forked from Minki/linux
b27186abb3
- Sync dtc with upstream version v1.4.7-14-gc86da84d30e4 - Work to get rid of direct accesses to struct device_node name and type pointers in preparation for removing them. New helpers for parsing DT cpu nodes and conversions to use the helpers. printk conversions to %pOFn for printing DT node names. Most went thru subystem trees, so this is the remainder. - Fixes to DT child node lookups to actually be restricted to child nodes instead of treewide. - Refactoring of dtb targets out of arch code. This makes the support more uniform and enables building all dtbs on c6x, microblaze, and powerpc. - Various DT binding updates for Renesas r8a7744 SoC - Vendor prefixes for Facebook, OLPC - Restructuring of some ARM binding docs moving some peripheral bindings out of board/SoC binding files - New "secure-chosen" binding for secure world settings on ARM - Dual licensing of 2 DT IRQ binding headers -----BEGIN PGP SIGNATURE----- iQJEBAABCgAuFiEEktVUI4SxYhzZyEuo+vtdtY28YcMFAlvTKWYQHHJvYmhAa2Vy bmVsLm9yZwAKCRD6+121jbxhw8J5EACMAnrTxWQmXfQXOZEVxztcFavH6LP8mh2e 7FZIZ38jzHXXvl81tAg1nBhzFUU/qtvqW8NDCZ9OBxKvp6PFDNhWu241ZodSB1Kw MZWy2A9QC+qbHYCC+SB5gOT0+Py3v7LNCBa5/TxhbFd35THJM8X0FP7gmcCGX593 9Ml1rqawT4mK5XmCpczT0cXxyC4TgVtpfDWZH2KgJTR/kwXVQlOQOGZ8a1y/wrt7 8TLIe7Qy4SFRzjhwbSta1PUehyYfe4uTSsXIJ84kMvNMxinLXQtvd7t9TfsK8p/R WjYUneJskVjtxVrMQfdV4MxyFL1YEt2mYcr0PMKIWxMCgGDAZsHPoUZmjyh/PrCI uiZtEHn3fXpUZAV/xEHHNirJxYyQfHGiksAT+lPrUXYYLCcZ3ZmqiTEYhGoQAfH5 CQPMuxA6yXxp6bov6zJwZSTZtkXciju8aQRhUhlxIfHTqezmGYeql/bnWd+InNuR upANLZBh6D2jTWzDyobconkCCLlVkSqDoqOx725mMl6hIcdH9d2jVX7hwRf077VI 5i3CyPSJOkSOLSdB8bAPYfBoaDtH2bthxieUrkkSbIjbwHO1H6a2lxPeG/zah0a3 ePMGhi7J84UM4VpJEi000cP+bhPumJtJrG7zxP7ldXdfAF436sQ6KRptlcpLpj5i IwMhUQNH+g== =335v -----END PGP SIGNATURE----- Merge tag 'devicetree-for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull Devicetree updates from Rob Herring: "A bit bigger than normal as I've been busy this cycle. There's a few things with dependencies and a few things subsystem maintainers didn't pick up, so I'm taking them thru my tree. The fixes from Johan didn't get into linux-next, but they've been waiting for some time now and they are what's left of what subsystem maintainers didn't pick up. Summary: - Sync dtc with upstream version v1.4.7-14-gc86da84d30e4 - Work to get rid of direct accesses to struct device_node name and type pointers in preparation for removing them. New helpers for parsing DT cpu nodes and conversions to use the helpers. printk conversions to %pOFn for printing DT node names. Most went thru subystem trees, so this is the remainder. - Fixes to DT child node lookups to actually be restricted to child nodes instead of treewide. - Refactoring of dtb targets out of arch code. This makes the support more uniform and enables building all dtbs on c6x, microblaze, and powerpc. - Various DT binding updates for Renesas r8a7744 SoC - Vendor prefixes for Facebook, OLPC - Restructuring of some ARM binding docs moving some peripheral bindings out of board/SoC binding files - New "secure-chosen" binding for secure world settings on ARM - Dual licensing of 2 DT IRQ binding headers" * tag 'devicetree-for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (78 commits) ARM: dt: relicense two DT binding IRQ headers power: supply: twl4030-charger: fix OF sibling-node lookup NFC: nfcmrvl_uart: fix OF child-node lookup net: stmmac: dwmac-sun8i: fix OF child-node lookup net: bcmgenet: fix OF child-node lookup drm/msm: fix OF child-node lookup drm/mediatek: fix OF sibling-node lookup of: Add missing exports of node name compare functions dt-bindings: Add OLPC vendor prefix dt-bindings: misc: bk4: Add device tree binding for Liebherr's BK4 SPI bus dt-bindings: thermal: samsung: Add SPDX license identifier dt-bindings: clock: samsung: Add SPDX license identifiers dt-bindings: timer: ostm: Add R7S9210 support dt-bindings: phy: rcar-gen2: Add r8a7744 support dt-bindings: can: rcar_can: Add r8a7744 support dt-bindings: timer: renesas, cmt: Document r8a7744 CMT support dt-bindings: watchdog: renesas-wdt: Document r8a7744 support dt-bindings: thermal: rcar: Add device tree support for r8a7744 Documentation: dt: Add binding for /secure-chosen/stdout-path dt-bindings: arm: zte: Move sysctrl bindings to their own doc ...
