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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
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>
136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* drivers/atm/eni.h - Efficient Networks ENI155P device driver declarations */
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/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
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#ifndef DRIVER_ATM_ENI_H
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#define DRIVER_ATM_ENI_H
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#include <linux/atm.h>
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#include <linux/atmdev.h>
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#include <linux/interrupt.h>
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#include <linux/sonet.h>
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#include <linux/skbuff.h>
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#include <linux/time.h>
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#include <linux/pci.h>
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#include <linux/spinlock.h>
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#include <linux/atomic.h>
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#include "midway.h"
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#define DEV_LABEL "eni"
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#define UBR_BUFFER (128*1024) /* UBR buffer size */
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#define RX_DMA_BUF 8 /* burst and skip a few things */
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#define TX_DMA_BUF 100 /* should be enough for 64 kB */
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#define DEFAULT_RX_MULT 300 /* max_sdu*3 */
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#define DEFAULT_TX_MULT 300 /* max_sdu*3 */
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#define ENI_ZEROES_SIZE 4 /* need that many DMA-able zero bytes */
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struct eni_free {
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void __iomem *start; /* counting in bytes */
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int order;
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};
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struct eni_tx {
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void __iomem *send; /* base, 0 if unused */
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int prescaler; /* shaping prescaler */
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int resolution; /* shaping divider */
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unsigned long tx_pos; /* current TX write position */
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unsigned long words; /* size of TX queue */
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int index; /* TX channel number */
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int reserved; /* reserved peak cell rate */
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int shaping; /* shaped peak cell rate */
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struct sk_buff_head backlog; /* queue of waiting TX buffers */
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};
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struct eni_vcc {
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int (*rx)(struct atm_vcc *vcc); /* RX function, NULL if none */
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void __iomem *recv; /* receive buffer */
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unsigned long words; /* its size in words */
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unsigned long descr; /* next descriptor (RX) */
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unsigned long rx_pos; /* current RX descriptor pos */
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struct eni_tx *tx; /* TXer, NULL if none */
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int rxing; /* number of pending PDUs */
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int servicing; /* number of waiting VCs (0 or 1) */
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int txing; /* number of pending TX bytes */
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ktime_t timestamp; /* for RX timing */
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struct atm_vcc *next; /* next pending RX */
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struct sk_buff *last; /* last PDU being DMAed (used to carry
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discard information) */
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};
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struct eni_dev {
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/*-------------------------------- spinlock */
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spinlock_t lock; /* sync with interrupt */
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struct tasklet_struct task; /* tasklet for interrupt work */
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u32 events; /* pending events */
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/*-------------------------------- base pointers into Midway address
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space */
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void __iomem *ioaddr;
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void __iomem *phy; /* PHY interface chip registers */
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void __iomem *reg; /* register base */
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void __iomem *ram; /* RAM base */
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void __iomem *vci; /* VCI table */
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void __iomem *rx_dma; /* RX DMA queue */
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void __iomem *tx_dma; /* TX DMA queue */
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void __iomem *service; /* service list */
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/*-------------------------------- TX part */
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struct eni_tx tx[NR_CHAN]; /* TX channels */
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struct eni_tx *ubr; /* UBR channel */
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struct sk_buff_head tx_queue; /* PDUs currently being TX DMAed*/
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wait_queue_head_t tx_wait; /* for close */
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int tx_bw; /* remaining bandwidth */
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u32 dma[TX_DMA_BUF*2]; /* DMA request scratch area */
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struct eni_zero { /* aligned "magic" zeroes */
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u32 *addr;
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dma_addr_t dma;
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} zero;
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int tx_mult; /* buffer size multiplier (percent) */
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/*-------------------------------- RX part */
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u32 serv_read; /* host service read index */
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struct atm_vcc *fast,*last_fast;/* queues of VCCs with pending PDUs */
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struct atm_vcc *slow,*last_slow;
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struct atm_vcc **rx_map; /* for fast lookups */
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struct sk_buff_head rx_queue; /* PDUs currently being RX-DMAed */
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wait_queue_head_t rx_wait; /* for close */
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int rx_mult; /* buffer size multiplier (percent) */
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/*-------------------------------- statistics */
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unsigned long lost; /* number of lost cells (RX) */
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/*-------------------------------- memory management */
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unsigned long base_diff; /* virtual-real base address */
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int free_len; /* free list length */
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struct eni_free *free_list; /* free list */
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int free_list_size; /* maximum size of free list */
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/*-------------------------------- ENI links */
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struct atm_dev *more; /* other ENI devices */
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/*-------------------------------- general information */
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int mem; /* RAM on board (in bytes) */
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int asic; /* PCI interface type, 0 for FPGA */
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unsigned int irq; /* IRQ */
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struct pci_dev *pci_dev; /* PCI stuff */
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};
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#define ENI_DEV(d) ((struct eni_dev *) (d)->dev_data)
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#define ENI_VCC(d) ((struct eni_vcc *) (d)->dev_data)
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struct eni_skb_prv {
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struct atm_skb_data _; /* reserved */
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unsigned long pos; /* position of next descriptor */
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int size; /* PDU size in reassembly buffer */
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dma_addr_t paddr; /* DMA handle */
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};
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#define ENI_PRV_SIZE(skb) (((struct eni_skb_prv *) (skb)->cb)->size)
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#define ENI_PRV_POS(skb) (((struct eni_skb_prv *) (skb)->cb)->pos)
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#define ENI_PRV_PADDR(skb) (((struct eni_skb_prv *) (skb)->cb)->paddr)
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#endif
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