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| * treewide: kzalloc_node() -> kcalloc_node()Kees Cook2018-06-123-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kzalloc_node() function has a 2-factor argument form, kcalloc_node(). This patch replaces cases of: kzalloc_node(a * b, gfp, node) with: kcalloc_node(a * b, gfp, node) as well as handling cases of: kzalloc_node(a * b * c, gfp, node) with: kzalloc_node(array3_size(a, b, c), gfp, node) as it's slightly less ugly than: kcalloc_node(array_size(a, b), c, gfp, node) This does, however, attempt to ignore constant size factors like: kzalloc_node(4 * 1024, gfp, node) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ type TYPE; expression THING, E; @@ ( kzalloc_node( - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | kzalloc_node( - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression COUNT; typedef u8; typedef __u8; @@ ( kzalloc_node( - sizeof(u8) * (COUNT) + COUNT , ...) | kzalloc_node( - sizeof(__u8) * (COUNT) + COUNT , ...) | kzalloc_node( - sizeof(char) * (COUNT) + COUNT , ...) | kzalloc_node( - sizeof(unsigned char) * (COUNT) + COUNT , ...) | kzalloc_node( - sizeof(u8) * COUNT + COUNT , ...) | kzalloc_node( - sizeof(__u8) * COUNT + COUNT , ...) | kzalloc_node( - sizeof(char) * COUNT + COUNT , ...) | kzalloc_node( - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - kzalloc_node + kcalloc_node ( - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - kzalloc_node + kcalloc_node ( - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - kzalloc_node + kcalloc_node ( - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - kzalloc_node + kcalloc_node ( - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - kzalloc_node + kcalloc_node ( - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - kzalloc_node + kcalloc_node ( - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - kzalloc_node + kcalloc_node ( - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - kzalloc_node + kcalloc_node ( - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ identifier SIZE, COUNT; @@ - kzalloc_node + kcalloc_node ( - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( kzalloc_node( - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc_node( - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc_node( - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc_node( - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc_node( - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc_node( - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc_node( - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc_node( - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( kzalloc_node( - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kzalloc_node( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kzalloc_node( - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kzalloc_node( - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kzalloc_node( - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | kzalloc_node( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ identifier STRIDE, SIZE, COUNT; @@ ( kzalloc_node( - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc_node( - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc_node( - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc_node( - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc_node( - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc_node( - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc_node( - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc_node( - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression E1, E2, E3; constant C1, C2, C3; @@ ( kzalloc_node(C1 * C2 * C3, ...) | kzalloc_node( - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | kzalloc_node( - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | kzalloc_node( - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | kzalloc_node( - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( kzalloc_node(sizeof(THING) * C2, ...) | kzalloc_node(sizeof(TYPE) * C2, ...) | kzalloc_node(C1 * C2 * C3, ...) | kzalloc_node(C1 * C2, ...) | - kzalloc_node + kcalloc_node ( - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - kzalloc_node + kcalloc_node ( - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - kzalloc_node + kcalloc_node ( - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - kzalloc_node + kcalloc_node ( - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - kzalloc_node + kcalloc_node ( - (E1) * E2 + E1, E2 , ...) | - kzalloc_node + kcalloc_node ( - (E1) * (E2) + E1, E2 , ...) | - kzalloc_node + kcalloc_node ( - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
