#include <linux/module.h>
#include <linux/fs.h>
#include <linux/pci.h>
+#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/file.h>
#include <linux/cdev.h>
+#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/uaccess.h>
#include <linux/io.h>
+#include <linux/wait.h>
+#include <linux/poll.h>
#include "hpilo.h"
static struct class *ilo_class;
static int fifo_enqueue(struct ilo_hwinfo *hw, char *fifobar, int entry)
{
struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
+ unsigned long flags;
int ret = 0;
- spin_lock(&hw->fifo_lock);
+ spin_lock_irqsave(&hw->fifo_lock, flags);
if (!(fifo_q->fifobar[(fifo_q->tail + 1) & fifo_q->imask]
& ENTRY_MASK_O)) {
fifo_q->fifobar[fifo_q->tail & fifo_q->imask] |=
fifo_q->tail += 1;
ret = 1;
}
- spin_unlock(&hw->fifo_lock);
+ spin_unlock_irqrestore(&hw->fifo_lock, flags);
return ret;
}
static int fifo_dequeue(struct ilo_hwinfo *hw, char *fifobar, int *entry)
{
struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
+ unsigned long flags;
int ret = 0;
u64 c;
- spin_lock(&hw->fifo_lock);
+ spin_lock_irqsave(&hw->fifo_lock, flags);
c = fifo_q->fifobar[fifo_q->head & fifo_q->imask];
if (c & ENTRY_MASK_C) {
if (entry)
fifo_q->head += 1;
ret = 1;
}
- spin_unlock(&hw->fifo_lock);
+ spin_unlock_irqrestore(&hw->fifo_lock, flags);
+
+ return ret;
+}
+
+static int fifo_check_recv(struct ilo_hwinfo *hw, char *fifobar)
+{
+ struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
+ unsigned long flags;
+ int ret = 0;
+ u64 c;
+
+ spin_lock_irqsave(&hw->fifo_lock, flags);
+ c = fifo_q->fifobar[fifo_q->head & fifo_q->imask];
+ if (c & ENTRY_MASK_C)
+ ret = 1;
+ spin_unlock_irqrestore(&hw->fifo_lock, flags);
return ret;
}
return ret;
}
+static int ilo_pkt_recv(struct ilo_hwinfo *hw, struct ccb *ccb)
+{
+ char *fifobar = ccb->ccb_u3.recv_fifobar;
+
+ return fifo_check_recv(hw, fifobar);
+}
+
static inline void doorbell_set(struct ccb *ccb)
{
iowrite8(1, ccb->ccb_u5.db_base);
{
iowrite8(2, ccb->ccb_u5.db_base);
}
+
static inline int ctrl_set(int l2sz, int idxmask, int desclim)
{
int active = 0, go = 1;
active << CTRL_BITPOS_A |
go << CTRL_BITPOS_G;
}
+
static void ctrl_setup(struct ccb *ccb, int nr_desc, int l2desc_sz)
{
/* for simplicity, use the same parameters for send and recv ctrls */
static void ilo_ccb_close(struct pci_dev *pdev, struct ccb_data *data)
{
- struct ccb *driver_ccb;
- struct ccb __iomem *device_ccb;
+ struct ccb *driver_ccb = &data->driver_ccb;
+ struct ccb __iomem *device_ccb = data->mapped_ccb;
int retries;
- driver_ccb = &data->driver_ccb;
- device_ccb = data->mapped_ccb;
-
/* complicated dance to tell the hw we are stopping */
doorbell_clr(driver_ccb);
iowrite32(ioread32(&device_ccb->send_ctrl) & ~(1 << CTRL_BITPOS_G),
/* give iLO some time to process stop request */
for (retries = MAX_WAIT; retries > 0; retries--) {
doorbell_set(driver_ccb);
- udelay(1);
+ udelay(WAIT_TIME);
if (!(ioread32(&device_ccb->send_ctrl) & (1 << CTRL_BITPOS_A))
&&
!(ioread32(&device_ccb->recv_ctrl) & (1 << CTRL_BITPOS_A)))
pci_free_consistent(pdev, data->dma_size, data->dma_va, data->dma_pa);
}
-static int ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
+static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
{
char *dma_va, *dma_pa;
- int pkt_id, pkt_sz, i, error;
struct ccb *driver_ccb, *ilo_ccb;
- struct pci_dev *pdev;
driver_ccb = &data->driver_ccb;
ilo_ccb = &data->ilo_ccb;
- pdev = hw->ilo_dev;
data->dma_size = 2 * fifo_sz(NR_QENTRY) +
2 * desc_mem_sz(NR_QENTRY) +
ILO_START_ALIGN + ILO_CACHE_SZ;
- error = -ENOMEM;
- data->dma_va = pci_alloc_consistent(pdev, data->dma_size,
+ data->dma_va = pci_alloc_consistent(hw->ilo_dev, data->dma_size,
&data->dma_pa);
if (!data->dma_va)
- goto out;
+ return -ENOMEM;
dma_va = (char *)data->dma_va;
dma_pa = (char *)data->dma_pa;
