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authorBjorn Helgaas <bjorn.helgaas@hp.com>2008-04-28 18:34:18 -0400
committerLen Brown <len.brown@intel.com>2008-04-29 03:22:24 -0400
commit28ccffcf028777e830cbdc30bc54ba8a37e2fc23 (patch)
treed71301fd3b0b5fa652f7ad18361a86a8d904a6c0 /drivers/pnp
parentecfa935a2f7ef89543608f3ca05340c158c9a236 (diff)
PNP: reduce redundancy in pnp_assign_port() and others
Use a temporary "res" pointer to replace repeated lookups in the pnp resource tables. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Acked-By: Rene Herman <rene.herman@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/pnp')
-rw-r--r--drivers/pnp/manager.c123
1 files changed, 56 insertions, 67 deletions
diff --git a/drivers/pnp/manager.c b/drivers/pnp/manager.c
index 8267efd679a..be21dec539d 100644
--- a/drivers/pnp/manager.c
+++ b/drivers/pnp/manager.c
@@ -19,8 +19,7 @@ DEFINE_MUTEX(pnp_res_mutex);
19 19
20static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx) 20static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
21{ 21{
22 resource_size_t *start, *end; 22 struct resource *res;
23 unsigned long *flags;
24 23
25 if (idx >= PNP_MAX_PORT) { 24 if (idx >= PNP_MAX_PORT) {
26 dev_err(&dev->dev, "too many I/O port resources\n"); 25 dev_err(&dev->dev, "too many I/O port resources\n");
@@ -28,49 +27,46 @@ static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
28 return 1; 27 return 1;
29 } 28 }
30 29
31 start = &dev->res.port_resource[idx].start; 30 res = &dev->res.port_resource[idx];
32 end = &dev->res.port_resource[idx].end;
33 flags = &dev->res.port_resource[idx].flags;
34 31
35 /* check if this resource has been manually set, if so skip */ 32 /* check if this resource has been manually set, if so skip */
36 if (!(dev->res.port_resource[idx].flags & IORESOURCE_AUTO)) { 33 if (!(res->flags & IORESOURCE_AUTO)) {
37 dev_dbg(&dev->dev, " io %d already set to %#llx-%#llx " 34 dev_dbg(&dev->dev, " io %d already set to %#llx-%#llx "
38 "flags %#lx\n", idx, (unsigned long long) *start, 35 "flags %#lx\n", idx, (unsigned long long) res->start,
39 (unsigned long long) *end, *flags); 36 (unsigned long long) res->end, res->flags);
40 return 1; 37 return 1;
41 } 38 }
42 39
43 /* set the initial values */ 40 /* set the initial values */
44 *flags |= rule->flags | IORESOURCE_IO; 41 res->flags |= rule->flags | IORESOURCE_IO;
45 *flags &= ~IORESOURCE_UNSET; 42 res->flags &= ~IORESOURCE_UNSET;
46 43
47 if (!rule->size) { 44 if (!rule->size) {
48 *flags |= IORESOURCE_DISABLED; 45 res->flags |= IORESOURCE_DISABLED;
49 dev_dbg(&dev->dev, " io %d disabled\n", idx); 46 dev_dbg(&dev->dev, " io %d disabled\n", idx);
50 return 1; /* skip disabled resource requests */ 47 return 1; /* skip disabled resource requests */
51 } 48 }
52 49
53 *start = rule->min; 50 res->start = rule->min;
54 *end = *start + rule->size - 1; 51 res->end = res->start + rule->size - 1;
55 52
56 /* run through until pnp_check_port is happy */ 53 /* run through until pnp_check_port is happy */
57 while (!pnp_check_port(dev, idx)) { 54 while (!pnp_check_port(dev, idx)) {
58 *start += rule->align; 55 res->start += rule->align;
59 *end = *start + rule->size - 1; 56 res->end = res->start + rule->size - 1;
60 if (*start > rule->max || !rule->align) { 57 if (res->start > rule->max || !rule->align) {
61 dev_dbg(&dev->dev, " couldn't assign io %d\n", idx); 58 dev_dbg(&dev->dev, " couldn't assign io %d\n", idx);
62 return 0; 59 return 0;
63 } 60 }
64 } 61 }
65 dev_dbg(&dev->dev, " assign io %d %#llx-%#llx\n", idx, 62 dev_dbg(&dev->dev, " assign io %d %#llx-%#llx\n", idx,
66 (unsigned long long) *start, (unsigned long long) *end); 63 (unsigned long long) res->start, (unsigned long long) res->end);
67 return 1; 64 return 1;
68} 65}
69 66
70static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx) 67static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
71{ 68{
72 resource_size_t *start, *end; 69 struct resource *res;
73 unsigned long *flags;
74 70
75 if (idx >= PNP_MAX_MEM) { 71 if (idx >= PNP_MAX_MEM) {
76 dev_err(&dev->dev, "too many memory resources\n"); 72 dev_err(&dev->dev, "too many memory resources\n");
@@ -78,59 +74,56 @@ static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
78 return 1; 74 return 1;
79 } 75 }
80 76
81 start = &dev->res.mem_resource[idx].start; 77 res = &dev->res.mem_resource[idx];
82 end = &dev->res.mem_resource[idx].end;
83 flags = &dev->res.mem_resource[idx].flags;
84 78
85 /* check if this resource has been manually set, if so skip */ 79 /* check if this resource has been manually set, if so skip */
86 if (!(dev->res.mem_resource[idx].flags & IORESOURCE_AUTO)) { 80 if (!(res->flags & IORESOURCE_AUTO)) {
87 dev_dbg(&dev->dev, " mem %d already set to %#llx-%#llx " 81 dev_dbg(&dev->dev, " mem %d already set to %#llx-%#llx "
88 "flags %#lx\n", idx, (unsigned long long) *start, 82 "flags %#lx\n", idx, (unsigned long long) res->start,
89 (unsigned long long) *end, *flags); 83 (unsigned long long) res->end, res->flags);
90 return 1; 84 return 1;
91 } 85 }
92 86
93 /* set the initial values */ 87 /* set the initial values */
94 *flags |= rule->flags | IORESOURCE_MEM; 88 res->flags |= rule->flags | IORESOURCE_MEM;
95 *flags &= ~IORESOURCE_UNSET; 89 res->flags &= ~IORESOURCE_UNSET;
96 90
97 /* convert pnp flags to standard Linux flags */ 91 /* convert pnp flags to standard Linux flags */
98 if (!(rule->flags & IORESOURCE_MEM_WRITEABLE)) 92 if (!(rule->flags & IORESOURCE_MEM_WRITEABLE))
99 *flags |= IORESOURCE_READONLY; 93 res->flags |= IORESOURCE_READONLY;
100 if (rule->flags & IORESOURCE_MEM_CACHEABLE) 94 if (rule->flags & IORESOURCE_MEM_CACHEABLE)
101 *flags |= IORESOURCE_CACHEABLE; 95 res->flags |= IORESOURCE_CACHEABLE;
102 if (rule->flags & IORESOURCE_MEM_RANGELENGTH) 96 if (rule->flags & IORESOURCE_MEM_RANGELENGTH)
103 *flags |= IORESOURCE_RANGELENGTH; 97 res->flags |= IORESOURCE_RANGELENGTH;
104 if (rule->flags & IORESOURCE_MEM_SHADOWABLE) 98 if (rule->flags & IORESOURCE_MEM_SHADOWABLE)
105 *flags |= IORESOURCE_SHADOWABLE; 99 res->flags |= IORESOURCE_SHADOWABLE;
106 100
107 if (!rule->size) { 101 if (!rule->size) {
108 *flags |= IORESOURCE_DISABLED; 102 res->flags |= IORESOURCE_DISABLED;
109 dev_dbg(&dev->dev, " mem %d disabled\n", idx); 103 dev_dbg(&dev->dev, " mem %d disabled\n", idx);
