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netxen_nic: fix cdrp race condition

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Reading CRB registers(if reqd) before releasing the api lock.

Signed-off-by: Sritej Velaga <sritej.velaga@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sritej Velaga 2012-02-03 11:35:10 +00:00 committed by David S. Miller
parent e1f4c485cd
commit 2dcd5d95ad
2 changed files with 85 additions and 68 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

12
drivers/net/ethernet/qlogic/netxen/netxen_nic.h
View file

@ -686,6 +686,18 @@ struct netxen_recv_context {
dma_addr_t phys_addr;
};
struct _cdrp_cmd {
u32 cmd;
u32 arg1;
u32 arg2;
u32 arg3;
};
struct netxen_cmd_args {
struct _cdrp_cmd req;
struct _cdrp_cmd rsp;
};
/* New HW context creation */
#define NX_OS_CRB_RETRY_COUNT 4000

141
drivers/net/ethernet/qlogic/netxen/netxen_nic_ctx.c
View file

@ -48,28 +48,27 @@ netxen_poll_rsp(struct netxen_adapter *adapter)
}
static u32
netxen_issue_cmd(struct netxen_adapter *adapter,
u32 pci_fn, u32 version, u32 arg1, u32 arg2, u32 arg3, u32 cmd)
netxen_issue_cmd(struct netxen_adapter *adapter, struct netxen_cmd_args *cmd)
{
u32 rsp;
u32 signature = 0;
u32 rcode = NX_RCODE_SUCCESS;
signature = NX_CDRP_SIGNATURE_MAKE(pci_fn, version);
signature = NX_CDRP_SIGNATURE_MAKE(adapter->ahw.pci_func,
NXHAL_VERSION);
/* Acquire semaphore before accessing CRB */
if (netxen_api_lock(adapter))
return NX_RCODE_TIMEOUT;
NXWR32(adapter, NX_SIGN_CRB_OFFSET, signature);
NXWR32(adapter, NX_ARG1_CRB_OFFSET, arg1);
NXWR32(adapter, NX_ARG1_CRB_OFFSET, cmd->req.arg1);
NXWR32(adapter, NX_ARG2_CRB_OFFSET, arg2);
NXWR32(adapter, NX_ARG2_CRB_OFFSET, cmd->req.arg2);
NXWR32(adapter, NX_ARG3_CRB_OFFSET, arg3);
NXWR32(adapter, NX_ARG3_CRB_OFFSET, cmd->req.arg3);
NXWR32(adapter, NX_CDRP_CRB_OFFSET, NX_CDRP_FORM_CMD(cmd));
NXWR32(adapter, NX_CDRP_CRB_OFFSET, NX_CDRP_FORM_CMD(cmd->req.cmd));
rsp = netxen_poll_rsp(adapter);
@ -83,8 +82,15 @@ netxen_issue_cmd(struct netxen_adapter *adapter,
printk(KERN_ERR "%s: failed card response code:0x%x\n",
netxen_nic_driver_name, rcode);
} else if (rsp == NX_CDRP_RSP_OK) {
if (cmd->rsp.arg2)
cmd->rsp.arg2 = NXRD32(adapter, NX_ARG2_CRB_OFFSET);
if (cmd->rsp.arg3)
cmd->rsp.arg3 = NXRD32(adapter, NX_ARG3_CRB_OFFSET);
}
if (cmd->rsp.arg1)
cmd->rsp.arg1 = NXRD32(adapter, NX_ARG1_CRB_OFFSET);
/* Release semaphore */
netxen_api_unlock(adapter);
@ -96,15 +102,16 @@ nx_fw_cmd_set_mtu(struct netxen_adapter *adapter, int mtu)
{
