diff options
Diffstat (limited to 'drivers/misc')
28 files changed, 2215 insertions, 519 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 64971baf11fa..c290990d73ed 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -474,11 +474,15 @@ config SRAM bool "Generic on-chip SRAM driver" depends on HAS_IOMEM select GENERIC_ALLOCATOR + select SRAM_EXEC if ARM help This driver allows you to declare a memory region to be managed by the genalloc API. It is supposed to be used for small on-chip SRAM areas found on many SoCs. +config SRAM_EXEC + bool + config VEXPRESS_SYSCFG bool "Versatile Express System Configuration driver" depends on VEXPRESS_CONFIG @@ -487,6 +491,7 @@ config VEXPRESS_SYSCFG ARM Ltd. Versatile Express uses specialised platform configuration bus. System Configuration interface is one of the possible means of generating transactions on this bus. + config PANEL tristate "Parallel port LCD/Keypad Panel support" depends on PARPORT @@ -494,14 +499,14 @@ config PANEL Say Y here if you have an HD44780 or KS-0074 LCD connected to your parallel port. This driver also features 4 and 6-key keypads. The LCD is accessible through the /dev/lcd char device (10, 156), and the - keypad through /dev/keypad (10, 185). Both require misc device to be - enabled. This code can either be compiled as a module, or linked into - the kernel and started at boot. If you don't understand what all this - is about, say N. + keypad through /dev/keypad (10, 185). This code can either be + compiled as a module, or linked into the kernel and started at boot. + If you don't understand what all this is about, say N. + +if PANEL config PANEL_PARPORT int "Default parallel port number (0=LPT1)" - depends on PANEL range 0 255 default "0" ---help--- @@ -513,7 +518,6 @@ config PANEL_PARPORT config PANEL_PROFILE int "Default panel profile (0-5, 0=custom)" - depends on PANEL range 0 5 default "5" ---help--- @@ -534,7 +538,7 @@ config PANEL_PROFILE for experts. config PANEL_KEYPAD - depends on PANEL && PANEL_PROFILE="0" + depends on PANEL_PROFILE="0" int "Keypad type (0=none, 1=old 6 keys, 2=new 6 keys, 3=Nexcom 4 keys)" range 0 3 default 0 @@ -551,7 +555,7 @@ config PANEL_KEYPAD supports simultaneous keys pressed when the keypad supports them. config PANEL_LCD - depends on PANEL && PANEL_PROFILE="0" + depends on PANEL_PROFILE="0" int "LCD type (0=none, 1=custom, 2=old //, 3=ks0074, 4=hantronix, 5=Nexcom)" range 0 5 default 0 @@ -574,7 +578,7 @@ config PANEL_LCD that those values changed from the 2.4 driver for better consistency. config PANEL_LCD_HEIGHT - depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" + depends on PANEL_PROFILE="0" && PANEL_LCD="1" int "Number of lines on the LCD (1-2)" range 1 2 default 2 @@ -583,7 +587,7 @@ config PANEL_LCD_HEIGHT It can either be 1 or 2. config PANEL_LCD_WIDTH - depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" + depends on PANEL_PROFILE="0" && PANEL_LCD="1" int "Number of characters per line on the LCD (1-40)" range 1 40 default 40 @@ -592,7 +596,7 @@ config PANEL_LCD_WIDTH Common values are 16,20,24,40. config PANEL_LCD_BWIDTH - depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" + depends on PANEL_PROFILE="0" && PANEL_LCD="1" int "Internal LCD line width (1-40, 40 by default)" range 1 40 default 40 @@ -608,7 +612,7 @@ config PANEL_LCD_BWIDTH If you don't know, put '40' here. config PANEL_LCD_HWIDTH - depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" + depends on PANEL_PROFILE="0" && PANEL_LCD="1" int "Hardware LCD line width (1-64, 64 by default)" range 1 64 default 64 @@ -622,7 +626,7 @@ config PANEL_LCD_HWIDTH 64 here for a 2x40. config PANEL_LCD_CHARSET - depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" + depends on PANEL_PROFILE="0" && PANEL_LCD="1" int "LCD character set (0=normal, 1=KS0074)" range 0 1 default 0 @@ -638,7 +642,7 @@ config PANEL_LCD_CHARSET If you don't know, use the normal one (0). config PANEL_LCD_PROTO - depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" + depends on PANEL_PROFILE="0" && PANEL_LCD="1" int "LCD communication mode (0=parallel 8 bits, 1=serial)" range 0 1 default 0 @@ -651,7 +655,7 @@ config PANEL_LCD_PROTO parallel LCD, and 1 for a serial LCD. config PANEL_LCD_PIN_E - depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0" + depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0" int "Parallel port pin number & polarity connected to the LCD E signal (-17...17) " range -17 17 default 14 @@ -666,7 +670,7 @@ config PANEL_LCD_PIN_E Default for the 'E' pin in custom profile is '14' (AUTOFEED). config PANEL_LCD_PIN_RS - depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0" + depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0" int "Parallel port pin number & polarity connected to the LCD RS signal (-17...17) " range -17 17 default 17 @@ -681,7 +685,7 @@ config PANEL_LCD_PIN_RS Default for the 'RS' pin in custom profile is '17' (SELECT IN). config PANEL_LCD_PIN_RW - depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0" + depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0" int "Parallel port pin number & polarity connected to the LCD RW signal (-17...17) " range -17 17 default 16 @@ -696,7 +700,7 @@ config PANEL_LCD_PIN_RW Default for the 'RW' pin in custom profile is '16' (INIT). config PANEL_LCD_PIN_SCL - depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0" + depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0" int "Parallel port pin number & polarity connected to the LCD SCL signal (-17...17) " range -17 17 default 1 @@ -711,7 +715,7 @@ config PANEL_LCD_PIN_SCL Default for the 'SCL' pin in custom profile is '1' (STROBE). config PANEL_LCD_PIN_SDA - depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0" + depends on PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0" int "Parallel port pin number & polarity connected to the LCD SDA signal (-17...17) " range -17 17 default 2 @@ -726,7 +730,7 @@ config PANEL_LCD_PIN_SDA Default for the 'SDA' pin in custom profile is '2' (D0). config PANEL_LCD_PIN_BL - depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" + depends on PANEL_PROFILE="0" && PANEL_LCD="1" int "Parallel port pin number & polarity connected to the LCD backlight signal (-17...17) " range -17 17 default 0 @@ -741,7 +745,6 @@ config PANEL_LCD_PIN_BL Default for the 'BL' pin in custom profile is '0' (uncontrolled). config PANEL_CHANGE_MESSAGE - depends on PANEL bool "Change LCD initialization message ?" default "n" ---help--- @@ -754,7 +757,7 @@ config PANEL_CHANGE_MESSAGE say 'N' and keep the default message with the version. config PANEL_BOOT_MESSAGE - depends on PANEL && PANEL_CHANGE_MESSAGE="y" + depends on PANEL_CHANGE_MESSAGE="y" string "New initialization message" default "" ---help--- @@ -766,6 +769,8 @@ config PANEL_BOOT_MESSAGE An empty message will only clear the display at driver init time. Any other printf()-formatted message is valid with newline and escape codes. +endif # PANEL + source "drivers/misc/c2port/Kconfig" source "drivers/misc/eeprom/Kconfig" source "drivers/misc/cb710/Kconfig" diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index 31983366090a..7a3ea89339b4 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -47,6 +47,7 @@ obj-$(CONFIG_INTEL_MEI) += mei/ obj-$(CONFIG_VMWARE_VMCI) += vmw_vmci/ obj-$(CONFIG_LATTICE_ECP3_CONFIG) += lattice-ecp3-config.o obj-$(CONFIG_SRAM) += sram.o +obj-$(CONFIG_SRAM_EXEC) += sram-exec.o obj-y += mic/ obj-$(CONFIG_GENWQE) += genwqe/ obj-$(CONFIG_ECHO) += echo/ diff --git a/drivers/misc/eeprom/Kconfig b/drivers/misc/eeprom/Kconfig index c4e41c26649e..de58762097c4 100644 --- a/drivers/misc/eeprom/Kconfig +++ b/drivers/misc/eeprom/Kconfig @@ -100,4 +100,14 @@ config EEPROM_DIGSY_MTC_CFG If unsure, say N. +config EEPROM_IDT_89HPESX + tristate "IDT 89HPESx PCIe-swtiches EEPROM / CSR support" + depends on I2C && SYSFS + help + Enable this driver to get read/write access to EEPROM / CSRs + over IDT PCIe-swtich i2c-slave interface. + + This driver can also be built as a module. If so, the module + will be called idt_89hpesx. + endmenu diff --git a/drivers/misc/eeprom/Makefile b/drivers/misc/eeprom/Makefile index fc1e81d29267..90a52624ddeb 100644 --- a/drivers/misc/eeprom/Makefile +++ b/drivers/misc/eeprom/Makefile @@ -5,3 +5,4 @@ obj-$(CONFIG_EEPROM_MAX6875) += max6875.o obj-$(CONFIG_EEPROM_93CX6) += eeprom_93cx6.o obj-$(CONFIG_EEPROM_93XX46) += eeprom_93xx46.o obj-$(CONFIG_EEPROM_DIGSY_MTC_CFG) += digsy_mtc_eeprom.o +obj-$(CONFIG_EEPROM_IDT_89HPESX) += idt_89hpesx.o diff --git a/drivers/misc/eeprom/idt_89hpesx.c b/drivers/misc/eeprom/idt_89hpesx.c new file mode 100644 index 000000000000..4a22a1d99395 --- /dev/null +++ b/drivers/misc/eeprom/idt_89hpesx.c @@ -0,0 +1,1581 @@ +/* + * This file is provided under a GPLv2 license. When using or + * redistributing this file, you may do so under that license. + * + * GPL LICENSE SUMMARY + * + * Copyright (C) 2016 T-Platforms. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, it can be found <http://www.gnu.org/licenses/>. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT + * OWNER 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. + * + * IDT PCIe-switch NTB Linux driver + * + * Contact Information: + * Serge Semin <fancer.lancer@gmail.com>, <Sergey.Semin@t-platforms.ru> + */ +/* + * NOTE of the IDT 89HPESx SMBus-slave interface driver + * This driver primarily is developed to have an access to EEPROM device of + * IDT PCIe-switches. IDT provides a simple SMBus interface to perform IO- + * operations from/to EEPROM, which is located at private (so called Master) + * SMBus of switches. Using that interface this the driver creates a simple + * binary sysfs-file in the device directory: + * /sys/bus/i2c/devices/<bus>-<devaddr>/eeprom + * In case if read-only flag is specified in the dts-node of device desription, + * User-space applications won't be able to write to the EEPROM sysfs-node. + * Additionally IDT 89HPESx SMBus interface has an ability to write/read + * data of device CSRs. This driver exposes debugf-file to perform simple IO + * operations using that ability for just basic debug purpose. Particularly + * next file is created in the specific debugfs-directory: + * /sys/kernel/debug/idt_csr/ + * Format of the debugfs-node is: + * $ cat /sys/kernel/debug/idt_csr/<bus>-<devaddr>/<devname>; + * <CSR address>:<CSR value> + * So reading the content of the file gives current CSR address and it value. + * If User-space application wishes to change current CSR address, + * it can just write a proper value to the sysfs-file: + * $ echo "<CSR address>" > /sys/kernel/debug/idt_csr/<bus>-<devaddr>/<devname> + * If it wants to change the CSR value as well, the format of the write + * operation is: + * $ echo "<CSR address>:<CSR value>" > \ + * /sys/kernel/debug/idt_csr/<bus>-<devaddr>/<devname>; + * CSR address and value can be any of hexadecimal, decimal or octal format. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/sizes.h> +#include <linux/slab.h> +#include <linux/mutex.h> +#include <linux/sysfs.h> +#include <linux/debugfs.h> +#include <linux/mod_devicetable.h> +#include <linux/of.h> +#include <linux/i2c.h> +#include <linux/pci_ids.h> +#include <linux/delay.h> + +#define IDT_NAME "89hpesx" +#define IDT_89HPESX_DESC "IDT 89HPESx SMBus-slave interface driver" +#define IDT_89HPESX_VER "1.0" + +MODULE_DESCRIPTION(IDT_89HPESX_DESC); +MODULE_VERSION(IDT_89HPESX_VER); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("T-platforms"); + +/* + * csr_dbgdir - CSR read/write operations Debugfs directory + */ +static struct dentry *csr_dbgdir; + +/* + * struct idt_89hpesx_dev - IDT 89HPESx device data structure + * @eesize: Size of EEPROM in bytes (calculated from "idt,eecompatible") + * @eero: EEPROM Read-only flag + * @eeaddr: EEPROM custom address + * + * @inieecmd: Initial cmd value for EEPROM read/write operations + * @inicsrcmd: Initial cmd value for CSR read/write operations + * @iniccode: Initialial command code value for IO-operations + * + * @csr: CSR address to perform read operation + * + * @smb_write: SMBus write method + * @smb_read: SMBus read method + * @smb_mtx: SMBus mutex + * + * @client: i2c client used to perform IO operations + * + * @ee_file: EEPROM read/write sysfs-file + * @csr_file: CSR read/write debugfs-node + */ +struct idt_smb_seq; +struct idt_89hpesx_dev { + u32 eesize; + bool eero; + u8 eeaddr; + + u8 inieecmd; + u8 inicsrcmd; + u8 iniccode; + + u16 csr; + + int (*smb_write)(struct idt_89hpesx_dev *, const struct idt_smb_seq *); + int (*smb_read)(struct idt_89hpesx_dev *, struct idt_smb_seq *); + struct mutex smb_mtx; + + struct i2c_client *client; + + struct bin_attribute *ee_file; + struct dentry *csr_dir; + struct dentry *csr_file; +}; + +/* + * struct idt_smb_seq - sequence of data to be read/written from/to IDT 89HPESx + * @ccode: SMBus command code + * @bytecnt: Byte count of operation + * @data: Data to by written + */ +struct idt_smb_seq { + u8 ccode; + u8 bytecnt; + u8 *data; +}; + +/* + * struct idt_eeprom_seq - sequence of data to be read/written from/to EEPROM + * @cmd: Transaction CMD + * @eeaddr: EEPROM custom address + * @memaddr: Internal memory address of EEPROM + * @data: Data to be written at the memory address + */ +struct idt_eeprom_seq { + u8 cmd; + u8 eeaddr; + u16 memaddr; + u8 data; +} __packed; + +/* + * struct idt_csr_seq - sequence of data to be read/written from/to CSR + * @cmd: Transaction CMD + * @csraddr: Internal IDT device CSR address + * @data: Data to be read/written from/to the CSR address + */ +struct idt_csr_seq { + u8 cmd; + u16 csraddr; + u32 data; +} __packed; + +/* + * SMBus command code macros + * @CCODE_END: Indicates the end of transaction + * @CCODE_START: Indicates the start of transaction + * @CCODE_CSR: CSR read/write transaction + * @CCODE_EEPROM: EEPROM read/write transaction + * @CCODE_BYTE: Supplied data has BYTE length + * @CCODE_WORD: Supplied data has WORD length + * @CCODE_BLOCK: Supplied data has variable length passed in bytecnt + * byte right following CCODE byte + */ +#define CCODE_END ((u8)0x01) +#define CCODE_START ((u8)0x02) +#define CCODE_CSR ((u8)0x00) +#define CCODE_EEPROM ((u8)0x04) +#define CCODE_BYTE ((u8)0x00) +#define CCODE_WORD ((u8)0x20) +#define CCODE_BLOCK ((u8)0x40) +#define CCODE_PEC ((u8)0x80) + +/* + * EEPROM command macros + * @EEPROM_OP_WRITE: EEPROM write operation + * @EEPROM_OP_READ: EEPROM read operation + * @EEPROM_USA: Use specified address of EEPROM + * @EEPROM_NAERR: EEPROM device is not ready to respond + * @EEPROM_LAERR: EEPROM arbitration loss error + * @EEPROM_MSS: EEPROM misplace start & stop bits error + * @EEPROM_WR_CNT: Bytes count to perform write operation + * @EEPROM_WRRD_CNT: Bytes count to write before reading + * @EEPROM_RD_CNT: Bytes count to perform read operation + * @EEPROM_DEF_SIZE: Fall back size of EEPROM + * @EEPROM_DEF_ADDR: Defatul EEPROM address + * @EEPROM_TOUT: Timeout before retry read operation if eeprom is busy + */ +#define EEPROM_OP_WRITE ((u8)0x00) +#define EEPROM_OP_READ ((u8)0x01) +#define EEPROM_USA ((u8)0x02) +#define EEPROM_NAERR ((u8)0x08) +#define EEPROM_LAERR ((u8)0x10) +#define EEPROM_MSS ((u8)0x20) +#define EEPROM_WR_CNT ((u8)5) +#define EEPROM_WRRD_CNT ((u8)4) +#define EEPROM_RD_CNT ((u8)5) +#define EEPROM_DEF_SIZE ((u16)4096) +#define EEPROM_DEF_ADDR ((u8)0x50) +#define EEPROM_TOUT (100) + +/* + * CSR command macros + * @CSR_DWE: Enable all four bytes of the operation + * @CSR_OP_WRITE: CSR write operation + * @CSR_OP_READ: CSR read operation + * @CSR_RERR: Read operation error + * @CSR_WERR: Write operation error + * @CSR_WR_CNT: Bytes count to perform write operation + * @CSR_WRRD_CNT: Bytes count to write before reading + * @CSR_RD_CNT: Bytes count to perform read operation + * @CSR_MAX: Maximum CSR address + * @CSR_DEF: Default CSR address + * @CSR_REAL_ADDR: CSR real unshifted address + */ +#define CSR_DWE ((u8)0x0F) +#define CSR_OP_WRITE ((u8)0x00) +#define CSR_OP_READ ((u8)0x10) +#define CSR_RERR ((u8)0x40) +#define CSR_WERR ((u8)0x80) +#define CSR_WR_CNT ((u8)7) +#define CSR_WRRD_CNT ((u8)3) +#define CSR_RD_CNT ((u8)7) +#define CSR_MAX ((u32)0x3FFFF) +#define CSR_DEF ((u16)0x0000) +#define CSR_REAL_ADDR(val) ((unsigned int)val << 2) + +/* + * IDT 89HPESx basic register + * @IDT_VIDDID_CSR: PCIe VID and DID of IDT 89HPESx + * @IDT_VID_MASK: Mask of VID + */ +#define IDT_VIDDID_CSR ((u32)0x0000) +#define IDT_VID_MASK ((u32)0xFFFF) + +/* + * IDT 89HPESx can send NACK when new command is sent before previous one + * fininshed execution. In this case driver retries operation + * certain times. + * @RETRY_CNT: Number of retries before giving up and fail + * @idt_smb_safe: Generate a retry loop on corresponding SMBus method + */ +#define RETRY_CNT (128) +#define idt_smb_safe(ops, args...) ({ \ + int __retry = RETRY_CNT; \ + s32 __sts; \ + do { \ + __sts = i2c_smbus_ ## ops ## _data(args); \ + } while (__retry-- && __sts < 0); \ + __sts; \ +}) + +/*=========================================================================== + * i2c bus level IO-operations + *=========================================================================== + */ + +/* + * idt_smb_write_byte() - SMBus write method when I2C_SMBUS_BYTE_DATA operation + * is only available + * @pdev: Pointer to the driver data + * @seq: Sequence of data to be written + */ +static int idt_smb_write_byte(struct idt_89hpesx_dev *pdev, + const struct idt_smb_seq *seq) +{ + s32 sts; + u8 ccode; + int idx; + + /* Loop over the supplied data sending byte one-by-one */ + for (idx = 0; idx < seq->bytecnt; idx++) { + /* Collect the command code byte */ + ccode = seq->ccode | CCODE_BYTE; + if (idx == 0) + ccode |= CCODE_START; + if (idx == seq->bytecnt - 1) + ccode |= CCODE_END; + + /* Send data to the device */ + sts = idt_smb_safe(write_byte, pdev->client, ccode, + seq->data[idx]); + if (sts != 0) + return (int)sts; + } + + return 0; +} + +/* + * idt_smb_read_byte() - SMBus read method when I2C_SMBUS_BYTE_DATA operation + * is only available + * @pdev: Pointer to the driver data + * @seq: Buffer to read data to + */ +static int idt_smb_read_byte(struct idt_89hpesx_dev *pdev, + struct idt_smb_seq *seq) +{ + s32 sts; + u8 ccode; + int idx; + + /* Loop over the supplied buffer receiving byte one-by-one */ + for (idx = 0; idx < seq->bytecnt; idx++) { + /* Collect the command code byte */ + ccode = seq->ccode | CCODE_BYTE; + if (idx == 0) + ccode |= CCODE_START; + if (idx == seq->bytecnt - 1) + ccode |= CCODE_END; + + /* Read data from the device */ + sts = idt_smb_safe(read_byte, pdev->client, ccode); + if (sts < 0) + return (int)sts; + + seq->data[idx] = (u8)sts; + } + + return 0; +} + +/* + * idt_smb_write_word() - SMBus write method when I2C_SMBUS_BYTE_DATA and + * I2C_FUNC_SMBUS_WORD_DATA operations are available + * @pdev: Pointer to the driver data + * @seq: Sequence of data to be written + */ +static int idt_smb_write_word(struct idt_89hpesx_dev *pdev, + const struct idt_smb_seq *seq) +{ + s32 sts; + u8 ccode; + int idx, evencnt; + + /* Calculate the even count of data to send */ + evencnt = seq->bytecnt - (seq->bytecnt % 2); + + /* Loop over the supplied data sending two bytes at a time */ + for (idx = 0; idx < evencnt; idx += 2) { + /* Collect the command code byte */ + ccode = seq->ccode | CCODE_WORD; + if (idx == 0) + ccode |= CCODE_START; + if (idx == evencnt - 2) + ccode |= CCODE_END; + + /* Send word data to the device */ + sts = idt_smb_safe(write_word, pdev->client, ccode, + *(u16 *)&seq->data[idx]); + if (sts != 0) + return (int)sts; + } + + /* If there is odd number of bytes then send just one last byte */ + if (seq->bytecnt != evencnt) { + /* Collect the command code byte */ + ccode = seq->ccode | CCODE_BYTE | CCODE_END; + if (idx == 0) + ccode |= CCODE_START; + + /* Send byte data to the device */ + sts = idt_smb_safe(write_byte, pdev->client, ccode, + seq->data[idx]); + if (sts != 0) + return (int)sts; + } + + return 0; +} + +/* + * idt_smb_read_word() - SMBus read method when I2C_SMBUS_BYTE_DATA and + * I2C_FUNC_SMBUS_WORD_DATA operations are available + * @pdev: Pointer to the driver data + * @seq: Buffer to read data to + */ +static int idt_smb_read_word(struct idt_89hpesx_dev *pdev, + struct idt_smb_seq *seq) +{ + s32 sts; + u8 ccode; + int idx, evencnt; + + /* Calculate the even count of data to send */ + evencnt = seq->bytecnt - (seq->bytecnt % 2); + + /* Loop over the supplied data reading two bytes at a time */ + for (idx = 0; idx < evencnt; idx += 2) { + /* Collect the command code byte */ + ccode = seq->ccode | CCODE_WORD; + if (idx == 0) + ccode |= CCODE_START; + if (idx == evencnt - 2) + ccode |= CCODE_END; + + /* Read word data from the device */ + sts = idt_smb_safe(read_word, pdev->client, ccode); + if (sts < 0) + return (int)sts; + + *(u16 *)&seq->data[idx] = (u16)sts; + } + + /* If there is odd number of bytes then receive just one last byte */ + if (seq->bytecnt != evencnt) { + /* Collect the command code byte */ + ccode = seq->ccode | CCODE_BYTE | CCODE_END; + if (idx == 0) + ccode |= CCODE_START; + + /* Read last data byte from the device */ + sts = idt_smb_safe(read_byte, pdev->client, ccode); + if (sts < 0) + return (int)sts; + + seq->data[idx] = (u8)sts; + } + + return 0; +} + +/* + * idt_smb_write_block() - SMBus write method when I2C_SMBUS_BLOCK_DATA + * operation is available + * @pdev: Pointer to the driver data + * @seq: Sequence of data to be written + */ +static int idt_smb_write_block(struct idt_89hpesx_dev *pdev, + const struct idt_smb_seq *seq) +{ + u8 ccode; + + /* Return error if too much data passed to send */ + if (seq->bytecnt > I2C_SMBUS_BLOCK_MAX) + return -EINVAL; + + /* Collect the command code byte */ + ccode = seq->ccode | CCODE_BLOCK | CCODE_START | CCODE_END; + + /* Send block of data to the device */ + return idt_smb_safe(write_block, pdev->client, ccode, seq->bytecnt, + seq->data); +} + +/* + * idt_smb_read_block() - SMBus read method when I2C_SMBUS_BLOCK_DATA + * operation is available + * @pdev: Pointer to the driver data + * @seq: Buffer to read data to + */ +static int idt_smb_read_block(struct idt_89hpesx_dev *pdev, + struct idt_smb_seq *seq) +{ + s32 sts; + u8 ccode; + + /* Return error if too much data passed to send */ + if (seq->bytecnt > I2C_SMBUS_BLOCK_MAX) + return -EINVAL; + + /* Collect the command code byte */ + ccode = seq->ccode | CCODE_BLOCK | CCODE_START | CCODE_END; + + /* Read block of data from the device */ + sts = idt_smb_safe(read_block, pdev->client, ccode, seq->data); + if (sts != seq->bytecnt) + return (sts < 0 ? sts : -ENODATA); + + return 0; +} + +/* + * idt_smb_write_i2c_block() - SMBus write method when I2C_SMBUS_I2C_BLOCK_DATA + * operation is available + * @pdev: Pointer to the driver data + * @seq: Sequence of data to be written + * + * NOTE It's usual SMBus write block operation, except the actual data length is + * sent as first byte of data + */ +static int idt_smb_write_i2c_block(struct idt_89hpesx_dev *pdev, + const struct idt_smb_seq *seq) +{ + u8 ccode, buf[I2C_SMBUS_BLOCK_MAX + 1]; + + /* Return error if too much data passed to send */ + if (seq->bytecnt > I2C_SMBUS_BLOCK_MAX) + return -EINVAL; + + /* Collect the data to send. Length byte must be added prior the data */ + buf[0] = seq->bytecnt; + memcpy(&buf[1], seq->data, seq->bytecnt); + + /* Collect the command code byte */ + ccode = seq->ccode | CCODE_BLOCK | CCODE_START | CCODE_END; + + /* Send length and block of data to the device */ + return idt_smb_safe(write_i2c_block, pdev->client, ccode, + seq->bytecnt + 1, buf); +} + +/* + * idt_smb_read_i2c_block() - SMBus read method when I2C_SMBUS_I2C_BLOCK_DATA + * operation is available + * @pdev: Pointer to the driver data + * @seq: Buffer to read data to + * + * NOTE It's usual SMBus read block operation, except the actual data length is + * retrieved as first byte of data + */ +static int idt_smb_read_i2c_block(struct idt_89hpesx_dev *pdev, + struct idt_smb_seq *seq) +{ + u8 ccode, buf[I2C_SMBUS_BLOCK_MAX + 1]; + s32 sts; + + /* Return error if too much data passed to send */ + if (seq->bytecnt > I2C_SMBUS_BLOCK_MAX) + return -EINVAL; + + /* Collect the command code byte */ + ccode = seq->ccode | CCODE_BLOCK | CCODE_START | CCODE_END; + + /* Read length and block of data from the device */ + sts = idt_smb_safe(read_i2c_block, pdev->client, ccode, + seq->bytecnt + 1, buf); + if (sts != seq->bytecnt + 1) + return (sts < 0 ? sts : -ENODATA); + if (buf[0] != seq->bytecnt) + return -ENODATA; + + /* Copy retrieved data to the output data buffer */ + memcpy(seq->data, &buf[1], seq->bytecnt); + + return 0; +} + +/*=========================================================================== + * EEPROM IO-operations + *=========================================================================== + */ + +/* + * idt_eeprom_read_byte() - read just one byte from EEPROM + * @pdev: Pointer to the driver data + * @memaddr: Start EEPROM memory address + * @data: Data to be written to EEPROM + */ +static int idt_eeprom_read_byte(struct idt_89hpesx_dev *pdev, u16 memaddr, + u8 *data) +{ + struct device *dev = &pdev->client->dev; + struct idt_eeprom_seq eeseq; + struct idt_smb_seq smbseq; + int ret, retry; + + /* Initialize SMBus sequence fields */ + smbseq.ccode = pdev->iniccode | CCODE_EEPROM; + smbseq.data = (u8 *)&eeseq; + + /* + * Sometimes EEPROM may respond with NACK if it's busy with previous + * operation, so we need to perform a few attempts of read cycle + */ + retry = RETRY_CNT; + do { + /* Send EEPROM memory address to read data from */ + smbseq.bytecnt = EEPROM_WRRD_CNT; + eeseq.cmd = pdev->inieecmd | EEPROM_OP_READ; + eeseq.eeaddr = pdev->eeaddr; + eeseq.memaddr = cpu_to_le16(memaddr); + ret = pdev->smb_write(pdev, &smbseq); + if (ret != 0) { + dev_err(dev, "Failed to init eeprom addr 0x%02hhx", + memaddr); + break; + } + + /* Perform read operation */ + smbseq.bytecnt = EEPROM_RD_CNT; + ret = pdev->smb_read(pdev, &smbseq); + if (ret != 0) { + dev_err(dev, "Failed to read eeprom data 0x%02hhx", + memaddr); + break; + } + + /* Restart read operation if the device is busy */ + if (retry && (eeseq.cmd & EEPROM_NAERR)) { + dev_dbg(dev, "EEPROM busy, retry reading after %d ms", + EEPROM_TOUT); + msleep(EEPROM_TOUT); + continue; + } + + /* Check whether IDT successfully read data from EEPROM */ + if (eeseq.cmd & (EEPROM_NAERR | EEPROM_LAERR | EEPROM_MSS)) { + dev_err(dev, + "Communication with eeprom failed, cmd 0x%hhx", + eeseq.cmd); + ret = -EREMOTEIO; + break; + } + + /* Save retrieved data and exit the loop */ + *data = eeseq.data; + break; + } while (retry--); + + /* Return the status of operation */ + return ret; +} + +/* + * idt_eeprom_write() - EEPROM write operation + * @pdev: Pointer to the driver data + * @memaddr: Start EEPROM memory address + * @len: Length of data to be written + * @data: Data to be written to EEPROM + */ +static int idt_eeprom_write(struct idt_89hpesx_dev *pdev, u16 memaddr, u16 len, + const u8 *data) +{ + struct device *dev = &pdev->client->dev; + struct idt_eeprom_seq eeseq; + struct idt_smb_seq smbseq; + int ret; + u16 idx; + + /* Initialize SMBus sequence fields */ + smbseq.ccode = pdev->iniccode | CCODE_EEPROM; + smbseq.data = (u8 *)&eeseq; + + /* Send data byte-by-byte, checking if it is successfully written */ + for (idx = 0; idx < len; idx++, memaddr++) { + /* Lock IDT SMBus device */ + mutex_lock(&pdev->smb_mtx); + + /* Perform write operation */ + smbseq.bytecnt = EEPROM_WR_CNT; + eeseq.cmd = pdev->inieecmd | EEPROM_OP_WRITE; + eeseq.eeaddr = pdev->eeaddr; + eeseq.memaddr = cpu_to_le16(memaddr); + eeseq.data = data[idx]; + ret = pdev->smb_write(pdev, &smbseq); + if (ret != 0) { + dev_err(dev, + "Failed to write 0x%04hx:0x%02hhx to eeprom", + memaddr, data[idx]); + goto err_mutex_unlock; + } + + /* + * Check whether the data is successfully written by reading + * from the same EEPROM memory address. + */ + eeseq.data = ~data[idx]; + ret = idt_eeprom_read_byte(pdev, memaddr, &eeseq.data); + if (ret != 0) + goto err_mutex_unlock; + + /* Check whether the read byte is the same as written one */ + if (eeseq.data != data[idx]) { + dev_err(dev, "Values don't match 0x%02hhx != 0x%02hhx", + eeseq.data, data[idx]); + ret = -EREMOTEIO; + goto err_mutex_unlock; + } + + /* Unlock IDT SMBus device */ +err_mutex_unlock: + mutex_unlock(&pdev->smb_mtx); + if (ret != 0) + return ret; + } + + return 0; +} + +/* + * idt_eeprom_read() - EEPROM read operation + * @pdev: Pointer to the driver data + * @memaddr: Start EEPROM memory address + * @len: Length of data to read + * @buf: Buffer to read data to + */ +static int idt_eeprom_read(struct idt_89hpesx_dev *pdev, u16 memaddr, u16 len, + u8 *buf) +{ + int ret; + u16 idx; + + /* Read data byte-by-byte, retrying if it wasn't successful */ + for (idx = 0; idx < len; idx++, memaddr++) { + /* Lock IDT SMBus device */ + mutex_lock(&pdev->smb_mtx); + + /* Just read the byte to the buffer */ + ret = idt_eeprom_read_byte(pdev, memaddr, &buf[idx]); + + /* Unlock IDT SMBus device */ + mutex_unlock(&pdev->smb_mtx); + + /* Return error if read operation failed */ + if (ret != 0) + return ret; + } + + return 0; +} + +/*=========================================================================== + * CSR IO-operations + *=========================================================================== + */ + +/* + * idt_csr_write() - CSR write operation + * @pdev: Pointer to the driver data + * @csraddr: CSR address (with no two LS bits) + * @data: Data to be written to CSR + */ +static int idt_csr_write(struct idt_89hpesx_dev *pdev, u16 csraddr, + const u32 data) +{ + struct device *dev = &pdev->client->dev; + struct idt_csr_seq csrseq; + struct idt_smb_seq smbseq; + int ret; + + /* Initialize SMBus sequence fields */ + smbseq.ccode = pdev->iniccode | CCODE_CSR; + smbseq.data = (u8 *)&csrseq; + + /* Lock IDT SMBus device */ + mutex_lock(&pdev->smb_mtx); + + /* Perform write operation */ + smbseq.bytecnt = CSR_WR_CNT; + csrseq.cmd = pdev->inicsrcmd | CSR_OP_WRITE; + csrseq.csraddr = cpu_to_le16(csraddr); + csrseq.data = cpu_to_le32(data); + ret = pdev->smb_write(pdev, &smbseq); + if (ret != 0) { + dev_err(dev, "Failed to write 0x%04x: 0x%04x to csr", + CSR_REAL_ADDR(csraddr), data); + goto err_mutex_unlock; + } + + /* Send CSR address to read data from */ + smbseq.bytecnt = CSR_WRRD_CNT; + csrseq.cmd = pdev->inicsrcmd | CSR_OP_READ; + ret = pdev->smb_write(pdev, &smbseq); + if (ret != 0) { + dev_err(dev, "Failed to init csr address 0x%04x", + CSR_REAL_ADDR(csraddr)); + goto err_mutex_unlock; + } + + /* Perform read operation */ + smbseq.bytecnt = CSR_RD_CNT; + ret = pdev->smb_read(pdev, &smbseq); + if (ret != 0) { + dev_err(dev, "Failed to read csr 0x%04x", + CSR_REAL_ADDR(csraddr)); + goto err_mutex_unlock; + } + + /* Check whether IDT successfully retrieved CSR data */ + if (csrseq.cmd & (CSR_RERR | CSR_WERR)) { + dev_err(dev, "IDT failed to perform CSR r/w"); + ret = -EREMOTEIO; + goto err_mutex_unlock; + } + + /* Unlock IDT SMBus device */ +err_mutex_unlock: + mutex_unlock(&pdev->smb_mtx); + + return ret; +} + +/* + * idt_csr_read() - CSR read operation + * @pdev: Pointer to the driver data + * @csraddr: CSR address (with no two LS bits) + * @data: Data to be written to CSR + */ +static int idt_csr_read(struct idt_89hpesx_dev *pdev, u16 csraddr, u32 *data) +{ + struct device *dev = &pdev->client->dev; + struct idt_csr_seq csrseq; + struct idt_smb_seq smbseq; + int ret; + + /* Initialize SMBus sequence fields */ + smbseq.ccode = pdev->iniccode | CCODE_CSR; + smbseq.data = (u8 *)&csrseq; + + /* Lock IDT SMBus device */ + mutex_lock(&pdev->smb_mtx); + + /* Send CSR register address before reading it */ + smbseq.bytecnt = CSR_WRRD_CNT; + csrseq.cmd = pdev->inicsrcmd | CSR_OP_READ; + csrseq.csraddr = cpu_to_le16(csraddr); + ret = pdev->smb_write(pdev, &smbseq); + if (ret != 0) { + dev_err(dev, "Failed to init csr address 0x%04x", + CSR_REAL_ADDR(csraddr)); + goto err_mutex_unlock; + } + + /* Perform read operation */ + smbseq.bytecnt = CSR_RD_CNT; + ret = pdev->smb_read(pdev, &smbseq); + if (ret != 0) { + dev_err(dev, "Failed to read csr 0x%04hx", + CSR_REAL_ADDR(csraddr)); + goto err_mutex_unlock; + } + + /* Check whether IDT successfully retrieved CSR data */ + if (csrseq.cmd & (CSR_RERR | CSR_WERR)) { + dev_err(dev, "IDT failed to perform CSR r/w"); + ret = -EREMOTEIO; + goto err_mutex_unlock; + } + + /* Save data retrieved from IDT */ + *data = le32_to_cpu(csrseq.data); + + /* Unlock IDT SMBus device */ +err_mutex_unlock: + mutex_unlock(&pdev->smb_mtx); + + return ret; +} + +/*=========================================================================== + * Sysfs/debugfs-nodes IO-operations + *=========================================================================== + */ + +/* + * eeprom_write() - EEPROM sysfs-node write callback + * @filep: Pointer to the file system node + * @kobj: Pointer to the kernel object related to the sysfs-node + * @attr: Attributes of the file + * @buf: Buffer to write data to + * @off: Offset at which data should be written to + * @count: Number of bytes to write + */ +static ssize_t eeprom_write(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, + char *buf, loff_t off, size_t count) +{ + struct idt_89hpesx_dev *pdev; + int ret; + + /* Retrieve driver data */ + pdev = dev_get_drvdata(kobj_to_dev(kobj)); + + /* Perform EEPROM write operation */ + ret = idt_eeprom_write(pdev, (u16)off, (u16)count, (u8 *)buf); + return (ret != 0 ? ret : count); +} + +/* + * eeprom_read() - EEPROM sysfs-node read callback + * @filep: Pointer to the file system node + * @kobj: Pointer to the kernel object related to the sysfs-node + * @attr: Attributes of the file + * @buf: Buffer to write data to + * @off: Offset at which data should be written to + * @count: Number of bytes to write + */ +static ssize_t eeprom_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, + char *buf, loff_t off, size_t count) +{ + struct idt_89hpesx_dev *pdev; + int ret; + + /* Retrieve driver data */ + pdev = dev_get_drvdata(kobj_to_dev(kobj)); + + /* Perform EEPROM read operation */ + ret = idt_eeprom_read(pdev, (u16)off, (u16)count, (u8 *)buf); + return (ret != 0 ? ret : count); +} + +/* + * idt_dbgfs_csr_write() - CSR debugfs-node write callback + * @filep: Pointer to the file system file descriptor + * @buf: Buffer to read data from + * @count: Size of the buffer + * @offp: Offset within the file + * + * It accepts either "0x<reg addr>:0x<value>" for saving register address + * and writing value to specified DWORD register or "0x<reg addr>" for + * just saving register address in order to perform next read operation. + * + * WARNING No spaces are allowed. Incoming string must be strictly formated as: + * "<reg addr>:<value>". Register address must be aligned within 4 bytes + * (one DWORD). + */ +static ssize_t idt_dbgfs_csr_write(struct file *filep, const char __user *ubuf, + size_t count, loff_t *offp) +{ + struct idt_89hpesx_dev *pdev = filep->private_data; + char *colon_ch, *csraddr_str, *csrval_str; + int ret, csraddr_len, csrval_len; + u32 csraddr, csrval; + char *buf; + + /* Copy data from User-space */ + buf = kmalloc(count + 1, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + ret = simple_write_to_buffer(buf, count, offp, ubuf, count); + if (ret < 0) + goto free_buf; + buf[count] = 0; + + /* Find position of colon in the buffer */ + colon_ch = strnchr(buf, count, ':'); + + /* + * If there is colon passed then new CSR value should be parsed as + * well, so allocate buffer for CSR address substring. + * If no colon is found, then string must have just one number with + * no new CSR value + */ + if (colon_ch != NULL) { + csraddr_len = colon_ch - buf; + csraddr_str = + kmalloc(sizeof(char)*(csraddr_len + 1), GFP_KERNEL); + if (csraddr_str == NULL) { + ret = -ENOMEM; + goto free_buf; + } + /* Copy the register address to the substring buffer */ + strncpy(csraddr_str, buf, csraddr_len); + csraddr_str[csraddr_len] = '\0'; + /* Register value must follow the colon */ + csrval_str = colon_ch + 1; + csrval_len = strnlen(csrval_str, count - csraddr_len); + } else /* if (str_colon == NULL) */ { + csraddr_str = (char *)buf; /* Just to shut warning up */ + csraddr_len = strnlen(csraddr_str, count); + csrval_str = NULL; + csrval_len = 0; + } + + /* Convert CSR address to u32 value */ + ret = kstrtou32(csraddr_str, 0, &csraddr); + if (ret != 0) + goto free_csraddr_str; + + /* Check whether passed register address is valid */ + if (csraddr > CSR_MAX || !IS_ALIGNED(csraddr, SZ_4)) { + ret = -EINVAL; + goto free_csraddr_str; + } + + /* Shift register address to the right so to have u16 address */ + pdev->csr = (csraddr >> 2); + + /* Parse new CSR value and send it to IDT, if colon has been found */ + if (colon_ch != NULL) { + ret = kstrtou32(csrval_str, 0, &csrval); + if (ret != 0) + goto free_csraddr_str; + + ret = idt_csr_write(pdev, pdev->csr, csrval); + if (ret != 0) + goto free_csraddr_str; + } + + /* Free memory only if colon has been found */ +free_csraddr_str: + if (colon_ch != NULL) + kfree(csraddr_str); + + /* Free buffer allocated for data retrieved from User-space */ +free_buf: + kfree(buf); + + return (ret != 0 ? ret : count); +} + +/* + * idt_dbgfs_csr_read() - CSR debugfs-node read callback + * @filep: Pointer to the file system file descriptor + * @buf: Buffer to write data to + * @count: Size of the buffer + * @offp: Offset within the file + * + * It just prints the pair "0x<reg addr>:0x<value>" to passed buffer. + */ +#define CSRBUF_SIZE ((size_t)32) +static ssize_t idt_dbgfs_csr_read(struct file *filep, char __user *ubuf, + size_t count, loff_t *offp) +{ + struct idt_89hpesx_dev *pdev = filep->private_data; + u32 csraddr, csrval; + char buf[CSRBUF_SIZE]; + int ret, size; + + /* Perform CSR read operation */ + ret = idt_csr_read(pdev, pdev->csr, &csrval); + if (ret != 0) + return ret; + + /* Shift register address to the left so to have real address */ + csraddr = ((u32)pdev->csr << 2); + + /* Print the "0x<reg addr>:0x<value>" to buffer */ + size = snprintf(buf, CSRBUF_SIZE, "0x%05x:0x%08x\n", + (unsigned int)csraddr, (unsigned int)csrval); + + /* Copy data to User-space */ + return simple_read_from_buffer(ubuf, count, offp, buf, size); +} + +/* + * eeprom_attribute - EEPROM sysfs-node attributes + * + * NOTE Size will be changed in compliance with OF node. EEPROM attribute will + * be read-only as well if the corresponding flag is specified in OF node. + */ +static BIN_ATTR_RW(eeprom, EEPROM_DEF_SIZE); + +/* + * csr_dbgfs_ops - CSR debugfs-node read/write operations + */ +static const struct file_operations csr_dbgfs_ops = { + .owner = THIS_MODULE, + .open = simple_open, + .write = idt_dbgfs_csr_write, + .read = idt_dbgfs_csr_read +}; + +/*=========================================================================== + * Driver init/deinit methods + *=========================================================================== + */ + +/* + * idt_set_defval() - disable EEPROM access by default + * @pdev: Pointer to the driver data + */ +static void idt_set_defval(struct idt_89hpesx_dev *pdev) +{ + /* If OF info is missing then use next values */ + pdev->eesize = 0; + pdev->eero = true; + pdev->inieecmd = 0; + pdev->eeaddr = 0; +} + +#ifdef CONFIG_OF +static const struct i2c_device_id ee_ids[]; +/* + * idt_ee_match_id() - check whether the node belongs to compatible EEPROMs + */ +static const struct i2c_device_id *idt_ee_match_id(struct device_node *node) +{ + const struct i2c_device_id *id = ee_ids; + char devname[I2C_NAME_SIZE]; + + /* Retrieve the device name without manufacturer name */ + if (of_modalias_node(node, devname, sizeof(devname))) + return NULL; + + /* Search through the device name */ + while (id->name[0]) { + if (strcmp(devname, id->name) == 0) + return id; + id++; + } + return NULL; +} + +/* + * idt_get_ofdata() - get IDT i2c-device parameters from device tree + * @pdev: Pointer to the driver data + */ +static void idt_get_ofdata(struct idt_89hpesx_dev *pdev) +{ + const struct device_node *node = pdev->client->dev.of_node; + struct device *dev = &pdev->client->dev; + + /* Read dts node parameters */ + if (node) { + const struct i2c_device_id *ee_id = NULL; + struct device_node *child; + const __be32 *addr_be; + int len; + + /* Walk through all child nodes looking for compatible one */ + for_each_available_child_of_node(node, child) { + ee_id = idt_ee_match_id(child); + if (IS_ERR_OR_NULL(ee_id)) { + dev_warn(dev, "Skip unsupported child node %s", + child->full_name); + continue; + } else + break; + } + + /* If there is no child EEPROM device, then set zero size */ + if (!ee_id) { + idt_set_defval(pdev); + return; + } + + /* Retrieve EEPROM size */ + pdev->eesize = (u32)ee_id->driver_data; + + /* Get custom EEPROM address from 'reg' attribute */ + addr_be = of_get_property(child, "reg", &len); + if (!addr_be || (len < sizeof(*addr_be))) { + dev_warn(dev, "No reg on %s, use default address %d", + child->full_name, EEPROM_DEF_ADDR); + pdev->inieecmd = 0; + pdev->eeaddr = EEPROM_DEF_ADDR << 1; + } else { + pdev->inieecmd = EEPROM_USA; + pdev->eeaddr = be32_to_cpup(addr_be) << 1; + } + + /* Check EEPROM 'read-only' flag */ + if (of_get_property(child, "read-only", NULL)) + pdev->eero = true; + else /* if (!of_get_property(node, "read-only", NULL)) */ + pdev->eero = false; + + dev_dbg(dev, "EEPROM of %u bytes found by %hhu", + pdev->eesize, pdev->eeaddr); + } else { + dev_warn(dev, "No dts node, EEPROM access disabled"); + idt_set_defval(pdev); + } +} +#else +static void idt_get_ofdata(struct idt_89hpesx_dev *pdev) +{ + struct device *dev = &pdev->client->dev; + + dev_warn(dev, "OF table is unsupported, EEPROM access disabled"); + + /* Nothing we can do, just set the default values */ + idt_set_defval(pdev); +} +#endif /* CONFIG_OF */ + +/* + * idt_create_pdev() - create and init data structure of the driver + * @client: i2c client of IDT PCIe-switch device + */ +static struct idt_89hpesx_dev *idt_create_pdev(struct i2c_client *client) +{ + struct idt_89hpesx_dev *pdev; + + /* Allocate memory for driver data */ + pdev = devm_kmalloc(&client->dev, sizeof(struct idt_89hpesx_dev), + GFP_KERNEL); + if (pdev == NULL) + return ERR_PTR(-ENOMEM); + + /* Initialize basic fields of the data */ + pdev->client = client; + i2c_set_clientdata(client, pdev); + + /* Read OF nodes information */ + idt_get_ofdata(pdev); + + /* Initialize basic CSR CMD field - use full DWORD-sized r/w ops */ + pdev->inicsrcmd = CSR_DWE; + pdev->csr = CSR_DEF; + + /* Enable Packet Error Checking if it's supported by adapter */ + if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_PEC)) { + pdev->iniccode = CCODE_PEC; + client->flags |= I2C_CLIENT_PEC; + } else /* PEC is unsupported */ { + pdev->iniccode = 0; + } + + return pdev; +} + +/* + * idt_free_pdev() - free data structure of the driver + * @pdev: Pointer to the driver data + */ +static void idt_free_pdev(struct idt_89hpesx_dev *pdev) +{ + /* Clear driver data from device private field */ + i2c_set_clientdata(pdev->client, NULL); +} + +/* + * idt_set_smbus_ops() - set supported SMBus operations + * @pdev: Pointer to the driver data + * Return status of smbus check operations + */ +static int idt_set_smbus_ops(struct idt_89hpesx_dev *pdev) +{ + struct i2c_adapter *adapter = pdev->client->adapter; + struct device *dev = &pdev->client->dev; + + /* Check i2c adapter read functionality */ + if (i2c_check_functionality(adapter, + I2C_FUNC_SMBUS_READ_BLOCK_DATA)) { + pdev->smb_read = idt_smb_read_block; + dev_dbg(dev, "SMBus block-read op chosen"); + } else if (i2c_check_functionality(adapter, + I2C_FUNC_SMBUS_READ_I2C_BLOCK)) { + pdev->smb_read = idt_smb_read_i2c_block; + dev_dbg(dev, "SMBus i2c-block-read op chosen"); + } else if (i2c_check_functionality(adapter, + I2C_FUNC_SMBUS_READ_WORD_DATA) && + i2c_check_functionality(adapter, + I2C_FUNC_SMBUS_READ_BYTE_DATA)) { + pdev->smb_read = idt_smb_read_word; + dev_warn(dev, "Use slow word/byte SMBus read ops"); + } else if (i2c_check_functionality(adapter, + I2C_FUNC_SMBUS_READ_BYTE_DATA)) { + pdev->smb_read = idt_smb_read_byte; + dev_warn(dev, "Use slow byte SMBus read op"); + } else /* no supported smbus read operations */ { + dev_err(dev, "No supported SMBus read op"); + return -EPFNOSUPPORT; + } + + /* Check i2c adapter write functionality */ + if (i2c_check_functionality(adapter, + I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)) { + pdev->smb_write = idt_smb_write_block; + dev_dbg(dev, "SMBus block-write op chosen"); + } else if (i2c_check_functionality(adapter, + I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)) { + pdev->smb_write = idt_smb_write_i2c_block; + dev_dbg(dev, "SMBus i2c-block-write op chosen"); + } else if (i2c_check_functionality(adapter, + I2C_FUNC_SMBUS_WRITE_WORD_DATA) && + i2c_check_functionality(adapter, + I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) { + pdev->smb_write = idt_smb_write_word; + dev_warn(dev, "Use slow word/byte SMBus write op"); + } else if (i2c_check_functionality(adapter, + I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) { + pdev->smb_write = idt_smb_write_byte; + dev_warn(dev, "Use slow byte SMBus write op"); + } else /* no supported smbus write operations */ { + dev_err(dev, "No supported SMBus write op"); + return -EPFNOSUPPORT; + } + + /* Initialize IDT SMBus slave interface mutex */ + mutex_init(&pdev->smb_mtx); + + return 0; +} + +/* + * idt_check_dev() - check whether it's really IDT 89HPESx device + * @pdev: Pointer to the driver data + * Return status of i2c adapter check operation + */ +static int idt_check_dev(struct idt_89hpesx_dev *pdev) +{ + struct device *dev = &pdev->client->dev; + u32 viddid; + int ret; + + /* Read VID and DID directly from IDT memory space */ + ret = idt_csr_read(pdev, IDT_VIDDID_CSR, &viddid); + if (ret != 0) { + dev_err(dev, "Failed to read VID/DID"); + return ret; + } + + /* Check whether it's IDT device */ + if ((viddid & IDT_VID_MASK) != PCI_VENDOR_ID_IDT) { + dev_err(dev, "Got unsupported VID/DID: 0x%08x", viddid); + return -ENODEV; + } + + dev_info(dev, "Found IDT 89HPES device VID:0x%04x, DID:0x%04x", + (viddid & IDT_VID_MASK), (viddid >> 16)); + + return 0; +} + +/* + * idt_create_sysfs_files() - create sysfs attribute files + * @pdev: Pointer to the driver data + * Return status of operation + */ +static int idt_create_sysfs_files(struct idt_89hpesx_dev *pdev) +{ + struct device *dev = &pdev->client->dev; + int ret; + + /* Don't do anything if EEPROM isn't accessible */ + if (pdev->eesize == 0) { + dev_dbg(dev, "Skip creating sysfs-files"); + return 0; + } + + /* Allocate memory for attribute file */ + pdev->ee_file = devm_kmalloc(dev, sizeof(*pdev->ee_file), GFP_KERNEL); + if (!pdev->ee_file) + return -ENOMEM; + + /* Copy the declared EEPROM attr structure to change some of fields */ + memcpy(pdev->ee_file, &bin_attr_eeprom, sizeof(*pdev->ee_file)); + + /* In case of read-only EEPROM get rid of write ability */ + if (pdev->eero) { + pdev->ee_file->attr.mode &= ~0200; + pdev->ee_file->write = NULL; + } + /* Create EEPROM sysfs file */ + pdev->ee_file->size = pdev->eesize; + ret = sysfs_create_bin_file(&dev->kobj, pdev->ee_file); + if (ret != 0) { + dev_err(dev, "Failed to create EEPROM sysfs-node"); + return ret; + } + + return 0; +} + +/* + * idt_remove_sysfs_files() - remove sysfs attribute files + * @pdev: Pointer to the driver data + */ +static void idt_remove_sysfs_files(struct idt_89hpesx_dev *pdev) +{ + struct device *dev = &pdev->client->dev; + + /* Don't do anything if EEPROM wasn't accessible */ + if (pdev->eesize == 0) + return; + + /* Remove EEPROM sysfs file */ + sysfs_remove_bin_file(&dev->kobj, pdev->ee_file); +} + +/* + * idt_create_dbgfs_files() - create debugfs files + * @pdev: Pointer to the driver data + */ +#define CSRNAME_LEN ((size_t)32) +static void idt_create_dbgfs_files(struct idt_89hpesx_dev *pdev) +{ + struct i2c_client *cli = pdev->client; + char fname[CSRNAME_LEN]; + + /* Create Debugfs directory for CSR file */ + snprintf(fname, CSRNAME_LEN, "%d-%04hx", cli->adapter->nr, cli->addr); + pdev->csr_dir = debugfs_create_dir(fname, csr_dbgdir); + + /* Create Debugfs file for CSR read/write operations */ + pdev->csr_file = debugfs_create_file(cli->name, 0600, + pdev->csr_dir, pdev, &csr_dbgfs_ops); +} + +/* + * idt_remove_dbgfs_files() - remove debugfs files + * @pdev: Pointer to the driver data + */ +static void idt_remove_dbgfs_files(struct idt_89hpesx_dev *pdev) +{ + /* Remove CSR directory and it sysfs-node */ + debugfs_remove_recursive(pdev->csr_dir); +} + +/* + * idt_probe() - IDT 89HPESx driver probe() callback method + */ +static int idt_probe(struct i2c_client *client, const struct i2c_device_id *id) +{ + struct idt_89hpesx_dev *pdev; + int ret; + + /* Create driver data */ + pdev = idt_create_pdev(client); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + + /* Set SMBus operations */ + ret = idt_set_smbus_ops(pdev); + if (ret != 0) + goto err_free_pdev; + + /* Check whether it is truly IDT 89HPESx device */ + ret = idt_check_dev(pdev); + if (ret != 0) + goto err_free_pdev; + + /* Create sysfs files */ + ret = idt_create_sysfs_files(pdev); + if (ret != 0) + goto err_free_pdev; + + /* Create debugfs files */ + idt_create_dbgfs_files(pdev); + + return 0; + +err_free_pdev: + idt_free_pdev(pdev); + + return ret; +} + +/* + * idt_remove() - IDT 89HPESx driver remove() callback method + */ +static int idt_remove(struct i2c_client *client) +{ + struct idt_89hpesx_dev *pdev = i2c_get_clientdata(client); + + /* Remove debugfs files first */ + idt_remove_dbgfs_files(pdev); + + /* Remove sysfs files */ + idt_remove_sysfs_files(pdev); + + /* Discard driver data structure */ + idt_free_pdev(pdev); + + return 0; +} + +/* + * ee_ids - array of supported EEPROMs + */ +static const struct i2c_device_id ee_ids[] = { + { "24c32", 4096}, + { "24c64", 8192}, + { "24c128", 16384}, + { "24c256", 32768}, + { "24c512", 65536}, + {} +}; +MODULE_DEVICE_TABLE(i2c, ee_ids); + +/* + * idt_ids - supported IDT 89HPESx devices + */ +static const struct i2c_device_id idt_ids[] = { + { "89hpes8nt2", 0 }, + { "89hpes12nt3", 0 }, + + { "89hpes24nt6ag2", 0 }, + { "89hpes32nt8ag2", 0 }, + { "89hpes32nt8bg2", 0 }, + { "89hpes12nt12g2", 0 }, + { "89hpes16nt16g2", 0 }, + { "89hpes24nt24g2", 0 }, + { "89hpes32nt24ag2", 0 }, + { "89hpes32nt24bg2", 0 }, + + { "89hpes12n3", 0 }, + { "89hpes12n3a", 0 }, + { "89hpes24n3", 0 }, + { "89hpes24n3a", 0 }, + + { "89hpes32h8", 0 }, + { "89hpes32h8g2", 0 }, + { "89hpes48h12", 0 }, + { "89hpes48h12g2", 0 }, + { "89hpes48h12ag2", 0 }, + { "89hpes16h16", 0 }, + { "89hpes22h16", 0 }, + { "89hpes22h16g2", 0 }, + { "89hpes34h16", 0 }, + { "89hpes34h16g2", 0 }, + { "89hpes64h16", 0 }, + { "89hpes64h16g2", 0 }, + { "89hpes64h16ag2", 0 }, + + /* { "89hpes3t3", 0 }, // No SMBus-slave iface */ + { "89hpes12t3g2", 0 }, + { "89hpes24t3g2", 0 }, + /* { "89hpes4t4", 0 }, // No SMBus-slave iface */ + { "89hpes16t4", 0 }, + { "89hpes4t4g2", 0 }, + { "89hpes10t4g2", 0 }, + { "89hpes16t4g2", 0 }, + { "89hpes16t4ag2", 0 }, + { "89hpes5t5", 0 }, + { "89hpes6t5", 0 }, + { "89hpes8t5", 0 }, + { "89hpes8t5a", 0 }, + { "89hpes24t6", 0 }, + { "89hpes6t6g2", 0 }, + { "89hpes24t6g2", 0 }, + { "89hpes16t7", 0 }, + { "89hpes32t8", 0 }, + { "89hpes32t8g2", 0 }, + { "89hpes48t12", 0 }, + { "89hpes48t12g2", 0 }, + { /* END OF LIST */ } +}; +MODULE_DEVICE_TABLE(i2c, idt_ids); + +/* + * idt_driver - IDT 89HPESx driver structure + */ +static struct i2c_driver idt_driver = { + .driver = { + .name = IDT_NAME, + }, + .probe = idt_probe, + .remove = idt_remove, + .id_table = idt_ids, +}; + +/* + * idt_init() - IDT 89HPESx driver init() callback method + */ +static int __init idt_init(void) +{ + /* Create Debugfs directory first */ + if (debugfs_initialized()) + csr_dbgdir = debugfs_create_dir("idt_csr", NULL); + + /* Add new i2c-device driver */ + return i2c_add_driver(&idt_driver); +} +module_init(idt_init); + +/* + * idt_exit() - IDT 89HPESx driver exit() callback method + */ +static void __exit idt_exit(void) +{ + /* Discard debugfs directory and all files if any */ + debugfs_remove_recursive(csr_dbgdir); + + /* Unregister i2c-device driver */ + i2c_del_driver(&idt_driver); +} +module_exit(idt_exit); diff --git a/drivers/misc/genwqe/card_base.c b/drivers/misc/genwqe/card_base.c index 6c1f49a85023..4fd21e86ad56 100644 --- a/drivers/misc/genwqe/card_base.c +++ b/drivers/misc/genwqe/card_base.c @@ -1336,7 +1336,6 @@ static int genwqe_sriov_configure(struct pci_dev *dev, int numvfs) static struct pci_error_handlers genwqe_err_handler = { .error_detected = genwqe_err_error_detected, .mmio_enabled = genwqe_err_result_none, - .link_reset = genwqe_err_result_none, .slot_reset = genwqe_err_slot_reset, .resume = genwqe_err_resume, }; diff --git a/drivers/misc/lkdtm_bugs.c b/drivers/misc/lkdtm_bugs.c index cba0837aee2e..e3f4cd8876b5 100644 --- a/drivers/misc/lkdtm_bugs.c +++ b/drivers/misc/lkdtm_bugs.c @@ -81,12 +81,17 @@ void lkdtm_OVERFLOW(void) (void) recursive_loop(recur_count); } +static noinline void __lkdtm_CORRUPT_STACK(void *stack) +{ + memset(stack, 'a', 64); +} + noinline void lkdtm_CORRUPT_STACK(void) { /* Use default char array length that triggers stack protection. */ char data[8]; + __lkdtm_CORRUPT_STACK(&data); - memset((void *)data, 'a', 64); pr_info("Corrupted stack with '%16s'...\n", data); } diff --git a/drivers/misc/lkdtm_core.c b/drivers/misc/lkdtm_core.c index 16e4cf110930..b9a4cd4a9b68 100644 --- a/drivers/misc/lkdtm_core.c +++ b/drivers/misc/lkdtm_core.c @@ -539,7 +539,9 @@ static void __exit lkdtm_module_exit(void) /* Handle test-specific clean-up. */ lkdtm_usercopy_exit(); - unregister_jprobe(lkdtm_jprobe); + if (lkdtm_jprobe != NULL) + unregister_jprobe(lkdtm_jprobe); + pr_info("Crash point unregistered\n"); } diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c index 466afb2611c6..0e7406ccb6dd 100644 --- a/drivers/misc/mei/amthif.c +++ b/drivers/misc/mei/amthif.c @@ -132,8 +132,7 @@ int mei_amthif_run_next_cmd(struct mei_device *dev) dev_dbg(dev->dev, "complete amthif cmd_list cb.\n"); - cb = list_first_entry_or_null(&dev->amthif_cmd_list.list, - typeof(*cb), list); + cb = list_first_entry_or_null(&dev->amthif_cmd_list, typeof(*cb), list); if (!cb) { dev->iamthif_state = MEI_IAMTHIF_IDLE; cl->fp = NULL; @@ -167,7 +166,7 @@ int mei_amthif_write(struct mei_cl *cl, struct mei_cl_cb *cb) struct mei_device *dev = cl->dev; - list_add_tail(&cb->list, &dev->amthif_cmd_list.list); + list_add_tail(&cb->list, &dev->amthif_cmd_list); /* * The previous request is still in processing, queue this one. @@ -211,7 +210,7 @@ unsigned int mei_amthif_poll(struct file *file, poll_table *wait) * Return: 0, OK; otherwise, error. */ int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list) + struct list_head *cmpl_list) { int ret; @@ -237,7 +236,7 @@ int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, */ int mei_amthif_irq_read_msg(struct mei_cl *cl, struct mei_msg_hdr *mei_hdr, - struct mei_cl_cb *cmpl_list) + struct list_head *cmpl_list) { struct mei_device *dev; int ret; @@ -312,50 +311,30 @@ void mei_amthif_complete(struct mei_cl *cl, struct mei_cl_cb *cb) } /** - * mei_clear_list - removes all callbacks associated with file - * from mei_cb_list - * - * @file: file structure - * @mei_cb_list: callbacks list - * - * mei_clear_list is called to clear resources associated with file - * when application calls close function or Ctrl-C was pressed - */ -static void mei_clear_list(const struct file *file, - struct list_head *mei_cb_list) -{ - struct mei_cl_cb *cb, *next; - - list_for_each_entry_safe(cb, next, mei_cb_list, list) - if (file == cb->fp) - mei_io_cb_free(cb); -} - -/** * mei_amthif_release - the release function * * @dev: device structure -* @file: pointer to file structure +* @fp: pointer to file structure * * Return: 0 on success, <0 on error */ -int mei_amthif_release(struct mei_device *dev, struct file *file) +int mei_amthif_release(struct mei_device *dev, struct file *fp) { - struct mei_cl *cl = file->private_data; + struct mei_cl *cl = fp->private_data; if (dev->iamthif_open_count > 0) dev->iamthif_open_count--; - if (cl->fp == file && dev->iamthif_state != MEI_IAMTHIF_IDLE) { + if (cl->fp == fp && dev->iamthif_state != MEI_IAMTHIF_IDLE) { dev_dbg(dev->dev, "amthif canceled iamthif state %d\n", - dev->iamthif_state); + dev->iamthif_state); dev->iamthif_canceled = true; } - mei_clear_list(file, &dev->amthif_cmd_list.list); - mei_clear_list(file, &cl->rd_completed); - mei_clear_list(file, &dev->ctrl_rd_list.list); + /* Don't clean ctrl_rd_list here, the reads has to be completed */ + mei_io_list_free_fp(&dev->amthif_cmd_list, fp); + mei_io_list_free_fp(&cl->rd_completed, fp); return 0; } diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 2d9c5dd06e42..cb3e9e0ca049 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -499,6 +499,25 @@ out: EXPORT_SYMBOL_GPL(mei_cldev_enable); /** + * mei_cldev_unregister_callbacks - internal wrapper for unregistering + * callbacks. + * + * @cldev: client device + */ +static void mei_cldev_unregister_callbacks(struct mei_cl_device *cldev) +{ + if (cldev->rx_cb) { + cancel_work_sync(&cldev->rx_work); + cldev->rx_cb = NULL; + } + + if (cldev->notif_cb) { + cancel_work_sync(&cldev->notif_work); + cldev->notif_cb = NULL; + } +} + +/** * mei_cldev_disable - disable me client device * disconnect form the me client * @@ -519,6 +538,8 @@ int mei_cldev_disable(struct mei_cl_device *cldev) bus = cldev->bus; + mei_cldev_unregister_callbacks(cldev); + mutex_lock(&bus->device_lock); if (!mei_cl_is_connected(cl)) { @@ -542,6 +563,37 @@ out: EXPORT_SYMBOL_GPL(mei_cldev_disable); /** + * mei_cl_bus_module_get - acquire module of the underlying + * hw module. + * + * @cl: host client + * + * Return: true on success; false if the module was removed. + */ +bool mei_cl_bus_module_get(struct mei_cl *cl) +{ + struct mei_cl_device *cldev = cl->cldev; + + if (!cldev) + return true; + + return try_module_get(cldev->bus->dev->driver->owner); +} + +/** + * mei_cl_bus_module_put - release the underlying hw module. + * + * @cl: host client + */ +void mei_cl_bus_module_put(struct mei_cl *cl) +{ + struct mei_cl_device *cldev = cl->cldev; + + if (cldev) + module_put(cldev->bus->dev->driver->owner); +} + +/** * mei_cl_device_find - find matching entry in the driver id table * * @cldev: me client device @@ -665,19 +717,12 @@ static int mei_cl_device_remove(struct device *dev) if (!cldev || !dev->driver) return 0; - if (cldev->rx_cb) { - cancel_work_sync(&cldev->rx_work); - cldev->rx_cb = NULL; - } - if (cldev->notif_cb) { - cancel_work_sync(&cldev->notif_work); - cldev->notif_cb = NULL; - } - cldrv = to_mei_cl_driver(dev->driver); if (cldrv->remove) ret = cldrv->remove(cldev); + mei_cldev_unregister_callbacks(cldev); + module_put(THIS_MODULE); dev->driver = NULL; return ret; diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index b0395601c6ae..68fe37b5bc52 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -377,19 +377,19 @@ static struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, } /** - * __mei_io_list_flush - removes and frees cbs belonging to cl. + * __mei_io_list_flush_cl - removes and frees cbs belonging to cl. * - * @list: an instance of our list structure + * @head: an instance of our list structure * @cl: host client, can be NULL for flushing the whole list * @free: whether to free the cbs */ -static void __mei_io_list_flush(struct mei_cl_cb *list, - struct mei_cl *cl, bool free) +static void __mei_io_list_flush_cl(struct list_head *head, + const struct mei_cl *cl, bool free) { struct mei_cl_cb *cb, *next; /* enable removing everything if no cl is specified */ - list_for_each_entry_safe(cb, next, &list->list, list) { + list_for_each_entry_safe(cb, next, head, list) { if (!cl || mei_cl_cmp_id(cl, cb->cl)) { list_del_init(&cb->list); if (free) @@ -399,25 +399,42 @@ static void __mei_io_list_flush(struct mei_cl_cb *list, } /** - * mei_io_list_flush - removes list entry belonging to cl. + * mei_io_list_flush_cl - removes list entry belonging to cl. * - * @list: An instance of our list structure + * @head: An instance of our list structure * @cl: host client */ -void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl) +static inline void mei_io_list_flush_cl(struct list_head *head, + const struct mei_cl *cl) { - __mei_io_list_flush(list, cl, false); + __mei_io_list_flush_cl(head, cl, false); } /** - * mei_io_list_free - removes cb belonging to cl and free them + * mei_io_list_free_cl - removes cb belonging to cl and free them * - * @list: An instance of our list structure + * @head: An instance of our list structure * @cl: host client */ -static inline void mei_io_list_free(struct mei_cl_cb *list, struct mei_cl *cl) +static inline void mei_io_list_free_cl(struct list_head *head, + const struct mei_cl *cl) { - __mei_io_list_flush(list, cl, true); + __mei_io_list_flush_cl(head, cl, true); +} + +/** + * mei_io_list_free_fp - free cb from a list that matches file pointer + * + * @head: io list + * @fp: file pointer (matching cb file object), may be NULL + */ +void mei_io_list_free_fp(struct list_head *head, const struct file *fp) +{ + struct mei_cl_cb *cb, *next; + + list_for_each_entry_safe(cb, next, head, list) + if (!fp || fp == cb->fp) + mei_io_cb_free(cb); } /** @@ -479,7 +496,7 @@ struct mei_cl_cb *mei_cl_enqueue_ctrl_wr_cb(struct mei_cl *cl, size_t length, if (!cb) return NULL; - list_add_tail(&cb->list, &cl->dev->ctrl_wr_list.list); + list_add_tail(&cb->list, &cl->dev->ctrl_wr_list); return cb; } @@ -504,27 +521,6 @@ struct mei_cl_cb *mei_cl_read_cb(const struct mei_cl *cl, const struct file *fp) } /** - * mei_cl_read_cb_flush - free client's read pending and completed cbs - * for a specific file - * - * @cl: host client - * @fp: file pointer (matching cb file object), may be NULL - */ -void mei_cl_read_cb_flush(const struct mei_cl *cl, const struct file *fp) -{ - struct mei_cl_cb *cb, *next; - - list_for_each_entry_safe(cb, next, &cl->rd_completed, list) - if (!fp || fp == cb->fp) - mei_io_cb_free(cb); - - - list_for_each_entry_safe(cb, next, &cl->rd_pending, list) - if (!fp || fp == cb->fp) - mei_io_cb_free(cb); -} - -/** * mei_cl_flush_queues - flushes queue lists belonging to cl. * * @cl: host client @@ -542,18 +538,16 @@ int mei_cl_flush_queues(struct mei_cl *cl, const struct file *fp) dev = cl->dev; cl_dbg(dev, cl, "remove list entry belonging to cl\n"); - mei_io_list_free(&cl->dev->write_list, cl); - mei_io_list_free(&cl->dev->write_waiting_list, cl); - mei_io_list_flush(&cl->dev->ctrl_wr_list, cl); - mei_io_list_flush(&cl->dev->ctrl_rd_list, cl); - mei_io_list_flush(&cl->dev->amthif_cmd_list, cl); - - mei_cl_read_cb_flush(cl, fp); + mei_io_list_free_cl(&cl->dev->write_list, cl); + mei_io_list_free_cl(&cl->dev->write_waiting_list, cl); + mei_io_list_flush_cl(&cl->dev->ctrl_wr_list, cl); + mei_io_list_flush_cl(&cl->dev->ctrl_rd_list, cl); + mei_io_list_free_fp(&cl->rd_pending, fp); + mei_io_list_free_fp(&cl->rd_completed, fp); return 0; } - /** * mei_cl_init - initializes cl. * @@ -756,7 +750,7 @@ static void mei_cl_wake_all(struct mei_cl *cl) * * @cl: host client */ -void mei_cl_set_disconnected(struct mei_cl *cl) +static void mei_cl_set_disconnected(struct mei_cl *cl) { struct mei_device *dev = cl->dev; @@ -765,15 +759,18 @@ void mei_cl_set_disconnected(struct mei_cl *cl) return; cl->state = MEI_FILE_DISCONNECTED; - mei_io_list_free(&dev->write_list, cl); - mei_io_list_free(&dev->write_waiting_list, cl); - mei_io_list_flush(&dev->ctrl_rd_list, cl); - mei_io_list_flush(&dev->ctrl_wr_list, cl); + mei_io_list_free_cl(&dev->write_list, cl); + mei_io_list_free_cl(&dev->write_waiting_list, cl); + mei_io_list_flush_cl(&dev->ctrl_rd_list, cl); + mei_io_list_flush_cl(&dev->ctrl_wr_list, cl); + mei_io_list_free_cl(&dev->amthif_cmd_list, cl); mei_cl_wake_all(cl); cl->rx_flow_ctrl_creds = 0; cl->tx_flow_ctrl_creds = 0; cl->timer_count = 0; + mei_cl_bus_module_put(cl); + if (!cl->me_cl) return; @@ -829,7 +826,7 @@ static int mei_cl_send_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb) return ret; } - list_move_tail(&cb->list, &dev->ctrl_rd_list.list); + list_move_tail(&cb->list, &dev->ctrl_rd_list); cl->timer_count = MEI_CONNECT_TIMEOUT; mei_schedule_stall_timer(dev); @@ -847,7 +844,7 @@ static int mei_cl_send_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb) * Return: 0, OK; otherwise, error. */ int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list) + struct list_head *cmpl_list) { struct mei_device *dev = cl->dev; u32 msg_slots; @@ -862,7 +859,7 @@ int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb, ret = mei_cl_send_disconnect(cl, cb); if (ret) - list_move_tail(&cb->list, &cmpl_list->list); + list_move_tail(&cb->list, cmpl_list); return ret; } @@ -984,7 +981,7 @@ static bool mei_cl_is_other_connecting(struct mei_cl *cl) dev = cl->dev; - list_for_each_entry(cb, &dev->ctrl_rd_list.list, list) { + list_for_each_entry(cb, &dev->ctrl_rd_list, list) { if (cb->fop_type == MEI_FOP_CONNECT && mei_cl_me_id(cl) == mei_cl_me_id(cb->cl)) return true; @@ -1015,7 +1012,7 @@ static int mei_cl_send_connect(struct mei_cl *cl, struct mei_cl_cb *cb) return ret; } - list_move_tail(&cb->list, &dev->ctrl_rd_list.list); + list_move_tail(&cb->list, &dev->ctrl_rd_list); cl->timer_count = MEI_CONNECT_TIMEOUT; mei_schedule_stall_timer(dev); return 0; @@ -1031,7 +1028,7 @@ static int mei_cl_send_connect(struct mei_cl *cl, struct mei_cl_cb *cb) * Return: 0, OK; otherwise, error. */ int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list) + struct list_head *cmpl_list) { struct mei_device *dev = cl->dev; u32 msg_slots; @@ -1049,7 +1046,7 @@ int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb, rets = mei_cl_send_connect(cl, cb); if (rets) - list_move_tail(&cb->list, &cmpl_list->list); + list_move_tail(&cb->list, cmpl_list); return rets; } @@ -1077,13 +1074,17 @@ int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl, dev = cl->dev; + if (!mei_cl_bus_module_get(cl)) + return -ENODEV; + rets = mei_cl_set_connecting(cl, me_cl); if (rets) - return rets; + goto nortpm; if (mei_cl_is_fixed_address(cl)) { cl->state = MEI_FILE_CONNECTED; - return 0; + rets = 0; + goto nortpm; } rets = pm_runtime_get(dev->dev); @@ -1117,8 +1118,8 @@ int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl, if (!mei_cl_is_connected(cl)) { if (cl->state == MEI_FILE_DISCONNECT_REQUIRED) { - mei_io_list_flush(&dev->ctrl_rd_list, cl); - mei_io_list_flush(&dev->ctrl_wr_list, cl); + mei_io_list_flush_cl(&dev->ctrl_rd_list, cl); + mei_io_list_flush_cl(&dev->ctrl_wr_list, cl); /* ignore disconnect return valuue; * in case of failure reset will be invoked */ @@ -1270,7 +1271,7 @@ enum mei_cb_file_ops mei_cl_notify_req2fop(u8 req) * Return: 0 on such and error otherwise. */ int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list) + struct list_head *cmpl_list) { struct mei_device *dev = cl->dev; u32 msg_slots; @@ -1288,11 +1289,11 @@ int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb, ret = mei_hbm_cl_notify_req(dev, cl, request); if (ret) { cl->status = ret; - list_move_tail(&cb->list, &cmpl_list->list); + list_move_tail(&cb->list, cmpl_list); return ret; } - list_move_tail(&cb->list, &dev->ctrl_rd_list.list); + list_move_tail(&cb->list, &dev->ctrl_rd_list); return 0; } @@ -1325,6 +1326,9 @@ int mei_cl_notify_request(struct mei_cl *cl, return -EOPNOTSUPP; } + if (!mei_cl_is_connected(cl)) + return -ENODEV; + rets = pm_runtime_get(dev->dev); if (rets < 0 && rets != -EINPROGRESS) { pm_runtime_put_noidle(dev->dev); @@ -1344,7 +1348,7 @@ int mei_cl_notify_request(struct mei_cl *cl, rets = -ENODEV; goto out; } - list_move_tail(&cb->list, &dev->ctrl_rd_list.list); + list_move_tail(&cb->list, &dev->ctrl_rd_list); } mutex_unlock(&dev->device_lock); @@ -1419,6 +1423,11 @@ int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev) dev = cl->dev; + if (!dev->hbm_f_ev_supported) { + cl_dbg(dev, cl, "notifications not supported\n"); + return -EOPNOTSUPP; + } + if (!mei_cl_is_connected(cl)) return -ENODEV; @@ -1519,7 +1528,7 @@ nortpm: * Return: 0, OK; otherwise error. */ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list) + struct list_head *cmpl_list) { struct mei_device *dev; struct mei_msg_data *buf; @@ -1591,13 +1600,13 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, } if (mei_hdr.msg_complete) - list_move_tail(&cb->list, &dev->write_waiting_list.list); + list_move_tail(&cb->list, &dev->write_waiting_list); return 0; err: cl->status = rets; - list_move_tail(&cb->list, &cmpl_list->list); + list_move_tail(&cb->list, cmpl_list); return rets; } @@ -1687,9 +1696,9 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb) out: if (mei_hdr.msg_complete) - list_add_tail(&cb->list, &dev->write_waiting_list.list); + list_add_tail(&cb->list, &dev->write_waiting_list); else - list_add_tail(&cb->list, &dev->write_list.list); + list_add_tail(&cb->list, &dev->write_list); cb = NULL; if (blocking && cl->writing_state != MEI_WRITE_COMPLETE) { diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h index f2545af9be7b..545ae319ba90 100644 --- a/drivers/misc/mei/client.h +++ b/drivers/misc/mei/client.h @@ -83,17 +83,7 @@ static inline u8 mei_me_cl_ver(const struct mei_me_client *me_cl) * MEI IO Functions */ void mei_io_cb_free(struct mei_cl_cb *priv_cb); - -/** - * mei_io_list_init - Sets up a queue list. - * - * @list: An instance cl callback structure - */ -static inline void mei_io_list_init(struct mei_cl_cb *list) -{ - INIT_LIST_HEAD(&list->list); -} -void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl); +void mei_io_list_free_fp(struct list_head *head, const struct file *fp); /* * MEI Host Client Functions @@ -110,7 +100,6 @@ struct mei_cl *mei_cl_alloc_linked(struct mei_device *dev); struct mei_cl_cb *mei_cl_read_cb(const struct mei_cl *cl, const struct file *fp); -void mei_cl_read_cb_flush(const struct mei_cl *cl, const struct file *fp); struct mei_cl_cb *mei_cl_alloc_cb(struct mei_cl *cl, size_t length, enum mei_cb_file_ops type, const struct file *fp); @@ -209,19 +198,18 @@ static inline u8 mei_cl_host_addr(const struct mei_cl *cl) } int mei_cl_disconnect(struct mei_cl *cl); -void mei_cl_set_disconnected(struct mei_cl *cl); int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list); + struct list_head *cmpl_list); int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl, const struct file *file); int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list); + struct list_head *cmpl_list); int mei_cl_read_start(struct mei_cl *cl, size_t length, const struct file *fp); int mei_cl_irq_read_msg(struct mei_cl *cl, struct mei_msg_hdr *hdr, - struct mei_cl_cb *cmpl_list); + struct list_head *cmpl_list); int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb); int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list); + struct list_head *cmpl_list); void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb); @@ -232,7 +220,7 @@ enum mei_cb_file_ops mei_cl_notify_req2fop(u8 request); int mei_cl_notify_request(struct mei_cl *cl, const struct file *file, u8 request); int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list); + struct list_head *cmpl_list); int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev); void mei_cl_notify(struct mei_cl *cl); diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c index 25b4a1ba522d..ba3a774c8d71 100644 --- a/drivers/misc/mei/hbm.c +++ b/drivers/misc/mei/hbm.c @@ -815,7 +815,7 @@ static void mei_hbm_cl_res(struct mei_device *dev, struct mei_cl_cb *cb, *next; cl = NULL; - list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { + list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list, list) { cl = cb->cl; diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index a05375a3338a..71216affcab1 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -140,6 +140,19 @@ static inline void mei_hcsr_set(struct mei_device *dev, u32 reg) } /** + * mei_hcsr_set_hig - set host interrupt (set H_IG) + * + * @dev: the device structure + */ +static inline void mei_hcsr_set_hig(struct mei_device *dev) +{ + u32 hcsr; + + hcsr = mei_hcsr_read(dev) | H_IG; + mei_hcsr_set(dev, hcsr); +} + +/** * mei_me_d0i3c_read - Reads 32bit data from the D0I3C register * * @dev: the device structure @@ -381,6 +394,19 @@ static bool mei_me_hw_is_ready(struct mei_device *dev) } /** + * mei_me_hw_is_resetting - check whether the me(hw) is in reset + * + * @dev: mei device + * Return: bool + */ +static bool mei_me_hw_is_resetting(struct mei_device *dev) +{ + u32 mecsr = mei_me_mecsr_read(dev); + + return (mecsr & ME_RST_HRA) == ME_RST_HRA; +} + +/** * mei_me_hw_ready_wait - wait until the me(hw) has turned ready * or timeout is reached * @@ -505,7 +531,6 @@ static int mei_me_hbuf_write(struct mei_device *dev, unsigned long rem; unsigned long length = header->length; u32 *reg_buf = (u32 *)buf; - u32 hcsr; u32 dw_cnt; int i; int empty_slots; @@ -532,8 +557,7 @@ static int mei_me_hbuf_write(struct mei_device *dev, mei_me_hcbww_write(dev, reg); } - hcsr = mei_hcsr_read(dev) | H_IG; - mei_hcsr_set(dev, hcsr); + mei_hcsr_set_hig(dev); if (!mei_me_hw_is_ready(dev)) return -EIO; @@ -580,7 +604,6 @@ static int mei_me_read_slots(struct mei_device *dev, unsigned char *buffer, unsigned long buffer_length) { u32 *reg_buf = (u32 *)buffer; - u32 hcsr; for (; buffer_length >= sizeof(u32); buffer_length -= sizeof(u32)) *reg_buf++ = mei_me_mecbrw_read(dev); @@ -591,8 +614,7 @@ static int mei_me_read_slots(struct mei_device *dev, unsigned char *buffer, memcpy(reg_buf, ®, buffer_length); } - hcsr = mei_hcsr_read(dev) | H_IG; - mei_hcsr_set(dev, hcsr); + mei_hcsr_set_hig(dev); return 0; } @@ -1189,7 +1211,7 @@ irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id) irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id) { struct mei_device *dev = (struct mei_device *) dev_id; - struct mei_cl_cb complete_list; + struct list_head cmpl_list; s32 slots; u32 hcsr; int rets = 0; @@ -1201,7 +1223,7 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id) hcsr = mei_hcsr_read(dev); me_intr_clear(dev, hcsr); - mei_io_list_init(&complete_list); + INIT_LIST_HEAD(&cmpl_list); /* check if ME wants a reset */ if (!mei_hw_is_ready(dev) && dev->dev_state != MEI_DEV_RESETTING) { @@ -1210,6 +1232,9 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id) goto end; } + if (mei_me_hw_is_resetting(dev)) + mei_hcsr_set_hig(dev); + mei_me_pg_intr(dev, me_intr_src(hcsr)); /* check if we need to start the dev */ @@ -1227,7 +1252,7 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id) slots = mei_count_full_read_slots(dev); while (slots > 0) { dev_dbg(dev->dev, "slots to read = %08x\n", slots); - rets = mei_irq_read_handler(dev, &complete_list, &slots); + rets = mei_irq_read_handler(dev, &cmpl_list, &slots); /* There is a race between ME write and interrupt delivery: * Not all data is always available immediately after the * interrupt, so try to read again on the next interrupt. @@ -1252,11 +1277,11 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id) */ if (dev->pg_event != MEI_PG_EVENT_WAIT && dev->pg_event != MEI_PG_EVENT_RECEIVED) { - rets = mei_irq_write_handler(dev, &complete_list); + rets = mei_irq_write_handler(dev, &cmpl_list); dev->hbuf_is_ready = mei_hbuf_is_ready(dev); } - mei_irq_compl_handler(dev, &complete_list); + mei_irq_compl_handler(dev, &cmpl_list); end: dev_dbg(dev->dev, "interrupt thread end ret = %d\n", rets); @@ -1389,7 +1414,7 @@ const struct mei_cfg mei_me_pch8_sps_cfg = { * @pdev: The pci device structure * @cfg: per device generation config * - * Return: The mei_device_device pointer on success, NULL on failure. + * Return: The mei_device pointer on success, NULL on failure. */ struct mei_device *mei_me_dev_init(struct pci_dev *pdev, const struct mei_cfg *cfg) @@ -1397,8 +1422,8 @@ struct mei_device *mei_me_dev_init(struct pci_dev *pdev, struct mei_device *dev; struct mei_me_hw *hw; - dev = kzalloc(sizeof(struct mei_device) + - sizeof(struct mei_me_hw), GFP_KERNEL); + dev = devm_kzalloc(&pdev->dev, sizeof(struct mei_device) + + sizeof(struct mei_me_hw), GFP_KERNEL); if (!dev) return NULL; hw = to_me_hw(dev); diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c index e9f8c0aeec13..24e4a4c96606 100644 --- a/drivers/misc/mei/hw-txe.c +++ b/drivers/misc/mei/hw-txe.c @@ -1057,7 +1057,7 @@ irqreturn_t mei_txe_irq_thread_handler(int irq, void *dev_id) { struct mei_device *dev = (struct mei_device *) dev_id; struct mei_txe_hw *hw = to_txe_hw(dev); - struct mei_cl_cb complete_list; + struct list_head cmpl_list; s32 slots; int rets = 0; @@ -1069,7 +1069,7 @@ irqreturn_t mei_txe_irq_thread_handler(int irq, void *dev_id) /* initialize our complete list */ mutex_lock(&dev->device_lock); - mei_io_list_init(&complete_list); + INIT_LIST_HEAD(&cmpl_list); if (pci_dev_msi_enabled(to_pci_dev(dev->dev))) mei_txe_check_and_ack_intrs(dev, true); @@ -1126,7 +1126,7 @@ irqreturn_t mei_txe_irq_thread_handler(int irq, void *dev_id) slots = mei_count_full_read_slots(dev); if (test_and_clear_bit(TXE_INTR_OUT_DB_BIT, &hw->intr_cause)) { /* Read from TXE */ - rets = mei_irq_read_handler(dev, &complete_list, &slots); + rets = mei_irq_read_handler(dev, &cmpl_list, &slots); if (rets && dev->dev_state != MEI_DEV_RESETTING) { dev_err(dev->dev, "mei_irq_read_handler ret = %d.\n", rets); @@ -1144,14 +1144,14 @@ irqreturn_t mei_txe_irq_thread_handler(int irq, void *dev_id) if (hw->aliveness && dev->hbuf_is_ready) { /* get the real register value */ dev->hbuf_is_ready = mei_hbuf_is_ready(dev); - rets = mei_irq_write_handler(dev, &complete_list); + rets = mei_irq_write_handler(dev, &cmpl_list); if (rets && rets != -EMSGSIZE) dev_err(dev->dev, "mei_irq_write_handler ret = %d.\n", rets); dev->hbuf_is_ready = mei_hbuf_is_ready(dev); } - mei_irq_compl_handler(dev, &complete_list); + mei_irq_compl_handler(dev, &cmpl_list); end: dev_dbg(dev->dev, "interrupt thread end ret = %d\n", rets); @@ -1207,8 +1207,8 @@ struct mei_device *mei_txe_dev_init(struct pci_dev *pdev) struct mei_device *dev; struct mei_txe_hw *hw; - dev = kzalloc(sizeof(struct mei_device) + - sizeof(struct mei_txe_hw), GFP_KERNEL); + dev = devm_kzalloc(&pdev->dev, sizeof(struct mei_device) + + sizeof(struct mei_txe_hw), GFP_KERNEL); if (!dev) return NULL; diff --git a/drivers/misc/mei/hw-txe.h b/drivers/misc/mei/hw-txe.h index ce3ed0b88b0c..e1e8b66d7648 100644 --- a/drivers/misc/mei/hw-txe.h +++ b/drivers/misc/mei/hw-txe.h @@ -45,7 +45,7 @@ * @intr_cause: translated interrupt cause */ struct mei_txe_hw { - void __iomem *mem_addr[NUM_OF_MEM_BARS]; + void __iomem * const *mem_addr; u32 aliveness; u32 readiness; u32 slots; diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 41e5760a6886..cfb1cdf176fa 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -349,16 +349,16 @@ EXPORT_SYMBOL_GPL(mei_stop); bool mei_write_is_idle(struct mei_device *dev) { bool idle = (dev->dev_state == MEI_DEV_ENABLED && - list_empty(&dev->ctrl_wr_list.list) && - list_empty(&dev->write_list.list) && - list_empty(&dev->write_waiting_list.list)); + list_empty(&dev->ctrl_wr_list) && + list_empty(&dev->write_list) && + list_empty(&dev->write_waiting_list)); dev_dbg(dev->dev, "write pg: is idle[%d] state=%s ctrl=%01d write=%01d wwait=%01d\n", idle, mei_dev_state_str(dev->dev_state), - list_empty(&dev->ctrl_wr_list.list), - list_empty(&dev->write_list.list), - list_empty(&dev->write_waiting_list.list)); + list_empty(&dev->ctrl_wr_list), + list_empty(&dev->write_list), + list_empty(&dev->write_waiting_list)); return idle; } @@ -388,17 +388,17 @@ void mei_device_init(struct mei_device *dev, dev->dev_state = MEI_DEV_INITIALIZING; dev->reset_count = 0; - mei_io_list_init(&dev->write_list); - mei_io_list_init(&dev->write_waiting_list); - mei_io_list_init(&dev->ctrl_wr_list); - mei_io_list_init(&dev->ctrl_rd_list); + INIT_LIST_HEAD(&dev->write_list); + INIT_LIST_HEAD(&dev->write_waiting_list); + INIT_LIST_HEAD(&dev->ctrl_wr_list); + INIT_LIST_HEAD(&dev->ctrl_rd_list); INIT_DELAYED_WORK(&dev->timer_work, mei_timer); INIT_WORK(&dev->reset_work, mei_reset_work); INIT_WORK(&dev->bus_rescan_work, mei_cl_bus_rescan_work); INIT_LIST_HEAD(&dev->iamthif_cl.link); - mei_io_list_init(&dev->amthif_cmd_list); + INIT_LIST_HEAD(&dev->amthif_cmd_list); bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX); dev->open_handle_count = 0; diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index b584749bcc4a..406e9e2b2fff 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -35,14 +35,14 @@ * for the completed callbacks * * @dev: mei device - * @compl_list: list of completed cbs + * @cmpl_list: list of completed cbs */ -void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *compl_list) +void mei_irq_compl_handler(struct mei_device *dev, struct list_head *cmpl_list) { struct mei_cl_cb *cb, *next; struct mei_cl *cl; - list_for_each_entry_safe(cb, next, &compl_list->list, list) { + list_for_each_entry_safe(cb, next, cmpl_list, list) { cl = cb->cl; list_del_init(&cb->list); @@ -92,13 +92,13 @@ void mei_irq_discard_msg(struct mei_device *dev, struct mei_msg_hdr *hdr) * * @cl: reading client * @mei_hdr: header of mei client message - * @complete_list: completion list + * @cmpl_list: completion list * * Return: always 0 */ int mei_cl_irq_read_msg(struct mei_cl *cl, struct mei_msg_hdr *mei_hdr, - struct mei_cl_cb *complete_list) + struct list_head *cmpl_list) { struct mei_device *dev = cl->dev; struct mei_cl_cb *cb; @@ -144,7 +144,7 @@ int mei_cl_irq_read_msg(struct mei_cl *cl, if (mei_hdr->msg_complete) { cl_dbg(dev, cl, "completed read length = %zu\n", cb->buf_idx); - list_move_tail(&cb->list, &complete_list->list); + list_move_tail(&cb->list, cmpl_list); } else { pm_runtime_mark_last_busy(dev->dev); pm_request_autosuspend(dev->dev); @@ -154,7 +154,7 @@ int mei_cl_irq_read_msg(struct mei_cl *cl, discard: if (cb) - list_move_tail(&cb->list, &complete_list->list); + list_move_tail(&cb->list, cmpl_list); mei_irq_discard_msg(dev, mei_hdr); return 0; } @@ -169,7 +169,7 @@ discard: * Return: 0, OK; otherwise, error. */ static int mei_cl_irq_disconnect_rsp(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list) + struct list_head *cmpl_list) { struct mei_device *dev = cl->dev; u32 msg_slots; @@ -183,7 +183,7 @@ static int mei_cl_irq_disconnect_rsp(struct mei_cl *cl, struct mei_cl_cb *cb, return -EMSGSIZE; ret = mei_hbm_cl_disconnect_rsp(dev, cl); - list_move_tail(&cb->list, &cmpl_list->list); + list_move_tail(&cb->list, cmpl_list); return ret; } @@ -199,7 +199,7 @@ static int mei_cl_irq_disconnect_rsp(struct mei_cl *cl, struct mei_cl_cb *cb, * Return: 0, OK; otherwise, error. */ static int mei_cl_irq_read(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list) + struct list_head *cmpl_list) { struct mei_device *dev = cl->dev; u32 msg_slots; @@ -219,7 +219,7 @@ static int mei_cl_irq_read(struct mei_cl *cl, struct mei_cl_cb *cb, if (ret) { cl->status = ret; cb->buf_idx = 0; - list_move_tail(&cb->list, &cmpl_list->list); + list_move_tail(&cb->list, cmpl_list); return ret; } @@ -249,7 +249,7 @@ static inline bool hdr_is_fixed(struct mei_msg_hdr *mei_hdr) * Return: 0 on success, <0 on failure. */ int mei_irq_read_handler(struct mei_device *dev, - struct mei_cl_cb *cmpl_list, s32 *slots) + struct list_head *cmpl_list, s32 *slots) { struct mei_msg_hdr *mei_hdr; struct mei_cl *cl; @@ -347,12 +347,11 @@ EXPORT_SYMBOL_GPL(mei_irq_read_handler); * * Return: 0 on success, <0 on failure. */ -int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) +int mei_irq_write_handler(struct mei_device *dev, struct list_head *cmpl_list) { struct mei_cl *cl; struct mei_cl_cb *cb, *next; - struct mei_cl_cb *list; s32 slots; int ret; @@ -367,19 +366,18 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) /* complete all waiting for write CB */ dev_dbg(dev->dev, "complete all waiting for write cb.\n"); - list = &dev->write_waiting_list; - list_for_each_entry_safe(cb, next, &list->list, list) { + list_for_each_entry_safe(cb, next, &dev->write_waiting_list, list) { cl = cb->cl; cl->status = 0; cl_dbg(dev, cl, "MEI WRITE COMPLETE\n"); cl->writing_state = MEI_WRITE_COMPLETE; - list_move_tail(&cb->list, &cmpl_list->list); + list_move_tail(&cb->list, cmpl_list); } /* complete control write list CB */ dev_dbg(dev->dev, "complete control write list cb.\n"); - list_for_each_entry_safe(cb, next, &dev->ctrl_wr_list.list, list) { + list_for_each_entry_safe(cb, next, &dev->ctrl_wr_list, list) { cl = cb->cl; switch (cb->fop_type) { case MEI_FOP_DISCONNECT: @@ -423,7 +421,7 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) } /* complete write list CB */ dev_dbg(dev->dev, "complete write list cb.\n"); - list_for_each_entry_safe(cb, next, &dev->write_list.list, list) { + list_for_each_entry_safe(cb, next, &dev->write_list, list) { cl = cb->cl; if (cl == &dev->iamthif_cl) ret = mei_amthif_irq_write(cl, cb, cmpl_list); diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index e1bf54481fd6..9d0b7050c79a 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -182,32 +182,36 @@ static ssize_t mei_read(struct file *file, char __user *ubuf, goto out; } - if (rets == -EBUSY && - !mei_cl_enqueue_ctrl_wr_cb(cl, length, MEI_FOP_READ, file)) { - rets = -ENOMEM; - goto out; - } - do { - mutex_unlock(&dev->device_lock); - - if (wait_event_interruptible(cl->rx_wait, - (!list_empty(&cl->rd_completed)) || - (!mei_cl_is_connected(cl)))) { +again: + mutex_unlock(&dev->device_lock); + if (wait_event_interruptible(cl->rx_wait, + !list_empty(&cl->rd_completed) || + !mei_cl_is_connected(cl))) { + if (signal_pending(current)) + return -EINTR; + return -ERESTARTSYS; + } + mutex_lock(&dev->device_lock); - if (signal_pending(current)) - return -EINTR; - return -ERESTARTSYS; - } + if (!mei_cl_is_connected(cl)) { + rets = -ENODEV; + goto out; + } - mutex_lock(&dev->device_lock); - if (!mei_cl_is_connected(cl)) { - rets = -ENODEV; - goto out; - } + cb = mei_cl_read_cb(cl, file); + if (!cb) { + /* + * For amthif all the waiters are woken up, + * but only fp with matching cb->fp get the cb, + * the others have to return to wait on read. + */ + if (cl == &dev->iamthif_cl) + goto again; - cb = mei_cl_read_cb(cl, file); - } while (!cb); + rets = 0; + goto out; + } copy_buffer: /* now copy the data to user space */ diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 8dadb98662a9..d41aac53a2ac 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -328,6 +328,8 @@ ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length, bool mei_cl_bus_rx_event(struct mei_cl *cl); bool mei_cl_bus_notify_event(struct mei_cl *cl); void mei_cl_bus_remove_devices(struct mei_device *bus); +bool mei_cl_bus_module_get(struct mei_cl *cl); +void mei_cl_bus_module_put(struct mei_cl *cl); int mei_cl_bus_init(void); void mei_cl_bus_exit(void); @@ -439,10 +441,10 @@ struct mei_device { struct cdev cdev; int minor; - struct mei_cl_cb write_list; - struct mei_cl_cb write_waiting_list; - struct mei_cl_cb ctrl_wr_list; - struct mei_cl_cb ctrl_rd_list; + struct list_head write_list; + struct list_head write_waiting_list; + struct list_head ctrl_wr_list; + struct list_head ctrl_rd_list; struct list_head file_list; long open_handle_count; @@ -499,7 +501,7 @@ struct mei_device { bool override_fixed_address; /* amthif list for cmd waiting */ - struct mei_cl_cb amthif_cmd_list; + struct list_head amthif_cmd_list; struct mei_cl iamthif_cl; long iamthif_open_count; u32 iamthif_stall_timer; @@ -571,10 +573,10 @@ void mei_cancel_work(struct mei_device *dev); void mei_timer(struct work_struct *work); void mei_schedule_stall_timer(struct mei_device *dev); int mei_irq_read_handler(struct mei_device *dev, - struct mei_cl_cb *cmpl_list, s32 *slots); + struct list_head *cmpl_list, s32 *slots); -int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list); -void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list); +int mei_irq_write_handler(struct mei_device *dev, struct list_head *cmpl_list); +void mei_irq_compl_handler(struct mei_device *dev, struct list_head *cmpl_list); /* * AMTHIF - AMT Host Interface Functions @@ -590,12 +592,12 @@ int mei_amthif_release(struct mei_device *dev, struct file *file); int mei_amthif_write(struct mei_cl *cl, struct mei_cl_cb *cb); int mei_amthif_run_next_cmd(struct mei_device *dev); int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list); + struct list_head *cmpl_list); void mei_amthif_complete(struct mei_cl *cl, struct mei_cl_cb *cb); int mei_amthif_irq_read_msg(struct mei_cl *cl, struct mei_msg_hdr *mei_hdr, - struct mei_cl_cb *complete_list); + struct list_head *cmpl_list); int mei_amthif_irq_read(struct mei_device *dev, s32 *slots); /* diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c index f9c6ec4b98ab..0a668fdfbbe9 100644 --- a/drivers/misc/mei/pci-me.c +++ b/drivers/misc/mei/pci-me.c @@ -149,18 +149,18 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) return -ENODEV; /* enable pci dev */ - err = pci_enable_device(pdev); + err = pcim_enable_device(pdev); if (err) { dev_err(&pdev->dev, "failed to enable pci device.\n"); goto end; } /* set PCI host mastering */ pci_set_master(pdev); - /* pci request regions for mei driver */ - err = pci_request_regions(pdev, KBUILD_MODNAME); + /* pci request regions and mapping IO device memory for mei driver */ + err = pcim_iomap_regions(pdev, BIT(0), KBUILD_MODNAME); if (err) { dev_err(&pdev->dev, "failed to get pci regions.\n"); - goto disable_device; + goto end; } if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) || @@ -173,24 +173,18 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) } if (err) { dev_err(&pdev->dev, "No usable DMA configuration, aborting\n"); - goto release_regions; + goto end; } - /* allocates and initializes the mei dev structure */ dev = mei_me_dev_init(pdev, cfg); if (!dev) { err = -ENOMEM; - goto release_regions; + goto end; } hw = to_me_hw(dev); - /* mapping IO device memory */ - hw->mem_addr = pci_iomap(pdev, 0, 0); - if (!hw->mem_addr) { - dev_err(&pdev->dev, "mapping I/O device memory failure.\n"); - err = -ENOMEM; - goto free_device; - } + hw->mem_addr = pcim_iomap_table(pdev)[0]; + pci_enable_msi(pdev); /* request and enable interrupt */ @@ -203,7 +197,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (err) { dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n", pdev->irq); - goto disable_msi; + goto end; } if (mei_start(dev)) { @@ -242,15 +236,6 @@ release_irq: mei_cancel_work(dev); mei_disable_interrupts(dev); free_irq(pdev->irq, dev); -disable_msi: - pci_disable_msi(pdev); - pci_iounmap(pdev, hw->mem_addr); -free_device: - kfree(dev); -release_regions: - pci_release_regions(pdev); -disable_device: - pci_disable_device(pdev); end: dev_err(&pdev->dev, "initialization failed.\n"); return err; @@ -267,7 +252,6 @@ end: static void mei_me_remove(struct pci_dev *pdev) { struct mei_device *dev; - struct mei_me_hw *hw; dev = pci_get_drvdata(pdev); if (!dev) @@ -276,33 +260,19 @@ static void mei_me_remove(struct pci_dev *pdev) if (mei_pg_is_enabled(dev)) pm_runtime_get_noresume(&pdev->dev); - hw = to_me_hw(dev); - - dev_dbg(&pdev->dev, "stop\n"); mei_stop(dev); if (!pci_dev_run_wake(pdev)) mei_me_unset_pm_domain(dev); - /* disable interrupts */ mei_disable_interrupts(dev); free_irq(pdev->irq, dev); - pci_disable_msi(pdev); - - if (hw->mem_addr) - pci_iounmap(pdev, hw->mem_addr); mei_deregister(dev); - - kfree(dev); - - pci_release_regions(pdev); - pci_disable_device(pdev); - - } + #ifdef CONFIG_PM_SLEEP static int mei_me_pci_suspend(struct device *device) { diff --git a/drivers/misc/mei/pci-txe.c b/drivers/misc/mei/pci-txe.c index 58ffd30dcc91..fe088b40daf9 100644 --- a/drivers/misc/mei/pci-txe.c +++ b/drivers/misc/mei/pci-txe.c @@ -52,17 +52,6 @@ static inline void mei_txe_set_pm_domain(struct mei_device *dev) {} static inline void mei_txe_unset_pm_domain(struct mei_device *dev) {} #endif /* CONFIG_PM */ -static void mei_txe_pci_iounmap(struct pci_dev *pdev, struct mei_txe_hw *hw) -{ - int i; - - for (i = SEC_BAR; i < NUM_OF_MEM_BARS; i++) { - if (hw->mem_addr[i]) { - pci_iounmap(pdev, hw->mem_addr[i]); - hw->mem_addr[i] = NULL; - } - } -} /** * mei_txe_probe - Device Initialization Routine * @@ -75,22 +64,22 @@ static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct mei_device *dev; struct mei_txe_hw *hw; + const int mask = BIT(SEC_BAR) | BIT(BRIDGE_BAR); int err; - int i; /* enable pci dev */ - err = pci_enable_device(pdev); + err = pcim_enable_device(pdev); if (err) { dev_err(&pdev->dev, "failed to enable pci device.\n"); goto end; } /* set PCI host mastering */ pci_set_master(pdev); - /* pci request regions for mei driver */ - err = pci_request_regions(pdev, KBUILD_MODNAME); + /* pci request regions and mapping IO device memory for mei driver */ + err = pcim_iomap_regions(pdev, mask, KBUILD_MODNAME); if (err) { dev_err(&pdev->dev, "failed to get pci regions.\n"); - goto disable_device; + goto end; } err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36)); @@ -98,7 +87,7 @@ static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent) err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (err) { dev_err(&pdev->dev, "No suitable DMA available.\n"); - goto release_regions; + goto end; } } @@ -106,20 +95,10 @@ static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent) dev = mei_txe_dev_init(pdev); if (!dev) { err = -ENOMEM; - goto release_regions; + goto end; } hw = to_txe_hw(dev); - - /* mapping IO device memory */ - for (i = SEC_BAR; i < NUM_OF_MEM_BARS; i++) { - hw->mem_addr[i] = pci_iomap(pdev, i, 0); - if (!hw->mem_addr[i]) { - dev_err(&pdev->dev, "mapping I/O device memory failure.\n"); - err = -ENOMEM; - goto free_device; - } - } - + hw->mem_addr = pcim_iomap_table(pdev); pci_enable_msi(pdev); @@ -140,7 +119,7 @@ static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (err) { dev_err(&pdev->dev, "mei: request_threaded_irq failure. irq = %d\n", pdev->irq); - goto free_device; + goto end; } if (mei_start(dev)) { @@ -173,23 +152,9 @@ static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent) stop: mei_stop(dev); release_irq: - mei_cancel_work(dev); - - /* disable interrupts */ mei_disable_interrupts(dev); - free_irq(pdev->irq, dev); - pci_disable_msi(pdev); - -free_device: - mei_txe_pci_iounmap(pdev, hw); - - kfree(dev); -release_regions: - pci_release_regions(pdev); -disable_device: - pci_disable_device(pdev); end: dev_err(&pdev->dev, "initialization failed.\n"); return err; @@ -206,38 +171,24 @@ end: static void mei_txe_remove(struct pci_dev *pdev) { struct mei_device *dev; - struct mei_txe_hw *hw; dev = pci_get_drvdata(pdev); if (!dev) { - dev_err(&pdev->dev, "mei: dev =NULL\n"); + dev_err(&pdev->dev, "mei: dev == NULL\n"); return; } pm_runtime_get_noresume(&pdev->dev); - hw = to_txe_hw(dev); - mei_stop(dev); if (!pci_dev_run_wake(pdev)) mei_txe_unset_pm_domain(dev); - /* disable interrupts */ mei_disable_interrupts(dev); free_irq(pdev->irq, dev); - pci_disable_msi(pdev); - - pci_set_drvdata(pdev, NULL); - - mei_txe_pci_iounmap(pdev, hw); mei_deregister(dev); - - kfree(dev); - - pci_release_regions(pdev); - pci_disable_device(pdev); } diff --git a/drivers/misc/mic/vop/vop_vringh.c b/drivers/misc/mic/vop/vop_vringh.c index 88e45234d527..fed992e2c258 100644 --- a/drivers/misc/mic/vop/vop_vringh.c +++ b/drivers/misc/mic/vop/vop_vringh.c @@ -292,7 +292,6 @@ static int vop_virtio_add_device(struct vop_vdev *vdev, if (ret) { dev_err(vop_dev(vdev), "%s %d err %d\n", __func__, __LINE__, ret); - kfree(vdev); return ret; } diff --git a/drivers/misc/panel.c b/drivers/misc/panel.c index 6030ac5b8c63..ef2ece0f26af 100644 --- a/drivers/misc/panel.c +++ b/drivers/misc/panel.c @@ -56,6 +56,7 @@ #include <linux/list.h> #include <linux/notifier.h> #include <linux/reboot.h> +#include <linux/workqueue.h> #include <generated/utsrelease.h> #include <linux/io.h> @@ -64,8 +65,6 @@ #define LCD_MINOR 156 #define KEYPAD_MINOR 185 -#define PANEL_VERSION "0.9.5" - #define LCD_MAXBYTES 256 /* max burst write */ #define KEYPAD_BUFFER 64 @@ -77,8 +76,8 @@ /* a key repeats this times INPUT_POLL_TIME */ #define KEYPAD_REP_DELAY (2) -/* keep the light on this times INPUT_POLL_TIME for each flash */ -#define FLASH_LIGHT_TEMPO (200) +/* keep the light on this many seconds for each flash */ +#define FLASH_LIGHT_TEMPO (4) /* converts an r_str() input to an active high, bits string : 000BAOSE */ #define PNL_PINPUT(a) ((((unsigned char)(a)) ^ 0x7F) >> 3) @@ -121,8 +120,6 @@ #define PIN_SELECP 17 #define PIN_NOT_SET 127 -#define LCD_FLAG_S 0x0001 -#define LCD_FLAG_ID 0x0002 #define LCD_FLAG_B 0x0004 /* blink on */ #define LCD_FLAG_C 0x0008 /* cursor on */ #define LCD_FLAG_D 0x0010 /* display on */ @@ -256,7 +253,10 @@ static struct { int hwidth; int charset; int proto; - int light_tempo; + + struct delayed_work bl_work; + struct mutex bl_tempo_lock; /* Protects access to bl_tempo */ + bool bl_tempo; /* TODO: use union here? */ struct { @@ -661,8 +661,6 @@ static void lcd_get_bits(unsigned int port, int *val) } } -static void init_scan_timer(void); - /* sets data port bits according to current signals values */ static int set_data_bits(void) { @@ -794,11 +792,8 @@ static void lcd_send_serial(int byte) } /* turn the backlight on or off */ -static void lcd_backlight(int on) +static void __lcd_backlight(int on) { - if (lcd.pins.bl == PIN_NONE) - return; - /* The backlight is activated by setting the AUTOFEED line to +5V */ spin_lock_irq(&pprt_lock); if (on) @@ -809,6 +804,44 @@ static void lcd_backlight(int on) spin_unlock_irq(&pprt_lock); } +static void lcd_backlight(int on) +{ + if (lcd.pins.bl == PIN_NONE) + return; + + mutex_lock(&lcd.bl_tempo_lock); + if (!lcd.bl_tempo) + __lcd_backlight(on); + mutex_unlock(&lcd.bl_tempo_lock); +} + +static void lcd_bl_off(struct work_struct *work) +{ + mutex_lock(&lcd.bl_tempo_lock); + if (lcd.bl_tempo) { + lcd.bl_tempo = false; + if (!(lcd.flags & LCD_FLAG_L)) + __lcd_backlight(0); + } + mutex_unlock(&lcd.bl_tempo_lock); +} + +/* turn the backlight on for a little while */ +static void lcd_poke(void) +{ + if (lcd.pins.bl == PIN_NONE) + return; + + cancel_delayed_work_sync(&lcd.bl_work); + + mutex_lock(&lcd.bl_tempo_lock); + if (!lcd.bl_tempo && !(lcd.flags & LCD_FLAG_L)) + __lcd_backlight(1); + lcd.bl_tempo = true; + schedule_delayed_work(&lcd.bl_work, FLASH_LIGHT_TEMPO * HZ); + mutex_unlock(&lcd.bl_tempo_lock); +} + /* send a command to the LCD panel in serial mode */ static void lcd_write_cmd_s(int cmd) { @@ -907,6 +940,13 @@ static void lcd_gotoxy(void) (lcd.hwidth - 1) : lcd.bwidth - 1)); } +static void lcd_home(void) +{ + lcd.addr.x = 0; + lcd.addr.y = 0; + lcd_gotoxy(); +} + static void lcd_print(char c) { if (lcd.addr.x < lcd.bwidth) { @@ -925,9 +965,7 @@ static void lcd_clear_fast_s(void) { int pos; - lcd.addr.x = 0; - lcd.addr.y = 0; - lcd_gotoxy(); + lcd_home(); spin_lock_irq(&pprt_lock); for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) { @@ -939,9 +977,7 @@ static void lcd_clear_fast_s(void) } spin_unlock_irq(&pprt_lock); - lcd.addr.x = 0; - lcd.addr.y = 0; - lcd_gotoxy(); + lcd_home(); } /* fills the display with spaces and resets X/Y */ @@ -949,9 +985,7 @@ static void lcd_clear_fast_p8(void) { int pos; - lcd.addr.x = 0; - lcd.addr.y = 0; - lcd_gotoxy(); + lcd_home(); spin_lock_irq(&pprt_lock); for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) { @@ -977,9 +1011,7 @@ static void lcd_clear_fast_p8(void) } spin_unlock_irq(&pprt_lock); - lcd.addr.x = 0; - lcd.addr.y = 0; - lcd_gotoxy(); + lcd_home(); } /* fills the display with spaces and resets X/Y */ @@ -987,9 +1019,7 @@ static void lcd_clear_fast_tilcd(void) { int pos; - lcd.addr.x = 0; - lcd.addr.y = 0; - lcd_gotoxy(); + lcd_home(); spin_lock_irq(&pprt_lock); for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) { @@ -1000,9 +1030,7 @@ static void lcd_clear_fast_tilcd(void) spin_unlock_irq(&pprt_lock); - lcd.addr.x = 0; - lcd.addr.y = 0; - lcd_gotoxy(); + lcd_home(); } /* clears the display and resets X/Y */ @@ -1108,13 +1136,8 @@ static inline int handle_lcd_special_code(void) processed = 1; break; case '*': - /* flash back light using the keypad timer */ - if (scan_timer.function) { - if (lcd.light_tempo == 0 && - ((lcd.flags & LCD_FLAG_L) == 0)) - lcd_backlight(1); - lcd.light_tempo = FLASH_LIGHT_TEMPO; - } + /* flash back light */ + lcd_poke(); processed = 1; break; case 'f': /* Small Font */ @@ -1278,21 +1301,14 @@ static inline int handle_lcd_special_code(void) lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS | ((lcd.flags & LCD_FLAG_F) - ? LCD_CMD_TWO_LINES : 0) - | ((lcd.flags & LCD_FLAG_N) ? LCD_CMD_FONT_5X10_DOTS + : 0) + | ((lcd.flags & LCD_FLAG_N) + ? LCD_CMD_TWO_LINES : 0)); /* check whether L flag was changed */ - else if ((oldflags ^ lcd.flags) & (LCD_FLAG_L)) { - if (lcd.flags & (LCD_FLAG_L)) - lcd_backlight(1); - else if (lcd.light_tempo == 0) - /* - * switch off the light only when the tempo - * lighting is gone - */ - lcd_backlight(0); - } + else if ((oldflags ^ lcd.flags) & (LCD_FLAG_L)) + lcd_backlight(!!(lcd.flags & LCD_FLAG_L)); } return processed; @@ -1376,9 +1392,7 @@ static void lcd_write_char(char c) processed = 1; } else if (!strcmp(lcd.esc_seq.buf, "[H")) { /* cursor to home */ - lcd.addr.x = 0; - lcd.addr.y = 0; - lcd_gotoxy(); + lcd_home(); processed = 1; } /* codes starting with ^[[L */ @@ -1625,8 +1639,10 @@ static void lcd_init(void) else lcd_char_conv = NULL; - if (lcd.pins.bl != PIN_NONE) - init_scan_timer(); + if (lcd.pins.bl != PIN_NONE) { + mutex_init(&lcd.bl_tempo_lock); + INIT_DELAYED_WORK(&lcd.bl_work, lcd_bl_off); + } pin_to_bits(lcd.pins.e, lcd_bits[LCD_PORT_D][LCD_BIT_E], lcd_bits[LCD_PORT_C][LCD_BIT_E]); @@ -1655,14 +1671,11 @@ static void lcd_init(void) panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE); #endif #else - panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE "\nPanel-" - PANEL_VERSION); + panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE); #endif - lcd.addr.x = 0; - lcd.addr.y = 0; /* clear the display on the next device opening */ lcd.must_clear = true; - lcd_gotoxy(); + lcd_home(); } /* @@ -1997,19 +2010,8 @@ static void panel_scan_timer(void) panel_process_inputs(); } - if (lcd.enabled && lcd.initialized) { - if (keypressed) { - if (lcd.light_tempo == 0 && - ((lcd.flags & LCD_FLAG_L) == 0)) - lcd_backlight(1); - lcd.light_tempo = FLASH_LIGHT_TEMPO; - } else if (lcd.light_tempo > 0) { - lcd.light_tempo--; - if (lcd.light_tempo == 0 && - ((lcd.flags & LCD_FLAG_L) == 0)) - lcd_backlight(0); - } - } + if (keypressed && lcd.enabled && lcd.initialized) + lcd_poke(); mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME); } @@ -2270,25 +2272,26 @@ static void panel_detach(struct parport *port) if (scan_timer.function) del_timer_sync(&scan_timer); - if (pprt) { - if (keypad.enabled) { - misc_deregister(&keypad_dev); - keypad_initialized = 0; - } + if (keypad.enabled) { + misc_deregister(&keypad_dev); + keypad_initialized = 0; + } - if (lcd.enabled) { - panel_lcd_print("\x0cLCD driver " PANEL_VERSION - "\nunloaded.\x1b[Lc\x1b[Lb\x1b[L-"); - misc_deregister(&lcd_dev); - lcd.initialized = false; + if (lcd.enabled) { + panel_lcd_print("\x0cLCD driver unloaded.\x1b[Lc\x1b[Lb\x1b[L-"); + misc_deregister(&lcd_dev); + if (lcd.pins.bl != PIN_NONE) { + cancel_delayed_work_sync(&lcd.bl_work); + __lcd_backlight(0); } - - /* TODO: free all input signals */ - parport_release(pprt); - parport_unregister_device(pprt); - pprt = NULL; - unregister_reboot_notifier(&panel_notifier); + lcd.initialized = false; } + + /* TODO: free all input signals */ + parport_release(pprt); + parport_unregister_device(pprt); + pprt = NULL; + unregister_reboot_notifier(&panel_notifier); } static struct parport_driver panel_driver = { @@ -2400,7 +2403,7 @@ static int __init panel_init_module(void) if (!lcd.enabled && !keypad.enabled) { /* no device enabled, let's exit */ - pr_err("driver version " PANEL_VERSION " disabled.\n"); + pr_err("panel driver disabled.\n"); return -ENODEV; } @@ -2411,12 +2414,10 @@ static int __init panel_init_module(void) } if (pprt) - pr_info("driver version " PANEL_VERSION - " registered on parport%d (io=0x%lx).\n", parport, - pprt->port->base); + pr_info("panel driver registered on parport%d (io=0x%lx).\n", + parport, pprt->port->base); else - pr_info("driver version " PANEL_VERSION - " not yet registered\n"); + pr_info("panel driver not yet registered\n"); return 0; } diff --git a/drivers/misc/sram-exec.c b/drivers/misc/sram-exec.c new file mode 100644 index 000000000000..ac522417c462 --- /dev/null +++ b/drivers/misc/sram-exec.c @@ -0,0 +1,105 @@ +/* + * SRAM protect-exec region helper functions + * + * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ + * Dave Gerlach + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/device.h> +#include <linux/genalloc.h> +#include <linux/sram.h> + +#include <asm/cacheflush.h> + +#include "sram.h" + +static DEFINE_MUTEX(exec_pool_list_mutex); +static LIST_HEAD(exec_pool_list); + +int sram_check_protect_exec(struct sram_dev *sram, struct sram_reserve *block, + struct sram_partition *part) +{ + unsigned long base = (unsigned long)part->base; + unsigned long end = base + block->size; + + if (!PAGE_ALIGNED(base) || !PAGE_ALIGNED(end)) { + dev_err(sram->dev, + "SRAM pool marked with 'protect-exec' is not page aligned and will not be created.\n"); + return -ENOMEM; + } + + return 0; +} + +int sram_add_protect_exec(struct sram_partition *part) +{ + mutex_lock(&exec_pool_list_mutex); + list_add_tail(&part->list, &exec_pool_list); + mutex_unlock(&exec_pool_list_mutex); + + return 0; +} + +/** + * sram_exec_copy - copy data to a protected executable region of sram + * + * @pool: struct gen_pool retrieved that is part of this sram + * @dst: Destination address for the copy, that must be inside pool + * @src: Source address for the data to copy + * @size: Size of copy to perform, which starting from dst, must reside in pool + * + * This helper function allows sram driver to act as central control location + * of 'protect-exec' pools which are normal sram pools but are always set + * read-only and executable except when copying data to them, at which point + * they are set to read-write non-executable, to make sure no memory is + * writeable and executable at the same time. This region must be page-aligned + * and is checked during probe, otherwise page attribute manipulation would + * not be possible. + */ +int sram_exec_copy(struct gen_pool *pool, void *dst, void *src, + size_t size) +{ + struct sram_partition *part = NULL, *p; + unsigned long base; + int pages; + + mutex_lock(&exec_pool_list_mutex); + list_for_each_entry(p, &exec_pool_list, list) { + if (p->pool == pool) + part = p; + } + mutex_unlock(&exec_pool_list_mutex); + + if (!part) + return -EINVAL; + + if (!addr_in_gen_pool(pool, (unsigned long)dst, size)) + return -EINVAL; + + base = (unsigned long)part->base; + pages = PAGE_ALIGN(size) / PAGE_SIZE; + + mutex_lock(&part->lock); + + set_memory_nx((unsigned long)base, pages); + set_memory_rw((unsigned long)base, pages); + + memcpy(dst, src, size); + + set_memory_ro((unsigned long)base, pages); + set_memory_x((unsigned long)base, pages); + + mutex_unlock(&part->lock); + + return 0; +} +EXPORT_SYMBOL_GPL(sram_exec_copy); diff --git a/drivers/misc/sram.c b/drivers/misc/sram.c index b33ab8ce47ab..d1185b78cf9a 100644 --- a/drivers/misc/sram.c +++ b/drivers/misc/sram.c @@ -31,35 +31,9 @@ #include <linux/mfd/syscon.h> #include <soc/at91/atmel-secumod.h> -#define SRAM_GRANULARITY 32 - -struct sram_partition { - void __iomem *base; - - struct gen_pool *pool; - struct bin_attribute battr; - struct mutex lock; -}; - -struct sram_dev { - struct device *dev; - void __iomem *virt_base; - - struct gen_pool *pool; - struct clk *clk; +#include "sram.h" - struct sram_partition *partition; - u32 partitions; -}; - -struct sram_reserve { - struct list_head list; - u32 start; - u32 size; - bool export; - bool pool; - const char *label; -}; +#define SRAM_GRANULARITY 32 static ssize_t sram_read(struct file *filp, struct kobject *kobj, struct bin_attribute *attr, @@ -148,6 +122,18 @@ static int sram_add_partition(struct sram_dev *sram, struct sram_reserve *block, if (ret) return ret; } + if (block->protect_exec) { + ret = sram_check_protect_exec(sram, block, part); + if (ret) + return ret; + + ret = sram_add_pool(sram, block, start, part); + if (ret) + return ret; + + sram_add_protect_exec(part); + } + sram->partitions++; return 0; @@ -233,7 +219,11 @@ static int sram_reserve_regions(struct sram_dev *sram, struct resource *res) if (of_find_property(child, "pool", NULL)) block->pool = true; - if ((block->export || block->pool) && block->size) { + if (of_find_property(child, "protect-exec", NULL)) + block->protect_exec = true; + + if ((block->export || block->pool || block->protect_exec) && + block->size) { exports++; label = NULL; @@ -249,8 +239,10 @@ static int sram_reserve_regions(struct sram_dev *sram, struct resource *res) block->label = devm_kstrdup(sram->dev, label, GFP_KERNEL); - if (!block->label) + if (!block->label) { + ret = -ENOMEM; goto err_chunks; + } dev_dbg(sram->dev, "found %sblock '%s' 0x%x-0x%x\n", block->export ? "exported " : "", block->label, @@ -293,7 +285,8 @@ static int sram_reserve_regions(struct sram_dev *sram, struct resource *res) goto err_chunks; } - if ((block->export || block->pool) && block->size) { + if ((block->export || block->pool || block->protect_exec) && + block->size) { ret = sram_add_partition(sram, block, res->start + block->start); if (ret) { diff --git a/drivers/misc/sram.h b/drivers/misc/sram.h new file mode 100644 index 000000000000..c181ce4c8fca --- /dev/null +++ b/drivers/misc/sram.h @@ -0,0 +1,58 @@ +/* + * Defines for the SRAM driver + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __SRAM_H +#define __SRAM_H + +struct sram_partition { + void __iomem *base; + + struct gen_pool *pool; + struct bin_attribute battr; + struct mutex lock; + struct list_head list; +}; + +struct sram_dev { + struct device *dev; + void __iomem *virt_base; + + struct gen_pool *pool; + struct clk *clk; + + struct sram_partition *partition; + u32 partitions; +}; + +struct sram_reserve { + struct list_head list; + u32 start; + u32 size; + bool export; + bool pool; + bool protect_exec; + const char *label; +}; + +#ifdef CONFIG_SRAM_EXEC +int sram_check_protect_exec(struct sram_dev *sram, struct sram_reserve *block, + struct sram_partition *part); +int sram_add_protect_exec(struct sram_partition *part); +#else +static inline int sram_check_protect_exec(struct sram_dev *sram, + struct sram_reserve *block, + struct sram_partition *part) +{ + return -ENODEV; +} + +static inline int sram_add_protect_exec(struct sram_partition *part) +{ + return -ENODEV; +} +#endif /* CONFIG_SRAM_EXEC */ +#endif /* __SRAM_H */ diff --git a/drivers/misc/vmw_vmci/vmci_guest.c b/drivers/misc/vmw_vmci/vmci_guest.c index 189b32519748..9d659542a335 100644 --- a/drivers/misc/vmw_vmci/vmci_guest.c +++ b/drivers/misc/vmw_vmci/vmci_guest.c @@ -54,10 +54,7 @@ struct vmci_guest_device { struct device *dev; /* PCI device we are attached to */ void __iomem *iobase; - unsigned int irq; - unsigned int intr_type; bool exclusive_vectors; - struct msix_entry msix_entries[VMCI_MAX_INTRS]; struct tasklet_struct datagram_tasklet; struct tasklet_struct bm_tasklet; @@ -369,30 +366,6 @@ static void vmci_process_bitmap(unsigned long data) } /* - * Enable MSI-X. Try exclusive vectors first, then shared vectors. - */ -static int vmci_enable_msix(struct pci_dev *pdev, - struct vmci_guest_device *vmci_dev) -{ - int i; - int result; - - for (i = 0; i < VMCI_MAX_INTRS; ++i) { - vmci_dev->msix_entries[i].entry = i; - vmci_dev->msix_entries[i].vector = i; - } - - result = pci_enable_msix_exact(pdev, - vmci_dev->msix_entries, VMCI_MAX_INTRS); - if (result == 0) - vmci_dev->exclusive_vectors = true; - else if (result == -ENOSPC) - result = pci_enable_msix_exact(pdev, vmci_dev->msix_entries, 1); - - return result; -} - -/* * Interrupt handler for legacy or MSI interrupt, or for first MSI-X * interrupt (vector VMCI_INTR_DATAGRAM). */ @@ -406,7 +379,7 @@ static irqreturn_t vmci_interrupt(int irq, void *_dev) * Otherwise we must read the ICR to determine what to do. */ - if (dev->intr_type == VMCI_INTR_TYPE_MSIX && dev->exclusive_vectors) { + if (dev->exclusive_vectors) { tasklet_schedule(&dev->datagram_tasklet); } else { unsigned int icr; @@ -491,7 +464,6 @@ static int vmci_guest_probe_device(struct pci_dev *pdev, } vmci_dev->dev = &pdev->dev; - vmci_dev->intr_type = VMCI_INTR_TYPE_INTX; vmci_dev->exclusive_vectors = false; vmci_dev->iobase = iobase; @@ -592,26 +564,26 @@ static int vmci_guest_probe_device(struct pci_dev *pdev, * Enable interrupts. Try MSI-X first, then MSI, and then fallback on * legacy interrupts. */ - if (!vmci_disable_msix && !vmci_enable_msix(pdev, vmci_dev)) { - vmci_dev->intr_type = VMCI_INTR_TYPE_MSIX; - vmci_dev->irq = vmci_dev->msix_entries[0].vector; - } else if (!vmci_disable_msi && !pci_enable_msi(pdev)) { - vmci_dev->intr_type = VMCI_INTR_TYPE_MSI; - vmci_dev->irq = pdev->irq; + error = pci_alloc_irq_vectors(pdev, VMCI_MAX_INTRS, VMCI_MAX_INTRS, + PCI_IRQ_MSIX); + if (error) { + error = pci_alloc_irq_vectors(pdev, 1, 1, + PCI_IRQ_MSIX | PCI_IRQ_MSI | PCI_IRQ_LEGACY); + if (error) + goto err_remove_bitmap; } else { - vmci_dev->intr_type = VMCI_INTR_TYPE_INTX; - vmci_dev->irq = pdev->irq; + vmci_dev->exclusive_vectors = true; } /* * Request IRQ for legacy or MSI interrupts, or for first * MSI-X vector. */ - error = request_irq(vmci_dev->irq, vmci_interrupt, IRQF_SHARED, - KBUILD_MODNAME, vmci_dev); + error = request_irq(pci_irq_vector(pdev, 0), vmci_interrupt, + IRQF_SHARED, KBUILD_MODNAME, vmci_dev); if (error) { dev_err(&pdev->dev, "Irq %u in use: %d\n", - vmci_dev->irq, error); + pci_irq_vector(pdev, 0), error); goto err_disable_msi; } @@ -622,13 +594,13 @@ static int vmci_guest_probe_device(struct pci_dev *pdev, * between the vectors. */ if (vmci_dev->exclusive_vectors) { - error = request_irq(vmci_dev->msix_entries[1].vector, + error = request_irq(pci_irq_vector(pdev, 1), vmci_interrupt_bm, 0, KBUILD_MODNAME, vmci_dev); if (error) { dev_err(&pdev->dev, "Failed to allocate irq %u: %d\n", - vmci_dev->msix_entries[1].vector, error); + pci_irq_vector(pdev, 1), error); goto err_free_irq; } } @@ -651,15 +623,12 @@ static int vmci_guest_probe_device(struct pci_dev *pdev, return 0; err_free_irq: - free_irq(vmci_dev->irq, vmci_dev); + free_irq(pci_irq_vector(pdev, 0), vmci_dev); tasklet_kill(&vmci_dev->datagram_tasklet); tasklet_kill(&vmci_dev->bm_tasklet); err_disable_msi: - if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSIX) - pci_disable_msix(pdev); - else if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSI) - pci_disable_msi(pdev); + pci_free_irq_vectors(pdev); vmci_err = vmci_event_unsubscribe(ctx_update_sub_id); if (vmci_err < VMCI_SUCCESS) @@ -719,14 +688,10 @@ static void vmci_guest_remove_device(struct pci_dev *pdev) * MSI-X, we might have multiple vectors, each with their own * IRQ, which we must free too. */ - free_irq(vmci_dev->irq, vmci_dev); - if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSIX) { - if (vmci_dev->exclusive_vectors) - free_irq(vmci_dev->msix_entries[1].vector, vmci_dev); - pci_disable_msix(pdev); - } else if (vmci_dev->intr_type == VMCI_INTR_TYPE_MSI) { - pci_disable_msi(pdev); - } + if (vmci_dev->exclusive_vectors) + free_irq(pci_irq_vector(pdev, 1), vmci_dev); + free_irq(pci_irq_vector(pdev, 0), vmci_dev); + pci_free_irq_vectors(pdev); tasklet_kill(&vmci_dev->datagram_tasklet); tasklet_kill(&vmci_dev->bm_tasklet); |