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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/crypto/intel/qat/qat_common/adf_transport.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/crypto/intel/qat/qat_common/adf_transport.c')
-rw-r--r-- | drivers/crypto/intel/qat/qat_common/adf_transport.c | 577 |
1 files changed, 577 insertions, 0 deletions
diff --git a/drivers/crypto/intel/qat/qat_common/adf_transport.c b/drivers/crypto/intel/qat/qat_common/adf_transport.c new file mode 100644 index 0000000000..630d0483c4 --- /dev/null +++ b/drivers/crypto/intel/qat/qat_common/adf_transport.c @@ -0,0 +1,577 @@ +// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only) +/* Copyright(c) 2014 - 2020 Intel Corporation */ +#include <linux/delay.h> +#include <linux/nospec.h> +#include "adf_accel_devices.h" +#include "adf_transport_internal.h" +#include "adf_transport_access_macros.h" +#include "adf_cfg.h" +#include "adf_common_drv.h" + +#define ADF_MAX_RING_THRESHOLD 80 +#define ADF_PERCENT(tot, percent) (((tot) * (percent)) / 100) + +static inline u32 adf_modulo(u32 data, u32 shift) +{ + u32 div = data >> shift; + u32 mult = div << shift; + + return data - mult; +} + +static inline int adf_check_ring_alignment(u64 addr, u64 size) +{ + if (((size - 1) & addr) != 0) + return -EFAULT; + return 0; +} + +static int adf_verify_ring_size(u32 msg_size, u32 msg_num) +{ + int i = ADF_MIN_RING_SIZE; + + for (; i <= ADF_MAX_RING_SIZE; i++) + if ((msg_size * msg_num) == ADF_SIZE_TO_RING_SIZE_IN_BYTES(i)) + return i; + + return ADF_DEFAULT_RING_SIZE; +} + +static int adf_reserve_ring(struct adf_etr_bank_data *bank, u32 ring) +{ + spin_lock(&bank->lock); + if (bank->ring_mask & (1 << ring)) { + spin_unlock(&bank->lock); + return -EFAULT; + } + bank->ring_mask |= (1 << ring); + spin_unlock(&bank->lock); + return 0; +} + +static void adf_unreserve_ring(struct adf_etr_bank_data *bank, u32 ring) +{ + spin_lock(&bank->lock); + bank->ring_mask &= ~(1 << ring); + spin_unlock(&bank->lock); +} + +static void adf_enable_ring_irq(struct adf_etr_bank_data *bank, u32 ring) +{ + struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(bank->accel_dev); + + spin_lock_bh(&bank->lock); + bank->irq_mask |= (1 << ring); + spin_unlock_bh(&bank->lock); + csr_ops->write_csr_int_col_en(bank->csr_addr, bank->bank_number, + bank->irq_mask); + csr_ops->write_csr_int_col_ctl(bank->csr_addr, bank->bank_number, + bank->irq_coalesc_timer); +} + +static void adf_disable_ring_irq(struct adf_etr_bank_data *bank, u32 ring) +{ + struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(bank->accel_dev); + + spin_lock_bh(&bank->lock); + bank->irq_mask &= ~(1 << ring); + spin_unlock_bh(&bank->lock); + csr_ops->write_csr_int_col_en(bank->csr_addr, bank->bank_number, + bank->irq_mask); +} + +bool adf_ring_nearly_full(struct adf_etr_ring_data *ring) +{ + return atomic_read(ring->inflights) > ring->threshold; +} + +int adf_send_message(struct adf_etr_ring_data *ring, u32 *msg) +{ + struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(ring->bank->accel_dev); + + if (atomic_add_return(1, ring->inflights) > + ADF_MAX_INFLIGHTS(ring->ring_size, ring->msg_size)) { + atomic_dec(ring->inflights); + return -EAGAIN; + } + spin_lock_bh(&ring->lock); + memcpy((void *)((uintptr_t)ring->base_addr + ring->tail), msg, + ADF_MSG_SIZE_TO_BYTES(ring->msg_size)); + + ring->tail = adf_modulo(ring->tail + + ADF_MSG_SIZE_TO_BYTES(ring->msg_size), + ADF_RING_SIZE_MODULO(ring->ring_size)); + csr_ops->write_csr_ring_tail(ring->bank->csr_addr, + ring->bank->bank_number, ring->ring_number, + ring->tail); + spin_unlock_bh(&ring->lock); + + return 0; +} + +static int adf_handle_response(struct adf_etr_ring_data *ring) +{ + struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(ring->bank->accel_dev); + u32 msg_counter = 0; + u32 *msg = (u32 *)((uintptr_t)ring->base_addr + ring->head); + + while (*msg != ADF_RING_EMPTY_SIG) { + ring->callback((u32 *)msg); + atomic_dec(ring->inflights); + *msg = ADF_RING_EMPTY_SIG; + ring->head = adf_modulo(ring->head + + ADF_MSG_SIZE_TO_BYTES(ring->msg_size), + ADF_RING_SIZE_MODULO(ring->ring_size)); + msg_counter++; + msg = (u32 *)((uintptr_t)ring->base_addr + ring->head); + } + if (msg_counter > 0) { + csr_ops->write_csr_ring_head(ring->bank->csr_addr, + ring->bank->bank_number, + ring->ring_number, ring->head); + } + return 0; +} + +static void adf_configure_tx_ring(struct adf_etr_ring_data *ring) +{ + struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(ring->bank->accel_dev); + u32 ring_config = BUILD_RING_CONFIG(ring->ring_size); + + csr_ops->write_csr_ring_config(ring->bank->csr_addr, + ring->bank->bank_number, + ring->ring_number, ring_config); + +} + +static void adf_configure_rx_ring(struct adf_etr_ring_data *ring) +{ + struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(ring->bank->accel_dev); + u32 ring_config = + BUILD_RESP_RING_CONFIG(ring->ring_size, + ADF_RING_NEAR_WATERMARK_512, + ADF_RING_NEAR_WATERMARK_0); + + csr_ops->write_csr_ring_config(ring->bank->csr_addr, + ring->bank->bank_number, + ring->ring_number, ring_config); +} + +static int adf_init_ring(struct adf_etr_ring_data *ring) +{ + struct adf_etr_bank_data *bank = ring->bank; + struct adf_accel_dev *accel_dev = bank->accel_dev; + struct adf_hw_device_data *hw_data = accel_dev->hw_device; + struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(accel_dev); + u64 ring_base; + u32 ring_size_bytes = + ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size); + + ring_size_bytes = ADF_RING_SIZE_BYTES_MIN(ring_size_bytes); + ring->base_addr = dma_alloc_coherent(&GET_DEV(accel_dev), + ring_size_bytes, &ring->dma_addr, + GFP_KERNEL); + if (!ring->base_addr) + return -ENOMEM; + + memset(ring->base_addr, 0x7F, ring_size_bytes); + /* The base_addr has to be aligned to the size of the buffer */ + if (adf_check_ring_alignment(ring->dma_addr, ring_size_bytes)) { + dev_err(&GET_DEV(accel_dev), "Ring address not aligned\n"); + dma_free_coherent(&GET_DEV(accel_dev), ring_size_bytes, + ring->base_addr, ring->dma_addr); + ring->base_addr = NULL; + return -EFAULT; + } + + if (hw_data->tx_rings_mask & (1 << ring->ring_number)) + adf_configure_tx_ring(ring); + + else + adf_configure_rx_ring(ring); + + ring_base = csr_ops->build_csr_ring_base_addr(ring->dma_addr, + ring->ring_size); + + csr_ops->write_csr_ring_base(ring->bank->csr_addr, + ring->bank->bank_number, ring->ring_number, + ring_base); + spin_lock_init(&ring->lock); + return 0; +} + +static void adf_cleanup_ring(struct adf_etr_ring_data *ring) +{ + u32 ring_size_bytes = + ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size); + ring_size_bytes = ADF_RING_SIZE_BYTES_MIN(ring_size_bytes); + + if (ring->base_addr) { + memset(ring->base_addr, 0x7F, ring_size_bytes); + dma_free_coherent(&GET_DEV(ring->bank->accel_dev), + ring_size_bytes, ring->base_addr, + ring->dma_addr); + } +} + +int adf_create_ring(struct adf_accel_dev *accel_dev, const char *section, + u32 bank_num, u32 num_msgs, + u32 