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cnic: Add cnic_uio_dev struct 

and put all uio related structures and ring buffers in it.  This allows
uio operations to be done independent of the cnic device structures.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2010-10-13 14:06:49 +00:00 committed by David S. Miller
parent c06c046225
commit cd801536c2
2 changed files with 124 additions and 100 deletions
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187
drivers/net/cnic.c
View File

@ -89,22 +89,24 @@ static int cnic_cm_set_pg(struct cnic_sock *);
static int cnic_uio_open(struct uio_info *uinfo, struct inode *inode)
{
struct cnic_dev *dev = uinfo->priv;
struct cnic_local *cp = dev->cnic_priv;
struct cnic_uio_dev *udev = uinfo->priv;
struct cnic_dev *dev;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (cp->uio_dev != -1)
if (udev->uio_dev != -1)
return -EBUSY;
rtnl_lock();
dev = udev->dev;
if (!test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
rtnl_unlock();
return -ENODEV;
}
cp->uio_dev = iminor(inode);
udev->uio_dev = iminor(inode);
cnic_init_rings(dev);
rtnl_unlock();
@ -114,12 +116,12 @@ static int cnic_uio_open(struct uio_info *uinfo, struct inode *inode)
static int cnic_uio_close(struct uio_info *uinfo, struct inode *inode)
{
struct cnic_dev *dev = uinfo->priv;
struct cnic_local *cp = dev->cnic_priv;
struct cnic_uio_dev *udev = uinfo->priv;
struct cnic_dev *dev = udev->dev;
cnic_shutdown_rings(dev);
cp->uio_dev = -1;
udev->uio_dev = -1;
return 0;
}
@ -276,8 +278,9 @@ static int cnic_send_nlmsg(struct cnic_local *cp, u32 type,
u16 len = 0;
u32 msg_type = ISCSI_KEVENT_IF_DOWN;
struct cnic_ulp_ops *ulp_ops;
struct cnic_uio_dev *udev = cp->udev;
if (cp->uio_dev == -1)
if (!udev || udev->uio_dev == -1)
return -ENODEV;
if (csk) {
@ -408,7 +411,6 @@ static void cnic_uio_stop(void)
list_for_each_entry(dev, &cnic_dev_list, list) {
struct cnic_local *cp = dev->cnic_priv;
if (cp->cnic_uinfo)
cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
}
read_unlock(&cnic_dev_lock);
@ -770,48 +772,44 @@ static void cnic_free_context(struct cnic_dev *dev)
}
}
static void __cnic_free_uio(struct cnic_dev *dev)
static void __cnic_free_uio(struct cnic_uio_dev *udev)
{
struct cnic_local *cp = dev->cnic_priv;
uio_unregister_device(&udev->cnic_uinfo);
if (cp->cnic_uinfo)
uio_unregister_device(cp->cnic_uinfo);
kfree(cp->cnic_uinfo);
cp->cnic_uinfo = NULL;
if (cp->l2_buf) {
dma_free_coherent(&dev->pcidev->dev, cp->l2_buf_size,
cp->l2_buf, cp->l2_buf_map);
cp->l2_buf = NULL;
if (udev->l2_buf) {
dma_free_coherent(&udev->pdev->dev, udev->l2_buf_size,
udev->l2_buf, udev->l2_buf_map);
udev->l2_buf = NULL;
}
if (cp->l2_ring) {
dma_free_coherent(&dev->pcidev->dev, cp->l2_ring_size,
cp->l2_ring, cp->l2_ring_map);
cp->l2_ring = NULL;
if (udev->l2_ring) {
dma_free_coherent(&udev->pdev->dev, udev->l2_ring_size,
udev->l2_ring, udev->l2_ring_map);
udev->l2_ring = NULL;
}
}
