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https://github.com/edk2-porting/linux-next.git
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cxlflash: Fix MMIO and endianness errors
Sparse uncovered several errors with MMIO operations (accessing directly) and handling endianness. These can cause issues when running in different environments. Introduce __iomem and proper endianness tags/swaps where appropriate to make driver sparse clean. Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Signed-off-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com> Reviewed-by: Brian King <brking@linux.vnet.ibm.com> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by: Tomas Henzl <thenzl@redhat.com> Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
Matthew R. Ochs
James Bottomley
parent
1284fb0cff
commit
1786f4a093
@ -164,9 +164,9 @@ struct afu {
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/* AFU HW */
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struct cxl_ioctl_start_work work;
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struct cxlflash_afu_map *afu_map; /* entire MMIO map */
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struct sisl_host_map *host_map; /* MC host map */
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struct sisl_ctrl_map *ctrl_map; /* MC control map */
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struct cxlflash_afu_map __iomem *afu_map; /* entire MMIO map */
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struct sisl_host_map __iomem *host_map; /* MC host map */
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struct sisl_ctrl_map __iomem *ctrl_map; /* MC control map */
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ctx_hndl_t ctx_hndl; /* master's context handle */
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u64 *hrrq_start;
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@ -188,10 +188,10 @@ struct afu {
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static inline u64 lun_to_lunid(u64 lun)
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{
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u64 lun_id;
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__be64 lun_id;
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int_to_scsilun(lun, (struct scsi_lun *)&lun_id);
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return swab64(lun_id);
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return be64_to_cpu(lun_id);
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}
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int cxlflash_afu_sync(struct afu *, ctx_hndl_t, res_hndl_t, u8);
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@ -644,7 +644,7 @@ static void stop_afu(struct cxlflash_cfg *cfg)
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complete(&afu->cmd[i].cevent);
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if (likely(afu->afu_map)) {
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cxl_psa_unmap((void *)afu->afu_map);
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cxl_psa_unmap((void __iomem *)afu->afu_map);
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afu->afu_map = NULL;
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}
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}
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@ -914,7 +914,7 @@ out:
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* that the FC link layer has synced, completed the handshaking process, and
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* is ready for login to start.
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*/
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static void set_port_online(u64 *fc_regs)
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static void set_port_online(__be64 __iomem *fc_regs)
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{
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u64 cmdcfg;
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@ -930,7 +930,7 @@ static void set_port_online(u64 *fc_regs)
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*
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* The provided MMIO region must be mapped prior to call.
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*/
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static void set_port_offline(u64 *fc_regs)
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static void set_port_offline(__be64 __iomem *fc_regs)
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{
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u64 cmdcfg;
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@ -954,7 +954,7 @@ static void set_port_offline(u64 *fc_regs)
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* FALSE (0) when the specified port fails to come online after timeout
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* -EINVAL when @delay_us is less than 1000
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*/
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static int wait_port_online(u64 *fc_regs, u32 delay_us, u32 nretry)
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static int wait_port_online(__be64 __iomem *fc_regs, u32 delay_us, u32 nretry)
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{
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u64 status;
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@ -985,7 +985,7 @@ static int wait_port_online(u64 *fc_regs, u32 delay_us, u32 nretry)
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* FALSE (0) when the specified port fails to go offline after timeout
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* -EINVAL when @delay_us is less than 1000
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*/
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static int wait_port_offline(u64 *fc_regs, u32 delay_us, u32 nretry)
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static int wait_port_offline(__be64 __iomem *fc_regs, u32 delay_us, u32 nretry)
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{
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u64 status;
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@ -1020,7 +1020,8 @@ static int wait_port_offline(u64 *fc_regs, u32 delay_us, u32 nretry)
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* 0 when the WWPN is successfully written and the port comes back online
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* -1 when the port fails to go offline or come back up online
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*/
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static int afu_set_wwpn(struct afu *afu, int port, u64 *fc_regs, u64 wwpn)
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static int afu_set_wwpn(struct afu *afu, int port, __be64 __iomem *fc_regs,
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u64 wwpn)
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{
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int rc = 0;
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@ -1065,7 +1066,7 @@ static int afu_set_wwpn(struct afu *afu, int port, u64 *fc_regs, u64 wwpn)
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* the alternate port exclusively while the reset takes place.
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* failure to come online is overridden.
