nvidia-tegra-modules.git/drivers/nvlink/nvlink-core.c, branch rtss22-ae NVIDIA's kernel modules to support tegra chips (used in Jetson boards) nvlink: Disable 1/8th mode for all t19x topologies 2018-08-30T05:39:44+00:00 Petlozu Pravareshwar petlozup@nvidia.com 2018-08-23T08:27:29+00:00 bb273a3ce0cfdbec3ff447040a2982eff468eafa Disable single-lane(1/8th) mode for all the t19x nvlink topologies. Also make sure we enable single-lane mode on nvlink only when both of the devices connected on either side of the link supports single lane mode. Bug 2341788 Change-Id: I95eae827cc6a3b748dd91637cdef27509a840c87 Signed-off-by: Petlozu Pravareshwar <petlozup@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1805191 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
Disable single-lane(1/8th) mode for all the t19x nvlink topologies.
Also make sure we enable single-lane mode on nvlink only when
both of the devices connected on either side of the link supports
single lane mode.

Bug 2341788

Change-Id: I95eae827cc6a3b748dd91637cdef27509a840c87
Signed-off-by: Petlozu Pravareshwar <petlozup@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1805191
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nvlink: Don't set sublink mode to TX/RX OFF 2018-06-20T06:32:51+00:00 Petlozu Pravareshwar petlozup@nvidia.com 2018-06-11T11:54:05+00:00 9b21cf12ff0099ec7e485a9ad8638794845d8e49 The LANEDISABLE minion command changes the sublinks to OFF. So an explicit setting of the sublinks to TX_OFF and RX_OFF is not needed in nvlink shutdown sequence and this change removes such explicit setting of sublinks to OFF. Bug 200411818 Bug 2113729 Change-Id: Ide613f5ff0a9c0c5243917e915d9cdfbe7fe95dc Signed-off-by: Petlozu Pravareshwar <petlozup@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1746164 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
The LANEDISABLE minion command changes the sublinks to OFF.
So an explicit setting of the sublinks to TX_OFF and RX_OFF
is not needed in nvlink shutdown sequence and this change
removes such explicit setting of sublinks to OFF.

Bug 200411818
Bug 2113729

Change-Id: Ide613f5ff0a9c0c5243917e915d9cdfbe7fe95dc
Signed-off-by: Petlozu Pravareshwar <petlozup@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1746164
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nvlink: core: convert error print into debug print 2018-06-20T01:23:14+00:00 Adeel Raza araza@nvidia.com 2018-06-19T00:45:57+00:00 23d0f4aa175b66b3a372845364793c408b823419 If an nvlink device's registration succeeds, the core driver prints a message to log this event. This is a debug print which is useful when debugging the NVLINK driver stack. By mistake, this print was previously being printed using nvlink_err() which meant that it was showing up during kernel boot. This was causing a kernel_warning_test failure in ap_systemsw. Fix this issue by using nvlink_dbg() instead of nvlink_err() to print this debug message. Bug 2133882 Bug 2086684 Jira NVLINK-107 Change-Id: I727a96d5ac55dd2b2557add8bbb8fb0a368b8f36 Signed-off-by: Adeel Raza <araza@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1753857 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
If an nvlink device's registration succeeds, the core driver prints a
message to log this event. This is a debug print which is useful when
debugging the NVLINK driver stack. By mistake, this print was previously
being printed using nvlink_err() which meant that it was showing up
during kernel boot. This was causing a kernel_warning_test failure in
ap_systemsw. Fix this issue by using nvlink_dbg() instead of
nvlink_err() to print this debug message.

Bug 2133882
Bug 2086684
Jira NVLINK-107

Change-Id: I727a96d5ac55dd2b2557add8bbb8fb0a368b8f36
Signed-off-by: Adeel Raza <araza@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1753857
Reviewed-by: Automatic_Commit_Validation_User
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nvlink: add support for kernel tests 2018-06-20T01:23:10+00:00 Adeel Raza araza@nvidia.com 2018-04-27T21:45:08+00:00 c484fb35bf3edee3b12dc41dbbe49fff0e24c2c5 Add support for NVLINK kernel test modules: - Create an NVLINK tests debugfs directory which will be used as the parent directory for all test related debugfs nodes - Export NVLINK logging APIs - Rename the NVLINK_DRV_NAME macros to NVLINK_MODULE_NAME. This was done because now the NVLINK logging APIs are being used by non-driver modules (i.e. tests) as well. - Export an ARM64 cache flush API - this API is needed by the Tegra loopback test Bug 2133882 Jira NVLINK-107 Change-Id: I587b704ff44327ee4d9767156cb87cbe27408e08 Signed-off-by: Adeel Raza <araza@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1704230 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Krishna Reddy <vdumpa@nvidia.com> Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
Add support for NVLINK kernel test modules:
   - Create an NVLINK tests debugfs directory which will be used as the
     parent directory for all test related debugfs nodes
   - Export NVLINK logging APIs
        - Rename the NVLINK_DRV_NAME macros to NVLINK_MODULE_NAME. This
          was done because now the NVLINK logging APIs are being used by
          non-driver modules (i.e. tests) as well.
   - Export an ARM64 cache flush API - this API is needed by the Tegra
     loopback test

