This source file includes following definitions.
- usb_block_allocmem
- usb_block_real_freemem
- usb_block_freemem
- usb_allocmem
- usb_freemem
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48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/kernel.h>
51 #include <sys/malloc.h>
52 #include <sys/queue.h>
53 #include <sys/timeout.h>
54 #include <sys/device.h>
55 #include <machine/bus.h>
56
57 #ifdef DIAGNOSTIC
58 #include <sys/proc.h>
59 #endif
60
61 #include <dev/usb/usb.h>
62 #include <dev/usb/usbdi.h>
63 #include <dev/usb/usbdivar.h>
64 #include <dev/usb/usb_mem.h>
65
66 #ifdef USB_DEBUG
67 #define DPRINTF(x) do { if (usbdebug) printf x; } while (0)
68 #define DPRINTFN(n,x) do { if (usbdebug>(n)) printf x; } while (0)
69 extern int usbdebug;
70 #else
71 #define DPRINTF(x)
72 #define DPRINTFN(n,x)
73 #endif
74
75 #define USB_MEM_SMALL 64
76 #define USB_MEM_CHUNKS 64
77 #define USB_MEM_BLOCK (USB_MEM_SMALL * USB_MEM_CHUNKS)
78
79
80 struct usb_frag_dma {
81 usb_dma_block_t *block;
82 u_int offs;
83 LIST_ENTRY(usb_frag_dma) next;
84 };
85
86 usbd_status usb_block_allocmem(bus_dma_tag_t, size_t, size_t,
87 usb_dma_block_t **);
88 void usb_block_freemem(usb_dma_block_t *);
89
90 LIST_HEAD(, usb_dma_block) usb_blk_freelist =
91 LIST_HEAD_INITIALIZER(usb_blk_freelist);
92 int usb_blk_nfree = 0;
93
94 LIST_HEAD(, usb_frag_dma) usb_frag_freelist =
95 LIST_HEAD_INITIALIZER(usb_frag_freelist);
96
97 usbd_status
98 usb_block_allocmem(bus_dma_tag_t tag, size_t size, size_t align,
99 usb_dma_block_t **dmap)
100 {
101 int error;
102 usb_dma_block_t *p;
103 int s;
104
105 DPRINTFN(5, ("usb_block_allocmem: size=%lu align=%lu\n",
106 (u_long)size, (u_long)align));
107
108 #ifdef DIAGNOSTIC
109 if (!curproc) {
110 printf("usb_block_allocmem: in interrupt context, size=%lu\n",
111 (unsigned long) size);
112 }
113 #endif
114
115 s = splusb();
116
117 for (p = LIST_FIRST(&usb_blk_freelist); p; p = LIST_NEXT(p, next)) {
118 if (p->tag == tag && p->size >= size && p->align >= align) {
119 LIST_REMOVE(p, next);
120 usb_blk_nfree--;
121 splx(s);
122 *dmap = p;
123 DPRINTFN(6,("usb_block_allocmem: free list size=%lu\n",
124 (u_long)p->size));
125 return (USBD_NORMAL_COMPLETION);
126 }
127 }
128 splx(s);
129
130 #ifdef DIAGNOSTIC
131 if (!curproc) {
132 printf("usb_block_allocmem: in interrupt context, failed\n");
133 return (USBD_NOMEM);
134 }
135 #endif
136
137 DPRINTFN(6, ("usb_block_allocmem: no free\n"));
138 p = malloc(sizeof *p, M_USB, M_NOWAIT);
139 if (p == NULL)
140 return (USBD_NOMEM);
141
142 p->tag = tag;
143 p->size = size;
144 p->align = align;
145 error = bus_dmamem_alloc(tag, p->size, align, 0,
146 p->segs, sizeof(p->segs)/sizeof(p->segs[0]),
147 &p->nsegs, BUS_DMA_NOWAIT);
148 if (error)
149 goto free0;
150
151 error = bus_dmamem_map(tag, p->segs, p->nsegs, p->size,
152 &p->kaddr, BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
153 if (error)
154 goto free1;
155
156 error = bus_dmamap_create(tag, p->size, 1, p->size,
157 0, BUS_DMA_NOWAIT, &p->map);
