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Message-ID: <ca0148c30810012337r52239b79ua524a02d04a1e45e@mail.gmail.com>
Date: Thu, 2 Oct 2008 09:37:05 +0300
From: "Matti Linnanvuori" <mattilinn@...il.com>
To: "Jeff Garzik" <jgarzik@...ox.com>, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [patch v1.2.35] WAN: add driver retina
From: Matti Linnanvuori <matti.linnanvuori@...om.com>
Retina G.703 and G.SHDSL driver.
Signed-off-by: Matti Linnanvuori <matti.linnanvuori@...om.com>
---
This patch is on top of jgarzik's netdev-2.6.git retina branch, also in URL:
http://groups.google.com/group/pcidriver/web/retina.patch
This patch replaces an erroneous io_remap_pfn_range call with
an remap_pfn_range call.
--- linux/drivers/net/wan/retina.c 2008-10-02 09:32:42.187347800 +0300
+++ linux-next/drivers/net/wan/retina.c 2008-10-02 09:32:00.950651800 +0300
@@ -40,12 +40,11 @@
#define TX_FIFO_THRESHOLD_STREAM_MODE 0x7
#define TX_DESC_THRESHOLD_STREAM_MODE 0x1
-#define RETINA_MRU 2000
-#define RETINA_DMA_SIZE (RETINA_MRU + 4)
+#define RETINA_MRU 2000u
+#define RETINA_DMA_SIZE (RETINA_MRU + 4u)
-static const char fepci_name[] = "retina";
+static char fepci_name[] = "retina";
static const char fepci_alarm_manager_name[] = "retina alarm manager";
-static const char fepci_NAME[] = "RETINA";
static const char fepci_netdev_name[] = "dcpxx";
static unsigned int find_cnt;
@@ -79,7 +78,7 @@ static unsigned int find_cnt;
#include <asm/pgtable.h>
-MODULE_VERSION("1.2.31");
+MODULE_VERSION("1.2.35");
/* PCI I/O space extent */
enum { FEPCI_SIZE = 0x20000 };
@@ -160,7 +159,7 @@ struct fepci_card_private {
wait_queue_head_t stream_both_q;
};
-enum {
+enum retina_semaphore {
RETINA_IDLE = 0,
RETINA_IN_USE = 7,
RETINA_RESERVED_UCTRL = 0x80,
@@ -208,18 +207,24 @@ enum reg_transmit_control {
};
enum int_bits {
- MaskFrameReceived = 0x01, MaskRxFifoError =
- 0x02, MaskRxFrameDroppedError = 0x04,
- MaskFrameTransmitted = 0x40, MaskTxFifoError = 0x80,
+ MaskFrameReceived = 0x01,
+ MaskRxFifoError = 0x02,
+ MaskRxFrameDroppedError = 0x04,
+ MaskFrameTransmitted = 0x40,
+ MaskTxFifoError = 0x80,
MaskAllInts = 0xc7,
- IntrFrameReceived = 0x01, IntrRxFifoError =
- 0x02, IntrRxFrameDroppedError = 0x04,
- IntrFrameTransmitted = 0x40, IntrTxFifoError = 0x80,
+ IntrFrameReceived = 0x01,
+ IntrRxFifoError = 0x02,
+ IntrRxFrameDroppedError = 0x04,
+ IntrFrameTransmitted = 0x40,
+ IntrTxFifoError = 0x80,
IntrAllInts = 0xc7,
};
-/* The FEPCI Rx and Tx buffer descriptors
- * Elements are written as 32 bit for endian portability */
+/**
+ * The reception and transmission buffer descriptors.
+ * Elements are written as 32 bit for endian portability.
+ **/
struct fepci_desc {
u32 desc_a;
@@ -237,8 +242,8 @@ enum desc_b_bits {
transfer_not_done = 0x80000000,
};
-/* global variables (common to whole driver, all the cards): */
-static int major; /* char device major number */
+/* Global variables (common to whole driver, all the cards): */
+static int major; /* character device major number */
static struct fepci_card_private **card_privates;
static unsigned long stream_pointers;
@@ -246,10 +251,10 @@ static void set_int_mask(unsigned char c
struct fepci_card_private *cp)
{
uint8_t __iomem *address = cp->ioaddr + reg_first_int_mask;
- const unsigned shift = 8 * channel;
+ const unsigned shift = 8u * channel;
uint32_t oldvalue = readl(address);
- oldvalue &= ~(0xff << shift); /* clear bits */
- oldvalue |= value << shift; /* set bits */
+ oldvalue &= ~(0xff << shift); /* Clear bits. */
+ oldvalue |= value << shift; /* Set bits. */
writel(oldvalue, address);
}
@@ -263,7 +268,7 @@ static inline unsigned get_int_status(un
uint8_t __iomem *ioaddr)
{
const uint32_t oldvalue = readl(ioaddr + reg_first_int_status);
- return (oldvalue >> (8 * channel)) & 0xff; /* clear other bits */
+ return (oldvalue >> (8 * channel)) & 0xff; /* Clear other bits. */
}
static void fillregisterswith_00(uint8_t __iomem *ioaddr)
@@ -279,7 +284,6 @@ static void fillregisterswith_00(uint8_t
static int fepci_open(struct net_device *dev);
static void fepci_timer(unsigned long data);
static void fepci_tx_timeout(struct net_device *dev);
-static void fepci_init_ring(struct net_device *dev);
static int fepci_start_xmit(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t fepci_interrupt(int irq, void *dev_instance);
static int fepci_close(struct net_device *dev);
@@ -380,44 +384,41 @@ static int fepci_char_mmap(struct file *
{
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
unsigned long size = vma->vm_end - vma->vm_start;
- unsigned long virtual_address = 0;
- unsigned pfn;
-
- vma->vm_flags |= VM_IO | VM_RESERVED;
- vma->vm_file = filp;
+ unsigned long virtual_address;
+ unsigned long pfn;
+ struct fepci_card_private *device = filp->private_data;
if (offset == STREAM_BUFFER_POINTER_AREA) {
virtual_address = stream_pointers;
- if (size > (1 << PAGE_SHIFT)) {
- printk(KERN_WARNING
- "%s: mmap: area size over range.\n", fepci_name);
+ if (size > (1ul << PAGE_SHIFT)) {
+ dev_warn(&device->pci_dev->dev,
+ "mmap: area size over range\n");
return -EINVAL;
}
} else {
- unsigned int channel = (offset >> CHANNEL_ADDRESS_SHIFT) & 0xf;
- /* 0 = rx, 1 = tx */
- unsigned int area = (offset >> AREA_ADDRESS_SHIFT) & 0xf;
- struct fepci_card_private *device = filp->private_data;
+ unsigned long channel = (offset >> CHANNEL_ADDRESS_SHIFT) & 0xf;
+ /* 0 = reception, 1 = transmission */
+ unsigned long area = (offset >> AREA_ADDRESS_SHIFT) & 0xf;
if (unlikely(device->removed))
goto INVALID;
- if (area == 0) {
- virtual_address = (unsigned long)device->
- ch_privates[channel]->rx_buffer;
- } else if (area == 1) {
- virtual_address = (unsigned long)device->
- ch_privates[channel]->tx_buffer;
+ if (area == 0ul) {