* | ntb: ntb_transport: Replace GFP_ATOMIC with GFP_KERNEL in ↵Jia-Ju Bai2018-06-111-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ntb_transport_create_queue ntb_transport_create_queue() is never called in atomic context. ntb_transport_create_queue() is only called by ntb_netdev_probe(), which is set as ".probe" in struct ntb_transport_client. Despite never getting called from atomic context, ntb_transport_create_queue() calls kzalloc_node() with GFP_ATOMIC, which does not sleep for allocation. GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL, which can sleep and improve the possibility of sucessful allocation. This is found by a static analysis tool named DCNS written by myself. And I also manually check it Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* | ntb: ntb_transport: Replace GFP_ATOMIC with GFP_KERNEL in ↵Jia-Ju Bai2018-06-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ntb_transport_setup_qp_mw ntb_transport_setup_qp_mw() is never called in atomic context. ntb_transport_setup_qp_mw() is only called by ntb_transport_link_work(), which is set as a parameter of INIT_DELAYED_WORK() in ntb_transport_probe(). Despite never getting called from atomic context, ntb_transport_setup_qp_mw() calls kzalloc_node() with GFP_ATOMIC, which does not sleep for allocation. GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL, which can sleep and improve the possibility of sucessful allocation. This is found by a static analysis tool named DCNS written by myself. And I also manually check it. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* | NTB: ntb_hw_idt: fix typo 'can by' to 'can be'Wolfram Sang2018-06-111-1/+1
| | | | | | | | | | | | Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* | ntb: intel: change references of skx to gen3Dave Jiang2018-06-114-130/+126
| | | | | | | | | | | | | | Change all references to skx to gen3 NTB. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* | ntb: intel: split out the gen3 codeDave Jiang2018-06-116-657/+754
| | | | | | | | | | | | | | | | | | Move the Intel hw gen3 code to its own source file. The ntb_hw_intel.c was getting too large and makes it hard to maintain with future hardware changes. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* | ntb: intel: header definitions refactorDave Jiang2018-06-114-142/+237
|/ | | | | | | Break out the generation specific definitions to different headers Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: ntb_perf: fix cast to restricted __le32Serge Semin2018-01-281-15/+13
| | | | | | | | | | | | | | | | | | | Sparse is whining about the u32 and __le32 mixed usage in the driver drivers/ntb/test/ntb_perf.c:288:21: warning: cast to restricted __le32 drivers/ntb/test/ntb_perf.c:295:37: warning: incorrect type in argument 4 (different base types) drivers/ntb/test/ntb_perf.c:295:37: expected unsigned int [unsigned] [usertype] val drivers/ntb/test/ntb_perf.c:295:37: got restricted __le32 [usertype] <noident> ... NTB hardware drivers shall accept CPU-endian data and translate it to the portable formate by internal means, so the explicit conversions are not necessary before Scratchpad/Messages API usage anymore. Fixes: b83003b3fdc1 ("NTB: ntb_perf: Add full multi-port NTB API support") Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb_perf: Fix an error code in perf_copy_chunk()Dan Carpenter2018-01-281-1/+2
| | | | | | | | | We accidentally return success if dmaengine_submit() fails. The fix is to preserve the error code from dma_submit_error(). Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb_hw_switchtec: Make function switchtec_ntb_remove() staticWei Yongjun2018-01-281-2/+2
| | | | | | | | | | | Fixes the following sparse warnings: drivers/ntb/hw/mscc/ntb_hw_switchtec.c:1552:6: warning: symbol 'switchtec_ntb_remove' was not declared. Should it be static? Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Reviewed-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: ntb_tool: fix memory leak on 'buf' on error exit pathColin Ian King2018-01-281-1/+3
| | | | | | | | | | | | | Currently there is a memory leak on buf when the call to ntb_mw_get_align fails. Add an exit err label and jump to this so that kfree on buf frees the memory. Detected by CoverityScan, CID#1464286 ("Resource leak") Fixes: d637628ce00c ("NTB: ntb_tool: Add full multi-port NTB API support") Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: ntb_perf: fix printing of resource_size_tArnd Bergmann2018-01-281-2/+2
| | | | | | | | | | | | | | | | On 32-bit architectures, resource_size_t is usually 'unsigned int' or 'unsigned long' but not 'unsigned long long', so we get a warning about printing the wrong data: drivers/ntb/test/ntb_perf.c: In function 'perf_setup_peer_mw': drivers/ntb/test/ntb_perf.c:1390:35: error: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'resource_size_t {aka unsigned int}' [-Werror=format=] This changes the format string to the special %pa that is already used elsewhere in the same file. Fixes: b83003b3fdc1 ("NTB: ntb_perf: Add full multi-port NTB API support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: ntb_hw_idt: Set NTB_TOPO_SWITCH topologySerge Semin2018-01-281-1/+1
| | | | | | | | | | Since Switchtec patch there has been a new topology added to the NTB API. It's called NTB_TOPO_SWITCH and dedicated for PCIe switch chips. Even though topo field isn't used within the IDT driver much, lets set it for the sake of unification. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: ntb_perf: Add full multi-port NTB API supportSerge Semin2018-01-281-601/+1219
| | | | | | | | | | | | | | Former NTB Performance driver could only work with NTB devices, which got Scratchpads available and had just two ports. Since there are devices, which don't have Scratchpads and got more than two peer ports, the performance measuring tool needs to be rewritten. This patch adds the ability to test any available NTB peer. Additionally it allows to set NTB memory windows up using any available data exchange interface: Scratchpad or Message registers. Some cleanups are also added here. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: ntb_tool: Add full multi-port NTB API supportSerge Semin2018-01-281-580/+1240
| | | | | | | | | | | | | | Former NTB Debugging tool driver supported only the limited functionality of the recently updated NTB API, which is now available to work with the truly NTB multi-port devices and devices, which got NTB Message registers instead of Scratchpads. This patch fully rewrites the driver so one would fully expose all the new NTB API interfaces. Particularly it concerns the Message registers, peer ports API, NTB link settings. Additional cleanups are also added here. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: ntb_pp: Add full multi-port NTB API supportSerge Semin2018-01-281-165/+282
| | | | | | | | | | | | | Current Ping Pong driver can't truly work with multi-port devices. Additionally it requires the Scratchpad registers being available on NTB device. This patches rewrites the driver so one would perform the cyclic Ping-Pong algorithm around all the available NTB peers and makes it working with NTB hardware, which doesn't support Scratchpads, but such alternative as NTB Message register. Additional cleanups are also added here. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: Set dma mask and dma coherent mask to NTB devicesSerge Semin2018-01-284-2/+15
| | | | | | | | | | | | | The dma_mask and dma_coherent_mask fields of the NTB struct device weren't initialized in hardware drivers. In fact it should be done instead of PCIe interface usage, since NTB clients are supposed to use NTB API and left unaware of real hardware implementation. In addition to that ntb_device_register() method shouldn't clear the passed ntb_dev structure, since it dma_mask is initialized by hardware drivers. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: Rename NTB messaging API methodsSerge Semin2018-01-281-15/+12
| | | | | | | | | | | There is a common methods signature form used over all the NTB API like functions naming scheme, arguments names and order, etc. Recently added NTB messaging API IO callbacks were named a bit different so should be renamed to be in compliance with the rest of the API. Signed-off-by: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb_hw_switchtec: fix logic errorArnd Bergmann2018-01-281-1/+1
| | | | | | | | | | | | | | | | | Newer gcc (version 7 and 8 presumably) warn about a statement mixing the << operator with logical and: drivers/ntb/hw/mscc/ntb_hw_switchtec.c: In function 'switchtec_ntb_init_sndev': drivers/ntb/hw/mscc/ntb_hw_switchtec.c:888:24: error: '<<' in boolean context, did you mean '<' ? [-Werror=int-in-bool-context] My interpretation here is that the author must have intended a bitmask rather than a comparison, so I'm changing the '&&' to '&', which makes a lot more sense in the context. Fixes: 1b249475275d ("ntb_hw_switchtec: Allow using Switchtec NTB in multi-partition setups") Reviewed-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb_hw_switchtec: Check for alignment of the buffer in mw_set_trans()Logan Gunthorpe2018-01-281-0/+13
| | | | | | | | | | | | | | With Switchtec hardware, the buffer used for a memory window must be aligned to its size (the hardware only replaces the lower bits). In certain circumstances dma_alloc_coherent() will not provide a buffer that adheres to this requirement like when using the CMA and CONFIG_CMA_ALIGNMENT is set lower than the buffer size. When we get an unaligned buffer mw_set_trans() should return an error. We also log an error so we know the cause of the problem. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb_transport: Fix bug with max_mw_size parameterLogan Gunthorpe2018-01-281-0/+3
| | | | | | | | | | | | | | | | | | | | | When using the max_mw_size parameter of ntb_transport to limit the size of the Memory windows, communication cannot be established and the queues freeze. This is because the mw_size that's reported to the peer is correctly limited but the size used locally is not. So the MW is initialized with a buffer smaller than the window but the TX side is using the full window. This means the TX side will be writing to a region of the window that points nowhere. This is easily fixed by applying the same limit to tx_size in ntb_transport_init_queue(). Fixes: e26a5843f7f5 ("NTB: Split ntb_hw_intel and ntb_transport drivers") Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Cc: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb_hw_switchtec: Force down the link before initializingLogan Gunthorpe2018-01-281-7/+50
| | | | | | | | | | | | | | | | | | | | | If one host crashes and soft reboots, the other host may not see a link down event. Then when the crashed host comes back up, the surviving host may not know the link was reset and the NTB clients may not work without being reset. To solve this, we send a LINK_FORCE_DOWN message to each peer every time we come up, before we register the NTB device. If a surviving host still thinks the link is up it will take it down immediately. In this way, once the crashed host comes up fully, it will send a regular link up event as per usual and the link will be properly restarted. While we are in the area, this also fixes the MSG_LINK_UP message that was in the link down function that was reported by Doug Meyers. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reported-by: ThanhTuThai <cruisethai@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb_hw_switchtec: Crosslink doorbells and messagesLogan Gunthorpe2018-01-281-10/+55
| | | | | | | | | | | In a crosslink configuration doorbells and messages largely work the same but the NTB registers must be accessed through the reserved LUT window. Also, as a bonus, seeing there are now two independent sets of NTB links, both partitions can actually use all 60 doorbell registers instead of them having to be split into two for each partition. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb_hw_switchtec: Add initialization code for crosslinkLogan Gunthorpe2018-01-281-5/+197
| | | | | | | | | | | | | | | | | | | | | | | | | | | Crosslink is a feature of the Switchtec switches that is similar to the B2B mode of other NTB devices. It allows a system to be designed that is perfectly symmetric with two identical switches that link two hosts together. In order for the system to be symmetric, there is an empty host-less partition between the two switches which the host must enumerate and assign BAR addresses to. The firmware in the switch manages this specially so that the BAR addresses on both sides of the empty partition will be identical despite being in the same partition with the same address space. The driver determines whether crosslink is enabled by a flag set in the NTB partition info registers which are set by the switch's configuration file. When crosslink is enabled, a reserved LUT window is setup to point to the peer's switch's NTB registers and the local MWs are set to forward to the host-less partition's BARs. (Yes, this hurts my brain too.) Once this is setup, largely the same NTB infrastructure is used to communicate between the two hosts. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb_hw_switchtec: Make switchtec_ntb_init_req_id_table() more generalLogan Gunthorpe2018-01-281-36/+56
| | | | | | | | | | This is a prep patch in order to support the crosslink feature which will require the driver to setup the requester ID table in another partition as well as it's own. To aid this, create a helper function which sets up the requester IDs from an array. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb_hw_switchtec: Create helper function to setup reserved LUT MWsLogan Gunthorpe2018-01-281-29/+43
| | | | | | | | | | | This is a prep patch in order to support the crosslink feature which will require the driver to use another reserved LUT window. To simplify this we move the code which sets up the reserved LUT window into a helper function which will be used by the crosslink initialization. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb_hw_switchtec: Keep track of the number of LUT windows used by the driverLogan Gunthorpe2018-01-281-4/+8
| | | | | | | | | | This is a prep patch in order to support the crosslink feature which will require the driver to use another reserved LUT window. To simplify this, we add some code to track the number of reserved LUT windows in use instead of assuming this is always 1. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb_hw_switchtec: Allow using Switchtec NTB in multi-partition setupsKelvin Cao2018-01-281-9/+48
| | | | | | | | | | | | | | | | | | | | | | | | | Allow using Switchtec NTB in setups that have more than two partitions. Note: this does not enable having multi-host communication, it only allows for a single NTB link between two hosts in a network that might have more than two. Use following logic to determine the NT peer partition: 1) If there are 2 partitions, and the target vector is set in the Switchtec configuration, use the partition specified in target vector. 2) If there are 2 partitions and target vector is unset use the only other partition as specified in the NT EP map. 3) If there are more than 2 partitions and target vector is set use the other partition specified in target vector. 4) If there are more than 2 partitions and target vector is unset, this is invalid and report an error. Signed-off-by: Kelvin Cao <kelvin.cao@microsemi.com> [logang@deltatee.com: commit message fleshed out] Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: switchtec_ntb: Add new line on appropriate printksJon Mason2018-01-281-21/+21
| | | | | | | Trivial addition of "\n" to the dev_* prints where necessary Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: switchtec_ntb: fix spelling mistake: "peforming" -> "performing"Colin Ian King2018-01-281-1/+1
| | | | | | | | Trivial fix to spelling mistake in dev_err error message Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-By: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb: remove Intel Atom NTB driver supportDave Jiang2018-01-282-363/+4
| | | | | | | Removing dead code since this is not being used. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb: remove unneeded DRIVER_LICENSE #definesGreg Kroah-Hartman2018-01-284-8/+4
| | | | | | | | | | | | | | | | | | There is no need to #define the license of the driver, just put it in the MODULE_LICENSE() line directly as a text string. This allows tools that check that the module license matches the source code license to work properly, as there is no need to unwind the unneeded dereference, especially when the string is defined just a few lines above the usage of it. Reported-and-reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Allen Hubbe <Allen.Hubbe@emc.com> Cc: Gary R Hook <gary.hook@amd.com> Cc: Serge Semin <fancer.lancer@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: ntb_hw_switchtec: Fix peer BAR bug in switchtec_ntb_init_shared_mwDoug Meyer2018-01-281-4/+5
| | | | | | | | | | | | | | | | | | | | | | This resolves a bug which may incorrectly configure the peer host's LUT for shared memory window access. The code was using the local host's first BAR number, rather than the peer hosts's first BAR number, to determine what peer NT control register to program. The bug will cause the Switchtec NTB link to work only if both peers have the same first NTB BAR configured. In all other configurations, the link will not come up, failing silently. When both hosts have the same first BAR, the configuration works only because the first BAR numbers happent to be the same. When the hosts do not have the same first BAR, then the LUT translation will not be configured in the correct peer LUT and will not give the peer the shared memory window access required for the link to operate. Signed-off-by: Doug Meyer <dmeyer@gigaio.com> Reviewed-by: Logan Gunthorpe <logang@deltatee.com> Fixes: 678784a44ae8 ("NTB: switchtec_ntb: Initialize hardware for memory windows") Signed-off-by: Jon Mason <jdmason@kudzu.us>
* treewide: setup_timer() -> timer_setup()Kees Cook2017-11-211-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This converts all remaining cases of the old setup_timer() API into using timer_setup(), where the callback argument is the structure already holding the struct timer_list. These should have no behavioral changes, since they just change which pointer is passed into the callback with the same available pointers after conversion. It handles the following examples, in addition to some other variations. Casting from unsigned long: void my_callback(unsigned long data) { struct something *ptr = (struct something *)data; ... } ... setup_timer(&ptr->my_timer, my_callback, ptr); and forced object casts: void my_callback(struct something *ptr) { ... } ... setup_timer(&ptr->my_timer, my_callback, (unsigned long)ptr); become: void my_callback(struct timer_list *t) { struct something *ptr = from_timer(ptr, t, my_timer); ... } ... timer_setup(&ptr->my_timer, my_callback, 0); Direct function assignments: void my_callback(unsigned long data) { struct something *ptr = (struct something *)data; ... } ... ptr->my_timer.function = my_callback; have a temporary cast added, along with converting the args: void my_callback(struct timer_list *t) { struct something *ptr = from_timer(ptr, t, my_timer); ... } ... ptr->my_timer.function = (TIMER_FUNC_TYPE)my_callback; And finally, callbacks without a data assignment: void my_callback(unsigned long data) { ... } ... setup_timer(&ptr->my_timer, my_callback, 0); have their argument renamed to verify they're unused during conversion: void my_callback(struct timer_list *unused) { ... } ... timer_setup(&ptr->my_timer, my_callback, 0); The conversion is done with the following Coccinelle script: spatch --very-quiet --all-includes --include-headers \ -I ./arch/x86/include -I ./arch/x86/include/generated \ -I ./include -I ./arch/x86/include/uapi \ -I ./arch/x86/include/generated/uapi -I ./include/uapi \ -I ./include/generated/uapi --include ./include/linux/kconfig.h \ --dir . \ --cocci-file ~/src/data/timer_setup.cocci @fix_address_of@ expression e; @@ setup_timer( -&(e) +&e , ...) // Update any raw setup_timer() usages that have a NULL callback, but // would otherwise match change_timer_function_usage, since the latter // will update all function assignments done in the face of a NULL // function initialization in setup_timer(). @change_timer_function_usage_NULL@ expression _E; identifier _timer; type _cast_data; @@ ( -setup_timer(&_E->_timer, NULL, _E); +timer_setup(&_E->_timer, NULL, 0); | -setup_timer(&_E->_timer, NULL, (_cast_data)_E); +timer_setup(&_E->_timer, NULL, 0); | -setup_timer(&_E._timer, NULL, &_E); +timer_setup(&_E._timer, NULL, 0); | -setup_timer(&_E._timer, NULL, (_cast_data)&_E); +timer_setup(&_E._timer, NULL, 0); ) @change_timer_function_usage@ expression _E; identifier _timer; struct timer_list _stl; identifier _callback; type _cast_func, _cast_data; @@ ( -setup_timer(&_E->_timer, _callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, &_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, &_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)&_callback, _E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, (_cast_func)&_callback, (_cast_data)_E); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E._timer, _callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, &_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, &_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)_E); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)&_E); +timer_setup(&_E._timer, _callback, 0); | _E->_timer@_stl.function = _callback; | _E->_timer@_stl.function = &_callback; | _E->_timer@_stl.function = (_cast_func)_callback; | _E->_timer@_stl.function = (_cast_func)&_callback; | _E._timer@_stl.function = _callback; | _E._timer@_stl.function = &_callback; | _E._timer@_stl.function = (_cast_func)_callback; | _E._timer@_stl.function = (_cast_func)&_callback; ) // callback(unsigned long arg) @change_callback_handle_cast depends on change_timer_function_usage@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _origtype; identifier _origarg; type _handletype; identifier _handle; @@ void _callback( -_origtype _origarg +struct timer_list *t ) { ( ... when != _origarg _handletype *_handle = -(_handletype *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle = -(void *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle; ... when != _handle _handle = -(_handletype *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg | ... when != _origarg _handletype *_handle; ... when != _handle _handle = -(void *)_origarg; +from_timer(_handle, t, _timer); ... when != _origarg ) } // callback(unsigned long arg) without existing variable @change_callback_handle_cast_no_arg depends on change_timer_function_usage && !change_callback_handle_cast@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _origtype; identifier _origarg; type _handletype; @@ void _callback( -_origtype _origarg +struct timer_list *t ) { + _handletype *_origarg = from_timer(_origarg, t, _timer); + ... when != _origarg - (_handletype *)_origarg + _origarg ... when != _origarg } // Avoid already converted callbacks. @match_callback_converted depends on change_timer_function_usage && !change_callback_handle_cast && !change_callback_handle_cast_no_arg@ identifier change_timer_function_usage._callback; identifier t; @@ void _callback(struct timer_list *t) { ... } // callback(struct something *handle) @change_callback_handle_arg depends on change_timer_function_usage && !match_callback_converted && !change_callback_handle_cast && !change_callback_handle_cast_no_arg@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _handletype; identifier _handle; @@ void _callback( -_handletype *_handle +struct timer_list *t ) { + _handletype *_handle = from_timer(_handle, t, _timer); ... } // If change_callback_handle_arg ran on an empty function, remove // the added handler. @unchange_callback_handle_arg depends on change_timer_function_usage && change_callback_handle_arg@ identifier change_timer_function_usage._callback; identifier change_timer_function_usage._timer; type _handletype; identifier _handle; identifier t; @@ void _callback(struct timer_list *t) { - _handletype *_handle = from_timer(_handle, t, _timer); } // We only want to refactor the setup_timer() data argument if we've found // the matching callback. This undoes changes in change_timer_function_usage. @unchange_timer_function_usage depends on change_timer_function_usage && !change_callback_handle_cast && !change_callback_handle_cast_no_arg && !change_callback_handle_arg@ expression change_timer_function_usage._E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type change_timer_function_usage._cast_data; @@ ( -timer_setup(&_E->_timer, _callback, 0); +setup_timer(&_E->_timer, _callback, (_cast_data)_E); | -timer_setup(&_E._timer, _callback, 0); +setup_timer(&_E._timer, _callback, (_cast_data)&_E); ) // If we fixed a callback from a .function assignment, fix the // assignment cast now. @change_timer_function_assignment depends on change_timer_function_usage && (change_callback_handle_cast || change_callback_handle_cast_no_arg || change_callback_handle_arg)@ expression change_timer_function_usage._E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type _cast_func; typedef TIMER_FUNC_TYPE; @@ ( _E->_timer.function = -_callback +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -&_callback +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -(_cast_func)_callback; +(TIMER_FUNC_TYPE)_callback ; | _E->_timer.function = -(_cast_func)&_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -&_callback; +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -(_cast_func)_callback +(TIMER_FUNC_TYPE)_callback ; | _E._timer.function = -(_cast_func)&_callback +(TIMER_FUNC_TYPE)_callback ; ) // Sometimes timer functions are called directly. Replace matched args. @change_timer_function_calls depends on change_timer_function_usage && (change_callback_handle_cast || change_callback_handle_cast_no_arg || change_callback_handle_arg)@ expression _E; identifier change_timer_function_usage._timer; identifier change_timer_function_usage._callback; type _cast_data; @@ _callback( ( -(_cast_data)_E +&_E->_timer | -(_cast_data)&_E +&_E._timer | -_E +&_E->_timer ) ) // If a timer has been configured without a data argument, it can be // converted without regard to the callback argument, since it is unused. @match_timer_function_unused_data@ expression _E; identifier _timer; identifier _callback; @@ ( -setup_timer(&_E->_timer, _callback, 0); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, 0L); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E->_timer, _callback, 0UL); +timer_setup(&_E->_timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0L); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_E._timer, _callback, 0UL); +timer_setup(&_E._timer, _callback, 0); | -setup_timer(&_timer, _callback, 0); +timer_setup(&_timer, _callback, 0); | -setup_timer(&_timer, _callback, 0L); +timer_setup(&_timer, _callback, 0); | -setup_timer(&_timer, _callback, 0UL); +timer_setup(&_timer, _callback, 0); | -setup_timer(_timer, _callback, 0); +timer_setup(_timer, _callback, 0); | -setup_timer(_timer, _callback, 0L); +timer_setup(_timer, _callback, 0); | -setup_timer(_timer, _callback, 0UL); +timer_setup(_timer, _callback, 0); ) @change_callback_unused_data depends on match_timer_function_unused_data@ identifier match_timer_function_unused_data._callback; type _origtype; identifier _origarg; @@ void _callback( -_origtype _origarg +struct timer_list *unused ) { ... when != _origarg } Signed-off-by: Kees Cook <keescook@chromium.org>
* ntb: intel: remove b2b memory window workaround for Skylake NTBDave Jiang2017-11-181-73/+2
| | | | | | | | The workaround code is never used because Skylake NTB does not need it. Reported-by: Allen Hubbe <allen.hubbe@dell.com> Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: make idt_89hpes_cfg constBhumika Goyal2017-11-181-8/+8
| | | | | | | | Make these const as they are only used during a copy operation. Done using Coccinelle. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: switchtec_ntb: Add memory window supportLogan Gunthorpe2017-11-181-3/+210
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The Switchtec hardware has two types of memory windows: LUTs and Direct. The first area in each BAR is for LUT windows and the remaining area is for the direct region. The total number of LUT entries is set by a configuration setting in hardware and they all must be the same size. (This is fixed by switchtec_ntb to be 64K.) switchtec_ntb enables the LUTs only for the first BAR and enables the highest power of two possible. Seeing the LUTs are at the beginning of the BAR, the direct memory window's alignment is affected. Therefore, the maximum direct memory window size can not be greater than the number of LUTs times 64K. The direct window in other BARs will not have this restriction as the LUTs will not be enabled there. LUTs will only be exposed through the NTB API if the use_lut_mw parameter is set. Seeing the Switchtec hardware, by default, configures BARs to be 4G a module parameter is given to limit the size of the advertised memory windows. Higher layers tend to allocate the maximum BAR size and this has a tendency to fail when they try to allocate 4GB of contiguous memory. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Stephen Bates <sbates@raithlin.com> Reviewed-by: Kurt Schwemmer <kurt.schwemmer@microsemi.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: switchtec_ntb: Implement scratchpad registersLogan Gunthorpe2017-11-181-2/+73
| | | | | | | | | | | | Seeing there is no dedicated hardware for this, we simply add these as entries in the shared memory window. Thus, we could support any number of them but 128 seems like enough, for now. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Stephen Bates <sbates@raithlin.com> Reviewed-by: Kurt Schwemmer <kurt.schwemmer@microsemi.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: switchtec_ntb: Implement doorbell registersLogan Gunthorpe2017-11-181-4/+85
| | | | | | | | | | | | | | Pretty straightforward implementation of doorbell registers. The shift and mask were setup in an earlier patch and this just hooks up the appropriate portion of the IDB register as the local doorbells and the opposite portion of ODB as the peer doorbells. The DB mask is protected by a spinlock to avoid concurrent read-modify-write accesses. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Stephen Bates <sbates@raithlin.com> Reviewed-by: Kurt Schwemmer <kurt.schwemmer@microsemi.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: switchtec_ntb: Add link managementLogan Gunthorpe2017-11-181-1/+129
| | | | | | | | | | | | | | | | | | | | | switchtec_ntb checks for a link by looking at the shared memory window. If the magic number is correct and the other side indicates their link is enabled then we take the link to be up. Whenever we change our local link status we send a msg to the other side to check whether it's up and change their status. The current status is maintained in a flag so ntb_is_link_up can return quickly. We utilize Switchtec's link status notifier to also check link changes when the switch notices a port changes state. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Stephen Bates <sbates@raithlin.com> Reviewed-by: Kurt Schwemmer <kurt.schwemmer@microsemi.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: switchtec_ntb: Add skeleton NTB driverLogan Gunthorpe2017-11-181-1/+147
| | | | | | | | | | Add a skeleton NTB driver which will be filled out in subsequent patches. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Stephen Bates <sbates@raithlin.com> Reviewed-by: Kurt Schwemmer <kurt.schwemmer@microsemi.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: switchtec_ntb: Initialize hardware for doorbells and messagesLogan Gunthorpe2017-11-181-0/+142
| | | | | | | | | | | | | | | | Set up some hardware registers and creates interrupt service routines for the doorbells and messages. There are 64 doorbells in the switch that are shared between all partitions. The upper 4 doorbells are also shared with the messages and are therefore not used. Thus, this provides 28 doorbells for each partition. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Stephen Bates <sbates@raithlin.com> Reviewed-by: Kurt Schwemmer <kurt.schwemmer@microsemi.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: switchtec_ntb: Initialize hardware for memory windowsLogan Gunthorpe2017-11-181-0/+360
| | | | | | | | | | | | | | | | | | | | | Add the code to initialize the memory windows in the hardware. This includes setting up the requester ID table, and figuring out which BAR corresponds to which memory window. (Seeing the switch can be configured with any number of BARs.) Also, seeing the device doesn't have hardware for scratchpads or determining the link status, we create a shared memory window that has these features. A magic number with a version component will be used to determine if the other side's driver is actually up. The shared memory window also informs the other side of the size and count of the local memory windows. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Stephen Bates <sbates@raithlin.com> Reviewed-by: Kurt Schwemmer <kurt.schwemmer@microsemi.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: switchtec_ntb: Introduce initial NTB driverLogan Gunthorpe2017-11-185-0/+93
| | | | | | | | | | | | | | Seeing the Switchtec NTB hardware shares the same endpoint as the management endpoint we utilize the class_interface API to register an NTB driver for every Switchtec device in the system that has the NTB class code. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Stephen Bates <sbates@raithlin.com> Reviewed-by: Kurt Schwemmer <kurt.schwemmer@microsemi.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* NTB: Ensure ntb_mw_get_align() is only called when the link is upLogan Gunthorpe2017-11-183-22/+22
| | | | | | | | | | | | | | | | | | With Switchtec hardware it's impossible to get the alignment parameters for a peer's memory window until the peer's driver has configured its windows. Strictly speaking, the link doesn't have to be up for this, but the link being up is the only way the client can tell that the other side has been configured. This patch converts ntb_transport and ntb_perf to use this function after the link goes up. This simplifies these clients slightly because they no longer have to store the alignment parameters. It also tweaks ntb_tool so that peer_mw_trans will print zero if it is run before the link goes up. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb: transport shouldn't disable link due to bogus values in SPADsDave Jiang2017-08-011-3/+1
| | | | | | | | | | | | | | It seems that under certain scenarios the SPAD can have bogus values caused by an agent (i.e. BIOS or other software) that is not the kernel driver, and that causes memory window setup failure. This should not cause the link to be disabled because if we do that, the driver will never recover again. We have verified in testing that this issue happens and prevents proper link recovery. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> Fixes: 84f766855f61 ("ntb: stop link work when we do not have memory")
* ntb: use correct mw_count function in ntb_tool and ntb_transportLogan Gunthorpe2017-07-172-2/+2
| | | | | | | | | | | | | | | After converting to the new API, both ntb_tool and ntb_transport are using ntb_mw_count to iterate through ntb_peer_get_addr when they should be using ntb_peer_mw_count. This probably isn't an issue with the Intel and AMD drivers but this will matter for any future driver with asymetric memory window counts. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Allen Hubbe <Allen.Hubbe@emc.com> Signed-off-by: Jon Mason <jdmason@kudzu.us> Fixes: 443b9a14ecbe ("NTB: Alter MW API to support multi-ports devices")
* ntb: Add error path/handling to Debug FS entry creationGary R Hook2017-07-061-7/+13
| | | | | | | | | If a failure occurs when creating Debug FS entries, unroll all of the work that's been done. Signed-off-by: Gary R Hook <gary.hook@amd.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb: Add more debugfs support for ntb_perf testing optionsGary R Hook2017-07-061-0/+28
| | | | | | | | | | | | | | | | | | | The ntb_perf tool uses module parameters to control the characteristics of its test. Enable the changing of these options through debugfs, and eliminating the need to unload and reload the module to make changes and run additional tests. Add a new module parameter that forces the DMA channel selection onto the same node as the NTB device (default: true). - seg_order: Size of the NTB memory window; power of 2. - run_order: Size of the data buffer; power of 2. - use_dma: Use DMA or memcpy? Default: 0. - on_node: Only use DMA channel(s) on the NTB node. Default: true. Signed-off-by: Gary R Hook <gary.hook@amd.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* ntb: Remove debug-fs variables from the context structureGary R Hook2017-07-061-14/+14
| | | | | | | | | The Debug FS entries manage themselves; we don't need to hang onto them in the context structure. Signed-off-by: Gary R Hook <gary.hook@amd.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
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