158 if (error)
159 goto unmap;
160
161 error = bus_dmamap_load(tag, p->map, p->kaddr, p->size, NULL,
162 BUS_DMA_NOWAIT);
163 if (error)
164 goto destroy;
165
166 *dmap = p;
167 return (USBD_NORMAL_COMPLETION);
168
169 destroy:
170 bus_dmamap_destroy(tag, p->map);
171 unmap:
172 bus_dmamem_unmap(tag, p->kaddr, p->size);
173 free1:
174 bus_dmamem_free(tag, p->segs, p->nsegs);
175 free0:
176 free(p, M_USB);
177 return (USBD_NOMEM);
178 }
179
180 #if 0
181 void
182 usb_block_real_freemem(usb_dma_block_t *p)
183 {
184 #ifdef DIAGNOSTIC
185 if (!curproc) {
186 printf("usb_block_real_freemem: in interrupt context\n");
187 return;
188 }
189 #endif
190 bus_dmamap_unload(p->tag, p->map);
191 bus_dmamap_destroy(p->tag, p->map);
192 bus_dmamem_unmap(p->tag, p->kaddr, p->size);
193 bus_dmamem_free(p->tag, p->segs, p->nsegs);
194 free(p, M_USB);
195 }
196 #endif
197
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199
200
201
202
203 void
204 usb_block_freemem(usb_dma_block_t *p)
205 {
206 int s;
207
208 DPRINTFN(6, ("usb_block_freemem: size=%lu\n", (u_long)p->size));
209 s = splusb();
210 LIST_INSERT_HEAD(&usb_blk_freelist, p, next);
211 usb_blk_nfree++;
212 splx(s);
213 }
214
215 usbd_status
216 usb_allocmem(usbd_bus_handle bus, size_t size, size_t align, usb_dma_t *p)
217 {
218 bus_dma_tag_t tag = bus->dmatag;
219 usbd_status err;
220 struct usb_frag_dma *f;
221 usb_dma_block_t *b;
222 int i;
223 int s;
224
225
226 if (size > USB_MEM_SMALL || align > USB_MEM_SMALL) {
227 DPRINTFN(1, ("usb_allocmem: large alloc %d\n", (int)size));
228 size = (size + USB_MEM_BLOCK - 1) & ~(USB_MEM_BLOCK - 1);
229 err = usb_block_allocmem(tag, size, align, &p->block);
230 if (!err) {
231 p->block->fullblock = 1;
232 p->offs = 0;
233 }
234 return (err);
235 }
236
237 s = splusb();
238
239 for (f = LIST_FIRST(&usb_frag_freelist); f; f = LIST_NEXT(f, next))
240 if (f->block->tag == tag)
241 break;
242 if (f == NULL) {
243 DPRINTFN(1, ("usb_allocmem: adding fragments\n"));
244 err = usb_block_allocmem(tag, USB_MEM_BLOCK, USB_MEM_SMALL,&b);
245 if (err) {
246 splx(s);
247 return (err);
248 }
249 b->fullblock = 0;
250 for (i = 0; i < USB_MEM_BLOCK; i += USB_MEM_SMALL) {
251 f = (struct usb_frag_dma *)(b->kaddr + i);
252 f->block = b;
253 f->offs = i;
254 LIST_INSERT_HEAD(&usb_frag_freelist, f, next);
255 }
256 f = LIST_FIRST(&usb_frag_freelist);
257 }
258 p->block = f->block;
259 p->offs = f->offs;
260 LIST_REMOVE(f, next);
261 splx(s);
262 DPRINTFN(5, ("usb_allocmem: use frag=%p size=%d\n", f, (int)size));
263 return (USBD_NORMAL_COMPLETION);
264 }
265
266 void
267 usb_freemem(usbd_bus_handle bus, usb_dma_t *p)
268 {
269 struct usb_frag_dma *f;
270 int s;
271
272 if (p->block->fullblock) {
273 DPRINTFN(1, ("usb_freemem: large free\n"));
274 usb_block_freemem(p->block);
275 return;
276 }
277 f = KERNADDR(p, 0);
278 f->block = p->block;
279 f->offs = p->offs;
280 s = splusb();
281 LIST_INSERT_HEAD(&usb_frag_freelist, f, next);
282 splx(s);
283 DPRINTFN(5, ("usb_freemem: frag=%p\n", f));
284 }