u32 rcode = NX_RCODE_SUCCESS;
struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
struct netxen_cmd_args cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.req.cmd = NX_CDRP_CMD_SET_MTU;
cmd.req.arg1 = recv_ctx->context_id;
cmd.req.arg2 = mtu;
cmd.req.arg3 = 0;
if (recv_ctx->state == NX_HOST_CTX_STATE_ACTIVE)
rcode = netxen_issue_cmd(adapter,
adapter->ahw.pci_func,
NXHAL_VERSION,
recv_ctx->context_id,
mtu,
0,
NX_CDRP_CMD_SET_MTU);
netxen_issue_cmd(adapter, &cmd);
if (rcode != NX_RCODE_SUCCESS)
return -EIO;
@ -116,15 +123,14 @@ int
nx_fw_cmd_set_gbe_port(struct netxen_adapter *adapter,
u32 speed, u32 duplex, u32 autoneg)
{
struct netxen_cmd_args cmd;
return netxen_issue_cmd(adapter,
adapter->ahw.pci_func,
NXHAL_VERSION,
speed,
duplex,
autoneg,
NX_CDRP_CMD_CONFIG_GBE_PORT);
memset(&cmd, 0, sizeof(cmd));
cmd.req.cmd = NX_CDRP_CMD_CONFIG_GBE_PORT;
cmd.req.arg1 = speed;
cmd.req.arg2 = duplex;
cmd.req.arg3 = autoneg;
return netxen_issue_cmd(adapter, &cmd);
}
static int
@ -139,6 +145,7 @@ nx_fw_cmd_create_rx_ctx(struct netxen_adapter *adapter)
nx_cardrsp_sds_ring_t *prsp_sds;
struct nx_host_rds_ring *rds_ring;
struct nx_host_sds_ring *sds_ring;
struct netxen_cmd_args cmd;
dma_addr_t hostrq_phys_addr, cardrsp_phys_addr;
u64 phys_addr;
@ -218,13 +225,12 @@ nx_fw_cmd_create_rx_ctx(struct netxen_adapter *adapter)
}
phys_addr = hostrq_phys_addr;
err = netxen_issue_cmd(adapter,
adapter->ahw.pci_func,
NXHAL_VERSION,
(u32)(phys_addr >> 32),
(u32)(phys_addr & 0xffffffff),
rq_size,
NX_CDRP_CMD_CREATE_RX_CTX);
memset(&cmd, 0, sizeof(cmd));
cmd.req.arg1 = (u32)(phys_addr >> 32);
cmd.req.arg2 = (u32)(phys_addr & 0xffffffff);
cmd.req.arg3 = rq_size;
cmd.req.cmd = NX_CDRP_CMD_CREATE_RX_CTX;
err = netxen_issue_cmd(adapter, &cmd);
if (err) {
printk(KERN_WARNING
"Failed to create rx ctx in firmware%d\n", err);
@ -273,15 +279,15 @@ static void
nx_fw_cmd_destroy_rx_ctx(struct netxen_adapter *adapter)
{
struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
struct netxen_cmd_args cmd;
if (netxen_issue_cmd(adapter,
adapter->ahw.pci_func,
NXHAL_VERSION,
recv_ctx->context_id,
NX_DESTROY_CTX_RESET,
0,
NX_CDRP_CMD_DESTROY_RX_CTX)) {
memset(&cmd, 0, sizeof(cmd));
cmd.req.arg1 = recv_ctx->context_id;
cmd.req.arg2 = NX_DESTROY_CTX_RESET;
cmd.req.arg3 = 0;
cmd.req.cmd = NX_CDRP_CMD_DESTROY_RX_CTX;
if (netxen_issue_cmd(adapter, &cmd)) {
printk(KERN_WARNING
"%s: Failed to destroy rx ctx in firmware\n",
netxen_nic_driver_name);
@ -302,6 +308,7 @@ nx_fw_cmd_create_tx_ctx(struct netxen_adapter *adapter)
