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diff --git a/documentation/content/en/books/arch-handbook/pci/_index.po b/documentation/content/en/books/arch-handbook/pci/_index.po new file mode 100644 index 0000000000..f80e3c3376 --- /dev/null +++ b/documentation/content/en/books/arch-handbook/pci/_index.po @@ -0,0 +1,787 @@ +# SOME DESCRIPTIVE TITLE +# Copyright (C) YEAR The FreeBSD Project +# This file is distributed under the same license as the FreeBSD Documentation package. +# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR. +# +#, fuzzy +msgid "" +msgstr "" +"Project-Id-Version: FreeBSD Documentation VERSION\n" +"POT-Creation-Date: 2022-02-01 09:20-0300\n" +"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n" +"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n" +"Language-Team: LANGUAGE <LL@li.org>\n" +"Language: \n" +"MIME-Version: 1.0\n" +"Content-Type: text/plain; charset=UTF-8\n" +"Content-Transfer-Encoding: 8bit\n" + +#. type: Title = +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:1 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:13 +#, no-wrap +msgid "PCI Devices" +msgstr "" + +#. type: YAML Front Matter: title +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:1 +#, no-wrap +msgid "Chapter 11. PCI Devices" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:51 +msgid "" +"This chapter will talk about the FreeBSD mechanisms for writing a device " +"driver for a device on a PCI bus." +msgstr "" + +#. type: Title == +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:53 +#, no-wrap +msgid "Probe and Attach" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:56 +msgid "" +"Information here about how the PCI bus code iterates through the unattached " +"devices and see if a newly loaded kld will attach to any of them." +msgstr "" + +#. type: Title === +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:57 +#, no-wrap +msgid "Sample Driver Source ([.filename]#mypci.c#)" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:66 +#, no-wrap +msgid "" +"/*\n" +" * Simple KLD to play with the PCI functions.\n" +" *\n" +" * Murray Stokely\n" +" */\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:76 +#, no-wrap +msgid "" +"#include <sys/param.h>\t\t/* defines used in kernel.h */\n" +"#include <sys/module.h>\n" +"#include <sys/systm.h>\n" +"#include <sys/errno.h>\n" +"#include <sys/kernel.h>\t\t/* types used in module initialization */\n" +"#include <sys/conf.h>\t\t/* cdevsw struct */\n" +"#include <sys/uio.h>\t\t/* uio struct */\n" +"#include <sys/malloc.h>\n" +"#include <sys/bus.h>\t\t/* structs, prototypes for pci bus stuff and DEVMETHOD macros! */\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:80 +#, no-wrap +msgid "" +"#include <machine/bus.h>\n" +"#include <sys/rman.h>\n" +"#include <machine/resource.h>\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:83 +#, no-wrap +msgid "" +"#include <dev/pci/pcivar.h>\t/* For pci_get macros! */\n" +"#include <dev/pci/pcireg.h>\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:89 +#, no-wrap +msgid "" +"/* The softc holds our per-instance data. */\n" +"struct mypci_softc {\n" +"\tdevice_t\tmy_dev;\n" +"\tstruct cdev\t*my_cdev;\n" +"};\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:95 +#, no-wrap +msgid "" +"/* Function prototypes */\n" +"static d_open_t\t\tmypci_open;\n" +"static d_close_t\tmypci_close;\n" +"static d_read_t\t\tmypci_read;\n" +"static d_write_t\tmypci_write;\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:97 +#, no-wrap +msgid "/* Character device entry points */\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:106 +#, no-wrap +msgid "" +"static struct cdevsw mypci_cdevsw = {\n" +"\t.d_version =\tD_VERSION,\n" +"\t.d_open =\tmypci_open,\n" +"\t.d_close =\tmypci_close,\n" +"\t.d_read =\tmypci_read,\n" +"\t.d_write =\tmypci_write,\n" +"\t.d_name =\t\"mypci\",\n" +"};\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:112 +#, no-wrap +msgid "" +"/*\n" +" * In the cdevsw routines, we find our softc by using the si_drv1 member\n" +" * of struct cdev. We set this variable to point to our softc in our\n" +" * attach routine when we create the /dev entry.