Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756095Ab0AVRud (ORCPT ); Fri, 22 Jan 2010 12:50:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756028Ab0AVRu2 (ORCPT ); Fri, 22 Jan 2010 12:50:28 -0500 Received: from mga09.intel.com ([134.134.136.24]:20038 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756072Ab0AVRuY (ORCPT ); Fri, 22 Jan 2010 12:50:24 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.49,324,1262592000"; d="scan'208";a="589576134" From: Mark Allyn To: linux-kernel@vger.kernel.org, greg@kroah.com, alan@linux.intel.com, charles.f.johnson@intel.com Cc: Mark Allyn Subject: [PATCH] Patch 2 of 5 for rar_register - renaming directory to rar_register Date: Fri, 22 Jan 2010 09:54:12 -0800 Message-Id: <1264182852-29009-1-git-send-email-mark.a.allyn@intel.com> X-Mailer: git-send-email 1.6.0.6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 33155 Lines: 1201 Signed-off-by: Mark Allyn --- drivers/staging/Kconfig | 2 +- drivers/staging/Makefile | 2 +- drivers/staging/rar/Kconfig | 17 - drivers/staging/rar/Makefile | 2 - drivers/staging/rar/rar_register.c | 440 --------------------------- drivers/staging/rar/rar_register.h | 89 ------ drivers/staging/rar_register/Kconfig | 17 + drivers/staging/rar_register/Makefile | 2 + drivers/staging/rar_register/rar_register.c | 440 +++++++++++++++++++++++++++ drivers/staging/rar_register/rar_register.h | 89 ++++++ 10 files changed, 550 insertions(+), 550 deletions(-) delete mode 100644 drivers/staging/rar/Kconfig delete mode 100644 drivers/staging/rar/Makefile delete mode 100644 drivers/staging/rar/rar_register.c delete mode 100644 drivers/staging/rar/rar_register.h create mode 100644 drivers/staging/rar_register/Kconfig create mode 100644 drivers/staging/rar_register/Makefile create mode 100644 drivers/staging/rar_register/rar_register.c create mode 100644 drivers/staging/rar_register/rar_register.h diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig index 61ec152..5db72ca 100644 --- a/drivers/staging/Kconfig +++ b/drivers/staging/Kconfig @@ -113,7 +113,7 @@ source "drivers/staging/hv/Kconfig" source "drivers/staging/vme/Kconfig" -source "drivers/staging/rar/Kconfig" +source "drivers/staging/rar_register/Kconfig" source "drivers/staging/sep/Kconfig" diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile index dc40493..6415f38 100644 --- a/drivers/staging/Makefile +++ b/drivers/staging/Makefile @@ -36,7 +36,7 @@ obj-$(CONFIG_VT6656) += vt6656/ obj-$(CONFIG_FB_UDL) += udlfb/ obj-$(CONFIG_HYPERV) += hv/ obj-$(CONFIG_VME_BUS) += vme/ -obj-$(CONFIG_RAR_REGISTER) += rar/ +obj-$(CONFIG_RAR_REGISTER) += rar_register/ obj-$(CONFIG_DX_SEP) += sep/ obj-$(CONFIG_IIO) += iio/ obj-$(CONFIG_RAMZSWAP) += ramzswap/ diff --git a/drivers/staging/rar/Kconfig b/drivers/staging/rar/Kconfig deleted file mode 100644 index 17f8bf3..0000000 --- a/drivers/staging/rar/Kconfig +++ /dev/null @@ -1,17 +0,0 @@ -# -# RAR device configuration -# - -menu "RAR Register Driver" -# -# Restricted Access Register Manager -# -config RAR_REGISTER - tristate "Restricted Access Region Register Driver" - default n - ---help--- - This driver allows other kernel drivers access to the - contents of the restricted access region control - registers. - -endmenu diff --git a/drivers/staging/rar/Makefile b/drivers/staging/rar/Makefile deleted file mode 100644 index d5954cc..0000000 --- a/drivers/staging/rar/Makefile +++ /dev/null @@ -1,2 +0,0 @@ -EXTRA_CFLAGS += -DLITTLE__ENDIAN -obj-$(CONFIG_RAR_REGISTER) += rar_register.o diff --git a/drivers/staging/rar/rar_register.c b/drivers/staging/rar/rar_register.c deleted file mode 100644 index 51eb5a3..0000000 --- a/drivers/staging/rar/rar_register.c +++ /dev/null @@ -1,440 +0,0 @@ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include "rar_register.h" - -/* The following defines are for the IPC process to retrieve RAR in */ - -/* === Lincroft Message Bus Interface === */ -/* Message Control Register */ -#define LNC_MCR_OFFSET 