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authorDimitri Staessens <dimitri.staessens@ugent.be>2017-12-16 13:42:55 +0100
committerDimitri Staessens <dimitri.staessens@ugent.be>2017-12-16 13:42:55 +0100
commit2e4570959ef3abea5ae65a735d37adf7d799f3ba (patch)
tree517f783e8460519550c1853aed56f07f3318f7d3
parent9e419e39cf84f6bc8f0590f319cb6059a73dc660 (diff)
downloadraptor-2e4570959ef3abea5ae65a735d37adf7d799f3ba.zip
raptor-2e4570959ef3abea5ae65a735d37adf7d799f3ba.tar.gz
linux: Refactor raptor device driver
This refactors the raptor kernel module to conform to the Linux kernel style as checked with checkpatch.pl.
-rw-r--r--linux/raptor.c1386
1 files changed, 695 insertions, 691 deletions
diff --git a/linux/raptor.c b/linux/raptor.c
index cb28c44..024096e 100644
--- a/linux/raptor.c
+++ b/linux/raptor.c
@@ -67,874 +67,878 @@ MODULE_LICENSE("GPL");
struct packet;
struct packet {
- uint64_t u_addr;
- uint16_t length;
- struct page* page;
- dma_addr_t dma_addr;
- struct packet* next;
+ uint64_t u_addr;
+ uint16_t length;
+ struct page *page;
+ dma_addr_t dma_addr;
+ struct packet *next;
};
struct queue {
- struct packet* first;
- struct packet* last;
- uint64_t count;
+ struct packet *first;
+ struct packet *last;
+ uint64_t count;
};
-struct raptor {
- dev_t base;
- struct class * class;
+struct {
+ dev_t base;
+ struct class *class;
- dev_t dev;
- struct device * device;
- struct cdev cdev;
+ dev_t dev;
+ struct device *device;
+ struct cdev cdev;
- uint64_t *bar;
- struct pci_dev *pdev;
+ uint64_t *bar;
+ struct pci_dev *pdev;
- bool interrupt;
+ bool interrupt;
- struct queue send_queue;
- struct queue recv_queue;
- struct queue send_done_queue;
- struct queue recv_done_queue;
- struct queue send_free_queue;
- struct queue recv_free_queue;
+ struct queue send_queue;
+ struct queue recv_queue;
+ struct queue send_done_queue;
+ struct queue recv_done_queue;
+ struct queue send_free_queue;
+ struct queue recv_free_queue;
- struct packet* send_packets;
- struct packet* recv_packets;
+ struct packet *send_packets;
+ struct packet *recv_packets;
- uint64_t recv_need;
+ uint64_t recv_need;
- spinlock_t lock;
- wait_queue_head_t wait;
+ spinlock_t lock;
+ wait_queue_head_t wait;
- struct task_struct* kthread;
+ struct task_struct *kthread;
- uint64_t int_count;
- uint64_t send_busy;
- uint64_t recv_busy;
-};
-
-struct raptor raptor;
-
-// -------------------------------------------
+ uint64_t int_count;
+ uint64_t send_busy;
+ uint64_t recv_busy;
+} raptor;
-static void queue_push(struct queue* queue, struct packet* packet)
+static void queue_push(struct queue *queue, struct packet *packet)
{
- spin_lock_irq(&raptor.lock);
-
- if (queue->count == 0) {
- queue->first = packet;
- queue->last = packet;
- }
- else {
- queue->last->next = packet;
- queue->last = packet;
- }
- queue->count++;
-
- spin_unlock_irq(&raptor.lock);
- wake_up(&raptor.wait);
+ spin_lock_irq(&raptor.lock);
+
+ if (queue->count == 0) {
+ queue->first = packet;
+ queue->last = packet;
+ } else {
+ queue->last->next = packet;
+ queue->last = packet;
+ }
+ queue->count++;
+
+ spin_unlock_irq(&raptor.lock);
+ wake_up(&raptor.wait);
}
-static struct packet* queue_pop(struct queue* queue, bool block)
+static struct packet *queue_pop(struct queue *queue, bool block)
{
- struct packet* packet;
-
- spin_lock_irq(&raptor.lock);
-
- if (block) {
- if (wait_event_interruptible_lock_irq_timeout(
- raptor.wait, queue->count > 0, raptor.lock, HZ) <= 0) {
-
- spin_unlock_irq(&raptor.lock);
- return NULL;
- }
- }
- else {
- if (queue->count == 0) {
- spin_unlock_irq(&raptor.lock);
- return NULL;
- }
- }
-
- packet = queue->first;
- queue->first = packet->next;
- queue->count--;
-
- spin_unlock_irq(&raptor.lock);
- wake_up(&raptor.wait);
- return packet;
+ struct packet *packet;
+
+ spin_lock_irq(&raptor.lock);
+
+ if (block) {
+ if (wait_event_interruptible_lock_irq_timeout
+ (raptor.wait, queue->count > 0, raptor.lock, HZ) <= 0) {
+
+ spin_unlock_irq(&raptor.lock);
+ return NULL;
+ }
+ } else {
+ if (queue->count == 0) {
+ spin_unlock_irq(&raptor.lock);
+ return NULL;
+ }
+ }
+
+ packet = queue->first;
+ queue->first = packet->next;
+ queue->count--;
+
+ spin_unlock_irq(&raptor.lock);
+ wake_up(&raptor.wait);
+ return packet;
}
-// -------------------------------------------
-
uint64_t raptor_read(uint64_t offset)
{
- return raptor.bar[offset];
+ return raptor.bar[offset];
}
void raptor_write(uint64_t offset, uint64_t data)
{
- raptor.bar[offset] = data;
+ raptor.bar[offset] = data;
}
uint64_t endian64(uint64_t data)
{
- uint64_t byte0 = (data & 0x00000000000000FF) << 7*8;
- uint64_t byte1 = (data & 0x000000000000FF00) << 5*8;
- uint64_t byte2 = (data & 0x0000000000FF0000) << 3*8;
- uint64_t byte3 = (data & 0x00000000FF000000) << 1*8;
- uint64_t byte4 = (data & 0x000000FF00000000) >> 1*8;
- uint64_t byte5 = (data & 0x0000FF0000000000) >> 3*8;
- uint64_t byte6 = (data & 0x00FF000000000000) >> 5*8;