110 return 1; /* skip disabled resource requests */ 104 return 1; /* skip disabled resource requests */
111 } 105 }
112 106
113 *start = rule->min; 107 res->start = rule->min;
114 *end = *start + rule->size - 1; 108 res->end = res->start + rule->size - 1;
115 109
116 /* run through until pnp_check_mem is happy */ 110 /* run through until pnp_check_mem is happy */
117 while (!pnp_check_mem(dev, idx)) { 111 while (!pnp_check_mem(dev, idx)) {
118 *start += rule->align; 112 res->start += rule->align;
119 *end = *start + rule->size - 1; 113 res->end = res->start + rule->size - 1;
120 if (*start > rule->max || !rule->align) { 114 if (res->start > rule->max || !rule->align) {
121 dev_dbg(&dev->dev, " couldn't assign mem %d\n", idx); 115 dev_dbg(&dev->dev, " couldn't assign mem %d\n", idx);
122 return 0; 116 return 0;
123 } 117 }
124 } 118 }
125 dev_dbg(&dev->dev, " assign mem %d %#llx-%#llx\n", idx, 119 dev_dbg(&dev->dev, " assign mem %d %#llx-%#llx\n", idx,
126 (unsigned long long) *start, (unsigned long long) *end); 120 (unsigned long long) res->start, (unsigned long long) res->end);
127 return 1; 121 return 1;
128} 122}
129 123
130static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx) 124static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
131{ 125{
132 resource_size_t *start, *end; 126 struct resource *res;
133 unsigned long *flags;
134 int i; 127 int i;
135 128
136 /* IRQ priority: this table is good for i386 */ 129 /* IRQ priority: this table is good for i386 */
@@ -144,40 +137,39 @@ static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
144 return 1; 137 return 1;
145 } 138 }
146 139
147 start = &dev->res.irq_resource[idx].start; 140 res = &dev->res.irq_resource[idx];
148 end = &dev->res.irq_resource[idx].end;
149 flags = &dev->res.irq_resource[idx].flags;
150 141
151 /* check if this resource has been manually set, if so skip */ 142 /* check if this resource has been manually set, if so skip */
152 if (!(dev->res.irq_resource[idx].flags & IORESOURCE_AUTO)) { 143 if (!(res->flags & IORESOURCE_AUTO)) {
153 dev_dbg(&dev->dev, " irq %d already set to %d flags %#lx\n", 144 dev_dbg(&dev->dev, " irq %d already set to %d flags %#lx\n",
154 idx, (int) *start, *flags); 145 idx, (int) res->start, res->flags);
155 return 1; 146 return 1;
156 } 147 }
157 148
158 /* set the initial values */ 149 /* set the initial values */
159 *flags |= rule->flags | IORESOURCE_IRQ; 150 res->flags |= rule->flags | IORESOURCE_IRQ;
160 *flags &= ~IORESOURCE_UNSET; 151 res->flags &= ~IORESOURCE_UNSET;
161 152
162 if (bitmap_empty(rule->map, PNP_IRQ_NR)) { 153 if (bitmap_empty(rule->map, PNP_IRQ_NR)) {
163 *flags |= IORESOURCE_DISABLED; 154 res->flags |= IORESOURCE_DISABLED;
164 dev_dbg(&dev->dev, " irq %d disabled\n", idx); 155 dev_dbg(&dev->dev, " irq %d disabled\n", idx);
165 return 1; /* skip disabled resource requests */ 156 return 1; /* skip disabled resource requests */
166 } 157 }
167 158
168 /* TBD: need check for >16 IRQ */ 159 /* TBD: need check for >16 IRQ */
169 *start = find_next_bit(rule->map, PNP_IRQ_NR, 16); 160 res->start = find_next_bit(rule->map, PNP_IRQ_NR, 16);
