f379992fcd
wait for the drives to become ready or missing in iaonline() and iaverify() to prevent nobootprompt= race. handle task file error status (this can happen for atapi) under some circumstances and would hang the io if not handled. preventively poll interrupts from the checkdrive kproc in case we loose interrupts (bad via machine). implement bios handoff procedure. make sure the port is idle before programming the port dma regios in configdrive(), do not start command processing on the port unless phylink has been established.
335 lines
7.1 KiB
C
335 lines
7.1 KiB
C
/*
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* advanced host controller interface (sata)
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* © 2007-9 coraid, inc
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*/
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/* pci configuration */
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enum {
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Abar = 5,
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};
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/*
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* ahci memory configuration
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*
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* 0000-0023 generic host control
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* 0024-009f reserved
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* 00a0-00ff vendor specific.
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* 0100-017f port 0
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* ...
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* 1080-1100 port 31
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*/
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/* cap bits: supported features */
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enum {
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H64a = 1<<31, /* 64-bit addressing */
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Hncq = 1<<30, /* ncq */
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Hsntf = 1<<29, /* snotification reg. */
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Hmps = 1<<28, /* mech pres switch */
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Hss = 1<<27, /* staggered spinup */
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Halp = 1<<26, /* aggressive link pm */
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Hal = 1<<25, /* activity led */
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Hclo = 1<<24, /* command-list override */
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Hiss = 1<<20, /* for interface speed */
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Ham = 1<<18, /* ahci-mode only */
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Hpm = 1<<17, /* port multiplier */
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Hfbs = 1<<16, /* fis-based switching */
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Hpmb = 1<<15, /* multiple-block pio */
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Hssc = 1<<14, /* slumber state */
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Hpsc = 1<<13, /* partial-slumber state */
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Hncs = 1<<8, /* n command slots */
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Hcccs = 1<<7, /* coal */
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Hems = 1<<6, /* enclosure mgmt. */
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Hxs = 1<<5, /* external sata */
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Hnp = 1<<0, /* n ports */
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};
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/* ghc bits */
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enum {
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Hae = 1<<31, /* enable ahci */
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Hie = 1<<1, /* " interrupts */
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Hhr = 1<<0, /* hba reset */
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};
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/* cap2 bits */
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enum {
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Apts = 1<<2, /* automatic partial to slumber */
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Nvmp = 1<<1, /* nvmhci present; nvram */
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Boh = 1<<0, /* bios/os handoff supported */
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};
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/* bios bits */
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enum {
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Bos = 1<<0,
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Oos = 1<<1,
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};
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/* emctl bits */
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enum {
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Pm = 1<<27, /* port multiplier support */
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Alhd = 1<<26, /* activity led hardware driven */
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Xonly = 1<<25, /* rx messages not supported */
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Smb = 1<<24, /* single msg buffer; rx limited */
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Esgpio = 1<<19, /* sgpio messages supported */
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Eses2 = 1<<18, /* ses-2 supported */
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Esafte = 1<<17, /* saf-te supported */
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Elmt = 1<<16, /* led msg types support */
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Emrst = 1<<9, /* reset all em logic */
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Tmsg = 1<<8, /* transmit message */
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Mr = 1<<0, /* message rx'd */
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Emtype = Esgpio | Eses2 | Esafte | Elmt,
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};
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typedef struct {
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ulong cap;
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ulong ghc;
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ulong isr;
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ulong pi; /* ports implemented */
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ulong ver;
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ulong ccc; /* coaleasing control */
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ulong cccports;
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ulong emloc;
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ulong emctl;
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ulong cap2;
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ulong bios;
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} Ahba;
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enum {
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Acpds = 1<<31, /* cold port detect status */
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Atfes = 1<<30, /* task file error status */
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Ahbfs = 1<<29, /* hba fatal */
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Ahbds = 1<<28, /* hba error (parity error) */
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Aifs = 1<<27, /* interface fatal §6.1.2 */
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Ainfs = 1<<26, /* interface error (recovered) */
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Aofs = 1<<24, /* too many bytes from disk */
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Aipms = 1<<23, /* incorrect prt mul status */
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Aprcs = 1<<22, /* PhyRdy change status Pxserr.diag.n */
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Adpms = 1<<7, /* mechanical presence status */
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Apcs = 1<<6, /* port connect diag.x */
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Adps = 1<<5, /* descriptor processed */
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Aufs = 1<<4, /* unknown fis diag.f */
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Asdbs = 1<<3, /* set device bits fis received w/ i bit set */
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Adss = 1<<2, /* dma setup */
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Apio = 1<<1, /* pio setup fis */
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Adhrs = 1<<0, /* device to host register fis */
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IEM = Acpds|Atfes|Ahbds|Ahbfs|Ahbds|Aifs|Ainfs|Aprcs|Apcs|Adps|
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Aufs|Asdbs|Adss|Adhrs,
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Ifatal = Ahbfs|Ahbds|Aifs,
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};
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/* serror bits */
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enum {
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SerrX = 1<<26, /* exchanged */
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SerrF = 1<<25, /* unknown fis */
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SerrT = 1<<24, /* transition error */
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SerrS = 1<<23, /* link sequence */
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SerrH = 1<<22, /* handshake */
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SerrC = 1<<21, /* crc */
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SerrD = 1<<20, /* not used by ahci */
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SerrB = 1<<19, /* 10-tp-8 decode */
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SerrW = 1<<18, /* comm wake */
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SerrI = 1<<17, /* phy internal */
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SerrN = 1<<16, /* phyrdy change */
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ErrE = 1<<11, /* internal */
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ErrP = 1<<10, /* ata protocol violation */
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ErrC = 1<<9, /* communication */
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ErrT = 1<<8, /* transient */
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ErrM = 1<<1, /* recoverd comm */
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ErrI = 1<<0, /* recovered data integrety */
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ErrAll = ErrE|ErrP|ErrC|ErrT|ErrM|ErrI,
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SerrAll = SerrX|SerrF|SerrT|SerrS|SerrH|SerrC|SerrD|SerrB|SerrW|
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SerrI|SerrN|ErrAll,
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SerrBad = 0x7f<<19,
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};
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/* cmd register bits */
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enum {
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Aicc = 1<<28, /* interface communcations control. 4 bits */
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Aasp = 1<<27, /* aggressive slumber & partial sleep */
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Aalpe = 1<<26, /* aggressive link pm enable */
