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dde_ipxe: alloc DMA memory via dde_kit

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This commit is contained in:
Alexander Boettcher 2013-02-21 13:45:39 +01:00 committed by Norman Feske
parent 415b50032e
commit 269efd1d6d
3 changed files with 37 additions and 29 deletions
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49
dde_ipxe/src/lib/dde_ipxe/dde_support.cc
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@ -14,64 +14,59 @@
#include <base/allocator_avl.h>
#include <base/env.h>
#include <base/printf.h>
#include <dataspace/client.h>
#include <timer_session/connection.h>
#include <util/misc_math.h>
extern "C" {
#include <dde_kit/pgtab.h>
#include <dde_kit/pci.h>
#include "dde_support.h"
}
using namespace Genode;
/*******************************************
** Support for aligned memory allocation **
*******************************************/
/***************************************************
** Support for aligned and DMA memory allocation **
***************************************************/
enum { BACKING_STORE_SIZE = 1024 * 1024 };
Allocator_avl *allocator()
static Allocator_avl& allocator()
{
static Allocator_avl _avl(env()->heap());
return &_avl;
return _avl;
}
void __attribute__((constructor)) init()
extern "C" int dde_mem_init(int bus, int dev, int func)
{
try {
Dataspace_capability ds_cap = env()->ram_session()->alloc(BACKING_STORE_SIZE);
addr_t base = (addr_t)env()->rm_session()->attach(ds_cap);
addr_t base = dde_kit_pci_alloc_dma_buffer(bus, dev, func,
BACKING_STORE_SIZE);
/* add to allocator */
allocator()->add_range(base, BACKING_STORE_SIZE);
/* add to DDE-kit page tables */
addr_t phys = Dataspace_client(ds_cap).phys_addr();
dde_kit_pgtab_set_region_with_size((void *)base, phys, BACKING_STORE_SIZE);
allocator().add_range(base, BACKING_STORE_SIZE);
} catch (...) {
PERR("Initialization of block memory failed!");
return false;
}
return true;
}
extern "C" void *dde_alloc_memblock(dde_kit_size_t size, dde_kit_size_t align, dde_kit_size_t offset)
extern "C" void *dde_alloc_memblock(dde_kit_size_t size, dde_kit_size_t align,
dde_kit_size_t offset)
{
void *ptr;
if (allocator()->alloc_aligned(size, &ptr, log2(align)).is_error()) {
PERR("memory allocation failed in alloc_memblock (size=%zd, align=%zx, offset=%zx)",
size, align, offset);
if (allocator().alloc_aligned(size, &ptr, log2(align)).is_error()) {
PERR("memory allocation failed in alloc_memblock (size=%zd, align=%zx,"
" offset=%zx)", size, align, offset);
return 0;
};
}
return ptr;
}
extern "C" void dde_free_memblock(void *p, dde_kit_size_t size)
{
allocator()->free(p, size);
allocator().free(p, size);
}
@ -84,8 +79,8 @@ extern "C" void dde_timer2_udelay(unsigned long usecs)
/*
* This function is called only once during rdtsc calibration (usecs will be
* 10000, see dde.c 'udelay'. We do not use DDE timers here, since Genode's
* timer connection is the precised one around.
* timer connection is the most precise one around.
*/
Timer::Connection timer;
timer.msleep(usecs / 1000);
timer.usleep(usecs);
}

4
dde_ipxe/src/lib/dde_ipxe/dde_support.h
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@ -17,8 +17,10 @@
#include <dde_kit/types.h>
void *dde_alloc_memblock(dde_kit_size_t size, dde_kit_size_t align, dde_kit_size_t offset);
void *dde_alloc_memblock(dde_kit_size_t size, dde_kit_size_t align,
dde_kit_size_t offset);
void dde_free_memblock(void *p, dde_kit_size_t size);
void dde_timer2_udelay(unsigned long usecs);
int dde_mem_init(int bus, int dev, int func);
#endif /* _DDE_SUPPORT_H_ */

13
dde_ipxe/src/lib/dde_ipxe/nic.c
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@ -27,6 +27,7 @@
#include <dde_ipxe/nic.h>
#include "local.h"
#include "dde_support.h"
/**
* DDE iPXE mutual exclusion lock
@ -310,8 +311,18 @@ int dde_ipxe_nic_init(void)
if (location == NO_DEVICE_FOUND)
return 0;
/* find and open iPXE NIC device */
/* find iPXE NIC device */
net_dev = find_netdev_by_location(BUS_TYPE_PCI, location);
/* initialize memory backend allocator for nic driver */
if (!dde_mem_init(PCI_BUS(net_dev->dev->desc.location),
PCI_SLOT(net_dev->dev->desc.location),
PCI_FUNC(net_dev->dev->desc.location))) {
LOG("initialization of block memory failed!");
return 0;
}
/* open iPXE NIC device */
if (netdev_open(net_dev)) {
LOG("opening device " FMT_BUSDEVFN " failed",
PCI_BUS(net_dev->dev->desc.location),