170 if (*start < PNP_IRQ_NR) { 161 if (res->start < PNP_IRQ_NR) {
171 *end = *start; 162 res->end = res->start;
172 dev_dbg(&dev->dev, " assign irq %d %d\n", idx, (int) *start); 163 dev_dbg(&dev->dev, " assign irq %d %d\n", idx,
164 (int) res->start);
173 return 1; 165 return 1;
174 } 166 }
175 for (i = 0; i < 16; i++) { 167 for (i = 0; i < 16; i++) {
176 if (test_bit(xtab[i], rule->map)) { 168 if (test_bit(xtab[i], rule->map)) {
177 *start = *end = xtab[i]; 169 res->start = res->end = xtab[i];
178 if (pnp_check_irq(dev, idx)) { 170 if (pnp_check_irq(dev, idx)) {
179 dev_dbg(&dev->dev, " assign irq %d %d\n", idx, 171 dev_dbg(&dev->dev, " assign irq %d %d\n", idx,
180 (int) *start); 172 (int) res->start);
181 return 1; 173 return 1;
182 } 174 }
183 } 175 }
@@ -188,8 +180,7 @@ static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
188 180
189static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx) 181static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
190{ 182{
191 resource_size_t *start, *end; 183 struct resource *res;
192 unsigned long *flags;
193 int i; 184 int i;
194 185
195 /* DMA priority: this table is good for i386 */ 186 /* DMA priority: this table is good for i386 */
@@ -202,35 +193,33 @@ static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
202 return; 193 return;
203 } 194 }
204 195
205 start = &dev->res.dma_resource[idx].start; 196 res = &dev->res.dma_resource[idx];
206 end = &dev->res.dma_resource[idx].end;
207 flags = &dev->res.dma_resource[idx].flags;
208 197
209 /* check if this resource has been manually set, if so skip */ 198 /* check if this resource has been manually set, if so skip */
210 if (!(dev->res.dma_resource[idx].flags & IORESOURCE_AUTO)) { 199 if (!(res->flags & IORESOURCE_AUTO)) {
211 dev_dbg(&dev->dev, " dma %d already set to %d flags %#lx\n", 200 dev_dbg(&dev->dev, " dma %d already set to %d flags %#lx\n",
212 idx, (int) *start, *flags); 201 idx, (int) res->start, res->flags);
213 return; 202 return;
214 } 203 }
215 204
216 /* set the initial values */ 205 /* set the initial values */
217 *flags |= rule->flags | IORESOURCE_DMA; 206 res->flags |= rule->flags | IORESOURCE_DMA;
218 *flags &= ~IORESOURCE_UNSET; 207 res->flags &= ~IORESOURCE_UNSET;
219 208
220 for (i = 0; i < 8; i++) { 209 for (i = 0; i < 8; i++) {
221 if (rule->map & (1 << xtab[i])) { 210 if (rule->map & (1 << xtab[i])) {
222 *start = *end = xtab[i]; 211 res->start = res->end = xtab[i];
223 if (pnp_check_dma(dev, idx)) { 212 if (pnp_check_dma(dev, idx)) {
224 dev_dbg(&dev->dev, " assign dma %d %d\n", idx, 213 dev_dbg(&dev->dev, " assign dma %d %d\n", idx,
225 (int) *start); 214 (int) res->start);
226 return; 215 return;
227 } 216 }
228 } 217 }
229 } 218 }
230#ifdef MAX_DMA_CHANNELS 219#ifdef MAX_DMA_CHANNELS
231 *start = *end = MAX_DMA_CHANNELS; 220 res->start = res->end = MAX_DMA_CHANNELS;
232#endif 221#endif
233 *flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED; 222 res->flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED;
234 dev_dbg(&dev->dev, " disable dma %d\n", idx); 223 dev_dbg(&dev->dev, " disable dma %d\n", idx);
235} 224}
236 225
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