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nfp: remove automatic caching of HWInfo

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Make callers take care of managing life time of HWInfo.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2017-06-08 20:56:12 -07:00 committed by David S. Miller
parent af4fa7eac7
commit 9baa48859b
8 changed files with 54 additions and 79 deletions
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2
drivers/net/ethernet/netronome/nfp/nfp_app_nic.c
View File

@ -80,7 +80,7 @@ int nfp_app_nic_vnic_init(struct nfp_app *app, struct nfp_net *nn,
if (err)
return err < 0 ? err : 0;
nfp_net_get_mac_addr(nn, app->cpp, id);
nfp_net_get_mac_addr(app->pf, nn, id);
return 0;
}

20
drivers/net/ethernet/netronome/nfp/nfp_main.c
View File

@ -170,7 +170,7 @@ nfp_net_fw_find(struct pci_dev *pdev, struct nfp_pf *pf)
return NULL;
}
fw_model = nfp_hwinfo_lookup(pf->cpp, "assembly.partno");
fw_model = nfp_hwinfo_lookup(pf->hwinfo, "assembly.partno");
if (!fw_model) {
dev_err(&pdev->dev, "Error: can't read part number\n");
return NULL;
@ -358,16 +358,18 @@ static int nfp_pci_probe(struct pci_dev *pdev,
goto err_disable_msix;
}
pf->hwinfo = nfp_hwinfo_read(pf->cpp);
dev_info(&pdev->dev, "Assembly: %s%s%s-%s CPLD: %s\n",
nfp_hwinfo_lookup(pf->cpp, "assembly.vendor"),
nfp_hwinfo_lookup(pf->cpp, "assembly.partno"),
nfp_hwinfo_lookup(pf->cpp, "assembly.serial"),
nfp_hwinfo_lookup(pf->cpp, "assembly.revision"),
nfp_hwinfo_lookup(pf->cpp, "cpld.version"));
nfp_hwinfo_lookup(pf->hwinfo, "assembly.vendor"),
nfp_hwinfo_lookup(pf->hwinfo, "assembly.partno"),
nfp_hwinfo_lookup(pf->hwinfo, "assembly.serial"),
nfp_hwinfo_lookup(pf->hwinfo, "assembly.revision"),
nfp_hwinfo_lookup(pf->hwinfo, "cpld.version"));
err = devlink_register(devlink, &pdev->dev);
if (err)
goto err_cpp_free;
goto err_hwinfo_free;
err = nfp_nsp_init(pdev, pf);
if (err)
@ -403,7 +405,8 @@ err_fw_unload:
kfree(pf->nspi);
err_devlink_unreg:
devlink_unregister(devlink);
err_cpp_free:
err_hwinfo_free:
kfree(pf->hwinfo);
nfp_cpp_free(pf->cpp);
err_disable_msix:
pci_set_drvdata(pdev, NULL);
@ -438,6 +441,7 @@ static void nfp_pci_remove(struct pci_dev *pdev)
nfp_fw_unload(pf);
pci_set_drvdata(pdev, NULL);
kfree(pf->hwinfo);
nfp_cpp_free(pf->cpp);
kfree(pf->eth_tbl);

5
drivers/net/ethernet/netronome/nfp/nfp_main.h
View File

@ -54,6 +54,7 @@ struct pci_dev;
struct nfp_cpp;
struct nfp_cpp_area;
struct nfp_eth_table;
struct nfp_hwinfo;
struct nfp_net;
struct nfp_nsp_identify;
struct nfp_rtsym_table;
@ -72,6 +73,7 @@ struct nfp_rtsym_table;
* @fw_loaded: Is the firmware loaded?
* @ctrl_vnic: Pointer to the control vNIC if available
* @rtbl: RTsym table
* @hwinfo: HWInfo table
* @eth_tbl: NSP ETH table
* @nspi: NSP identification info
* @hwmon_dev: pointer to hwmon device
@ -104,6 +106,7 @@ struct nfp_pf {
struct nfp_net *ctrl_vnic;
struct nfp_rtsym_table *rtbl;
struct nfp_hwinfo *hwinfo;
struct nfp_eth_table *eth_tbl;
struct nfp_nsp_identify *nspi;
@ -133,7 +136,7 @@ void nfp_hwmon_unregister(struct nfp_pf *pf);
struct nfp_eth_table_port *
nfp_net_find_port(struct nfp_eth_table *eth_tbl, unsigned int id);
void
nfp_net_get_mac_addr(struct nfp_net *nn, struct nfp_cpp *cpp, unsigned int id);
nfp_net_get_mac_addr(struct nfp_pf *pf, struct nfp_net *nn, unsigned int id);
bool nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb);

12
drivers/net/ethernet/netronome/nfp/nfp_net_main.c
View File

@ -63,13 +63,13 @@
#define NFP_PF_CSR_SLICE_SIZE (32 * 1024)
static int nfp_is_ready(struct nfp_cpp *cpp)
static int nfp_is_ready(struct nfp_pf *pf)
{
const char *cp;
long state;
int err;
cp = nfp_hwinfo_lookup(cpp, "board.state");
cp = nfp_hwinfo_lookup(pf->hwinfo, "board.state");
if (!cp)
return 0;
@ -134,15 +134,15 @@ err_area:
/**
* nfp_net_get_mac_addr() - Get the MAC address.
* @pf: NFP PF handle
* @nn: NFP Network structure
* @cpp: NFP CPP handle
* @id: NFP port id
*
* First try to get the MAC address from NSP ETH table. If that
* fails try HWInfo. As a last resort generate a random address.
*/
void
nfp_net_get_mac_addr(struct nfp_net *nn, struct nfp_cpp *cpp, unsigned int id)
nfp_net_get_mac_addr(struct nfp_pf *pf, struct nfp_net *nn, unsigned int id)
{
struct nfp_eth_table_port *eth_port;
struct nfp_net_dp *dp = &nn->dp;
@ -159,7 +159,7 @@ nfp_net_get_mac_addr(struct nfp_net *nn, struct nfp_cpp *cpp, unsigned int id)
snprintf(name, sizeof(name), "eth%d.mac", id);
mac_str = nfp_hwinfo_lookup(cpp, name);
mac_str = nfp_hwinfo_lookup(pf->hwinfo, name);
if (!mac_str) {
dev_warn(dp->dev, "Can't lookup MAC address. Generate\n");
eth_hw_addr_random(dp->netdev);
@ -713,7 +713,7 @@ int nfp_net_pci_probe(struct nfp_pf *pf)
INIT_WORK(&pf->port_refresh_work, nfp_net_refresh_vnics);
/* Verify that the board has completed initialization */
if (!nfp_is_ready(pf->cpp)) {
if (!nfp_is_ready(pf)) {
nfp_err(pf->cpp, "NFP is not ready for NIC operation.\n");
return -EINVAL;
}

4
drivers/net/ethernet/netronome/nfp/nfpcore/nfp.h
View File

@ -46,7 +46,9 @@
/* Implemented in nfp_hwinfo.c */
const char *nfp_hwinfo_lookup(struct nfp_cpp *cpp, const char *lookup);
struct nfp_hwinfo;
struct nfp_hwinfo *nfp_hwinfo_read(struct nfp_cpp *cpp);
const char *nfp_hwinfo_lookup(struct nfp_hwinfo *hwinfo, const char *lookup);
/* Implemented in nfp_nsp.c, low level functions */

3
drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cpp.h
View File

@ -222,9 +222,6 @@ u32 nfp_cpp_model(struct nfp_cpp *cpp);
u16 nfp_cpp_interface(struct nfp_cpp *cpp);
int nfp_cpp_serial(struct nfp_cpp *cpp, const u8 **serial);
void *nfp_hwinfo_cache(struct nfp_cpp *cpp);
void nfp_hwinfo_cache_set(struct nfp_cpp *cpp, void *val);
struct nfp_cpp_area *nfp_cpp_area_alloc_with_name(struct nfp_cpp *cpp,
u32 cpp_id,
const char *name,

17
drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c
View File

@ -76,9 +76,6 @@ struct nfp_cpp_resource {
* @serial: chip serial number
* @imb_cat_table: CPP Mapping Table
*
* Following fields can be used only in probe() or with rtnl held:
* @hwinfo: HWInfo database fetched from the device
*
* Following fields use explicit locking:
* @resource_list: NFP CPP resource list
* @resource_lock: protects @resource_list
@ -106,8 +103,6 @@ struct nfp_cpp {
struct mutex area_cache_mutex;
struct list_head area_cache_list;
void *hwinfo;
};
/* Element of the area_cache_list */
@ -231,8 +226,6 @@ void nfp_cpp_free(struct nfp_cpp *cpp)
if (cpp->op->free)
cpp->op->free(cpp);
kfree(cpp->hwinfo);
device_unregister(&cpp->dev);
kfree(cpp);
@ -273,16 +266,6 @@ int nfp_cpp_serial(struct nfp_cpp *cpp, const u8 **serial)
return sizeof(cpp->serial);
}
void *nfp_hwinfo_cache(struct nfp_cpp *cpp)
{
return cpp->hwinfo;
}
void nfp_hwinfo_cache_set(struct nfp_cpp *cpp, void *val)
{
cpp->hwinfo = val;
}
/**
* nfp_cpp_area_alloc_with_name() - allocate a new CPP area
* @cpp: CPP device handle