+ virtual_address = (unsigned long)
+ device->ch_privates[channel]->rx_buffer;
+ } else if (area == 1ul) {
+ virtual_address = (unsigned long)
+ device->ch_privates[channel]->tx_buffer;
} else {
INVALID:
return -EINVAL;
}
- if (unlikely(virtual_address == 0))
+ if (unlikely(virtual_address == 0ul))
goto INVALID;
}
-
+ vma->vm_file = filp;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
pfn = PFN_DOWN(virt_to_phys((void *)virtual_address));
- return io_remap_pfn_range(vma, vma->vm_start, pfn, size,
- vma->vm_page_prot);
+ return remap_pfn_range(vma, vma->vm_start, pfn, size,
+ vma->vm_page_prot);
}
/* mmap operations end */
@@ -428,27 +429,27 @@ static int fepci_copy_to_user(unsigned l
unsigned len, bool shrink)
{
if (shrink) {
- unsigned int i;
- for (i = 0; i < len; i += 2) {
- uint32_t longword = readl_relaxed(from + i / 2 *
+ unsigned int w;
+ for (w = 0u; w < len; w += 2) {
+ uint32_t longword = readl_relaxed(from + w / 2u *
sizeof(u32));
int error = __put_user(longword,
(unsigned char __user *)
- (to + i));
+ (to + w));
if (unlikely(error))
return error;
error = __put_user(longword >> 8,
(unsigned char __user *)
- (to + i + 1));
+ (to + w + 1));
if (unlikely(error))
return error;
}
} else {
- unsigned int i;
- for (i = 0; i < len; i += 4) {
- uint32_t longword = readl_relaxed(from + i);
+ unsigned int w;
+ for (w = 0u; w < len; w += 4u) {
+ uint32_t longword = readl_relaxed(from + w);
int error = __put_user(longword,
- (uint32_t __user *)(to + i));
+ (uint32_t __user *)(to + w));
if (unlikely(error))
return error;
}
@@ -460,47 +461,47 @@ static int fepci_copy_from_user(uint8_t
unsigned len, bool enlarge)
{
if (enlarge) {
- unsigned int i;
- for (i = 0; i < len; i += 2) {
+ unsigned int w;
+ for (w = 0u; w < len; w += 2u) {
unsigned char temp1;
unsigned char temp2;
int error = __get_user(temp1,
(unsigned char __user *)
- (from + i));
+ (from + w));
if (unlikely(error))
return error;
error = __get_user(temp2,
(unsigned char __user *)
- (from + i + 1));
+ (from + w + 1u));
if (unlikely(error))
return error;
- writel(temp1 + (temp2 << 8), to + i * 2);
+ writel(temp1 + (temp2 << 8), to + w * 2u);
}
} else {
- unsigned int i;
- for (i = 0; i < len; i += 4) {
+ unsigned int w;
+ for (w = 0u; w < len; w += 4u) {
uint32_t longword;
int error = __get_user(longword,
- (u32 __user *)(from + i));
+ (u32 __user *)(from + w));
if (unlikely(error))
return error;
- writel(longword, to + i);
+ writel(longword, to + w);
}
}
return 0;
}
-static unsigned get_semafore(struct fepci_real_mailbox __iomem *mailbox)
+static
+enum retina_semaphore get_semafore(struct fepci_real_mailbox __iomem *mailbox)
{
- unsigned semafore = readb_relaxed(&mailbox->Semafore_Mail_number);
- return semafore;
+ return readb_relaxed(&mailbox->Semafore_Mail_number);
}
static void set_semafore(struct fepci_real_mailbox __iomem *mailbox,
- unsigned semafore)
+ enum retina_semaphore value)
{
uint32_t number = readl_relaxed(&mailbox->Semafore_Mail_number);
- number = ((number & ~0xFF) | semafore) + (1 << 8);
+ number = ((number & ~0xFF) | value) + (1u << 8);
writel(number, &mailbox->Semafore_Mail_number);
}
@@ -513,12 +514,8 @@ static int fepci_char_ioctl(struct inode
int retval = 0;
struct fepci_card_private *card = filp->private_data;
- if (unlikely(card->removed)) {
- printk(KERN_WARNING
- "%s: trying to access a card that does not exist\n",
- fepci_NAME);
+ if (unlikely(card->removed))
return -ENXIO;
- }
if (_IOC_DIR(cmd) & _IOC_READ)
if (unlikely(!access_ok(VERIFY_WRITE, (void __user *)arg,
@@ -535,13 +532,14 @@ static int fepci_char_ioctl(struct inode
switch (cmd) {
case FEPCI_IOCTL_STREAM_TRANSMIT_POLL:
- /* here: arg == channel number */
- if (unlikely(arg < 0 || arg >= CHANNELS
- || !(card->ch_privates[arg]->stream_on)))
+ /* Here: arg == channel number. */
+ if (unlikely(arg >= CHANNELS ||
+ !(card->ch_privates[arg]->stream_on))) {
return 0x2;
- {
- u32 pointer = *USER_TX_S_FAKE_POINTER(minor, arg,
- stream_pointers);
+ } else {
+ unsigned long pointer =
+ *USER_TX_S_FAKE_POINTER(minor, arg,
+ stream_pointers);
wait_event_interruptible(card->stream_transmit_q,
(pointer !=
*USER_TX_S_FAKE_POINTER
@@ -551,13 +549,14 @@ static int fepci_char_ioctl(struct inode
}
return retval;
case FEPCI_IOCTL_STREAM_RECEIVE_POLL:
- /* here: arg == channel number */
- if (unlikely(arg < 0 || arg >= CHANNELS
- || !(card->ch_privates[arg]->stream_on)))
+ /* Here: arg == channel number. */
+ if (unlikely(arg >= CHANNELS ||
+ !(card->ch_privates[arg]->stream_on))) {
return 0x2;
- {
- u32 pointer = *USER_RX_S_FAKE_POINTER(minor, arg,
- stream_pointers);
+ } else {
+ unsigned long pointer =
+ *USER_RX_S_FAKE_POINTER(minor, arg,
+ stream_pointers);
wait_event_interruptible(card->stream_receive_q,
(pointer !=
*USER_RX_S_FAKE_POINTER
@@ -567,15 +566,15 @@ static int fepci_char_ioctl(struct inode
}
return retval;
case FEPCI_IOCTL_STREAM_BOTH_POLL:
- /* here: arg == channel number */
- if (unlikely(arg < 0 || arg >= CHANNELS
- || !(card->ch_privates[arg]->stream_on)))
+ /* Here: arg == channel number. */
+ if (unlikely(arg >= CHANNELS ||
+ !(card->ch_privates[arg]->stream_on))) {
return 0x2;
- {
- u32 temp_tx_pointer =
+ } else {
+ unsigned long temp_tx_pointer =
*USER_TX_S_FAKE_POINTER(minor, arg,
stream_pointers);
- u32 temp_rx_pointer =
+ unsigned long temp_rx_pointer =
*USER_RX_S_FAKE_POINTER(minor, arg,
stream_pointers);
wait_event_interruptible(card->stream_both_q,
@@ -592,31 +591,31 @@ static int fepci_char_ioctl(struct inode
case FEPCI_IOCTL_R_SHARED_MEM:
retval = fepci_copy_to_user(arg,
ioaddr + FEPCI_SHARED_MEM_OFFSETT,
- _IOC_SIZE(cmd), 0);
+ _IOC_SIZE(cmd), false);
break;
case FEPCI_IOCTL_W_SHARED_MEM:
retval = fepci_copy_from_user(ioaddr + FEPCI_SHARED_MEM_OFFSETT,
- arg, _IOC_SIZE(cmd), 0);
