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2020-04-30RDMA/mlx5: Combine copy of create QP command in RSS RAW QPLeon Romanovsky1-74/+82
Change the create QP flow to handle all copy_from_user() operations in one place. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-30RDMA/mlx5: Promote RSS RAW QP attribute check in higher levelLeon Romanovsky1-3/+3
Perform check of attributes of RAW PACKET QP in separate function. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-30RDMA/mlx5: Store QP type in the vendor QP structureLeon Romanovsky3-73/+74
QP type is stored in the IB/core QP struct, but it doesn't have all the needed information, like internal QP type used in the driver itself. Update mlx5_ib to have cached QP type which includes both IBTA and Mellanox specific one. Such change allows us to make even further cleanup of QP creation flow. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-30RDMA/mlx5: Delete unsupported QP typesLeon Romanovsky1-11/+1
There is no need to explicitly check unsupported QP types, rely on "default" keyword in switch-case to catch them. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28Merge branch 'mlx5_ib_qp_refactor_1' into rdma.git for-nextJason Gunthorpe16-631/+1255
Leon Romanovsky says: ==================== This is first part of series which tries to return some sanity to mlx5_ib_create_qp() function. Such refactoring is required to make extension of that function with less worries of breaking driver. Extra goal of such refactoring is to ensure that QP is allocated at the beginning of function and released at the end. It will allow us to move QP allocation to be under IB/core responsibility. ==================== Based on the mlx5-next branch at git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux Due to dependencies * branch 'mlx5_ib_qp_refactor_1': (66 commits) RDMA/mlx5: Process all vendor flags in one place RDMA/mlx5: Return all configured create flags through query QP RDMA/mlx5: Change scatter CQE flag to be set like other vendor flags RDMA/mlx5: Use flags_en mechanism to mark QP created with WQE signature RDMA/mlx5: Process create QP flags in one place RDMA/mlx5: Delete create QP flags obfuscation RDMA/mlx5: Initial separation of RAW_PACKET QP from common flow RDMA/mlx5: Remove second copy from user for non RSS RAW QPs RDMA/mlx5: Move DRIVER QP flags check into separate function RDMA/mlx5: Update all DRIVER QP places to use QP subtype RDMA/mlx5: Split scatter CQE configuration for DCT QP RDMA/mlx5: Separate create QP flows to be based on type RDMA/mlx5: Set QP subtype immediately when it is known RDMA/mlx5: Avoid setting redundant NULL for XRC QPs RDMA/mlx5: Prepare QP allocation for future removal RDMA/mlx5: Perform check if QP creation flow is valid RDMA/mlx5: Delete impossible GSI port check RDMA/mlx5: Organize QP types checks in one place Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Process all vendor flags in one placeLeon Romanovsky1-85/+71
Check that vendor flags provided through ucmd are valid. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Return all configured create flags through query QPLeon Romanovsky2-12/+2
The "flags" field in struct mlx5_ib_qp contains all UAPI flags configured at the create QP stage. Return all the data as is without masking. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Change scatter CQE flag to be set like other vendor flagsLeon Romanovsky2-8/+10
In similar way to wqe_sig, the scat_cqe was treated differently from other create QP vendor flags. Change it to be similar to other flags and use flags_en mechanism. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Use flags_en mechanism to mark QP created with WQE signatureLeon Romanovsky3-16/+23
MLX5_QP_FLAG_SIGNATURE is exposed to the users but in the kernel the create_qp flow treated it differently from other MLX5_QP_FLAG_*s. Fix it by ditching wq_sig boolean variable and use general flag_en mechanism. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Process create QP flags in one placeLeon Romanovsky1-99/+101
create_flags is checked in too many places and scattered across all the code, consolidate all the checks inside one function, so we will be easily see the flow. As part of such change, delete unreachable code, because IB/core is responsible sanitize the input. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Delete create QP flags obfuscationLeon Romanovsky5-64/+47
There is no point in redefinition of stable and exposed to users create flags. Their values won't be changed and it is equal to used by the mlx5. Delete the mlx5 definitions and use IB/core fields. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Initial separation of RAW_PACKET QP from common flowLeon Romanovsky1-5/+17