- uint64_t byte7 = (data & 0xFF00000000000000) >> 7*8;
-
- return byte0 | byte1 | byte2 | byte3 | byte4 | byte5 | byte6 | byte7;
+ uint64_t byte0 = (data & 0x00000000000000FF) << 7 * 8;
+ uint64_t byte1 = (data & 0x000000000000FF00) << 5 * 8;
+ uint64_t byte2 = (data & 0x0000000000FF0000) << 3 * 8;
+ uint64_t byte3 = (data & 0x00000000FF000000) << 1 * 8;
+ uint64_t byte4 = (data & 0x000000FF00000000) >> 1 * 8;
+ uint64_t byte5 = (data & 0x0000FF0000000000) >> 3 * 8;
+ uint64_t byte6 = (data & 0x00FF000000000000) >> 5 * 8;
+ uint64_t byte7 = (data & 0xFF00000000000000) >> 7 * 8;
+
+ return byte0 | byte1 | byte2 | byte3 | byte4 | byte5 | byte6 | byte7;
}
static irqreturn_t raptor_interrupt(int irq, void *dev_id)
{
- spin_lock(&raptor.lock);
- raptor.interrupt = true;
- spin_unlock(&raptor.lock);
- wake_up(&raptor.wait);
+ spin_lock(&raptor.lock);
+ raptor.interrupt = true;
+ spin_unlock(&raptor.lock);
+ wake_up(&raptor.wait);
- return IRQ_HANDLED;
+ return IRQ_HANDLED;
}
-void mdio_raw(unsigned operation, unsigned phy_addr, unsigned dev_addr, unsigned data)
+void mdio_raw(unsigned int operation, unsigned int phy_addr,
+ unsigned int dev_addr, unsigned int data)
{
- unsigned command = (operation << 26) | (phy_addr << 21) | (dev_addr << 16) | (data & 0xFFFF);
+ unsigned int command =
+ (operation << 26) | (phy_addr << 21) | (dev_addr << 16) | (data &
+ 0xFFFF);
- raptor_write(CMD_MDIO, endian64((uint64_t)command));
- msleep(1);
+ raptor_write(CMD_MDIO, endian64((uint64_t) command));
+ msleep(20);
}
-void mdio_write(unsigned phy_addr, unsigned dev_addr, unsigned data_addr, unsigned data)
+void mdio_write(unsigned int phy_addr, unsigned int dev_addr,
+ unsigned int data_addr, unsigned int data)
{
- mdio_raw(0, phy_addr, dev_addr, data_addr);
- mdio_raw(1, phy_addr, dev_addr, data);
+ mdio_raw(0, phy_addr, dev_addr, data_addr);
+ mdio_raw(1, phy_addr, dev_addr, data);
}
-unsigned mdio_read(unsigned phy_addr, unsigned dev_addr, unsigned data_addr)
+unsigned int mdio_read(unsigned int phy_addr, unsigned int dev_addr,
+ unsigned int data_addr)
{
- mdio_raw(0, phy_addr, dev_addr, data_addr);
- mdio_raw(3, phy_addr, dev_addr, 0);
+ mdio_raw(0, phy_addr, dev_addr, data_addr);
+ mdio_raw(3, phy_addr, dev_addr, 0);
- return (unsigned)endian64(raptor_read(BAR_MDIO));
+ return (unsigned int) endian64(raptor_read(BAR_MDIO));
}
-int mdio_i2c_read(uint32_t phy_addr, uint16_t dev_addr, uint16_t word_addr, uint16_t * data)
+int mdio_i2c_read(uint32_t phy_addr, uint16_t dev_addr, uint16_t word_addr,
+ uint16_t *data)
{
- uint16_t stat;
- int i;
+ uint16_t stat;
+ int i;
- mdio_write(phy_addr, 1, AEL_I2C_CTRL, (dev_addr << 8) | (1 << 8) | word_addr);
+ mdio_write(phy_addr, 1, AEL_I2C_CTRL,
+ (dev_addr << 8) | (1 << 8) | word_addr);
- for (i = 0; i < 20; i++) {
- msleep(2);
- stat = mdio_read(phy_addr, 1, AEL_I2C_STAT);
+ for (i = 0; i < 20; i++) {
+ msleep(20);
+ stat = mdio_read(phy_addr, 1, AEL_I2C_STAT);
- if ((stat & 3) == 1){
- stat = mdio_read(phy_addr, 1, AEL_I2C_DATA);
+ if ((stat & 3) == 1) {
+ stat = mdio_read(phy_addr, 1, AEL_I2C_DATA);
- *data = stat >> 8;
- return 0;
- }
- }
- return -1;
+ *data = stat >> 8;
+ return 0;
+ }
+ }
+ return -1;
}
void mdio_initialize(uint32_t phy_addr, int mode)
{
- int size, i;
-
- // Step 1
- size = sizeof(reset) / sizeof(uint16_t);
-
- for(i = 0; i < size; i += 2) {
- mdio_write(phy_addr, PMA_MDIO_DEVICE_ADDRESS, reset[i], reset[i+1]);
- }
-
- msleep(5);
-
- // Step 2
- if (mode == MODE_SR) {
- size = sizeof(sr_edc) / sizeof(uint16_t);
-
- for(i = 0; i < size; i += 2) {
- mdio_write(phy_addr, PMA_MDIO_DEVICE_ADDRESS, sr_edc[i], sr_edc[i+1]);
- }
- }
- else if (mode == MODE_TWINAX) {
- size = sizeof(twinax_edc) / sizeof(uint16_t);
-
- for(i = 0; i < size; i += 2) {
- mdio_write(phy_addr, PMA_MDIO_DEVICE_ADDRESS, twinax_edc[i], twinax_edc[i+1]);
- }
- }
-
- // Step 3
- size = sizeof(regs1) / sizeof(uint16_t);
- for(i = 0; i < size; i+=2) {
- mdio_write(phy_addr, PMA_MDIO_DEVICE_ADDRESS, regs1[i], regs1[i+1]);
- }
-
- msleep(5);
+ int size, i;
+
+ /* Step 1 */
+ size = sizeof(reset) / sizeof(uint16_t);
+
+ for (i = 0; i < size; i += 2) {
+ mdio_write(phy_addr, PMA_MDIO_DEVICE_ADDRESS, reset[i],
+ reset[i + 1]);
+ }
+
+ msleep(20);
+
+ /* Step 2 */
+ if (mode == MODE_SR) {
+ size = sizeof(sr_edc) / sizeof(uint16_t);
+
+ for (i = 0; i < size; i += 2) {
+ mdio_write(phy_addr, PMA_MDIO_DEVICE_ADDRESS, sr_edc[i],
+ sr_edc[i + 1]);
+ }
+ } else if (mode == MODE_TWINAX) {
+ size = sizeof(twinax_edc) / sizeof(uint16_t);
+
+ for (i = 0; i < size; i += 2) {
+ mdio_write(phy_addr, PMA_MDIO_DEVICE_ADDRESS,
+ twinax_edc[i], twinax_edc[i + 1]);
+ }
+ }
+ /* Step 3 */
+ size = sizeof(regs1) / sizeof(uint16_t);
+ for (i = 0; i < size; i += 2) {
+ mdio_write(phy_addr, PMA_MDIO_DEVICE_ADDRESS, regs1[i],
+ regs1[i + 1]);
+ }
+
+ msleep(20);
}
int phy_configuration(void)
{
- int port, dev;
- uint16_t value = 0;
- char port_mode;
-
- // check if we need initialization
