- Linaro-mm-sig - lists.linaro.org

[GIT PULL] DMA-mapping framework updates for 3.4 (2nd try)

by Marek Szyprowski

Hi Linus, I would like to ask again for pulling the dma-mapping framework updates for v3.4. The following changes since commit c16fa4f2ad19908a47c63d8fa436a1178438c7e7: Linux 3.3 (2012-03-18 16:15:34 -0700) with the top-most commit 64d70fe5d3640e1a89790ed21120921278f8cb86 common: DMA-mapping: add NON-CONSISTENT attribute from the git repository at: git://git.linaro.org/people/mszyprowski/linux-dma-mapping.git for-linus This is an updated version of the patches which have been earlier rejected, see the following thread: https://lkml.org/lkml/2012/3/20/29 I hope I've fixed the issues pointed there: - collected a few more acks from arch maintainers, - resolved signed-off-by weirdness, - removed dependences between the patches. Short summary for the whole series: A few limitations have been identified in the current dma-mapping design and its implementations for various architectures. There exist more than one function for allocating and freeing the buffers: currently these 3 are used dma_{alloc, free}_coherent, dma_{alloc,free}_writecombine, dma_{alloc,free}_noncoherent. For most of the systems these calls are almost equivalent and can be interchanged. For others, especially the truly non-coherent ones (like ARM), the difference can be easily noticed in overall driver performance. Sadly not all architectures provide implementations for all of them, so the drivers might need to be adapted and cannot be easily shared between different architectures. The provided patches unify all these functions and hide the differences under the already existing dma attributes concept. The thread with more references is available here: http://www.spinics.net/lists/linux-sh/msg09777.html These patches are also a prerequisite for unifying DMA-mapping implementation on ARM architecture with the common one provided by dma_map_ops structure and extending it with IOMMU support. More information is available in the following thread: http://thread.gmane.org/gmane.linux.kernel.cross-arch/12819 More works on dma-mapping framework are planned, especially in the area of buffer sharing and managing the shared mappings (together with the recently introduced dma_buf interface: commit d15bd7ee445d0702ad801fdaece348fdb79e6581 "dma-buf: Introduce dma buffer sharing mechanism"). The patches in the current set introduce a new alloc/free methods (with support for memory attributes) in dma_map_ops structure, which will later replace dma_alloc_coherent and dma_alloc_writecombine functions. Thanks! Best regards Marek Szyprowski Samsung Poland R&D Center Patch summary: Andrzej Pietrasiewicz (8): X86 & IA64: adapt for dma_map_ops changes MIPS: adapt for dma_map_ops changes PowerPC: adapt for dma_map_ops changes SPARC: adapt for dma_map_ops changes Alpha: adapt for dma_map_ops changes SH: adapt for dma_map_ops changes Microblaze: adapt for dma_map_ops changes Unicore32: adapt for dma_map_ops changes Marek Szyprowski (6): common: dma-mapping: introduce generic alloc() and free() methods Hexagon: adapt for dma_map_ops changes common: dma-mapping: remove old alloc_coherent and free_coherent methods common: dma-mapping: introduce mmap method common: DMA-mapping: add WRITE_COMBINE attribute common: DMA-mapping: add NON-CONSISTENT attribute Documentation/DMA-attributes.txt | 18 ++++++++++++++++++ arch/alpha/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/alpha/kernel/pci-noop.c | 10 ++++++---- arch/alpha/kernel/pci_iommu.c | 10 ++++++---- arch/hexagon/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/hexagon/kernel/dma.c | 9 +++++---- arch/ia64/hp/common/sba_iommu.c | 11 ++++++----- arch/ia64/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/ia64/kernel/pci-swiotlb.c | 14 +++++++++++--- arch/ia64/sn/pci/pci_dma.c | 9 +++++---- arch/microblaze/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/microblaze/kernel/dma.c | 10 ++++++---- arch/mips/cavium-octeon/dma-octeon.c | 12 ++++++------ arch/mips/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/mips/mm/dma-default.c | 8 ++++---- arch/powerpc/include/asm/dma-mapping.h | 24 ++++++++++++++++-------- arch/powerpc/kernel/dma-iommu.c | 10 ++++++---- arch/powerpc/kernel/dma-swiotlb.c | 4 ++-- arch/powerpc/kernel/dma.c | 10 ++++++---- arch/powerpc/kernel/ibmebus.c | 10 ++++++---- arch/powerpc/kernel/vio.c | 14 ++++++++------ arch/powerpc/platforms/cell/iommu.c | 16 +++++++++------- arch/powerpc/platforms/ps3/system-bus.c | 13 +++++++------ arch/sh/include/asm/dma-mapping.h | 28 ++++++++++++++++++---------- arch/sh/kernel/dma-nommu.c | 4 ++-- arch/sh/mm/consistent.c | 6 ++++-- arch/sparc/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/sparc/kernel/iommu.c | 10 ++++++---- arch/sparc/kernel/ioport.c | 18 ++++++++++-------- arch/sparc/kernel/pci_sun4v.c | 9 +++++---- arch/unicore32/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/unicore32/mm/dma-swiotlb.c | 18 ++++++++++++++++-- arch/x86/include/asm/dma-mapping.h | 26 ++++++++++++++++---------- arch/x86/kernel/amd_gart_64.c | 11 ++++++----- arch/x86/kernel/pci-calgary_64.c | 9 +++++---- arch/x86/kernel/pci-dma.c | 3 ++- arch/x86/kernel/pci-nommu.c | 6 +++--- arch/x86/kernel/pci-swiotlb.c | 17 +++++++++++++---- arch/x86/xen/pci-swiotlb-xen.c | 4 ++-- drivers/iommu/amd_iommu.c | 10 ++++++---- drivers/iommu/intel-iommu.c | 9 +++++---- drivers/xen/swiotlb-xen.c | 5 +++-- include/linux/dma-attrs.h | 2 ++ include/linux/dma-mapping.h | 13 +++++++++---- include/xen/swiotlb-xen.h | 6 ++++-- 45 files changed, 354 insertions(+), 198 deletions(-)

13 years, 8 months

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如何量化管理及激励人才

by 8+1绩效量化

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13 years, 8 months

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劳动法★社保法★工伤险

by 佛山、中山、江门

《劳动合同法》、《社会保险法》、《工伤保险条例》实操应对策略与有效调岗调薪、解雇辞退及违纪问题员工处理技巧 ======================================================================================== 开课时间：2012年4月6-7日（周五-周六）广州天豪大酒店开课时间：2012年4月12-13日（周四-周五）佛山金湖酒店开课时间：2012年4月18-19日（周三-周四）中山石岐阳光商务酒店开课时间：2012年4月25-26日（周三-周四）江门华苑酒店培训对象：董事长、总经理、副总经理、人力资源总监、经理、专员及相关工作人员、部门经理等收费标准：￥2500元 /人（含资料费、会务费、午餐费）资格证书费：高级￥800元/人(参加认证考试的学员须交纳此费用，不参加认证考试的学员无须交纳) 备注： 1. 凡参加认证的学员，在培训结束参加考试合格者由IOCL<<国际职业认证标准联合会>>颁发<<人力资源管理师>>国际国内中英文版双职业资格证书，（国际国内认证／全球通行／雇主认可／官方网上查询）； 2．凡参加认证的学员须提交本人身份证号码及大一寸蓝底电子版数码照片； 3．课程结束后20天内将证书快递寄给学员。 ======================================================================================== 课程大纲： ★ 一、劳动合同订立、变更技巧 1、用人单位不使用劳动部门的合同范本自行拟定劳动合同文本是否有效？劳动合同未经劳动部门备案是否有效？ 2、如果劳动者借故拖延或拒绝签订劳动合同的，用人单位如何应对？ 3、劳动合同期满，用人单继续留用劳动者，但未与劳动者续订书面劳动合同的，是否也需支付两倍工资？ 4、用人单位与劳动者在用工前订立劳动合同的，在尚未用工期间，用人单位解除劳动合同，是否需支付经济补偿？ 5、在校学生与用人单位是否需要建立劳动关系？ 6、劳务关系与劳动关系如何区别，能否把劳动关系转化为劳务关系？ 7、什么时候为最佳时间，签署劳动合同？ 8、签订了劳动合同，是否等于难以解雇员工？ 9、不签劳动合同，是否等于无须缴纳社会保险？ 10、法律禁止2次约定试用期，那么劳动合同期限和试用期限该如何约定？ 11、用人单位收购其他组织时，如何与被接收的员工签订、变更劳动合同？ 12、员工达到法定退休年龄而继续聘用的，是继续签订劳动合同还是签订其他协议？ 13、合同的关键核心条款及操作技巧 (1)企业安排员工从事劳动合同约定工作内容以外的任务，属于单方违约，该如何约定工作岗位 /工作内容，以化解违约侵权带来的法律风险？ (2)如何约定工作岗位及工作内容，以便企业根据实际情况调整员工的工作内容及单方变更其工作岗位？ (3)如何约定劳动报酬，以避免约定不明确带来的风险？ (4)如何约定工资总额，以合法降低经济补偿的基数？ (5)如何约定薪酬结构，以利于企业灵活地调整工资？ (6)《劳动合同变更通知书》应如何设计？ (7)《劳动合同变更协议书》应如何设计？ ★ 二、如何有效调岗调薪 1、企业通常根据经营需要而调整员工的岗位或地点，但是员工可提出被迫解除并索赔经济补偿，企业日常中该如何做，才能化解风险或避免案件败诉？ 2、劳动合同约定的岗位实际上发生变化，但没有办理相关手续，员工到新岗位一段时间后，却要求恢复到原岗位，往往成立，那么企业该如何抗辩、该如何预防？ 3、绩效目标不合法合理的，往往不能作为衡量劳动者是否“胜任工作”的依据，企业该怎样设定绩效目标，才能作为衡量标准？ 4、即使企业能证明劳动者 “不胜任工作”，但是在之后的调岗调薪争议中还是被认定单方非法变更劳动合同，企业败诉，为什么？企业该如何防范？ 5、劳动者对绩效目标不确认，是否意味着该目标无效？如果必须经劳动者确认才生效，那么企业的日常管理将何去何从？ 6、员工认同绩效考核结果，但是企业在“基于不胜任工作而调岗调薪、解雇辞退”的案件中还是败诉，那么企业该如何抗辩或日常中怎样做，才能避免败诉风险？ 7、企业根据绩效考核结果扣减员工绩效奖金，很多时候被认定非法克扣工资，企业该如何抗辩或日常中怎样做，才能化解风险或避免败诉？ 8、员工不胜任工作，企业能否调整其岗位，调岗后能否单方降低其薪酬？如何操作，才能调岗降薪？ 9、假设女员工固定月薪为3000元，浮动月薪为2000元，过去12个月的平均工资为4800元，怀孕期间究竟该按什么标准支付，公司希望按3000元，员工希望按5000元，仲裁结果可能是4800元；企业该如何控制用人成本？ 10、女职工休产假完毕后，往往原岗位已经有其他同事负责，女职工往往不接受新岗位，为此发生劳动争议，企业该如何做，才能化解败诉的风险？ ★ 三、如何有效解雇辞退 1、实行末位淘汰制，以末位排名为由解雇员工，仲裁机构往往认定企业非法解雇员工，那么企业日常中该如何做，才避免案件败诉，避免支付经济补偿或赔偿金？ 2、以“组织架构调整，无合适岗位安排”为由解雇员工，是非常符合常理的做法，但往往被仲裁机构认定企业非法解雇，企业该如何做，才避免案件败诉？ 3、企业以“经济性裁员”名义解雇员工，是非常符合常理的做法，往往被认定非法解雇，企业该如何操作？对“经济型裁员”作出规定的法律文件到底有哪些？ 4、企业与劳动者协商解除劳动合同并书面约定支付适当的经济补偿数额，事后劳动者追讨经济补偿的差额部分，仲裁机构很可能支持劳动者的诉求，企业日常中该如何创制、收集证据，才避免案件败诉？ 5、培训服务期未到期，而劳动合同到期，企业终止劳动合同的，仲裁期间往往被认定属于提前非法解除劳动合同，企业该如何做，才避免案件败诉？ 6、员工未提前30日通知企业即自行离职，是否构成劳动者违法解除？企业该如何做，才能降低风险成本？对于劳动者的辞职环节，有哪些必须注意的风险控制点？ 7、劳动合同到期后，经常出现该终止的忘记办理终止手续，该续签的忘记办理续签手续，经过一段时间后企业才提出补办相关手续，但是员工却提出赔偿要求，企业风险非常大；那么企业该如何做，才确保规避上述败诉风险？ 8、解除劳动合同前未通知及征求工会的意见，是否构成非法解除？ 9、《解除劳动合同通知书》如果表述不当，往往成为劳动者打赢官司的有力证据，企业该如何书写，才避免案件败诉而承担法律责任？ 10、哪些情形下属于非法解雇员工，须承担哪些法律责任，是承担1年1个月工资的经济补偿还是1年2个月工资的赔偿金，代通知金是否要承担，劳动者能否要求恢复劳动关系？ ★ 四、基本养老保险新规定与旧法规定的异同及亮点分析 1、基本养老金是否可以提前提取 2、个人跨地区就业可以随个人转移，又是如何领取的 3、办理职工特殊工种提前退休时应注意哪些问题 4、因提前退休引发劳动争议的处理方法与风险防范手段 5、职工退休后与企业的关系如何处理 6、当前养老保险实践中的矛盾与疑难问题处理 7、职工档案丢失纠纷应如何处理用人单位应承担哪些法律责任 8、个人依法享受社会保险待遇，有权监督本单位为其缴费情况 ★ 五、企业社会保险筹划策略 1、社会保险法关于保险费征缴有哪些变化 2、社会保险基金剖析 3、社会保险法对企业实操经办社会保险有哪些变化 4、社会保险监督解读与企业主意事项 5、外国人在中国境内就业的，参照本法规定参加社会保？如何享受？ 6、社会保险法颁布对企业规章制度设立的影响。 7、在新的《社会保险法》下如何节约社保成本与企业用工成本？ ★ 六、工伤保险与企业不缴、欠缴工伤保险费的新风险 1、员工缴纳了农村合作医疗，并且能够提供证明，企业还需为其缴纳城镇职工基本医疗保险吗 2、如何理解工伤保险的无过错责任原则 3、企业能否追究工伤职工的过失赔偿责任 4、参加单位组织的体育活动受伤能认定为工伤吗 5、无照驾驶与驾驶无照车辆受伤怎么办如何认定职工的醉酒行为 6、“认定工伤”、“视同工伤”、“不认定工伤”的法律界定 7、哪些工伤待遇由企业支付哪些工伤待遇由经办机构支付 8、工伤职工超过规定医疗期如何处理 9、单位能用商业保险赔偿职工工伤待遇吗 10、单位对劳动能力等级鉴定不服怎么办 11、发生工伤后，企业能否与伤者私了？ 12、员工使用假身份证，社保拒赔，企业应怎样担责？ 13、对工伤员工出院后“泡工伤”，企业该怎样处理？ 14、工伤保险的各种待遇计发基数――“本人工资”是如何确定的？ 15、员工违反操作规程受伤是否工伤？企业可否对其予以处罚？ 16、投保了团体人身意外伤害险，可否不再购买工伤保险？ ★ 七、如何有效处理违纪违规员工 1、处分、解雇劳动者，往往由于劳动者拒绝签收该通知书而导致企业的处分、解雇行为被认定为无效或非法行为，那么企业在日常中该如何做，才避免案件败诉？ 2、劳动者欺诈应聘，事后被企业解雇，在仲裁期间，劳动者可能作出让企业措手不及的抗辩观点，企业该如何回应或者在日常中采取哪些防范策略？ 3、对于违纪违规的恶意问题员工，他们往往拒绝提交《检讨书》或否认违纪违规的事实，企业该如何创制、收集证据，才避免案件败诉而承担法律责任？ 4、如何进行违纪员工的事实调查、证据固定，对于违纪员工，部门经理应注意哪些日常细节问题？? 5、对于违纪员工，事发后什么时间处理，如何书写《违纪违规处分通知书》？ 6、怎样理解“严重违反用人单位的规章制度的”，如何在《惩罚条例》中详细明确违纪违规的 “一般违反”、“较重违反”及“严重违反”？? 7、直线部门经理擅自口头辞退员工，仲裁机构往往认定企业非法解雇员工，那么企业日常中该如何做，才避免案件败诉，避免直线经理越权处分员工？ 8、劳动者不辞而别、无故旷工工，却主张被企业口头解雇，往往得到仲裁机构的支持，那么企业日常中该如何做，才避免案件败诉？ 9、如何界定“重大损害”，“重大损害”是否必须体现为造成直接的经济损失？ 10、采用“录音录象”方式创制、保留的证据，法院是否采信，企业内部OA系统或ERP系统上的资料能否作为证据使用，电子邮件、手机短信能否作为证据使用？ ★ 八、企业规章制度撰写技巧 1、劳动合同法时代规章制度的重要性 2、企业规章制度的必备内容 3、规章制度在人力资源管理中的地位 4、企业制度建设常见问题 5、规章制度的现状 6、制度制定和执行的重点和难点 7、企业规章制度与劳动合同、集体合同的效力关系和适用关系 8、劳动合同法对规章制度的影响 9、规章制度能为企业带来什么？ 10、如何预防规章制度违反法律法规带来的风险？ 11、规章制度制定程序应对措施 12、企业规章制度的风险防范 13、员工手册的主要内容及制定原则、撰写方法与技巧和注意事项 14、招聘制度的主要内容及招聘管理的原则、流程和注意事项 15、劳动合同管理制度的主要内容及制定原则、撰写方法与技巧和注意事项 16、工资支付制度的主要内容及制定原则、撰写方法与技巧和注意事项 17、奖惩制度的主要内容及制定原则、撰写方法与技巧和注意事项 18、考勤与加班制度的主要内容及制定原则、撰写方法与技巧和注意事项 19、如何有效运用企业规章制度对员工加强管理？特别是对问题员工和高层员工、关键岗位员工的管理？ 20、企业以员工违反规章制度为由解除劳动合同败诉原因分析 21、规章制度能否规定对员工进行经济处罚？ 22、法院对规章制度的效力的认定 ======================================================================================== ★ 老师介绍: 梁伟权之诚老师国内知名劳资专家国家高级人力资源管理师国家人力资源法务咨询师中国管理研究院劳资关系管理研究所首席研究员中国劳动关系在线首席顾问国家人社部人力资源法务咨询师考证培训讲师中国人事法务协会高级顾问广州人事局国际人才交流协会常务理事广州市劳动保障法律监督员梁老师精通劳动法规，熟悉人力资源管理，现任北鸣学习机构首席顾问、签约讲师。梁老师在全国各地巡讲“劳动法相关课程”，受益企业达20000多家，真实案例教学，将枯燥的劳动政策法规溶入实际管理当中；学员参与讨论、互动，课程生动有趣，深入浅出，让学员迅速学以致用。深受广大企业管理者、人力资源从业者的好评。梁老师长期担任企业的人力资源管理顾问和法律顾问，专门从事人力资源管理与劳动争议诉讼及劳动法律研究工作，对于企业管理过程中的劳动用工风险有深刻的了解，处理各类劳动纠纷案件1000余件（包括个人、企业），涉及北京、天津、浙江、江苏、上海、广东、广西、山东、四川、重庆、湖南、湖北、福建、海南、辽南、云南、江西等地，对各地劳动地方法规有较深的了解，对劳动法有很深的理论研究和丰富的实战经验，接受过广东电视珠江台、广州电视台、珠江经济广播电台和《广州日报等多家媒体的采访;最近《应对劳动争议爆发期》一文发表在《南风窗》杂志2009年第5期;较全面的总结了我国劳动管理方面存在的一些问题,特别对引入第三方独立机构参与协调的想法，具有较强的现实意义与指导作用,引起业界广泛关注。梁老师顾问或服务过的客户有：华北油田管理局、中国水利电力物资公司、东风日产、万宝冷机集团、金羚洗衣机集团、南方电网、长大公路集团、长宏公路、广铝集团、永红服装配件集团、、广州日用五金、联动科技、创颖实业、奥地利索恩照明、新加坡赫比电子、新加坡诺卫环保、美国溢隆实业、台湾崧尉股份、爱创域（香港）公司、上海正英、北京瑞升、信和光栅、台湾先力光电、美西乐士、卡尔诺网络、满堂红(中国)地产、中地行地产、广州邮政、全球通大酒店、家园连锁酒店、娇妍日用品、芙蓉坊连锁、二天堂连锁、广州酒类专卖连锁、大千钢琴、欢乐反斗城玩具、点石珠宝、年青人眼镜量贩连锁、国汇保险、大同搬屋、金达航运等。 ======================================================================================== 主办单位: 北鸣企业管理咨询有限公司官方报名热线:020 - 3966 5571 李先生 ======================================================================================== ▲请将以下报名表内容填写后发送到：TT39665571(a)163.xn--com-s18docw0dhtoqp48a05g9vuvzhmss763etxf01o3s3g! 　　　　　　　　　　　报名回执表　　我单位共_______人报名参加《《劳动合同法》、《社会保险法》、《工伤保险条例》》时间：2012年4月6-7日（周五-周六）广州天豪大酒店 □ 时间：2012年4月12-13日（周四-周五）佛山金湖酒店 □ 时间：2012年4月18-19日（周三-周四）中山石岐阳光商务酒店 □ 时间：2012年4月25-26日（周三-周四）江门华苑酒店 □ 单位名称：_____________________________________________ 联系人：_____________ 联系电话：_______________ 手机：_______________ 图文传真：_____________ 电子信箱：_____________________________________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 总费用：___________ 元整。付款方式：□ 现金　□ 支票　□ 转帐　　（请选择打“√”）备注: 1.请您把报名回执认真填好后回传我司，为确保您报名无误,请您再次电话确认! 2.本课程可根据企业需要组织内训。