msg_size, const char *ring_name, + adf_callback_fn callback, int poll_mode, + struct adf_etr_ring_data **ring_ptr) +{ + struct adf_etr_data *transport_data = accel_dev->transport; + u8 num_rings_per_bank = GET_NUM_RINGS_PER_BANK(accel_dev); + struct adf_etr_bank_data *bank; + struct adf_etr_ring_data *ring; + char val[ADF_CFG_MAX_VAL_LEN_IN_BYTES]; + int max_inflights; + u32 ring_num; + int ret; + + if (bank_num >= GET_MAX_BANKS(accel_dev)) { + dev_err(&GET_DEV(accel_dev), "Invalid bank number\n"); + return -EFAULT; + } + if (msg_size > ADF_MSG_SIZE_TO_BYTES(ADF_MAX_MSG_SIZE)) { + dev_err(&GET_DEV(accel_dev), "Invalid msg size\n"); + return -EFAULT; + } + if (ADF_MAX_INFLIGHTS(adf_verify_ring_size(msg_size, num_msgs), + ADF_BYTES_TO_MSG_SIZE(msg_size)) < 2) { + dev_err(&GET_DEV(accel_dev), + "Invalid ring size for given msg size\n"); + return -EFAULT; + } + if (adf_cfg_get_param_value(accel_dev, section, ring_name, val)) { + dev_err(&GET_DEV(accel_dev), "Section %s, no such entry : %s\n", + section, ring_name); + return -EFAULT; + } + if (kstrtouint(val, 10, &ring_num)) { + dev_err(&GET_DEV(accel_dev), "Can't get ring number\n"); + return -EFAULT; + } + if (ring_num >= num_rings_per_bank) { + dev_err(&GET_DEV(accel_dev), "Invalid ring number\n"); + return -EFAULT; + } + + ring_num = array_index_nospec(ring_num, num_rings_per_bank); + bank = &transport_data->banks[bank_num]; + if (adf_reserve_ring(bank, ring_num)) { + dev_err(&GET_DEV(accel_dev), "Ring %d, %s already exists.\n", + ring_num, ring_name); + return -EFAULT; + } + ring = &bank->rings[ring_num]; + ring->ring_number = ring_num; + ring->bank = bank; + ring->callback = callback; + ring->msg_size = ADF_BYTES_TO_MSG_SIZE(msg_size); + ring->ring_size = adf_verify_ring_size(msg_size, num_msgs); + ring->head = 0; + ring->tail = 0; + max_inflights = ADF_MAX_INFLIGHTS(ring->ring_size, ring->msg_size); + ring->threshold = ADF_PERCENT(max_inflights, ADF_MAX_RING_THRESHOLD); + atomic_set(ring->inflights, 0); + ret = adf_init_ring(ring); + if (ret) + goto err; + + /* Enable HW arbitration for the given ring */ + adf_update_ring_arb(ring); + + if (adf_ring_debugfs_add(ring, ring_name)) { + dev_err(&GET_DEV(accel_dev), + "Couldn't add ring debugfs entry\n"); + ret = -EFAULT; + goto err; + } + + /* Enable interrupts if needed */ + if (callback && (!poll_mode)) + adf_enable_ring_irq(bank, ring->ring_number); + *ring_ptr = ring; + return 0; +err: + adf_cleanup_ring(ring); + adf_unreserve_ring(bank, ring_num); + adf_update_ring_arb(ring); + return ret; +} + +void adf_remove_ring(struct adf_etr_ring_data *ring) +{ + struct adf_etr_bank_data *bank = ring->bank; + struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(bank->accel_dev); + + /* Disable interrupts for the given ring */ + adf_disable_ring_irq(bank, ring->ring_number); + + /* Clear PCI config space */ + + csr_ops->write_csr_ring_config(bank->csr_addr, bank->bank_number, + ring->ring_number, 0); + csr_ops->write_csr_ring_base(bank->csr_addr, bank->bank_number, + ring->ring_number, 0); + adf_ring_debugfs_rm(ring); + adf_unreserve_ring(bank, ring->ring_number); + /* Disable HW arbitration for the given ring */ + adf_update_ring_arb(ring); + adf_cleanup_ring(ring); +} + +static void adf_ring_response_handler(struct adf_etr_bank_data *bank) +{ + struct adf_accel_dev *accel_dev = bank->accel_dev; + u8 num_rings_per_bank = GET_NUM_RINGS_PER_BANK(accel_dev); + struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(accel_dev); + unsigned long empty_rings; + int