diff options
Diffstat (limited to 'octeon-pci-console.c')
| -rw-r--r-- | octeon-pci-console.c | 480 |
1 files changed, 480 insertions, 0 deletions
diff --git a/octeon-pci-console.c b/octeon-pci-console.c new file mode 100644 index 000000000000..7f4e5ab5e054 --- /dev/null +++ b/octeon-pci-console.c @@ -0,0 +1,480 @@ +/***********************license start*************** + * Copyright (c) 2003-2008 Cavium Networks (support@cavium.com). All rights + * reserved. + * + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * * Neither the name of Cavium Networks nor the names of + * its contributors may be used to endorse or promote products + * derived from this software without specific prior written + * permission. + * + * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" + * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS + * OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH + * RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY + * REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT + * DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES + * OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR + * PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET + * POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT + * OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU. + * + * + * For any questions regarding licensing please contact marketing@caviumnetworks.com + * + ***********************license end**************************************/ + + + + + + +#define CVMX_USE_1_TO_1_TLB_MAPPINGS 0 + +#include "cvmx-platform.h" + +#include "cvmx.h" +#include "cvmx-spinlock.h" +#define MIN(a,b) (((a)<(b))?(a):(b)) + +#if !defined(CVMX_BUILD_FOR_LINUX_KERNEL) +#include "cvmx-bootmem.h" +#endif + +#include "octeon-pci-console.h" + +#if defined(__linux__) && !defined(__KERNEL__) && !defined(OCTEON_TARGET) +#include "octeon-pci.h" +#endif + + +/* The following code is only used in standalone CVMX applications. It does + not apply for kernel or Linux programming */ +#if defined(OCTEON_TARGET) && !defined(__linux__) + +static int cvmx_pci_console_num = 0; +static int per_core_pci_consoles = 0; +static uint64_t pci_console_desc_addr = 0; +/* This function for simple executive internal use only - do not use in any application */ +int __cvmx_pci_console_write (int fd, char *buf, int nbytes) +{ + int console_num; + if (fd >= 0x10000000) + { + console_num = fd & 0xFFFF; + } + else if (per_core_pci_consoles) + { + console_num = cvmx_get_core_num(); + } + else + console_num = cvmx_pci_console_num; + + if (!pci_console_desc_addr) + { + cvmx_bootmem_named_block_desc_t *block_desc = cvmx_bootmem_find_named_block(OCTEON_PCI_CONSOLE_BLOCK_NAME); + pci_console_desc_addr = block_desc->base_addr; + } + + + return octeon_pci_console_write(pci_console_desc_addr, console_num, buf, nbytes, 0); + +} + +#endif + + +#if !defined(CONFIG_OCTEON_U_BOOT) || (defined(CONFIG_OCTEON_U_BOOT) && defined(CFG_PCI_CONSOLE)) +int octeon_pci_console_buffer_free_bytes(uint32_t buffer_size, uint32_t wr_idx, uint32_t rd_idx) +{ + if (rd_idx >= buffer_size || wr_idx >= buffer_size) + return -1; + + return (((buffer_size -1) - (wr_idx - rd_idx))%buffer_size); +} +int octeon_pci_console_buffer_avail_bytes(uint32_t buffer_size, uint32_t wr_idx, uint32_t rd_idx) +{ + if (rd_idx >= buffer_size || wr_idx >= buffer_size) + return -1; + + return (buffer_size - 1 - octeon_pci_console_buffer_free_bytes(buffer_size, wr_idx, rd_idx)); +} +#endif + + + +/* The following code is only used under Linux userspace when you are using + CVMX */ +#if defined(__linux__) && !defined(__KERNEL__) && !defined(OCTEON_TARGET) +int octeon_pci_console_host_write(uint64_t