13 years, 8 months

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2012疯狂销售▲团队建设

by 高绩效团队

2012疯狂销售团队建设与人员考核激励时间地点：3月30-3月31日上海 4月7-8日深圳时间地点：5月12-13日深圳 5月23-24日北京 5月25-26日上海课程费用：2800元/人（包括资料费、午餐及上下午茶点等） ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 课程背景在当今激烈的商战中，销售人员好比是“士兵”，直接影响到企业的安危。作为“将”“帅”，您遇到过这些情况之一二？ 1) 为什么销售人员总是先看拿多少钱，再看办多少事？? 2) 为什么销售人员总觉得干的多，拿的少？? 3) 为什么销售拿了钱还不守规矩？? 4) 为什么发了钱仍然没有积极性？ 5) 企图心不强，不愿做，不求吃好，只求有饱 6) 员工被处罚后总是抱怨：“这个命令根本不切合实际”“这事不是我干的”、 7) 如何应对员工为自己开脱责任的借口，员工大错不犯小错不断怎么办？ 8) 执行力差强人意，计划不如变化快 9) 人员流失率高，流走的是“精兵强将”，留下的是“散兵游勇” 10) 抢单、卖单、转单、炒单时有发生，公说公有理，婆说婆有理 11) 合作意识不强，你不理我，我也不理你。 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 课程目的培训价值：如果您的销售队伍中有一个业务员有一个月不努力，则您将至少损失2000元工资加费用，如果您激励了您的团队，多一个人努力，则您可能多挣20000元。课程目的： A) 了解销售主管的角色和职责。 B) 学习如何优化销售队伍的工作效率。 C) 建立销售管理机制，提升销售业绩。 D) 如何让销售明白什么情况下可以多拿钱？? E) 如何使激励不仅控制结果，还能控制过程？? F) 如何坚持正确的价值导向，杜绝讨价还价？? G) 如何建立科学的销售绩效考核系统？ H) 建立成功的销售队伍和部门 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 课程大纲第一篇：我是谁？我该怎么做？我如何做更有效？---销售主管的定位与角色: 讨论：“问世间销售何做？直教人难以摸索”---营销主管的九大感叹分享：“兵王”转换成销售经理的角色转换之心态转换案例研讨：增加目标任务量找事：给他找毛病挖坑：把他调到其他区域干掉分享：目标任务量的设定目标设定5项原则举例： “三够原则” 够懒-够黑--够吝啬--销售经理角色转换朝会---晚会制度销售管理5要素第二篇：业绩才是硬道理---销售团队建设与管理分享：把干毛巾拎出水来讨论：销售队伍规模大，业绩就高吗？如何瓜分销售王国？--销售区域划分案例分析：小丽的故事分享：业绩改进计划PIP 利用关键指标设置控制提升业绩；以专业化营销指引销售方向（STP）善于整合及包装武器，提高团队作战能力（提炼出高效的销售套路及技巧）第三篇：销售团队的辅导与教练――成为一个超级教练分享：发展才是硬道理--成功的团队留住成功的人讨论：火眼睛睛识人--悟空、八戒、沙僧、唐僧--你要啥样的人？案例：筛选、测试、面试、选择具体操作范本：职务说明、任职考评案例：晋升条件----升官就发财故事：前有标兵，后有追兵流程化运转――让大家行动起来--建立互助与检查机制言传身教--示范为主协同拜访--实地观察共同分享――复制成功案例：广东某企业培训宝典演练：鱼缸式实战训练稚鹰归队实战演练第四篇：管要管得有理有效----建立销售管理机制即时跟进与支持思考：销售主管管什么--监控制度不是用来管人的而是用来吓人的案例分析与讨论：销售流程管理的典型三大问题案例分析与讨论：制度监控要点销售流程有效控制和管理销售内控和审计体系讨论：编织你的蜘蛛网---实施业务跟进及支持体系的操作及方法有效沟通――恋爱是谈出来的分析：为什么你要离开我？第五篇：销售团队的强心针---激励技巧测试：性格测试创造理想环境――两手都要抓、两手都要硬--有效命令与奖罚艺术案例：命令要合理理想环境之二奖励是最主要的手段――预先明确化案例：销售人员的的典型薪酬福利方案故事：谁出鱼翅钱理想环境之三让人们自我督促――惩罚技巧案例：什么时候会有冤气？你的产品买四送一理想环境之四----家里最好案例：销售团队办公室理想环境之五使每个人都有好心态――工作快乐化演练：自我激励分享：5大挑战激励第六篇：销售活动分析---销售绩效管理和评估和有效沟通激励游戏：钉子思考：绩效管理三大方面和流程案例：总经理的困惑----吃老本? 蛋糕切的大小不一? 片面追求销售额，牺牲了利润? 梯队断层危机? 请你不要离开我？分享：定量销售指标销售的532模型当前绩效考评中存在的局限性有效的绩效考评系统的流程和标准如何有效的控制过程与结果三种典型的绩效考评模式分享：经过各种形式的沟通激励确定关键业绩指标（KPI）表格：销售活动管理报表经营管理分析会议第七篇：刺激销售业绩增长---销售绩效考核讨论：纯粹薪水制度纯粹佣金制度薪水加佣金制度薪水加佣金加奖金制度特别奖励制度案例：佣金计算方法范本累进比例举例分享：销售人员薪酬制度的建立制度确立5大原则：一视同仁，无歧视、激励性、灵活性、稳定性、控制性销售人员薪酬水平确立范本：销售部分考核示范表指标第八篇：现场模拟――解决实际问题讨论：各个公司销售模式、政策介绍：客户也需要爱；顾客就是上帝；武装到牙齿练习：冰海沉船答疑 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 讲师介绍张嫣老师国际职业培训师协会认证讲师、工商管理硕士、清华大学、中山大学客座讲师。历任跨国公司、港资集团公司、DELL（中国）销售经理、大区经理等职位、专职从事营销工作近十年，从一线业务人员到营销管理工作，成功积累和总结了丰富的市场营销精粹经验，并先后在各家企业取得了优秀业绩。其培训课程针对企业实际问题而设计，善于培养学员的实务解决能力；其培训注重学员现场吸收，便于学员在实际工作中有效运用，赢得企业与学员的好评。所授课程：《电话销售技巧》、《客户服务满意度、客户服务技巧提升》、《销售服务礼仪》、《职业形象塑造与现代商务礼仪》、《如何有效处理客户投诉》、《大客户销售技巧》、《销售团队建设与销售人员考核激励》等培训过百场，授课特色：给你方法，给你技巧，给你实战演练的机会；你说，你做，大家来点，讲师来评。作为实战讲师，张老师的培训将大量采用特色讲授、情景案例、角色扮演及游戏等形式，注重理论技巧与企业的实际情况相结合，强调学员心得交流及经验分享，能启发和引导学员思路，并在寓教于乐的参与氛围中使学员逐渐改变观念、提升销售技能与个人修养。服务过的部分企业：SOHO中国、艾默生、华安集团、金蝶软件、ABB、BP液化石油、上海可口可乐、上海电信、中国移动、康佳集团、友邦保险、北京建行、贵州建行、四川电信、平安保险、现代计算机、东莞移动、深圳招商证券、上海华实传媒、中国仪器集团进出口有限公司、广州仁爱医院、春生堂化妆品、天平汽车保险股份有限公司、富菱化工、华美达机械制造、亿鑫汽车销售、美国亿柏国际公司、七匹狼服饰、山东九阳小家电、联发软件科技、艾利、联想电脑、上海电气网络科技、皇加力（中国）商业有限公司、上海永升广告传媒、上海良会贸易、IBM长城、中联医药集团、TCL集团、中铁快运集团、青岛啤酒、中通远洋物流集团、三九医药、海王药业、肯德基、罗兰化妆品、托博正畸器械、科宝仪器仪表、法泰电器、新城建设集团、上海理光、上海西部集团、信息产业集团、飞利浦照明、大唐电讯海南椰树集团、上海震旦集团、红蜻蜓集团、南京红太阳集团、杭萧钢构、豪爵摩托、小天鹅、LG蝶妆、新疆德隆屯河股份、新疆八钢、康恩贝保健食品、澳医保灵、浙江李宁、桓仁药业等百余家企业提供培训及咨询服务。 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 会务组织：诺思凯企业管理咨询有限公司深圳报名热线：０７５５- - ６１２８２５７１北京报名热线: ０１０- - ８１６７５２６７上海报名热线: ０２１- - ５１８７３７０８客服工作 Q Q : １０７８８６１１１８ ▲请将以下报名表内容填写后发送到：chinasypx(a)foxmail.xn--com-s18docw0dhtoqp48a05g9vuvzhmss763etxf01o3s3g! ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 　　　　　　　　　　　　　报名回执表　　我单位共_______人报名参加 2011___年____月___日在 ______ 举办的：　　　　　　　　“2012疯狂销售团队建设与人员考核激励” 单位名称：_____________________________________________ 联系人：_____________ 联系电话：_______________ 手机：_______________ 图文传真：_____________ 电子信箱：_____________________________________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 总费用：___________ 元整。付款方式：□ 现金　□ 支票　□ 转帐　　（请选择打“√”）备注: 1.请您把报名回执认真填好后回传我司，为确保您报名无误,请您再次电话确认! 2.本课程可根据企业需要组织内训。

13 years, 8 months

1
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[RFCv2 PATCH 0/9] Integration of videobuf2 with dmabuf

by Tomasz Stanislawski

Hello everyone, This patchset is an incremental patch to patchset created by Sumit Semwal [1]. The patches are dedicated to help find a better solution for support of buffer sharing by V4L2 API. It is expected to start discussion on the final installment for dma-buf in vb2-dma-contig allocator. Current version of the patches contain little documentation. It is going to be fixed after achieving consensus about design for buffer exporting. Moreover the API between vb2-core and the allocator should be revised. The patches were successfully tested to cooperate with EXYNOS DRM driver using DMABUF mechanism. Please note, that the amount of changes to vb2-dma-contig.c was significant making the difference patch very difficult to read. The patchset makes use of dma_get_pages extension for DMA API, which is posted on a top of dma-mapping patches by Marek Szyprowski [4] [5]. The tree, that contains all needed patches, can be found here [6]. v2: - extended VIDIOC_EXPBUF argument from integer memoffset to struct v4l2_exportbuffer - added patch that breaks DMABUF spec on (un)map_atachment callcacks but allows to work with existing implementation of DMABUF prime in DRM - all dma-contig code refactoring patches were squashed - bugfixes v1: List of changes since [1]. - support for DMA api extension dma_get_pages, the function is used to retrieve pages used to create DMA mapping. - small fixes/code cleanup to videobuf2 - added prepare and finish callbacks to vb2 allocators, it is used keep consistency between dma-cpu acess to the memory (by Marek Szyprowski) - support for exporting of DMABUF buffer in V4L2 and Videobuf2, originated from [3]. - support for dma-buf exporting in vb2-dma-contig allocator - support for DMABUF for s5p-tv and s5p-fimc (capture interface) drivers, originated from [3] - changed handling for userptr buffers (by Marek Szyprowski, Andrzej Pietrasiewicz) - let mmap method to use dma_mmap_writecombine call (by Marek Szyprowski) [1] http://thread.gmane.org/gmane.linux.drivers.video-input-infrastructure/4296… [2] https://lkml.org/lkml/2011/12/26/29 [3] http://thread.gmane.org/gmane.linux.drivers.video-input-infrastructure/3635… [4] http://thread.gmane.org/gmane.linux.kernel.cross-arch/12819 [5] http://git.infradead.org/users/kmpark/linux-2.6-samsung/shortlog/refs/heads… [6] http://git.infradead.org/users/kmpark/linux-2.6-samsung/shortlog/refs/heads… Sumit Semwal (1): v4l: vb2: Add dma-contig allocator as dma_buf user Tomasz Stanislawski (8): v4l: vb2: fixes for DMABUF support v4l: vb2-dma-contig: update and code refactoring v4l: add buffer exporting via dmabuf v4l: vb2: add buffer exporting via dmabuf v4l: vb2-dma-contig: add support for DMABUF exporting v4l: vb2-dma-contig: change map/unmap behaviour v4l: fimc: integrate capture i-face with dmabuf v4l: s5p-tv: mixer: integrate with dmabuf drivers/media/video/Kconfig | 1 + drivers/media/video/s5p-fimc/fimc-capture.c | 11 +- drivers/media/video/s5p-tv/Kconfig | 1 + drivers/media/video/s5p-tv/mixer_video.c | 12 +- drivers/media/video/v4l2-compat-ioctl32.c | 1 + drivers/media/video/v4l2-ioctl.c | 11 + drivers/media/video/videobuf2-core.c | 88 +++- drivers/media/video/videobuf2-dma-contig.c | 717 ++++++++++++++++++++++++--- include/linux/videodev2.h | 20 + include/media/v4l2-ioctl.h | 2 + include/media/videobuf2-core.h | 8 +- 11 files changed, 779 insertions(+), 93 deletions(-) -- 1.7.5.4

