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author | Luca Boccassi <luca.boccassi@gmail.com> | 2018-11-01 11:59:50 +0000 |
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committer | Luca Boccassi <luca.boccassi@gmail.com> | 2018-11-01 12:00:19 +0000 |
commit | 8d01b9cd70a67cdafd5b965a70420c3bd7fb3f82 (patch) | |
tree | 208e3bc33c220854d89d010e3abf720a2e62e546 /drivers/common/dpaax/dpaax_iova_table.h | |
parent | b63264c8342e6a1b6971c79550d2af2024b6a4de (diff) |
New upstream version 18.11-rc1upstream/18.11-rc1
Change-Id: Iaa71986dd6332e878d8f4bf493101b2bbc6313bb
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
Diffstat (limited to 'drivers/common/dpaax/dpaax_iova_table.h')
-rw-r--r-- | drivers/common/dpaax/dpaax_iova_table.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/common/dpaax/dpaax_iova_table.h b/drivers/common/dpaax/dpaax_iova_table.h new file mode 100644 index 00000000..138827e7 --- /dev/null +++ b/drivers/common/dpaax/dpaax_iova_table.h @@ -0,0 +1,105 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright 2018 NXP + */ + +#ifndef _DPAAX_IOVA_TABLE_H_ +#define _DPAAX_IOVA_TABLE_H_ + +#include <unistd.h> +#include <stdio.h> +#include <string.h> +#include <stdbool.h> +#include <stdlib.h> +#include <inttypes.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <dirent.h> +#include <fcntl.h> +#include <glob.h> +#include <errno.h> +#include <arpa/inet.h> + +#include <rte_eal.h> +#include <rte_branch_prediction.h> +#include <rte_memory.h> +#include <rte_malloc.h> + +struct dpaax_iovat_element { + phys_addr_t start; /**< Start address of block of physical pages */ + size_t len; /**< Difference of end-start for quick access */ + uint64_t *pages; /**< VA for each physical page in this block */ +}; + +struct dpaax_iova_table { + unsigned int count; /**< No. of blocks of contiguous physical pages */ + struct dpaax_iovat_element entries[0]; +}; + +/* Pointer to the table, which is common for DPAA/DPAA2 and only a single + * instance is required across net/crypto/event drivers. This table is + * populated iff devices are found on the bus. + */ +extern struct dpaax_iova_table *dpaax_iova_table_p; + +/* Device tree file for memory layout is named 'memory@<addr>' where the 'addr' + * is SoC dependent, or even Uboot fixup dependent. + */ +#define MEM_NODE_PATH_GLOB "/proc/device-tree/memory[@0-9]*/reg" +/* Device file should be multiple of 16 bytes, each containing 8 byte of addr + * and its length. Assuming max of 5 entries. + */ +#define MEM_NODE_FILE_LEN ((16 * 5) + 1) + +/* Table is made up of DPAAX_MEM_SPLIT elements for each contiguous zone. This + * helps avoid separate handling for cases where more than one size of hugepage + * is supported. + */ +#define DPAAX_MEM_SPLIT (1<<21) +#define DPAAX_MEM_SPLIT_MASK ~(DPAAX_MEM_SPLIT - 1) /**< Floor aligned */ +#define DPAAX_MEM_SPLIT_MASK_OFF (DPAAX_MEM_SPLIT - 1) /**< Offset */ + +/* APIs exposed */ +int dpaax_iova_table_populate(void); +void dpaax_iova_table_depopulate(void); +int dpaax_iova_table_update(phys_addr_t paddr, void *vaddr, size_t length); +void dpaax_iova_table_dump(void); + +static inline void *dpaax_iova_table_get_va(phys_addr_t paddr) __attribute__((hot)); + +static inline void * +dpaax_iova_table_get_va(phys_addr_t paddr) { + unsigned int i = 0, index; + void *vaddr = 0; + phys_addr_t paddr_align = paddr & DPAAX_MEM_SPLIT_MASK; + size_t offset = paddr & DPAAX_MEM_SPLIT_MASK_OFF; + struct dpaax_iovat_element *entry; + + if (unlikely(dpaax_iova_table_p == NULL)) + return NULL; + + entry = dpaax_iova_table_p->entries; + + do { + if (unlikely(i > dpaax_iova_table_p->count)) + break; + + if (paddr_align < entry[i].start) { + /* Incorrect paddr; Not in memory range */ + return NULL; + } + + if (paddr_align > (entry[i].start + entry[i].len)) { + i++; + continue; + } + + /* paddr > entry->start && paddr <= entry->(start+len) */ + index = (paddr_align - entry[i].start)/DPAAX_MEM_SPLIT; + vaddr = (void *)((uintptr_t)entry[i].pages[index] + offset); + break; + } while (1); + + return vaddr; +} + +#endif /* _DPAAX_IOVA_TABLE_H_ */ |