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2025-05-20nvmet-fcloop: track ref counts for nportsDaniel Wagner
A nport object is always used in association with targerport, remoteport, tport and rport objects. Add explicit references for any of the associated object. This ensures that nport is not removed too early on shutdown sequences. Signed-off-by: Daniel Wagner <wagi@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvmet-auth: use SHASH_DESC_ON_STACKHannes Reinecke
Use SHASH_DESC_ON_STACK to avoid explicit allocation. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvme-auth: use SHASH_DESC_ON_STACKHannes Reinecke
Use SHASH_DESC_ON_STACK to avoid explicit allocation. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvmet: simplify the nvmet_req_init() interfaceWilfred Mallawa
Now that a submission queue holds a reference to its completion queue, there is no need to pass the cq argument to nvmet_req_init(), so remove it. Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvmet: support completion queue sharingWilfred Mallawa
The NVMe PCI transport specification allows for completion queues to be shared by different submission queues. This patch allows a submission queue to keep track of the completion queue it is using with reference counting. As such, it can be ensured that a completion queue is not deleted while a submission queue is actively using it. This patch enables completion queue sharing in the pci-epf target driver. For fabrics drivers, completion queue sharing is not enabled as it is not possible as per the fabrics specification. However, this patch modifies the fabrics drivers to correctly integrate the new API that supports completion queue sharing. Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvmet: fabrics: add CQ init and destroyWilfred Mallawa
With struct nvmet_cq now having a reference count, this patch amends the target fabrics call chain to initialize and destroy/put a completion queue. Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvmet: cq: prepare for completion queue sharingWilfred Mallawa
For the PCI transport, the NVMe specification allows submission queues to share completion queues, however, this is not supported in the current NVMe target implementation. This is a preparatory patch to allow for completion queue (CQ) sharing between different submission queues (SQ). To support queue sharing, reference counting completion queues is required. This patch adds the refcount_t field ref to struct nvmet_cq coupled with respective nvmet_cq_init(), nvmet_cq_get(), nvmet_cq_put(), nvmet_cq_is_deletable() and nvmet_cq_destroy() functions. A CQ reference count is initialized with nvmet_cq_init() when a CQ is created. Using nvmet_cq_get(), a reference to a CQ is taken when an SQ is created that uses the respective CQ. Similarly. when an SQ is destroyed, the reference count to the respective CQ from the SQ being destroyed is decremented with nvmet_cq_put(). The last reference to a CQ is dropped on a CQ deletion using nvmet_cq_put(), which invokes nvmet_cq_destroy() to fully cleanup after the CQ. The helper function nvmet_cq_in_use() is used to determine if any SQs are still using the CQ pending deletion. In which case, the CQ must not be deleted. This should protect scenarios where a bad host may attempt to delete a CQ without first having deleted SQ(s) using that CQ. Additionally, this patch adds an array of struct nvmet_cq to the nvmet_ctrl structure. This allows for the controller to keep track of CQs as they are created and destroyed, similar to the current tracking done for SQs. The memory for this array is freed when the controller is freed. A struct nvmet_ctrl reference is also added to the nvmet_cq structure to allow for CQs to be removed from the controller whilst keeping the new API similar to the existing API for SQs. Sample callchain with CQ refcounting for the PCI endpoint target (pci-epf): i. nvmet_execute_create_cq -> nvmet_pci_epf_create_cq -> nvmet_cq_create -> nvmet_cq_init [cq refcount=1] ii. nvmet_execute_create_sq -> nvmet_pci_epf_create_sq -> nvmet_sq_create -> nvmet_sq_init -> nvmet_cq_get [cq refcount=2] iii. nvmet_execute_delete_sq - > nvmet_pci_epf_delete_sq -> -> nvmet_sq_destroy -> nvmet_cq_put [cq refcount 1] iv. nvmet_execute_delete_cq -> nvmet_pci_epf_delete_cq -> nvmet_cq_put [cq refcount 0] Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvmet: add a helper function for cqid checkingWilfred Mallawa
