Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 2463 insertions, 0 deletions

diff --git a/drivers/misc/habanalabs/common/mmu/Makefile b/drivers/misc/habanalabs/common/mmu/Makefile
new file mode 100644
index 000000000..1806c524e
--- /dev/null
+++ b/drivers/misc/habanalabs/common/mmu/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+HL_COMMON_MMU_FILES := common/mmu/mmu.o common/mmu/mmu_v1.o \
+			common/mmu/mmu_v2_hr.o
diff --git a/drivers/misc/habanalabs/common/mmu/mmu.c b/drivers/misc/habanalabs/common/mmu/mmu.c
new file mode 100644
index 000000000..cf8946266
--- /dev/null
+++ b/drivers/misc/habanalabs/common/mmu/mmu.c
@@ -0,0 +1,1246 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright 2016-2022 HabanaLabs, Ltd.
+ * All Rights Reserved.
+ */
+
+#include <linux/slab.h>
+
+#include "../habanalabs.h"
+
+#include <trace/events/habanalabs.h>
+
+/**
+ * hl_mmu_get_funcs() - get MMU functions structure
+ * @hdev: habanalabs device structure.
+ * @pgt_residency: page table residency.
+ * @is_dram_addr: true if we need HMMU functions
+ *
+ * @return appropriate MMU functions structure
+ */
+static struct hl_mmu_funcs *hl_mmu_get_funcs(struct hl_device *hdev, int pgt_residency,
+									bool is_dram_addr)
+{
+	return &hdev->mmu_func[pgt_residency];
+}
+
+bool hl_is_dram_va(struct hl_device *hdev, u64 virt_addr)
+{
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+
+	return hl_mem_area_inside_range(virt_addr, prop->dmmu.page_size,
+					prop->dmmu.start_addr,
+					prop->dmmu.end_addr);
+}
+
+/**
+ * hl_mmu_init() - initialize the MMU module.
+ * @hdev: habanalabs device structure.
+ *
+ * Return: 0 for success, non-zero for failure.
+ */
+int hl_mmu_init(struct hl_device *hdev)
+{
+	int rc = -EOPNOTSUPP;
+
+	if (!hdev->mmu_enable)
+		return 0;
+
+	mutex_init(&hdev->mmu_lock);
+
+	if (hdev->mmu_func[MMU_DR_PGT].init != NULL) {
+		rc = hdev->mmu_func[MMU_DR_PGT].init(hdev);
+		if (rc)
+			return rc;
+	}
+
+	if (hdev->mmu_func[MMU_HR_PGT].init != NULL) {
+		rc = hdev->mmu_func[MMU_HR_PGT].init(hdev);
+		if (rc)
+			goto fini_dr_mmu;
+	}
+
+	return 0;
+
+fini_dr_mmu:
+	if (hdev->mmu_func[MMU_DR_PGT].fini != NULL)
+		hdev->mmu_func[MMU_DR_PGT].fini(hdev);
+
+	return rc;
+}
+
+/**
+ * hl_mmu_fini() - release the MMU module.
+ * @hdev: habanalabs device structure.
+ *
+ * This function does the following:
+ * - Disable MMU in H/W.
+ * - Free the pgt_infos pool.
+ *
+ * All contexts should be freed before calling this function.
+ */
+void hl_mmu_fini(struct hl_device *hdev)
+{
+	if (!hdev->mmu_enable)
+		return;
+
+	if (hdev->mmu_func[MMU_DR_PGT].fini != NULL)
+		hdev->mmu_func[MMU_DR_PGT].fini(hdev);
+
+	if (hdev->mmu_func[MMU_HR_PGT].fini != NULL)
+		hdev->mmu_func[MMU_HR_PGT].fini(hdev);
+
+	mutex_destroy(&hdev->mmu_lock);
+}
+
+/**
+ * hl_mmu_ctx_init() - initialize a context for using the MMU module.
+ * @ctx: pointer to the context structure to initialize.
+ *
+ * Initialize a mutex to protect the concurrent mapping flow, a hash to hold all
+ * page tables hops related to this context.
+ * Return: 0 on success, non-zero otherwise.
+ */
+int hl_mmu_ctx_init(struct hl_ctx *ctx)
+{
+	struct hl_device *hdev = ctx->hdev;
+	int rc = -EOPNOTSUPP;
+
+	if (!hdev->mmu_enable)
+		return 0;
+
+	if (hdev->mmu_func[MMU_DR_PGT].ctx_init != NULL) {
+		rc = hdev->mmu_func[MMU_DR_PGT].ctx_init(ctx);
+		if (rc)
+			return rc;
+	}
+
+	if (hdev->mmu_func[MMU_HR_PGT].ctx_init != NULL) {
+		rc = hdev->mmu_func[MMU_HR_PGT].ctx_init(ctx);
+		if (rc)
+			goto fini_dr_ctx;
+	}
+
+	return 0;
+
+fini_dr_ctx:
+	if (hdev->mmu_func[MMU_DR_PGT].fini != NULL)
+		hdev->mmu_func[MMU_DR_PGT].fini(hdev);
+
+	return rc;
+}
+
+/*
+ * hl_mmu_ctx_fini - disable a ctx from using the mmu module
+ *
+ * @ctx: pointer to the context structure
+ *
+ * This function does the following:
+ * - Free any pgts which were not freed yet
+ * - Free the mutex
+ * - Free DRAM default page mapping hops
+ */
+void hl_mmu_ctx_fini(struct hl_ctx *ctx)
+{
+	struct hl_device *hdev = ctx->hdev;
+
+	if (!hdev->mmu_enable)
+		return;
+
+	if (hdev->mmu_func[MMU_DR_PGT].ctx_fini != NULL)
+		hdev->mmu_func[MMU_DR_PGT].ctx_fini(ctx);
+
+	if (hdev->mmu_func[MMU_HR_PGT].ctx_fini != NULL)
+		hdev->mmu_func[MMU_HR_PGT].ctx_fini(ctx);
+}
+
+/*
+ * hl_mmu_get_real_page_size - get real page size to use in map/unmap operation
+ *
+ * @hdev: pointer to device data.
+ * @mmu_prop: MMU properties.
+ * @page_size: page size
+ * @real_page_size: set here the actual page size to use for the operation
+ * @is_dram_addr: true if DRAM address, otherwise false.
+ *
+ * @return 0 on success, otherwise non 0 error code
+ *
+ * note that this is general implementation that can fit most MMU arch. but as this is used as an
+ * MMU function:
+ * 1. it shall not be called directly- only from mmu_func structure instance
+ * 2. each MMU may modify the implementation internally
+ */
+int hl_mmu_get_real_page_size(struct hl_device *hdev, struct hl_mmu_properties *mmu_prop,
+				u32 page_size, u32 *real_page_size, bool is_dram_addr)
+{
+	/*
+	 * The H/W handles mapping of specific page sizes. Hence if the page
+	 * size is bigger, we break it to sub-pages and map them separately.
+	 */
+	if ((page_size % mmu_prop->page_size) == 0) {
+		*real_page_size = mmu_prop->page_size;
+		return 0;
+	}
+
+	dev_err(hdev->dev, "page size of %u is not %uKB aligned, can't map\n",
+						page_size, mmu_prop->page_size >> 10);
+
+	return -EFAULT;
+}
+
+static struct hl_mmu_properties *hl_mmu_get_prop(struct hl_device *hdev, u32 page_size,
+							bool is_dram_addr)
+{
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+
+	if (is_dram_addr)
+		return &prop->dmmu;
+	else if ((page_size % prop->pmmu_huge.page_size) == 0)
+		return &prop->pmmu_huge;
+
+	return &prop->pmmu;
+}
+
+/*
+ * hl_mmu_unmap_page - unmaps a virtual addr
+ *
+ * @ctx: pointer to the context structure
+ * @virt_addr: virt addr to map from
+ * @page_size: size of the page to unmap
+ * @flush_pte: whether to do a PCI flush
+ *
+ * This function does the following:
+ * - Check that the virt addr is mapped
+ * - Unmap the virt addr and frees pgts if possible
+ * - Returns 0 on success, -EINVAL if the given addr is not mapped
+ *
+ * Because this function changes the page tables in the device and because it
+ * changes the MMU hash, it must be protected by a lock.
+ * However, because it maps only a single page, the lock should be implemented
+ * in a higher level in order to protect the entire mapping of the memory area
+ *
+ * For optimization reasons PCI flush may be requested once after unmapping of
+ * large area.
+ */
+int hl_mmu_unmap_page(struct hl_ctx *ctx, u64 virt_addr, u32 page_size, bool flush_pte)
+{
+	struct hl_device *hdev = ctx->hdev;
+	struct hl_mmu_properties *mmu_prop;
+	struct hl_mmu_funcs *mmu_funcs;
+	int i, pgt_residency, rc = 0;
+	u32 real_page_size, npages;
+	u64 real_virt_addr;
+	bool is_dram_addr;
+
+	if (!hdev->mmu_enable)
+		return 0;
+
+	is_dram_addr = hl_is_dram_va(hdev, virt_addr);
+	mmu_prop = hl_mmu_get_prop(hdev, page_size, is_dram_addr);
+
+	pgt_residency = mmu_prop->host_resident ? MMU_HR_PGT : MMU_DR_PGT;
+	mmu_funcs = hl_mmu_get_funcs(hdev, pgt_residency, is_dram_addr);
+
+	rc = hdev->asic_funcs->mmu_get_real_page_size(hdev, mmu_prop, page_size, &real_page_size,
+							is_dram_addr);
+	if (rc)
+		return rc;
+
+	npages = page_size / real_page_size;
+	real_virt_addr = virt_addr;
+
+	for (i = 0 ; i < npages ; i++) {
+		rc = mmu_funcs->unmap(ctx, real_virt_addr, is_dram_addr);
+		if (rc)
+			break;
+
+		real_virt_addr += real_page_size;
+	}
+
+	if (flush_pte)
+		mmu_funcs->flush(ctx);
+
+	if (trace_habanalabs_mmu_unmap_enabled() && !rc)
+		trace_habanalabs_mmu_unmap(hdev->dev, virt_addr, 0, page_size, flush_pte);
+
+	return rc;
+}
+
+/*
+ * hl_mmu_map_page - maps a virtual addr to physical addr
+ *
+ * @ctx: pointer to the context structure
+ * @virt_addr: virt addr to map from
+ * @phys_addr: phys addr to map to
+ * @page_size: physical page size
+ * @flush_pte: whether to do a PCI flush
+ *
+ * This function does the following:
+ * - Check that the virt addr is not mapped
+ * - Allocate pgts as necessary in order to map the virt addr to the phys
+ * - Returns 0 on success, -EINVAL if addr is already mapped, or -ENOMEM.
+ *
+ * Because this function changes the page tables in the device and because it
+ * changes the MMU hash, it must be protected by a lock.
+ * However, because it maps only a single page, the lock should be implemented
+ * in a higher level in order to protect the entire mapping of the memory area
+ *
+ * For optimization reasons PCI flush may be requested once after mapping of
+ * large area.
