- 26 Sep, 2013 40 commits
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Wei Yongjun authored
irq allocated with devm_request_irq should not be freed using free_irq, because doing so causes a dangling pointer, and a subsequent double free. Signed-off-by:
Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Caz Yokoyama authored
This patch introduces a sample user space daemon which implements the virtio device backends on the host. The daemon creates/removes/configures virtio device backends by communicating with the Intel MIC Host Driver. The virtio devices currently supported are virtio net, virtio console and virtio block. Virtio net supports TSO/GSO. The daemon also monitors card shutdown status and takes appropriate actions like killing the virtio backends and resetting the card upon card shutdown and crashes. Co-author: Ashutosh Dixit <ashutosh.dixit@intel.com> Co-author: Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by:
Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by:
Caz Yokoyama <Caz.Yokoyama@intel.com> Signed-off-by:
Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by:
Nikhil Rao <nikhil.rao@intel.com> Signed-off-by:
Harshavardhan R Kharche <harshavardhan.r.kharche@intel.com> Signed-off-by:
Sudeep Dutt <sudeep.dutt@intel.com> Acked-by:
Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by:
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Ashutosh Dixit authored
This patch introduces the card "Virtio over PCIe" interface for Intel MIC. It allows virtio drivers on the card to communicate with their user space backends on the host via a device page. Ring 3 apps on the host can add, remove and configure virtio devices. A thin MIC specific virtio_config_ops is implemented which is borrowed heavily from previous similar implementations in lguest and s390 @ drivers/lguest/lguest_device.c drivers/s390/kvm/kvm_virtio.c Co-author: Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by:
Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by:
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Ashutosh Dixit authored
This patch introduces the host "Virtio over PCIe" interface for Intel MIC. It allows creating user space backends on the host and instantiating virtio devices for them on the Intel MIC card. It uses the existing VRINGH infrastructure in the kernel to access virtio rings from the host. A character device per MIC is exposed with IOCTL, mmap and poll callbacks. This allows the user space backend to: (a) add/remove a virtio device via a device page. (b) map (R/O) virtio rings and device page to user space. (c) poll for availability of data. (d) copy a descriptor or entire descriptor chain to/from the card. (e) modify virtio configuration. (f) handle virtio device reset. The buffers are copied over using CPU copies for this initial patch and host initiated MIC DMA support is planned for future patches. The avail and desc virtio rings are in host memory and the used ring is in card memory to maximize writes across PCIe for performance. Co-author: Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by:
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Sudeep Dutt authored
This patch does the following: a) Initializes the Intel MIC X100 platform device and driver. b) Sets up support to handle shutdown requests from the host. c) Maps the device page after obtaining the device page address from the scratchpad registers updated by the host. d) Informs the host upon a card crash by registering a panic notifier. e) Informs the host upon a poweroff/halt event. Co-author: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by:
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Sudeep Dutt authored
This patch enables the following features: a) Boots and shuts down the card via sysfs entries. b) Allocates and maps a device page for communication with the card driver and updates the device page address via scratchpad registers. c) Provides sysfs entries for shutdown status, kernel command line, ramdisk and log buffer information. Co-author: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by:
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Dasaratharaman Chandramouli authored
This patch enables the following features: a) MSIx, MSI and legacy interrupt support. b) System Memory Page Table(SMPT) support. SMPT enables system memory access from the card. On X100 devices the host can program 32 SMPT registers each capable of accessing 16GB of system memory address space from X100 devices. The registers can thereby be used to access a cumulative 512GB of system memory address space from X100 devices at any point in time. Co-author: Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by:
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Sudeep Dutt authored
This patch enables the following: a) Initializes the Intel MIC X100 PCIe devices. b) Provides sysfs entries for family and stepping information. Co-author: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by:
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Wei Yongjun authored
free_irq() expects the same device identity that was passed to corresponding request_irq(), otherwise the IRQ is not freed. Signed-off-by:
Dmitry Torokhov <dtor@vmware.com> Signed-off-by:
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Oliver Schinagl authored
Allwinner has electric fuses (efuse) on their line of chips. This driver reads those fuses, seeds the kernel entropy and exports them as a sysfs node. These fuses are most likely to be programmed at the factory, encoding things like Chip ID, some sort of serial number, etc. and appear to be reasonably unique. While in theory, these should be writeable by the user, it will probably be inconvenient to do so. Allwinner recommends that a certain input pin, labeled 'efuse_vddq', be connected to GND. To write these fuses however, a 2.5 V programming voltage needs to be applied to this pin. Even so, they can still be used to generate a board-unique mac from, board unique RSA key and seed the kernel RNG. On sun7i additional storage is available, this is initially used for an UEFI BOOT key, Secure JTAG key, HDMI-HDCP key and vendor specific keys. Currently supported are the following known chips: Allwinner sun4i (A10) Allwinner sun5i (A10s, A13) Allwinner sun7i (A20) Signed-off-by:
Oliver Schinagl <oliver@schinagl.nl> Acked-by:
Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
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Olaf Hering authored
send_buffer is used only once during registration. To reduce runtime memory usage reuse the recv_buffer for registration. Also use NLMSG_LENGTH instead of NLMSG_HDRLEN to take alignment into account. Signed-off-by:
Olaf Hering <olaf@aepfle.de> Signed-off-by:
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Olaf Hering authored
kvp_daemon does some operations which take an unpredicable amount of time. In addition the kernel driver gives the kvp_daemon a 5 second timeout to respond to message from the host. If an operation such as getaddrinfo takes a long time and the timeout triggers then netlink errors occour. As a result of such errors the daemon just terminates and the service becomes unavailable. Idendifying and fixing these shortcomings in the kernel-userland communication protocol will be done in separate patches. This change fixes just one obvious timeout bug. Update kvp_get_domain_name to not return a value, better diagnostic for the consumer of the hostname string, remove trailing newline in error case, use snprintf to not overrun output buffer, get hostname only once and return the cached result. Signed-off-by:
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Chanwoo Choi authored
This fixes up braces coding style issue by using checkpatch script. Cc: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Cc: Mark Brown <broonie@kernel.org> Signed-off-by:
Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by:
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Chanwoo Choi authored
This patch remove unnecessary extern declaration (extcon_set_state). checkpatch found this coding style issue. Signed-off-by:
Myungjoo Ham <myungjoo.ham@samsung.com> Signed-off-by:
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Chanwoo Choi authored
This patch fix 80 column coding sytle issues by using checkpatch script. Cc: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Cc: Mark Brown <broonie@kernel.org> Signed-off-by:
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Jingoo Han authored
The driver core clears the driver data to NULL after device_release or on probe failure. Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by:
Jingoo Han <jg1.han@samsung.com> Signed-off-by:
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Jingoo Han authored
The driver core clears the driver data to NULL after device_release or on probe failure. Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by:
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Jingoo Han authored
The driver core clears the driver data to NULL after device_release or on probe failure. Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by:
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Jingoo Han authored
The driver core clears the driver data to NULL after device_release or on probe failure. Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by:
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Daniel Mack authored
Only matching is done via DT, no other details can be passed. Signed-off-by:
Daniel Mack <zonque@gmail.com> Signed-off-by:
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Daniel Mack authored
This way, the module can be autoloaded by the SPI core. Signed-off-by:
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Daniel Mack authored
The driver's name can be provided directly, so drop the #define. Signed-off-by:
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Daniel Mack authored
Providing a module version doesn't add any value, so drop it. Signed-off-by:
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Greg Kroah-Hartman authored
This moves the ringbuffer bus attributes to the dev_groups structure, deletes the now unneeded struct hv_device_info, and removes some now unused functions, and variables as everything is now moved to the dev_groups structure, dev_attrs is no longer needed. Tested-by:
"K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by:
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Greg Kroah-Hartman authored
It's no longer needed, and the struct hv_ring_buffer_debug_info structure shouldn't be "global" so move it to the local .h file instead. Tested-by:
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Greg Kroah-Hartman authored
It's only used once, only contains 2 function calls, so just make those calls directly, deleting the function, and the now unneeded structure entirely. Tested-by:
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Greg Kroah-Hartman authored
This moves the "client_monitor_conn_id" and "server_monitor_conn_id" bus attributes to the dev_groups structure, removing the need for it to be in a temporary structure. Tested-by:
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Greg Kroah-Hartman authored
This moves the "client_monitor_latency" and "server_monitor_latency" bus attributes to the dev_groups structure, removing the need for it to be in a temporary structure. Tested-by:
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Greg Kroah-Hartman authored
This moves the "client_monitor_pending" and "server_monitor_pending" bus attributes to the dev_groups structure, removing the need for it to be in a temporary structure. Tested-by:
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Greg Kroah-Hartman authored
monitor_pages was a void pointer, containing an unknown number of arrays that we just "knew" were a child and parent array of a specific size. Instead of that implicit knowledge, let's make them a real pointer, allowing us to have type safety, and a semblance of sane addressing schemes. Tested-by:
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Greg Kroah-Hartman authored
This moves the "device_id" bus attribute to the dev_groups structure, removing the need for it to be in a temporary structure. Tested-by:
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Greg Kroah-Hartman authored
This moves the "class_id" bus attribute to the dev_groups structure, removing the need for it to be in a temporary structure. Tested-by:
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Greg Kroah-Hartman authored
This moves the "state" bus attribute to the dev_groups structure. Tested-by:
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Greg Kroah-Hartman authored
This moves the "state" bus attribute to the dev_groups structure, removing the need for it to be in a temporary structure. Tested-by:
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Greg Kroah-Hartman authored
This moves the "state" bus attribute to the dev_groups structure, removing the need for it to be in a temporary structure. Tested-by:
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Greg Kroah-Hartman authored
This patch is the first in a series that moves the hv bus code to use the dev_groups field instead of dev_attrs, as dev_attrs is going away in future kernel releases. It moves the id sysfs file to the dev_groups structure, and creates the needed show/store functions, instead of relying on one "universal" function for this. By doing this, it removes the need for this to be in a temporary structure. Tested-by:
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Libo Chen authored
Use module_pci_driver instead of init/exit, make code clean. Signed-off-by:
Libo Chen <libo.chen@huawei.com> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Eric Miao <eric.y.miao@gmail.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Libo Chen authored
Use module_pci_driver instead of init/exit, make code clean. Signed-off-by:
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Peter Senna Tschudin authored
The variable execute_shutdown is only assigned the values true and false. Change its type to bool. The simplified semantic patch that find this problem is as follows (http://coccinelle.lip6.fr/): @exists@ type T; identifier b; @@ - T + bool b = ...; ... when any b = \(true\|false\) Signed-off-by:
Peter Senna Tschudin <peter.senna@gmail.com> Signed-off-by:
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Elad Wexler authored
This change improves code readability & is less error-prone. For example: case adding more error paths one should remember to call 'mutex_unlock' Signed-off-by:
Elad Wexler <elad.wexler@gmail.com> Signed-off-by:
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