static void cnic_free_uio(struct cnic_dev *dev)
static void cnic_free_uio(struct cnic_uio_dev *udev)
{
if (!dev)
if (!udev)
return;
__cnic_free_uio(dev);
__cnic_free_uio(udev);
}
static void cnic_free_resc(struct cnic_dev *dev)
{
struct cnic_local *cp = dev->cnic_priv;
struct cnic_uio_dev *udev = cp->udev;
int i = 0;
if (cp->cnic_uinfo) {
while (cp->uio_dev != -1 && i < 15) {
if (udev) {
while (udev->uio_dev != -1 && i < 15) {
msleep(100);
i++;
}
cnic_free_uio(dev);
cnic_free_uio(udev);
cp->udev = NULL;
}
cnic_free_context(dev);
@ -913,37 +911,53 @@ static int cnic_alloc_kcq(struct cnic_dev *dev, struct kcq_info *info)
return 0;
}
static int cnic_alloc_l2_rings(struct cnic_dev *dev, int pages)
static int cnic_alloc_uio_rings(struct cnic_dev *dev, int pages)
{
struct cnic_local *cp = dev->cnic_priv;
struct cnic_uio_dev *udev;
cp->l2_ring_size = pages * BCM_PAGE_SIZE;
cp->l2_ring = dma_alloc_coherent(&dev->pcidev->dev, cp->l2_ring_size,
&cp->l2_ring_map,
GFP_KERNEL | __GFP_COMP);
if (!cp->l2_ring)
udev = kzalloc(sizeof(struct cnic_uio_dev), GFP_ATOMIC);
if (!udev)
return -ENOMEM;
cp->l2_buf_size = (cp->l2_rx_ring_size + 1) * cp->l2_single_buf_size;
cp->l2_buf_size = PAGE_ALIGN(cp->l2_buf_size);
cp->l2_buf = dma_alloc_coherent(&dev->pcidev->dev, cp->l2_buf_size,
&cp->l2_buf_map,
udev->uio_dev = -1;
udev->dev = dev;
udev->pdev = dev->pcidev;
udev->l2_ring_size = pages * BCM_PAGE_SIZE;
udev->l2_ring = dma_alloc_coherent(&udev->pdev->dev, udev->l2_ring_size,
&udev->l2_ring_map,
GFP_KERNEL | __GFP_COMP);
if (!cp->l2_buf)
if (!udev->l2_ring)
return -ENOMEM;
udev->l2_buf_size = (cp->l2_rx_ring_size + 1) * cp->l2_single_buf_size;
udev->l2_buf_size = PAGE_ALIGN(udev->l2_buf_size);
udev->l2_buf = dma_alloc_coherent(&udev->pdev->dev, udev->l2_buf_size,
&udev->l2_buf_map,
GFP_KERNEL | __GFP_COMP);
if (!udev->l2_buf)
return -ENOMEM;
cp->udev = udev;
return 0;
}
static int cnic_alloc_uio(struct cnic_dev *dev) {
static int cnic_init_uio(struct cnic_dev *dev)
{
struct cnic_local *cp = dev->cnic_priv;
struct cnic_uio_dev *udev = cp->udev;
struct uio_info *uinfo;
int ret;
int ret = 0;
uinfo = kzalloc(sizeof(*uinfo), GFP_ATOMIC);
if (!uinfo)
if (!udev)
return -ENOMEM;
udev->uio_dev = -1;
uinfo = &udev->cnic_uinfo;
uinfo->mem[0].addr = dev->netdev->base_addr;
uinfo->mem[0].internal_addr = dev->regview;
uinfo->mem[0].size = dev->netdev->mem_end - dev->netdev->mem_start;
@ -968,12 +982,12 @@ static int cnic_alloc_uio(struct cnic_dev *dev) {
uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
uinfo->mem[2].addr = (unsigned long) cp->l2_ring;
uinfo->mem[2].size = cp->l2_ring_size;
uinfo->mem[2].addr = (unsigned long) udev->l2_ring;
uinfo->mem[2].size = udev->l2_ring_size;
uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
uinfo->mem[3].addr = (unsigned long) cp->l2_buf;
uinfo->mem[3].size = cp->l2_buf_size;
uinfo->mem[3].addr = (unsigned long) udev->l2_buf;
uinfo->mem[3].size = udev->l2_buf_size;
uinfo->mem[3].memtype = UIO_MEM_LOGICAL;