This patch adds a new helper function nvmet_check_io_cqid(). It is to be used when parsing host commands for IO CQ creation/deletion and IO SQ creation to ensure that the specified IO completion queue identifier (CQID) is not 0 (Admin queue ID). This is a check that already occurs in the nvmet_execute_x() functions prior to nvmet_check_cqid. With the addition of this helper function, the CQ ID checks in the nvmet_execute_x() function can be removed, and instead simply call nvmet_check_io_cqid() in place of nvmet_check_cqid(). Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvmet-auth: authenticate on admin queue onlyHannes Reinecke
Do not start authentication on I/O queues as it doesn't really add value, and secure concatenation disallows it anyway. Authentication commands on I/O queues are not aborted, so the host may still run the authentication protocol on I/O queues. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvme-auth: do not re-authenticate queues with no prior authenticationHannes Reinecke
When sending 'connect' the queues can figure out from the return code whether authentication is required or not. But reauthentication doesn't disconnect the queues, so this check is not available. Rather we need to check whether the queue had been authenticated initially to figure out if we need to reauthenticate. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvmet-tcp: switch to using the crc32c libraryEric Biggers
Now that the crc32c() library function directly takes advantage of architecture-specific optimizations, it is unnecessary to go through the crypto API. Just use crc32c(). This is much simpler, and it improves performance due to eliminating the crypto API overhead. Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvmet: replace strncpy with strscpyMarcelo Moreira
The strncpy() function is deprecated for NUL-terminated strings as explained in the "strncpy() on NUL-terminated strings" section of Documentation/process/deprecated.rst. The key issues are: - strncpy() fails to guarantee NULL-termination when source > destination - it unnecessarily zero-pads short strings, causing performance overhead strscpy() is the proper replacement because: - it guarantees NULL-termination - it avoids redundant zero-padding - it aligns with current kernel string-copying best practice memcpy() was rejected because: - NQN buffers (subsysnqn/hostnqn) are treated as NULL-terminated strings: - strcmp() usage in nvmet_host_allowed() (discovery.c) - strscpy() to copy subsysnqn in nvmet_execute_disc_identify() seq_buf wasn't used because: - this is a simple fixed-size buffer copy - there is no need for progressive string construction features Signed-off-by: Marcelo Moreira <marcelomoreira1905@gmail.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvme-tcp: open-code nvme_tcp_queue_request() for R2THannes Reinecke
When handling an R2T PDU we short-circuit nvme_tcp_queue_request() as we should not attempt to send consecutive PDUs. So open-code nvme_tcp_queue_request() for R2T and drop the last argument. Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
2025-05-20nvme-tcp: remove redundant check to ctrl->optsHannes Reinecke
When checking for secure concatenation we have already validated that 'ctrl->opts' is set, so we can remove this check. Reported-by: Dan Carpenter <dan.carpenter@linaro.org> Signed-off-by: Hannes Reinecke <hare@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-20nvme-loop: avoid -Wflex-array-member-not-at-end warningGustavo A. R. Silva
-Wflex-array-member-not-at-end was introduced in GCC-14, and we are getting ready to enable it, globally. Move the conflicting declaration to the end of the structure. Notice that `struct nvme_loop_iod` is a flexible structure --a structure that contains a flexible-array member. Fix the following warning: drivers/nvme/target/loop.c:36:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end] Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2025-05-19Merge branch '200GbE' of ↵Jakub Kicinski