0xD0 - -/* Message Data Register */ -#define LNC_MDR_OFFSET 0xD4 - -/* Message Opcodes */ -#define LNC_MESSAGE_READ_OPCODE 0xD0 -#define LNC_MESSAGE_WRITE_OPCODE 0xE0 - -/* Message Write Byte Enables */ -#define LNC_MESSAGE_BYTE_WRITE_ENABLES 0xF - -/* B-unit Port */ -#define LNC_BUNIT_PORT 0x3 - -/* === Lincroft B-Unit Registers - Programmed by IA32 firmware === */ -#define LNC_BRAR0L 0x10 -#define LNC_BRAR0H 0x11 -#define LNC_BRAR1L 0x12 -#define LNC_BRAR1H 0x13 - -/* Reserved for SeP */ -#define LNC_BRAR2L 0x14 -#define LNC_BRAR2H 0x15 - - -/* This structure is only used during module initialization. */ -struct RAR_offsets { - int low; /* Register offset for low RAR physical address. */ - int high; /* Register offset for high RAR physical address. */ -}; - -struct pci_dev *rar_dev; -static uint32_t registered; - -/* Moorestown supports three restricted access regions. */ -#define MRST_NUM_RAR 3 - -struct RAR_address_struct rar_addr[MRST_NUM_RAR]; - -/* prototype for init */ -static int __init rar_init_handler(void); -static void __exit rar_exit_handler(void); - -/* - function that is activated on the successfull probe of the RAR device -*/ -static int __devinit rar_probe(struct pci_dev *pdev, - const struct pci_device_id *ent); - -static const struct pci_device_id rar_pci_id_tbl[] = { - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4110) }, - { 0 } -}; - -MODULE_DEVICE_TABLE(pci, rar_pci_id_tbl); - -/* field for registering driver to PCI device */ -static struct pci_driver rar_pci_driver = { - .name = "rar_driver", - .id_table = rar_pci_id_tbl, - .probe = rar_probe -}; - -/* This function is used to retrieved RAR info using the IPC message - bus interface */ -static int memrar_get_rar_addr(struct pci_dev *pdev, - int offset, - u32 *addr) -{ - /* - * ======== The Lincroft Message Bus Interface ======== - * Lincroft registers may be obtained from the PCI - * (the Host Bridge) using the Lincroft Message Bus - * Interface. That message bus interface is generally - * comprised of two registers: a control register (MCR, 0xDO) - * and a data register (MDR, 0xD4). - * - * The MCR (message control register) format is the following: - * 1. [31:24]: Opcode - * 2. [23:16]: Port - * 3. [15:8]: Register Offset - * 4. [7:4]: Byte Enables (use 0xF to set all of these bits - * to 1) - * 5. [3:0]: reserved - * - * Read (0xD0) and write (0xE0) opcodes are written to the - * control register when reading and writing to Lincroft - * registers, respectively. - * - * We're interested in registers found in the Lincroft - * B-unit. The B-unit port is 0x3. - * - * The six B-unit RAR register offsets we use are listed - * earlier in this file. - * - * Lastly writing to the MCR register requires the "Byte - * enables" bits to be set to 1. This may be achieved by - * writing 0xF at bit 4. - * - * The MDR (message data register) format is the following: - * 1. [31:0]: Read/Write Data - * - * Data being read from this register is only available after - * writing the appropriate control message to the MCR - * register. - * - * Data being written to this register must be written before - * writing the appropriate control message to the MCR - * register. - */ - - int result = 0; /* result */ - /* Construct control message */ - u32 const message = - (LNC_MESSAGE_READ_OPCODE << 24) - | (LNC_BUNIT_PORT << 16) - | (offset << 8) - | (LNC_MESSAGE_BYTE_WRITE_ENABLES << 4); - - printk(KERN_WARNING "rar- offset to LNC MSG is %x\n", offset); - - if (addr == 0) - return -EINVAL; - - /* Send the control message */ - result = pci_write_config_dword(pdev, - LNC_MCR_OFFSET, - message); - - printk(KERN_WARNING "rar- result from send ctl register is %x\n", - result); - - if (!result) - result = pci_read_config_dword(pdev, - LNC_MDR_OFFSET, - addr); - - printk(KERN_WARNING "rar- result from read data register is %x\n", - result); - - printk(KERN_WARNING "rar- value read from data register is %x\n", - *addr); - - if (result) - return -1; - else - return 0; -} - -static int memrar_set_rar_addr(struct pci_dev *pdev, - int offset, - u32 addr) -{ - /* - * ======== The Lincroft Message Bus Interface ======== - * Lincroft registers may be obtained from the PCI - * (the Host Bridge) using the Lincroft Message Bus - * Interface. That message bus interface is generally - * comprised of two registers: a control register (MCR, 0xDO) - * and a data register (MDR, 0xD4). - * - * The MCR (message control register) format is the following: - * 1. [31:24]: Opcode - * 2. [23:16]: Port - * 3. [15:8]: Register Offset - * 4. [7:4]: Byte Enables (use 0xF to set all of these bits - * to 1) - * 5. [3:0]: reserved - * - * Read (0xD0) and write (0xE0) opcodes are written to the - * control register when reading and writing to Lincroft - * registers, respectively. - * - * We're interested in registers found in the Lincroft - * B-unit. The B-unit port is 0x3. - * - * The six B-unit RAR register offsets we use are listed - * earlier in this file. - * - * Lastly writing to the MCR register requires the "Byte - * enables" bits to be set to 1. This may be achieved by - * writing 0xF at bit 4. - * - * The MDR (message data register) format is the following: - * 1. [31:0]: Read/Write Data - * - * Data being read from this register is only available after - * writing the appropriate control message to the MCR - * register. - * - * Data being written to this register must be written before - * writing the appropriate control message to the MCR - * register. - */ - - int result = 0; /* result */ - - /* Construct control message */ - u32 const message = - (LNC_MESSAGE_WRITE_OPCODE << 24) - | (LNC_BUNIT_PORT << 16) - | (offset << 8) - | (LNC_MESSAGE_BYTE_WRITE_ENABLES << 4); - - printk(KERN_WARNING "rar- offset to LNC MSG is %x\n", offset); - - if (addr == 0) - return -EINVAL; - - /* Send the control message */ - result = pci_write_config_dword(pdev, - LNC_MDR_OFFSET, - addr); - - printk(KERN_WARNING "rar- result from send ctl register is %x\n", - result); - - if (!result) - result = pci_write_config_dword(pdev, - LNC_MCR_OFFSET, - message); - - printk(KERN_WARNING "rar- result from write data register is %x\n", - result); - - printk(KERN_WARNING "rar- value read to data register is %x\n", - addr); - - if (result) - return -1; - else - return 0; -} - -/* - - * Initialize RAR parameters, such as physical addresses, etc. - - */ -static int memrar_init_rar_params(struct pci_dev *pdev) -{ - struct RAR_offsets const offsets[] = { - { LNC_BRAR0L, LNC_BRAR0H }, - { LNC_BRAR1L, LNC_BRAR1H }, - { LNC_BRAR2L, LNC_BRAR2H } - }; - - size_t const num_offsets = sizeof(offsets) / sizeof(offsets[0]); - struct RAR_offsets const *end = offsets + num_offsets; - struct RAR_offsets const *i; - unsigned int n = 0; - int result = 0; - - /* Retrieve RAR start and end physical addresses. */ - - /* - * Access the RAR registers through the Lincroft Message Bus - * Interface on PCI device: 00:00.0 Host bridge. - */ - - /* struct pci_dev *pdev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0)); */ - - if (pdev == NULL) - return -ENODEV; - - for (i = offsets; i != end; ++i, ++n) { - if (memrar_get_rar_addr(pdev, - (*i).low, - &(rar_addr[n].low)) != 0 - || memrar_get_rar_addr(pdev, - (*i).high, - &(rar_addr[n].high)) != 0) { - result = -1; - break; - } - } - - /* Done accessing the device. */ - /* pci_dev_put(pdev); */ - - if (result == 0) { - if (1) { - size_t z; - for (z = 0; z != MRST_NUM_RAR; ++z) { - printk(KERN_WARNING - "rar - BRAR[%Zd] physical address low\n" - "\tlow: 0x%08x\n" - "\thigh: 0x%08x\n", - z, - rar_addr[z].low, - rar_addr[z].high); - } - } - } - - return result; -} - -/* - function that is activated on the successfull probe of the RAR device -*/ -static int __devinit rar_probe(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - /* error */ - int error; - - /*------------------------ - CODE - ---------------------------*/ - - DEBUG_PRINT_0(RAR_DEBUG_LEVEL_EXTENDED, - "Rar