+ arg, _IOC_SIZE(cmd), false);
break;
case FEPCI_IOCTL_G_IDENTIFICATION:
retval = fepci_copy_to_user(arg,
ioaddr +
FEPCI_IDENTIFICATION_OFFSETT,
- _IOC_SIZE(cmd), 1);
+ _IOC_SIZE(cmd), true);
break;
case FEPCI_IOCTL_G_FEATURES:
retval = fepci_copy_to_user(arg, ioaddr +
FEPCI_FEATURES_OFFSETT,
- _IOC_SIZE(cmd), 1);
+ _IOC_SIZE(cmd), true);
break;
case FEPCI_IOCTL_G_SETTINGS:
retval = fepci_copy_to_user(arg, ioaddr +
FEPCI_SETTINGS_OFFSETT,
- _IOC_SIZE(cmd), 1);
+ _IOC_SIZE(cmd), true);
break;
case FEPCI_IOCTL_G_STATUS:
retval = fepci_copy_to_user(arg, ioaddr + FEPCI_STATUS_OFFSETT,
- _IOC_SIZE(cmd), 1);
+ _IOC_SIZE(cmd), true);
break;
case FEPCI_IOCTL_B_POLL:
mutex_lock(&card->mutex);
@@ -628,7 +627,7 @@ static int fepci_char_ioctl(struct inode
if (get_semafore(real_mailbox) == RETINA_IDLE) {
set_semafore(real_mailbox, RETINA_RESERVED_PC);
get_semafore(real_mailbox); /* Wait for write. */
- msleep(1); /* delay at least 1 millisecond */
+ msleep(1u); /* Delay at least 1 millisecond. */
switch (get_semafore(real_mailbox)) {
case RETINA_RESERVED_PC:
retval = 0;
@@ -681,11 +680,14 @@ static int fepci_char_ioctl(struct inode
case RETINA_RESERVED_PC:
case RETINA_READY_PC_REPLY:
case RETINA_READY_PC:
- /* copy the mailbox */
+ if (unlikely(_IOC_SIZE(cmd) <= 2u))
+ goto DEFAULT;
+ /* Copy the mailbox. */
retval = fepci_copy_from_user(ioaddr +
- FEPCI_MAILBOX_OFFSETT + 4,
- arg + 2, _IOC_SIZE(cmd) - 2, 1);
- /* semafore -> 10 */
+ FEPCI_MAILBOX_OFFSETT + 4u,
+ arg + 2ul, _IOC_SIZE(cmd) - 2u,
+ true);
+ /* Semaphore -> 10. */
set_semafore(real_mailbox, RETINA_READY_UCTRL);
break;
case RETINA_READY_UCTRL:
@@ -707,12 +709,15 @@ static int fepci_char_ioctl(struct inode
case RETINA_RESERVED_PC:
case RETINA_READY_PC_REPLY:
case RETINA_READY_PC:
- /* copy the mailbox; */
+ if (unlikely(_IOC_SIZE(cmd) <= 2u))
+ goto DEFAULT;
+ /* Copy the mailbox; */
retval = fepci_copy_from_user(ioaddr +
- FEPCI_MAILBOX_OFFSETT + 4,
- arg + 2, _IOC_SIZE(cmd) - 2, 1);
- /* semafore -> 11 */
- set_semafore(real_mailbox, 0x11);
+ FEPCI_MAILBOX_OFFSETT + 4u,
+ arg + 2ul, _IOC_SIZE(cmd) - 2u,
+ true);
+ /* Semaphore -> 11 */
+ set_semafore(real_mailbox, RETINA_READY_UCTRL_REPLY);
break;
case RETINA_READY_UCTRL:
case RETINA_READY_UCTRL_REPLY:
@@ -723,7 +728,7 @@ static int fepci_char_ioctl(struct inode
retval = 0x3;
break;
default:
- retval = 0xff;
+DEFAULT: retval = 0xff;
}
mutex_unlock(&card->mutex);
break;
@@ -741,7 +746,7 @@ static int fepci_char_ioctl(struct inode
retval = fepci_copy_to_user(arg,
ioaddr +
FEPCI_MAILBOX_OFFSETT,
- _IOC_SIZE(cmd), 1);
+ _IOC_SIZE(cmd), true);
break;
case RETINA_IDLE:
retval = 0x3;
@@ -756,7 +761,7 @@ static int fepci_char_ioctl(struct inode
4, 1);
if (likely(retval == 0))
/* lowest byte = 0x7 */
- retval = __put_user(7, (char __user *)arg);
+ retval = __put_user(0x7, (char __user *)arg);
}
mutex_unlock(&card->mutex);
break;
@@ -767,7 +772,7 @@ static int fepci_char_ioctl(struct inode
mutex_lock(&card->mutex);
{
struct fepci_ch_private *fp =
- card->ch_privates[arg & 3];
+ card->ch_privates[arg & 3ul];
if (fp->in_stream_mode)
retval = -EBUSY;
else
@@ -779,7 +784,7 @@ static int fepci_char_ioctl(struct inode
mutex_lock(&card->mutex);
{
struct fepci_ch_private *fp =
- card->ch_privates[arg & 3];
+ card->ch_privates[arg & 3ul];
if (fp->in_stream_mode)
retval = -EBUSY;
else
@@ -794,8 +799,6 @@ static int fepci_char_ioctl(struct inode
case FEPCI_IOCTL_STREAM_CLOSE:
return fepci_stream_close(card, card->ch_privates[arg]);
default:
- dev_warn(&card->pci_dev->dev, "unknown ioctl command 0x%x\n",
- cmd);
return -ENOTTY;
}
return retval;
@@ -804,10 +807,10 @@ static int fepci_char_ioctl(struct inode
static int fepci_register_char_device(void)
{
int error =
- register_chrdev(0 /* dynamic */ , fepci_name, &fepci_char_fops);
+ register_chrdev(0u /* dynamic */, fepci_name, &fepci_char_fops);
if (unlikely(error < 0))
printk(KERN_WARNING
- "%s: unable to register char device\n", fepci_NAME);
+ "%s: unable to register char device\n", fepci_name);
return error;
}
@@ -836,12 +839,12 @@ static int fepci_stream_open(struct fepc
struct fepci_ch_private *fp)
{
unsigned tx_pages, rx_pages, tx_order, rx_order;
- unsigned int i;
+ unsigned int u;
mutex_lock(&cp->mutex);
if (unlikely(fp->in_eth_mode)) {
dev_warn(&fp->this_dev->dev,
- "Interface is in Ethernet mode, "
+ "Interface is in Ethernet mode: "
"cannot open stream interface\n");
mutex_unlock(&cp->mutex);
return -EBUSY;
@@ -856,9 +859,9 @@ static int fepci_stream_open(struct fepc
return -ENXIO;
}
- fp->bufsize = 1 << fp->bufsize_order;
+ fp->bufsize = 1u << fp->bufsize_order;
- if (unlikely(fp->fake_unit_sz_order < 5)) {
+ if (unlikely(fp->fake_unit_sz_order < 5u)) {
dev_warn(&fp->this_dev->dev,
"Unit size has to be at least 32 bytes\n");
INVALID:
@@ -877,29 +880,29 @@ INVALID:
else
fp->unit_sz_order = fp->fake_unit_sz_order;
- fp->fake_unit_sz = 1 << fp->fake_unit_sz_order;
- fp->unit_sz = 1 << fp->unit_sz_order;
- fp->units = 1 << (fp->bufsize_order - fp->unit_sz_order);
- fp->fake_units = 1 << (fp->bufsize_order - fp->fake_unit_sz_order);
+ fp->fake_unit_sz = 1u << fp->fake_unit_sz_order;
+ fp->unit_sz = 1u << fp->unit_sz_order;
+ fp->units = 1u << (fp->bufsize_order - fp->unit_sz_order);
+ fp->fake_units = 1u << (fp->bufsize_order - fp->fake_unit_sz_order);
/* Reserve memory. */
if (fp->bufsize_order < PAGE_SHIFT) {
- rx_order = 0;
- tx_order = 0;
- rx_pages = 1;
- tx_pages = 1;
+ rx_order = 0u;
+ tx_order = 0u;
+ rx_pages = 1u;
+ tx_pages = 1u;
} else {
tx_order = fp->bufsize_order - PAGE_SHIFT;
- tx_pages = 1 << tx_order;
- rx_order = tx_order + 1;
- rx_pages = 1 << rx_order;
- }
- fp->in_stream_mode = 1;
- fp->tx_buffer = (u32 *) __get_free_pages(GFP_KERNEL, tx_order);
