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System call delegation supports DMA alignment

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This commit is contained in:
Taku Shimosawa
2012-02-24 18:08:05 +09:00
parent dad780a133
commit a63b4a7369
7 changed files with 124 additions and 20 deletions
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36
linux/mod_mcctrl/ikc.c
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@ -7,6 +7,8 @@
#include <aal/ikc.h>
#include <ikc/master.h>
#define REQUEST_SHIFT 16
int num_channels;
struct mcctrl_channel *channels;
@ -98,7 +100,9 @@ static void mcctrl_ikc_init(aal_os_t os, int cpu, unsigned long rphys)
sizeof(struct ikc_scd_init_param));
rpm = ioremap_wc(phys, sizeof(struct ikc_scd_init_param));
pmc->param.request_va = (void *)__get_free_pages(GFP_KERNEL, 4);
pmc->param.request_va =
(void *)__get_free_pages(GFP_KERNEL,
REQUEST_SHIFT - PAGE_SHIFT);
pmc->param.request_pa = virt_to_phys(pmc->param.request_va);
pmc->param.doorbell_va = mcctrl_doorbell_va;
pmc->param.doorbell_pa = mcctrl_doorbell_pa;
@ -199,3 +203,33 @@ int prepare_ikc_channels(aal_os_t os)
aal_ikc_listen_port(os, &listen_param);
return 0;
}
void __destroy_ikc_channel(aal_os_t os, struct mcctrl_channel *pmc)
{
free_pages((unsigned long)pmc->param.request_va,
REQUEST_SHIFT - PAGE_SHIFT);
free_page((unsigned long)pmc->param.post_va);
iounmap(pmc->param.response_va);
aal_device_unmap_memory(aal_os_to_dev(os),
pmc->param.response_pa, PAGE_SIZE);
free_pages((unsigned long)pmc->dma_buf,
DMA_PIN_SHIFT - PAGE_SHIFT);
}
void destroy_ikc_channels(aal_os_t os)
{
int i;
for (i = 0; i < num_channels; i++) {
if (channels[i].c) {
// aal_ikc_disconnect(channels[i].c);
aal_ikc_free_channel(channels[i].c);
__destroy_ikc_channel(os, channels + i);
printk("Channel #%d freed.\n", i);
}
}
free_page((unsigned long)mcctrl_doorbell_va);
kfree(channels);
}