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nfp: make vNIC ctrl memory mapping function reusable

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We will soon need to map control vNIC PCI memory as well as data vNIC
memory.  Make the function for mapping areas pointed to by an RTsym
reusable.

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 2017-06-05 17:01:51 -07:00 committed by David S. Miller
parent 77ece8d5f1
commit c24ca95ff6
1 changed files with 28 additions and 27 deletions
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55
drivers/net/ethernet/netronome/nfp/nfp_net_main.c
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@ -248,40 +248,37 @@ nfp_net_pf_total_qcs(struct nfp_pf *pf, void __iomem *ctrl_bar,
return max_qc - min_qc;
}
static u8 __iomem *nfp_net_pf_map_ctrl_bar(struct nfp_pf *pf)
static u8 __iomem *
nfp_net_pf_map_rtsym(struct nfp_pf *pf, const char *name, const char *sym_fmt,
unsigned int min_size, struct nfp_cpp_area **area)
{
const struct nfp_rtsym *ctrl_sym;
u8 __iomem *ctrl_bar;
const struct nfp_rtsym *sym;
char pf_symbol[256];
u8 __iomem *mem;
snprintf(pf_symbol, sizeof(pf_symbol), "_pf%u_net_bar0",
snprintf(pf_symbol, sizeof(pf_symbol), sym_fmt,
nfp_cppcore_pcie_unit(pf->cpp));
ctrl_sym = nfp_rtsym_lookup(pf->cpp, pf_symbol);
if (!ctrl_sym) {
dev_err(&pf->pdev->dev,
"Failed to find PF BAR0 symbol %s\n", pf_symbol);
return NULL;
sym = nfp_rtsym_lookup(pf->cpp, pf_symbol);
if (!sym) {
nfp_err(pf->cpp, "Failed to find PF symbol %s\n", pf_symbol);
return (u8 __iomem *)ERR_PTR(-ENOENT);
}
if (ctrl_sym->size < pf->max_data_vnics * NFP_PF_CSR_SLICE_SIZE) {
dev_err(&pf->pdev->dev,
"PF BAR0 too small to contain %d vNICs\n",
pf->max_data_vnics);
return NULL;
if (sym->size < min_size) {
nfp_err(pf->cpp, "PF symbol %s too small\n", pf_symbol);
return (u8 __iomem *)ERR_PTR(-EINVAL);
}
ctrl_bar = nfp_net_map_area(pf->cpp, "net.ctrl",
ctrl_sym->domain, ctrl_sym->target,
ctrl_sym->addr, ctrl_sym->size,
&pf->data_vnic_bar);
if (IS_ERR(ctrl_bar)) {
dev_err(&pf->pdev->dev, "Failed to map PF BAR0: %ld\n",
PTR_ERR(ctrl_bar));
return NULL;
mem = nfp_net_map_area(pf->cpp, name, sym->domain, sym->target,
sym->addr, sym->size, area);
if (IS_ERR(mem)) {
nfp_err(pf->cpp, "Failed to map PF symbol %s: %ld\n",
pf_symbol, PTR_ERR(mem));
return mem;
}
return ctrl_bar;
return mem;
}
static void nfp_net_pf_free_vnic(struct nfp_pf *pf, struct nfp_net *nn)
@ -662,10 +659,10 @@ int nfp_net_refresh_eth_port(struct nfp_port *port)
*/
int nfp_net_pci_probe(struct nfp_pf *pf)
{
u32 ctrl_bar_sz, tx_area_sz, rx_area_sz;
u8 __iomem *ctrl_bar, *tx_bar, *rx_bar;
u32 total_tx_qcs, total_rx_qcs;
struct nfp_net_fw_version fw_ver;
u32 tx_area_sz, rx_area_sz;
u32 start_q;
int stride;
int err;
@ -685,9 +682,13 @@ int nfp_net_pci_probe(struct nfp_pf *pf)
goto err_unlock;
}
ctrl_bar = nfp_net_pf_map_ctrl_bar(pf);
if (!ctrl_bar) {
err = pf->fw_loaded ? -EINVAL : -EPROBE_DEFER;
ctrl_bar_sz = pf->max_data_vnics * NFP_PF_CSR_SLICE_SIZE;
ctrl_bar = nfp_net_pf_map_rtsym(pf, "net.ctrl", "_pf%d_net_bar0",
ctrl_bar_sz, &pf->data_vnic_bar);
if (IS_ERR(ctrl_bar)) {
err = PTR_ERR(ctrl_bar);
if (!pf->fw_loaded && err == -ENOENT)
err = -EPROBE_DEFER;
goto err_unlock;
}