- value = mdio_read(2, PMA_MDIO_DEVICE_ADDRESS, AEL_MICRO_CONTROLLER_CTL_ADDRESS);
-
- //printk(KERN_INFO "raptor: 0xc04a: %04x\n",value);
- if (value & 0x8000) { // uC held in reset
- printk(KERN_INFO "raptor: Programming the AEL2005 PHY chips...\n");
-
- for (port = 0; port < 4; port++) {
- if (port == 0) dev = 2;
- else if (port == 1) dev = 1;
- else if (port == 2) dev = 0;
- else dev = 3;
-
- value = 0;
-
- // check if we have a 10GBASE-SR cable
- mdio_i2c_read(dev, MODULE_DEV_ADDR, 0x3, &value);
-
- if((value >> 4) == 1) {
- port_mode = MODE_SR;
- }
- else {
- port_mode = MODE_TWINAX;
- }
-
- printk(KERN_INFO "raptor: Programming PHY %d...\n", port);
-
- mdio_initialize(dev, port_mode);
- }
-
- return 0;
- }
-
- return -1;
+ int port, dev;
+ uint16_t value = 0;
+ char port_mode;
+
+ /* check if we need initialization */
+ value =
+ mdio_read(2, PMA_MDIO_DEVICE_ADDRESS,
+ AEL_MICRO_CONTROLLER_CTL_ADDRESS);
+
+ if (value & 0x8000) { /* uC held in reset */
+ for (port = 0; port < 4; port++) {
+ if (port == 0)
+ dev = 2;
+ else if (port == 1)
+ dev = 1;
+ else if (port == 2)
+ dev = 0;
+ else
+ dev = 3;
+
+ value = 0;
+
+ /* check if we have a 10GBASE-SR cable */
+ mdio_i2c_read(dev, MODULE_DEV_ADDR, 0x3, &value);
+
+ if ((value >> 4) == 1)
+ port_mode = MODE_SR;
+ else
+ port_mode = MODE_TWINAX;
+
+ mdio_initialize(dev, port_mode);
+ }
+
+ return 0;
+ }
+
+ return -1;
}
static void read_debug(void)
{
- uint64_t status;
- uint64_t address;
- uint64_t data;
- uint64_t cmd;
- uint64_t buff;
- uint64_t length;
- uint64_t cmpl_count;
- uint64_t cmpl_data;
- uint64_t cmpl_tag;
- uint64_t cmpl_state;
- uint64_t write_count;
- uint64_t write_length;
- uint64_t write_addr;
- uint64_t write_data;
- uint64_t accept_count;
- uint64_t done_count;
-
- status = endian64(raptor_read(0));
- address = endian64(raptor_read(1));
- data = endian64(raptor_read(2));
- cmd = endian64(raptor_read(3));
- buff = endian64(raptor_read(4));
- length = endian64(raptor_read(5));
- cmpl_count = endian64(raptor_read(10));
- cmpl_data = endian64(raptor_read(11));
- cmpl_tag = endian64(raptor_read(12));
- cmpl_state = endian64(raptor_read(13));
-
- write_count = endian64(raptor_read(20));
- write_length = endian64(raptor_read(21));
- write_addr = endian64(raptor_read(22));
- write_data = endian64(raptor_read(23));
- accept_count = endian64(raptor_read(24));
- done_count = endian64(raptor_read(25));
-
- printk(KERN_INFO "raptor: read_debug:\n");
- printk(KERN_INFO "raptor: status = 0x%llx.\n", status);
- printk(KERN_INFO "raptor: address = 0x%llx.\n", address);
- printk(KERN_INFO "raptor: data = 0x%llx.\n", data);
- printk(KERN_INFO "raptor: cmd = 0x%llx.\n", cmd);
- printk(KERN_INFO "raptor: buff = 0x%llx.\n", buff);
- printk(KERN_INFO "raptor: length = %llu.\n", length);
- printk(KERN_INFO "raptor: cmpl_count = %llu.\n", cmpl_count);
- printk(KERN_INFO "raptor: cmpl_data = 0x%llx.\n", cmpl_data);
- printk(KERN_INFO "raptor: cmpl_tag = 0x%llx.\n", cmpl_tag);
- printk(KERN_INFO "raptor: cmpl_state = 0x%llx.\n", cmpl_state);
- printk(KERN_INFO "raptor: write_count = %llu.\n", write_count);
- printk(KERN_INFO "raptor: write_length = %llu.\n", write_length);
- printk(KERN_INFO "raptor: write_addr = 0x%llx.\n", write_addr);
- printk(KERN_INFO "raptor: write_data = 0x%llx.\n", write_data);
- printk(KERN_INFO "raptor: accept_count = %llu.\n", accept_count);
- printk(KERN_INFO "raptor: done_count = %llu.\n", done_count);
+ uint64_t status;
+ uint64_t address;
+ uint64_t data;
+ uint64_t cmd;
+ uint64_t buff;
+ uint64_t length;
+ uint64_t cmpl_count;
+ uint64_t cmpl_data;
+ uint64_t cmpl_tag;
+ uint64_t cmpl_state;
+ uint64_t write_count;
+ uint64_t write_length;
+ uint64_t write_addr;
+ uint64_t write_data;
+ uint64_t accept_count;
+ uint64_t done_count;
+
+ status = endian64(raptor_read(0));
+ address = endian64(raptor_read(1));
+ data = endian64(raptor_read(2));
+ cmd = endian64(raptor_read(3));
+ buff = endian64(raptor_read(4));
+ length = endian64(raptor_read(5));
+ cmpl_count = endian64(raptor_read(10));
+ cmpl_data = endian64(raptor_read(11));
+ cmpl_tag = endian64(raptor_read(12));
+ cmpl_state = endian64(raptor_read(13));
+
+ write_count = endian64(raptor_read(20));
+ write_length = endian64(raptor_read(21));
+ write_addr = endian64(raptor_read(22));
+ write_data = endian64(raptor_read(23));
+ accept_count = endian64(raptor_read(24));
+ done_count = endian64(raptor_read(25));
+
+ dev_info(raptor.device, "%s:\n", __func__);
+ dev_info(raptor.device, " status = 0x%llx.\n", status);
+ dev_info(raptor.device, " address = 0x%llx.\n", address);
+ dev_info(raptor.device, " data = 0x%llx.\n", data);
+ dev_info(raptor.device, " cmd = 0x%llx.\n", cmd);
+ dev_info(raptor.device, " buff = 0x%llx.\n", buff);
+ dev_info(raptor.device, " length = %llu.\n", length);
+ dev_info(raptor.device, " cmpl_count = %llu.\n", cmpl_count);
+ dev_info(raptor.device, " cmpl_data = 0x%llx.\n", cmpl_data);
