- 21 7月, 2007 3 次提交
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由 Masato Noguchi 提交于
The following steps are not needed in the SPE context save/restore paths: Save Step 12: save_mfc_decr() save suspend_time to CSA (It will be done by step 14) save ch 7 (decrementer value will be saved in LSCSA by spe-side step 10) Restore Step 59: restore_ch_part1() restore ch 1 (it will be done by spe-side step 15) This change removes the unnecessary steps. Signed-off-by: NMasato Noguchi <Masato.Noguchi@jp.sony.com> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
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由 Jeremy Kerr 提交于
Based on a fix from Masato Noguchi <Masato.Noguchi@jp.sony.com>. Remove the (incorrect) array size declarations in the spufs channel arrays, and use ARRAY_SIZE rather than hardcoded values. Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
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由 Kazunori Asayama 提交于
The current SPU context saving procedure in SPUFS unexpectedly restarts MFC when halting decrementer, because MFC_CNTL[Dh] is set without MFC_CNTL[Sm]. This bug causes, for example, saving broken DMA queues. Here is a patch to fix the problem. Signed-off-by: NKazunori Asayama <asayama@sm.sony.co.jp> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
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- 03 7月, 2007 2 次提交
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由 Kazunori Asayama 提交于
The function backing_ops->read_mfc_tagstatus() doesn't return a correct value because the dma_tagstatus_R register isn't saved in CSA. This fixes the problem. Signed-off-by: NKazunori Asayama <asayama@sm.sony.co.jp> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Jeremy Kerr 提交于
Remove redundant whitespace in arch/powerpc/platforms/cell/spufs/ Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 09 5月, 2007 2 次提交
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由 Benjamin Herrenschmidt 提交于
This adds an option to spufs when the kernel is configured for 4K page to give it the ability to use 64K pages for SPE local store mappings. Currently, we are optimistic and try order 4 allocations when creating contexts. If that fails, the code will fallback to 4K automatically. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Randy Dunlap 提交于
Remove includes of <linux/smp_lock.h> where it is not used/needed. Suggested by Al Viro. Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc, sparc64, and arm (all 59 defconfigs). Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 24 4月, 2007 1 次提交
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由 Arnd Bergmann 提交于
Until now, we have always entered the spu page fault handler with a mutex for the spu context held. This has multiple bad side-effects: - it becomes impossible to suspend the context during page faults - if an spu program attempts to access its own mmio areas through DMA, we get an immediate livelock when the nopage function tries to acquire the same mutex This patch makes the page fault logic operate on a struct spu_context instead of a struct spu, and moves it from spu_base.c to a new file fault.c inside of spufs. We now also need to copy the dar and dsisr contents of the last fault into the saved context to have it accessible in case we schedule out the context before activating the page fault handler. Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
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- 10 3月, 2007 1 次提交
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由 Benjamin Herrenschmidt 提交于
The SPU code doesn't properly invalidate SPUs SLBs when necessary, for example when changing a segment size from the hugetlbfs code. In addition, it saves and restores the SLB content on context switches which makes it harder to properly handle those invalidations. This patch removes the saving & restoring for now, something more efficient might be found later on. It also adds a spu_flush_all_slbs(mm) that can be used by the core mm code to flush the SLBs of all SPEs that are running a given mm at the time of the flush. In order to do that, it adds a spinlock to the list of all SPEs and move some bits & pieces from spufs to spu_base.c Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 25 10月, 2006 3 次提交
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由 arnd@arndb.de 提交于
Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Mark Nutter 提交于
This adds two new flags to spu_create: SPU_CREATE_NONSCHED: create a context that is never moved away from an SPE once it has started running. This flag can only be used by tasks with the CAP_SYS_NICE capability. SPU_CREATE_ISOLATED: create a nonschedulable context that enters isolation mode upon first run. This requires the SPU_CREATE_NONSCHED flag. Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Masato Noguchi 提交于
SPRN_SDR1 and the SPE's MFC SDR are hypervisor resources and are not accessible from a logical partition. This change adds an access wrapper. When running on bare H/W, the spufs needs to only set the SPE's MFC SDR to the value of the PPE's SPRN_SDR1 once at SPE initialization, so this change renames mfc_sdr_set() to mfc_sdr_setup() and moves the access of SPRN_SDR1 into the mmio wrapper. It also removes the now unneeded member mfc_sdr_RW from struct spu_priv1_collapsed. Signed-off-by: NMasato Noguchi <Masato.Noguchi@jp.sony.com> Signed-off-by: NGeoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> -- Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 05 10月, 2006 1 次提交
