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2017-10-31hw/ide/ahci: Move allwinner code into a separate fileThomas Huth
The allwinner code is only needed for the allwinner board (for which we also have a separate CONFIG_ALLWINNER_A10 config switch), so it does not make sense that we compile this for all the other boards that need AHCI, too. Let's move it to a separate file that is only compiled when CONFIG_ALLWINNER_A10 is set. Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 1508784509-29377-1-git-send-email-thuth@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2017-09-22ide: fix enum comparison for gcc 4.7John Snow
Apparently GCC gets bent over comparing enum values against zero. Replace the conditional with something less readable. Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20170921013821.1673-1-jsnow@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-09-18AHCI: remove DPRINTF macroJohn Snow
Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20170901001502.29915-10-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2017-09-18AHCI: pretty-print FIS to buffer instead of stderrJohn Snow
The current FIS printing routines dump the FIS to screen. adjust this such that it dumps to buffer instead, then use this ability to have FIS dump mechanisms via trace-events instead of compiled defines. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20170901001502.29915-9-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2017-09-18AHCI: Rework IRQ constantsJohn Snow
Create a new enum so that we can name the IRQ bits, which will make debugging them a little nicer if we can print them out. Not handled in this patch, but this will make it possible to get a nice debug printf detailing exactly which status bits are set, as it can be multiple at any given time. As a consequence of this patch, it is no longer possible to set multiple IRQ codes at once, but nothing was utilizing this ability anyway. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20170901001502.29915-8-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2017-09-18AHCI: Replace DPRINTF with trace-eventsJohn Snow
There are a few hangers-on that will be dealt with individually in forthcoming patches. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20170901001502.29915-7-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2017-09-18ide: ahci: unparent children buses before freeing their memoryIgor Mammedov
Fixes read after freeing error reported https://lists.gnu.org/archive/html/qemu-devel/2017-08/msg04243.html Message-Id: <59a56959-ca12-ea75-33fa-ff07eba1b090@redhat.com> ich9-ahci device creates ide buses and attaches them as QOM children at realize time, however it forgets to properly clean them up at unrealize time and frees memory containing these children, with following call-chain: qdev_device_add() object_property_set_bool('realized', true) device_set_realized() ... pci_qdev_realize() -> pci_ich9_ahci_realize() -> ahci_realize() ... s->dev = g_new0(AHCIDevice, ports); ... AHCIDevice *ad = &s->dev[i]; ide_bus_new(&ad->port, sizeof(ad->port), qdev, i, 1); ^^^ creates bus in memory allocated by above gnew() and adds it as child propety to ahci device ... hotplug_handler_plug(); -> goto post_realize_fail; pci_qdev_unrealize() -> pci_ich9_uninit() -> ahci_uninit() ... g_free(s->dev); ^^^ free memory that holds children busses return with error from device_set_realized() As result later when qdev_device_add() tries to unparent ich9-ahci after failed device_set_realized(), object_unparent() -> object_property_del_child() iterates over existing QOM children including buses added by ide_bus_new() and tries to unparent them, which causes access to freed memory where they where located. Reported-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Thomas Huth <thuth@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 1503938085-169486-1-git-send-email-imammedo@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2017-07-18ahci: split public and private interfaceJohn Snow
Complete the split by renaming ahci_public.h --> ahci.h and moving the current ahci.h to hw/ide/ahci_internal.h. Adjust ahci_internal.h to now load ahci.h instead of ahci_public.h. Finalize the split by switching external users to the new header. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20170623220926.11479-4-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2017-07-18ahci: add ahci_get_num_portsJohn Snow