962 lines
23 KiB
C
962 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Freescale Management Complex (MC) bus driver
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*
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* Copyright (C) 2014-2016 Freescale Semiconductor, Inc.
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* Author: German Rivera <German.Rivera@freescale.com>
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*
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*/
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#define pr_fmt(fmt) "fsl-mc: " fmt
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/of_address.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/limits.h>
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#include <linux/bitops.h>
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#include <linux/msi.h>
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#include <linux/dma-mapping.h>
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#include "fsl-mc-private.h"
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/**
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* Default DMA mask for devices on a fsl-mc bus
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*/
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#define FSL_MC_DEFAULT_DMA_MASK (~0ULL)
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/**
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* struct fsl_mc - Private data of a "fsl,qoriq-mc" platform device
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* @root_mc_bus_dev: fsl-mc device representing the root DPRC
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* @num_translation_ranges: number of entries in addr_translation_ranges
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* @translation_ranges: array of bus to system address translation ranges
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*/
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struct fsl_mc {
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struct fsl_mc_device *root_mc_bus_dev;
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u8 num_translation_ranges;
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struct fsl_mc_addr_translation_range *translation_ranges;
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};
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/**
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* struct fsl_mc_addr_translation_range - bus to system address translation
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* range
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* @mc_region_type: Type of MC region for the range being translated
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* @start_mc_offset: Start MC offset of the range being translated
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* @end_mc_offset: MC offset of the first byte after the range (last MC
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* offset of the range is end_mc_offset - 1)
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* @start_phys_addr: system physical address corresponding to start_mc_addr
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*/
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struct fsl_mc_addr_translation_range {
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enum dprc_region_type mc_region_type;
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u64 start_mc_offset;
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u64 end_mc_offset;
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phys_addr_t start_phys_addr;
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};
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/**
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* struct mc_version
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* @major: Major version number: incremented on API compatibility changes
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* @minor: Minor version number: incremented on API additions (that are
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* backward compatible); reset when major version is incremented
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* @revision: Internal revision number: incremented on implementation changes
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* and/or bug fixes that have no impact on API
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*/
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struct mc_version {
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u32 major;
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u32 minor;
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u32 revision;
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};
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/**
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* fsl_mc_bus_match - device to driver matching callback
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* @dev: the fsl-mc device to match against
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* @drv: the device driver to search for matching fsl-mc object type
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* structures
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*
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* Returns 1 on success, 0 otherwise.
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*/
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static int fsl_mc_bus_match(struct device *dev, struct device_driver *drv)
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{
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const struct fsl_mc_device_id *id;
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struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
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struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(drv);
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bool found = false;
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if (!mc_drv->match_id_table)
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goto out;
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/*
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* If the object is not 'plugged' don't match.
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* Only exception is the root DPRC, which is a special case.
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*/
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if ((mc_dev->obj_desc.state & FSL_MC_OBJ_STATE_PLUGGED) == 0 &&
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!fsl_mc_is_root_dprc(&mc_dev->dev))
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goto out;
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/*
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* Traverse the match_id table of the given driver, trying to find
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* a matching for the given device.
