diff options
Diffstat (limited to 'drivers/accel/ivpu/ivpu_mmu_context.c')
| -rw-r--r-- | drivers/accel/ivpu/ivpu_mmu_context.c | 511 |
1 files changed, 511 insertions, 0 deletions
diff --git a/drivers/accel/ivpu/ivpu_mmu_context.c b/drivers/accel/ivpu/ivpu_mmu_context.c new file mode 100644 index 000000000..ce94f4029 --- /dev/null +++ b/drivers/accel/ivpu/ivpu_mmu_context.c @@ -0,0 +1,511 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020-2023 Intel Corporation + */ + +#include <linux/bitfield.h> +#include <linux/highmem.h> + +#include "ivpu_drv.h" +#include "ivpu_hw.h" +#include "ivpu_mmu.h" +#include "ivpu_mmu_context.h" + +#define IVPU_MMU_VPU_ADDRESS_MASK GENMASK(47, 12) +#define IVPU_MMU_PGD_INDEX_MASK GENMASK(47, 39) +#define IVPU_MMU_PUD_INDEX_MASK GENMASK(38, 30) +#define IVPU_MMU_PMD_INDEX_MASK GENMASK(29, 21) +#define IVPU_MMU_PTE_INDEX_MASK GENMASK(20, 12) +#define IVPU_MMU_ENTRY_FLAGS_MASK (BIT(52) | GENMASK(11, 0)) +#define IVPU_MMU_ENTRY_FLAG_CONT BIT(52) +#define IVPU_MMU_ENTRY_FLAG_NG BIT(11) +#define IVPU_MMU_ENTRY_FLAG_AF BIT(10) +#define IVPU_MMU_ENTRY_FLAG_USER BIT(6) +#define IVPU_MMU_ENTRY_FLAG_LLC_COHERENT BIT(2) +#define IVPU_MMU_ENTRY_FLAG_TYPE_PAGE BIT(1) +#define IVPU_MMU_ENTRY_FLAG_VALID BIT(0) + +#define IVPU_MMU_PAGE_SIZE SZ_4K +#define IVPU_MMU_CONT_PAGES_SIZE (IVPU_MMU_PAGE_SIZE * 16) +#define IVPU_MMU_PTE_MAP_SIZE (IVPU_MMU_PGTABLE_ENTRIES * IVPU_MMU_PAGE_SIZE) +#define IVPU_MMU_PMD_MAP_SIZE (IVPU_MMU_PGTABLE_ENTRIES * IVPU_MMU_PTE_MAP_SIZE) +#define IVPU_MMU_PUD_MAP_SIZE (IVPU_MMU_PGTABLE_ENTRIES * IVPU_MMU_PMD_MAP_SIZE) +#define IVPU_MMU_PGD_MAP_SIZE (IVPU_MMU_PGTABLE_ENTRIES * IVPU_MMU_PUD_MAP_SIZE) +#define IVPU_MMU_PGTABLE_SIZE (IVPU_MMU_PGTABLE_ENTRIES * sizeof(u64)) + +#define IVPU_MMU_DUMMY_ADDRESS 0xdeadb000 +#define IVPU_MMU_ENTRY_VALID (IVPU_MMU_ENTRY_FLAG_TYPE_PAGE | IVPU_MMU_ENTRY_FLAG_VALID) +#define IVPU_MMU_ENTRY_INVALID (IVPU_MMU_DUMMY_ADDRESS & ~IVPU_MMU_ENTRY_FLAGS_MASK) +#define IVPU_MMU_ENTRY_MAPPED (IVPU_MMU_ENTRY_FLAG_AF | IVPU_MMU_ENTRY_FLAG_USER | \ + IVPU_MMU_ENTRY_FLAG_NG | IVPU_MMU_ENTRY_VALID) + +static int ivpu_mmu_pgtable_init(struct ivpu_device *vdev, struct ivpu_mmu_pgtable *pgtable) +{ + dma_addr_t pgd_dma; + + pgtable->pgd_dma_ptr = dma_alloc_coherent(vdev->drm.dev, IVPU_MMU_PGTABLE_SIZE, &pgd_dma, + GFP_KERNEL); + if (!pgtable->pgd_dma_ptr) + return -ENOMEM; + + pgtable->pgd_dma = pgd_dma; + + return 0; +} + +static void ivpu_mmu_pgtable_free(struct ivpu_device *vdev, u64 *cpu_addr, dma_addr_t