This patch adds code to dump PNP resources before and after assigning resources and before writing them to the device. This is enabled by CONFIG_PNP_DEBUG=y. Signed-off-by: Bjorn Helgaas Index: work10/drivers/pnp/base.h =================================================================== --- work10.orig/drivers/pnp/base.h 2008-04-25 11:14:51.000000000 -0600 +++ work10/drivers/pnp/base.h 2008-04-25 11:14:57.000000000 -0600 @@ -16,3 +16,5 @@ int pnp_check_mem(struct pnp_dev * dev, int idx); int pnp_check_irq(struct pnp_dev * dev, int idx); int pnp_check_dma(struct pnp_dev * dev, int idx); + +void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc); Index: work10/drivers/pnp/support.c =================================================================== --- work10.orig/drivers/pnp/support.c 2008-04-25 11:14:48.000000000 -0600 +++ work10/drivers/pnp/support.c 2008-04-25 11:14:57.000000000 -0600 @@ -51,3 +51,44 @@ str[6] = hex_asc((id >> 0) & 0xf); str[7] = '\0'; } + +#ifdef DEBUG +void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc) +{ + struct resource *res; + int i; + + dev_dbg(&dev->dev, "current resources: %s\n", desc); + + for (i = 0; i < PNP_MAX_IRQ; i++) { + res = &dev->res.irq_resource[i]; + if (!(res->flags & IORESOURCE_UNSET)) + dev_dbg(&dev->dev, " irq %lld flags 0x%lx\n", + (unsigned long long) res->start, res->flags); + } + for (i = 0; i < PNP_MAX_DMA; i++) { + res = &dev->res.dma_resource[i]; + if (!(res->flags & IORESOURCE_UNSET)) + dev_dbg(&dev->dev, " dma %lld flags 0x%lx\n", + (unsigned long long) res->start, res->flags); + } + for (i = 0; i < PNP_MAX_PORT; i++) { + res = &dev->res.port_resource[i]; + if (!(res->flags & IORESOURCE_UNSET)) + dev_dbg(&dev->dev, " io 0x%llx-0x%llx flags 0x%lx\n", + (unsigned long long) res->start, + (unsigned long long) res->end, res->flags); + } + for (i = 0; i < PNP_MAX_MEM; i++) { + res = &dev->res.mem_resource[i]; + if (!(res->flags & IORESOURCE_UNSET)) + dev_dbg(&dev->dev, " mem 0x%llx-0x%llx flags 0x%lx\n", + (unsigned long long) res->start, + (unsigned long long) res->end, res->flags); + } +} +#else +void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc) +{ +} +#endif Index: work10/drivers/pnp/manager.c =================================================================== --- work10.orig/drivers/pnp/manager.c 2008-04-25 11:14:55.000000000 -0600 +++ work10/drivers/pnp/manager.c 2008-04-25 11:14:57.000000000 -0600 @@ -28,20 +28,25 @@ return 1; } - /* check if this resource has been manually set, if so skip */ - if (!(dev->res.port_resource[idx].flags & IORESOURCE_AUTO)) - return 1; - start = &dev->res.port_resource[idx].start; end = &dev->res.port_resource[idx].end; flags = &dev->res.port_resource[idx].flags; + /* check if this resource has been manually set, if so skip */ + if (!(dev->res.port_resource[idx].flags & IORESOURCE_AUTO)) { + dev_dbg(&dev->dev, " io %d already set to 0x%llx-0x%llx " + "flags 0x%x\n", idx, (unsigned long long) *start, + (unsigned long long) *end, (int) *flags); + return 1; + } + /* set the initial values */ *flags |= rule->flags | IORESOURCE_IO; *flags &= ~IORESOURCE_UNSET; if (!rule->size) { *flags |= IORESOURCE_DISABLED; + dev_dbg(&dev->dev, " io %d disabled\n", idx); return 1; /* skip disabled resource requests */ } @@ -52,9 +57,13 @@ while (!pnp_check_port(dev, idx)) { *start += rule->align; *end = *start + rule->size - 1; - if (*start > rule->max || !rule->align) + if (*start > rule->max || !rule->align) { + dev_dbg(&dev->dev, " couldn't assign io %d\n", idx); return 0; + } } + dev_dbg(&dev->dev, " assign io %d 0x%llx-0x%llx\n", idx, + (unsigned long long) *start, (unsigned long long) *end); return 1; } @@ -69,14 +78,18 @@ return 1; } - /* check if this resource has been manually set, if so skip */ - if (!(dev->res.mem_resource[idx].flags & IORESOURCE_AUTO)) - return 1; - start = &dev->res.mem_resource[idx].start; end = &dev->res.mem_resource[idx].end; flags = &dev->res.mem_resource[idx].flags; + /* check if this resource has been manually set, if so skip */ + if (!