- if (unlikely(!fp->tx_buffer))
+ tx_pages = 1u << tx_order;
+ rx_order = tx_order + 1u;
+ rx_pages = 1u << rx_order;
+ }
+ fp->in_stream_mode = true;
+ fp->tx_buffer = (u32 *)__get_free_pages(GFP_KERNEL, tx_order);
+ if (unlikely(fp->tx_buffer == NULL))
goto NO_MEMORY;
- fp->rx_buffer = (u32 *) __get_free_pages(GFP_KERNEL, rx_order);
- if (unlikely(!fp->rx_buffer)) {
+ fp->rx_buffer = (u32 *)__get_free_pages(GFP_KERNEL, rx_order);
+ if (unlikely(fp->rx_buffer == NULL)) {
NO_MEMORY:
dev_warn(&fp->this_dev->dev,
"unable to allocate memory for buffers\n");
@@ -908,37 +911,31 @@ NO_MEMORY:
return -ENOMEM;
}
- for (i = 0; i < (fp->bufsize) / 4; i++)
- fp->tx_buffer[i] = 0xffffffff;
+ for (u = 0u; u < fp->bufsize / 4u; u++)
+ fp->tx_buffer[u] = 0xffffffff;
- /* + fp->channel_number; */
- *USER_RX_S_POINTER(cp->card_number, fp->channel_number,
- stream_pointers) = 0;
- /* + fp->channel_number; */
- *USER_TX_S_POINTER(cp->card_number, fp->channel_number,
- stream_pointers) = 0;
- /* + fp->channel_number; */
+ *USER_RX_S_POINTER(cp->card_number, fp->channel_number, stream_pointers)
+ = 0ul;
+ *USER_TX_S_POINTER(cp->card_number, fp->channel_number, stream_pointers)
+ = 0ul;
*USER_RX_S_FAKE_POINTER(cp->card_number,
- fp->channel_number, stream_pointers) = 0;
- /* + fp->channel_number; */
+ fp->channel_number, stream_pointers) = 0ul;
*USER_TX_S_FAKE_POINTER(cp->card_number,
- fp->channel_number, stream_pointers) = 0;
+ fp->channel_number, stream_pointers) = 0ul;
- /* Init ring buffers. */
- for (i = 0; i < MAX_RX_UNITS; i++)
- fp->rx_unit[i] =
- (u32 *) ((u32) (fp->rx_buffer) + (fp->unit_sz * i));
- for (i = 0; i < MAX_TX_UNITS; i++)
- fp->tx_unit[i] =
- (u32 *) ((u32) (fp->tx_buffer) + (fp->unit_sz * i));
-
- for (i = 0; i < RX_RING_SIZE; i++) {
- writel(0, &fp->rx_desc[i].desc_a);
- writel(0, &fp->rx_desc[i].desc_b);
- }
- for (i = 0; i < TX_RING_SIZE; i++) {
- writel(0, &fp->tx_desc[i].desc_a);
- writel(0, &fp->tx_desc[i].desc_b);
+ /* Init the ring buffers. */
+ for (u = 0u; u < MAX_RX_UNITS; u++)
+ fp->rx_unit[u] = fp->rx_buffer + fp->unit_sz * u / sizeof(u32);
+ for (u = 0u; u < MAX_TX_UNITS; u++)
+ fp->tx_unit[u] = fp->tx_buffer + fp->unit_sz * u / sizeof(u32);
+
+ for (u = 0u; u < RX_RING_SIZE; u++) {
+ writel(0u, &fp->rx_desc[u].desc_a);
+ writel(0u, &fp->rx_desc[u].desc_b);
+ }
+ for (u = 0u; u < TX_RING_SIZE; u++) {
+ writel(0u, &fp->tx_desc[u].desc_a);
+ writel(0u, &fp->tx_desc[u].desc_b);
}
mutex_unlock(&cp->mutex);
return 0;
@@ -974,13 +971,13 @@ static int fepci_stream_start(struct fep
}
}
- fp->stream_on = 1;
+ fp->stream_on = true;
/* Sending and receiving on, start from the beginning of the buffer. */
- fp->cur_tx_unit = 0;
- fp->cur_rx_unit = 0;
- fp->cur_tx = 0;
- fp->cur_rx = 0;
+ fp->cur_tx_unit = 0u;
+ fp->cur_rx_unit = 0u;
+ fp->cur_tx = 0u;
+ fp->cur_rx = 0u;
/* All the descriptors ready to go: */
for (i = 0; i < min(RX_RING_SIZE, TX_RING_SIZE); i++) {
@@ -990,7 +987,7 @@ static int fepci_stream_start(struct fep
i) % fp->units],
fp->unit_sz,
PCI_DMA_FROMDEVICE);
- if (unlikely(pci_dma_mapping_error(address))) {
+ if (unlikely(pci_dma_mapping_error(cp->pci_dev, address))) {
dev_warn(&dev->dev,
"failed to map reception DMA buffer\n");
} else {
@@ -1006,7 +1003,7 @@ static int fepci_stream_start(struct fep
fp->tx_unit[(fp->cur_tx_unit + i) %
fp->units], fp->unit_sz,
PCI_DMA_TODEVICE);
- if (unlikely(pci_dma_mapping_error(address))) {
+ if (unlikely(pci_dma_mapping_error(cp->pci_dev, address))) {
dev_warn(&dev->dev,
"failed to map transmission DMA buffer\n");
} else {
@@ -1043,9 +1040,9 @@ static inline void fepci_stream_stop(str
struct fepci_ch_private *fp)
{
uint8_t __iomem *ioaddr = cp->ioaddr;
- unsigned i = min(RX_RING_SIZE, TX_RING_SIZE) - 1;
+ unsigned d = min(RX_RING_SIZE, TX_RING_SIZE) - 1;
struct net_device *dev = fp->this_dev;
- fp->stream_on = 0;
+ fp->stream_on = false;
/* Stop Rx and Tx channels. */
writel(0x0, ioaddr + fp->reg_rxctrl);
writel(0x0, ioaddr + fp->reg_txctrl);
@@ -1057,18 +1054,18 @@ static inline void fepci_stream_stop(str
free_irq(dev->irq, dev);
do {
- if (likely(!pci_dma_mapping_error(
- pci_unmap_addr(fp->rx + i, address))))
+ if (likely(!pci_dma_mapping_error(cp->pci_dev,
+ pci_unmap_addr(fp->rx + d, address))))
pci_unmap_single(cp->pci_dev,
- pci_unmap_addr(fp->rx + i, address),
+ pci_unmap_addr(fp->rx + d, address),
fp->unit_sz,
PCI_DMA_FROMDEVICE);
- if (likely(!pci_dma_mapping_error(
- pci_unmap_addr(fp->tx + i, address))))
+ if (likely(!pci_dma_mapping_error(cp->pci_dev,
+ pci_unmap_addr(fp->tx + d, address))))
pci_unmap_single(cp->pci_dev,
- pci_unmap_addr(fp->tx + i, address),
+ pci_unmap_addr(fp->tx + d, address),
fp->unit_sz, PCI_DMA_TODEVICE);
- } while (i--);
+ } while (d--);
}
static int fepci_stream_close_down(struct fepci_card_private *cp,
@@ -1080,15 +1077,15 @@ static int fepci_stream_close_down(struc
fepci_stream_stop(cp, fp);
/* release memory */
if (fp->bufsize_order < PAGE_SHIFT) {
- rx_order = 0;
- tx_order = 0;
- rx_pages = 1;
- tx_pages = 1;
+ rx_order = 0u;
+ tx_order = 0u;
+ rx_pages = 1u;
+ tx_pages = 1u;
} else {
- rx_order = (int)((fp->bufsize_order) - PAGE_SHIFT + 1);
- rx_pages = 1 << rx_order;
- tx_order = (int)((fp->bufsize_order) - PAGE_SHIFT);
- tx_pages = 1 << tx_order;
+ rx_order = fp->bufsize_order - PAGE_SHIFT + 1u;
+ rx_pages = 1u << rx_order;
+ tx_order = fp->bufsize_order - PAGE_SHIFT;
+ tx_pages = 1u << tx_order;
}
if (fp->rx_buffer) {
free_pages((unsigned long)fp->rx_buffer, rx_order);
@@ -1098,7 +1095,7 @@ static int fepci_stream_close_down(struc
free_pages((unsigned long)fp->tx_buffer, tx_order);
fp->tx_buffer = NULL;
}
- fp->in_stream_mode = 0;
+ fp->in_stream_mode = false;
return 0;
}
@@ -1116,21 +1113,21 @@ static irqreturn_t fepci_stream_interrup