\n" +" */\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:117 +#, no-wrap +msgid "" +"int\n" +"mypci_open(struct cdev *dev, int oflags, int devtype, struct thread *td)\n" +"{\n" +"\tstruct mypci_softc *sc;\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:123 +#, no-wrap +msgid "" +"\t/* Look up our softc. */\n" +"\tsc = dev->si_drv1;\n" +"\tdevice_printf(sc->my_dev, \"Opened successfully.\\n\");\n" +"\treturn (0);\n" +"}\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:128 +#, no-wrap +msgid "" +"int\n" +"mypci_close(struct cdev *dev, int fflag, int devtype, struct thread *td)\n" +"{\n" +"\tstruct mypci_softc *sc;\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:134 +#, no-wrap +msgid "" +"\t/* Look up our softc. */\n" +"\tsc = dev->si_drv1;\n" +"\tdevice_printf(sc->my_dev, \"Closed.\\n\");\n" +"\treturn (0);\n" +"}\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:139 +#, no-wrap +msgid "" +"int\n" +"mypci_read(struct cdev *dev, struct uio *uio, int ioflag)\n" +"{\n" +"\tstruct mypci_softc *sc;\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:145 +#, no-wrap +msgid "" +"\t/* Look up our softc. */\n" +"\tsc = dev->si_drv1;\n" +"\tdevice_printf(sc->my_dev, \"Asked to read %zd bytes.\\n\", uio->uio_resid);\n" +"\treturn (0);\n" +"}\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:150 +#, no-wrap +msgid "" +"int\n" +"mypci_write(struct cdev *dev, struct uio *uio, int ioflag)\n" +"{\n" +"\tstruct mypci_softc *sc;\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:156 +#, no-wrap +msgid "" +"\t/* Look up our softc. */\n" +"\tsc = dev->si_drv1;\n" +"\tdevice_printf(sc->my_dev, \"Asked to write %zd bytes.\\n\", uio->uio_resid);\n" +"\treturn (0);\n" +"}\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:158 +#, no-wrap +msgid "/* PCI Support Functions */\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:166 +#, no-wrap +msgid "" +"/*\n" +" * Compare the device ID of this device against the IDs that this driver\n" +" * supports. If there is a match, set the description and return success.\n" +" */\n" +"static int\n" +"mypci_probe(device_t dev)\n" +"{\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:169 +#, no-wrap +msgid "" +"\tdevice_printf(dev, \"MyPCI Probe\\nVendor ID : 0x%x\\nDevice ID : 0x%x\\n\",\n" +"\t pci_get_vendor(dev), pci_get_device(dev));\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:177 +#, no-wrap +msgid "" +"\tif (pci_get_vendor(dev) == 0x11c1) {\n" +"\t\tprintf(\"We've got the Winmodem, probe successful!\\n\");\n" +"\t\tdevice_set_desc(dev, \"WinModem\");\n" +"\t\treturn (BUS_PROBE_DEFAULT);\n" +"\t}\n" +"\treturn (ENXIO);\n" +"}\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:179 +#, no-wrap +msgid "/* Attach function is only called if the probe is successful. */\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:184 +#, no-wrap +msgid "" +"static int\n" +"mypci_attach(device_t dev)\n" +"{\n" +"\tstruct mypci_softc *sc;\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:186 +#, no-wrap +msgid "\tprintf(\"MyPCI Attach for : deviceID : 0x%x\\n\", pci_get_devid(dev));\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:190 +#, no-wrap +msgid "" +"\t/* Look up our softc and initialize its fields. */\n" +"\tsc = device_get_softc(dev);\n" +"\tsc->my_dev = dev;\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:203 +#, no-wrap +msgid "" +"\t/*\n" +"\t * Create a /dev entry for this device. The kernel will assign us\n" +"\t * a major number automatically. We use the unit number of this\n" +"\t * device as the minor number and name the character device\n" +"\t * \"mypci<unit>\".\n" +"\t */\n" +"\tsc->my_cdev = make_dev(&mypci_cdevsw, device_get_unit(dev),\n" +"\t UID_ROOT, GID_WHEEL, 0600, \"mypci%u\", device_get_unit(dev));\n" +"\tsc->my_cdev->si_drv1 = sc;\n" +"\tprintf(\"Mypci device loaded.