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*/
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static void afu_link_reset(struct afu *afu, int port, u64 *fc_regs)
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static void afu_link_reset(struct afu *afu, int port, __be64 __iomem *fc_regs)
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{
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u64 port_sel;
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@ -1280,7 +1281,7 @@ static irqreturn_t cxlflash_async_err_irq(int irq, void *data)
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struct device *dev = &cfg->dev->dev;
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u64 reg_unmasked;
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const struct asyc_intr_info *info;
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struct sisl_global_map *global = &afu->afu_map->global;
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struct sisl_global_map __iomem *global = &afu->afu_map->global;
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u64 reg;
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u8 port;
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int i;
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@ -1466,7 +1467,7 @@ out:
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static void init_pcr(struct cxlflash_cfg *cfg)
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{
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struct afu *afu = cfg->afu;
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struct sisl_ctrl_map *ctrl_map;
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struct sisl_ctrl_map __iomem *ctrl_map;
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int i;
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for (i = 0; i < MAX_CONTEXT; i++) {
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@ -1755,7 +1756,7 @@ static int init_afu(struct cxlflash_cfg *cfg)
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dev_err(dev, "%s: call to start_afu failed, rc=%d!\n",
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__func__, rc);
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term_mc(cfg, UNDO_START);
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cxl_psa_unmap((void *)afu->afu_map);
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cxl_psa_unmap((void __iomem *)afu->afu_map);
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afu->afu_map = NULL;
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goto err1;
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}
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@ -1835,8 +1836,8 @@ retry:
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cmd->rcb.cdb[1] = mode;
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/* The cdb is aligned, no unaligned accessors required */
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*((u16 *)&cmd->rcb.cdb[2]) = swab16(ctx_hndl_u);
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*((u32 *)&cmd->rcb.cdb[4]) = swab32(res_hndl_u);
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*((__be16 *)&cmd->rcb.cdb[2]) = cpu_to_be16(ctx_hndl_u);
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*((__be32 *)&cmd->rcb.cdb[4]) = cpu_to_be32(res_hndl_u);
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rc = send_cmd(afu, cmd);
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if (unlikely(rc))
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@ -253,7 +253,7 @@ static int afu_attach(struct cxlflash_cfg *cfg, struct ctx_info *ctxi)
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{
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struct device *dev = &cfg->dev->dev;
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struct afu *afu = cfg->afu;
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struct sisl_ctrl_map *ctrl_map = ctxi->ctrl_map;
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struct sisl_ctrl_map __iomem *ctrl_map = ctxi->ctrl_map;
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int rc = 0;
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u64 val;
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@ -365,8 +365,8 @@ retry:
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* as the buffer is allocated on an aligned boundary.
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*/
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mutex_lock(&gli->mutex);
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gli->max_lba = be64_to_cpu(*((u64 *)&cmd_buf[0]));
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gli->blk_len = be32_to_cpu(*((u32 *)&cmd_buf[8]));
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gli->max_lba = be64_to_cpu(*((__be64 *)&cmd_buf[0]));
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gli->blk_len = be32_to_cpu(*((__be32 *)&cmd_buf[8]));
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mutex_unlock(&gli->mutex);
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out:
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@ -91,7 +91,7 @@ enum ctx_ctrl {
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#define DECODE_CTXID(_val) (_val & 0xFFFFFFFF)
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struct ctx_info {
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struct sisl_ctrl_map *ctrl_map; /* initialized at startup */
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struct sisl_ctrl_map __iomem *ctrl_map; /* initialized at startup */
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struct sisl_rht_entry *rht_start; /* 1 page (req'd for alignment),
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alloc/free on attach/detach */
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u32 rht_out; /* Number of checked out RHT entries */
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@ -786,7 +786,7 @@ void cxlflash_restore_luntable(struct cxlflash_cfg *cfg)
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u32 chan;
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u32 lind;
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struct afu *afu = cfg->afu;
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struct sisl_global_map *agm = &afu->afu_map->global;
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struct sisl_global_map __iomem *agm = &afu->afu_map->global;
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mutex_lock(&global.mutex);
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@ -831,7 +831,7 @@ static int init_luntable(struct cxlflash_cfg *cfg, struct llun_info *lli)
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u32 lind;
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int rc = 0;
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struct afu *afu = cfg->afu;
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struct sisl_global_map *agm = &afu->afu_map->global;
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struct sisl_global_map __iomem *agm = &afu->afu_map->global;
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mutex_lock(&global.mutex);
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