13 years, 8 months

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[PULL REQUEST] DMA-mapping framework redesign preparation patches

by Marek Szyprowski

Hi Stephen, Our patches with DMA-mapping framework redesign proposal have been hanging for over a month with just a few comments. We would like to go further in the development, but first I would like to ask You to give them a try in the linux-next kernel. For everyone interested in this patch series, here is the relevant thread: https://lkml.org/lkml/2011/12/23/97 If there are any problems with our git tree, please contact Marek Szyprowski <m.szyprowski(a)samsung.com> or alternatively Kyungmin Park <kyungmin.park(a)samsung.com>. The following changes since commit 62aa2b537c6f5957afd98e29f96897419ed5ebab: Linux 3.3-rc2 (2012-01-31 13:31:54 -0800) are available in the git repository at: git://git.infradead.org/users/kmpark/linux-samsung dma-mapping-next Andrzej Pietrasiewicz (9): X86: adapt for dma_map_ops changes MIPS: adapt for dma_map_ops changes PowerPC: adapt for dma_map_ops changes IA64: adapt for dma_map_ops changes SPARC: adapt for dma_map_ops changes Alpha: adapt for dma_map_ops changes SH: adapt for dma_map_ops changes Microblaze: adapt for dma_map_ops changes Unicore32: adapt for dma_map_ops changes Marek Szyprowski (5): common: dma-mapping: introduce alloc_attrs and free_attrs methods common: dma-mapping: remove old alloc_coherent and free_coherent methods common: dma-mapping: introduce mmap method common: DMA-mapping: add WRITE_COMBINE attribute common: DMA-mapping: add NON-CONSISTENT attribute Documentation/DMA-attributes.txt | 19 +++++++++++++++++++ arch/alpha/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/alpha/kernel/pci-noop.c | 10 ++++++---- arch/alpha/kernel/pci_iommu.c | 10 ++++++---- arch/ia64/hp/common/sba_iommu.c | 11 ++++++----- arch/ia64/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/ia64/kernel/pci-swiotlb.c | 9 +++++---- arch/ia64/sn/pci/pci_dma.c | 9 +++++---- arch/microblaze/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/microblaze/kernel/dma.c | 10 ++++++---- arch/mips/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/mips/mm/dma-default.c | 8 ++++---- arch/powerpc/include/asm/dma-mapping.h | 24 ++++++++++++++++-------- arch/powerpc/kernel/dma-iommu.c | 10 ++++++---- arch/powerpc/kernel/dma-swiotlb.c | 4 ++-- arch/powerpc/kernel/dma.c | 10 ++++++---- arch/powerpc/kernel/ibmebus.c | 10 ++++++---- arch/powerpc/platforms/cell/iommu.c | 16 +++++++++------- arch/powerpc/platforms/ps3/system-bus.c | 13 +++++++------ arch/sh/include/asm/dma-mapping.h | 28 ++++++++++++++++++---------- arch/sh/kernel/dma-nommu.c | 4 ++-- arch/sh/mm/consistent.c | 6 ++++-- arch/sparc/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/sparc/kernel/iommu.c | 10 ++++++---- arch/sparc/kernel/ioport.c | 18 ++++++++++-------- arch/sparc/kernel/pci_sun4v.c | 9 +++++---- arch/unicore32/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/unicore32/mm/dma-swiotlb.c | 4 ++-- arch/x86/include/asm/dma-mapping.h | 26 ++++++++++++++++---------- arch/x86/kernel/amd_gart_64.c | 11 ++++++----- arch/x86/kernel/pci-calgary_64.c | 9 +++++---- arch/x86/kernel/pci-dma.c | 3 ++- arch/x86/kernel/pci-nommu.c | 6 +++--- arch/x86/kernel/pci-swiotlb.c | 12 +++++++----- arch/x86/xen/pci-swiotlb-xen.c | 4 ++-- drivers/iommu/amd_iommu.c | 10 ++++++---- drivers/iommu/intel-iommu.c | 9 +++++---- drivers/xen/swiotlb-xen.c | 5 +++-- include/linux/dma-attrs.h | 2 ++ include/linux/dma-mapping.h | 13 +++++++++---- include/linux/swiotlb.h | 6 ++++-- include/xen/swiotlb-xen.h | 6 ++++-- lib/swiotlb.c | 5 +++-- 43 files changed, 305 insertions(+), 182 deletions(-) Best regards Marek Szyprowski Samsung Poland R&D Center

13 years, 8 months

2
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120945-linaro-mm-sig

by 消灭▲财务黑洞▲

财务黑洞无情-消灭漏洞有道【培训时间】2012年4月13-14日深圳 4月20-21日上海 4月27-28日北京 6月9-10日深圳 6月15-16日上海 7月6-7日北京【培训对象】公司股东、董事长、经理以及企业其他中高层管理人员。【培训费用】￥2800元/人（提供讲义、午餐、发票、茶点等） ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 【课程背景】邓老师告诉你：如何发现财务健康的DNA密码如何做到：消灭财务漏洞避免财务黑洞确保经营成果中国企业财务黑洞问题诊断与防范行家，消灭财务黑洞专题研究第一人。用百度搜索“消灭财务漏洞”6个字达260多万条，影响巨大！用谷歌搜索“邓鸿老师”4个字达到1000多万条，是否徒有虚名？培训目标： 1、企业财务黑洞是由多方面因素造成的，财务黑洞的封杀要有专业指导、丰富的实践经验和恰当的方式方法。 2、企业的财务工作好坏不单只是财务部的事情，是企业综合管理水平的体现。邓老师以自己多年所经历的，许多老板用昂贵的金钱甚至是生命为代价所换来的丰富案例，策您警醒，让你吃人家之堑长自己之智。 3、经常听到会计人员抱怨：老板不重视财务。你不妨请你的老板来听一场邓老师的《消灭财务黑洞》的课程，也许是你送给老板的最好礼物！也是给自己工作的最好帮助；经常听到我们的会计抱怨：同事不配合、不理解、不支持我们的财务工作。你不妨建议老板请邓老师去给你的公司全体员工上一堂《消灭财务黑洞》的课程，你的工作环境是不是会得到显著改善？你不妨试一试？课程100%为落地可操作的方法与工具，绝对实战、实效、实用！授课方式：专题讲授、互动交流、案例分析 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 【课程大纲】序言： 1、什么是黑洞？ 2、什么是财务黑洞？ 3、织网与补网一、财务黑洞的八大原发病毒（一）收款黑洞 1、常规收款手段为什么失效？ 2、货款要不回为什么还要倒赔钱？ 3、案例：合同纠纷背后的货款欺诈陷阱 4、消灭财务黑洞： A、结合案件一些证据和日常单据明白问题在哪里？ B、如何解决和防范诊断出来的问题？（二）付款黑洞 1、公司有没有资金紧张的时候？资金紧张怎么办？你是怎么做的？为什么说你的做法是错误的，是在自己制造财务黑洞，或者说是自掘陷阱！ 2、错误表现在两个极端：（1）一个极端是忽悠、再忽悠（有的）到骗；（2）另一个极端是扛、死扛、扛到死，把自己弄得很悲壮 3、消灭财务黑洞：（1）惨淡经营、死扛、扛到死有没有必要？（2）提供两种解决办法，供参考：办法一、你能不能挑出可以帮助你暂时渡过难关的那些供应商？暂时继续占用一下人家的资金。办法二、有没有第三条路可走？第三条路怎么走？案例：企业暂停经营撇债（三）税务黑洞 1、内外两套账，为什么税务一查一个准？ 2、是什么原因？因为有三道坎迈不过去：第一道坎：合同与账本，两张皮不黏！第二道坎：资金账户似迷宫，剪不断来理还乱第三道坎：账实要相符，神仙也犯难 3、面对三道坎，你是不是就束手无策？消灭财务黑洞，道在哪里？案例：桌上放收款单据的故事的后续故事（四）投资黑洞 1、投资前-- 练就火眼金睛问题：（1）没有看清合作方，搞清楚其真实意图，让表面现象所迷惑；（2）对产权状况不清，盲目投资；（3）公司收购的两大猫腻如何识破猫腻？避免陷于巨大财务黑洞？ 2、投资合作中-- 给我一双慧眼，不要聪明人办傻事问题：（1）是投资入股还是借款？（2）问题形成后处理方法要得当 3、投资后-- 半睁半闭眼睛，要吃小亏避免上大当。（五）融资黑洞 1、不懂融资，要多作功课，不要犯吃饭不看菜，裁衣不量体常识错误。表现： 1、喜欢包装，“临时抱佛脚” 2、盲目相信中介，迷信能人和关系功课之一：企业所处的发展阶段不同融资渠道有别功课之二：用好企业现有的有效资源是融资的关键。功课之三：认识资金和其能够提供的金融产品，不要做瞎子摸象 2、为了融资而融资，一条道走到黑表现： a、抛开实业玩概念； b、盲目相信过度包装。 3、企业在融资时如何防骗？（六）沟通黑洞 1、采购绑架财务 2、销售尾巴何其多？某物业管理公司的案例三招解决公司沟通黑洞（七）成本黑洞 1、企业成本核算的基本要求 2、案例：原材料成本 X 2 = 销售价的故事（八）管理黑洞 1、会计由谁来招聘？人事部和老板招聘的会计有什么错？ 2、会计工作能不能胜任由谁来考察？ 3、会计经常换有什么严重后果？ 4、账实严重不相符谁之过？ 5、案例：（1）逾期未提交出口单据，税局认定“内销”，补税和滞纳金等500多万元。（2）单据不齐，1000余万出口退税遇阻。二、财务黑洞根源探究 1、曲突徙薪亡恩泽，焦头烂额为上客。 ----忙救火，疏预防 2、麦克唐纳牧师的故事 ----只知其一，不知其二；或者说：知其然不知其所以然。 3、犯用人之忌！（1）用老乡 a、老乡老乡，背后一枪 b、老乡靠得住，母猪能上树（2）用老婆老婆做出纳，管住了钱还有什么没有管住？ 4、四大认识误区最害人，现在明白来得及。三、消灭财务黑洞之道（一）练就消灭财务黑洞的上乘功法 1、五个前提条件 2、织网与补网，你做何选择？ 3、审查方法介绍（1）业务循环审查法（2）五大审查技术方法介绍（二）四级定位防范财务黑洞咨询系统介绍 A、消灭财务黑洞咨询服务方法 1、发现财务黑洞是一项复杂的系统专业工程 2、抓住8大高发点，以点带面，寻根探源，让财务黑洞无可逃遁。 B、四级定位图介绍?? ? 1级：人（财务）行，制度、流程也行解决办法：执行偏差的案例 2级：人（财务）行，制度流程不行 3级：人（财务）不行，制度流程行 4级：人（财务）不行，制度流程也不行案例：理清了一团乱麻四、警惕财务黑洞的变种病毒案例1：外派黑洞：养虎为患案例2：材料黑洞：空运费大于机器价值案例案例3：保密黑洞：老板被敲诈案例4：收购公司黑洞案例5：某公司海外上市劫 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 【讲师介绍】邓鸿中国企业财务黑洞问题诊断与防范行家，消灭财务黑洞专题研究第一人 --深圳市福中达投资控股有限公司财务总监 --深圳市多丽电子商务产业园财务顾问 --亚太集团会计师事务所有限公司深圳所合伙人亚太集团会计师事务所有限公司深圳所注册会计师、执业年限12年、会计、审计、财务管理岗位及顾问工作从业年限28年。资深注册会计师、香港城市大学国际会计硕士，亚太集团会计师事务所有限公司深圳总部合伙人。企业各类财务漏洞、财务黑洞问题的咨询诊断与防范行家。资深财务管理、审计、咨询从业者，担任过多家企业财务顾问，从事企业财务管理、咨询和投融资工作达二十多年, 具有较强的综合协调沟通问题能力，主持及参与的项目达三位数以上，具有较为丰富的财务管理、企业投融资、审计、评估、税收筹划、财务税收顾问经验。 ? ? 熟悉国家财务制度和相关政策法规，熟悉国家税收法律法规，熟悉公司改制及上市制度及程序、熟悉财政、税务、工商、劳动人事等政府各部门办事程序及方法，熟悉银行等金融机构投融资技巧并有一定的投融资渠道。有较强的文字功力，能将工作中发现的问题及改进办法整理发表，曾在中国著名《财经》杂志、《会计月刊》、《公司金融》等报刊杂志上发表百多篇文章，《公司金融》杂志更是开辟专栏连载财务黑洞研究方面的系列文章。本人的经验总结性文章《财务黑洞案例实录》在中国会计界最高学府“国家会计学院”“中国会计视野”网站发表一天就达2500多浏览量，创该站记录，时至今日热度不减，第二天就已被收入“中国会计视野”精品文库，仅该网站网友留言就达200多条，转载网站达几万家，上至企业老板，下至大学学生都将该文当做教科书，备受关注和引发热议。在《公司金融》（国内统一刊号：CN44-1563/F 国际标准连续出版刊号：ISSN 1671-6728）杂志上连载的文章有： 1、《私募融资背后的商业谎言》 2009年10月1日总第42期 2、财务黑洞启示录（一）--《内外账的老思维要不得了》 2009年11月1日总第44期 3、财务黑洞启示录（二）--《单据丢失酝酿严重税务后果》2009年11月16日总第45期 4、财务黑洞启示录（三）--《表述模糊引发十年官司》 2009年12月1日总第46期 5、财务黑洞启示录（四）--《合同纠纷背后的货款欺诈陷阱》2010年1月1日总第48期 6、财务黑洞启示录（五）--《友情信任反成投资陷阱》 2010年1月16日总第49期 7、财务黑洞启示录（六）--《资产收购中隐藏的猫腻》 2010年2月1日总第50期培训风格 1.邓鸿老师有很强的现场亲和力、敏锐的学员洞察力以及丰富的授课经验，了解成年人学习的特点，把复杂的问题说得通俗易懂。 2.授课风格既稳重，但又不乏幽默和风趣，采用多样化的互动授课方式，营造轻松愉快的学习气氛，充分调动学员的听课积极性。 3.授课内容既有理论深度，又注重实用效果，使学员在培训后，能在工作中解决实际问题，体现培训真正的价值。培训现场互动性很强，有很强的控场能力，倡导“家常式的互动性强”的授课理念。邓老师提倡实用、实在、实际、实战的培训风格，用专业、专注、方向、方法凝聚学员的满意。 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 深.圳报.名.热.线：０７５５- - ６１.２８.２５.７１陈小姐上.海报.名.热.线: ０２１- - ５１.８７.３７.０８张先生温馨提示:(每期限40人,如需参加请提前预定) QQ订位!-1078861118 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ ▲请将以下报名表内容填写后发送到：chinasypx(a)foxmail.xn--com-s18docw0dhtoqp48a05g9vuvzhmss763etxf01o3s3g! 　　　　　　　　　　　报名回执表　　我单位共_______人报.名参加财务黑洞无情-消灭漏洞有道 4月13-14日深圳□ 4月20-21日上海□ 4月27-28日北京□ 单位名称：_____________________________________________ 联系人：_____________ 联系电话：_______________ 手机：_______________ 图文传真：_____________ 电子信箱：_____________________________________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 总费用：___________ 元整。付款方式：□ 现金　□ 支票　□ 转帐　　（请选择打“√”）备注: 1.请您把报名回执认真填好后回传我司，为确保您报名无误,请您再次电话确认! 2.本课程可根据企业需要组织内训。

13 years, 8 months

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注塑★ 零缺陷★

by 美国技术

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13 years, 8 months

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[PATCH] drm: base prime/dma-buf support (v5)

by Dave Airlie

From: Dave Airlie <airlied(a)redhat.com> This adds the basic drm dma-buf interface layer, called PRIME, The main APIs exposed to userspace allow translating a 32-bit object handle to a file descriptor, and a file descriptor to a 32-bit object handle. The flags value is currently limited to O_CLOEXEC. Acknowledgements: Daniel Vetter: lots of review Rob Clark: cleaned up lots of the internals and did lifetime review. v2: rename some functions after Chris preferred a green shed fix IS_ERR_OR_NULL -> IS_ERR v3: Fix Ville pointed out using buffer + kmalloc v4: add locking as per ickle review v5: allow re-exporting the original dma-buf (Daniel) Signed-off-by: Dave Airlie <airlied(a)redhat.com> --- drivers/gpu/drm/Kconfig | 1 + drivers/gpu/drm/Makefile | 2 +- drivers/gpu/drm/drm_drv.c | 4 + drivers/gpu/drm/drm_fops.c | 7 + drivers/gpu/drm/drm_gem.c | 9 ++ drivers/gpu/drm/drm_prime.c | 299 +++++++++++++++++++++++++++++++++++++++++++ include/drm/drm.h | 14 ++- include/drm/drmP.h | 62 +++++++++ 8 files changed, 396 insertions(+), 2 deletions(-) create mode 100644 drivers/gpu/drm/drm_prime.c diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index cc11488..e354bc0 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -9,6 +9,7 @@ menuconfig DRM depends on (AGP || AGP=n) && !EMULATED_CMPXCHG && MMU select I2C select I2C_ALGOBIT + select DMA_SHARED_BUFFER help Kernel-level support for the Direct Rendering Infrastructure (DRI) introduced in XFree86 4.0. If you say Y here, you need to select diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index a858532..c20da5b 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -12,7 +12,7 @@ drm-y := drm_auth.o drm_buffer.o drm_bufs.o drm_cache.o \ drm_platform.o drm_sysfs.o drm_hashtab.o drm_mm.o \ drm_crtc.o drm_modes.o drm_edid.o \ drm_info.o drm_debugfs.o drm_encoder_slave.o \ - drm_trace_points.o drm_global.o + drm_trace_points.o drm_global.o drm_prime.o drm-$(CONFIG_COMPAT) += drm_ioc32.o diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 0b65fbc..6116e3b 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -136,6 +136,10 @@ static struct drm_ioctl_desc drm_ioctls[] = { DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED), + + DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED), + DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED), + DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED), DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED), diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c index 7348a3d..cdfbf27 100644 --- a/drivers/gpu/drm/drm_fops.c +++ b/drivers/gpu/drm/drm_fops.c @@ -271,6 +271,9 @@ static int drm_open_helper(struct inode *inode, struct file *filp, if (dev->driver->driver_features & DRIVER_GEM) drm_gem_open(dev, priv); + if (drm_core_check_feature(dev, DRIVER_PRIME)) + drm_prime_init_file_private(&priv->prime); + if (dev->driver->open) { ret = dev->driver->open(dev, priv); if (ret < 0) @@ -571,6 +574,10 @@ int drm_release(struct inode *inode, struct file *filp) if (dev->driver->postclose) dev->driver->postclose(dev, file_priv); + + if (drm_core_check_feature(dev, DRIVER_PRIME)) + drm_prime_destroy_file_private(&file_priv->prime); + kfree(file_priv); /* ======================================================== diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index 0ef358e..83114b5 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -35,6 +35,7 @@ #include <linux/mman.h> #include <linux/pagemap.h> #include <linux/shmem_fs.h> +#include <linux/dma-buf.h> #include "drmP.h" /** @file drm_gem.c @@ -232,6 +233,10 @@ drm_gem_handle_delete(struct drm_file *filp, u32 handle) idr_remove(&filp->object_idr, handle); spin_unlock(&filp->table_lock); + if (obj->import_attach) + drm_prime_remove_imported_buf_handle(&filp->prime, + obj->import_attach->dmabuf); + if (dev->driver->gem_close_object) dev->driver->gem_close_object(obj, filp); drm_gem_object_handle_unreference_unlocked(obj); @@ -527,6 +532,10 @@ drm_gem_object_release_handle(int id, void *ptr, void *data) struct drm_gem_object *obj = ptr; struct drm_device *dev = obj->dev; + if (obj->import_attach) + drm_prime_remove_imported_buf_handle(&file_priv->prime, + obj->import_attach->dmabuf); + if (dev->driver->gem_close_object) dev->driver->gem_close_object(obj, file_priv); diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c new file mode 100644 index 0000000..ff566eb --- /dev/null +++ b/drivers/gpu/drm/drm_prime.c @@ -0,0 +1,299 @@ +/* + * Copyright © 2012 Red Hat + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + * Authors: + * Dave Airlie <airlied(a)redhat.com> + * Rob Clark <rob.clark(a)linaro.org> + * + */ + +#include <linux/export.h> +#include <linux/dma-buf.h> +#include "drmP.h" + +/* + * DMA-BUF/GEM Object references and lifetime overview: + * + * On the export the dma_buf holds a reference to the exporting GEM + * object. It takes this reference in handle_to_fd_ioctl, when it + * first calls .prime_export and stores the exporting GEM object in + * the dma_buf priv. This reference is released when the dma_buf + * object goes away in the driver .release function. + * + * On the import the importing GEM object holds a reference to the + * dma_buf (which in turn holds a ref to the exporting GEM object). + * It takes that reference in the fd_to_handle ioctl. + * It calls dma_buf_get, creates an attachment to it and stores the + * attachment in the GEM object. When this attachment is destroyed + * when the imported object is destroyed, we remove the attachment + * and drop the reference to the dma_buf. + * + * Thus the chain of references always flows in one direction + * (avoiding loops): importing_gem -> dmabuf -> exporting_gem + */ + +struct drm_prime_member { + struct list_head entry; + struct dma_buf *dma_buf; + uint32_t handle; +}; + +int drm_gem_prime_handle_to_fd(struct drm_device *dev, + struct drm_file *file_priv, uint32_t handle, uint32_t flags, + int *prime_fd) +{ + struct drm_gem_object *obj; + void *buf; + + obj = drm_gem_object_lookup(dev, file_priv, handle); + if (!obj) + return -ENOENT; + + mutex_lock(&file_priv->prime.lock); + /* re-export the original imported object */ + if (obj->import_attach) { + get_dma_buf(obj->import_attach->dmabuf); + *prime_fd = dma_buf_fd(obj->import_attach->dmabuf, flags); + drm_gem_object_unreference_unlocked(obj); + mutex_unlock(&file_priv->prime.lock); + return 0; + } + + if (obj->export_dma_buf) { + get_dma_buf(obj->export_dma_buf); + *prime_fd = dma_buf_fd(obj->export_dma_buf, flags); + drm_gem_object_unreference_unlocked(obj); + } else { + buf = dev->driver->gem_prime_export(dev, obj, flags); + if (IS_ERR(buf)) { + /* normally the created dma-buf takes ownership of the ref, + * but if that fails then drop the ref + */ + drm_gem_object_unreference_unlocked(obj); + mutex_unlock(&file_priv->prime.lock); + return PTR_ERR(buf); + } + obj->export_dma_buf = buf; + *prime_fd = dma_buf_fd(buf, flags); + } + mutex_unlock(&file_priv->prime.lock); + return 0; +} +EXPORT_SYMBOL(drm_gem_prime_handle_to_fd); + +int drm_gem_prime_fd_to_handle(struct drm_device *dev, + struct drm_file *file_priv, int prime_fd, uint32_t *handle) +{ + struct dma_buf *dma_buf; + struct drm_gem_object *obj; + int ret; + + dma_buf = dma_buf_get(prime_fd); + if (IS_ERR(dma_buf)) + return PTR_ERR(dma_buf); + + mutex_lock(&file_priv->prime.lock); + + ret = drm_prime_lookup_imported_buf_handle(&file_priv->prime, + dma_buf, handle); + if (!ret) { + ret = 0; + goto out_put; + } + + /* never seen this one, need to import */ + obj = dev->driver->gem_prime_import(dev, dma_buf); + if (IS_ERR(obj)) { + ret = PTR_ERR(obj); + goto out_put; + } + + ret = drm_gem_handle_create(file_priv, obj, handle); + drm_gem_object_unreference_unlocked(obj); + if (ret) + goto out_put; + + ret = drm_prime_add_imported_buf_handle(&file_priv->prime, + dma_buf, *handle); + if (ret) + goto fail; + + mutex_unlock(&file_priv->prime.lock); + return 0; + +fail: + /* hmm, if driver attached, we are relying on the free-object path + * to detach.. which seems ok.. + */ + drm_gem_object_handle_unreference_unlocked(obj); +out_put: + dma_buf_put(dma_buf); + mutex_unlock(&file_priv->prime.lock); + return ret; +} +EXPORT_SYMBOL(drm_gem_prime_fd_to_handle); + +int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_prime_handle *args = data; + uint32_t flags; + + if (!drm_core_check_feature(dev, DRIVER_PRIME)) + return -EINVAL; + + if (!dev->driver->prime_handle_to_fd) + return -ENOSYS; + + /* check flags are valid */ + if (args->flags & ~DRM_CLOEXEC) + return -EINVAL; + + /* we only want to pass DRM_CLOEXEC which is == O_CLOEXEC */ + flags = args->flags & DRM_CLOEXEC; + + return dev->driver->prime_handle_to_fd(dev, file_priv, + args->handle, flags, &args->fd); +} + +int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_prime_handle *args = data; + + if (!drm_core_check_feature(dev, DRIVER_PRIME)) + return -EINVAL; + + if (!dev->driver->prime_fd_to_handle) + return -ENOSYS; + + return dev->driver->prime_fd_to_handle(dev, file_priv, + args->fd, &args->handle); +} + +/* + * drm_prime_pages_to_sg + * + * this helper creates an sg table object from a set of pages + * the driver is responsible for mapping the pages into the + * importers address space + */ +struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages) +{ + struct sg_table *sg = NULL; + struct scatterlist *iter; + int i; + int ret; + + sg = kmalloc(sizeof(struct sg_table), GFP_KERNEL); + if (!sg) + goto out; + + ret = sg_alloc_table(sg, nr_pages, GFP_KERNEL); + if (ret) + goto out; + + for_each_sg(sg->sgl, iter, nr_pages, i) + sg_set_page(iter, pages[i], PAGE_SIZE, 0); + + return sg; +out: + kfree(sg); + return NULL; +} +EXPORT_SYMBOL(drm_prime_pages_to_sg); + +/* helper function to cleanup a GEM/prime object */ +void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg) +{ + struct dma_buf_attachment *attach; + struct dma_buf *dma_buf; + attach = obj->import_attach; + if (sg) + dma_buf_unmap_attachment(attach, sg, DMA_BIDIRECTIONAL); + dma_buf = attach->dmabuf; + dma_buf_detach(attach->dmabuf, attach); + /* remove the reference */ + dma_buf_put(dma_buf); +} +EXPORT_SYMBOL(drm_prime_gem_destroy); + +void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv) +{ + INIT_LIST_HEAD(&prime_fpriv->head); + mutex_init(&prime_fpriv->lock); +} +EXPORT_SYMBOL(drm_prime_init_file_private); + +void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv) +{ + struct drm_prime_member *member, *safe; + list_for_each_entry_safe(member, safe, &prime_fpriv->head, entry) { + list_del(&member->entry); + kfree(member); + } +} +EXPORT_SYMBOL(drm_prime_destroy_file_private); + +int drm_prime_add_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t handle) +{ + struct drm_prime_member *member; + + member = kmalloc(sizeof(*member), GFP_KERNEL); + if (!member) + return -ENOMEM; + + member->dma_buf = dma_buf; + member->handle = handle; + list_add(&member->entry, &prime_fpriv->head); + return 0; +} +EXPORT_SYMBOL(drm_prime_add_imported_buf_handle); + +int drm_prime_lookup_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle) +{ + struct drm_prime_member *member; + + list_for_each_entry(member, &prime_fpriv->head, entry) { + if (member->dma_buf == dma_buf) { + *handle = member->handle; + return 0; + } + } + return -ENOENT; +} +EXPORT_SYMBOL(drm_prime_lookup_imported_buf_handle); + +void drm_prime_remove_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf) +{ + struct drm_prime_member *member, *safe; + + mutex_lock(&prime_fpriv->lock); + list_for_each_entry_safe(member, safe, &prime_fpriv->head, entry) { + if (member->dma_buf == dma_buf) { + list_del(&member->entry); + kfree(member); + } + } + mutex_unlock(&prime_fpriv->lock); +} +EXPORT_SYMBOL(drm_prime_remove_imported_buf_handle); diff --git a/include/drm/drm.h b/include/drm/drm.h index 34a7b89..64ff02d 100644 --- a/include/drm/drm.h +++ b/include/drm/drm.h @@ -617,6 +617,17 @@ struct drm_get_cap { __u64 value; }; +#define DRM_CLOEXEC O_CLOEXEC +struct drm_prime_handle { + __u32 handle; + + /** Flags.. only applicable for handle->fd */ + __u32 flags; + + /** Returned dmabuf file descriptor */ + __s32 fd; +}; + #include "drm_mode.h" #define DRM_IOCTL_BASE 'd' @@ -673,7 +684,8 @@ struct drm_get_cap { #define DRM_IOCTL_UNLOCK DRM_IOW( 0x2b, struct drm_lock) #define DRM_IOCTL_FINISH DRM_IOW( 0x2c, struct drm_lock) -#define DRM_IOCTL_GEM_PRIME_OPEN DRM_IOWR(0x2e, struct drm_gem_open) +#define DRM_IOCTL_PRIME_HANDLE_TO_FD DRM_IOWR(0x2d, struct drm_prime_handle) +#define DRM_IOCTL_PRIME_FD_TO_HANDLE DRM_IOWR(0x2e, struct drm_prime_handle) #define DRM_IOCTL_AGP_ACQUIRE DRM_IO( 0x30) #define DRM_IOCTL_AGP_RELEASE DRM_IO( 0x31) diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 574bd1c..dd73104 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -91,6 +91,7 @@ struct drm_device; #define DRM_UT_CORE 0x01 #define DRM_UT_DRIVER 0x02 #define DRM_UT_KMS 0x04 +#define DRM_UT_PRIME 0x08 /* * Three debug levels are defined. * drm_core, drm_driver, drm_kms @@ -150,6 +151,7 @@ int drm_err(const char *func, const char *format, ...); #define DRIVER_IRQ_VBL2 0x800 #define DRIVER_GEM 0x1000 #define DRIVER_MODESET 0x2000 +#define DRIVER_PRIME 0x4000 #define DRIVER_BUS_PCI 0x1 #define DRIVER_BUS_PLATFORM 0x2 @@ -215,6 +217,11 @@ int drm_err(const char *func, const char *format, ...); drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME, \ __func__, fmt, ##args); \ } while (0) +#define DRM_DEBUG_PRIME(fmt, args...) \ + do { \ + drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME, \ + __func__, fmt, ##args); \ + } while (0) #define DRM_LOG(fmt, args...) \ do { \ drm_ut_debug_printk(DRM_UT_CORE, NULL, \ @@ -238,6 +245,7 @@ int drm_err(const char *func, const char *format, ...); #else #define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0) #define DRM_DEBUG_KMS(fmt, args...) do { } while (0) +#define DRM_DEBUG_PRIME(fmt, args...) do { } while (0) #define DRM_DEBUG(fmt, arg...) do { } while (0) #define DRM_LOG(fmt, arg...) do { } while (0) #define DRM_LOG_KMS(fmt, args...) do { } while (0) @@ -410,6 +418,12 @@ struct drm_pending_event { void (*destroy)(struct drm_pending_event *event); }; +/* initial implementaton using a linked list - todo hashtab */ +struct drm_prime_file_private { + struct list_head head; + struct mutex lock; +}; + /** File private data */ struct drm_file { int authenticated; @@ -437,6 +451,8 @@ struct drm_file { wait_queue_head_t event_wait; struct list_head event_list; int event_space; + + struct drm_prime_file_private prime; }; /** Wait queue */ @@ -652,6 +668,12 @@ struct drm_gem_object { uint32_t pending_write_domain; void *driver_private; + + /* dma buf exported from this GEM object */ + struct dma_buf *export_dma_buf; + + /* dma buf attachment backing this object */ + struct dma_buf_attachment *import_attach; }; #include "drm_crtc.h" @@ -890,6 +912,20 @@ struct drm_driver { int (*gem_open_object) (struct drm_gem_object *, struct drm_file *); void (*gem_close_object) (struct drm_gem_object *, struct drm_file *); + /* prime: */ + /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */ + int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv, + uint32_t handle, uint32_t flags, int *prime_fd); + /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */ + int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv, + int prime_fd, uint32_t *handle); + /* export GEM -> dmabuf */ + struct dma_buf * (*gem_prime_export)(struct drm_device *dev, + struct drm_gem_object *obj, int flags); + /* import dmabuf -> GEM */ + struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev, + struct dma_buf *dma_buf); + /* vga arb irq handler */ void (*vgaarb_irq)(struct drm_device *dev, bool state); @@ -1509,6 +1545,32 @@ extern int drm_vblank_info(struct seq_file *m, void *data); extern int drm_clients_info(struct seq_file *m, void* data); extern int drm_gem_name_info(struct seq_file *m, void *data); + +extern int drm_gem_prime_handle_to_fd(struct drm_device *dev, + struct drm_file *file_priv, uint32_t handle, uint32_t flags, + int *prime_fd); +extern int drm_gem_prime_fd_to_handle(struct drm_device *dev, + struct drm_file *file_priv, int prime_fd, uint32_t *handle); + +extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv); +extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv); + +extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages); +extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg); + + +void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv); +void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv); +int drm_prime_add_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t handle); +int drm_prime_lookup_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf, uint32_t *handle); +void drm_prime_remove_imported_buf_handle(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf); + +int drm_prime_add_dma_buf(struct drm_device *dev, struct drm_gem_object *obj); +int drm_prime_lookup_obj(struct drm_device *dev, struct dma_buf *buf, + struct drm_gem_object **obj); + #if DRM_DEBUG_CODE extern int drm_vma_info(struct seq_file *m, void *data); #endif -- 1.7.7.6

