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Commit 316527f9 authored by Chas Williams's avatar Chas Williams Committed by David S. Miller
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[ATM]: Minor LANAI fixes from mitch@sfgoth.com. 

1. pci_device_id structures shouldn't be __devinitdata.  Greg removed
   all of the instances of this in the 2.6.0-test1 tree, but unforunately
   my recent coversion of lanai.c introduced another one.

2. The lanai PCI id constants have now been merged into the kernel headers
   so we don't need to define our own copies.

3. The ioctl's exported by lanai shouldn't be - they were intended for
   debugging only, never for release.  For now they're just '#if 0'ed out.
   They're somewhat dangerous since they don't check any capabilities so
   any user could DoS the interface.
parent 6c0e2636
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Showing with 39 additions and 101 deletions
drivers/atm/lanai.c
View file @ 316527f9
......@@ -71,12 +71,6 @@
#include <linux/delay.h>
#include <linux/interrupt.h>
#ifndef PCI_VENDOR_ID_EF_ATM_LANAI2
/* These need to eventually go into <linux/pci.h> - they're here for now */
#define PCI_VENDOR_ID_EF_ATM_LANAI2 0x0003
#define PCI_VENDOR_ID_EF_ATM_LANAIHB 0x0005
#endif
/* -------------------- TUNABLE PARAMATERS: */
/*
......@@ -205,12 +199,6 @@
typedef int vci_t;
typedef unsigned long bus_addr_t;
/* A bitfield large enough for NUM_VCI */
#define VCI_BITFIELD_NELEM ((NUM_VCI + BITS_PER_LONG - 1) / BITS_PER_LONG)
typedef struct {
unsigned long ul[VCI_BITFIELD_NELEM];
} vci_bitfield;
/* DMA buffer in host memory for TX, RX, or service list. */
struct lanai_buffer {
u32 *start; /* From get_free_pages */
......@@ -302,8 +290,8 @@ struct lanai_dev {
u8 eeprom[LANAI_EEPROM_SIZE];
u32 serialno, magicno;
struct pci_dev *pci;
vci_bitfield backlog_vccs; /* VCCs that are backlogged */
vci_bitfield transmit_ready; /* VCCs that have transmit space */
DECLARE_BITMAP(backlog_vccs, NUM_VCI); /* VCCs with tx backlog */
DECLARE_BITMAP(transmit_ready, NUM_VCI); /* VCCs with transmit space */
struct timer_list timer;
int naal0;
struct lanai_buffer aal0buf; /* AAL0 RX buffers */
......@@ -320,54 +308,20 @@ struct lanai_dev {
/* TODO - organize above in some rational fashion (see <asm/cache.h>) */
};
/* -------------------- VCI_BITFIELD UTILITIES: */
/*
* These functions assume that BITS_PER_LONG is a power of two, which
* should be safe
*/
#if (BITS_PER_LONG & (BITS_PER_LONG - 1))
#error lanai driver requires type long to have a power of two number of bits
#endif
/*
* In vci_bitfield_{set,clear} we do the operation in three
* parts to ensure that gcc doesn't cast anything down to
* 32 bits (and then sign extend them later) on 64-bit
* platforms like the alpha
* Each device has two bitmaps for each VCC (baclog_vccs and transmit_ready)
* This function iterates one of these, calling a given function for each
* vci with their bit set
*/
static inline void vci_bitfield_set(vci_bitfield *bf, vci_t vci)
{
unsigned long bit = 1;
bit <<= (unsigned long) (vci & (BITS_PER_LONG - 1));
bf->ul[vci / BITS_PER_LONG] |= bit;
}
static inline void vci_bitfield_clear(vci_bitfield *bf, vci_t vci)
{
unsigned long bit = 1;
bit <<= (unsigned long) (vci & (BITS_PER_LONG - 1));
bf->ul[vci / BITS_PER_LONG] &= ~bit;
}
static inline void vci_bitfield_init(vci_bitfield *bf)
{
memset(bf, 0, sizeof(*bf));
}
