diff options
Diffstat (limited to 'drivers/edgetpu/mobile-firmware.c')
| -rw-r--r-- | drivers/edgetpu/mobile-firmware.c | 69 |
1 files changed, 55 insertions, 14 deletions
diff --git a/drivers/edgetpu/mobile-firmware.c b/drivers/edgetpu/mobile-firmware.c index e8f156f..d85b27e 100644 --- a/drivers/edgetpu/mobile-firmware.c +++ b/drivers/edgetpu/mobile-firmware.c @@ -13,6 +13,7 @@ #include <linux/string.h> #include <linux/types.h> +#include <gcip/gcip-alloc-helper.h> #include <gcip/gcip-image-config.h> #include "edgetpu.h" @@ -34,29 +35,69 @@ static int image_config_map(void *data, dma_addr_t daddr, phys_addr_t paddr, siz { struct edgetpu_dev *etdev = data; struct edgetpu_mobile_platform_dev *etmdev = to_mobile_dev(etdev); - bool ns = !(flags & GCIP_IMAGE_CONFIG_FLAGS_SECURE); + struct edgetpu_mobile_fw_ctx *fw_ctx; + int ret; - if (ns) { - if (paddr + size > etmdev->fw_ctx_size) { - etdev_err(etdev, "Insufficient firmware context memory"); - return -ENOSPC; - } - /* - * For non-secure mappings the physical addresses in image config are based on the - * firmware context region. - */ - paddr += etmdev->fw_ctx_paddr; + if (flags & GCIP_IMAGE_CONFIG_FLAGS_SECURE) + return edgetpu_mmu_add_translation(etdev, daddr, paddr, size, + IOMMU_READ | IOMMU_WRITE, EDGETPU_CONTEXT_KCI); + + fw_ctx = kzalloc(sizeof(*fw_ctx), GFP_KERNEL); + if (!fw_ctx) + return -ENOMEM; + + fw_ctx->daddr = daddr; + fw_ctx->size = size; + fw_ctx->sgt = gcip_alloc_noncontiguous(etdev->dev, size, GFP_KERNEL); + if (!fw_ctx->sgt) { + kfree(fw_ctx); + return -ENOMEM; + } + + ret = edgetpu_mmu_map_iova_sgt(etdev, daddr, fw_ctx->sgt, DMA_BIDIRECTIONAL, 0, + EDGETPU_CONTEXT_KCI); + if (ret) { + gcip_free_noncontiguous(fw_ctx->sgt); + kfree(fw_ctx); + return ret; } - return edgetpu_mmu_add_translation(etdev, daddr, paddr, size, - IOMMU_READ | IOMMU_WRITE, EDGETPU_CONTEXT_KCI); + mutex_lock(&etmdev->fw_ctx_list_lock); + list_add_tail(&fw_ctx->list, &etmdev->fw_ctx_list); + mutex_unlock(&etmdev->fw_ctx_list_lock); + + return 0; } static void image_config_unmap(void *data, dma_addr_t daddr, size_t size, unsigned int flags) { struct edgetpu_dev *etdev = data; + struct edgetpu_mobile_platform_dev *etmdev = to_mobile_dev(etdev); + struct edgetpu_mobile_fw_ctx *fw_ctx = NULL, *cur; + + if (flags & GCIP_IMAGE_CONFIG_FLAGS_SECURE) { + edgetpu_mmu_remove_translation(etdev, daddr, size, EDGETPU_CONTEXT_KCI); + return; + } - edgetpu_mmu_remove_translation(etdev, daddr, size, EDGETPU_CONTEXT_KCI); + mutex_lock(&etmdev->fw_ctx_list_lock); + list_for_each_entry(cur, &etmdev->fw_ctx_list, list) { + if (cur->daddr == daddr && cur->size == size) { + fw_ctx = cur; + list_del(&cur->list); + break; + } + } + mutex_unlock(&etmdev->fw_ctx_list_lock); + + if (fw_ctx) { + edgetpu_mmu_unmap_iova_sgt(etdev, daddr, fw_ctx->sgt, DMA_BIDIRECTIONAL, + EDGETPU_CONTEXT_KCI); + gcip_free_noncontiguous(fw_ctx->sgt); + kfree(fw_ctx); + } else { + etdev_warn(etdev, "Firmware context region SG table not found."); + } } static int mobile_firmware_after_create(struct edgetpu_firmware *et_fw) |