+ */
+int hl_mmu_map_page(struct hl_ctx *ctx, u64 virt_addr, u64 phys_addr, u32 page_size,
+			bool flush_pte)
+{
+	int i, rc, pgt_residency, mapped_cnt = 0;
+	struct hl_device *hdev = ctx->hdev;
+	struct hl_mmu_properties *mmu_prop;
+	u64 real_virt_addr, real_phys_addr;
+	struct hl_mmu_funcs *mmu_funcs;
+	u32 real_page_size, npages;
+	bool is_dram_addr;
+
+
+	if (!hdev->mmu_enable)
+		return 0;
+
+	is_dram_addr = hl_is_dram_va(hdev, virt_addr);
+	mmu_prop = hl_mmu_get_prop(hdev, page_size, is_dram_addr);
+
+	pgt_residency = mmu_prop->host_resident ? MMU_HR_PGT : MMU_DR_PGT;
+	mmu_funcs = hl_mmu_get_funcs(hdev, pgt_residency, is_dram_addr);
+
+	rc = hdev->asic_funcs->mmu_get_real_page_size(hdev, mmu_prop, page_size, &real_page_size,
+							is_dram_addr);
+	if (rc)
+		return rc;
+
+	/*
+	 * Verify that the phys and virt addresses are aligned with the
+	 * MMU page size (in dram this means checking the address and MMU
+	 * after scrambling)
+	 */
+	if ((is_dram_addr &&
+			((hdev->asic_funcs->scramble_addr(hdev, phys_addr) &
+				(mmu_prop->page_size - 1)) ||
+			(hdev->asic_funcs->scramble_addr(hdev, virt_addr) &
+				(mmu_prop->page_size - 1)))) ||
+		(!is_dram_addr && ((phys_addr & (real_page_size - 1)) ||
+				(virt_addr & (real_page_size - 1)))))
+		dev_crit(hdev->dev,
+			"Mapping address 0x%llx with virtual address 0x%llx and page size of 0x%x is erroneous! Addresses must be divisible by page size",
+			phys_addr, virt_addr, real_page_size);
+
+	npages = page_size / real_page_size;
+	real_virt_addr = virt_addr;
+	real_phys_addr = phys_addr;
+
+	for (i = 0 ; i < npages ; i++) {
+		rc = mmu_funcs->map(ctx, real_virt_addr, real_phys_addr, real_page_size,
+										is_dram_addr);
+		if (rc)
+			goto err;
+
+		real_virt_addr += real_page_size;
+		real_phys_addr += real_page_size;
+		mapped_cnt++;
+	}
+
+	if (flush_pte)
+		mmu_funcs->flush(ctx);
+
+	trace_habanalabs_mmu_map(hdev->dev, virt_addr, phys_addr, page_size, flush_pte);
+
+	return 0;
+
+err:
+	real_virt_addr = virt_addr;
+	for (i = 0 ; i < mapped_cnt ; i++) {
+		if (mmu_funcs->unmap(ctx, real_virt_addr, is_dram_addr))
+			dev_warn_ratelimited(hdev->dev,
+				"failed to unmap va: 0x%llx\n", real_virt_addr);
+
+		real_virt_addr += real_page_size;
+	}
+
+	mmu_funcs->flush(ctx);
+
+	return rc;
+}
+
+/*
+ * hl_mmu_map_contiguous - implements a wrapper for hl_mmu_map_page
+ *                         for mapping contiguous physical memory
+ *
+ * @ctx: pointer to the context structure
+ * @virt_addr: virt addr to map from
+ * @phys_addr: phys addr to map to
+ * @size: size to map
+ *
+ */
+int hl_mmu_map_contiguous(struct hl_ctx *ctx, u64 virt_addr,
+					u64 phys_addr, u32 size)
+{
+	struct hl_device *hdev = ctx->hdev;
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	u64 curr_va, curr_pa;
+	u32 page_size;
+	bool flush_pte;
+	int rc = 0, off;
+
+	if (hl_mem_area_inside_range(virt_addr, size,
+			prop->dmmu.start_addr, prop->dmmu.end_addr))
+		page_size = prop->dmmu.page_size;
+	else if (hl_mem_area_inside_range(virt_addr, size,
+			prop->pmmu.start_addr, prop->pmmu.end_addr))
+		page_size = prop->pmmu.page_size;
+	else if (hl_mem_area_inside_range(virt_addr, size,
+			prop->pmmu_huge.start_addr, prop->pmmu_huge.end_addr))
+		page_size = prop->pmmu_huge.page_size;
+	else
+		return -EINVAL;
+
+	for (off = 0 ; off < size ; off += page_size) {
+		curr_va = virt_addr + off;
+		curr_pa = phys_addr + off;
+		flush_pte = (off + page_size) >= size;
+		rc = hl_mmu_map_page(ctx, curr_va, curr_pa, page_size,
+								flush_pte);
+		if (rc) {
+			dev_err(hdev->dev,
+				"Map failed for va 0x%llx to pa 0x%llx\n",
+				curr_va, curr_pa);
+			/* last mapping failed so don't try to unmap it - reduce off by page_size */
+			off -= page_size;
+			goto unmap;
+		}
+	}
+
+	return rc;
+
+unmap:
+	for (; off >= 0 ; off -= page_size) {
+		curr_va = virt_addr + off;
+		flush_pte = (off - (s32) page_size) < 0;
+		if (hl_mmu_unmap_page(ctx, curr_va, page_size, flush_pte))
+			dev_warn_ratelimited(hdev->dev,
+				"failed to unmap va 0x%llx\n", curr_va);
+	}
+
+	return rc;
+}
+
+/*
+ * hl_mmu_unmap_contiguous - implements a wrapper for hl_mmu_unmap_page
+ *                           for unmapping contiguous physical memory
+ *
+ * @ctx: pointer to the context structure
+ * @virt_addr: virt addr to unmap
+ * @size: size to unmap
+ *
+ */
+int hl_mmu_unmap_contiguous(struct hl_ctx *ctx, u64 virt_addr, u32 size)
+{
+	struct hl_device *hdev = ctx->hdev;
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	u64 curr_va;
+	u32 page_size;
+	bool flush_pte;
+	int rc = 0, off;
+
+	if (hl_mem_area_inside_range(virt_addr, size,
+			prop->dmmu.start_addr, prop->dmmu.end_addr))
+		page_size = prop->dmmu.page_size;
+	else if (hl_mem_area_inside_range(virt_addr, size,
+			prop->pmmu.start_addr, prop->pmmu.end_addr))
+		page_size = prop->pmmu.page_size;
+	else if (hl_mem_area_inside_range(virt_addr, size,
+			prop->pmmu_huge.start_addr, prop->pmmu_huge.end_addr))
+		page_size = prop->pmmu_huge.page_size;
+	else
+		return -EINVAL;
+
+	for (off = 0 ; off < size ; off += page_size) {
+		curr_va = virt_addr + off;
+		flush_pte = (off + page_size) >= size;
+		rc = hl_mmu_unmap_page(ctx, curr_va, page_size, flush_pte);
+		if (rc)
+			dev_warn_ratelimited(hdev->dev,
+				"Unmap failed for va 0x%llx\n", curr_va);
+	}
+
+	return rc;
+}
+
+/*
+ * hl_mmu_swap_out - marks all mapping of the given ctx as swapped out
+ *
+ * @ctx: pointer to the context structure
+ *
+ */
+void hl_mmu_swap_out(struct hl_ctx *ctx)
+{
+	struct hl_device *hdev = ctx->hdev;
+
+	if (!hdev->mmu_enable)
+		return;
+
+	if (hdev->mmu_func[MMU_DR_PGT].swap_out != NULL)
+		hdev->mmu_func[MMU_DR_PGT].swap_out(ctx);
+
+	if (hdev->mmu_func[MMU_HR_PGT].swap_out != NULL)
+		hdev->mmu_func[MMU_HR_PGT].swap_out(ctx);
+}
+
+/*
+ * hl_mmu_swap_in - marks all mapping of the given ctx as swapped in
+ *
+ * @ctx: pointer to the context structure
+ *
+ */
+void hl_mmu_swap_in(struct hl_ctx *ctx)
+{
+	struct hl_device *hdev = ctx->hdev;
+
+	if (!hdev->mmu_enable)
+		return;
+
+	if (hdev->mmu_func[MMU_DR_PGT].swap_in != NULL)
+		hdev->mmu_func[MMU_DR_PGT].swap_in(ctx);
+
+	if (hdev->mmu_func[MMU_HR_PGT].swap_in != NULL)
+		hdev->mmu_func[MMU_HR_PGT].swap_in(ctx);
+}
+
+static void hl_mmu_pa_page_with_offset(struct hl_ctx *ctx, u64 virt_addr,
+						struct hl_mmu_hop_info *hops,
+						u64 *phys_addr)
+{
+	struct asic_fixed_properties *prop = &ctx->hdev->asic_prop;
+	u64 offset_mask, addr_mask, hop_shift, tmp_phys_addr;
+	struct hl_mmu_properties *mmu_prop;
+
+	/* last hop holds the phys address and flags */
+	if (hops->unscrambled_paddr)
+		tmp_phys_addr = hops->unscrambled_paddr;
+	else
+		tmp_phys_addr = hops->hop_info[hops->used_hops - 1].hop_pte_val;
+
+	if (hops->range_type == HL_VA_RANGE_TYPE_HOST_HUGE)
+		mmu_prop = &prop->pmmu_huge;
+	else if (hops->range_type == HL_VA_RANGE_TYPE_HOST)
+		mmu_prop = &prop->pmmu;
+	else /* HL_VA_RANGE_TYPE_DRAM */
+		mmu_prop = &prop->dmmu;
+
+	if ((hops->range_type == HL_VA_RANGE_TYPE_DRAM) &&
+			!is_power_of_2(prop->dram_page_size)) {
+		u64 dram_page_size, dram_base, abs_phys_addr, abs_virt_addr,
+			page_id, page_start;
+		u32 page_off;
+
+		/*
+		 * Bit arithmetics cannot be used for non power of two page
+		 * sizes. In addition, since bit arithmetics is not used,
+		 * we cannot ignore dram base. All that shall be considered.
+		 */
+
+		dram_page_size = prop->dram_page_size;
+		dram_base = prop->dram_base_address;
+		abs_phys_addr = tmp_phys_addr - dram_base;
+		abs_virt_addr = virt_addr - dram_base;
+		page_id = DIV_ROUND_DOWN_ULL(abs_phys_addr, dram_page_size);
+		page_start = page_id * dram_page_size;
+		div_u64_rem(abs_virt_addr, dram_page_size, &page_off);
+
+		*phys_addr = page_start + page_off + dram_base;
+	} else {
+		/*
+		 * find the correct hop shift field in hl_mmu_properties
+		 * structure in order to determine the right masks
+		 * for the page offset.
+		 */
+		hop_shift = mmu_prop->hop_shifts[hops->used_hops - 1];
+		offset_mask = (1ull << hop_shift) - 1;
+		addr_mask = ~(offset_mask);
+		*phys_addr = (tmp_phys_addr & addr_mask) |
+				(virt_addr & offset_mask);
+	}
+}
+
+int hl_mmu_va_to_pa(struct hl_ctx *ctx, u64 virt_addr, u64 *phys_addr)
+{
+	struct hl_mmu_hop_info hops;
+	int rc;
+
+	memset(&hops, 0, sizeof(hops));
+
+	rc = hl_mmu_get_tlb_info(ctx, virt_addr, &hops);
+	if (rc)
+		return rc;
+
+	hl_mmu_pa_page_with_offset(ctx, virt_addr, &hops,  phys_addr);
+
+	return 0;
+}
+
+int hl_mmu_get_tlb_info(struct hl_ctx *ctx, u64 virt_addr,
+			struct hl_mmu_hop_info *hops)
+{
+	struct hl_device *hdev = ctx->hdev;
+	struct asic_fixed_properties *prop;
+	struct hl_mmu_properties *mmu_prop;
+	struct hl_mmu_funcs *mmu_funcs;
+	int pgt_residency, rc;
+	bool is_dram_addr;
+
+	if (!hdev->mmu_enable)
+		return -EOPNOTSUPP;
+
+	prop = &hdev->asic_prop;
+	hops->scrambled_vaddr = virt_addr;      /* assume no scrambling */
+
+	is_dram_addr = hl_mem_area_inside_range(virt_addr, prop->dmmu.page_size,
+								prop->dmmu.start_addr,
+								prop->dmmu.end_addr);
+
+	/* host-residency is the same in PMMU and PMMU huge, no need to distinguish here */
+	mmu_prop = is_dram_addr ? &prop->dmmu : &prop->pmmu;
+	pgt_residency = mmu_prop->host_resident ? MMU_HR_PGT : MMU_DR_PGT;
+	mmu_funcs = hl_mmu_get_funcs(hdev, pgt_residency, is_dram_addr);
+
+	mutex_lock(&hdev->mmu_lock);
+	rc = mmu_funcs->get_tlb_info(ctx, virt_addr, hops);
+	mutex_unlock(&hdev->mmu_lock);
+
+	if (rc)
+		return rc;
+
+	/* add page offset to physical address */
+	if (hops->unscrambled_paddr)
+		hl_mmu_pa_page_with_offset(ctx, virt_addr, hops, &hops->unscrambled_paddr);
+
+	return 0;
+}
+
+int hl_mmu_if_set_funcs(struct hl_device *hdev)
+{
+	if (!hdev->mmu_enable)
+		return 0;
+
+	switch (hdev->asic_type) {
+	case ASIC_GOYA:
+	case ASIC_GAUDI:
+	case ASIC_GAUDI_SEC:
+		hl_mmu_v1_set_funcs(hdev, &hdev->mmu_func[MMU_DR_PGT]);
+		break;
+	case ASIC_GAUDI2:
+	case ASIC_GAUDI2_SEC:
+		/* MMUs in Gaudi2 are always host resident */
+		hl_mmu_v2_hr_set_funcs(hdev, &hdev->mmu_func[MMU_HR_PGT]);
+		break;
+	default:
+		dev_err(hdev->dev, "Unrecognized ASIC type %d\n",
+			hdev->asic_type);
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+/**
+ * hl_mmu_scramble_addr() - The generic mmu address scrambling routine.