(dev->res.mem_resource[idx].flags & IORESOURCE_AUTO)) { + dev_dbg(&dev->dev, " mem %d already set to 0x%llx-0x%llx " + "flags 0x%x\n", idx, (unsigned long long) *start, + (unsigned long long) *end, (int) *flags); + return 1; + } + /* set the initial values */ *flags |= rule->flags | IORESOURCE_MEM; *flags &= ~IORESOURCE_UNSET; @@ -93,6 +106,7 @@ if (!rule->size) { *flags |= IORESOURCE_DISABLED; + dev_dbg(&dev->dev, " mem %d disabled\n", idx); return 1; /* skip disabled resource requests */ } @@ -103,9 +117,13 @@ while (!pnp_check_mem(dev, idx)) { *start += rule->align; *end = *start + rule->size - 1; - if (*start > rule->max || !rule->align) + if (*start > rule->max || !rule->align) { + dev_dbg(&dev->dev, " couldn't assign mem %d\n", idx); return 0; + } } + dev_dbg(&dev->dev, " assign mem %d 0x%llx-0x%llx\n", idx, + (unsigned long long) *start, (unsigned long long) *end); return 1; } @@ -126,20 +144,24 @@ return 1; } - /* check if this resource has been manually set, if so skip */ - if (!(dev->res.irq_resource[idx].flags & IORESOURCE_AUTO)) - return 1; - start = &dev->res.irq_resource[idx].start; end = &dev->res.irq_resource[idx].end; flags = &dev->res.irq_resource[idx].flags; + /* check if this resource has been manually set, if so skip */ + if (!(dev->res.irq_resource[idx].flags & IORESOURCE_AUTO)) { + dev_dbg(&dev->dev, " irq %d already set to %d flags 0x%x\n", + idx, (int) *start, (int) *flags); + return 1; + } + /* set the initial values */ *flags |= rule->flags | IORESOURCE_IRQ; *flags &= ~IORESOURCE_UNSET; if (bitmap_empty(rule->map, PNP_IRQ_NR)) { *flags |= IORESOURCE_DISABLED; + dev_dbg(&dev->dev, " irq %d disabled\n", idx); return 1; /* skip disabled resource requests */ } @@ -147,15 +169,20 @@ *start = find_next_bit(rule->map, PNP_IRQ_NR, 16); if (*start < PNP_IRQ_NR) { *end = *start; + dev_dbg(&dev->dev, " assign irq %d %d\n", idx, (int) *start); return 1; } for (i = 0; i < 16; i++) { if (test_bit(xtab[i], rule->map)) { *start = *end = xtab[i]; - if (pnp_check_irq(dev, idx)) + if (pnp_check_irq(dev, idx)) { + dev_dbg(&dev->dev, " assign irq %d %d\n", idx, + (int) *start); return 1; + } } } + dev_dbg(&dev->dev, " couldn't assign irq %d\n", idx); return 0; } @@ -175,14 +202,17 @@ return; } - /* check if this resource has been manually set, if so skip */ - if (!(dev->res.dma_resource[idx].flags & IORESOURCE_AUTO)) - return; - start = &dev->res.dma_resource[idx].start; end = &dev->res.dma_resource[idx].end; flags = &dev->res.dma_resource[idx].flags; + /* check if this resource has been manually set, if so skip */ + if (!(dev->res.dma_resource[idx].flags & IORESOURCE_AUTO)) { + dev_dbg(&dev->dev, " dma %d already set to %d flags 0x%x\n", + idx, (int) *start, (int) *flags); + return; + } + /* set the initial values */ *flags |= rule->flags | IORESOURCE_DMA; *flags &= ~IORESOURCE_UNSET; @@ -190,14 +220,18 @@ for (i = 0; i < 8; i++) { if (rule->map & (1 << xtab[i])) { *start = *end = xtab[i]; - if (pnp_check_dma(dev, idx)) + if (pnp_check_dma(dev, idx)) { + dev_dbg(&dev->dev, " assign dma %d %d\n", idx, + (int) *start); return; + } } } #ifdef MAX_DMA_CHANNELS *start = *end = MAX_DMA_CHANNELS; #endif *flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED; + dev_dbg(&dev->dev, " disable dma %d\n", idx); } /** @@ -298,9 +332,11 @@ if (!pnp_can_configure(dev)) return -ENODEV; + dbg_pnp_show_resources(dev, "before pnp_assign_resources"); mutex_lock(&pnp_res_mutex); pnp_clean_resource_table(&dev->res); /* start with a fresh slate */ if (dev->independent) { + dev_dbg(&dev->dev, "assigning independent options\n"); port = dev->independent->port; mem = dev->independent->mem; irq = dev->independent->irq; @@ -333,6 +369,8 @@ if (depnum) { struct pnp_option *dep; int i; + + dev_dbg(&dev->dev, "assigning dependent option %d\n", depnum); for (i = 1, dep = dev->dependent; i < depnum; i++, dep = dep->next) if (!dep) @@ -368,11 +406,13 @@ goto fail; mutex_unlock(&pnp_res_mutex); + dbg_pnp_show_resources(dev, "after pnp_assign_resources"); return 1; fail: pnp_clean_resource_table(&dev->res); mutex_unlock(&pnp_res_mutex); + dbg_pnp_show_resources(dev, "after pnp_assign_resources (failed)"); return 0; } @@ -473,6 +513,7 @@ return -EINVAL; } + dbg_pnp_show_resources(dev, "pnp_start_dev"); if (dev->protocol->set(dev) < 0) { dev_err(&dev->dev, "activation failed\n"); return -EIO; -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/