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path: root/drivers/misc/habanalabs/debugfs.c
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2020-07-24habanalabs: create common folderOded Gabbay1-1411/+0
For internal needs of our CI we need to move all the common code into a common folder instead of putting them in the root folder of the driver. Same applies to the common header files under include/ Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Reviewed-by: Omer Shpigelman <oshpigelman@habana.ai>
2020-06-24habanalabs: rename mmu_write() to mmu_asid_va_write()Oded Gabbay1-2/+2
The function name conflicts with a static inline function in arch/m68k/include/asm/mcfmmu.h Reported-by: kernel test robot <lkp@intel.com> Reviewed-by: Tomer Tayar <ttayar@habana.ai> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-05-19habanalabs: support clock gating enable/disableOded Gabbay1-0/+61
In Gaudi there is a feature of clock gating certain engines. Therefore, add this property to the device structure. In addition, due to a limitation of this feature, the driver needs to dynamically enable or disable this feature during run-time. Therefore, add ASIC interface functions to enable/disable this function from the common code. Moreover, this feature must be turned off when the user wishes to debug the ASIC by reading/writing registers and/or memory through the driver's debugfs. Therefore, add an option to enable/disable clock gating via the debugfs interface. Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-05-17habanalabs: remove stop-on-error flag from DMAOmer Shpigelman1-0/+55
Stop-on-error mode in DMA is useful as it stops the transaction immediately upon error e.g. page fault. But it may cause the next command submission to fail as is leaves the DMA in unstable state. Therefore we remove the stop-on-error configuration from the DMA. Stop-on-err is still available for debug. Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-03-24habanalabs: add debugfs write64/read64Moti Haimovski1-0/+71
Allow debug user to write/read 64-bit data through debugfs. This will expedite the dump process of the (large) internal memories of the device done during debug. Signed-off-by: Moti Haimovski <mhaimovski@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2020-03-24habanalabs: split the host MMU propertiesOmer Shpigelman1-8/+13
Host memory may be allocated with huge pages. A different virtual range may be used for mapping in this case. Add Huge PCI MMU (HPMMU) properties to support it. This patch is a prerequisite for future ASICs support and has no effect on Goya ASIC as currently a single virtual host range is used for all page sizes. Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2019-11-21habanalabs: add more protection of device during resetOded Gabbay1-0/+16
Prevent accesses to the device (register read/write) from debugfs entries during reset as that can cause the device to get stuck. Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Reviewed-by: Tomer Tayar <ttayar@habana.ai>
2019-11-21habanalabs: split MMU properties to PCI/DRAMOmer Shpigelman1-29/+61
Split the properties used for MMU mappings to DRAM and PCI (host) types. This is a prerequisite for future ASICs support. Note that in Goya ASIC, the PMMU and DMMU are the same (except of page sizes) as only one MMU mechanism is used for both of the mapping types. Hence this patch should not have any effect on current behavior. Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2019-11-21habanalabs: re-factor MMU masks and documentationOmer Shpigelman1-3/+3
Some cosmetics around the MMU code to make it more self-explanatory. Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2019-09-05habanalabs: replace __cpu_to_le32/64 with cpu_to_le32/64Oded Gabbay1-6/+6
In some files the code use __cpu_to_le32/64 while in other it use cpu_to_le32/64. Replace all __cpu_to_le32/64 instances with cpu_to_le32/64 for consistency. Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2019-09-05habanalabs: rename user_ctx as compute_ctxOded Gabbay1-2/+2
This patch renames the "user_ctx" field in the device structure to "compute_ctx". This better reflects the meaning of this context. In addition, we also check in the ctx_fini() that the debug mode should be disabled only if the context being destroyed is the compute context. This has no effect right now as we only have a single process and a single context, but this makes the code more ready for multiple process support. Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-07-01habanalabs: Add busy engines bitmask to HW idle IOCTLTomer Tayar1-1/+1
The information which is currently provided as a response to the "HL_INFO_HW_IDLE" IOCTL is merely a general boolean value. This patch extends it and provides also a bitmask that indicates which of the device engines are busy. Signed-off-by: Tomer Tayar <ttayar@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2019-07-01habanalabs: Add debugfs node for engines statusTomer Tayar1-0/+12