if (!intr_status)
return IRQ_NONE;
clear_int(channel, intr_status, ioaddr);
- /* First update cur_rx, and do stuff if it has moved
- (+ packets have been received). */
temp_rx = fp->cur_rx;
- while ((readl(&fp->rx_desc[fp->cur_rx].desc_b) &
- transfer_not_done) == 0 /* has been received */
- /* Stop if made one round. */
- && temp_rx != ((fp->cur_rx + 1) & (RX_RING_SIZE - 1))) {
- if (likely(!pci_dma_mapping_error(
- pci_unmap_addr(fp->rx + fp->cur_rx, address))))
+ while (!(readl(&fp->rx_desc[fp->cur_rx].desc_b) & transfer_not_done)
+ /* Has been received. */ &&
+ /* Stop if made one round. */
+ temp_rx != ((fp->cur_rx + 1u) & (RX_RING_SIZE - 1u))) {
+ if (likely(!pci_dma_mapping_error(fp->this_card_priv->pci_dev,
+ pci_unmap_addr(fp->rx +
+ fp->cur_rx,
+ address))))
pci_unmap_single(fp->this_card_priv->pci_dev,
- pci_unmap_addr(fp->rx + fp->cur,
+ pci_unmap_addr(fp->rx + fp->cur_rx,
address),
fp->unit_sz, PCI_DMA_FROMDEVICE);
- fp->cur_rx = (fp->cur_rx + 1) & (RX_RING_SIZE - 1);
- fp->cur_rx_unit = (fp->cur_rx_unit + 1);
+ fp->cur_rx = (fp->cur_rx + 1u) & (RX_RING_SIZE - 1u);
+ fp->cur_rx_unit = (fp->cur_rx_unit + 1u);
fp->cur_rx_unit *= fp->cur_rx_unit < fp->units;
*USER_RX_S_POINTER(fp->this_card_priv->card_number,
fp->channel_number,
@@ -1142,13 +1139,13 @@ static irqreturn_t fepci_stream_interrup
wake_up_interruptible(&(fp->this_card_priv->stream_receive_q));
wake_up_interruptible(&(fp->this_card_priv->stream_both_q));
}
- /* from the first uninitialized descriptor to cur_rx */
- temp_rx = (fp->cur_rx + 1) & (RX_RING_SIZE - 1);
+ /* From the first uninitialized descriptor to cur_rx. */
+ temp_rx = (fp->cur_rx + 1u) & (RX_RING_SIZE - 1u);
temp_rx_unit = (fp->cur_rx_unit + 1);
temp_rx_unit *= temp_rx_unit < fp->units;
while (temp_rx != fp->cur_rx) {
uint32_t desc_b = readl(&fp->rx_desc[temp_rx].desc_b);
- if ((desc_b & transfer_not_done) == 0) {
+ if (!(desc_b & transfer_not_done)) {
dma_addr_t bus_address;
/* Update debug counters. */
if (unlikely(desc_b & fifo_error)) {
@@ -1166,7 +1163,9 @@ static irqreturn_t fepci_stream_interrup
pci_map_single(fp->this_card_priv->pci_dev,
fp->rx_unit[temp_rx_unit],
fp->unit_sz, PCI_DMA_FROMDEVICE);
- if (likely(!pci_dma_mapping_error(bus_address))) {
+ if (likely(!pci_dma_mapping_error(fp->this_card_priv->
+ pci_dev,
+ bus_address))) {
pci_unmap_addr_set(fp->rx + temp_rx, address,
bus_address);
writel(bus_address,
@@ -1178,27 +1177,26 @@ static irqreturn_t fepci_stream_interrup
"failed to map DMA for reception\n");
}
}
- temp_rx = (temp_rx + 1) & (RX_RING_SIZE - 1);
- temp_rx_unit = (temp_rx_unit + 1);
+ temp_rx = (temp_rx + 1u) & (RX_RING_SIZE - 1u);
+ temp_rx_unit = (temp_rx_unit + 1u);
temp_rx_unit *= temp_rx_unit < fp->units;
}
- /* first update cur_tx, and do stuff if it has moved
- (+ packets have been transmitted) */
temp_tx = fp->cur_tx;
- /* has been transmitted? */
- while ((readl_relaxed(&fp->tx_desc[fp->cur_tx].desc_b) &
- transfer_not_done) == 0
- /* stop if made one round */
- && temp_tx != ((fp->cur_tx + 1) & (TX_RING_SIZE - 1))) {
- if (likely(!pci_dma_mapping_error(
- pci_unmap_addr(fp->tx + fp->cur_tx, address))))
+ while (!(readl_relaxed(&fp->tx_desc[fp->cur_tx].desc_b) &
+ transfer_not_done) /* Has been transmitted. */ &&
+ /* Stop if made one round. */
+ temp_tx != ((fp->cur_tx + 1u) & (TX_RING_SIZE - 1u))) {
+ if (likely(!pci_dma_mapping_error(fp->this_card_priv->pci_dev,
+ pci_unmap_addr(fp->tx +
+ fp->cur_tx,
+ address))))
pci_unmap_single(fp->this_card_priv->pci_dev,
pci_unmap_addr(fp->tx + fp->cur_tx,
address),
fp->unit_sz, PCI_DMA_TODEVICE);
- fp->cur_tx = (fp->cur_tx + 1) & (TX_RING_SIZE - 1);
- fp->cur_tx_unit = (fp->cur_tx_unit + 1);
+ fp->cur_tx = (fp->cur_tx + 1u) & (TX_RING_SIZE - 1u);
+ fp->cur_tx_unit = (fp->cur_tx_unit + 1u);
fp->cur_tx_unit *= fp->cur_tx_unit < fp->units;
*USER_TX_S_POINTER(fp->this_card_priv->card_number,
fp->channel_number,
@@ -1214,24 +1212,26 @@ static irqreturn_t fepci_stream_interrup
stream_both_q));
}
- /* from the first uninitialized descriptor to cur_tx */
- temp_tx = (fp->cur_tx + 1) & (TX_RING_SIZE - 1);
- temp_tx_unit = (fp->cur_tx_unit + 1);
+ /* From the first uninitialized descriptor to cur_tx. */
+ temp_tx = (fp->cur_tx + 1u) & (TX_RING_SIZE - 1u);
+ temp_tx_unit = (fp->cur_tx_unit + 1u);
temp_tx_unit *= temp_tx_unit < fp->units;
while (temp_tx != fp->cur_tx) {
uint32_t desc_b = readl_relaxed(&fp->tx_desc[temp_tx].desc_b);
- if ((desc_b & transfer_not_done) == 0) {
+ if (!(desc_b & transfer_not_done)) {
dma_addr_t bus_address;
- /* update debug counters */
+ /* Update debug counters. */
if (unlikely(desc_b & fifo_error))
dev->stats.tx_fifo_errors++;
- /* initialize the descriptor for transfer */
+ /* Initialize the descriptor for transfer. */
bus_address =
pci_map_single(fp->this_card_priv->pci_dev,
fp->tx_unit[temp_tx_unit],
fp->unit_sz, PCI_DMA_TODEVICE);
- if (likely(!pci_dma_mapping_error(bus_address))) {
+ if (likely(!pci_dma_mapping_error(fp->this_card_priv->
+ pci_dev,
+ bus_address))) {
pci_unmap_addr_set(fp->tx + temp_tx,
address, bus_address);
writel(bus_address,
@@ -1244,8 +1244,8 @@ static irqreturn_t fepci_stream_interrup
"failed to map transmission DMA\n");
}
}
- temp_tx = (temp_tx + 1) & (TX_RING_SIZE - 1);
- temp_tx_unit = (temp_tx_unit + 1);
+ temp_tx = (temp_tx + 1u) & (TX_RING_SIZE - 1u);
+ temp_tx_unit = (temp_tx_unit + 1u);
temp_tx_unit *= temp_tx_unit < fp->units;
}
@@ -1291,9 +1291,9 @@ static int __devinit fepci_init_one(stru
goto FOUND;
}
}
- if (unlikely(find_cnt == 256))
+ if (unlikely(find_cnt == 256u))
return -ENOMEM;
- cards = kmalloc((find_cnt + 1) * sizeof(struct fepci_card_private *),
+ cards = kmalloc((find_cnt + 1u) * sizeof(struct fepci_card_private *),
GFP_KERNEL);
if (cards == NULL)