+ * @hdev: pointer to device data.
+ * @addr: The address to scramble.
+ *
+ * Return: The scrambled address.
+ */
+u64 hl_mmu_scramble_addr(struct hl_device *hdev, u64 addr)
+{
+	return addr;
+}
+
+/**
+ * hl_mmu_descramble_addr() - The generic mmu address descrambling
+ * routine.
+ * @hdev: pointer to device data.
+ * @addr: The address to descramble.
+ *
+ * Return: The un-scrambled address.
+ */
+u64 hl_mmu_descramble_addr(struct hl_device *hdev, u64 addr)
+{
+	return addr;
+}
+
+int hl_mmu_invalidate_cache(struct hl_device *hdev, bool is_hard, u32 flags)
+{
+	int rc;
+
+	rc = hdev->asic_funcs->mmu_invalidate_cache(hdev, is_hard, flags);
+	if (rc)
+		dev_err_ratelimited(hdev->dev, "MMU cache invalidation failed\n");
+
+	return rc;
+}
+
+int hl_mmu_invalidate_cache_range(struct hl_device *hdev, bool is_hard,
+					u32 flags, u32 asid, u64 va, u64 size)
+{
+	int rc;
+
+	rc = hdev->asic_funcs->mmu_invalidate_cache_range(hdev, is_hard, flags,
+								asid, va, size);
+	if (rc)
+		dev_err_ratelimited(hdev->dev, "MMU cache range invalidation failed\n");
+
+	return rc;
+}
+
+static void hl_mmu_prefetch_work_function(struct work_struct *work)
+{
+	struct hl_prefetch_work *pfw = container_of(work, struct hl_prefetch_work, pf_work);
+	struct hl_ctx *ctx = pfw->ctx;
+	struct hl_device *hdev = ctx->hdev;
+
+	if (!hl_device_operational(hdev, NULL))
+		goto put_ctx;
+
+	mutex_lock(&hdev->mmu_lock);
+
+	hdev->asic_funcs->mmu_prefetch_cache_range(ctx, pfw->flags, pfw->asid, pfw->va, pfw->size);
+
+	mutex_unlock(&hdev->mmu_lock);
+
+put_ctx:
+	/*
+	 * context was taken in the common mmu prefetch function- see comment there about
+	 * context handling.
+	 */
+	hl_ctx_put(ctx);
+	kfree(pfw);
+}
+
+int hl_mmu_prefetch_cache_range(struct hl_ctx *ctx, u32 flags, u32 asid, u64 va, u64 size)
+{
+	struct hl_prefetch_work *handle_pf_work;
+
+	handle_pf_work = kmalloc(sizeof(*handle_pf_work), GFP_KERNEL);
+	if (!handle_pf_work)
+		return -ENOMEM;
+
+	INIT_WORK(&handle_pf_work->pf_work, hl_mmu_prefetch_work_function);
+	handle_pf_work->ctx = ctx;
+	handle_pf_work->va = va;
+	handle_pf_work->size = size;
+	handle_pf_work->flags = flags;
+	handle_pf_work->asid = asid;
+
+	/*
+	 * as actual prefetch is done in a WQ we must get the context (and put it
+	 * at the end of the work function)
+	 */
+	hl_ctx_get(ctx);
+	queue_work(ctx->hdev->pf_wq, &handle_pf_work->pf_work);
+
+	return 0;
+}
+
+u64 hl_mmu_get_next_hop_addr(struct hl_ctx *ctx, u64 curr_pte)
+{
+	return (curr_pte & PAGE_PRESENT_MASK) ? (curr_pte & HOP_PHYS_ADDR_MASK) : ULLONG_MAX;
+}
+
+/**
+ * hl_mmu_get_hop_pte_phys_addr() - extract PTE address from HOP
+ * @ctx: pointer to the context structure to initialize.
+ * @mmu_prop: MMU properties.
+ * @hop_idx: HOP index.
+ * @hop_addr: HOP address.
+ * @virt_addr: virtual address fro the translation.
+ *
+ * @return the matching PTE value on success, otherwise U64_MAX.
+ */
+u64 hl_mmu_get_hop_pte_phys_addr(struct hl_ctx *ctx, struct hl_mmu_properties *mmu_prop,
+					u8 hop_idx, u64 hop_addr, u64 virt_addr)
+{
+	u64 mask, shift;
+
+	if (hop_idx >= mmu_prop->num_hops) {
+		dev_err_ratelimited(ctx->hdev->dev, "Invalid hop index %d\n", hop_idx);
+		return U64_MAX;
+	}
+
+	shift = mmu_prop->hop_shifts[hop_idx];
+	mask = mmu_prop->hop_masks[hop_idx];
+
+	return hop_addr + ctx->hdev->asic_prop.mmu_pte_size * ((virt_addr & mask) >> shift);
+}
+
+static void mmu_dma_mem_free_from_chunk(struct gen_pool *pool,
+					struct gen_pool_chunk *chunk,
+					void *data)
+{
+	struct hl_device *hdev = (struct hl_device *)data;
+
+	hl_asic_dma_free_coherent(hdev, (chunk->end_addr - chunk->start_addr) + 1,
+					(void *)chunk->start_addr, chunk->phys_addr);
+}
+
+void hl_mmu_hr_flush(struct hl_ctx *ctx)
+{
+	/* a flush operation requires memory barrier */
+	mb();
+}
+
+/**
+ * hl_mmu_hr_pool_destroy() - destroy genpool
+ * @hdev: habanalabs device structure.
+ * @hr_priv: MMU HR private data.
+ * @hop_table_size: HOP table size.
+ *
+ * This function does the following:
+ * - free entries allocated for shadow HOP0
+ * - free pool chunks
+ * - free pool
+ */
+static void hl_mmu_hr_pool_destroy(struct hl_device *hdev, struct hl_mmu_hr_priv *hr_priv,
+					u32 hop_table_size)
+{
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	struct gen_pool **pool = &hr_priv->mmu_pgt_pool;
+	struct pgt_info *hop0_pgt;
+	int asid;
+
+	if (ZERO_OR_NULL_PTR(*pool))
+		return;
+
+	/* Free the Fixed allocation of HOPs0 */
+	if (hr_priv->mmu_asid_hop0) {
+		for (asid = 0 ; asid < prop->max_asid ; asid++) {
+			hop0_pgt = &hr_priv->mmu_asid_hop0[asid];
+			if (ZERO_OR_NULL_PTR(hop0_pgt->virt_addr))
+				continue;
+
+			gen_pool_free(*pool, (uintptr_t) hop0_pgt->virt_addr, hop_table_size);
+		}
+	}
+
+	gen_pool_for_each_chunk(*pool, mmu_dma_mem_free_from_chunk, hdev);
+	gen_pool_destroy(*pool);
+
+	/* Make sure that if we arrive here again without init was called we
+	 * won't cause kernel panic. This can happen for example if we fail
+	 * during hard reset code at certain points
+	 */
+	*pool = NULL;
+}
+
+/**
+ * hl_mmu_hr_init() - initialize the MMU module.
+ * @hdev: habanalabs device structure.
+ * @hr_priv: MMU HR private data.
+ * @hop_table_size: HOP table size.
+ * @pgt_size: memory size allocated for the page table
+ *
+ * @return 0 on success otherwise non-zero error code
+ *
+ * This function does the following:
+ * - Create a pool of pages for pgt_infos.
+ * - Create a shadow table for pgt
+ */
+int hl_mmu_hr_init(struct hl_device *hdev, struct hl_mmu_hr_priv *hr_priv, u32 hop_table_size,
+			u64 pgt_size)
+{
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	size_t pool_chunk_size = SZ_4M;
+	struct pgt_info *hop0_pgt;
+	dma_addr_t dma_addr;
+	u64 virt_addr;
+	int i, rc;
+
+	/*
+	 * we set alloc size as PAGE_SIZE (sine dma_alloc_coherent allocation order/size is
+	 * PAGE_SHIFT/PAGE_SIZE) in order to be able to control the allocations alignment.
+	 * This way we can call "DMA alloc align" according to dma_alloc granularity and supply
+	 * allocations with higher-order alignment restrictions
+	 */
+	hr_priv->mmu_pgt_pool = gen_pool_create(PAGE_SHIFT, -1);
+	if (ZERO_OR_NULL_PTR(hr_priv->mmu_pgt_pool)) {
+		dev_err(hdev->dev, "Failed to create hr page pool\n");
+		return -ENOMEM;
+	}
+
+	hr_priv->mmu_asid_hop0 = kvcalloc(prop->max_asid, sizeof(struct pgt_info), GFP_KERNEL);
+	if (ZERO_OR_NULL_PTR(hr_priv->mmu_asid_hop0)) {
+		dev_err(hdev->dev, "Failed to allocate hr-mmu hop0 table\n");
+		rc = -ENOMEM;
+		goto destroy_mmu_pgt_pool;
+	}
+
+	for (i = 0 ; i < pgt_size ; i += pool_chunk_size) {
+		virt_addr = (uintptr_t) hl_asic_dma_alloc_coherent(hdev, pool_chunk_size,
+									&dma_addr,
+									GFP_KERNEL | __GFP_ZERO);
+		if (ZERO_OR_NULL_PTR(virt_addr)) {
+			dev_err(hdev->dev,
+				"Failed to allocate memory for host-resident page pool\n");
+			rc = -ENOMEM;
+			goto destroy_mmu_pgt_pool;
+		}
+
+		rc = gen_pool_add_virt(hr_priv->mmu_pgt_pool, virt_addr, (phys_addr_t) dma_addr,
+						pool_chunk_size, -1);
+		if (rc) {
+			dev_err(hdev->dev, "Failed to fill host-resident page pool\n");
+			goto destroy_mmu_pgt_pool;
+		}
+	}
+
+	for (i = 0 ; i < prop->max_asid ; i++) {
+		hop0_pgt = &hr_priv->mmu_asid_hop0[i];
+		hop0_pgt->virt_addr = (uintptr_t)
+					gen_pool_dma_zalloc_align(hr_priv->mmu_pgt_pool,
+								hop_table_size,
+								(dma_addr_t *) &hop0_pgt->phys_addr,
+								hop_table_size);
+		if (!hop0_pgt->virt_addr) {
+			dev_err(hdev->dev, "Failed to allocate HOP from pgt pool\n");
+			rc = -ENOMEM;
+			goto destroy_mmu_pgt_pool;
+		}
+	}
+
+	/* MMU H/W init will be done in device hw_init() */
+
+	return 0;
+
+destroy_mmu_pgt_pool:
+	hl_mmu_hr_pool_destroy(hdev, hr_priv, hop_table_size);
+	if (!ZERO_OR_NULL_PTR(hr_priv->mmu_asid_hop0))
+		kvfree(hr_priv->mmu_asid_hop0);
+
+	return rc;
+}
+
+/**
+ * hl_mmu_hr_fini() - release the MMU module.
+ * @hdev: habanalabs device structure.
+ * @hr_priv: MMU host resident private info.
+ * @hop_table_size: HOP table size
+ *
+ * This function does the following:
+ * - Disable MMU in H/W.
+ * - Free the pgt_infos pool.
+ *
+ * All contexts should be freed before calling this function.
+ */
+void hl_mmu_hr_fini(struct hl_device *hdev, struct hl_mmu_hr_priv *hr_priv, u32 hop_table_size)
+{
+	/* MMU H/W fini was already done in device hw_fini() */
+
+	hl_mmu_hr_pool_destroy(hdev, hr_priv, hop_table_size);
+
+	if (!ZERO_OR_NULL_PTR(hr_priv->mmu_asid_hop0)) {
+		kvfree(hr_priv->mmu_asid_hop0);
+
+		/* Make sure that if we arrive here again without init was
+		 * called we won't cause kernel panic. This can happen for
+		 * example if we fail during hard reset code at certain points
+		 */
+		hr_priv->mmu_asid_hop0 = NULL;
+	}
+}
+
+/**
+ * hl_mmu_hr_free_hop_remove_pgt() - free HOP and remove PGT from hash
+ * @pgt_info: page table info structure.
+ * @hr_priv: MMU HR private data.
+ * @hop_table_size: HOP table size.