+ dev_info(raptor.device, " cmpl_tag = 0x%llx.\n", cmpl_tag);
+ dev_info(raptor.device, " cmpl_state = 0x%llx.\n", cmpl_state);
+ dev_info(raptor.device, " write_count = %llu.\n", write_count);
+ dev_info(raptor.device, " write_length = %llu.\n", write_length);
+ dev_info(raptor.device, " write_addr = 0x%llx.\n", write_addr);
+ dev_info(raptor.device, " write_data = 0x%llx.\n", write_data);
+ dev_info(raptor.device, " accept_count = %llu.\n", accept_count);
+ dev_info(raptor.device, " done_count = %llu.\n", done_count);
}
#define get_send(status, i) ((status >> (i * 4 + 0)) & 0x3)
#define get_recv(status, i) ((status >> (i * 4 + 2)) & 0x3)
-struct packet* send_packets[BUFF_COUNT];
-struct packet* recv_packets[BUFF_COUNT];
+struct packet *send_packets[BUFF_COUNT];
+struct packet *recv_packets[BUFF_COUNT];
uint8_t send_buff[BUFF_COUNT];
uint8_t recv_buff[BUFF_COUNT];
-static int raptor_kthread(void* data)
+static int raptor_kthread(void *data)
{
- bool interrupt;
- uint64_t status = 0;
- uint8_t send_new;
- uint8_t recv_new;
- uint8_t send_old;
- uint8_t recv_old;
- uint64_t i;
- bool send_full = false;
- bool recv_full = false;
- struct packet* packet;
- struct device* dev = &raptor.pdev->dev;
- uint64_t offset;
- uint64_t rest;
-
- printk(KERN_INFO "raptor_kthread: started\n");
-
- memset(send_packets, 0, sizeof(send_packets));
- memset(recv_packets, 0, sizeof(recv_packets));
-
- raptor.interrupt = true;
-
- while (true) {
- spin_lock_irq(&raptor.lock);
-
- if (wait_event_interruptible_lock_irq(
- raptor.wait,
- kthread_should_stop() ||
- raptor.interrupt ||
- (! send_full && raptor.send_queue.count > 0) ||
- (! recv_full && raptor.recv_queue.count > 0),
- raptor.lock) != 0) {
-
- printk(KERN_ERR "raptor_kthread: wait_event failed\n");
- spin_unlock_irq(&raptor.lock);
- break;
- }
-
- interrupt = raptor.interrupt;
- raptor.interrupt = false;
- spin_unlock_irq(&raptor.lock);
-
- if (kthread_should_stop())
- break;
-
- if (interrupt) {
- // read status
- // update done_queues
- // incr recv_need
- status = endian64(raptor_read(0));
-
- raptor.int_count++;
-
- for (i = 0; i < BUFF_COUNT; i++) {
- send_new = get_send(status, i);
- recv_new = get_recv(status, i);
- send_old = send_buff[i];
- recv_old = recv_buff[i];
-
- if (send_new != BUFF_EMPTY)
- raptor.send_busy++;
- if (recv_new != BUFF_EMPTY)
- raptor.recv_busy++;
-
- if ((send_old == BUFF_ADDR || send_old == BUFF_DATA) &&
- (send_new == BUFF_FULL || send_new == BUFF_EMPTY) &&
- send_packets[i] != NULL) {
-
- packet = send_packets[i];
- offset = packet->u_addr & (~PAGE_MASK);
- rest = PAGE_SIZE - offset;
-
- dma_unmap_page(dev, packet->dma_addr, rest, DMA_TO_DEVICE);
- queue_push(&raptor.send_done_queue, packet);
- send_packets[i] = NULL;
- }
- if ((recv_old == BUFF_ADDR || recv_old == BUFF_DATA) &&
- (recv_new == BUFF_FULL || recv_new == BUFF_EMPTY) &&
- recv_packets[i] != NULL) {
-
- packet = recv_packets[i];
- offset = packet->u_addr & (~PAGE_MASK);
- rest = PAGE_SIZE - offset;
-
- dma_unmap_page(dev, packet->dma_addr, rest, DMA_FROM_DEVICE);
- queue_push(&raptor.recv_done_queue, packet);
- recv_packets[i] = NULL;
- }
- if (recv_old != BUFF_FULL && recv_new == BUFF_FULL) {
- spin_lock_irq(&raptor.lock);
- raptor.recv_need++;
- spin_unlock_irq(&raptor.lock);
- wake_up(&raptor.wait);
- }
-
- send_buff[i] = send_new;
- recv_buff[i] = recv_new;
- }
- }
-
- // handle send_queue
- send_full = true;
-
- for (i = 0; i < BUFF_COUNT; i++) {
- if (send_buff[i] == BUFF_EMPTY && send_packets[i] == NULL) {
-
- packet = queue_pop(&raptor.send_queue, false);
-
- if (packet == NULL) {
- send_full = false;
- break;
- }
-
- // map page to dma_addr
- // write that to hardware
-
- offset = packet->u_addr & (~PAGE_MASK);
- rest = PAGE_SIZE - offset;
-
- packet->dma_addr = dma_map_page(dev, packet->page, offset, rest, DMA_TO_DEVICE);
-
- raptor_write(CMD_SEND | (i << 2) | (packet->length << 7), endian64(packet->dma_addr));
-
- send_buff[i] = BUFF_ADDR;
- send_packets[i] = packet;
- }
- }
-
- // handle recv_queue
- recv_full = true;
-
- for (i = 0; i < BUFF_COUNT; i++) {
- if (recv_buff[i] == BUFF_FULL && recv_packets[i] == NULL) {
-
- packet = queue_pop(&raptor.recv_queue, false);
-
- if (packet == NULL) {
- recv_full = false;
- break;
- }
-
- // map page to dma_addr
- // write that to hardware
-
- offset = packet->u_addr & (~PAGE_MASK);
- rest = PAGE_SIZE - offset;
-
- packet->dma_addr = dma_map_page(dev, packet->page, offset, rest, DMA_FROM_DEVICE);
-
- raptor_write(CMD_RECV | (i << 2), endian64(packet->dma_addr));
-
- recv_buff[i] = BUFF_ADDR;
- recv_packets[i] = packet;
- }
- }
- }
-
- printk(KERN_INFO "raptor_kthread: stopped\n");
- return 0;
+ bool interrupt;
+ uint64_t status = 0;
+ uint8_t send_new;
+ uint8_t recv_new;
+ uint8_t send_old;
+ uint8_t recv_old;
+ uint64_t i;
+ bool send_full = false;
+ bool recv_full = false;
+ struct packet *packet;
+ struct device *dev = &raptor.pdev->dev;
+ uint64_t offset;
+ uint64_t rest;
+