dma_addr) +{ + if (cpu_addr) + dma_free_coherent(vdev->drm.dev, IVPU_MMU_PGTABLE_SIZE, cpu_addr, + dma_addr & ~IVPU_MMU_ENTRY_FLAGS_MASK); +} + +static void ivpu_mmu_pgtables_free(struct ivpu_device *vdev, struct ivpu_mmu_pgtable *pgtable) +{ + int pgd_idx, pud_idx, pmd_idx; + dma_addr_t pud_dma, pmd_dma, pte_dma; + u64 *pud_dma_ptr, *pmd_dma_ptr, *pte_dma_ptr; + + for (pgd_idx = 0; pgd_idx < IVPU_MMU_PGTABLE_ENTRIES; ++pgd_idx) { + pud_dma_ptr = pgtable->pud_ptrs[pgd_idx]; + pud_dma = pgtable->pgd_dma_ptr[pgd_idx]; + + if (!pud_dma_ptr) + continue; + + for (pud_idx = 0; pud_idx < IVPU_MMU_PGTABLE_ENTRIES; ++pud_idx) { + pmd_dma_ptr = pgtable->pmd_ptrs[pgd_idx][pud_idx]; + pmd_dma = pgtable->pud_ptrs[pgd_idx][pud_idx]; + + if (!pmd_dma_ptr) + continue; + + for (pmd_idx = 0; pmd_idx < IVPU_MMU_PGTABLE_ENTRIES; ++pmd_idx) { + pte_dma_ptr = pgtable->pte_ptrs[pgd_idx][pud_idx][pmd_idx]; + pte_dma = pgtable->pmd_ptrs[pgd_idx][pud_idx][pmd_idx]; + + ivpu_mmu_pgtable_free(vdev, pte_dma_ptr, pte_dma); + } + + kfree(pgtable->pte_ptrs[pgd_idx][pud_idx]); + ivpu_mmu_pgtable_free(vdev, pmd_dma_ptr, pmd_dma); + } + + kfree(pgtable->pmd_ptrs[pgd_idx]); + kfree(pgtable->pte_ptrs[pgd_idx]); + ivpu_mmu_pgtable_free(vdev, pud_dma_ptr, pud_dma); + } + + ivpu_mmu_pgtable_free(vdev, pgtable->pgd_dma_ptr, pgtable->pgd_dma); +} + +static u64* +ivpu_mmu_ensure_pud(struct ivpu_device *vdev, struct ivpu_mmu_pgtable *pgtable, int pgd_idx) +{ + u64 *pud_dma_ptr = pgtable->pud_ptrs[pgd_idx]; + dma_addr_t pud_dma; + + if (pud_dma_ptr) + return pud_dma_ptr; + + pud_dma_ptr = dma_alloc_wc(vdev->drm.dev, IVPU_MMU_PGTABLE_SIZE, &pud_dma, GFP_KERNEL); + if (!pud_dma_ptr) + return NULL; + + drm_WARN_ON(&vdev->drm, pgtable->pmd_ptrs[pgd_idx]); + pgtable->pmd_ptrs[pgd_idx] = kzalloc(IVPU_MMU_PGTABLE_SIZE, GFP_KERNEL); + if (!pgtable->pmd_ptrs[pgd_idx]) + goto err_free_pud_dma_ptr; + + drm_WARN_ON(&vdev->drm, pgtable->pte_ptrs[pgd_idx]); + pgtable->pte_ptrs[pgd_idx] = kzalloc(IVPU_MMU_PGTABLE_SIZE, GFP_KERNEL); + if (!pgtable->pte_ptrs[pgd_idx]) + goto err_free_pmd_ptrs; + + pgtable->pud_ptrs[pgd_idx] = pud_dma_ptr; + pgtable->pgd_dma_ptr[pgd_idx] = pud_dma | IVPU_MMU_ENTRY_VALID; + + return pud_dma_ptr; + +err_free_pmd_ptrs: + kfree(pgtable->pmd_ptrs[pgd_idx]); + +err_free_pud_dma_ptr: + ivpu_mmu_pgtable_free(vdev, pud_dma_ptr, pud_dma); + return NULL; +} + +static u64* +ivpu_mmu_ensure_pmd(struct ivpu_device *vdev, struct ivpu_mmu_pgtable *pgtable, int pgd_idx, + int pud_idx) +{ + u64 *pmd_dma_ptr = pgtable->pmd_ptrs[pgd_idx][pud_idx]; + dma_addr_t pmd_dma; + + if (pmd_dma_ptr) + return pmd_dma_ptr; + + pmd_dma_ptr = dma_alloc_wc(vdev->drm.dev, IVPU_MMU_PGTABLE_SIZE, &pmd_dma, GFP_KERNEL); + if (!pmd_dma_ptr) + return NULL; + + drm_WARN_ON(&vdev->drm, pgtable->pte_ptrs[pgd_idx][pud_idx]); + pgtable->pte_ptrs[pgd_idx][pud_idx] = kzalloc(IVPU_MMU_PGTABLE_SIZE, GFP_KERNEL); + if (!pgtable->pte_ptrs[pgd_idx][pud_idx]) + goto err_free_pmd_dma_ptr; + + pgtable->pmd_ptrs[pgd_idx][pud_idx] = pmd_dma_ptr; + pgtable->pud_ptrs[pgd_idx][pud_idx] = pmd_dma | IVPU_MMU_ENTRY_VALID; + + return pmd_dma_ptr; + +err_free_pmd_dma_ptr: + ivpu_mmu_pgtable_free(vdev, pmd_dma_ptr, pmd_dma); + return NULL; +} + +static u64* +ivpu_mmu_ensure_pte(struct ivpu_device *vdev, struct ivpu_mmu_pgtable *pgtable, + int pgd_idx, int pud_idx, int pmd_idx) +{ + u64 *pte_dma_ptr = pgtable->pte_ptrs[pgd_idx][pud_idx][pmd_idx]; + dma_addr_t pte_dma; + + if (pte_dma_ptr) + return pte_dma_ptr; + + pte_dma_ptr = dma_alloc_wc(vdev->drm.dev, IVPU_MMU_PGTABLE_SIZE, &pte_dma, GFP_KERNEL); + if (!pte_dma_ptr) + return NULL; + + pgtable->pte_ptrs[pgd_idx][pud_idx][pmd_idx] = pte_dma_ptr; + pgtable->pmd_ptrs[pgd_idx][pud_idx][pmd_idx] = pte_dma | IVPU_MMU_ENTRY_VALID; + + return pte_dma_ptr; +} + +static int +ivpu_mmu_context_map_page(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx, + u64 vpu_addr, dma_addr_t dma_addr, u64 prot) +{ + u64 *pte; + int pgd_idx = FIELD_GET(IVPU_MMU_PGD_INDEX_MASK, vpu_addr); + int pud_idx = FIELD_GET(IVPU_MMU_PUD_INDEX_MASK, vpu_addr); + int pmd_idx = FIELD_GET(IVPU_MMU_PMD_INDEX_MASK, vpu_addr); + int pte_idx = FIELD_GET(IVPU_MMU_PTE_INDEX_MASK, vpu_addr); + + /* Allocate PUD - second level page table if needed */ + if (!ivpu_mmu_ensure_pud(vdev, &ctx->pgtable, pgd_idx)) + return -ENOMEM; + + /* Allocate PMD - third level page table if needed */ + if (!ivpu_mmu_ensure_pmd(vdev, &ctx->pgtable, pgd_idx, pud_idx)) + return -ENOMEM; + + /* Allocate PTE - fourth level page table if needed */ + pte = ivpu_mmu_ensure_pte(vdev, &ctx->pgtable, pgd_idx, pud_idx, pmd_idx); + if (!pte) + return -ENOMEM; + + /* Update PTE */ + pte[pte_idx] = dma_addr | prot; + + return 0; +} + +static int +ivpu_mmu_context_map_cont_64k(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx, u64 vpu_addr, + dma_addr_t dma_addr, u64 prot) +{ + size_t size = IVPU_MMU_CONT_PAGES_SIZE; + + drm_WARN_ON(&vdev->drm, !IS_ALIGNED(vpu_addr, size)); + drm_WARN_ON(&vdev->drm, !IS_ALIGNED(dma_addr, size)); + + prot |= IVPU_MMU_ENTRY_FLAG_CONT; + + while (size) { + int ret = ivpu_mmu_context_map_page(vdev, ctx, vpu_addr, dma_addr, prot); + + if (ret) + return ret; + + size -= IVPU_MMU_PAGE_SIZE; + vpu_addr += IVPU_MMU_PAGE_SIZE; + dma_addr += IVPU_MMU_PAGE_SIZE; + } + + return 0; +} + +static void ivpu_mmu_context_unmap_page(struct ivpu_mmu_context *ctx, u64 vpu_addr) +{ + int pgd_idx = FIELD_GET(IVPU_MMU_PGD_INDEX_MASK, vpu_addr); + int pud_idx = FIELD_GET(IVPU_MMU_PUD_INDEX_MASK, vpu_addr); + int pmd_idx = FIELD_GET(IVPU_MMU_PMD_INDEX_MASK, vpu_addr); + int pte_idx = FIELD_GET(IVPU_MMU_PTE_INDEX_MASK, vpu_addr); + + /* Update PTE with dummy physical address and clear flags */ + ctx->pgtable.pte_ptrs[pgd_idx][pud_idx][pmd_idx][pte_idx] = IVPU_MMU_ENTRY_INVALID; +} + +static void +ivpu_mmu_context_flush_page_tables(struct ivpu_mmu_context *ctx, u64 vpu_addr, size_t size) +{ + struct ivpu_mmu_pgtable *pgtable = &ctx->pgtable; + u64 end_addr = vpu_addr + size; + + /* Align to PMD entry (2 MB) */ + vpu_addr &= ~(IVPU_MMU_PTE_MAP_SIZE - 1); + + while (vpu_addr < end_addr) { + int pgd_idx = FIELD_GET(IVPU_MMU_PGD_INDEX_MASK, vpu_addr); + u64 pud_end = (pgd_idx + 1) * (u64)IVPU_MMU_PUD_MAP_SIZE; + + while (vpu_addr < end_addr && vpu_addr < pud_end) { + int pud_idx = FIELD_GET(IVPU_MMU_PUD_INDEX_MASK, vpu_addr); + u64 pmd_end = (pud_idx + 1) * (u64)IVPU_MMU_PMD_MAP_SIZE; + + while (vpu_addr < end_addr && vpu_addr < pmd_end) { + int pmd_idx = FIELD_GET(IVPU_MMU_PMD_INDEX_MASK, vpu_addr); + + clflush_cache_range(pgtable->pte_ptrs[pgd_idx][pud_idx][pmd_idx], + IVPU_MMU_PGTABLE_SIZE); + vpu_addr += IVPU_MMU_PTE_MAP_SIZE; + } + clflush_cache_range(pgtable->pmd_ptrs[pgd_idx][pud_idx], + IVPU_MMU_PGTABLE_SIZE); + } + clflush_cache_range(pgtable->pud_ptrs[pgd_idx], IVPU_MMU_PGTABLE_SIZE); + } + clflush_cache_range(pgtable->pgd_dma_ptr, IVPU_MMU_PGTABLE_SIZE); +} + +static int +ivpu_mmu_context_map_pages(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx, + u64 vpu_addr, dma_addr_t dma_addr, size_t size, u64 prot) +{ + int map_size; + int ret; + + while (size) { + if (!ivpu_disable_mmu_cont_pages && size >= IVPU_MMU_CONT_PAGES_SIZE && + IS_ALIGNED(vpu_addr | dma_addr, IVPU_MMU_CONT_PAGES_SIZE)) { + ret = ivpu_mmu_context_map_cont_64k(vdev, ctx, vpu_addr, dma_addr, prot); + map_size = IVPU_MMU_CONT_PAGES_SIZE; + } else { + ret = ivpu_mmu_context_map_page(vdev, ctx, vpu_addr, dma_addr, prot); + map_size = IVPU_MMU_PAGE_SIZE; + } + + if (ret) + return ret; + + vpu_addr += map_size; + dma_addr += map_size; + size -= map_size; + } + + return 0; +} + +static void ivpu_mmu_context_unmap_pages(struct ivpu_mmu_context *ctx, u64 vpu_addr, size_t size) +{ + while (size) { + ivpu_mmu_context_unmap_page(ctx, vpu_addr); + vpu_addr += IVPU_MMU_PAGE_SIZE; + size -= IVPU_MMU_PAGE_SIZE; + } +} + +int +ivpu_mmu_context_map_sgt(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx, + u64 vpu_addr, struct sg_table *sgt, bool llc_coherent) +{ + struct scatterlist *sg; + int ret; + u64 prot; + u64 i; + + if (!IS_ALIGNED(vpu_addr, IVPU_MMU_PAGE_SIZE)) + return -EINVAL; + + if (vpu_addr & ~IVPU_MMU_VPU_ADDRESS_MASK) + return -EINVAL; + + prot = IVPU_MMU_ENTRY_MAPPED; + if (llc_coherent) + prot |= IVPU_MMU_ENTRY_FLAG_LLC_COHERENT; + + mutex_lock(&ctx->lock); + + for_each_sgtable_dma_sg(sgt, sg, i) { + dma_addr_t dma_addr = sg_dma_address(sg) - sg->offset; + size_t size = sg_dma_len(sg) + sg->offset; + + ret = ivpu_mmu_context_map_pages(vdev, ctx, vpu_addr, dma_addr, size, prot); + if (ret) { + ivpu_err(vdev, "Failed to map context pages\n"); + mutex_unlock(&ctx->lock); + return ret; + } + ivpu_mmu_context_flush_page_tables(ctx, vpu_addr, size); + vpu_addr += size; + } + + mutex_unlock(&ctx->lock); + + ret = ivpu_mmu_invalidate_tlb(vdev, ctx->id); + if (ret) + ivpu_err(vdev, "Failed to invalidate TLB for ctx %u: %d\n", ctx->id, ret); + return ret; +} + +void +ivpu_mmu_context_unmap_sgt(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx, + u64 vpu_addr, struct sg_table *sgt) +{ + struct scatterlist *sg; + int ret; + u64 i; + + if (!IS_ALIGNED(vpu_addr, IVPU_MMU_PAGE_SIZE)) + ivpu_warn(vdev, "Unaligned vpu_addr: 0x%llx\n", vpu_addr); + + mutex_lock(&ctx->lock); + + for_each_sgtable_dma_sg(sgt, sg, i) { + size_t size = sg_dma_len(sg) + sg->offset; + + ivpu_mmu_context_unmap_pages(ctx, vpu_addr, size); + ivpu_mmu_context_flush_page_tables(ctx, vpu_addr, size); + vpu_addr += size; + } + + mutex_unlock(&ctx->lock); + + ret = ivpu_mmu_invalidate_tlb(vdev, ctx->id); + if (ret) + ivpu_warn(vdev, "Failed to invalidate TLB for ctx %u: %d\n", ctx->id, ret); +} + +int +ivpu_mmu_context_insert_node_locked(struct ivpu_mmu_context *ctx, + const struct ivpu_addr_range *range, + u64 size, struct drm_mm_node *node) +{ + lockdep_assert_held(&ctx->lock); + + if (!ivpu_disable_mmu_cont_pages && size >= IVPU_MMU_CONT_PAGES_SIZE) { + if (!drm_mm_insert_node_in_range(&ctx->mm, node, size, IVPU_MMU_CONT_PAGES_SIZE, 0, + range->start, range->end, DRM_MM_INSERT_BEST)) + return 0; + } + + return