git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue Tony Nguyen says: ==================== idpf: add initial PTP support Milena Olech says: This patch series introduces support for Precision Time Protocol (PTP) to Intel(R) Infrastructure Data Path Function (IDPF) driver. PTP feature is supported when the PTP capability is negotiated with the Control Plane (CP). IDPF creates a PTP clock and sets a set of supported functions. During the PTP initialization, IDPF requests a set of PTP capabilities and receives a writeback from the CP with the set of supported options. These options are: - get time of the PTP clock - set the time of the PTP clock - adjust the PTP clock - Tx timestamping Each feature is considered to have direct access, where the operations on PCIe BAR registers are allowed, or the mailbox access, where the virtchnl messages are used to perform any PTP action. Mailbox access means that PTP requests are sent to the CP through dedicated secondary mailbox and the CP reads/writes/modifies desired resource - PTP Clock or Tx timestamp registers. Tx timestamp capabilities are negotiated only for vports that have UPLINK_VPORT flag set by the CP. Capabilities provide information about the number of available Tx timestamp latches, their indexes and size of the Tx timestamp value. IDPF requests Tx timestamp by setting the TSYN bit and the requested timestamp index in the context descriptor for the PTP packets. When the completion tag for that packet is received, IDPF schedules a worker to read the Tx timestamp value. * '200GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue: idpf: add support for Rx timestamping idpf: add Tx timestamp flows idpf: add Tx timestamp capabilities negotiation idpf: add PTP clock configuration idpf: add mailbox access to read PTP clock time idpf: negotiate PTP capabilities and get PTP clock idpf: move virtchnl structures to the header file virtchnl: add PTP virtchnl definitions idpf: add initial PTP support idpf: change the method for mailbox workqueue allocation ==================== Link: https://patch.msgid.link/20250516170645.1172700-1-anthony.l.nguyen@intel.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-05-19docs: firmware: qcom_scm: Fix kernel-doc warningUnnathi Chalicheemala
Add description for members of qcom_scm_desc struct to avoid: drivers/firmware/qcom/qcom_scm.h:56: warning: Function parameter or struct member 'svc' not described in 'qcom_scm_desc' drivers/firmware/qcom/qcom_scm.h:56: warning: Function parameter or struct member 'cmd' not described in 'qcom_scm_desc' drivers/firmware/qcom/qcom_scm.h:56: warning: Function parameter or struct member 'owner' not described in 'qcom_scm_desc' Signed-off-by: Unnathi Chalicheemala <unnathi.chalicheemala@oss.qualcomm.com> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> Link: https://lore.kernel.org/r/20250403-fix_scm_doc_warn-v1-1-9cd36345db77@oss.qualcomm.com Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2025-05-19i2c: mlxbf: Use str_read_write() helperFeng Wei
Remove hard-coded strings by using the str_read_write() helper. Signed-off-by: Feng Wei <feng.wei8@zte.com.cn> Signed-off-by: Shao Mingyin <shao.mingyin@zte.com.cn> Link: https://lore.kernel.org/r/20250401192603311H5OxuFmUSbPc4VnQQkhZr@zte.com.cn Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: thunderx: Use non-hybrid PCI devres APIPhilipp Stanner
thunderx enables its PCI device with pcim_enable_device(). This, implicitly, switches the function pci_request_regions() into managed mode, where it becomes a devres function. The PCI subsystem wants to remove this hybrid nature from its interfaces. To do so, users of the aforementioned combination of functions must be ported to non-hybrid functions. Replace the call to sometimes-managed pci_request_regions() with one to the always-managed pcim_request_all_regions(). Signed-off-by: Philipp Stanner <phasta@kernel.org> Link: https://lore.kernel.org/r/20250417082511.22272-3-phasta@kernel.org Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: ismt: Use non-hybrid PCI devres APIPhilipp Stanner
ismt enables its PCI device with pcim_enable_device(). This, implicitly, switches the function pci_request_region() into managed mode, where it becomes a devres function. The PCI subsystem wants to remove this hybrid nature from its interfaces. To do so, users of the aforementioned combination of functions must be ported to non-hybrid functions. Replace the call to sometimes-managed pci_request_region() with one to the always-managed pcim_request_region(). Signed-off-by: Philipp Stanner <phasta@kernel.org> Link: https://lore.kernel.org/r/20250417082511.22272-2-phasta@kernel.org Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: davinci: add I2C_FUNC_PROTOCOL_MANGLING to feature listMarcus Folkesson
The driver do support I2C_M_IGNORE_NAK, so add I2C_FUNC_PROTOCOL_MANGLING to the feature list. Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Acked-by: Mukesh Kumar Savaliya <quic_msavaliy@quicinc.com> Link: https://lore.kernel.org/r/20250326-i2c-v1-1-82409ebe9f2b@gmail.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: smbus: introduce Write Disable-aware SPD instantiating functionsYo-Jung (Leo) Lin
Some SMBus controllers may restrict writes to addresses where SPD sensors may reside. This may lead to some SPD sensors not functioning correctly, and might need extra handling. Introduce new SPD-instantiating functions that are aware of this, and use them instead. Signed-off-by: Yo-Jung Lin (Leo) <leo.lin@canonical.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20250430-for-upstream-i801-spd5118-no-instantiate-v2-1-2f54d91ae2c7@canonical.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: riic: Implement bus recoveryLad Prabhakar
Implement I2C bus recovery support for the RIIC controller by making use of software-controlled SCL and SDA line manipulation. The controller allows forcing SCL and SDA levels through control bits, which enables generation of manual clock pulses and a stop condition to free a stuck bus. This implementation wires up the bus recovery mechanism using i2c_generic_scl_recovery and provides get/set operations for SCL and SDA. This allows the RIIC driver to recover from bus hang scenarios where SDA is held low by a slave. Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com> Link: https://lore.kernel.org/r/20250501204003.141134-1-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: tegra: check msg length in SMBUS block readAkhil R
For SMBUS block read, do not continue to read if the message length passed from the device is '0' or greater than the maximum allowed bytes. Signed-off-by: Akhil R <akhilrajeev@nvidia.com> Acked-by: Thierry Reding <treding@nvidia.com> Link: https://lore.kernel.org/r/20250424053320.19211-1-akhilrajeev@nvidia.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: pasemi: Log bus reset causesHector Martin
This ensures we get all information we need to debug issues when users forward us their logs. Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Neal Gompa <neal@gompa.dev> Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Signed-off-by: Sven Peter <sven@svenpeter.dev> Link: https://lore.kernel.org/r/20250427-pasemi-fixes-v3-4-af28568296c0@svenpeter.dev Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: pasemi: Improve error recoveryHector Martin
Add handling for all the missing error condition, and better recovery in pasemi_smb_clear(). Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Reviewed-by: Neal Gompa <neal@gompa.dev> Signed-off-by: Hector Martin <marcan@marcan.st> Co-developed-by: Sven Peter <sven@svenpeter.dev> Signed-off-by: Sven Peter <sven@svenpeter.dev> Link: https://lore.kernel.org/r/20250427-pasemi-fixes-v3-3-af28568296c0@svenpeter.dev Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: pasemi: Improve timeout handlingSven Peter
The hardware (supposedly) has a 25ms timeout for clock stretching and the driver uses 100ms which should be plenty. The interrupt path however misses handling for errors while waiting for the completion and the polling path uses an open-coded readx_poll_timeout. Note that we drop reg_write(smbus, REG_SMSTA, status) while fixing those issues here which will be done anyway whenever the next transaction starts via pasemi_smb_clear. Signed-off-by: Sven Peter <sven@svenpeter.dev> Link: https://lore.kernel.org/r/20250427-pasemi-fixes-v3-2-af28568296c0@svenpeter.dev Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: pasemi: Enable the unjam machineHector Martin
The I2C bus can get stuck under some conditions (desync between controller and device). The pasemi controllers include an unjam feature that is enabled on reset, but was being disabled by the driver. Keep it enabled by explicitly setting the UJM bit in the CTL register. This should help recover the bus from certain conditions, which would otherwise remain stuck forever. Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Neal Gompa <neal@gompa.dev> Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Signed-off-by: Sven Peter <sven@svenpeter.dev> Link: https://lore.kernel.org/r/20250427-pasemi-fixes-v3-1-af28568296c0@svenpeter.dev Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: iproc: Remove unnecessary double negationAndi Shyti