static void vci_bitfield_iterate(struct lanai_dev *lanai,
const vci_bitfield *bf, void (*func)(struct lanai_dev *,vci_t vci))
/*const*/ unsigned long *lp,
void (*func)(struct lanai_dev *,vci_t vci))
{
vci_t vci;
unsigned long mask;
const unsigned long *lp = &(bf->ul[0]);
for (vci = 0; vci < NUM_VCI; lp++)
if (*lp == 0)
vci += BITS_PER_LONG;
else
for (mask = 1; mask != 0; mask <<= 1, vci++)
if (*lp & mask)
func(lanai, vci);
vci_t vci = find_first_bit(lp, NUM_VCI);
while (vci < NUM_VCI) {
func(lanai, vci);
vci = find_next_bit(lp, NUM_VCI, vci + 1);
}
}
/* -------------------- BUFFER UTILITIES: */
......@@ -446,33 +400,6 @@ static int lanai_buf_size_cardorder(const struct lanai_buffer *buf)
return order;
}
/* -------------------- HANDLE BACKLOG_VCCS BITFIELD: */
static inline void vcc_mark_backlogged(struct lanai_dev *lanai,
const struct lanai_vcc *lvcc)
{
APRINTK(lvcc->vbase != 0, "vcc_mark_backlogged: zero vbase!\n");
vci_bitfield_set(&lanai->backlog_vccs, lvcc->vci);
}
static inline void vcc_unmark_backlogged(struct lanai_dev *lanai,
const struct lanai_vcc *lvcc)
{
APRINTK(lvcc->vbase != 0, "vcc_unmark_backlogged: zero vbase!\n");
vci_bitfield_clear(&lanai->backlog_vccs, lvcc->vci);
}
static inline void vcc_backlog_init(struct lanai_dev *lanai)
{
vci_bitfield_init(&lanai->backlog_vccs);
}
static inline int vcc_is_backlogged(/*const*/ struct lanai_vcc *lvcc)
{
return lvcc->tx.inprogress != NULL ||
!skb_queue_empty(&lvcc->tx.backlog);
}
/* -------------------- PORT I/O UTILITIES: */
/* Registers (and their bit-fields) */
......@@ -558,7 +485,6 @@ static inline bus_addr_t reg_addr(const struct lanai_dev *lanai,
return lanai->base + (bus_addr_t) reg;
}
static inline u32 reg_read(const struct lanai_dev *lanai,
enum lanai_register reg)
{
......@@ -921,7 +847,7 @@ static void lanai_shutdown_tx_vci(struct lanai_dev *lanai,
}
while ((skb = skb_dequeue(&lvcc->tx.backlog)) != NULL)
lanai_free_skb(lvcc->tx.atmvcc, skb);
vcc_unmark_backlogged(lanai, lvcc);
__clear_bit(lvcc->vci, lanai->backlog_vccs);
spin_unlock_irqrestore(&lanai->txlock, flags);
timeout = jiffies + ((lanai_buf_size(&lvcc->tx.buf) * HZ) >> 17);
write = TXWRITEPTR_GET_PTR(cardvcc_read(lvcc, vcc_txwriteptr));
......@@ -1283,6 +1209,13 @@ static inline int vcc_tx_space(const struct lanai_vcc *lvcc, int endptr)
return r;
}
/* test if VCC is currently backlogged */
static inline int vcc_is_backlogged(/*const*/ struct lanai_vcc *lvcc)
{
return lvcc->tx.inprogress != NULL ||
!skb_queue_empty(&lvcc->tx.backlog);
}
/* Bit fields in the segmentation buffer descriptor */
#define DESCRIPTOR_MAGIC (0xD0000000)
#define DESCRIPTOR_AAL5 (0x00008000)
......@@ -1467,7 +1400,7 @@ static void vcc_tx_unqueue_aal5(struct lanai_dev *lanai,
atomic_inc(&lvcc->tx.atmvcc->stats->tx);
}
if (skb_queue_empty(&lvcc->tx.backlog))
vcc_unmark_backlogged(lanai, lvcc);
__clear_bit(lvcc->vci, lanai->backlog_vccs);
end:
lanai_endtx(lanai, lvcc);
}
......@@ -1481,8 +1414,8 @@ static void vcc_tx_aal5(struct lanai_dev *lanai, struct lanai_vcc *lvcc,
goto queue_it;
space = vcc_tx_space(lvcc, TXREADPTR_GET_PTR(cardvcc_read(lvcc,
vcc_txreadptr)));
if (space < 64) {
vcc_mark_backlogged(lanai, lvcc); /* No space */
if (space < 64) { /* No space at all */
__set_bit(lvcc->vci, lanai->backlog_vccs);
goto queue_it;
}
if (space >= 16 + (n = aal5_size(skb->len))) {
......@@ -1506,7 +1439,7 @@ static void vcc_tx_aal5(struct lanai_dev *lanai, struct lanai_vcc *lvcc,
lvcc->tx.inprogress = skb;