\\n\");\n" +"\treturn (0);\n" +"}\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:205 +#, no-wrap +msgid "/* Detach device. */\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:210 +#, no-wrap +msgid "" +"static int\n" +"mypci_detach(device_t dev)\n" +"{\n" +"\tstruct mypci_softc *sc;\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:217 +#, no-wrap +msgid "" +"\t/* Teardown the state in our softc created in our attach routine. */\n" +"\tsc = device_get_softc(dev);\n" +"\tdestroy_dev(sc->my_cdev);\n" +"\tprintf(\"Mypci detach!\\n\");\n" +"\treturn (0);\n" +"}\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:219 +#, no-wrap +msgid "/* Called during system shutdown after sync. */\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:223 +#, no-wrap +msgid "" +"static int\n" +"mypci_shutdown(device_t dev)\n" +"{\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:227 +#, no-wrap +msgid "" +"\tprintf(\"Mypci shutdown!\\n\");\n" +"\treturn (0);\n" +"}\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:234 +#, no-wrap +msgid "" +"/*\n" +" * Device suspend routine.\n" +" */\n" +"static int\n" +"mypci_suspend(device_t dev)\n" +"{\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:238 +#, no-wrap +msgid "" +"\tprintf(\"Mypci suspend!\\n\");\n" +"\treturn (0);\n" +"}\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:245 +#, no-wrap +msgid "" +"/*\n" +" * Device resume routine.\n" +" */\n" +"static int\n" +"mypci_resume(device_t dev)\n" +"{\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:249 +#, no-wrap +msgid "" +"\tprintf(\"Mypci resume!\\n\");\n" +"\treturn (0);\n" +"}\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:258 +#, no-wrap +msgid "" +"static device_method_t mypci_methods[] = {\n" +"\t/* Device interface */\n" +"\tDEVMETHOD(device_probe,\t\tmypci_probe),\n" +"\tDEVMETHOD(device_attach,\tmypci_attach),\n" +"\tDEVMETHOD(device_detach,\tmypci_detach),\n" +"\tDEVMETHOD(device_shutdown,\tmypci_shutdown),\n" +"\tDEVMETHOD(device_suspend,\tmypci_suspend),\n" +"\tDEVMETHOD(device_resume,\tmypci_resume),\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:261 +#, no-wrap +msgid "" +"\tDEVMETHOD_END\n" +"};\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:263 +#, no-wrap +msgid "static devclass_t mypci_devclass;\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:266 +#, no-wrap +msgid "" +"DEFINE_CLASS_0(mypci, mypci_driver, mypci_methods, sizeof(struct mypci_softc));\n" +"DRIVER_MODULE(mypci, pci, mypci_driver, mypci_devclass, 0, 0);\n" +msgstr "" + +#. type: Title === +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:268 +#, no-wrap +msgid "[.filename]#Makefile# for Sample Driver" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:273 +#, no-wrap +msgid "# Makefile for mypci driver\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:277 +#, no-wrap +msgid "" +"KMOD=\tmypci\n" +"SRCS=\tmypci.c\n" +"SRCS+=\tdevice_if.h bus_if.h pci_if.h\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:279 +#, no-wrap +msgid ".include <bsd.kmod.mk>\n" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:282 +msgid "" +"If you place the above source file and [.filename]#Makefile# into a " +"directory, you may run `make` to compile the sample driver. Additionally, " +"you may run `make load` to load the driver into the currently running kernel " +"and `make unload` to unload the driver after it is loaded." +msgstr "" + +#. type: Title === +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:283 +#, no-wrap +msgid "Additional Resources" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:286 +msgid "http://www.pcisig.org/[PCI Special Interest Group]" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:287 +msgid "PCI System Architecture, Fourth Edition by Tom Shanley, et al." +msgstr "" + +#. type: Title == +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:289 +#, no-wrap +msgid "Bus Resources" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:292 +msgid "" +"FreeBSD provides an object-oriented mechanism for requesting resources from " +"a parent bus. Almost all devices will be a child member of some sort of bus " +"(PCI, ISA, USB, SCSI, etc) and these devices need to acquire resources from " +"their parent bus (such as memory segments, interrupt lines, or DMA channels)." +msgstr "" + +#. type: Title === +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:293 +#, no-wrap +msgid "Base Address Registers" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:296 +msgid "" +"To do anything particularly useful with a PCI device you will need to obtain " +"the _Base Address Registers_ (BARs) from the PCI Configuration space. The " +"PCI-specific details of obtaining the BAR are abstracted in the " +"`bus_alloc_resource()` function." +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:298 +msgid "" +"For example, a typical driver might have something similar to this in the " +"`attach()` function:" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:309 +#, no-wrap +msgid "" +" sc->bar0id = PCIR_BAR(0);\n" +" sc->bar0res = bus_alloc_resource(dev, SYS_RES_MEMORY, &sc->bar0id,\n" +"\t\t\t\t 0, ~0, 1, RF_ACTIVE);\n" +" if (sc->bar0res == NULL) {\n" +" printf(\"Memory allocation of PCI base register 0 failed!\\n\");\n" +" error = ENXIO;\n" +" goto fail1;\n" +" }\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:322 +#, no-wrap +msgid "" +" sc->bar1id = PCIR_BAR(1);\n" +" sc->bar1res = bus_alloc_resource(dev, SYS_RES_MEMORY, &sc->bar1id,\n" +"\t\t\t\t 0, ~0, 1, RF_ACTIVE);\n" +" if (sc->bar1res == NULL) {\n" +" printf(\"Memory allocation of PCI base register 1 failed!\\n\");\n" +" error = ENXIO;\n" +" goto fail2;\n" +" }\n" +" sc->bar0_bt = rman_get_bustag(sc->bar0res);\n" +" sc->bar0_bh = rman_get_bushandle(sc->bar0res);\n" +" sc->bar1_bt = rman_get_bustag(sc->bar1res);\n" +" sc->bar1_bh = rman_get_bushandle(sc->bar1res);\n" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:325 +msgid "" +"Handles for each base address register are kept in the `softc` structure so " +"that they can be used to write to the device later." +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:327 +msgid "" +"These handles can then be used to read or write from the device registers " +"with the `bus_space_*` functions. For example, a driver might contain a " +"shorthand function to read from a board specific register like this:" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:335 +#, no-wrap +msgid "" +"uint16_t\n" +"board_read(struct ni_softc *sc, uint16_t address)\n" +"{\n" +" return bus_space_read_2(sc->bar1_bt, sc->bar1_bh, address);\n" +"}\n" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:338 +msgid "Similarly, one could write to the registers with:" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:346 +#, no-wrap +msgid "" +"void\n" +"board_write(struct ni_softc *sc, uint16_t address, uint16_t value)\n" +"{\n" +" bus_space_write_2(sc->bar1_bt, sc->bar1_bh, address, value);\n" +"}\n" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:349 +msgid "" +"These functions exist in 8bit, 16bit, and 32bit versions and you should use " +"`bus_space_{read|write}_{1|2|4}` accordingly." +msgstr "" + +#. type: delimited block = 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:353 +msgid "" +"In FreeBSD 7.0 and later, you can use the `bus_*` functions instead of " +"`bus_space_*`. The `bus_*` functions take a struct resource * pointer " +"instead of a bus tag and handle. Thus, you could drop the bus tag and bus " +"handle members from the `softc` and rewrite the `board_read()` function as:" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:361 +#, no-wrap +msgid "" +"uint16_t\n" +"board_read(struct ni_softc *sc, uint16_t address)\n" +"{\n" +"\treturn (bus_read(sc->bar1res, address));\n" +"}\n" +msgstr "" + +#. type: Title === +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:365 +#, no-wrap +msgid "Interrupts" +msgstr "" + +#. type: delimited block = 