dma_addr_t rq_phys_addr, rsp_phys_addr;
struct nx_host_tx_ring *tx_ring = adapter->tx_ring;
struct netxen_recv_context *recv_ctx = &adapter->recv_ctx;
struct netxen_cmd_args cmd;
rq_size = SIZEOF_HOSTRQ_TX(nx_hostrq_tx_ctx_t);
rq_addr = pci_alloc_consistent(adapter->pdev,
@ -345,13 +352,12 @@ nx_fw_cmd_create_tx_ctx(struct netxen_adapter *adapter)
prq_cds->ring_size = cpu_to_le32(tx_ring->num_desc);
phys_addr = rq_phys_addr;
err = netxen_issue_cmd(adapter,
adapter->ahw.pci_func,
NXHAL_VERSION,
(u32)(phys_addr >> 32),
((u32)phys_addr & 0xffffffff),
rq_size,
NX_CDRP_CMD_CREATE_TX_CTX);
memset(&cmd, 0, sizeof(cmd));
cmd.req.arg1 = (u32)(phys_addr >> 32);
cmd.req.arg2 = ((u32)phys_addr & 0xffffffff);
cmd.req.arg3 = rq_size;
cmd.req.cmd = NX_CDRP_CMD_CREATE_TX_CTX;
err = netxen_issue_cmd(adapter, &cmd);
if (err == NX_RCODE_SUCCESS) {
temp = le32_to_cpu(prsp->cds_ring.host_producer_crb);
@ -380,14 +386,14 @@ nx_fw_cmd_create_tx_ctx(struct netxen_adapter *adapter)
static void
nx_fw_cmd_destroy_tx_ctx(struct netxen_adapter *adapter)
{
if (netxen_issue_cmd(adapter,
adapter->ahw.pci_func,
NXHAL_VERSION,
adapter->tx_context_id,
NX_DESTROY_CTX_RESET,
0,
NX_CDRP_CMD_DESTROY_TX_CTX)) {
struct netxen_cmd_args cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.req.arg1 = adapter->tx_context_id;
cmd.req.arg2 = NX_DESTROY_CTX_RESET;
cmd.req.arg3 = 0;
cmd.req.cmd = NX_CDRP_CMD_DESTROY_TX_CTX;
if (netxen_issue_cmd(adapter, &cmd)) {
printk(KERN_WARNING
"%s: Failed to destroy tx ctx in firmware\n",
netxen_nic_driver_name);
@ -398,34 +404,33 @@ int
nx_fw_cmd_query_phy(struct netxen_adapter *adapter, u32 reg, u32 *val)
{
u32 rcode;
struct netxen_cmd_args cmd;
rcode = netxen_issue_cmd(adapter,
adapter->ahw.pci_func,
NXHAL_VERSION,
reg,
0,
0,
NX_CDRP_CMD_READ_PHY);
memset(&cmd, 0, sizeof(cmd));
cmd.req.arg1 = reg;
cmd.req.arg2 = 0;
cmd.req.arg3 = 0;
cmd.req.cmd = NX_CDRP_CMD_READ_PHY;
cmd.rsp.arg1 = 1;
rcode = netxen_issue_cmd(adapter, &cmd);
if (rcode != NX_RCODE_SUCCESS)
return -EIO;
return NXRD32(adapter, NX_ARG1_CRB_OFFSET);
return cmd.rsp.arg1;
}
int
nx_fw_cmd_set_phy(struct netxen_adapter *adapter, u32 reg, u32 val)
{
u32 rcode;
struct netxen_cmd_args cmd;
rcode = netxen_issue_cmd(adapter,
adapter->ahw.pci_func,
NXHAL_VERSION,
reg,
val,
0,
NX_CDRP_CMD_WRITE_PHY);
memset(&cmd, 0, sizeof(cmd));
cmd.req.arg1 = reg;
cmd.req.arg2 = val;
cmd.req.arg3 = 0;
cmd.req.cmd = NX_CDRP_CMD_WRITE_PHY;
rcode = netxen_issue_cmd(adapter, &cmd);
if (rcode != NX_RCODE_SUCCESS)
return -EIO;