pci probe starting\n"); - error = 0; - - /* enable the device */ - error = pci_enable_device(pdev); - if (error) { - DEBUG_PRINT_0(RAR_DEBUG_LEVEL_EXTENDED, - "error enabling pci device\n"); - goto end_function; - } - - rar_dev = pdev; - registered = 1; - - /* Initialize the RAR parameters, which have to be retrieved */ - /* via the message bus service */ - error = memrar_init_rar_params(rar_dev); - - if (error) { - DEBUG_PRINT_0(RAR_DEBUG_LEVEL_EXTENDED, - "error getting RAR addresses device\n"); - registered = 0; - goto end_function; - } - -end_function: - - return error; -} - -/* - this function registers the driver to - the device subsystem (either PCI, USB, etc) -*/ -static int __init rar_init_handler(void) -{ - return pci_register_driver(&rar_pci_driver); -} - -static void __exit rar_exit_handler(void) -{ - pci_unregister_driver(&rar_pci_driver); -} - -module_init(rar_init_handler); -module_exit(rar_exit_handler); - -MODULE_LICENSE("GPL"); - - -/* The get_rar_address function is used by other device drivers - * to obtain RAR address information on a RAR. It takes two - * parameter: - * - * int rar_index - * The rar_index is an index to the rar for which you wish to retrieve - * the address information. - * Values can be 0,1, or 2. - * - * struct RAR_address_struct is a pointer to a place to which the function - * can return the address structure for the RAR. - * - * The function returns a 0 upon success or a -1 if there is no RAR - * facility on this system. - */ -int get_rar_address(int rar_index, struct RAR_address_struct *addresses) -{ - if (registered && (rar_index < 3) && (rar_index >= 0)) { - *addresses = rar_addr[rar_index]; - /* strip off lock bit information */ - addresses->low = addresses->low & 0xfffffff0; - addresses->high = addresses->high & 0xfffffff0; - return 0; - } else - return -ENODEV; -} -EXPORT_SYMBOL(get_rar_address); - -/* The lock_rar function is used by other device drivers to lock an RAR. - * once an RAR is locked, it stays locked until the next system reboot. - * The function takes one parameter: - * - * int rar_index - * The rar_index is an index to the rar that you want to lock. - * Values can be 0,1, or 2. - * - * The function returns a 0 upon success or a -1 if there is no RAR - * facility on this system. - */ -int lock_rar(int rar_index) -{ - u32 working_addr; - int result; - - if (registered && (rar_index < 3) && (rar_index >= 0)) { - /* first make sure that lock bits are clear (this does lock) */ - working_addr = rar_addr[rar_index].low & 0xfffffff0; - - /* now send that value to the register using the IPC */ - result = memrar_set_rar_addr(rar_dev, rar_index, working_addr); - return result; - } else - return -ENODEV; -} diff --git a/drivers/staging/rar/rar_register.h b/drivers/staging/rar/rar_register.h deleted file mode 100644 index 4172fbf..0000000 --- a/drivers/staging/rar/rar_register.h +++ /dev/null @@ -1,89 +0,0 @@ -/* === RAR Physical Addresses === */ -struct RAR_address_struct { - u32 low; - u32 high; -}; - -/* The get_rar_address function is used by other device drivers - * to obtain RAR address information on a RAR. It takes two - * parameter: - * - * int rar_index - * The rar_index is an index to the rar for which you wish to retrieve - * the address information. - * Values can be 0,1, or 2. - * - * struct RAR_address_struct is a pointer to a place to which the function - * can return the address structure for the RAR. - * - * The function returns a 0 upon success or a -1 if there is no RAR - * facility on this system. - */ -int get_rar_address(int rar_index, struct RAR_address_struct *addresses); - - -/* The lock_rar function is used by other device drivers to lock an RAR. - * once an RAR is locked, it stays locked until the next system reboot. - * The function takes one parameter: - * - * int rar_index - * The rar_index is an index to the rar that you want to lock. - * Values can be 0,1, or 2. - * - * The function returns a 0 upon success