+ memset(send_packets, 0, sizeof(send_packets));
+ memset(recv_packets, 0, sizeof(recv_packets));
+
+ raptor.interrupt = true;
+
+ while (true) {
+ spin_lock_irq(&raptor.lock);
+
+ if (wait_event_interruptible_lock_irq(
+ raptor.wait,
+ kthread_should_stop() || raptor.interrupt ||
+ (!send_full && raptor. send_queue.count > 0) ||
+ (!recv_full && raptor.recv_queue.count > 0),
+ raptor.lock) != 0) {
+ dev_err(raptor.device, "wait_event failed\n");
+ spin_unlock_irq(&raptor.lock);
+ break;
+ }
+
+ interrupt = raptor.interrupt;
+ raptor.interrupt = false;
+ spin_unlock_irq(&raptor.lock);
+
+ if (kthread_should_stop())
+ break;
+
+ if (interrupt) {
+ /*
+ *read status
+ * update done_queues
+ * incr recv_need
+ */
+ status = endian64(raptor_read(0));
+
+ raptor.int_count++;
+
+ for (i = 0; i < BUFF_COUNT; i++) {
+ send_new = get_send(status, i);
+ recv_new = get_recv(status, i);
+ send_old = send_buff[i];
+ recv_old = recv_buff[i];
+
+ if (send_new != BUFF_EMPTY)
+ raptor.send_busy++;
+ if (recv_new != BUFF_EMPTY)
+ raptor.recv_busy++;
+
+ if ((send_old == BUFF_ADDR
+ || send_old == BUFF_DATA)
+ && (send_new == BUFF_FULL
+ || send_new == BUFF_EMPTY)
+ && send_packets[i] != NULL) {
+
+ packet = send_packets[i];
+ offset = packet->u_addr & (~PAGE_MASK);
+ rest = PAGE_SIZE - offset;
+
+ dma_unmap_page(dev, packet->dma_addr,
+ rest, DMA_TO_DEVICE);
+ queue_push(&raptor.send_done_queue,
+ packet);
+ send_packets[i] = NULL;
+ }
+ if ((recv_old == BUFF_ADDR
+ || recv_old == BUFF_DATA)
+ && (recv_new == BUFF_FULL
+ || recv_new == BUFF_EMPTY)
+ && recv_packets[i] != NULL) {
+
+ packet = recv_packets[i];
+ offset = packet->u_addr & (~PAGE_MASK);
+ rest = PAGE_SIZE - offset;
+
+ dma_unmap_page(dev, packet->dma_addr,
+ rest, DMA_FROM_DEVICE);
+ queue_push(&raptor.recv_done_queue,
+ packet);
+ recv_packets[i] = NULL;
+ }
+ if (recv_old != BUFF_FULL
+ && recv_new == BUFF_FULL) {
+ spin_lock_irq(&raptor.lock);
+ raptor.recv_need++;
+ spin_unlock_irq(&raptor.lock);
+ wake_up(&raptor.wait);
+ }
+
+ send_buff[i] = send_new;
+ recv_buff[i] = recv_new;
+ }
+ }
+ /* handle send_queue */
+ send_full = true;
+
+ for (i = 0; i < BUFF_COUNT; i++) {
+ if (send_buff[i] == BUFF_EMPTY
+ && send_packets[i] == NULL) {
+
+ packet = queue_pop(&raptor.send_queue, false);
+
+ if (packet == NULL) {
+ send_full = false;
+ break;
+ }
+ /*
+ * map page to dma_addr
+ * write that to hardware
+ */
+
+ offset = packet->u_addr & (~PAGE_MASK);
+ rest = PAGE_SIZE - offset;
+
+ packet->dma_addr =
+ dma_map_page(dev, packet->page, offset,
+ rest, DMA_TO_DEVICE);
+
+ raptor_write(CMD_SEND | (i << 2) |
+ (packet->length << 7),
+ endian64(packet->dma_addr));
+
+ send_buff[i] = BUFF_ADDR;
+ send_packets[i] = packet;
+ }
+ }
+
+ /* handle recv_queue */
+ recv_full = true;
+
+ for (i = 0; i < BUFF_COUNT; i++) {
+ if (recv_buff[i] == BUFF_FULL
+ && recv_packets[i] == NULL) {
+
+ packet = queue_pop(&raptor.recv_queue, false);
+
+ if (packet == NULL) {
+ recv_full = false;
+ break;
+ }
+ /*
+ * map page to dma_addr
+ * write that to hardware
+ */
+
+ offset = packet->u_addr & (~PAGE_MASK);
+ rest = PAGE_SIZE - offset;
+
+ packet->dma_addr =
+ dma_map_page(dev, packet->page, offset,
+ rest, DMA_FROM_DEVICE);
+
+ raptor_write(CMD_RECV | (i << 2),
+ endian64(packet->dma_addr));
+
+ recv_buff[i] = BUFF_ADDR;
+ recv_packets[i] = packet;
+ }
+ }
+ }
+
+ return 0;
}
static int pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
- if (pci_enable_device(pdev) != 0)
- goto error_no_cleanup;
-
- if (pci_request_region(pdev, RAPTOR_BAR, "raptor") != 0)
- goto error_disable_device;
+ if (pci_enable_device(pdev) != 0)
+ goto error_no_cleanup;
- if ((raptor.bar = pci_ioremap_bar(pdev, RAPTOR_BAR)) == NULL)
- goto error_release_region;
+ if (pci_request_region(pdev, RAPTOR_BAR, "raptor") != 0)
+ goto error_disable_device;
- if (pci_enable_msi(pdev) < 0)
- goto error_iounmap;
+ raptor.bar = pci_ioremap_bar(pdev, RAPTOR_BAR);
+ if (raptor.bar == NULL)
+ goto error_release_region;
- if (request_irq(pdev->irq, raptor_interrupt, 0, "raptor", NULL) < 0)
- goto error_disable_msi;
+ if (pci_enable_msi(pdev) < 0)
+ goto error_iounmap;
- if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)) < 0)
- goto error_free_irq;
+ if (request_irq(pdev->irq, raptor_interrupt, 0, "raptor", NULL) < 0)
+ goto error_disable_msi;
- if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)) < 0)
- goto error_free_irq;
+ if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)) < 0)
+ goto error_free_irq;
- pci_set_master(pdev);
- raptor.pdev = pdev;
+ if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)) < 0)
+ goto error_free_irq;
- phy_configuration();
+ pci_set_master(pdev);
+ raptor.pdev = pdev;
- read_debug();
+ phy_configuration();
- raptor.kthread = kthread_run(raptor_kthread, NULL, "raptor_kthread");
+ read_debug();
- if (IS_ERR(raptor.kthread))
- goto error_clear_master;
+ raptor.kthread = kthread_run(raptor_kthread, NULL, "raptor_kthread");
