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Merge from NetBSD:

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uhci.c:	-r1.123 (and a tiny bit of -r1.92)
    uhcivar.h:	-r1.32

	date: 2000/08/13 16:18:09;  author: augustss;  state: Exp;
	Implement what in Intel-speech is known as "bandwidth
	reclamation".  It means that we continously poll USB devices
	that have a pending transfer instead of polling just once
	every ms.  This speeds up some transfers at the expense of
	using more PCI bandwidth.
This commit is contained in:
Josef Karthauser 2002-01-20 20:12:25 +00:00
parent e6f0a33e68
commit 8e65c31988
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=89591
2 changed files with 162 additions and 49 deletions
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203
sys/dev/usb/uhci.c
View File

@ -188,11 +188,15 @@ Static void uhci_abort_xfer_end(void *v);
Static void uhci_timeout(void *);
Static void uhci_lock_frames(uhci_softc_t *);
Static void uhci_unlock_frames(uhci_softc_t *);
Static void uhci_add_ctrl(uhci_softc_t *, uhci_soft_qh_t *);
Static void uhci_add_ls_ctrl(uhci_softc_t *, uhci_soft_qh_t *);
Static void uhci_add_hs_ctrl(uhci_softc_t *, uhci_soft_qh_t *);
Static void uhci_add_bulk(uhci_softc_t *, uhci_soft_qh_t *);
Static void uhci_remove_ctrl(uhci_softc_t *,uhci_soft_qh_t *);
Static void uhci_remove_ls_ctrl(uhci_softc_t *,uhci_soft_qh_t *);
Static void uhci_remove_hs_ctrl(uhci_softc_t *,uhci_soft_qh_t *);
Static void uhci_remove_bulk(uhci_softc_t *,uhci_soft_qh_t *);
Static int uhci_str(usb_string_descriptor_t *, int, char *);
Static void uhci_add_loop(uhci_softc_t *sc);
Static void uhci_rem_loop(uhci_softc_t *sc);
Static usbd_status uhci_setup_isoc(usbd_pipe_handle pipe);
Static void uhci_device_isoc_enter(usbd_xfer_handle);
@ -251,6 +255,10 @@ Static usbd_status uhci_device_setintr(uhci_softc_t *sc,
Static void uhci_device_clear_toggle(usbd_pipe_handle pipe);
Static void uhci_noop(usbd_pipe_handle pipe);
Static __inline__ uhci_soft_qh_t *uhci_find_prev_qh(uhci_soft_qh_t *,
uhci_soft_qh_t *);
#ifdef UHCI_DEBUG
Static void uhci_dump_all(uhci_softc_t *);
Static void uhci_dumpregs(uhci_softc_t *);
@ -341,6 +349,22 @@ struct usbd_pipe_methods uhci_device_isoc_methods = {
uhci_device_isoc_done,
};
Static __inline__ uhci_soft_qh_t *
uhci_find_prev_qh(uhci_soft_qh_t *pqh, uhci_soft_qh_t *sqh)
{
DPRINTFN(15,("uhci_find_prev_qh: pqh=%p sqh=%p\n", pqh, sqh));
for (; pqh->hlink != sqh; pqh = pqh->hlink) {
#if defined(DIAGNOSTIC) || defined(UHCI_DEBUG)
if (le32toh(pqh->qh.qh_hlink) & UHCI_PTR_T) {
printf("uhci_find_prev_qh: QH not found\n");
return (NULL);
}
#endif
}
return (pqh);
}
void
uhci_busreset(uhci_softc_t *sc)
{
@ -354,7 +378,7 @@ uhci_init(uhci_softc_t *sc)
{
usbd_status err;
int i, j;
uhci_soft_qh_t *csqh, *bsqh, *sqh;
uhci_soft_qh_t *clsqh, *chsqh, *bsqh, *sqh, *lsqh;
uhci_soft_td_t *std;
DPRINTFN(1,("uhci_init: start\n"));
@ -381,25 +405,59 @@ uhci_init(uhci_softc_t *sc)
UWRITE2(sc, UHCI_FRNUM, 0); /* set frame number to 0 */
UWRITE4(sc, UHCI_FLBASEADDR, DMAADDR(&sc->sc_dma, 0)); /* set frame list*/
/*
* Allocate a TD, inactive, that hangs from the last QH.
