_TX_BUF && data_len; ++i) { + pkt_data_len = min(data_len, SAHARA_PACKET_MAX_SIZE); + + memcpy(context->tx[i], &context->firmware->data[data_offset], pkt_data_len); + + data_offset += pkt_data_len; + data_len -= pkt_data_len; + + ret = mhi_queue_buf(context->mhi_dev, DMA_TO_DEVICE, + context->tx[i], pkt_data_len, + !data_len ? MHI_EOT : MHI_CHAIN); + if (ret) { + dev_err(&context->mhi_dev->dev, "Unable to send read_data response %d\n", + ret); + return; + } + } +} + +static void sahara_end_of_image(struct sahara_context *context) +{ + int ret; + + dev_dbg(&context->mhi_dev->dev, + "END_OF_IMAGE cmd received. length:%d image:%d status:%d\n", + le32_to_cpu(context->rx->length), + le32_to_cpu(context->rx->end_of_image.image), + le32_to_cpu(context->rx->end_of_image.status)); + + if (le32_to_cpu(context->rx->length) != SAHARA_END_OF_IMAGE_LENGTH) { + dev_err(&context->mhi_dev->dev, "Malformed end_of_image packet - length %d\n", + le32_to_cpu(context->rx->length)); + return; + } + + if (context->active_image_id != SAHARA_IMAGE_ID_NONE && + le32_to_cpu(context->rx->end_of_image.image) != context->active_image_id) { + dev_err(&context->mhi_dev->dev, "Malformed end_of_image packet - image %d is not the active image\n", + le32_to_cpu(context->rx->end_of_image.image)); + return; + } + + sahara_release_image(context); + + if (le32_to_cpu(context->rx->end_of_image.status)) + return; + + context->tx[0]->cmd = cpu_to_le32(SAHARA_DONE_CMD); + context->tx[0]->length = cpu_to_le32(SAHARA_DONE_LENGTH); + + ret = mhi_queue_buf(context->mhi_dev, DMA_TO_DEVICE, context->tx[0], + SAHARA_DONE_LENGTH, MHI_EOT); + if (ret) + dev_dbg(&context->mhi_dev->dev, "Unable to send done response %d\n", ret); +} + +static void sahara_processing(struct work_struct *work) +{ + struct sahara_context *context = container_of(work, struct sahara_context, work); + int ret; + + switch (le32_to_cpu(context->rx->cmd)) { + case SAHARA_HELLO_CMD: + sahara_hello(context); + break; + case SAHARA_READ_DATA_CMD: + sahara_read_data(context); + break; + case SAHARA_END_OF_IMAGE_CMD: + sahara_end_of_image(context); + break; + case SAHARA_DONE_RESP_CMD: + /* Intentional do nothing as we don't need to exit an app */ + break; + default: + dev_err(&context->mhi_dev->dev, "Unknown command %d\n", + le32_to_cpu(context->rx->cmd)); + break; + } + + ret = mhi_queue_buf(context->mhi_dev, DMA_FROM_DEVICE, context->rx, + SAHARA_PACKET_MAX_SIZE, MHI_EOT); + if (ret) + dev_err(&context->mhi_dev->dev, "Unable to requeue rx buf %d\n", ret); +} + +static int sahara_mhi_probe(struct mhi_device *mhi_dev, const struct mhi_device_id *id) +{ + struct sahara_context *context; + int ret; + int i; + + context = devm_kzalloc(&mhi_dev->dev, sizeof(*context), GFP_KERNEL); + if (!context) + return -ENOMEM; + + context->rx = devm_kzalloc(&mhi_dev->dev, SAHARA_PACKET_MAX_SIZE, GFP_KERNEL); + if (!context->rx) + return -ENOMEM; + + /* + * AIC100 defines SAHARA_TRANSFER_MAX_SIZE as the largest value it + * will request for READ_DATA. This is larger than + * SAHARA_PACKET_MAX_SIZE, and we need 9x SAHARA_PACKET_MAX_SIZE to + * cover SAHARA_TRANSFER_MAX_SIZE. When the remote side issues a + * READ_DATA, it requires a transfer of the exact size requested. We + * can use MHI_CHAIN to link multiple buffers into a single transfer + * but the remote side will not consume the buffers until it sees an + * EOT, thus we need to allocate enough buffers to put in the tx fifo + * to cover an entire READ_DATA request of the max size. + */ + for (i = 0; i < SAHARA_NUM_TX_BUF; ++i) { + context->tx[i] = devm_kzalloc(&mhi_dev->dev, SAHARA_PACKET_MAX_SIZE, GFP_KERNEL); + if (!context->tx[i]) + return -ENOMEM; + } + + context->mhi_dev = mhi_dev; + INIT_WORK(&context->work, sahara_processing); + context->image_table = aic100_image_table; + context->table_size = ARRAY_SIZE(aic100_image_table); + context->active_image_id = SAHARA_IMAGE_ID_NONE; + dev_set_drvdata(&mhi_dev->dev, context); + + ret = mhi_prepare_for_transfer(mhi_dev); + if (ret) + return ret; + + ret = mhi_queue_buf(mhi_dev, DMA_FROM_DEVICE, context->rx, SAHARA_PACKET_MAX_SIZE, MHI_EOT); + if (ret) { + mhi_unprepare_from_transfer(mhi_dev); + return ret; + } + + return 0; +} + +static void sahara_mhi_remove(struct mhi_device *mhi_dev) +{ + struct sahara_context *context = dev_get_drvdata(&mhi_dev->dev); + + cancel_work_sync(&context->work); + sahara_release_image(context); + mhi_unprepare_from_transfer(mhi_dev); +} + +static void sahara_mhi_ul_xfer_cb(struct mhi_device *mhi_dev, struct mhi_result *mhi_result) +{ +} + +static void sahara_mhi_dl_xfer_cb(struct mhi_device *mhi_dev, struct mhi_result *mhi_result) +{ + struct sahara_context *context = dev_get_drvdata(&mhi_dev->dev); + + if (!mhi_result->transaction_status) + schedule_work(&context->work); +} + +static const struct mhi_device_id sahara_mhi_match_table[] = { + { .chan = "QAIC_SAHARA", }, + {}, +}; + +static struct mhi_driver sahara_mhi_driver = { + .id_table = sahara_mhi_match_table, + .remove = sahara_mhi_remove, + .probe = sahara_mhi_probe, + .ul_xfer_cb = sahara_mhi_ul_xfer_cb, + .dl_xfer_cb = sahara_mhi_dl_xfer_cb, + .driver = { + .name = "sahara", + }, +}; + +int sahara_register(void) +{ + return mhi_driver_register(&sahara_mhi_driver); +} + +void sahara_unregister(void) +{ + mhi_driver_unregister(&sahara_mhi_driver); +} diff --git a/drivers/accel/qaic/sahara.h b/drivers/accel/qaic/sahara.h new file mode 100644 index 000000000000..640208acc0d1 --- /dev/null +++ b/drivers/accel/qaic/sahara.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +/* Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved. */ + +#ifndef __SAHARA_H__ +#define __SAHARA_H__ + +int sahara_register(void); +void sahara_unregister(void); +#endif /* __SAHARA_H__ */ |