nv-tegra-mirror/linux-nvgpu
1
0
Fork 0
mirror of git://nv-tegra.nvidia.com/linux-nvgpu.git synced 2025-12-24 02:22:34 +03:00
Code Issues Packages Projects Releases Wiki Activity

gpu: nvgpu: add Doxygen documentation for io

Browse Source 
Jira NVGPU-4147

Change-Id: I3b64a88b207b4fbe7a776f36a7fbf2c8023f5168
Signed-off-by: Prateek sethi <prsethi@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2216943
Reviewed-by: Rajesh Devaraj <rdevaraj@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vaibhav Kachore <vkachore@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Prateek sethi
2019-10-13 21:54:29 +05:30
committed by Alex Waterman
parent 0fe7739974
commit f9db4a6ff5
2 changed files with 124 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

118
drivers/gpu/nvgpu/include/nvgpu/io.h
View File

@@ -24,6 +24,12 @@
#include <nvgpu/types.h>
/**
* @file
*
* Interface for mmio access.
*/
/* Legacy defines - should be removed once everybody uses nvgpu_* */
#define gk20a_writel nvgpu_writel
#define gk20a_readl nvgpu_readl
@@ -36,41 +42,133 @@
struct gk20a;
/**
* @brief Write a value to an already mapped io-region.
* @brief Write a value to an already BAR0 mapped io-region.
*
* @param g[in] GPU super structure.
* @param r[in] Register offset in io-region.
* @param v[in] Value to write at the offset.
* @param g [in] GPU super structure.
* @param r [in] Register offset in io-region.
* @param v [in] Value to write at the offset.
*
* - Write a 32-bit value to register offset in BAR0 region with an ordering
* constraint on memory operations.
*
* @return None.
*/
void nvgpu_writel(struct gk20a *g, u32 r, u32 v);
/**
* @brief Write a value to an already BAR0 mapped io-region.
*
* @param g [in] GPU super structure.
* @param r [in] Register offset in io-region.
* @param v [in] Value to write at the offset.
*
* - Write a 32-bit value to register offset in BAR0 region without an ordering
* constraint on memory operations.
*
* @return None.
*/
void nvgpu_writel_relaxed(struct gk20a *g, u32 r, u32 v);
/**
* @brief Read a value from an already mapped io-region.
* @brief Read a value from an already BAR0 mapped io-region.
*
* @param g[in] GPU super structure.
* @param r[in] Register offset in io-region.
* @param g [in] GPU super structure.
* @param r [in] Register offset in io-region.
*
* - Read a 32-bit to register offset from a BAR0 region. If all the bits are
* set in value v and gpu state is not valid, then it logs the event.
*
* @return Value at the given offset of the io-region.
*/
u32 nvgpu_readl(struct gk20a *g, u32 r);
/**
* @brief Read a value from an already mapped io-region.
* @brief Read a value from an already mapped BAR0 io-region.
*
* @param g[in] GPU super structure.
* @param r[in] Register offset in io-region.
* @param g [in] GPU super structure.
* @param r [in] Register offset in io-region.
*
* - Read a 32-bit to register offset from a BAR0 region. It is a wrapper of
* nvgpu_readl.
*
* @return Value at the given offset of the io-region.
*/
u32 nvgpu_readl_impl(struct gk20a *g, u32 r);
/**
* @brief Write validate to an already mapped BAR0 io-region.
*
* @param g [in] GPU super structure.
* @param r [in] Register offset in io-region.
* @param v [in] Value to write at the offset.
*
* - This is a blocking call. It keeps on writing a 32-bit value to a BAR0
* register and reads it back until read/write values are not match.
*
* @return None.
*/
void nvgpu_writel_check(struct gk20a *g, u32 r, u32 v);
/**
* @brief Ensure write to an already mapped BAR0 io-region.
*
* @param g [in] GPU super structure.
* @param r [in] Register offset in io-region.
* @param v [in] Value to write at the offset.
*
* - Write a 32-bit value to register offset in BAR0 region and reads it back to
* confirm value was written successfully.
*
* @return None.
*/
void nvgpu_writel_loop(struct gk20a *g, u32 r, u32 v);
/**
* @brief Write a value to an already mapped bar1 io-region.
*
* @param g [in] GPU super structure.
* @param r [in] Register offset in io-region.
* @param v [in] Value to write at the offset.
*
* - Write a 32-bit value to register offset of region bar1.
*
* @return None.
*/
void nvgpu_bar1_writel(struct gk20a *g, u32 b, u32 v);
/**
* @brief Read a value from an already mapped bar1 io-region.
*
* @param g [in] GPU super structure.
* @param b [in] Register offset in io-region.
*
* - Read a 32-bit value from a region bar1.
*
* @return Value at the given offset of the io-region.
*/
u32 nvgpu_bar1_readl(struct gk20a *g, u32 b);
/**
* @brief Check bar0 io-region is mapped or not
*
* @param g [in] GPU super structure.
*
* - io mapping exists if bar0 address is assigned to regs.
*
* @return TRUE if bar0 is mapped or else FALSE.
*/
bool nvgpu_io_exists(struct gk20a *g);
/**
* @brief Validate BAR0 io-mapped offset.
*
* @param g [in] GPU super structure.
* @param r [in] Register offset in io-region.
*
* - BAR0 Offset is valid if it falls into BAR0 range.
*
* @return TRUE if bar0 offset is valid or else FALSE.
*/
bool nvgpu_io_valid_reg(struct gk20a *g, u32 r);
#endif /* NVGPU_IO_H */

16
drivers/gpu/nvgpu/include/nvgpu/io_usermode.h
View File

@@ -22,6 +22,22 @@
#ifndef NVGPU_IO_USERMODE_H
#define NVGPU_IO_USERMODE_H
/**
* @file
*
* Interface for usermode ops.
*/
/**
* @brief Write a value to an usermode mapped io-region.
*
* @param g[in] GPU super structure.
* @param r [in] Register offset in io-region.
* @param v [in] Value to write at the offset.
*
* Write a 32-bit value to register offset in usermode region.
* @return None.
*/
void nvgpu_usermode_writel(struct gk20a *g, u32 r, u32 v);
#endif /* NVGPU_IO_USERMODE_H */