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*/
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for (id = mc_drv->match_id_table; id->vendor != 0x0; id++) {
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if (id->vendor == mc_dev->obj_desc.vendor &&
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strcmp(id->obj_type, mc_dev->obj_desc.type) == 0) {
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found = true;
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break;
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}
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}
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out:
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dev_dbg(dev, "%smatched\n", found ? "" : "not ");
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return found;
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}
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/**
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* fsl_mc_bus_uevent - callback invoked when a device is added
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*/
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static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
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{
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struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
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if (add_uevent_var(env, "MODALIAS=fsl-mc:v%08Xd%s",
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mc_dev->obj_desc.vendor,
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mc_dev->obj_desc.type))
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return -ENOMEM;
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return 0;
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}
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static int fsl_mc_dma_configure(struct device *dev)
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{
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struct device *dma_dev = dev;
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while (dev_is_fsl_mc(dma_dev))
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dma_dev = dma_dev->parent;
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return of_dma_configure(dev, dma_dev->of_node, 0);
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}
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static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
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return sprintf(buf, "fsl-mc:v%08Xd%s\n", mc_dev->obj_desc.vendor,
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mc_dev->obj_desc.type);
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}
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static DEVICE_ATTR_RO(modalias);
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static struct attribute *fsl_mc_dev_attrs[] = {
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&dev_attr_modalias.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(fsl_mc_dev);
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struct bus_type fsl_mc_bus_type = {
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.name = "fsl-mc",
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.match = fsl_mc_bus_match,
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.uevent = fsl_mc_bus_uevent,
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.dma_configure = fsl_mc_dma_configure,
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.dev_groups = fsl_mc_dev_groups,
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};
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EXPORT_SYMBOL_GPL(fsl_mc_bus_type);
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struct device_type fsl_mc_bus_dprc_type = {
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.name = "fsl_mc_bus_dprc"
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};
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struct device_type fsl_mc_bus_dpni_type = {
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.name = "fsl_mc_bus_dpni"
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};
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struct device_type fsl_mc_bus_dpio_type = {
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.name = "fsl_mc_bus_dpio"
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};
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struct device_type fsl_mc_bus_dpsw_type = {
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.name = "fsl_mc_bus_dpsw"
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};
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struct device_type fsl_mc_bus_dpbp_type = {
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.name = "fsl_mc_bus_dpbp"
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};
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struct device_type fsl_mc_bus_dpcon_type = {
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.name = "fsl_mc_bus_dpcon"
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};
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struct device_type fsl_mc_bus_dpmcp_type = {
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.name = "fsl_mc_bus_dpmcp"
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};
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struct device_type fsl_mc_bus_dpmac_type = {
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.name = "fsl_mc_bus_dpmac"
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};
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struct device_type fsl_mc_bus_dprtc_type = {
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.name = "fsl_mc_bus_dprtc"
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};
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struct device_type fsl_mc_bus_dpseci_type = {
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.name = "fsl_mc_bus_dpseci"
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};
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static struct device_type *fsl_mc_get_device_type(const char *type)
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{
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static const struct {
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struct device_type *dev_type;
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const char *type;
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} dev_types[] = {
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{ &fsl_mc_bus_dprc_type, "dprc" },
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{ &fsl_mc_bus_dpni_type, "dpni" },
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{ &fsl_mc_bus_dpio_type, "dpio" },
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{ &fsl_mc_bus_dpsw_type, "dpsw" },
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{ &fsl_mc_bus_dpbp_type, "dpbp" },
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{ &fsl_mc_bus_dpcon_type, "dpcon" },
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{ &fsl_mc_bus_dpmcp_type, "dpmcp" },
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{ &fsl_mc_bus_dpmac_type, "dpmac" },
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{ &fsl_mc_bus_dprtc_type, "dprtc" },
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{ &fsl_mc_bus_dpseci_type, "dpseci" },
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{ NULL, NULL }
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};
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int i;
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for (i = 0; dev_types[i].dev_type; i++)
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if (!strcmp(dev_types[i].type, type))
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return dev_types[i].dev_type;
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return NULL;
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}
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static int fsl_mc_driver_probe(struct device *dev)
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{
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struct fsl_mc_driver *mc_drv;
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struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
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int error;
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mc_drv = to_fsl_mc_driver(dev->driver);
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error = mc_drv->probe(mc_dev);
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if (error < 0) {
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if (error != -EPROBE_DEFER)
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dev_err(dev, "%s failed: %d\n", __func__, error);
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return error;
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}
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return 0;
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}
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static int fsl_mc_driver_remove(struct device *dev)
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{
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struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver);
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struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
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int error;
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error = mc_drv->remove(mc_dev);
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if (error < 0) {
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dev_err(dev, "%s failed: %d\n", __func__, error);
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return error;
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}
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return 0;
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}
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static void fsl_mc_driver_shutdown(struct device *dev)
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{
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struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver);
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struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
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mc_drv->shutdown(mc_dev);
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}
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/**
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* __fsl_mc_driver_register - registers a child device driver with the
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* MC bus
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*
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* This function is implicitly invoked from the registration function of
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* fsl_mc device drivers, which is generated by the
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* module_fsl_mc_driver() macro.
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*/
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int __fsl_mc_driver_register(struct fsl_mc_driver *mc_driver,
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struct module *owner)
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{
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int error;
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mc_driver->driver.owner = owner;
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mc_driver->driver.bus = &fsl_mc_bus_type;
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if (mc_driver->probe)
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mc_driver->driver.probe = fsl_mc_driver_probe;
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if (mc_driver->remove)
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mc_driver->driver.remove = fsl_mc_driver_remove;
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if (mc_driver->shutdown)
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mc_driver->driver.shutdown = fsl_mc_driver_shutdown;
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error = driver_register(&mc_driver->driver);
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if (error < 0) {
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pr_err("driver_register() failed for %s: %d\n",
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mc_driver->driver.name, error);
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return error;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(__fsl_mc_driver_register);
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/**
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* fsl_mc_driver_unregister - unregisters a device driver from the
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* MC bus
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*/
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void fsl_mc_driver_unregister(struct fsl_mc_driver *mc_driver)
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{
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driver_unregister(&mc_driver->driver);
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}
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EXPORT_SYMBOL_GPL(fsl_mc_driver_unregister);
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/**
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* mc_get_version() - Retrieves the Management Complex firmware
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* version information
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* @mc_io: Pointer to opaque I/O object
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* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
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* @mc_ver_info: Returned version information structure
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*
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* Return: '0' on Success; Error code otherwise.