return -ENOMEM;
@@ -1318,7 +1318,7 @@ static int __devinit fepci_init_one(stru
kfree(old);
find_cnt++;
FOUND:
- if (PCI_FUNC(pdev->devfn) != 0)
+ if (PCI_FUNC(pdev->devfn) != 0u)
return -ENXIO;
i = pci_enable_device(pdev);
if (unlikely(i)) {
@@ -1326,7 +1326,7 @@ FOUND:
return i;
}
pci_set_master(pdev);
- i = pci_request_regions(pdev, (char *)fepci_name);
+ i = pci_request_regions(pdev, fepci_name);
if (unlikely(i)) {
dev_warn(&pdev->dev, "requesting regions error %d\n", i);
pci_disable_device(pdev);
@@ -1337,17 +1337,17 @@ FOUND:
dev_warn(&pdev->dev, "no suitable DMA available\n");
goto ERR_1;
}
- if (unlikely(pci_resource_len(pdev, 0) < FEPCI_SIZE)) {
+ if (unlikely(pci_resource_len(pdev, 0u) < FEPCI_SIZE)) {
dev_warn(&pdev->dev, "resource length less than required %u\n",
FEPCI_SIZE);
i = -ENXIO;
goto ERR_1;
}
- if (unlikely(!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM))) {
+ if (unlikely(!(pci_resource_flags(pdev, 0u) & IORESOURCE_MEM))) {
i = -ENXIO;
goto ERR_1;
}
- ioaddr = pci_iomap(pdev, 0, FEPCI_SIZE);
+ ioaddr = pci_iomap(pdev, 0u, FEPCI_SIZE);
if (unlikely(!ioaddr)) {
dev_warn(&pdev->dev, "mapping failed\n");
i = -ENOMEM;
@@ -1386,12 +1386,12 @@ FOUND:
card_private->ch_privates[j] = fp;
name = dev->name;
/* name := xxx01..xxxnn */
- memcpy(name, fepci_netdev_name, 6);
+ memcpy(name, fepci_netdev_name, 6u);
/* dev->name[3]= j+'0'; channel number -> ascii */
/* minor number -> ascii */
- name[4] = ((position * CHANNELS + j) % 10) + '0';
+ name[4] = ((position * CHANNELS + j) % 10u) + '0';
/* minor number -> ascii */
- name[3] = ((position * CHANNELS + j) / 10) + '0';
+ name[3] = ((position * CHANNELS + j) / 10u) + '0';
clear_int(j, IntrAllInts, ioaddr);
ether_setup(dev);
/* HW_ADDR is got using the mailbox: */
@@ -1402,40 +1402,37 @@ FOUND:
waituntil = jiffies + HZ;
while (time_before(jiffies, waituntil) &&
get_semafore(real_mailbox) != RETINA_READY_PC)
- msleep(1);
+ msleep(1u);
if (get_semafore(real_mailbox) == RETINA_READY_PC) {
- u32 __iomem *data = real_mailbox->Data + 3 * j;
+ u32 __iomem *data = real_mailbox->Data + 3u * j;
address[5] = readb_relaxed(data);
- address[4] = readb_relaxed(((u8 __iomem *) data)
- + 1);
+ address[4] = readb_relaxed((u8 __iomem *)data + 1u);
address[3] = readb_relaxed(++data);
- address[2] = readb_relaxed(((u8 __iomem *) data)
- + 1);
+ address[2] = readb_relaxed((u8 __iomem *)data + 1u);
address[1] = readb_relaxed(++data);
- address[0] = readb_relaxed(((u8 __iomem *) data)
- + 1);
+ address[0] = readb_relaxed((u8 __iomem *)data + 1u);
if (unlikely(!is_valid_ether_addr(address)))
goto RANDOM;
} else {
RANDOM: random_ether_addr(address);
}
set_semafore(real_mailbox, RETINA_IDLE);
- dev->addr_len = 6;
+ dev->addr_len = 6u;
dev->base_addr = (unsigned long)ioaddr;
dev->irq = pdev->irq;
fp->rx_desc = (struct fepci_desc __iomem *)
(ioaddr + first_rx_desc + j * to_next_ch_rx_desc);
fp->tx_desc = (struct fepci_desc __iomem *)
(ioaddr + first_tx_desc + j * to_next_ch_tx_desc);
- fp->channel_number = j; /* channel in this device */
+ fp->channel_number = j; /* The channel in this device. */
fp->this_dev = dev;
fp->this_card_priv = card_private;
- fp->cur_tx = 0;
- fp->in_stream_mode = 0;
- fp->in_eth_mode = 0;
+ fp->cur_tx = 0u;
+ fp->in_stream_mode = false;
+ fp->in_eth_mode = false;
fp->reg_rxctrl = reg_first_rxctrl + j * to_next_rxctrl;
fp->reg_txctrl = reg_first_txctrl + j * to_next_txctrl;
- /* The FEPCI specific entries in the device structure */
+ /* The specific entries in the device structure. */
dev->open = &fepci_open;
dev->hard_start_xmit = &fepci_start_xmit;
dev->stop = &fepci_close;
@@ -1464,6 +1461,52 @@ ERR_1:
return i;
}
+/* Initialize the reception and transmission ring buffers. */
+static inline void fepci_init_ring(struct net_device *dev)
+{
+ struct fepci_ch_private *fp = netdev_priv(dev);
+ unsigned d;
+
+ for (d = 0u; d < RX_RING_SIZE; d++) {
+ struct sk_buff *skb = __netdev_alloc_skb(dev,
+ RETINA_DMA_SIZE +
+ NET_IP_ALIGN,
+ GFP_KERNEL);
+ if (unlikely(skb == NULL)) {
+ZERO:
+ writel(0u, &fp->rx_desc[d].desc_a);
+ writel(0u, &fp->rx_desc[d].desc_b);
+ } else {
+ dma_addr_t bus_address;
+ skb_reserve(skb, NET_IP_ALIGN);
+ bus_address =
+ pci_map_single(fp->this_card_priv->pci_dev,
+ skb->data, RETINA_MRU,
+ PCI_DMA_FROMDEVICE);
+ if (likely(!pci_dma_mapping_error(fp->this_card_priv->
+ pci_dev,
+ bus_address))) {
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ fp->rx[d].skbuff = skb;
+ pci_unmap_addr_set(fp->rx + d, address,
+ bus_address);
+ writel(bus_address, &fp->rx_desc[d].desc_a);
+ writel(enable_transfer, &fp->rx_desc[d].desc_b);
+ } else {
+ dev_kfree_skb(skb);
+ goto ZERO;
+ }
+ }
+ }
+
+ for (d = 0u; d < TX_RING_SIZE; d++) {
+ fp->tx[d].skbuff = NULL;
+ writel(0u, &fp->tx_desc[d].desc_a); /* No address. */
+ /* No transfer enable, no interrupt enable. */
+ writel(0u, &fp->tx_desc[d].desc_b);
+ }
+}
+
static int fepci_open_down(struct net_device *dev, struct fepci_ch_private *fp)
{
uint8_t __iomem *ioaddr = (uint8_t __iomem *)dev->base_addr;
@@ -1481,12 +1524,12 @@ static int fepci_open_down(struct net_de
}
}
- fp->in_eth_mode = 1;
+ fp->in_eth_mode = true;
fepci_init_ring(dev);
- fp->cur_rx = 0;
- fp->cur_tx = 0;
+ fp->cur_rx = 0u;
+ fp->cur_tx = 0u;
netif_carrier_off(dev);
@@ -1507,7 +1550,7 @@ static int fepci_open_down(struct net_de
(Tx_fifo_threshold & TX_FIFO_THRESHOLD_PACKET_MODE)),
ioaddr + fp->reg_txctrl);
- netif_wake_queue(dev);
+ netif_start_queue(dev);
init_timer(&fp->timer);
fp->timer.expires = jiffies + HZ;
@@ -1537,13 +1580,13 @@ static void fepci_timer(unsigned long da
struct fepci_ch_private *fp = netdev_priv(dev);
if ((get_common_reg_word(fp->this_card_priv->ioaddr, 0x72) >>
- fp->channel_number) & 1)
+ fp->channel_number) & 1u)
