diff options
Diffstat (limited to 'drivers/crypto/intel/iaa/iaa_crypto_main.c')
-rw-r--r-- | drivers/crypto/intel/iaa/iaa_crypto_main.c | 327 |
1 files changed, 326 insertions, 1 deletions
diff --git a/drivers/crypto/intel/iaa/iaa_crypto_main.c b/drivers/crypto/intel/iaa/iaa_crypto_main.c index 925b8fea0d06..4ec7a9269243 100644 --- a/drivers/crypto/intel/iaa/iaa_crypto_main.c +++ b/drivers/crypto/intel/iaa/iaa_crypto_main.c @@ -66,6 +66,299 @@ static void wq_table_clear_entry(int cpu) static LIST_HEAD(iaa_devices); static DEFINE_MUTEX(iaa_devices_lock); +static struct iaa_compression_mode *iaa_compression_modes[IAA_COMP_MODES_MAX]; + +static int find_empty_iaa_compression_mode(void) +{ + int i = -EINVAL; + + for (i = 0; i < IAA_COMP_MODES_MAX; i++) { + if (iaa_compression_modes[i]) + continue; + break; + } + + return i; +} + +static struct iaa_compression_mode *find_iaa_compression_mode(const char *name, int *idx) +{ + struct iaa_compression_mode *mode; + int i; + + for (i = 0; i < IAA_COMP_MODES_MAX; i++) { + mode = iaa_compression_modes[i]; + if (!mode) + continue; + + if (!strcmp(mode->name, name)) { + *idx = i; + return iaa_compression_modes[i]; + } + } + + return NULL; +} + +static void free_iaa_compression_mode(struct iaa_compression_mode *mode) +{ + kfree(mode->name); + kfree(mode->ll_table); + kfree(mode->d_table); + kfree(mode->header_table); + + kfree(mode); +} + +/* + * IAA Compression modes are defined by an ll_table, a d_table, and an + * optional header_table. These tables are typically generated and + * captured using statistics collected from running actual + * compress/decompress workloads. + * + * A module or other kernel code can add and remove compression modes + * with a given name using the exported @add_iaa_compression_mode() + * and @remove_iaa_compression_mode functions. + * + * When a new compression mode is added, the tables are saved in a + * global compression mode list. When IAA devices are added, a + * per-IAA device dma mapping is created for each IAA device, for each + * compression mode. These are the tables used to do the actual + * compression/deccompression and are unmapped if/when the devices are + * removed. Currently, compression modes must be added before any + * device is added, and removed after all devices have been removed. + */ + +/** + * remove_iaa_compression_mode - Remove an IAA compression mode + * @name: The name the compression mode will be known as + * + * Remove the IAA compression mode named @name. + */ +void remove_iaa_compression_mode(const char *name) +{ + struct iaa_compression_mode *mode; + int idx; + + mutex_lock(&iaa_devices_lock); + + if (!list_empty(&iaa_devices)) + goto out; + + mode = find_iaa_compression_mode(name, &idx); + if (mode) { + free_iaa_compression_mode(mode); + iaa_compression_modes[idx] = NULL; + } +out: + mutex_unlock(&iaa_devices_lock); +} +EXPORT_SYMBOL_GPL(remove_iaa_compression_mode); + +/** + * add_iaa_compression_mode - Add an IAA compression mode + * @name: The name the compression mode will be known as + * @ll_table: The ll table + * @ll_table_size: The ll table size in bytes + * @d_table: The d table + * @d_table_size: The d table size in bytes + * @header_table: Optional header table + * @header_table_size: Optional header table size in bytes + * @gen_decomp_table_flags: Otional flags used to generate the decomp table + * @init: Optional callback function to init the compression mode data + * @free: Optional callback function to free the compression mode data + * + * Add a new IAA compression mode named @name. + * + * Returns 0 if successful, errcode otherwise. + */ +int add_iaa_compression_mode(const char *name, + const u32 *ll_table, + int ll_table_size, + const u32 *d_table, + int d_table_size, + const u8 *header_table, + int header_table_size, + u16 gen_decomp_table_flags, + iaa_dev_comp_init_fn_t init, + iaa_dev_comp_free_fn_t free) +{ + struct iaa_compression_mode *mode; + int idx, ret = -ENOMEM; + + mutex_lock(&iaa_devices_lock); + + if (!list_empty(&iaa_devices)) { + ret = -EBUSY; + goto out; + } + + mode = kzalloc(sizeof(*mode), GFP_KERNEL); + if (!mode) + goto out; + + mode->name = kstrdup(name, GFP_KERNEL); + if (!mode->name) + goto free; + + if (ll_table) { + mode->ll_table = kzalloc(ll_table_size, GFP_KERNEL); + if (!mode->ll_table) + goto free; + memcpy(mode->ll_table, ll_table, ll_table_size); + mode->ll_table_size = ll_table_size; + } + + if (d_table) { + mode->d_table = kzalloc(d_table_size, GFP_KERNEL); + if (!mode->d_table) + goto free; + memcpy(mode->d_table, d_table, d_table_size); + mode->d_table_size = d_table_size; + } + + if (header_table) { + mode->header_table = kzalloc(header_table_size, GFP_KERNEL); + if (!mode->header_table) + goto free; + memcpy(mode->header_table, header_table, header_table_size); + mode->header_table_size = header_table_size; + } + + mode->gen_decomp_table_flags = gen_decomp_table_flags; + + mode->init = init; + mode->free = free; + + idx = find_empty_iaa_compression_mode(); + if (idx < 0) + goto free; + + pr_debug("IAA compression mode %s added at idx %d\n", + mode->name, idx); + + iaa_compression_modes[idx] = mode; + + ret = 0; +out: + mutex_unlock(&iaa_devices_lock); + + return ret; +free: + free_iaa_compression_mode(mode); + goto out; +} +EXPORT_SYMBOL_GPL(add_iaa_compression_mode); + +static void free_device_compression_mode(struct iaa_device *iaa_device, + struct iaa_device_compression_mode *device_mode) +{ + size_t size = sizeof(struct aecs_comp_table_record) + IAA_AECS_ALIGN; + struct device *dev = &iaa_device->idxd->pdev->dev; + + kfree(device_mode->name); + + if (device_mode->aecs_comp_table) + dma_free_coherent(dev, size, device_mode->aecs_comp_table, + device_mode->aecs_comp_table_dma_addr); + if (device_mode->aecs_decomp_table) + dma_free_coherent(dev, size, device_mode->aecs_decomp_table, + device_mode->aecs_decomp_table_dma_addr); + + kfree(device_mode); +} + +static int init_device_compression_mode(struct iaa_device *iaa_device, + struct iaa_compression_mode *mode, + int idx, struct idxd_wq *wq) +{ + size_t size = sizeof(struct aecs_comp_table_record) + IAA_AECS_ALIGN; + struct device *dev = &iaa_device->idxd->pdev->dev; + struct iaa_device_compression_mode *device_mode; + int ret = -ENOMEM; + + device_mode = kzalloc(sizeof(*device_mode), GFP_KERNEL); + if (!device_mode) + return -ENOMEM; + + device_mode->name = kstrdup(mode->name, GFP_KERNEL); + if (!device_mode->name) + goto free; + + device_mode->aecs_comp_table = dma_alloc_coherent(dev, size, + &device_mode->aecs_comp_table_dma_addr, GFP_KERNEL); + if (!device_mode->aecs_comp_table) + goto free; + + device_mode->aecs_decomp_table = dma_alloc_coherent(dev, size, + &device_mode->aecs_decomp_table_dma_addr, GFP_KERNEL); + if (!device_mode->aecs_decomp_table) + goto free; + + /* Add Huffman table to aecs */ + memset(device_mode->aecs_comp_table, 0, sizeof(*device_mode->aecs_comp_table)); + memcpy(device_mode->aecs_comp_table->ll_sym, mode->ll_table, mode->ll_table_size); + memcpy(device_mode->aecs_comp_table->d_sym, mode->d_table, mode->d_table_size); + + if (mode->init) { + ret = mode->init(device_mode); + if (ret) + goto free; + } + + /* mode index should match iaa_compression_modes idx */ + iaa_device->compression_modes[idx] = device_mode; + + pr_debug("IAA %s compression mode initialized for iaa device %d\n", + mode->name, iaa_device->idxd->id); + + ret = 0; +out: + return ret; +free: + pr_debug("IAA %s compression mode initialization failed for iaa device %d\n", + mode->name, iaa_device->idxd->id); + + free_device_compression_mode(iaa_device, device_mode); + goto out; +} + +static int init_device_compression_modes(struct iaa_device *iaa_device, + struct idxd_wq *wq) +{ + struct iaa_compression_mode *mode; + int i, ret = 0; + + for (i = 0; i < IAA_COMP_MODES_MAX; i++) { + mode = iaa_compression_modes[i]; + if (!mode) + continue; + + ret = init_device_compression_mode(iaa_device, mode, i, wq); + if (ret) + break; + } + + return ret; +} + +static void remove_device_compression_modes(struct iaa_device *iaa_device) +{ + struct iaa_device_compression_mode *device_mode; + int i; + + for (i = 0; i < IAA_COMP_MODES_MAX; i++) { + device_mode = iaa_device->compression_modes[i]; + if (!device_mode) + continue; + + free_device_compression_mode(iaa_device, device_mode); + iaa_device->compression_modes[i] = NULL; + if (iaa_compression_modes[i]->free) + iaa_compression_modes[i]->free(device_mode); + } +} + static struct iaa_device *iaa_device_alloc(void) { struct iaa_device *iaa_device; @@ -120,8 +413,21 @@ static struct iaa_device *add_iaa_device(struct idxd_device *idxd) return iaa_device; } +static int init_iaa_device(struct iaa_device *iaa_device, struct iaa_wq *iaa_wq) +{ + int ret = 0; + + ret = init_device_compression_modes(iaa_device, iaa_wq->wq); + if (ret) + return ret; + + return ret; +} + static void del_iaa_device(struct iaa_device *iaa_device) { + remove_device_compression_modes(iaa_device); + list_del(&iaa_device->list); iaa_device_free(iaa_device); @@ -276,6 +582,13 @@ static int save_iaa_wq(struct idxd_wq *wq) del_iaa_device(new_device); goto out; } + + ret = init_iaa_device(new_device, new_wq); + if (ret) { + del_iaa_wq(new_device, new_wq->wq); + del_iaa_device(new_device); + goto out; + } } if (WARN_ON(nr_iaa == 0)) @@ -517,20 +830,32 @@ static int __init iaa_crypto_init_module(void) nr_nodes = num_online_nodes(); nr_cpus_per_node = nr_cpus / nr_nodes; + ret = iaa_aecs_init_fixed(); + if (ret < 0) { + pr_debug("IAA fixed compression mode init failed\n"); + goto out; + } + ret = idxd_driver_register(&iaa_crypto_driver); if (ret) { pr_debug("IAA wq sub-driver registration failed\n"); - goto out; + goto err_driver_reg; } pr_debug("initialized\n"); out: return ret; + +err_driver_reg: + iaa_aecs_cleanup_fixed(); + + goto out; } static void __exit iaa_crypto_cleanup_module(void) { idxd_driver_unregister(&iaa_crypto_driver); + iaa_aecs_cleanup_fixed(); pr_debug("cleaned up\n"); } |