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Tune xDMA interface slightly:

Browse Source 
o Move descriptors allocation to DMA engine driver
o Add generic xdma_request() routine
o Add less-generic scatter-gather application based on xdma interface

Typical operation flow in peripheral device driver is:

1. Get xDMA controller
sc->xdma_tx = xdma_ofw_get(sc->dev, "tx");

2. Allocate virtual channel
sc->xchan_tx = xdma_channel_alloc(sc->xdma_tx, caps);

3. Setup transfer status callback
xdma_setup_intr(sc->xchan_tx, my_tx_intr, sc, &sc->ih_tx);

4. Request a transfer(s)
ret = xdma_request(sc->xchan_tx, &req);

5. Free the channel
xdma_channel_free(sc->xdma_tx);

6. Free the controller
xdma_put(sc->xdma_tx);

Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D14971
This commit is contained in:
Ruslan Bukin 2018-04-12 15:36:24 +00:00
parent e31b69ec73
commit 3d5b3b0a44
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=332435
14 changed files with 1631 additions and 515 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
sys/conf/files
View File

@ -3511,8 +3511,14 @@ wpi.fw optional wpifw \
no-obj no-implicit-rule \
clean "wpi.fw"
dev/xdma/xdma.c optional xdma
dev/xdma/xdma_if.m optional xdma
dev/xdma/xdma_bank.c optional xdma
dev/xdma/xdma_bio.c optional xdma
dev/xdma/xdma_fdt_test.c optional xdma xdma_test fdt
dev/xdma/xdma_if.m optional xdma
dev/xdma/xdma_mbuf.c optional xdma
dev/xdma/xdma_queue.c optional xdma
dev/xdma/xdma_sg.c optional xdma
dev/xdma/xdma_sglist.c optional xdma
dev/xe/if_xe.c optional xe
dev/xe/if_xe_pccard.c optional xe pccard
dev/xen/balloon/balloon.c optional xenhvm

