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2022-01-18hw/dma: Let dma_buf_read() / dma_buf_write() propagate MemTxResultPhilippe Mathieu-Daudé
Since commit 292e13142d2, dma_buf_rw() returns a MemTxResult type. Do not discard it, return it to the caller. Pass the previously returned value (the QEMUSGList residual size, which was rarely used) as an optional argument. With this new API, SCSIRequest::residual might now be accessed via a pointer. Since the size_t type does not have the same size on 32 and 64-bit host architectures, convert it to a uint64_t, which is big enough to hold the residual size, and the type is constant on both 32/64-bit hosts. Update the few dma_buf_read() / dma_buf_write() callers to the new API. Reviewed-by: Klaus Jensen <k.jensen@samsung.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Acked-by: Peter Xu <peterx@redhat.com> Message-Id: <20220117125130.131828-1-f4bug@amsat.org>
2022-01-18hw/dma: Use dma_addr_t type definition when relevantPhilippe Mathieu-Daudé
Update the obvious places where dma_addr_t should be used (instead of uint64_t, hwaddr, size_t, int32_t types). This allows to have &dma_addr_t type portable on 32/64-bit hosts. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20220111184309.28637-11-f4bug@amsat.org>
2022-01-18hw/dma: Move ScatterGatherEntry / QEMUSGList declarations aroundPhilippe Mathieu-Daudé
In the next commit we will use the dma_addr_t type in the QEMUSGList structure. Since currently dma_addr_t is defined after QEMUSGList, move the declarations to have dma_addr_t defined first. This is a pure code-movement patch. Suggested-by: David Hildenbrand <david@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20220111184309.28637-10-f4bug@amsat.org>
2022-01-18hw/dma: Remove CONFIG_USER_ONLY checkPhilippe Mathieu-Daudé
DMA API should not be included in user-mode emulation. If so, build should fail. Remove the CONFIG_USER_ONLY check. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: David Hildenbrand <david@redhat.com> Message-Id: <20220111184309.28637-6-f4bug@amsat.org> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2021-12-31dma: Let ld*_dma() propagate MemTxResultPhilippe Mathieu-Daudé
dma_memory_read() returns a MemTxResult type. Do not discard it, return it to the caller. Update the few callers. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20211223115554.3155328-19-philmd@redhat.com>
2021-12-31dma: Let st*_dma() propagate MemTxResultPhilippe Mathieu-Daudé
dma_memory_write() returns a MemTxResult type. Do not discard it, return it to the caller. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20211223115554.3155328-18-philmd@redhat.com>
2021-12-31dma: Let ld*_dma() take MemTxAttrs argumentPhilippe Mathieu-Daudé
Let devices specify transaction attributes when calling ld*_dma(). Keep the default MEMTXATTRS_UNSPECIFIED in the few callers. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20211223115554.3155328-17-philmd@redhat.com>
2021-12-31dma: Let st*_dma() take MemTxAttrs argumentPhilippe Mathieu-Daudé
Let devices specify transaction attributes when calling st*_dma(). Keep the default MEMTXATTRS_UNSPECIFIED in the few callers. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20211223115554.3155328-16-philmd@redhat.com>
2021-12-31dma: Let dma_buf_read() take MemTxAttrs argumentPhilippe Mathieu-Daudé
Let devices specify transaction attributes when calling dma_buf_read(). Keep the default MEMTXATTRS_UNSPECIFIED in the few callers. Reviewed-by: Klaus Jensen <k.jensen@samsung.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20211223115554.3155328-13-philmd@redhat.com>
2021-12-31dma: Let dma_buf_write() take MemTxAttrs argumentPhilippe Mathieu-Daudé
Let devices specify transaction attributes when calling dma_buf_write(). Keep the default MEMTXATTRS_UNSPECIFIED in the few callers. Reviewed-by: Klaus Jensen <k.jensen@samsung.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20211223115554.3155328-12-philmd@redhat.com>
2021-12-30dma: Have dma_buf_read() / dma_buf_write() take a void pointerPhilippe Mathieu-Daudé
DMA operations are run on any kind of buffer, not arrays of uint8_t. Convert dma_buf_read/dma_buf_write functions to take a void pointer argument and save us pointless casts to uint8_t *. Remove this pointless casts in the megasas device model. Reviewed-by: Klaus Jensen <k.jensen@samsung.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20211223115554.3155328-9-philmd@redhat.com>
2021-12-30dma: Let dma_memory_map() take MemTxAttrs argumentPhilippe Mathieu-Daudé
Let devices specify transaction attributes when calling dma_memory_map(). Patch created mechanically using spatch with this script: @@ expression E1, E2, E3, E4; @@ - dma_memory_map(E1, E2, E3, E4) + dma_memory_map(E1, E2, E3, E4, MEMTXATTRS_UNSPECIFIED) Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20211223115554.3155328-7-philmd@redhat.com>
2021-12-30dma: Let dma_memory_read/write() take MemTxAttrs argumentPhilippe Mathieu-Daudé
Let devices specify transaction attributes when calling dma_memory_read() or dma_memory_write(). Patch created mechanically using spatch with this script: @@ expression E1, E2, E3, E4; @@ ( - dma_memory_read(E1, E2, E3, E4) + dma_memory_read(E1, E2, E3, E4, MEMTXATTRS_UNSPECIFIED) | - dma_memory_write(E1, E2, E3, E4) + dma_memory_write(E1, E2, E3, E4, MEMTXATTRS_UNSPECIFIED) ) Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20211223115554.3155328-6-philmd@redhat.com>