+ */
+void hl_mmu_hr_free_hop_remove_pgt(struct pgt_info *pgt_info, struct hl_mmu_hr_priv *hr_priv,
+					u32 hop_table_size)
+{
+	gen_pool_free(hr_priv->mmu_pgt_pool, pgt_info->virt_addr, hop_table_size);
+	hash_del(&pgt_info->node);
+	kfree(pgt_info);
+}
+
+/**
+ * hl_mmu_hr_pte_phys_to_virt() - translate PTE phys addr to virt addr
+ * @ctx: pointer to the context structure
+ * @pgt: pgt_info for the HOP hosting the PTE
+ * @phys_pte_addr: phys address of the PTE
+ * @hop_table_size: HOP table size
+ *
+ * @return PTE virtual address
+ *
+ * The function use the pgt_info to get HOP base virt addr and obtain the PTE's virt addr
+ * by adding the PTE offset.
+ */
+u64 hl_mmu_hr_pte_phys_to_virt(struct hl_ctx *ctx, struct pgt_info *pgt,
+							u64 phys_pte_addr, u32 hop_table_size)
+{
+	u64 page_mask = (hop_table_size - 1);
+	u64 pte_offset = phys_pte_addr & page_mask;
+
+	return pgt->virt_addr + pte_offset;
+}
+
+/**
+ * hl_mmu_hr_write_pte() - write HR PTE
+ * @ctx: pointer to the context structure
+ * @pgt_info: HOP's page table info structure
+ * @phys_pte_addr: phys PTE address
+ * @val: raw PTE data
+ * @hop_table_size: HOP table size
+ */
+void hl_mmu_hr_write_pte(struct hl_ctx *ctx, struct pgt_info *pgt_info, u64 phys_pte_addr,
+								u64 val, u32 hop_table_size)
+{
+	/*
+	 * The value to write is the phys address of the next hop +
+	 * flags at the 12 LSBs.
+	 */
+	u64 virt_addr = hl_mmu_hr_pte_phys_to_virt(ctx, pgt_info, phys_pte_addr, hop_table_size);
+
+	*((u64 *) (uintptr_t) virt_addr) = val;
+}
+
+/**
+ * hl_mmu_hr_clear_pte() - clear HR PTE
+ * @ctx: pointer to the context structure
+ * @pgt_info: HOP's page table info structure
+ * @phys_pte_addr: phys PTE address
+ * @hop_table_size: HOP table size
+ */
+void hl_mmu_hr_clear_pte(struct hl_ctx *ctx, struct pgt_info *pgt_info, u64 phys_pte_addr,
+						u32 hop_table_size)
+{
+	/* no need to transform the value to physical address */
+	hl_mmu_hr_write_pte(ctx, pgt_info, phys_pte_addr, 0, hop_table_size);
+}
+
+/**
+ * hl_mmu_hr_put_pte() - put HR PTE and remove it if necessary (no more PTEs)
+ * @ctx: pointer to the context structure
+ * @pgt_info: HOP's page table info structure
+ * @hr_priv: HR MMU private info
+ * @hop_table_size: HOP table size
+ *
+ * @return number of PTEs still in the HOP
+ */
+int hl_mmu_hr_put_pte(struct hl_ctx *ctx, struct pgt_info *pgt_info,
+						struct hl_mmu_hr_priv *hr_priv,
+						u32 hop_table_size)
+{
+	int num_of_ptes_left;
+
+	pgt_info->num_of_ptes--;
+
+	/*
+	 * Need to save the number of ptes left because free_hop might free
+	 * the pgt_info
+	 */
+	num_of_ptes_left = pgt_info->num_of_ptes;
+	if (!num_of_ptes_left)
+		hl_mmu_hr_free_hop_remove_pgt(pgt_info, hr_priv, hop_table_size);
+
+	return num_of_ptes_left;
+}
+
+/**
+ * hl_mmu_hr_get_pte() - increase PGT PTE count
+ * @ctx: pointer to the context structure
+ * @hr_func: host resident functions
+ * @phys_hop_addr: HOP phys address
+ */
+void hl_mmu_hr_get_pte(struct hl_ctx *ctx, struct hl_hr_mmu_funcs *hr_func, u64 phys_hop_addr)
+{
+	hr_func->get_pgt_info(ctx, phys_hop_addr)->num_of_ptes++;
+}
+
+/**
+ * hl_mmu_hr_get_next_hop_pgt_info() - get pgt_info structure for the next HOP
+ * @ctx: pointer to the context structure.
+ * @hr_func: host resident functions.
+ * @curr_pte: current PTE value.
+ *
+ * @return pgt_info structure on success, otherwise NULL.
+ */
+struct pgt_info *hl_mmu_hr_get_next_hop_pgt_info(struct hl_ctx *ctx,
+							struct hl_hr_mmu_funcs *hr_func,
+							u64 curr_pte)
+{
+	u64 next_hop_phys_addr = hl_mmu_get_next_hop_addr(ctx, curr_pte);
+
+	if (next_hop_phys_addr == ULLONG_MAX)
+		return NULL;
+
+	return hr_func->get_pgt_info(ctx, next_hop_phys_addr);
+}
+
+/**
+ * hl_mmu_hr_alloc_hop() - allocate HOP
+ * @ctx: pointer to the context structure.
+ * @hr_priv: host resident private info structure.
+ * @hr_func: host resident functions.
+ * @mmu_prop: MMU properties.
+ *
+ * @return pgt_info structure associated with the allocated HOP on success, otherwise NULL.
+ */
+struct pgt_info *hl_mmu_hr_alloc_hop(struct hl_ctx *ctx, struct hl_mmu_hr_priv *hr_priv,
+							struct hl_hr_mmu_funcs *hr_func,
+							struct hl_mmu_properties *mmu_prop)
+{
+	struct hl_device *hdev = ctx->hdev;
+	struct pgt_info *pgt_info;
+	dma_addr_t phys_addr;
+	void *virt_addr;
+	int i, retry = 1;
+
+	pgt_info = kmalloc(sizeof(*pgt_info), GFP_KERNEL);
+	if (!pgt_info)
+		return NULL;
+
+	for (i = 0; i <= retry; i++) {
+		virt_addr = gen_pool_dma_zalloc_align(hr_priv->mmu_pgt_pool,
+							mmu_prop->hop_table_size,
+							&phys_addr,
+							mmu_prop->hop_table_size);
+		if (virt_addr)
+			break;
+
+		/* No memory in pool - get some and try again */
+		virt_addr = hl_asic_dma_alloc_coherent(hdev, SZ_2M, &phys_addr,
+							GFP_KERNEL | __GFP_ZERO);
+		if (ZERO_OR_NULL_PTR(virt_addr))
+			break;
+
+		if (gen_pool_add_virt(hr_priv->mmu_pgt_pool, (unsigned long)virt_addr,
+								phys_addr, SZ_2M, -1)) {
+			hl_asic_dma_free_coherent(hdev, SZ_2M, virt_addr, phys_addr);
+			virt_addr = NULL;
+			break;
+		}
+	}
+
+	if (ZERO_OR_NULL_PTR(virt_addr)) {
+		dev_err(hdev->dev, "failed to allocate page\n");
+		goto pool_alloc_err;
+	}
+
+	pgt_info->phys_addr = phys_addr;
+	pgt_info->shadow_addr = (unsigned long) NULL;
+	pgt_info->virt_addr = (unsigned long)virt_addr;
+	pgt_info->ctx = ctx;
+	pgt_info->num_of_ptes = 0;
+	hr_func->add_pgt_info(ctx, pgt_info, phys_addr);
+
+	return pgt_info;
+
+pool_alloc_err:
+	kfree(pgt_info);
+
+	return NULL;
+}
+
+/**
+ * hl_mmu_hr_get_alloc_next_hop() - get the next HOP, allocate it if it does not exist
+ * @ctx: pointer to the context structure.
+ * @hr_priv: host resident private info structure.
+ * @hr_func: host resident functions.
+ * @mmu_prop: MMU properties.
+ * @curr_pte: current PTE value.
+ * @is_new_hop: set to true if HOP is new (caller responsibility to set it to false).
+ *
+ * @return pgt_info structure associated with the allocated HOP on success, otherwise NULL.
+ */
+struct pgt_info *hl_mmu_hr_get_alloc_next_hop(struct hl_ctx *ctx,
+							struct hl_mmu_hr_priv *hr_priv,
+							struct hl_hr_mmu_funcs *hr_func,
+							struct hl_mmu_properties *mmu_prop,
+							u64 curr_pte, bool *is_new_hop)
+{
+	u64 hop_addr = hl_mmu_get_next_hop_addr(ctx, curr_pte);
+
+	if (hop_addr != ULLONG_MAX)
+		return hr_func->get_pgt_info(ctx, hop_addr);
+
+	*is_new_hop = true;
+	return hl_mmu_hr_alloc_hop(ctx, hr_priv, hr_func, mmu_prop);
+}
+
+/**
+ * hl_mmu_hr_get_tlb_info() - get the TLB info (info for a specific mapping)
+ * @ctx: pointer to the context structure.
+ * @virt_addr: the virt address for which to get info.
+ * @hops: HOPs info structure.
+ * @hr_func: host resident functions.
+ *
+ * @return 0 on success, otherwise non 0 error code..
+ */
+int hl_mmu_hr_get_tlb_info(struct hl_ctx *ctx, u64 virt_addr, struct hl_mmu_hop_info *hops,
+								struct hl_hr_mmu_funcs *hr_func)
+{
+	/* using 6 HOPs as this is the maximum number of HOPs */
+	struct pgt_info *hops_pgt_info[MMU_ARCH_6_HOPS] = { NULL };
+	struct hl_device *hdev = ctx->hdev;
+	struct hl_mmu_properties *mmu_prop;
+	int rc, i, used_hops;
+	bool is_huge;
+
+	rc = hr_func->get_tlb_mapping_params(hdev, &mmu_prop, hops, virt_addr, &is_huge);
+	if (rc)
+		return rc;
+
+	used_hops = mmu_prop->num_hops;
+
+	/* huge pages use one less hop */
+	if (is_huge)
+		used_hops--;
+
+	hops->scrambled_vaddr = hdev->asic_funcs->scramble_addr(hdev, virt_addr);
+
+	for (i = 0 ; i < used_hops ; i++) {
+		if (i == 0)
+			hops_pgt_info[i] = hr_func->get_hop0_pgt_info(ctx);
+		else
+			hops_pgt_info[i] = hl_mmu_hr_get_next_hop_pgt_info(ctx, hr_func,
+								hops->hop_info[i - 1].hop_pte_val);
+
+		if (!hops_pgt_info[i])
+			return -EFAULT;
+
+		hops->hop_info[i].hop_addr = hops_pgt_info[i]->phys_addr;
+		hops->hop_info[i].hop_pte_addr =
+				hl_mmu_get_hop_pte_phys_addr(ctx, mmu_prop, i,
+								hops->hop_info[i].hop_addr,
+								hops->scrambled_vaddr);
+		hops->hop_info[i].hop_pte_val = *(u64 *) (uintptr_t)
+						hl_mmu_hr_pte_phys_to_virt(ctx, hops_pgt_info[i],
+								hops->hop_info[i].hop_pte_addr,
+								mmu_prop->hop_table_size);
+
+		if (!(hops->hop_info[i].hop_pte_val & PAGE_PRESENT_MASK))
+			return -EFAULT;
+
+		if (hops->hop_info[i].hop_pte_val & mmu_prop->last_mask)
+			break;
+	}
+
+	/* if passed over all hops then no last hop was found */
+	if (i == mmu_prop->num_hops)
+		return -EFAULT;
+
+	if (hops->scrambled_vaddr != virt_addr)
+		hops->unscrambled_paddr = hdev->asic_funcs->descramble_addr
+				(hdev, hops->hop_info[i].hop_pte_val);
+	else
+		hops->unscrambled_paddr = hops->hop_info[i].hop_pte_val;
+
+	hops->used_hops = i + 1;
+
+	return 0;
+}
+
diff --git a/drivers/misc/habanalabs/common/mmu/mmu_v1.c b/drivers/misc/habanalabs/common/mmu/mmu_v1.c
new file mode 100644
index 000000000..8a40de4a4
--- /dev/null
+++ b/drivers/misc/habanalabs/common/mmu/mmu_v1.c
@@ -0,0 +1,815 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright 2016-2019 HabanaLabs, Ltd.
+ * All Rights Reserved.
