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sys/dev/dpaa2/dpaa2_con.c
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/*- | |||||
* SPDX-License-Identifier: BSD-2-Clause | |||||
* | |||||
* Copyright © 2021-2022 Dmitry Salychev | |||||
* | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions | |||||
* are met: | |||||
* 1. Redistributions of source code must retain the above copyright | |||||
* notice, this list of conditions and the following disclaimer. | |||||
* 2. Redistributions in binary form must reproduce the above copyright | |||||
* notice, this list of conditions and the following disclaimer in the | |||||
* documentation and/or other materials provided with the distribution. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||||
* SUCH DAMAGE. | |||||
*/ | |||||
#include <sys/cdefs.h> | |||||
__FBSDID("$FreeBSD$"); | |||||
/* | |||||
* The DPAA2 Concentrator (DPCON) driver. | |||||
* | |||||
* Supports configuration of QBMan channels for advanced scheduling of ingress | |||||
* packets from one or more network interfaces. | |||||
* | |||||
* DPCONs are used to distribute Rx or Tx Confirmation traffic to different | |||||
* cores, via affine DPIO objects. The implication is that one DPCON must be | |||||
* available for each core where Rx or Tx Confirmation traffic should be | |||||
* distributed to. | |||||
* | |||||
* QBMan channel contains several work queues. The WQs within a channel have a | |||||
* priority relative to each other. Each channel consists of either eight or two | |||||
* WQs, and thus, there are either eight or two possible priorities in a channel. | |||||
*/ | |||||
#include <sys/param.h> | |||||
#include <sys/kernel.h> | |||||
#include <sys/bus.h> | |||||
#include <sys/rman.h> | |||||
#include <sys/module.h> | |||||
#include <sys/malloc.h> | |||||
#include <sys/mutex.h> | |||||
#include <vm/vm.h> | |||||
#include <machine/bus.h> | |||||
#include <machine/resource.h> | |||||
#include <dev/pci/pcivar.h> | |||||
#include "pcib_if.h" | |||||
#include "pci_if.h" | |||||
#include "dpaa2_mcp.h" | |||||
#include "dpaa2_swp.h" | |||||
#include "dpaa2_mc.h" | |||||
#include "dpaa2_cmd_if.h" | |||||
/* DPAA2 Concentrator resource specification. */ | |||||
struct resource_spec dpaa2_con_spec[] = { | |||||
/* | |||||
* DPMCP resources. | |||||
* | |||||
* NOTE: MC command portals (MCPs) are used to send commands to, and | |||||
* receive responses from, the MC firmware. One portal per DPCON. | |||||
*/ | |||||
#define MCP_RES_NUM (1u) | |||||
#define MCP_RID_OFF (0u) | |||||
#define MCP_RID(rid) ((rid) + MCP_RID_OFF) | |||||
/* --- */ | |||||
{ DPAA2_DEV_MCP, MCP_RID(0), RF_ACTIVE | RF_SHAREABLE | RF_OPTIONAL }, | |||||
/* --- */ | |||||
RESOURCE_SPEC_END | |||||
}; | |||||
static int dpaa2_con_detach(device_t dev); | |||||
/* | |||||
* Device interface. | |||||
*/ | |||||
static int | |||||
dpaa2_con_probe(device_t dev) | |||||
{ | |||||
/* DPCON device will be added by a parent resource container itself. */ | |||||
device_set_desc(dev, "DPAA2 Concentrator"); | |||||
return (BUS_PROBE_DEFAULT); | |||||
} | |||||
static int | |||||
dpaa2_con_detach(device_t dev) | |||||
{ | |||||
device_t child = dev; | |||||
struct dpaa2_con_softc *sc = device_get_softc(dev); | |||||
DPAA2_CMD_CON_CLOSE(dev, child, dpaa2_mcp_tk(sc->cmd, sc->con_token)); | |||||
