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Date: Tue, 28 Jun 2022 13:59:57 +0300
From: Oded Gabbay <ogabbay@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: gregkh@...uxfoundation.org, Moti Haimovski <mhaimovski@...ana.ai>
Subject: [PATCH v2 11/12] habanalabs: add gaudi2 MMU support
From: Moti Haimovski <mhaimovski@...ana.ai>
Gaudi2 has new MMU units. A PMMU for device->host accesses, and HMMU
for HBM accesses.
The page tables of both MMUs are located in the host's memory (referred
to in the code as host-resident pgt).
Signed-off-by: Moti Haimovski <mhaimovski@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
Changes in v2:
- Remove mfence command as it is redundant
- Use correct type for passing dma_addr_t pointer
- Add explicit casting from integer to pointer
drivers/misc/habanalabs/common/debugfs.c | 77 ++-
drivers/misc/habanalabs/common/habanalabs.h | 99 +++-
.../misc/habanalabs/common/habanalabs_ioctl.c | 2 +-
drivers/misc/habanalabs/common/memory.c | 21 +-
drivers/misc/habanalabs/common/mmu/Makefile | 3 +-
drivers/misc/habanalabs/common/mmu/mmu.c | 496 +++++++++++++++++-
.../misc/habanalabs/common/mmu/mmu_v2_hr.c | 399 ++++++++++++++
7 files changed, 1064 insertions(+), 33 deletions(-)
create mode 100644 drivers/misc/habanalabs/common/mmu/mmu_v2_hr.c
diff --git a/drivers/misc/habanalabs/common/debugfs.c b/drivers/misc/habanalabs/common/debugfs.c
index 90273481a466..3da39662abd9 100644
--- a/drivers/misc/habanalabs/common/debugfs.c
+++ b/drivers/misc/habanalabs/common/debugfs.c
@@ -450,7 +450,7 @@ static int mmu_show(struct seq_file *s, void *data)
if (hl_mmu_get_tlb_info(ctx, virt_addr, &hops_info)) {
dev_err(hdev->dev, "virt addr 0x%llx is not mapped to phys addr\n",
virt_addr);
- return 0;
+ goto put_ctx;
}
hl_mmu_va_to_pa(ctx, virt_addr, &phys_addr);
@@ -476,6 +476,10 @@ static int mmu_show(struct seq_file *s, void *data)
i, hops_info.hop_info[i].hop_pte_val);
}
+put_ctx:
+ if (dev_entry->mmu_asid != HL_KERNEL_ASID_ID)
+ hl_ctx_put(ctx);
+
return 0;
}
@@ -522,6 +526,66 @@ static ssize_t mmu_asid_va_write(struct file *file, const char __user *buf,
return -EINVAL;
}
+static int mmu_ack_error(struct seq_file *s, void *data)
+{
+ struct hl_debugfs_entry *entry = s->private;
+ struct hl_dbg_device_entry *dev_entry = entry->dev_entry;
+ struct hl_device *hdev = dev_entry->hdev;
+ int rc;
+
+ if (!hdev->mmu_enable)
+ return 0;
+
+ if (!dev_entry->mmu_cap_mask) {
+ dev_err(hdev->dev, "mmu_cap_mask is not set\n");
+ goto err;
+ }
+
+ rc = hdev->asic_funcs->ack_mmu_errors(hdev, dev_entry->mmu_cap_mask);
+ if (rc)
+ goto err;
+
+ return 0;
+err:
+ return -EINVAL;
+}
+
+static ssize_t mmu_ack_error_value_write(struct file *file,
+ const char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ struct seq_file *s = file->private_data;
+ struct hl_debugfs_entry *entry = s->private;
+ struct hl_dbg_device_entry *dev_entry = entry->dev_entry;
+ struct hl_device *hdev = dev_entry->hdev;
+ char kbuf[MMU_KBUF_SIZE];
+ ssize_t rc;
+
+ if (!hdev->mmu_enable)
+ return count;
+
+ if (count > sizeof(kbuf) - 1)
+ goto err;
+
+ if (copy_from_user(kbuf, buf, count))
+ goto err;
+
+ kbuf[count] = 0;
+
+ if (strncmp(kbuf, "0x", 2))
+ goto err;
+
+ rc = kstrtoull(kbuf, 16, &dev_entry->mmu_cap_mask);
+ if (rc)
+ goto err;
+
+ return count;
+err:
+ dev_err(hdev->dev, "usage: echo <0xmmu_cap_mask > > mmu_error\n");
+
+ return -EINVAL;
+}
+
static int engines_show(struct seq_file *s, void *data)
{
struct hl_debugfs_entry *entry = s->private;
@@ -667,7 +731,8 @@ static int device_va_to_pa(struct hl_device *hdev, u64 virt_addr, u32 size,
dev_err(hdev->dev,
"virt addr 0x%llx is not mapped\n",
virt_addr);
- return -EINVAL;
+ rc = -EINVAL;
+ goto put_ctx;
}
rc = hl_mmu_va_to_pa(ctx, virt_addr, phys_addr);
@@ -678,6 +743,9 @@ static int device_va_to_pa(struct hl_device *hdev, u64 virt_addr, u32 size,
rc = -EINVAL;
}
+put_ctx:
+ hl_ctx_put(ctx);
+
return rc;
}
@@ -728,7 +796,7 @@ static void hl_access_host_mem(struct hl_device *hdev, u64 addr, u64 *val,
}
static int hl_access_mem(struct hl_device *hdev, u64 addr, u64 *val,
- enum debugfs_access_type acc_type)
+ enum debugfs_access_type acc_type)
{
size_t acc_size = (acc_type == DEBUGFS_READ64 || acc_type == DEBUGFS_WRITE64) ?
