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path: root/drivers/misc/mei
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2014-09-29mei: fix style warning: Missing a blank line after declarationsTomas Winkler9-6/+51
fix new style warning: Missing a blank line after declarations Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-29mei: pg: fix cat and paste error in commentsTomas Winkler1-2/+2
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-29mei: debugfs: add single buffer indicatorTomas Winkler1-3/+4
Add indication whether the client operates in single buffer mode Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-29mei: debugfs: adjust print bufferAlexander Usyskin1-7/+15
In case of many me clients (15 and more) 1K buffer is not enough for full information print. Calculate buffer size according to real clients number. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-29mei: add hbm and pg state in devstate debugfs printAlexander Usyskin5-1/+38
Add hbm state, pg enablement and state to devstate file in debugfs (<debugfs>/mei/devstate) Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-26mei: fix commentsGeert Uytterhoeven2-4/+4
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: "Winkler, Tomas" <tomas.winkler@intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-09-24mei: bus: fix possible boundaries violationAlexander Usyskin1-1/+1
function 'strncpy' will fill whole buffer 'id.name' of fixed size (32) with string value and will not leave place for NULL-terminator. Possible buffer boundaries violation in following string operations. Replace strncpy with strlcpy. Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: use connect_data on the stackTomas Winkler1-16/+5
There is no need for dynamic allocation for connect_data. We can use variable on the stack and make code less error prone and simple Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: enable adding more IOCTL handlersTomas Winkler1-25/+28
Handle ioctls in a switch statement so we can add more commands easily Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: extract supported features from the hbm versionTomas Winkler3-6/+29
extract supported hbm features and commands from the hbm version Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: simplify handling of hbm client eventsTomas Winkler1-31/+43
Add mei_hbm_cl_find_by_cmd handler to retrieve the destination client Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: wait for hbm start non-interruptibleAlexander Usyskin4-14/+22
We cannot handle user interrupt in context of hbm start so we only wait for time out which is reasonably short. 1. Add kdoc 2. Rename state to better reflect its function 3. Simplify wait condition and rename wait_recvd_msg to wait_hbm_start Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: revamp connect and disconnect response handlingTomas Winkler2-57/+65
Both responses have same flow only the client status update is different. We introduce handler mei_hbm_cl_res() that handles both responses Also we use per client wait queue (cl->wait) rather then global dev->wait_recvd_msg Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: use disconnect name consistentlyTomas Winkler3-9/+8
Rename mei_cl_irq_close to mei_cl_irq_disconnect and MEI_FOP_CLOSE to MEI_FOP_DISCONNECT Remove unused MEI_FOP_OPEN Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: add hbm commands return status valuesTomas Winkler2-8/+53
HBM uses global list of status values from which the values of particular commands are derived Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: add mei_me_cl_by_uuid_id functionTomas Winkler8-9/+26
When handling dynamic clients there might be a race scenario in which two me clients with the same me address would be linked in the me clients list, therefore we need to search by both uuid and me address. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: add me client remove functionsTomas Winkler3-7/+38
To support dynamic addition/remove we add wrappers for removal of me clients Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: use list for me clients book keepingTomas Winkler5-103/+71
To support dynamic addition/remove of clients it is more convenient to use list instead of static array Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: me_client lookup function to return me_client objectTomas Winkler8-89/+74
For support of dynamic addition and removal of me clients it is more convenient to use a list instead of static array as is use now. As the first step of the transition to the new data structure we change the lookup function so it returns me client address instead of an index. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: use wrapper for simple hbm client messageTomas Winkler1-26/+25
Reduce few code lines by using wrappers for sending simple hbm client messages Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: use consistently me_addr in the hbm structuresTomas Winkler2-6/+5
Use consistently me_addr name in hbm protocol structures to represent in firmware client address Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: amthif: don't check amthif client identity on amthif queuesAlexander Usyskin1-22/+15
Amthif has its own queues therefore it is redundant to check the client type when processing the queues Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: amthif: use service function to flush amthif queueAlexander Usyskin3-12/+5
Replace open coded loop with an existing service function: mei_io_list_flush Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-24mei: me: wait for hw ready non-interruptibleAlexander Usyskin1-10/+5
We cannot handle user interrupt in context of hw initialization so we only wait for time out which is reasonably short Also we don't need to check error from wait, only flag value. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-08-26mei: nfc: fix memory leak in error pathAlexander Usyskin1-6/+5
NFC will leak buffer if send failed. Use single exit point that does the freeing Cc: stable@vger.kernel.org #3.10+ Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-08-26mei: reset client state on queued connect requestAlexander Usyskin1-0/+1
If connect request is queued (e.g. device in pg) set client state to initializing, thus avoid preliminary exit in wait if current state is disconnected. This is regression from: commit e4d8270e604c3202131bac607969605ac397b893 Author: Alexander Usyskin <alexander.usyskin@intel.com> mei: set connecting state just upon connection request is sent to the fw CC: stable@vger.kernel.org # 3.15+ Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-23mei: drop unused hw dependent fw status functionsAlexander Usyskin3-89/+0
We introduced unified FW status function in patch mei: add per device configuration (lkml.org/lkml/2014/5/12/607) This change made hw_ops functions unused and obsolete therefore we remove these functions from source code. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-18mei: fix return value on disconnect timeoutAlexander Usyskin1-10/+5