DPAA2_CMD_RC_CLOSE(dev, child, dpaa2_mcp_tk(sc->cmd, sc->rc_token)); | |||||
dpaa2_mcp_free_command(sc->cmd); | |||||
sc->cmd = NULL; | |||||
sc->con_token = 0; | |||||
sc->rc_token = 0; | |||||
return (0); | |||||
} | |||||
static int | |||||
dpaa2_con_attach(device_t dev) | |||||
{ | |||||
device_t pdev = device_get_parent(dev); | |||||
device_t child = dev; | |||||
device_t mcp_dev; | |||||
struct dpaa2_con_softc *sc = device_get_softc(dev); | |||||
struct dpaa2_devinfo *rcinfo = device_get_ivars(pdev); | |||||
struct dpaa2_devinfo *dinfo = device_get_ivars(dev); | |||||
struct dpaa2_devinfo *mcp_dinfo; | |||||
int error; | |||||
sc->dev = dev; | |||||
error = bus_alloc_resources(sc->dev, dpaa2_con_spec, sc->res); | |||||
if (error) { | |||||
device_printf(dev, "%s: failed to allocate resources: " | |||||
"error=%d\n", __func__, error); | |||||
return (ENXIO); | |||||
} | |||||
/* Obtain MC portal. */ | |||||
mcp_dev = (device_t) rman_get_start(sc->res[MCP_RID(0)]); | |||||
mcp_dinfo = device_get_ivars(mcp_dev); | |||||
dinfo->portal = mcp_dinfo->portal; | |||||
/* Allocate a command to send to MC hardware. */ | |||||
error = dpaa2_mcp_init_command(&sc->cmd, DPAA2_CMD_DEF); | |||||
if (error) { | |||||
device_printf(dev, "Failed to allocate dpaa2_cmd: error=%d\n", | |||||
error); | |||||
goto err_exit; | |||||
} | |||||
/* Open resource container and DPCON object. */ | |||||
error = DPAA2_CMD_RC_OPEN(dev, child, sc->cmd, rcinfo->id, | |||||
&sc->rc_token); | |||||
if (error) { | |||||
device_printf(dev, "Failed to open DPRC: error=%d\n", error); | |||||
goto err_free_cmd; | |||||
} | |||||
error = DPAA2_CMD_CON_OPEN(dev, child, sc->cmd, dinfo->id, | |||||
&sc->con_token); | |||||
if (error) { | |||||
device_printf(dev, "Failed to open DPCON: id=%d, error=%d\n", | |||||
dinfo->id, error); | |||||
goto err_close_rc; | |||||
} | |||||
/* Prepare DPCON object. */ | |||||
error = DPAA2_CMD_CON_RESET(dev, child, sc->cmd); | |||||
if (error) { | |||||
device_printf(dev, "Failed to reset DPCON: id=%d, error=%d\n", | |||||
dinfo->id, error); | |||||
goto err_close_con; | |||||
} | |||||
error = DPAA2_CMD_CON_GET_ATTRIBUTES(dev, child, sc->cmd, &sc->attr); | |||||
if (error) { | |||||
device_printf(dev, "Failed to get DPCON attributes: id=%d, " | |||||
"error=%d\n", dinfo->id, error); | |||||
goto err_close_con; | |||||
} | |||||
/* TODO: Enable debug output via sysctl (to reduce output). */ | |||||
if (bootverbose) | |||||
device_printf(dev, "chan_id=%d, priorities=%d\n", | |||||
sc->attr.chan_id, sc->attr.prior_num); | |||||
return (0); | |||||
err_close_con: | |||||
DPAA2_CMD_CON_CLOSE(dev, child, dpaa2_mcp_tk(sc->cmd, sc->con_token)); | |||||
err_close_rc: | |||||
DPAA2_CMD_RC_CLOSE(dev, child, dpaa2_mcp_tk(sc->cmd, sc->rc_token)); | |||||
err_free_cmd: | |||||
dpaa2_mcp_free_command(sc->cmd); | |||||
err_exit: | |||||
return (ENXIO); | |||||
} | |||||
static device_method_t dpaa2_con_methods[] = { | |||||
/* Device interface */ | |||||
DEVMETHOD(device_probe, dpaa2_con_probe), | |||||
DEVMETHOD(device_attach, dpaa2_con_attach), | |||||
DEVMETHOD(device_detach, dpaa2_con_detach), | |||||
DEVMETHOD_END | |||||
}; | |||||
static driver_t dpaa2_con_driver = { | |||||
"dpaa2_con", | |||||
dpaa2_con_methods, | |||||
sizeof(struct dpaa2_con_softc), | |||||
}; | |||||
DRIVER_MODULE(dpaa2_con, dpaa2_rc, dpaa2_con_driver, 0, 0); |