Create initial function for IB_QPT_RAW_PACKET flow. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Remove second copy from user for non RSS RAW QPsLeon Romanovsky1-29/+27
Change the common code to use already copied user command buffer. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Move DRIVER QP flags check into separate functionLeon Romanovsky1-48/+43
Perform validation of DRIVER QP in relevant function. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Update all DRIVER QP places to use QP subtypeLeon Romanovsky1-33/+15
Instead of overwriting QP init attributes with driver QP subtype, use that subtype directly. This change will allow us to remove logic which cached QP init attributes. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Split scatter CQE configuration for DCT QPLeon Romanovsky1-9/+6
DCT QPs have separate creation flow and can be easily extracted from configure_responder_scat_cqe(), this makes both updated functions more clear. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Separate create QP flows to be based on typeLeon Romanovsky1-15/+39
Move driver QP creation flow to separate functions to simplify the create_qp() and allow future separation of create_qp_common() to subtypes. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Set QP subtype immediately when it is knownLeon Romanovsky1-4/+2
There is no need to delay QP subtype assignment to the end of the create_qp() function and it is better to move it to be immediately after it is checked so we would be able to rewrite later checks to be based on it and not on over-written struct ib_qp_init_attr. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Avoid setting redundant NULL for XRC QPsLeon Romanovsky1-7/+1
There is no need to set NULL in recv_cq and send_cq, they are already set to NULL by the IB/core logic. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Prepare QP allocation for future removalLeon Romanovsky1-25/+20
Unify the QP memory allocation across different paths, so it will be in one place. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Perform check if QP creation flow is validLeon Romanovsky1-67/+61
Fast check that kernel and user flows provides enough data to create QP. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Delete impossible GSI port checkLeon Romanovsky1-9/+0
GSI QP is created in the kernel with very strict parameters, there is no possible way that port number will be wrong in such flow. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28RDMA/mlx5: Organize QP types checks in one placeLeon Romanovsky1-61/+68
Perform check if QP type is supported in one place at the beginning of the create_qp function instead of current implementation with checks buried inside of the code. Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-28net/mlx5: Refactor imm_inval_pkey field in cqe structRaed Salem1-4/+4
The imm_inval_pkey field can hold four different types of data, depends on the usage, the data could be one of the below: - Immediate field of the received message - Invalidate rkey - Pkey of the packet - Flow table metadata Current implementation doesn't reflect the intended usage of the field at usage time. Reflect the different types by replace this field with a union, modify code where this field is used to reflect its intended usage. Signed-off-by: Raed Salem <[email protected]> Reviewed-by: Huy Nguyen <[email protected]> Reviewed-by: Tariq Toukan <[email protected]> Signed-off-by: Saeed Mahameed <[email protected]>
2020-04-28net/mlx5: Use aligned variable while allocating ICM memoryErez Shitrit1-1/+1
The alignment value is part of the input structure, so use it and spare extra memory allocation when is not needed. Now, using the new ability when allocating icm for Direct-Rule insertion. Signed-off-by: Ariel Levkovich <[email protected]> Signed-off-by: Erez Shitrit <[email protected]> Signed-off-by: Saeed Mahameed <[email protected]>
2020-04-28net/mlx5: Add support for COPY steering actionHuy Nguyen1-2/+2
Add COPY type to modify_header action. IPsec feature is the first feature that needs COPY steering action. Signed-off-by: Huy Nguyen <[email protected]> Signed-off-by: Raed Salem <[email protected]> Signed-off-by: Saeed Mahameed <[email protected]> Acked-by: Leon Romanovsky <[email protected]>
2020-04-23net/mlx5: Update transobj.c new cmd interfaceLeon Romanovsky1-17/+15
Do mass update of transobj.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Signed-off-by: Leon Romanovsky <[email protected]>
2020-04-23net/mlx5: Update vport.c to new cmd interfaceLeon Romanovsky2-3/+3
Do mass update of vport.c to reuse newly introduced mlx5_cmd_exec_in*() interfaces. Signed-off-by: Leon Romanovsky <[email protected]>
