- 18 Aug, 2017 40 commits
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Bart Van Assche authored
This will make it easier to convert this driver to the blk-mq approach. This patch also reduces interrupt latency by moving skd_request_fn() calls out of the skd_isr() interrupt. Signed-off-by:
Bart Van Assche <bart.vanassche@wdc.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
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Bart Van Assche authored
Move the skd_fail_all_pending() call out of skd_request_fn_not_online() such that this function can be reused in the blk-mq code path. Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality but makes the next patch in this series easier to read. Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality. Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality. Signed-off-by:
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Bart Van Assche authored
mem_map[i] is accessed through readl() / writel() hence declaring mem_map as volatile is not necessary. Remove the volatile declarations from struct fit_completion_entry_v1 pointers and struct fit_comp_error_info since reading these structures multiple times is safe. Signed-off-by:
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Bart Van Assche authored
Since setup_timer() invokes init_timer(), invoking init_timer() just before setup_timer() is redundant. Hence remove the init_timer() call. Signed-off-by:
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Bart Van Assche authored
This change makes skd_preop_sg_list() support chained sg-lists. Signed-off-by:
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Bart Van Assche authored
Since all callers pass zero as second argument to skd_recover_requests(), drop that second argument. Signed-off-by:
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Bart Van Assche authored
The value of skcmp, cmp_cntxt etc. is overwritten during every loop iteration and is not used after the loop has finished. Hence initializing these variables outside the loop is not necessary. This patch does not change any functionality. Signed-off-by:
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Bart Van Assche authored
Use DMA_FROM_DEVICE and DMA_TO_DEVICE directly instead of introducing driver-private constants with the same numerical value. Signed-off-by:
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Bart Van Assche authored
Use ARRAY_SIZE() instead of open-coding it. This patch does not change any functionality. Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality. Signed-off-by:
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Bart Van Assche authored
Since needless use of __packed slows down access to data structures, only use __packed when needed. Signed-off-by:
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Bart Van Assche authored
This patch will help to verify the changes made by the next patch. Signed-off-by:
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Bart Van Assche authored
This change makes the source code easier to read. Signed-off-by:
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Bart Van Assche authored
dma_alloc_coherent() guarantees alignment on a page boundary so no explicit alignment is needed to align on a 64 byte boundary. Signed-off-by:
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Bart Van Assche authored
Due to the previous patch it is guaranteed that the FIT msg contains at least one request after the for-loop has finished. Use this to simplify the code. Signed-off-by:
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Bart Van Assche authored
Prepare the S/G-list before allocating a FIT msg such that the FIT msg always contains at least one request after the for-loop is finished. Signed-off-by:
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Bart Van Assche authored
Pass the correct size to pci_free_consistent() in skd_free_skcomp(). Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality. Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality. Signed-off-by:
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Bart Van Assche authored
Signed-off-by:
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Bart Van Assche authored
Ensure that sparse does not report any warnings when building the skd driver with sparse verification enabled (C=1 or C=2). Signed-off-by:
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Bart Van Assche authored
Use dev_err() and dev_info() instead of pr_err() and pr_info(). Since dev_dbg() is able to report file name and line number information, remove __FILE__ and __LINE__ from the dev_dbg() calls. Remove the struct skd_device members and the function (skd_name()) that became superfluous due to these changes. This patch removes the device name and serial number from log statements. An example of the old log line format: (skd0:STM000196603:[0000:00:09.0]): Driver state STARTING(3)=>ONLINE(4) An example of the new log line format: skd:0000:00:09.0: Driver state STARTING(3)=>ONLINE(4) Signed-off-by:
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Bart Van Assche authored
The purpose of barrier() is to prevent reordering by the compiler. Since the compiler does not reorder calls to non-pure functions, remove the barrier() calls from skd_reg_{read,write}{32,64}(). Since pr_debug() is able to report file name and line number information, remove __FILE__ and __LINE__ from the pr_debug() calls. Signed-off-by: -
Bart Van Assche authored
This patch does not change any functionality. Signed-off-by:
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Bart Van Assche authored
These variables have been detected by building with W=1. Declare 'acc' as __maybe_unused because most access_ok() implementations ignore their first argument. This patch does not change any functionality. Signed-off-by:
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Bart Van Assche authored
There is no function skd_completion_posted_isr() in the skd driver but there is a function called skd_isr_completion_posted(). Fix the function name in the comment. Signed-off-by:
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Bart Van Assche authored
Change "ptimal" into "optimal" and remove the misleading reference to sysfs. Signed-off-by:
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Bart Van Assche authored
Signed-off-by:
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Bart Van Assche authored
This patch does not change any functionality but makes the skd driver source code more uniform with that of other kernel drivers. Signed-off-by:
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Bart Van Assche authored
Since the code guarded by #ifdef SKD_VMK_POLL_HANDLER / #endif is never built on Linux systems, remove it. Signed-off-by:
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Bart Van Assche authored
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Bart Van Assche authored
E-mails sent to support@stec-inc.com bounce. Hence remove that e-mail address from the driver. Add an entry to the MAINTAINERS file instead. Signed-off-by:
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Bart Van Assche authored
This change does not affect any skd driver version derived from a dual licensed code base but makes all code derived from future upstream skd driver versions GPLv2 only. Signed-off-by:
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Bart Van Assche authored
Ensure that the members of struct skd_msg_buf have been transferred to the PCIe adapter before the doorbell is triggered. This patch avoids that I/O fails sporadically and that the following error message is reported: (skd0:STM000196603:[0000:00:09.0]): Completion mismatch comp_id=0x0000 skreq=0x0400 new=0x0000 Signed-off-by:
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Bart Van Assche authored
Since put_disk() triggers a disk_release() call and since that last function calls blk_put_queue() if disk->queue != NULL, clear the disk->queue pointer before calling put_disk(). This avoids that unloading the skd kernel module triggers the following use-after-free: WARNING: CPU: 8 PID: 297 at lib/refcount.c:128 refcount_sub_and_test+0x70/0x80 refcount_t: underflow; use-after-free. CPU: 8 PID: 297 Comm: kworker/8:1 Not tainted 4.11.10-300.fc26.x86_64 #1 Workqueue: events work_for_cpu_fn Call Trace: dump_stack+0x63/0x84 __warn+0xcb/0xf0 warn_slowpath_fmt+0x5a/0x80 refcount_sub_and_test+0x70/0x80 refcount_dec_and_test+0x11/0x20 kobject_put+0x1f/0x50 blk_put_queue+0x15/0x20 disk_release+0xae/0xf0 device_release+0x32/0x90 kobject_release+0x67/0x170 kobject_put+0x2b/0x50 put_disk+0x17/0x20 skd_destruct+0x5c/0x890 [skd] skd_pci_probe+0x124d/0x13a0 [skd] local_pci_probe+0x42/0xa0 work_for_cpu_fn+0x14/0x20 process_one_work+0x19e/0x470 worker_thread+0x1dc/0x4a0 kthread+0x125/0x140 ret_from_fork+0x25/0x30 Signed-off-by:
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Bart Van Assche authored
Calling blk_start_queue() from interrupt context with the queue lock held and without disabling IRQs, as the skd driver does, is safe. This patch avoids that loading the skd driver triggers the following warning: WARNING: CPU: 11 PID: 1348 at block/blk-core.c:283 blk_start_queue+0x84/0xa0 RIP: 0010:blk_start_queue+0x84/0xa0 Call Trace: skd_unquiesce_dev+0x12a/0x1d0 [skd] skd_complete_internal+0x1e7/0x5a0 [skd] skd_complete_other+0xc2/0xd0 [skd] skd_isr_completion_posted.isra.30+0x2a5/0x470 [skd] skd_isr+0x14f/0x180 [skd] irq_forced_thread_fn+0x2a/0x70 irq_thread+0x144/0x1a0 kthread+0x125/0x140 ret_from_fork+0x2a/0x40 Fixes: commit a038e253 ("[PATCH] blk_start_queue() must be called with irq disabled - add warning") Signed-off-by:
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Bart Van Assche authored
Signed-off-by:
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