391
sys/dev/xdma/xdma.c
View File

@ -1,5 +1,5 @@
/*-
* Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
* Copyright (c) 2016-2018 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* This software was developed by SRI International and the University of
@ -39,7 +39,6 @@ __FBSDID("$FreeBSD$");
#include <sys/queue.h>
#include <sys/kobj.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/sysctl.h>
@ -58,40 +57,28 @@ __FBSDID("$FreeBSD$");
#include <xdma_if.h>
MALLOC_DEFINE(M_XDMA, "xdma", "xDMA framework");
/*
* Multiple xDMA controllers may work with single DMA device,
* so we have global lock for physical channel management.
*/
static struct mtx xdma_mtx;
#define XDMA_LOCK() mtx_lock(&xdma_mtx)
#define XDMA_UNLOCK() mtx_unlock(&xdma_mtx)
#define XDMA_ASSERT_LOCKED() mtx_assert(&xdma_mtx, MA_OWNED)
static struct sx xdma_sx;
/*
* Per channel locks.
*/
#define XCHAN_LOCK(xchan) mtx_lock(&(xchan)->mtx_lock)
#define XCHAN_UNLOCK(xchan) mtx_unlock(&(xchan)->mtx_lock)
#define XCHAN_ASSERT_LOCKED(xchan) mtx_assert(&(xchan)->mtx_lock, MA_OWNED)
#define XDMA_LOCK() sx_xlock(&xdma_sx)
#define XDMA_UNLOCK() sx_xunlock(&xdma_sx)
#define XDMA_ASSERT_LOCKED() sx_xassert(&xdma_sx, MA_OWNED)
/*
* Allocate virtual xDMA channel.
*/
xdma_channel_t *
xdma_channel_alloc(xdma_controller_t *xdma)
xdma_channel_alloc(xdma_controller_t *xdma, uint32_t caps)
{
xdma_channel_t *xchan;
int ret;
xchan = malloc(sizeof(xdma_channel_t), M_XDMA, M_WAITOK | M_ZERO);
if (xchan == NULL) {
device_printf(xdma->dev,
"%s: Can't allocate memory for channel.\n", __func__);
return (NULL);
}
xchan->xdma = xdma;
xchan->caps = caps;
XDMA_LOCK();
@ -107,7 +94,17 @@ xdma_channel_alloc(xdma_controller_t *xdma)
}
TAILQ_INIT(&xchan->ie_handlers);
mtx_init(&xchan->mtx_lock, "xDMA", NULL, MTX_DEF);
sx_init(&xchan->sx_lock, "xDMA chan");
sx_init(&xchan->sx_qin_lock, "xDMA qin");
sx_init(&xchan->sx_qout_lock, "xDMA qout");
sx_init(&xchan->sx_bank_lock, "xDMA bank");
sx_init(&xchan->sx_proc_lock, "xDMA proc");
TAILQ_INIT(&xchan->bank);
TAILQ_INIT(&xchan->queue_in);
TAILQ_INIT(&xchan->queue_out);
TAILQ_INIT(&xchan->processing);
TAILQ_INSERT_TAIL(&xdma->channels, xchan, xchan_next);
@ -123,6 +120,7 @@ xdma_channel_free(xdma_channel_t *xchan)
int err;
xdma = xchan->xdma;
KASSERT(xdma != NULL, ("xdma is NULL"));
XDMA_LOCK();
@ -135,12 +133,16 @@ xdma_channel_free(xdma_channel_t *xchan)
return (-1);
}
if (xchan->flags & XCHAN_TYPE_SG)
xdma_channel_free_sg(xchan);
xdma_teardown_all_intr(xchan);
/* Deallocate descriptors, if any. */
xdma_desc_free(xchan);
mtx_destroy(&xchan->mtx_lock);
sx_destroy(&xchan->sx_lock);
sx_destroy(&xchan->sx_qin_lock);
sx_destroy(&xchan->sx_qout_lock);
sx_destroy(&xchan->sx_bank_lock);
sx_destroy(&xchan->sx_proc_lock);
TAILQ_REMOVE(&xdma->channels, xchan, xchan_next);
@ -152,8 +154,9 @@ xdma_channel_free(xdma_channel_t *xchan)
}
int
xdma_setup_intr(xdma_channel_t *xchan, int (*cb)(void *), void *arg,
void **ihandler)
xdma_setup_intr(xdma_channel_t *xchan,
int (*cb)(void *, xdma_transfer_status_t *),
void *arg, void **ihandler)
{
struct xdma_intr_handler *ih;
xdma_controller_t *xdma;
@ -172,22 +175,15 @@ xdma_setup_intr(xdma_channel_t *xchan, int (*cb)(void *), void *arg,
ih = malloc(sizeof(struct xdma_intr_handler),
M_XDMA, M_WAITOK | M_ZERO);
if (ih == NULL) {
device_printf(xdma->dev,
"%s: Can't allocate memory for interrupt handler.\n",
__func__);
return (-1);
}
ih->cb = cb;
ih->cb_user = arg;
XCHAN_LOCK(xchan);
TAILQ_INSERT_TAIL(&xchan->ie_handlers, ih, ih_next);
XCHAN_UNLOCK(xchan);
if (ihandler != NULL) {
if (ihandler != NULL)
*ihandler = ih;
}
return (0);
}
@ -231,324 +227,65 @@ xdma_teardown_all_intr(xdma_channel_t *xchan)
return (0);
}
static void
xdma_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err)
{
xdma_channel_t *xchan;
int i;
xchan = (xdma_channel_t *)arg;
KASSERT(xchan != NULL, ("xchan is NULL"));
if (err) {
xchan->map_err = 1;
return;
}
for (i = 0; i < nseg; i++) {
xchan->descs_phys[i].ds_addr = segs[i].ds_addr;
xchan->descs_phys[i].ds_len = segs[i].ds_len;
}
}
static int
xdma_desc_alloc_bus_dma(xdma_channel_t *xchan, uint32_t desc_size,
uint32_t align)
{
xdma_controller_t *xdma;
bus_size_t all_desc_sz;
xdma_config_t *conf;
int nsegments;
int err;
xdma = xchan->xdma;
conf = &xchan->conf;
nsegments = conf->block_num;
all_desc_sz = (nsegments * desc_size);
err = bus_dma_tag_create(
bus_get_dma_tag(xdma->dev),
align, desc_size, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
all_desc_sz, nsegments, /* maxsize, nsegments*/
desc_size, 0, /* maxsegsize, flags */
NULL, NULL, /* lockfunc, lockarg */
&xchan->dma_tag);
if (err) {
device_printf(xdma->dev,
"%s: Can't create bus_dma tag.\n", __func__);
return (-1);
}
err = bus_dmamem_alloc(xchan->dma_tag, (void **)&xchan->descs,
BUS_DMA_WAITOK | BUS_DMA_COHERENT, &xchan->dma_map);
if (err) {
device_printf(xdma->dev,
"%s: Can't allocate memory for descriptors.\n", __func__);
return (-1);
}
xchan->descs_phys = malloc(nsegments * sizeof(xdma_descriptor_t), M_XDMA,
(M_WAITOK | M_ZERO));
xchan->map_err = 0;
err = bus_dmamap_load(xchan->dma_tag, xchan->dma_map, xchan->descs,
all_desc_sz, xdma_dmamap_cb, xchan, BUS_DMA_WAITOK);
if (err) {
device_printf(xdma->dev,
"%s: Can't load DMA map.\n", __func__);
return (-1);
}
if (xchan->map_err != 0) {
device_printf(xdma->dev,
"%s: Can't load DMA map.\n", __func__);
return (-1);
}
return (0);
}
/*
* This function called by DMA controller driver.
*/
int
xdma_desc_alloc(xdma_channel_t *xchan, uint32_t desc_size, uint32_t align)
xdma_request(xdma_channel_t *xchan, struct xdma_request *req)
{
xdma_controller_t *xdma;
xdma_config_t *conf;
int ret;
XCHAN_ASSERT_LOCKED(xchan);
xdma = xchan->xdma;
if (xdma == NULL) {
device_printf(xdma->dev,
"%s: Channel was not allocated properly.\n", __func__);
return (-1);
}
if (xchan->flags & XCHAN_DESC_ALLOCATED) {
device_printf(xdma->dev,
"%s: Descriptors already allocated.\n", __func__);
return (-1);
}
KASSERT(xdma != NULL, ("xdma is NULL"));
if ((xchan->flags & XCHAN_CONFIGURED) == 0) {
device_printf(xdma->dev,
"%s: Channel has no configuration.\n", __func__);
return (-1);
}
conf = &xchan->conf;
XCHAN_UNLOCK(xchan);
ret = xdma_desc_alloc_bus_dma(xchan, desc_size, align);
XCHAN_LOCK(xchan);
ret = XDMA_CHANNEL_REQUEST(xdma->dma_dev, xchan, req);
if (ret != 0) {
device_printf(xdma->dev,
"%s: Can't allocate memory for descriptors.\n",
__func__);
"%s: Can't request a transfer.\n", __func__);
XCHAN_UNLOCK(xchan);
return (-1);
}
xchan->flags |= XCHAN_DESC_ALLOCATED;
/* We are going to write to descriptors. */
bus_dmamap_sync(xchan->dma_tag, xchan->dma_map, BUS_DMASYNC_PREWRITE);
XCHAN_UNLOCK(xchan);
return (0);
}
int
xdma_desc_free(xdma_channel_t *xchan)
{
if ((xchan->flags & XCHAN_DESC_ALLOCATED) == 0) {
/* No descriptors allocated. */
return (-1);
}
bus_dmamap_unload(xchan->dma_tag, xchan->dma_map);
bus_dmamem_free(xchan->dma_tag, xchan->descs, xchan->dma_map);
bus_dma_tag_destroy(xchan->dma_tag);
free(xchan->descs_phys, M_XDMA);
xchan->flags &= ~(XCHAN_DESC_ALLOCATED);
return (0);
}
int
xdma_prep_memcpy(xdma_channel_t *xchan, uintptr_t src_addr,
uintptr_t dst_addr, size_t len)
xdma_control(xdma_channel_t *xchan, enum xdma_command cmd)
{
xdma_controller_t *xdma;
xdma_config_t *conf;
int ret;
xdma = xchan->xdma;
KASSERT(xdma != NULL, ("xdma is NULL"));
conf = &xchan->conf;
conf->direction = XDMA_MEM_TO_MEM;
conf->src_addr = src_addr;
conf->dst_addr = dst_addr;
conf->block_len = len;
conf->block_num = 1;
xchan->flags |= (XCHAN_CONFIGURED | XCHAN_TYPE_MEMCPY);
XCHAN_LOCK(xchan);
/* Deallocate old descriptors, if any. */
xdma_desc_free(xchan);
ret = XDMA_CHANNEL_PREP_MEMCPY(xdma->dma_dev, xchan);
ret = XDMA_CHANNEL_CONTROL(xdma->dma_dev, xchan, cmd);
if (ret != 0) {
device_printf(xdma->dev,
"%s: Can't prepare memcpy transfer.\n", __func__);
XCHAN_UNLOCK(xchan);
"%s: Can't process command.\n", __func__);
return (-1);
}
if (xchan->flags & XCHAN_DESC_ALLOCATED) {
/* Driver created xDMA descriptors. */
bus_dmamap_sync(xchan->dma_tag, xchan->dma_map,
BUS_DMASYNC_POSTWRITE);
}
XCHAN_UNLOCK(xchan);
return (0);
}
int
xdma_prep_cyclic(xdma_channel_t *xchan, enum xdma_direction dir,
uintptr_t src_addr, uintptr_t dst_addr, int block_len,
int block_num, int src_width, int dst_width)
{
xdma_controller_t *xdma;
xdma_config_t *conf;
int ret;
xdma = xchan->xdma;
KASSERT(xdma != NULL, ("xdma is NULL"));
conf = &xchan->conf;
conf->direction = dir;
conf->src_addr = src_addr;
conf->dst_addr = dst_addr;
conf->block_len = block_len;
conf->block_num = block_num;
conf->src_width = src_width;
conf->dst_width = dst_width;
xchan->flags |= (XCHAN_CONFIGURED | XCHAN_TYPE_CYCLIC);
XCHAN_LOCK(xchan);
/* Deallocate old descriptors, if any. */
xdma_desc_free(xchan);
ret = XDMA_CHANNEL_PREP_CYCLIC(xdma->dma_dev, xchan);
if (ret != 0) {
device_printf(xdma->dev,
"%s: Can't prepare cyclic transfer.\n", __func__);
XCHAN_UNLOCK(xchan);
return (-1);
}
if (xchan->flags & XCHAN_DESC_ALLOCATED) {
/* Driver has created xDMA descriptors. */
bus_dmamap_sync(xchan->dma_tag, xchan->dma_map,
BUS_DMASYNC_POSTWRITE);
}
XCHAN_UNLOCK(xchan);
return (0);
}
int
xdma_begin(xdma_channel_t *xchan)
{
xdma_controller_t *xdma;
int ret;
xdma = xchan->xdma;
ret = XDMA_CHANNEL_CONTROL(xdma->dma_dev, xchan, XDMA_CMD_BEGIN);
if (ret != 0) {
device_printf(xdma->dev,
"%s: Can't begin the channel operation.\n", __func__);
return (-1);
}
return (0);
}
int
xdma_terminate(xdma_channel_t *xchan)
{
xdma_controller_t *xdma;
int ret;
xdma = xchan->xdma;
ret = XDMA_CHANNEL_CONTROL(xdma->dma_dev, xchan, XDMA_CMD_TERMINATE);
if (ret != 0) {
device_printf(xdma->dev,
"%s: Can't terminate the channel operation.\n", __func__);
return (-1);
}
return (0);
}
int
xdma_pause(xdma_channel_t *xchan)
{
xdma_controller_t *xdma;
int ret;
xdma = xchan->xdma;
ret = XDMA_CHANNEL_CONTROL(xdma->dma_dev, xchan, XDMA_CMD_PAUSE);
if (ret != 0) {
device_printf(xdma->dev,
"%s: Can't pause the channel operation.\n", __func__);
return (-1);
}
return (ret);
}
int
xdma_callback(xdma_channel_t *xchan)
{
struct xdma_intr_handler *ih_tmp;
struct xdma_intr_handler *ih;
TAILQ_FOREACH_SAFE(ih, &xchan->ie_handlers, ih_next, ih_tmp) {
if (ih->cb != NULL) {
ih->cb(ih->cb_user);
}
}
return (0);
}
void
xdma_assert_locked(void)
xdma_callback(xdma_channel_t *xchan, xdma_transfer_status_t *status)
{
struct xdma_intr_handler *ih_tmp;
struct xdma_intr_handler *ih;
xdma_controller_t *xdma;
XDMA_ASSERT_LOCKED();
xdma = xchan->xdma;
KASSERT(xdma != NULL, ("xdma is NULL"));
TAILQ_FOREACH_SAFE(ih, &xchan->ie_handlers, ih_next, ih_tmp)
if (ih->cb != NULL)
ih->cb(ih->cb_user, status);
if (xchan->flags & XCHAN_TYPE_SG)
xdma_queue_submit(xchan);
}
#ifdef FDT
@ -560,7 +297,8 @@ xdma_ofw_md_data(xdma_controller_t *xdma, pcell_t *cells, int ncells)
{
uint32_t ret;
ret = XDMA_OFW_MD_DATA(xdma->dma_dev, cells, ncells, (void **)&xdma->data);
ret = XDMA_OFW_MD_DATA(xdma->dma_dev,
cells, ncells, (void **)&xdma->data);
return (ret);
}
@ -581,10 +319,9 @@ xdma_ofw_get(device_t dev, const char *prop)
int idx;
node = ofw_bus_get_node(dev);
if (node <= 0) {
if (node <= 0)
device_printf(dev,
"%s called on not ofw based device.\n", __func__);
}
error = ofw_bus_parse_xref_list_get_length(node,
"dmas", "#dma-cells", &ndmas);
@ -622,12 +359,8 @@ xdma_ofw_get(device_t dev, const char *prop)
return (NULL);
}
xdma = malloc(sizeof(struct xdma_controller), M_XDMA, M_WAITOK | M_ZERO);
if (xdma == NULL) {
device_printf(dev,
"%s can't allocate memory for xdma.\n", __func__);
return (NULL);
}
xdma = malloc(sizeof(struct xdma_controller),
M_XDMA, M_WAITOK | M_ZERO);
xdma->dev = dev;
xdma->dma_dev = dma_dev;
@ -667,7 +400,7 @@ static void
xdma_init(void)
{
mtx_init(&xdma_mtx, "xDMA", NULL, MTX_DEF);
sx_init(&xdma_sx, "xDMA");
}
SYSINIT(xdma, SI_SUB_DRIVERS, SI_ORDER_FIRST, xdma_init, NULL);