70
drivers/net/ethernet/netronome/nfp/nfpcore/nfp_hwinfo.c
View File

@ -178,7 +178,8 @@ hwinfo_db_validate(struct nfp_cpp *cpp, struct nfp_hwinfo *db, u32 len)
return hwinfo_db_walk(cpp, db, size);
}
static int hwinfo_try_fetch(struct nfp_cpp *cpp, size_t *cpp_size)
static struct nfp_hwinfo *
hwinfo_try_fetch(struct nfp_cpp *cpp, size_t *cpp_size)
{
struct nfp_hwinfo *header;
struct nfp_resource *res;
@ -196,7 +197,7 @@ static int hwinfo_try_fetch(struct nfp_cpp *cpp, size_t *cpp_size)
nfp_resource_release(res);
if (*cpp_size < HWINFO_SIZE_MIN)
return -ENOENT;
return NULL;
} else if (PTR_ERR(res) == -ENOENT) {
/* Try getting the HWInfo table from the 'classic' location */
cpp_id = NFP_CPP_ISLAND_ID(NFP_CPP_TARGET_MU,
@ -204,101 +205,86 @@ static int hwinfo_try_fetch(struct nfp_cpp *cpp, size_t *cpp_size)
cpp_addr = 0x30000;
*cpp_size = 0x0e000;
} else {
return PTR_ERR(res);
return NULL;
}
db = kmalloc(*cpp_size + 1, GFP_KERNEL);
if (!db)
return -ENOMEM;
return NULL;
err = nfp_cpp_read(cpp, cpp_id, cpp_addr, db, *cpp_size);
if (err != *cpp_size) {
kfree(db);
return err < 0 ? err : -EIO;
}
if (err != *cpp_size)
goto exit_free;
header = (void *)db;
if (nfp_hwinfo_is_updating(header)) {
kfree(db);
return -EBUSY;
}
if (nfp_hwinfo_is_updating(header))
goto exit_free;
if (le32_to_cpu(header->version) != NFP_HWINFO_VERSION_2) {
nfp_err(cpp, "Unknown HWInfo version: 0x%08x\n",
le32_to_cpu(header->version));
kfree(db);
return -EINVAL;
goto exit_free;
}
/* NULL-terminate for safety */
db[*cpp_size] = '\0';
nfp_hwinfo_cache_set(cpp, db);
return 0;
return (void *)db;
exit_free:
kfree(db);
return NULL;
}
static int hwinfo_fetch(struct nfp_cpp *cpp, size_t *hwdb_size)
static struct nfp_hwinfo *hwinfo_fetch(struct nfp_cpp *cpp, size_t *hwdb_size)
{
const unsigned long wait_until = jiffies + HWINFO_WAIT * HZ;
struct nfp_hwinfo *db;
int err;
for (;;) {
const unsigned long start_time = jiffies;
err = hwinfo_try_fetch(cpp, hwdb_size);
if (!err)
return 0;
db = hwinfo_try_fetch(cpp, hwdb_size);
if (db)
return db;
err = msleep_interruptible(100);
if (err || time_after(start_time, wait_until)) {
nfp_err(cpp, "NFP access error\n");
return -EIO;
return NULL;
}
}
}
static int nfp_hwinfo_load(struct nfp_cpp *cpp)
struct nfp_hwinfo *nfp_hwinfo_read(struct nfp_cpp *cpp)
{
struct nfp_hwinfo *db;
size_t hwdb_size = 0;
int err;
err = hwinfo_fetch(cpp, &hwdb_size);
if (err)
return err;
db = hwinfo_fetch(cpp, &hwdb_size);
if (!db)
return NULL;
db = nfp_hwinfo_cache(cpp);
err = hwinfo_db_validate(cpp, db, hwdb_size);
if (err) {
kfree(db);
nfp_hwinfo_cache_set(cpp, NULL);
return err;
return NULL;
}
return 0;
return db;
}
/**
* nfp_hwinfo_lookup() - Find a value in the HWInfo table by name
* @cpp: NFP CPP handle
* @hwinfo: NFP HWinfo table
* @lookup: HWInfo name to search for
*
* Return: Value of the HWInfo name, or NULL
*/
const char *nfp_hwinfo_lookup(struct nfp_cpp *cpp, const char *lookup)
const char *nfp_hwinfo_lookup(struct nfp_hwinfo *hwinfo, const char *lookup)
{
const char *key, *val, *end;
struct nfp_hwinfo *hwinfo;
int err;
hwinfo = nfp_hwinfo_cache(cpp);
if (!hwinfo) {
err = nfp_hwinfo_load(cpp);
if (err)
return NULL;
hwinfo = nfp_hwinfo_cache(cpp);
}
if (!hwinfo || !lookup)
return NULL;