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*/
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static int mc_get_version(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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struct mc_version *mc_ver_info)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dpmng_rsp_get_version *rsp_params;
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int err;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPMNG_CMDID_GET_VERSION,
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cmd_flags,
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0);
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/* send command to mc*/
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err = mc_send_command(mc_io, &cmd);
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if (err)
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return err;
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/* retrieve response parameters */
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rsp_params = (struct dpmng_rsp_get_version *)cmd.params;
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mc_ver_info->revision = le32_to_cpu(rsp_params->revision);
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mc_ver_info->major = le32_to_cpu(rsp_params->version_major);
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mc_ver_info->minor = le32_to_cpu(rsp_params->version_minor);
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return 0;
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}
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/**
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* fsl_mc_get_root_dprc - function to traverse to the root dprc
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*/
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static void fsl_mc_get_root_dprc(struct device *dev,
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struct device **root_dprc_dev)
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{
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if (!dev) {
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*root_dprc_dev = NULL;
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} else if (!dev_is_fsl_mc(dev)) {
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*root_dprc_dev = NULL;
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} else {
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*root_dprc_dev = dev;
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while (dev_is_fsl_mc((*root_dprc_dev)->parent))
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*root_dprc_dev = (*root_dprc_dev)->parent;
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}
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}
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static int get_dprc_attr(struct fsl_mc_io *mc_io,
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int container_id, struct dprc_attributes *attr)
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{
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u16 dprc_handle;
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int error;
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error = dprc_open(mc_io, 0, container_id, &dprc_handle);
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if (error < 0) {
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dev_err(mc_io->dev, "dprc_open() failed: %d\n", error);
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return error;
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}
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memset(attr, 0, sizeof(struct dprc_attributes));
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error = dprc_get_attributes(mc_io, 0, dprc_handle, attr);
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if (error < 0) {
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dev_err(mc_io->dev, "dprc_get_attributes() failed: %d\n",
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error);
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goto common_cleanup;
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}
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error = 0;
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|
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common_cleanup:
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(void)dprc_close(mc_io, 0, dprc_handle);
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return error;
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}
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|
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static int get_dprc_icid(struct fsl_mc_io *mc_io,
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int container_id, u16 *icid)
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{
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struct dprc_attributes attr;
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int error;
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|
|
error = get_dprc_attr(mc_io, container_id, &attr);
|
|
if (error == 0)
|
|
*icid = attr.icid;
|
|
|
|
return error;
|
|
}
|
|
|
|
static int translate_mc_addr(struct fsl_mc_device *mc_dev,
|
|
enum dprc_region_type mc_region_type,
|
|
u64 mc_offset, phys_addr_t *phys_addr)
|
|
{
|
|
int i;
|
|
struct device *root_dprc_dev;
|
|
struct fsl_mc *mc;
|
|
|
|
fsl_mc_get_root_dprc(&mc_dev->dev, &root_dprc_dev);
|
|
mc = dev_get_drvdata(root_dprc_dev->parent);
|
|
|
|
if (mc->num_translation_ranges == 0) {
|
|
/*
|
|
* Do identity mapping:
|
|
*/
|
|
*phys_addr = mc_offset;
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < mc->num_translation_ranges; i++) {
|
|
struct fsl_mc_addr_translation_range *range =
|
|
&mc->translation_ranges[i];
|
|
|
|
if (mc_region_type == range->mc_region_type &&
|
|
mc_offset >= range->start_mc_offset &&
|
|
mc_offset < range->end_mc_offset) {
|
|
*phys_addr = range->start_phys_addr +
|
|
(mc_offset - range->start_mc_offset);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -EFAULT;
|
|
}
|
|
|
|
static int fsl_mc_device_get_mmio_regions(struct fsl_mc_device *mc_dev,
|
|
struct fsl_mc_device *mc_bus_dev)
|
|
{
|
|
int i;
|
|
int error;
|
|
struct resource *regions;
|
|
struct fsl_mc_obj_desc *obj_desc = &mc_dev->obj_desc;
|
|
struct device *parent_dev = mc_dev->dev.parent;
|
|
enum dprc_region_type mc_region_type;
|
|
|
|
if (is_fsl_mc_bus_dprc(mc_dev) ||
|
|
is_fsl_mc_bus_dpmcp(mc_dev)) {
|
|
mc_region_type = DPRC_REGION_TYPE_MC_PORTAL;
|
|
} else if (is_fsl_mc_bus_dpio(mc_dev)) {
|
|
mc_region_type = DPRC_REGION_TYPE_QBMAN_PORTAL;
|
|
} else {
|
|
/*
|
|
* This function should not have been called for this MC object
|
|
* type, as this object type is not supposed to have MMIO
|
|
* regions
|
|
*/
|
|
return -EINVAL;
|
|
}
|
|
|
|
regions = kmalloc_array(obj_desc->region_count,
|
|
sizeof(regions[0]), GFP_KERNEL);
|
|
if (!regions)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < obj_desc->region_count; i++) {
|
|
struct dprc_region_desc region_desc;
|
|
|
|
error = dprc_get_obj_region(mc_bus_dev->mc_io,
|
|
0,
|
|
mc_bus_dev->mc_handle,
|
|
obj_desc->type,
|
|
obj_desc->id, i, ®ion_desc);
|
|
if (error < 0) {
|
|
dev_err(parent_dev,
|
|
"dprc_get_obj_region() failed: %d\n", error);
|
|
goto error_cleanup_regions;
|
|
}
|
|
|
|
error = translate_mc_addr(mc_dev, mc_region_type,
|
|
region_desc.base_offset,
|
|
®ions[i].start);
|
|
if (error < 0) {
|
|
dev_err(parent_dev,
|
|
"Invalid MC offset: %#x (for %s.%d\'s region %d)\n",
|
|
region_desc.base_offset,
|
|
obj_desc->type, obj_desc->id, i);
|
|
goto error_cleanup_regions;
|
|
}
|
|
|
|
regions[i].end = regions[i].start + region_desc.size - 1;
|
|
regions[i].name = "fsl-mc object MMIO region";
|
|
regions[i].flags = IORESOURCE_IO;
|
|
if (region_desc.flags & DPRC_REGION_CACHEABLE)
|
|
regions[i].flags |= IORESOURCE_CACHEABLE;
|
|
}
|
|
|
|
mc_dev->regions = regions;
|
|
return 0;
|
|
|
|
error_cleanup_regions:
|
|
kfree(regions);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* fsl_mc_is_root_dprc - function to check if a given device is a root dprc
|
|
*/
|
|
bool fsl_mc_is_root_dprc(struct device *dev)
|
|
{
|
|
struct device *root_dprc_dev;
|
|
|
|
fsl_mc_get_root_dprc(dev, &root_dprc_dev);
|
|
if (!root_dprc_dev)
|
|
return false;
|
|
return dev == root_dprc_dev;
|
|
}
|
|
|
|
static void fsl_mc_device_release(struct device *dev)
|
|
{
|
|
struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
|
|
|
|
kfree(mc_dev->regions);
|
|
|
|
if (is_fsl_mc_bus_dprc(mc_dev))
|
|
kfree(to_fsl_mc_bus(mc_dev));
|
|
else
|
|
kfree(mc_dev);
|
|
}
|
|
|
|
/**
|
|
* Add a newly discovered fsl-mc device to be visible in Linux
|
|
*/
|
|
int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc,
|
|
struct fsl_mc_io *mc_io,
|
|
struct device *parent_dev,
|
|
struct fsl_mc_device **new_mc_dev)
|
|
{
|
|
int error;
|
|
struct fsl_mc_device *mc_dev = NULL;
|
|
struct fsl_mc_bus *mc_bus = NULL;
|
|
struct fsl_mc_device *parent_mc_dev;
|
|
|
|
if (dev_is_fsl_mc(parent_dev))
|
|
parent_mc_dev = to_fsl_mc_device(parent_dev);
|
|
else
|
|
parent_mc_dev = NULL;
|
|
|
|
if (strcmp(obj_desc->type, "dprc") == 0) {
|
|
/*
|
|
* Allocate an MC bus device object:
|
|
*/
|
|
mc_bus = kzalloc(sizeof(*mc_bus), GFP_KERNEL);
|
|
if (!mc_bus)
|
|
return -ENOMEM;
|
|
|
|
mc_dev = &mc_bus->mc_dev;
|
|
} else {
|
|
/*
|
|
* Allocate a regular fsl_mc_device object:
|
|
*/
|
|
mc_dev = kzalloc(sizeof(*mc_dev), GFP_KERNEL);
|
|
if (!mc_dev)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mc_dev->obj_desc = *obj_desc;
|
|
mc_dev->mc_io = mc_io;
|
|
device_initialize(&mc_dev->dev);
|
|
mc_dev->dev.parent = parent_dev;
|
|
mc_dev->dev.bus = &fsl_mc_bus_type;
|
|
mc_dev->dev.release = fsl_mc_device_release;
|
|
mc_dev->dev.type = fsl_mc_get_device_type(obj_desc->type);
|
|
if (!mc_dev->dev.type) {
|
|
error = -ENODEV;
|
|
dev_err(parent_dev, "unknown device type %s\n", obj_desc->type);
|
|
goto error_cleanup_dev;
|
|
}
|
|
dev_set_name(&mc_dev->dev, "%s.%d", obj_desc->type, obj_desc->id);
|
|
|
|
if (strcmp(obj_desc->type, "dprc") == 0) {
|
|
struct fsl_mc_io *mc_io2;
|
|
|
|
mc_dev->flags |= FSL_MC_IS_DPRC;
|
|
|
|
/*
|
|
* To get the DPRC's ICID, we need to open the DPRC
|
|
* in get_dprc_icid(). For child DPRCs, we do so using the
|
|
* parent DPRC's MC portal instead of the child DPRC's MC
|
|
* portal, in case the child DPRC is already opened with
|
|
* its own portal (e.g., the DPRC used by AIOP).