2021-12-30dma: Let dma_memory_rw() take MemTxAttrs argumentPhilippe Mathieu-Daudé
Let devices specify transaction attributes when calling dma_memory_rw(). Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20211223115554.3155328-5-philmd@redhat.com>
2021-12-30dma: Let dma_memory_rw_relaxed() take MemTxAttrs argumentPhilippe Mathieu-Daudé
We will add the MemTxAttrs argument to dma_memory_rw() in the next commit. Since dma_memory_rw_relaxed() is only used by dma_memory_rw(), modify it first in a separate commit to keep the next commit easier to review. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20211223115554.3155328-4-philmd@redhat.com>
2021-12-30dma: Let dma_memory_set() take MemTxAttrs argumentPhilippe Mathieu-Daudé
Let devices specify transaction attributes when calling dma_memory_set(). Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20211223115554.3155328-3-philmd@redhat.com>
2021-12-30dma: Let dma_memory_valid() take MemTxAttrs argumentPhilippe Mathieu-Daudé
Let devices specify transaction attributes when calling dma_memory_valid(). Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20211223115554.3155328-2-philmd@redhat.com>
2021-03-12dma: Introduce dma_aligned_pow2_mask()Eric Auger
Currently get_naturally_aligned_size() is used by the intel iommu to compute the maximum invalidation range based on @size which is a power of 2 while being aligned with the @start address and less than the maximum range defined by @gaw. This helper is also useful for other iommu devices (virtio-iommu, SMMUv3) to make sure IOMMU UNMAP notifiers only are called with power of 2 range sizes. Let's move this latter into dma-helpers.c and rename it into dma_aligned_pow2_mask(). Also rewrite the helper so that it accomodates UINT64_MAX values for the size mask and max mask. It now returns a mask instead of a size. Change the caller. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Message-id: 20210309102742.30442-3-eric.auger@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-12-10dma: Let dma_memory_write() propagate MemTxResultPhilippe Mathieu-Daudé
dma_memory_rw_relaxed() returns a MemTxResult type. Do not discard it, return it to the caller. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20201023151923.3243652-8-philmd@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-12-10dma: Let dma_memory_read() propagate MemTxResultPhilippe Mathieu-Daudé
dma_memory_rw_relaxed() returns a MemTxResult type. Do not discard it, return it to the caller. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20201023151923.3243652-7-philmd@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-12-10dma: Let dma_memory_rw() propagate MemTxResultPhilippe Mathieu-Daudé
address_space_rw() returns a MemTxResult type. Do not discard it, return it to the caller. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20201023151923.3243652-6-philmd@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-12-10dma: Let dma_memory_set() propagate MemTxResultPhilippe Mathieu-Daudé
address_space_write() returns a MemTxResult type. Do not discard it, return it to the caller. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20201023151923.3243652-5-philmd@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-12-10dma: Document address_space_map/address_space_unmap() prototypesPhilippe Mathieu-Daudé
Add documentation based on address_space_map / address_space_unmap. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20201023151923.3243652-4-philmd@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-08-16Include hw/hw.h exactly where neededMarkus Armbruster
In my "build everything" tree, changing hw/hw.h triggers a recompile of some 2600 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). The previous commits have left only the declaration of hw_error() in hw/hw.h. This permits dropping most of its inclusions. Touching it now recompiles less than 200 objects. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190812052359.30071-19-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2018-05-31Make address_space_access_valid() take a MemTxAttrs argumentPeter Maydell
As part of plumbing MemTxAttrs down to the IOMMU translate method, add MemTxAttrs as an argument to address_space_access_valid(). Its callers either have an attrs value to hand, or don't care and can use MEMTXATTRS_UNSPECIFIED. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20180521140402.23318-6-peter.maydell@linaro.org
2018-05-31Make address_space_map() take a MemTxAttrs argumentPeter Maydell
As part of plumbing MemTxAttrs down to the IOMMU translate method, add MemTxAttrs as an argument to address_space_map(). Its callers either have an attrs value to hand, or don't care and can use MEMTXATTRS_UNSPECIFIED. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20180521140402.23318-5-peter.maydell@linaro.org
2016-10-27dma-helpers: explicitly pass alignment into DMA helpersMark Cave-Ayland
The hard-coded default alignment is BDRV_SECTOR_SIZE, however this is not necessarily the case for all platforms. Use this as the default alignment for all current callers. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Eric Blake <eblake@redhat.com> Acked-by: John Snow <jsnow@redhat.com> Message-id: 1476445266-27503-2-git-send-email-mark.cave-ayland@ilande.co.uk Signed-off-by: John Snow <jsnow@redhat.com>
2016-05-25dma-helpers: change BlockBackend to opaque value in DMAIOFuncPaolo Bonzini