lvcc->tx.inprogleft = n - bytes;
lvcc->tx.pptr = skb->data + bytes;
vcc_mark_backlogged(lanai, lvcc);
__set_bit(lvcc->vci, lanai->backlog_vccs);
}
lanai_endtx(lanai, lvcc);
return;
......@@ -1535,7 +1468,7 @@ static void iter_dequeue(struct lanai_dev *lanai, vci_t vci)
struct lanai_vcc *lvcc = lanai->vccs[vci];
int endptr;
if (lvcc == NULL || !vcc_is_backlogged(lvcc)) {
vci_bitfield_clear(&lanai->backlog_vccs, vci);
__clear_bit(vci, lanai->backlog_vccs);
return;
}
endptr = TXREADPTR_GET_PTR(cardvcc_read(lvcc, vcc_txreadptr));
......@@ -1547,7 +1480,7 @@ static inline void vcc_tx_dequeue_all(struct lanai_dev *lanai)
{
unsigned long flags;
spin_lock_irqsave(&lanai->txlock, flags);
vci_bitfield_iterate(lanai, &lanai->backlog_vccs, iter_dequeue);
vci_bitfield_iterate(lanai, lanai->backlog_vccs, iter_dequeue);
spin_unlock_irqrestore(&lanai->txlock, flags);
}
......@@ -1831,7 +1764,7 @@ static int handle_service(struct lanai_dev *lanai, u32 s)
lanai->stats.service_notx++;
return 0;
}
vci_bitfield_set(&lanai->transmit_ready, vci);
__set_bit(vci, lanai->transmit_ready);
lvcc->tx.endptr = SERVICE_GET_END(s);
vcclist_read_unlock();
return 1;
......@@ -1916,9 +1849,9 @@ static void run_service(struct lanai_dev *lanai)
if (ntx != 0) {
spin_lock(&lanai->txlock);
vcclist_read_lock();
vci_bitfield_iterate(lanai, &lanai->transmit_ready,
vci_bitfield_iterate(lanai, lanai->transmit_ready,
iter_transmit);
vci_bitfield_init(&lanai->transmit_ready);
CLEAR_BITMAP(&lanai->transmit_ready, NUM_VCI);
vcclist_read_unlock();
spin_unlock(&lanai->txlock);
}
......@@ -2300,8 +2233,8 @@ static int __init lanai_dev_open(struct atm_dev *atmdev)
/* Basic device fields */
lanai->number = atmdev->number;
lanai->num_vci = NUM_VCI;
vci_bitfield_init(&lanai->backlog_vccs);
vci_bitfield_init(&lanai->transmit_ready);
CLEAR_BITMAP(&lanai->backlog_vccs, NUM_VCI);
CLEAR_BITMAP(&lanai->transmit_ready, NUM_VCI);
lanai->naal0 = 0;
#ifdef USE_POWERDOWN
lanai->nbound = 0;
......@@ -2380,7 +2313,7 @@ static int __init lanai_dev_open(struct atm_dev *atmdev)
reg_write(lanai, TX_FIFO_DEPTH, TxDepth_Reg);
reg_write(lanai, 0, CBR_ICG_Reg); /* CBR defaults to no limit */
if ((result = request_irq(lanai->pci->irq, lanai_int, SA_SHIRQ,
"lanai", lanai)) != 0) {
DEV_LABEL, lanai)) != 0) {
printk(KERN_ERR DEV_LABEL ": can't allocate interrupt\n");
goto error_vcctable;
}
......@@ -2573,6 +2506,7 @@ static int lanai_open(struct atm_vcc *atmvcc, short vpi, int vci)
/* NOTE: these are all DEBUGGING ONLY currently */
static int lanai_ioctl(struct atm_dev *atmdev, unsigned int cmd, void *arg)
{
#if 0
int result = 0;
struct lanai_dev *lanai = (struct lanai_dev *) atmdev->dev_data;
switch(cmd) {
......@@ -2649,9 +2583,13 @@ static int lanai_ioctl(struct atm_dev *atmdev, unsigned int cmd, void *arg)
return 0;
#endif
default:
result = -EINVAL;
result = -ENOIOCTLCMD;
}
return result;
#else /* !0 */
(void) atmdev; (void) cmd; (void) arg; /* no compiler warnings */
return -ENOIOCTLCMD;
#endif /* 0 */
}
static int lanai_send(struct atm_vcc *atmvcc, struct sk_buff *skb)
......@@ -2862,7 +2800,7 @@ static int __devinit lanai_init_one(struct pci_dev *pci,
return result;
}
static struct pci_device_id lanai_pci_tbl[] __devinitdata = {
static struct pci_device_id lanai_pci_tbl[] = {
{
PCI_VENDOR_ID_EF, PCI_VENDOR_ID_EF_ATM_LANAI2,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
......
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