i; + + empty_rings = csr_ops->read_csr_e_stat(bank->csr_addr, + bank->bank_number); + empty_rings = ~empty_rings & bank->irq_mask; + + for_each_set_bit(i, &empty_rings, num_rings_per_bank) + adf_handle_response(&bank->rings[i]); +} + +void adf_response_handler(uintptr_t bank_addr) +{ + struct adf_etr_bank_data *bank = (void *)bank_addr; + struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(bank->accel_dev); + + /* Handle all the responses and reenable IRQs */ + adf_ring_response_handler(bank); + + csr_ops->write_csr_int_flag_and_col(bank->csr_addr, bank->bank_number, + bank->irq_mask); +} + +static inline int adf_get_cfg_int(struct adf_accel_dev *accel_dev, + const char *section, const char *format, + u32 key, u32 *value) +{ + char key_buf[ADF_CFG_MAX_KEY_LEN_IN_BYTES]; + char val_buf[ADF_CFG_MAX_VAL_LEN_IN_BYTES]; + + snprintf(key_buf, ADF_CFG_MAX_KEY_LEN_IN_BYTES, format, key); + + if (adf_cfg_get_param_value(accel_dev, section, key_buf, val_buf)) + return -EFAULT; + + if (kstrtouint(val_buf, 10, value)) + return -EFAULT; + return 0; +} + +static void adf_get_coalesc_timer(struct adf_etr_bank_data *bank, + const char *section, + u32 bank_num_in_accel) +{ + if (adf_get_cfg_int(bank->accel_dev, section, + ADF_ETRMGR_COALESCE_TIMER_FORMAT, + bank_num_in_accel, &bank->irq_coalesc_timer)) + bank->irq_coalesc_timer = ADF_COALESCING_DEF_TIME; + + if (ADF_COALESCING_MAX_TIME < bank->irq_coalesc_timer || + ADF_COALESCING_MIN_TIME > bank->irq_coalesc_timer) + bank->irq_coalesc_timer = ADF_COALESCING_DEF_TIME; +} + +static int adf_init_bank(struct adf_accel_dev *accel_dev, + struct adf_etr_bank_data *bank, + u32 bank_num, void __iomem *csr_addr) +{ + struct adf_hw_device_data *hw_data = accel_dev->hw_device; + u8 num_rings_per_bank = hw_data->num_rings_per_bank; + struct adf_hw_csr_ops *csr_ops = &hw_data->csr_ops; + u32 irq_mask = BIT(num_rings_per_bank) - 1; + struct adf_etr_ring_data *ring; + struct adf_etr_ring_data *tx_ring; + u32 i, coalesc_enabled = 0; + unsigned long ring_mask; + int size; + + memset(bank, 0, sizeof(*bank)); + bank->bank_number = bank_num; + bank->csr_addr = csr_addr; + bank->accel_dev = accel_dev; + spin_lock_init(&bank->lock); + + /* Allocate the rings in the bank */ + size = num_rings_per_bank * sizeof(struct adf_etr_ring_data); + bank->rings = kzalloc_node(size, GFP_KERNEL, + dev_to_node(&GET_DEV(accel_dev))); + if (!bank->rings) + return -ENOMEM; + + /* Enable IRQ coalescing always. This will allow to use + * the optimised flag and coalesc register. + * If it is disabled in the config file just use min time value */ + if ((adf_get_cfg_int(accel_dev, "Accelerator0", + ADF_ETRMGR_COALESCING_ENABLED_FORMAT, bank_num, + &coalesc_enabled) == 0) && coalesc_enabled) + adf_get_coalesc_timer(bank, "Accelerator0", bank_num); + else + bank->irq_coalesc_timer = ADF_COALESCING_MIN_TIME; + + for (i = 0; i < num_rings_per_bank; i++) { + csr_ops->write_csr_ring_config(csr_addr, bank_num, i, 0); + csr_ops->write_csr_ring_base(csr_addr, bank_num, i, 0); + + ring = &bank->rings[i]; + if (hw_data->tx_rings_mask & (1 << i)) { + ring->inflights = + kzalloc_node(sizeof(atomic_t), + GFP_KERNEL, + dev_to_node(&GET_DEV(accel_dev))); + if (!ring->inflights) + goto err; + } else { + if (i < hw_data->tx_rx_gap) { + dev_err(&GET_DEV(accel_dev), + "Invalid tx rings mask config\n"); + goto err; + } + tx_ring = &bank->rings[i - hw_data->tx_rx_gap]; + ring->inflights = tx_ring->inflights; + } + } + if (adf_bank_debugfs_add(bank)) { + dev_err(&GET_DEV(accel_dev), + "Failed