driver_ccb->ccb_u5.db_base = hw->db_vaddr + (slot << L2_DB_SIZE);
ilo_ccb->ccb_u5.db_base = NULL; /* hw ccb's doorbell is not used */
+ return 0;
+}
+
+static void ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
+{
+ int pkt_id, pkt_sz;
+ struct ccb *driver_ccb = &data->driver_ccb;
+
/* copy the ccb with physical addrs to device memory */
data->mapped_ccb = (struct ccb __iomem *)
(hw->ram_vaddr + (slot * ILOHW_CCB_SZ));
- memcpy_toio(data->mapped_ccb, ilo_ccb, sizeof(struct ccb));
+ memcpy_toio(data->mapped_ccb, &data->ilo_ccb, sizeof(struct ccb));
/* put packets on the send and receive queues */
pkt_sz = 0;
for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++)
ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, pkt_sz);
+ /* the ccb is ready to use */
doorbell_clr(driver_ccb);
+}
+
+static int ilo_ccb_verify(struct ilo_hwinfo *hw, struct ccb_data *data)
+{
+ int pkt_id, i;
+ struct ccb *driver_ccb = &data->driver_ccb;
/* make sure iLO is really handling requests */
for (i = MAX_WAIT; i > 0; i--) {
if (ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, NULL, NULL))
break;
- udelay(1);
+ udelay(WAIT_TIME);
}
- if (i) {
- ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0);
- doorbell_set(driver_ccb);
- } else {
- dev_err(&pdev->dev, "Open could not dequeue a packet\n");
- error = -EBUSY;
- goto free;
+ if (i == 0) {
+ dev_err(&hw->ilo_dev->dev, "Open could not dequeue a packet\n");
+ return -EBUSY;
}
+ ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0);
+ doorbell_set(driver_ccb);
return 0;
-free:
- ilo_ccb_close(pdev, data);
-out:
- return error;
}
static inline int is_channel_reset(struct ccb *ccb)
FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset = 1;
}
+static inline int get_device_outbound(struct ilo_hwinfo *hw)
+{
+ return ioread32(&hw->mmio_vaddr[DB_OUT]);
+}
+
+static inline int is_db_reset(int db_out)
+{
+ return db_out & (1 << DB_RESET);
+}
+
static inline int is_device_reset(struct ilo_hwinfo *hw)
{
/* check for global reset condition */
- return ioread32(&hw->mmio_vaddr[DB_OUT]) & (1 << DB_RESET);
+ return is_db_reset(get_device_outbound(hw));
+}
+
+static inline void clear_pending_db(struct ilo_hwinfo *hw, int clr)
+{
+ iowrite32(clr, &hw->mmio_vaddr[DB_OUT]);
}
static inline void clear_device(struct ilo_hwinfo *hw)
{
/* clear the device (reset bits, pending channel entries) */
- iowrite32(-1, &hw->mmio_vaddr[DB_OUT]);
+ clear_pending_db(hw, -1);
+}
+
+static inline void ilo_enable_interrupts(struct ilo_hwinfo *hw)
+{
+ iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) | 1, &hw->mmio_vaddr[DB_IRQ]);
}
-static void ilo_locked_reset(struct ilo_hwinfo *hw)
+static inline void ilo_disable_interrupts(struct ilo_hwinfo *hw)
+{
+ iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) & ~1,
+ &hw->mmio_vaddr[DB_IRQ]);
+}
+
+static void ilo_set_reset(struct ilo_hwinfo *hw)
{
int slot;
continue;
set_channel_reset(&hw->ccb_alloc[slot]->driver_ccb);
}
-
- clear_device(hw);
-}
-
-static void ilo_reset(struct ilo_hwinfo *hw)
-{
- spin_lock(&hw->alloc_lock);
-
- /* reset might have been handled after lock was taken */
- if (is_device_reset(hw))
- ilo_locked_reset(hw);
-
- spin_unlock(&hw->alloc_lock);
}
static ssize_t ilo_read(struct file *fp, char __user *buf,
size_t len, loff_t *off)
{
int err, found, cnt, pkt_id, pkt_len;
- struct ccb_data *data;
- struct ccb *driver_ccb;
- struct ilo_hwinfo *hw;
+ struct ccb_data *data = fp->private_data;
+ struct ccb *driver_ccb = &data->driver_ccb;
+ struct ilo_hwinfo *hw = data->ilo_hw;
void *pkt;
- data = fp->private_data;
- driver_ccb = &data->driver_ccb;
- hw = data->ilo_hw;
-
- if (is_device_reset(hw) || is_channel_reset(driver_ccb)) {
+ if (is_channel_reset(driver_ccb)) {
/*
* If the device has been reset, applications
* need to close and reopen all ccbs.