13 years, 8 months

6
5
0 0

[PATCH 00/14] DMA-mapping framework redesign preparation

by Marek Szyprowski

Hello eveyone, On Linaro Memory Management meeting in Budapest (May 2011) we have discussed about the design of DMA mapping framework. We tried to identify the drawbacks and limitations as well as to provide some a solution for them. The discussion was mainly about ARM architecture, but some of the conclusions need to be applied to cross-architecture code. The first issue we identified is the fact that on some platform (again, mainly ARM) there are several functions for allocating DMA buffers: dma_alloc_coherent, dma_alloc_writecombine and dma_alloc_noncoherent (not functional now). For each of them there is a match dma_free_* function. This gives us quite a lot of functions in the public API and complicates things when we need to have several different implementations for different devices selected in runtime (if IOMMU controller is available only for a few devices in the system). Also the drivers which use less common variants are less portable because of the lacks of dma_alloc_writecombine on other architectures. The solution we found is to introduce a new public dma mapping functions with additional attributes argument: dma_alloc_attrs and dma_free_attrs(). This way all different kinds of architecture specific buffer mappings can be hidden behind the attributes without the need of creating several versions of dma_alloc_ function. dma_alloc_coherent() can be wrapped on top of new dma_alloc_attrs() with NULL attrs parameter. dma_alloc_writecombine and dma_alloc_noncoherent can be implemented as a simple wrappers which sets attributes to DMA_ATTRS_WRITECOMBINE or DMA_ATTRS_NON_CONSISTENT respectively. These new attributes will be implemented only on the architectures that really support them, the others will simply ignore them defaulting to the dma_alloc_coherent equivalent. The next step in dma mapping framework update is the introduction of dma_mmap/dma_mmap_attrs() function. There are a number of drivers (mainly V4L2 and ALSA) that only exports the DMA buffers to user space. Creating a userspace mapping with correct page attributes is not an easy task for the driver. Also the DMA-mapping framework is the only place where the complete information about the allocated pages is available, especially if the implementation uses IOMMU controller to provide a contiguous buffer in DMA address space which is scattered in physical memory space. Usually these drivers don't touch the buffer data at all, so the mapping in kernel virtual address space is not needed. We can introduce DMA_ATTRIB_NO_KERNEL_MAPPING attribute which lets kernel to skip/ignore creation of kernel virtual mapping. This way we can save previous vmalloc area and simply some mapping operation on a few architectures. This patch series is a preparation for the above changes in the public dma mapping API. The main goal is to modify dma_map_ops structure and let all users to use for implementation of the new public funtions. The proof-of-concept patches for ARM architecture have been already posted a few times and now they are working resonably well. They perform conversion to dma_map_ops based implementation and add support for generic IOMMU-based dma mapping implementation. To get them merged we first need to get acceptance for the changes in the common, cross-architecture structures. More information about these patches can be found in the following threads: http://www.spinics.net/lists/linux-mm/msg19856.html http://www.spinics.net/lists/linux-mm/msg21241.html http://lists.linaro.org/pipermail/linaro-mm-sig/2011-September/000571.html http://lists.linaro.org/pipermail/linaro-mm-sig/2011-September/000577.html http://www.spinics.net/lists/linux-mm/msg25490.html The patches are prepared on top of Linux Kernel v3.2-rc6. I would appreciate any comments and help with getting this patch series into linux-next tree. The idea apllied in this patch set have been also presented during the Kernel Summit 2011 and ELC-E 2011 in Prague, in the presentation 'ARM DMA-Mapping Framework Redesign and IOMMU integration'. I'm really sorry if I missed any of the relevant architecture mailing lists. I've did my best to include everyone. Feel free to forward this patchset to all interested developers and maintainers. I've already feel like a nasty spammer. Best regards Marek Szyprowski Samsung Poland R&D Center Patch summary: Andrzej Pietrasiewicz (9): X86: adapt for dma_map_ops changes MIPS: adapt for dma_map_ops changes PowerPC: adapt for dma_map_ops changes IA64: adapt for dma_map_ops changes SPARC: adapt for dma_map_ops changes Alpha: adapt for dma_map_ops changes SH: adapt for dma_map_ops changes Microblaze: adapt for dma_map_ops changes Unicore32: adapt for dma_map_ops changes Marek Szyprowski (5): common: dma-mapping: introduce alloc_attrs and free_attrs methods common: dma-mapping: remove old alloc_coherent and free_coherent methods common: dma-mapping: introduce mmap method common: DMA-mapping: add WRITE_COMBINE attribute common: DMA-mapping: add NON-CONSISTENT attribute Documentation/DMA-attributes.txt | 19 +++++++++++++++++++ arch/alpha/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/alpha/kernel/pci-noop.c | 10 ++++++---- arch/alpha/kernel/pci_iommu.c | 10 ++++++---- arch/ia64/hp/common/sba_iommu.c | 11 ++++++----- arch/ia64/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/ia64/kernel/pci-swiotlb.c | 9 +++++---- arch/ia64/sn/pci/pci_dma.c | 9 +++++---- arch/microblaze/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/microblaze/kernel/dma.c | 10 ++++++---- arch/mips/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/mips/mm/dma-default.c | 8 ++++---- arch/powerpc/include/asm/dma-mapping.h | 24 ++++++++++++++++-------- arch/powerpc/kernel/dma-iommu.c | 10 ++++++---- arch/powerpc/kernel/dma-swiotlb.c | 4 ++-- arch/powerpc/kernel/dma.c | 10 ++++++---- arch/powerpc/kernel/ibmebus.c | 10 ++++++---- arch/powerpc/platforms/cell/iommu.c | 16 +++++++++------- arch/powerpc/platforms/ps3/system-bus.c | 13 +++++++------ arch/sh/include/asm/dma-mapping.h | 28 ++++++++++++++++++---------- arch/sh/kernel/dma-nommu.c | 4 ++-- arch/sh/mm/consistent.c | 6 ++++-- arch/sparc/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/sparc/kernel/iommu.c | 10 ++++++---- arch/sparc/kernel/ioport.c | 18 ++++++++++-------- arch/sparc/kernel/pci_sun4v.c | 9 +++++---- arch/unicore32/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/unicore32/mm/dma-swiotlb.c | 4 ++-- arch/x86/include/asm/dma-mapping.h | 26 ++++++++++++++++---------- arch/x86/kernel/amd_gart_64.c | 11 ++++++----- arch/x86/kernel/pci-calgary_64.c | 9 +++++---- arch/x86/kernel/pci-dma.c | 3 ++- arch/x86/kernel/pci-nommu.c | 6 +++--- arch/x86/kernel/pci-swiotlb.c | 12 +++++++----- arch/x86/xen/pci-swiotlb-xen.c | 4 ++-- drivers/iommu/amd_iommu.c | 10 ++++++---- drivers/iommu/intel-iommu.c | 9 +++++---- drivers/xen/swiotlb-xen.c | 5 +++-- include/linux/dma-attrs.h | 2 ++ include/linux/dma-mapping.h | 13 +++++++++---- include/linux/swiotlb.h | 6 ++++-- include/xen/swiotlb-xen.h | 6 ++++-- lib/swiotlb.c | 5 +++-- 43 files changed, 305 insertions(+), 182 deletions(-) -- 1.7.1.569.g6f426

13 years, 8 months

9
30
0 0

[GIT PULL] DMA-mapping framework updates for 3.4

by Marek Szyprowski

Hi Linus, Please pull the dma-mapping framework updates for v3.4 since commit c16fa4f2ad19908a47c63d8fa436a1178438c7e7: Linux 3.3 with the top-most commit e749a9f707f1102735e02338fa564be86be3bb69 common: DMA-mapping: add NON-CONSISTENT attribute from the git repository at: git://git.infradead.org/users/kmpark/linux-samsung dma-mapping-next Those patches introduce a new alloc method (with support for memory attributes) in dma_map_ops structure, which will later replace dma_alloc_coherent and dma_alloc_writecombine functions. Thanks! Best regards Marek Szyprowski Samsung Poland R&D Center Patch summary: Andrzej Pietrasiewicz (9): X86: adapt for dma_map_ops changes MIPS: adapt for dma_map_ops changes PowerPC: adapt for dma_map_ops changes IA64: adapt for dma_map_ops changes SPARC: adapt for dma_map_ops changes Alpha: adapt for dma_map_ops changes SH: adapt for dma_map_ops changes Microblaze: adapt for dma_map_ops changes Unicore32: adapt for dma_map_ops changes Marek Szyprowski (6): common: dma-mapping: introduce alloc_attrs and free_attrs methods Hexagon: adapt for dma_map_ops changes common: dma-mapping: remove old alloc_coherent and free_coherent methods common: dma-mapping: introduce mmap method common: DMA-mapping: add WRITE_COMBINE attribute common: DMA-mapping: add NON-CONSISTENT attribute Documentation/DMA-attributes.txt | 19 +++++++++++++++++++ arch/alpha/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/alpha/kernel/pci-noop.c | 10 ++++++---- arch/alpha/kernel/pci_iommu.c | 10 ++++++---- arch/hexagon/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/hexagon/kernel/dma.c | 9 +++++---- arch/ia64/hp/common/sba_iommu.c | 11 ++++++----- arch/ia64/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/ia64/kernel/pci-swiotlb.c | 9 +++++---- arch/ia64/sn/pci/pci_dma.c | 9 +++++---- arch/microblaze/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/microblaze/kernel/dma.c | 10 ++++++---- arch/mips/cavium-octeon/dma-octeon.c | 16 ++++++++-------- arch/mips/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/mips/mm/dma-default.c | 8 ++++---- arch/powerpc/include/asm/dma-mapping.h | 24 ++++++++++++++++-------- arch/powerpc/kernel/dma-iommu.c | 10 ++++++---- arch/powerpc/kernel/dma-swiotlb.c | 4 ++-- arch/powerpc/kernel/dma.c | 10 ++++++---- arch/powerpc/kernel/ibmebus.c | 10 ++++++---- arch/powerpc/kernel/vio.c | 14 ++++++++------ arch/powerpc/platforms/cell/iommu.c | 16 +++++++++------- arch/powerpc/platforms/ps3/system-bus.c | 13 +++++++------ arch/sh/include/asm/dma-mapping.h | 28 ++++++++++++++++++---------- arch/sh/kernel/dma-nommu.c | 4 ++-- arch/sh/mm/consistent.c | 6 ++++-- arch/sparc/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/sparc/kernel/iommu.c | 10 ++++++---- arch/sparc/kernel/ioport.c | 18 ++++++++++-------- arch/sparc/kernel/pci_sun4v.c | 9 +++++---- arch/unicore32/include/asm/dma-mapping.h | 18 ++++++++++++------ arch/unicore32/mm/dma-swiotlb.c | 4 ++-- arch/x86/include/asm/dma-mapping.h | 26 ++++++++++++++++---------- arch/x86/kernel/amd_gart_64.c | 11 ++++++----- arch/x86/kernel/pci-calgary_64.c | 9 +++++---- arch/x86/kernel/pci-dma.c | 3 ++- arch/x86/kernel/pci-nommu.c | 6 +++--- arch/x86/kernel/pci-swiotlb.c | 12 +++++++----- arch/x86/xen/pci-swiotlb-xen.c | 4 ++-- drivers/iommu/amd_iommu.c | 10 ++++++---- drivers/iommu/intel-iommu.c | 9 +++++---- drivers/xen/swiotlb-xen.c | 5 +++-- include/linux/dma-attrs.h | 2 ++ include/linux/dma-mapping.h | 13 +++++++++---- include/linux/swiotlb.h | 6 ++++-- include/xen/swiotlb-xen.h | 6 ++++-- lib/swiotlb.c | 5 +++-- 47 files changed, 338 insertions(+), 206 deletions(-)

13 years, 8 months

2
3
0 0

消灭▲财务黑▲洞

by 财务黑洞

财务黑洞无情-消灭漏洞有道【培训时间】2012年4月13-14日深圳 4月20-21日上海 4月27-28日北京 6月9-10日深圳 6月15-16日上海 7月6-7日北京【培训对象】公司股东、董事长、经理以及企业其他中高层管理人员。【培训费用】￥2800元/人（提供讲义、午餐、发票、茶点等） ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 【课程背景】邓老师告诉你：如何发现财务健康的DNA密码如何做到：消灭财务漏洞避免财务黑洞确保经营成果中国企业财务黑洞问题诊断与防范行家，消灭财务黑洞专题研究第一人。用百度搜索“消灭财务漏洞”6个字达260多万条，影响巨大！用谷歌搜索“邓鸿老师”4个字达到1000多万条，是否徒有虚名？培训目标： 1、企业财务黑洞是由多方面因素造成的，财务黑洞的封杀要有专业指导、丰富的实践经验和恰当的方式方法。 2、企业的财务工作好坏不单只是财务部的事情，是企业综合管理水平的体现。邓老师以自己多年所经历的，许多老板用昂贵的金钱甚至是生命为代价所换来的丰富案例，策您警醒，让你吃人家之堑长自己之智。 3、经常听到会计人员抱怨：老板不重视财务。你不妨请你的老板来听一场邓老师的《消灭财务黑洞》的课程，也许是你送给老板的最好礼物！也是给自己工作的最好帮助；经常听到我们的会计抱怨：同事不配合、不理解、不支持我们的财务工作。你不妨建议老板请邓老师去给你的公司全体员工上一堂《消灭财务黑洞》的课程，你的工作环境是不是会得到显著改善？你不妨试一试？课程100%为落地可操作的方法与工具，绝对实战、实效、实用！授课方式：专题讲授、互动交流、案例分析 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 【课程大纲】序言： 1、什么是黑洞？ 2、什么是财务黑洞？ 3、织网与补网一、财务黑洞的八大原发病毒（一）收款黑洞 1、常规收款手段为什么失效？ 2、货款要不回为什么还要倒赔钱？ 3、案例：合同纠纷背后的货款欺诈陷阱 4、消灭财务黑洞： A、结合案件一些证据和日常单据明白问题在哪里？ B、如何解决和防范诊断出来的问题？（二）付款黑洞 1、公司有没有资金紧张的时候？资金紧张怎么办？你是怎么做的？为什么说你的做法是错误的，是在自己制造财务黑洞，或者说是自掘陷阱！ 2、错误表现在两个极端：（1）一个极端是忽悠、再忽悠（有的）到骗；（2）另一个极端是扛、死扛、扛到死，把自己弄得很悲壮 3、消灭财务黑洞：（1）惨淡经营、死扛、扛到死有没有必要？（2）提供两种解决办法，供参考：办法一、你能不能挑出可以帮助你暂时渡过难关的那些供应商？暂时继续占用一下人家的资金。办法二、有没有第三条路可走？第三条路怎么走？案例：企业暂停经营撇债（三）税务黑洞 1、内外两套账，为什么税务一查一个准？ 2、是什么原因？因为有三道坎迈不过去：第一道坎：合同与账本，两张皮不黏！第二道坎：资金账户似迷宫，剪不断来理还乱第三道坎：账实要相符，神仙也犯难 3、面对三道坎，你是不是就束手无策？消灭财务黑洞，道在哪里？案例：桌上放收款单据的故事的后续故事（四）投资黑洞 1、投资前-- 练就火眼金睛问题：（1）没有看清合作方，搞清楚其真实意图，让表面现象所迷惑；（2）对产权状况不清，盲目投资；（3）公司收购的两大猫腻如何识破猫腻？避免陷于巨大财务黑洞？ 2、投资合作中-- 给我一双慧眼，不要聪明人办傻事问题：（1）是投资入股还是借款？（2）问题形成后处理方法要得当 3、投资后-- 半睁半闭眼睛，要吃小亏避免上大当。（五）融资黑洞 1、不懂融资，要多作功课，不要犯吃饭不看菜，裁衣不量体常识错误。表现： 1、喜欢包装，“临时抱佛脚” 2、盲目相信中介，迷信能人和关系功课之一：企业所处的发展阶段不同融资渠道有别功课之二：用好企业现有的有效资源是融资的关键。功课之三：认识资金和其能够提供的金融产品，不要做瞎子摸象 2、为了融资而融资，一条道走到黑表现： a、抛开实业玩概念； b、盲目相信过度包装。 3、企业在融资时如何防骗？（六）沟通黑洞 1、采购绑架财务 2、销售尾巴何其多？某物业管理公司的案例三招解决公司沟通黑洞（七）成本黑洞 1、企业成本核算的基本要求 2、案例：原材料成本 X 2 = 销售价的故事（八）管理黑洞 1、会计由谁来招聘？人事部和老板招聘的会计有什么错？ 2、会计工作能不能胜任由谁来考察？ 3、会计经常换有什么严重后果？ 4、账实严重不相符谁之过？ 5、案例：（1）逾期未提交出口单据，税局认定“内销”，补税和滞纳金等500多万元。（2）单据不齐，1000余万出口退税遇阻。二、财务黑洞根源探究 1、曲突徙薪亡恩泽，焦头烂额为上客。 ----忙救火，疏预防 2、麦克唐纳牧师的故事 ----只知其一，不知其二；或者说：知其然不知其所以然。 3、犯用人之忌！（1）用老乡 a、老乡老乡，背后一枪 b、老乡靠得住，母猪能上树（2）用老婆老婆做出纳，管住了钱还有什么没有管住？ 4、四大认识误区最害人，现在明白来得及。三、消灭财务黑洞之道（一）练就消灭财务黑洞的上乘功法 1、五个前提条件 2、织网与补网，你做何选择？ 3、审查方法介绍（1）业务循环审查法（2）五大审查技术方法介绍（二）四级定位防范财务黑洞咨询系统介绍 A、消灭财务黑洞咨询服务方法 1、发现财务黑洞是一项复杂的系统专业工程 2、抓住8大高发点，以点带面，寻根探源，让财务黑洞无可逃遁。 B、四级定位图介绍?? ? 1级：人（财务）行，制度、流程也行解决办法：执行偏差的案例 2级：人（财务）行，制度流程不行 3级：人（财务）不行，制度流程行 4级：人（财务）不行，制度流程也不行案例：理清了一团乱麻四、警惕财务黑洞的变种病毒案例1：外派黑洞：养虎为患案例2：材料黑洞：空运费大于机器价值案例案例3：保密黑洞：老板被敲诈案例4：收购公司黑洞案例5：某公司海外上市劫 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 【讲师介绍】邓鸿中国企业财务黑洞问题诊断与防范行家，消灭财务黑洞专题研究第一人 --深圳市福中达投资控股有限公司财务总监 --深圳市多丽电子商务产业园财务顾问 --亚太集团会计师事务所有限公司深圳所合伙人亚太集团会计师事务所有限公司深圳所注册会计师、执业年限12年、会计、审计、财务管理岗位及顾问工作从业年限28年。资深注册会计师、香港城市大学国际会计硕士，亚太集团会计师事务所有限公司深圳总部合伙人。企业各类财务漏洞、财务黑洞问题的咨询诊断与防范行家。资深财务管理、审计、咨询从业者，担任过多家企业财务顾问，从事企业财务管理、咨询和投融资工作达二十多年, 具有较强的综合协调沟通问题能力，主持及参与的项目达三位数以上，具有较为丰富的财务管理、企业投融资、审计、评估、税收筹划、财务税收顾问经验。 ? ? 熟悉国家财务制度和相关政策法规，熟悉国家税收法律法规，熟悉公司改制及上市制度及程序、熟悉财政、税务、工商、劳动人事等政府各部门办事程序及方法，熟悉银行等金融机构投融资技巧并有一定的投融资渠道。有较强的文字功力，能将工作中发现的问题及改进办法整理发表，曾在中国著名《财经》杂志、《会计月刊》、《公司金融》等报刊杂志上发表百多篇文章，《公司金融》杂志更是开辟专栏连载财务黑洞研究方面的系列文章。本人的经验总结性文章《财务黑洞案例实录》在中国会计界最高学府“国家会计学院”“中国会计视野”网站发表一天就达2500多浏览量，创该站记录，时至今日热度不减，第二天就已被收入“中国会计视野”精品文库，仅该网站网友留言就达200多条，转载网站达几万家，上至企业老板，下至大学学生都将该文当做教科书，备受关注和引发热议。在《公司金融》（国内统一刊号：CN44-1563/F 国际标准连续出版刊号：ISSN 1671-6728）杂志上连载的文章有： 1、《私募融资背后的商业谎言》 2009年10月1日总第42期 2、财务黑洞启示录（一）--《内外账的老思维要不得了》 2009年11月1日总第44期 3、财务黑洞启示录（二）--《单据丢失酝酿严重税务后果》2009年11月16日总第45期 4、财务黑洞启示录（三）--《表述模糊引发十年官司》 2009年12月1日总第46期 5、财务黑洞启示录（四）--《合同纠纷背后的货款欺诈陷阱》2010年1月1日总第48期 6、财务黑洞启示录（五）--《友情信任反成投资陷阱》 2010年1月16日总第49期 7、财务黑洞启示录（六）--《资产收购中隐藏的猫腻》 2010年2月1日总第50期培训风格 1.邓鸿老师有很强的现场亲和力、敏锐的学员洞察力以及丰富的授课经验，了解成年人学习的特点，把复杂的问题说得通俗易懂。 2.授课风格既稳重，但又不乏幽默和风趣，采用多样化的互动授课方式，营造轻松愉快的学习气氛，充分调动学员的听课积极性。 3.授课内容既有理论深度，又注重实用效果，使学员在培训后，能在工作中解决实际问题，体现培训真正的价值。培训现场互动性很强，有很强的控场能力，倡导“家常式的互动性强”的授课理念。邓老师提倡实用、实在、实际、实战的培训风格，用专业、专注、方向、方法凝聚学员的满意。 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 深.圳报.名.热.线：０７５５- - ６１.２８.２５.７１陈小姐上.海报.名.热.线: ０２１- - ５１.８７.３７.０８张先生温馨提示:(每期限40人,如需参加请提前预定) QQ订位!-1078861118 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ ▲请将以下报名表内容填写后发送到：chinasypx(a)foxmail.xn--com-s18docw0dhtoqp48a05g9vuvzhmss763etxf01o3s3g! 　　　　　　　　　　　报名回执表　　我单位共_______人报.名参加财务黑洞无情-消灭漏洞有道 4月13-14日深圳□ 4月20-21日上海□ 4月27-28日北京□ 单位名称：_____________________________________________ 联系人：_____________ 联系电话：_______________ 手机：_______________ 图文传真：_____________ 电子信箱：_____________________________________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 总费用：___________ 元整。付款方式：□ 现金　□ 支票　□ 转帐　　（请选择打“√”）备注: 1.请您把报名回执认真填好后回传我司，为确保您报名无误,请您再次电话确认! 2.本课程可根据企业需要组织内训。