- printk(KERN_INFO "raptor: pci_probe succes\n");
+ if (IS_ERR(raptor.kthread))
+ goto error_clear_master;
- return 0;
+ return 0;
-error_clear_master:
- pci_clear_master(pdev);
-error_free_irq:
- free_irq(pdev->irq, NULL);
-error_disable_msi:
- pci_disable_msi(pdev);
-error_iounmap:
- iounmap(raptor.bar);
-error_release_region:
- pci_release_region(pdev, 0);
-error_disable_device:
- pci_disable_device(pdev);
-error_no_cleanup:
- raptor.bar = NULL;
- raptor.pdev = NULL;
- printk(KERN_ALERT "raptor: pci_probe FAILED\n");
- return -1;
+ error_clear_master:
+ pci_clear_master(pdev);
+ error_free_irq:
+ free_irq(pdev->irq, NULL);
+ error_disable_msi:
+ pci_disable_msi(pdev);
+ error_iounmap:
+ iounmap(raptor.bar);
+ error_release_region:
+ pci_release_region(pdev, 0);
+ error_disable_device:
+ pci_disable_device(pdev);
+ error_no_cleanup:
+ raptor.bar = NULL;
+ raptor.pdev = NULL;
+ dev_alert(raptor.device, "%s FAILED\n", __func__);
+ return -1;
}
static void pci_remove(struct pci_dev *pdev)
{
- printk(KERN_INFO "raptor: pci_remove started...\n");
-
- (void)kthread_stop(raptor.kthread);
-
- pci_clear_master(pdev);
- free_irq(pdev->irq, NULL);
- pci_disable_msi(pdev);
- iounmap(raptor.bar);
- pci_release_region(pdev, 0);
- pci_disable_device(pdev);
- raptor.bar = NULL;
- raptor.pdev = NULL;
-
- printk(KERN_INFO "raptor: pci_remove done\n");
+ (void) kthread_stop(raptor.kthread);
+
+ pci_clear_master(pdev);
+ free_irq(pdev->irq, NULL);
+ pci_disable_msi(pdev);
+ iounmap(raptor.bar);
+ pci_release_region(pdev, 0);
+ pci_disable_device(pdev);
+ raptor.bar = NULL;
+ raptor.pdev = NULL;
}
-static pci_ers_result_t pci_error_detected(struct pci_dev *pdev, enum pci_channel_state state)
+static pci_ers_result_t pci_error_detected(struct pci_dev *pdev,
+ enum pci_channel_state state)
{
- printk(KERN_ALERT "raptor: pcie error %d\n", state);
- return PCI_ERS_RESULT_RECOVERED;
+ return PCI_ERS_RESULT_RECOVERED;
}
-static int raptor_send(uint64_t count, uint64_t* u_addrs)
+static int raptor_send(uint64_t count, uint64_t *u_addrs)
{
- uint64_t i;
- uint64_t u_addr;
- uint16_t bytes;
- uint16_t length;
- struct page* page;
- struct packet* packet;
-
- for (i = 0; i < count; i++) {
- if (copy_from_user(&u_addr, &u_addrs[i], sizeof(u_addr)) != 0) {
- printk(KERN_ERR "raptor_send: copy_from_user u_addr failed\n");
- return i;
- }
-
- if (copy_from_user(&bytes, (void*)u_addr, sizeof(bytes)) != 0) {
- printk(KERN_ERR "raptor_send: copy_from_user bytes failed\n");
- return i;
- }
-
- if (get_user_pages_fast(u_addr, 1, false, &page) != 1) {
- printk(KERN_ERR "raptor_send: get_user_pages_fast failed\n");
- return i;
- }
-
- packet = queue_pop(&raptor.send_free_queue, true);
-
- if (packet == NULL) {
- printk(KERN_ERR "raptor_send: queue_pop send_free_queue failed\n");
- put_page(page);
- return i;
- }
-
- length = (bytes >> 3);
-
- if (bytes & 0x7)
- length += 1;
-
- packet->u_addr = u_addr;
- packet->length = length;
- packet->page = page;
-
- queue_push(&raptor.send_queue, packet);
- }
- return count;
+ uint64_t i;
+ uint64_t u_addr;
+ uint16_t bytes;
+ uint16_t length;
+ struct page *page;
+ struct packet *packet;
+
+ for (i = 0; i < count; i++) {
+ if (copy_from_user(&u_addr, &u_addrs[i], sizeof(u_addr)) != 0) {
+ dev_err(raptor.device, "copy_from_user u_addr failed\n");
+ return i;
+ }
+
+ if (copy_from_user(&bytes, (void *) u_addr, sizeof(bytes))
+ != 0) {
+ dev_err(raptor.device, "copy_from_user bytes failed\n");
+ return i;
+ }
+
+ if (get_user_pages_fast(u_addr, 1, false, &page) != 1) {
+ dev_err(raptor.device, "get_user_pages_fast failed\n");
+ return i;
+ }
+
+ packet = queue_pop(&raptor.send_free_queue, true);
+
+ if (packet == NULL) {
+ dev_err(raptor.device, "queue_pop send_free_queue failed\n");
+ put_page(page);
+ return i;
+ }
+
+ length = (bytes >> 3);
+
+ if (bytes & 0x7)
+ length += 1;
+
+ packet->u_addr = u_addr;
+ packet->length = length;
+ packet->page = page;
+
+ queue_push(&raptor.send_queue, packet);
+ }
+ return count;
}
-static int raptor_recv(uint64_t count, uint64_t* u_addrs)
+static int raptor_recv(uint64_t count, uint64_t *u_addrs)
{
- uint64_t i;
- uint64_t u_addr;
- struct page* page;
- struct packet* packet;
-
- for (i = 0; i < count; i++) {
- if (copy_from_user(&u_addr, &u_addrs[i], sizeof(u_addr)) != 0) {
- printk(KERN_ERR "raptor_recv: copy_from_user u_addr failed\n");
- return i;
- }
-
- if (get_user_pages_fast(u_addr, 1, true, &page) != 1) {
- printk(KERN_ERR "raptor_recv: get_user_pages_fast failed\n");
- return i;
- }
-
- packet = queue_pop(&raptor.recv_free_queue, true);
-
- if (packet == NULL) {
- printk(KERN_ERR "raptor_recv: queue_pop recv_free_queue failed\n");
- put_page(page);
- return i;
- }
-
- packet->u_addr = u_addr;
- packet->page = page;
-
- queue_push(&raptor.recv_queue, packet);
- }
- return count;
+ uint64_t i;
+ uint64_t u_addr;
+ struct page *page;
+ struct packet *packet;
+
+ for (i = 0; i < count; i++) {