Instead of reaching into the PCI state, allow the AHCIDevice to respond with how many ports it has. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20170623220926.11479-2-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2017-06-28vmstate: error hint for failed equal checksHalil Pasic
In some cases a failing VMSTATE_*_EQUAL does not mean we detected a bug, but it's actually the best we can do. Especially in these cases a verbose error message is required. Let's introduce infrastructure for specifying a error hint to be used if equal check fails. Let's do this by adding a parameter to the _EQUAL macros called _err_hint. Also change all current users to pass NULL as last parameter so nothing changes for them. Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com> Message-Id: <20170623144823.42936-1-pasic@linux.vnet.ibm.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2017-03-15ide: ahci: call cleanup function in ahci unitLi Qiang
This can avoid memory leak when hotunplug the ahci device. Signed-off-by: Li Qiang <liqiang6-s@360.cn> Message-id: 1488449293-80280-4-git-send-email-liqiang6-s@360.cn Signed-off-by: John Snow <jsnow@redhat.com>
2017-02-10ahci: advertise HOST_CAP_64Ladi Prosek
The AHCI emulation code supports 64-bit addressing and should advertise this fact in the Host Capabilities register. Both Linux and Windows drivers test this bit to decide if the upper 32 bits of various registers may be written to, and at least some versions of Windows have a bug where DMA is attempted with an address above 4GB but, in the absence of HOST_CAP_64, the upper 32 bits are left unititialized which leads to a memory corruption. [Maintainer edit: This fixes https://bugzilla.redhat.com/show_bug.cgi?id=1411105, which affects Windows Server 2008 SP2 in some cases.] Signed-off-by: Ladi Prosek <lprosek@redhat.com> Message-id: 1484305370-6220-1-git-send-email-lprosek@redhat.com [Amended commit message --js] Signed-off-by: John Snow <jsnow@redhat.com>
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>
2016-09-29ahci: clear aiocb in ncq_cbJohn Snow
Similar to existing fixes for IDE (87ac25fd) and ATAPI (7f951b2d), the AIOCB must be cleared in the callback. Otherwise, we may accidentally try to reset a dangling pointer in bdrv_aio_cancel() from a port reset. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1474575040-32079-2-git-send-email-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2016-08-08ahci: fix sglist leak on retryMarc-André Lureau
ahci-test /x86_64/ahci/io/dma/lba28/retry triggers the following leak: Direct leak of 16 byte(s) in 1 object(s) allocated from: #0 0x7fc4b2a25e20 in malloc (/lib64/libasan.so.3+0xc6e20) #1 0x7fc4993bce58 in g_malloc (/lib64/libglib-2.0.so.0+0x4ee58) #2 0x556a187d4b34 in ahci_populate_sglist hw/ide/ahci.c:896 #3 0x556a187d8237 in ahci_dma_prepare_buf hw/ide/ahci.c:1367 #4 0x556a187b5a1a in ide_dma_cb hw/ide/core.c:844 #5 0x556a187d7eec in ahci_start_dma hw/ide/ahci.c:1333 #6 0x556a187b650b in ide_start_dma hw/ide/core.c:921 #7 0x556a187b61e6 in ide_sector_start_dma hw/ide/core.c:911 #8 0x556a187b9e26 in cmd_write_dma hw/ide/core.c:1486 #9 0x556a187bd519 in ide_exec_cmd hw/ide/core.c:2027 #10 0x556a187d71c5 in handle_reg_h2d_fis hw/ide/ahci.c:1204 #11 0x556a187d7681 in handle_cmd hw/ide/ahci.c:1254 #12 0x556a187d168a in check_cmd hw/ide/ahci.c:510 #13 0x556a187d0afc in ahci_port_write hw/ide/ahci.c:314 #14 0x556a187d105d in ahci_mem_write hw/ide/ahci.c:435 #15 0x556a1831d959 in memory_region_write_accessor /home/elmarco/src/qemu/memory.c:525 #16 0x556a1831dc35 in access_with_adjusted_size /home/elmarco/src/qemu/memory.c:591 #17 0x556a18323ce3 in memory_region_dispatch_write /home/elmarco/src/qemu/memory.c:1262 #18 0x556a1828cf67 in address_space_write_continue /home/elmarco/src/qemu/exec.c:2578 #19 0x556a1828d20b in address_space_write /home/elmarco/src/qemu/exec.c:2635 #20 0x556a1828d92b in address_space_rw /home/elmarco/src/qemu/exec.c:2737 #21 0x556a1828daf7 in cpu_physical_memory_rw /home/elmarco/src/qemu/exec.c:2746 #22 0x556a183068d3 in cpu_physical_memory_write /home/elmarco/src/qemu/include/exec/cpu-common.h:72 #23 0x556a18308194 in qtest_process_command /home/elmarco/src/qemu/qtest.c:382 #24 0x556a18309999 in qtest_process_inbuf /home/elmarco/src/qemu/qtest.c:573 #25 0x556a18309a4a in qtest_read /home/elmarco/src/qemu/qtest.c:585 #26 0x556a18598b85 in qemu_chr_be_write_impl /home/elmarco/src/qemu/qemu-char.c:387 #27 0x556a18598c52 in qemu_chr_be_write /home/elmarco/src/qemu/qemu-char.c:399 #28 0x556a185a2afa in tcp_chr_read /home/elmarco/src/qemu/qemu-char.c:2902 #29 0x556a18cbaf52 in qio_channel_fd_source_dispatch io/channel-watch.c:84 Follow John Snow recommendation: Everywhere else ncq_err is used, it is accompanied by a list cleanup except for ncq_cb, which is the case you are fixing here. Move the sglist destruction inside of ncq_err and then delete it from the other two locations to keep it tidy. Call dma_buf_commit in ide_dma_cb after the early return. Though, this is also a little wonky because this routine does more than clear the list, but it is at the moment the centralized "we're done with the sglist" function and none of the other side effects that occur in dma_buf_commit will interfere with the reset that occurs from ide_restart_bh, I think Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com>
2016-08-08ahci: free irqs arrayMarc-André Lureau
Each irq is referenced by the IDEBus in ide_init2(), thus we can free the no longer used array. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Acked-by: John Snow <jsnow@redhat.com>
2016-07-12Use #include "..." for our own headers, <...> for othersMarkus Armbruster
Tracked down with an ugly, brittle and probably buggy Perl script. Also move includes converted to <...> up so they get included before ours where that's obviously okay. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Tested-by: Eric Blake <eblake@redhat.com> Reviewed-by: Richard Henderson <rth@twiddle.net>
2016-06-29ide: move headers to include folderEfimov Vasily
The patch moves "hw/ide/achi.h", "hw/ide/pci.h" and "hw/ide/internal.h" headers to corresponding folders inside "include" folder alike other Qemu headers. Signed-off-by: Efimov Vasily <real@ispras.ru> Signed-off-by: Paolo Bonzini <pbonzini@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>
2016-02-10ahci: prohibit "restarting" the FIS or CLB enginesJohn Snow
If the FIS or DMA engines are already started, do not allow them to be "restarted." As a side-effect of this change, the migration post-load routine must be modified to cope. If the engines are listed as "on" in the migrated registers, they must be cleared to allow the startup routine to see the transition from "off" to "on". As a second side-effect, the extra argument to ahci_cond_engine_start is removed in favor of consistent behavior. Signed-off-by: John Snow <jsnow@redhat.com> Message-id: 1454103689-13042-5-git-send-email-jsnow@redhat.com
2016-02-10ahci: explicitly reject bad engine states on post_loadJohn Snow
Currently, we let ahci_cond_start_engines reject weird configurations where either the DMA (CLB) or FIS engines are said to be started, but their matching on/off control bit is toggled off. There should be no way to achieve this, since any time you toggle the control bit off, the status bit should always follow synchronously. Preparing for a refactor in cond_start_engines, move the rejection logic straight up into post_load. Signed-off-by: John Snow <jsnow@redhat.com> Message-id: 1454103689-13042-4-git-send-email-jsnow@redhat.com
2016-02-10ahci: handle LIST_ON and FIS_ON in map helpersJohn Snow
Instead of relying on ahci_cond_start_engines to maintain the engine status indicators itself, have the lower-layer CLB and FIS mapper helpers do it themselves. This makes the cond_start routine slightly nicer to read, and makes sure that the status indicators will always be correct. Signed-off-by: John Snow <jsnow@redhat.com> Message-id: 1454103689-13042-3-git-send-email-jsnow@redhat.com
2016-02-10ahci: Do not unmap NULL addressesJohn Snow
Definitely don't try to unmap a garbage address. Reported-by: Zuozhi fzz <zuozhi.fzz@alibaba-inc.com> Signed-off-by: John Snow <jsnow@redhat.com> Message-id: 1454103689-13042-2-git-send-email-jsnow@redhat.com
2016-01-29ide: 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. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1453832250-766-17-git-send-email-peter.maydell@linaro.org