Bug 2133882
Jira NVLINK-107

Change-Id: I587b704ff44327ee4d9767156cb87cbe27408e08
Signed-off-by: Adeel Raza <araza@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1704230
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com>
GVS: Gerrit_Virtual_Submit
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nvlink: add shim driver shutdown IOCTLs 2018-06-07T18:12:53+00:00 Adeel Raza araza@nvidia.com 2018-05-11T21:05:58+00:00 8af4db8e8ef8f67bc4757c54425f24511721be63 For the shim driver mode, RM needs to perform a graceful shutdown of NVLINK during RM unload. Export the following T19x NVLINK endpoint IOCTLs for shim driver NVLINK shutdown: - INTERFACE_DISABLE IOCTL: Disables the NVLINK aperture - FINALIZE_SHUTDOWN IOCTL: Does shutdown related SW cleanup Bug 2113729 Jira NVLINK-173 Change-Id: I60e3f5fffd0b1e6cc87476b047ef1b761b5174d1 Signed-off-by: Adeel Raza <araza@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1714177 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
For the shim driver mode, RM needs to perform a graceful shutdown of
NVLINK during RM unload. Export the following T19x NVLINK endpoint
IOCTLs for shim driver NVLINK shutdown:
   - INTERFACE_DISABLE IOCTL: Disables the NVLINK aperture
   - FINALIZE_SHUTDOWN IOCTL: Does shutdown related SW cleanup

Bug 2113729
Jira NVLINK-173

Change-Id: I60e3f5fffd0b1e6cc87476b047ef1b761b5174d1
Signed-off-by: Adeel Raza <araza@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1714177
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com>
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nvlink: Initialize Tegra nvlink before dGPU 2018-06-04T12:11:25+00:00 Tejal Kudav tkudav@nvidia.com 2018-06-02T13:18:58+00:00 6220ecfc13bfe2c632f8ee23f84c2c343b8ffa6e INITRXTERM on remote endpoint should be executed before RXDET on Nvlink 2.2 capable endpoint as per nvlink bringup sequence. On nvlink 2.0, there was no such dependency between endpoints during initialization. So swapping the initialization order between slave and master device should not affect older topologies. Jira NVLINK-160 Change-Id: I1dfd76a9b3a0b42414cb8989ca85f61893f4cd6d Signed-off-by: Tejal Kudav <tkudav@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1737788 GVS: Gerrit_Virtual_Submit Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com> Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
INITRXTERM on remote endpoint should be executed before RXDET on Nvlink 2.2
capable endpoint as per nvlink bringup sequence. On nvlink 2.0, there was
no such dependency between endpoints during initialization. So swapping the
initialization order between slave and master device should not affect older
topologies.

Jira NVLINK-160

Change-Id: I1dfd76a9b3a0b42414cb8989ca85f61893f4cd6d
Signed-off-by: Tejal Kudav <tkudav@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1737788
GVS: Gerrit_Virtual_Submit
Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
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nvlink: Implement nvlink shutdown during SC0/SC7 2018-05-11T13:58:02+00:00 Suresh Mangipudi smangipudi@nvidia.com 2018-02-20T12:00:45+00:00 f62a90bb79f4dc2f5385d9913a0dea74cb83bf01 This change implements below nvlink shutdown steps: * Ensure nvlink is idle and no pending transactions * Turn off MSS Nvlink slave aperture * Turn off MSS Nvlink core clocks * Transition the link to SWCFG * Transition the link to OFF * Assert t19x nvlink resets and disable the clks Also this change adds "shutdown" debugfs node that can be used to shutdown t19x nvlink. Bug 200402583 Bug 200389569 Change-Id: I7312f3c49ed643a66325b9280b392394008276d4 Signed-off-by: Suresh Mangipudi <smangipudi@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1661191 Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com> Tested-by: Petlozu Pravareshwar <petlozup@nvidia.com> Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Tejal Kudav <tkudav@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
This change implements below nvlink shutdown steps:
* Ensure nvlink is idle and no pending transactions
* Turn off MSS Nvlink slave aperture
* Turn off MSS Nvlink core clocks
* Transition the link to SWCFG
* Transition the link to OFF
* Assert t19x nvlink resets and disable the clks

Also this change adds "shutdown" debugfs node that can
be used to shutdown t19x nvlink.