or a -1 if there is no RAR - * facility on this system. - */ -int lock_rar(int rar_index); - - -/* DEBUG LEVEL MASKS */ -#define RAR_DEBUG_LEVEL_BASIC 0x1 - -#define RAR_DEBUG_LEVEL_REGISTERS 0x2 - -#define RAR_DEBUG_LEVEL_EXTENDED 0x4 - -#define DEBUG_LEVEL 0x7 - -/* FUNCTIONAL MACROS */ - -/* debug macro without paramaters */ -#define DEBUG_PRINT_0(DEBUG_LEVEL , info) \ -do { \ - if (DEBUG_LEVEL) { \ - printk(KERN_WARNING info); \ - } \ -} while (0) - -/* debug macro with 1 paramater */ -#define DEBUG_PRINT_1(DEBUG_LEVEL , info , param1) \ -do { \ - if (DEBUG_LEVEL) { \ - printk(KERN_WARNING info , param1); \ - } \ -} while (0) - -/* debug macro with 2 paramaters */ -#define DEBUG_PRINT_2(DEBUG_LEVEL , info , param1, param2) \ -do { \ - if (DEBUG_LEVEL) { \ - printk(KERN_WARNING info , param1, param2); \ - } \ -} while (0) - -/* debug macro with 3 paramaters */ -#define DEBUG_PRINT_3(DEBUG_LEVEL , info , param1, param2 , param3) \ -do { \ - if (DEBUG_LEVEL) { \ - printk(KERN_WARNING info , param1, param2 , param3); \ - } \ -} while (0) - -/* debug macro with 4 paramaters */ -#define DEBUG_PRINT_4(DEBUG_LEVEL , info , param1, param2 , param3 , param4) \ -do { \ - if (DEBUG_LEVEL) { \ - printk(KERN_WARNING info , param1, param2 , param3 , param4); \ - } \ -} while (0) - diff --git a/drivers/staging/rar_register/Kconfig b/drivers/staging/rar_register/Kconfig new file mode 100644 index 0000000..17f8bf3 --- /dev/null +++ b/drivers/staging/rar_register/Kconfig @@ -0,0 +1,17 @@ +# +# RAR device configuration +# + +menu "RAR Register Driver" +# +# Restricted Access Register Manager +# +config RAR_REGISTER + tristate "Restricted Access Region Register Driver" + default n + ---help--- + This driver allows other kernel drivers access to the + contents of the restricted access region control + registers. + +endmenu diff --git a/drivers/staging/rar_register/Makefile b/drivers/staging/rar_register/Makefile new file mode 100644 index 0000000..d5954cc --- /dev/null +++ b/drivers/staging/rar_register/Makefile @@ -0,0 +1,2 @@ +EXTRA_CFLAGS += -DLITTLE__ENDIAN +obj-$(CONFIG_RAR_REGISTER) += rar_register.o diff --git a/drivers/staging/rar_register/rar_register.c b/drivers/staging/rar_register/rar_register.c new file mode 100644 index 0000000..51eb5a3 --- /dev/null +++ b/drivers/staging/rar_register/rar_register.c @@ -0,0 +1,440 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "rar_register.h" + +/* The following defines are for the IPC process to retrieve RAR in */ + +/* === Lincroft Message Bus Interface === */ +/* Message Control Register */ +#define LNC_MCR_OFFSET 0xD0 + +/* Message Data Register */ +#define LNC_MDR_OFFSET 0xD4 + +/* Message Opcodes */ +#define LNC_MESSAGE_READ_OPCODE 0xD0 +#define LNC_MESSAGE_WRITE_OPCODE 0xE0 + +/* Message Write Byte Enables */ +#define LNC_MESSAGE_BYTE_WRITE_ENABLES 0xF + +/* B-unit Port */ +#define LNC_BUNIT_PORT 0x3 + +/* === Lincroft B-Unit Registers - Programmed by IA32 firmware === */ +#define LNC_BRAR0L 0x10 +#define LNC_BRAR0H 0x11 +#define LNC_BRAR1L 0x12 +#define LNC_BRAR1H 0x13 + +/* Reserved for SeP */ +#define LNC_BRAR2L 0x14 +#define LNC_BRAR2H 0x15 + + +/* This structure is only used during module initialization. */ +struct RAR_offsets { + int low; /* Register offset for low RAR physical address. */ + int high; /* Register offset for high RAR physical address. */ +}; + +struct pci_dev *rar_dev; +static uint32_t registered; + +/* Moorestown supports three restricted access regions. */ +#define MRST_NUM_RAR 3 + +struct RAR_address_struct rar_addr[MRST_NUM_RAR]; + +/* prototype for init */ +static int __init rar_init_handler(void); +static void __exit rar_exit_handler(void); + +/* + function that is activated on the successfull probe of the RAR device +*/ +static int __devinit rar_probe(struct pci_dev *pdev, + const struct pci_device_id *ent); + +static const struct pci_device_id rar_pci_id_tbl[] = { + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4110) }, + { 