2016-01-11ide: ahci: reset ncq object to unused on errorPrasad J Pandit
When processing NCQ commands, AHCI device emulation prepares a NCQ transfer object; To which an aio control block(aiocb) object is assigned in 'execute_ncq_command'. In case, when the NCQ command is invalid, the 'aiocb' object is not assigned, and NCQ transfer object is left as 'used'. This leads to a use after free kind of error in 'bdrv_aio_cancel_async' via 'ahci_reset_port'. Reset NCQ transfer object to 'unused' to avoid it. [Maintainer edit: s/ACHI/AHCI/ in the commit message. --js] Reported-by: Qinghao Tang <luodalongde@gmail.com> Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 1452282511-4116-1-git-send-email-ppandit@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
2015-11-06ahci: Add allwinner AHCIPeter Crosthwaite
Add a Sysbus AHCI subclass for the Allwinner AHCI. It has a few extra vendor specific registers which are used for phy and power init. Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 833b5b05ed5ade38bf69656679b0a7575e79492b.1445917756.git.crosthwaite.peter@gmail.com [resolved patch context on pull --js] Signed-off-by: John Snow <jsnow@redhat.com>
2015-11-06ahci: split realize and initPeter Crosthwaite
Do the init level tasks asap and the realize later (mainly when num_ports is available). This allows sub-class realize routines to work with the device post-init. Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 1a7c7b2b32e5ccf49373a5065da5ece89730d3ac.1445917756.git.crosthwaite.peter@gmail.com Signed-off-by: John Snow <jsnow@redhat.com>
2015-11-06ahci: Add some MMIO debug printfsPeter Crosthwaite
These are useful for bringup of AHCI. Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 517ba413dce7deb4ab17c0cc1e8bbdaaace2a0db.1445917756.git.crosthwaite.peter@gmail.com Signed-off-by: John Snow <jsnow@redhat.com>
2015-11-06ide: remove hardcoded 2GiB transactional limitJohn Snow
Not that you can request a >2GiB transaction, but that's why checking for it makes no sense anymore. With the newer 'limit' parameter to prepare_buf, we no longer need a static limit. The maximum limit is still 2GiB, but the limit parameter is set to the current transaction size, which cannot surpass 32MiB (512 * 65536). If the PRDT surpasses the transactional size, then, we'll just carry out the normative underflow handling pathways instead of needing an extra, strange pathway that worries about hitting some logistical cap for the largest sglist we can support -- we'll never even attempt to build one that big anymore. Reported-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: John Snow <jsnow@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1445902682-20051-1-git-send-email-jsnow@redhat.com
2015-10-18hw/ide/ahci.c: Fix shift left into sign bitPeter Maydell
Avoid undefined behaviour from shifting left into the sign bit: hw/ide/ahci.c:551:36: runtime error: left shift of 255 by 24 places cannot be represented in type 'int' (Unfortunately C's promotion rules mean that in the expression "some_uint8_t_variable << 24" the LHS gets promoted to signed int before shifting.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: John Snow <jsnow@redhat.com>
2015-09-18ahci: clean up initial d2h semanticsJohn Snow
with write_fis_d2h and signature generation tidied up, let's adjust the initial d2h semantics to make more sense. The initial d2h is considered delivered if there is guest memory to save it to. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1441140641-17631-5-git-send-email-jsnow@redhat.com
2015-09-18ahci: remove cmd_fis argument from write_fis_d2hJohn Snow
It's no longer used. We used to generate a D2H FIS based upon the command FIS that prompted the update, but in reality, the D2H FIS is generated purely from register state. cmd_fis is vestigial, so get rid of it. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1441140641-17631-4-git-send-email-jsnow@redhat.com
2015-09-18ahci: fix signature generationJohn Snow