244
sys/dev/xdma/xdma.h
View File

@ -1,5 +1,5 @@
/*-
* Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
* Copyright (c) 2016-2018 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* This software was developed by SRI International and the University of
@ -30,8 +30,10 @@
* $FreeBSD$
*/
#ifndef _DEV_EXTRES_XDMA_H_
#define _DEV_EXTRES_XDMA_H_
#ifndef _DEV_XDMA_XDMA_H_
#define _DEV_XDMA_XDMA_H_
#include <sys/proc.h>
enum xdma_direction {
XDMA_MEM_TO_MEM,
@ -42,17 +44,31 @@ enum xdma_direction {
enum xdma_operation_type {
XDMA_MEMCPY,
XDMA_SG,
XDMA_CYCLIC,
XDMA_FIFO,
XDMA_SG,
};
enum xdma_request_type {
XR_TYPE_PHYS,
XR_TYPE_VIRT,
XR_TYPE_MBUF,
XR_TYPE_BIO,
};
enum xdma_command {
XDMA_CMD_BEGIN,
XDMA_CMD_PAUSE,
XDMA_CMD_TERMINATE,
XDMA_CMD_TERMINATE_ALL,
};
struct xdma_transfer_status {
uint32_t transferred;
int error;
};
typedef struct xdma_transfer_status xdma_transfer_status_t;
struct xdma_controller {
device_t dev; /* DMA consumer device_t. */
device_t dma_dev; /* A real DMA device_t. */
@ -64,85 +80,185 @@ struct xdma_controller {
typedef struct xdma_controller xdma_controller_t;
struct xdma_channel_config {
enum xdma_direction direction;
uintptr_t src_addr; /* Physical address. */
uintptr_t dst_addr; /* Physical address. */
int block_len; /* In bytes. */
int block_num; /* Count of blocks. */
int src_width; /* In bytes. */
int dst_width; /* In bytes. */
struct xchan_buf {
bus_dmamap_t map;
uint32_t nsegs;
uint32_t nsegs_left;
void *cbuf;
};
typedef struct xdma_channel_config xdma_config_t;
struct xdma_descriptor {
bus_addr_t ds_addr;
bus_size_t ds_len;
struct xdma_request {
struct mbuf *m;
struct bio *bp;
enum xdma_operation_type operation;
enum xdma_request_type req_type;
enum xdma_direction direction;
bus_addr_t src_addr;
bus_addr_t dst_addr;
uint8_t src_width;
uint8_t dst_width;
bus_size_t block_num;
bus_size_t block_len;
xdma_transfer_status_t status;
void *user;
TAILQ_ENTRY(xdma_request) xr_next;
struct xchan_buf buf;
};
typedef struct xdma_descriptor xdma_descriptor_t;
struct xdma_sglist {
bus_addr_t src_addr;
bus_addr_t dst_addr;
size_t len;
uint8_t src_width;
uint8_t dst_width;
enum xdma_direction direction;
bool first;
bool last;
};
struct xdma_channel {
xdma_controller_t *xdma;
xdma_config_t conf;
uint8_t flags;
#define XCHAN_DESC_ALLOCATED (1 << 0)
#define XCHAN_CONFIGURED (1 << 1)
#define XCHAN_TYPE_CYCLIC (1 << 2)
#define XCHAN_TYPE_MEMCPY (1 << 3)
uint32_t flags;
#define XCHAN_BUFS_ALLOCATED (1 << 0)
#define XCHAN_SGLIST_ALLOCATED (1 << 1)
#define XCHAN_CONFIGURED (1 << 2)
#define XCHAN_TYPE_CYCLIC (1 << 3)
#define XCHAN_TYPE_MEMCPY (1 << 4)
#define XCHAN_TYPE_FIFO (1 << 5)
#define XCHAN_TYPE_SG (1 << 6)
uint32_t caps;
#define XCHAN_CAP_BUSDMA (1 << 0)
#define XCHAN_CAP_BUSDMA_NOSEG (1 << 1)
/* A real hardware driver channel. */
void *chan;
/* Interrupt handlers. */
TAILQ_HEAD(, xdma_intr_handler) ie_handlers;
/* Descriptors. */
bus_dma_tag_t dma_tag;
bus_dmamap_t dma_map;
void *descs;
xdma_descriptor_t *descs_phys;
uint8_t map_err;
struct mtx mtx_lock;
TAILQ_ENTRY(xdma_channel) xchan_next;
struct sx sx_lock;
struct sx sx_qin_lock;
struct sx sx_qout_lock;
struct sx sx_bank_lock;
struct sx sx_proc_lock;
/* Request queue. */
bus_dma_tag_t dma_tag_bufs;
struct xdma_request *xr_mem;
uint32_t xr_num;
/* Bus dma tag options. */
bus_size_t maxsegsize;
bus_size_t maxnsegs;
bus_size_t alignment;
bus_addr_t boundary;
bus_addr_t lowaddr;
bus_addr_t highaddr;
struct xdma_sglist *sg;
TAILQ_HEAD(, xdma_request) bank;
TAILQ_HEAD(, xdma_request) queue_in;
TAILQ_HEAD(, xdma_request) queue_out;
TAILQ_HEAD(, xdma_request) processing;
};
typedef struct xdma_channel xdma_channel_t;
/* xDMA controller alloc/free */
xdma_controller_t *xdma_ofw_get(device_t dev, const char *prop);
int xdma_put(xdma_controller_t *xdma);
xdma_channel_t * xdma_channel_alloc(xdma_controller_t *);
int xdma_channel_free(xdma_channel_t *);
int xdma_prep_cyclic(xdma_channel_t *, enum xdma_direction,
uintptr_t, uintptr_t, int, int, int, int);
int xdma_prep_memcpy(xdma_channel_t *, uintptr_t, uintptr_t, size_t len);
int xdma_desc_alloc(xdma_channel_t *, uint32_t, uint32_t);
int xdma_desc_free(xdma_channel_t *xchan);
/* Channel Control */
int xdma_begin(xdma_channel_t *xchan);
int xdma_pause(xdma_channel_t *xchan);
int xdma_terminate(xdma_channel_t *xchan);
/* Interrupt callback */
int xdma_setup_intr(xdma_channel_t *xchan, int (*cb)(void *), void *arg, void **);
int xdma_teardown_intr(xdma_channel_t *xchan, struct xdma_intr_handler *ih);
int xdma_teardown_all_intr(xdma_channel_t *xchan);
int xdma_callback(struct xdma_channel *xchan);
void xdma_assert_locked(void);
struct xdma_intr_handler {
int (*cb)(void *);
void *cb_user;
struct mtx ih_lock;
int (*cb)(void *cb_user, xdma_transfer_status_t *status);
void *cb_user;
TAILQ_ENTRY(xdma_intr_handler) ih_next;
};
#endif /* !_DEV_EXTRES_XDMA_H_ */
static MALLOC_DEFINE(M_XDMA, "xdma", "xDMA framework");
#define XCHAN_LOCK(xchan) sx_xlock(&(xchan)->sx_lock)
#define XCHAN_UNLOCK(xchan) sx_xunlock(&(xchan)->sx_lock)
#define XCHAN_ASSERT_LOCKED(xchan) \
sx_assert(&(xchan)->sx_lock, SX_XLOCKED)
#define QUEUE_IN_LOCK(xchan) sx_xlock(&(xchan)->sx_qin_lock)
#define QUEUE_IN_UNLOCK(xchan) sx_xunlock(&(xchan)->sx_qin_lock)
#define QUEUE_IN_ASSERT_LOCKED(xchan) \
sx_assert(&(xchan)->sx_qin_lock, SX_XLOCKED)
#define QUEUE_OUT_LOCK(xchan) sx_xlock(&(xchan)->sx_qout_lock)
#define QUEUE_OUT_UNLOCK(xchan) sx_xunlock(&(xchan)->sx_qout_lock)
#define QUEUE_OUT_ASSERT_LOCKED(xchan) \
sx_assert(&(xchan)->sx_qout_lock, SX_XLOCKED)
#define QUEUE_BANK_LOCK(xchan) sx_xlock(&(xchan)->sx_bank_lock)
#define QUEUE_BANK_UNLOCK(xchan) sx_xunlock(&(xchan)->sx_bank_lock)
#define QUEUE_BANK_ASSERT_LOCKED(xchan) \
sx_assert(&(xchan)->sx_bank_lock, SX_XLOCKED)
#define QUEUE_PROC_LOCK(xchan) sx_xlock(&(xchan)->sx_proc_lock)
#define QUEUE_PROC_UNLOCK(xchan) sx_xunlock(&(xchan)->sx_proc_lock)
#define QUEUE_PROC_ASSERT_LOCKED(xchan) \
sx_assert(&(xchan)->sx_proc_lock, SX_XLOCKED)
#define XDMA_SGLIST_MAXLEN 2048
#define XDMA_MAX_SEG 128
/* xDMA controller ops */
xdma_controller_t *xdma_ofw_get(device_t dev, const char *prop);
int xdma_put(xdma_controller_t *xdma);
/* xDMA channel ops */
xdma_channel_t * xdma_channel_alloc(xdma_controller_t *, uint32_t caps);
int xdma_channel_free(xdma_channel_t *);
int xdma_request(xdma_channel_t *xchan, struct xdma_request *r);
/* SG interface */
int xdma_prep_sg(xdma_channel_t *, uint32_t,
bus_size_t, bus_size_t, bus_size_t, bus_addr_t, bus_addr_t, bus_addr_t);
void xdma_channel_free_sg(xdma_channel_t *xchan);
int xdma_queue_submit_sg(xdma_channel_t *xchan);
void xchan_seg_done(xdma_channel_t *xchan, xdma_transfer_status_t *);
/* Queue operations */
int xdma_dequeue_mbuf(xdma_channel_t *xchan, struct mbuf **m,
xdma_transfer_status_t *);
int xdma_enqueue_mbuf(xdma_channel_t *xchan, struct mbuf **m, uintptr_t addr,
uint8_t, uint8_t, enum xdma_direction dir);
int xdma_dequeue_bio(xdma_channel_t *xchan, struct bio **bp,
xdma_transfer_status_t *status);
int xdma_enqueue_bio(xdma_channel_t *xchan, struct bio **bp, bus_addr_t addr,
uint8_t, uint8_t, enum xdma_direction dir);
int xdma_dequeue(xdma_channel_t *xchan, void **user,
xdma_transfer_status_t *status);
int xdma_enqueue(xdma_channel_t *xchan, uintptr_t src, uintptr_t dst,
uint8_t, uint8_t, bus_size_t, enum xdma_direction dir, void *);
int xdma_queue_submit(xdma_channel_t *xchan);
/* Mbuf operations */
uint32_t xdma_mbuf_defrag(xdma_channel_t *xchan, struct xdma_request *xr);
uint32_t xdma_mbuf_chain_count(struct mbuf *m0);
/* Channel Control */
int xdma_control(xdma_channel_t *xchan, enum xdma_command cmd);
/* Interrupt callback */
int xdma_setup_intr(xdma_channel_t *xchan, int (*cb)(void *,
xdma_transfer_status_t *), void *arg, void **);
int xdma_teardown_intr(xdma_channel_t *xchan, struct xdma_intr_handler *ih);
int xdma_teardown_all_intr(xdma_channel_t *xchan);
void xdma_callback(struct xdma_channel *xchan, xdma_transfer_status_t *status);
/* Sglist */
int xchan_sglist_alloc(xdma_channel_t *xchan);
void xchan_sglist_free(xdma_channel_t *xchan);
int xdma_sglist_add(struct xdma_sglist *sg, struct bus_dma_segment *seg,
uint32_t nsegs, struct xdma_request *xr);
/* Requests bank */
void xchan_bank_init(xdma_channel_t *xchan);
int xchan_bank_free(xdma_channel_t *xchan);
struct xdma_request * xchan_bank_get(xdma_channel_t *xchan);
int xchan_bank_put(xdma_channel_t *xchan, struct xdma_request *xr);
#endif /* !_DEV_XDMA_XDMA_H_ */

99
sys/dev/xdma/xdma_bank.c Normal file
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@ -0,0 +1,99 @@
/*-
* Copyright (c) 2018 Ruslan Bukin <br@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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/sx.h>
#include <machine/bus.h>
#include <dev/xdma/xdma.h>
void
xchan_bank_init(xdma_channel_t *xchan)
{
struct xdma_request *xr;
xdma_controller_t *xdma;
int i;
xdma = xchan->xdma;
KASSERT(xdma != NULL, ("xdma is NULL"));
xchan->xr_mem = malloc(sizeof(struct xdma_request) * xchan->xr_num,
M_XDMA, M_WAITOK | M_ZERO);
for (i = 0; i < xchan->xr_num; i++) {
xr = &xchan->xr_mem[i];
TAILQ_INSERT_TAIL(&xchan->bank, xr, xr_next);
}
}
int
xchan_bank_free(xdma_channel_t *xchan)
{
free(xchan->xr_mem, M_XDMA);
return (0);
}
struct xdma_request *
xchan_bank_get(xdma_channel_t *xchan)
{
struct xdma_request *xr;
struct xdma_request *xr_tmp;
QUEUE_BANK_LOCK(xchan);
TAILQ_FOREACH_SAFE(xr, &xchan->bank, xr_next, xr_tmp) {
TAILQ_REMOVE(&xchan->bank, xr, xr_next);
break;
}
QUEUE_BANK_UNLOCK(xchan);
return (xr);
}
int
xchan_bank_put(xdma_channel_t *xchan, struct xdma_request *xr)
{
QUEUE_BANK_LOCK(xchan);
TAILQ_INSERT_TAIL(&xchan->bank, xr, xr_next);
QUEUE_BANK_UNLOCK(xchan);
return (0);
}

105
sys/dev/xdma/xdma_bio.c Normal file
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@ -0,0 +1,105 @@
/*-
* Copyright (c) 2017-2018 Ruslan Bukin <br@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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/sx.h>
#include <machine/bus.h>
#include <dev/xdma/xdma.h>
int
xdma_dequeue_bio(xdma_channel_t *xchan, struct bio **bp,
xdma_transfer_status_t *status)
{
struct xdma_request *xr_tmp;
struct xdma_request *xr;
QUEUE_OUT_LOCK(xchan);
TAILQ_FOREACH_SAFE(xr, &xchan->queue_out, xr_next, xr_tmp) {
TAILQ_REMOVE(&xchan->queue_out, xr, xr_next);
break;
}
QUEUE_OUT_UNLOCK(xchan);
if (xr == NULL)
return (-1);
*bp = xr->bp;
status->error = xr->status.error;
status->transferred = xr->status.transferred;
xchan_bank_put(xchan, xr);
return (0);
}
int
xdma_enqueue_bio(xdma_channel_t *xchan, struct bio **bp,
bus_addr_t addr, uint8_t src_width, uint8_t dst_width,
enum xdma_direction dir)
{
struct xdma_request *xr;
xdma_controller_t *xdma;
xdma = xchan->xdma;
xr = xchan_bank_get(xchan);
if (xr == NULL)
return (-1); /* No space is available yet. */
xr->direction = dir;
xr->bp = *bp;
xr->req_type = XR_TYPE_BIO;
xr->src_width = src_width;
xr->dst_width = dst_width;
if (dir == XDMA_MEM_TO_DEV) {
xr->dst_addr = addr;
xr->src_addr = 0;
} else {
xr->dst_addr = 0;
xr->src_addr = addr;
}
QUEUE_IN_LOCK(xchan);
TAILQ_INSERT_TAIL(&xchan->queue_in, xr, xr_next);
QUEUE_IN_UNLOCK(xchan);
return (0);
}

20
sys/dev/xdma/xdma_fdt_test.c
View File

@ -82,6 +82,7 @@ struct xdmatest_softc {
struct mtx mtx;
int done;
struct proc *newp;
struct xdma_request req;
};
static int xdmatest_probe(device_t dev);
@ -232,8 +233,16 @@ xdmatest_test(struct xdmatest_softc *sc)
sc->dst[i] = 0;
}
/* Configure channel for memcpy transfer. */
err = xdma_prep_memcpy(sc->xchan, sc->src_phys, sc->dst_phys, sc->len);
sc->req.type = XR_TYPE_PHYS_ADDR;
sc->req.direction = XDMA_MEM_TO_MEM;
sc->req.src_addr = sc->src_phys;
sc->req.dst_addr = sc->dst_phys;
sc->req.src_width = 4;
sc->req.dst_width = 4;
sc->req.block_len = sc->len;
sc->req.block_num = 1;
err = xdma_request(sc->xchan, sc->src_phys, sc->dst_phys, sc->len);
if (err != 0) {
device_printf(sc->dev, "Can't configure virtual channel.\n");
return (-1);
@ -297,7 +306,12 @@ xdmatest_worker(void *arg)
mtx_lock(&sc->mtx);
xdmatest_test(sc);
if (xdmatest_test(sc) != 0) {
mtx_unlock(&sc->mtx);
device_printf(sc->dev,
"%s: Test failed.\n", __func__);
break;
}
timeout = 100;

37
sys/dev/xdma/xdma_if.m
View File

@ -1,5 +1,5 @@
#-
# Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
# Copyright (c) 2016-2018 Ruslan Bukin <br@bsdpad.com>
# All rights reserved.
#
# This software was developed by SRI International and the University of
@ -43,19 +43,40 @@
INTERFACE xdma;
#
# Prepare a channel for cyclic transfer.
# Request a transfer.
#
METHOD int channel_prep_cyclic {
METHOD int channel_request {
device_t dev;
struct xdma_channel *xchan;
struct xdma_request *req;
};
#
# Prepare xDMA channel for a scatter-gather transfer.
#
METHOD int channel_prep_sg {
device_t dev;
struct xdma_channel *xchan;
};
#
# Prepare a channel for memcpy transfer.
# Query DMA engine driver for the amount of free entries
# (descriptors) are available.
#
METHOD int channel_prep_memcpy {
device_t dev;
struct xdma_channel *xchan;
METHOD int channel_capacity {
device_t dev;
struct xdma_channel *xchan;
uint32_t *capacity;
};
#
# Submit sglist list to DMA engine driver.
#
METHOD int channel_submit_sg {
device_t dev;
struct xdma_channel *xchan;
struct xdma_sglist *sg;
uint32_t sg_n;
};
#
@ -77,7 +98,7 @@ METHOD int channel_alloc {
};
#
# Free the channel, including descriptors.
# Free the real hardware channel.
#
METHOD int channel_free {
device_t dev;

154
sys/dev/xdma/xdma_mbuf.c Normal file
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@ -0,0 +1,154 @@
/*-
* Copyright (c) 2017-2018 Ruslan Bukin <br@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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/sx.h>
#include <sys/mbuf.h>
#include <machine/bus.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>
int
xdma_dequeue_mbuf(xdma_channel_t *xchan, struct mbuf **mp,
xdma_transfer_status_t *status)
{
struct xdma_request *xr;
struct xdma_request *xr_tmp;
QUEUE_OUT_LOCK(xchan);
TAILQ_FOREACH_SAFE(xr, &xchan->queue_out, xr_next, xr_tmp) {
TAILQ_REMOVE(&xchan->queue_out, xr, xr_next);
break;
}
QUEUE_OUT_UNLOCK(xchan);
if (xr == NULL)
return (-1);
*mp = xr->m;
status->error = xr->status.error;
status->transferred = xr->status.transferred;
xchan_bank_put(xchan, xr);
return (0);
}
int
xdma_enqueue_mbuf(xdma_channel_t *xchan, struct mbuf **mp,
uintptr_t addr, uint8_t src_width, uint8_t dst_width,
enum xdma_direction dir)
{
struct xdma_request *xr;
xdma_controller_t *xdma;
xdma = xchan->xdma;
xr = xchan_bank_get(xchan);
if (xr == NULL)
return (-1); /* No space is available yet. */
xr->direction = dir;
xr->m = *mp;
xr->req_type = XR_TYPE_MBUF;
if (dir == XDMA_MEM_TO_DEV) {
xr->dst_addr = addr;
xr->src_addr = 0;
} else {
xr->src_addr = addr;
xr->dst_addr = 0;
}
xr->src_width = src_width;
xr->dst_width = dst_width;
QUEUE_IN_LOCK(xchan);
TAILQ_INSERT_TAIL(&xchan->queue_in, xr, xr_next);
QUEUE_IN_UNLOCK(xchan);
return (0);
}
uint32_t
xdma_mbuf_chain_count(struct mbuf *m0)
{
struct mbuf *m;
uint32_t c;
c = 0;
for (m = m0; m != NULL; m = m->m_next)
c++;
return (c);
}
uint32_t
xdma_mbuf_defrag(xdma_channel_t *xchan, struct xdma_request *xr)
{
xdma_controller_t *xdma;
struct mbuf *m;
uint32_t c;
xdma = xchan->xdma;
c = xdma_mbuf_chain_count(xr->m);
if (c == 1)
return (c); /* Nothing to do. */
if (xchan->caps & XCHAN_CAP_BUSDMA) {
if ((xchan->caps & XCHAN_CAP_BUSDMA_NOSEG) || \
(c > xchan->maxnsegs)) {
if ((m = m_defrag(xr->m, M_NOWAIT)) == NULL) {
device_printf(xdma->dma_dev,
"%s: Can't defrag mbuf\n",
__func__);
return (c);
}
xr->m = m;
c = 1;
}
}
return (c);
}

124
sys/dev/xdma/xdma_queue.c Normal file
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@ -0,0 +1,124 @@
/*-
* Copyright (c) 2018 Ruslan Bukin <br@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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/bus_dma.h>
#include <sys/sx.h>
#include <dev/xdma/xdma.h>
int
xdma_dequeue(xdma_channel_t *xchan, void **user,
xdma_transfer_status_t *status)
{
struct xdma_request *xr_tmp;
struct xdma_request *xr;
QUEUE_OUT_LOCK(xchan);
TAILQ_FOREACH_SAFE(xr, &xchan->queue_out, xr_next, xr_tmp) {
TAILQ_REMOVE(&xchan->queue_out, xr, xr_next);
break;
}
QUEUE_OUT_UNLOCK(xchan);
if (xr == NULL)
return (-1);
*user = xr->user;
status->error = xr->status.error;
status->transferred = xr->status.transferred;
xchan_bank_put(xchan, xr);
return (0);
}
int
xdma_enqueue(xdma_channel_t *xchan, uintptr_t src, uintptr_t dst,
uint8_t src_width, uint8_t dst_width, bus_size_t len,
enum xdma_direction dir, void *user)
{
struct xdma_request *xr;
xdma_controller_t *xdma;
xdma = xchan->xdma;
KASSERT(xdma != NULL, ("xdma is NULL"));
xr = xchan_bank_get(xchan);
if (xr == NULL)
return (-1); /* No space is available. */
xr->user = user;
xr->direction = dir;
xr->m = NULL;
xr->bp = NULL;
xr->block_num = 1;
xr->block_len = len;
xr->req_type = XR_TYPE_VIRT;
xr->src_addr = src;
xr->dst_addr = dst;
xr->src_width = src_width;
xr->dst_width = dst_width;
QUEUE_IN_LOCK(xchan);
TAILQ_INSERT_TAIL(&xchan->queue_in, xr, xr_next);
QUEUE_IN_UNLOCK(xchan);
return (0);
}
int
xdma_queue_submit(xdma_channel_t *xchan)
{
xdma_controller_t *xdma;
int ret;
xdma = xchan->xdma;
KASSERT(xdma != NULL, ("xdma is NULL"));
ret = 0;
XCHAN_LOCK(xchan);
if (xchan->flags & XCHAN_TYPE_SG)
ret = xdma_queue_submit_sg(xchan);
XCHAN_UNLOCK(xchan);
return (ret);
}

595
sys/dev/xdma/xdma_sg.c Normal file
View File

@ -0,0 +1,595 @@
/*-
* Copyright (c) 2018 Ruslan Bukin <br@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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/bus_dma.h>
#include <sys/sx.h>
#include <machine/bus.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>
struct seg_load_request {
struct bus_dma_segment *seg;
uint32_t nsegs;
uint32_t error;
};
static int
_xchan_bufs_alloc(xdma_channel_t *xchan)
{
xdma_controller_t *xdma;
struct xdma_request *xr;
int i;
xdma = xchan->xdma;
for (i = 0; i < xchan->xr_num; i++) {
xr = &xchan->xr_mem[i];
xr->buf.cbuf = contigmalloc(xchan->maxsegsize,
M_XDMA, 0, 0, ~0, PAGE_SIZE, 0);
if (xr->buf.cbuf == NULL) {
device_printf(xdma->dev,
"%s: Can't allocate contiguous kernel"
" physical memory\n", __func__);
return (-1);
}
}
return (0);
}
static int
_xchan_bufs_alloc_busdma(xdma_channel_t *xchan)
{
xdma_controller_t *xdma;
struct xdma_request *xr;
int err;
int i;
xdma = xchan->xdma;
/* Create bus_dma tag */
err = bus_dma_tag_create(
bus_get_dma_tag(xdma->dev), /* Parent tag. */
xchan->alignment, /* alignment */
xchan->boundary, /* boundary */
xchan->lowaddr, /* lowaddr */
xchan->highaddr, /* highaddr */
NULL, NULL, /* filter, filterarg */
xchan->maxsegsize * xchan->maxnsegs, /* maxsize */
xchan->maxnsegs, /* nsegments */
xchan->maxsegsize, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&xchan->dma_tag_bufs);
if (err != 0) {
device_printf(xdma->dev,
"%s: Can't create bus_dma tag.\n", __func__);
return (-1);
}
for (i = 0; i < xchan->xr_num; i++) {
xr = &xchan->xr_mem[i];
err = bus_dmamap_create(xchan->dma_tag_bufs, 0,
&xr->buf.map);
if (err != 0) {
device_printf(xdma->dev,
"%s: Can't create buf DMA map.\n", __func__);
/* Cleanup. */
bus_dma_tag_destroy(xchan->dma_tag_bufs);
return (-1);
}
}
return (0);
}
static int
xchan_bufs_alloc(xdma_channel_t *xchan)
{
xdma_controller_t *xdma;
int ret;
xdma = xchan->xdma;
if (xdma == NULL) {
device_printf(xdma->dev,
"%s: Channel was not allocated properly.\n", __func__);
return (-1);
}
if (xchan->caps & XCHAN_CAP_BUSDMA)
ret = _xchan_bufs_alloc_busdma(xchan);
else
ret = _xchan_bufs_alloc(xchan);
if (ret != 0) {
device_printf(xdma->dev,
"%s: Can't allocate bufs.\n", __func__);
return (-1);
}
xchan->flags |= XCHAN_BUFS_ALLOCATED;
return (0);
}
static int
xchan_bufs_free(xdma_channel_t *xchan)
{
struct xdma_request *xr;
struct xchan_buf *b;
int i;
if ((xchan->flags & XCHAN_BUFS_ALLOCATED) == 0)
return (-1);
if (xchan->caps & XCHAN_CAP_BUSDMA) {
for (i = 0; i < xchan->xr_num; i++) {
xr = &xchan->xr_mem[i];
b = &xr->buf;
bus_dmamap_destroy(xchan->dma_tag_bufs, b->map);
}
bus_dma_tag_destroy(xchan->dma_tag_bufs);
} else {
for (i = 0; i < xchan->xr_num; i++) {
xr = &xchan->xr_mem[i];
contigfree(xr->buf.cbuf, xchan->maxsegsize, M_XDMA);
}
}
xchan->flags &= ~XCHAN_BUFS_ALLOCATED;
return (0);
}
void
xdma_channel_free_sg(xdma_channel_t *xchan)
{
xchan_bufs_free(xchan);
xchan_sglist_free(xchan);
xchan_bank_free(xchan);
}
/*
* Prepare xchan for a scatter-gather transfer.
* xr_num - xdma requests queue size,
* maxsegsize - maximum allowed scatter-gather list element size in bytes
*/
int
xdma_prep_sg(xdma_channel_t *xchan, uint32_t xr_num,
bus_size_t maxsegsize, bus_size_t maxnsegs,
bus_size_t alignment, bus_addr_t boundary,
bus_addr_t lowaddr, bus_addr_t highaddr)
{
xdma_controller_t *xdma;
int ret;
xdma = xchan->xdma;
KASSERT(xdma != NULL, ("xdma is NULL"));
if (xchan->flags & XCHAN_CONFIGURED) {
device_printf(xdma->dev,
"%s: Channel is already configured.\n", __func__);
return (-1);
}
xchan->xr_num = xr_num;
xchan->maxsegsize = maxsegsize;
xchan->maxnsegs = maxnsegs;
xchan->alignment = alignment;
xchan->boundary = boundary;
xchan->lowaddr = lowaddr;
xchan->highaddr = highaddr;
if (xchan->maxnsegs > XDMA_MAX_SEG) {
device_printf(xdma->dev, "%s: maxnsegs is too big\n",
__func__);
return (-1);
}
xchan_bank_init(xchan);
/* Allocate sglist. */
ret = xchan_sglist_alloc(xchan);
if (ret != 0) {
device_printf(xdma->dev,
"%s: Can't allocate sglist.\n", __func__);
return (-1);
}
/* Allocate bufs. */
ret = xchan_bufs_alloc(xchan);
if (ret != 0) {
device_printf(xdma->dev,
"%s: Can't allocate bufs.\n", __func__);
/* Cleanup */
xchan_sglist_free(xchan);
xchan_bank_free(xchan);
return (-1);
}
xchan->flags |= (XCHAN_CONFIGURED | XCHAN_TYPE_SG);
XCHAN_LOCK(xchan);
ret = XDMA_CHANNEL_PREP_SG(xdma->dma_dev, xchan);
if (ret != 0) {
device_printf(xdma->dev,
"%s: Can't prepare SG transfer.\n", __func__);
XCHAN_UNLOCK(xchan);
return (-1);
}
XCHAN_UNLOCK(xchan);
return (0);
}
void
xchan_seg_done(xdma_channel_t *xchan,
struct xdma_transfer_status *st)
{
struct xdma_request *xr;
xdma_controller_t *xdma;
struct xchan_buf *b;
xdma = xchan->xdma;
xr = TAILQ_FIRST(&xchan->processing);
if (xr == NULL)
panic("request not found\n");
b = &xr->buf;
atomic_subtract_int(&b->nsegs_left, 1);
if (b->nsegs_left == 0) {
if (xchan->caps & XCHAN_CAP_BUSDMA) {
if (xr->direction == XDMA_MEM_TO_DEV)
bus_dmamap_sync(xchan->dma_tag_bufs, b->map,
BUS_DMASYNC_POSTWRITE);
else
bus_dmamap_sync(xchan->dma_tag_bufs, b->map,
BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(xchan->dma_tag_bufs, b->map);
}
xr->status.error = st->error;
xr->status.transferred = st->transferred;
QUEUE_PROC_LOCK(xchan);
TAILQ_REMOVE(&xchan->processing, xr, xr_next);
QUEUE_PROC_UNLOCK(xchan);
QUEUE_OUT_LOCK(xchan);
TAILQ_INSERT_TAIL(&xchan->queue_out, xr, xr_next);
QUEUE_OUT_UNLOCK(xchan);
}
}
static void
xdma_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
struct seg_load_request *slr;
struct bus_dma_segment *seg;
int i;
slr = arg;
seg = slr->seg;
if (error != 0) {
slr->error = error;
return;
}
slr->nsegs = nsegs;
for (i = 0; i < nsegs; i++) {
seg[i].ds_addr = segs[i].ds_addr;
seg[i].ds_len = segs[i].ds_len;
}
}
static int
_xdma_load_data_busdma(xdma_channel_t *xchan, struct xdma_request *xr,
struct bus_dma_segment *seg)
{
xdma_controller_t *xdma;
struct seg_load_request slr;
uint32_t nsegs;
void *addr;
int error;
xdma = xchan->xdma;
error = 0;
nsegs = 0;
switch (xr->req_type) {
case XR_TYPE_MBUF:
error = bus_dmamap_load_mbuf_sg(xchan->dma_tag_bufs,
xr->buf.map, xr->m, seg, &nsegs, BUS_DMA_NOWAIT);
break;
case XR_TYPE_BIO:
slr.nsegs = 0;
slr.error = 0;
slr.seg = seg;
error = bus_dmamap_load_bio(xchan->dma_tag_bufs,
xr->buf.map, xr->bp, xdma_dmamap_cb, &slr, BUS_DMA_NOWAIT);
if (slr.error != 0) {
device_printf(xdma->dma_dev,
"%s: bus_dmamap_load failed, err %d\n",
__func__, slr.error);
return (0);
}
nsegs = slr.nsegs;
break;
case XR_TYPE_VIRT:
switch (xr->direction) {
case XDMA_MEM_TO_DEV:
addr = (void *)xr->src_addr;
break;
case XDMA_DEV_TO_MEM:
addr = (void *)xr->dst_addr;
break;
default:
device_printf(xdma->dma_dev,
"%s: Direction is not supported\n", __func__);
return (0);
}
slr.nsegs = 0;
slr.error = 0;
slr.seg = seg;
error = bus_dmamap_load(xchan->dma_tag_bufs, xr->buf.map,
addr, (xr->block_len * xr->block_num),
xdma_dmamap_cb, &slr, BUS_DMA_NOWAIT);
if (slr.error != 0) {
device_printf(xdma->dma_dev,
"%s: bus_dmamap_load failed, err %d\n",
__func__, slr.error);
return (0);
}
nsegs = slr.nsegs;
break;
default:
break;
}
if (error != 0) {
if (error == ENOMEM) {
/*
* Out of memory. Try again later.
* TODO: count errors.
*/
} else
device_printf(xdma->dma_dev,
"%s: bus_dmamap_load failed with err %d\n",
__func__, error);
return (0);
}
if (xr->direction == XDMA_MEM_TO_DEV)
bus_dmamap_sync(xchan->dma_tag_bufs, xr->buf.map,
BUS_DMASYNC_PREWRITE);
else
bus_dmamap_sync(xchan->dma_tag_bufs, xr->buf.map,
BUS_DMASYNC_PREREAD);
return (nsegs);
}
static int
_xdma_load_data(xdma_channel_t *xchan, struct xdma_request *xr,
struct bus_dma_segment *seg)
{
xdma_controller_t *xdma;
struct mbuf *m;
uint32_t nsegs;
xdma = xchan->xdma;
m = xr->m;
nsegs = 1;
switch (xr->req_type) {
case XR_TYPE_MBUF:
if (xr->direction == XDMA_MEM_TO_DEV) {
m_copydata(m, 0, m->m_pkthdr.len, xr->buf.cbuf);
seg[0].ds_addr = (bus_addr_t)xr->buf.cbuf;
seg[0].ds_len = m->m_pkthdr.len;
} else {
seg[0].ds_addr = mtod(m, bus_addr_t);
seg[0].ds_len = m->m_pkthdr.len;
}
break;
case XR_TYPE_BIO:
case XR_TYPE_VIRT:
default:
panic("implement me\n");
}
return (nsegs);
}
static int
xdma_load_data(xdma_channel_t *xchan,
struct xdma_request *xr, struct bus_dma_segment *seg)
{
xdma_controller_t *xdma;
int error;
int nsegs;
xdma = xchan->xdma;
error = 0;
nsegs = 0;
if (xchan->caps & XCHAN_CAP_BUSDMA)
nsegs = _xdma_load_data_busdma(xchan, xr, seg);
else
nsegs = _xdma_load_data(xchan, xr, seg);
if (nsegs == 0)
return (0); /* Try again later. */
xr->buf.nsegs = nsegs;
xr->buf.nsegs_left = nsegs;
return (nsegs);
}
static int
xdma_process(xdma_channel_t *xchan,
struct xdma_sglist *sg)
{
struct bus_dma_segment seg[XDMA_MAX_SEG];
struct xdma_request *xr;
struct xdma_request *xr_tmp;
xdma_controller_t *xdma;
uint32_t capacity;
uint32_t n;
uint32_t c;
int nsegs;
int ret;
XCHAN_ASSERT_LOCKED(xchan);
xdma = xchan->xdma;
n = 0;
ret = XDMA_CHANNEL_CAPACITY(xdma->dma_dev, xchan, &capacity);
if (ret != 0) {
device_printf(xdma->dev,
"%s: Can't get DMA controller capacity.\n", __func__);
return (-1);
}
TAILQ_FOREACH_SAFE(xr, &xchan->queue_in, xr_next, xr_tmp) {
switch (xr->req_type) {
case XR_TYPE_MBUF:
c = xdma_mbuf_defrag(xchan, xr);
break;
case XR_TYPE_BIO:
case XR_TYPE_VIRT:
default:
c = 1;
}
if (capacity <= (c + n)) {
/*
* No space yet available for the entire
* request in the DMA engine.
*/
break;
}
if ((c + n + xchan->maxnsegs) >= XDMA_SGLIST_MAXLEN) {
/* Sglist is full. */
break;
}
nsegs = xdma_load_data(xchan, xr, seg);
if (nsegs == 0)
break;
xdma_sglist_add(&sg[n], seg, nsegs, xr);
n += nsegs;
QUEUE_IN_LOCK(xchan);
TAILQ_REMOVE(&xchan->queue_in, xr, xr_next);
QUEUE_IN_UNLOCK(xchan);
QUEUE_PROC_LOCK(xchan);
TAILQ_INSERT_TAIL(&xchan->processing, xr, xr_next);
QUEUE_PROC_UNLOCK(xchan);
}
return (n);
}
int
xdma_queue_submit_sg(xdma_channel_t *xchan)
{
struct xdma_sglist *sg;
xdma_controller_t *xdma;
uint32_t sg_n;
int ret;
xdma = xchan->xdma;
KASSERT(xdma != NULL, ("xdma is NULL"));
XCHAN_ASSERT_LOCKED(xchan);
sg = xchan->sg;
if ((xchan->flags & XCHAN_BUFS_ALLOCATED) == 0) {
device_printf(xdma->dev,
"%s: Can't submit a transfer: no bufs\n",
__func__);
return (-1);
}
sg_n = xdma_process(xchan, sg);
if (sg_n == 0)
return (0); /* Nothing to submit */
/* Now submit sglist to DMA engine driver. */
ret = XDMA_CHANNEL_SUBMIT_SG(xdma->dma_dev, xchan, sg, sg_n);
if (ret != 0) {
device_printf(xdma->dev,
"%s: Can't submit an sglist.\n", __func__);
return (-1);
}
return (0);
}

100
sys/dev/xdma/xdma_sglist.c Normal file
View File

@ -0,0 +1,100 @@
/*-
* Copyright (c) 2017-2018 Ruslan Bukin <br@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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/bus_dma.h>
#include <dev/xdma/xdma.h>
int
xchan_sglist_alloc(xdma_channel_t *xchan)
{
uint32_t sz;
if (xchan->flags & XCHAN_SGLIST_ALLOCATED)
return (-1);
sz = (sizeof(struct xdma_sglist) * XDMA_SGLIST_MAXLEN);
xchan->sg = malloc(sz, M_XDMA, M_WAITOK | M_ZERO);
xchan->flags |= XCHAN_SGLIST_ALLOCATED;
return (0);
}
void
xchan_sglist_free(xdma_channel_t *xchan)
{
if (xchan->flags & XCHAN_SGLIST_ALLOCATED)
free(xchan->sg, M_XDMA);
xchan->flags &= ~XCHAN_SGLIST_ALLOCATED;
}
int
xdma_sglist_add(struct xdma_sglist *sg, struct bus_dma_segment *seg,
uint32_t nsegs, struct xdma_request *xr)
{
int i;
if (nsegs == 0)
return (-1);
for (i = 0; i < nsegs; i++) {
sg[i].src_width = xr->src_width;
sg[i].dst_width = xr->dst_width;
if (xr->direction == XDMA_MEM_TO_DEV) {
sg[i].src_addr = seg[i].ds_addr;
sg[i].dst_addr = xr->dst_addr;
} else {
sg[i].src_addr = xr->src_addr;
sg[i].dst_addr = seg[i].ds_addr;
}
sg[i].len = seg[i].ds_len;
sg[i].direction = xr->direction;
sg[i].first = 0;
sg[i].last = 0;
}
sg[0].first = 1;
sg[nsegs - 1].last = 1;
return (0);
}

40
sys/mips/ingenic/jz4780_aic.c
View File

@ -1,5 +1,5 @@
/*-
* Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
* Copyright (c) 2016-2018 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* This software was developed by SRI International and the University of
@ -79,9 +79,12 @@ struct aic_softc {
clk_t clk_i2s;
struct aic_rate *sr;
void *ih;
int internal_codec;
/* xDMA */
struct xdma_channel *xchan;
xdma_controller_t *xdma_tx;
int internal_codec;
struct xdma_request req;
};
/* Channel registers */
@ -288,25 +291,25 @@ aicchan_setblocksize(kobj_t obj, void *data, uint32_t blocksize)
}
static int
aic_intr(void *arg)
aic_intr(void *arg, xdma_transfer_status_t *status)
{
struct sc_pcminfo *scp;
struct xdma_request *req;
xdma_channel_t *xchan;
struct sc_chinfo *ch;
struct aic_softc *sc;
xdma_config_t *conf;
int bufsize;
scp = arg;
sc = scp->sc;
ch = &scp->chan[0];
req = &sc->req;
xchan = sc->xchan;
conf = &xchan->conf;
bufsize = sndbuf_getsize(ch->buffer);
sc->pos += conf->block_len;
sc->pos += req->block_len;
if (sc->pos >= bufsize)
sc->pos -= bufsize;
@ -331,20 +334,23 @@ setup_xdma(struct sc_pcminfo *scp)
KASSERT(fmt & AFMT_16BIT, ("16-bit audio supported only."));
err = xdma_prep_cyclic(sc->xchan,
XDMA_MEM_TO_DEV, /* direction */
sc->buf_base_phys, /* src addr */
sc->aic_fifo_paddr, /* dst addr */
sndbuf_getblksz(ch->buffer), /* block len */
sndbuf_getblkcnt(ch->buffer), /* block num */
2, /* src port width */
2); /* dst port width */
sc->req.operation = XDMA_CYCLIC;
sc->req.req_type = XR_TYPE_PHYS;
sc->req.direction = XDMA_MEM_TO_DEV;
sc->req.src_addr = sc->buf_base_phys;
sc->req.dst_addr = sc->aic_fifo_paddr;
sc->req.src_width = 2;
sc->req.dst_width = 2;
sc->req.block_len = sndbuf_getblksz(ch->buffer);
sc->req.block_num = sndbuf_getblkcnt(ch->buffer);
err = xdma_request(sc->xchan, &sc->req);
if (err != 0) {
device_printf(sc->dev, "Can't configure virtual channel\n");
return (-1);
}
xdma_begin(sc->xchan);
xdma_control(sc->xchan, XDMA_CMD_BEGIN);
return (0);
}
@ -385,7 +391,7 @@ aic_stop(struct sc_pcminfo *scp)
reg &= ~(AICCR_TDMS | AICCR_ERPL);
WRITE4(sc, AICCR, reg);
xdma_terminate(sc->xchan);
xdma_control(sc->xchan, XDMA_CMD_TERMINATE);
return (0);
}
@ -686,7 +692,7 @@ aic_attach(device_t dev)
}
/* Alloc xDMA virtual channel. */
sc->xchan = xdma_channel_alloc(sc->xdma_tx);
sc->xchan = xdma_channel_alloc(sc->xdma_tx, 0);
if (sc->xchan == NULL) {
device_printf(dev, "Can't alloc virtual DMA channel.\n");
return (ENXIO);

221
sys/mips/ingenic/jz4780_pdma.c
View File

@ -1,5 +1,5 @@
/*-
* Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
* Copyright (c) 2016-2018 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* This software was developed by SRI International and the University of
@ -61,6 +61,17 @@ __FBSDID("$FreeBSD$");
#include "xdma_if.h"
#define PDMA_DEBUG
#undef PDMA_DEBUG
#ifdef PDMA_DEBUG
#define dprintf(fmt, ...) printf(fmt, ##__VA_ARGS__)
#else
#define dprintf(fmt, ...)
#endif
#define PDMA_DESC_RING_ALIGN 2048
struct pdma_softc {
device_t dev;
struct resource *res[2];
@ -76,13 +87,22 @@ struct pdma_fdt_data {
};
struct pdma_channel {
xdma_channel_t *xchan;
struct pdma_fdt_data data;
int cur_desc;
int used;
int index;
int flags;
#define CHAN_DESCR_RELINK (1 << 0)
/* Descriptors */
bus_dma_tag_t desc_tag;
bus_dmamap_t desc_map;
struct pdma_hwdesc *desc_ring;
bus_addr_t desc_ring_paddr;
/* xDMA */
xdma_channel_t *xchan;
struct xdma_request *req;
};
#define PDMA_NCHANNELS 32
@ -102,10 +122,11 @@ static int chan_start(struct pdma_softc *sc, struct pdma_channel *chan);
static void
pdma_intr(void *arg)
{
struct xdma_request *req;
xdma_transfer_status_t status;
struct pdma_channel *chan;
struct pdma_softc *sc;
xdma_channel_t *xchan;
xdma_config_t *conf;
int pending;
int i;
@ -120,7 +141,7 @@ pdma_intr(void *arg)
if (pending & (1 << i)) {
chan = &pdma_channels[i];
xchan = chan->xchan;
conf = &xchan->conf;
req = chan->req;
/* TODO: check for AR, HLT error bits here. */
@ -130,11 +151,12 @@ pdma_intr(void *arg)
if (chan->flags & CHAN_DESCR_RELINK) {
/* Enable again */
chan->cur_desc = (chan->cur_desc + 1) % \
conf->block_num;
req->block_num;
chan_start(sc, chan);
}
xdma_callback(chan->xchan);
status.error = 0;
xdma_callback(chan->xchan, &status);
}
}
}
@ -217,7 +239,9 @@ chan_start(struct pdma_softc *sc, struct pdma_channel *chan)
/* 8 byte descriptor. */
WRITE4(sc, PDMA_DCS(chan->index), DCS_DES8);
WRITE4(sc, PDMA_DDA(chan->index), xchan->descs_phys[chan->cur_desc].ds_addr);
WRITE4(sc, PDMA_DDA(chan->index),
chan->desc_ring_paddr + 8 * 4 * chan->cur_desc);
WRITE4(sc, PDMA_DDS, (1 << chan->index));
/* Channel transfer enable. */
@ -249,6 +273,64 @@ chan_stop(struct pdma_softc *sc, struct pdma_channel *chan)
return (0);
}
static void
dwc_get1paddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
if (error != 0)
return;
*(bus_addr_t *)arg = segs[0].ds_addr;
}
static int
pdma_channel_setup_descriptors(device_t dev, struct pdma_channel *chan)
{
struct pdma_softc *sc;
int error;
sc = device_get_softc(dev);
/*
* Set up TX descriptor ring, descriptors, and dma maps.
*/
error = bus_dma_tag_create(
bus_get_dma_tag(sc->dev), /* Parent tag. */
PDMA_DESC_RING_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
CHAN_DESC_SIZE, 1, /* maxsize, nsegments */
CHAN_DESC_SIZE, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&chan->desc_tag);
if (error != 0) {
device_printf(sc->dev,
"could not create TX ring DMA tag.\n");
return (-1);
}
error = bus_dmamem_alloc(chan->desc_tag, (void**)&chan->desc_ring,
BUS_DMA_COHERENT | BUS_DMA_WAITOK | BUS_DMA_ZERO,
&chan->desc_map);
if (error != 0) {
device_printf(sc->dev,
"could not allocate TX descriptor ring.\n");
return (-1);
}
error = bus_dmamap_load(chan->desc_tag, chan->desc_map,
chan->desc_ring, CHAN_DESC_SIZE, dwc_get1paddr,
&chan->desc_ring_paddr, 0);
if (error != 0) {
device_printf(sc->dev,
"could not load TX descriptor ring map.\n");
return (-1);
}
return (0);
}
static int
pdma_channel_alloc(device_t dev, struct xdma_channel *xchan)
{
@ -258,8 +340,6 @@ pdma_channel_alloc(device_t dev, struct xdma_channel *xchan)
sc = device_get_softc(dev);
xdma_assert_locked();
for (i = 0; i < PDMA_NCHANNELS; i++) {
chan = &pdma_channels[i];
if (chan->used == 0) {
@ -268,6 +348,8 @@ pdma_channel_alloc(device_t dev, struct xdma_channel *xchan)
chan->used = 1;
chan->index = i;
pdma_channel_setup_descriptors(dev, chan);
return (0);
}
}
@ -283,8 +365,6 @@ pdma_channel_free(device_t dev, struct xdma_channel *xchan)
sc = device_get_softc(dev);
xdma_assert_locked();
chan = (struct pdma_channel *)xchan->chan;
chan->used = 0;
@ -292,50 +372,13 @@ pdma_channel_free(device_t dev, struct xdma_channel *xchan)
}
static int
pdma_channel_prep_memcpy(device_t dev, struct xdma_channel *xchan)
{
struct pdma_channel *chan;
struct pdma_hwdesc *desc;
struct pdma_softc *sc;
xdma_config_t *conf;
int ret;
sc = device_get_softc(dev);
chan = (struct pdma_channel *)xchan->chan;
/* Ensure we are not in operation */
chan_stop(sc, chan);
ret = xdma_desc_alloc(xchan, sizeof(struct pdma_hwdesc), 8);
if (ret != 0) {
device_printf(sc->dev,
"%s: Can't allocate descriptors.\n", __func__);
return (-1);
}
conf = &xchan->conf;
desc = (struct pdma_hwdesc *)xchan->descs;
desc[0].dsa = conf->src_addr;
desc[0].dta = conf->dst_addr;
desc[0].drt = DRT_AUTO;
desc[0].dcm = DCM_SAI | DCM_DAI;
/* 4 byte copy for now. */
desc[0].dtc = (conf->block_len / 4);
desc[0].dcm |= DCM_SP_4 | DCM_DP_4 | DCM_TSZ_4;
desc[0].dcm |= DCM_TIE;
return (0);
}
static int
access_width(xdma_config_t *conf, uint32_t *dcm, uint32_t *max_width)
access_width(struct xdma_request *req, uint32_t *dcm, uint32_t *max_width)
{
*dcm = 0;
*max_width = max(conf->src_width, conf->dst_width);
*max_width = max(req->src_width, req->dst_width);
switch (conf->src_width) {
switch (req->src_width) {
case 1:
*dcm |= DCM_SP_1;
break;
@ -349,7 +392,7 @@ access_width(xdma_config_t *conf, uint32_t *dcm, uint32_t *max_width)
return (-1);
}
switch (conf->dst_width) {
switch (req->dst_width) {
case 1:
*dcm |= DCM_DP_1;
break;
@ -381,67 +424,66 @@ access_width(xdma_config_t *conf, uint32_t *dcm, uint32_t *max_width)
}
static int
pdma_channel_prep_cyclic(device_t dev, struct xdma_channel *xchan)
pdma_channel_request(device_t dev, struct xdma_channel *xchan, struct xdma_request *req)
{
struct pdma_fdt_data *data;
struct pdma_channel *chan;
struct pdma_hwdesc *desc;
xdma_controller_t *xdma;
struct pdma_softc *sc;
xdma_config_t *conf;
int max_width;
uint32_t reg;
uint32_t dcm;
int ret;
int i;
sc = device_get_softc(dev);
conf = &xchan->conf;
dprintf("%s: block_len %d block_num %d\n",
__func__, req->block_len, req->block_num);
xdma = xchan->xdma;
data = (struct pdma_fdt_data *)xdma->data;
ret = xdma_desc_alloc(xchan, sizeof(struct pdma_hwdesc), 8);
if (ret != 0) {
device_printf(sc->dev,
"%s: Can't allocate descriptors.\n", __func__);
return (-1);
}
chan = (struct pdma_channel *)xchan->chan;
/* Ensure we are not in operation */
chan_stop(sc, chan);
chan->flags = CHAN_DESCR_RELINK;
if (req->operation == XDMA_CYCLIC)
chan->flags = CHAN_DESCR_RELINK;
chan->cur_desc = 0;
chan->req = req;
for (i = 0; i < req->block_num; i++) {
desc = &chan->desc_ring[i];
desc = (struct pdma_hwdesc *)xchan->descs;
for (i = 0; i < conf->block_num; i++) {
if (conf->direction == XDMA_MEM_TO_DEV) {
desc[i].dsa = conf->src_addr + (i * conf->block_len);
desc[i].dta = conf->dst_addr;
desc[i].drt = data->tx;
desc[i].dcm = DCM_SAI;
} else if (conf->direction == XDMA_DEV_TO_MEM) {
desc[i].dsa = conf->src_addr;
desc[i].dta = conf->dst_addr + (i * conf->block_len);
desc[i].drt = data->rx;
desc[i].dcm = DCM_DAI;
} else if (conf->direction == XDMA_MEM_TO_MEM) {
desc[i].dsa = conf->src_addr + (i * conf->block_len);
desc[i].dta = conf->dst_addr + (i * conf->block_len);
desc[i].drt = DRT_AUTO;
desc[i].dcm = DCM_SAI | DCM_DAI;
if (req->direction == XDMA_MEM_TO_DEV) {
desc->dsa = req->src_addr + (i * req->block_len);
desc->dta = req->dst_addr;
desc->drt = data->tx;
desc->dcm = DCM_SAI;
} else if (req->direction == XDMA_DEV_TO_MEM) {
desc->dsa = req->src_addr;
desc->dta = req->dst_addr + (i * req->block_len);
desc->drt = data->rx;
desc->dcm = DCM_DAI;
} else if (req->direction == XDMA_MEM_TO_MEM) {
desc->dsa = req->src_addr + (i * req->block_len);
desc->dta = req->dst_addr + (i * req->block_len);
desc->drt = DRT_AUTO;
desc->dcm = DCM_SAI | DCM_DAI;
}
if (access_width(conf, &dcm, &max_width) != 0) {
if (access_width(req, &dcm, &max_width) != 0) {
device_printf(dev,
"%s: can't configure access width\n", __func__);
return (-1);
}
desc[i].dcm |= dcm | DCM_TIE;
desc[i].dtc = (conf->block_len / max_width);
desc->dcm |= dcm | DCM_TIE;
desc->dtc = (req->block_len / max_width);
/*
* TODO: bus dma pre read/write sync here
*/
/*
* PDMA does not provide interrupt after processing each descriptor,
@ -451,10 +493,10 @@ pdma_channel_prep_cyclic(device_t dev, struct xdma_channel *xchan)
* on each interrupt again.
*/
if ((chan->flags & CHAN_DESCR_RELINK) == 0) {
if (i != (conf->block_num - 1)) {
desc[i].dcm |= DCM_LINK;
if (i != (req->block_num - 1)) {
desc->dcm |= DCM_LINK;
reg = ((i + 1) * sizeof(struct pdma_hwdesc));
desc[i].dtc |= (reg >> 4) << 24;
desc->dtc |= (reg >> 4) << 24;
}
}
}
@ -522,8 +564,7 @@ static device_method_t pdma_methods[] = {
/* xDMA Interface */
DEVMETHOD(xdma_channel_alloc, pdma_channel_alloc),
DEVMETHOD(xdma_channel_free, pdma_channel_free),
DEVMETHOD(xdma_channel_prep_cyclic, pdma_channel_prep_cyclic),
DEVMETHOD(xdma_channel_prep_memcpy, pdma_channel_prep_memcpy),
DEVMETHOD(xdma_channel_request, pdma_channel_request),
DEVMETHOD(xdma_channel_control, pdma_channel_control),
#ifdef FDT
DEVMETHOD(xdma_ofw_md_data, pdma_ofw_md_data),

8
sys/mips/ingenic/jz4780_pdma.h
View File

@ -37,6 +37,7 @@
#define PDMA_DRT(n) (0x0C + 0x20 * n) /* Channel n Request Source */
#define DRT_AUTO (1 << 3) /* Auto-request. */
#define PDMA_DCS(n) (0x10 + 0x20 * n) /* Channel n Control/Status */
#define DCS_NDES (1 << 31) /* Non-descriptor mode. */
#define DCS_DES8 (1 << 30) /* Descriptor 8 Word. */
#define DCS_AR (1 << 4) /* Address Error. */
#define DCS_TT (1 << 3) /* Transfer Terminate. */
@ -45,21 +46,19 @@
#define PDMA_DCM(n) (0x14 + 0x20 * n) /* Channel n Command */
#define DCM_SAI (1 << 23) /* Source Address Increment. */
#define DCM_DAI (1 << 22) /* Destination Address Increment. */
#define DCM_SP_S 14 /* Source port width. */
#define DCM_SP_M (0x3 << DCM_SP_S)
#define DCM_SP_1 (0x1 << DCM_SP_S) /* 1 byte */
#define DCM_SP_2 (0x2 << DCM_SP_S) /* 2 bytes */
#define DCM_SP_4 (0x0 << DCM_SP_S) /* 4 bytes */
#define DCM_DP_S 12 /* Destination port width. */
#define DCM_DP_M (0x3 << DCM_DP_S)
#define DCM_DP_1 (0x1 << DCM_DP_S) /* 1 byte */
#define DCM_DP_2 (0x2 << DCM_DP_S) /* 2 bytes */
#define DCM_DP_4 (0x0 << DCM_DP_S) /* 4 bytes */
#define DCM_TSZ_S 8 /* Transfer Data Size of a data unit. */
#define DCM_TSZ_M (0x7 << DCM_TSZ_S)
#define DCM_TSZ_A (0x7 << DCM_TSZ_S) /* Autonomy */
#define DCM_TSZ_1 (0x1 << DCM_TSZ_S)
#define DCM_TSZ_2 (0x2 << DCM_TSZ_S)
#define DCM_TSZ_4 (0x0 << DCM_TSZ_S)
@ -105,3 +104,6 @@ struct pdma_hwdesc {
uint32_t drt; /* DMA Request Type */
uint32_t reserved[2];
};
#define CHAN_DESC_COUNT 4096
#define CHAN_DESC_SIZE (sizeof(struct pdma_hwdesc) * CHAN_DESC_COUNT)