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Adlae = 1<<25, /* drive led on atapi */
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Aatapi = 1<<24, /* device is atapi */
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Apste = 1<<23, /* automatic slumber to partial cap */
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Afbsc = 1<<22, /* fis-based switching capable */
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Aesp = 1<<21, /* external sata port */
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Acpd = 1<<20, /* cold presence detect */
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Ampsp = 1<<19, /* mechanical pres. */
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Ahpcp = 1<<18, /* hot plug capable */
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Apma = 1<<17, /* pm attached */
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Acps = 1<<16, /* cold presence state */
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Acr = 1<<15, /* cmdlist running */
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Afr = 1<<14, /* fis running */
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Ampss = 1<<13, /* mechanical presence switch state */
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Accs = 1<<8, /* current command slot 12:08 */
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Afre = 1<<4, /* fis enable receive */
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Aclo = 1<<3, /* command list override */
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Apod = 1<<2, /* power on dev (requires cold-pres. detect) */
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Asud = 1<<1, /* spin-up device; requires ss capability */
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Ast = 1<<0, /* start */
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Arun = Ast|Acr|Afre|Afr,
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Apwr = Apod|Asud,
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};
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/* ctl register bits */
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enum {
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Aipm = 1<<8, /* interface power mgmt. 3=off */
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Aspd = 1<<4,
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Adet = 1<<0, /* device detection */
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};
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/* sstatus register bits */
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enum{
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/* sstatus det */
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Smissing = 0<<0,
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Spresent = 1<<0,
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Sphylink = 3<<0,
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Sbist = 4<<0,
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Smask = 7<<0,
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/* sstatus speed */
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Gmissing = 0<<4,
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Gi = 1<<4,
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Gii = 2<<4,
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Giii = 3<<4,
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Gmask = 7<<4,
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/* sstatus ipm */
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Imissing = 0<<8,
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Iactive = 1<<8,
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Isleepy = 2<<8,
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Islumber = 6<<8,
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Imask = 7<<8,
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SImask = Smask | Imask,
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SSmask = Smask | Isleepy,
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};
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#define sstatus scr0
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#define sctl scr2
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#define serror scr1
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#define sactive scr3
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#define ntf scr4
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typedef struct {
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ulong list; /* PxCLB must be 1kb aligned */
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ulong listhi;
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ulong fis; /* 256-byte aligned */
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ulong fishi;
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ulong isr;
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ulong ie; /* interrupt enable */
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ulong cmd;
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ulong res1;
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ulong task;
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ulong sig;
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ulong scr0;
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ulong scr2;
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ulong scr1;
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ulong scr3;
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ulong ci; /* command issue */
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ulong scr4;
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ulong fbs;
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ulong res2[11];
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ulong vendor[4];
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} Aport;
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/* in host's memory; not memory mapped */
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typedef struct {
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uchar *base;
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uchar *d;
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uchar *p;
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uchar *r;
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uchar *u;
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ulong *devicebits;
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} Afis;
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enum {
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Lprdtl = 1<<16, /* physical region descriptor table len */
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Lpmp = 1<<12, /* port multiplier port */
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Lclear = 1<<10, /* clear busy on R_OK */
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Lbist = 1<<9,
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Lreset = 1<<8,
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Lpref = 1<<7, /* prefetchable */
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Lwrite = 1<<6,
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Latapi = 1<<5,
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Lcfl = 1<<0, /* command fis length in double words */
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};
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/* in hosts memory; memory mapped */
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typedef struct {
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ulong flags;
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ulong len;
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ulong ctab;
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ulong ctabhi;
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uchar reserved[16];
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} Alist;
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typedef struct {
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ulong dba;
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ulong dbahi;
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ulong pad;
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ulong count;
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} Aprdt;
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typedef struct {
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uchar cfis[0x40];
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uchar atapi[0x10];
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uchar pad[0x30];
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Aprdt prdt;
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} Actab;
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/* enclosure message header */
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enum {
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Mled = 0,
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Msafte = 1,
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Mses2 = 2,
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Msgpio = 3,
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};
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typedef struct {
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uchar dummy;
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uchar msize;
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uchar dsize;
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uchar type;
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uchar hba; /* bits 0:4 are the port */
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uchar pm;
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uchar led[2];
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} Aledmsg;
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enum {
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Aled = 1<<0,
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Locled = 1<<3,
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Errled = 1<<6,
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Ledoff = 0,
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Ledon = 1,
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};
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typedef struct {
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uint encsz;
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ulong *enctx;
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ulong *encrx;
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} Aenc;
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enum {
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Ferror = 1,
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Fdone = 2,
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};
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typedef struct {
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QLock;
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Rendez;
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uchar flag;
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Sfis;
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Afis fis;
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Alist *list;
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Actab *ctab;
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} Aportm;
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typedef struct {
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Aport *p;
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Aportm *m;
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} Aportc;
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