+ */
+
+#include "../habanalabs.h"
+#include "../../include/hw_ip/mmu/mmu_general.h"
+
+#include <linux/slab.h>
+
+#define MMU_V1_MAX_HOPS	(MMU_HOP4 + 1)
+
+static inline u64 get_phys_addr(struct hl_ctx *ctx, u64 shadow_addr);
+
+static struct pgt_info *get_pgt_info(struct hl_ctx *ctx, u64 hop_addr)
+{
+	struct pgt_info *pgt_info = NULL;
+
+	hash_for_each_possible(ctx->mmu_shadow_hash, pgt_info, node,
+				(unsigned long) hop_addr)
+		if (hop_addr == pgt_info->shadow_addr)
+			break;
+
+	return pgt_info;
+}
+
+static void _free_hop(struct hl_ctx *ctx, struct pgt_info *pgt_info)
+{
+	struct hl_device *hdev = ctx->hdev;
+
+	gen_pool_free(hdev->mmu_priv.dr.mmu_pgt_pool, pgt_info->phys_addr,
+			hdev->asic_prop.mmu_hop_table_size);
+	hash_del(&pgt_info->node);
+	kfree((u64 *) (uintptr_t) pgt_info->shadow_addr);
+	kfree(pgt_info);
+}
+
+static void free_hop(struct hl_ctx *ctx, u64 hop_addr)
+{
+	struct pgt_info *pgt_info = get_pgt_info(ctx, hop_addr);
+
+	_free_hop(ctx, pgt_info);
+}
+
+static u64 alloc_hop(struct hl_ctx *ctx)
+{
+	struct hl_device *hdev = ctx->hdev;
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	struct pgt_info *pgt_info;
+	u64 phys_addr, shadow_addr;
+
+	pgt_info = kmalloc(sizeof(*pgt_info), GFP_KERNEL);
+	if (!pgt_info)
+		return ULLONG_MAX;
+
+	phys_addr = (u64) gen_pool_alloc(hdev->mmu_priv.dr.mmu_pgt_pool,
+					prop->mmu_hop_table_size);
+	if (!phys_addr) {
+		dev_err(hdev->dev, "failed to allocate page\n");
+		goto pool_add_err;
+	}
+
+	shadow_addr = (u64) (uintptr_t) kzalloc(prop->mmu_hop_table_size,
+						GFP_KERNEL);
+	if (!shadow_addr)
+		goto shadow_err;
+
+	pgt_info->phys_addr = phys_addr;
+	pgt_info->shadow_addr = shadow_addr;
+	pgt_info->ctx = ctx;
+	pgt_info->num_of_ptes = 0;
+	hash_add(ctx->mmu_shadow_hash, &pgt_info->node, shadow_addr);
+
+	return shadow_addr;
+
+shadow_err:
+	gen_pool_free(hdev->mmu_priv.dr.mmu_pgt_pool, phys_addr,
+			prop->mmu_hop_table_size);
+pool_add_err:
+	kfree(pgt_info);
+
+	return ULLONG_MAX;
+}
+
+static inline u64 get_phys_hop0_addr(struct hl_ctx *ctx)
+{
+	return ctx->hdev->asic_prop.mmu_pgt_addr +
+			(ctx->asid * ctx->hdev->asic_prop.mmu_hop_table_size);
+}
+
+static inline u64 get_hop0_addr(struct hl_ctx *ctx)
+{
+	return (u64) (uintptr_t) ctx->hdev->mmu_priv.dr.mmu_shadow_hop0 +
+			(ctx->asid * ctx->hdev->asic_prop.mmu_hop_table_size);
+}
+
+static void flush(struct hl_ctx *ctx)
+{
+	/* flush all writes from all cores to reach PCI */
+	mb();
+	ctx->hdev->asic_funcs->read_pte(ctx->hdev, get_phys_hop0_addr(ctx));
+}
+
+/* transform the value to physical address when writing to H/W */
+static inline void write_pte(struct hl_ctx *ctx, u64 shadow_pte_addr, u64 val)
+{
+	/*
+	 * The value to write is actually the address of the next shadow hop +
+	 * flags at the 12 LSBs.
+	 * Hence in order to get the value to write to the physical PTE, we
+	 * clear the 12 LSBs and translate the shadow hop to its associated
+	 * physical hop, and add back the original 12 LSBs.
+	 */
+	u64 phys_val = get_phys_addr(ctx, val & HOP_PHYS_ADDR_MASK) |
+				(val & FLAGS_MASK);
+
+	ctx->hdev->asic_funcs->write_pte(ctx->hdev,
+					get_phys_addr(ctx, shadow_pte_addr),
+					phys_val);
+
+	*(u64 *) (uintptr_t) shadow_pte_addr = val;
+}
+
+/* do not transform the value to physical address when writing to H/W */
+static inline void write_final_pte(struct hl_ctx *ctx, u64 shadow_pte_addr,
+					u64 val)
+{
+	ctx->hdev->asic_funcs->write_pte(ctx->hdev,
+					get_phys_addr(ctx, shadow_pte_addr),
+					val);
+	*(u64 *) (uintptr_t) shadow_pte_addr = val;
+}
+
+/* clear the last and present bits */
+static inline void clear_pte(struct hl_ctx *ctx, u64 pte_addr)
+{
+	/* no need to transform the value to physical address */
+	write_final_pte(ctx, pte_addr, 0);
+}
+
+static inline void get_pte(struct hl_ctx *ctx, u64 hop_addr)
+{
+	get_pgt_info(ctx, hop_addr)->num_of_ptes++;
+}
+
+/*
+ * put_pte - decrement the num of ptes and free the hop if possible
+ *
+ * @ctx: pointer to the context structure
+ * @hop_addr: addr of the hop
+ *
+ * This function returns the number of ptes left on this hop. If the number is
+ * 0, it means the pte was freed.
+ */
+static inline int put_pte(struct hl_ctx *ctx, u64 hop_addr)
+{
+	struct pgt_info *pgt_info = get_pgt_info(ctx, hop_addr);
+	int num_of_ptes_left;
+
+	pgt_info->num_of_ptes--;
+
+	/*
+	 * Need to save the number of ptes left because free_hop might free
+	 * the pgt_info
+	 */
+	num_of_ptes_left = pgt_info->num_of_ptes;
+	if (!num_of_ptes_left)
+		_free_hop(ctx, pgt_info);
+
+	return num_of_ptes_left;
+}
+
+static inline u64 get_hop_pte_addr(struct hl_ctx *ctx, struct hl_mmu_properties *mmu_prop,
+					u64 *hop_addr_arr, u64 virt_addr, enum mmu_hop_num hop_idx)
+{
+	u64 mask, shift;
+
+	mask = mmu_prop->hop_masks[hop_idx];
+	shift = mmu_prop->hop_shifts[hop_idx];
+	return hop_addr_arr[hop_idx] +
+			ctx->hdev->asic_prop.mmu_pte_size * ((virt_addr & mask) >> shift);
+}
+
+static inline u64 get_alloc_next_hop_addr(struct hl_ctx *ctx, u64 curr_pte,
+						bool *is_new_hop)
+{
+	u64 hop_addr = hl_mmu_get_next_hop_addr(ctx, curr_pte);
+
+	if (hop_addr == ULLONG_MAX) {
+		hop_addr = alloc_hop(ctx);
+		*is_new_hop = (hop_addr != ULLONG_MAX);
+	}
+
+	return hop_addr;
+}
+
+/* translates shadow address inside hop to a physical address */
+static inline u64 get_phys_addr(struct hl_ctx *ctx, u64 shadow_addr)
+{
+	u64 page_mask = (ctx->hdev->asic_prop.mmu_hop_table_size - 1);
+	u64 shadow_hop_addr = shadow_addr & ~page_mask;
+	u64 pte_offset = shadow_addr & page_mask;
+	u64 phys_hop_addr;
+
+	if (shadow_hop_addr != get_hop0_addr(ctx))
+		phys_hop_addr = get_pgt_info(ctx, shadow_hop_addr)->phys_addr;
+	else
+		phys_hop_addr = get_phys_hop0_addr(ctx);
+
+	return phys_hop_addr + pte_offset;
+}
+
+static int dram_default_mapping_init(struct hl_ctx *ctx)
+{
+	struct hl_device *hdev = ctx->hdev;
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	u64 num_of_hop3, total_hops, hop0_addr, hop1_addr, hop2_addr,
+		hop2_pte_addr, hop3_pte_addr, pte_val;
+	int rc, i, j, hop3_allocated = 0;
+
+	if ((!prop->dram_supports_virtual_memory) ||
+			(!hdev->dram_default_page_mapping) ||
+			(ctx->asid == HL_KERNEL_ASID_ID))
+		return 0;
+
+	num_of_hop3 = prop->dram_size_for_default_page_mapping;
+	do_div(num_of_hop3, prop->dram_page_size);
+	do_div(num_of_hop3, HOP_PTE_ENTRIES_512);
+
+	/* add hop1 and hop2 */
+	total_hops = num_of_hop3 + 2;
+
+	ctx->dram_default_hops = kzalloc(HL_PTE_SIZE * total_hops,  GFP_KERNEL);
+	if (!ctx->dram_default_hops)
+		return -ENOMEM;
+
+	hop0_addr = get_hop0_addr(ctx);
+
+	hop1_addr = alloc_hop(ctx);
+	if (hop1_addr == ULLONG_MAX) {
+		dev_err(hdev->dev, "failed to alloc hop 1\n");
+		rc = -ENOMEM;
+		goto hop1_err;
+	}
+
+	ctx->dram_default_hops[total_hops - 1] = hop1_addr;
+
+	hop2_addr = alloc_hop(ctx);
+	if (hop2_addr == ULLONG_MAX) {
+		dev_err(hdev->dev, "failed to alloc hop 2\n");
+		rc = -ENOMEM;
+		goto hop2_err;
+	}
+
+	ctx->dram_default_hops[total_hops - 2] = hop2_addr;
+
+	for (i = 0 ; i < num_of_hop3 ; i++) {
+		ctx->dram_default_hops[i] = alloc_hop(ctx);
+		if (ctx->dram_default_hops[i] == ULLONG_MAX) {
+			dev_err(hdev->dev, "failed to alloc hop 3, i: %d\n", i);
+			rc = -ENOMEM;
+			goto hop3_err;
+		}
+		hop3_allocated++;
+	}
+
+	/* need only pte 0 in hops 0 and 1 */
+	pte_val = (hop1_addr & HOP_PHYS_ADDR_MASK) | PAGE_PRESENT_MASK;
+	write_pte(ctx, hop0_addr, pte_val);
+
+	pte_val = (hop2_addr & HOP_PHYS_ADDR_MASK) | PAGE_PRESENT_MASK;
+	write_pte(ctx, hop1_addr, pte_val);
+	get_pte(ctx, hop1_addr);
+
+	hop2_pte_addr = hop2_addr;
+	for (i = 0 ; i < num_of_hop3 ; i++) {
+		pte_val = (ctx->dram_default_hops[i] & HOP_PHYS_ADDR_MASK) |
+				PAGE_PRESENT_MASK;
+		write_pte(ctx, hop2_pte_addr, pte_val);
+		get_pte(ctx, hop2_addr);
+		hop2_pte_addr += HL_PTE_SIZE;
+	}
+
+	pte_val = (prop->mmu_dram_default_page_addr & HOP_PHYS_ADDR_MASK) |
+			LAST_MASK | PAGE_PRESENT_MASK;
+
+	for (i = 0 ; i < num_of_hop3 ; i++) {
+		hop3_pte_addr = ctx->dram_default_hops[i];
+		for (j = 0 ; j < HOP_PTE_ENTRIES_512 ; j++) {
+			write_final_pte(ctx, hop3_pte_addr, pte_val);
+			get_pte(ctx, ctx->dram_default_hops[i]);
+			hop3_pte_addr += HL_PTE_SIZE;
+		}
+	}
+
+	flush(ctx);
+
+	return 0;
+
+hop3_err:
+	for (i = 0 ; i < hop3_allocated ; i++)
+		free_hop(ctx, ctx->dram_default_hops[i]);
+
+	free_hop(ctx, hop2_addr);
+hop2_err:
+	free_hop(ctx, hop1_addr);
+hop1_err:
+	kfree(ctx->dram_default_hops);
+
+	return rc;
+}
+
+static void dram_default_mapping_fini(struct hl_ctx *ctx)
+{
+	struct hl_device *hdev = ctx->hdev;
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	u64 num_of_hop3, total_hops, hop0_addr, hop1_addr, hop2_addr,
+		hop2_pte_addr, hop3_pte_addr;
+	int i, j;
+
+	if ((!prop->dram_supports_virtual_memory) ||
+			(!hdev->dram_default_page_mapping) ||
+			(ctx->asid == HL_KERNEL_ASID_ID))
+		return;
+
+	num_of_hop3 = prop->dram_size_for_default_page_mapping;
+	do_div(num_of_hop3, prop->dram_page_size);
+	do_div(num_of_hop3, HOP_PTE_ENTRIES_512);
+
+	hop0_addr = get_hop0_addr(ctx);
+	/* add hop1 and hop2 */
+	total_hops = num_of_hop3 + 2;
+	hop1_addr = ctx->dram_default_hops[total_hops - 1];
+	hop2_addr = ctx->dram_default_hops[total_hops - 2];
+
+	for (i = 0 ; i < num_of_hop3 ; i++) {
+		hop3_pte_addr = ctx->dram_default_hops[i];
+		for (j = 0 ; j < HOP_PTE_ENTRIES_512 ; j++) {
+			clear_pte(ctx, hop3_pte_addr);
+			put_pte(ctx, ctx->dram_default_hops[i]);
+			hop3_pte_addr += HL_PTE_SIZE;
+		}
+	}
+
+	hop2_pte_addr = hop2_addr;
+	hop2_pte_addr = hop2_addr;
+	for (i = 0 ; i < num_of_hop3 ; i++) {
+		clear_pte(ctx, hop2_pte_addr);
+		put_pte(ctx, hop2_addr);
+		hop2_pte_addr += HL_PTE_SIZE;
+	}
+
+	clear_pte(ctx, hop1_addr);
+	put_pte(ctx, hop1_addr);
+	clear_pte(ctx, hop0_addr);
+
+	kfree(ctx->dram_default_hops);
+
+	flush(ctx);
+}
+
+/**
+ * hl_mmu_v1_init() - initialize the MMU module.
