xref: /freebsd-10.2-release/sys/dev/ixl/i40e_osdep.c

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/*$FreeBSD: stable/10/sys/dev/ixl/i40e_osdep.c 270631 2014-08-25 22:04:29Z jfv $*/

#include <machine/stdarg.h>

#include "ixl.h"

/********************************************************************
 * Manage DMA'able memory.
 *******************************************************************/
static void
i40e_dmamap_cb(void *arg, bus_dma_segment_t * segs, int nseg, int error)
{
        if (error)
                return;
        *(bus_addr_t *) arg = segs->ds_addr;
        return;
}

i40e_status
i40e_allocate_virt(struct i40e_hw *hw, struct i40e_virt_mem *m, u32 size)
{
	m->va = malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO);
	return(m->va == NULL);
}

i40e_status
i40e_free_virt(struct i40e_hw *hw, struct i40e_virt_mem *m)
{
	free(m->va, M_DEVBUF);
	return(0);
}

i40e_status
i40e_allocate_dma(struct i40e_hw *hw, struct i40e_dma_mem *dma,
	bus_size_t size, u32 alignment)
{
	device_t	dev = ((struct i40e_osdep *)hw->back)->dev;
	int		err;


	err = bus_dma_tag_create(bus_get_dma_tag(dev),	/* parent */
			       alignment, 0,	/* alignment, bounds */
			       BUS_SPACE_MAXADDR,	/* lowaddr */
			       BUS_SPACE_MAXADDR,	/* highaddr */
			       NULL, NULL,	/* filter, filterarg */
			       size,	/* maxsize */
			       1,	/* nsegments */
			       size,	/* maxsegsize */
			       BUS_DMA_ALLOCNOW, /* flags */
			       NULL,	/* lockfunc */
			       NULL,	/* lockfuncarg */
			       &dma->tag);
	if (err != 0) {
		device_printf(dev,
		    "i40e_allocate_dma: bus_dma_tag_create failed, "
		    "error %u\n", err);
		goto fail_0;
	}
	err = bus_dmamem_alloc(dma->tag, (void **)&dma->va,
			     BUS_DMA_NOWAIT | BUS_DMA_ZERO, &dma->map);
	if (err != 0) {
		device_printf(dev,
		    "i40e_allocate_dma: bus_dmamem_alloc failed, "
		    "error %u\n", err);
		goto fail_1;
	}
	err = bus_dmamap_load(dma->tag, dma->map, dma->va,
			    size,
			    i40e_dmamap_cb,
			    &dma->pa,
			    BUS_DMA_NOWAIT);
	if (err != 0) {
		device_printf(dev,
		    "i40e_allocate_dma: bus_dmamap_load failed, "
		    "error %u\n", err);
		goto fail_2;
	}
	dma->size = size;
	bus_dmamap_sync(dma->tag, dma->map,
	    BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
	return (0);
fail_2:
	bus_dmamem_free(dma->tag, dma->va, dma->map);
fail_1:
	bus_dma_tag_destroy(dma->tag);
fail_0:
	dma->map = NULL;
	dma->tag = NULL;
	return (err);
}

i40e_status
i40e_free_dma(struct i40e_hw *hw, struct i40e_dma_mem *dma)
{
	bus_dmamap_sync(dma->tag, dma->map,
	    BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
	bus_dmamap_unload(dma->tag, dma->map);
	bus_dmamem_free(dma->tag, dma->va, dma->map);
	bus_dma_tag_destroy(dma->tag);
	return (0);
}

void
i40e_init_spinlock(struct i40e_spinlock *lock)
{
	mtx_init(&lock->mutex, "mutex",
	    MTX_NETWORK_LOCK, MTX_DEF | MTX_DUPOK);
}

void
i40e_acquire_spinlock(struct i40e_spinlock *lock)
{
	mtx_lock(&lock->mutex);
}

void
i40e_release_spinlock(struct i40e_spinlock *lock)
{
	mtx_unlock(&lock->mutex);
}

void
i40e_destroy_spinlock(struct i40e_spinlock *lock)
{
	mtx_destroy(&lock->mutex);
}

/*
** i40e_debug_d - OS dependent version of shared code debug printing
*/
void i40e_debug_d(void *hw, u32 mask, char *fmt, ...)
{
        char buf[512];
        va_list args;

        if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
                return;

	va_start(args, fmt);
        vsnprintf(buf, sizeof(buf), fmt, args);
	va_end(args);

        /* the debug string is already formatted with a newline */
        printf("%s", buf);
}

u16
i40e_read_pci_cfg(struct i40e_hw *hw, u32 reg)
{
        u16 value;

        value = pci_read_config(((struct i40e_osdep *)hw->back)->dev,
            reg, 2);

        return (value);
}

void
i40e_write_pci_cfg(struct i40e_hw *hw, u32 reg, u16 value)
{
        pci_write_config(((struct i40e_osdep *)hw->back)->dev,
            reg, value, 2);

        return;
}