Command submissions sent to the device are composed of command buffers which are targeted to different device engines, like DMA and compute entities. When a command submission gets stuck, knowing in which engine the stuck is, is crucial for debugging. This patch adds a debugfs node that exports this information, by displaying the engines' various registers that assemble their idle/busy status. The information retrieval is based on the is_device_idle ASIC function. The printout in this function, of the first detected busy engine, is removed because it becomes redundant in the presence of the more elaborated info of the new debugfs node. Signed-off-by: Tomer Tayar <ttayar@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2019-06-16habanalabs: Allow accessing host mapped addresses via debugfsTomer Tayar1-12/+23
Allows using the addr/data32 debugfs nodes to access a device VA of a host mapped memory when the IOMMU is disabled. Due to the possible large amount of a user host mapped memory, the driver doesn't maintain a database with the host addresses per device VA. When the IOMMU is disabled, this missing info is being overcome by simply using phys_to_virt(). However, this is not useful when the IOMMU is enabled, and thus the enforced limitation. Signed-off-by: Tomer Tayar <ttayar@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2019-05-29habanalabs: add MMU mappings for Goya CPUOded Gabbay1-1/+6
This patch adds the necessary MMU mappings for the Goya CPU to access the device DRAM and the host memory. The first 256MB of the device DRAM is being mapped. That's where the F/W is running. The 2MB area located on the host memory for the purpose of communication between the driver and the device CPU is also being mapped. Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2019-06-03habanalabs: Fix virtual address access via debugfs for 2MB pagesTomer Tayar1-1/+4
The debugfs interface for accessing DRAM virtual addresses currently uses the 12 LSBs of a virtual address as an offset. However, it should use the 20 LSBs in case the device MMU page size is 2MB instead of 4KB. This patch fixes the offset calculation to be based on the page size. Signed-off-by: Tomer Tayar <ttayar@habana.ai> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2019-05-24habanalabs: fix debugfs codeJann Horn1-42/+18
This fixes multiple things in the habanalabs debugfs code, in particular: - mmu_write() was unnecessarily verbose, copying around between multiple buffers - mmu_write() could write a user-specified, unbounded amount of userspace memory into a kernel buffer (out-of-bounds write) - multiple debugfs read handlers ignored the user-supplied count, potentially corrupting out-of-bounds userspace data - hl_device_read() was unnecessarily verbose - hl_device_write() could read uninitialized stack memory - multiple debugfs read handlers copied terminating null characters to userspace Signed-off-by: Jann Horn <jannh@google.com> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Cc: stable@vger.kernel.org
2019-03-12habanalabs: Allow accessing DRAM virtual addresses via debugfsTomer Tayar1-5/+91
The addr/data32 debugfs nodes currently permit the access to only physical addresses of a device. This patch extends it and allows accessing also device's DRAM virtual addresses. Signed-off-by: Tomer Tayar <ttayar@habana.ai> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2019-03-05habanalabs: fix MMU number of pages calculationOmer Shpigelman1-3/+4
The requested allocation size is 64bit, hence the number of requested pages and the total requested size should 64bit as well. This patch fixes all places where these are treated as 32bit. Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
2019-02-28habanalabs: fix little-endian<->cpu conversion warningsOded Gabbay1-6/+9
Add __cpu_to_le16/32/64 and __le16/32/64_to_cpu where needed according to sparse. Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-28habanalabs: disable CPU access on timeoutsOded Gabbay1-2/+4
This patch provides a workaround for a bug in the F/W where the response time for a request from KMD may take more then 100ms. This could cause the queue between KMD and the F/W to get out of sync. The WA is to: 1. Increase the timeout of ALL requests to 1s. 2. In case a request isn't answered in time, mark the state as "cpu_disabled" and prevent sending further requests from KMD to the F/W. This will eventually lead to a heartbeat failure and hard reset of the device. Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-26habanalabs: return error when failing to read/write i2cOded Gabbay1-2/+2
The driver can't read/write from i2c if the device is in reset or disabled. Therefore, return -EBUSY in those cases instead of 0. This change also fixes a smatch warning about uninitialized variable. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-18habanalabs: add debugfs supportOded Gabbay1-0/+1072
This patch adds debugfs support to the driver. It allows the user-space to display information that is contained in the internal structures of the driver, such as: - active command submissions - active user virtual memory mappings - number of allocated command buffers It also enables the user to perform reads and writes through Goya's PCI bars. Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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