netif_carrier_off(dev);
else
netif_carrier_on(dev);
if (fp->in_eth_mode)
- mod_timer(&fp->timer, jiffies + 5 * HZ);
+ mod_timer(&fp->timer, jiffies + 5ul * HZ);
}
static void fepci_tx_timeout(struct net_device *dev)
@@ -1552,50 +1595,6 @@ static void fepci_tx_timeout(struct net_
tasklet_schedule(&fp->transmission);
}
-/* Initialize the reception and transmission ring buffers. */
-static void fepci_init_ring(struct net_device *dev)
-{
- struct fepci_ch_private *fp = netdev_priv(dev);
- unsigned i;
-
- for (i = 0; i < RX_RING_SIZE; i++) {
- struct sk_buff *skb = __netdev_alloc_skb(dev,
- RETINA_DMA_SIZE +
- NET_IP_ALIGN,
- GFP_KERNEL);
- if (unlikely(skb == NULL)) {
-ZERO:
- writel(0, &fp->rx_desc[i].desc_a);
- writel(0, &fp->rx_desc[i].desc_b);
- } else {
- dma_addr_t bus_address;
- skb_reserve(skb, NET_IP_ALIGN);
- bus_address =
- pci_map_single(fp->this_card_priv->pci_dev,
- skb->data, RETINA_MRU,
- PCI_DMA_FROMDEVICE);
- if (likely(!pci_dma_mapping_error(bus_address))) {
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- fp->rx[i].skbuff = skb;
- pci_unmap_addr_set(fp->rx + i, address,
- bus_address);
- writel(bus_address, &fp->rx_desc[i].desc_a);
- writel(enable_transfer, &fp->rx_desc[i].desc_b);
- } else {
- dev_kfree_skb(skb);
- goto ZERO;
- }
- }
- }
-
- for (i = 0; i < TX_RING_SIZE; i++) {
- fp->tx[i].skbuff = NULL;
- writel(0, &fp->tx_desc[i].desc_a); /* No address. */
- /* No transfer enable, no interrupt enable. */
- writel(0, &fp->tx_desc[i].desc_b);
- }
-}
-
static int fepci_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct fepci_ch_private *fp;
@@ -1615,7 +1614,8 @@ static int fepci_start_xmit(struct sk_bu
bus_address = pci_map_single(fp->this_card_priv->pci_dev, skb->data,
tx_length, PCI_DMA_TODEVICE);
cur_tx = fp->cur_tx;
- if (likely(!pci_dma_mapping_error(bus_address))) {
+ if (likely(!pci_dma_mapping_error(fp->this_card_priv->pci_dev,
+ bus_address))) {
struct fepci_desc __iomem *descriptor;
pci_unmap_addr_set(fp->tx + cur_tx, address, bus_address);
descriptor = &fp->tx_desc[cur_tx];
@@ -1630,7 +1630,7 @@ static int fepci_start_xmit(struct sk_bu
fp->tx[cur_tx].skbuff = skb;
/* Calculate the next transmission descriptor entry. */
- next = (cur_tx + 1) & (TX_RING_SIZE - 1);
+ next = (cur_tx + 1u) & (TX_RING_SIZE - 1u);
fp->cur_tx = next;
/* If the next descriptor is busy, discontinue taking new ones. */
if (fp->tx[next].skbuff != NULL)
@@ -1642,59 +1642,59 @@ static int fepci_start_xmit(struct sk_bu
static void retina_tx(unsigned long channel)
{
- unsigned next;
struct fepci_ch_private *fp = (struct fepci_ch_private *)channel;
struct net_device *dev = fp->this_dev;
struct fepci_desc __iomem *tx_desc = fp->tx_desc;
- unsigned i = 0;
+ unsigned d = 0u;
+ struct netdev_queue *txq;
do {
uint32_t desc_b;
- struct sk_buff *skb = fp->tx[i].skbuff;
+ struct sk_buff *skb = fp->tx[d].skbuff;
struct fepci_desc __iomem *desc;
if (skb == NULL)
continue;
- desc = tx_desc + i;
+ desc = tx_desc + d;
desc_b = readl_relaxed(&desc->desc_b);
- if ((desc_b & transfer_not_done) == 0) {
- /* Has been sent. */
+ if (!(desc_b & transfer_not_done)) { /* Has been sent. */
pci_unmap_single(fp->this_card_priv->pci_dev,
- pci_unmap_addr(fp->tx + i, address),
+ pci_unmap_addr(fp->tx + d, address),
skb->len, PCI_DMA_TODEVICE);
dev_kfree_skb(skb);
- fp->tx[i].skbuff = NULL;
+ fp->tx[d].skbuff = NULL;
if (unlikely(desc_b & fifo_error))
dev->stats.tx_fifo_errors++;
else
dev->stats.tx_packets++;
}
- } while (i++ < TX_RING_SIZE - 1);
- netif_tx_lock(dev);
- next = fp->cur_tx;
- /* If next transmission descriptor is free, continue taking new ones. */
- if (netif_queue_stopped(dev) &&
- fp->tx[next].skbuff == NULL &&
- fp->in_eth_mode)
- netif_wake_queue(dev);
- netif_tx_unlock(dev);
+ } while (d++ < TX_RING_SIZE - 1u);
+ txq = netdev_get_tx_queue(dev, 0u);
+ if (__netif_tx_trylock(txq)) {
+ unsigned next = fp->cur_tx;
+ if (netif_queue_stopped(dev) &&
+ fp->tx[next].skbuff == NULL &&
+ fp->in_eth_mode)
+ netif_wake_queue(dev);
+ __netif_tx_unlock(txq);
+ } else {
+ tasklet_schedule(&fp->transmission);
+ }
}
static inline void fepci_rx(struct fepci_ch_private *fp, struct
net_device *dev)
{
- unsigned i, old_cur_rx = fp->cur_rx;
- unsigned last = (old_cur_rx + RX_RING_SIZE - 1) & (RX_RING_SIZE - 1);
- for (i = old_cur_rx;
- i != last;
- i = (i + 1) & (RX_RING_SIZE - 1)) {
+ unsigned d, old_cur_rx = fp->cur_rx;
+ unsigned last = (old_cur_rx + RX_RING_SIZE - 1u) & (RX_RING_SIZE - 1u);
+ for (d = old_cur_rx; d != last; d = (d + 1u) & (RX_RING_SIZE - 1u)) {
uint32_t desc_b;
- struct sk_buff **rx_skbuff = &fp->rx[i].skbuff;
+ struct sk_buff **rx_skbuff = &fp->rx[d].skbuff;
struct sk_buff *skb = *rx_skbuff;
- struct fepci_desc __iomem *rx_desc = fp->rx_desc + i;
+ struct fepci_desc __iomem *rx_desc = fp->rx_desc + d;
if (unlikely(skb == NULL))
goto RESERVE;
desc_b = readl(&rx_desc->desc_b);
- if (!(desc_b & transfer_not_done)) { /* transfer done */
+ if (!(desc_b & transfer_not_done)) { /* Transfer done. */
uint32_t length;
- fp->cur_rx = (i + 1) & (RX_RING_SIZE - 1);
+ fp->cur_rx = (d + 1u) & (RX_RING_SIZE - 1u);
if (unlikely(desc_b & (fifo_error | size_error |
crc_error | octet_error |
line_error))) {
@@ -1708,13 +1708,13 @@ ENABLE_TRANSFER: writel(enable_transfer
dev->stats.rx_errors++;
continue;
}
- length = (desc_b & frame_length) - 4;
+ length = (desc_b & frame_length) - 4u;
if (unlikely(length > RETINA_MRU)) {
dev->stats.rx_length_errors++;
goto ENABLE_TRANSFER;
}
pci_unmap_single(fp->this_card_priv->pci_dev,
- pci_unmap_addr(fp->rx + i, address),
+ pci_unmap_addr(fp->rx + d, address),
RETINA_MRU, PCI_DMA_FROMDEVICE);
__skb_put(skb, length);
skb->protocol = eth_type_trans(skb, dev);
@@ -1755,8 +1755,10 @@ RESERVE: skb = netdev_alloc_skb(dev, RE