* This is to avoid a bug in the PIIX that makes it run berserk
* otherwise.
*/
std = uhci_alloc_std(sc);
if (std == NULL)
return (USBD_NOMEM);
std->link.std = NULL;
std->td.td_link = htole32(UHCI_PTR_T);
std->td.td_status = htole32(0); /* inactive */
std->td.td_token = htole32(0);
std->td.td_buffer = htole32(0);
/* Allocate the dummy QH marking the end and used for looping the QHs.*/
lsqh = uhci_alloc_sqh(sc);
if (lsqh == NULL)
return (USBD_NOMEM);
lsqh->hlink = NULL;
lsqh->qh.qh_hlink = htole32(UHCI_PTR_T); /* end of QH chain */
lsqh->elink = std;
lsqh->qh.qh_elink = htole32(std->physaddr | UHCI_PTR_TD);
sc->sc_last_qh = lsqh;
/* Allocate the dummy QH where bulk traffic will be queued. */
bsqh = uhci_alloc_sqh(sc);
if (bsqh == NULL)
return (USBD_NOMEM);
bsqh->hlink = NULL;
bsqh->qh.qh_hlink = htole32(UHCI_PTR_T); /* end of QH chain */
bsqh->hlink = lsqh;
bsqh->qh.qh_hlink = htole32(lsqh->physaddr | UHCI_PTR_QH);
bsqh->elink = NULL;
bsqh->qh.qh_elink = htole32(UHCI_PTR_T);
sc->sc_bulk_start = sc->sc_bulk_end = bsqh;
/* Allocate the dummy QH where control traffic will be queued. */
csqh = uhci_alloc_sqh(sc);
if (csqh == NULL)
/* Allocate dummy QH where high speed control traffic will be queued. */
chsqh = uhci_alloc_sqh(sc);
if (chsqh == NULL)
return (USBD_NOMEM);
csqh->hlink = bsqh;
csqh->qh.qh_hlink = htole32(bsqh->physaddr | UHCI_PTR_QH);
csqh->elink = NULL;
csqh->qh.qh_elink = htole32(UHCI_PTR_T);
sc->sc_ctl_start = sc->sc_ctl_end = csqh;
chsqh->hlink = bsqh;
chsqh->qh.qh_hlink = htole32(bsqh->physaddr | UHCI_PTR_QH);
chsqh->elink = NULL;
chsqh->qh.qh_elink = htole32(UHCI_PTR_T);
sc->sc_hctl_start = sc->sc_hctl_end = chsqh;
/* Allocate dummy QH where control traffic will be queued. */
clsqh = uhci_alloc_sqh(sc);
if (clsqh == NULL)
return (USBD_NOMEM);
clsqh->hlink = bsqh;
clsqh->qh.qh_hlink = htole32(chsqh->physaddr | UHCI_PTR_QH);
clsqh->elink = NULL;
clsqh->qh.qh_elink = htole32(UHCI_PTR_T);
sc->sc_lctl_start = sc->sc_lctl_end = clsqh;
/*
* Make all (virtual) frame list pointers point to the interrupt
@ -416,8 +474,8 @@ uhci_init(uhci_softc_t *sc)
std->td.td_status = htole32(UHCI_TD_IOS); /* iso, inactive */
std->td.td_token = htole32(0);
std->td.td_buffer = htole32(0);
sqh->hlink = csqh;
sqh->qh.qh_hlink = htole32(csqh->physaddr | UHCI_PTR_QH);
sqh->hlink = clsqh;
sqh->qh.qh_hlink = htole32(clsqh->physaddr | UHCI_PTR_QH);
sqh->elink = NULL;
sqh->qh.qh_elink = htole32(UHCI_PTR_T);
sc->sc_vframes[i].htd = std;
@ -694,7 +752,7 @@ uhci_dump_all(uhci_softc_t *sc)
uhci_dumpregs(sc);
printf("intrs=%d\n", sc->sc_bus.no_intrs);
/*printf("framelist[i].link = %08x\n", sc->sc_framelist[0].link);*/
uhci_dump_qh(sc->sc_ctl_start->qh.hlink);
uhci_dump_qh(sc->sc_lctl_start);
}
@ -844,45 +902,96 @@ uhci_free_intr_info(uhci_intr_info_t *ii)
LIST_INSERT_HEAD(&uhci_ii_free, ii, list); /* and put on free list */
}
/* Add control QH, called at splusb(). */
/*
* Let the last QH loop back to the high speed control transfer QH.
