diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/staging/altpciechdma/altpciechdma.c | 64 |
1 files changed, 31 insertions, 33 deletions
diff --git a/drivers/staging/altpciechdma/altpciechdma.c b/drivers/staging/altpciechdma/altpciechdma.c index 27059bc..df685a9 100644 --- a/drivers/staging/altpciechdma/altpciechdma.c +++ b/drivers/staging/altpciechdma/altpciechdma.c @@ -312,15 +312,16 @@ static int __devinit map_bars(struct ape_dev *ape, struct pci_dev *dev) continue; /* do not map BARs with address 0 */ if (!bar_start || !bar_end) { - printk(KERN_DEBUG "BAR #%d is not present?!\n", i); + printk(KERN_DEBUG "BAR #%d is not present?!\n", i); rc = -1; goto fail; } bar_length = bar_end - bar_start + 1; /* BAR length is less than driver requires? */ if (bar_length < bar_min_len[i]) { - printk(KERN_DEBUG "BAR #%d length = %lu bytes but driver " - "requires at least %lu bytes\n", i, bar_length, bar_min_len[i]); + printk(KERN_DEBUG "BAR #%d length = %lu bytes but driver " + "requires at least %lu bytes\n", + i, bar_length, bar_min_len[i]); rc = -1; goto fail; } @@ -332,8 +333,8 @@ static int __devinit map_bars(struct ape_dev *ape, struct pci_dev *dev) rc = -1; goto fail; } - printk(KERN_DEBUG "BAR[%d] mapped at 0x%p with length %lu(/%lu).\n", i, - ape->bar[i], bar_min_len[i], bar_length); + printk(KERN_DEBUG "BAR[%d] mapped at 0x%p with length %lu(/%lu).\n", i, + ape->bar[i], bar_min_len[i], bar_length); } /* succesfully mapped all required BAR regions */ rc = 0; @@ -466,15 +467,14 @@ static inline int compare(u32 *p, u32 *q, int len) } else { fail++; /* show the first few miscompares */ - if (fail < 10) { - printk(KERN_DEBUG "[%p] = 0x%08x != [%p] = 0x%08x ?!\n", p, *p, q, *q); - /* but stop after a while */ - } else if (fail == 10) { - printk(KERN_DEBUG "---more errors follow! not printed---\n"); - } else { + if (fail < 10) + printk(KERN_DEBUG "[%p] = 0x%08x != [%p] = 0x%08x ?!\n", p, *p, q, *q); + /* but stop after a while */ + else if (fail == 10) + printk(KERN_DEBUG "---more errors follow! not printed---\n"); + else /* stop compare after this many errors */ - break; - } + break; } p++; q++; @@ -527,7 +527,7 @@ static int __devinit dma_test(struct ape_dev *ape, struct pci_dev *dev) printk(KERN_DEBUG "ape->table_virt = 0x%p.\n", ape->table_virt); if (!write_header || !read_header || !ape->table_virt) - goto fail; + goto fail; /* allocate and map coherently-cached memory for a DMA-able buffer */ /* @see Documentation/PCI/PCI-DMA-mapping.txt, near line 318 */ @@ -564,9 +564,8 @@ static int __devinit dma_test(struct ape_dev *ape, struct pci_dev *dev) /* read 8192 bytes from RC buffer to EP address 4096 */ ape_chdma_desc_set(&ape->table_virt->desc[n], buffer_bus, 4096, 2 * PAGE_SIZE); #if 1 - for (i = 0; i < 255; i++) { + for (i = 0; i < 255; i++) ape_chdma_desc_set(&ape->table_virt->desc[i], buffer_bus, 4096, 2 * PAGE_SIZE); - } /* index of last descriptor */ n = i - 1; #endif @@ -646,7 +645,7 @@ static int __devinit dma_test(struct ape_dev *ape, struct pci_dev *dev) printk(KERN_DEBUG "EPLAST = %u, n = %d\n", eplast, n); if (eplast == n) { printk(KERN_DEBUG "DONE\n"); - /* print IRQ count before the transfer */ + /* print IRQ count