2020-04-22RDMA/mlx5: Set GRH fields in query QP on RoCEAharon Landau1-1/+3
GRH fields such as sgid_index, hop limit, et. are set in the QP context when QP is created/modified. Currently, when query QP is performed, we fill the GRH fields only if the GRH bit is set in the QP context, but this bit is not set for RoCE. Adjust the check so we will set all relevant data for the RoCE too. Since this data is returned to userspace, the below is an ABI regression. Fixes: d8966fcd4c25 ("IB/core: Use rdma_ah_attr accessor functions") Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Aharon Landau <[email protected]> Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-19net/mlx5: Move QP logic to mlx5_ibLeon Romanovsky10-34/+694
The mlx5_core doesn't need any functionality coded in qp.c, so move that file to drivers/infiniband/ be under mlx5_ib responsibility. Reviewed-by: Saeed Mahameed <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]>
2020-04-19RDMA/mlx5: Alphabetically sort build artifactsLeon Romanovsky1-7/+20
Sort .o objects in makefile to make addition of new object less cumbersome. Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]>
2020-04-19net/mlx5: Delete not-used cmd headerLeon Romanovsky2-2/+0
The structures defined in the cmd header are not used and can be safely removed from the driver. This patch removes that file and deletes all relevant includes. Signed-off-by: Leon Romanovsky <[email protected]>
2020-04-19RDMA/mlx5: Delete Q counter allocations commandLeon Romanovsky4-31/+20
Remove mlx5_ib implementation of Q counter allocation logic together with cleaning boolean which controlled validity of the counter. It is not needed, because counter_id == 0 means that counter is not valid. Reviewed-by: Saeed Mahameed <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]>
2020-04-19net/mlx5: Remove Q counter low level helper APIsLeon Romanovsky1-23/+32
mlx5 core users are encouraged to use low level API (mlx5_cmd_exec) without the need of helper functions, do this for q counters, remove helper functions and call mlx5_cmd_exec directly from users. This will help reduce the total amount of code and reduction of the mlx5_core symbol table. Reviewed-by: Saeed Mahameed <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]>
2020-04-14RDMA/mlx5: Fix udata response upon SRQ creationYishai Hadas1-2/+8
Fix udata response upon SRQ creation to use the UAPI structure (i.e. mlx5_ib_create_srq_resp). It did not zero the reserved field in userspace. Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters") Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Yishai Hadas <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-04-01Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdmaLinus Torvalds11-360/+822
Pull rdma updates from Jason Gunthorpe: "The majority of the patches are cleanups, refactorings and clarity improvements. This cycle saw some more activity from Syzkaller, I think we are now clean on all but one of those bugs, including the long standing and obnoxious rdma_cm locking design defect. Continue to see many drivers getting cleanups, with a few new user visible features. Summary: - Various driver updates for siw, bnxt_re, rxe, efa, mlx5, hfi1 - Lots of cleanup patches for hns - Convert more places to use refcount - Aggressively lock the RDMA CM code that syzkaller says isn't working - Work to clarify ib_cm - Use the new ib_device lifecycle model in bnxt_re - Fix mlx5's MR cache which seems to be failing more often with the new ODP code - mlx5 'dynamic uar' and 'tx steering' user interfaces" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (144 commits) RDMA/bnxt_re: make bnxt_re_ib_init static IB/qib: Delete struct qib_ivdev.qp_rnd RDMA/hns: Fix uninitialized variable bug RDMA/hns: Modify the mask of QP number for CQE of hip08 RDMA/hns: Reduce the maximum number of extend SGE per WQE RDMA/hns: Reduce PFC frames in congestion scenarios RDMA/mlx5: Add support for RDMA TX flow table net/mlx5: Add support for RDMA TX steering IB/hfi1: Call kobject_put() when kobject_init_and_add() fails IB/hfi1: Fix memory leaks in sysfs registration and unregistration IB/mlx5: Move to fully dynamic UAR mode once user space supports it IB/mlx5: Limit the scope of struct mlx5_bfreg_info to mlx5_ib IB/mlx5: Extend QP creation to get uar page index from user space IB/mlx5: Extend CQ creation to get uar page index from user space IB/mlx5: Expose UAR object and its alloc/destroy commands IB/hfi1: Get rid of a warning RDMA/hns: Remove redundant judgment of qp_type RDMA/hns: Remove redundant assignment of wc->smac when polling cq RDMA/hns: Remove redundant qpc setup operations RDMA/hns: Remove meaningless prints ...