uinfo->version = CNIC_MODULE_VERSION;
@ -982,18 +996,13 @@ static int cnic_alloc_uio(struct cnic_dev *dev) {
uinfo->open = cnic_uio_open;
uinfo->release = cnic_uio_close;
uinfo->priv = dev;
uinfo->priv = udev;
ret = uio_register_device(&udev->pdev->dev, uinfo);
ret = uio_register_device(&dev->pcidev->dev, uinfo);
if (ret) {
kfree(uinfo);
return ret;
}
cp->cnic_uinfo = uinfo;
return 0;
}
static int cnic_alloc_bnx2_resc(struct cnic_dev *dev)
{
struct cnic_local *cp = dev->cnic_priv;
@ -1012,11 +1021,11 @@ static int cnic_alloc_bnx2_resc(struct cnic_dev *dev)
if (ret)
goto error;
ret = cnic_alloc_l2_rings(dev, 2);
ret = cnic_alloc_uio_rings(dev, 2);
if (ret)
goto error;
ret = cnic_alloc_uio(dev);
ret = cnic_init_uio(dev);
if (ret)
goto error;
@ -1150,11 +1159,11 @@ static int cnic_alloc_bnx2x_resc(struct cnic_dev *dev)
cp->l2_rx_ring_size = 15;
ret = cnic_alloc_l2_rings(dev, 4);
ret = cnic_alloc_uio_rings(dev, 4);
if (ret)
goto error;
ret = cnic_alloc_uio(dev);
ret = cnic_init_uio(dev);
if (ret)
goto error;
@ -2226,8 +2235,9 @@ static int cnic_get_kcqes(struct cnic_dev *dev, struct kcq_info *info)
static int cnic_l2_completion(struct cnic_local *cp)
{
u16 hw_cons, sw_cons;
struct cnic_uio_dev *udev = cp->udev;
union eth_rx_cqe *cqe, *cqe_ring = (union eth_rx_cqe *)
(cp->l2_ring + (2 * BCM_PAGE_SIZE));
(udev->l2_ring + (2 * BCM_PAGE_SIZE));
u32 cmd;
int comp = 0;
@ -2273,7 +2283,8 @@ static void cnic_chk_pkt_rings(struct cnic_local *cp)
cp->tx_cons = tx_cons;
cp->rx_cons = rx_cons;
uio_event_notify(cp->cnic_uinfo);
if (cp->udev)
uio_event_notify(&cp->udev->cnic_uinfo);
}
if (comp)
clear_bit(CNIC_LCL_FL_L2_WAIT, &cp->cnic_local_flags);
@ -2435,7 +2446,6 @@ static void cnic_ulp_stop(struct cnic_dev *dev)
struct cnic_local *cp = dev->cnic_priv;
int if_type;
if (cp->cnic_uinfo)
cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
@ -3658,11 +3668,12 @@ static void cnic_init_bnx2_tx_ring(struct cnic_dev *dev)
{
struct cnic_local *cp = dev->cnic_priv;
struct cnic_eth_dev *ethdev = cp->ethdev;
struct cnic_uio_dev *udev = cp->udev;
u32 cid_addr, tx_cid, sb_id;
u32 val, offset0, offset1, offset2, offset3;
int i;
struct tx_bd *txbd;
dma_addr_t buf_map;
dma_addr_t buf_map, ring_map = udev->l2_ring_map;
struct status_block *s_blk = cp->status_blk.gen;
sb_id = cp->status_blk_num;
@ -3704,18 +3715,18 @@ static void cnic_init_bnx2_tx_ring(struct cnic_dev *dev)
val = BNX2_L2CTX_CMD_TYPE_TYPE_L2 | (8 << 16);
cnic_ctx_wr(dev, cid_addr, offset1, val);
txbd = (struct tx_bd *) cp->l2_ring;
txbd = (struct tx_bd *) udev->l2_ring;
buf_map = cp->l2_buf_map;
buf_map = udev->l2_buf_map;
for (i = 0; i < MAX_TX_DESC_CNT; i++, txbd++) {
txbd->tx_bd_haddr_hi = (u64) buf_map >> 32;
txbd->tx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
}
val = (u64) cp->l2_ring_map >> 32;
val = (u64) ring_map >> 32;
cnic_ctx_wr(dev, cid_addr, offset2, val);
txbd->tx_bd_haddr_hi = val;
val = (u64) cp->l2_ring_map & 0xffffffff;