to add bank debugfs entry\n"); + goto err; + } + + csr_ops->write_csr_int_flag(csr_addr, bank_num, irq_mask); + csr_ops->write_csr_int_srcsel(csr_addr, bank_num); + + return 0; +err: + ring_mask = hw_data->tx_rings_mask; + for_each_set_bit(i, &ring_mask, num_rings_per_bank) { + ring = &bank->rings[i]; + kfree(ring->inflights); + ring->inflights = NULL; + } + kfree(bank->rings); + return -ENOMEM; +} + +/** + * adf_init_etr_data() - Initialize transport rings for acceleration device + * @accel_dev: Pointer to acceleration device. + * + * Function is the initializes the communications channels (rings) to the + * acceleration device accel_dev. + * To be used by QAT device specific drivers. + * + * Return: 0 on success, error code otherwise. + */ +int adf_init_etr_data(struct adf_accel_dev *accel_dev) +{ + struct adf_etr_data *etr_data; + struct adf_hw_device_data *hw_data = accel_dev->hw_device; + void __iomem *csr_addr; + u32 size; + u32 num_banks = 0; + int i, ret; + + etr_data = kzalloc_node(sizeof(*etr_data), GFP_KERNEL, + dev_to_node(&GET_DEV(accel_dev))); + if (!etr_data) + return -ENOMEM; + + num_banks = GET_MAX_BANKS(accel_dev); + size = num_banks * sizeof(struct adf_etr_bank_data); + etr_data->banks = kzalloc_node(size, GFP_KERNEL, + dev_to_node(&GET_DEV(accel_dev))); + if (!etr_data->banks) { + ret = -ENOMEM; + goto err_bank; + } + + accel_dev->transport = etr_data; + i = hw_data->get_etr_bar_id(hw_data); + csr_addr = accel_dev->accel_pci_dev.pci_bars[i].virt_addr; + + /* accel_dev->debugfs_dir should always be non-NULL here */ + etr_data->debug = debugfs_create_dir("transport", + accel_dev->debugfs_dir); + + for (i = 0; i < num_banks; i++) { + ret = adf_init_bank(accel_dev, &etr_data->banks[i], i, + csr_addr); + if (ret) + goto err_bank_all; + } + + return 0; + +err_bank_all: + debugfs_remove(etr_data->debug); + kfree(etr_data->banks); +err_bank: + kfree(etr_data); + accel_dev->transport = NULL; + return ret; +} +EXPORT_SYMBOL_GPL(adf_init_etr_data); + +static void cleanup_bank(struct adf_etr_bank_data *bank) +{ + struct adf_accel_dev *accel_dev = bank->accel_dev; + struct adf_hw_device_data *hw_data = accel_dev->hw_device; + u8 num_rings_per_bank = hw_data->num_rings_per_bank; + u32 i; + + for (i = 0; i < num_rings_per_bank; i++) { + struct adf_etr_ring_data *ring = &bank->rings[i]; + + if (bank->ring_mask & (1 << i)) + adf_cleanup_ring(ring); + + if (hw_data->tx_rings_mask & (1 << i)) + kfree(ring->inflights); + } + kfree(bank->rings); + adf_bank_debugfs_rm(bank); + memset(bank, 0, sizeof(*bank)); +} + +static void adf_cleanup_etr_handles(struct adf_accel_dev *accel_dev) +{ + struct adf_etr_data *etr_data = accel_dev->transport; + u32 i, num_banks = GET_MAX_BANKS(accel_dev); + + for (i = 0; i < num_banks; i++) + cleanup_bank(&etr_data->banks[i]); +} + +/** + * adf_cleanup_etr_data() - Clear transport rings for acceleration device + * @accel_dev: Pointer to acceleration device. + * + * Function is the clears the communications channels (rings) of the + * acceleration device accel_dev. + * To be used by QAT device specific drivers. + * + * Return: void + */ +void adf_cleanup_etr_data(struct adf_accel_dev *accel_dev) +{ + struct adf_etr_data *etr_data = accel_dev->transport; + + if (etr_data) { + adf_cleanup_etr_handles(accel_dev); + debugfs_remove(etr_data->debug); + kfree(etr_data->banks->rings); + kfree(etr_data->banks); + kfree(etr_data); + accel_dev->transport = NULL; + } +} +EXPORT_SYMBOL_GPL(adf_cleanup_etr_data); |