+ * @hdev: habanalabs device structure.
+ *
+ * This function does the following:
+ * - Create a pool of pages for pgt_infos.
+ * - Create a shadow table for pgt
+ *
+ * Return: 0 for success, non-zero for failure.
+ */
+static int hl_mmu_v1_init(struct hl_device *hdev)
+{
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	int rc;
+
+	hdev->mmu_priv.dr.mmu_pgt_pool =
+			gen_pool_create(__ffs(prop->mmu_hop_table_size), -1);
+
+	if (!hdev->mmu_priv.dr.mmu_pgt_pool) {
+		dev_err(hdev->dev, "Failed to create page gen pool\n");
+		return -ENOMEM;
+	}
+
+	rc = gen_pool_add(hdev->mmu_priv.dr.mmu_pgt_pool, prop->mmu_pgt_addr +
+			prop->mmu_hop0_tables_total_size,
+			prop->mmu_pgt_size - prop->mmu_hop0_tables_total_size,
+			-1);
+	if (rc) {
+		dev_err(hdev->dev, "Failed to add memory to page gen pool\n");
+		goto err_pool_add;
+	}
+
+	hdev->mmu_priv.dr.mmu_shadow_hop0 = kvcalloc(prop->max_asid, prop->mmu_hop_table_size,
+										GFP_KERNEL);
+	if (ZERO_OR_NULL_PTR(hdev->mmu_priv.dr.mmu_shadow_hop0)) {
+		rc = -ENOMEM;
+		goto err_pool_add;
+	}
+
+	/* MMU H/W init will be done in device hw_init() */
+
+	return 0;
+
+err_pool_add:
+	gen_pool_destroy(hdev->mmu_priv.dr.mmu_pgt_pool);
+
+	return rc;
+}
+
+/**
+ * hl_mmu_v1_fini() - release the MMU module.
+ * @hdev: habanalabs device structure.
+ *
+ * This function does the following:
+ * - Disable MMU in H/W.
+ * - Free the pgt_infos pool.
+ *
+ * All contexts should be freed before calling this function.
+ */
+static void hl_mmu_v1_fini(struct hl_device *hdev)
+{
+	/* MMU H/W fini was already done in device hw_fini() */
+
+	if (!ZERO_OR_NULL_PTR(hdev->mmu_priv.dr.mmu_shadow_hop0)) {
+		kvfree(hdev->mmu_priv.dr.mmu_shadow_hop0);
+		gen_pool_destroy(hdev->mmu_priv.dr.mmu_pgt_pool);
+
+		/* Make sure that if we arrive here again without init was
+		 * called we won't cause kernel panic. This can happen for
+		 * example if we fail during hard reset code at certain points
+		 */
+		hdev->mmu_priv.dr.mmu_shadow_hop0 = NULL;
+	}
+}
+
+/**
+ * hl_mmu_v1_ctx_init() - initialize a context for using the MMU module.
+ * @ctx: pointer to the context structure to initialize.
+ *
+ * Initialize a mutex to protect the concurrent mapping flow, a hash to hold all
+ * page tables hops related to this context.
+ * Return: 0 on success, non-zero otherwise.
+ */
+static int hl_mmu_v1_ctx_init(struct hl_ctx *ctx)
+{
+	hash_init(ctx->mmu_shadow_hash);
+	return dram_default_mapping_init(ctx);
+}
+
+/*
+ * hl_mmu_ctx_fini - disable a ctx from using the mmu module
+ *
+ * @ctx: pointer to the context structure
+ *
+ * This function does the following:
+ * - Free any pgts which were not freed yet
+ * - Free the mutex
+ * - Free DRAM default page mapping hops
+ */
+static void hl_mmu_v1_ctx_fini(struct hl_ctx *ctx)
+{
+	struct hl_device *hdev = ctx->hdev;
+	struct pgt_info *pgt_info;
+	struct hlist_node *tmp;
+	int i;
+
+	dram_default_mapping_fini(ctx);
+
+	if (!hash_empty(ctx->mmu_shadow_hash))
+		dev_err(hdev->dev, "ctx %d is freed while it has pgts in use\n",
+			ctx->asid);
+
+	hash_for_each_safe(ctx->mmu_shadow_hash, i, tmp, pgt_info, node) {
+		dev_err_ratelimited(hdev->dev,
+			"pgt_info of addr 0x%llx of asid %d was not destroyed, num_ptes: %d\n",
+			pgt_info->phys_addr, ctx->asid, pgt_info->num_of_ptes);
+		_free_hop(ctx, pgt_info);
+	}
+}
+
+static int hl_mmu_v1_unmap(struct hl_ctx *ctx,
+				u64 virt_addr, bool is_dram_addr)
+{
+	u64 hop_addr[MMU_V1_MAX_HOPS] = {0}, hop_pte_addr[MMU_V1_MAX_HOPS] = {0}, curr_pte = 0;
+	struct hl_device *hdev = ctx->hdev;
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	struct hl_mmu_properties *mmu_prop;
+	bool is_huge, clear_hop3 = true;
+	int hop_idx;
+
+	/* shifts and masks are the same in PMMU and HPMMU, use one of them */
+	mmu_prop = is_dram_addr ? &prop->dmmu : &prop->pmmu;
+
+	for (hop_idx = MMU_HOP0; hop_idx < MMU_HOP4; hop_idx++) {
+		if (hop_idx == MMU_HOP0) {
+			hop_addr[hop_idx] = get_hop0_addr(ctx);
+		} else {
+			hop_addr[hop_idx] = hl_mmu_get_next_hop_addr(ctx, curr_pte);
+			if (hop_addr[hop_idx] == ULLONG_MAX)
+				goto not_mapped;
+		}
+
+		hop_pte_addr[hop_idx] =
+				get_hop_pte_addr(ctx, mmu_prop, hop_addr, virt_addr, hop_idx);
+
+		curr_pte = *(u64 *) (uintptr_t) hop_pte_addr[hop_idx];
+	}
+
+	is_huge = curr_pte & mmu_prop->last_mask;
+
+	if (is_dram_addr && !is_huge) {
+		dev_err(hdev->dev, "DRAM unmapping should use huge pages only\n");
+		return -EFAULT;
+	}
+
+	if (!is_huge) {
+		hop_idx = MMU_HOP4;
+		hop_addr[hop_idx] = hl_mmu_get_next_hop_addr(ctx, curr_pte);
+		if (hop_addr[hop_idx] == ULLONG_MAX)
+			goto not_mapped;
+
+		hop_pte_addr[hop_idx] =
+				get_hop_pte_addr(ctx, mmu_prop, hop_addr, virt_addr, hop_idx);
+		curr_pte = *(u64 *) (uintptr_t) hop_pte_addr[hop_idx];
+		clear_hop3 = false;
+	}
+
+	if (hdev->dram_default_page_mapping && is_dram_addr) {
+		u64 default_pte = (prop->mmu_dram_default_page_addr &
+				HOP_PHYS_ADDR_MASK) | mmu_prop->last_mask |
+					PAGE_PRESENT_MASK;
+		if (curr_pte == default_pte) {
+			dev_err(hdev->dev,
+				"DRAM: hop3 PTE points to zero page, can't unmap, va: 0x%llx\n",
+					virt_addr);
+			goto not_mapped;
+		}
+
+		if (!(curr_pte & PAGE_PRESENT_MASK)) {
+			dev_err(hdev->dev,
+				"DRAM: hop3 PTE is cleared! can't unmap, va: 0x%llx\n",
+					virt_addr);
+			goto not_mapped;
+		}
+
+		hop_idx = MMU_HOP3;
+		write_final_pte(ctx, hop_pte_addr[hop_idx], default_pte);
+		put_pte(ctx, hop_addr[hop_idx]);
+	} else {
+		if (!(curr_pte & PAGE_PRESENT_MASK))
+			goto not_mapped;
+
+		if (hop_addr[MMU_HOP4])
+			clear_pte(ctx, hop_pte_addr[MMU_HOP4]);
+		else
+			clear_pte(ctx, hop_pte_addr[MMU_HOP3]);
+
+		if (hop_addr[MMU_HOP4] && !put_pte(ctx, hop_addr[MMU_HOP4]))
+			clear_hop3 = true;
+
+		if (!clear_hop3)
+			goto mapped;
+
+		for (hop_idx = MMU_HOP3; hop_idx >= 0; hop_idx--) {
+			clear_pte(ctx, hop_pte_addr[hop_idx]);
+
+			if (hop_idx == MMU_HOP0)
+				break;
+
+			if (put_pte(ctx, hop_addr[hop_idx]))
+				goto mapped;
+		}
+	}
+
+mapped:
+	return 0;
+
+not_mapped:
+	dev_err(hdev->dev, "virt addr 0x%llx is not mapped to phys addr\n",
+		virt_addr);
+
+	return -EINVAL;
+}
+
+static int hl_mmu_v1_map(struct hl_ctx *ctx, u64 virt_addr, u64 phys_addr,
+			u32 page_size, bool is_dram_addr)
+{
+	u64 hop_addr[MMU_V1_MAX_HOPS] = {0}, hop_pte_addr[MMU_V1_MAX_HOPS] = {0}, curr_pte = 0;
+	struct hl_device *hdev = ctx->hdev;
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	struct hl_mmu_properties *mmu_prop;
+	bool is_huge, hop_new[MMU_V1_MAX_HOPS] = {false};
+	int num_hops, hop_idx, prev_hop, rc = -ENOMEM;
+
+	/*
+	 * This mapping function can map a page or a huge page. For huge page
+	 * there are only 3 hops rather than 4. Currently the DRAM allocation
+	 * uses huge pages only but user memory could have been allocated with
+	 * one of the two page sizes. Since this is a common code for all the
+	 * three cases, we need this hugs page check.
