diff options
Diffstat (limited to 'sys/dev/dpaa2/dpaa2_con.c')
| -rw-r--r-- | sys/dev/dpaa2/dpaa2_con.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/sys/dev/dpaa2/dpaa2_con.c b/sys/dev/dpaa2/dpaa2_con.c new file mode 100644 index 000000000000..602497c2c8de --- /dev/null +++ b/sys/dev/dpaa2/dpaa2_con.c @@ -0,0 +1,213 @@ +/*- + * 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); |