2020-03-29Merge branch 'mlx5-next' of ↵Saeed Mahameed3-15/+56
git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux * 'mlx5-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux: mlx5: Remove uninitialized use of key in mlx5_core_create_mkey {IB,net}/mlx5: Move asynchronous mkey creation to mlx5_ib {IB,net}/mlx5: Assign mkey variant in mlx5_ib only {IB,net}/mlx5: Setup mkey variant before mr create command invocation Signed-off-by: Saeed Mahameed <[email protected]>
2020-03-29Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller4-4/+34
Minor comment conflict in mac80211. Signed-off-by: David S. Miller <[email protected]>
2020-03-27Merge branch 'mlx5_tx_steering' into rdma.git for-nextJason Gunthorpe3-0/+11
Leon Romanovsky says: ==================== Those two patches from Michael extends mlx5_core and mlx5_ib flow steering to support RDMA TX in similar way to already supported RDMA RX. ==================== Based on the mlx5-next branch at git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux Due to dependencies * branch 'mlx5_tx_steering': RDMA/mlx5: Add support for RDMA TX flow table net/mlx5: Add support for RDMA TX steering
2020-03-27RDMA/mlx5: Add support for RDMA TX flow tableMichael Guralnik3-0/+11
Enable user application to add rules for RDMA TX steering table. Rules in this steering table will allow to steer transmitted RDMA traffic. Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Michael Guralnik <[email protected]> Reviewed-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-03-27IB/mlx5: Move to fully dynamic UAR mode once user space supports itYishai Hadas4-3/+25
Move to fully dynamic UAR mode once user space supports it. In this case we prevent any legacy mode of UARs on the allocated context and prevent redundant allocation of the static ones. Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Yishai Hadas <[email protected]> Reviewed-by: Michael Guralnik <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-03-27IB/mlx5: Limit the scope of struct mlx5_bfreg_info to mlx5_ibLeon Romanovsky1-0/+17
struct mlx5_bfreg_info is used by mlx5_ib only but is exposed to both RDMA and netdev parts of mlx5 driver. Move that struct to mlx5_ib namespace, clean vertical space alignment and convert lib_uar_4k from bool to bitfield. Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-03-27IB/mlx5: Extend QP creation to get uar page index from user spaceYishai Hadas1-10/+17
Extend QP creation to get uar page index from user space, this mode can be used with the UAR dynamic mode APIs to allocate/destroy a UAR object. As part of enabling this option blocked the weird/un-supported cross channel option which uses index 0 hard-coded. This QP flag wasn't exposed to user space as part of any formal upstream release, the dynamic option can allow having valid UAR page index instead. Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Yishai Hadas <[email protected]> Reviewed-by: Michael Guralnik <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-03-27IB/mlx5: Extend CQ creation to get uar page index from user spaceYishai Hadas1-6/+11
Extend CQ creation to get uar page index from user space, this mode can be used with the UAR dynamic mode APIs to allocate/destroy a UAR object. Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Yishai Hadas <[email protected]> Reviewed-by: Michael Guralnik <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-03-27IB/mlx5: Expose UAR object and its alloc/destroy commandsYishai Hadas2-9/+165
Expose UAR object and its alloc/destroy commands to be used over the ioctl interface by user space applications. This API supports both BF & NC modes and enables a dynamic allocation of UARs once really needed. As the number of driver objects were limited by the core ones when the merged tree is prepared, had to decrease the number of core objects to enable the new UAR object usage. Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Yishai Hadas <[email protected]> Reviewed-by: Michael Guralnik <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-03-25RDMA/mlx5: Block delay drop to unprivileged usersMaor Gottlieb1-0/+4
It has been discovered that this feature can globally block the RX port, so it should be allowed for highly privileged users only. Fixes: 03404e8ae652("IB/mlx5: Add support to dropless RQ") Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Maor Gottlieb <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-03-24IB/mlx5: Generally use the WC auto detection test resultYishai Hadas2-13/+5