The initial register device-to-host FIS no longer needs to specially set certain fields, as these can be handled generically by setting those fields explicitly with the signatures we want at port reset time. (1) Signatures are decomposed into their four component registers and set upon (AHCI) port reset. (2) the signature cache register is no longer set manually per-each device type, but instead just once during ahci_init_d2h. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1441140641-17631-3-git-send-email-jsnow@redhat.com
2015-09-18ahci: remove dead reset codeJohn Snow
This check is dead due to an earlier conditional. AHCI does not currently support hotplugging, so checks to see if devices are present or not are useless. Remove it. Reported-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1441140641-17631-2-git-send-email-jsnow@redhat.com
2015-09-17ide: unify io_buffer_offset incrementsJohn Snow
IDEState's io_buffer_offset was originally added to keep track of offsets in AHCI rather exclusively, but it was added to IDEState instead of an AHCI-specific structure. AHCI fakes all PIO transfers using DMA and a scatter-gather list. When the core or atapi layers invoke HBA-specific mechanisms for transfers, they do not always know that it is being backed by DMA or a sglist, so this offset is not always updated by the HBA code everywhere. If we modify it in dma_buf_commit, however, any HBA that needs to use this offset to manage operating on only part of a sglist will have access to it. This will fix ATAPI PIO transfers performed through the AHCI HBA, which were previously not modifying this value appropriately. This will fix ATAPI PIO transfers larger than one sector. Reported-by: Hannes Reinecke <hare@suse.de> Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Tested-by: Laszlo Ersek <lersek@redhat.com> Message-id: 1440546331-29087-2-git-send-email-jsnow@redhat.com CC: qemu-stable@nongnu.org
2015-09-11trivial: remove trailing newline from error_reportJohn Snow
Minor cleanup. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Gonglei <arei.gonglei@huawei.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-09-08ahci.c: Don't assume AHCIState's parent is AHCIPCIStateAlistair Francis
The AHCIState struct can either have AHCIPCIState or SysbusAHCIState as a parent. The ahci_irq_lower() and ahci_irq_raise() functions assume that it is always AHCIPCIState, which is not always the case, which causes a seg fault. Verify what the container of AHCIState is before setting the PCIDevice struct. Signed-off-by: Alistair Francis <alistair.francis@xilinx.com> Acked-by: John Snow <jsnow@redhat.com> Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-09-08ahci: Separate the AHCI state structure into the headerAlistair Francis
Pull the AHCI state structure out into the header. This allows other containers to access the struct. This is required to add the device to modern SoC containers. Signed-off-by: Alistair Francis <alistair.francis@xilinx.com> Reviewed-by: Sai Pavan Boddu <saipava@xilinx.com> Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-07-20ahci: Force ICC bits in PxCMD to zeroStefan Fritsch
The AHCI spec requires that the HBA sets the ICC bits to zero after the ICC change is done. Since we don't do any ICC change, force the bits to zero all the time. This fixes delays with some OSs (e.g. OpenBSD) waiting for the ICC bits to change to 0. Signed-off-by: Stefan Fritsch <sf@sfritsch.de> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: E1ZFpg7-00027N-HW@eru.sfritsch.de Signed-off-by: John Snow <jsnow@redhat.com>
2015-07-04ahci: fix sdb fis semanticsJohn Snow
There are two things to fix here: The first one is subtle: the PxSACT register in the AHCI HBA has different semantics from the field it is shadowing, the ACT field in the Set Device Bits FIS. In the HBA register, PxSACT acts as a bitfield indicating outstanding NCQ commands where a set bit indicates a pending NCQ operation. The FIS field however operates as an RWC register update to PxSACT, where a set bit indicates a *successfully* completed command. Correct the FIS semantics. At the same time, move the "clear finished" action to the SDB FIS generation instead of the register read to mimick how the other shadow registers work, which always just report the last reported value from a FIS, and not the most current values which may not have been reported by a FIS yet. Lastly and more simply, SATA 3.2 section 13.6.4.2 (and later sections) all specify that the Interrupt bit for the SDB FIS should always be set to one for NCQ commands. That's currently the only time we generate this FIS, so set it on all the time. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435767578-32743-16-git-send-email-jsnow@redhat.com