0 } +}; + +MODULE_DEVICE_TABLE(pci, rar_pci_id_tbl); + +/* field for registering driver to PCI device */ +static struct pci_driver rar_pci_driver = { + .name = "rar_driver", + .id_table = rar_pci_id_tbl, + .probe = rar_probe +}; + +/* This function is used to retrieved RAR info using the IPC message + bus interface */ +static int memrar_get_rar_addr(struct pci_dev *pdev, + int offset, + u32 *addr) +{ + /* + * ======== The Lincroft Message Bus Interface ======== + * Lincroft registers may be obtained from the PCI + * (the Host Bridge) using the Lincroft Message Bus + * Interface. That message bus interface is generally + * comprised of two registers: a control register (MCR, 0xDO) + * and a data register (MDR, 0xD4). + * + * The MCR (message control register) format is the following: + * 1. [31:24]: Opcode + * 2. [23:16]: Port + * 3. [15:8]: Register Offset + * 4. [7:4]: Byte Enables (use 0xF to set all of these bits + * to 1) + * 5. [3:0]: reserved + * + * Read (0xD0) and write (0xE0) opcodes are written to the + * control register when reading and writing to Lincroft + * registers, respectively. + * + * We're interested in registers found in the Lincroft + * B-unit. The B-unit port is 0x3. + * + * The six B-unit RAR register offsets we use are listed + * earlier in this file. + * + * Lastly writing to the MCR register requires the "Byte + * enables" bits to be set to 1. This may be achieved by + * writing 0xF at bit 4. + * + * The MDR (message data register) format is the following: + * 1. [31:0]: Read/Write Data + * + * Data being read from this register is only available after + * writing the appropriate control message to the MCR + * register. + * + * Data being written to this register must be written before + * writing the appropriate control message to the MCR + * register. + */ + + int result = 0; /* result */ + /* Construct control message */ + u32 const message = + (LNC_MESSAGE_READ_OPCODE << 24) + | (LNC_BUNIT_PORT << 16) + | (offset << 8) + | (LNC_MESSAGE_BYTE_WRITE_ENABLES << 4); + + printk(KERN_WARNING "rar- offset to LNC MSG is %x\n", offset); + + if (addr == 0) + return -EINVAL; + + /* Send the control message */ + result = pci_write_config_dword(pdev, + LNC_MCR_OFFSET, + message); + + printk(KERN_WARNING "rar- result from send ctl register is %x\n", + result); + + if (!result) + result = pci_read_config_dword(pdev, + LNC_MDR_OFFSET, + addr); + + printk(KERN_WARNING "rar- result from read data register is %x\n", + result); + + printk(KERN_WARNING "rar- value read from data register is %x\n", + *addr); + + if (result) + return -1; + else + return 0; +} + +static int memrar_set_rar_addr(struct pci_dev *pdev, + int offset, + u32 addr) +{ + /* + * ======== The Lincroft Message Bus Interface ======== + * Lincroft registers may be obtained from the PCI + * (the Host Bridge) using the Lincroft Message Bus + * Interface. That message bus interface is generally + * comprised of two registers: a control register (MCR, 0xDO) + * and a data register (MDR, 0xD4). + * + * The MCR (message control register) format is the following: + * 1. [31:24]: Opcode + * 2. [23:16]: Port + * 3. [15:8]: Register Offset + * 4. [7:4]: Byte Enables (use 0xF to set all of these bits + * to 1) + * 5. [3:0]: reserved + * + * Read (0xD0) and write (0xE0) opcodes are written to the + * control register when reading and writing to Lincroft + * registers, respectively. + * + * We're interested in registers found in the Lincroft + * B-unit. The B-unit port is 0x3. + * + * The six B-unit RAR register offsets we use are listed + * earlier in this file. + * + * Lastly writing to the MCR register requires the "Byte + * enables" bits to be set to 1. This may be achieved by + * writing 0xF at bit 4. + * + * The MDR (message data register) format is the following: + * 1. [31:0]: Read/Write Data + * + * Data being read from this register is only available after + * writing the appropriate control message to the MCR + * register. + * + * Data being written to this register must be written before + * writing the appropriate control message to the MCR + * register. + */ + + int result = 0; /* result */ + + /* Construct control message */ + u32 const message = + (LNC_MESSAGE_WRITE_OPCODE << 24) + | (LNC_BUNIT_PORT << 16) + | (offset << 8) + | (LNC_MESSAGE_BYTE_WRITE_ENABLES << 4); + + printk(KERN_WARNING "rar- offset to LNC MSG is %x\n", offset); + + if (addr == 0) + return -EINVAL; + + /* Send the control message */ + result = pci_write_config_dword(pdev, + LNC_MDR_OFFSET, + addr); + + printk(KERN_WARNING "rar- result from send ctl register is %x\n", + result); + + if (!result) + result = pci_write_config_dword(pdev, + LNC_MCR_OFFSET, + message); + + printk(KERN_WARNING "rar- result from write data register is %x\n", + result); + + printk(KERN_WARNING "rar- value read to data register is %x\n", + addr); + + if (result) + return -1; + else + return 0; +} + +/* + + * Initialize RAR parameters, such as physical addresses, etc. + + */ +static int memrar_init_rar_params(struct pci_dev *pdev) +{ + struct RAR_offsets const offsets[] = { + { LNC_BRAR0L, LNC_BRAR0H }, + { LNC_BRAR1L, LNC_BRAR1H }, + { LNC_BRAR2L, LNC_BRAR2H } + }; + + size_t const num_offsets = sizeof(offsets) / sizeof(offsets[0]); + struct RAR_offsets const *end = offsets + num_offsets; + struct RAR_offsets const *i; + unsigned int n = 0; + int result = 0; + + /* Retrieve RAR start and end physical addresses. */ + + /* + * Access the RAR registers through the Lincroft Message Bus + * Interface on PCI device: 00:00.0 Host bridge. + */ + + /* struct pci_dev *pdev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0)); */ + + if (pdev == NULL) + return -ENODEV; + + for (i = offsets; i != end; ++i, ++n) { + if (memrar_get_rar_addr(pdev, + (*i).low, + &(rar_addr[n].low)) != 0 + || memrar_get_rar_addr(pdev, + (*i).high, + &(rar_addr[n].high)) != 0) { + result = -1; + break; + } + } + + /* Done accessing the device. */ + /* pci_dev_put(pdev); */ + + if (result == 0) { + if (1) { + size_t z; + for (z = 0; z != MRST_NUM_RAR; ++z) { + printk(KERN_WARNING + "rar - BRAR[%Zd] physical address low\n" + "\tlow: 0x%08x\n" + "\thigh: 0x%08x\n", + z, + rar_addr[z].low, + rar_addr[z].high); + } + } + } + + return result; +} + +/* + function that is activated on the successfull probe of the RAR device +*/ +static int __devinit rar_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + /* error */ + int error; + + /*------------------------ + CODE + ---------------------------*/ + + DEBUG_PRINT_0(RAR_DEBUG_LEVEL_EXTENDED, + "Rar pci probe starting\n"); + error = 0; + + /* enable the device */ + error = pci_enable_device(pdev); + if (error) { + DEBUG_PRINT_0(RAR_DEBUG_LEVEL_EXTENDED, + "error enabling pci device\n"); + goto end_function; + } + + rar_dev = pdev; + registered = 1; + + /* Initialize the RAR parameters, which have to be retrieved */ + /* via the message bus service */ + error = memrar_init_rar_params(rar_dev); + + if (error) { + DEBUG_PRINT_0(RAR_DEBUG_LEVEL_EXTENDED, + "error getting RAR addresses device\n"); + registered = 0; + goto end_function; + } + +end_function: + + return error; +} + +/* + this function registers the driver to + the device subsystem (either PCI, USB, etc) +*/ +static int __init rar_init_handler(void) +{ + return pci_register_driver(&rar_pci_driver); +} + +static void __exit rar_exit_handler(void) +{ + pci_unregister_driver(&rar_pci_driver); +} + +module_init(rar_init_handler); +module_exit(rar_exit_handler); + +MODULE_LICENSE("GPL"); + + +/* The get_rar_address function is used by other device drivers + * to obtain RAR address information on a RAR. It takes two + * parameter: + * + * int rar_index + * The rar_index is an index to the rar for which you wish to retrieve + * the address information. + * Values can be 0,1, or 2. + * + * struct RAR_address_struct is a pointer to a place to which the function + * can return the address structure