before the transfer */ printk(KERN_DEBUG "#IRQs during transfer: %d\n", ape->irq_count - irq_count); break; } @@ -660,9 +659,9 @@ static int __devinit dma_test(struct ape_dev *ape, struct pci_dev *dev) n = 0; ape_chdma_desc_set(&ape->table_virt->desc[n], buffer_bus + 8192, 4096, 2 * PAGE_SIZE); #if 1 - for (i = 0; i < 255; i++) { + for (i = 0; i < 255; i++) ape_chdma_desc_set(&ape->table_virt->desc[i], buffer_bus + 8192, 4096, 2 * PAGE_SIZE); - } + /* index of last descriptor */ n = i - 1; #endif @@ -690,7 +689,7 @@ static int __devinit dma_test(struct ape_dev *ape, struct pci_dev *dev) w = (u32)(n + 1); /* enable updates of eplast for each descriptor completion */ w |= (u32)(1UL << 18)/*global EPLAST_EN*/; -#if 0 // test variable, make a module option later +#if 0 /* test variable, make a module option later */ /* enable MSI for each descriptor completion */ if (ape->msi_enabled) w |= (1UL << 17)/*global MSI*/; @@ -714,7 +713,7 @@ static int __devinit dma_test(struct ape_dev *ape, struct pci_dev *dev) /** memory write barrier */ wmb(); /** dummy read to flush posted writes */ - //(void)ioread32(); + /* (void) ioread32(); */ printk(KERN_DEBUG "POLL FOR WRITE:\n"); /* poll for completion, 1000 times 1 millisecond */ @@ -843,7 +842,7 @@ static int __devinit probe(struct pci_dev *dev, const struct pci_device_id *id) } ape->got_regions = 1; -#if 1 // @todo For now, disable 64-bit, because I do not understand the implications (DAC!) +#if 1 /* @todo For now, disable 64-bit, because I do not understand the implications (DAC!) */ /* query for DMA transfer */ /* @see Documentation/PCI/PCI-DMA-mapping.txt */ if (!pci_set_dma_mask(dev, DMA_64BIT_MASK)) { @@ -1048,10 +1047,9 @@ static ssize_t sg_write(struct file *file, const char __user *buf, size_t count, printk(KERN_DEBUG DRV_NAME "_write(buf=0x%p, count=%lld, pos=%llu)\n", buf, (s64)count, (u64)*pos); /* TODO transfer boundaries at PAGE_SIZE granularity */ - while (remaining > 0) - { + while (remaining > 0) { /* limit DMA transfer size */ - transfer_len = (remaining < APE_CHDMA_MAX_TRANSFER_LEN)? remaining: + transfer_len = (remaining < APE_CHDMA_MAX_TRANSFER_LEN) ? remaining : APE_CHDMA_MAX_TRANSFER_LEN; /* get all user space buffer pages and create a scattergather list */ sgm_map_user_pages(ape->sgm, transfer_addr, transfer_len, 0/*read from userspace*/); @@ -1085,12 +1083,12 @@ static ssize_t sg_write(struct file *file, const char __user *buf, size_t count, /* * character device file operations */ -static struct file_operations sg_fops = { - .owner = THIS_MODULE, - .open = sg_open, - .release = sg_close, - .read = sg_read, - .write = sg_write, +static const struct file_operations sg_fops = { + .owner = THIS_MODULE, + .open = sg_open, + .release = sg_close, + .read = sg_read, + .write = sg_write, }; /* sg_init() - Initialize character device @@ -1158,12 +1156,12 @@ static struct pci_driver pci_driver = { */ static int __init alterapciechdma_init(void) { - int rc = 0; + int rc = 0; printk(KERN_DEBUG DRV_NAME " init(), built at " __DATE__ " " __TIME__ "\n"); /* register this driver with the PCI bus driver */ rc = pci_register_driver(&pci_driver); if (rc < 0) - return rc; + return rc; return 0; } |