drm_mm_insert_node_in_range(&ctx->mm, node, size, IVPU_MMU_PAGE_SIZE, 0, + range->start, range->end, DRM_MM_INSERT_BEST); +} + +void +ivpu_mmu_context_remove_node_locked(struct ivpu_mmu_context *ctx, struct drm_mm_node *node) +{ + lockdep_assert_held(&ctx->lock); + + drm_mm_remove_node(node); +} + +static int +ivpu_mmu_context_init(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx, u32 context_id) +{ + u64 start, end; + int ret; + + mutex_init(&ctx->lock); + INIT_LIST_HEAD(&ctx->bo_list); + + ret = ivpu_mmu_pgtable_init(vdev, &ctx->pgtable); + if (ret) + return ret; + + if (!context_id) { + start = vdev->hw->ranges.global.start; + end = vdev->hw->ranges.shave.end; + } else { + start = vdev->hw->ranges.user.start; + end = vdev->hw->ranges.dma.end; + } + + drm_mm_init(&ctx->mm, start, end - start); + ctx->id = context_id; + + return 0; +} + +static void ivpu_mmu_context_fini(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx) +{ + if (drm_WARN_ON(&vdev->drm, !ctx->pgtable.pgd_dma_ptr)) + return; + + mutex_destroy(&ctx->lock); + ivpu_mmu_pgtables_free(vdev, &ctx->pgtable); + drm_mm_takedown(&ctx->mm); + + ctx->pgtable.pgd_dma_ptr = NULL; + ctx->pgtable.pgd_dma = 0; +} + +int ivpu_mmu_global_context_init(struct ivpu_device *vdev) +{ + return ivpu_mmu_context_init(vdev, &vdev->gctx, IVPU_GLOBAL_CONTEXT_MMU_SSID); +} + +void ivpu_mmu_global_context_fini(struct ivpu_device *vdev) +{ + return ivpu_mmu_context_fini(vdev, &vdev->gctx); +} + +void ivpu_mmu_user_context_mark_invalid(struct ivpu_device *vdev, u32 ssid) +{ + struct ivpu_file_priv *file_priv; + + xa_lock(&vdev->context_xa); + + file_priv = xa_load(&vdev->context_xa, ssid); + if (file_priv) + file_priv->has_mmu_faults = true; + + xa_unlock(&vdev->context_xa); +} + +int ivpu_mmu_user_context_init(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx, u32 ctx_id) +{ + int ret; + + drm_WARN_ON(&vdev->drm, !ctx_id); + + ret = ivpu_mmu_context_init(vdev, ctx, ctx_id); + if (ret) { + ivpu_err(vdev, "Failed to initialize context: %d\n", ret); + return ret; + } + + ret = ivpu_mmu_set_pgtable(vdev, ctx_id, &ctx->pgtable); + if (ret) { + ivpu_err(vdev, "Failed to set page table: %d\n", ret); + goto err_context_fini; + } + + return 0; + +err_context_fini: + ivpu_mmu_context_fini(vdev, ctx); + return ret; +} + +void ivpu_mmu_user_context_fini(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx) +{ + drm_WARN_ON(&vdev->drm, !ctx->id); + + ivpu_mmu_clear_pgtable(vdev, ctx->id); + ivpu_mmu_context_fini(vdev, ctx); +} |