+ if (copy_from_user(&u_addr, &u_addrs[i], sizeof(u_addr)) != 0) {
+ dev_err(raptor.device, "recv copy_from_user u_addr failed\n");
+ return i;
+ }
+
+ if (get_user_pages_fast(u_addr, 1, true, &page) != 1) {
+ dev_err(raptor.device, "recv get_user_pages_fast failed\n");
+ return i;
+ }
+
+ packet = queue_pop(&raptor.recv_free_queue, true);
+
+ if (packet == NULL) {
+ dev_err(raptor.device, "recv: queue_pop recv_free_queue failed\n");
+ put_page(page);
+ return i;
+ }
+
+ packet->u_addr = u_addr;
+ packet->page = page;
+
+ queue_push(&raptor.recv_queue, packet);
+ }
+ return count;
}
-static int raptor_send_done(uint64_t count, uint64_t* u_addrs)
+static int raptor_send_done(uint64_t count, uint64_t *u_addrs)
{
- uint64_t i;
- struct packet* packet;
+ uint64_t i;
+ struct packet *packet;
- for (i = 0; i < count; i++) {
- packet = queue_pop(&raptor.send_done_queue, i == 0);
+ for (i = 0; i < count; i++) {
+ packet = queue_pop(&raptor.send_done_queue, i == 0);
- if (packet == NULL)
- return i;
+ if (packet == NULL)
+ return i;
- put_page(packet->page);
+ put_page(packet->page);
- if (copy_to_user(&u_addrs[i], &packet->u_addr, sizeof(packet->u_addr)) != 0) {
- printk(KERN_ERR "raptor_send_done: copy_to_user u_addr failed\n");
- return i;
- }
+ if (copy_to_user
+ (&u_addrs[i], &packet->u_addr,
+ sizeof(packet->u_addr)) != 0) {
+ dev_err(raptor.device, "done copy_to_user u_addr failed\n");
+ return i;
+ }
- queue_push(&raptor.send_free_queue, packet);
- }
- return count;
+ queue_push(&raptor.send_free_queue, packet);
+ }
+ return count;
}
-static int raptor_recv_done(uint64_t count, uint64_t* u_addrs)
+static int raptor_recv_done(uint64_t count, uint64_t *u_addrs)
{
- uint64_t i;
- struct packet* packet;
+ uint64_t i;
+ struct packet *packet;
- for (i = 0; i < count; i++) {
- packet = queue_pop(&raptor.recv_done_queue, i == 0);
+ for (i = 0; i < count; i++) {
+ packet = queue_pop(&raptor.recv_done_queue, i == 0);
- if (packet == NULL)
- return i;
+ if (packet == NULL)
+ return i;
- put_page(packet->page);
+ put_page(packet->page);
- if (copy_to_user(&u_addrs[i], &packet->u_addr, sizeof(packet->u_addr)) != 0) {
- printk(KERN_ERR "raptor_recv_done: copy_to_user u_addr failed\n");
- return i;
- }
+ if (copy_to_user
+ (&u_addrs[i], &packet->u_addr,
+ sizeof(packet->u_addr)) != 0) {
+ dev_err(raptor.device,
+ "recv_done: copy_to_user u_addr failed\n");
+ return i;
+ }
- queue_push(&raptor.recv_free_queue, packet);
- }
- return count;
+ queue_push(&raptor.recv_free_queue, packet);
+ }
+ return count;
}
static int raptor_recv_need(uint64_t count)
{
- uint64_t ret;
+ uint64_t ret;
- spin_lock_irq(&raptor.lock);
+ spin_lock_irq(&raptor.lock);
- if (wait_event_interruptible_lock_irq_timeout(
- raptor.wait, raptor.recv_need > 0, raptor.lock, HZ) <= 0) {
+ if (wait_event_interruptible_lock_irq_timeout
+ (raptor.wait, raptor.recv_need > 0, raptor.lock, HZ) <= 0) {
- spin_unlock_irq(&raptor.lock);
- return -1;
- }
+ spin_unlock_irq(&raptor.lock);
+ return -1;
+ }
- if (raptor.recv_need > count) {
- ret = count;
- raptor.recv_need -= count;
- }
- else {
- ret = raptor.recv_need;
- raptor.recv_need = 0;
- }
+ if (raptor.recv_need > count) {
+ ret = count;
+ raptor.recv_need -= count;
+ } else {
+ ret = raptor.recv_need;
+ raptor.recv_need = 0;
+ }
- spin_unlock_irq(&raptor.lock);
- return ret;
+ spin_unlock_irq(&raptor.lock);
+ return ret;
}
-static int raptor_debug(uint64_t* u_array)
+static int raptor_debug(uint64_t *u_array)
{
- if (copy_to_user(&u_array[0], &raptor.int_count, sizeof(uint64_t)) ||
- copy_to_user(&u_array[1], &raptor.send_busy, sizeof(uint64_t)) ||
- copy_to_user(&u_array[2], &raptor.recv_busy, sizeof(uint64_t))) {
+ if (copy_to_user(&u_array[0], &raptor.int_count, sizeof(uint64_t)) ||
+ copy_to_user(&u_array[1], &raptor.send_busy, sizeof(uint64_t)) ||
+ copy_to_user(&u_array[2], &raptor.recv_busy, sizeof(uint64_t))) {
- printk(KERN_ERR "raptor_debug: copy_to_user failed\n");
- return -1;
- }
+ dev_err(raptor.device, "%s: copy_to_user failed\n", __func__);
+ return -1;
+ }
- raptor.int_count = 0;
- raptor.send_busy = 0;
- raptor.recv_busy = 0;
+ raptor.int_count = 0;
+ raptor.send_busy = 0;
+ raptor.recv_busy = 0;
- return 0;
+ return 0;
}
-
-static long raptor_ioctl(struct file * file, unsigned int cmd, unsigned long arg)
+static long raptor_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
- uint64_t type = cmd & 0xFFFF0000;
- uint64_t count = cmd & 0x0000FFFF;
-
- if (raptor.bar == NULL) {
- printk(KERN_ERR "raptor: no pcie device\n");
- return -1;
- }
-
- switch (type) {
- case IOCTL_SEND:
- return raptor_send(count, (uint64_t*)arg);
- case IOCTL_RECV:
- return raptor_recv(count, (uint64_t*)arg);
- case IOCTL_SEND_DONE:
- return raptor_send_done(count, (uint64_t*)arg);
- case IOCTL_RECV_DONE:
- return raptor_recv_done(count, (uint64_t*)arg);
- case IOCTL_RECV_NEED:
- return raptor_recv_need(count);
- case IOCTL_DEBUG:
- return raptor_debug((uint64_t*)arg);
- default:
- printk(KERN_ERR "raptor: unknown ioctl\n");
- return -1;
- }
+ uint64_t type = cmd & 0xFFFF0000;
+ uint64_t count = cmd & 0x0000FFFF;
+
+ if (raptor.bar == NULL) {
+ dev_err(raptor.device, "no pcie device\n");
+ return -1;
+ }
+
+ switch (type) {
+ case IOCTL_SEND:
+ return raptor_send(count, (uint64_t *) arg);
+ case IOCTL_RECV:
+ return raptor_recv(count, (uint64_t *) arg);
+ case IOCTL_SEND_DONE:
+ return raptor_send_done(count, (uint64_t *) arg);
+ case IOCTL_RECV_DONE:
+ return raptor_recv_done(count, (uint64_t *) arg);
+ case IOCTL_RECV_NEED:
+ return raptor_recv_need(count);
+ case IOCTL_DEBUG:
+ return raptor_debug((uint64_t *) arg);
+ default:
+ dev_err(raptor.device, "unknown ioctl\n");
+ return -1;
+ }
}
static struct pci_device_id pci_id_table[] = {
- {PCI_DEVICE(RAPTOR_VENDOR_ID, RAPTOR_DEVICE_ID)},
- {0}
+ {
+ PCI_DEVICE(RAPTOR_VENDOR_ID, RAPTOR_DEVICE_ID)}, {
+ 0}
};
+
MODULE_DEVICE_TABLE(pci, pci_id_table);
static struct pci_error_handlers pci_err_handlers = {
- .error_detected = pci_error_detected
+ .error_detected = pci_error_detected
};
static struct pci_driver pci_driver = {
- .name = "raptor",
- .id_table = pci_id_table,
- .probe = pci_probe,
- .remove = pci_remove,
- .err_handler = &pci_err_handlers
+ .name = "raptor",
+ .id_table = pci_id_table,
+ .probe = pci_probe,
+ .remove = pci_remove,
+ .err_handler = &pci_err_handlers
};
-static struct file_operations raptor_fops = {
- .unlocked_ioctl = raptor_ioctl,
+static const struct file_operations raptor_fops = {
+ .unlocked_ioctl = raptor_ioctl,
};
int init_module(void)
{
- int i;
-
- printk(KERN_INFO "raptor: inserting module...\n");
-
- memset(&raptor, 0, sizeof(raptor));
+ int i;
- spin_lock_init(&raptor.lock);
- init_waitqueue_head(&raptor.wait);
+ memset(&raptor, 0, sizeof(raptor));
- raptor.send_packets = kmalloc(PACKET_COUNT * sizeof(struct packet), GFP_KERNEL);
- raptor.recv_packets = kmalloc(PACKET_COUNT * sizeof(struct packet), GFP_KERNEL);
+ spin_lock_init(&raptor.lock);
+ init_waitqueue_head(&raptor.wait);
- if (raptor.send_packets == NULL || raptor.recv_packets == NULL) {
- printk(KERN_ERR "raptor: failed to allocate packets\n");
- return -1;
- }
+ raptor.send_packets =
+ kmalloc_array(PACKET_COUNT, sizeof(struct packet), GFP_KERNEL);
+ raptor.recv_packets =
+ kmalloc_array(PACKET_COUNT, sizeof(struct packet), GFP_KERNEL);
- for (i = 0; i < PACKET_COUNT; i++) {
- queue_push(&raptor.send_free_queue, &raptor.send_packets[i]);
- queue_push(&raptor.recv_free_queue, &raptor.recv_packets[i]);
- }
+ if (raptor.send_packets == NULL || raptor.recv_packets == NULL)
+ return -1;
- if (alloc_chrdev_region(&raptor.base, 0, 1, "raptor") < 0) {
- printk(KERN_ERR "raptor: alloc_chrdev_region failed\n");
- return -1;
- }
+ for (i = 0; i < PACKET_COUNT; i++) {
+ queue_push(&raptor.send_free_queue, &raptor.send_packets[i]);
+ queue_push(&raptor.recv_free_queue, &raptor.recv_packets[i]);
+ }
- raptor.class = class_create(THIS_MODULE, "raptor");
+ if (alloc_chrdev_region(&raptor.base, 0, 1, "raptor") < 0)
+ return -1;
- if (IS_ERR(raptor.class)) {
- printk(KERN_ERR "raptor: class_create failed\n");
- return -1;
- }
+ raptor.class = class_create(THIS_MODULE, "raptor");
- raptor.dev = MKDEV(MAJOR(raptor.base), 0);
+ if (IS_ERR(raptor.class))
+ return -1;
- raptor.device = device_create(raptor.class, NULL, raptor.dev, NULL, "raptor");
+ raptor.dev = MKDEV(MAJOR(raptor.base), 0);
- if (IS_ERR(raptor.device)) {
- printk(KERN_ERR "raptor: device_create failed\n");
- return -1;
- }
+ raptor.device =
+ device_create(raptor.class, NULL, raptor.dev, NULL, "raptor");
- cdev_init(&raptor.cdev, &raptor_fops);
+ if (IS_ERR(raptor.device))
+ return -1;
- if (cdev_add(&raptor.cdev, raptor.dev, 1) < 0) {
- printk(KERN_ERR "raptor: cdev_add failed\n");
- return -1;
- }
+ cdev_init(&raptor.cdev, &raptor_fops);
- if (pci_register_driver(&pci_driver) != 0) {
- printk(KERN_ALERT "raptor: pci driver NOT loaded\n");
- return -1;
- }
+ if (cdev_add(&raptor.cdev, raptor.dev, 1) < 0) {
+ dev_err(raptor.device, "cdev_add failed\n");
+ return -1;
+ }
- printk(KERN_INFO "raptor: module inserted\n");
+ if (pci_register_driver(&pci_driver) != 0) {
+ dev_err(raptor.device, "pci driver NOT loaded\n");
+ return -1;
+ }
- return 0;
+ return 0;
}
void cleanup_module(void)
{
- printk(KERN_INFO "raptor: removing module...\n");
-
- pci_unregister_driver(&pci_driver);
-
- cdev_del(&raptor.cdev);
- device_destroy(raptor.class, raptor.dev);
+ pci_unregister_driver(&pci_driver);
- class_destroy(raptor.class);
- unregister_chrdev_region(raptor.base, 1);
+ cdev_del(&raptor.cdev);
+ device_destroy(raptor.class, raptor.dev);
- kfree(raptor.send_packets);
- kfree(raptor.recv_packets);
+ class_destroy(raptor.class);
+ unregister_chrdev_region(raptor.base, 1);
- memset(&raptor, 0, sizeof(raptor));
+ kfree(raptor.send_packets);
+ kfree(raptor.recv_packets);
- printk(KERN_INFO "raptor: module removed\n");
+ memset(&raptor, 0, sizeof(raptor));
}