2015-07-04ahci: Do not map cmd_fis to generate responseJohn Snow
The Register D2H FIS should copy the current values of the registers instead of just parroting back the same values the guest sent back to it. In this case, the SECTOR COUNT variables are actually not generally meaningful in terms of standard commands (See ATA8-AC3 Section 9.2 Normal Outputs), so it actually probably doesn't matter what we put in here. Meanwhile, we do need to use the Register update FIS from the NCQ pathways (in error cases), so getting rid of references to cur_cmd here is a win for AHCI concurrency. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435767578-32743-14-git-send-email-jsnow@redhat.com
2015-07-04ahci: ncq migrationJohn Snow
Migrate the NCQ queue. This is solely for the benefit of halted commands, since anything else should have completed and had any relevant status flushed to the HBA registers already. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435767578-32743-13-git-send-email-jsnow@redhat.com
2015-07-04ahci: add get_cmd_header helperJohn Snow
cur_cmd is an internal bookmark that points to the current AHCI Command Header being processed by the AHCI state machine. With NCQ needing to occasionally rely on some of the same AHCI helpers, we cannot use cur_cmd and will need to grab explicit pointers instead. In an attempt to begin relying on the cur_cmd pointer less, add a helper to let us specifically get the pointer to the command header of particular interest. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435767578-32743-12-git-send-email-jsnow@redhat.com
2015-07-04ahci: add cmd header to ncq transfer stateJohn Snow
While the rest of the AHCI device can rely on a single bookmarked pointer for the AHCI Command Header currently being processed, NCQ is asynchronous and may have many commands in flight simultaneously. Add a cmdh pointer to the ncq_tfs object and make the sglist prepare function take an AHCICmdHeader pointer so we can be explicit about where we'd like to build SGlists from. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435767578-32743-11-git-send-email-jsnow@redhat.com
2015-07-04ahci: correct ncq sector countJohn Snow
uint16_t isn't enough to hold the real sector count, since a value of zero implies a full 64K sectors, so we need a uint32_t here. We *could* cheat and pretend that this value is 0-based and fit it in a uint16_t, but I'd rather waste 2 bytes instead of a future dev's 10 minutes when they forget to +1/-1 accordingly somewhere. See SATA 3.2, section 13.6.4.1 "READ FPDMA QUEUED". Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435767578-32743-9-git-send-email-jsnow@redhat.com
2015-07-04ahci: correct types in NCQTransferStateJohn Snow
Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435767578-32743-8-git-send-email-jsnow@redhat.com
2015-07-04ahci: add rwerror=stop support for ncqJohn Snow
Handle NCQ failures for cases where we want to halt the VM on IO errors. Upon a VM state change, retry the halted NCQ commands. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435767578-32743-7-git-send-email-jsnow@redhat.com
2015-07-04ahci: factor ncq_finish out of ncq_cbJohn Snow
When we add werror=stop or rerror=stop support to NCQ, we'll want to take a codepath where we don't actually complete the command, so factor that out into a new routine. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435767578-32743-6-git-send-email-jsnow@redhat.com
2015-07-04ahci: refactor process_ncq_commandJohn Snow
Split off execute_ncq_command so that we can call it separately later if we desire. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435767578-32743-5-git-send-email-jsnow@redhat.com
2015-07-04ahci: assert is_ncq for process_ncqJohn Snow
We already checked this in the handle_cmd phase, so just change this to an assertion and simplify the error logic. (Also, fix the switch indent, because checkpatch.pl yelled.) ((Sorry for churn.)) Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1435767578-32743-4-git-send-email-jsnow@redhat.com
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