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linux_dsm_epyc7002/arch/s390/include/asm/pci_dma.h
Greg Kroah-Hartman b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license 
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:10:55 +01:00

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390_PCI_DMA_H
#define _ASM_S390_PCI_DMA_H
/* I/O Translation Anchor (IOTA) */
enum zpci_ioat_dtype {
ZPCI_IOTA_STO = 0,
ZPCI_IOTA_RTTO = 1,
ZPCI_IOTA_RSTO = 2,
ZPCI_IOTA_RFTO = 3,
ZPCI_IOTA_PFAA = 4,
ZPCI_IOTA_IOPFAA = 5,
ZPCI_IOTA_IOPTO = 7
};
#define ZPCI_IOTA_IOT_ENABLED 0x800UL
#define ZPCI_IOTA_DT_ST (ZPCI_IOTA_STO << 2)
#define ZPCI_IOTA_DT_RT (ZPCI_IOTA_RTTO << 2)
#define ZPCI_IOTA_DT_RS (ZPCI_IOTA_RSTO << 2)
#define ZPCI_IOTA_DT_RF (ZPCI_IOTA_RFTO << 2)
#define ZPCI_IOTA_DT_PF (ZPCI_IOTA_PFAA << 2)
#define ZPCI_IOTA_FS_4K 0
#define ZPCI_IOTA_FS_1M 1
#define ZPCI_IOTA_FS_2G 2
#define ZPCI_KEY (PAGE_DEFAULT_KEY << 5)
#define ZPCI_TABLE_SIZE_RT (1UL << 42)
#define ZPCI_IOTA_STO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_ST)
#define ZPCI_IOTA_RTTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RT)
#define ZPCI_IOTA_RSTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RS)
#define ZPCI_IOTA_RFTO_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_RF)
#define ZPCI_IOTA_RFAA_FLAG (ZPCI_IOTA_IOT_ENABLED | ZPCI_KEY | ZPCI_IOTA_DT_PF | ZPCI_IOTA_FS_2G)
/* I/O Region and segment tables */
#define ZPCI_INDEX_MASK 0x7ffUL
#define ZPCI_TABLE_TYPE_MASK 0xc
#define ZPCI_TABLE_TYPE_RFX 0xc
#define ZPCI_TABLE_TYPE_RSX 0x8
#define ZPCI_TABLE_TYPE_RTX 0x4
#define ZPCI_TABLE_TYPE_SX 0x0
#define ZPCI_TABLE_LEN_RFX 0x3
#define ZPCI_TABLE_LEN_RSX 0x3
#define ZPCI_TABLE_LEN_RTX 0x3
#define ZPCI_TABLE_OFFSET_MASK 0xc0
#define ZPCI_TABLE_SIZE 0x4000
#define ZPCI_TABLE_ALIGN ZPCI_TABLE_SIZE
#define ZPCI_TABLE_ENTRY_SIZE (sizeof(unsigned long))
#define ZPCI_TABLE_ENTRIES (ZPCI_TABLE_SIZE / ZPCI_TABLE_ENTRY_SIZE)
#define ZPCI_TABLE_BITS 11
#define ZPCI_PT_BITS 8
#define ZPCI_ST_SHIFT (ZPCI_PT_BITS + PAGE_SHIFT)
#define ZPCI_RT_SHIFT (ZPCI_ST_SHIFT + ZPCI_TABLE_BITS)
#define ZPCI_RTE_FLAG_MASK 0x3fffUL
#define ZPCI_RTE_ADDR_MASK (~ZPCI_RTE_FLAG_MASK)
#define ZPCI_STE_FLAG_MASK 0x7ffUL
#define ZPCI_STE_ADDR_MASK (~ZPCI_STE_FLAG_MASK)
/* I/O Page tables */
#define ZPCI_PTE_VALID_MASK 0x400
#define ZPCI_PTE_INVALID 0x400
#define ZPCI_PTE_VALID 0x000
#define ZPCI_PT_SIZE 0x800
#define ZPCI_PT_ALIGN ZPCI_PT_SIZE
#define ZPCI_PT_ENTRIES (ZPCI_PT_SIZE / ZPCI_TABLE_ENTRY_SIZE)
#define ZPCI_PT_MASK (ZPCI_PT_ENTRIES - 1)
#define ZPCI_PTE_FLAG_MASK 0xfffUL
#define ZPCI_PTE_ADDR_MASK (~ZPCI_PTE_FLAG_MASK)
/* Shared bits */
#define ZPCI_TABLE_VALID 0x00
#define ZPCI_TABLE_INVALID 0x20
#define ZPCI_TABLE_PROTECTED 0x200
#define ZPCI_TABLE_UNPROTECTED 0x000
#define ZPCI_TABLE_VALID_MASK 0x20
#define ZPCI_TABLE_PROT_MASK 0x200
static inline unsigned int calc_rtx(dma_addr_t ptr)
{
return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK;
}
static inline unsigned int calc_sx(dma_addr_t ptr)