Callers of dma_blk_io have no way to pass extra data to the DMAIOFunc, because the original callback and opaque are gone by the time DMAIOFunc is called. On the other hand, the BlockBackend is usually derived from those extra data that you could pass to the DMAIOFunc (in the next patch, that would be the SCSIRequest). So change DMAIOFunc's prototype, decoupling it from blk_aio_readv and blk_aio_writev's. The new prototype loses the BlockBackend and gains an extra opaque value which, in the case of dma_blk_readv and dma_blk_writev, is of course used for the BlockBackend. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-05-25dma-helpers: change interface to byte-basedPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-05-19dma: do not depend on kvm_enabled()Paolo Bonzini
Memory barriers are needed also by Xen and, when the ioeventfd bugs are fixed, by TCG as well. sysemu/kvm.h is not anymore needed in sysemu/dma.h, move it to the actual users. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-12ide: Switch to byte-based aio block accessEric Blake
Sector-based blk_aio_readv() and blk_aio_writev() should die; switch to byte-based blk_aio_preadv() and blk_aio_pwritev() instead. The patch had to touch multiple files at once, because dma_blk_io() takes pointers to the functions, and ide_issue_trim() piggybacks on the same interface (while ignoring offset under the hood). Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2016-02-23include: Clean up includesPeter Maydell
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. NB: If this commit breaks compilation for your out-of-tree patchseries or fork, then you need to make sure you add #include "qemu/osdep.h" to any new .c files that you have. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-04-26exec.c: Make address_space_rw take transaction attributesPeter Maydell
Make address_space_rw take transaction attributes, rather than always using the 'unspecified' attributes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2014-10-20hw: Convert from BlockDriverState to BlockBackend, mostlyMarkus Armbruster
Device models should access their block backends only through the block-backend.h API. Convert them, and drop direct includes of inappropriate headers. Just four uses of BlockDriverState are left: * The Xen paravirtual block device backend (xen_disk.c) opens images itself when set up via xenbus, bypassing blockdev.c. I figure it should go through qmp_blockdev_add() instead. * Device model "usb-storage" prompts for keys. No other device model does, and this one probably shouldn't do it, either. * ide_issue_trim_cb() uses bdrv_aio_discard() instead of blk_aio_discard() because it fishes its backend out of a BlockAIOCB, which has only the BlockDriverState. * PC87312State has an unused BlockDriverState[] member. The next two commits take care of the latter two. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Rename BlockDriverCompletionFunc to BlockCompletionFuncMarkus Armbruster
I'll use it with block backends shortly, and the name is going to fit badly there. It's a block layer thing anyway, not just a block driver thing. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Rename BlockDriverAIOCB* to BlockAIOCB*Markus Armbruster
I'll use BlockDriverAIOCB with block backends shortly, and the name is going to fit badly there. It's a block layer thing anyway, not just a block driver thing. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-09-10block: Extract the block accounting codeBenoît Canet
The plan is to add new accounting metrics (latency, invalid requests, failed requests, queue depth) and block.c is overpopulated so it will be better to work in a separate module. Moreover the long term plan is to have statistics in each of the BDS of the graph for metrology purpose; this means that the device model statistics must move from the topmost BDS to the device model. So we need to decouple the statistic code from BlockDriverState. This is another argument for the extraction of the code in a separate module. CC: Kevin Wolf <kwolf@redhat.com> CC: Stefan Hajnoczi <stefanha@redhat.com> CC: Max Reitz <mreitz@redhat.com> CC: Eric Blake <eblake@redhat.com> CC: Benoit Canet <benoit@irqsave.net> CC: Fam Zheng <famz@redhat.com> CC: Peter Crosthwaite <peter.crosthwaite@xilinx.com> CC: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Benoît Canet <benoit.canet@nodalink.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2013-07-04dma: keep a device alive while it has SGListsPaolo Bonzini
Reviewed-by: Anthony Liguori <aliguori@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-06-20dma: eliminate DMAContextPaolo Bonzini
The DMAContext is a simple pointer to an AddressSpace that is now always already available. Make everyone hold the address space directly, and clean up the DMA API to use the AddressSpace directly. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-06-20dma: eliminate old-style IOMMU supportPaolo Bonzini
The translate function in the DMAContext is now always NULL. Remove every reference to it. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-05-29memory: add address_space_access_validPaolo Bonzini
The old-style IOMMU lets you check whether an access is valid in a given DMAContext. There is no equivalent for AddressSpace in the memory API, implement it with a lookup of the dispatch tree. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19softmmu: move include files to include/sysemu/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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