diff options
Diffstat (limited to 'drivers/staging/fsl-mc/include/mc.h')
| -rw-r--r-- | drivers/staging/fsl-mc/include/mc.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/staging/fsl-mc/include/mc.h b/drivers/staging/fsl-mc/include/mc.h index d37e2c7ed55a..33bb3b8b641c 100644 --- a/drivers/staging/fsl-mc/include/mc.h +++ b/drivers/staging/fsl-mc/include/mc.h @@ -23,6 +23,7 @@ struct msi_domain_info; struct fsl_mc_device; struct fsl_mc_io; +struct mc_command; /** * struct fsl_mc_driver - MC object device driver object @@ -201,6 +202,58 @@ struct fsl_mc_device { #define to_fsl_mc_device(_dev) \ container_of(_dev, struct fsl_mc_device, dev) +/** + * Bit masks for a MC I/O object (struct fsl_mc_io) flags + */ +#define FSL_MC_IO_ATOMIC_CONTEXT_PORTAL 0x0001 + +/** + * struct fsl_mc_io - MC I/O object to be passed-in to mc_send_command() + * @dev: device associated with this Mc I/O object + * @flags: flags for mc_send_command() + * @portal_size: MC command portal size in bytes + * @portal_phys_addr: MC command portal physical address + * @portal_virt_addr: MC command portal virtual address + * @dpmcp_dev: pointer to the DPMCP device associated with the MC portal. + * + * Fields are only meaningful if the FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is not + * set: + * @mutex: Mutex to serialize mc_send_command() calls that use the same MC + * portal, if the fsl_mc_io object was created with the + * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag off. mc_send_command() calls for this + * fsl_mc_io object must be made only from non-atomic context. + * + * Fields are only meaningful if the FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is + * set: + * @spinlock: Spinlock to serialize mc_send_command() calls that use the same MC + * portal, if the fsl_mc_io object was created with the + * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag on. mc_send_command() calls for this + * fsl_mc_io object can be made from atomic or non-atomic context. + */ +struct fsl_mc_io { + struct device *dev; + u16 flags; + u16 portal_size; + phys_addr_t portal_phys_addr; + void __iomem *portal_virt_addr; + struct fsl_mc_device *dpmcp_dev; + union { + /* + * This field is only meaningful if the + * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is not set + */ + struct mutex mutex; /* serializes mc_send_command() */ + + /* + * This field is only meaningful if the + * FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is set + */ + spinlock_t spinlock; /* serializes mc_send_command() */ + }; +}; + +int mc_send_command(struct fsl_mc_io *mc_io, struct mc_command *cmd); + #ifdef CONFIG_FSL_MC_BUS #define dev_is_fsl_mc(_dev) ((_dev)->bus == &fsl_mc_bus_type) #else |