*/
- ilo_reset(hw);
return -ENODEV;
}
size_t len, loff_t *off)
{
int err, pkt_id, pkt_len;
- struct ccb_data *data;
- struct ccb *driver_ccb;
- struct ilo_hwinfo *hw;
+ struct ccb_data *data = fp->private_data;
+ struct ccb *driver_ccb = &data->driver_ccb;
+ struct ilo_hwinfo *hw = data->ilo_hw;
void *pkt;
- data = fp->private_data;
- driver_ccb = &data->driver_ccb;
- hw = data->ilo_hw;
-
- if (is_device_reset(hw) || is_channel_reset(driver_ccb)) {
- /*
- * If the device has been reset, applications
- * need to close and reopen all ccbs.
- */
- ilo_reset(hw);
+ if (is_channel_reset(driver_ccb))
return -ENODEV;
- }
/* get a packet to send the user command */
if (!ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, &pkt_len, &pkt))
return err ? -EFAULT : len;
}
+static unsigned int ilo_poll(struct file *fp, poll_table *wait)
+{
+ struct ccb_data *data = fp->private_data;
+ struct ccb *driver_ccb = &data->driver_ccb;
+
+ poll_wait(fp, &data->ccb_waitq, wait);
+
+ if (is_channel_reset(driver_ccb))
+ return POLLERR;
+ else if (ilo_pkt_recv(data->ilo_hw, driver_ccb))
+ return POLLIN | POLLRDNORM;
+
+ return 0;
+}
+
static int ilo_close(struct inode *ip, struct file *fp)
{
int slot;
struct ccb_data *data;
struct ilo_hwinfo *hw;
+ unsigned long flags;
slot = iminor(ip) % MAX_CCB;
hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);
- spin_lock(&hw->alloc_lock);
-
- if (is_device_reset(hw))
- ilo_locked_reset(hw);
+ spin_lock(&hw->open_lock);
if (hw->ccb_alloc[slot]->ccb_cnt == 1) {
data = fp->private_data;
+ spin_lock_irqsave(&hw->alloc_lock, flags);
+ hw->ccb_alloc[slot] = NULL;
+ spin_unlock_irqrestore(&hw->alloc_lock, flags);
+
ilo_ccb_close(hw->ilo_dev, data);
kfree(data);
- hw->ccb_alloc[slot] = NULL;
} else
hw->ccb_alloc[slot]->ccb_cnt--;
- spin_unlock(&hw->alloc_lock);
+ spin_unlock(&hw->open_lock);
return 0;
}
int slot, error;
struct ccb_data *data;
struct ilo_hwinfo *hw;
+ unsigned long flags;
slot = iminor(ip) % MAX_CCB;
hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);
if (!data)
return -ENOMEM;
- spin_lock(&hw->alloc_lock);
-
- if (is_device_reset(hw))
- ilo_locked_reset(hw);
+ spin_lock(&hw->open_lock);
/* each fd private_data holds sw/hw view of ccb */
if (hw->ccb_alloc[slot] == NULL) {
/* create a channel control block for this minor */
- error = ilo_ccb_open(hw, data, slot);
- if (!error) {
- hw->ccb_alloc[slot] = data;
- hw->ccb_alloc[slot]->ccb_cnt = 1;
- hw->ccb_alloc[slot]->ccb_excl = fp->f_flags & O_EXCL;
- hw->ccb_alloc[slot]->ilo_hw = hw;
- } else
+ error = ilo_ccb_setup(hw, data, slot);
+ if (error) {
kfree(data);
+ goto out;
+ }
+
+ data->ccb_cnt = 1;
+ data->ccb_excl = fp->f_flags & O_EXCL;
+ data->ilo_hw = hw;
+ init_waitqueue_head(&data->ccb_waitq);
+
+ /* write the ccb to hw */
+ spin_lock_irqsave(&hw->alloc_lock, flags);
+ ilo_ccb_open(hw, data, slot);
