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iommu/fsl_pamu: replace DOMAIN_ATTR_FSL_PAMU_STASH with a direct call

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Add a fsl_pamu_configure_l1_stash API that qman_portal can call directly
instead of indirecting through the iommu attr API.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Li Yang <leoyang.li@nxp.com>
Link: https://lore.kernel.org/r/20210401155256.298656-8-hch@lst.de
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Christoph Hellwig 2021-04-01 17:52:43 +02:00 committed by Joerg Roedel
parent 376dfd2a2f
commit 4eeb96f6ef
5 changed files with 9 additions and 40 deletions
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12
arch/powerpc/include/asm/fsl_pamu_stash.h
View File

@ -7,6 +7,8 @@
#ifndef __FSL_PAMU_STASH_H
#define __FSL_PAMU_STASH_H
struct iommu_domain;
/* cache stash targets */
enum pamu_stash_target {
PAMU_ATTR_CACHE_L1 = 1,
@ -14,14 +16,6 @@ enum pamu_stash_target {
PAMU_ATTR_CACHE_L3,
};
/*
* This attribute allows configuring stashig specific parameters
* in the PAMU hardware.
*/
struct pamu_stash_attribute {
u32 cpu; /* cpu number */
u32 cache; /* cache to stash to: L1,L2,L3 */
};
int fsl_pamu_configure_l1_stash(struct iommu_domain *domain, u32 cpu);
#endif /* __FSL_PAMU_STASH_H */

16
drivers/iommu/fsl_pamu_domain.c
View File

@ -372,27 +372,20 @@ static void fsl_pamu_detach_device(struct iommu_domain *domain,
}
/* Set the domain stash attribute */
static int configure_domain_stash(struct fsl_dma_domain *dma_domain, void *data)
int fsl_pamu_configure_l1_stash(struct iommu_domain *domain, u32 cpu)
{
struct pamu_stash_attribute *stash_attr = data;
struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain);
unsigned long flags;
int ret;
spin_lock_irqsave(&dma_domain->domain_lock, flags);
memcpy(&dma_domain->dma_stash, stash_attr,
sizeof(struct pamu_stash_attribute));
dma_domain->stash_id = get_stash_id(stash_attr->cache,
stash_attr->cpu);
dma_domain->stash_id = get_stash_id(PAMU_ATTR_CACHE_L1, cpu);
if (dma_domain->stash_id == ~(u32)0) {
pr_debug("Invalid stash attributes\n");
spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
return -EINVAL;
}
ret = update_domain_stash(dma_domain, dma_domain->stash_id);
spin_unlock_irqrestore(&dma_domain->domain_lock, flags);
return ret;
@ -426,9 +419,6 @@ static int fsl_pamu_set_domain_attr(struct iommu_domain *domain,
int ret = 0;
switch (attr_type) {
case DOMAIN_ATTR_FSL_PAMU_STASH:
ret = configure_domain_stash(dma_domain, data);
break;
case DOMAIN_ATTR_FSL_PAMU_ENABLE:
ret = configure_domain_dma_state(dma_domain, *(int *)data);
break;

2
drivers/iommu/fsl_pamu_domain.h
View File

@ -22,9 +22,7 @@ struct fsl_dma_domain {
*
*/
int enabled;
/* stash_id obtained from the stash attribute details */
u32 stash_id;
struct pamu_stash_attribute dma_stash;
u32 snoop_id;
struct iommu_domain iommu_domain;
spinlock_t domain_lock;

18
drivers/soc/fsl/qbman/qman_portal.c
View File

@ -47,7 +47,6 @@ static void portal_set_cpu(struct qm_portal_config *pcfg, int cpu)
#ifdef CONFIG_FSL_PAMU
struct device *dev = pcfg->dev;
int window_count = 1;
struct pamu_stash_attribute stash_attr;
int ret;
pcfg->iommu_domain = iommu_domain_alloc(&platform_bus_type);
@ -55,13 +54,9 @@ static void portal_set_cpu(struct qm_portal_config *pcfg, int cpu)
dev_err(dev, "%s(): iommu_domain_alloc() failed", __func__);
goto no_iommu;
}
stash_attr.cpu = cpu;
stash_attr.cache = PAMU_ATTR_CACHE_L1;
ret = iommu_domain_set_attr(pcfg->iommu_domain,
DOMAIN_ATTR_FSL_PAMU_STASH,
&stash_attr);
ret = fsl_pamu_configure_l1_stash(pcfg->iommu_domain, cpu);
if (ret < 0) {
dev_err(dev, "%s(): iommu_domain_set_attr() = %d",
dev_err(dev, "%s(): fsl_pamu_configure_l1_stash() = %d",
__func__, ret);
goto out_domain_free;
}
@ -143,15 +138,8 @@ static void qman_portal_update_sdest(const struct qm_portal_config *pcfg,
unsigned int cpu)
{
#ifdef CONFIG_FSL_PAMU /* TODO */
struct pamu_stash_attribute stash_attr;
int ret;
if (pcfg->iommu_domain) {
stash_attr.cpu = cpu;
stash_attr.cache = PAMU_ATTR_CACHE_L1;
ret = iommu_domain_set_attr(pcfg->iommu_domain,
DOMAIN_ATTR_FSL_PAMU_STASH, &stash_attr);
if (ret < 0) {
if (fsl_pamu_configure_l1_stash(pcfg->iommu_domain, cpu) < 0) {
dev_err(pcfg->dev,
"Failed to update pamu stash setting\n");
return;

1
include/linux/iommu.h
View File

@ -109,7 +109,6 @@ enum iommu_cap {
enum iommu_attr {
DOMAIN_ATTR_GEOMETRY,
DOMAIN_ATTR_PAGING,
DOMAIN_ATTR_FSL_PAMU_STASH,
DOMAIN_ATTR_FSL_PAMU_ENABLE,
DOMAIN_ATTR_NESTING, /* two stages of translation */
DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE,