mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
![Kees Cook](/assets/img/avatar_default.png)
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc(). This patch replaces cases of: devm_kzalloc(handle, a * b, gfp) with: devm_kcalloc(handle, a * b, gfp) as well as handling cases of: devm_kzalloc(handle, a * b * c, gfp) with: devm_kzalloc(handle, array3_size(a, b, c), gfp) as it's slightly less ugly than: devm_kcalloc(handle, array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: devm_kzalloc(handle, 4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. Some manual whitespace fixes were needed in this patch, as Coccinelle really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...". The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ expression HANDLE; type TYPE; expression THING, E; @@ ( devm_kzalloc(HANDLE, - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | devm_kzalloc(HANDLE, - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression HANDLE; expression COUNT; typedef u8; typedef __u8; @@ ( devm_kzalloc(HANDLE, - sizeof(u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ expression HANDLE; type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ expression HANDLE; identifier SIZE, COUNT; @@ - devm_kzalloc + devm_kcalloc (HANDLE, - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression HANDLE; expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression HANDLE; expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ expression HANDLE; identifier STRIDE, SIZE, COUNT; @@ ( devm_kzalloc(HANDLE, - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression HANDLE; expression E1, E2, E3; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression HANDLE; expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, sizeof(THING) * C2, ...) | devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...) | devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, C1 * C2, ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * E2 + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * (E2) + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
372 lines
9.4 KiB
C
372 lines
9.4 KiB
C
/*
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* Universal Flash Storage Host controller Platform bus based glue driver
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*
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* This code is based on drivers/scsi/ufs/ufshcd-pltfrm.c
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* Copyright (C) 2011-2013 Samsung India Software Operations
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*
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* Authors:
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* Santosh Yaraganavi <santosh.sy@samsung.com>
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* Vinayak Holikatti <h.vinayak@samsung.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* See the COPYING file in the top-level directory or visit
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* <http://www.gnu.org/licenses/gpl-2.0.html>
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* This program is provided "AS IS" and "WITH ALL FAULTS" and
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* without warranty of any kind. You are solely responsible for
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* determining the appropriateness of using and distributing
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* the program and assume all risks associated with your exercise
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* of rights with respect to the program, including but not limited
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* to infringement of third party rights, the risks and costs of
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* program errors, damage to or loss of data, programs or equipment,
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* and unavailability or interruption of operations. Under no
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* circumstances will the contributor of this Program be liable for
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* any damages of any kind arising from your use or distribution of
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* this program.
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*/
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/of.h>
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#include "ufshcd.h"
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#include "ufshcd-pltfrm.h"
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#define UFSHCD_DEFAULT_LANES_PER_DIRECTION 2
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static int ufshcd_parse_clock_info(struct ufs_hba *hba)
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{
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int ret = 0;
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int cnt;
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int i;
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struct device *dev = hba->dev;
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struct device_node *np = dev->of_node;
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char *name;
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u32 *clkfreq = NULL;
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struct ufs_clk_info *clki;
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int len = 0;
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size_t sz = 0;
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if (!np)
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goto out;
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cnt = of_property_count_strings(np, "clock-names");
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if (!cnt || (cnt == -EINVAL)) {
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dev_info(dev, "%s: Unable to find clocks, assuming enabled\n",
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__func__);
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} else if (cnt < 0) {
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dev_err(dev, "%s: count clock strings failed, err %d\n",
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__func__, cnt);
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ret = cnt;
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}
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if (cnt <= 0)
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goto out;
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if (!of_get_property(np, "freq-table-hz", &len)) {
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dev_info(dev, "freq-table-hz property not specified\n");
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goto out;
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}
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if (len <= 0)
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goto out;
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sz = len / sizeof(*clkfreq);
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if (sz != 2 * cnt) {
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dev_err(dev, "%s len mismatch\n", "freq-table-hz");
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ret = -EINVAL;
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goto out;
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}
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clkfreq = devm_kcalloc(dev, sz, sizeof(*clkfreq),
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GFP_KERNEL);
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if (!clkfreq) {
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ret = -ENOMEM;
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goto out;
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}
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ret = of_property_read_u32_array(np, "freq-table-hz",
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clkfreq, sz);
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if (ret && (ret != -EINVAL)) {
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dev_err(dev, "%s: error reading array %d\n",
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"freq-table-hz", ret);
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return ret;
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}
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for (i = 0; i < sz; i += 2) {
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ret = of_property_read_string_index(np,
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"clock-names", i/2, (const char **)&name);
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if (ret)
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goto out;
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clki = devm_kzalloc(dev, sizeof(*clki), GFP_KERNEL);
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if (!clki) {
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ret = -ENOMEM;
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goto out;
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}
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clki->min_freq = clkfreq[i];
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clki->max_freq = clkfreq[i+1];
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clki->name = kstrdup(name, GFP_KERNEL);
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dev_dbg(dev, "%s: min %u max %u name %s\n", "freq-table-hz",
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clki->min_freq, clki->max_freq, clki->name);
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list_add_tail(&clki->list, &hba->clk_list_head);
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}
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out:
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return ret;
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}
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#define MAX_PROP_SIZE 32
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static int ufshcd_populate_vreg(struct device *dev, const char *name,
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struct ufs_vreg **out_vreg)
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{
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int ret = 0;
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char prop_name[MAX_PROP_SIZE];
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struct ufs_vreg *vreg = NULL;
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struct device_node *np = dev->of_node;
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if (!np) {
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dev_err(dev, "%s: non DT initialization\n", __func__);
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goto out;
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}
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snprintf(prop_name, MAX_PROP_SIZE, "%s-supply", name);
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if (!of_parse_phandle(np, prop_name, 0)) {
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dev_info(dev, "%s: Unable to find %s regulator, assuming enabled\n",
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__func__, prop_name);
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goto out;
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}
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vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);
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if (!vreg)
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return -ENOMEM;
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vreg->name = kstrdup(name, GFP_KERNEL);
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/* if fixed regulator no need further initialization */
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snprintf(prop_name, MAX_PROP_SIZE, "%s-fixed-regulator", name);
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if (of_property_read_bool(np, prop_name))
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goto out;
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snprintf(prop_name, MAX_PROP_SIZE, "%s-max-microamp", name);
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ret = of_property_read_u32(np, prop_name, &vreg->max_uA);
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if (ret) {
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dev_err(dev, "%s: unable to find %s err %d\n",
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__func__, prop_name, ret);
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goto out;
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}
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vreg->min_uA = 0;
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if (!strcmp(name, "vcc")) {
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if (of_property_read_bool(np, "vcc-supply-1p8")) {
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vreg->min_uV = UFS_VREG_VCC_1P8_MIN_UV;
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vreg->max_uV = UFS_VREG_VCC_1P8_MAX_UV;
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} else {
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vreg->min_uV = UFS_VREG_VCC_MIN_UV;
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vreg->max_uV = UFS_VREG_VCC_MAX_UV;
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}
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} else if (!strcmp(name, "vccq")) {
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vreg->min_uV = UFS_VREG_VCCQ_MIN_UV;
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vreg->max_uV = UFS_VREG_VCCQ_MAX_UV;
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} else if (!strcmp(name, "vccq2")) {
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vreg->min_uV = UFS_VREG_VCCQ2_MIN_UV;
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vreg->max_uV = UFS_VREG_VCCQ2_MAX_UV;
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}
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goto out;
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out:
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if (!ret)
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*out_vreg = vreg;
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return ret;
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}
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/**
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* ufshcd_parse_regulator_info - get regulator info from device tree
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* @hba: per adapter instance
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*
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* Get regulator info from device tree for vcc, vccq, vccq2 power supplies.
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* If any of the supplies are not defined it is assumed that they are always-on
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* and hence return zero. If the property is defined but parsing is failed
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* then return corresponding error.
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*/
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static int ufshcd_parse_regulator_info(struct ufs_hba *hba)
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{
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int err;
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struct device *dev = hba->dev;
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struct ufs_vreg_info *info = &hba->vreg_info;
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err = ufshcd_populate_vreg(dev, "vdd-hba", &info->vdd_hba);
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if (err)
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goto out;
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err = ufshcd_populate_vreg(dev, "vcc", &info->vcc);
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if (err)
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goto out;
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err = ufshcd_populate_vreg(dev, "vccq", &info->vccq);
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if (err)
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goto out;
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err = ufshcd_populate_vreg(dev, "vccq2", &info->vccq2);
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out:
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return err;
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}
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#ifdef CONFIG_PM
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/**
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* ufshcd_pltfrm_suspend - suspend power management function
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* @dev: pointer to device handle
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*
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* Returns 0 if successful
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* Returns non-zero otherwise
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*/
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int ufshcd_pltfrm_suspend(struct device *dev)
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{
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return ufshcd_system_suspend(dev_get_drvdata(dev));
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}
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_suspend);
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/**
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* ufshcd_pltfrm_resume - resume power management function
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* @dev: pointer to device handle
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*
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* Returns 0 if successful
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* Returns non-zero otherwise
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*/
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int ufshcd_pltfrm_resume(struct device *dev)
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{
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return ufshcd_system_resume(dev_get_drvdata(dev));
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}
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_resume);
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int ufshcd_pltfrm_runtime_suspend(struct device *dev)
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{
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return ufshcd_runtime_suspend(dev_get_drvdata(dev));
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}
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_suspend);
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int ufshcd_pltfrm_runtime_resume(struct device *dev)
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{
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return ufshcd_runtime_resume(dev_get_drvdata(dev));
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}
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_resume);
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int ufshcd_pltfrm_runtime_idle(struct device *dev)
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{
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return ufshcd_runtime_idle(dev_get_drvdata(dev));
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}
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_idle);
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#endif /* CONFIG_PM */
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void ufshcd_pltfrm_shutdown(struct platform_device *pdev)
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{
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ufshcd_shutdown((struct ufs_hba *)platform_get_drvdata(pdev));
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}
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_shutdown);
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static void ufshcd_init_lanes_per_dir(struct ufs_hba *hba)
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{
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struct device *dev = hba->dev;
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int ret;
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ret = of_property_read_u32(dev->of_node, "lanes-per-direction",
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&hba->lanes_per_direction);
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if (ret) {
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dev_dbg(hba->dev,
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"%s: failed to read lanes-per-direction, ret=%d\n",
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__func__, ret);
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hba->lanes_per_direction = UFSHCD_DEFAULT_LANES_PER_DIRECTION;
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}
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}
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/**
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* ufshcd_pltfrm_init - probe routine of the driver
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* @pdev: pointer to Platform device handle
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* @vops: pointer to variant ops
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*
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* Returns 0 on success, non-zero value on failure
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*/
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int ufshcd_pltfrm_init(struct platform_device *pdev,
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struct ufs_hba_variant_ops *vops)
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{
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struct ufs_hba *hba;
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void __iomem *mmio_base;
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struct resource *mem_res;
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int irq, err;
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struct device *dev = &pdev->dev;
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mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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mmio_base = devm_ioremap_resource(dev, mem_res);
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if (IS_ERR(mmio_base)) {
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err = PTR_ERR(mmio_base);
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goto out;
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}
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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dev_err(dev, "IRQ resource not available\n");
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err = -ENODEV;
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goto out;
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}
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err = ufshcd_alloc_host(dev, &hba);
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if (err) {
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dev_err(&pdev->dev, "Allocation failed\n");
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goto out;
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}
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hba->vops = vops;
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err = ufshcd_parse_clock_info(hba);
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if (err) {
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dev_err(&pdev->dev, "%s: clock parse failed %d\n",
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__func__, err);
|
|
goto dealloc_host;
|
|
}
|
|
err = ufshcd_parse_regulator_info(hba);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "%s: regulator init failed %d\n",
|
|
__func__, err);
|
|
goto dealloc_host;
|
|
}
|
|
|
|
pm_runtime_set_active(&pdev->dev);
|
|
pm_runtime_enable(&pdev->dev);
|
|
|
|
ufshcd_init_lanes_per_dir(hba);
|
|
|
|
err = ufshcd_init(hba, mmio_base, irq);
|
|
if (err) {
|
|
dev_err(dev, "Initialization failed\n");
|
|
goto out_disable_rpm;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, hba);
|
|
|
|
return 0;
|
|
|
|
out_disable_rpm:
|
|
pm_runtime_disable(&pdev->dev);
|
|
pm_runtime_set_suspended(&pdev->dev);
|
|
dealloc_host:
|
|
ufshcd_dealloc_host(hba);
|
|
out:
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ufshcd_pltfrm_init);
|
|
|
|
MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
|
|
MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");
|
|
MODULE_DESCRIPTION("UFS host controller Platform bus based glue driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(UFSHCD_DRIVER_VERSION);
|