* This is what intel calls "bandwidth reclamation" and improves
* USB performance a lot for some devices.
* If we are already looping, just count it.
*/
void
uhci_add_ctrl(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
uhci_add_loop(uhci_softc_t *sc) {
if (++sc->sc_loops == 1) {
DPRINTFN(10,("uhci_start_loop: add\n"));
/* Note, we don't loop back the soft pointer. */
sc->sc_last_qh->qh.qh_hlink =
htole32(sc->sc_hctl_start->physaddr | UHCI_PTR_QH);
}
}
void
uhci_rem_loop(uhci_softc_t *sc) {
if (--sc->sc_loops == 0) {
DPRINTFN(5,("uhci_end_loop: remove\n"));
sc->sc_last_qh->qh.qh_hlink = htole32(UHCI_PTR_T);
}
}
/* Add high speed control QH, called at splusb(). */
void
uhci_add_hs_ctrl(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
{
uhci_soft_qh_t *eqh;
SPLUSBCHECK;
DPRINTFN(10, ("uhci_add_ctrl: sqh=%p\n", sqh));
eqh = sc->sc_ctl_end;
eqh = sc->sc_hctl_end;
sqh->hlink = eqh->hlink;
sqh->qh.qh_hlink = eqh->qh.qh_hlink;
eqh->hlink = sqh;
eqh->qh.qh_hlink = htole32(sqh->physaddr | UHCI_PTR_QH);
sc->sc_ctl_end = sqh;
sc->sc_hctl_end = sqh;
uhci_add_loop(sc);
}
/* Remove control QH, called at splusb(). */
/* Remove high speed control QH, called at splusb(). */
void
uhci_remove_ctrl(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
uhci_remove_hs_ctrl(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
{
uhci_soft_qh_t *pqh;
SPLUSBCHECK;
DPRINTFN(10, ("uhci_remove_ctrl: sqh=%p\n", sqh));
for (pqh = sc->sc_ctl_start; pqh->hlink != sqh; pqh=pqh->hlink)
#if defined(DIAGNOSTIC) || defined(UHCI_DEBUG)
if (le32toh(pqh->qh.qh_hlink) & UHCI_PTR_T) {
printf("uhci_remove_ctrl: QH not found\n");
return;
}
#else
;
#endif
pqh->hlink = sqh->hlink;
DPRINTFN(10, ("uhci_remove_hs_ctrl: sqh=%p\n", sqh));
uhci_rem_loop(sc);
pqh = uhci_find_prev_qh(sc->sc_hctl_start, sqh);
pqh->hlink = sqh->hlink;
pqh->qh.qh_hlink = sqh->qh.qh_hlink;
if (sc->sc_ctl_end == sqh)
sc->sc_ctl_end = pqh;
if (sc->sc_hctl_end == sqh)
sc->sc_hctl_end = pqh;
}
/* Add low speed control QH, called at splusb(). */
void
uhci_add_ls_ctrl(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
{
uhci_soft_qh_t *eqh;
SPLUSBCHECK;
DPRINTFN(10, ("uhci_add_ls_ctrl: sqh=%p\n", sqh));
eqh = sc->sc_lctl_end;
sqh->hlink = eqh->hlink;
sqh->qh.qh_hlink = eqh->qh.qh_hlink;
eqh->hlink = sqh;
eqh->qh.qh_hlink = htole32(sqh->physaddr | UHCI_PTR_QH);
sc->sc_lctl_end = sqh;
}
/* Remove low speed control QH, called at splusb(). */
void
uhci_remove_ls_ctrl(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
{
uhci_soft_qh_t *pqh;
SPLUSBCHECK;
DPRINTFN(10, ("uhci_remove_ls_ctrl: sqh=%p\n", sqh));
pqh = uhci_find_prev_qh(sc->sc_lctl_start, sqh);
pqh->hlink = sqh->hlink;
pqh->qh.qh_hlink = sqh->qh.qh_hlink;
if (sc->sc_lctl_end == sqh)
sc->sc_lctl_end = pqh;
}
/* Add bulk QH, called at splusb(). */
@ -900,6 +1009,7 @@ uhci_add_bulk(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
eqh->hlink = sqh;
eqh->qh.qh_hlink = htole32(sqh->physaddr | UHCI_PTR_QH);
sc->sc_bulk_end = sqh;
uhci_add_loop(sc);
}
/* Remove bulk QH, called at splusb(). */
@ -911,16 +1021,9 @@ uhci_remove_bulk(uhci_softc_t *sc, uhci_soft_qh_t *sqh)
SPLUSBCHECK;
DPRINTFN(10, ("uhci_remove_bulk: sqh=%p\n", sqh));
for (pqh = sc->sc_bulk_start; pqh->hlink != sqh; pqh = pqh->hlink)
#if defined(DIAGNOSTIC) || defined(UHCI_DEBUG)
if (le32toh(pqh->qh.qh_hlink) & UHCI_PTR_T) {
printf("uhci_remove_bulk: QH not found\n");
return;
}
#else
;
#endif
pqh->hlink = sqh->hlink;
uhci_rem_loop(sc);
pqh = uhci_find_prev_qh(sc->sc_bulk_start, sqh);
pqh->hlink = sqh->hlink;
pqh->qh.qh_hlink = sqh->qh.qh_hlink;
if (sc->sc_bulk_end == sqh)
sc->sc_bulk_end = pqh;
@ -1964,7 +2067,10 @@ uhci_device_request(usbd_xfer_handle xfer)
sqh->intr_info = ii;
s = splusb();
uhci_add_ctrl(sc, sqh);
if (dev->lowspeed)
uhci_add_ls_ctrl(sc, sqh);
else
uhci_add_hs_ctrl(sc, sqh);
LIST_INSERT_HEAD(&sc->sc_intrhead, ii, list);
#ifdef UHCI_DEBUG
if (uhcidebug > 12) {
@ -2378,7 +2484,10 @@ uhci_device_ctrl_done(usbd_xfer_handle xfer)
LIST_REMOVE(ii, list); /* remove from active list */
uhci_remove_ctrl(sc, upipe->u.ctl.sqh);
if (upipe->pipe.device->lowspeed)
uhci_remove_ls_ctrl(sc, upipe->u.ctl.sqh);
else
uhci_remove_hs_ctrl(sc, upipe->u.ctl.sqh);
if (upipe->u.ctl.length != 0)
uhci_free_std_chain(sc, ii->stdstart->link.std, ii->stdend);

8
sys/dev/usb/uhcivar.h
View File

@ -141,10 +141,14 @@ typedef struct uhci_softc {
usb_dma_t sc_dma;
struct uhci_vframe sc_vframes[UHCI_VFRAMELIST_COUNT];
uhci_soft_qh_t *sc_ctl_start; /* dummy QH for control */
uhci_soft_qh_t *sc_ctl_end; /* last control QH */
uhci_soft_qh_t *sc_lctl_start; /* dummy QH for low speed control */
uhci_soft_qh_t *sc_lctl_end; /* last control QH */
uhci_soft_qh_t *sc_hctl_start; /* dummy QH for high speed control */
uhci_soft_qh_t *sc_hctl_end; /* last control QH */
uhci_soft_qh_t *sc_bulk_start; /* dummy QH for bulk */
uhci_soft_qh_t *sc_bulk_end; /* last bulk transfer */
uhci_soft_qh_t *sc_last_qh; /* dummy QH at the end */
u_int32_t sc_loops; /* number of QHs that wants looping */
uhci_soft_td_t *sc_freetds; /* TD free list */
uhci_soft_qh_t *sc_freeqhs; /* QH free list */