+ hw->ccb_alloc[slot] = data;
+ spin_unlock_irqrestore(&hw->alloc_lock, flags);
+
+ /* make sure the channel is functional */
+ error = ilo_ccb_verify(hw, data);
+ if (error) {
+
+ spin_lock_irqsave(&hw->alloc_lock, flags);
+ hw->ccb_alloc[slot] = NULL;
+ spin_unlock_irqrestore(&hw->alloc_lock, flags);
+
+ ilo_ccb_close(hw->ilo_dev, data);
+
+ kfree(data);
+ goto out;
+ }
+
} else {
kfree(data);
if (fp->f_flags & O_EXCL || hw->ccb_alloc[slot]->ccb_excl) {
error = 0;
}
}
- spin_unlock(&hw->alloc_lock);
+out:
+ spin_unlock(&hw->open_lock);
if (!error)
fp->private_data = hw->ccb_alloc[slot];
.owner = THIS_MODULE,
.read = ilo_read,
.write = ilo_write,
+ .poll = ilo_poll,
.open = ilo_open,
.release = ilo_close,
};
+static irqreturn_t ilo_isr(int irq, void *data)
+{
+ struct ilo_hwinfo *hw = data;
+ int pending, i;
+
+ spin_lock(&hw->alloc_lock);
+
+ /* check for ccbs which have data */
+ pending = get_device_outbound(hw);
+ if (!pending) {
+ spin_unlock(&hw->alloc_lock);
+ return IRQ_NONE;
+ }
+
+ if (is_db_reset(pending)) {
+ /* wake up all ccbs if the device was reset */
+ pending = -1;
+ ilo_set_reset(hw);
+ }
+
+ for (i = 0; i < MAX_CCB; i++) {
+ if (!hw->ccb_alloc[i])
+ continue;
+ if (pending & (1 << i))
+ wake_up_interruptible(&hw->ccb_alloc[i]->ccb_waitq);
+ }
+
+ /* clear the device of the channels that have been handled */
+ clear_pending_db(hw, pending);
+
+ spin_unlock(&hw->alloc_lock);
+
+ return IRQ_HANDLED;
+}
+
static void ilo_unmap_device(struct pci_dev *pdev, struct ilo_hwinfo *hw)
{
pci_iounmap(pdev, hw->db_vaddr);
device_destroy(ilo_class, MKDEV(ilo_major, i));
cdev_del(&ilo_hw->cdev);
+ ilo_disable_interrupts(ilo_hw);
+ free_irq(pdev->irq, ilo_hw);
ilo_unmap_device(pdev, ilo_hw);
pci_release_regions(pdev);
pci_disable_device(pdev);
ilo_hw->ilo_dev = pdev;
spin_lock_init(&ilo_hw->alloc_lock);
spin_lock_init(&ilo_hw->fifo_lock);
+ spin_lock_init(&ilo_hw->open_lock);
error = pci_enable_device(pdev);
if (error)
pci_set_drvdata(pdev, ilo_hw);
clear_device(ilo_hw);
+ error = request_irq(pdev->irq, ilo_isr, IRQF_SHARED, "hpilo", ilo_hw);
+ if (error)
+ goto unmap;
+
+ ilo_enable_interrupts(ilo_hw);
+
cdev_init(&ilo_hw->cdev, &ilo_fops);
ilo_hw->cdev.owner = THIS_MODULE;
start = devnum * MAX_CCB;
error = cdev_add(&ilo_hw->cdev, MKDEV(ilo_major, start), MAX_CCB);
if (error) {
dev_err(&pdev->dev, "Could not add cdev\n");
- goto unmap;
+ goto remove_isr;
}
for (minor = 0 ; minor < MAX_CCB; minor++) {
}
return 0;
+remove_isr:
+ ilo_disable_interrupts(ilo_hw);
+ free_irq(pdev->irq, ilo_hw);
unmap:
ilo_unmap_device(pdev, ilo_hw);
free_regions:
class_destroy(ilo_class);
}
-MODULE_VERSION("1.0");
+MODULE_VERSION("1.2");
MODULE_ALIAS(ILO_NAME);
MODULE_DESCRIPTION(ILO_NAME);
MODULE_AUTHOR("David Altobelli <david.altobelli@hp.com>");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff