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cxgb4vf: Add code to provision T4 PCI-E SR-IOV Virtual Functions with hardware resources 

Add code to provision T4 PCI-E SR-IOV Virtual Functions with hardware
resources.

Signed-off-by: Casey Leedom
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Casey Leedom 2010-06-25 12:11:46 +00:00 committed by David S. Miller
parent 17edf2594f
commit 7ee9ff9485
1 changed files with 106 additions and 0 deletions
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106
drivers/net/cxgb4/cxgb4_main.c
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@ -77,6 +77,76 @@
*/
#define MAX_SGE_TIMERVAL 200U
#ifdef CONFIG_PCI_IOV
/*
* Virtual Function provisioning constants. We need two extra Ingress Queues
* with Interrupt capability to serve as the VF's Firmware Event Queue and
* Forwarded Interrupt Queue (when using MSI mode) -- neither will have Free
* Lists associated with them). For each Ethernet/Control Egress Queue and
* for each Free List, we need an Egress Context.
*/
enum {
VFRES_NPORTS = 1, /* # of "ports" per VF */
VFRES_NQSETS = 2, /* # of "Queue Sets" per VF */
VFRES_NVI = VFRES_NPORTS, /* # of Virtual Interfaces */
VFRES_NETHCTRL = VFRES_NQSETS, /* # of EQs used for ETH or CTRL Qs */
VFRES_NIQFLINT = VFRES_NQSETS+2,/* # of ingress Qs/w Free List(s)/intr */
VFRES_NIQ = 0, /* # of non-fl/int ingress queues */
VFRES_NEQ = VFRES_NQSETS*2, /* # of egress queues */
VFRES_TC = 0, /* PCI-E traffic class */
VFRES_NEXACTF = 16, /* # of exact MPS filters */
VFRES_R_CAPS = FW_CMD_CAP_DMAQ|FW_CMD_CAP_VF|FW_CMD_CAP_PORT,
VFRES_WX_CAPS = FW_CMD_CAP_DMAQ|FW_CMD_CAP_VF,
};
/*
* Provide a Port Access Rights Mask for the specified PF/VF. This is very
* static and likely not to be useful in the long run. We really need to
* implement some form of persistent configuration which the firmware
* controls.
*/
static unsigned int pfvfres_pmask(struct adapter *adapter,
unsigned int pf, unsigned int vf)
{
unsigned int portn, portvec;
/*
* Give PF's access to all of the ports.
*/
if (vf == 0)
return FW_PFVF_CMD_PMASK_MASK;
/*
* For VFs, we'll assign them access to the ports based purely on the
* PF. We assign active ports in order, wrapping around if there are
* fewer active ports than PFs: e.g. active port[pf % nports].
* Unfortunately the adapter's port_info structs haven't been
* initialized yet so we have to compute this.
*/
if (adapter->params.nports == 0)
return 0;
portn = pf % adapter->params.nports;
portvec = adapter->params.portvec;
for (;;) {
/*
* Isolate the lowest set bit in the port vector. If we're at
* the port number that we want, return that as the pmask.
* otherwise mask that bit out of the port vector and
* decrement our port number ...
*/
unsigned int pmask = portvec ^ (portvec & (portvec-1));
if (portn == 0)
return pmask;
portn--;
portvec &= ~pmask;
}
/*NOTREACHED*/
}
#endif
enum {
MEMWIN0_APERTURE = 65536,
MEMWIN0_BASE = 0x30000,
@ -2925,6 +2995,42 @@ static int adap_init0(struct adapter *adap)
t4_read_mtu_tbl(adap, adap->params.mtus, NULL);
t4_load_mtus(adap, adap->params.mtus, adap->params.a_wnd,
adap->params.b_wnd);
#ifdef CONFIG_PCI_IOV
/*
* Provision resource limits for Virtual Functions. We currently
* grant them all the same static resource limits except for the Port
* Access Rights Mask which we're assigning based on the PF. All of
* the static provisioning stuff for both the PF and VF really needs
* to be managed in a persistent manner for each device which the
* firmware controls.
*/
{
int pf, vf;
for (pf = 0; pf < ARRAY_SIZE(num_vf); pf++) {
if (num_vf[pf] <= 0)
continue;
/* VF numbering starts at 1! */
for (vf = 1; vf <= num_vf[pf]; vf++) {
ret = t4_cfg_pfvf(adap, 0, pf, vf,
VFRES_NEQ, VFRES_NETHCTRL,
VFRES_NIQFLINT, VFRES_NIQ,
VFRES_TC, VFRES_NVI,
FW_PFVF_CMD_CMASK_MASK,
pfvfres_pmask(adap, pf, vf),
VFRES_NEXACTF,
VFRES_R_CAPS, VFRES_WX_CAPS);
if (ret < 0)
dev_warn(adap->pdev_dev, "failed to "
"provision pf/vf=%d/%d; "
"err=%d\n", pf, vf, ret);
}
}
}
#endif
return 0;
/*