+	 */
+	if (is_dram_addr) {
+		mmu_prop = &prop->dmmu;
+		is_huge = true;
+	} else if (page_size == prop->pmmu_huge.page_size) {
+		mmu_prop = &prop->pmmu_huge;
+		is_huge = true;
+	} else {
+		mmu_prop = &prop->pmmu;
+		is_huge = false;
+	}
+
+	num_hops = is_huge ? (MMU_V1_MAX_HOPS - 1) : MMU_V1_MAX_HOPS;
+
+	for (hop_idx = MMU_HOP0; hop_idx < num_hops; hop_idx++) {
+		if (hop_idx == MMU_HOP0) {
+			hop_addr[hop_idx] = get_hop0_addr(ctx);
+		} else {
+			hop_addr[hop_idx] =
+					get_alloc_next_hop_addr(ctx, curr_pte, &hop_new[hop_idx]);
+			if (hop_addr[hop_idx] == ULLONG_MAX)
+				goto err;
+		}
+
+		hop_pte_addr[hop_idx] =
+				get_hop_pte_addr(ctx, mmu_prop, hop_addr, virt_addr, hop_idx);
+		curr_pte = *(u64 *) (uintptr_t) hop_pte_addr[hop_idx];
+	}
+
+	if (hdev->dram_default_page_mapping && is_dram_addr) {
+		u64 default_pte = (prop->mmu_dram_default_page_addr &
+					HOP_PHYS_ADDR_MASK) | mmu_prop->last_mask |
+						PAGE_PRESENT_MASK;
+
+		if (curr_pte != default_pte) {
+			dev_err(hdev->dev,
+				"DRAM: mapping already exists for virt_addr 0x%llx\n",
+					virt_addr);
+			rc = -EINVAL;
+			goto err;
+		}
+
+		for (hop_idx = MMU_HOP1; hop_idx < num_hops; hop_idx++) {
+			if (hop_new[hop_idx]) {
+				dev_err(hdev->dev, "DRAM mapping should not allocate more hops\n");
+				rc = -EFAULT;
+				goto err;
+			}
+		}
+	} else if (curr_pte & PAGE_PRESENT_MASK) {
+		dev_err(hdev->dev,
+			"mapping already exists for virt_addr 0x%llx\n",
+				virt_addr);
+
+		for (hop_idx = MMU_HOP0; hop_idx < num_hops; hop_idx++)
+			dev_dbg(hdev->dev, "hop%d pte: 0x%llx (0x%llx)\n", hop_idx,
+					*(u64 *) (uintptr_t) hop_pte_addr[hop_idx],
+					hop_pte_addr[hop_idx]);
+
+		rc = -EINVAL;
+		goto err;
+	}
+
+	curr_pte = (phys_addr & HOP_PHYS_ADDR_MASK) | mmu_prop->last_mask
+			| PAGE_PRESENT_MASK;
+
+	write_final_pte(ctx, hop_pte_addr[num_hops - 1], curr_pte);
+
+	for (hop_idx = MMU_HOP1; hop_idx < num_hops; hop_idx++) {
+		prev_hop = hop_idx - 1;
+
+		if (hop_new[hop_idx]) {
+			curr_pte = (hop_addr[hop_idx] & HOP_PHYS_ADDR_MASK) | PAGE_PRESENT_MASK;
+			write_pte(ctx, hop_pte_addr[prev_hop], curr_pte);
+			if (hop_idx != MMU_HOP1)
+				get_pte(ctx, hop_addr[prev_hop]);
+		}
+	}
+
+	get_pte(ctx, hop_addr[num_hops - 1]);
+
+	return 0;
+
+err:
+	for (hop_idx = num_hops; hop_idx > MMU_HOP0; hop_idx--) {
+		if (hop_new[hop_idx])
+			free_hop(ctx, hop_addr[hop_idx]);
+	}
+
+	return rc;
+}
+
+/*
+ * hl_mmu_v1_swap_out - marks all mapping of the given ctx as swapped out
+ *
+ * @ctx: pointer to the context structure
+ *
+ */
+static void hl_mmu_v1_swap_out(struct hl_ctx *ctx)
+{
+
+}
+
+/*
+ * hl_mmu_v1_swap_in - marks all mapping of the given ctx as swapped in
+ *
+ * @ctx: pointer to the context structure
+ *
+ */
+static void hl_mmu_v1_swap_in(struct hl_ctx *ctx)
+{
+
+}
+
+static int hl_mmu_v1_get_tlb_info(struct hl_ctx *ctx, u64 virt_addr,
+				struct hl_mmu_hop_info *hops)
+{
+	struct hl_device *hdev = ctx->hdev;
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	struct hl_mmu_properties *mmu_prop;
+	bool is_dram_addr, is_pmmu_addr, is_pmmu_h_addr, is_huge;
+	int i, used_hops;
+
+	is_dram_addr = hl_mem_area_inside_range(virt_addr, prop->dmmu.page_size,
+						prop->dmmu.start_addr,
+						prop->dmmu.end_addr);
+	is_pmmu_addr = hl_mem_area_inside_range(virt_addr, prop->pmmu.page_size,
+						prop->pmmu.start_addr,
+						prop->pmmu.end_addr);
+	is_pmmu_h_addr = hl_mem_area_inside_range(virt_addr,
+						prop->pmmu_huge.page_size,
+						prop->pmmu_huge.start_addr,
+						prop->pmmu_huge.end_addr);
+	if (is_dram_addr) {
+		mmu_prop = &prop->dmmu;
+		is_huge = true;
+	} else if (is_pmmu_addr) {
+		mmu_prop = &prop->pmmu;
+		is_huge = false;
+	} else if (is_pmmu_h_addr) {
+		mmu_prop = &prop->pmmu_huge;
+		is_huge = true;
+	} else {
+		return -EINVAL;
+	}
+
+	used_hops = mmu_prop->num_hops;
+
+	/* huge pages use lesser hops */
+	if (is_huge)
+		used_hops--;
+
+	hops->hop_info[0].hop_addr = get_phys_hop0_addr(ctx);
+	hops->hop_info[0].hop_pte_addr =
+			hl_mmu_get_hop_pte_phys_addr(ctx, mmu_prop, 0,
+					hops->hop_info[0].hop_addr, virt_addr);
+	hops->hop_info[0].hop_pte_val =
+			hdev->asic_funcs->read_pte(hdev,
+						hops->hop_info[0].hop_pte_addr);
+
+	for (i = 1 ; i < used_hops ; i++) {
+		hops->hop_info[i].hop_addr =
+			hl_mmu_get_next_hop_addr(ctx,
+					hops->hop_info[i - 1].hop_pte_val);
+		if (hops->hop_info[i].hop_addr == ULLONG_MAX)
+			return -EFAULT;
+
+		hops->hop_info[i].hop_pte_addr =
+				hl_mmu_get_hop_pte_phys_addr(ctx, mmu_prop, i,
+						hops->hop_info[i].hop_addr,
+						virt_addr);
+		hops->hop_info[i].hop_pte_val =
+				hdev->asic_funcs->read_pte(hdev,
+						hops->hop_info[i].hop_pte_addr);
+
+		if (!(hops->hop_info[i].hop_pte_val & PAGE_PRESENT_MASK))
+			return -EFAULT;
+
+		if (hops->hop_info[i].hop_pte_val & mmu_prop->last_mask)
+			break;
+	}
+
+	/* if passed over all hops then no last hop was found */
+	if (i == mmu_prop->num_hops)
+		return -EFAULT;
+
+	if (!(hops->hop_info[i].hop_pte_val & PAGE_PRESENT_MASK))
+		return -EFAULT;
+
+	hops->used_hops = i + 1;
+
+	return 0;
+}
+
+/*
+ * hl_mmu_v1_prepare - prepare mmu  for working with mmu v1
+ *
+ * @hdev: pointer to the device structure
+ */
+void hl_mmu_v1_set_funcs(struct hl_device *hdev, struct hl_mmu_funcs *mmu)
+{
+	mmu->init = hl_mmu_v1_init;
+	mmu->fini = hl_mmu_v1_fini;
+	mmu->ctx_init = hl_mmu_v1_ctx_init;
+	mmu->ctx_fini = hl_mmu_v1_ctx_fini;
+	mmu->map = hl_mmu_v1_map;
+	mmu->unmap = hl_mmu_v1_unmap;
+	mmu->flush = flush;
+	mmu->swap_out = hl_mmu_v1_swap_out;
+	mmu->swap_in = hl_mmu_v1_swap_in;
+	mmu->get_tlb_info = hl_mmu_v1_get_tlb_info;
+}
diff --git a/drivers/misc/habanalabs/common/mmu/mmu_v2_hr.c b/drivers/misc/habanalabs/common/mmu/mmu_v2_hr.c
new file mode 100644
index 000000000..afe7ef964
--- /dev/null
+++ b/drivers/misc/habanalabs/common/mmu/mmu_v2_hr.c
@@ -0,0 +1,399 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright 2020-2022 HabanaLabs, Ltd.
+ * All Rights Reserved.
+ */
+
+#include "../habanalabs.h"
+#include "../../include/hw_ip/mmu/mmu_general.h"
+
+#include <linux/slab.h>
+
+static struct pgt_info *hl_mmu_v2_hr_get_pgt_info(struct hl_ctx *ctx, u64 phys_hop_addr)
+{
+	struct pgt_info *pgt_info = NULL;
+
+	hash_for_each_possible(ctx->hr_mmu_phys_hash, pgt_info, node,
+				(unsigned long) phys_hop_addr)
+		if (phys_hop_addr == pgt_info->phys_addr)
+			break;
+
+	return pgt_info;
+}
+
+static void hl_mmu_v2_hr_add_pgt_info(struct hl_ctx *ctx, struct pgt_info *pgt_info,
+					dma_addr_t phys_addr)
+{
+	hash_add(ctx->hr_mmu_phys_hash, &pgt_info->node, phys_addr);
+}
+
+static struct pgt_info *hl_mmu_v2_hr_get_hop0_pgt_info(struct hl_ctx *ctx)
+{
+	return &ctx->hdev->mmu_priv.hr.mmu_asid_hop0[ctx->asid];
+}
+
+/**
+ * hl_mmu_v2_hr_init() - initialize the MMU module.
+ * @hdev: habanalabs device structure.
+ *
+ * This function does the following:
+ * - Create a pool of pages for pgt_infos.
+ * - Create a shadow table for pgt
+ *
+ * Return: 0 for success, non-zero for failure.
+ */
+static inline int hl_mmu_v2_hr_init(struct hl_device *hdev)
+{
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+
+	return hl_mmu_hr_init(hdev, &hdev->mmu_priv.hr, prop->mmu_hop_table_size,
+				prop->mmu_pgt_size);
+}
+
+/**
+ * hl_mmu_v2_hr_fini() - release the MMU module.
+ * @hdev: habanalabs device structure.
+ *
+ * This function does the following:
+ * - Disable MMU in H/W.
+ * - Free the pgt_infos pool.
+ *
+ * All contexts should be freed before calling this function.
+ */
+static inline void hl_mmu_v2_hr_fini(struct hl_device *hdev)
+{
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+
+	hl_mmu_hr_fini(hdev, &hdev->mmu_priv.hr, prop->mmu_hop_table_size);
+}
+
+/**
+ * hl_mmu_v2_hr_ctx_init() - initialize a context for using the MMU module.
+ * @ctx: pointer to the context structure to initialize.
+ *
+ * Initialize a mutex to protect the concurrent mapping flow, a hash to hold all
+ * page tables hops related to this context.
+ * Return: 0 on success, non-zero otherwise.