|
|
*
|
|
* NOTE: There cannot be more than one active open for a
|
|
* given MC object, using the same MC portal.
|
|
*/
|
|
if (parent_mc_dev) {
|
|
/*
|
|
* device being added is a child DPRC device
|
|
*/
|
|
mc_io2 = parent_mc_dev->mc_io;
|
|
} else {
|
|
/*
|
|
* device being added is the root DPRC device
|
|
*/
|
|
if (!mc_io) {
|
|
error = -EINVAL;
|
|
goto error_cleanup_dev;
|
|
}
|
|
|
|
mc_io2 = mc_io;
|
|
}
|
|
|
|
error = get_dprc_icid(mc_io2, obj_desc->id, &mc_dev->icid);
|
|
if (error < 0)
|
|
goto error_cleanup_dev;
|
|
} else {
|
|
/*
|
|
* A non-DPRC object has to be a child of a DPRC, use the
|
|
* parent's ICID and interrupt domain.
|
|
*/
|
|
mc_dev->icid = parent_mc_dev->icid;
|
|
mc_dev->dma_mask = FSL_MC_DEFAULT_DMA_MASK;
|
|
mc_dev->dev.dma_mask = &mc_dev->dma_mask;
|
|
mc_dev->dev.coherent_dma_mask = mc_dev->dma_mask;
|
|
dev_set_msi_domain(&mc_dev->dev,
|
|
dev_get_msi_domain(&parent_mc_dev->dev));
|
|
}
|
|
|
|
/*
|
|
* Get MMIO regions for the device from the MC:
|
|
*
|
|
* NOTE: the root DPRC is a special case as its MMIO region is
|
|
* obtained from the device tree
|
|
*/
|
|
if (parent_mc_dev && obj_desc->region_count != 0) {
|
|
error = fsl_mc_device_get_mmio_regions(mc_dev,
|
|
parent_mc_dev);
|
|
if (error < 0)
|
|
goto error_cleanup_dev;
|
|
}
|
|
|
|
/*
|
|
* The device-specific probe callback will get invoked by device_add()
|
|
*/
|
|
error = device_add(&mc_dev->dev);
|
|
if (error < 0) {
|
|
dev_err(parent_dev,
|
|
"device_add() failed for device %s: %d\n",
|
|
dev_name(&mc_dev->dev), error);
|
|
goto error_cleanup_dev;
|
|
}
|
|
|
|
dev_dbg(parent_dev, "added %s\n", dev_name(&mc_dev->dev));
|
|
|
|
*new_mc_dev = mc_dev;
|
|
return 0;
|
|
|
|
error_cleanup_dev:
|
|
kfree(mc_dev->regions);
|
|
kfree(mc_bus);
|
|
kfree(mc_dev);
|
|
|
|
return error;
|
|
}
|
|
EXPORT_SYMBOL_GPL(fsl_mc_device_add);
|
|
|
|
/**
|
|
* fsl_mc_device_remove - Remove an fsl-mc device from being visible to
|
|
* Linux
|
|
*
|
|
* @mc_dev: Pointer to an fsl-mc device
|
|
*/
|
|
void fsl_mc_device_remove(struct fsl_mc_device *mc_dev)
|
|
{
|
|
/*
|
|
* The device-specific remove callback will get invoked by device_del()
|
|
*/
|
|
device_del(&mc_dev->dev);
|
|
put_device(&mc_dev->dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(fsl_mc_device_remove);
|
|
|
|
static int parse_mc_ranges(struct device *dev,
|
|
int *paddr_cells,
|
|
int *mc_addr_cells,
|
|
int *mc_size_cells,
|
|
const __be32 **ranges_start)
|
|
{
|
|
const __be32 *prop;
|
|
int range_tuple_cell_count;
|
|
int ranges_len;
|
|
int tuple_len;
|
|
struct device_node *mc_node = dev->of_node;
|
|
|
|
*ranges_start = of_get_property(mc_node, "ranges", &ranges_len);
|
|
if (!(*ranges_start) || !ranges_len) {
|
|
dev_warn(dev,
|
|
"missing or empty ranges property for device tree node '%pOFn'\n",
|
|
mc_node);
|
|
return 0;
|
|
}
|
|
|
|
*paddr_cells = of_n_addr_cells(mc_node);
|
|
|
|
prop = of_get_property(mc_node, "#address-cells", NULL);
|
|
if (prop)
|
|
*mc_addr_cells = be32_to_cpup(prop);
|
|
else
|
|
*mc_addr_cells = *paddr_cells;
|
|
|
|
