i40e_osdep.c revision 270631 
1/******************************************************************************
2
3  Copyright (c) 2013-2014, Intel Corporation
4  All rights reserved.
5
6  Redistribution and use in source and binary forms, with or without
7  modification, are permitted provided that the following conditions are met:
8
9   1. Redistributions of source code must retain the above copyright notice,
10      this list of conditions and the following disclaimer.
11
12   2. Redistributions in binary form must reproduce the above copyright
13      notice, this list of conditions and the following disclaimer in the
14      documentation and/or other materials provided with the distribution.
15
16   3. Neither the name of the Intel Corporation nor the names of its
17      contributors may be used to endorse or promote products derived from
18      this software without specific prior written permission.
19
20  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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28  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30  POSSIBILITY OF SUCH DAMAGE.
31
32******************************************************************************/
33/*$FreeBSD: stable/10/sys/dev/ixl/i40e_osdep.c 270631 2014-08-25 22:04:29Z jfv $*/
34
35#include <machine/stdarg.h>
36
37#include "ixl.h"
38
39/********************************************************************
40 * Manage DMA'able memory.
41 *******************************************************************/
42static void
43i40e_dmamap_cb(void *arg, bus_dma_segment_t * segs, int nseg, int error)
44{
45        if (error)
46                return;
47        *(bus_addr_t *) arg = segs->ds_addr;
48        return;
49}
50
51i40e_status
52i40e_allocate_virt(struct i40e_hw *hw, struct i40e_virt_mem *m, u32 size)
53{
54	m->va = malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO);
55	return(m->va == NULL);
56}
57
58i40e_status
59i40e_free_virt(struct i40e_hw *hw, struct i40e_virt_mem *m)
60{
61	free(m->va, M_DEVBUF);
62	return(0);
63}
64
65i40e_status
66i40e_allocate_dma(struct i40e_hw *hw, struct i40e_dma_mem *dma,
67	bus_size_t size, u32 alignment)
68{
69	device_t	dev = ((struct i40e_osdep *)hw->back)->dev;
70	int		err;
71
72
73	err = bus_dma_tag_create(bus_get_dma_tag(dev),	/* parent */
74			       alignment, 0,	/* alignment, bounds */
75			       BUS_SPACE_MAXADDR,	/* lowaddr */
76			       BUS_SPACE_MAXADDR,	/* highaddr */
77			       NULL, NULL,	/* filter, filterarg */
78			       size,	/* maxsize */
79			       1,	/* nsegments */
80			       size,	/* maxsegsize */
81			       BUS_DMA_ALLOCNOW, /* flags */
82			       NULL,	/* lockfunc */
83			       NULL,	/* lockfuncarg */
84			       &dma->tag);
85	if (err != 0) {
86		device_printf(dev,
87		    "i40e_allocate_dma: bus_dma_tag_create failed, "
88		    "error %u\n", err);
89		goto fail_0;
90	}
91	err = bus_dmamem_alloc(dma->tag, (void **)&dma->va,
92			     BUS_DMA_NOWAIT | BUS_DMA_ZERO, &dma->map);
93	if (err != 0) {
94		device_printf(dev,
95		    "i40e_allocate_dma: bus_dmamem_alloc failed, "
96		    "error %u\n", err);
97		goto fail_1;
98	}
99	err = bus_dmamap_load(dma->tag, dma->map, dma->va,
100			    size,
101			    i40e_dmamap_cb,
102			    &dma->pa,
103			    BUS_DMA_NOWAIT);
104	if (err != 0) {
105		device_printf(dev,
106		    "i40e_allocate_dma: bus_dmamap_load failed, "
107		    "error %u\n", err);
108		goto fail_2;
109	}
110	dma->size = size;
111	bus_dmamap_sync(dma->tag, dma->map,
112	    BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
113	return (0);
114fail_2:
115	bus_dmamem_free(dma->tag, dma->va, dma->map);
116fail_1:
117	bus_dma_tag_destroy(dma->tag);
118fail_0:
119	dma->map = NULL;
120	dma->tag = NULL;
121	return (err);
122}
123
124i40e_status
125i40e_free_dma(struct i40e_hw *hw, struct i40e_dma_mem *dma)
126{
127	bus_dmamap_sync(dma->tag, dma->map,
128	    BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
129	bus_dmamap_unload(dma->tag, dma->map);
130	bus_dmamem_free(dma->tag, dma->va, dma->map);
131	bus_dma_tag_destroy(dma->tag);
132	return (0);
133}
134
135void
136i40e_init_spinlock(struct i40e_spinlock *lock)
137{
138	mtx_init(&lock->mutex, "mutex",
139	    MTX_NETWORK_LOCK, MTX_DEF | MTX_DUPOK);
140}
141
142void
143i40e_acquire_spinlock(struct i40e_spinlock *lock)
144{
145	mtx_lock(&lock->mutex);
146}
147
148void
149i40e_release_spinlock(struct i40e_spinlock *lock)
150{
151	mtx_unlock(&lock->mutex);
152}
153
154void
155i40e_destroy_spinlock(struct i40e_spinlock *lock)
156{
157	mtx_destroy(&lock->mutex);
158}
159
160/*
161** i40e_debug_d - OS dependent version of shared code debug printing
162*/
163void i40e_debug_d(void *hw, u32 mask, char *fmt, ...)
164{
165        char buf[512];
166        va_list args;
167
168        if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
169                return;
170
171	va_start(args, fmt);
172        vsnprintf(buf, sizeof(buf), fmt, args);
173	va_end(args);
174
175        /* the debug string is already formatted with a newline */
176        printf("%s", buf);
177}
178
179u16
180i40e_read_pci_cfg(struct i40e_hw *hw, u32 reg)
181{
182        u16 value;
183
184        value = pci_read_config(((struct i40e_osdep *)hw->back)->dev,
185            reg, 2);
186
187        return (value);
188}
189
190void
191i40e_write_pci_cfg(struct i40e_hw *hw, u32 reg, u16 value)
192{
193        pci_write_config(((struct i40e_osdep *)hw->back)->dev,
194            reg, value, 2);
195
196        return;
197}
198
199