13 years, 8 months

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[GIT PULL]: dma-buf updates for 3.4

by Sumit Semwal

Hi Linus, Could you please pull the dma-buf updates for 3.4? This includes the following key items: - kernel cpu access support, - flag-passing to dma_buf_fd, - relevant Documentation updates, and - some minor cleanups and fixes. These changes are needed for the drm prime/dma-buf interface code that Dave Airlie plans to submit in this merge window. Thanks, and best regards, ~Sumit. The following changes since commit c16fa4f2ad19908a47c63d8fa436a1178438c7e7: Linux 3.3 (2012-03-18 16:15:34 -0700) are available in the git repository at: git://git.linaro.org/people/sumitsemwal/linux-dma-buf.git for-linus-3.4 Daniel Vetter (3): dma-buf: don't hold the mutex around map/unmap calls dma-buf: add support for kernel cpu access dma_buf: Add documentation for the new cpu access support Dave Airlie (1): dma-buf: pass flags into dma_buf_fd. Laurent Pinchart (4): dma-buf: Constify ops argument to dma_buf_export() dma-buf: Remove unneeded sanity checks dma-buf: Return error instead of using a goto statement when possible dma-buf: Move code out of mutex-protected section in dma_buf_attach() Rob Clark (2): dma-buf: add get_dma_buf() dma-buf: document fd flags and O_CLOEXEC requirement Sumit Semwal (2): dma-buf: add dma_data_direction to unmap dma_buf_op dma-buf: correct dummy function declarations. Documentation/dma-buf-sharing.txt | 120 ++++++++++++++++++++++++++- drivers/base/dma-buf.c | 165 +++++++++++++++++++++++++++++++------ include/linux/dma-buf.h | 97 +++++++++++++++++++-- 3 files changed, 345 insertions(+), 37 deletions(-)

13 years, 8 months

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消灭财务黑洞 !

by 财务黑洞

财务黑洞无情-消灭漏洞有道【培训时间】2012年4月13-14日深圳 4月20-21日上海 4月27-28日北京 6月9-10日深圳 6月15-16日上海 7月6-7日北京【培训对象】公司股东、董事长、经理以及企业其他中高层管理人员。【培训费用】￥2800元/人（提供讲义、午餐、发票、茶点等） ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 【课程背景】邓老师告诉你：如何发现财务健康的DNA密码如何做到：消灭财务漏洞避免财务黑洞确保经营成果中国企业财务黑洞问题诊断与防范行家，消灭财务黑洞专题研究第一人。用百度搜索“消灭财务漏洞”6个字达260多万条，影响巨大！用谷歌搜索“邓鸿老师”4个字达到1000多万条，是否徒有虚名？培训目标： 1、企业财务黑洞是由多方面因素造成的，财务黑洞的封杀要有专业指导、丰富的实践经验和恰当的方式方法。 2、企业的财务工作好坏不单只是财务部的事情，是企业综合管理水平的体现。邓老师以自己多年所经历的，许多老板用昂贵的金钱甚至是生命为代价所换来的丰富案例，策您警醒，让你吃人家之堑长自己之智。 3、经常听到会计人员抱怨：老板不重视财务。你不妨请你的老板来听一场邓老师的《消灭财务黑洞》的课程，也许是你送给老板的最好礼物！也是给自己工作的最好帮助；经常听到我们的会计抱怨：同事不配合、不理解、不支持我们的财务工作。你不妨建议老板请邓老师去给你的公司全体员工上一堂《消灭财务黑洞》的课程，你的工作环境是不是会得到显著改善？你不妨试一试？课程100%为落地可操作的方法与工具，绝对实战、实效、实用！授课方式：专题讲授、互动交流、案例分析 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 【课程大纲】序言： 1、什么是黑洞？ 2、什么是财务黑洞？ 3、织网与补网一、财务黑洞的八大原发病毒（一）收款黑洞 1、常规收款手段为什么失效？ 2、货款要不回为什么还要倒赔钱？ 3、案例：合同纠纷背后的货款欺诈陷阱 4、消灭财务黑洞： A、结合案件一些证据和日常单据明白问题在哪里？ B、如何解决和防范诊断出来的问题？（二）付款黑洞 1、公司有没有资金紧张的时候？资金紧张怎么办？你是怎么做的？为什么说你的做法是错误的，是在自己制造财务黑洞，或者说是自掘陷阱！ 2、错误表现在两个极端：（1）一个极端是忽悠、再忽悠（有的）到骗；（2）另一个极端是扛、死扛、扛到死，把自己弄得很悲壮 3、消灭财务黑洞：（1）惨淡经营、死扛、扛到死有没有必要？（2）提供两种解决办法，供参考：办法一、你能不能挑出可以帮助你暂时渡过难关的那些供应商？暂时继续占用一下人家的资金。办法二、有没有第三条路可走？第三条路怎么走？案例：企业暂停经营撇债（三）税务黑洞 1、内外两套账，为什么税务一查一个准？ 2、是什么原因？因为有三道坎迈不过去：第一道坎：合同与账本，两张皮不黏！第二道坎：资金账户似迷宫，剪不断来理还乱第三道坎：账实要相符，神仙也犯难 3、面对三道坎，你是不是就束手无策？消灭财务黑洞，道在哪里？案例：桌上放收款单据的故事的后续故事（四）投资黑洞 1、投资前-- 练就火眼金睛问题：（1）没有看清合作方，搞清楚其真实意图，让表面现象所迷惑；（2）对产权状况不清，盲目投资；（3）公司收购的两大猫腻如何识破猫腻？避免陷于巨大财务黑洞？ 2、投资合作中-- 给我一双慧眼，不要聪明人办傻事问题：（1）是投资入股还是借款？（2）问题形成后处理方法要得当 3、投资后-- 半睁半闭眼睛，要吃小亏避免上大当。（五）融资黑洞 1、不懂融资，要多作功课，不要犯吃饭不看菜，裁衣不量体常识错误。表现： 1、喜欢包装，“临时抱佛脚” 2、盲目相信中介，迷信能人和关系功课之一：企业所处的发展阶段不同融资渠道有别功课之二：用好企业现有的有效资源是融资的关键。功课之三：认识资金和其能够提供的金融产品，不要做瞎子摸象 2、为了融资而融资，一条道走到黑表现： a、抛开实业玩概念； b、盲目相信过度包装。 3、企业在融资时如何防骗？（六）沟通黑洞 1、采购绑架财务 2、销售尾巴何其多？某物业管理公司的案例三招解决公司沟通黑洞（七）成本黑洞 1、企业成本核算的基本要求 2、案例：原材料成本 X 2 = 销售价的故事（八）管理黑洞 1、会计由谁来招聘？人事部和老板招聘的会计有什么错？ 2、会计工作能不能胜任由谁来考察？ 3、会计经常换有什么严重后果？ 4、账实严重不相符谁之过？ 5、案例：（1）逾期未提交出口单据，税局认定“内销”，补税和滞纳金等500多万元。（2）单据不齐，1000余万出口退税遇阻。二、财务黑洞根源探究 1、曲突徙薪亡恩泽，焦头烂额为上客。 ----忙救火，疏预防 2、麦克唐纳牧师的故事 ----只知其一，不知其二；或者说：知其然不知其所以然。 3、犯用人之忌！（1）用老乡 a、老乡老乡，背后一枪 b、老乡靠得住，母猪能上树（2）用老婆老婆做出纳，管住了钱还有什么没有管住？ 4、四大认识误区最害人，现在明白来得及。三、消灭财务黑洞之道（一）练就消灭财务黑洞的上乘功法 1、五个前提条件 2、织网与补网，你做何选择？ 3、审查方法介绍（1）业务循环审查法（2）五大审查技术方法介绍（二）四级定位防范财务黑洞咨询系统介绍 A、消灭财务黑洞咨询服务方法 1、发现财务黑洞是一项复杂的系统专业工程 2、抓住8大高发点，以点带面，寻根探源，让财务黑洞无可逃遁。 B、四级定位图介绍?? ? 1级：人（财务）行，制度、流程也行解决办法：执行偏差的案例 2级：人（财务）行，制度流程不行 3级：人（财务）不行，制度流程行 4级：人（财务）不行，制度流程也不行案例：理清了一团乱麻四、警惕财务黑洞的变种病毒案例1：外派黑洞：养虎为患案例2：材料黑洞：空运费大于机器价值案例案例3：保密黑洞：老板被敲诈案例4：收购公司黑洞案例5：某公司海外上市劫 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 【讲师介绍】邓鸿中国企业财务黑洞问题诊断与防范行家，消灭财务黑洞专题研究第一人 --深圳市福中达投资控股有限公司财务总监 --深圳市多丽电子商务产业园财务顾问 --亚太集团会计师事务所有限公司深圳所合伙人亚太集团会计师事务所有限公司深圳所注册会计师、执业年限12年、会计、审计、财务管理岗位及顾问工作从业年限28年。资深注册会计师、香港城市大学国际会计硕士，亚太集团会计师事务所有限公司深圳总部合伙人。企业各类财务漏洞、财务黑洞问题的咨询诊断与防范行家。资深财务管理、审计、咨询从业者，担任过多家企业财务顾问，从事企业财务管理、咨询和投融资工作达二十多年, 具有较强的综合协调沟通问题能力，主持及参与的项目达三位数以上，具有较为丰富的财务管理、企业投融资、审计、评估、税收筹划、财务税收顾问经验。 ? ? 熟悉国家财务制度和相关政策法规，熟悉国家税收法律法规，熟悉公司改制及上市制度及程序、熟悉财政、税务、工商、劳动人事等政府各部门办事程序及方法，熟悉银行等金融机构投融资技巧并有一定的投融资渠道。有较强的文字功力，能将工作中发现的问题及改进办法整理发表，曾在中国著名《财经》杂志、《会计月刊》、《公司金融》等报刊杂志上发表百多篇文章，《公司金融》杂志更是开辟专栏连载财务黑洞研究方面的系列文章。本人的经验总结性文章《财务黑洞案例实录》在中国会计界最高学府“国家会计学院”“中国会计视野”网站发表一天就达2500多浏览量，创该站记录，时至今日热度不减，第二天就已被收入“中国会计视野”精品文库，仅该网站网友留言就达200多条，转载网站达几万家，上至企业老板，下至大学学生都将该文当做教科书，备受关注和引发热议。在《公司金融》（国内统一刊号：CN44-1563/F 国际标准连续出版刊号：ISSN 1671-6728）杂志上连载的文章有： 1、《私募融资背后的商业谎言》 2009年10月1日总第42期 2、财务黑洞启示录（一）--《内外账的老思维要不得了》 2009年11月1日总第44期 3、财务黑洞启示录（二）--《单据丢失酝酿严重税务后果》2009年11月16日总第45期 4、财务黑洞启示录（三）--《表述模糊引发十年官司》 2009年12月1日总第46期 5、财务黑洞启示录（四）--《合同纠纷背后的货款欺诈陷阱》2010年1月1日总第48期 6、财务黑洞启示录（五）--《友情信任反成投资陷阱》 2010年1月16日总第49期 7、财务黑洞启示录（六）--《资产收购中隐藏的猫腻》 2010年2月1日总第50期培训风格 1.邓鸿老师有很强的现场亲和力、敏锐的学员洞察力以及丰富的授课经验，了解成年人学习的特点，把复杂的问题说得通俗易懂。 2.授课风格既稳重，但又不乏幽默和风趣，采用多样化的互动授课方式，营造轻松愉快的学习气氛，充分调动学员的听课积极性。 3.授课内容既有理论深度，又注重实用效果，使学员在培训后，能在工作中解决实际问题，体现培训真正的价值。培训现场互动性很强，有很强的控场能力，倡导“家常式的互动性强”的授课理念。邓老师提倡实用、实在、实际、实战的培训风格，用专业、专注、方向、方法凝聚学员的满意。 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ 主办单位:中国商业培训网深.圳报.名.热.线：０７５５- - ６１.２８.２５.７１陈小姐上.海报.名.热.线: ０２１- - ５１.８７.３７.０８张先生温馨提示:(每期限40人,如需参加请提前预定) QQ订位!-1078861118 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ ▲请将以下报名表内容填写后发送到：chinasypx(a)foxmail.xn--com-s18docw0dhtoqp48a05g9vuvzhmss763etxf01o3s3g! 　　　　　　　　　　　报名回执表　　我单位共_______人报.名参加财务黑洞无情-消灭漏洞有道 4月13-14日深圳□ 4月20-21日上海□ 4月27-28日北京□ 单位名称：_____________________________________________ 联系人：_____________ 联系电话：_______________ 手机：_______________ 图文传真：_____________ 电子信箱：_____________________________________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 参会人：_____________ 总费用：___________ 元整。付款方式：□ 现金　□ 支票　□ 转帐　　（请选择打“√”）备注: 1.请您把报名回执认真填好后回传我司，为确保您报名无误,请您再次电话确认! 2.本课程可根据企业需要组织内训。

13 years, 8 months

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企业税务稽查★规避技巧

by 稽查组

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13 years, 8 months

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[PATCH] dma-buf: Correct dummy function declarations.

by Sumit Semwal

While testing, I found that we need to correct some of the dummy declarations. When I send my pull request to Linus, I wish to squash these changes into the original patches from Daniel. Could you please review? Best regards, ~Sumit ========= Dummy functions for the newly added cpu access ops are needed for compilation when dma-buf framework is not compiled-in. Also, the introduction of flags in dma_buf_fd needs to be added to dummy functions as well. Signed-off-by: Sumit Semwal <sumit.semwal(a)linaro.org> --- include/linux/dma-buf.h | 26 +++++++++++++------------- 1 files changed, 13 insertions(+), 13 deletions(-) diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index f08028e..779aaf9 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -189,7 +189,7 @@ static inline struct dma_buf *dma_buf_export(void *priv, return ERR_PTR(-ENODEV); } -static inline int dma_buf_fd(struct dma_buf *dmabuf) +static inline int dma_buf_fd(struct dma_buf *dmabuf, int flags) { return -ENODEV; } @@ -216,36 +216,36 @@ static inline void dma_buf_unmap_attachment(struct dma_buf_attachment *attach, return; } -static inline int dma_buf_begin_cpu_access(struct dma_buf *, - size_t, size_t, - enum dma_data_direction) +static inline int dma_buf_begin_cpu_access(struct dma_buf *dmabuf, + size_t start, size_t len, + enum dma_data_direction dir) { return -ENODEV; } -static inline void dma_buf_end_cpu_access(struct dma_buf *, - size_t, size_t, - enum dma_data_direction) +static inline void dma_buf_end_cpu_access(struct dma_buf *dmabuf, + size_t start, size_t len, + enum dma_data_direction dir) { } -static inline void *dma_buf_kmap_atomic(struct dma_buf *, unsigned long) +static inline void *dma_buf_kmap_atomic(struct dma_buf *db, unsigned long pnum) { return NULL; } -static inline void dma_buf_kunmap_atomic(struct dma_buf *, unsigned long, - void *) +static inline void dma_buf_kunmap_atomic(struct dma_buf *db, unsigned long pnum, + void *vaddr) { } -static inline void *dma_buf_kmap(struct dma_buf *, unsigned long) +static inline void *dma_buf_kmap(struct dma_buf *db, unsigned long pnum) { return NULL; } -static inline void dma_buf_kunmap(struct dma_buf *, unsigned long, - void *) +static inline void dma_buf_kunmap(struct dma_buf *db, unsigned long pnum, + void *vaddr) { } #endif /* CONFIG_DMA_SHARED_BUFFER */ -- 1.7.5.4