+ */
+static int hl_mmu_v2_hr_ctx_init(struct hl_ctx *ctx)
+{
+	hash_init(ctx->hr_mmu_phys_hash);
+	return 0;
+}
+
+/*
+ * hl_mmu_v2_hr_ctx_fini - disable a ctx from using the mmu module
+ *
+ * @ctx: pointer to the context structure
+ *
+ * This function does the following:
+ * - Free any pgts which were not freed yet
+ * - Free the mutex
+ * - Free DRAM default page mapping hops
+ */
+static void hl_mmu_v2_hr_ctx_fini(struct hl_ctx *ctx)
+{
+	struct hl_device *hdev = ctx->hdev;
+	struct pgt_info *pgt_info;
+	struct hlist_node *tmp;
+	int i;
+
+	if (!hash_empty(ctx->hr_mmu_phys_hash))
+		dev_err(hdev->dev, "ctx %d is freed while it has pgts in use\n",
+			ctx->asid);
+
+	hash_for_each_safe(ctx->hr_mmu_phys_hash, i, tmp, pgt_info, node) {
+		dev_err_ratelimited(hdev->dev,
+			"pgt_info of addr 0x%llx of asid %d was not destroyed, num_ptes: %d\n",
+			pgt_info->phys_addr, ctx->asid, pgt_info->num_of_ptes);
+		hl_mmu_hr_free_hop_remove_pgt(pgt_info, &ctx->hdev->mmu_priv.hr,
+							ctx->hdev->asic_prop.mmu_hop_table_size);
+	}
+}
+
+static int _hl_mmu_v2_hr_unmap(struct hl_ctx *ctx,
+				u64 virt_addr, bool is_dram_addr)
+{
+	u64 curr_pte, scrambled_virt_addr, hop_pte_phys_addr[MMU_ARCH_6_HOPS] = { 0 };
+	struct pgt_info *hops_pgt_info[MMU_ARCH_6_HOPS] = { NULL };
+	struct hl_device *hdev = ctx->hdev;
+	struct asic_fixed_properties *prop;
+	struct hl_mmu_properties *mmu_prop;
+	bool is_huge = false;
+	int i, hop_last;
+
+	prop = &hdev->asic_prop;
+
+	/* shifts and masks are the same in PMMU and HMMU, use one of them */
+	mmu_prop = is_dram_addr ? &prop->dmmu : &prop->pmmu;
+	hop_last = mmu_prop->num_hops - 1;
+
+	scrambled_virt_addr = hdev->asic_funcs->scramble_addr(hdev, virt_addr);
+	curr_pte = 0;
+
+	for (i = 0 ; i < mmu_prop->num_hops ; i++) {
+		/* we get HOP0 differently, it doesn't need curr_pte */
+		if (i == 0)
+			hops_pgt_info[i] = hl_mmu_v2_hr_get_hop0_pgt_info(ctx);
+		else
+			hops_pgt_info[i] = hl_mmu_hr_get_next_hop_pgt_info(ctx,
+					&ctx->hdev->mmu_func[MMU_HR_PGT].hr_funcs, curr_pte);
+		if (!hops_pgt_info[i])
+			goto not_mapped;
+
+		hop_pte_phys_addr[i] = hl_mmu_get_hop_pte_phys_addr(ctx, mmu_prop, i,
+									hops_pgt_info[i]->phys_addr,
+									scrambled_virt_addr);
+		if (hop_pte_phys_addr[i] == U64_MAX)
+			return -EFAULT;
+
+		curr_pte = *(u64 *) (uintptr_t) hl_mmu_hr_pte_phys_to_virt(ctx, hops_pgt_info[i],
+							hop_pte_phys_addr[i],
+							ctx->hdev->asic_prop.mmu_hop_table_size);
+
+		if ((i < hop_last) && (curr_pte & mmu_prop->last_mask)) {
+			hop_last = i;
+			is_huge = true;
+			break;
+		}
+	}
+
+	if (is_dram_addr && !is_huge) {
+		dev_err(hdev->dev, "DRAM unmapping should use huge pages only\n");
+		return -EFAULT;
+	}
+
+	if (!(curr_pte & PAGE_PRESENT_MASK))
+		goto not_mapped;
+
+	for (i = hop_last ; i > 0 ; i--) {
+		hl_mmu_hr_clear_pte(ctx, hops_pgt_info[i], hop_pte_phys_addr[i],
+						ctx->hdev->asic_prop.mmu_hop_table_size);
+
+		if (hl_mmu_hr_put_pte(ctx, hops_pgt_info[i], &ctx->hdev->mmu_priv.hr,
+						ctx->hdev->asic_prop.mmu_hop_table_size))
+			goto mapped;
+	}
+	hl_mmu_hr_clear_pte(ctx, hops_pgt_info[0], hop_pte_phys_addr[0],
+						ctx->hdev->asic_prop.mmu_hop_table_size);
+
+mapped:
+	return 0;
+
+not_mapped:
+	dev_err(hdev->dev, "virt addr 0x%llx is not mapped to phys addr\n", virt_addr);
+
+	return -EINVAL;
+}
+
+static int hl_mmu_v2_get_last_hop(struct hl_mmu_properties *mmu_prop, u32 page_size)
+{
+	int hop;
+
+	for (hop = (mmu_prop->num_hops - 1); hop; hop--) {
+		if (mmu_prop->hop_shifts[hop] == 0)
+			continue;
+
+		if (page_size <= (1 << mmu_prop->hop_shifts[hop]))
+			break;
+	}
+
+	return hop;
+}
+
+static int _hl_mmu_v2_hr_map(struct hl_ctx *ctx,
+			u64 virt_addr, u64 phys_addr,
+			u32 page_size, bool is_dram_addr)
+{
+	u64 hop_pte_phys_addr[MMU_ARCH_6_HOPS] = { 0 },
+		curr_pte = 0, scrambled_virt_addr, scrambled_phys_addr;
+	struct pgt_info *hops_pgt_info[MMU_ARCH_6_HOPS] = { NULL };
+	bool hop_new[MMU_ARCH_6_HOPS] = { false };
+	struct hl_device *hdev = ctx->hdev;
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	struct hl_mmu_properties *mmu_prop;
+	int i, hop_last, rc = -ENOMEM;
+
+	/*
+	 * This mapping function can map a page or a huge page. For huge page
+	 * there are only 4 hops rather than 5. Currently the DRAM allocation
+	 * uses huge pages only but user memory could have been allocated with
+	 * one of the two page sizes. Since this is a common code for all the
+	 * three cases, we need this hugs page check.
+	 */
+	if (is_dram_addr)
+		mmu_prop = &prop->dmmu;
+	else if (page_size == prop->pmmu_huge.page_size)
+		mmu_prop = &prop->pmmu_huge;
+	else
+		mmu_prop = &prop->pmmu;
+
+	hop_last = hl_mmu_v2_get_last_hop(mmu_prop, page_size);
+	if (hop_last <= 0) {
+		dev_err(ctx->hdev->dev, "Invalid last HOP %d\n", hop_last);
+		return -EFAULT;
+	}
+
+	scrambled_virt_addr = hdev->asic_funcs->scramble_addr(hdev, virt_addr);
+	scrambled_phys_addr = hdev->asic_funcs->scramble_addr(hdev, phys_addr);
+
+	for (i = 0 ; i <= hop_last ; i++) {
+
+		if (i == 0)
+			hops_pgt_info[i] = hl_mmu_v2_hr_get_hop0_pgt_info(ctx);
+		else
+			hops_pgt_info[i] = hl_mmu_hr_get_alloc_next_hop(ctx,
+							&ctx->hdev->mmu_priv.hr,
+							&ctx->hdev->mmu_func[MMU_HR_PGT].hr_funcs,
+							mmu_prop, curr_pte, &hop_new[i]);
+		if (!hops_pgt_info[i])
+			goto err;
+
+		hop_pte_phys_addr[i] = hl_mmu_get_hop_pte_phys_addr(ctx, mmu_prop, i,
+									hops_pgt_info[i]->phys_addr,
+									scrambled_virt_addr);
+		curr_pte = *(u64 *) (uintptr_t) hl_mmu_hr_pte_phys_to_virt(ctx, hops_pgt_info[i],
+							hop_pte_phys_addr[i],
+							ctx->hdev->asic_prop.mmu_hop_table_size);
+	}
+
+	if (curr_pte & PAGE_PRESENT_MASK) {
+		dev_err(hdev->dev, "mapping already exists for virt_addr 0x%llx\n",
+									scrambled_virt_addr);
+
+		for (i = 0 ; i <= hop_last ; i++)
+			dev_dbg(hdev->dev, "hop%d pte: 0x%llx (0x%llx)\n",
+					i,
+					*(u64 *) (uintptr_t)
+					hl_mmu_hr_pte_phys_to_virt(ctx, hops_pgt_info[i],
+							hop_pte_phys_addr[i],
+							ctx->hdev->asic_prop.mmu_hop_table_size),
+					hop_pte_phys_addr[i]);
+		rc = -EINVAL;
+		goto err;
+	}
+
+	curr_pte = (scrambled_phys_addr & HOP_PHYS_ADDR_MASK) | mmu_prop->last_mask
+			| PAGE_PRESENT_MASK;
+
+	/* Write the PTEs */
+	hl_mmu_hr_write_pte(ctx, hops_pgt_info[hop_last], hop_pte_phys_addr[hop_last], curr_pte,
+							ctx->hdev->asic_prop.mmu_hop_table_size);
+
+	/* for each new hop, add its address to the table of previous-hop */
+	for (i = 1 ; i <= hop_last ; i++) {
+		if (hop_new[i]) {
+			curr_pte = (hops_pgt_info[i]->phys_addr & HOP_PHYS_ADDR_MASK) |
+							PAGE_PRESENT_MASK;
+			hl_mmu_hr_write_pte(ctx, hops_pgt_info[i - 1], hop_pte_phys_addr[i - 1],
+						curr_pte, ctx->hdev->asic_prop.mmu_hop_table_size);
+			if (i - 1)
+				hl_mmu_hr_get_pte(ctx, &ctx->hdev->mmu_func[MMU_HR_PGT].hr_funcs,
+								hops_pgt_info[i - 1]->phys_addr);
+		}
+	}
+
+	hl_mmu_hr_get_pte(ctx, &ctx->hdev->mmu_func[MMU_HR_PGT].hr_funcs,
+						hops_pgt_info[hop_last]->phys_addr);
+
+	return 0;
+
+err:
+	for (i = 1 ; i <= hop_last ; i++)
+		if (hop_new[i] && hops_pgt_info[i])
+			hl_mmu_hr_free_hop_remove_pgt(hops_pgt_info[i], &ctx->hdev->mmu_priv.hr,
+							ctx->hdev->asic_prop.mmu_hop_table_size);
+
+	return rc;
+}
+
+/*
+ * hl_mmu_v2_swap_out - marks all mapping of the given ctx as swapped out
+ *
+ * @ctx: pointer to the context structure
+ *
+ */
+static void hl_mmu_v2_hr_swap_out(struct hl_ctx *ctx)
+{
+
+}
+
+/*
+ * hl_mmu_v2_swap_in - marks all mapping of the given ctx as swapped in
+ *
+ * @ctx: pointer to the context structure
+ *
+ */
+static void hl_mmu_v2_hr_swap_in(struct hl_ctx *ctx)
+{
+
+}
+
+static int hl_mmu_v2_hr_get_tlb_mapping_params(struct hl_device *hdev,
+							struct hl_mmu_properties **mmu_prop,
+							struct hl_mmu_hop_info *hops,
+							u64 virt_addr, bool *is_huge)
+{
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	bool is_dram_addr, is_pmmu_addr, is_pmmu_h_addr;
+
+	is_dram_addr = hl_mem_area_inside_range(virt_addr, prop->dmmu.page_size,
+						prop->dmmu.start_addr,
+						prop->dmmu.end_addr);
+	is_pmmu_addr = hl_mem_area_inside_range(virt_addr, prop->pmmu.page_size,
+						prop->pmmu.start_addr,
+						prop->pmmu.end_addr);
+	is_pmmu_h_addr = hl_mem_area_inside_range(virt_addr,
+						prop->pmmu_huge.page_size,
+						prop->pmmu_huge.start_addr,
+						prop->pmmu_huge.end_addr);
+	if (is_dram_addr) {
+		*mmu_prop = &prop->dmmu;
+		*is_huge = true;
+		hops->range_type = HL_VA_RANGE_TYPE_DRAM;
+	} else if (is_pmmu_addr) {
+		*mmu_prop = &prop->pmmu;
+		*is_huge = false;
+		hops->range_type = HL_VA_RANGE_TYPE_HOST;
+	} else if (is_pmmu_h_addr) {
+		*mmu_prop = &prop->pmmu_huge;
+		*is_huge = true;
+		hops->range_type = HL_VA_RANGE_TYPE_HOST_HUGE;
+	} else {
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int hl_mmu_v2_hr_get_tlb_info(struct hl_ctx *ctx, u64 virt_addr,
+					struct hl_mmu_hop_info *hops)
+{
+	return hl_mmu_hr_get_tlb_info(ctx, virt_addr, hops,
+					&ctx->hdev->mmu_func[MMU_HR_PGT].hr_funcs);
+}
+
+/*
+ * hl_mmu_v2_prepare - prepare mmu_if for working with mmu v2
+ *
+ * @hdev: pointer to the device structure
+ * @mmu_if: pointer to the mmu interface structure
+ */
+void hl_mmu_v2_hr_set_funcs(struct hl_device *hdev, struct hl_mmu_funcs *mmu)
+{
+	mmu->init = hl_mmu_v2_hr_init;
+	mmu->fini = hl_mmu_v2_hr_fini;
+	mmu->ctx_init = hl_mmu_v2_hr_ctx_init;
+	mmu->ctx_fini = hl_mmu_v2_hr_ctx_fini;
+	mmu->map = _hl_mmu_v2_hr_map;
+	mmu->unmap = _hl_mmu_v2_hr_unmap;
+	mmu->flush = hl_mmu_hr_flush;
+	mmu->swap_out = hl_mmu_v2_hr_swap_out;
+	mmu->swap_in = hl_mmu_v2_hr_swap_in;
+	mmu->get_tlb_info = hl_mmu_v2_hr_get_tlb_info;
+	mmu->hr_funcs.get_hop0_pgt_info = hl_mmu_v2_hr_get_hop0_pgt_info;
+	mmu->hr_funcs.get_pgt_info = hl_mmu_v2_hr_get_pgt_info;
+	mmu->hr_funcs.add_pgt_info = hl_mmu_v2_hr_add_pgt_info;
+	mmu->hr_funcs.get_tlb_mapping_params = hl_mmu_v2_hr_get_tlb_mapping_params;
+}