wait_event_timeout can return 0 or the remaining jiffies so return -ETIME if disconnected state not reached. Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-18mei: don't schedule suspend in pm idleAlexander Usyskin2-2/+2
Calling pm_schedule_suspend from the runtime pm idle callback may reschedule existing timer, thus in case of frequent runtime rpm idle call the suspend maybe starved. Instead we call pm_runtime_autosuspend which is checking if the timer is already charged. An example is monitoring device pci config space. Pci config sysfs handlers calls pci_config_pm_runtime_put/get helpers which in turns calls to device idle callback Cc: stable@vger.kernel.org # 3.15+ Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-18mei: start disconnect request timer consistentlyAlexander Usyskin1-0/+1
Link must be reset in case the fw doesn't respond to client disconnect request. We did charge the timer only in irq path from mei_cl_irq_close and not in mei_cl_disconnect Cc: stable@vger.kernel.org # 3.10+ Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-18mei: reset client connection state on timeoutAlexander Usyskin1-0/+1
On connection timeout we leave the connecting client in connecting state. Since a new connection is stalled till previous connection is completed in this case no new connection is possible till the user space does release the file handle. Therefore on timeout we move the client to disconnected state. Cc: stable@vger.kernel.org # 3.15+ Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-10mei: add WPT second mei interfaceAlexander Usyskin2-0/+2
Add WPT second mei interface. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-10mei: move from misc to char deviceAlexander Usyskin4-31/+131
We need to support more then one mei interface hence the simple misc devices is not longer an option In order not break the user space a device with pci function 0 need to be linked to /dev/mei Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-28mei: me: move probe quirk to cfg structureTomas Winkler4-34/+54
Move quirk FW type detector to cfg structure Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-28mei: add per device configurationAlexander Usyskin8-52/+144
Add mei_cfg structure that holds per device configuration data and hooks, as the first step we add firmware status register offsets Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-28mei: me: read H_CSR after asserting resetTomas Winkler1-0/+12
According the spec the host should read H_CSR again after asserting reset H_RST to ensure that reset was read by the firmware Cc: stable@vger.kernel.org Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-28mei: me: drop harmful wait optimizationTomas Winkler1-3/+1
It my take time till ME_RDY will be cleared after the reset, so we cannot check the bit before we got the interrupt Cc: stable@vger.kernel.org Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-28mei: me: fix hw ready reset flowTomas Winkler1-3/+6
We cleared H_RST for H_CSR on spurious interrupt generated when ME_RDY while cleared and not while ME_RDY is set. The spurious interrupt is not delivered on all platforms in this case the driver may fail to initialize. Cc: stable@vger.kernel.org Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-28mei: fix memory leak of mei_clients arrayTomas Winkler3-18/+31
we never freed the mei_clients array on driver shutdown only on reset add mei_hbm_reset function that wraps the hbm cleanup Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-04mei: set connecting state just upon connection request is sent to the fwAlexander Usyskin5-7/+1
Adding power gating introduced new waiting state for client also during connection attempt, a connection request can be queued for later either due device is power gated or due to other on going connection. We setting client connection state before start of full connect procedure so in both cased the client state will be MEI_FILE_CONNECTING which create interlock between the two connection attempts, both detecting that another connection is in progress. The interlock is resolved by moving client to connecting state only upon connection request transmission, so the first cb in queue can be processed. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-04mei: make return values consistent across the driverAlexander Usyskin2-4/+3
Follow-up for bits missed in commit 7ca96aa278f8b9983184e318b06a0ed9ad0297b8 mei: make return values consistent across the driver Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-04mei: extract fw status registersAlexander Usyskin5-5/+127
Fetch FW status registers, as they are important in in understanding of FW reset reasons Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-04mei: me: bump hbm version to 1.1 to support power gatingTomas Winkler1-1/+1
Communicate hbm version 1.1 to firmware to tell that we now support power gating isolation protocol Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-04mei: txe: use runtime PG pm domain for non wakeable devicesAlexander Usyskin1-0/+49
For non wakeable devices we can't use pci runtime framework as we are not able to wakeup from D3 states. Instead we create new pg runtime domain that only drives TXE power gating protocol to reduce the power consumption. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-04mei: me: use runtime PG pm domain for non wakeable devicesTomas Winkler2-0/+53
For non wakeable devices we can't use pci runtime framework as we are not able to wakeup from D3 states. Instead we create new pg runtime domain that only drives ME power gating protocol to reduce the power consumption. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-04mei: use runtime pm in write and read flowTomas Winkler1-13/+71
Take rpm token on operation start to initiate rpm resume if needed. Mark last busy time, release token and advice rpm framework to try to autosuspend on operation end. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-04mei: txe: add runtime pm frameworkAlexander Usyskin2-4/+99
Add runtime pm framework for TXE devices. The runtime pm handlers are used to run txe power gating isolation protocol. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-04mei: me: add runtime pm frameworkTomas Winkler3-2/+100
Add runtime pm framework for ME devices. The runtime pm handlers are used to run me power gating isolation protocol Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-04mei: add function to check write queuesTomas Winkler2-0/+23
The driver needs to check whether the write queue idle before entering power gating Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-04mei: me: add pg exit and entry flow commandsTomas Winkler4-4/+95
For power gating entry we write hbm pg entry request command and then we set pg register For power gating exit we clear pg register and wait for exit request hbm command. Exit power gating request might also be initiated by the firmware w/o explicit driver request The power gating state is tracked by pg_state member of me_hw Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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