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:368 +msgid "" +"Interrupts are allocated from the object-oriented bus code in a way similar " +"to the memory resources. First an IRQ resource must be allocated from the " +"parent bus, and then the interrupt handler must be set up to deal with this " +"IRQ." +msgstr "" + +#. type: delimited block = 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:370 +msgid "Again, a sample from a device `attach()` function says more than words." +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:374 +#, no-wrap +msgid "/* Get the IRQ resource */\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:383 +#, no-wrap +msgid "" +" sc->irqid = 0x0;\n" +" sc->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &(sc->irqid),\n" +"\t\t\t\t 0, ~0, 1, RF_SHAREABLE | RF_ACTIVE);\n" +" if (sc->irqres == NULL) {\n" +"\tprintf(\"IRQ allocation failed!\\n\");\n" +"\terror = ENXIO;\n" +"\tgoto fail3;\n" +" }\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:385 +#, no-wrap +msgid " /* Now we should set up the interrupt handler */\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:392 +#, no-wrap +msgid "" +" error = bus_setup_intr(dev, sc->irqres, INTR_TYPE_MISC,\n" +"\t\t\t my_handler, sc, &(sc->handler));\n" +" if (error) {\n" +"\tprintf(\"Couldn't set up irq\\n\");\n" +"\tgoto fail4;\n" +" }\n" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:395 +msgid "" +"Some care must be taken in the detach routine of the driver. You must " +"quiesce the device's interrupt stream, and remove the interrupt handler. " +"Once `bus_teardown_intr()` has returned, you know that your interrupt " +"handler will no longer be called and that all threads that might have been " +"executing this interrupt handler have returned. Since this function can " +"sleep, you must not hold any mutexes when calling this function." +msgstr "" + +#. type: Title === +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:396 +#, no-wrap +msgid "DMA" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:399 +msgid "" +"This section is obsolete, and present only for historical reasons. The " +"proper methods for dealing with these issues is to use the " +"`bus_space_dma*()` functions instead. This paragraph can be removed when " +"this section is updated to reflect that usage. However, at the moment, the " +"API is in a bit of flux, so once that settles down, it would be good to " +"update this section to reflect that." +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:401 +msgid "" +"On the PC, peripherals that want to do bus-mastering DMA must deal with " +"physical addresses. This is a problem since FreeBSD uses virtual memory and " +"deals almost exclusively with virtual addresses. Fortunately, there is a " +"function, `vtophys()` to help." +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:406 +#, no-wrap +msgid "" +"#include <vm/vm.h>\n" +"#include <vm/pmap.h>\n" +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:408 +#, no-wrap +msgid "#define vtophys(virtual_address) (...)\n" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:411 +msgid "" +"The solution is a bit different on the alpha however, and what we really " +"want is a function called `vtobus()`." +msgstr "" + +#. type: delimited block . 4 +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:419 +#, no-wrap +msgid "" +"#if defined(__alpha__)\n" +"#define vtobus(va) alpha_XXX_dmamap((vm_offset_t)va)\n" +"#else\n" +"#define vtobus(va) vtophys(va)\n" +"#endif\n" +msgstr "" + +#. type: Title === +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:421 +#, no-wrap +msgid "Deallocating Resources" +msgstr "" + +#. type: Plain text +#: documentation/content/en/books/arch-handbook/pci/_index.adoc:423 +msgid "" +"It is very important to deallocate all of the resources that were allocated " +"during `attach()`. Care must be taken to deallocate the correct stuff even " +"on a failure condition so that the system will remain usable while your " +"driver dies." +msgstr "" |