Author: br Date: Fri Apr 13 13:23:31 2018 New Revision: 332470 URL: https://svnweb.freebsd.org/changeset/base/332470
Log: Add driver for Altera modular Scatter-Gather DMA engine (mSGDMA). Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D9619 Added: head/sys/dev/altera/msgdma/ head/sys/dev/altera/msgdma/msgdma.c (contents, props changed) head/sys/dev/altera/msgdma/msgdma.h (contents, props changed) Modified: head/sys/conf/files Modified: head/sys/conf/files ============================================================================== --- head/sys/conf/files Fri Apr 13 12:43:54 2018 (r332469) +++ head/sys/conf/files Fri Apr 13 13:23:31 2018 (r332470) @@ -831,6 +831,7 @@ dev/alpm/alpm.c optional alpm pci dev/altera/avgen/altera_avgen.c optional altera_avgen dev/altera/avgen/altera_avgen_fdt.c optional altera_avgen fdt dev/altera/avgen/altera_avgen_nexus.c optional altera_avgen +dev/altera/msgdma/msgdma.c optional altera_msgdma xdma dev/altera/sdcard/altera_sdcard.c optional altera_sdcard dev/altera/sdcard/altera_sdcard_disk.c optional altera_sdcard dev/altera/sdcard/altera_sdcard_io.c optional altera_sdcard Added: head/sys/dev/altera/msgdma/msgdma.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/dev/altera/msgdma/msgdma.c Fri Apr 13 13:23:31 2018 (r332470) @@ -0,0 +1,641 @@ +/*- + * Copyright (c) 2016-2018 Ruslan Bukin <b...@bsdpad.com> + * All rights reserved. + * + * This software was developed by SRI International and the University of + * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237 + * ("CTSRD"), as part of the DARPA CRASH research programme. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* Altera mSGDMA driver. */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_platform.h" +#include <sys/param.h> +#include <sys/endian.h> +#include <sys/systm.h> +#include <sys/conf.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/kthread.h> +#include <sys/sglist.h> +#include <sys/module.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/resource.h> +#include <sys/rman.h> + +#include <machine/bus.h> +#include <machine/fdt.h> +#include <machine/cache.h> + +#ifdef FDT +#include <dev/fdt/fdt_common.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> +#endif + +#include <dev/xdma/xdma.h> +#include "xdma_if.h" + +#include <dev/altera/msgdma/msgdma.h> + +#define MSGDMA_DEBUG +#undef MSGDMA_DEBUG + +#ifdef MSGDMA_DEBUG +#define dprintf(fmt, ...) printf(fmt, ##__VA_ARGS__) +#else +#define dprintf(fmt, ...) +#endif + +#define MSGDMA_NCHANNELS 1 + +struct msgdma_channel { + struct msgdma_softc *sc; + struct mtx mtx; + xdma_channel_t *xchan; + struct proc *p; + int used; + int index; + int idx_head; + int idx_tail; + + struct msgdma_desc **descs; + bus_dma_segment_t *descs_phys; + uint32_t descs_num; + bus_dma_tag_t dma_tag; + bus_dmamap_t *dma_map; + uint32_t map_descr; + uint8_t map_err; + uint32_t descs_used_count; +}; + +struct msgdma_softc { + device_t dev; + struct resource *res[3]; + bus_space_tag_t bst; + bus_space_handle_t bsh; + bus_space_tag_t bst_d; + bus_space_handle_t bsh_d; + void *ih; + struct msgdma_desc desc; + struct msgdma_channel channels[MSGDMA_NCHANNELS]; +}; + +static struct resource_spec msgdma_spec[] = { + { SYS_RES_MEMORY, 0, RF_ACTIVE }, + { SYS_RES_MEMORY, 1, RF_ACTIVE }, + { SYS_RES_IRQ, 0, RF_ACTIVE }, + { -1, 0 } +}; + +#define HWTYPE_NONE 0 +#define HWTYPE_STD 1 + +static struct ofw_compat_data compat_data[] = { + { "altr,msgdma-16.0", HWTYPE_STD }, + { "altr,msgdma-1.0", HWTYPE_STD }, + { NULL, HWTYPE_NONE }, +}; + +static int msgdma_probe(device_t dev); +static int msgdma_attach(device_t dev); +static int msgdma_detach(device_t dev); + +static inline uint32_t +msgdma_next_desc(struct msgdma_channel *chan, uint32_t curidx) +{ + + return ((curidx + 1) % chan->descs_num); +} + +static void +msgdma_intr(void *arg) +{ + xdma_transfer_status_t status; + struct xdma_transfer_status st; + struct msgdma_desc *desc; + struct msgdma_channel *chan; + struct xdma_channel *xchan; + struct msgdma_softc *sc; + uint32_t tot_copied; + + sc = arg; + chan = &sc->channels[0]; + xchan = chan->xchan; + + dprintf("%s(%d): status 0x%08x next_descr 0x%08x, control 0x%08x\n", + __func__, device_get_unit(sc->dev), + READ4_DESC(sc, PF_STATUS), + READ4_DESC(sc, PF_NEXT_LO), + READ4_DESC(sc, PF_CONTROL)); + + tot_copied = 0; + + while (chan->idx_tail != chan->idx_head) { + dprintf("%s: idx_tail %d idx_head %d\n", __func__, + chan->idx_tail, chan->idx_head); + bus_dmamap_sync(chan->dma_tag, chan->dma_map[chan->idx_tail], + BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); + + desc = chan->descs[chan->idx_tail]; + if ((le32toh(desc->control) & CONTROL_OWN) != 0) { + break; + } + + tot_copied += le32toh(desc->transferred); + st.error = 0; + st.transferred = le32toh(desc->transferred); + xchan_seg_done(xchan, &st); + + chan->idx_tail = msgdma_next_desc(chan, chan->idx_tail); + atomic_subtract_int(&chan->descs_used_count, 1); + } + + WRITE4_DESC(sc, PF_STATUS, PF_STATUS_IRQ); + + /* Finish operation */ + status.error = 0; + status.transferred = tot_copied; + xdma_callback(chan->xchan, &status); +} + +static int +msgdma_reset(struct msgdma_softc *sc) +{ + int timeout; + + dprintf("%s: read status: %x\n", __func__, READ4(sc, 0x00)); + dprintf("%s: read control: %x\n", __func__, READ4(sc, 0x04)); + dprintf("%s: read 1: %x\n", __func__, READ4(sc, 0x08)); + dprintf("%s: read 2: %x\n", __func__, READ4(sc, 0x0C)); + + WRITE4(sc, DMA_CONTROL, CONTROL_RESET); + + timeout = 100; + do { + if ((READ4(sc, DMA_STATUS) & STATUS_RESETTING) == 0) + break; + } while (timeout--); + + dprintf("timeout %d\n", timeout); + + if (timeout == 0) + return (-1); + + dprintf("%s: read control after reset: %x\n", + __func__, READ4(sc, DMA_CONTROL)); + + return (0); +} + +static int +msgdma_probe(device_t dev) +{ + int hwtype; + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + hwtype = ofw_bus_search_compatible(dev, compat_data)->ocd_data; + if (hwtype == HWTYPE_NONE) + return (ENXIO); + + device_set_desc(dev, "Altera mSGDMA"); + + return (BUS_PROBE_DEFAULT); +} + +static int +msgdma_attach(device_t dev) +{ + struct msgdma_softc *sc; + phandle_t xref, node; + int err; + + sc = device_get_softc(dev); + sc->dev = dev; + + if (bus_alloc_resources(dev, msgdma_spec, sc->res)) { + device_printf(dev, "could not allocate resources for device\n"); + return (ENXIO); + } + + /* CSR memory interface */ + sc->bst = rman_get_bustag(sc->res[0]); + sc->bsh = rman_get_bushandle(sc->res[0]); + + /* Descriptor memory interface */ + sc->bst_d = rman_get_bustag(sc->res[1]); + sc->bsh_d = rman_get_bushandle(sc->res[1]); + + /* Setup interrupt handler */ + err = bus_setup_intr(dev, sc->res[2], INTR_TYPE_MISC | INTR_MPSAFE, + NULL, msgdma_intr, sc, &sc->ih); + if (err) { + device_printf(dev, "Unable to alloc interrupt resource.\n"); + return (ENXIO); + } + + node = ofw_bus_get_node(dev); + xref = OF_xref_from_node(node); + OF_device_register_xref(xref, dev); + + if (msgdma_reset(sc) != 0) + return (-1); + + WRITE4(sc, DMA_CONTROL, CONTROL_GIEM); + + return (0); +} + +static int +msgdma_detach(device_t dev) +{ + struct msgdma_softc *sc; + + sc = device_get_softc(dev); + + return (0); +} + +static void +msgdma_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err) +{ + struct msgdma_channel *chan; + + chan = (struct msgdma_channel *)arg; + KASSERT(chan != NULL, ("xchan is NULL")); + + if (err) { + chan->map_err = 1; + return; + } + + chan->descs_phys[chan->map_descr].ds_addr = segs[0].ds_addr; + chan->descs_phys[chan->map_descr].ds_len = segs[0].ds_len; + + dprintf("map desc %d: descs phys %lx len %ld\n", + chan->map_descr, segs[0].ds_addr, segs[0].ds_len); +} + +static int +msgdma_desc_free(struct msgdma_softc *sc, struct msgdma_channel *chan) +{ + struct msgdma_desc *desc; + int nsegments; + int i; + + nsegments = chan->descs_num; + + for (i = 0; i < nsegments; i++) { + desc = chan->descs[i]; + bus_dmamap_unload(chan->dma_tag, chan->dma_map[i]); + bus_dmamem_free(chan->dma_tag, desc, chan->dma_map[i]); + } + + bus_dma_tag_destroy(chan->dma_tag); + free(chan->descs, M_DEVBUF); + free(chan->dma_map, M_DEVBUF); + free(chan->descs_phys, M_DEVBUF); + + return (0); +} + +static int +msgdma_desc_alloc(struct msgdma_softc *sc, struct msgdma_channel *chan, + uint32_t desc_size, uint32_t align) +{ + int nsegments; + int err; + int i; + + nsegments = chan->descs_num; + + dprintf("%s: nseg %d\n", __func__, nsegments); + + err = bus_dma_tag_create( + bus_get_dma_tag(sc->dev), + align, 0, /* alignment, boundary */ + BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ + BUS_SPACE_MAXADDR, /* highaddr */ + NULL, NULL, /* filter, filterarg */ + desc_size, 1, /* maxsize, nsegments*/ + desc_size, 0, /* maxsegsize, flags */ + NULL, NULL, /* lockfunc, lockarg */ + &chan->dma_tag); + if (err) { + device_printf(sc->dev, + "%s: Can't create bus_dma tag.\n", __func__); + return (-1); + } + + /* Descriptors. */ + chan->descs = malloc(nsegments * sizeof(struct msgdma_desc *), + M_DEVBUF, (M_WAITOK | M_ZERO)); + if (chan->descs == NULL) { + device_printf(sc->dev, + "%s: Can't allocate memory.\n", __func__); + return (-1); + } + chan->dma_map = malloc(nsegments * sizeof(bus_dmamap_t), + M_DEVBUF, (M_WAITOK | M_ZERO)); + chan->descs_phys = malloc(nsegments * sizeof(bus_dma_segment_t), + M_DEVBUF, (M_WAITOK | M_ZERO)); + + /* Allocate bus_dma memory for each descriptor. */ + for (i = 0; i < nsegments; i++) { + err = bus_dmamem_alloc(chan->dma_tag, (void **)&chan->descs[i], + BUS_DMA_WAITOK | BUS_DMA_ZERO, &chan->dma_map[i]); + if (err) { + device_printf(sc->dev, + "%s: Can't allocate memory for descriptors.\n", + __func__); + return (-1); + } + + chan->map_err = 0; + chan->map_descr = i; + err = bus_dmamap_load(chan->dma_tag, chan->dma_map[i], chan->descs[i], + desc_size, msgdma_dmamap_cb, chan, BUS_DMA_WAITOK); + if (err) { + device_printf(sc->dev, + "%s: Can't load DMA map.\n", __func__); + return (-1); + } + + if (chan->map_err != 0) { + device_printf(sc->dev, + "%s: Can't load DMA map.\n", __func__); + return (-1); + } + } + + return (0); +} + + +static int +msgdma_channel_alloc(device_t dev, struct xdma_channel *xchan) +{ + struct msgdma_channel *chan; + struct msgdma_softc *sc; + int i; + + sc = device_get_softc(dev); + + for (i = 0; i < MSGDMA_NCHANNELS; i++) { + chan = &sc->channels[i]; + if (chan->used == 0) { + chan->xchan = xchan; + xchan->chan = (void *)chan; + xchan->caps |= XCHAN_CAP_BUSDMA; + chan->index = i; + chan->sc = sc; + chan->used = 1; + chan->idx_head = 0; + chan->idx_tail = 0; + chan->descs_used_count = 0; + chan->descs_num = 1024; + + return (0); + } + } + + return (-1); +} + +static int +msgdma_channel_free(device_t dev, struct xdma_channel *xchan) +{ + struct msgdma_channel *chan; + struct msgdma_softc *sc; + + sc = device_get_softc(dev); + + chan = (struct msgdma_channel *)xchan->chan; + + msgdma_desc_free(sc, chan); + + chan->used = 0; + + return (0); +} + +static int +msgdma_channel_capacity(device_t dev, xdma_channel_t *xchan, + uint32_t *capacity) +{ + struct msgdma_channel *chan; + uint32_t c; + + chan = (struct msgdma_channel *)xchan->chan; + + /* At least one descriptor must be left empty. */ + c = (chan->descs_num - chan->descs_used_count - 1); + + *capacity = c; + + return (0); +} + +static int +msgdma_channel_submit_sg(device_t dev, struct xdma_channel *xchan, + struct xdma_sglist *sg, uint32_t sg_n) +{ + struct msgdma_channel *chan; + struct msgdma_desc *desc; + struct msgdma_softc *sc; + uint32_t src_addr_lo; + uint32_t dst_addr_lo; + uint32_t len; + uint32_t tmp; + int i; + + sc = device_get_softc(dev); + + chan = (struct msgdma_channel *)xchan->chan; + + for (i = 0; i < sg_n; i++) { + src_addr_lo = (uint32_t)sg[i].src_addr; + dst_addr_lo = (uint32_t)sg[i].dst_addr; + len = (uint32_t)sg[i].len; + + dprintf("%s: src %x dst %x len %d\n", __func__, + src_addr_lo, dst_addr_lo, len); + + desc = chan->descs[chan->idx_head]; + desc->read_lo = htole32(src_addr_lo); + desc->write_lo = htole32(dst_addr_lo); + desc->length = htole32(len); + desc->transferred = 0; + desc->status = 0; + desc->reserved = 0; + desc->control = 0; + + if (sg[i].direction == XDMA_MEM_TO_DEV) { + if (sg[i].first == 1) { + desc->control |= htole32(CONTROL_GEN_SOP); + } + + if (sg[i].last == 1) { + desc->control |= htole32(CONTROL_GEN_EOP); + desc->control |= htole32(CONTROL_TC_IRQ_EN | + CONTROL_ET_IRQ_EN | CONTROL_ERR_M); + } + } else { + desc->control |= htole32(CONTROL_END_ON_EOP | (1 << 13)); + desc->control |= htole32(CONTROL_TC_IRQ_EN | + CONTROL_ET_IRQ_EN | CONTROL_ERR_M); + } + + tmp = chan->idx_head; + + atomic_add_int(&chan->descs_used_count, 1); + chan->idx_head = msgdma_next_desc(chan, chan->idx_head); + + desc->control |= htole32(CONTROL_OWN | CONTROL_GO); + + bus_dmamap_sync(chan->dma_tag, chan->dma_map[tmp], + BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); + } + + return (0); +} + +static int +msgdma_channel_prep_sg(device_t dev, struct xdma_channel *xchan) +{ + struct msgdma_channel *chan; + struct msgdma_desc *desc; + struct msgdma_softc *sc; + uint32_t addr; + uint32_t reg; + int ret; + int i; + + sc = device_get_softc(dev); + + dprintf("%s(%d)\n", __func__, device_get_unit(dev)); + + chan = (struct msgdma_channel *)xchan->chan; + + ret = msgdma_desc_alloc(sc, chan, sizeof(struct msgdma_desc), 16); + if (ret != 0) { + device_printf(sc->dev, + "%s: Can't allocate descriptors.\n", __func__); + return (-1); + } + + for (i = 0; i < chan->descs_num; i++) { + desc = chan->descs[i]; + + if (i == (chan->descs_num - 1)) { + desc->next = htole32(chan->descs_phys[0].ds_addr); + } else { + desc->next = htole32(chan->descs_phys[i+1].ds_addr); + } + + dprintf("%s(%d): desc %d vaddr %lx next paddr %x\n", __func__, + device_get_unit(dev), i, (uint64_t)desc, le32toh(desc->next)); + } + + addr = chan->descs_phys[0].ds_addr; + WRITE4_DESC(sc, PF_NEXT_LO, addr); + WRITE4_DESC(sc, PF_NEXT_HI, 0); + WRITE4_DESC(sc, PF_POLL_FREQ, 1000); + + reg = (PF_CONTROL_GIEM | PF_CONTROL_DESC_POLL_EN); + reg |= PF_CONTROL_RUN; + WRITE4_DESC(sc, PF_CONTROL, reg); + + return (0); +} + +static int +msgdma_channel_control(device_t dev, xdma_channel_t *xchan, int cmd) +{ + struct msgdma_channel *chan; + struct msgdma_softc *sc; + + sc = device_get_softc(dev); + + chan = (struct msgdma_channel *)xchan->chan; + + switch (cmd) { + case XDMA_CMD_BEGIN: + case XDMA_CMD_TERMINATE: + case XDMA_CMD_PAUSE: + /* TODO: implement me */ + return (-1); + } + + return (0); +} + +#ifdef FDT +static int +msgdma_ofw_md_data(device_t dev, pcell_t *cells, int ncells, void **ptr) +{ + + return (0); +} +#endif + +static device_method_t msgdma_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, msgdma_probe), + DEVMETHOD(device_attach, msgdma_attach), + DEVMETHOD(device_detach, msgdma_detach), + + /* xDMA Interface */ + DEVMETHOD(xdma_channel_alloc, msgdma_channel_alloc), + DEVMETHOD(xdma_channel_free, msgdma_channel_free), + DEVMETHOD(xdma_channel_control, msgdma_channel_control), + + /* xDMA SG Interface */ + DEVMETHOD(xdma_channel_capacity, msgdma_channel_capacity), + DEVMETHOD(xdma_channel_prep_sg, msgdma_channel_prep_sg), + DEVMETHOD(xdma_channel_submit_sg, msgdma_channel_submit_sg), + +#ifdef FDT + DEVMETHOD(xdma_ofw_md_data, msgdma_ofw_md_data), +#endif + + DEVMETHOD_END +}; + +static driver_t msgdma_driver = { + "msgdma", + msgdma_methods, + sizeof(struct msgdma_softc), +}; + +static devclass_t msgdma_devclass; + +EARLY_DRIVER_MODULE(msgdma, simplebus, msgdma_driver, msgdma_devclass, 0, 0, + BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LATE); Added: head/sys/dev/altera/msgdma/msgdma.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/dev/altera/msgdma/msgdma.h Fri Apr 13 13:23:31 2018 (r332470) @@ -0,0 +1,96 @@ +/*- + * Copyright (c) 2017-2018 Ruslan Bukin <b...@bsdpad.com> + * All rights reserved. + * + * This software was developed by SRI International and the University of + * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237 + * ("CTSRD"), as part of the DARPA CRASH research programme. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/* Altera mSGDMA registers. */ +#define DMA_STATUS 0x00 +#define STATUS_RESETTING (1 << 6) +#define DMA_CONTROL 0x04 +#define CONTROL_GIEM (1 << 4) /* Global Interrupt Enable Mask */ +#define CONTROL_RESET (1 << 1) /* Reset Dispatcher */ + +/* Descriptor fields. */ +#define CONTROL_GO (1 << 31) /* Commit all the descriptor info */ +#define CONTROL_OWN (1 << 30) /* Owned by hardware (prefetcher-enabled only) */ +#define CONTROL_EDE (1 << 24) /* Early done enable */ +#define CONTROL_ERR_S 16 /* Transmit Error, Error IRQ Enable */ +#define CONTROL_ERR_M (0xff << CONTROL_ERR_S) +#define CONTROL_ET_IRQ_EN (1 << 15) /* Early Termination IRQ Enable */ +#define CONTROL_TC_IRQ_EN (1 << 14) /* Transfer Complete IRQ Enable */ +#define CONTROL_END_ON_EOP (1 << 12) /* End on EOP */ +#define CONTROL_PARK_WR (1 << 11) /* Park Writes */ +#define CONTROL_PARK_RD (1 << 10) /* Park Reads */ +#define CONTROL_GEN_EOP (1 << 9) /* Generate EOP */ +#define CONTROL_GEN_SOP (1 << 8) /* Generate SOP */ +#define CONTROL_TX_CHANNEL_S 0 /* Transmit Channel */ +#define CONTROL_TX_CHANNEL_M (0xff << CONTROL_TRANSMIT_CH_S) + +/* Prefetcher */ +#define PF_CONTROL 0x00 +#define PF_CONTROL_GIEM (1 << 3) +#define PF_CONTROL_RESET (1 << 2) +#define PF_CONTROL_DESC_POLL_EN (1 << 1) +#define PF_CONTROL_RUN (1 << 0) +#define PF_NEXT_LO 0x04 +#define PF_NEXT_HI 0x08 +#define PF_POLL_FREQ 0x0C +#define PF_STATUS 0x10 +#define PF_STATUS_IRQ (1 << 0) + +#define READ4(_sc, _reg) \ + le32toh(bus_space_read_4(_sc->bst, _sc->bsh, _reg)) +#define WRITE4(_sc, _reg, _val) \ + bus_space_write_4(_sc->bst, _sc->bsh, _reg, htole32(_val)) + +#define READ4_DESC(_sc, _reg) \ + le32toh(bus_space_read_4(_sc->bst_d, _sc->bsh_d, _reg)) +#define WRITE4_DESC(_sc, _reg, _val) \ + bus_space_write_4(_sc->bst_d, _sc->bsh_d, _reg, htole32(_val)) + +/* Prefetcher-disabled descriptor format. */ +struct msgdma_desc_nonpf { + uint32_t src_addr; + uint32_t dst_addr; + uint32_t length; + uint32_t control; +}; + +/* Prefetcher-enabled descriptor format. */ +struct msgdma_desc { + uint32_t read_lo; + uint32_t write_lo; + uint32_t length; + uint32_t next; + uint32_t transferred; + uint32_t status; + uint32_t reserved; + uint32_t control; +}; _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