Bug 200402583
Bug 200389569

Change-Id: I7312f3c49ed643a66325b9280b392394008276d4
Signed-off-by: Suresh Mangipudi <smangipudi@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1661191
Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com>
Tested-by: Petlozu Pravareshwar <petlozup@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Tejal Kudav <tkudav@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
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nvlink: add RM shim driver support 2018-04-23T17:03:45+00:00 Adeel Raza araza@nvidia.com 2018-02-11T08:28:37+00:00 6834b184688ff78118ca60ffd23a100a1150e785 Add support in the Tegra NVLINK endpoint driver for interfacing with the RM shim driver. Interfacing with RM is necessary in order to enable GPU MODS NVLINK testing of Tegra+dGPU topologies. Jira NVLINK-147 Bug 2090322 Change-Id: I75e23df7293ce0c9157152a7035372d2e080ef41 Signed-off-by: Adeel Raza <araza@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1696116 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Tejal Kudav <tkudav@nvidia.com> Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com> Tested-by: Petlozu Pravareshwar <petlozup@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
Add support in the Tegra NVLINK endpoint driver for interfacing with the
RM shim driver. Interfacing with RM is necessary in order to enable GPU
MODS NVLINK testing of Tegra+dGPU topologies.

Jira NVLINK-147
Bug 2090322

Change-Id: I75e23df7293ce0c9157152a7035372d2e080ef41
Signed-off-by: Adeel Raza <araza@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1696116
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Tejal Kudav <tkudav@nvidia.com>
Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com>
Tested-by: Petlozu Pravareshwar <petlozup@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
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nvlink: Support 1/8th mode only on Tegra loopback 2018-02-16T11:05:29+00:00 Tejal Kudav tkudav@nvidia.com 2018-02-01T08:34:15+00:00 d8806d7c37067b1db9a70b3cc3a1630a49ce5f8e 1/8th mode(Single lane mode) is not a PoR on Automotive systems. The dGPU nvlink endpoint driver does have an 1/8th mode implemented. We need to update the core driver to make calls to enable/disable PM only when the topology is Tegra loopback i.e. one which does not involve dGPU as call to enable/disable PM on dGPU would fail. Change-Id: I854ea5a51b12dd276779381783bbc3c32c13e679 Signed-off-by: Tejal Kudav <tkudav@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1650228 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com> Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
1/8th mode(Single lane mode) is not a PoR on Automotive systems.
The dGPU nvlink endpoint driver does have an 1/8th mode implemented.
We need to update the core driver to make calls to enable/disable
PM only when the topology is Tegra loopback i.e. one which does not
involve dGPU as call to enable/disable PM on dGPU would fail.

Change-Id: I854ea5a51b12dd276779381783bbc3c32c13e679
Signed-off-by: Tejal Kudav <tkudav@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1650228
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
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nvlink: add debugfs node for log mask 2018-02-07T05:22:21+00:00 Adeel Raza araza@nvidia.com 2018-02-05T02:21:32+00:00 50a2d7ec23e08e30bc20428762a9216eef6d85c4 Add a debugfs node in the NVLINK core driver to control the NVLINK driver stack's log mask at run time. By default the NVLINK driver stack only prints error messages. If debug prints are needed, the log mask can be modified through the debugfs node. Change-Id: Icf9b350a46b4afdb93d0e9bc776e9b259e49cafb Signed-off-by: Adeel Raza <araza@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1651838 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
Add a debugfs node in the NVLINK core driver to control the NVLINK
driver stack's log mask at run time. By default the NVLINK driver stack
only prints error messages. If debug prints are needed, the log mask can
be modified through the debugfs node.

Change-Id: Icf9b350a46b4afdb93d0e9bc776e9b259e49cafb
Signed-off-by: Adeel Raza <araza@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1651838
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Petlozu Pravareshwar <petlozup@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>