val = (u64) ring_map & 0xffffffff;
cnic_ctx_wr(dev, cid_addr, offset3, val);
txbd->tx_bd_haddr_lo = val;
}
@ -3724,10 +3735,12 @@ static void cnic_init_bnx2_rx_ring(struct cnic_dev *dev)
{
struct cnic_local *cp = dev->cnic_priv;
struct cnic_eth_dev *ethdev = cp->ethdev;
struct cnic_uio_dev *udev = cp->udev;
u32 cid_addr, sb_id, val, coal_reg, coal_val;
int i;
struct rx_bd *rxbd;
struct status_block *s_blk = cp->status_blk.gen;
dma_addr_t ring_map = udev->l2_ring_map;
sb_id = cp->status_blk_num;
cnic_init_context(dev, 2);
@ -3761,22 +3774,22 @@ static void cnic_init_bnx2_rx_ring(struct cnic_dev *dev)
val = BNX2_L2CTX_L2_STATUSB_NUM(sb_id);
cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_HOST_BDIDX, val);
rxbd = (struct rx_bd *) (cp->l2_ring + BCM_PAGE_SIZE);
rxbd = (struct rx_bd *) (udev->l2_ring + BCM_PAGE_SIZE);
for (i = 0; i < MAX_RX_DESC_CNT; i++, rxbd++) {
dma_addr_t buf_map;
int n = (i % cp->l2_rx_ring_size) + 1;
buf_map = cp->l2_buf_map + (n * cp->l2_single_buf_size);
buf_map = udev->l2_buf_map + (n * cp->l2_single_buf_size);
rxbd->rx_bd_len = cp->l2_single_buf_size;
rxbd->rx_bd_flags = RX_BD_FLAGS_START | RX_BD_FLAGS_END;
rxbd->rx_bd_haddr_hi = (u64) buf_map >> 32;
rxbd->rx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
}
val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) >> 32;
val = (u64) (ring_map + BCM_PAGE_SIZE) >> 32;
cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_HI, val);
rxbd->rx_bd_haddr_hi = val;
val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) & 0xffffffff;
val = (u64) (ring_map + BCM_PAGE_SIZE) & 0xffffffff;
cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_LO, val);
rxbd->rx_bd_haddr_lo = val;
@ -4038,8 +4051,9 @@ static void cnic_init_bnx2x_tx_ring(struct cnic_dev *dev,
struct client_init_ramrod_data *data)
{
struct cnic_local *cp = dev->cnic_priv;
union eth_tx_bd_types *txbd = (union eth_tx_bd_types *) cp->l2_ring;
dma_addr_t buf_map, ring_map = cp->l2_ring_map;
struct cnic_uio_dev *udev = cp->udev;
union eth_tx_bd_types *txbd = (union eth_tx_bd_types *) udev->l2_ring;
dma_addr_t buf_map, ring_map = udev->l2_ring_map;
struct host_sp_status_block *sb = cp->bnx2x_def_status_blk;
int port = CNIC_PORT(cp);
int i;
@ -4048,7 +4062,7 @@ static void cnic_init_bnx2x_tx_ring(struct cnic_dev *dev,
memset(txbd, 0, BCM_PAGE_SIZE);
buf_map = cp->l2_buf_map;
buf_map = udev->l2_buf_map;
for (i = 0; i < MAX_TX_DESC_CNT; i += 3, txbd += 3) {
struct eth_tx_start_bd *start_bd = &txbd->start_bd;
struct eth_tx_bd *reg_bd = &((txbd + 2)->reg_bd);
@ -4096,17 +4110,18 @@ static void cnic_init_bnx2x_rx_ring(struct cnic_dev *dev,
struct client_init_ramrod_data *data)
{
struct cnic_local *cp = dev->cnic_priv;
struct eth_rx_bd *rxbd = (struct eth_rx_bd *) (cp->l2_ring +
struct cnic_uio_dev *udev = cp->udev;
struct eth_rx_bd *rxbd = (struct eth_rx_bd *) (udev->l2_ring +
BCM_PAGE_SIZE);
struct eth_rx_cqe_next_page *rxcqe = (struct eth_rx_cqe_next_page *)