sizeof(u64) : sizeof(u32);
@@ -1462,7 +1530,8 @@ static const struct hl_info_list hl_debugfs_list[] = {
{"vm", vm_show, NULL},
{"userptr_lookup", userptr_lookup_show, userptr_lookup_write},
{"mmu", mmu_show, mmu_asid_va_write},
- {"engines", engines_show, NULL}
+ {"mmu_error", mmu_ack_error, mmu_ack_error_value_write},
+ {"engines", engines_show, NULL},
};
static int hl_debugfs_open(struct inode *inode, struct file *file)
diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index 7723575ba737..0bea03a116fa 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -104,6 +104,18 @@ enum hl_mmu_page_table_location {
MMU_NUM_PGT_LOCATIONS /* num of PGT locations */
};
+/**
+ * enum hl_mmu_enablement - what mmu modules to enable
+ * @MMU_EN_NONE: mmu disabled.
+ * @MMU_EN_ALL: enable all.
+ * @MMU_EN_PMMU_ONLY: Enable only the PMMU leaving the DMMU disabled.
+ */
+enum hl_mmu_enablement {
+ MMU_EN_NONE = 0,
+ MMU_EN_ALL = 1,
+ MMU_EN_PMMU_ONLY = 3, /* N/A for Goya/Gaudi */
+};
+
/*
* HL_RSVD_SOBS 'sync stream' reserved sync objects per QMAN stream
* HL_RSVD_MONS 'sync stream' reserved monitors per QMAN stream
@@ -238,20 +250,27 @@ struct hl_gen_wait_properties {
/**
* struct pgt_info - MMU hop page info.
- * @node: hash linked-list node for the pgts shadow hash of pgts.
+ * @node: hash linked-list node for the pgts on host (shadow pgts for device resident MMU and
+ * actual pgts for host resident MMU).
* @phys_addr: physical address of the pgt.
- * @shadow_addr: shadow hop in the host.
+ * @virt_addr: host virtual address of the pgt (see above device/host resident).
+ * @shadow_addr: shadow hop in the host for device resident MMU.
* @ctx: pointer to the owner ctx.
- * @num_of_ptes: indicates how many ptes are used in the pgt.
+ * @num_of_ptes: indicates how many ptes are used in the pgt. used only for dynamically
+ * allocated HOPs (all HOPs but HOP0)
+ *
+ * The MMU page tables hierarchy can be placed either on the device's DRAM (in which case shadow
+ * pgts will be stored on host memory) or on host memory (in which case no shadow is required).
*
- * The MMU page tables hierarchy is placed on the DRAM. When a new level (hop)
- * is needed during mapping, a new page is allocated and this structure holds
- * its essential information. During unmapping, if no valid PTEs remained in the
- * page, it is freed with its pgt_info structure.
+ * When a new level (hop) is needed during mapping this structure will be used to describe
+ * the newly allocated hop as well as to track number of PTEs in it.
+ * During unmapping, if no valid PTEs remained in the page of a newly allocated hop, it is
+ * freed with its pgt_info structure.
*/
struct pgt_info {
struct hlist_node node;
u64 phys_addr;
+ u64 virt_addr;
u64 shadow_addr;
struct hl_ctx *ctx;
int num_of_ptes;
@@ -1704,6 +1723,9 @@ struct hl_cs_outcome_store {
* @mem_hash: holds mapping from virtual address to virtual memory area
* descriptor (hl_vm_phys_pg_list or hl_userptr).
* @mmu_shadow_hash: holds a mapping from shadow address to pgt_info structure.
+ * @hr_mmu_phys_hash: if host-resident MMU is used, holds a mapping from
+ * MMU-hop-page physical address to its host-resident
+ * pgt_info structure.
* @hpriv: pointer to the private (Kernel Driver) data of the process (fd).
* @hdev: pointer to the device structure.
* @refcount: reference counter for the context. Context is released only when
@@ -1742,6 +1764,7 @@ struct hl_cs_outcome_store {
struct hl_ctx {
DECLARE_HASHTABLE(mem_hash, MEM_HASH_TABLE_BITS);
DECLARE_HASHTABLE(mmu_shadow_hash, MMU_HASH_TABLE_BITS);
+ DECLARE_HASHTABLE(hr_mmu_phys_hash, MMU_HASH_TABLE_BITS);
struct hl_fpriv *hpriv;
struct hl_device *hdev;
struct kref refcount;
@@ -2199,6 +2222,7 @@ struct hl_debugfs_entry {
* @state_dump_sem: protects state_dump.
* @addr: next address to read/write from/to in read/write32.
* @mmu_addr: next virtual address to translate to physical address in mmu_show.
+ * @mmu_cap_mask: mmu hw capability mask, to be used in mmu_ack_error.
* @userptr_lookup: the target user ptr to look up for on demand.
* @mmu_asid: ASID to use while translating in mmu_show.
* @state_dump_head: index of the latest state dump
@@ -2229,6 +2253,7 @@ struct hl_dbg_device_entry {
struct rw_semaphore state_dump_sem;
u64 addr;
u64 mmu_addr;
+ u64 mmu_cap_mask;
u64 userptr_lookup;
u32 mmu_asid;
u32 state_dump_head;
@@ -2612,11 +2637,27 @@ struct hl_mmu_per_hop_info {
struct hl_mmu_hop_info {
u64 scrambled_vaddr;
u64 unscrambled_paddr;
- struct hl_mmu_per_hop_info hop_info[MMU_ARCH_5_HOPS];
+ struct hl_mmu_per_hop_info hop_info[MMU_ARCH_6_HOPS];
u32 used_hops;
enum hl_va_range_type range_type;
};
+/**
+ * struct hl_hr_mmu_funcs - Device related host resident MMU functions.
+ * @get_hop0_pgt_info: get page table info structure for HOP0.
+ * @get_pgt_info: get page table info structure for HOP other than HOP0.
+ * @add_pgt_info: add page table info structure to hash.
+ * @get_tlb_mapping_params: get mapping parameters needed for getting TLB info for specific mapping.
+ */
+struct hl_hr_mmu_funcs {
+ struct pgt_info *(*get_hop0_pgt_info)(struct hl_ctx *ctx);
+ struct pgt_info *(*get_pgt_info)(struct hl_ctx *ctx, u64 phys_hop_addr);
+ void (*add_pgt_info)(struct hl_ctx *ctx, struct pgt_info *pgt_info, dma_addr_t phys_addr);
+ int (*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 hl_mmu_funcs - Device related MMU functions.
* @init: initialize the MMU module.
@@ -2631,22 +2672,21 @@ struct hl_mmu_hop_info {
* @get_tlb_info: returns the list of hops and hop-entries used that were
* created in order to translate the giver virtual address to a
* physical one.
+ * @hr_funcs: functions specific to host resident MMU.
*/
struct hl_mmu_funcs {
int (*init)(struct hl_device *hdev);
void (*fini)(struct hl_device *hdev);
int (*ctx_init)(struct hl_ctx *ctx);
void (*ctx_fini)(struct hl_ctx *ctx);
- int (*map)(struct hl_ctx *ctx,
- u64 virt_addr, u64 phys_addr, u32 page_size,
- bool is_dram_addr);
- int (*unmap)(struct hl_ctx *ctx,
- u64 virt_addr, bool is_dram_addr);
+ int (*map)(struct hl_ctx *ctx, u64 virt_addr, u64 phys_addr, u32 page_size,
+ bool is_dram_addr);
+ int (*unmap)(struct hl_ctx *ctx, u64 virt_addr, bool is_dram_addr);
void (*flush)(struct hl_ctx *ctx);
void (*swap_out)(struct hl_ctx *ctx);
void (*swap_in)(struct hl_ctx *ctx);
- int (*get_tlb_info)(struct hl_ctx *ctx,
- u64 virt_addr, struct hl_mmu_hop_info *hops);
+ int (*get_tlb_info)(struct hl_ctx *ctx, u64 virt_addr, struct hl_mmu_hop_info *hops);
+ struct hl_hr_mmu_funcs hr_funcs;
};
/**
@@ -3460,10 +3500,39 @@ int hl_mmu_prefetch_cache_range(struct hl_ctx *ctx, u32 flags, u32 asid, u64 va,
u64 hl_mmu_get_next_hop_addr(struct hl_ctx *ctx, u64 curr_pte);
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);
+void hl_mmu_hr_flush(struct hl_ctx *ctx);
+int hl_mmu_hr_init(struct hl_device *hdev, struct hl_mmu_hr_priv *hr_priv, u32 hop_table_size,
+ u64 pgt_size);
+void hl_mmu_hr_fini(struct hl_device *hdev, struct hl_mmu_hr_priv *hr_priv, u32 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);
+u64 hl_mmu_hr_pte_phys_to_virt(struct hl_ctx *ctx, struct pgt_info *pgt, u64 phys_pte_addr,
+ u32 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);
+void hl_mmu_hr_clear_pte(struct hl_ctx *ctx, struct pgt_info *pgt_info, u64 phys_pte_addr,
+ u32 hop_table_size);
+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);
+void hl_mmu_hr_get_pte(struct hl_ctx *ctx, struct hl_hr_mmu_funcs *hr_func, u64 phys_hop_addr);
+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);
+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 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);
+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);
void hl_mmu_swap_out(struct hl_ctx *ctx);
void hl_mmu_swap_in(struct hl_ctx *ctx);
int hl_mmu_if_set_funcs(struct hl_device *hdev);
void hl_mmu_v1_set_funcs(struct hl_device *hdev, struct hl_mmu_funcs *mmu);
+void hl_mmu_v2_hr_set_funcs(struct hl_device *hdev, struct hl_mmu_funcs *mmu);
int hl_mmu_va_to_pa(struct hl_ctx *ctx, u64 virt_addr, u64 *phys_addr);
int hl_mmu_get_tlb_info(struct hl_ctx *ctx, u64 virt_addr,
struct hl_mmu_hop_info *hops);
diff --git a/drivers/misc/habanalabs/common/habanalabs_ioctl.c b/drivers/misc/habanalabs/common/habanalabs_ioctl.c
index a7a00f8dab30..96e12ab7a924 100644
--- a/drivers/misc/habanalabs/common/habanalabs_ioctl.c
+++ b/drivers/misc/habanalabs/common/habanalabs_ioctl.c
@@ -69,7 +69,7 @@ static int hw_ip_info(struct hl_device *hdev, struct hl_info_args *args)
dram_available_size = prop->dram_size - dram_kmd_size;
- if (hdev->mmu_enable)
+ if (hdev->mmu_enable == MMU_EN_ALL)
hw_ip.dram_size = DIV_ROUND_DOWN_ULL(dram_available_size,
prop->dram_page_size) * prop->dram_page_size;
else
diff --git a/drivers/misc/habanalabs/common/memory.c b/drivers/misc/habanalabs/common/memory.c
index 0964c26d717c..61bc1bfe984a 100644
--- a/drivers/misc/habanalabs/common/memory.c
+++ b/drivers/misc/habanalabs/common/memory.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * Copyright 2016-2021 HabanaLabs, Ltd.
+ * Copyright 2016-2022 HabanaLabs, Ltd.
* All Rights Reserved.
*/
@@ -627,7 +627,7 @@ static u64 get_va_block(struct hl_device *hdev,
/* Check if we need to ignore hint address */
if ((is_align_pow_2 && (hint_addr & (va_block_align - 1))) ||
- (!is_align_pow_2 && is_hint_dram_addr &&
+ (!is_align_pow_2 && is_hint_dram_addr &&
do_div(tmp_hint_addr, va_range->page_size))) {
if (force_hint) {
@@ -2477,17 +2477,20 @@ bool hl_userptr_is_pinned(struct hl_device *hdev, u64 addr,
* va_range_init() - initialize virtual addresses range.