console_desc_addr, unsigned int console_num, const char * buffer, int write_reqest_size, uint32_t flags) +{ + if (!console_desc_addr) + return -1; + + /* Get global pci console information and look up specific console structure. */ + uint32_t num_consoles = octeon_read_mem32(console_desc_addr + offsetof(octeon_pci_console_desc_t, num_consoles)); +// printf("Num consoles: %d, buf size: %d\n", num_consoles, console_buffer_size); + if (console_num >= num_consoles) + { + printf("ERROR: attempting to read non-existant console: %d\n", console_num); + return(-1); + } + uint64_t console_addr = octeon_read_mem64(console_desc_addr + offsetof(octeon_pci_console_desc_t, console_addr_array) + console_num *8); +// printf("Console %d is at 0x%llx\n", console_num, (long long)console_addr); + + uint32_t console_buffer_size = octeon_read_mem32(console_addr + offsetof(octeon_pci_console_t, buf_size)); + /* Check to see if any data is available */ + uint32_t rd_idx, wr_idx; + uint64_t base_addr; + + base_addr = octeon_read_mem64(console_addr + offsetof(octeon_pci_console_t, input_base_addr)); + rd_idx = octeon_read_mem32(console_addr + offsetof(octeon_pci_console_t, input_read_index)); + wr_idx = octeon_read_mem32(console_addr + offsetof(octeon_pci_console_t, input_write_index)); + +// printf("Input base: 0x%llx, rd: %d(0x%x), wr: %d(0x%x)\n", (long long)base_addr, rd_idx, rd_idx, wr_idx, wr_idx); + int bytes_to_write = octeon_pci_console_buffer_free_bytes(console_buffer_size, wr_idx, rd_idx); + if (bytes_to_write <= 0) + return bytes_to_write; + bytes_to_write = MIN(bytes_to_write, write_reqest_size); + /* Check to see if what we want to write is not contiguous, and limit ourselves to the contiguous block*/ + if (wr_idx + bytes_to_write >= console_buffer_size) + bytes_to_write = console_buffer_size - wr_idx; + +// printf("Attempting to write %d bytes, (buf size: %d)\n", bytes_to_write, write_reqest_size); + + octeon_pci_write_mem(base_addr + wr_idx, buffer, bytes_to_write, OCTEON_PCI_ENDIAN_64BIT_SWAP); + octeon_write_mem32(console_addr + offsetof(octeon_pci_console_t, input_write_index), (wr_idx + bytes_to_write)%console_buffer_size); + + return bytes_to_write; + +} + +int octeon_pci_console_host_read(uint64_t console_desc_addr, unsigned int console_num, char * buffer, int buf_size, uint32_t flags) +{ + if (!console_desc_addr) + return -1; + + /* Get global pci console information and look up specific console structure. */ + uint32_t num_consoles = octeon_read_mem32(console_desc_addr + offsetof(octeon_pci_console_desc_t, num_consoles)); +// printf("Num consoles: %d, buf size: %d\n", num_consoles, console_buffer_size); + if (console_num >= num_consoles) + { + printf("ERROR: attempting to read non-existant console: %d\n", console_num); + return(-1); + } + uint64_t console_addr = octeon_read_mem64(console_desc_addr + offsetof(octeon_pci_console_desc_t, console_addr_array) + console_num *8); + uint32_t console_buffer_size = octeon_read_mem32(console_addr + offsetof(octeon_pci_console_t, buf_size)); +// printf("Console %d is at 0x%llx\n", console_num, (long long)console_addr); + + /* Check to see if any data is available */ + uint32_t rd_idx, wr_idx; + uint64_t base_addr; + + base_addr = octeon_read_mem64(console_addr + offsetof(octeon_pci_console_t, output_base_addr)); + rd_idx = octeon_read_mem32(console_addr + offsetof(octeon_pci_console_t, output_read_index)); + wr_idx = octeon_read_mem32(console_addr + offsetof(octeon_pci_console_t, output_write_index)); + +// printf("Read buffer base: 0x%llx, rd: %d(0x%x), wr: %d(0x%x)\n", (long long)base_addr, rd_idx, rd_idx, wr_idx, wr_idx); + int bytes_to_read = octeon_pci_console_buffer_avail_bytes(console_buffer_size, wr_idx, rd_idx); + if (bytes_to_read <= 0) + return bytes_to_read; + + + bytes_to_read = MIN(bytes_to_read, buf_size); + /* Check to see if what we want to read is not contiguous, and limit ourselves to the contiguous block*/ + if (rd_idx + bytes_to_read >= console_buffer_size) + bytes_to_read = console_buffer_size - rd_idx; + + + octeon_pci_read_mem(buffer, base_addr + rd_idx, bytes_to_read,OCTEON_PCI_ENDIAN_64BIT_SWAP); + octeon_write_mem32(console_addr + offsetof(octeon_pci_console_t, output_read_index), (rd_idx + bytes_to_read)%console_buffer_size); + + return bytes_to_read; +} + + +int octeon_pci_console_host_write_avail(uint64_t console_desc_addr, unsigned int console_num) +{ + if (!console_desc_addr) + return -1; + + /* Get global pci console information and look up specific console structure. */ + uint32_t num_consoles = octeon_read_mem32(console_desc_addr + offsetof(octeon_pci_console_desc_t, num_consoles)); +// printf("Num consoles: %d, buf size: %d\n", num_consoles, console_buffer_size); + if (console_num >= num_consoles) + { + printf("ERROR: attempting to read non-existant console: %d\n", console_num); + return -1; + } + uint64_t console_addr = octeon_read_mem64(console_desc_addr + offsetof(octeon_pci_console_desc_t, console_addr_array) + console_num *8); +// printf("Console %d is at 0x%llx\n", console_num, (long long)console_addr); + + uint32_t console_buffer_size = octeon_read_mem32(console_addr + offsetof(octeon_pci_console_t, buf_size)); + /* Check to see if any data is available */ + uint32_t rd_idx, wr_idx; + uint64_t base_addr; + + base_addr = octeon_read_mem64(console_addr + offsetof(octeon_pci_console_t, input_base_addr)); + rd_idx = octeon_read_mem32(console_addr + offsetof(octeon_pci_console_t, input_read_index)); + wr_idx = octeon_read_mem32(console_addr + offsetof(octeon_pci_console_t, input_write_index)); + +// printf("Input base: 0x%llx, rd: %d(0x%x), wr: %d(0x%x)\n", (long long)base_addr, rd_idx, rd_idx, wr_idx, wr_idx); + return octeon_pci_console_buffer_free_bytes(console_buffer_size, wr_idx, rd_idx); +} + + +int octeon_pci_console_host_read_avail(uint64_t console_desc_addr, unsigned int console_num) +{ + if (!console_desc_addr) + return -1; + + /* Get global pci console information and look up specific console structure. */ + uint32_t num_consoles = octeon_read_mem32(console_desc_addr + offsetof(octeon_pci_console_desc_t, num_consoles)); +// printf("Num consoles: %d, buf size: %d\n", num_consoles, console_buffer_size); + if (console_num >= num_consoles) + { + printf("ERROR: attempting to read non-existant console: %d\n", console_num); + return(-1); + } + uint64_t console_addr = octeon_read_mem64(console_desc_addr + offsetof(octeon_pci_console_desc_t, console_addr_array) + console_num *8); + uint32_t console_buffer_size = octeon_read_mem32(console_addr + offsetof(octeon_pci_console_t, buf_size)); +// printf("Console %d is at 0x%llx\n", console_num, (long long)console_addr); + + /* Check to see if any data is available */ + uint32_t rd_idx, wr_idx; + uint64_t base_addr; + + base_addr = octeon_read_mem64(console_addr + offsetof(octeon_pci_console_t, output_base_addr)); + rd_idx = octeon_read_mem32(console_addr + offsetof(octeon_pci_console_t, output_read_index)); + wr_idx = octeon_read_mem32(console_addr + offsetof(octeon_pci_console_t, output_write_index)); + +// printf("Read buffer base: 0x%llx, rd: %d(0x%x), wr: %d(0x%x)\n", (long long)base_addr, rd_idx, rd_idx, wr_idx, wr_idx); + return octeon_pci_console_buffer_avail_bytes(console_buffer_size, wr_idx, rd_idx); +} + + +#endif /* TARGET_HOST */ + + + + + + +/* This code is only available in a kernel or CVMX standalone. It can't be used + from userspace */ +#if (!defined(CONFIG_OCTEON_U_BOOT) && (!defined(__linux__) || defined(__KERNEL__))) || (defined(CONFIG_OCTEON_U_BOOT) && defined(CFG_PCI_CONSOLE)) + +static octeon_pci_console_t *octeon_pci_console_get_ptr(uint64_t console_desc_addr, unsigned int console_num) +{ + octeon_pci_console_desc_t *cons_desc_ptr; + + if (!console_desc_addr) + return NULL; + + cons_desc_ptr = (octeon_pci_console_desc_t *)cvmx_phys_to_ptr(console_desc_addr); + if (console_num >= cons_desc_ptr->num_consoles) + return NULL; + + return (octeon_pci_console_t *)cvmx_phys_to_ptr(cons_desc_ptr->console_addr_array[console_num]); +} + + +int octeon_pci_console_write(uint64_t console_desc_addr, unsigned int console_num, const char * buffer, int bytes_to_write, uint32_t flags) +{ + octeon_pci_console_t *cons_ptr; + cvmx_spinlock_t *lock; + int bytes_available; + char *buf_ptr; + int bytes_written; + + cons_ptr = octeon_pci_console_get_ptr(console_desc_addr, console_num); + if (!cons_ptr) + return -1; + + lock = (cvmx_spinlock_t *)&cons_ptr->lock; + + buf_ptr = (char*)cvmx_phys_to_ptr(cons_ptr->output_base_addr); + bytes_written = 0; + cvmx_spinlock_lock(lock); + while (bytes_to_write > 0) + { + bytes_available = octeon_pci_console_buffer_free_bytes(cons_ptr->buf_size, cons_ptr->output_write_index, cons_ptr->output_read_index); +// printf("Console %d has %d bytes available for writes\n", console_num, bytes_available); + if (bytes_available > 0) + { + int write_size = MIN(bytes_available, bytes_to_write); + /* Limit ourselves to what we can output in a contiguous block */ + if (cons_ptr->output_write_index + write_size >= cons_ptr->buf_size) + write_size = cons_ptr->buf_size - cons_ptr->output_write_index; + + memcpy(buf_ptr + cons_ptr->output_write_index, buffer + bytes_written, write_size); + CVMX_SYNCW; /* Make sure data is visible before changing write index */ + cons_ptr->output_write_index = (cons_ptr->output_write_index + write_size)%cons_ptr->buf_size; + bytes_to_write -= write_size; + bytes_written += write_size; + } + else if (bytes_available == 0) + { + /* Check to see if we should wait for room, or return after a partial write */ + if (flags & OCT_PCI_CON_FLAG_NONBLOCK) + goto done; + + cvmx_wait(1000000); /* Delay if we are spinning */ + } + else + { + bytes_written = -1; + goto done; + } + } + +done: + cvmx_spinlock_unlock(lock); + return(bytes_written); +} + +int octeon_pci_console_read(uint64_t console_desc_addr, unsigned int console_num, char * buffer, int buffer_size, uint32_t flags) +{ + int bytes_available; + char *buf_ptr; + cvmx_spinlock_t *lock; + int bytes_read; + int read_size; + octeon_pci_console_t *cons_ptr = octeon_pci_console_get_ptr(console_desc_addr, console_num); + if (!cons_ptr) + return -1; + + buf_ptr = (char*)cvmx_phys_to_ptr(cons_ptr->input_base_addr); + + bytes_available = octeon_pci_console_buffer_avail_bytes(cons_ptr->buf_size, cons_ptr->input_write_index, cons_ptr->input_read_index); + if (bytes_available < 0) + return bytes_available; + + lock = (cvmx_spinlock_t *)&cons_ptr->lock; + cvmx_spinlock_lock(lock); + + if (!(flags & OCT_PCI_CON_FLAG_NONBLOCK)) + { + /* Wait for some data to be available */ + while (0 == (bytes_available = octeon_pci_console_buffer_avail_bytes(cons_ptr->buf_size, cons_ptr->input_write_index, cons_ptr->input_read_index))) + cvmx_wait(1000000); + } + + bytes_read = 0; +// printf("Console %d has %d bytes available for writes\n", console_num, bytes_available); + + /* Don't overflow the buffer passed to us */ + read_size = MIN(bytes_available, buffer_size); + + /* Limit ourselves to what we can input in a contiguous block */ + if (cons_ptr->input_read_index + read_size >= cons_ptr->buf_size) + read_size = cons_ptr->buf_size - cons_ptr->input_read_index; + + memcpy(buffer, buf_ptr + cons_ptr->input_read_index, read_size); + cons_ptr->input_read_index = (cons_ptr->input_read_index + read_size)%cons_ptr->buf_size; + bytes_read += read_size; + + cvmx_spinlock_unlock(lock); + return(bytes_read); +} + + +int octeon_pci_console_write_avail(uint64_t console_desc_addr, unsigned int console_num) +{ + int bytes_available; + octeon_pci_console_t *cons_ptr = octeon_pci_console_get_ptr(console_desc_addr, console_num); + if (!cons_ptr) + return -1; + + bytes_available = octeon_pci_console_buffer_free_bytes(cons_ptr->buf_size, cons_ptr->input_write_index, cons_ptr->input_read_index); + if (bytes_available >= 0) + return(bytes_available); + else + return 0; +} + + +int octeon_pci_console_read_avail(uint64_t console_desc_addr, unsigned int console_num) +{ + int bytes_available; + octeon_pci_console_t *cons_ptr = octeon_pci_console_get_ptr(console_desc_addr, console_num); + if (!cons_ptr) + return -1; + + bytes_available = octeon_pci_console_buffer_avail_bytes(cons_ptr->buf_size, cons_ptr->input_write_index, cons_ptr->input_read_index); + if (bytes_available >= 0) + return(bytes_available); + else + return 0; +} + +#endif + + +/* This code can only be used in the bootloader */ +#if defined(CONFIG_OCTEON_U_BOOT) && defined(CFG_PCI_CONSOLE) +#define DDR0_TOP 0x10000000 +#define DDR2_BASE 0x20000000 +uint64_t octeon_pci_console_init(int num_consoles, int buffer_size) +{ + octeon_pci_console_desc_t *cons_desc_ptr; + octeon_pci_console_t *cons_ptr; + + /* Compute size required for pci console structure */ + int alloc_size = num_consoles * (buffer_size * 2 + sizeof(octeon_pci_console_t) + sizeof(uint64_t)) + sizeof(octeon_pci_console_desc_t); + + /* Allocate memory for the consoles. This must be in the range addresssible by the bootloader. + ** Try to do so in a manner which minimizes fragmentation. We try to put it at the top of DDR0 or bottom of + ** DDR2 first, and only do generic allocation if those fail */ + int64_t console_block_addr = cvmx_bootmem_phy_named_block_alloc(alloc_size, DDR0_TOP - alloc_size - 128, DDR0_TOP, 128, OCTEON_PCI_CONSOLE_BLOCK_NAME, CVMX_BOOTMEM_FLAG_END_ALLOC); + if (console_block_addr < 0) + console_block_addr = cvmx_bootmem_phy_named_block_alloc(alloc_size, DDR2_BASE + 1, DDR2_BASE + alloc_size + 128, 128, OCTEON_PCI_CONSOLE_BLOCK_NAME, CVMX_BOOTMEM_FLAG_END_ALLOC); + if (console_block_addr < 0) + console_block_addr = cvmx_bootmem_phy_named_block_alloc(alloc_size, 0, 0x7fffffff, 128, OCTEON_PCI_CONSOLE_BLOCK_NAME, CVMX_BOOTMEM_FLAG_END_ALLOC); + if (console_block_addr < 0) + return 0; + + cons_desc_ptr = (void *)(uint32_t)console_block_addr; + + memset(cons_desc_ptr, 0, alloc_size); /* Clear entire alloc'ed memory */ + + cons_desc_ptr->lock = 1; /* initialize as locked until we are done */ + CVMX_SYNCW; + cons_desc_ptr->num_consoles = num_consoles; + cons_desc_ptr->flags = 0; + cons_desc_ptr->major_version = OCTEON_PCI_CONSOLE_MAJOR_VERSION; + cons_desc_ptr->minor_version = OCTEON_PCI_CONSOLE_MINOR_VERSION; + + int i; + uint64_t avail_addr = console_block_addr + sizeof(octeon_pci_console_desc_t) + num_consoles * sizeof(uint64_t); + for (i = 0; i < num_consoles;i++) + { + cons_desc_ptr->console_addr_array[i] = avail_addr; + cons_ptr = (void *)(uint32_t)cons_desc_ptr->console_addr_array[i]; + avail_addr += sizeof(octeon_pci_console_t); + cons_ptr->input_base_addr = avail_addr; + avail_addr += buffer_size; + cons_ptr->output_base_addr = avail_addr; + avail_addr += buffer_size; + cons_ptr->buf_size = buffer_size; + } + CVMX_SYNCW; + cons_desc_ptr->lock = 0; + + return console_block_addr; + + +} +#endif |