for the RAR. + * + * The function returns a 0 upon success or a -1 if there is no RAR + * facility on this system. + */ +int get_rar_address(int rar_index, struct RAR_address_struct *addresses) +{ + if (registered && (rar_index < 3) && (rar_index >= 0)) { + *addresses = rar_addr[rar_index]; + /* strip off lock bit information */ + addresses->low = addresses->low & 0xfffffff0; + addresses->high = addresses->high & 0xfffffff0; + return 0; + } else + return -ENODEV; +} +EXPORT_SYMBOL(get_rar_address); + +/* The lock_rar function is used by other device drivers to lock an RAR. + * once an RAR is locked, it stays locked until the next system reboot. + * The function takes one parameter: + * + * int rar_index + * The rar_index is an index to the rar that you want to lock. + * Values can be 0,1, or 2. + * + * The function returns a 0 upon success or a -1 if there is no RAR + * facility on this system. + */ +int lock_rar(int rar_index) +{ + u32 working_addr; + int result; + + if (registered && (rar_index < 3) && (rar_index >= 0)) { + /* first make sure that lock bits are clear (this does lock) */ + working_addr = rar_addr[rar_index].low & 0xfffffff0; + + /* now send that value to the register using the IPC */ + result = memrar_set_rar_addr(rar_dev, rar_index, working_addr); + return result; + } else + return -ENODEV; +} diff --git a/drivers/staging/rar_register/rar_register.h b/drivers/staging/rar_register/rar_register.h new file mode 100644 index 0000000..4172fbf --- /dev/null +++ b/drivers/staging/rar_register/rar_register.h @@ -0,0 +1,89 @@ +/* === RAR Physical Addresses === */ +struct RAR_address_struct { + u32 low; + u32 high; +}; + +/* The get_rar_address function is used by other device drivers + * to obtain RAR address information on a RAR. It takes two + * parameter: + * + * int rar_index + * The rar_index is an index to the rar for which you wish to retrieve + * the address information. + * Values can be 0,1, or 2. + * + * struct RAR_address_struct is a pointer to a place to which the function + * can return the address structure for the RAR. + * + * The function returns a 0 upon success or a -1 if there is no RAR + * facility on this system. + */ +int get_rar_address(int rar_index, struct RAR_address_struct *addresses); + + +/* The lock_rar function is used by other device drivers to lock an RAR. + * once an RAR is locked, it stays locked until the next system reboot. + * The function takes one parameter: + * + * int rar_index + * The rar_index is an index to the rar that you want to lock. + * Values can be 0,1, or 2. + * + * The function returns a 0 upon success or a -1 if there is no RAR + * facility on this system. + */ +int lock_rar(int rar_index); + + +/* DEBUG LEVEL MASKS */ +#define RAR_DEBUG_LEVEL_BASIC 0x1 + +#define RAR_DEBUG_LEVEL_REGISTERS 0x2 + +#define RAR_DEBUG_LEVEL_EXTENDED 0x4 + +#define DEBUG_LEVEL 0x7 + +/* FUNCTIONAL MACROS */ + +/* debug macro without paramaters */ +#define DEBUG_PRINT_0(DEBUG_LEVEL , info) \ +do { \ + if (DEBUG_LEVEL) { \ + printk(KERN_WARNING info); \ + } \ +} while (0) + +/* debug macro with 1 paramater */ +#define DEBUG_PRINT_1(DEBUG_LEVEL , info , param1) \ +do { \ + if (DEBUG_LEVEL) { \ + printk(KERN_WARNING info , param1); \ + } \ +} while (0) + +/* debug macro with 2 paramaters */ +#define DEBUG_PRINT_2(DEBUG_LEVEL , info , param1, param2) \ +do { \ + if (DEBUG_LEVEL) { \ + printk(KERN_WARNING info , param1, param2); \ + } \ +} while (0) + +/* debug macro with 3 paramaters */ +#define DEBUG_PRINT_3(DEBUG_LEVEL , info , param1, param2 , param3) \ +do { \ + if (DEBUG_LEVEL) { \ + printk(KERN_WARNING info , param1, param2 , param3); \ + } \ +} while (0) + +/* debug macro with 4 paramaters */ +#define DEBUG_PRINT_4(DEBUG_LEVEL , info , param1, param2 , param3 , param4) \ +do { \ + if (DEBUG_LEVEL) { \ + printk(KERN_WARNING info , param1, param2 , param3 , param4); \ + } \ +} while (0) + -- 1.6.0.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/