Now that we have direct and reliable detection of WC support by the system, use is broadly. The only case we have to worry about is when the WC autodetector cannot run. For this fringe case generally assume that that WC is available, except in the well defined case of no PAT support on x86 which is tested by calling arch_can_pci_mmap_wc(). If WC is wrongly assumed to be available then it causes a small performance hit on paths in userspace that are tuned to the assumption that WC is available. There is no functional loss. It is very unlikely that any platforms exist that lack WC and also care about the micro optimization of WC in the fringe case where autodetection does not work. By removing the fairly bogus CONFIG tests this makes WC work broadly on all arches and all platforms. Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Yishai Hadas <[email protected]> Reviewed-by: Michael Guralnik <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-03-24RDMA/mlx5: Fix access to wrong pointer while performing flush due to errorLeon Romanovsky3-2/+27
The main difference between send and receive SW completions is related to separate treatment of WQ queue. For receive completions, the initial index to be flushed is stored in "tail", while for send completions, it is in deleted "last_poll". CPU: 54 PID: 53405 Comm: kworker/u161:0 Kdump: loaded Tainted: G OE --------- -t - 4.18.0-147.el8.ppc64le #1 Workqueue: ib-comp-unb-wq ib_cq_poll_work [ib_core] NIP: c000003c7c00a000 LR: c00800000e586af4 CTR: c000003c7c00a000 REGS: c0000036cc9db940 TRAP: 0400 Tainted: G OE --------- -t - (4.18.0-147.el8.ppc64le) MSR: 9000000010009033 <SF,HV,EE,ME,IR,DR,RI,LE> CR: 24004488 XER: 20040000 CFAR: c00800000e586af0 IRQMASK: 0 GPR00: c00800000e586ab4 c0000036cc9dbbc0 c00800000e5f1a00 c0000037d8433800 GPR04: c000003895a26800 c0000037293f2000 0000000000000201 0000000000000011 GPR08: c000003895a26c80 c000003c7c00a000 0000000000000000 c00800000ed30438 GPR12: c000003c7c00a000 c000003fff684b80 c00000000017c388 c00000396ec4be40 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR20: c00000000151e498 0000000000000010 c000003895a26848 0000000000000010 GPR24: 0000000000000010 0000000000010000 c000003895a26800 0000000000000000 GPR28: 0000000000000010 c0000037d8433800 c000003895a26c80 c000003895a26800 NIP [c000003c7c00a000] 0xc000003c7c00a000 LR [c00800000e586af4] __ib_process_cq+0xec/0x1b0 [ib_core] Call Trace: [c0000036cc9dbbc0] [c00800000e586ab4] __ib_process_cq+0xac/0x1b0 [ib_core] (unreliable) [c0000036cc9dbc40] [c00800000e586c88] ib_cq_poll_work+0x40/0xb0 [ib_core] [c0000036cc9dbc70] [c000000000171f44] process_one_work+0x2f4/0x5c0 [c0000036cc9dbd10] [c000000000172a0c] worker_thread+0xcc/0x760 [c0000036cc9dbdc0] [c00000000017c52c] kthread+0x1ac/0x1c0 [c0000036cc9dbe30] [c00000000000b75c] ret_from_kernel_thread+0x5c/0x80 Fixes: 8e3b68830186 ("RDMA/mlx5: Delete unreachable handle_atomic code by simplifying SW completion") Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-03-24IB/mlx5: Fix a NULL vs IS_ERR() checkDan Carpenter1-2/+2
The kzalloc() function returns NULL, not error pointers. Fixes: 30f2fe40c72b ("IB/mlx5: Introduce UAPIs to manage packet pacing") Link: https://lore.kernel.org/r/20200320132641.GF95012@mwanda Signed-off-by: Dan Carpenter <[email protected]> Acked-by: Leon Romanovsky <[email protected]> Signed-off-by: Jason Gunthorpe <[email protected]>
2020-03-13Merge branch 'mlx5_mr_cache' into rdma.git for-nextJason Gunthorpe4-283/+414
Leon Romanovsky says: ==================== This series fixes various corner cases in the mlx5_ib MR cache implementation, see specific commit messages for more information. ==================== Based on the mlx5-next branch at git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux Due to dependencies * branch 'mlx5_mr-cache': RDMA/mlx5: Allow MRs to be created in the cache synchronously RDMA/mlx5: Revise how the hysteresis scheme works for cache filling RDMA/mlx5: Fix locking in MR cache work queue RDMA/mlx5: Lock access to ent->available_mrs/limit when doing queue_work RDMA/mlx5: Fix MR cache size and limit debugfs RDMA/mlx5: Always remove MRs from the cache before destroying them RDMA/mlx5: Simplify how the MR cache bucket is located RDMA/mlx5: Rename the tracking variables for the MR cache RDMA/mlx5: Replace spinlock protected write with atomic var {IB,net}/mlx5: Move asynchronous mkey creation to mlx5_ib {IB,net}/mlx5: Assign mkey variant in mlx5_ib only {IB,net}/mlx5: Setup mkey variant before mr create command invocation
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