13 years, 8 months

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dma-buf pull request content

by Sumit Semwal

Hello all, I intend to send the pull request to Linus by Monday - the set below looks to me to be the current content that it'd have on top of 3.3. [You can view this in for-next branch at git://git.linaro.org/people/sumitsemwal/linux-dma-buf.git] I think I could take the userspace mmap patch if we reach a consensus on which one to take (Rob's?, Daniel's?) - I guess we are most likely to agree on Daniel's, with possibly the suggestion from Rob about including IOCTLS but leaving them out of dmabuf ops for this release. Daniel, Rob: would you think I can have an agreed-upon patch by tomorrow afternoon? Then I could push it into for-next by tomorrow, and send a pull request by Monday? Also, if you think I've missed out something, please let me know. Daniel Vetter (3): dma-buf: don't hold the mutex around map/unmap calls dma-buf: add support for kernel cpu access dma_buf: Add documentation for the new cpu access support Dave Airlie (1): dma-buf: pass flags into dma_buf_fd. Laurent Pinchart (4): dma-buf: Constify ops argument to dma_buf_export() dma-buf: Remove unneeded sanity checks dma-buf: Return error instead of using a goto statement when possible dma-buf: Move code out of mutex-protected section in dma_buf_attach() Rob Clark (2): dma-buf: add get_dma_buf() dma-buf: document fd flags and O_CLOEXEC requirement Sumit Semwal (1): dma-buf: add dma_data_direction to unmap dma_buf_op -- Thanks and regards, Sumit Semwal Linaro Kernel Engineer - Graphics working group Linaro.org │ Open source software for ARM SoCs

13 years, 9 months

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[PATCH] dma-buf: document fd flags and O_CLOEXEC requirement

by Rob Clark

From: Rob Clark <rob(a)ti.com> Otherwise subsystems will get this wrong and end up with a second export ioctl with the flag and O_CLOEXEC support added. Signed-off-by: Rob Clark <rob(a)ti.com> Reviewed-by: Daniel Vetter <daniel.vetter(a)ffwll.ch> --- Updated version of Daniel's original documentation patch with (hopefully) improved wording, and a better description of the motivation. Documentation/dma-buf-sharing.txt | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/Documentation/dma-buf-sharing.txt b/Documentation/dma-buf-sharing.txt index 225f96d..3b51134 100644 --- a/Documentation/dma-buf-sharing.txt +++ b/Documentation/dma-buf-sharing.txt @@ -223,6 +223,24 @@ Miscellaneous notes: - Any exporters or users of the dma-buf buffer sharing framework must have a 'select DMA_SHARED_BUFFER' in their respective Kconfigs. +- In order to avoid fd leaks on exec, the FD_CLOEXEC flag must be set + on the file descriptor. This is not just a resource leak, but a + potential security hole. It could give the newly exec'd application + access to buffers, via the leaked fd, to which it should otherwise + not be permitted access. + + The problem with doing this via a separate fcntl() call, versus doing it + atomically when the fd is created, is that this is inherently racy in a + multi-threaded app[3]. The issue is made worse when it is library code + opening/creating the file descriptor, as the application may not even be + aware of the fd's. + + To avoid this problem, userspace must have a way to request O_CLOEXEC + flag be set when the dma-buf fd is created. So any API provided by + the exporting driver to create a dmabuf fd must provide a way to let + userspace control setting of O_CLOEXEC flag passed in to dma_buf_fd(). + References: [1] struct dma_buf_ops in include/linux/dma-buf.h [2] All interfaces mentioned above defined in include/linux/dma-buf.h +[3] https://lwn.net/Articles/236486/ -- 1.7.5.4

13 years, 9 months

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[PATCH 1/4] dma-buf: don't hold the mutex around map/unmap calls

by Daniel Vetter

The mutex protects the attachment list and hence needs to be held around the callbakc to the exporters (optional) attach/detach functions. Holding the mutex around the map/unmap calls doesn't protect any dma_buf state. Exporters need to properly protect any of their own state anyway (to protect against calls from their own interfaces). So this only makes the locking messier (and lockdep easier to anger). Therefore let's just drop this. v2: Rebased on top of latest dma-buf-next git. Signed-off-by: Daniel Vetter <daniel.vetter(a)ffwll.ch> Reviewed-by: Rob Clark <rob.clark(a)linaro.org> --- drivers/base/dma-buf.c | 5 ----- include/linux/dma-buf.h | 2 +- 2 files changed, 1 insertions(+), 6 deletions(-) diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c index 3c8c023..5641b9c 100644 --- a/drivers/base/dma-buf.c +++ b/drivers/base/dma-buf.c @@ -258,9 +258,7 @@ struct sg_table *dma_buf_map_attachment(struct dma_buf_attachment *attach, if (WARN_ON(!attach || !attach->dmabuf)) return ERR_PTR(-EINVAL); - mutex_lock(&attach->dmabuf->lock); sg_table = attach->dmabuf->ops->map_dma_buf(attach, direction); - mutex_unlock(&attach->dmabuf->lock); return sg_table; } @@ -282,10 +280,7 @@ void dma_buf_unmap_attachment(struct dma_buf_attachment *attach, if (WARN_ON(!attach || !attach->dmabuf || !sg_table)) return; - mutex_lock(&attach->dmabuf->lock); attach->dmabuf->ops->unmap_dma_buf(attach, sg_table, direction); - mutex_unlock(&attach->dmabuf->lock); - } EXPORT_SYMBOL_GPL(dma_buf_unmap_attachment); diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index bc4203dc..24e0f48 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -88,7 +88,7 @@ struct dma_buf { struct file *file; struct list_head attachments; const struct dma_buf_ops *ops; - /* mutex to serialize list manipulation and other ops */ + /* mutex to serialize list manipulation and attach/detach */ struct mutex lock; void *priv; }; -- 1.7.7.5

13 years, 9 months

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[PATCH] [RFC] dma-buf: mmap support

by Daniel Vetter

Let's have some competition here for dma_buf mmap support ;-) Compared to Rob Clarke's RFC I've ditched the prepare/finish hooks and corresponding ioctls on the dma_buf file. The major reason for that is that many people seem to be under the impression that this is also for synchronization with outstanding asynchronous processsing. I'm pretty massively opposed to this because: - It boils down reinventing a new rather general-purpose userspace synchronization interface. If we look at things like futexes, this is hard to get right. - Furthermore a lot of kernel code has to interact with this synchronization primitive. This smells a look like the dri1 hw_lock, a horror show I prefer not to reinvent. - Even more fun is that multiple different subsystems would interact here, so we have plenty of opportunities to create funny deadlock scenarios. I think synchronization is a wholesale different problem from data sharing and should be tackled as an orthogonal problem. Now we could demand that prepare/finish may only ensure cache coherency (as Rob intended), but that runs up into the next problem: We not only need mmap support to facilitate sw-only processing nodes in a pipeline (without jumping through hoops by importing the dma_buf into some sw-access only importer), which allows for a nicer ION->dma-buf upgrade path for existing Android userspace. We also need mmap support for existing importing subsystems to support existing userspace libraries. And a loot of these subsystems are expected to export coherent userspace mappings. So prepare/finish can only ever be optional and the exporter /needs/ to support coherent mappings. Given that mmap access is always somewhat fallback-y in nature I've decided to drop this optimization, instead of just making it optional. If we demonstrate a clear need for this, supported by benchmark results, we can always add it in again later as an optional extension. Other differences compared to Rob's RFC is the above mentioned support for mapping a dma-buf through facilities provided by the importer. Which results in mmap support no longer being optional. Note taht this dma-buf mmap patch does _not_ support every possible insanity an existing subsystem could pull of with mmap: Because it does not allow to intercept pagefaults and shoot down ptes importing subsystems can't add some magic of their own at these points (e.g. to automatically synchronize with outstanding rendering or set up some special resources). I've done a cursory read through a few mmap implementions of various subsytems and I'm hopeful that we can avoid this (and the complexity it'd bring with it). Additonally I've extended the documentation a bit to explain the hows and whys of this mmap extension. Comments, reviews and flames highly welcome. Cheers, Daniel --- Documentation/dma-buf-sharing.txt | 84 +++++++++++++++++++++++++++++++++--- drivers/base/dma-buf.c | 64 +++++++++++++++++++++++++++- include/linux/dma-buf.h | 16 +++++++ 3 files changed, 156 insertions(+), 8 deletions(-) diff --git a/Documentation/dma-buf-sharing.txt b/Documentation/dma-buf-sharing.txt index a6d4c37..c42a4a5 100644 --- a/Documentation/dma-buf-sharing.txt +++ b/Documentation/dma-buf-sharing.txt @@ -29,13 +29,6 @@ The buffer-user in memory, mapped into its own address space, so it can access the same area of memory. -*IMPORTANT*: [see https://lkml.org/lkml/2011/12/20/211 for more details] -For this first version, A buffer shared using the dma_buf sharing API: -- *may* be exported to user space using "mmap" *ONLY* by exporter, outside of - this framework. -- with this new iteration of the dma-buf api cpu access from the kernel has been - enable, see below for the details. - dma-buf operations for device dma only -------------------------------------- @@ -313,6 +306,83 @@ Access to a dma_buf from the kernel context involves three steps: enum dma_data_direction dir); +Direct Userspace Access/mmap Support +------------------------------------ + +Being able to mmap an export dma-buf buffer object has 2 main use-cases: +- CPU fallback processing in a pipeline and +- supporting existing mmap interfaces in importers. + +1. CPU fallback processing in a pipeline + + In many processing pipelines it is sometimes required that the cpu can access + the data in a dma-buf (e.g. for thumbnail creation, snapshots, ...). To avoid + the need to handle this specially in userspace frameworks for buffer sharing + it's ideal if the dma_buf fd itself can be used to access the backing storage + from userspace using mmap. + + Furthermore Android's ION framework already supports this (and is otherwise + rather similar to dma-buf from a userspace consumer side with using fds as + handles, too). So it's beneficial to support this in a similar fashion on + dma-buf to have a good transition path for existing Android userspace. + + No special interfaces, userspace simply calls mmap on the dma-buf fd. + +2. Supporting existing mmap interfaces in exporters + + Similar to the motivation for kernel cpu access it is again important that + the userspace code of a given importing subsystem can use the same interfaces + with a imported dma-buf buffer object as with a native buffer object. This is + especially important for drm where the userspace part of contemporary OpenGL, + X, and other drivers is huge, and reworking them to use a different way to + mmap a buffer rather invasive. + + The assumption in the current dma-buf interfaces is that redirecting the + initial mmap is all that's needed. A survey of some of the existing + subsystems shows that no driver seems to do any nefarious thing like syncing + up with outstanding asynchronous processing on the device or allocating + special resources at fault time. So hopefully this is good enough, since + adding interfaces to intercept pagefaults and allow pte shootdowns would + increase the complexity quite a bit. + + Interface: + int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *, + unsigned long); + + If the importing subsystem simply provides a special-purpose mmap call to set + up a mapping in userspace, calling do_mmap with dma_buf->file will equally + achieve that for a dma-buf object. + +3. Implementation notes for exporters + + Because dma-buf buffers have invariant size over their lifetime, the dma-buf + core checks whether a vma is too large and rejects such mappings. The + exporter hence does not need to duplicate this check. + + Because existing importing subsystems might presume coherent mappings for + userspace, the exporter needs to set up a coherent mapping. If that's not + possible, it needs to fake coherency by manually shooting down ptes when + leaving the cpu domain and flushing caches at fault time. Note that all the + dma_buf files share the same anon inode, hence the exporter needs to replace + the dma_buf file stored in vma->vm_file with it's own if pte shootdown is + requred. This is because the kernel uses the underlying inode's address_space + for vma tracking (and hence pte tracking at shootdown time with + unmap_mapping_range). + + If the above shootdown dance turns out to be too expensive in certain + scenarios, we can extend dma-buf with a more explicit cache tracking scheme + for userspace mappings. But the current assumption is that using mmap is + always a slower path, so some inefficiencies should be acceptable. + + Exporters that shoot down mappings (for any reasons) shall not do any + synchronization at fault time with outstanding device operations. + Synchronization is an orthogonal issue to sharing the backing storage of a + buffer and hence should not be handled by dma-buf itself. This is explictly + mentioned here because many people seem to want something like this, but if + different exporters handle this differently, buffer sharing can fail in + interesting ways depending upong the exporter (if userspace starts depending + upon this implicit synchronization). + Miscellaneous notes ------------------- diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c index 07cbbc6..f3b923c 100644 --- a/drivers/base/dma-buf.c +++ b/drivers/base/dma-buf.c @@ -44,8 +44,26 @@ static int dma_buf_release(struct inode *inode, struct file *file) return 0; } +static int dma_buf_mmap_internal(struct file *file, struct vm_areat_struct *vma) +{ + struct dma_buf *dmabuf; + + if (!is_dma_buf_file(file)) + return -EINVAL; + + /* check for overflowing the buffer's size */ + if (vma->vm_pgoff + ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) > + dmabuf->size >> PAGE_SHIFT) + return -EINVAL; + + dmabuf = file->private_data; + + return dmabuf->ops->mmap(dmabuf, vma); +} + static const struct file_operations dma_buf_fops = { .release = dma_buf_release, + .mmap = dma_buf_mmap_internal, }; /* @@ -82,7 +100,8 @@ struct dma_buf *dma_buf_export(void *priv, const struct dma_buf_ops *ops, || !ops->unmap_dma_buf || !ops->release || !ops->kmap_atomic - || !ops->kmap)) { + || !ops->kmap + || !ops->mmap)) { return ERR_PTR(-EINVAL); } @@ -406,3 +425,46 @@ void dma_buf_kunmap(struct dma_buf *dmabuf, unsigned long page_num, dmabuf->ops->kunmap(dmabuf, page_num, vaddr); } EXPORT_SYMBOL_GPL(dma_buf_kunmap); + + +/** + * dma_buf_mmap - Setup up a userspace mmap with the given vma + * @dma_buf: [in] buffer that should back the vma + * @vma: [in] vma for the mmap + * @pgoff: [in] offset in pages where this mmap should start within the + * dma-buf buffer. + * + * This function adjusts the passed in vma so that it points at the file of the + * dma_buf operation. It alsog adjusts the starting pgoff and does bounds + * checking on the size of the vma. Then it calls the exporters mmap function to + * set up the mapping. + * + * Can return negative error values, returns 0 on success. + */ +int dma_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma, + unsigned long pgoff) +{ + if (WARN_ON(!dmabuf || !vma)) + return -EINVAL; + + /* check for offset overflow */ + if (pgoff + ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) < pgoff) + return -EOVERFLOW; + + /* check for overflowing the buffer's size */ + if (pgoff + ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) > + dmabuf->size >> PAGE_SHIFT) + return -EINVAL; + + /* readjust the vma */ + if (vma->vm_file) + fput(vma->vm_file); + + vma->vm_file = dmabuf->file; + get_file(vma->vm_file); + + vma->vm_pgoff = pgoff; + + return dmabuf->ops->mmap(dmabuf, vma); +} +EXPORT_SYMBOL_GPL(dma_buf_mmap); diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index ee7ef99..d254630 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -61,6 +61,10 @@ struct dma_buf_attachment; * This Callback must not sleep. * @kmap: maps a page from the buffer into kernel address space. * @kunmap: [optional] unmaps a page from the buffer. + * @mmap: used to expose the backing storage to userspace. Note that the + * mapping needs to be coherent - if the exporter doesn't directly + * support this, it needs to fake coherency by shooting down any ptes + * when transitioning away from the cpu domain. */ struct dma_buf_ops { int (*attach)(struct dma_buf *, struct device *, @@ -92,6 +96,8 @@ struct dma_buf_ops { void (*kunmap_atomic)(struct dma_buf *, unsigned long, void *); void *(*kmap)(struct dma_buf *, unsigned long); void (*kunmap)(struct dma_buf *, unsigned long, void *); + + int (*mmap)(struct dma_buf *, struct vm_area_struct *vma); }; /** @@ -167,6 +173,9 @@ void *dma_buf_kmap_atomic(struct dma_buf *, unsigned long); void dma_buf_kunmap_atomic(struct dma_buf *, unsigned long, void *); void *dma_buf_kmap(struct dma_buf *, unsigned long); void dma_buf_kunmap(struct dma_buf *, unsigned long, void *); + +int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *, + unsigned long); #else static inline struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, @@ -247,6 +256,13 @@ static inline void dma_buf_kunmap(struct dma_buf *, unsigned long, void *) { } + +static inline int dma_buf_mmap(struct dma_buf *, + struct vm_area_struct *vma, + unsigned long pgoff) +{ + return -ENODEV; +} #endif /* CONFIG_DMA_SHARED_BUFFER */ #endif /* __DMA_BUF_H__ */ -- 1.7.7.5