* @hdev: pointer to the habanalabs device structure.
* @va_ranges: pointer to va_ranges array.
- * @start: range start address.
- * @end: range end address.
+ * @range_type: virtual address range type.
+ * @start: range start address, inclusive.
+ * @end: range end address, inclusive.
* @page_size: page size for this va_range.
*
* This function does the following:
* - Initializes the virtual addresses list of the given range with the given
* addresses.
*/
-static int va_range_init(struct hl_device *hdev, struct hl_va_range *va_range,
- u64 start, u64 end, u32 page_size)
+static int va_range_init(struct hl_device *hdev, struct hl_va_range **va_ranges,
+ enum hl_va_range_type range_type, u64 start,
+ u64 end, u32 page_size)
{
+ struct hl_va_range *va_range = va_ranges[range_type];
int rc;
INIT_LIST_HEAD(&va_range->list);
@@ -2605,7 +2608,7 @@ static int vm_ctx_init_with_ranges(struct hl_ctx *ctx,
mutex_init(&ctx->va_range[HL_VA_RANGE_TYPE_HOST]->lock);
- rc = va_range_init(hdev, ctx->va_range[HL_VA_RANGE_TYPE_HOST],
+ rc = va_range_init(hdev, ctx->va_range, HL_VA_RANGE_TYPE_HOST,
host_range_start, host_range_end, host_page_size);
if (rc) {
dev_err(hdev->dev, "failed to init host vm range\n");
@@ -2616,7 +2619,7 @@ static int vm_ctx_init_with_ranges(struct hl_ctx *ctx,
mutex_init(&ctx->va_range[HL_VA_RANGE_TYPE_HOST_HUGE]->lock);
rc = va_range_init(hdev,
- ctx->va_range[HL_VA_RANGE_TYPE_HOST_HUGE],
+ ctx->va_range, HL_VA_RANGE_TYPE_HOST_HUGE,
host_huge_range_start, host_huge_range_end,
host_huge_page_size);
if (rc) {
@@ -2632,7 +2635,7 @@ static int vm_ctx_init_with_ranges(struct hl_ctx *ctx,
mutex_init(&ctx->va_range[HL_VA_RANGE_TYPE_DRAM]->lock);
- rc = va_range_init(hdev, ctx->va_range[HL_VA_RANGE_TYPE_DRAM],
+ rc = va_range_init(hdev, ctx->va_range, HL_VA_RANGE_TYPE_DRAM,
dram_range_start, dram_range_end, dram_page_size);
if (rc) {
dev_err(hdev->dev, "failed to init dram vm range\n");
diff --git a/drivers/misc/habanalabs/common/mmu/Makefile b/drivers/misc/habanalabs/common/mmu/Makefile
index d852c3874658..1806c524e04a 100644
--- a/drivers/misc/habanalabs/common/mmu/Makefile
+++ b/drivers/misc/habanalabs/common/mmu/Makefile
@@ -1,2 +1,3 @@
# SPDX-License-Identifier: GPL-2.0-only
-HL_COMMON_MMU_FILES := common/mmu/mmu.o common/mmu/mmu_v1.o
+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
index f3734718d94f..0cbe89285f96 100644
--- a/drivers/misc/habanalabs/common/mmu/mmu.c
+++ b/drivers/misc/habanalabs/common/mmu/mmu.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * Copyright 2016-2020 HabanaLabs, Ltd.
+ * Copyright 2016-2022 HabanaLabs, Ltd.
* All Rights Reserved.
*/
@@ -51,8 +51,17 @@ int hl_mmu_init(struct hl_device *hdev)
return rc;
}
- if (hdev->mmu_func[MMU_HR_PGT].init != NULL)
+ 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;
}
@@ -103,8 +112,17 @@ int hl_mmu_ctx_init(struct hl_ctx *ctx)
return rc;
}
- if (hdev->mmu_func[MMU_HR_PGT].ctx_init != NULL)
+ 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;
}
@@ -607,6 +625,11 @@ int hl_mmu_if_set_funcs(struct hl_device *hdev)
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);
@@ -745,3 +768,470 @@ u64 hl_mmu_get_hop_pte_phys_addr(struct hl_ctx *ctx, struct hl_mmu_properties *m
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 *) 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_v2_hr.c b/drivers/misc/habanalabs/common/mmu/mmu_v2_hr.c
new file mode 100644
index 000000000000..afe7ef964f82
--- /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;
+}
--
2.25.1
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