-/* -*- c-basic-offset: 8 -*-
+/*
+ * Isochronous IO functionality
*
- * fw-iso.c - Isochronous IO
* Copyright (C) 2006 Kristian Hoegsberg <krh@bitplanet.net>
*
* This program is free software; you can redistribute it and/or modify
#include "fw-transaction.h"
#include "fw-topology.h"
+#include "fw-device.h"
-static int
-setup_iso_buffer(struct fw_iso_context *ctx, size_t size,
- enum dma_data_direction direction)
+int
+fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
+ int page_count, enum dma_data_direction direction)
{
- struct page *page;
- int i;
- void *p;
-
- ctx->buffer_size = PAGE_ALIGN(size);
- if (size == 0)
- return 0;
-
- ctx->buffer = vmalloc_32_user(ctx->buffer_size);
- if (ctx->buffer == NULL)
- return -ENOMEM;
-
- ctx->page_count = ctx->buffer_size >> PAGE_SHIFT;
- ctx->pages =
- kzalloc(ctx->page_count * sizeof(ctx->pages[0]), GFP_KERNEL);
- if (ctx->pages == NULL) {
- vfree(ctx->buffer);
- return -ENOMEM;
+ int i, j, retval = -ENOMEM;
+ dma_addr_t address;
+
+ buffer->page_count = page_count;
+ buffer->direction = direction;
+
+ buffer->pages = kmalloc(page_count * sizeof(buffer->pages[0]),
+ GFP_KERNEL);
+ if (buffer->pages == NULL)
+ goto out;
+
+ for (i = 0; i < buffer->page_count; i++) {
+ buffer->pages[i] = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
+ if (buffer->pages[i] == NULL)
+ goto out_pages;
+
+ address = dma_map_page(card->device, buffer->pages[i],
+ 0, PAGE_SIZE, direction);
+ if (dma_mapping_error(address)) {
+ __free_page(buffer->pages[i]);
+ goto out_pages;
+ }
+ set_page_private(buffer->pages[i], address);
}
- p = ctx->buffer;
- for (i = 0; i < ctx->page_count; i++, p += PAGE_SIZE) {
- page = vmalloc_to_page(p);
- ctx->pages[i] = dma_map_page(ctx->card->device,
- page, 0, PAGE_SIZE, direction);
+ return 0;
+
+ out_pages:
+ for (j = 0; j < i; j++) {
+ address = page_private(buffer->pages[j]);
+ dma_unmap_page(card->device, address,
+ PAGE_SIZE, DMA_TO_DEVICE);
+ __free_page(buffer->pages[j]);
+ }
+ kfree(buffer->pages);
+ out:
+ buffer->pages = NULL;
+ return retval;
+}
+
+int fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma)
+{
+ unsigned long uaddr;
+ int i, retval;
+
+ uaddr = vma->vm_start;
+ for (i = 0; i < buffer->page_count; i++) {
+ retval = vm_insert_page(vma, uaddr, buffer->pages[i]);
+ if (retval)
+ return retval;
+ uaddr += PAGE_SIZE;
}
return 0;
}
-static void destroy_iso_buffer(struct fw_iso_context *ctx)
+void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer,
+ struct fw_card *card)
{
int i;
+ dma_addr_t address;
- for (i = 0; i < ctx->page_count; i++)
- dma_unmap_page(ctx->card->device, ctx->pages[i],
+ for (i = 0; i < buffer->page_count; i++) {
+ address = page_private(buffer->pages[i]);
+ dma_unmap_page(card->device, address,
PAGE_SIZE, DMA_TO_DEVICE);
+ __free_page(buffer->pages[i]);
+ }
- kfree(ctx->pages);
- vfree(ctx->buffer);
+ kfree(buffer->pages);
+ buffer->pages = NULL;
}
-struct fw_iso_context *fw_iso_context_create(struct fw_card *card, int type,
- size_t buffer_size,
- fw_iso_callback_t callback,
- void *callback_data)
+struct fw_iso_context *
+fw_iso_context_create(struct fw_card *card, int type,
+ int channel, int speed, size_t header_size,
+ fw_iso_callback_t callback, void *callback_data)
{
struct fw_iso_context *ctx;
- int retval;
- ctx = card->driver->allocate_iso_context(card, type);
+ ctx = card->driver->allocate_iso_context(card, type, header_size);
if (IS_ERR(ctx))
return ctx;
ctx->card = card;
ctx->type = type;
+ ctx->channel = channel;
+ ctx->speed = speed;
+ ctx->header_size = header_size;
ctx->callback = callback;
ctx->callback_data = callback_data;
- retval = setup_iso_buffer(ctx, buffer_size, DMA_TO_DEVICE);
- if (retval < 0) {
- card->driver->free_iso_context(ctx);
- return ERR_PTR(retval);
- }
-
return ctx;
}
-
EXPORT_SYMBOL(fw_iso_context_create);
void fw_iso_context_destroy(struct fw_iso_context *ctx)
{
struct fw_card *card = ctx->card;
- destroy_iso_buffer(ctx);
-
card->driver->free_iso_context(ctx);
}
-
EXPORT_SYMBOL(fw_iso_context_destroy);
int
-fw_iso_context_send(struct fw_iso_context *ctx,
- int channel, int speed, int cycle)
+fw_iso_context_start(struct fw_iso_context *ctx, int cycle, int sync, int tags)
{
- ctx->channel = channel;
- ctx->speed = speed;
-
- return ctx->card->driver->send_iso(ctx, cycle);
+ return ctx->card->driver->start_iso(ctx, cycle, sync, tags);
}
-
-EXPORT_SYMBOL(fw_iso_context_send);
+EXPORT_SYMBOL(fw_iso_context_start);
int
fw_iso_context_queue(struct fw_iso_context *ctx,
- struct fw_iso_packet *packet, void *payload)
+ struct fw_iso_packet *packet,
+ struct fw_iso_buffer *buffer,
+ unsigned long payload)
{
struct fw_card *card = ctx->card;
- return card->driver->queue_iso(ctx, packet, payload);
+ return card->driver->queue_iso(ctx, packet, buffer, payload);
}
-
EXPORT_SYMBOL(fw_iso_context_queue);
+
+int
+fw_iso_context_stop(struct fw_iso_context *ctx)
+{
+ return ctx->card->driver->stop_iso(ctx);
+}
+EXPORT_SYMBOL(fw_iso_context_stop);
git.samba.org / sfrench / cifs-2.6.git / blobdiff