13 years, 9 months

4
7
0 0

税务风险~规避技~巧与实务

by 企业税务稽查

��ҵ˰��˰��չ�ܼ��ʵ�� ʱ��ص㣺2012��4��19-20��Ϻ� 2012��4��26-27�ձ�� 2012��4��28-29�� γ̷��ã�2800Ԫ/�ˣ��Ϸѡ��ͼ��ȣ� �ڿζ��󣺲��ܾ��Լ��߼��Ӫ��Ա;��ܼࡢ��ܡ� ˰��˰��ܡ��ʻ�ơ�˰��ƵȾ��ʿ�� ԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡ� �� : ˰��ҵ��Ե�һ����ܶ��ҵ��ǰ��˰��ơ��ص㣻�� ҵΪʲô�ᱻ��顢��鲿��Ҫ��ʲô��ô�飿��ĳ��ֻ�ʹ��ҵ��ټ�� ˰��գ� ��2011��ҵ˰��˰��չ�ܼ��ʵ�񡷿γ��Ҫ��⣺ 1��Ϊʲô��ǵ��ҵ�ᱻ��飿��ǵ��ҵû�У� 2��˰��Ҫ��ҵ�Բ飬ʲô��Բ�˰��ز��⣿ 3��ҵ��Щ��˰ҵ��Ƚ��״��⣿��Щ��ڻ��ʱ�ᱻ˰��ص��ע�� 4��Ǳ��ȥ�Ĳ��񱨱��¶��˰��⣿ 5��ڵ��ҵ��Ҫ��Щ˰��⣿ 6��˰��֤�ݵ��Ѽ��Ҫ��Щ�ֶΡ�� 7��ҵ��⣬��ǻ��ʲô��Ĵ�� Ӧ��̼��ܴ��»�С��С�»��ˣ� �ԡԡԡԡԡԡԡ� �� : 1��׼ȷ��ҵ��ٵ�˰��ƣ� 2��˰��鹤��Ļ��򡢻��֪��֪�ˣ��ս�� 3��׼ȷ��ҵ��ٵľ��˰��⼰��ȷ�Ľ��취�� 4��޶Ƚ��˰��գ��ҵ��ʧ�� 5��˰��ǶȽ��񱨱��ǰ��˰��գ� 6��ѡ��ȷ��˰��Ӧ�Բ��ԣ�ʹ��˾�Ͳ�˰��Ա�е��С�ķ��Σ� �ԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡ� �� : ��T�� һ��֣�˰��ҵӦ�Բ��˰�� һ��˰��Ʒ�� 1��˰��飬��ҵ�ĸ��̬�� 2��˰��ĸ��ƣ� 3��2010��˰��鹤��Ļعˣ� 4��2011��˰��鹤��Ŀ�ꡢ��񼰻��ص�� ˰��뷽�� 1��ҵ��ԭ��ķ�� 2��˰��鹤��̼��鲿��ڲ�ְ�ܻ��֣� 3��˰��鰸�� 4��˰��֤��Ѽ� ��˰��۷��Ӧ�� 1��˰��е�˰�� 2��˰��Υ��Ϊ�ķ�� 3��˰��еĹ�ͨ�� 4��˰��۵ķ�� 5��Σ��صļ�� ġ��˰�� 1��˰��Ĺ��Ҫ�� 2��˰��Ļ�� 3��˰��Ĺ�� 4��˰��ԭ�� 5��˰��ķ�չ 6��ѡ��ķ�� T�� ڶ��֣��ҵ�Բ��볣��˰��Ǳ��˰��շ�� һ��˰��Բ� 1��˰��Բ鶨��붨λ 2��ҵ˰��Բ��Ӧ�Բ�� 3��Ŀ��Բ鼼�� 4��ҵ��Բ鼼�� ֵ˰ҵ�񳣼��⼰��Ҫ��鷽�� 1��˰��˳��⼰��鷽�� 2��˰��Χ��⼰��鷽�� 3��˰�ʳ��⼰��鷽�� 4��˰���⼰��鷽�� 5��˰���⼰��鷽�� 6��ֿ�ƾ֤��⼰��鷽�� 7��˰��泣��⼰��鷽�� Ӫҵ˰ҵ�񳣼��⼰��Ҫ��鷽�� 1��˰�˳��⼰��鷽�� 2��˰��Χ��˰�ʳ��⼰��鷽�� 3��˰Ӫҵ���⼰��鷽�� 4��Ŀ��⼰��鷽�� ġ��ҵ��˰ҵ�񳣼��⼰��Ҫ��鷽�� 1��Ŀ��⼰��鷽�� 2��۳��Ŀ��⼰��鷽�� 3��ʲ��⼰��鷽�� 4��˰��Żݳ��⼰��鷽�� 5��ö��⼰��鷽�� 6��Ӧ��˰���⼰��鷽�� 塢��˰ҵ�񳣼��⼰��Ҫ��鷽�� 1��˰�˳��⼰��鷽�� 2��۽��˳��⼰��鷽�� 3��˰��Χ��⼰��鷽�� 4��˰��볣��⼰��鷽�� 5��˰��볣��⼰��鷽�� 6��˰��ļ�� ˰��ҵ�񳣼��⼰��Ҫ��鷽�� 1��˰��⼰��鷽�� 2�� ˰��⼰��鷽�� 3��Դ˰��⼰��鷽�� 4��ʹ��˰��⼰��鷽�� 5��ӡ��˰��⼰��鷽�� 6��ֵ˰��⼰��鷽�� T�� ֣�˰��Ʋ��չ�� һ��˰׼�򡪻��˰��չ�� 1��Բ�� 2��ʱ�Բ�� ʲ�ҵ��׼��˰��չ�� 1��̶��ʲ� 2��ʲ� 3��ڴ�̯�� 4��Ͷ��ʲ� 5�� ׼��˰��˰�� 1��Ʒ�� 2�� 3��ö��ʲ�ʹ��Ȩ�� ġ��ɱ��û��˰��Ƚϼ��˰�� 1��̶��ʲ�֧��޷ѵĿ۳� 2��Ͷ��֧�� 3��Ӫҵ��֮��ҵ��֧�� 4��Ծ��۳� 5��ʲ��ʧ 6��Ϣ֧�� 7��Ѻ�Ӷ��Ŀ۳� �塢��ҵ��׼��˰�� 1��ǻ��ʲ�� 2��ծ�� 豸Ҫ�� 1��ֳֻ�Ͳ 2��ͶӰ�ǣ��ѵʦ�Ա�� 3��װ��װ�� ԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡ� ��T�� ʦ��: �´Ӵ��绪�˽�ʦ500ǿ��й��ѧ��̹��˶ʿ��MBA��й�ע��ʦ��CPA��ע��˰��ʦ ��CPT��й�ĿǰΨһ�ݺᡰ��˰��Դ��ս�Թ��ġ��ܡ�ʵս�ɹ��ר�� ѵʦ��й��˰�γ��󻯵�һ�ˡ��´Ӵ��ʦĿǰΪ�й��ܲ��ѵ��л��ѵ��ɹ�� Ͱ�ֱ��ҡ��ҷ�չ��ĸ�ίԱ�ᡰ��й��ί�ᡢ�۳ɻ��ѧԺ��й��ѧ ѧ��˰�ﻮʦ��֤��Ŀ��й��ҵ��ϻ��֤��Ŀ��Ƹ��ʦ��о�Ժ��Ƹ��ڡ��㽭�� ѧ�ܲðࡢ�Ϻ��ͨ��ѧ��̩��ѧԺ��ѧԺ��Ƹ��ʦ��ν��ｭ��֬��Ʒ��ܡ� ��ﻯ��˾��ܾ��ݴ󹫻��ʦ��ϯע��ʦ��Ϻ��ͨ��Ƽ��޹�˾ ��ϯ��٣�CFO��̩��ͨҩҵ��޹�˾��ܼࡣ��ͨ��ѯ��˰�ﻮ��ʱ��ҵ�ڲ� ��ƶ��ơ��Ŀ��Է��Ŀ��ʵȣ��Ⱥ�Ϊȫ��ʮ��ҵ�ṩ��ѯ��Ϊ��ټ��ҵ�� ҵ��ѵ��񣬴��ɹ��ٰ��δ��͹��Ρ��ġ��˰��չ��˰�ﻮ�� ʵս��ҵ��˰��Ӧ�Բ��Լ�ʵʩ��ĺ��˰��˰��շ��ز��ҵ�� ֵ˰��ʵ��˰�ﻮ��ɡ��и��߸��˰��˰�ﻮ��ǲ��Ĳ�� Ӧ��˿��ͻ��ù��ڲ��չ��»��׼��Ӧ�þ�Ҫ��ȫ��Ԥ�� ҵ�Ĳ��ɱ��ʤʵս��ҵ�ɱ��ơ��ղ��ʵ��˰�ﻮ�� ڲ��ڲ��Ƽ��շ��ȿγ��ҵ��ʿ�� ַ��ͻ��й��š��й�ʯ�͡��й�ʯ��й��С��й��С��ӽ��긣��š� ��ǿͳ��µ��ɽ��硢��֯���ǻ��ѹ��¡��л�� 칤��ϡ��˴Ｏ�š�ӥ�μ��š��Ƶꡢ��Ʒ��з�չ��ĸ�ίԱ�ᡢ̨��о�� ó��ίԱ�ᡢ��ּ��š��š��˹ɷݡ��ҩҵ��ǡ��ȷɳ�ҵ��ɭ̩��硢 ��̩ʵҵ��˴��ߡ��򻪷��Ρ��ص�ء��㽭��ѧ��ݴ�ѧ��ݽ��ѧԺ��Ϻ��ͨ�� ѧ��Ԫ��š��š��ͨ�ͳ��Ϲ��ܡ��ҩҵ��̵ؼ��š��չ��ï��š� �󻪼��š��ɭ��Ϻ��̲ݼ��š��ǵ��Ƽ��Ͽ��š��й����缯�š��ļ�� ɷݡ��й��Ϸ�ȼ��š��ҵ��š��ǹ��衢��ϲ��š��뼯�š��㱦�ɷݡ�� ơ�ơ��֤ȯ�� ڿη��ڶг��Ĭ��ǳ��ʵս��ʵ�á�ʵЧ�� ԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡ� �� .��.��.֯��ŵ˹��ҵ��ѯ��޹�˾ �� .�� .��.��.�ߣ��- - ��.��.��.�� С�� .�� .��.��.��: �� - - ��.��.��.�� ԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡԡ� ��뽫��±��д��͵��chinasypx@foxmail.com��Ա��ڵ�һʱ��ϵ! �� ִ �� ҵ�λ��_______�˱�.��μӡ��ҵ˰��˰��չ�ܼ��ʵ�� λ��ƣ�_____________________________________________ �� ϵ �ˣ�_____________ ��ϵ�绰��_______________ �ֻ��_______________ ͼ�Ĵ��棺_____________ ��䣺_____________________________________ �� ˣ�_____________ �� ˣ�_____________ �� ˣ�_____________ �� ˣ�_____________ �� ˣ�_____________ �� ˣ�_____________ �� ã�___________ Ԫ�� ʽ�� 𡡡� ֧ Ʊ�� ת �ʡ��ѡ��򡰡̡�� ע: 1.��ѱ��ִ��ú�ش��˾��Ϊȷ��,��ٴε绰ȷ��! 2.��γ̿ɸ��ҵ��Ҫ��֯��ѵ��

13 years, 9 months

1
0
0 0

[PATCH 0/4] Miscellaneous dma-buf patches

by Laurent Pinchart

Hi Sumit, Here are 4 dma-buf patches that fix small issues. Laurent Pinchart (4): dma-buf: Constify ops argument to dma_buf_export() dma-buf: Remove unneeded sanity checks dma-buf: Return error instead of using a goto statement when possible dma-buf: Move code out of mutex-protected section in dma_buf_attach() drivers/base/dma-buf.c | 26 +++++++++++--------------- include/linux/dma-buf.h | 8 ++++---- 2 files changed, 15 insertions(+), 19 deletions(-) -- Regards, Laurent Pinchart

13 years, 9 months

4
13
0 0

[PATCH 00/10] Integration of videobuf2 with dmabuf

by Tomasz Stanislawski

Hello everyone, This patchset is an incremental patch to patchset created by Sumit Semwal [1]. The patches are dedicated to help find a better solution for support of buffer sharing by V4L2 API. It is expected to start discussion on final installment for dma-buf in vb2-dma-contig allocator. Current version of the patches contain little documentation. It is going to be fixed after achieving consensus about design for buffer exporting. Moreover the API between vb2-core and the allocator should be revised. The amount of changes to vb2-dma-contig.c was significant making the difference patch very difficult to read. Therefore the patch was split into two parts. One removes old file, the next patch creates the version of the file. The patchset contains extension for DMA API and its implementation for ARM architecture. Therefore the patchset should be applied on the top of: http://git.infradead.org/users/kmpark/linux-2.6-samsung/shortlog/refs/heads… After applying patches from [2] and [1]. v1: List of changes since [1]. - support for DMA api extension dma_get_pages, the function is used to retrieve pages used to create DMA mapping. - small fixes/code cleanup to videobuf2 - added prepare and finish callbacks to vb2 allocators, it is used keep consistency between dma-cpu acess to the memory (by Marek Szyprowski) - support for exporting of DMABUF buffer in V4L2 and Videobuf2, originated from [3]. - support for dma-buf exporting in vb2-dma-contig allocator - support for DMABUF for s5p-tv and s5p-fimc (capture interface) drivers, originated from [3] - changed handling for userptr buffers (by Marek Szyprowski, Andrzej Pietrasiewicz) - let mmap method to use dma_mmap_writecombine call (by Marek Szyprowski) [1] http://thread.gmane.org/gmane.linux.drivers.video-input-infrastructure/4296… [2] https://lkml.org/lkml/2011/12/26/29 [3] http://thread.gmane.org/gmane.linux.drivers.video-input-infrastructure/3635… Marek Szyprowski (2): [media] media: vb2: remove plane argument from call_memop and cleanup mempriv usage media: vb2: add prepare/finish callbacks to allocators Tomasz Stanislawski (8): arm: dma: support for dma_get_pages v4l: vb2: fixes for DMABUF support v4l: add buffer exporting via dmabuf v4l: vb2: add buffer exporting via dmabuf v4l: vb2: remove dma-contig allocator v4l: vb2-dma-contig: code refactoring, support for DMABUF exporting v4l: fimc: integrate capture i-face with dmabuf v4l: s5p-tv: mixer: integrate with dmabuf arch/arm/include/asm/dma-mapping.h | 8 + arch/arm/mm/dma-mapping.c | 44 ++ drivers/media/video/s5p-fimc/fimc-capture.c | 11 +- drivers/media/video/s5p-tv/mixer_video.c | 11 +- drivers/media/video/v4l2-compat-ioctl32.c | 1 + drivers/media/video/v4l2-ioctl.c | 11 + drivers/media/video/videobuf2-core.c | 114 ++++- drivers/media/video/videobuf2-dma-contig.c | 754 +++++++++++++++++++++------ include/linux/dma-mapping.h | 2 + include/linux/videodev2.h | 1 + include/media/v4l2-ioctl.h | 1 + include/media/videobuf2-core.h | 10 +- 12 files changed, 789 insertions(+), 179 deletions(-) -- 1.7.5.4

13 years, 9 months

6
36
0 0

[PATCH v4 0/4] Add CMA heap for ION memory manager

by benjamin.gaignard＠stericsson.com

From: Benjamin Gaignard <benjamin.gaignard(a)linaro.org> The goal of those patches is to allow ION clients (drivers or userland applications) to use Contiguous Memory Allocator (CMA). To get more info about CMA: http://lists.linaro.org/pipermail/linaro-mm-sig/2012-February/001328.html patches version 4: - add ION_HEAP_TYPE_DMA heap type in ion_heap_type enum. - CMA heap is now a "native" ION heap. - add ion_heap_create_full function to keep backward compatibilty. - clean up included files in CMA heap - ux500-ion is using ion_heap_create_full instead of ion_heap_create patches version 3: - add a private field in ion_heap structure instead of expose ion_device structure to all heaps - ion_cma_heap is no more a platform driver - ion_cma_heap use ion_heap private field to store the device pointer and make the link with reserved CMA regions - provide ux500-ion driver and configuration file for snowball board to give an example of how use CMA heaps patches version 2: - fix comments done by Andy Green Benjamin Gaignard (4): fix ion_platform_data definition add private field in ion_heap structure add CMA heap add test/example driver for ux500 platform arch/arm/mach-ux500/board-mop500.c | 77 +++++++++++++++++++ drivers/gpu/ion/Kconfig | 6 ++ drivers/gpu/ion/Makefile | 4 +- drivers/gpu/ion/ion_cma_heap.c | 129 ++++++++++++++++++++++++++++++++ drivers/gpu/ion/ion_heap.c | 14 +++- drivers/gpu/ion/ion_priv.h | 11 +++ drivers/gpu/ion/ux500/Makefile | 1 + drivers/gpu/ion/ux500/ux500_ion.c | 142 ++++++++++++++++++++++++++++++++++++ include/linux/ion.h | 5 +- 9 files changed, 386 insertions(+), 3 deletions(-) create mode 100644 drivers/gpu/ion/ion_cma_heap.c create mode 100644 drivers/gpu/ion/ux500/Makefile create mode 100644 drivers/gpu/ion/ux500/ux500_ion.c

13 years, 9 months

1
4
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Re: [Linaro-mm-sig] [PATCH] RFC: dma-buf: userspace mmap support

by Alan Cox

> If the API was to also be used for synchronization it would have to > include an atomic "prepare multiple" ioctl which blocked until all > the buffers listed by the application were available. In the same Too slow already. You are now serializing stuff while what we want to do really is nobody_else_gets_buffers_next([list]) on available(buffer) dispatch_work(buffer) so that you can maximise parallelism without allowing deadlocks. If you've got a high memory bandwith and 8+ cores the 'stop everything' model isn't great. > This might be a good argument for keeping synchronization and cache > maintenance separate, though even ignoring synchronization I would > think being able to issue cache maintenance operations for multiple > buffers in a single ioctl might present some small efficiency gains. > However as Rob points out, CPU access is already in slow/legacy > territory. Dangerous assumption. I do think they should be separate. For one it makes the case of synchronization needed but hardware cache management much easier to split cleanly. Assuming CPU access is slow/legacy reflects a certain model of relatively slow CPU and accelerators where falling off the acceleration path is bad. On a higher end processor falling off the acceleration path isn't a performance matter so much as a power concern. > KDS we differentiated jobs which needed "exclusive access" to a > buffer and jobs which needed "shared access" to a buffer. Multiple > jobs could access a buffer at the same time if those jobs all Makes sense as it's a reader/writer lock and it reflects MESI/MOESI caching and cache policy in some hardware/software assists. > display controller will be reading the front buffer, but the GPU > might also need to read that front buffer. So perhaps adding > "read-only" & "read-write" access flags to prepare could also be > interpreted as shared & exclusive accesses, if we went down this > route for synchronization that is. :-) mmap includes read/write info so probably using that works out. It also means that you have the stuff mapped in a way that will bus error or segfault anyone who goofs rather than give them the usual 'deep weirdness' behaviour you get with mishandling of caching bits. Alan

13 years, 9 months

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