True is true when greater than '0', no need for double negation inside the if statement. Link: https://lore.kernel.org/r/20250418211635.2666234-11-andi.shyti@kernel.org Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: iproc: When there's an error treat it as an errorAndi Shyti
If the xfer fails, it indicates a real error. Log it with an error message instead of a debug message to reflect its severity. Link: https://lore.kernel.org/r/20250418211635.2666234-10-andi.shyti@kernel.org Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: iproc: Move function and avoid prototypesAndi Shyti
Shuffle a bit the code in order to avoid prototypes. Link: https://lore.kernel.org/r/20250426201920.272135-1-andi.shyti@kernel.org Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: iproc: Fix indentation of bcm_iproc_i2c_slave_init()Andi Shyti
Adjust the indentation of the bcm_iproc_i2c_slave_init() function definition to match standard kernel coding style. Don't end the line with an open parenthesis. Link: https://lore.kernel.org/r/20250418211635.2666234-8-andi.shyti@kernel.org Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: iproc: Replace udelay() with usleep_range()Andi Shyti
Replace udelay(100) with usleep_range(100, 200) as recommended by kernel documentation. The delay is not in atomic context, so busy-waiting is unnecessary. Also update the comment for clarity. Link: https://lore.kernel.org/r/20250418211635.2666234-7-andi.shyti@kernel.org Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: iproc: Remove stray blank line in slave ISRAndi Shyti
Drop an unnecessary blank line in bcm_iproc_i2c_slave_isr(). Link: https://lore.kernel.org/r/20250418211635.2666234-6-andi.shyti@kernel.org Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: iproc: Fix alignment to match the open parenthesisAndi Shyti
Alignment should match the open parenthesis but in some places it didn't Link: https://lore.kernel.org/r/20250418211635.2666234-5-andi.shyti@kernel.org Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: iproc: Use u32 instead of uint32_tAndi Shyti
In the kernel u32 should be used instead of unit32_t. Link: https://lore.kernel.org/r/20250418211635.2666234-4-andi.shyti@kernel.org Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: iproc: Use dev_err_probe in probeAndi Shyti
Use dev_err_probe() instead of dev_err() and then return. Link: https://lore.kernel.org/r/20250418211635.2666234-3-andi.shyti@kernel.org Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: iproc: Drop unnecessary initialisation of 'ret'Andi Shyti
The 'ret' variable doesn't need to be initialised, as it is always assigned before use. While here, reorder the variable declarations in reverse Christmas tree style, by line length. Link: https://lore.kernel.org/r/20250418211635.2666234-2-andi.shyti@kernel.org Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: amd-isp: Add ISP i2c-designware driverPratap Nirujogi
The camera sensor is connected via ISP I2C bus in AMD SOC architectures. Add new I2C designware driver to support new camera sensors on AMD HW. Co-developed-by: Venkata Narendra Kumar Gutta <vengutta@amd.com> Signed-off-by: Venkata Narendra Kumar Gutta <vengutta@amd.com> Co-developed-by: Bin Du <bin.du@amd.com> Signed-off-by: Bin Du <bin.du@amd.com> Signed-off-by: Pratap Nirujogi <pratap.nirujogi@amd.com> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Link: https://lore.kernel.org/r/20250424184952.1290019-1-pratap.nirujogi@amd.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: octeon: add block-mode i2c operationsAryan Srivastava