prop = of_get_property(mc_node, "#size-cells", NULL);
|
|
if (prop)
|
|
*mc_size_cells = be32_to_cpup(prop);
|
|
else
|
|
*mc_size_cells = of_n_size_cells(mc_node);
|
|
|
|
range_tuple_cell_count = *paddr_cells + *mc_addr_cells +
|
|
*mc_size_cells;
|
|
|
|
tuple_len = range_tuple_cell_count * sizeof(__be32);
|
|
if (ranges_len % tuple_len != 0) {
|
|
dev_err(dev, "malformed ranges property '%pOFn'\n", mc_node);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return ranges_len / tuple_len;
|
|
}
|
|
|
|
static int get_mc_addr_translation_ranges(struct device *dev,
|
|
struct fsl_mc_addr_translation_range
|
|
**ranges,
|
|
u8 *num_ranges)
|
|
{
|
|
int ret;
|
|
int paddr_cells;
|
|
int mc_addr_cells;
|
|
int mc_size_cells;
|
|
int i;
|
|
const __be32 *ranges_start;
|
|
const __be32 *cell;
|
|
|
|
ret = parse_mc_ranges(dev,
|
|
&paddr_cells,
|
|
&mc_addr_cells,
|
|
&mc_size_cells,
|
|
&ranges_start);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*num_ranges = ret;
|
|
if (!ret) {
|
|
/*
|
|
* Missing or empty ranges property ("ranges;") for the
|
|
* 'fsl,qoriq-mc' node. In this case, identity mapping
|
|
* will be used.
|
|
*/
|
|
*ranges = NULL;
|
|
return 0;
|
|
}
|
|
|
|
*ranges = devm_kcalloc(dev, *num_ranges,
|
|
sizeof(struct fsl_mc_addr_translation_range),
|
|
GFP_KERNEL);
|
|
if (!(*ranges))
|
|
return -ENOMEM;
|
|
|
|
cell = ranges_start;
|
|
for (i = 0; i < *num_ranges; ++i) {
|
|
struct fsl_mc_addr_translation_range *range = &(*ranges)[i];
|
|
|
|
range->mc_region_type = of_read_number(cell, 1);
|
|
range->start_mc_offset = of_read_number(cell + 1,
|
|
mc_addr_cells - 1);
|
|
cell += mc_addr_cells;
|
|
range->start_phys_addr = of_read_number(cell, paddr_cells);
|
|
cell += paddr_cells;
|
|
range->end_mc_offset = range->start_mc_offset +
|
|
of_read_number(cell, mc_size_cells);
|
|
|
|
cell += mc_size_cells;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fsl_mc_bus_probe - callback invoked when the root MC bus is being
|
|
* added
|
|
*/
|
|
static int fsl_mc_bus_probe(struct platform_device *pdev)
|
|
{
|
|
struct fsl_mc_obj_desc obj_desc;
|
|
int error;
|
|
struct fsl_mc *mc;
|
|
struct fsl_mc_device *mc_bus_dev = NULL;
|
|
struct fsl_mc_io *mc_io = NULL;
|
|
int container_id;
|
|
phys_addr_t mc_portal_phys_addr;
|
|
u32 mc_portal_size;
|
|
struct mc_version mc_version;
|
|
struct resource res;
|
|
|
|
mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
|
|
if (!mc)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, mc);
|
|
|
|
/*
|
|
* Get physical address of MC portal for the root DPRC:
|
|
*/
|
|
error = of_address_to_resource(pdev->dev.of_node, 0, &res);
|
|
if (error < 0) {
|
|
dev_err(&pdev->dev,
|
|
"of_address_to_resource() failed for %pOF\n",
|
|
pdev->dev.of_node);
|
|
return error;
|
|
}
|
|
|
|
mc_portal_phys_addr = res.start;
|
|
mc_portal_size = resource_size(&res);
|
|
error = fsl_create_mc_io(&pdev->dev, mc_portal_phys_addr,
|
|
mc_portal_size, NULL,
|
|
FSL_MC_IO_ATOMIC_CONTEXT_PORTAL, &mc_io);
|
|
if (error < 0)
|
|
return error;
|
|
|
|
error = mc_get_version(mc_io, 0, &mc_version);
|
|
if (error != 0) {
|