{
return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK;
}
static inline unsigned int calc_px(dma_addr_t ptr)
{
return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK;
}
static inline void set_pt_pfaa(unsigned long *entry, void *pfaa)
{
*entry &= ZPCI_PTE_FLAG_MASK;
*entry |= ((unsigned long) pfaa & ZPCI_PTE_ADDR_MASK);
}
static inline void set_rt_sto(unsigned long *entry, void *sto)
{
*entry &= ZPCI_RTE_FLAG_MASK;
*entry |= ((unsigned long) sto & ZPCI_RTE_ADDR_MASK);
*entry |= ZPCI_TABLE_TYPE_RTX;
}
static inline void set_st_pto(unsigned long *entry, void *pto)
{
*entry &= ZPCI_STE_FLAG_MASK;
*entry |= ((unsigned long) pto & ZPCI_STE_ADDR_MASK);
*entry |= ZPCI_TABLE_TYPE_SX;
}
static inline void validate_rt_entry(unsigned long *entry)
{
*entry &= ~ZPCI_TABLE_VALID_MASK;
*entry &= ~ZPCI_TABLE_OFFSET_MASK;
*entry |= ZPCI_TABLE_VALID;
*entry |= ZPCI_TABLE_LEN_RTX;
}
static inline void validate_st_entry(unsigned long *entry)
{
*entry &= ~ZPCI_TABLE_VALID_MASK;
*entry |= ZPCI_TABLE_VALID;
}
static inline void invalidate_table_entry(unsigned long *entry)
{
*entry &= ~ZPCI_TABLE_VALID_MASK;
*entry |= ZPCI_TABLE_INVALID;
}
static inline void invalidate_pt_entry(unsigned long *entry)
{
WARN_ON_ONCE((*entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_INVALID);
*entry &= ~ZPCI_PTE_VALID_MASK;
*entry |= ZPCI_PTE_INVALID;
}
static inline void validate_pt_entry(unsigned long *entry)
{
WARN_ON_ONCE((*entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID);
*entry &= ~ZPCI_PTE_VALID_MASK;
*entry |= ZPCI_PTE_VALID;
}
static inline void entry_set_protected(unsigned long *entry)
{
*entry &= ~ZPCI_TABLE_PROT_MASK;
*entry |= ZPCI_TABLE_PROTECTED;
}
static inline void entry_clr_protected(unsigned long *entry)
{
*entry &= ~ZPCI_TABLE_PROT_MASK;
*entry |= ZPCI_TABLE_UNPROTECTED;
}
static inline int reg_entry_isvalid(unsigned long entry)
{
return (entry & ZPCI_TABLE_VALID_MASK) == ZPCI_TABLE_VALID;
}
static inline int pt_entry_isvalid(unsigned long entry)
{
return (entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID;
}
static inline int entry_isprotected(unsigned long entry)
{
return (entry & ZPCI_TABLE_PROT_MASK) == ZPCI_TABLE_PROTECTED;
}
static inline unsigned long *get_rt_sto(unsigned long entry)
{
return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX)
? (unsigned long *) (entry & ZPCI_RTE_ADDR_MASK)
: NULL;
}
static inline unsigned long *get_st_pto(unsigned long entry)
{
return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX)
? (unsigned long *) (entry & ZPCI_STE_ADDR_MASK)
: NULL;
}
/* Prototypes */
int zpci_dma_init_device(struct zpci_dev *);
void zpci_dma_exit_device(struct zpci_dev *);
void dma_free_seg_table(unsigned long);
unsigned long *dma_alloc_cpu_table(void);
void dma_cleanup_tables(unsigned long *);
unsigned long *dma_walk_cpu_trans(unsigned long *rto, dma_addr_t dma_addr);
void dma_update_cpu_trans(unsigned long *entry, void *page_addr, int flags);
#endif
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