pci_dev, skb->data,
RETINA_MRU,
PCI_DMA_FROMDEVICE);
- if (likely(!pci_dma_mapping_error(address))) {
- pci_unmap_addr_set(fp->rx + i,
+ if (likely(!pci_dma_mapping_error(fp->
+ this_card_priv->pci_dev,
+ address))) {
+ pci_unmap_addr_set(fp->rx + d,
address, address);
*rx_skbuff = skb;
skb->ip_summed = CHECKSUM_UNNECESSARY;
@@ -1798,7 +1800,7 @@ static void fepci_close_down(struct net_
struct fepci_ch_private *fp,
struct fepci_card_private *card)
{
- unsigned i;
+ unsigned d;
uint8_t __iomem *ioaddr;
struct pci_dev *pdev;
if (unlikely(!fp->in_eth_mode))
@@ -1810,8 +1812,8 @@ static void fepci_close_down(struct net_
ioaddr = (uint8_t __iomem *)dev->base_addr;
writel(0x0, ioaddr + fp->reg_rxctrl);
writel(0x0, ioaddr + fp->reg_txctrl);
- fp->in_eth_mode = 0;
- smp_wmb(); /* Get out of Ethernet mode before deleting the timer. */
+ fp->in_eth_mode = false;
+ smp_wmb(); /* Prevent restarting the timer by setting the mode false. */
del_timer_sync(&fp->timer);
free_irq(dev->irq, dev);
@@ -1819,26 +1821,26 @@ static void fepci_close_down(struct net_
tasklet_kill(&fp->transmission);
netif_tx_disable(dev);
pdev = card->pci_dev;
- /* Free all the reception struct sk_buffs... */
- for (i = 0; i < RX_RING_SIZE; i++) {
- struct sk_buff *skb = fp->rx[i].skbuff;
+ /* Free all the reception struct sk_buffs. */
+ for (d = 0u; d < RX_RING_SIZE; d++) {
+ struct sk_buff *skb = fp->rx[d].skbuff;
if (skb != NULL) {
pci_unmap_single(pdev,
- pci_unmap_addr(fp->rx + i, address),
+ pci_unmap_addr(fp->rx + d, address),
RETINA_MRU, PCI_DMA_FROMDEVICE);
dev_kfree_skb(skb);
- fp->rx[i].skbuff = NULL;
+ fp->rx[d].skbuff = NULL;
}
}
- /* ...and transmission ones. */
- for (i = 0; i < TX_RING_SIZE; i++) {
- struct sk_buff *skb = fp->tx[i].skbuff;
+ /* Free all the transmission sk_buffs. */
+ for (d = 0u; d < TX_RING_SIZE; d++) {
+ struct sk_buff *skb = fp->tx[d].skbuff;
if (skb != NULL) {
pci_unmap_single(pdev,
- pci_unmap_addr(fp->tx + i, address),
+ pci_unmap_addr(fp->tx + d, address),
skb->len, PCI_DMA_TODEVICE);
dev_kfree_skb(skb);
- fp->tx[i].skbuff = NULL;
+ fp->tx[d].skbuff = NULL;
}
}
}
@@ -1857,8 +1859,8 @@ static void alarm_off(uint8_t __iomem *i
{
uint8_t __iomem *ioaddr_reg_custom = ioaddr + reg_custom;
do {
- /* Alarm manager interrupt off. */
- writel(0, ioaddr_reg_custom);
+ /* Turn the alarm manager interrupt off. */
+ writel(0u, ioaddr_reg_custom);
synchronize_irq(irq);
} while (readl_relaxed(ioaddr_reg_custom) & AM_interrupt_mask);
}
@@ -1866,21 +1868,21 @@ static void alarm_off(uint8_t __iomem *i
static void fepci_remove_one(struct pci_dev *pdev)
{
struct fepci_card_private *cardp = pci_get_drvdata(pdev);
- unsigned int i;
+ unsigned int c;
uint8_t __iomem *ioaddr = cardp->ioaddr;
unsigned int irq = pdev->irq;
cardp->removed = true;
alarm_off(ioaddr, irq);
- for (i = 0; i < CHANNELS; i++) {
- struct fepci_ch_private *fp = cardp->ch_privates[i];
+ for (c = 0u; c < CHANNELS; c++) {
+ struct fepci_ch_private *fp = cardp->ch_privates[c];
struct net_device *dev = fp->this_dev;
if (unlikely(dev == NULL))
continue;
unregister_netdev(dev);
fepci_stream_close(cardp, fp);
free_netdev(dev);
- cardp->ch_privates[i] = NULL;
+ cardp->ch_privates[c] = NULL;
}
free_irq(irq, cardp);
@@ -1898,10 +1900,9 @@ static void fepci_remove_one(struct pci_
static int fepci_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct fepci_card_private *cardp = pci_get_drvdata(pdev);
- unsigned channel;
+ unsigned channel = 0u;
unsigned irq = pdev->irq;
cardp->removed = true;
- channel = 0;
do {
struct fepci_ch_private *fp = cardp->ch_privates[channel];
struct net_device *dev = fp->this_dev;
@@ -1923,7 +1924,7 @@ static int fepci_suspend(struct pci_dev
fp->in_eth_mode = in_eth_mode;
fp->in_stream_mode = in_stream_mode;
fp->stream_on = stream_on;
- } while (channel++ < CHANNELS - 1);
+ } while (channel++ < CHANNELS - 1u);
alarm_off(cardp->ioaddr, irq);
/* Disable IRQ */
free_irq(irq, cardp);
@@ -1955,9 +1956,9 @@ static int fepci_resume(struct pci_dev *
IRQF_SHARED, fepci_alarm_manager_name, cardp);
if (unlikely(error))
return error;
- /* Alarm manager interrupt on. */
+ /* Turn alarm manager interrupt on. */
writel(AM_interrupt_mask, cardp->ioaddr + reg_custom);
- channel = 0;
+ channel = 0u;
cardp->removed = false;
do {
struct fepci_ch_private *fp = cardp->ch_privates[channel];
@@ -1972,12 +1973,12 @@ static int fepci_resume(struct pci_dev *
error = open;
} else if (fp->in_stream_mode) {
int open;
- fp->in_stream_mode = 0;
+ fp->in_stream_mode = false;
open = fepci_stream_open(cardp, fp);
if (unlikely(open))
error = open;
if (fp->stream_on) {
- fp->stream_on = 0;
+ fp->stream_on = false;
open = fepci_stream_start(cardp, fp);
if (unlikely(open))
error = open;
@@ -1985,13 +1986,13 @@ static int fepci_resume(struct pci_dev *
}
rtnl_unlock();
netif_device_attach(dev);
- } while (channel++ < CHANNELS - 1);
+ } while (channel++ < CHANNELS - 1u);
return error;
}
#endif
static struct pci_driver fepci_driver = {
- .name = "retina",
+ .name = fepci_name,
.id_table = fepci_pci_tbl,
.probe = fepci_init_one,
.remove = fepci_remove_one,
@@ -2004,7 +2005,7 @@ static struct pci_driver fepci_driver =
static int __init fepci_init(void)
{
stream_pointers = get_zeroed_page(GFP_KERNEL);
- if (unlikely(stream_pointers == 0))
+ if (unlikely(stream_pointers == 0ul))
return -ENOMEM;
major = pci_register_driver(&fepci_driver);
if (unlikely(major))
@@ -2025,7 +2026,7 @@ static void __exit fepci_cleanup(void)
pci_unregister_driver(&fepci_driver);
fepci_unregister_char_device();
free_page(stream_pointers);
- for (card = 0; card < find_cnt; card++)
+ for (card = 0u; card < find_cnt; card++)
kfree(card_privates[card]);
kfree(card_privates);
}
--
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