Add functions to perform block read and write operations. This applies for cases where the requested operation is for >8 bytes of data. When not using the block mode transfer, the driver will attempt a series of 8 byte i2c operations until it reaches the desired total. For example, for a 40 byte request the driver will complete 5 separate transactions. This results in large transactions taking a significant amount of time to process. Add block mode such that the driver can request larger transactions, up to 1024 bytes per transfer. Many aspects of the block mode transfer is common with the regular 8 byte operations. Use generic functions for parts of the message construction and sending the message. The key difference for the block mode is the usage of separate FIFO buffer to store data. Write to this buffer in the case of a write (before command send). Read from this buffer in the case of a read (after command send). Data is written into this buffer by placing data into the MSB onwards. This means the bottom 8 bits of the data will match the top 8 bits, and so on and so forth. Set specific bits in message for block mode, enable block mode transfers from global i2c management registers, construct message, send message, read or write from FIFO buffer as required. The block-mode transactions result in a significant speed increase in large i2c requests. Signed-off-by: Aryan Srivastava <aryan.srivastava@alliedtelesis.co.nz> Link: https://lore.kernel.org/r/20250324192946.3078712-2-aryan.srivastava@alliedtelesis.co.nz Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: pasemi: Sort includes alphabeticallySven Peter
No functional changes. Signed-off-by: Sven Peter <sven@svenpeter.dev> Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Reviewed-by: Neal Gompa <neal@gompa.dev> Link: https://lore.kernel.org/r/20250415-pasemi-fixes-v2-2-c543bf53151a@svenpeter.dev Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: pasemi: Use correct bits.h includeSven Peter
When changing the #defines to use BIT and GENMASK the bitfield.h include was added instead of the correct bits.h include. Reported-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Sven Peter <sven@svenpeter.dev> Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Reviewed-by: Neal Gompa <neal@gompa.dev> Link: https://lore.kernel.org/r/20250415-pasemi-fixes-v2-1-c543bf53151a@svenpeter.dev Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: designware: Use better constants from units.hAndy Shevchenko
When we use constants in a time or frequency related contexts, it's better to utilise the respective definitions that have encoded units in them. This will make code better to read and understand. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Acked-by: Mukesh Kumar Savaliya <quic_msavaliy@quicinc.com> Link: https://lore.kernel.org/r/20250416101702.2128740-1-andriy.shevchenko@linux.intel.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: scx200_acb: Replace dev_err() with dev_err_probe() in probe functionEnrico Zanda
This simplifies the code while improving log. Signed-off-by: Enrico Zanda <e.zanda1@gmail.com> Link: https://lore.kernel.org/r/20250415183447.396277-11-e.zanda1@gmail.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: i2c-xiic: Replace dev_err() with dev_err_probe() in probe functionEnrico Zanda
This simplifies the code while improving log. Signed-off-by: Enrico Zanda <e.zanda1@gmail.com> Link: https://lore.kernel.org/r/20250415183447.396277-10-e.zanda1@gmail.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: virtio: Replace dev_err() with dev_err_probe() in probe functionEnrico Zanda
This simplifies the code while improving log. Signed-off-by: Enrico Zanda <e.zanda1@gmail.com> Link: https://lore.kernel.org/r/20250415183447.396277-8-e.zanda1@gmail.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: viperboard: Replace dev_err() with dev_err_probe() in probe functionEnrico Zanda
This simplifies the code while improving log. Signed-off-by: Enrico Zanda <e.zanda1@gmail.com> Link: https://lore.kernel.org/r/20250415183447.396277-7-e.zanda1@gmail.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: viapro: Replace dev_err() with dev_err_probe() in probe functionEnrico Zanda
This simplifies the code while improving log. Signed-off-by: Enrico Zanda <e.zanda1@gmail.com> Link: https://lore.kernel.org/r/20250415183447.396277-6-e.zanda1@gmail.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: via: Replace dev_err() with dev_err_probe() in probe functionEnrico Zanda
This simplifies the code while improving log. Signed-off-by: Enrico Zanda <e.zanda1@gmail.com> Link: https://lore.kernel.org/r/20250415183447.396277-4-e.zanda1@gmail.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-05-19i2c: uniphier: Replace dev_err() with dev_err_probe() in probe functionEnrico Zanda
This simplifies the code while improving log. Signed-off-by: Enrico Zanda <e.zanda1@gmail.com> Link: https://lore.kernel.org/r/20250415183447.396277-3-e.zanda1@gmail.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>