(cp->l2_ring + (2 * BCM_PAGE_SIZE));
(udev->l2_ring + (2 * BCM_PAGE_SIZE));
struct host_sp_status_block *sb = cp->bnx2x_def_status_blk;
int i;
int port = CNIC_PORT(cp);
int cli = BNX2X_ISCSI_CL_ID(CNIC_E1HVN(cp));
int cl_qzone_id = BNX2X_CL_QZONE_ID(cp, cli);
u32 val;
dma_addr_t ring_map = cp->l2_ring_map;
dma_addr_t ring_map = udev->l2_ring_map;
/* General data */
data->general.client_id = cli;
@ -4119,7 +4134,7 @@ static void cnic_init_bnx2x_rx_ring(struct cnic_dev *dev,
dma_addr_t buf_map;
int n = (i % cp->l2_rx_ring_size) + 1;
buf_map = cp->l2_buf_map + (n * cp->l2_single_buf_size);
buf_map = udev->l2_buf_map + (n * cp->l2_single_buf_size);
rxbd->addr_hi = cpu_to_le32((u64) buf_map >> 32);
rxbd->addr_lo = cpu_to_le32(buf_map & 0xffffffff);
}
@ -4320,6 +4335,7 @@ static int cnic_start_bnx2x_hw(struct cnic_dev *dev)
static void cnic_init_rings(struct cnic_dev *dev)
{
struct cnic_local *cp = dev->cnic_priv;
struct cnic_uio_dev *udev = cp->udev;
if (test_bit(CNIC_LCL_FL_RINGS_INITED, &cp->cnic_local_flags))
return;
@ -4350,15 +4366,15 @@ static void cnic_init_rings(struct cnic_dev *dev)
set_bit(CNIC_LCL_FL_L2_WAIT, &cp->cnic_local_flags);
data = cp->l2_buf;
data = udev->l2_buf;
memset(data, 0, sizeof(*data));
cnic_init_bnx2x_tx_ring(dev, data);
cnic_init_bnx2x_rx_ring(dev, data);
l5_data.phy_address.lo = cp->l2_buf_map & 0xffffffff;
l5_data.phy_address.hi = (u64) cp->l2_buf_map >> 32;
l5_data.phy_address.lo = udev->l2_buf_map & 0xffffffff;
l5_data.phy_address.hi = (u64) udev->l2_buf_map >> 32;
type = (ETH_CONNECTION_TYPE << SPE_HDR_CONN_TYPE_SHIFT)
& SPE_HDR_CONN_TYPE;
@ -4539,7 +4555,7 @@ static void cnic_stop_hw(struct cnic_dev *dev)
/* Need to wait for the ring shutdown event to complete
* before clearing the CNIC_UP flag.
*/
while (cp->uio_dev != -1 && i < 15) {
while (cp->udev->uio_dev != -1 && i < 15) {
msleep(100);
i++;
}
@ -4591,7 +4607,6 @@ static struct cnic_dev *cnic_alloc_dev(struct net_device *dev,
cp = cdev->cnic_priv;
cp->dev = cdev;
cp->uio_dev = -1;
cp->l2_single_buf_size = 0x400;
cp->l2_rx_ring_size = 3;

29
drivers/net/cnic.h
View File

@ -195,6 +195,23 @@ struct iro {
u16 size;
};
struct cnic_uio_dev {
struct uio_info cnic_uinfo;
u32 uio_dev;
int l2_ring_size;
void *l2_ring;
dma_addr_t l2_ring_map;
int l2_buf_size;
void *l2_buf;
dma_addr_t l2_buf_map;
struct cnic_dev *dev;
struct pci_dev *pdev;
struct list_head list;
};
struct cnic_local {
spinlock_t cnic_ulp_lock;
@ -214,14 +231,9 @@ struct cnic_local {
struct cnic_eth_dev *ethdev;
void *l2_ring;
dma_addr_t l2_ring_map;
int l2_ring_size;
int l2_rx_ring_size;
struct cnic_uio_dev *udev;
void *l2_buf;
dma_addr_t l2_buf_map;
int l2_buf_size;
int l2_rx_ring_size;
int l2_single_buf_size;
u16 *rx_cons_ptr;
@ -301,9 +313,6 @@ struct cnic_local {
u32 pfid;
u32 shmem_base;
u32 uio_dev;
struct uio_info *cnic_uinfo;
struct cnic_ops *cnic_ops;
int (*start_hw)(struct cnic_dev *);
void (*stop_hw)(struct cnic_dev *);