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由 HyeonSeung Jang 提交于
For better explanation, I break down the page fault handling into steps: 1) There is a page fault caused by DMA operation initiated by SPU and DMA is suspended. 2) The interrupt handler 'spu_irq_class_1()/__spu_trap_data_map()' is called and it just wakes up the sleeping spe-manager thread. 3) by PPE scheduler, the corresponding bottom half, spu_irq_class_1_bottom() is called in process context and DMA is restarted. There can be a quite large time gap between 2) and 3) and I found the following problem: Between 2) and 3) If the context becomes unbound, 3) is not executed because when the spe-manager thread is awaken, the context is already saved. (This situation can happen, for example, when a high priority spe thread newly started in that time gap) But the actual problem is that the corresponding SPU context does not work even if it is bound again to a SPU. Besides I can see the following warning in mambo simulator when the context becomes unbound(in save_mfc_cmd()), i.e. when unbind() is called for the context after step 2) before 3) : 'WARNING: 61392752237: SPE2: MFC_CMD_QUEUE channel count of 15 is inconsistent with number of available DMA queue entries of 16' After I go through available documents, I found that the problem is because the suspended DMA is not restarted when it is bound again. Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 01 7月, 2006 1 次提交
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由 Jörn Engel 提交于
Signed-off-by: NJörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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- 28 6月, 2006 2 次提交
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由 Benjamin Herrenschmidt 提交于
In the context save/restore code, the SPU MFC command queue purge code has a bug: static inline void wait_purge_complete(struct spu_state *csa, struct spu *spu) { struct spu_priv2 __iomem *priv2 = spu->priv2; /* Save, Step 28: * Poll MFC_CNTL[Ps] until value '11' is * read * (purge complete). */ POLL_WHILE_FALSE(in_be64(&priv2->mfc_control_RW) & MFC_CNTL_PURGE_DMA_COMPLETE); } This will exit as soon as _one_ of the 2 bits that compose MFC_CNTL_PURGE_DMA_COMPLETE is set, and one of them happens to be "purge in progress"... which means that we'll happily continue restoring the MFC while it's being purged at the same time. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Ingo Molnar 提交于
locking init cleanups: - convert " = SPIN_LOCK_UNLOCKED" to spin_lock_init() or DEFINE_SPINLOCK() - convert rwlocks in a similar manner this patch was generated automatically. Motivation: - cleanliness - lockdep needs control of lock initialization, which the open-coded variants do not give - it's also useful for -rt and for lock debugging in general Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NArjan van de Ven <arjan@linux.intel.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 27 6月, 2006 1 次提交
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由 Andreas Mohr 提交于
acquired (aquired) contiguous (contigious) successful (succesful, succesfull) surprise (suprise) whether (weather) some other misspellings Signed-off-by: NAndreas Mohr <andi@lisas.de> Signed-off-by: NAdrian Bunk <bunk@stusta.de>
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- 21 6月, 2006 6 次提交
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由 Masato Noguchi 提交于
This patch remove 'stop_code' -- discarded member of struct spu. It is written at initialize and interrupt, but never read in current implementation. Signed-off-by: NMasato Noguchi <Masato.Noguchi@jp.sony.com> Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Geoff Levand 提交于
To support muti-platform binaries the spu hypervisor accessor routines must have runtime binding. I removed the existing statically linked routines in spu.h and spu_priv1_mmio.c and created new accessor routines in spu_priv1.h that operate indirectly through an ops struct spu_priv1_ops. spu_priv1_mmio.c contains the instance of the accessor routines for running on raw hardware. Signed-off-by: NGeoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 arnd@arndb.de 提交于
The save/restore sequence for SPE contexts currently attempts to save and restore the channel count for SPE channel 1 (the SPU_WriteEventMask channel. But the CBE architecture (section 9.11.2) clearly states that this channel does not have an associated count. Hardware simply ignores the attempt to write this count, but the simulator generates a warning message. WARNING: 279721590: SPE7: Attempt to write channel count for CH 1 with no associated count is ignored. Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 arnd@arndb.de 提交于
The wbox channel count of an spu is now initialized to four for the saved context. This makes it possible to write to the mailbox right away without waiting for the SPE to become scheduled first. Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 arnd@arndb.de 提交于
spufs currently knows only 4k pages and 16M hugetlb pages. Make it use the regular methods for deciding on the SLB bits. Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 arnd@arndb.de 提交于
The spu_base module is rather deeply intermixed with the core kernel, so it makes sense to have that built-in. This will let us extend the base in the future without having to export more core symbols just for it. Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 14 4月, 2006 1 次提交
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由 Jordi Caubet 提交于
We found that when the 'decrementer' is saved, the PPE saves the current time 'csa->suspend_time'. When restoring the 'decrementer', (Step 34) decrementer seems to be adjusted with the number of cycles th= at a spu thread has not been running. In that code it is missing a substract ('-') because 'delta_time' is assigned a not substracted(see bellow). Acked-by: NMark Nutter <mnutter@us.ibm.com> Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 27 3月, 2006 1 次提交
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由 Arnd Bergmann 提交于
This patch adds a new file called 'mfc' to each spufs directory. The file accepts DMA commands that are a subset of what would be legal DMA commands for problem state register access. Upon reading the file, a bitmask is returned with the completed tag groups set. The file is meant to be used from an abstraction in libspe that is added by a different patch. From the kernel perspective, this means a process can now offload a memory copy from or into an SPE local store without having to run code on the SPE itself. The transfer will only be performed while the SPE is owned by one thread that is waiting in the spu_run system call and the data will be transferred into that thread's address space, independent of which thread started the transfer. Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 11 1月, 2006 1 次提交
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由 Geoff Levand 提交于
The SPE Book IV indicates that MFC DMA operations must be suspended and restored on SPU context switch (in Step 8). This patch adds that operation, which is missing from the current spufs implementation. Signed-off-by: NMasato Noguchi <Masato.Noguchi@jp.sony.com> Signed-off-by: NGeoff Levand <geoffrey.levand@am.sony.com> Acked-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 09 1月, 2006 6 次提交
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由 Arnd Bergmann 提交于
In a hypervisor based setup, direct access to the first priviledged register space can typically not be allowed to the kernel and has to be implemented through hypervisor calls. As suggested by Masato Noguchi, let's abstract the register access trough a number of function calls. Since there is currently no public specification of actual hypervisor calls to implement this, I only provide a place that makes it easier to hook into. Cc: Masato Noguchi <Masato.Noguchi@jp.sony.com> Cc: Geoff Levand <geoff.levand@am.sony.com> Signed-off-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Arnd Bergmann 提交于
checking bits manually might not be synchonized with the use of set_bit/clear_bit. Make sure we always use the correct bitops by removing the unnecessary identifiers. Signed-off-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Arnd Bergmann 提交于
Handling mailbox interrupts was broken in multiple respects, the combination of which was hiding the bugs most of the time. - The ibox interrupt mask was open initially even though there are no waiters on a newly created SPU. - Acknowledging the mailbox interrupt did not work because it is level triggered and the mailbox data is never retrieved from inside the interrupt handler. - The interrupt handler delivered interrupts with a disabled mask if another interrupt is triggered for the same class but a different mask. - The poll function did not enable the interrupt if it had not been enabled, so we might run into the poll timeout if none of the other bugs saved us and no signal was delivered. We probably still have a similar problem with blocking read/write on mailbox files, but that will result in extra wakeup in the worst case, not in incorrect behaviour. Signed-off-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Arnd Bergmann 提交于
This adds a scheduler for SPUs to make it possible to use more logical SPUs than physical ones are present in the system. Currently, there is no support for preempting a running SPU thread, they have to leave the SPU by either triggering an event on the SPU that causes it to return to the owning thread or by sending a signal to it. This patch also adds operations that enable accessing an SPU in either runnable or saved state. We use an RW semaphore to protect the state of the SPU from changing underneath us, while we are holding it readable. In order to change the state, it is acquired writeable and a context save or restore is executed before downgrading the semaphore to read-only. From: Mark Nutter <mnutter@us.ibm.com>, Uli Weigand <Ulrich.Weigand@de.ibm.com> Signed-off-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Mark Nutter 提交于
This adds the code needed to perform a context switch from spufs, following the recommended 76-step sequence. Signed-off-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Mark Nutter 提交于
Add some infrastructure for saving and restoring the context of an SPE. This patch creates a new structure that can hold the whole state of a physical SPE in memory. It also contains code that avoids races during the context switch and the binary code that is loaded to the SPU in order to access its registers. The actual PPE- and SPE-side context switch code are two separate patches. Signed-off-by: NArnd Bergmann <arndb@de.ibm.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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