|
dev_err(&pdev->dev,
|
|
"mc_get_version() failed with error %d\n", error);
|
|
goto error_cleanup_mc_io;
|
|
}
|
|
|
|
dev_info(&pdev->dev, "MC firmware version: %u.%u.%u\n",
|
|
mc_version.major, mc_version.minor, mc_version.revision);
|
|
|
|
error = get_mc_addr_translation_ranges(&pdev->dev,
|
|
&mc->translation_ranges,
|
|
&mc->num_translation_ranges);
|
|
if (error < 0)
|
|
goto error_cleanup_mc_io;
|
|
|
|
error = dprc_get_container_id(mc_io, 0, &container_id);
|
|
if (error < 0) {
|
|
dev_err(&pdev->dev,
|
|
"dprc_get_container_id() failed: %d\n", error);
|
|
goto error_cleanup_mc_io;
|
|
}
|
|
|
|
memset(&obj_desc, 0, sizeof(struct fsl_mc_obj_desc));
|
|
error = dprc_get_api_version(mc_io, 0,
|
|
&obj_desc.ver_major,
|
|
&obj_desc.ver_minor);
|
|
if (error < 0)
|
|
goto error_cleanup_mc_io;
|
|
|
|
obj_desc.vendor = FSL_MC_VENDOR_FREESCALE;
|
|
strcpy(obj_desc.type, "dprc");
|
|
obj_desc.id = container_id;
|
|
obj_desc.irq_count = 1;
|
|
obj_desc.region_count = 0;
|
|
|
|
error = fsl_mc_device_add(&obj_desc, mc_io, &pdev->dev, &mc_bus_dev);
|
|
if (error < 0)
|
|
goto error_cleanup_mc_io;
|
|
|
|
mc->root_mc_bus_dev = mc_bus_dev;
|
|
return 0;
|
|
|
|
error_cleanup_mc_io:
|
|
fsl_destroy_mc_io(mc_io);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* fsl_mc_bus_remove - callback invoked when the root MC bus is being
|
|
* removed
|
|
*/
|
|
static int fsl_mc_bus_remove(struct platform_device *pdev)
|
|
{
|
|
struct fsl_mc *mc = platform_get_drvdata(pdev);
|
|
|
|
if (!fsl_mc_is_root_dprc(&mc->root_mc_bus_dev->dev))
|
|
return -EINVAL;
|
|
|
|
fsl_mc_device_remove(mc->root_mc_bus_dev);
|
|
|
|
fsl_destroy_mc_io(mc->root_mc_bus_dev->mc_io);
|
|
mc->root_mc_bus_dev->mc_io = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id fsl_mc_bus_match_table[] = {
|
|
{.compatible = "fsl,qoriq-mc",},
|
|
{},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, fsl_mc_bus_match_table);
|
|
|
|
static struct platform_driver fsl_mc_bus_driver = {
|
|
.driver = {
|
|
.name = "fsl_mc_bus",
|
|
.pm = NULL,
|
|
.of_match_table = fsl_mc_bus_match_table,
|
|
},
|
|
.probe = fsl_mc_bus_probe,
|
|
.remove = fsl_mc_bus_remove,
|
|
};
|
|
|
|
static int __init fsl_mc_bus_driver_init(void)
|
|
{
|
|
int error;
|
|
|
|
error = bus_register(&fsl_mc_bus_type);
|
|
if (error < 0) {
|
|
pr_err("bus type registration failed: %d\n", error);
|
|
goto error_cleanup_cache;
|
|
}
|
|
|
|
error = platform_driver_register(&fsl_mc_bus_driver);
|
|
if (error < 0) {
|
|
pr_err("platform_driver_register() failed: %d\n", error);
|
|
goto error_cleanup_bus;
|
|
}
|
|
|
|
error = dprc_driver_init();
|
|
if (error < 0)
|
|
goto error_cleanup_driver;
|
|
|
|
error = fsl_mc_allocator_driver_init();
|
|
if (error < 0)
|
|
goto error_cleanup_dprc_driver;
|
|
|
|
return 0;
|
|
|
|
error_cleanup_dprc_driver:
|
|
dprc_driver_exit();
|
|
|
|
error_cleanup_driver:
|
|
platform_driver_unregister(&fsl_mc_bus_driver);
|
|
|
|
error_cleanup_bus:
|
|
bus_unregister(&fsl_mc_bus_type);
|
|
|
|
error_cleanup_cache:
|
|
return error;
|
|
}
|
|
postcore_initcall(fsl_mc_bus_driver_init);
|